sdhci.c revision 482fce997e143a8d5429406fe066d31aa76ef70a
1d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman/* 270f10482c668301c483acded13bf68780ad352b9Pierre Ossman * linux/drivers/mmc/host/sdhci.c - Secure Digital Host Controller Interface driver 3d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * 4b69c9058907642f8e1b32076906755c6623ea060Pierre Ossman * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved. 5d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * 6d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * This program is free software; you can redistribute it and/or modify 7643f720cea989d2913fc0120a2384fecc1be1f9aPierre Ossman * it under the terms of the GNU General Public License as published by 8643f720cea989d2913fc0120a2384fecc1be1f9aPierre Ossman * the Free Software Foundation; either version 2 of the License, or (at 9643f720cea989d2913fc0120a2384fecc1be1f9aPierre Ossman * your option) any later version. 1084c46a53fc4ea4ff36df783a20187b2f65dd21ccPierre Ossman * 1184c46a53fc4ea4ff36df783a20187b2f65dd21ccPierre Ossman * Thanks to the following companies for their support: 1284c46a53fc4ea4ff36df783a20187b2f65dd21ccPierre Ossman * 1384c46a53fc4ea4ff36df783a20187b2f65dd21ccPierre Ossman * - JMicron (hardware and technical support) 14d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman */ 15d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 16d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman#include <linux/delay.h> 17d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman#include <linux/highmem.h> 18b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman#include <linux/io.h> 1988b47679746b81534002bcba42da97ab82b5d12aPaul Gortmaker#include <linux/module.h> 20d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman#include <linux/dma-mapping.h> 215a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 22117636092a87a28a013a4acb5de5492645ed620fRalf Baechle#include <linux/scatterlist.h> 239bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski#include <linux/regulator/consumer.h> 2466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter#include <linux/pm_runtime.h> 25d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 262f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman#include <linux/leds.h> 272f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman 2822113efd00491310da802f3b1a9a66cfcf415facAries Lee#include <linux/mmc/mmc.h> 29d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman#include <linux/mmc/host.h> 30d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 31d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman#include "sdhci.h" 32d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 33d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman#define DRIVER_NAME "sdhci" 34d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 35d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman#define DBG(f, x...) \ 36c65631781eb0f2e81865017c1484e9aef76e1b61Russell King pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x) 37d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 38f9134319c81c6c56e0ddf38e7adac2492b243d9bPierre Ossman#if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \ 39f9134319c81c6c56e0ddf38e7adac2492b243d9bPierre Ossman defined(CONFIG_MMC_SDHCI_MODULE)) 40f9134319c81c6c56e0ddf38e7adac2492b243d9bPierre Ossman#define SDHCI_USE_LEDS_CLASS 41f9134319c81c6c56e0ddf38e7adac2492b243d9bPierre Ossman#endif 42f9134319c81c6c56e0ddf38e7adac2492b243d9bPierre Ossman 43b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath#define MAX_TUNING_LOOP 40 44b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 45df673b227ce08a7706b30fd2bf6512393d9c3c29Pierre Ossmanstatic unsigned int debug_quirks = 0; 4666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic unsigned int debug_quirks2; 476743527441430586aa82a0dee1b2700a2a974ebcPierre Ossman 48d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_finish_data(struct sdhci_host *); 49d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 50d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_send_command(struct sdhci_host *, struct mmc_command *); 51d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_finish_command(struct sdhci_host *); 52cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nathstatic int sdhci_execute_tuning(struct mmc_host *mmc); 53cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nathstatic void sdhci_tuning_timer(unsigned long data); 54d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 5566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter#ifdef CONFIG_PM_RUNTIME 5666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic int sdhci_runtime_pm_get(struct sdhci_host *host); 5766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic int sdhci_runtime_pm_put(struct sdhci_host *host); 5866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter#else 5966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic inline int sdhci_runtime_pm_get(struct sdhci_host *host) 6066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter{ 6166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter return 0; 6266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter} 6366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic inline int sdhci_runtime_pm_put(struct sdhci_host *host) 6466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter{ 6566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter return 0; 6666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter} 6766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter#endif 6866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 69d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_dumpregs(struct sdhci_host *host) 70d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 71a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": =========== REGISTER DUMP (%s)===========\n", 72412ab659b2bdad6afac8f84daf2a8a393145dcaePhilip Rakity mmc_hostname(host->mmc)); 73d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 74a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n", 754e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readl(host, SDHCI_DMA_ADDRESS), 764e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readw(host, SDHCI_HOST_VERSION)); 77a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n", 784e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readw(host, SDHCI_BLOCK_SIZE), 794e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readw(host, SDHCI_BLOCK_COUNT)); 80a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n", 814e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readl(host, SDHCI_ARGUMENT), 824e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readw(host, SDHCI_TRANSFER_MODE)); 83a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n", 844e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readl(host, SDHCI_PRESENT_STATE), 854e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readb(host, SDHCI_HOST_CONTROL)); 86a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n", 874e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readb(host, SDHCI_POWER_CONTROL), 884e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readb(host, SDHCI_BLOCK_GAP_CONTROL)); 89a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n", 904e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readb(host, SDHCI_WAKE_UP_CONTROL), 914e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readw(host, SDHCI_CLOCK_CONTROL)); 92a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n", 934e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readb(host, SDHCI_TIMEOUT_CONTROL), 944e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readl(host, SDHCI_INT_STATUS)); 95a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n", 964e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readl(host, SDHCI_INT_ENABLE), 974e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readl(host, SDHCI_SIGNAL_ENABLE)); 98a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n", 994e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readw(host, SDHCI_ACMD12_ERR), 1004e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readw(host, SDHCI_SLOT_INT_STATUS)); 101a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": Caps: 0x%08x | Caps_1: 0x%08x\n", 1024e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readl(host, SDHCI_CAPABILITIES), 103e8120ad129c160ff5b2e2b197d025a2cd661c2f2Philip Rakity sdhci_readl(host, SDHCI_CAPABILITIES_1)); 104a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": Cmd: 0x%08x | Max curr: 0x%08x\n", 105e8120ad129c160ff5b2e2b197d025a2cd661c2f2Philip Rakity sdhci_readw(host, SDHCI_COMMAND), 1064e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readl(host, SDHCI_MAX_CURRENT)); 107a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": Host ctl2: 0x%08x\n", 108f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath sdhci_readw(host, SDHCI_HOST_CONTROL2)); 109d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 110be3f4ae0c0c56aab903aceaceed4b9d8418e180eBen Dooks if (host->flags & SDHCI_USE_ADMA) 111a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x\n", 112be3f4ae0c0c56aab903aceaceed4b9d8418e180eBen Dooks readl(host->ioaddr + SDHCI_ADMA_ERROR), 113be3f4ae0c0c56aab903aceaceed4b9d8418e180eBen Dooks readl(host->ioaddr + SDHCI_ADMA_ADDRESS)); 114be3f4ae0c0c56aab903aceaceed4b9d8418e180eBen Dooks 115a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_debug(DRIVER_NAME ": ===========================================\n"); 116d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 117d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 118d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman/*****************************************************************************\ 119d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 120d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * Low level functions * 121d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 122d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman\*****************************************************************************/ 123d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1247260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsovstatic void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set) 1257260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov{ 1267260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov u32 ier; 1277260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov 1287260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov ier = sdhci_readl(host, SDHCI_INT_ENABLE); 1297260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov ier &= ~clear; 1307260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov ier |= set; 1317260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_writel(host, ier, SDHCI_INT_ENABLE); 1327260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); 1337260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov} 1347260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov 1357260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsovstatic void sdhci_unmask_irqs(struct sdhci_host *host, u32 irqs) 1367260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov{ 1377260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_clear_set_irqs(host, 0, irqs); 1387260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov} 1397260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov 1407260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsovstatic void sdhci_mask_irqs(struct sdhci_host *host, u32 irqs) 1417260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov{ 1427260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_clear_set_irqs(host, irqs, 0); 1437260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov} 1447260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov 1457260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsovstatic void sdhci_set_card_detection(struct sdhci_host *host, bool enable) 1467260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov{ 147d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo u32 present, irqs; 1487260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov 14968d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) 15068d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov return; 15168d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov 15266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (host->quirks2 & SDHCI_QUIRK2_OWN_CARD_DETECTION) 15366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter return; 15466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 155d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo present = sdhci_readl(host, SDHCI_PRESENT_STATE) & 156d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo SDHCI_CARD_PRESENT; 157d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo irqs = present ? SDHCI_INT_CARD_REMOVE : SDHCI_INT_CARD_INSERT; 158d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo 1597260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov if (enable) 1607260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_unmask_irqs(host, irqs); 1617260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov else 1627260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_mask_irqs(host, irqs); 1637260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov} 1647260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov 1657260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsovstatic void sdhci_enable_card_detection(struct sdhci_host *host) 1667260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov{ 1677260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_set_card_detection(host, true); 1687260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov} 1697260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov 1707260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsovstatic void sdhci_disable_card_detection(struct sdhci_host *host) 1717260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov{ 1727260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_set_card_detection(host, false); 1737260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov} 1747260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov 175d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_reset(struct sdhci_host *host, u8 mask) 176d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 177e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman unsigned long timeout; 178063a9dbbce5559770b7e2e2f51bd29adf3ab9b1eAnton Vorontsov u32 uninitialized_var(ier); 179e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman 180b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) { 1814e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & 1828a4da1430f7f2a16df3be9c7b5d55ba4e75b708cPierre Ossman SDHCI_CARD_PRESENT)) 1838a4da1430f7f2a16df3be9c7b5d55ba4e75b708cPierre Ossman return; 1848a4da1430f7f2a16df3be9c7b5d55ba4e75b708cPierre Ossman } 1858a4da1430f7f2a16df3be9c7b5d55ba4e75b708cPierre Ossman 186063a9dbbce5559770b7e2e2f51bd29adf3ab9b1eAnton Vorontsov if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET) 187063a9dbbce5559770b7e2e2f51bd29adf3ab9b1eAnton Vorontsov ier = sdhci_readl(host, SDHCI_INT_ENABLE); 188063a9dbbce5559770b7e2e2f51bd29adf3ab9b1eAnton Vorontsov 189393c1a34dd852dbf0c409ec94dd48057100480eaPhilip Rakity if (host->ops->platform_reset_enter) 190393c1a34dd852dbf0c409ec94dd48057100480eaPhilip Rakity host->ops->platform_reset_enter(host, mask); 191393c1a34dd852dbf0c409ec94dd48057100480eaPhilip Rakity 1924e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET); 193d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 194e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman if (mask & SDHCI_RESET_ALL) 195d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host->clock = 0; 196d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 197e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman /* Wait max 100 ms */ 198e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman timeout = 100; 199e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman 200e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman /* hw clears the bit when it's done */ 2014e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) { 202e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman if (timeout == 0) { 203a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Reset 0x%x never completed.\n", 204e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman mmc_hostname(host->mmc), (int)mask); 205e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman sdhci_dumpregs(host); 206e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman return; 207e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman } 208e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman timeout--; 209e16514d8d86ecbde18a2a7495cf028861b34c157Pierre Ossman mdelay(1); 210d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 211063a9dbbce5559770b7e2e2f51bd29adf3ab9b1eAnton Vorontsov 212393c1a34dd852dbf0c409ec94dd48057100480eaPhilip Rakity if (host->ops->platform_reset_exit) 213393c1a34dd852dbf0c409ec94dd48057100480eaPhilip Rakity host->ops->platform_reset_exit(host, mask); 214393c1a34dd852dbf0c409ec94dd48057100480eaPhilip Rakity 215063a9dbbce5559770b7e2e2f51bd29adf3ab9b1eAnton Vorontsov if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET) 216063a9dbbce5559770b7e2e2f51bd29adf3ab9b1eAnton Vorontsov sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, ier); 217d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 218d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2192f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitrestatic void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios); 2202f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre 2212f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitrestatic void sdhci_init(struct sdhci_host *host, int soft) 222d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 2232f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre if (soft) 2242f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre sdhci_reset(host, SDHCI_RESET_CMD|SDHCI_RESET_DATA); 2252f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre else 2262f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre sdhci_reset(host, SDHCI_RESET_ALL); 227d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2287260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, 2297260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT | 2303192a28f7d34ea8f1d0fef8ca5bc0314b5b5bb19Pierre Ossman SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX | 2313192a28f7d34ea8f1d0fef8ca5bc0314b5b5bb19Pierre Ossman SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT | 2326aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsov SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE); 2332f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre 2342f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre if (soft) { 2352f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre /* force clock reconfiguration */ 2362f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre host->clock = 0; 2372f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre sdhci_set_ios(host->mmc, &host->mmc->ios); 2382f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre } 2397260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov} 240d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2417260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsovstatic void sdhci_reinit(struct sdhci_host *host) 2427260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov{ 2432f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre sdhci_init(host, 0); 2447260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_enable_card_detection(host); 245d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 246d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 247d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_activate_led(struct sdhci_host *host) 248d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 249d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman u8 ctrl; 250d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2514e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); 252d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman ctrl |= SDHCI_CTRL_LED; 2534e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); 254d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 255d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 256d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_deactivate_led(struct sdhci_host *host) 257d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 258d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman u8 ctrl; 259d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2604e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); 261d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman ctrl &= ~SDHCI_CTRL_LED; 2624e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); 263d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 264d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 265f9134319c81c6c56e0ddf38e7adac2492b243d9bPierre Ossman#ifdef SDHCI_USE_LEDS_CLASS 2662f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossmanstatic void sdhci_led_control(struct led_classdev *led, 2672f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman enum led_brightness brightness) 2682f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman{ 2692f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman struct sdhci_host *host = container_of(led, struct sdhci_host, led); 2702f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman unsigned long flags; 2712f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman 2722f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman spin_lock_irqsave(&host->lock, flags); 2732f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman 27466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (host->runtime_suspended) 27566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter goto out; 27666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 2772f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman if (brightness == LED_OFF) 2782f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman sdhci_deactivate_led(host); 2792f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman else 2802f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman sdhci_activate_led(host); 28166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterout: 2822f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman spin_unlock_irqrestore(&host->lock, flags); 2832f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman} 2842f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman#endif 2852f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman 286d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman/*****************************************************************************\ 287d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 288d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * Core functions * 289d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 290d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman\*****************************************************************************/ 291d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 292a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossmanstatic void sdhci_read_block_pio(struct sdhci_host *host) 293d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 2947659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman unsigned long flags; 2957659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman size_t blksize, len, chunk; 2967244b85bd17313d7d300ee93ec7bfbca1f4ccf3dSteven Noonan u32 uninitialized_var(scratch); 2977659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman u8 *buf; 298d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 299a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman DBG("PIO reading\n"); 300d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 301a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman blksize = host->data->blksz; 3027659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman chunk = 0; 303d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3047659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman local_irq_save(flags); 305d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 306a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman while (blksize) { 3077659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman if (!sg_miter_next(&host->sg_miter)) 3087659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman BUG(); 309d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3107659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman len = min(host->sg_miter.length, blksize); 311d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3127659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman blksize -= len; 3137659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman host->sg_miter.consumed = len; 31414d836e7499c53a1f6a65086c3d11600e871a971Alex Dubov 3157659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman buf = host->sg_miter.addr; 316d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3177659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman while (len) { 3187659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman if (chunk == 0) { 3194e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov scratch = sdhci_readl(host, SDHCI_BUFFER); 3207659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman chunk = 4; 321a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman } 3227659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman 3237659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman *buf = scratch & 0xFF; 3247659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman 3257659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman buf++; 3267659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman scratch >>= 8; 3277659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman chunk--; 3287659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman len--; 329d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 330a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman } 3317659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman 3327659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman sg_miter_stop(&host->sg_miter); 3337659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman 3347659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman local_irq_restore(flags); 335a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman} 336d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 337a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossmanstatic void sdhci_write_block_pio(struct sdhci_host *host) 338a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman{ 3397659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman unsigned long flags; 3407659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman size_t blksize, len, chunk; 3417659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman u32 scratch; 3427659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman u8 *buf; 343d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 344a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman DBG("PIO writing\n"); 345a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman 346a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman blksize = host->data->blksz; 3477659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman chunk = 0; 3487659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman scratch = 0; 349d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3507659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman local_irq_save(flags); 351d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 352a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman while (blksize) { 3537659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman if (!sg_miter_next(&host->sg_miter)) 3547659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman BUG(); 355a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman 3567659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman len = min(host->sg_miter.length, blksize); 3577659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman 3587659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman blksize -= len; 3597659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman host->sg_miter.consumed = len; 3607659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman 3617659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman buf = host->sg_miter.addr; 362d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3637659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman while (len) { 3647659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman scratch |= (u32)*buf << (chunk * 8); 3657659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman 3667659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman buf++; 3677659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman chunk++; 3687659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman len--; 3697659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman 3707659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman if ((chunk == 4) || ((len == 0) && (blksize == 0))) { 3714e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writel(host, scratch, SDHCI_BUFFER); 3727659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman chunk = 0; 3737659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman scratch = 0; 374d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 375d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 376d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 3777659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman 3787659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman sg_miter_stop(&host->sg_miter); 3797659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman 3807659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman local_irq_restore(flags); 381a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman} 382a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman 383a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossmanstatic void sdhci_transfer_pio(struct sdhci_host *host) 384a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman{ 385a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman u32 mask; 386a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman 387a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman BUG_ON(!host->data); 388a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman 3897659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman if (host->blocks == 0) 390a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman return; 391a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman 392a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman if (host->data->flags & MMC_DATA_READ) 393a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman mask = SDHCI_DATA_AVAILABLE; 394a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman else 395a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman mask = SDHCI_SPACE_AVAILABLE; 396a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman 3974a3cba32cb514168bb2516c045b178e6660421d1Pierre Ossman /* 3984a3cba32cb514168bb2516c045b178e6660421d1Pierre Ossman * Some controllers (JMicron JMB38x) mess up the buffer bits 3994a3cba32cb514168bb2516c045b178e6660421d1Pierre Ossman * for transfers < 4 bytes. As long as it is just one block, 4004a3cba32cb514168bb2516c045b178e6660421d1Pierre Ossman * we can ignore the bits. 4014a3cba32cb514168bb2516c045b178e6660421d1Pierre Ossman */ 4024a3cba32cb514168bb2516c045b178e6660421d1Pierre Ossman if ((host->quirks & SDHCI_QUIRK_BROKEN_SMALL_PIO) && 4034a3cba32cb514168bb2516c045b178e6660421d1Pierre Ossman (host->data->blocks == 1)) 4044a3cba32cb514168bb2516c045b178e6660421d1Pierre Ossman mask = ~0; 4054a3cba32cb514168bb2516c045b178e6660421d1Pierre Ossman 4064e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) { 4073e3bf20756aeee57a40fd37b923263c9a51b8c68Anton Vorontsov if (host->quirks & SDHCI_QUIRK_PIO_NEEDS_DELAY) 4083e3bf20756aeee57a40fd37b923263c9a51b8c68Anton Vorontsov udelay(100); 4093e3bf20756aeee57a40fd37b923263c9a51b8c68Anton Vorontsov 410a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman if (host->data->flags & MMC_DATA_READ) 411a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman sdhci_read_block_pio(host); 412a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman else 413a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman sdhci_write_block_pio(host); 414d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 4157659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman host->blocks--; 4167659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman if (host->blocks == 0) 417a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman break; 418a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman } 419d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 420a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman DBG("PIO transfer complete.\n"); 421d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 422d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 4232134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossmanstatic char *sdhci_kmap_atomic(struct scatterlist *sg, unsigned long *flags) 4242134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman{ 4252134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman local_irq_save(*flags); 426482fce997e143a8d5429406fe066d31aa76ef70aCong Wang return kmap_atomic(sg_page(sg)) + sg->offset; 4272134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman} 4282134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 4292134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossmanstatic void sdhci_kunmap_atomic(void *buffer, unsigned long *flags) 4302134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman{ 431482fce997e143a8d5429406fe066d31aa76ef70aCong Wang kunmap_atomic(buffer); 4322134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman local_irq_restore(*flags); 4332134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman} 4342134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 435118cd17d4137f34c747c32765c1cb4d3910c04d4Ben Dooksstatic void sdhci_set_adma_desc(u8 *desc, u32 addr, int len, unsigned cmd) 436118cd17d4137f34c747c32765c1cb4d3910c04d4Ben Dooks{ 4379e506f35b1dc327c448d4791bc098f07b9b2efe9Ben Dooks __le32 *dataddr = (__le32 __force *)(desc + 4); 4389e506f35b1dc327c448d4791bc098f07b9b2efe9Ben Dooks __le16 *cmdlen = (__le16 __force *)desc; 439118cd17d4137f34c747c32765c1cb4d3910c04d4Ben Dooks 4409e506f35b1dc327c448d4791bc098f07b9b2efe9Ben Dooks /* SDHCI specification says ADMA descriptors should be 4 byte 4419e506f35b1dc327c448d4791bc098f07b9b2efe9Ben Dooks * aligned, so using 16 or 32bit operations should be safe. */ 442118cd17d4137f34c747c32765c1cb4d3910c04d4Ben Dooks 4439e506f35b1dc327c448d4791bc098f07b9b2efe9Ben Dooks cmdlen[0] = cpu_to_le16(cmd); 4449e506f35b1dc327c448d4791bc098f07b9b2efe9Ben Dooks cmdlen[1] = cpu_to_le16(len); 4459e506f35b1dc327c448d4791bc098f07b9b2efe9Ben Dooks 4469e506f35b1dc327c448d4791bc098f07b9b2efe9Ben Dooks dataddr[0] = cpu_to_le32(addr); 447118cd17d4137f34c747c32765c1cb4d3910c04d4Ben Dooks} 448118cd17d4137f34c747c32765c1cb4d3910c04d4Ben Dooks 4498f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossmanstatic int sdhci_adma_table_pre(struct sdhci_host *host, 4502134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman struct mmc_data *data) 4512134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman{ 4522134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman int direction; 4532134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 4542134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman u8 *desc; 4552134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman u8 *align; 4562134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman dma_addr_t addr; 4572134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman dma_addr_t align_addr; 4582134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman int len, offset; 4592134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 4602134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman struct scatterlist *sg; 4612134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman int i; 4622134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman char *buffer; 4632134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman unsigned long flags; 4642134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 4652134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman /* 4662134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * The spec does not specify endianness of descriptor table. 4672134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * We currently guess that it is LE. 4682134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman */ 4692134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 4702134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (data->flags & MMC_DATA_READ) 4712134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman direction = DMA_FROM_DEVICE; 4722134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman else 4732134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman direction = DMA_TO_DEVICE; 4742134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 4752134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman /* 4762134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * The ADMA descriptor table is mapped further down as we 4772134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * need to fill it with data first. 4782134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman */ 4792134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 4802134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->align_addr = dma_map_single(mmc_dev(host->mmc), 4812134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->align_buffer, 128 * 4, direction); 4828d8bb39b9eba32dd70e87fd5ad5c5dd4ba118e06FUJITA Tomonori if (dma_mapping_error(mmc_dev(host->mmc), host->align_addr)) 4838f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman goto fail; 4842134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman BUG_ON(host->align_addr & 0x3); 4852134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 4862134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->sg_count = dma_map_sg(mmc_dev(host->mmc), 4872134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman data->sg, data->sg_len, direction); 4888f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman if (host->sg_count == 0) 4898f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman goto unmap_align; 4902134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 4912134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman desc = host->adma_desc; 4922134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman align = host->align_buffer; 4932134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 4942134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman align_addr = host->align_addr; 4952134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 4962134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman for_each_sg(data->sg, sg, host->sg_count, i) { 4972134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman addr = sg_dma_address(sg); 4982134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman len = sg_dma_len(sg); 4992134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 5002134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman /* 5012134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * The SDHCI specification states that ADMA 5022134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * addresses must be 32-bit aligned. If they 5032134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * aren't, then we use a bounce buffer for 5042134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * the (up to three) bytes that screw up the 5052134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * alignment. 5062134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman */ 5072134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman offset = (4 - (addr & 0x3)) & 0x3; 5082134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (offset) { 5092134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (data->flags & MMC_DATA_WRITE) { 5102134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman buffer = sdhci_kmap_atomic(sg, &flags); 5116cefd05f35177ad5d22d44519c680cf43f2ac86dPierre Ossman WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3)); 5122134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman memcpy(align, buffer, offset); 5132134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman sdhci_kunmap_atomic(buffer, &flags); 5142134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 5152134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 516118cd17d4137f34c747c32765c1cb4d3910c04d4Ben Dooks /* tran, valid */ 517118cd17d4137f34c747c32765c1cb4d3910c04d4Ben Dooks sdhci_set_adma_desc(desc, align_addr, offset, 0x21); 5182134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 5192134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman BUG_ON(offset > 65536); 5202134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 5212134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman align += 4; 5222134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman align_addr += 4; 5232134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 5242134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman desc += 8; 5252134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 5262134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman addr += offset; 5272134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman len -= offset; 5282134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 5292134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 5302134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman BUG_ON(len > 65536); 5312134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 532118cd17d4137f34c747c32765c1cb4d3910c04d4Ben Dooks /* tran, valid */ 533118cd17d4137f34c747c32765c1cb4d3910c04d4Ben Dooks sdhci_set_adma_desc(desc, addr, len, 0x21); 5342134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman desc += 8; 5352134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 5362134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman /* 5372134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * If this triggers then we have a calculation bug 5382134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * somewhere. :/ 5392134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman */ 5402134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman WARN_ON((desc - host->adma_desc) > (128 * 2 + 1) * 4); 5412134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 5422134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 54370764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham if (host->quirks & SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC) { 54470764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham /* 54570764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham * Mark the last descriptor as the terminating descriptor 54670764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham */ 54770764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham if (desc != host->adma_desc) { 54870764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham desc -= 8; 54970764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham desc[0] |= 0x2; /* end */ 55070764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham } 55170764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham } else { 55270764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham /* 55370764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham * Add a terminating entry. 55470764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham */ 5552134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 55670764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham /* nop, end, valid */ 55770764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham sdhci_set_adma_desc(desc, 0, 0, 0x3); 55870764a905785ebacc8d44fed7a12fba3db267ae6Thomas Abraham } 5592134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 5602134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman /* 5612134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * Resync align buffer as we might have changed it. 5622134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman */ 5632134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (data->flags & MMC_DATA_WRITE) { 5642134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman dma_sync_single_for_device(mmc_dev(host->mmc), 5652134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->align_addr, 128 * 4, direction); 5662134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 5672134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 5682134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->adma_addr = dma_map_single(mmc_dev(host->mmc), 5692134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->adma_desc, (128 * 2 + 1) * 4, DMA_TO_DEVICE); 570980167b7fb20fb181766218b4771fc7420a7bbb4Pierre Ossman if (dma_mapping_error(mmc_dev(host->mmc), host->adma_addr)) 5718f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman goto unmap_entries; 5722134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman BUG_ON(host->adma_addr & 0x3); 5738f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman 5748f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman return 0; 5758f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman 5768f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossmanunmap_entries: 5778f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman dma_unmap_sg(mmc_dev(host->mmc), data->sg, 5788f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman data->sg_len, direction); 5798f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossmanunmap_align: 5808f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman dma_unmap_single(mmc_dev(host->mmc), host->align_addr, 5818f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman 128 * 4, direction); 5828f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossmanfail: 5838f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman return -EINVAL; 5842134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman} 5852134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 5862134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossmanstatic void sdhci_adma_table_post(struct sdhci_host *host, 5872134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman struct mmc_data *data) 5882134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman{ 5892134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman int direction; 5902134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 5912134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman struct scatterlist *sg; 5922134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman int i, size; 5932134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman u8 *align; 5942134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman char *buffer; 5952134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman unsigned long flags; 5962134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 5972134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (data->flags & MMC_DATA_READ) 5982134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman direction = DMA_FROM_DEVICE; 5992134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman else 6002134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman direction = DMA_TO_DEVICE; 6012134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 6022134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman dma_unmap_single(mmc_dev(host->mmc), host->adma_addr, 6032134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman (128 * 2 + 1) * 4, DMA_TO_DEVICE); 6042134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 6052134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman dma_unmap_single(mmc_dev(host->mmc), host->align_addr, 6062134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 128 * 4, direction); 6072134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 6082134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (data->flags & MMC_DATA_READ) { 6092134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman dma_sync_sg_for_cpu(mmc_dev(host->mmc), data->sg, 6102134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman data->sg_len, direction); 6112134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 6122134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman align = host->align_buffer; 6132134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 6142134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman for_each_sg(data->sg, sg, host->sg_count, i) { 6152134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (sg_dma_address(sg) & 0x3) { 6162134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman size = 4 - (sg_dma_address(sg) & 0x3); 6172134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 6182134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman buffer = sdhci_kmap_atomic(sg, &flags); 6196cefd05f35177ad5d22d44519c680cf43f2ac86dPierre Ossman WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3)); 6202134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman memcpy(buffer, align, size); 6212134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman sdhci_kunmap_atomic(buffer, &flags); 6222134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 6232134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman align += 4; 6242134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 6252134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 6262134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 6272134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 6282134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman dma_unmap_sg(mmc_dev(host->mmc), data->sg, 6292134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman data->sg_len, direction); 6302134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman} 6312134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 632a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentinstatic u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd) 633d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 6341c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman u8 count; 635a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin struct mmc_data *data = cmd->data; 6361c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman unsigned target_timeout, current_timeout; 637d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 638ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman /* 639ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman * If the host controller provides us with an incorrect timeout 640ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman * value, just skip the check and use 0xE. The hardware may take 641ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman * longer to time out, but that's much better than having a too-short 642ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman * timeout value. 643ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman */ 64411a2f1b78a43d0c2bd026d79b952742c7588f529Pierre Ossman if (host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL) 645ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman return 0xE; 646e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman 647a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin /* Unspecified timeout, assume max */ 648a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin if (!data && !cmd->cmd_timeout_ms) 649a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin return 0xE; 650d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 651a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin /* timeout in us */ 652a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin if (!data) 653a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin target_timeout = cmd->cmd_timeout_ms * 1000; 65478a2ca2727a9b992901c715bc881b6ddb4ec6a4eAndy Shevchenko else { 65578a2ca2727a9b992901c715bc881b6ddb4ec6a4eAndy Shevchenko target_timeout = data->timeout_ns / 1000; 65678a2ca2727a9b992901c715bc881b6ddb4ec6a4eAndy Shevchenko if (host->clock) 65778a2ca2727a9b992901c715bc881b6ddb4ec6a4eAndy Shevchenko target_timeout += data->timeout_clks / host->clock; 65878a2ca2727a9b992901c715bc881b6ddb4ec6a4eAndy Shevchenko } 65981b39802468fe4bf5c6b038837319b608acfdd3eAnton Vorontsov 6601c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman /* 6611c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman * Figure out needed cycles. 6621c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman * We do this in steps in order to fit inside a 32 bit int. 6631c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman * The first step is the minimum timeout, which will have a 6641c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman * minimum resolution of 6 bits: 6651c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman * (1) 2^13*1000 > 2^22, 6661c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman * (2) host->timeout_clk < 2^16 6671c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman * => 6681c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman * (1) / (2) > 2^6 6691c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman */ 6701c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman count = 0; 6711c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman current_timeout = (1 << 13) * 1000 / host->timeout_clk; 6721c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman while (current_timeout < target_timeout) { 6731c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman count++; 6741c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman current_timeout <<= 1; 6751c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman if (count >= 0xF) 6761c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman break; 6771c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman } 6781c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman 6791c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman if (count >= 0xF) { 680a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_warning("%s: Too large timeout requested for CMD%d!\n", 681a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin mmc_hostname(host->mmc), cmd->opcode); 6821c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman count = 0xE; 6831c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman } 6841c8cde92fa5c57daa9ff58d970ca6374f8d484a2Pierre Ossman 685ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman return count; 686ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman} 687ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman 6886aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsovstatic void sdhci_set_transfer_irqs(struct sdhci_host *host) 6896aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsov{ 6906aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsov u32 pio_irqs = SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL; 6916aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsov u32 dma_irqs = SDHCI_INT_DMA_END | SDHCI_INT_ADMA_ERROR; 6926aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsov 6936aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsov if (host->flags & SDHCI_REQ_USE_DMA) 6946aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsov sdhci_clear_set_irqs(host, pio_irqs, dma_irqs); 6956aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsov else 6966aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsov sdhci_clear_set_irqs(host, dma_irqs, pio_irqs); 6976aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsov} 6986aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsov 699a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentinstatic void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd) 700ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman{ 701ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman u8 count; 7022134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman u8 ctrl; 703a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin struct mmc_data *data = cmd->data; 7048f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman int ret; 705ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman 706ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman WARN_ON(host->data); 707ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman 708a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin if (data || (cmd->flags & MMC_RSP_BUSY)) { 709a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin count = sdhci_calc_timeout(host, cmd); 710a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL); 711a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin } 712a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin 713a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin if (!data) 714ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman return; 715ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman 716ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman /* Sanity checks */ 717ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman BUG_ON(data->blksz * data->blocks > 524288); 718ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman BUG_ON(data->blksz > host->mmc->max_blk_size); 719ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman BUG_ON(data->blocks > 65535); 720ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman 721ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman host->data = data; 722ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman host->data_early = 0; 723f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni host->data->bytes_xfered = 0; 724ee53ab5d73998e502801c024a08de2c39a92c52aPierre Ossman 725a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) 726c9fddbc4f844f5a16b5957c61fe2cfcb5c12f990Pierre Ossman host->flags |= SDHCI_REQ_USE_DMA; 727c9fddbc4f844f5a16b5957c61fe2cfcb5c12f990Pierre Ossman 7282134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman /* 7292134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * FIXME: This doesn't account for merging when mapping the 7302134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * scatterlist. 7312134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman */ 7322134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (host->flags & SDHCI_REQ_USE_DMA) { 7332134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman int broken, i; 7342134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman struct scatterlist *sg; 7352134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 7362134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman broken = 0; 7372134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (host->flags & SDHCI_USE_ADMA) { 7382134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE) 7392134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman broken = 1; 7402134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } else { 7412134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (host->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE) 7422134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman broken = 1; 7432134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 7442134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 7452134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (unlikely(broken)) { 7462134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman for_each_sg(data->sg, sg, data->sg_len, i) { 7472134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (sg->length & 0x3) { 7482134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman DBG("Reverting to PIO because of " 7492134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman "transfer size (%d)\n", 7502134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman sg->length); 7512134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->flags &= ~SDHCI_REQ_USE_DMA; 7522134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman break; 7532134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 7542134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 7552134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 756c9fddbc4f844f5a16b5957c61fe2cfcb5c12f990Pierre Ossman } 757c9fddbc4f844f5a16b5957c61fe2cfcb5c12f990Pierre Ossman 758c9fddbc4f844f5a16b5957c61fe2cfcb5c12f990Pierre Ossman /* 759c9fddbc4f844f5a16b5957c61fe2cfcb5c12f990Pierre Ossman * The assumption here being that alignment is the same after 760c9fddbc4f844f5a16b5957c61fe2cfcb5c12f990Pierre Ossman * translation to device address space. 761c9fddbc4f844f5a16b5957c61fe2cfcb5c12f990Pierre Ossman */ 7622134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (host->flags & SDHCI_REQ_USE_DMA) { 7632134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman int broken, i; 7642134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman struct scatterlist *sg; 7652134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 7662134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman broken = 0; 7672134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (host->flags & SDHCI_USE_ADMA) { 7682134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman /* 7692134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * As we use 3 byte chunks to work around 7702134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * alignment problems, we need to check this 7712134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * quirk. 7722134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman */ 7732134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE) 7742134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman broken = 1; 7752134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } else { 7762134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) 7772134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman broken = 1; 7782134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 7792134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 7802134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (unlikely(broken)) { 7812134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman for_each_sg(data->sg, sg, data->sg_len, i) { 7822134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (sg->offset & 0x3) { 7832134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman DBG("Reverting to PIO because of " 7842134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman "bad alignment\n"); 7852134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->flags &= ~SDHCI_REQ_USE_DMA; 7862134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman break; 7872134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 7882134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 7892134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 7902134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 7912134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 7928f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman if (host->flags & SDHCI_REQ_USE_DMA) { 7938f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman if (host->flags & SDHCI_USE_ADMA) { 7948f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman ret = sdhci_adma_table_pre(host, data); 7958f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman if (ret) { 7968f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman /* 7978f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman * This only happens when someone fed 7988f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman * us an invalid request. 7998f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman */ 8008f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman WARN_ON(1); 801ebd6d357848edb8709dd9bed4b93834d1b4d7044Pierre Ossman host->flags &= ~SDHCI_REQ_USE_DMA; 8028f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman } else { 8034e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writel(host, host->adma_addr, 8044e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov SDHCI_ADMA_ADDRESS); 8058f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman } 8068f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman } else { 807c8b3e02eb250ceb661437e9b198757eff0eb6fd2Tomas Winkler int sg_cnt; 8088f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman 809c8b3e02eb250ceb661437e9b198757eff0eb6fd2Tomas Winkler sg_cnt = dma_map_sg(mmc_dev(host->mmc), 8108f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman data->sg, data->sg_len, 8118f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman (data->flags & MMC_DATA_READ) ? 8128f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman DMA_FROM_DEVICE : 8138f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman DMA_TO_DEVICE); 814c8b3e02eb250ceb661437e9b198757eff0eb6fd2Tomas Winkler if (sg_cnt == 0) { 8158f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman /* 8168f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman * This only happens when someone fed 8178f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman * us an invalid request. 8188f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman */ 8198f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman WARN_ON(1); 820ebd6d357848edb8709dd9bed4b93834d1b4d7044Pierre Ossman host->flags &= ~SDHCI_REQ_USE_DMA; 8218f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman } else { 822719a61b452ff74cf81a96e4212748d9d63bcc924Pierre Ossman WARN_ON(sg_cnt != 1); 8234e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writel(host, sg_dma_address(data->sg), 8244e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov SDHCI_DMA_ADDRESS); 8258f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman } 8268f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman } 8278f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman } 8288f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman 8292134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman /* 8302134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * Always adjust the DMA selection as some controllers 8312134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * (e.g. JMicron) can't do PIO properly when the selection 8322134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * is ADMA. 8332134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman */ 8342134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (host->version >= SDHCI_SPEC_200) { 8354e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); 8362134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman ctrl &= ~SDHCI_CTRL_DMA_MASK; 8372134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if ((host->flags & SDHCI_REQ_USE_DMA) && 8382134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman (host->flags & SDHCI_USE_ADMA)) 8392134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman ctrl |= SDHCI_CTRL_ADMA32; 8402134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman else 8412134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman ctrl |= SDHCI_CTRL_SDMA; 8424e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); 843c9fddbc4f844f5a16b5957c61fe2cfcb5c12f990Pierre Ossman } 844c9fddbc4f844f5a16b5957c61fe2cfcb5c12f990Pierre Ossman 8458f1934ce784bd8f2eaf06f190526500f7f3f9c74Pierre Ossman if (!(host->flags & SDHCI_REQ_USE_DMA)) { 846da60a91d012bcb10bc5bcd86d585c4281742832cSebastian Andrzej Siewior int flags; 847da60a91d012bcb10bc5bcd86d585c4281742832cSebastian Andrzej Siewior 848da60a91d012bcb10bc5bcd86d585c4281742832cSebastian Andrzej Siewior flags = SG_MITER_ATOMIC; 849da60a91d012bcb10bc5bcd86d585c4281742832cSebastian Andrzej Siewior if (host->data->flags & MMC_DATA_READ) 850da60a91d012bcb10bc5bcd86d585c4281742832cSebastian Andrzej Siewior flags |= SG_MITER_TO_SG; 851da60a91d012bcb10bc5bcd86d585c4281742832cSebastian Andrzej Siewior else 852da60a91d012bcb10bc5bcd86d585c4281742832cSebastian Andrzej Siewior flags |= SG_MITER_FROM_SG; 853da60a91d012bcb10bc5bcd86d585c4281742832cSebastian Andrzej Siewior sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); 8547659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman host->blocks = data->blocks; 855d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 856c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman 8576aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsov sdhci_set_transfer_irqs(host); 8586aa943ab8994fe6e4ccba22c5bc8150a84268bddAnton Vorontsov 859f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni /* Set the DMA boundary value and block size */ 860f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, 861f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni data->blksz), SDHCI_BLOCK_SIZE); 8624e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT); 863c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman} 864c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman 865c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossmanstatic void sdhci_set_transfer_mode(struct sdhci_host *host, 866e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin struct mmc_command *cmd) 867c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman{ 868c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman u16 mode; 869e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin struct mmc_data *data = cmd->data; 870c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman 871c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman if (data == NULL) 872c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman return; 873c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman 874e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman WARN_ON(!host->data); 875e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman 876c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman mode = SDHCI_TRNS_BLK_CNT_EN; 877e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin if (mmc_op_multi(cmd->opcode) || data->blocks > 1) { 878e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin mode |= SDHCI_TRNS_MULTI; 879e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin /* 880e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin * If we are sending CMD23, CMD12 never gets sent 881e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin * on successful completion (so no Auto-CMD12). 882e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin */ 883e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin if (!host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) 884e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin mode |= SDHCI_TRNS_AUTO_CMD12; 8858edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin else if (host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD23)) { 8868edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin mode |= SDHCI_TRNS_AUTO_CMD23; 8878edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin sdhci_writel(host, host->mrq->sbc->arg, SDHCI_ARGUMENT2); 8888edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin } 889c4512f79dcb236c8dc2afae176a0dc520096f0bcJerry Huang } 8908edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin 891c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman if (data->flags & MMC_DATA_READ) 892c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman mode |= SDHCI_TRNS_READ; 893c9fddbc4f844f5a16b5957c61fe2cfcb5c12f990Pierre Ossman if (host->flags & SDHCI_REQ_USE_DMA) 894c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman mode |= SDHCI_TRNS_DMA; 895c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman 8964e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writew(host, mode, SDHCI_TRANSFER_MODE); 897d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 898d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 899d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_finish_data(struct sdhci_host *host) 900d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 901d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman struct mmc_data *data; 902d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 903d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman BUG_ON(!host->data); 904d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 905d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman data = host->data; 906d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host->data = NULL; 907d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 908c9fddbc4f844f5a16b5957c61fe2cfcb5c12f990Pierre Ossman if (host->flags & SDHCI_REQ_USE_DMA) { 9092134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (host->flags & SDHCI_USE_ADMA) 9102134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman sdhci_adma_table_post(host, data); 9112134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman else { 9122134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman dma_unmap_sg(mmc_dev(host->mmc), data->sg, 9132134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman data->sg_len, (data->flags & MMC_DATA_READ) ? 9142134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman DMA_FROM_DEVICE : DMA_TO_DEVICE); 9152134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 916d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 917d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 918d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman /* 919c9b74c5b8fb807187f6b1db09012828fcd2d7e73Pierre Ossman * The specification states that the block count register must 920c9b74c5b8fb807187f6b1db09012828fcd2d7e73Pierre Ossman * be updated, but it does not specify at what point in the 921c9b74c5b8fb807187f6b1db09012828fcd2d7e73Pierre Ossman * data flow. That makes the register entirely useless to read 922c9b74c5b8fb807187f6b1db09012828fcd2d7e73Pierre Ossman * back so we have to assume that nothing made it to the card 923c9b74c5b8fb807187f6b1db09012828fcd2d7e73Pierre Ossman * in the event of an error. 924d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman */ 925c9b74c5b8fb807187f6b1db09012828fcd2d7e73Pierre Ossman if (data->error) 926c9b74c5b8fb807187f6b1db09012828fcd2d7e73Pierre Ossman data->bytes_xfered = 0; 927d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman else 928c9b74c5b8fb807187f6b1db09012828fcd2d7e73Pierre Ossman data->bytes_xfered = data->blksz * data->blocks; 929d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 930e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin /* 931e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin * Need to send CMD12 if - 932e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin * a) open-ended multiblock transfer (no CMD23) 933e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin * b) error in multiblock transfer 934e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin */ 935e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin if (data->stop && 936e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin (data->error || 937e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin !host->mrq->sbc)) { 938e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin 939d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman /* 940d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * The controller needs a reset of internal state machines 941d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * upon error conditions. 942d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman */ 94317b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman if (data->error) { 944d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_reset(host, SDHCI_RESET_CMD); 945d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_reset(host, SDHCI_RESET_DATA); 946d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 947d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 948d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_send_command(host, data->stop); 949d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } else 950d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman tasklet_schedule(&host->finish_tasklet); 951d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 952d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 953d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd) 954d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 955d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman int flags; 956fd2208d7c72ef5995b730f1e23b082261499e334Pierre Ossman u32 mask; 9577cb2c76fa2251474e42d55b75163c9d7ed11741ePierre Ossman unsigned long timeout; 958d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 959d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman WARN_ON(host->cmd); 960d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 961d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman /* Wait max 10 ms */ 9627cb2c76fa2251474e42d55b75163c9d7ed11741ePierre Ossman timeout = 10; 963fd2208d7c72ef5995b730f1e23b082261499e334Pierre Ossman 964fd2208d7c72ef5995b730f1e23b082261499e334Pierre Ossman mask = SDHCI_CMD_INHIBIT; 965fd2208d7c72ef5995b730f1e23b082261499e334Pierre Ossman if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY)) 966fd2208d7c72ef5995b730f1e23b082261499e334Pierre Ossman mask |= SDHCI_DATA_INHIBIT; 967fd2208d7c72ef5995b730f1e23b082261499e334Pierre Ossman 968fd2208d7c72ef5995b730f1e23b082261499e334Pierre Ossman /* We shouldn't wait for data inihibit for stop commands, even 969fd2208d7c72ef5995b730f1e23b082261499e334Pierre Ossman though they might use busy signaling */ 970fd2208d7c72ef5995b730f1e23b082261499e334Pierre Ossman if (host->mrq->data && (cmd == host->mrq->data->stop)) 971fd2208d7c72ef5995b730f1e23b082261499e334Pierre Ossman mask &= ~SDHCI_DATA_INHIBIT; 972fd2208d7c72ef5995b730f1e23b082261499e334Pierre Ossman 9734e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) { 9747cb2c76fa2251474e42d55b75163c9d7ed11741ePierre Ossman if (timeout == 0) { 975a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Controller never released " 976acf1da4522add3771f4851c09c7fe6bcf1dd6636Pierre Ossman "inhibit bit(s).\n", mmc_hostname(host->mmc)); 977d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_dumpregs(host); 97817b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman cmd->error = -EIO; 979d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman tasklet_schedule(&host->finish_tasklet); 980d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman return; 981d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 9827cb2c76fa2251474e42d55b75163c9d7ed11741ePierre Ossman timeout--; 9837cb2c76fa2251474e42d55b75163c9d7ed11741ePierre Ossman mdelay(1); 9847cb2c76fa2251474e42d55b75163c9d7ed11741ePierre Ossman } 985d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 986d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman mod_timer(&host->timer, jiffies + 10 * HZ); 987d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 988d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host->cmd = cmd; 989d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 990a3c7778f8153b9e4eceea6738973280b9e63c618Andrei Warkentin sdhci_prepare_data(host, cmd); 991d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 9924e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writel(host, cmd->arg, SDHCI_ARGUMENT); 993d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 994e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin sdhci_set_transfer_mode(host, cmd); 995c7fa9963ee6317b54e85b260791d603ea2feb8e3Pierre Ossman 996d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) { 997a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Unsupported response type!\n", 998d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman mmc_hostname(host->mmc)); 99917b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman cmd->error = -EINVAL; 1000d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman tasklet_schedule(&host->finish_tasklet); 1001d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman return; 1002d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 1003d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1004d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (!(cmd->flags & MMC_RSP_PRESENT)) 1005d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman flags = SDHCI_CMD_RESP_NONE; 1006d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman else if (cmd->flags & MMC_RSP_136) 1007d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman flags = SDHCI_CMD_RESP_LONG; 1008d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman else if (cmd->flags & MMC_RSP_BUSY) 1009d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman flags = SDHCI_CMD_RESP_SHORT_BUSY; 1010d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman else 1011d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman flags = SDHCI_CMD_RESP_SHORT; 1012d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1013d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (cmd->flags & MMC_RSP_CRC) 1014d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman flags |= SDHCI_CMD_CRC; 1015d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (cmd->flags & MMC_RSP_OPCODE) 1016d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman flags |= SDHCI_CMD_INDEX; 1017b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1018b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath /* CMD19 is special in that the Data Present Select should be set */ 1019b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath if (cmd->data || (cmd->opcode == MMC_SEND_TUNING_BLOCK)) 1020d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman flags |= SDHCI_CMD_DATA; 1021d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 10224e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writew(host, SDHCI_MAKE_CMD(cmd->opcode, flags), SDHCI_COMMAND); 1023d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 1024d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1025d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_finish_command(struct sdhci_host *host) 1026d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 1027d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman int i; 1028d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1029d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman BUG_ON(host->cmd == NULL); 1030d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1031d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (host->cmd->flags & MMC_RSP_PRESENT) { 1032d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (host->cmd->flags & MMC_RSP_136) { 1033d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman /* CRC is stripped so we need to do some shifting. */ 1034d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman for (i = 0;i < 4;i++) { 10354e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov host->cmd->resp[i] = sdhci_readl(host, 1036d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman SDHCI_RESPONSE + (3-i)*4) << 8; 1037d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (i != 3) 1038d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host->cmd->resp[i] |= 10394e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_readb(host, 1040d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman SDHCI_RESPONSE + (3-i)*4-1); 1041d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 1042d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } else { 10434e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov host->cmd->resp[0] = sdhci_readl(host, SDHCI_RESPONSE); 1044d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 1045d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 1046d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 104717b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman host->cmd->error = 0; 1048d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1049e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin /* Finished CMD23, now send actual command. */ 1050e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin if (host->cmd == host->mrq->sbc) { 1051e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin host->cmd = NULL; 1052e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin sdhci_send_command(host, host->mrq->cmd); 1053e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin } else { 1054e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman 1055e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin /* Processed actual command. */ 1056e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin if (host->data && host->data_early) 1057e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin sdhci_finish_data(host); 1058d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1059e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin if (!host->cmd->data) 1060e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin tasklet_schedule(&host->finish_tasklet); 1061e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin 1062e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin host->cmd = NULL; 1063e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin } 1064d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 1065d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1066d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_set_clock(struct sdhci_host *host, unsigned int clock) 1067d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 1068c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath int div = 0; /* Initialized for compiler warning */ 1069df16219f365f7f5a2d88a6e123251d57255cca3fGiuseppe CAVALLARO int real_div = div, clk_mul = 1; 1070c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath u16 clk = 0; 10717cb2c76fa2251474e42d55b75163c9d7ed11741ePierre Ossman unsigned long timeout; 1072d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1073d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (clock == host->clock) 1074d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman return; 1075d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1076df16219f365f7f5a2d88a6e123251d57255cca3fGiuseppe CAVALLARO host->mmc->actual_clock = 0; 1077df16219f365f7f5a2d88a6e123251d57255cca3fGiuseppe CAVALLARO 10788114634ccb54d67a8c01e5825d95bff4e7f7b357Anton Vorontsov if (host->ops->set_clock) { 10798114634ccb54d67a8c01e5825d95bff4e7f7b357Anton Vorontsov host->ops->set_clock(host, clock); 10808114634ccb54d67a8c01e5825d95bff4e7f7b357Anton Vorontsov if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) 10818114634ccb54d67a8c01e5825d95bff4e7f7b357Anton Vorontsov return; 10828114634ccb54d67a8c01e5825d95bff4e7f7b357Anton Vorontsov } 10838114634ccb54d67a8c01e5825d95bff4e7f7b357Anton Vorontsov 10844e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); 1085d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1086d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (clock == 0) 1087d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman goto out; 1088d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 108985105c53b0ce70a277160379f9d89309cefc0bfdZhangfei Gao if (host->version >= SDHCI_SPEC_300) { 1090c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath /* 1091c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * Check if the Host Controller supports Programmable Clock 1092c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * Mode. 1093c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath */ 1094c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath if (host->clk_mul) { 1095c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath u16 ctrl; 1096c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath 1097c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath /* 1098c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * We need to figure out whether the Host Driver needs 1099c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * to select Programmable Clock Mode, or the value can 1100c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * be set automatically by the Host Controller based on 1101c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * the Preset Value registers. 1102c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath */ 1103c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); 1104c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath if (!(ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) { 1105c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath for (div = 1; div <= 1024; div++) { 1106c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath if (((host->max_clk * host->clk_mul) / 1107c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath div) <= clock) 1108c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath break; 1109c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath } 1110c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath /* 1111c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * Set Programmable Clock Mode in the Clock 1112c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * Control register. 1113c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath */ 1114c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath clk = SDHCI_PROG_CLOCK_MODE; 1115df16219f365f7f5a2d88a6e123251d57255cca3fGiuseppe CAVALLARO real_div = div; 1116df16219f365f7f5a2d88a6e123251d57255cca3fGiuseppe CAVALLARO clk_mul = host->clk_mul; 1117c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath div--; 1118c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath } 1119c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath } else { 1120c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath /* Version 3.00 divisors must be a multiple of 2. */ 1121c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath if (host->max_clk <= clock) 1122c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath div = 1; 1123c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath else { 1124c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath for (div = 2; div < SDHCI_MAX_DIV_SPEC_300; 1125c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath div += 2) { 1126c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath if ((host->max_clk / div) <= clock) 1127c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath break; 1128c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath } 112985105c53b0ce70a277160379f9d89309cefc0bfdZhangfei Gao } 1130df16219f365f7f5a2d88a6e123251d57255cca3fGiuseppe CAVALLARO real_div = div; 1131c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath div >>= 1; 113285105c53b0ce70a277160379f9d89309cefc0bfdZhangfei Gao } 113385105c53b0ce70a277160379f9d89309cefc0bfdZhangfei Gao } else { 113485105c53b0ce70a277160379f9d89309cefc0bfdZhangfei Gao /* Version 2.00 divisors must be a power of 2. */ 11350397526d6ae2518b6c53efd1ff1e81b7d24c91daZhangfei Gao for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) { 113685105c53b0ce70a277160379f9d89309cefc0bfdZhangfei Gao if ((host->max_clk / div) <= clock) 113785105c53b0ce70a277160379f9d89309cefc0bfdZhangfei Gao break; 113885105c53b0ce70a277160379f9d89309cefc0bfdZhangfei Gao } 1139df16219f365f7f5a2d88a6e123251d57255cca3fGiuseppe CAVALLARO real_div = div; 1140c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath div >>= 1; 1141d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 1142d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1143df16219f365f7f5a2d88a6e123251d57255cca3fGiuseppe CAVALLARO if (real_div) 1144df16219f365f7f5a2d88a6e123251d57255cca3fGiuseppe CAVALLARO host->mmc->actual_clock = (host->max_clk * clk_mul) / real_div; 1145df16219f365f7f5a2d88a6e123251d57255cca3fGiuseppe CAVALLARO 1146c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT; 114785105c53b0ce70a277160379f9d89309cefc0bfdZhangfei Gao clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN) 114885105c53b0ce70a277160379f9d89309cefc0bfdZhangfei Gao << SDHCI_DIVIDER_HI_SHIFT; 1149d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman clk |= SDHCI_CLOCK_INT_EN; 11504e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 1151d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 115227f6cb160b71b342b7a47d28a4b6c422ea74ccd1Chris Ball /* Wait max 20 ms */ 115327f6cb160b71b342b7a47d28a4b6c422ea74ccd1Chris Ball timeout = 20; 11544e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL)) 11557cb2c76fa2251474e42d55b75163c9d7ed11741ePierre Ossman & SDHCI_CLOCK_INT_STABLE)) { 11567cb2c76fa2251474e42d55b75163c9d7ed11741ePierre Ossman if (timeout == 0) { 1157a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Internal clock never " 1158acf1da4522add3771f4851c09c7fe6bcf1dd6636Pierre Ossman "stabilised.\n", mmc_hostname(host->mmc)); 1159d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_dumpregs(host); 1160d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman return; 1161d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 11627cb2c76fa2251474e42d55b75163c9d7ed11741ePierre Ossman timeout--; 11637cb2c76fa2251474e42d55b75163c9d7ed11741ePierre Ossman mdelay(1); 11647cb2c76fa2251474e42d55b75163c9d7ed11741ePierre Ossman } 1165d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1166d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman clk |= SDHCI_CLOCK_CARD_EN; 11674e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 1168d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1169d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanout: 1170d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host->clock = clock; 1171d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 1172d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1173146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossmanstatic void sdhci_set_power(struct sdhci_host *host, unsigned short power) 1174146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman{ 11758364248a829d50495a796e7561aaf9a6976f846cGiuseppe Cavallaro u8 pwr = 0; 1176146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman 11778364248a829d50495a796e7561aaf9a6976f846cGiuseppe Cavallaro if (power != (unsigned short)-1) { 1178ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman switch (1 << power) { 1179ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman case MMC_VDD_165_195: 1180ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman pwr = SDHCI_POWER_180; 1181ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman break; 1182ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman case MMC_VDD_29_30: 1183ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman case MMC_VDD_30_31: 1184ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman pwr = SDHCI_POWER_300; 1185ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman break; 1186ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman case MMC_VDD_32_33: 1187ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman case MMC_VDD_33_34: 1188ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman pwr = SDHCI_POWER_330; 1189ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman break; 1190ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman default: 1191ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman BUG(); 1192ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman } 1193ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman } 1194ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman 1195ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman if (host->pwr == pwr) 1196146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman return; 1197146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman 1198ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman host->pwr = pwr; 1199ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman 1200ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman if (pwr == 0) { 12014e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); 1202ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman return; 12039e9dc5f29f2eb65153a15c4fdb12b4382e3a75b2Darren Salt } 12049e9dc5f29f2eb65153a15c4fdb12b4382e3a75b2Darren Salt 12059e9dc5f29f2eb65153a15c4fdb12b4382e3a75b2Darren Salt /* 12069e9dc5f29f2eb65153a15c4fdb12b4382e3a75b2Darren Salt * Spec says that we should clear the power reg before setting 12079e9dc5f29f2eb65153a15c4fdb12b4382e3a75b2Darren Salt * a new value. Some controllers don't seem to like this though. 12089e9dc5f29f2eb65153a15c4fdb12b4382e3a75b2Darren Salt */ 1209b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman if (!(host->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE)) 12104e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); 1211146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman 1212e08c1694d9e2138204f2b79b73f0f159074ce2f5Andres Salomon /* 1213c71f65129a1fb67bc6b9b8d03b493675b5c9302bAndres Salomon * At least the Marvell CaFe chip gets confused if we set the voltage 1214e08c1694d9e2138204f2b79b73f0f159074ce2f5Andres Salomon * and set turn on power at the same time, so set the voltage first. 1215e08c1694d9e2138204f2b79b73f0f159074ce2f5Andres Salomon */ 121611a2f1b78a43d0c2bd026d79b952742c7588f529Pierre Ossman if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER) 1217ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); 1218e08c1694d9e2138204f2b79b73f0f159074ce2f5Andres Salomon 1219ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman pwr |= SDHCI_POWER_ON; 1220146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman 1221ae628903ab6cc9a04fdf8d4ff3f0c5b2ffa6f939Pierre Ossman sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); 1222557b06971b1f05cbadec2f376a305ee1954e9b0dHarald Welte 1223557b06971b1f05cbadec2f376a305ee1954e9b0dHarald Welte /* 1224557b06971b1f05cbadec2f376a305ee1954e9b0dHarald Welte * Some controllers need an extra 10ms delay of 10ms before they 1225557b06971b1f05cbadec2f376a305ee1954e9b0dHarald Welte * can apply clock after applying power 1226557b06971b1f05cbadec2f376a305ee1954e9b0dHarald Welte */ 122711a2f1b78a43d0c2bd026d79b952742c7588f529Pierre Ossman if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER) 1228557b06971b1f05cbadec2f376a305ee1954e9b0dHarald Welte mdelay(10); 1229146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman} 1230146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman 1231d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman/*****************************************************************************\ 1232d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 1233d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * MMC callbacks * 1234d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 1235d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman\*****************************************************************************/ 1236d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1237d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq) 1238d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 1239d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman struct sdhci_host *host; 124068d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov bool present; 1241d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman unsigned long flags; 1242d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1243d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host = mmc_priv(mmc); 1244d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 124566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_runtime_pm_get(host); 124666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 1247d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_lock_irqsave(&host->lock, flags); 1248d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1249d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman WARN_ON(host->mrq != NULL); 1250d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1251f9134319c81c6c56e0ddf38e7adac2492b243d9bPierre Ossman#ifndef SDHCI_USE_LEDS_CLASS 1252d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_activate_led(host); 12532f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman#endif 1254e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin 1255e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin /* 1256e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin * Ensure we don't send the STOP for non-SET_BLOCK_COUNTED 1257e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin * requests if Auto-CMD12 is enabled. 1258e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin */ 1259e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin if (!mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) { 1260c4512f79dcb236c8dc2afae176a0dc520096f0bcJerry Huang if (mrq->stop) { 1261c4512f79dcb236c8dc2afae176a0dc520096f0bcJerry Huang mrq->data->stop = NULL; 1262c4512f79dcb236c8dc2afae176a0dc520096f0bcJerry Huang mrq->stop = NULL; 1263c4512f79dcb236c8dc2afae176a0dc520096f0bcJerry Huang } 1264c4512f79dcb236c8dc2afae176a0dc520096f0bcJerry Huang } 1265d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1266d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host->mrq = mrq; 1267d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 126868d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov /* If polling, assume that the card is always present. */ 126968d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) 127068d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov present = true; 127168d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov else 127268d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov present = sdhci_readl(host, SDHCI_PRESENT_STATE) & 127368d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov SDHCI_CARD_PRESENT; 127468d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov 127568d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov if (!present || host->flags & SDHCI_DEVICE_DEAD) { 127617b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman host->mrq->cmd->error = -ENOMEDIUM; 1277d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman tasklet_schedule(&host->finish_tasklet); 1278cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath } else { 1279cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath u32 present_state; 1280cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 1281cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath present_state = sdhci_readl(host, SDHCI_PRESENT_STATE); 1282cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath /* 1283cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * Check if the re-tuning timer has already expired and there 1284cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * is no on-going data transfer. If so, we need to execute 1285cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * tuning procedure before sending command. 1286cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath */ 1287cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath if ((host->flags & SDHCI_NEEDS_RETUNING) && 1288cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath !(present_state & (SDHCI_DOING_WRITE | SDHCI_DOING_READ))) { 1289cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath spin_unlock_irqrestore(&host->lock, flags); 1290cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath sdhci_execute_tuning(mmc); 1291cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath spin_lock_irqsave(&host->lock, flags); 1292cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 1293cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath /* Restore original mmc_request structure */ 1294cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->mrq = mrq; 1295cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath } 1296cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 12978edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin if (mrq->sbc && !(host->flags & SDHCI_AUTO_CMD23)) 1298e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin sdhci_send_command(host, mrq->sbc); 1299e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin else 1300e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin sdhci_send_command(host, mrq->cmd); 1301cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath } 1302d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 13035f25a66f6bbac563c94af94f03491b3ae43c40afPierre Ossman mmiowb(); 1304d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_unlock_irqrestore(&host->lock, flags); 1305d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 1306d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 130766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios) 1308d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 1309d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman unsigned long flags; 1310d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman u8 ctrl; 1311d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1312d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_lock_irqsave(&host->lock, flags); 1313d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 13141e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman if (host->flags & SDHCI_DEVICE_DEAD) 13151e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman goto out; 13161e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman 1317d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman /* 1318d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * Reset the chip on each power off. 1319d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * Should clear out any weird states. 1320d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman */ 1321d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (ios->power_mode == MMC_POWER_OFF) { 13224e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE); 13237260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_reinit(host); 1324d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 1325d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1326d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_set_clock(host, ios->clock); 1327d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1328d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (ios->power_mode == MMC_POWER_OFF) 1329146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman sdhci_set_power(host, -1); 1330d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman else 1331146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman sdhci_set_power(host, ios->vdd); 1332d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1333643a81ff3c5a89ae5c0768f89b29d3e1d08be5c3Philip Rakity if (host->ops->platform_send_init_74_clocks) 1334643a81ff3c5a89ae5c0768f89b29d3e1d08be5c3Philip Rakity host->ops->platform_send_init_74_clocks(host, ios->power_mode); 1335643a81ff3c5a89ae5c0768f89b29d3e1d08be5c3Philip Rakity 133615ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity /* 133715ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity * If your platform has 8-bit width support but is not a v3 controller, 133815ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity * or if it requires special setup code, you should implement that in 133915ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity * platform_8bit_width(). 134015ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity */ 134115ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity if (host->ops->platform_8bit_width) 134215ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity host->ops->platform_8bit_width(host, ios->bus_width); 134315ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity else { 134415ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); 134515ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity if (ios->bus_width == MMC_BUS_WIDTH_8) { 134615ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity ctrl &= ~SDHCI_CTRL_4BITBUS; 134715ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity if (host->version >= SDHCI_SPEC_300) 134815ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity ctrl |= SDHCI_CTRL_8BITBUS; 134915ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity } else { 135015ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity if (host->version >= SDHCI_SPEC_300) 135115ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity ctrl &= ~SDHCI_CTRL_8BITBUS; 135215ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity if (ios->bus_width == MMC_BUS_WIDTH_4) 135315ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity ctrl |= SDHCI_CTRL_4BITBUS; 135415ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity else 135515ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity ctrl &= ~SDHCI_CTRL_4BITBUS; 135615ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity } 135715ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); 135815ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity } 1359ae6d6c92212e94b12ab9365c23fb73acc2c3c2e7Kyungmin Park 136015ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); 1361cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman 13623ab9c8dad6444007700b5949ec80cfdc823d31b4Philip Rakity if ((ios->timing == MMC_TIMING_SD_HS || 13633ab9c8dad6444007700b5949ec80cfdc823d31b4Philip Rakity ios->timing == MMC_TIMING_MMC_HS) 13643ab9c8dad6444007700b5949ec80cfdc823d31b4Philip Rakity && !(host->quirks & SDHCI_QUIRK_NO_HISPD_BIT)) 1365cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman ctrl |= SDHCI_CTRL_HISPD; 1366cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman else 1367cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman ctrl &= ~SDHCI_CTRL_HISPD; 1368cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman 1369d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath if (host->version >= SDHCI_SPEC_300) { 137049c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath u16 clk, ctrl_2; 137149c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath unsigned int clock; 137249c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath 137349c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath /* In case of UHS-I modes, set High Speed Enable */ 137449c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath if ((ios->timing == MMC_TIMING_UHS_SDR50) || 137549c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath (ios->timing == MMC_TIMING_UHS_SDR104) || 137649c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath (ios->timing == MMC_TIMING_UHS_DDR50) || 137749c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath (ios->timing == MMC_TIMING_UHS_SDR25) || 137849c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath (ios->timing == MMC_TIMING_UHS_SDR12)) 137949c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath ctrl |= SDHCI_CTRL_HISPD; 1380d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath 1381d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); 1382d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath if (!(ctrl_2 & SDHCI_CTRL_PRESET_VAL_ENABLE)) { 1383758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); 1384d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath /* 1385d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath * We only need to set Driver Strength if the 1386d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath * preset value enable is not set. 1387d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath */ 1388d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath ctrl_2 &= ~SDHCI_CTRL_DRV_TYPE_MASK; 1389d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath if (ios->drv_type == MMC_SET_DRIVER_TYPE_A) 1390d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath ctrl_2 |= SDHCI_CTRL_DRV_TYPE_A; 1391d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath else if (ios->drv_type == MMC_SET_DRIVER_TYPE_C) 1392d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath ctrl_2 |= SDHCI_CTRL_DRV_TYPE_C; 1393d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath 1394d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); 1395758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath } else { 1396758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath /* 1397758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath * According to SDHC Spec v3.00, if the Preset Value 1398758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath * Enable in the Host Control 2 register is set, we 1399758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath * need to reset SD Clock Enable before changing High 1400758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath * Speed Enable to avoid generating clock gliches. 1401758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath */ 1402758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath 1403758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath /* Reset SD Clock Enable */ 1404758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); 1405758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath clk &= ~SDHCI_CLOCK_CARD_EN; 1406758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 1407758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath 1408758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); 1409758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath 1410758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath /* Re-enable SD Clock */ 1411758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath clock = host->clock; 1412758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath host->clock = 0; 1413758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath sdhci_set_clock(host, clock); 1414d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath } 141549c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath 141649c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath 141749c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath /* Reset SD Clock Enable */ 141849c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); 141949c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath clk &= ~SDHCI_CLOCK_CARD_EN; 142049c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 142149c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath 14226322cdd0eb22e016aeced886c2046d115139c962Philip Rakity if (host->ops->set_uhs_signaling) 14236322cdd0eb22e016aeced886c2046d115139c962Philip Rakity host->ops->set_uhs_signaling(host, ios->timing); 14246322cdd0eb22e016aeced886c2046d115139c962Philip Rakity else { 14256322cdd0eb22e016aeced886c2046d115139c962Philip Rakity ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); 14266322cdd0eb22e016aeced886c2046d115139c962Philip Rakity /* Select Bus Speed Mode for host */ 14276322cdd0eb22e016aeced886c2046d115139c962Philip Rakity ctrl_2 &= ~SDHCI_CTRL_UHS_MASK; 14286322cdd0eb22e016aeced886c2046d115139c962Philip Rakity if (ios->timing == MMC_TIMING_UHS_SDR12) 14296322cdd0eb22e016aeced886c2046d115139c962Philip Rakity ctrl_2 |= SDHCI_CTRL_UHS_SDR12; 14306322cdd0eb22e016aeced886c2046d115139c962Philip Rakity else if (ios->timing == MMC_TIMING_UHS_SDR25) 14316322cdd0eb22e016aeced886c2046d115139c962Philip Rakity ctrl_2 |= SDHCI_CTRL_UHS_SDR25; 14326322cdd0eb22e016aeced886c2046d115139c962Philip Rakity else if (ios->timing == MMC_TIMING_UHS_SDR50) 14336322cdd0eb22e016aeced886c2046d115139c962Philip Rakity ctrl_2 |= SDHCI_CTRL_UHS_SDR50; 14346322cdd0eb22e016aeced886c2046d115139c962Philip Rakity else if (ios->timing == MMC_TIMING_UHS_SDR104) 14356322cdd0eb22e016aeced886c2046d115139c962Philip Rakity ctrl_2 |= SDHCI_CTRL_UHS_SDR104; 14366322cdd0eb22e016aeced886c2046d115139c962Philip Rakity else if (ios->timing == MMC_TIMING_UHS_DDR50) 14376322cdd0eb22e016aeced886c2046d115139c962Philip Rakity ctrl_2 |= SDHCI_CTRL_UHS_DDR50; 14386322cdd0eb22e016aeced886c2046d115139c962Philip Rakity sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); 14396322cdd0eb22e016aeced886c2046d115139c962Philip Rakity } 144049c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath 144149c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath /* Re-enable SD Clock */ 144249c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath clock = host->clock; 144349c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath host->clock = 0; 144449c468fcf878d2c86e31920cf54aa90c88418a66Arindam Nath sdhci_set_clock(host, clock); 1445758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath } else 1446758535c4e3cdd2b5b09565d9651aaa541aac3de8Arindam Nath sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); 1447d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath 1448b8352260d28b30cb2bb2df99814fb9c360e38901Leandro Dorileo /* 1449b8352260d28b30cb2bb2df99814fb9c360e38901Leandro Dorileo * Some (ENE) controllers go apeshit on some ios operation, 1450b8352260d28b30cb2bb2df99814fb9c360e38901Leandro Dorileo * signalling timeout and CRC errors even on CMD0. Resetting 1451b8352260d28b30cb2bb2df99814fb9c360e38901Leandro Dorileo * it on each ios seems to solve the problem. 1452b8352260d28b30cb2bb2df99814fb9c360e38901Leandro Dorileo */ 1453b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman if(host->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS) 1454b8352260d28b30cb2bb2df99814fb9c360e38901Leandro Dorileo sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); 1455b8352260d28b30cb2bb2df99814fb9c360e38901Leandro Dorileo 14561e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossmanout: 14575f25a66f6bbac563c94af94f03491b3ae43c40afPierre Ossman mmiowb(); 1458d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_unlock_irqrestore(&host->lock, flags); 1459d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 1460d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 146166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 146266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter{ 146366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter struct sdhci_host *host = mmc_priv(mmc); 146466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 146566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_runtime_pm_get(host); 146666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_do_set_ios(host, ios); 146766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_runtime_pm_put(host); 146866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter} 146966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 147066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic int sdhci_check_ro(struct sdhci_host *host) 1471d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 1472d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman unsigned long flags; 14732dfb579c7da171f6153cd58e8fbf7dcfe684778dWolfram Sang int is_readonly; 1474d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1475d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_lock_irqsave(&host->lock, flags); 1476d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 14771e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman if (host->flags & SDHCI_DEVICE_DEAD) 14782dfb579c7da171f6153cd58e8fbf7dcfe684778dWolfram Sang is_readonly = 0; 14792dfb579c7da171f6153cd58e8fbf7dcfe684778dWolfram Sang else if (host->ops->get_ro) 14802dfb579c7da171f6153cd58e8fbf7dcfe684778dWolfram Sang is_readonly = host->ops->get_ro(host); 14811e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman else 14822dfb579c7da171f6153cd58e8fbf7dcfe684778dWolfram Sang is_readonly = !(sdhci_readl(host, SDHCI_PRESENT_STATE) 14832dfb579c7da171f6153cd58e8fbf7dcfe684778dWolfram Sang & SDHCI_WRITE_PROTECT); 1484d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1485d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_unlock_irqrestore(&host->lock, flags); 1486d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 14872dfb579c7da171f6153cd58e8fbf7dcfe684778dWolfram Sang /* This quirk needs to be replaced by a callback-function later */ 14882dfb579c7da171f6153cd58e8fbf7dcfe684778dWolfram Sang return host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT ? 14892dfb579c7da171f6153cd58e8fbf7dcfe684778dWolfram Sang !is_readonly : is_readonly; 1490d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 1491d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 149282b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai#define SAMPLE_COUNT 5 149382b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai 149466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic int sdhci_do_get_ro(struct sdhci_host *host) 149582b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai{ 149682b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai int i, ro_count; 149782b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai 149882b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai if (!(host->quirks & SDHCI_QUIRK_UNSTABLE_RO_DETECT)) 149966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter return sdhci_check_ro(host); 150082b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai 150182b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai ro_count = 0; 150282b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai for (i = 0; i < SAMPLE_COUNT; i++) { 150366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (sdhci_check_ro(host)) { 150482b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai if (++ro_count > SAMPLE_COUNT / 2) 150582b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai return 1; 150682b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai } 150782b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai msleep(30); 150882b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai } 150982b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai return 0; 151082b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai} 151182b0e23a295cc58d1290017ee97a40956ad68d94Takashi Iwai 151220758b66dce76af0527363186f44b464d83e5666Adrian Hunterstatic void sdhci_hw_reset(struct mmc_host *mmc) 151320758b66dce76af0527363186f44b464d83e5666Adrian Hunter{ 151420758b66dce76af0527363186f44b464d83e5666Adrian Hunter struct sdhci_host *host = mmc_priv(mmc); 151520758b66dce76af0527363186f44b464d83e5666Adrian Hunter 151620758b66dce76af0527363186f44b464d83e5666Adrian Hunter if (host->ops && host->ops->hw_reset) 151720758b66dce76af0527363186f44b464d83e5666Adrian Hunter host->ops->hw_reset(host); 151820758b66dce76af0527363186f44b464d83e5666Adrian Hunter} 151920758b66dce76af0527363186f44b464d83e5666Adrian Hunter 152066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic int sdhci_get_ro(struct mmc_host *mmc) 1521f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman{ 152266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter struct sdhci_host *host = mmc_priv(mmc); 152366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter int ret; 1524f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman 152566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_runtime_pm_get(host); 152666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter ret = sdhci_do_get_ro(host); 152766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_runtime_pm_put(host); 152866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter return ret; 152966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter} 1530f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman 153166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic void sdhci_enable_sdio_irq_nolock(struct sdhci_host *host, int enable) 153266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter{ 15331e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman if (host->flags & SDHCI_DEVICE_DEAD) 15341e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman goto out; 15351e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman 1536f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman if (enable) 153766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->flags |= SDHCI_SDIO_IRQ_ENABLED; 153866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter else 153966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->flags &= ~SDHCI_SDIO_IRQ_ENABLED; 154066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 154166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter /* SDIO IRQ will be enabled as appropriate in runtime resume */ 154266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (host->runtime_suspended) 154366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter goto out; 154466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 154566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (enable) 15467260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_unmask_irqs(host, SDHCI_INT_CARD_INT); 15477260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov else 15487260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_mask_irqs(host, SDHCI_INT_CARD_INT); 15491e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossmanout: 1550f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman mmiowb(); 155166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter} 155266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 155366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable) 155466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter{ 155566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter struct sdhci_host *host = mmc_priv(mmc); 155666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter unsigned long flags; 1557f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman 155866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter spin_lock_irqsave(&host->lock, flags); 155966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_enable_sdio_irq_nolock(host, enable); 1560f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman spin_unlock_irqrestore(&host->lock, flags); 1561f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman} 1562f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman 156366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host, 156466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter struct mmc_ios *ios) 1565f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath{ 1566f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath u8 pwr; 1567f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath u16 clk, ctrl; 1568f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath u32 present_state; 1569f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1570f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* 1571f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * Signal Voltage Switching is only applicable for Host Controllers 1572f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * v3.00 and above. 1573f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath */ 1574f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (host->version < SDHCI_SPEC_300) 1575f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath return 0; 1576f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1577f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* 1578f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * We first check whether the request is to set signalling voltage 1579f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * to 3.3V. If so, we change the voltage to 3.3V and return quickly. 1580f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath */ 1581f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); 1582f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 1583f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* Set 1.8V Signal Enable in the Host Control2 register to 0 */ 1584f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath ctrl &= ~SDHCI_CTRL_VDD_180; 1585f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); 1586f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1587f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* Wait for 5ms */ 1588f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath usleep_range(5000, 5500); 1589f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1590f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* 3.3V regulator output should be stable within 5 ms */ 1591f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); 1592f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (!(ctrl & SDHCI_CTRL_VDD_180)) 1593f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath return 0; 1594f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath else { 1595a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_info(DRIVER_NAME ": Switching to 3.3V " 1596f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath "signalling voltage failed\n"); 1597f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath return -EIO; 1598f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath } 1599f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath } else if (!(ctrl & SDHCI_CTRL_VDD_180) && 1600f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180)) { 1601f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* Stop SDCLK */ 1602f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); 1603f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath clk &= ~SDHCI_CLOCK_CARD_EN; 1604f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 1605f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1606f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* Check whether DAT[3:0] is 0000 */ 1607f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath present_state = sdhci_readl(host, SDHCI_PRESENT_STATE); 1608f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (!((present_state & SDHCI_DATA_LVL_MASK) >> 1609f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath SDHCI_DATA_LVL_SHIFT)) { 1610f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* 1611f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * Enable 1.8V Signal Enable in the Host Control2 1612f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * register 1613f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath */ 1614f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath ctrl |= SDHCI_CTRL_VDD_180; 1615f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); 1616f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1617f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* Wait for 5ms */ 1618f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath usleep_range(5000, 5500); 1619f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1620f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); 1621f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (ctrl & SDHCI_CTRL_VDD_180) { 1622f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* Provide SDCLK again and wait for 1ms*/ 1623f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); 1624f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath clk |= SDHCI_CLOCK_CARD_EN; 1625f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 1626f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath usleep_range(1000, 1500); 1627f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1628f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* 1629f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * If DAT[3:0] level is 1111b, then the card 1630f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * was successfully switched to 1.8V signaling. 1631f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath */ 1632f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath present_state = sdhci_readl(host, 1633f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath SDHCI_PRESENT_STATE); 1634f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if ((present_state & SDHCI_DATA_LVL_MASK) == 1635f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath SDHCI_DATA_LVL_MASK) 1636f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath return 0; 1637f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath } 1638f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath } 1639f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1640f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* 1641f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * If we are here, that means the switch to 1.8V signaling 1642f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * failed. We power cycle the card, and retry initialization 1643f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * sequence by setting S18R to 0. 1644f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath */ 1645f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath pwr = sdhci_readb(host, SDHCI_POWER_CONTROL); 1646f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath pwr &= ~SDHCI_POWER_ON; 1647f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); 1648f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1649f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* Wait for 1ms as per the spec */ 1650f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath usleep_range(1000, 1500); 1651f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath pwr |= SDHCI_POWER_ON; 1652f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); 1653f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1654a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_info(DRIVER_NAME ": Switching to 1.8V signalling " 1655f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath "voltage failed, retrying with S18R set to 0\n"); 1656f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath return -EAGAIN; 1657f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath } else 1658f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* No signal voltage switch required */ 1659f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath return 0; 1660f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath} 1661f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 166266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic int sdhci_start_signal_voltage_switch(struct mmc_host *mmc, 166366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter struct mmc_ios *ios) 166466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter{ 166566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter struct sdhci_host *host = mmc_priv(mmc); 166666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter int err; 166766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 166866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (host->version < SDHCI_SPEC_300) 166966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter return 0; 167066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_runtime_pm_get(host); 167166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter err = sdhci_do_start_signal_voltage_switch(host, ios); 167266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_runtime_pm_put(host); 167366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter return err; 167466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter} 167566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 1676b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nathstatic int sdhci_execute_tuning(struct mmc_host *mmc) 1677b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath{ 1678b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath struct sdhci_host *host; 1679b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath u16 ctrl; 1680b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath u32 ier; 1681b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath int tuning_loop_counter = MAX_TUNING_LOOP; 1682b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath unsigned long timeout; 1683b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath int err = 0; 1684b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1685b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath host = mmc_priv(mmc); 1686b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 168766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_runtime_pm_get(host); 1688b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath disable_irq(host->irq); 1689b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath spin_lock(&host->lock); 1690b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1691b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); 1692b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1693b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath /* 1694b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * Host Controller needs tuning only in case of SDR104 mode 1695b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * and for SDR50 mode when Use Tuning for SDR50 is set in 1696b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * Capabilities register. 1697b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath */ 1698b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath if (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR104) || 1699b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR50) && 1700b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath (host->flags & SDHCI_SDR50_NEEDS_TUNING))) 1701b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath ctrl |= SDHCI_CTRL_EXEC_TUNING; 1702b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath else { 1703b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath spin_unlock(&host->lock); 1704b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath enable_irq(host->irq); 170566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_runtime_pm_put(host); 1706b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath return 0; 1707b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath } 1708b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1709b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); 1710b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1711b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath /* 1712b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * As per the Host Controller spec v3.00, tuning command 1713b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * generates Buffer Read Ready interrupt, so enable that. 1714b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * 1715b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * Note: The spec clearly says that when tuning sequence 1716b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * is being performed, the controller does not generate 1717b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * interrupts other than Buffer Read Ready interrupt. But 1718b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * to make sure we don't hit a controller bug, we _only_ 1719b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * enable Buffer Read Ready interrupt here. 1720b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath */ 1721b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath ier = sdhci_readl(host, SDHCI_INT_ENABLE); 1722b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath sdhci_clear_set_irqs(host, ier, SDHCI_INT_DATA_AVAIL); 1723b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1724b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath /* 1725b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * Issue CMD19 repeatedly till Execute Tuning is set to 0 or the number 1726b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * of loops reaches 40 times or a timeout of 150ms occurs. 1727b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath */ 1728b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath timeout = 150; 1729b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath do { 1730b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath struct mmc_command cmd = {0}; 173166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter struct mmc_request mrq = {NULL}; 1732b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1733b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath if (!tuning_loop_counter && !timeout) 1734b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath break; 1735b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1736b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath cmd.opcode = MMC_SEND_TUNING_BLOCK; 1737b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath cmd.arg = 0; 1738b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1739b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath cmd.retries = 0; 1740b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath cmd.data = NULL; 1741b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath cmd.error = 0; 1742b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1743b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath mrq.cmd = &cmd; 1744b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath host->mrq = &mrq; 1745b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1746b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath /* 1747b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * In response to CMD19, the card sends 64 bytes of tuning 1748b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * block to the Host Controller. So we set the block size 1749b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * to 64 here. 1750b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath */ 1751b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64), SDHCI_BLOCK_SIZE); 1752b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1753b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath /* 1754b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * The tuning block is sent by the card to the host controller. 1755b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * So we set the TRNS_READ bit in the Transfer Mode register. 1756b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * This also takes care of setting DMA Enable and Multi Block 1757b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * Select in the same register to 0. 1758b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath */ 1759b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE); 1760b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1761b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath sdhci_send_command(host, &cmd); 1762b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1763b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath host->cmd = NULL; 1764b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath host->mrq = NULL; 1765b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1766b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath spin_unlock(&host->lock); 1767b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath enable_irq(host->irq); 1768b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1769b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath /* Wait for Buffer Read Ready interrupt */ 1770b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath wait_event_interruptible_timeout(host->buf_ready_int, 1771b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath (host->tuning_done == 1), 1772b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath msecs_to_jiffies(50)); 1773b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath disable_irq(host->irq); 1774b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath spin_lock(&host->lock); 1775b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1776b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath if (!host->tuning_done) { 1777a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_info(DRIVER_NAME ": Timeout waiting for " 1778b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath "Buffer Read Ready interrupt during tuning " 1779b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath "procedure, falling back to fixed sampling " 1780b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath "clock\n"); 1781b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); 1782b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath ctrl &= ~SDHCI_CTRL_TUNED_CLK; 1783b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath ctrl &= ~SDHCI_CTRL_EXEC_TUNING; 1784b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); 1785b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1786b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath err = -EIO; 1787b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath goto out; 1788b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath } 1789b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1790b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath host->tuning_done = 0; 1791b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1792b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); 1793b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath tuning_loop_counter--; 1794b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath timeout--; 1795b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath mdelay(1); 1796b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath } while (ctrl & SDHCI_CTRL_EXEC_TUNING); 1797b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1798b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath /* 1799b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * The Host Driver has exhausted the maximum number of loops allowed, 1800b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath * so use fixed sampling frequency. 1801b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath */ 1802b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath if (!tuning_loop_counter || !timeout) { 1803b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath ctrl &= ~SDHCI_CTRL_TUNED_CLK; 1804b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); 1805b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath } else { 1806b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) { 1807a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_info(DRIVER_NAME ": Tuning procedure" 1808b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath " failed, falling back to fixed sampling" 1809b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath " clock\n"); 1810b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath err = -EIO; 1811b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath } 1812b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath } 1813b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1814b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nathout: 1815cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath /* 1816cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * If this is the very first time we are here, we start the retuning 1817cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * timer. Since only during the first time, SDHCI_NEEDS_RETUNING 1818cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * flag won't be set, we check this condition before actually starting 1819cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * the timer. 1820cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath */ 1821cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath if (!(host->flags & SDHCI_NEEDS_RETUNING) && host->tuning_count && 1822cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath (host->tuning_mode == SDHCI_TUNING_MODE_1)) { 1823cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath mod_timer(&host->tuning_timer, jiffies + 1824cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->tuning_count * HZ); 1825cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath /* Tuning mode 1 limits the maximum data length to 4MB */ 1826cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath mmc->max_blk_count = (4 * 1024 * 1024) / mmc->max_blk_size; 1827cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath } else { 1828cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->flags &= ~SDHCI_NEEDS_RETUNING; 1829cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath /* Reload the new initial value for timer */ 1830cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath if (host->tuning_mode == SDHCI_TUNING_MODE_1) 1831cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath mod_timer(&host->tuning_timer, jiffies + 1832cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->tuning_count * HZ); 1833cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath } 1834cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 1835cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath /* 1836cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * In case tuning fails, host controllers which support re-tuning can 1837cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * try tuning again at a later time, when the re-tuning timer expires. 1838cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * So for these controllers, we return 0. Since there might be other 1839cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * controllers who do not have this capability, we return error for 1840cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * them. 1841cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath */ 1842cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath if (err && host->tuning_count && 1843cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->tuning_mode == SDHCI_TUNING_MODE_1) 1844cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath err = 0; 1845cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 1846b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath sdhci_clear_set_irqs(host, SDHCI_INT_DATA_AVAIL, ier); 1847b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath spin_unlock(&host->lock); 1848b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath enable_irq(host->irq); 184966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_runtime_pm_put(host); 1850b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 1851b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath return err; 1852b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath} 1853b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 185466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic void sdhci_do_enable_preset_value(struct sdhci_host *host, bool enable) 18554d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath{ 18564d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath u16 ctrl; 18574d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath unsigned long flags; 18584d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath 18594d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath /* Host Controller v3.00 defines preset value registers */ 18604d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath if (host->version < SDHCI_SPEC_300) 18614d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath return; 18624d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath 18634d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath spin_lock_irqsave(&host->lock, flags); 18644d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath 18654d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); 18664d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath 18674d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath /* 18684d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath * We only enable or disable Preset Value if they are not already 18694d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath * enabled or disabled respectively. Otherwise, we bail out. 18704d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath */ 18714d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath if (enable && !(ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) { 18724d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath ctrl |= SDHCI_CTRL_PRESET_VAL_ENABLE; 18734d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); 187466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->flags |= SDHCI_PV_ENABLED; 18754d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath } else if (!enable && (ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) { 18764d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath ctrl &= ~SDHCI_CTRL_PRESET_VAL_ENABLE; 18774d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); 187866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->flags &= ~SDHCI_PV_ENABLED; 18794d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath } 18804d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath 18814d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath spin_unlock_irqrestore(&host->lock, flags); 18824d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath} 18834d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath 188466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic void sdhci_enable_preset_value(struct mmc_host *mmc, bool enable) 188566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter{ 188666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter struct sdhci_host *host = mmc_priv(mmc); 188766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 188866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_runtime_pm_get(host); 188966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_do_enable_preset_value(host, enable); 189066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_runtime_pm_put(host); 189166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter} 189266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 1893ab7aefd0b38297e6d2d71f43e8f81f9f4a36cdaeDavid Brownellstatic const struct mmc_host_ops sdhci_ops = { 1894d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman .request = sdhci_request, 1895d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman .set_ios = sdhci_set_ios, 1896d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman .get_ro = sdhci_get_ro, 189720758b66dce76af0527363186f44b464d83e5666Adrian Hunter .hw_reset = sdhci_hw_reset, 1898f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman .enable_sdio_irq = sdhci_enable_sdio_irq, 1899f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath .start_signal_voltage_switch = sdhci_start_signal_voltage_switch, 1900b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath .execute_tuning = sdhci_execute_tuning, 19014d55c5a13a189a80d40383f02c8026f9a87d7c87Arindam Nath .enable_preset_value = sdhci_enable_preset_value, 1902d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman}; 1903d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1904d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman/*****************************************************************************\ 1905d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 1906d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * Tasklets * 1907d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 1908d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman\*****************************************************************************/ 1909d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1910d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_tasklet_card(unsigned long param) 1911d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 1912d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman struct sdhci_host *host; 1913d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman unsigned long flags; 1914d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1915d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host = (struct sdhci_host*)param; 1916d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1917d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_lock_irqsave(&host->lock, flags); 1918d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 191966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter /* Check host->mrq first in case we are runtime suspended */ 192066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (host->mrq && 192166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter !(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) { 1922a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Card removed during transfer!\n", 192366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter mmc_hostname(host->mmc)); 1924a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Resetting controller.\n", 192566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter mmc_hostname(host->mmc)); 1926d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 192766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_reset(host, SDHCI_RESET_CMD); 192866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_reset(host, SDHCI_RESET_DATA); 1929d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 193066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->mrq->cmd->error = -ENOMEDIUM; 193166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter tasklet_schedule(&host->finish_tasklet); 1932d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 1933d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1934d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_unlock_irqrestore(&host->lock, flags); 1935d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 193604cf585d2902404ed06861c6dc27897100340dbaPierre Ossman mmc_detect_change(host->mmc, msecs_to_jiffies(200)); 1937d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 1938d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1939d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_tasklet_finish(unsigned long param) 1940d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 1941d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman struct sdhci_host *host; 1942d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman unsigned long flags; 1943d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman struct mmc_request *mrq; 1944d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1945d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host = (struct sdhci_host*)param; 1946d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 194766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter spin_lock_irqsave(&host->lock, flags); 194866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 19490c9c99a765321104cc5f9c97f949382a9ba4927eChris Ball /* 19500c9c99a765321104cc5f9c97f949382a9ba4927eChris Ball * If this tasklet gets rescheduled while running, it will 19510c9c99a765321104cc5f9c97f949382a9ba4927eChris Ball * be run again afterwards but without any active request. 19520c9c99a765321104cc5f9c97f949382a9ba4927eChris Ball */ 195366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (!host->mrq) { 195466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter spin_unlock_irqrestore(&host->lock, flags); 19550c9c99a765321104cc5f9c97f949382a9ba4927eChris Ball return; 195666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter } 1957d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1958d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman del_timer(&host->timer); 1959d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1960d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman mrq = host->mrq; 1961d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1962d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman /* 1963d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * The controller needs a reset of internal state machines 1964d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * upon error conditions. 1965d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman */ 19661e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman if (!(host->flags & SDHCI_DEVICE_DEAD) && 1967b7b4d3426d2b5ecab21578eb20d8e456a1aace8fBen Dooks ((mrq->cmd && mrq->cmd->error) || 19681e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman (mrq->data && (mrq->data->error || 19691e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman (mrq->data->stop && mrq->data->stop->error))) || 19701e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman (host->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) { 1971645289dca5021224279e67b4655796cafdfdad00Pierre Ossman 1972645289dca5021224279e67b4655796cafdfdad00Pierre Ossman /* Some controllers need this kick or reset won't work here */ 1973b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman if (host->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) { 1974645289dca5021224279e67b4655796cafdfdad00Pierre Ossman unsigned int clock; 1975645289dca5021224279e67b4655796cafdfdad00Pierre Ossman 1976645289dca5021224279e67b4655796cafdfdad00Pierre Ossman /* This is to force an update */ 1977645289dca5021224279e67b4655796cafdfdad00Pierre Ossman clock = host->clock; 1978645289dca5021224279e67b4655796cafdfdad00Pierre Ossman host->clock = 0; 1979645289dca5021224279e67b4655796cafdfdad00Pierre Ossman sdhci_set_clock(host, clock); 1980645289dca5021224279e67b4655796cafdfdad00Pierre Ossman } 1981645289dca5021224279e67b4655796cafdfdad00Pierre Ossman 1982645289dca5021224279e67b4655796cafdfdad00Pierre Ossman /* Spec says we should do both at the same time, but Ricoh 1983645289dca5021224279e67b4655796cafdfdad00Pierre Ossman controllers do not like that. */ 1984d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_reset(host, SDHCI_RESET_CMD); 1985d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_reset(host, SDHCI_RESET_DATA); 1986d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 1987d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1988d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host->mrq = NULL; 1989d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host->cmd = NULL; 1990d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host->data = NULL; 1991d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1992f9134319c81c6c56e0ddf38e7adac2492b243d9bPierre Ossman#ifndef SDHCI_USE_LEDS_CLASS 1993d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_deactivate_led(host); 19942f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman#endif 1995d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 19965f25a66f6bbac563c94af94f03491b3ae43c40afPierre Ossman mmiowb(); 1997d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_unlock_irqrestore(&host->lock, flags); 1998d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 1999d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman mmc_request_done(host->mmc, mrq); 200066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_runtime_pm_put(host); 2001d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 2002d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2003d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_timeout_timer(unsigned long data) 2004d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 2005d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman struct sdhci_host *host; 2006d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman unsigned long flags; 2007d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2008d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host = (struct sdhci_host*)data; 2009d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2010d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_lock_irqsave(&host->lock, flags); 2011d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2012d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (host->mrq) { 2013a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Timeout waiting for hardware " 2014acf1da4522add3771f4851c09c7fe6bcf1dd6636Pierre Ossman "interrupt.\n", mmc_hostname(host->mmc)); 2015d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_dumpregs(host); 2016d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2017d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (host->data) { 201817b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman host->data->error = -ETIMEDOUT; 2019d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_finish_data(host); 2020d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } else { 2021d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (host->cmd) 202217b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman host->cmd->error = -ETIMEDOUT; 2023d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman else 202417b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman host->mrq->cmd->error = -ETIMEDOUT; 2025d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2026d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman tasklet_schedule(&host->finish_tasklet); 2027d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 2028d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 2029d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 20305f25a66f6bbac563c94af94f03491b3ae43c40afPierre Ossman mmiowb(); 2031d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_unlock_irqrestore(&host->lock, flags); 2032d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 2033d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2034cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nathstatic void sdhci_tuning_timer(unsigned long data) 2035cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath{ 2036cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath struct sdhci_host *host; 2037cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath unsigned long flags; 2038cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 2039cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host = (struct sdhci_host *)data; 2040cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 2041cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath spin_lock_irqsave(&host->lock, flags); 2042cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 2043cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->flags |= SDHCI_NEEDS_RETUNING; 2044cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 2045cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath spin_unlock_irqrestore(&host->lock, flags); 2046cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath} 2047cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 2048d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman/*****************************************************************************\ 2049d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 2050d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * Interrupt handling * 2051d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 2052d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman\*****************************************************************************/ 2053d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2054d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask) 2055d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 2056d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman BUG_ON(intmask == 0); 2057d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2058d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (!host->cmd) { 2059a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Got command interrupt 0x%08x even " 2060b67ac3f339c76dfea3cc75fc0285b6d13edc35faPierre Ossman "though no command operation was in progress.\n", 2061b67ac3f339c76dfea3cc75fc0285b6d13edc35faPierre Ossman mmc_hostname(host->mmc), (unsigned)intmask); 2062d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_dumpregs(host); 2063d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman return; 2064d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 2065d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 206643b58b36b7e6554b8a96be6b9f63542c583c06e5Pierre Ossman if (intmask & SDHCI_INT_TIMEOUT) 206717b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman host->cmd->error = -ETIMEDOUT; 206817b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman else if (intmask & (SDHCI_INT_CRC | SDHCI_INT_END_BIT | 206917b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman SDHCI_INT_INDEX)) 207017b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman host->cmd->error = -EILSEQ; 207143b58b36b7e6554b8a96be6b9f63542c583c06e5Pierre Ossman 2072e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman if (host->cmd->error) { 2073d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman tasklet_schedule(&host->finish_tasklet); 2074e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman return; 2075e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman } 2076e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman 2077e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman /* 2078e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman * The host can send and interrupt when the busy state has 2079e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman * ended, allowing us to wait without wasting CPU cycles. 2080e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman * Unfortunately this is overloaded on the "data complete" 2081e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman * interrupt, so we need to take some care when handling 2082e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman * it. 2083e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman * 2084e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman * Note: The 1.0 specification is a bit ambiguous about this 2085e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman * feature so there might be some problems with older 2086e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman * controllers. 2087e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman */ 2088e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman if (host->cmd->flags & MMC_RSP_BUSY) { 2089e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman if (host->cmd->data) 2090e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman DBG("Cannot wait for busy signal when also " 2091e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman "doing a data transfer"); 2092f945405cdecd9e0ae3e58ff84cabd19b4522965eBen Dooks else if (!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ)) 2093e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman return; 2094f945405cdecd9e0ae3e58ff84cabd19b4522965eBen Dooks 2095f945405cdecd9e0ae3e58ff84cabd19b4522965eBen Dooks /* The controller does not support the end-of-busy IRQ, 2096f945405cdecd9e0ae3e58ff84cabd19b4522965eBen Dooks * fall through and take the SDHCI_INT_RESPONSE */ 2097e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman } 2098e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman 2099e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman if (intmask & SDHCI_INT_RESPONSE) 210043b58b36b7e6554b8a96be6b9f63542c583c06e5Pierre Ossman sdhci_finish_command(host); 2101d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 2102d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 21030957c3339efa333b7895157eb18b9b578394f80cGeorge G. Davis#ifdef CONFIG_MMC_DEBUG 21046882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooksstatic void sdhci_show_adma_error(struct sdhci_host *host) 21056882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks{ 21066882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks const char *name = mmc_hostname(host->mmc); 21076882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks u8 *desc = host->adma_desc; 21086882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks __le32 *dma; 21096882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks __le16 *len; 21106882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks u8 attr; 21116882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks 21126882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks sdhci_dumpregs(host); 21136882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks 21146882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks while (true) { 21156882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks dma = (__le32 *)(desc + 4); 21166882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks len = (__le16 *)(desc + 2); 21176882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks attr = *desc; 21186882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks 21196882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks DBG("%s: %p: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n", 21206882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks name, desc, le32_to_cpu(*dma), le16_to_cpu(*len), attr); 21216882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks 21226882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks desc += 8; 21236882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks 21246882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks if (attr & 2) 21256882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks break; 21266882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks } 21276882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks} 21286882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks#else 21296882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooksstatic void sdhci_show_adma_error(struct sdhci_host *host) { } 21306882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks#endif 21316882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks 2132d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void sdhci_data_irq(struct sdhci_host *host, u32 intmask) 2133d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 2134d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman BUG_ON(intmask == 0); 2135d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2136b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath /* CMD19 generates _only_ Buffer Read Ready interrupt */ 2137b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath if (intmask & SDHCI_INT_DATA_AVAIL) { 2138b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath if (SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND)) == 2139b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath MMC_SEND_TUNING_BLOCK) { 2140b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath host->tuning_done = 1; 2141b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath wake_up(&host->buf_ready_int); 2142b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath return; 2143b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath } 2144b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath } 2145b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 2146d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (!host->data) { 2147d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman /* 2148e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman * The "data complete" interrupt is also used to 2149e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman * indicate that a busy state has ended. See comment 2150e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman * above in sdhci_cmd_irq(). 2151d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman */ 2152e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman if (host->cmd && (host->cmd->flags & MMC_RSP_BUSY)) { 2153e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman if (intmask & SDHCI_INT_DATA_END) { 2154e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman sdhci_finish_command(host); 2155e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman return; 2156e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman } 2157e809517f6fa5803a5a1cd56026f0e2190fc13d5cPierre Ossman } 2158d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2159a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Got data interrupt 0x%08x even " 2160b67ac3f339c76dfea3cc75fc0285b6d13edc35faPierre Ossman "though no data operation was in progress.\n", 2161b67ac3f339c76dfea3cc75fc0285b6d13edc35faPierre Ossman mmc_hostname(host->mmc), (unsigned)intmask); 2162d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_dumpregs(host); 2163d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2164d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman return; 2165d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 2166d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2167d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (intmask & SDHCI_INT_DATA_TIMEOUT) 216817b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman host->data->error = -ETIMEDOUT; 216922113efd00491310da802f3b1a9a66cfcf415facAries Lee else if (intmask & SDHCI_INT_DATA_END_BIT) 217022113efd00491310da802f3b1a9a66cfcf415facAries Lee host->data->error = -EILSEQ; 217122113efd00491310da802f3b1a9a66cfcf415facAries Lee else if ((intmask & SDHCI_INT_DATA_CRC) && 217222113efd00491310da802f3b1a9a66cfcf415facAries Lee SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND)) 217322113efd00491310da802f3b1a9a66cfcf415facAries Lee != MMC_BUS_TEST_R) 217417b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman host->data->error = -EILSEQ; 21756882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks else if (intmask & SDHCI_INT_ADMA_ERROR) { 2176a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: ADMA error\n", mmc_hostname(host->mmc)); 21776882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks sdhci_show_adma_error(host); 21782134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->data->error = -EIO; 21796882a8c071d609f4c088bee41e79572c7cfc1790Ben Dooks } 2180d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 218117b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman if (host->data->error) 2182d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_finish_data(host); 2183d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman else { 2184a406f5a3b68ee1db2306a2ba1c9b00dbd3505d05Pierre Ossman if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL)) 2185d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_transfer_pio(host); 2186d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 21876ba736a10e4ae63b38ccfee9f22b3263a6e5d050Pierre Ossman /* 21886ba736a10e4ae63b38ccfee9f22b3263a6e5d050Pierre Ossman * We currently don't do anything fancy with DMA 21896ba736a10e4ae63b38ccfee9f22b3263a6e5d050Pierre Ossman * boundaries, but as we can't disable the feature 21906ba736a10e4ae63b38ccfee9f22b3263a6e5d050Pierre Ossman * we need to at least restart the transfer. 2191f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni * 2192f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni * According to the spec sdhci_readl(host, SDHCI_DMA_ADDRESS) 2193f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni * should return a valid address to continue from, but as 2194f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni * some controllers are faulty, don't trust them. 21956ba736a10e4ae63b38ccfee9f22b3263a6e5d050Pierre Ossman */ 2196f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni if (intmask & SDHCI_INT_DMA_END) { 2197f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni u32 dmastart, dmanow; 2198f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni dmastart = sg_dma_address(host->data->sg); 2199f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni dmanow = dmastart + host->data->bytes_xfered; 2200f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni /* 2201f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni * Force update to the next DMA block boundary. 2202f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni */ 2203f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni dmanow = (dmanow & 2204f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) + 2205f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni SDHCI_DEFAULT_BOUNDARY_SIZE; 2206f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni host->data->bytes_xfered = dmanow - dmastart; 2207f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni DBG("%s: DMA base 0x%08x, transferred 0x%06x bytes," 2208f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni " next 0x%08x\n", 2209f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni mmc_hostname(host->mmc), dmastart, 2210f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni host->data->bytes_xfered, dmanow); 2211f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS); 2212f6a03cbf43e586211f8ea088148c8ecd3fc4b5beMikko Vinni } 22136ba736a10e4ae63b38ccfee9f22b3263a6e5d050Pierre Ossman 2214e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman if (intmask & SDHCI_INT_DATA_END) { 2215e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman if (host->cmd) { 2216e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman /* 2217e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman * Data managed to finish before the 2218e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman * command completed. Make sure we do 2219e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman * things in the proper order. 2220e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman */ 2221e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman host->data_early = 1; 2222e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman } else { 2223e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman sdhci_finish_data(host); 2224e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman } 2225e538fbe83e374a3521128c1f4642aca037661c9dPierre Ossman } 2226d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 2227d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 2228d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 22297d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsstatic irqreturn_t sdhci_irq(int irq, void *dev_id) 2230d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 2231d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman irqreturn_t result; 223266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter struct sdhci_host *host = dev_id; 2233d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman u32 intmask; 2234f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman int cardint = 0; 2235d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2236d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_lock(&host->lock); 2237d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 223866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (host->runtime_suspended) { 223966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter spin_unlock(&host->lock); 2240a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_warning("%s: got irq while runtime suspended\n", 224166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter mmc_hostname(host->mmc)); 224266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter return IRQ_HANDLED; 224366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter } 224466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 22454e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov intmask = sdhci_readl(host, SDHCI_INT_STATUS); 2246d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 224762df67a523acd7a22d936bf946b1889dbd60ca98Mark Lord if (!intmask || intmask == 0xffffffff) { 2248d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman result = IRQ_NONE; 2249d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman goto out; 2250d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 2251d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2252b69c9058907642f8e1b32076906755c6623ea060Pierre Ossman DBG("*** %s got interrupt: 0x%08x\n", 2253b69c9058907642f8e1b32076906755c6623ea060Pierre Ossman mmc_hostname(host->mmc), intmask); 2254d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 22553192a28f7d34ea8f1d0fef8ca5bc0314b5b5bb19Pierre Ossman if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) { 2256d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo u32 present = sdhci_readl(host, SDHCI_PRESENT_STATE) & 2257d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo SDHCI_CARD_PRESENT; 2258d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo 2259d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo /* 2260d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo * There is a observation on i.mx esdhc. INSERT bit will be 2261d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo * immediately set again when it gets cleared, if a card is 2262d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo * inserted. We have to mask the irq to prevent interrupt 2263d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo * storm which will freeze the system. And the REMOVE gets 2264d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo * the same situation. 2265d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo * 2266d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo * More testing are needed here to ensure it works for other 2267d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo * platforms though. 2268d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo */ 2269d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo sdhci_mask_irqs(host, present ? SDHCI_INT_CARD_INSERT : 2270d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo SDHCI_INT_CARD_REMOVE); 2271d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo sdhci_unmask_irqs(host, present ? SDHCI_INT_CARD_REMOVE : 2272d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo SDHCI_INT_CARD_INSERT); 2273d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo 22744e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writel(host, intmask & (SDHCI_INT_CARD_INSERT | 2275d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo SDHCI_INT_CARD_REMOVE), SDHCI_INT_STATUS); 2276d25928d1eed06a9c23c723466dfa7cbee0a5e07dShawn Guo intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE); 2277d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman tasklet_schedule(&host->card_tasklet); 22783192a28f7d34ea8f1d0fef8ca5bc0314b5b5bb19Pierre Ossman } 2279d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 22803192a28f7d34ea8f1d0fef8ca5bc0314b5b5bb19Pierre Ossman if (intmask & SDHCI_INT_CMD_MASK) { 22814e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writel(host, intmask & SDHCI_INT_CMD_MASK, 22824e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov SDHCI_INT_STATUS); 22833192a28f7d34ea8f1d0fef8ca5bc0314b5b5bb19Pierre Ossman sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK); 2284d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 2285d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2286d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (intmask & SDHCI_INT_DATA_MASK) { 22874e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writel(host, intmask & SDHCI_INT_DATA_MASK, 22884e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov SDHCI_INT_STATUS); 22893192a28f7d34ea8f1d0fef8ca5bc0314b5b5bb19Pierre Ossman sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK); 2290d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 2291d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2292d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK); 2293d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2294964f9ce2ff42dc47cf40fbd2f5c81cd60689e384Pierre Ossman intmask &= ~SDHCI_INT_ERROR; 2295964f9ce2ff42dc47cf40fbd2f5c81cd60689e384Pierre Ossman 2296d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (intmask & SDHCI_INT_BUS_POWER) { 2297a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Card is consuming too much power!\n", 2298d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman mmc_hostname(host->mmc)); 22994e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writel(host, SDHCI_INT_BUS_POWER, SDHCI_INT_STATUS); 2300d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 2301d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 23029d26a5d3f2b9c4fe4b2ba491683c6989ecd6ae04Rolf Eike Beer intmask &= ~SDHCI_INT_BUS_POWER; 23033192a28f7d34ea8f1d0fef8ca5bc0314b5b5bb19Pierre Ossman 2304f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman if (intmask & SDHCI_INT_CARD_INT) 2305f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman cardint = 1; 2306f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman 2307f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman intmask &= ~SDHCI_INT_CARD_INT; 2308f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman 23093192a28f7d34ea8f1d0fef8ca5bc0314b5b5bb19Pierre Ossman if (intmask) { 2310a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Unexpected interrupt 0x%08x.\n", 23113192a28f7d34ea8f1d0fef8ca5bc0314b5b5bb19Pierre Ossman mmc_hostname(host->mmc), intmask); 2312d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_dumpregs(host); 2313d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 23144e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov sdhci_writel(host, intmask, SDHCI_INT_STATUS); 23153192a28f7d34ea8f1d0fef8ca5bc0314b5b5bb19Pierre Ossman } 2316d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2317d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman result = IRQ_HANDLED; 2318d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 23195f25a66f6bbac563c94af94f03491b3ae43c40afPierre Ossman mmiowb(); 2320d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanout: 2321d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_unlock(&host->lock); 2322d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2323f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman /* 2324f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman * We have to delay this as it calls back into the driver. 2325f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman */ 2326f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman if (cardint) 2327f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman mmc_signal_sdio_irq(host->mmc); 2328f75979b77fb20b01522d8fab96dfc76cc9f42420Pierre Ossman 2329d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman return result; 2330d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 2331d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2332d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman/*****************************************************************************\ 2333d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 2334d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * Suspend/resume * 2335d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 2336d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman\*****************************************************************************/ 2337d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2338d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman#ifdef CONFIG_PM 2339d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 234029495aa04a30c21565243c5b9c028510446d242cManuel Laussint sdhci_suspend_host(struct sdhci_host *host) 2341d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 2342b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman int ret; 2343a715dfc7b9ef15ed5b398b185bd84cc015ff37f6Pierre Ossman 23447260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_disable_card_detection(host); 23457260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov 2346cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath /* Disable tuning since we are suspending */ 2347cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath if (host->version >= SDHCI_SPEC_300 && host->tuning_count && 2348cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->tuning_mode == SDHCI_TUNING_MODE_1) { 2349cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->flags &= ~SDHCI_NEEDS_RETUNING; 2350cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath mod_timer(&host->tuning_timer, jiffies + 2351cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->tuning_count * HZ); 2352cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath } 2353cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 23541a13f8fa76c880be41d6b1e6a2b44404bcbfdf9eMatt Fleming ret = mmc_suspend_host(host->mmc); 2355b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman if (ret) 2356b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman return ret; 2357a715dfc7b9ef15ed5b398b185bd84cc015ff37f6Pierre Ossman 2358b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman free_irq(host->irq, host); 2359d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 23609bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski if (host->vmmc) 23619bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski ret = regulator_disable(host->vmmc); 23629bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski 23639bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski return ret; 2364d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 2365d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2366b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre OssmanEXPORT_SYMBOL_GPL(sdhci_suspend_host); 2367d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2368b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossmanint sdhci_resume_host(struct sdhci_host *host) 2369b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman{ 2370b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman int ret; 2371d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 23729bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski if (host->vmmc) { 23739bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski int ret = regulator_enable(host->vmmc); 23749bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski if (ret) 23759bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski return ret; 23769bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski } 23779bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski 2378a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { 2379b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman if (host->ops->enable_dma) 2380b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman host->ops->enable_dma(host); 2381b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman } 2382d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2383b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED, 2384b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman mmc_hostname(host->mmc), host); 2385df1c4b7bf7f3b3a48d78c6e5c2fc5b9a1c01b821Pierre Ossman if (ret) 2386df1c4b7bf7f3b3a48d78c6e5c2fc5b9a1c01b821Pierre Ossman return ret; 2387d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 23882f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre sdhci_init(host, (host->mmc->pm_flags & MMC_PM_KEEP_POWER)); 2389b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman mmiowb(); 2390b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman 2391b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman ret = mmc_resume_host(host->mmc); 23927260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_enable_card_detection(host); 23937260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov 2394cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath /* Set the re-tuning expiration flag */ 2395cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath if ((host->version >= SDHCI_SPEC_300) && host->tuning_count && 2396cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath (host->tuning_mode == SDHCI_TUNING_MODE_1)) 2397cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->flags |= SDHCI_NEEDS_RETUNING; 2398cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 23992f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre return ret; 2400d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 2401d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2402b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre OssmanEXPORT_SYMBOL_GPL(sdhci_resume_host); 2403d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 24045f619704d18b93869d045abc49e09cdba109b04bDaniel Drakevoid sdhci_enable_irq_wakeups(struct sdhci_host *host) 24055f619704d18b93869d045abc49e09cdba109b04bDaniel Drake{ 24065f619704d18b93869d045abc49e09cdba109b04bDaniel Drake u8 val; 24075f619704d18b93869d045abc49e09cdba109b04bDaniel Drake val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL); 24085f619704d18b93869d045abc49e09cdba109b04bDaniel Drake val |= SDHCI_WAKE_ON_INT; 24095f619704d18b93869d045abc49e09cdba109b04bDaniel Drake sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL); 24105f619704d18b93869d045abc49e09cdba109b04bDaniel Drake} 24115f619704d18b93869d045abc49e09cdba109b04bDaniel Drake 24125f619704d18b93869d045abc49e09cdba109b04bDaniel DrakeEXPORT_SYMBOL_GPL(sdhci_enable_irq_wakeups); 24135f619704d18b93869d045abc49e09cdba109b04bDaniel Drake 2414d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman#endif /* CONFIG_PM */ 2415d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 241666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter#ifdef CONFIG_PM_RUNTIME 241766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 241866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic int sdhci_runtime_pm_get(struct sdhci_host *host) 241966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter{ 242066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter return pm_runtime_get_sync(host->mmc->parent); 242166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter} 242266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 242366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterstatic int sdhci_runtime_pm_put(struct sdhci_host *host) 242466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter{ 242566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter pm_runtime_mark_last_busy(host->mmc->parent); 242666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter return pm_runtime_put_autosuspend(host->mmc->parent); 242766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter} 242866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 242966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterint sdhci_runtime_suspend_host(struct sdhci_host *host) 243066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter{ 243166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter unsigned long flags; 243266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter int ret = 0; 243366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 243466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter /* Disable tuning since we are suspending */ 243566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (host->version >= SDHCI_SPEC_300 && 243666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->tuning_mode == SDHCI_TUNING_MODE_1) { 243766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter del_timer_sync(&host->tuning_timer); 243866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->flags &= ~SDHCI_NEEDS_RETUNING; 243966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter } 244066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 244166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter spin_lock_irqsave(&host->lock, flags); 244266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_mask_irqs(host, SDHCI_INT_ALL_MASK); 244366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter spin_unlock_irqrestore(&host->lock, flags); 244466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 244566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter synchronize_irq(host->irq); 244666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 244766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter spin_lock_irqsave(&host->lock, flags); 244866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->runtime_suspended = true; 244966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter spin_unlock_irqrestore(&host->lock, flags); 245066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 245166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter return ret; 245266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter} 245366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian HunterEXPORT_SYMBOL_GPL(sdhci_runtime_suspend_host); 245466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 245566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunterint sdhci_runtime_resume_host(struct sdhci_host *host) 245666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter{ 245766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter unsigned long flags; 245866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter int ret = 0, host_flags = host->flags; 245966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 246066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (host_flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { 246166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (host->ops->enable_dma) 246266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->ops->enable_dma(host); 246366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter } 246466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 246566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_init(host, 0); 246666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 246766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter /* Force clock and power re-program */ 246866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->pwr = 0; 246966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->clock = 0; 247066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_do_set_ios(host, &host->mmc->ios); 247166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 247266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_do_start_signal_voltage_switch(host, &host->mmc->ios); 247366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (host_flags & SDHCI_PV_ENABLED) 247466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_do_enable_preset_value(host, true); 247566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 247666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter /* Set the re-tuning expiration flag */ 247766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if ((host->version >= SDHCI_SPEC_300) && host->tuning_count && 247866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter (host->tuning_mode == SDHCI_TUNING_MODE_1)) 247966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->flags |= SDHCI_NEEDS_RETUNING; 248066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 248166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter spin_lock_irqsave(&host->lock, flags); 248266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 248366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->runtime_suspended = false; 248466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 248566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter /* Enable SDIO IRQ */ 248666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if ((host->flags & SDHCI_SDIO_IRQ_ENABLED)) 248766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_enable_sdio_irq_nolock(host, true); 248866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 248966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter /* Enable Card Detection */ 249066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter sdhci_enable_card_detection(host); 249166fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 249266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter spin_unlock_irqrestore(&host->lock, flags); 249366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 249466fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter return ret; 249566fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter} 249666fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian HunterEXPORT_SYMBOL_GPL(sdhci_runtime_resume_host); 249766fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 249866fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter#endif 249966fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter 2500d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman/*****************************************************************************\ 2501d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 2502b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman * Device allocation/registration * 2503d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 2504d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman\*****************************************************************************/ 2505d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2506b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossmanstruct sdhci_host *sdhci_alloc_host(struct device *dev, 2507b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman size_t priv_size) 2508d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 2509d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman struct mmc_host *mmc; 2510d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman struct sdhci_host *host; 2511d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2512b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman WARN_ON(dev == NULL); 2513d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2514b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman mmc = mmc_alloc_host(sizeof(struct sdhci_host) + priv_size, dev); 2515d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (!mmc) 2516b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman return ERR_PTR(-ENOMEM); 2517d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2518d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host = mmc_priv(mmc); 2519d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman host->mmc = mmc; 2520d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2521b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman return host; 2522b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman} 25238a4da1430f7f2a16df3be9c7b5d55ba4e75b708cPierre Ossman 2524b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre OssmanEXPORT_SYMBOL_GPL(sdhci_alloc_host); 2525d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2526b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossmanint sdhci_add_host(struct sdhci_host *host) 2527b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman{ 2528b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman struct mmc_host *mmc; 2529f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath u32 caps[2]; 2530f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath u32 max_current_caps; 2531f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath unsigned int ocr_avail; 2532b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman int ret; 2533d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2534b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman WARN_ON(host == NULL); 2535b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman if (host == NULL) 2536b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman return -EINVAL; 2537d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2538b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman mmc = host->mmc; 2539d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2540b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman if (debug_quirks) 2541b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman host->quirks = debug_quirks; 254266fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter if (debug_quirks2) 254366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Hunter host->quirks2 = debug_quirks2; 2544d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2545d96649ed5ace812ffc8d86252d7c663326ca47f8Pierre Ossman sdhci_reset(host, SDHCI_RESET_ALL); 2546d96649ed5ace812ffc8d86252d7c663326ca47f8Pierre Ossman 25474e4141a526dd7f5ac3ce1458ae79ea6e5a515b06Anton Vorontsov host->version = sdhci_readw(host, SDHCI_HOST_VERSION); 25482134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->version = (host->version & SDHCI_SPEC_VER_MASK) 25492134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman >> SDHCI_SPEC_VER_SHIFT; 255085105c53b0ce70a277160379f9d89309cefc0bfdZhangfei Gao if (host->version > SDHCI_SPEC_300) { 2551a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Unknown controller version (%d). " 2552b69c9058907642f8e1b32076906755c6623ea060Pierre Ossman "You may experience problems.\n", mmc_hostname(mmc), 25532134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->version); 25544a9655051fb1efa568e53baf5dfb21e33bad6bf6Pierre Ossman } 25554a9655051fb1efa568e53baf5dfb21e33bad6bf6Pierre Ossman 2556f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath caps[0] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? host->caps : 2557ccc92c23240cdf952ef7cc39ba563910dcbc9cbeMaxim Levitsky sdhci_readl(host, SDHCI_CAPABILITIES); 2558d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2559f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath caps[1] = (host->version >= SDHCI_SPEC_300) ? 2560f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath sdhci_readl(host, SDHCI_CAPABILITIES_1) : 0; 2561f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 2562b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman if (host->quirks & SDHCI_QUIRK_FORCE_DMA) 2563a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors host->flags |= SDHCI_USE_SDMA; 2564f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath else if (!(caps[0] & SDHCI_CAN_DO_SDMA)) 2565a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors DBG("Controller doesn't have SDMA capability\n"); 25666743527441430586aa82a0dee1b2700a2a974ebcPierre Ossman else 2567a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors host->flags |= SDHCI_USE_SDMA; 2568d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2569b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman if ((host->quirks & SDHCI_QUIRK_BROKEN_DMA) && 2570a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors (host->flags & SDHCI_USE_SDMA)) { 2571cee687ce4ab1197e20d4dacc09df01531362fdbdRolf Eike Beer DBG("Disabling DMA as it is marked broken\n"); 2572a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors host->flags &= ~SDHCI_USE_SDMA; 25737c168e3db7d900008ee304574057e0dc1a8505afFeng Tang } 25747c168e3db7d900008ee304574057e0dc1a8505afFeng Tang 2575f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if ((host->version >= SDHCI_SPEC_200) && 2576f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath (caps[0] & SDHCI_CAN_DO_ADMA2)) 2577a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors host->flags |= SDHCI_USE_ADMA; 25782134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 25792134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if ((host->quirks & SDHCI_QUIRK_BROKEN_ADMA) && 25802134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman (host->flags & SDHCI_USE_ADMA)) { 25812134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman DBG("Disabling ADMA as it is marked broken\n"); 25822134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->flags &= ~SDHCI_USE_ADMA; 25832134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 25842134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 2585a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { 2586b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman if (host->ops->enable_dma) { 2587b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman if (host->ops->enable_dma(host)) { 2588a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_warning("%s: No suitable DMA " 2589b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman "available. Falling back to PIO.\n", 2590b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman mmc_hostname(mmc)); 2591a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors host->flags &= 2592a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors ~(SDHCI_USE_SDMA | SDHCI_USE_ADMA); 2593b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman } 2594d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 2595d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman } 2596d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 25972134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (host->flags & SDHCI_USE_ADMA) { 25982134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman /* 25992134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * We need to allocate descriptors for all sg entries 26002134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * (128) and potentially one alignment transfer for 26012134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * each of those entries. 26022134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman */ 26032134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->adma_desc = kmalloc((128 * 2 + 1) * 4, GFP_KERNEL); 26042134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->align_buffer = kmalloc(128 * 4, GFP_KERNEL); 26052134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (!host->adma_desc || !host->align_buffer) { 26062134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman kfree(host->adma_desc); 26072134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman kfree(host->align_buffer); 2608a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_warning("%s: Unable to allocate ADMA " 26092134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman "buffers. Falling back to standard DMA.\n", 26102134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman mmc_hostname(mmc)); 26112134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->flags &= ~SDHCI_USE_ADMA; 26122134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 26132134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman } 26142134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 26157659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman /* 26167659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman * If we use DMA, then it's up to the caller to set the DMA 26177659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman * mask, but PIO does not need the hw shim so we set a new 26187659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman * mask here in that case. 26197659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman */ 2620a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors if (!(host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))) { 26217659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman host->dma_mask = DMA_BIT_MASK(64); 26227659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman mmc_dev(host->mmc)->dma_mask = &host->dma_mask; 26237659150c60839a2bd31f74e866374abb9be17e43Pierre Ossman } 2624d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2625c4687d5f601be3f928b815b46964f7426c31aec7Zhangfei Gao if (host->version >= SDHCI_SPEC_300) 2626f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath host->max_clk = (caps[0] & SDHCI_CLOCK_V3_BASE_MASK) 2627c4687d5f601be3f928b815b46964f7426c31aec7Zhangfei Gao >> SDHCI_CLOCK_BASE_SHIFT; 2628c4687d5f601be3f928b815b46964f7426c31aec7Zhangfei Gao else 2629f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath host->max_clk = (caps[0] & SDHCI_CLOCK_BASE_MASK) 2630c4687d5f601be3f928b815b46964f7426c31aec7Zhangfei Gao >> SDHCI_CLOCK_BASE_SHIFT; 2631c4687d5f601be3f928b815b46964f7426c31aec7Zhangfei Gao 26324240ff0a02cb52f7d10dc1df6d82ba9c27dba07bBen Dooks host->max_clk *= 1000000; 2633f27f47ef5b67106ff1cdeebf061387a7b30c12bcAnton Vorontsov if (host->max_clk == 0 || host->quirks & 2634f27f47ef5b67106ff1cdeebf061387a7b30c12bcAnton Vorontsov SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN) { 26354240ff0a02cb52f7d10dc1df6d82ba9c27dba07bBen Dooks if (!host->ops->get_max_clock) { 2636a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Hardware doesn't specify base clock " 26374240ff0a02cb52f7d10dc1df6d82ba9c27dba07bBen Dooks "frequency.\n", mmc_hostname(mmc)); 26384240ff0a02cb52f7d10dc1df6d82ba9c27dba07bBen Dooks return -ENODEV; 26394240ff0a02cb52f7d10dc1df6d82ba9c27dba07bBen Dooks } 26404240ff0a02cb52f7d10dc1df6d82ba9c27dba07bBen Dooks host->max_clk = host->ops->get_max_clock(host); 26418ef1a14379e105c1419d21e96ffac53202bc0501Pierre Ossman } 2642d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2643d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman /* 2644c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * In case of Host Controller v3.00, find out whether clock 2645c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * multiplier is supported. 2646c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath */ 2647c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath host->clk_mul = (caps[1] & SDHCI_CLOCK_MUL_MASK) >> 2648c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath SDHCI_CLOCK_MUL_SHIFT; 2649c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath 2650c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath /* 2651c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * In case the value in Clock Multiplier is 0, then programmable 2652c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * clock mode is not supported, otherwise the actual clock 2653c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * multiplier is one more than the value of Clock Multiplier 2654c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath * in the Capabilities Register. 2655c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath */ 2656c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath if (host->clk_mul) 2657c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath host->clk_mul += 1; 2658c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath 2659c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath /* 2660d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * Set host parameters. 2661d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman */ 2662d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman mmc->ops = &sdhci_ops; 2663c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath mmc->f_max = host->max_clk; 2664ce5f036bbbfc6c21d7b55b8fdaa2e2bd56392d94Marek Szyprowski if (host->ops->get_min_clock) 2665a9e58f25734e153b8c6516d904e2398fb8b0b23dAnton Vorontsov mmc->f_min = host->ops->get_min_clock(host); 2666c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath else if (host->version >= SDHCI_SPEC_300) { 2667c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath if (host->clk_mul) { 2668c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath mmc->f_min = (host->max_clk * host->clk_mul) / 1024; 2669c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath mmc->f_max = host->max_clk * host->clk_mul; 2670c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath } else 2671c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_300; 2672c3ed3877625f10d600b0eca2ca48a68c46aed660Arindam Nath } else 26730397526d6ae2518b6c53efd1ff1e81b7d24c91daZhangfei Gao mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_200; 267415ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity 2675272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko host->timeout_clk = 2676272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko (caps[0] & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT; 2677272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko if (host->timeout_clk == 0) { 2678272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko if (host->ops->get_timeout_clock) { 2679272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko host->timeout_clk = host->ops->get_timeout_clock(host); 2680272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko } else if (!(host->quirks & 2681272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)) { 2682a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Hardware doesn't specify timeout clock " 2683272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko "frequency.\n", mmc_hostname(mmc)); 2684272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko return -ENODEV; 2685272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko } 2686272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko } 2687272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko if (caps[0] & SDHCI_TIMEOUT_CLK_UNIT) 2688272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko host->timeout_clk *= 1000; 2689272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko 2690272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK) 269165be3fef930beb3e282e7f23dfba63289971430cAndy Shevchenko host->timeout_clk = mmc->f_max / 1000; 2692272308caaa6c0f2b1500a3660b9fa75f17a45cc4Andy Shevchenko 269365be3fef930beb3e282e7f23dfba63289971430cAndy Shevchenko mmc->max_discard_to = (1 << 27) / host->timeout_clk; 269458d1246db340793c408b22884598e4ce4d1d4abaAdrian Hunter 2695e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23; 2696e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin 2697e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12) 2698e89d456fcdde2df008c032bf928e69e628e07a28Andrei Warkentin host->flags |= SDHCI_AUTO_CMD12; 26995fe23c7f51def59f66bc6aeee988ef1a467a2c8cAnton Vorontsov 27008edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin /* Auto-CMD23 stuff only works in ADMA or PIO. */ 27014f3d3e9b50931a3ec70f324d53fb7437e2a39388Andrei Warkentin if ((host->version >= SDHCI_SPEC_300) && 27028edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin ((host->flags & SDHCI_USE_ADMA) || 27034f3d3e9b50931a3ec70f324d53fb7437e2a39388Andrei Warkentin !(host->flags & SDHCI_USE_SDMA))) { 27048edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin host->flags |= SDHCI_AUTO_CMD23; 27058edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc)); 27068edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin } else { 27078edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin DBG("%s: Auto-CMD23 unavailable\n", mmc_hostname(mmc)); 27088edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin } 27098edf63710bd43e62d59bfe017df542fa0713bbb3Andrei Warkentin 271015ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity /* 271115ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity * A controller may support 8-bit width, but the board itself 271215ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity * might not have the pins brought out. Boards that support 271315ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity * 8-bit width must set "mmc->caps |= MMC_CAP_8_BIT_DATA;" in 271415ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity * their platform code before calling sdhci_add_host(), and we 271515ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity * won't assume 8-bit width for hosts without that CAP. 271615ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity */ 27175fe23c7f51def59f66bc6aeee988ef1a467a2c8cAnton Vorontsov if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA)) 271815ec44611904be0dcc97b84c29fbf964e5e2b36fPhilip Rakity mmc->caps |= MMC_CAP_4_BIT_DATA; 2719d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2720f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (caps[0] & SDHCI_CAN_DO_HISPD) 2721a29e7e18bddde778deb2cb101dbceca56b15e05eZhangfei Gao mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED; 2722cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman 2723176d1ed426a2a73a87c62a8aa05f6d002353cd50Jaehoon Chung if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) && 2724176d1ed426a2a73a87c62a8aa05f6d002353cd50Jaehoon Chung mmc_card_is_removable(mmc)) 272568d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov mmc->caps |= MMC_CAP_NEEDS_POLL; 272668d1fb7e229c6f95be4fbbe3eb46b24e41184924Anton Vorontsov 2727f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* UHS-I mode(s) supported by the host controller. */ 2728f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (host->version >= SDHCI_SPEC_300) 2729f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath mmc->caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25; 2730f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 2731f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* SDR104 supports also implies SDR50 support */ 2732f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (caps[1] & SDHCI_SUPPORT_SDR104) 2733f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath mmc->caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_SDR50; 2734f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath else if (caps[1] & SDHCI_SUPPORT_SDR50) 2735f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath mmc->caps |= MMC_CAP_UHS_SDR50; 2736f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 2737f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (caps[1] & SDHCI_SUPPORT_DDR50) 2738f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath mmc->caps |= MMC_CAP_UHS_DDR50; 2739f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 2740b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath /* Does the host needs tuning for SDR50? */ 2741b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath if (caps[1] & SDHCI_USE_SDR50_TUNING) 2742b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath host->flags |= SDHCI_SDR50_NEEDS_TUNING; 2743b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 2744d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath /* Driver Type(s) (A, C, D) supported by the host */ 2745d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath if (caps[1] & SDHCI_DRIVER_TYPE_A) 2746d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath mmc->caps |= MMC_CAP_DRIVER_TYPE_A; 2747d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath if (caps[1] & SDHCI_DRIVER_TYPE_C) 2748d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath mmc->caps |= MMC_CAP_DRIVER_TYPE_C; 2749d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath if (caps[1] & SDHCI_DRIVER_TYPE_D) 2750d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath mmc->caps |= MMC_CAP_DRIVER_TYPE_D; 2751d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath 2752bec8726abc72bf30d2743a722aa37cd69e7a0580Girish K S /* 2753bec8726abc72bf30d2743a722aa37cd69e7a0580Girish K S * If Power Off Notify capability is enabled by the host, 2754bec8726abc72bf30d2743a722aa37cd69e7a0580Girish K S * set notify to short power off notify timeout value. 2755bec8726abc72bf30d2743a722aa37cd69e7a0580Girish K S */ 2756bec8726abc72bf30d2743a722aa37cd69e7a0580Girish K S if (mmc->caps2 & MMC_CAP2_POWEROFF_NOTIFY) 2757bec8726abc72bf30d2743a722aa37cd69e7a0580Girish K S mmc->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT; 2758bec8726abc72bf30d2743a722aa37cd69e7a0580Girish K S else 2759bec8726abc72bf30d2743a722aa37cd69e7a0580Girish K S mmc->power_notify_type = MMC_HOST_PW_NOTIFY_NONE; 2760bec8726abc72bf30d2743a722aa37cd69e7a0580Girish K S 2761cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath /* Initial value for re-tuning timer count */ 2762cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >> 2763cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath SDHCI_RETUNING_TIMER_COUNT_SHIFT; 2764cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 2765cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath /* 2766cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * In case Re-tuning Timer is not disabled, the actual value of 2767cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath * re-tuning timer will be 2 ^ (n - 1). 2768cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath */ 2769cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath if (host->tuning_count) 2770cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->tuning_count = 1 << (host->tuning_count - 1); 2771cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 2772cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath /* Re-tuning mode supported by the Host Controller */ 2773cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->tuning_mode = (caps[1] & SDHCI_RETUNING_MODE_MASK) >> 2774cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath SDHCI_RETUNING_MODE_SHIFT; 2775cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 27768f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai ocr_avail = 0; 2777f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* 2778f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * According to SD Host Controller spec v3.00, if the Host System 2779f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * can afford more than 150mA, Host Driver should set XPC to 1. Also 2780f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * the value is meaningful only if Voltage Support in the Capabilities 2781f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * register is set. The actual current value is 4 times the register 2782f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * value. 2783f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath */ 2784f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath max_current_caps = sdhci_readl(host, SDHCI_MAX_CURRENT); 2785f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 2786f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (caps[0] & SDHCI_CAN_VDD_330) { 2787f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath int max_current_330; 2788f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 27898f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai ocr_avail |= MMC_VDD_32_33 | MMC_VDD_33_34; 2790f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 2791f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath max_current_330 = ((max_current_caps & 2792f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath SDHCI_MAX_CURRENT_330_MASK) >> 2793f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath SDHCI_MAX_CURRENT_330_SHIFT) * 2794f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath SDHCI_MAX_CURRENT_MULTIPLIER; 2795f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 2796f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (max_current_330 > 150) 2797f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath mmc->caps |= MMC_CAP_SET_XPC_330; 2798f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath } 2799f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (caps[0] & SDHCI_CAN_VDD_300) { 2800f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath int max_current_300; 2801f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 28028f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai ocr_avail |= MMC_VDD_29_30 | MMC_VDD_30_31; 2803f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 2804f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath max_current_300 = ((max_current_caps & 2805f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath SDHCI_MAX_CURRENT_300_MASK) >> 2806f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath SDHCI_MAX_CURRENT_300_SHIFT) * 2807f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath SDHCI_MAX_CURRENT_MULTIPLIER; 2808f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 2809f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (max_current_300 > 150) 2810f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath mmc->caps |= MMC_CAP_SET_XPC_300; 2811f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath } 2812f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (caps[0] & SDHCI_CAN_VDD_180) { 2813f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath int max_current_180; 2814f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 28158f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai ocr_avail |= MMC_VDD_165_195; 28168f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai 2817f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath max_current_180 = ((max_current_caps & 2818f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath SDHCI_MAX_CURRENT_180_MASK) >> 2819f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath SDHCI_MAX_CURRENT_180_SHIFT) * 2820f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath SDHCI_MAX_CURRENT_MULTIPLIER; 2821f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 2822f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (max_current_180 > 150) 2823f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath mmc->caps |= MMC_CAP_SET_XPC_180; 28245371c927bcd06a5c9dd6785bab2d452b87d9abc6Arindam Nath 28255371c927bcd06a5c9dd6785bab2d452b87d9abc6Arindam Nath /* Maximum current capabilities of the host at 1.8V */ 28265371c927bcd06a5c9dd6785bab2d452b87d9abc6Arindam Nath if (max_current_180 >= 800) 28275371c927bcd06a5c9dd6785bab2d452b87d9abc6Arindam Nath mmc->caps |= MMC_CAP_MAX_CURRENT_800; 28285371c927bcd06a5c9dd6785bab2d452b87d9abc6Arindam Nath else if (max_current_180 >= 600) 28295371c927bcd06a5c9dd6785bab2d452b87d9abc6Arindam Nath mmc->caps |= MMC_CAP_MAX_CURRENT_600; 28305371c927bcd06a5c9dd6785bab2d452b87d9abc6Arindam Nath else if (max_current_180 >= 400) 28315371c927bcd06a5c9dd6785bab2d452b87d9abc6Arindam Nath mmc->caps |= MMC_CAP_MAX_CURRENT_400; 28325371c927bcd06a5c9dd6785bab2d452b87d9abc6Arindam Nath else 28335371c927bcd06a5c9dd6785bab2d452b87d9abc6Arindam Nath mmc->caps |= MMC_CAP_MAX_CURRENT_200; 2834f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath } 2835f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 28368f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai mmc->ocr_avail = ocr_avail; 28378f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai mmc->ocr_avail_sdio = ocr_avail; 28388f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai if (host->ocr_avail_sdio) 28398f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai mmc->ocr_avail_sdio &= host->ocr_avail_sdio; 28408f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai mmc->ocr_avail_sd = ocr_avail; 28418f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai if (host->ocr_avail_sd) 28428f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai mmc->ocr_avail_sd &= host->ocr_avail_sd; 28438f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai else /* normal SD controllers don't support 1.8V */ 28448f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai mmc->ocr_avail_sd &= ~MMC_VDD_165_195; 28458f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai mmc->ocr_avail_mmc = ocr_avail; 28468f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai if (host->ocr_avail_mmc) 28478f230f454fe04ba326ffaead3a6b88dcf44eaf4bTakashi Iwai mmc->ocr_avail_mmc &= host->ocr_avail_mmc; 2848146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman 2849146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman if (mmc->ocr_avail == 0) { 2850a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Hardware doesn't report any " 2851b69c9058907642f8e1b32076906755c6623ea060Pierre Ossman "support voltages.\n", mmc_hostname(mmc)); 2852b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman return -ENODEV; 2853146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman } 2854146ad66eac836c0b976c98f428d73e1f6a75270dPierre Ossman 2855d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman spin_lock_init(&host->lock); 2856d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2857d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman /* 28582134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * Maximum number of segments. Depends on if the hardware 28592134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * can do scatter/gather or not. 2860d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman */ 28612134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman if (host->flags & SDHCI_USE_ADMA) 2862a36274e0184193e393fb82957925c3981a6b0477Martin K. Petersen mmc->max_segs = 128; 2863a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors else if (host->flags & SDHCI_USE_SDMA) 2864a36274e0184193e393fb82957925c3981a6b0477Martin K. Petersen mmc->max_segs = 1; 28652134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman else /* PIO */ 2866a36274e0184193e393fb82957925c3981a6b0477Martin K. Petersen mmc->max_segs = 128; 2867d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2868d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman /* 2869bab7696184bbf0ea48d56902bd1f9ac983079ad2Pierre Ossman * Maximum number of sectors in one transfer. Limited by DMA boundary 287055db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman * size (512KiB). 2871d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman */ 287255db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman mmc->max_req_size = 524288; 2873d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2874d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman /* 2875d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * Maximum segment size. Could be one segment with the maximum number 28762134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * of bytes. When doing hardware scatter/gather, each entry cannot 28772134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman * be larger than 64 KiB though. 2878d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman */ 287930652aa36b58d57fcc1a0acce51e391bbb6edf5eOlof Johansson if (host->flags & SDHCI_USE_ADMA) { 288030652aa36b58d57fcc1a0acce51e391bbb6edf5eOlof Johansson if (host->quirks & SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC) 288130652aa36b58d57fcc1a0acce51e391bbb6edf5eOlof Johansson mmc->max_seg_size = 65535; 288230652aa36b58d57fcc1a0acce51e391bbb6edf5eOlof Johansson else 288330652aa36b58d57fcc1a0acce51e391bbb6edf5eOlof Johansson mmc->max_seg_size = 65536; 288430652aa36b58d57fcc1a0acce51e391bbb6edf5eOlof Johansson } else { 28852134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman mmc->max_seg_size = mmc->max_req_size; 288630652aa36b58d57fcc1a0acce51e391bbb6edf5eOlof Johansson } 2887d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2888d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman /* 2889fe4a3c7a20f14d86022a8132adbf6ddb98e7197cPierre Ossman * Maximum block size. This varies from controller to controller and 2890fe4a3c7a20f14d86022a8132adbf6ddb98e7197cPierre Ossman * is specified in the capabilities register. 2891fe4a3c7a20f14d86022a8132adbf6ddb98e7197cPierre Ossman */ 28920633f654241483edc8a235ab87264ff6bbcd08d5Anton Vorontsov if (host->quirks & SDHCI_QUIRK_FORCE_BLK_SZ_2048) { 28930633f654241483edc8a235ab87264ff6bbcd08d5Anton Vorontsov mmc->max_blk_size = 2; 28940633f654241483edc8a235ab87264ff6bbcd08d5Anton Vorontsov } else { 2895f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath mmc->max_blk_size = (caps[0] & SDHCI_MAX_BLOCK_MASK) >> 28960633f654241483edc8a235ab87264ff6bbcd08d5Anton Vorontsov SDHCI_MAX_BLOCK_SHIFT; 28970633f654241483edc8a235ab87264ff6bbcd08d5Anton Vorontsov if (mmc->max_blk_size >= 3) { 2898a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_warning("%s: Invalid maximum block size, " 28990633f654241483edc8a235ab87264ff6bbcd08d5Anton Vorontsov "assuming 512 bytes\n", mmc_hostname(mmc)); 29000633f654241483edc8a235ab87264ff6bbcd08d5Anton Vorontsov mmc->max_blk_size = 0; 29010633f654241483edc8a235ab87264ff6bbcd08d5Anton Vorontsov } 29020633f654241483edc8a235ab87264ff6bbcd08d5Anton Vorontsov } 29030633f654241483edc8a235ab87264ff6bbcd08d5Anton Vorontsov 29040633f654241483edc8a235ab87264ff6bbcd08d5Anton Vorontsov mmc->max_blk_size = 512 << mmc->max_blk_size; 2905fe4a3c7a20f14d86022a8132adbf6ddb98e7197cPierre Ossman 2906fe4a3c7a20f14d86022a8132adbf6ddb98e7197cPierre Ossman /* 290755db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman * Maximum block count. 290855db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman */ 29091388eefd5a5e6aaa3cb04070bfc2b944c1d24b82Ben Dooks mmc->max_blk_count = (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535; 291055db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman 291155db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman /* 2912d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * Init tasklets. 2913d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman */ 2914d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman tasklet_init(&host->card_tasklet, 2915d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_tasklet_card, (unsigned long)host); 2916d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman tasklet_init(&host->finish_tasklet, 2917d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_tasklet_finish, (unsigned long)host); 2918d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2919e4cad1b5a4851c90c1bcf460062074a2fa10815bAl Viro setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host); 2920d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2921cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath if (host->version >= SDHCI_SPEC_300) { 2922b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath init_waitqueue_head(&host->buf_ready_int); 2923b513ea250eb7c36a8afb3df938d632ca6b4df7cdArindam Nath 2924cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath /* Initialize re-tuning timer */ 2925cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath init_timer(&host->tuning_timer); 2926cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->tuning_timer.data = (unsigned long)host; 2927cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath host->tuning_timer.function = sdhci_tuning_timer; 2928cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath } 2929cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath 2930dace145374b8e39aeb920304c358ab5e220341abThomas Gleixner ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED, 2931b69c9058907642f8e1b32076906755c6623ea060Pierre Ossman mmc_hostname(mmc), host); 2932d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman if (ret) 29338ef1a14379e105c1419d21e96ffac53202bc0501Pierre Ossman goto untasklet; 2934d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 29359bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski host->vmmc = regulator_get(mmc_dev(mmc), "vmmc"); 29369bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski if (IS_ERR(host->vmmc)) { 2937a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc)); 29389bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski host->vmmc = NULL; 29399bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski } else { 29409bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski regulator_enable(host->vmmc); 29419bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski } 29429bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski 29432f4cbb3d834922ffa0309b6a08fa42dac87ef9d2Nicolas Pitre sdhci_init(host, 0); 2944d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2945d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman#ifdef CONFIG_MMC_DEBUG 2946d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman sdhci_dumpregs(host); 2947d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman#endif 2948d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2949f9134319c81c6c56e0ddf38e7adac2492b243d9bPierre Ossman#ifdef SDHCI_USE_LEDS_CLASS 29505dbace0c9ba110c1a3810a89fa6bf12b7574b5a3Helmut Schaa snprintf(host->led_name, sizeof(host->led_name), 29515dbace0c9ba110c1a3810a89fa6bf12b7574b5a3Helmut Schaa "%s::", mmc_hostname(mmc)); 29525dbace0c9ba110c1a3810a89fa6bf12b7574b5a3Helmut Schaa host->led.name = host->led_name; 29532f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman host->led.brightness = LED_OFF; 29542f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman host->led.default_trigger = mmc_hostname(mmc); 29552f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman host->led.brightness_set = sdhci_led_control; 29562f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman 2957b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman ret = led_classdev_register(mmc_dev(mmc), &host->led); 29582f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman if (ret) 29592f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman goto reset; 29602f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman#endif 29612f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman 29625f25a66f6bbac563c94af94f03491b3ae43c40afPierre Ossman mmiowb(); 29635f25a66f6bbac563c94af94f03491b3ae43c40afPierre Ossman 2964d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman mmc_add_host(mmc); 2965d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2966a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_info("%s: SDHCI controller on %s [%s] using %s\n", 2967d1b268630875a7713b5d468a0c03403c5b721c8eKay Sievers mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)), 2968a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors (host->flags & SDHCI_USE_ADMA) ? "ADMA" : 2969a13abc7b0814da7733c531453a207729b542ecf8Richard Röjfors (host->flags & SDHCI_USE_SDMA) ? "DMA" : "PIO"); 2970d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 29717260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_enable_card_detection(host); 29727260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov 2973d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman return 0; 2974d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2975f9134319c81c6c56e0ddf38e7adac2492b243d9bPierre Ossman#ifdef SDHCI_USE_LEDS_CLASS 29762f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossmanreset: 29772f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman sdhci_reset(host, SDHCI_RESET_ALL); 29782f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman free_irq(host->irq, host); 29792f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman#endif 29808ef1a14379e105c1419d21e96ffac53202bc0501Pierre Ossmanuntasklet: 2981d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman tasklet_kill(&host->card_tasklet); 2982d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman tasklet_kill(&host->finish_tasklet); 2983d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2984d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman return ret; 2985d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 2986d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 2987b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre OssmanEXPORT_SYMBOL_GPL(sdhci_add_host); 2988d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 29891e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossmanvoid sdhci_remove_host(struct sdhci_host *host, int dead) 2990b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman{ 29911e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman unsigned long flags; 29921e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman 29931e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman if (dead) { 29941e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman spin_lock_irqsave(&host->lock, flags); 29951e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman 29961e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman host->flags |= SDHCI_DEVICE_DEAD; 29971e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman 29981e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman if (host->mrq) { 2999a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_err("%s: Controller removed during " 30001e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman " transfer!\n", mmc_hostname(host->mmc)); 30011e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman 30021e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman host->mrq->cmd->error = -ENOMEDIUM; 30031e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman tasklet_schedule(&host->finish_tasklet); 30041e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman } 30051e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman 30061e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman spin_unlock_irqrestore(&host->lock, flags); 30071e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman } 30081e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman 30097260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov sdhci_disable_card_detection(host); 30107260cf5e12393536ce61d184c3fc750fb2ba635aAnton Vorontsov 3011b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman mmc_remove_host(host->mmc); 3012d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3013f9134319c81c6c56e0ddf38e7adac2492b243d9bPierre Ossman#ifdef SDHCI_USE_LEDS_CLASS 30142f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman led_classdev_unregister(&host->led); 30152f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman#endif 30162f730fec83be76f1b3b8f0066b3447f55c50d7a0Pierre Ossman 30171e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman if (!dead) 30181e72859e3ae16346d4007024b20d2d4ef387dcc3Pierre Ossman sdhci_reset(host, SDHCI_RESET_ALL); 3019d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3020d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman free_irq(host->irq, host); 3021d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3022d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman del_timer_sync(&host->timer); 3023cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath if (host->version >= SDHCI_SPEC_300) 3024cf2b5eea1ea0ff9b3184bc6771bcb93a9fdcd1d9Arindam Nath del_timer_sync(&host->tuning_timer); 3025d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3026d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman tasklet_kill(&host->card_tasklet); 3027d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman tasklet_kill(&host->finish_tasklet); 30282134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 30299bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski if (host->vmmc) { 30309bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski regulator_disable(host->vmmc); 30319bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski regulator_put(host->vmmc); 30329bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski } 30339bea3c850dbff2296892298614388bdc71ad2170Marek Szyprowski 30342134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman kfree(host->adma_desc); 30352134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman kfree(host->align_buffer); 30362134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman 30372134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->adma_desc = NULL; 30382134a922c6e75c779983cad5d8aae832275f5a0dPierre Ossman host->align_buffer = NULL; 3039d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 3040d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3041b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre OssmanEXPORT_SYMBOL_GPL(sdhci_remove_host); 3042d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3043b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossmanvoid sdhci_free_host(struct sdhci_host *host) 3044d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 3045b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman mmc_free_host(host->mmc); 3046d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 3047d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3048b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre OssmanEXPORT_SYMBOL_GPL(sdhci_free_host); 3049d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3050d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman/*****************************************************************************\ 3051d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 3052d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * Driver init/exit * 3053d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman * * 3054d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman\*****************************************************************************/ 3055d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3056d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic int __init sdhci_drv_init(void) 3057d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 3058a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_info(DRIVER_NAME 305952fbf9c976b36654e08e94c3107ddbaac7e2da33Pierre Ossman ": Secure Digital Host Controller Interface driver\n"); 3060a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993Girish K S pr_info(DRIVER_NAME ": Copyright(c) Pierre Ossman\n"); 3061d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3062b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre Ossman return 0; 3063d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 3064d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3065d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanstatic void __exit sdhci_drv_exit(void) 3066d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman{ 3067d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman} 3068d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3069d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanmodule_init(sdhci_drv_init); 3070d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossmanmodule_exit(sdhci_drv_exit); 3071d129bceb1d44ed3c23b99164849193703372bab4Pierre Ossman 3072df673b227ce08a7706b30fd2bf6512393d9c3c29Pierre Ossmanmodule_param(debug_quirks, uint, 0444); 307366fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian Huntermodule_param(debug_quirks2, uint, 0444); 30746743527441430586aa82a0dee1b2700a2a974ebcPierre Ossman 307532710e8fd537adeb53f98dec92e4a77caac512f5Pierre OssmanMODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>"); 3076b8c86fc5d8deaa5a6dc49c2c1ed144e6838bf0f3Pierre OssmanMODULE_DESCRIPTION("Secure Digital Host Controller Interface core driver"); 3077d129bceb1d44ed3c23b99164849193703372bab4Pierre OssmanMODULE_LICENSE("GPL"); 30786743527441430586aa82a0dee1b2700a2a974ebcPierre Ossman 3079df673b227ce08a7706b30fd2bf6512393d9c3c29Pierre OssmanMODULE_PARM_DESC(debug_quirks, "Force certain quirks."); 308066fd8ad5100b5003046aa744a4f12fa31bb831f9Adrian HunterMODULE_PARM_DESC(debug_quirks2, "Force certain other quirks."); 3081