core.c revision 778e277cb82411c9002ca28ccbd216c4d9eb9158
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2aaac1b470bd0dccb30912356617069dc6199cc80Pierre Ossman * linux/drivers/mmc/core/core.c 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2003-2004 Russell King, All Rights Reserved. 55b4fd9aef778e223968dfab1b90f905b3f2bd23dPierre Ossman * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. 6ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved. 7bce40a36de574376f41f1ff3c4d212a7da2a3c90Philip Langdale * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it under the terms of the GNU General Public License version 2 as 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * published by the Free Software Foundation. 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/interrupt.h> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/completion.h> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/device.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/delay.h> 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/pagemap.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/err.h> 21af8350c756cb48a738474738f7bf8c0e572fa057Pierre Ossman#include <linux/leds.h> 22b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman#include <linux/scatterlist.h> 2386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov#include <linux/log2.h> 245c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell#include <linux/regulator/consumer.h> 25e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen#include <linux/pm_runtime.h> 2635eb6db11ed9cbf9702ec90a28779a51fe4a21a9Amerigo Wang#include <linux/suspend.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mmc/card.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mmc/host.h> 30da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include <linux/mmc/mmc.h> 31da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include <linux/mmc/sd.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33aaac1b470bd0dccb30912356617069dc6199cc80Pierre Ossman#include "core.h" 34ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman#include "bus.h" 35ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman#include "host.h" 36e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman#include "sdio_bus.h" 37da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman 38da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include "mmc_ops.h" 39da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include "sd_ops.h" 405c4e6f1301649d5b29dd0f70e6da83e728ab5ca5Pierre Ossman#include "sdio_ops.h" 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic struct workqueue_struct *workqueue; 43ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 44ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman/* 45af51715079e7fb6b290e1881d63d815dc4de5011David Brownell * Enabling software CRCs on the data blocks can be a significant (30%) 46af51715079e7fb6b290e1881d63d815dc4de5011David Brownell * performance cost, and for other reasons may not always be desired. 47af51715079e7fb6b290e1881d63d815dc4de5011David Brownell * So we allow it it to be disabled. 48af51715079e7fb6b290e1881d63d815dc4de5011David Brownell */ 49af51715079e7fb6b290e1881d63d815dc4de5011David Brownellint use_spi_crc = 1; 50af51715079e7fb6b290e1881d63d815dc4de5011David Brownellmodule_param(use_spi_crc, bool, 0); 51af51715079e7fb6b290e1881d63d815dc4de5011David Brownell 52af51715079e7fb6b290e1881d63d815dc4de5011David Brownell/* 53bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings * We normally treat cards as removed during suspend if they are not 54bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings * known to be on a non-removable bus, to avoid the risk of writing 55bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings * back data to a different card after resume. Allow this to be 56bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings * overridden if necessary. 57bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings */ 58bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings#ifdef CONFIG_MMC_UNSAFE_RESUME 59bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchingsint mmc_assume_removable; 60bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings#else 61bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchingsint mmc_assume_removable = 1; 62bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings#endif 6371d7d3d190fe77588269a8febf93cd739bd91eb3Matt FlemingEXPORT_SYMBOL(mmc_assume_removable); 64bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchingsmodule_param_named(removable, mmc_assume_removable, bool, 0644); 65bd68e0838fe85794b06892054772fa013a8d1986Ben HutchingsMODULE_PARM_DESC( 66bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings removable, 67bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings "MMC/SD cards are removable and may be removed during suspend"); 68bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings 69bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings/* 70ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman * Internal function. Schedule delayed work in the MMC work queue. 71ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman */ 72ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic int mmc_schedule_delayed_work(struct delayed_work *work, 73ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman unsigned long delay) 74ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 75ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman return queue_delayed_work(workqueue, work, delay); 76ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 77ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 78ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman/* 79ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman * Internal function. Flush all scheduled work from the MMC work queue. 80ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman */ 81ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic void mmc_flush_scheduled_work(void) 82ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 83ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman flush_workqueue(workqueue); 84ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 85ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 87fe10c6abea8bc83291a13e0580b3e4c355710b09Russell King * mmc_request_done - finish processing an MMC request 88fe10c6abea8bc83291a13e0580b3e4c355710b09Russell King * @host: MMC host which completed request 89fe10c6abea8bc83291a13e0580b3e4c355710b09Russell King * @mrq: MMC request which request 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MMC drivers should call this function when they have completed 92fe10c6abea8bc83291a13e0580b3e4c355710b09Russell King * their processing of a request. 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_command *cmd = mrq->cmd; 97920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King int err = cmd->error; 98920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King 99af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (err && cmd->retries && mmc_host_is_spi(host)) { 100af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) 101af51715079e7fb6b290e1881d63d815dc4de5011David Brownell cmd->retries = 0; 102af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } 103af51715079e7fb6b290e1881d63d815dc4de5011David Brownell 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err && cmd->retries) { 105e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: req failed (CMD%u): %d, retrying...\n", 106e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), cmd->opcode, err); 107e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->retries--; 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->error = 0; 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ops->request(host, mrq); 111e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } else { 112af8350c756cb48a738474738f7bf8c0e572fa057Pierre Ossman led_trigger_event(host->led, LED_OFF); 113af8350c756cb48a738474738f7bf8c0e572fa057Pierre Ossman 114e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", 115e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), cmd->opcode, err, 116e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman cmd->resp[0], cmd->resp[1], 117e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman cmd->resp[2], cmd->resp[3]); 118e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 119e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->data) { 120e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: %d bytes transferred: %d\n", 121e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), 122e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->data->bytes_xfered, mrq->data->error); 123e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } 124e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 125e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->stop) { 126e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n", 127e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), mrq->stop->opcode, 128e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->stop->error, 129e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->stop->resp[0], mrq->stop->resp[1], 130e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->stop->resp[2], mrq->stop->resp[3]); 131e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } 132e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 133e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->done) 134e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->done(mrq); 13504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 13608c14071fda4e69abb9d5b1566651cd092b158d3Mika Westerberg mmc_host_clk_release(host); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_request_done); 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 142393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunkstatic void 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmmc_start_request(struct mmc_host *host, struct mmc_request *mrq) 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 145976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman#ifdef CONFIG_MMC_DEBUG 146976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman unsigned int i, sz; 147a84756c5735f28bf000617f18734a9e94426386aPierre Ossman struct scatterlist *sg; 148976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman#endif 149976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman 150920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King pr_debug("%s: starting CMD%u arg %08x flags %08x\n", 151920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_hostname(host), mrq->cmd->opcode, 152920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mrq->cmd->arg, mrq->cmd->flags); 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 154e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->data) { 155e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: blksz %d blocks %d flags %08x " 156e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman "tsac %d ms nsac %d\n", 157e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), mrq->data->blksz, 158e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->data->blocks, mrq->data->flags, 159ce252edd869ba1fee6a9a6f83e20f349d4c4d669Pierre Ossman mrq->data->timeout_ns / 1000000, 160e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->data->timeout_clks); 161e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } 162e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 163e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->stop) { 164e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: CMD%u arg %08x flags %08x\n", 165e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), mrq->stop->opcode, 166e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->stop->arg, mrq->stop->flags); 167e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } 168e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 169f22ee4edf63e7480511112d9965c71e07be3f8b7Pierre Ossman WARN_ON(!host->claimed); 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->cmd->error = 0; 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->cmd->mrq = mrq; 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mrq->data) { 174fe4a3c7a20f14d86022a8132adbf6ddb98e7197cPierre Ossman BUG_ON(mrq->data->blksz > host->max_blk_size); 17555db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman BUG_ON(mrq->data->blocks > host->max_blk_count); 17655db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman BUG_ON(mrq->data->blocks * mrq->data->blksz > 17755db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman host->max_req_size); 178fe4a3c7a20f14d86022a8132adbf6ddb98e7197cPierre Ossman 179976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman#ifdef CONFIG_MMC_DEBUG 180976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman sz = 0; 181a84756c5735f28bf000617f18734a9e94426386aPierre Ossman for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) 182a84756c5735f28bf000617f18734a9e94426386aPierre Ossman sz += sg->length; 183976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman BUG_ON(sz != mrq->data->blocks * mrq->data->blksz); 184976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman#endif 185976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->cmd->data = mrq->data; 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->data->error = 0; 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->data->mrq = mrq; 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mrq->stop) { 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->data->stop = mrq->stop; 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->stop->error = 0; 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->stop->mrq = mrq; 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19508c14071fda4e69abb9d5b1566651cd092b158d3Mika Westerberg mmc_host_clk_hold(host); 19666c036e0142fed2484d58a2d3c7a4d21ba32b6a6Pierre Tardy led_trigger_event(host->led, LED_FULL); 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ops->request(host, mrq); 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_wait_done(struct mmc_request *mrq) 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 202aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin complete(&mrq->completion); 203aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin} 204aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin 205aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlinstatic void __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) 206aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin{ 207aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin init_completion(&mrq->completion); 208aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin mrq->done = mmc_wait_done; 209aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin mmc_start_request(host, mrq); 210aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin} 211aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin 212aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlinstatic void mmc_wait_for_req_done(struct mmc_host *host, 213aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin struct mmc_request *mrq) 214aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin{ 215aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin wait_for_completion(&mrq->completion); 216aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin} 217aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin 218aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin/** 219aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * mmc_pre_req - Prepare for a new request 220aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * @host: MMC host to prepare command 221aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * @mrq: MMC request to prepare for 222aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * @is_first_req: true if there is no previous started request 223aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * that may run in parellel to this call, otherwise false 224aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * 225aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * mmc_pre_req() is called in prior to mmc_start_req() to let 226aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * host prepare for the new request. Preparation of a request may be 227aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * performed while another request is running on the host. 228aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin */ 229aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlinstatic void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq, 230aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin bool is_first_req) 231aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin{ 232aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin if (host->ops->pre_req) 233aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin host->ops->pre_req(host, mrq, is_first_req); 234aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin} 235aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin 236aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin/** 237aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * mmc_post_req - Post process a completed request 238aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * @host: MMC host to post process command 239aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * @mrq: MMC request to post process for 240aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * @err: Error, if non zero, clean up any resources made in pre_req 241aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * 242aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * Let the host post process a completed request. Post processing of 243aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * a request may be performed while another reuqest is running. 244aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin */ 245aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlinstatic void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, 246aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin int err) 247aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin{ 248aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin if (host->ops->post_req) 249aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin host->ops->post_req(host, mrq, err); 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25267a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman/** 253aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * mmc_start_req - start a non-blocking request 254aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * @host: MMC host to start command 255aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * @areq: async request to start 256aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * @error: out parameter returns 0 for success, otherwise non zero 257aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * 258aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * Start a new MMC custom command request for a host. 259aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * If there is on ongoing async request wait for completion 260aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * of that request and start the new one and return. 261aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * Does not wait for the new request to complete. 262aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * 263aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * Returns the completed request, NULL in case of none completed. 264aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * Wait for the an ongoing request (previoulsy started) to complete and 265aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * return the completed request. If there is no ongoing request, NULL 266aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin * is returned without waiting. NULL is not an error condition. 267aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin */ 268aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlinstruct mmc_async_req *mmc_start_req(struct mmc_host *host, 269aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin struct mmc_async_req *areq, int *error) 270aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin{ 271aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin int err = 0; 272aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin struct mmc_async_req *data = host->areq; 273aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin 274aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin /* Prepare a new request */ 275aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin if (areq) 276aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin mmc_pre_req(host, areq->mrq, !host->areq); 277aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin 278aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin if (host->areq) { 279aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin mmc_wait_for_req_done(host, host->areq->mrq); 280aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin err = host->areq->err_check(host->card, host->areq); 281aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin if (err) { 282aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin mmc_post_req(host, host->areq->mrq, 0); 283aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin if (areq) 284aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin mmc_post_req(host, areq->mrq, -EINVAL); 285aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin 286aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin host->areq = NULL; 287aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin goto out; 288aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin } 289aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin } 290aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin 291aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin if (areq) 292aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin __mmc_start_req(host, areq->mrq); 293aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin 294aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin if (host->areq) 295aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin mmc_post_req(host, host->areq->mrq, 0); 296aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin 297aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin host->areq = areq; 298aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin out: 299aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin if (error) 300aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin *error = err; 301aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin return data; 302aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin} 303aa8b683a7d392271ed349c6ab9f36b8c313794b7Per ForlinEXPORT_SYMBOL(mmc_start_req); 304aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin 305aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin/** 30667a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * mmc_wait_for_req - start a request and wait for completion 30767a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * @host: MMC host to start command 30867a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * @mrq: MMC request to start 30967a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * 31067a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * Start a new MMC custom command request for a host, and wait 31167a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * for the command to complete. Does not attempt to parse the 31267a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * response. 31367a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman */ 31467a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossmanvoid mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 316aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin __mmc_start_req(host, mrq); 317aa8b683a7d392271ed349c6ab9f36b8c313794b7Per Forlin mmc_wait_for_req_done(host, mrq); 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_wait_for_req); 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_wait_for_cmd - start a command and wait for completion 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: MMC host to start command 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @cmd: MMC command to start 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @retries: maximum number of retries 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Start a new MMC command for a host, and wait for the command 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to complete. Return any error that occurred while the command 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * was executing. Do not attempt to parse the response. 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 33324f5b53ba076e983bc64fa48534ca795d7813d51Chris Ball struct mmc_request mrq = {0}; 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 335d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(cmd->resp, 0, sizeof(cmd->resp)); 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->retries = retries; 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq.cmd = cmd; 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->data = NULL; 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_wait_for_req(host, &mrq); 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cmd->error; 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_wait_for_cmd); 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 350335eadf2ef6a1122a720aea98e758e5d431da87dPierre Ossman/** 351d773d7255199a6c8934e197756f54a1115dd127bRussell King * mmc_set_data_timeout - set the timeout for a data command 352d773d7255199a6c8934e197756f54a1115dd127bRussell King * @data: data phase for command 353d773d7255199a6c8934e197756f54a1115dd127bRussell King * @card: the MMC card associated with the data transfer 35467a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * 35567a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * Computes the data timeout parameters according to the 35667a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * correct algorithm given the card type. 357d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 358b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossmanvoid mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) 359d773d7255199a6c8934e197756f54a1115dd127bRussell King{ 360d773d7255199a6c8934e197756f54a1115dd127bRussell King unsigned int mult; 361d773d7255199a6c8934e197756f54a1115dd127bRussell King 362d773d7255199a6c8934e197756f54a1115dd127bRussell King /* 363e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman * SDIO cards only define an upper 1 s limit on access. 364e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman */ 365e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman if (mmc_card_sdio(card)) { 366e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman data->timeout_ns = 1000000000; 367e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman data->timeout_clks = 0; 368e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman return; 369e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman } 370e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman 371e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman /* 372d773d7255199a6c8934e197756f54a1115dd127bRussell King * SD cards use a 100 multiplier rather than 10 373d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 374d773d7255199a6c8934e197756f54a1115dd127bRussell King mult = mmc_card_sd(card) ? 100 : 10; 375d773d7255199a6c8934e197756f54a1115dd127bRussell King 376d773d7255199a6c8934e197756f54a1115dd127bRussell King /* 377d773d7255199a6c8934e197756f54a1115dd127bRussell King * Scale up the multiplier (and therefore the timeout) by 378d773d7255199a6c8934e197756f54a1115dd127bRussell King * the r2w factor for writes. 379d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 380b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossman if (data->flags & MMC_DATA_WRITE) 381d773d7255199a6c8934e197756f54a1115dd127bRussell King mult <<= card->csd.r2w_factor; 382d773d7255199a6c8934e197756f54a1115dd127bRussell King 383d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_ns = card->csd.tacc_ns * mult; 384d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_clks = card->csd.tacc_clks * mult; 385d773d7255199a6c8934e197756f54a1115dd127bRussell King 386d773d7255199a6c8934e197756f54a1115dd127bRussell King /* 387d773d7255199a6c8934e197756f54a1115dd127bRussell King * SD cards also have an upper limit on the timeout. 388d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 389d773d7255199a6c8934e197756f54a1115dd127bRussell King if (mmc_card_sd(card)) { 390d773d7255199a6c8934e197756f54a1115dd127bRussell King unsigned int timeout_us, limit_us; 391d773d7255199a6c8934e197756f54a1115dd127bRussell King 392d773d7255199a6c8934e197756f54a1115dd127bRussell King timeout_us = data->timeout_ns / 1000; 393e9b86841b372de01ae865080118e29159d8b7c39Linus Walleij if (mmc_host_clk_rate(card->host)) 394e9b86841b372de01ae865080118e29159d8b7c39Linus Walleij timeout_us += data->timeout_clks * 1000 / 395e9b86841b372de01ae865080118e29159d8b7c39Linus Walleij (mmc_host_clk_rate(card->host) / 1000); 396d773d7255199a6c8934e197756f54a1115dd127bRussell King 397b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossman if (data->flags & MMC_DATA_WRITE) 398493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman /* 399493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman * The limit is really 250 ms, but that is 400493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman * insufficient for some crappy cards. 401493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman */ 402493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman limit_us = 300000; 403d773d7255199a6c8934e197756f54a1115dd127bRussell King else 404d773d7255199a6c8934e197756f54a1115dd127bRussell King limit_us = 100000; 405d773d7255199a6c8934e197756f54a1115dd127bRussell King 406fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale /* 407fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale * SDHC cards always use these fixed values. 408fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale */ 409fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale if (timeout_us > limit_us || mmc_card_blockaddr(card)) { 410d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_ns = limit_us * 1000; 411d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_clks = 0; 412d773d7255199a6c8934e197756f54a1115dd127bRussell King } 413d773d7255199a6c8934e197756f54a1115dd127bRussell King } 414c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees /* 415c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * Some cards need very high timeouts if driven in SPI mode. 416c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * The worst observed timeout was 900ms after writing a 417c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * continuous stream of data until the internal logic 418c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * overflowed. 419c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees */ 420c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (mmc_host_is_spi(card->host)) { 421c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (data->flags & MMC_DATA_WRITE) { 422c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (data->timeout_ns < 1000000000) 423c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees data->timeout_ns = 1000000000; /* 1s */ 424c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees } else { 425c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (data->timeout_ns < 100000000) 426c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees data->timeout_ns = 100000000; /* 100ms */ 427c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees } 428c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees } 429d773d7255199a6c8934e197756f54a1115dd127bRussell King} 430d773d7255199a6c8934e197756f54a1115dd127bRussell KingEXPORT_SYMBOL(mmc_set_data_timeout); 431d773d7255199a6c8934e197756f54a1115dd127bRussell King 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 433ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * mmc_align_data_size - pads a transfer size to a more optimal value 434ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * @card: the MMC card associated with the data transfer 435ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * @sz: original transfer size 436ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * 437ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * Pads the original data size with a number of extra bytes in 438ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * order to avoid controller bugs and/or performance hits 439ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * (e.g. some controllers revert to PIO for certain sizes). 440ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * 441ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * Returns the improved size, which might be unmodified. 442ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * 443ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * Note that this function is only relevant when issuing a 444ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * single scatter gather entry. 445ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman */ 446ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossmanunsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) 447ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman{ 448ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman /* 449ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * FIXME: We don't have a system for the controller to tell 450ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * the core about its problems yet, so for now we just 32-bit 451ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * align the size. 452ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman */ 453ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman sz = ((sz + 3) / 4) * 4; 454ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman 455ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman return sz; 456ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman} 457ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre OssmanEXPORT_SYMBOL(mmc_align_data_size); 458ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman 459ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman/** 4608ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * mmc_host_enable - enable a host. 4618ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * @host: mmc host to enable 4628ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * 4638ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * Hosts that support power saving can use the 'enable' and 'disable' 4648ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * methods to exit and enter power saving states. For more information 4658ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * see comments for struct mmc_host_ops. 4668ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter */ 4678ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterint mmc_host_enable(struct mmc_host *host) 4688ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 4698ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!(host->caps & MMC_CAP_DISABLE)) 4708ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4718ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4728ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->en_dis_recurs) 4738ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4748ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4758ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->nesting_cnt++) 4768ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4778ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4788ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter cancel_delayed_work_sync(&host->disable); 4798ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4808ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->enabled) 4818ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4828ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4838ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->ops->enable) { 4848ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int err; 4858ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4868ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 1; 4878ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter err = host->ops->enable(host); 4888ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 0; 4898ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4908ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (err) { 4918ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter pr_debug("%s: enable error %d\n", 4928ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_hostname(host), err); 4938ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return err; 4948ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4958ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4968ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->enabled = 1; 4978ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4988ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 4998ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian HunterEXPORT_SYMBOL(mmc_host_enable); 5008ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5018ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterstatic int mmc_host_do_disable(struct mmc_host *host, int lazy) 5028ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 5038ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->ops->disable) { 5048ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int err; 5058ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5068ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 1; 5078ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter err = host->ops->disable(host, lazy); 5088ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 0; 5098ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5108ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (err < 0) { 5118ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter pr_debug("%s: disable error %d\n", 5128ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_hostname(host), err); 5138ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return err; 5148ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 5158ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (err > 0) { 5168ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter unsigned long delay = msecs_to_jiffies(err); 5178ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5188ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_schedule_delayed_work(&host->disable, delay); 5198ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 5208ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 5218ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->enabled = 0; 5228ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5238ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 5248ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5258ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter/** 5268ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * mmc_host_disable - disable a host. 5278ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * @host: mmc host to disable 5288ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * 5298ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * Hosts that support power saving can use the 'enable' and 'disable' 5308ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * methods to exit and enter power saving states. For more information 5318ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * see comments for struct mmc_host_ops. 5328ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter */ 5338ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterint mmc_host_disable(struct mmc_host *host) 5348ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 5358ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int err; 5368ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5378ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!(host->caps & MMC_CAP_DISABLE)) 5388ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5398ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5408ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->en_dis_recurs) 5418ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5428ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5438ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (--host->nesting_cnt) 5448ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5458ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5468ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!host->enabled) 5478ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5488ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5498ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter err = mmc_host_do_disable(host, 0); 5508ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return err; 5518ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 5528ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian HunterEXPORT_SYMBOL(mmc_host_disable); 5538ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5548ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter/** 5552342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * __mmc_claim_host - exclusively claim a host 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host to claim 5572342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * @abort: whether or not the operation should be aborted 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 5592342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * Claim a host for a set of operations. If @abort is non null and 5602342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * dereference a non-zero value then this will return prematurely with 5612342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * that non-zero value without acquiring the lock. Returns zero 5622342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * with the lock held otherwise. 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5642342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitreint __mmc_claim_host(struct mmc_host *host, atomic_t *abort) 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 5682342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre int stop; 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 570cf795bfb3ad4e2f8f6bb346aa8edb8272d4c70a2Pierre Ossman might_sleep(); 571cf795bfb3ad4e2f8f6bb346aa8edb8272d4c70a2Pierre Ossman 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&host->wq, &wait); 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&host->lock, flags); 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (1) { 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 5762342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre stop = abort ? atomic_read(abort) : 0; 577319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (stop || !host->claimed || host->claimer == current) 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&host->lock, flags); 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&host->lock, flags); 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_RUNNING); 584319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (!stop) { 5852342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre host->claimed = 1; 586319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimer = current; 587319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claim_cnt += 1; 588319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter } else 5892342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre wake_up(&host->wq); 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&host->lock, flags); 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&host->wq, &wait); 5928ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!stop) 5938ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_host_enable(host); 5942342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre return stop; 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5972342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas PitreEXPORT_SYMBOL(__mmc_claim_host); 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 599319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter/** 600319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * mmc_try_claim_host - try exclusively to claim a host 601319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * @host: mmc host to claim 602319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * 603319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * Returns %1 if the host is claimed, %0 otherwise. 604319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter */ 605319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunterint mmc_try_claim_host(struct mmc_host *host) 6068ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 6078ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int claimed_host = 0; 6088ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter unsigned long flags; 6098ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 6108ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter spin_lock_irqsave(&host->lock, flags); 611319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (!host->claimed || host->claimer == current) { 6128ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->claimed = 1; 613319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimer = current; 614319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claim_cnt += 1; 6158ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter claimed_host = 1; 6168ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 6178ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter spin_unlock_irqrestore(&host->lock, flags); 6188ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return claimed_host; 6198ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 620319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian HunterEXPORT_SYMBOL(mmc_try_claim_host); 6218ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 622ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson/** 623ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson * mmc_do_release_host - release a claimed host 624ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson * @host: mmc host to release 625ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson * 626ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson * If you successfully claimed a host, this function will 627ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson * release it again. 628ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson */ 629ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hanssonvoid mmc_do_release_host(struct mmc_host *host) 6308ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 6318ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter unsigned long flags; 6328ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 6338ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter spin_lock_irqsave(&host->lock, flags); 634319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (--host->claim_cnt) { 635319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter /* Release for nested claim */ 636319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter spin_unlock_irqrestore(&host->lock, flags); 637319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter } else { 638319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimed = 0; 639319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimer = NULL; 640319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter spin_unlock_irqrestore(&host->lock, flags); 641319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter wake_up(&host->wq); 642319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter } 6438ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 644ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf HanssonEXPORT_SYMBOL(mmc_do_release_host); 6458ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 6468ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Huntervoid mmc_host_deeper_disable(struct work_struct *work) 6478ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 6488ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter struct mmc_host *host = 6498ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter container_of(work, struct mmc_host, disable.work); 6508ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 6518ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter /* If the host is claimed then we do not want to disable it anymore */ 6528ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!mmc_try_claim_host(host)) 6538ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return; 6548ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_host_do_disable(host, 1); 6558ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_do_release_host(host); 6568ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 6578ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 6588ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter/** 6598ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * mmc_host_lazy_disable - lazily disable a host. 6608ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * @host: mmc host to disable 6618ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * 6628ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * Hosts that support power saving can use the 'enable' and 'disable' 6638ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * methods to exit and enter power saving states. For more information 6648ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * see comments for struct mmc_host_ops. 6658ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter */ 6668ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterint mmc_host_lazy_disable(struct mmc_host *host) 6678ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 6688ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!(host->caps & MMC_CAP_DISABLE)) 6698ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 6708ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 6718ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->en_dis_recurs) 6728ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 6738ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 6748ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (--host->nesting_cnt) 6758ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 6768ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 6778ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!host->enabled) 6788ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 6798ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 6808ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->disable_delay) { 6818ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_schedule_delayed_work(&host->disable, 6828ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter msecs_to_jiffies(host->disable_delay)); 6838ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 6848ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } else 6858ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return mmc_host_do_disable(host, 1); 6868ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 6878ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian HunterEXPORT_SYMBOL(mmc_host_lazy_disable); 6888ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_release_host - release a host 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host to release 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Release a MMC host, allowing others to claim the host 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for their operations. 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid mmc_release_host(struct mmc_host *host) 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 698d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7008ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_host_lazy_disable(host); 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7028ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_do_release_host(host); 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_release_host); 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7077ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 7087ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Internal function that does the actual ios call to the host driver, 7097ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * optionally printing some debug output. 7107ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 711920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell Kingstatic inline void mmc_set_ios(struct mmc_host *host) 712920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King{ 713920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King struct mmc_ios *ios = &host->ios; 714920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King 715cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " 716cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman "width %u timing %u\n", 717920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_hostname(host), ios->clock, ios->bus_mode, 718920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King ios->power_mode, ios->chip_select, ios->vdd, 719cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman ios->bus_width, ios->timing); 720fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale 72104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij if (ios->clock > 0) 72204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij mmc_set_ungated(host); 723920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King host->ops->set_ios(host, ios); 724920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King} 725920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King 7267ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 7277ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Control chip select pin on a host. 7287ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 729da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossmanvoid mmc_set_chip_select(struct mmc_host *host, int mode) 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 731778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_hold(host); 732da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman host->ios.chip_select = mode; 733da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman mmc_set_ios(host); 734778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_release(host); 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 7387ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Sets the host clock to the highest possible frequency that 7397ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * is below "hz". 7407ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 741778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerbergstatic void __mmc_set_clock(struct mmc_host *host, unsigned int hz) 7427ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 7437ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman WARN_ON(hz < host->f_min); 7447ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 7457ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (hz > host->f_max) 7467ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman hz = host->f_max; 7477ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 7487ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.clock = hz; 7497ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 7507ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 7517ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 752778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerbergvoid mmc_set_clock(struct mmc_host *host, unsigned int hz) 753778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg{ 754778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_hold(host); 755778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg __mmc_set_clock(host, hz); 756778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_release(host); 757778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg} 758778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg 75904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij#ifdef CONFIG_MMC_CLKGATE 76004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij/* 76104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * This gates the clock by setting it to 0 Hz. 76204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij */ 76304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleijvoid mmc_gate_clock(struct mmc_host *host) 76404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij{ 76504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij unsigned long flags; 76604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 76704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij spin_lock_irqsave(&host->clk_lock, flags); 76804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij host->clk_old = host->ios.clock; 76904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij host->ios.clock = 0; 77004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij host->clk_gated = true; 77104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij spin_unlock_irqrestore(&host->clk_lock, flags); 77204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij mmc_set_ios(host); 77304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij} 77404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 77504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij/* 77604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * This restores the clock from gating by using the cached 77704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * clock value. 77804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij */ 77904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleijvoid mmc_ungate_clock(struct mmc_host *host) 78004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij{ 78104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij /* 78204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * We should previously have gated the clock, so the clock shall 78304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * be 0 here! The clock may however be 0 during initialization, 78404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * when some request operations are performed before setting 78504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * the frequency. When ungate is requested in that situation 78604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * we just ignore the call. 78704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij */ 78804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij if (host->clk_old) { 78904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij BUG_ON(host->ios.clock); 79004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij /* This call will also set host->clk_gated to false */ 791778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg __mmc_set_clock(host, host->clk_old); 79204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij } 79304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij} 79404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 79504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleijvoid mmc_set_ungated(struct mmc_host *host) 79604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij{ 79704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij unsigned long flags; 79804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 79904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij /* 80004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * We've been given a new frequency while the clock is gated, 80104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * so make sure we regard this as ungating it. 80204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij */ 80304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij spin_lock_irqsave(&host->clk_lock, flags); 80404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij host->clk_gated = false; 80504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij spin_unlock_irqrestore(&host->clk_lock, flags); 80604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij} 80704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 80804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij#else 80904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleijvoid mmc_set_ungated(struct mmc_host *host) 81004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij{ 81104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij} 81204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij#endif 81304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 8147ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 8157ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Change the bus mode (open drain/push-pull) of a host. 8167ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 8177ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) 8187ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 819778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_hold(host); 8207ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.bus_mode = mode; 8217ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 822778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_release(host); 8237ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 8247ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 8257ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 8260f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter * Change data bus width of a host. 8270f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter */ 8280f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Huntervoid mmc_set_bus_width(struct mmc_host *host, unsigned int width) 8290f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter{ 830778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_hold(host); 8314c4cb171054230c2e58ed6574d7faa1871c75bbePhilip Rakity host->ios.bus_width = width; 8324c4cb171054230c2e58ed6574d7faa1871c75bbePhilip Rakity mmc_set_ios(host); 833778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_release(host); 8340f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter} 8350f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter 83686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov/** 83786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number 83886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @vdd: voltage (mV) 83986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @low_bits: prefer low bits in boundary cases 84086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 84186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * This function returns the OCR bit number according to the provided @vdd 84286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * value. If conversion is not possible a negative errno value returned. 84386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 84486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * Depending on the @low_bits flag the function prefers low or high OCR bits 84586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * on boundary voltages. For example, 84686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); 84786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); 84886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 84986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). 85086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov */ 85186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsovstatic int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) 85286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov{ 85386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov const int max_bit = ilog2(MMC_VDD_35_36); 85486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov int bit; 85586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 85686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd < 1650 || vdd > 3600) 85786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return -EINVAL; 85886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 85986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd >= 1650 && vdd <= 1950) 86086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return ilog2(MMC_VDD_165_195); 86186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 86286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (low_bits) 86386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov vdd -= 1; 86486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 86586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Base 2000 mV, step 100 mV, bit's base 8. */ 86686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov bit = (vdd - 2000) / 100 + 8; 86786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (bit > max_bit) 86886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return max_bit; 86986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return bit; 87086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov} 87186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 87286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov/** 87386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask 87486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @vdd_min: minimum voltage value (mV) 87586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @vdd_max: maximum voltage value (mV) 87686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 87786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * This function returns the OCR mask bits according to the provided @vdd_min 87886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * and @vdd_max values. If conversion is not possible the function returns 0. 87986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 88086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * Notes wrt boundary cases: 88186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * This function sets the OCR bits for all boundary voltages, for example 88286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | 88386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * MMC_VDD_34_35 mask. 88486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov */ 88586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsovu32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) 88686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov{ 88786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov u32 mask = 0; 88886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 88986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd_max < vdd_min) 89086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return 0; 89186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 89286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Prefer high bits for the boundary vdd_max values. */ 89386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); 89486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd_max < 0) 89586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return 0; 89686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 89786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Prefer low bits for the boundary vdd_min values. */ 89886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); 89986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd_min < 0) 90086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return 0; 90186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 90286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Fill the mask, from max bit to min bit. */ 90386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov while (vdd_max >= vdd_min) 90486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov mask |= 1 << vdd_max--; 90586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 90686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return mask; 90786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov} 90886e8286a0e48663e1e86a5884b30a6d05de2993aAnton VorontsovEXPORT_SYMBOL(mmc_vddrange_to_ocrmask); 90986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 9105c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell#ifdef CONFIG_REGULATOR 9115c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 9125c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell/** 9135c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * mmc_regulator_get_ocrmask - return mask of supported voltages 9145c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * @supply: regulator to use 9155c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * 9165c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * This returns either a negative errno, or a mask of voltages that 9175c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * can be provided to MMC/SD/SDIO devices using the specified voltage 9185c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * regulator. This would normally be called before registering the 9195c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * MMC host adapter. 9205c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 9215c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownellint mmc_regulator_get_ocrmask(struct regulator *supply) 9225c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell{ 9235c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int result = 0; 9245c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int count; 9255c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int i; 9265c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 9275c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell count = regulator_count_voltages(supply); 9285c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (count < 0) 9295c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell return count; 9305c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 9315c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell for (i = 0; i < count; i++) { 9325c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int vdd_uV; 9335c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int vdd_mV; 9345c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 9355c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell vdd_uV = regulator_list_voltage(supply, i); 9365c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (vdd_uV <= 0) 9375c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell continue; 9385c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 9395c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell vdd_mV = vdd_uV / 1000; 9405c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); 9415c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } 9425c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 9435c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell return result; 9445c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell} 9455c13941acc513669c7d07b28789c3f9ba66ddddfDavid BrownellEXPORT_SYMBOL(mmc_regulator_get_ocrmask); 9465c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 9475c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell/** 9485c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * mmc_regulator_set_ocr - set regulator to match host->ios voltage 94999fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij * @mmc: the host to regulate 9505c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * @supply: regulator to use 95199fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij * @vdd_bit: zero for power off, else a bit number (host->ios.vdd) 9525c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * 9535c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * Returns zero on success, else negative errno. 9545c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * 9555c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * MMC host drivers may use this to enable or disable a regulator using 9565c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * a particular supply voltage. This would normally be called from the 9575c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * set_ios() method. 9585c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 95999fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleijint mmc_regulator_set_ocr(struct mmc_host *mmc, 96099fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij struct regulator *supply, 96199fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij unsigned short vdd_bit) 9625c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell{ 9635c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int result = 0; 9645c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int min_uV, max_uV; 9655c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 9665c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (vdd_bit) { 9675c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int tmp; 9685c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int voltage; 9695c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 9705c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell /* REVISIT mmc_vddrange_to_ocrmask() may have set some 9715c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * bits this regulator doesn't quite support ... don't 9725c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * be too picky, most cards and regulators are OK with 9735c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * a 0.1V range goof (it's a small error percentage). 9745c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 9755c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell tmp = vdd_bit - ilog2(MMC_VDD_165_195); 9765c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (tmp == 0) { 9775c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell min_uV = 1650 * 1000; 9785c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell max_uV = 1950 * 1000; 9795c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } else { 9805c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell min_uV = 1900 * 1000 + tmp * 100 * 1000; 9815c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell max_uV = min_uV + 100 * 1000; 9825c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } 9835c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 9845c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell /* avoid needless changes to this voltage; the regulator 9855c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * might not allow this operation 9865c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 9875c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell voltage = regulator_get_voltage(supply); 9885c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (voltage < 0) 9895c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = voltage; 9905c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell else if (voltage < min_uV || voltage > max_uV) 9915c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = regulator_set_voltage(supply, min_uV, max_uV); 9925c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell else 9935c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = 0; 9945c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 99599fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij if (result == 0 && !mmc->regulator_enabled) { 9965c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = regulator_enable(supply); 99799fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij if (!result) 99899fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij mmc->regulator_enabled = true; 99999fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij } 100099fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij } else if (mmc->regulator_enabled) { 10015c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = regulator_disable(supply); 100299fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij if (result == 0) 100399fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij mmc->regulator_enabled = false; 10045c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } 10055c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 100699fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij if (result) 100799fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij dev_err(mmc_dev(mmc), 100899fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij "could not set regulator OCR (%d)\n", result); 10095c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell return result; 10105c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell} 10115c13941acc513669c7d07b28789c3f9ba66ddddfDavid BrownellEXPORT_SYMBOL(mmc_regulator_set_ocr); 10125c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 101399fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij#endif /* CONFIG_REGULATOR */ 10145c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 10157ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Mask off any voltages we don't support and select 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the lowest voltage 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10197ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanu32 mmc_select_voltage(struct mmc_host *host, u32 ocr) 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int bit; 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ocr &= host->ocr_avail; 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bit = ffs(ocr); 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bit) { 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bit -= 1; 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 102963ef731aa6a81e286de78dcc92241d123424ed39Timo Teras ocr &= 3 << bit; 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1031778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_hold(host); 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.vdd = bit; 1033920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 1034778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_release(host); 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 1036f6e10b865c3ea56bdaa8c6ecfee313b997900dbbDavid Brownell pr_warning("%s: host doesn't support card's voltages\n", 1037f6e10b865c3ea56bdaa8c6ecfee313b997900dbbDavid Brownell mmc_hostname(host)); 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ocr = 0; 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ocr; 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1044261bbd463a091b939770255d559bbc89b1bad568Philip Rakityint mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, bool cmd11) 1045f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath{ 1046f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath struct mmc_command cmd = {0}; 1047f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath int err = 0; 1048f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1049f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath BUG_ON(!host); 1050f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1051f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* 1052f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * Send CMD11 only if the request is to switch the card to 1053f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * 1.8V signalling. 1054f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath */ 1055261bbd463a091b939770255d559bbc89b1bad568Philip Rakity if ((signal_voltage != MMC_SIGNAL_VOLTAGE_330) && cmd11) { 1056f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath cmd.opcode = SD_SWITCH_VOLTAGE; 1057f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath cmd.arg = 0; 1058f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 1059f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1060f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath err = mmc_wait_for_cmd(host, &cmd, 0); 1061f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (err) 1062f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath return err; 1063f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1064f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) 1065f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath return -EIO; 1066f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath } 1067f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1068f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath host->ios.signal_voltage = signal_voltage; 1069f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1070f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (host->ops->start_signal_voltage_switch) 1071f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath err = host->ops->start_signal_voltage_switch(host, &host->ios); 1072f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 1073f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath return err; 1074f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath} 1075f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10777ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Select timing parameters for host. 1078b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman */ 10797ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_set_timing(struct mmc_host *host, unsigned int timing) 1080b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman{ 1081778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_hold(host); 10827ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.timing = timing; 10837ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 1084778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_release(host); 1085b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman} 1086b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 1087b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman/* 1088d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath * Select appropriate driver type for host. 1089d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath */ 1090d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nathvoid mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) 1091d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath{ 1092778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_hold(host); 1093d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath host->ios.drv_type = drv_type; 1094d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath mmc_set_ios(host); 1095778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_release(host); 1096d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath} 1097d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath 1098d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath/* 109945f8245b972e360c19aec9032e2a2033b8ac3719Russell King * Apply power to the MMC stack. This is a two-stage process. 110045f8245b972e360c19aec9032e2a2033b8ac3719Russell King * First, we enable power to the card without the clock running. 110145f8245b972e360c19aec9032e2a2033b8ac3719Russell King * We then wait a bit for the power to stabilise. Finally, 110245f8245b972e360c19aec9032e2a2033b8ac3719Russell King * enable the bus drivers and clock to the card. 110345f8245b972e360c19aec9032e2a2033b8ac3719Russell King * 110445f8245b972e360c19aec9032e2a2033b8ac3719Russell King * We must _NOT_ enable the clock prior to power stablising. 110545f8245b972e360c19aec9032e2a2033b8ac3719Russell King * 110645f8245b972e360c19aec9032e2a2033b8ac3719Russell King * If a host does all the power sequencing itself, ignore the 110745f8245b972e360c19aec9032e2a2033b8ac3719Russell King * initial MMC_POWER_UP stage. 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_power_up(struct mmc_host *host) 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1111500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao int bit; 1112500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao 1113778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_hold(host); 1114778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg 1115500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao /* If ocr is set, we use it */ 1116500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao if (host->ocr) 1117500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao bit = ffs(host->ocr) - 1; 1118500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao else 1119500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao bit = fls(host->ocr_avail) - 1; 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.vdd = bit; 1122af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (mmc_host_is_spi(host)) { 1123af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.chip_select = MMC_CS_HIGH; 1124af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; 1125af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } else { 1126af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.chip_select = MMC_CS_DONTCARE; 1127af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; 1128af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.power_mode = MMC_POWER_UP; 1130f218278a456b3c272b480443c89004c3d2a49f18Pierre Ossman host->ios.bus_width = MMC_BUS_WIDTH_1; 1131cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman host->ios.timing = MMC_TIMING_LEGACY; 1132920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1134f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman /* 1135f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * This delay should be sufficient to allow the power supply 1136f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * to reach the minimum voltage. 1137f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman */ 113879bccc5aefb4e64e651abe04f78c3e6bf8acd6f0José M. Fernández mmc_delay(10); 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 114088ae8b866488031b0e2fc05a27440fefec5e6927Hein Tibosch host->ios.clock = host->f_init; 11418dfd0374be84793360db7fff2e635d2cd3bbcb21Sascha Hauer 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.power_mode = MMC_POWER_ON; 1143920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1145f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman /* 1146f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * This delay must be at least 74 clock sizes, or 1 ms, or the 1147f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * time required to reach a stable voltage. 1148f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman */ 114979bccc5aefb4e64e651abe04f78c3e6bf8acd6f0José M. Fernández mmc_delay(10); 1150778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg 1151778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_release(host); 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_power_off(struct mmc_host *host) 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1156778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_hold(host); 1157778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.clock = 0; 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.vdd = 0; 1160b33d46c398fd071dccd0815f33620924684860cdUlf Hansson 1161b33d46c398fd071dccd0815f33620924684860cdUlf Hansson /* 1162b33d46c398fd071dccd0815f33620924684860cdUlf Hansson * Reset ocr mask to be the highest possible voltage supported for 1163b33d46c398fd071dccd0815f33620924684860cdUlf Hansson * this mmc host. This value will be used at next power up. 1164b33d46c398fd071dccd0815f33620924684860cdUlf Hansson */ 1165b33d46c398fd071dccd0815f33620924684860cdUlf Hansson host->ocr = 1 << (fls(host->ocr_avail) - 1); 1166b33d46c398fd071dccd0815f33620924684860cdUlf Hansson 1167af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (!mmc_host_is_spi(host)) { 1168af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; 1169af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.chip_select = MMC_CS_DONTCARE; 1170af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.power_mode = MMC_POWER_OFF; 1172f218278a456b3c272b480443c89004c3d2a49f18Pierre Ossman host->ios.bus_width = MMC_BUS_WIDTH_1; 1173cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman host->ios.timing = MMC_TIMING_LEGACY; 1174920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 1175778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg 1176778e277cb82411c9002ca28ccbd216c4d9eb9158Mika Westerberg mmc_host_clk_release(host); 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1180393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * Cleanup when the last reference to the bus operator is dropped. 1181393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk */ 1182261172fd1b23769bc7632047e2cb826c9b8b1a50Adrian Bunkstatic void __mmc_release_bus(struct mmc_host *host) 1183393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk{ 1184393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk BUG_ON(!host); 1185393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk BUG_ON(host->bus_refs); 1186393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk BUG_ON(!host->bus_dead); 1187393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1188393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk host->bus_ops = NULL; 1189393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk} 1190393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1191393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk/* 1192393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * Increase reference count of bus operator 1193393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk */ 1194393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunkstatic inline void mmc_bus_get(struct mmc_host *host) 1195393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk{ 1196393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk unsigned long flags; 1197393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1198393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_lock_irqsave(&host->lock, flags); 1199393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk host->bus_refs++; 1200393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_unlock_irqrestore(&host->lock, flags); 1201393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk} 1202393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1203393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk/* 1204393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * Decrease reference count of bus operator and free it if 1205393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * it is the last reference. 1206393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk */ 1207393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunkstatic inline void mmc_bus_put(struct mmc_host *host) 1208393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk{ 1209393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk unsigned long flags; 1210393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1211393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_lock_irqsave(&host->lock, flags); 1212393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk host->bus_refs--; 1213393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk if ((host->bus_refs == 0) && host->bus_ops) 1214393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk __mmc_release_bus(host); 1215393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_unlock_irqrestore(&host->lock, flags); 1216393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk} 1217393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1218393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk/* 12197ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Assign a mmc bus handler to a host. Only one bus handler may control a 12207ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * host at any given time. 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12227ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12247ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman unsigned long flags; 1225e45a1bd20fa5b920901879e85cdf5eda21f78d7cPhilip Langdale 12267ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(!host); 12277ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(!ops); 1228b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman 1229d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 1230bce40a36de574376f41f1ff3c4d212a7da2a3c90Philip Langdale 12317ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_lock_irqsave(&host->lock, flags); 1232bce40a36de574376f41f1ff3c4d212a7da2a3c90Philip Langdale 12337ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(host->bus_ops); 12347ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(host->bus_refs); 1235b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 12367ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_ops = ops; 12377ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_refs = 1; 12387ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_dead = 0; 1239b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 12407ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_unlock_irqrestore(&host->lock, flags); 1241b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman} 1242b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 12437ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 12447ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Remove the current bus handler from a host. Assumes that there are 12457ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * no interesting cards left, so the bus is powered down. 12467ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 12477ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_detach_bus(struct mmc_host *host) 12487ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman{ 12497ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman unsigned long flags; 12507ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 12517ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(!host); 12527ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 1253d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 1254d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->bus_ops); 1255cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman 12567ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_lock_irqsave(&host->lock, flags); 12577ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 12587ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_dead = 1; 12597ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 12607ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_unlock_irqrestore(&host->lock, flags); 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12627ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_power_off(host); 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12647ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 12681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_detect_change - process change of state on a MMC socket 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: host which changed state. 12708dc003359cc3996abad9e53a7b2280b272610283Richard Purdie * @delay: optional delay to wait before detection (jiffies) 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 127267a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * MMC drivers should call this when they detect a card has been 127367a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * inserted or removed. The MMC layer will confirm that any 127467a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * present card is still functional, and initialize any newly 127567a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * inserted. 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12778dc003359cc3996abad9e53a7b2280b272610283Richard Purdievoid mmc_detect_change(struct mmc_host *host, unsigned long delay) 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12793b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#ifdef CONFIG_MMC_DEBUG 12801efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman unsigned long flags; 128101f41ec7b36e14da18a4e162ef697ae358f36e37Andrew Morton spin_lock_irqsave(&host->lock, flags); 1282d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(host->removed); 128301f41ec7b36e14da18a4e162ef697ae358f36e37Andrew Morton spin_unlock_irqrestore(&host->lock, flags); 12843b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#endif 12853b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman 1286c4028958b6ecad064b1a6303a6a5906d4fe48d73David Howells mmc_schedule_delayed_work(&host->detect, delay); 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_detect_change); 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1291dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Huntervoid mmc_init_erase(struct mmc_card *card) 1292dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1293dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int sz; 1294dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1295dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (is_power_of_2(card->erase_size)) 1296dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->erase_shift = ffs(card->erase_size) - 1; 1297dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1298dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->erase_shift = 0; 1299dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1300dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1301dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * It is possible to erase an arbitrarily large area of an SD or MMC 1302dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * card. That is not desirable because it can take a long time 1303dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * (minutes) potentially delaying more important I/O, and also the 1304dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * timeout calculations become increasingly hugely over-estimated. 1305dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Consequently, 'pref_erase' is defined as a guide to limit erases 1306dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * to that size and alignment. 1307dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * 1308dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * For SD cards that define Allocation Unit size, limit erases to one 1309dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Allocation Unit at a time. For MMC cards that define High Capacity 1310dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Erase Size, whether it is switched on or not, limit to that size. 1311dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Otherwise just have a stab at a good value. For modern cards it 1312dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * will end up being 4MiB. Note that if the value is too small, it 1313dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * can end up taking longer to erase. 1314dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1315dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card) && card->ssr.au) { 1316dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = card->ssr.au; 1317dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->erase_shift = ffs(card->ssr.au) - 1; 1318dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else if (card->ext_csd.hc_erase_size) { 1319dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = card->ext_csd.hc_erase_size; 1320dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else { 1321dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; 1322dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (sz < 128) 1323dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = 512 * 1024 / 512; 1324dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else if (sz < 512) 1325dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = 1024 * 1024 / 512; 1326dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else if (sz < 1024) 1327dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = 2 * 1024 * 1024 / 512; 1328dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1329dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = 4 * 1024 * 1024 / 512; 1330dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->pref_erase < card->erase_size) 1331dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = card->erase_size; 1332dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else { 1333dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter sz = card->pref_erase % card->erase_size; 1334dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (sz) 1335dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase += card->erase_size - sz; 1336dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1337dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1338dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1339dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1340eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentinstatic unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, 1341eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin unsigned int arg, unsigned int qty) 1342dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1343dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int erase_timeout; 1344dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1345dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->ext_csd.erase_group_def & 1) { 1346dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* High Capacity Erase Group Size uses HC timeouts */ 1347dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg == MMC_TRIM_ARG) 1348dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = card->ext_csd.trim_timeout; 1349dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1350dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = card->ext_csd.hc_erase_timeout; 1351dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else { 1352dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* CSD Erase Group Size uses write timeout */ 1353dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int mult = (10 << card->csd.r2w_factor); 1354dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int timeout_clks = card->csd.tacc_clks * mult; 1355dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int timeout_us; 1356dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1357dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */ 1358dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->csd.tacc_ns < 1000000) 1359dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter timeout_us = (card->csd.tacc_ns * mult) / 1000; 1360dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1361dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter timeout_us = (card->csd.tacc_ns / 1000) * mult; 1362dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1363dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1364dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * ios.clock is only a target. The real clock rate might be 1365dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * less but not that much less, so fudge it by multiplying by 2. 1366dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1367dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter timeout_clks <<= 1; 1368dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter timeout_us += (timeout_clks * 1000) / 13694cf8c6dd2e261da94b87c4deadcc136ab022b6acAdrian Hunter (mmc_host_clk_rate(card->host) / 1000); 1370dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1371dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = timeout_us / 1000; 1372dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1373dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1374dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Theoretically, the calculation could underflow so round up 1375dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * to 1ms in that case. 1376dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1377dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!erase_timeout) 1378dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = 1; 1379dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1380dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1381dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Multiplier for secure operations */ 1382dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg & MMC_SECURE_ARGS) { 1383dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg == MMC_SECURE_ERASE_ARG) 1384dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout *= card->ext_csd.sec_erase_mult; 1385dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1386dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout *= card->ext_csd.sec_trim_mult; 1387dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1388dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1389dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout *= qty; 1390dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1391dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1392dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Ensure at least a 1 second timeout for SPI as per 1393dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * 'mmc_set_data_timeout()' 1394dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1395dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_host_is_spi(card->host) && erase_timeout < 1000) 1396dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = 1000; 1397dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1398eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin return erase_timeout; 1399dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1400dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1401eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentinstatic unsigned int mmc_sd_erase_timeout(struct mmc_card *card, 1402eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin unsigned int arg, 1403eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin unsigned int qty) 1404dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1405eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin unsigned int erase_timeout; 1406eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin 1407dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->ssr.erase_timeout) { 1408dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Erase timeout specified in SD Status Register (SSR) */ 1409eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin erase_timeout = card->ssr.erase_timeout * qty + 1410eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin card->ssr.erase_offset; 1411dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else { 1412dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1413dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Erase timeout not specified in SD Status Register (SSR) so 1414dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * use 250ms per write block. 1415dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1416eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin erase_timeout = 250 * qty; 1417dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1418dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1419dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Must not be less than 1 second */ 1420eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin if (erase_timeout < 1000) 1421eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin erase_timeout = 1000; 1422eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin 1423eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin return erase_timeout; 1424dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1425dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1426eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentinstatic unsigned int mmc_erase_timeout(struct mmc_card *card, 1427eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin unsigned int arg, 1428eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin unsigned int qty) 1429dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1430dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card)) 1431eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin return mmc_sd_erase_timeout(card, arg, qty); 1432dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1433eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin return mmc_mmc_erase_timeout(card, arg, qty); 1434dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1435dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1436dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterstatic int mmc_do_erase(struct mmc_card *card, unsigned int from, 1437dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int to, unsigned int arg) 1438dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 14391278dba167f01bb3c6626d16450d31129d041087Chris Ball struct mmc_command cmd = {0}; 1440dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int qty = 0; 1441dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter int err; 1442dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1443dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1444dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * qty is used to calculate the erase timeout which depends on how many 1445dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * erase groups (or allocation units in SD terminology) are affected. 1446dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * We count erasing part of an erase group as one erase group. 1447dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * For SD, the allocation units are always a power of 2. For MMC, the 1448dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * erase group size is almost certainly also power of 2, but it does not 1449dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * seem to insist on that in the JEDEC standard, so we fall back to 1450dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * division in that case. SD may not specify an allocation unit size, 1451dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * in which case the timeout is based on the number of write blocks. 1452dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * 1453dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Note that the timeout for secure trim 2 will only be correct if the 1454dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * number of erase groups specified is the same as the total of all 1455dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * preceding secure trim 1 commands. Since the power may have been 1456dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * lost since the secure trim 1 commands occurred, it is generally 1457dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * impossible to calculate the secure trim 2 timeout correctly. 1458dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1459dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->erase_shift) 1460dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter qty += ((to >> card->erase_shift) - 1461dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter (from >> card->erase_shift)) + 1; 1462dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else if (mmc_card_sd(card)) 1463dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter qty += to - from + 1; 1464dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1465dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter qty += ((to / card->erase_size) - 1466dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter (from / card->erase_size)) + 1; 1467dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1468dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!mmc_card_blockaddr(card)) { 1469dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter from <<= 9; 1470dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter to <<= 9; 1471dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1472dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1473dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card)) 1474dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = SD_ERASE_WR_BLK_START; 1475dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1476dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = MMC_ERASE_GROUP_START; 1477dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.arg = from; 1478dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; 1479dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_wait_for_cmd(card->host, &cmd, 0); 1480dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err) { 1481dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_ERR "mmc_erase: group start error %d, " 1482dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter "status %#x\n", err, cmd.resp[0]); 1483dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = -EINVAL; 1484dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1485dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1486dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1487dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter memset(&cmd, 0, sizeof(struct mmc_command)); 1488dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card)) 1489dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = SD_ERASE_WR_BLK_END; 1490dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1491dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = MMC_ERASE_GROUP_END; 1492dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.arg = to; 1493dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; 1494dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_wait_for_cmd(card->host, &cmd, 0); 1495dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err) { 1496dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_ERR "mmc_erase: group end error %d, status %#x\n", 1497dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err, cmd.resp[0]); 1498dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = -EINVAL; 1499dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1500dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1501dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1502dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter memset(&cmd, 0, sizeof(struct mmc_command)); 1503dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = MMC_ERASE; 1504dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.arg = arg; 1505dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; 1506eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin cmd.cmd_timeout_ms = mmc_erase_timeout(card, arg, qty); 1507dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_wait_for_cmd(card->host, &cmd, 0); 1508dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err) { 1509dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_ERR "mmc_erase: erase error %d, status %#x\n", 1510dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err, cmd.resp[0]); 1511dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = -EIO; 1512dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1513dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1514dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1515dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_host_is_spi(card->host)) 1516dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1517dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1518dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter do { 1519dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter memset(&cmd, 0, sizeof(struct mmc_command)); 1520dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = MMC_SEND_STATUS; 1521dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.arg = card->rca << 16; 1522dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 1523dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Do not retry else we can't see errors */ 1524dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_wait_for_cmd(card->host, &cmd, 0); 1525dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err || (cmd.resp[0] & 0xFDF92000)) { 1526dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_ERR "error %d requesting status %#x\n", 1527dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err, cmd.resp[0]); 1528dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = -EIO; 1529dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1530dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1531dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || 15327435bb7950ba8a3cbfa6d0c01e92588562533a3fJaehoon Chung R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG); 1533dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterout: 1534dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return err; 1535dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1536dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1537dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter/** 1538dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * mmc_erase - erase sectors. 1539dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * @card: card to erase 1540dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * @from: first sector to erase 1541dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * @nr: number of sectors to erase 1542dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * @arg: erase command argument (SD supports only %MMC_ERASE_ARG) 1543dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * 1544dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Caller must claim host before calling this function. 1545dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1546dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, 1547dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int arg) 1548dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1549dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int rem, to = from + nr; 1550dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1551dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!(card->host->caps & MMC_CAP_ERASE) || 1552dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter !(card->csd.cmdclass & CCC_ERASE)) 1553dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1554dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1555dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!card->erase_size) 1556dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1557dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1558dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card) && arg != MMC_ERASE_ARG) 1559dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1560dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1561dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if ((arg & MMC_SECURE_ARGS) && 1562dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) 1563dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1564dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1565dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if ((arg & MMC_TRIM_ARGS) && 1566dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) 1567dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1568dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1569dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg == MMC_SECURE_ERASE_ARG) { 1570dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (from % card->erase_size || nr % card->erase_size) 1571dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EINVAL; 1572dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1573dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1574dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg == MMC_ERASE_ARG) { 1575dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter rem = from % card->erase_size; 1576dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (rem) { 1577dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter rem = card->erase_size - rem; 1578dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter from += rem; 1579dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (nr > rem) 1580dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter nr -= rem; 1581dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1582dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1583dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1584dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter rem = nr % card->erase_size; 1585dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (rem) 1586dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter nr -= rem; 1587dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1588dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1589dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (nr == 0) 1590dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1591dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1592dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter to = from + nr; 1593dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1594dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (to <= from) 1595dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EINVAL; 1596dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1597dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 'from' and 'to' are inclusive */ 1598dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter to -= 1; 1599dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1600dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return mmc_do_erase(card, from, to, arg); 1601dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1602dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_erase); 1603dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1604dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_can_erase(struct mmc_card *card) 1605dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1606dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if ((card->host->caps & MMC_CAP_ERASE) && 1607dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter (card->csd.cmdclass & CCC_ERASE) && card->erase_size) 1608dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 1; 1609dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1610dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1611dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_can_erase); 1612dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1613dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_can_trim(struct mmc_card *card) 1614dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1615dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) 1616dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 1; 1617dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1618dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1619dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_can_trim); 1620dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1621dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_can_secure_erase_trim(struct mmc_card *card) 1622dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1623dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) 1624dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 1; 1625dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1626dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1627dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_can_secure_erase_trim); 1628dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1629dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, 1630dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int nr) 1631dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1632dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!card->erase_size) 1633dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1634dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (from % card->erase_size || nr % card->erase_size) 1635dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1636dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 1; 1637dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1638dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_erase_group_aligned); 16391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1640e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunterstatic unsigned int mmc_do_calc_max_discard(struct mmc_card *card, 1641e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter unsigned int arg) 1642e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter{ 1643e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter struct mmc_host *host = card->host; 1644e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter unsigned int max_discard, x, y, qty = 0, max_qty, timeout; 1645e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter unsigned int last_timeout = 0; 1646e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter 1647e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter if (card->erase_shift) 1648e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter max_qty = UINT_MAX >> card->erase_shift; 1649e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter else if (mmc_card_sd(card)) 1650e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter max_qty = UINT_MAX; 1651e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter else 1652e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter max_qty = UINT_MAX / card->erase_size; 1653e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter 1654e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter /* Find the largest qty with an OK timeout */ 1655e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter do { 1656e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter y = 0; 1657e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) { 1658e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter timeout = mmc_erase_timeout(card, arg, qty + x); 1659e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter if (timeout > host->max_discard_to) 1660e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter break; 1661e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter if (timeout < last_timeout) 1662e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter break; 1663e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter last_timeout = timeout; 1664e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter y = x; 1665e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter } 1666e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter qty += y; 1667e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter } while (y); 1668e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter 1669e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter if (!qty) 1670e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter return 0; 1671e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter 1672e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter if (qty == 1) 1673e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter return 1; 1674e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter 1675e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter /* Convert qty to sectors */ 1676e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter if (card->erase_shift) 1677e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter max_discard = --qty << card->erase_shift; 1678e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter else if (mmc_card_sd(card)) 1679e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter max_discard = qty; 1680e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter else 1681e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter max_discard = --qty * card->erase_size; 1682e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter 1683e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter return max_discard; 1684e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter} 1685e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter 1686e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunterunsigned int mmc_calc_max_discard(struct mmc_card *card) 1687e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter{ 1688e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter struct mmc_host *host = card->host; 1689e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter unsigned int max_discard, max_trim; 1690e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter 1691e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter if (!host->max_discard_to) 1692e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter return UINT_MAX; 1693e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter 1694e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter /* 1695e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter * Without erase_group_def set, MMC erase timeout depends on clock 1696e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter * frequence which can change. In that case, the best choice is 1697e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter * just the preferred erase size. 1698e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter */ 1699e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1)) 1700e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter return card->pref_erase; 1701e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter 1702e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG); 1703e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter if (mmc_can_trim(card)) { 1704e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG); 1705e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter if (max_trim < max_discard) 1706e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter max_discard = max_trim; 1707e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter } else if (max_discard < card->erase_size) { 1708e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter max_discard = 0; 1709e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter } 1710e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n", 1711e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter mmc_hostname(host), max_discard, host->max_discard_to); 1712e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter return max_discard; 1713e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter} 1714e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian HunterEXPORT_SYMBOL(mmc_calc_max_discard); 1715e056a1b5b67b4e4bfad00bf143ab14f634777705Adrian Hunter 17160f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunterint mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) 17170f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter{ 17181278dba167f01bb3c6626d16450d31129d041087Chris Ball struct mmc_command cmd = {0}; 17190f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter 17200f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter if (mmc_card_blockaddr(card) || mmc_card_ddr_mode(card)) 17210f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter return 0; 17220f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter 17230f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter cmd.opcode = MMC_SET_BLOCKLEN; 17240f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter cmd.arg = blocklen; 17250f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; 17260f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter return mmc_wait_for_cmd(card->host, &cmd, 5); 17270f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter} 17280f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian HunterEXPORT_SYMBOL(mmc_set_blocklen); 17290f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter 1730807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Rossstatic int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) 1731807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross{ 1732807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross host->f_init = freq; 1733807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1734807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross#ifdef CONFIG_MMC_DEBUG 1735807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross pr_info("%s: %s: trying to init card at %u Hz\n", 1736807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_hostname(host), __func__, host->f_init); 1737807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross#endif 1738807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_power_up(host); 17392f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity 17402f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity /* 17412f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity * sdio_reset sends CMD52 to reset card. Since we do not know 17422f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity * if the card is being re-initialized, just send it. CMD52 17432f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity * should be ignored by SD/eMMC cards. 17442f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity */ 1745807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross sdio_reset(host); 1746807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_go_idle(host); 1747807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1748807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_send_if_cond(host, host->ocr_avail); 1749807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1750807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross /* Order's important: probe SDIO, then SD, then MMC */ 1751807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (!mmc_attach_sdio(host)) 1752807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross return 0; 1753807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (!mmc_attach_sd(host)) 1754807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross return 0; 1755807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (!mmc_attach_mmc(host)) 1756807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross return 0; 1757807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1758807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_power_off(host); 1759807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross return -EIO; 1760807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross} 1761807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1762b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossmanvoid mmc_rescan(struct work_struct *work) 17631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1764807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; 1765c4028958b6ecad064b1a6303a6a5906d4fe48d73David Howells struct mmc_host *host = 1766c4028958b6ecad064b1a6303a6a5906d4fe48d73David Howells container_of(work, struct mmc_host, detect.work); 176788ae8b866488031b0e2fc05a27440fefec5e6927Hein Tibosch int i; 17684c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 1769807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (host->rescan_disable) 17704c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky return; 17711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17727ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_get(host); 1773b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman 177430201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen /* 177530201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen * if there is a _removable_ card registered, check whether it is 177630201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen * still present 177730201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen */ 177830201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen if (host->bus_ops && host->bus_ops->detect && !host->bus_dead 1779bad3babace2ee4d1763b4016a662a5c660ab92e9Ohad Ben-Cohen && !(host->caps & MMC_CAP_NONREMOVABLE)) 178094d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer host->bus_ops->detect(host); 178194d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer 1782c584179828b268152f5ff82dab529a2c095b09acChris Ball /* 1783c584179828b268152f5ff82dab529a2c095b09acChris Ball * Let mmc_bus_put() free the bus/bus_ops if we've found that 1784c584179828b268152f5ff82dab529a2c095b09acChris Ball * the card is no longer present. 1785c584179828b268152f5ff82dab529a2c095b09acChris Ball */ 178694d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_bus_put(host); 178794d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_bus_get(host); 178894d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer 178994d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer /* if there still is a card present, stop here */ 179094d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (host->bus_ops != NULL) { 17917ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 179294d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer goto out; 179394d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer } 17941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 179594d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer /* 179694d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer * Only we can add a new handler, so it's safe to 179794d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer * release the lock here. 179894d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer */ 179994d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_bus_put(host); 18001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 180194d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (host->ops->get_cd && host->ops->get_cd(host) == 0) 180294d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer goto out; 18031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1804807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_claim_host(host); 180588ae8b866488031b0e2fc05a27440fefec5e6927Hein Tibosch for (i = 0; i < ARRAY_SIZE(freqs); i++) { 1806807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) 1807807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross break; 180806b2233a20bf25c8ee57b7c6e13f528309ac6edcJaehoon Chung if (freqs[i] <= host->f_min) 1809807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross break; 181088ae8b866488031b0e2fc05a27440fefec5e6927Hein Tibosch } 1811807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_release_host(host); 1812807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1813807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross out: 181428f52482b41edc88cdf575aa6ed414c6e116ce10Anton Vorontsov if (host->caps & MMC_CAP_NEEDS_POLL) 181528f52482b41edc88cdf575aa6ed414c6e116ce10Anton Vorontsov mmc_schedule_delayed_work(&host->detect, HZ); 18161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1818b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossmanvoid mmc_start_host(struct mmc_host *host) 18191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1820b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossman mmc_power_off(host); 1821b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossman mmc_detect_change(host, 0); 18221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1824b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossmanvoid mmc_stop_host(struct mmc_host *host) 18251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18263b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#ifdef CONFIG_MMC_DEBUG 18271efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman unsigned long flags; 18281efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman spin_lock_irqsave(&host->lock, flags); 18293b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman host->removed = 1; 18301efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman spin_unlock_irqrestore(&host->lock, flags); 18313b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#endif 18323b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman 18338ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->caps & MMC_CAP_DISABLE) 18348ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter cancel_delayed_work(&host->disable); 1835d9bcbf343ec63e1104b5276195888ee06b4d086fGuennadi Liakhovetski cancel_delayed_work_sync(&host->detect); 18363b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman mmc_flush_scheduled_work(); 18373b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman 1838da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre /* clear pm flags now and let card drivers set them as needed */ 1839da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre host->pm_flags = 0; 1840da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre 18417ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_get(host); 18427ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (host->bus_ops && !host->bus_dead) { 18437ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (host->bus_ops->remove) 18447ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_ops->remove(host); 18457ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 18467ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_claim_host(host); 18477ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_detach_bus(host); 18487ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_release_host(host); 184953509f0fe28e049e772897aa8fa1f5183b6823a2Denis Karpov mmc_bus_put(host); 185053509f0fe28e049e772897aa8fa1f5183b6823a2Denis Karpov return; 18511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18527ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 18537ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 18547ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(host->card); 18551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_power_off(host); 18571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 185912ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohenint mmc_power_save_host(struct mmc_host *host) 1860eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter{ 186112ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen int ret = 0; 186212ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen 1863bb9cab941c7139304899fa7922f3069bb2097f4eDaniel Drake#ifdef CONFIG_MMC_DEBUG 1864bb9cab941c7139304899fa7922f3069bb2097f4eDaniel Drake pr_info("%s: %s: powering down\n", mmc_hostname(host), __func__); 1865bb9cab941c7139304899fa7922f3069bb2097f4eDaniel Drake#endif 1866bb9cab941c7139304899fa7922f3069bb2097f4eDaniel Drake 1867eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_get(host); 1868eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1869eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) { 1870eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_put(host); 187112ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen return -EINVAL; 1872eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter } 1873eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1874eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter if (host->bus_ops->power_save) 187512ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen ret = host->bus_ops->power_save(host); 1876eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1877eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_put(host); 1878eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1879eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_power_off(host); 188012ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen 188112ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen return ret; 1882eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter} 1883eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian HunterEXPORT_SYMBOL(mmc_power_save_host); 1884eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 188512ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohenint mmc_power_restore_host(struct mmc_host *host) 1886eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter{ 188712ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen int ret; 188812ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen 1889bb9cab941c7139304899fa7922f3069bb2097f4eDaniel Drake#ifdef CONFIG_MMC_DEBUG 1890bb9cab941c7139304899fa7922f3069bb2097f4eDaniel Drake pr_info("%s: %s: powering up\n", mmc_hostname(host), __func__); 1891bb9cab941c7139304899fa7922f3069bb2097f4eDaniel Drake#endif 1892bb9cab941c7139304899fa7922f3069bb2097f4eDaniel Drake 1893eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_get(host); 1894eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1895eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) { 1896eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_put(host); 189712ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen return -EINVAL; 1898eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter } 1899eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1900eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_power_up(host); 190112ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen ret = host->bus_ops->power_restore(host); 1902eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1903eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_put(host); 190412ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen 190512ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen return ret; 1906eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter} 1907eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian HunterEXPORT_SYMBOL(mmc_power_restore_host); 1908eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1909b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinenint mmc_card_awake(struct mmc_host *host) 1910b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen{ 1911b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen int err = -ENOSYS; 1912b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1913b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen mmc_bus_get(host); 1914b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1915b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen if (host->bus_ops && !host->bus_dead && host->bus_ops->awake) 1916b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen err = host->bus_ops->awake(host); 1917b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1918b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen mmc_bus_put(host); 1919b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1920b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen return err; 1921b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen} 1922b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko LavinenEXPORT_SYMBOL(mmc_card_awake); 1923b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1924b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinenint mmc_card_sleep(struct mmc_host *host) 1925b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen{ 1926b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen int err = -ENOSYS; 1927b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1928b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen mmc_bus_get(host); 1929b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1930b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen if (host->bus_ops && !host->bus_dead && host->bus_ops->awake) 1931b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen err = host->bus_ops->sleep(host); 1932b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1933b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen mmc_bus_put(host); 1934b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1935b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen return err; 1936b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen} 1937b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko LavinenEXPORT_SYMBOL(mmc_card_sleep); 1938b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1939b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinenint mmc_card_can_sleep(struct mmc_host *host) 1940b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen{ 1941b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen struct mmc_card *card = host->card; 1942b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1943b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen if (card && mmc_card_mmc(card) && card->ext_csd.rev >= 3) 1944b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen return 1; 1945b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen return 0; 1946b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen} 1947b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko LavinenEXPORT_SYMBOL(mmc_card_can_sleep); 1948b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 19491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_PM 19501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 19521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_suspend_host - suspend a host 19531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host 19541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19551a13f8fa76c880be41d6b1e6a2b44404bcbfdf9eMatt Flemingint mmc_suspend_host(struct mmc_host *host) 19561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 195795cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre int err = 0; 195895cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre 19598ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->caps & MMC_CAP_DISABLE) 19608ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter cancel_delayed_work(&host->disable); 19617de427d088a967d2173739e21e744921d5496a8bJorg Schummer cancel_delayed_work(&host->detect); 1962b5af25bee2de2f6cd1ac74ba737cbc4f3d303e5dPierre Ossman mmc_flush_scheduled_work(); 1963b5af25bee2de2f6cd1ac74ba737cbc4f3d303e5dPierre Ossman 19647ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_get(host); 19657ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (host->bus_ops && !host->bus_dead) { 19666abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (host->bus_ops->suspend) 196795cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre err = host->bus_ops->suspend(host); 19681c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen if (err == -ENOSYS || !host->bus_ops->resume) { 19691c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen /* 19701c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen * We simply "remove" the card in this case. 19711c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen * It will be redetected on resume. 19721c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen */ 19731c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen if (host->bus_ops->remove) 19741c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen host->bus_ops->remove(host); 19751c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen mmc_claim_host(host); 19761c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen mmc_detach_bus(host); 19771c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen mmc_release_host(host); 19781c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen host->pm_flags = 0; 19791c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen err = 0; 19801c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen } 1981b5af25bee2de2f6cd1ac74ba737cbc4f3d303e5dPierre Ossman } 19827ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 19837ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1984a5e9425d2010978c5f85986cc70a9fa0c0d5b912Ohad Ben-Cohen if (!err && !mmc_card_keep_power(host)) 198595cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre mmc_power_off(host); 19861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 198795cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre return err; 19881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_suspend_host); 19911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 19931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_resume_host - resume a previously suspended host 19941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host 19951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint mmc_resume_host(struct mmc_host *host) 19971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 199895cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre int err = 0; 199995cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre 20006abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_bus_get(host); 20016abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (host->bus_ops && !host->bus_dead) { 2002a5e9425d2010978c5f85986cc70a9fa0c0d5b912Ohad Ben-Cohen if (!mmc_card_keep_power(host)) { 2003da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre mmc_power_up(host); 2004da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre mmc_select_voltage(host, host->ocr); 2005e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen /* 2006e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen * Tell runtime PM core we just powered up the card, 2007e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen * since it still believes the card is powered off. 2008e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen * Note that currently runtime PM is only enabled 2009e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen * for SDIO cards that are MMC_CAP_POWER_OFF_CARD 2010e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen */ 2011e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen if (mmc_card_sdio(host->card) && 2012e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen (host->caps & MMC_CAP_POWER_OFF_CARD)) { 2013e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen pm_runtime_disable(&host->card->dev); 2014e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen pm_runtime_set_active(&host->card->dev); 2015e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen pm_runtime_enable(&host->card->dev); 2016e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen } 2017da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre } 20186abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman BUG_ON(!host->bus_ops->resume); 201995cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre err = host->bus_ops->resume(host); 202095cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre if (err) { 202195cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre printk(KERN_WARNING "%s: error %d during resume " 202295cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre "(card was removed?)\n", 202395cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre mmc_hostname(host), err); 202495cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre err = 0; 202595cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre } 20266abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman } 2027a8e6df7343cf67c9104955da0de70075a6ee1dfdEliad Peller host->pm_flags &= ~MMC_PM_KEEP_POWER; 20286abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_bus_put(host); 20296abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 203095cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre return err; 20311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_resume_host); 20331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20344c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky/* Do the card removal on suspend if card is assumed removeable 20354c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky * Do that in pm notifier while userspace isn't yet frozen, so we will be able 20364c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky to sync the card. 20374c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky*/ 20384c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitskyint mmc_pm_notify(struct notifier_block *notify_block, 20394c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky unsigned long mode, void *unused) 20404c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky{ 20414c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky struct mmc_host *host = container_of( 20424c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky notify_block, struct mmc_host, pm_notify); 20434c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky unsigned long flags; 20444c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 20454c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 20464c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky switch (mode) { 20474c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky case PM_HIBERNATION_PREPARE: 20484c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky case PM_SUSPEND_PREPARE: 20494c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 20504c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky spin_lock_irqsave(&host->lock, flags); 20514c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky host->rescan_disable = 1; 20524c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky spin_unlock_irqrestore(&host->lock, flags); 20534c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky cancel_delayed_work_sync(&host->detect); 20544c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 20554c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky if (!host->bus_ops || host->bus_ops->suspend) 20564c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky break; 20574c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 20584c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky mmc_claim_host(host); 20594c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 20604c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky if (host->bus_ops->remove) 20614c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky host->bus_ops->remove(host); 20624c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 20634c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky mmc_detach_bus(host); 20644c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky mmc_release_host(host); 20654c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky host->pm_flags = 0; 20664c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky break; 20674c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 20684c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky case PM_POST_SUSPEND: 20694c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky case PM_POST_HIBERNATION: 2070274476f8fe0b6ac9bac542cc39de12c3dd0f43f6Takashi Iwai case PM_POST_RESTORE: 20714c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 20724c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky spin_lock_irqsave(&host->lock, flags); 20734c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky host->rescan_disable = 0; 20744c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky spin_unlock_irqrestore(&host->lock, flags); 20754c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky mmc_detect_change(host, 0); 20764c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 20774c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky } 20784c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 20794c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky return 0; 20804c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky} 20811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 20821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2083ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic int __init mmc_init(void) 2084ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 2085ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman int ret; 2086ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 20870d9ee5b2e9aac981fa063339daf04320eac610d1Tejun Heo workqueue = alloc_ordered_workqueue("kmmcd", 0); 2088ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman if (!workqueue) 2089ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman return -ENOMEM; 2090ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 2091ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman ret = mmc_register_bus(); 2092e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman if (ret) 2093e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman goto destroy_workqueue; 2094e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 2095e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman ret = mmc_register_host_class(); 2096e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman if (ret) 2097e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman goto unregister_bus; 2098e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 2099e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman ret = sdio_register_bus(); 2100e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman if (ret) 2101e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman goto unregister_host_class; 2102e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 2103e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman return 0; 2104e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 2105e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossmanunregister_host_class: 2106e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman mmc_unregister_host_class(); 2107e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossmanunregister_bus: 2108e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman mmc_unregister_bus(); 2109e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossmandestroy_workqueue: 2110e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman destroy_workqueue(workqueue); 2111e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 2112ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman return ret; 2113ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 2114ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 2115ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic void __exit mmc_exit(void) 2116ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 2117e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman sdio_unregister_bus(); 2118ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman mmc_unregister_host_class(); 2119ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman mmc_unregister_bus(); 2120ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman destroy_workqueue(workqueue); 2121ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 2122ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 212326074962e8f547b96614dbe248748ba2a1996ca3Nicolas Pitresubsys_initcall(mmc_init); 2124ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanmodule_exit(mmc_exit); 2125ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 21261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 2127