core.c revision 4cf8c6dd2e261da94b87c4deadcc136ab022b6ac
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> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mmc/card.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mmc/host.h> 29da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include <linux/mmc/mmc.h> 30da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include <linux/mmc/sd.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32aaac1b470bd0dccb30912356617069dc6199cc80Pierre Ossman#include "core.h" 33ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman#include "bus.h" 34ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman#include "host.h" 35e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman#include "sdio_bus.h" 36da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman 37da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include "mmc_ops.h" 38da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include "sd_ops.h" 395c4e6f1301649d5b29dd0f70e6da83e728ab5ca5Pierre Ossman#include "sdio_ops.h" 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic struct workqueue_struct *workqueue; 42ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 43ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman/* 44af51715079e7fb6b290e1881d63d815dc4de5011David Brownell * Enabling software CRCs on the data blocks can be a significant (30%) 45af51715079e7fb6b290e1881d63d815dc4de5011David Brownell * performance cost, and for other reasons may not always be desired. 46af51715079e7fb6b290e1881d63d815dc4de5011David Brownell * So we allow it it to be disabled. 47af51715079e7fb6b290e1881d63d815dc4de5011David Brownell */ 48af51715079e7fb6b290e1881d63d815dc4de5011David Brownellint use_spi_crc = 1; 49af51715079e7fb6b290e1881d63d815dc4de5011David Brownellmodule_param(use_spi_crc, bool, 0); 50af51715079e7fb6b290e1881d63d815dc4de5011David Brownell 51af51715079e7fb6b290e1881d63d815dc4de5011David Brownell/* 52bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings * We normally treat cards as removed during suspend if they are not 53bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings * known to be on a non-removable bus, to avoid the risk of writing 54bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings * back data to a different card after resume. Allow this to be 55bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings * overridden if necessary. 56bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings */ 57bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings#ifdef CONFIG_MMC_UNSAFE_RESUME 58bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchingsint mmc_assume_removable; 59bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings#else 60bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchingsint mmc_assume_removable = 1; 61bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings#endif 6271d7d3d190fe77588269a8febf93cd739bd91eb3Matt FlemingEXPORT_SYMBOL(mmc_assume_removable); 63bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchingsmodule_param_named(removable, mmc_assume_removable, bool, 0644); 64bd68e0838fe85794b06892054772fa013a8d1986Ben HutchingsMODULE_PARM_DESC( 65bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings removable, 66bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings "MMC/SD cards are removable and may be removed during suspend"); 67bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings 68bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings/* 69ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman * Internal function. Schedule delayed work in the MMC work queue. 70ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman */ 71ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic int mmc_schedule_delayed_work(struct delayed_work *work, 72ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman unsigned long delay) 73ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 74ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman return queue_delayed_work(workqueue, work, delay); 75ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 76ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 77ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman/* 78ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman * Internal function. Flush all scheduled work from the MMC work queue. 79ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman */ 80ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic void mmc_flush_scheduled_work(void) 81ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 82ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman flush_workqueue(workqueue); 83ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 84ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 86fe10c6abea8bc83291a13e0580b3e4c355710b09Russell King * mmc_request_done - finish processing an MMC request 87fe10c6abea8bc83291a13e0580b3e4c355710b09Russell King * @host: MMC host which completed request 88fe10c6abea8bc83291a13e0580b3e4c355710b09Russell King * @mrq: MMC request which request 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MMC drivers should call this function when they have completed 91fe10c6abea8bc83291a13e0580b3e4c355710b09Russell King * their processing of a request. 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_command *cmd = mrq->cmd; 96920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King int err = cmd->error; 97920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King 98af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (err && cmd->retries && mmc_host_is_spi(host)) { 99af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) 100af51715079e7fb6b290e1881d63d815dc4de5011David Brownell cmd->retries = 0; 101af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } 102af51715079e7fb6b290e1881d63d815dc4de5011David Brownell 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err && cmd->retries) { 104e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: req failed (CMD%u): %d, retrying...\n", 105e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), cmd->opcode, err); 106e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->retries--; 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->error = 0; 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ops->request(host, mrq); 110e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } else { 111af8350c756cb48a738474738f7bf8c0e572fa057Pierre Ossman led_trigger_event(host->led, LED_OFF); 112af8350c756cb48a738474738f7bf8c0e572fa057Pierre Ossman 113e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", 114e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), cmd->opcode, err, 115e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman cmd->resp[0], cmd->resp[1], 116e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman cmd->resp[2], cmd->resp[3]); 117e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 118e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->data) { 119e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: %d bytes transferred: %d\n", 120e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), 121e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->data->bytes_xfered, mrq->data->error); 122e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } 123e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 124e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->stop) { 125e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n", 126e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), mrq->stop->opcode, 127e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->stop->error, 128e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->stop->resp[0], mrq->stop->resp[1], 129e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->stop->resp[2], mrq->stop->resp[3]); 130e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } 131e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 132e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->done) 133e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->done(mrq); 13404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 13504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij mmc_host_clk_gate(host); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_request_done); 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 141393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunkstatic void 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmmc_start_request(struct mmc_host *host, struct mmc_request *mrq) 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 144976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman#ifdef CONFIG_MMC_DEBUG 145976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman unsigned int i, sz; 146a84756c5735f28bf000617f18734a9e94426386aPierre Ossman struct scatterlist *sg; 147976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman#endif 148976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman 149920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King pr_debug("%s: starting CMD%u arg %08x flags %08x\n", 150920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_hostname(host), mrq->cmd->opcode, 151920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mrq->cmd->arg, mrq->cmd->flags); 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 153e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->data) { 154e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: blksz %d blocks %d flags %08x " 155e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman "tsac %d ms nsac %d\n", 156e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), mrq->data->blksz, 157e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->data->blocks, mrq->data->flags, 158ce252edd869ba1fee6a9a6f83e20f349d4c4d669Pierre Ossman mrq->data->timeout_ns / 1000000, 159e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->data->timeout_clks); 160e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } 161e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 162e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->stop) { 163e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: CMD%u arg %08x flags %08x\n", 164e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), mrq->stop->opcode, 165e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->stop->arg, mrq->stop->flags); 166e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } 167e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 168f22ee4edf63e7480511112d9965c71e07be3f8b7Pierre Ossman WARN_ON(!host->claimed); 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->cmd->error = 0; 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->cmd->mrq = mrq; 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mrq->data) { 173fe4a3c7a20f14d86022a8132adbf6ddb98e7197cPierre Ossman BUG_ON(mrq->data->blksz > host->max_blk_size); 17455db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman BUG_ON(mrq->data->blocks > host->max_blk_count); 17555db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman BUG_ON(mrq->data->blocks * mrq->data->blksz > 17655db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman host->max_req_size); 177fe4a3c7a20f14d86022a8132adbf6ddb98e7197cPierre Ossman 178976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman#ifdef CONFIG_MMC_DEBUG 179976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman sz = 0; 180a84756c5735f28bf000617f18734a9e94426386aPierre Ossman for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) 181a84756c5735f28bf000617f18734a9e94426386aPierre Ossman sz += sg->length; 182976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman BUG_ON(sz != mrq->data->blocks * mrq->data->blksz); 183976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman#endif 184976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->cmd->data = mrq->data; 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->data->error = 0; 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->data->mrq = mrq; 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mrq->stop) { 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->data->stop = mrq->stop; 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->stop->error = 0; 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->stop->mrq = mrq; 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij mmc_host_clk_ungate(host); 19566c036e0142fed2484d58a2d3c7a4d21ba32b6a6Pierre Tardy led_trigger_event(host->led, LED_FULL); 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ops->request(host, mrq); 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_wait_done(struct mmc_request *mrq) 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds complete(mrq->done_data); 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20467a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman/** 20567a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * mmc_wait_for_req - start a request and wait for completion 20667a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * @host: MMC host to start command 20767a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * @mrq: MMC request to start 20867a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * 20967a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * Start a new MMC custom command request for a host, and wait 21067a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * for the command to complete. Does not attempt to parse the 21167a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * response. 21267a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman */ 21367a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossmanvoid mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2150afffc723c8041a005134099847ac2a2fd0316a0Ingo Molnar DECLARE_COMPLETION_ONSTACK(complete); 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->done_data = &complete; 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->done = mmc_wait_done; 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_start_request(host, mrq); 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_for_completion(&complete); 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_wait_for_req); 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_wait_for_cmd - start a command and wait for completion 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: MMC host to start command 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @cmd: MMC command to start 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @retries: maximum number of retries 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Start a new MMC command for a host, and wait for the command 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to complete. Return any error that occurred while the command 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * was executing. Do not attempt to parse the response. 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 23924f5b53ba076e983bc64fa48534ca795d7813d51Chris Ball struct mmc_request mrq = {0}; 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 241d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(cmd->resp, 0, sizeof(cmd->resp)); 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->retries = retries; 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq.cmd = cmd; 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->data = NULL; 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_wait_for_req(host, &mrq); 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cmd->error; 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_wait_for_cmd); 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 256335eadf2ef6a1122a720aea98e758e5d431da87dPierre Ossman/** 257d773d7255199a6c8934e197756f54a1115dd127bRussell King * mmc_set_data_timeout - set the timeout for a data command 258d773d7255199a6c8934e197756f54a1115dd127bRussell King * @data: data phase for command 259d773d7255199a6c8934e197756f54a1115dd127bRussell King * @card: the MMC card associated with the data transfer 26067a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * 26167a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * Computes the data timeout parameters according to the 26267a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * correct algorithm given the card type. 263d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 264b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossmanvoid mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) 265d773d7255199a6c8934e197756f54a1115dd127bRussell King{ 266d773d7255199a6c8934e197756f54a1115dd127bRussell King unsigned int mult; 267d773d7255199a6c8934e197756f54a1115dd127bRussell King 268d773d7255199a6c8934e197756f54a1115dd127bRussell King /* 269e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman * SDIO cards only define an upper 1 s limit on access. 270e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman */ 271e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman if (mmc_card_sdio(card)) { 272e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman data->timeout_ns = 1000000000; 273e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman data->timeout_clks = 0; 274e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman return; 275e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman } 276e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman 277e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman /* 278d773d7255199a6c8934e197756f54a1115dd127bRussell King * SD cards use a 100 multiplier rather than 10 279d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 280d773d7255199a6c8934e197756f54a1115dd127bRussell King mult = mmc_card_sd(card) ? 100 : 10; 281d773d7255199a6c8934e197756f54a1115dd127bRussell King 282d773d7255199a6c8934e197756f54a1115dd127bRussell King /* 283d773d7255199a6c8934e197756f54a1115dd127bRussell King * Scale up the multiplier (and therefore the timeout) by 284d773d7255199a6c8934e197756f54a1115dd127bRussell King * the r2w factor for writes. 285d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 286b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossman if (data->flags & MMC_DATA_WRITE) 287d773d7255199a6c8934e197756f54a1115dd127bRussell King mult <<= card->csd.r2w_factor; 288d773d7255199a6c8934e197756f54a1115dd127bRussell King 289d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_ns = card->csd.tacc_ns * mult; 290d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_clks = card->csd.tacc_clks * mult; 291d773d7255199a6c8934e197756f54a1115dd127bRussell King 292d773d7255199a6c8934e197756f54a1115dd127bRussell King /* 293d773d7255199a6c8934e197756f54a1115dd127bRussell King * SD cards also have an upper limit on the timeout. 294d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 295d773d7255199a6c8934e197756f54a1115dd127bRussell King if (mmc_card_sd(card)) { 296d773d7255199a6c8934e197756f54a1115dd127bRussell King unsigned int timeout_us, limit_us; 297d773d7255199a6c8934e197756f54a1115dd127bRussell King 298d773d7255199a6c8934e197756f54a1115dd127bRussell King timeout_us = data->timeout_ns / 1000; 299e9b86841b372de01ae865080118e29159d8b7c39Linus Walleij if (mmc_host_clk_rate(card->host)) 300e9b86841b372de01ae865080118e29159d8b7c39Linus Walleij timeout_us += data->timeout_clks * 1000 / 301e9b86841b372de01ae865080118e29159d8b7c39Linus Walleij (mmc_host_clk_rate(card->host) / 1000); 302d773d7255199a6c8934e197756f54a1115dd127bRussell King 303b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossman if (data->flags & MMC_DATA_WRITE) 304493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman /* 305493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman * The limit is really 250 ms, but that is 306493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman * insufficient for some crappy cards. 307493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman */ 308493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman limit_us = 300000; 309d773d7255199a6c8934e197756f54a1115dd127bRussell King else 310d773d7255199a6c8934e197756f54a1115dd127bRussell King limit_us = 100000; 311d773d7255199a6c8934e197756f54a1115dd127bRussell King 312fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale /* 313fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale * SDHC cards always use these fixed values. 314fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale */ 315fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale if (timeout_us > limit_us || mmc_card_blockaddr(card)) { 316d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_ns = limit_us * 1000; 317d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_clks = 0; 318d773d7255199a6c8934e197756f54a1115dd127bRussell King } 319d773d7255199a6c8934e197756f54a1115dd127bRussell King } 320c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees /* 321c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * Some cards need very high timeouts if driven in SPI mode. 322c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * The worst observed timeout was 900ms after writing a 323c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * continuous stream of data until the internal logic 324c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * overflowed. 325c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees */ 326c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (mmc_host_is_spi(card->host)) { 327c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (data->flags & MMC_DATA_WRITE) { 328c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (data->timeout_ns < 1000000000) 329c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees data->timeout_ns = 1000000000; /* 1s */ 330c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees } else { 331c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (data->timeout_ns < 100000000) 332c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees data->timeout_ns = 100000000; /* 100ms */ 333c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees } 334c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees } 335d773d7255199a6c8934e197756f54a1115dd127bRussell King} 336d773d7255199a6c8934e197756f54a1115dd127bRussell KingEXPORT_SYMBOL(mmc_set_data_timeout); 337d773d7255199a6c8934e197756f54a1115dd127bRussell King 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 339ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * mmc_align_data_size - pads a transfer size to a more optimal value 340ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * @card: the MMC card associated with the data transfer 341ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * @sz: original transfer size 342ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * 343ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * Pads the original data size with a number of extra bytes in 344ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * order to avoid controller bugs and/or performance hits 345ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * (e.g. some controllers revert to PIO for certain sizes). 346ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * 347ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * Returns the improved size, which might be unmodified. 348ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * 349ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * Note that this function is only relevant when issuing a 350ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * single scatter gather entry. 351ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman */ 352ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossmanunsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) 353ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman{ 354ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman /* 355ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * FIXME: We don't have a system for the controller to tell 356ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * the core about its problems yet, so for now we just 32-bit 357ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * align the size. 358ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman */ 359ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman sz = ((sz + 3) / 4) * 4; 360ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman 361ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman return sz; 362ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman} 363ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre OssmanEXPORT_SYMBOL(mmc_align_data_size); 364ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman 365ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman/** 3668ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * mmc_host_enable - enable a host. 3678ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * @host: mmc host to enable 3688ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * 3698ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * Hosts that support power saving can use the 'enable' and 'disable' 3708ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * methods to exit and enter power saving states. For more information 3718ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * see comments for struct mmc_host_ops. 3728ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter */ 3738ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterint mmc_host_enable(struct mmc_host *host) 3748ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 3758ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!(host->caps & MMC_CAP_DISABLE)) 3768ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 3778ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3788ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->en_dis_recurs) 3798ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 3808ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3818ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->nesting_cnt++) 3828ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 3838ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3848ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter cancel_delayed_work_sync(&host->disable); 3858ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3868ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->enabled) 3878ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 3888ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3898ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->ops->enable) { 3908ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int err; 3918ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3928ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 1; 3938ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter err = host->ops->enable(host); 3948ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 0; 3958ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3968ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (err) { 3978ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter pr_debug("%s: enable error %d\n", 3988ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_hostname(host), err); 3998ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return err; 4008ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4018ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4028ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->enabled = 1; 4038ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4048ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 4058ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian HunterEXPORT_SYMBOL(mmc_host_enable); 4068ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4078ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterstatic int mmc_host_do_disable(struct mmc_host *host, int lazy) 4088ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 4098ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->ops->disable) { 4108ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int err; 4118ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4128ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 1; 4138ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter err = host->ops->disable(host, lazy); 4148ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 0; 4158ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4168ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (err < 0) { 4178ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter pr_debug("%s: disable error %d\n", 4188ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_hostname(host), err); 4198ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return err; 4208ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4218ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (err > 0) { 4228ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter unsigned long delay = msecs_to_jiffies(err); 4238ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4248ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_schedule_delayed_work(&host->disable, delay); 4258ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4268ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4278ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->enabled = 0; 4288ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4298ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 4308ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4318ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter/** 4328ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * mmc_host_disable - disable a host. 4338ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * @host: mmc host to disable 4348ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * 4358ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * Hosts that support power saving can use the 'enable' and 'disable' 4368ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * methods to exit and enter power saving states. For more information 4378ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * see comments for struct mmc_host_ops. 4388ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter */ 4398ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterint mmc_host_disable(struct mmc_host *host) 4408ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 4418ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int err; 4428ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4438ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!(host->caps & MMC_CAP_DISABLE)) 4448ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4458ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4468ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->en_dis_recurs) 4478ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4488ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4498ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (--host->nesting_cnt) 4508ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4518ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4528ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!host->enabled) 4538ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4548ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4558ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter err = mmc_host_do_disable(host, 0); 4568ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return err; 4578ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 4588ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian HunterEXPORT_SYMBOL(mmc_host_disable); 4598ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4608ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter/** 4612342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * __mmc_claim_host - exclusively claim a host 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host to claim 4632342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * @abort: whether or not the operation should be aborted 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 4652342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * Claim a host for a set of operations. If @abort is non null and 4662342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * dereference a non-zero value then this will return prematurely with 4672342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * that non-zero value without acquiring the lock. Returns zero 4682342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * with the lock held otherwise. 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4702342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitreint __mmc_claim_host(struct mmc_host *host, atomic_t *abort) 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 4742342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre int stop; 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 476cf795bfb3ad4e2f8f6bb346aa8edb8272d4c70a2Pierre Ossman might_sleep(); 477cf795bfb3ad4e2f8f6bb346aa8edb8272d4c70a2Pierre Ossman 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&host->wq, &wait); 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&host->lock, flags); 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (1) { 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 4822342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre stop = abort ? atomic_read(abort) : 0; 483319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (stop || !host->claimed || host->claimer == current) 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&host->lock, flags); 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&host->lock, flags); 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_RUNNING); 490319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (!stop) { 4912342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre host->claimed = 1; 492319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimer = current; 493319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claim_cnt += 1; 494319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter } else 4952342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre wake_up(&host->wq); 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&host->lock, flags); 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&host->wq, &wait); 4988ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!stop) 4998ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_host_enable(host); 5002342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre return stop; 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5032342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas PitreEXPORT_SYMBOL(__mmc_claim_host); 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 505319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter/** 506319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * mmc_try_claim_host - try exclusively to claim a host 507319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * @host: mmc host to claim 508319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * 509319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * Returns %1 if the host is claimed, %0 otherwise. 510319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter */ 511319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunterint mmc_try_claim_host(struct mmc_host *host) 5128ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 5138ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int claimed_host = 0; 5148ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter unsigned long flags; 5158ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5168ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter spin_lock_irqsave(&host->lock, flags); 517319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (!host->claimed || host->claimer == current) { 5188ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->claimed = 1; 519319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimer = current; 520319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claim_cnt += 1; 5218ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter claimed_host = 1; 5228ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 5238ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter spin_unlock_irqrestore(&host->lock, flags); 5248ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return claimed_host; 5258ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 526319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian HunterEXPORT_SYMBOL(mmc_try_claim_host); 5278ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 528ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson/** 529ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson * mmc_do_release_host - release a claimed host 530ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson * @host: mmc host to release 531ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson * 532ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson * If you successfully claimed a host, this function will 533ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson * release it again. 534ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hansson */ 535ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf Hanssonvoid mmc_do_release_host(struct mmc_host *host) 5368ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 5378ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter unsigned long flags; 5388ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5398ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter spin_lock_irqsave(&host->lock, flags); 540319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (--host->claim_cnt) { 541319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter /* Release for nested claim */ 542319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter spin_unlock_irqrestore(&host->lock, flags); 543319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter } else { 544319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimed = 0; 545319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimer = NULL; 546319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter spin_unlock_irqrestore(&host->lock, flags); 547319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter wake_up(&host->wq); 548319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter } 5498ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 550ab1efd271704416c9e6e9cb4e5f58e7e4c4260e6Ulf HanssonEXPORT_SYMBOL(mmc_do_release_host); 5518ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5528ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Huntervoid mmc_host_deeper_disable(struct work_struct *work) 5538ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 5548ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter struct mmc_host *host = 5558ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter container_of(work, struct mmc_host, disable.work); 5568ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5578ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter /* If the host is claimed then we do not want to disable it anymore */ 5588ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!mmc_try_claim_host(host)) 5598ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return; 5608ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_host_do_disable(host, 1); 5618ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_do_release_host(host); 5628ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 5638ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5648ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter/** 5658ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * mmc_host_lazy_disable - lazily disable a host. 5668ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * @host: mmc host to disable 5678ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * 5688ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * Hosts that support power saving can use the 'enable' and 'disable' 5698ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * methods to exit and enter power saving states. For more information 5708ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * see comments for struct mmc_host_ops. 5718ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter */ 5728ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterint mmc_host_lazy_disable(struct mmc_host *host) 5738ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 5748ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!(host->caps & MMC_CAP_DISABLE)) 5758ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5768ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5778ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->en_dis_recurs) 5788ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5798ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5808ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (--host->nesting_cnt) 5818ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5828ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5838ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!host->enabled) 5848ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5858ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5868ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->disable_delay) { 5878ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_schedule_delayed_work(&host->disable, 5888ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter msecs_to_jiffies(host->disable_delay)); 5898ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5908ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } else 5918ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return mmc_host_do_disable(host, 1); 5928ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 5938ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian HunterEXPORT_SYMBOL(mmc_host_lazy_disable); 5948ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_release_host - release a host 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host to release 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Release a MMC host, allowing others to claim the host 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for their operations. 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid mmc_release_host(struct mmc_host *host) 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 604d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6068ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_host_lazy_disable(host); 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6088ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_do_release_host(host); 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_release_host); 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6137ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 6147ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Internal function that does the actual ios call to the host driver, 6157ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * optionally printing some debug output. 6167ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 617920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell Kingstatic inline void mmc_set_ios(struct mmc_host *host) 618920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King{ 619920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King struct mmc_ios *ios = &host->ios; 620920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King 621cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " 622cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman "width %u timing %u\n", 623920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_hostname(host), ios->clock, ios->bus_mode, 624920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King ios->power_mode, ios->chip_select, ios->vdd, 625cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman ios->bus_width, ios->timing); 626fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale 62704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij if (ios->clock > 0) 62804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij mmc_set_ungated(host); 629920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King host->ops->set_ios(host, ios); 630920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King} 631920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King 6327ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 6337ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Control chip select pin on a host. 6347ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 635da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossmanvoid mmc_set_chip_select(struct mmc_host *host, int mode) 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 637da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman host->ios.chip_select = mode; 638da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman mmc_set_ios(host); 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 6427ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Sets the host clock to the highest possible frequency that 6437ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * is below "hz". 6447ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 6457ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_set_clock(struct mmc_host *host, unsigned int hz) 6467ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 6477ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman WARN_ON(hz < host->f_min); 6487ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 6497ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (hz > host->f_max) 6507ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman hz = host->f_max; 6517ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 6527ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.clock = hz; 6537ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 6547ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 6557ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 65604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij#ifdef CONFIG_MMC_CLKGATE 65704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij/* 65804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * This gates the clock by setting it to 0 Hz. 65904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij */ 66004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleijvoid mmc_gate_clock(struct mmc_host *host) 66104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij{ 66204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij unsigned long flags; 66304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 66404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij spin_lock_irqsave(&host->clk_lock, flags); 66504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij host->clk_old = host->ios.clock; 66604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij host->ios.clock = 0; 66704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij host->clk_gated = true; 66804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij spin_unlock_irqrestore(&host->clk_lock, flags); 66904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij mmc_set_ios(host); 67004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij} 67104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 67204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij/* 67304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * This restores the clock from gating by using the cached 67404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * clock value. 67504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij */ 67604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleijvoid mmc_ungate_clock(struct mmc_host *host) 67704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij{ 67804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij /* 67904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * We should previously have gated the clock, so the clock shall 68004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * be 0 here! The clock may however be 0 during initialization, 68104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * when some request operations are performed before setting 68204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * the frequency. When ungate is requested in that situation 68304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * we just ignore the call. 68404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij */ 68504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij if (host->clk_old) { 68604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij BUG_ON(host->ios.clock); 68704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij /* This call will also set host->clk_gated to false */ 68804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij mmc_set_clock(host, host->clk_old); 68904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij } 69004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij} 69104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 69204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleijvoid mmc_set_ungated(struct mmc_host *host) 69304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij{ 69404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij unsigned long flags; 69504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 69604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij /* 69704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * We've been given a new frequency while the clock is gated, 69804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * so make sure we regard this as ungating it. 69904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij */ 70004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij spin_lock_irqsave(&host->clk_lock, flags); 70104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij host->clk_gated = false; 70204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij spin_unlock_irqrestore(&host->clk_lock, flags); 70304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij} 70404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 70504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij#else 70604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleijvoid mmc_set_ungated(struct mmc_host *host) 70704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij{ 70804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij} 70904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij#endif 71004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 7117ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 7127ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Change the bus mode (open drain/push-pull) of a host. 7137ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 7147ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) 7157ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 7167ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.bus_mode = mode; 7177ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 7187ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 7197ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 7207ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 7210f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter * Change data bus width of a host. 7220f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter */ 7230f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Huntervoid mmc_set_bus_width(struct mmc_host *host, unsigned int width) 7240f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter{ 7254c4cb171054230c2e58ed6574d7faa1871c75bbePhilip Rakity host->ios.bus_width = width; 7264c4cb171054230c2e58ed6574d7faa1871c75bbePhilip Rakity mmc_set_ios(host); 7270f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter} 7280f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter 72986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov/** 73086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number 73186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @vdd: voltage (mV) 73286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @low_bits: prefer low bits in boundary cases 73386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 73486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * This function returns the OCR bit number according to the provided @vdd 73586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * value. If conversion is not possible a negative errno value returned. 73686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 73786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * Depending on the @low_bits flag the function prefers low or high OCR bits 73886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * on boundary voltages. For example, 73986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); 74086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); 74186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 74286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). 74386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov */ 74486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsovstatic int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) 74586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov{ 74686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov const int max_bit = ilog2(MMC_VDD_35_36); 74786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov int bit; 74886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 74986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd < 1650 || vdd > 3600) 75086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return -EINVAL; 75186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 75286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd >= 1650 && vdd <= 1950) 75386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return ilog2(MMC_VDD_165_195); 75486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 75586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (low_bits) 75686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov vdd -= 1; 75786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 75886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Base 2000 mV, step 100 mV, bit's base 8. */ 75986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov bit = (vdd - 2000) / 100 + 8; 76086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (bit > max_bit) 76186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return max_bit; 76286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return bit; 76386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov} 76486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 76586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov/** 76686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask 76786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @vdd_min: minimum voltage value (mV) 76886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @vdd_max: maximum voltage value (mV) 76986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 77086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * This function returns the OCR mask bits according to the provided @vdd_min 77186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * and @vdd_max values. If conversion is not possible the function returns 0. 77286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 77386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * Notes wrt boundary cases: 77486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * This function sets the OCR bits for all boundary voltages, for example 77586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | 77686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * MMC_VDD_34_35 mask. 77786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov */ 77886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsovu32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) 77986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov{ 78086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov u32 mask = 0; 78186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 78286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd_max < vdd_min) 78386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return 0; 78486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 78586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Prefer high bits for the boundary vdd_max values. */ 78686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); 78786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd_max < 0) 78886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return 0; 78986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 79086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Prefer low bits for the boundary vdd_min values. */ 79186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); 79286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd_min < 0) 79386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return 0; 79486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 79586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Fill the mask, from max bit to min bit. */ 79686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov while (vdd_max >= vdd_min) 79786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov mask |= 1 << vdd_max--; 79886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 79986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return mask; 80086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov} 80186e8286a0e48663e1e86a5884b30a6d05de2993aAnton VorontsovEXPORT_SYMBOL(mmc_vddrange_to_ocrmask); 80286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 8035c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell#ifdef CONFIG_REGULATOR 8045c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8055c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell/** 8065c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * mmc_regulator_get_ocrmask - return mask of supported voltages 8075c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * @supply: regulator to use 8085c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * 8095c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * This returns either a negative errno, or a mask of voltages that 8105c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * can be provided to MMC/SD/SDIO devices using the specified voltage 8115c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * regulator. This would normally be called before registering the 8125c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * MMC host adapter. 8135c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 8145c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownellint mmc_regulator_get_ocrmask(struct regulator *supply) 8155c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell{ 8165c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int result = 0; 8175c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int count; 8185c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int i; 8195c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8205c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell count = regulator_count_voltages(supply); 8215c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (count < 0) 8225c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell return count; 8235c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8245c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell for (i = 0; i < count; i++) { 8255c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int vdd_uV; 8265c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int vdd_mV; 8275c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8285c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell vdd_uV = regulator_list_voltage(supply, i); 8295c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (vdd_uV <= 0) 8305c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell continue; 8315c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8325c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell vdd_mV = vdd_uV / 1000; 8335c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); 8345c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } 8355c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8365c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell return result; 8375c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell} 8385c13941acc513669c7d07b28789c3f9ba66ddddfDavid BrownellEXPORT_SYMBOL(mmc_regulator_get_ocrmask); 8395c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8405c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell/** 8415c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * mmc_regulator_set_ocr - set regulator to match host->ios voltage 84299fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij * @mmc: the host to regulate 8435c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * @supply: regulator to use 84499fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij * @vdd_bit: zero for power off, else a bit number (host->ios.vdd) 8455c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * 8465c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * Returns zero on success, else negative errno. 8475c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * 8485c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * MMC host drivers may use this to enable or disable a regulator using 8495c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * a particular supply voltage. This would normally be called from the 8505c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * set_ios() method. 8515c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 85299fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleijint mmc_regulator_set_ocr(struct mmc_host *mmc, 85399fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij struct regulator *supply, 85499fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij unsigned short vdd_bit) 8555c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell{ 8565c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int result = 0; 8575c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int min_uV, max_uV; 8585c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8595c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (vdd_bit) { 8605c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int tmp; 8615c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int voltage; 8625c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8635c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell /* REVISIT mmc_vddrange_to_ocrmask() may have set some 8645c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * bits this regulator doesn't quite support ... don't 8655c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * be too picky, most cards and regulators are OK with 8665c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * a 0.1V range goof (it's a small error percentage). 8675c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 8685c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell tmp = vdd_bit - ilog2(MMC_VDD_165_195); 8695c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (tmp == 0) { 8705c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell min_uV = 1650 * 1000; 8715c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell max_uV = 1950 * 1000; 8725c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } else { 8735c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell min_uV = 1900 * 1000 + tmp * 100 * 1000; 8745c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell max_uV = min_uV + 100 * 1000; 8755c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } 8765c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8775c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell /* avoid needless changes to this voltage; the regulator 8785c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * might not allow this operation 8795c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 8805c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell voltage = regulator_get_voltage(supply); 8815c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (voltage < 0) 8825c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = voltage; 8835c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell else if (voltage < min_uV || voltage > max_uV) 8845c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = regulator_set_voltage(supply, min_uV, max_uV); 8855c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell else 8865c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = 0; 8875c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 88899fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij if (result == 0 && !mmc->regulator_enabled) { 8895c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = regulator_enable(supply); 89099fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij if (!result) 89199fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij mmc->regulator_enabled = true; 89299fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij } 89399fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij } else if (mmc->regulator_enabled) { 8945c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = regulator_disable(supply); 89599fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij if (result == 0) 89699fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij mmc->regulator_enabled = false; 8975c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } 8985c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 89999fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij if (result) 90099fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij dev_err(mmc_dev(mmc), 90199fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij "could not set regulator OCR (%d)\n", result); 9025c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell return result; 9035c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell} 9045c13941acc513669c7d07b28789c3f9ba66ddddfDavid BrownellEXPORT_SYMBOL(mmc_regulator_set_ocr); 9055c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 90699fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij#endif /* CONFIG_REGULATOR */ 9075c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 9087ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Mask off any voltages we don't support and select 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the lowest voltage 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9127ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanu32 mmc_select_voltage(struct mmc_host *host, u32 ocr) 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int bit; 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ocr &= host->ocr_avail; 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bit = ffs(ocr); 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bit) { 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bit -= 1; 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 92263ef731aa6a81e286de78dcc92241d123424ed39Timo Teras ocr &= 3 << bit; 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.vdd = bit; 925920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 927f6e10b865c3ea56bdaa8c6ecfee313b997900dbbDavid Brownell pr_warning("%s: host doesn't support card's voltages\n", 928f6e10b865c3ea56bdaa8c6ecfee313b997900dbbDavid Brownell mmc_hostname(host)); 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ocr = 0; 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ocr; 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 935261bbd463a091b939770255d559bbc89b1bad568Philip Rakityint mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, bool cmd11) 936f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath{ 937f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath struct mmc_command cmd = {0}; 938f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath int err = 0; 939f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 940f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath BUG_ON(!host); 941f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 942f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath /* 943f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * Send CMD11 only if the request is to switch the card to 944f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath * 1.8V signalling. 945f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath */ 946261bbd463a091b939770255d559bbc89b1bad568Philip Rakity if ((signal_voltage != MMC_SIGNAL_VOLTAGE_330) && cmd11) { 947f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath cmd.opcode = SD_SWITCH_VOLTAGE; 948f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath cmd.arg = 0; 949f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 950f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 951f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath err = mmc_wait_for_cmd(host, &cmd, 0); 952f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (err) 953f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath return err; 954f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 955f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) 956f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath return -EIO; 957f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath } 958f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 959f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath host->ios.signal_voltage = signal_voltage; 960f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 961f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath if (host->ops->start_signal_voltage_switch) 962f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath err = host->ops->start_signal_voltage_switch(host, &host->ios); 963f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 964f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath return err; 965f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath} 966f2119df6b764609af4baceb68caf1e848c1c8aa7Arindam Nath 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9687ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Select timing parameters for host. 969b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman */ 9707ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_set_timing(struct mmc_host *host, unsigned int timing) 971b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman{ 9727ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.timing = timing; 9737ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 974b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman} 975b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 976b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman/* 977d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath * Select appropriate driver type for host. 978d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath */ 979d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nathvoid mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) 980d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath{ 981d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath host->ios.drv_type = drv_type; 982d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath mmc_set_ios(host); 983d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath} 984d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath 985d6d50a15a2897d4133d536dd4343b5cf21163db3Arindam Nath/* 98645f8245b972e360c19aec9032e2a2033b8ac3719Russell King * Apply power to the MMC stack. This is a two-stage process. 98745f8245b972e360c19aec9032e2a2033b8ac3719Russell King * First, we enable power to the card without the clock running. 98845f8245b972e360c19aec9032e2a2033b8ac3719Russell King * We then wait a bit for the power to stabilise. Finally, 98945f8245b972e360c19aec9032e2a2033b8ac3719Russell King * enable the bus drivers and clock to the card. 99045f8245b972e360c19aec9032e2a2033b8ac3719Russell King * 99145f8245b972e360c19aec9032e2a2033b8ac3719Russell King * We must _NOT_ enable the clock prior to power stablising. 99245f8245b972e360c19aec9032e2a2033b8ac3719Russell King * 99345f8245b972e360c19aec9032e2a2033b8ac3719Russell King * If a host does all the power sequencing itself, ignore the 99445f8245b972e360c19aec9032e2a2033b8ac3719Russell King * initial MMC_POWER_UP stage. 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_power_up(struct mmc_host *host) 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 998500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao int bit; 999500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao 1000500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao /* If ocr is set, we use it */ 1001500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao if (host->ocr) 1002500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao bit = ffs(host->ocr) - 1; 1003500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao else 1004500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao bit = fls(host->ocr_avail) - 1; 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.vdd = bit; 1007af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (mmc_host_is_spi(host)) { 1008af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.chip_select = MMC_CS_HIGH; 1009af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; 1010af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } else { 1011af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.chip_select = MMC_CS_DONTCARE; 1012af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; 1013af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.power_mode = MMC_POWER_UP; 1015f218278a456b3c272b480443c89004c3d2a49f18Pierre Ossman host->ios.bus_width = MMC_BUS_WIDTH_1; 1016cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman host->ios.timing = MMC_TIMING_LEGACY; 1017920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1019f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman /* 1020f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * This delay should be sufficient to allow the power supply 1021f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * to reach the minimum voltage. 1022f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman */ 102379bccc5aefb4e64e651abe04f78c3e6bf8acd6f0José M. Fernández mmc_delay(10); 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 102588ae8b866488031b0e2fc05a27440fefec5e6927Hein Tibosch host->ios.clock = host->f_init; 10268dfd0374be84793360db7fff2e635d2cd3bbcb21Sascha Hauer 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.power_mode = MMC_POWER_ON; 1028920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1030f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman /* 1031f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * This delay must be at least 74 clock sizes, or 1 ms, or the 1032f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * time required to reach a stable voltage. 1033f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman */ 103479bccc5aefb4e64e651abe04f78c3e6bf8acd6f0José M. Fernández mmc_delay(10); 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_power_off(struct mmc_host *host) 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.clock = 0; 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.vdd = 0; 1041b33d46c398fd071dccd0815f33620924684860cdUlf Hansson 1042b33d46c398fd071dccd0815f33620924684860cdUlf Hansson /* 1043b33d46c398fd071dccd0815f33620924684860cdUlf Hansson * Reset ocr mask to be the highest possible voltage supported for 1044b33d46c398fd071dccd0815f33620924684860cdUlf Hansson * this mmc host. This value will be used at next power up. 1045b33d46c398fd071dccd0815f33620924684860cdUlf Hansson */ 1046b33d46c398fd071dccd0815f33620924684860cdUlf Hansson host->ocr = 1 << (fls(host->ocr_avail) - 1); 1047b33d46c398fd071dccd0815f33620924684860cdUlf Hansson 1048af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (!mmc_host_is_spi(host)) { 1049af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; 1050af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.chip_select = MMC_CS_DONTCARE; 1051af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.power_mode = MMC_POWER_OFF; 1053f218278a456b3c272b480443c89004c3d2a49f18Pierre Ossman host->ios.bus_width = MMC_BUS_WIDTH_1; 1054cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman host->ios.timing = MMC_TIMING_LEGACY; 1055920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1059393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * Cleanup when the last reference to the bus operator is dropped. 1060393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk */ 1061261172fd1b23769bc7632047e2cb826c9b8b1a50Adrian Bunkstatic void __mmc_release_bus(struct mmc_host *host) 1062393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk{ 1063393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk BUG_ON(!host); 1064393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk BUG_ON(host->bus_refs); 1065393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk BUG_ON(!host->bus_dead); 1066393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1067393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk host->bus_ops = NULL; 1068393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk} 1069393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1070393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk/* 1071393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * Increase reference count of bus operator 1072393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk */ 1073393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunkstatic inline void mmc_bus_get(struct mmc_host *host) 1074393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk{ 1075393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk unsigned long flags; 1076393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1077393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_lock_irqsave(&host->lock, flags); 1078393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk host->bus_refs++; 1079393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_unlock_irqrestore(&host->lock, flags); 1080393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk} 1081393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1082393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk/* 1083393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * Decrease reference count of bus operator and free it if 1084393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * it is the last reference. 1085393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk */ 1086393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunkstatic inline void mmc_bus_put(struct mmc_host *host) 1087393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk{ 1088393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk unsigned long flags; 1089393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1090393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_lock_irqsave(&host->lock, flags); 1091393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk host->bus_refs--; 1092393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk if ((host->bus_refs == 0) && host->bus_ops) 1093393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk __mmc_release_bus(host); 1094393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_unlock_irqrestore(&host->lock, flags); 1095393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk} 1096393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1097393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk/* 10987ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Assign a mmc bus handler to a host. Only one bus handler may control a 10997ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * host at any given time. 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11017ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11037ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman unsigned long flags; 1104e45a1bd20fa5b920901879e85cdf5eda21f78d7cPhilip Langdale 11057ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(!host); 11067ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(!ops); 1107b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman 1108d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 1109bce40a36de574376f41f1ff3c4d212a7da2a3c90Philip Langdale 11107ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_lock_irqsave(&host->lock, flags); 1111bce40a36de574376f41f1ff3c4d212a7da2a3c90Philip Langdale 11127ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(host->bus_ops); 11137ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(host->bus_refs); 1114b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 11157ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_ops = ops; 11167ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_refs = 1; 11177ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_dead = 0; 1118b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 11197ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_unlock_irqrestore(&host->lock, flags); 1120b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman} 1121b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 11227ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 11237ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Remove the current bus handler from a host. Assumes that there are 11247ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * no interesting cards left, so the bus is powered down. 11257ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 11267ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_detach_bus(struct mmc_host *host) 11277ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman{ 11287ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman unsigned long flags; 11297ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 11307ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(!host); 11317ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 1132d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 1133d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->bus_ops); 1134cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman 11357ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_lock_irqsave(&host->lock, flags); 11367ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 11377ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_dead = 1; 11387ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 11397ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_unlock_irqrestore(&host->lock, flags); 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11417ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_power_off(host); 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11437ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_detect_change - process change of state on a MMC socket 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: host which changed state. 11498dc003359cc3996abad9e53a7b2280b272610283Richard Purdie * @delay: optional delay to wait before detection (jiffies) 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 115167a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * MMC drivers should call this when they detect a card has been 115267a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * inserted or removed. The MMC layer will confirm that any 115367a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * present card is still functional, and initialize any newly 115467a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * inserted. 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11568dc003359cc3996abad9e53a7b2280b272610283Richard Purdievoid mmc_detect_change(struct mmc_host *host, unsigned long delay) 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11583b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#ifdef CONFIG_MMC_DEBUG 11591efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman unsigned long flags; 116001f41ec7b36e14da18a4e162ef697ae358f36e37Andrew Morton spin_lock_irqsave(&host->lock, flags); 1161d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(host->removed); 116201f41ec7b36e14da18a4e162ef697ae358f36e37Andrew Morton spin_unlock_irqrestore(&host->lock, flags); 11633b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#endif 11643b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman 1165c4028958b6ecad064b1a6303a6a5906d4fe48d73David Howells mmc_schedule_delayed_work(&host->detect, delay); 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_detect_change); 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1170dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Huntervoid mmc_init_erase(struct mmc_card *card) 1171dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1172dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int sz; 1173dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1174dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (is_power_of_2(card->erase_size)) 1175dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->erase_shift = ffs(card->erase_size) - 1; 1176dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1177dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->erase_shift = 0; 1178dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1179dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1180dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * It is possible to erase an arbitrarily large area of an SD or MMC 1181dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * card. That is not desirable because it can take a long time 1182dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * (minutes) potentially delaying more important I/O, and also the 1183dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * timeout calculations become increasingly hugely over-estimated. 1184dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Consequently, 'pref_erase' is defined as a guide to limit erases 1185dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * to that size and alignment. 1186dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * 1187dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * For SD cards that define Allocation Unit size, limit erases to one 1188dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Allocation Unit at a time. For MMC cards that define High Capacity 1189dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Erase Size, whether it is switched on or not, limit to that size. 1190dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Otherwise just have a stab at a good value. For modern cards it 1191dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * will end up being 4MiB. Note that if the value is too small, it 1192dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * can end up taking longer to erase. 1193dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1194dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card) && card->ssr.au) { 1195dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = card->ssr.au; 1196dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->erase_shift = ffs(card->ssr.au) - 1; 1197dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else if (card->ext_csd.hc_erase_size) { 1198dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = card->ext_csd.hc_erase_size; 1199dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else { 1200dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; 1201dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (sz < 128) 1202dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = 512 * 1024 / 512; 1203dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else if (sz < 512) 1204dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = 1024 * 1024 / 512; 1205dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else if (sz < 1024) 1206dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = 2 * 1024 * 1024 / 512; 1207dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1208dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = 4 * 1024 * 1024 / 512; 1209dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->pref_erase < card->erase_size) 1210dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = card->erase_size; 1211dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else { 1212dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter sz = card->pref_erase % card->erase_size; 1213dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (sz) 1214dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase += card->erase_size - sz; 1215dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1216dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1217dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1218dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1219eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentinstatic unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, 1220eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin unsigned int arg, unsigned int qty) 1221dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1222dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int erase_timeout; 1223dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1224dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->ext_csd.erase_group_def & 1) { 1225dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* High Capacity Erase Group Size uses HC timeouts */ 1226dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg == MMC_TRIM_ARG) 1227dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = card->ext_csd.trim_timeout; 1228dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1229dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = card->ext_csd.hc_erase_timeout; 1230dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else { 1231dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* CSD Erase Group Size uses write timeout */ 1232dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int mult = (10 << card->csd.r2w_factor); 1233dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int timeout_clks = card->csd.tacc_clks * mult; 1234dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int timeout_us; 1235dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1236dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */ 1237dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->csd.tacc_ns < 1000000) 1238dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter timeout_us = (card->csd.tacc_ns * mult) / 1000; 1239dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1240dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter timeout_us = (card->csd.tacc_ns / 1000) * mult; 1241dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1242dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1243dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * ios.clock is only a target. The real clock rate might be 1244dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * less but not that much less, so fudge it by multiplying by 2. 1245dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1246dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter timeout_clks <<= 1; 1247dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter timeout_us += (timeout_clks * 1000) / 12484cf8c6dd2e261da94b87c4deadcc136ab022b6acAdrian Hunter (mmc_host_clk_rate(card->host) / 1000); 1249dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1250dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = timeout_us / 1000; 1251dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1252dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1253dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Theoretically, the calculation could underflow so round up 1254dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * to 1ms in that case. 1255dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1256dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!erase_timeout) 1257dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = 1; 1258dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1259dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1260dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Multiplier for secure operations */ 1261dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg & MMC_SECURE_ARGS) { 1262dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg == MMC_SECURE_ERASE_ARG) 1263dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout *= card->ext_csd.sec_erase_mult; 1264dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1265dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout *= card->ext_csd.sec_trim_mult; 1266dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1267dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1268dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout *= qty; 1269dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1270dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1271dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Ensure at least a 1 second timeout for SPI as per 1272dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * 'mmc_set_data_timeout()' 1273dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1274dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_host_is_spi(card->host) && erase_timeout < 1000) 1275dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = 1000; 1276dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1277eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin return erase_timeout; 1278dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1279dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1280eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentinstatic unsigned int mmc_sd_erase_timeout(struct mmc_card *card, 1281eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin unsigned int arg, 1282eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin unsigned int qty) 1283dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1284eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin unsigned int erase_timeout; 1285eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin 1286dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->ssr.erase_timeout) { 1287dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Erase timeout specified in SD Status Register (SSR) */ 1288eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin erase_timeout = card->ssr.erase_timeout * qty + 1289eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin card->ssr.erase_offset; 1290dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else { 1291dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1292dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Erase timeout not specified in SD Status Register (SSR) so 1293dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * use 250ms per write block. 1294dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1295eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin erase_timeout = 250 * qty; 1296dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1297dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1298dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Must not be less than 1 second */ 1299eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin if (erase_timeout < 1000) 1300eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin erase_timeout = 1000; 1301eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin 1302eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin return erase_timeout; 1303dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1304dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1305eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentinstatic unsigned int mmc_erase_timeout(struct mmc_card *card, 1306eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin unsigned int arg, 1307eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin unsigned int qty) 1308dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1309dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card)) 1310eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin return mmc_sd_erase_timeout(card, arg, qty); 1311dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1312eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin return mmc_mmc_erase_timeout(card, arg, qty); 1313dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1314dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1315dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterstatic int mmc_do_erase(struct mmc_card *card, unsigned int from, 1316dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int to, unsigned int arg) 1317dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 13181278dba167f01bb3c6626d16450d31129d041087Chris Ball struct mmc_command cmd = {0}; 1319dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int qty = 0; 1320dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter int err; 1321dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1322dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1323dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * qty is used to calculate the erase timeout which depends on how many 1324dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * erase groups (or allocation units in SD terminology) are affected. 1325dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * We count erasing part of an erase group as one erase group. 1326dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * For SD, the allocation units are always a power of 2. For MMC, the 1327dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * erase group size is almost certainly also power of 2, but it does not 1328dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * seem to insist on that in the JEDEC standard, so we fall back to 1329dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * division in that case. SD may not specify an allocation unit size, 1330dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * in which case the timeout is based on the number of write blocks. 1331dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * 1332dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Note that the timeout for secure trim 2 will only be correct if the 1333dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * number of erase groups specified is the same as the total of all 1334dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * preceding secure trim 1 commands. Since the power may have been 1335dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * lost since the secure trim 1 commands occurred, it is generally 1336dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * impossible to calculate the secure trim 2 timeout correctly. 1337dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1338dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->erase_shift) 1339dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter qty += ((to >> card->erase_shift) - 1340dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter (from >> card->erase_shift)) + 1; 1341dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else if (mmc_card_sd(card)) 1342dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter qty += to - from + 1; 1343dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1344dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter qty += ((to / card->erase_size) - 1345dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter (from / card->erase_size)) + 1; 1346dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1347dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!mmc_card_blockaddr(card)) { 1348dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter from <<= 9; 1349dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter to <<= 9; 1350dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1351dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1352dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card)) 1353dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = SD_ERASE_WR_BLK_START; 1354dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1355dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = MMC_ERASE_GROUP_START; 1356dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.arg = from; 1357dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; 1358dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_wait_for_cmd(card->host, &cmd, 0); 1359dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err) { 1360dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_ERR "mmc_erase: group start error %d, " 1361dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter "status %#x\n", err, cmd.resp[0]); 1362dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = -EINVAL; 1363dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1364dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1365dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1366dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter memset(&cmd, 0, sizeof(struct mmc_command)); 1367dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card)) 1368dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = SD_ERASE_WR_BLK_END; 1369dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1370dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = MMC_ERASE_GROUP_END; 1371dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.arg = to; 1372dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; 1373dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_wait_for_cmd(card->host, &cmd, 0); 1374dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err) { 1375dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_ERR "mmc_erase: group end error %d, status %#x\n", 1376dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err, cmd.resp[0]); 1377dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = -EINVAL; 1378dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1379dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1380dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1381dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter memset(&cmd, 0, sizeof(struct mmc_command)); 1382dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = MMC_ERASE; 1383dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.arg = arg; 1384dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; 1385eaa02f751ff4f8abfc2e55a15c20a5a274244418Andrei Warkentin cmd.cmd_timeout_ms = mmc_erase_timeout(card, arg, qty); 1386dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_wait_for_cmd(card->host, &cmd, 0); 1387dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err) { 1388dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_ERR "mmc_erase: erase error %d, status %#x\n", 1389dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err, cmd.resp[0]); 1390dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = -EIO; 1391dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1392dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1393dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1394dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_host_is_spi(card->host)) 1395dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1396dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1397dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter do { 1398dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter memset(&cmd, 0, sizeof(struct mmc_command)); 1399dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = MMC_SEND_STATUS; 1400dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.arg = card->rca << 16; 1401dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 1402dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Do not retry else we can't see errors */ 1403dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_wait_for_cmd(card->host, &cmd, 0); 1404dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err || (cmd.resp[0] & 0xFDF92000)) { 1405dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_ERR "error %d requesting status %#x\n", 1406dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err, cmd.resp[0]); 1407dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = -EIO; 1408dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1409dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1410dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || 1411dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter R1_CURRENT_STATE(cmd.resp[0]) == 7); 1412dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterout: 1413dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return err; 1414dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1415dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1416dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter/** 1417dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * mmc_erase - erase sectors. 1418dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * @card: card to erase 1419dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * @from: first sector to erase 1420dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * @nr: number of sectors to erase 1421dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * @arg: erase command argument (SD supports only %MMC_ERASE_ARG) 1422dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * 1423dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Caller must claim host before calling this function. 1424dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1425dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, 1426dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int arg) 1427dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1428dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int rem, to = from + nr; 1429dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1430dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!(card->host->caps & MMC_CAP_ERASE) || 1431dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter !(card->csd.cmdclass & CCC_ERASE)) 1432dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1433dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1434dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!card->erase_size) 1435dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1436dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1437dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card) && arg != MMC_ERASE_ARG) 1438dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1439dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1440dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if ((arg & MMC_SECURE_ARGS) && 1441dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) 1442dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1443dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1444dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if ((arg & MMC_TRIM_ARGS) && 1445dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) 1446dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1447dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1448dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg == MMC_SECURE_ERASE_ARG) { 1449dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (from % card->erase_size || nr % card->erase_size) 1450dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EINVAL; 1451dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1452dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1453dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg == MMC_ERASE_ARG) { 1454dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter rem = from % card->erase_size; 1455dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (rem) { 1456dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter rem = card->erase_size - rem; 1457dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter from += rem; 1458dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (nr > rem) 1459dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter nr -= rem; 1460dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1461dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1462dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1463dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter rem = nr % card->erase_size; 1464dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (rem) 1465dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter nr -= rem; 1466dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1467dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1468dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (nr == 0) 1469dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1470dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1471dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter to = from + nr; 1472dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1473dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (to <= from) 1474dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EINVAL; 1475dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1476dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 'from' and 'to' are inclusive */ 1477dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter to -= 1; 1478dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1479dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return mmc_do_erase(card, from, to, arg); 1480dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1481dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_erase); 1482dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1483dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_can_erase(struct mmc_card *card) 1484dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1485dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if ((card->host->caps & MMC_CAP_ERASE) && 1486dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter (card->csd.cmdclass & CCC_ERASE) && card->erase_size) 1487dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 1; 1488dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1489dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1490dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_can_erase); 1491dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1492dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_can_trim(struct mmc_card *card) 1493dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1494dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) 1495dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 1; 1496dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1497dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1498dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_can_trim); 1499dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1500dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_can_secure_erase_trim(struct mmc_card *card) 1501dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1502dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) 1503dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 1; 1504dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1505dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1506dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_can_secure_erase_trim); 1507dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1508dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, 1509dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int nr) 1510dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1511dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!card->erase_size) 1512dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1513dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (from % card->erase_size || nr % card->erase_size) 1514dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1515dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 1; 1516dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1517dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_erase_group_aligned); 15181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15190f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunterint mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) 15200f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter{ 15211278dba167f01bb3c6626d16450d31129d041087Chris Ball struct mmc_command cmd = {0}; 15220f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter 15230f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter if (mmc_card_blockaddr(card) || mmc_card_ddr_mode(card)) 15240f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter return 0; 15250f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter 15260f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter cmd.opcode = MMC_SET_BLOCKLEN; 15270f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter cmd.arg = blocklen; 15280f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; 15290f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter return mmc_wait_for_cmd(card->host, &cmd, 5); 15300f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter} 15310f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian HunterEXPORT_SYMBOL(mmc_set_blocklen); 15320f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter 1533807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Rossstatic int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) 1534807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross{ 1535807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross host->f_init = freq; 1536807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1537807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross#ifdef CONFIG_MMC_DEBUG 1538807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross pr_info("%s: %s: trying to init card at %u Hz\n", 1539807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_hostname(host), __func__, host->f_init); 1540807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross#endif 1541807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_power_up(host); 15422f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity 15432f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity /* 15442f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity * sdio_reset sends CMD52 to reset card. Since we do not know 15452f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity * if the card is being re-initialized, just send it. CMD52 15462f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity * should be ignored by SD/eMMC cards. 15472f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity */ 1548807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross sdio_reset(host); 1549807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_go_idle(host); 1550807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1551807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_send_if_cond(host, host->ocr_avail); 1552807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1553807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross /* Order's important: probe SDIO, then SD, then MMC */ 1554807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (!mmc_attach_sdio(host)) 1555807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross return 0; 1556807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (!mmc_attach_sd(host)) 1557807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross return 0; 1558807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (!mmc_attach_mmc(host)) 1559807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross return 0; 1560807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1561807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_power_off(host); 1562807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross return -EIO; 1563807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross} 1564807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1565b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossmanvoid mmc_rescan(struct work_struct *work) 15661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1567807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; 1568c4028958b6ecad064b1a6303a6a5906d4fe48d73David Howells struct mmc_host *host = 1569c4028958b6ecad064b1a6303a6a5906d4fe48d73David Howells container_of(work, struct mmc_host, detect.work); 157088ae8b866488031b0e2fc05a27440fefec5e6927Hein Tibosch int i; 15714c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 1572807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (host->rescan_disable) 15734c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky return; 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15757ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_get(host); 1576b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman 157730201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen /* 157830201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen * if there is a _removable_ card registered, check whether it is 157930201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen * still present 158030201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen */ 158130201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen if (host->bus_ops && host->bus_ops->detect && !host->bus_dead 1582bad3babace2ee4d1763b4016a662a5c660ab92e9Ohad Ben-Cohen && !(host->caps & MMC_CAP_NONREMOVABLE)) 158394d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer host->bus_ops->detect(host); 158494d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer 1585c584179828b268152f5ff82dab529a2c095b09acChris Ball /* 1586c584179828b268152f5ff82dab529a2c095b09acChris Ball * Let mmc_bus_put() free the bus/bus_ops if we've found that 1587c584179828b268152f5ff82dab529a2c095b09acChris Ball * the card is no longer present. 1588c584179828b268152f5ff82dab529a2c095b09acChris Ball */ 158994d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_bus_put(host); 159094d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_bus_get(host); 159194d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer 159294d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer /* if there still is a card present, stop here */ 159394d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (host->bus_ops != NULL) { 15947ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 159594d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer goto out; 159694d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer } 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 159894d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer /* 159994d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer * Only we can add a new handler, so it's safe to 160094d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer * release the lock here. 160194d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer */ 160294d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_bus_put(host); 16031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 160494d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (host->ops->get_cd && host->ops->get_cd(host) == 0) 160594d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer goto out; 16061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1607807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_claim_host(host); 160888ae8b866488031b0e2fc05a27440fefec5e6927Hein Tibosch for (i = 0; i < ARRAY_SIZE(freqs); i++) { 1609807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) 1610807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross break; 161106b2233a20bf25c8ee57b7c6e13f528309ac6edcJaehoon Chung if (freqs[i] <= host->f_min) 1612807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross break; 161388ae8b866488031b0e2fc05a27440fefec5e6927Hein Tibosch } 1614807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_release_host(host); 1615807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1616807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross out: 161728f52482b41edc88cdf575aa6ed414c6e116ce10Anton Vorontsov if (host->caps & MMC_CAP_NEEDS_POLL) 161828f52482b41edc88cdf575aa6ed414c6e116ce10Anton Vorontsov mmc_schedule_delayed_work(&host->detect, HZ); 16191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1621b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossmanvoid mmc_start_host(struct mmc_host *host) 16221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1623b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossman mmc_power_off(host); 1624b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossman mmc_detect_change(host, 0); 16251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1627b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossmanvoid mmc_stop_host(struct mmc_host *host) 16281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16293b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#ifdef CONFIG_MMC_DEBUG 16301efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman unsigned long flags; 16311efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman spin_lock_irqsave(&host->lock, flags); 16323b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman host->removed = 1; 16331efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman spin_unlock_irqrestore(&host->lock, flags); 16343b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#endif 16353b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman 16368ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->caps & MMC_CAP_DISABLE) 16378ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter cancel_delayed_work(&host->disable); 1638d9bcbf343ec63e1104b5276195888ee06b4d086fGuennadi Liakhovetski cancel_delayed_work_sync(&host->detect); 16393b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman mmc_flush_scheduled_work(); 16403b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman 1641da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre /* clear pm flags now and let card drivers set them as needed */ 1642da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre host->pm_flags = 0; 1643da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre 16447ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_get(host); 16457ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (host->bus_ops && !host->bus_dead) { 16467ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (host->bus_ops->remove) 16477ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_ops->remove(host); 16487ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 16497ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_claim_host(host); 16507ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_detach_bus(host); 16517ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_release_host(host); 165253509f0fe28e049e772897aa8fa1f5183b6823a2Denis Karpov mmc_bus_put(host); 165353509f0fe28e049e772897aa8fa1f5183b6823a2Denis Karpov return; 16541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16557ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 16567ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 16577ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(host->card); 16581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_power_off(host); 16601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 166212ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohenint mmc_power_save_host(struct mmc_host *host) 1663eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter{ 166412ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen int ret = 0; 166512ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen 1666eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_get(host); 1667eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1668eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) { 1669eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_put(host); 167012ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen return -EINVAL; 1671eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter } 1672eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1673eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter if (host->bus_ops->power_save) 167412ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen ret = host->bus_ops->power_save(host); 1675eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1676eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_put(host); 1677eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1678eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_power_off(host); 167912ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen 168012ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen return ret; 1681eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter} 1682eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian HunterEXPORT_SYMBOL(mmc_power_save_host); 1683eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 168412ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohenint mmc_power_restore_host(struct mmc_host *host) 1685eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter{ 168612ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen int ret; 168712ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen 1688eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_get(host); 1689eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1690eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) { 1691eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_put(host); 169212ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen return -EINVAL; 1693eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter } 1694eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1695eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_power_up(host); 169612ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen ret = host->bus_ops->power_restore(host); 1697eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1698eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_put(host); 169912ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen 170012ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen return ret; 1701eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter} 1702eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian HunterEXPORT_SYMBOL(mmc_power_restore_host); 1703eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1704b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinenint mmc_card_awake(struct mmc_host *host) 1705b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen{ 1706b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen int err = -ENOSYS; 1707b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1708b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen mmc_bus_get(host); 1709b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1710b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen if (host->bus_ops && !host->bus_dead && host->bus_ops->awake) 1711b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen err = host->bus_ops->awake(host); 1712b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1713b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen mmc_bus_put(host); 1714b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1715b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen return err; 1716b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen} 1717b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko LavinenEXPORT_SYMBOL(mmc_card_awake); 1718b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1719b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinenint mmc_card_sleep(struct mmc_host *host) 1720b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen{ 1721b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen int err = -ENOSYS; 1722b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1723b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen mmc_bus_get(host); 1724b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1725b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen if (host->bus_ops && !host->bus_dead && host->bus_ops->awake) 1726b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen err = host->bus_ops->sleep(host); 1727b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1728b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen mmc_bus_put(host); 1729b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1730b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen return err; 1731b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen} 1732b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko LavinenEXPORT_SYMBOL(mmc_card_sleep); 1733b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1734b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinenint mmc_card_can_sleep(struct mmc_host *host) 1735b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen{ 1736b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen struct mmc_card *card = host->card; 1737b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1738b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen if (card && mmc_card_mmc(card) && card->ext_csd.rev >= 3) 1739b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen return 1; 1740b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen return 0; 1741b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen} 1742b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko LavinenEXPORT_SYMBOL(mmc_card_can_sleep); 1743b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_PM 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_suspend_host - suspend a host 17481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host 17491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17501a13f8fa76c880be41d6b1e6a2b44404bcbfdf9eMatt Flemingint mmc_suspend_host(struct mmc_host *host) 17511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 175295cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre int err = 0; 175395cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre 17548ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->caps & MMC_CAP_DISABLE) 17558ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter cancel_delayed_work(&host->disable); 17567de427d088a967d2173739e21e744921d5496a8bJorg Schummer cancel_delayed_work(&host->detect); 1757b5af25bee2de2f6cd1ac74ba737cbc4f3d303e5dPierre Ossman mmc_flush_scheduled_work(); 1758b5af25bee2de2f6cd1ac74ba737cbc4f3d303e5dPierre Ossman 17597ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_get(host); 17607ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (host->bus_ops && !host->bus_dead) { 17616abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (host->bus_ops->suspend) 176295cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre err = host->bus_ops->suspend(host); 17631c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen if (err == -ENOSYS || !host->bus_ops->resume) { 17641c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen /* 17651c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen * We simply "remove" the card in this case. 17661c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen * It will be redetected on resume. 17671c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen */ 17681c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen if (host->bus_ops->remove) 17691c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen host->bus_ops->remove(host); 17701c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen mmc_claim_host(host); 17711c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen mmc_detach_bus(host); 17721c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen mmc_release_host(host); 17731c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen host->pm_flags = 0; 17741c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen err = 0; 17751c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen } 1776b5af25bee2de2f6cd1ac74ba737cbc4f3d303e5dPierre Ossman } 17777ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 17787ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1779a5e9425d2010978c5f85986cc70a9fa0c0d5b912Ohad Ben-Cohen if (!err && !mmc_card_keep_power(host)) 178095cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre mmc_power_off(host); 17811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 178295cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre return err; 17831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_suspend_host); 17861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_resume_host - resume a previously suspended host 17891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host 17901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint mmc_resume_host(struct mmc_host *host) 17921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 179395cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre int err = 0; 179495cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre 17956abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_bus_get(host); 17966abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (host->bus_ops && !host->bus_dead) { 1797a5e9425d2010978c5f85986cc70a9fa0c0d5b912Ohad Ben-Cohen if (!mmc_card_keep_power(host)) { 1798da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre mmc_power_up(host); 1799da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre mmc_select_voltage(host, host->ocr); 1800e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen /* 1801e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen * Tell runtime PM core we just powered up the card, 1802e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen * since it still believes the card is powered off. 1803e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen * Note that currently runtime PM is only enabled 1804e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen * for SDIO cards that are MMC_CAP_POWER_OFF_CARD 1805e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen */ 1806e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen if (mmc_card_sdio(host->card) && 1807e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen (host->caps & MMC_CAP_POWER_OFF_CARD)) { 1808e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen pm_runtime_disable(&host->card->dev); 1809e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen pm_runtime_set_active(&host->card->dev); 1810e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen pm_runtime_enable(&host->card->dev); 1811e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen } 1812da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre } 18136abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman BUG_ON(!host->bus_ops->resume); 181495cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre err = host->bus_ops->resume(host); 181595cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre if (err) { 181695cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre printk(KERN_WARNING "%s: error %d during resume " 181795cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre "(card was removed?)\n", 181895cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre mmc_hostname(host), err); 181995cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre err = 0; 182095cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre } 18216abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman } 1822a8e6df7343cf67c9104955da0de70075a6ee1dfdEliad Peller host->pm_flags &= ~MMC_PM_KEEP_POWER; 18236abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_bus_put(host); 18246abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 182595cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre return err; 18261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_resume_host); 18281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18294c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky/* Do the card removal on suspend if card is assumed removeable 18304c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky * Do that in pm notifier while userspace isn't yet frozen, so we will be able 18314c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky to sync the card. 18324c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky*/ 18334c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitskyint mmc_pm_notify(struct notifier_block *notify_block, 18344c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky unsigned long mode, void *unused) 18354c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky{ 18364c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky struct mmc_host *host = container_of( 18374c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky notify_block, struct mmc_host, pm_notify); 18384c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky unsigned long flags; 18394c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18404c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18414c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky switch (mode) { 18424c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky case PM_HIBERNATION_PREPARE: 18434c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky case PM_SUSPEND_PREPARE: 18444c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18454c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky spin_lock_irqsave(&host->lock, flags); 18464c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky host->rescan_disable = 1; 18474c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky spin_unlock_irqrestore(&host->lock, flags); 18484c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky cancel_delayed_work_sync(&host->detect); 18494c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18504c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky if (!host->bus_ops || host->bus_ops->suspend) 18514c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky break; 18524c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18534c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky mmc_claim_host(host); 18544c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18554c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky if (host->bus_ops->remove) 18564c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky host->bus_ops->remove(host); 18574c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18584c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky mmc_detach_bus(host); 18594c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky mmc_release_host(host); 18604c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky host->pm_flags = 0; 18614c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky break; 18624c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18634c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky case PM_POST_SUSPEND: 18644c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky case PM_POST_HIBERNATION: 1865274476f8fe0b6ac9bac542cc39de12c3dd0f43f6Takashi Iwai case PM_POST_RESTORE: 18664c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18674c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky spin_lock_irqsave(&host->lock, flags); 18684c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky host->rescan_disable = 0; 18694c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky spin_unlock_irqrestore(&host->lock, flags); 18704c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky mmc_detect_change(host, 0); 18714c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18724c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky } 18734c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18744c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky return 0; 18754c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky} 18761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 18771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1878ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic int __init mmc_init(void) 1879ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 1880ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman int ret; 1881ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 18820d9ee5b2e9aac981fa063339daf04320eac610d1Tejun Heo workqueue = alloc_ordered_workqueue("kmmcd", 0); 1883ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman if (!workqueue) 1884ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman return -ENOMEM; 1885ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 1886ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman ret = mmc_register_bus(); 1887e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman if (ret) 1888e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman goto destroy_workqueue; 1889e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1890e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman ret = mmc_register_host_class(); 1891e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman if (ret) 1892e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman goto unregister_bus; 1893e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1894e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman ret = sdio_register_bus(); 1895e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman if (ret) 1896e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman goto unregister_host_class; 1897e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1898e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman return 0; 1899e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1900e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossmanunregister_host_class: 1901e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman mmc_unregister_host_class(); 1902e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossmanunregister_bus: 1903e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman mmc_unregister_bus(); 1904e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossmandestroy_workqueue: 1905e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman destroy_workqueue(workqueue); 1906e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1907ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman return ret; 1908ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 1909ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 1910ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic void __exit mmc_exit(void) 1911ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 1912e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman sdio_unregister_bus(); 1913ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman mmc_unregister_host_class(); 1914ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman mmc_unregister_bus(); 1915ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman destroy_workqueue(workqueue); 1916ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 1917ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 191826074962e8f547b96614dbe248748ba2a1996ca3Nicolas Pitresubsys_initcall(mmc_init); 1919ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanmodule_exit(mmc_exit); 1920ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 19211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 1922