core.c revision 2f94e55ae5ddad83e661002985d2ea11b6d51d3d
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{ 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_request mrq; 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 241d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(&mrq, 0, sizeof(struct mmc_request)); 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(cmd->resp, 0, sizeof(cmd->resp)); 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->retries = retries; 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq.cmd = cmd; 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->data = NULL; 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_wait_for_req(host, &mrq); 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cmd->error; 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_wait_for_cmd); 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 258335eadf2ef6a1122a720aea98e758e5d431da87dPierre Ossman/** 259d773d7255199a6c8934e197756f54a1115dd127bRussell King * mmc_set_data_timeout - set the timeout for a data command 260d773d7255199a6c8934e197756f54a1115dd127bRussell King * @data: data phase for command 261d773d7255199a6c8934e197756f54a1115dd127bRussell King * @card: the MMC card associated with the data transfer 26267a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * 26367a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * Computes the data timeout parameters according to the 26467a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * correct algorithm given the card type. 265d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 266b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossmanvoid mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) 267d773d7255199a6c8934e197756f54a1115dd127bRussell King{ 268d773d7255199a6c8934e197756f54a1115dd127bRussell King unsigned int mult; 269d773d7255199a6c8934e197756f54a1115dd127bRussell King 270d773d7255199a6c8934e197756f54a1115dd127bRussell King /* 271e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman * SDIO cards only define an upper 1 s limit on access. 272e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman */ 273e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman if (mmc_card_sdio(card)) { 274e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman data->timeout_ns = 1000000000; 275e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman data->timeout_clks = 0; 276e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman return; 277e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman } 278e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman 279e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman /* 280d773d7255199a6c8934e197756f54a1115dd127bRussell King * SD cards use a 100 multiplier rather than 10 281d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 282d773d7255199a6c8934e197756f54a1115dd127bRussell King mult = mmc_card_sd(card) ? 100 : 10; 283d773d7255199a6c8934e197756f54a1115dd127bRussell King 284d773d7255199a6c8934e197756f54a1115dd127bRussell King /* 285d773d7255199a6c8934e197756f54a1115dd127bRussell King * Scale up the multiplier (and therefore the timeout) by 286d773d7255199a6c8934e197756f54a1115dd127bRussell King * the r2w factor for writes. 287d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 288b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossman if (data->flags & MMC_DATA_WRITE) 289d773d7255199a6c8934e197756f54a1115dd127bRussell King mult <<= card->csd.r2w_factor; 290d773d7255199a6c8934e197756f54a1115dd127bRussell King 291d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_ns = card->csd.tacc_ns * mult; 292d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_clks = card->csd.tacc_clks * mult; 293d773d7255199a6c8934e197756f54a1115dd127bRussell King 294d773d7255199a6c8934e197756f54a1115dd127bRussell King /* 295d773d7255199a6c8934e197756f54a1115dd127bRussell King * SD cards also have an upper limit on the timeout. 296d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 297d773d7255199a6c8934e197756f54a1115dd127bRussell King if (mmc_card_sd(card)) { 298d773d7255199a6c8934e197756f54a1115dd127bRussell King unsigned int timeout_us, limit_us; 299d773d7255199a6c8934e197756f54a1115dd127bRussell King 300d773d7255199a6c8934e197756f54a1115dd127bRussell King timeout_us = data->timeout_ns / 1000; 301e9b86841b372de01ae865080118e29159d8b7c39Linus Walleij if (mmc_host_clk_rate(card->host)) 302e9b86841b372de01ae865080118e29159d8b7c39Linus Walleij timeout_us += data->timeout_clks * 1000 / 303e9b86841b372de01ae865080118e29159d8b7c39Linus Walleij (mmc_host_clk_rate(card->host) / 1000); 304d773d7255199a6c8934e197756f54a1115dd127bRussell King 305b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossman if (data->flags & MMC_DATA_WRITE) 306493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman /* 307493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman * The limit is really 250 ms, but that is 308493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman * insufficient for some crappy cards. 309493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman */ 310493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman limit_us = 300000; 311d773d7255199a6c8934e197756f54a1115dd127bRussell King else 312d773d7255199a6c8934e197756f54a1115dd127bRussell King limit_us = 100000; 313d773d7255199a6c8934e197756f54a1115dd127bRussell King 314fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale /* 315fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale * SDHC cards always use these fixed values. 316fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale */ 317fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale if (timeout_us > limit_us || mmc_card_blockaddr(card)) { 318d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_ns = limit_us * 1000; 319d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_clks = 0; 320d773d7255199a6c8934e197756f54a1115dd127bRussell King } 321d773d7255199a6c8934e197756f54a1115dd127bRussell King } 322c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees /* 323c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * Some cards need very high timeouts if driven in SPI mode. 324c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * The worst observed timeout was 900ms after writing a 325c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * continuous stream of data until the internal logic 326c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * overflowed. 327c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees */ 328c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (mmc_host_is_spi(card->host)) { 329c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (data->flags & MMC_DATA_WRITE) { 330c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (data->timeout_ns < 1000000000) 331c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees data->timeout_ns = 1000000000; /* 1s */ 332c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees } else { 333c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (data->timeout_ns < 100000000) 334c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees data->timeout_ns = 100000000; /* 100ms */ 335c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees } 336c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees } 337d773d7255199a6c8934e197756f54a1115dd127bRussell King} 338d773d7255199a6c8934e197756f54a1115dd127bRussell KingEXPORT_SYMBOL(mmc_set_data_timeout); 339d773d7255199a6c8934e197756f54a1115dd127bRussell King 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 341ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * mmc_align_data_size - pads a transfer size to a more optimal value 342ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * @card: the MMC card associated with the data transfer 343ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * @sz: original transfer size 344ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * 345ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * Pads the original data size with a number of extra bytes in 346ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * order to avoid controller bugs and/or performance hits 347ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * (e.g. some controllers revert to PIO for certain sizes). 348ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * 349ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * Returns the improved size, which might be unmodified. 350ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * 351ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * Note that this function is only relevant when issuing a 352ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * single scatter gather entry. 353ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman */ 354ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossmanunsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) 355ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman{ 356ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman /* 357ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * FIXME: We don't have a system for the controller to tell 358ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * the core about its problems yet, so for now we just 32-bit 359ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * align the size. 360ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman */ 361ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman sz = ((sz + 3) / 4) * 4; 362ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman 363ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman return sz; 364ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman} 365ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre OssmanEXPORT_SYMBOL(mmc_align_data_size); 366ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman 367ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman/** 3688ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * mmc_host_enable - enable a host. 3698ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * @host: mmc host to enable 3708ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * 3718ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * Hosts that support power saving can use the 'enable' and 'disable' 3728ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * methods to exit and enter power saving states. For more information 3738ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * see comments for struct mmc_host_ops. 3748ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter */ 3758ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterint mmc_host_enable(struct mmc_host *host) 3768ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 3778ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!(host->caps & MMC_CAP_DISABLE)) 3788ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 3798ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3808ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->en_dis_recurs) 3818ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 3828ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3838ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->nesting_cnt++) 3848ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 3858ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3868ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter cancel_delayed_work_sync(&host->disable); 3878ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3888ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->enabled) 3898ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 3908ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3918ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->ops->enable) { 3928ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int err; 3938ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3948ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 1; 3958ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter err = host->ops->enable(host); 3968ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 0; 3978ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3988ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (err) { 3998ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter pr_debug("%s: enable error %d\n", 4008ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_hostname(host), err); 4018ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return err; 4028ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4038ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4048ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->enabled = 1; 4058ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4068ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 4078ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian HunterEXPORT_SYMBOL(mmc_host_enable); 4088ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4098ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterstatic int mmc_host_do_disable(struct mmc_host *host, int lazy) 4108ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 4118ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->ops->disable) { 4128ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int err; 4138ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4148ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 1; 4158ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter err = host->ops->disable(host, lazy); 4168ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 0; 4178ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4188ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (err < 0) { 4198ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter pr_debug("%s: disable error %d\n", 4208ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_hostname(host), err); 4218ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return err; 4228ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4238ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (err > 0) { 4248ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter unsigned long delay = msecs_to_jiffies(err); 4258ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4268ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_schedule_delayed_work(&host->disable, delay); 4278ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4288ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4298ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->enabled = 0; 4308ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4318ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 4328ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4338ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter/** 4348ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * mmc_host_disable - disable a host. 4358ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * @host: mmc host to disable 4368ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * 4378ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * Hosts that support power saving can use the 'enable' and 'disable' 4388ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * methods to exit and enter power saving states. For more information 4398ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * see comments for struct mmc_host_ops. 4408ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter */ 4418ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterint mmc_host_disable(struct mmc_host *host) 4428ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 4438ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int err; 4448ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4458ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!(host->caps & MMC_CAP_DISABLE)) 4468ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4478ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4488ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->en_dis_recurs) 4498ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4508ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4518ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (--host->nesting_cnt) 4528ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4538ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4548ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!host->enabled) 4558ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4568ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4578ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter err = mmc_host_do_disable(host, 0); 4588ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return err; 4598ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 4608ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian HunterEXPORT_SYMBOL(mmc_host_disable); 4618ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4628ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter/** 4632342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * __mmc_claim_host - exclusively claim a host 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host to claim 4652342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * @abort: whether or not the operation should be aborted 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 4672342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * Claim a host for a set of operations. If @abort is non null and 4682342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * dereference a non-zero value then this will return prematurely with 4692342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * that non-zero value without acquiring the lock. Returns zero 4702342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * with the lock held otherwise. 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4722342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitreint __mmc_claim_host(struct mmc_host *host, atomic_t *abort) 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 4762342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre int stop; 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 478cf795bfb3ad4e2f8f6bb346aa8edb8272d4c70a2Pierre Ossman might_sleep(); 479cf795bfb3ad4e2f8f6bb346aa8edb8272d4c70a2Pierre Ossman 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&host->wq, &wait); 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&host->lock, flags); 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (1) { 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 4842342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre stop = abort ? atomic_read(abort) : 0; 485319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (stop || !host->claimed || host->claimer == current) 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&host->lock, flags); 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&host->lock, flags); 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_RUNNING); 492319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (!stop) { 4932342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre host->claimed = 1; 494319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimer = current; 495319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claim_cnt += 1; 496319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter } else 4972342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre wake_up(&host->wq); 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&host->lock, flags); 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&host->wq, &wait); 5008ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!stop) 5018ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_host_enable(host); 5022342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre return stop; 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5052342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas PitreEXPORT_SYMBOL(__mmc_claim_host); 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 507319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter/** 508319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * mmc_try_claim_host - try exclusively to claim a host 509319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * @host: mmc host to claim 510319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * 511319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * Returns %1 if the host is claimed, %0 otherwise. 512319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter */ 513319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunterint mmc_try_claim_host(struct mmc_host *host) 5148ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 5158ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int claimed_host = 0; 5168ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter unsigned long flags; 5178ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5188ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter spin_lock_irqsave(&host->lock, flags); 519319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (!host->claimed || host->claimer == current) { 5208ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->claimed = 1; 521319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimer = current; 522319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claim_cnt += 1; 5238ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter claimed_host = 1; 5248ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 5258ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter spin_unlock_irqrestore(&host->lock, flags); 5268ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return claimed_host; 5278ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 528319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian HunterEXPORT_SYMBOL(mmc_try_claim_host); 5298ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5308ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterstatic void mmc_do_release_host(struct mmc_host *host) 5318ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 5328ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter unsigned long flags; 5338ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5348ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter spin_lock_irqsave(&host->lock, flags); 535319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (--host->claim_cnt) { 536319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter /* Release for nested claim */ 537319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter spin_unlock_irqrestore(&host->lock, flags); 538319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter } else { 539319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimed = 0; 540319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimer = NULL; 541319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter spin_unlock_irqrestore(&host->lock, flags); 542319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter wake_up(&host->wq); 543319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter } 5448ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 5458ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5468ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Huntervoid mmc_host_deeper_disable(struct work_struct *work) 5478ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 5488ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter struct mmc_host *host = 5498ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter container_of(work, struct mmc_host, disable.work); 5508ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5518ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter /* If the host is claimed then we do not want to disable it anymore */ 5528ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!mmc_try_claim_host(host)) 5538ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return; 5548ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_host_do_disable(host, 1); 5558ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_do_release_host(host); 5568ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 5578ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5588ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter/** 5598ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * mmc_host_lazy_disable - lazily disable a host. 5608ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * @host: mmc host to disable 5618ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * 5628ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * Hosts that support power saving can use the 'enable' and 'disable' 5638ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * methods to exit and enter power saving states. For more information 5648ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * see comments for struct mmc_host_ops. 5658ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter */ 5668ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterint mmc_host_lazy_disable(struct mmc_host *host) 5678ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 5688ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!(host->caps & MMC_CAP_DISABLE)) 5698ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5708ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5718ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->en_dis_recurs) 5728ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5738ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5748ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (--host->nesting_cnt) 5758ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5768ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5778ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!host->enabled) 5788ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5798ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5808ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->disable_delay) { 5818ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_schedule_delayed_work(&host->disable, 5828ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter msecs_to_jiffies(host->disable_delay)); 5838ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5848ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } else 5858ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return mmc_host_do_disable(host, 1); 5868ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 5878ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian HunterEXPORT_SYMBOL(mmc_host_lazy_disable); 5888ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_release_host - release a host 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host to release 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Release a MMC host, allowing others to claim the host 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for their operations. 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid mmc_release_host(struct mmc_host *host) 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 598d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6008ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_host_lazy_disable(host); 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6028ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_do_release_host(host); 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_release_host); 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6077ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 6087ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Internal function that does the actual ios call to the host driver, 6097ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * optionally printing some debug output. 6107ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 611920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell Kingstatic inline void mmc_set_ios(struct mmc_host *host) 612920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King{ 613920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King struct mmc_ios *ios = &host->ios; 614920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King 615cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " 616cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman "width %u timing %u\n", 617920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_hostname(host), ios->clock, ios->bus_mode, 618920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King ios->power_mode, ios->chip_select, ios->vdd, 619cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman ios->bus_width, ios->timing); 620fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale 62104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij if (ios->clock > 0) 62204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij mmc_set_ungated(host); 623920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King host->ops->set_ios(host, ios); 624920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King} 625920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King 6267ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 6277ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Control chip select pin on a host. 6287ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 629da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossmanvoid mmc_set_chip_select(struct mmc_host *host, int mode) 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 631da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman host->ios.chip_select = mode; 632da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman mmc_set_ios(host); 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 6367ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Sets the host clock to the highest possible frequency that 6377ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * is below "hz". 6387ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 6397ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_set_clock(struct mmc_host *host, unsigned int hz) 6407ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 6417ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman WARN_ON(hz < host->f_min); 6427ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 6437ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (hz > host->f_max) 6447ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman hz = host->f_max; 6457ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 6467ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.clock = hz; 6477ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 6487ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 6497ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 65004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij#ifdef CONFIG_MMC_CLKGATE 65104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij/* 65204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * This gates the clock by setting it to 0 Hz. 65304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij */ 65404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleijvoid mmc_gate_clock(struct mmc_host *host) 65504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij{ 65604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij unsigned long flags; 65704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 65804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij spin_lock_irqsave(&host->clk_lock, flags); 65904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij host->clk_old = host->ios.clock; 66004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij host->ios.clock = 0; 66104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij host->clk_gated = true; 66204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij spin_unlock_irqrestore(&host->clk_lock, flags); 66304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij mmc_set_ios(host); 66404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij} 66504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 66604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij/* 66704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * This restores the clock from gating by using the cached 66804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * clock value. 66904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij */ 67004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleijvoid mmc_ungate_clock(struct mmc_host *host) 67104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij{ 67204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij /* 67304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * We should previously have gated the clock, so the clock shall 67404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * be 0 here! The clock may however be 0 during initialization, 67504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * when some request operations are performed before setting 67604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * the frequency. When ungate is requested in that situation 67704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * we just ignore the call. 67804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij */ 67904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij if (host->clk_old) { 68004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij BUG_ON(host->ios.clock); 68104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij /* This call will also set host->clk_gated to false */ 68204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij mmc_set_clock(host, host->clk_old); 68304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij } 68404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij} 68504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 68604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleijvoid mmc_set_ungated(struct mmc_host *host) 68704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij{ 68804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij unsigned long flags; 68904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 69004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij /* 69104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * We've been given a new frequency while the clock is gated, 69204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij * so make sure we regard this as ungating it. 69304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij */ 69404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij spin_lock_irqsave(&host->clk_lock, flags); 69504566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij host->clk_gated = false; 69604566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij spin_unlock_irqrestore(&host->clk_lock, flags); 69704566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij} 69804566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 69904566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij#else 70004566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleijvoid mmc_set_ungated(struct mmc_host *host) 70104566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij{ 70204566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij} 70304566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij#endif 70404566831a703ae3ef4b49a2deae261c9ed26e020Linus Walleij 7057ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 7067ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Change the bus mode (open drain/push-pull) of a host. 7077ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 7087ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) 7097ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 7107ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.bus_mode = mode; 7117ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 7127ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 7137ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 7147ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 7150f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter * Change data bus width and DDR mode of a host. 7167ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 71749e3b5a44f8abd33c8693edc575c6d06a210d778Adrian Huntervoid mmc_set_bus_width_ddr(struct mmc_host *host, unsigned int width, 71849e3b5a44f8abd33c8693edc575c6d06a210d778Adrian Hunter unsigned int ddr) 7197ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 7207ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.bus_width = width; 72149e3b5a44f8abd33c8693edc575c6d06a210d778Adrian Hunter host->ios.ddr = ddr; 7227ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 7237ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 7247ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 7250f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter/* 7260f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter * Change data bus width of a host. 7270f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter */ 7280f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Huntervoid mmc_set_bus_width(struct mmc_host *host, unsigned int width) 7290f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter{ 73049e3b5a44f8abd33c8693edc575c6d06a210d778Adrian Hunter mmc_set_bus_width_ddr(host, width, MMC_SDR_MODE); 7310f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter} 7320f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter 73386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov/** 73486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number 73586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @vdd: voltage (mV) 73686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @low_bits: prefer low bits in boundary cases 73786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 73886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * This function returns the OCR bit number according to the provided @vdd 73986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * value. If conversion is not possible a negative errno value returned. 74086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 74186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * Depending on the @low_bits flag the function prefers low or high OCR bits 74286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * on boundary voltages. For example, 74386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); 74486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); 74586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 74686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). 74786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov */ 74886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsovstatic int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) 74986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov{ 75086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov const int max_bit = ilog2(MMC_VDD_35_36); 75186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov int bit; 75286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 75386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd < 1650 || vdd > 3600) 75486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return -EINVAL; 75586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 75686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd >= 1650 && vdd <= 1950) 75786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return ilog2(MMC_VDD_165_195); 75886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 75986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (low_bits) 76086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov vdd -= 1; 76186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 76286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Base 2000 mV, step 100 mV, bit's base 8. */ 76386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov bit = (vdd - 2000) / 100 + 8; 76486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (bit > max_bit) 76586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return max_bit; 76686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return bit; 76786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov} 76886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 76986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov/** 77086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask 77186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @vdd_min: minimum voltage value (mV) 77286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @vdd_max: maximum voltage value (mV) 77386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 77486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * This function returns the OCR mask bits according to the provided @vdd_min 77586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * and @vdd_max values. If conversion is not possible the function returns 0. 77686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 77786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * Notes wrt boundary cases: 77886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * This function sets the OCR bits for all boundary voltages, for example 77986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | 78086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * MMC_VDD_34_35 mask. 78186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov */ 78286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsovu32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) 78386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov{ 78486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov u32 mask = 0; 78586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 78686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd_max < vdd_min) 78786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return 0; 78886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 78986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Prefer high bits for the boundary vdd_max values. */ 79086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); 79186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd_max < 0) 79286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return 0; 79386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 79486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Prefer low bits for the boundary vdd_min values. */ 79586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); 79686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd_min < 0) 79786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return 0; 79886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 79986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Fill the mask, from max bit to min bit. */ 80086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov while (vdd_max >= vdd_min) 80186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov mask |= 1 << vdd_max--; 80286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 80386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return mask; 80486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov} 80586e8286a0e48663e1e86a5884b30a6d05de2993aAnton VorontsovEXPORT_SYMBOL(mmc_vddrange_to_ocrmask); 80686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 8075c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell#ifdef CONFIG_REGULATOR 8085c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8095c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell/** 8105c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * mmc_regulator_get_ocrmask - return mask of supported voltages 8115c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * @supply: regulator to use 8125c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * 8135c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * This returns either a negative errno, or a mask of voltages that 8145c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * can be provided to MMC/SD/SDIO devices using the specified voltage 8155c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * regulator. This would normally be called before registering the 8165c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * MMC host adapter. 8175c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 8185c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownellint mmc_regulator_get_ocrmask(struct regulator *supply) 8195c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell{ 8205c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int result = 0; 8215c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int count; 8225c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int i; 8235c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8245c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell count = regulator_count_voltages(supply); 8255c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (count < 0) 8265c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell return count; 8275c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8285c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell for (i = 0; i < count; i++) { 8295c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int vdd_uV; 8305c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int vdd_mV; 8315c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8325c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell vdd_uV = regulator_list_voltage(supply, i); 8335c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (vdd_uV <= 0) 8345c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell continue; 8355c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8365c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell vdd_mV = vdd_uV / 1000; 8375c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); 8385c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } 8395c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8405c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell return result; 8415c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell} 8425c13941acc513669c7d07b28789c3f9ba66ddddfDavid BrownellEXPORT_SYMBOL(mmc_regulator_get_ocrmask); 8435c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8445c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell/** 8455c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * mmc_regulator_set_ocr - set regulator to match host->ios voltage 84699fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij * @mmc: the host to regulate 8475c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * @supply: regulator to use 84899fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij * @vdd_bit: zero for power off, else a bit number (host->ios.vdd) 8495c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * 8505c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * Returns zero on success, else negative errno. 8515c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * 8525c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * MMC host drivers may use this to enable or disable a regulator using 8535c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * a particular supply voltage. This would normally be called from the 8545c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * set_ios() method. 8555c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 85699fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleijint mmc_regulator_set_ocr(struct mmc_host *mmc, 85799fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij struct regulator *supply, 85899fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij unsigned short vdd_bit) 8595c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell{ 8605c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int result = 0; 8615c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int min_uV, max_uV; 8625c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8635c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (vdd_bit) { 8645c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int tmp; 8655c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int voltage; 8665c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8675c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell /* REVISIT mmc_vddrange_to_ocrmask() may have set some 8685c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * bits this regulator doesn't quite support ... don't 8695c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * be too picky, most cards and regulators are OK with 8705c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * a 0.1V range goof (it's a small error percentage). 8715c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 8725c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell tmp = vdd_bit - ilog2(MMC_VDD_165_195); 8735c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (tmp == 0) { 8745c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell min_uV = 1650 * 1000; 8755c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell max_uV = 1950 * 1000; 8765c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } else { 8775c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell min_uV = 1900 * 1000 + tmp * 100 * 1000; 8785c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell max_uV = min_uV + 100 * 1000; 8795c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } 8805c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8815c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell /* avoid needless changes to this voltage; the regulator 8825c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * might not allow this operation 8835c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 8845c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell voltage = regulator_get_voltage(supply); 8855c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (voltage < 0) 8865c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = voltage; 8875c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell else if (voltage < min_uV || voltage > max_uV) 8885c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = regulator_set_voltage(supply, min_uV, max_uV); 8895c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell else 8905c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = 0; 8915c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 89299fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij if (result == 0 && !mmc->regulator_enabled) { 8935c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = regulator_enable(supply); 89499fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij if (!result) 89599fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij mmc->regulator_enabled = true; 89699fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij } 89799fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij } else if (mmc->regulator_enabled) { 8985c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = regulator_disable(supply); 89999fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij if (result == 0) 90099fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij mmc->regulator_enabled = false; 9015c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } 9025c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 90399fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij if (result) 90499fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij dev_err(mmc_dev(mmc), 90599fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij "could not set regulator OCR (%d)\n", result); 9065c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell return result; 9075c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell} 9085c13941acc513669c7d07b28789c3f9ba66ddddfDavid BrownellEXPORT_SYMBOL(mmc_regulator_set_ocr); 9095c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 91099fc5131018cbdc3cf42ce09fb394a4e8b053c74Linus Walleij#endif /* CONFIG_REGULATOR */ 9115c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 9127ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Mask off any voltages we don't support and select 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the lowest voltage 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9167ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanu32 mmc_select_voltage(struct mmc_host *host, u32 ocr) 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int bit; 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ocr &= host->ocr_avail; 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bit = ffs(ocr); 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bit) { 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bit -= 1; 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 92663ef731aa6a81e286de78dcc92241d123424ed39Timo Teras ocr &= 3 << bit; 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.vdd = bit; 929920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 931f6e10b865c3ea56bdaa8c6ecfee313b997900dbbDavid Brownell pr_warning("%s: host doesn't support card's voltages\n", 932f6e10b865c3ea56bdaa8c6ecfee313b997900dbbDavid Brownell mmc_hostname(host)); 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ocr = 0; 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ocr; 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9407ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Select timing parameters for host. 941b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman */ 9427ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_set_timing(struct mmc_host *host, unsigned int timing) 943b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman{ 9447ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.timing = timing; 9457ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 946b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman} 947b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 948b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman/* 94945f8245b972e360c19aec9032e2a2033b8ac3719Russell King * Apply power to the MMC stack. This is a two-stage process. 95045f8245b972e360c19aec9032e2a2033b8ac3719Russell King * First, we enable power to the card without the clock running. 95145f8245b972e360c19aec9032e2a2033b8ac3719Russell King * We then wait a bit for the power to stabilise. Finally, 95245f8245b972e360c19aec9032e2a2033b8ac3719Russell King * enable the bus drivers and clock to the card. 95345f8245b972e360c19aec9032e2a2033b8ac3719Russell King * 95445f8245b972e360c19aec9032e2a2033b8ac3719Russell King * We must _NOT_ enable the clock prior to power stablising. 95545f8245b972e360c19aec9032e2a2033b8ac3719Russell King * 95645f8245b972e360c19aec9032e2a2033b8ac3719Russell King * If a host does all the power sequencing itself, ignore the 95745f8245b972e360c19aec9032e2a2033b8ac3719Russell King * initial MMC_POWER_UP stage. 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_power_up(struct mmc_host *host) 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 961500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao int bit; 962500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao 963500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao /* If ocr is set, we use it */ 964500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao if (host->ocr) 965500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao bit = ffs(host->ocr) - 1; 966500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao else 967500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao bit = fls(host->ocr_avail) - 1; 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.vdd = bit; 970af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (mmc_host_is_spi(host)) { 971af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.chip_select = MMC_CS_HIGH; 972af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; 973af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } else { 974af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.chip_select = MMC_CS_DONTCARE; 975af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; 976af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.power_mode = MMC_POWER_UP; 978f218278a456b3c272b480443c89004c3d2a49f18Pierre Ossman host->ios.bus_width = MMC_BUS_WIDTH_1; 979cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman host->ios.timing = MMC_TIMING_LEGACY; 980920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 982f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman /* 983f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * This delay should be sufficient to allow the power supply 984f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * to reach the minimum voltage. 985f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman */ 98679bccc5aefb4e64e651abe04f78c3e6bf8acd6f0José M. Fernández mmc_delay(10); 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 98888ae8b866488031b0e2fc05a27440fefec5e6927Hein Tibosch host->ios.clock = host->f_init; 9898dfd0374be84793360db7fff2e635d2cd3bbcb21Sascha Hauer 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.power_mode = MMC_POWER_ON; 991920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 993f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman /* 994f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * This delay must be at least 74 clock sizes, or 1 ms, or the 995f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * time required to reach a stable voltage. 996f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman */ 99779bccc5aefb4e64e651abe04f78c3e6bf8acd6f0José M. Fernández mmc_delay(10); 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_power_off(struct mmc_host *host) 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.clock = 0; 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.vdd = 0; 1004af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (!mmc_host_is_spi(host)) { 1005af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; 1006af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.chip_select = MMC_CS_DONTCARE; 1007af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.power_mode = MMC_POWER_OFF; 1009f218278a456b3c272b480443c89004c3d2a49f18Pierre Ossman host->ios.bus_width = MMC_BUS_WIDTH_1; 1010cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman host->ios.timing = MMC_TIMING_LEGACY; 1011920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1015393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * Cleanup when the last reference to the bus operator is dropped. 1016393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk */ 1017261172fd1b23769bc7632047e2cb826c9b8b1a50Adrian Bunkstatic void __mmc_release_bus(struct mmc_host *host) 1018393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk{ 1019393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk BUG_ON(!host); 1020393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk BUG_ON(host->bus_refs); 1021393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk BUG_ON(!host->bus_dead); 1022393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1023393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk host->bus_ops = NULL; 1024393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk} 1025393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1026393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk/* 1027393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * Increase reference count of bus operator 1028393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk */ 1029393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunkstatic inline void mmc_bus_get(struct mmc_host *host) 1030393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk{ 1031393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk unsigned long flags; 1032393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1033393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_lock_irqsave(&host->lock, flags); 1034393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk host->bus_refs++; 1035393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_unlock_irqrestore(&host->lock, flags); 1036393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk} 1037393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1038393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk/* 1039393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * Decrease reference count of bus operator and free it if 1040393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * it is the last reference. 1041393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk */ 1042393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunkstatic inline void mmc_bus_put(struct mmc_host *host) 1043393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk{ 1044393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk unsigned long flags; 1045393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1046393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_lock_irqsave(&host->lock, flags); 1047393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk host->bus_refs--; 1048393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk if ((host->bus_refs == 0) && host->bus_ops) 1049393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk __mmc_release_bus(host); 1050393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_unlock_irqrestore(&host->lock, flags); 1051393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk} 1052393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 1053393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk/* 10547ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Assign a mmc bus handler to a host. Only one bus handler may control a 10557ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * host at any given time. 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10577ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10597ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman unsigned long flags; 1060e45a1bd20fa5b920901879e85cdf5eda21f78d7cPhilip Langdale 10617ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(!host); 10627ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(!ops); 1063b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman 1064d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 1065bce40a36de574376f41f1ff3c4d212a7da2a3c90Philip Langdale 10667ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_lock_irqsave(&host->lock, flags); 1067bce40a36de574376f41f1ff3c4d212a7da2a3c90Philip Langdale 10687ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(host->bus_ops); 10697ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(host->bus_refs); 1070b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 10717ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_ops = ops; 10727ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_refs = 1; 10737ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_dead = 0; 1074b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 10757ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_unlock_irqrestore(&host->lock, flags); 1076b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman} 1077b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 10787ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 10797ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Remove the current bus handler from a host. Assumes that there are 10807ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * no interesting cards left, so the bus is powered down. 10817ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 10827ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_detach_bus(struct mmc_host *host) 10837ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman{ 10847ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman unsigned long flags; 10857ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 10867ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(!host); 10877ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 1088d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 1089d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->bus_ops); 1090cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman 10917ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_lock_irqsave(&host->lock, flags); 10927ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 10937ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_dead = 1; 10947ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 10957ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_unlock_irqrestore(&host->lock, flags); 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10977ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_power_off(host); 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10997ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_detect_change - process change of state on a MMC socket 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: host which changed state. 11058dc003359cc3996abad9e53a7b2280b272610283Richard Purdie * @delay: optional delay to wait before detection (jiffies) 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 110767a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * MMC drivers should call this when they detect a card has been 110867a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * inserted or removed. The MMC layer will confirm that any 110967a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * present card is still functional, and initialize any newly 111067a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * inserted. 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11128dc003359cc3996abad9e53a7b2280b272610283Richard Purdievoid mmc_detect_change(struct mmc_host *host, unsigned long delay) 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11143b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#ifdef CONFIG_MMC_DEBUG 11151efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman unsigned long flags; 111601f41ec7b36e14da18a4e162ef697ae358f36e37Andrew Morton spin_lock_irqsave(&host->lock, flags); 1117d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(host->removed); 111801f41ec7b36e14da18a4e162ef697ae358f36e37Andrew Morton spin_unlock_irqrestore(&host->lock, flags); 11193b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#endif 11203b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman 1121c4028958b6ecad064b1a6303a6a5906d4fe48d73David Howells mmc_schedule_delayed_work(&host->detect, delay); 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_detect_change); 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1126dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Huntervoid mmc_init_erase(struct mmc_card *card) 1127dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1128dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int sz; 1129dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1130dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (is_power_of_2(card->erase_size)) 1131dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->erase_shift = ffs(card->erase_size) - 1; 1132dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1133dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->erase_shift = 0; 1134dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1135dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1136dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * It is possible to erase an arbitrarily large area of an SD or MMC 1137dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * card. That is not desirable because it can take a long time 1138dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * (minutes) potentially delaying more important I/O, and also the 1139dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * timeout calculations become increasingly hugely over-estimated. 1140dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Consequently, 'pref_erase' is defined as a guide to limit erases 1141dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * to that size and alignment. 1142dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * 1143dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * For SD cards that define Allocation Unit size, limit erases to one 1144dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Allocation Unit at a time. For MMC cards that define High Capacity 1145dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Erase Size, whether it is switched on or not, limit to that size. 1146dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Otherwise just have a stab at a good value. For modern cards it 1147dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * will end up being 4MiB. Note that if the value is too small, it 1148dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * can end up taking longer to erase. 1149dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1150dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card) && card->ssr.au) { 1151dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = card->ssr.au; 1152dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->erase_shift = ffs(card->ssr.au) - 1; 1153dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else if (card->ext_csd.hc_erase_size) { 1154dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = card->ext_csd.hc_erase_size; 1155dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else { 1156dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; 1157dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (sz < 128) 1158dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = 512 * 1024 / 512; 1159dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else if (sz < 512) 1160dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = 1024 * 1024 / 512; 1161dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else if (sz < 1024) 1162dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = 2 * 1024 * 1024 / 512; 1163dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1164dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = 4 * 1024 * 1024 / 512; 1165dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->pref_erase < card->erase_size) 1166dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase = card->erase_size; 1167dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else { 1168dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter sz = card->pref_erase % card->erase_size; 1169dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (sz) 1170dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->pref_erase += card->erase_size - sz; 1171dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1172dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1173dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1174dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1175dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterstatic void mmc_set_mmc_erase_timeout(struct mmc_card *card, 1176dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter struct mmc_command *cmd, 1177dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int arg, unsigned int qty) 1178dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1179dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int erase_timeout; 1180dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1181dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->ext_csd.erase_group_def & 1) { 1182dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* High Capacity Erase Group Size uses HC timeouts */ 1183dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg == MMC_TRIM_ARG) 1184dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = card->ext_csd.trim_timeout; 1185dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1186dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = card->ext_csd.hc_erase_timeout; 1187dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else { 1188dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* CSD Erase Group Size uses write timeout */ 1189dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int mult = (10 << card->csd.r2w_factor); 1190dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int timeout_clks = card->csd.tacc_clks * mult; 1191dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int timeout_us; 1192dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1193dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */ 1194dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->csd.tacc_ns < 1000000) 1195dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter timeout_us = (card->csd.tacc_ns * mult) / 1000; 1196dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1197dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter timeout_us = (card->csd.tacc_ns / 1000) * mult; 1198dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1199dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1200dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * ios.clock is only a target. The real clock rate might be 1201dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * less but not that much less, so fudge it by multiplying by 2. 1202dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1203dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter timeout_clks <<= 1; 1204dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter timeout_us += (timeout_clks * 1000) / 1205dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter (card->host->ios.clock / 1000); 1206dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1207dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = timeout_us / 1000; 1208dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1209dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1210dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Theoretically, the calculation could underflow so round up 1211dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * to 1ms in that case. 1212dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1213dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!erase_timeout) 1214dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = 1; 1215dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1216dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1217dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Multiplier for secure operations */ 1218dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg & MMC_SECURE_ARGS) { 1219dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg == MMC_SECURE_ERASE_ARG) 1220dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout *= card->ext_csd.sec_erase_mult; 1221dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1222dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout *= card->ext_csd.sec_trim_mult; 1223dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1224dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1225dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout *= qty; 1226dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1227dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1228dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Ensure at least a 1 second timeout for SPI as per 1229dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * 'mmc_set_data_timeout()' 1230dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1231dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_host_is_spi(card->host) && erase_timeout < 1000) 1232dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter erase_timeout = 1000; 1233dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1234dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd->erase_timeout = erase_timeout; 1235dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1236dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1237dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterstatic void mmc_set_sd_erase_timeout(struct mmc_card *card, 1238dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter struct mmc_command *cmd, unsigned int arg, 1239dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int qty) 1240dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1241dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->ssr.erase_timeout) { 1242dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Erase timeout specified in SD Status Register (SSR) */ 1243dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd->erase_timeout = card->ssr.erase_timeout * qty + 1244dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->ssr.erase_offset; 1245dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else { 1246dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1247dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Erase timeout not specified in SD Status Register (SSR) so 1248dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * use 250ms per write block. 1249dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1250dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd->erase_timeout = 250 * qty; 1251dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1252dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1253dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Must not be less than 1 second */ 1254dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (cmd->erase_timeout < 1000) 1255dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd->erase_timeout = 1000; 1256dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1257dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1258dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterstatic void mmc_set_erase_timeout(struct mmc_card *card, 1259dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter struct mmc_command *cmd, unsigned int arg, 1260dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int qty) 1261dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1262dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card)) 1263dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter mmc_set_sd_erase_timeout(card, cmd, arg, qty); 1264dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1265dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter mmc_set_mmc_erase_timeout(card, cmd, arg, qty); 1266dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1267dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1268dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterstatic int mmc_do_erase(struct mmc_card *card, unsigned int from, 1269dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int to, unsigned int arg) 1270dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1271dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter struct mmc_command cmd; 1272dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int qty = 0; 1273dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter int err; 1274dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1275dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 1276dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * qty is used to calculate the erase timeout which depends on how many 1277dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * erase groups (or allocation units in SD terminology) are affected. 1278dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * We count erasing part of an erase group as one erase group. 1279dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * For SD, the allocation units are always a power of 2. For MMC, the 1280dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * erase group size is almost certainly also power of 2, but it does not 1281dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * seem to insist on that in the JEDEC standard, so we fall back to 1282dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * division in that case. SD may not specify an allocation unit size, 1283dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * in which case the timeout is based on the number of write blocks. 1284dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * 1285dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Note that the timeout for secure trim 2 will only be correct if the 1286dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * number of erase groups specified is the same as the total of all 1287dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * preceding secure trim 1 commands. Since the power may have been 1288dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * lost since the secure trim 1 commands occurred, it is generally 1289dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * impossible to calculate the secure trim 2 timeout correctly. 1290dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1291dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->erase_shift) 1292dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter qty += ((to >> card->erase_shift) - 1293dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter (from >> card->erase_shift)) + 1; 1294dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else if (mmc_card_sd(card)) 1295dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter qty += to - from + 1; 1296dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1297dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter qty += ((to / card->erase_size) - 1298dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter (from / card->erase_size)) + 1; 1299dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1300dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!mmc_card_blockaddr(card)) { 1301dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter from <<= 9; 1302dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter to <<= 9; 1303dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1304dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1305dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter memset(&cmd, 0, sizeof(struct mmc_command)); 1306dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card)) 1307dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = SD_ERASE_WR_BLK_START; 1308dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1309dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = MMC_ERASE_GROUP_START; 1310dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.arg = from; 1311dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; 1312dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_wait_for_cmd(card->host, &cmd, 0); 1313dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err) { 1314dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_ERR "mmc_erase: group start error %d, " 1315dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter "status %#x\n", err, cmd.resp[0]); 1316dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = -EINVAL; 1317dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1318dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1319dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1320dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter memset(&cmd, 0, sizeof(struct mmc_command)); 1321dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card)) 1322dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = SD_ERASE_WR_BLK_END; 1323dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1324dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = MMC_ERASE_GROUP_END; 1325dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.arg = to; 1326dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; 1327dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_wait_for_cmd(card->host, &cmd, 0); 1328dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err) { 1329dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_ERR "mmc_erase: group end error %d, status %#x\n", 1330dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err, cmd.resp[0]); 1331dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = -EINVAL; 1332dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1333dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1334dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1335dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter memset(&cmd, 0, sizeof(struct mmc_command)); 1336dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = MMC_ERASE; 1337dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.arg = arg; 1338dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; 1339dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter mmc_set_erase_timeout(card, &cmd, arg, qty); 1340dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_wait_for_cmd(card->host, &cmd, 0); 1341dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err) { 1342dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_ERR "mmc_erase: erase error %d, status %#x\n", 1343dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err, cmd.resp[0]); 1344dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = -EIO; 1345dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1346dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1347dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1348dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_host_is_spi(card->host)) 1349dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1350dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1351dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter do { 1352dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter memset(&cmd, 0, sizeof(struct mmc_command)); 1353dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.opcode = MMC_SEND_STATUS; 1354dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.arg = card->rca << 16; 1355dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 1356dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Do not retry else we can't see errors */ 1357dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_wait_for_cmd(card->host, &cmd, 0); 1358dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err || (cmd.resp[0] & 0xFDF92000)) { 1359dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_ERR "error %d requesting status %#x\n", 1360dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err, cmd.resp[0]); 1361dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = -EIO; 1362dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 1363dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1364dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || 1365dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter R1_CURRENT_STATE(cmd.resp[0]) == 7); 1366dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterout: 1367dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return err; 1368dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1369dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1370dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter/** 1371dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * mmc_erase - erase sectors. 1372dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * @card: card to erase 1373dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * @from: first sector to erase 1374dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * @nr: number of sectors to erase 1375dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * @arg: erase command argument (SD supports only %MMC_ERASE_ARG) 1376dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * 1377dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Caller must claim host before calling this function. 1378dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 1379dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, 1380dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int arg) 1381dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1382dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int rem, to = from + nr; 1383dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1384dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!(card->host->caps & MMC_CAP_ERASE) || 1385dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter !(card->csd.cmdclass & CCC_ERASE)) 1386dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1387dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1388dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!card->erase_size) 1389dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1390dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1391dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (mmc_card_sd(card) && arg != MMC_ERASE_ARG) 1392dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1393dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1394dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if ((arg & MMC_SECURE_ARGS) && 1395dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) 1396dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1397dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1398dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if ((arg & MMC_TRIM_ARGS) && 1399dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) 1400dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EOPNOTSUPP; 1401dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1402dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg == MMC_SECURE_ERASE_ARG) { 1403dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (from % card->erase_size || nr % card->erase_size) 1404dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EINVAL; 1405dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1406dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1407dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (arg == MMC_ERASE_ARG) { 1408dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter rem = from % card->erase_size; 1409dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (rem) { 1410dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter rem = card->erase_size - rem; 1411dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter from += rem; 1412dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (nr > rem) 1413dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter nr -= rem; 1414dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 1415dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1416dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1417dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter rem = nr % card->erase_size; 1418dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (rem) 1419dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter nr -= rem; 1420dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1421dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1422dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (nr == 0) 1423dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1424dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1425dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter to = from + nr; 1426dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1427dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (to <= from) 1428dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -EINVAL; 1429dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1430dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 'from' and 'to' are inclusive */ 1431dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter to -= 1; 1432dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1433dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return mmc_do_erase(card, from, to, arg); 1434dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1435dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_erase); 1436dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1437dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_can_erase(struct mmc_card *card) 1438dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1439dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if ((card->host->caps & MMC_CAP_ERASE) && 1440dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter (card->csd.cmdclass & CCC_ERASE) && card->erase_size) 1441dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 1; 1442dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1443dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1444dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_can_erase); 1445dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1446dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_can_trim(struct mmc_card *card) 1447dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1448dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) 1449dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 1; 1450dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1451dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1452dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_can_trim); 1453dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1454dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_can_secure_erase_trim(struct mmc_card *card) 1455dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1456dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) 1457dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 1; 1458dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1459dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1460dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_can_secure_erase_trim); 1461dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 1462dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterint mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, 1463dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int nr) 1464dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 1465dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!card->erase_size) 1466dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1467dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (from % card->erase_size || nr % card->erase_size) 1468dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 1469dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 1; 1470dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 1471dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterEXPORT_SYMBOL(mmc_erase_group_aligned); 14721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14730f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunterint mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) 14740f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter{ 14750f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter struct mmc_command cmd; 14760f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter 14770f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter if (mmc_card_blockaddr(card) || mmc_card_ddr_mode(card)) 14780f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter return 0; 14790f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter 14800f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter memset(&cmd, 0, sizeof(struct mmc_command)); 14810f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter cmd.opcode = MMC_SET_BLOCKLEN; 14820f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter cmd.arg = blocklen; 14830f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; 14840f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter return mmc_wait_for_cmd(card->host, &cmd, 5); 14850f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter} 14860f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian HunterEXPORT_SYMBOL(mmc_set_blocklen); 14870f8d8ea64ec7c77ca5beb59534d386fe0235961aAdrian Hunter 1488807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Rossstatic int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) 1489807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross{ 1490807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross host->f_init = freq; 1491807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1492807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross#ifdef CONFIG_MMC_DEBUG 1493807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross pr_info("%s: %s: trying to init card at %u Hz\n", 1494807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_hostname(host), __func__, host->f_init); 1495807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross#endif 1496807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_power_up(host); 14972f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity 14982f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity /* 14992f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity * sdio_reset sends CMD52 to reset card. Since we do not know 15002f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity * if the card is being re-initialized, just send it. CMD52 15012f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity * should be ignored by SD/eMMC cards. 15022f94e55ae5ddad83e661002985d2ea11b6d51d3dPhilip Rakity */ 1503807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross sdio_reset(host); 1504807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_go_idle(host); 1505807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1506807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_send_if_cond(host, host->ocr_avail); 1507807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1508807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross /* Order's important: probe SDIO, then SD, then MMC */ 1509807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (!mmc_attach_sdio(host)) 1510807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross return 0; 1511807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (!mmc_attach_sd(host)) 1512807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross return 0; 1513807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (!mmc_attach_mmc(host)) 1514807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross return 0; 1515807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1516807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_power_off(host); 1517807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross return -EIO; 1518807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross} 1519807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1520b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossmanvoid mmc_rescan(struct work_struct *work) 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1522807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; 1523c4028958b6ecad064b1a6303a6a5906d4fe48d73David Howells struct mmc_host *host = 1524c4028958b6ecad064b1a6303a6a5906d4fe48d73David Howells container_of(work, struct mmc_host, detect.work); 152588ae8b866488031b0e2fc05a27440fefec5e6927Hein Tibosch int i; 15264c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 1527807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (host->rescan_disable) 15284c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky return; 15291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15307ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_get(host); 1531b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman 153230201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen /* 153330201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen * if there is a _removable_ card registered, check whether it is 153430201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen * still present 153530201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen */ 153630201e7f3ac639fe98fcd25d40346b65dde9ecbaOhad Ben-Cohen if (host->bus_ops && host->bus_ops->detect && !host->bus_dead 1537bad3babace2ee4d1763b4016a662a5c660ab92e9Ohad Ben-Cohen && !(host->caps & MMC_CAP_NONREMOVABLE)) 153894d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer host->bus_ops->detect(host); 153994d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer 1540c584179828b268152f5ff82dab529a2c095b09acChris Ball /* 1541c584179828b268152f5ff82dab529a2c095b09acChris Ball * Let mmc_bus_put() free the bus/bus_ops if we've found that 1542c584179828b268152f5ff82dab529a2c095b09acChris Ball * the card is no longer present. 1543c584179828b268152f5ff82dab529a2c095b09acChris Ball */ 154494d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_bus_put(host); 154594d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_bus_get(host); 154694d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer 154794d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer /* if there still is a card present, stop here */ 154894d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (host->bus_ops != NULL) { 15497ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 155094d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer goto out; 155194d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer } 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 155394d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer /* 155494d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer * Only we can add a new handler, so it's safe to 155594d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer * release the lock here. 155694d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer */ 155794d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_bus_put(host); 15581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 155994d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (host->ops->get_cd && host->ops->get_cd(host) == 0) 156094d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer goto out; 15611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1562807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_claim_host(host); 156388ae8b866488031b0e2fc05a27440fefec5e6927Hein Tibosch for (i = 0; i < ARRAY_SIZE(freqs); i++) { 1564807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) 1565807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross break; 1566807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross if (freqs[i] < host->f_min) 1567807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross break; 156888ae8b866488031b0e2fc05a27440fefec5e6927Hein Tibosch } 1569807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross mmc_release_host(host); 1570807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross 1571807e8e40673d9628fa7dcdd14423424b4ee5f43bAndy Ross out: 157228f52482b41edc88cdf575aa6ed414c6e116ce10Anton Vorontsov if (host->caps & MMC_CAP_NEEDS_POLL) 157328f52482b41edc88cdf575aa6ed414c6e116ce10Anton Vorontsov mmc_schedule_delayed_work(&host->detect, HZ); 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1576b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossmanvoid mmc_start_host(struct mmc_host *host) 15771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1578b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossman mmc_power_off(host); 1579b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossman mmc_detect_change(host, 0); 15801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1582b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossmanvoid mmc_stop_host(struct mmc_host *host) 15831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15843b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#ifdef CONFIG_MMC_DEBUG 15851efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman unsigned long flags; 15861efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman spin_lock_irqsave(&host->lock, flags); 15873b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman host->removed = 1; 15881efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman spin_unlock_irqrestore(&host->lock, flags); 15893b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#endif 15903b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman 15918ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->caps & MMC_CAP_DISABLE) 15928ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter cancel_delayed_work(&host->disable); 1593d9bcbf343ec63e1104b5276195888ee06b4d086fGuennadi Liakhovetski cancel_delayed_work_sync(&host->detect); 15943b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman mmc_flush_scheduled_work(); 15953b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman 1596da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre /* clear pm flags now and let card drivers set them as needed */ 1597da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre host->pm_flags = 0; 1598da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre 15997ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_get(host); 16007ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (host->bus_ops && !host->bus_dead) { 16017ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (host->bus_ops->remove) 16027ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_ops->remove(host); 16037ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 16047ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_claim_host(host); 16057ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_detach_bus(host); 16067ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_release_host(host); 160753509f0fe28e049e772897aa8fa1f5183b6823a2Denis Karpov mmc_bus_put(host); 160853509f0fe28e049e772897aa8fa1f5183b6823a2Denis Karpov return; 16091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16107ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 16117ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 16127ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(host->card); 16131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_power_off(host); 16151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 161712ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohenint mmc_power_save_host(struct mmc_host *host) 1618eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter{ 161912ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen int ret = 0; 162012ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen 1621eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_get(host); 1622eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1623eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) { 1624eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_put(host); 162512ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen return -EINVAL; 1626eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter } 1627eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1628eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter if (host->bus_ops->power_save) 162912ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen ret = host->bus_ops->power_save(host); 1630eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1631eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_put(host); 1632eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1633eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_power_off(host); 163412ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen 163512ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen return ret; 1636eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter} 1637eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian HunterEXPORT_SYMBOL(mmc_power_save_host); 1638eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 163912ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohenint mmc_power_restore_host(struct mmc_host *host) 1640eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter{ 164112ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen int ret; 164212ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen 1643eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_get(host); 1644eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1645eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) { 1646eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_put(host); 164712ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen return -EINVAL; 1648eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter } 1649eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1650eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_power_up(host); 165112ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen ret = host->bus_ops->power_restore(host); 1652eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1653eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_bus_put(host); 165412ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen 165512ae637f081a7a05144af65802a7b492b9162660Ohad Ben-Cohen return ret; 1656eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter} 1657eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian HunterEXPORT_SYMBOL(mmc_power_restore_host); 1658eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 1659b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinenint mmc_card_awake(struct mmc_host *host) 1660b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen{ 1661b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen int err = -ENOSYS; 1662b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1663b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen mmc_bus_get(host); 1664b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1665b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen if (host->bus_ops && !host->bus_dead && host->bus_ops->awake) 1666b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen err = host->bus_ops->awake(host); 1667b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1668b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen mmc_bus_put(host); 1669b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1670b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen return err; 1671b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen} 1672b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko LavinenEXPORT_SYMBOL(mmc_card_awake); 1673b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1674b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinenint mmc_card_sleep(struct mmc_host *host) 1675b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen{ 1676b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen int err = -ENOSYS; 1677b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1678b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen mmc_bus_get(host); 1679b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1680b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen if (host->bus_ops && !host->bus_dead && host->bus_ops->awake) 1681b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen err = host->bus_ops->sleep(host); 1682b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1683b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen mmc_bus_put(host); 1684b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1685b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen return err; 1686b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen} 1687b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko LavinenEXPORT_SYMBOL(mmc_card_sleep); 1688b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1689b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinenint mmc_card_can_sleep(struct mmc_host *host) 1690b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen{ 1691b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen struct mmc_card *card = host->card; 1692b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 1693b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen if (card && mmc_card_mmc(card) && card->ext_csd.rev >= 3) 1694b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen return 1; 1695b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen return 0; 1696b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen} 1697b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko LavinenEXPORT_SYMBOL(mmc_card_can_sleep); 1698b1ebe38456f7fe61a88af2844361e763ac6ea5aeJarkko Lavinen 16991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_PM 17001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_suspend_host - suspend a host 17031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host 17041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17051a13f8fa76c880be41d6b1e6a2b44404bcbfdf9eMatt Flemingint mmc_suspend_host(struct mmc_host *host) 17061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 170795cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre int err = 0; 170895cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre 17098ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->caps & MMC_CAP_DISABLE) 17108ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter cancel_delayed_work(&host->disable); 17117de427d088a967d2173739e21e744921d5496a8bJorg Schummer cancel_delayed_work(&host->detect); 1712b5af25bee2de2f6cd1ac74ba737cbc4f3d303e5dPierre Ossman mmc_flush_scheduled_work(); 1713b5af25bee2de2f6cd1ac74ba737cbc4f3d303e5dPierre Ossman 17147ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_get(host); 17157ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (host->bus_ops && !host->bus_dead) { 17166abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (host->bus_ops->suspend) 171795cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre err = host->bus_ops->suspend(host); 17181c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen if (err == -ENOSYS || !host->bus_ops->resume) { 17191c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen /* 17201c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen * We simply "remove" the card in this case. 17211c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen * It will be redetected on resume. 17221c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen */ 17231c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen if (host->bus_ops->remove) 17241c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen host->bus_ops->remove(host); 17251c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen mmc_claim_host(host); 17261c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen mmc_detach_bus(host); 17271c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen mmc_release_host(host); 17281c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen host->pm_flags = 0; 17291c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen err = 0; 17301c8cf9c997a4a6b36e907c7ede5f048aeaab1644Ohad Ben-Cohen } 1731b5af25bee2de2f6cd1ac74ba737cbc4f3d303e5dPierre Ossman } 17327ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 17337ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1734da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre if (!err && !(host->pm_flags & MMC_PM_KEEP_POWER)) 173595cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre mmc_power_off(host); 17361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 173795cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre return err; 17381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_suspend_host); 17411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_resume_host - resume a previously suspended host 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint mmc_resume_host(struct mmc_host *host) 17471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 174895cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre int err = 0; 174995cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre 17506abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_bus_get(host); 17516abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (host->bus_ops && !host->bus_dead) { 1752da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre if (!(host->pm_flags & MMC_PM_KEEP_POWER)) { 1753da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre mmc_power_up(host); 1754da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre mmc_select_voltage(host, host->ocr); 1755e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen /* 1756e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen * Tell runtime PM core we just powered up the card, 1757e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen * since it still believes the card is powered off. 1758e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen * Note that currently runtime PM is only enabled 1759e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen * for SDIO cards that are MMC_CAP_POWER_OFF_CARD 1760e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen */ 1761e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen if (mmc_card_sdio(host->card) && 1762e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen (host->caps & MMC_CAP_POWER_OFF_CARD)) { 1763e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen pm_runtime_disable(&host->card->dev); 1764e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen pm_runtime_set_active(&host->card->dev); 1765e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen pm_runtime_enable(&host->card->dev); 1766e594573d790bd7e269f05955d316b88f7be0c14aOhad Ben-Cohen } 1767da68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6Nicolas Pitre } 17686abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman BUG_ON(!host->bus_ops->resume); 176995cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre err = host->bus_ops->resume(host); 177095cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre if (err) { 177195cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre printk(KERN_WARNING "%s: error %d during resume " 177295cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre "(card was removed?)\n", 177395cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre mmc_hostname(host), err); 177495cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre err = 0; 177595cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre } 17766abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman } 17776abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_bus_put(host); 17786abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 177995cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre return err; 17801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_resume_host); 17821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17834c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky/* Do the card removal on suspend if card is assumed removeable 17844c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky * Do that in pm notifier while userspace isn't yet frozen, so we will be able 17854c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky to sync the card. 17864c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky*/ 17874c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitskyint mmc_pm_notify(struct notifier_block *notify_block, 17884c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky unsigned long mode, void *unused) 17894c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky{ 17904c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky struct mmc_host *host = container_of( 17914c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky notify_block, struct mmc_host, pm_notify); 17924c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky unsigned long flags; 17934c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 17944c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 17954c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky switch (mode) { 17964c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky case PM_HIBERNATION_PREPARE: 17974c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky case PM_SUSPEND_PREPARE: 17984c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 17994c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky spin_lock_irqsave(&host->lock, flags); 18004c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky host->rescan_disable = 1; 18014c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky spin_unlock_irqrestore(&host->lock, flags); 18024c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky cancel_delayed_work_sync(&host->detect); 18034c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18044c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky if (!host->bus_ops || host->bus_ops->suspend) 18054c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky break; 18064c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18074c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky mmc_claim_host(host); 18084c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18094c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky if (host->bus_ops->remove) 18104c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky host->bus_ops->remove(host); 18114c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18124c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky mmc_detach_bus(host); 18134c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky mmc_release_host(host); 18144c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky host->pm_flags = 0; 18154c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky break; 18164c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18174c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky case PM_POST_SUSPEND: 18184c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky case PM_POST_HIBERNATION: 1819274476f8fe0b6ac9bac542cc39de12c3dd0f43f6Takashi Iwai case PM_POST_RESTORE: 18204c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18214c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky spin_lock_irqsave(&host->lock, flags); 18224c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky host->rescan_disable = 0; 18234c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky spin_unlock_irqrestore(&host->lock, flags); 18244c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky mmc_detect_change(host, 0); 18254c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18264c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky } 18274c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky 18284c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky return 0; 18294c2ef25fe0b847d2ae818f74758ddb0be1c27d8eMaxim Levitsky} 18301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 18311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1832ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic int __init mmc_init(void) 1833ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 1834ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman int ret; 1835ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 18360d9ee5b2e9aac981fa063339daf04320eac610d1Tejun Heo workqueue = alloc_ordered_workqueue("kmmcd", 0); 1837ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman if (!workqueue) 1838ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman return -ENOMEM; 1839ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 1840ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman ret = mmc_register_bus(); 1841e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman if (ret) 1842e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman goto destroy_workqueue; 1843e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1844e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman ret = mmc_register_host_class(); 1845e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman if (ret) 1846e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman goto unregister_bus; 1847e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1848e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman ret = sdio_register_bus(); 1849e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman if (ret) 1850e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman goto unregister_host_class; 1851e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1852e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman return 0; 1853e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1854e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossmanunregister_host_class: 1855e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman mmc_unregister_host_class(); 1856e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossmanunregister_bus: 1857e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman mmc_unregister_bus(); 1858e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossmandestroy_workqueue: 1859e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman destroy_workqueue(workqueue); 1860e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1861ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman return ret; 1862ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 1863ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 1864ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic void __exit mmc_exit(void) 1865ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 1866e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman sdio_unregister_bus(); 1867ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman mmc_unregister_host_class(); 1868ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman mmc_unregister_bus(); 1869ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman destroy_workqueue(workqueue); 1870ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 1871ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 187226074962e8f547b96614dbe248748ba2a1996ca3Nicolas Pitresubsys_initcall(mmc_init); 1873ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanmodule_exit(mmc_exit); 1874ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 18751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 1876