core.c revision 319a3f1429c91147058ac26c5f5bac8ec1730bc6
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> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mmc/card.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mmc/host.h> 28da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include <linux/mmc/mmc.h> 29da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include <linux/mmc/sd.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31aaac1b470bd0dccb30912356617069dc6199cc80Pierre Ossman#include "core.h" 32ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman#include "bus.h" 33ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman#include "host.h" 34e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman#include "sdio_bus.h" 35da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman 36da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include "mmc_ops.h" 37da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include "sd_ops.h" 385c4e6f1301649d5b29dd0f70e6da83e728ab5ca5Pierre Ossman#include "sdio_ops.h" 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic struct workqueue_struct *workqueue; 41ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 42ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman/* 43af51715079e7fb6b290e1881d63d815dc4de5011David Brownell * Enabling software CRCs on the data blocks can be a significant (30%) 44af51715079e7fb6b290e1881d63d815dc4de5011David Brownell * performance cost, and for other reasons may not always be desired. 45af51715079e7fb6b290e1881d63d815dc4de5011David Brownell * So we allow it it to be disabled. 46af51715079e7fb6b290e1881d63d815dc4de5011David Brownell */ 47af51715079e7fb6b290e1881d63d815dc4de5011David Brownellint use_spi_crc = 1; 48af51715079e7fb6b290e1881d63d815dc4de5011David Brownellmodule_param(use_spi_crc, bool, 0); 49af51715079e7fb6b290e1881d63d815dc4de5011David Brownell 50af51715079e7fb6b290e1881d63d815dc4de5011David Brownell/* 51ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman * Internal function. Schedule delayed work in the MMC work queue. 52ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman */ 53ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic int mmc_schedule_delayed_work(struct delayed_work *work, 54ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman unsigned long delay) 55ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 56ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman return queue_delayed_work(workqueue, work, delay); 57ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 58ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 59ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman/* 60ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman * Internal function. Flush all scheduled work from the MMC work queue. 61ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman */ 62ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic void mmc_flush_scheduled_work(void) 63ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 64ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman flush_workqueue(workqueue); 65ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 66ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 68fe10c6abea8bc83291a13e0580b3e4c355710b09Russell King * mmc_request_done - finish processing an MMC request 69fe10c6abea8bc83291a13e0580b3e4c355710b09Russell King * @host: MMC host which completed request 70fe10c6abea8bc83291a13e0580b3e4c355710b09Russell King * @mrq: MMC request which request 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MMC drivers should call this function when they have completed 73fe10c6abea8bc83291a13e0580b3e4c355710b09Russell King * their processing of a request. 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_command *cmd = mrq->cmd; 78920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King int err = cmd->error; 79920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King 80af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (err && cmd->retries && mmc_host_is_spi(host)) { 81af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) 82af51715079e7fb6b290e1881d63d815dc4de5011David Brownell cmd->retries = 0; 83af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } 84af51715079e7fb6b290e1881d63d815dc4de5011David Brownell 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err && cmd->retries) { 86e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: req failed (CMD%u): %d, retrying...\n", 87e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), cmd->opcode, err); 88e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->retries--; 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->error = 0; 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ops->request(host, mrq); 92e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } else { 93af8350c756cb48a738474738f7bf8c0e572fa057Pierre Ossman led_trigger_event(host->led, LED_OFF); 94af8350c756cb48a738474738f7bf8c0e572fa057Pierre Ossman 95e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", 96e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), cmd->opcode, err, 97e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman cmd->resp[0], cmd->resp[1], 98e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman cmd->resp[2], cmd->resp[3]); 99e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 100e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->data) { 101e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: %d bytes transferred: %d\n", 102e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), 103e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->data->bytes_xfered, mrq->data->error); 104e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } 105e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 106e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->stop) { 107e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n", 108e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), mrq->stop->opcode, 109e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->stop->error, 110e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->stop->resp[0], mrq->stop->resp[1], 111e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->stop->resp[2], mrq->stop->resp[3]); 112e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } 113e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 114e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->done) 115e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->done(mrq); 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_request_done); 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 121393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunkstatic void 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmmc_start_request(struct mmc_host *host, struct mmc_request *mrq) 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 124976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman#ifdef CONFIG_MMC_DEBUG 125976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman unsigned int i, sz; 126a84756c5735f28bf000617f18734a9e94426386aPierre Ossman struct scatterlist *sg; 127976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman#endif 128976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman 129920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King pr_debug("%s: starting CMD%u arg %08x flags %08x\n", 130920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_hostname(host), mrq->cmd->opcode, 131920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mrq->cmd->arg, mrq->cmd->flags); 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 133e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->data) { 134e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: blksz %d blocks %d flags %08x " 135e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman "tsac %d ms nsac %d\n", 136e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), mrq->data->blksz, 137e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->data->blocks, mrq->data->flags, 138ce252edd869ba1fee6a9a6f83e20f349d4c4d669Pierre Ossman mrq->data->timeout_ns / 1000000, 139e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->data->timeout_clks); 140e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } 141e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 142e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman if (mrq->stop) { 143e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman pr_debug("%s: CMD%u arg %08x flags %08x\n", 144e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mmc_hostname(host), mrq->stop->opcode, 145e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman mrq->stop->arg, mrq->stop->flags); 146e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman } 147e4d217087458914a6d5d9fd034d7237e6530c619Pierre Ossman 148f22ee4edf63e7480511112d9965c71e07be3f8b7Pierre Ossman WARN_ON(!host->claimed); 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 150af8350c756cb48a738474738f7bf8c0e572fa057Pierre Ossman led_trigger_event(host->led, LED_FULL); 151af8350c756cb48a738474738f7bf8c0e572fa057Pierre Ossman 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->cmd->error = 0; 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->cmd->mrq = mrq; 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mrq->data) { 155fe4a3c7a20f14d86022a8132adbf6ddb98e7197cPierre Ossman BUG_ON(mrq->data->blksz > host->max_blk_size); 15655db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman BUG_ON(mrq->data->blocks > host->max_blk_count); 15755db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman BUG_ON(mrq->data->blocks * mrq->data->blksz > 15855db890a838c7b37256241b1fc53d6344aa79cc0Pierre Ossman host->max_req_size); 159fe4a3c7a20f14d86022a8132adbf6ddb98e7197cPierre Ossman 160976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman#ifdef CONFIG_MMC_DEBUG 161976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman sz = 0; 162a84756c5735f28bf000617f18734a9e94426386aPierre Ossman for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) 163a84756c5735f28bf000617f18734a9e94426386aPierre Ossman sz += sg->length; 164976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman BUG_ON(sz != mrq->data->blocks * mrq->data->blksz); 165976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman#endif 166976d9276c826d6b35e4a2478fd4978dbd63bdd6fPierre Ossman 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->cmd->data = mrq->data; 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->data->error = 0; 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->data->mrq = mrq; 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mrq->stop) { 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->data->stop = mrq->stop; 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->stop->error = 0; 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->stop->mrq = mrq; 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ops->request(host, mrq); 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_wait_done(struct mmc_request *mrq) 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds complete(mrq->done_data); 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18467a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman/** 18567a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * mmc_wait_for_req - start a request and wait for completion 18667a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * @host: MMC host to start command 18767a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * @mrq: MMC request to start 18867a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * 18967a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * Start a new MMC custom command request for a host, and wait 19067a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * for the command to complete. Does not attempt to parse the 19167a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * response. 19267a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman */ 19367a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossmanvoid mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1950afffc723c8041a005134099847ac2a2fd0316a0Ingo Molnar DECLARE_COMPLETION_ONSTACK(complete); 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->done_data = &complete; 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq->done = mmc_wait_done; 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_start_request(host, mrq); 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_for_completion(&complete); 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_wait_for_req); 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_wait_for_cmd - start a command and wait for completion 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: MMC host to start command 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @cmd: MMC command to start 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @retries: maximum number of retries 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Start a new MMC command for a host, and wait for the command 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to complete. Return any error that occurred while the command 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * was executing. Do not attempt to parse the response. 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_request mrq; 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 221d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(&mrq, 0, sizeof(struct mmc_request)); 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(cmd->resp, 0, sizeof(cmd->resp)); 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->retries = retries; 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mrq.cmd = cmd; 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd->data = NULL; 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_wait_for_req(host, &mrq); 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cmd->error; 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_wait_for_cmd); 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 238335eadf2ef6a1122a720aea98e758e5d431da87dPierre Ossman/** 239d773d7255199a6c8934e197756f54a1115dd127bRussell King * mmc_set_data_timeout - set the timeout for a data command 240d773d7255199a6c8934e197756f54a1115dd127bRussell King * @data: data phase for command 241d773d7255199a6c8934e197756f54a1115dd127bRussell King * @card: the MMC card associated with the data transfer 24267a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * 24367a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * Computes the data timeout parameters according to the 24467a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * correct algorithm given the card type. 245d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 246b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossmanvoid mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) 247d773d7255199a6c8934e197756f54a1115dd127bRussell King{ 248d773d7255199a6c8934e197756f54a1115dd127bRussell King unsigned int mult; 249d773d7255199a6c8934e197756f54a1115dd127bRussell King 250d773d7255199a6c8934e197756f54a1115dd127bRussell King /* 251e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman * SDIO cards only define an upper 1 s limit on access. 252e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman */ 253e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman if (mmc_card_sdio(card)) { 254e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman data->timeout_ns = 1000000000; 255e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman data->timeout_clks = 0; 256e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman return; 257e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman } 258e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman 259e6f918bf39773d712ab5b457bff54ade3bda0cb1Pierre Ossman /* 260d773d7255199a6c8934e197756f54a1115dd127bRussell King * SD cards use a 100 multiplier rather than 10 261d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 262d773d7255199a6c8934e197756f54a1115dd127bRussell King mult = mmc_card_sd(card) ? 100 : 10; 263d773d7255199a6c8934e197756f54a1115dd127bRussell King 264d773d7255199a6c8934e197756f54a1115dd127bRussell King /* 265d773d7255199a6c8934e197756f54a1115dd127bRussell King * Scale up the multiplier (and therefore the timeout) by 266d773d7255199a6c8934e197756f54a1115dd127bRussell King * the r2w factor for writes. 267d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 268b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossman if (data->flags & MMC_DATA_WRITE) 269d773d7255199a6c8934e197756f54a1115dd127bRussell King mult <<= card->csd.r2w_factor; 270d773d7255199a6c8934e197756f54a1115dd127bRussell King 271d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_ns = card->csd.tacc_ns * mult; 272d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_clks = card->csd.tacc_clks * mult; 273d773d7255199a6c8934e197756f54a1115dd127bRussell King 274d773d7255199a6c8934e197756f54a1115dd127bRussell King /* 275d773d7255199a6c8934e197756f54a1115dd127bRussell King * SD cards also have an upper limit on the timeout. 276d773d7255199a6c8934e197756f54a1115dd127bRussell King */ 277d773d7255199a6c8934e197756f54a1115dd127bRussell King if (mmc_card_sd(card)) { 278d773d7255199a6c8934e197756f54a1115dd127bRussell King unsigned int timeout_us, limit_us; 279d773d7255199a6c8934e197756f54a1115dd127bRussell King 280d773d7255199a6c8934e197756f54a1115dd127bRussell King timeout_us = data->timeout_ns / 1000; 281d773d7255199a6c8934e197756f54a1115dd127bRussell King timeout_us += data->timeout_clks * 1000 / 282d773d7255199a6c8934e197756f54a1115dd127bRussell King (card->host->ios.clock / 1000); 283d773d7255199a6c8934e197756f54a1115dd127bRussell King 284b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossman if (data->flags & MMC_DATA_WRITE) 285493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman /* 286493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman * The limit is really 250 ms, but that is 287493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman * insufficient for some crappy cards. 288493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman */ 289493890e75d98810a3470b4aae23be628ee5e9667Pierre Ossman limit_us = 300000; 290d773d7255199a6c8934e197756f54a1115dd127bRussell King else 291d773d7255199a6c8934e197756f54a1115dd127bRussell King limit_us = 100000; 292d773d7255199a6c8934e197756f54a1115dd127bRussell King 293fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale /* 294fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale * SDHC cards always use these fixed values. 295fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale */ 296fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale if (timeout_us > limit_us || mmc_card_blockaddr(card)) { 297d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_ns = limit_us * 1000; 298d773d7255199a6c8934e197756f54a1115dd127bRussell King data->timeout_clks = 0; 299d773d7255199a6c8934e197756f54a1115dd127bRussell King } 300d773d7255199a6c8934e197756f54a1115dd127bRussell King } 301c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees /* 302c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * Some cards need very high timeouts if driven in SPI mode. 303c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * The worst observed timeout was 900ms after writing a 304c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * continuous stream of data until the internal logic 305c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees * overflowed. 306c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees */ 307c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (mmc_host_is_spi(card->host)) { 308c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (data->flags & MMC_DATA_WRITE) { 309c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (data->timeout_ns < 1000000000) 310c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees data->timeout_ns = 1000000000; /* 1s */ 311c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees } else { 312c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees if (data->timeout_ns < 100000000) 313c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees data->timeout_ns = 100000000; /* 100ms */ 314c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees } 315c0c88871574ccb4ee53dde1bbb678931b38ed47bWolfgang Muees } 316d773d7255199a6c8934e197756f54a1115dd127bRussell King} 317d773d7255199a6c8934e197756f54a1115dd127bRussell KingEXPORT_SYMBOL(mmc_set_data_timeout); 318d773d7255199a6c8934e197756f54a1115dd127bRussell King 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 320ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * mmc_align_data_size - pads a transfer size to a more optimal value 321ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * @card: the MMC card associated with the data transfer 322ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * @sz: original transfer size 323ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * 324ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * Pads the original data size with a number of extra bytes in 325ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * order to avoid controller bugs and/or performance hits 326ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * (e.g. some controllers revert to PIO for certain sizes). 327ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * 328ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * Returns the improved size, which might be unmodified. 329ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * 330ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * Note that this function is only relevant when issuing a 331ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * single scatter gather entry. 332ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman */ 333ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossmanunsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) 334ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman{ 335ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman /* 336ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * FIXME: We don't have a system for the controller to tell 337ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * the core about its problems yet, so for now we just 32-bit 338ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman * align the size. 339ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman */ 340ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman sz = ((sz + 3) / 4) * 4; 341ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman 342ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman return sz; 343ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman} 344ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre OssmanEXPORT_SYMBOL(mmc_align_data_size); 345ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman 346ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15Pierre Ossman/** 3478ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * mmc_host_enable - enable a host. 3488ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * @host: mmc host to enable 3498ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * 3508ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * Hosts that support power saving can use the 'enable' and 'disable' 3518ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * methods to exit and enter power saving states. For more information 3528ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * see comments for struct mmc_host_ops. 3538ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter */ 3548ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterint mmc_host_enable(struct mmc_host *host) 3558ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 3568ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!(host->caps & MMC_CAP_DISABLE)) 3578ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 3588ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3598ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->en_dis_recurs) 3608ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 3618ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3628ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->nesting_cnt++) 3638ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 3648ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3658ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter cancel_delayed_work_sync(&host->disable); 3668ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3678ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->enabled) 3688ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 3698ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3708ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->ops->enable) { 3718ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int err; 3728ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3738ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 1; 3748ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter err = host->ops->enable(host); 3758ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 0; 3768ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3778ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (err) { 3788ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter pr_debug("%s: enable error %d\n", 3798ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_hostname(host), err); 3808ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return err; 3818ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 3828ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 3838ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->enabled = 1; 3848ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 3858ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 3868ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian HunterEXPORT_SYMBOL(mmc_host_enable); 3878ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3888ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterstatic int mmc_host_do_disable(struct mmc_host *host, int lazy) 3898ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 3908ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->ops->disable) { 3918ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int err; 3928ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3938ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 1; 3948ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter err = host->ops->disable(host, lazy); 3958ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->en_dis_recurs = 0; 3968ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 3978ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (err < 0) { 3988ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter pr_debug("%s: disable error %d\n", 3998ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_hostname(host), err); 4008ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return err; 4018ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4028ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (err > 0) { 4038ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter unsigned long delay = msecs_to_jiffies(err); 4048ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4058ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_schedule_delayed_work(&host->disable, delay); 4068ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4078ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 4088ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->enabled = 0; 4098ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4108ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 4118ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4128ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter/** 4138ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * mmc_host_disable - disable a host. 4148ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * @host: mmc host to disable 4158ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * 4168ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * Hosts that support power saving can use the 'enable' and 'disable' 4178ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * methods to exit and enter power saving states. For more information 4188ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * see comments for struct mmc_host_ops. 4198ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter */ 4208ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterint mmc_host_disable(struct mmc_host *host) 4218ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 4228ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int err; 4238ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4248ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!(host->caps & MMC_CAP_DISABLE)) 4258ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4268ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4278ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->en_dis_recurs) 4288ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4298ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4308ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (--host->nesting_cnt) 4318ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4328ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4338ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!host->enabled) 4348ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 4358ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4368ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter err = mmc_host_do_disable(host, 0); 4378ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return err; 4388ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 4398ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian HunterEXPORT_SYMBOL(mmc_host_disable); 4408ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4418ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter/** 4422342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * __mmc_claim_host - exclusively claim a host 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host to claim 4442342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * @abort: whether or not the operation should be aborted 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 4462342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * Claim a host for a set of operations. If @abort is non null and 4472342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * dereference a non-zero value then this will return prematurely with 4482342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * that non-zero value without acquiring the lock. Returns zero 4492342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre * with the lock held otherwise. 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4512342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitreint __mmc_claim_host(struct mmc_host *host, atomic_t *abort) 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 4552342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre int stop; 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 457cf795bfb3ad4e2f8f6bb346aa8edb8272d4c70a2Pierre Ossman might_sleep(); 458cf795bfb3ad4e2f8f6bb346aa8edb8272d4c70a2Pierre Ossman 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&host->wq, &wait); 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&host->lock, flags); 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (1) { 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 4632342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre stop = abort ? atomic_read(abort) : 0; 464319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (stop || !host->claimed || host->claimer == current) 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&host->lock, flags); 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&host->lock, flags); 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_RUNNING); 471319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (!stop) { 4722342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre host->claimed = 1; 473319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimer = current; 474319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claim_cnt += 1; 475319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter } else 4762342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre wake_up(&host->wq); 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&host->lock, flags); 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&host->wq, &wait); 4798ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!stop) 4808ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_host_enable(host); 4812342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas Pitre return stop; 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4842342f3323c9a76367a1d7f9a35525ee3cb3911dfNicolas PitreEXPORT_SYMBOL(__mmc_claim_host); 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 486319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter/** 487319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * mmc_try_claim_host - try exclusively to claim a host 488319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * @host: mmc host to claim 489319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * 490319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter * Returns %1 if the host is claimed, %0 otherwise. 491319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter */ 492319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunterint mmc_try_claim_host(struct mmc_host *host) 4938ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 4948ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter int claimed_host = 0; 4958ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter unsigned long flags; 4968ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 4978ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter spin_lock_irqsave(&host->lock, flags); 498319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (!host->claimed || host->claimer == current) { 4998ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter host->claimed = 1; 500319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimer = current; 501319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claim_cnt += 1; 5028ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter claimed_host = 1; 5038ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } 5048ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter spin_unlock_irqrestore(&host->lock, flags); 5058ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return claimed_host; 5068ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 507319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian HunterEXPORT_SYMBOL(mmc_try_claim_host); 5088ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5098ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterstatic void mmc_do_release_host(struct mmc_host *host) 5108ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 5118ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter unsigned long flags; 5128ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5138ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter spin_lock_irqsave(&host->lock, flags); 514319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter if (--host->claim_cnt) { 515319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter /* Release for nested claim */ 516319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter spin_unlock_irqrestore(&host->lock, flags); 517319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter } else { 518319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimed = 0; 519319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter host->claimer = NULL; 520319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter spin_unlock_irqrestore(&host->lock, flags); 521319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter wake_up(&host->wq); 522319a3f1429c91147058ac26c5f5bac8ec1730bc6Adrian Hunter } 5238ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 5248ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5258ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Huntervoid mmc_host_deeper_disable(struct work_struct *work) 5268ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 5278ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter struct mmc_host *host = 5288ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter container_of(work, struct mmc_host, disable.work); 5298ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5308ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter /* If the host is claimed then we do not want to disable it anymore */ 5318ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!mmc_try_claim_host(host)) 5328ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return; 5338ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_host_do_disable(host, 1); 5348ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_do_release_host(host); 5358ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 5368ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5378ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter/** 5388ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * mmc_host_lazy_disable - lazily disable a host. 5398ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * @host: mmc host to disable 5408ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * 5418ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * Hosts that support power saving can use the 'enable' and 'disable' 5428ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * methods to exit and enter power saving states. For more information 5438ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter * see comments for struct mmc_host_ops. 5448ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter */ 5458ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunterint mmc_host_lazy_disable(struct mmc_host *host) 5468ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter{ 5478ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!(host->caps & MMC_CAP_DISABLE)) 5488ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5498ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5508ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->en_dis_recurs) 5518ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5528ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5538ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (--host->nesting_cnt) 5548ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5558ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5568ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (!host->enabled) 5578ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5588ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5598ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->disable_delay) { 5608ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_schedule_delayed_work(&host->disable, 5618ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter msecs_to_jiffies(host->disable_delay)); 5628ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return 0; 5638ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter } else 5648ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter return mmc_host_do_disable(host, 1); 5658ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter} 5668ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian HunterEXPORT_SYMBOL(mmc_host_lazy_disable); 5678ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_release_host - release a host 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host to release 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Release a MMC host, allowing others to claim the host 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for their operations. 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid mmc_release_host(struct mmc_host *host) 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 577d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5798ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_host_lazy_disable(host); 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5818ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter mmc_do_release_host(host); 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_release_host); 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5867ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 5877ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Internal function that does the actual ios call to the host driver, 5887ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * optionally printing some debug output. 5897ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 590920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell Kingstatic inline void mmc_set_ios(struct mmc_host *host) 591920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King{ 592920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King struct mmc_ios *ios = &host->ios; 593920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King 594cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " 595cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman "width %u timing %u\n", 596920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_hostname(host), ios->clock, ios->bus_mode, 597920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King ios->power_mode, ios->chip_select, ios->vdd, 598cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman ios->bus_width, ios->timing); 599fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale 600920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King host->ops->set_ios(host, ios); 601920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King} 602920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King 6037ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 6047ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Control chip select pin on a host. 6057ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 606da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossmanvoid mmc_set_chip_select(struct mmc_host *host, int mode) 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 608da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman host->ios.chip_select = mode; 609da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman mmc_set_ios(host); 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 6137ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Sets the host clock to the highest possible frequency that 6147ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * is below "hz". 6157ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 6167ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_set_clock(struct mmc_host *host, unsigned int hz) 6177ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 6187ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman WARN_ON(hz < host->f_min); 6197ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 6207ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (hz > host->f_max) 6217ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman hz = host->f_max; 6227ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 6237ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.clock = hz; 6247ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 6257ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 6267ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 6277ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 6287ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Change the bus mode (open drain/push-pull) of a host. 6297ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 6307ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) 6317ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 6327ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.bus_mode = mode; 6337ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 6347ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 6357ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 6367ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 6377ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Change data bus width of a host. 6387ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 6397ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_set_bus_width(struct mmc_host *host, unsigned int width) 6407ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 6417ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.bus_width = width; 6427ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 6437ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 6447ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 64586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov/** 64686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number 64786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @vdd: voltage (mV) 64886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @low_bits: prefer low bits in boundary cases 64986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 65086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * This function returns the OCR bit number according to the provided @vdd 65186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * value. If conversion is not possible a negative errno value returned. 65286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 65386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * Depending on the @low_bits flag the function prefers low or high OCR bits 65486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * on boundary voltages. For example, 65586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); 65686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); 65786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 65886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). 65986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov */ 66086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsovstatic int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) 66186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov{ 66286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov const int max_bit = ilog2(MMC_VDD_35_36); 66386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov int bit; 66486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 66586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd < 1650 || vdd > 3600) 66686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return -EINVAL; 66786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 66886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd >= 1650 && vdd <= 1950) 66986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return ilog2(MMC_VDD_165_195); 67086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 67186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (low_bits) 67286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov vdd -= 1; 67386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 67486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Base 2000 mV, step 100 mV, bit's base 8. */ 67586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov bit = (vdd - 2000) / 100 + 8; 67686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (bit > max_bit) 67786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return max_bit; 67886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return bit; 67986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov} 68086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 68186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov/** 68286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask 68386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @vdd_min: minimum voltage value (mV) 68486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * @vdd_max: maximum voltage value (mV) 68586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 68686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * This function returns the OCR mask bits according to the provided @vdd_min 68786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * and @vdd_max values. If conversion is not possible the function returns 0. 68886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * 68986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * Notes wrt boundary cases: 69086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * This function sets the OCR bits for all boundary voltages, for example 69186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | 69286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov * MMC_VDD_34_35 mask. 69386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov */ 69486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsovu32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) 69586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov{ 69686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov u32 mask = 0; 69786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 69886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd_max < vdd_min) 69986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return 0; 70086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 70186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Prefer high bits for the boundary vdd_max values. */ 70286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); 70386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd_max < 0) 70486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return 0; 70586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 70686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Prefer low bits for the boundary vdd_min values. */ 70786e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); 70886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov if (vdd_min < 0) 70986e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return 0; 71086e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 71186e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov /* Fill the mask, from max bit to min bit. */ 71286e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov while (vdd_max >= vdd_min) 71386e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov mask |= 1 << vdd_max--; 71486e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 71586e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov return mask; 71686e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov} 71786e8286a0e48663e1e86a5884b30a6d05de2993aAnton VorontsovEXPORT_SYMBOL(mmc_vddrange_to_ocrmask); 71886e8286a0e48663e1e86a5884b30a6d05de2993aAnton Vorontsov 7195c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell#ifdef CONFIG_REGULATOR 7205c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 7215c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell/** 7225c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * mmc_regulator_get_ocrmask - return mask of supported voltages 7235c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * @supply: regulator to use 7245c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * 7255c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * This returns either a negative errno, or a mask of voltages that 7265c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * can be provided to MMC/SD/SDIO devices using the specified voltage 7275c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * regulator. This would normally be called before registering the 7285c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * MMC host adapter. 7295c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 7305c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownellint mmc_regulator_get_ocrmask(struct regulator *supply) 7315c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell{ 7325c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int result = 0; 7335c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int count; 7345c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int i; 7355c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 7365c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell count = regulator_count_voltages(supply); 7375c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (count < 0) 7385c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell return count; 7395c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 7405c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell for (i = 0; i < count; i++) { 7415c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int vdd_uV; 7425c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int vdd_mV; 7435c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 7445c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell vdd_uV = regulator_list_voltage(supply, i); 7455c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (vdd_uV <= 0) 7465c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell continue; 7475c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 7485c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell vdd_mV = vdd_uV / 1000; 7495c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); 7505c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } 7515c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 7525c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell return result; 7535c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell} 7545c13941acc513669c7d07b28789c3f9ba66ddddfDavid BrownellEXPORT_SYMBOL(mmc_regulator_get_ocrmask); 7555c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 7565c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell/** 7575c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * mmc_regulator_set_ocr - set regulator to match host->ios voltage 7585c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * @vdd_bit: zero for power off, else a bit number (host->ios.vdd) 7595c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * @supply: regulator to use 7605c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * 7615c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * Returns zero on success, else negative errno. 7625c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * 7635c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * MMC host drivers may use this to enable or disable a regulator using 7645c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * a particular supply voltage. This would normally be called from the 7655c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * set_ios() method. 7665c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 7675c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownellint mmc_regulator_set_ocr(struct regulator *supply, unsigned short vdd_bit) 7685c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell{ 7695c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int result = 0; 7705c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int min_uV, max_uV; 7715c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int enabled; 7725c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 7735c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell enabled = regulator_is_enabled(supply); 7745c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (enabled < 0) 7755c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell return enabled; 7765c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 7775c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (vdd_bit) { 7785c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int tmp; 7795c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell int voltage; 7805c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 7815c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell /* REVISIT mmc_vddrange_to_ocrmask() may have set some 7825c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * bits this regulator doesn't quite support ... don't 7835c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * be too picky, most cards and regulators are OK with 7845c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * a 0.1V range goof (it's a small error percentage). 7855c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 7865c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell tmp = vdd_bit - ilog2(MMC_VDD_165_195); 7875c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (tmp == 0) { 7885c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell min_uV = 1650 * 1000; 7895c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell max_uV = 1950 * 1000; 7905c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } else { 7915c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell min_uV = 1900 * 1000 + tmp * 100 * 1000; 7925c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell max_uV = min_uV + 100 * 1000; 7935c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } 7945c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 7955c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell /* avoid needless changes to this voltage; the regulator 7965c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell * might not allow this operation 7975c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell */ 7985c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell voltage = regulator_get_voltage(supply); 7995c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (voltage < 0) 8005c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = voltage; 8015c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell else if (voltage < min_uV || voltage > max_uV) 8025c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = regulator_set_voltage(supply, min_uV, max_uV); 8035c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell else 8045c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = 0; 8055c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8065c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell if (result == 0 && !enabled) 8075c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = regulator_enable(supply); 8085c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } else if (enabled) { 8095c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell result = regulator_disable(supply); 8105c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell } 8115c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8125c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell return result; 8135c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell} 8145c13941acc513669c7d07b28789c3f9ba66ddddfDavid BrownellEXPORT_SYMBOL(mmc_regulator_set_ocr); 8155c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8165c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell#endif 8175c13941acc513669c7d07b28789c3f9ba66ddddfDavid Brownell 8187ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Mask off any voltages we don't support and select 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the lowest voltage 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8227ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanu32 mmc_select_voltage(struct mmc_host *host, u32 ocr) 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int bit; 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ocr &= host->ocr_avail; 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bit = ffs(ocr); 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bit) { 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bit -= 1; 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 83263ef731aa6a81e286de78dcc92241d123424ed39Timo Teras ocr &= 3 << bit; 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.vdd = bit; 835920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 837f6e10b865c3ea56bdaa8c6ecfee313b997900dbbDavid Brownell pr_warning("%s: host doesn't support card's voltages\n", 838f6e10b865c3ea56bdaa8c6ecfee313b997900dbbDavid Brownell mmc_hostname(host)); 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ocr = 0; 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ocr; 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 8467ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Select timing parameters for host. 847b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman */ 8487ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_set_timing(struct mmc_host *host, unsigned int timing) 849b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman{ 8507ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->ios.timing = timing; 8517ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_ios(host); 852b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman} 853b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 854b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman/* 85545f8245b972e360c19aec9032e2a2033b8ac3719Russell King * Apply power to the MMC stack. This is a two-stage process. 85645f8245b972e360c19aec9032e2a2033b8ac3719Russell King * First, we enable power to the card without the clock running. 85745f8245b972e360c19aec9032e2a2033b8ac3719Russell King * We then wait a bit for the power to stabilise. Finally, 85845f8245b972e360c19aec9032e2a2033b8ac3719Russell King * enable the bus drivers and clock to the card. 85945f8245b972e360c19aec9032e2a2033b8ac3719Russell King * 86045f8245b972e360c19aec9032e2a2033b8ac3719Russell King * We must _NOT_ enable the clock prior to power stablising. 86145f8245b972e360c19aec9032e2a2033b8ac3719Russell King * 86245f8245b972e360c19aec9032e2a2033b8ac3719Russell King * If a host does all the power sequencing itself, ignore the 86345f8245b972e360c19aec9032e2a2033b8ac3719Russell King * initial MMC_POWER_UP stage. 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_power_up(struct mmc_host *host) 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 867500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao int bit; 868500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao 869500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao /* If ocr is set, we use it */ 870500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao if (host->ocr) 871500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao bit = ffs(host->ocr) - 1; 872500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao else 873500f35648e5ebd04be00f974738a9db959a892b8Balaji Rao bit = fls(host->ocr_avail) - 1; 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.vdd = bit; 876af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (mmc_host_is_spi(host)) { 877af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.chip_select = MMC_CS_HIGH; 878af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; 879af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } else { 880af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.chip_select = MMC_CS_DONTCARE; 881af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; 882af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.power_mode = MMC_POWER_UP; 884f218278a456b3c272b480443c89004c3d2a49f18Pierre Ossman host->ios.bus_width = MMC_BUS_WIDTH_1; 885cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman host->ios.timing = MMC_TIMING_LEGACY; 886920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 888f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman /* 889f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * This delay should be sufficient to allow the power supply 890f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * to reach the minimum voltage. 891f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman */ 89279bccc5aefb4e64e651abe04f78c3e6bf8acd6f0José M. Fernández mmc_delay(10); 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8948dfd0374be84793360db7fff2e635d2cd3bbcb21Sascha Hauer if (host->f_min > 400000) { 8958dfd0374be84793360db7fff2e635d2cd3bbcb21Sascha Hauer pr_warning("%s: Minimum clock frequency too high for " 8968dfd0374be84793360db7fff2e635d2cd3bbcb21Sascha Hauer "identification mode\n", mmc_hostname(host)); 8978dfd0374be84793360db7fff2e635d2cd3bbcb21Sascha Hauer host->ios.clock = host->f_min; 8988dfd0374be84793360db7fff2e635d2cd3bbcb21Sascha Hauer } else 8998dfd0374be84793360db7fff2e635d2cd3bbcb21Sascha Hauer host->ios.clock = 400000; 9008dfd0374be84793360db7fff2e635d2cd3bbcb21Sascha Hauer 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.power_mode = MMC_POWER_ON; 902920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 904f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman /* 905f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * This delay must be at least 74 clock sizes, or 1 ms, or the 906f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman * time required to reach a stable voltage. 907f9996aee36921e8f1d499de1b2ea380855cf6d97Pierre Ossman */ 90879bccc5aefb4e64e651abe04f78c3e6bf8acd6f0José M. Fernández mmc_delay(10); 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_power_off(struct mmc_host *host) 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.clock = 0; 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.vdd = 0; 915af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (!mmc_host_is_spi(host)) { 916af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; 917af51715079e7fb6b290e1881d63d815dc4de5011David Brownell host->ios.chip_select = MMC_CS_DONTCARE; 918af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds host->ios.power_mode = MMC_POWER_OFF; 920f218278a456b3c272b480443c89004c3d2a49f18Pierre Ossman host->ios.bus_width = MMC_BUS_WIDTH_1; 921cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman host->ios.timing = MMC_TIMING_LEGACY; 922920e70c5c603ada05dd480ca0ccc0ae12a5fdc39Russell King mmc_set_ios(host); 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 926393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * Cleanup when the last reference to the bus operator is dropped. 927393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk */ 928261172fd1b23769bc7632047e2cb826c9b8b1a50Adrian Bunkstatic void __mmc_release_bus(struct mmc_host *host) 929393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk{ 930393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk BUG_ON(!host); 931393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk BUG_ON(host->bus_refs); 932393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk BUG_ON(!host->bus_dead); 933393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 934393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk host->bus_ops = NULL; 935393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk} 936393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 937393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk/* 938393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * Increase reference count of bus operator 939393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk */ 940393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunkstatic inline void mmc_bus_get(struct mmc_host *host) 941393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk{ 942393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk unsigned long flags; 943393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 944393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_lock_irqsave(&host->lock, flags); 945393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk host->bus_refs++; 946393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_unlock_irqrestore(&host->lock, flags); 947393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk} 948393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 949393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk/* 950393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * Decrease reference count of bus operator and free it if 951393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk * it is the last reference. 952393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk */ 953393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunkstatic inline void mmc_bus_put(struct mmc_host *host) 954393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk{ 955393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk unsigned long flags; 956393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 957393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_lock_irqsave(&host->lock, flags); 958393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk host->bus_refs--; 959393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk if ((host->bus_refs == 0) && host->bus_ops) 960393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk __mmc_release_bus(host); 961393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk spin_unlock_irqrestore(&host->lock, flags); 962393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk} 963393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk 964393618510d5349e07d71dc28fb6fc49baf0d96a0Adrian Bunk/* 9657ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Assign a mmc bus handler to a host. Only one bus handler may control a 9667ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * host at any given time. 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9687ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9707ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman unsigned long flags; 971e45a1bd20fa5b920901879e85cdf5eda21f78d7cPhilip Langdale 9727ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(!host); 9737ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(!ops); 974b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman 975d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 976bce40a36de574376f41f1ff3c4d212a7da2a3c90Philip Langdale 9777ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_lock_irqsave(&host->lock, flags); 978bce40a36de574376f41f1ff3c4d212a7da2a3c90Philip Langdale 9797ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(host->bus_ops); 9807ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(host->bus_refs); 981b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 9827ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_ops = ops; 9837ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_refs = 1; 9847ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_dead = 0; 985b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 9867ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_unlock_irqrestore(&host->lock, flags); 987b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman} 988b57c43ad81602589afca3948a5a7121e40026e17Pierre Ossman 9897ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 9907ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Remove the current bus handler from a host. Assumes that there are 9917ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * no interesting cards left, so the bus is powered down. 9927ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 9937ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanvoid mmc_detach_bus(struct mmc_host *host) 9947ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman{ 9957ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman unsigned long flags; 9967ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 9977ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(!host); 9987ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 999d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 1000d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->bus_ops); 1001cd9277c011a99769fa371521b460ed57f6d280b1Pierre Ossman 10027ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_lock_irqsave(&host->lock, flags); 10037ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 10047ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_dead = 1; 10057ccd266e676a3f0c6f8f897f58b684cac3dd1650Pierre Ossman 10067ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman spin_unlock_irqrestore(&host->lock, flags); 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10087ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_power_off(host); 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10107ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_detect_change - process change of state on a MMC socket 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: host which changed state. 10168dc003359cc3996abad9e53a7b2280b272610283Richard Purdie * @delay: optional delay to wait before detection (jiffies) 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 101867a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * MMC drivers should call this when they detect a card has been 101967a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * inserted or removed. The MMC layer will confirm that any 102067a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * present card is still functional, and initialize any newly 102167a61c484735de9bf4f099830ecb4ef2eca95c38Pierre Ossman * inserted. 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10238dc003359cc3996abad9e53a7b2280b272610283Richard Purdievoid mmc_detect_change(struct mmc_host *host, unsigned long delay) 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10253b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#ifdef CONFIG_MMC_DEBUG 10261efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman unsigned long flags; 102701f41ec7b36e14da18a4e162ef697ae358f36e37Andrew Morton spin_lock_irqsave(&host->lock, flags); 1028d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(host->removed); 102901f41ec7b36e14da18a4e162ef697ae358f36e37Andrew Morton spin_unlock_irqrestore(&host->lock, flags); 10303b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#endif 10313b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman 1032c4028958b6ecad064b1a6303a6a5906d4fe48d73David Howells mmc_schedule_delayed_work(&host->detect, delay); 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_detect_change); 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1038b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossmanvoid mmc_rescan(struct work_struct *work) 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1040c4028958b6ecad064b1a6303a6a5906d4fe48d73David Howells struct mmc_host *host = 1041c4028958b6ecad064b1a6303a6a5906d4fe48d73David Howells container_of(work, struct mmc_host, detect.work); 10427ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman u32 ocr; 10437ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman int err; 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10457ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_get(host); 1046b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman 104794d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer /* if there is a card registered, check whether it is still present */ 104894d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if ((host->bus_ops != NULL) && host->bus_ops->detect && !host->bus_dead) 104994d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer host->bus_ops->detect(host); 105094d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer 105194d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_bus_put(host); 105294d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer 105394d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer 105494d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_bus_get(host); 105594d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer 105694d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer /* if there still is a card present, stop here */ 105794d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (host->bus_ops != NULL) { 10587ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 105994d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer goto out; 106094d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer } 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 106294d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer /* detect a newly inserted card */ 106328f52482b41edc88cdf575aa6ed414c6e116ce10Anton Vorontsov 106494d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer /* 106594d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer * Only we can add a new handler, so it's safe to 106694d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer * release the lock here. 106794d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer */ 106894d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_bus_put(host); 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 107094d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (host->ops->get_cd && host->ops->get_cd(host) == 0) 107194d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer goto out; 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 107394d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_claim_host(host); 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 107594d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_power_up(host); 107694d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_go_idle(host); 10775c4e6f1301649d5b29dd0f70e6da83e728ab5ca5Pierre Ossman 107894d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_send_if_cond(host, host->ocr_avail); 10795c4e6f1301649d5b29dd0f70e6da83e728ab5ca5Pierre Ossman 108094d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer /* 108194d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer * First we search for SDIO... 108294d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer */ 108394d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer err = mmc_send_io_op_cond(host, 0, &ocr); 108494d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (!err) { 108594d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (mmc_attach_sdio(host, ocr)) 108694d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_power_off(host); 108794d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer goto out; 108894d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer } 10895c4e6f1301649d5b29dd0f70e6da83e728ab5ca5Pierre Ossman 109094d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer /* 109194d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer * ...then normal SD... 109294d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer */ 109394d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer err = mmc_send_app_op_cond(host, 0, &ocr); 109494d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (!err) { 109594d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (mmc_attach_sd(host, ocr)) 109694d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_power_off(host); 109794d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer goto out; 109894d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer } 10997ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 110094d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer /* 110194d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer * ...and finally MMC. 110294d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer */ 110394d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer err = mmc_send_op_cond(host, 0, &ocr); 110494d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (!err) { 110594d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer if (mmc_attach_mmc(host, ocr)) 110694d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_power_off(host); 110794d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer goto out; 11087ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman } 110994d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer 111094d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_release_host(host); 111194d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer mmc_power_off(host); 111294d89efb2c347a82a08a61dbac8565b1087c3259Jorg Schummer 111328f52482b41edc88cdf575aa6ed414c6e116ce10Anton Vorontsovout: 111428f52482b41edc88cdf575aa6ed414c6e116ce10Anton Vorontsov if (host->caps & MMC_CAP_NEEDS_POLL) 111528f52482b41edc88cdf575aa6ed414c6e116ce10Anton Vorontsov mmc_schedule_delayed_work(&host->detect, HZ); 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1118b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossmanvoid mmc_start_host(struct mmc_host *host) 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1120b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossman mmc_power_off(host); 1121b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossman mmc_detect_change(host, 0); 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1124b93931a61a119575f84c33af2438b9384fde9eb7Pierre Ossmanvoid mmc_stop_host(struct mmc_host *host) 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11263b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#ifdef CONFIG_MMC_DEBUG 11271efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman unsigned long flags; 11281efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman spin_lock_irqsave(&host->lock, flags); 11293b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman host->removed = 1; 11301efd48b3ae8f89a1d04f1e36be96764d7bf43ae9Pierre Ossman spin_unlock_irqrestore(&host->lock, flags); 11313b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman#endif 11323b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman 11338ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->caps & MMC_CAP_DISABLE) 11348ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter cancel_delayed_work(&host->disable); 11357de427d088a967d2173739e21e744921d5496a8bJorg Schummer cancel_delayed_work(&host->detect); 11363b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman mmc_flush_scheduled_work(); 11373b91e5507cddaca53bccf1524ff11a0ac5c85531Pierre Ossman 11387ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_get(host); 11397ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (host->bus_ops && !host->bus_dead) { 11407ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (host->bus_ops->remove) 11417ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->bus_ops->remove(host); 11427ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 11437ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_claim_host(host); 11447ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_detach_bus(host); 11457ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_release_host(host); 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11477ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 11487ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 11497ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman BUG_ON(host->card); 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_power_off(host); 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_PM 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_suspend_host - suspend a host 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @state: suspend mode (PM_SUSPEND_xxx) 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1161e5378ca8c0ab684bd9339dc6827dd5a042f9e6fcPavel Machekint mmc_suspend_host(struct mmc_host *host, pm_message_t state) 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11638ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter if (host->caps & MMC_CAP_DISABLE) 11648ea926b22e2d13238e4d65d8f61c48fe424e6f4fAdrian Hunter cancel_delayed_work(&host->disable); 11657de427d088a967d2173739e21e744921d5496a8bJorg Schummer cancel_delayed_work(&host->detect); 1166b5af25bee2de2f6cd1ac74ba737cbc4f3d303e5dPierre Ossman mmc_flush_scheduled_work(); 1167b5af25bee2de2f6cd1ac74ba737cbc4f3d303e5dPierre Ossman 11687ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_get(host); 11697ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (host->bus_ops && !host->bus_dead) { 11706abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (host->bus_ops->suspend) 11716abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman host->bus_ops->suspend(host); 11726abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (!host->bus_ops->resume) { 11736abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (host->bus_ops->remove) 11746abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman host->bus_ops->remove(host); 11756abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 11766abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_claim_host(host); 11776abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_detach_bus(host); 11786abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_release_host(host); 11796abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman } 1180b5af25bee2de2f6cd1ac74ba737cbc4f3d303e5dPierre Ossman } 11817ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_bus_put(host); 11827ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_power_off(host); 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_suspend_host); 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mmc_resume_host - resume a previously suspended host 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @host: mmc host 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint mmc_resume_host(struct mmc_host *host) 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11966abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_bus_get(host); 11976abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (host->bus_ops && !host->bus_dead) { 11986abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_power_up(host); 1199d3096f88ac4596a509fc5fbe6fa7e7a5497eb399Balaji Rao mmc_select_voltage(host, host->ocr); 12006abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman BUG_ON(!host->bus_ops->resume); 12016abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman host->bus_ops->resume(host); 12026abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman } 12036abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_bus_put(host); 12046abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 12056abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman /* 12066abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * We add a slight delay here so that resume can progress 12076abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * in parallel. 12086abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman */ 12096abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_detect_change(host, 1); 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mmc_resume_host); 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1218ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic int __init mmc_init(void) 1219ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 1220ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman int ret; 1221ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 1222ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman workqueue = create_singlethread_workqueue("kmmcd"); 1223ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman if (!workqueue) 1224ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman return -ENOMEM; 1225ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 1226ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman ret = mmc_register_bus(); 1227e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman if (ret) 1228e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman goto destroy_workqueue; 1229e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1230e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman ret = mmc_register_host_class(); 1231e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman if (ret) 1232e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman goto unregister_bus; 1233e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1234e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman ret = sdio_register_bus(); 1235e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman if (ret) 1236e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman goto unregister_host_class; 1237e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1238e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman return 0; 1239e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1240e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossmanunregister_host_class: 1241e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman mmc_unregister_host_class(); 1242e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossmanunregister_bus: 1243e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman mmc_unregister_bus(); 1244e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossmandestroy_workqueue: 1245e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman destroy_workqueue(workqueue); 1246e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman 1247ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman return ret; 1248ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 1249ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 1250ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanstatic void __exit mmc_exit(void) 1251ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman{ 1252e29a7d73f4277eb92aa64e17017dea33460828efPierre Ossman sdio_unregister_bus(); 1253ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman mmc_unregister_host_class(); 1254ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman mmc_unregister_bus(); 1255ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman destroy_workqueue(workqueue); 1256ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman} 1257ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 125826074962e8f547b96614dbe248748ba2a1996ca3Nicolas Pitresubsys_initcall(mmc_init); 1259ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossmanmodule_exit(mmc_exit); 1260ffce2e7e7060c949ccd703dacc9b3dd81b377373Pierre Ossman 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 1262