block.c revision b7a03210b7b381e06f71751cb9addfae7704489c
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Block driver for media (i.e., flash cards) 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright 2002 Hewlett-Packard Company 5979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman * Copyright 2005-2008 Pierre Ossman 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Use consistent with the GNU GPL is permitted, 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * provided that this copyright notice is 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * preserved in its entirety in all copies and derived works. 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FITNESS FOR ANY PARTICULAR PURPOSE. 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Many thanks to Alessandro Rubini and Jonathan Corbet! 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Author: Andrew Christian 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 28 May 2002 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/moduleparam.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fs.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/hdreg.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kdev_t.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/blkdev.h> 30a621aaed690b9439141c555941b6af53873f6ff1Arjan van de Ven#include <linux/mutex.h> 31ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman#include <linux/scatterlist.h> 32a7bbb57333447d0cf950992653b6b079585f3531Pierre Ossman#include <linux/string_helpers.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mmc/card.h> 35385e3227d4d83ab13d7767c4bb3593b0256bf246Pierre Ossman#include <linux/mmc/host.h> 36da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include <linux/mmc/mmc.h> 37da7fbe58d2d347e95af699ddf04d885be6362bbePierre Ossman#include <linux/mmc/sd.h> 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/system.h> 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4298ac2162699f7e9880683cb954891817f20b607cPierre Ossman#include "queue.h" 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * max 8 partitions per card 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MMC_SHIFT 3 481dff314451fa24d6b107aa05393d3169e56a7e0aDavid Woodhouse#define MMC_NUM_MINORS (256 >> MMC_SHIFT) 491dff314451fa24d6b107aa05393d3169e56a7e0aDavid Woodhouse 50203c80187eba037f2d6562e0d5847014746726ddBen Collinsstatic DECLARE_BITMAP(dev_use, MMC_NUM_MINORS); 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * There is one mmc_blk_data per slot. 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct mmc_blk_data { 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spinlock_t lock; 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gendisk *disk; 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_queue queue; 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int usage; 61a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King unsigned int read_only; 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 64a621aaed690b9439141c555941b6af53873f6ff1Arjan van de Venstatic DEFINE_MUTEX(open_lock); 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md; 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 70a621aaed690b9439141c555941b6af53873f6ff1Arjan van de Ven mutex_lock(&open_lock); 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md = disk->private_data; 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md && md->usage == 0) 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md = NULL; 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md) 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md->usage++; 76a621aaed690b9439141c555941b6af53873f6ff1Arjan van de Ven mutex_unlock(&open_lock); 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return md; 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_blk_put(struct mmc_blk_data *md) 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 83a621aaed690b9439141c555941b6af53873f6ff1Arjan van de Ven mutex_lock(&open_lock); 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md->usage--; 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md->usage == 0) { 86f331c0296f2a9fee0d396a70598b954062603015Tejun Heo int devidx = MINOR(disk_devt(md->disk)) >> MMC_SHIFT; 871dff314451fa24d6b107aa05393d3169e56a7e0aDavid Woodhouse __clear_bit(devidx, dev_use); 881dff314451fa24d6b107aa05393d3169e56a7e0aDavid Woodhouse 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_disk(md->disk); 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(md); 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 92a621aaed690b9439141c555941b6af53873f6ff1Arjan van de Ven mutex_unlock(&open_lock); 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 95a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Virostatic int mmc_blk_open(struct block_device *bdev, fmode_t mode) 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 97a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Viro struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk); 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = -ENXIO; 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md) { 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md->usage == 2) 102a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Viro check_disk_change(bdev); 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = 0; 104a00fc09029f02ca833cf90e5d5625f08c4ac4f51Pierre Ossman 105a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Viro if ((mode & FMODE_WRITE) && md->read_only) { 10670bb08962ea9bd50797ae9f16b2493f5f7c65053Andrew Morton mmc_blk_put(md); 107a00fc09029f02ca833cf90e5d5625f08c4ac4f51Pierre Ossman ret = -EROFS; 10870bb08962ea9bd50797ae9f16b2493f5f7c65053Andrew Morton } 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 114a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Virostatic int mmc_blk_release(struct gendisk *disk, fmode_t mode) 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 116a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Viro struct mmc_blk_data *md = disk->private_data; 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_blk_put(md); 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 123a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwigmmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 125a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); 126a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig geo->heads = 4; 127a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig geo->sectors = 16; 128a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig return 0; 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct block_device_operations mmc_bdops = { 132a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Viro .open = mmc_blk_open, 133a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Viro .release = mmc_blk_release, 134a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig .getgeo = mmc_blk_getgeo, 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct mmc_blk_request { 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_request mrq; 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_command cmd; 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_command stop; 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_data data; 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 145ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossmanstatic u32 mmc_sd_num_wr_blocks(struct mmc_card *card) 146ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman{ 147ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman int err; 148b7a03210b7b381e06f71751cb9addfae7704489cHarvey Harrison __be32 blocks; 149ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 150ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman struct mmc_request mrq; 151ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman struct mmc_command cmd; 152ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman struct mmc_data data; 153ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman unsigned int timeout_us; 154ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 155ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman struct scatterlist sg; 156ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 157ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman memset(&cmd, 0, sizeof(struct mmc_command)); 158ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 159ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman cmd.opcode = MMC_APP_CMD; 160ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman cmd.arg = card->rca << 16; 1617213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; 162ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 163ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman err = mmc_wait_for_cmd(card->host, &cmd, 0); 1647213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell if (err) 1657213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell return (u32)-1; 1667213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) 167ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman return (u32)-1; 168ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 169ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman memset(&cmd, 0, sizeof(struct mmc_command)); 170ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 171ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; 172ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman cmd.arg = 0; 1737213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; 174ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 175ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman memset(&data, 0, sizeof(struct mmc_data)); 176ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 177ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.timeout_ns = card->csd.tacc_ns * 100; 178ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.timeout_clks = card->csd.tacc_clks * 100; 179ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 180ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman timeout_us = data.timeout_ns / 1000; 181ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman timeout_us += data.timeout_clks * 1000 / 182ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman (card->host->ios.clock / 1000); 183ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 184ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman if (timeout_us > 100000) { 185ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.timeout_ns = 100000000; 186ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.timeout_clks = 0; 187ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman } 188ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 189ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.blksz = 4; 190ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.blocks = 1; 191ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.flags = MMC_DATA_READ; 192ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.sg = &sg; 193ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.sg_len = 1; 194ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 195ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman memset(&mrq, 0, sizeof(struct mmc_request)); 196ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 197ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman mrq.cmd = &cmd; 198ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman mrq.data = &data; 199ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 200ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman sg_init_one(&sg, &blocks, 4); 201ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 202ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman mmc_wait_for_req(card->host, &mrq); 203ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 20417b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman if (cmd.error || data.error) 205ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman return (u32)-1; 206ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 207b7a03210b7b381e06f71751cb9addfae7704489cHarvey Harrison return ntohl(blocks); 208ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman} 209ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md = mq->data; 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_card *card = md->queue.card; 214176f00ffed3ef94a198326fbf6a5db64f1cf73adPierre Ossman struct mmc_blk_request brq; 215f3eb0aaa0211fd804057070bee1fd067cd65cb13Pierre Ossman int ret = 1; 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 217b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman mmc_claim_host(card->host); 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do { 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_command cmd; 221db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King u32 readcmd, writecmd; 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(&brq, 0, sizeof(struct mmc_blk_request)); 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds brq.mrq.cmd = &brq.cmd; 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds brq.mrq.data = &brq.data; 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 227fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale brq.cmd.arg = req->sector; 228fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale if (!mmc_card_blockaddr(card)) 229fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale brq.cmd.arg <<= 9; 2307213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell brq.cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; 23108846698703dedae6c6915eb4b4d0a36188c5635Pierre Ossman brq.data.blksz = 512; 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds brq.stop.opcode = MMC_STOP_TRANSMISSION; 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds brq.stop.arg = 0; 2347213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell brq.stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; 23508846698703dedae6c6915eb4b4d0a36188c5635Pierre Ossman brq.data.blocks = req->nr_sectors; 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 237788ee7b09883515f3a72a8f2a980df5e94f37e2cRussell King if (brq.data.blocks > 1) { 2387213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell /* SPI multiblock writes terminate using a special 2397213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell * token, not a STOP_TRANSMISSION request. 2407213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell */ 2417213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell if (!mmc_host_is_spi(card->host) 2427213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell || rq_data_dir(req) == READ) 2437213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell brq.mrq.stop = &brq.stop; 244db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King readcmd = MMC_READ_MULTIPLE_BLOCK; 245db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King writecmd = MMC_WRITE_MULTIPLE_BLOCK; 246788ee7b09883515f3a72a8f2a980df5e94f37e2cRussell King } else { 247788ee7b09883515f3a72a8f2a980df5e94f37e2cRussell King brq.mrq.stop = NULL; 248db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King readcmd = MMC_READ_SINGLE_BLOCK; 249db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King writecmd = MMC_WRITE_BLOCK; 250db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King } 251db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King 252db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King if (rq_data_dir(req) == READ) { 253db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King brq.cmd.opcode = readcmd; 254db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King brq.data.flags |= MMC_DATA_READ; 255db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King } else { 256db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King brq.cmd.opcode = writecmd; 257db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King brq.data.flags |= MMC_DATA_WRITE; 258788ee7b09883515f3a72a8f2a980df5e94f37e2cRussell King } 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 260b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossman mmc_set_data_timeout(&brq.data, card); 261b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossman 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds brq.data.sg = mq->sg; 26398ccf14909ba02a41c5925b0b2c92aeeef23d3b9Pierre Ossman brq.data.sg_len = mmc_queue_map_sg(mq); 26498ccf14909ba02a41c5925b0b2c92aeeef23d3b9Pierre Ossman 26598ccf14909ba02a41c5925b0b2c92aeeef23d3b9Pierre Ossman mmc_queue_bounce_pre(mq); 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_wait_for_req(card->host, &brq.mrq); 26898ccf14909ba02a41c5925b0b2c92aeeef23d3b9Pierre Ossman 26998ccf14909ba02a41c5925b0b2c92aeeef23d3b9Pierre Ossman mmc_queue_bounce_post(mq); 27098ccf14909ba02a41c5925b0b2c92aeeef23d3b9Pierre Ossman 271979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman /* 272979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman * Check for errors here, but don't jump to cmd_err 273979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman * until later as we need to wait for the card to leave 274979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman * programming mode even when things go wrong. 275979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman */ 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (brq.cmd.error) { 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "%s: error %d sending read/write command\n", 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->rq_disk->disk_name, brq.cmd.error); 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (brq.data.error) { 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "%s: error %d transferring data\n", 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->rq_disk->disk_name, brq.data.error); 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (brq.stop.error) { 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "%s: error %d sending stop command\n", 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->rq_disk->disk_name, brq.stop.error); 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2917213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) { 2922ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King do { 2932ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King int err; 2942ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King 2952ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King cmd.opcode = MMC_SEND_STATUS; 2962ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King cmd.arg = card->rca << 16; 2972ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 2982ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King err = mmc_wait_for_cmd(card->host, &cmd, 5); 2992ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King if (err) { 3002ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King printk(KERN_ERR "%s: error %d requesting status\n", 3012ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King req->rq_disk->disk_name, err); 3022ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King goto cmd_err; 3032ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King } 304d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman /* 305d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman * Some cards mishandle the status bits, 306d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman * so make sure to check both the busy 307d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman * indication and the card state. 308d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman */ 309d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || 310d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman (R1_CURRENT_STATE(cmd.resp[0]) == 7)); 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if 0 3132ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King if (cmd.resp[0] & ~0x00000900) 3142ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King printk(KERN_ERR "%s: status = %08x\n", 3152ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King req->rq_disk->disk_name, cmd.resp[0]); 3162ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King if (mmc_decode_status(cmd.resp)) 3172ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King goto cmd_err; 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 3192ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King } 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 321979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman if (brq.cmd.error || brq.data.error || brq.stop.error) 322979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman goto cmd_err; 323979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * A block was successfully transferred. 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&md->lock); 328fd539832c7d3a242269374dbcae2cd54da150930Kiyoshi Ueda ret = __blk_end_request(req, 0, brq.data.bytes_xfered); 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&md->lock); 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } while (ret); 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 332b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman mmc_release_host(card->host); 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd_err: 337ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman /* 338ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman * If this is an SD card and we're writing, we can first 339ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman * mark the known good sectors as ok. 340ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman * 341ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman * If the card is not SD, we can still ok written sectors 34223af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman * as reported by the controller (which might be less than 34323af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman * the real number of written sectors, but never more). 344176f00ffed3ef94a198326fbf6a5db64f1cf73adPierre Ossman * 345176f00ffed3ef94a198326fbf6a5db64f1cf73adPierre Ossman * For reads we just fail the entire chunk as that should 346176f00ffed3ef94a198326fbf6a5db64f1cf73adPierre Ossman * be safe in all cases. 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 34823af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman if (rq_data_dir(req) != READ) { 34923af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman if (mmc_card_sd(card)) { 35023af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman u32 blocks; 35123af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman 35223af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman blocks = mmc_sd_num_wr_blocks(card); 35323af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman if (blocks != (u32)-1) { 35423af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman spin_lock_irq(&md->lock); 35508846698703dedae6c6915eb4b4d0a36188c5635Pierre Ossman ret = __blk_end_request(req, 0, blocks << 9); 35623af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman spin_unlock_irq(&md->lock); 35723af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman } 35823af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman } else { 359ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman spin_lock_irq(&md->lock); 36023af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman ret = __blk_end_request(req, 0, brq.data.bytes_xfered); 361ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman spin_unlock_irq(&md->lock); 362ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman } 363176f00ffed3ef94a198326fbf6a5db64f1cf73adPierre Ossman } 364176f00ffed3ef94a198326fbf6a5db64f1cf73adPierre Ossman 365b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman mmc_release_host(card->host); 366ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&md->lock); 368fd539832c7d3a242269374dbcae2cd54da150930Kiyoshi Ueda while (ret) 369fd539832c7d3a242269374dbcae2cd54da150930Kiyoshi Ueda ret = __blk_end_request(req, -EIO, blk_rq_cur_bytes(req)); 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&md->lock); 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 376a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell Kingstatic inline int mmc_blk_readonly(struct mmc_card *card) 377a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King{ 378a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King return mmc_card_readonly(card) || 379a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King !(card->csd.cmdclass & CCC_BLOCK_WRITE); 380a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King} 381a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md; 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int devidx, ret; 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds devidx = find_first_zero_bit(dev_use, MMC_NUM_MINORS); 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (devidx >= MMC_NUM_MINORS) 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-ENOSPC); 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __set_bit(devidx, dev_use); 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 392dd00cc486ab1c17049a535413d1751ef3482141cYoann Padioleau md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); 393a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King if (!md) { 394a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King ret = -ENOMEM; 395a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King goto out; 396a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King } 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 399a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King /* 400a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * Set the read-only status based on the supported commands 401a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * and the write protect switch. 402a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King */ 403a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->read_only = mmc_blk_readonly(card); 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 405a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->disk = alloc_disk(1 << MMC_SHIFT); 406a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King if (md->disk == NULL) { 407a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King ret = -ENOMEM; 408a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King goto err_kfree; 409a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King } 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 411a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King spin_lock_init(&md->lock); 412a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->usage = 1; 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 414a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King ret = mmc_init_queue(&md->queue, card, &md->lock); 415a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King if (ret) 416a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King goto err_putdisk; 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 418a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->queue.issue_fn = mmc_blk_issue_rq; 419a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->queue.data = md; 420d2b18394259ef621fd2a6322aa9934198fd87a6aRussell King 421fe6b4c8840c5e23fe9b8696450cee8f2e8cebffdPierre Ossman md->disk->major = MMC_BLOCK_MAJOR; 422a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->disk->first_minor = devidx << MMC_SHIFT; 423a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->disk->fops = &mmc_bdops; 424a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->disk->private_data = md; 425a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->disk->queue = md->queue.queue; 426a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->disk->driverfs_dev = &card->dev; 427a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King 428a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King /* 429a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * As discussed on lkml, GENHD_FL_REMOVABLE should: 430a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * 431a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * - be set for removable media with permanent block devices 432a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * - be unset for removable block devices with permanent media 433a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * 434a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * Since MMC block devices clearly fall under the second 435a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * case, we do not set GENHD_FL_REMOVABLE. Userspace 436a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * should use the block device creation/destruction hotplug 437a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * messages to tell when the card is present. 438a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King */ 439a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King 440a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King sprintf(md->disk->disk_name, "mmcblk%d", devidx); 441a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King 44208846698703dedae6c6915eb4b4d0a36188c5635Pierre Ossman blk_queue_hardsect_size(md->queue.queue, 512); 443a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King 44485a18ad93ec66888d85758630019b10a84257f3cPierre Ossman if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { 44585a18ad93ec66888d85758630019b10a84257f3cPierre Ossman /* 44685a18ad93ec66888d85758630019b10a84257f3cPierre Ossman * The EXT_CSD sector count is in number or 512 byte 44785a18ad93ec66888d85758630019b10a84257f3cPierre Ossman * sectors. 44885a18ad93ec66888d85758630019b10a84257f3cPierre Ossman */ 44985a18ad93ec66888d85758630019b10a84257f3cPierre Ossman set_capacity(md->disk, card->ext_csd.sectors); 45085a18ad93ec66888d85758630019b10a84257f3cPierre Ossman } else { 45185a18ad93ec66888d85758630019b10a84257f3cPierre Ossman /* 45285a18ad93ec66888d85758630019b10a84257f3cPierre Ossman * The CSD capacity field is in units of read_blkbits. 45385a18ad93ec66888d85758630019b10a84257f3cPierre Ossman * set_capacity takes units of 512 bytes. 45485a18ad93ec66888d85758630019b10a84257f3cPierre Ossman */ 45585a18ad93ec66888d85758630019b10a84257f3cPierre Ossman set_capacity(md->disk, 45685a18ad93ec66888d85758630019b10a84257f3cPierre Ossman card->csd.capacity << (card->csd.read_blkbits - 9)); 45785a18ad93ec66888d85758630019b10a84257f3cPierre Ossman } 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return md; 459a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King 460a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King err_putdisk: 461a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King put_disk(md->disk); 462a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King err_kfree: 463a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King kfree(md); 464a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King out: 465a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King return ERR_PTR(ret); 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_command cmd; 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 474fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale /* Block-addressed cards ignore MMC_SET_BLOCKLEN. */ 475fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale if (mmc_card_blockaddr(card)) 476fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale return 0; 477fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale 478b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman mmc_claim_host(card->host); 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd.opcode = MMC_SET_BLOCKLEN; 48008846698703dedae6c6915eb4b4d0a36188c5635Pierre Ossman cmd.arg = 512; 4817213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = mmc_wait_for_cmd(card->host, &cmd, 5); 483b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman mmc_release_host(card->host); 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) { 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "%s: unable to set block size to %d: %d\n", 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md->disk->disk_name, cmd.arg, err); 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mmc_blk_probe(struct mmc_card *card) 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md; 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 499a7bbb57333447d0cf950992653b6b079585f3531Pierre Ossman char cap_str[10]; 500a7bbb57333447d0cf950992653b6b079585f3531Pierre Ossman 501912490db699d83cb3d03570b63df7448677a3f56Pierre Ossman /* 502912490db699d83cb3d03570b63df7448677a3f56Pierre Ossman * Check that the card supports the command class(es) we need. 503912490db699d83cb3d03570b63df7448677a3f56Pierre Ossman */ 504912490db699d83cb3d03570b63df7448677a3f56Pierre Ossman if (!(card->csd.cmdclass & CCC_BLOCK_READ)) 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md = mmc_blk_alloc(card); 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(md)) 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return PTR_ERR(md); 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = mmc_blk_set_blksize(md, card); 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 515a7bbb57333447d0cf950992653b6b079585f3531Pierre Ossman string_get_size(get_capacity(md->disk) << 9, STRING_UNITS_2, 516a7bbb57333447d0cf950992653b6b079585f3531Pierre Ossman cap_str, sizeof(cap_str)); 517a7bbb57333447d0cf950992653b6b079585f3531Pierre Ossman printk(KERN_INFO "%s: %s %s %s %s\n", 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), 519a7bbb57333447d0cf950992653b6b079585f3531Pierre Ossman cap_str, md->read_only ? "(ro)" : ""); 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_set_drvdata(card, md); 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_disk(md->disk); 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds out: 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_blk_put(md); 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_blk_remove(struct mmc_card *card) 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md = mmc_get_drvdata(card); 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md) { 53689b4e133afea9fce333054b94d89953583a55c19Pierre Ossman /* Stop new requests from getting into the queue */ 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds del_gendisk(md->disk); 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 53989b4e133afea9fce333054b94d89953583a55c19Pierre Ossman /* Then flush out any already in there */ 54089b4e133afea9fce333054b94d89953583a55c19Pierre Ossman mmc_cleanup_queue(&md->queue); 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_blk_put(md); 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_set_drvdata(card, NULL); 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_PM 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mmc_blk_suspend(struct mmc_card *card, pm_message_t state) 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md = mmc_get_drvdata(card); 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md) { 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_queue_suspend(&md->queue); 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mmc_blk_resume(struct mmc_card *card) 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md = mmc_get_drvdata(card); 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md) { 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_blk_set_blksize(md, card); 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_queue_resume(&md->queue); 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define mmc_blk_suspend NULL 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define mmc_blk_resume NULL 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct mmc_driver mmc_driver = { 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .drv = { 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "mmcblk", 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }, 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .probe = mmc_blk_probe, 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .remove = mmc_blk_remove, 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .suspend = mmc_blk_suspend, 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .resume = mmc_blk_resume, 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init mmc_blk_init(void) 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5859d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita int res; 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 587fe6b4c8840c5e23fe9b8696450cee8f2e8cebffdPierre Ossman res = register_blkdev(MMC_BLOCK_MAJOR, "mmc"); 588fe6b4c8840c5e23fe9b8696450cee8f2e8cebffdPierre Ossman if (res) 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5919d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita res = mmc_register_driver(&mmc_driver); 5929d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita if (res) 5939d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita goto out2; 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5959d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita return 0; 5969d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita out2: 5979d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds out: 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return res; 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit mmc_blk_exit(void) 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_unregister_driver(&mmc_driver); 605fe6b4c8840c5e23fe9b8696450cee8f2e8cebffdPierre Ossman unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(mmc_blk_init); 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(mmc_blk_exit); 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_DESCRIPTION("Multimedia Card (MMC) block device driver"); 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 614