block.c revision 83096ebf1263b2c1ee5e653ba37d993d02e3eb7b
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 446b0b62853b2553be375033776902640320970846Andy WhitcroftMODULE_ALIAS("mmc:block"); 456b0b62853b2553be375033776902640320970846Andy Whitcroft 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * max 8 partitions per card 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MMC_SHIFT 3 501dff314451fa24d6b107aa05393d3169e56a7e0aDavid Woodhouse#define MMC_NUM_MINORS (256 >> MMC_SHIFT) 511dff314451fa24d6b107aa05393d3169e56a7e0aDavid Woodhouse 52203c80187eba037f2d6562e0d5847014746726ddBen Collinsstatic DECLARE_BITMAP(dev_use, MMC_NUM_MINORS); 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * There is one mmc_blk_data per slot. 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct mmc_blk_data { 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spinlock_t lock; 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gendisk *disk; 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_queue queue; 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int usage; 63a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King unsigned int read_only; 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 66a621aaed690b9439141c555941b6af53873f6ff1Arjan van de Venstatic DEFINE_MUTEX(open_lock); 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md; 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 72a621aaed690b9439141c555941b6af53873f6ff1Arjan van de Ven mutex_lock(&open_lock); 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md = disk->private_data; 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md && md->usage == 0) 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md = NULL; 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md) 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md->usage++; 78a621aaed690b9439141c555941b6af53873f6ff1Arjan van de Ven mutex_unlock(&open_lock); 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return md; 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_blk_put(struct mmc_blk_data *md) 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 85a621aaed690b9439141c555941b6af53873f6ff1Arjan van de Ven mutex_lock(&open_lock); 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md->usage--; 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md->usage == 0) { 88f331c0296f2a9fee0d396a70598b954062603015Tejun Heo int devidx = MINOR(disk_devt(md->disk)) >> MMC_SHIFT; 891dff314451fa24d6b107aa05393d3169e56a7e0aDavid Woodhouse __clear_bit(devidx, dev_use); 901dff314451fa24d6b107aa05393d3169e56a7e0aDavid Woodhouse 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_disk(md->disk); 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(md); 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 94a621aaed690b9439141c555941b6af53873f6ff1Arjan van de Ven mutex_unlock(&open_lock); 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 97a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Virostatic int mmc_blk_open(struct block_device *bdev, fmode_t mode) 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 99a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Viro struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk); 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = -ENXIO; 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md) { 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md->usage == 2) 104a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Viro check_disk_change(bdev); 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = 0; 106a00fc09029f02ca833cf90e5d5625f08c4ac4f51Pierre Ossman 107a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Viro if ((mode & FMODE_WRITE) && md->read_only) { 10870bb08962ea9bd50797ae9f16b2493f5f7c65053Andrew Morton mmc_blk_put(md); 109a00fc09029f02ca833cf90e5d5625f08c4ac4f51Pierre Ossman ret = -EROFS; 11070bb08962ea9bd50797ae9f16b2493f5f7c65053Andrew Morton } 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 116a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Virostatic int mmc_blk_release(struct gendisk *disk, fmode_t mode) 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 118a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Viro struct mmc_blk_data *md = disk->private_data; 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_blk_put(md); 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 125a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwigmmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 127a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); 128a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig geo->heads = 4; 129a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig geo->sectors = 16; 130a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig return 0; 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct block_device_operations mmc_bdops = { 134a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Viro .open = mmc_blk_open, 135a5a1561f88fe8bfd7fdceed1d942ad494500b8a9Al Viro .release = mmc_blk_release, 136a885c8c4316e1c1d2d2c8755da3f3d14f852528dChristoph Hellwig .getgeo = mmc_blk_getgeo, 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct mmc_blk_request { 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_request mrq; 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_command cmd; 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_command stop; 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_data data; 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 147ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossmanstatic u32 mmc_sd_num_wr_blocks(struct mmc_card *card) 148ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman{ 149ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman int err; 150b7a03210b7b381e06f71751cb9addfae7704489cHarvey Harrison __be32 blocks; 151ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 152ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman struct mmc_request mrq; 153ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman struct mmc_command cmd; 154ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman struct mmc_data data; 155ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman unsigned int timeout_us; 156ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 157ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman struct scatterlist sg; 158ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 159ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman memset(&cmd, 0, sizeof(struct mmc_command)); 160ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 161ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman cmd.opcode = MMC_APP_CMD; 162ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman cmd.arg = card->rca << 16; 1637213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; 164ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 165ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman err = mmc_wait_for_cmd(card->host, &cmd, 0); 1667213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell if (err) 1677213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell return (u32)-1; 1687213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) 169ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman return (u32)-1; 170ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 171ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman memset(&cmd, 0, sizeof(struct mmc_command)); 172ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 173ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; 174ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman cmd.arg = 0; 1757213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; 176ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 177ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman memset(&data, 0, sizeof(struct mmc_data)); 178ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 179ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.timeout_ns = card->csd.tacc_ns * 100; 180ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.timeout_clks = card->csd.tacc_clks * 100; 181ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 182ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman timeout_us = data.timeout_ns / 1000; 183ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman timeout_us += data.timeout_clks * 1000 / 184ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman (card->host->ios.clock / 1000); 185ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 186ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman if (timeout_us > 100000) { 187ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.timeout_ns = 100000000; 188ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.timeout_clks = 0; 189ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman } 190ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 191ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.blksz = 4; 192ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.blocks = 1; 193ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.flags = MMC_DATA_READ; 194ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.sg = &sg; 195ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman data.sg_len = 1; 196ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 197ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman memset(&mrq, 0, sizeof(struct mmc_request)); 198ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 199ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman mrq.cmd = &cmd; 200ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman mrq.data = &data; 201ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 202ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman sg_init_one(&sg, &blocks, 4); 203ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 204ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman mmc_wait_for_req(card->host, &mrq); 205ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 20617b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman if (cmd.error || data.error) 207ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman return (u32)-1; 208ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 209b7a03210b7b381e06f71751cb9addfae7704489cHarvey Harrison return ntohl(blocks); 210ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman} 211ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 212504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunterstatic u32 get_card_status(struct mmc_card *card, struct request *req) 213504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter{ 214504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter struct mmc_command cmd; 215504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter int err; 216504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter 217504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter memset(&cmd, 0, sizeof(struct mmc_command)); 218504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter cmd.opcode = MMC_SEND_STATUS; 219504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter if (!mmc_host_is_spi(card->host)) 220504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter cmd.arg = card->rca << 16; 221504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC; 222504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter err = mmc_wait_for_cmd(card->host, &cmd, 0); 223504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter if (err) 224504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter printk(KERN_ERR "%s: error %d sending status comand", 225504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter req->rq_disk->disk_name, err); 226504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter return cmd.resp[0]; 227504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter} 228504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md = mq->data; 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_card *card = md->queue.card; 233176f00ffed3ef94a198326fbf6a5db64f1cf73adPierre Ossman struct mmc_blk_request brq; 2346a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter int ret = 1, disable_multi = 0; 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 236b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman mmc_claim_host(card->host); 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do { 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_command cmd; 240504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter u32 readcmd, writecmd, status = 0; 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(&brq, 0, sizeof(struct mmc_blk_request)); 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds brq.mrq.cmd = &brq.cmd; 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds brq.mrq.data = &brq.data; 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24683096ebf1263b2c1ee5e653ba37d993d02e3eb7bTejun Heo brq.cmd.arg = blk_rq_pos(req); 247fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale if (!mmc_card_blockaddr(card)) 248fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale brq.cmd.arg <<= 9; 2497213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell brq.cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; 25008846698703dedae6c6915eb4b4d0a36188c5635Pierre Ossman brq.data.blksz = 512; 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds brq.stop.opcode = MMC_STOP_TRANSMISSION; 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds brq.stop.arg = 0; 2537213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell brq.stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; 25483096ebf1263b2c1ee5e653ba37d993d02e3eb7bTejun Heo brq.data.blocks = blk_rq_sectors(req); 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2566a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter /* 2576a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter * After a read error, we redo the request one sector at a time 2586a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter * in order to accurately determine which sectors can be read 2596a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter * successfully. 2606a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter */ 2616a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter if (disable_multi && brq.data.blocks > 1) 2626a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter brq.data.blocks = 1; 2636a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter 264788ee7b09883515f3a72a8f2a980df5e94f37e2cRussell King if (brq.data.blocks > 1) { 2657213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell /* SPI multiblock writes terminate using a special 2667213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell * token, not a STOP_TRANSMISSION request. 2677213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell */ 2687213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell if (!mmc_host_is_spi(card->host) 2697213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell || rq_data_dir(req) == READ) 2707213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell brq.mrq.stop = &brq.stop; 271db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King readcmd = MMC_READ_MULTIPLE_BLOCK; 272db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King writecmd = MMC_WRITE_MULTIPLE_BLOCK; 273788ee7b09883515f3a72a8f2a980df5e94f37e2cRussell King } else { 274788ee7b09883515f3a72a8f2a980df5e94f37e2cRussell King brq.mrq.stop = NULL; 275db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King readcmd = MMC_READ_SINGLE_BLOCK; 276db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King writecmd = MMC_WRITE_BLOCK; 277db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King } 278db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King 279db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King if (rq_data_dir(req) == READ) { 280db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King brq.cmd.opcode = readcmd; 281db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King brq.data.flags |= MMC_DATA_READ; 282db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King } else { 283db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King brq.cmd.opcode = writecmd; 284db53f28b3a6d9338cca1b7e917dc063ac99e1871Russell King brq.data.flags |= MMC_DATA_WRITE; 285788ee7b09883515f3a72a8f2a980df5e94f37e2cRussell King } 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 287b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossman mmc_set_data_timeout(&brq.data, card); 288b146d26a61e0feab2f12a98ae83fd352830899c0Pierre Ossman 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds brq.data.sg = mq->sg; 29098ccf14909ba02a41c5925b0b2c92aeeef23d3b9Pierre Ossman brq.data.sg_len = mmc_queue_map_sg(mq); 29198ccf14909ba02a41c5925b0b2c92aeeef23d3b9Pierre Ossman 2926a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter /* 2936a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter * Adjust the sg list so it is the same size as the 2946a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter * request. 2956a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter */ 29683096ebf1263b2c1ee5e653ba37d993d02e3eb7bTejun Heo if (brq.data.blocks != blk_rq_sectors(req)) { 2976a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter int i, data_size = brq.data.blocks << 9; 2986a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter struct scatterlist *sg; 2996a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter 3006a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter for_each_sg(brq.data.sg, sg, brq.data.sg_len, i) { 3016a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter data_size -= sg->length; 3026a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter if (data_size <= 0) { 3036a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter sg->length += data_size; 3046a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter i++; 3056a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter break; 3066a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter } 3076a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter } 3086a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter brq.data.sg_len = i; 3096a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter } 3106a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter 31198ccf14909ba02a41c5925b0b2c92aeeef23d3b9Pierre Ossman mmc_queue_bounce_pre(mq); 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_wait_for_req(card->host, &brq.mrq); 31498ccf14909ba02a41c5925b0b2c92aeeef23d3b9Pierre Ossman 31598ccf14909ba02a41c5925b0b2c92aeeef23d3b9Pierre Ossman mmc_queue_bounce_post(mq); 31698ccf14909ba02a41c5925b0b2c92aeeef23d3b9Pierre Ossman 317979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman /* 318979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman * Check for errors here, but don't jump to cmd_err 319979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman * until later as we need to wait for the card to leave 320979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman * programming mode even when things go wrong. 321979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman */ 3226a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter if (brq.cmd.error || brq.data.error || brq.stop.error) { 3236a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter if (brq.data.blocks > 1 && rq_data_dir(req) == READ) { 3246a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter /* Redo read one sector at a time */ 3256a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter printk(KERN_WARNING "%s: retrying using single " 3266a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter "block read\n", req->rq_disk->disk_name); 3276a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter disable_multi = 1; 3286a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter continue; 3296a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter } 330504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter status = get_card_status(card, req); 3316a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter } 332504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (brq.cmd.error) { 334504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter printk(KERN_ERR "%s: error %d sending read/write " 335504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter "command, response %#x, card status %#x\n", 336504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter req->rq_disk->disk_name, brq.cmd.error, 337504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter brq.cmd.resp[0], status); 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (brq.data.error) { 341504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter if (brq.data.error == -ETIMEDOUT && brq.mrq.stop) 342504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter /* 'Stop' response contains card status */ 343504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter status = brq.mrq.stop->resp[0]; 344504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter printk(KERN_ERR "%s: error %d transferring data," 345504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter " sector %u, nr %u, card status %#x\n", 346504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter req->rq_disk->disk_name, brq.data.error, 34783096ebf1263b2c1ee5e653ba37d993d02e3eb7bTejun Heo (unsigned)blk_rq_pos(req), 34883096ebf1263b2c1ee5e653ba37d993d02e3eb7bTejun Heo (unsigned)blk_rq_sectors(req), status); 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (brq.stop.error) { 352504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter printk(KERN_ERR "%s: error %d sending stop command, " 353504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter "response %#x, card status %#x\n", 354504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter req->rq_disk->disk_name, brq.stop.error, 355504f191f25b1671802246bac06c9f59f94f0b7deAdrian Hunter brq.stop.resp[0], status); 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3587213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) { 3592ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King do { 3602ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King int err; 3612ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King 3622ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King cmd.opcode = MMC_SEND_STATUS; 3632ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King cmd.arg = card->rca << 16; 3642ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 3652ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King err = mmc_wait_for_cmd(card->host, &cmd, 5); 3662ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King if (err) { 3672ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King printk(KERN_ERR "%s: error %d requesting status\n", 3682ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King req->rq_disk->disk_name, err); 3692ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King goto cmd_err; 3702ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King } 371d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman /* 372d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman * Some cards mishandle the status bits, 373d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman * so make sure to check both the busy 374d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman * indication and the card state. 375d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman */ 376d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || 377d198f101989d9bb950327f0d043f6203bb862343Pierre Ossman (R1_CURRENT_STATE(cmd.resp[0]) == 7)); 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if 0 3802ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King if (cmd.resp[0] & ~0x00000900) 3812ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King printk(KERN_ERR "%s: status = %08x\n", 3822ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King req->rq_disk->disk_name, cmd.resp[0]); 3832ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King if (mmc_decode_status(cmd.resp)) 3842ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King goto cmd_err; 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 3862ed6d22cec37d9a3df4c5bacf1160dee7700106eRussell King } 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3886a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter if (brq.cmd.error || brq.stop.error || brq.data.error) { 3896a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter if (rq_data_dir(req) == READ) { 3906a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter /* 3916a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter * After an error, we redo I/O one sector at a 3926a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter * time, so we only reach here after trying to 3936a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter * read a single sector. 3946a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter */ 3956a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter spin_lock_irq(&md->lock); 3966a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter ret = __blk_end_request(req, -EIO, brq.data.blksz); 3976a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter spin_unlock_irq(&md->lock); 3986a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter continue; 3996a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter } 400979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman goto cmd_err; 4016a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter } 402979ce7208a679b8d012450610d5d5aa75aab3af9Pierre Ossman 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * A block was successfully transferred. 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&md->lock); 407fd539832c7d3a242269374dbcae2cd54da150930Kiyoshi Ueda ret = __blk_end_request(req, 0, brq.data.bytes_xfered); 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&md->lock); 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } while (ret); 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 411b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman mmc_release_host(card->host); 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd_err: 416ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman /* 417ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman * If this is an SD card and we're writing, we can first 418ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman * mark the known good sectors as ok. 419ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman * 420ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman * If the card is not SD, we can still ok written sectors 42123af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman * as reported by the controller (which might be less than 42223af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman * the real number of written sectors, but never more). 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4246a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter if (mmc_card_sd(card)) { 4256a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter u32 blocks; 42623af60398af2f5033e2f53665538a09f498dbc03Pierre Ossman 4276a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter blocks = mmc_sd_num_wr_blocks(card); 4286a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter if (blocks != (u32)-1) { 429ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman spin_lock_irq(&md->lock); 4306a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter ret = __blk_end_request(req, 0, blocks << 9); 431ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman spin_unlock_irq(&md->lock); 432ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman } 4336a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter } else { 4346a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter spin_lock_irq(&md->lock); 4356a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter ret = __blk_end_request(req, 0, brq.data.bytes_xfered); 4366a79e391df295bd7c2aa1309ea5031f361c197fdAdrian Hunter spin_unlock_irq(&md->lock); 437176f00ffed3ef94a198326fbf6a5db64f1cf73adPierre Ossman } 438176f00ffed3ef94a198326fbf6a5db64f1cf73adPierre Ossman 439b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman mmc_release_host(card->host); 440ec5a19dd935eb3793e1f6ed491e8035b3d7b1df9Pierre Ossman 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&md->lock); 442fd539832c7d3a242269374dbcae2cd54da150930Kiyoshi Ueda while (ret) 443fd539832c7d3a242269374dbcae2cd54da150930Kiyoshi Ueda ret = __blk_end_request(req, -EIO, blk_rq_cur_bytes(req)); 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&md->lock); 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 450a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell Kingstatic inline int mmc_blk_readonly(struct mmc_card *card) 451a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King{ 452a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King return mmc_card_readonly(card) || 453a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King !(card->csd.cmdclass & CCC_BLOCK_WRITE); 454a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King} 455a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md; 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int devidx, ret; 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds devidx = find_first_zero_bit(dev_use, MMC_NUM_MINORS); 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (devidx >= MMC_NUM_MINORS) 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ERR_PTR(-ENOSPC); 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __set_bit(devidx, dev_use); 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 466dd00cc486ab1c17049a535413d1751ef3482141cYoann Padioleau md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); 467a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King if (!md) { 468a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King ret = -ENOMEM; 469a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King goto out; 470a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King } 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 473a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King /* 474a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * Set the read-only status based on the supported commands 475a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * and the write protect switch. 476a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King */ 477a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->read_only = mmc_blk_readonly(card); 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 479a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->disk = alloc_disk(1 << MMC_SHIFT); 480a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King if (md->disk == NULL) { 481a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King ret = -ENOMEM; 482a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King goto err_kfree; 483a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King } 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 485a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King spin_lock_init(&md->lock); 486a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->usage = 1; 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 488a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King ret = mmc_init_queue(&md->queue, card, &md->lock); 489a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King if (ret) 490a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King goto err_putdisk; 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 492a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->queue.issue_fn = mmc_blk_issue_rq; 493a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->queue.data = md; 494d2b18394259ef621fd2a6322aa9934198fd87a6aRussell King 495fe6b4c8840c5e23fe9b8696450cee8f2e8cebffdPierre Ossman md->disk->major = MMC_BLOCK_MAJOR; 496a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->disk->first_minor = devidx << MMC_SHIFT; 497a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->disk->fops = &mmc_bdops; 498a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->disk->private_data = md; 499a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->disk->queue = md->queue.queue; 500a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King md->disk->driverfs_dev = &card->dev; 501a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King 502a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King /* 503a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * As discussed on lkml, GENHD_FL_REMOVABLE should: 504a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * 505a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * - be set for removable media with permanent block devices 506a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * - be unset for removable block devices with permanent media 507a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * 508a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * Since MMC block devices clearly fall under the second 509a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * case, we do not set GENHD_FL_REMOVABLE. Userspace 510a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * should use the block device creation/destruction hotplug 511a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King * messages to tell when the card is present. 512a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King */ 513a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King 514a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King sprintf(md->disk->disk_name, "mmcblk%d", devidx); 515a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King 51608846698703dedae6c6915eb4b4d0a36188c5635Pierre Ossman blk_queue_hardsect_size(md->queue.queue, 512); 517a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King 51885a18ad93ec66888d85758630019b10a84257f3cPierre Ossman if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { 51985a18ad93ec66888d85758630019b10a84257f3cPierre Ossman /* 52085a18ad93ec66888d85758630019b10a84257f3cPierre Ossman * The EXT_CSD sector count is in number or 512 byte 52185a18ad93ec66888d85758630019b10a84257f3cPierre Ossman * sectors. 52285a18ad93ec66888d85758630019b10a84257f3cPierre Ossman */ 52385a18ad93ec66888d85758630019b10a84257f3cPierre Ossman set_capacity(md->disk, card->ext_csd.sectors); 52485a18ad93ec66888d85758630019b10a84257f3cPierre Ossman } else { 52585a18ad93ec66888d85758630019b10a84257f3cPierre Ossman /* 52685a18ad93ec66888d85758630019b10a84257f3cPierre Ossman * The CSD capacity field is in units of read_blkbits. 52785a18ad93ec66888d85758630019b10a84257f3cPierre Ossman * set_capacity takes units of 512 bytes. 52885a18ad93ec66888d85758630019b10a84257f3cPierre Ossman */ 52985a18ad93ec66888d85758630019b10a84257f3cPierre Ossman set_capacity(md->disk, 53085a18ad93ec66888d85758630019b10a84257f3cPierre Ossman card->csd.capacity << (card->csd.read_blkbits - 9)); 53185a18ad93ec66888d85758630019b10a84257f3cPierre Ossman } 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return md; 533a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King 534a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King err_putdisk: 535a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King put_disk(md->disk); 536a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King err_kfree: 537a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King kfree(md); 538a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King out: 539a6f6c96b65d7f65a7a7bf5cbe874eda182a6b2ccRussell King return ERR_PTR(ret); 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_command cmd; 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 548fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale /* Block-addressed cards ignore MMC_SET_BLOCKLEN. */ 549fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale if (mmc_card_blockaddr(card)) 550fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale return 0; 551fba68bd2dab1ac99af3c5a963ec9581cfa9f1725Philip Langdale 552b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman mmc_claim_host(card->host); 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd.opcode = MMC_SET_BLOCKLEN; 55408846698703dedae6c6915eb4b4d0a36188c5635Pierre Ossman cmd.arg = 512; 5557213d175e3b6f6db60f843b72e88857a350e146aDavid Brownell cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = mmc_wait_for_cmd(card->host, &cmd, 5); 557b855885e3b60cf6f9452848712a62517b94583ebPierre Ossman mmc_release_host(card->host); 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) { 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "%s: unable to set block size to %d: %d\n", 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md->disk->disk_name, cmd.arg, err); 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mmc_blk_probe(struct mmc_card *card) 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md; 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 573a7bbb57333447d0cf950992653b6b079585f3531Pierre Ossman char cap_str[10]; 574a7bbb57333447d0cf950992653b6b079585f3531Pierre Ossman 575912490db699d83cb3d03570b63df7448677a3f56Pierre Ossman /* 576912490db699d83cb3d03570b63df7448677a3f56Pierre Ossman * Check that the card supports the command class(es) we need. 577912490db699d83cb3d03570b63df7448677a3f56Pierre Ossman */ 578912490db699d83cb3d03570b63df7448677a3f56Pierre Ossman if (!(card->csd.cmdclass & CCC_BLOCK_READ)) 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md = mmc_blk_alloc(card); 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(md)) 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return PTR_ERR(md); 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = mmc_blk_set_blksize(md, card); 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 589444122fd58fdc83c96877a92b3f6288cafddb08dYi Li string_get_size((u64)get_capacity(md->disk) << 9, STRING_UNITS_2, 590a7bbb57333447d0cf950992653b6b079585f3531Pierre Ossman cap_str, sizeof(cap_str)); 591a7bbb57333447d0cf950992653b6b079585f3531Pierre Ossman printk(KERN_INFO "%s: %s %s %s %s\n", 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), 593a7bbb57333447d0cf950992653b6b079585f3531Pierre Ossman cap_str, md->read_only ? "(ro)" : ""); 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_set_drvdata(card, md); 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_disk(md->disk); 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds out: 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_blk_put(md); 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mmc_blk_remove(struct mmc_card *card) 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md = mmc_get_drvdata(card); 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md) { 61089b4e133afea9fce333054b94d89953583a55c19Pierre Ossman /* Stop new requests from getting into the queue */ 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds del_gendisk(md->disk); 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 61389b4e133afea9fce333054b94d89953583a55c19Pierre Ossman /* Then flush out any already in there */ 61489b4e133afea9fce333054b94d89953583a55c19Pierre Ossman mmc_cleanup_queue(&md->queue); 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_blk_put(md); 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_set_drvdata(card, NULL); 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_PM 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mmc_blk_suspend(struct mmc_card *card, pm_message_t state) 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md = mmc_get_drvdata(card); 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md) { 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_queue_suspend(&md->queue); 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mmc_blk_resume(struct mmc_card *card) 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mmc_blk_data *md = mmc_get_drvdata(card); 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (md) { 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_blk_set_blksize(md, card); 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_queue_resume(&md->queue); 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define mmc_blk_suspend NULL 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define mmc_blk_resume NULL 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct mmc_driver mmc_driver = { 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .drv = { 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "mmcblk", 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }, 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .probe = mmc_blk_probe, 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .remove = mmc_blk_remove, 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .suspend = mmc_blk_suspend, 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .resume = mmc_blk_resume, 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init mmc_blk_init(void) 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6599d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita int res; 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 661fe6b4c8840c5e23fe9b8696450cee8f2e8cebffdPierre Ossman res = register_blkdev(MMC_BLOCK_MAJOR, "mmc"); 662fe6b4c8840c5e23fe9b8696450cee8f2e8cebffdPierre Ossman if (res) 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6659d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita res = mmc_register_driver(&mmc_driver); 6669d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita if (res) 6679d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita goto out2; 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6699d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita return 0; 6709d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita out2: 6719d4e98e9609bc19d4a8ac4a5c3218358d1820114Akinobu Mita unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds out: 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return res; 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit mmc_blk_exit(void) 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mmc_unregister_driver(&mmc_driver); 679fe6b4c8840c5e23fe9b8696450cee8f2e8cebffdPierre Ossman unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(mmc_blk_init); 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(mmc_blk_exit); 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_DESCRIPTION("Multimedia Card (MMC) block device driver"); 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 688