From patchwork Mon Apr 4 12:22:00 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrei Warkentin X-Patchwork-Id: 685061 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p34BgVk1020028 for ; Mon, 4 Apr 2011 11:42:35 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753629Ab1DDLmF (ORCPT ); Mon, 4 Apr 2011 07:42:05 -0400 Received: from exprod5og113.obsmtp.com ([64.18.0.26]:59538 "EHLO exprod5og113.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753363Ab1DDLmC (ORCPT ); Mon, 4 Apr 2011 07:42:02 -0400 Received: from source ([144.188.21.13]) (using TLSv1) by exprod5ob113.postini.com ([64.18.4.12]) with SMTP ID DSNKTZmuifrkoVyoXiuvBfdORpy+LeEA4eaG@postini.com; Mon, 04 Apr 2011 04:42:01 PDT Received: from il93mgrg01.am.mot-mobility.com ([10.22.94.168]) by il93mgrg01.am.mot-mobility.com (8.14.3/8.14.3) with ESMTP id p34BeJXG022997 for ; Mon, 4 Apr 2011 07:40:19 -0400 (EDT) Received: from mail-gx0-f170.google.com (mail-gx0-f170.google.com [209.85.161.170]) by il93mgrg01.am.mot-mobility.com (8.14.3/8.14.3) with ESMTP id p34BeIq5022977 (version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=OK) for ; Mon, 4 Apr 2011 07:40:19 -0400 (EDT) Received: by gxk27 with SMTP id 27so3135885gxk.15 for ; Mon, 04 Apr 2011 04:41:59 -0700 (PDT) Received: by 10.236.175.8 with SMTP id y8mr95622yhl.228.1301917319682; Mon, 04 Apr 2011 04:41:59 -0700 (PDT) Received: from localhost.localdomain (dyngate-ca119-13.motorola.com [144.189.96.13]) by mx.google.com with ESMTPS id u29sm2247760yhn.70.2011.04.04.04.41.56 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 04 Apr 2011 04:41:57 -0700 (PDT) From: Andrei Warkentin To: linux-mmc@vger.kernel.org Cc: Andrei Warkentin Subject: [PATCH] MMC: MMC boot partitions support. Date: Mon, 4 Apr 2011 07:22:00 -0500 Message-Id: <1301919720-8511-1-git-send-email-andreiw@motorola.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: References: X-CFilter-Loop: Reflected Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Mon, 04 Apr 2011 11:43:00 +0000 (UTC) Allows device MMC boot partitions to be accessed. MMC partitions are treated effectively as separate block devices on the same MMC card. Signed-off-by: Andrei Warkentin --- Documentation/mmc/00-INDEX | 2 + Documentation/mmc/mmc-dev-attrs.txt | 10 ++ Documentation/mmc/mmc-dev-parts.txt | 26 +++ drivers/mmc/card/block.c | 305 +++++++++++++++++++++++++++++------ drivers/mmc/core/mmc.c | 35 +++-- drivers/mmc/core/mmc_ops.c | 16 ++- drivers/mmc/core/mmc_ops.h | 1 - include/linux/mmc/card.h | 4 +- include/linux/mmc/core.h | 1 + include/linux/mmc/mmc.h | 8 +- 10 files changed, 341 insertions(+), 67 deletions(-) create mode 100644 Documentation/mmc/mmc-dev-parts.txt diff --git a/Documentation/mmc/00-INDEX b/Documentation/mmc/00-INDEX index fca586f..93dd7a7 100644 --- a/Documentation/mmc/00-INDEX +++ b/Documentation/mmc/00-INDEX @@ -2,3 +2,5 @@ - this file mmc-dev-attrs.txt - info on SD and MMC device attributes +mmc-dev-parts.txt + - info on SD and MMC device partitions diff --git a/Documentation/mmc/mmc-dev-attrs.txt b/Documentation/mmc/mmc-dev-attrs.txt index ff2bd68..4eecc85 100644 --- a/Documentation/mmc/mmc-dev-attrs.txt +++ b/Documentation/mmc/mmc-dev-attrs.txt @@ -1,3 +1,13 @@ +SD and MMC Block Device Attributes +================================== + +These attributes are defined for the block devices associated with the +SD or MMC device. + +The following attributes are read/write. + + force_ro Enforce read-only access even if write protect switch is off. + SD and MMC Device Attributes ============================ diff --git a/Documentation/mmc/mmc-dev-parts.txt b/Documentation/mmc/mmc-dev-parts.txt new file mode 100644 index 0000000..8821909 --- /dev/null +++ b/Documentation/mmc/mmc-dev-parts.txt @@ -0,0 +1,26 @@ +SD and MMC Device Partitions +============================ + +Device partitions are additional logical block devices present +on the SD/MMC device. + +As of this writing, MMC boot partitions as supported and exposed as +/dev/mmcblkXboot0 and /dev/mmcblkXboot1, where X is the index of the +parent /dev/mmcblkX. + +MMC Boot Partitions +=================== + +Read and write access is provided to the two MMC boot partitions. Due +to the sensitive nature of the boot partition contents, which often store +a bootloader or bootloader configuration tables crucial to booting the platform, +write access is by default disabled to reduce the chance of accidental bricking. + +To enable write access to /dev/mmcblkXbootY, disable the forced read-only +access: + +echo 0 > /sys/block/mmcblkXbootY/force_ro + +To re-enable read-only access: + +echo 1 > /sys/block/mmcblkXbootY/force_ro diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 91a6767..ee8f7a9 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -76,9 +76,19 @@ struct mmc_blk_data { spinlock_t lock; struct gendisk *disk; struct mmc_queue queue; + struct list_head part; unsigned int usage; unsigned int read_only; + unsigned int part_type; + + /* + * Only set in main mmc_blk_data associated + * with mmc_card with mmc_set_drvdata, and keeps + * track of the current selected device partition. + */ + unsigned int part_curr; + struct device_attribute force_ro; }; static DEFINE_MUTEX(open_lock); @@ -101,17 +111,22 @@ static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) return md; } +static int mmc_get_devidx(struct gendisk *disk) +{ + int devmaj = MAJOR(disk_devt(disk)); + int devidx = MINOR(disk_devt(disk)) / perdev_minors; + + if (!devmaj) + devidx = disk->first_minor / perdev_minors; + return devidx; +} + static void mmc_blk_put(struct mmc_blk_data *md) { mutex_lock(&open_lock); md->usage--; if (md->usage == 0) { - int devmaj = MAJOR(disk_devt(md->disk)); - int devidx = MINOR(disk_devt(md->disk)) / perdev_minors; - - if (!devmaj) - devidx = md->disk->first_minor / perdev_minors; - + int devidx = mmc_get_devidx(md->disk); blk_cleanup_queue(md->queue.queue); __clear_bit(devidx, dev_use); @@ -122,6 +137,38 @@ static void mmc_blk_put(struct mmc_blk_data *md) mutex_unlock(&open_lock); } +static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + int ret; + struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); + + ret = snprintf(buf, PAGE_SIZE, "%d", + get_disk_ro(dev_to_disk(dev)) ^ + md->read_only); + mmc_blk_put(md); + return ret; +} + +static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + int ret; + char *end; + struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); + unsigned long set = simple_strtoul(buf, &end, 0); + if (end == buf) { + ret = -EINVAL; + goto out; + } + + set_disk_ro(dev_to_disk(dev), set || md->read_only); + ret = count; +out: + mmc_blk_put(md); + return ret; +} + static int mmc_blk_open(struct block_device *bdev, fmode_t mode) { struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk); @@ -176,6 +223,29 @@ struct mmc_blk_request { struct mmc_data data; }; +static inline int mmc_blk_part_switch(struct mmc_card *card, + struct mmc_blk_data *md) +{ + int ret; + struct mmc_blk_data *main_md = mmc_get_drvdata(card); + if (main_md->part_curr == md->part_type) + return 0; + + if (mmc_card_mmc(card)) { + card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; + card->ext_csd.part_config |= md->part_type; + + ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_PART_CONFIG, card->ext_csd.part_config, + card->ext_csd.part_time); + if (ret) + return ret; +} + + main_md->part_curr = md->part_type; + return 0; +} + static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) { int err; @@ -273,8 +343,6 @@ static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) unsigned int from, nr, arg; int err = 0; - mmc_claim_host(card->host); - if (!mmc_can_erase(card)) { err = -EOPNOTSUPP; goto out; @@ -294,8 +362,6 @@ out: __blk_end_request(req, err, blk_rq_bytes(req)); spin_unlock_irq(&md->lock); - mmc_release_host(card->host); - return err ? 0 : 1; } @@ -307,8 +373,6 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, unsigned int from, nr, arg; int err = 0; - mmc_claim_host(card->host); - if (!mmc_can_secure_erase_trim(card)) { err = -EOPNOTSUPP; goto out; @@ -330,8 +394,6 @@ out: __blk_end_request(req, err, blk_rq_bytes(req)); spin_unlock_irq(&md->lock); - mmc_release_host(card->host); - return err ? 0 : 1; } @@ -402,8 +464,6 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) (rq_data_dir(req) == WRITE) && REL_WRITES_SUPPORTED(card); - mmc_claim_host(card->host); - do { struct mmc_command cmd; u32 readcmd, writecmd, status = 0; @@ -589,8 +649,6 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) spin_unlock_irq(&md->lock); } while (ret); - mmc_release_host(card->host); - return 1; cmd_err: @@ -617,8 +675,6 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) spin_unlock_irq(&md->lock); } - mmc_release_host(card->host); - spin_lock_irq(&md->lock); while (ret) ret = __blk_end_request(req, -EIO, blk_rq_cur_bytes(req)); @@ -629,16 +685,31 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) { + int ret; + struct mmc_blk_data *md = mq->data; + struct mmc_card *card = md->queue.card; + + mmc_claim_host(card->host); + ret = mmc_blk_part_switch(card, md); + if (ret) { + ret = 0; + goto out; + } + if (req->cmd_flags & REQ_DISCARD) { if (req->cmd_flags & REQ_SECURE) - return mmc_blk_issue_secdiscard_rq(mq, req); + ret = mmc_blk_issue_secdiscard_rq(mq, req); else - return mmc_blk_issue_discard_rq(mq, req); + ret = mmc_blk_issue_discard_rq(mq, req); } else if (req->cmd_flags & REQ_FLUSH) { - return mmc_blk_issue_flush(mq, req); + ret = mmc_blk_issue_flush(mq, req); } else { - return mmc_blk_issue_rw_rq(mq, req); + ret = mmc_blk_issue_rw_rq(mq, req); } + +out: + mmc_release_host(card->host); + return ret; } static inline int mmc_blk_readonly(struct mmc_card *card) @@ -647,7 +718,11 @@ static inline int mmc_blk_readonly(struct mmc_card *card) !(card->csd.cmdclass & CCC_BLOCK_WRITE); } -static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) +static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, + struct device *parent, + sector_t size, + bool default_ro, + const char *subname) { struct mmc_blk_data *md; int devidx, ret; @@ -663,7 +738,6 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) goto out; } - /* * Set the read-only status based on the supported commands * and the write protect switch. @@ -677,6 +751,7 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) } spin_lock_init(&md->lock); + INIT_LIST_HEAD(&md->part); md->usage = 1; ret = mmc_init_queue(&md->queue, card, &md->lock); @@ -691,8 +766,8 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) md->disk->fops = &mmc_bdops; md->disk->private_data = md; md->disk->queue = md->queue.queue; - md->disk->driverfs_dev = &card->dev; - set_disk_ro(md->disk, md->read_only); + md->disk->driverfs_dev = parent; + set_disk_ro(md->disk, md->read_only || default_ro); if (REL_WRITES_SUPPORTED(card)) blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA); @@ -708,33 +783,97 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) * messages to tell when the card is present. */ - snprintf(md->disk->disk_name, sizeof(md->disk->disk_name), - "mmcblk%d", devidx); + if (subname) + snprintf(md->disk->disk_name, sizeof(md->disk->disk_name), + "mmcblk%d%s", + mmc_get_devidx(dev_to_disk(parent)), subname); + else + snprintf(md->disk->disk_name, sizeof(md->disk->disk_name), + "mmcblk%d", devidx); blk_queue_logical_block_size(md->queue.queue, 512); + set_capacity(md->disk, size); + return md; + + err_putdisk: + put_disk(md->disk); + err_kfree: + kfree(md); + out: + return ERR_PTR(ret); +} + +static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) +{ + sector_t size; + struct mmc_blk_data *md; if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { /* * The EXT_CSD sector count is in number or 512 byte * sectors. */ - set_capacity(md->disk, card->ext_csd.sectors); + size = card->ext_csd.sectors; } else { /* * The CSD capacity field is in units of read_blkbits. * set_capacity takes units of 512 bytes. */ - set_capacity(md->disk, - card->csd.capacity << (card->csd.read_blkbits - 9)); + size = card->csd.capacity << (card->csd.read_blkbits - 9); } + + md = mmc_blk_alloc_req(card, &card->dev, size, false, NULL); return md; +} - err_putdisk: - put_disk(md->disk); - err_kfree: - kfree(md); - out: - return ERR_PTR(ret); +static int mmc_blk_alloc_part(struct mmc_card *card, + struct mmc_blk_data *md, + unsigned int part_type, + sector_t size, + bool default_ro, + const char *subname) +{ + char cap_str[10]; + struct mmc_blk_data *part_md; + + part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro, + subname); + if (IS_ERR(part_md)) + return PTR_ERR(part_md); + part_md->part_type = part_type; + list_add(&part_md->part, &md->part); + + string_get_size((u64)get_capacity(part_md->disk) << 9, STRING_UNITS_2, + cap_str, sizeof(cap_str)); + printk(KERN_INFO "%s: %s %s partition %u %s\n", + part_md->disk->disk_name, mmc_card_id(card), + mmc_card_name(card), part_md->part_type, cap_str); + return 0; +} + +static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md) +{ + int ret = 0; + + if (!mmc_card_mmc(card)) + return 0; + + if (card->ext_csd.boot_size) { + ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT0, + card->ext_csd.boot_size >> 9, + true, + "boot0"); + if (ret) + return ret; + ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT1, + card->ext_csd.boot_size >> 9, + true, + "boot1"); + if (ret) + return ret; + } + + return ret; } static int @@ -755,9 +894,54 @@ mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) return 0; } +static void mmc_blk_remove_req(struct mmc_blk_data *md) +{ + if (md) { + if (md->disk->flags & GENHD_FL_UP) { + device_remove_file(disk_to_dev(md->disk), &md->force_ro); + + /* Stop new requests from getting into the queue */ + del_gendisk(md->disk); + } + + /* Then flush out any already in there */ + mmc_cleanup_queue(&md->queue); + mmc_blk_put(md); + } +} + +static void mmc_blk_remove_parts(struct mmc_card *card, + struct mmc_blk_data *md) +{ + struct list_head *pos, *q; + struct mmc_blk_data *part_md; + + list_for_each_safe(pos, q, &md->part) { + part_md = list_entry(pos, struct mmc_blk_data, part); + list_del(pos); + mmc_blk_remove_req(part_md); + } +} + +static int mmc_add_disk(struct mmc_blk_data *md) +{ + int ret; + + add_disk(md->disk); + md->force_ro.show = force_ro_show; + md->force_ro.store = force_ro_store; + md->force_ro.attr.name = "force_ro"; + md->force_ro.attr.mode = S_IRUGO | S_IWUSR; + ret = device_create_file(disk_to_dev(md->disk), &md->force_ro); + if (ret) + del_gendisk(md->disk); + + return ret; +} + static int mmc_blk_probe(struct mmc_card *card) { - struct mmc_blk_data *md; + struct mmc_blk_data *md, *part_md; int err; char cap_str[10]; @@ -781,14 +965,22 @@ static int mmc_blk_probe(struct mmc_card *card) md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), cap_str, md->read_only ? "(ro)" : ""); + if (mmc_blk_alloc_parts(card, md)) + goto out; + mmc_set_drvdata(card, md); - add_disk(md->disk); + if (mmc_add_disk(md)) + goto out; + + list_for_each_entry(part_md, &md->part, part) { + if (mmc_add_disk(part_md)) + goto out; + } return 0; out: - mmc_cleanup_queue(&md->queue); - mmc_blk_put(md); - + mmc_blk_remove_parts(card, md); + mmc_blk_remove_req(md); return err; } @@ -796,36 +988,43 @@ static void mmc_blk_remove(struct mmc_card *card) { struct mmc_blk_data *md = mmc_get_drvdata(card); - if (md) { - /* Stop new requests from getting into the queue */ - del_gendisk(md->disk); - - /* Then flush out any already in there */ - mmc_cleanup_queue(&md->queue); - - mmc_blk_put(md); - } + mmc_blk_remove_parts(card, md); + mmc_blk_remove_req(md); mmc_set_drvdata(card, NULL); } #ifdef CONFIG_PM static int mmc_blk_suspend(struct mmc_card *card, pm_message_t state) { + struct mmc_blk_data *part_md; struct mmc_blk_data *md = mmc_get_drvdata(card); if (md) { mmc_queue_suspend(&md->queue); + list_for_each_entry(part_md, &md->part, part) { + mmc_queue_suspend(&part_md->queue); + } } return 0; } static int mmc_blk_resume(struct mmc_card *card) { + struct mmc_blk_data *part_md; struct mmc_blk_data *md = mmc_get_drvdata(card); if (md) { mmc_blk_set_blksize(md, card); + + /* + * Resume involves the card going into idle state, + * so current partition is always the main one. + */ + md->part_curr = md->part_type; mmc_queue_resume(&md->queue); + list_for_each_entry(part_md, &md->part, part) { + mmc_queue_resume(&part_md->queue); + } } return 0; } diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index caba751..af4d076 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -288,7 +288,10 @@ static int mmc_read_ext_csd(struct mmc_card *card) if (card->ext_csd.rev >= 3) { u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; - card->ext_csd.bootconfig = ext_csd[EXT_CSD_BOOT_CONFIG]; + card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG]; + + /* EXT_CSD value is in units of 10ms, but we store in ms */ + card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME]; /* Sleep / awake timeout in 100ns units */ if (sa_shift > 0 && sa_shift <= 0x17) @@ -302,6 +305,12 @@ static int mmc_read_ext_csd(struct mmc_card *card) ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10; card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C]; + + /* + * There are two boot regions of equal size, defined in + * multiples of 128K. + */ + card->ext_csd.boot_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; } if (card->ext_csd.rev >= 4) { @@ -548,7 +557,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, */ if (card->ext_csd.enhanced_area_en) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_ERASE_GROUP_DEF, 1); + EXT_CSD_ERASE_GROUP_DEF, 1, + 0); if (err && err != -EBADMSG) goto free_card; @@ -576,10 +586,13 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, /* * Ensure eMMC user default partition is enabled */ - if (card->ext_csd.bootconfig & 0x7) { - card->ext_csd.bootconfig &= ~0x7; - mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_CONFIG, - card->ext_csd.bootconfig); + if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) { + card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, + card->ext_csd.part_config, + card->ext_csd.part_time); + if (err && err != -EBADMSG) + goto free_card; } /* @@ -588,7 +601,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, if ((card->ext_csd.hs_max_dtr != 0) && (host->caps & MMC_CAP_MMC_HIGHSPEED)) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_HS_TIMING, 1); + EXT_CSD_HS_TIMING, 1, 0); if (err && err != -EBADMSG) goto free_card; @@ -655,7 +668,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, ddr = 0; /* no DDR for 1-bit width */ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, - ext_csd_bits[idx][0]); + ext_csd_bits[idx][0], + 0); if (!err) { mmc_set_bus_width_ddr(card->host, bus_width, MMC_SDR_MODE); @@ -674,8 +688,9 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, if (!err && ddr) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_BUS_WIDTH, - ext_csd_bits[idx][1]); + EXT_CSD_BUS_WIDTH, + ext_csd_bits[idx][1], + 0); } if (err) { printk(KERN_WARNING "%s: switch to bus width %d ddr %d " diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index 60842f8..6c77212 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -387,7 +387,18 @@ int mmc_spi_set_crc(struct mmc_host *host, int use_crc) return err; } -int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value) +/** + * mmc_switch - modify EXT_CSD register + * @card: the MMC card associated with the data transfer + * @set: cmd set values + * @index: EXT_CSD register index + * @value: value to program into EXT_CSD register + * @timeout: timeout for operation performed by register write + * + * Modifies the EXT_CSD register for selected card. + */ +int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value, + unsigned int timeout) { int err; struct mmc_command cmd; @@ -404,6 +415,7 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value) (value << 8) | set; cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; + cmd.cmd_timeout = timeout; err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); if (err) @@ -434,6 +446,8 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value) return 0; } +EXPORT_SYMBOL(mmc_switch); + int mmc_send_status(struct mmc_card *card, u32 *status) { int err; diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h index e6d44b8..9276946 100644 --- a/drivers/mmc/core/mmc_ops.h +++ b/drivers/mmc/core/mmc_ops.h @@ -20,7 +20,6 @@ int mmc_all_send_cid(struct mmc_host *host, u32 *cid); int mmc_set_relative_addr(struct mmc_card *card); int mmc_send_csd(struct mmc_card *card, u32 *csd); int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd); -int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value); int mmc_send_status(struct mmc_card *card, u32 *status); int mmc_send_cid(struct mmc_host *host, u32 *cid); int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp); diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index c4e96fa..b90cacc 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -47,7 +47,8 @@ struct mmc_ext_csd { u8 sec_feature_support; u8 rel_sectors; u8 rel_param; - u8 bootconfig; + u8 part_config; + unsigned int part_time; /* Units: ms */ unsigned int sa_timeout; /* Units: 100ns */ unsigned int hs_max_dtr; unsigned int sectors; @@ -60,6 +61,7 @@ struct mmc_ext_csd { bool enhanced_area_en; /* enable bit */ unsigned long long enhanced_area_offset; /* Units: Byte */ unsigned int enhanced_area_size; /* Units: KB */ + unsigned int boot_size; /* in bytes */ }; struct sd_scr { diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index a7d7da7..6d4f3df 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -135,6 +135,7 @@ extern void mmc_wait_for_req(struct mmc_host *, struct mmc_request *); extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int); extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *, struct mmc_command *, int); +extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int); #define MMC_ERASE_ARG 0x00000000 #define MMC_SECURE_ERASE_ARG 0x80000000 diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index 390aa6e..373b2bf 100644 --- a/include/linux/mmc/mmc.h +++ b/include/linux/mmc/mmc.h @@ -257,19 +257,21 @@ struct _mmc_csd { #define EXT_CSD_PARTITION_SUPPORT 160 /* RO */ #define EXT_CSD_WR_REL_PARAM 166 /* RO */ #define EXT_CSD_ERASE_GROUP_DEF 175 /* R/W */ -#define EXT_CSD_BOOT_CONFIG 179 /* R/W */ +#define EXT_CSD_PART_CONFIG 179 /* R/W */ #define EXT_CSD_ERASED_MEM_CONT 181 /* RO */ #define EXT_CSD_BUS_WIDTH 183 /* R/W */ #define EXT_CSD_HS_TIMING 185 /* R/W */ #define EXT_CSD_REV 192 /* RO */ #define EXT_CSD_STRUCTURE 194 /* RO */ #define EXT_CSD_CARD_TYPE 196 /* RO */ +#define EXT_CSD_PART_SWITCH_TIME 199 /* RO */ #define EXT_CSD_SEC_CNT 212 /* RO, 4 bytes */ #define EXT_CSD_S_A_TIMEOUT 217 /* RO */ #define EXT_CSD_REL_WR_SEC_C 222 /* RO */ #define EXT_CSD_HC_WP_GRP_SIZE 221 /* RO */ #define EXT_CSD_ERASE_TIMEOUT_MULT 223 /* RO */ #define EXT_CSD_HC_ERASE_GRP_SIZE 224 /* RO */ +#define EXT_CSD_BOOT_MULT 226 /* RO */ #define EXT_CSD_SEC_TRIM_MULT 229 /* RO */ #define EXT_CSD_SEC_ERASE_MULT 230 /* RO */ #define EXT_CSD_SEC_FEATURE_SUPPORT 231 /* RO */ @@ -281,6 +283,10 @@ struct _mmc_csd { #define EXT_CSD_WR_REL_PARAM_EN (1<<2) +#define EXT_CSD_PART_CONFIG_ACC_MASK (0x7) +#define EXT_CSD_PART_CONFIG_ACC_BOOT0 (0x1) +#define EXT_CSD_PART_CONFIG_ACC_BOOT1 (0x2) + #define EXT_CSD_CMD_SET_NORMAL (1<<0) #define EXT_CSD_CMD_SET_SECURE (1<<1) #define EXT_CSD_CMD_SET_CPSECURE (1<<2)