From: Saugata Das <saugata....@linaro.org>
This patch adds the support for large sector size of 4KB by disabling emulation.
This patch passes eMMC DATA_SECTOR_SIZE as the logical block size during
mmc_blk_alloc_req.
In order to use this patch for 4KB sector size, ensure that USE_NATIVE_SECTOR
is enabled, partition table is 4KB sector size aligned and file system block
size is 4KB.
Signed-off-by: Saugata Das <saugata....@linaro.org>
---
drivers/mmc/card/block.c | 6 +++++-
drivers/mmc/core/mmc.c | 2 ++
2 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index a7c75d8..0e54118e 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1517,7 +1517,11 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct
mmc_card *card,
snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
"mmcblk%d%s", md->name_idx, subname ? subname : "");
- blk_queue_logical_block_size(md->queue.queue, 512);
+ if (mmc_card_mmc(card))
+ blk_queue_logical_block_size(md->queue.queue,
+ card->ext_csd.data_sector_size);
+ else
+ blk_queue_logical_block_size(md->queue.queue, 512);
set_capacity(md->disk, size);
if (mmc_host_cmd23(card->host)) {
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 02914d6..8dcbe995 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -533,6 +533,8 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8
*ext_csd)
} else {
card->ext_csd.data_tag_unit_size = 0;
}
+ } else {
+ card->ext_csd.data_sector_size = 512;
}
out:
--
1.7.4.3
--
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