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| author | Pierre Ossman <drzeus@drzeus.cx> | 2007-02-17 22:15:27 +0100 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2007-05-01 13:04:15 +0200 |
| commit | 85a18ad93ec66888d85758630019b10a84257f3c (patch) | |
| tree | 46b1b7f72a8d4baac51916ca4ea09884ed043822 /drivers/mmc/mmc_block.c | |
| parent | de85989511f3a0e15b04d18582b23d428d6ddbbd (diff) | |
| download | lwn-85a18ad93ec66888d85758630019b10a84257f3c.tar.gz lwn-85a18ad93ec66888d85758630019b10a84257f3c.zip | |
mmc: MMC sector based cards
Support for MMC 4.2 sector based cards. This tweaks the init a
bit and reads a new field out of the EXT_CSD.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/mmc_block.c')
| -rw-r--r-- | drivers/mmc/mmc_block.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/mmc/mmc_block.c b/drivers/mmc/mmc_block.c index 95b0da6abe87..63fbde8756ac 100644 --- a/drivers/mmc/mmc_block.c +++ b/drivers/mmc/mmc_block.c @@ -491,11 +491,20 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits); - /* - * 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)); + 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); + } 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)); + } return md; err_putdisk: |