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mmc_block: hard code 512 byte block size 

We use 512 byte blocks on all cards, and newer cards support nothing
else, so hard code it and make the code less complex.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Pierre Ossman 2008-08-31 14:10:08 +02:00
parent a4b7619377
commit 0884669870
1 changed files with 5 additions and 18 deletions
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23
drivers/mmc/card/block.c
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@ -57,7 +57,6 @@ struct mmc_blk_data {
struct mmc_queue queue;
unsigned int usage;
unsigned int block_bits;
unsigned int read_only;
};
@ -231,11 +230,11 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
if (!mmc_card_blockaddr(card))
brq.cmd.arg <<= 9;
brq.cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
brq.data.blksz = 1 << md->block_bits;
brq.data.blksz = 512;
brq.stop.opcode = MMC_STOP_TRANSMISSION;
brq.stop.arg = 0;
brq.stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
brq.data.blocks = req->nr_sectors >> (md->block_bits - 9);
brq.data.blocks = req->nr_sectors;
if (brq.data.blocks > 1) {
/* SPI multiblock writes terminate using a special
@ -351,16 +350,11 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
if (rq_data_dir(req) != READ) {
if (mmc_card_sd(card)) {
u32 blocks;
unsigned int bytes;
blocks = mmc_sd_num_wr_blocks(card);
if (blocks != (u32)-1) {
if (card->csd.write_partial)
bytes = blocks << md->block_bits;
else
bytes = blocks << 9;
spin_lock_irq(&md->lock);
ret = __blk_end_request(req, 0, bytes);
ret = __blk_end_request(req, 0, blocks << 9);
spin_unlock_irq(&md->lock);
}
} else {
@ -410,13 +404,6 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
*/
md->read_only = mmc_blk_readonly(card);
/*
* Both SD and MMC specifications state (although a bit
* unclearly in the MMC case) that a block size of 512
* bytes must always be supported by the card.
*/
md->block_bits = 9;
md->disk = alloc_disk(1 << MMC_SHIFT);
if (md->disk == NULL) {
ret = -ENOMEM;
@ -454,7 +441,7 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
sprintf(md->disk->disk_name, "mmcblk%d", devidx);
blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits);
blk_queue_hardsect_size(md->queue.queue, 512);
if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
/*
@ -492,7 +479,7 @@ mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card)
mmc_claim_host(card->host);
cmd.opcode = MMC_SET_BLOCKLEN;
cmd.arg = 1 << md->block_bits;
cmd.arg = 512;
cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
err = mmc_wait_for_cmd(card->host, &cmd, 5);
mmc_release_host(card->host);