diff options
| author | David Brownell <david-b@pacbell.net> | 2007-08-08 09:10:23 -0700 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2007-09-23 21:39:47 +0200 |
| commit | 7213d175e3b6f6db60f843b72e88857a350e146a (patch) | |
| tree | 82b5041a4eb51ab734f0d44f16cd9916338c1249 /drivers/mmc/card | |
| parent | 97018580c40c8a31dd7ae744da3378c787a2066d (diff) | |
| download | blackbird-obmc-linux-7213d175e3b6f6db60f843b72e88857a350e146a.tar.gz blackbird-obmc-linux-7213d175e3b6f6db60f843b72e88857a350e146a.zip | |
MMC/SD card driver learns SPI
Teaching the MMC/SD block card driver about SPI.
- Provide the SPI response type flags with each request issued.
- Understand that multiblock SPI writes don't use STOP_TRANSMISSION.
- Correct check for APP_CMD failure.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/card')
| -rw-r--r-- | drivers/mmc/card/block.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index ab510689ecde..e38d5a3b2a89 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -151,17 +151,19 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) cmd.opcode = MMC_APP_CMD; cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; err = mmc_wait_for_cmd(card->host, &cmd, 0); - if (err || !(cmd.resp[0] & R1_APP_CMD)) + if (err) + return (u32)-1; + if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) return (u32)-1; memset(&cmd, 0, sizeof(struct mmc_command)); cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; cmd.arg = 0; - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; memset(&data, 0, sizeof(struct mmc_data)); @@ -220,11 +222,11 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) brq.cmd.arg = req->sector; if (!mmc_card_blockaddr(card)) brq.cmd.arg <<= 9; - brq.cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + brq.cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; brq.data.blksz = 1 << md->block_bits; brq.stop.opcode = MMC_STOP_TRANSMISSION; brq.stop.arg = 0; - brq.stop.flags = MMC_RSP_R1B | MMC_CMD_AC; + brq.stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; brq.data.blocks = req->nr_sectors >> (md->block_bits - 9); if (brq.data.blocks > card->host->max_blk_count) brq.data.blocks = card->host->max_blk_count; @@ -241,7 +243,12 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) brq.data.blocks = 1; if (brq.data.blocks > 1) { - brq.mrq.stop = &brq.stop; + /* SPI multiblock writes terminate using a special + * token, not a STOP_TRANSMISSION request. + */ + if (!mmc_host_is_spi(card->host) + || rq_data_dir(req) == READ) + brq.mrq.stop = &brq.stop; readcmd = MMC_READ_MULTIPLE_BLOCK; writecmd = MMC_WRITE_MULTIPLE_BLOCK; } else { @@ -301,7 +308,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) goto cmd_err; } - if (rq_data_dir(req) != READ) { + if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) { do { int err; @@ -509,7 +516,7 @@ 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.flags = MMC_RSP_R1 | MMC_CMD_AC; + 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); |
