commit 7213d175e3b6f6db60f843b72e88857a350e146a
author David Brownell <david-b@pacbell.net> Wed Aug 08 09:10:23 2007 -0700
committer Pierre Ossman <drzeus@drzeus.cx> Sun Sep 23 21:39:47 2007 +0200
tree 82b5041a4eb51ab734f0d44f16cd9916338c1249
parent 97018580c40c8a31dd7ae744da3378c787a2066d

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>

drivers/mmc/card/block.c

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index ab51068..e38d5a3 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -151,17 +151,19 @@
 
 	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 @@
 		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 @@
 			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 @@
 			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_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);