mmc: Fixes for Dual Data Rate (DDR) support

The DDR support patch needs the following fixes:

- The block driver does not need to know about DDR, any more
  than it needs to know about bus width.
- Not only the card must be switched to DDR mode.  The host
  controller must also be configured, which is done through
  the 'set_ios()' function.
- Do not set the DDR mode state until after the switch command
  is successful.
- Setting block length is not supported in DDR mode.  Make that
  a core function and change the other place it is used (mmc_test)
  also.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 3 insertions, 16 deletions

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index aab593480975..a9970504cabb 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -373,8 +373,6 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
                         readcmd = MMC_READ_SINGLE_BLOCK;
                         writecmd = MMC_WRITE_BLOCK;
                 }
-                if (mmc_card_ddr_mode(card))
-                        brq.data.flags |= MMC_DDR_MODE;
                 if (rq_data_dir(req) == READ) {
                         brq.cmd.opcode = readcmd;
                         brq.data.flags |= MMC_DATA_READ;
@@ -653,26 +651,15 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
 static int
 mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card)
 {
-        struct mmc_command cmd;
         int err;
 
-        /*
-         * Block-addressed and ddr mode supported cards
-         * ignore MMC_SET_BLOCKLEN.
-         */
-        if (mmc_card_blockaddr(card) || mmc_card_ddr_mode(card))
-                return 0;
-
         mmc_claim_host(card->host);
-        cmd.opcode = MMC_SET_BLOCKLEN;
-        cmd.arg = 512;
-        cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
-        err = mmc_wait_for_cmd(card->host, &cmd, 5);
+        err = mmc_set_blocklen(card, 512);
         mmc_release_host(card->host);
 
         if (err) {
-                printk(KERN_ERR "%s: unable to set block size to %d: %d\n",
-                        md->disk->disk_name, cmd.arg, err);
+                printk(KERN_ERR "%s: unable to set block size to 512: %d\n",
+                        md->disk->disk_name, err);
                 return -EINVAL;
         }