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imx233: always keep cards in TRAN mode

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Instead of going back and forth between TRAN and STBY modes,
stay in TRAN mode all the time, this avoid two commands on each
read/write and a potential delay to wait for the card.

Change-Id: Iafd456ab9a581d870331b622eeb48dcc254eda7f
This commit is contained in:
Amaury Pouly 2013-08-21 11:10:05 +02:00
parent e90a5efe54
commit 462adf2a0f
1 changed files with 0 additions and 22 deletions
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22
firmware/target/arm/imx233/sdmmc-imx233.c
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@ -497,9 +497,6 @@ static int init_mmc_drive(int drive)
window_start[drive] = 0;
window_end[drive] = *sec_count;
}
/* deselect card */
if(!send_cmd(drive, MMC_DESELECT_CARD, 0, MCI_NO_RESP, NULL))
return -13;
/* MMC always support CMD23 */
support_set_block_count[drive] = false;
@ -578,18 +575,6 @@ static int transfer_sectors(int drive, unsigned long start, int count, void *buf
ret = -201;
goto Lend;
}
/* select card.
* NOTE: rely on SD_SELECT_CARD=MMC_SELECT_CARD */
if(!send_cmd(drive, SD_SELECT_CARD, SDMMC_RCA(drive), MCI_NO_RESP, NULL))
{
ret = -20;
goto Lend;
}
/* wait for TRAN state */
/* NOTE: rely on SD_TRAN=MMC_TRAN */
ret = wait_for_state(drive, SD_TRAN);
if(ret < 0)
goto Ldeselect;
/**
* NOTE: we need to make sure dma transfers are aligned. This is handled
@ -646,13 +631,6 @@ static int transfer_sectors(int drive, unsigned long start, int count, void *buf
else
ret = __xfer_sectors(drive, start, count, buf, read);
}
/* deselect card */
Ldeselect:
/* CMD7 w/rca =0 : deselects card & puts it in STBY state
* NOTE: rely on SD_DESELECT_CARD=MMC_DESELECT_CARD */
if(!send_cmd(drive, SD_DESELECT_CARD, 0, MCI_NO_RESP, NULL))
ret = -23;
Lend:
/* update led status */
led(false);