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ad-as3525v2: Ask for a reponse from SD_APP_CMD to help with timing issues when switching to 4 bit widebus.

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Some SD cards were having problems switching to 4 Bit widebus and this solution appears to remedy that.
Thanks to Luca_S!

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25846 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jack Halpin 2010-05-06 18:53:41 +00:00
parent ba0f8310bc
commit db8d07589f
1 changed files with 4 additions and 4 deletions
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8
firmware/target/arm/as3525/sd-as3525v2.c
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@ -542,15 +542,15 @@ static int sd_init_card(const int drive)
/* Switch to to 4 bit widebus mode */ /* Switch to to 4 bit widebus mode */
if(sd_wait_for_state(drive, SD_TRAN) < 0) if(sd_wait_for_state(drive, SD_TRAN) < 0)
return -13; return -13;
/* CMD55 */ /* CMD55 */ /* Response is requested due to timing issue */
if(!send_cmd(drive, SD_APP_CMD, card_info[drive].rca, MCI_NO_RESP, NULL)) if(!send_cmd(drive, SD_APP_CMD, card_info[drive].rca, MCI_RESP, &response))
return -14; return -14;
/* ACMD6 */ /* ACMD6 */
if(!send_cmd(drive, SD_SET_BUS_WIDTH, 2, MCI_NO_RESP, NULL)) if(!send_cmd(drive, SD_SET_BUS_WIDTH, 2, MCI_NO_RESP, NULL))
return -15; return -15;
mci_delay(); mci_delay();
/* CMD55 */ /* CMD55 */ /* Response is requested due to timing issue */
if(!send_cmd(drive, SD_APP_CMD, card_info[drive].rca, MCI_NO_RESP, NULL)) if(!send_cmd(drive, SD_APP_CMD, card_info[drive].rca, MCI_RESP, &response))
return -16; return -16;
/* ACMD42 */ /* ACMD42 */
if(!send_cmd(drive, SD_SET_CLR_CARD_DETECT, 0, MCI_NO_RESP, NULL)) if(!send_cmd(drive, SD_SET_CLR_CARD_DETECT, 0, MCI_NO_RESP, NULL))