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[ARM] 4256/1: i.MX/MX1 SDHC fix/workaround of SD card recognition problems

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The SDHC controllers cannot process shorter transfers.
They has to be handled as longer ones, but it such case CRC
error is evaluated. There was a case in the code still,
where this error is not ignored as it should to be process
these transfers.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Pavel Pisa 2007-03-08 00:00:40 +01:00 committed by Russell King
parent b3c6b76ffb
commit 2cb3320b3f
1 changed files with 12 additions and 1 deletions
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13
drivers/mmc/imxmmc.c
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@ -569,10 +569,12 @@ static int imxmci_cpu_driven_data(struct imxmci_host *host, unsigned int *pstat)
if(host->dma_dir == DMA_FROM_DEVICE) {
imxmci_busy_wait_for_status(host, &stat,
STATUS_APPL_BUFF_FF | STATUS_DATA_TRANS_DONE,
STATUS_APPL_BUFF_FF | STATUS_DATA_TRANS_DONE |
STATUS_TIME_OUT_READ,
50, "imxmci_cpu_driven_data read");
while((stat & (STATUS_APPL_BUFF_FF | STATUS_DATA_TRANS_DONE)) &&
!(stat & STATUS_TIME_OUT_READ) &&
(host->data_cnt < 512)) {
udelay(20); /* required for clocks < 8MHz*/
@ -602,6 +604,12 @@ static int imxmci_cpu_driven_data(struct imxmci_host *host, unsigned int *pstat)
if(host->dma_size & 0x1ff)
stat &= ~STATUS_CRC_READ_ERR;
if(stat & STATUS_TIME_OUT_READ) {
dev_dbg(mmc_dev(host->mmc), "imxmci_cpu_driven_data read timeout STATUS = 0x%x\n",
stat);
trans_done = -1;
}
} else {
imxmci_busy_wait_for_status(host, &stat,
STATUS_APPL_BUFF_FE,
@ -709,6 +717,9 @@ static void imxmci_tasklet_fnc(unsigned long data)
*/
stat |= host->status_reg;
if(test_bit(IMXMCI_PEND_CPU_DATA_b, &host->pending_events))
stat &= ~STATUS_CRC_READ_ERR;
if(test_bit(IMXMCI_PEND_WAIT_RESP_b, &host->pending_events)) {
imxmci_busy_wait_for_status(host, &stat,
STATUS_END_CMD_RESP | STATUS_ERR_MASK,