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mmc: sdhci: Handle auto-command errors 

If the host controller supports auto-commands then enable the auto-command
error interrupt and handle it. In the case of auto-CMD23, the error is
treated the same as manual CMD23 error. In the case of auto-CMD12,
commands-during-transfer are not permitted, so the error handling is
treated the same as a data error.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2018-11-15 15:53:43 +02:00 committed by Ulf Hansson
parent 869f8a69bb
commit af849c8610
2 changed files with 41 additions and 1 deletions
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35
drivers/mmc/host/sdhci.c
View File

@ -933,6 +933,11 @@ static void sdhci_set_transfer_irqs(struct sdhci_host *host)
else
host->ier = (host->ier & ~dma_irqs) | pio_irqs;
if (host->flags & (SDHCI_AUTO_CMD23 | SDHCI_AUTO_CMD12))
host->ier |= SDHCI_INT_AUTO_CMD_ERR;
else
host->ier &= ~SDHCI_INT_AUTO_CMD_ERR;
sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
}
@ -2757,6 +2762,21 @@ static void sdhci_timeout_data_timer(struct timer_list *t)
static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask, u32 *intmask_p)
{
/* Handle auto-CMD12 error */
if (intmask & SDHCI_INT_AUTO_CMD_ERR && host->data_cmd) {
struct mmc_request *mrq = host->data_cmd->mrq;
u16 auto_cmd_status = sdhci_readw(host, SDHCI_AUTO_CMD_STATUS);
int data_err_bit = (auto_cmd_status & SDHCI_AUTO_CMD_TIMEOUT) ?
SDHCI_INT_DATA_TIMEOUT :
SDHCI_INT_DATA_CRC;
/* Treat auto-CMD12 error the same as data error */
if (!mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) {
*intmask_p |= data_err_bit;
return;
}
}
if (!host->cmd) {
/*
* SDHCI recovers from errors by resetting the cmd and data
@ -2791,6 +2811,21 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask, u32 *intmask_p)
return;
}
/* Handle auto-CMD23 error */
if (intmask & SDHCI_INT_AUTO_CMD_ERR) {
struct mmc_request *mrq = host->cmd->mrq;
u16 auto_cmd_status = sdhci_readw(host, SDHCI_AUTO_CMD_STATUS);
int err = (auto_cmd_status & SDHCI_AUTO_CMD_TIMEOUT) ?
-ETIMEDOUT :
-EILSEQ;
if (mrq->sbc && (host->flags & SDHCI_AUTO_CMD23)) {
mrq->sbc->error = err;
sdhci_finish_mrq(host, mrq);
return;
}
}
if (intmask & SDHCI_INT_RESPONSE)
sdhci_finish_command(host);
}

7
drivers/mmc/host/sdhci.h
View File

@ -153,7 +153,8 @@
#define SDHCI_INT_ERROR_MASK 0xFFFF8000
#define SDHCI_INT_CMD_MASK (SDHCI_INT_RESPONSE | SDHCI_INT_TIMEOUT | \
SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX)
SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX | \
SDHCI_INT_AUTO_CMD_ERR)
#define SDHCI_INT_DATA_MASK (SDHCI_INT_DATA_END | SDHCI_INT_DMA_END | \
SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL | \
SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_DATA_CRC | \
@ -169,6 +170,10 @@
#define SDHCI_CQE_INT_MASK (SDHCI_CQE_INT_ERR_MASK | SDHCI_INT_CQE)
#define SDHCI_AUTO_CMD_STATUS 0x3C
#define SDHCI_AUTO_CMD_TIMEOUT 0x00000002
#define SDHCI_AUTO_CMD_CRC 0x00000004
#define SDHCI_AUTO_CMD_END_BIT 0x00000008
#define SDHCI_AUTO_CMD_INDEX 0x00000010
#define SDHCI_HOST_CONTROL2 0x3E
#define SDHCI_CTRL_UHS_MASK 0x0007