mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

mmc: dw_mmc: enable controller interrupt before calling mmc_start_host 

As mmc_start_host is getting called before enabling the dw_mmc controller
interrupt, there is a problem of missing the SDMMC_INT_CMD_DONE for the
very first command sent by the sdio_reset.

This problem occurs only when we disable MMC debugging i.e, MMC_DEBUG=n.
This patch enables the dw_mmc controller interrupt before mmc_start_host.

Signed-off-by: Yuvaraj CD <yuvaraj.cd@samsung.com>
Reviewed-by: Girish K S <girish.shivananjappa@linaro.org>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Yuvaraj CD 2012-10-08 14:29:51 +05:30 committed by Chris Ball
parent 63ef5d8c28
commit 2da1d7f294
1 changed files with 15 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/mmc/host/dw_mmc.c
View File

@ -2228,6 +2228,21 @@ int dw_mci_probe(struct dw_mci *host)
else
host->num_slots = ((mci_readl(host, HCON) >> 1) & 0x1F) + 1;
/*
* Enable interrupts for command done, data over, data empty, card det,
* receive ready and error such as transmit, receive timeout, crc error
*/
mci_writel(host, RINTSTS, 0xFFFFFFFF);
mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER |
SDMMC_INT_TXDR | SDMMC_INT_RXDR |
DW_MCI_ERROR_FLAGS | SDMMC_INT_CD);
mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); /* Enable mci interrupt */
dev_info(host->dev, "DW MMC controller at irq %d, "
"%d bit host data width, "
"%u deep fifo\n",
host->irq, width, fifo_size);
/* We need at least one slot to succeed */
for (i = 0; i < host->num_slots; i++) {
ret = dw_mci_init_slot(host, i);
@ -2257,20 +2272,6 @@ int dw_mci_probe(struct dw_mci *host)
else
host->data_offset = DATA_240A_OFFSET;
/*
* Enable interrupts for command done, data over, data empty, card det,
* receive ready and error such as transmit, receive timeout, crc error
*/
mci_writel(host, RINTSTS, 0xFFFFFFFF);
mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER |
SDMMC_INT_TXDR | SDMMC_INT_RXDR |
DW_MCI_ERROR_FLAGS | SDMMC_INT_CD);
mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); /* Enable mci interrupt */
dev_info(host->dev, "DW MMC controller at irq %d, "
"%d bit host data width, "
"%u deep fifo\n",
host->irq, width, fifo_size);
if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO)
dev_info(host->dev, "Internal DMAC interrupt fix enabled.\n");