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>
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 250aa18..4b2bedc 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -2228,6 +2228,21 @@
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 @@
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");