Not all targets have IRQ1 line routed from the SD controller to
the processor. So we cannot rely on IRQ1 for PIO interrupts.
This patch moves all PIO interrupts to IRQ0 and enables the PIO
mode.
Signed-off-by: Murali Palnati <palna...@codeaurora.org>
Signed-off-by: Sahitya Tummala <stumm...@codeaurora.org>
---
drivers/mmc/host/msm_sdcc.c | 20 ++++++++++++++++----
drivers/mmc/host/msm_sdcc.h | 5 +++++
2 files changed, 21 insertions(+), 4 deletions(-)
diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c
index be45b6a..782e4cc 100644
--- a/drivers/mmc/host/msm_sdcc.c
+++ b/drivers/mmc/host/msm_sdcc.c
@@ -213,7 +213,8 @@ msmsdcc_dma_exec_func(struct msm_dmov_cmd *cmd)
msmsdcc_writel(host, host->cmd_timeout, MMCIDATATIMER);
msmsdcc_writel(host, (unsigned int)host->curr.xfer_size,
MMCIDATALENGTH);
- msmsdcc_writel(host, host->cmd_pio_irqmask, MMCIMASK1);
+ msmsdcc_writel(host, (msmsdcc_readl(host, MMCIMASK0) &
+ (~MCI_IRQ_PIO)) | host->cmd_pio_irqmask, MMCIMASK0);
msmsdcc_writel(host, host->cmd_datactrl, MMCIDATACTRL);
if (host->cmd_cmd) {
@@ -543,7 +544,9 @@ msmsdcc_start_data(struct msmsdcc_host *host, struct
mmc_data *data,
msmsdcc_writel(host, host->curr.xfer_size, MMCIDATALENGTH);
- msmsdcc_writel(host, pio_irqmask, MMCIMASK1);
+ msmsdcc_writel(host, (msmsdcc_readl(host, MMCIMASK0) &
+ (~MCI_IRQ_PIO)) | pio_irqmask, MMCIMASK0);
+
msmsdcc_writel(host, datactrl, MMCIDATACTRL);
if (cmd) {
@@ -659,8 +662,13 @@ msmsdcc_pio_irq(int irq, void *dev_id)
{
struct msmsdcc_host *host = dev_id;
uint32_t status;
+ u32 mci_mask0 = 0;
status = msmsdcc_readl(host, MMCISTATUS);
+ mci_mask0 = msmsdcc_readl(host, MMCIMASK0);
+
+ if (((mci_mask0 & status) & MCI_IRQ_PIO) == 0)
+ return IRQ_NONE;
do {
unsigned long flags;
@@ -719,10 +727,12 @@ msmsdcc_pio_irq(int irq, void *dev_id)
} while (1);
if (status & MCI_RXACTIVE && host->curr.xfer_remain < MCI_FIFOSIZE)
- msmsdcc_writel(host, MCI_RXDATAAVLBLMASK, MMCIMASK1);
+ msmsdcc_writel(host, (mci_mask0 & (~MCI_IRQ_PIO)) |
+ MCI_RXDATAAVLBLMASK, MMCIMASK0);
if (!host->curr.xfer_remain)
- msmsdcc_writel(host, 0, MMCIMASK1);
+ msmsdcc_writel(host, (mci_mask0 & (~MCI_IRQ_PIO)) | 0,
+ MMCIMASK0);
return IRQ_HANDLED;
}
@@ -854,6 +864,8 @@ msmsdcc_irq(int irq, void *dev_id)
do {
status = msmsdcc_readl(host, MMCISTATUS);
status &= msmsdcc_readl(host, MMCIMASK0);
+ if ((status & (~MCI_IRQ_PIO)) == 0)
+ break;
msmsdcc_writel(host, status, MMCICLEAR);
if (status & MCI_SDIOINTR)
diff --git a/drivers/mmc/host/msm_sdcc.h b/drivers/mmc/host/msm_sdcc.h
index fa626ed..402028d 100644
--- a/drivers/mmc/host/msm_sdcc.h
+++ b/drivers/mmc/host/msm_sdcc.h
@@ -140,6 +140,11 @@
MCI_DATATIMEOUTMASK|MCI_TXUNDERRUNMASK|MCI_RXOVERRUNMASK| \
MCI_CMDRESPENDMASK|MCI_CMDSENTMASK|MCI_DATAENDMASK|MCI_PROGDONEMASK)
+#define MCI_IRQ_PIO \
+ (MCI_RXDATAAVLBLMASK | MCI_TXDATAAVLBLMASK | MCI_RXFIFOEMPTYMASK | \
+ MCI_TXFIFOEMPTYMASK | MCI_RXFIFOFULLMASK | MCI_TXFIFOFULLMASK | \
+ MCI_RXFIFOHALFFULLMASK | MCI_TXFIFOHALFEMPTYMASK | \
+ MCI_RXACTIVEMASK | MCI_TXACTIVEMASK)
/*
* The size of the FIFO in bytes.
*/
--
1.7.1
--
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
