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authorSahitya Tummala <stummala@codeaurora.org>2011-05-02 18:09:18 +0530
committerChris Ball <cjb@laptop.org>2011-10-26 15:43:37 -0400
commit4a268e0879c4044523757b6ac94b56fc7955a116 (patch)
tree3397cdc9c1d95b215e6094e1629fc3a4e4c1ae30 /drivers/mmc/host/msm_sdcc.c
parent4a92fe80becbbee650cfad8457ad0e5cd97ed974 (diff)
mmc: msm_sdcc: Use MCI_INT_MASK0 for PIO interrupts
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 <palnatim@codeaurora.org> Signed-off-by: Sahitya Tummala <stummala@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/msm_sdcc.c')
-rw-r--r--drivers/mmc/host/msm_sdcc.c20
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c
index 1f1eff9bda5..c405e93335e 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;
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)