slask polling mode
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index e8da587..bdddfae 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -86,6 +86,7 @@
* @start_err: bitmask identifying the STARTBITERR bit inside MMCISTATUS
* register.
* @opendrain: bitmask identifying the OPENDRAIN bit inside MMCIPOWER register
+ * @polling_mode: the device is put into polling mode
*/
struct variant_data {
unsigned int clkreg;
@@ -118,6 +119,7 @@
bool mmcimask1;
u32 start_err;
u32 opendrain;
+ bool polling_mode;
};
static struct variant_data variant_arm = {
@@ -190,6 +192,7 @@
.mmcimask1 = true,
.start_err = MCI_STARTBITERR,
.opendrain = MCI_OD,
+ .polling_mode = true,
};
static struct variant_data variant_ux500 = {
@@ -904,12 +907,16 @@
* Attempt to use DMA operation mode, if this
* should fail, fall back to PIO mode
*/
- if (!mmci_dma_start_data(host, datactrl))
+ if (!variant->polling_mode && !mmci_dma_start_data(host, datactrl))
return;
- /* IRQ mode, map the SG list for CPU reading/writing */
+ /* IRQ or polling mode, map the SG list for CPU reading/writing */
mmci_init_sg(host, data);
+ /* We will poll for completion, do not turn on interrupts */
+ if (variant->polling_mode)
+ return;
+
if (data->flags & MMC_DATA_READ) {
irqmask = MCI_RXFIFOHALFFULLMASK;
@@ -1270,6 +1277,8 @@
mmci_start_command(host, host->mrq->cmd, 0);
} else if (!(cmd->data->flags & MMC_DATA_READ)) {
mmci_start_data(host, cmd->data);
+ if (host->variant->polling_mode)
+ mmci_pio_poll(host);
}
}
@@ -1414,8 +1423,11 @@
if (mrq->data)
mmci_get_next_data(host, mrq->data);
- if (mrq->data && mrq->data->flags & MMC_DATA_READ)
+ if (mrq->data && mrq->data->flags & MMC_DATA_READ) {
mmci_start_data(host, mrq->data);
+ if (host->variant->polling_mode)
+ mmci_pio_poll(host);
+ }
if (mrq->sbc)
mmci_start_command(host, mrq->sbc, 0);
