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path: root/drivers/dma/amba-pl08x.c
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Diffstat (limited to 'drivers/dma/amba-pl08x.c')
-rw-r--r--drivers/dma/amba-pl08x.c41
1 files changed, 22 insertions, 19 deletions
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 0698695e8bf..8a281584458 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -854,8 +854,10 @@ static int prep_phy_channel(struct pl08x_dma_chan *plchan,
int ret;
/* Check if we already have a channel */
- if (plchan->phychan)
- return 0;
+ if (plchan->phychan) {
+ ch = plchan->phychan;
+ goto got_channel;
+ }
ch = pl08x_get_phy_channel(pl08x, plchan);
if (!ch) {
@@ -880,21 +882,22 @@ static int prep_phy_channel(struct pl08x_dma_chan *plchan,
return -EBUSY;
}
ch->signal = ret;
-
- /* Assign the flow control signal to this channel */
- if (txd->direction == DMA_TO_DEVICE)
- txd->ccfg |= ch->signal << PL080_CONFIG_DST_SEL_SHIFT;
- else if (txd->direction == DMA_FROM_DEVICE)
- txd->ccfg |= ch->signal << PL080_CONFIG_SRC_SEL_SHIFT;
}
+ plchan->phychan = ch;
dev_dbg(&pl08x->adev->dev, "allocated physical channel %d and signal %d for xfer on %s\n",
ch->id,
ch->signal,
plchan->name);
+got_channel:
+ /* Assign the flow control signal to this channel */
+ if (txd->direction == DMA_MEM_TO_DEV)
+ txd->ccfg |= ch->signal << PL080_CONFIG_DST_SEL_SHIFT;
+ else if (txd->direction == DMA_DEV_TO_MEM)
+ txd->ccfg |= ch->signal << PL080_CONFIG_SRC_SEL_SHIFT;
+
plchan->phychan_hold++;
- plchan->phychan = ch;
return 0;
}
@@ -1102,10 +1105,10 @@ static int dma_set_runtime_config(struct dma_chan *chan,
/* Transfer direction */
plchan->runtime_direction = config->direction;
- if (config->direction == DMA_TO_DEVICE) {
+ if (config->direction == DMA_MEM_TO_DEV) {
addr_width = config->dst_addr_width;
maxburst = config->dst_maxburst;
- } else if (config->direction == DMA_FROM_DEVICE) {
+ } else if (config->direction == DMA_DEV_TO_MEM) {
addr_width = config->src_addr_width;
maxburst = config->src_maxburst;
} else {
@@ -1136,7 +1139,7 @@ static int dma_set_runtime_config(struct dma_chan *chan,
cctl |= burst << PL080_CONTROL_SB_SIZE_SHIFT;
cctl |= burst << PL080_CONTROL_DB_SIZE_SHIFT;
- if (plchan->runtime_direction == DMA_FROM_DEVICE) {
+ if (plchan->runtime_direction == DMA_DEV_TO_MEM) {
plchan->src_addr = config->src_addr;
plchan->src_cctl = pl08x_cctl(cctl) | PL080_CONTROL_DST_INCR |
pl08x_select_bus(plchan->cd->periph_buses,
@@ -1152,7 +1155,7 @@ static int dma_set_runtime_config(struct dma_chan *chan,
"configured channel %s (%s) for %s, data width %d, "
"maxburst %d words, LE, CCTL=0x%08x\n",
dma_chan_name(chan), plchan->name,
- (config->direction == DMA_FROM_DEVICE) ? "RX" : "TX",
+ (config->direction == DMA_DEV_TO_MEM) ? "RX" : "TX",
addr_width,
maxburst,
cctl);
@@ -1322,7 +1325,7 @@ static struct dma_async_tx_descriptor *pl08x_prep_dma_memcpy(
static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl,
- unsigned int sg_len, enum dma_data_direction direction,
+ unsigned int sg_len, enum dma_transfer_direction direction,
unsigned long flags)
{
struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
@@ -1354,10 +1357,10 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
*/
txd->direction = direction;
- if (direction == DMA_TO_DEVICE) {
+ if (direction == DMA_MEM_TO_DEV) {
txd->cctl = plchan->dst_cctl;
slave_addr = plchan->dst_addr;
- } else if (direction == DMA_FROM_DEVICE) {
+ } else if (direction == DMA_DEV_TO_MEM) {
txd->cctl = plchan->src_cctl;
slave_addr = plchan->src_addr;
} else {
@@ -1368,10 +1371,10 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
}
if (plchan->cd->device_fc)
- tmp = (direction == DMA_TO_DEVICE) ? PL080_FLOW_MEM2PER_PER :
+ tmp = (direction == DMA_MEM_TO_DEV) ? PL080_FLOW_MEM2PER_PER :
PL080_FLOW_PER2MEM_PER;
else
- tmp = (direction == DMA_TO_DEVICE) ? PL080_FLOW_MEM2PER :
+ tmp = (direction == DMA_MEM_TO_DEV) ? PL080_FLOW_MEM2PER :
PL080_FLOW_PER2MEM;
txd->ccfg |= tmp << PL080_CONFIG_FLOW_CONTROL_SHIFT;
@@ -1387,7 +1390,7 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
list_add_tail(&dsg->node, &txd->dsg_list);
dsg->len = sg_dma_len(sg);
- if (direction == DMA_TO_DEVICE) {
+ if (direction == DMA_MEM_TO_DEV) {
dsg->src_addr = sg_phys(sg);
dsg->dst_addr = slave_addr;
} else {