[PATCH v3 42/59] dmaengine: d40: Split device_control

Maxime Ripard
2014-10-22T15:45:56Z

Split the device_control callback of the ST-Ericsson DMA 40 driver to make use
of the newly introduced callbacks, that will eventually be used to retrieve
slave capabilities.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
drivers/dma/ste_dma40.c | 60 +++++++++++++++++++++++--------------------------
1 file changed, 28 insertions(+), 32 deletions(-)

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 5fe59335e247..b781c988b592 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -1429,11 +1429,17 @@ static bool d40_tx_is_linked(struct d40_chan *d40c)
return is_link;
}

-static int d40_pause(struct d40_chan *d40c)
+static int d40_pause(struct dma_chan *chan)
{
+ struct d40_chan *d40c = container_of(chan, struct d40_chan, chan);
int res = 0;
unsigned long flags;

+ if (d40c->phy_chan == NULL) {
+ chan_err(d40c, "Channel is not allocated!\n");
+ return -EINVAL;
+ }
+
if (!d40c->busy)
return 0;

@@ -1448,11 +1454,17 @@ static int d40_pause(struct d40_chan *d40c)
return res;
}

-static int d40_resume(struct d40_chan *d40c)
+static int d40_resume(struct dma_chan *chan)
{
+ struct d40_chan *d40c = container_of(chan, struct d40_chan, chan);
int res = 0;
unsigned long flags;

+ if (d40c->phy_chan == NULL) {
+ chan_err(d40c, "Channel is not allocated!\n");
+ return -EINVAL;
+ }
+
if (!d40c->busy)
return 0;

@@ -2610,6 +2622,11 @@ static void d40_terminate_all(struct dma_chan *chan)
struct d40_chan *d40c = container_of(chan, struct d40_chan, chan);
int ret;

+ if (d40c->phy_chan == NULL) {
+ chan_err(d40c, "Channel is not allocated!\n");
+ return -EINVAL;
+ }
+
spin_lock_irqsave(&d40c->lock, flags);

pm_runtime_get_sync(d40c->base->dev);
@@ -2673,6 +2690,11 @@ static int d40_set_runtime_config(struct dma_chan *chan,
u32 src_maxburst, dst_maxburst;
int ret;

+ if (d40c->phy_chan == NULL) {
+ chan_err(d40c, "Channel is not allocated!\n");
+ return -EINVAL;
+ }
+
src_addr_width = config->src_addr_width;
src_maxburst = config->src_maxburst;
dst_addr_width = config->dst_addr_width;
@@ -2781,35 +2803,6 @@ static int d40_set_runtime_config(struct dma_chan *chan,
return 0;
}

-static int d40_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
- unsigned long arg)
-{
- struct d40_chan *d40c = container_of(chan, struct d40_chan, chan);
-
- if (d40c->phy_chan == NULL) {
- chan_err(d40c, "Channel is not allocated!\n");
- return -EINVAL;
- }
-
- switch (cmd) {
- case DMA_TERMINATE_ALL:
- d40_terminate_all(chan);
- return 0;
- case DMA_PAUSE:
- return d40_pause(d40c);
- case DMA_RESUME:
- return d40_resume(d40c);
- case DMA_SLAVE_CONFIG:
- return d40_set_runtime_config(chan,
- (struct dma_slave_config *) arg);
- default:
- break;
- }
-
- /* Other commands are unimplemented */
- return -ENXIO;
-}
-
/* Initialization functions */

static void __init d40_chan_init(struct d40_base *base, struct dma_device *dma,
@@ -2870,7 +2863,10 @@ static void d40_ops_init(struct d40_base *base, struct dma_device *dev)
dev->device_free_chan_resources = d40_free_chan_resources;
dev->device_issue_pending = d40_issue_pending;
dev->device_tx_status = d40_tx_status;
- dev->device_control = d40_control;
+ dev->device_config = d40_set_runtime_config;
+ dev->device_pause = d40_pause;
+ dev->device_resume = d40_resume;
+ dev->device_terminate_all = d40_terminate_all;
dev->dev = base->dev;
}

--
2.1.1