aboutsummaryrefslogtreecommitdiff
path: root/drivers/dma/at_xdmac.c
diff options
context:
space:
mode:
authorLudovic Desroches <ludovic.desroches@atmel.com>2014-11-17 14:42:07 +0100
committerVinod Koul <vinod.koul@intel.com>2014-12-22 12:28:57 +0530
commit3d138877e8547e472863d975488bbf80f5a7be6c (patch)
tree28f4bc9ee4f71bd2858a7ff8ce103655f5729b1d /drivers/dma/at_xdmac.c
parent4facfe7f09f2b3f0799c924d9d6a0855a42c0833 (diff)
downloadlinux-stericsson-3d138877e8547e472863d975488bbf80f5a7be6c.tar.gz
dmaengine: at_xdmac: split device_control
Use newly introduced callbacks. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/at_xdmac.c')
-rw-r--r--drivers/dma/at_xdmac.c94
1 files changed, 57 insertions, 37 deletions
diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
index ff67466c779c..c7f335088d1e 100644
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c
@@ -1107,58 +1107,75 @@ static void at_xdmac_issue_pending(struct dma_chan *chan)
return;
}
-static int at_xdmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
- unsigned long arg)
+static int at_xdmac_device_config(struct dma_chan *chan,
+ struct dma_slave_config *config)
+{
+ struct at_xdmac_chan *atchan = to_at_xdmac_chan(chan);
+ int ret;
+
+ dev_dbg(chan2dev(chan), "%s\n", __func__);
+
+ spin_lock_bh(&atchan->lock);
+ ret = at_xdmac_set_slave_config(chan, config);
+ spin_unlock_bh(&atchan->lock);
+
+ return ret;
+}
+
+static int at_xdmac_device_pause(struct dma_chan *chan)
{
- struct at_xdmac_desc *desc, *_desc;
struct at_xdmac_chan *atchan = to_at_xdmac_chan(chan);
struct at_xdmac *atxdmac = to_at_xdmac(atchan->chan.device);
- int ret = 0;
- dev_dbg(chan2dev(chan), "%s: cmd=%d\n", __func__, cmd);
+ dev_dbg(chan2dev(chan), "%s\n", __func__);
spin_lock_bh(&atchan->lock);
+ at_xdmac_write(atxdmac, AT_XDMAC_GRWS, atchan->mask);
+ set_bit(AT_XDMAC_CHAN_IS_PAUSED, &atchan->status);
+ spin_unlock_bh(&atchan->lock);
- switch (cmd) {
- case DMA_PAUSE:
- at_xdmac_write(atxdmac, AT_XDMAC_GRWS, atchan->mask);
- set_bit(AT_XDMAC_CHAN_IS_PAUSED, &atchan->status);
- break;
+ return 0;
+}
- case DMA_RESUME:
- if (!at_xdmac_chan_is_paused(atchan))
- break;
+static int at_xdmac_device_resume(struct dma_chan *chan)
+{
+ struct at_xdmac_chan *atchan = to_at_xdmac_chan(chan);
+ struct at_xdmac *atxdmac = to_at_xdmac(atchan->chan.device);
- at_xdmac_write(atxdmac, AT_XDMAC_GRWR, atchan->mask);
- clear_bit(AT_XDMAC_CHAN_IS_PAUSED, &atchan->status);
- break;
+ dev_dbg(chan2dev(chan), "%s\n", __func__);
- case DMA_TERMINATE_ALL:
- at_xdmac_write(atxdmac, AT_XDMAC_GD, atchan->mask);
- while (at_xdmac_read(atxdmac, AT_XDMAC_GS) & atchan->mask)
- cpu_relax();
+ spin_lock_bh(&atchan->lock);
+ if (!at_xdmac_chan_is_paused(atchan))
+ return 0;
- /* Cancel all pending transfers. */
- list_for_each_entry_safe(desc, _desc, &atchan->xfers_list, xfer_node)
- at_xdmac_remove_xfer(atchan, desc);
+ at_xdmac_write(atxdmac, AT_XDMAC_GRWR, atchan->mask);
+ clear_bit(AT_XDMAC_CHAN_IS_PAUSED, &atchan->status);
+ spin_unlock_bh(&atchan->lock);
+
+ return 0;
+}
+
+static int at_xdmac_device_terminate_all(struct dma_chan *chan)
+{
+ struct at_xdmac_desc *desc, *_desc;
+ struct at_xdmac_chan *atchan = to_at_xdmac_chan(chan);
+ struct at_xdmac *atxdmac = to_at_xdmac(atchan->chan.device);
- clear_bit(AT_XDMAC_CHAN_IS_CYCLIC, &atchan->status);
- break;
+ dev_dbg(chan2dev(chan), "%s\n", __func__);
- case DMA_SLAVE_CONFIG:
- ret = at_xdmac_set_slave_config(chan,
- (struct dma_slave_config *)arg);
- break;
+ spin_lock_bh(&atchan->lock);
+ at_xdmac_write(atxdmac, AT_XDMAC_GD, atchan->mask);
+ while (at_xdmac_read(atxdmac, AT_XDMAC_GS) & atchan->mask)
+ cpu_relax();
- default:
- dev_err(chan2dev(chan),
- "unmanaged or unknown dma control cmd: %d\n", cmd);
- ret = -ENXIO;
- }
+ /* Cancel all pending transfers. */
+ list_for_each_entry_safe(desc, _desc, &atchan->xfers_list, xfer_node)
+ at_xdmac_remove_xfer(atchan, desc);
+ clear_bit(AT_XDMAC_CHAN_IS_CYCLIC, &atchan->status);
spin_unlock_bh(&atchan->lock);
- return ret;
+ return 0;
}
static int at_xdmac_alloc_chan_resources(struct dma_chan *chan)
@@ -1270,7 +1287,7 @@ static int atmel_xdmac_suspend(struct device *dev)
if (at_xdmac_chan_is_cyclic(atchan)) {
if (!at_xdmac_chan_is_paused(atchan))
- at_xdmac_control(chan, DMA_PAUSE, 0);
+ at_xdmac_device_pause(chan);
atchan->save_cim = at_xdmac_chan_read(atchan, AT_XDMAC_CIM);
atchan->save_cnda = at_xdmac_chan_read(atchan, AT_XDMAC_CNDA);
atchan->save_cndc = at_xdmac_chan_read(atchan, AT_XDMAC_CNDC);
@@ -1407,7 +1424,10 @@ static int at_xdmac_probe(struct platform_device *pdev)
atxdmac->dma.device_prep_dma_cyclic = at_xdmac_prep_dma_cyclic;
atxdmac->dma.device_prep_dma_memcpy = at_xdmac_prep_dma_memcpy;
atxdmac->dma.device_prep_slave_sg = at_xdmac_prep_slave_sg;
- atxdmac->dma.device_control = at_xdmac_control;
+ atxdmac->dma.device_config = at_xdmac_device_config;
+ atxdmac->dma.device_pause = at_xdmac_device_pause;
+ atxdmac->dma.device_resume = at_xdmac_device_resume;
+ atxdmac->dma.device_terminate_all = at_xdmac_device_terminate_all;
atxdmac->dma.device_slave_caps = at_xdmac_device_slave_caps;
/* Disable all chans and interrupts. */