* [PATCH 2/2] dmaengine: at_xdmac: split device_control
2014-11-13 14:14 [PATCH 0/2] at_xdmac update for generic slave capabilities Ludovic Desroches
2014-11-13 14:14 ` [PATCH 1/2] dmaengine: at_xdmac: correct destination abbreviation Ludovic Desroches
@ 2014-11-13 14:14 ` Ludovic Desroches
2014-11-13 16:41 ` Maxime Ripard
2014-11-13 15:11 ` [PATCH] dmaengine: at_xdmac: Declare slave capabilities for the generic code Ludovic Desroches
2 siblings, 1 reply; 8+ messages in thread
From: Ludovic Desroches @ 2014-11-13 14:14 UTC (permalink / raw)
To: linux-arm-kernel
Use newly introduced callbacks.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
---
drivers/dma/at_xdmac.c | 94 ++++++++++++++++++++++++++++++--------------------
1 file changed, 57 insertions(+), 37 deletions(-)
diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
index ff67466..c7f3350 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. */
--
2.0.3
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH] dmaengine: at_xdmac: Declare slave capabilities for the generic code
2014-11-13 14:14 [PATCH 0/2] at_xdmac update for generic slave capabilities Ludovic Desroches
2014-11-13 14:14 ` [PATCH 1/2] dmaengine: at_xdmac: correct destination abbreviation Ludovic Desroches
2014-11-13 14:14 ` [PATCH 2/2] dmaengine: at_xdmac: split device_control Ludovic Desroches
@ 2014-11-13 15:11 ` Ludovic Desroches
2014-11-13 16:40 ` Maxime Ripard
2 siblings, 1 reply; 8+ messages in thread
From: Ludovic Desroches @ 2014-11-13 15:11 UTC (permalink / raw)
To: linux-arm-kernel
Now that the generic slave caps code can make use of the device assigned
capabilities, instead of relying on a callback to be implemented.
Make use of this code.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
---
drivers/dma/at_xdmac.c | 33 +++++++++++----------------------
1 file changed, 11 insertions(+), 22 deletions(-)
diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
index c7f3350..8c799f6 100644
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c
@@ -174,6 +174,13 @@
#define AT_XDMAC_MAX_CHAN 0x20
+#define AT_XDMAC_DMA_BUSWIDTHS\
+ (BIT(DMA_SLAVE_BUSWIDTH_UNDEFINED) |\
+ BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |\
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |\
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |\
+ BIT(DMA_SLAVE_BUSWIDTH_8_BYTES))
+
enum atc_status {
AT_XDMAC_CHAN_IS_CYCLIC = 0,
AT_XDMAC_CHAN_IS_PAUSED,
@@ -1234,27 +1241,6 @@ static void at_xdmac_free_chan_resources(struct dma_chan *chan)
return;
}
-#define AT_XDMAC_DMA_BUSWIDTHS\
- (BIT(DMA_SLAVE_BUSWIDTH_UNDEFINED) |\
- BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |\
- BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |\
- BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |\
- BIT(DMA_SLAVE_BUSWIDTH_8_BYTES))
-
-static int at_xdmac_device_slave_caps(struct dma_chan *dchan,
- struct dma_slave_caps *caps)
-{
-
- caps->src_addr_widths = AT_XDMAC_DMA_BUSWIDTHS;
- caps->dst_addr_widths = AT_XDMAC_DMA_BUSWIDTHS;
- caps->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
- caps->cmd_pause = true;
- caps->cmd_terminate = true;
- caps->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
-
- return 0;
-}
-
#ifdef CONFIG_PM
static int atmel_xdmac_prepare(struct device *dev)
{
@@ -1428,7 +1414,10 @@ static int at_xdmac_probe(struct platform_device *pdev)
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;
+ atxdmac->dma.src_addr_widths = AT_XDMAC_DMA_BUSWIDTHS;
+ atxdmac->dma.dst_addr_widths = AT_XDMAC_DMA_BUSWIDTHS;
+ atxdmac->dma.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+ atxdmac->dma.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
/* Disable all chans and interrupts. */
at_xdmac_off(atxdmac);
--
2.0.3
^ permalink raw reply related [flat|nested] 8+ messages in thread