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path: root/drivers/dma/imx-sdma.c
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Diffstat (limited to 'drivers/dma/imx-sdma.c')
-rw-r--r--drivers/dma/imx-sdma.c132
1 files changed, 50 insertions, 82 deletions
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index d2432c90a56..18c0a131e4e 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -830,20 +830,29 @@ static int sdma_load_context(struct sdma_channel *sdmac)
return ret;
}
-static void sdma_disable_channel(struct sdma_channel *sdmac)
+static struct sdma_channel *to_sdma_chan(struct dma_chan *chan)
+{
+ return container_of(chan, struct sdma_channel, chan);
+}
+
+static int sdma_disable_channel(struct dma_chan *chan)
{
+ struct sdma_channel *sdmac = to_sdma_chan(chan);
struct sdma_engine *sdma = sdmac->sdma;
int channel = sdmac->channel;
writel_relaxed(BIT(channel), sdma->regs + SDMA_H_STATSTOP);
sdmac->status = DMA_ERROR;
+
+ return 0;
}
-static int sdma_config_channel(struct sdma_channel *sdmac)
+static int sdma_config_channel(struct dma_chan *chan)
{
+ struct sdma_channel *sdmac = to_sdma_chan(chan);
int ret;
- sdma_disable_channel(sdmac);
+ sdma_disable_channel(chan);
sdmac->event_mask[0] = 0;
sdmac->event_mask[1] = 0;
@@ -935,11 +944,6 @@ out:
return ret;
}
-static struct sdma_channel *to_sdma_chan(struct dma_chan *chan)
-{
- return container_of(chan, struct sdma_channel, chan);
-}
-
static dma_cookie_t sdma_tx_submit(struct dma_async_tx_descriptor *tx)
{
unsigned long flags;
@@ -1004,7 +1008,7 @@ static void sdma_free_chan_resources(struct dma_chan *chan)
struct sdma_channel *sdmac = to_sdma_chan(chan);
struct sdma_engine *sdma = sdmac->sdma;
- sdma_disable_channel(sdmac);
+ sdma_disable_channel(chan);
if (sdmac->event_id0)
sdma_event_disable(sdmac, sdmac->event_id0);
@@ -1203,35 +1207,24 @@ err_out:
return NULL;
}
-static int sdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
- unsigned long arg)
+static int sdma_config(struct dma_chan *chan,
+ struct dma_slave_config *dmaengine_cfg)
{
struct sdma_channel *sdmac = to_sdma_chan(chan);
- struct dma_slave_config *dmaengine_cfg = (void *)arg;
-
- switch (cmd) {
- case DMA_TERMINATE_ALL:
- sdma_disable_channel(sdmac);
- return 0;
- case DMA_SLAVE_CONFIG:
- if (dmaengine_cfg->direction == DMA_DEV_TO_MEM) {
- sdmac->per_address = dmaengine_cfg->src_addr;
- sdmac->watermark_level = dmaengine_cfg->src_maxburst *
- dmaengine_cfg->src_addr_width;
- sdmac->word_size = dmaengine_cfg->src_addr_width;
- } else {
- sdmac->per_address = dmaengine_cfg->dst_addr;
- sdmac->watermark_level = dmaengine_cfg->dst_maxburst *
- dmaengine_cfg->dst_addr_width;
- sdmac->word_size = dmaengine_cfg->dst_addr_width;
- }
- sdmac->direction = dmaengine_cfg->direction;
- return sdma_config_channel(sdmac);
- default:
- return -ENOSYS;
- }
- return -EINVAL;
+ if (dmaengine_cfg->direction == DMA_DEV_TO_MEM) {
+ sdmac->per_address = dmaengine_cfg->src_addr;
+ sdmac->watermark_level = dmaengine_cfg->src_maxburst *
+ dmaengine_cfg->src_addr_width;
+ sdmac->word_size = dmaengine_cfg->src_addr_width;
+ } else {
+ sdmac->per_address = dmaengine_cfg->dst_addr;
+ sdmac->watermark_level = dmaengine_cfg->dst_maxburst *
+ dmaengine_cfg->dst_addr_width;
+ sdmac->word_size = dmaengine_cfg->dst_addr_width;
+ }
+ sdmac->direction = dmaengine_cfg->direction;
+ return sdma_config_channel(chan);
}
static enum dma_status sdma_tx_status(struct dma_chan *chan,
@@ -1479,7 +1472,7 @@ static int sdma_probe(struct platform_device *pdev)
if (ret)
return ret;
- sdma = kzalloc(sizeof(*sdma), GFP_KERNEL);
+ sdma = devm_kzalloc(&pdev->dev, sizeof(*sdma), GFP_KERNEL);
if (!sdma)
return -ENOMEM;
@@ -1488,48 +1481,34 @@ static int sdma_probe(struct platform_device *pdev)
sdma->dev = &pdev->dev;
sdma->drvdata = drvdata;
- iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
- if (!iores || irq < 0) {
- ret = -EINVAL;
- goto err_irq;
- }
+ if (irq < 0)
+ return irq;
- if (!request_mem_region(iores->start, resource_size(iores), pdev->name)) {
- ret = -EBUSY;
- goto err_request_region;
- }
+ iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ sdma->regs = devm_ioremap_resource(&pdev->dev, iores);
+ if (IS_ERR(sdma->regs))
+ return PTR_ERR(sdma->regs);
sdma->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
- if (IS_ERR(sdma->clk_ipg)) {
- ret = PTR_ERR(sdma->clk_ipg);
- goto err_clk;
- }
+ if (IS_ERR(sdma->clk_ipg))
+ return PTR_ERR(sdma->clk_ipg);
sdma->clk_ahb = devm_clk_get(&pdev->dev, "ahb");
- if (IS_ERR(sdma->clk_ahb)) {
- ret = PTR_ERR(sdma->clk_ahb);
- goto err_clk;
- }
+ if (IS_ERR(sdma->clk_ahb))
+ return PTR_ERR(sdma->clk_ahb);
clk_prepare(sdma->clk_ipg);
clk_prepare(sdma->clk_ahb);
- sdma->regs = ioremap(iores->start, resource_size(iores));
- if (!sdma->regs) {
- ret = -ENOMEM;
- goto err_ioremap;
- }
-
- ret = request_irq(irq, sdma_int_handler, 0, "sdma", sdma);
+ ret = devm_request_irq(&pdev->dev, irq, sdma_int_handler, 0, "sdma",
+ sdma);
if (ret)
- goto err_request_irq;
+ return ret;
sdma->script_addrs = kzalloc(sizeof(*sdma->script_addrs), GFP_KERNEL);
- if (!sdma->script_addrs) {
- ret = -ENOMEM;
- goto err_alloc;
- }
+ if (!sdma->script_addrs)
+ return -ENOMEM;
/* initially no scripts available */
saddr_arr = (s32 *)sdma->script_addrs;
@@ -1600,7 +1579,12 @@ static int sdma_probe(struct platform_device *pdev)
sdma->dma_device.device_tx_status = sdma_tx_status;
sdma->dma_device.device_prep_slave_sg = sdma_prep_slave_sg;
sdma->dma_device.device_prep_dma_cyclic = sdma_prep_dma_cyclic;
- sdma->dma_device.device_control = sdma_control;
+ sdma->dma_device.device_config = sdma_config;
+ sdma->dma_device.device_terminate_all = sdma_disable_channel;
+ sdma->dma_device.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
+ sdma->dma_device.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
+ sdma->dma_device.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+ sdma->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
sdma->dma_device.device_issue_pending = sdma_issue_pending;
sdma->dma_device.dev->dma_parms = &sdma->dma_parms;
dma_set_max_seg_size(sdma->dma_device.dev, 65535);
@@ -1629,38 +1613,22 @@ err_register:
dma_async_device_unregister(&sdma->dma_device);
err_init:
kfree(sdma->script_addrs);
-err_alloc:
- free_irq(irq, sdma);
-err_request_irq:
- iounmap(sdma->regs);
-err_ioremap:
-err_clk:
- release_mem_region(iores->start, resource_size(iores));
-err_request_region:
-err_irq:
- kfree(sdma);
return ret;
}
static int sdma_remove(struct platform_device *pdev)
{
struct sdma_engine *sdma = platform_get_drvdata(pdev);
- struct resource *iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- int irq = platform_get_irq(pdev, 0);
int i;
dma_async_device_unregister(&sdma->dma_device);
kfree(sdma->script_addrs);
- free_irq(irq, sdma);
- iounmap(sdma->regs);
- release_mem_region(iores->start, resource_size(iores));
/* Kill the tasklet */
for (i = 0; i < MAX_DMA_CHANNELS; i++) {
struct sdma_channel *sdmac = &sdma->channel[i];
tasklet_kill(&sdmac->tasklet);
}
- kfree(sdma);
platform_set_drvdata(pdev, NULL);
dev_info(&pdev->dev, "Removed...\n");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-21 01:17:57 +0000