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-rw-r--r--drivers/dma/imx-dma.c26
-rw-r--r--drivers/dma/imx-sdma.c60
2 files changed, 57 insertions, 29 deletions
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index e53d438142b..e18eaabe92b 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -49,6 +49,7 @@ struct imxdma_channel {
struct imxdma_engine {
struct device *dev;
+ struct device_dma_parameters dma_parms;
struct dma_device dma_device;
struct imxdma_channel channel[MAX_DMA_CHANNELS];
};
@@ -242,6 +243,21 @@ static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
else
dmamode = DMA_MODE_WRITE;
+ switch (imxdmac->word_size) {
+ case DMA_SLAVE_BUSWIDTH_4_BYTES:
+ if (sgl->length & 3 || sgl->dma_address & 3)
+ return NULL;
+ break;
+ case DMA_SLAVE_BUSWIDTH_2_BYTES:
+ if (sgl->length & 1 || sgl->dma_address & 1)
+ return NULL;
+ break;
+ case DMA_SLAVE_BUSWIDTH_1_BYTE:
+ break;
+ default:
+ return NULL;
+ }
+
ret = imx_dma_setup_sg(imxdmac->imxdma_channel, sgl, sg_len,
dma_length, imxdmac->per_address, dmamode);
if (ret)
@@ -329,6 +345,9 @@ static int __init imxdma_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&imxdma->dma_device.channels);
+ dma_cap_set(DMA_SLAVE, imxdma->dma_device.cap_mask);
+ dma_cap_set(DMA_CYCLIC, imxdma->dma_device.cap_mask);
+
/* Initialize channel parameters */
for (i = 0; i < MAX_DMA_CHANNELS; i++) {
struct imxdma_channel *imxdmac = &imxdma->channel[i];
@@ -346,11 +365,7 @@ static int __init imxdma_probe(struct platform_device *pdev)
imxdmac->imxdma = imxdma;
spin_lock_init(&imxdmac->lock);
- dma_cap_set(DMA_SLAVE, imxdma->dma_device.cap_mask);
- dma_cap_set(DMA_CYCLIC, imxdma->dma_device.cap_mask);
-
imxdmac->chan.device = &imxdma->dma_device;
- imxdmac->chan.chan_id = i;
imxdmac->channel = i;
/* Add the channel to the DMAC list */
@@ -370,6 +385,9 @@ static int __init imxdma_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, imxdma);
+ imxdma->dma_device.dev->dma_parms = &imxdma->dma_parms;
+ dma_set_max_seg_size(imxdma->dma_device.dev, 0xffffff);
+
ret = dma_async_device_register(&imxdma->dma_device);
if (ret) {
dev_err(&pdev->dev, "unable to register\n");
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 4535f98b355..0123740b973 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -230,7 +230,7 @@ struct sdma_engine;
* struct sdma_channel - housekeeping for a SDMA channel
*
* @sdma pointer to the SDMA engine for this channel
- * @channel the channel number, matches dmaengine chan_id
+ * @channel the channel number, matches dmaengine chan_id + 1
* @direction transfer type. Needed for setting SDMA script
* @peripheral_type Peripheral type. Needed for setting SDMA script
* @event_id0 aka dma request line
@@ -301,6 +301,7 @@ struct sdma_firmware_header {
struct sdma_engine {
struct device *dev;
+ struct device_dma_parameters dma_parms;
struct sdma_channel channel[MAX_DMA_CHANNELS];
struct sdma_channel_control *channel_control;
void __iomem *regs;
@@ -798,7 +799,7 @@ static dma_cookie_t sdma_tx_submit(struct dma_async_tx_descriptor *tx)
cookie = sdma_assign_cookie(sdmac);
- sdma_enable_channel(sdma, tx->chan->chan_id);
+ sdma_enable_channel(sdma, sdmac->channel);
spin_unlock_irq(&sdmac->lock);
@@ -811,10 +812,6 @@ static int sdma_alloc_chan_resources(struct dma_chan *chan)
struct imx_dma_data *data = chan->private;
int prio, ret;
- /* No need to execute this for internal channel 0 */
- if (chan->chan_id == 0)
- return 0;
-
if (!data)
return -EINVAL;
@@ -879,7 +876,7 @@ static struct dma_async_tx_descriptor *sdma_prep_slave_sg(
struct sdma_channel *sdmac = to_sdma_chan(chan);
struct sdma_engine *sdma = sdmac->sdma;
int ret, i, count;
- int channel = chan->chan_id;
+ int channel = sdmac->channel;
struct scatterlist *sg;
if (sdmac->status == DMA_IN_PROGRESS)
@@ -924,10 +921,24 @@ static struct dma_async_tx_descriptor *sdma_prep_slave_sg(
ret = -EINVAL;
goto err_out;
}
- if (sdmac->word_size == DMA_SLAVE_BUSWIDTH_4_BYTES)
+
+ switch (sdmac->word_size) {
+ case DMA_SLAVE_BUSWIDTH_4_BYTES:
bd->mode.command = 0;
- else
- bd->mode.command = sdmac->word_size;
+ if (count & 3 || sg->dma_address & 3)
+ return NULL;
+ break;
+ case DMA_SLAVE_BUSWIDTH_2_BYTES:
+ bd->mode.command = 2;
+ if (count & 1 || sg->dma_address & 1)
+ return NULL;
+ break;
+ case DMA_SLAVE_BUSWIDTH_1_BYTE:
+ bd->mode.command = 1;
+ break;
+ default:
+ return NULL;
+ }
param = BD_DONE | BD_EXTD | BD_CONT;
@@ -961,7 +972,7 @@ static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
struct sdma_channel *sdmac = to_sdma_chan(chan);
struct sdma_engine *sdma = sdmac->sdma;
int num_periods = buf_len / period_len;
- int channel = chan->chan_id;
+ int channel = sdmac->channel;
int ret, i = 0, buf = 0;
dev_dbg(sdma->dev, "%s channel: %d\n", __func__, channel);
@@ -1233,7 +1244,6 @@ static int __init sdma_probe(struct platform_device *pdev)
struct resource *iores;
struct sdma_platform_data *pdata = pdev->dev.platform_data;
int i;
- dma_cap_mask_t mask;
struct sdma_engine *sdma;
sdma = kzalloc(sizeof(*sdma), GFP_KERNEL);
@@ -1276,6 +1286,9 @@ static int __init sdma_probe(struct platform_device *pdev)
sdma->version = pdata->sdma_version;
+ dma_cap_set(DMA_SLAVE, sdma->dma_device.cap_mask);
+ dma_cap_set(DMA_CYCLIC, sdma->dma_device.cap_mask);
+
INIT_LIST_HEAD(&sdma->dma_device.channels);
/* Initialize channel parameters */
for (i = 0; i < MAX_DMA_CHANNELS; i++) {
@@ -1284,15 +1297,17 @@ static int __init sdma_probe(struct platform_device *pdev)
sdmac->sdma = sdma;
spin_lock_init(&sdmac->lock);
- dma_cap_set(DMA_SLAVE, sdma->dma_device.cap_mask);
- dma_cap_set(DMA_CYCLIC, sdma->dma_device.cap_mask);
-
sdmac->chan.device = &sdma->dma_device;
- sdmac->chan.chan_id = i;
sdmac->channel = i;
- /* Add the channel to the DMAC list */
- list_add_tail(&sdmac->chan.device_node, &sdma->dma_device.channels);
+ /*
+ * Add the channel to the DMAC list. Do not add channel 0 though
+ * because we need it internally in the SDMA driver. This also means
+ * that channel 0 in dmaengine counting matches sdma channel 1.
+ */
+ if (i)
+ list_add_tail(&sdmac->chan.device_node,
+ &sdma->dma_device.channels);
}
ret = sdma_init(sdma);
@@ -1313,6 +1328,8 @@ static int __init sdma_probe(struct platform_device *pdev)
sdma->dma_device.device_prep_dma_cyclic = sdma_prep_dma_cyclic;
sdma->dma_device.device_control = sdma_control;
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);
ret = dma_async_device_register(&sdma->dma_device);
if (ret) {
@@ -1320,13 +1337,6 @@ static int __init sdma_probe(struct platform_device *pdev)
goto err_init;
}
- /* request channel 0. This is an internal control channel
- * to the SDMA engine and not available to clients.
- */
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
- dma_request_channel(mask, NULL, NULL);
-
dev_info(sdma->dev, "initialized\n");
return 0;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-11 23:37:39 +0000