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path: root/drivers/dma/pl330.c
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Diffstat (limited to 'drivers/dma/pl330.c')
-rw-r--r--drivers/dma/pl330.c99
1 files changed, 53 insertions, 46 deletions
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 571041477ab2..a626e15799a5 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -19,6 +19,7 @@
#include <linux/amba/pl330.h>
#include <linux/pm_runtime.h>
#include <linux/scatterlist.h>
+#include <linux/of.h>
#define NR_DEFAULT_DESC 16
@@ -116,6 +117,9 @@ struct dma_pl330_desc {
struct dma_pl330_chan *pchan;
};
+/* forward declaration */
+static struct amba_driver pl330_driver;
+
static inline struct dma_pl330_chan *
to_pchan(struct dma_chan *ch)
{
@@ -267,6 +271,32 @@ static void dma_pl330_rqcb(void *token, enum pl330_op_err err)
tasklet_schedule(&pch->task);
}
+bool pl330_filter(struct dma_chan *chan, void *param)
+{
+ u8 *peri_id;
+
+ if (chan->device->dev->driver != &pl330_driver.drv)
+ return false;
+
+#ifdef CONFIG_OF
+ if (chan->device->dev->of_node) {
+ const __be32 *prop_value;
+ phandle phandle;
+ struct device_node *node;
+
+ prop_value = ((struct property *)param)->value;
+ phandle = be32_to_cpup(prop_value++);
+ node = of_find_node_by_phandle(phandle);
+ return ((chan->private == node) &&
+ (chan->chan_id == be32_to_cpup(prop_value)));
+ }
+#endif
+
+ peri_id = chan->private;
+ return *peri_id == (unsigned)param;
+}
+EXPORT_SYMBOL(pl330_filter);
+
static int pl330_alloc_chan_resources(struct dma_chan *chan)
{
struct dma_pl330_chan *pch = to_pchan(chan);
@@ -497,7 +527,7 @@ pluck_desc(struct dma_pl330_dmac *pdmac)
static struct dma_pl330_desc *pl330_get_desc(struct dma_pl330_chan *pch)
{
struct dma_pl330_dmac *pdmac = pch->dmac;
- struct dma_pl330_peri *peri = pch->chan.private;
+ u8 *peri_id = pch->chan.private;
struct dma_pl330_desc *desc;
/* Pluck one desc from the pool of DMAC */
@@ -522,13 +552,7 @@ static struct dma_pl330_desc *pl330_get_desc(struct dma_pl330_chan *pch)
desc->txd.cookie = 0;
async_tx_ack(&desc->txd);
- if (peri) {
- desc->req.rqtype = peri->rqtype;
- desc->req.peri = pch->chan.chan_id;
- } else {
- desc->req.rqtype = MEMTOMEM;
- desc->req.peri = 0;
- }
+ desc->req.peri = peri_id ? pch->chan.chan_id : 0;
dma_async_tx_descriptor_init(&desc->txd, &pch->chan);
@@ -615,12 +639,14 @@ static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
case DMA_TO_DEVICE:
desc->rqcfg.src_inc = 1;
desc->rqcfg.dst_inc = 0;
+ desc->req.rqtype = MEMTODEV;
src = dma_addr;
dst = pch->fifo_addr;
break;
case DMA_FROM_DEVICE:
desc->rqcfg.src_inc = 0;
desc->rqcfg.dst_inc = 1;
+ desc->req.rqtype = DEVTOMEM;
src = pch->fifo_addr;
dst = dma_addr;
break;
@@ -646,16 +672,12 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
{
struct dma_pl330_desc *desc;
struct dma_pl330_chan *pch = to_pchan(chan);
- struct dma_pl330_peri *peri = chan->private;
struct pl330_info *pi;
int burst;
if (unlikely(!pch || !len))
return NULL;
- if (peri && peri->rqtype != MEMTOMEM)
- return NULL;
-
pi = &pch->dmac->pif;
desc = __pl330_prep_dma_memcpy(pch, dst, src, len);
@@ -664,6 +686,7 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
desc->rqcfg.src_inc = 1;
desc->rqcfg.dst_inc = 1;
+ desc->req.rqtype = MEMTOMEM;
/* Select max possible burst size */
burst = pi->pcfg.data_bus_width / 8;
@@ -692,25 +715,14 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
{
struct dma_pl330_desc *first, *desc = NULL;
struct dma_pl330_chan *pch = to_pchan(chan);
- struct dma_pl330_peri *peri = chan->private;
struct scatterlist *sg;
unsigned long flags;
int i;
dma_addr_t addr;
- if (unlikely(!pch || !sgl || !sg_len || !peri))
+ if (unlikely(!pch || !sgl || !sg_len))
return NULL;
- /* Make sure the direction is consistent */
- if ((direction == DMA_TO_DEVICE &&
- peri->rqtype != MEMTODEV) ||
- (direction == DMA_FROM_DEVICE &&
- peri->rqtype != DEVTOMEM)) {
- dev_err(pch->dmac->pif.dev, "%s:%d Invalid Direction\n",
- __func__, __LINE__);
- return NULL;
- }
-
addr = pch->fifo_addr;
first = NULL;
@@ -750,11 +762,13 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
if (direction == DMA_TO_DEVICE) {
desc->rqcfg.src_inc = 1;
desc->rqcfg.dst_inc = 0;
+ desc->req.rqtype = MEMTODEV;
fill_px(&desc->px,
addr, sg_dma_address(sg), sg_dma_len(sg));
} else {
desc->rqcfg.src_inc = 0;
desc->rqcfg.dst_inc = 1;
+ desc->req.rqtype = DEVTOMEM;
fill_px(&desc->px,
sg_dma_address(sg), addr, sg_dma_len(sg));
}
@@ -856,32 +870,16 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
INIT_LIST_HEAD(&pd->channels);
/* Initialize channel parameters */
- num_chan = max(pdat ? pdat->nr_valid_peri : 0, (u8)pi->pcfg.num_chan);
+ num_chan = max(pdat ? pdat->nr_valid_peri : (u8)pi->pcfg.num_peri,
+ (u8)pi->pcfg.num_chan);
pdmac->peripherals = kzalloc(num_chan * sizeof(*pch), GFP_KERNEL);
for (i = 0; i < num_chan; i++) {
pch = &pdmac->peripherals[i];
- if (pdat) {
- struct dma_pl330_peri *peri = &pdat->peri[i];
-
- switch (peri->rqtype) {
- case MEMTOMEM:
- dma_cap_set(DMA_MEMCPY, pd->cap_mask);
- break;
- case MEMTODEV:
- case DEVTOMEM:
- dma_cap_set(DMA_SLAVE, pd->cap_mask);
- dma_cap_set(DMA_CYCLIC, pd->cap_mask);
- break;
- default:
- dev_err(&adev->dev, "DEVTODEV Not Supported\n");
- continue;
- }
- pch->chan.private = peri;
- } else {
- dma_cap_set(DMA_MEMCPY, pd->cap_mask);
- pch->chan.private = NULL;
- }
+ if (!adev->dev.of_node)
+ pch->chan.private = pdat ? &pdat->peri_id[i] : NULL;
+ else
+ pch->chan.private = adev->dev.of_node;
INIT_LIST_HEAD(&pch->work_list);
spin_lock_init(&pch->lock);
@@ -894,6 +892,15 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
}
pd->dev = &adev->dev;
+ if (pdat) {
+ pd->cap_mask = pdat->cap_mask;
+ } else {
+ dma_cap_set(DMA_MEMCPY, pd->cap_mask);
+ if (pi->pcfg.num_peri) {
+ dma_cap_set(DMA_SLAVE, pd->cap_mask);
+ dma_cap_set(DMA_CYCLIC, pd->cap_mask);
+ }
+ }
pd->device_alloc_chan_resources = pl330_alloc_chan_resources;
pd->device_free_chan_resources = pl330_free_chan_resources;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 20:41:19 +0000