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path: root/drivers/dma/k3dma.c
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Diffstat (limited to 'drivers/dma/k3dma.c')
-rw-r--r--drivers/dma/k3dma.c61
1 files changed, 52 insertions, 9 deletions
diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c
index fdec2b6cfbb0..5737d92eaeeb 100644
--- a/drivers/dma/k3dma.c
+++ b/drivers/dma/k3dma.c
@@ -52,8 +52,6 @@
#define CX_SRC 0x814
#define CX_DST 0x818
#define CX_CFG 0x81c
-#define AXI_CFG 0x820
-#define AXI_CFG_DEFAULT 0x201201
#define CX_LLI_CHAIN_EN 0x2
#define CX_CFG_EN 0x1
@@ -113,9 +111,18 @@ struct k3_dma_dev {
struct dma_pool *pool;
u32 dma_channels;
u32 dma_requests;
+ u32 dma_channel_mask;
unsigned int irq;
};
+
+#define K3_FLAG_NOCLK BIT(1)
+
+struct k3dma_soc_data {
+ unsigned long flags;
+};
+
+
#define to_k3_dma(dmadev) container_of(dmadev, struct k3_dma_dev, slave)
static int k3_dma_config_write(struct dma_chan *chan,
@@ -161,7 +168,6 @@ static void k3_dma_set_desc(struct k3_dma_phy *phy, struct k3_desc_hw *hw)
writel_relaxed(hw->count, phy->base + CX_CNT0);
writel_relaxed(hw->saddr, phy->base + CX_SRC);
writel_relaxed(hw->daddr, phy->base + CX_DST);
- writel_relaxed(AXI_CFG_DEFAULT, phy->base + AXI_CFG);
writel_relaxed(hw->config, phy->base + CX_CFG);
}
@@ -314,6 +320,9 @@ static void k3_dma_tasklet(unsigned long arg)
/* check new channel request in d->chan_pending */
spin_lock_irq(&d->lock);
for (pch = 0; pch < d->dma_channels; pch++) {
+ if (!(d->dma_channel_mask & (1 << pch)))
+ continue;
+
p = &d->phy[pch];
if (p->vchan == NULL && !list_empty(&d->chan_pending)) {
@@ -331,6 +340,9 @@ static void k3_dma_tasklet(unsigned long arg)
spin_unlock_irq(&d->lock);
for (pch = 0; pch < d->dma_channels; pch++) {
+ if (!(d->dma_channel_mask & (1 << pch)))
+ continue;
+
if (pch_alloc & (1 << pch)) {
p = &d->phy[pch];
c = p->vchan;
@@ -790,8 +802,21 @@ static int k3_dma_transfer_resume(struct dma_chan *chan)
return 0;
}
+static const struct k3dma_soc_data k3_v1_dma_data = {
+ .flags = 0,
+};
+
+static const struct k3dma_soc_data asp_v1_dma_data = {
+ .flags = K3_FLAG_NOCLK,
+};
+
static const struct of_device_id k3_pdma_dt_ids[] = {
- { .compatible = "hisilicon,k3-dma-1.0", },
+ { .compatible = "hisilicon,k3-dma-1.0",
+ .data = &k3_v1_dma_data
+ },
+ { .compatible = "hisilicon,hisi-pcm-asp-dma-1.0",
+ .data = &asp_v1_dma_data
+ },
{}
};
MODULE_DEVICE_TABLE(of, k3_pdma_dt_ids);
@@ -810,6 +835,7 @@ static struct dma_chan *k3_of_dma_simple_xlate(struct of_phandle_args *dma_spec,
static int k3_dma_probe(struct platform_device *op)
{
+ const struct k3dma_soc_data *soc_data;
struct k3_dma_dev *d;
const struct of_device_id *of_id;
struct resource *iores;
@@ -823,6 +849,10 @@ static int k3_dma_probe(struct platform_device *op)
if (!d)
return -ENOMEM;
+ soc_data = device_get_match_data(&op->dev);
+ if (!soc_data)
+ return -EINVAL;
+
d->base = devm_ioremap_resource(&op->dev, iores);
if (IS_ERR(d->base))
return PTR_ERR(d->base);
@@ -833,12 +863,21 @@ static int k3_dma_probe(struct platform_device *op)
"dma-channels", &d->dma_channels);
of_property_read_u32((&op->dev)->of_node,
"dma-requests", &d->dma_requests);
+ ret = of_property_read_u32((&op->dev)->of_node,
+ "dma-channel-mask", &d->dma_channel_mask);
+ if (ret) {
+ dev_warn(&op->dev,
+ "dma-channel-mask doesn't exist, considering all as available.\n");
+ d->dma_channel_mask = (u32)~0UL;
+ }
}
- d->clk = devm_clk_get(&op->dev, NULL);
- if (IS_ERR(d->clk)) {
- dev_err(&op->dev, "no dma clk\n");
- return PTR_ERR(d->clk);
+ if (!(soc_data->flags & K3_FLAG_NOCLK)) {
+ d->clk = devm_clk_get(&op->dev, NULL);
+ if (IS_ERR(d->clk)) {
+ dev_err(&op->dev, "no dma clk\n");
+ return PTR_ERR(d->clk);
+ }
}
irq = platform_get_irq(op, 0);
@@ -862,8 +901,12 @@ static int k3_dma_probe(struct platform_device *op)
return -ENOMEM;
for (i = 0; i < d->dma_channels; i++) {
- struct k3_dma_phy *p = &d->phy[i];
+ struct k3_dma_phy *p;
+
+ if (!(d->dma_channel_mask & BIT(i)))
+ continue;
+ p = &d->phy[i];
p->idx = i;
p->base = d->base + i * 0x40;
}