Hi,
This series has been first proposed by Jernej Skrabec[1].
As this series is mandatory for SPDIF/I2S support and because he is
busy on Cedrus stuff. I asked him to make the minor change requested
and repost it.
Authorship remains to him.
I have tested this series with SPDIF driver and added a patch to enable
DMA_SUN6I_CONFIG for arm64.
Original Post:
"
DMA engine engine on H6 almost the same as on older SoCs. The biggest
difference is that it has slightly rearranged bits in registers and
it needs additional clock, probably due to iommu.
These patches were tested with I2S connected to HDMI. I2S needs
additional patches which will be sent later.
Please take a look.
Best regards,
Jernej
"
Thanks,
Clément
Changes since v1:
- Enable DMA_SUN6I in arm64 defconfig
- Change mbus_clk to has_mbus_clk
- Collect Rob H. reviewed-by
Clément Péron (1):
arm64: defconfig: enable Allwinner DMA drivers
Jernej Skrabec (6):
dt-bindings: arm64: allwinner: h6: Add binding for DMA controller
dmaengine: sun6i: Add a quirk for additional mbus clock
dmaengine: sun6i: Add a quirk for setting DRQ fields
dmaengine: sun6i: Add a quirk for setting mode fields
dmaengine: sun6i: Add support for H6 DMA
arm64: dts: allwinner: h6: Add DMA node
.../devicetree/bindings/dma/sun6i-dma.txt | 9 +-
arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 12 ++
arch/arm64/configs/defconfig | 1 +
drivers/dma/sun6i-dma.c | 147 +++++++++++++-----
4 files changed, 132 insertions(+), 37 deletions(-)
--
2.20.1
From: Jernej Skrabec <[email protected]>
H6 DMA controller needs additional mbus clock to be enabled.
Add a quirk for it and handle it accordingly.
Signed-off-by: Jernej Skrabec <[email protected]>
Signed-off-by: Clément Péron <[email protected]>
---
drivers/dma/sun6i-dma.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index 0cd13f17fc11..7d9606997251 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -129,6 +129,7 @@ struct sun6i_dma_config {
u32 dst_burst_lengths;
u32 src_addr_widths;
u32 dst_addr_widths;
+ bool has_mbus_clk;
};
/*
@@ -182,6 +183,7 @@ struct sun6i_dma_dev {
struct dma_device slave;
void __iomem *base;
struct clk *clk;
+ struct clk *clk_mbus;
int irq;
spinlock_t lock;
struct reset_control *rstc;
@@ -1208,6 +1210,14 @@ static int sun6i_dma_probe(struct platform_device *pdev)
return PTR_ERR(sdc->clk);
}
+ if (sdc->cfg->has_mbus_clk) {
+ sdc->clk_mbus = devm_clk_get(&pdev->dev, "mbus");
+ if (IS_ERR(sdc->clk_mbus)) {
+ dev_err(&pdev->dev, "No mbus clock specified\n");
+ return PTR_ERR(sdc->clk_mbus);
+ }
+ }
+
sdc->rstc = devm_reset_control_get(&pdev->dev, NULL);
if (IS_ERR(sdc->rstc)) {
dev_err(&pdev->dev, "No reset controller specified\n");
@@ -1312,11 +1322,19 @@ static int sun6i_dma_probe(struct platform_device *pdev)
goto err_reset_assert;
}
+ if (sdc->cfg->has_mbus_clk) {
+ ret = clk_prepare_enable(sdc->clk_mbus);
+ if (ret) {
+ dev_err(&pdev->dev, "Couldn't enable mbus clock\n");
+ goto err_clk_disable;
+ }
+ }
+
ret = devm_request_irq(&pdev->dev, sdc->irq, sun6i_dma_interrupt, 0,
dev_name(&pdev->dev), sdc);
if (ret) {
dev_err(&pdev->dev, "Cannot request IRQ\n");
- goto err_clk_disable;
+ goto err_mbus_clk_disable;
}
ret = dma_async_device_register(&sdc->slave);
@@ -1341,6 +1359,8 @@ static int sun6i_dma_probe(struct platform_device *pdev)
dma_async_device_unregister(&sdc->slave);
err_irq_disable:
sun6i_kill_tasklet(sdc);
+err_mbus_clk_disable:
+ clk_disable_unprepare(sdc->clk_mbus);
err_clk_disable:
clk_disable_unprepare(sdc->clk);
err_reset_assert:
@@ -1359,6 +1379,7 @@ static int sun6i_dma_remove(struct platform_device *pdev)
sun6i_kill_tasklet(sdc);
+ clk_disable_unprepare(sdc->clk_mbus);
clk_disable_unprepare(sdc->clk);
reset_control_assert(sdc->rstc);
--
2.20.1
From: Jernej Skrabec <[email protected]>
DMA in H6 is similar to other DMA controller, except it is first which
supports more than 32 request sources and has 16 channels. It also needs
additional clock to be enabled.
Signed-off-by: Jernej Skrabec <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Signed-off-by: Clément Péron <[email protected]>
---
Documentation/devicetree/bindings/dma/sun6i-dma.txt | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/dma/sun6i-dma.txt b/Documentation/devicetree/bindings/dma/sun6i-dma.txt
index 7fccc20d8331..cae31f4e77ba 100644
--- a/Documentation/devicetree/bindings/dma/sun6i-dma.txt
+++ b/Documentation/devicetree/bindings/dma/sun6i-dma.txt
@@ -28,12 +28,17 @@ Example:
};
------------------------------------------------------------------------------
-For A64 DMA controller:
+For A64 and H6 DMA controller:
Required properties:
-- compatible: "allwinner,sun50i-a64-dma"
+- compatible: Must be one of
+ "allwinner,sun50i-a64-dma"
+ "allwinner,sun50i-h6-dma"
- dma-channels: Number of DMA channels supported by the controller.
Refer to Documentation/devicetree/bindings/dma/dma.txt
+- clocks: In addition to parent AHB clock, it should also contain mbus
+ clock (H6 only)
+- clock-names: Should contain "bus" and "mbus" (H6 only)
- all properties above, i.e. reg, interrupts, clocks, resets and #dma-cells
Optional properties:
--
2.20.1
Allwinner sun6i DMA drivers is used on A64 and H6 boards.
Enable it as a module.
Signed-off-by: Clément Péron <[email protected]>
---
arch/arm64/configs/defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 4d583514258c..b535f0f412cc 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -614,6 +614,7 @@ CONFIG_RTC_DRV_IMX_SC=m
CONFIG_RTC_DRV_XGENE=y
CONFIG_DMADEVICES=y
CONFIG_DMA_BCM2835=m
+CONFIG_DMA_SUN6I=m
CONFIG_K3_DMA=y
CONFIG_MV_XOR=y
CONFIG_MV_XOR_V2=y
--
2.20.1
From: Jernej Skrabec <[email protected]>
H6 DMA has more than 32 supported DRQs, which means that configuration
register is slightly rearranged. It also needs additional clock to be
enabled.
Add support for it.
Signed-off-by: Jernej Skrabec <[email protected]>
Signed-off-by: Clément Péron <[email protected]>
---
drivers/dma/sun6i-dma.c | 44 +++++++++++++++++++++++++++++++++++++++--
1 file changed, 42 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index f5cb5e89bf7b..8d44ddae926a 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -69,14 +69,19 @@
#define DMA_CHAN_CUR_CFG 0x0c
#define DMA_CHAN_MAX_DRQ_A31 0x1f
+#define DMA_CHAN_MAX_DRQ_H6 0x3f
#define DMA_CHAN_CFG_SRC_DRQ_A31(x) ((x) & DMA_CHAN_MAX_DRQ_A31)
+#define DMA_CHAN_CFG_SRC_DRQ_H6(x) ((x) & DMA_CHAN_MAX_DRQ_H6)
#define DMA_CHAN_CFG_SRC_MODE_A31(x) (((x) & 0x1) << 5)
+#define DMA_CHAN_CFG_SRC_MODE_H6(x) (((x) & 0x1) << 8)
#define DMA_CHAN_CFG_SRC_BURST_A31(x) (((x) & 0x3) << 7)
#define DMA_CHAN_CFG_SRC_BURST_H3(x) (((x) & 0x3) << 6)
#define DMA_CHAN_CFG_SRC_WIDTH(x) (((x) & 0x3) << 9)
#define DMA_CHAN_CFG_DST_DRQ_A31(x) (DMA_CHAN_CFG_SRC_DRQ_A31(x) << 16)
+#define DMA_CHAN_CFG_DST_DRQ_H6(x) (DMA_CHAN_CFG_SRC_DRQ_H6(x) << 16)
#define DMA_CHAN_CFG_DST_MODE_A31(x) (DMA_CHAN_CFG_SRC_MODE_A31(x) << 16)
+#define DMA_CHAN_CFG_DST_MODE_H6(x) (DMA_CHAN_CFG_SRC_MODE_H6(x) << 16)
#define DMA_CHAN_CFG_DST_BURST_A31(x) (DMA_CHAN_CFG_SRC_BURST_A31(x) << 16)
#define DMA_CHAN_CFG_DST_BURST_H3(x) (DMA_CHAN_CFG_SRC_BURST_H3(x) << 16)
#define DMA_CHAN_CFG_DST_WIDTH(x) (DMA_CHAN_CFG_SRC_WIDTH(x) << 16)
@@ -319,12 +324,24 @@ static void sun6i_set_drq_a31(u32 *p_cfg, s8 src_drq, s8 dst_drq)
DMA_CHAN_CFG_DST_DRQ_A31(dst_drq);
}
+static void sun6i_set_drq_h6(u32 *p_cfg, s8 src_drq, s8 dst_drq)
+{
+ *p_cfg |= DMA_CHAN_CFG_SRC_DRQ_H6(src_drq) |
+ DMA_CHAN_CFG_DST_DRQ_H6(dst_drq);
+}
+
static void sun6i_set_mode_a31(u32 *p_cfg, s8 src_mode, s8 dst_mode)
{
*p_cfg |= DMA_CHAN_CFG_SRC_MODE_A31(src_mode) |
DMA_CHAN_CFG_DST_MODE_A31(dst_mode);
}
+static void sun6i_set_mode_h6(u32 *p_cfg, s8 src_mode, s8 dst_mode)
+{
+ *p_cfg |= DMA_CHAN_CFG_SRC_MODE_H6(src_mode) |
+ DMA_CHAN_CFG_DST_MODE_H6(dst_mode);
+}
+
static size_t sun6i_get_chan_size(struct sun6i_pchan *pchan)
{
struct sun6i_desc *txd = pchan->desc;
@@ -1160,6 +1177,28 @@ static struct sun6i_dma_config sun50i_a64_dma_cfg = {
BIT(DMA_SLAVE_BUSWIDTH_8_BYTES),
};
+/*
+ * The H6 binding uses the number of dma channels from the
+ * device tree node.
+ */
+static struct sun6i_dma_config sun50i_h6_dma_cfg = {
+ .clock_autogate_enable = sun6i_enable_clock_autogate_h3,
+ .set_burst_length = sun6i_set_burst_length_h3,
+ .set_drq = sun6i_set_drq_h6,
+ .set_mode = sun6i_set_mode_h6,
+ .src_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
+ .dst_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
+ .src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_8_BYTES),
+ .dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_8_BYTES),
+ .has_mbus_clk = true,
+};
+
/*
* The V3s have only 8 physical channels, a maximum DRQ port id of 23,
* and a total of 24 usable source and destination endpoints.
@@ -1190,6 +1229,7 @@ static const struct of_device_id sun6i_dma_match[] = {
{ .compatible = "allwinner,sun8i-h3-dma", .data = &sun8i_h3_dma_cfg },
{ .compatible = "allwinner,sun8i-v3s-dma", .data = &sun8i_v3s_dma_cfg },
{ .compatible = "allwinner,sun50i-a64-dma", .data = &sun50i_a64_dma_cfg },
+ { .compatible = "allwinner,sun50i-h6-dma", .data = &sun50i_h6_dma_cfg },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, sun6i_dma_match);
@@ -1288,8 +1328,8 @@ static int sun6i_dma_probe(struct platform_device *pdev)
ret = of_property_read_u32(np, "dma-requests", &sdc->max_request);
if (ret && !sdc->max_request) {
dev_info(&pdev->dev, "Missing dma-requests, using %u.\n",
- DMA_CHAN_MAX_DRQ_A31);
- sdc->max_request = DMA_CHAN_MAX_DRQ_A31;
+ DMA_CHAN_MAX_DRQ_H6);
+ sdc->max_request = DMA_CHAN_MAX_DRQ_H6;
}
/*
--
2.20.1
From: Jernej Skrabec <[email protected]>
H6 has DMA controller which supports 16 channels.
Add a node for it.
Signed-off-by: Jernej Skrabec <[email protected]>
Signed-off-by: Clément Péron <[email protected]>
---
arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
index 16c5c3d0fd81..f4ea596c82ce 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
@@ -208,6 +208,18 @@
reg = <0x03006000 0x400>;
};
+ dma: dma-controller@3002000 {
+ compatible = "allwinner,sun50i-h6-dma";
+ reg = <0x03002000 0x1000>;
+ interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&ccu CLK_BUS_DMA>, <&ccu CLK_MBUS_DMA>;
+ clock-names = "bus", "mbus";
+ dma-channels = <16>;
+ dma-requests = <46>;
+ resets = <&ccu RST_BUS_DMA>;
+ #dma-cells = <1>;
+ };
+
pio: pinctrl@300b000 {
compatible = "allwinner,sun50i-h6-pinctrl";
reg = <0x0300b000 0x400>;
--
2.20.1
From: Jernej Skrabec <[email protected]>
H6 DMA has more than 32 possible DRQs. That means that current maximum
of 31 DRQs is not enough anymore.
Add a quirk which will set source and destination DRQ number.
Signed-off-by: Jernej Skrabec <[email protected]>
Signed-off-by: Clément Péron <[email protected]>
---
drivers/dma/sun6i-dma.c | 48 ++++++++++++++++++++++++-----------------
1 file changed, 28 insertions(+), 20 deletions(-)
diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index 7d9606997251..f725b93fd21a 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -68,15 +68,15 @@
#define DMA_CHAN_LLI_ADDR 0x08
#define DMA_CHAN_CUR_CFG 0x0c
-#define DMA_CHAN_MAX_DRQ 0x1f
-#define DMA_CHAN_CFG_SRC_DRQ(x) ((x) & DMA_CHAN_MAX_DRQ)
+#define DMA_CHAN_MAX_DRQ_A31 0x1f
+#define DMA_CHAN_CFG_SRC_DRQ_A31(x) ((x) & DMA_CHAN_MAX_DRQ_A31)
#define DMA_CHAN_CFG_SRC_IO_MODE BIT(5)
#define DMA_CHAN_CFG_SRC_LINEAR_MODE (0 << 5)
#define DMA_CHAN_CFG_SRC_BURST_A31(x) (((x) & 0x3) << 7)
#define DMA_CHAN_CFG_SRC_BURST_H3(x) (((x) & 0x3) << 6)
#define DMA_CHAN_CFG_SRC_WIDTH(x) (((x) & 0x3) << 9)
-#define DMA_CHAN_CFG_DST_DRQ(x) (DMA_CHAN_CFG_SRC_DRQ(x) << 16)
+#define DMA_CHAN_CFG_DST_DRQ_A31(x) (DMA_CHAN_CFG_SRC_DRQ_A31(x) << 16)
#define DMA_CHAN_CFG_DST_IO_MODE (DMA_CHAN_CFG_SRC_IO_MODE << 16)
#define DMA_CHAN_CFG_DST_LINEAR_MODE (DMA_CHAN_CFG_SRC_LINEAR_MODE << 16)
#define DMA_CHAN_CFG_DST_BURST_A31(x) (DMA_CHAN_CFG_SRC_BURST_A31(x) << 16)
@@ -125,6 +125,7 @@ struct sun6i_dma_config {
*/
void (*clock_autogate_enable)(struct sun6i_dma_dev *);
void (*set_burst_length)(u32 *p_cfg, s8 src_burst, s8 dst_burst);
+ void (*set_drq)(u32 *p_cfg, s8 src_drq, s8 dst_drq);
u32 src_burst_lengths;
u32 dst_burst_lengths;
u32 src_addr_widths;
@@ -311,6 +312,12 @@ static void sun6i_set_burst_length_h3(u32 *p_cfg, s8 src_burst, s8 dst_burst)
DMA_CHAN_CFG_DST_BURST_H3(dst_burst);
}
+static void sun6i_set_drq_a31(u32 *p_cfg, s8 src_drq, s8 dst_drq)
+{
+ *p_cfg |= DMA_CHAN_CFG_SRC_DRQ_A31(src_drq) |
+ DMA_CHAN_CFG_DST_DRQ_A31(dst_drq);
+}
+
static size_t sun6i_get_chan_size(struct sun6i_pchan *pchan)
{
struct sun6i_desc *txd = pchan->desc;
@@ -634,14 +641,13 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_dma_memcpy(
burst = convert_burst(8);
width = convert_buswidth(DMA_SLAVE_BUSWIDTH_4_BYTES);
- v_lli->cfg = DMA_CHAN_CFG_SRC_DRQ(DRQ_SDRAM) |
- DMA_CHAN_CFG_DST_DRQ(DRQ_SDRAM) |
- DMA_CHAN_CFG_DST_LINEAR_MODE |
+ v_lli->cfg = DMA_CHAN_CFG_DST_LINEAR_MODE |
DMA_CHAN_CFG_SRC_LINEAR_MODE |
DMA_CHAN_CFG_SRC_WIDTH(width) |
DMA_CHAN_CFG_DST_WIDTH(width);
sdev->cfg->set_burst_length(&v_lli->cfg, burst, burst);
+ sdev->cfg->set_drq(&v_lli->cfg, DRQ_SDRAM, DRQ_SDRAM);
sun6i_dma_lli_add(NULL, v_lli, p_lli, txd);
@@ -695,9 +701,8 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_slave_sg(
v_lli->dst = sconfig->dst_addr;
v_lli->cfg = lli_cfg |
DMA_CHAN_CFG_DST_IO_MODE |
- DMA_CHAN_CFG_SRC_LINEAR_MODE |
- DMA_CHAN_CFG_SRC_DRQ(DRQ_SDRAM) |
- DMA_CHAN_CFG_DST_DRQ(vchan->port);
+ DMA_CHAN_CFG_SRC_LINEAR_MODE;
+ sdev->cfg->set_drq(&v_lli->cfg, DRQ_SDRAM, vchan->port);
dev_dbg(chan2dev(chan),
"%s; chan: %d, dest: %pad, src: %pad, len: %u. flags: 0x%08lx\n",
@@ -710,9 +715,8 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_slave_sg(
v_lli->dst = sg_dma_address(sg);
v_lli->cfg = lli_cfg |
DMA_CHAN_CFG_DST_LINEAR_MODE |
- DMA_CHAN_CFG_SRC_IO_MODE |
- DMA_CHAN_CFG_DST_DRQ(DRQ_SDRAM) |
- DMA_CHAN_CFG_SRC_DRQ(vchan->port);
+ DMA_CHAN_CFG_SRC_IO_MODE;
+ sdev->cfg->set_drq(&v_lli->cfg, vchan->port, DRQ_SDRAM);
dev_dbg(chan2dev(chan),
"%s; chan: %d, dest: %pad, src: %pad, len: %u. flags: 0x%08lx\n",
@@ -780,17 +784,15 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_dma_cyclic(
v_lli->dst = sconfig->dst_addr;
v_lli->cfg = lli_cfg |
DMA_CHAN_CFG_DST_IO_MODE |
- DMA_CHAN_CFG_SRC_LINEAR_MODE |
- DMA_CHAN_CFG_SRC_DRQ(DRQ_SDRAM) |
- DMA_CHAN_CFG_DST_DRQ(vchan->port);
+ DMA_CHAN_CFG_SRC_LINEAR_MODE;
+ sdev->cfg->set_drq(&v_lli->cfg, DRQ_SDRAM, vchan->port);
} else {
v_lli->src = sconfig->src_addr;
v_lli->dst = buf_addr + period_len * i;
v_lli->cfg = lli_cfg |
DMA_CHAN_CFG_DST_LINEAR_MODE |
- DMA_CHAN_CFG_SRC_IO_MODE |
- DMA_CHAN_CFG_DST_DRQ(DRQ_SDRAM) |
- DMA_CHAN_CFG_SRC_DRQ(vchan->port);
+ DMA_CHAN_CFG_SRC_IO_MODE;
+ sdev->cfg->set_drq(&v_lli->cfg, vchan->port, DRQ_SDRAM);
}
prev = sun6i_dma_lli_add(prev, v_lli, p_lli, txd);
@@ -1055,6 +1057,7 @@ static struct sun6i_dma_config sun6i_a31_dma_cfg = {
.nr_max_requests = 30,
.nr_max_vchans = 53,
.set_burst_length = sun6i_set_burst_length_a31,
+ .set_drq = sun6i_set_drq_a31,
.src_burst_lengths = BIT(1) | BIT(8),
.dst_burst_lengths = BIT(1) | BIT(8),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1076,6 +1079,7 @@ static struct sun6i_dma_config sun8i_a23_dma_cfg = {
.nr_max_vchans = 37,
.clock_autogate_enable = sun6i_enable_clock_autogate_a23,
.set_burst_length = sun6i_set_burst_length_a31,
+ .set_drq = sun6i_set_drq_a31,
.src_burst_lengths = BIT(1) | BIT(8),
.dst_burst_lengths = BIT(1) | BIT(8),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1092,6 +1096,7 @@ static struct sun6i_dma_config sun8i_a83t_dma_cfg = {
.nr_max_vchans = 39,
.clock_autogate_enable = sun6i_enable_clock_autogate_a23,
.set_burst_length = sun6i_set_burst_length_a31,
+ .set_drq = sun6i_set_drq_a31,
.src_burst_lengths = BIT(1) | BIT(8),
.dst_burst_lengths = BIT(1) | BIT(8),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1115,6 +1120,7 @@ static struct sun6i_dma_config sun8i_h3_dma_cfg = {
.nr_max_vchans = 34,
.clock_autogate_enable = sun6i_enable_clock_autogate_h3,
.set_burst_length = sun6i_set_burst_length_h3,
+ .set_drq = sun6i_set_drq_a31,
.src_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
.dst_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1134,6 +1140,7 @@ static struct sun6i_dma_config sun8i_h3_dma_cfg = {
static struct sun6i_dma_config sun50i_a64_dma_cfg = {
.clock_autogate_enable = sun6i_enable_clock_autogate_h3,
.set_burst_length = sun6i_set_burst_length_h3,
+ .set_drq = sun6i_set_drq_a31,
.src_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
.dst_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1157,6 +1164,7 @@ static struct sun6i_dma_config sun8i_v3s_dma_cfg = {
.nr_max_vchans = 24,
.clock_autogate_enable = sun6i_enable_clock_autogate_a23,
.set_burst_length = sun6i_set_burst_length_a31,
+ .set_drq = sun6i_set_drq_a31,
.src_burst_lengths = BIT(1) | BIT(8),
.dst_burst_lengths = BIT(1) | BIT(8),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1272,8 +1280,8 @@ static int sun6i_dma_probe(struct platform_device *pdev)
ret = of_property_read_u32(np, "dma-requests", &sdc->max_request);
if (ret && !sdc->max_request) {
dev_info(&pdev->dev, "Missing dma-requests, using %u.\n",
- DMA_CHAN_MAX_DRQ);
- sdc->max_request = DMA_CHAN_MAX_DRQ;
+ DMA_CHAN_MAX_DRQ_A31);
+ sdc->max_request = DMA_CHAN_MAX_DRQ_A31;
}
/*
--
2.20.1
From: Jernej Skrabec <[email protected]>
H6 DMA has mode fields in different position than any other currently
supported DMA controller.
Add a quirk for that.
Signed-off-by: Jernej Skrabec <[email protected]>
Signed-off-by: Clément Péron <[email protected]>
---
drivers/dma/sun6i-dma.c | 46 ++++++++++++++++++++++++-----------------
1 file changed, 27 insertions(+), 19 deletions(-)
diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index f725b93fd21a..f5cb5e89bf7b 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -70,15 +70,13 @@
#define DMA_CHAN_CUR_CFG 0x0c
#define DMA_CHAN_MAX_DRQ_A31 0x1f
#define DMA_CHAN_CFG_SRC_DRQ_A31(x) ((x) & DMA_CHAN_MAX_DRQ_A31)
-#define DMA_CHAN_CFG_SRC_IO_MODE BIT(5)
-#define DMA_CHAN_CFG_SRC_LINEAR_MODE (0 << 5)
+#define DMA_CHAN_CFG_SRC_MODE_A31(x) (((x) & 0x1) << 5)
#define DMA_CHAN_CFG_SRC_BURST_A31(x) (((x) & 0x3) << 7)
#define DMA_CHAN_CFG_SRC_BURST_H3(x) (((x) & 0x3) << 6)
#define DMA_CHAN_CFG_SRC_WIDTH(x) (((x) & 0x3) << 9)
#define DMA_CHAN_CFG_DST_DRQ_A31(x) (DMA_CHAN_CFG_SRC_DRQ_A31(x) << 16)
-#define DMA_CHAN_CFG_DST_IO_MODE (DMA_CHAN_CFG_SRC_IO_MODE << 16)
-#define DMA_CHAN_CFG_DST_LINEAR_MODE (DMA_CHAN_CFG_SRC_LINEAR_MODE << 16)
+#define DMA_CHAN_CFG_DST_MODE_A31(x) (DMA_CHAN_CFG_SRC_MODE_A31(x) << 16)
#define DMA_CHAN_CFG_DST_BURST_A31(x) (DMA_CHAN_CFG_SRC_BURST_A31(x) << 16)
#define DMA_CHAN_CFG_DST_BURST_H3(x) (DMA_CHAN_CFG_SRC_BURST_H3(x) << 16)
#define DMA_CHAN_CFG_DST_WIDTH(x) (DMA_CHAN_CFG_SRC_WIDTH(x) << 16)
@@ -98,6 +96,8 @@
#define LLI_LAST_ITEM 0xfffff800
#define NORMAL_WAIT 8
#define DRQ_SDRAM 1
+#define LINEAR_MODE 0
+#define IO_MODE 1
/* forward declaration */
struct sun6i_dma_dev;
@@ -126,6 +126,7 @@ struct sun6i_dma_config {
void (*clock_autogate_enable)(struct sun6i_dma_dev *);
void (*set_burst_length)(u32 *p_cfg, s8 src_burst, s8 dst_burst);
void (*set_drq)(u32 *p_cfg, s8 src_drq, s8 dst_drq);
+ void (*set_mode)(u32 *p_cfg, s8 src_mode, s8 dst_mode);
u32 src_burst_lengths;
u32 dst_burst_lengths;
u32 src_addr_widths;
@@ -318,6 +319,12 @@ static void sun6i_set_drq_a31(u32 *p_cfg, s8 src_drq, s8 dst_drq)
DMA_CHAN_CFG_DST_DRQ_A31(dst_drq);
}
+static void sun6i_set_mode_a31(u32 *p_cfg, s8 src_mode, s8 dst_mode)
+{
+ *p_cfg |= DMA_CHAN_CFG_SRC_MODE_A31(src_mode) |
+ DMA_CHAN_CFG_DST_MODE_A31(dst_mode);
+}
+
static size_t sun6i_get_chan_size(struct sun6i_pchan *pchan)
{
struct sun6i_desc *txd = pchan->desc;
@@ -641,13 +648,12 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_dma_memcpy(
burst = convert_burst(8);
width = convert_buswidth(DMA_SLAVE_BUSWIDTH_4_BYTES);
- v_lli->cfg = DMA_CHAN_CFG_DST_LINEAR_MODE |
- DMA_CHAN_CFG_SRC_LINEAR_MODE |
- DMA_CHAN_CFG_SRC_WIDTH(width) |
+ v_lli->cfg = DMA_CHAN_CFG_SRC_WIDTH(width) |
DMA_CHAN_CFG_DST_WIDTH(width);
sdev->cfg->set_burst_length(&v_lli->cfg, burst, burst);
sdev->cfg->set_drq(&v_lli->cfg, DRQ_SDRAM, DRQ_SDRAM);
+ sdev->cfg->set_mode(&v_lli->cfg, LINEAR_MODE, LINEAR_MODE);
sun6i_dma_lli_add(NULL, v_lli, p_lli, txd);
@@ -699,10 +705,9 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_slave_sg(
if (dir == DMA_MEM_TO_DEV) {
v_lli->src = sg_dma_address(sg);
v_lli->dst = sconfig->dst_addr;
- v_lli->cfg = lli_cfg |
- DMA_CHAN_CFG_DST_IO_MODE |
- DMA_CHAN_CFG_SRC_LINEAR_MODE;
+ v_lli->cfg = lli_cfg;
sdev->cfg->set_drq(&v_lli->cfg, DRQ_SDRAM, vchan->port);
+ sdev->cfg->set_mode(&v_lli->cfg, LINEAR_MODE, IO_MODE);
dev_dbg(chan2dev(chan),
"%s; chan: %d, dest: %pad, src: %pad, len: %u. flags: 0x%08lx\n",
@@ -713,10 +718,9 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_slave_sg(
} else {
v_lli->src = sconfig->src_addr;
v_lli->dst = sg_dma_address(sg);
- v_lli->cfg = lli_cfg |
- DMA_CHAN_CFG_DST_LINEAR_MODE |
- DMA_CHAN_CFG_SRC_IO_MODE;
+ v_lli->cfg = lli_cfg;
sdev->cfg->set_drq(&v_lli->cfg, vchan->port, DRQ_SDRAM);
+ sdev->cfg->set_mode(&v_lli->cfg, IO_MODE, LINEAR_MODE);
dev_dbg(chan2dev(chan),
"%s; chan: %d, dest: %pad, src: %pad, len: %u. flags: 0x%08lx\n",
@@ -782,17 +786,15 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_dma_cyclic(
if (dir == DMA_MEM_TO_DEV) {
v_lli->src = buf_addr + period_len * i;
v_lli->dst = sconfig->dst_addr;
- v_lli->cfg = lli_cfg |
- DMA_CHAN_CFG_DST_IO_MODE |
- DMA_CHAN_CFG_SRC_LINEAR_MODE;
+ v_lli->cfg = lli_cfg;
sdev->cfg->set_drq(&v_lli->cfg, DRQ_SDRAM, vchan->port);
+ sdev->cfg->set_mode(&v_lli->cfg, LINEAR_MODE, IO_MODE);
} else {
v_lli->src = sconfig->src_addr;
v_lli->dst = buf_addr + period_len * i;
- v_lli->cfg = lli_cfg |
- DMA_CHAN_CFG_DST_LINEAR_MODE |
- DMA_CHAN_CFG_SRC_IO_MODE;
+ v_lli->cfg = lli_cfg;
sdev->cfg->set_drq(&v_lli->cfg, vchan->port, DRQ_SDRAM);
+ sdev->cfg->set_mode(&v_lli->cfg, IO_MODE, LINEAR_MODE);
}
prev = sun6i_dma_lli_add(prev, v_lli, p_lli, txd);
@@ -1058,6 +1060,7 @@ static struct sun6i_dma_config sun6i_a31_dma_cfg = {
.nr_max_vchans = 53,
.set_burst_length = sun6i_set_burst_length_a31,
.set_drq = sun6i_set_drq_a31,
+ .set_mode = sun6i_set_mode_a31,
.src_burst_lengths = BIT(1) | BIT(8),
.dst_burst_lengths = BIT(1) | BIT(8),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1080,6 +1083,7 @@ static struct sun6i_dma_config sun8i_a23_dma_cfg = {
.clock_autogate_enable = sun6i_enable_clock_autogate_a23,
.set_burst_length = sun6i_set_burst_length_a31,
.set_drq = sun6i_set_drq_a31,
+ .set_mode = sun6i_set_mode_a31,
.src_burst_lengths = BIT(1) | BIT(8),
.dst_burst_lengths = BIT(1) | BIT(8),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1097,6 +1101,7 @@ static struct sun6i_dma_config sun8i_a83t_dma_cfg = {
.clock_autogate_enable = sun6i_enable_clock_autogate_a23,
.set_burst_length = sun6i_set_burst_length_a31,
.set_drq = sun6i_set_drq_a31,
+ .set_mode = sun6i_set_mode_a31,
.src_burst_lengths = BIT(1) | BIT(8),
.dst_burst_lengths = BIT(1) | BIT(8),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1121,6 +1126,7 @@ static struct sun6i_dma_config sun8i_h3_dma_cfg = {
.clock_autogate_enable = sun6i_enable_clock_autogate_h3,
.set_burst_length = sun6i_set_burst_length_h3,
.set_drq = sun6i_set_drq_a31,
+ .set_mode = sun6i_set_mode_a31,
.src_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
.dst_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1141,6 +1147,7 @@ static struct sun6i_dma_config sun50i_a64_dma_cfg = {
.clock_autogate_enable = sun6i_enable_clock_autogate_h3,
.set_burst_length = sun6i_set_burst_length_h3,
.set_drq = sun6i_set_drq_a31,
+ .set_mode = sun6i_set_mode_a31,
.src_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
.dst_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1165,6 +1172,7 @@ static struct sun6i_dma_config sun8i_v3s_dma_cfg = {
.clock_autogate_enable = sun6i_enable_clock_autogate_a23,
.set_burst_length = sun6i_set_burst_length_a31,
.set_drq = sun6i_set_drq_a31,
+ .set_mode = sun6i_set_mode_a31,
.src_burst_lengths = BIT(1) | BIT(8),
.dst_burst_lengths = BIT(1) | BIT(8),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
--
2.20.1
On Sat, May 25, 2019 at 06:38:17PM +0200, Cl?ment P?ron wrote:
> From: Jernej Skrabec <[email protected]>
>
> H6 DMA has more than 32 supported DRQs, which means that configuration
> register is slightly rearranged. It also needs additional clock to be
> enabled.
>
> Add support for it.
>
> Signed-off-by: Jernej Skrabec <[email protected]>
> Signed-off-by: Cl?ment P?ron <[email protected]>
> ---
> drivers/dma/sun6i-dma.c | 44 +++++++++++++++++++++++++++++++++++++++--
> 1 file changed, 42 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
> index f5cb5e89bf7b..8d44ddae926a 100644
> --- a/drivers/dma/sun6i-dma.c
> +++ b/drivers/dma/sun6i-dma.c
> @@ -69,14 +69,19 @@
>
> #define DMA_CHAN_CUR_CFG 0x0c
> #define DMA_CHAN_MAX_DRQ_A31 0x1f
> +#define DMA_CHAN_MAX_DRQ_H6 0x3f
> #define DMA_CHAN_CFG_SRC_DRQ_A31(x) ((x) & DMA_CHAN_MAX_DRQ_A31)
> +#define DMA_CHAN_CFG_SRC_DRQ_H6(x) ((x) & DMA_CHAN_MAX_DRQ_H6)
> #define DMA_CHAN_CFG_SRC_MODE_A31(x) (((x) & 0x1) << 5)
> +#define DMA_CHAN_CFG_SRC_MODE_H6(x) (((x) & 0x1) << 8)
> #define DMA_CHAN_CFG_SRC_BURST_A31(x) (((x) & 0x3) << 7)
> #define DMA_CHAN_CFG_SRC_BURST_H3(x) (((x) & 0x3) << 6)
> #define DMA_CHAN_CFG_SRC_WIDTH(x) (((x) & 0x3) << 9)
>
> #define DMA_CHAN_CFG_DST_DRQ_A31(x) (DMA_CHAN_CFG_SRC_DRQ_A31(x) << 16)
> +#define DMA_CHAN_CFG_DST_DRQ_H6(x) (DMA_CHAN_CFG_SRC_DRQ_H6(x) << 16)
> #define DMA_CHAN_CFG_DST_MODE_A31(x) (DMA_CHAN_CFG_SRC_MODE_A31(x) << 16)
> +#define DMA_CHAN_CFG_DST_MODE_H6(x) (DMA_CHAN_CFG_SRC_MODE_H6(x) << 16)
> #define DMA_CHAN_CFG_DST_BURST_A31(x) (DMA_CHAN_CFG_SRC_BURST_A31(x) << 16)
> #define DMA_CHAN_CFG_DST_BURST_H3(x) (DMA_CHAN_CFG_SRC_BURST_H3(x) << 16)
> #define DMA_CHAN_CFG_DST_WIDTH(x) (DMA_CHAN_CFG_SRC_WIDTH(x) << 16)
> @@ -319,12 +324,24 @@ static void sun6i_set_drq_a31(u32 *p_cfg, s8 src_drq, s8 dst_drq)
> DMA_CHAN_CFG_DST_DRQ_A31(dst_drq);
> }
>
> +static void sun6i_set_drq_h6(u32 *p_cfg, s8 src_drq, s8 dst_drq)
> +{
> + *p_cfg |= DMA_CHAN_CFG_SRC_DRQ_H6(src_drq) |
> + DMA_CHAN_CFG_DST_DRQ_H6(dst_drq);
> +}
> +
> static void sun6i_set_mode_a31(u32 *p_cfg, s8 src_mode, s8 dst_mode)
> {
> *p_cfg |= DMA_CHAN_CFG_SRC_MODE_A31(src_mode) |
> DMA_CHAN_CFG_DST_MODE_A31(dst_mode);
> }
>
> +static void sun6i_set_mode_h6(u32 *p_cfg, s8 src_mode, s8 dst_mode)
> +{
> + *p_cfg |= DMA_CHAN_CFG_SRC_MODE_H6(src_mode) |
> + DMA_CHAN_CFG_DST_MODE_H6(dst_mode);
> +}
> +
> static size_t sun6i_get_chan_size(struct sun6i_pchan *pchan)
> {
> struct sun6i_desc *txd = pchan->desc;
> @@ -1160,6 +1177,28 @@ static struct sun6i_dma_config sun50i_a64_dma_cfg = {
> BIT(DMA_SLAVE_BUSWIDTH_8_BYTES),
> };
>
> +/*
> + * The H6 binding uses the number of dma channels from the
> + * device tree node.
> + */
> +static struct sun6i_dma_config sun50i_h6_dma_cfg = {
> + .clock_autogate_enable = sun6i_enable_clock_autogate_h3,
> + .set_burst_length = sun6i_set_burst_length_h3,
> + .set_drq = sun6i_set_drq_h6,
> + .set_mode = sun6i_set_mode_h6,
> + .src_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
> + .dst_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
> + .src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
> + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
> + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
> + BIT(DMA_SLAVE_BUSWIDTH_8_BYTES),
> + .dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
> + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
> + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
> + BIT(DMA_SLAVE_BUSWIDTH_8_BYTES),
> + .has_mbus_clk = true,
> +};
> +
> /*
> * The V3s have only 8 physical channels, a maximum DRQ port id of 23,
> * and a total of 24 usable source and destination endpoints.
> @@ -1190,6 +1229,7 @@ static const struct of_device_id sun6i_dma_match[] = {
> { .compatible = "allwinner,sun8i-h3-dma", .data = &sun8i_h3_dma_cfg },
> { .compatible = "allwinner,sun8i-v3s-dma", .data = &sun8i_v3s_dma_cfg },
> { .compatible = "allwinner,sun50i-a64-dma", .data = &sun50i_a64_dma_cfg },
> + { .compatible = "allwinner,sun50i-h6-dma", .data = &sun50i_h6_dma_cfg },
> { /* sentinel */ }
> };
> MODULE_DEVICE_TABLE(of, sun6i_dma_match);
> @@ -1288,8 +1328,8 @@ static int sun6i_dma_probe(struct platform_device *pdev)
> ret = of_property_read_u32(np, "dma-requests", &sdc->max_request);
> if (ret && !sdc->max_request) {
> dev_info(&pdev->dev, "Missing dma-requests, using %u.\n",
> - DMA_CHAN_MAX_DRQ_A31);
> - sdc->max_request = DMA_CHAN_MAX_DRQ_A31;
> + DMA_CHAN_MAX_DRQ_H6);
> + sdc->max_request = DMA_CHAN_MAX_DRQ_H6;
This is changing the binding though, since we're changing the
default. This should be reflected in the binding, and we should keep
the same default in the device tree binding.
Maxime
--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
Hi Maxime,
On Sun, 26 May 2019 at 20:34, Maxime Ripard <[email protected]> wrote:
>
> On Sat, May 25, 2019 at 06:38:17PM +0200, Clément Péron wrote:
> > From: Jernej Skrabec <[email protected]>
> >
> > H6 DMA has more than 32 supported DRQs, which means that configuration
> > register is slightly rearranged. It also needs additional clock to be
> > enabled.
> >
> > Add support for it.
> >
> > Signed-off-by: Jernej Skrabec <[email protected]>
> > Signed-off-by: Clément Péron <[email protected]>
> > ---
> > drivers/dma/sun6i-dma.c | 44 +++++++++++++++++++++++++++++++++++++++--
> > 1 file changed, 42 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
> > index f5cb5e89bf7b..8d44ddae926a 100644
> > --- a/drivers/dma/sun6i-dma.c
> > +++ b/drivers/dma/sun6i-dma.c
> > @@ -69,14 +69,19 @@
> >
> > #define DMA_CHAN_CUR_CFG 0x0c
> > #define DMA_CHAN_MAX_DRQ_A31 0x1f
> > +#define DMA_CHAN_MAX_DRQ_H6 0x3f
> > #define DMA_CHAN_CFG_SRC_DRQ_A31(x) ((x) & DMA_CHAN_MAX_DRQ_A31)
> > +#define DMA_CHAN_CFG_SRC_DRQ_H6(x) ((x) & DMA_CHAN_MAX_DRQ_H6)
> > #define DMA_CHAN_CFG_SRC_MODE_A31(x) (((x) & 0x1) << 5)
> > +#define DMA_CHAN_CFG_SRC_MODE_H6(x) (((x) & 0x1) << 8)
> > #define DMA_CHAN_CFG_SRC_BURST_A31(x) (((x) & 0x3) << 7)
> > #define DMA_CHAN_CFG_SRC_BURST_H3(x) (((x) & 0x3) << 6)
> > #define DMA_CHAN_CFG_SRC_WIDTH(x) (((x) & 0x3) << 9)
> >
> > #define DMA_CHAN_CFG_DST_DRQ_A31(x) (DMA_CHAN_CFG_SRC_DRQ_A31(x) << 16)
> > +#define DMA_CHAN_CFG_DST_DRQ_H6(x) (DMA_CHAN_CFG_SRC_DRQ_H6(x) << 16)
> > #define DMA_CHAN_CFG_DST_MODE_A31(x) (DMA_CHAN_CFG_SRC_MODE_A31(x) << 16)
> > +#define DMA_CHAN_CFG_DST_MODE_H6(x) (DMA_CHAN_CFG_SRC_MODE_H6(x) << 16)
> > #define DMA_CHAN_CFG_DST_BURST_A31(x) (DMA_CHAN_CFG_SRC_BURST_A31(x) << 16)
> > #define DMA_CHAN_CFG_DST_BURST_H3(x) (DMA_CHAN_CFG_SRC_BURST_H3(x) << 16)
> > #define DMA_CHAN_CFG_DST_WIDTH(x) (DMA_CHAN_CFG_SRC_WIDTH(x) << 16)
> > @@ -319,12 +324,24 @@ static void sun6i_set_drq_a31(u32 *p_cfg, s8 src_drq, s8 dst_drq)
> > DMA_CHAN_CFG_DST_DRQ_A31(dst_drq);
> > }
> >
> > +static void sun6i_set_drq_h6(u32 *p_cfg, s8 src_drq, s8 dst_drq)
> > +{
> > + *p_cfg |= DMA_CHAN_CFG_SRC_DRQ_H6(src_drq) |
> > + DMA_CHAN_CFG_DST_DRQ_H6(dst_drq);
> > +}
> > +
> > static void sun6i_set_mode_a31(u32 *p_cfg, s8 src_mode, s8 dst_mode)
> > {
> > *p_cfg |= DMA_CHAN_CFG_SRC_MODE_A31(src_mode) |
> > DMA_CHAN_CFG_DST_MODE_A31(dst_mode);
> > }
> >
> > +static void sun6i_set_mode_h6(u32 *p_cfg, s8 src_mode, s8 dst_mode)
> > +{
> > + *p_cfg |= DMA_CHAN_CFG_SRC_MODE_H6(src_mode) |
> > + DMA_CHAN_CFG_DST_MODE_H6(dst_mode);
> > +}
> > +
> > static size_t sun6i_get_chan_size(struct sun6i_pchan *pchan)
> > {
> > struct sun6i_desc *txd = pchan->desc;
> > @@ -1160,6 +1177,28 @@ static struct sun6i_dma_config sun50i_a64_dma_cfg = {
> > BIT(DMA_SLAVE_BUSWIDTH_8_BYTES),
> > };
> >
> > +/*
> > + * The H6 binding uses the number of dma channels from the
> > + * device tree node.
> > + */
> > +static struct sun6i_dma_config sun50i_h6_dma_cfg = {
> > + .clock_autogate_enable = sun6i_enable_clock_autogate_h3,
> > + .set_burst_length = sun6i_set_burst_length_h3,
> > + .set_drq = sun6i_set_drq_h6,
> > + .set_mode = sun6i_set_mode_h6,
> > + .src_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
> > + .dst_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
> > + .src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
> > + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
> > + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
> > + BIT(DMA_SLAVE_BUSWIDTH_8_BYTES),
> > + .dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
> > + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
> > + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
> > + BIT(DMA_SLAVE_BUSWIDTH_8_BYTES),
> > + .has_mbus_clk = true,
> > +};
> > +
> > /*
> > * The V3s have only 8 physical channels, a maximum DRQ port id of 23,
> > * and a total of 24 usable source and destination endpoints.
> > @@ -1190,6 +1229,7 @@ static const struct of_device_id sun6i_dma_match[] = {
> > { .compatible = "allwinner,sun8i-h3-dma", .data = &sun8i_h3_dma_cfg },
> > { .compatible = "allwinner,sun8i-v3s-dma", .data = &sun8i_v3s_dma_cfg },
> > { .compatible = "allwinner,sun50i-a64-dma", .data = &sun50i_a64_dma_cfg },
> > + { .compatible = "allwinner,sun50i-h6-dma", .data = &sun50i_h6_dma_cfg },
> > { /* sentinel */ }
> > };
> > MODULE_DEVICE_TABLE(of, sun6i_dma_match);
> > @@ -1288,8 +1328,8 @@ static int sun6i_dma_probe(struct platform_device *pdev)
> > ret = of_property_read_u32(np, "dma-requests", &sdc->max_request);
> > if (ret && !sdc->max_request) {
> > dev_info(&pdev->dev, "Missing dma-requests, using %u.\n",
> > - DMA_CHAN_MAX_DRQ_A31);
> > - sdc->max_request = DMA_CHAN_MAX_DRQ_A31;
> > + DMA_CHAN_MAX_DRQ_H6);
> > + sdc->max_request = DMA_CHAN_MAX_DRQ_H6;
>
> This is changing the binding though, since we're changing the
> default. This should be reflected in the binding, and we should keep
> the same default in the device tree binding.
Agree, H6 device-tree will have the "dma-request" property.
As this modification is not mandatory, we can drop it to avoid
bindings modification.
What do you think?
Thanks for your review,
Clément
>
> Maxime
>
> --
> Maxime Ripard, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com
On Sun, May 26, 2019 at 09:12:36PM +0200, Cl?ment P?ron wrote:
> Hi Maxime,
>
> On Sun, 26 May 2019 at 20:34, Maxime Ripard <[email protected]> wrote:
> >
> > On Sat, May 25, 2019 at 06:38:17PM +0200, Cl?ment P?ron wrote:
> > > From: Jernej Skrabec <[email protected]>
> > >
> > > H6 DMA has more than 32 supported DRQs, which means that configuration
> > > register is slightly rearranged. It also needs additional clock to be
> > > enabled.
> > >
> > > Add support for it.
> > >
> > > Signed-off-by: Jernej Skrabec <[email protected]>
> > > Signed-off-by: Cl?ment P?ron <[email protected]>
> > > ---
> > > drivers/dma/sun6i-dma.c | 44 +++++++++++++++++++++++++++++++++++++++--
> > > 1 file changed, 42 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
> > > index f5cb5e89bf7b..8d44ddae926a 100644
> > > --- a/drivers/dma/sun6i-dma.c
> > > +++ b/drivers/dma/sun6i-dma.c
> > > @@ -69,14 +69,19 @@
> > >
> > > #define DMA_CHAN_CUR_CFG 0x0c
> > > #define DMA_CHAN_MAX_DRQ_A31 0x1f
> > > +#define DMA_CHAN_MAX_DRQ_H6 0x3f
> > > #define DMA_CHAN_CFG_SRC_DRQ_A31(x) ((x) & DMA_CHAN_MAX_DRQ_A31)
> > > +#define DMA_CHAN_CFG_SRC_DRQ_H6(x) ((x) & DMA_CHAN_MAX_DRQ_H6)
> > > #define DMA_CHAN_CFG_SRC_MODE_A31(x) (((x) & 0x1) << 5)
> > > +#define DMA_CHAN_CFG_SRC_MODE_H6(x) (((x) & 0x1) << 8)
> > > #define DMA_CHAN_CFG_SRC_BURST_A31(x) (((x) & 0x3) << 7)
> > > #define DMA_CHAN_CFG_SRC_BURST_H3(x) (((x) & 0x3) << 6)
> > > #define DMA_CHAN_CFG_SRC_WIDTH(x) (((x) & 0x3) << 9)
> > >
> > > #define DMA_CHAN_CFG_DST_DRQ_A31(x) (DMA_CHAN_CFG_SRC_DRQ_A31(x) << 16)
> > > +#define DMA_CHAN_CFG_DST_DRQ_H6(x) (DMA_CHAN_CFG_SRC_DRQ_H6(x) << 16)
> > > #define DMA_CHAN_CFG_DST_MODE_A31(x) (DMA_CHAN_CFG_SRC_MODE_A31(x) << 16)
> > > +#define DMA_CHAN_CFG_DST_MODE_H6(x) (DMA_CHAN_CFG_SRC_MODE_H6(x) << 16)
> > > #define DMA_CHAN_CFG_DST_BURST_A31(x) (DMA_CHAN_CFG_SRC_BURST_A31(x) << 16)
> > > #define DMA_CHAN_CFG_DST_BURST_H3(x) (DMA_CHAN_CFG_SRC_BURST_H3(x) << 16)
> > > #define DMA_CHAN_CFG_DST_WIDTH(x) (DMA_CHAN_CFG_SRC_WIDTH(x) << 16)
> > > @@ -319,12 +324,24 @@ static void sun6i_set_drq_a31(u32 *p_cfg, s8 src_drq, s8 dst_drq)
> > > DMA_CHAN_CFG_DST_DRQ_A31(dst_drq);
> > > }
> > >
> > > +static void sun6i_set_drq_h6(u32 *p_cfg, s8 src_drq, s8 dst_drq)
> > > +{
> > > + *p_cfg |= DMA_CHAN_CFG_SRC_DRQ_H6(src_drq) |
> > > + DMA_CHAN_CFG_DST_DRQ_H6(dst_drq);
> > > +}
> > > +
> > > static void sun6i_set_mode_a31(u32 *p_cfg, s8 src_mode, s8 dst_mode)
> > > {
> > > *p_cfg |= DMA_CHAN_CFG_SRC_MODE_A31(src_mode) |
> > > DMA_CHAN_CFG_DST_MODE_A31(dst_mode);
> > > }
> > >
> > > +static void sun6i_set_mode_h6(u32 *p_cfg, s8 src_mode, s8 dst_mode)
> > > +{
> > > + *p_cfg |= DMA_CHAN_CFG_SRC_MODE_H6(src_mode) |
> > > + DMA_CHAN_CFG_DST_MODE_H6(dst_mode);
> > > +}
> > > +
> > > static size_t sun6i_get_chan_size(struct sun6i_pchan *pchan)
> > > {
> > > struct sun6i_desc *txd = pchan->desc;
> > > @@ -1160,6 +1177,28 @@ static struct sun6i_dma_config sun50i_a64_dma_cfg = {
> > > BIT(DMA_SLAVE_BUSWIDTH_8_BYTES),
> > > };
> > >
> > > +/*
> > > + * The H6 binding uses the number of dma channels from the
> > > + * device tree node.
> > > + */
> > > +static struct sun6i_dma_config sun50i_h6_dma_cfg = {
> > > + .clock_autogate_enable = sun6i_enable_clock_autogate_h3,
> > > + .set_burst_length = sun6i_set_burst_length_h3,
> > > + .set_drq = sun6i_set_drq_h6,
> > > + .set_mode = sun6i_set_mode_h6,
> > > + .src_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
> > > + .dst_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
> > > + .src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
> > > + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
> > > + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
> > > + BIT(DMA_SLAVE_BUSWIDTH_8_BYTES),
> > > + .dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
> > > + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
> > > + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
> > > + BIT(DMA_SLAVE_BUSWIDTH_8_BYTES),
> > > + .has_mbus_clk = true,
> > > +};
> > > +
> > > /*
> > > * The V3s have only 8 physical channels, a maximum DRQ port id of 23,
> > > * and a total of 24 usable source and destination endpoints.
> > > @@ -1190,6 +1229,7 @@ static const struct of_device_id sun6i_dma_match[] = {
> > > { .compatible = "allwinner,sun8i-h3-dma", .data = &sun8i_h3_dma_cfg },
> > > { .compatible = "allwinner,sun8i-v3s-dma", .data = &sun8i_v3s_dma_cfg },
> > > { .compatible = "allwinner,sun50i-a64-dma", .data = &sun50i_a64_dma_cfg },
> > > + { .compatible = "allwinner,sun50i-h6-dma", .data = &sun50i_h6_dma_cfg },
> > > { /* sentinel */ }
> > > };
> > > MODULE_DEVICE_TABLE(of, sun6i_dma_match);
> > > @@ -1288,8 +1328,8 @@ static int sun6i_dma_probe(struct platform_device *pdev)
> > > ret = of_property_read_u32(np, "dma-requests", &sdc->max_request);
> > > if (ret && !sdc->max_request) {
> > > dev_info(&pdev->dev, "Missing dma-requests, using %u.\n",
> > > - DMA_CHAN_MAX_DRQ_A31);
> > > - sdc->max_request = DMA_CHAN_MAX_DRQ_A31;
> > > + DMA_CHAN_MAX_DRQ_H6);
> > > + sdc->max_request = DMA_CHAN_MAX_DRQ_H6;
> >
> > This is changing the binding though, since we're changing the
> > default. This should be reflected in the binding, and we should keep
> > the same default in the device tree binding.
>
> Agree, H6 device-tree will have the "dma-request" property.
> As this modification is not mandatory, we can drop it to avoid
> bindings modification.
>
> What do you think?
That works for me
Maxime
--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com