[v2,5/5] dmaengine: ti: k3-udma: Add support for BCDMA CSI RX

Commit Message

Vignesh Raghavendra Dec. 12, 2022, 10:54 a.m. UTC

BCDMA CSI RX present on AM62Ax SoC is a dedicated DMA for servicing
Camera Serial Interface (CSI) IP. Add support for the same.

Signed-off-by: Vignesh Raghavendra <[e-mail]>
---
 drivers/dma/ti/k3-udma.c | 37 ++++++++++++++++++++++++++++++++-----
 1 file changed, 32 insertions(+), 5 deletions(-)

Patch

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index c1005d17b42e..1d3d1b387b96 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -135,6 +135,7 @@  struct udma_match_data {
 	u32 flags;
 	u32 statictr_z_mask;
 	u8 burst_size[3];
+	struct udma_soc_data *soc_data;
 };
 
 struct udma_soc_data {
@@ -4295,6 +4296,25 @@  static struct udma_match_data j721e_mcu_data = {
 	},
 };
 
+static struct udma_soc_data am62a_dmss_csi_soc_data = {
+	.oes = {
+		.bcdma_rchan_data = 0xe00,
+		.bcdma_rchan_ring = 0x1000,
+	},
+};
+
+static struct udma_match_data am62a_bcdma_csirx_data = {
+	.type = DMA_TYPE_BCDMA,
+	.psil_base = 0x3100,
+	.enable_memcpy_support = false,
+	.burst_size = {
+		TI_SCI_RM_UDMAP_CHAN_BURST_SIZE_64_BYTES, /* Normal Channels */
+		0, /* No H Channels */
+		0, /* No UH Channels */
+	},
+	.soc_data = &am62a_dmss_csi_soc_data,
+};
+
 static struct udma_match_data am64_bcdma_data = {
 	.type = DMA_TYPE_BCDMA,
 	.psil_base = 0x2000, /* for tchan and rchan, not applicable to bchan */
@@ -4344,6 +4364,10 @@  static const struct of_device_id udma_of_match[] = {
 		.compatible = "ti,am64-dmss-pktdma",
 		.data = &am64_pktdma_data,
 	},
+	{
+		.compatible = "ti,am62a-dmss-bcdma-csirx",
+		.data = &am62a_bcdma_csirx_data,
+	},
 	{ /* Sentinel */ },
 };
 
@@ -5274,12 +5298,15 @@  static int udma_probe(struct platform_device *pdev)
 	}
 	ud->match_data = match->data;
 
-	soc = soc_device_match(k3_soc_devices);
-	if (!soc) {
-		dev_err(dev, "No compatible SoC found\n");
-		return -ENODEV;
+	ud->soc_data = ud->match_data->soc_data;
+	if (!ud->soc_data) {
+		soc = soc_device_match(k3_soc_devices);
+		if (!soc) {
+			dev_err(dev, "No compatible SoC found\n");
+			return -ENODEV;
+		}
+		ud->soc_data = soc->data;
 	}
-	ud->soc_data = soc->data;
 
 	ret = udma_get_mmrs(pdev, ud);
 	if (ret)