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From: "Clément Péron" <peron.clem@gmail.com>
To: Vinod Koul <vkoul@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Maxime Ripard <maxime.ripard@bootlin.com>,
	Chen-Yu Tsai <wens@csie.org>,
	Dan Williams <dan.j.williams@intel.com>
Cc: dmaengine@vger.kernel.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	"Jernej Skrabec" <jernej.skrabec@siol.net>,
	"Clément Péron" <peron.clem@gmail.com>
Subject: [PATCH v3 5/7] dmaengine: sun6i: Add support for H6 DMA
Date: Mon, 27 May 2019 22:14:57 +0200
Message-ID: <20190527201459.20130-6-peron.clem@gmail.com> (raw)
In-Reply-To: <20190527201459.20130-1-peron.clem@gmail.com>

From: Jernej Skrabec <jernej.skrabec@siol.net>

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 <jernej.skrabec@siol.net>
Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
 drivers/dma/sun6i-dma.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index f5cb5e89bf7b..ddef87ebdfdb 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);
-- 
2.20.1


  parent reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-27 20:14 [PATCH v3 0/7] Allwinner H6 DMA support Clément Péron
2019-05-27 20:14 ` [PATCH v3 1/7] dt-bindings: arm64: allwinner: h6: Add binding for DMA controller Clément Péron
2019-06-04 12:27   ` Vinod Koul
2019-05-27 20:14 ` [PATCH v3 2/7] dmaengine: sun6i: Add a quirk for additional mbus clock Clément Péron
2019-06-04 12:27   ` Vinod Koul
2019-05-27 20:14 ` [PATCH v3 3/7] dmaengine: sun6i: Add a quirk for setting DRQ fields Clément Péron
2019-06-04 12:28   ` Vinod Koul
2019-05-27 20:14 ` [PATCH v3 4/7] dmaengine: sun6i: Add a quirk for setting mode fields Clément Péron
2019-06-04 12:28   ` Vinod Koul
2019-05-27 20:14 ` Clément Péron [this message]
2019-06-04 12:28   ` [PATCH v3 5/7] dmaengine: sun6i: Add support for H6 DMA Vinod Koul
2019-05-27 20:14 ` [PATCH v3 6/7] arm64: dts: allwinner: h6: Add DMA node Clément Péron
2019-06-11  8:27   ` Maxime Ripard
2019-05-27 20:14 ` [PATCH v3 7/7] arm64: defconfig: enable Allwinner DMA drivers Clément Péron
2019-06-11  8:28   ` Maxime Ripard
2019-05-28 11:10 ` [PATCH v3 0/7] Allwinner H6 DMA support Maxime Ripard
2019-06-09 20:42   ` Clément Péron

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