linux-kernel - [PATCH 05/19] dmaengine: sun6i: Add support for A100 DMA

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Message-Id: <20201110040553.1381-6-frank@allwinnertech.com>
Date:   Tue, 10 Nov 2020 12:05:39 +0800
From:   Frank Lee <frank@...winnertech.com>
To:     vkoul@...nel.org, robh+dt@...nel.org, mripard@...nel.org,
        wens@...e.org, ulf.hansson@...aro.org, kishon@...com,
        wim@...ux-watchdog.org, linux@...ck-us.net,
        dan.j.williams@...el.com, linus.walleij@...aro.org,
        wsa+renesas@...g-engineering.com, dianders@...omium.org,
        marex@...x.de, colin.king@...onical.com, rdunlap@...radead.org,
        krzk@...nel.org, gregkh@...uxfoundation.org, megous@...ous.com,
        rikard.falkeborn@...il.com, dmaengine@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-watchdog@...r.kernel.org, linux-gpio@...r.kernel.org,
        tiny.windzz@...il.com
Cc:     Yangtao Li <frank@...winnertech.com>
Subject: [PATCH 05/19] dmaengine: sun6i: Add support for A100 DMA

From: Yangtao Li <frank@...winnertech.com>

The dma of a100 is similar to h6, with some minor changes to
support greater addressing capabilities.

Add support for it.

Signed-off-by: Yangtao Li <frank@...winnertech.com>
---
 drivers/dma/sun6i-dma.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index f5f9c86c50bc..5cadd4d2b824 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -1173,6 +1173,30 @@ static struct sun6i_dma_config sun50i_a64_dma_cfg = {
 			     BIT(DMA_SLAVE_BUSWIDTH_8_BYTES),
 };
 
+/*
+ * TODO: Add support for more than 4g physical addressing.
+ *
+ * The A100 binding uses the number of dma channels from the
+ * device tree node.
+ */
+static struct sun6i_dma_config sun50i_a100_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 H6 binding uses the number of dma channels from the
  * device tree node.
@@ -1225,6 +1249,7 @@ 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-a100-dma", .data = &sun50i_a100_dma_cfg },
 	{ .compatible = "allwinner,sun50i-h6-dma", .data = &sun50i_h6_dma_cfg },
 	{ /* sentinel */ }
 };
-- 
2.28.0