linux-kernel - [PATCH 2/3] MIPS: Loongson1B: Add Loongson1 dmaengine device

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Date:   Fri, 21 May 2021 08:04:04 +0800
From:   Keguang Zhang <keguang.zhang@...il.com>
To:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Kelvin Cheung <keguang.zhang@...il.com>
Subject: [PATCH 2/3] MIPS: Loongson1B: Add Loongson1 dmaengine device

From: Kelvin Cheung <keguang.zhang@...il.com>

This patch adds DMA Engine device its platform data for Loongson1B.

Signed-off-by: Kelvin Cheung <keguang.zhang@...il.com>
---
 .../include/asm/mach-loongson32/platform.h    |  2 ++
 arch/mips/loongson32/common/platform.c        | 36 +++++++++++++++++++
 arch/mips/loongson32/ls1b/board.c             | 15 +++++++-
 3 files changed, 52 insertions(+), 1 deletion(-)

diff --git a/arch/mips/include/asm/mach-loongson32/platform.h b/arch/mips/include/asm/mach-loongson32/platform.h
index eb83e2741887..d4d2a9baacdb 100644
--- a/arch/mips/include/asm/mach-loongson32/platform.h
+++ b/arch/mips/include/asm/mach-loongson32/platform.h
@@ -13,6 +13,7 @@
 
 extern struct platform_device ls1x_uart_pdev;
 extern struct platform_device ls1x_cpufreq_pdev;
+extern struct platform_device ls1x_dma_pdev;
 extern struct platform_device ls1x_eth0_pdev;
 extern struct platform_device ls1x_eth1_pdev;
 extern struct platform_device ls1x_ehci_pdev;
@@ -22,6 +23,7 @@ extern struct platform_device ls1x_rtc_pdev;
 extern struct platform_device ls1x_wdt_pdev;
 
 void __init ls1x_clk_init(void);
+void __init ls1x_dma_set_platdata(struct plat_ls1x_dma *pdata);
 void __init ls1x_rtc_set_extclk(struct platform_device *pdev);
 void __init ls1x_serial_set_uartclk(struct platform_device *pdev);
 
diff --git a/arch/mips/loongson32/common/platform.c b/arch/mips/loongson32/common/platform.c
index 794c96c2a4cd..2092a7ff32e0 100644
--- a/arch/mips/loongson32/common/platform.c
+++ b/arch/mips/loongson32/common/platform.c
@@ -77,6 +77,42 @@ struct platform_device ls1x_cpufreq_pdev = {
 	},
 };
 
+/* DMA */
+static struct resource ls1x_dma_resources[] = {
+	[0] = {
+		.start = LS1X_DMAC_BASE,
+		.end = LS1X_DMAC_BASE + SZ_4 - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = LS1X_DMA0_IRQ,
+		.end = LS1X_DMA0_IRQ,
+		.flags = IORESOURCE_IRQ,
+	},
+	[2] = {
+		.start = LS1X_DMA1_IRQ,
+		.end = LS1X_DMA1_IRQ,
+		.flags = IORESOURCE_IRQ,
+	},
+	[3] = {
+		.start = LS1X_DMA2_IRQ,
+		.end = LS1X_DMA2_IRQ,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+struct platform_device ls1x_dma_pdev = {
+	.name		= "ls1x-dma",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(ls1x_dma_resources),
+	.resource	= ls1x_dma_resources,
+};
+
+void __init ls1x_dma_set_platdata(struct plat_ls1x_dma *pdata)
+{
+	ls1x_dma_pdev.dev.platform_data = pdata;
+}
+
 /* Synopsys Ethernet GMAC */
 static struct stmmac_mdio_bus_data ls1x_mdio_bus_data = {
 	.phy_mask	= 0,
diff --git a/arch/mips/loongson32/ls1b/board.c b/arch/mips/loongson32/ls1b/board.c
index 727e06718dab..2be4d8544444 100644
--- a/arch/mips/loongson32/ls1b/board.c
+++ b/arch/mips/loongson32/ls1b/board.c
@@ -12,6 +12,17 @@
 #include <nand.h>
 #include <platform.h>
 
+static const struct dma_slave_map ls1x_dma_slave_map[] = {
+	{ "ls1x-nand", "dmachan0", (void *)LS1X_DMA_CHANNEL0 },
+	{ "ls1x-ac97", "dmachan1", (void *)LS1X_DMA_CHANNEL1 },
+	{ "ls1x-ac97", "dmachan2", (void *)LS1X_DMA_CHANNEL2 },
+};
+
+struct plat_ls1x_dma ls1x_dma_pdata = {
+	.slave_map = ls1x_dma_slave_map,
+	.slavecnt = ARRAY_SIZE(ls1x_dma_slave_map),
+};
+
 static const struct gpio_led ls1x_gpio_leds[] __initconst = {
 	{
 		.name			= "LED9",
@@ -36,6 +47,7 @@ static const struct gpio_led_platform_data ls1x_led_pdata __initconst = {
 static struct platform_device *ls1b_platform_devices[] __initdata = {
 	&ls1x_uart_pdev,
 	&ls1x_cpufreq_pdev,
+	&ls1x_dma_pdev,
 	&ls1x_eth0_pdev,
 	&ls1x_eth1_pdev,
 	&ls1x_ehci_pdev,
@@ -48,11 +60,12 @@ static struct platform_device *ls1b_platform_devices[] __initdata = {
 static int __init ls1b_platform_init(void)
 {
 	ls1x_serial_set_uartclk(&ls1x_uart_pdev);
+	ls1x_dma_set_platdata(&ls1x_dma_pdata);
 
 	gpio_led_register_device(-1, &ls1x_led_pdata);
 
 	return platform_add_devices(ls1b_platform_devices,
-				   ARRAY_SIZE(ls1b_platform_devices));
+				    ARRAY_SIZE(ls1b_platform_devices));
 }
 
 arch_initcall(ls1b_platform_init);
-- 
2.30.2