sh: dmaengine support for SH7786 DMAC0. (050d4cc7) · Commits · github.com / kvm-riscv / linux

arch/sh/include/cpu-sh4/cpu/dma-register.h

+2 −1

Original line number	Diff line number	Diff line
		@@ -23,7 +23,8 @@
		#define CHCR_TS_HIGH_MASK 0
		#define CHCR_TS_HIGH_SHIFT 0
		#elif defined(CONFIG_CPU_SUBTYPE_SH7722) \|\| \
		defined(CONFIG_CPU_SUBTYPE_SH7724)
		defined(CONFIG_CPU_SUBTYPE_SH7724) \|\| \
		defined(CONFIG_CPU_SUBTYPE_SH7786)
		#define CHCR_TS_LOW_MASK 0x00000018
		#define CHCR_TS_LOW_SHIFT 3
		#define CHCR_TS_HIGH_MASK 0x00300000

arch/sh/kernel/cpu/sh4a/setup-sh7786.c

+81 −1

Original line number	Diff line number	Diff line
		/*
		* SH7786 Setup
		*
		* Copyright (C) 2009 Renesas Solutions Corp.
		* Copyright (C) 2009 - 2010 Renesas Solutions Corp.
		* Kuninori Morimoto <morimoto.kuninori@renesas.com>
		* Paul Mundt <paul.mundt@renesas.com>
		*
		@@ -21,7 +21,9 @@
		#include <linux/mm.h>
		#include <linux/dma-mapping.h>
		#include <linux/sh_timer.h>
		#include <cpu/dma-register.h>
		#include <asm/mmzone.h>
		#include <asm/dmaengine.h>

		static struct plat_sci_port scif0_platform_data = {
		.mapbase = 0xffea0000,
		@@ -442,6 +444,83 @@ static struct platform_device tmu11_device = {
		.num_resources = ARRAY_SIZE(tmu11_resources),
		};

		static struct sh_dmae_channel dmac0_channels[] = {
		{
		.offset = 0,
		.dmars = 0,
		.dmars_bit = 0,
		}, {
		.offset = 0x10,
		.dmars = 0,
		.dmars_bit = 8,
		}, {
		.offset = 0x20,
		.dmars = 4,
		.dmars_bit = 0,
		}, {
		.offset = 0x30,
		.dmars = 4,
		.dmars_bit = 8,
		}, {
		.offset = 0x50,
		.dmars = 8,
		.dmars_bit = 0,
		}, {
		.offset = 0x60,
		.dmars = 8,
		.dmars_bit = 8,
		}
		};

		static unsigned int ts_shift[] = TS_SHIFT;

		static struct sh_dmae_pdata dma0_platform_data = {
		.channel = dmac0_channels,
		.channel_num = ARRAY_SIZE(dmac0_channels),
		.ts_low_shift = CHCR_TS_LOW_SHIFT,
		.ts_low_mask = CHCR_TS_LOW_MASK,
		.ts_high_shift = CHCR_TS_HIGH_SHIFT,
		.ts_high_mask = CHCR_TS_HIGH_MASK,
		.ts_shift = ts_shift,
		.ts_shift_num = ARRAY_SIZE(ts_shift),
		.dmaor_init = DMAOR_INIT,
		};

		/* Resource order important! */
		static struct resource dmac0_resources[] = {
		{
		/* Channel registers and DMAOR */
		.start = 0xfe008020,
		.end = 0xfe00808f,
		.flags = IORESOURCE_MEM,
		}, {
		/* DMARSx */
		.start = 0xfe009000,
		.end = 0xfe00900b,
		.flags = IORESOURCE_MEM,
		}, {
		/* DMA error IRQ */
		.start = evt2irq(0x5c0),
		.end = evt2irq(0x5c0),
		.flags = IORESOURCE_IRQ,
		}, {
		/* IRQ for channels 0-5 */
		.start = evt2irq(0x500),
		.end = evt2irq(0x5a0),
		.flags = IORESOURCE_IRQ,
		},
		};

		static struct platform_device dma0_device = {
		.name = "sh-dma-engine",
		.id = 0,
		.resource = dmac0_resources,
		.num_resources = ARRAY_SIZE(dmac0_resources),
		.dev = {
		.platform_data = &dma0_platform_data,
		},
		};

		static struct resource usb_ohci_resources[] = {
		[0] = {
		.start = 0xffe70400,
		@@ -489,6 +568,7 @@ static struct platform_device *sh7786_early_devices[] __initdata = {
		};

		static struct platform_device *sh7786_devices[] __initdata = {
		&dma0_device,
		&usb_ohci_device,
		};