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sh: dmaengine support for SH7786 DMAC0.

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Hook up DMAC0 on SH7786.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2010-04-13 10:15:56 +09:00
parent 99dc5c0ca9
commit 050d4cc702
2 changed files with 83 additions and 2 deletions
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3
arch/sh/include/cpu-sh4/cpu/dma-register.h
View File

@ -23,7 +23,8 @@
#define CHCR_TS_HIGH_MASK 0 #define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0 #define CHCR_TS_HIGH_SHIFT 0
#elif defined(CONFIG_CPU_SUBTYPE_SH7722) || \ #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_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3 #define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0x00300000 #define CHCR_TS_HIGH_MASK 0x00300000

82
arch/sh/kernel/cpu/sh4a/setup-sh7786.c
View File

@ -1,7 +1,7 @@
/* /*
* SH7786 Setup * SH7786 Setup
* *
* Copyright (C) 2009 Renesas Solutions Corp. * Copyright (C) 2009 - 2010 Renesas Solutions Corp.
* Kuninori Morimoto <morimoto.kuninori@renesas.com> * Kuninori Morimoto <morimoto.kuninori@renesas.com>
* Paul Mundt <paul.mundt@renesas.com> * Paul Mundt <paul.mundt@renesas.com>
* *
@ -21,7 +21,9 @@
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/dma-mapping.h> #include <linux/dma-mapping.h>
#include <linux/sh_timer.h> #include <linux/sh_timer.h>
#include <cpu/dma-register.h>
#include <asm/mmzone.h> #include <asm/mmzone.h>
#include <asm/dmaengine.h>
static struct plat_sci_port scif0_platform_data = { static struct plat_sci_port scif0_platform_data = {
.mapbase = 0xffea0000, .mapbase = 0xffea0000,
@ -442,6 +444,83 @@ static struct platform_device tmu11_device = {
.num_resources = ARRAY_SIZE(tmu11_resources), .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[] = { static struct resource usb_ohci_resources[] = {
[0] = { [0] = {
.start = 0xffe70400, .start = 0xffe70400,
@ -489,6 +568,7 @@ static struct platform_device *sh7786_early_devices[] __initdata = {
}; };
static struct platform_device *sh7786_devices[] __initdata = { static struct platform_device *sh7786_devices[] __initdata = {
&dma0_device,
&usb_ohci_device, &usb_ohci_device,
}; };