sh: dmaengine support for SH7786 DMAC0.

Hook up DMAC0 on SH7786.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 81 insertions, 1 deletions

diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7786.c b/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
index f5599907ac3d..61e549190873 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
@@ -1,7 +1,7 @@
 /*
  * 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,
 };