5 files changed, 414 insertions, 1 deletions

diff --git a/arch/arm/mach-shmobile/clock-r8a7740.c b/arch/arm/mach-shmobile/clock-r8a7740.c
index 7b9e4ab34fa2..daf3eace5dcf 100644
--- a/arch/arm/mach-shmobile/clock-r8a7740.c
+++ b/arch/arm/mach-shmobile/clock-r8a7740.c
@@ -463,6 +463,7 @@ enum {
 
         MSTP230,
         MSTP222,
+        MSTP218, MSTP217, MSTP216, MSTP214,
         MSTP207, MSTP206, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200,
 
         MSTP329, MSTP328, MSTP323, MSTP320,
@@ -485,6 +486,10 @@ static struct clk mstp_clks[MSTP_NR] = {
 
         [MSTP230] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB], SMSTPCR2, 30, 0), /* SCIFA6 */
         [MSTP222] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB], SMSTPCR2, 22, 0), /* SCIFA7 */
+        [MSTP218] = SH_CLK_MSTP32(&div4_clks[DIV4_HP],  SMSTPCR2, 18, 0), /* DMAC1 */
+        [MSTP217] = SH_CLK_MSTP32(&div4_clks[DIV4_HP],  SMSTPCR2, 17, 0), /* DMAC2 */
+        [MSTP216] = SH_CLK_MSTP32(&div4_clks[DIV4_HP],  SMSTPCR2, 16, 0), /* DMAC3 */
+        [MSTP214] = SH_CLK_MSTP32(&div4_clks[DIV4_HP],  SMSTPCR2, 14, 0), /* USBDMAC */
         [MSTP207] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB], SMSTPCR2,  7, 0), /* SCIFA5 */
         [MSTP206] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB], SMSTPCR2,  6, 0), /* SCIFB */
         [MSTP204] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB], SMSTPCR2,  4, 0), /* SCIFA0 */
@@ -563,7 +568,10 @@ static struct clk_lookup lookups[] = {
         CLKDEV_DEV_ID("sh-sci.0",               &mstp_clks[MSTP204]),
         CLKDEV_DEV_ID("sh-sci.8",               &mstp_clks[MSTP206]),
         CLKDEV_DEV_ID("sh-sci.5",               &mstp_clks[MSTP207]),
-
+        CLKDEV_DEV_ID("sh-dma-engine.3",        &mstp_clks[MSTP214]),
+        CLKDEV_DEV_ID("sh-dma-engine.2",        &mstp_clks[MSTP216]),
+        CLKDEV_DEV_ID("sh-dma-engine.1",        &mstp_clks[MSTP217]),
+        CLKDEV_DEV_ID("sh-dma-engine.0",        &mstp_clks[MSTP218]),
         CLKDEV_DEV_ID("sh-sci.7",               &mstp_clks[MSTP222]),
         CLKDEV_DEV_ID("sh-sci.6",               &mstp_clks[MSTP230]),
 
diff --git a/arch/arm/mach-shmobile/include/mach/dma-register.h b/arch/arm/mach-shmobile/include/mach/dma-register.h
new file mode 100644
index 000000000000..97c40bd9b94f
--- /dev/null
+++ b/arch/arm/mach-shmobile/include/mach/dma-register.h
@@ -0,0 +1,84 @@
+/*
+ * SH-ARM CPU-specific DMA definitions, used by both DMA drivers
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp
+ *
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * Based on arch/sh/include/cpu-sh4/cpu/dma-register.h
+ * Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef DMA_REGISTER_H
+#define DMA_REGISTER_H
+
+/*
+ *              Direct Memory Access Controller
+ */
+
+/* Transmit sizes and respective CHCR register values */
+enum {
+        XMIT_SZ_8BIT            = 0,
+        XMIT_SZ_16BIT           = 1,
+        XMIT_SZ_32BIT           = 2,
+        XMIT_SZ_64BIT           = 7,
+        XMIT_SZ_128BIT          = 3,
+        XMIT_SZ_256BIT          = 4,
+        XMIT_SZ_512BIT          = 5,
+};
+
+/* log2(size / 8) - used to calculate number of transfers */
+static const unsigned int dma_ts_shift[] = {
+        [XMIT_SZ_8BIT]          = 0,
+        [XMIT_SZ_16BIT]         = 1,
+        [XMIT_SZ_32BIT]         = 2,
+        [XMIT_SZ_64BIT]         = 3,
+        [XMIT_SZ_128BIT]        = 4,
+        [XMIT_SZ_256BIT]        = 5,
+        [XMIT_SZ_512BIT]        = 6,
+};
+
+#define TS_LOW_BIT      0x3 /* --xx */
+#define TS_HI_BIT       0xc /* xx-- */
+
+#define TS_LOW_SHIFT    (3)
+#define TS_HI_SHIFT     (20 - 2)        /* 2 bits for shifted low TS */
+
+#define TS_INDEX2VAL(i) \
+        ((((i) & TS_LOW_BIT) << TS_LOW_SHIFT) |\
+         (((i) & TS_HI_BIT)  << TS_HI_SHIFT))
+
+#define CHCR_TX(xmit_sz) (DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL((xmit_sz)))
+#define CHCR_RX(xmit_sz) (DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL((xmit_sz)))
+
+
+/*
+ *              USB High-Speed DMAC
+ */
+/* Transmit sizes and respective CHCR register values */
+enum {
+        USBTS_XMIT_SZ_8BYTE             = 0,
+        USBTS_XMIT_SZ_16BYTE            = 1,
+        USBTS_XMIT_SZ_32BYTE            = 2,
+};
+
+/* log2(size / 8) - used to calculate number of transfers */
+static const unsigned int dma_usbts_shift[] = {
+        [USBTS_XMIT_SZ_8BYTE]   = 3,
+        [USBTS_XMIT_SZ_16BYTE]  = 4,
+        [USBTS_XMIT_SZ_32BYTE]  = 5,
+};
+
+#define USBTS_LOW_BIT   0x3 /* --xx */
+#define USBTS_HI_BIT    0x0 /* ---- */
+
+#define USBTS_LOW_SHIFT 6
+#define USBTS_HI_SHIFT  0
+
+#define USBTS_INDEX2VAL(i) (((i) & 3) << 6)
+
+#endif /* DMA_REGISTER_H */
diff --git a/arch/arm/mach-shmobile/include/mach/gpio.h b/arch/arm/mach-shmobile/include/mach/gpio.h
index de795b42232a..844507d937cb 100644
--- a/arch/arm/mach-shmobile/include/mach/gpio.h
+++ b/arch/arm/mach-shmobile/include/mach/gpio.h
@@ -13,6 +13,7 @@
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/sh_pfc.h>
+#include <linux/io.h>
 
 #ifdef CONFIG_GPIOLIB
 
@@ -27,4 +28,35 @@ static inline int irq_to_gpio(unsigned int irq)
 
 #endif /* CONFIG_GPIOLIB */
 
+/*
+ * FIXME !!
+ *
+ * current gpio frame work doesn't have
+ * the method to control only pull up/down/free.
+ * this function should be replaced by correct gpio function
+ */
+static inline void __init gpio_direction_none(u32 addr)
+{
+        __raw_writeb(0x00, addr);
+}
+
+static inline void __init gpio_request_pullup(u32 addr)
+{
+        u8 data = __raw_readb(addr);
+
+        data &= 0x0F;
+        data |= 0xC0;
+        __raw_writeb(data, addr);
+}
+
+static inline void __init gpio_request_pulldown(u32 addr)
+{
+        u8 data = __raw_readb(addr);
+
+        data &= 0x0F;
+        data |= 0xA0;
+
+        __raw_writeb(data, addr);
+}
+
 #endif /* __ASM_ARCH_GPIO_H */
diff --git a/arch/arm/mach-shmobile/include/mach/r8a7740.h b/arch/arm/mach-shmobile/include/mach/r8a7740.h
index 6468fcc5ee49..8bd7b9c136a1 100644
--- a/arch/arm/mach-shmobile/include/mach/r8a7740.h
+++ b/arch/arm/mach-shmobile/include/mach/r8a7740.h
@@ -588,4 +588,20 @@ enum {
         GPIO_FN_TRACEAUD_FROM_MEMC,
 };
 
+/* DMA slave IDs */
+enum {
+        SHDMA_SLAVE_INVALID,
+        SHDMA_SLAVE_SDHI0_RX,
+        SHDMA_SLAVE_SDHI0_TX,
+        SHDMA_SLAVE_SDHI1_RX,
+        SHDMA_SLAVE_SDHI1_TX,
+        SHDMA_SLAVE_SDHI2_RX,
+        SHDMA_SLAVE_SDHI2_TX,
+        SHDMA_SLAVE_FSIA_RX,
+        SHDMA_SLAVE_FSIA_TX,
+        SHDMA_SLAVE_FSIB_TX,
+        SHDMA_SLAVE_USBHS_TX,
+        SHDMA_SLAVE_USBHS_RX,
+};
+
 #endif /* __ASM_R8A7740_H__ */
diff --git a/arch/arm/mach-shmobile/setup-r8a7740.c b/arch/arm/mach-shmobile/setup-r8a7740.c
index 366311b3dc73..48d7bbf0d2e2 100644
--- a/arch/arm/mach-shmobile/setup-r8a7740.c
+++ b/arch/arm/mach-shmobile/setup-r8a7740.c
@@ -24,7 +24,10 @@
 #include <linux/io.h>
 #include <linux/platform_device.h>
 #include <linux/serial_sci.h>
+#include <linux/sh_dma.h>
 #include <linux/sh_timer.h>
+#include <linux/dma-mapping.h>
+#include <mach/dma-register.h>
 #include <mach/r8a7740.h>
 #include <mach/common.h>
 #include <mach/irqs.h>
@@ -276,6 +279,272 @@ static struct platform_device *r8a7740_early_devices[] __initdata = {
         &cmt10_device,
 };
 
+/* DMA */
+static const struct sh_dmae_slave_config r8a7740_dmae_slaves[] = {
+        {
+                .slave_id       = SHDMA_SLAVE_SDHI0_TX,
+                .addr           = 0xe6850030,
+                .chcr           = CHCR_TX(XMIT_SZ_16BIT),
+                .mid_rid        = 0xc1,
+        }, {
+                .slave_id       = SHDMA_SLAVE_SDHI0_RX,
+                .addr           = 0xe6850030,
+                .chcr           = CHCR_RX(XMIT_SZ_16BIT),
+                .mid_rid        = 0xc2,
+        }, {
+                .slave_id       = SHDMA_SLAVE_SDHI1_TX,
+                .addr           = 0xe6860030,
+                .chcr           = CHCR_TX(XMIT_SZ_16BIT),
+                .mid_rid        = 0xc9,
+        }, {
+                .slave_id       = SHDMA_SLAVE_SDHI1_RX,
+                .addr           = 0xe6860030,
+                .chcr           = CHCR_RX(XMIT_SZ_16BIT),
+                .mid_rid        = 0xca,
+        }, {
+                .slave_id       = SHDMA_SLAVE_SDHI2_TX,
+                .addr           = 0xe6870030,
+                .chcr           = CHCR_TX(XMIT_SZ_16BIT),
+                .mid_rid        = 0xcd,
+        }, {
+                .slave_id       = SHDMA_SLAVE_SDHI2_RX,
+                .addr           = 0xe6870030,
+                .chcr           = CHCR_RX(XMIT_SZ_16BIT),
+                .mid_rid        = 0xce,
+        }, {
+                .slave_id       = SHDMA_SLAVE_FSIA_TX,
+                .addr           = 0xfe1f0024,
+                .chcr           = CHCR_TX(XMIT_SZ_32BIT),
+                .mid_rid        = 0xb1,
+        }, {
+                .slave_id       = SHDMA_SLAVE_FSIA_RX,
+                .addr           = 0xfe1f0020,
+                .chcr           = CHCR_RX(XMIT_SZ_32BIT),
+                .mid_rid        = 0xb2,
+        }, {
+                .slave_id       = SHDMA_SLAVE_FSIB_TX,
+                .addr           = 0xfe1f0064,
+                .chcr           = CHCR_TX(XMIT_SZ_32BIT),
+                .mid_rid        = 0xb5,
+        },
+};
+
+#define DMA_CHANNEL(a, b, c)                    \
+{                                               \
+        .offset         = a,                    \
+        .dmars          = b,                    \
+        .dmars_bit      = c,                    \
+        .chclr_offset   = (0x220 - 0x20) + a    \
+}
+
+static const struct sh_dmae_channel r8a7740_dmae_channels[] = {
+        DMA_CHANNEL(0x00, 0, 0),
+        DMA_CHANNEL(0x10, 0, 8),
+        DMA_CHANNEL(0x20, 4, 0),
+        DMA_CHANNEL(0x30, 4, 8),
+        DMA_CHANNEL(0x50, 8, 0),
+        DMA_CHANNEL(0x60, 8, 8),
+};
+
+static struct sh_dmae_pdata dma_platform_data = {
+        .slave          = r8a7740_dmae_slaves,
+        .slave_num      = ARRAY_SIZE(r8a7740_dmae_slaves),
+        .channel        = r8a7740_dmae_channels,
+        .channel_num    = ARRAY_SIZE(r8a7740_dmae_channels),
+        .ts_low_shift   = TS_LOW_SHIFT,
+        .ts_low_mask    = TS_LOW_BIT << TS_LOW_SHIFT,
+        .ts_high_shift  = TS_HI_SHIFT,
+        .ts_high_mask   = TS_HI_BIT << TS_HI_SHIFT,
+        .ts_shift       = dma_ts_shift,
+        .ts_shift_num   = ARRAY_SIZE(dma_ts_shift),
+        .dmaor_init     = DMAOR_DME,
+        .chclr_present  = 1,
+};
+
+/* Resource order important! */
+static struct resource r8a7740_dmae0_resources[] = {
+        {
+                /* Channel registers and DMAOR */
+                .start  = 0xfe008020,
+                .end    = 0xfe00828f,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                /* DMARSx */
+                .start  = 0xfe009000,
+                .end    = 0xfe00900b,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .name   = "error_irq",
+                .start  = evt2irq(0x20c0),
+                .end    = evt2irq(0x20c0),
+                .flags  = IORESOURCE_IRQ,
+        },
+        {
+                /* IRQ for channels 0-5 */
+                .start  = evt2irq(0x2000),
+                .end    = evt2irq(0x20a0),
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+/* Resource order important! */
+static struct resource r8a7740_dmae1_resources[] = {
+        {
+                /* Channel registers and DMAOR */
+                .start  = 0xfe018020,
+                .end    = 0xfe01828f,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                /* DMARSx */
+                .start  = 0xfe019000,
+                .end    = 0xfe01900b,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .name   = "error_irq",
+                .start  = evt2irq(0x21c0),
+                .end    = evt2irq(0x21c0),
+                .flags  = IORESOURCE_IRQ,
+        },
+        {
+                /* IRQ for channels 0-5 */
+                .start  = evt2irq(0x2100),
+                .end    = evt2irq(0x21a0),
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+/* Resource order important! */
+static struct resource r8a7740_dmae2_resources[] = {
+        {
+                /* Channel registers and DMAOR */
+                .start  = 0xfe028020,
+                .end    = 0xfe02828f,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                /* DMARSx */
+                .start  = 0xfe029000,
+                .end    = 0xfe02900b,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .name   = "error_irq",
+                .start  = evt2irq(0x22c0),
+                .end    = evt2irq(0x22c0),
+                .flags  = IORESOURCE_IRQ,
+        },
+        {
+                /* IRQ for channels 0-5 */
+                .start  = evt2irq(0x2200),
+                .end    = evt2irq(0x22a0),
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device dma0_device = {
+        .name           = "sh-dma-engine",
+        .id             = 0,
+        .resource       = r8a7740_dmae0_resources,
+        .num_resources  = ARRAY_SIZE(r8a7740_dmae0_resources),
+        .dev            = {
+                .platform_data  = &dma_platform_data,
+        },
+};
+
+static struct platform_device dma1_device = {
+        .name           = "sh-dma-engine",
+        .id             = 1,
+        .resource       = r8a7740_dmae1_resources,
+        .num_resources  = ARRAY_SIZE(r8a7740_dmae1_resources),
+        .dev            = {
+                .platform_data  = &dma_platform_data,
+        },
+};
+
+static struct platform_device dma2_device = {
+        .name           = "sh-dma-engine",
+        .id             = 2,
+        .resource       = r8a7740_dmae2_resources,
+        .num_resources  = ARRAY_SIZE(r8a7740_dmae2_resources),
+        .dev            = {
+                .platform_data  = &dma_platform_data,
+        },
+};
+
+/* USB-DMAC */
+static const struct sh_dmae_channel r8a7740_usb_dma_channels[] = {
+        {
+                .offset = 0,
+        }, {
+                .offset = 0x20,
+        },
+};
+
+static const struct sh_dmae_slave_config r8a7740_usb_dma_slaves[] = {
+        {
+                .slave_id       = SHDMA_SLAVE_USBHS_TX,
+                .chcr           = USBTS_INDEX2VAL(USBTS_XMIT_SZ_8BYTE),
+        }, {
+                .slave_id       = SHDMA_SLAVE_USBHS_RX,
+                .chcr           = USBTS_INDEX2VAL(USBTS_XMIT_SZ_8BYTE),
+        },
+};
+
+static struct sh_dmae_pdata usb_dma_platform_data = {
+        .slave          = r8a7740_usb_dma_slaves,
+        .slave_num      = ARRAY_SIZE(r8a7740_usb_dma_slaves),
+        .channel        = r8a7740_usb_dma_channels,
+        .channel_num    = ARRAY_SIZE(r8a7740_usb_dma_channels),
+        .ts_low_shift   = USBTS_LOW_SHIFT,
+        .ts_low_mask    = USBTS_LOW_BIT << USBTS_LOW_SHIFT,
+        .ts_high_shift  = USBTS_HI_SHIFT,
+        .ts_high_mask   = USBTS_HI_BIT << USBTS_HI_SHIFT,
+        .ts_shift       = dma_usbts_shift,
+        .ts_shift_num   = ARRAY_SIZE(dma_usbts_shift),
+        .dmaor_init     = DMAOR_DME,
+        .chcr_offset    = 0x14,
+        .chcr_ie_bit    = 1 << 5,
+        .dmaor_is_32bit = 1,
+        .needs_tend_set = 1,
+        .no_dmars       = 1,
+        .slave_only     = 1,
+};
+
+static struct resource r8a7740_usb_dma_resources[] = {
+        {
+                /* Channel registers and DMAOR */
+                .start  = 0xe68a0020,
+                .end    = 0xe68a0064 - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                /* VCR/SWR/DMICR */
+                .start  = 0xe68a0000,
+                .end    = 0xe68a0014 - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                /* IRQ for channels */
+                .start  = evt2irq(0x0a00),
+                .end    = evt2irq(0x0a00),
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device usb_dma_device = {
+        .name           = "sh-dma-engine",
+        .id             = 3,
+        .resource       = r8a7740_usb_dma_resources,
+        .num_resources  = ARRAY_SIZE(r8a7740_usb_dma_resources),
+        .dev            = {
+                .platform_data  = &usb_dma_platform_data,
+        },
+};
+
 /* I2C */
 static struct resource i2c0_resources[] = {
         [0] = {
@@ -322,6 +591,10 @@ static struct platform_device i2c1_device = {
 static struct platform_device *r8a7740_late_devices[] __initdata = {
         &i2c0_device,
         &i2c1_device,
+        &dma0_device,
+        &dma1_device,
+        &dma2_device,
+        &usb_dma_device,
 };
 
 /*