ARM: shmobile: r8a73a4: add a DMAC platform device and clock for it

Add a DMAC platform device and clock definitions for it on r8a73a4.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

3 files changed, 103 insertions, 1 deletions

diff --git a/arch/arm/mach-shmobile/clock-r8a73a4.c b/arch/arm/mach-shmobile/clock-r8a73a4.c
index 8ea5ef6c79cc..357b9bca7940 100644
--- a/arch/arm/mach-shmobile/clock-r8a73a4.c
+++ b/arch/arm/mach-shmobile/clock-r8a73a4.c
@@ -504,7 +504,7 @@ static struct clk div6_clks[DIV6_NR] = {
 
 /* MSTP */
 enum {
-        MSTP217, MSTP216, MSTP207, MSTP206, MSTP204, MSTP203,
+        MSTP218, MSTP217, MSTP216, MSTP207, MSTP206, MSTP204, MSTP203,
         MSTP329, MSTP323, MSTP318, MSTP317, MSTP316,
         MSTP315, MSTP314, MSTP313, MSTP312, MSTP305, MSTP300,
         MSTP411, MSTP410, MSTP409,
@@ -519,6 +519,7 @@ static struct clk mstp_clks[MSTP_NR] = {
         [MSTP207] = SH_CLK_MSTP32(&div6_clks[DIV6_MP],  SMSTPCR2, 7, 0), /* SCIFB1 */
         [MSTP216] = SH_CLK_MSTP32(&div6_clks[DIV6_MP],  SMSTPCR2, 16, 0), /* SCIFB2 */
         [MSTP217] = SH_CLK_MSTP32(&div6_clks[DIV6_MP],  SMSTPCR2, 17, 0), /* SCIFB3 */
+        [MSTP218] = SH_CLK_MSTP32(&div4_clks[DIV4_HP],  SMSTPCR2, 18, 0), /* DMAC */
         [MSTP300] = SH_CLK_MSTP32(&div4_clks[DIV4_HP],  SMSTPCR3, 0, 0), /* IIC2 */
         [MSTP305] = SH_CLK_MSTP32(&div6_clks[DIV6_MMC1],SMSTPCR3, 5, 0), /* MMCIF1 */
         [MSTP312] = SH_CLK_MSTP32(&div6_clks[DIV6_SDHI2],SMSTPCR3, 12, 0), /* SDHI2 */
@@ -578,6 +579,7 @@ static struct clk_lookup lookups[] = {
         CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP207]),
         CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP216]),
         CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP217]),
+        CLKDEV_DEV_ID("sh-dma-engine.0", &mstp_clks[MSTP218]),
         CLKDEV_DEV_ID("rcar_thermal", &mstp_clks[MSTP522]),
         CLKDEV_DEV_ID("e6520000.i2c", &mstp_clks[MSTP300]),
         CLKDEV_DEV_ID("sh_mmcif.1", &mstp_clks[MSTP305]),
diff --git a/arch/arm/mach-shmobile/include/mach/r8a73a4.h b/arch/arm/mach-shmobile/include/mach/r8a73a4.h
index 5214338a6a47..ce8bdd1d8a8a 100644
--- a/arch/arm/mach-shmobile/include/mach/r8a73a4.h
+++ b/arch/arm/mach-shmobile/include/mach/r8a73a4.h
@@ -1,6 +1,15 @@
 #ifndef __ASM_R8A73A4_H__
 #define __ASM_R8A73A4_H__
 
+/* DMA slave IDs */
+enum {
+        SHDMA_SLAVE_INVALID,
+        SHDMA_SLAVE_MMCIF0_TX,
+        SHDMA_SLAVE_MMCIF0_RX,
+        SHDMA_SLAVE_MMCIF1_TX,
+        SHDMA_SLAVE_MMCIF1_RX,
+};
+
 void r8a73a4_add_standard_devices(void);
 void r8a73a4_add_dt_devices(void);
 void r8a73a4_clock_init(void);
diff --git a/arch/arm/mach-shmobile/setup-r8a73a4.c b/arch/arm/mach-shmobile/setup-r8a73a4.c
index 53a896275cae..b0f2749071be 100644
--- a/arch/arm/mach-shmobile/setup-r8a73a4.c
+++ b/arch/arm/mach-shmobile/setup-r8a73a4.c
@@ -22,8 +22,10 @@
 #include <linux/of_platform.h>
 #include <linux/platform_data/irq-renesas-irqc.h>
 #include <linux/serial_sci.h>
+#include <linux/sh_dma.h>
 #include <linux/sh_timer.h>
 #include <mach/common.h>
+#include <mach/dma-register.h>
 #include <mach/irqs.h>
 #include <mach/r8a73a4.h>
 #include <asm/mach/arch.h>
@@ -199,12 +201,101 @@ void __init r8a73a4_add_dt_devices(void)
         r8a7790_register_cmt(10);
 }
 
+/* DMA */
+static const struct sh_dmae_slave_config dma_slaves[] = {
+        {
+                .slave_id       = SHDMA_SLAVE_MMCIF0_TX,
+                .addr           = 0xee200034,
+                .chcr           = CHCR_TX(XMIT_SZ_32BIT),
+                .mid_rid        = 0xd1,
+        }, {
+                .slave_id       = SHDMA_SLAVE_MMCIF0_RX,
+                .addr           = 0xee200034,
+                .chcr           = CHCR_RX(XMIT_SZ_32BIT),
+                .mid_rid        = 0xd2,
+        }, {
+                .slave_id       = SHDMA_SLAVE_MMCIF1_TX,
+                .addr           = 0xee220034,
+                .chcr           = CHCR_TX(XMIT_SZ_32BIT),
+                .mid_rid        = 0xe1,
+        }, {
+                .slave_id       = SHDMA_SLAVE_MMCIF1_RX,
+                .addr           = 0xee220034,
+                .chcr           = CHCR_RX(XMIT_SZ_32BIT),
+                .mid_rid        = 0xe2,
+        },
+};
+
+#define DMAE_CHANNEL(a, b)                              \
+        {                                               \
+                .offset         = (a) - 0x20,           \
+                .dmars          = (a) - 0x20 + 0x40,    \
+                .chclr_bit      = (b),                  \
+                .chclr_offset   = 0x80 - 0x20,          \
+        }
+
+static const struct sh_dmae_channel dma_channels[] = {
+        DMAE_CHANNEL(0x8000, 0),
+        DMAE_CHANNEL(0x8080, 1),
+        DMAE_CHANNEL(0x8100, 2),
+        DMAE_CHANNEL(0x8180, 3),
+        DMAE_CHANNEL(0x8200, 4),
+        DMAE_CHANNEL(0x8280, 5),
+        DMAE_CHANNEL(0x8300, 6),
+        DMAE_CHANNEL(0x8380, 7),
+        DMAE_CHANNEL(0x8400, 8),
+        DMAE_CHANNEL(0x8480, 9),
+        DMAE_CHANNEL(0x8500, 10),
+        DMAE_CHANNEL(0x8580, 11),
+        DMAE_CHANNEL(0x8600, 12),
+        DMAE_CHANNEL(0x8680, 13),
+        DMAE_CHANNEL(0x8700, 14),
+        DMAE_CHANNEL(0x8780, 15),
+        DMAE_CHANNEL(0x8800, 16),
+        DMAE_CHANNEL(0x8880, 17),
+        DMAE_CHANNEL(0x8900, 18),
+        DMAE_CHANNEL(0x8980, 19),
+};
+
+static const struct sh_dmae_pdata dma_pdata = {
+        .slave          = dma_slaves,
+        .slave_num      = ARRAY_SIZE(dma_slaves),
+        .channel        = dma_channels,
+        .channel_num    = ARRAY_SIZE(dma_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,
+        .chclr_bitwise  = 1,
+};
+
+static struct resource dma_resources[] = {
+        DEFINE_RES_MEM(0xe6700020, 0x89e0),
+        DEFINE_RES_IRQ_NAMED(gic_spi(220), "error_irq"),
+        {
+                /* IRQ for channels 0-19 */
+                .start  = gic_spi(200),
+                .end    = gic_spi(219),
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+#define r8a73a4_register_dmac()                                                 \
+        platform_device_register_resndata(&platform_bus, "sh-dma-engine", 0,    \
+                                dma_resources, ARRAY_SIZE(dma_resources),       \
+                                &dma_pdata, sizeof(dma_pdata))
+
 void __init r8a73a4_add_standard_devices(void)
 {
         r8a73a4_add_dt_devices();
         r8a73a4_register_irqc(0);
         r8a73a4_register_irqc(1);
         r8a73a4_register_thermal();
+        r8a73a4_register_dmac();
 }
 
 void __init r8a73a4_init_early(void)