ARM: shmobile: r8a7790: add Audio DMAC support

R-Car H2 has many DMACs
(ex SYS-DMAC, 2D-DMAC, Audio-DMAC, USB-DMAC etc)
and, these DMAEngine needs DMA slave IDs to use it.

This patch adds new DMA slave ID list for r8a7790.
There, common part has RCAR_DMA_xxx prefix,
and Audio DMAC part has AUDIO_DMAC_SLAVE_xxx prefix.

Audio DMAC can be controlled via sh-dma-engine

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

2 files changed, 115 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/include/mach/r8a7790.h b/arch/arm/mach-shmobile/include/mach/r8a7790.h
index 5fbfa28b40b6..2177325af22f 100644
--- a/arch/arm/mach-shmobile/include/mach/r8a7790.h
+++ b/arch/arm/mach-shmobile/include/mach/r8a7790.h
@@ -3,6 +3,31 @@
 
 #include <mach/rcar-gen2.h>
 
+/* DMA slave IDs */
+enum {
+        RCAR_DMA_SLAVE_INVALID,
+        AUDIO_DMAC_SLAVE_SSI0_TX,
+        AUDIO_DMAC_SLAVE_SSI0_RX,
+        AUDIO_DMAC_SLAVE_SSI1_TX,
+        AUDIO_DMAC_SLAVE_SSI1_RX,
+        AUDIO_DMAC_SLAVE_SSI2_TX,
+        AUDIO_DMAC_SLAVE_SSI2_RX,
+        AUDIO_DMAC_SLAVE_SSI3_TX,
+        AUDIO_DMAC_SLAVE_SSI3_RX,
+        AUDIO_DMAC_SLAVE_SSI4_TX,
+        AUDIO_DMAC_SLAVE_SSI4_RX,
+        AUDIO_DMAC_SLAVE_SSI5_TX,
+        AUDIO_DMAC_SLAVE_SSI5_RX,
+        AUDIO_DMAC_SLAVE_SSI6_TX,
+        AUDIO_DMAC_SLAVE_SSI6_RX,
+        AUDIO_DMAC_SLAVE_SSI7_TX,
+        AUDIO_DMAC_SLAVE_SSI7_RX,
+        AUDIO_DMAC_SLAVE_SSI8_TX,
+        AUDIO_DMAC_SLAVE_SSI8_RX,
+        AUDIO_DMAC_SLAVE_SSI9_TX,
+        AUDIO_DMAC_SLAVE_SSI9_RX,
+};
+
 void r8a7790_add_standard_devices(void);
 void r8a7790_add_dt_devices(void);
 void r8a7790_clock_init(void);
diff --git a/arch/arm/mach-shmobile/setup-r8a7790.c b/arch/arm/mach-shmobile/setup-r8a7790.c
index 6ab37aa1e919..c4616f0698c6 100644
--- a/arch/arm/mach-shmobile/setup-r8a7790.c
+++ b/arch/arm/mach-shmobile/setup-r8a7790.c
@@ -24,12 +24,100 @@
 #include <linux/platform_data/gpio-rcar.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/r8a7790.h>
 #include <asm/mach/arch.h>
 
+/* Audio-DMAC */
+#define AUDIO_DMAC_SLAVE(_id, _addr, t, r)                      \
+{                                                               \
+        .slave_id       = AUDIO_DMAC_SLAVE_## _id ##_TX,        \
+        .addr           = _addr + 0x8,                          \
+        .chcr           = CHCR_TX(XMIT_SZ_32BIT),               \
+        .mid_rid        = t,                                    \
+}, {                                                            \
+        .slave_id       = AUDIO_DMAC_SLAVE_## _id ##_RX,        \
+        .addr           = _addr + 0xc,                          \
+        .chcr           = CHCR_RX(XMIT_SZ_32BIT),               \
+        .mid_rid        = r,                                    \
+}
+
+static const struct sh_dmae_slave_config r8a7790_audio_dmac_slaves[] = {
+        AUDIO_DMAC_SLAVE(SSI0, 0xec241000, 0x01, 0x02),
+        AUDIO_DMAC_SLAVE(SSI1, 0xec241040, 0x03, 0x04),
+        AUDIO_DMAC_SLAVE(SSI2, 0xec241080, 0x05, 0x06),
+        AUDIO_DMAC_SLAVE(SSI3, 0xec2410c0, 0x07, 0x08),
+        AUDIO_DMAC_SLAVE(SSI4, 0xec241100, 0x09, 0x0a),
+        AUDIO_DMAC_SLAVE(SSI5, 0xec241140, 0x0b, 0x0c),
+        AUDIO_DMAC_SLAVE(SSI6, 0xec241180, 0x0d, 0x0e),
+        AUDIO_DMAC_SLAVE(SSI7, 0xec2411c0, 0x0f, 0x10),
+        AUDIO_DMAC_SLAVE(SSI8, 0xec241200, 0x11, 0x12),
+        AUDIO_DMAC_SLAVE(SSI9, 0xec241240, 0x13, 0x14),
+};
+
+#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 r8a7790_audio_dmac_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),
+};
+
+static struct sh_dmae_pdata r8a7790_audio_dmac_platform_data = {
+        .slave          = r8a7790_audio_dmac_slaves,
+        .slave_num      = ARRAY_SIZE(r8a7790_audio_dmac_slaves),
+        .channel        = r8a7790_audio_dmac_channels,
+        .channel_num    = ARRAY_SIZE(r8a7790_audio_dmac_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 r8a7790_audio_dmac_resources[] = {
+        /* Channel registers and DMAOR for low */
+        DEFINE_RES_MEM(0xec700020, 0x8663 - 0x20),
+        DEFINE_RES_IRQ(gic_spi(346)),
+        DEFINE_RES_NAMED(gic_spi(320), 13, NULL, IORESOURCE_IRQ),
+
+        /* Channel registers and DMAOR for hi */
+        DEFINE_RES_MEM(0xec720020, 0x8663 - 0x20), /* hi */
+        DEFINE_RES_IRQ(gic_spi(347)),
+        DEFINE_RES_NAMED(gic_spi(333), 13, NULL, IORESOURCE_IRQ),
+};
+
+#define r8a7790_register_audio_dmac(id)                         \
+        platform_device_register_resndata(                      \
+                &platform_bus, "sh-dma-engine", id,             \
+                &r8a7790_audio_dmac_resources[id * 3],  3,      \
+                &r8a7790_audio_dmac_platform_data,              \
+                sizeof(r8a7790_audio_dmac_platform_data))
+
 static const struct resource pfc_resources[] __initconst = {
         DEFINE_RES_MEM(0xe6060000, 0x250),
 };
@@ -101,6 +189,8 @@ void __init r8a7790_pinmux_init(void)
         r8a7790_register_i2c(1);
         r8a7790_register_i2c(2);
         r8a7790_register_i2c(3);
+        r8a7790_register_audio_dmac(0);
+        r8a7790_register_audio_dmac(1);
 }
 
 #define __R8A7790_SCIF(scif_type, _scscr, index, baseaddr, irq)         \