ARM: shmobile: bockw: add R-Car sound support (PIO)

This patch enables R-Car sound,
AK4643 (CN19) and AK4554 (CN20/CN21) codec chip
on Bock-W.

But, it supports PIO transfer only at this point.
User can check sound settings (Dip-switch/PFC etc)
via this patch, but will get under/over flow error
when playback/capture.
Because PIO transfer via SSI will be interrupted
"sampling rate" times per 1 second.

DMA transfer will be supported when HPB-DMAC was
enabled on r8a7778.

You will notice strange ALSA sound card HW
numbering on Bock-W board.
This came from AK4554 strange format on playback/capture.
The format on playback/capture is same on "normal" codec chip,
but AK4554 was different.
Because of that, AK4554 playback/capture are
registered as a different sound card.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
[horms+renesas@verge.net.au: squashed cleanup of SND_SOC_xxx in
 Kconfig by Kuninori Morimoto]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

1 files changed, 273 insertions, 1 deletions

diff --git a/arch/arm/mach-shmobile/board-bockw.c b/arch/arm/mach-shmobile/board-bockw.c
index b998c6b2a270..7ad868d0a047 100644
--- a/arch/arm/mach-shmobile/board-bockw.c
+++ b/arch/arm/mach-shmobile/board-bockw.c
@@ -37,9 +37,12 @@
 #include <mach/irqs.h>
 #include <mach/r8a7778.h>
 #include <asm/mach/arch.h>
+#include <sound/rcar_snd.h>
+#include <sound/simple_card.h>
 
 #define FPGA    0x18200000
 #define IRQ0MR  0x30
+#define COMCTLR 0x101c
 static void __iomem *fpga;
 
 /*
@@ -67,6 +70,35 @@ static void __iomem *fpga;
  * SW19 (MMC)   1 pin
  */
 
+/*
+ *      SSI settings
+ *
+ * SW45: 1-4 side       (SSI5 out, ROUT/LOUT CN19 Mid)
+ * SW46: 1101           (SSI6 Recorde)
+ * SW47: 1110           (SSI5 Playback)
+ * SW48: 11             (Recorde power)
+ * SW49: 1              (SSI slave mode)
+ * SW50: 1111           (SSI7, SSI8)
+ * SW51: 1111           (SSI3, SSI4)
+ * SW54: 1pin           (ak4554 FPGA control)
+ * SW55: 1              (CLKB is 24.5760MHz)
+ * SW60: 1pin           (ak4554 FPGA control)
+ * SW61: 3pin           (use X11 clock)
+ * SW78: 3-6            (ak4642 connects I2C0)
+ *
+ * You can use sound as
+ *
+ * hw0: CN19: SSI56-AK4643
+ * hw1: CN21: SSI3-AK4554(playback)
+ * hw2: CN21: SSI4-AK4554(capture)
+ * hw3: CN20: SSI7-AK4554(playback)
+ * hw4: CN20: SSI8-AK4554(capture)
+ *
+ * this command is required when playback on hw0.
+ *
+ * # amixer set "LINEOUT Mixer DACL" on
+ */
+
 /* Dummy supplies, where voltage doesn't matter */
 static struct regulator_consumer_supply dummy_supplies[] = {
         REGULATOR_SUPPLY("vddvario", "smsc911x"),
@@ -122,7 +154,9 @@ static struct sh_eth_plat_data ether_platform_data __initdata = {
 static struct i2c_board_info i2c0_devices[] = {
         {
                 I2C_BOARD_INFO("rx8581", 0x51),
-        },
+        }, {
+                I2C_BOARD_INFO("ak4643", 0x12),
+        }
 };
 
 /* HSPI*/
@@ -185,7 +219,213 @@ static struct soc_camera_link iclink##idx##_ml86v7667 __initdata = {	\
 BOCKW_CAMERA(0);
 BOCKW_CAMERA(1);
 
+/* Sound */
+static struct resource rsnd_resources[] __initdata = {
+        [RSND_GEN1_SRU] = DEFINE_RES_MEM(0xffd90000, 0x1000),
+        [RSND_GEN1_SSI] = DEFINE_RES_MEM(0xffd91000, 0x1240),
+        [RSND_GEN1_ADG] = DEFINE_RES_MEM(0xfffe0000, 0x24),
+};
+
+static struct rsnd_ssi_platform_info rsnd_ssi[] = {
+        RSND_SSI_UNUSED, /* SSI 0 */
+        RSND_SSI_UNUSED, /* SSI 1 */
+        RSND_SSI_UNUSED, /* SSI 2 */
+        RSND_SSI_SET(1, 0, gic_iid(0x85), RSND_SSI_PLAY),
+        RSND_SSI_SET(2, 0, gic_iid(0x85), RSND_SSI_CLK_PIN_SHARE | RSND_SSI_CLK_FROM_ADG),
+        RSND_SSI_SET(0, 0, gic_iid(0x86), RSND_SSI_PLAY),
+        RSND_SSI_SET(0, 0, gic_iid(0x86), 0),
+        RSND_SSI_SET(3, 0, gic_iid(0x86), RSND_SSI_PLAY),
+        RSND_SSI_SET(4, 0, gic_iid(0x86), RSND_SSI_CLK_PIN_SHARE | RSND_SSI_CLK_FROM_ADG),
+};
+
+static struct rsnd_scu_platform_info rsnd_scu[9] = {
+        /* no member at this point */
+};
+
+enum {
+        AK4554_34 = 0,
+        AK4643_56,
+        AK4554_78,
+        SOUND_MAX,
+};
+
+static int rsnd_codec_power(int id, int enable)
+{
+        static int sound_user[SOUND_MAX] = {0, 0, 0};
+        int *usr = NULL;
+        u32 bit;
+
+        switch (id) {
+        case 3:
+        case 4:
+                usr = sound_user + AK4554_34;
+                bit = (1 << 10);
+                break;
+        case 5:
+        case 6:
+                usr = sound_user + AK4643_56;
+                bit = (1 << 6);
+                break;
+        case 7:
+        case 8:
+                usr = sound_user + AK4554_78;
+                bit = (1 << 7);
+                break;
+        }
+
+        if (!usr)
+                return -EIO;
+
+        if (enable) {
+                if (*usr == 0) {
+                        u32 val = ioread16(fpga + COMCTLR);
+                        val &= ~bit;
+                        iowrite16(val, fpga + COMCTLR);
+                }
+
+                (*usr)++;
+        } else {
+                if (*usr == 0)
+                        return 0;
+
+                (*usr)--;
+
+                if (*usr == 0) {
+                        u32 val = ioread16(fpga + COMCTLR);
+                        val |= bit;
+                        iowrite16(val, fpga + COMCTLR);
+                }
+        }
+
+        return 0;
+}
+
+static int rsnd_start(int id)
+{
+        return rsnd_codec_power(id, 1);
+}
+
+static int rsnd_stop(int id)
+{
+        return rsnd_codec_power(id, 0);
+}
+
+static struct rcar_snd_info rsnd_info = {
+        .flags          = RSND_GEN1,
+        .ssi_info       = rsnd_ssi,
+        .ssi_info_nr    = ARRAY_SIZE(rsnd_ssi),
+        .scu_info       = rsnd_scu,
+        .scu_info_nr    = ARRAY_SIZE(rsnd_scu),
+        .start          = rsnd_start,
+        .stop           = rsnd_stop,
+};
+
+static struct asoc_simple_card_info rsnd_card_info[] = {
+        /* SSI5, SSI6 */
+        {
+                .name           = "AK4643",
+                .card           = "SSI56-AK4643",
+                .codec          = "ak4642-codec.0-0012",
+                .platform       = "rcar_sound",
+                .daifmt         = SND_SOC_DAIFMT_LEFT_J,
+                .cpu_dai = {
+                        .name   = "rsnd-dai.0",
+                        .fmt    = SND_SOC_DAIFMT_CBS_CFS,
+                },
+                .codec_dai = {
+                        .name   = "ak4642-hifi",
+                        .fmt    = SND_SOC_DAIFMT_CBM_CFM,
+                        .sysclk = 11289600,
+                },
+        },
+        /* SSI3 */
+        {
+                .name           = "AK4554",
+                .card           = "SSI3-AK4554(playback)",
+                .codec          = "ak4554-adc-dac.0",
+                .platform       = "rcar_sound",
+                .cpu_dai = {
+                        .name   = "rsnd-dai.1",
+                        .fmt    = SND_SOC_DAIFMT_CBM_CFM |
+                                  SND_SOC_DAIFMT_RIGHT_J,
+                },
+                .codec_dai = {
+                        .name   = "ak4554-hifi",
+                },
+        },
+        /* SSI4 */
+        {
+                .name           = "AK4554",
+                .card           = "SSI4-AK4554(capture)",
+                .codec          = "ak4554-adc-dac.0",
+                .platform       = "rcar_sound",
+                .cpu_dai = {
+                        .name   = "rsnd-dai.2",
+                        .fmt    = SND_SOC_DAIFMT_CBM_CFM |
+                                  SND_SOC_DAIFMT_LEFT_J,
+                },
+                .codec_dai = {
+                        .name   = "ak4554-hifi",
+                },
+        },
+        /* SSI7 */
+        {
+                .name           = "AK4554",
+                .card           = "SSI7-AK4554(playback)",
+                .codec          = "ak4554-adc-dac.1",
+                .platform       = "rcar_sound",
+                .cpu_dai = {
+                        .name   = "rsnd-dai.3",
+                        .fmt    = SND_SOC_DAIFMT_CBM_CFM |
+                                  SND_SOC_DAIFMT_RIGHT_J,
+                },
+                .codec_dai = {
+                        .name   = "ak4554-hifi",
+                },
+        },
+        /* SSI8 */
+        {
+                .name           = "AK4554",
+                .card           = "SSI8-AK4554(capture)",
+                .codec          = "ak4554-adc-dac.1",
+                .platform       = "rcar_sound",
+                .cpu_dai = {
+                        .name   = "rsnd-dai.4",
+                        .fmt    = SND_SOC_DAIFMT_CBM_CFM |
+                                  SND_SOC_DAIFMT_LEFT_J,
+                },
+                .codec_dai = {
+                        .name   = "ak4554-hifi",
+                },
+        }
+};
+
 static const struct pinctrl_map bockw_pinctrl_map[] = {
+        /* AUDIO */
+        PIN_MAP_MUX_GROUP_DEFAULT("rcar_sound", "pfc-r8a7778",
+                                  "audio_clk_a", "audio_clk"),
+        PIN_MAP_MUX_GROUP_DEFAULT("rcar_sound", "pfc-r8a7778",
+                                  "audio_clk_b", "audio_clk"),
+        PIN_MAP_MUX_GROUP_DEFAULT("rcar_sound", "pfc-r8a7778",
+                                  "ssi34_ctrl", "ssi"),
+        PIN_MAP_MUX_GROUP_DEFAULT("rcar_sound", "pfc-r8a7778",
+                                  "ssi3_data", "ssi"),
+        PIN_MAP_MUX_GROUP_DEFAULT("rcar_sound", "pfc-r8a7778",
+                                  "ssi4_data", "ssi"),
+        PIN_MAP_MUX_GROUP_DEFAULT("rcar_sound", "pfc-r8a7778",
+                                  "ssi5_ctrl", "ssi"),
+        PIN_MAP_MUX_GROUP_DEFAULT("rcar_sound", "pfc-r8a7778",
+                                  "ssi5_data", "ssi"),
+        PIN_MAP_MUX_GROUP_DEFAULT("rcar_sound", "pfc-r8a7778",
+                                  "ssi6_ctrl", "ssi"),
+        PIN_MAP_MUX_GROUP_DEFAULT("rcar_sound", "pfc-r8a7778",
+                                  "ssi6_data", "ssi"),
+        PIN_MAP_MUX_GROUP_DEFAULT("rcar_sound", "pfc-r8a7778",
+                                  "ssi78_ctrl", "ssi"),
+        PIN_MAP_MUX_GROUP_DEFAULT("rcar_sound", "pfc-r8a7778",
+                                  "ssi7_data", "ssi"),
+        PIN_MAP_MUX_GROUP_DEFAULT("rcar_sound", "pfc-r8a7778",
+                                  "ssi8_data", "ssi"),
         /* Ether */
         PIN_MAP_MUX_GROUP_DEFAULT("r8a777x-ether", "pfc-r8a7778",
                                   "ether_rmii", "ether"),
@@ -233,6 +473,8 @@ static const struct pinctrl_map bockw_pinctrl_map[] = {
 static void __init bockw_init(void)
 {
         void __iomem *base;
+        struct clk *clk;
+        int i;
 
         r8a7778_clock_init();
         r8a7778_init_irq_extpin(1);
@@ -309,6 +551,36 @@ static void __init bockw_init(void)
                         sdhi0_resources, ARRAY_SIZE(sdhi0_resources),
                         &sdhi0_info, sizeof(struct sh_mobile_sdhi_info));
         }
+
+        /* for Audio */
+        clk = clk_get(NULL, "audio_clk_b");
+        clk_set_rate(clk, 24576000);
+        clk_put(clk);
+        rsnd_codec_power(5, 1); /* enable ak4642 */
+
+        platform_device_register_simple(
+                "ak4554-adc-dac", 0, NULL, 0);
+
+        platform_device_register_simple(
+                "ak4554-adc-dac", 1, NULL, 0);
+
+        platform_device_register_resndata(
+                &platform_bus, "rcar_sound", -1,
+                rsnd_resources, ARRAY_SIZE(rsnd_resources),
+                &rsnd_info, sizeof(rsnd_info));
+
+        for (i = 0; i < ARRAY_SIZE(rsnd_card_info); i++) {
+                struct platform_device_info cardinfo = {
+                        .parent         = &platform_bus,
+                        .name           = "asoc-simple-card",
+                        .id             = i,
+                        .data           = &rsnd_card_info[i],
+                        .size_data      = sizeof(struct asoc_simple_card_info),
+                        .dma_mask       = ~0,
+                };
+
+                platform_device_register_full(&cardinfo);
+        }
 }
 
 static const char *bockw_boards_compat_dt[] __initdata = {