ASoC: fsi: Add new funtion for SPDIF

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 55 insertions, 5 deletions

diff --git a/sound/soc/sh/fsi.c b/sound/soc/sh/fsi.c
index 4b09b3dfcc00..58c6bec642de 100644
--- a/sound/soc/sh/fsi.c
+++ b/sound/soc/sh/fsi.c
@@ -30,9 +30,11 @@
 #define DIDT            0x0020
 #define DODT            0x0024
 #define MUTE_ST         0x0028
-#define REG_END         MUTE_ST
-
+#define OUT_SEL         0x0030
+#define REG_END         OUT_SEL
 
+#define A_MST_CTLR      0x0180
+#define B_MST_CTLR      0x01A0
 #define CPU_INT_ST      0x01F4
 #define CPU_IEMSK       0x01F8
 #define CPU_IMSK        0x01FC
@@ -43,7 +45,7 @@
 #define CLK_RST         0x0210
 #define SOFT_RST        0x0214
 #define FIFO_SZ         0x0218
-#define MREG_START      CPU_INT_ST
+#define MREG_START      A_MST_CTLR
 #define MREG_END        FIFO_SZ
 
 /* DO_FMT */
@@ -54,6 +56,7 @@
 #define CR_I2S          (0x3 << 4)
 #define CR_TDM          (0x4 << 4)
 #define CR_TDM_D        (0x5 << 4)
+#define CR_SPDIF        0x00100120
 
 /* DOFF_CTL */
 /* DIFF_CTL */
@@ -69,6 +72,10 @@
 #define ACKMD_MASK      0x00007000
 #define BPFMD_MASK      0x00000700
 
+/* A/B MST_CTLR */
+#define BP      (1 << 4)        /* Fix the signal of Biphase output */
+#define SE      (1 << 0)        /* Fix the master clock */
+
 /* CLK_RST */
 #define B_CLK           0x00000010
 #define A_CLK           0x00000001
@@ -113,6 +120,8 @@ struct fsi_priv {
         int period_len;
         int buffer_len;
         int periods;
+
+        u32 mst_ctrl;
 };
 
 struct fsi_core {
@@ -395,6 +404,29 @@ static void fsi_irq_clear_status(struct fsi_priv *fsi)
 /************************************************************************
 
 
+                SPDIF master clock function
+
+These functions are used later FSI2
+************************************************************************/
+static void fsi_spdif_clk_ctrl(struct fsi_priv *fsi, int enable)
+{
+        struct fsi_master *master = fsi_get_master(fsi);
+        u32 val = BP | SE;
+
+        if (master->core->ver < 2) {
+                pr_err("fsi: register access err (%s)\n", __func__);
+                return;
+        }
+
+        if (enable)
+                fsi_master_mask_set(master, fsi->mst_ctrl, val, val);
+        else
+                fsi_master_mask_set(master, fsi->mst_ctrl, val, 0);
+}
+
+/************************************************************************
+
+
                 ctrl function
 
 
@@ -671,6 +703,7 @@ static int fsi_dai_startup(struct snd_pcm_substream *substream,
 {
         struct fsi_priv *fsi = fsi_get_priv(substream);
         u32 flags = fsi_get_info_flags(fsi);
+        struct fsi_master *master = fsi_get_master(fsi);
         u32 fmt;
         u32 reg;
         u32 data;
@@ -732,6 +765,16 @@ static int fsi_dai_startup(struct snd_pcm_substream *substream,
                         SH_FSI_GET_CH_O(flags) : SH_FSI_GET_CH_I(flags);
                 data = CR_TDM_D | (fsi->chan - 1);
                 break;
+        case SH_FSI_FMT_SPDIF:
+                if (master->core->ver < 2) {
+                        dev_err(dai->dev, "This FSI can not use SPDIF\n");
+                        return -EINVAL;
+                }
+                data = CR_SPDIF;
+                fsi->chan = 2;
+                fsi_spdif_clk_ctrl(fsi, 1);
+                fsi_reg_mask_set(fsi, OUT_SEL, 0x0010, 0x0010);
+                break;
         default:
                 dev_err(dai->dev, "unknown format.\n");
                 return -EINVAL;
@@ -1071,14 +1114,21 @@ static int fsi_probe(struct platform_device *pdev)
                 goto exit_kfree;
         }
 
+        /* master setting */
         master->irq             = irq;
         master->info            = pdev->dev.platform_data;
+        master->core            = (struct fsi_core *)id_entry->driver_data;
+        spin_lock_init(&master->lock);
+
+        /* FSI A setting */
         master->fsia.base       = master->base;
         master->fsia.master     = master;
+        master->fsia.mst_ctrl   = A_MST_CTLR;
+
+        /* FSI B setting */
         master->fsib.base       = master->base + 0x40;
         master->fsib.master     = master;
-        master->core            = (struct fsi_core *)id_entry->driver_data;
-        spin_lock_init(&master->lock);
+        master->fsib.mst_ctrl   = B_MST_CTLR;
 
         pm_runtime_enable(&pdev->dev);
         pm_runtime_resume(&pdev->dev);