ENGR00273838-1 ASoC: fsl: Add debug interface for ssi

Add debug interface for ssi to dump its register values.

Acked-by: Wang Shengjiu <b02247@freescale.com>
Signed-off-by: Nicolin Chen <b42378@freescale.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 2b6457038cb1..fd171fdcf932 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -51,6 +51,24 @@ static inline void write_ssi_mask(u32 __iomem *addr, u32 clear, u32 set)
 }
 #endif
 
+#ifdef DEBUG
+#define NUM_OF_SSI_REG (sizeof(struct ccsr_ssi) / sizeof(__be32))
+
+void dump_reg(struct ccsr_ssi __iomem *ssi)
+{
+        u32 val, i;
+
+        for (i = 0; i < NUM_OF_SSI_REG; i++) {
+                if (&ssi->stx0 + i == NULL)
+                        continue;
+                val = read_ssi(&ssi->stx0 + i);
+                pr_debug("REG %x = %x\n", (u32)(&ssi->stx0 + i) & 0xff, val);
+        }
+}
+#else
+void dump_reg(struct ccsr_ssi __iomem *ssi) {}
+#endif
+
 /**
  * FSLSSI_I2S_RATES: sample rates supported by the I2S
  *
@@ -500,6 +518,7 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
                 else
                         write_ssi_mask(&ssi->scr, 0,
                                 CCSR_SSI_SCR_SSIEN | CCSR_SSI_SCR_RE);
+                dump_reg(ssi);
                 break;
 
         case SNDRV_PCM_TRIGGER_STOP: