ASoC: fsi: add valid data position control support

FSI2 can control valid data position, like
package in front/back or stream  mode (16bit x 2).
But current fsi driver is assuming it was in-back.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/sh/fsi.c

@@ -32,7 +32,9 @@
 #define REG_DIDT	0x0020
 #define REG_DODT	0x0024
 #define REG_MUTE_ST	0x0028
+#define REG_OUT_DMAC	0x002C
 #define REG_OUT_SEL	0x0030
+#define REG_IN_DMAC	0x0038
 
 /* master register */
 #define MST_CLK_RST	0x0210
@@ -886,6 +888,8 @@ static int fsi_hw_startup(struct fsi_priv *fsi,
 			  int is_play,
 			  struct device *dev)
 {
+	struct fsi_master *master = fsi_get_master(fsi);
+	int fsi_ver = master->core->ver;
 	u32 flags = fsi_get_info_flags(fsi);
 	u32 data = 0;
 
@@ -920,6 +924,17 @@ static int fsi_hw_startup(struct fsi_priv *fsi,
 		fsi_reg_mask_set(fsi, OUT_SEL, DMMD, DMMD);
 	}
 
+	/*
+	 * FIXME
+	 *
+	 * FSI driver assumed that data package is in-back.
+	 * FSI2 chip can select it.
+	 */
+	if (fsi_ver >= 2) {
+		fsi_reg_write(fsi, OUT_DMAC,	(1 << 4));
+		fsi_reg_write(fsi, IN_DMAC,	(1 << 4));
+	}
+
 	/* irq clear */
 	fsi_irq_disable(fsi, is_play);
 	fsi_irq_clear_status(fsi);