ASoC: use set_channel_map api to reorder channels for AD1938 and AD1836

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/blackfin/bf5xx-ad1836.c

@@ -52,6 +52,7 @@ static int bf5xx_ad1836_hw_params(struct snd_pcm_substream *substream,
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 	struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
+	unsigned int channel_map[] = {0, 4, 1, 5, 2, 6, 3, 7};
 	int ret = 0;
 	/* set cpu DAI configuration */
 	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_A |
@@ -65,6 +66,12 @@ static int bf5xx_ad1836_hw_params(struct snd_pcm_substream *substream,
 	if (ret < 0)
 		return ret;
 
+	/* set cpu DAI channel mapping */
+	ret = snd_soc_dai_set_channel_map(cpu_dai, ARRAY_SIZE(channel_map),
+		channel_map, ARRAY_SIZE(channel_map), channel_map);
+	if (ret < 0)
+		return ret;
+
 	return 0;
 }
 

sound/soc/blackfin/bf5xx-ad1938.c

@@ -61,6 +61,7 @@ static int bf5xx_ad1938_hw_params(struct snd_pcm_substream *substream,
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 	struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
+	unsigned int channel_map[] = {0, 1, 2, 3, 4, 5, 6, 7};
 	int ret = 0;
 	/* set cpu DAI configuration */
 	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_A |
@@ -75,7 +76,13 @@ static int bf5xx_ad1938_hw_params(struct snd_pcm_substream *substream,
 		return ret;
 
 	/* set codec DAI slots, 8 channels, all channels are enabled */
-	ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xFF, 8);
+	ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xFF, 0xFF, 8, 32);
+	if (ret < 0)
+		return ret;
+
+	/* set cpu DAI channel mapping */
+	ret = snd_soc_dai_set_channel_map(cpu_dai, ARRAY_SIZE(channel_map),
+		channel_map, ARRAY_SIZE(channel_map), channel_map);
 	if (ret < 0)
 		return ret;
 

sound/soc/blackfin/bf5xx-tdm-pcm.c

@@ -43,7 +43,7 @@
 #include "bf5xx-tdm.h"
 #include "bf5xx-sport.h"
 
-#define PCM_BUFFER_MAX  0x10000
+#define PCM_BUFFER_MAX  0x8000
 #define FRAGMENT_SIZE_MIN  (4*1024)
 #define FRAGMENTS_MIN  2
 #define FRAGMENTS_MAX  32
@@ -177,6 +177,9 @@ out:
 static int bf5xx_pcm_copy(struct snd_pcm_substream *substream, int channel,
 	snd_pcm_uframes_t pos, void *buf, snd_pcm_uframes_t count)
 {
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct sport_device *sport = runtime->private_data;
+	struct bf5xx_tdm_port *tdm_port = sport->private_data;
 	unsigned int *src;
 	unsigned int *dst;
 	int i;
@@ -188,7 +191,7 @@ static int bf5xx_pcm_copy(struct snd_pcm_substream *substream, int channel,
 		dst += pos * 8;
 		while (count--) {
 			for (i = 0; i < substream->runtime->channels; i++)
-				*(dst + i) = *src++;
+				*(dst + tdm_port->tx_map[i]) = *src++;
 			dst += 8;
 		}
 	} else {
@@ -198,7 +201,7 @@ static int bf5xx_pcm_copy(struct snd_pcm_substream *substream, int channel,
 		src += pos * 8;
 		while (count--) {
 			for (i = 0; i < substream->runtime->channels; i++)
-				*dst++ = *(src+i);
+				*dst++ = *(src + tdm_port->rx_map[i]);
 			src += 8;
 		}
 	}

sound/soc/blackfin/bf5xx-tdm.c

@@ -46,14 +46,6 @@
 #include "bf5xx-sport.h"
 #include "bf5xx-tdm.h"
 
-struct bf5xx_tdm_port {
-	u16 tcr1;
-	u16 rcr1;
-	u16 tcr2;
-	u16 rcr2;
-	int configured;
-};
-
 static struct bf5xx_tdm_port bf5xx_tdm;
 static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
 
@@ -181,6 +173,40 @@ static void bf5xx_tdm_shutdown(struct snd_pcm_substream *substream,
 		bf5xx_tdm.configured = 0;
 }
 
+static int bf5xx_tdm_set_channel_map(struct snd_soc_dai *dai,
+		unsigned int tx_num, unsigned int *tx_slot,
+		unsigned int rx_num, unsigned int *rx_slot)
+{
+	int i;
+	unsigned int slot;
+	unsigned int tx_mapped = 0, rx_mapped = 0;
+
+	if ((tx_num > BFIN_TDM_DAI_MAX_SLOTS) ||
+			(rx_num > BFIN_TDM_DAI_MAX_SLOTS))
+		return -EINVAL;
+
+	for (i = 0; i < tx_num; i++) {
+		slot = tx_slot[i];
+		if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
+				(!(tx_mapped & (1 << slot)))) {
+			bf5xx_tdm.tx_map[i] = slot;
+			tx_mapped |= 1 << slot;
+		} else
+			return -EINVAL;
+	}
+	for (i = 0; i < rx_num; i++) {
+		slot = rx_slot[i];
+		if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
+				(!(rx_mapped & (1 << slot)))) {
+			bf5xx_tdm.rx_map[i] = slot;
+			rx_mapped |= 1 << slot;
+		} else
+			return -EINVAL;
+	}
+
+	return 0;
+}
+
 #ifdef CONFIG_PM
 static int bf5xx_tdm_suspend(struct snd_soc_dai *dai)
 {
@@ -235,6 +261,7 @@ static struct snd_soc_dai_ops bf5xx_tdm_dai_ops = {
 	.hw_params      = bf5xx_tdm_hw_params,
 	.set_fmt        = bf5xx_tdm_set_dai_fmt,
 	.shutdown       = bf5xx_tdm_shutdown,
+	.set_channel_map   = bf5xx_tdm_set_channel_map,
 };
 
 struct snd_soc_dai bf5xx_tdm_dai = {
@@ -300,6 +327,8 @@ static int __devinit bfin_tdm_probe(struct platform_device *pdev)
 		pr_err("Failed to register DAI: %d\n", ret);
 		goto sport_config_err;
 	}
+
+	sport_handle->private_data = &bf5xx_tdm;
 	return 0;
 
 sport_config_err:

sound/soc/blackfin/bf5xx-tdm.h

@@ -9,6 +9,17 @@
 #ifndef _BF5XX_TDM_H
 #define _BF5XX_TDM_H
 
+#define BFIN_TDM_DAI_MAX_SLOTS 8
+struct bf5xx_tdm_port {
+	u16 tcr1;
+	u16 rcr1;
+	u16 tcr2;
+	u16 rcr2;
+	unsigned int tx_map[BFIN_TDM_DAI_MAX_SLOTS];
+	unsigned int rx_map[BFIN_TDM_DAI_MAX_SLOTS];
+	int configured;
+};
+
 extern struct snd_soc_dai bf5xx_tdm_dai;
 
 #endif