[ALSA] soc - ASoC 0.13 pxa2xx i2s driver

This patch updates the pxa2xx I2S driver to the new API in ASoC 0.13.
Changes:-
o Removed DAI capabilities matching code in favour of manual matching in
the machine drivers.
o Added DAI operations for codec and CPU interfaces.
o Removed config_sysclk() function and struct snd_soc_clock_info. No
longer needed as clocking is now configured manually in the machine
drivers. Also removed other clocking data from structures.
o Added pxa2xx-i2s.h header

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/soc/pxa/pxa2xx-i2s.c

@@ -29,11 +29,7 @@
 #include <asm/arch/audio.h>
 
 #include "pxa2xx-pcm.h"
-
-/* used to disable sysclk if external crystal is used */
-static int extclk;
-module_param(extclk, int, 0);
-MODULE_PARM_DESC(extclk, "set to 1 to disable pxa2xx i2s sysclk");
+#include "pxa2xx-i2s.h"
 
 struct pxa_i2s_port {
 	u32 sadiv;
@@ -41,97 +37,10 @@ struct pxa_i2s_port {
 	u32 sacr1;
 	u32 saimr;
 	int master;
+	u32 fmt;
 };
 static struct pxa_i2s_port pxa_i2s;
 
-#define PXA_I2S_DAIFMT \
-	(SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF)
-
-#define PXA_I2S_DIR \
-	(SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
-
-#define PXA_I2S_RATES \
-	(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
-	SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
-	SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
-
-/* priv is divider */
-static struct snd_soc_dai_mode pxa2xx_i2s_modes[] = {
-	/* pxa2xx I2S frame and clock master modes */
-	{
-		.fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS,
-		.pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
-		.pcmrate = SNDRV_PCM_RATE_8000,
-		.pcmdir = PXA_I2S_DIR,
-		.flags = SND_SOC_DAI_BFS_DIV,
-		.fs = 256,
-		.bfs = SND_SOC_FSBD(4),
-		.priv = 0x48,
-	},
-	{
-		.fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS,
-		.pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
-		.pcmrate = SNDRV_PCM_RATE_11025,
-		.pcmdir = PXA_I2S_DIR,
-		.flags = SND_SOC_DAI_BFS_DIV,
-		.fs = 256,
-		.bfs = SND_SOC_FSBD(4),
-		.priv = 0x34,
-	},
-	{
-		.fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS,
-		.pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
-		.pcmrate = SNDRV_PCM_RATE_16000,
-		.pcmdir = PXA_I2S_DIR,
-		.flags = SND_SOC_DAI_BFS_DIV,
-		.fs = 256,
-		.bfs = SND_SOC_FSBD(4),
-		.priv = 0x24,
-	},
-	{
-		.fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS,
-		.pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
-		.pcmrate = SNDRV_PCM_RATE_22050,
-		.pcmdir = PXA_I2S_DIR,
-		.flags = SND_SOC_DAI_BFS_DIV,
-		.fs = 256,
-		.bfs = SND_SOC_FSBD(4),
-		.priv = 0x1a,
-	},
-	{
-		.fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS,
-		.pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
-		.pcmrate = SNDRV_PCM_RATE_44100,
-		.pcmdir = PXA_I2S_DIR,
-		.flags = SND_SOC_DAI_BFS_DIV,
-		.fs = 256,
-		.bfs = SND_SOC_FSBD(4),
-		.priv = 0xd,
-	},
-	{
-		.fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS,
-		.pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
-		.pcmrate = SNDRV_PCM_RATE_48000,
-		.pcmdir = PXA_I2S_DIR,
-		.flags = SND_SOC_DAI_BFS_DIV,
-		.fs = 256,
-		.bfs = SND_SOC_FSBD(4),
-		.priv = 0xc,
-	},
-
-	/* pxa2xx I2S frame master and clock slave mode */
-	{
-		.fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBM_CFS,
-		.pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
-		.pcmrate = PXA_I2S_RATES,
-		.pcmdir = PXA_I2S_DIR,
-		.fs = SND_SOC_FS_ALL,
-		.flags = SND_SOC_DAI_BFS_RATE,
-		.bfs = 64,
-		.priv = 0x48,
-	},
-};
-
 static struct pxa2xx_pcm_dma_params pxa2xx_i2s_pcm_stereo_out = {
 	.name			= "I2S PCM Stereo out",
 	.dev_addr		= __PREG(SADR),
@@ -171,8 +80,9 @@ static struct pxa2xx_gpio gpio_bus[] = {
 static int pxa2xx_i2s_startup(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
 
-	if (!rtd->cpu_dai->active) {
+	if (!cpu_dai->active) {
 		SACR0 |= SACR0_RST;
 		SACR0 = 0;
 	}
@@ -191,18 +101,50 @@ static int pxa_i2s_wait(void)
 	return 0;
 }
 
-static int pxa2xx_i2s_hw_params(struct snd_pcm_substream *substream,
-				struct snd_pcm_hw_params *params)
+static int pxa2xx_i2s_set_dai_fmt(struct snd_soc_cpu_dai *cpu_dai,
+		unsigned int fmt)
 {
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	/* interface format */
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		pxa_i2s.fmt = 0;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		pxa_i2s.fmt = SACR1_AMSL;
+		break;
+	}
 
-	pxa_i2s.master = 0;
-	if (rtd->cpu_dai->dai_runtime.fmt & SND_SOC_DAIFMT_CBS_CFS)
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBS_CFS:
 		pxa_i2s.master = 1;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFS:
+		pxa_i2s.master = 0;
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
 
-	if (pxa_i2s.master && !extclk)
+static int pxa2xx_i2s_set_dai_sysclk(struct snd_soc_cpu_dai *cpu_dai,
+		int clk_id, unsigned int freq, int dir)
+{
+	if (clk_id != PXA2XX_I2S_SYSCLK)
+		return -ENODEV;
+
+	if (pxa_i2s.master && dir == SND_SOC_CLOCK_OUT)
 		pxa_gpio_mode(gpio_bus[pxa_i2s.master].sys);
 
+	return 0;
+}
+
+static int pxa2xx_i2s_hw_params(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
+
 	pxa_gpio_mode(gpio_bus[pxa_i2s.master].rx);
 	pxa_gpio_mode(gpio_bus[pxa_i2s.master].tx);
 	pxa_gpio_mode(gpio_bus[pxa_i2s.master].frm);
@@ -211,9 +153,9 @@ static int pxa2xx_i2s_hw_params(struct snd_pcm_substream *substream,
 	pxa_i2s_wait();
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-		rtd->cpu_dai->dma_data = &pxa2xx_i2s_pcm_stereo_out;
+		cpu_dai->dma_data = &pxa2xx_i2s_pcm_stereo_out;
 	else
-		rtd->cpu_dai->dma_data = &pxa2xx_i2s_pcm_stereo_in;
+		cpu_dai->dma_data = &pxa2xx_i2s_pcm_stereo_in;
 
 	/* is port used by another stream */
 	if (!(SACR0 & SACR0_ENB)) {
@@ -224,16 +166,37 @@ static int pxa2xx_i2s_hw_params(struct snd_pcm_substream *substream,
 			SACR0 |= SACR0_BCKD;
 
 		SACR0 |= SACR0_RFTH(14) | SACR0_TFTH(1);
-
-		if (rtd->cpu_dai->dai_runtime.fmt & SND_SOC_DAIFMT_LEFT_J)
-			SACR1 |= SACR1_AMSL;
+		SACR1 |= pxa_i2s.fmt;
 	}
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 		SAIMR |= SAIMR_TFS;
 	else
 		SAIMR |= SAIMR_RFS;
 
-	SADIV = rtd->cpu_dai->dai_runtime.priv;
+	switch (params_rate(params)) {
+	case 8000:
+		SADIV = 0x48;
+		break;
+	case 11025:
+		SADIV = 0x34;
+		break;
+	case 16000:
+		SADIV = 0x24;
+		break;
+	case 22050:
+		SADIV = 0x1a;
+		break;
+	case 44100:
+		SADIV = 0xd;
+		break;
+	case 48000:
+		SADIV = 0xc;
+		break;
+	case 96000: /* not in manual and possibly slightly inaccurate */
+		SADIV = 0x6;
+		break;
+	}
+
 	return 0;
 }
 
@@ -316,12 +279,9 @@ static int pxa2xx_i2s_resume(struct platform_device *pdev,
 #define pxa2xx_i2s_resume	NULL
 #endif
 
-/* pxa2xx I2S sysclock is always 256 FS */
-static unsigned int pxa_i2s_config_sysclk(struct snd_soc_cpu_dai *iface,
-	struct snd_soc_clock_info *info, unsigned int clk)
-{
-	return info->rate << 8;
-}
+#define PXA2XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
+		SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
+		SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000)
 
 struct snd_soc_cpu_dai pxa_i2s_dai = {
 	.name = "pxa2xx-i2s",
@@ -329,21 +289,25 @@ struct snd_soc_cpu_dai pxa_i2s_dai = {
 	.type = SND_SOC_DAI_I2S,
 	.suspend = pxa2xx_i2s_suspend,
 	.resume = pxa2xx_i2s_resume,
-	.config_sysclk = pxa_i2s_config_sysclk,
 	.playback = {
 		.channels_min = 2,
-		.channels_max = 2,},
+		.channels_max = 2,
+		.rates = PXA2XX_I2S_RATES,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
 	.capture = {
 		.channels_min = 2,
-		.channels_max = 2,},
+		.channels_max = 2,
+		.rates = PXA2XX_I2S_RATES,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
 	.ops = {
 		.startup = pxa2xx_i2s_startup,
 		.shutdown = pxa2xx_i2s_shutdown,
 		.trigger = pxa2xx_i2s_trigger,
 		.hw_params = pxa2xx_i2s_hw_params,},
-	.caps = {
-		.num_modes = ARRAY_SIZE(pxa2xx_i2s_modes),
-		.mode = pxa2xx_i2s_modes,},
+	.dai_ops = {
+		.set_fmt = pxa2xx_i2s_set_dai_fmt,
+		.set_sysclk = pxa2xx_i2s_set_dai_sysclk,
+	},
 };
 
 EXPORT_SYMBOL_GPL(pxa_i2s_dai);

sound/soc/pxa/pxa2xx-i2s.h

@@ -0,0 +1,20 @@
+/*
+ * linux/sound/arm/pxa2xx-i2s.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _PXA2XX_I2S_H
+#define _PXA2XX_I2S_H
+
+/* pxa2xx DAI ID's */
+#define PXA2XX_DAI_I2S			0
+
+/* I2S clock */
+#define PXA2XX_I2S_SYSCLK		0
+
+extern struct snd_soc_cpu_dai pxa_i2s_dai;
+
+#endif