[ALSA] soc - ASoC 0.13 pxa2xx DMA

This patch updates the pxa2xx I2S driver to the new API in ASoC 0.13.
Changes:-
o Added check in hw_params to detect buffer less pcms (i.e. BT <-->
codec).
o Updated structures to new API
o Removed DAI's and ac97 ops from PCM header.
o Integer hardware constraint added for periods.
Signed-off-by: Andrew Johnson <ajohnson@intrinsyc.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-pcm.c

@@ -76,13 +76,18 @@ static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct pxa2xx_runtime_data *prtd = runtime->private_data;
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct pxa2xx_pcm_dma_params *dma = rtd->cpu_dai->dma_data;
+	struct pxa2xx_pcm_dma_params *dma = rtd->dai->cpu_dai->dma_data;
 	size_t totsize = params_buffer_bytes(params);
 	size_t period = params_period_bytes(params);
 	pxa_dma_desc *dma_desc;
 	dma_addr_t dma_buff_phys, next_desc_phys;
 	int ret;
 
+	/* return if this is a bufferless transfer e.g.
+	 * codec <--> BT codec or GSM modem -- lg FIXME */
+	 if (!dma)
+	 	return 0;
+
 	/* this may get called several times by oss emulation
 	 * with different params */
 	if (prtd->params == NULL) {
@@ -227,6 +232,10 @@ static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
 	if (ret)
 		goto out;
 
+	ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+	if (ret < 0)
+		goto out;
+
 	prtd = kzalloc(sizeof(struct pxa2xx_runtime_data), GFP_KERNEL);
 	if (prtd == NULL) {
 		ret = -ENOMEM;

sound/soc/pxa/pxa2xx-pcm.h

@@ -28,21 +28,7 @@ struct pxa2xx_gpio {
 	u32 frm;
 };
 
-/* pxa2xx DAI ID's */
-#define PXA2XX_DAI_AC97_HIFI	0
-#define PXA2XX_DAI_AC97_AUX		1
-#define PXA2XX_DAI_AC97_MIC		2
-#define PXA2XX_DAI_I2S			0
-#define PXA2XX_DAI_SSP1			0
-#define PXA2XX_DAI_SSP2			1
-#define PXA2XX_DAI_SSP3			2
-
-extern struct snd_soc_cpu_dai pxa_ac97_dai[3];
-extern struct snd_soc_cpu_dai pxa_i2s_dai;
-extern struct snd_soc_cpu_dai pxa_ssp_dai[3];
-
 /* platform data */
 extern struct snd_soc_platform pxa2xx_soc_platform;
-extern struct snd_ac97_bus_ops pxa2xx_ac97_ops;
 
 #endif