ALSA: Separate common pxa2xx-pcm code

ASoC and non-ASoC drivers for PCM DMA on PXA share lots of common code.
Move it to pxa2xx-lib.

[Fixed some checkpatch warnings -- broonie]

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 8 insertions, 244 deletions

diff --git a/sound/arm/pxa2xx-pcm.c b/sound/arm/pxa2xx-pcm.c
index 381094a..535704f 100644
--- a/sound/arm/pxa2xx-pcm.c
+++ b/sound/arm/pxa2xx-pcm.c
@@ -10,183 +10,20 @@
  * published by the Free Software Foundation.
  */
 
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/slab.h>
-#include <linux/dma-mapping.h>
-
 #include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-
-#include <asm/dma.h>
-#include <mach/hardware.h>
-#include <mach/pxa-regs.h>
+#include <sound/pxa2xx-lib.h>
 
 #include "pxa2xx-pcm.h"
 
-
-static const struct snd_pcm_hardware pxa2xx_pcm_hardware = {
-	.info			= SNDRV_PCM_INFO_MMAP |
-				  SNDRV_PCM_INFO_MMAP_VALID |
-				  SNDRV_PCM_INFO_INTERLEAVED |
-				  SNDRV_PCM_INFO_PAUSE,
-	.formats		= SNDRV_PCM_FMTBIT_S16_LE,
-	.period_bytes_min	= 32,
-	.period_bytes_max	= 8192 - 32,
-	.periods_min		= 1,
-	.periods_max		= PAGE_SIZE/sizeof(pxa_dma_desc),
-	.buffer_bytes_max	= 128 * 1024,
-	.fifo_size		= 32,
-};
-
-struct pxa2xx_runtime_data {
-	int dma_ch;
-	struct pxa2xx_pcm_dma_params *params;
-	pxa_dma_desc *dma_desc_array;
-	dma_addr_t dma_desc_array_phys;
-};
-
-static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
-				struct snd_pcm_hw_params *params)
-{
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	struct pxa2xx_runtime_data *rtd = runtime->private_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;
-
-	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
-	runtime->dma_bytes = totsize;
-
-	dma_desc = rtd->dma_desc_array;
-	next_desc_phys = rtd->dma_desc_array_phys;
-	dma_buff_phys = runtime->dma_addr;
-	do {
-		next_desc_phys += sizeof(pxa_dma_desc);
-		dma_desc->ddadr = next_desc_phys;
-		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-			dma_desc->dsadr = dma_buff_phys;
-			dma_desc->dtadr = rtd->params->dev_addr;
-		} else {
-			dma_desc->dsadr = rtd->params->dev_addr;
-			dma_desc->dtadr = dma_buff_phys;
-		}
-		if (period > totsize)
-			period = totsize;
-		dma_desc->dcmd = rtd->params->dcmd | period | DCMD_ENDIRQEN;
-		dma_desc++;
-		dma_buff_phys += period;
-	} while (totsize -= period);
-	dma_desc[-1].ddadr = rtd->dma_desc_array_phys;
-
-	return 0;
-}
-
-static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
-{
-	struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
-
-	*rtd->params->drcmr = 0;
-	snd_pcm_set_runtime_buffer(substream, NULL);
-	return 0;
-}
-
 static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
 {
 	struct pxa2xx_pcm_client *client = substream->private_data;
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	struct pxa2xx_runtime_data *rtd = runtime->private_data;
 
-	DCSR(rtd->dma_ch) &= ~DCSR_RUN;
-	DCSR(rtd->dma_ch) = 0;
-	DCMD(rtd->dma_ch) = 0;
-	*rtd->params->drcmr = rtd->dma_ch | DRCMR_MAPVLD;
+	__pxa2xx_pcm_prepare(substream);
 
 	return client->prepare(substream);
 }
 
-static int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
-{
-	struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
-	int ret = 0;
-
-	switch (cmd) {
-	case SNDRV_PCM_TRIGGER_START:
-		DDADR(rtd->dma_ch) = rtd->dma_desc_array_phys;
-		DCSR(rtd->dma_ch) = DCSR_RUN;
-		break;
-
-	case SNDRV_PCM_TRIGGER_STOP:
-	case SNDRV_PCM_TRIGGER_SUSPEND:
-	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
-		DCSR(rtd->dma_ch) &= ~DCSR_RUN;
-		break;
-
-	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
-		DCSR(rtd->dma_ch) |= DCSR_RUN;
-		break;
-
-	default:
-		ret = -EINVAL;
-	}
-
-	return ret;
-}
-
-static void pxa2xx_pcm_dma_irq(int dma_ch, void *dev_id)
-{
-	struct snd_pcm_substream *substream = dev_id;
-	struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
-	int dcsr;
-
-	dcsr = DCSR(dma_ch);
-	DCSR(dma_ch) = dcsr & ~DCSR_STOPIRQEN;
-
-	if (dcsr & DCSR_ENDINTR) {
-		snd_pcm_period_elapsed(substream);
-	} else {
-		printk( KERN_ERR "%s: DMA error on channel %d (DCSR=%#x)\n",
-			rtd->params->name, dma_ch, dcsr );
-		snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
-	}
-}
-
-static snd_pcm_uframes_t pxa2xx_pcm_pointer(struct snd_pcm_substream *substream)
-{
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	struct pxa2xx_runtime_data *rtd = runtime->private_data;
-	dma_addr_t ptr = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
-			 DSADR(rtd->dma_ch) : DTADR(rtd->dma_ch);
-	snd_pcm_uframes_t x = bytes_to_frames(runtime, ptr - runtime->dma_addr);
-	if (x == runtime->buffer_size)
-		x = 0;
-	return x;
-}
-
-static int
-pxa2xx_pcm_hw_rule_mult32(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
-{
-	struct snd_interval *i = hw_param_interval(params, rule->var);
-	int changed = 0;
-
-	if (i->min & 31) {
-		i->min = (i->min & ~31) + 32;
-		i->openmin = 0;
-		changed = 1;
-	}
-
-	if (i->max & 31) {
-		i->max &= ~31;
-		i->openmax = 0;
-		changed = 1;
-	}
-
-	return changed;
-}
-
 static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
 {
 	struct pxa2xx_pcm_client *client = substream->private_data;
@@ -194,33 +31,11 @@ static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
 	struct pxa2xx_runtime_data *rtd;
 	int ret;
 
-	runtime->hw = pxa2xx_pcm_hardware;
-
-	/*
-	 * For mysterious reasons (and despite what the manual says)
-	 * playback samples are lost if the DMA count is not a multiple
-	 * of the DMA burst size.  Let's add a rule to enforce that.
-	 */
-	ret = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
-				  pxa2xx_pcm_hw_rule_mult32, NULL,
-				  SNDRV_PCM_HW_PARAM_PERIOD_BYTES, -1);
-	if (ret)
-		goto out;
-	ret = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
-				  pxa2xx_pcm_hw_rule_mult32, NULL,
-				  SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
+	ret = __pxa2xx_pcm_open(substream);
 	if (ret)
 		goto out;
 
-	ret = -ENOMEM;
-	rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
-	if (!rtd)
-		goto out;
-	rtd->dma_desc_array =
-		dma_alloc_writecombine(substream->pcm->card->dev, PAGE_SIZE,
-				       &rtd->dma_desc_array_phys, GFP_KERNEL);
-	if (!rtd->dma_desc_array)
-		goto err1;
+	rtd = runtime->private_data;
 
 	rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 		      client->playback_params : client->capture_params;
@@ -230,17 +45,13 @@ static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
 		goto err2;
 	rtd->dma_ch = ret;
 
-	runtime->private_data = rtd;
 	ret = client->startup(substream);
 	if (!ret)
 		goto out;
 
 	pxa_free_dma(rtd->dma_ch);
  err2:
-	dma_free_writecombine(substream->pcm->card->dev, PAGE_SIZE,
-			      rtd->dma_desc_array, rtd->dma_desc_array_phys);
- err1:
-	kfree(rtd);
+	__pxa2xx_pcm_close(substream);
  out:
 	return ret;
 }
@@ -252,69 +63,22 @@ static int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
 
 	pxa_free_dma(rtd->dma_ch);
 	client->shutdown(substream);
-	dma_free_writecombine(substream->pcm->card->dev, PAGE_SIZE,
-			      rtd->dma_desc_array, rtd->dma_desc_array_phys);
-	kfree(rtd);
-	return 0;
-}
 
-static int
-pxa2xx_pcm_mmap(struct snd_pcm_substream *substream, struct vm_area_struct *vma)
-{
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	return dma_mmap_writecombine(substream->pcm->card->dev, vma,
-				     runtime->dma_area,
-				     runtime->dma_addr,
-				     runtime->dma_bytes);
+	return __pxa2xx_pcm_close(substream);
 }
 
 static struct snd_pcm_ops pxa2xx_pcm_ops = {
 	.open		= pxa2xx_pcm_open,
 	.close		= pxa2xx_pcm_close,
 	.ioctl		= snd_pcm_lib_ioctl,
-	.hw_params	= pxa2xx_pcm_hw_params,
-	.hw_free	= pxa2xx_pcm_hw_free,
+	.hw_params	= __pxa2xx_pcm_hw_params,
+	.hw_free	= __pxa2xx_pcm_hw_free,
 	.prepare	= pxa2xx_pcm_prepare,
 	.trigger	= pxa2xx_pcm_trigger,
 	.pointer	= pxa2xx_pcm_pointer,
 	.mmap		= pxa2xx_pcm_mmap,
 };
 
-static int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
-{
-	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
-	struct snd_dma_buffer *buf = &substream->dma_buffer;
-	size_t size = pxa2xx_pcm_hardware.buffer_bytes_max;
-	buf->dev.type = SNDRV_DMA_TYPE_DEV;
-	buf->dev.dev = pcm->card->dev;
-	buf->private_data = NULL;
-	buf->area = dma_alloc_writecombine(pcm->card->dev, size,
-					   &buf->addr, GFP_KERNEL);
-	if (!buf->area)
-		return -ENOMEM;
-	buf->bytes = size;
-	return 0;
-}
-
-static void pxa2xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
-{
-	struct snd_pcm_substream *substream;
-	struct snd_dma_buffer *buf;
-	int stream;
-
-	for (stream = 0; stream < 2; stream++) {
-		substream = pcm->streams[stream].substream;
-		if (!substream)
-			continue;
-		buf = &substream->dma_buffer;
-		if (!buf->area)
-			continue;
-		dma_free_writecombine(pcm->card->dev, buf->bytes,
-				      buf->area, buf->addr);
-		buf->area = NULL;
-	}
-}
-
 static u64 pxa2xx_pcm_dmamask = 0xffffffff;
 
 int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client,