* 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;
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;
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;
}
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,
git.samba.org / sfrench / cifs-2.6.git / blobdiff