#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
+#include <linux/dma/pxa-dma.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pxa2xx-lib.h>
#include <sound/dmaengine_pcm.h>
-#include <mach/dma.h>
-
#include "pxa2xx-pcm.h"
static const struct snd_pcm_hardware pxa2xx_pcm_hardware = {
.period_bytes_min = 32,
.period_bytes_max = 8192 - 32,
.periods_min = 1,
- .periods_max = PAGE_SIZE/sizeof(pxa_dma_desc),
+ .periods_max = 256,
.buffer_bytes_max = 128 * 1024,
.fifo_size = 32,
};
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;
- u32 dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG;
+ struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_dmaengine_dai_dma_data *dma_params;
+ struct dma_slave_config config;
+ int ret;
- /* temporary transition hack */
- switch (rtd->params->addr_width) {
- case DMA_SLAVE_BUSWIDTH_1_BYTE:
- dcmd |= DCMD_WIDTH1;
- break;
- case DMA_SLAVE_BUSWIDTH_2_BYTES:
- dcmd |= DCMD_WIDTH2;
- break;
- case DMA_SLAVE_BUSWIDTH_4_BYTES:
- dcmd |= DCMD_WIDTH4;
- break;
- default:
- /* can't happen */
- break;
- }
+ dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+ if (!dma_params)
+ return 0;
- switch (rtd->params->maxburst) {
- case 8:
- dcmd |= DCMD_BURST8;
- break;
- case 16:
- dcmd |= DCMD_BURST16;
- break;
- case 32:
- dcmd |= DCMD_BURST32;
- break;
- }
+ ret = snd_hwparams_to_dma_slave_config(substream, params, &config);
+ if (ret)
+ return ret;
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
- runtime->dma_bytes = totsize;
+ snd_dmaengine_pcm_set_config_from_dai_data(substream,
+ snd_soc_dai_get_dma_data(rtd->cpu_dai, substream),
+ &config);
- 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->addr;
- } else {
- dma_desc->dsadr = rtd->params->addr;
- dma_desc->dtadr = dma_buff_phys;
- }
- if (period > totsize)
- period = totsize;
- dma_desc->dcmd = dcmd | period | DCMD_ENDIRQEN;
- dma_desc++;
- dma_buff_phys += period;
- } while (totsize -= period);
- dma_desc[-1].ddadr = rtd->dma_desc_array_phys;
+ ret = dmaengine_slave_config(chan, &config);
+ if (ret)
+ return ret;
+
+ snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
return 0;
}
int __pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
{
- struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
-
- if (rtd && rtd->params && rtd->params->filter_data) {
- unsigned long req = *(unsigned long *) rtd->params->filter_data;
- DRCMR(req) = 0;
- }
-
snd_pcm_set_runtime_buffer(substream, NULL);
return 0;
}
int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
- struct pxa2xx_runtime_data *prtd = substream->runtime->private_data;
- int ret = 0;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- DDADR(prtd->dma_ch) = prtd->dma_desc_array_phys;
- DCSR(prtd->dma_ch) = DCSR_RUN;
- break;
-
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- DCSR(prtd->dma_ch) &= ~DCSR_RUN;
- break;
-
- case SNDRV_PCM_TRIGGER_RESUME:
- DCSR(prtd->dma_ch) |= DCSR_RUN;
- break;
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- DDADR(prtd->dma_ch) = prtd->dma_desc_array_phys;
- DCSR(prtd->dma_ch) |= DCSR_RUN;
- break;
-
- default:
- ret = -EINVAL;
- }
-
- return ret;
+ return snd_dmaengine_pcm_trigger(substream, cmd);
}
EXPORT_SYMBOL(pxa2xx_pcm_trigger);
snd_pcm_uframes_t
pxa2xx_pcm_pointer(struct snd_pcm_substream *substream)
{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct pxa2xx_runtime_data *prtd = runtime->private_data;
-
- dma_addr_t ptr = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
- DSADR(prtd->dma_ch) : DTADR(prtd->dma_ch);
- snd_pcm_uframes_t x = bytes_to_frames(runtime, ptr - runtime->dma_addr);
-
- if (x == runtime->buffer_size)
- x = 0;
- return x;
+ return snd_dmaengine_pcm_pointer(substream);
}
EXPORT_SYMBOL(pxa2xx_pcm_pointer);
int __pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
{
- struct pxa2xx_runtime_data *prtd = substream->runtime->private_data;
- unsigned long req;
-
- if (!prtd || !prtd->params)
- return 0;
-
- if (prtd->dma_ch == -1)
- return -EINVAL;
-
- DCSR(prtd->dma_ch) &= ~DCSR_RUN;
- DCSR(prtd->dma_ch) = 0;
- DCMD(prtd->dma_ch) = 0;
- req = *(unsigned long *) prtd->params->filter_data;
- DRCMR(req) = prtd->dma_ch | DRCMR_MAPVLD;
-
return 0;
}
EXPORT_SYMBOL(__pxa2xx_pcm_prepare);
-void pxa2xx_pcm_dma_irq(int dma_ch, void *dev_id)
-{
- struct snd_pcm_substream *substream = dev_id;
- 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 "DMA error on channel %d (DCSR=%#x)\n",
- dma_ch, dcsr);
- snd_pcm_stop_xrun(substream);
- }
-}
-EXPORT_SYMBOL(pxa2xx_pcm_dma_irq);
-
int __pxa2xx_pcm_open(struct snd_pcm_substream *substream)
{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
- struct pxa2xx_runtime_data *rtd;
+ struct snd_dmaengine_dai_dma_data *dma_params;
int ret;
runtime->hw = pxa2xx_pcm_hardware;
+ dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+ if (!dma_params)
+ return 0;
+
/*
* For mysterious reasons (and despite what the manual says)
* playback samples are lost if the DMA count is not a multiple
ret = snd_pcm_hw_constraint_step(runtime, 0,
SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
if (ret)
- goto out;
+ return ret;
ret = snd_pcm_hw_constraint_step(runtime, 0,
SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
if (ret)
- goto out;
+ return ret;
ret = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0)
- goto out;
-
- ret = -ENOMEM;
- rtd = kzalloc(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;
+ return ret;
- rtd->dma_ch = -1;
- runtime->private_data = rtd;
- return 0;
-
- err1:
- kfree(rtd);
- out:
- return ret;
+ return snd_dmaengine_pcm_open_request_chan(substream,
+ pxad_filter_fn,
+ dma_params->filter_data);
}
EXPORT_SYMBOL(__pxa2xx_pcm_open);
int __pxa2xx_pcm_close(struct snd_pcm_substream *substream)
{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct pxa2xx_runtime_data *rtd = runtime->private_data;
-
- dma_free_writecombine(substream->pcm->card->dev, PAGE_SIZE,
- rtd->dma_desc_array, rtd->dma_desc_array_phys);
- kfree(rtd);
- return 0;
+ return snd_dmaengine_pcm_close_release_chan(substream);
}
EXPORT_SYMBOL(__pxa2xx_pcm_close);
Code Review / kvmfornfv.git / blobdiff