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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 <[email protected]> Signed-off-by: Mark Brown <[email protected]> Signed-off-by: Jaroslav Kysela <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,278 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
||
| #include <linux/module.h> | ||
| #include <linux/dma-mapping.h> | ||
|
|
||
| #include <sound/core.h> | ||
| #include <sound/pcm.h> | ||
| #include <sound/pcm_params.h> | ||
| #include <sound/pxa2xx-lib.h> | ||
|
|
||
| #include <asm/dma.h> | ||
| #include <mach/pxa-regs.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 | | ||
| SNDRV_PCM_INFO_RESUME, | ||
| .formats = SNDRV_PCM_FMTBIT_S16_LE | | ||
| SNDRV_PCM_FMTBIT_S24_LE | | ||
| SNDRV_PCM_FMTBIT_S32_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, | ||
| }; | ||
|
|
||
| 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; | ||
| } | ||
| EXPORT_SYMBOL(__pxa2xx_pcm_hw_params); | ||
|
|
||
| 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->drcmr = 0; | ||
|
|
||
| snd_pcm_set_runtime_buffer(substream, NULL); | ||
| return 0; | ||
| } | ||
| EXPORT_SYMBOL(__pxa2xx_pcm_hw_free); | ||
|
|
||
| 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; | ||
| } | ||
| 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; | ||
| } | ||
| EXPORT_SYMBOL(pxa2xx_pcm_pointer); | ||
|
|
||
| int __pxa2xx_pcm_prepare(struct snd_pcm_substream *substream) | ||
| { | ||
| struct pxa2xx_runtime_data *prtd = substream->runtime->private_data; | ||
|
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||
| DCSR(prtd->dma_ch) &= ~DCSR_RUN; | ||
| DCSR(prtd->dma_ch) = 0; | ||
| DCMD(prtd->dma_ch) = 0; | ||
| *prtd->params->drcmr = 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; | ||
| struct pxa2xx_runtime_data *rtd = substream->runtime->private_data; | ||
| int dcsr; | ||
|
|
||
| dcsr = DCSR(dma_ch); | ||
| DCSR(dma_ch) = dcsr & ~DCSR_STOPIRQEN; | ||
|
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||
| 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); | ||
| } | ||
| } | ||
| EXPORT_SYMBOL(pxa2xx_pcm_dma_irq); | ||
|
|
||
| int __pxa2xx_pcm_open(struct snd_pcm_substream *substream) | ||
| { | ||
| struct snd_pcm_runtime *runtime = substream->runtime; | ||
| 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_constraint_step(runtime, 0, | ||
| SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32); | ||
| if (ret) | ||
| goto out; | ||
|
|
||
| ret = snd_pcm_hw_constraint_step(runtime, 0, | ||
| SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32); | ||
| if (ret) | ||
| goto out; | ||
|
|
||
| ret = snd_pcm_hw_constraint_integer(runtime, | ||
| SNDRV_PCM_HW_PARAM_PERIODS); | ||
| if (ret < 0) | ||
| 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; | ||
|
|
||
| runtime->private_data = rtd; | ||
| return 0; | ||
|
|
||
| err1: | ||
| kfree(rtd); | ||
| out: | ||
| return ret; | ||
| } | ||
| 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; | ||
| } | ||
| EXPORT_SYMBOL(__pxa2xx_pcm_close); | ||
|
|
||
| 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); | ||
| } | ||
| EXPORT_SYMBOL(pxa2xx_pcm_mmap); | ||
|
|
||
| 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; | ||
| } | ||
| EXPORT_SYMBOL(pxa2xx_pcm_preallocate_dma_buffer); | ||
|
|
||
| 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; | ||
| } | ||
| } | ||
| EXPORT_SYMBOL(pxa2xx_pcm_free_dma_buffers); | ||
|
|
||
| MODULE_AUTHOR("Nicolas Pitre"); | ||
| MODULE_DESCRIPTION("Intel PXA2xx sound library"); | ||
| MODULE_LICENSE("GPL"); |
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