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>tirimbino
Dmitry Baryshkov
17 years ago
committed by
Jaroslav Kysela
parent
9d1cf39be6
commit
a6d7731767
@ -0,0 +1,278 @@ |
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/*
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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*/ |
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#include <linux/module.h> |
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#include <linux/dma-mapping.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/pxa2xx-lib.h> |
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#include <asm/dma.h> |
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#include <mach/pxa-regs.h> |
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#include "pxa2xx-pcm.h" |
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static const struct snd_pcm_hardware pxa2xx_pcm_hardware = { |
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.info = SNDRV_PCM_INFO_MMAP | |
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SNDRV_PCM_INFO_MMAP_VALID | |
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SNDRV_PCM_INFO_INTERLEAVED | |
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SNDRV_PCM_INFO_PAUSE | |
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SNDRV_PCM_INFO_RESUME, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE | |
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SNDRV_PCM_FMTBIT_S24_LE | |
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SNDRV_PCM_FMTBIT_S32_LE, |
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.period_bytes_min = 32, |
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.period_bytes_max = 8192 - 32, |
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.periods_min = 1, |
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.periods_max = PAGE_SIZE/sizeof(pxa_dma_desc), |
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.buffer_bytes_max = 128 * 1024, |
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.fifo_size = 32, |
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}; |
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int __pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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struct pxa2xx_runtime_data *rtd = runtime->private_data; |
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size_t totsize = params_buffer_bytes(params); |
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size_t period = params_period_bytes(params); |
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pxa_dma_desc *dma_desc; |
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dma_addr_t dma_buff_phys, next_desc_phys; |
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snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); |
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runtime->dma_bytes = totsize; |
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dma_desc = rtd->dma_desc_array; |
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next_desc_phys = rtd->dma_desc_array_phys; |
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dma_buff_phys = runtime->dma_addr; |
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do { |
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next_desc_phys += sizeof(pxa_dma_desc); |
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dma_desc->ddadr = next_desc_phys; |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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dma_desc->dsadr = dma_buff_phys; |
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dma_desc->dtadr = rtd->params->dev_addr; |
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} else { |
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dma_desc->dsadr = rtd->params->dev_addr; |
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dma_desc->dtadr = dma_buff_phys; |
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} |
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if (period > totsize) |
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period = totsize; |
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dma_desc->dcmd = rtd->params->dcmd | period | DCMD_ENDIRQEN; |
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dma_desc++; |
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dma_buff_phys += period; |
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} while (totsize -= period); |
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dma_desc[-1].ddadr = rtd->dma_desc_array_phys; |
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return 0; |
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} |
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EXPORT_SYMBOL(__pxa2xx_pcm_hw_params); |
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int __pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream) |
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{ |
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struct pxa2xx_runtime_data *rtd = substream->runtime->private_data; |
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if (rtd && rtd->params) |
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*rtd->params->drcmr = 0; |
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snd_pcm_set_runtime_buffer(substream, NULL); |
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return 0; |
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} |
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EXPORT_SYMBOL(__pxa2xx_pcm_hw_free); |
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int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
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{ |
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struct pxa2xx_runtime_data *prtd = substream->runtime->private_data; |
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int ret = 0; |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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DDADR(prtd->dma_ch) = prtd->dma_desc_array_phys; |
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DCSR(prtd->dma_ch) = DCSR_RUN; |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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case SNDRV_PCM_TRIGGER_SUSPEND: |
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
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DCSR(prtd->dma_ch) &= ~DCSR_RUN; |
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break; |
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case SNDRV_PCM_TRIGGER_RESUME: |
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DCSR(prtd->dma_ch) |= DCSR_RUN; |
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break; |
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
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DDADR(prtd->dma_ch) = prtd->dma_desc_array_phys; |
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DCSR(prtd->dma_ch) |= DCSR_RUN; |
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break; |
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default: |
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ret = -EINVAL; |
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} |
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return ret; |
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} |
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EXPORT_SYMBOL(pxa2xx_pcm_trigger); |
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snd_pcm_uframes_t |
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pxa2xx_pcm_pointer(struct snd_pcm_substream *substream) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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struct pxa2xx_runtime_data *prtd = runtime->private_data; |
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dma_addr_t ptr = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? |
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DSADR(prtd->dma_ch) : DTADR(prtd->dma_ch); |
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snd_pcm_uframes_t x = bytes_to_frames(runtime, ptr - runtime->dma_addr); |
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if (x == runtime->buffer_size) |
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x = 0; |
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return x; |
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} |
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EXPORT_SYMBOL(pxa2xx_pcm_pointer); |
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int __pxa2xx_pcm_prepare(struct snd_pcm_substream *substream) |
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{ |
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struct pxa2xx_runtime_data *prtd = substream->runtime->private_data; |
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DCSR(prtd->dma_ch) &= ~DCSR_RUN; |
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DCSR(prtd->dma_ch) = 0; |
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DCMD(prtd->dma_ch) = 0; |
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*prtd->params->drcmr = prtd->dma_ch | DRCMR_MAPVLD; |
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return 0; |
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} |
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EXPORT_SYMBOL(__pxa2xx_pcm_prepare); |
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void pxa2xx_pcm_dma_irq(int dma_ch, void *dev_id) |
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{ |
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struct snd_pcm_substream *substream = dev_id; |
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struct pxa2xx_runtime_data *rtd = substream->runtime->private_data; |
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int dcsr; |
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dcsr = DCSR(dma_ch); |
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DCSR(dma_ch) = dcsr & ~DCSR_STOPIRQEN; |
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if (dcsr & DCSR_ENDINTR) { |
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snd_pcm_period_elapsed(substream); |
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} else { |
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printk(KERN_ERR "%s: DMA error on channel %d (DCSR=%#x)\n", |
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rtd->params->name, dma_ch, dcsr); |
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snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
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} |
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} |
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EXPORT_SYMBOL(pxa2xx_pcm_dma_irq); |
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int __pxa2xx_pcm_open(struct snd_pcm_substream *substream) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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struct pxa2xx_runtime_data *rtd; |
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int ret; |
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runtime->hw = pxa2xx_pcm_hardware; |
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/*
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* For mysterious reasons (and despite what the manual says) |
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* playback samples are lost if the DMA count is not a multiple |
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* of the DMA burst size. Let's add a rule to enforce that. |
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*/ |
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ret = snd_pcm_hw_constraint_step(runtime, 0, |
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SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32); |
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if (ret) |
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goto out; |
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ret = snd_pcm_hw_constraint_step(runtime, 0, |
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SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32); |
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if (ret) |
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goto out; |
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ret = snd_pcm_hw_constraint_integer(runtime, |
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SNDRV_PCM_HW_PARAM_PERIODS); |
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if (ret < 0) |
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goto out; |
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ret = -ENOMEM; |
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rtd = kmalloc(sizeof(*rtd), GFP_KERNEL); |
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if (!rtd) |
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goto out; |
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rtd->dma_desc_array = |
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dma_alloc_writecombine(substream->pcm->card->dev, PAGE_SIZE, |
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&rtd->dma_desc_array_phys, GFP_KERNEL); |
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if (!rtd->dma_desc_array) |
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goto err1; |
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runtime->private_data = rtd; |
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return 0; |
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err1: |
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kfree(rtd); |
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out: |
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return ret; |
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} |
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EXPORT_SYMBOL(__pxa2xx_pcm_open); |
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int __pxa2xx_pcm_close(struct snd_pcm_substream *substream) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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struct pxa2xx_runtime_data *rtd = runtime->private_data; |
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dma_free_writecombine(substream->pcm->card->dev, PAGE_SIZE, |
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rtd->dma_desc_array, rtd->dma_desc_array_phys); |
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kfree(rtd); |
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return 0; |
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} |
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EXPORT_SYMBOL(__pxa2xx_pcm_close); |
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int pxa2xx_pcm_mmap(struct snd_pcm_substream *substream, |
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struct vm_area_struct *vma) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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return dma_mmap_writecombine(substream->pcm->card->dev, vma, |
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runtime->dma_area, |
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runtime->dma_addr, |
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runtime->dma_bytes); |
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} |
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EXPORT_SYMBOL(pxa2xx_pcm_mmap); |
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int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream) |
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{ |
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struct snd_pcm_substream *substream = pcm->streams[stream].substream; |
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struct snd_dma_buffer *buf = &substream->dma_buffer; |
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size_t size = pxa2xx_pcm_hardware.buffer_bytes_max; |
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buf->dev.type = SNDRV_DMA_TYPE_DEV; |
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buf->dev.dev = pcm->card->dev; |
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buf->private_data = NULL; |
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buf->area = dma_alloc_writecombine(pcm->card->dev, size, |
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&buf->addr, GFP_KERNEL); |
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if (!buf->area) |
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return -ENOMEM; |
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buf->bytes = size; |
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return 0; |
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} |
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EXPORT_SYMBOL(pxa2xx_pcm_preallocate_dma_buffer); |
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void pxa2xx_pcm_free_dma_buffers(struct snd_pcm *pcm) |
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{ |
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struct snd_pcm_substream *substream; |
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struct snd_dma_buffer *buf; |
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int stream; |
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for (stream = 0; stream < 2; stream++) { |
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substream = pcm->streams[stream].substream; |
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if (!substream) |
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continue; |
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buf = &substream->dma_buffer; |
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if (!buf->area) |
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continue; |
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dma_free_writecombine(pcm->card->dev, buf->bytes, |
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buf->area, buf->addr); |
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buf->area = NULL; |
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} |
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} |
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EXPORT_SYMBOL(pxa2xx_pcm_free_dma_buffers); |
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MODULE_AUTHOR("Nicolas Pitre"); |
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MODULE_DESCRIPTION("Intel PXA2xx sound library"); |
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MODULE_LICENSE("GPL"); |
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