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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-04 18:02:25 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-04 18:02:25 -0700 |
commit | fba9569924e06da076cb2ad12474bbd82d69f54d (patch) | |
tree | f0b7d9c82f8dd90f0dc757a4c00afc0872fc1484 /sound/soc/samsung/dma.c | |
parent | 3d0a8d10cfb4cc3d1877c29a866ee7d8a46aa2fa (diff) | |
parent | 4598fc2c94b68740e0269db03c98a1e7ad5af773 (diff) | |
download | blackbird-op-linux-fba9569924e06da076cb2ad12474bbd82d69f54d.tar.gz blackbird-op-linux-fba9569924e06da076cb2ad12474bbd82d69f54d.zip |
Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma
* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (63 commits)
dmaengine: mid_dma: mask_peripheral_interrupt only when dmac is idle
dmaengine/ep93xx_dma: add module.h include
pch_dma: Reduce wasting memory
pch_dma: Fix suspend issue
dma/timberdale: free_irq() on an error path
dma: shdma: transfer based runtime PM
dmaengine: shdma: protect against the IRQ handler
dmaengine i.MX DMA/SDMA: add missing include of linux/module.h
dmaengine: delete redundant chan_id and chancnt initialization in dma drivers
dmaengine/amba-pl08x: Check txd->llis_va before freeing dma_pool
dmaengine/amba-pl08x: Add support for sg len greater than one for slave transfers
serial: sh-sci: don't filter on DMA device, use only channel ID
ARM: SAMSUNG: Remove Samsung specific enum type for dma direction
ASoC: Samsung: Update DMA interface
spi/s3c64xx: Merge dma control code
spi/s3c64xx: Add support DMA engine API
ARM: SAMSUNG: Remove S3C-PL330-DMA driver
ARM: S5P64X0: Use generic DMA PL330 driver
ARM: S5PC100: Use generic DMA PL330 driver
ARM: S5PV210: Use generic DMA PL330 driver
...
Fix up fairly trivial conflicts in
- arch/arm/mach-exynos4/{Kconfig,clock.c}
- arch/arm/mach-s5p64x0/dma.c
Diffstat (limited to 'sound/soc/samsung/dma.c')
-rw-r--r-- | sound/soc/samsung/dma.c | 146 |
1 files changed, 60 insertions, 86 deletions
diff --git a/sound/soc/samsung/dma.c b/sound/soc/samsung/dma.c index 9465588b02f2..851346f7d68d 100644 --- a/sound/soc/samsung/dma.c +++ b/sound/soc/samsung/dma.c @@ -54,7 +54,6 @@ struct runtime_data { spinlock_t lock; int state; unsigned int dma_loaded; - unsigned int dma_limit; unsigned int dma_period; dma_addr_t dma_start; dma_addr_t dma_pos; @@ -62,77 +61,79 @@ struct runtime_data { struct s3c_dma_params *params; }; +static void audio_buffdone(void *data); + /* dma_enqueue * * place a dma buffer onto the queue for the dma system * to handle. -*/ + */ static void dma_enqueue(struct snd_pcm_substream *substream) { struct runtime_data *prtd = substream->runtime->private_data; dma_addr_t pos = prtd->dma_pos; unsigned int limit; - int ret; + struct samsung_dma_prep_info dma_info; pr_debug("Entered %s\n", __func__); - if (s3c_dma_has_circular()) - limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period; - else - limit = prtd->dma_limit; + limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period; pr_debug("%s: loaded %d, limit %d\n", __func__, prtd->dma_loaded, limit); - while (prtd->dma_loaded < limit) { - unsigned long len = prtd->dma_period; + dma_info.cap = (samsung_dma_has_circular() ? DMA_CYCLIC : DMA_SLAVE); + dma_info.direction = + (substream->stream == SNDRV_PCM_STREAM_PLAYBACK + ? DMA_TO_DEVICE : DMA_FROM_DEVICE); + dma_info.fp = audio_buffdone; + dma_info.fp_param = substream; + dma_info.period = prtd->dma_period; + dma_info.len = prtd->dma_period*limit; + while (prtd->dma_loaded < limit) { pr_debug("dma_loaded: %d\n", prtd->dma_loaded); - if ((pos + len) > prtd->dma_end) { - len = prtd->dma_end - pos; - pr_debug("%s: corrected dma len %ld\n", __func__, len); + if ((pos + dma_info.period) > prtd->dma_end) { + dma_info.period = prtd->dma_end - pos; + pr_debug("%s: corrected dma len %ld\n", + __func__, dma_info.period); } - ret = s3c2410_dma_enqueue(prtd->params->channel, - substream, pos, len); + dma_info.buf = pos; + prtd->params->ops->prepare(prtd->params->ch, &dma_info); - if (ret == 0) { - prtd->dma_loaded++; - pos += prtd->dma_period; - if (pos >= prtd->dma_end) - pos = prtd->dma_start; - } else - break; + prtd->dma_loaded++; + pos += prtd->dma_period; + if (pos >= prtd->dma_end) + pos = prtd->dma_start; } prtd->dma_pos = pos; } -static void audio_buffdone(struct s3c2410_dma_chan *channel, - void *dev_id, int size, - enum s3c2410_dma_buffresult result) +static void audio_buffdone(void *data) { - struct snd_pcm_substream *substream = dev_id; - struct runtime_data *prtd; + struct snd_pcm_substream *substream = data; + struct runtime_data *prtd = substream->runtime->private_data; pr_debug("Entered %s\n", __func__); - if (result == S3C2410_RES_ABORT || result == S3C2410_RES_ERR) - return; - - prtd = substream->runtime->private_data; + if (prtd->state & ST_RUNNING) { + prtd->dma_pos += prtd->dma_period; + if (prtd->dma_pos >= prtd->dma_end) + prtd->dma_pos = prtd->dma_start; - if (substream) - snd_pcm_period_elapsed(substream); + if (substream) + snd_pcm_period_elapsed(substream); - spin_lock(&prtd->lock); - if (prtd->state & ST_RUNNING && !s3c_dma_has_circular()) { - prtd->dma_loaded--; - dma_enqueue(substream); + spin_lock(&prtd->lock); + if (!samsung_dma_has_circular()) { + prtd->dma_loaded--; + dma_enqueue(substream); + } + spin_unlock(&prtd->lock); } - - spin_unlock(&prtd->lock); } static int dma_hw_params(struct snd_pcm_substream *substream, @@ -144,8 +145,7 @@ static int dma_hw_params(struct snd_pcm_substream *substream, unsigned long totbytes = params_buffer_bytes(params); struct s3c_dma_params *dma = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); - int ret = 0; - + struct samsung_dma_info dma_info; pr_debug("Entered %s\n", __func__); @@ -163,30 +163,26 @@ static int dma_hw_params(struct snd_pcm_substream *substream, pr_debug("params %p, client %p, channel %d\n", prtd->params, prtd->params->client, prtd->params->channel); - ret = s3c2410_dma_request(prtd->params->channel, - prtd->params->client, NULL); - - if (ret < 0) { - printk(KERN_ERR "failed to get dma channel\n"); - return ret; - } - - /* use the circular buffering if we have it available. */ - if (s3c_dma_has_circular()) - s3c2410_dma_setflags(prtd->params->channel, - S3C2410_DMAF_CIRCULAR); + prtd->params->ops = samsung_dma_get_ops(); + + dma_info.cap = (samsung_dma_has_circular() ? + DMA_CYCLIC : DMA_SLAVE); + dma_info.client = prtd->params->client; + dma_info.direction = + (substream->stream == SNDRV_PCM_STREAM_PLAYBACK + ? DMA_TO_DEVICE : DMA_FROM_DEVICE); + dma_info.width = prtd->params->dma_size; + dma_info.fifo = prtd->params->dma_addr; + prtd->params->ch = prtd->params->ops->request( + prtd->params->channel, &dma_info); } - s3c2410_dma_set_buffdone_fn(prtd->params->channel, - audio_buffdone); - snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); runtime->dma_bytes = totbytes; spin_lock_irq(&prtd->lock); prtd->dma_loaded = 0; - prtd->dma_limit = runtime->hw.periods_min; prtd->dma_period = params_period_bytes(params); prtd->dma_start = runtime->dma_addr; prtd->dma_pos = prtd->dma_start; @@ -206,7 +202,8 @@ static int dma_hw_free(struct snd_pcm_substream *substream) snd_pcm_set_runtime_buffer(substream, NULL); if (prtd->params) { - s3c2410_dma_free(prtd->params->channel, prtd->params->client); + prtd->params->ops->release(prtd->params->ch, + prtd->params->client); prtd->params = NULL; } @@ -225,23 +222,9 @@ static int dma_prepare(struct snd_pcm_substream *substream) if (!prtd->params) return 0; - /* channel needs configuring for mem=>device, increment memory addr, - * sync to pclk, half-word transfers to the IIS-FIFO. */ - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - s3c2410_dma_devconfig(prtd->params->channel, - S3C2410_DMASRC_MEM, - prtd->params->dma_addr); - } else { - s3c2410_dma_devconfig(prtd->params->channel, - S3C2410_DMASRC_HW, - prtd->params->dma_addr); - } - - s3c2410_dma_config(prtd->params->channel, - prtd->params->dma_size); - /* flush the DMA channel */ - s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_FLUSH); + prtd->params->ops->flush(prtd->params->ch); + prtd->dma_loaded = 0; prtd->dma_pos = prtd->dma_start; @@ -265,14 +248,14 @@ static int dma_trigger(struct snd_pcm_substream *substream, int cmd) case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: prtd->state |= ST_RUNNING; - s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_START); + prtd->params->ops->trigger(prtd->params->ch); break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: prtd->state &= ~ST_RUNNING; - s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_STOP); + prtd->params->ops->stop(prtd->params->ch); break; default: @@ -291,21 +274,12 @@ dma_pointer(struct snd_pcm_substream *substream) struct snd_pcm_runtime *runtime = substream->runtime; struct runtime_data *prtd = runtime->private_data; unsigned long res; - dma_addr_t src, dst; pr_debug("Entered %s\n", __func__); - spin_lock(&prtd->lock); - s3c2410_dma_getposition(prtd->params->channel, &src, &dst); - - if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) - res = dst - prtd->dma_start; - else - res = src - prtd->dma_start; - - spin_unlock(&prtd->lock); + res = prtd->dma_pos - prtd->dma_start; - pr_debug("Pointer %x %x\n", src, dst); + pr_debug("Pointer offset: %lu\n", res); /* we seem to be getting the odd error from the pcm library due * to out-of-bounds pointers. this is maybe due to the dma engine |