From: Laxman Dewangan ldewangan@nvidia.com
Remove the support code which uses the legacy APB DMA driver for accessing the I2S FIFO. The driver will use the dmaengine based APB DMA driver for accessing reqding/writing to I2S FIFO.
Signed-off-by: Laxman Dewangan ldewangan@nvidia.com Signed-off-by: Stephen Warren swarren@nvidia.com --- sound/soc/tegra/Kconfig | 2 +- sound/soc/tegra/tegra_pcm.c | 232 ------------------------------------------- sound/soc/tegra/tegra_pcm.h | 14 --- 3 files changed, 1 insertions(+), 247 deletions(-)
diff --git a/sound/soc/tegra/Kconfig b/sound/soc/tegra/Kconfig index 02bcd30..19e5fe7 100644 --- a/sound/soc/tegra/Kconfig +++ b/sound/soc/tegra/Kconfig @@ -1,6 +1,6 @@ config SND_SOC_TEGRA tristate "SoC Audio for the Tegra System-on-Chip" - depends on ARCH_TEGRA && (TEGRA_SYSTEM_DMA || TEGRA20_APB_DMA) + depends on ARCH_TEGRA && TEGRA20_APB_DMA select REGMAP_MMIO select SND_SOC_DMAENGINE_PCM if TEGRA20_APB_DMA help diff --git a/sound/soc/tegra/tegra_pcm.c b/sound/soc/tegra/tegra_pcm.c index 8d6900c..e187339 100644 --- a/sound/soc/tegra/tegra_pcm.c +++ b/sound/soc/tegra/tegra_pcm.c @@ -57,237 +57,6 @@ static const struct snd_pcm_hardware tegra_pcm_hardware = { .fifo_size = 4, };
-#if defined(CONFIG_TEGRA_SYSTEM_DMA) -static void tegra_pcm_queue_dma(struct tegra_runtime_data *prtd) -{ - struct snd_pcm_substream *substream = prtd->substream; - struct snd_dma_buffer *buf = &substream->dma_buffer; - struct tegra_dma_req *dma_req; - unsigned long addr; - - dma_req = &prtd->dma_req[prtd->dma_req_idx]; - prtd->dma_req_idx = 1 - prtd->dma_req_idx; - - addr = buf->addr + prtd->dma_pos; - prtd->dma_pos += dma_req->size; - if (prtd->dma_pos >= prtd->dma_pos_end) - prtd->dma_pos = 0; - - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) - dma_req->source_addr = addr; - else - dma_req->dest_addr = addr; - - tegra_dma_enqueue_req(prtd->dma_chan, dma_req); -} - -static void dma_complete_callback(struct tegra_dma_req *req) -{ - struct tegra_runtime_data *prtd = (struct tegra_runtime_data *)req->dev; - struct snd_pcm_substream *substream = prtd->substream; - struct snd_pcm_runtime *runtime = substream->runtime; - - spin_lock(&prtd->lock); - - if (!prtd->running) { - spin_unlock(&prtd->lock); - return; - } - - if (++prtd->period_index >= runtime->periods) - prtd->period_index = 0; - - tegra_pcm_queue_dma(prtd); - - spin_unlock(&prtd->lock); - - snd_pcm_period_elapsed(substream); -} - -static void setup_dma_tx_request(struct tegra_dma_req *req, - struct tegra_pcm_dma_params * dmap) -{ - req->complete = dma_complete_callback; - req->to_memory = false; - req->dest_addr = dmap->addr; - req->dest_wrap = dmap->wrap; - req->source_bus_width = 32; - req->source_wrap = 0; - req->dest_bus_width = dmap->width; - req->req_sel = dmap->req_sel; -} - -static void setup_dma_rx_request(struct tegra_dma_req *req, - struct tegra_pcm_dma_params * dmap) -{ - req->complete = dma_complete_callback; - req->to_memory = true; - req->source_addr = dmap->addr; - req->dest_wrap = 0; - req->source_bus_width = dmap->width; - req->source_wrap = dmap->wrap; - req->dest_bus_width = 32; - req->req_sel = dmap->req_sel; -} - -static int tegra_pcm_open(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct tegra_runtime_data *prtd; - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct tegra_pcm_dma_params * dmap; - int ret = 0; - - prtd = kzalloc(sizeof(struct tegra_runtime_data), GFP_KERNEL); - if (prtd == NULL) - return -ENOMEM; - - runtime->private_data = prtd; - prtd->substream = substream; - - spin_lock_init(&prtd->lock); - - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - dmap = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); - setup_dma_tx_request(&prtd->dma_req[0], dmap); - setup_dma_tx_request(&prtd->dma_req[1], dmap); - } else { - dmap = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); - setup_dma_rx_request(&prtd->dma_req[0], dmap); - setup_dma_rx_request(&prtd->dma_req[1], dmap); - } - - prtd->dma_req[0].dev = prtd; - prtd->dma_req[1].dev = prtd; - - prtd->dma_chan = tegra_dma_allocate_channel(TEGRA_DMA_MODE_ONESHOT); - if (prtd->dma_chan == NULL) { - ret = -ENOMEM; - goto err; - } - - /* Set HW params now that initialization is complete */ - snd_soc_set_runtime_hwparams(substream, &tegra_pcm_hardware); - - /* Ensure that buffer size is a multiple of period size */ - ret = snd_pcm_hw_constraint_integer(runtime, - SNDRV_PCM_HW_PARAM_PERIODS); - if (ret < 0) - goto err; - - return 0; - -err: - if (prtd->dma_chan) { - tegra_dma_free_channel(prtd->dma_chan); - } - - kfree(prtd); - - return ret; -} - -static int tegra_pcm_close(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct tegra_runtime_data *prtd = runtime->private_data; - - tegra_dma_free_channel(prtd->dma_chan); - - kfree(prtd); - - return 0; -} - -static int tegra_pcm_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct tegra_runtime_data *prtd = runtime->private_data; - - snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); - - prtd->dma_req[0].size = params_period_bytes(params); - prtd->dma_req[1].size = prtd->dma_req[0].size; - - return 0; -} - -static int tegra_pcm_hw_free(struct snd_pcm_substream *substream) -{ - snd_pcm_set_runtime_buffer(substream, NULL); - - return 0; -} - -static int tegra_pcm_trigger(struct snd_pcm_substream *substream, int cmd) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct tegra_runtime_data *prtd = runtime->private_data; - unsigned long flags; - - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - prtd->dma_pos = 0; - prtd->dma_pos_end = frames_to_bytes(runtime, runtime->periods * runtime->period_size); - prtd->period_index = 0; - prtd->dma_req_idx = 0; - /* Fall-through */ - case SNDRV_PCM_TRIGGER_RESUME: - case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - spin_lock_irqsave(&prtd->lock, flags); - prtd->running = 1; - spin_unlock_irqrestore(&prtd->lock, flags); - tegra_pcm_queue_dma(prtd); - tegra_pcm_queue_dma(prtd); - break; - case SNDRV_PCM_TRIGGER_STOP: - case SNDRV_PCM_TRIGGER_SUSPEND: - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - spin_lock_irqsave(&prtd->lock, flags); - prtd->running = 0; - spin_unlock_irqrestore(&prtd->lock, flags); - tegra_dma_dequeue_req(prtd->dma_chan, &prtd->dma_req[0]); - tegra_dma_dequeue_req(prtd->dma_chan, &prtd->dma_req[1]); - break; - default: - return -EINVAL; - } - - return 0; -} - -static snd_pcm_uframes_t tegra_pcm_pointer(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct tegra_runtime_data *prtd = runtime->private_data; - - return prtd->period_index * runtime->period_size; -} - - -static int tegra_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); -} - -static struct snd_pcm_ops tegra_pcm_ops = { - .open = tegra_pcm_open, - .close = tegra_pcm_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = tegra_pcm_hw_params, - .hw_free = tegra_pcm_hw_free, - .trigger = tegra_pcm_trigger, - .pointer = tegra_pcm_pointer, - .mmap = tegra_pcm_mmap, -}; -#else static int tegra_pcm_open(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; @@ -399,7 +168,6 @@ static struct snd_pcm_ops tegra_pcm_ops = { .pointer = snd_dmaengine_pcm_pointer, .mmap = tegra_pcm_mmap, }; -#endif
static int tegra_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream) { diff --git a/sound/soc/tegra/tegra_pcm.h b/sound/soc/tegra/tegra_pcm.h index a3a4503..b40279b 100644 --- a/sound/soc/tegra/tegra_pcm.h +++ b/sound/soc/tegra/tegra_pcm.h @@ -40,20 +40,6 @@ struct tegra_pcm_dma_params { unsigned long req_sel; };
-#if defined(CONFIG_TEGRA_SYSTEM_DMA) -struct tegra_runtime_data { - struct snd_pcm_substream *substream; - spinlock_t lock; - int running; - int dma_pos; - int dma_pos_end; - int period_index; - int dma_req_idx; - struct tegra_dma_req dma_req[2]; - struct tegra_dma_channel *dma_chan; -}; -#endif - int tegra_pcm_platform_register(struct device *dev); void tegra_pcm_platform_unregister(struct device *dev);