| /* |
| * Copyright (C) ST-Ericsson SA 2012 |
| * |
| * Author: Ola Lilja <ola.o.lilja@stericsson.com>, |
| * Roger Nilsson <roger.xr.nilsson@stericsson.com> |
| * for ST-Ericsson. |
| * |
| * License terms: |
| * |
| * 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 <asm/page.h> |
| |
| #include <linux/module.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/dmaengine.h> |
| #include <linux/slab.h> |
| #include <linux/platform_data/dma-ste-dma40.h> |
| |
| #include <sound/pcm.h> |
| #include <sound/pcm_params.h> |
| #include <sound/soc.h> |
| #include <sound/dmaengine_pcm.h> |
| |
| #include "ux500_msp_i2s.h" |
| #include "ux500_pcm.h" |
| |
| #define UX500_PLATFORM_MIN_RATE 8000 |
| #define UX500_PLATFORM_MAX_RATE 48000 |
| |
| #define UX500_PLATFORM_MIN_CHANNELS 1 |
| #define UX500_PLATFORM_MAX_CHANNELS 8 |
| |
| #define UX500_PLATFORM_PERIODS_BYTES_MIN 128 |
| #define UX500_PLATFORM_PERIODS_BYTES_MAX (64 * PAGE_SIZE) |
| #define UX500_PLATFORM_PERIODS_MIN 2 |
| #define UX500_PLATFORM_PERIODS_MAX 48 |
| #define UX500_PLATFORM_BUFFER_BYTES_MAX (2048 * PAGE_SIZE) |
| |
| static const struct snd_pcm_hardware ux500_pcm_hw = { |
| .info = SNDRV_PCM_INFO_INTERLEAVED | |
| SNDRV_PCM_INFO_MMAP | |
| SNDRV_PCM_INFO_RESUME | |
| SNDRV_PCM_INFO_PAUSE, |
| .formats = SNDRV_PCM_FMTBIT_S16_LE | |
| SNDRV_PCM_FMTBIT_U16_LE | |
| SNDRV_PCM_FMTBIT_S16_BE | |
| SNDRV_PCM_FMTBIT_U16_BE, |
| .rates = SNDRV_PCM_RATE_KNOT, |
| .rate_min = UX500_PLATFORM_MIN_RATE, |
| .rate_max = UX500_PLATFORM_MAX_RATE, |
| .channels_min = UX500_PLATFORM_MIN_CHANNELS, |
| .channels_max = UX500_PLATFORM_MAX_CHANNELS, |
| .buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX, |
| .period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN, |
| .period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX, |
| .periods_min = UX500_PLATFORM_PERIODS_MIN, |
| .periods_max = UX500_PLATFORM_PERIODS_MAX, |
| }; |
| |
| static struct dma_chan *ux500_pcm_request_chan(struct snd_soc_pcm_runtime *rtd, |
| struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_dai *dai = rtd->cpu_dai; |
| struct device *dev = dai->dev; |
| u16 per_data_width, mem_data_width; |
| struct stedma40_chan_cfg *dma_cfg; |
| struct ux500_msp_dma_params *dma_params; |
| |
| dev_dbg(dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id, |
| snd_pcm_stream_str(substream)); |
| |
| dma_params = snd_soc_dai_get_dma_data(dai, substream); |
| dma_cfg = dma_params->dma_cfg; |
| |
| mem_data_width = DMA_SLAVE_BUSWIDTH_2_BYTES; |
| |
| switch (dma_params->data_size) { |
| case 32: |
| per_data_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |
| break; |
| case 16: |
| per_data_width = DMA_SLAVE_BUSWIDTH_2_BYTES; |
| break; |
| case 8: |
| per_data_width = DMA_SLAVE_BUSWIDTH_1_BYTE; |
| break; |
| default: |
| per_data_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |
| } |
| |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| dma_cfg->src_info.data_width = mem_data_width; |
| dma_cfg->dst_info.data_width = per_data_width; |
| } else { |
| dma_cfg->src_info.data_width = per_data_width; |
| dma_cfg->dst_info.data_width = mem_data_width; |
| } |
| |
| return snd_dmaengine_pcm_request_channel(stedma40_filter, dma_cfg); |
| } |
| |
| static const struct snd_dmaengine_pcm_config ux500_dmaengine_pcm_config = { |
| .pcm_hardware = &ux500_pcm_hw, |
| .compat_request_channel = ux500_pcm_request_chan, |
| .prealloc_buffer_size = 128 * 1024, |
| }; |
| |
| int ux500_pcm_register_platform(struct platform_device *pdev) |
| { |
| int ret; |
| |
| ret = snd_dmaengine_pcm_register(&pdev->dev, |
| &ux500_dmaengine_pcm_config, |
| SND_DMAENGINE_PCM_FLAG_NO_RESIDUE | |
| SND_DMAENGINE_PCM_FLAG_COMPAT | |
| SND_DMAENGINE_PCM_FLAG_NO_DT); |
| if (ret < 0) { |
| dev_err(&pdev->dev, |
| "%s: ERROR: Failed to register platform '%s' (%d)!\n", |
| __func__, pdev->name, ret); |
| return ret; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(ux500_pcm_register_platform); |
| |
| int ux500_pcm_unregister_platform(struct platform_device *pdev) |
| { |
| snd_dmaengine_pcm_unregister(&pdev->dev); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(ux500_pcm_unregister_platform); |