ASoC: Ux500: Add platform-driver
Add platform-driver handling all DMA-activities. Signed-off-by: Ola Lilja <ola.o.lilja@stericsson.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Ola Lilja
Mark Brown
Родитель
d7e7eb9155
Коммит
01a0c1139c
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@ -12,3 +12,10 @@ menuconfig SND_SOC_UX500
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config SND_SOC_UX500_PLAT_MSP_I2S
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tristate
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depends on SND_SOC_UX500
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config SND_SOC_UX500_PLAT_DMA
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tristate "Platform - DB8500 (DMA)"
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depends on SND_SOC_UX500
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select SND_SOC_DMAENGINE_PCM
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help
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Say Y if you want to enable the Ux500 platform-driver.
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@ -2,3 +2,6 @@
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snd-soc-ux500-plat-msp-i2s-objs := ux500_msp_dai.o ux500_msp_i2s.o
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obj-$(CONFIG_SND_SOC_UX500_PLAT_MSP_I2S) += snd-soc-ux500-plat-msp-i2s.o
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snd-soc-ux500-plat-dma-objs := ux500_pcm.o
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obj-$(CONFIG_SND_SOC_UX500_PLAT_DMA) += snd-soc-ux500-plat-dma.o
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@ -0,0 +1,318 @@
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/*
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* Copyright (C) ST-Ericsson SA 2012
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*
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* Author: Ola Lilja <ola.o.lilja@stericsson.com>,
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* Roger Nilsson <roger.xr.nilsson@stericsson.com>
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* for ST-Ericsson.
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*
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* License terms:
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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 published
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* by the Free Software Foundation.
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*/
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#include <asm/page.h>
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <linux/dmaengine.h>
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#include <linux/slab.h>
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#include <plat/ste_dma40.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/dmaengine_pcm.h>
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#include "ux500_msp_i2s.h"
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#include "ux500_pcm.h"
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static struct snd_pcm_hardware ux500_pcm_hw_playback = {
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.info = SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_RESUME |
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SNDRV_PCM_INFO_PAUSE,
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.formats = SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_U16_LE |
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SNDRV_PCM_FMTBIT_S16_BE |
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SNDRV_PCM_FMTBIT_U16_BE,
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.rates = SNDRV_PCM_RATE_KNOT,
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.rate_min = UX500_PLATFORM_MIN_RATE_PLAYBACK,
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.rate_max = UX500_PLATFORM_MAX_RATE_PLAYBACK,
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.channels_min = UX500_PLATFORM_MIN_CHANNELS,
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.channels_max = UX500_PLATFORM_MAX_CHANNELS,
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.buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX,
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.period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN,
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.period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX,
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.periods_min = UX500_PLATFORM_PERIODS_MIN,
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.periods_max = UX500_PLATFORM_PERIODS_MAX,
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};
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static struct snd_pcm_hardware ux500_pcm_hw_capture = {
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.info = SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_RESUME |
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SNDRV_PCM_INFO_PAUSE,
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.formats = SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_U16_LE |
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SNDRV_PCM_FMTBIT_S16_BE |
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SNDRV_PCM_FMTBIT_U16_BE,
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.rates = SNDRV_PCM_RATE_KNOT,
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.rate_min = UX500_PLATFORM_MIN_RATE_CAPTURE,
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.rate_max = UX500_PLATFORM_MAX_RATE_CAPTURE,
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.channels_min = UX500_PLATFORM_MIN_CHANNELS,
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.channels_max = UX500_PLATFORM_MAX_CHANNELS,
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.buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX,
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.period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN,
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.period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX,
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.periods_min = UX500_PLATFORM_PERIODS_MIN,
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.periods_max = UX500_PLATFORM_PERIODS_MAX,
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};
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static void ux500_pcm_dma_hw_free(struct device *dev,
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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 snd_dma_buffer *buf = runtime->dma_buffer_p;
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if (runtime->dma_area == NULL)
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return;
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if (buf != &substream->dma_buffer) {
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dma_free_coherent(buf->dev.dev, buf->bytes, buf->area,
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buf->addr);
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kfree(runtime->dma_buffer_p);
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}
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snd_pcm_set_runtime_buffer(substream, NULL);
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}
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static int ux500_pcm_open(struct snd_pcm_substream *substream)
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{
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int stream_id = substream->pstr->stream;
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *dai = rtd->cpu_dai;
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struct device *dev = dai->dev;
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int ret;
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struct ux500_msp_dma_params *dma_params;
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u16 per_data_width, mem_data_width;
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struct stedma40_chan_cfg *dma_cfg;
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dev_dbg(dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id,
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snd_pcm_stream_str(substream));
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dev_dbg(dev, "%s: Set runtime hwparams.\n", __func__);
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if (stream_id == SNDRV_PCM_STREAM_PLAYBACK)
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snd_soc_set_runtime_hwparams(substream,
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&ux500_pcm_hw_playback);
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else
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snd_soc_set_runtime_hwparams(substream,
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&ux500_pcm_hw_capture);
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/* ensure that buffer size is a multiple of period size */
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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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dev_err(dev, "%s: Error: snd_pcm_hw_constraints failed (%d)\n",
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__func__, ret);
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return ret;
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}
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dev_dbg(dev, "%s: Set hw-struct for %s.\n", __func__,
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snd_pcm_stream_str(substream));
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runtime->hw = (stream_id == SNDRV_PCM_STREAM_PLAYBACK) ?
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ux500_pcm_hw_playback : ux500_pcm_hw_capture;
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mem_data_width = STEDMA40_HALFWORD_WIDTH;
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dma_params = snd_soc_dai_get_dma_data(dai, substream);
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switch (dma_params->data_size) {
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case 32:
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per_data_width = STEDMA40_WORD_WIDTH;
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break;
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case 16:
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per_data_width = STEDMA40_HALFWORD_WIDTH;
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break;
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case 8:
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per_data_width = STEDMA40_BYTE_WIDTH;
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break;
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default:
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per_data_width = STEDMA40_WORD_WIDTH;
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dev_warn(rtd->platform->dev,
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"%s: Unknown data-size (%d)! Assuming 32 bits.\n",
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__func__, dma_params->data_size);
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}
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dma_cfg = dma_params->dma_cfg;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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dma_cfg->src_info.data_width = mem_data_width;
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dma_cfg->dst_info.data_width = per_data_width;
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} else {
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dma_cfg->src_info.data_width = per_data_width;
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dma_cfg->dst_info.data_width = mem_data_width;
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}
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ret = snd_dmaengine_pcm_open(substream, stedma40_filter, dma_cfg);
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if (ret) {
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dev_dbg(dai->dev,
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"%s: ERROR: snd_dmaengine_pcm_open failed (%d)!\n",
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__func__, ret);
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return ret;
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}
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snd_dmaengine_pcm_set_data(substream, dma_cfg);
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return 0;
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}
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static int ux500_pcm_close(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *dai = rtd->cpu_dai;
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dev_dbg(dai->dev, "%s: Enter\n", __func__);
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snd_dmaengine_pcm_close(substream);
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return 0;
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}
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static int ux500_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *hw_params)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_dma_buffer *buf = runtime->dma_buffer_p;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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int ret = 0;
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int size;
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dev_dbg(rtd->platform->dev, "%s: Enter\n", __func__);
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size = params_buffer_bytes(hw_params);
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if (buf) {
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if (buf->bytes >= size)
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goto out;
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ux500_pcm_dma_hw_free(NULL, substream);
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}
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if (substream->dma_buffer.area != NULL &&
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substream->dma_buffer.bytes >= size) {
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buf = &substream->dma_buffer;
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} else {
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buf = kmalloc(sizeof(struct snd_dma_buffer), GFP_KERNEL);
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if (!buf)
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goto nomem;
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buf->dev.type = SNDRV_DMA_TYPE_DEV;
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buf->dev.dev = NULL;
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buf->area = dma_alloc_coherent(NULL, size, &buf->addr,
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GFP_KERNEL);
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buf->bytes = size;
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buf->private_data = NULL;
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if (!buf->area)
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goto free;
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}
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snd_pcm_set_runtime_buffer(substream, buf);
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ret = 1;
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out:
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runtime->dma_bytes = size;
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return ret;
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free:
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kfree(buf);
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nomem:
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return -ENOMEM;
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}
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static int ux500_pcm_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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dev_dbg(rtd->platform->dev, "%s: Enter\n", __func__);
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ux500_pcm_dma_hw_free(NULL, substream);
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return 0;
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}
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static int ux500_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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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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dev_dbg(rtd->platform->dev, "%s: Enter.\n", __func__);
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return dma_mmap_coherent(NULL, vma, runtime->dma_area,
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runtime->dma_addr, runtime->dma_bytes);
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}
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static struct snd_pcm_ops ux500_pcm_ops = {
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.open = ux500_pcm_open,
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.close = ux500_pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = ux500_pcm_hw_params,
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.hw_free = ux500_pcm_hw_free,
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.trigger = snd_dmaengine_pcm_trigger,
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.pointer = snd_dmaengine_pcm_pointer,
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.mmap = ux500_pcm_mmap
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};
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int ux500_pcm_new(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_pcm *pcm = rtd->pcm;
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dev_dbg(rtd->platform->dev, "%s: Enter (id = '%s').\n", __func__,
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pcm->id);
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pcm->info_flags = 0;
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return 0;
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}
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static struct snd_soc_platform_driver ux500_pcm_soc_drv = {
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.ops = &ux500_pcm_ops,
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.pcm_new = ux500_pcm_new,
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};
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static int __devexit ux500_pcm_drv_probe(struct platform_device *pdev)
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{
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int ret;
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ret = snd_soc_register_platform(&pdev->dev, &ux500_pcm_soc_drv);
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if (ret < 0) {
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dev_err(&pdev->dev,
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"%s: ERROR: Failed to register platform '%s' (%d)!\n",
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__func__, pdev->name, ret);
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return ret;
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}
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return 0;
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}
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static int __devinit ux500_pcm_drv_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_platform(&pdev->dev);
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return 0;
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}
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static struct platform_driver ux500_pcm_driver = {
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.driver = {
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.name = "ux500-pcm",
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.owner = THIS_MODULE,
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},
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.probe = ux500_pcm_drv_probe,
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.remove = __devexit_p(ux500_pcm_drv_remove),
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};
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module_platform_driver(ux500_pcm_driver);
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MODULE_LICENSE("GPLv2");
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@ -0,0 +1,35 @@
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/*
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* Copyright (C) ST-Ericsson SA 2012
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*
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* Author: Ola Lilja <ola.o.lilja@stericsson.com>,
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* Roger Nilsson <roger.xr.nilsson@stericsson.com>
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* for ST-Ericsson.
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*
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* License terms:
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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 published
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* by the Free Software Foundation.
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*/
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#ifndef UX500_PCM_H
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#define UX500_PCM_H
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#include <asm/page.h>
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#include <linux/workqueue.h>
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#define UX500_PLATFORM_MIN_RATE_PLAYBACK 8000
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#define UX500_PLATFORM_MAX_RATE_PLAYBACK 48000
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#define UX500_PLATFORM_MIN_RATE_CAPTURE 8000
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#define UX500_PLATFORM_MAX_RATE_CAPTURE 48000
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#define UX500_PLATFORM_MIN_CHANNELS 1
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#define UX500_PLATFORM_MAX_CHANNELS 8
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#define UX500_PLATFORM_PERIODS_BYTES_MIN 128
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#define UX500_PLATFORM_PERIODS_BYTES_MAX (64 * PAGE_SIZE)
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#define UX500_PLATFORM_PERIODS_MIN 2
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#define UX500_PLATFORM_PERIODS_MAX 48
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#define UX500_PLATFORM_BUFFER_BYTES_MAX (2048 * PAGE_SIZE)
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#endif
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