--- /dev/null
+/*
+ * 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 <plat/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"
+
+static struct snd_pcm_hardware ux500_pcm_hw_playback = {
+ .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_PLAYBACK,
+ .rate_max = UX500_PLATFORM_MAX_RATE_PLAYBACK,
+ .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 snd_pcm_hardware ux500_pcm_hw_capture = {
+ .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_CAPTURE,
+ .rate_max = UX500_PLATFORM_MAX_RATE_CAPTURE,
+ .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 void ux500_pcm_dma_hw_free(struct device *dev,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_dma_buffer *buf = runtime->dma_buffer_p;
+
+ if (runtime->dma_area == NULL)
+ return;
+
+ if (buf != &substream->dma_buffer) {
+ dma_free_coherent(buf->dev.dev, buf->bytes, buf->area,
+ buf->addr);
+ kfree(runtime->dma_buffer_p);
+ }
+
+ snd_pcm_set_runtime_buffer(substream, NULL);
+}
+
+static int ux500_pcm_open(struct snd_pcm_substream *substream)
+{
+ int stream_id = substream->pstr->stream;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *dai = rtd->cpu_dai;
+ struct device *dev = dai->dev;
+ int ret;
+ struct ux500_msp_dma_params *dma_params;
+ u16 per_data_width, mem_data_width;
+ struct stedma40_chan_cfg *dma_cfg;
+
+ dev_dbg(dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id,
+ snd_pcm_stream_str(substream));
+
+ dev_dbg(dev, "%s: Set runtime hwparams.\n", __func__);
+ if (stream_id == SNDRV_PCM_STREAM_PLAYBACK)
+ snd_soc_set_runtime_hwparams(substream,
+ &ux500_pcm_hw_playback);
+ else
+ snd_soc_set_runtime_hwparams(substream,
+ &ux500_pcm_hw_capture);
+
+ /* 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) {
+ dev_err(dev, "%s: Error: snd_pcm_hw_constraints failed (%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ dev_dbg(dev, "%s: Set hw-struct for %s.\n", __func__,
+ snd_pcm_stream_str(substream));
+ runtime->hw = (stream_id == SNDRV_PCM_STREAM_PLAYBACK) ?
+ ux500_pcm_hw_playback : ux500_pcm_hw_capture;
+
+ mem_data_width = STEDMA40_HALFWORD_WIDTH;
+
+ dma_params = snd_soc_dai_get_dma_data(dai, substream);
+ switch (dma_params->data_size) {
+ case 32:
+ per_data_width = STEDMA40_WORD_WIDTH;
+ break;
+ case 16:
+ per_data_width = STEDMA40_HALFWORD_WIDTH;
+ break;
+ case 8:
+ per_data_width = STEDMA40_BYTE_WIDTH;
+ break;
+ default:
+ per_data_width = STEDMA40_WORD_WIDTH;
+ dev_warn(rtd->platform->dev,
+ "%s: Unknown data-size (%d)! Assuming 32 bits.\n",
+ __func__, dma_params->data_size);
+ }
+
+ dma_cfg = dma_params->dma_cfg;
+
+ 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;
+ }
+
+
+ ret = snd_dmaengine_pcm_open(substream, stedma40_filter, dma_cfg);
+ if (ret) {
+ dev_dbg(dai->dev,
+ "%s: ERROR: snd_dmaengine_pcm_open failed (%d)!\n",
+ __func__, ret);
+ return ret;
+ }
+
+ snd_dmaengine_pcm_set_data(substream, dma_cfg);
+
+ return 0;
+}
+
+static int ux500_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *dai = rtd->cpu_dai;
+
+ dev_dbg(dai->dev, "%s: Enter\n", __func__);
+
+ snd_dmaengine_pcm_close(substream);
+
+ return 0;
+}
+
+static int ux500_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_dma_buffer *buf = runtime->dma_buffer_p;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ int ret = 0;
+ int size;
+
+ dev_dbg(rtd->platform->dev, "%s: Enter\n", __func__);
+
+ size = params_buffer_bytes(hw_params);
+
+ if (buf) {
+ if (buf->bytes >= size)
+ goto out;
+ ux500_pcm_dma_hw_free(NULL, substream);
+ }
+
+ if (substream->dma_buffer.area != NULL &&
+ substream->dma_buffer.bytes >= size) {
+ buf = &substream->dma_buffer;
+ } else {
+ buf = kmalloc(sizeof(struct snd_dma_buffer), GFP_KERNEL);
+ if (!buf)
+ goto nomem;
+
+ buf->dev.type = SNDRV_DMA_TYPE_DEV;
+ buf->dev.dev = NULL;
+ buf->area = dma_alloc_coherent(NULL, size, &buf->addr,
+ GFP_KERNEL);
+ buf->bytes = size;
+ buf->private_data = NULL;
+
+ if (!buf->area)
+ goto free;
+ }
+ snd_pcm_set_runtime_buffer(substream, buf);
+ ret = 1;
+ out:
+ runtime->dma_bytes = size;
+ return ret;
+
+ free:
+ kfree(buf);
+ nomem:
+ return -ENOMEM;
+}
+
+static int ux500_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+
+ dev_dbg(rtd->platform->dev, "%s: Enter\n", __func__);
+
+ ux500_pcm_dma_hw_free(NULL, substream);
+
+ return 0;
+}
+
+static int ux500_pcm_mmap(struct snd_pcm_substream *substream,
+ struct vm_area_struct *vma)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+
+ dev_dbg(rtd->platform->dev, "%s: Enter.\n", __func__);
+
+ return dma_mmap_coherent(NULL, vma, runtime->dma_area,
+ runtime->dma_addr, runtime->dma_bytes);
+}
+
+static struct snd_pcm_ops ux500_pcm_ops = {
+ .open = ux500_pcm_open,
+ .close = ux500_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = ux500_pcm_hw_params,
+ .hw_free = ux500_pcm_hw_free,
+ .trigger = snd_dmaengine_pcm_trigger,
+ .pointer = snd_dmaengine_pcm_pointer,
+ .mmap = ux500_pcm_mmap
+};
+
+int ux500_pcm_new(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_pcm *pcm = rtd->pcm;
+
+ dev_dbg(rtd->platform->dev, "%s: Enter (id = '%s').\n", __func__,
+ pcm->id);
+
+ pcm->info_flags = 0;
+
+ return 0;
+}
+
+static struct snd_soc_platform_driver ux500_pcm_soc_drv = {
+ .ops = &ux500_pcm_ops,
+ .pcm_new = ux500_pcm_new,
+};
+
+static int __devexit ux500_pcm_drv_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = snd_soc_register_platform(&pdev->dev, &ux500_pcm_soc_drv);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "%s: ERROR: Failed to register platform '%s' (%d)!\n",
+ __func__, pdev->name, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __devinit ux500_pcm_drv_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_platform(&pdev->dev);
+
+ return 0;
+}
+
+static struct platform_driver ux500_pcm_driver = {
+ .driver = {
+ .name = "ux500-pcm",
+ .owner = THIS_MODULE,
+ },
+
+ .probe = ux500_pcm_drv_probe,
+ .remove = __devexit_p(ux500_pcm_drv_remove),
+};
+module_platform_driver(ux500_pcm_driver);
+
+MODULE_LICENSE("GPLv2");
projects / platform / kernel / linux-stable.git / commitdiff