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-rw-r--r--sound/soc/jz4740/jz4740-pcm.c358
1 files changed, 0 insertions, 358 deletions
diff --git a/sound/soc/jz4740/jz4740-pcm.c b/sound/soc/jz4740/jz4740-pcm.c
deleted file mode 100644
index 1d7ef28..0000000
--- a/sound/soc/jz4740/jz4740-pcm.c
+++ /dev/null
@@ -1,358 +0,0 @@
-/*
- * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-
-#include <linux/dma-mapping.h>
-
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/soc.h>
-
-#include <asm/mach-jz4740/dma.h>
-#include "jz4740-pcm.h"
-
-struct jz4740_runtime_data {
- unsigned long dma_period;
- dma_addr_t dma_start;
- dma_addr_t dma_pos;
- dma_addr_t dma_end;
-
- struct jz4740_dma_chan *dma;
-
- dma_addr_t fifo_addr;
-};
-
-/* identify hardware playback capabilities */
-static const struct snd_pcm_hardware jz4740_pcm_hardware = {
- .info = SNDRV_PCM_INFO_MMAP |
- SNDRV_PCM_INFO_MMAP_VALID |
- SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_BLOCK_TRANSFER,
- .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
-
- .rates = SNDRV_PCM_RATE_8000_48000,
- .channels_min = 1,
- .channels_max = 2,
- .period_bytes_min = 16,
- .period_bytes_max = 2 * PAGE_SIZE,
- .periods_min = 2,
- .periods_max = 128,
- .buffer_bytes_max = 128 * 2 * PAGE_SIZE,
- .fifo_size = 32,
-};
-
-static void jz4740_pcm_start_transfer(struct jz4740_runtime_data *prtd,
- struct snd_pcm_substream *substream)
-{
- unsigned long count;
-
- if (prtd->dma_pos == prtd->dma_end)
- prtd->dma_pos = prtd->dma_start;
-
- if (prtd->dma_pos + prtd->dma_period > prtd->dma_end)
- count = prtd->dma_end - prtd->dma_pos;
- else
- count = prtd->dma_period;
-
- jz4740_dma_disable(prtd->dma);
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- jz4740_dma_set_src_addr(prtd->dma, prtd->dma_pos);
- jz4740_dma_set_dst_addr(prtd->dma, prtd->fifo_addr);
- } else {
- jz4740_dma_set_src_addr(prtd->dma, prtd->fifo_addr);
- jz4740_dma_set_dst_addr(prtd->dma, prtd->dma_pos);
- }
-
- jz4740_dma_set_transfer_count(prtd->dma, count);
-
- prtd->dma_pos += count;
-
- jz4740_dma_enable(prtd->dma);
-}
-
-static void jz4740_pcm_dma_transfer_done(struct jz4740_dma_chan *dma, int err,
- void *dev_id)
-{
- struct snd_pcm_substream *substream = dev_id;
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct jz4740_runtime_data *prtd = runtime->private_data;
-
- snd_pcm_period_elapsed(substream);
-
- jz4740_pcm_start_transfer(prtd, substream);
-}
-
-static int jz4740_pcm_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct jz4740_runtime_data *prtd = runtime->private_data;
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct jz4740_pcm_config *config;
-
- config = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
-
- if (!config)
- return 0;
-
- if (!prtd->dma) {
- if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
- prtd->dma = jz4740_dma_request(substream, "PCM Capture");
- else
- prtd->dma = jz4740_dma_request(substream, "PCM Playback");
- }
-
- if (!prtd->dma)
- return -EBUSY;
-
- jz4740_dma_configure(prtd->dma, &config->dma_config);
- prtd->fifo_addr = config->fifo_addr;
-
- jz4740_dma_set_complete_cb(prtd->dma, jz4740_pcm_dma_transfer_done);
-
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
- runtime->dma_bytes = params_buffer_bytes(params);
-
- prtd->dma_period = params_period_bytes(params);
- prtd->dma_start = runtime->dma_addr;
- prtd->dma_pos = prtd->dma_start;
- prtd->dma_end = prtd->dma_start + runtime->dma_bytes;
-
- return 0;
-}
-
-static int jz4740_pcm_hw_free(struct snd_pcm_substream *substream)
-{
- struct jz4740_runtime_data *prtd = substream->runtime->private_data;
-
- snd_pcm_set_runtime_buffer(substream, NULL);
- if (prtd->dma) {
- jz4740_dma_free(prtd->dma);
- prtd->dma = NULL;
- }
-
- return 0;
-}
-
-static int jz4740_pcm_prepare(struct snd_pcm_substream *substream)
-{
- struct jz4740_runtime_data *prtd = substream->runtime->private_data;
-
- if (!prtd->dma)
- return -EBUSY;
-
- prtd->dma_pos = prtd->dma_start;
-
- return 0;
-}
-
-static int jz4740_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct jz4740_runtime_data *prtd = runtime->private_data;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_RESUME:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- jz4740_pcm_start_transfer(prtd, substream);
- break;
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- jz4740_dma_disable(prtd->dma);
- break;
- default:
- break;
- }
-
- return 0;
-}
-
-static snd_pcm_uframes_t jz4740_pcm_pointer(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct jz4740_runtime_data *prtd = runtime->private_data;
- unsigned long byte_offset;
- snd_pcm_uframes_t offset;
- struct jz4740_dma_chan *dma = prtd->dma;
-
- /* prtd->dma_pos points to the end of the current transfer. So by
- * subtracting prdt->dma_start we get the offset to the end of the
- * current period in bytes. By subtracting the residue of the transfer
- * we get the current offset in bytes. */
- byte_offset = prtd->dma_pos - prtd->dma_start;
- byte_offset -= jz4740_dma_get_residue(dma);
-
- offset = bytes_to_frames(runtime, byte_offset);
- if (offset >= runtime->buffer_size)
- offset = 0;
-
- return offset;
-}
-
-static int jz4740_pcm_open(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct jz4740_runtime_data *prtd;
-
- prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
- if (prtd == NULL)
- return -ENOMEM;
-
- snd_soc_set_runtime_hwparams(substream, &jz4740_pcm_hardware);
-
- runtime->private_data = prtd;
-
- return 0;
-}
-
-static int jz4740_pcm_close(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct jz4740_runtime_data *prtd = runtime->private_data;
-
- kfree(prtd);
-
- return 0;
-}
-
-static int jz4740_pcm_mmap(struct snd_pcm_substream *substream,
- struct vm_area_struct *vma)
-{
- return remap_pfn_range(vma, vma->vm_start,
- substream->dma_buffer.addr >> PAGE_SHIFT,
- vma->vm_end - vma->vm_start, vma->vm_page_prot);
-}
-
-static struct snd_pcm_ops jz4740_pcm_ops = {
- .open = jz4740_pcm_open,
- .close = jz4740_pcm_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = jz4740_pcm_hw_params,
- .hw_free = jz4740_pcm_hw_free,
- .prepare = jz4740_pcm_prepare,
- .trigger = jz4740_pcm_trigger,
- .pointer = jz4740_pcm_pointer,
- .mmap = jz4740_pcm_mmap,
-};
-
-static int jz4740_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
-{
- struct snd_pcm_substream *substream = pcm->streams[stream].substream;
- struct snd_dma_buffer *buf = &substream->dma_buffer;
- size_t size = jz4740_pcm_hardware.buffer_bytes_max;
-
- buf->dev.type = SNDRV_DMA_TYPE_DEV;
- buf->dev.dev = pcm->card->dev;
- buf->private_data = NULL;
-
- buf->area = dma_alloc_noncoherent(pcm->card->dev, size,
- &buf->addr, GFP_KERNEL);
- if (!buf->area)
- return -ENOMEM;
-
- buf->bytes = size;
-
- return 0;
-}
-
-static void jz4740_pcm_free(struct snd_pcm *pcm)
-{
- struct snd_pcm_substream *substream;
- struct snd_dma_buffer *buf;
- int stream;
-
- for (stream = 0; stream < SNDRV_PCM_STREAM_LAST; ++stream) {
- substream = pcm->streams[stream].substream;
- if (!substream)
- continue;
-
- buf = &substream->dma_buffer;
- if (!buf->area)
- continue;
-
- dma_free_noncoherent(pcm->card->dev, buf->bytes, buf->area,
- buf->addr);
- buf->area = NULL;
- }
-}
-
-static int jz4740_pcm_new(struct snd_soc_pcm_runtime *rtd)
-{
- struct snd_card *card = rtd->card->snd_card;
- struct snd_pcm *pcm = rtd->pcm;
- int ret;
-
- ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
- if (ret)
- return ret;
-
- if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
- ret = jz4740_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_PLAYBACK);
- if (ret)
- goto err;
- }
-
- if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
- ret = jz4740_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_CAPTURE);
- if (ret)
- goto err;
- }
-
-err:
- return ret;
-}
-
-static struct snd_soc_platform_driver jz4740_soc_platform = {
- .ops = &jz4740_pcm_ops,
- .pcm_new = jz4740_pcm_new,
- .pcm_free = jz4740_pcm_free,
-};
-
-static int jz4740_pcm_probe(struct platform_device *pdev)
-{
- return snd_soc_register_platform(&pdev->dev, &jz4740_soc_platform);
-}
-
-static int jz4740_pcm_remove(struct platform_device *pdev)
-{
- snd_soc_unregister_platform(&pdev->dev);
- return 0;
-}
-
-static struct platform_driver jz4740_pcm_driver = {
- .probe = jz4740_pcm_probe,
- .remove = jz4740_pcm_remove,
- .driver = {
- .name = "jz4740-pcm-audio",
- .owner = THIS_MODULE,
- },
-};
-
-module_platform_driver(jz4740_pcm_driver);
-
-MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
-MODULE_DESCRIPTION("Ingenic SoC JZ4740 PCM driver");
-MODULE_LICENSE("GPL");
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