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Diffstat (limited to 'sound/soc/ep93xx/ep93xx-pcm.c')
-rw-r--r--sound/soc/ep93xx/ep93xx-pcm.c338
1 files changed, 0 insertions, 338 deletions
diff --git a/sound/soc/ep93xx/ep93xx-pcm.c b/sound/soc/ep93xx/ep93xx-pcm.c
deleted file mode 100644
index 2f121ddbe4b..00000000000
--- a/sound/soc/ep93xx/ep93xx-pcm.c
+++ /dev/null
@@ -1,338 +0,0 @@
-/*
- * linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface
- *
- * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
- * Copyright (C) 2006 Applied Data Systems
- *
- * Rewritten for the SoC audio subsystem (Based on PXA2xx code):
- * Copyright (c) 2008 Ryan Mallon <ryan@bluewatersys.com>
- *
- * 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 <linux/module.h>
-#include <linux/init.h>
-#include <linux/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 <mach/dma.h>
-#include <mach/hardware.h>
-#include <mach/ep93xx-regs.h>
-
-#include "ep93xx-pcm.h"
-
-static const struct snd_pcm_hardware ep93xx_pcm_hardware = {
- .info = (SNDRV_PCM_INFO_MMAP |
- SNDRV_PCM_INFO_MMAP_VALID |
- SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_BLOCK_TRANSFER),
-
- .rates = SNDRV_PCM_RATE_8000_48000,
- .rate_min = SNDRV_PCM_RATE_8000,
- .rate_max = SNDRV_PCM_RATE_48000,
-
- .formats = (SNDRV_PCM_FMTBIT_S16_LE |
- SNDRV_PCM_FMTBIT_S24_LE |
- SNDRV_PCM_FMTBIT_S32_LE),
-
- .buffer_bytes_max = 131072,
- .period_bytes_min = 32,
- .period_bytes_max = 32768,
- .periods_min = 1,
- .periods_max = 32,
- .fifo_size = 32,
-};
-
-struct ep93xx_runtime_data
-{
- struct ep93xx_dma_m2p_client cl;
- struct ep93xx_pcm_dma_params *params;
- int pointer_bytes;
- struct tasklet_struct period_tasklet;
- int periods;
- struct ep93xx_dma_buffer buf[32];
-};
-
-static void ep93xx_pcm_period_elapsed(unsigned long data)
-{
- struct snd_pcm_substream *substream = (struct snd_pcm_substream *)data;
- snd_pcm_period_elapsed(substream);
-}
-
-static void ep93xx_pcm_buffer_started(void *cookie,
- struct ep93xx_dma_buffer *buf)
-{
-}
-
-static void ep93xx_pcm_buffer_finished(void *cookie,
- struct ep93xx_dma_buffer *buf,
- int bytes, int error)
-{
- struct snd_pcm_substream *substream = cookie;
- struct ep93xx_runtime_data *rtd = substream->runtime->private_data;
-
- if (buf == rtd->buf + rtd->periods - 1)
- rtd->pointer_bytes = 0;
- else
- rtd->pointer_bytes += buf->size;
-
- if (!error) {
- ep93xx_dma_m2p_submit_recursive(&rtd->cl, buf);
- tasklet_schedule(&rtd->period_tasklet);
- } else {
- snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
- }
-}
-
-static int ep93xx_pcm_open(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *soc_rtd = substream->private_data;
- struct snd_soc_dai *cpu_dai = soc_rtd->cpu_dai;
- struct ep93xx_pcm_dma_params *dma_params;
- struct ep93xx_runtime_data *rtd;
- int ret;
-
- dma_params = snd_soc_dai_get_dma_data(cpu_dai, substream);
- snd_soc_set_runtime_hwparams(substream, &ep93xx_pcm_hardware);
-
- rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
- if (!rtd)
- return -ENOMEM;
-
- memset(&rtd->period_tasklet, 0, sizeof(rtd->period_tasklet));
- rtd->period_tasklet.func = ep93xx_pcm_period_elapsed;
- rtd->period_tasklet.data = (unsigned long)substream;
-
- rtd->cl.name = dma_params->name;
- rtd->cl.flags = dma_params->dma_port | EP93XX_DMA_M2P_IGNORE_ERROR |
- ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
- EP93XX_DMA_M2P_TX : EP93XX_DMA_M2P_RX);
- rtd->cl.cookie = substream;
- rtd->cl.buffer_started = ep93xx_pcm_buffer_started;
- rtd->cl.buffer_finished = ep93xx_pcm_buffer_finished;
- ret = ep93xx_dma_m2p_client_register(&rtd->cl);
- if (ret < 0) {
- kfree(rtd);
- return ret;
- }
-
- substream->runtime->private_data = rtd;
- return 0;
-}
-
-static int ep93xx_pcm_close(struct snd_pcm_substream *substream)
-{
- struct ep93xx_runtime_data *rtd = substream->runtime->private_data;
-
- ep93xx_dma_m2p_client_unregister(&rtd->cl);
- kfree(rtd);
- return 0;
-}
-
-static int ep93xx_pcm_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct ep93xx_runtime_data *rtd = runtime->private_data;
- size_t totsize = params_buffer_bytes(params);
- size_t period = params_period_bytes(params);
- int i;
-
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
- runtime->dma_bytes = totsize;
-
- rtd->periods = (totsize + period - 1) / period;
- for (i = 0; i < rtd->periods; i++) {
- rtd->buf[i].bus_addr = runtime->dma_addr + (i * period);
- rtd->buf[i].size = period;
- if ((i + 1) * period > totsize)
- rtd->buf[i].size = totsize - (i * period);
- }
-
- return 0;
-}
-
-static int ep93xx_pcm_hw_free(struct snd_pcm_substream *substream)
-{
- snd_pcm_set_runtime_buffer(substream, NULL);
- return 0;
-}
-
-static int ep93xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
-{
- struct ep93xx_runtime_data *rtd = substream->runtime->private_data;
- int ret;
- int i;
-
- ret = 0;
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_RESUME:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- rtd->pointer_bytes = 0;
- for (i = 0; i < rtd->periods; i++)
- ep93xx_dma_m2p_submit(&rtd->cl, rtd->buf + i);
- break;
-
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- ep93xx_dma_m2p_flush(&rtd->cl);
- break;
-
- default:
- ret = -EINVAL;
- break;
- }
-
- return ret;
-}
-
-static snd_pcm_uframes_t ep93xx_pcm_pointer(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct ep93xx_runtime_data *rtd = substream->runtime->private_data;
-
- /* FIXME: implement this with sub-period granularity */
- return bytes_to_frames(runtime, rtd->pointer_bytes);
-}
-
-static int ep93xx_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 ep93xx_pcm_ops = {
- .open = ep93xx_pcm_open,
- .close = ep93xx_pcm_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = ep93xx_pcm_hw_params,
- .hw_free = ep93xx_pcm_hw_free,
- .trigger = ep93xx_pcm_trigger,
- .pointer = ep93xx_pcm_pointer,
- .mmap = ep93xx_pcm_mmap,
-};
-
-static int ep93xx_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 = ep93xx_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_writecombine(pcm->card->dev, size,
- &buf->addr, GFP_KERNEL);
- buf->bytes = size;
-
- return (buf->area == NULL) ? -ENOMEM : 0;
-}
-
-static void ep93xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
-{
- struct snd_pcm_substream *substream;
- struct snd_dma_buffer *buf;
- int stream;
-
- for (stream = 0; stream < 2; stream++) {
- substream = pcm->streams[stream].substream;
- if (!substream)
- continue;
-
- buf = &substream->dma_buffer;
- if (!buf->area)
- continue;
-
- dma_free_writecombine(pcm->card->dev, buf->bytes, buf->area,
- buf->addr);
- buf->area = NULL;
- }
-}
-
-static u64 ep93xx_pcm_dmamask = 0xffffffff;
-
-static int ep93xx_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
- struct snd_pcm *pcm)
-{
- int ret = 0;
-
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &ep93xx_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = 0xffffffff;
-
- if (dai->driver->playback.channels_min) {
- ret = ep93xx_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_PLAYBACK);
- if (ret)
- return ret;
- }
-
- if (dai->driver->capture.channels_min) {
- ret = ep93xx_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_CAPTURE);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
-static struct snd_soc_platform_driver ep93xx_soc_platform = {
- .ops = &ep93xx_pcm_ops,
- .pcm_new = &ep93xx_pcm_new,
- .pcm_free = &ep93xx_pcm_free_dma_buffers,
-};
-
-static int __devinit ep93xx_soc_platform_probe(struct platform_device *pdev)
-{
- return snd_soc_register_platform(&pdev->dev, &ep93xx_soc_platform);
-}
-
-static int __devexit ep93xx_soc_platform_remove(struct platform_device *pdev)
-{
- snd_soc_unregister_platform(&pdev->dev);
- return 0;
-}
-
-static struct platform_driver ep93xx_pcm_driver = {
- .driver = {
- .name = "ep93xx-pcm-audio",
- .owner = THIS_MODULE,
- },
-
- .probe = ep93xx_soc_platform_probe,
- .remove = __devexit_p(ep93xx_soc_platform_remove),
-};
-
-static int __init ep93xx_soc_platform_init(void)
-{
- return platform_driver_register(&ep93xx_pcm_driver);
-}
-
-static void __exit ep93xx_soc_platform_exit(void)
-{
- platform_driver_unregister(&ep93xx_pcm_driver);
-}
-
-module_init(ep93xx_soc_platform_init);
-module_exit(ep93xx_soc_platform_exit);
-
-MODULE_AUTHOR("Ryan Mallon <ryan@bluewatersys.com>");
-MODULE_DESCRIPTION("EP93xx ALSA PCM interface");
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-03 21:37:34 +0000