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Diffstat (limited to 'sound/soc/imx/mx1_mx2-pcm.c')
-rw-r--r--sound/soc/imx/mx1_mx2-pcm.c488
1 files changed, 0 insertions, 488 deletions
diff --git a/sound/soc/imx/mx1_mx2-pcm.c b/sound/soc/imx/mx1_mx2-pcm.c
deleted file mode 100644
index bffffcd5ff3..00000000000
--- a/sound/soc/imx/mx1_mx2-pcm.c
+++ /dev/null
@@ -1,488 +0,0 @@
-/*
- * mx1_mx2-pcm.c -- ALSA SoC interface for Freescale i.MX1x, i.MX2x CPUs
- *
- * Copyright 2009 Vista Silicon S.L.
- * Author: Javier Martin
- * javier.martin@vista-silicon.com
- *
- * Based on mxc-pcm.c by Liam Girdwood.
- *
- * 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/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/dma.h>
-#include <mach/hardware.h>
-#include <mach/dma-mx1-mx2.h>
-
-#include "mx1_mx2-pcm.h"
-
-
-static const struct snd_pcm_hardware mx1_mx2_pcm_hardware = {
- .info = (SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_BLOCK_TRANSFER |
- SNDRV_PCM_INFO_MMAP |
- SNDRV_PCM_INFO_MMAP_VALID),
- .formats = SNDRV_PCM_FMTBIT_S16_LE,
- .buffer_bytes_max = 32 * 1024,
- .period_bytes_min = 64,
- .period_bytes_max = 8 * 1024,
- .periods_min = 2,
- .periods_max = 255,
- .fifo_size = 0,
-};
-
-struct mx1_mx2_runtime_data {
- int dma_ch;
- int active;
- unsigned int period;
- unsigned int periods;
- int tx_spin;
- spinlock_t dma_lock;
- struct mx1_mx2_pcm_dma_params *dma_params;
-};
-
-
-/**
- * This function stops the current dma transfer for playback
- * and clears the dma pointers.
- *
- * @param substream pointer to the structure of the current stream.
- *
- */
-static int audio_stop_dma(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mx1_mx2_runtime_data *prtd = runtime->private_data;
- unsigned long flags;
-
- spin_lock_irqsave(&prtd->dma_lock, flags);
-
- pr_debug("%s\n", __func__);
-
- prtd->active = 0;
- prtd->period = 0;
- prtd->periods = 0;
-
- /* this stops the dma channel and clears the buffer ptrs */
-
- imx_dma_disable(prtd->dma_ch);
-
- spin_unlock_irqrestore(&prtd->dma_lock, flags);
-
- return 0;
-}
-
-/**
- * This function is called whenever a new audio block needs to be
- * transferred to the codec. The function receives the address and the size
- * of the new block and start a new DMA transfer.
- *
- * @param substream pointer to the structure of the current stream.
- *
- */
-static int dma_new_period(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mx1_mx2_runtime_data *prtd = runtime->private_data;
- unsigned int dma_size;
- unsigned int offset;
- int ret = 0;
- dma_addr_t mem_addr;
- unsigned int dev_addr;
-
- if (prtd->active) {
- dma_size = frames_to_bytes(runtime, runtime->period_size);
- offset = dma_size * prtd->period;
-
- pr_debug("%s: period (%d) out of (%d)\n", __func__,
- prtd->period,
- runtime->periods);
- pr_debug("period_size %d frames\n offset %d bytes\n",
- (unsigned int)runtime->period_size,
- offset);
- pr_debug("dma_size %d bytes\n", dma_size);
-
- snd_BUG_ON(dma_size > mx1_mx2_pcm_hardware.period_bytes_max);
-
- mem_addr = (dma_addr_t)(runtime->dma_addr + offset);
- dev_addr = prtd->dma_params->per_address;
- pr_debug("%s: mem_addr is %x\n dev_addr is %x\n",
- __func__, mem_addr, dev_addr);
-
- ret = imx_dma_setup_single(prtd->dma_ch, mem_addr,
- dma_size, dev_addr,
- prtd->dma_params->transfer_type);
- if (ret < 0) {
- printk(KERN_ERR "Error %d configuring DMA\n", ret);
- return ret;
- }
- imx_dma_enable(prtd->dma_ch);
-
- pr_debug("%s: transfer enabled\nmem_addr = %x\n",
- __func__, (unsigned int) mem_addr);
- pr_debug("dev_addr = %x\ndma_size = %d\n",
- (unsigned int) dev_addr, dma_size);
-
- prtd->tx_spin = 1; /* FGA little trick to retrieve DMA pos */
- prtd->period++;
- prtd->period %= runtime->periods;
- }
- return ret;
-}
-
-
-/**
- * This is a callback which will be called
- * when a TX transfer finishes. The call occurs
- * in interrupt context.
- *
- * @param dat pointer to the structure of the current stream.
- *
- */
-static void audio_dma_irq(int channel, void *data)
-{
- struct snd_pcm_substream *substream;
- struct snd_pcm_runtime *runtime;
- struct mx1_mx2_runtime_data *prtd;
- unsigned int dma_size;
- unsigned int previous_period;
- unsigned int offset;
-
- substream = data;
- runtime = substream->runtime;
- prtd = runtime->private_data;
- previous_period = prtd->periods;
- dma_size = frames_to_bytes(runtime, runtime->period_size);
- offset = dma_size * previous_period;
-
- prtd->tx_spin = 0;
- prtd->periods++;
- prtd->periods %= runtime->periods;
-
- pr_debug("%s: irq per %d offset %x\n", __func__, prtd->periods, offset);
-
- /*
- * If we are getting a callback for an active stream then we inform
- * the PCM middle layer we've finished a period
- */
- if (prtd->active)
- snd_pcm_period_elapsed(substream);
-
- /*
- * Trig next DMA transfer
- */
- dma_new_period(substream);
-}
-
-/**
- * This function configures the hardware to allow audio
- * playback operations. It is called by ALSA framework.
- *
- * @param substream pointer to the structure of the current stream.
- *
- * @return 0 on success, -1 otherwise.
- */
-static int
-snd_mx1_mx2_prepare(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mx1_mx2_runtime_data *prtd = runtime->private_data;
-
- prtd->period = 0;
- prtd->periods = 0;
-
- return 0;
-}
-
-static int mx1_mx2_pcm_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *hw_params)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- int ret;
-
- ret = snd_pcm_lib_malloc_pages(substream,
- params_buffer_bytes(hw_params));
- if (ret < 0) {
- printk(KERN_ERR "%s: Error %d failed to malloc pcm pages \n",
- __func__, ret);
- return ret;
- }
-
- pr_debug("%s: snd_imx1_mx2_audio_hw_params runtime->dma_addr 0x(%x)\n",
- __func__, (unsigned int)runtime->dma_addr);
- pr_debug("%s: snd_imx1_mx2_audio_hw_params runtime->dma_area 0x(%x)\n",
- __func__, (unsigned int)runtime->dma_area);
- pr_debug("%s: snd_imx1_mx2_audio_hw_params runtime->dma_bytes 0x(%x)\n",
- __func__, (unsigned int)runtime->dma_bytes);
-
- return ret;
-}
-
-static int mx1_mx2_pcm_hw_free(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mx1_mx2_runtime_data *prtd = runtime->private_data;
-
- imx_dma_free(prtd->dma_ch);
-
- snd_pcm_lib_free_pages(substream);
-
- return 0;
-}
-
-static int mx1_mx2_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
-{
- struct mx1_mx2_runtime_data *prtd = substream->runtime->private_data;
- int ret = 0;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- prtd->tx_spin = 0;
- /* requested stream startup */
- prtd->active = 1;
- pr_debug("%s: starting dma_new_period\n", __func__);
- ret = dma_new_period(substream);
- break;
- case SNDRV_PCM_TRIGGER_STOP:
- /* requested stream shutdown */
- pr_debug("%s: stopping dma transfer\n", __func__);
- ret = audio_stop_dma(substream);
- break;
- default:
- ret = -EINVAL;
- break;
- }
-
- return ret;
-}
-
-static snd_pcm_uframes_t
-mx1_mx2_pcm_pointer(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mx1_mx2_runtime_data *prtd = runtime->private_data;
- unsigned int offset = 0;
-
- /* tx_spin value is used here to check if a transfer is active */
- if (prtd->tx_spin) {
- offset = (runtime->period_size * (prtd->periods)) +
- (runtime->period_size >> 1);
- if (offset >= runtime->buffer_size)
- offset = runtime->period_size >> 1;
- } else {
- offset = (runtime->period_size * (prtd->periods));
- if (offset >= runtime->buffer_size)
- offset = 0;
- }
- pr_debug("%s: pointer offset %x\n", __func__, offset);
-
- return offset;
-}
-
-static int mx1_mx2_pcm_open(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mx1_mx2_runtime_data *prtd;
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct mx1_mx2_pcm_dma_params *dma_data = rtd->dai->cpu_dai->dma_data;
- int ret;
-
- snd_soc_set_runtime_hwparams(substream, &mx1_mx2_pcm_hardware);
-
- ret = snd_pcm_hw_constraint_integer(runtime,
- SNDRV_PCM_HW_PARAM_PERIODS);
- if (ret < 0)
- return ret;
-
- prtd = kzalloc(sizeof(struct mx1_mx2_runtime_data), GFP_KERNEL);
- if (prtd == NULL) {
- ret = -ENOMEM;
- goto out;
- }
-
- runtime->private_data = prtd;
-
- if (!dma_data)
- return -ENODEV;
-
- prtd->dma_params = dma_data;
-
- pr_debug("%s: Requesting dma channel (%s)\n", __func__,
- prtd->dma_params->name);
- ret = imx_dma_request_by_prio(prtd->dma_params->name, DMA_PRIO_HIGH);
- if (ret < 0) {
- printk(KERN_ERR "Error %d requesting dma channel\n", ret);
- return ret;
- }
- prtd->dma_ch = ret;
- imx_dma_config_burstlen(prtd->dma_ch,
- prtd->dma_params->watermark_level);
-
- ret = imx_dma_config_channel(prtd->dma_ch,
- prtd->dma_params->per_config,
- prtd->dma_params->mem_config,
- prtd->dma_params->event_id, 0);
-
- if (ret) {
- pr_debug(KERN_ERR "Error %d configuring dma channel %d\n",
- ret, prtd->dma_ch);
- return ret;
- }
-
- pr_debug("%s: Setting tx dma callback function\n", __func__);
- ret = imx_dma_setup_handlers(prtd->dma_ch,
- audio_dma_irq, NULL,
- (void *)substream);
- if (ret < 0) {
- printk(KERN_ERR "Error %d setting dma callback function\n", ret);
- return ret;
- }
- return 0;
-
- out:
- return ret;
-}
-
-static int mx1_mx2_pcm_close(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct mx1_mx2_runtime_data *prtd = runtime->private_data;
-
- kfree(prtd);
-
- return 0;
-}
-
-static int mx1_mx2_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 mx1_mx2_pcm_ops = {
- .open = mx1_mx2_pcm_open,
- .close = mx1_mx2_pcm_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = mx1_mx2_pcm_hw_params,
- .hw_free = mx1_mx2_pcm_hw_free,
- .prepare = snd_mx1_mx2_prepare,
- .trigger = mx1_mx2_pcm_trigger,
- .pointer = mx1_mx2_pcm_pointer,
- .mmap = mx1_mx2_pcm_mmap,
-};
-
-static u64 mx1_mx2_pcm_dmamask = 0xffffffff;
-
-static int mx1_mx2_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 = mx1_mx2_pcm_hardware.buffer_bytes_max;
- buf->dev.type = SNDRV_DMA_TYPE_DEV;
- buf->dev.dev = pcm->card->dev;
- buf->private_data = NULL;
-
- /* Reserve uncached-buffered memory area for DMA */
- buf->area = dma_alloc_writecombine(pcm->card->dev, size,
- &buf->addr, GFP_KERNEL);
-
- pr_debug("%s: preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
- __func__, (void *) buf->area, (void *) buf->addr, size);
-
- if (!buf->area)
- return -ENOMEM;
-
- buf->bytes = size;
- return 0;
-}
-
-static void mx1_mx2_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 int mx1_mx2_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 = &mx1_mx2_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = 0xffffffff;
-
- if (dai->playback.channels_min) {
- ret = mx1_mx2_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_PLAYBACK);
- pr_debug("%s: preallocate playback buffer\n", __func__);
- if (ret)
- goto out;
- }
-
- if (dai->capture.channels_min) {
- ret = mx1_mx2_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_CAPTURE);
- pr_debug("%s: preallocate capture buffer\n", __func__);
- if (ret)
- goto out;
- }
- out:
- return ret;
-}
-
-struct snd_soc_platform mx1_mx2_soc_platform = {
- .name = "mx1_mx2-audio",
- .pcm_ops = &mx1_mx2_pcm_ops,
- .pcm_new = mx1_mx2_pcm_new,
- .pcm_free = mx1_mx2_pcm_free_dma_buffers,
-};
-EXPORT_SYMBOL_GPL(mx1_mx2_soc_platform);
-
-static int __init mx1_mx2_soc_platform_init(void)
-{
- return snd_soc_register_platform(&mx1_mx2_soc_platform);
-}
-module_init(mx1_mx2_soc_platform_init);
-
-static void __exit mx1_mx2_soc_platform_exit(void)
-{
- snd_soc_unregister_platform(&mx1_mx2_soc_platform);
-}
-module_exit(mx1_mx2_soc_platform_exit);
-
-MODULE_AUTHOR("Javier Martin, javier.martin@vista-silicon.com");
-MODULE_DESCRIPTION("Freescale i.MX2x, i.MX1x PCM DMA module");
-MODULE_LICENSE("GPL");