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Diffstat (limited to 'sound/soc/at91/at91-pcm.c')
-rw-r--r--sound/soc/at91/at91-pcm.c434
1 files changed, 0 insertions, 434 deletions
diff --git a/sound/soc/at91/at91-pcm.c b/sound/soc/at91/at91-pcm.c
deleted file mode 100644
index 7ab48bd25e4..00000000000
--- a/sound/soc/at91/at91-pcm.c
+++ /dev/null
@@ -1,434 +0,0 @@
-/*
- * at91-pcm.c -- ALSA PCM interface for the Atmel AT91 SoC
- *
- * Author: Frank Mandarino <fmandarino@endrelia.com>
- * Endrelia Technologies Inc.
- * Created: Mar 3, 2006
- *
- * Based on pxa2xx-pcm.c by:
- *
- * Author: Nicolas Pitre
- * Created: Nov 30, 2004
- * Copyright: (C) 2004 MontaVista Software, Inc.
- *
- * 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 <linux/atmel_pdc.h>
-
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/soc.h>
-
-#include <mach/hardware.h>
-#include <mach/at91_ssc.h>
-
-#include "at91-pcm.h"
-
-#if 0
-#define DBG(x...) printk(KERN_INFO "at91-pcm: " x)
-#else
-#define DBG(x...)
-#endif
-
-static const struct snd_pcm_hardware at91_pcm_hardware = {
- .info = SNDRV_PCM_INFO_MMAP |
- SNDRV_PCM_INFO_MMAP_VALID |
- SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_PAUSE,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,
- .period_bytes_min = 32,
- .period_bytes_max = 8192,
- .periods_min = 2,
- .periods_max = 1024,
- .buffer_bytes_max = 32 * 1024,
-};
-
-struct at91_runtime_data {
- struct at91_pcm_dma_params *params;
- dma_addr_t dma_buffer; /* physical address of dma buffer */
- dma_addr_t dma_buffer_end; /* first address beyond DMA buffer */
- size_t period_size;
- dma_addr_t period_ptr; /* physical address of next period */
- u32 pdc_xpr_save; /* PDC register save */
- u32 pdc_xcr_save;
- u32 pdc_xnpr_save;
- u32 pdc_xncr_save;
-};
-
-static void at91_pcm_dma_irq(u32 ssc_sr,
- struct snd_pcm_substream *substream)
-{
- struct at91_runtime_data *prtd = substream->runtime->private_data;
- struct at91_pcm_dma_params *params = prtd->params;
- static int count = 0;
-
- count++;
-
- if (ssc_sr & params->mask->ssc_endbuf) {
-
- printk(KERN_WARNING
- "at91-pcm: buffer %s on %s (SSC_SR=%#x, count=%d)\n",
- substream->stream == SNDRV_PCM_STREAM_PLAYBACK
- ? "underrun" : "overrun",
- params->name, ssc_sr, count);
-
- /* re-start the PDC */
- at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_disable);
-
- prtd->period_ptr += prtd->period_size;
- if (prtd->period_ptr >= prtd->dma_buffer_end) {
- prtd->period_ptr = prtd->dma_buffer;
- }
-
- at91_ssc_write(params->ssc_base + params->pdc->xpr, prtd->period_ptr);
- at91_ssc_write(params->ssc_base + params->pdc->xcr,
- prtd->period_size / params->pdc_xfer_size);
-
- at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_enable);
- }
-
- if (ssc_sr & params->mask->ssc_endx) {
-
- /* Load the PDC next pointer and counter registers */
- prtd->period_ptr += prtd->period_size;
- if (prtd->period_ptr >= prtd->dma_buffer_end) {
- prtd->period_ptr = prtd->dma_buffer;
- }
- at91_ssc_write(params->ssc_base + params->pdc->xnpr,
- prtd->period_ptr);
- at91_ssc_write(params->ssc_base + params->pdc->xncr,
- prtd->period_size / params->pdc_xfer_size);
- }
-
- snd_pcm_period_elapsed(substream);
-}
-
-static int at91_pcm_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct at91_runtime_data *prtd = runtime->private_data;
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
-
- /* this may get called several times by oss emulation
- * with different params */
-
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
- runtime->dma_bytes = params_buffer_bytes(params);
-
- prtd->params = rtd->dai->cpu_dai->dma_data;
- prtd->params->dma_intr_handler = at91_pcm_dma_irq;
-
- prtd->dma_buffer = runtime->dma_addr;
- prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
- prtd->period_size = params_period_bytes(params);
-
- DBG("hw_params: DMA for %s initialized (dma_bytes=%d, period_size=%d)\n",
- prtd->params->name, runtime->dma_bytes, prtd->period_size);
- return 0;
-}
-
-static int at91_pcm_hw_free(struct snd_pcm_substream *substream)
-{
- struct at91_runtime_data *prtd = substream->runtime->private_data;
- struct at91_pcm_dma_params *params = prtd->params;
-
- if (params != NULL) {
- at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_disable);
- prtd->params->dma_intr_handler = NULL;
- }
-
- return 0;
-}
-
-static int at91_pcm_prepare(struct snd_pcm_substream *substream)
-{
- struct at91_runtime_data *prtd = substream->runtime->private_data;
- struct at91_pcm_dma_params *params = prtd->params;
-
- at91_ssc_write(params->ssc_base + AT91_SSC_IDR,
- params->mask->ssc_endx | params->mask->ssc_endbuf);
-
- at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_disable);
- return 0;
-}
-
-static int at91_pcm_trigger(struct snd_pcm_substream *substream,
- int cmd)
-{
- struct at91_runtime_data *prtd = substream->runtime->private_data;
- struct at91_pcm_dma_params *params = prtd->params;
- int ret = 0;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- prtd->period_ptr = prtd->dma_buffer;
-
- at91_ssc_write(params->ssc_base + params->pdc->xpr, prtd->period_ptr);
- at91_ssc_write(params->ssc_base + params->pdc->xcr,
- prtd->period_size / params->pdc_xfer_size);
-
- prtd->period_ptr += prtd->period_size;
- at91_ssc_write(params->ssc_base + params->pdc->xnpr, prtd->period_ptr);
- at91_ssc_write(params->ssc_base + params->pdc->xncr,
- prtd->period_size / params->pdc_xfer_size);
-
- DBG("trigger: period_ptr=%lx, xpr=%lx, xcr=%ld, xnpr=%lx, xncr=%ld\n",
- (unsigned long) prtd->period_ptr,
- at91_ssc_read(params->ssc_base + params->pdc->xpr),
- at91_ssc_read(params->ssc_base + params->pdc->xcr),
- at91_ssc_read(params->ssc_base + params->pdc->xnpr),
- at91_ssc_read(params->ssc_base + params->pdc->xncr));
-
- at91_ssc_write(params->ssc_base + AT91_SSC_IER,
- params->mask->ssc_endx | params->mask->ssc_endbuf);
-
- at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR,
- params->mask->pdc_enable);
-
- DBG("sr=%lx imr=%lx\n",
- at91_ssc_read(params->ssc_base + AT91_SSC_SR),
- at91_ssc_read(params->ssc_base + AT91_SSC_IMR));
- break;
-
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_disable);
- break;
-
- case SNDRV_PCM_TRIGGER_RESUME:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_enable);
- break;
-
- default:
- ret = -EINVAL;
- }
-
- return ret;
-}
-
-static snd_pcm_uframes_t at91_pcm_pointer(
- struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct at91_runtime_data *prtd = runtime->private_data;
- struct at91_pcm_dma_params *params = prtd->params;
- dma_addr_t ptr;
- snd_pcm_uframes_t x;
-
- ptr = (dma_addr_t) at91_ssc_read(params->ssc_base + params->pdc->xpr);
- x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);
-
- if (x == runtime->buffer_size)
- x = 0;
- return x;
-}
-
-static int at91_pcm_open(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct at91_runtime_data *prtd;
- int ret = 0;
-
- snd_soc_set_runtime_hwparams(substream, &at91_pcm_hardware);
-
- /* 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)
- goto out;
-
- prtd = kzalloc(sizeof(struct at91_runtime_data), GFP_KERNEL);
- if (prtd == NULL) {
- ret = -ENOMEM;
- goto out;
- }
- runtime->private_data = prtd;
-
- out:
- return ret;
-}
-
-static int at91_pcm_close(struct snd_pcm_substream *substream)
-{
- struct at91_runtime_data *prtd = substream->runtime->private_data;
-
- kfree(prtd);
- return 0;
-}
-
-static int at91_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);
-}
-
-struct snd_pcm_ops at91_pcm_ops = {
- .open = at91_pcm_open,
- .close = at91_pcm_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = at91_pcm_hw_params,
- .hw_free = at91_pcm_hw_free,
- .prepare = at91_pcm_prepare,
- .trigger = at91_pcm_trigger,
- .pointer = at91_pcm_pointer,
- .mmap = at91_pcm_mmap,
-};
-
-static int at91_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 = at91_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);
-
- DBG("preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
- (void *) buf->area,
- (void *) buf->addr,
- size);
-
- if (!buf->area)
- return -ENOMEM;
-
- buf->bytes = size;
- return 0;
-}
-
-static u64 at91_pcm_dmamask = 0xffffffff;
-
-static int at91_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 = &at91_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = 0xffffffff;
-
- if (dai->playback.channels_min) {
- ret = at91_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_PLAYBACK);
- if (ret)
- goto out;
- }
-
- if (dai->capture.channels_min) {
- ret = at91_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_CAPTURE);
- if (ret)
- goto out;
- }
- out:
- return ret;
-}
-
-static void at91_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;
- }
-}
-
-#ifdef CONFIG_PM
-static int at91_pcm_suspend(struct platform_device *pdev,
- struct snd_soc_dai *dai)
-{
- struct snd_pcm_runtime *runtime = dai->runtime;
- struct at91_runtime_data *prtd;
- struct at91_pcm_dma_params *params;
-
- if (!runtime)
- return 0;
-
- prtd = runtime->private_data;
- params = prtd->params;
-
- /* disable the PDC and save the PDC registers */
-
- at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_disable);
-
- prtd->pdc_xpr_save = at91_ssc_read(params->ssc_base + params->pdc->xpr);
- prtd->pdc_xcr_save = at91_ssc_read(params->ssc_base + params->pdc->xcr);
- prtd->pdc_xnpr_save = at91_ssc_read(params->ssc_base + params->pdc->xnpr);
- prtd->pdc_xncr_save = at91_ssc_read(params->ssc_base + params->pdc->xncr);
-
- return 0;
-}
-
-static int at91_pcm_resume(struct platform_device *pdev,
- struct snd_soc_dai *dai)
-{
- struct snd_pcm_runtime *runtime = dai->runtime;
- struct at91_runtime_data *prtd;
- struct at91_pcm_dma_params *params;
-
- if (!runtime)
- return 0;
-
- prtd = runtime->private_data;
- params = prtd->params;
-
- /* restore the PDC registers and enable the PDC */
- at91_ssc_write(params->ssc_base + params->pdc->xpr, prtd->pdc_xpr_save);
- at91_ssc_write(params->ssc_base + params->pdc->xcr, prtd->pdc_xcr_save);
- at91_ssc_write(params->ssc_base + params->pdc->xnpr, prtd->pdc_xnpr_save);
- at91_ssc_write(params->ssc_base + params->pdc->xncr, prtd->pdc_xncr_save);
-
- at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_enable);
- return 0;
-}
-#else
-#define at91_pcm_suspend NULL
-#define at91_pcm_resume NULL
-#endif
-
-struct snd_soc_platform at91_soc_platform = {
- .name = "at91-audio",
- .pcm_ops = &at91_pcm_ops,
- .pcm_new = at91_pcm_new,
- .pcm_free = at91_pcm_free_dma_buffers,
- .suspend = at91_pcm_suspend,
- .resume = at91_pcm_resume,
-};
-
-EXPORT_SYMBOL_GPL(at91_soc_platform);
-
-MODULE_AUTHOR("Frank Mandarino <fmandarino@endrelia.com>");
-MODULE_DESCRIPTION("Atmel AT91 PCM module");
-MODULE_LICENSE("GPL");