cs46xx_lib.c

来自「优龙2410linux2.6.8内核源代码」· C语言 代码 · 共 2,248 行 · 第 1/5 页

	.info =			(SNDRV_PCM_INFO_MMAP |
				 SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
				 SNDRV_PCM_INFO_RESUME),
	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
	.rate_min =		5500,
	.rate_max =		48000,
	.channels_min =		2,
	.channels_max =		2,
	.buffer_bytes_max =	(256 * 1024),
	.period_bytes_min =	CS46XX_MIN_PERIOD_SIZE,
	.period_bytes_max =	CS46XX_MAX_PERIOD_SIZE,
	.periods_min =		CS46XX_FRAGS,
	.periods_max =		1024,
	.fifo_size =		0,
};

#ifdef CONFIG_SND_CS46XX_NEW_DSP

static unsigned int period_sizes[] = { 32, 64, 128, 256, 512, 1024, 2048 };

#define PERIOD_SIZES sizeof(period_sizes) / sizeof(period_sizes[0])

static snd_pcm_hw_constraint_list_t hw_constraints_period_sizes = {
	.count = PERIOD_SIZES,
	.list = period_sizes,
	.mask = 0
};

#endif

static void snd_cs46xx_pcm_free_substream(snd_pcm_runtime_t *runtime)
{
	cs46xx_pcm_t * cpcm = snd_magic_cast(cs46xx_pcm_t, runtime->private_data, return);
	
	if (cpcm)
		snd_magic_kfree(cpcm);
}

static int _cs46xx_playback_open_channel (snd_pcm_substream_t * substream,int pcm_channel_id)
{
	cs46xx_t *chip = snd_pcm_substream_chip(substream);
	cs46xx_pcm_t * cpcm;
	snd_pcm_runtime_t *runtime = substream->runtime;

	cpcm = snd_magic_kcalloc(cs46xx_pcm_t, 0, GFP_KERNEL);
	if (cpcm == NULL)
		return -ENOMEM;
	if (snd_dma_alloc_pages(&chip->dma_dev, PAGE_SIZE, &cpcm->hw_buf) < 0) {
		snd_magic_kfree(cpcm);
		return -ENOMEM;
	}

	runtime->hw = snd_cs46xx_playback;
	runtime->private_data = cpcm;
	runtime->private_free = snd_cs46xx_pcm_free_substream;

	cpcm->substream = substream;
#ifdef CONFIG_SND_CS46XX_NEW_DSP
	down (&chip->spos_mutex);
	cpcm->pcm_channel = NULL; 
	cpcm->pcm_channel_id = pcm_channel_id;


	snd_pcm_hw_constraint_list(runtime, 0,
				   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 
				   &hw_constraints_period_sizes);

	up (&chip->spos_mutex);
#else
	chip->playback_pcm = cpcm; /* HACK */
#endif

	if (chip->accept_valid)
		substream->runtime->hw.info |= SNDRV_PCM_INFO_MMAP_VALID;
	chip->active_ctrl(chip, 1);

	return 0;
}

static int snd_cs46xx_playback_open(snd_pcm_substream_t * substream)
{
	snd_printdd("open front channel\n");
	return _cs46xx_playback_open_channel(substream,DSP_PCM_MAIN_CHANNEL);
}

#ifdef CONFIG_SND_CS46XX_NEW_DSP
static int snd_cs46xx_playback_open_rear(snd_pcm_substream_t * substream)
{
	snd_printdd("open rear channel\n");

	return _cs46xx_playback_open_channel(substream,DSP_PCM_REAR_CHANNEL);
}

static int snd_cs46xx_playback_open_clfe(snd_pcm_substream_t * substream)
{
	snd_printdd("open center - LFE channel\n");

	return _cs46xx_playback_open_channel(substream,DSP_PCM_CENTER_LFE_CHANNEL);
}

static int snd_cs46xx_playback_open_iec958(snd_pcm_substream_t * substream)
{
	cs46xx_t *chip = snd_pcm_substream_chip(substream);

	snd_printdd("open raw iec958 channel\n");

	down (&chip->spos_mutex);
	cs46xx_iec958_pre_open (chip);
	up (&chip->spos_mutex);

	return _cs46xx_playback_open_channel(substream,DSP_IEC958_CHANNEL);
}

static int snd_cs46xx_playback_close(snd_pcm_substream_t * substream);

static int snd_cs46xx_playback_close_iec958(snd_pcm_substream_t * substream)
{
	int err;
	cs46xx_t *chip = snd_pcm_substream_chip(substream);
  
	snd_printdd("close raw iec958 channel\n");

	err = snd_cs46xx_playback_close(substream);

	down (&chip->spos_mutex);
	cs46xx_iec958_post_close (chip);
	up (&chip->spos_mutex);

	return err;
}
#endif

static int snd_cs46xx_capture_open(snd_pcm_substream_t * substream)
{
	cs46xx_t *chip = snd_pcm_substream_chip(substream);

	if (snd_dma_alloc_pages(&chip->dma_dev, PAGE_SIZE, &chip->capt.hw_buf) < 0)
		return -ENOMEM;
	chip->capt.substream = substream;
	substream->runtime->hw = snd_cs46xx_capture;

	if (chip->accept_valid)
		substream->runtime->hw.info |= SNDRV_PCM_INFO_MMAP_VALID;

	chip->active_ctrl(chip, 1);

#ifdef CONFIG_SND_CS46XX_NEW_DSP
	snd_pcm_hw_constraint_list(substream->runtime, 0,
				   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 
				   &hw_constraints_period_sizes);
#endif
	return 0;
}

static int snd_cs46xx_playback_close(snd_pcm_substream_t * substream)
{
	cs46xx_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	cs46xx_pcm_t * cpcm;

	cpcm = snd_magic_cast(cs46xx_pcm_t, runtime->private_data, return -ENXIO);

	/* when playback_open fails, then cpcm can be NULL */
	if (!cpcm) return -ENXIO;

#ifdef CONFIG_SND_CS46XX_NEW_DSP
	down (&chip->spos_mutex);
	if (cpcm->pcm_channel) {
		cs46xx_dsp_destroy_pcm_channel(chip,cpcm->pcm_channel);
		cpcm->pcm_channel = NULL;
	}
	up (&chip->spos_mutex);
#else
	chip->playback_pcm = NULL;
#endif

	cpcm->substream = NULL;
	snd_dma_free_pages(&chip->dma_dev, &cpcm->hw_buf);
	chip->active_ctrl(chip, -1);

	return 0;
}

static int snd_cs46xx_capture_close(snd_pcm_substream_t * substream)
{
	cs46xx_t *chip = snd_pcm_substream_chip(substream);

	chip->capt.substream = NULL;
	snd_dma_free_pages(&chip->dma_dev, &chip->capt.hw_buf);
	chip->active_ctrl(chip, -1);

	return 0;
}

#ifdef CONFIG_SND_CS46XX_NEW_DSP
snd_pcm_ops_t snd_cs46xx_playback_rear_ops = {
	.open =			snd_cs46xx_playback_open_rear,
	.close =		snd_cs46xx_playback_close,
	.ioctl =		snd_pcm_lib_ioctl,
	.hw_params =		snd_cs46xx_playback_hw_params,
	.hw_free =		snd_cs46xx_playback_hw_free,
	.prepare =		snd_cs46xx_playback_prepare,
	.trigger =		snd_cs46xx_playback_trigger,
	.pointer =		snd_cs46xx_playback_direct_pointer,
};

snd_pcm_ops_t snd_cs46xx_playback_indirect_rear_ops = {
	.open =			snd_cs46xx_playback_open_rear,
	.close =		snd_cs46xx_playback_close,
	.ioctl =		snd_pcm_lib_ioctl,
	.hw_params =		snd_cs46xx_playback_hw_params,
	.hw_free =		snd_cs46xx_playback_hw_free,
	.prepare =		snd_cs46xx_playback_prepare,
	.trigger =		snd_cs46xx_playback_trigger,
	.pointer =		snd_cs46xx_playback_indirect_pointer,
	.ack =			snd_cs46xx_playback_transfer,
};

snd_pcm_ops_t snd_cs46xx_playback_clfe_ops = {
	.open =			snd_cs46xx_playback_open_clfe,
	.close =		snd_cs46xx_playback_close,
	.ioctl =		snd_pcm_lib_ioctl,
	.hw_params =		snd_cs46xx_playback_hw_params,
	.hw_free =		snd_cs46xx_playback_hw_free,
	.prepare =		snd_cs46xx_playback_prepare,
	.trigger =		snd_cs46xx_playback_trigger,
	.pointer =		snd_cs46xx_playback_direct_pointer,
};

snd_pcm_ops_t snd_cs46xx_playback_indirect_clfe_ops = {
	.open =			snd_cs46xx_playback_open_clfe,
	.close =		snd_cs46xx_playback_close,
	.ioctl =		snd_pcm_lib_ioctl,
	.hw_params =		snd_cs46xx_playback_hw_params,
	.hw_free =		snd_cs46xx_playback_hw_free,
	.prepare =		snd_cs46xx_playback_prepare,
	.trigger =		snd_cs46xx_playback_trigger,
	.pointer =		snd_cs46xx_playback_indirect_pointer,
	.ack =			snd_cs46xx_playback_transfer,
};

snd_pcm_ops_t snd_cs46xx_playback_iec958_ops = {
	.open =			snd_cs46xx_playback_open_iec958,
	.close =		snd_cs46xx_playback_close_iec958,
	.ioctl =		snd_pcm_lib_ioctl,
	.hw_params =		snd_cs46xx_playback_hw_params,
	.hw_free =		snd_cs46xx_playback_hw_free,
	.prepare =		snd_cs46xx_playback_prepare,
	.trigger =		snd_cs46xx_playback_trigger,
	.pointer =		snd_cs46xx_playback_direct_pointer,
};

snd_pcm_ops_t snd_cs46xx_playback_indirect_iec958_ops = {
	.open =			snd_cs46xx_playback_open_iec958,
	.close =		snd_cs46xx_playback_close_iec958,
	.ioctl =		snd_pcm_lib_ioctl,
	.hw_params =		snd_cs46xx_playback_hw_params,
	.hw_free =		snd_cs46xx_playback_hw_free,
	.prepare =		snd_cs46xx_playback_prepare,
	.trigger =		snd_cs46xx_playback_trigger,
	.pointer =		snd_cs46xx_playback_indirect_pointer,
	.ack =			snd_cs46xx_playback_transfer,
};

#endif

snd_pcm_ops_t snd_cs46xx_playback_ops = {
	.open =			snd_cs46xx_playback_open,
	.close =		snd_cs46xx_playback_close,
	.ioctl =		snd_pcm_lib_ioctl,
	.hw_params =		snd_cs46xx_playback_hw_params,
	.hw_free =		snd_cs46xx_playback_hw_free,
	.prepare =		snd_cs46xx_playback_prepare,
	.trigger =		snd_cs46xx_playback_trigger,
	.pointer =		snd_cs46xx_playback_direct_pointer,
};

snd_pcm_ops_t snd_cs46xx_playback_indirect_ops = {
	.open =			snd_cs46xx_playback_open,
	.close =		snd_cs46xx_playback_close,
	.ioctl =		snd_pcm_lib_ioctl,
	.hw_params =		snd_cs46xx_playback_hw_params,
	.hw_free =		snd_cs46xx_playback_hw_free,
	.prepare =		snd_cs46xx_playback_prepare,
	.trigger =		snd_cs46xx_playback_trigger,
	.pointer =		snd_cs46xx_playback_indirect_pointer,
	.ack =			snd_cs46xx_playback_transfer,
};

snd_pcm_ops_t snd_cs46xx_capture_ops = {
	.open =			snd_cs46xx_capture_open,
	.close =		snd_cs46xx_capture_close,
	.ioctl =		snd_pcm_lib_ioctl,
	.hw_params =		snd_cs46xx_capture_hw_params,
	.hw_free =		snd_cs46xx_capture_hw_free,
	.prepare =		snd_cs46xx_capture_prepare,
	.trigger =		snd_cs46xx_capture_trigger,
	.pointer =		snd_cs46xx_capture_direct_pointer,
};

snd_pcm_ops_t snd_cs46xx_capture_indirect_ops = {
	.open =			snd_cs46xx_capture_open,
	.close =		snd_cs46xx_capture_close,
	.ioctl =		snd_pcm_lib_ioctl,
	.hw_params =		snd_cs46xx_capture_hw_params,
	.hw_free =		snd_cs46xx_capture_hw_free,
	.prepare =		snd_cs46xx_capture_prepare,
	.trigger =		snd_cs46xx_capture_trigger,
	.pointer =		snd_cs46xx_capture_indirect_pointer,
	.ack =			snd_cs46xx_capture_transfer,
};

static void snd_cs46xx_pcm_free(snd_pcm_t *pcm)
{
	cs46xx_t *chip = snd_magic_cast(cs46xx_t, pcm->private_data, return);
	chip->pcm = NULL;
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

#ifdef CONFIG_SND_CS46XX_NEW_DSP
static void snd_cs46xx_pcm_rear_free(snd_pcm_t *pcm)
{
	cs46xx_t *chip = snd_magic_cast(cs46xx_t, pcm->private_data, return);
	chip->pcm_rear = NULL;
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

static void snd_cs46xx_pcm_center_lfe_free(snd_pcm_t *pcm)
{
	cs46xx_t *chip = snd_magic_cast(cs46xx_t, pcm->private_data, return);
	chip->pcm_center_lfe = NULL;
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

static void snd_cs46xx_pcm_iec958_free(snd_pcm_t *pcm)
{
	cs46xx_t *chip = snd_magic_cast(cs46xx_t, pcm->private_data, return);
	chip->pcm_iec958 = NULL;
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

#define MAX_PLAYBACK_CHANNELS	(DSP_MAX_PCM_CHANNELS - 1)
#else
#define MAX_PLAYBACK_CHANNELS	1
#endif

int __devinit snd_cs46xx_pcm(cs46xx_t *chip, int device, snd_pcm_t ** rpcm)
{
	snd_pcm_t *pcm;
	int err;

	if (rpcm)
		*rpcm = NULL;
	if ((err = snd_pcm_new(chip->card, "CS46xx", device, MAX_PLAYBACK_CHANNELS, 1, &pcm)) < 0)
		return err;

	pcm->private_data = chip;
	pcm->private_free = snd_cs46xx_pcm_free;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_cs46xx_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cs46xx_capture_ops);

	/* global setup */
	pcm->info_flags = 0;
	strcpy(pcm->name, "CS46xx");
	chip->pcm = pcm;

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      snd_dma_pci_data(chip->pci), 64*1024, 256*1024);

	if (rpcm)
		*rpcm = pcm;

	return 0;
}


#ifdef CONFIG_SND_CS46XX_NEW_DSP
int __devinit snd_cs46xx_pcm_rear(cs46xx_t *chip, int device, snd_pcm_t ** rpcm)
{
	snd_pcm_t *pcm;
	int err;

	if (rpcm)
		*rpcm = NULL;

	if ((err = snd_pcm_new(chip->card, "CS46xx - Rear", device, MAX_PLAYBACK_CHANNELS, 0, &pcm)) < 0)
		return err;

	pcm->private_data = chip;
	pcm->private_free = snd_cs46xx_pcm_rear_free;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_cs46xx_playback_rear_ops);

	/* global setup */
	pcm->info_flags = 0;
	strcpy(pcm->name, "CS46xx - Rear");
	chip->pcm_rear = pcm;

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      snd_dma_pci_data(chip->pci), 64*1024, 256*1024);

	if (rpcm)
		*rpcm = pcm;

	return 0;
}

int __devinit snd_cs46xx_pcm_center_lfe(cs46xx_t *chip, int device, snd_pcm_t ** rpcm)
{
	snd_pcm_t *pcm;
	int err;

	if (rpcm)
		*rpcm = NULL;

	if ((err = snd_pcm_new(chip->card, "CS46xx - Center LFE", device, MAX_PLAYBACK_CHANNELS, 0, &pcm)) < 0)
		return err;

	pcm->private_data = chip;
	pcm->private_free = snd_cs46xx_pcm_center_lfe_free;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_cs46xx_playback_clfe_ops);

	/* global setup */
	pcm->info_flags = 0;
	strcpy(pcm->name, "CS46xx - Center LFE");
	chip->pcm_center_lfe = pcm;

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      snd_dma_pci_data(chip->pci), 64*1024, 256*1024);

	if (rpcm)
		*rpcm = pcm;

	return 0;
}

int __devinit snd_cs46xx_pcm_iec958(cs46xx_t *chip, int device, snd_pcm_t ** rpcm)
{
	snd_pcm_t *pcm;
	int err;

	if (rpcm)
		*rpcm = NULL;

	if ((err = snd_pcm_new(chip->card, "CS46xx - IEC958", device, 1, 0, &pcm)) < 0)
		return err;