cmipci.c

Linux Kernel 2.6.9 for OMAP1710

	snd_cmipci_clear_bit(cm, CM_REG_INT_HLDCLR, mask);
	snd_cmipci_set_bit(cm, CM_REG_INT_HLDCLR, mask);
	spin_unlock(&cm->reg_lock);

	if (cm->rmidi && (status & CM_UARTINT))
		snd_mpu401_uart_interrupt(irq, cm->rmidi->private_data, regs);

	if (cm->pcm) {
		if ((status & CM_CHINT0) && cm->channel[0].running)
			snd_pcm_period_elapsed(cm->channel[0].substream);
		if ((status & CM_CHINT1) && cm->channel[1].running)
			snd_pcm_period_elapsed(cm->channel[1].substream);
	}
	return IRQ_HANDLED;
}

/*
 * h/w infos
 */

/* playback on channel A */
static snd_pcm_hardware_t snd_cmipci_playback =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_PAUSE |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
	.rates =		SNDRV_PCM_RATE_5512 | SNDRV_PCM_RATE_8000_48000,
	.rate_min =		5512,
	.rate_max =		48000,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	(128*1024),
	.period_bytes_min =	64,
	.period_bytes_max =	(128*1024),
	.periods_min =		2,
	.periods_max =		1024,
	.fifo_size =		0,
};

/* capture on channel B */
static snd_pcm_hardware_t snd_cmipci_capture =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_PAUSE |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
	.rates =		SNDRV_PCM_RATE_5512 | SNDRV_PCM_RATE_8000_48000,
	.rate_min =		5512,
	.rate_max =		48000,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	(128*1024),
	.period_bytes_min =	64,
	.period_bytes_max =	(128*1024),
	.periods_min =		2,
	.periods_max =		1024,
	.fifo_size =		0,
};

/* playback on channel B - stereo 16bit only? */
static snd_pcm_hardware_t snd_cmipci_playback2 =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_PAUSE |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
	.rates =		SNDRV_PCM_RATE_5512 | SNDRV_PCM_RATE_8000_48000,
	.rate_min =		5512,
	.rate_max =		48000,
	.channels_min =		2,
	.channels_max =		2,
	.buffer_bytes_max =	(128*1024),
	.period_bytes_min =	64,
	.period_bytes_max =	(128*1024),
	.periods_min =		2,
	.periods_max =		1024,
	.fifo_size =		0,
};

/* spdif playback on channel A */
static snd_pcm_hardware_t snd_cmipci_playback_spdif =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_PAUSE |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
	.rates =		SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
	.rate_min =		44100,
	.rate_max =		48000,
	.channels_min =		2,
	.channels_max =		2,
	.buffer_bytes_max =	(128*1024),
	.period_bytes_min =	64,
	.period_bytes_max =	(128*1024),
	.periods_min =		2,
	.periods_max =		1024,
	.fifo_size =		0,
};

/* spdif playback on channel A (32bit, IEC958 subframes) */
static snd_pcm_hardware_t snd_cmipci_playback_iec958_subframe =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_PAUSE |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
	.rates =		SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
	.rate_min =		44100,
	.rate_max =		48000,
	.channels_min =		2,
	.channels_max =		2,
	.buffer_bytes_max =	(128*1024),
	.period_bytes_min =	64,
	.period_bytes_max =	(128*1024),
	.periods_min =		2,
	.periods_max =		1024,
	.fifo_size =		0,
};

/* spdif capture on channel B */
static snd_pcm_hardware_t snd_cmipci_capture_spdif =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_PAUSE |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =	        SNDRV_PCM_FMTBIT_S16_LE,
	.rates =		SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
	.rate_min =		44100,
	.rate_max =		48000,
	.channels_min =		2,
	.channels_max =		2,
	.buffer_bytes_max =	(128*1024),
	.period_bytes_min =	64,
	.period_bytes_max =	(128*1024),
	.periods_min =		2,
	.periods_max =		1024,
	.fifo_size =		0,
};

/*
 * check device open/close
 */
static int open_device_check(cmipci_t *cm, int mode, snd_pcm_substream_t *subs)
{
	int ch = mode & CM_OPEN_CH_MASK;

	/* FIXME: a file should wait until the device becomes free
	 * when it's opened on blocking mode.  however, since the current
	 * pcm framework doesn't pass file pointer before actually opened,
	 * we can't know whether blocking mode or not in open callback..
	 */
	down(&cm->open_mutex);
	if (cm->opened[ch]) {
		up(&cm->open_mutex);
		return -EBUSY;
	}
	cm->opened[ch] = mode;
	cm->channel[ch].substream = subs;
	if (! (mode & CM_OPEN_DAC)) {
		/* disable dual DAC mode */
		cm->channel[ch].is_dac = 0;
		spin_lock_irq(&cm->reg_lock);
		snd_cmipci_clear_bit(cm, CM_REG_MISC_CTRL, CM_ENDBDAC);
		spin_unlock_irq(&cm->reg_lock);
	}
	up(&cm->open_mutex);
	return 0;
}

static void close_device_check(cmipci_t *cm, int mode)
{
	int ch = mode & CM_OPEN_CH_MASK;

	down(&cm->open_mutex);
	if (cm->opened[ch] == mode) {
		if (cm->channel[ch].substream) {
			snd_cmipci_ch_reset(cm, ch);
			cm->channel[ch].running = 0;
			cm->channel[ch].substream = NULL;
		}
		cm->opened[ch] = 0;
		if (! cm->channel[ch].is_dac) {
			/* enable dual DAC mode again */
			cm->channel[ch].is_dac = 1;
			spin_lock_irq(&cm->reg_lock);
			snd_cmipci_set_bit(cm, CM_REG_MISC_CTRL, CM_ENDBDAC);
			spin_unlock_irq(&cm->reg_lock);
		}
	}
	up(&cm->open_mutex);
}

/*
 */

static int snd_cmipci_playback_open(snd_pcm_substream_t *substream)
{
	cmipci_t *cm = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	int err;

	if ((err = open_device_check(cm, CM_OPEN_PLAYBACK, substream)) < 0)
		return err;
	runtime->hw = snd_cmipci_playback;
	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 0x10000);
	cm->dig_pcm_status = cm->dig_status;
	return 0;
}

static int snd_cmipci_capture_open(snd_pcm_substream_t *substream)
{
	cmipci_t *cm = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	int err;

	if ((err = open_device_check(cm, CM_OPEN_CAPTURE, substream)) < 0)
		return err;
	runtime->hw = snd_cmipci_capture;
	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 0x10000);
	return 0;
}

static int snd_cmipci_playback2_open(snd_pcm_substream_t *substream)
{
	cmipci_t *cm = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	int err;

	if ((err = open_device_check(cm, CM_OPEN_PLAYBACK2, substream)) < 0) /* use channel B */
		return err;
	runtime->hw = snd_cmipci_playback2;
	down(&cm->open_mutex);
	if (! cm->opened[CM_CH_PLAY]) {
		if (cm->can_multi_ch) {
			runtime->hw.channels_max = cm->max_channels;
			if (cm->max_channels == 4)
				snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, &hw_constraints_channels_4);
			else
				snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, &hw_constraints_channels_6);
		}
		snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 0x10000);
	}
	up(&cm->open_mutex);
	return 0;
}

static int snd_cmipci_playback_spdif_open(snd_pcm_substream_t *substream)
{
	cmipci_t *cm = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	int err;

	if ((err = open_device_check(cm, CM_OPEN_SPDIF_PLAYBACK, substream)) < 0) /* use channel A */
		return err;
	if (cm->can_ac3_hw) {
		runtime->hw = snd_cmipci_playback_spdif;
		if (cm->chip_version >= 37)
			runtime->hw.formats |= SNDRV_PCM_FMTBIT_S32_LE;
	} else {
		runtime->hw = snd_cmipci_playback_iec958_subframe;
	}
	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 0x40000);
	cm->dig_pcm_status = cm->dig_status;
	return 0;
}

static int snd_cmipci_capture_spdif_open(snd_pcm_substream_t * substream)
{
	cmipci_t *cm = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	int err;

	if ((err = open_device_check(cm, CM_OPEN_SPDIF_CAPTURE, substream)) < 0) /* use channel B */
		return err;
	runtime->hw = snd_cmipci_capture_spdif;
	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 0x40000);
	return 0;
}


/*
 */

static int snd_cmipci_playback_close(snd_pcm_substream_t * substream)
{
	cmipci_t *cm = snd_pcm_substream_chip(substream);
	close_device_check(cm, CM_OPEN_PLAYBACK);
	return 0;
}

static int snd_cmipci_capture_close(snd_pcm_substream_t * substream)
{
	cmipci_t *cm = snd_pcm_substream_chip(substream);
	close_device_check(cm, CM_OPEN_CAPTURE);
	return 0;
}

static int snd_cmipci_playback2_close(snd_pcm_substream_t * substream)
{
	cmipci_t *cm = snd_pcm_substream_chip(substream);
	close_device_check(cm, CM_OPEN_PLAYBACK2);
	close_device_check(cm, CM_OPEN_PLAYBACK_MULTI);
	return 0;
}

static int snd_cmipci_playback_spdif_close(snd_pcm_substream_t * substream)
{
	cmipci_t *cm = snd_pcm_substream_chip(substream);
	close_device_check(cm, CM_OPEN_SPDIF_PLAYBACK);
	return 0;
}

static int snd_cmipci_capture_spdif_close(snd_pcm_substream_t * substream)
{
	cmipci_t *cm = snd_pcm_substream_chip(substream);
	close_device_check(cm, CM_OPEN_SPDIF_CAPTURE);
	return 0;
}


/*
 */

static snd_pcm_ops_t snd_cmipci_playback_ops = {
	.open =		snd_cmipci_playback_open,
	.close =	snd_cmipci_playback_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_cmipci_hw_params,
	.hw_free =	snd_cmipci_playback_hw_free,
	.prepare =	snd_cmipci_playback_prepare,
	.trigger =	snd_cmipci_playback_trigger,
	.pointer =	snd_cmipci_playback_pointer,
};

static snd_pcm_ops_t snd_cmipci_capture_ops = {
	.open =		snd_cmipci_capture_open,
	.close =	snd_cmipci_capture_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_cmipci_hw_params,
	.hw_free =	snd_cmipci_hw_free,
	.prepare =	snd_cmipci_capture_prepare,
	.trigger =	snd_cmipci_capture_trigger,
	.pointer =	snd_cmipci_capture_pointer,
};

static snd_pcm_ops_t snd_cmipci_playback2_ops = {
	.open =		snd_cmipci_playback2_open,
	.close =	snd_cmipci_playback2_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_cmipci_playback2_hw_params,
	.hw_free =	snd_cmipci_hw_free,
	.prepare =	snd_cmipci_capture_prepare,	/* channel B */
	.trigger =	snd_cmipci_capture_trigger,	/* channel B */
	.pointer =	snd_cmipci_capture_pointer,	/* channel B */
};

static snd_pcm_ops_t snd_cmipci_playback_spdif_ops = {
	.open =		snd_cmipci_playback_spdif_open,
	.close =	snd_cmipci_playback_spdif_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_cmipci_hw_params,
	.hw_free =	snd_cmipci_playback_hw_free,
	.prepare =	snd_cmipci_playback_spdif_prepare,	/* set up rate */
	.trigger =	snd_cmipci_playback_trigger,
	.pointer =	snd_cmipci_playback_pointer,
};

static snd_pcm_ops_t snd_cmipci_capture_spdif_ops = {
	.open =		snd_cmipci_capture_spdif_open,
	.close =	snd_cmipci_capture_spdif_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_cmipci_hw_params,
	.hw_free =	snd_cmipci_capture_spdif_hw_free,
	.prepare =	snd_cmipci_capture_spdif_prepare,
	.trigger =	snd_cmipci_capture_trigger,
	.pointer =	snd_cmipci_capture_pointer,
};


/*
 */

static void snd_cmipci_pcm_free(snd_pcm_t *pcm)
{
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

static int __devinit snd_cmipci_pcm_new(cmipci_t *cm, int device)
{
	snd_pcm_t *pcm;
	int err;

	err = snd_pcm_new(cm->card, cm->card->driver, device, 1, 1, &pcm);
	if (err < 0)
		return err;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_cmipci_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cmipci_capture_ops);

	pcm->private_data = cm;
	pcm->private_free = snd_cmipci_pcm_free;
	pcm->info_flags = 0;
	strcpy(pcm->name, "C-Media PCI DAC/ADC");
	cm->pcm = pcm;

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      snd_dma_pci_data(cm->pci), 64*1024, 128*1024);

	return 0;
}

static int __devinit snd_cmipci_pcm2_new(cmipci_t *cm, int device)
{
	snd_pcm_t *pcm;
	int err;

	err = snd_pcm_new(cm->card, cm->card->driver, device, 1, 0, &pcm);
	if (err < 0)
		return err;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_cmipci_playback2_ops);

	pcm->private_data = cm;
	pcm->private_free = snd_cmipci_pcm_free;
	pcm->info_flags = 0;
	strcpy(pcm->name, "C-Media PCI 2nd DAC");
	cm->pcm2 = pcm;

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      snd_dma_pci_data(cm->pci), 64*1024, 128*1024);

	return 0;
}