sb16_main.c

linux-2.6.15.6

	unsigned int dma;
	size_t ptr;

	dma = (chip->mode & SB_MODE_CAPTURE_8) ? chip->dma8 : chip->dma16;
	ptr = snd_dma_pointer(dma, chip->c_dma_size);
	return bytes_to_frames(substream->runtime, ptr);
}

/*

 */

static snd_pcm_hardware_t snd_sb16_playback =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		0,
	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_44100,
	.rate_min =		4000,
	.rate_max =		44100,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	(128*1024),
	.period_bytes_min =	64,
	.period_bytes_max =	(128*1024),
	.periods_min =		1,
	.periods_max =		1024,
	.fifo_size =		0,
};

static snd_pcm_hardware_t snd_sb16_capture =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		0,
	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_44100,
	.rate_min =		4000,
	.rate_max =		44100,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	(128*1024),
	.period_bytes_min =	64,
	.period_bytes_max =	(128*1024),
	.periods_min =		1,
	.periods_max =		1024,
	.fifo_size =		0,
};

/*
 *  open/close
 */

static int snd_sb16_playback_open(snd_pcm_substream_t * substream)
{
	unsigned long flags;
	sb_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;

	spin_lock_irqsave(&chip->open_lock, flags);
	if (chip->mode & SB_MODE_PLAYBACK) {
		spin_unlock_irqrestore(&chip->open_lock, flags);
		return -EAGAIN;
	}
	runtime->hw = snd_sb16_playback;

	/* skip if 16 bit DMA was reserved for capture */
	if (chip->force_mode16 & SB_MODE_CAPTURE_16)
		goto __skip_16bit;

	if (chip->dma16 >= 0 && !(chip->mode & SB_MODE_CAPTURE_16)) {
		chip->mode |= SB_MODE_PLAYBACK_16;
		runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE;
		/* Vibra16X hack */
		if (chip->dma16 <= 3) {
			runtime->hw.buffer_bytes_max =
			runtime->hw.period_bytes_max = 64 * 1024;
		} else {
			snd_sb16_csp_playback_open(chip, runtime);
		}
		goto __open_ok;
	}

      __skip_16bit:
	if (chip->dma8 >= 0 && !(chip->mode & SB_MODE_CAPTURE_8)) {
		chip->mode |= SB_MODE_PLAYBACK_8;
		/* DSP v 4.xx can transfer 16bit data through 8bit DMA channel, SBHWPG 2-7 */
		if (chip->dma16 < 0) {
			runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE;
			chip->mode |= SB_MODE_PLAYBACK_16;
		} else {
			runtime->hw.formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8;
		}
		runtime->hw.buffer_bytes_max =
		runtime->hw.period_bytes_max = 64 * 1024;
		goto __open_ok;
	}
	spin_unlock_irqrestore(&chip->open_lock, flags);
	return -EAGAIN;

      __open_ok:
	if (chip->hardware == SB_HW_ALS100)
		runtime->hw.rate_max = 48000;
	if (chip->mode & SB_RATE_LOCK)
		runtime->hw.rate_min = runtime->hw.rate_max = chip->locked_rate;
	chip->playback_substream = substream;
	spin_unlock_irqrestore(&chip->open_lock, flags);
	return 0;
}

static int snd_sb16_playback_close(snd_pcm_substream_t * substream)
{
	unsigned long flags;
	sb_t *chip = snd_pcm_substream_chip(substream);

	snd_sb16_csp_playback_close(chip);
	spin_lock_irqsave(&chip->open_lock, flags);
	chip->playback_substream = NULL;
	chip->mode &= ~SB_MODE_PLAYBACK;
	spin_unlock_irqrestore(&chip->open_lock, flags);
	return 0;
}

static int snd_sb16_capture_open(snd_pcm_substream_t * substream)
{
	unsigned long flags;
	sb_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;

	spin_lock_irqsave(&chip->open_lock, flags);
	if (chip->mode & SB_MODE_CAPTURE) {
		spin_unlock_irqrestore(&chip->open_lock, flags);
		return -EAGAIN;
	}
	runtime->hw = snd_sb16_capture;

	/* skip if 16 bit DMA was reserved for playback */
	if (chip->force_mode16 & SB_MODE_PLAYBACK_16)
		goto __skip_16bit;

	if (chip->dma16 >= 0 && !(chip->mode & SB_MODE_PLAYBACK_16)) {
		chip->mode |= SB_MODE_CAPTURE_16;
		runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE;
		/* Vibra16X hack */
		if (chip->dma16 <= 3) {
			runtime->hw.buffer_bytes_max =
			runtime->hw.period_bytes_max = 64 * 1024;
		} else {
			snd_sb16_csp_capture_open(chip, runtime);
		}
		goto __open_ok;
	}

      __skip_16bit:
	if (chip->dma8 >= 0 && !(chip->mode & SB_MODE_PLAYBACK_8)) {
		chip->mode |= SB_MODE_CAPTURE_8;
		/* DSP v 4.xx can transfer 16bit data through 8bit DMA channel, SBHWPG 2-7 */
		if (chip->dma16 < 0) {
			runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE;
			chip->mode |= SB_MODE_CAPTURE_16;
		} else {
			runtime->hw.formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8;
		}
		runtime->hw.buffer_bytes_max =
		runtime->hw.period_bytes_max = 64 * 1024;
		goto __open_ok;
	}
	spin_unlock_irqrestore(&chip->open_lock, flags);
	return -EAGAIN;

      __open_ok:
	if (chip->hardware == SB_HW_ALS100)
		runtime->hw.rate_max = 48000;
	if (chip->mode & SB_RATE_LOCK)
		runtime->hw.rate_min = runtime->hw.rate_max = chip->locked_rate;
	chip->capture_substream = substream;
	spin_unlock_irqrestore(&chip->open_lock, flags);
	return 0;
}

static int snd_sb16_capture_close(snd_pcm_substream_t * substream)
{
	unsigned long flags;
	sb_t *chip = snd_pcm_substream_chip(substream);

	snd_sb16_csp_capture_close(chip);
	spin_lock_irqsave(&chip->open_lock, flags);
	chip->capture_substream = NULL;
	chip->mode &= ~SB_MODE_CAPTURE;
	spin_unlock_irqrestore(&chip->open_lock, flags);
	return 0;
}

/*
 *  DMA control interface
 */

static int snd_sb16_set_dma_mode(sb_t *chip, int what)
{
	if (chip->dma8 < 0 || chip->dma16 < 0) {
		snd_assert(what == 0, return -EINVAL);
		return 0;
	}
	if (what == 0) {
		chip->force_mode16 = 0;
	} else if (what == 1) {
		chip->force_mode16 = SB_MODE_PLAYBACK_16;
	} else if (what == 2) {
		chip->force_mode16 = SB_MODE_CAPTURE_16;
	} else {
		return -EINVAL;
	}
	return 0;
}

static int snd_sb16_get_dma_mode(sb_t *chip)
{
	if (chip->dma8 < 0 || chip->dma16 < 0)
		return 0;
	switch (chip->force_mode16) {
	case SB_MODE_PLAYBACK_16:
		return 1;
	case SB_MODE_CAPTURE_16:
		return 2;
	default:
		return 0;
	}
}

static int snd_sb16_dma_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	static char *texts[3] = {
		"Auto", "Playback", "Capture"
	};

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 3;
	if (uinfo->value.enumerated.item > 2)
		uinfo->value.enumerated.item = 2;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_sb16_dma_control_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	sb_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	
	spin_lock_irqsave(&chip->reg_lock, flags);
	ucontrol->value.enumerated.item[0] = snd_sb16_get_dma_mode(chip);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	return 0;
}

static int snd_sb16_dma_control_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	sb_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	unsigned char nval, oval;
	int change;
	
	if ((nval = ucontrol->value.enumerated.item[0]) > 2)
		return -EINVAL;
	spin_lock_irqsave(&chip->reg_lock, flags);
	oval = snd_sb16_get_dma_mode(chip);
	change = nval != oval;
	snd_sb16_set_dma_mode(chip, nval);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	return change;
}

static snd_kcontrol_new_t snd_sb16_dma_control = {
	.iface = SNDRV_CTL_ELEM_IFACE_CARD,
	.name = "16-bit DMA Allocation",
	.info = snd_sb16_dma_control_info,
	.get = snd_sb16_dma_control_get,
	.put = snd_sb16_dma_control_put
};

/*
 *  Initialization part
 */
 
int snd_sb16dsp_configure(sb_t * chip)
{
	unsigned long flags;
	unsigned char irqreg = 0, dmareg = 0, mpureg;
	unsigned char realirq, realdma, realmpureg;
	/* note: mpu register should be present only on SB16 Vibra soundcards */

	// printk(KERN_DEBUG "codec->irq=%i, codec->dma8=%i, codec->dma16=%i\n", chip->irq, chip->dma8, chip->dma16);
	spin_lock_irqsave(&chip->mixer_lock, flags);
	mpureg = snd_sbmixer_read(chip, SB_DSP4_MPUSETUP) & ~0x06;
	spin_unlock_irqrestore(&chip->mixer_lock, flags);
	switch (chip->irq) {
	case 2:
	case 9:
		irqreg |= SB_IRQSETUP_IRQ9;
		break;
	case 5:
		irqreg |= SB_IRQSETUP_IRQ5;
		break;
	case 7:
		irqreg |= SB_IRQSETUP_IRQ7;
		break;
	case 10:
		irqreg |= SB_IRQSETUP_IRQ10;
		break;
	default:
		return -EINVAL;
	}
	if (chip->dma8 >= 0) {
		switch (chip->dma8) {
		case 0:
			dmareg |= SB_DMASETUP_DMA0;
			break;
		case 1:
			dmareg |= SB_DMASETUP_DMA1;
			break;
		case 3:
			dmareg |= SB_DMASETUP_DMA3;
			break;
		default:
			return -EINVAL;
		}
	}
	if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) {
		switch (chip->dma16) {
		case 5:
			dmareg |= SB_DMASETUP_DMA5;
			break;
		case 6:
			dmareg |= SB_DMASETUP_DMA6;
			break;
		case 7:
			dmareg |= SB_DMASETUP_DMA7;
			break;
		default:
			return -EINVAL;
		}
	}
	switch (chip->mpu_port) {
	case 0x300:
		mpureg |= 0x04;
		break;
	case 0x330:
		mpureg |= 0x00;
		break;
	default:
		mpureg |= 0x02;	/* disable MPU */
	}
	spin_lock_irqsave(&chip->mixer_lock, flags);

	snd_sbmixer_write(chip, SB_DSP4_IRQSETUP, irqreg);
	realirq = snd_sbmixer_read(chip, SB_DSP4_IRQSETUP);

	snd_sbmixer_write(chip, SB_DSP4_DMASETUP, dmareg);
	realdma = snd_sbmixer_read(chip, SB_DSP4_DMASETUP);

	snd_sbmixer_write(chip, SB_DSP4_MPUSETUP, mpureg);
	realmpureg = snd_sbmixer_read(chip, SB_DSP4_MPUSETUP);

	spin_unlock_irqrestore(&chip->mixer_lock, flags);
	if ((~realirq) & irqreg || (~realdma) & dmareg) {
		snd_printk(KERN_ERR "SB16 [0x%lx]: unable to set DMA & IRQ (PnP device?)\n", chip->port);
		snd_printk(KERN_ERR "SB16 [0x%lx]: wanted: irqreg=0x%x, dmareg=0x%x, mpureg = 0x%x\n", chip->port, realirq, realdma, realmpureg);
		snd_printk(KERN_ERR "SB16 [0x%lx]:    got: irqreg=0x%x, dmareg=0x%x, mpureg = 0x%x\n", chip->port, irqreg, dmareg, mpureg);
		return -ENODEV;
	}
	return 0;
}

static snd_pcm_ops_t snd_sb16_playback_ops = {
	.open =		snd_sb16_playback_open,
	.close =	snd_sb16_playback_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_sb16_hw_params,
	.hw_free =	snd_sb16_hw_free,
	.prepare =	snd_sb16_playback_prepare,
	.trigger =	snd_sb16_playback_trigger,
	.pointer =	snd_sb16_playback_pointer,
};

static snd_pcm_ops_t snd_sb16_capture_ops = {
	.open =		snd_sb16_capture_open,
	.close =	snd_sb16_capture_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_sb16_hw_params,
	.hw_free =	snd_sb16_hw_free,
	.prepare =	snd_sb16_capture_prepare,
	.trigger =	snd_sb16_capture_trigger,
	.pointer =	snd_sb16_capture_pointer,
};

static void snd_sb16dsp_pcm_free(snd_pcm_t *pcm)
{
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

int snd_sb16dsp_pcm(sb_t * chip, int device, snd_pcm_t ** rpcm)
{
	snd_card_t *card = chip->card;
	snd_pcm_t *pcm;
	int err;

	if (rpcm)
		*rpcm = NULL;
	if ((err = snd_pcm_new(card, "SB16 DSP", device, 1, 1, &pcm)) < 0)
		return err;
	sprintf(pcm->name, "DSP v%i.%i", chip->version >> 8, chip->version & 0xff);
	pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
	pcm->private_data = chip;
	pcm->private_free = snd_sb16dsp_pcm_free;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sb16_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_sb16_capture_ops);

	if (chip->dma16 >= 0 && chip->dma8 != chip->dma16)
		snd_ctl_add(card, snd_ctl_new1(&snd_sb16_dma_control, chip));
	else
		pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      snd_dma_isa_data(),
					      64*1024, 128*1024);

	if (rpcm)
		*rpcm = pcm;
	return 0;
}

const snd_pcm_ops_t *snd_sb16dsp_get_pcm_ops(int direction)
{
	return direction == SNDRV_PCM_STREAM_PLAYBACK ?
		&snd_sb16_playback_ops : &snd_sb16_capture_ops;
}

EXPORT_SYMBOL(snd_sb16dsp_pcm);
EXPORT_SYMBOL(snd_sb16dsp_get_pcm_ops);
EXPORT_SYMBOL(snd_sb16dsp_configure);
EXPORT_SYMBOL(snd_sb16dsp_interrupt);

/*
 *  INIT part
 */

static int __init alsa_sb16_init(void)
{
	return 0;
}

static void __exit alsa_sb16_exit(void)
{
}

module_init(alsa_sb16_init)
module_exit(alsa_sb16_exit)