opti92x-ad1848.c

是关于linux2.5.1的完全源码

	snd_opti93x_mce_up(chip);
	if (!(chip->mode & OPTi93X_MODE_PLAY))
		snd_opti93x_out_mask(chip, OPTi93X_PLAY_FORMAT, 0x0f, fmt);
	else
		fmt = chip->image[OPTi93X_PLAY_FORMAT] & 0xf0;
	snd_opti93x_out_image(chip, OPTi93X_CAPT_FORMAT, fmt);
	snd_opti93x_mce_down(chip);

	snd_opti93x_mute(chip, 0);
	spin_unlock_irqrestore(&chip->lock, flags);
}


static int snd_opti93x_open(opti93x_t *chip, unsigned int mode)
{
	unsigned long flags;

	spin_lock_irqsave(&chip->lock, flags);

	if (chip->mode & mode) {
		spin_unlock_irqrestore(&chip->lock, flags);
		return -EAGAIN;
	}

	if (!(chip->mode & OPTi93X_MODE_OPEN)) {
		outb(0x00, OPTi93X_PORT(chip, STATUS));
		snd_opti93x_out_mask(chip, OPTi93X_PIN_CTRL,
			OPTi93X_IRQ_ENABLE, OPTi93X_IRQ_ENABLE);
		chip->mode = mode;
	}
	else
		chip->mode |= mode;

	spin_unlock_irqrestore(&chip->lock, flags);
	return 0;
}

static void snd_opti93x_close(opti93x_t *chip, unsigned int mode)
{
	unsigned long flags;

	spin_lock_irqsave(&chip->lock, flags);

	chip->mode &= ~mode;
	if (chip->mode & OPTi93X_MODE_OPEN) {
		spin_unlock_irqrestore(&chip->lock, flags);
		return;
	}

	snd_opti93x_mute(chip, 1);

	outb(0, OPTi93X_PORT(chip, STATUS));
	snd_opti93x_out_mask(chip, OPTi93X_PIN_CTRL, OPTi93X_IRQ_ENABLE,
		~OPTi93X_IRQ_ENABLE);

	snd_opti93x_mce_up(chip);
	snd_opti93x_out_image(chip, OPTi93X_IFACE_CONF, 0x00);
	snd_opti93x_mce_down(chip);
	chip->mode = 0;

	snd_opti93x_mute(chip, 0);
	spin_unlock_irqrestore(&chip->lock, flags);
}

static int snd_opti93x_trigger(snd_pcm_substream_t *substream, 
			       unsigned char what, int cmd)
{
	opti93x_t *chip = snd_pcm_substream_chip(substream);

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_STOP:
	{
		unsigned int what = 0;
		snd_pcm_substream_t *s = substream;
		do {
			if (s == chip->playback_substream) {
				what |= OPTi93X_PLAYBACK_ENABLE;
				snd_pcm_trigger_done(s, substream);
			} else if (s == chip->capture_substream) {
				what |= OPTi93X_CAPTURE_ENABLE;
				snd_pcm_trigger_done(s, substream);
			}
			s = s->link_next;
		} while (s != substream);
		spin_lock(&chip->lock);
		if (SNDRV_PCM_TRIGGER_START)
			snd_opti93x_out_mask(chip, OPTi93X_IFACE_CONF, what, what);
		else
			snd_opti93x_out_mask(chip, OPTi93X_IFACE_CONF, what, 0x00);
		spin_unlock(&chip->lock);
		break;
	}
	default:
		return -EINVAL;
	}
	return 0;
}

static int snd_opti93x_playback_trigger(snd_pcm_substream_t *substream, int cmd)
{
	return snd_opti93x_trigger(substream,
				   OPTi93X_PLAYBACK_ENABLE, cmd);
}

static int snd_opti93x_capture_trigger(snd_pcm_substream_t * substream, int cmd)
{
	return snd_opti93x_trigger(substream,
				   OPTi93X_CAPTURE_ENABLE, cmd);
}

static int snd_opti93x_hw_params(snd_pcm_substream_t * substream,
				 snd_pcm_hw_params_t * hw_params)
{
	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
}


static int snd_opti93x_hw_free(snd_pcm_substream_t * substream)
{
	snd_pcm_lib_free_pages(substream);
	return 0;
}


static int snd_opti93x_playback_prepare(snd_pcm_substream_t * substream)
{
	opti93x_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	unsigned long flags;
	unsigned char format;
	unsigned int count = snd_pcm_lib_period_bytes(substream);
	unsigned int size = snd_pcm_lib_buffer_bytes(substream);

	spin_lock_irqsave(&chip->lock, flags);

	chip->p_dma_size = size;
	snd_opti93x_out_mask(chip, OPTi93X_IFACE_CONF,
		OPTi93X_PLAYBACK_ENABLE | OPTi93X_PLAYBACK_PIO,
		~(OPTi93X_PLAYBACK_ENABLE | OPTi93X_PLAYBACK_PIO));

	snd_dma_program(chip->dma1, runtime->dma_addr, size,
		DMA_MODE_WRITE | DMA_AUTOINIT);

	format = snd_opti93x_get_freq(runtime->rate);
	format |= snd_opti93x_get_format(chip, runtime->format,
		runtime->channels);
	snd_opti93x_playback_format(chip, format);
	format = chip->image[OPTi93X_PLAY_FORMAT];

	count = snd_opti93x_get_count(format, count) - 1;
	snd_opti93x_out_image(chip, OPTi93X_PLAY_LWR_CNT, count);
	snd_opti93x_out_image(chip, OPTi93X_PLAY_UPR_CNT, count >> 8);

	spin_unlock_irqrestore(&chip->lock, flags);
	return 0;
}

static int snd_opti93x_capture_prepare(snd_pcm_substream_t *substream)
{
	opti93x_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	unsigned long flags;
	unsigned char format;
	unsigned int count = snd_pcm_lib_period_bytes(substream);
	unsigned int size = snd_pcm_lib_buffer_bytes(substream);

	spin_lock_irqsave(&chip->lock, flags);

	chip->c_dma_size = size;
	snd_opti93x_out_mask(chip, OPTi93X_IFACE_CONF,
		OPTi93X_CAPTURE_ENABLE | OPTi93X_CAPTURE_PIO,
		(unsigned char)~(OPTi93X_CAPTURE_ENABLE | OPTi93X_CAPTURE_PIO));

	snd_dma_program(chip->dma2, runtime->dma_addr, size,
		DMA_MODE_READ | DMA_AUTOINIT);

	format = snd_opti93x_get_freq(runtime->rate);
	format |= snd_opti93x_get_format(chip, runtime->format,
		runtime->channels);
	snd_opti93x_capture_format(chip, format);
	format = chip->image[OPTi93X_CAPT_FORMAT];

	count = snd_opti93x_get_count(format, count) - 1;
	snd_opti93x_out_image(chip, OPTi93X_CAPT_LWR_CNT, count);
	snd_opti93x_out_image(chip, OPTi93X_CAPT_UPR_CNT, count >> 8);

	spin_unlock_irqrestore(&chip->lock, flags);
	return 0;
}

static snd_pcm_uframes_t snd_opti93x_playback_pointer(snd_pcm_substream_t *substream)
{
	opti93x_t *chip = snd_pcm_substream_chip(substream);
	size_t ptr;

	if (!(chip->image[OPTi93X_IFACE_CONF] & OPTi93X_PLAYBACK_ENABLE))
		return 0;

	ptr = chip->p_dma_size - snd_dma_residue(chip->dma1);
	return bytes_to_frames(substream->runtime, ptr);
}

static snd_pcm_uframes_t snd_opti93x_capture_pointer(snd_pcm_substream_t *substream)
{
	opti93x_t *chip = snd_pcm_substream_chip(substream);
	size_t ptr;
	
	if (!(chip->image[OPTi93X_IFACE_CONF] & OPTi93X_CAPTURE_ENABLE))
		return 0;

	ptr = chip->c_dma_size - snd_dma_residue(chip->dma2);
	return bytes_to_frames(substream->runtime, ptr);
}


static void snd_opti93x_overrange(opti93x_t *chip)
{
	unsigned long flags;

	spin_lock_irqsave(&chip->lock, flags);

	if (snd_opti93x_in(chip, OPTi93X_ERR_INIT) & (0x08 | 0x02))
		chip->capture_substream->runtime->overrange++;

	spin_unlock_irqrestore(&chip->lock, flags);
}

void snd_opti93x_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
	opti93x_t *codec = snd_magic_cast(opti93x_t, dev_id, return);
	unsigned char status;

	status = snd_opti9xx_read(codec->chip, OPTi9XX_MC_REG(11));
	if ((status & OPTi93X_IRQ_PLAYBACK) && codec->playback_substream)
		snd_pcm_period_elapsed(codec->playback_substream);
	if ((status & OPTi93X_IRQ_CAPTURE) && codec->capture_substream) {
		snd_opti93x_overrange(codec);
		snd_pcm_period_elapsed(codec->capture_substream);
	}
	outb(0x00, OPTi93X_PORT(codec, STATUS));
}


static snd_pcm_hardware_t snd_opti93x_playback = {
	info:			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START),
	formats:		(SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW | SNDRV_PCM_FMTBIT_IMA_ADPCM |
				 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE),
	rates:			SNDRV_PCM_RATE_KNOT | 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:		1,
	periods_max:		1024,
	fifo_size:		0,
};

static snd_pcm_hardware_t snd_opti93x_capture = {
	info:			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START),
	formats:		(SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW | SNDRV_PCM_FMTBIT_IMA_ADPCM |
				 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE),
	rates:			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:		1,
	periods_max:		1024,
	fifo_size:		0,
};

static int snd_opti93x_playback_open(snd_pcm_substream_t *substream)
{
	int error;
	opti93x_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;

	if ((error = snd_opti93x_open(chip, OPTi93X_MODE_PLAY)) < 0)
		return error;
	snd_pcm_set_sync(substream);
	chip->playback_substream = substream;
	runtime->hw = snd_opti93x_playback;
	snd_pcm_limit_isa_dma_size(chip->dma1, &runtime->hw.buffer_bytes_max);
	snd_pcm_limit_isa_dma_size(chip->dma1, &runtime->hw.period_bytes_max);
	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates);
	return error;
}

static int snd_opti93x_capture_open(snd_pcm_substream_t *substream)
{
	int error;
	opti93x_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;

	if ((error = snd_opti93x_open(chip, OPTi93X_MODE_CAPTURE)) < 0)
		return error;
	runtime->hw = snd_opti93x_capture;
	snd_pcm_set_sync(substream);
	snd_pcm_limit_isa_dma_size(chip->dma2, &runtime->hw.buffer_bytes_max);
	snd_pcm_limit_isa_dma_size(chip->dma2, &runtime->hw.period_bytes_max);
	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates);
	return error;
}

static int snd_opti93x_playback_close(snd_pcm_substream_t *substream)
{
	opti93x_t *chip = snd_pcm_substream_chip(substream);

	chip->playback_substream = NULL;
	snd_opti93x_close(chip, OPTi93X_MODE_PLAY);
	return 0;
}

static int snd_opti93x_capture_close(snd_pcm_substream_t *substream)
{
	opti93x_t *chip = snd_pcm_substream_chip(substream);

	chip->capture_substream = NULL;
	snd_opti93x_close(chip, OPTi93X_MODE_CAPTURE);
	return 0;
}


static void snd_opti93x_init(opti93x_t *chip)
{
	unsigned long flags;
	int i;

	spin_lock_irqsave(&chip->lock, flags);
	snd_opti93x_mce_up(chip);

	for (i = 0; i < 32; i++)
		snd_opti93x_out_image(chip, i, snd_opti93x_default_image[i]);

	snd_opti93x_mce_down(chip);
	spin_unlock_irqrestore(&chip->lock, flags);
}

static int snd_opti93x_probe(opti93x_t *chip)
{
	unsigned long flags;
	unsigned char val;

	spin_lock_irqsave(&chip->lock, flags);
	val = snd_opti93x_in(chip, OPTi93X_ID) & 0x0f;
	spin_unlock_irqrestore(&chip->lock, flags);

	return (val == 0x0a) ? 0 : -ENODEV;
}

static int snd_opti93x_free(opti93x_t *chip)
{
	if (chip->res_port) {
		release_resource(chip->res_port);
		kfree_nocheck(chip->res_port);
	}
	if (chip->dma1 >= 0) {
		disable_dma(chip->dma1);
		free_dma(chip->dma1);
	}
	if (chip->dma2 >= 0) {
		disable_dma(chip->dma2);
		free_dma(chip->dma2);
	}
	snd_magic_kfree(chip);
	return 0;
}

static int snd_opti93x_dev_free(snd_device_t *device)
{
	opti93x_t *chip = snd_magic_cast(opti93x_t, device->device_data, return -ENXIO);
	return snd_opti93x_free(chip);
}

static const char *snd_opti93x_chip_id(opti93x_t *codec)
{
	switch (codec->hardware) {
	case OPTi9XX_HW_82C930: return "82C930";
	case OPTi9XX_HW_82C931: return "82C931";
	case OPTi9XX_HW_82C933: return "82C933";
	default:		return "???";
	}
}

int snd_opti93x_create(snd_card_t *card, opti9xx_t *chip,
		       int dma1, int dma2,
		       opti93x_t **rcodec)
{
	static snd_device_ops_t ops = {
		dev_free:	snd_opti93x_dev_free,
	};
	int error;
	opti93x_t *codec;

	*rcodec = NULL;
	codec = snd_magic_kcalloc(opti93x_t, 0, GFP_KERNEL);
	if (codec == NULL)
		return -ENOMEM;
	codec->irq = -1;
	codec->dma1 = -1;
	codec->dma2 = -1;

	if ((codec->res_port = request_region(chip->wss_base + 4, 4, "OPTI93x CODEC")) == NULL) {
		snd_opti93x_free(codec);
		return -EBUSY;
	}
	if (request_dma(dma1, "OPTI93x - 1")) {
		snd_opti93x_free(codec);
		return -EBUSY;
	}
	codec->dma1 = chip->dma1;
	if (request_dma(dma2, "OPTI93x - 2")) {
		snd_opti93x_free(codec);
		return -EBUSY;
	}
	codec->dma2 = chip->dma2;

	codec->card = card;
	codec->port = chip->wss_base + 4;
	codec->irq = chip->irq;

	spin_lock_init(&codec->lock);
	codec->hardware = chip->hardware;
	codec->chip = chip;

	if ((error = snd_opti93x_probe(codec))) {
		snd_opti93x_free(codec);
		return error;
	}

	snd_opti93x_init(codec);

	/* Register device */
	if ((error = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {