p16v.c

linux2.6.16版本

	u32 inte = 0;
	int running=0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		running=1;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	default:
		running=0;
		break;
	}
        snd_pcm_group_for_each(pos, substream) {
                s = snd_pcm_group_substream_entry(pos);
		runtime = s->runtime;
		epcm = runtime->private_data;
		channel = substream->pcm->device-emu->p16v_device_offset;
		//snd_printk("p16v channel=%d\n",channel);
		epcm->running = running;
		basic |= (0x1<<channel);
		inte |= (INTE2_PLAYBACK_CH_0_LOOP<<channel);
                snd_pcm_trigger_done(s, substream);
        }
	//snd_printk("basic=0x%x, inte=0x%x\n",basic, inte);

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		snd_p16v_intr_enable(emu, inte);
		snd_emu10k1_ptr20_write(emu, BASIC_INTERRUPT, 0, snd_emu10k1_ptr20_read(emu, BASIC_INTERRUPT, 0)| (basic));
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		snd_emu10k1_ptr20_write(emu, BASIC_INTERRUPT, 0, snd_emu10k1_ptr20_read(emu, BASIC_INTERRUPT, 0) & ~(basic));
		snd_p16v_intr_disable(emu, inte);
		break;
	default:
		result = -EINVAL;
		break;
	}
	return result;
}

/* trigger_capture callback */
static int snd_p16v_pcm_trigger_capture(struct snd_pcm_substream *substream,
                                   int cmd)
{
	struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_emu10k1_pcm *epcm = runtime->private_data;
	int channel = 0;
	int result = 0;
	u32 inte = INTE2_CAPTURE_CH_0_LOOP | INTE2_CAPTURE_CH_0_HALF_LOOP;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		snd_p16v_intr_enable(emu, inte);
		snd_emu10k1_ptr20_write(emu, BASIC_INTERRUPT, 0, snd_emu10k1_ptr20_read(emu, BASIC_INTERRUPT, 0)|(0x100<<channel));
		epcm->running = 1;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		snd_emu10k1_ptr20_write(emu, BASIC_INTERRUPT, 0, snd_emu10k1_ptr20_read(emu, BASIC_INTERRUPT, 0) & ~(0x100<<channel));
		snd_p16v_intr_disable(emu, inte);
		//snd_emu10k1_ptr20_write(emu, EXTENDED_INT_MASK, 0, snd_emu10k1_ptr20_read(emu, EXTENDED_INT_MASK, 0) & ~(0x110000<<channel));
		epcm->running = 0;
		break;
	default:
		result = -EINVAL;
		break;
	}
	return result;
}

/* pointer_playback callback */
static snd_pcm_uframes_t
snd_p16v_pcm_pointer_playback(struct snd_pcm_substream *substream)
{
	struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_emu10k1_pcm *epcm = runtime->private_data;
	snd_pcm_uframes_t ptr, ptr1, ptr2,ptr3,ptr4 = 0;
	int channel = substream->pcm->device - emu->p16v_device_offset;
	if (!epcm->running)
		return 0;

	ptr3 = snd_emu10k1_ptr20_read(emu, PLAYBACK_LIST_PTR, channel);
	ptr1 = snd_emu10k1_ptr20_read(emu, PLAYBACK_POINTER, channel);
	ptr4 = snd_emu10k1_ptr20_read(emu, PLAYBACK_LIST_PTR, channel);
	if (ptr3 != ptr4) ptr1 = snd_emu10k1_ptr20_read(emu, PLAYBACK_POINTER, channel);
	ptr2 = bytes_to_frames(runtime, ptr1);
	ptr2+= (ptr4 >> 3) * runtime->period_size;
	ptr=ptr2;
        if (ptr >= runtime->buffer_size)
		ptr -= runtime->buffer_size;

	return ptr;
}

/* pointer_capture callback */
static snd_pcm_uframes_t
snd_p16v_pcm_pointer_capture(struct snd_pcm_substream *substream)
{
	struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_emu10k1_pcm *epcm = runtime->private_data;
	snd_pcm_uframes_t ptr, ptr1, ptr2 = 0;
	int channel = 0;

	if (!epcm->running)
		return 0;

	ptr1 = snd_emu10k1_ptr20_read(emu, CAPTURE_POINTER, channel);
	ptr2 = bytes_to_frames(runtime, ptr1);
	ptr=ptr2;
	if (ptr >= runtime->buffer_size) {
		ptr -= runtime->buffer_size;
		printk(KERN_WARNING "buffer capture limited!\n");
	}
	//printk("ptr1 = 0x%lx, ptr2=0x%lx, ptr=0x%lx, buffer_size = 0x%x, period_size = 0x%x, bits=%d, rate=%d\n", ptr1, ptr2, ptr, (int)runtime->buffer_size, (int)runtime->period_size, (int)runtime->frame_bits, (int)runtime->rate);

	return ptr;
}

/* operators */
static struct snd_pcm_ops snd_p16v_playback_front_ops = {
	.open =        snd_p16v_pcm_open_playback_front,
	.close =       snd_p16v_pcm_close_playback,
	.ioctl =       snd_pcm_lib_ioctl,
	.hw_params =   snd_p16v_pcm_hw_params_playback,
	.hw_free =     snd_p16v_pcm_hw_free_playback,
	.prepare =     snd_p16v_pcm_prepare_playback,
	.trigger =     snd_p16v_pcm_trigger_playback,
	.pointer =     snd_p16v_pcm_pointer_playback,
};

static struct snd_pcm_ops snd_p16v_capture_ops = {
	.open =        snd_p16v_pcm_open_capture,
	.close =       snd_p16v_pcm_close_capture,
	.ioctl =       snd_pcm_lib_ioctl,
	.hw_params =   snd_p16v_pcm_hw_params_capture,
	.hw_free =     snd_p16v_pcm_hw_free_capture,
	.prepare =     snd_p16v_pcm_prepare_capture,
	.trigger =     snd_p16v_pcm_trigger_capture,
	.pointer =     snd_p16v_pcm_pointer_capture,
};


int snd_p16v_free(struct snd_emu10k1 *chip)
{
	// release the data
	if (chip->p16v_buffer.area) {
		snd_dma_free_pages(&chip->p16v_buffer);
		//snd_printk("period lables free: %p\n", &chip->p16v_buffer);
	}
	return 0;
}

int __devinit snd_p16v_pcm(struct snd_emu10k1 *emu, int device, struct snd_pcm **rpcm)
{
	struct snd_pcm *pcm;
	struct snd_pcm_substream *substream;
	int err;
        int capture=1;
  
	//snd_printk("snd_p16v_pcm called. device=%d\n", device);
	emu->p16v_device_offset = device;
	if (rpcm)
		*rpcm = NULL;

	if ((err = snd_pcm_new(emu->card, "p16v", device, 1, capture, &pcm)) < 0)
		return err;
  
	pcm->private_data = emu;
	// Single playback 8 channel device.
	// Single capture 2 channel device.
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_p16v_playback_front_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_p16v_capture_ops);

	pcm->info_flags = 0;
	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
	strcpy(pcm->name, "p16v");
	emu->pcm_p16v = pcm;

	for(substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; 
	    substream; 
	    substream = substream->next) {
		if ((err = snd_pcm_lib_preallocate_pages(substream, 
							 SNDRV_DMA_TYPE_DEV, 
							 snd_dma_pci_data(emu->pci), 
							 ((65536 - 64) * 8), ((65536 - 64) * 8))) < 0) 
			return err;
		//snd_printk("preallocate playback substream: err=%d\n", err);
	}

	for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; 
	      substream; 
	      substream = substream->next) {
 		if ((err = snd_pcm_lib_preallocate_pages(substream, 
	                                           SNDRV_DMA_TYPE_DEV, 
	                                           snd_dma_pci_data(emu->pci), 
	                                           65536 - 64, 65536 - 64)) < 0)
			return err;
		//snd_printk("preallocate capture substream: err=%d\n", err);
	}
  
	if (rpcm)
		*rpcm = pcm;
  
	return 0;
}

static int snd_p16v_volume_info(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_info *uinfo)
{
        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = 2;
        uinfo->value.integer.min = 0;
        uinfo->value.integer.max = 255;
        return 0;
}

static int snd_p16v_volume_get(struct snd_kcontrol *kcontrol,
			       struct snd_ctl_elem_value *ucontrol)
{
        struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
	int high_low = (kcontrol->private_value >> 8) & 0xff;
	int reg = kcontrol->private_value & 0xff;
	u32 value;

	value = snd_emu10k1_ptr20_read(emu, reg, high_low);
	if (high_low) {
		ucontrol->value.integer.value[0] = 0xff - ((value >> 24) & 0xff); /* Left */
		ucontrol->value.integer.value[1] = 0xff - ((value >> 16) & 0xff); /* Right */
	} else {
		ucontrol->value.integer.value[0] = 0xff - ((value >> 8) & 0xff); /* Left */
		ucontrol->value.integer.value[1] = 0xff - ((value >> 0) & 0xff); /* Right */
	}
	return 0;
}

static int snd_p16v_volume_put(struct snd_kcontrol *kcontrol,
			       struct snd_ctl_elem_value *ucontrol)
{
        struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
	int high_low = (kcontrol->private_value >> 8) & 0xff;
	int reg = kcontrol->private_value & 0xff;
        u32 value, oval;

	oval = value = snd_emu10k1_ptr20_read(emu, reg, 0);
	if (high_low == 1) {
		value &= 0xffff;
		value |= ((0xff - ucontrol->value.integer.value[0]) << 24) |
			((0xff - ucontrol->value.integer.value[1]) << 16);
	} else {
		value &= 0xffff0000;
		value |= ((0xff - ucontrol->value.integer.value[0]) << 8) |
			((0xff - ucontrol->value.integer.value[1]) );
	}
	if (value != oval) {
		snd_emu10k1_ptr20_write(emu, reg, 0, value);
		return 1;
	}
	return 0;
}

static int snd_p16v_capture_source_info(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_info *uinfo)
{
	static char *texts[8] = {
		"SPDIF", "I2S", "SRC48", "SRCMulti_SPDIF", "SRCMulti_I2S",
		"CDIF", "FX", "AC97"
	};

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 8;
	if (uinfo->value.enumerated.item > 7)
                uinfo->value.enumerated.item = 7;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_p16v_capture_source_get(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_value *ucontrol)
{
	struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);

	ucontrol->value.enumerated.item[0] = emu->p16v_capture_source;
	return 0;
}

static int snd_p16v_capture_source_put(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_value *ucontrol)
{
	struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
	unsigned int val;
	int change = 0;
	u32 mask;
	u32 source;

	val = ucontrol->value.enumerated.item[0] ;
	change = (emu->p16v_capture_source != val);
	if (change) {
		emu->p16v_capture_source = val;
		source = (val << 28) | (val << 24) | (val << 20) | (val << 16);
		mask = snd_emu10k1_ptr20_read(emu, BASIC_INTERRUPT, 0) & 0xffff;
		snd_emu10k1_ptr20_write(emu, BASIC_INTERRUPT, 0, source | mask);
	}
        return change;
}

static int snd_p16v_capture_channel_info(struct snd_kcontrol *kcontrol,
					 struct snd_ctl_elem_info *uinfo)
{
	static char *texts[4] = { "0", "1", "2", "3",  };

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 4;
	if (uinfo->value.enumerated.item > 3)
                uinfo->value.enumerated.item = 3;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_p16v_capture_channel_get(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_value *ucontrol)
{
	struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);

	ucontrol->value.enumerated.item[0] = emu->p16v_capture_channel;
	return 0;
}

static int snd_p16v_capture_channel_put(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_value *ucontrol)
{
	struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
	unsigned int val;
	int change = 0;
	u32 tmp;

	val = ucontrol->value.enumerated.item[0] ;
	change = (emu->p16v_capture_channel != val);
	if (change) {
		emu->p16v_capture_channel = val;
		tmp = snd_emu10k1_ptr20_read(emu, CAPTURE_P16V_SOURCE, 0) & 0xfffc;
		snd_emu10k1_ptr20_write(emu, CAPTURE_P16V_SOURCE, 0, tmp | val);
	}
        return change;
}

#define P16V_VOL(xname,xreg,xhl) { \
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
	.info = snd_p16v_volume_info, \
	.get = snd_p16v_volume_get, \
	.put = snd_p16v_volume_put, \
	.private_value = ((xreg) | ((xhl) << 8)) \
}

static struct snd_kcontrol_new p16v_mixer_controls[] __devinitdata = {
	P16V_VOL("HD Analog Front Playback Volume", PLAYBACK_VOLUME_MIXER9, 0),
	P16V_VOL("HD Analog Rear Playback Volume", PLAYBACK_VOLUME_MIXER10, 1),
	P16V_VOL("HD Analog Center/LFE Playback Volume", PLAYBACK_VOLUME_MIXER9, 1),
	P16V_VOL("HD Analog Side Playback Volume", PLAYBACK_VOLUME_MIXER10, 0),
	P16V_VOL("HD SPDIF Front Playback Volume", PLAYBACK_VOLUME_MIXER7, 0),
	P16V_VOL("HD SPDIF Rear Playback Volume", PLAYBACK_VOLUME_MIXER8, 1),
	P16V_VOL("HD SPDIF Center/LFE Playback Volume", PLAYBACK_VOLUME_MIXER7, 1),
	P16V_VOL("HD SPDIF Side Playback Volume", PLAYBACK_VOLUME_MIXER8, 0),
	{
		.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
		.name =		"HD source Capture",
		.info =		snd_p16v_capture_source_info,
		.get =		snd_p16v_capture_source_get,
		.put =		snd_p16v_capture_source_put
	},
	{
		.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
		.name =		"HD channel Capture",
		.info =		snd_p16v_capture_channel_info,
		.get =		snd_p16v_capture_channel_get,
		.put =		snd_p16v_capture_channel_put
	},
};


int __devinit snd_p16v_mixer(struct snd_emu10k1 *emu)
{
	int i, err;
        struct snd_card *card = emu->card;

	for (i = 0; i < ARRAY_SIZE(p16v_mixer_controls); i++) {
		if ((err = snd_ctl_add(card, snd_ctl_new1(&p16v_mixer_controls[i],
							  emu))) < 0)
			return err;
	}
        return 0;
}

#ifdef CONFIG_PM

#define NUM_CHS	1	/* up to 4, but only first channel is used */

int __devinit snd_p16v_alloc_pm_buffer(struct snd_emu10k1 *emu)
{
	emu->p16v_saved = vmalloc(NUM_CHS * 4 * 0x80);
	if (! emu->p16v_saved)
		return -ENOMEM;
	return 0;
}

void snd_p16v_free_pm_buffer(struct snd_emu10k1 *emu)
{
	vfree(emu->p16v_saved);
}

void snd_p16v_suspend(struct snd_emu10k1 *emu)
{
	int i, ch;
	unsigned int *val;

	val = emu->p16v_saved;
	for (ch = 0; ch < NUM_CHS; ch++)
		for (i = 0; i < 0x80; i++, val++)
			*val = snd_emu10k1_ptr20_read(emu, i, ch);
}

void snd_p16v_resume(struct snd_emu10k1 *emu)
{
	int i, ch;
	unsigned int *val;

	val = emu->p16v_saved;
	for (ch = 0; ch < NUM_CHS; ch++)
		for (i = 0; i < 0x80; i++, val++)
			snd_emu10k1_ptr20_write(emu, i, ch, *val);
}
#endif