pcxhr_mixer.c

linux2.6.16版本

				struct snd_ctl_elem_value *ucontrol)
{
	struct pcxhr_mgr *mgr = snd_kcontrol_chip(kcontrol);
	int i, err, rate;

	down(&mgr->mixer_mutex);
	for(i = 0; i < 3 + mgr->capture_chips; i++) {
		if (i == PCXHR_CLOCK_TYPE_INTERNAL)
			rate = mgr->sample_rate_real;
		else {
			err = pcxhr_get_external_clock(mgr, i, &rate);
			if (err)
				break;
		}
		ucontrol->value.integer.value[i] = rate;
	}
	up(&mgr->mixer_mutex);
	return 0;
}

static struct snd_kcontrol_new pcxhr_control_clock_rate = {
	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
	.iface =	SNDRV_CTL_ELEM_IFACE_CARD,
	.name =		"Clock Rates",
	.info =		pcxhr_clock_rate_info,
	.get =		pcxhr_clock_rate_get,
};

/*
 * IEC958 status bits
 */
static int pcxhr_iec958_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
	uinfo->count = 1;
	return 0;
}

static int pcxhr_iec958_capture_byte(struct snd_pcxhr *chip, int aes_idx, unsigned char* aes_bits)
{
	int i, err;
	unsigned char temp;
	struct pcxhr_rmh rmh;

	pcxhr_init_rmh(&rmh, CMD_ACCESS_IO_READ);
	rmh.cmd[0] |= IO_NUM_UER_CHIP_REG;
	switch (chip->chip_idx) {
	case 0:	rmh.cmd[1] = CS8420_01_CS; break;	/* use CS8416_01_CS for AES SYNC plug */
	case 1:	rmh.cmd[1] = CS8420_23_CS; break;
	case 2:	rmh.cmd[1] = CS8420_45_CS; break;
	case 3:	rmh.cmd[1] = CS8420_67_CS; break;
	default: return -EINVAL;
	}
	switch (aes_idx) {
	case 0:	rmh.cmd[2] = CS8420_CSB0; break;	/* use CS8416_CSBx for AES SYNC plug */
	case 1:	rmh.cmd[2] = CS8420_CSB1; break;
	case 2:	rmh.cmd[2] = CS8420_CSB2; break;
	case 3:	rmh.cmd[2] = CS8420_CSB3; break;
	case 4:	rmh.cmd[2] = CS8420_CSB4; break;
	default: return -EINVAL;
	}
	rmh.cmd[1] &= 0x0fffff;			/* size and code the chip id for the fpga */
	rmh.cmd[2] &= CHIP_SIG_AND_MAP_SPI;	/* chip signature + map for spi read */
	rmh.cmd_len = 3;
	err = pcxhr_send_msg(chip->mgr, &rmh);
	if (err)
		return err;
	temp = 0;
	for (i = 0; i < 8; i++) {
		/* attention : reversed bit order (not with CS8416_01_CS) */
		temp <<= 1;
		if (rmh.stat[1] & (1 << i))
			temp |= 1;
	}
	snd_printdd("read iec958 AES %d byte %d = 0x%x\n", chip->chip_idx, aes_idx, temp);
	*aes_bits = temp;
	return 0;
}

static int pcxhr_iec958_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
	unsigned char aes_bits;
	int i, err;

	down(&chip->mgr->mixer_mutex);
	for(i = 0; i < 5; i++) {
		if (kcontrol->private_value == 0)	/* playback */
			aes_bits = chip->aes_bits[i];
		else {				/* capture */
			err = pcxhr_iec958_capture_byte(chip, i, &aes_bits);
			if (err)
				break;
		}
		ucontrol->value.iec958.status[i] = aes_bits;
	}
	up(&chip->mgr->mixer_mutex);
        return 0;
}

static int pcxhr_iec958_mask_get(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
	int i;
	for (i = 0; i < 5; i++)
		ucontrol->value.iec958.status[i] = 0xff;
        return 0;
}

static int pcxhr_iec958_update_byte(struct snd_pcxhr *chip, int aes_idx, unsigned char aes_bits)
{
	int i, err, cmd;
	unsigned char new_bits = aes_bits;
	unsigned char old_bits = chip->aes_bits[aes_idx];
	struct pcxhr_rmh rmh;

	for (i = 0; i < 8; i++) {
		if ((old_bits & 0x01) != (new_bits & 0x01)) {
			cmd = chip->chip_idx & 0x03;		/* chip index 0..3 */
			if(chip->chip_idx > 3)
				/* new bit used if chip_idx>3 (PCX1222HR) */
				cmd |= 1 << 22;
			cmd |= ((aes_idx << 3) + i) << 2;	/* add bit offset */
			cmd |= (new_bits & 0x01) << 23;		/* add bit value */
			pcxhr_init_rmh(&rmh, CMD_ACCESS_IO_WRITE);
			rmh.cmd[0] |= IO_NUM_REG_CUER;
			rmh.cmd[1] = cmd;
			rmh.cmd_len = 2;
			snd_printdd("write iec958 AES %d byte %d bit %d (cmd %x)\n",
				    chip->chip_idx, aes_idx, i, cmd);
			err = pcxhr_send_msg(chip->mgr, &rmh);
			if (err)
				return err;
		}
		old_bits >>= 1;
		new_bits >>= 1;
	}
	chip->aes_bits[aes_idx] = aes_bits;
	return 0;
}

static int pcxhr_iec958_put(struct snd_kcontrol *kcontrol,
			    struct snd_ctl_elem_value *ucontrol)
{
	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
	int i, changed = 0;

	/* playback */
	down(&chip->mgr->mixer_mutex);
	for (i = 0; i < 5; i++) {
		if (ucontrol->value.iec958.status[i] != chip->aes_bits[i]) {
			pcxhr_iec958_update_byte(chip, i, ucontrol->value.iec958.status[i]);
			changed = 1;
		}
	}
	up(&chip->mgr->mixer_mutex);
	return changed;
}

static struct snd_kcontrol_new pcxhr_control_playback_iec958_mask = {
	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
	.info =		pcxhr_iec958_info,
	.get =		pcxhr_iec958_mask_get
};
static struct snd_kcontrol_new pcxhr_control_playback_iec958 = {
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
	.info =         pcxhr_iec958_info,
	.get =          pcxhr_iec958_get,
	.put =          pcxhr_iec958_put,
	.private_value = 0 /* playback */
};

static struct snd_kcontrol_new pcxhr_control_capture_iec958_mask = {
	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =		SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
	.info =		pcxhr_iec958_info,
	.get =		pcxhr_iec958_mask_get
};
static struct snd_kcontrol_new pcxhr_control_capture_iec958 = {
	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
	.name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
	.info =         pcxhr_iec958_info,
	.get =          pcxhr_iec958_get,
	.private_value = 1 /* capture */
};

static void pcxhr_init_audio_levels(struct snd_pcxhr *chip)
{
	int i;

	for (i = 0; i < 2; i++) {
		if (chip->nb_streams_play) {
			int j;
			/* at boot time the digital volumes are unmuted 0dB */
			for (j = 0; j < PCXHR_PLAYBACK_STREAMS; j++) {
				chip->digital_playback_active[j][i] = 1;
				chip->digital_playback_volume[j][i] = PCXHR_DIGITAL_ZERO_LEVEL;
			}
			/* after boot, only two bits are set on the uer interface */
			chip->aes_bits[0] = IEC958_AES0_PROFESSIONAL | IEC958_AES0_PRO_FS_48000;
/* only for test purpose, remove later */
#ifdef CONFIG_SND_DEBUG
			/* analog volumes for playback (is LEVEL_MIN after boot) */
			chip->analog_playback_active[i] = 1;
			chip->analog_playback_volume[i] = PCXHR_ANALOG_PLAYBACK_ZERO_LEVEL;
			pcxhr_update_analog_audio_level(chip, 0, i);
#endif
/* test end */
		}
		if (chip->nb_streams_capt) {
			/* at boot time the digital volumes are unmuted 0dB */
			chip->digital_capture_volume[i] = PCXHR_DIGITAL_ZERO_LEVEL;
/* only for test purpose, remove later */
#ifdef CONFIG_SND_DEBUG
			/* analog volumes for playback (is LEVEL_MIN after boot) */
			chip->analog_capture_volume[i]  = PCXHR_ANALOG_CAPTURE_ZERO_LEVEL;
			pcxhr_update_analog_audio_level(chip, 1, i);
#endif
/* test end */
		}
	}

	return;
}


int pcxhr_create_mixer(struct pcxhr_mgr *mgr)
{
	struct snd_pcxhr *chip;
	int err, i;

	init_MUTEX(&mgr->mixer_mutex); /* can be in another place */

	for (i = 0; i < mgr->num_cards; i++) {
		struct snd_kcontrol_new temp;
		chip = mgr->chip[i];

		if (chip->nb_streams_play) {
			/* analog output level control */
			temp = pcxhr_control_analog_level;
			temp.name = "Master Playback Volume";
			temp.private_value = 0; /* playback */
			if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&temp, chip))) < 0)
				return err;
			/* output mute controls */
			if ((err = snd_ctl_add(chip->card,
					       snd_ctl_new1(&pcxhr_control_output_switch,
							    chip))) < 0)
				return err;
			
			temp = snd_pcxhr_pcm_vol;
			temp.name = "PCM Playback Volume";
			temp.count = PCXHR_PLAYBACK_STREAMS;
			temp.private_value = 0; /* playback */
			if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&temp, chip))) < 0)
				return err;

			if ((err = snd_ctl_add(chip->card,
					       snd_ctl_new1(&pcxhr_control_pcm_switch,
							    chip))) < 0)
				return err;

			/* IEC958 controls */
			if ((err = snd_ctl_add(chip->card,
					       snd_ctl_new1(&pcxhr_control_playback_iec958_mask,
							    chip))) < 0)
				return err;
			if ((err = snd_ctl_add(chip->card,
					       snd_ctl_new1(&pcxhr_control_playback_iec958,
							    chip))) < 0)
				return err;
		}
		if (chip->nb_streams_capt) {
			/* analog input level control only on first two chips !*/
			temp = pcxhr_control_analog_level;
			temp.name = "Master Capture Volume";
			temp.private_value = 1; /* capture */
			if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&temp, chip))) < 0)
				return err;

			temp = snd_pcxhr_pcm_vol;
			temp.name = "PCM Capture Volume";
			temp.count = 1;
			temp.private_value = 1; /* capture */
			if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&temp, chip))) < 0)
				return err;
			/* Audio source */
			if ((err = snd_ctl_add(chip->card,
					       snd_ctl_new1(&pcxhr_control_audio_src,
							    chip))) < 0)
				return err;
			/* IEC958 controls */
			if ((err = snd_ctl_add(chip->card,
					       snd_ctl_new1(&pcxhr_control_capture_iec958_mask,
							    chip))) < 0)
				return err;
			if ((err = snd_ctl_add(chip->card,
					       snd_ctl_new1(&pcxhr_control_capture_iec958,
							    chip))) < 0)
				return err;
		}
		/* monitoring only if playback and capture device available */
		if (chip->nb_streams_capt > 0 && chip->nb_streams_play > 0) {
			/* monitoring */
			if ((err = snd_ctl_add(chip->card,
					       snd_ctl_new1(&pcxhr_control_monitor_vol,
							    chip))) < 0)
				return err;
			if ((err = snd_ctl_add(chip->card,
					       snd_ctl_new1(&pcxhr_control_monitor_sw,
							    chip))) < 0)
				return err;
		}

		if (i == 0) {
			/* clock mode only one control per pcxhr */
			if ((err = snd_ctl_add(chip->card,
					       snd_ctl_new1(&pcxhr_control_clock_type,
							    mgr))) < 0)
				return err;
			/* non standard control used to scan the external clock presence/frequencies */
			if ((err = snd_ctl_add(chip->card,
					       snd_ctl_new1(&pcxhr_control_clock_rate,
							    mgr))) < 0)
				return err;
		}

		/* init values for the mixer data */
		pcxhr_init_audio_levels(chip);
	}

	return 0;
}