ac97_codec.c

linux 内核源代码

	mute_mask = 0x8000;
	val = snd_ac97_read(ac97, reg);
	if (check_stereo || (ac97->flags & AC97_STEREO_MUTES)) {
		/* check whether both mute bits work */
		val1 = val | 0x8080;
		snd_ac97_write(ac97, reg, val1);
		if (val1 == snd_ac97_read(ac97, reg))
			mute_mask = 0x8080;
	}
	if (mute_mask == 0x8080) {
		struct snd_kcontrol_new tmp = AC97_DOUBLE(name, reg, 15, 7, 1, 1);
		if (check_amix)
			tmp.private_value |= (1 << 30);
		tmp.index = ac97->num;
		kctl = snd_ctl_new1(&tmp, ac97);
	} else {
		struct snd_kcontrol_new tmp = AC97_SINGLE(name, reg, 15, 1, 1);
		if (check_amix)
			tmp.private_value |= (1 << 30);
		tmp.index = ac97->num;
		kctl = snd_ctl_new1(&tmp, ac97);
	}
	err = snd_ctl_add(card, kctl);
	if (err < 0)
		return err;
	/* mute as default */
	snd_ac97_write_cache(ac97, reg, val | mute_mask);
	return 0;
}

/*
 * set dB information
 */
static const DECLARE_TLV_DB_SCALE(db_scale_4bit, -4500, 300, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_5bit, -4650, 150, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_6bit, -9450, 150, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_5bit_12db_max, -3450, 150, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_rec_gain, 0, 150, 0);

static const unsigned int *find_db_scale(unsigned int maxval)
{
	switch (maxval) {
	case 0x0f: return db_scale_4bit;
	case 0x1f: return db_scale_5bit;
	case 0x3f: return db_scale_6bit;
	}
	return NULL;
}

static void set_tlv_db_scale(struct snd_kcontrol *kctl, const unsigned int *tlv)
{
	kctl->tlv.p = tlv;
	if (tlv)
		kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
}

/*
 * create a volume for normal stereo/mono controls
 */
static int snd_ac97_cvol_new(struct snd_card *card, char *name, int reg, unsigned int lo_max,
			     unsigned int hi_max, struct snd_ac97 *ac97)
{
	int err;
	struct snd_kcontrol *kctl;

	if (! snd_ac97_valid_reg(ac97, reg))
		return 0;
	if (hi_max) {
		/* invert */
		struct snd_kcontrol_new tmp = AC97_DOUBLE(name, reg, 8, 0, lo_max, 1);
		tmp.index = ac97->num;
		kctl = snd_ctl_new1(&tmp, ac97);
	} else {
		/* invert */
		struct snd_kcontrol_new tmp = AC97_SINGLE(name, reg, 0, lo_max, 1);
		tmp.index = ac97->num;
		kctl = snd_ctl_new1(&tmp, ac97);
	}
	if (reg >= AC97_PHONE && reg <= AC97_PCM)
		set_tlv_db_scale(kctl, db_scale_5bit_12db_max);
	else
		set_tlv_db_scale(kctl, find_db_scale(lo_max));
	err = snd_ctl_add(card, kctl);
	if (err < 0)
		return err;
	snd_ac97_write_cache(ac97, reg,
			     (snd_ac97_read(ac97, reg) & 0x8080) |
			     lo_max | (hi_max << 8));
	return 0;
}

/*
 * create a mute-switch and a volume for normal stereo/mono controls
 */
static int snd_ac97_cmix_new_stereo(struct snd_card *card, const char *pfx,
				    int reg, int check_stereo, int check_amix,
				    struct snd_ac97 *ac97)
{
	int err;
	char name[44];
	unsigned char lo_max, hi_max;

	if (! snd_ac97_valid_reg(ac97, reg))
		return 0;

	if (snd_ac97_try_bit(ac97, reg, 15)) {
		sprintf(name, "%s Switch", pfx);
		if ((err = snd_ac97_cmute_new_stereo(card, name, reg,
						     check_stereo, check_amix,
						     ac97)) < 0)
			return err;
	}
	check_volume_resolution(ac97, reg, &lo_max, &hi_max);
	if (lo_max) {
		sprintf(name, "%s Volume", pfx);
		if ((err = snd_ac97_cvol_new(card, name, reg, lo_max, hi_max, ac97)) < 0)
			return err;
	}
	return 0;
}

#define snd_ac97_cmix_new(card, pfx, reg, acheck, ac97) \
	snd_ac97_cmix_new_stereo(card, pfx, reg, 0, acheck, ac97)
#define snd_ac97_cmute_new(card, name, reg, acheck, ac97) \
	snd_ac97_cmute_new_stereo(card, name, reg, 0, acheck, ac97)

static unsigned int snd_ac97_determine_spdif_rates(struct snd_ac97 *ac97);

static int snd_ac97_mixer_build(struct snd_ac97 * ac97)
{
	struct snd_card *card = ac97->bus->card;
	struct snd_kcontrol *kctl;
	int err;
	unsigned int idx;
	unsigned char max;

	/* build master controls */
	/* AD claims to remove this control from AD1887, although spec v2.2 does not allow this */
	if (snd_ac97_try_volume_mix(ac97, AC97_MASTER)) {
		if (ac97->flags & AC97_HAS_NO_MASTER_VOL)
			err = snd_ac97_cmute_new(card, "Master Playback Switch",
						 AC97_MASTER, 0, ac97);
		else
			err = snd_ac97_cmix_new(card, "Master Playback",
						AC97_MASTER, 0, ac97);
		if (err < 0)
			return err;
	}

	ac97->regs[AC97_CENTER_LFE_MASTER] = 0x8080;

	/* build center controls */
	if ((snd_ac97_try_volume_mix(ac97, AC97_CENTER_LFE_MASTER)) 
		&& !(ac97->flags & AC97_AD_MULTI)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_center[0], ac97))) < 0)
			return err;
		if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_center[1], ac97))) < 0)
			return err;
		snd_ac97_change_volume_params2(ac97, AC97_CENTER_LFE_MASTER, 0, &max);
		kctl->private_value &= ~(0xff << 16);
		kctl->private_value |= (int)max << 16;
		set_tlv_db_scale(kctl, find_db_scale(max));
		snd_ac97_write_cache(ac97, AC97_CENTER_LFE_MASTER, ac97->regs[AC97_CENTER_LFE_MASTER] | max);
	}

	/* build LFE controls */
	if ((snd_ac97_try_volume_mix(ac97, AC97_CENTER_LFE_MASTER+1))
		&& !(ac97->flags & AC97_AD_MULTI)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_lfe[0], ac97))) < 0)
			return err;
		if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_lfe[1], ac97))) < 0)
			return err;
		snd_ac97_change_volume_params2(ac97, AC97_CENTER_LFE_MASTER, 8, &max);
		kctl->private_value &= ~(0xff << 16);
		kctl->private_value |= (int)max << 16;
		set_tlv_db_scale(kctl, find_db_scale(max));
		snd_ac97_write_cache(ac97, AC97_CENTER_LFE_MASTER, ac97->regs[AC97_CENTER_LFE_MASTER] | max << 8);
	}

	/* build surround controls */
	if ((snd_ac97_try_volume_mix(ac97, AC97_SURROUND_MASTER)) 
		&& !(ac97->flags & AC97_AD_MULTI)) {
		/* Surround Master (0x38) is with stereo mutes */
		if ((err = snd_ac97_cmix_new_stereo(card, "Surround Playback",
						    AC97_SURROUND_MASTER, 1, 0,
						    ac97)) < 0)
			return err;
	}

	/* build headphone controls */
	if (snd_ac97_try_volume_mix(ac97, AC97_HEADPHONE)) {
		if ((err = snd_ac97_cmix_new(card, "Headphone Playback",
					     AC97_HEADPHONE, 0, ac97)) < 0)
			return err;
	}
	
	/* build master mono controls */
	if (snd_ac97_try_volume_mix(ac97, AC97_MASTER_MONO)) {
		if ((err = snd_ac97_cmix_new(card, "Master Mono Playback",
					     AC97_MASTER_MONO, 0, ac97)) < 0)
			return err;
	}
	
	/* build master tone controls */
	if (!(ac97->flags & AC97_HAS_NO_TONE)) {
		if (snd_ac97_try_volume_mix(ac97, AC97_MASTER_TONE)) {
			for (idx = 0; idx < 2; idx++) {
				if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_tone[idx], ac97))) < 0)
					return err;
				if (ac97->id == AC97_ID_YMF743 ||
				    ac97->id == AC97_ID_YMF753) {
					kctl->private_value &= ~(0xff << 16);
					kctl->private_value |= 7 << 16;
				}
			}
			snd_ac97_write_cache(ac97, AC97_MASTER_TONE, 0x0f0f);
		}
	}
	
	/* build PC Speaker controls */
	if (!(ac97->flags & AC97_HAS_NO_PC_BEEP) && 
		((ac97->flags & AC97_HAS_PC_BEEP) ||
	    snd_ac97_try_volume_mix(ac97, AC97_PC_BEEP))) {
		for (idx = 0; idx < 2; idx++)
			if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_pc_beep[idx], ac97))) < 0)
				return err;
		set_tlv_db_scale(kctl, db_scale_4bit);
		snd_ac97_write_cache(ac97, AC97_PC_BEEP,
				     snd_ac97_read(ac97, AC97_PC_BEEP) | 0x801e);
	}
	
	/* build Phone controls */
	if (!(ac97->flags & AC97_HAS_NO_PHONE)) {
		if (snd_ac97_try_volume_mix(ac97, AC97_PHONE)) {
			if ((err = snd_ac97_cmix_new(card, "Phone Playback",
						     AC97_PHONE, 1, ac97)) < 0)
				return err;
		}
	}
	
	/* build MIC controls */
	if (!(ac97->flags & AC97_HAS_NO_MIC)) {
		if (snd_ac97_try_volume_mix(ac97, AC97_MIC)) {
			if ((err = snd_ac97_cmix_new(card, "Mic Playback",
						     AC97_MIC, 1, ac97)) < 0)
				return err;
			if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_mic_boost, ac97))) < 0)
				return err;
		}
	}

	/* build Line controls */
	if (snd_ac97_try_volume_mix(ac97, AC97_LINE)) {
		if ((err = snd_ac97_cmix_new(card, "Line Playback",
					     AC97_LINE, 1, ac97)) < 0)
			return err;
	}
	
	/* build CD controls */
	if (!(ac97->flags & AC97_HAS_NO_CD)) {
		if (snd_ac97_try_volume_mix(ac97, AC97_CD)) {
			if ((err = snd_ac97_cmix_new(card, "CD Playback",
						     AC97_CD, 1, ac97)) < 0)
				return err;
		}
	}
	
	/* build Video controls */
	if (!(ac97->flags & AC97_HAS_NO_VIDEO)) {
		if (snd_ac97_try_volume_mix(ac97, AC97_VIDEO)) {
			if ((err = snd_ac97_cmix_new(card, "Video Playback",
						     AC97_VIDEO, 1, ac97)) < 0)
				return err;
		}
	}

	/* build Aux controls */
	if (!(ac97->flags & AC97_HAS_NO_AUX)) {
		if (snd_ac97_try_volume_mix(ac97, AC97_AUX)) {
			if ((err = snd_ac97_cmix_new(card, "Aux Playback",
						     AC97_AUX, 1, ac97)) < 0)
				return err;
		}
	}

	/* build PCM controls */
	if (ac97->flags & AC97_AD_MULTI) {
		unsigned short init_val;
		if (ac97->flags & AC97_STEREO_MUTES)
			init_val = 0x9f9f;
		else
			init_val = 0x9f1f;
		for (idx = 0; idx < 2; idx++)
			if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_ad18xx_pcm[idx], ac97))) < 0)
				return err;
		set_tlv_db_scale(kctl, db_scale_5bit);
		ac97->spec.ad18xx.pcmreg[0] = init_val;
		if (ac97->scaps & AC97_SCAP_SURROUND_DAC) {
			for (idx = 0; idx < 2; idx++)
				if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_ad18xx_surround[idx], ac97))) < 0)
					return err;
			set_tlv_db_scale(kctl, db_scale_5bit);
			ac97->spec.ad18xx.pcmreg[1] = init_val;
		}
		if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC) {
			for (idx = 0; idx < 2; idx++)
				if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_ad18xx_center[idx], ac97))) < 0)
					return err;
			set_tlv_db_scale(kctl, db_scale_5bit);
			for (idx = 0; idx < 2; idx++)
				if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_ad18xx_lfe[idx], ac97))) < 0)
					return err;
			set_tlv_db_scale(kctl, db_scale_5bit);
			ac97->spec.ad18xx.pcmreg[2] = init_val;
		}
		snd_ac97_write_cache(ac97, AC97_PCM, init_val);
	} else {
		if (!(ac97->flags & AC97_HAS_NO_STD_PCM)) {
			if (ac97->flags & AC97_HAS_NO_PCM_VOL)
				err = snd_ac97_cmute_new(card,
							 "PCM Playback Switch",
							 AC97_PCM, 0, ac97);
			else
				err = snd_ac97_cmix_new(card, "PCM Playback",
							AC97_PCM, 0, ac97);
			if (err < 0)
				return err;
		}
	}

	/* build Capture controls */
	if (!(ac97->flags & AC97_HAS_NO_REC_GAIN)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_control_capture_src, ac97))) < 0)
			return err;
		if (snd_ac97_try_bit(ac97, AC97_REC_GAIN, 15)) {
			err = snd_ac97_cmute_new(card, "Capture Switch",
						 AC97_REC_GAIN, 0, ac97);
			if (err < 0)
				return err;
		}
		if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_control_capture_vol, ac97))) < 0)
			return err;
		set_tlv_db_scale(kctl, db_scale_rec_gain);
		snd_ac97_write_cache(ac97, AC97_REC_SEL, 0x0000);
		snd_ac97_write_cache(ac97, AC97_REC_GAIN, 0x0000);
	}
	/* build MIC Capture controls */
	if (snd_ac97_try_volume_mix(ac97, AC97_REC_GAIN_MIC)) {
		for (idx = 0; idx < 2; idx++)
			if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_mic_capture[idx], ac97))) < 0)
				return err;
		set_tlv_db_scale(kctl, db_scale_rec_gain);
		snd_ac97_write_cache(ac97, AC97_REC_GAIN_MIC, 0x0000);
	}

	/* build PCM out path & mute control */
	if (snd_ac97_try_bit(ac97, AC97_GENERAL_PURPOSE, 15)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_general[AC97_GENERAL_PCM_OUT], ac97))) < 0)
			return err;
	}

	/* build Simulated Stereo Enhancement control */
	if (ac97->caps & 0x0008) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_general[AC97_GENERAL_STEREO_ENHANCEMENT], ac97))) < 0)
			return err;
	}

	/* build 3D Stereo Enhancement control */
	if (snd_ac97_try_bit(ac97, AC97_GENERAL_PURPOSE, 13)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_general[AC97_GENERAL_3D], ac97))) < 0)
			return err;
	}

	/* build Loudness control */
	if (ac97->caps & 0x0020) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_general[AC97_GENERAL_LOUDNESS], ac97))) < 0)
			return err;
	}

	/* build Mono output select control */
	if (snd_ac97_try_bit(ac97, AC97_GENERAL_PURPOSE, 9)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_general[AC97_GENERAL_MONO], ac97))) < 0)
			return err;
	}

	/* build Mic select control */
	if (snd_ac97_try_bit(ac97, AC97_GENERAL_PURPOSE, 8)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_general[AC97_GENERAL_MIC], ac97))) < 0)
			return err;
	}