ac97_codec.c

是关于linux2.5.1的完全源码

	static char *texts3[2] = { "Mic1", "Mic2" };
	char **texts = NULL;
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;

	switch (reg) {
	case AC97_GENERAL_PURPOSE:
		switch (shift) {
		case 15: texts = texts1; break;
		case 9: texts = texts2; break;
		case 8: texts = texts3; break;
		}
	}
	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 2;
	if (uinfo->value.enumerated.item > 1)
		uinfo->value.enumerated.item = 1;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_ac97_get_enum_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ac97_t *ac97 = snd_kcontrol_chip(kcontrol);
	unsigned short val;
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	
	val = (ac97->regs[reg] >> shift) & 1;
	if (invert)
		val ^= 1;
	ucontrol->value.enumerated.item[0] = val;
	return 0;
}

static int snd_ac97_put_enum_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ac97_t *ac97 = snd_kcontrol_chip(kcontrol);
	unsigned short val;
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	
	if (ucontrol->value.enumerated.item[0] > 1)
		return -EINVAL;
	val = !!ucontrol->value.enumerated.item[0];
	if (invert)
		val = !val;
	return snd_ac97_update_bits(ac97, reg, 1 << shift, val << shift);
}

#define AC97_SINGLE(xname, reg, shift, mask, invert) \
{ iface: SNDRV_CTL_ELEM_IFACE_MIXER, name: xname, info: snd_ac97_info_single, \
  get: snd_ac97_get_single, put: snd_ac97_put_single, \
  private_value: reg | (shift << 8) | (mask << 16) | (invert << 24) }

static int snd_ac97_info_single(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	int mask = (kcontrol->private_value >> 16) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_ac97_get_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ac97_t *ac97 = snd_kcontrol_chip(kcontrol);
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	
	ucontrol->value.integer.value[0] = (ac97->regs[reg] >> shift) & mask;
	if (invert)
		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
	return 0;
}

static int snd_ac97_put_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ac97_t *ac97 = snd_kcontrol_chip(kcontrol);
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	unsigned short val;
	
	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
		val = mask - val;
	return snd_ac97_update_bits(ac97, reg, mask << shift, val << shift);
}

#define AC97_DOUBLE(xname, reg, shift_left, shift_right, mask, invert) \
{ iface: SNDRV_CTL_ELEM_IFACE_MIXER, name: (xname), info: snd_ac97_info_double, \
  get: snd_ac97_get_double, put: snd_ac97_put_double, \
  private_value: reg | (shift_left << 8) | (shift_right << 12) | (mask << 16) | (invert << 24) }

static int snd_ac97_info_double(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	int mask = (kcontrol->private_value >> 16) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_ac97_get_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ac97_t *ac97 = snd_kcontrol_chip(kcontrol);
	int reg = kcontrol->private_value & 0xff;
	int shift_left = (kcontrol->private_value >> 8) & 0x0f;
	int shift_right = (kcontrol->private_value >> 12) & 0x0f;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	
	spin_lock(&ac97->reg_lock);
	ucontrol->value.integer.value[0] = (ac97->regs[reg] >> shift_left) & mask;
	ucontrol->value.integer.value[1] = (ac97->regs[reg] >> shift_right) & mask;
	spin_unlock(&ac97->reg_lock);
	if (invert) {
		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
		ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
	}
	return 0;
}

static int snd_ac97_put_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ac97_t *ac97 = snd_kcontrol_chip(kcontrol);
	int reg = kcontrol->private_value & 0xff;
	int shift_left = (kcontrol->private_value >> 8) & 0x0f;
	int shift_right = (kcontrol->private_value >> 12) & 0x0f;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	unsigned short val1, val2;
	
	val1 = ucontrol->value.integer.value[0] & mask;
	val2 = ucontrol->value.integer.value[1] & mask;
	if (invert) {
		val1 = mask - val1;
		val2 = mask - val2;
	}
	return snd_ac97_update_bits(ac97, reg, 
				    (mask << shift_left) | (mask << shift_right),
				    (val1 << shift_left) | (val2 << shift_right));
}

static const snd_kcontrol_new_t snd_ac97_controls_master[2] = {
AC97_SINGLE("Master Playback Switch", AC97_MASTER, 15, 1, 1),
AC97_DOUBLE("Master Playback Volume", AC97_MASTER, 8, 0, 31, 1)
};

static const snd_kcontrol_new_t snd_ac97_controls_headphone[2] = {
AC97_SINGLE("Headphone Playback Switch", AC97_HEADPHONE, 15, 1, 1),
AC97_DOUBLE("Headphone Playback Volume", AC97_HEADPHONE, 8, 0, 31, 1)
};

static const snd_kcontrol_new_t snd_ac97_controls_master_mono[2] = {
AC97_SINGLE("Master Mono Playback Switch", AC97_MASTER_MONO, 15, 1, 1),
AC97_SINGLE("Master Mono Playback Volume", AC97_MASTER_MONO, 0, 31, 1)
};

static const snd_kcontrol_new_t snd_ac97_controls_tone[2] = {
AC97_SINGLE("Tone Control - Bass", AC97_MASTER_TONE, 8, 15, 1),
AC97_SINGLE("Tone Control - Treble", AC97_MASTER_TONE, 0, 15, 1)
};

static const snd_kcontrol_new_t snd_ac97_controls_pc_beep[2] = {
AC97_SINGLE("PC Speaker Playback Switch", AC97_PC_BEEP, 15, 1, 1),
AC97_SINGLE("PC Speaker Playback Volume", AC97_PC_BEEP, 1, 15, 1)
};

static const snd_kcontrol_new_t snd_ac97_controls_phone[2] = {
AC97_SINGLE("Phone Playback Switch", AC97_PHONE, 15, 1, 1),
AC97_SINGLE("Phone Playback Volume", AC97_PHONE, 0, 15, 1)
};

static const snd_kcontrol_new_t snd_ac97_controls_mic[3] = {
AC97_SINGLE("Mic Playback Switch", AC97_MIC, 15, 1, 1),
AC97_SINGLE("Mic Playback Volume", AC97_MIC, 0, 15, 1),
AC97_SINGLE("Mic Boost (+20dB)", AC97_MIC, 6, 1, 0)
};

static const snd_kcontrol_new_t snd_ac97_controls_line[2] = {
AC97_SINGLE("Line Playback Switch", AC97_LINE, 15, 1, 1),
AC97_DOUBLE("Line Playback Volume", AC97_LINE, 8, 0, 31, 1)
};

static const snd_kcontrol_new_t snd_ac97_controls_cd[2] = {
AC97_SINGLE("CD Playback Switch", AC97_CD, 15, 1, 1),
AC97_DOUBLE("CD Playback Volume", AC97_CD, 8, 0, 31, 1)
};

static const snd_kcontrol_new_t snd_ac97_controls_video[2] = {
AC97_SINGLE("Video Playback Switch", AC97_VIDEO, 15, 1, 1),
AC97_DOUBLE("Video Playback Volume", AC97_VIDEO, 8, 0, 31, 1)
};

static const snd_kcontrol_new_t snd_ac97_controls_aux[2] = {
AC97_SINGLE("Aux Playback Switch", AC97_AUX, 15, 1, 1),
AC97_DOUBLE("Aux Playback Volume", AC97_AUX, 8, 0, 31, 1)
};

static const snd_kcontrol_new_t snd_ac97_controls_pcm[2] = {
AC97_SINGLE("PCM Playback Switch", AC97_PCM, 15, 1, 1),
AC97_DOUBLE("PCM Playback Volume", AC97_PCM, 8, 0, 31, 1)
};

static const snd_kcontrol_new_t snd_ac97_controls_capture[3] = {
{
	iface: SNDRV_CTL_ELEM_IFACE_MIXER,
	name: "Capture Source",
	info: snd_ac97_info_mux,
	get: snd_ac97_get_mux,
	put: snd_ac97_put_mux,
},
AC97_SINGLE("Capture Switch", AC97_REC_GAIN, 15, 1, 1),
AC97_DOUBLE("Capture Volume", AC97_REC_GAIN, 8, 0, 15, 0)
};

static const snd_kcontrol_new_t snd_ac97_controls_mic_capture[2] = {
AC97_SINGLE("Mic Capture Switch", AC97_REC_GAIN_MIC, 15, 1, 1),
AC97_SINGLE("Mic Capture Volume", AC97_REC_GAIN_MIC, 0, 15, 0)
};

typedef enum {
	AC97_GENERAL_PCM_OUT = 0,
	AC97_GENERAL_STEREO_ENHANCEMENT,
	AC97_GENERAL_3D,
	AC97_GENERAL_LOUDNESS,
	AC97_GENERAL_MONO,
	AC97_GENERAL_MIC,
	AC97_GENERAL_LOOPBACK
} ac97_general_index_t;

static const snd_kcontrol_new_t snd_ac97_controls_general[7] = {
AC97_ENUM_DOUBLE("PCM Out Path & Mute", AC97_GENERAL_PURPOSE, 15, 0),
AC97_SINGLE("Simulated Stereo Enhancement", AC97_GENERAL_PURPOSE, 14, 1, 0),
AC97_SINGLE("3D Control - Switch", AC97_GENERAL_PURPOSE, 13, 1, 0),
AC97_SINGLE("Loudness (bass boost)", AC97_GENERAL_PURPOSE, 12, 1, 0),
AC97_ENUM_DOUBLE("Mono Output Select", AC97_GENERAL_PURPOSE, 9, 0),
AC97_ENUM_DOUBLE("Mic Select", AC97_GENERAL_PURPOSE, 8, 0),
AC97_SINGLE("ADC/DAC Loopback", AC97_GENERAL_PURPOSE, 7, 1, 0)
};

static const snd_kcontrol_new_t snd_ac97_controls_3d[2] = {
AC97_SINGLE("3D Control - Center", AC97_3D_CONTROL, 8, 15, 0),
AC97_SINGLE("3D Control - Depth", AC97_3D_CONTROL, 0, 15, 0)
};

static const snd_kcontrol_new_t snd_ac97_controls_center[2] = {
AC97_SINGLE("Center Playback Switch", AC97_CENTER_LFE_MASTER, 7, 1, 1),
AC97_SINGLE("Center Playback Volume", AC97_CENTER_LFE_MASTER, 0, 31, 1)
};

static const snd_kcontrol_new_t snd_ac97_controls_lfe[2] = {
AC97_SINGLE("LFE Playback Switch", AC97_CENTER_LFE_MASTER, 15, 1, 1),
AC97_SINGLE("LFE Playback Volume", AC97_CENTER_LFE_MASTER, 8, 31, 1)
};

static const snd_kcontrol_new_t snd_ac97_controls_surround[2] = {
AC97_DOUBLE("Surround Playback Switch", AC97_SURROUND_MASTER, 15, 7, 1, 1),
AC97_DOUBLE("Surround Playback Volume", AC97_SURROUND_MASTER, 8, 0, 31, 1),
};

static const snd_kcontrol_new_t snd_ac97_sigmatel_controls[] = {
AC97_SINGLE("Sigmatel DAC 6dB Attenuate", AC97_SIGMATEL_ANALOG, 1, 1, 0),
AC97_SINGLE("Sigmatel ADC 6dB Attenuate", AC97_SIGMATEL_ANALOG, 0, 1, 0)
};

static const snd_kcontrol_new_t snd_ac97_control_eapd =
AC97_SINGLE("External Amplifier Power Down", AC97_POWERDOWN, 15, 1, 0);

static int snd_ac97_spdif_mask_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
	uinfo->count = 1;
	return 0;
}
                        
static int snd_ac97_spdif_cmask_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ucontrol->value.iec958.status[0] = IEC958_AES0_PROFESSIONAL |
					   IEC958_AES0_NONAUDIO |
					   IEC958_AES0_CON_EMPHASIS_5015 |
					   IEC958_AES0_CON_NOT_COPYRIGHT;
	ucontrol->value.iec958.status[1] = IEC958_AES1_CON_CATEGORY |
					   IEC958_AES1_CON_ORIGINAL;
	ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS;
	return 0;
}
                        
static int snd_ac97_spdif_pmask_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	/* FIXME: AC'97 spec doesn't say which bits are used for what */
	ucontrol->value.iec958.status[0] = IEC958_AES0_PROFESSIONAL |
					   IEC958_AES0_NONAUDIO |
					   IEC958_AES0_PRO_FS |
					   IEC958_AES0_PRO_EMPHASIS_5015;
	return 0;
}

static int snd_ac97_spdif_default_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ac97_t *ac97 = snd_kcontrol_chip(kcontrol);

	spin_lock(&ac97->reg_lock);
	ucontrol->value.iec958.status[0] = ac97->spdif_status & 0xff;
	ucontrol->value.iec958.status[1] = (ac97->spdif_status >> 8) & 0xff;
	ucontrol->value.iec958.status[2] = (ac97->spdif_status >> 16) & 0xff;
	ucontrol->value.iec958.status[3] = (ac97->spdif_status >> 24) & 0xff;
	spin_unlock(&ac97->reg_lock);
	return 0;
}
                        
static int snd_ac97_spdif_default_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ac97_t *ac97 = snd_kcontrol_chip(kcontrol);
	unsigned int new = 0;
	unsigned short val = 0;
	int change = 0;

	spin_lock(&ac97->reg_lock);
	new = val = ucontrol->value.iec958.status[0] & (IEC958_AES0_PROFESSIONAL|IEC958_AES0_NONAUDIO);
	if (ucontrol->value.iec958.status[0] & IEC958_AES0_PROFESSIONAL) {
		new |= ucontrol->value.iec958.status[0] & (IEC958_AES0_PRO_FS|IEC958_AES0_PRO_EMPHASIS_5015);
		switch (new & IEC958_AES0_PRO_FS) {
		case IEC958_AES0_PRO_FS_44100: val |= 0<<12; break;
		case IEC958_AES0_PRO_FS_32000: val |= 2<<12; break;
		case IEC958_AES0_PRO_FS_48000: val |= 1<<12; break;
		default:		       val |= 1<<12; break;
		}
		if ((new & IEC958_AES0_PRO_EMPHASIS) == IEC958_AES0_PRO_EMPHASIS_5015)
			val |= 1<<3;
	} else {
		new |= ucontrol->value.iec958.status[0] & (IEC958_AES0_CON_EMPHASIS_5015|IEC958_AES0_CON_NOT_COPYRIGHT);
		new |= ((ucontrol->value.iec958.status[1] & (IEC958_AES1_CON_CATEGORY|IEC958_AES1_CON_ORIGINAL)) << 8);
		new |= ((ucontrol->value.iec958.status[3] & IEC958_AES3_CON_FS) << 8);
		if ((new & IEC958_AES0_CON_EMPHASIS) == IEC958_AES0_CON_EMPHASIS_5015)
			val |= 1<<3;
		if (!(new & IEC958_AES0_CON_NOT_COPYRIGHT))
			val |= 1<<2;
		val |= ((new >> 8) & 0xff) << 4;	// category + original
		switch ((new >> 24) & 0xff) {
		case IEC958_AES3_CON_FS_44100: val |= 0<<12; break;
		case IEC958_AES3_CON_FS_48000: val |= 2<<12; break;
		case IEC958_AES3_CON_FS_32000: val |= 3<<12; break;
		default:		       val |= 1<<12; break;
		}
	}
	change = snd_ac97_update_bits(ac97, AC97_SPDIF, 0x3fff, val);
	change |= ac97->spdif_status != new;
	ac97->spdif_status = new;
	spin_unlock(&ac97->reg_lock);
	return change;
}

static const snd_kcontrol_new_t snd_ac97_controls_spdif[5] = {
	{
		access: SNDRV_CTL_ELEM_ACCESS_READ,
		iface: SNDRV_CTL_ELEM_IFACE_MIXER,
		name: SNDRV_CTL_NAME_IEC958("",PLAYBACK,CON_MASK),
		info: snd_ac97_spdif_mask_info,
		get: snd_ac97_spdif_cmask_get,
	},
	{
		access: SNDRV_CTL_ELEM_ACCESS_READ,
		iface: SNDRV_CTL_ELEM_IFACE_MIXER,
		name: SNDRV_CTL_NAME_IEC958("",PLAYBACK,PRO_MASK),
		info: snd_ac97_spdif_mask_info,
		get: snd_ac97_spdif_pmask_get,
	},
	{
		iface: SNDRV_CTL_ELEM_IFACE_MIXER,
		name: SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
		info: snd_ac97_spdif_mask_info,
		get: snd_ac97_spdif_default_get,
		put: snd_ac97_spdif_default_put,
	},
	AC97_SINGLE(SNDRV_CTL_NAME_IEC958("",PLAYBACK,SWITCH),AC97_EXTENDED_STATUS, 2, 1, 0),