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linux/sound/i2c/other/ak4xxx-adda.c
Jia-Ju Bai 2127c01b7f ALSA: i2c: ak4xxx-adda: Fix a possible null pointer dereference in build_adc_controls() 
In build_adc_controls(), there is an if statement on line 773 to check
whether ak->adc_info is NULL:
    if (! ak->adc_info ||
        ! ak->adc_info[mixer_ch].switch_name)

When ak->adc_info is NULL, it is used on line 792:
    knew.name = ak->adc_info[mixer_ch].selector_name;

Thus, a possible null-pointer dereference may occur.

To fix this bug, referring to lines 773 and 774, ak->adc_info
and ak->adc_info[mixer_ch].selector_name are checked before being used.

This bug is found by a static analysis tool STCheck written by us.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2019-07-26 14:25:37 +02:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ALSA driver for AK4524 / AK4528 / AK4529 / AK4355 / AK4358 / AK4381
* AD and DA converters
*
* Copyright (c) 2000-2004 Jaroslav Kysela <perex@perex.cz>,
* Takashi Iwai <tiwai@suse.de>
*/
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/tlv.h>
#include <sound/ak4xxx-adda.h>
#include <sound/info.h>
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>");
MODULE_DESCRIPTION("Routines for control of AK452x / AK43xx AD/DA converters");
MODULE_LICENSE("GPL");
/* write the given register and save the data to the cache */
void snd_akm4xxx_write(struct snd_akm4xxx *ak, int chip, unsigned char reg,
unsigned char val)
{
ak->ops.lock(ak, chip);
ak->ops.write(ak, chip, reg, val);
/* save the data */
snd_akm4xxx_set(ak, chip, reg, val);
ak->ops.unlock(ak, chip);
}
EXPORT_SYMBOL(snd_akm4xxx_write);
/* reset procedure for AK4524 and AK4528 */
static void ak4524_reset(struct snd_akm4xxx *ak, int state)
{
unsigned int chip;
unsigned char reg;
for (chip = 0; chip < ak->num_dacs/2; chip++) {
snd_akm4xxx_write(ak, chip, 0x01, state ? 0x00 : 0x03);
if (state)
continue;
/* DAC volumes */
for (reg = 0x04; reg < ak->total_regs; reg++)
snd_akm4xxx_write(ak, chip, reg,
snd_akm4xxx_get(ak, chip, reg));
}
}
/* reset procedure for AK4355 and AK4358 */
static void ak435X_reset(struct snd_akm4xxx *ak, int state)
{
unsigned char reg;
if (state) {
snd_akm4xxx_write(ak, 0, 0x01, 0x02); /* reset and soft-mute */
return;
}
for (reg = 0x00; reg < ak->total_regs; reg++)
if (reg != 0x01)
snd_akm4xxx_write(ak, 0, reg,
snd_akm4xxx_get(ak, 0, reg));
snd_akm4xxx_write(ak, 0, 0x01, 0x01); /* un-reset, unmute */
}
/* reset procedure for AK4381 */
static void ak4381_reset(struct snd_akm4xxx *ak, int state)
{
unsigned int chip;
unsigned char reg;
for (chip = 0; chip < ak->num_dacs/2; chip++) {
snd_akm4xxx_write(ak, chip, 0x00, state ? 0x0c : 0x0f);
if (state)
continue;
for (reg = 0x01; reg < ak->total_regs; reg++)
snd_akm4xxx_write(ak, chip, reg,
snd_akm4xxx_get(ak, chip, reg));
}
}
/*
* reset the AKM codecs
* @state: 1 = reset codec, 0 = restore the registers
*
* assert the reset operation and restores the register values to the chips.
*/
void snd_akm4xxx_reset(struct snd_akm4xxx *ak, int state)
{
switch (ak->type) {
case SND_AK4524:
case SND_AK4528:
case SND_AK4620:
ak4524_reset(ak, state);
break;
case SND_AK4529:
/* FIXME: needed for ak4529? */
break;
case SND_AK4355:
ak435X_reset(ak, state);
break;
case SND_AK4358:
ak435X_reset(ak, state);
break;
case SND_AK4381:
ak4381_reset(ak, state);
break;
default:
break;
}
}
EXPORT_SYMBOL(snd_akm4xxx_reset);
/*
* Volume conversion table for non-linear volumes
* from -63.5dB (mute) to 0dB step 0.5dB
*
* Used for AK4524/AK4620 input/ouput attenuation, AK4528, and
* AK5365 input attenuation
*/
static const unsigned char vol_cvt_datt[128] = {
0x00, 0x01, 0x01, 0x02, 0x02, 0x03, 0x03, 0x04,
0x04, 0x04, 0x04, 0x05, 0x05, 0x05, 0x06, 0x06,
0x06, 0x07, 0x07, 0x08, 0x08, 0x08, 0x09, 0x0a,
0x0a, 0x0b, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x0f,
0x10, 0x10, 0x11, 0x12, 0x12, 0x13, 0x13, 0x14,
0x15, 0x16, 0x17, 0x17, 0x18, 0x19, 0x1a, 0x1c,
0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x23,
0x24, 0x25, 0x26, 0x28, 0x29, 0x2a, 0x2b, 0x2d,
0x2e, 0x30, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
0x37, 0x38, 0x39, 0x3b, 0x3c, 0x3e, 0x3f, 0x40,
0x41, 0x42, 0x43, 0x44, 0x46, 0x47, 0x48, 0x4a,
0x4b, 0x4d, 0x4e, 0x50, 0x51, 0x52, 0x53, 0x54,
0x55, 0x56, 0x58, 0x59, 0x5b, 0x5c, 0x5e, 0x5f,
0x60, 0x61, 0x62, 0x64, 0x65, 0x66, 0x67, 0x69,
0x6a, 0x6c, 0x6d, 0x6f, 0x70, 0x71, 0x72, 0x73,
0x75, 0x76, 0x77, 0x79, 0x7a, 0x7c, 0x7d, 0x7f,
};
/*
* dB tables
*/
static const DECLARE_TLV_DB_SCALE(db_scale_vol_datt, -6350, 50, 1);
static const DECLARE_TLV_DB_SCALE(db_scale_8bit, -12750, 50, 1);
static const DECLARE_TLV_DB_SCALE(db_scale_7bit, -6350, 50, 1);
static const DECLARE_TLV_DB_LINEAR(db_scale_linear, TLV_DB_GAIN_MUTE, 0);
/*
* initialize all the ak4xxx chips
*/
void snd_akm4xxx_init(struct snd_akm4xxx *ak)
{
static const unsigned char inits_ak4524[] = {
0x00, 0x07, /* 0: all power up */
0x01, 0x00, /* 1: ADC/DAC reset */
0x02, 0x60, /* 2: 24bit I2S */
0x03, 0x19, /* 3: deemphasis off */
0x01, 0x03, /* 1: ADC/DAC enable */
0x04, 0x00, /* 4: ADC left muted */
0x05, 0x00, /* 5: ADC right muted */
0x06, 0x00, /* 6: DAC left muted */
0x07, 0x00, /* 7: DAC right muted */
0xff, 0xff
};
static const unsigned char inits_ak4528[] = {
0x00, 0x07, /* 0: all power up */
0x01, 0x00, /* 1: ADC/DAC reset */
0x02, 0x60, /* 2: 24bit I2S */
0x03, 0x0d, /* 3: deemphasis off, turn LR highpass filters on */
0x01, 0x03, /* 1: ADC/DAC enable */
0x04, 0x00, /* 4: ADC left muted */
0x05, 0x00, /* 5: ADC right muted */
0xff, 0xff
};
static const unsigned char inits_ak4529[] = {
0x09, 0x01, /* 9: ATS=0, RSTN=1 */
0x0a, 0x3f, /* A: all power up, no zero/overflow detection */
0x00, 0x0c, /* 0: TDM=0, 24bit I2S, SMUTE=0 */
0x01, 0x00, /* 1: ACKS=0, ADC, loop off */
0x02, 0xff, /* 2: LOUT1 muted */
0x03, 0xff, /* 3: ROUT1 muted */
0x04, 0xff, /* 4: LOUT2 muted */
0x05, 0xff, /* 5: ROUT2 muted */
0x06, 0xff, /* 6: LOUT3 muted */
0x07, 0xff, /* 7: ROUT3 muted */
0x0b, 0xff, /* B: LOUT4 muted */
0x0c, 0xff, /* C: ROUT4 muted */
0x08, 0x55, /* 8: deemphasis all off */
0xff, 0xff
};
static const unsigned char inits_ak4355[] = {
0x01, 0x02, /* 1: reset and soft-mute */
0x00, 0x06, /* 0: mode3(i2s), disable auto-clock detect,
* disable DZF, sharp roll-off, RSTN#=0 */
0x02, 0x0e, /* 2: DA's power up, normal speed, RSTN#=0 */
// 0x02, 0x2e, /* quad speed */
0x03, 0x01, /* 3: de-emphasis off */
0x04, 0x00, /* 4: LOUT1 volume muted */
0x05, 0x00, /* 5: ROUT1 volume muted */
0x06, 0x00, /* 6: LOUT2 volume muted */
0x07, 0x00, /* 7: ROUT2 volume muted */
0x08, 0x00, /* 8: LOUT3 volume muted */
0x09, 0x00, /* 9: ROUT3 volume muted */
0x0a, 0x00, /* a: DATT speed=0, ignore DZF */
0x01, 0x01, /* 1: un-reset, unmute */
0xff, 0xff
};
static const unsigned char inits_ak4358[] = {
0x01, 0x02, /* 1: reset and soft-mute */
0x00, 0x06, /* 0: mode3(i2s), disable auto-clock detect,
* disable DZF, sharp roll-off, RSTN#=0 */
0x02, 0x4e, /* 2: DA's power up, normal speed, RSTN#=0 */
/* 0x02, 0x6e,*/ /* quad speed */
0x03, 0x01, /* 3: de-emphasis off */
0x04, 0x00, /* 4: LOUT1 volume muted */
0x05, 0x00, /* 5: ROUT1 volume muted */
0x06, 0x00, /* 6: LOUT2 volume muted */
0x07, 0x00, /* 7: ROUT2 volume muted */
0x08, 0x00, /* 8: LOUT3 volume muted */
0x09, 0x00, /* 9: ROUT3 volume muted */
0x0b, 0x00, /* b: LOUT4 volume muted */
0x0c, 0x00, /* c: ROUT4 volume muted */
0x0a, 0x00, /* a: DATT speed=0, ignore DZF */
0x01, 0x01, /* 1: un-reset, unmute */
0xff, 0xff
};
static const unsigned char inits_ak4381[] = {
0x00, 0x0c, /* 0: mode3(i2s), disable auto-clock detect */
0x01, 0x02, /* 1: de-emphasis off, normal speed,
* sharp roll-off, DZF off */
// 0x01, 0x12, /* quad speed */
0x02, 0x00, /* 2: DZF disabled */
0x03, 0x00, /* 3: LATT 0 */
0x04, 0x00, /* 4: RATT 0 */
0x00, 0x0f, /* 0: power-up, un-reset */
0xff, 0xff
};
static const unsigned char inits_ak4620[] = {
0x00, 0x07, /* 0: normal */
0x01, 0x00, /* 0: reset */
0x01, 0x02, /* 1: RSTAD */
0x01, 0x03, /* 1: RSTDA */
0x01, 0x0f, /* 1: normal */
0x02, 0x60, /* 2: 24bit I2S */
0x03, 0x01, /* 3: deemphasis off */
0x04, 0x00, /* 4: LIN muted */
0x05, 0x00, /* 5: RIN muted */
0x06, 0x00, /* 6: LOUT muted */
0x07, 0x00, /* 7: ROUT muted */
0xff, 0xff
};
int chip;
const unsigned char *ptr, *inits;
unsigned char reg, data;
memset(ak->images, 0, sizeof(ak->images));
memset(ak->volumes, 0, sizeof(ak->volumes));
switch (ak->type) {
case SND_AK4524:
inits = inits_ak4524;
ak->num_chips = ak->num_dacs / 2;
ak->name = "ak4524";
ak->total_regs = 0x08;
break;
case SND_AK4528:
inits = inits_ak4528;
ak->num_chips = ak->num_dacs / 2;
ak->name = "ak4528";
ak->total_regs = 0x06;
break;
case SND_AK4529:
inits = inits_ak4529;
ak->num_chips = 1;
ak->name = "ak4529";
ak->total_regs = 0x0d;
break;
case SND_AK4355:
inits = inits_ak4355;
ak->num_chips = 1;
ak->name = "ak4355";
ak->total_regs = 0x0b;
break;
case SND_AK4358:
inits = inits_ak4358;
ak->num_chips = 1;
ak->name = "ak4358";
ak->total_regs = 0x10;
break;
case SND_AK4381:
inits = inits_ak4381;
ak->num_chips = ak->num_dacs / 2;
ak->name = "ak4381";
ak->total_regs = 0x05;
break;
case SND_AK5365:
/* FIXME: any init sequence? */
ak->num_chips = 1;
ak->name = "ak5365";
ak->total_regs = 0x08;
return;
case SND_AK4620:
inits = inits_ak4620;
ak->num_chips = ak->num_dacs / 2;
ak->name = "ak4620";
ak->total_regs = 0x08;
break;
default:
snd_BUG();
return;
}
for (chip = 0; chip < ak->num_chips; chip++) {
ptr = inits;
while (*ptr != 0xff) {
reg = *ptr++;
data = *ptr++;
snd_akm4xxx_write(ak, chip, reg, data);
udelay(10);
}
}
}
EXPORT_SYMBOL(snd_akm4xxx_init);
/*
* Mixer callbacks
*/
#define AK_IPGA (1<<20) /* including IPGA */
#define AK_VOL_CVT (1<<21) /* need dB conversion */
#define AK_NEEDSMSB (1<<22) /* need MSB update bit */
#define AK_INVERT (1<<23) /* data is inverted */
#define AK_GET_CHIP(val) (((val) >> 8) & 0xff)
#define AK_GET_ADDR(val) ((val) & 0xff)
#define AK_GET_SHIFT(val) (((val) >> 16) & 0x0f)
#define AK_GET_VOL_CVT(val) (((val) >> 21) & 1)
#define AK_GET_IPGA(val) (((val) >> 20) & 1)
#define AK_GET_NEEDSMSB(val) (((val) >> 22) & 1)
#define AK_GET_INVERT(val) (((val) >> 23) & 1)
#define AK_GET_MASK(val) (((val) >> 24) & 0xff)
#define AK_COMPOSE(chip,addr,shift,mask) \
(((chip) << 8) | (addr) | ((shift) << 16) | ((mask) << 24))
static int snd_akm4xxx_volume_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
unsigned int mask = AK_GET_MASK(kcontrol->private_value);
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = mask;
return 0;
}
static int snd_akm4xxx_volume_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int chip = AK_GET_CHIP(kcontrol->private_value);
int addr = AK_GET_ADDR(kcontrol->private_value);
ucontrol->value.integer.value[0] = snd_akm4xxx_get_vol(ak, chip, addr);
return 0;
}
static int put_ak_reg(struct snd_kcontrol *kcontrol, int addr,
unsigned char nval)
{
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
unsigned int mask = AK_GET_MASK(kcontrol->private_value);
int chip = AK_GET_CHIP(kcontrol->private_value);
if (snd_akm4xxx_get_vol(ak, chip, addr) == nval)
return 0;
snd_akm4xxx_set_vol(ak, chip, addr, nval);
if (AK_GET_VOL_CVT(kcontrol->private_value) && nval < 128)
nval = vol_cvt_datt[nval];
if (AK_GET_IPGA(kcontrol->private_value) && nval >= 128)
nval++; /* need to correct + 1 since both 127 and 128 are 0dB */
if (AK_GET_INVERT(kcontrol->private_value))
nval = mask - nval;
if (AK_GET_NEEDSMSB(kcontrol->private_value))
nval |= 0x80;
/* printk(KERN_DEBUG "DEBUG - AK writing reg: chip %x addr %x,
nval %x\n", chip, addr, nval); */
snd_akm4xxx_write(ak, chip, addr, nval);
return 1;
}
static int snd_akm4xxx_volume_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
unsigned int mask = AK_GET_MASK(kcontrol->private_value);
unsigned int val = ucontrol->value.integer.value[0];
if (val > mask)
return -EINVAL;
return put_ak_reg(kcontrol, AK_GET_ADDR(kcontrol->private_value), val);
}
static int snd_akm4xxx_stereo_volume_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
unsigned int mask = AK_GET_MASK(kcontrol->private_value);
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = mask;
return 0;
}
static int snd_akm4xxx_stereo_volume_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int chip = AK_GET_CHIP(kcontrol->private_value);
int addr = AK_GET_ADDR(kcontrol->private_value);
ucontrol->value.integer.value[0] = snd_akm4xxx_get_vol(ak, chip, addr);
ucontrol->value.integer.value[1] = snd_akm4xxx_get_vol(ak, chip, addr+1);
return 0;
}
static int snd_akm4xxx_stereo_volume_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int addr = AK_GET_ADDR(kcontrol->private_value);
unsigned int mask = AK_GET_MASK(kcontrol->private_value);
unsigned int val[2];
int change;
val[0] = ucontrol->value.integer.value[0];
val[1] = ucontrol->value.integer.value[1];
if (val[0] > mask || val[1] > mask)
return -EINVAL;
change = put_ak_reg(kcontrol, addr, val[0]);
change |= put_ak_reg(kcontrol, addr + 1, val[1]);
return change;
}
static int snd_akm4xxx_deemphasis_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
static const char * const texts[4] = {
"44.1kHz", "Off", "48kHz", "32kHz",
};
return snd_ctl_enum_info(uinfo, 1, 4, texts);
}
static int snd_akm4xxx_deemphasis_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int chip = AK_GET_CHIP(kcontrol->private_value);
int addr = AK_GET_ADDR(kcontrol->private_value);
int shift = AK_GET_SHIFT(kcontrol->private_value);
ucontrol->value.enumerated.item[0] =
(snd_akm4xxx_get(ak, chip, addr) >> shift) & 3;
return 0;
}
static int snd_akm4xxx_deemphasis_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int chip = AK_GET_CHIP(kcontrol->private_value);
int addr = AK_GET_ADDR(kcontrol->private_value);
int shift = AK_GET_SHIFT(kcontrol->private_value);
unsigned char nval = ucontrol->value.enumerated.item[0] & 3;
int change;
nval = (nval << shift) |
(snd_akm4xxx_get(ak, chip, addr) & ~(3 << shift));
change = snd_akm4xxx_get(ak, chip, addr) != nval;
if (change)
snd_akm4xxx_write(ak, chip, addr, nval);
return change;
}
#define ak4xxx_switch_info snd_ctl_boolean_mono_info
static int ak4xxx_switch_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int chip = AK_GET_CHIP(kcontrol->private_value);
int addr = AK_GET_ADDR(kcontrol->private_value);
int shift = AK_GET_SHIFT(kcontrol->private_value);
int invert = AK_GET_INVERT(kcontrol->private_value);
/* we observe the (1<<shift) bit only */
unsigned char val = snd_akm4xxx_get(ak, chip, addr) & (1<<shift);
if (invert)
val = ! val;
ucontrol->value.integer.value[0] = (val & (1<<shift)) != 0;
return 0;
}
static int ak4xxx_switch_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int chip = AK_GET_CHIP(kcontrol->private_value);
int addr = AK_GET_ADDR(kcontrol->private_value);
int shift = AK_GET_SHIFT(kcontrol->private_value);
int invert = AK_GET_INVERT(kcontrol->private_value);
long flag = ucontrol->value.integer.value[0];
unsigned char val, oval;
int change;
if (invert)
flag = ! flag;
oval = snd_akm4xxx_get(ak, chip, addr);
if (flag)
val = oval | (1<<shift);
else
val = oval & ~(1<<shift);
change = (oval != val);
if (change)
snd_akm4xxx_write(ak, chip, addr, val);
return change;
}
#define AK5365_NUM_INPUTS 5
static int ak4xxx_capture_num_inputs(struct snd_akm4xxx *ak, int mixer_ch)
{
int num_names;
const char **input_names;
input_names = ak->adc_info[mixer_ch].input_names;
num_names = 0;
while (num_names < AK5365_NUM_INPUTS && input_names[num_names])
++num_names;
return num_names;
}
static int ak4xxx_capture_source_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int mixer_ch = AK_GET_SHIFT(kcontrol->private_value);
unsigned int num_names;
num_names = ak4xxx_capture_num_inputs(ak, mixer_ch);
if (!num_names)
return -EINVAL;
return snd_ctl_enum_info(uinfo, 1, num_names,
ak->adc_info[mixer_ch].input_names);
}
static int ak4xxx_capture_source_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int chip = AK_GET_CHIP(kcontrol->private_value);
int addr = AK_GET_ADDR(kcontrol->private_value);
int mask = AK_GET_MASK(kcontrol->private_value);
unsigned char val;
val = snd_akm4xxx_get(ak, chip, addr) & mask;
ucontrol->value.enumerated.item[0] = val;
return 0;
}
static int ak4xxx_capture_source_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int mixer_ch = AK_GET_SHIFT(kcontrol->private_value);
int chip = AK_GET_CHIP(kcontrol->private_value);
int addr = AK_GET_ADDR(kcontrol->private_value);
int mask = AK_GET_MASK(kcontrol->private_value);
unsigned char oval, val;
int num_names = ak4xxx_capture_num_inputs(ak, mixer_ch);
if (ucontrol->value.enumerated.item[0] >= num_names)
return -EINVAL;
oval = snd_akm4xxx_get(ak, chip, addr);
val = oval & ~mask;
val |= ucontrol->value.enumerated.item[0] & mask;
if (val != oval) {
snd_akm4xxx_write(ak, chip, addr, val);
return 1;
}
return 0;
}
/*
* build AK4xxx controls
*/
static int build_dac_controls(struct snd_akm4xxx *ak)
{
int idx, err, mixer_ch, num_stereo;
struct snd_kcontrol_new knew;
mixer_ch = 0;
for (idx = 0; idx < ak->num_dacs; ) {
/* mute control for Revolution 7.1 - AK4381 */
if (ak->type == SND_AK4381
&& ak->dac_info[mixer_ch].switch_name) {
memset(&knew, 0, sizeof(knew));
knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
knew.count = 1;
knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
knew.name = ak->dac_info[mixer_ch].switch_name;
knew.info = ak4xxx_switch_info;
knew.get = ak4xxx_switch_get;
knew.put = ak4xxx_switch_put;
knew.access = 0;
/* register 1, bit 0 (SMUTE): 0 = normal operation,
1 = mute */
knew.private_value =
AK_COMPOSE(idx/2, 1, 0, 0) | AK_INVERT;
err = snd_ctl_add(ak->card, snd_ctl_new1(&knew, ak));
if (err < 0)
return err;
}
memset(&knew, 0, sizeof(knew));
if (! ak->dac_info || ! ak->dac_info[mixer_ch].name) {
knew.name = "DAC Volume";
knew.index = mixer_ch + ak->idx_offset * 2;
num_stereo = 1;
} else {
knew.name = ak->dac_info[mixer_ch].name;
num_stereo = ak->dac_info[mixer_ch].num_channels;
}
knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
knew.count = 1;
knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
SNDRV_CTL_ELEM_ACCESS_TLV_READ;
if (num_stereo == 2) {
knew.info = snd_akm4xxx_stereo_volume_info;
knew.get = snd_akm4xxx_stereo_volume_get;
knew.put = snd_akm4xxx_stereo_volume_put;
} else {
knew.info = snd_akm4xxx_volume_info;
knew.get = snd_akm4xxx_volume_get;
knew.put = snd_akm4xxx_volume_put;
}
switch (ak->type) {
case SND_AK4524:
/* register 6 & 7 */
knew.private_value =
AK_COMPOSE(idx/2, (idx%2) + 6, 0, 127) |
AK_VOL_CVT;
knew.tlv.p = db_scale_vol_datt;
break;
case SND_AK4528:
/* register 4 & 5 */
knew.private_value =
AK_COMPOSE(idx/2, (idx%2) + 4, 0, 127) |
AK_VOL_CVT;
knew.tlv.p = db_scale_vol_datt;
break;
case SND_AK4529: {
/* registers 2-7 and b,c */
int val = idx < 6 ? idx + 2 : (idx - 6) + 0xb;
knew.private_value =
AK_COMPOSE(0, val, 0, 255) | AK_INVERT;
knew.tlv.p = db_scale_8bit;
break;
}
case SND_AK4355:
/* register 4-9, chip #0 only */
knew.private_value = AK_COMPOSE(0, idx + 4, 0, 255);
knew.tlv.p = db_scale_8bit;
break;
case SND_AK4358: {
/* register 4-9 and 11-12, chip #0 only */
int addr = idx < 6 ? idx + 4 : idx + 5;
knew.private_value =
AK_COMPOSE(0, addr, 0, 127) | AK_NEEDSMSB;
knew.tlv.p = db_scale_7bit;
break;
}
case SND_AK4381:
/* register 3 & 4 */
knew.private_value =
AK_COMPOSE(idx/2, (idx%2) + 3, 0, 255);
knew.tlv.p = db_scale_linear;
break;
case SND_AK4620:
/* register 6 & 7 */
knew.private_value =
AK_COMPOSE(idx/2, (idx%2) + 6, 0, 255);
knew.tlv.p = db_scale_linear;
break;
default:
return -EINVAL;
}
err = snd_ctl_add(ak->card, snd_ctl_new1(&knew, ak));
if (err < 0)
return err;
idx += num_stereo;
mixer_ch++;
}
return 0;
}
static int build_adc_controls(struct snd_akm4xxx *ak)
{
int idx, err, mixer_ch, num_stereo, max_steps;
struct snd_kcontrol_new knew;
mixer_ch = 0;
if (ak->type == SND_AK4528)
return 0; /* no controls */
for (idx = 0; idx < ak->num_adcs;) {
memset(&knew, 0, sizeof(knew));
if (! ak->adc_info || ! ak->adc_info[mixer_ch].name) {
knew.name = "ADC Volume";
knew.index = mixer_ch + ak->idx_offset * 2;
num_stereo = 1;
} else {
knew.name = ak->adc_info[mixer_ch].name;
num_stereo = ak->adc_info[mixer_ch].num_channels;
}
knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
knew.count = 1;
knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
SNDRV_CTL_ELEM_ACCESS_TLV_READ;
if (num_stereo == 2) {
knew.info = snd_akm4xxx_stereo_volume_info;
knew.get = snd_akm4xxx_stereo_volume_get;
knew.put = snd_akm4xxx_stereo_volume_put;
} else {
knew.info = snd_akm4xxx_volume_info;
knew.get = snd_akm4xxx_volume_get;
knew.put = snd_akm4xxx_volume_put;
}
/* register 4 & 5 */
if (ak->type == SND_AK5365)
max_steps = 152;
else
max_steps = 164;
knew.private_value =
AK_COMPOSE(idx/2, (idx%2) + 4, 0, max_steps) |
AK_VOL_CVT | AK_IPGA;
knew.tlv.p = db_scale_vol_datt;
err = snd_ctl_add(ak->card, snd_ctl_new1(&knew, ak));
if (err < 0)
return err;
if (ak->type == SND_AK5365 && (idx % 2) == 0) {
if (! ak->adc_info ||
! ak->adc_info[mixer_ch].switch_name) {
knew.name = "Capture Switch";
knew.index = mixer_ch + ak->idx_offset * 2;
} else
knew.name = ak->adc_info[mixer_ch].switch_name;
knew.info = ak4xxx_switch_info;
knew.get = ak4xxx_switch_get;
knew.put = ak4xxx_switch_put;
knew.access = 0;
/* register 2, bit 0 (SMUTE): 0 = normal operation,
1 = mute */
knew.private_value =
AK_COMPOSE(idx/2, 2, 0, 0) | AK_INVERT;
err = snd_ctl_add(ak->card, snd_ctl_new1(&knew, ak));
if (err < 0)
return err;
memset(&knew, 0, sizeof(knew));
if (!ak->adc_info ||
!ak->adc_info[mixer_ch].selector_name) {
knew.name = "Capture Channel";
knew.index = mixer_ch + ak->idx_offset * 2;
} else
knew.name = ak->adc_info[mixer_ch].selector_name;
knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
knew.info = ak4xxx_capture_source_info;
knew.get = ak4xxx_capture_source_get;
knew.put = ak4xxx_capture_source_put;
knew.access = 0;
/* input selector control: reg. 1, bits 0-2.
* mis-use 'shift' to pass mixer_ch */
knew.private_value
= AK_COMPOSE(idx/2, 1, mixer_ch, 0x07);
err = snd_ctl_add(ak->card, snd_ctl_new1(&knew, ak));
if (err < 0)
return err;
}
idx += num_stereo;
mixer_ch++;
}
return 0;
}
static int build_deemphasis(struct snd_akm4xxx *ak, int num_emphs)
{
int idx, err;
struct snd_kcontrol_new knew;
for (idx = 0; idx < num_emphs; idx++) {
memset(&knew, 0, sizeof(knew));
knew.name = "Deemphasis";
knew.index = idx + ak->idx_offset;
knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
knew.count = 1;
knew.info = snd_akm4xxx_deemphasis_info;
knew.get = snd_akm4xxx_deemphasis_get;
knew.put = snd_akm4xxx_deemphasis_put;
switch (ak->type) {
case SND_AK4524:
case SND_AK4528:
case SND_AK4620:
/* register 3 */
knew.private_value = AK_COMPOSE(idx, 3, 0, 0);
break;
case SND_AK4529: {
int shift = idx == 3 ? 6 : (2 - idx) * 2;
/* register 8 with shift */
knew.private_value = AK_COMPOSE(0, 8, shift, 0);
break;
}
case SND_AK4355:
case SND_AK4358:
knew.private_value = AK_COMPOSE(idx, 3, 0, 0);
break;
case SND_AK4381:
knew.private_value = AK_COMPOSE(idx, 1, 1, 0);
break;
default:
return -EINVAL;
}
err = snd_ctl_add(ak->card, snd_ctl_new1(&knew, ak));
if (err < 0)
return err;
}
return 0;
}
static void proc_regs_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_akm4xxx *ak = entry->private_data;
int reg, val, chip;
for (chip = 0; chip < ak->num_chips; chip++) {
for (reg = 0; reg < ak->total_regs; reg++) {
val = snd_akm4xxx_get(ak, chip, reg);
snd_iprintf(buffer, "chip %d: 0x%02x = 0x%02x\n", chip,
reg, val);
}
}
}
static int proc_init(struct snd_akm4xxx *ak)
{
return snd_card_ro_proc_new(ak->card, ak->name, ak, proc_regs_read);
}
int snd_akm4xxx_build_controls(struct snd_akm4xxx *ak)
{
int err, num_emphs;
err = build_dac_controls(ak);
if (err < 0)
return err;
err = build_adc_controls(ak);
if (err < 0)
return err;
if (ak->type == SND_AK4355 || ak->type == SND_AK4358)
num_emphs = 1;
else if (ak->type == SND_AK4620)
num_emphs = 0;
else
num_emphs = ak->num_dacs / 2;
err = build_deemphasis(ak, num_emphs);
if (err < 0)
return err;
err = proc_init(ak);
if (err < 0)
return err;
return 0;
}
EXPORT_SYMBOL(snd_akm4xxx_build_controls);
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