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linux/sound/pci/ak4531_codec.c
Takashi Iwai dadfb986ce ALSA: ak4531: Fix assignment in if condition 
AK4531 codec driver code contains a few assignments in if condition,
which is a bad coding style that may confuse readers and occasionally
lead to bugs.

This patch is merely for coding-style fixes, no functional changes.

Link: https://lore.kernel.org/r/20210608140540.17885-17-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-06-09 17:29:49 +02:00

474 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
* Universal routines for AK4531 codec
*/
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/ak4531_codec.h>
#include <sound/tlv.h>
/*
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Universal routines for AK4531 codec");
MODULE_LICENSE("GPL");
*/
static void snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531);
/*
*
*/
#if 0
static void snd_ak4531_dump(struct snd_ak4531 *ak4531)
{
int idx;
for (idx = 0; idx < 0x19; idx++)
printk(KERN_DEBUG "ak4531 0x%x: 0x%x\n",
idx, ak4531->regs[idx]);
}
#endif
/*
*
*/
#define AK4531_SINGLE(xname, xindex, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
.info = snd_ak4531_info_single, \
.get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
.private_value = reg | (shift << 16) | (mask << 24) | (invert << 22) }
#define AK4531_SINGLE_TLV(xname, xindex, reg, shift, mask, invert, xtlv) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
.name = xname, .index = xindex, \
.info = snd_ak4531_info_single, \
.get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
.private_value = reg | (shift << 16) | (mask << 24) | (invert << 22), \
.tlv = { .p = (xtlv) } }
static int snd_ak4531_info_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
int mask = (kcontrol->private_value >> 24) & 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_ak4531_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
int reg = kcontrol->private_value & 0xff;
int shift = (kcontrol->private_value >> 16) & 0x07;
int mask = (kcontrol->private_value >> 24) & 0xff;
int invert = (kcontrol->private_value >> 22) & 1;
int val;
mutex_lock(&ak4531->reg_mutex);
val = (ak4531->regs[reg] >> shift) & mask;
mutex_unlock(&ak4531->reg_mutex);
if (invert) {
val = mask - val;
}
ucontrol->value.integer.value[0] = val;
return 0;
}
static int snd_ak4531_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
int reg = kcontrol->private_value & 0xff;
int shift = (kcontrol->private_value >> 16) & 0x07;
int mask = (kcontrol->private_value >> 24) & 0xff;
int invert = (kcontrol->private_value >> 22) & 1;
int change;
int val;
val = ucontrol->value.integer.value[0] & mask;
if (invert) {
val = mask - val;
}
val <<= shift;
mutex_lock(&ak4531->reg_mutex);
val = (ak4531->regs[reg] & ~(mask << shift)) | val;
change = val != ak4531->regs[reg];
ak4531->write(ak4531, reg, ak4531->regs[reg] = val);
mutex_unlock(&ak4531->reg_mutex);
return change;
}
#define AK4531_DOUBLE(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
.info = snd_ak4531_info_double, \
.get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
.private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22) }
#define AK4531_DOUBLE_TLV(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert, xtlv) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
.name = xname, .index = xindex, \
.info = snd_ak4531_info_double, \
.get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
.private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22), \
.tlv = { .p = (xtlv) } }
static int snd_ak4531_info_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
int mask = (kcontrol->private_value >> 24) & 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_ak4531_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
int left_reg = kcontrol->private_value & 0xff;
int right_reg = (kcontrol->private_value >> 8) & 0xff;
int left_shift = (kcontrol->private_value >> 16) & 0x07;
int right_shift = (kcontrol->private_value >> 19) & 0x07;
int mask = (kcontrol->private_value >> 24) & 0xff;
int invert = (kcontrol->private_value >> 22) & 1;
int left, right;
mutex_lock(&ak4531->reg_mutex);
left = (ak4531->regs[left_reg] >> left_shift) & mask;
right = (ak4531->regs[right_reg] >> right_shift) & mask;
mutex_unlock(&ak4531->reg_mutex);
if (invert) {
left = mask - left;
right = mask - right;
}
ucontrol->value.integer.value[0] = left;
ucontrol->value.integer.value[1] = right;
return 0;
}
static int snd_ak4531_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
int left_reg = kcontrol->private_value & 0xff;
int right_reg = (kcontrol->private_value >> 8) & 0xff;
int left_shift = (kcontrol->private_value >> 16) & 0x07;
int right_shift = (kcontrol->private_value >> 19) & 0x07;
int mask = (kcontrol->private_value >> 24) & 0xff;
int invert = (kcontrol->private_value >> 22) & 1;
int change;
int left, right;
left = ucontrol->value.integer.value[0] & mask;
right = ucontrol->value.integer.value[1] & mask;
if (invert) {
left = mask - left;
right = mask - right;
}
left <<= left_shift;
right <<= right_shift;
mutex_lock(&ak4531->reg_mutex);
if (left_reg == right_reg) {
left = (ak4531->regs[left_reg] & ~((mask << left_shift) | (mask << right_shift))) | left | right;
change = left != ak4531->regs[left_reg];
ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
} else {
left = (ak4531->regs[left_reg] & ~(mask << left_shift)) | left;
right = (ak4531->regs[right_reg] & ~(mask << right_shift)) | right;
change = left != ak4531->regs[left_reg] || right != ak4531->regs[right_reg];
ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
ak4531->write(ak4531, right_reg, ak4531->regs[right_reg] = right);
}
mutex_unlock(&ak4531->reg_mutex);
return change;
}
#define AK4531_INPUT_SW(xname, xindex, reg1, reg2, left_shift, right_shift) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
.info = snd_ak4531_info_input_sw, \
.get = snd_ak4531_get_input_sw, .put = snd_ak4531_put_input_sw, \
.private_value = reg1 | (reg2 << 8) | (left_shift << 16) | (right_shift << 24) }
static int snd_ak4531_info_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
uinfo->count = 4;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 1;
return 0;
}
static int snd_ak4531_get_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
int reg1 = kcontrol->private_value & 0xff;
int reg2 = (kcontrol->private_value >> 8) & 0xff;
int left_shift = (kcontrol->private_value >> 16) & 0x0f;
int right_shift = (kcontrol->private_value >> 24) & 0x0f;
mutex_lock(&ak4531->reg_mutex);
ucontrol->value.integer.value[0] = (ak4531->regs[reg1] >> left_shift) & 1;
ucontrol->value.integer.value[1] = (ak4531->regs[reg2] >> left_shift) & 1;
ucontrol->value.integer.value[2] = (ak4531->regs[reg1] >> right_shift) & 1;
ucontrol->value.integer.value[3] = (ak4531->regs[reg2] >> right_shift) & 1;
mutex_unlock(&ak4531->reg_mutex);
return 0;
}
static int snd_ak4531_put_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
int reg1 = kcontrol->private_value & 0xff;
int reg2 = (kcontrol->private_value >> 8) & 0xff;
int left_shift = (kcontrol->private_value >> 16) & 0x0f;
int right_shift = (kcontrol->private_value >> 24) & 0x0f;
int change;
int val1, val2;
mutex_lock(&ak4531->reg_mutex);
val1 = ak4531->regs[reg1] & ~((1 << left_shift) | (1 << right_shift));
val2 = ak4531->regs[reg2] & ~((1 << left_shift) | (1 << right_shift));
val1 |= (ucontrol->value.integer.value[0] & 1) << left_shift;
val2 |= (ucontrol->value.integer.value[1] & 1) << left_shift;
val1 |= (ucontrol->value.integer.value[2] & 1) << right_shift;
val2 |= (ucontrol->value.integer.value[3] & 1) << right_shift;
change = val1 != ak4531->regs[reg1] || val2 != ak4531->regs[reg2];
ak4531->write(ak4531, reg1, ak4531->regs[reg1] = val1);
ak4531->write(ak4531, reg2, ak4531->regs[reg2] = val2);
mutex_unlock(&ak4531->reg_mutex);
return change;
}
static const DECLARE_TLV_DB_SCALE(db_scale_master, -6200, 200, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_mono, -2800, 400, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_input, -5000, 200, 0);
static const struct snd_kcontrol_new snd_ak4531_controls[] = {
AK4531_DOUBLE_TLV("Master Playback Switch", 0,
AK4531_LMASTER, AK4531_RMASTER, 7, 7, 1, 1,
db_scale_master),
AK4531_DOUBLE("Master Playback Volume", 0, AK4531_LMASTER, AK4531_RMASTER, 0, 0, 0x1f, 1),
AK4531_SINGLE_TLV("Master Mono Playback Switch", 0, AK4531_MONO_OUT, 7, 1, 1,
db_scale_mono),
AK4531_SINGLE("Master Mono Playback Volume", 0, AK4531_MONO_OUT, 0, 0x07, 1),
AK4531_DOUBLE("PCM Switch", 0, AK4531_LVOICE, AK4531_RVOICE, 7, 7, 1, 1),
AK4531_DOUBLE_TLV("PCM Volume", 0, AK4531_LVOICE, AK4531_RVOICE, 0, 0, 0x1f, 1,
db_scale_input),
AK4531_DOUBLE("PCM Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 3, 2, 1, 0),
AK4531_DOUBLE("PCM Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 2, 2, 1, 0),
AK4531_DOUBLE("PCM Switch", 1, AK4531_LFM, AK4531_RFM, 7, 7, 1, 1),
AK4531_DOUBLE_TLV("PCM Volume", 1, AK4531_LFM, AK4531_RFM, 0, 0, 0x1f, 1,
db_scale_input),
AK4531_DOUBLE("PCM Playback Switch", 1, AK4531_OUT_SW1, AK4531_OUT_SW1, 6, 5, 1, 0),
AK4531_INPUT_SW("PCM Capture Route", 1, AK4531_LIN_SW1, AK4531_RIN_SW1, 6, 5),
AK4531_DOUBLE("CD Switch", 0, AK4531_LCD, AK4531_RCD, 7, 7, 1, 1),
AK4531_DOUBLE_TLV("CD Volume", 0, AK4531_LCD, AK4531_RCD, 0, 0, 0x1f, 1,
db_scale_input),
AK4531_DOUBLE("CD Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 2, 1, 1, 0),
AK4531_INPUT_SW("CD Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 2, 1),
AK4531_DOUBLE("Line Switch", 0, AK4531_LLINE, AK4531_RLINE, 7, 7, 1, 1),
AK4531_DOUBLE_TLV("Line Volume", 0, AK4531_LLINE, AK4531_RLINE, 0, 0, 0x1f, 1,
db_scale_input),
AK4531_DOUBLE("Line Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 4, 3, 1, 0),
AK4531_INPUT_SW("Line Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 4, 3),
AK4531_DOUBLE("Aux Switch", 0, AK4531_LAUXA, AK4531_RAUXA, 7, 7, 1, 1),
AK4531_DOUBLE_TLV("Aux Volume", 0, AK4531_LAUXA, AK4531_RAUXA, 0, 0, 0x1f, 1,
db_scale_input),
AK4531_DOUBLE("Aux Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 5, 4, 1, 0),
AK4531_INPUT_SW("Aux Capture Route", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 4, 3),
AK4531_SINGLE("Mono Switch", 0, AK4531_MONO1, 7, 1, 1),
AK4531_SINGLE_TLV("Mono Volume", 0, AK4531_MONO1, 0, 0x1f, 1, db_scale_input),
AK4531_SINGLE("Mono Playback Switch", 0, AK4531_OUT_SW2, 0, 1, 0),
AK4531_DOUBLE("Mono Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 0, 0, 1, 0),
AK4531_SINGLE("Mono Switch", 1, AK4531_MONO2, 7, 1, 1),
AK4531_SINGLE_TLV("Mono Volume", 1, AK4531_MONO2, 0, 0x1f, 1, db_scale_input),
AK4531_SINGLE("Mono Playback Switch", 1, AK4531_OUT_SW2, 1, 1, 0),
AK4531_DOUBLE("Mono Capture Switch", 1, AK4531_LIN_SW2, AK4531_RIN_SW2, 1, 1, 1, 0),
AK4531_SINGLE_TLV("Mic Volume", 0, AK4531_MIC, 0, 0x1f, 1, db_scale_input),
AK4531_SINGLE("Mic Switch", 0, AK4531_MIC, 7, 1, 1),
AK4531_SINGLE("Mic Playback Switch", 0, AK4531_OUT_SW1, 0, 1, 0),
AK4531_DOUBLE("Mic Capture Switch", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 0, 0, 1, 0),
AK4531_DOUBLE("Mic Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 7, 7, 1, 0),
AK4531_DOUBLE("Mono1 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 6, 6, 1, 0),
AK4531_DOUBLE("Mono2 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 5, 5, 1, 0),
AK4531_SINGLE("AD Input Select", 0, AK4531_AD_IN, 0, 1, 0),
AK4531_SINGLE("Mic Boost (+30dB)", 0, AK4531_MIC_GAIN, 0, 1, 0)
};
static int snd_ak4531_free(struct snd_ak4531 *ak4531)
{
if (ak4531) {
if (ak4531->private_free)
ak4531->private_free(ak4531);
kfree(ak4531);
}
return 0;
}
static int snd_ak4531_dev_free(struct snd_device *device)
{
struct snd_ak4531 *ak4531 = device->device_data;
return snd_ak4531_free(ak4531);
}
static const u8 snd_ak4531_initial_map[0x19 + 1] = {
0x9f, /* 00: Master Volume Lch */
0x9f, /* 01: Master Volume Rch */
0x9f, /* 02: Voice Volume Lch */
0x9f, /* 03: Voice Volume Rch */
0x9f, /* 04: FM Volume Lch */
0x9f, /* 05: FM Volume Rch */
0x9f, /* 06: CD Audio Volume Lch */
0x9f, /* 07: CD Audio Volume Rch */
0x9f, /* 08: Line Volume Lch */
0x9f, /* 09: Line Volume Rch */
0x9f, /* 0a: Aux Volume Lch */
0x9f, /* 0b: Aux Volume Rch */
0x9f, /* 0c: Mono1 Volume */
0x9f, /* 0d: Mono2 Volume */
0x9f, /* 0e: Mic Volume */
0x87, /* 0f: Mono-out Volume */
0x00, /* 10: Output Mixer SW1 */
0x00, /* 11: Output Mixer SW2 */
0x00, /* 12: Lch Input Mixer SW1 */
0x00, /* 13: Rch Input Mixer SW1 */
0x00, /* 14: Lch Input Mixer SW2 */
0x00, /* 15: Rch Input Mixer SW2 */
0x00, /* 16: Reset & Power Down */
0x00, /* 17: Clock Select */
0x00, /* 18: AD Input Select */
0x01 /* 19: Mic Amp Setup */
};
int snd_ak4531_mixer(struct snd_card *card,
struct snd_ak4531 *_ak4531,
struct snd_ak4531 **rak4531)
{
unsigned int idx;
int err;
struct snd_ak4531 *ak4531;
static const struct snd_device_ops ops = {
.dev_free = snd_ak4531_dev_free,
};
if (snd_BUG_ON(!card || !_ak4531))
return -EINVAL;
if (rak4531)
*rak4531 = NULL;
ak4531 = kzalloc(sizeof(*ak4531), GFP_KERNEL);
if (ak4531 == NULL)
return -ENOMEM;
*ak4531 = *_ak4531;
mutex_init(&ak4531->reg_mutex);
err = snd_component_add(card, "AK4531");
if (err < 0) {
snd_ak4531_free(ak4531);
return err;
}
strcpy(card->mixername, "Asahi Kasei AK4531");
ak4531->write(ak4531, AK4531_RESET, 0x03); /* no RST, PD */
udelay(100);
ak4531->write(ak4531, AK4531_CLOCK, 0x00); /* CODEC ADC and CODEC DAC use {LR,B}CLK2 and run off LRCLK2 PLL */
for (idx = 0; idx <= 0x19; idx++) {
if (idx == AK4531_RESET || idx == AK4531_CLOCK)
continue;
ak4531->write(ak4531, idx, ak4531->regs[idx] = snd_ak4531_initial_map[idx]); /* recording source is mixer */
}
for (idx = 0; idx < ARRAY_SIZE(snd_ak4531_controls); idx++) {
err = snd_ctl_add(card, snd_ctl_new1(&snd_ak4531_controls[idx], ak4531));
if (err < 0) {
snd_ak4531_free(ak4531);
return err;
}
}
snd_ak4531_proc_init(card, ak4531);
err = snd_device_new(card, SNDRV_DEV_CODEC, ak4531, &ops);
if (err < 0) {
snd_ak4531_free(ak4531);
return err;
}
#if 0
snd_ak4531_dump(ak4531);
#endif
if (rak4531)
*rak4531 = ak4531;
return 0;
}
/*
* power management
*/
#ifdef CONFIG_PM
void snd_ak4531_suspend(struct snd_ak4531 *ak4531)
{
/* mute */
ak4531->write(ak4531, AK4531_LMASTER, 0x9f);
ak4531->write(ak4531, AK4531_RMASTER, 0x9f);
/* powerdown */
ak4531->write(ak4531, AK4531_RESET, 0x01);
}
void snd_ak4531_resume(struct snd_ak4531 *ak4531)
{
int idx;
/* initialize */
ak4531->write(ak4531, AK4531_RESET, 0x03);
udelay(100);
ak4531->write(ak4531, AK4531_CLOCK, 0x00);
/* restore mixer registers */
for (idx = 0; idx <= 0x19; idx++) {
if (idx == AK4531_RESET || idx == AK4531_CLOCK)
continue;
ak4531->write(ak4531, idx, ak4531->regs[idx]);
}
}
#endif
/*
* /proc interface
*/
static void snd_ak4531_proc_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_ak4531 *ak4531 = entry->private_data;
snd_iprintf(buffer, "Asahi Kasei AK4531\n\n");
snd_iprintf(buffer, "Recording source : %s\n"
"MIC gain : %s\n",
ak4531->regs[AK4531_AD_IN] & 1 ? "external" : "mixer",
ak4531->regs[AK4531_MIC_GAIN] & 1 ? "+30dB" : "+0dB");
}
static void
snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531)
{
snd_card_ro_proc_new(card, "ak4531", ak4531, snd_ak4531_proc_read);
}
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