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Diffstat (limited to 'sound/i2c/other/ak4114.c')
-rw-r--r--sound/i2c/other/ak4114.c145
1 files changed, 66 insertions, 79 deletions
diff --git a/sound/i2c/other/ak4114.c b/sound/i2c/other/ak4114.c
index 5bf4fca19e48..0e3a272c1490 100644
--- a/sound/i2c/other/ak4114.c
+++ b/sound/i2c/other/ak4114.c
@@ -1,23 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Routines for control of the AK4114 via I2C and 4-wire serial interface
* IEC958 (S/PDIF) receiver by Asahi Kasei
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
- *
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
#include <linux/slab.h>
@@ -53,21 +38,9 @@ static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg)
return ak4114->read(ak4114->private_data, reg);
}
-#if 0
-static void reg_dump(struct ak4114 *ak4114)
-{
- int i;
-
- printk(KERN_DEBUG "AK4114 REG DUMP:\n");
- for (i = 0; i < 0x20; i++)
- printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4114, i), i < sizeof(ak4114->regmap) ? ak4114->regmap[i] : 0);
-}
-#endif
-
static void snd_ak4114_free(struct ak4114 *chip)
{
- chip->init = 1; /* don't schedule new work */
- mb();
+ atomic_inc(&chip->wq_processing); /* don't schedule new work */
cancel_delayed_work_sync(&chip->work);
kfree(chip);
}
@@ -81,13 +54,13 @@ static int snd_ak4114_dev_free(struct snd_device *device)
int snd_ak4114_create(struct snd_card *card,
ak4114_read_t *read, ak4114_write_t *write,
- const unsigned char pgm[7], const unsigned char txcsb[5],
+ const unsigned char pgm[6], const unsigned char txcsb[5],
void *private_data, struct ak4114 **r_ak4114)
{
struct ak4114 *chip;
int err = 0;
unsigned char reg;
- static struct snd_device_ops ops = {
+ static const struct snd_device_ops ops = {
.dev_free = snd_ak4114_dev_free,
};
@@ -100,8 +73,10 @@ int snd_ak4114_create(struct snd_card *card,
chip->write = write;
chip->private_data = private_data;
INIT_DELAYED_WORK(&chip->work, ak4114_stats);
+ atomic_set(&chip->wq_processing, 0);
+ mutex_init(&chip->reinit_mutex);
- for (reg = 0; reg < 7; reg++)
+ for (reg = 0; reg < 6; reg++)
chip->regmap[reg] = pgm[reg];
for (reg = 0; reg < 5; reg++)
chip->txcsb[reg] = txcsb[reg];
@@ -111,7 +86,8 @@ int snd_ak4114_create(struct snd_card *card,
chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT);
chip->rcs1 = reg_read(chip, AK4114_REG_RCS1);
- if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
+ err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops);
+ if (err < 0)
goto __fail;
if (r_ak4114)
@@ -120,8 +96,9 @@ int snd_ak4114_create(struct snd_card *card,
__fail:
snd_ak4114_free(chip);
- return err < 0 ? err : -EIO;
+ return err;
}
+EXPORT_SYMBOL(snd_ak4114_create);
void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
{
@@ -131,6 +108,7 @@ void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char
reg_write(chip, reg,
(chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
}
+EXPORT_SYMBOL(snd_ak4114_reg_write);
static void ak4114_init_regs(struct ak4114 *chip)
{
@@ -142,7 +120,7 @@ static void ak4114_init_regs(struct ak4114 *chip)
/* release reset, but leave powerdown */
reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
udelay(200);
- for (reg = 1; reg < 7; reg++)
+ for (reg = 1; reg < 6; reg++)
reg_write(chip, reg, chip->regmap[reg]);
for (reg = 0; reg < 5; reg++)
reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
@@ -152,15 +130,16 @@ static void ak4114_init_regs(struct ak4114 *chip)
void snd_ak4114_reinit(struct ak4114 *chip)
{
- chip->init = 1;
- mb();
- flush_delayed_work(&chip->work);
- ak4114_init_regs(chip);
+ if (atomic_inc_return(&chip->wq_processing) == 1)
+ cancel_delayed_work_sync(&chip->work);
+ scoped_guard(mutex, &chip->reinit_mutex) {
+ ak4114_init_regs(chip);
+ }
/* bring up statistics / event queing */
- chip->init = 0;
- if (chip->kctls[0])
+ if (atomic_dec_and_test(&chip->wq_processing))
schedule_delayed_work(&chip->work, HZ / 10);
}
+EXPORT_SYMBOL(snd_ak4114_reinit);
static unsigned int external_rate(unsigned char rcs1)
{
@@ -190,13 +169,11 @@ static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
- long *ptr;
- spin_lock_irq(&chip->lock);
- ptr = (long *)(((char *)chip) + kcontrol->private_value);
- ucontrol->value.integer.value[0] = *ptr;
- *ptr = 0;
- spin_unlock_irq(&chip->lock);
+ guard(spinlock_irq)(&chip->lock);
+ ucontrol->value.integer.value[0] =
+ chip->errors[kcontrol->private_value];
+ chip->errors[kcontrol->private_value] = 0;
return 0;
}
@@ -330,14 +307,14 @@ static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
}
/* Don't forget to change AK4114_CONTROLS define!!! */
-static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
+static const struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
{
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = "IEC958 Parity Errors",
.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
.info = snd_ak4114_in_error_info,
.get = snd_ak4114_in_error_get,
- .private_value = offsetof(struct ak4114, parity_errors),
+ .private_value = AK4114_PARITY_ERRORS,
},
{
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
@@ -345,7 +322,7 @@ static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
.info = snd_ak4114_in_error_info,
.get = snd_ak4114_in_error_get,
- .private_value = offsetof(struct ak4114, v_bit_errors),
+ .private_value = AK4114_V_BIT_ERRORS,
},
{
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
@@ -353,7 +330,7 @@ static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
.info = snd_ak4114_in_error_info,
.get = snd_ak4114_in_error_get,
- .private_value = offsetof(struct ak4114, ccrc_errors),
+ .private_value = AK4114_CCRC_ERRORS,
},
{
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
@@ -361,7 +338,7 @@ static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
.info = snd_ak4114_in_error_info,
.get = snd_ak4114_in_error_get,
- .private_value = offsetof(struct ak4114, qcrc_errors),
+ .private_value = AK4114_QCRC_ERRORS,
},
{
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
@@ -462,9 +439,8 @@ static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,
static void snd_ak4114_proc_init(struct ak4114 *ak4114)
{
- struct snd_info_entry *entry;
- if (!snd_card_proc_new(ak4114->card, "ak4114", &entry))
- snd_info_set_text_ops(entry, ak4114, snd_ak4114_proc_regs_read);
+ snd_card_ro_proc_new(ak4114->card, "ak4114", ak4114,
+ snd_ak4114_proc_regs_read);
}
int snd_ak4114_build(struct ak4114 *ak4114,
@@ -505,6 +481,7 @@ int snd_ak4114_build(struct ak4114 *ak4114,
schedule_delayed_work(&ak4114->work, HZ / 10);
return 0;
}
+EXPORT_SYMBOL(snd_ak4114_build);
/* notify kcontrols if any parameters are changed */
static void ak4114_notify(struct ak4114 *ak4114,
@@ -560,6 +537,7 @@ int snd_ak4114_external_rate(struct ak4114 *ak4114)
rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
return external_rate(rcs1);
}
+EXPORT_SYMBOL(snd_ak4114_external_rate);
int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
{
@@ -573,21 +551,21 @@ int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
if (flags & AK4114_CHECK_NO_STAT)
goto __rate;
rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
- spin_lock_irqsave(&ak4114->lock, _flags);
- if (rcs0 & AK4114_PAR)
- ak4114->parity_errors++;
- if (rcs1 & AK4114_V)
- ak4114->v_bit_errors++;
- if (rcs1 & AK4114_CCRC)
- ak4114->ccrc_errors++;
- if (rcs1 & AK4114_QCRC)
- ak4114->qcrc_errors++;
- c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
- (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
- c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
- ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
- ak4114->rcs1 = rcs1;
- spin_unlock_irqrestore(&ak4114->lock, _flags);
+ scoped_guard(spinlock_irqsave, &ak4114->lock) {
+ if (rcs0 & AK4114_PAR)
+ ak4114->errors[AK4114_PARITY_ERRORS]++;
+ if (rcs1 & AK4114_V)
+ ak4114->errors[AK4114_V_BIT_ERRORS]++;
+ if (rcs1 & AK4114_CCRC)
+ ak4114->errors[AK4114_CCRC_ERRORS]++;
+ if (rcs1 & AK4114_QCRC)
+ ak4114->errors[AK4114_QCRC_ERRORS]++;
+ c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
+ (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
+ c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
+ ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
+ ak4114->rcs1 = rcs1;
+ }
ak4114_notify(ak4114, rcs0, rcs1, c0, c1);
if (ak4114->change_callback && (c0 | c1) != 0)
@@ -599,7 +577,6 @@ int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
if (snd_pcm_running(ak4114->capture_substream)) {
- // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
res = 1;
}
@@ -607,20 +584,30 @@ int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
}
return res;
}
+EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
static void ak4114_stats(struct work_struct *work)
{
struct ak4114 *chip = container_of(work, struct ak4114, work.work);
- if (!chip->init)
+ if (atomic_inc_return(&chip->wq_processing) == 1)
snd_ak4114_check_rate_and_errors(chip, chip->check_flags);
+ if (atomic_dec_and_test(&chip->wq_processing))
+ schedule_delayed_work(&chip->work, HZ / 10);
+}
- schedule_delayed_work(&chip->work, HZ / 10);
+#ifdef CONFIG_PM
+void snd_ak4114_suspend(struct ak4114 *chip)
+{
+ atomic_inc(&chip->wq_processing); /* don't schedule new work */
+ cancel_delayed_work_sync(&chip->work);
}
+EXPORT_SYMBOL(snd_ak4114_suspend);
-EXPORT_SYMBOL(snd_ak4114_create);
-EXPORT_SYMBOL(snd_ak4114_reg_write);
-EXPORT_SYMBOL(snd_ak4114_reinit);
-EXPORT_SYMBOL(snd_ak4114_build);
-EXPORT_SYMBOL(snd_ak4114_external_rate);
-EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
+void snd_ak4114_resume(struct ak4114 *chip)
+{
+ atomic_dec(&chip->wq_processing);
+ snd_ak4114_reinit(chip);
+}
+EXPORT_SYMBOL(snd_ak4114_resume);
+#endif
generated by cgit (git 2.34.1) at 2025-12-25 05:00:04 +0000