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Diffstat (limited to 'sound/i2c/i2c.c')
-rw-r--r--sound/i2c/i2c.c126
1 files changed, 73 insertions, 53 deletions
diff --git a/sound/i2c/i2c.c b/sound/i2c/i2c.c
index e4e505b9d88..4677037f0c8 100644
--- a/sound/i2c/i2c.c
+++ b/sound/i2c/i2c.c
@@ -2,7 +2,7 @@
* Generic i2c interface for ALSA
*
* (c) 1998 Gerd Knorr <kraxel@cs.tu-berlin.de>
- * Modified for the ALSA driver by Jaroslav Kysela <perex@suse.cz>
+ * Modified for the ALSA driver 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
@@ -20,34 +20,38 @@
*
*/
-#include <sound/driver.h>
#include <linux/init.h>
#include <linux/slab.h>
+#include <linux/module.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <sound/core.h>
#include <sound/i2c.h>
-MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
+MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Generic i2c interface for ALSA");
MODULE_LICENSE("GPL");
-static int snd_i2c_bit_sendbytes(snd_i2c_device_t *device, unsigned char *bytes, int count);
-static int snd_i2c_bit_readbytes(snd_i2c_device_t *device, unsigned char *bytes, int count);
-static int snd_i2c_bit_probeaddr(snd_i2c_bus_t *bus, unsigned short addr);
+static int snd_i2c_bit_sendbytes(struct snd_i2c_device *device,
+ unsigned char *bytes, int count);
+static int snd_i2c_bit_readbytes(struct snd_i2c_device *device,
+ unsigned char *bytes, int count);
+static int snd_i2c_bit_probeaddr(struct snd_i2c_bus *bus,
+ unsigned short addr);
-static snd_i2c_ops_t snd_i2c_bit_ops = {
+static struct snd_i2c_ops snd_i2c_bit_ops = {
.sendbytes = snd_i2c_bit_sendbytes,
.readbytes = snd_i2c_bit_readbytes,
.probeaddr = snd_i2c_bit_probeaddr,
};
-static int snd_i2c_bus_free(snd_i2c_bus_t *bus)
+static int snd_i2c_bus_free(struct snd_i2c_bus *bus)
{
- snd_i2c_bus_t *slave;
- snd_i2c_device_t *device;
+ struct snd_i2c_bus *slave;
+ struct snd_i2c_device *device;
- snd_assert(bus != NULL, return -EINVAL);
+ if (snd_BUG_ON(!bus))
+ return -EINVAL;
while (!list_empty(&bus->devices)) {
device = snd_i2c_device(bus->devices.next);
snd_i2c_device_free(device);
@@ -66,17 +70,18 @@ static int snd_i2c_bus_free(snd_i2c_bus_t *bus)
return 0;
}
-static int snd_i2c_bus_dev_free(snd_device_t *device)
+static int snd_i2c_bus_dev_free(struct snd_device *device)
{
- snd_i2c_bus_t *bus = device->device_data;
+ struct snd_i2c_bus *bus = device->device_data;
return snd_i2c_bus_free(bus);
}
-int snd_i2c_bus_create(snd_card_t *card, const char *name, snd_i2c_bus_t *master, snd_i2c_bus_t **ri2c)
+int snd_i2c_bus_create(struct snd_card *card, const char *name,
+ struct snd_i2c_bus *master, struct snd_i2c_bus **ri2c)
{
- snd_i2c_bus_t *bus;
+ struct snd_i2c_bus *bus;
int err;
- static snd_device_ops_t ops = {
+ static struct snd_device_ops ops = {
.dev_free = snd_i2c_bus_dev_free,
};
@@ -84,7 +89,7 @@ int snd_i2c_bus_create(snd_card_t *card, const char *name, snd_i2c_bus_t *master
bus = kzalloc(sizeof(*bus), GFP_KERNEL);
if (bus == NULL)
return -ENOMEM;
- init_MUTEX(&bus->lock_mutex);
+ mutex_init(&bus->lock_mutex);
INIT_LIST_HEAD(&bus->devices);
INIT_LIST_HEAD(&bus->buses);
bus->card = card;
@@ -94,7 +99,8 @@ int snd_i2c_bus_create(snd_card_t *card, const char *name, snd_i2c_bus_t *master
bus->master = master;
}
strlcpy(bus->name, name, sizeof(bus->name));
- if ((err = snd_device_new(card, SNDRV_DEV_BUS, bus, &ops)) < 0) {
+ err = snd_device_new(card, SNDRV_DEV_BUS, bus, &ops);
+ if (err < 0) {
snd_i2c_bus_free(bus);
return err;
}
@@ -102,12 +108,16 @@ int snd_i2c_bus_create(snd_card_t *card, const char *name, snd_i2c_bus_t *master
return 0;
}
-int snd_i2c_device_create(snd_i2c_bus_t *bus, const char *name, unsigned char addr, snd_i2c_device_t **rdevice)
+EXPORT_SYMBOL(snd_i2c_bus_create);
+
+int snd_i2c_device_create(struct snd_i2c_bus *bus, const char *name,
+ unsigned char addr, struct snd_i2c_device **rdevice)
{
- snd_i2c_device_t *device;
+ struct snd_i2c_device *device;
*rdevice = NULL;
- snd_assert(bus != NULL, return -EINVAL);
+ if (snd_BUG_ON(!bus))
+ return -EINVAL;
device = kzalloc(sizeof(*device), GFP_KERNEL);
if (device == NULL)
return -ENOMEM;
@@ -119,7 +129,9 @@ int snd_i2c_device_create(snd_i2c_bus_t *bus, const char *name, unsigned char ad
return 0;
}
-int snd_i2c_device_free(snd_i2c_device_t *device)
+EXPORT_SYMBOL(snd_i2c_device_create);
+
+int snd_i2c_device_free(struct snd_i2c_device *device)
{
if (device->bus)
list_del(&device->list);
@@ -129,51 +141,58 @@ int snd_i2c_device_free(snd_i2c_device_t *device)
return 0;
}
-int snd_i2c_sendbytes(snd_i2c_device_t *device, unsigned char *bytes, int count)
+EXPORT_SYMBOL(snd_i2c_device_free);
+
+int snd_i2c_sendbytes(struct snd_i2c_device *device, unsigned char *bytes, int count)
{
return device->bus->ops->sendbytes(device, bytes, count);
}
+EXPORT_SYMBOL(snd_i2c_sendbytes);
-int snd_i2c_readbytes(snd_i2c_device_t *device, unsigned char *bytes, int count)
+int snd_i2c_readbytes(struct snd_i2c_device *device, unsigned char *bytes, int count)
{
return device->bus->ops->readbytes(device, bytes, count);
}
-int snd_i2c_probeaddr(snd_i2c_bus_t *bus, unsigned short addr)
+EXPORT_SYMBOL(snd_i2c_readbytes);
+
+int snd_i2c_probeaddr(struct snd_i2c_bus *bus, unsigned short addr)
{
return bus->ops->probeaddr(bus, addr);
}
+EXPORT_SYMBOL(snd_i2c_probeaddr);
+
/*
* bit-operations
*/
-static inline void snd_i2c_bit_hw_start(snd_i2c_bus_t *bus)
+static inline void snd_i2c_bit_hw_start(struct snd_i2c_bus *bus)
{
if (bus->hw_ops.bit->start)
bus->hw_ops.bit->start(bus);
}
-static inline void snd_i2c_bit_hw_stop(snd_i2c_bus_t *bus)
+static inline void snd_i2c_bit_hw_stop(struct snd_i2c_bus *bus)
{
if (bus->hw_ops.bit->stop)
bus->hw_ops.bit->stop(bus);
}
-static void snd_i2c_bit_direction(snd_i2c_bus_t *bus, int clock, int data)
+static void snd_i2c_bit_direction(struct snd_i2c_bus *bus, int clock, int data)
{
if (bus->hw_ops.bit->direction)
bus->hw_ops.bit->direction(bus, clock, data);
}
-static void snd_i2c_bit_set(snd_i2c_bus_t *bus, int clock, int data)
+static void snd_i2c_bit_set(struct snd_i2c_bus *bus, int clock, int data)
{
bus->hw_ops.bit->setlines(bus, clock, data);
}
#if 0
-static int snd_i2c_bit_clock(snd_i2c_bus_t *bus)
+static int snd_i2c_bit_clock(struct snd_i2c_bus *bus)
{
if (bus->hw_ops.bit->getclock)
return bus->hw_ops.bit->getclock(bus);
@@ -181,12 +200,12 @@ static int snd_i2c_bit_clock(snd_i2c_bus_t *bus)
}
#endif
-static int snd_i2c_bit_data(snd_i2c_bus_t *bus, int ack)
+static int snd_i2c_bit_data(struct snd_i2c_bus *bus, int ack)
{
return bus->hw_ops.bit->getdata(bus, ack);
}
-static void snd_i2c_bit_start(snd_i2c_bus_t *bus)
+static void snd_i2c_bit_start(struct snd_i2c_bus *bus)
{
snd_i2c_bit_hw_start(bus);
snd_i2c_bit_direction(bus, 1, 1); /* SCL - wr, SDA - wr */
@@ -195,7 +214,7 @@ static void snd_i2c_bit_start(snd_i2c_bus_t *bus)
snd_i2c_bit_set(bus, 0, 0);
}
-static void snd_i2c_bit_stop(snd_i2c_bus_t *bus)
+static void snd_i2c_bit_stop(struct snd_i2c_bus *bus)
{
snd_i2c_bit_set(bus, 0, 0);
snd_i2c_bit_set(bus, 1, 0);
@@ -203,14 +222,14 @@ static void snd_i2c_bit_stop(snd_i2c_bus_t *bus)
snd_i2c_bit_hw_stop(bus);
}
-static void snd_i2c_bit_send(snd_i2c_bus_t *bus, int data)
+static void snd_i2c_bit_send(struct snd_i2c_bus *bus, int data)
{
snd_i2c_bit_set(bus, 0, data);
snd_i2c_bit_set(bus, 1, data);
snd_i2c_bit_set(bus, 0, data);
}
-static int snd_i2c_bit_ack(snd_i2c_bus_t *bus)
+static int snd_i2c_bit_ack(struct snd_i2c_bus *bus)
{
int ack;
@@ -223,18 +242,19 @@ static int snd_i2c_bit_ack(snd_i2c_bus_t *bus)
return ack ? -EIO : 0;
}
-static int snd_i2c_bit_sendbyte(snd_i2c_bus_t *bus, unsigned char data)
+static int snd_i2c_bit_sendbyte(struct snd_i2c_bus *bus, unsigned char data)
{
int i, err;
for (i = 7; i >= 0; i--)
snd_i2c_bit_send(bus, !!(data & (1 << i)));
- if ((err = snd_i2c_bit_ack(bus)) < 0)
+ err = snd_i2c_bit_ack(bus);
+ if (err < 0)
return err;
return 0;
}
-static int snd_i2c_bit_readbyte(snd_i2c_bus_t *bus, int last)
+static int snd_i2c_bit_readbyte(struct snd_i2c_bus *bus, int last)
{
int i;
unsigned char data = 0;
@@ -252,20 +272,23 @@ static int snd_i2c_bit_readbyte(snd_i2c_bus_t *bus, int last)
return data;
}
-static int snd_i2c_bit_sendbytes(snd_i2c_device_t *device, unsigned char *bytes, int count)
+static int snd_i2c_bit_sendbytes(struct snd_i2c_device *device,
+ unsigned char *bytes, int count)
{
- snd_i2c_bus_t *bus = device->bus;
+ struct snd_i2c_bus *bus = device->bus;
int err, res = 0;
if (device->flags & SND_I2C_DEVICE_ADDRTEN)
return -EIO; /* not yet implemented */
snd_i2c_bit_start(bus);
- if ((err = snd_i2c_bit_sendbyte(bus, device->addr << 1)) < 0) {
+ err = snd_i2c_bit_sendbyte(bus, device->addr << 1);
+ if (err < 0) {
snd_i2c_bit_hw_stop(bus);
return err;
}
while (count-- > 0) {
- if ((err = snd_i2c_bit_sendbyte(bus, *bytes++)) < 0) {
+ err = snd_i2c_bit_sendbyte(bus, *bytes++);
+ if (err < 0) {
snd_i2c_bit_hw_stop(bus);
return err;
}
@@ -275,20 +298,23 @@ static int snd_i2c_bit_sendbytes(snd_i2c_device_t *device, unsigned char *bytes,
return res;
}
-static int snd_i2c_bit_readbytes(snd_i2c_device_t *device, unsigned char *bytes, int count)
+static int snd_i2c_bit_readbytes(struct snd_i2c_device *device,
+ unsigned char *bytes, int count)
{
- snd_i2c_bus_t *bus = device->bus;
+ struct snd_i2c_bus *bus = device->bus;
int err, res = 0;
if (device->flags & SND_I2C_DEVICE_ADDRTEN)
return -EIO; /* not yet implemented */
snd_i2c_bit_start(bus);
- if ((err = snd_i2c_bit_sendbyte(bus, (device->addr << 1) | 1)) < 0) {
+ err = snd_i2c_bit_sendbyte(bus, (device->addr << 1) | 1);
+ if (err < 0) {
snd_i2c_bit_hw_stop(bus);
return err;
}
while (count-- > 0) {
- if ((err = snd_i2c_bit_readbyte(bus, count == 0)) < 0) {
+ err = snd_i2c_bit_readbyte(bus, count == 0);
+ if (err < 0) {
snd_i2c_bit_hw_stop(bus);
return err;
}
@@ -299,7 +325,7 @@ static int snd_i2c_bit_readbytes(snd_i2c_device_t *device, unsigned char *bytes,
return res;
}
-static int snd_i2c_bit_probeaddr(snd_i2c_bus_t *bus, unsigned short addr)
+static int snd_i2c_bit_probeaddr(struct snd_i2c_bus *bus, unsigned short addr)
{
int err;
@@ -313,12 +339,6 @@ static int snd_i2c_bit_probeaddr(snd_i2c_bus_t *bus, unsigned short addr)
return err;
}
-EXPORT_SYMBOL(snd_i2c_bus_create);
-EXPORT_SYMBOL(snd_i2c_device_create);
-EXPORT_SYMBOL(snd_i2c_device_free);
-EXPORT_SYMBOL(snd_i2c_sendbytes);
-EXPORT_SYMBOL(snd_i2c_readbytes);
-EXPORT_SYMBOL(snd_i2c_probeaddr);
static int __init alsa_i2c_init(void)
{
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 17:29:04 +0000