[alsa-devel] [PATCH] AOA: Convert onyx and tas codecs to new-style i2c drivers (v3)
Jean Delvare
khali at linux-fr.org
Wed Apr 15 14:22:25 CEST 2009
The legacy i2c binding model is going away soon, so convert the AOA
codec drivers to the new model or they'll break.
Signed-off-by: Jean Delvare <khali at linux-fr.org>
Cc: Johannes Berg <johannes at sipsolutions.net>
Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Tested-by: Andreas Schwab <schwab at linux-m68k.org>
---
Johannes, this is a reworked patch which assumes that the onyx codec
probing can fail. It's not exactly clean but that's the easiest
approach for now. Can you please give it a try? Thanks.
sound/aoa/codecs/onyx.c | 76 ++++++++++++++++++++++++++++++++---------------
sound/aoa/codecs/tas.c | 66 +++++++++++++++++++++++++---------------
2 files changed, 95 insertions(+), 47 deletions(-)
--- linux-2.6.30-rc2.orig/sound/aoa/codecs/onyx.c 2009-04-15 09:55:20.000000000 +0200
+++ linux-2.6.30-rc2/sound/aoa/codecs/onyx.c 2009-04-15 14:07:50.000000000 +0200
@@ -47,7 +47,7 @@ MODULE_DESCRIPTION("pcm3052 (onyx) codec
struct onyx {
/* cache registers 65 to 80, they are write-only! */
u8 cache[16];
- struct i2c_client i2c;
+ struct i2c_client *i2c;
struct aoa_codec codec;
u32 initialised:1,
spdif_locked:1,
@@ -72,7 +72,7 @@ static int onyx_read_register(struct ony
*value = onyx->cache[reg-FIRSTREGISTER];
return 0;
}
- v = i2c_smbus_read_byte_data(&onyx->i2c, reg);
+ v = i2c_smbus_read_byte_data(onyx->i2c, reg);
if (v < 0)
return -1;
*value = (u8)v;
@@ -84,7 +84,7 @@ static int onyx_write_register(struct on
{
int result;
- result = i2c_smbus_write_byte_data(&onyx->i2c, reg, value);
+ result = i2c_smbus_write_byte_data(onyx->i2c, reg, value);
if (!result)
onyx->cache[reg-FIRSTREGISTER] = value;
return result;
@@ -996,12 +996,45 @@ static void onyx_exit_codec(struct aoa_c
onyx->codec.soundbus_dev->detach_codec(onyx->codec.soundbus_dev, onyx);
}
-static struct i2c_driver onyx_driver;
-
static int onyx_create(struct i2c_adapter *adapter,
struct device_node *node,
int addr)
{
+ struct i2c_board_info info;
+ struct i2c_client *client;
+
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ strlcpy(info.type, "aoa_codec_onyx", I2C_NAME_SIZE);
+ info.addr = addr;
+ info.platform_data = node;
+ client = i2c_new_device(adapter, &info);
+ if (!client)
+ return -ENODEV;
+
+ /*
+ * We know the driver is already loaded, so the device should be
+ * already bound. If not it means binding failed, which suggests
+ * the device doesn't really exist and should be deleted.
+ * Ideally this would be replaced by better checks _before_
+ * instantiating the device.
+ */
+ if (!client->driver) {
+ i2c_unregister_device(client);
+ return -ENODEV;
+ }
+
+ /*
+ * Let i2c-core delete that device on driver removal.
+ * This is safe because i2c-core holds the core_lock mutex for us.
+ */
+ list_add_tail(&client->detected, &client->driver->clients);
+ return 0;
+}
+
+static int onyx_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device_node *node = client->dev.platform_data;
struct onyx *onyx;
u8 dummy;
@@ -1011,20 +1044,12 @@ static int onyx_create(struct i2c_adapte
return -ENOMEM;
mutex_init(&onyx->mutex);
- onyx->i2c.driver = &onyx_driver;
- onyx->i2c.adapter = adapter;
- onyx->i2c.addr = addr & 0x7f;
- strlcpy(onyx->i2c.name, "onyx audio codec", I2C_NAME_SIZE);
-
- if (i2c_attach_client(&onyx->i2c)) {
- printk(KERN_ERR PFX "failed to attach to i2c\n");
- goto fail;
- }
+ onyx->i2c = client;
+ i2c_set_clientdata(client, onyx);
/* we try to read from register ONYX_REG_CONTROL
* to check if the codec is present */
if (onyx_read_register(onyx, ONYX_REG_CONTROL, &dummy) != 0) {
- i2c_detach_client(&onyx->i2c);
printk(KERN_ERR PFX "failed to read control register\n");
goto fail;
}
@@ -1036,14 +1061,14 @@ static int onyx_create(struct i2c_adapte
onyx->codec.node = of_node_get(node);
if (aoa_codec_register(&onyx->codec)) {
- i2c_detach_client(&onyx->i2c);
goto fail;
}
printk(KERN_DEBUG PFX "created and attached onyx instance\n");
return 0;
fail:
+ i2c_set_clientdata(client, NULL);
kfree(onyx);
- return -EINVAL;
+ return -ENODEV;
}
static int onyx_i2c_attach(struct i2c_adapter *adapter)
@@ -1080,28 +1105,33 @@ static int onyx_i2c_attach(struct i2c_ad
return onyx_create(adapter, NULL, 0x47);
}
-static int onyx_i2c_detach(struct i2c_client *client)
+static int onyx_i2c_remove(struct i2c_client *client)
{
- struct onyx *onyx = container_of(client, struct onyx, i2c);
- int err;
+ struct onyx *onyx = i2c_get_clientdata(client);
- if ((err = i2c_detach_client(client)))
- return err;
aoa_codec_unregister(&onyx->codec);
of_node_put(onyx->codec.node);
if (onyx->codec_info)
kfree(onyx->codec_info);
+ i2c_set_clientdata(client, onyx);
kfree(onyx);
return 0;
}
+static const struct i2c_device_id onyx_i2c_id[] = {
+ { "aoa_codec_onyx", 0 },
+ { }
+};
+
static struct i2c_driver onyx_driver = {
.driver = {
.name = "aoa_codec_onyx",
.owner = THIS_MODULE,
},
.attach_adapter = onyx_i2c_attach,
- .detach_client = onyx_i2c_detach,
+ .probe = onyx_i2c_probe,
+ .remove = onyx_i2c_remove,
+ .id_table = onyx_i2c_id,
};
static int __init onyx_init(void)
--- linux-2.6.30-rc2.orig/sound/aoa/codecs/tas.c 2009-04-15 09:55:20.000000000 +0200
+++ linux-2.6.30-rc2/sound/aoa/codecs/tas.c 2009-04-15 09:56:39.000000000 +0200
@@ -82,7 +82,7 @@ MODULE_DESCRIPTION("tas codec driver for
struct tas {
struct aoa_codec codec;
- struct i2c_client i2c;
+ struct i2c_client *i2c;
u32 mute_l:1, mute_r:1 ,
controls_created:1 ,
drc_enabled:1,
@@ -108,9 +108,9 @@ static struct tas *codec_to_tas(struct a
static inline int tas_write_reg(struct tas *tas, u8 reg, u8 len, u8 *data)
{
if (len == 1)
- return i2c_smbus_write_byte_data(&tas->i2c, reg, *data);
+ return i2c_smbus_write_byte_data(tas->i2c, reg, *data);
else
- return i2c_smbus_write_i2c_block_data(&tas->i2c, reg, len, data);
+ return i2c_smbus_write_i2c_block_data(tas->i2c, reg, len, data);
}
static void tas3004_set_drc(struct tas *tas)
@@ -882,12 +882,34 @@ static void tas_exit_codec(struct aoa_co
}
-static struct i2c_driver tas_driver;
-
static int tas_create(struct i2c_adapter *adapter,
struct device_node *node,
int addr)
{
+ struct i2c_board_info info;
+ struct i2c_client *client;
+
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ strlcpy(info.type, "aoa_codec_tas", I2C_NAME_SIZE);
+ info.addr = addr;
+ info.platform_data = node;
+
+ client = i2c_new_device(adapter, &info);
+ if (!client)
+ return -ENODEV;
+
+ /*
+ * Let i2c-core delete that device on driver removal.
+ * This is safe because i2c-core holds the core_lock mutex for us.
+ */
+ list_add_tail(&client->detected, &client->driver->clients);
+ return 0;
+}
+
+static int tas_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device_node *node = client->dev.platform_data;
struct tas *tas;
tas = kzalloc(sizeof(struct tas), GFP_KERNEL);
@@ -896,17 +918,11 @@ static int tas_create(struct i2c_adapter
return -ENOMEM;
mutex_init(&tas->mtx);
- tas->i2c.driver = &tas_driver;
- tas->i2c.adapter = adapter;
- tas->i2c.addr = addr;
+ tas->i2c = client;
+ i2c_set_clientdata(client, tas);
+
/* seems that half is a saner default */
tas->drc_range = TAS3004_DRC_MAX / 2;
- strlcpy(tas->i2c.name, "tas audio codec", I2C_NAME_SIZE);
-
- if (i2c_attach_client(&tas->i2c)) {
- printk(KERN_ERR PFX "failed to attach to i2c\n");
- goto fail;
- }
strlcpy(tas->codec.name, "tas", MAX_CODEC_NAME_LEN);
tas->codec.owner = THIS_MODULE;
@@ -915,14 +931,12 @@ static int tas_create(struct i2c_adapter
tas->codec.node = of_node_get(node);
if (aoa_codec_register(&tas->codec)) {
- goto detach;
+ goto fail;
}
printk(KERN_DEBUG
"snd-aoa-codec-tas: tas found, addr 0x%02x on %s\n",
- addr, node->full_name);
+ (unsigned int)client->addr, node->full_name);
return 0;
- detach:
- i2c_detach_client(&tas->i2c);
fail:
mutex_destroy(&tas->mtx);
kfree(tas);
@@ -970,14 +984,11 @@ static int tas_i2c_attach(struct i2c_ada
return -ENODEV;
}
-static int tas_i2c_detach(struct i2c_client *client)
+static int tas_i2c_remove(struct i2c_client *client)
{
- struct tas *tas = container_of(client, struct tas, i2c);
- int err;
+ struct tas *tas = i2c_get_clientdata(client);
u8 tmp = TAS_ACR_ANALOG_PDOWN;
- if ((err = i2c_detach_client(client)))
- return err;
aoa_codec_unregister(&tas->codec);
of_node_put(tas->codec.node);
@@ -989,13 +1000,20 @@ static int tas_i2c_detach(struct i2c_cli
return 0;
}
+static const struct i2c_device_id tas_i2c_id[] = {
+ { "aoa_codec_tas", 0 },
+ { }
+};
+
static struct i2c_driver tas_driver = {
.driver = {
.name = "aoa_codec_tas",
.owner = THIS_MODULE,
},
.attach_adapter = tas_i2c_attach,
- .detach_client = tas_i2c_detach,
+ .probe = tas_i2c_probe,
+ .remove = tas_i2c_remove,
+ .id_table = tas_i2c_id,
};
static int __init tas_init(void)
--
Jean Delvare
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