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path: root/drivers/media/video/wm8775.c
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Diffstat (limited to 'drivers/media/video/wm8775.c')
-rw-r--r--drivers/media/video/wm8775.c140
1 files changed, 51 insertions, 89 deletions
diff --git a/drivers/media/video/wm8775.c b/drivers/media/video/wm8775.c
index 9f7e894ef96..869f9e7946b 100644
--- a/drivers/media/video/wm8775.c
+++ b/drivers/media/video/wm8775.c
@@ -34,6 +34,7 @@
#include <linux/videodev.h>
#include <media/v4l2-common.h>
#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-i2c-drv-legacy.h>
MODULE_DESCRIPTION("wm8775 driver");
MODULE_AUTHOR("Ulf Eklund, Hans Verkuil");
@@ -44,6 +45,7 @@ static unsigned short normal_i2c[] = { 0x36 >> 1, I2C_CLIENT_END };
I2C_CLIENT_INSMOD;
+
/* ----------------------------------------------------------------------- */
enum {
@@ -66,18 +68,15 @@ static int wm8775_write(struct i2c_client *client, int reg, u16 val)
return -1;
}
- for (i = 0; i < 3; i++) {
- if (i2c_smbus_write_byte_data(client, (reg << 1) |
- (val >> 8), val & 0xff) == 0) {
+ for (i = 0; i < 3; i++)
+ if (i2c_smbus_write_byte_data(client,
+ (reg << 1) | (val >> 8), val & 0xff) == 0)
return 0;
- }
- }
v4l_err(client, "I2C: cannot write %03x to register R%d\n", val, reg);
return -1;
}
-static int wm8775_command(struct i2c_client *client, unsigned int cmd,
- void *arg)
+static int wm8775_command(struct i2c_client *client, unsigned cmd, void *arg)
{
struct wm8775_state *state = i2c_get_clientdata(client);
struct v4l2_routing *route = arg;
@@ -126,7 +125,8 @@ static int wm8775_command(struct i2c_client *client, unsigned int cmd,
break;
case VIDIOC_G_CHIP_IDENT:
- return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_WM8775, 0);
+ return v4l2_chip_ident_i2c_client(client,
+ arg, V4L2_IDENT_WM8775, 0);
case VIDIOC_LOG_STATUS:
v4l_info(client, "Input: %d%s\n", state->input,
@@ -159,105 +159,67 @@ static int wm8775_command(struct i2c_client *client, unsigned int cmd,
* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
*/
-static struct i2c_driver i2c_driver;
-
-static int wm8775_attach(struct i2c_adapter *adapter, int address, int kind)
+static int wm8775_probe(struct i2c_client *client)
{
- struct i2c_client *client;
struct wm8775_state *state;
/* Check if the adapter supports the needed features */
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- return 0;
-
- client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
- if (client == 0)
- return -ENOMEM;
-
- client->addr = address;
- client->adapter = adapter;
- client->driver = &i2c_driver;
- snprintf(client->name, sizeof(client->name) - 1, "wm8775");
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
- v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
+ v4l_info(client, "chip found @ 0x%x (%s)\n",
+ client->addr << 1, client->adapter->name);
state = kmalloc(sizeof(struct wm8775_state), GFP_KERNEL);
- if (state == NULL) {
- kfree(client);
+ if (state == NULL)
return -ENOMEM;
- }
state->input = 2;
state->muted = 0;
i2c_set_clientdata(client, state);
- /* initialize wm8775 */
- wm8775_write(client, R23, 0x000); /* RESET */
- wm8775_write(client, R7, 0x000); /* Disable zero cross detect timeout */
- wm8775_write(client, R11, 0x021); /* Left justified, 24-bit mode */
- wm8775_write(client, R12, 0x102); /* Master mode, clock ratio 256fs */
- wm8775_write(client, R13, 0x000); /* Powered up */
- wm8775_write(client, R14, 0x1d4); /* ADC gain +2.5dB, enable zero cross */
- wm8775_write(client, R15, 0x1d4); /* ADC gain +2.5dB, enable zero cross */
- wm8775_write(client, R16, 0x1bf); /* ALC Stereo, ALC target level -1dB FS */
- /* max gain +8dB */
- wm8775_write(client, R17, 0x185); /* Enable gain control, use zero cross */
- /* detection, ALC hold time 42.6 ms */
- wm8775_write(client, R18, 0x0a2); /* ALC gain ramp up delay 34 s, */
- /* ALC gain ramp down delay 33 ms */
- wm8775_write(client, R19, 0x005); /* Enable noise gate, threshold -72dBfs */
- wm8775_write(client, R20, 0x07a); /* Transient window 4ms, lower PGA gain */
- /* limit -1dB */
- wm8775_write(client, R21, 0x102); /* LRBOTH = 1, use input 2. */
- i2c_attach_client(client);
-
+ /* Initialize wm8775 */
+
+ /* RESET */
+ wm8775_write(client, R23, 0x000);
+ /* Disable zero cross detect timeout */
+ wm8775_write(client, R7, 0x000);
+ /* Left justified, 24-bit mode */
+ wm8775_write(client, R11, 0x021);
+ /* Master mode, clock ratio 256fs */
+ wm8775_write(client, R12, 0x102);
+ /* Powered up */
+ wm8775_write(client, R13, 0x000);
+ /* ADC gain +2.5dB, enable zero cross */
+ wm8775_write(client, R14, 0x1d4);
+ /* ADC gain +2.5dB, enable zero cross */
+ wm8775_write(client, R15, 0x1d4);
+ /* ALC Stereo, ALC target level -1dB FS max gain +8dB */
+ wm8775_write(client, R16, 0x1bf);
+ /* Enable gain control, use zero cross detection,
+ ALC hold time 42.6 ms */
+ wm8775_write(client, R17, 0x185);
+ /* ALC gain ramp up delay 34 s, ALC gain ramp down delay 33 ms */
+ wm8775_write(client, R18, 0x0a2);
+ /* Enable noise gate, threshold -72dBfs */
+ wm8775_write(client, R19, 0x005);
+ /* Transient window 4ms, lower PGA gain limit -1dB */
+ wm8775_write(client, R20, 0x07a);
+ /* LRBOTH = 1, use input 2. */
+ wm8775_write(client, R21, 0x102);
return 0;
}
-static int wm8775_probe(struct i2c_adapter *adapter)
+static int wm8775_remove(struct i2c_client *client)
{
- if (adapter->class & I2C_CLASS_TV_ANALOG)
- return i2c_probe(adapter, &addr_data, wm8775_attach);
+ kfree(i2c_get_clientdata(client));
return 0;
}
-static int wm8775_detach(struct i2c_client *client)
-{
- struct wm8775_state *state = i2c_get_clientdata(client);
- int err;
-
- err = i2c_detach_client(client);
- if (err) {
- return err;
- }
- kfree(state);
- kfree(client);
-
- return 0;
-}
-
-/* ----------------------------------------------------------------------- */
-
-/* i2c implementation */
-static struct i2c_driver i2c_driver = {
- .driver = {
- .name = "wm8775",
- },
- .id = I2C_DRIVERID_WM8775,
- .attach_adapter = wm8775_probe,
- .detach_client = wm8775_detach,
- .command = wm8775_command,
+static struct v4l2_i2c_driver_data v4l2_i2c_data = {
+ .name = "wm8775",
+ .driverid = I2C_DRIVERID_WM8775,
+ .command = wm8775_command,
+ .probe = wm8775_probe,
+ .remove = wm8775_remove,
};
-
-static int __init wm8775_init_module(void)
-{
- return i2c_add_driver(&i2c_driver);
-}
-
-static void __exit wm8775_cleanup_module(void)
-{
- i2c_del_driver(&i2c_driver);
-}
-
-module_init(wm8775_init_module);
-module_exit(wm8775_cleanup_module);
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-31 17:12:57 +0000