diff options
Diffstat (limited to 'drivers/media/video/wm8775.c')
| -rw-r--r-- | drivers/media/video/wm8775.c | 140 |
1 files changed, 51 insertions, 89 deletions
diff --git a/drivers/media/video/wm8775.c b/drivers/media/video/wm8775.c index 9f7e894ef962..869f9e7946b6 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); |