diff options
Diffstat (limited to 'drivers/staging/media/go7007/wis-uda1342.c')
| -rw-r--r-- | drivers/staging/media/go7007/wis-uda1342.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/drivers/staging/media/go7007/wis-uda1342.c b/drivers/staging/media/go7007/wis-uda1342.c new file mode 100644 index 000000000000..0127be2f3be0 --- /dev/null +++ b/drivers/staging/media/go7007/wis-uda1342.c @@ -0,0 +1,114 @@ +/* + * Copyright (C) 2005-2006 Micronas USA Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * 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/module.h> +#include <linux/init.h> +#include <linux/i2c.h> +#include <linux/videodev2.h> +#include <media/tvaudio.h> +#include <media/v4l2-common.h> + +#include "wis-i2c.h" + +static int write_reg(struct i2c_client *client, int reg, int value) +{ + /* UDA1342 wants MSB first, but SMBus sends LSB first */ + i2c_smbus_write_word_data(client, reg, swab16(value)); + return 0; +} + +static int wis_uda1342_command(struct i2c_client *client, + unsigned int cmd, void *arg) +{ + switch (cmd) { + case VIDIOC_S_AUDIO: + { + int *inp = arg; + + switch (*inp) { + case TVAUDIO_INPUT_TUNER: + write_reg(client, 0x00, 0x1441); /* select input 2 */ + break; + case TVAUDIO_INPUT_EXTERN: + write_reg(client, 0x00, 0x1241); /* select input 1 */ + break; + default: + printk(KERN_ERR "wis-uda1342: input %d not supported\n", + *inp); + break; + } + break; + } + default: + break; + } + return 0; +} + +static int wis_uda1342_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct i2c_adapter *adapter = client->adapter; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) + return -ENODEV; + + printk(KERN_DEBUG + "wis-uda1342: initializing UDA1342 at address %d on %s\n", + client->addr, adapter->name); + + write_reg(client, 0x00, 0x8000); /* reset registers */ + write_reg(client, 0x00, 0x1241); /* select input 1 */ + + return 0; +} + +static int wis_uda1342_remove(struct i2c_client *client) +{ + return 0; +} + +static const struct i2c_device_id wis_uda1342_id[] = { + { "wis_uda1342", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, wis_uda1342_id); + +static struct i2c_driver wis_uda1342_driver = { + .driver = { + .name = "WIS UDA1342 I2C driver", + }, + .probe = wis_uda1342_probe, + .remove = wis_uda1342_remove, + .command = wis_uda1342_command, + .id_table = wis_uda1342_id, +}; + +static int __init wis_uda1342_init(void) +{ + return i2c_add_driver(&wis_uda1342_driver); +} + +static void __exit wis_uda1342_cleanup(void) +{ + i2c_del_driver(&wis_uda1342_driver); +} + +module_init(wis_uda1342_init); +module_exit(wis_uda1342_cleanup); + +MODULE_LICENSE("GPL v2"); |