/* * 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. */ #include <linux/module.h> #include <linux/init.h> #include <linux/i2c.h> #include <linux/videodev2.h> #include <media/v4l2-device.h> #include <media/i2c/uda1342.h> #include <linux/slab.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 uda1342_s_routing(struct v4l2_subdev *sd, u32 input, u32 output, u32 config) { struct i2c_client *client = v4l2_get_subdevdata(sd); switch (input) { case UDA1342_IN1: write_reg(client, 0x00, 0x1241); /* select input 1 */ break; case UDA1342_IN2: write_reg(client, 0x00, 0x1441); /* select input 2 */ break; default: v4l2_err(sd, "input %d not supported\n", input); break; } return 0; } static const struct v4l2_subdev_audio_ops uda1342_audio_ops = { .s_routing = uda1342_s_routing, }; static const struct v4l2_subdev_ops uda1342_ops = { .audio = &uda1342_audio_ops, }; static int uda1342_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct i2c_adapter *adapter = client->adapter; struct v4l2_subdev *sd; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) return -ENODEV; dev_dbg(&client->dev, "initializing UDA1342 at address %d on %s\n", client->addr, adapter->name); sd = devm_kzalloc(&client->dev, sizeof(*sd), GFP_KERNEL); if (sd == NULL) return -ENOMEM; v4l2_i2c_subdev_init(sd, client, &uda1342_ops); write_reg(client, 0x00, 0x8000); /* reset registers */ write_reg(client, 0x00, 0x1241); /* select input 1 */ v4l_info(client, "chip found @ 0x%02x (%s)\n", client->addr << 1, client->adapter->name); return 0; } static int uda1342_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); v4l2_device_unregister_subdev(sd); return 0; } static const struct i2c_device_id uda1342_id[] = { { "uda1342", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, uda1342_id); static struct i2c_driver uda1342_driver = { .driver = { .name = "uda1342", }, .probe = uda1342_probe, .remove = uda1342_remove, .id_table = uda1342_id, }; module_i2c_driver(uda1342_driver); MODULE_LICENSE("GPL v2");