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+/*
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+ * Copyright (C) 2005-2006 Micronas USA Inc.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License (Version 2) as
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+ * published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software Foundation,
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+ * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/init.h>
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+#include <linux/i2c.h>
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+#include <linux/videodev2.h>
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+#include <media/v4l2-device.h>
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+#include <media/uda1342.h>
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+#include <linux/slab.h>
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+
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+static int write_reg(struct i2c_client *client, int reg, int value)
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+{
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+ /* UDA1342 wants MSB first, but SMBus sends LSB first */
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+ i2c_smbus_write_word_data(client, reg, swab16(value));
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+ return 0;
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+}
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+
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+static int uda1342_s_routing(struct v4l2_subdev *sd,
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+ u32 input, u32 output, u32 config)
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+{
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+ struct i2c_client *client = v4l2_get_subdevdata(sd);
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+
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+ switch (input) {
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+ case UDA1342_IN1:
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+ write_reg(client, 0x00, 0x1241); /* select input 1 */
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+ break;
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+ case UDA1342_IN2:
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+ write_reg(client, 0x00, 0x1441); /* select input 2 */
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+ break;
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+ default:
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+ v4l2_err(sd, "input %d not supported\n", input);
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+ break;
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+ }
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+ return 0;
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+}
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+
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+static const struct v4l2_subdev_audio_ops uda1342_audio_ops = {
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+ .s_routing = uda1342_s_routing,
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+};
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+
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+static const struct v4l2_subdev_ops uda1342_ops = {
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+ .audio = &uda1342_audio_ops,
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+};
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+
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+static int uda1342_probe(struct i2c_client *client,
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+ const struct i2c_device_id *id)
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+{
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+ struct i2c_adapter *adapter = client->adapter;
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+ struct v4l2_subdev *sd;
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+
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+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
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+ return -ENODEV;
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+
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+ dev_dbg(&client->dev, "initializing UDA1342 at address %d on %s\n",
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+ client->addr, adapter->name);
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+
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+ sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
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+ if (sd == NULL)
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+ return -ENOMEM;
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+
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+ v4l2_i2c_subdev_init(sd, client, &uda1342_ops);
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+
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+ write_reg(client, 0x00, 0x8000); /* reset registers */
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+ write_reg(client, 0x00, 0x1241); /* select input 1 */
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+
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+ v4l_info(client, "chip found @ 0x%02x (%s)\n",
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+ client->addr << 1, client->adapter->name);
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+
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+ return 0;
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+}
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+
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+static int uda1342_remove(struct i2c_client *client)
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+{
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+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
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+
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+ v4l2_device_unregister_subdev(sd);
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+ kfree(sd);
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+ return 0;
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+}
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+
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+static const struct i2c_device_id uda1342_id[] = {
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+ { "uda1342", 0 },
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+ { }
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+};
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+MODULE_DEVICE_TABLE(i2c, uda1342_id);
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+
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+static struct i2c_driver uda1342_driver = {
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+ .driver = {
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+ .name = "uda1342",
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+ },
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+ .probe = uda1342_probe,
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+ .remove = uda1342_remove,
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+ .id_table = uda1342_id,
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+};
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+
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+module_i2c_driver(uda1342_driver);
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+
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+MODULE_LICENSE("GPL v2");
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