Staging: add the go7007 video driver

Todo:
	- checkpatch.pl cleanups
	- sparse cleanups
	- lots of little modules, should be merged together
	  and added to the build.
	- testing?
	- handle churn in v4l layer.

Many thanks to Ross Cohen <rcohen@snurgle.org> for cleanup patches on
this driver.

Cc: Ross Cohen <rcohen@snurgle.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 136 insertions, 0 deletions

diff --git a/drivers/staging/go7007/wis-uda1342.c b/drivers/staging/go7007/wis-uda1342.c
new file mode 100644
index 000000000000..28c10bf3a47b
--- /dev/null
+++ b/drivers/staging/go7007/wis-uda1342.c
@@ -0,0 +1,136 @@
+/*
+ * 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/version.h>
+#include <linux/i2c.h>
+#include <linux/videodev.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 struct i2c_driver wis_uda1342_driver;
+
+static struct i2c_client wis_uda1342_client_templ = {
+	.name		= "UDA1342 (WIS)",
+	.driver		= &wis_uda1342_driver,
+};
+
+static int wis_uda1342_detect(struct i2c_adapter *adapter, int addr, int kind)
+{
+	struct i2c_client *client;
+
+	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
+		return 0;
+
+	client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
+	if (client == NULL)
+		return -ENOMEM;
+	memcpy(client, &wis_uda1342_client_templ,
+			sizeof(wis_uda1342_client_templ));
+	client->adapter = adapter;
+	client->addr = addr;
+
+	printk(KERN_DEBUG
+		"wis-uda1342: initializing UDA1342 at address %d on %s\n",
+		addr, adapter->name);
+
+	write_reg(client, 0x00, 0x8000); /* reset registers */
+	write_reg(client, 0x00, 0x1241); /* select input 1 */
+
+	i2c_attach_client(client);
+	return 0;
+}
+
+static int wis_uda1342_detach(struct i2c_client *client)
+{
+	int r;
+
+	r = i2c_detach_client(client);
+	if (r < 0)
+		return r;
+
+	kfree(client);
+	return 0;
+}
+
+static struct i2c_driver wis_uda1342_driver = {
+	.driver = {
+		.name	= "WIS UDA1342 I2C driver",
+	},
+	.id		= I2C_DRIVERID_WIS_UDA1342,
+	.detach_client	= wis_uda1342_detach,
+	.command	= wis_uda1342_command,
+};
+
+static int __init wis_uda1342_init(void)
+{
+	int r;
+
+	r = i2c_add_driver(&wis_uda1342_driver);
+	if (r < 0)
+		return r;
+	return wis_i2c_add_driver(wis_uda1342_driver.id, wis_uda1342_detect);
+}
+
+static void __exit wis_uda1342_cleanup(void)
+{
+	wis_i2c_del_driver(wis_uda1342_detect);
+	i2c_del_driver(&wis_uda1342_driver);
+}
+
+module_init(wis_uda1342_init);
+module_exit(wis_uda1342_cleanup);
+
+MODULE_LICENSE("GPL v2");