V4L/DVB : Add S5PV210 TV out driver support

drivers/media/video/samsung/tv20/ddc.c

Index: drivers/media/video/samsung/tv20/ddc.c
diff --git a/drivers/media/video/samsung/tv20/ddc.c b/drivers/media/video/samsung/tv20/ddc.c
new file mode 100644
index 0000000000000000000000000000000000000000..6fb861865b0c6575f29910aec5c766ffc626efb0
--- /dev/null
+++ b/drivers/media/video/samsung/tv20/ddc.c
@@ -0,0 +1,141 @@
+/* linux/drivers/media/video/samsung/tv20/ddc.c
+*
+* Copyright (c) 2010 Samsung Electronics Co., Ltd.
+*		http://www.samsung.com/
+*
+* S5PV210 - ddc interface file for Samsung TVOut driver
+*
+* 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.
+*/
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+
+#define I2C_DRIVERID_S5P_HDCP		510
+#define S5P_HDCP_I2C_ADDR		0x74
+
+const static u16 ignore[] = { I2C_CLIENT_END };
+const static u16 normal_addr[] = {
+	(S5P_HDCP_I2C_ADDR >> 1),
+	I2C_CLIENT_END
+};
+
+const static u16 *forces[] = { NULL };
+
+static struct i2c_client_address_data ddc_addr = {
+	.normal_i2c	= normal_addr,
+	.probe		= ignore,
+	.ignore		= ignore,
+	.forces		= forces,
+};
+
+struct i2c_client *ddc_port;
+
+int ddc_read(u8 subaddr, u8 *data, u16 len)
+{
+	u8 addr = subaddr;
+	int ret = 0;
+
+	struct i2c_msg msg[] = {
+		[0] = {
+			.addr	= ddc_port->addr,
+			.flags	= 0,
+			.len	= 1,
+			.buf	= &addr
+		},
+		[1] = {
+			.addr	= ddc_port->addr,
+			.flags	= I2C_M_RD,
+			.len	= len,
+			.buf	= data
+		}
+	};
+
+	if (i2c_transfer(ddc_port->adapter, msg, 2) != 2)
+		ret = -EIO;
+
+	return ret;
+}
+
+
+int ddc_write(u8 *data, u16 len)
+{
+	int ret = 0;
+
+	if (i2c_master_send(ddc_port, (const char *) data, len) != len)
+		ret = -EIO;
+
+	return ret;
+}
+
+static int __devinit ddc_probe(struct i2c_client *client,
+			const struct i2c_device_id *dev_id)
+{
+	int ret = 0;
+
+	ddc_port = client;
+
+	dev_info(&client->adapter->dev, "attached s5p_ddc "
+		"into i2c adapter successfully\n");
+
+	return ret;
+}
+
+static int ddc_remove(struct i2c_client *client)
+{
+	dev_info(&client->adapter->dev, "detached s5p_ddc "
+		"from i2c adapter successfully\n");
+
+	return 0;
+}
+
+static int ddc_suspend(struct i2c_client *cl, pm_message_t mesg)
+{
+	return 0;
+};
+
+static int ddc_resume(struct i2c_client *cl)
+{
+	return 0;
+};
+
+static struct i2c_device_id ddc_idtable[] = {
+	{"s5p_ddc", 0},
+};
+
+MODULE_DEVICE_TABLE(i2c, ddc_idtable);
+
+static struct i2c_driver ddc_driver = {
+	.driver = {
+		.name = "s5p_ddc",
+	},
+/* Removed id member due to the change of i2c_driver structure of i2c.h */
+/*	.id 		= I2C_DRIVERID_S5P_HDCP,*/
+	.id_table 	= ddc_idtable,
+	.probe 		= ddc_probe,
+	.remove 	= __devexit_p(ddc_remove),
+	.address_data 	= &ddc_addr,
+
+	.suspend	= ddc_suspend,
+	.resume 	= ddc_resume,
+};
+
+static int __init ddc_init(void)
+{
+	return i2c_add_driver(&ddc_driver);
+}
+
+static void __exit ddc_exit(void)
+{
+	i2c_del_driver(&ddc_driver);
+}
+
+MODULE_AUTHOR("SangPil Moon <sangpil.moon@samsung.com>");
+MODULE_DESCRIPTION("Driver for SMDKV210 I2C DDC devices");
+
+MODULE_LICENSE("GPL");
+
+module_init(ddc_init);
+module_exit(ddc_exit);