path: root/drivers/media/video/tvp5150.c

/*
 * tvp5150 - Texas Instruments TVP5150A/AM1 video decoder driver
 *
 * Copyright (c) 2005,2006 Mauro Carvalho Chehab (mchehab@infradead.org)
 * This code is placed under the terms of the GNU General Public License v2
 */

#include <linux/i2c.h>
#include <linux/videodev.h>
#include <linux/delay.h>
#include <linux/video_decoder.h>
#include <media/v4l2-common.h>
#include <media/tvp5150.h>

#include "tvp5150_reg.h"

MODULE_DESCRIPTION("Texas Instruments TVP5150A video decoder driver");
MODULE_AUTHOR("Mauro Carvalho Chehab");
MODULE_LICENSE("GPL");

/* standard i2c insmod options */
static unsigned short normal_i2c[] = {
	0xb8 >> 1,
	0xba >> 1,
	I2C_CLIENT_END
};

I2C_CLIENT_INSMOD;

static int debug = 0;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0-1)");

#define tvp5150_err(fmt, arg...) do { \
	printk(KERN_ERR "%s %d-%04x: " fmt, c->driver->driver.name, \
	       i2c_adapter_id(c->adapter), c->addr , ## arg); } while (0)
#define tvp5150_info(fmt, arg...) do { \
	printk(KERN_INFO "%s %d-%04x: " fmt, c->driver->driver.name, \
	       i2c_adapter_id(c->adapter), c->addr , ## arg); } while (0)
#define tvp5150_dbg(num, fmt, arg...) \
	do { \
		if (debug >= num) \
			printk(KERN_DEBUG "%s debug %d-%04x: " fmt,\
				c->driver->driver.name, \
				i2c_adapter_id(c->adapter), \
				c->addr , ## arg); } while (0)

/* supported controls */
static struct v4l2_queryctrl tvp5150_qctrl[] = {
	{
		.id = V4L2_CID_BRIGHTNESS,
		.type = V4L2_CTRL_TYPE_INTEGER,
		.name = "Brightness",
		.minimum = 0,
		.maximum = 255,
		.step = 1,
		.default_value = 128,
		.flags = 0,
	}, {
		.id = V4L2_CID_CONTRAST,
		.type = V4L2_CTRL_TYPE_INTEGER,
		.name = "Contrast",
		.minimum = 0,
		.maximum = 255,
		.step = 0x1,
		.default_value = 128,
		.flags = 0,
	}, {
		 .id = V4L2_CID_SATURATION,
		 .type = V4L2_CTRL_TYPE_INTEGER,
		 .name = "Saturation",
		 .minimum = 0,
		 .maximum = 255,
		 .step = 0x1,
		 .default_value = 128,
		 .flags = 0,
	}, {
		.id = V4L2_CID_HUE,
		.type = V4L2_CTRL_TYPE_INTEGER,
		.name = "Hue",
		.minimum = -128,
		.maximum = 127,
		.step = 0x1,
		.default_value = 0,
		.flags = 0,
	}
};

struct tvp5150 {
	struct i2c_client *client;

	v4l2_std_id norm;	/* Current set standard */
	struct v4l2_routing route;
	int enable;
	int bright;
	int contrast;
	int hue;
	int sat;
};

static int tvp5150_read(struct i2c_client *c, unsigned char addr)
{
	unsigned char buffer[1];
	int rc;

	buffer[0] = addr;
	if (1 != (rc = i2c_master_send(c, buffer, 1)))
		tvp5150_dbg(0, "i2c i/o error: rc == %d (should be 1)\n", rc);

	msleep(10);

	if (1 != (rc = i2c_master_recv(c, buffer, 1)))
		tvp5150_dbg(0, "i2c i/o error: rc == %d (should be 1)\n", rc);

	tvp5150_dbg(2, "tvp5150: read 0x%02x = 0x%02x\n", addr, buffer[0]);

	return (buffer[0]);
}

static inline void tvp5150_write(struct i2c_client *c, unsigned char addr,