tvp7002.c

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/* Texas Instruments Triple 8-/10-BIT 165-/110-MSPS Video and Graphics
 * Digitizer with Horizontal PLL registers
 *
 * Copyright (C) 2009 Texas Instruments Inc
 * Author: Santiago Nunez-Corrales <[email protected]>
 *
 * This code is partially based upon the TVP5150 driver
 * written by Mauro Carvalho Chehab ([email protected]),
 * the TVP514x driver written by Vaibhav Hiremath <[email protected]>
 * and the TVP7002 driver in the TI LSP 2.10.00.14. Revisions by
 * Muralidharan Karicheri and Snehaprabha Narnakaje (TI).
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <linux/module.h>
#include <linux/v4l2-dv-timings.h>
#include <media/tvp7002.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ctrls.h>
#include "tvp7002_reg.h"

MODULE_DESCRIPTION("TI TVP7002 Video and Graphics Digitizer driver");
MODULE_AUTHOR("Santiago Nunez-Corrales <[email protected]>");
MODULE_LICENSE("GPL");

/* Module Name */
#define TVP7002_MODULE_NAME "tvp7002"

/* I2C retry attempts */
#define I2C_RETRY_COUNT     (5)

/* End of registers */
#define TVP7002_EOR     0x5c

/* Read write definition for registers */
#define TVP7002_READ        0
#define TVP7002_WRITE       1
#define TVP7002_RESERVED    2

/* Interlaced vs progressive mask and shift */
#define TVP7002_IP_SHIFT    5
#define TVP7002_INPR_MASK   (0x01 << TVP7002_IP_SHIFT)

/* Shift for CPL and LPF registers */
#define TVP7002_CL_SHIFT    8
#define TVP7002_CL_MASK     0x0f

/* Debug functions */
static bool debug;
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debug level (0-2)");

/* Structure for register values */
struct i2c_reg_value {
    u8 reg;
    u8 value;
    u8 type;
};

/*
 * Register default values (according to tvp7002 datasheet)
 * In the case of read-only registers, the value (0xff) is
 * never written. R/W functionality is controlled by the
 * writable bit in the register struct definition.
 */
static const struct i2c_reg_value tvp7002_init_default[] = {
    { TVP7002_CHIP_REV, 0xff, TVP7002_READ },
    { TVP7002_HPLL_FDBK_DIV_MSBS, 0x67, TVP7002_WRITE },
    { TVP7002_HPLL_FDBK_DIV_LSBS, 0x20, TVP7002_WRITE },
    { TVP7002_HPLL_CRTL, 0xa0, TVP7002_WRITE },
    { TVP7002_HPLL_PHASE_SEL, 0x80, TVP7002_WRITE },
    { TVP7002_CLAMP_START, 0x32, TVP7002_WRITE },
    { TVP7002_CLAMP_W, 0x20, TVP7002_WRITE },
    { TVP7002_HSYNC_OUT_W, 0x60, TVP7002_WRITE },
    { TVP7002_B_FINE_GAIN, 0x00, TVP7002_WRITE },
    { TVP7002_G_FINE_GAIN, 0x00, TVP7002_WRITE },
    { TVP7002_R_FINE_GAIN, 0x00, TVP7002_WRITE },
    { TVP7002_B_FINE_OFF_MSBS, 0x80, TVP7002_WRITE },
    { TVP7002_G_FINE_OFF_MSBS, 0x80, TVP7002_WRITE },
    { TVP7002_R_FINE_OFF_MSBS, 0x80, TVP7002_WRITE },
    { TVP7002_SYNC_CTL_1, 0x20, TVP7002_WRITE },
    { TVP7002_HPLL_AND_CLAMP_CTL, 0x2e, TVP7002_WRITE },
    { TVP7002_SYNC_ON_G_THRS, 0x5d, TVP7002_WRITE },
    { TVP7002_SYNC_SEPARATOR_THRS, 0x47, TVP7002_WRITE },
    { TVP7002_HPLL_PRE_COAST, 0x00, TVP7002_WRITE },
    { TVP7002_HPLL_POST_COAST, 0x00, TVP7002_WRITE },
    { TVP7002_SYNC_DETECT_STAT, 0xff, TVP7002_READ },
    { TVP7002_OUT_FORMATTER, 0x47, TVP7002_WRITE },
    { TVP7002_MISC_CTL_1, 0x01, TVP7002_WRITE },
    { TVP7002_MISC_CTL_2, 0x00, TVP7002_WRITE },
    { TVP7002_MISC_CTL_3, 0x01, TVP7002_WRITE },
    { TVP7002_IN_MUX_SEL_1, 0x00, TVP7002_WRITE },
    { TVP7002_IN_MUX_SEL_2, 0x67, TVP7002_WRITE },
    { TVP7002_B_AND_G_COARSE_GAIN, 0x77, TVP7002_WRITE },
    { TVP7002_R_COARSE_GAIN, 0x07, TVP7002_WRITE },
    { TVP7002_FINE_OFF_LSBS, 0x00, TVP7002_WRITE },
    { TVP7002_B_COARSE_OFF, 0x10, TVP7002_WRITE },
    { TVP7002_G_COARSE_OFF, 0x10, TVP7002_WRITE },
    { TVP7002_R_COARSE_OFF, 0x10, TVP7002_WRITE },
    { TVP7002_HSOUT_OUT_START, 0x08, TVP7002_WRITE },
    { TVP7002_MISC_CTL_4, 0x00, TVP7002_WRITE },
    { TVP7002_B_DGTL_ALC_OUT_LSBS, 0xff, TVP7002_READ },
    { TVP7002_G_DGTL_ALC_OUT_LSBS, 0xff, TVP7002_READ },
    { TVP7002_R_DGTL_ALC_OUT_LSBS, 0xff, TVP7002_READ },
    { TVP7002_AUTO_LVL_CTL_ENABLE, 0x80, TVP7002_WRITE },
    { TVP7002_DGTL_ALC_OUT_MSBS, 0xff, TVP7002_READ },
    { TVP7002_AUTO_LVL_CTL_FILTER, 0x53, TVP7002_WRITE },
    { 0x29, 0x08, TVP7002_RESERVED },
    { TVP7002_FINE_CLAMP_CTL, 0x07, TVP7002_WRITE },
    /* PWR_CTL is controlled only by the probe and reset functions */
    { TVP7002_PWR_CTL, 0x00, TVP7002_RESERVED },
    { TVP7002_ADC_SETUP, 0x50, TVP7002_WRITE },
    { TVP7002_COARSE_CLAMP_CTL, 0x00, TVP7002_WRITE },
    { TVP7002_SOG_CLAMP, 0x80, TVP7002_WRITE },
    { TVP7002_RGB_COARSE_CLAMP_CTL, 0x8c, TVP7002_WRITE },
    { TVP7002_SOG_COARSE_CLAMP_CTL, 0x04, TVP7002_WRITE },
    { TVP7002_ALC_PLACEMENT, 0x5a, TVP7002_WRITE },
    { 0x32, 0x18, TVP7002_RESERVED },
    { 0x33, 0x60, TVP7002_RESERVED },
    { TVP7002_MVIS_STRIPPER_W, 0xff, TVP7002_RESERVED },
    { TVP7002_VSYNC_ALGN, 0x10, TVP7002_WRITE },
    { TVP7002_SYNC_BYPASS, 0x00, TVP7002_WRITE },
    { TVP7002_L_FRAME_STAT_LSBS, 0xff, TVP7002_READ },
    { TVP7002_L_FRAME_STAT_MSBS, 0xff, TVP7002_READ },
    { TVP7002_CLK_L_STAT_LSBS, 0xff, TVP7002_READ },
    { TVP7002_CLK_L_STAT_MSBS, 0xff, TVP7002_READ },
    { TVP7002_HSYNC_W, 0xff, TVP7002_READ },
    { TVP7002_VSYNC_W, 0xff, TVP7002_READ },
    { TVP7002_L_LENGTH_TOL, 0x03, TVP7002_WRITE },
    { 0x3e, 0x60, TVP7002_RESERVED },
    { TVP7002_VIDEO_BWTH_CTL, 0x01, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_LSBS, 0x01, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_MSBS, 0x2c, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_LSBS, 0x06, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_MSBS, 0x2c, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_START_L_OFF, 0x05, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_START_L_OFF, 0x00, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_DURATION, 0x1e, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_DURATION, 0x00, TVP7002_WRITE },
    { TVP7002_FBIT_F_0_START_L_OFF, 0x00, TVP7002_WRITE },
    { TVP7002_FBIT_F_1_START_L_OFF, 0x00, TVP7002_WRITE },
    { TVP7002_YUV_Y_G_COEF_LSBS, 0xe3, TVP7002_WRITE },
    { TVP7002_YUV_Y_G_COEF_MSBS, 0x16, TVP7002_WRITE },
    { TVP7002_YUV_Y_B_COEF_LSBS, 0x4f, TVP7002_WRITE },
    { TVP7002_YUV_Y_B_COEF_MSBS, 0x02, TVP7002_WRITE },
    { TVP7002_YUV_Y_R_COEF_LSBS, 0xce, TVP7002_WRITE },
    { TVP7002_YUV_Y_R_COEF_MSBS, 0x06, TVP7002_WRITE },
    { TVP7002_YUV_U_G_COEF_LSBS, 0xab, TVP7002_WRITE },
    { TVP7002_YUV_U_G_COEF_MSBS, 0xf3, TVP7002_WRITE },
    { TVP7002_YUV_U_B_COEF_LSBS, 0x00, TVP7002_WRITE },
    { TVP7002_YUV_U_B_COEF_MSBS, 0x10, TVP7002_WRITE },
    { TVP7002_YUV_U_R_COEF_LSBS, 0x55, TVP7002_WRITE },
    { TVP7002_YUV_U_R_COEF_MSBS, 0xfc, TVP7002_WRITE },
    { TVP7002_YUV_V_G_COEF_LSBS, 0x78, TVP7002_WRITE },
    { TVP7002_YUV_V_G_COEF_MSBS, 0xf1, TVP7002_WRITE },
    { TVP7002_YUV_V_B_COEF_LSBS, 0x88, TVP7002_WRITE },
    { TVP7002_YUV_V_B_COEF_MSBS, 0xfe, TVP7002_WRITE },
    { TVP7002_YUV_V_R_COEF_LSBS, 0x00, TVP7002_WRITE },
    { TVP7002_YUV_V_R_COEF_MSBS, 0x10, TVP7002_WRITE },
    /* This signals end of register values */
    { TVP7002_EOR, 0xff, TVP7002_RESERVED }
};

/* Register parameters for 480P */
static const struct i2c_reg_value tvp7002_parms_480P[] = {
    { TVP7002_HPLL_FDBK_DIV_MSBS, 0x35, TVP7002_WRITE },
    { TVP7002_HPLL_FDBK_DIV_LSBS, 0xa0, TVP7002_WRITE },
    { TVP7002_HPLL_CRTL, 0x02, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_LSBS, 0x91, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_MSBS, 0x00, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_LSBS, 0x0B, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_MSBS, 0x00, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_START_L_OFF, 0x03, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_START_L_OFF, 0x01, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_DURATION, 0x13, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_DURATION, 0x13, TVP7002_WRITE },
    { TVP7002_ALC_PLACEMENT, 0x18, TVP7002_WRITE },
    { TVP7002_CLAMP_START, 0x06, TVP7002_WRITE },
    { TVP7002_CLAMP_W, 0x10, TVP7002_WRITE },
    { TVP7002_HPLL_PRE_COAST, 0x03, TVP7002_WRITE },
    { TVP7002_HPLL_POST_COAST, 0x03, TVP7002_WRITE },
    { TVP7002_EOR, 0xff, TVP7002_RESERVED }
};

/* Register parameters for 576P */
static const struct i2c_reg_value tvp7002_parms_576P[] = {
    { TVP7002_HPLL_FDBK_DIV_MSBS, 0x36, TVP7002_WRITE },
    { TVP7002_HPLL_FDBK_DIV_LSBS, 0x00, TVP7002_WRITE },
    { TVP7002_HPLL_CRTL, 0x18, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_LSBS, 0x9B, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_MSBS, 0x00, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_LSBS, 0x0F, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_MSBS, 0x00, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_START_L_OFF, 0x00, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_START_L_OFF, 0x00, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_DURATION, 0x2D, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_DURATION, 0x00, TVP7002_WRITE },
    { TVP7002_ALC_PLACEMENT, 0x18, TVP7002_WRITE },
    { TVP7002_CLAMP_START, 0x06, TVP7002_WRITE },
    { TVP7002_CLAMP_W, 0x10, TVP7002_WRITE },
    { TVP7002_HPLL_PRE_COAST, 0x03, TVP7002_WRITE },
    { TVP7002_HPLL_POST_COAST, 0x03, TVP7002_WRITE },
    { TVP7002_EOR, 0xff, TVP7002_RESERVED }
};

/* Register parameters for 1080I60 */
static const struct i2c_reg_value tvp7002_parms_1080I60[] = {
    { TVP7002_HPLL_FDBK_DIV_MSBS, 0x89, TVP7002_WRITE },
    { TVP7002_HPLL_FDBK_DIV_LSBS, 0x80, TVP7002_WRITE },
    { TVP7002_HPLL_CRTL, 0x98, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_LSBS, 0x06, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_MSBS, 0x01, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_LSBS, 0x8a, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_MSBS, 0x08, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_START_L_OFF, 0x02, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_START_L_OFF, 0x02, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_DURATION, 0x16, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_DURATION, 0x17, TVP7002_WRITE },
    { TVP7002_ALC_PLACEMENT, 0x5a, TVP7002_WRITE },
    { TVP7002_CLAMP_START, 0x32, TVP7002_WRITE },
    { TVP7002_CLAMP_W, 0x20, TVP7002_WRITE },
    { TVP7002_HPLL_PRE_COAST, 0x01, TVP7002_WRITE },
    { TVP7002_HPLL_POST_COAST, 0x00, TVP7002_WRITE },
    { TVP7002_EOR, 0xff, TVP7002_RESERVED }
};

/* Register parameters for 1080P60 */
static const struct i2c_reg_value tvp7002_parms_1080P60[] = {
    { TVP7002_HPLL_FDBK_DIV_MSBS, 0x89, TVP7002_WRITE },
    { TVP7002_HPLL_FDBK_DIV_LSBS, 0x80, TVP7002_WRITE },
    { TVP7002_HPLL_CRTL, 0xE0, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_LSBS, 0x06, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_MSBS, 0x01, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_LSBS, 0x8a, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_MSBS, 0x08, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_START_L_OFF, 0x02, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_START_L_OFF, 0x02, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_DURATION, 0x16, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_DURATION, 0x17, TVP7002_WRITE },
    { TVP7002_ALC_PLACEMENT, 0x5a, TVP7002_WRITE },
    { TVP7002_CLAMP_START, 0x32, TVP7002_WRITE },
    { TVP7002_CLAMP_W, 0x20, TVP7002_WRITE },
    { TVP7002_HPLL_PRE_COAST, 0x01, TVP7002_WRITE },
    { TVP7002_HPLL_POST_COAST, 0x00, TVP7002_WRITE },
    { TVP7002_EOR, 0xff, TVP7002_RESERVED }
};

/* Register parameters for 1080I50 */
static const struct i2c_reg_value tvp7002_parms_1080I50[] = {
    { TVP7002_HPLL_FDBK_DIV_MSBS, 0xa5, TVP7002_WRITE },
    { TVP7002_HPLL_FDBK_DIV_LSBS, 0x00, TVP7002_WRITE },
    { TVP7002_HPLL_CRTL, 0x98, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_LSBS, 0x06, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_MSBS, 0x01, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_LSBS, 0x8a, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_MSBS, 0x08, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_START_L_OFF, 0x02, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_START_L_OFF, 0x02, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_DURATION, 0x16, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_DURATION, 0x17, TVP7002_WRITE },
    { TVP7002_ALC_PLACEMENT, 0x5a, TVP7002_WRITE },
    { TVP7002_CLAMP_START, 0x32, TVP7002_WRITE },
    { TVP7002_CLAMP_W, 0x20, TVP7002_WRITE },
    { TVP7002_HPLL_PRE_COAST, 0x01, TVP7002_WRITE },
    { TVP7002_HPLL_POST_COAST, 0x00, TVP7002_WRITE },
    { TVP7002_EOR, 0xff, TVP7002_RESERVED }
};

/* Register parameters for 720P60 */
static const struct i2c_reg_value tvp7002_parms_720P60[] = {
    { TVP7002_HPLL_FDBK_DIV_MSBS, 0x67, TVP7002_WRITE },
    { TVP7002_HPLL_FDBK_DIV_LSBS, 0x20, TVP7002_WRITE },
    { TVP7002_HPLL_CRTL, 0xa0, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_LSBS, 0x47, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_MSBS, 0x01, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_LSBS, 0x4B, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_MSBS, 0x06, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_START_L_OFF, 0x05, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_START_L_OFF, 0x00, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_DURATION, 0x2D, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_DURATION, 0x00, TVP7002_WRITE },
    { TVP7002_ALC_PLACEMENT, 0x5a, TVP7002_WRITE },
    { TVP7002_CLAMP_START, 0x32, TVP7002_WRITE },
    { TVP7002_CLAMP_W, 0x20, TVP7002_WRITE },
    { TVP7002_HPLL_PRE_COAST, 0x00, TVP7002_WRITE },
    { TVP7002_HPLL_POST_COAST, 0x00, TVP7002_WRITE },
    { TVP7002_EOR, 0xff, TVP7002_RESERVED }
};

/* Register parameters for 720P50 */
static const struct i2c_reg_value tvp7002_parms_720P50[] = {
    { TVP7002_HPLL_FDBK_DIV_MSBS, 0x7b, TVP7002_WRITE },
    { TVP7002_HPLL_FDBK_DIV_LSBS, 0xc0, TVP7002_WRITE },
    { TVP7002_HPLL_CRTL, 0x98, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_LSBS, 0x47, TVP7002_WRITE },
    { TVP7002_AVID_START_PIXEL_MSBS, 0x01, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_LSBS, 0x4B, TVP7002_WRITE },
    { TVP7002_AVID_STOP_PIXEL_MSBS, 0x06, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_START_L_OFF, 0x05, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_START_L_OFF, 0x00, TVP7002_WRITE },
    { TVP7002_VBLK_F_0_DURATION, 0x2D, TVP7002_WRITE },
    { TVP7002_VBLK_F_1_DURATION, 0x00, TVP7002_WRITE },
    { TVP7002_ALC_PLACEMENT, 0x5a, TVP7002_WRITE },
    { TVP7002_CLAMP_START, 0x32, TVP7002_WRITE },
    { TVP7002_CLAMP_W, 0x20, TVP7002_WRITE },
    { TVP7002_HPLL_PRE_COAST, 0x01, TVP7002_WRITE },
    { TVP7002_HPLL_POST_COAST, 0x00, TVP7002_WRITE },
    { TVP7002_EOR, 0xff, TVP7002_RESERVED }
};

/* Preset definition for handling device operation */
struct tvp7002_preset_definition {
    u32 preset;
    struct v4l2_dv_timings timings;
    const struct i2c_reg_value *p_settings;
    enum v4l2_colorspace color_space;
    enum v4l2_field scanmode;
    u16 progressive;
    u16 lines_per_frame;
    u16 cpl_min;
    u16 cpl_max;
};

/* Struct list for digital video presets */
static const struct tvp7002_preset_definition tvp7002_presets[] = {
    {
        V4L2_DV_720P60,
        V4L2_DV_BT_CEA_1280X720P60,
        tvp7002_parms_720P60,
        V4L2_COLORSPACE_REC709,
        V4L2_FIELD_NONE,
        1,
        0x2EE,
        135,
        153
    },
    {
        V4L2_DV_1080I60,
        V4L2_DV_BT_CEA_1920X1080I60,
        tvp7002_parms_1080I60,
        V4L2_COLORSPACE_REC709,
        V4L2_FIELD_INTERLACED,
        0,
        0x465,
        181,
        205
    },
    {
        V4L2_DV_1080I50,
        V4L2_DV_BT_CEA_1920X1080I50,
        tvp7002_parms_1080I50,
        V4L2_COLORSPACE_REC709,
        V4L2_FIELD_INTERLACED,
        0,
        0x465,
        217,
        245
    },
    {
        V4L2_DV_720P50,
        V4L2_DV_BT_CEA_1280X720P50,
        tvp7002_parms_720P50,
        V4L2_COLORSPACE_REC709,
        V4L2_FIELD_NONE,
        1,
        0x2EE,
        163,
        183
    },
    {
        V4L2_DV_1080P60,
        V4L2_DV_BT_CEA_1920X1080P60,
        tvp7002_parms_1080P60,
        V4L2_COLORSPACE_REC709,
        V4L2_FIELD_NONE,
        1,
        0x465,
        90,
        102
    },
    {
        V4L2_DV_480P59_94,
        V4L2_DV_BT_CEA_720X480P59_94,
        tvp7002_parms_480P,
        V4L2_COLORSPACE_SMPTE170M,
        V4L2_FIELD_NONE,
        1,
        0x20D,
        0xffff,
        0xffff
    },
    {
        V4L2_DV_576P50,
        V4L2_DV_BT_CEA_720X576P50,
        tvp7002_parms_576P,
        V4L2_COLORSPACE_SMPTE170M,
        V4L2_FIELD_NONE,
        1,
        0x271,
        0xffff,
        0xffff
    }
};

#define NUM_PRESETS ARRAY_SIZE(tvp7002_presets)

/* Device definition */
struct tvp7002 {
    struct v4l2_subdev sd;
    struct v4l2_ctrl_handler hdl;
    const struct tvp7002_config *pdata;

    int ver;
    int streaming;

    const struct tvp7002_preset_definition *current_preset;
};

/*
 * to_tvp7002 - Obtain device handler TVP7002
 * @sd: ptr to v4l2_subdev struct
 *
 * Returns device handler tvp7002.
 */
static inline struct tvp7002 *to_tvp7002(struct v4l2_subdev *sd)
{
    return container_of(sd, struct tvp7002, sd);
}

static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
    return &container_of(ctrl->handler, struct tvp7002, hdl)->sd;
}

/*
 * tvp7002_read - Read a value from a register in an TVP7002
 * @sd: ptr to v4l2_subdev struct
 * @addr: TVP7002 register address
 * @dst: pointer to 8-bit destination
 *
 * Returns value read if successful, or non-zero (-1) otherwise.
 */
static int tvp7002_read(struct v4l2_subdev *sd, u8 addr, u8 *dst)
{
    struct i2c_client *c = v4l2_get_subdevdata(sd);
    int retry;
    int error;

    for (retry = 0; retry < I2C_RETRY_COUNT; retry++) {
        error = i2c_smbus_read_byte_data(c, addr);

        if (error >= 0) {
            *dst = (u8)error;
            return 0;
        }

        msleep_interruptible(10);
    }
    v4l2_err(sd, "TVP7002 read error %d\n", error);
    return error;
}

/*
 * tvp7002_read_err() - Read a register value with error code
 * @sd: pointer to standard V4L2 sub-device structure
 * @reg: destination register
 * @val: value to be read
 * @err: pointer to error value
 *
 * Read a value in a register and save error value in pointer.
 * Also update the register table if successful
 */
static inline void tvp7002_read_err(struct v4l2_subdev *sd, u8 reg,
                            u8 *dst, int *err)
{
    if (!*err)
        *err = tvp7002_read(sd, reg, dst);
}

/*
 * tvp7002_write() - Write a value to a register in TVP7002
 * @sd: ptr to v4l2_subdev struct
 * @addr: TVP7002 register address
 * @value: value to be written to the register
 *
 * Write a value to a register in an TVP7002 decoder device.
 * Returns zero if successful, or non-zero otherwise.
 */
static int tvp7002_write(struct v4l2_subdev *sd, u8 addr, u8 value)
{
    struct i2c_client *c;
    int retry;
    int error;

    c = v4l2_get_subdevdata(sd);

    for (retry = 0; retry < I2C_RETRY_COUNT; retry++) {
        error = i2c_smbus_write_byte_data(c, addr, value);

        if (error >= 0)
            return 0;

        v4l2_warn(sd, "Write: retry ... %d\n", retry);
        msleep_interruptible(10);
    }
    v4l2_err(sd, "TVP7002 write error %d\n", error);
    return error;
}

/*
 * tvp7002_write_err() - Write a register value with error code
 * @sd: pointer to standard V4L2 sub-device structure
 * @reg: destination register
 * @val: value to be written
 * @err: pointer to error value
 *
 * Write a value in a register and save error value in pointer.
 * Also update the register table if successful
 */
static inline void tvp7002_write_err(struct v4l2_subdev *sd, u8 reg,
                            u8 val, int *err)
{
    if (!*err)
        *err = tvp7002_write(sd, reg, val);
}

/*
 * tvp7002_g_chip_ident() - Get chip identification number
 * @sd: ptr to v4l2_subdev struct
 * @chip: ptr to v4l2_dbg_chip_ident struct
 *
 * Obtains the chip's identification number.
 * Returns zero or -EINVAL if read operation fails.
 */
static int tvp7002_g_chip_ident(struct v4l2_subdev *sd,
                    struct v4l2_dbg_chip_ident *chip)
{
    u8 rev;
    int error;
    struct i2c_client *client = v4l2_get_subdevdata(sd);

    error = tvp7002_read(sd, TVP7002_CHIP_REV, &rev);

    if (error < 0)
        return error;

    return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_TVP7002, rev);
}

/*
 * tvp7002_write_inittab() - Write initialization values
 * @sd: ptr to v4l2_subdev struct
 * @regs: ptr to i2c_reg_value struct
 *
 * Write initialization values.
 * Returns zero or -EINVAL if read operation fails.
 */
static int tvp7002_write_inittab(struct v4l2_subdev *sd,
                    const struct i2c_reg_value *regs)
{
    int error = 0;

    /* Initialize the first (defined) registers */
    while (TVP7002_EOR != regs->reg) {
        if (TVP7002_WRITE == regs->type)
            tvp7002_write_err(sd, regs->reg, regs->value, &error);
        regs++;
    }

    return error;
}

/*
 * tvp7002_s_dv_preset() - Set digital video preset
 * @sd: ptr to v4l2_subdev struct
 * @dv_preset: ptr to v4l2_dv_preset struct
 *
 * Set the digital video preset for a TVP7002 decoder device.
 * Returns zero when successful or -EINVAL if register access fails.
 */
static int tvp7002_s_dv_preset(struct v4l2_subdev *sd,
                    struct v4l2_dv_preset *dv_preset)
{
    struct tvp7002 *device = to_tvp7002(sd);
    u32 preset;
    int i;

    for (i = 0; i < NUM_PRESETS; i++) {
        preset = tvp7002_presets[i].preset;
        if (preset == dv_preset->preset) {
            device->current_preset = &tvp7002_presets[i];
            return tvp7002_write_inittab(sd, tvp7002_presets[i].p_settings);
        }
    }

    return -EINVAL;
}

static int tvp7002_s_dv_timings(struct v4l2_subdev *sd,
                    struct v4l2_dv_timings *dv_timings)
{
    struct tvp7002 *device = to_tvp7002(sd);
    const struct v4l2_bt_timings *bt = &dv_timings->bt;
    int i;

    if (dv_timings->type != V4L2_DV_BT_656_1120)
        return -EINVAL;
    for (i = 0; i < NUM_PRESETS; i++) {
        const struct v4l2_bt_timings *t = &tvp7002_presets[i].timings.bt;

        if (!memcmp(bt, t, &bt->standards - &bt->width)) {
            device->current_preset = &tvp7002_presets[i];
            return tvp7002_write_inittab(sd, tvp7002_presets[i].p_settings);
        }
    }
    return -EINVAL;
}

static int tvp7002_g_dv_timings(struct v4l2_subdev *sd,
                    struct v4l2_dv_timings *dv_timings)
{
    struct tvp7002 *device = to_tvp7002(sd);

    *dv_timings = device->current_preset->timings;
    return 0;
}

/*
 * tvp7002_s_ctrl() - Set a control
 * @ctrl: ptr to v4l2_ctrl struct
 *
 * Set a control in TVP7002 decoder device.
 * Returns zero when successful or -EINVAL if register access fails.
 */
static int tvp7002_s_ctrl(struct v4l2_ctrl *ctrl)
{
    struct v4l2_subdev *sd = to_sd(ctrl);
    int error = 0;

    switch (ctrl->id) {
    case V4L2_CID_GAIN:
        tvp7002_write_err(sd, TVP7002_R_FINE_GAIN, ctrl->val, &error);
        tvp7002_write_err(sd, TVP7002_G_FINE_GAIN, ctrl->val, &error);
        tvp7002_write_err(sd, TVP7002_B_FINE_GAIN, ctrl->val, &error);
        return error;
    }
    return -EINVAL;
}

/*
 * tvp7002_mbus_fmt() - V4L2 decoder interface handler for try/s/g_mbus_fmt
 * @sd: pointer to standard V4L2 sub-device structure
 * @f: pointer to mediabus format structure
 *
 * Negotiate the image capture size and mediabus format.
 * There is only one possible format, so this single function works for
 * get, set and try.
 */
static int tvp7002_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *f)
{
    struct tvp7002 *device = to_tvp7002(sd);
    struct v4l2_dv_enum_preset e_preset;
    int error;

    /* Calculate height and width based on current standard */
    error = v4l_fill_dv_preset_info(device->current_preset->preset, &e_preset);
    if (error)
        return error;

    f->width = e_preset.width;
    f->height = e_preset.height;
    f->code = V4L2_MBUS_FMT_YUYV10_1X20;
    f->field = device->current_preset->scanmode;
    f->colorspace = device->current_preset->color_space;

    v4l2_dbg(1, debug, sd, "MBUS_FMT: Width - %d, Height - %d",
            f->width, f->height);
    return 0;
}

/*
 * tvp7002_query_dv_preset() - query DV preset
 * @sd: pointer to standard V4L2 sub-device structure
 * @qpreset: standard V4L2 v4l2_dv_preset structure
 *
 * Returns the current DV preset by TVP7002. If no active input is
 * detected, returns -EINVAL
 */
static int tvp7002_query_dv(struct v4l2_subdev *sd, int *index)
{
    const struct tvp7002_preset_definition *presets = tvp7002_presets;
    u8 progressive;
    u32 lpfr;
    u32 cpln;
    int error = 0;
    u8 lpf_lsb;
    u8 lpf_msb;
    u8 cpl_lsb;
    u8 cpl_msb;

    /* Return invalid index if no active input is detected */
    *index = NUM_PRESETS;

    /* Read standards from device registers */
    tvp7002_read_err(sd, TVP7002_L_FRAME_STAT_LSBS, &lpf_lsb, &error);
    tvp7002_read_err(sd, TVP7002_L_FRAME_STAT_MSBS, &lpf_msb, &error);

    if (error < 0)
        return error;

    tvp7002_read_err(sd, TVP7002_CLK_L_STAT_LSBS, &cpl_lsb, &error);
    tvp7002_read_err(sd, TVP7002_CLK_L_STAT_MSBS, &cpl_msb, &error);

    if (error < 0)
        return error;

    /* Get lines per frame, clocks per line and interlaced/progresive */
    lpfr = lpf_lsb | ((TVP7002_CL_MASK & lpf_msb) << TVP7002_CL_SHIFT);
    cpln = cpl_lsb | ((TVP7002_CL_MASK & cpl_msb) << TVP7002_CL_SHIFT);
    progressive = (lpf_msb & TVP7002_INPR_MASK) >> TVP7002_IP_SHIFT;

    /* Do checking of video modes */
    for (*index = 0; *index < NUM_PRESETS; (*index)++, presets++)
        if (lpfr == presets->lines_per_frame &&
            progressive == presets->progressive) {
            if (presets->cpl_min == 0xffff)
                break;
            if (cpln >= presets->cpl_min && cpln <= presets->cpl_max)
                break;
        }

    if (*index == NUM_PRESETS) {
        v4l2_dbg(1, debug, sd, "detection failed: lpf = %x, cpl = %x\n",
                                lpfr, cpln);
        return -ENOLINK;
    }

    /* Update lines per frame and clocks per line info */
    v4l2_dbg(1, debug, sd, "detected preset: %d\n", *index);
    return 0;
}

static int tvp7002_query_dv_preset(struct v4l2_subdev *sd,
                    struct v4l2_dv_preset *qpreset)
{
    int index;
    int err = tvp7002_query_dv(sd, &index);

    if (err || index == NUM_PRESETS) {
        qpreset->preset = V4L2_DV_INVALID;
        if (err == -ENOLINK)
            err = 0;
        return err;
    }
    qpreset->preset = tvp7002_presets[index].preset;
    return 0;
}

static int tvp7002_query_dv_timings(struct v4l2_subdev *sd,
                    struct v4l2_dv_timings *timings)
{
    int index;
    int err = tvp7002_query_dv(sd, &index);

    if (err)
        return err;
    *timings = tvp7002_presets[index].timings;
    return 0;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
/*
 * tvp7002_g_register() - Get the value of a register
 * @sd: ptr to v4l2_subdev struct
 * @reg: ptr to v4l2_dbg_register struct
 *
 * Get the value of a TVP7002 decoder device register.
 * Returns zero when successful, -EINVAL if register read fails or
 * access to I2C client fails, -EPERM if the call is not allowed
 * by disabled CAP_SYS_ADMIN.
 */
static int tvp7002_g_register(struct v4l2_subdev *sd,
                        struct v4l2_dbg_register *reg)
{
    struct i2c_client *client = v4l2_get_subdevdata(sd);
    u8 val;
    int ret;

    if (!v4l2_chip_match_i2c_client(client, &reg->match))
        return -EINVAL;
    if (!capable(CAP_SYS_ADMIN))
        return -EPERM;

    ret = tvp7002_read(sd, reg->reg & 0xff, &val);
    reg->val = val;
    return ret;
}

/*
 * tvp7002_s_register() - set a control
 * @sd: ptr to v4l2_subdev struct
 * @reg: ptr to v4l2_dbg_register struct
 *
 * Get the value of a TVP7002 decoder device register.
 * Returns zero when successful, -EINVAL if register read fails or
 * -EPERM if call not allowed.
 */
static int tvp7002_s_register(struct v4l2_subdev *sd,
                        struct v4l2_dbg_register *reg)
{
    struct i2c_client *client = v4l2_get_subdevdata(sd);

    if (!v4l2_chip_match_i2c_client(client, &reg->match))
        return -EINVAL;
    if (!capable(CAP_SYS_ADMIN))
        return -EPERM;

    return tvp7002_write(sd, reg->reg & 0xff, reg->val & 0xff);
}
#endif

/*
 * tvp7002_enum_mbus_fmt() - Enum supported mediabus formats
 * @sd: pointer to standard V4L2 sub-device structure
 * @index: format index
 * @code: pointer to mediabus format
 *
 * Enumerate supported mediabus formats.
 */

static int tvp7002_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned index,
                    enum v4l2_mbus_pixelcode *code)
{
    /* Check requested format index is within range */
    if (index)
        return -EINVAL;
    *code = V4L2_MBUS_FMT_YUYV10_1X20;
    return 0;
}

/*
 * tvp7002_s_stream() - V4L2 decoder i/f handler for s_stream
 * @sd: pointer to standard V4L2 sub-device structure
 * @enable: streaming enable or disable
 *
 * Sets streaming to enable or disable, if possible.
 */
static int tvp7002_s_stream(struct v4l2_subdev *sd, int enable)
{
    struct tvp7002 *device = to_tvp7002(sd);
    int error = 0;

    if (device->streaming == enable)
        return 0;

    if (enable) {
        /* Set output state on (low impedance means stream on) */
        error = tvp7002_write(sd, TVP7002_MISC_CTL_2, 0x00);
        device->streaming = enable;
    } else {
        /* Set output state off (high impedance means stream off) */
        error = tvp7002_write(sd, TVP7002_MISC_CTL_2, 0x03);
        if (error)
            v4l2_dbg(1, debug, sd, "Unable to stop streaming\n");

        device->streaming = enable;
    }

    return error;
}

/*
 * tvp7002_log_status() - Print information about register settings
 * @sd: ptr to v4l2_subdev struct
 *
 * Log register values of a TVP7002 decoder device.
 * Returns zero or -EINVAL if read operation fails.
 */
static int tvp7002_log_status(struct v4l2_subdev *sd)
{
    const struct tvp7002_preset_definition *presets = tvp7002_presets;
    struct tvp7002 *device = to_tvp7002(sd);
    struct v4l2_dv_enum_preset e_preset;
    struct v4l2_dv_preset detected;
    int i;

    detected.preset = V4L2_DV_INVALID;
    /* Find my current standard*/
    tvp7002_query_dv_preset(sd, &detected);

    /* Print standard related code values */
    for (i = 0; i < NUM_PRESETS; i++, presets++)
        if (presets->preset == detected.preset)
            break;

    if (v4l_fill_dv_preset_info(device->current_preset->preset, &e_preset))
        return -EINVAL;

    v4l2_info(sd, "Selected DV Preset: %s\n", e_preset.name);
    v4l2_info(sd, "   Pixels per line: %u\n", e_preset.width);
    v4l2_info(sd, "   Lines per frame: %u\n\n", e_preset.height);
    if (i == NUM_PRESETS) {
        v4l2_info(sd, "Detected DV Preset: None\n");
    } else {
        if (v4l_fill_dv_preset_info(presets->preset, &e_preset))
            return -EINVAL;
        v4l2_info(sd, "Detected DV Preset: %s\n", e_preset.name);
        v4l2_info(sd, "  Pixels per line: %u\n", e_preset.width);
        v4l2_info(sd, "  Lines per frame: %u\n\n", e_preset.height);
    }
    v4l2_info(sd, "Streaming enabled: %s\n",
                    device->streaming ? "yes" : "no");

    /* Print the current value of the gain control */
    v4l2_ctrl_handler_log_status(&device->hdl, sd->name);

    return 0;
}

/*
 * tvp7002_enum_dv_presets() - Enum supported digital video formats
 * @sd: pointer to standard V4L2 sub-device structure
 * @preset: pointer to format struct
 *
 * Enumerate supported digital video formats.
 */
static int tvp7002_enum_dv_presets(struct v4l2_subdev *sd,
        struct v4l2_dv_enum_preset *preset)
{
    /* Check requested format index is within range */
    if (preset->index >= NUM_PRESETS)
        return -EINVAL;

    return v4l_fill_dv_preset_info(tvp7002_presets[preset->index].preset, preset);
}

static int tvp7002_enum_dv_timings(struct v4l2_subdev *sd,
        struct v4l2_enum_dv_timings *timings)
{
    /* Check requested format index is within range */
    if (timings->index >= NUM_PRESETS)
        return -EINVAL;

    timings->timings = tvp7002_presets[timings->index].timings;
    return 0;
}

static const struct v4l2_ctrl_ops tvp7002_ctrl_ops = {
    .s_ctrl = tvp7002_s_ctrl,
};

/* V4L2 core operation handlers */
static const struct v4l2_subdev_core_ops tvp7002_core_ops = {
    .g_chip_ident = tvp7002_g_chip_ident,
    .log_status = tvp7002_log_status,
    .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
    .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
    .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
    .g_ctrl = v4l2_subdev_g_ctrl,
    .s_ctrl = v4l2_subdev_s_ctrl,
    .queryctrl = v4l2_subdev_queryctrl,
    .querymenu = v4l2_subdev_querymenu,
#ifdef CONFIG_VIDEO_ADV_DEBUG
    .g_register = tvp7002_g_register,
    .s_register = tvp7002_s_register,
#endif
};

/* Specific video subsystem operation handlers */
static const struct v4l2_subdev_video_ops tvp7002_video_ops = {
    .enum_dv_presets = tvp7002_enum_dv_presets,
    .s_dv_preset = tvp7002_s_dv_preset,
    .query_dv_preset = tvp7002_query_dv_preset,
    .g_dv_timings = tvp7002_g_dv_timings,
    .s_dv_timings = tvp7002_s_dv_timings,
    .enum_dv_timings = tvp7002_enum_dv_timings,
    .query_dv_timings = tvp7002_query_dv_timings,
    .s_stream = tvp7002_s_stream,
    .g_mbus_fmt = tvp7002_mbus_fmt,
    .try_mbus_fmt = tvp7002_mbus_fmt,
    .s_mbus_fmt = tvp7002_mbus_fmt,
    .enum_mbus_fmt = tvp7002_enum_mbus_fmt,
};

/* V4L2 top level operation handlers */
static const struct v4l2_subdev_ops tvp7002_ops = {
    .core = &tvp7002_core_ops,
    .video = &tvp7002_video_ops,
};

/*
 * tvp7002_probe - Probe a TVP7002 device
 * @c: ptr to i2c_client struct
 * @id: ptr to i2c_device_id struct
 *
 * Initialize the TVP7002 device
 * Returns zero when successful, -EINVAL if register read fails or
 * -EIO if i2c access is not available.
 */
static int tvp7002_probe(struct i2c_client *c, const struct i2c_device_id *id)
{
    struct v4l2_subdev *sd;
    struct tvp7002 *device;
    struct v4l2_dv_preset preset;
    int polarity_a;
    int polarity_b;
    u8 revision;

    int error;

    /* Check if the adapter supports the needed features */
    if (!i2c_check_functionality(c->adapter,
        I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
        return -EIO;

    if (!c->dev.platform_data) {
        v4l_err(c, "No platform data!!\n");
        return -ENODEV;
    }

    device = kzalloc(sizeof(struct tvp7002), GFP_KERNEL);

    if (!device)
        return -ENOMEM;

    sd = &device->sd;
    device->pdata = c->dev.platform_data;
    device->current_preset = tvp7002_presets;

    /* Tell v4l2 the device is ready */
    v4l2_i2c_subdev_init(sd, c, &tvp7002_ops);
    v4l_info(c, "tvp7002 found @ 0x%02x (%s)\n",
                    c->addr, c->adapter->name);

    error = tvp7002_read(sd, TVP7002_CHIP_REV, &revision);
    if (error < 0)
        goto found_error;

    /* Get revision number */
    v4l2_info(sd, "Rev. %02x detected.\n", revision);
    if (revision != 0x02)
        v4l2_info(sd, "Unknown revision detected.\n");

    /* Initializes TVP7002 to its default values */
    error = tvp7002_write_inittab(sd, tvp7002_init_default);

    if (error < 0)
        goto found_error;

    /* Set polarity information after registers have been set */
    polarity_a = 0x20 | device->pdata->hs_polarity << 5
            | device->pdata->vs_polarity << 2;
    error = tvp7002_write(sd, TVP7002_SYNC_CTL_1, polarity_a);
    if (error < 0)
        goto found_error;

    polarity_b = 0x01  | device->pdata->fid_polarity << 2
            | device->pdata->sog_polarity << 1
            | device->pdata->clk_polarity;
    error = tvp7002_write(sd, TVP7002_MISC_CTL_3, polarity_b);
    if (error < 0)
        goto found_error;

    /* Set registers according to default video mode */
    preset.preset = device->current_preset->preset;
    error = tvp7002_s_dv_preset(sd, &preset);

    v4l2_ctrl_handler_init(&device->hdl, 1);
    v4l2_ctrl_new_std(&device->hdl, &tvp7002_ctrl_ops,
            V4L2_CID_GAIN, 0, 255, 1, 0);
    sd->ctrl_handler = &device->hdl;
    if (device->hdl.error) {
        int err = device->hdl.error;

        v4l2_ctrl_handler_free(&device->hdl);
        kfree(device);
        return err;
    }
    v4l2_ctrl_handler_setup(&device->hdl);

found_error:
    if (error < 0)
        kfree(device);

    return error;
}

/*
 * tvp7002_remove - Remove TVP7002 device support
 * @c: ptr to i2c_client struct
 *
 * Reset the TVP7002 device
 * Returns zero.
 */
static int tvp7002_remove(struct i2c_client *c)
{
    struct v4l2_subdev *sd = i2c_get_clientdata(c);
    struct tvp7002 *device = to_tvp7002(sd);

    v4l2_dbg(1, debug, sd, "Removing tvp7002 adapter"
                "on address 0x%x\n", c->addr);

    v4l2_device_unregister_subdev(sd);
    v4l2_ctrl_handler_free(&device->hdl);
    kfree(device);
    return 0;
}

/* I2C Device ID table */
static const struct i2c_device_id tvp7002_id[] = {
    { "tvp7002", 0 },
    { }
};
MODULE_DEVICE_TABLE(i2c, tvp7002_id);

/* I2C driver data */
static struct i2c_driver tvp7002_driver = {
    .driver = {
        .owner = THIS_MODULE,
        .name = TVP7002_MODULE_NAME,
    },
    .probe = tvp7002_probe,
    .remove = tvp7002_remove,
    .id_table = tvp7002_id,
};

module_i2c_driver(tvp7002_driver);