drivers/media/video/tvp7002.c

   1 /* Texas Instruments Triple 8-/10-BIT 165-/110-MSPS Video and Graphics
   2  * Digitizer with Horizontal PLL registers
   3  *
   4  * Copyright (C) 2009 Texas Instruments Inc
   5  * Author: Santiago Nunez-Corrales <santiago.nunez@ridgerun.com>
   6  *
   7  * This code is partially based upon the TVP5150 driver
   8  * written by Mauro Carvalho Chehab (mchehab@infradead.org),
   9  * the TVP514x driver written by Vaibhav Hiremath <hvaibhav@ti.com>
  10  * and the TVP7002 driver in the TI LSP 2.10.00.14. Revisions by
  11  * Muralidharan Karicheri and Snehaprabha Narnakaje (TI).
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27 #include <linux/delay.h>
  28 #include <linux/i2c.h>
  29 #include <linux/slab.h>
  30 #include <linux/videodev2.h>
  31 #include <linux/module.h>
  32 #include <media/tvp7002.h>
  33 #include <media/v4l2-device.h>
  34 #include <media/v4l2-chip-ident.h>
  35 #include <media/v4l2-common.h>
  36 #include <media/v4l2-ctrls.h>
  37 #include "tvp7002_reg.h"
  38
  39 MODULE_DESCRIPTION("TI TVP7002 Video and Graphics Digitizer driver");
  40 MODULE_AUTHOR("Santiago Nunez-Corrales <santiago.nunez@ridgerun.com>");
  41 MODULE_LICENSE("GPL");
  42
  43 /* Module Name */
  44 #define TVP7002_MODULE_NAME     "tvp7002"
  45
  46 /* I2C retry attempts */
  47 #define I2C_RETRY_COUNT         (5)
  48
  49 /* End of registers */
  50 #define TVP7002_EOR             0x5c
  51
  52 /* Read write definition for registers */
  53 #define TVP7002_READ            0
  54 #define TVP7002_WRITE           1
  55 #define TVP7002_RESERVED        2
  56
  57 /* Interlaced vs progressive mask and shift */
  58 #define TVP7002_IP_SHIFT        5
  59 #define TVP7002_INPR_MASK       (0x01 << TVP7002_IP_SHIFT)
  60
  61 /* Shift for CPL and LPF registers */
  62 #define TVP7002_CL_SHIFT        8
  63 #define TVP7002_CL_MASK         0x0f
  64
  65 /* Debug functions */
  66 static bool debug;
  67 module_param(debug, bool, 0644);
  68 MODULE_PARM_DESC(debug, "Debug level (0-2)");
  69
  70 /* Structure for register values */
  71 struct i2c_reg_value {
  72         u8 reg;
  73         u8 value;
  74         u8 type;
  75 };
  76
  77 /*
  78  * Register default values (according to tvp7002 datasheet)
  79  * In the case of read-only registers, the value (0xff) is
  80  * never written. R/W functionality is controlled by the
  81  * writable bit in the register struct definition.
  82  */
  83 static const struct i2c_reg_value tvp7002_init_default[] = {
  84         { TVP7002_CHIP_REV, 0xff, TVP7002_READ },
  85         { TVP7002_HPLL_FDBK_DIV_MSBS, 0x67, TVP7002_WRITE },
  86         { TVP7002_HPLL_FDBK_DIV_LSBS, 0x20, TVP7002_WRITE },
  87         { TVP7002_HPLL_CRTL, 0xa0, TVP7002_WRITE },
  88         { TVP7002_HPLL_PHASE_SEL, 0x80, TVP7002_WRITE },
  89         { TVP7002_CLAMP_START, 0x32, TVP7002_WRITE },
  90         { TVP7002_CLAMP_W, 0x20, TVP7002_WRITE },
  91         { TVP7002_HSYNC_OUT_W, 0x60, TVP7002_WRITE },
  92         { TVP7002_B_FINE_GAIN, 0x00, TVP7002_WRITE },
  93         { TVP7002_G_FINE_GAIN, 0x00, TVP7002_WRITE },
  94         { TVP7002_R_FINE_GAIN, 0x00, TVP7002_WRITE },
  95         { TVP7002_B_FINE_OFF_MSBS, 0x80, TVP7002_WRITE },
  96         { TVP7002_G_FINE_OFF_MSBS, 0x80, TVP7002_WRITE },
  97         { TVP7002_R_FINE_OFF_MSBS, 0x80, TVP7002_WRITE },
  98         { TVP7002_SYNC_CTL_1, 0x20, TVP7002_WRITE },
  99         { TVP7002_HPLL_AND_CLAMP_CTL, 0x2e, TVP7002_WRITE },
 100         { TVP7002_SYNC_ON_G_THRS, 0x5d, TVP7002_WRITE },
 101         { TVP7002_SYNC_SEPARATOR_THRS, 0x47, TVP7002_WRITE },
 102         { TVP7002_HPLL_PRE_COAST, 0x00, TVP7002_WRITE },
 103         { TVP7002_HPLL_POST_COAST, 0x00, TVP7002_WRITE },
 104         { TVP7002_SYNC_DETECT_STAT, 0xff, TVP7002_READ },
 105         { TVP7002_OUT_FORMATTER, 0x47, TVP7002_WRITE },
 106         { TVP7002_MISC_CTL_1, 0x01, TVP7002_WRITE },
 107         { TVP7002_MISC_CTL_2, 0x00, TVP7002_WRITE },
 108         { TVP7002_MISC_CTL_3, 0x01, TVP7002_WRITE },
 109         { TVP7002_IN_MUX_SEL_1, 0x00, TVP7002_WRITE },
 110         { TVP7002_IN_MUX_SEL_2, 0x67, TVP7002_WRITE },
 111         { TVP7002_B_AND_G_COARSE_GAIN, 0x77, TVP7002_WRITE },
 112         { TVP7002_R_COARSE_GAIN, 0x07, TVP7002_WRITE },
 113         { TVP7002_FINE_OFF_LSBS, 0x00, TVP7002_WRITE },
 114         { TVP7002_B_COARSE_OFF, 0x10, TVP7002_WRITE },
 115         { TVP7002_G_COARSE_OFF, 0x10, TVP7002_WRITE },
 116         { TVP7002_R_COARSE_OFF, 0x10, TVP7002_WRITE },
 117         { TVP7002_HSOUT_OUT_START, 0x08, TVP7002_WRITE },
 118         { TVP7002_MISC_CTL_4, 0x00, TVP7002_WRITE },
 119         { TVP7002_B_DGTL_ALC_OUT_LSBS, 0xff, TVP7002_READ },
 120         { TVP7002_G_DGTL_ALC_OUT_LSBS, 0xff, TVP7002_READ },
 121         { TVP7002_R_DGTL_ALC_OUT_LSBS, 0xff, TVP7002_READ },
 122         { TVP7002_AUTO_LVL_CTL_ENABLE, 0x80, TVP7002_WRITE },
 123         { TVP7002_DGTL_ALC_OUT_MSBS, 0xff, TVP7002_READ },
 124         { TVP7002_AUTO_LVL_CTL_FILTER, 0x53, TVP7002_WRITE },
 125         { 0x29, 0x08, TVP7002_RESERVED },
 126         { TVP7002_FINE_CLAMP_CTL, 0x07, TVP7002_WRITE },
 127         /* PWR_CTL is controlled only by the probe and reset functions */
 128         { TVP7002_PWR_CTL, 0x00, TVP7002_RESERVED },
 129         { TVP7002_ADC_SETUP, 0x50, TVP7002_WRITE },
 130         { TVP7002_COARSE_CLAMP_CTL, 0x00, TVP7002_WRITE },
 131         { TVP7002_SOG_CLAMP, 0x80, TVP7002_WRITE },
 132         { TVP7002_RGB_COARSE_CLAMP_CTL, 0x8c, TVP7002_WRITE },
 133         { TVP7002_SOG_COARSE_CLAMP_CTL, 0x04, TVP7002_WRITE },
 134         { TVP7002_ALC_PLACEMENT, 0x5a, TVP7002_WRITE },
 135         { 0x32, 0x18, TVP7002_RESERVED },
 136         { 0x33, 0x60, TVP7002_RESERVED },
 137         { TVP7002_MVIS_STRIPPER_W, 0xff, TVP7002_RESERVED },
 138         { TVP7002_VSYNC_ALGN, 0x10, TVP7002_WRITE },
 139         { TVP7002_SYNC_BYPASS, 0x00, TVP7002_WRITE },
 140         { TVP7002_L_FRAME_STAT_LSBS, 0xff, TVP7002_READ },
 141         { TVP7002_L_FRAME_STAT_MSBS, 0xff, TVP7002_READ },
 142         { TVP7002_CLK_L_STAT_LSBS, 0xff, TVP7002_READ },
 143         { TVP7002_CLK_L_STAT_MSBS, 0xff, TVP7002_READ },
 144         { TVP7002_HSYNC_W, 0xff, TVP7002_READ },
 145         { TVP7002_VSYNC_W, 0xff, TVP7002_READ },
 146         { TVP7002_L_LENGTH_TOL, 0x03, TVP7002_WRITE },
 147         { 0x3e, 0x60, TVP7002_RESERVED },
 148         { TVP7002_VIDEO_BWTH_CTL, 0x01, TVP7002_WRITE },
 149         { TVP7002_AVID_START_PIXEL_LSBS, 0x01, TVP7002_WRITE },
 150         { TVP7002_AVID_START_PIXEL_MSBS, 0x2c, TVP7002_WRITE },
 151         { TVP7002_AVID_STOP_PIXEL_LSBS, 0x06, TVP7002_WRITE },
 152         { TVP7002_AVID_STOP_PIXEL_MSBS, 0x2c, TVP7002_WRITE },
 153         { TVP7002_VBLK_F_0_START_L_OFF, 0x05, TVP7002_WRITE },
 154         { TVP7002_VBLK_F_1_START_L_OFF, 0x00, TVP7002_WRITE },
 155         { TVP7002_VBLK_F_0_DURATION, 0x1e, TVP7002_WRITE },
 156         { TVP7002_VBLK_F_1_DURATION, 0x00, TVP7002_WRITE },
 157         { TVP7002_FBIT_F_0_START_L_OFF, 0x00, TVP7002_WRITE },
 158         { TVP7002_FBIT_F_1_START_L_OFF, 0x00, TVP7002_WRITE },
 159         { TVP7002_YUV_Y_G_COEF_LSBS, 0xe3, TVP7002_WRITE },
 160         { TVP7002_YUV_Y_G_COEF_MSBS, 0x16, TVP7002_WRITE },
 161         { TVP7002_YUV_Y_B_COEF_LSBS, 0x4f, TVP7002_WRITE },
 162         { TVP7002_YUV_Y_B_COEF_MSBS, 0x02, TVP7002_WRITE },
 163         { TVP7002_YUV_Y_R_COEF_LSBS, 0xce, TVP7002_WRITE },
 164         { TVP7002_YUV_Y_R_COEF_MSBS, 0x06, TVP7002_WRITE },
 165         { TVP7002_YUV_U_G_COEF_LSBS, 0xab, TVP7002_WRITE },
 166         { TVP7002_YUV_U_G_COEF_MSBS, 0xf3, TVP7002_WRITE },
 167         { TVP7002_YUV_U_B_COEF_LSBS, 0x00, TVP7002_WRITE },
 168         { TVP7002_YUV_U_B_COEF_MSBS, 0x10, TVP7002_WRITE },
 169         { TVP7002_YUV_U_R_COEF_LSBS, 0x55, TVP7002_WRITE },
 170         { TVP7002_YUV_U_R_COEF_MSBS, 0xfc, TVP7002_WRITE },
 171         { TVP7002_YUV_V_G_COEF_LSBS, 0x78, TVP7002_WRITE },
 172         { TVP7002_YUV_V_G_COEF_MSBS, 0xf1, TVP7002_WRITE },
 173         { TVP7002_YUV_V_B_COEF_LSBS, 0x88, TVP7002_WRITE },
 174         { TVP7002_YUV_V_B_COEF_MSBS, 0xfe, TVP7002_WRITE },
 175         { TVP7002_YUV_V_R_COEF_LSBS, 0x00, TVP7002_WRITE },
 176         { TVP7002_YUV_V_R_COEF_MSBS, 0x10, TVP7002_WRITE },
 177         /* This signals end of register values */
 178         { TVP7002_EOR, 0xff, TVP7002_RESERVED }
 179 };
 180
 181 /* Register parameters for 480P */
 182 static const struct i2c_reg_value tvp7002_parms_480P[] = {
 183         { TVP7002_HPLL_FDBK_DIV_MSBS, 0x35, TVP7002_WRITE },
 184         { TVP7002_HPLL_FDBK_DIV_LSBS, 0xa0, TVP7002_WRITE },
 185         { TVP7002_HPLL_CRTL, 0x02, TVP7002_WRITE },
 186         { TVP7002_AVID_START_PIXEL_LSBS, 0x91, TVP7002_WRITE },
 187         { TVP7002_AVID_START_PIXEL_MSBS, 0x00, TVP7002_WRITE },
 188         { TVP7002_AVID_STOP_PIXEL_LSBS, 0x0B, TVP7002_WRITE },
 189         { TVP7002_AVID_STOP_PIXEL_MSBS, 0x00, TVP7002_WRITE },
 190         { TVP7002_VBLK_F_0_START_L_OFF, 0x03, TVP7002_WRITE },
 191         { TVP7002_VBLK_F_1_START_L_OFF, 0x01, TVP7002_WRITE },
 192         { TVP7002_VBLK_F_0_DURATION, 0x13, TVP7002_WRITE },
 193         { TVP7002_VBLK_F_1_DURATION, 0x13, TVP7002_WRITE },
 194         { TVP7002_ALC_PLACEMENT, 0x18, TVP7002_WRITE },
 195         { TVP7002_CLAMP_START, 0x06, TVP7002_WRITE },
 196         { TVP7002_CLAMP_W, 0x10, TVP7002_WRITE },
 197         { TVP7002_HPLL_PRE_COAST, 0x03, TVP7002_WRITE },
 198         { TVP7002_HPLL_POST_COAST, 0x03, TVP7002_WRITE },
 199         { TVP7002_EOR, 0xff, TVP7002_RESERVED }
 200 };
 201
 202 /* Register parameters for 576P */
 203 static const struct i2c_reg_value tvp7002_parms_576P[] = {
 204         { TVP7002_HPLL_FDBK_DIV_MSBS, 0x36, TVP7002_WRITE },
 205         { TVP7002_HPLL_FDBK_DIV_LSBS, 0x00, TVP7002_WRITE },
 206         { TVP7002_HPLL_CRTL, 0x18, TVP7002_WRITE },
 207         { TVP7002_AVID_START_PIXEL_LSBS, 0x9B, TVP7002_WRITE },
 208         { TVP7002_AVID_START_PIXEL_MSBS, 0x00, TVP7002_WRITE },
 209         { TVP7002_AVID_STOP_PIXEL_LSBS, 0x0F, TVP7002_WRITE },
 210         { TVP7002_AVID_STOP_PIXEL_MSBS, 0x00, TVP7002_WRITE },
 211         { TVP7002_VBLK_F_0_START_L_OFF, 0x00, TVP7002_WRITE },
 212         { TVP7002_VBLK_F_1_START_L_OFF, 0x00, TVP7002_WRITE },
 213         { TVP7002_VBLK_F_0_DURATION, 0x2D, TVP7002_WRITE },
 214         { TVP7002_VBLK_F_1_DURATION, 0x00, TVP7002_WRITE },
 215         { TVP7002_ALC_PLACEMENT, 0x18, TVP7002_WRITE },
 216         { TVP7002_CLAMP_START, 0x06, TVP7002_WRITE },
 217         { TVP7002_CLAMP_W, 0x10, TVP7002_WRITE },
 218         { TVP7002_HPLL_PRE_COAST, 0x03, TVP7002_WRITE },
 219         { TVP7002_HPLL_POST_COAST, 0x03, TVP7002_WRITE },
 220         { TVP7002_EOR, 0xff, TVP7002_RESERVED }
 221 };
 222
 223 /* Register parameters for 1080I60 */
 224 static const struct i2c_reg_value tvp7002_parms_1080I60[] = {
 225         { TVP7002_HPLL_FDBK_DIV_MSBS, 0x89, TVP7002_WRITE },
 226         { TVP7002_HPLL_FDBK_DIV_LSBS, 0x80, TVP7002_WRITE },
 227         { TVP7002_HPLL_CRTL, 0x98, TVP7002_WRITE },
 228         { TVP7002_AVID_START_PIXEL_LSBS, 0x06, TVP7002_WRITE },
 229         { TVP7002_AVID_START_PIXEL_MSBS, 0x01, TVP7002_WRITE },
 230         { TVP7002_AVID_STOP_PIXEL_LSBS, 0x8a, TVP7002_WRITE },
 231         { TVP7002_AVID_STOP_PIXEL_MSBS, 0x08, TVP7002_WRITE },
 232         { TVP7002_VBLK_F_0_START_L_OFF, 0x02, TVP7002_WRITE },
 233         { TVP7002_VBLK_F_1_START_L_OFF, 0x02, TVP7002_WRITE },
 234         { TVP7002_VBLK_F_0_DURATION, 0x16, TVP7002_WRITE },
 235         { TVP7002_VBLK_F_1_DURATION, 0x17, TVP7002_WRITE },
 236         { TVP7002_ALC_PLACEMENT, 0x5a, TVP7002_WRITE },
 237         { TVP7002_CLAMP_START, 0x32, TVP7002_WRITE },
 238         { TVP7002_CLAMP_W, 0x20, TVP7002_WRITE },
 239         { TVP7002_HPLL_PRE_COAST, 0x01, TVP7002_WRITE },
 240         { TVP7002_HPLL_POST_COAST, 0x00, TVP7002_WRITE },
 241         { TVP7002_EOR, 0xff, TVP7002_RESERVED }
 242 };
 243
 244 /* Register parameters for 1080P60 */
 245 static const struct i2c_reg_value tvp7002_parms_1080P60[] = {
 246         { TVP7002_HPLL_FDBK_DIV_MSBS, 0x89, TVP7002_WRITE },
 247         { TVP7002_HPLL_FDBK_DIV_LSBS, 0x80, TVP7002_WRITE },
 248         { TVP7002_HPLL_CRTL, 0xE0, TVP7002_WRITE },
 249         { TVP7002_AVID_START_PIXEL_LSBS, 0x06, TVP7002_WRITE },
 250         { TVP7002_AVID_START_PIXEL_MSBS, 0x01, TVP7002_WRITE },
 251         { TVP7002_AVID_STOP_PIXEL_LSBS, 0x8a, TVP7002_WRITE },
 252         { TVP7002_AVID_STOP_PIXEL_MSBS, 0x08, TVP7002_WRITE },
 253         { TVP7002_VBLK_F_0_START_L_OFF, 0x02, TVP7002_WRITE },
 254         { TVP7002_VBLK_F_1_START_L_OFF, 0x02, TVP7002_WRITE },
 255         { TVP7002_VBLK_F_0_DURATION, 0x16, TVP7002_WRITE },
 256         { TVP7002_VBLK_F_1_DURATION, 0x17, TVP7002_WRITE },
 257         { TVP7002_ALC_PLACEMENT, 0x5a, TVP7002_WRITE },
 258         { TVP7002_CLAMP_START, 0x32, TVP7002_WRITE },
 259         { TVP7002_CLAMP_W, 0x20, TVP7002_WRITE },
 260         { TVP7002_HPLL_PRE_COAST, 0x01, TVP7002_WRITE },
 261         { TVP7002_HPLL_POST_COAST, 0x00, TVP7002_WRITE },
 262         { TVP7002_EOR, 0xff, TVP7002_RESERVED }
 263 };
 264
 265 /* Register parameters for 1080I50 */
 266 static const struct i2c_reg_value tvp7002_parms_1080I50[] = {
 267         { TVP7002_HPLL_FDBK_DIV_MSBS, 0xa5, TVP7002_WRITE },
 268         { TVP7002_HPLL_FDBK_DIV_LSBS, 0x00, TVP7002_WRITE },
 269         { TVP7002_HPLL_CRTL, 0x98, TVP7002_WRITE },
 270         { TVP7002_AVID_START_PIXEL_LSBS, 0x06, TVP7002_WRITE },
 271         { TVP7002_AVID_START_PIXEL_MSBS, 0x01, TVP7002_WRITE },
 272         { TVP7002_AVID_STOP_PIXEL_LSBS, 0x8a, TVP7002_WRITE },
 273         { TVP7002_AVID_STOP_PIXEL_MSBS, 0x08, TVP7002_WRITE },
 274         { TVP7002_VBLK_F_0_START_L_OFF, 0x02, TVP7002_WRITE },
 275         { TVP7002_VBLK_F_1_START_L_OFF, 0x02, TVP7002_WRITE },
 276         { TVP7002_VBLK_F_0_DURATION, 0x16, TVP7002_WRITE },
 277         { TVP7002_VBLK_F_1_DURATION, 0x17, TVP7002_WRITE },
 278         { TVP7002_ALC_PLACEMENT, 0x5a, TVP7002_WRITE },
 279         { TVP7002_CLAMP_START, 0x32, TVP7002_WRITE },
 280         { TVP7002_CLAMP_W, 0x20, TVP7002_WRITE },
 281         { TVP7002_HPLL_PRE_COAST, 0x01, TVP7002_WRITE },
 282         { TVP7002_HPLL_POST_COAST, 0x00, TVP7002_WRITE },
 283         { TVP7002_EOR, 0xff, TVP7002_RESERVED }
 284 };
 285
 286 /* Register parameters for 720P60 */
 287 static const struct i2c_reg_value tvp7002_parms_720P60[] = {
 288         { TVP7002_HPLL_FDBK_DIV_MSBS, 0x67, TVP7002_WRITE },
 289         { TVP7002_HPLL_FDBK_DIV_LSBS, 0x20, TVP7002_WRITE },
 290         { TVP7002_HPLL_CRTL, 0xa0, TVP7002_WRITE },
 291         { TVP7002_AVID_START_PIXEL_LSBS, 0x47, TVP7002_WRITE },
 292         { TVP7002_AVID_START_PIXEL_MSBS, 0x01, TVP7002_WRITE },
 293         { TVP7002_AVID_STOP_PIXEL_LSBS, 0x4B, TVP7002_WRITE },
 294         { TVP7002_AVID_STOP_PIXEL_MSBS, 0x06, TVP7002_WRITE },
 295         { TVP7002_VBLK_F_0_START_L_OFF, 0x05, TVP7002_WRITE },
 296         { TVP7002_VBLK_F_1_START_L_OFF, 0x00, TVP7002_WRITE },
 297         { TVP7002_VBLK_F_0_DURATION, 0x2D, TVP7002_WRITE },
 298         { TVP7002_VBLK_F_1_DURATION, 0x00, TVP7002_WRITE },
 299         { TVP7002_ALC_PLACEMENT, 0x5a, TVP7002_WRITE },
 300         { TVP7002_CLAMP_START, 0x32, TVP7002_WRITE },
 301         { TVP7002_CLAMP_W, 0x20, TVP7002_WRITE },
 302         { TVP7002_HPLL_PRE_COAST, 0x00, TVP7002_WRITE },
 303         { TVP7002_HPLL_POST_COAST, 0x00, TVP7002_WRITE },
 304         { TVP7002_EOR, 0xff, TVP7002_RESERVED }
 305 };
 306
 307 /* Register parameters for 720P50 */
 308 static const struct i2c_reg_value tvp7002_parms_720P50[] = {
 309         { TVP7002_HPLL_FDBK_DIV_MSBS, 0x7b, TVP7002_WRITE },
 310         { TVP7002_HPLL_FDBK_DIV_LSBS, 0xc0, TVP7002_WRITE },
 311         { TVP7002_HPLL_CRTL, 0x98, TVP7002_WRITE },
 312         { TVP7002_AVID_START_PIXEL_LSBS, 0x47, TVP7002_WRITE },
 313         { TVP7002_AVID_START_PIXEL_MSBS, 0x01, TVP7002_WRITE },
 314         { TVP7002_AVID_STOP_PIXEL_LSBS, 0x4B, TVP7002_WRITE },
 315         { TVP7002_AVID_STOP_PIXEL_MSBS, 0x06, TVP7002_WRITE },
 316         { TVP7002_VBLK_F_0_START_L_OFF, 0x05, TVP7002_WRITE },
 317         { TVP7002_VBLK_F_1_START_L_OFF, 0x00, TVP7002_WRITE },
 318         { TVP7002_VBLK_F_0_DURATION, 0x2D, TVP7002_WRITE },
 319         { TVP7002_VBLK_F_1_DURATION, 0x00, TVP7002_WRITE },
 320         { TVP7002_ALC_PLACEMENT, 0x5a, TVP7002_WRITE },
 321         { TVP7002_CLAMP_START, 0x32, TVP7002_WRITE },
 322         { TVP7002_CLAMP_W, 0x20, TVP7002_WRITE },
 323         { TVP7002_HPLL_PRE_COAST, 0x01, TVP7002_WRITE },
 324         { TVP7002_HPLL_POST_COAST, 0x00, TVP7002_WRITE },
 325         { TVP7002_EOR, 0xff, TVP7002_RESERVED }
 326 };
 327
 328 /* Preset definition for handling device operation */
 329 struct tvp7002_preset_definition {
 330         u32 preset;
 331         const struct i2c_reg_value *p_settings;
 332         enum v4l2_colorspace color_space;
 333         enum v4l2_field scanmode;
 334         u16 progressive;
 335         u16 lines_per_frame;
 336         u16 cpl_min;
 337         u16 cpl_max;
 338 };
 339
 340 /* Struct list for digital video presets */
 341 static const struct tvp7002_preset_definition tvp7002_presets[] = {
 342         {
 343                 V4L2_DV_720P60,
 344                 tvp7002_parms_720P60,
 345                 V4L2_COLORSPACE_REC709,
 346                 V4L2_FIELD_NONE,
 347                 1,
 348                 0x2EE,
 349                 135,
 350                 153
 351         },
 352         {
 353                 V4L2_DV_1080I60,
 354                 tvp7002_parms_1080I60,
 355                 V4L2_COLORSPACE_REC709,
 356                 V4L2_FIELD_INTERLACED,
 357                 0,
 358                 0x465,
 359                 181,
 360                 205
 361         },
 362         {
 363                 V4L2_DV_1080I50,
 364                 tvp7002_parms_1080I50,
 365                 V4L2_COLORSPACE_REC709,
 366                 V4L2_FIELD_INTERLACED,
 367                 0,
 368                 0x465,
 369                 217,
 370                 245
 371         },
 372         {
 373                 V4L2_DV_720P50,
 374                 tvp7002_parms_720P50,
 375                 V4L2_COLORSPACE_REC709,
 376                 V4L2_FIELD_NONE,
 377                 1,
 378                 0x2EE,
 379                 163,
 380                 183
 381         },
 382         {
 383                 V4L2_DV_1080P60,
 384                 tvp7002_parms_1080P60,
 385                 V4L2_COLORSPACE_REC709,
 386                 V4L2_FIELD_NONE,
 387                 1,
 388                 0x465,
 389                 90,
 390                 102
 391         },
 392         {
 393                 V4L2_DV_480P59_94,
 394                 tvp7002_parms_480P,
 395                 V4L2_COLORSPACE_SMPTE170M,
 396                 V4L2_FIELD_NONE,
 397                 1,
 398                 0x20D,
 399                 0xffff,
 400                 0xffff
 401         },
 402         {
 403                 V4L2_DV_576P50,
 404                 tvp7002_parms_576P,
 405                 V4L2_COLORSPACE_SMPTE170M,
 406                 V4L2_FIELD_NONE,
 407                 1,
 408                 0x271,
 409                 0xffff,
 410                 0xffff
 411         }
 412 };
 413
 414 #define NUM_PRESETS     ARRAY_SIZE(tvp7002_presets)
 415
 416 /* Device definition */
 417 struct tvp7002 {
 418         struct v4l2_subdev sd;
 419         struct v4l2_ctrl_handler hdl;
 420         const struct tvp7002_config *pdata;
 421
 422         int ver;
 423         int streaming;
 424
 425         const struct tvp7002_preset_definition *current_preset;
 426 };
 427
 428 /*
 429  * to_tvp7002 - Obtain device handler TVP7002
 430  * @sd: ptr to v4l2_subdev struct
 431  *
 432  * Returns device handler tvp7002.
 433  */
 434 static inline struct tvp7002 *to_tvp7002(struct v4l2_subdev *sd)
 435 {
 436         return container_of(sd, struct tvp7002, sd);
 437 }
 438
 439 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
 440 {
 441         return &container_of(ctrl->handler, struct tvp7002, hdl)->sd;
 442 }
 443
 444 /*
 445  * tvp7002_read - Read a value from a register in an TVP7002
 446  * @sd: ptr to v4l2_subdev struct
 447  * @addr: TVP7002 register address
 448  * @dst: pointer to 8-bit destination
 449  *
 450  * Returns value read if successful, or non-zero (-1) otherwise.
 451  */
 452 static int tvp7002_read(struct v4l2_subdev *sd, u8 addr, u8 *dst)
 453 {
 454         struct i2c_client *c = v4l2_get_subdevdata(sd);
 455         int retry;
 456         int error;
 457
 458         for (retry = 0; retry < I2C_RETRY_COUNT; retry++) {
 459                 error = i2c_smbus_read_byte_data(c, addr);
 460
 461                 if (error >= 0) {
 462                         *dst = (u8)error;
 463                         return 0;
 464                 }
 465
 466                 msleep_interruptible(10);
 467         }
 468         v4l2_err(sd, "TVP7002 read error %d\n", error);
 469         return error;
 470 }
 471
 472 /*
 473  * tvp7002_read_err() - Read a register value with error code
 474  * @sd: pointer to standard V4L2 sub-device structure
 475  * @reg: destination register
 476  * @val: value to be read
 477  * @err: pointer to error value
 478  *
 479  * Read a value in a register and save error value in pointer.
 480  * Also update the register table if successful
 481  */
 482 static inline void tvp7002_read_err(struct v4l2_subdev *sd, u8 reg,
 483                                                         u8 *dst, int *err)
 484 {
 485         if (!*err)
 486                 *err = tvp7002_read(sd, reg, dst);
 487 }
 488
 489 /*
 490  * tvp7002_write() - Write a value to a register in TVP7002
 491  * @sd: ptr to v4l2_subdev struct
 492  * @addr: TVP7002 register address
 493  * @value: value to be written to the register
 494  *
 495  * Write a value to a register in an TVP7002 decoder device.
 496  * Returns zero if successful, or non-zero otherwise.
 497  */
 498 static int tvp7002_write(struct v4l2_subdev *sd, u8 addr, u8 value)
 499 {
 500         struct i2c_client *c;
 501         int retry;
 502         int error;
 503
 504         c = v4l2_get_subdevdata(sd);
 505
 506         for (retry = 0; retry < I2C_RETRY_COUNT; retry++) {
 507                 error = i2c_smbus_write_byte_data(c, addr, value);
 508
 509                 if (error >= 0)
 510                         return 0;
 511
 512                 v4l2_warn(sd, "Write: retry ... %d\n", retry);
 513                 msleep_interruptible(10);
 514         }
 515         v4l2_err(sd, "TVP7002 write error %d\n", error);
 516         return error;
 517 }
 518
 519 /*
 520  * tvp7002_write_err() - Write a register value with error code
 521  * @sd: pointer to standard V4L2 sub-device structure
 522  * @reg: destination register
 523  * @val: value to be written
 524  * @err: pointer to error value
 525  *
 526  * Write a value in a register and save error value in pointer.
 527  * Also update the register table if successful
 528  */
 529 static inline void tvp7002_write_err(struct v4l2_subdev *sd, u8 reg,
 530                                                         u8 val, int *err)
 531 {
 532         if (!*err)
 533                 *err = tvp7002_write(sd, reg, val);
 534 }
 535
 536 /*
 537  * tvp7002_g_chip_ident() - Get chip identification number
 538  * @sd: ptr to v4l2_subdev struct
 539  * @chip: ptr to v4l2_dbg_chip_ident struct
 540  *
 541  * Obtains the chip's identification number.
 542  * Returns zero or -EINVAL if read operation fails.
 543  */
 544 static int tvp7002_g_chip_ident(struct v4l2_subdev *sd,
 545                                         struct v4l2_dbg_chip_ident *chip)
 546 {
 547         u8 rev;
 548         int error;
 549         struct i2c_client *client = v4l2_get_subdevdata(sd);
 550
 551         error = tvp7002_read(sd, TVP7002_CHIP_REV, &rev);
 552
 553         if (error < 0)
 554                 return error;
 555
 556         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_TVP7002, rev);
 557 }
 558
 559 /*
 560  * tvp7002_write_inittab() - Write initialization values
 561  * @sd: ptr to v4l2_subdev struct
 562  * @regs: ptr to i2c_reg_value struct
 563  *
 564  * Write initialization values.
 565  * Returns zero or -EINVAL if read operation fails.
 566  */
 567 static int tvp7002_write_inittab(struct v4l2_subdev *sd,
 568                                         const struct i2c_reg_value *regs)
 569 {
 570         int error = 0;
 571
 572         /* Initialize the first (defined) registers */
 573         while (TVP7002_EOR != regs->reg) {
 574                 if (TVP7002_WRITE == regs->type)
 575                         tvp7002_write_err(sd, regs->reg, regs->value, &error);
 576                 regs++;
 577         }
 578
 579         return error;
 580 }
 581
 582 /*
 583  * tvp7002_s_dv_preset() - Set digital video preset
 584  * @sd: ptr to v4l2_subdev struct
 585  * @dv_preset: ptr to v4l2_dv_preset struct
 586  *
 587  * Set the digital video preset for a TVP7002 decoder device.
 588  * Returns zero when successful or -EINVAL if register access fails.
 589  */
 590 static int tvp7002_s_dv_preset(struct v4l2_subdev *sd,
 591                                         struct v4l2_dv_preset *dv_preset)
 592 {
 593         struct tvp7002 *device = to_tvp7002(sd);
 594         u32 preset;
 595         int i;
 596
 597         for (i = 0; i < NUM_PRESETS; i++) {
 598                 preset = tvp7002_presets[i].preset;
 599                 if (preset == dv_preset->preset) {
 600                         device->current_preset = &tvp7002_presets[i];
 601                         return tvp7002_write_inittab(sd, tvp7002_presets[i].p_settings);
 602                 }
 603         }
 604
 605         return -EINVAL;
 606 }
 607
 608 /*
 609  * tvp7002_s_ctrl() - Set a control
 610  * @ctrl: ptr to v4l2_ctrl struct
 611  *
 612  * Set a control in TVP7002 decoder device.
 613  * Returns zero when successful or -EINVAL if register access fails.
 614  */
 615 static int tvp7002_s_ctrl(struct v4l2_ctrl *ctrl)
 616 {
 617         struct v4l2_subdev *sd = to_sd(ctrl);
 618         int error = 0;
 619
 620         switch (ctrl->id) {
 621         case V4L2_CID_GAIN:
 622                 tvp7002_write_err(sd, TVP7002_R_FINE_GAIN, ctrl->val, &error);
 623                 tvp7002_write_err(sd, TVP7002_G_FINE_GAIN, ctrl->val, &error);
 624                 tvp7002_write_err(sd, TVP7002_B_FINE_GAIN, ctrl->val, &error);
 625                 return error;
 626         }
 627         return -EINVAL;
 628 }
 629
 630 /*
 631  * tvp7002_mbus_fmt() - V4L2 decoder interface handler for try/s/g_mbus_fmt
 632  * @sd: pointer to standard V4L2 sub-device structure
 633  * @f: pointer to mediabus format structure
 634  *
 635  * Negotiate the image capture size and mediabus format.
 636  * There is only one possible format, so this single function works for
 637  * get, set and try.
 638  */
 639 static int tvp7002_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *f)
 640 {
 641         struct tvp7002 *device = to_tvp7002(sd);
 642         struct v4l2_dv_enum_preset e_preset;
 643         int error;
 644
 645         /* Calculate height and width based on current standard */
 646         error = v4l_fill_dv_preset_info(device->current_preset->preset, &e_preset);
 647         if (error)
 648                 return error;
 649
 650         f->width = e_preset.width;
 651         f->height = e_preset.height;
 652         f->code = V4L2_MBUS_FMT_YUYV10_1X20;
 653         f->field = device->current_preset->scanmode;
 654         f->colorspace = device->current_preset->color_space;
 655
 656         v4l2_dbg(1, debug, sd, "MBUS_FMT: Width - %d, Height - %d",
 657                         f->width, f->height);
 658         return 0;
 659 }
 660
 661 /*
 662  * tvp7002_query_dv_preset() - query DV preset
 663  * @sd: pointer to standard V4L2 sub-device structure
 664  * @qpreset: standard V4L2 v4l2_dv_preset structure
 665  *
 666  * Returns the current DV preset by TVP7002. If no active input is
 667  * detected, returns -EINVAL
 668  */
 669 static int tvp7002_query_dv_preset(struct v4l2_subdev *sd,
 670                                                 struct v4l2_dv_preset *qpreset)
 671 {
 672         const struct tvp7002_preset_definition *presets = tvp7002_presets;
 673         struct tvp7002 *device;
 674         u8 progressive;
 675         u32 lpfr;
 676         u32 cpln;
 677         int error = 0;
 678         u8 lpf_lsb;
 679         u8 lpf_msb;
 680         u8 cpl_lsb;
 681         u8 cpl_msb;
 682         int index;
 683
 684         /* Return invalid preset if no active input is detected */
 685         qpreset->preset = V4L2_DV_INVALID;
 686
 687         device = to_tvp7002(sd);
 688
 689         /* Read standards from device registers */
 690         tvp7002_read_err(sd, TVP7002_L_FRAME_STAT_LSBS, &lpf_lsb, &error);
 691         tvp7002_read_err(sd, TVP7002_L_FRAME_STAT_MSBS, &lpf_msb, &error);
 692
 693         if (error < 0)
 694                 return error;
 695
 696         tvp7002_read_err(sd, TVP7002_CLK_L_STAT_LSBS, &cpl_lsb, &error);
 697         tvp7002_read_err(sd, TVP7002_CLK_L_STAT_MSBS, &cpl_msb, &error);
 698
 699         if (error < 0)
 700                 return error;
 701
 702         /* Get lines per frame, clocks per line and interlaced/progresive */
 703         lpfr = lpf_lsb | ((TVP7002_CL_MASK & lpf_msb) << TVP7002_CL_SHIFT);
 704         cpln = cpl_lsb | ((TVP7002_CL_MASK & cpl_msb) << TVP7002_CL_SHIFT);
 705         progressive = (lpf_msb & TVP7002_INPR_MASK) >> TVP7002_IP_SHIFT;
 706
 707         /* Do checking of video modes */
 708         for (index = 0; index < NUM_PRESETS; index++, presets++)
 709                 if (lpfr  == presets->lines_per_frame &&
 710                         progressive == presets->progressive) {
 711                         if (presets->cpl_min == 0xffff)
 712                                 break;
 713                         if (cpln >= presets->cpl_min && cpln <= presets->cpl_max)
 714                                 break;
 715                 }
 716
 717         if (index == NUM_PRESETS) {
 718                 v4l2_dbg(1, debug, sd, "detection failed: lpf = %x, cpl = %x\n",
 719                                                                 lpfr, cpln);
 720                 return 0;
 721         }
 722
 723         /* Set values in found preset */
 724         qpreset->preset = presets->preset;
 725
 726         /* Update lines per frame and clocks per line info */
 727         v4l2_dbg(1, debug, sd, "detected preset: %d\n", presets->preset);
 728         return 0;
 729 }
 730
 731 #ifdef CONFIG_VIDEO_ADV_DEBUG
 732 /*
 733  * tvp7002_g_register() - Get the value of a register
 734  * @sd: ptr to v4l2_subdev struct
 735  * @reg: ptr to v4l2_dbg_register struct
 736  *
 737  * Get the value of a TVP7002 decoder device register.
 738  * Returns zero when successful, -EINVAL if register read fails or
 739  * access to I2C client fails, -EPERM if the call is not allowed
 740  * by disabled CAP_SYS_ADMIN.
 741  */
 742 static int tvp7002_g_register(struct v4l2_subdev *sd,
 743                                                 struct v4l2_dbg_register *reg)
 744 {
 745         struct i2c_client *client = v4l2_get_subdevdata(sd);
 746         u8 val;
 747         int ret;
 748
 749         if (!v4l2_chip_match_i2c_client(client, &reg->match))
 750                 return -EINVAL;
 751         if (!capable(CAP_SYS_ADMIN))
 752                 return -EPERM;
 753
 754         ret = tvp7002_read(sd, reg->reg & 0xff, &val);
 755         reg->val = val;
 756         return ret;
 757 }
 758
 759 /*
 760  * tvp7002_s_register() - set a control
 761  * @sd: ptr to v4l2_subdev struct
 762  * @reg: ptr to v4l2_dbg_register struct
 763  *
 764  * Get the value of a TVP7002 decoder device register.
 765  * Returns zero when successful, -EINVAL if register read fails or
 766  * -EPERM if call not allowed.
 767  */
 768 static int tvp7002_s_register(struct v4l2_subdev *sd,
 769                                                 struct v4l2_dbg_register *reg)
 770 {
 771         struct i2c_client *client = v4l2_get_subdevdata(sd);
 772
 773         if (!v4l2_chip_match_i2c_client(client, &reg->match))
 774                 return -EINVAL;
 775         if (!capable(CAP_SYS_ADMIN))
 776                 return -EPERM;
 777
 778         return tvp7002_write(sd, reg->reg & 0xff, reg->val & 0xff);
 779 }
 780 #endif
 781
 782 /*
 783  * tvp7002_enum_mbus_fmt() - Enum supported mediabus formats
 784  * @sd: pointer to standard V4L2 sub-device structure
 785  * @index: format index
 786  * @code: pointer to mediabus format
 787  *
 788  * Enumerate supported mediabus formats.
 789  */
 790
 791 static int tvp7002_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned index,
 792                                         enum v4l2_mbus_pixelcode *code)
 793 {
 794         /* Check requested format index is within range */
 795         if (index)
 796                 return -EINVAL;
 797         *code = V4L2_MBUS_FMT_YUYV10_1X20;
 798         return 0;
 799 }
 800
 801 /*
 802  * tvp7002_s_stream() - V4L2 decoder i/f handler for s_stream
 803  * @sd: pointer to standard V4L2 sub-device structure
 804  * @enable: streaming enable or disable
 805  *
 806  * Sets streaming to enable or disable, if possible.
 807  */
 808 static int tvp7002_s_stream(struct v4l2_subdev *sd, int enable)
 809 {
 810         struct tvp7002 *device = to_tvp7002(sd);
 811         int error = 0;
 812
 813         if (device->streaming == enable)
 814                 return 0;
 815
 816         if (enable) {
 817                 /* Set output state on (low impedance means stream on) */
 818                 error = tvp7002_write(sd, TVP7002_MISC_CTL_2, 0x00);
 819                 device->streaming = enable;
 820         } else {
 821                 /* Set output state off (high impedance means stream off) */
 822                 error = tvp7002_write(sd, TVP7002_MISC_CTL_2, 0x03);
 823                 if (error)
 824                         v4l2_dbg(1, debug, sd, "Unable to stop streaming\n");
 825
 826                 device->streaming = enable;
 827         }
 828
 829         return error;
 830 }
 831
 832 /*
 833  * tvp7002_log_status() - Print information about register settings
 834  * @sd: ptr to v4l2_subdev struct
 835  *
 836  * Log register values of a TVP7002 decoder device.
 837  * Returns zero or -EINVAL if read operation fails.
 838  */
 839 static int tvp7002_log_status(struct v4l2_subdev *sd)
 840 {
 841         const struct tvp7002_preset_definition *presets = tvp7002_presets;
 842         struct tvp7002 *device = to_tvp7002(sd);
 843         struct v4l2_dv_enum_preset e_preset;
 844         struct v4l2_dv_preset detected;
 845         int i;
 846
 847         detected.preset = V4L2_DV_INVALID;
 848         /* Find my current standard*/
 849         tvp7002_query_dv_preset(sd, &detected);
 850
 851         /* Print standard related code values */
 852         for (i = 0; i < NUM_PRESETS; i++, presets++)
 853                 if (presets->preset == detected.preset)
 854                         break;
 855
 856         if (v4l_fill_dv_preset_info(device->current_preset->preset, &e_preset))
 857                 return -EINVAL;
 858
 859         v4l2_info(sd, "Selected DV Preset: %s\n", e_preset.name);
 860         v4l2_info(sd, "   Pixels per line: %u\n", e_preset.width);
 861         v4l2_info(sd, "   Lines per frame: %u\n\n", e_preset.height);
 862         if (i == NUM_PRESETS) {
 863                 v4l2_info(sd, "Detected DV Preset: None\n");
 864         } else {
 865                 if (v4l_fill_dv_preset_info(presets->preset, &e_preset))
 866                         return -EINVAL;
 867                 v4l2_info(sd, "Detected DV Preset: %s\n", e_preset.name);
 868                 v4l2_info(sd, "  Pixels per line: %u\n", e_preset.width);
 869                 v4l2_info(sd, "  Lines per frame: %u\n\n", e_preset.height);
 870         }
 871         v4l2_info(sd, "Streaming enabled: %s\n",
 872                                         device->streaming ? "yes" : "no");
 873
 874         /* Print the current value of the gain control */
 875         v4l2_ctrl_handler_log_status(&device->hdl, sd->name);
 876
 877         return 0;
 878 }
 879
 880 /*
 881  * tvp7002_enum_dv_presets() - Enum supported digital video formats
 882  * @sd: pointer to standard V4L2 sub-device structure
 883  * @preset: pointer to format struct
 884  *
 885  * Enumerate supported digital video formats.
 886  */
 887 static int tvp7002_enum_dv_presets(struct v4l2_subdev *sd,
 888                 struct v4l2_dv_enum_preset *preset)
 889 {
 890         /* Check requested format index is within range */
 891         if (preset->index >= NUM_PRESETS)
 892                 return -EINVAL;
 893
 894         return v4l_fill_dv_preset_info(tvp7002_presets[preset->index].preset, preset);
 895 }
 896
 897 static const struct v4l2_ctrl_ops tvp7002_ctrl_ops = {
 898         .s_ctrl = tvp7002_s_ctrl,
 899 };
 900
 901 /* V4L2 core operation handlers */
 902 static const struct v4l2_subdev_core_ops tvp7002_core_ops = {
 903         .g_chip_ident = tvp7002_g_chip_ident,
 904         .log_status = tvp7002_log_status,
 905         .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
 906         .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
 907         .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
 908         .g_ctrl = v4l2_subdev_g_ctrl,
 909         .s_ctrl = v4l2_subdev_s_ctrl,
 910         .queryctrl = v4l2_subdev_queryctrl,
 911         .querymenu = v4l2_subdev_querymenu,
 912 #ifdef CONFIG_VIDEO_ADV_DEBUG
 913         .g_register = tvp7002_g_register,
 914         .s_register = tvp7002_s_register,
 915 #endif
 916 };
 917
 918 /* Specific video subsystem operation handlers */
 919 static const struct v4l2_subdev_video_ops tvp7002_video_ops = {
 920         .enum_dv_presets = tvp7002_enum_dv_presets,
 921         .s_dv_preset = tvp7002_s_dv_preset,
 922         .query_dv_preset = tvp7002_query_dv_preset,
 923         .s_stream = tvp7002_s_stream,
 924         .g_mbus_fmt = tvp7002_mbus_fmt,
 925         .try_mbus_fmt = tvp7002_mbus_fmt,
 926         .s_mbus_fmt = tvp7002_mbus_fmt,
 927         .enum_mbus_fmt = tvp7002_enum_mbus_fmt,
 928 };
 929
 930 /* V4L2 top level operation handlers */
 931 static const struct v4l2_subdev_ops tvp7002_ops = {
 932         .core = &tvp7002_core_ops,
 933         .video = &tvp7002_video_ops,
 934 };
 935
 936 /*
 937  * tvp7002_probe - Probe a TVP7002 device
 938  * @c: ptr to i2c_client struct
 939  * @id: ptr to i2c_device_id struct
 940  *
 941  * Initialize the TVP7002 device
 942  * Returns zero when successful, -EINVAL if register read fails or
 943  * -EIO if i2c access is not available.
 944  */
 945 static int tvp7002_probe(struct i2c_client *c, const struct i2c_device_id *id)
 946 {
 947         struct v4l2_subdev *sd;
 948         struct tvp7002 *device;
 949         struct v4l2_dv_preset preset;
 950         int polarity_a;
 951         int polarity_b;
 952         u8 revision;
 953
 954         int error;
 955
 956         /* Check if the adapter supports the needed features */
 957         if (!i2c_check_functionality(c->adapter,
 958                 I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 959                 return -EIO;
 960
 961         if (!c->dev.platform_data) {
 962                 v4l_err(c, "No platform data!!\n");
 963                 return -ENODEV;
 964         }
 965
 966         device = kzalloc(sizeof(struct tvp7002), GFP_KERNEL);
 967
 968         if (!device)
 969                 return -ENOMEM;
 970
 971         sd = &device->sd;
 972         device->pdata = c->dev.platform_data;
 973         device->current_preset = tvp7002_presets;
 974
 975         /* Tell v4l2 the device is ready */
 976         v4l2_i2c_subdev_init(sd, c, &tvp7002_ops);
 977         v4l_info(c, "tvp7002 found @ 0x%02x (%s)\n",
 978                                         c->addr, c->adapter->name);
 979
 980         error = tvp7002_read(sd, TVP7002_CHIP_REV, &revision);
 981         if (error < 0)
 982                 goto found_error;
 983
 984         /* Get revision number */
 985         v4l2_info(sd, "Rev. %02x detected.\n", revision);
 986         if (revision != 0x02)
 987                 v4l2_info(sd, "Unknown revision detected.\n");
 988
 989         /* Initializes TVP7002 to its default values */
 990         error = tvp7002_write_inittab(sd, tvp7002_init_default);
 991
 992         if (error < 0)
 993                 goto found_error;
 994
 995         /* Set polarity information after registers have been set */
 996         polarity_a = 0x20 | device->pdata->hs_polarity << 5
 997                         | device->pdata->vs_polarity << 2;
 998         error = tvp7002_write(sd, TVP7002_SYNC_CTL_1, polarity_a);
 999         if (error < 0)
1000                 goto found_error;
1001
1002         polarity_b = 0x01  | device->pdata->fid_polarity << 2
1003                         | device->pdata->sog_polarity << 1
1004                         | device->pdata->clk_polarity;
1005         error = tvp7002_write(sd, TVP7002_MISC_CTL_3, polarity_b);
1006         if (error < 0)
1007                 goto found_error;
1008
1009         /* Set registers according to default video mode */
1010         preset.preset = device->current_preset->preset;
1011         error = tvp7002_s_dv_preset(sd, &preset);
1012
1013         v4l2_ctrl_handler_init(&device->hdl, 1);
1014         v4l2_ctrl_new_std(&device->hdl, &tvp7002_ctrl_ops,
1015                         V4L2_CID_GAIN, 0, 255, 1, 0);
1016         sd->ctrl_handler = &device->hdl;
1017         if (device->hdl.error) {
1018                 int err = device->hdl.error;
1019
1020                 v4l2_ctrl_handler_free(&device->hdl);
1021                 kfree(device);
1022                 return err;
1023         }
1024         v4l2_ctrl_handler_setup(&device->hdl);
1025
1026 found_error:
1027         if (error < 0)
1028                 kfree(device);
1029
1030         return error;
1031 }
1032
1033 /*
1034  * tvp7002_remove - Remove TVP7002 device support
1035  * @c: ptr to i2c_client struct
1036  *
1037  * Reset the TVP7002 device
1038  * Returns zero.
1039  */
1040 static int tvp7002_remove(struct i2c_client *c)
1041 {
1042         struct v4l2_subdev *sd = i2c_get_clientdata(c);
1043         struct tvp7002 *device = to_tvp7002(sd);
1044
1045         v4l2_dbg(1, debug, sd, "Removing tvp7002 adapter"
1046                                 "on address 0x%x\n", c->addr);
1047
1048         v4l2_device_unregister_subdev(sd);
1049         v4l2_ctrl_handler_free(&device->hdl);
1050         kfree(device);
1051         return 0;
1052 }
1053
1054 /* I2C Device ID table */
1055 static const struct i2c_device_id tvp7002_id[] = {
1056         { "tvp7002", 0 },
1057         { }
1058 };
1059 MODULE_DEVICE_TABLE(i2c, tvp7002_id);
1060
1061 /* I2C driver data */
1062 static struct i2c_driver tvp7002_driver = {
1063         .driver = {
1064                 .owner = THIS_MODULE,
1065                 .name = TVP7002_MODULE_NAME,
1066         },
1067         .probe = tvp7002_probe,
1068         .remove = tvp7002_remove,
1069         .id_table = tvp7002_id,
1070 };
1071
1072 /*
1073  * tvp7002_init - Initialize driver via I2C interface
1074  *
1075  * Register the TVP7002 driver.
1076  * Return 0 on success or error code on failure.
1077  */
1078 static int __init tvp7002_init(void)
1079 {
1080         return i2c_add_driver(&tvp7002_driver);
1081 }
1082
1083 /*
1084  * tvp7002_exit - Remove driver via I2C interface
1085  *
1086  * Unregister the TVP7002 driver.
1087  * Returns nothing.
1088  */
1089 static void __exit tvp7002_exit(void)
1090 {
1091         i2c_del_driver(&tvp7002_driver);
1092 }
1093
1094 module_init(tvp7002_init);
1095 module_exit(tvp7002_exit);