Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1 | /* |
| 2 | * A V4L2 driver for OmniVision OV7670 cameras. |
| 3 | * |
| 4 | * Copyright 2006 One Laptop Per Child Association, Inc. Written |
| 5 | * by Jonathan Corbet with substantial inspiration from Mark |
| 6 | * McClelland's ovcamchip code. |
| 7 | * |
Jonathan Corbet | 77d5140 | 2007-03-22 19:44:17 -0300 | [diff] [blame] | 8 | * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net> |
| 9 | * |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 10 | * This file may be distributed under the terms of the GNU General |
| 11 | * Public License, version 2. |
| 12 | */ |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/module.h> |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 15 | #include <linux/slab.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/videodev.h> |
| 18 | #include <media/v4l2-common.h> |
Hans Verkuil | 3434eb7 | 2007-04-27 12:31:08 -0300 | [diff] [blame] | 19 | #include <media/v4l2-chip-ident.h> |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 20 | #include <linux/i2c.h> |
| 21 | |
| 22 | |
Dave Jones | 5e61447 | 2006-12-12 20:15:40 +0100 | [diff] [blame] | 23 | MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>"); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 24 | MODULE_DESCRIPTION("A low-level driver for OmniVision ov7670 sensors"); |
| 25 | MODULE_LICENSE("GPL"); |
| 26 | |
| 27 | /* |
| 28 | * Basic window sizes. These probably belong somewhere more globally |
| 29 | * useful. |
| 30 | */ |
| 31 | #define VGA_WIDTH 640 |
| 32 | #define VGA_HEIGHT 480 |
| 33 | #define QVGA_WIDTH 320 |
| 34 | #define QVGA_HEIGHT 240 |
| 35 | #define CIF_WIDTH 352 |
| 36 | #define CIF_HEIGHT 288 |
| 37 | #define QCIF_WIDTH 176 |
| 38 | #define QCIF_HEIGHT 144 |
| 39 | |
| 40 | /* |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 41 | * Our nominal (default) frame rate. |
| 42 | */ |
| 43 | #define OV7670_FRAME_RATE 30 |
| 44 | |
| 45 | /* |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 46 | * The 7670 sits on i2c with ID 0x42 |
| 47 | */ |
| 48 | #define OV7670_I2C_ADDR 0x42 |
| 49 | |
| 50 | /* Registers */ |
| 51 | #define REG_GAIN 0x00 /* Gain lower 8 bits (rest in vref) */ |
| 52 | #define REG_BLUE 0x01 /* blue gain */ |
| 53 | #define REG_RED 0x02 /* red gain */ |
| 54 | #define REG_VREF 0x03 /* Pieces of GAIN, VSTART, VSTOP */ |
| 55 | #define REG_COM1 0x04 /* Control 1 */ |
| 56 | #define COM1_CCIR656 0x40 /* CCIR656 enable */ |
| 57 | #define REG_BAVE 0x05 /* U/B Average level */ |
| 58 | #define REG_GbAVE 0x06 /* Y/Gb Average level */ |
| 59 | #define REG_AECHH 0x07 /* AEC MS 5 bits */ |
| 60 | #define REG_RAVE 0x08 /* V/R Average level */ |
| 61 | #define REG_COM2 0x09 /* Control 2 */ |
| 62 | #define COM2_SSLEEP 0x10 /* Soft sleep mode */ |
| 63 | #define REG_PID 0x0a /* Product ID MSB */ |
| 64 | #define REG_VER 0x0b /* Product ID LSB */ |
| 65 | #define REG_COM3 0x0c /* Control 3 */ |
| 66 | #define COM3_SWAP 0x40 /* Byte swap */ |
| 67 | #define COM3_SCALEEN 0x08 /* Enable scaling */ |
| 68 | #define COM3_DCWEN 0x04 /* Enable downsamp/crop/window */ |
| 69 | #define REG_COM4 0x0d /* Control 4 */ |
| 70 | #define REG_COM5 0x0e /* All "reserved" */ |
| 71 | #define REG_COM6 0x0f /* Control 6 */ |
| 72 | #define REG_AECH 0x10 /* More bits of AEC value */ |
| 73 | #define REG_CLKRC 0x11 /* Clocl control */ |
| 74 | #define CLK_EXT 0x40 /* Use external clock directly */ |
| 75 | #define CLK_SCALE 0x3f /* Mask for internal clock scale */ |
| 76 | #define REG_COM7 0x12 /* Control 7 */ |
| 77 | #define COM7_RESET 0x80 /* Register reset */ |
| 78 | #define COM7_FMT_MASK 0x38 |
| 79 | #define COM7_FMT_VGA 0x00 |
| 80 | #define COM7_FMT_CIF 0x20 /* CIF format */ |
| 81 | #define COM7_FMT_QVGA 0x10 /* QVGA format */ |
| 82 | #define COM7_FMT_QCIF 0x08 /* QCIF format */ |
| 83 | #define COM7_RGB 0x04 /* bits 0 and 2 - RGB format */ |
| 84 | #define COM7_YUV 0x00 /* YUV */ |
| 85 | #define COM7_BAYER 0x01 /* Bayer format */ |
| 86 | #define COM7_PBAYER 0x05 /* "Processed bayer" */ |
| 87 | #define REG_COM8 0x13 /* Control 8 */ |
| 88 | #define COM8_FASTAEC 0x80 /* Enable fast AGC/AEC */ |
| 89 | #define COM8_AECSTEP 0x40 /* Unlimited AEC step size */ |
| 90 | #define COM8_BFILT 0x20 /* Band filter enable */ |
| 91 | #define COM8_AGC 0x04 /* Auto gain enable */ |
| 92 | #define COM8_AWB 0x02 /* White balance enable */ |
| 93 | #define COM8_AEC 0x01 /* Auto exposure enable */ |
| 94 | #define REG_COM9 0x14 /* Control 9 - gain ceiling */ |
| 95 | #define REG_COM10 0x15 /* Control 10 */ |
| 96 | #define COM10_HSYNC 0x40 /* HSYNC instead of HREF */ |
| 97 | #define COM10_PCLK_HB 0x20 /* Suppress PCLK on horiz blank */ |
| 98 | #define COM10_HREF_REV 0x08 /* Reverse HREF */ |
| 99 | #define COM10_VS_LEAD 0x04 /* VSYNC on clock leading edge */ |
| 100 | #define COM10_VS_NEG 0x02 /* VSYNC negative */ |
| 101 | #define COM10_HS_NEG 0x01 /* HSYNC negative */ |
| 102 | #define REG_HSTART 0x17 /* Horiz start high bits */ |
| 103 | #define REG_HSTOP 0x18 /* Horiz stop high bits */ |
| 104 | #define REG_VSTART 0x19 /* Vert start high bits */ |
| 105 | #define REG_VSTOP 0x1a /* Vert stop high bits */ |
| 106 | #define REG_PSHFT 0x1b /* Pixel delay after HREF */ |
| 107 | #define REG_MIDH 0x1c /* Manuf. ID high */ |
| 108 | #define REG_MIDL 0x1d /* Manuf. ID low */ |
| 109 | #define REG_MVFP 0x1e /* Mirror / vflip */ |
| 110 | #define MVFP_MIRROR 0x20 /* Mirror image */ |
| 111 | #define MVFP_FLIP 0x10 /* Vertical flip */ |
| 112 | |
| 113 | #define REG_AEW 0x24 /* AGC upper limit */ |
| 114 | #define REG_AEB 0x25 /* AGC lower limit */ |
| 115 | #define REG_VPT 0x26 /* AGC/AEC fast mode op region */ |
| 116 | #define REG_HSYST 0x30 /* HSYNC rising edge delay */ |
| 117 | #define REG_HSYEN 0x31 /* HSYNC falling edge delay */ |
| 118 | #define REG_HREF 0x32 /* HREF pieces */ |
| 119 | #define REG_TSLB 0x3a /* lots of stuff */ |
| 120 | #define TSLB_YLAST 0x04 /* UYVY or VYUY - see com13 */ |
| 121 | #define REG_COM11 0x3b /* Control 11 */ |
| 122 | #define COM11_NIGHT 0x80 /* NIght mode enable */ |
| 123 | #define COM11_NMFR 0x60 /* Two bit NM frame rate */ |
| 124 | #define COM11_HZAUTO 0x10 /* Auto detect 50/60 Hz */ |
| 125 | #define COM11_50HZ 0x08 /* Manual 50Hz select */ |
| 126 | #define COM11_EXP 0x02 |
| 127 | #define REG_COM12 0x3c /* Control 12 */ |
| 128 | #define COM12_HREF 0x80 /* HREF always */ |
| 129 | #define REG_COM13 0x3d /* Control 13 */ |
| 130 | #define COM13_GAMMA 0x80 /* Gamma enable */ |
| 131 | #define COM13_UVSAT 0x40 /* UV saturation auto adjustment */ |
| 132 | #define COM13_UVSWAP 0x01 /* V before U - w/TSLB */ |
| 133 | #define REG_COM14 0x3e /* Control 14 */ |
| 134 | #define COM14_DCWEN 0x10 /* DCW/PCLK-scale enable */ |
| 135 | #define REG_EDGE 0x3f /* Edge enhancement factor */ |
| 136 | #define REG_COM15 0x40 /* Control 15 */ |
| 137 | #define COM15_R10F0 0x00 /* Data range 10 to F0 */ |
| 138 | #define COM15_R01FE 0x80 /* 01 to FE */ |
| 139 | #define COM15_R00FF 0xc0 /* 00 to FF */ |
| 140 | #define COM15_RGB565 0x10 /* RGB565 output */ |
| 141 | #define COM15_RGB555 0x30 /* RGB555 output */ |
| 142 | #define REG_COM16 0x41 /* Control 16 */ |
| 143 | #define COM16_AWBGAIN 0x08 /* AWB gain enable */ |
| 144 | #define REG_COM17 0x42 /* Control 17 */ |
| 145 | #define COM17_AECWIN 0xc0 /* AEC window - must match COM4 */ |
| 146 | #define COM17_CBAR 0x08 /* DSP Color bar */ |
| 147 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 148 | /* |
| 149 | * This matrix defines how the colors are generated, must be |
| 150 | * tweaked to adjust hue and saturation. |
| 151 | * |
| 152 | * Order: v-red, v-green, v-blue, u-red, u-green, u-blue |
| 153 | * |
| 154 | * They are nine-bit signed quantities, with the sign bit |
| 155 | * stored in 0x58. Sign for v-red is bit 0, and up from there. |
| 156 | */ |
| 157 | #define REG_CMATRIX_BASE 0x4f |
| 158 | #define CMATRIX_LEN 6 |
| 159 | #define REG_CMATRIX_SIGN 0x58 |
| 160 | |
| 161 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 162 | #define REG_BRIGHT 0x55 /* Brightness */ |
| 163 | #define REG_CONTRAS 0x56 /* Contrast control */ |
| 164 | |
| 165 | #define REG_GFIX 0x69 /* Fix gain control */ |
| 166 | |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 167 | #define REG_REG76 0x76 /* OV's name */ |
| 168 | #define R76_BLKPCOR 0x80 /* Black pixel correction enable */ |
| 169 | #define R76_WHTPCOR 0x40 /* White pixel correction enable */ |
| 170 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 171 | #define REG_RGB444 0x8c /* RGB 444 control */ |
| 172 | #define R444_ENABLE 0x02 /* Turn on RGB444, overrides 5x5 */ |
| 173 | #define R444_RGBX 0x01 /* Empty nibble at end */ |
| 174 | |
| 175 | #define REG_HAECC1 0x9f /* Hist AEC/AGC control 1 */ |
| 176 | #define REG_HAECC2 0xa0 /* Hist AEC/AGC control 2 */ |
| 177 | |
| 178 | #define REG_BD50MAX 0xa5 /* 50hz banding step limit */ |
| 179 | #define REG_HAECC3 0xa6 /* Hist AEC/AGC control 3 */ |
| 180 | #define REG_HAECC4 0xa7 /* Hist AEC/AGC control 4 */ |
| 181 | #define REG_HAECC5 0xa8 /* Hist AEC/AGC control 5 */ |
| 182 | #define REG_HAECC6 0xa9 /* Hist AEC/AGC control 6 */ |
| 183 | #define REG_HAECC7 0xaa /* Hist AEC/AGC control 7 */ |
| 184 | #define REG_BD60MAX 0xab /* 60hz banding step limit */ |
| 185 | |
| 186 | |
| 187 | /* |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 188 | * Information we maintain about a known sensor. |
| 189 | */ |
| 190 | struct ov7670_format_struct; /* coming later */ |
| 191 | struct ov7670_info { |
| 192 | struct ov7670_format_struct *fmt; /* Current format */ |
| 193 | unsigned char sat; /* Saturation value */ |
| 194 | int hue; /* Hue value */ |
| 195 | }; |
| 196 | |
| 197 | |
| 198 | |
| 199 | |
| 200 | /* |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 201 | * The default register settings, as obtained from OmniVision. There |
| 202 | * is really no making sense of most of these - lots of "reserved" values |
| 203 | * and such. |
| 204 | * |
| 205 | * These settings give VGA YUYV. |
| 206 | */ |
| 207 | |
| 208 | struct regval_list { |
| 209 | unsigned char reg_num; |
| 210 | unsigned char value; |
| 211 | }; |
| 212 | |
| 213 | static struct regval_list ov7670_default_regs[] = { |
| 214 | { REG_COM7, COM7_RESET }, |
| 215 | /* |
| 216 | * Clock scale: 3 = 15fps |
| 217 | * 2 = 20fps |
| 218 | * 1 = 30fps |
| 219 | */ |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 220 | { REG_CLKRC, 0x1 }, /* OV: clock scale (30 fps) */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 221 | { REG_TSLB, 0x04 }, /* OV */ |
| 222 | { REG_COM7, 0 }, /* VGA */ |
| 223 | /* |
| 224 | * Set the hardware window. These values from OV don't entirely |
| 225 | * make sense - hstop is less than hstart. But they work... |
| 226 | */ |
| 227 | { REG_HSTART, 0x13 }, { REG_HSTOP, 0x01 }, |
| 228 | { REG_HREF, 0xb6 }, { REG_VSTART, 0x02 }, |
| 229 | { REG_VSTOP, 0x7a }, { REG_VREF, 0x0a }, |
| 230 | |
| 231 | { REG_COM3, 0 }, { REG_COM14, 0 }, |
| 232 | /* Mystery scaling numbers */ |
| 233 | { 0x70, 0x3a }, { 0x71, 0x35 }, |
| 234 | { 0x72, 0x11 }, { 0x73, 0xf0 }, |
| 235 | { 0xa2, 0x02 }, { REG_COM10, 0x0 }, |
| 236 | |
| 237 | /* Gamma curve values */ |
| 238 | { 0x7a, 0x20 }, { 0x7b, 0x10 }, |
| 239 | { 0x7c, 0x1e }, { 0x7d, 0x35 }, |
| 240 | { 0x7e, 0x5a }, { 0x7f, 0x69 }, |
| 241 | { 0x80, 0x76 }, { 0x81, 0x80 }, |
| 242 | { 0x82, 0x88 }, { 0x83, 0x8f }, |
| 243 | { 0x84, 0x96 }, { 0x85, 0xa3 }, |
| 244 | { 0x86, 0xaf }, { 0x87, 0xc4 }, |
| 245 | { 0x88, 0xd7 }, { 0x89, 0xe8 }, |
| 246 | |
| 247 | /* AGC and AEC parameters. Note we start by disabling those features, |
| 248 | then turn them only after tweaking the values. */ |
| 249 | { REG_COM8, COM8_FASTAEC | COM8_AECSTEP | COM8_BFILT }, |
| 250 | { REG_GAIN, 0 }, { REG_AECH, 0 }, |
| 251 | { REG_COM4, 0x40 }, /* magic reserved bit */ |
| 252 | { REG_COM9, 0x18 }, /* 4x gain + magic rsvd bit */ |
| 253 | { REG_BD50MAX, 0x05 }, { REG_BD60MAX, 0x07 }, |
| 254 | { REG_AEW, 0x95 }, { REG_AEB, 0x33 }, |
| 255 | { REG_VPT, 0xe3 }, { REG_HAECC1, 0x78 }, |
| 256 | { REG_HAECC2, 0x68 }, { 0xa1, 0x03 }, /* magic */ |
| 257 | { REG_HAECC3, 0xd8 }, { REG_HAECC4, 0xd8 }, |
| 258 | { REG_HAECC5, 0xf0 }, { REG_HAECC6, 0x90 }, |
| 259 | { REG_HAECC7, 0x94 }, |
| 260 | { REG_COM8, COM8_FASTAEC|COM8_AECSTEP|COM8_BFILT|COM8_AGC|COM8_AEC }, |
| 261 | |
| 262 | /* Almost all of these are magic "reserved" values. */ |
| 263 | { REG_COM5, 0x61 }, { REG_COM6, 0x4b }, |
Jonathan Corbet | 7f7b12f | 2007-03-25 11:36:42 -0300 | [diff] [blame] | 264 | { 0x16, 0x02 }, { REG_MVFP, 0x07 }, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 265 | { 0x21, 0x02 }, { 0x22, 0x91 }, |
| 266 | { 0x29, 0x07 }, { 0x33, 0x0b }, |
| 267 | { 0x35, 0x0b }, { 0x37, 0x1d }, |
| 268 | { 0x38, 0x71 }, { 0x39, 0x2a }, |
| 269 | { REG_COM12, 0x78 }, { 0x4d, 0x40 }, |
| 270 | { 0x4e, 0x20 }, { REG_GFIX, 0 }, |
| 271 | { 0x6b, 0x4a }, { 0x74, 0x10 }, |
| 272 | { 0x8d, 0x4f }, { 0x8e, 0 }, |
| 273 | { 0x8f, 0 }, { 0x90, 0 }, |
| 274 | { 0x91, 0 }, { 0x96, 0 }, |
| 275 | { 0x9a, 0 }, { 0xb0, 0x84 }, |
| 276 | { 0xb1, 0x0c }, { 0xb2, 0x0e }, |
| 277 | { 0xb3, 0x82 }, { 0xb8, 0x0a }, |
| 278 | |
| 279 | /* More reserved magic, some of which tweaks white balance */ |
| 280 | { 0x43, 0x0a }, { 0x44, 0xf0 }, |
| 281 | { 0x45, 0x34 }, { 0x46, 0x58 }, |
| 282 | { 0x47, 0x28 }, { 0x48, 0x3a }, |
| 283 | { 0x59, 0x88 }, { 0x5a, 0x88 }, |
| 284 | { 0x5b, 0x44 }, { 0x5c, 0x67 }, |
| 285 | { 0x5d, 0x49 }, { 0x5e, 0x0e }, |
| 286 | { 0x6c, 0x0a }, { 0x6d, 0x55 }, |
| 287 | { 0x6e, 0x11 }, { 0x6f, 0x9f }, /* "9e for advance AWB" */ |
| 288 | { 0x6a, 0x40 }, { REG_BLUE, 0x40 }, |
| 289 | { REG_RED, 0x60 }, |
| 290 | { REG_COM8, COM8_FASTAEC|COM8_AECSTEP|COM8_BFILT|COM8_AGC|COM8_AEC|COM8_AWB }, |
| 291 | |
| 292 | /* Matrix coefficients */ |
| 293 | { 0x4f, 0x80 }, { 0x50, 0x80 }, |
| 294 | { 0x51, 0 }, { 0x52, 0x22 }, |
| 295 | { 0x53, 0x5e }, { 0x54, 0x80 }, |
| 296 | { 0x58, 0x9e }, |
| 297 | |
| 298 | { REG_COM16, COM16_AWBGAIN }, { REG_EDGE, 0 }, |
| 299 | { 0x75, 0x05 }, { 0x76, 0xe1 }, |
| 300 | { 0x4c, 0 }, { 0x77, 0x01 }, |
| 301 | { REG_COM13, 0xc3 }, { 0x4b, 0x09 }, |
| 302 | { 0xc9, 0x60 }, { REG_COM16, 0x38 }, |
| 303 | { 0x56, 0x40 }, |
| 304 | |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 305 | { 0x34, 0x11 }, { REG_COM11, COM11_EXP|COM11_HZAUTO }, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 306 | { 0xa4, 0x88 }, { 0x96, 0 }, |
| 307 | { 0x97, 0x30 }, { 0x98, 0x20 }, |
| 308 | { 0x99, 0x30 }, { 0x9a, 0x84 }, |
| 309 | { 0x9b, 0x29 }, { 0x9c, 0x03 }, |
| 310 | { 0x9d, 0x4c }, { 0x9e, 0x3f }, |
| 311 | { 0x78, 0x04 }, |
| 312 | |
| 313 | /* Extra-weird stuff. Some sort of multiplexor register */ |
| 314 | { 0x79, 0x01 }, { 0xc8, 0xf0 }, |
| 315 | { 0x79, 0x0f }, { 0xc8, 0x00 }, |
| 316 | { 0x79, 0x10 }, { 0xc8, 0x7e }, |
| 317 | { 0x79, 0x0a }, { 0xc8, 0x80 }, |
| 318 | { 0x79, 0x0b }, { 0xc8, 0x01 }, |
| 319 | { 0x79, 0x0c }, { 0xc8, 0x0f }, |
| 320 | { 0x79, 0x0d }, { 0xc8, 0x20 }, |
| 321 | { 0x79, 0x09 }, { 0xc8, 0x80 }, |
| 322 | { 0x79, 0x02 }, { 0xc8, 0xc0 }, |
| 323 | { 0x79, 0x03 }, { 0xc8, 0x40 }, |
| 324 | { 0x79, 0x05 }, { 0xc8, 0x30 }, |
| 325 | { 0x79, 0x26 }, |
| 326 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 327 | { 0xff, 0xff }, /* END MARKER */ |
| 328 | }; |
| 329 | |
| 330 | |
| 331 | /* |
| 332 | * Here we'll try to encapsulate the changes for just the output |
| 333 | * video format. |
| 334 | * |
| 335 | * RGB656 and YUV422 come from OV; RGB444 is homebrewed. |
| 336 | * |
| 337 | * IMPORTANT RULE: the first entry must be for COM7, see ov7670_s_fmt for why. |
| 338 | */ |
| 339 | |
| 340 | |
| 341 | static struct regval_list ov7670_fmt_yuv422[] = { |
| 342 | { REG_COM7, 0x0 }, /* Selects YUV mode */ |
| 343 | { REG_RGB444, 0 }, /* No RGB444 please */ |
| 344 | { REG_COM1, 0 }, |
| 345 | { REG_COM15, COM15_R00FF }, |
| 346 | { REG_COM9, 0x18 }, /* 4x gain ceiling; 0x8 is reserved bit */ |
| 347 | { 0x4f, 0x80 }, /* "matrix coefficient 1" */ |
| 348 | { 0x50, 0x80 }, /* "matrix coefficient 2" */ |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 349 | { 0x51, 0 }, /* vb */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 350 | { 0x52, 0x22 }, /* "matrix coefficient 4" */ |
| 351 | { 0x53, 0x5e }, /* "matrix coefficient 5" */ |
| 352 | { 0x54, 0x80 }, /* "matrix coefficient 6" */ |
| 353 | { REG_COM13, COM13_GAMMA|COM13_UVSAT }, |
| 354 | { 0xff, 0xff }, |
| 355 | }; |
| 356 | |
| 357 | static struct regval_list ov7670_fmt_rgb565[] = { |
| 358 | { REG_COM7, COM7_RGB }, /* Selects RGB mode */ |
| 359 | { REG_RGB444, 0 }, /* No RGB444 please */ |
| 360 | { REG_COM1, 0x0 }, |
| 361 | { REG_COM15, COM15_RGB565 }, |
| 362 | { REG_COM9, 0x38 }, /* 16x gain ceiling; 0x8 is reserved bit */ |
| 363 | { 0x4f, 0xb3 }, /* "matrix coefficient 1" */ |
| 364 | { 0x50, 0xb3 }, /* "matrix coefficient 2" */ |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 365 | { 0x51, 0 }, /* vb */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 366 | { 0x52, 0x3d }, /* "matrix coefficient 4" */ |
| 367 | { 0x53, 0xa7 }, /* "matrix coefficient 5" */ |
| 368 | { 0x54, 0xe4 }, /* "matrix coefficient 6" */ |
| 369 | { REG_COM13, COM13_GAMMA|COM13_UVSAT }, |
| 370 | { 0xff, 0xff }, |
| 371 | }; |
| 372 | |
| 373 | static struct regval_list ov7670_fmt_rgb444[] = { |
| 374 | { REG_COM7, COM7_RGB }, /* Selects RGB mode */ |
| 375 | { REG_RGB444, R444_ENABLE }, /* Enable xxxxrrrr ggggbbbb */ |
| 376 | { REG_COM1, 0x40 }, /* Magic reserved bit */ |
| 377 | { REG_COM15, COM15_R01FE|COM15_RGB565 }, /* Data range needed? */ |
| 378 | { REG_COM9, 0x38 }, /* 16x gain ceiling; 0x8 is reserved bit */ |
| 379 | { 0x4f, 0xb3 }, /* "matrix coefficient 1" */ |
| 380 | { 0x50, 0xb3 }, /* "matrix coefficient 2" */ |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 381 | { 0x51, 0 }, /* vb */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 382 | { 0x52, 0x3d }, /* "matrix coefficient 4" */ |
| 383 | { 0x53, 0xa7 }, /* "matrix coefficient 5" */ |
| 384 | { 0x54, 0xe4 }, /* "matrix coefficient 6" */ |
| 385 | { REG_COM13, COM13_GAMMA|COM13_UVSAT|0x2 }, /* Magic rsvd bit */ |
| 386 | { 0xff, 0xff }, |
| 387 | }; |
| 388 | |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 389 | static struct regval_list ov7670_fmt_raw[] = { |
| 390 | { REG_COM7, COM7_BAYER }, |
| 391 | { REG_COM13, 0x08 }, /* No gamma, magic rsvd bit */ |
| 392 | { REG_COM16, 0x3d }, /* Edge enhancement, denoise */ |
| 393 | { REG_REG76, 0xe1 }, /* Pix correction, magic rsvd */ |
| 394 | { 0xff, 0xff }, |
| 395 | }; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 396 | |
| 397 | |
| 398 | |
| 399 | /* |
| 400 | * Low-level register I/O. |
| 401 | */ |
| 402 | |
| 403 | static int ov7670_read(struct i2c_client *c, unsigned char reg, |
| 404 | unsigned char *value) |
| 405 | { |
| 406 | int ret; |
| 407 | |
| 408 | ret = i2c_smbus_read_byte_data(c, reg); |
Andres Salomon | bca5c2c | 2008-07-12 13:47:54 -0700 | [diff] [blame] | 409 | if (ret >= 0) { |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 410 | *value = (unsigned char) ret; |
Andres Salomon | bca5c2c | 2008-07-12 13:47:54 -0700 | [diff] [blame] | 411 | ret = 0; |
| 412 | } |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 413 | return ret; |
| 414 | } |
| 415 | |
| 416 | |
| 417 | static int ov7670_write(struct i2c_client *c, unsigned char reg, |
| 418 | unsigned char value) |
| 419 | { |
Jonathan Corbet | 6d77444 | 2007-08-17 01:02:33 -0300 | [diff] [blame] | 420 | int ret = i2c_smbus_write_byte_data(c, reg, value); |
| 421 | if (reg == REG_COM7 && (value & COM7_RESET)) |
| 422 | msleep(2); /* Wait for reset to run */ |
| 423 | return ret; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | |
| 427 | /* |
| 428 | * Write a list of register settings; ff/ff stops the process. |
| 429 | */ |
| 430 | static int ov7670_write_array(struct i2c_client *c, struct regval_list *vals) |
| 431 | { |
| 432 | while (vals->reg_num != 0xff || vals->value != 0xff) { |
| 433 | int ret = ov7670_write(c, vals->reg_num, vals->value); |
| 434 | if (ret < 0) |
| 435 | return ret; |
| 436 | vals++; |
| 437 | } |
| 438 | return 0; |
| 439 | } |
| 440 | |
| 441 | |
| 442 | /* |
| 443 | * Stuff that knows about the sensor. |
| 444 | */ |
| 445 | static void ov7670_reset(struct i2c_client *client) |
| 446 | { |
| 447 | ov7670_write(client, REG_COM7, COM7_RESET); |
| 448 | msleep(1); |
| 449 | } |
| 450 | |
| 451 | |
| 452 | static int ov7670_init(struct i2c_client *client) |
| 453 | { |
| 454 | return ov7670_write_array(client, ov7670_default_regs); |
| 455 | } |
| 456 | |
| 457 | |
| 458 | |
| 459 | static int ov7670_detect(struct i2c_client *client) |
| 460 | { |
| 461 | unsigned char v; |
| 462 | int ret; |
| 463 | |
| 464 | ret = ov7670_init(client); |
| 465 | if (ret < 0) |
| 466 | return ret; |
| 467 | ret = ov7670_read(client, REG_MIDH, &v); |
| 468 | if (ret < 0) |
| 469 | return ret; |
| 470 | if (v != 0x7f) /* OV manuf. id. */ |
| 471 | return -ENODEV; |
| 472 | ret = ov7670_read(client, REG_MIDL, &v); |
| 473 | if (ret < 0) |
| 474 | return ret; |
| 475 | if (v != 0xa2) |
| 476 | return -ENODEV; |
| 477 | /* |
| 478 | * OK, we know we have an OmniVision chip...but which one? |
| 479 | */ |
| 480 | ret = ov7670_read(client, REG_PID, &v); |
| 481 | if (ret < 0) |
| 482 | return ret; |
| 483 | if (v != 0x76) /* PID + VER = 0x76 / 0x73 */ |
| 484 | return -ENODEV; |
| 485 | ret = ov7670_read(client, REG_VER, &v); |
| 486 | if (ret < 0) |
| 487 | return ret; |
| 488 | if (v != 0x73) /* PID + VER = 0x76 / 0x73 */ |
| 489 | return -ENODEV; |
| 490 | return 0; |
| 491 | } |
| 492 | |
| 493 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 494 | /* |
| 495 | * Store information about the video data format. The color matrix |
| 496 | * is deeply tied into the format, so keep the relevant values here. |
| 497 | * The magic matrix nubmers come from OmniVision. |
| 498 | */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 499 | static struct ov7670_format_struct { |
| 500 | __u8 *desc; |
| 501 | __u32 pixelformat; |
| 502 | struct regval_list *regs; |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 503 | int cmatrix[CMATRIX_LEN]; |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 504 | int bpp; /* Bytes per pixel */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 505 | } ov7670_formats[] = { |
| 506 | { |
| 507 | .desc = "YUYV 4:2:2", |
| 508 | .pixelformat = V4L2_PIX_FMT_YUYV, |
| 509 | .regs = ov7670_fmt_yuv422, |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 510 | .cmatrix = { 128, -128, 0, -34, -94, 128 }, |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 511 | .bpp = 2, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 512 | }, |
| 513 | { |
| 514 | .desc = "RGB 444", |
| 515 | .pixelformat = V4L2_PIX_FMT_RGB444, |
| 516 | .regs = ov7670_fmt_rgb444, |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 517 | .cmatrix = { 179, -179, 0, -61, -176, 228 }, |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 518 | .bpp = 2, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 519 | }, |
| 520 | { |
| 521 | .desc = "RGB 565", |
| 522 | .pixelformat = V4L2_PIX_FMT_RGB565, |
| 523 | .regs = ov7670_fmt_rgb565, |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 524 | .cmatrix = { 179, -179, 0, -61, -176, 228 }, |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 525 | .bpp = 2, |
| 526 | }, |
| 527 | { |
| 528 | .desc = "Raw RGB Bayer", |
| 529 | .pixelformat = V4L2_PIX_FMT_SBGGR8, |
| 530 | .regs = ov7670_fmt_raw, |
| 531 | .cmatrix = { 0, 0, 0, 0, 0, 0 }, |
| 532 | .bpp = 1 |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 533 | }, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 534 | }; |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 535 | #define N_OV7670_FMTS ARRAY_SIZE(ov7670_formats) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 536 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 537 | |
| 538 | /* |
| 539 | * Then there is the issue of window sizes. Try to capture the info here. |
| 540 | */ |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 541 | |
| 542 | /* |
| 543 | * QCIF mode is done (by OV) in a very strange way - it actually looks like |
| 544 | * VGA with weird scaling options - they do *not* use the canned QCIF mode |
| 545 | * which is allegedly provided by the sensor. So here's the weird register |
| 546 | * settings. |
| 547 | */ |
| 548 | static struct regval_list ov7670_qcif_regs[] = { |
| 549 | { REG_COM3, COM3_SCALEEN|COM3_DCWEN }, |
| 550 | { REG_COM3, COM3_DCWEN }, |
| 551 | { REG_COM14, COM14_DCWEN | 0x01}, |
| 552 | { 0x73, 0xf1 }, |
| 553 | { 0xa2, 0x52 }, |
| 554 | { 0x7b, 0x1c }, |
| 555 | { 0x7c, 0x28 }, |
| 556 | { 0x7d, 0x3c }, |
| 557 | { 0x7f, 0x69 }, |
| 558 | { REG_COM9, 0x38 }, |
| 559 | { 0xa1, 0x0b }, |
| 560 | { 0x74, 0x19 }, |
| 561 | { 0x9a, 0x80 }, |
| 562 | { 0x43, 0x14 }, |
| 563 | { REG_COM13, 0xc0 }, |
| 564 | { 0xff, 0xff }, |
| 565 | }; |
| 566 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 567 | static struct ov7670_win_size { |
| 568 | int width; |
| 569 | int height; |
| 570 | unsigned char com7_bit; |
| 571 | int hstart; /* Start/stop values for the camera. Note */ |
| 572 | int hstop; /* that they do not always make complete */ |
| 573 | int vstart; /* sense to humans, but evidently the sensor */ |
| 574 | int vstop; /* will do the right thing... */ |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 575 | struct regval_list *regs; /* Regs to tweak */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 576 | /* h/vref stuff */ |
| 577 | } ov7670_win_sizes[] = { |
| 578 | /* VGA */ |
| 579 | { |
| 580 | .width = VGA_WIDTH, |
| 581 | .height = VGA_HEIGHT, |
| 582 | .com7_bit = COM7_FMT_VGA, |
| 583 | .hstart = 158, /* These values from */ |
| 584 | .hstop = 14, /* Omnivision */ |
| 585 | .vstart = 10, |
| 586 | .vstop = 490, |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 587 | .regs = NULL, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 588 | }, |
| 589 | /* CIF */ |
| 590 | { |
| 591 | .width = CIF_WIDTH, |
| 592 | .height = CIF_HEIGHT, |
| 593 | .com7_bit = COM7_FMT_CIF, |
| 594 | .hstart = 170, /* Empirically determined */ |
| 595 | .hstop = 90, |
| 596 | .vstart = 14, |
| 597 | .vstop = 494, |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 598 | .regs = NULL, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 599 | }, |
| 600 | /* QVGA */ |
| 601 | { |
| 602 | .width = QVGA_WIDTH, |
| 603 | .height = QVGA_HEIGHT, |
| 604 | .com7_bit = COM7_FMT_QVGA, |
| 605 | .hstart = 164, /* Empirically determined */ |
| 606 | .hstop = 20, |
| 607 | .vstart = 14, |
| 608 | .vstop = 494, |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 609 | .regs = NULL, |
| 610 | }, |
| 611 | /* QCIF */ |
| 612 | { |
| 613 | .width = QCIF_WIDTH, |
| 614 | .height = QCIF_HEIGHT, |
| 615 | .com7_bit = COM7_FMT_VGA, /* see comment above */ |
| 616 | .hstart = 456, /* Empirically determined */ |
| 617 | .hstop = 24, |
| 618 | .vstart = 14, |
| 619 | .vstop = 494, |
| 620 | .regs = ov7670_qcif_regs, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 621 | }, |
| 622 | }; |
| 623 | |
Robert P. J. Day | 0c71bf1 | 2007-06-05 05:20:56 -0300 | [diff] [blame] | 624 | #define N_WIN_SIZES (ARRAY_SIZE(ov7670_win_sizes)) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 625 | |
| 626 | |
| 627 | /* |
| 628 | * Store a set of start/stop values into the camera. |
| 629 | */ |
| 630 | static int ov7670_set_hw(struct i2c_client *client, int hstart, int hstop, |
| 631 | int vstart, int vstop) |
| 632 | { |
| 633 | int ret; |
| 634 | unsigned char v; |
| 635 | /* |
| 636 | * Horizontal: 11 bits, top 8 live in hstart and hstop. Bottom 3 of |
| 637 | * hstart are in href[2:0], bottom 3 of hstop in href[5:3]. There is |
| 638 | * a mystery "edge offset" value in the top two bits of href. |
| 639 | */ |
| 640 | ret = ov7670_write(client, REG_HSTART, (hstart >> 3) & 0xff); |
| 641 | ret += ov7670_write(client, REG_HSTOP, (hstop >> 3) & 0xff); |
| 642 | ret += ov7670_read(client, REG_HREF, &v); |
| 643 | v = (v & 0xc0) | ((hstop & 0x7) << 3) | (hstart & 0x7); |
| 644 | msleep(10); |
| 645 | ret += ov7670_write(client, REG_HREF, v); |
| 646 | /* |
| 647 | * Vertical: similar arrangement, but only 10 bits. |
| 648 | */ |
| 649 | ret += ov7670_write(client, REG_VSTART, (vstart >> 2) & 0xff); |
| 650 | ret += ov7670_write(client, REG_VSTOP, (vstop >> 2) & 0xff); |
| 651 | ret += ov7670_read(client, REG_VREF, &v); |
| 652 | v = (v & 0xf0) | ((vstop & 0x3) << 2) | (vstart & 0x3); |
| 653 | msleep(10); |
| 654 | ret += ov7670_write(client, REG_VREF, v); |
| 655 | return ret; |
| 656 | } |
| 657 | |
| 658 | |
| 659 | static int ov7670_enum_fmt(struct i2c_client *c, struct v4l2_fmtdesc *fmt) |
| 660 | { |
| 661 | struct ov7670_format_struct *ofmt; |
| 662 | |
| 663 | if (fmt->index >= N_OV7670_FMTS) |
| 664 | return -EINVAL; |
| 665 | |
| 666 | ofmt = ov7670_formats + fmt->index; |
| 667 | fmt->flags = 0; |
| 668 | strcpy(fmt->description, ofmt->desc); |
| 669 | fmt->pixelformat = ofmt->pixelformat; |
| 670 | return 0; |
| 671 | } |
| 672 | |
| 673 | |
| 674 | static int ov7670_try_fmt(struct i2c_client *c, struct v4l2_format *fmt, |
| 675 | struct ov7670_format_struct **ret_fmt, |
| 676 | struct ov7670_win_size **ret_wsize) |
| 677 | { |
| 678 | int index; |
| 679 | struct ov7670_win_size *wsize; |
| 680 | struct v4l2_pix_format *pix = &fmt->fmt.pix; |
| 681 | |
| 682 | for (index = 0; index < N_OV7670_FMTS; index++) |
| 683 | if (ov7670_formats[index].pixelformat == pix->pixelformat) |
| 684 | break; |
Daniel Drake | cd257a6 | 2008-06-30 20:57:39 -0300 | [diff] [blame] | 685 | if (index >= N_OV7670_FMTS) { |
| 686 | /* default to first format */ |
| 687 | index = 0; |
| 688 | pix->pixelformat = ov7670_formats[0].pixelformat; |
| 689 | } |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 690 | if (ret_fmt != NULL) |
| 691 | *ret_fmt = ov7670_formats + index; |
| 692 | /* |
| 693 | * Fields: the OV devices claim to be progressive. |
| 694 | */ |
Daniel Drake | cd257a6 | 2008-06-30 20:57:39 -0300 | [diff] [blame] | 695 | pix->field = V4L2_FIELD_NONE; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 696 | /* |
| 697 | * Round requested image size down to the nearest |
| 698 | * we support, but not below the smallest. |
| 699 | */ |
| 700 | for (wsize = ov7670_win_sizes; wsize < ov7670_win_sizes + N_WIN_SIZES; |
| 701 | wsize++) |
| 702 | if (pix->width >= wsize->width && pix->height >= wsize->height) |
| 703 | break; |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 704 | if (wsize >= ov7670_win_sizes + N_WIN_SIZES) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 705 | wsize--; /* Take the smallest one */ |
| 706 | if (ret_wsize != NULL) |
| 707 | *ret_wsize = wsize; |
| 708 | /* |
| 709 | * Note the size we'll actually handle. |
| 710 | */ |
| 711 | pix->width = wsize->width; |
| 712 | pix->height = wsize->height; |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 713 | pix->bytesperline = pix->width*ov7670_formats[index].bpp; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 714 | pix->sizeimage = pix->height*pix->bytesperline; |
| 715 | return 0; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 716 | } |
| 717 | |
| 718 | /* |
| 719 | * Set a format. |
| 720 | */ |
| 721 | static int ov7670_s_fmt(struct i2c_client *c, struct v4l2_format *fmt) |
| 722 | { |
| 723 | int ret; |
| 724 | struct ov7670_format_struct *ovfmt; |
| 725 | struct ov7670_win_size *wsize; |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 726 | struct ov7670_info *info = i2c_get_clientdata(c); |
Jonathan Corbet | edd75ed | 2007-05-22 00:39:00 -0300 | [diff] [blame] | 727 | unsigned char com7, clkrc; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 728 | |
| 729 | ret = ov7670_try_fmt(c, fmt, &ovfmt, &wsize); |
| 730 | if (ret) |
| 731 | return ret; |
| 732 | /* |
Jonathan Corbet | edd75ed | 2007-05-22 00:39:00 -0300 | [diff] [blame] | 733 | * HACK: if we're running rgb565 we need to grab then rewrite |
| 734 | * CLKRC. If we're *not*, however, then rewriting clkrc hoses |
| 735 | * the colors. |
| 736 | */ |
| 737 | if (fmt->fmt.pix.pixelformat == V4L2_PIX_FMT_RGB565) { |
| 738 | ret = ov7670_read(c, REG_CLKRC, &clkrc); |
| 739 | if (ret) |
| 740 | return ret; |
| 741 | } |
| 742 | /* |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 743 | * COM7 is a pain in the ass, it doesn't like to be read then |
| 744 | * quickly written afterward. But we have everything we need |
| 745 | * to set it absolutely here, as long as the format-specific |
| 746 | * register sets list it first. |
| 747 | */ |
| 748 | com7 = ovfmt->regs[0].value; |
| 749 | com7 |= wsize->com7_bit; |
| 750 | ov7670_write(c, REG_COM7, com7); |
| 751 | /* |
| 752 | * Now write the rest of the array. Also store start/stops |
| 753 | */ |
| 754 | ov7670_write_array(c, ovfmt->regs + 1); |
| 755 | ov7670_set_hw(c, wsize->hstart, wsize->hstop, wsize->vstart, |
| 756 | wsize->vstop); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 757 | ret = 0; |
| 758 | if (wsize->regs) |
| 759 | ret = ov7670_write_array(c, wsize->regs); |
| 760 | info->fmt = ovfmt; |
Jonathan Corbet | edd75ed | 2007-05-22 00:39:00 -0300 | [diff] [blame] | 761 | |
| 762 | if (fmt->fmt.pix.pixelformat == V4L2_PIX_FMT_RGB565 && ret == 0) |
| 763 | ret = ov7670_write(c, REG_CLKRC, clkrc); |
| 764 | return ret; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 765 | } |
| 766 | |
| 767 | /* |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 768 | * Implement G/S_PARM. There is a "high quality" mode we could try |
| 769 | * to do someday; for now, we just do the frame rate tweak. |
| 770 | */ |
| 771 | static int ov7670_g_parm(struct i2c_client *c, struct v4l2_streamparm *parms) |
| 772 | { |
| 773 | struct v4l2_captureparm *cp = &parms->parm.capture; |
| 774 | unsigned char clkrc; |
| 775 | int ret; |
| 776 | |
| 777 | if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 778 | return -EINVAL; |
| 779 | ret = ov7670_read(c, REG_CLKRC, &clkrc); |
| 780 | if (ret < 0) |
| 781 | return ret; |
| 782 | memset(cp, 0, sizeof(struct v4l2_captureparm)); |
| 783 | cp->capability = V4L2_CAP_TIMEPERFRAME; |
| 784 | cp->timeperframe.numerator = 1; |
| 785 | cp->timeperframe.denominator = OV7670_FRAME_RATE; |
| 786 | if ((clkrc & CLK_EXT) == 0 && (clkrc & CLK_SCALE) > 1) |
| 787 | cp->timeperframe.denominator /= (clkrc & CLK_SCALE); |
| 788 | return 0; |
| 789 | } |
| 790 | |
| 791 | static int ov7670_s_parm(struct i2c_client *c, struct v4l2_streamparm *parms) |
| 792 | { |
| 793 | struct v4l2_captureparm *cp = &parms->parm.capture; |
| 794 | struct v4l2_fract *tpf = &cp->timeperframe; |
| 795 | unsigned char clkrc; |
| 796 | int ret, div; |
| 797 | |
| 798 | if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 799 | return -EINVAL; |
| 800 | if (cp->extendedmode != 0) |
| 801 | return -EINVAL; |
| 802 | /* |
| 803 | * CLKRC has a reserved bit, so let's preserve it. |
| 804 | */ |
| 805 | ret = ov7670_read(c, REG_CLKRC, &clkrc); |
| 806 | if (ret < 0) |
| 807 | return ret; |
| 808 | if (tpf->numerator == 0 || tpf->denominator == 0) |
| 809 | div = 1; /* Reset to full rate */ |
| 810 | else |
| 811 | div = (tpf->numerator*OV7670_FRAME_RATE)/tpf->denominator; |
| 812 | if (div == 0) |
| 813 | div = 1; |
| 814 | else if (div > CLK_SCALE) |
| 815 | div = CLK_SCALE; |
| 816 | clkrc = (clkrc & 0x80) | div; |
| 817 | tpf->numerator = 1; |
| 818 | tpf->denominator = OV7670_FRAME_RATE/div; |
| 819 | return ov7670_write(c, REG_CLKRC, clkrc); |
| 820 | } |
| 821 | |
| 822 | |
| 823 | |
| 824 | /* |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 825 | * Code for dealing with controls. |
| 826 | */ |
| 827 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 828 | |
| 829 | |
| 830 | |
| 831 | |
| 832 | static int ov7670_store_cmatrix(struct i2c_client *client, |
| 833 | int matrix[CMATRIX_LEN]) |
| 834 | { |
| 835 | int i, ret; |
| 836 | unsigned char signbits; |
| 837 | |
| 838 | /* |
| 839 | * Weird crap seems to exist in the upper part of |
| 840 | * the sign bits register, so let's preserve it. |
| 841 | */ |
| 842 | ret = ov7670_read(client, REG_CMATRIX_SIGN, &signbits); |
| 843 | signbits &= 0xc0; |
| 844 | |
| 845 | for (i = 0; i < CMATRIX_LEN; i++) { |
| 846 | unsigned char raw; |
| 847 | |
| 848 | if (matrix[i] < 0) { |
| 849 | signbits |= (1 << i); |
| 850 | if (matrix[i] < -255) |
| 851 | raw = 0xff; |
| 852 | else |
| 853 | raw = (-1 * matrix[i]) & 0xff; |
| 854 | } |
| 855 | else { |
| 856 | if (matrix[i] > 255) |
| 857 | raw = 0xff; |
| 858 | else |
| 859 | raw = matrix[i] & 0xff; |
| 860 | } |
| 861 | ret += ov7670_write(client, REG_CMATRIX_BASE + i, raw); |
| 862 | } |
| 863 | ret += ov7670_write(client, REG_CMATRIX_SIGN, signbits); |
| 864 | return ret; |
| 865 | } |
| 866 | |
| 867 | |
| 868 | /* |
| 869 | * Hue also requires messing with the color matrix. It also requires |
| 870 | * trig functions, which tend not to be well supported in the kernel. |
| 871 | * So here is a simple table of sine values, 0-90 degrees, in steps |
| 872 | * of five degrees. Values are multiplied by 1000. |
| 873 | * |
| 874 | * The following naive approximate trig functions require an argument |
| 875 | * carefully limited to -180 <= theta <= 180. |
| 876 | */ |
| 877 | #define SIN_STEP 5 |
| 878 | static const int ov7670_sin_table[] = { |
| 879 | 0, 87, 173, 258, 342, 422, |
| 880 | 499, 573, 642, 707, 766, 819, |
| 881 | 866, 906, 939, 965, 984, 996, |
| 882 | 1000 |
| 883 | }; |
| 884 | |
| 885 | static int ov7670_sine(int theta) |
| 886 | { |
| 887 | int chs = 1; |
| 888 | int sine; |
| 889 | |
| 890 | if (theta < 0) { |
| 891 | theta = -theta; |
| 892 | chs = -1; |
| 893 | } |
| 894 | if (theta <= 90) |
| 895 | sine = ov7670_sin_table[theta/SIN_STEP]; |
| 896 | else { |
| 897 | theta -= 90; |
| 898 | sine = 1000 - ov7670_sin_table[theta/SIN_STEP]; |
| 899 | } |
| 900 | return sine*chs; |
| 901 | } |
| 902 | |
| 903 | static int ov7670_cosine(int theta) |
| 904 | { |
| 905 | theta = 90 - theta; |
| 906 | if (theta > 180) |
| 907 | theta -= 360; |
| 908 | else if (theta < -180) |
| 909 | theta += 360; |
| 910 | return ov7670_sine(theta); |
| 911 | } |
| 912 | |
| 913 | |
| 914 | |
| 915 | |
| 916 | static void ov7670_calc_cmatrix(struct ov7670_info *info, |
| 917 | int matrix[CMATRIX_LEN]) |
| 918 | { |
| 919 | int i; |
| 920 | /* |
| 921 | * Apply the current saturation setting first. |
| 922 | */ |
| 923 | for (i = 0; i < CMATRIX_LEN; i++) |
| 924 | matrix[i] = (info->fmt->cmatrix[i]*info->sat) >> 7; |
| 925 | /* |
| 926 | * Then, if need be, rotate the hue value. |
| 927 | */ |
| 928 | if (info->hue != 0) { |
| 929 | int sinth, costh, tmpmatrix[CMATRIX_LEN]; |
| 930 | |
| 931 | memcpy(tmpmatrix, matrix, CMATRIX_LEN*sizeof(int)); |
| 932 | sinth = ov7670_sine(info->hue); |
| 933 | costh = ov7670_cosine(info->hue); |
| 934 | |
| 935 | matrix[0] = (matrix[3]*sinth + matrix[0]*costh)/1000; |
| 936 | matrix[1] = (matrix[4]*sinth + matrix[1]*costh)/1000; |
| 937 | matrix[2] = (matrix[5]*sinth + matrix[2]*costh)/1000; |
| 938 | matrix[3] = (matrix[3]*costh - matrix[0]*sinth)/1000; |
| 939 | matrix[4] = (matrix[4]*costh - matrix[1]*sinth)/1000; |
| 940 | matrix[5] = (matrix[5]*costh - matrix[2]*sinth)/1000; |
| 941 | } |
| 942 | } |
| 943 | |
| 944 | |
| 945 | |
| 946 | static int ov7670_t_sat(struct i2c_client *client, int value) |
| 947 | { |
| 948 | struct ov7670_info *info = i2c_get_clientdata(client); |
| 949 | int matrix[CMATRIX_LEN]; |
| 950 | int ret; |
| 951 | |
| 952 | info->sat = value; |
| 953 | ov7670_calc_cmatrix(info, matrix); |
| 954 | ret = ov7670_store_cmatrix(client, matrix); |
| 955 | return ret; |
| 956 | } |
| 957 | |
| 958 | static int ov7670_q_sat(struct i2c_client *client, __s32 *value) |
| 959 | { |
| 960 | struct ov7670_info *info = i2c_get_clientdata(client); |
| 961 | |
| 962 | *value = info->sat; |
| 963 | return 0; |
| 964 | } |
| 965 | |
| 966 | static int ov7670_t_hue(struct i2c_client *client, int value) |
| 967 | { |
| 968 | struct ov7670_info *info = i2c_get_clientdata(client); |
| 969 | int matrix[CMATRIX_LEN]; |
| 970 | int ret; |
| 971 | |
| 972 | if (value < -180 || value > 180) |
| 973 | return -EINVAL; |
| 974 | info->hue = value; |
| 975 | ov7670_calc_cmatrix(info, matrix); |
| 976 | ret = ov7670_store_cmatrix(client, matrix); |
| 977 | return ret; |
| 978 | } |
| 979 | |
| 980 | |
| 981 | static int ov7670_q_hue(struct i2c_client *client, __s32 *value) |
| 982 | { |
| 983 | struct ov7670_info *info = i2c_get_clientdata(client); |
| 984 | |
| 985 | *value = info->hue; |
| 986 | return 0; |
| 987 | } |
| 988 | |
| 989 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 990 | /* |
| 991 | * Some weird registers seem to store values in a sign/magnitude format! |
| 992 | */ |
| 993 | static unsigned char ov7670_sm_to_abs(unsigned char v) |
| 994 | { |
| 995 | if ((v & 0x80) == 0) |
| 996 | return v + 128; |
| 997 | else |
| 998 | return 128 - (v & 0x7f); |
| 999 | } |
| 1000 | |
| 1001 | |
| 1002 | static unsigned char ov7670_abs_to_sm(unsigned char v) |
| 1003 | { |
| 1004 | if (v > 127) |
| 1005 | return v & 0x7f; |
| 1006 | else |
| 1007 | return (128 - v) | 0x80; |
| 1008 | } |
| 1009 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1010 | static int ov7670_t_brightness(struct i2c_client *client, int value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1011 | { |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1012 | unsigned char com8, v; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1013 | int ret; |
| 1014 | |
| 1015 | ov7670_read(client, REG_COM8, &com8); |
| 1016 | com8 &= ~COM8_AEC; |
| 1017 | ov7670_write(client, REG_COM8, com8); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1018 | v = ov7670_abs_to_sm(value); |
| 1019 | ret = ov7670_write(client, REG_BRIGHT, v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1020 | return ret; |
| 1021 | } |
| 1022 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1023 | static int ov7670_q_brightness(struct i2c_client *client, __s32 *value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1024 | { |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1025 | unsigned char v; |
| 1026 | int ret = ov7670_read(client, REG_BRIGHT, &v); |
| 1027 | |
| 1028 | *value = ov7670_sm_to_abs(v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1029 | return ret; |
| 1030 | } |
| 1031 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1032 | static int ov7670_t_contrast(struct i2c_client *client, int value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1033 | { |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1034 | return ov7670_write(client, REG_CONTRAS, (unsigned char) value); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1035 | } |
| 1036 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1037 | static int ov7670_q_contrast(struct i2c_client *client, __s32 *value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1038 | { |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1039 | unsigned char v; |
| 1040 | int ret = ov7670_read(client, REG_CONTRAS, &v); |
| 1041 | |
| 1042 | *value = v; |
| 1043 | return ret; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1044 | } |
| 1045 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1046 | static int ov7670_q_hflip(struct i2c_client *client, __s32 *value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1047 | { |
| 1048 | int ret; |
| 1049 | unsigned char v; |
| 1050 | |
| 1051 | ret = ov7670_read(client, REG_MVFP, &v); |
| 1052 | *value = (v & MVFP_MIRROR) == MVFP_MIRROR; |
| 1053 | return ret; |
| 1054 | } |
| 1055 | |
| 1056 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1057 | static int ov7670_t_hflip(struct i2c_client *client, int value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1058 | { |
| 1059 | unsigned char v; |
| 1060 | int ret; |
| 1061 | |
| 1062 | ret = ov7670_read(client, REG_MVFP, &v); |
| 1063 | if (value) |
| 1064 | v |= MVFP_MIRROR; |
| 1065 | else |
| 1066 | v &= ~MVFP_MIRROR; |
| 1067 | msleep(10); /* FIXME */ |
| 1068 | ret += ov7670_write(client, REG_MVFP, v); |
| 1069 | return ret; |
| 1070 | } |
| 1071 | |
| 1072 | |
| 1073 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1074 | static int ov7670_q_vflip(struct i2c_client *client, __s32 *value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1075 | { |
| 1076 | int ret; |
| 1077 | unsigned char v; |
| 1078 | |
| 1079 | ret = ov7670_read(client, REG_MVFP, &v); |
| 1080 | *value = (v & MVFP_FLIP) == MVFP_FLIP; |
| 1081 | return ret; |
| 1082 | } |
| 1083 | |
| 1084 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1085 | static int ov7670_t_vflip(struct i2c_client *client, int value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1086 | { |
| 1087 | unsigned char v; |
| 1088 | int ret; |
| 1089 | |
| 1090 | ret = ov7670_read(client, REG_MVFP, &v); |
| 1091 | if (value) |
| 1092 | v |= MVFP_FLIP; |
| 1093 | else |
| 1094 | v &= ~MVFP_FLIP; |
| 1095 | msleep(10); /* FIXME */ |
| 1096 | ret += ov7670_write(client, REG_MVFP, v); |
| 1097 | return ret; |
| 1098 | } |
| 1099 | |
| 1100 | |
| 1101 | static struct ov7670_control { |
| 1102 | struct v4l2_queryctrl qc; |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1103 | int (*query)(struct i2c_client *c, __s32 *value); |
| 1104 | int (*tweak)(struct i2c_client *c, int value); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1105 | } ov7670_controls[] = |
| 1106 | { |
| 1107 | { |
| 1108 | .qc = { |
| 1109 | .id = V4L2_CID_BRIGHTNESS, |
| 1110 | .type = V4L2_CTRL_TYPE_INTEGER, |
| 1111 | .name = "Brightness", |
| 1112 | .minimum = 0, |
| 1113 | .maximum = 255, |
| 1114 | .step = 1, |
| 1115 | .default_value = 0x80, |
| 1116 | .flags = V4L2_CTRL_FLAG_SLIDER |
| 1117 | }, |
| 1118 | .tweak = ov7670_t_brightness, |
| 1119 | .query = ov7670_q_brightness, |
| 1120 | }, |
| 1121 | { |
| 1122 | .qc = { |
| 1123 | .id = V4L2_CID_CONTRAST, |
| 1124 | .type = V4L2_CTRL_TYPE_INTEGER, |
| 1125 | .name = "Contrast", |
| 1126 | .minimum = 0, |
| 1127 | .maximum = 127, |
| 1128 | .step = 1, |
| 1129 | .default_value = 0x40, /* XXX ov7670 spec */ |
| 1130 | .flags = V4L2_CTRL_FLAG_SLIDER |
| 1131 | }, |
| 1132 | .tweak = ov7670_t_contrast, |
| 1133 | .query = ov7670_q_contrast, |
| 1134 | }, |
| 1135 | { |
| 1136 | .qc = { |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1137 | .id = V4L2_CID_SATURATION, |
| 1138 | .type = V4L2_CTRL_TYPE_INTEGER, |
| 1139 | .name = "Saturation", |
| 1140 | .minimum = 0, |
| 1141 | .maximum = 256, |
| 1142 | .step = 1, |
| 1143 | .default_value = 0x80, |
| 1144 | .flags = V4L2_CTRL_FLAG_SLIDER |
| 1145 | }, |
| 1146 | .tweak = ov7670_t_sat, |
| 1147 | .query = ov7670_q_sat, |
| 1148 | }, |
| 1149 | { |
| 1150 | .qc = { |
| 1151 | .id = V4L2_CID_HUE, |
| 1152 | .type = V4L2_CTRL_TYPE_INTEGER, |
| 1153 | .name = "HUE", |
| 1154 | .minimum = -180, |
| 1155 | .maximum = 180, |
| 1156 | .step = 5, |
| 1157 | .default_value = 0, |
| 1158 | .flags = V4L2_CTRL_FLAG_SLIDER |
| 1159 | }, |
| 1160 | .tweak = ov7670_t_hue, |
| 1161 | .query = ov7670_q_hue, |
| 1162 | }, |
| 1163 | { |
| 1164 | .qc = { |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1165 | .id = V4L2_CID_VFLIP, |
| 1166 | .type = V4L2_CTRL_TYPE_BOOLEAN, |
| 1167 | .name = "Vertical flip", |
| 1168 | .minimum = 0, |
| 1169 | .maximum = 1, |
| 1170 | .step = 1, |
| 1171 | .default_value = 0, |
| 1172 | }, |
| 1173 | .tweak = ov7670_t_vflip, |
| 1174 | .query = ov7670_q_vflip, |
| 1175 | }, |
| 1176 | { |
| 1177 | .qc = { |
| 1178 | .id = V4L2_CID_HFLIP, |
| 1179 | .type = V4L2_CTRL_TYPE_BOOLEAN, |
| 1180 | .name = "Horizontal mirror", |
| 1181 | .minimum = 0, |
| 1182 | .maximum = 1, |
| 1183 | .step = 1, |
| 1184 | .default_value = 0, |
| 1185 | }, |
| 1186 | .tweak = ov7670_t_hflip, |
| 1187 | .query = ov7670_q_hflip, |
| 1188 | }, |
| 1189 | }; |
Robert P. J. Day | 0c71bf1 | 2007-06-05 05:20:56 -0300 | [diff] [blame] | 1190 | #define N_CONTROLS (ARRAY_SIZE(ov7670_controls)) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1191 | |
| 1192 | static struct ov7670_control *ov7670_find_control(__u32 id) |
| 1193 | { |
| 1194 | int i; |
| 1195 | |
| 1196 | for (i = 0; i < N_CONTROLS; i++) |
| 1197 | if (ov7670_controls[i].qc.id == id) |
| 1198 | return ov7670_controls + i; |
| 1199 | return NULL; |
| 1200 | } |
| 1201 | |
| 1202 | |
| 1203 | static int ov7670_queryctrl(struct i2c_client *client, |
| 1204 | struct v4l2_queryctrl *qc) |
| 1205 | { |
| 1206 | struct ov7670_control *ctrl = ov7670_find_control(qc->id); |
| 1207 | |
| 1208 | if (ctrl == NULL) |
| 1209 | return -EINVAL; |
| 1210 | *qc = ctrl->qc; |
| 1211 | return 0; |
| 1212 | } |
| 1213 | |
| 1214 | static int ov7670_g_ctrl(struct i2c_client *client, struct v4l2_control *ctrl) |
| 1215 | { |
| 1216 | struct ov7670_control *octrl = ov7670_find_control(ctrl->id); |
| 1217 | int ret; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1218 | |
| 1219 | if (octrl == NULL) |
| 1220 | return -EINVAL; |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1221 | ret = octrl->query(client, &ctrl->value); |
| 1222 | if (ret >= 0) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1223 | return 0; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1224 | return ret; |
| 1225 | } |
| 1226 | |
| 1227 | static int ov7670_s_ctrl(struct i2c_client *client, struct v4l2_control *ctrl) |
| 1228 | { |
| 1229 | struct ov7670_control *octrl = ov7670_find_control(ctrl->id); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1230 | int ret; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1231 | |
| 1232 | if (octrl == NULL) |
| 1233 | return -EINVAL; |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1234 | ret = octrl->tweak(client, ctrl->value); |
| 1235 | if (ret >= 0) |
| 1236 | return 0; |
| 1237 | return ret; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1238 | } |
| 1239 | |
| 1240 | |
| 1241 | |
| 1242 | |
| 1243 | |
| 1244 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1245 | /* |
| 1246 | * Basic i2c stuff. |
| 1247 | */ |
| 1248 | static struct i2c_driver ov7670_driver; |
| 1249 | |
| 1250 | static int ov7670_attach(struct i2c_adapter *adapter) |
| 1251 | { |
| 1252 | int ret; |
| 1253 | struct i2c_client *client; |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1254 | struct ov7670_info *info; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1255 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1256 | /* |
| 1257 | * For now: only deal with adapters we recognize. |
| 1258 | */ |
| 1259 | if (adapter->id != I2C_HW_SMBUS_CAFE) |
| 1260 | return -ENODEV; |
| 1261 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1262 | client = kzalloc(sizeof (struct i2c_client), GFP_KERNEL); |
| 1263 | if (! client) |
| 1264 | return -ENOMEM; |
| 1265 | client->adapter = adapter; |
| 1266 | client->addr = OV7670_I2C_ADDR; |
| 1267 | client->driver = &ov7670_driver, |
| 1268 | strcpy(client->name, "OV7670"); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1269 | /* |
| 1270 | * Set up our info structure. |
| 1271 | */ |
| 1272 | info = kzalloc(sizeof (struct ov7670_info), GFP_KERNEL); |
| 1273 | if (! info) { |
| 1274 | ret = -ENOMEM; |
| 1275 | goto out_free; |
| 1276 | } |
| 1277 | info->fmt = &ov7670_formats[0]; |
| 1278 | info->sat = 128; /* Review this */ |
| 1279 | i2c_set_clientdata(client, info); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1280 | |
| 1281 | /* |
| 1282 | * Make sure it's an ov7670 |
| 1283 | */ |
| 1284 | ret = ov7670_detect(client); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1285 | if (ret) |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1286 | goto out_free_info; |
Jonathan Corbet | edd75ed | 2007-05-22 00:39:00 -0300 | [diff] [blame] | 1287 | ret = i2c_attach_client(client); |
| 1288 | if (ret) |
| 1289 | goto out_free_info; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1290 | return 0; |
| 1291 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1292 | out_free_info: |
| 1293 | kfree(info); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1294 | out_free: |
| 1295 | kfree(client); |
| 1296 | return ret; |
| 1297 | } |
| 1298 | |
| 1299 | |
| 1300 | static int ov7670_detach(struct i2c_client *client) |
| 1301 | { |
| 1302 | i2c_detach_client(client); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1303 | kfree(i2c_get_clientdata(client)); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1304 | kfree(client); |
| 1305 | return 0; |
| 1306 | } |
| 1307 | |
| 1308 | |
| 1309 | static int ov7670_command(struct i2c_client *client, unsigned int cmd, |
| 1310 | void *arg) |
| 1311 | { |
| 1312 | switch (cmd) { |
Hans Verkuil | 3434eb7 | 2007-04-27 12:31:08 -0300 | [diff] [blame] | 1313 | case VIDIOC_G_CHIP_IDENT: |
| 1314 | return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_OV7670, 0); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1315 | |
| 1316 | case VIDIOC_INT_RESET: |
| 1317 | ov7670_reset(client); |
| 1318 | return 0; |
| 1319 | |
| 1320 | case VIDIOC_INT_INIT: |
| 1321 | return ov7670_init(client); |
| 1322 | |
| 1323 | case VIDIOC_ENUM_FMT: |
| 1324 | return ov7670_enum_fmt(client, (struct v4l2_fmtdesc *) arg); |
| 1325 | case VIDIOC_TRY_FMT: |
| 1326 | return ov7670_try_fmt(client, (struct v4l2_format *) arg, NULL, NULL); |
| 1327 | case VIDIOC_S_FMT: |
| 1328 | return ov7670_s_fmt(client, (struct v4l2_format *) arg); |
| 1329 | case VIDIOC_QUERYCTRL: |
| 1330 | return ov7670_queryctrl(client, (struct v4l2_queryctrl *) arg); |
| 1331 | case VIDIOC_S_CTRL: |
| 1332 | return ov7670_s_ctrl(client, (struct v4l2_control *) arg); |
| 1333 | case VIDIOC_G_CTRL: |
| 1334 | return ov7670_g_ctrl(client, (struct v4l2_control *) arg); |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 1335 | case VIDIOC_S_PARM: |
| 1336 | return ov7670_s_parm(client, (struct v4l2_streamparm *) arg); |
| 1337 | case VIDIOC_G_PARM: |
| 1338 | return ov7670_g_parm(client, (struct v4l2_streamparm *) arg); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1339 | } |
| 1340 | return -EINVAL; |
| 1341 | } |
| 1342 | |
| 1343 | |
| 1344 | |
| 1345 | static struct i2c_driver ov7670_driver = { |
| 1346 | .driver = { |
| 1347 | .name = "ov7670", |
| 1348 | }, |
| 1349 | .id = I2C_DRIVERID_OV7670, |
| 1350 | .class = I2C_CLASS_CAM_DIGITAL, |
| 1351 | .attach_adapter = ov7670_attach, |
| 1352 | .detach_client = ov7670_detach, |
| 1353 | .command = ov7670_command, |
| 1354 | }; |
| 1355 | |
| 1356 | |
| 1357 | /* |
| 1358 | * Module initialization |
| 1359 | */ |
| 1360 | static int __init ov7670_mod_init(void) |
| 1361 | { |
| 1362 | printk(KERN_NOTICE "OmniVision ov7670 sensor driver, at your service\n"); |
| 1363 | return i2c_add_driver(&ov7670_driver); |
| 1364 | } |
| 1365 | |
| 1366 | static void __exit ov7670_mod_exit(void) |
| 1367 | { |
| 1368 | i2c_del_driver(&ov7670_driver); |
| 1369 | } |
| 1370 | |
| 1371 | module_init(ov7670_mod_init); |
| 1372 | module_exit(ov7670_mod_exit); |