projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 111f3356 JC |
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 | * | |
| 8 | * This file may be distributed under the terms of the GNU General | |
| 9 | * Public License, version 2. | |
| 10 | */ | |
| 11 | #include <linux/init.h> | |
| 12 | #include <linux/module.h> | |
| 13 | #include <linux/moduleparam.h> | |
| 14 | #include <linux/slab.h> | |
| 15 | #include <linux/delay.h> | |
| 16 | #include <linux/videodev.h> | |
| 17 | #include <media/v4l2-common.h> | |
| 3434eb7e | 18 | #include <media/v4l2-chip-ident.h> |
| 111f3356 JC |
19 | #include <linux/i2c.h> |
| 20 | ||
| 21 | ||
| 5e614475 | 22 | MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>"); |
| 111f3356 JC |
23 | MODULE_DESCRIPTION("A low-level driver for OmniVision ov7670 sensors"); |
| 24 | MODULE_LICENSE("GPL"); | |
| 25 | ||
| 26 | /* | |
| 27 | * Basic window sizes. These probably belong somewhere more globally | |
| 28 | * useful. | |
| 29 | */ | |
| 30 | #define VGA_WIDTH 640 | |
| 31 | #define VGA_HEIGHT 480 | |
| 32 | #define QVGA_WIDTH 320 | |
| 33 | #define QVGA_HEIGHT 240 | |
| 34 | #define CIF_WIDTH 352 | |
| 35 | #define CIF_HEIGHT 288 | |
| 36 | #define QCIF_WIDTH 176 | |
| 37 | #define QCIF_HEIGHT 144 | |
| 38 | ||
| c8f5b2f5 JC |
39 | /* |
| 40 | * Our nominal (default) frame rate. | |
| 41 | */ | |
| 42 | #define OV7670_FRAME_RATE 30 | |
| 43 | ||
| 111f3356 JC |
44 | /* |
| 45 | * The 7670 sits on i2c with ID 0x42 | |
| 46 | */ | |
| 47 | #define OV7670_I2C_ADDR 0x42 | |
| 48 | ||
| 49 | /* Registers */ | |
| 50 | #define REG_GAIN 0x00 /* Gain lower 8 bits (rest in vref) */ | |
| 51 | #define REG_BLUE 0x01 /* blue gain */ | |
| 52 | #define REG_RED 0x02 /* red gain */ | |
| 53 | #define REG_VREF 0x03 /* Pieces of GAIN, VSTART, VSTOP */ | |
| 54 | #define REG_COM1 0x04 /* Control 1 */ | |
| 55 | #define COM1_CCIR656 0x40 /* CCIR656 enable */ | |
| 56 | #define REG_BAVE 0x05 /* U/B Average level */ | |
| 57 | #define REG_GbAVE 0x06 /* Y/Gb Average level */ | |
| 58 | #define REG_AECHH 0x07 /* AEC MS 5 bits */ | |
| 59 | #define REG_RAVE 0x08 /* V/R Average level */ | |
| 60 | #define REG_COM2 0x09 /* Control 2 */ | |
| 61 | #define COM2_SSLEEP 0x10 /* Soft sleep mode */ | |
| 62 | #define REG_PID 0x0a /* Product ID MSB */ | |
| 63 | #define REG_VER 0x0b /* Product ID LSB */ | |
| 64 | #define REG_COM3 0x0c /* Control 3 */ | |
| 65 | #define COM3_SWAP 0x40 /* Byte swap */ | |
| 66 | #define COM3_SCALEEN 0x08 /* Enable scaling */ | |
| 67 | #define COM3_DCWEN 0x04 /* Enable downsamp/crop/window */ | |
| 68 | #define REG_COM4 0x0d /* Control 4 */ | |
| 69 | #define REG_COM5 0x0e /* All "reserved" */ | |
| 70 | #define REG_COM6 0x0f /* Control 6 */ | |
| 71 | #define REG_AECH 0x10 /* More bits of AEC value */ | |
| 72 | #define REG_CLKRC 0x11 /* Clocl control */ | |
| 73 | #define CLK_EXT 0x40 /* Use external clock directly */ | |
| 74 | #define CLK_SCALE 0x3f /* Mask for internal clock scale */ | |
| 75 | #define REG_COM7 0x12 /* Control 7 */ | |
| 76 | #define COM7_RESET 0x80 /* Register reset */ | |
| 77 | #define COM7_FMT_MASK 0x38 | |
| 78 | #define COM7_FMT_VGA 0x00 | |
| 79 | #define COM7_FMT_CIF 0x20 /* CIF format */ | |
| 80 | #define COM7_FMT_QVGA 0x10 /* QVGA format */ | |
| 81 | #define COM7_FMT_QCIF 0x08 /* QCIF format */ | |
| 82 | #define COM7_RGB 0x04 /* bits 0 and 2 - RGB format */ | |
| 83 | #define COM7_YUV 0x00 /* YUV */ | |
| 84 | #define COM7_BAYER 0x01 /* Bayer format */ | |
| 85 | #define COM7_PBAYER 0x05 /* "Processed bayer" */ | |
| 86 | #define REG_COM8 0x13 /* Control 8 */ | |
| 87 | #define COM8_FASTAEC 0x80 /* Enable fast AGC/AEC */ | |
| 88 | #define COM8_AECSTEP 0x40 /* Unlimited AEC step size */ | |
| 89 | #define COM8_BFILT 0x20 /* Band filter enable */ | |
| 90 | #define COM8_AGC 0x04 /* Auto gain enable */ | |
| 91 | #define COM8_AWB 0x02 /* White balance enable */ | |
| 92 | #define COM8_AEC 0x01 /* Auto exposure enable */ | |
| 93 | #define REG_COM9 0x14 /* Control 9 - gain ceiling */ | |
| 94 | #define REG_COM10 0x15 /* Control 10 */ | |
| 95 | #define COM10_HSYNC 0x40 /* HSYNC instead of HREF */ | |
| 96 | #define COM10_PCLK_HB 0x20 /* Suppress PCLK on horiz blank */ | |
| 97 | #define COM10_HREF_REV 0x08 /* Reverse HREF */ | |
| 98 | #define COM10_VS_LEAD 0x04 /* VSYNC on clock leading edge */ | |
| 99 | #define COM10_VS_NEG 0x02 /* VSYNC negative */ | |
| 100 | #define COM10_HS_NEG 0x01 /* HSYNC negative */ | |
| 101 | #define REG_HSTART 0x17 /* Horiz start high bits */ | |
| 102 | #define REG_HSTOP 0x18 /* Horiz stop high bits */ | |
| 103 | #define REG_VSTART 0x19 /* Vert start high bits */ | |
| 104 | #define REG_VSTOP 0x1a /* Vert stop high bits */ | |
| 105 | #define REG_PSHFT 0x1b /* Pixel delay after HREF */ | |
| 106 | #define REG_MIDH 0x1c /* Manuf. ID high */ | |
| 107 | #define REG_MIDL 0x1d /* Manuf. ID low */ | |
| 108 | #define REG_MVFP 0x1e /* Mirror / vflip */ | |
| 109 | #define MVFP_MIRROR 0x20 /* Mirror image */ | |
| 110 | #define MVFP_FLIP 0x10 /* Vertical flip */ | |
| 111 | ||
| 112 | #define REG_AEW 0x24 /* AGC upper limit */ | |
| 113 | #define REG_AEB 0x25 /* AGC lower limit */ | |
| 114 | #define REG_VPT 0x26 /* AGC/AEC fast mode op region */ | |
| 115 | #define REG_HSYST 0x30 /* HSYNC rising edge delay */ | |
| 116 | #define REG_HSYEN 0x31 /* HSYNC falling edge delay */ | |
| 117 | #define REG_HREF 0x32 /* HREF pieces */ | |
| 118 | #define REG_TSLB 0x3a /* lots of stuff */ | |
| 119 | #define TSLB_YLAST 0x04 /* UYVY or VYUY - see com13 */ | |
| 120 | #define REG_COM11 0x3b /* Control 11 */ | |
| 121 | #define COM11_NIGHT 0x80 /* NIght mode enable */ | |
| 122 | #define COM11_NMFR 0x60 /* Two bit NM frame rate */ | |
| 123 | #define COM11_HZAUTO 0x10 /* Auto detect 50/60 Hz */ | |
| 124 | #define COM11_50HZ 0x08 /* Manual 50Hz select */ | |
| 125 | #define COM11_EXP 0x02 | |
| 126 | #define REG_COM12 0x3c /* Control 12 */ | |
| 127 | #define COM12_HREF 0x80 /* HREF always */ | |
| 128 | #define REG_COM13 0x3d /* Control 13 */ | |
| 129 | #define COM13_GAMMA 0x80 /* Gamma enable */ | |
| 130 | #define COM13_UVSAT 0x40 /* UV saturation auto adjustment */ | |
| 131 | #define COM13_UVSWAP 0x01 /* V before U - w/TSLB */ | |
| 132 | #define REG_COM14 0x3e /* Control 14 */ | |
| 133 | #define COM14_DCWEN 0x10 /* DCW/PCLK-scale enable */ | |
| 134 | #define REG_EDGE 0x3f /* Edge enhancement factor */ | |
| 135 | #define REG_COM15 0x40 /* Control 15 */ | |
| 136 | #define COM15_R10F0 0x00 /* Data range 10 to F0 */ | |
| 137 | #define COM15_R01FE 0x80 /* 01 to FE */ | |
| 138 | #define COM15_R00FF 0xc0 /* 00 to FF */ | |
| 139 | #define COM15_RGB565 0x10 /* RGB565 output */ | |
| 140 | #define COM15_RGB555 0x30 /* RGB555 output */ | |
| 141 | #define REG_COM16 0x41 /* Control 16 */ | |
| 142 | #define COM16_AWBGAIN 0x08 /* AWB gain enable */ | |
| 143 | #define REG_COM17 0x42 /* Control 17 */ | |
| 144 | #define COM17_AECWIN 0xc0 /* AEC window - must match COM4 */ | |
| 145 | #define COM17_CBAR 0x08 /* DSP Color bar */ | |
| 146 | ||
| f9a76156 JC |
147 | /* |
| 148 | * This matrix defines how the colors are generated, must be | |
| 149 | * tweaked to adjust hue and saturation. | |
| 150 | * | |
| 151 | * Order: v-red, v-green, v-blue, u-red, u-green, u-blue | |
| 152 | * | |
| 153 | * They are nine-bit signed quantities, with the sign bit | |
| 154 | * stored in 0x58. Sign for v-red is bit 0, and up from there. | |
| 155 | */ | |
| 156 | #define REG_CMATRIX_BASE 0x4f | |
| 157 | #define CMATRIX_LEN 6 | |
| 158 | #define REG_CMATRIX_SIGN 0x58 | |
| 159 | ||
| 160 | ||
| 111f3356 JC |
161 | #define REG_BRIGHT 0x55 /* Brightness */ |
| 162 | #define REG_CONTRAS 0x56 /* Contrast control */ | |
| 163 | ||
| 164 | #define REG_GFIX 0x69 /* Fix gain control */ | |
| 165 | ||
| 166 | #define REG_RGB444 0x8c /* RGB 444 control */ | |
| 167 | #define R444_ENABLE 0x02 /* Turn on RGB444, overrides 5x5 */ | |
| 168 | #define R444_RGBX 0x01 /* Empty nibble at end */ | |
| 169 | ||
| 170 | #define REG_HAECC1 0x9f /* Hist AEC/AGC control 1 */ | |
| 171 | #define REG_HAECC2 0xa0 /* Hist AEC/AGC control 2 */ | |
| 172 | ||
| 173 | #define REG_BD50MAX 0xa5 /* 50hz banding step limit */ | |
| 174 | #define REG_HAECC3 0xa6 /* Hist AEC/AGC control 3 */ | |
| 175 | #define REG_HAECC4 0xa7 /* Hist AEC/AGC control 4 */ | |
| 176 | #define REG_HAECC5 0xa8 /* Hist AEC/AGC control 5 */ | |
| 177 | #define REG_HAECC6 0xa9 /* Hist AEC/AGC control 6 */ | |
| 178 | #define REG_HAECC7 0xaa /* Hist AEC/AGC control 7 */ | |
| 179 | #define REG_BD60MAX 0xab /* 60hz banding step limit */ | |
| 180 | ||
| 181 | ||
| f9a76156 JC |
182 | /* |
| 183 | * Information we maintain about a known sensor. | |
| 184 | */ | |
| 185 | struct ov7670_format_struct; /* coming later */ | |
| 186 | struct ov7670_info { | |
| 187 | struct ov7670_format_struct *fmt; /* Current format */ | |
| 188 | unsigned char sat; /* Saturation value */ | |
| 189 | int hue; /* Hue value */ | |
| 190 | }; | |
| 191 | ||
| 192 | ||
| 193 | ||
| 194 | ||
| 111f3356 JC |
195 | /* |
| 196 | * The default register settings, as obtained from OmniVision. There | |
| 197 | * is really no making sense of most of these - lots of "reserved" values | |
| 198 | * and such. | |
| 199 | * | |
| 200 | * These settings give VGA YUYV. | |
| 201 | */ | |
| 202 | ||
| 203 | struct regval_list { | |
| 204 | unsigned char reg_num; | |
| 205 | unsigned char value; | |
| 206 | }; | |
| 207 | ||
| 208 | static struct regval_list ov7670_default_regs[] = { | |
| 209 | { REG_COM7, COM7_RESET }, | |
| 210 | /* | |
| 211 | * Clock scale: 3 = 15fps | |
| 212 | * 2 = 20fps | |
| 213 | * 1 = 30fps | |
| 214 | */ | |
| f9a76156 | 215 | { REG_CLKRC, 0x1 }, /* OV: clock scale (30 fps) */ |
| 111f3356 JC |
216 | { REG_TSLB, 0x04 }, /* OV */ |
| 217 | { REG_COM7, 0 }, /* VGA */ | |
| 218 | /* | |
| 219 | * Set the hardware window. These values from OV don't entirely | |
| 220 | * make sense - hstop is less than hstart. But they work... | |
| 221 | */ | |
| 222 | { REG_HSTART, 0x13 }, { REG_HSTOP, 0x01 }, | |
| 223 | { REG_HREF, 0xb6 }, { REG_VSTART, 0x02 }, | |
| 224 | { REG_VSTOP, 0x7a }, { REG_VREF, 0x0a }, | |
| 225 | ||
| 226 | { REG_COM3, 0 }, { REG_COM14, 0 }, | |
| 227 | /* Mystery scaling numbers */ | |
| 228 | { 0x70, 0x3a }, { 0x71, 0x35 }, | |
| 229 | { 0x72, 0x11 }, { 0x73, 0xf0 }, | |
| 230 | { 0xa2, 0x02 }, { REG_COM10, 0x0 }, | |
| 231 | ||
| 232 | /* Gamma curve values */ | |
| 233 | { 0x7a, 0x20 }, { 0x7b, 0x10 }, | |
| 234 | { 0x7c, 0x1e }, { 0x7d, 0x35 }, | |
| 235 | { 0x7e, 0x5a }, { 0x7f, 0x69 }, | |
| 236 | { 0x80, 0x76 }, { 0x81, 0x80 }, | |
| 237 | { 0x82, 0x88 }, { 0x83, 0x8f }, | |
| 238 | { 0x84, 0x96 }, { 0x85, 0xa3 }, | |
| 239 | { 0x86, 0xaf }, { 0x87, 0xc4 }, | |
| 240 | { 0x88, 0xd7 }, { 0x89, 0xe8 }, | |
| 241 | ||
| 242 | /* AGC and AEC parameters. Note we start by disabling those features, | |
| 243 | then turn them only after tweaking the values. */ | |
| 244 | { REG_COM8, COM8_FASTAEC | COM8_AECSTEP | COM8_BFILT }, | |
| 245 | { REG_GAIN, 0 }, { REG_AECH, 0 }, | |
| 246 | { REG_COM4, 0x40 }, /* magic reserved bit */ | |
| 247 | { REG_COM9, 0x18 }, /* 4x gain + magic rsvd bit */ | |
| 248 | { REG_BD50MAX, 0x05 }, { REG_BD60MAX, 0x07 }, | |
| 249 | { REG_AEW, 0x95 }, { REG_AEB, 0x33 }, | |
| 250 | { REG_VPT, 0xe3 }, { REG_HAECC1, 0x78 }, | |
| 251 | { REG_HAECC2, 0x68 }, { 0xa1, 0x03 }, /* magic */ | |
| 252 | { REG_HAECC3, 0xd8 }, { REG_HAECC4, 0xd8 }, | |
| 253 | { REG_HAECC5, 0xf0 }, { REG_HAECC6, 0x90 }, | |
| 254 | { REG_HAECC7, 0x94 }, | |
| 255 | { REG_COM8, COM8_FASTAEC|COM8_AECSTEP|COM8_BFILT|COM8_AGC|COM8_AEC }, | |
| 256 | ||
| 257 | /* Almost all of these are magic "reserved" values. */ | |
| 258 | { REG_COM5, 0x61 }, { REG_COM6, 0x4b }, | |
| 259 | { 0x16, 0x02 }, { REG_MVFP, 0x07|MVFP_MIRROR }, | |
| 260 | { 0x21, 0x02 }, { 0x22, 0x91 }, | |
| 261 | { 0x29, 0x07 }, { 0x33, 0x0b }, | |
| 262 | { 0x35, 0x0b }, { 0x37, 0x1d }, | |
| 263 | { 0x38, 0x71 }, { 0x39, 0x2a }, | |
| 264 | { REG_COM12, 0x78 }, { 0x4d, 0x40 }, | |
| 265 | { 0x4e, 0x20 }, { REG_GFIX, 0 }, | |
| 266 | { 0x6b, 0x4a }, { 0x74, 0x10 }, | |
| 267 | { 0x8d, 0x4f }, { 0x8e, 0 }, | |
| 268 | { 0x8f, 0 }, { 0x90, 0 }, | |
| 269 | { 0x91, 0 }, { 0x96, 0 }, | |
| 270 | { 0x9a, 0 }, { 0xb0, 0x84 }, | |
| 271 | { 0xb1, 0x0c }, { 0xb2, 0x0e }, | |
| 272 | { 0xb3, 0x82 }, { 0xb8, 0x0a }, | |
| 273 | ||
| 274 | /* More reserved magic, some of which tweaks white balance */ | |
| 275 | { 0x43, 0x0a }, { 0x44, 0xf0 }, | |
| 276 | { 0x45, 0x34 }, { 0x46, 0x58 }, | |
| 277 | { 0x47, 0x28 }, { 0x48, 0x3a }, | |
| 278 | { 0x59, 0x88 }, { 0x5a, 0x88 }, | |
| 279 | { 0x5b, 0x44 }, { 0x5c, 0x67 }, | |
| 280 | { 0x5d, 0x49 }, { 0x5e, 0x0e }, | |
| 281 | { 0x6c, 0x0a }, { 0x6d, 0x55 }, | |
| 282 | { 0x6e, 0x11 }, { 0x6f, 0x9f }, /* "9e for advance AWB" */ | |
| 283 | { 0x6a, 0x40 }, { REG_BLUE, 0x40 }, | |
| 284 | { REG_RED, 0x60 }, | |
| 285 | { REG_COM8, COM8_FASTAEC|COM8_AECSTEP|COM8_BFILT|COM8_AGC|COM8_AEC|COM8_AWB }, | |
| 286 | ||
| 287 | /* Matrix coefficients */ | |
| 288 | { 0x4f, 0x80 }, { 0x50, 0x80 }, | |
| 289 | { 0x51, 0 }, { 0x52, 0x22 }, | |
| 290 | { 0x53, 0x5e }, { 0x54, 0x80 }, | |
| 291 | { 0x58, 0x9e }, | |
| 292 | ||
| 293 | { REG_COM16, COM16_AWBGAIN }, { REG_EDGE, 0 }, | |
| 294 | { 0x75, 0x05 }, { 0x76, 0xe1 }, | |
| 295 | { 0x4c, 0 }, { 0x77, 0x01 }, | |
| 296 | { REG_COM13, 0xc3 }, { 0x4b, 0x09 }, | |
| 297 | { 0xc9, 0x60 }, { REG_COM16, 0x38 }, | |
| 298 | { 0x56, 0x40 }, | |
| 299 | ||
| c8f5b2f5 | 300 | { 0x34, 0x11 }, { REG_COM11, COM11_EXP|COM11_HZAUTO }, |
| 111f3356 JC |
301 | { 0xa4, 0x88 }, { 0x96, 0 }, |
| 302 | { 0x97, 0x30 }, { 0x98, 0x20 }, | |
| 303 | { 0x99, 0x30 }, { 0x9a, 0x84 }, | |
| 304 | { 0x9b, 0x29 }, { 0x9c, 0x03 }, | |
| 305 | { 0x9d, 0x4c }, { 0x9e, 0x3f }, | |
| 306 | { 0x78, 0x04 }, | |
| 307 | ||
| 308 | /* Extra-weird stuff. Some sort of multiplexor register */ | |
| 309 | { 0x79, 0x01 }, { 0xc8, 0xf0 }, | |
| 310 | { 0x79, 0x0f }, { 0xc8, 0x00 }, | |
| 311 | { 0x79, 0x10 }, { 0xc8, 0x7e }, | |
| 312 | { 0x79, 0x0a }, { 0xc8, 0x80 }, | |
| 313 | { 0x79, 0x0b }, { 0xc8, 0x01 }, | |
| 314 | { 0x79, 0x0c }, { 0xc8, 0x0f }, | |
| 315 | { 0x79, 0x0d }, { 0xc8, 0x20 }, | |
| 316 | { 0x79, 0x09 }, { 0xc8, 0x80 }, | |
| 317 | { 0x79, 0x02 }, { 0xc8, 0xc0 }, | |
| 318 | { 0x79, 0x03 }, { 0xc8, 0x40 }, | |
| 319 | { 0x79, 0x05 }, { 0xc8, 0x30 }, | |
| 320 | { 0x79, 0x26 }, | |
| 321 | ||
| 111f3356 JC |
322 | { 0xff, 0xff }, /* END MARKER */ |
| 323 | }; | |
| 324 | ||
| 325 | ||
| 326 | /* | |
| 327 | * Here we'll try to encapsulate the changes for just the output | |
| 328 | * video format. | |
| 329 | * | |
| 330 | * RGB656 and YUV422 come from OV; RGB444 is homebrewed. | |
| 331 | * | |
| 332 | * IMPORTANT RULE: the first entry must be for COM7, see ov7670_s_fmt for why. | |
| 333 | */ | |
| 334 | ||
| 335 | ||
| 336 | static struct regval_list ov7670_fmt_yuv422[] = { | |
| 337 | { REG_COM7, 0x0 }, /* Selects YUV mode */ | |
| 338 | { REG_RGB444, 0 }, /* No RGB444 please */ | |
| 339 | { REG_COM1, 0 }, | |
| 340 | { REG_COM15, COM15_R00FF }, | |
| 341 | { REG_COM9, 0x18 }, /* 4x gain ceiling; 0x8 is reserved bit */ | |
| 342 | { 0x4f, 0x80 }, /* "matrix coefficient 1" */ | |
| 343 | { 0x50, 0x80 }, /* "matrix coefficient 2" */ | |
| f9a76156 | 344 | { 0x51, 0 }, /* vb */ |
| 111f3356 JC |
345 | { 0x52, 0x22 }, /* "matrix coefficient 4" */ |
| 346 | { 0x53, 0x5e }, /* "matrix coefficient 5" */ | |
| 347 | { 0x54, 0x80 }, /* "matrix coefficient 6" */ | |
| 348 | { REG_COM13, COM13_GAMMA|COM13_UVSAT }, | |
| 349 | { 0xff, 0xff }, | |
| 350 | }; | |
| 351 | ||
| 352 | static struct regval_list ov7670_fmt_rgb565[] = { | |
| 353 | { REG_COM7, COM7_RGB }, /* Selects RGB mode */ | |
| 354 | { REG_RGB444, 0 }, /* No RGB444 please */ | |
| 355 | { REG_COM1, 0x0 }, | |
| 356 | { REG_COM15, COM15_RGB565 }, | |
| 357 | { REG_COM9, 0x38 }, /* 16x gain ceiling; 0x8 is reserved bit */ | |
| 358 | { 0x4f, 0xb3 }, /* "matrix coefficient 1" */ | |
| 359 | { 0x50, 0xb3 }, /* "matrix coefficient 2" */ | |
| f9a76156 | 360 | { 0x51, 0 }, /* vb */ |
| 111f3356 JC |
361 | { 0x52, 0x3d }, /* "matrix coefficient 4" */ |
| 362 | { 0x53, 0xa7 }, /* "matrix coefficient 5" */ | |
| 363 | { 0x54, 0xe4 }, /* "matrix coefficient 6" */ | |
| 364 | { REG_COM13, COM13_GAMMA|COM13_UVSAT }, | |
| 365 | { 0xff, 0xff }, | |
| 366 | }; | |
| 367 | ||
| 368 | static struct regval_list ov7670_fmt_rgb444[] = { | |
| 369 | { REG_COM7, COM7_RGB }, /* Selects RGB mode */ | |
| 370 | { REG_RGB444, R444_ENABLE }, /* Enable xxxxrrrr ggggbbbb */ | |
| 371 | { REG_COM1, 0x40 }, /* Magic reserved bit */ | |
| 372 | { REG_COM15, COM15_R01FE|COM15_RGB565 }, /* Data range needed? */ | |
| 373 | { REG_COM9, 0x38 }, /* 16x gain ceiling; 0x8 is reserved bit */ | |
| 374 | { 0x4f, 0xb3 }, /* "matrix coefficient 1" */ | |
| 375 | { 0x50, 0xb3 }, /* "matrix coefficient 2" */ | |
| f9a76156 | 376 | { 0x51, 0 }, /* vb */ |
| 111f3356 JC |
377 | { 0x52, 0x3d }, /* "matrix coefficient 4" */ |
| 378 | { 0x53, 0xa7 }, /* "matrix coefficient 5" */ | |
| 379 | { 0x54, 0xe4 }, /* "matrix coefficient 6" */ | |
| 380 | { REG_COM13, COM13_GAMMA|COM13_UVSAT|0x2 }, /* Magic rsvd bit */ | |
| 381 | { 0xff, 0xff }, | |
| 382 | }; | |
| 383 | ||
| 384 | ||
| 385 | ||
| 386 | ||
| 387 | /* | |
| 388 | * Low-level register I/O. | |
| 389 | */ | |
| 390 | ||
| 391 | static int ov7670_read(struct i2c_client *c, unsigned char reg, | |
| 392 | unsigned char *value) | |
| 393 | { | |
| 394 | int ret; | |
| 395 | ||
| 396 | ret = i2c_smbus_read_byte_data(c, reg); | |
| f9a76156 | 397 | if (ret >= 0) |
| 111f3356 JC |
398 | *value = (unsigned char) ret; |
| 399 | return ret; | |
| 400 | } | |
| 401 | ||
| 402 | ||
| 403 | static int ov7670_write(struct i2c_client *c, unsigned char reg, | |
| 404 | unsigned char value) | |
| 405 | { | |
| 406 | return i2c_smbus_write_byte_data(c, reg, value); | |
| 407 | } | |
| 408 | ||
| 409 | ||
| 410 | /* | |
| 411 | * Write a list of register settings; ff/ff stops the process. | |
| 412 | */ | |
| 413 | static int ov7670_write_array(struct i2c_client *c, struct regval_list *vals) | |
| 414 | { | |
| 415 | while (vals->reg_num != 0xff || vals->value != 0xff) { | |
| 416 | int ret = ov7670_write(c, vals->reg_num, vals->value); | |
| 417 | if (ret < 0) | |
| 418 | return ret; | |
| 419 | vals++; | |
| 420 | } | |
| 421 | return 0; | |
| 422 | } | |
| 423 | ||
| 424 | ||
| 425 | /* | |
| 426 | * Stuff that knows about the sensor. | |
| 427 | */ | |
| 428 | static void ov7670_reset(struct i2c_client *client) | |
| 429 | { | |
| 430 | ov7670_write(client, REG_COM7, COM7_RESET); | |
| 431 | msleep(1); | |
| 432 | } | |
| 433 | ||
| 434 | ||
| 435 | static int ov7670_init(struct i2c_client *client) | |
| 436 | { | |
| 437 | return ov7670_write_array(client, ov7670_default_regs); | |
| 438 | } | |
| 439 | ||
| 440 | ||
| 441 | ||
| 442 | static int ov7670_detect(struct i2c_client *client) | |
| 443 | { | |
| 444 | unsigned char v; | |
| 445 | int ret; | |
| 446 | ||
| 447 | ret = ov7670_init(client); | |
| 448 | if (ret < 0) | |
| 449 | return ret; | |
| 450 | ret = ov7670_read(client, REG_MIDH, &v); | |
| 451 | if (ret < 0) | |
| 452 | return ret; | |
| 453 | if (v != 0x7f) /* OV manuf. id. */ | |
| 454 | return -ENODEV; | |
| 455 | ret = ov7670_read(client, REG_MIDL, &v); | |
| 456 | if (ret < 0) | |
| 457 | return ret; | |
| 458 | if (v != 0xa2) | |
| 459 | return -ENODEV; | |
| 460 | /* | |
| 461 | * OK, we know we have an OmniVision chip...but which one? | |
| 462 | */ | |
| 463 | ret = ov7670_read(client, REG_PID, &v); | |
| 464 | if (ret < 0) | |
| 465 | return ret; | |
| 466 | if (v != 0x76) /* PID + VER = 0x76 / 0x73 */ | |
| 467 | return -ENODEV; | |
| 468 | ret = ov7670_read(client, REG_VER, &v); | |
| 469 | if (ret < 0) | |
| 470 | return ret; | |
| 471 | if (v != 0x73) /* PID + VER = 0x76 / 0x73 */ | |
| 472 | return -ENODEV; | |
| 473 | return 0; | |
| 474 | } | |
| 475 | ||
| 476 | ||
| f9a76156 JC |
477 | /* |
| 478 | * Store information about the video data format. The color matrix | |
| 479 | * is deeply tied into the format, so keep the relevant values here. | |
| 480 | * The magic matrix nubmers come from OmniVision. | |
| 481 | */ | |
| 111f3356 JC |
482 | static struct ov7670_format_struct { |
| 483 | __u8 *desc; | |
| 484 | __u32 pixelformat; | |
| 485 | struct regval_list *regs; | |
| f9a76156 | 486 | int cmatrix[CMATRIX_LEN]; |
| 111f3356 JC |
487 | } ov7670_formats[] = { |
| 488 | { | |
| 489 | .desc = "YUYV 4:2:2", | |
| 490 | .pixelformat = V4L2_PIX_FMT_YUYV, | |
| 491 | .regs = ov7670_fmt_yuv422, | |
| f9a76156 | 492 | .cmatrix = { 128, -128, 0, -34, -94, 128 }, |
| 111f3356 JC |
493 | }, |
| 494 | { | |
| 495 | .desc = "RGB 444", | |
| 496 | .pixelformat = V4L2_PIX_FMT_RGB444, | |
| 497 | .regs = ov7670_fmt_rgb444, | |
| f9a76156 | 498 | .cmatrix = { 179, -179, 0, -61, -176, 228 }, |
| 111f3356 JC |
499 | }, |
| 500 | { | |
| 501 | .desc = "RGB 565", | |
| 502 | .pixelformat = V4L2_PIX_FMT_RGB565, | |
| 503 | .regs = ov7670_fmt_rgb565, | |
| f9a76156 | 504 | .cmatrix = { 179, -179, 0, -61, -176, 228 }, |
| 111f3356 | 505 | }, |
| 111f3356 JC |
506 | }; |
| 507 | #define N_OV7670_FMTS (sizeof(ov7670_formats)/sizeof(ov7670_formats[0])) | |
| 508 | ||
| 509 | /* | |
| 510 | * All formats we support are 2 bytes/pixel. | |
| 511 | */ | |
| 512 | #define BYTES_PER_PIXEL 2 | |
| 513 | ||
| 514 | /* | |
| 515 | * Then there is the issue of window sizes. Try to capture the info here. | |
| 516 | */ | |
| f9a76156 JC |
517 | |
| 518 | /* | |
| 519 | * QCIF mode is done (by OV) in a very strange way - it actually looks like | |
| 520 | * VGA with weird scaling options - they do *not* use the canned QCIF mode | |
| 521 | * which is allegedly provided by the sensor. So here's the weird register | |
| 522 | * settings. | |
| 523 | */ | |
| 524 | static struct regval_list ov7670_qcif_regs[] = { | |
| 525 | { REG_COM3, COM3_SCALEEN|COM3_DCWEN }, | |
| 526 | { REG_COM3, COM3_DCWEN }, | |
| 527 | { REG_COM14, COM14_DCWEN | 0x01}, | |
| 528 | { 0x73, 0xf1 }, | |
| 529 | { 0xa2, 0x52 }, | |
| 530 | { 0x7b, 0x1c }, | |
| 531 | { 0x7c, 0x28 }, | |
| 532 | { 0x7d, 0x3c }, | |
| 533 | { 0x7f, 0x69 }, | |
| 534 | { REG_COM9, 0x38 }, | |
| 535 | { 0xa1, 0x0b }, | |
| 536 | { 0x74, 0x19 }, | |
| 537 | { 0x9a, 0x80 }, | |
| 538 | { 0x43, 0x14 }, | |
| 539 | { REG_COM13, 0xc0 }, | |
| 540 | { 0xff, 0xff }, | |
| 541 | }; | |
| 542 | ||
| 111f3356 JC |
543 | static struct ov7670_win_size { |
| 544 | int width; | |
| 545 | int height; | |
| 546 | unsigned char com7_bit; | |
| 547 | int hstart; /* Start/stop values for the camera. Note */ | |
| 548 | int hstop; /* that they do not always make complete */ | |
| 549 | int vstart; /* sense to humans, but evidently the sensor */ | |
| 550 | int vstop; /* will do the right thing... */ | |
| f9a76156 | 551 | struct regval_list *regs; /* Regs to tweak */ |
| 111f3356 JC |
552 | /* h/vref stuff */ |
| 553 | } ov7670_win_sizes[] = { | |
| 554 | /* VGA */ | |
| 555 | { | |
| 556 | .width = VGA_WIDTH, | |
| 557 | .height = VGA_HEIGHT, | |
| 558 | .com7_bit = COM7_FMT_VGA, | |
| 559 | .hstart = 158, /* These values from */ | |
| 560 | .hstop = 14, /* Omnivision */ | |
| 561 | .vstart = 10, | |
| 562 | .vstop = 490, | |
| f9a76156 | 563 | .regs = NULL, |
| 111f3356 JC |
564 | }, |
| 565 | /* CIF */ | |
| 566 | { | |
| 567 | .width = CIF_WIDTH, | |
| 568 | .height = CIF_HEIGHT, | |
| 569 | .com7_bit = COM7_FMT_CIF, | |
| 570 | .hstart = 170, /* Empirically determined */ | |
| 571 | .hstop = 90, | |
| 572 | .vstart = 14, | |
| 573 | .vstop = 494, | |
| f9a76156 | 574 | .regs = NULL, |
| 111f3356 JC |
575 | }, |
| 576 | /* QVGA */ | |
| 577 | { | |
| 578 | .width = QVGA_WIDTH, | |
| 579 | .height = QVGA_HEIGHT, | |
| 580 | .com7_bit = COM7_FMT_QVGA, | |
| 581 | .hstart = 164, /* Empirically determined */ | |
| 582 | .hstop = 20, | |
| 583 | .vstart = 14, | |
| 584 | .vstop = 494, | |
| f9a76156 JC |
585 | .regs = NULL, |
| 586 | }, | |
| 587 | /* QCIF */ | |
| 588 | { | |
| 589 | .width = QCIF_WIDTH, | |
| 590 | .height = QCIF_HEIGHT, | |
| 591 | .com7_bit = COM7_FMT_VGA, /* see comment above */ | |
| 592 | .hstart = 456, /* Empirically determined */ | |
| 593 | .hstop = 24, | |
| 594 | .vstart = 14, | |
| 595 | .vstop = 494, | |
| 596 | .regs = ov7670_qcif_regs, | |
| 111f3356 JC |
597 | }, |
| 598 | }; | |
| 599 | ||
| 600 | #define N_WIN_SIZES (sizeof(ov7670_win_sizes)/sizeof(ov7670_win_sizes[0])) | |
| 601 | ||
| 602 | ||
| 603 | /* | |
| 604 | * Store a set of start/stop values into the camera. | |
| 605 | */ | |
| 606 | static int ov7670_set_hw(struct i2c_client *client, int hstart, int hstop, | |
| 607 | int vstart, int vstop) | |
| 608 | { | |
| 609 | int ret; | |
| 610 | unsigned char v; | |
| 611 | /* | |
| 612 | * Horizontal: 11 bits, top 8 live in hstart and hstop. Bottom 3 of | |
| 613 | * hstart are in href[2:0], bottom 3 of hstop in href[5:3]. There is | |
| 614 | * a mystery "edge offset" value in the top two bits of href. | |
| 615 | */ | |
| 616 | ret = ov7670_write(client, REG_HSTART, (hstart >> 3) & 0xff); | |
| 617 | ret += ov7670_write(client, REG_HSTOP, (hstop >> 3) & 0xff); | |
| 618 | ret += ov7670_read(client, REG_HREF, &v); | |
| 619 | v = (v & 0xc0) | ((hstop & 0x7) << 3) | (hstart & 0x7); | |
| 620 | msleep(10); | |
| 621 | ret += ov7670_write(client, REG_HREF, v); | |
| 622 | /* | |
| 623 | * Vertical: similar arrangement, but only 10 bits. | |
| 624 | */ | |
| 625 | ret += ov7670_write(client, REG_VSTART, (vstart >> 2) & 0xff); | |
| 626 | ret += ov7670_write(client, REG_VSTOP, (vstop >> 2) & 0xff); | |
| 627 | ret += ov7670_read(client, REG_VREF, &v); | |
| 628 | v = (v & 0xf0) | ((vstop & 0x3) << 2) | (vstart & 0x3); | |
| 629 | msleep(10); | |
| 630 | ret += ov7670_write(client, REG_VREF, v); | |
| 631 | return ret; | |
| 632 | } | |
| 633 | ||
| 634 | ||
| 635 | static int ov7670_enum_fmt(struct i2c_client *c, struct v4l2_fmtdesc *fmt) | |
| 636 | { | |
| 637 | struct ov7670_format_struct *ofmt; | |
| 638 | ||
| 639 | if (fmt->index >= N_OV7670_FMTS) | |
| 640 | return -EINVAL; | |
| 641 | ||
| 642 | ofmt = ov7670_formats + fmt->index; | |
| 643 | fmt->flags = 0; | |
| 644 | strcpy(fmt->description, ofmt->desc); | |
| 645 | fmt->pixelformat = ofmt->pixelformat; | |
| 646 | return 0; | |
| 647 | } | |
| 648 | ||
| 649 | ||
| 650 | static int ov7670_try_fmt(struct i2c_client *c, struct v4l2_format *fmt, | |
| 651 | struct ov7670_format_struct **ret_fmt, | |
| 652 | struct ov7670_win_size **ret_wsize) | |
| 653 | { | |
| 654 | int index; | |
| 655 | struct ov7670_win_size *wsize; | |
| 656 | struct v4l2_pix_format *pix = &fmt->fmt.pix; | |
| 657 | ||
| 658 | for (index = 0; index < N_OV7670_FMTS; index++) | |
| 659 | if (ov7670_formats[index].pixelformat == pix->pixelformat) | |
| 660 | break; | |
| 661 | if (index >= N_OV7670_FMTS) | |
| 662 | return -EINVAL; | |
| 663 | if (ret_fmt != NULL) | |
| 664 | *ret_fmt = ov7670_formats + index; | |
| 665 | /* | |
| 666 | * Fields: the OV devices claim to be progressive. | |
| 667 | */ | |
| 668 | if (pix->field == V4L2_FIELD_ANY) | |
| 669 | pix->field = V4L2_FIELD_NONE; | |
| 670 | else if (pix->field != V4L2_FIELD_NONE) | |
| 671 | return -EINVAL; | |
| 672 | /* | |
| 673 | * Round requested image size down to the nearest | |
| 674 | * we support, but not below the smallest. | |
| 675 | */ | |
| 676 | for (wsize = ov7670_win_sizes; wsize < ov7670_win_sizes + N_WIN_SIZES; | |
| 677 | wsize++) | |
| 678 | if (pix->width >= wsize->width && pix->height >= wsize->height) | |
| 679 | break; | |
| f9a76156 | 680 | if (wsize >= ov7670_win_sizes + N_WIN_SIZES) |
| 111f3356 JC |
681 | wsize--; /* Take the smallest one */ |
| 682 | if (ret_wsize != NULL) | |
| 683 | *ret_wsize = wsize; | |
| 684 | /* | |
| 685 | * Note the size we'll actually handle. | |
| 686 | */ | |
| 687 | pix->width = wsize->width; | |
| 688 | pix->height = wsize->height; | |
| 689 | pix->bytesperline = pix->width*BYTES_PER_PIXEL; | |
| 111f3356 JC |
690 | pix->sizeimage = pix->height*pix->bytesperline; |
| 691 | return 0; | |
| 111f3356 JC |
692 | } |
| 693 | ||
| 694 | /* | |
| 695 | * Set a format. | |
| 696 | */ | |
| 697 | static int ov7670_s_fmt(struct i2c_client *c, struct v4l2_format *fmt) | |
| 698 | { | |
| 699 | int ret; | |
| 700 | struct ov7670_format_struct *ovfmt; | |
| 701 | struct ov7670_win_size *wsize; | |
| f9a76156 | 702 | struct ov7670_info *info = i2c_get_clientdata(c); |
| 111f3356 JC |
703 | unsigned char com7; |
| 704 | ||
| 705 | ret = ov7670_try_fmt(c, fmt, &ovfmt, &wsize); | |
| 706 | if (ret) | |
| 707 | return ret; | |
| 708 | /* | |
| 709 | * COM7 is a pain in the ass, it doesn't like to be read then | |
| 710 | * quickly written afterward. But we have everything we need | |
| 711 | * to set it absolutely here, as long as the format-specific | |
| 712 | * register sets list it first. | |
| 713 | */ | |
| 714 | com7 = ovfmt->regs[0].value; | |
| 715 | com7 |= wsize->com7_bit; | |
| 716 | ov7670_write(c, REG_COM7, com7); | |
| 717 | /* | |
| 718 | * Now write the rest of the array. Also store start/stops | |
| 719 | */ | |
| 720 | ov7670_write_array(c, ovfmt->regs + 1); | |
| 721 | ov7670_set_hw(c, wsize->hstart, wsize->hstop, wsize->vstart, | |
| 722 | wsize->vstop); | |
| f9a76156 JC |
723 | ret = 0; |
| 724 | if (wsize->regs) | |
| 725 | ret = ov7670_write_array(c, wsize->regs); | |
| 726 | info->fmt = ovfmt; | |
| 111f3356 JC |
727 | return 0; |
| 728 | } | |
| 729 | ||
| c8f5b2f5 JC |
730 | /* |
| 731 | * Implement G/S_PARM. There is a "high quality" mode we could try | |
| 732 | * to do someday; for now, we just do the frame rate tweak. | |
| 733 | */ | |
| 734 | static int ov7670_g_parm(struct i2c_client *c, struct v4l2_streamparm *parms) | |
| 735 | { | |
| 736 | struct v4l2_captureparm *cp = &parms->parm.capture; | |
| 737 | unsigned char clkrc; | |
| 738 | int ret; | |
| 739 | ||
| 740 | if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
| 741 | return -EINVAL; | |
| 742 | ret = ov7670_read(c, REG_CLKRC, &clkrc); | |
| 743 | if (ret < 0) | |
| 744 | return ret; | |
| 745 | memset(cp, 0, sizeof(struct v4l2_captureparm)); | |
| 746 | cp->capability = V4L2_CAP_TIMEPERFRAME; | |
| 747 | cp->timeperframe.numerator = 1; | |
| 748 | cp->timeperframe.denominator = OV7670_FRAME_RATE; | |
| 749 | if ((clkrc & CLK_EXT) == 0 && (clkrc & CLK_SCALE) > 1) | |
| 750 | cp->timeperframe.denominator /= (clkrc & CLK_SCALE); | |
| 751 | return 0; | |
| 752 | } | |
| 753 | ||
| 754 | static int ov7670_s_parm(struct i2c_client *c, struct v4l2_streamparm *parms) | |
| 755 | { | |
| 756 | struct v4l2_captureparm *cp = &parms->parm.capture; | |
| 757 | struct v4l2_fract *tpf = &cp->timeperframe; | |
| 758 | unsigned char clkrc; | |
| 759 | int ret, div; | |
| 760 | ||
| 761 | if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
| 762 | return -EINVAL; | |
| 763 | if (cp->extendedmode != 0) | |
| 764 | return -EINVAL; | |
| 765 | /* | |
| 766 | * CLKRC has a reserved bit, so let's preserve it. | |
| 767 | */ | |
| 768 | ret = ov7670_read(c, REG_CLKRC, &clkrc); | |
| 769 | if (ret < 0) | |
| 770 | return ret; | |
| 771 | if (tpf->numerator == 0 || tpf->denominator == 0) | |
| 772 | div = 1; /* Reset to full rate */ | |
| 773 | else | |
| 774 | div = (tpf->numerator*OV7670_FRAME_RATE)/tpf->denominator; | |
| 775 | if (div == 0) | |
| 776 | div = 1; | |
| 777 | else if (div > CLK_SCALE) | |
| 778 | div = CLK_SCALE; | |
| 779 | clkrc = (clkrc & 0x80) | div; | |
| 780 | tpf->numerator = 1; | |
| 781 | tpf->denominator = OV7670_FRAME_RATE/div; | |
| 782 | return ov7670_write(c, REG_CLKRC, clkrc); | |
| 783 | } | |
| 784 | ||
| 785 | ||
| 786 | ||
| 111f3356 JC |
787 | /* |
| 788 | * Code for dealing with controls. | |
| 789 | */ | |
| 790 | ||
| f9a76156 JC |
791 | |
| 792 | ||
| 793 | ||
| 794 | ||
| 795 | static int ov7670_store_cmatrix(struct i2c_client *client, | |
| 796 | int matrix[CMATRIX_LEN]) | |
| 797 | { | |
| 798 | int i, ret; | |
| 799 | unsigned char signbits; | |
| 800 | ||
| 801 | /* | |
| 802 | * Weird crap seems to exist in the upper part of | |
| 803 | * the sign bits register, so let's preserve it. | |
| 804 | */ | |
| 805 | ret = ov7670_read(client, REG_CMATRIX_SIGN, &signbits); | |
| 806 | signbits &= 0xc0; | |
| 807 | ||
| 808 | for (i = 0; i < CMATRIX_LEN; i++) { | |
| 809 | unsigned char raw; | |
| 810 | ||
| 811 | if (matrix[i] < 0) { | |
| 812 | signbits |= (1 << i); | |
| 813 | if (matrix[i] < -255) | |
| 814 | raw = 0xff; | |
| 815 | else | |
| 816 | raw = (-1 * matrix[i]) & 0xff; | |
| 817 | } | |
| 818 | else { | |
| 819 | if (matrix[i] > 255) | |
| 820 | raw = 0xff; | |
| 821 | else | |
| 822 | raw = matrix[i] & 0xff; | |
| 823 | } | |
| 824 | ret += ov7670_write(client, REG_CMATRIX_BASE + i, raw); | |
| 825 | } | |
| 826 | ret += ov7670_write(client, REG_CMATRIX_SIGN, signbits); | |
| 827 | return ret; | |
| 828 | } | |
| 829 | ||
| 830 | ||
| 831 | /* | |
| 832 | * Hue also requires messing with the color matrix. It also requires | |
| 833 | * trig functions, which tend not to be well supported in the kernel. | |
| 834 | * So here is a simple table of sine values, 0-90 degrees, in steps | |
| 835 | * of five degrees. Values are multiplied by 1000. | |
| 836 | * | |
| 837 | * The following naive approximate trig functions require an argument | |
| 838 | * carefully limited to -180 <= theta <= 180. | |
| 839 | */ | |
| 840 | #define SIN_STEP 5 | |
| 841 | static const int ov7670_sin_table[] = { | |
| 842 | 0, 87, 173, 258, 342, 422, | |
| 843 | 499, 573, 642, 707, 766, 819, | |
| 844 | 866, 906, 939, 965, 984, 996, | |
| 845 | 1000 | |
| 846 | }; | |
| 847 | ||
| 848 | static int ov7670_sine(int theta) | |
| 849 | { | |
| 850 | int chs = 1; | |
| 851 | int sine; | |
| 852 | ||
| 853 | if (theta < 0) { | |
| 854 | theta = -theta; | |
| 855 | chs = -1; | |
| 856 | } | |
| 857 | if (theta <= 90) | |
| 858 | sine = ov7670_sin_table[theta/SIN_STEP]; | |
| 859 | else { | |
| 860 | theta -= 90; | |
| 861 | sine = 1000 - ov7670_sin_table[theta/SIN_STEP]; | |
| 862 | } | |
| 863 | return sine*chs; | |
| 864 | } | |
| 865 | ||
| 866 | static int ov7670_cosine(int theta) | |
| 867 | { | |
| 868 | theta = 90 - theta; | |
| 869 | if (theta > 180) | |
| 870 | theta -= 360; | |
| 871 | else if (theta < -180) | |
| 872 | theta += 360; | |
| 873 | return ov7670_sine(theta); | |
| 874 | } | |
| 875 | ||
| 876 | ||
| 877 | ||
| 878 | ||
| 879 | static void ov7670_calc_cmatrix(struct ov7670_info *info, | |
| 880 | int matrix[CMATRIX_LEN]) | |
| 881 | { | |
| 882 | int i; | |
| 883 | /* | |
| 884 | * Apply the current saturation setting first. | |
| 885 | */ | |
| 886 | for (i = 0; i < CMATRIX_LEN; i++) | |
| 887 | matrix[i] = (info->fmt->cmatrix[i]*info->sat) >> 7; | |
| 888 | /* | |
| 889 | * Then, if need be, rotate the hue value. | |
| 890 | */ | |
| 891 | if (info->hue != 0) { | |
| 892 | int sinth, costh, tmpmatrix[CMATRIX_LEN]; | |
| 893 | ||
| 894 | memcpy(tmpmatrix, matrix, CMATRIX_LEN*sizeof(int)); | |
| 895 | sinth = ov7670_sine(info->hue); | |
| 896 | costh = ov7670_cosine(info->hue); | |
| 897 | ||
| 898 | matrix[0] = (matrix[3]*sinth + matrix[0]*costh)/1000; | |
| 899 | matrix[1] = (matrix[4]*sinth + matrix[1]*costh)/1000; | |
| 900 | matrix[2] = (matrix[5]*sinth + matrix[2]*costh)/1000; | |
| 901 | matrix[3] = (matrix[3]*costh - matrix[0]*sinth)/1000; | |
| 902 | matrix[4] = (matrix[4]*costh - matrix[1]*sinth)/1000; | |
| 903 | matrix[5] = (matrix[5]*costh - matrix[2]*sinth)/1000; | |
| 904 | } | |
| 905 | } | |
| 906 | ||
| 907 | ||
| 908 | ||
| 909 | static int ov7670_t_sat(struct i2c_client *client, int value) | |
| 910 | { | |
| 911 | struct ov7670_info *info = i2c_get_clientdata(client); | |
| 912 | int matrix[CMATRIX_LEN]; | |
| 913 | int ret; | |
| 914 | ||
| 915 | info->sat = value; | |
| 916 | ov7670_calc_cmatrix(info, matrix); | |
| 917 | ret = ov7670_store_cmatrix(client, matrix); | |
| 918 | return ret; | |
| 919 | } | |
| 920 | ||
| 921 | static int ov7670_q_sat(struct i2c_client *client, __s32 *value) | |
| 922 | { | |
| 923 | struct ov7670_info *info = i2c_get_clientdata(client); | |
| 924 | ||
| 925 | *value = info->sat; | |
| 926 | return 0; | |
| 927 | } | |
| 928 | ||
| 929 | static int ov7670_t_hue(struct i2c_client *client, int value) | |
| 930 | { | |
| 931 | struct ov7670_info *info = i2c_get_clientdata(client); | |
| 932 | int matrix[CMATRIX_LEN]; | |
| 933 | int ret; | |
| 934 | ||
| 935 | if (value < -180 || value > 180) | |
| 936 | return -EINVAL; | |
| 937 | info->hue = value; | |
| 938 | ov7670_calc_cmatrix(info, matrix); | |
| 939 | ret = ov7670_store_cmatrix(client, matrix); | |
| 940 | return ret; | |
| 941 | } | |
| 942 | ||
| 943 | ||
| 944 | static int ov7670_q_hue(struct i2c_client *client, __s32 *value) | |
| 945 | { | |
| 946 | struct ov7670_info *info = i2c_get_clientdata(client); | |
| 947 | ||
| 948 | *value = info->hue; | |
| 949 | return 0; | |
| 950 | } | |
| 951 | ||
| 952 | ||
| 111f3356 JC |
953 | /* |
| 954 | * Some weird registers seem to store values in a sign/magnitude format! | |
| 955 | */ | |
| 956 | static unsigned char ov7670_sm_to_abs(unsigned char v) | |
| 957 | { | |
| 958 | if ((v & 0x80) == 0) | |
| 959 | return v + 128; | |
| 960 | else | |
| 961 | return 128 - (v & 0x7f); | |
| 962 | } | |
| 963 | ||
| 964 | ||
| 965 | static unsigned char ov7670_abs_to_sm(unsigned char v) | |
| 966 | { | |
| 967 | if (v > 127) | |
| 968 | return v & 0x7f; | |
| 969 | else | |
| 970 | return (128 - v) | 0x80; | |
| 971 | } | |
| 972 | ||
| f9a76156 | 973 | static int ov7670_t_brightness(struct i2c_client *client, int value) |
| 111f3356 | 974 | { |
| f9a76156 | 975 | unsigned char com8, v; |
| 111f3356 JC |
976 | int ret; |
| 977 | ||
| 978 | ov7670_read(client, REG_COM8, &com8); | |
| 979 | com8 &= ~COM8_AEC; | |
| 980 | ov7670_write(client, REG_COM8, com8); | |
| f9a76156 JC |
981 | v = ov7670_abs_to_sm(value); |
| 982 | ret = ov7670_write(client, REG_BRIGHT, v); | |
| 111f3356 JC |
983 | return ret; |
| 984 | } | |
| 985 | ||
| f9a76156 | 986 | static int ov7670_q_brightness(struct i2c_client *client, __s32 *value) |
| 111f3356 | 987 | { |
| f9a76156 JC |
988 | unsigned char v; |
| 989 | int ret = ov7670_read(client, REG_BRIGHT, &v); | |
| 990 | ||
| 991 | *value = ov7670_sm_to_abs(v); | |
| 111f3356 JC |
992 | return ret; |
| 993 | } | |
| 994 | ||
| f9a76156 | 995 | static int ov7670_t_contrast(struct i2c_client *client, int value) |
| 111f3356 | 996 | { |
| f9a76156 | 997 | return ov7670_write(client, REG_CONTRAS, (unsigned char) value); |
| 111f3356 JC |
998 | } |
| 999 | ||
| f9a76156 | 1000 | static int ov7670_q_contrast(struct i2c_client *client, __s32 *value) |
| 111f3356 | 1001 | { |
| f9a76156 JC |
1002 | unsigned char v; |
| 1003 | int ret = ov7670_read(client, REG_CONTRAS, &v); | |
| 1004 | ||
| 1005 | *value = v; | |
| 1006 | return ret; | |
| 111f3356 JC |
1007 | } |
| 1008 | ||
| f9a76156 | 1009 | static int ov7670_q_hflip(struct i2c_client *client, __s32 *value) |
| 111f3356 JC |
1010 | { |
| 1011 | int ret; | |
| 1012 | unsigned char v; | |
| 1013 | ||
| 1014 | ret = ov7670_read(client, REG_MVFP, &v); | |
| 1015 | *value = (v & MVFP_MIRROR) == MVFP_MIRROR; | |
| 1016 | return ret; | |
| 1017 | } | |
| 1018 | ||
| 1019 | ||
| f9a76156 | 1020 | static int ov7670_t_hflip(struct i2c_client *client, int value) |
| 111f3356 JC |
1021 | { |
| 1022 | unsigned char v; | |
| 1023 | int ret; | |
| 1024 | ||
| 1025 | ret = ov7670_read(client, REG_MVFP, &v); | |
| 1026 | if (value) | |
| 1027 | v |= MVFP_MIRROR; | |
| 1028 | else | |
| 1029 | v &= ~MVFP_MIRROR; | |
| 1030 | msleep(10); /* FIXME */ | |
| 1031 | ret += ov7670_write(client, REG_MVFP, v); | |
| 1032 | return ret; | |
| 1033 | } | |
| 1034 | ||
| 1035 | ||
| 1036 | ||
| f9a76156 | 1037 | static int ov7670_q_vflip(struct i2c_client *client, __s32 *value) |
| 111f3356 JC |
1038 | { |
| 1039 | int ret; | |
| 1040 | unsigned char v; | |
| 1041 | ||
| 1042 | ret = ov7670_read(client, REG_MVFP, &v); | |
| 1043 | *value = (v & MVFP_FLIP) == MVFP_FLIP; | |
| 1044 | return ret; | |
| 1045 | } | |
| 1046 | ||
| 1047 | ||
| f9a76156 | 1048 | static int ov7670_t_vflip(struct i2c_client *client, int value) |
| 111f3356 JC |
1049 | { |
| 1050 | unsigned char v; | |
| 1051 | int ret; | |
| 1052 | ||
| 1053 | ret = ov7670_read(client, REG_MVFP, &v); | |
| 1054 | if (value) | |
| 1055 | v |= MVFP_FLIP; | |
| 1056 | else | |
| 1057 | v &= ~MVFP_FLIP; | |
| 1058 | msleep(10); /* FIXME */ | |
| 1059 | ret += ov7670_write(client, REG_MVFP, v); | |
| 1060 | return ret; | |
| 1061 | } | |
| 1062 | ||
| 1063 | ||
| 1064 | static struct ov7670_control { | |
| 1065 | struct v4l2_queryctrl qc; | |
| f9a76156 JC |
1066 | int (*query)(struct i2c_client *c, __s32 *value); |
| 1067 | int (*tweak)(struct i2c_client *c, int value); | |
| 111f3356 JC |
1068 | } ov7670_controls[] = |
| 1069 | { | |
| 1070 | { | |
| 1071 | .qc = { | |
| 1072 | .id = V4L2_CID_BRIGHTNESS, | |
| 1073 | .type = V4L2_CTRL_TYPE_INTEGER, | |
| 1074 | .name = "Brightness", | |
| 1075 | .minimum = 0, | |
| 1076 | .maximum = 255, | |
| 1077 | .step = 1, | |
| 1078 | .default_value = 0x80, | |
| 1079 | .flags = V4L2_CTRL_FLAG_SLIDER | |
| 1080 | }, | |
| 1081 | .tweak = ov7670_t_brightness, | |
| 1082 | .query = ov7670_q_brightness, | |
| 1083 | }, | |
| 1084 | { | |
| 1085 | .qc = { | |
| 1086 | .id = V4L2_CID_CONTRAST, | |
| 1087 | .type = V4L2_CTRL_TYPE_INTEGER, | |
| 1088 | .name = "Contrast", | |
| 1089 | .minimum = 0, | |
| 1090 | .maximum = 127, | |
| 1091 | .step = 1, | |
| 1092 | .default_value = 0x40, /* XXX ov7670 spec */ | |
| 1093 | .flags = V4L2_CTRL_FLAG_SLIDER | |
| 1094 | }, | |
| 1095 | .tweak = ov7670_t_contrast, | |
| 1096 | .query = ov7670_q_contrast, | |
| 1097 | }, | |
| f9a76156 JC |
1098 | { |
| 1099 | .qc = { | |
| 1100 | .id = V4L2_CID_SATURATION, | |
| 1101 | .type = V4L2_CTRL_TYPE_INTEGER, | |
| 1102 | .name = "Saturation", | |
| 1103 | .minimum = 0, | |
| 1104 | .maximum = 256, | |
| 1105 | .step = 1, | |
| 1106 | .default_value = 0x80, | |
| 1107 | .flags = V4L2_CTRL_FLAG_SLIDER | |
| 1108 | }, | |
| 1109 | .tweak = ov7670_t_sat, | |
| 1110 | .query = ov7670_q_sat, | |
| 1111 | }, | |
| 1112 | { | |
| 1113 | .qc = { | |
| 1114 | .id = V4L2_CID_HUE, | |
| 1115 | .type = V4L2_CTRL_TYPE_INTEGER, | |
| 1116 | .name = "HUE", | |
| 1117 | .minimum = -180, | |
| 1118 | .maximum = 180, | |
| 1119 | .step = 5, | |
| 1120 | .default_value = 0, | |
| 1121 | .flags = V4L2_CTRL_FLAG_SLIDER | |
| 1122 | }, | |
| 1123 | .tweak = ov7670_t_hue, | |
| 1124 | .query = ov7670_q_hue, | |
| 1125 | }, | |
| 111f3356 JC |
1126 | { |
| 1127 | .qc = { | |
| 1128 | .id = V4L2_CID_VFLIP, | |
| 1129 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
| 1130 | .name = "Vertical flip", | |
| 1131 | .minimum = 0, | |
| 1132 | .maximum = 1, | |
| 1133 | .step = 1, | |
| 1134 | .default_value = 0, | |
| 1135 | }, | |
| 1136 | .tweak = ov7670_t_vflip, | |
| 1137 | .query = ov7670_q_vflip, | |
| 1138 | }, | |
| 1139 | { | |
| 1140 | .qc = { | |
| 1141 | .id = V4L2_CID_HFLIP, | |
| 1142 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
| 1143 | .name = "Horizontal mirror", | |
| 1144 | .minimum = 0, | |
| 1145 | .maximum = 1, | |
| 1146 | .step = 1, | |
| 1147 | .default_value = 0, | |
| 1148 | }, | |
| 1149 | .tweak = ov7670_t_hflip, | |
| 1150 | .query = ov7670_q_hflip, | |
| 1151 | }, | |
| 1152 | }; | |
| 1153 | #define N_CONTROLS (sizeof(ov7670_controls)/sizeof(ov7670_controls[0])) | |
| 1154 | ||
| 1155 | static struct ov7670_control *ov7670_find_control(__u32 id) | |
| 1156 | { | |
| 1157 | int i; | |
| 1158 | ||
| 1159 | for (i = 0; i < N_CONTROLS; i++) | |
| 1160 | if (ov7670_controls[i].qc.id == id) | |
| 1161 | return ov7670_controls + i; | |
| 1162 | return NULL; | |
| 1163 | } | |
| 1164 | ||
| 1165 | ||
| 1166 | static int ov7670_queryctrl(struct i2c_client *client, | |
| 1167 | struct v4l2_queryctrl *qc) | |
| 1168 | { | |
| 1169 | struct ov7670_control *ctrl = ov7670_find_control(qc->id); | |
| 1170 | ||
| 1171 | if (ctrl == NULL) | |
| 1172 | return -EINVAL; | |
| 1173 | *qc = ctrl->qc; | |
| 1174 | return 0; | |
| 1175 | } | |
| 1176 | ||
| 1177 | static int ov7670_g_ctrl(struct i2c_client *client, struct v4l2_control *ctrl) | |
| 1178 | { | |
| 1179 | struct ov7670_control *octrl = ov7670_find_control(ctrl->id); | |
| 1180 | int ret; | |
| 111f3356 JC |
1181 | |
| 1182 | if (octrl == NULL) | |
| 1183 | return -EINVAL; | |
| f9a76156 JC |
1184 | ret = octrl->query(client, &ctrl->value); |
| 1185 | if (ret >= 0) | |
| 111f3356 | 1186 | return 0; |
| 111f3356 JC |
1187 | return ret; |
| 1188 | } | |
| 1189 | ||
| 1190 | static int ov7670_s_ctrl(struct i2c_client *client, struct v4l2_control *ctrl) | |
| 1191 | { | |
| 1192 | struct ov7670_control *octrl = ov7670_find_control(ctrl->id); | |
| f9a76156 | 1193 | int ret; |
| 111f3356 JC |
1194 | |
| 1195 | if (octrl == NULL) | |
| 1196 | return -EINVAL; | |
| f9a76156 JC |
1197 | ret = octrl->tweak(client, ctrl->value); |
| 1198 | if (ret >= 0) | |
| 1199 | return 0; | |
| 1200 | return ret; | |
| 111f3356 JC |
1201 | } |
| 1202 | ||
| 1203 | ||
| 1204 | ||
| 1205 | ||
| 1206 | ||
| 1207 | ||
| 111f3356 JC |
1208 | /* |
| 1209 | * Basic i2c stuff. | |
| 1210 | */ | |
| 1211 | static struct i2c_driver ov7670_driver; | |
| 1212 | ||
| 1213 | static int ov7670_attach(struct i2c_adapter *adapter) | |
| 1214 | { | |
| 1215 | int ret; | |
| 1216 | struct i2c_client *client; | |
| f9a76156 | 1217 | struct ov7670_info *info; |
| 111f3356 | 1218 | |
| 111f3356 JC |
1219 | /* |
| 1220 | * For now: only deal with adapters we recognize. | |
| 1221 | */ | |
| 1222 | if (adapter->id != I2C_HW_SMBUS_CAFE) | |
| 1223 | return -ENODEV; | |
| 1224 | ||
| 111f3356 JC |
1225 | client = kzalloc(sizeof (struct i2c_client), GFP_KERNEL); |
| 1226 | if (! client) | |
| 1227 | return -ENOMEM; | |
| 1228 | client->adapter = adapter; | |
| 1229 | client->addr = OV7670_I2C_ADDR; | |
| 1230 | client->driver = &ov7670_driver, | |
| 1231 | strcpy(client->name, "OV7670"); | |
| f9a76156 JC |
1232 | /* |
| 1233 | * Set up our info structure. | |
| 1234 | */ | |
| 1235 | info = kzalloc(sizeof (struct ov7670_info), GFP_KERNEL); | |
| 1236 | if (! info) { | |
| 1237 | ret = -ENOMEM; | |
| 1238 | goto out_free; | |
| 1239 | } | |
| 1240 | info->fmt = &ov7670_formats[0]; | |
| 1241 | info->sat = 128; /* Review this */ | |
| 1242 | i2c_set_clientdata(client, info); | |
| 111f3356 JC |
1243 | |
| 1244 | /* | |
| 1245 | * Make sure it's an ov7670 | |
| 1246 | */ | |
| 1247 | ret = ov7670_detect(client); | |
| 111f3356 | 1248 | if (ret) |
| f9a76156 | 1249 | goto out_free_info; |
| 111f3356 JC |
1250 | i2c_attach_client(client); |
| 1251 | return 0; | |
| 1252 | ||
| f9a76156 JC |
1253 | out_free_info: |
| 1254 | kfree(info); | |
| 111f3356 JC |
1255 | out_free: |
| 1256 | kfree(client); | |
| 1257 | return ret; | |
| 1258 | } | |
| 1259 | ||
| 1260 | ||
| 1261 | static int ov7670_detach(struct i2c_client *client) | |
| 1262 | { | |
| 1263 | i2c_detach_client(client); | |
| f9a76156 | 1264 | kfree(i2c_get_clientdata(client)); |
| 111f3356 JC |
1265 | kfree(client); |
| 1266 | return 0; | |
| 1267 | } | |
| 1268 | ||
| 1269 | ||
| 1270 | static int ov7670_command(struct i2c_client *client, unsigned int cmd, | |
| 1271 | void *arg) | |
| 1272 | { | |
| 1273 | switch (cmd) { | |
| 3434eb7e HV |
1274 | case VIDIOC_G_CHIP_IDENT: |
| 1275 | return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_OV7670, 0); | |
| 111f3356 JC |
1276 | |
| 1277 | case VIDIOC_INT_RESET: | |
| 1278 | ov7670_reset(client); | |
| 1279 | return 0; | |
| 1280 | ||
| 1281 | case VIDIOC_INT_INIT: | |
| 1282 | return ov7670_init(client); | |
| 1283 | ||
| 1284 | case VIDIOC_ENUM_FMT: | |
| 1285 | return ov7670_enum_fmt(client, (struct v4l2_fmtdesc *) arg); | |
| 1286 | case VIDIOC_TRY_FMT: | |
| 1287 | return ov7670_try_fmt(client, (struct v4l2_format *) arg, NULL, NULL); | |
| 1288 | case VIDIOC_S_FMT: | |
| 1289 | return ov7670_s_fmt(client, (struct v4l2_format *) arg); | |
| 1290 | case VIDIOC_QUERYCTRL: | |
| 1291 | return ov7670_queryctrl(client, (struct v4l2_queryctrl *) arg); | |
| 1292 | case VIDIOC_S_CTRL: | |
| 1293 | return ov7670_s_ctrl(client, (struct v4l2_control *) arg); | |
| 1294 | case VIDIOC_G_CTRL: | |
| 1295 | return ov7670_g_ctrl(client, (struct v4l2_control *) arg); | |
| c8f5b2f5 JC |
1296 | case VIDIOC_S_PARM: |
| 1297 | return ov7670_s_parm(client, (struct v4l2_streamparm *) arg); | |
| 1298 | case VIDIOC_G_PARM: | |
| 1299 | return ov7670_g_parm(client, (struct v4l2_streamparm *) arg); | |
| 111f3356 JC |
1300 | } |
| 1301 | return -EINVAL; | |
| 1302 | } | |
| 1303 | ||
| 1304 | ||
| 1305 | ||
| 1306 | static struct i2c_driver ov7670_driver = { | |
| 1307 | .driver = { | |
| 1308 | .name = "ov7670", | |
| 1309 | }, | |
| 1310 | .id = I2C_DRIVERID_OV7670, | |
| 1311 | .class = I2C_CLASS_CAM_DIGITAL, | |
| 1312 | .attach_adapter = ov7670_attach, | |
| 1313 | .detach_client = ov7670_detach, | |
| 1314 | .command = ov7670_command, | |
| 1315 | }; | |
| 1316 | ||
| 1317 | ||
| 1318 | /* | |
| 1319 | * Module initialization | |
| 1320 | */ | |
| 1321 | static int __init ov7670_mod_init(void) | |
| 1322 | { | |
| 1323 | printk(KERN_NOTICE "OmniVision ov7670 sensor driver, at your service\n"); | |
| 1324 | return i2c_add_driver(&ov7670_driver); | |
| 1325 | } | |
| 1326 | ||
| 1327 | static void __exit ov7670_mod_exit(void) | |
| 1328 | { | |
| 1329 | i2c_del_driver(&ov7670_driver); | |
| 1330 | } | |
| 1331 | ||
| 1332 | module_init(ov7670_mod_init); | |
| 1333 | module_exit(ov7670_mod_exit); |