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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 15 | #include <linux/slab.h> |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 16 | #include <linux/i2c.h> |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 17 | #include <linux/delay.h> |
Mauro Carvalho Chehab | 7e0a16f | 2009-03-10 05:31:34 -0300 | [diff] [blame] | 18 | #include <linux/videodev2.h> |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 19 | #include <media/v4l2-device.h> |
Hans Verkuil | 3434eb7 | 2007-04-27 12:31:08 -0300 | [diff] [blame] | 20 | #include <media/v4l2-chip-ident.h> |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 21 | #include <media/v4l2-mediabus.h> |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 22 | #include <media/v4l2-i2c-drv.h> |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 23 | |
| 24 | |
Dave Jones | 5e61447 | 2006-12-12 20:15:40 +0100 | [diff] [blame] | 25 | MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>"); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 26 | MODULE_DESCRIPTION("A low-level driver for OmniVision ov7670 sensors"); |
| 27 | MODULE_LICENSE("GPL"); |
| 28 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 29 | static int debug; |
| 30 | module_param(debug, bool, 0644); |
| 31 | MODULE_PARM_DESC(debug, "Debug level (0-1)"); |
| 32 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 33 | /* |
| 34 | * Basic window sizes. These probably belong somewhere more globally |
| 35 | * useful. |
| 36 | */ |
| 37 | #define VGA_WIDTH 640 |
| 38 | #define VGA_HEIGHT 480 |
| 39 | #define QVGA_WIDTH 320 |
| 40 | #define QVGA_HEIGHT 240 |
| 41 | #define CIF_WIDTH 352 |
| 42 | #define CIF_HEIGHT 288 |
| 43 | #define QCIF_WIDTH 176 |
| 44 | #define QCIF_HEIGHT 144 |
| 45 | |
| 46 | /* |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 47 | * Our nominal (default) frame rate. |
| 48 | */ |
| 49 | #define OV7670_FRAME_RATE 30 |
| 50 | |
| 51 | /* |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 52 | * The 7670 sits on i2c with ID 0x42 |
| 53 | */ |
| 54 | #define OV7670_I2C_ADDR 0x42 |
| 55 | |
| 56 | /* Registers */ |
| 57 | #define REG_GAIN 0x00 /* Gain lower 8 bits (rest in vref) */ |
| 58 | #define REG_BLUE 0x01 /* blue gain */ |
| 59 | #define REG_RED 0x02 /* red gain */ |
| 60 | #define REG_VREF 0x03 /* Pieces of GAIN, VSTART, VSTOP */ |
| 61 | #define REG_COM1 0x04 /* Control 1 */ |
| 62 | #define COM1_CCIR656 0x40 /* CCIR656 enable */ |
| 63 | #define REG_BAVE 0x05 /* U/B Average level */ |
| 64 | #define REG_GbAVE 0x06 /* Y/Gb Average level */ |
| 65 | #define REG_AECHH 0x07 /* AEC MS 5 bits */ |
| 66 | #define REG_RAVE 0x08 /* V/R Average level */ |
| 67 | #define REG_COM2 0x09 /* Control 2 */ |
| 68 | #define COM2_SSLEEP 0x10 /* Soft sleep mode */ |
| 69 | #define REG_PID 0x0a /* Product ID MSB */ |
| 70 | #define REG_VER 0x0b /* Product ID LSB */ |
| 71 | #define REG_COM3 0x0c /* Control 3 */ |
| 72 | #define COM3_SWAP 0x40 /* Byte swap */ |
| 73 | #define COM3_SCALEEN 0x08 /* Enable scaling */ |
| 74 | #define COM3_DCWEN 0x04 /* Enable downsamp/crop/window */ |
| 75 | #define REG_COM4 0x0d /* Control 4 */ |
| 76 | #define REG_COM5 0x0e /* All "reserved" */ |
| 77 | #define REG_COM6 0x0f /* Control 6 */ |
| 78 | #define REG_AECH 0x10 /* More bits of AEC value */ |
| 79 | #define REG_CLKRC 0x11 /* Clocl control */ |
| 80 | #define CLK_EXT 0x40 /* Use external clock directly */ |
| 81 | #define CLK_SCALE 0x3f /* Mask for internal clock scale */ |
| 82 | #define REG_COM7 0x12 /* Control 7 */ |
| 83 | #define COM7_RESET 0x80 /* Register reset */ |
| 84 | #define COM7_FMT_MASK 0x38 |
| 85 | #define COM7_FMT_VGA 0x00 |
| 86 | #define COM7_FMT_CIF 0x20 /* CIF format */ |
| 87 | #define COM7_FMT_QVGA 0x10 /* QVGA format */ |
| 88 | #define COM7_FMT_QCIF 0x08 /* QCIF format */ |
| 89 | #define COM7_RGB 0x04 /* bits 0 and 2 - RGB format */ |
| 90 | #define COM7_YUV 0x00 /* YUV */ |
| 91 | #define COM7_BAYER 0x01 /* Bayer format */ |
| 92 | #define COM7_PBAYER 0x05 /* "Processed bayer" */ |
| 93 | #define REG_COM8 0x13 /* Control 8 */ |
| 94 | #define COM8_FASTAEC 0x80 /* Enable fast AGC/AEC */ |
| 95 | #define COM8_AECSTEP 0x40 /* Unlimited AEC step size */ |
| 96 | #define COM8_BFILT 0x20 /* Band filter enable */ |
| 97 | #define COM8_AGC 0x04 /* Auto gain enable */ |
| 98 | #define COM8_AWB 0x02 /* White balance enable */ |
| 99 | #define COM8_AEC 0x01 /* Auto exposure enable */ |
| 100 | #define REG_COM9 0x14 /* Control 9 - gain ceiling */ |
| 101 | #define REG_COM10 0x15 /* Control 10 */ |
| 102 | #define COM10_HSYNC 0x40 /* HSYNC instead of HREF */ |
| 103 | #define COM10_PCLK_HB 0x20 /* Suppress PCLK on horiz blank */ |
| 104 | #define COM10_HREF_REV 0x08 /* Reverse HREF */ |
| 105 | #define COM10_VS_LEAD 0x04 /* VSYNC on clock leading edge */ |
| 106 | #define COM10_VS_NEG 0x02 /* VSYNC negative */ |
| 107 | #define COM10_HS_NEG 0x01 /* HSYNC negative */ |
| 108 | #define REG_HSTART 0x17 /* Horiz start high bits */ |
| 109 | #define REG_HSTOP 0x18 /* Horiz stop high bits */ |
| 110 | #define REG_VSTART 0x19 /* Vert start high bits */ |
| 111 | #define REG_VSTOP 0x1a /* Vert stop high bits */ |
| 112 | #define REG_PSHFT 0x1b /* Pixel delay after HREF */ |
| 113 | #define REG_MIDH 0x1c /* Manuf. ID high */ |
| 114 | #define REG_MIDL 0x1d /* Manuf. ID low */ |
| 115 | #define REG_MVFP 0x1e /* Mirror / vflip */ |
| 116 | #define MVFP_MIRROR 0x20 /* Mirror image */ |
| 117 | #define MVFP_FLIP 0x10 /* Vertical flip */ |
| 118 | |
| 119 | #define REG_AEW 0x24 /* AGC upper limit */ |
| 120 | #define REG_AEB 0x25 /* AGC lower limit */ |
| 121 | #define REG_VPT 0x26 /* AGC/AEC fast mode op region */ |
| 122 | #define REG_HSYST 0x30 /* HSYNC rising edge delay */ |
| 123 | #define REG_HSYEN 0x31 /* HSYNC falling edge delay */ |
| 124 | #define REG_HREF 0x32 /* HREF pieces */ |
| 125 | #define REG_TSLB 0x3a /* lots of stuff */ |
| 126 | #define TSLB_YLAST 0x04 /* UYVY or VYUY - see com13 */ |
| 127 | #define REG_COM11 0x3b /* Control 11 */ |
| 128 | #define COM11_NIGHT 0x80 /* NIght mode enable */ |
| 129 | #define COM11_NMFR 0x60 /* Two bit NM frame rate */ |
| 130 | #define COM11_HZAUTO 0x10 /* Auto detect 50/60 Hz */ |
| 131 | #define COM11_50HZ 0x08 /* Manual 50Hz select */ |
| 132 | #define COM11_EXP 0x02 |
| 133 | #define REG_COM12 0x3c /* Control 12 */ |
| 134 | #define COM12_HREF 0x80 /* HREF always */ |
| 135 | #define REG_COM13 0x3d /* Control 13 */ |
| 136 | #define COM13_GAMMA 0x80 /* Gamma enable */ |
| 137 | #define COM13_UVSAT 0x40 /* UV saturation auto adjustment */ |
| 138 | #define COM13_UVSWAP 0x01 /* V before U - w/TSLB */ |
| 139 | #define REG_COM14 0x3e /* Control 14 */ |
| 140 | #define COM14_DCWEN 0x10 /* DCW/PCLK-scale enable */ |
| 141 | #define REG_EDGE 0x3f /* Edge enhancement factor */ |
| 142 | #define REG_COM15 0x40 /* Control 15 */ |
| 143 | #define COM15_R10F0 0x00 /* Data range 10 to F0 */ |
| 144 | #define COM15_R01FE 0x80 /* 01 to FE */ |
| 145 | #define COM15_R00FF 0xc0 /* 00 to FF */ |
| 146 | #define COM15_RGB565 0x10 /* RGB565 output */ |
| 147 | #define COM15_RGB555 0x30 /* RGB555 output */ |
| 148 | #define REG_COM16 0x41 /* Control 16 */ |
| 149 | #define COM16_AWBGAIN 0x08 /* AWB gain enable */ |
| 150 | #define REG_COM17 0x42 /* Control 17 */ |
| 151 | #define COM17_AECWIN 0xc0 /* AEC window - must match COM4 */ |
| 152 | #define COM17_CBAR 0x08 /* DSP Color bar */ |
| 153 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 154 | /* |
| 155 | * This matrix defines how the colors are generated, must be |
| 156 | * tweaked to adjust hue and saturation. |
| 157 | * |
| 158 | * Order: v-red, v-green, v-blue, u-red, u-green, u-blue |
| 159 | * |
| 160 | * They are nine-bit signed quantities, with the sign bit |
| 161 | * stored in 0x58. Sign for v-red is bit 0, and up from there. |
| 162 | */ |
| 163 | #define REG_CMATRIX_BASE 0x4f |
| 164 | #define CMATRIX_LEN 6 |
| 165 | #define REG_CMATRIX_SIGN 0x58 |
| 166 | |
| 167 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 168 | #define REG_BRIGHT 0x55 /* Brightness */ |
| 169 | #define REG_CONTRAS 0x56 /* Contrast control */ |
| 170 | |
| 171 | #define REG_GFIX 0x69 /* Fix gain control */ |
| 172 | |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 173 | #define REG_REG76 0x76 /* OV's name */ |
| 174 | #define R76_BLKPCOR 0x80 /* Black pixel correction enable */ |
| 175 | #define R76_WHTPCOR 0x40 /* White pixel correction enable */ |
| 176 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 177 | #define REG_RGB444 0x8c /* RGB 444 control */ |
| 178 | #define R444_ENABLE 0x02 /* Turn on RGB444, overrides 5x5 */ |
| 179 | #define R444_RGBX 0x01 /* Empty nibble at end */ |
| 180 | |
| 181 | #define REG_HAECC1 0x9f /* Hist AEC/AGC control 1 */ |
| 182 | #define REG_HAECC2 0xa0 /* Hist AEC/AGC control 2 */ |
| 183 | |
| 184 | #define REG_BD50MAX 0xa5 /* 50hz banding step limit */ |
| 185 | #define REG_HAECC3 0xa6 /* Hist AEC/AGC control 3 */ |
| 186 | #define REG_HAECC4 0xa7 /* Hist AEC/AGC control 4 */ |
| 187 | #define REG_HAECC5 0xa8 /* Hist AEC/AGC control 5 */ |
| 188 | #define REG_HAECC6 0xa9 /* Hist AEC/AGC control 6 */ |
| 189 | #define REG_HAECC7 0xaa /* Hist AEC/AGC control 7 */ |
| 190 | #define REG_BD60MAX 0xab /* 60hz banding step limit */ |
| 191 | |
| 192 | |
| 193 | /* |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 194 | * Information we maintain about a known sensor. |
| 195 | */ |
| 196 | struct ov7670_format_struct; /* coming later */ |
| 197 | struct ov7670_info { |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 198 | struct v4l2_subdev sd; |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 199 | struct ov7670_format_struct *fmt; /* Current format */ |
| 200 | unsigned char sat; /* Saturation value */ |
| 201 | int hue; /* Hue value */ |
Jonathan Corbet | d8d2015 | 2009-12-20 11:39:47 -0300 | [diff] [blame] | 202 | u8 clkrc; /* Clock divider value */ |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 203 | }; |
| 204 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 205 | static inline struct ov7670_info *to_state(struct v4l2_subdev *sd) |
| 206 | { |
| 207 | return container_of(sd, struct ov7670_info, sd); |
| 208 | } |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 209 | |
| 210 | |
| 211 | |
| 212 | /* |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 213 | * The default register settings, as obtained from OmniVision. There |
| 214 | * is really no making sense of most of these - lots of "reserved" values |
| 215 | * and such. |
| 216 | * |
| 217 | * These settings give VGA YUYV. |
| 218 | */ |
| 219 | |
| 220 | struct regval_list { |
| 221 | unsigned char reg_num; |
| 222 | unsigned char value; |
| 223 | }; |
| 224 | |
| 225 | static struct regval_list ov7670_default_regs[] = { |
| 226 | { REG_COM7, COM7_RESET }, |
| 227 | /* |
| 228 | * Clock scale: 3 = 15fps |
| 229 | * 2 = 20fps |
| 230 | * 1 = 30fps |
| 231 | */ |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 232 | { REG_CLKRC, 0x1 }, /* OV: clock scale (30 fps) */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 233 | { REG_TSLB, 0x04 }, /* OV */ |
| 234 | { REG_COM7, 0 }, /* VGA */ |
| 235 | /* |
| 236 | * Set the hardware window. These values from OV don't entirely |
| 237 | * make sense - hstop is less than hstart. But they work... |
| 238 | */ |
| 239 | { REG_HSTART, 0x13 }, { REG_HSTOP, 0x01 }, |
| 240 | { REG_HREF, 0xb6 }, { REG_VSTART, 0x02 }, |
| 241 | { REG_VSTOP, 0x7a }, { REG_VREF, 0x0a }, |
| 242 | |
| 243 | { REG_COM3, 0 }, { REG_COM14, 0 }, |
| 244 | /* Mystery scaling numbers */ |
| 245 | { 0x70, 0x3a }, { 0x71, 0x35 }, |
| 246 | { 0x72, 0x11 }, { 0x73, 0xf0 }, |
| 247 | { 0xa2, 0x02 }, { REG_COM10, 0x0 }, |
| 248 | |
| 249 | /* Gamma curve values */ |
| 250 | { 0x7a, 0x20 }, { 0x7b, 0x10 }, |
| 251 | { 0x7c, 0x1e }, { 0x7d, 0x35 }, |
| 252 | { 0x7e, 0x5a }, { 0x7f, 0x69 }, |
| 253 | { 0x80, 0x76 }, { 0x81, 0x80 }, |
| 254 | { 0x82, 0x88 }, { 0x83, 0x8f }, |
| 255 | { 0x84, 0x96 }, { 0x85, 0xa3 }, |
| 256 | { 0x86, 0xaf }, { 0x87, 0xc4 }, |
| 257 | { 0x88, 0xd7 }, { 0x89, 0xe8 }, |
| 258 | |
| 259 | /* AGC and AEC parameters. Note we start by disabling those features, |
| 260 | then turn them only after tweaking the values. */ |
| 261 | { REG_COM8, COM8_FASTAEC | COM8_AECSTEP | COM8_BFILT }, |
| 262 | { REG_GAIN, 0 }, { REG_AECH, 0 }, |
| 263 | { REG_COM4, 0x40 }, /* magic reserved bit */ |
| 264 | { REG_COM9, 0x18 }, /* 4x gain + magic rsvd bit */ |
| 265 | { REG_BD50MAX, 0x05 }, { REG_BD60MAX, 0x07 }, |
| 266 | { REG_AEW, 0x95 }, { REG_AEB, 0x33 }, |
| 267 | { REG_VPT, 0xe3 }, { REG_HAECC1, 0x78 }, |
| 268 | { REG_HAECC2, 0x68 }, { 0xa1, 0x03 }, /* magic */ |
| 269 | { REG_HAECC3, 0xd8 }, { REG_HAECC4, 0xd8 }, |
| 270 | { REG_HAECC5, 0xf0 }, { REG_HAECC6, 0x90 }, |
| 271 | { REG_HAECC7, 0x94 }, |
| 272 | { REG_COM8, COM8_FASTAEC|COM8_AECSTEP|COM8_BFILT|COM8_AGC|COM8_AEC }, |
| 273 | |
| 274 | /* Almost all of these are magic "reserved" values. */ |
| 275 | { REG_COM5, 0x61 }, { REG_COM6, 0x4b }, |
Jonathan Corbet | 7f7b12f | 2007-03-25 11:36:42 -0300 | [diff] [blame] | 276 | { 0x16, 0x02 }, { REG_MVFP, 0x07 }, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 277 | { 0x21, 0x02 }, { 0x22, 0x91 }, |
| 278 | { 0x29, 0x07 }, { 0x33, 0x0b }, |
| 279 | { 0x35, 0x0b }, { 0x37, 0x1d }, |
| 280 | { 0x38, 0x71 }, { 0x39, 0x2a }, |
| 281 | { REG_COM12, 0x78 }, { 0x4d, 0x40 }, |
| 282 | { 0x4e, 0x20 }, { REG_GFIX, 0 }, |
| 283 | { 0x6b, 0x4a }, { 0x74, 0x10 }, |
| 284 | { 0x8d, 0x4f }, { 0x8e, 0 }, |
| 285 | { 0x8f, 0 }, { 0x90, 0 }, |
| 286 | { 0x91, 0 }, { 0x96, 0 }, |
| 287 | { 0x9a, 0 }, { 0xb0, 0x84 }, |
| 288 | { 0xb1, 0x0c }, { 0xb2, 0x0e }, |
| 289 | { 0xb3, 0x82 }, { 0xb8, 0x0a }, |
| 290 | |
| 291 | /* More reserved magic, some of which tweaks white balance */ |
| 292 | { 0x43, 0x0a }, { 0x44, 0xf0 }, |
| 293 | { 0x45, 0x34 }, { 0x46, 0x58 }, |
| 294 | { 0x47, 0x28 }, { 0x48, 0x3a }, |
| 295 | { 0x59, 0x88 }, { 0x5a, 0x88 }, |
| 296 | { 0x5b, 0x44 }, { 0x5c, 0x67 }, |
| 297 | { 0x5d, 0x49 }, { 0x5e, 0x0e }, |
| 298 | { 0x6c, 0x0a }, { 0x6d, 0x55 }, |
| 299 | { 0x6e, 0x11 }, { 0x6f, 0x9f }, /* "9e for advance AWB" */ |
| 300 | { 0x6a, 0x40 }, { REG_BLUE, 0x40 }, |
| 301 | { REG_RED, 0x60 }, |
| 302 | { REG_COM8, COM8_FASTAEC|COM8_AECSTEP|COM8_BFILT|COM8_AGC|COM8_AEC|COM8_AWB }, |
| 303 | |
| 304 | /* Matrix coefficients */ |
| 305 | { 0x4f, 0x80 }, { 0x50, 0x80 }, |
| 306 | { 0x51, 0 }, { 0x52, 0x22 }, |
| 307 | { 0x53, 0x5e }, { 0x54, 0x80 }, |
| 308 | { 0x58, 0x9e }, |
| 309 | |
| 310 | { REG_COM16, COM16_AWBGAIN }, { REG_EDGE, 0 }, |
| 311 | { 0x75, 0x05 }, { 0x76, 0xe1 }, |
| 312 | { 0x4c, 0 }, { 0x77, 0x01 }, |
| 313 | { REG_COM13, 0xc3 }, { 0x4b, 0x09 }, |
| 314 | { 0xc9, 0x60 }, { REG_COM16, 0x38 }, |
| 315 | { 0x56, 0x40 }, |
| 316 | |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 317 | { 0x34, 0x11 }, { REG_COM11, COM11_EXP|COM11_HZAUTO }, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 318 | { 0xa4, 0x88 }, { 0x96, 0 }, |
| 319 | { 0x97, 0x30 }, { 0x98, 0x20 }, |
| 320 | { 0x99, 0x30 }, { 0x9a, 0x84 }, |
| 321 | { 0x9b, 0x29 }, { 0x9c, 0x03 }, |
| 322 | { 0x9d, 0x4c }, { 0x9e, 0x3f }, |
| 323 | { 0x78, 0x04 }, |
| 324 | |
| 325 | /* Extra-weird stuff. Some sort of multiplexor register */ |
| 326 | { 0x79, 0x01 }, { 0xc8, 0xf0 }, |
| 327 | { 0x79, 0x0f }, { 0xc8, 0x00 }, |
| 328 | { 0x79, 0x10 }, { 0xc8, 0x7e }, |
| 329 | { 0x79, 0x0a }, { 0xc8, 0x80 }, |
| 330 | { 0x79, 0x0b }, { 0xc8, 0x01 }, |
| 331 | { 0x79, 0x0c }, { 0xc8, 0x0f }, |
| 332 | { 0x79, 0x0d }, { 0xc8, 0x20 }, |
| 333 | { 0x79, 0x09 }, { 0xc8, 0x80 }, |
| 334 | { 0x79, 0x02 }, { 0xc8, 0xc0 }, |
| 335 | { 0x79, 0x03 }, { 0xc8, 0x40 }, |
| 336 | { 0x79, 0x05 }, { 0xc8, 0x30 }, |
| 337 | { 0x79, 0x26 }, |
| 338 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 339 | { 0xff, 0xff }, /* END MARKER */ |
| 340 | }; |
| 341 | |
| 342 | |
| 343 | /* |
| 344 | * Here we'll try to encapsulate the changes for just the output |
| 345 | * video format. |
| 346 | * |
| 347 | * RGB656 and YUV422 come from OV; RGB444 is homebrewed. |
| 348 | * |
| 349 | * IMPORTANT RULE: the first entry must be for COM7, see ov7670_s_fmt for why. |
| 350 | */ |
| 351 | |
| 352 | |
| 353 | static struct regval_list ov7670_fmt_yuv422[] = { |
| 354 | { REG_COM7, 0x0 }, /* Selects YUV mode */ |
| 355 | { REG_RGB444, 0 }, /* No RGB444 please */ |
Jonathan Corbet | 97693f9 | 2010-03-21 17:33:50 -0300 | [diff] [blame] | 356 | { REG_COM1, 0 }, /* CCIR601 */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 357 | { REG_COM15, COM15_R00FF }, |
| 358 | { REG_COM9, 0x18 }, /* 4x gain ceiling; 0x8 is reserved bit */ |
| 359 | { 0x4f, 0x80 }, /* "matrix coefficient 1" */ |
| 360 | { 0x50, 0x80 }, /* "matrix coefficient 2" */ |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 361 | { 0x51, 0 }, /* vb */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 362 | { 0x52, 0x22 }, /* "matrix coefficient 4" */ |
| 363 | { 0x53, 0x5e }, /* "matrix coefficient 5" */ |
| 364 | { 0x54, 0x80 }, /* "matrix coefficient 6" */ |
| 365 | { REG_COM13, COM13_GAMMA|COM13_UVSAT }, |
| 366 | { 0xff, 0xff }, |
| 367 | }; |
| 368 | |
| 369 | static struct regval_list ov7670_fmt_rgb565[] = { |
| 370 | { REG_COM7, COM7_RGB }, /* Selects RGB mode */ |
| 371 | { REG_RGB444, 0 }, /* No RGB444 please */ |
Jonathan Corbet | 97693f9 | 2010-03-21 17:33:50 -0300 | [diff] [blame] | 372 | { REG_COM1, 0x0 }, /* CCIR601 */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 373 | { REG_COM15, COM15_RGB565 }, |
| 374 | { REG_COM9, 0x38 }, /* 16x gain ceiling; 0x8 is reserved bit */ |
| 375 | { 0x4f, 0xb3 }, /* "matrix coefficient 1" */ |
| 376 | { 0x50, 0xb3 }, /* "matrix coefficient 2" */ |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 377 | { 0x51, 0 }, /* vb */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 378 | { 0x52, 0x3d }, /* "matrix coefficient 4" */ |
| 379 | { 0x53, 0xa7 }, /* "matrix coefficient 5" */ |
| 380 | { 0x54, 0xe4 }, /* "matrix coefficient 6" */ |
| 381 | { REG_COM13, COM13_GAMMA|COM13_UVSAT }, |
| 382 | { 0xff, 0xff }, |
| 383 | }; |
| 384 | |
| 385 | static struct regval_list ov7670_fmt_rgb444[] = { |
| 386 | { REG_COM7, COM7_RGB }, /* Selects RGB mode */ |
| 387 | { REG_RGB444, R444_ENABLE }, /* Enable xxxxrrrr ggggbbbb */ |
Jonathan Corbet | 97693f9 | 2010-03-21 17:33:50 -0300 | [diff] [blame] | 388 | { REG_COM1, 0x0 }, /* CCIR601 */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 389 | { REG_COM15, COM15_R01FE|COM15_RGB565 }, /* Data range needed? */ |
| 390 | { REG_COM9, 0x38 }, /* 16x gain ceiling; 0x8 is reserved bit */ |
| 391 | { 0x4f, 0xb3 }, /* "matrix coefficient 1" */ |
| 392 | { 0x50, 0xb3 }, /* "matrix coefficient 2" */ |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 393 | { 0x51, 0 }, /* vb */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 394 | { 0x52, 0x3d }, /* "matrix coefficient 4" */ |
| 395 | { 0x53, 0xa7 }, /* "matrix coefficient 5" */ |
| 396 | { 0x54, 0xe4 }, /* "matrix coefficient 6" */ |
| 397 | { REG_COM13, COM13_GAMMA|COM13_UVSAT|0x2 }, /* Magic rsvd bit */ |
| 398 | { 0xff, 0xff }, |
| 399 | }; |
| 400 | |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 401 | static struct regval_list ov7670_fmt_raw[] = { |
| 402 | { REG_COM7, COM7_BAYER }, |
| 403 | { REG_COM13, 0x08 }, /* No gamma, magic rsvd bit */ |
| 404 | { REG_COM16, 0x3d }, /* Edge enhancement, denoise */ |
| 405 | { REG_REG76, 0xe1 }, /* Pix correction, magic rsvd */ |
| 406 | { 0xff, 0xff }, |
| 407 | }; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 408 | |
| 409 | |
| 410 | |
| 411 | /* |
| 412 | * Low-level register I/O. |
Jonathan Corbet | 4671420 | 2010-03-19 13:16:28 -0300 | [diff] [blame] | 413 | * |
| 414 | * Note that there are two versions of these. On the XO 1, the |
| 415 | * i2c controller only does SMBUS, so that's what we use. The |
| 416 | * ov7670 is not really an SMBUS device, though, so the communication |
| 417 | * is not always entirely reliable. |
| 418 | */ |
| 419 | #ifdef CONFIG_OLPC_XO_1 |
| 420 | static int ov7670_read(struct v4l2_subdev *sd, unsigned char reg, |
| 421 | unsigned char *value) |
| 422 | { |
| 423 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 424 | int ret; |
| 425 | |
| 426 | ret = i2c_smbus_read_byte_data(client, reg); |
| 427 | if (ret >= 0) { |
| 428 | *value = (unsigned char)ret; |
| 429 | ret = 0; |
| 430 | } |
| 431 | return ret; |
| 432 | } |
| 433 | |
| 434 | |
| 435 | static int ov7670_write(struct v4l2_subdev *sd, unsigned char reg, |
| 436 | unsigned char value) |
| 437 | { |
| 438 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 439 | int ret = i2c_smbus_write_byte_data(client, reg, value); |
| 440 | |
| 441 | if (reg == REG_COM7 && (value & COM7_RESET)) |
| 442 | msleep(5); /* Wait for reset to run */ |
| 443 | return ret; |
| 444 | } |
| 445 | |
| 446 | #else /* ! CONFIG_OLPC_XO_1 */ |
| 447 | /* |
| 448 | * On most platforms, we'd rather do straight i2c I/O. |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 449 | */ |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 450 | static int ov7670_read(struct v4l2_subdev *sd, unsigned char reg, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 451 | unsigned char *value) |
| 452 | { |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 453 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
Jonathan Corbet | 2bf7de4 | 2010-02-28 21:02:55 -0300 | [diff] [blame] | 454 | u8 data = reg; |
| 455 | struct i2c_msg msg; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 456 | int ret; |
| 457 | |
Jonathan Corbet | 2bf7de4 | 2010-02-28 21:02:55 -0300 | [diff] [blame] | 458 | /* |
| 459 | * Send out the register address... |
| 460 | */ |
| 461 | msg.addr = client->addr; |
| 462 | msg.flags = 0; |
| 463 | msg.len = 1; |
| 464 | msg.buf = &data; |
| 465 | ret = i2c_transfer(client->adapter, &msg, 1); |
| 466 | if (ret < 0) { |
| 467 | printk(KERN_ERR "Error %d on register write\n", ret); |
| 468 | return ret; |
| 469 | } |
| 470 | /* |
| 471 | * ...then read back the result. |
| 472 | */ |
| 473 | msg.flags = I2C_M_RD; |
| 474 | ret = i2c_transfer(client->adapter, &msg, 1); |
Andres Salomon | bca5c2c | 2008-07-12 13:47:54 -0700 | [diff] [blame] | 475 | if (ret >= 0) { |
Jonathan Corbet | 2bf7de4 | 2010-02-28 21:02:55 -0300 | [diff] [blame] | 476 | *value = data; |
Andres Salomon | bca5c2c | 2008-07-12 13:47:54 -0700 | [diff] [blame] | 477 | ret = 0; |
| 478 | } |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 479 | return ret; |
| 480 | } |
| 481 | |
| 482 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 483 | static int ov7670_write(struct v4l2_subdev *sd, unsigned char reg, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 484 | unsigned char value) |
| 485 | { |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 486 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
Jonathan Corbet | 2bf7de4 | 2010-02-28 21:02:55 -0300 | [diff] [blame] | 487 | struct i2c_msg msg; |
| 488 | unsigned char data[2] = { reg, value }; |
| 489 | int ret; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 490 | |
Jonathan Corbet | 2bf7de4 | 2010-02-28 21:02:55 -0300 | [diff] [blame] | 491 | msg.addr = client->addr; |
| 492 | msg.flags = 0; |
| 493 | msg.len = 2; |
| 494 | msg.buf = data; |
| 495 | ret = i2c_transfer(client->adapter, &msg, 1); |
| 496 | if (ret > 0) |
| 497 | ret = 0; |
Jonathan Corbet | 6d77444 | 2007-08-17 01:02:33 -0300 | [diff] [blame] | 498 | if (reg == REG_COM7 && (value & COM7_RESET)) |
Jonathan Corbet | 97693f9 | 2010-03-21 17:33:50 -0300 | [diff] [blame] | 499 | msleep(5); /* Wait for reset to run */ |
Jonathan Corbet | 6d77444 | 2007-08-17 01:02:33 -0300 | [diff] [blame] | 500 | return ret; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 501 | } |
Jonathan Corbet | 4671420 | 2010-03-19 13:16:28 -0300 | [diff] [blame] | 502 | #endif /* CONFIG_OLPC_XO_1 */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 503 | |
| 504 | |
| 505 | /* |
| 506 | * Write a list of register settings; ff/ff stops the process. |
| 507 | */ |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 508 | static int ov7670_write_array(struct v4l2_subdev *sd, struct regval_list *vals) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 509 | { |
| 510 | while (vals->reg_num != 0xff || vals->value != 0xff) { |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 511 | int ret = ov7670_write(sd, vals->reg_num, vals->value); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 512 | if (ret < 0) |
| 513 | return ret; |
| 514 | vals++; |
| 515 | } |
| 516 | return 0; |
| 517 | } |
| 518 | |
| 519 | |
| 520 | /* |
| 521 | * Stuff that knows about the sensor. |
| 522 | */ |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 523 | static int ov7670_reset(struct v4l2_subdev *sd, u32 val) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 524 | { |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 525 | ov7670_write(sd, REG_COM7, COM7_RESET); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 526 | msleep(1); |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 527 | return 0; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 531 | static int ov7670_init(struct v4l2_subdev *sd, u32 val) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 532 | { |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 533 | return ov7670_write_array(sd, ov7670_default_regs); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 534 | } |
| 535 | |
| 536 | |
| 537 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 538 | static int ov7670_detect(struct v4l2_subdev *sd) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 539 | { |
| 540 | unsigned char v; |
| 541 | int ret; |
| 542 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 543 | ret = ov7670_init(sd, 0); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 544 | if (ret < 0) |
| 545 | return ret; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 546 | ret = ov7670_read(sd, REG_MIDH, &v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 547 | if (ret < 0) |
| 548 | return ret; |
| 549 | if (v != 0x7f) /* OV manuf. id. */ |
| 550 | return -ENODEV; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 551 | ret = ov7670_read(sd, REG_MIDL, &v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 552 | if (ret < 0) |
| 553 | return ret; |
| 554 | if (v != 0xa2) |
| 555 | return -ENODEV; |
| 556 | /* |
| 557 | * OK, we know we have an OmniVision chip...but which one? |
| 558 | */ |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 559 | ret = ov7670_read(sd, REG_PID, &v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 560 | if (ret < 0) |
| 561 | return ret; |
| 562 | if (v != 0x76) /* PID + VER = 0x76 / 0x73 */ |
| 563 | return -ENODEV; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 564 | ret = ov7670_read(sd, REG_VER, &v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 565 | if (ret < 0) |
| 566 | return ret; |
| 567 | if (v != 0x73) /* PID + VER = 0x76 / 0x73 */ |
| 568 | return -ENODEV; |
| 569 | return 0; |
| 570 | } |
| 571 | |
| 572 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 573 | /* |
| 574 | * Store information about the video data format. The color matrix |
| 575 | * is deeply tied into the format, so keep the relevant values here. |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 576 | * The magic matrix numbers come from OmniVision. |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 577 | */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 578 | static struct ov7670_format_struct { |
| 579 | __u8 *desc; |
| 580 | __u32 pixelformat; |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 581 | enum v4l2_mbus_pixelcode mbus_code; |
| 582 | enum v4l2_colorspace colorspace; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 583 | struct regval_list *regs; |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 584 | int cmatrix[CMATRIX_LEN]; |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 585 | int bpp; /* Bytes per pixel */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 586 | } ov7670_formats[] = { |
| 587 | { |
| 588 | .desc = "YUYV 4:2:2", |
| 589 | .pixelformat = V4L2_PIX_FMT_YUYV, |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 590 | .mbus_code = V4L2_MBUS_FMT_YUYV8_2X8, |
| 591 | .colorspace = V4L2_COLORSPACE_JPEG, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 592 | .regs = ov7670_fmt_yuv422, |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 593 | .cmatrix = { 128, -128, 0, -34, -94, 128 }, |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 594 | .bpp = 2, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 595 | }, |
| 596 | { |
| 597 | .desc = "RGB 444", |
| 598 | .pixelformat = V4L2_PIX_FMT_RGB444, |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 599 | .mbus_code = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE, |
| 600 | .colorspace = V4L2_COLORSPACE_SRGB, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 601 | .regs = ov7670_fmt_rgb444, |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 602 | .cmatrix = { 179, -179, 0, -61, -176, 228 }, |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 603 | .bpp = 2, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 604 | }, |
| 605 | { |
| 606 | .desc = "RGB 565", |
| 607 | .pixelformat = V4L2_PIX_FMT_RGB565, |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 608 | .mbus_code = V4L2_MBUS_FMT_RGB565_2X8_LE, |
| 609 | .colorspace = V4L2_COLORSPACE_SRGB, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 610 | .regs = ov7670_fmt_rgb565, |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 611 | .cmatrix = { 179, -179, 0, -61, -176, 228 }, |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 612 | .bpp = 2, |
| 613 | }, |
| 614 | { |
| 615 | .desc = "Raw RGB Bayer", |
| 616 | .pixelformat = V4L2_PIX_FMT_SBGGR8, |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 617 | .mbus_code = V4L2_MBUS_FMT_SBGGR8_1X8, |
| 618 | .colorspace = V4L2_COLORSPACE_SRGB, |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 619 | .regs = ov7670_fmt_raw, |
| 620 | .cmatrix = { 0, 0, 0, 0, 0, 0 }, |
| 621 | .bpp = 1 |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 622 | }, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 623 | }; |
Jonathan Corbet | 585553e | 2007-03-25 11:38:21 -0300 | [diff] [blame] | 624 | #define N_OV7670_FMTS ARRAY_SIZE(ov7670_formats) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 625 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 626 | |
| 627 | /* |
| 628 | * Then there is the issue of window sizes. Try to capture the info here. |
| 629 | */ |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 630 | |
| 631 | /* |
| 632 | * QCIF mode is done (by OV) in a very strange way - it actually looks like |
| 633 | * VGA with weird scaling options - they do *not* use the canned QCIF mode |
| 634 | * which is allegedly provided by the sensor. So here's the weird register |
| 635 | * settings. |
| 636 | */ |
| 637 | static struct regval_list ov7670_qcif_regs[] = { |
| 638 | { REG_COM3, COM3_SCALEEN|COM3_DCWEN }, |
| 639 | { REG_COM3, COM3_DCWEN }, |
| 640 | { REG_COM14, COM14_DCWEN | 0x01}, |
| 641 | { 0x73, 0xf1 }, |
| 642 | { 0xa2, 0x52 }, |
| 643 | { 0x7b, 0x1c }, |
| 644 | { 0x7c, 0x28 }, |
| 645 | { 0x7d, 0x3c }, |
| 646 | { 0x7f, 0x69 }, |
| 647 | { REG_COM9, 0x38 }, |
| 648 | { 0xa1, 0x0b }, |
| 649 | { 0x74, 0x19 }, |
| 650 | { 0x9a, 0x80 }, |
| 651 | { 0x43, 0x14 }, |
| 652 | { REG_COM13, 0xc0 }, |
| 653 | { 0xff, 0xff }, |
| 654 | }; |
| 655 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 656 | static struct ov7670_win_size { |
| 657 | int width; |
| 658 | int height; |
| 659 | unsigned char com7_bit; |
| 660 | int hstart; /* Start/stop values for the camera. Note */ |
| 661 | int hstop; /* that they do not always make complete */ |
| 662 | int vstart; /* sense to humans, but evidently the sensor */ |
| 663 | int vstop; /* will do the right thing... */ |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 664 | struct regval_list *regs; /* Regs to tweak */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 665 | /* h/vref stuff */ |
| 666 | } ov7670_win_sizes[] = { |
| 667 | /* VGA */ |
| 668 | { |
| 669 | .width = VGA_WIDTH, |
| 670 | .height = VGA_HEIGHT, |
| 671 | .com7_bit = COM7_FMT_VGA, |
| 672 | .hstart = 158, /* These values from */ |
| 673 | .hstop = 14, /* Omnivision */ |
| 674 | .vstart = 10, |
| 675 | .vstop = 490, |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 676 | .regs = NULL, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 677 | }, |
| 678 | /* CIF */ |
| 679 | { |
| 680 | .width = CIF_WIDTH, |
| 681 | .height = CIF_HEIGHT, |
| 682 | .com7_bit = COM7_FMT_CIF, |
| 683 | .hstart = 170, /* Empirically determined */ |
| 684 | .hstop = 90, |
| 685 | .vstart = 14, |
| 686 | .vstop = 494, |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 687 | .regs = NULL, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 688 | }, |
| 689 | /* QVGA */ |
| 690 | { |
| 691 | .width = QVGA_WIDTH, |
| 692 | .height = QVGA_HEIGHT, |
| 693 | .com7_bit = COM7_FMT_QVGA, |
| 694 | .hstart = 164, /* Empirically determined */ |
| 695 | .hstop = 20, |
| 696 | .vstart = 14, |
| 697 | .vstop = 494, |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 698 | .regs = NULL, |
| 699 | }, |
| 700 | /* QCIF */ |
| 701 | { |
| 702 | .width = QCIF_WIDTH, |
| 703 | .height = QCIF_HEIGHT, |
| 704 | .com7_bit = COM7_FMT_VGA, /* see comment above */ |
| 705 | .hstart = 456, /* Empirically determined */ |
| 706 | .hstop = 24, |
| 707 | .vstart = 14, |
| 708 | .vstop = 494, |
| 709 | .regs = ov7670_qcif_regs, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 710 | }, |
| 711 | }; |
| 712 | |
Robert P. J. Day | 0c71bf1 | 2007-06-05 05:20:56 -0300 | [diff] [blame] | 713 | #define N_WIN_SIZES (ARRAY_SIZE(ov7670_win_sizes)) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 714 | |
| 715 | |
| 716 | /* |
| 717 | * Store a set of start/stop values into the camera. |
| 718 | */ |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 719 | static int ov7670_set_hw(struct v4l2_subdev *sd, int hstart, int hstop, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 720 | int vstart, int vstop) |
| 721 | { |
| 722 | int ret; |
| 723 | unsigned char v; |
| 724 | /* |
| 725 | * Horizontal: 11 bits, top 8 live in hstart and hstop. Bottom 3 of |
| 726 | * hstart are in href[2:0], bottom 3 of hstop in href[5:3]. There is |
| 727 | * a mystery "edge offset" value in the top two bits of href. |
| 728 | */ |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 729 | ret = ov7670_write(sd, REG_HSTART, (hstart >> 3) & 0xff); |
| 730 | ret += ov7670_write(sd, REG_HSTOP, (hstop >> 3) & 0xff); |
| 731 | ret += ov7670_read(sd, REG_HREF, &v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 732 | v = (v & 0xc0) | ((hstop & 0x7) << 3) | (hstart & 0x7); |
| 733 | msleep(10); |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 734 | ret += ov7670_write(sd, REG_HREF, v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 735 | /* |
| 736 | * Vertical: similar arrangement, but only 10 bits. |
| 737 | */ |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 738 | ret += ov7670_write(sd, REG_VSTART, (vstart >> 2) & 0xff); |
| 739 | ret += ov7670_write(sd, REG_VSTOP, (vstop >> 2) & 0xff); |
| 740 | ret += ov7670_read(sd, REG_VREF, &v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 741 | v = (v & 0xf0) | ((vstop & 0x3) << 2) | (vstart & 0x3); |
| 742 | msleep(10); |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 743 | ret += ov7670_write(sd, REG_VREF, v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 744 | return ret; |
| 745 | } |
| 746 | |
| 747 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 748 | static int ov7670_enum_fmt(struct v4l2_subdev *sd, struct v4l2_fmtdesc *fmt) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 749 | { |
| 750 | struct ov7670_format_struct *ofmt; |
| 751 | |
| 752 | if (fmt->index >= N_OV7670_FMTS) |
| 753 | return -EINVAL; |
| 754 | |
| 755 | ofmt = ov7670_formats + fmt->index; |
| 756 | fmt->flags = 0; |
| 757 | strcpy(fmt->description, ofmt->desc); |
| 758 | fmt->pixelformat = ofmt->pixelformat; |
| 759 | return 0; |
| 760 | } |
| 761 | |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 762 | static int ov7670_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned index, |
| 763 | enum v4l2_mbus_pixelcode *code) |
| 764 | { |
| 765 | if (index >= N_OV7670_FMTS) |
| 766 | return -EINVAL; |
| 767 | |
| 768 | *code = ov7670_formats[index].mbus_code; |
| 769 | return 0; |
| 770 | } |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 771 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 772 | static int ov7670_try_fmt_internal(struct v4l2_subdev *sd, |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 773 | struct v4l2_mbus_framefmt *fmt, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 774 | struct ov7670_format_struct **ret_fmt, |
| 775 | struct ov7670_win_size **ret_wsize) |
| 776 | { |
| 777 | int index; |
| 778 | struct ov7670_win_size *wsize; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 779 | |
| 780 | for (index = 0; index < N_OV7670_FMTS; index++) |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 781 | if (ov7670_formats[index].mbus_code == fmt->code) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 782 | break; |
Daniel Drake | cd257a6 | 2008-06-30 20:57:39 -0300 | [diff] [blame] | 783 | if (index >= N_OV7670_FMTS) { |
| 784 | /* default to first format */ |
| 785 | index = 0; |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 786 | fmt->code = ov7670_formats[0].mbus_code; |
Daniel Drake | cd257a6 | 2008-06-30 20:57:39 -0300 | [diff] [blame] | 787 | } |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 788 | if (ret_fmt != NULL) |
| 789 | *ret_fmt = ov7670_formats + index; |
| 790 | /* |
| 791 | * Fields: the OV devices claim to be progressive. |
| 792 | */ |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 793 | fmt->field = V4L2_FIELD_NONE; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 794 | /* |
| 795 | * Round requested image size down to the nearest |
| 796 | * we support, but not below the smallest. |
| 797 | */ |
| 798 | for (wsize = ov7670_win_sizes; wsize < ov7670_win_sizes + N_WIN_SIZES; |
| 799 | wsize++) |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 800 | if (fmt->width >= wsize->width && fmt->height >= wsize->height) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 801 | break; |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 802 | if (wsize >= ov7670_win_sizes + N_WIN_SIZES) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 803 | wsize--; /* Take the smallest one */ |
| 804 | if (ret_wsize != NULL) |
| 805 | *ret_wsize = wsize; |
| 806 | /* |
| 807 | * Note the size we'll actually handle. |
| 808 | */ |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 809 | fmt->width = wsize->width; |
| 810 | fmt->height = wsize->height; |
| 811 | fmt->colorspace = ov7670_formats[index].colorspace; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 812 | return 0; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 813 | } |
| 814 | |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 815 | static int ov7670_try_mbus_fmt(struct v4l2_subdev *sd, |
| 816 | struct v4l2_mbus_framefmt *fmt) |
| 817 | { |
| 818 | return ov7670_try_fmt_internal(sd, fmt, NULL, NULL); |
| 819 | } |
| 820 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 821 | static int ov7670_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt) |
| 822 | { |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 823 | struct v4l2_mbus_framefmt mbus_fmt; |
| 824 | struct v4l2_pix_format *pix = &fmt->fmt.pix; |
| 825 | unsigned index; |
| 826 | int ret; |
| 827 | |
| 828 | for (index = 0; index < N_OV7670_FMTS; index++) |
| 829 | if (ov7670_formats[index].pixelformat == pix->pixelformat) |
| 830 | break; |
| 831 | if (index >= N_OV7670_FMTS) { |
| 832 | index = 0; |
| 833 | pix->pixelformat = ov7670_formats[index].pixelformat; |
| 834 | } |
| 835 | v4l2_fill_mbus_format(&mbus_fmt, pix, ov7670_formats[index].mbus_code); |
| 836 | ret = ov7670_try_fmt_internal(sd, &mbus_fmt, NULL, NULL); |
| 837 | v4l2_fill_pix_format(pix, &mbus_fmt); |
| 838 | pix->bytesperline = pix->width * ov7670_formats[index].bpp; |
| 839 | pix->sizeimage = pix->height * pix->bytesperline; |
| 840 | return ret; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 841 | } |
| 842 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 843 | /* |
| 844 | * Set a format. |
| 845 | */ |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 846 | static int ov7670_s_mbus_fmt(struct v4l2_subdev *sd, |
| 847 | struct v4l2_mbus_framefmt *fmt) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 848 | { |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 849 | struct ov7670_format_struct *ovfmt; |
| 850 | struct ov7670_win_size *wsize; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 851 | struct ov7670_info *info = to_state(sd); |
Jonathan Corbet | d8d2015 | 2009-12-20 11:39:47 -0300 | [diff] [blame] | 852 | unsigned char com7; |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 853 | int ret; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 854 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 855 | ret = ov7670_try_fmt_internal(sd, fmt, &ovfmt, &wsize); |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 856 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 857 | if (ret) |
| 858 | return ret; |
| 859 | /* |
| 860 | * COM7 is a pain in the ass, it doesn't like to be read then |
| 861 | * quickly written afterward. But we have everything we need |
| 862 | * to set it absolutely here, as long as the format-specific |
| 863 | * register sets list it first. |
| 864 | */ |
| 865 | com7 = ovfmt->regs[0].value; |
| 866 | com7 |= wsize->com7_bit; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 867 | ov7670_write(sd, REG_COM7, com7); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 868 | /* |
| 869 | * Now write the rest of the array. Also store start/stops |
| 870 | */ |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 871 | ov7670_write_array(sd, ovfmt->regs + 1); |
| 872 | ov7670_set_hw(sd, wsize->hstart, wsize->hstop, wsize->vstart, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 873 | wsize->vstop); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 874 | ret = 0; |
| 875 | if (wsize->regs) |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 876 | ret = ov7670_write_array(sd, wsize->regs); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 877 | info->fmt = ovfmt; |
Jonathan Corbet | edd75ed | 2007-05-22 00:39:00 -0300 | [diff] [blame] | 878 | |
Jonathan Corbet | d8d2015 | 2009-12-20 11:39:47 -0300 | [diff] [blame] | 879 | /* |
| 880 | * If we're running RGB565, we must rewrite clkrc after setting |
| 881 | * the other parameters or the image looks poor. If we're *not* |
| 882 | * doing RGB565, we must not rewrite clkrc or the image looks |
| 883 | * *really* poor. |
Jonathan Corbet | a8e68c3 | 2010-03-18 19:10:18 -0300 | [diff] [blame] | 884 | * |
| 885 | * (Update) Now that we retain clkrc state, we should be able |
| 886 | * to write it unconditionally, and that will make the frame |
| 887 | * rate persistent too. |
Jonathan Corbet | d8d2015 | 2009-12-20 11:39:47 -0300 | [diff] [blame] | 888 | */ |
Jonathan Corbet | a8e68c3 | 2010-03-18 19:10:18 -0300 | [diff] [blame] | 889 | if (ret == 0) |
Jonathan Corbet | d8d2015 | 2009-12-20 11:39:47 -0300 | [diff] [blame] | 890 | ret = ov7670_write(sd, REG_CLKRC, info->clkrc); |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 891 | return 0; |
| 892 | } |
| 893 | |
| 894 | static int ov7670_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt) |
| 895 | { |
| 896 | struct v4l2_mbus_framefmt mbus_fmt; |
| 897 | struct v4l2_pix_format *pix = &fmt->fmt.pix; |
| 898 | unsigned index; |
| 899 | int ret; |
| 900 | |
| 901 | for (index = 0; index < N_OV7670_FMTS; index++) |
| 902 | if (ov7670_formats[index].pixelformat == pix->pixelformat) |
| 903 | break; |
| 904 | if (index >= N_OV7670_FMTS) { |
| 905 | index = 0; |
| 906 | pix->pixelformat = ov7670_formats[index].pixelformat; |
| 907 | } |
| 908 | v4l2_fill_mbus_format(&mbus_fmt, pix, ov7670_formats[index].mbus_code); |
| 909 | ret = ov7670_s_mbus_fmt(sd, &mbus_fmt); |
| 910 | v4l2_fill_pix_format(pix, &mbus_fmt); |
Jonathan Corbet | edd75ed | 2007-05-22 00:39:00 -0300 | [diff] [blame] | 911 | return ret; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | /* |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 915 | * Implement G/S_PARM. There is a "high quality" mode we could try |
| 916 | * to do someday; for now, we just do the frame rate tweak. |
| 917 | */ |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 918 | static int ov7670_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms) |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 919 | { |
| 920 | struct v4l2_captureparm *cp = &parms->parm.capture; |
Jonathan Corbet | d8d2015 | 2009-12-20 11:39:47 -0300 | [diff] [blame] | 921 | struct ov7670_info *info = to_state(sd); |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 922 | |
| 923 | if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 924 | return -EINVAL; |
Jonathan Corbet | d8d2015 | 2009-12-20 11:39:47 -0300 | [diff] [blame] | 925 | |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 926 | memset(cp, 0, sizeof(struct v4l2_captureparm)); |
| 927 | cp->capability = V4L2_CAP_TIMEPERFRAME; |
| 928 | cp->timeperframe.numerator = 1; |
| 929 | cp->timeperframe.denominator = OV7670_FRAME_RATE; |
Jonathan Corbet | d8d2015 | 2009-12-20 11:39:47 -0300 | [diff] [blame] | 930 | if ((info->clkrc & CLK_EXT) == 0 && (info->clkrc & CLK_SCALE) > 1) |
| 931 | cp->timeperframe.denominator /= (info->clkrc & CLK_SCALE); |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 932 | return 0; |
| 933 | } |
| 934 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 935 | static int ov7670_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms) |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 936 | { |
| 937 | struct v4l2_captureparm *cp = &parms->parm.capture; |
| 938 | struct v4l2_fract *tpf = &cp->timeperframe; |
Jonathan Corbet | d8d2015 | 2009-12-20 11:39:47 -0300 | [diff] [blame] | 939 | struct ov7670_info *info = to_state(sd); |
Jonathan Corbet | 380de49 | 2010-03-26 13:09:34 -0300 | [diff] [blame] | 940 | int div; |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 941 | |
| 942 | if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 943 | return -EINVAL; |
| 944 | if (cp->extendedmode != 0) |
| 945 | return -EINVAL; |
Jonathan Corbet | d8d2015 | 2009-12-20 11:39:47 -0300 | [diff] [blame] | 946 | |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 947 | if (tpf->numerator == 0 || tpf->denominator == 0) |
| 948 | div = 1; /* Reset to full rate */ |
| 949 | else |
| 950 | div = (tpf->numerator*OV7670_FRAME_RATE)/tpf->denominator; |
| 951 | if (div == 0) |
| 952 | div = 1; |
| 953 | else if (div > CLK_SCALE) |
| 954 | div = CLK_SCALE; |
Jonathan Corbet | d8d2015 | 2009-12-20 11:39:47 -0300 | [diff] [blame] | 955 | info->clkrc = (info->clkrc & 0x80) | div; |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 956 | tpf->numerator = 1; |
| 957 | tpf->denominator = OV7670_FRAME_RATE/div; |
Jonathan Corbet | d8d2015 | 2009-12-20 11:39:47 -0300 | [diff] [blame] | 958 | return ov7670_write(sd, REG_CLKRC, info->clkrc); |
Jonathan Corbet | c8f5b2f5 | 2006-12-01 15:50:59 -0300 | [diff] [blame] | 959 | } |
| 960 | |
| 961 | |
| 962 | |
| 963 | /* |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 964 | * Code for dealing with controls. |
| 965 | */ |
| 966 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 967 | |
| 968 | |
| 969 | |
| 970 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 971 | static int ov7670_store_cmatrix(struct v4l2_subdev *sd, |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 972 | int matrix[CMATRIX_LEN]) |
| 973 | { |
| 974 | int i, ret; |
Hans Verkuil | e3bf20d | 2008-07-17 13:29:49 -0300 | [diff] [blame] | 975 | unsigned char signbits = 0; |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 976 | |
| 977 | /* |
| 978 | * Weird crap seems to exist in the upper part of |
| 979 | * the sign bits register, so let's preserve it. |
| 980 | */ |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 981 | ret = ov7670_read(sd, REG_CMATRIX_SIGN, &signbits); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 982 | signbits &= 0xc0; |
| 983 | |
| 984 | for (i = 0; i < CMATRIX_LEN; i++) { |
| 985 | unsigned char raw; |
| 986 | |
| 987 | if (matrix[i] < 0) { |
| 988 | signbits |= (1 << i); |
| 989 | if (matrix[i] < -255) |
| 990 | raw = 0xff; |
| 991 | else |
| 992 | raw = (-1 * matrix[i]) & 0xff; |
| 993 | } |
| 994 | else { |
| 995 | if (matrix[i] > 255) |
| 996 | raw = 0xff; |
| 997 | else |
| 998 | raw = matrix[i] & 0xff; |
| 999 | } |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1000 | ret += ov7670_write(sd, REG_CMATRIX_BASE + i, raw); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1001 | } |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1002 | ret += ov7670_write(sd, REG_CMATRIX_SIGN, signbits); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1003 | return ret; |
| 1004 | } |
| 1005 | |
| 1006 | |
| 1007 | /* |
| 1008 | * Hue also requires messing with the color matrix. It also requires |
| 1009 | * trig functions, which tend not to be well supported in the kernel. |
| 1010 | * So here is a simple table of sine values, 0-90 degrees, in steps |
| 1011 | * of five degrees. Values are multiplied by 1000. |
| 1012 | * |
| 1013 | * The following naive approximate trig functions require an argument |
| 1014 | * carefully limited to -180 <= theta <= 180. |
| 1015 | */ |
| 1016 | #define SIN_STEP 5 |
| 1017 | static const int ov7670_sin_table[] = { |
| 1018 | 0, 87, 173, 258, 342, 422, |
| 1019 | 499, 573, 642, 707, 766, 819, |
| 1020 | 866, 906, 939, 965, 984, 996, |
| 1021 | 1000 |
| 1022 | }; |
| 1023 | |
| 1024 | static int ov7670_sine(int theta) |
| 1025 | { |
| 1026 | int chs = 1; |
| 1027 | int sine; |
| 1028 | |
| 1029 | if (theta < 0) { |
| 1030 | theta = -theta; |
| 1031 | chs = -1; |
| 1032 | } |
| 1033 | if (theta <= 90) |
| 1034 | sine = ov7670_sin_table[theta/SIN_STEP]; |
| 1035 | else { |
| 1036 | theta -= 90; |
| 1037 | sine = 1000 - ov7670_sin_table[theta/SIN_STEP]; |
| 1038 | } |
| 1039 | return sine*chs; |
| 1040 | } |
| 1041 | |
| 1042 | static int ov7670_cosine(int theta) |
| 1043 | { |
| 1044 | theta = 90 - theta; |
| 1045 | if (theta > 180) |
| 1046 | theta -= 360; |
| 1047 | else if (theta < -180) |
| 1048 | theta += 360; |
| 1049 | return ov7670_sine(theta); |
| 1050 | } |
| 1051 | |
| 1052 | |
| 1053 | |
| 1054 | |
| 1055 | static void ov7670_calc_cmatrix(struct ov7670_info *info, |
| 1056 | int matrix[CMATRIX_LEN]) |
| 1057 | { |
| 1058 | int i; |
| 1059 | /* |
| 1060 | * Apply the current saturation setting first. |
| 1061 | */ |
| 1062 | for (i = 0; i < CMATRIX_LEN; i++) |
| 1063 | matrix[i] = (info->fmt->cmatrix[i]*info->sat) >> 7; |
| 1064 | /* |
| 1065 | * Then, if need be, rotate the hue value. |
| 1066 | */ |
| 1067 | if (info->hue != 0) { |
| 1068 | int sinth, costh, tmpmatrix[CMATRIX_LEN]; |
| 1069 | |
| 1070 | memcpy(tmpmatrix, matrix, CMATRIX_LEN*sizeof(int)); |
| 1071 | sinth = ov7670_sine(info->hue); |
| 1072 | costh = ov7670_cosine(info->hue); |
| 1073 | |
| 1074 | matrix[0] = (matrix[3]*sinth + matrix[0]*costh)/1000; |
| 1075 | matrix[1] = (matrix[4]*sinth + matrix[1]*costh)/1000; |
| 1076 | matrix[2] = (matrix[5]*sinth + matrix[2]*costh)/1000; |
| 1077 | matrix[3] = (matrix[3]*costh - matrix[0]*sinth)/1000; |
| 1078 | matrix[4] = (matrix[4]*costh - matrix[1]*sinth)/1000; |
| 1079 | matrix[5] = (matrix[5]*costh - matrix[2]*sinth)/1000; |
| 1080 | } |
| 1081 | } |
| 1082 | |
| 1083 | |
| 1084 | |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1085 | static int ov7670_s_sat(struct v4l2_subdev *sd, int value) |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1086 | { |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1087 | struct ov7670_info *info = to_state(sd); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1088 | int matrix[CMATRIX_LEN]; |
| 1089 | int ret; |
| 1090 | |
| 1091 | info->sat = value; |
| 1092 | ov7670_calc_cmatrix(info, matrix); |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1093 | ret = ov7670_store_cmatrix(sd, matrix); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1094 | return ret; |
| 1095 | } |
| 1096 | |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1097 | static int ov7670_g_sat(struct v4l2_subdev *sd, __s32 *value) |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1098 | { |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1099 | struct ov7670_info *info = to_state(sd); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1100 | |
| 1101 | *value = info->sat; |
| 1102 | return 0; |
| 1103 | } |
| 1104 | |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1105 | static int ov7670_s_hue(struct v4l2_subdev *sd, int value) |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1106 | { |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1107 | struct ov7670_info *info = to_state(sd); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1108 | int matrix[CMATRIX_LEN]; |
| 1109 | int ret; |
| 1110 | |
| 1111 | if (value < -180 || value > 180) |
| 1112 | return -EINVAL; |
| 1113 | info->hue = value; |
| 1114 | ov7670_calc_cmatrix(info, matrix); |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1115 | ret = ov7670_store_cmatrix(sd, matrix); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1116 | return ret; |
| 1117 | } |
| 1118 | |
| 1119 | |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1120 | static int ov7670_g_hue(struct v4l2_subdev *sd, __s32 *value) |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1121 | { |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1122 | struct ov7670_info *info = to_state(sd); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1123 | |
| 1124 | *value = info->hue; |
| 1125 | return 0; |
| 1126 | } |
| 1127 | |
| 1128 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1129 | /* |
| 1130 | * Some weird registers seem to store values in a sign/magnitude format! |
| 1131 | */ |
| 1132 | static unsigned char ov7670_sm_to_abs(unsigned char v) |
| 1133 | { |
| 1134 | if ((v & 0x80) == 0) |
| 1135 | return v + 128; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1136 | return 128 - (v & 0x7f); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1137 | } |
| 1138 | |
| 1139 | |
| 1140 | static unsigned char ov7670_abs_to_sm(unsigned char v) |
| 1141 | { |
| 1142 | if (v > 127) |
| 1143 | return v & 0x7f; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1144 | return (128 - v) | 0x80; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1145 | } |
| 1146 | |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1147 | static int ov7670_s_brightness(struct v4l2_subdev *sd, int value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1148 | { |
Hans Verkuil | e3bf20d | 2008-07-17 13:29:49 -0300 | [diff] [blame] | 1149 | unsigned char com8 = 0, v; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1150 | int ret; |
| 1151 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1152 | ov7670_read(sd, REG_COM8, &com8); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1153 | com8 &= ~COM8_AEC; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1154 | ov7670_write(sd, REG_COM8, com8); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1155 | v = ov7670_abs_to_sm(value); |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1156 | ret = ov7670_write(sd, REG_BRIGHT, v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1157 | return ret; |
| 1158 | } |
| 1159 | |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1160 | static int ov7670_g_brightness(struct v4l2_subdev *sd, __s32 *value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1161 | { |
Hans Verkuil | e3bf20d | 2008-07-17 13:29:49 -0300 | [diff] [blame] | 1162 | unsigned char v = 0; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1163 | int ret = ov7670_read(sd, REG_BRIGHT, &v); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1164 | |
| 1165 | *value = ov7670_sm_to_abs(v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1166 | return ret; |
| 1167 | } |
| 1168 | |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1169 | static int ov7670_s_contrast(struct v4l2_subdev *sd, int value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1170 | { |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1171 | return ov7670_write(sd, REG_CONTRAS, (unsigned char) value); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1172 | } |
| 1173 | |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1174 | static int ov7670_g_contrast(struct v4l2_subdev *sd, __s32 *value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1175 | { |
Hans Verkuil | e3bf20d | 2008-07-17 13:29:49 -0300 | [diff] [blame] | 1176 | unsigned char v = 0; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1177 | int ret = ov7670_read(sd, REG_CONTRAS, &v); |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1178 | |
| 1179 | *value = v; |
| 1180 | return ret; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1181 | } |
| 1182 | |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1183 | static int ov7670_g_hflip(struct v4l2_subdev *sd, __s32 *value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1184 | { |
| 1185 | int ret; |
Hans Verkuil | e3bf20d | 2008-07-17 13:29:49 -0300 | [diff] [blame] | 1186 | unsigned char v = 0; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1187 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1188 | ret = ov7670_read(sd, REG_MVFP, &v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1189 | *value = (v & MVFP_MIRROR) == MVFP_MIRROR; |
| 1190 | return ret; |
| 1191 | } |
| 1192 | |
| 1193 | |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1194 | static int ov7670_s_hflip(struct v4l2_subdev *sd, int value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1195 | { |
Hans Verkuil | e3bf20d | 2008-07-17 13:29:49 -0300 | [diff] [blame] | 1196 | unsigned char v = 0; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1197 | int ret; |
| 1198 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1199 | ret = ov7670_read(sd, REG_MVFP, &v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1200 | if (value) |
| 1201 | v |= MVFP_MIRROR; |
| 1202 | else |
| 1203 | v &= ~MVFP_MIRROR; |
| 1204 | msleep(10); /* FIXME */ |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1205 | ret += ov7670_write(sd, REG_MVFP, v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1206 | return ret; |
| 1207 | } |
| 1208 | |
| 1209 | |
| 1210 | |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1211 | static int ov7670_g_vflip(struct v4l2_subdev *sd, __s32 *value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1212 | { |
| 1213 | int ret; |
Hans Verkuil | e3bf20d | 2008-07-17 13:29:49 -0300 | [diff] [blame] | 1214 | unsigned char v = 0; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1215 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1216 | ret = ov7670_read(sd, REG_MVFP, &v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1217 | *value = (v & MVFP_FLIP) == MVFP_FLIP; |
| 1218 | return ret; |
| 1219 | } |
| 1220 | |
| 1221 | |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1222 | static int ov7670_s_vflip(struct v4l2_subdev *sd, int value) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1223 | { |
Hans Verkuil | e3bf20d | 2008-07-17 13:29:49 -0300 | [diff] [blame] | 1224 | unsigned char v = 0; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1225 | int ret; |
| 1226 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1227 | ret = ov7670_read(sd, REG_MVFP, &v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1228 | if (value) |
| 1229 | v |= MVFP_FLIP; |
| 1230 | else |
| 1231 | v &= ~MVFP_FLIP; |
| 1232 | msleep(10); /* FIXME */ |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1233 | ret += ov7670_write(sd, REG_MVFP, v); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1234 | return ret; |
| 1235 | } |
| 1236 | |
Jonathan Corbet | 8189867 | 2010-03-04 18:50:34 -0300 | [diff] [blame] | 1237 | /* |
| 1238 | * GAIN is split between REG_GAIN and REG_VREF[7:6]. If one believes |
| 1239 | * the data sheet, the VREF parts should be the most significant, but |
| 1240 | * experience shows otherwise. There seems to be little value in |
| 1241 | * messing with the VREF bits, so we leave them alone. |
| 1242 | */ |
| 1243 | static int ov7670_g_gain(struct v4l2_subdev *sd, __s32 *value) |
| 1244 | { |
| 1245 | int ret; |
| 1246 | unsigned char gain; |
| 1247 | |
| 1248 | ret = ov7670_read(sd, REG_GAIN, &gain); |
| 1249 | *value = gain; |
| 1250 | return ret; |
| 1251 | } |
| 1252 | |
| 1253 | static int ov7670_s_gain(struct v4l2_subdev *sd, int value) |
| 1254 | { |
| 1255 | int ret; |
| 1256 | unsigned char com8; |
| 1257 | |
| 1258 | ret = ov7670_write(sd, REG_GAIN, value & 0xff); |
| 1259 | /* Have to turn off AGC as well */ |
| 1260 | if (ret == 0) { |
| 1261 | ret = ov7670_read(sd, REG_COM8, &com8); |
| 1262 | ret = ov7670_write(sd, REG_COM8, com8 & ~COM8_AGC); |
| 1263 | } |
| 1264 | return ret; |
| 1265 | } |
| 1266 | |
| 1267 | /* |
| 1268 | * Tweak autogain. |
| 1269 | */ |
| 1270 | static int ov7670_g_autogain(struct v4l2_subdev *sd, __s32 *value) |
| 1271 | { |
| 1272 | int ret; |
| 1273 | unsigned char com8; |
| 1274 | |
| 1275 | ret = ov7670_read(sd, REG_COM8, &com8); |
| 1276 | *value = (com8 & COM8_AGC) != 0; |
| 1277 | return ret; |
| 1278 | } |
| 1279 | |
| 1280 | static int ov7670_s_autogain(struct v4l2_subdev *sd, int value) |
| 1281 | { |
| 1282 | int ret; |
| 1283 | unsigned char com8; |
| 1284 | |
| 1285 | ret = ov7670_read(sd, REG_COM8, &com8); |
| 1286 | if (ret == 0) { |
| 1287 | if (value) |
| 1288 | com8 |= COM8_AGC; |
| 1289 | else |
| 1290 | com8 &= ~COM8_AGC; |
| 1291 | ret = ov7670_write(sd, REG_COM8, com8); |
| 1292 | } |
| 1293 | return ret; |
| 1294 | } |
| 1295 | |
Jonathan Corbet | 364e933 | 2010-03-05 16:48:39 -0300 | [diff] [blame] | 1296 | /* |
| 1297 | * Exposure is spread all over the place: top 6 bits in AECHH, middle |
| 1298 | * 8 in AECH, and two stashed in COM1 just for the hell of it. |
| 1299 | */ |
| 1300 | static int ov7670_g_exp(struct v4l2_subdev *sd, __s32 *value) |
| 1301 | { |
| 1302 | int ret; |
| 1303 | unsigned char com1, aech, aechh; |
| 1304 | |
| 1305 | ret = ov7670_read(sd, REG_COM1, &com1) + |
| 1306 | ov7670_read(sd, REG_AECH, &aech) + |
| 1307 | ov7670_read(sd, REG_AECHH, &aechh); |
| 1308 | *value = ((aechh & 0x3f) << 10) | (aech << 2) | (com1 & 0x03); |
| 1309 | return ret; |
| 1310 | } |
| 1311 | |
| 1312 | static int ov7670_s_exp(struct v4l2_subdev *sd, int value) |
| 1313 | { |
| 1314 | int ret; |
| 1315 | unsigned char com1, com8, aech, aechh; |
| 1316 | |
| 1317 | ret = ov7670_read(sd, REG_COM1, &com1) + |
| 1318 | ov7670_read(sd, REG_COM8, &com8); |
| 1319 | ov7670_read(sd, REG_AECHH, &aechh); |
| 1320 | if (ret) |
| 1321 | return ret; |
| 1322 | |
| 1323 | com1 = (com1 & 0xfc) | (value & 0x03); |
| 1324 | aech = (value >> 2) & 0xff; |
| 1325 | aechh = (aechh & 0xc0) | ((value >> 10) & 0x3f); |
| 1326 | ret = ov7670_write(sd, REG_COM1, com1) + |
| 1327 | ov7670_write(sd, REG_AECH, aech) + |
| 1328 | ov7670_write(sd, REG_AECHH, aechh); |
| 1329 | /* Have to turn off AEC as well */ |
| 1330 | if (ret == 0) |
| 1331 | ret = ov7670_write(sd, REG_COM8, com8 & ~COM8_AEC); |
| 1332 | return ret; |
| 1333 | } |
| 1334 | |
| 1335 | /* |
| 1336 | * Tweak autoexposure. |
| 1337 | */ |
| 1338 | static int ov7670_g_autoexp(struct v4l2_subdev *sd, __s32 *value) |
| 1339 | { |
| 1340 | int ret; |
| 1341 | unsigned char com8; |
| 1342 | enum v4l2_exposure_auto_type *atype = (enum v4l2_exposure_auto_type *) value; |
| 1343 | |
| 1344 | ret = ov7670_read(sd, REG_COM8, &com8); |
| 1345 | if (com8 & COM8_AEC) |
Jonathan Corbet | 380de49 | 2010-03-26 13:09:34 -0300 | [diff] [blame] | 1346 | *atype = V4L2_EXPOSURE_AUTO; |
Jonathan Corbet | 364e933 | 2010-03-05 16:48:39 -0300 | [diff] [blame] | 1347 | else |
Jonathan Corbet | 380de49 | 2010-03-26 13:09:34 -0300 | [diff] [blame] | 1348 | *atype = V4L2_EXPOSURE_MANUAL; |
Jonathan Corbet | 364e933 | 2010-03-05 16:48:39 -0300 | [diff] [blame] | 1349 | return ret; |
| 1350 | } |
| 1351 | |
| 1352 | static int ov7670_s_autoexp(struct v4l2_subdev *sd, |
| 1353 | enum v4l2_exposure_auto_type value) |
| 1354 | { |
| 1355 | int ret; |
| 1356 | unsigned char com8; |
| 1357 | |
| 1358 | ret = ov7670_read(sd, REG_COM8, &com8); |
| 1359 | if (ret == 0) { |
| 1360 | if (value == V4L2_EXPOSURE_AUTO) |
| 1361 | com8 |= COM8_AEC; |
| 1362 | else |
| 1363 | com8 &= ~COM8_AEC; |
| 1364 | ret = ov7670_write(sd, REG_COM8, com8); |
| 1365 | } |
| 1366 | return ret; |
| 1367 | } |
| 1368 | |
Jonathan Corbet | 8189867 | 2010-03-04 18:50:34 -0300 | [diff] [blame] | 1369 | |
| 1370 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1371 | static int ov7670_queryctrl(struct v4l2_subdev *sd, |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1372 | struct v4l2_queryctrl *qc) |
| 1373 | { |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1374 | /* Fill in min, max, step and default value for these controls. */ |
| 1375 | switch (qc->id) { |
| 1376 | case V4L2_CID_BRIGHTNESS: |
| 1377 | return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128); |
| 1378 | case V4L2_CID_CONTRAST: |
| 1379 | return v4l2_ctrl_query_fill(qc, 0, 127, 1, 64); |
| 1380 | case V4L2_CID_VFLIP: |
| 1381 | case V4L2_CID_HFLIP: |
| 1382 | return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0); |
| 1383 | case V4L2_CID_SATURATION: |
| 1384 | return v4l2_ctrl_query_fill(qc, 0, 256, 1, 128); |
| 1385 | case V4L2_CID_HUE: |
| 1386 | return v4l2_ctrl_query_fill(qc, -180, 180, 5, 0); |
Jonathan Corbet | 8189867 | 2010-03-04 18:50:34 -0300 | [diff] [blame] | 1387 | case V4L2_CID_GAIN: |
| 1388 | return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128); |
| 1389 | case V4L2_CID_AUTOGAIN: |
| 1390 | return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); |
Jonathan Corbet | 364e933 | 2010-03-05 16:48:39 -0300 | [diff] [blame] | 1391 | case V4L2_CID_EXPOSURE: |
| 1392 | return v4l2_ctrl_query_fill(qc, 0, 65535, 1, 500); |
| 1393 | case V4L2_CID_EXPOSURE_AUTO: |
| 1394 | return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0); |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1395 | } |
| 1396 | return -EINVAL; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1397 | } |
| 1398 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1399 | static int ov7670_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1400 | { |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1401 | switch (ctrl->id) { |
| 1402 | case V4L2_CID_BRIGHTNESS: |
| 1403 | return ov7670_g_brightness(sd, &ctrl->value); |
| 1404 | case V4L2_CID_CONTRAST: |
| 1405 | return ov7670_g_contrast(sd, &ctrl->value); |
| 1406 | case V4L2_CID_SATURATION: |
| 1407 | return ov7670_g_sat(sd, &ctrl->value); |
| 1408 | case V4L2_CID_HUE: |
| 1409 | return ov7670_g_hue(sd, &ctrl->value); |
| 1410 | case V4L2_CID_VFLIP: |
| 1411 | return ov7670_g_vflip(sd, &ctrl->value); |
| 1412 | case V4L2_CID_HFLIP: |
| 1413 | return ov7670_g_hflip(sd, &ctrl->value); |
Jonathan Corbet | 8189867 | 2010-03-04 18:50:34 -0300 | [diff] [blame] | 1414 | case V4L2_CID_GAIN: |
| 1415 | return ov7670_g_gain(sd, &ctrl->value); |
| 1416 | case V4L2_CID_AUTOGAIN: |
| 1417 | return ov7670_g_autogain(sd, &ctrl->value); |
Jonathan Corbet | 364e933 | 2010-03-05 16:48:39 -0300 | [diff] [blame] | 1418 | case V4L2_CID_EXPOSURE: |
| 1419 | return ov7670_g_exp(sd, &ctrl->value); |
| 1420 | case V4L2_CID_EXPOSURE_AUTO: |
| 1421 | return ov7670_g_autoexp(sd, &ctrl->value); |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1422 | } |
| 1423 | return -EINVAL; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1424 | } |
| 1425 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1426 | static int ov7670_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1427 | { |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1428 | switch (ctrl->id) { |
| 1429 | case V4L2_CID_BRIGHTNESS: |
| 1430 | return ov7670_s_brightness(sd, ctrl->value); |
| 1431 | case V4L2_CID_CONTRAST: |
| 1432 | return ov7670_s_contrast(sd, ctrl->value); |
| 1433 | case V4L2_CID_SATURATION: |
| 1434 | return ov7670_s_sat(sd, ctrl->value); |
| 1435 | case V4L2_CID_HUE: |
| 1436 | return ov7670_s_hue(sd, ctrl->value); |
| 1437 | case V4L2_CID_VFLIP: |
| 1438 | return ov7670_s_vflip(sd, ctrl->value); |
| 1439 | case V4L2_CID_HFLIP: |
| 1440 | return ov7670_s_hflip(sd, ctrl->value); |
Jonathan Corbet | 8189867 | 2010-03-04 18:50:34 -0300 | [diff] [blame] | 1441 | case V4L2_CID_GAIN: |
| 1442 | return ov7670_s_gain(sd, ctrl->value); |
| 1443 | case V4L2_CID_AUTOGAIN: |
| 1444 | return ov7670_s_autogain(sd, ctrl->value); |
Jonathan Corbet | 364e933 | 2010-03-05 16:48:39 -0300 | [diff] [blame] | 1445 | case V4L2_CID_EXPOSURE: |
| 1446 | return ov7670_s_exp(sd, ctrl->value); |
| 1447 | case V4L2_CID_EXPOSURE_AUTO: |
| 1448 | return ov7670_s_autoexp(sd, |
| 1449 | (enum v4l2_exposure_auto_type) ctrl->value); |
Hans Verkuil | ca07561 | 2009-03-18 13:23:13 -0300 | [diff] [blame] | 1450 | } |
| 1451 | return -EINVAL; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1452 | } |
| 1453 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1454 | static int ov7670_g_chip_ident(struct v4l2_subdev *sd, |
| 1455 | struct v4l2_dbg_chip_ident *chip) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1456 | { |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1457 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 1458 | |
| 1459 | return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_OV7670, 0); |
| 1460 | } |
| 1461 | |
Hans Verkuil | b794aab | 2009-03-18 13:24:05 -0300 | [diff] [blame] | 1462 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
| 1463 | static int ov7670_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) |
| 1464 | { |
| 1465 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 1466 | unsigned char val = 0; |
| 1467 | int ret; |
| 1468 | |
| 1469 | if (!v4l2_chip_match_i2c_client(client, ®->match)) |
| 1470 | return -EINVAL; |
| 1471 | if (!capable(CAP_SYS_ADMIN)) |
| 1472 | return -EPERM; |
| 1473 | ret = ov7670_read(sd, reg->reg & 0xff, &val); |
| 1474 | reg->val = val; |
| 1475 | reg->size = 1; |
| 1476 | return ret; |
| 1477 | } |
| 1478 | |
| 1479 | static int ov7670_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) |
| 1480 | { |
| 1481 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 1482 | |
| 1483 | if (!v4l2_chip_match_i2c_client(client, ®->match)) |
| 1484 | return -EINVAL; |
| 1485 | if (!capable(CAP_SYS_ADMIN)) |
| 1486 | return -EPERM; |
| 1487 | ov7670_write(sd, reg->reg & 0xff, reg->val & 0xff); |
| 1488 | return 0; |
| 1489 | } |
| 1490 | #endif |
| 1491 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1492 | /* ----------------------------------------------------------------------- */ |
| 1493 | |
| 1494 | static const struct v4l2_subdev_core_ops ov7670_core_ops = { |
| 1495 | .g_chip_ident = ov7670_g_chip_ident, |
| 1496 | .g_ctrl = ov7670_g_ctrl, |
| 1497 | .s_ctrl = ov7670_s_ctrl, |
| 1498 | .queryctrl = ov7670_queryctrl, |
| 1499 | .reset = ov7670_reset, |
| 1500 | .init = ov7670_init, |
Hans Verkuil | b794aab | 2009-03-18 13:24:05 -0300 | [diff] [blame] | 1501 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
| 1502 | .g_register = ov7670_g_register, |
| 1503 | .s_register = ov7670_s_register, |
| 1504 | #endif |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1505 | }; |
| 1506 | |
| 1507 | static const struct v4l2_subdev_video_ops ov7670_video_ops = { |
| 1508 | .enum_fmt = ov7670_enum_fmt, |
| 1509 | .try_fmt = ov7670_try_fmt, |
| 1510 | .s_fmt = ov7670_s_fmt, |
Hans Verkuil | 959f3bd | 2010-05-08 18:28:41 -0300 | [diff] [blame^] | 1511 | .enum_mbus_fmt = ov7670_enum_mbus_fmt, |
| 1512 | .try_mbus_fmt = ov7670_try_mbus_fmt, |
| 1513 | .s_mbus_fmt = ov7670_s_mbus_fmt, |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1514 | .s_parm = ov7670_s_parm, |
| 1515 | .g_parm = ov7670_g_parm, |
| 1516 | }; |
| 1517 | |
| 1518 | static const struct v4l2_subdev_ops ov7670_ops = { |
| 1519 | .core = &ov7670_core_ops, |
| 1520 | .video = &ov7670_video_ops, |
| 1521 | }; |
| 1522 | |
| 1523 | /* ----------------------------------------------------------------------- */ |
| 1524 | |
| 1525 | static int ov7670_probe(struct i2c_client *client, |
| 1526 | const struct i2c_device_id *id) |
| 1527 | { |
| 1528 | struct v4l2_subdev *sd; |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1529 | struct ov7670_info *info; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1530 | int ret; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1531 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1532 | info = kzalloc(sizeof(struct ov7670_info), GFP_KERNEL); |
| 1533 | if (info == NULL) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1534 | return -ENOMEM; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1535 | sd = &info->sd; |
| 1536 | v4l2_i2c_subdev_init(sd, client, &ov7670_ops); |
| 1537 | |
| 1538 | /* Make sure it's an ov7670 */ |
| 1539 | ret = ov7670_detect(sd); |
| 1540 | if (ret) { |
| 1541 | v4l_dbg(1, debug, client, |
| 1542 | "chip found @ 0x%x (%s) is not an ov7670 chip.\n", |
| 1543 | client->addr << 1, client->adapter->name); |
| 1544 | kfree(info); |
| 1545 | return ret; |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1546 | } |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1547 | v4l_info(client, "chip found @ 0x%02x (%s)\n", |
| 1548 | client->addr << 1, client->adapter->name); |
| 1549 | |
Jonathan Corbet | f9a7615 | 2006-11-19 19:04:55 -0300 | [diff] [blame] | 1550 | info->fmt = &ov7670_formats[0]; |
| 1551 | info->sat = 128; /* Review this */ |
Jonathan Corbet | d8d2015 | 2009-12-20 11:39:47 -0300 | [diff] [blame] | 1552 | info->clkrc = 1; /* 30fps */ |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1553 | |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1554 | return 0; |
| 1555 | } |
| 1556 | |
| 1557 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1558 | static int ov7670_remove(struct i2c_client *client) |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1559 | { |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1560 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1561 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1562 | v4l2_device_unregister_subdev(sd); |
| 1563 | kfree(to_state(sd)); |
| 1564 | return 0; |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1565 | } |
| 1566 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1567 | static const struct i2c_device_id ov7670_id[] = { |
| 1568 | { "ov7670", 0 }, |
| 1569 | { } |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1570 | }; |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1571 | MODULE_DEVICE_TABLE(i2c, ov7670_id); |
Jonathan Corbet | 111f335 | 2006-11-04 09:26:00 -0300 | [diff] [blame] | 1572 | |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1573 | static struct v4l2_i2c_driver_data v4l2_i2c_data = { |
| 1574 | .name = "ov7670", |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1575 | .probe = ov7670_probe, |
| 1576 | .remove = ov7670_remove, |
Hans Verkuil | 14386c2 | 2009-03-18 13:01:06 -0300 | [diff] [blame] | 1577 | .id_table = ov7670_id, |
| 1578 | }; |