1 /* 2 * V4L2 subdevice driver for OmniVision OV6650 Camera Sensor 3 * 4 * Copyright (C) 2010 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> 5 * 6 * Based on OmniVision OV96xx Camera Driver 7 * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com> 8 * 9 * Based on ov772x camera driver: 10 * Copyright (C) 2008 Renesas Solutions Corp. 11 * Kuninori Morimoto <morimoto.kuninori@renesas.com> 12 * 13 * Based on ov7670 and soc_camera_platform driver, 14 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net> 15 * Copyright (C) 2008 Magnus Damm 16 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> 17 * 18 * Hardware specific bits initially based on former work by Matt Callow 19 * drivers/media/video/omap/sensor_ov6650.c 20 * Copyright (C) 2006 Matt Callow 21 * 22 * This program is free software; you can redistribute it and/or modify 23 * it under the terms of the GNU General Public License version 2 as 24 * published by the Free Software Foundation. 25 */ 26 27 #include <linux/bitops.h> 28 #include <linux/delay.h> 29 #include <linux/i2c.h> 30 #include <linux/slab.h> 31 #include <linux/v4l2-mediabus.h> 32 #include <linux/module.h> 33 34 #include <media/v4l2-clk.h> 35 #include <media/v4l2-ctrls.h> 36 #include <media/v4l2-device.h> 37 38 /* Register definitions */ 39 #define REG_GAIN 0x00 /* range 00 - 3F */ 40 #define REG_BLUE 0x01 41 #define REG_RED 0x02 42 #define REG_SAT 0x03 /* [7:4] saturation [0:3] reserved */ 43 #define REG_HUE 0x04 /* [7:6] rsrvd [5] hue en [4:0] hue */ 44 45 #define REG_BRT 0x06 46 47 #define REG_PIDH 0x0a 48 #define REG_PIDL 0x0b 49 50 #define REG_AECH 0x10 51 #define REG_CLKRC 0x11 /* Data Format and Internal Clock */ 52 /* [7:6] Input system clock (MHz)*/ 53 /* 00=8, 01=12, 10=16, 11=24 */ 54 /* [5:0]: Internal Clock Pre-Scaler */ 55 #define REG_COMA 0x12 /* [7] Reset */ 56 #define REG_COMB 0x13 57 #define REG_COMC 0x14 58 #define REG_COMD 0x15 59 #define REG_COML 0x16 60 #define REG_HSTRT 0x17 61 #define REG_HSTOP 0x18 62 #define REG_VSTRT 0x19 63 #define REG_VSTOP 0x1a 64 #define REG_PSHFT 0x1b 65 #define REG_MIDH 0x1c 66 #define REG_MIDL 0x1d 67 #define REG_HSYNS 0x1e 68 #define REG_HSYNE 0x1f 69 #define REG_COME 0x20 70 #define REG_YOFF 0x21 71 #define REG_UOFF 0x22 72 #define REG_VOFF 0x23 73 #define REG_AEW 0x24 74 #define REG_AEB 0x25 75 #define REG_COMF 0x26 76 #define REG_COMG 0x27 77 #define REG_COMH 0x28 78 #define REG_COMI 0x29 79 80 #define REG_FRARL 0x2b 81 #define REG_COMJ 0x2c 82 #define REG_COMK 0x2d 83 #define REG_AVGY 0x2e 84 #define REG_REF0 0x2f 85 #define REG_REF1 0x30 86 #define REG_REF2 0x31 87 #define REG_FRAJH 0x32 88 #define REG_FRAJL 0x33 89 #define REG_FACT 0x34 90 #define REG_L1AEC 0x35 91 #define REG_AVGU 0x36 92 #define REG_AVGV 0x37 93 94 #define REG_SPCB 0x60 95 #define REG_SPCC 0x61 96 #define REG_GAM1 0x62 97 #define REG_GAM2 0x63 98 #define REG_GAM3 0x64 99 #define REG_SPCD 0x65 100 101 #define REG_SPCE 0x68 102 #define REG_ADCL 0x69 103 104 #define REG_RMCO 0x6c 105 #define REG_GMCO 0x6d 106 #define REG_BMCO 0x6e 107 108 109 /* Register bits, values, etc. */ 110 #define OV6650_PIDH 0x66 /* high byte of product ID number */ 111 #define OV6650_PIDL 0x50 /* low byte of product ID number */ 112 #define OV6650_MIDH 0x7F /* high byte of mfg ID */ 113 #define OV6650_MIDL 0xA2 /* low byte of mfg ID */ 114 115 #define DEF_GAIN 0x00 116 #define DEF_BLUE 0x80 117 #define DEF_RED 0x80 118 119 #define SAT_SHIFT 4 120 #define SAT_MASK (0xf << SAT_SHIFT) 121 #define SET_SAT(x) (((x) << SAT_SHIFT) & SAT_MASK) 122 123 #define HUE_EN BIT(5) 124 #define HUE_MASK 0x1f 125 #define DEF_HUE 0x10 126 #define SET_HUE(x) (HUE_EN | ((x) & HUE_MASK)) 127 128 #define DEF_AECH 0x4D 129 130 #define CLKRC_6MHz 0x00 131 #define CLKRC_12MHz 0x40 132 #define CLKRC_16MHz 0x80 133 #define CLKRC_24MHz 0xc0 134 #define CLKRC_DIV_MASK 0x3f 135 #define GET_CLKRC_DIV(x) (((x) & CLKRC_DIV_MASK) + 1) 136 137 #define COMA_RESET BIT(7) 138 #define COMA_QCIF BIT(5) 139 #define COMA_RAW_RGB BIT(4) 140 #define COMA_RGB BIT(3) 141 #define COMA_BW BIT(2) 142 #define COMA_WORD_SWAP BIT(1) 143 #define COMA_BYTE_SWAP BIT(0) 144 #define DEF_COMA 0x00 145 146 #define COMB_FLIP_V BIT(7) 147 #define COMB_FLIP_H BIT(5) 148 #define COMB_BAND_FILTER BIT(4) 149 #define COMB_AWB BIT(2) 150 #define COMB_AGC BIT(1) 151 #define COMB_AEC BIT(0) 152 #define DEF_COMB 0x5f 153 154 #define COML_ONE_CHANNEL BIT(7) 155 156 #define DEF_HSTRT 0x24 157 #define DEF_HSTOP 0xd4 158 #define DEF_VSTRT 0x04 159 #define DEF_VSTOP 0x94 160 161 #define COMF_HREF_LOW BIT(4) 162 163 #define COMJ_PCLK_RISING BIT(4) 164 #define COMJ_VSYNC_HIGH BIT(0) 165 166 /* supported resolutions */ 167 #define W_QCIF (DEF_HSTOP - DEF_HSTRT) 168 #define W_CIF (W_QCIF << 1) 169 #define H_QCIF (DEF_VSTOP - DEF_VSTRT) 170 #define H_CIF (H_QCIF << 1) 171 172 #define FRAME_RATE_MAX 30 173 174 175 struct ov6650_reg { 176 u8 reg; 177 u8 val; 178 }; 179 180 struct ov6650 { 181 struct v4l2_subdev subdev; 182 struct v4l2_ctrl_handler hdl; 183 struct { 184 /* exposure/autoexposure cluster */ 185 struct v4l2_ctrl *autoexposure; 186 struct v4l2_ctrl *exposure; 187 }; 188 struct { 189 /* gain/autogain cluster */ 190 struct v4l2_ctrl *autogain; 191 struct v4l2_ctrl *gain; 192 }; 193 struct { 194 /* blue/red/autowhitebalance cluster */ 195 struct v4l2_ctrl *autowb; 196 struct v4l2_ctrl *blue; 197 struct v4l2_ctrl *red; 198 }; 199 struct v4l2_clk *clk; 200 bool half_scale; /* scale down output by 2 */ 201 struct v4l2_rect rect; /* sensor cropping window */ 202 unsigned long pclk_limit; /* from host */ 203 unsigned long pclk_max; /* from resolution and format */ 204 struct v4l2_fract tpf; /* as requested with s_frame_interval */ 205 u32 code; 206 enum v4l2_colorspace colorspace; 207 }; 208 209 210 static u32 ov6650_codes[] = { 211 MEDIA_BUS_FMT_YUYV8_2X8, 212 MEDIA_BUS_FMT_UYVY8_2X8, 213 MEDIA_BUS_FMT_YVYU8_2X8, 214 MEDIA_BUS_FMT_VYUY8_2X8, 215 MEDIA_BUS_FMT_SBGGR8_1X8, 216 MEDIA_BUS_FMT_Y8_1X8, 217 }; 218 219 /* read a register */ 220 static int ov6650_reg_read(struct i2c_client *client, u8 reg, u8 *val) 221 { 222 int ret; 223 u8 data = reg; 224 struct i2c_msg msg = { 225 .addr = client->addr, 226 .flags = 0, 227 .len = 1, 228 .buf = &data, 229 }; 230 231 ret = i2c_transfer(client->adapter, &msg, 1); 232 if (ret < 0) 233 goto err; 234 235 msg.flags = I2C_M_RD; 236 ret = i2c_transfer(client->adapter, &msg, 1); 237 if (ret < 0) 238 goto err; 239 240 *val = data; 241 return 0; 242 243 err: 244 dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg); 245 return ret; 246 } 247 248 /* write a register */ 249 static int ov6650_reg_write(struct i2c_client *client, u8 reg, u8 val) 250 { 251 int ret; 252 unsigned char data[2] = { reg, val }; 253 struct i2c_msg msg = { 254 .addr = client->addr, 255 .flags = 0, 256 .len = 2, 257 .buf = data, 258 }; 259 260 ret = i2c_transfer(client->adapter, &msg, 1); 261 udelay(100); 262 263 if (ret < 0) { 264 dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg); 265 return ret; 266 } 267 return 0; 268 } 269 270 271 /* Read a register, alter its bits, write it back */ 272 static int ov6650_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 mask) 273 { 274 u8 val; 275 int ret; 276 277 ret = ov6650_reg_read(client, reg, &val); 278 if (ret) { 279 dev_err(&client->dev, 280 "[Read]-Modify-Write of register 0x%02x failed!\n", 281 reg); 282 return ret; 283 } 284 285 val &= ~mask; 286 val |= set; 287 288 ret = ov6650_reg_write(client, reg, val); 289 if (ret) 290 dev_err(&client->dev, 291 "Read-Modify-[Write] of register 0x%02x failed!\n", 292 reg); 293 294 return ret; 295 } 296 297 static struct ov6650 *to_ov6650(const struct i2c_client *client) 298 { 299 return container_of(i2c_get_clientdata(client), struct ov6650, subdev); 300 } 301 302 /* Start/Stop streaming from the device */ 303 static int ov6650_s_stream(struct v4l2_subdev *sd, int enable) 304 { 305 return 0; 306 } 307 308 /* Get status of additional camera capabilities */ 309 static int ov6550_g_volatile_ctrl(struct v4l2_ctrl *ctrl) 310 { 311 struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl); 312 struct v4l2_subdev *sd = &priv->subdev; 313 struct i2c_client *client = v4l2_get_subdevdata(sd); 314 uint8_t reg, reg2; 315 int ret; 316 317 switch (ctrl->id) { 318 case V4L2_CID_AUTOGAIN: 319 ret = ov6650_reg_read(client, REG_GAIN, ®); 320 if (!ret) 321 priv->gain->val = reg; 322 return ret; 323 case V4L2_CID_AUTO_WHITE_BALANCE: 324 ret = ov6650_reg_read(client, REG_BLUE, ®); 325 if (!ret) 326 ret = ov6650_reg_read(client, REG_RED, ®2); 327 if (!ret) { 328 priv->blue->val = reg; 329 priv->red->val = reg2; 330 } 331 return ret; 332 case V4L2_CID_EXPOSURE_AUTO: 333 ret = ov6650_reg_read(client, REG_AECH, ®); 334 if (!ret) 335 priv->exposure->val = reg; 336 return ret; 337 } 338 return -EINVAL; 339 } 340 341 /* Set status of additional camera capabilities */ 342 static int ov6550_s_ctrl(struct v4l2_ctrl *ctrl) 343 { 344 struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl); 345 struct v4l2_subdev *sd = &priv->subdev; 346 struct i2c_client *client = v4l2_get_subdevdata(sd); 347 int ret; 348 349 switch (ctrl->id) { 350 case V4L2_CID_AUTOGAIN: 351 ret = ov6650_reg_rmw(client, REG_COMB, 352 ctrl->val ? COMB_AGC : 0, COMB_AGC); 353 if (!ret && !ctrl->val) 354 ret = ov6650_reg_write(client, REG_GAIN, priv->gain->val); 355 return ret; 356 case V4L2_CID_AUTO_WHITE_BALANCE: 357 ret = ov6650_reg_rmw(client, REG_COMB, 358 ctrl->val ? COMB_AWB : 0, COMB_AWB); 359 if (!ret && !ctrl->val) { 360 ret = ov6650_reg_write(client, REG_BLUE, priv->blue->val); 361 if (!ret) 362 ret = ov6650_reg_write(client, REG_RED, 363 priv->red->val); 364 } 365 return ret; 366 case V4L2_CID_SATURATION: 367 return ov6650_reg_rmw(client, REG_SAT, SET_SAT(ctrl->val), 368 SAT_MASK); 369 case V4L2_CID_HUE: 370 return ov6650_reg_rmw(client, REG_HUE, SET_HUE(ctrl->val), 371 HUE_MASK); 372 case V4L2_CID_BRIGHTNESS: 373 return ov6650_reg_write(client, REG_BRT, ctrl->val); 374 case V4L2_CID_EXPOSURE_AUTO: 375 ret = ov6650_reg_rmw(client, REG_COMB, ctrl->val == 376 V4L2_EXPOSURE_AUTO ? COMB_AEC : 0, COMB_AEC); 377 if (!ret && ctrl->val == V4L2_EXPOSURE_MANUAL) 378 ret = ov6650_reg_write(client, REG_AECH, 379 priv->exposure->val); 380 return ret; 381 case V4L2_CID_GAMMA: 382 return ov6650_reg_write(client, REG_GAM1, ctrl->val); 383 case V4L2_CID_VFLIP: 384 return ov6650_reg_rmw(client, REG_COMB, 385 ctrl->val ? COMB_FLIP_V : 0, COMB_FLIP_V); 386 case V4L2_CID_HFLIP: 387 return ov6650_reg_rmw(client, REG_COMB, 388 ctrl->val ? COMB_FLIP_H : 0, COMB_FLIP_H); 389 } 390 391 return -EINVAL; 392 } 393 394 #ifdef CONFIG_VIDEO_ADV_DEBUG 395 static int ov6650_get_register(struct v4l2_subdev *sd, 396 struct v4l2_dbg_register *reg) 397 { 398 struct i2c_client *client = v4l2_get_subdevdata(sd); 399 int ret; 400 u8 val; 401 402 if (reg->reg & ~0xff) 403 return -EINVAL; 404 405 reg->size = 1; 406 407 ret = ov6650_reg_read(client, reg->reg, &val); 408 if (!ret) 409 reg->val = (__u64)val; 410 411 return ret; 412 } 413 414 static int ov6650_set_register(struct v4l2_subdev *sd, 415 const struct v4l2_dbg_register *reg) 416 { 417 struct i2c_client *client = v4l2_get_subdevdata(sd); 418 419 if (reg->reg & ~0xff || reg->val & ~0xff) 420 return -EINVAL; 421 422 return ov6650_reg_write(client, reg->reg, reg->val); 423 } 424 #endif 425 426 static int ov6650_s_power(struct v4l2_subdev *sd, int on) 427 { 428 struct i2c_client *client = v4l2_get_subdevdata(sd); 429 struct ov6650 *priv = to_ov6650(client); 430 int ret = 0; 431 432 if (on) 433 ret = v4l2_clk_enable(priv->clk); 434 else 435 v4l2_clk_disable(priv->clk); 436 437 return ret; 438 } 439 440 static int ov6650_get_selection(struct v4l2_subdev *sd, 441 struct v4l2_subdev_pad_config *cfg, 442 struct v4l2_subdev_selection *sel) 443 { 444 struct i2c_client *client = v4l2_get_subdevdata(sd); 445 struct ov6650 *priv = to_ov6650(client); 446 447 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) 448 return -EINVAL; 449 450 switch (sel->target) { 451 case V4L2_SEL_TGT_CROP_BOUNDS: 452 sel->r.left = DEF_HSTRT << 1; 453 sel->r.top = DEF_VSTRT << 1; 454 sel->r.width = W_CIF; 455 sel->r.height = H_CIF; 456 return 0; 457 case V4L2_SEL_TGT_CROP: 458 sel->r = priv->rect; 459 return 0; 460 default: 461 return -EINVAL; 462 } 463 } 464 465 static int ov6650_set_selection(struct v4l2_subdev *sd, 466 struct v4l2_subdev_pad_config *cfg, 467 struct v4l2_subdev_selection *sel) 468 { 469 struct i2c_client *client = v4l2_get_subdevdata(sd); 470 struct ov6650 *priv = to_ov6650(client); 471 struct v4l2_rect rect = sel->r; 472 int ret; 473 474 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE || 475 sel->target != V4L2_SEL_TGT_CROP) 476 return -EINVAL; 477 478 v4l_bound_align_image(&rect.width, 2, W_CIF, 1, 479 &rect.height, 2, H_CIF, 1, 0); 480 v4l_bound_align_image(&rect.left, DEF_HSTRT << 1, 481 (DEF_HSTRT << 1) + W_CIF - (__s32)rect.width, 1, 482 &rect.top, DEF_VSTRT << 1, 483 (DEF_VSTRT << 1) + H_CIF - (__s32)rect.height, 1, 484 0); 485 486 ret = ov6650_reg_write(client, REG_HSTRT, rect.left >> 1); 487 if (!ret) { 488 priv->rect.left = rect.left; 489 ret = ov6650_reg_write(client, REG_HSTOP, 490 (rect.left + rect.width) >> 1); 491 } 492 if (!ret) { 493 priv->rect.width = rect.width; 494 ret = ov6650_reg_write(client, REG_VSTRT, rect.top >> 1); 495 } 496 if (!ret) { 497 priv->rect.top = rect.top; 498 ret = ov6650_reg_write(client, REG_VSTOP, 499 (rect.top + rect.height) >> 1); 500 } 501 if (!ret) 502 priv->rect.height = rect.height; 503 504 return ret; 505 } 506 507 static int ov6650_get_fmt(struct v4l2_subdev *sd, 508 struct v4l2_subdev_pad_config *cfg, 509 struct v4l2_subdev_format *format) 510 { 511 struct v4l2_mbus_framefmt *mf = &format->format; 512 struct i2c_client *client = v4l2_get_subdevdata(sd); 513 struct ov6650 *priv = to_ov6650(client); 514 515 if (format->pad) 516 return -EINVAL; 517 518 mf->width = priv->rect.width >> priv->half_scale; 519 mf->height = priv->rect.height >> priv->half_scale; 520 mf->code = priv->code; 521 mf->colorspace = priv->colorspace; 522 mf->field = V4L2_FIELD_NONE; 523 524 return 0; 525 } 526 527 static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect) 528 { 529 return width > rect->width >> 1 || height > rect->height >> 1; 530 } 531 532 static u8 to_clkrc(struct v4l2_fract *timeperframe, 533 unsigned long pclk_limit, unsigned long pclk_max) 534 { 535 unsigned long pclk; 536 537 if (timeperframe->numerator && timeperframe->denominator) 538 pclk = pclk_max * timeperframe->denominator / 539 (FRAME_RATE_MAX * timeperframe->numerator); 540 else 541 pclk = pclk_max; 542 543 if (pclk_limit && pclk_limit < pclk) 544 pclk = pclk_limit; 545 546 return (pclk_max - 1) / pclk; 547 } 548 549 /* set the format we will capture in */ 550 static int ov6650_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf) 551 { 552 struct i2c_client *client = v4l2_get_subdevdata(sd); 553 struct ov6650 *priv = to_ov6650(client); 554 bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect); 555 struct v4l2_subdev_selection sel = { 556 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 557 .target = V4L2_SEL_TGT_CROP, 558 .r.left = priv->rect.left + (priv->rect.width >> 1) - 559 (mf->width >> (1 - half_scale)), 560 .r.top = priv->rect.top + (priv->rect.height >> 1) - 561 (mf->height >> (1 - half_scale)), 562 .r.width = mf->width << half_scale, 563 .r.height = mf->height << half_scale, 564 }; 565 u32 code = mf->code; 566 unsigned long mclk, pclk; 567 u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask, clkrc; 568 int ret; 569 570 /* select color matrix configuration for given color encoding */ 571 switch (code) { 572 case MEDIA_BUS_FMT_Y8_1X8: 573 dev_dbg(&client->dev, "pixel format GREY8_1X8\n"); 574 coma_mask |= COMA_RGB | COMA_WORD_SWAP | COMA_BYTE_SWAP; 575 coma_set |= COMA_BW; 576 break; 577 case MEDIA_BUS_FMT_YUYV8_2X8: 578 dev_dbg(&client->dev, "pixel format YUYV8_2X8_LE\n"); 579 coma_mask |= COMA_RGB | COMA_BW | COMA_BYTE_SWAP; 580 coma_set |= COMA_WORD_SWAP; 581 break; 582 case MEDIA_BUS_FMT_YVYU8_2X8: 583 dev_dbg(&client->dev, "pixel format YVYU8_2X8_LE (untested)\n"); 584 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP | 585 COMA_BYTE_SWAP; 586 break; 587 case MEDIA_BUS_FMT_UYVY8_2X8: 588 dev_dbg(&client->dev, "pixel format YUYV8_2X8_BE\n"); 589 if (half_scale) { 590 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP; 591 coma_set |= COMA_BYTE_SWAP; 592 } else { 593 coma_mask |= COMA_RGB | COMA_BW; 594 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP; 595 } 596 break; 597 case MEDIA_BUS_FMT_VYUY8_2X8: 598 dev_dbg(&client->dev, "pixel format YVYU8_2X8_BE (untested)\n"); 599 if (half_scale) { 600 coma_mask |= COMA_RGB | COMA_BW; 601 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP; 602 } else { 603 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP; 604 coma_set |= COMA_BYTE_SWAP; 605 } 606 break; 607 case MEDIA_BUS_FMT_SBGGR8_1X8: 608 dev_dbg(&client->dev, "pixel format SBGGR8_1X8 (untested)\n"); 609 coma_mask |= COMA_BW | COMA_BYTE_SWAP | COMA_WORD_SWAP; 610 coma_set |= COMA_RAW_RGB | COMA_RGB; 611 break; 612 default: 613 dev_err(&client->dev, "Pixel format not handled: 0x%x\n", code); 614 return -EINVAL; 615 } 616 priv->code = code; 617 618 if (code == MEDIA_BUS_FMT_Y8_1X8 || 619 code == MEDIA_BUS_FMT_SBGGR8_1X8) { 620 coml_mask = COML_ONE_CHANNEL; 621 coml_set = 0; 622 priv->pclk_max = 4000000; 623 } else { 624 coml_mask = 0; 625 coml_set = COML_ONE_CHANNEL; 626 priv->pclk_max = 8000000; 627 } 628 629 if (code == MEDIA_BUS_FMT_SBGGR8_1X8) 630 priv->colorspace = V4L2_COLORSPACE_SRGB; 631 else if (code != 0) 632 priv->colorspace = V4L2_COLORSPACE_JPEG; 633 634 if (half_scale) { 635 dev_dbg(&client->dev, "max resolution: QCIF\n"); 636 coma_set |= COMA_QCIF; 637 priv->pclk_max /= 2; 638 } else { 639 dev_dbg(&client->dev, "max resolution: CIF\n"); 640 coma_mask |= COMA_QCIF; 641 } 642 priv->half_scale = half_scale; 643 644 clkrc = CLKRC_12MHz; 645 mclk = 12000000; 646 priv->pclk_limit = 1334000; 647 dev_dbg(&client->dev, "using 12MHz input clock\n"); 648 649 clkrc |= to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max); 650 651 pclk = priv->pclk_max / GET_CLKRC_DIV(clkrc); 652 dev_dbg(&client->dev, "pixel clock divider: %ld.%ld\n", 653 mclk / pclk, 10 * mclk % pclk / pclk); 654 655 ret = ov6650_set_selection(sd, NULL, &sel); 656 if (!ret) 657 ret = ov6650_reg_rmw(client, REG_COMA, coma_set, coma_mask); 658 if (!ret) 659 ret = ov6650_reg_write(client, REG_CLKRC, clkrc); 660 if (!ret) 661 ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask); 662 663 if (!ret) { 664 mf->colorspace = priv->colorspace; 665 mf->width = priv->rect.width >> half_scale; 666 mf->height = priv->rect.height >> half_scale; 667 } 668 return ret; 669 } 670 671 static int ov6650_set_fmt(struct v4l2_subdev *sd, 672 struct v4l2_subdev_pad_config *cfg, 673 struct v4l2_subdev_format *format) 674 { 675 struct v4l2_mbus_framefmt *mf = &format->format; 676 struct i2c_client *client = v4l2_get_subdevdata(sd); 677 struct ov6650 *priv = to_ov6650(client); 678 679 if (format->pad) 680 return -EINVAL; 681 682 if (is_unscaled_ok(mf->width, mf->height, &priv->rect)) 683 v4l_bound_align_image(&mf->width, 2, W_CIF, 1, 684 &mf->height, 2, H_CIF, 1, 0); 685 686 mf->field = V4L2_FIELD_NONE; 687 688 switch (mf->code) { 689 case MEDIA_BUS_FMT_Y10_1X10: 690 mf->code = MEDIA_BUS_FMT_Y8_1X8; 691 /* fall through */ 692 case MEDIA_BUS_FMT_Y8_1X8: 693 case MEDIA_BUS_FMT_YVYU8_2X8: 694 case MEDIA_BUS_FMT_YUYV8_2X8: 695 case MEDIA_BUS_FMT_VYUY8_2X8: 696 case MEDIA_BUS_FMT_UYVY8_2X8: 697 mf->colorspace = V4L2_COLORSPACE_JPEG; 698 break; 699 default: 700 mf->code = MEDIA_BUS_FMT_SBGGR8_1X8; 701 /* fall through */ 702 case MEDIA_BUS_FMT_SBGGR8_1X8: 703 mf->colorspace = V4L2_COLORSPACE_SRGB; 704 break; 705 } 706 707 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) 708 return ov6650_s_fmt(sd, mf); 709 cfg->try_fmt = *mf; 710 711 return 0; 712 } 713 714 static int ov6650_enum_mbus_code(struct v4l2_subdev *sd, 715 struct v4l2_subdev_pad_config *cfg, 716 struct v4l2_subdev_mbus_code_enum *code) 717 { 718 if (code->pad || code->index >= ARRAY_SIZE(ov6650_codes)) 719 return -EINVAL; 720 721 code->code = ov6650_codes[code->index]; 722 return 0; 723 } 724 725 static int ov6650_g_frame_interval(struct v4l2_subdev *sd, 726 struct v4l2_subdev_frame_interval *ival) 727 { 728 struct i2c_client *client = v4l2_get_subdevdata(sd); 729 struct ov6650 *priv = to_ov6650(client); 730 731 ival->interval.numerator = GET_CLKRC_DIV(to_clkrc(&priv->tpf, 732 priv->pclk_limit, priv->pclk_max)); 733 ival->interval.denominator = FRAME_RATE_MAX; 734 735 dev_dbg(&client->dev, "Frame interval: %u/%u s\n", 736 ival->interval.numerator, ival->interval.denominator); 737 738 return 0; 739 } 740 741 static int ov6650_s_frame_interval(struct v4l2_subdev *sd, 742 struct v4l2_subdev_frame_interval *ival) 743 { 744 struct i2c_client *client = v4l2_get_subdevdata(sd); 745 struct ov6650 *priv = to_ov6650(client); 746 struct v4l2_fract *tpf = &ival->interval; 747 int div, ret; 748 u8 clkrc; 749 750 if (tpf->numerator == 0 || tpf->denominator == 0) 751 div = 1; /* Reset to full rate */ 752 else 753 div = (tpf->numerator * FRAME_RATE_MAX) / tpf->denominator; 754 755 if (div == 0) 756 div = 1; 757 else if (div > GET_CLKRC_DIV(CLKRC_DIV_MASK)) 758 div = GET_CLKRC_DIV(CLKRC_DIV_MASK); 759 760 /* 761 * Keep result to be used as tpf limit 762 * for subsequent clock divider calculations 763 */ 764 priv->tpf.numerator = div; 765 priv->tpf.denominator = FRAME_RATE_MAX; 766 767 clkrc = to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max); 768 769 ret = ov6650_reg_rmw(client, REG_CLKRC, clkrc, CLKRC_DIV_MASK); 770 if (!ret) { 771 tpf->numerator = GET_CLKRC_DIV(clkrc); 772 tpf->denominator = FRAME_RATE_MAX; 773 } 774 775 return ret; 776 } 777 778 /* Soft reset the camera. This has nothing to do with the RESET pin! */ 779 static int ov6650_reset(struct i2c_client *client) 780 { 781 int ret; 782 783 dev_dbg(&client->dev, "reset\n"); 784 785 ret = ov6650_reg_rmw(client, REG_COMA, COMA_RESET, 0); 786 if (ret) 787 dev_err(&client->dev, 788 "An error occurred while entering soft reset!\n"); 789 790 return ret; 791 } 792 793 /* program default register values */ 794 static int ov6650_prog_dflt(struct i2c_client *client) 795 { 796 int ret; 797 798 dev_dbg(&client->dev, "initializing\n"); 799 800 ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */ 801 if (!ret) 802 ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_BAND_FILTER); 803 804 return ret; 805 } 806 807 static int ov6650_video_probe(struct v4l2_subdev *sd) 808 { 809 struct i2c_client *client = v4l2_get_subdevdata(sd); 810 struct ov6650 *priv = to_ov6650(client); 811 u8 pidh, pidl, midh, midl; 812 int ret; 813 814 priv->clk = v4l2_clk_get(&client->dev, NULL); 815 if (IS_ERR(priv->clk)) { 816 ret = PTR_ERR(priv->clk); 817 dev_err(&client->dev, "v4l2_clk request err: %d\n", ret); 818 return ret; 819 } 820 821 ret = ov6650_s_power(sd, 1); 822 if (ret < 0) 823 goto eclkput; 824 825 msleep(20); 826 827 /* 828 * check and show product ID and manufacturer ID 829 */ 830 ret = ov6650_reg_read(client, REG_PIDH, &pidh); 831 if (!ret) 832 ret = ov6650_reg_read(client, REG_PIDL, &pidl); 833 if (!ret) 834 ret = ov6650_reg_read(client, REG_MIDH, &midh); 835 if (!ret) 836 ret = ov6650_reg_read(client, REG_MIDL, &midl); 837 838 if (ret) 839 goto done; 840 841 if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) { 842 dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n", 843 pidh, pidl); 844 ret = -ENODEV; 845 goto done; 846 } 847 848 dev_info(&client->dev, 849 "ov6650 Product ID 0x%02x:0x%02x Manufacturer ID 0x%02x:0x%02x\n", 850 pidh, pidl, midh, midl); 851 852 ret = ov6650_reset(client); 853 if (!ret) 854 ret = ov6650_prog_dflt(client); 855 if (!ret) 856 ret = v4l2_ctrl_handler_setup(&priv->hdl); 857 858 done: 859 ov6650_s_power(sd, 0); 860 if (!ret) 861 return 0; 862 eclkput: 863 v4l2_clk_put(priv->clk); 864 865 return ret; 866 } 867 868 static const struct v4l2_ctrl_ops ov6550_ctrl_ops = { 869 .g_volatile_ctrl = ov6550_g_volatile_ctrl, 870 .s_ctrl = ov6550_s_ctrl, 871 }; 872 873 static const struct v4l2_subdev_core_ops ov6650_core_ops = { 874 #ifdef CONFIG_VIDEO_ADV_DEBUG 875 .g_register = ov6650_get_register, 876 .s_register = ov6650_set_register, 877 #endif 878 .s_power = ov6650_s_power, 879 }; 880 881 /* Request bus settings on camera side */ 882 static int ov6650_g_mbus_config(struct v4l2_subdev *sd, 883 struct v4l2_mbus_config *cfg) 884 { 885 886 cfg->flags = V4L2_MBUS_MASTER | 887 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING | 888 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW | 889 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW | 890 V4L2_MBUS_DATA_ACTIVE_HIGH; 891 cfg->type = V4L2_MBUS_PARALLEL; 892 893 return 0; 894 } 895 896 /* Alter bus settings on camera side */ 897 static int ov6650_s_mbus_config(struct v4l2_subdev *sd, 898 const struct v4l2_mbus_config *cfg) 899 { 900 struct i2c_client *client = v4l2_get_subdevdata(sd); 901 int ret; 902 903 if (cfg->flags & V4L2_MBUS_PCLK_SAMPLE_RISING) 904 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_PCLK_RISING, 0); 905 else 906 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_PCLK_RISING); 907 if (ret) 908 return ret; 909 910 if (cfg->flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) 911 ret = ov6650_reg_rmw(client, REG_COMF, COMF_HREF_LOW, 0); 912 else 913 ret = ov6650_reg_rmw(client, REG_COMF, 0, COMF_HREF_LOW); 914 if (ret) 915 return ret; 916 917 if (cfg->flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) 918 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_VSYNC_HIGH, 0); 919 else 920 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_VSYNC_HIGH); 921 922 return ret; 923 } 924 925 static const struct v4l2_subdev_video_ops ov6650_video_ops = { 926 .s_stream = ov6650_s_stream, 927 .g_frame_interval = ov6650_g_frame_interval, 928 .s_frame_interval = ov6650_s_frame_interval, 929 .g_mbus_config = ov6650_g_mbus_config, 930 .s_mbus_config = ov6650_s_mbus_config, 931 }; 932 933 static const struct v4l2_subdev_pad_ops ov6650_pad_ops = { 934 .enum_mbus_code = ov6650_enum_mbus_code, 935 .get_selection = ov6650_get_selection, 936 .set_selection = ov6650_set_selection, 937 .get_fmt = ov6650_get_fmt, 938 .set_fmt = ov6650_set_fmt, 939 }; 940 941 static const struct v4l2_subdev_ops ov6650_subdev_ops = { 942 .core = &ov6650_core_ops, 943 .video = &ov6650_video_ops, 944 .pad = &ov6650_pad_ops, 945 }; 946 947 static const struct v4l2_subdev_internal_ops ov6650_internal_ops = { 948 .registered = ov6650_video_probe, 949 }; 950 951 /* 952 * i2c_driver function 953 */ 954 static int ov6650_probe(struct i2c_client *client, 955 const struct i2c_device_id *did) 956 { 957 struct ov6650 *priv; 958 int ret; 959 960 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL); 961 if (!priv) 962 return -ENOMEM; 963 964 v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops); 965 v4l2_ctrl_handler_init(&priv->hdl, 13); 966 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 967 V4L2_CID_VFLIP, 0, 1, 1, 0); 968 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 969 V4L2_CID_HFLIP, 0, 1, 1, 0); 970 priv->autogain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 971 V4L2_CID_AUTOGAIN, 0, 1, 1, 1); 972 priv->gain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 973 V4L2_CID_GAIN, 0, 0x3f, 1, DEF_GAIN); 974 priv->autowb = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 975 V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1); 976 priv->blue = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 977 V4L2_CID_BLUE_BALANCE, 0, 0xff, 1, DEF_BLUE); 978 priv->red = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 979 V4L2_CID_RED_BALANCE, 0, 0xff, 1, DEF_RED); 980 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 981 V4L2_CID_SATURATION, 0, 0xf, 1, 0x8); 982 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 983 V4L2_CID_HUE, 0, HUE_MASK, 1, DEF_HUE); 984 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 985 V4L2_CID_BRIGHTNESS, 0, 0xff, 1, 0x80); 986 priv->autoexposure = v4l2_ctrl_new_std_menu(&priv->hdl, 987 &ov6550_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 988 V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO); 989 priv->exposure = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 990 V4L2_CID_EXPOSURE, 0, 0xff, 1, DEF_AECH); 991 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 992 V4L2_CID_GAMMA, 0, 0xff, 1, 0x12); 993 994 priv->subdev.ctrl_handler = &priv->hdl; 995 if (priv->hdl.error) 996 return priv->hdl.error; 997 998 v4l2_ctrl_auto_cluster(2, &priv->autogain, 0, true); 999 v4l2_ctrl_auto_cluster(3, &priv->autowb, 0, true); 1000 v4l2_ctrl_auto_cluster(2, &priv->autoexposure, 1001 V4L2_EXPOSURE_MANUAL, true); 1002 1003 priv->rect.left = DEF_HSTRT << 1; 1004 priv->rect.top = DEF_VSTRT << 1; 1005 priv->rect.width = W_CIF; 1006 priv->rect.height = H_CIF; 1007 priv->half_scale = false; 1008 priv->code = MEDIA_BUS_FMT_YUYV8_2X8; 1009 priv->colorspace = V4L2_COLORSPACE_JPEG; 1010 1011 priv->subdev.internal_ops = &ov6650_internal_ops; 1012 priv->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 1013 1014 ret = v4l2_async_register_subdev(&priv->subdev); 1015 if (ret) 1016 v4l2_ctrl_handler_free(&priv->hdl); 1017 1018 return ret; 1019 } 1020 1021 static int ov6650_remove(struct i2c_client *client) 1022 { 1023 struct ov6650 *priv = to_ov6650(client); 1024 1025 v4l2_clk_put(priv->clk); 1026 v4l2_async_unregister_subdev(&priv->subdev); 1027 v4l2_ctrl_handler_free(&priv->hdl); 1028 return 0; 1029 } 1030 1031 static const struct i2c_device_id ov6650_id[] = { 1032 { "ov6650", 0 }, 1033 { } 1034 }; 1035 MODULE_DEVICE_TABLE(i2c, ov6650_id); 1036 1037 static struct i2c_driver ov6650_i2c_driver = { 1038 .driver = { 1039 .name = "ov6650", 1040 }, 1041 .probe = ov6650_probe, 1042 .remove = ov6650_remove, 1043 .id_table = ov6650_id, 1044 }; 1045 1046 module_i2c_driver(ov6650_i2c_driver); 1047 1048 MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV6650"); 1049 MODULE_AUTHOR("Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>"); 1050 MODULE_LICENSE("GPL v2"); 1051