1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * V4L2 subdevice driver for OmniVision OV6650 Camera Sensor 4 * 5 * Copyright (C) 2010 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> 6 * 7 * Based on OmniVision OV96xx Camera Driver 8 * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com> 9 * 10 * Based on ov772x camera driver: 11 * Copyright (C) 2008 Renesas Solutions Corp. 12 * Kuninori Morimoto <morimoto.kuninori@renesas.com> 13 * 14 * Based on ov7670 and soc_camera_platform driver, 15 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net> 16 * Copyright (C) 2008 Magnus Damm 17 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> 18 * 19 * Hardware specific bits initially based on former work by Matt Callow 20 * drivers/media/video/omap/sensor_ov6650.c 21 * Copyright (C) 2006 Matt Callow 22 */ 23 24 #include <linux/bitops.h> 25 #include <linux/delay.h> 26 #include <linux/i2c.h> 27 #include <linux/slab.h> 28 #include <linux/v4l2-mediabus.h> 29 #include <linux/module.h> 30 31 #include <media/v4l2-clk.h> 32 #include <media/v4l2-ctrls.h> 33 #include <media/v4l2-device.h> 34 35 /* Register definitions */ 36 #define REG_GAIN 0x00 /* range 00 - 3F */ 37 #define REG_BLUE 0x01 38 #define REG_RED 0x02 39 #define REG_SAT 0x03 /* [7:4] saturation [0:3] reserved */ 40 #define REG_HUE 0x04 /* [7:6] rsrvd [5] hue en [4:0] hue */ 41 42 #define REG_BRT 0x06 43 44 #define REG_PIDH 0x0a 45 #define REG_PIDL 0x0b 46 47 #define REG_AECH 0x10 48 #define REG_CLKRC 0x11 /* Data Format and Internal Clock */ 49 /* [7:6] Input system clock (MHz)*/ 50 /* 00=8, 01=12, 10=16, 11=24 */ 51 /* [5:0]: Internal Clock Pre-Scaler */ 52 #define REG_COMA 0x12 /* [7] Reset */ 53 #define REG_COMB 0x13 54 #define REG_COMC 0x14 55 #define REG_COMD 0x15 56 #define REG_COML 0x16 57 #define REG_HSTRT 0x17 58 #define REG_HSTOP 0x18 59 #define REG_VSTRT 0x19 60 #define REG_VSTOP 0x1a 61 #define REG_PSHFT 0x1b 62 #define REG_MIDH 0x1c 63 #define REG_MIDL 0x1d 64 #define REG_HSYNS 0x1e 65 #define REG_HSYNE 0x1f 66 #define REG_COME 0x20 67 #define REG_YOFF 0x21 68 #define REG_UOFF 0x22 69 #define REG_VOFF 0x23 70 #define REG_AEW 0x24 71 #define REG_AEB 0x25 72 #define REG_COMF 0x26 73 #define REG_COMG 0x27 74 #define REG_COMH 0x28 75 #define REG_COMI 0x29 76 77 #define REG_FRARL 0x2b 78 #define REG_COMJ 0x2c 79 #define REG_COMK 0x2d 80 #define REG_AVGY 0x2e 81 #define REG_REF0 0x2f 82 #define REG_REF1 0x30 83 #define REG_REF2 0x31 84 #define REG_FRAJH 0x32 85 #define REG_FRAJL 0x33 86 #define REG_FACT 0x34 87 #define REG_L1AEC 0x35 88 #define REG_AVGU 0x36 89 #define REG_AVGV 0x37 90 91 #define REG_SPCB 0x60 92 #define REG_SPCC 0x61 93 #define REG_GAM1 0x62 94 #define REG_GAM2 0x63 95 #define REG_GAM3 0x64 96 #define REG_SPCD 0x65 97 98 #define REG_SPCE 0x68 99 #define REG_ADCL 0x69 100 101 #define REG_RMCO 0x6c 102 #define REG_GMCO 0x6d 103 #define REG_BMCO 0x6e 104 105 106 /* Register bits, values, etc. */ 107 #define OV6650_PIDH 0x66 /* high byte of product ID number */ 108 #define OV6650_PIDL 0x50 /* low byte of product ID number */ 109 #define OV6650_MIDH 0x7F /* high byte of mfg ID */ 110 #define OV6650_MIDL 0xA2 /* low byte of mfg ID */ 111 112 #define DEF_GAIN 0x00 113 #define DEF_BLUE 0x80 114 #define DEF_RED 0x80 115 116 #define SAT_SHIFT 4 117 #define SAT_MASK (0xf << SAT_SHIFT) 118 #define SET_SAT(x) (((x) << SAT_SHIFT) & SAT_MASK) 119 120 #define HUE_EN BIT(5) 121 #define HUE_MASK 0x1f 122 #define DEF_HUE 0x10 123 #define SET_HUE(x) (HUE_EN | ((x) & HUE_MASK)) 124 125 #define DEF_AECH 0x4D 126 127 #define CLKRC_8MHz 0x00 128 #define CLKRC_12MHz 0x40 129 #define CLKRC_16MHz 0x80 130 #define CLKRC_24MHz 0xc0 131 #define CLKRC_DIV_MASK 0x3f 132 #define GET_CLKRC_DIV(x) (((x) & CLKRC_DIV_MASK) + 1) 133 #define DEF_CLKRC 0x00 134 135 #define COMA_RESET BIT(7) 136 #define COMA_QCIF BIT(5) 137 #define COMA_RAW_RGB BIT(4) 138 #define COMA_RGB BIT(3) 139 #define COMA_BW BIT(2) 140 #define COMA_WORD_SWAP BIT(1) 141 #define COMA_BYTE_SWAP BIT(0) 142 #define DEF_COMA 0x00 143 144 #define COMB_FLIP_V BIT(7) 145 #define COMB_FLIP_H BIT(5) 146 #define COMB_BAND_FILTER BIT(4) 147 #define COMB_AWB BIT(2) 148 #define COMB_AGC BIT(1) 149 #define COMB_AEC BIT(0) 150 #define DEF_COMB 0x5f 151 152 #define COML_ONE_CHANNEL BIT(7) 153 154 #define DEF_HSTRT 0x24 155 #define DEF_HSTOP 0xd4 156 #define DEF_VSTRT 0x04 157 #define DEF_VSTOP 0x94 158 159 #define COMF_HREF_LOW BIT(4) 160 161 #define COMJ_PCLK_RISING BIT(4) 162 #define COMJ_VSYNC_HIGH BIT(0) 163 164 /* supported resolutions */ 165 #define W_QCIF (DEF_HSTOP - DEF_HSTRT) 166 #define W_CIF (W_QCIF << 1) 167 #define H_QCIF (DEF_VSTOP - DEF_VSTRT) 168 #define H_CIF (H_QCIF << 1) 169 170 #define FRAME_RATE_MAX 30 171 172 173 struct ov6650_reg { 174 u8 reg; 175 u8 val; 176 }; 177 178 struct ov6650 { 179 struct v4l2_subdev subdev; 180 struct v4l2_ctrl_handler hdl; 181 struct { 182 /* exposure/autoexposure cluster */ 183 struct v4l2_ctrl *autoexposure; 184 struct v4l2_ctrl *exposure; 185 }; 186 struct { 187 /* gain/autogain cluster */ 188 struct v4l2_ctrl *autogain; 189 struct v4l2_ctrl *gain; 190 }; 191 struct { 192 /* blue/red/autowhitebalance cluster */ 193 struct v4l2_ctrl *autowb; 194 struct v4l2_ctrl *blue; 195 struct v4l2_ctrl *red; 196 }; 197 struct v4l2_clk *clk; 198 bool half_scale; /* scale down output by 2 */ 199 struct v4l2_rect rect; /* sensor cropping window */ 200 struct v4l2_fract tpf; /* as requested with s_frame_interval */ 201 u32 code; 202 }; 203 204 struct ov6650_xclk { 205 unsigned long rate; 206 u8 clkrc; 207 }; 208 209 static const struct ov6650_xclk ov6650_xclk[] = { 210 { 211 .rate = 8000000, 212 .clkrc = CLKRC_8MHz, 213 }, 214 { 215 .rate = 12000000, 216 .clkrc = CLKRC_12MHz, 217 }, 218 { 219 .rate = 16000000, 220 .clkrc = CLKRC_16MHz, 221 }, 222 { 223 .rate = 24000000, 224 .clkrc = CLKRC_24MHz, 225 }, 226 }; 227 228 static u32 ov6650_codes[] = { 229 MEDIA_BUS_FMT_YUYV8_2X8, 230 MEDIA_BUS_FMT_UYVY8_2X8, 231 MEDIA_BUS_FMT_YVYU8_2X8, 232 MEDIA_BUS_FMT_VYUY8_2X8, 233 MEDIA_BUS_FMT_SBGGR8_1X8, 234 MEDIA_BUS_FMT_Y8_1X8, 235 }; 236 237 static const struct v4l2_mbus_framefmt ov6650_def_fmt = { 238 .width = W_CIF, 239 .height = H_CIF, 240 .code = MEDIA_BUS_FMT_SBGGR8_1X8, 241 .colorspace = V4L2_COLORSPACE_SRGB, 242 .field = V4L2_FIELD_NONE, 243 .ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT, 244 .quantization = V4L2_QUANTIZATION_DEFAULT, 245 .xfer_func = V4L2_XFER_FUNC_DEFAULT, 246 }; 247 248 /* read a register */ 249 static int ov6650_reg_read(struct i2c_client *client, u8 reg, u8 *val) 250 { 251 int ret; 252 u8 data = reg; 253 struct i2c_msg msg = { 254 .addr = client->addr, 255 .flags = 0, 256 .len = 1, 257 .buf = &data, 258 }; 259 260 ret = i2c_transfer(client->adapter, &msg, 1); 261 if (ret < 0) 262 goto err; 263 264 msg.flags = I2C_M_RD; 265 ret = i2c_transfer(client->adapter, &msg, 1); 266 if (ret < 0) 267 goto err; 268 269 *val = data; 270 return 0; 271 272 err: 273 dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg); 274 return ret; 275 } 276 277 /* write a register */ 278 static int ov6650_reg_write(struct i2c_client *client, u8 reg, u8 val) 279 { 280 int ret; 281 unsigned char data[2] = { reg, val }; 282 struct i2c_msg msg = { 283 .addr = client->addr, 284 .flags = 0, 285 .len = 2, 286 .buf = data, 287 }; 288 289 ret = i2c_transfer(client->adapter, &msg, 1); 290 udelay(100); 291 292 if (ret < 0) { 293 dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg); 294 return ret; 295 } 296 return 0; 297 } 298 299 300 /* Read a register, alter its bits, write it back */ 301 static int ov6650_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 mask) 302 { 303 u8 val; 304 int ret; 305 306 ret = ov6650_reg_read(client, reg, &val); 307 if (ret) { 308 dev_err(&client->dev, 309 "[Read]-Modify-Write of register 0x%02x failed!\n", 310 reg); 311 return ret; 312 } 313 314 val &= ~mask; 315 val |= set; 316 317 ret = ov6650_reg_write(client, reg, val); 318 if (ret) 319 dev_err(&client->dev, 320 "Read-Modify-[Write] of register 0x%02x failed!\n", 321 reg); 322 323 return ret; 324 } 325 326 static struct ov6650 *to_ov6650(const struct i2c_client *client) 327 { 328 return container_of(i2c_get_clientdata(client), struct ov6650, subdev); 329 } 330 331 /* Start/Stop streaming from the device */ 332 static int ov6650_s_stream(struct v4l2_subdev *sd, int enable) 333 { 334 return 0; 335 } 336 337 /* Get status of additional camera capabilities */ 338 static int ov6550_g_volatile_ctrl(struct v4l2_ctrl *ctrl) 339 { 340 struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl); 341 struct v4l2_subdev *sd = &priv->subdev; 342 struct i2c_client *client = v4l2_get_subdevdata(sd); 343 uint8_t reg, reg2; 344 int ret; 345 346 switch (ctrl->id) { 347 case V4L2_CID_AUTOGAIN: 348 ret = ov6650_reg_read(client, REG_GAIN, ®); 349 if (!ret) 350 priv->gain->val = reg; 351 return ret; 352 case V4L2_CID_AUTO_WHITE_BALANCE: 353 ret = ov6650_reg_read(client, REG_BLUE, ®); 354 if (!ret) 355 ret = ov6650_reg_read(client, REG_RED, ®2); 356 if (!ret) { 357 priv->blue->val = reg; 358 priv->red->val = reg2; 359 } 360 return ret; 361 case V4L2_CID_EXPOSURE_AUTO: 362 ret = ov6650_reg_read(client, REG_AECH, ®); 363 if (!ret) 364 priv->exposure->val = reg; 365 return ret; 366 } 367 return -EINVAL; 368 } 369 370 /* Set status of additional camera capabilities */ 371 static int ov6550_s_ctrl(struct v4l2_ctrl *ctrl) 372 { 373 struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl); 374 struct v4l2_subdev *sd = &priv->subdev; 375 struct i2c_client *client = v4l2_get_subdevdata(sd); 376 int ret; 377 378 switch (ctrl->id) { 379 case V4L2_CID_AUTOGAIN: 380 ret = ov6650_reg_rmw(client, REG_COMB, 381 ctrl->val ? COMB_AGC : 0, COMB_AGC); 382 if (!ret && !ctrl->val) 383 ret = ov6650_reg_write(client, REG_GAIN, priv->gain->val); 384 return ret; 385 case V4L2_CID_AUTO_WHITE_BALANCE: 386 ret = ov6650_reg_rmw(client, REG_COMB, 387 ctrl->val ? COMB_AWB : 0, COMB_AWB); 388 if (!ret && !ctrl->val) { 389 ret = ov6650_reg_write(client, REG_BLUE, priv->blue->val); 390 if (!ret) 391 ret = ov6650_reg_write(client, REG_RED, 392 priv->red->val); 393 } 394 return ret; 395 case V4L2_CID_SATURATION: 396 return ov6650_reg_rmw(client, REG_SAT, SET_SAT(ctrl->val), 397 SAT_MASK); 398 case V4L2_CID_HUE: 399 return ov6650_reg_rmw(client, REG_HUE, SET_HUE(ctrl->val), 400 HUE_MASK); 401 case V4L2_CID_BRIGHTNESS: 402 return ov6650_reg_write(client, REG_BRT, ctrl->val); 403 case V4L2_CID_EXPOSURE_AUTO: 404 ret = ov6650_reg_rmw(client, REG_COMB, ctrl->val == 405 V4L2_EXPOSURE_AUTO ? COMB_AEC : 0, COMB_AEC); 406 if (!ret && ctrl->val == V4L2_EXPOSURE_MANUAL) 407 ret = ov6650_reg_write(client, REG_AECH, 408 priv->exposure->val); 409 return ret; 410 case V4L2_CID_GAMMA: 411 return ov6650_reg_write(client, REG_GAM1, ctrl->val); 412 case V4L2_CID_VFLIP: 413 return ov6650_reg_rmw(client, REG_COMB, 414 ctrl->val ? COMB_FLIP_V : 0, COMB_FLIP_V); 415 case V4L2_CID_HFLIP: 416 return ov6650_reg_rmw(client, REG_COMB, 417 ctrl->val ? COMB_FLIP_H : 0, COMB_FLIP_H); 418 } 419 420 return -EINVAL; 421 } 422 423 #ifdef CONFIG_VIDEO_ADV_DEBUG 424 static int ov6650_get_register(struct v4l2_subdev *sd, 425 struct v4l2_dbg_register *reg) 426 { 427 struct i2c_client *client = v4l2_get_subdevdata(sd); 428 int ret; 429 u8 val; 430 431 if (reg->reg & ~0xff) 432 return -EINVAL; 433 434 reg->size = 1; 435 436 ret = ov6650_reg_read(client, reg->reg, &val); 437 if (!ret) 438 reg->val = (__u64)val; 439 440 return ret; 441 } 442 443 static int ov6650_set_register(struct v4l2_subdev *sd, 444 const struct v4l2_dbg_register *reg) 445 { 446 struct i2c_client *client = v4l2_get_subdevdata(sd); 447 448 if (reg->reg & ~0xff || reg->val & ~0xff) 449 return -EINVAL; 450 451 return ov6650_reg_write(client, reg->reg, reg->val); 452 } 453 #endif 454 455 static int ov6650_s_power(struct v4l2_subdev *sd, int on) 456 { 457 struct i2c_client *client = v4l2_get_subdevdata(sd); 458 struct ov6650 *priv = to_ov6650(client); 459 int ret = 0; 460 461 if (on) 462 ret = v4l2_clk_enable(priv->clk); 463 else 464 v4l2_clk_disable(priv->clk); 465 466 return ret; 467 } 468 469 static int ov6650_get_selection(struct v4l2_subdev *sd, 470 struct v4l2_subdev_pad_config *cfg, 471 struct v4l2_subdev_selection *sel) 472 { 473 struct i2c_client *client = v4l2_get_subdevdata(sd); 474 struct ov6650 *priv = to_ov6650(client); 475 476 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) 477 return -EINVAL; 478 479 switch (sel->target) { 480 case V4L2_SEL_TGT_CROP_BOUNDS: 481 sel->r.left = DEF_HSTRT << 1; 482 sel->r.top = DEF_VSTRT << 1; 483 sel->r.width = W_CIF; 484 sel->r.height = H_CIF; 485 return 0; 486 case V4L2_SEL_TGT_CROP: 487 sel->r = priv->rect; 488 return 0; 489 default: 490 return -EINVAL; 491 } 492 } 493 494 static int ov6650_set_selection(struct v4l2_subdev *sd, 495 struct v4l2_subdev_pad_config *cfg, 496 struct v4l2_subdev_selection *sel) 497 { 498 struct i2c_client *client = v4l2_get_subdevdata(sd); 499 struct ov6650 *priv = to_ov6650(client); 500 int ret; 501 502 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE || 503 sel->target != V4L2_SEL_TGT_CROP) 504 return -EINVAL; 505 506 v4l_bound_align_image(&sel->r.width, 2, W_CIF, 1, 507 &sel->r.height, 2, H_CIF, 1, 0); 508 v4l_bound_align_image(&sel->r.left, DEF_HSTRT << 1, 509 (DEF_HSTRT << 1) + W_CIF - (__s32)sel->r.width, 1, 510 &sel->r.top, DEF_VSTRT << 1, 511 (DEF_VSTRT << 1) + H_CIF - (__s32)sel->r.height, 512 1, 0); 513 514 ret = ov6650_reg_write(client, REG_HSTRT, sel->r.left >> 1); 515 if (!ret) { 516 priv->rect.width += priv->rect.left - sel->r.left; 517 priv->rect.left = sel->r.left; 518 ret = ov6650_reg_write(client, REG_HSTOP, 519 (sel->r.left + sel->r.width) >> 1); 520 } 521 if (!ret) { 522 priv->rect.width = sel->r.width; 523 ret = ov6650_reg_write(client, REG_VSTRT, sel->r.top >> 1); 524 } 525 if (!ret) { 526 priv->rect.height += priv->rect.top - sel->r.top; 527 priv->rect.top = sel->r.top; 528 ret = ov6650_reg_write(client, REG_VSTOP, 529 (sel->r.top + sel->r.height) >> 1); 530 } 531 if (!ret) 532 priv->rect.height = sel->r.height; 533 534 return ret; 535 } 536 537 static int ov6650_get_fmt(struct v4l2_subdev *sd, 538 struct v4l2_subdev_pad_config *cfg, 539 struct v4l2_subdev_format *format) 540 { 541 struct v4l2_mbus_framefmt *mf = &format->format; 542 struct i2c_client *client = v4l2_get_subdevdata(sd); 543 struct ov6650 *priv = to_ov6650(client); 544 545 if (format->pad) 546 return -EINVAL; 547 548 /* initialize response with default media bus frame format */ 549 *mf = ov6650_def_fmt; 550 551 /* update media bus format code and frame size */ 552 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 553 mf->width = cfg->try_fmt.width; 554 mf->height = cfg->try_fmt.height; 555 mf->code = cfg->try_fmt.code; 556 557 } else { 558 mf->width = priv->rect.width >> priv->half_scale; 559 mf->height = priv->rect.height >> priv->half_scale; 560 mf->code = priv->code; 561 } 562 return 0; 563 } 564 565 static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect) 566 { 567 return width > rect->width >> 1 || height > rect->height >> 1; 568 } 569 570 #define to_clkrc(div) ((div) - 1) 571 572 /* set the format we will capture in */ 573 static int ov6650_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf) 574 { 575 struct i2c_client *client = v4l2_get_subdevdata(sd); 576 struct ov6650 *priv = to_ov6650(client); 577 bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect); 578 struct v4l2_subdev_selection sel = { 579 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 580 .target = V4L2_SEL_TGT_CROP, 581 .r.left = priv->rect.left + (priv->rect.width >> 1) - 582 (mf->width >> (1 - half_scale)), 583 .r.top = priv->rect.top + (priv->rect.height >> 1) - 584 (mf->height >> (1 - half_scale)), 585 .r.width = mf->width << half_scale, 586 .r.height = mf->height << half_scale, 587 }; 588 u32 code = mf->code; 589 u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask; 590 int ret; 591 592 /* select color matrix configuration for given color encoding */ 593 switch (code) { 594 case MEDIA_BUS_FMT_Y8_1X8: 595 dev_dbg(&client->dev, "pixel format GREY8_1X8\n"); 596 coma_mask |= COMA_RGB | COMA_WORD_SWAP | COMA_BYTE_SWAP; 597 coma_set |= COMA_BW; 598 break; 599 case MEDIA_BUS_FMT_YUYV8_2X8: 600 dev_dbg(&client->dev, "pixel format YUYV8_2X8_LE\n"); 601 coma_mask |= COMA_RGB | COMA_BW | COMA_BYTE_SWAP; 602 coma_set |= COMA_WORD_SWAP; 603 break; 604 case MEDIA_BUS_FMT_YVYU8_2X8: 605 dev_dbg(&client->dev, "pixel format YVYU8_2X8_LE (untested)\n"); 606 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP | 607 COMA_BYTE_SWAP; 608 break; 609 case MEDIA_BUS_FMT_UYVY8_2X8: 610 dev_dbg(&client->dev, "pixel format YUYV8_2X8_BE\n"); 611 if (half_scale) { 612 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP; 613 coma_set |= COMA_BYTE_SWAP; 614 } else { 615 coma_mask |= COMA_RGB | COMA_BW; 616 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP; 617 } 618 break; 619 case MEDIA_BUS_FMT_VYUY8_2X8: 620 dev_dbg(&client->dev, "pixel format YVYU8_2X8_BE (untested)\n"); 621 if (half_scale) { 622 coma_mask |= COMA_RGB | COMA_BW; 623 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP; 624 } else { 625 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP; 626 coma_set |= COMA_BYTE_SWAP; 627 } 628 break; 629 case MEDIA_BUS_FMT_SBGGR8_1X8: 630 dev_dbg(&client->dev, "pixel format SBGGR8_1X8 (untested)\n"); 631 coma_mask |= COMA_BW | COMA_BYTE_SWAP | COMA_WORD_SWAP; 632 coma_set |= COMA_RAW_RGB | COMA_RGB; 633 break; 634 default: 635 dev_err(&client->dev, "Pixel format not handled: 0x%x\n", code); 636 return -EINVAL; 637 } 638 639 if (code == MEDIA_BUS_FMT_Y8_1X8 || 640 code == MEDIA_BUS_FMT_SBGGR8_1X8) { 641 coml_mask = COML_ONE_CHANNEL; 642 coml_set = 0; 643 } else { 644 coml_mask = 0; 645 coml_set = COML_ONE_CHANNEL; 646 } 647 648 if (half_scale) { 649 dev_dbg(&client->dev, "max resolution: QCIF\n"); 650 coma_set |= COMA_QCIF; 651 } else { 652 dev_dbg(&client->dev, "max resolution: CIF\n"); 653 coma_mask |= COMA_QCIF; 654 } 655 656 ret = ov6650_set_selection(sd, NULL, &sel); 657 if (!ret) 658 ret = ov6650_reg_rmw(client, REG_COMA, coma_set, coma_mask); 659 if (!ret) { 660 priv->half_scale = half_scale; 661 662 ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask); 663 } 664 if (!ret) 665 priv->code = code; 666 667 return ret; 668 } 669 670 static int ov6650_set_fmt(struct v4l2_subdev *sd, 671 struct v4l2_subdev_pad_config *cfg, 672 struct v4l2_subdev_format *format) 673 { 674 struct v4l2_mbus_framefmt *mf = &format->format; 675 struct i2c_client *client = v4l2_get_subdevdata(sd); 676 struct ov6650 *priv = to_ov6650(client); 677 678 if (format->pad) 679 return -EINVAL; 680 681 if (is_unscaled_ok(mf->width, mf->height, &priv->rect)) 682 v4l_bound_align_image(&mf->width, 2, W_CIF, 1, 683 &mf->height, 2, H_CIF, 1, 0); 684 685 switch (mf->code) { 686 case MEDIA_BUS_FMT_Y10_1X10: 687 mf->code = MEDIA_BUS_FMT_Y8_1X8; 688 /* fall through */ 689 case MEDIA_BUS_FMT_Y8_1X8: 690 case MEDIA_BUS_FMT_YVYU8_2X8: 691 case MEDIA_BUS_FMT_YUYV8_2X8: 692 case MEDIA_BUS_FMT_VYUY8_2X8: 693 case MEDIA_BUS_FMT_UYVY8_2X8: 694 break; 695 default: 696 mf->code = MEDIA_BUS_FMT_SBGGR8_1X8; 697 /* fall through */ 698 case MEDIA_BUS_FMT_SBGGR8_1X8: 699 break; 700 } 701 702 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 703 /* store media bus format code and frame size in pad config */ 704 cfg->try_fmt.width = mf->width; 705 cfg->try_fmt.height = mf->height; 706 cfg->try_fmt.code = mf->code; 707 708 /* return default mbus frame format updated with pad config */ 709 *mf = ov6650_def_fmt; 710 mf->width = cfg->try_fmt.width; 711 mf->height = cfg->try_fmt.height; 712 mf->code = cfg->try_fmt.code; 713 714 } else { 715 /* apply new media bus format code and frame size */ 716 int ret = ov6650_s_fmt(sd, mf); 717 718 if (ret) 719 return ret; 720 721 /* return default format updated with active size and code */ 722 *mf = ov6650_def_fmt; 723 mf->width = priv->rect.width >> priv->half_scale; 724 mf->height = priv->rect.height >> priv->half_scale; 725 mf->code = priv->code; 726 } 727 return 0; 728 } 729 730 static int ov6650_enum_mbus_code(struct v4l2_subdev *sd, 731 struct v4l2_subdev_pad_config *cfg, 732 struct v4l2_subdev_mbus_code_enum *code) 733 { 734 if (code->pad || code->index >= ARRAY_SIZE(ov6650_codes)) 735 return -EINVAL; 736 737 code->code = ov6650_codes[code->index]; 738 return 0; 739 } 740 741 static int ov6650_g_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); 746 747 ival->interval = priv->tpf; 748 749 dev_dbg(&client->dev, "Frame interval: %u/%u s\n", 750 ival->interval.numerator, ival->interval.denominator); 751 752 return 0; 753 } 754 755 static int ov6650_s_frame_interval(struct v4l2_subdev *sd, 756 struct v4l2_subdev_frame_interval *ival) 757 { 758 struct i2c_client *client = v4l2_get_subdevdata(sd); 759 struct ov6650 *priv = to_ov6650(client); 760 struct v4l2_fract *tpf = &ival->interval; 761 int div, ret; 762 763 if (tpf->numerator == 0 || tpf->denominator == 0) 764 div = 1; /* Reset to full rate */ 765 else 766 div = (tpf->numerator * FRAME_RATE_MAX) / tpf->denominator; 767 768 if (div == 0) 769 div = 1; 770 else if (div > GET_CLKRC_DIV(CLKRC_DIV_MASK)) 771 div = GET_CLKRC_DIV(CLKRC_DIV_MASK); 772 773 ret = ov6650_reg_rmw(client, REG_CLKRC, to_clkrc(div), CLKRC_DIV_MASK); 774 if (!ret) { 775 priv->tpf.numerator = div; 776 priv->tpf.denominator = FRAME_RATE_MAX; 777 778 *tpf = priv->tpf; 779 } 780 781 return ret; 782 } 783 784 /* Soft reset the camera. This has nothing to do with the RESET pin! */ 785 static int ov6650_reset(struct i2c_client *client) 786 { 787 int ret; 788 789 dev_dbg(&client->dev, "reset\n"); 790 791 ret = ov6650_reg_rmw(client, REG_COMA, COMA_RESET, 0); 792 if (ret) 793 dev_err(&client->dev, 794 "An error occurred while entering soft reset!\n"); 795 796 return ret; 797 } 798 799 /* program default register values */ 800 static int ov6650_prog_dflt(struct i2c_client *client, u8 clkrc) 801 { 802 int ret; 803 804 dev_dbg(&client->dev, "initializing\n"); 805 806 ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */ 807 if (!ret) 808 ret = ov6650_reg_write(client, REG_CLKRC, clkrc); 809 if (!ret) 810 ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_BAND_FILTER); 811 812 return ret; 813 } 814 815 static int ov6650_video_probe(struct v4l2_subdev *sd) 816 { 817 struct i2c_client *client = v4l2_get_subdevdata(sd); 818 struct ov6650 *priv = to_ov6650(client); 819 const struct ov6650_xclk *xclk = NULL; 820 unsigned long rate; 821 u8 pidh, pidl, midh, midl; 822 int i, ret = 0; 823 824 priv->clk = v4l2_clk_get(&client->dev, NULL); 825 if (IS_ERR(priv->clk)) { 826 ret = PTR_ERR(priv->clk); 827 dev_err(&client->dev, "v4l2_clk request err: %d\n", ret); 828 return ret; 829 } 830 831 rate = v4l2_clk_get_rate(priv->clk); 832 for (i = 0; rate && i < ARRAY_SIZE(ov6650_xclk); i++) { 833 if (rate != ov6650_xclk[i].rate) 834 continue; 835 836 xclk = &ov6650_xclk[i]; 837 dev_info(&client->dev, "using host default clock rate %lukHz\n", 838 rate / 1000); 839 break; 840 } 841 for (i = 0; !xclk && i < ARRAY_SIZE(ov6650_xclk); i++) { 842 ret = v4l2_clk_set_rate(priv->clk, ov6650_xclk[i].rate); 843 if (ret || v4l2_clk_get_rate(priv->clk) != ov6650_xclk[i].rate) 844 continue; 845 846 xclk = &ov6650_xclk[i]; 847 dev_info(&client->dev, "using negotiated clock rate %lukHz\n", 848 xclk->rate / 1000); 849 break; 850 } 851 if (!xclk) { 852 dev_err(&client->dev, "unable to get supported clock rate\n"); 853 if (!ret) 854 ret = -EINVAL; 855 goto eclkput; 856 } 857 858 ret = ov6650_s_power(sd, 1); 859 if (ret < 0) 860 goto eclkput; 861 862 msleep(20); 863 864 /* 865 * check and show product ID and manufacturer ID 866 */ 867 ret = ov6650_reg_read(client, REG_PIDH, &pidh); 868 if (!ret) 869 ret = ov6650_reg_read(client, REG_PIDL, &pidl); 870 if (!ret) 871 ret = ov6650_reg_read(client, REG_MIDH, &midh); 872 if (!ret) 873 ret = ov6650_reg_read(client, REG_MIDL, &midl); 874 875 if (ret) 876 goto done; 877 878 if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) { 879 dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n", 880 pidh, pidl); 881 ret = -ENODEV; 882 goto done; 883 } 884 885 dev_info(&client->dev, 886 "ov6650 Product ID 0x%02x:0x%02x Manufacturer ID 0x%02x:0x%02x\n", 887 pidh, pidl, midh, midl); 888 889 ret = ov6650_reset(client); 890 if (!ret) 891 ret = ov6650_prog_dflt(client, xclk->clkrc); 892 if (!ret) { 893 struct v4l2_mbus_framefmt mf = ov6650_def_fmt; 894 895 ret = ov6650_s_fmt(sd, &mf); 896 } 897 if (!ret) 898 ret = v4l2_ctrl_handler_setup(&priv->hdl); 899 900 done: 901 ov6650_s_power(sd, 0); 902 if (!ret) 903 return 0; 904 eclkput: 905 v4l2_clk_put(priv->clk); 906 907 return ret; 908 } 909 910 static const struct v4l2_ctrl_ops ov6550_ctrl_ops = { 911 .g_volatile_ctrl = ov6550_g_volatile_ctrl, 912 .s_ctrl = ov6550_s_ctrl, 913 }; 914 915 static const struct v4l2_subdev_core_ops ov6650_core_ops = { 916 #ifdef CONFIG_VIDEO_ADV_DEBUG 917 .g_register = ov6650_get_register, 918 .s_register = ov6650_set_register, 919 #endif 920 .s_power = ov6650_s_power, 921 }; 922 923 /* Request bus settings on camera side */ 924 static int ov6650_get_mbus_config(struct v4l2_subdev *sd, 925 unsigned int pad, 926 struct v4l2_mbus_config *cfg) 927 { 928 struct i2c_client *client = v4l2_get_subdevdata(sd); 929 u8 comj, comf; 930 int ret; 931 932 ret = ov6650_reg_read(client, REG_COMJ, &comj); 933 if (ret) 934 return ret; 935 936 ret = ov6650_reg_read(client, REG_COMF, &comf); 937 if (ret) 938 return ret; 939 940 cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_DATA_ACTIVE_HIGH 941 | ((comj & COMJ_VSYNC_HIGH) ? V4L2_MBUS_VSYNC_ACTIVE_HIGH 942 : V4L2_MBUS_VSYNC_ACTIVE_LOW) 943 | ((comf & COMF_HREF_LOW) ? V4L2_MBUS_HSYNC_ACTIVE_LOW 944 : V4L2_MBUS_HSYNC_ACTIVE_HIGH) 945 | ((comj & COMJ_PCLK_RISING) ? V4L2_MBUS_PCLK_SAMPLE_RISING 946 : V4L2_MBUS_PCLK_SAMPLE_FALLING); 947 cfg->type = V4L2_MBUS_PARALLEL; 948 949 return 0; 950 } 951 952 /* Alter bus settings on camera side */ 953 static int ov6650_set_mbus_config(struct v4l2_subdev *sd, 954 unsigned int pad, 955 struct v4l2_mbus_config *cfg) 956 { 957 struct i2c_client *client = v4l2_get_subdevdata(sd); 958 int ret = 0; 959 960 if (cfg->flags & V4L2_MBUS_PCLK_SAMPLE_RISING) 961 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_PCLK_RISING, 0); 962 else if (cfg->flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) 963 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_PCLK_RISING); 964 if (ret) 965 return ret; 966 967 if (cfg->flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) 968 ret = ov6650_reg_rmw(client, REG_COMF, COMF_HREF_LOW, 0); 969 else if (cfg->flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) 970 ret = ov6650_reg_rmw(client, REG_COMF, 0, COMF_HREF_LOW); 971 if (ret) 972 return ret; 973 974 if (cfg->flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) 975 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_VSYNC_HIGH, 0); 976 else if (cfg->flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) 977 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_VSYNC_HIGH); 978 if (ret) 979 return ret; 980 981 /* 982 * Update the configuration to report what is actually applied to 983 * the hardware. 984 */ 985 return ov6650_get_mbus_config(sd, pad, cfg); 986 } 987 988 static const struct v4l2_subdev_video_ops ov6650_video_ops = { 989 .s_stream = ov6650_s_stream, 990 .g_frame_interval = ov6650_g_frame_interval, 991 .s_frame_interval = ov6650_s_frame_interval, 992 }; 993 994 static const struct v4l2_subdev_pad_ops ov6650_pad_ops = { 995 .enum_mbus_code = ov6650_enum_mbus_code, 996 .get_selection = ov6650_get_selection, 997 .set_selection = ov6650_set_selection, 998 .get_fmt = ov6650_get_fmt, 999 .set_fmt = ov6650_set_fmt, 1000 .get_mbus_config = ov6650_get_mbus_config, 1001 .set_mbus_config = ov6650_set_mbus_config, 1002 }; 1003 1004 static const struct v4l2_subdev_ops ov6650_subdev_ops = { 1005 .core = &ov6650_core_ops, 1006 .video = &ov6650_video_ops, 1007 .pad = &ov6650_pad_ops, 1008 }; 1009 1010 static const struct v4l2_subdev_internal_ops ov6650_internal_ops = { 1011 .registered = ov6650_video_probe, 1012 }; 1013 1014 /* 1015 * i2c_driver function 1016 */ 1017 static int ov6650_probe(struct i2c_client *client, 1018 const struct i2c_device_id *did) 1019 { 1020 struct ov6650 *priv; 1021 int ret; 1022 1023 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL); 1024 if (!priv) 1025 return -ENOMEM; 1026 1027 v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops); 1028 v4l2_ctrl_handler_init(&priv->hdl, 13); 1029 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1030 V4L2_CID_VFLIP, 0, 1, 1, 0); 1031 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1032 V4L2_CID_HFLIP, 0, 1, 1, 0); 1033 priv->autogain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1034 V4L2_CID_AUTOGAIN, 0, 1, 1, 1); 1035 priv->gain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1036 V4L2_CID_GAIN, 0, 0x3f, 1, DEF_GAIN); 1037 priv->autowb = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1038 V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1); 1039 priv->blue = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1040 V4L2_CID_BLUE_BALANCE, 0, 0xff, 1, DEF_BLUE); 1041 priv->red = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1042 V4L2_CID_RED_BALANCE, 0, 0xff, 1, DEF_RED); 1043 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1044 V4L2_CID_SATURATION, 0, 0xf, 1, 0x8); 1045 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1046 V4L2_CID_HUE, 0, HUE_MASK, 1, DEF_HUE); 1047 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1048 V4L2_CID_BRIGHTNESS, 0, 0xff, 1, 0x80); 1049 priv->autoexposure = v4l2_ctrl_new_std_menu(&priv->hdl, 1050 &ov6550_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1051 V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO); 1052 priv->exposure = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1053 V4L2_CID_EXPOSURE, 0, 0xff, 1, DEF_AECH); 1054 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1055 V4L2_CID_GAMMA, 0, 0xff, 1, 0x12); 1056 1057 priv->subdev.ctrl_handler = &priv->hdl; 1058 if (priv->hdl.error) { 1059 ret = priv->hdl.error; 1060 goto ectlhdlfree; 1061 } 1062 1063 v4l2_ctrl_auto_cluster(2, &priv->autogain, 0, true); 1064 v4l2_ctrl_auto_cluster(3, &priv->autowb, 0, true); 1065 v4l2_ctrl_auto_cluster(2, &priv->autoexposure, 1066 V4L2_EXPOSURE_MANUAL, true); 1067 1068 priv->rect.left = DEF_HSTRT << 1; 1069 priv->rect.top = DEF_VSTRT << 1; 1070 priv->rect.width = W_CIF; 1071 priv->rect.height = H_CIF; 1072 1073 /* Hardware default frame interval */ 1074 priv->tpf.numerator = GET_CLKRC_DIV(DEF_CLKRC); 1075 priv->tpf.denominator = FRAME_RATE_MAX; 1076 1077 priv->subdev.internal_ops = &ov6650_internal_ops; 1078 1079 ret = v4l2_async_register_subdev(&priv->subdev); 1080 if (!ret) 1081 return 0; 1082 ectlhdlfree: 1083 v4l2_ctrl_handler_free(&priv->hdl); 1084 1085 return ret; 1086 } 1087 1088 static int ov6650_remove(struct i2c_client *client) 1089 { 1090 struct ov6650 *priv = to_ov6650(client); 1091 1092 v4l2_clk_put(priv->clk); 1093 v4l2_async_unregister_subdev(&priv->subdev); 1094 v4l2_ctrl_handler_free(&priv->hdl); 1095 return 0; 1096 } 1097 1098 static const struct i2c_device_id ov6650_id[] = { 1099 { "ov6650", 0 }, 1100 { } 1101 }; 1102 MODULE_DEVICE_TABLE(i2c, ov6650_id); 1103 1104 static struct i2c_driver ov6650_i2c_driver = { 1105 .driver = { 1106 .name = "ov6650", 1107 }, 1108 .probe = ov6650_probe, 1109 .remove = ov6650_remove, 1110 .id_table = ov6650_id, 1111 }; 1112 1113 module_i2c_driver(ov6650_i2c_driver); 1114 1115 MODULE_DESCRIPTION("V4L2 subdevice driver for OmniVision OV6650 camera sensor"); 1116 MODULE_AUTHOR("Janusz Krzysztofik <jmkrzyszt@gmail.com"); 1117 MODULE_LICENSE("GPL v2"); 1118