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/clk.h> 26 #include <linux/delay.h> 27 #include <linux/i2c.h> 28 #include <linux/slab.h> 29 #include <linux/v4l2-mediabus.h> 30 #include <linux/module.h> 31 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 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 = clk_prepare_enable(priv->clk); 463 else 464 clk_disable_unprepare(priv->clk); 465 466 return ret; 467 } 468 469 static int ov6650_get_selection(struct v4l2_subdev *sd, 470 struct v4l2_subdev_state *sd_state, 471 struct v4l2_subdev_selection *sel) 472 { 473 struct i2c_client *client = v4l2_get_subdevdata(sd); 474 struct ov6650 *priv = to_ov6650(client); 475 struct v4l2_rect *rect; 476 477 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { 478 /* pre-select try crop rectangle */ 479 rect = &sd_state->pads->try_crop; 480 481 } else { 482 /* pre-select active crop rectangle */ 483 rect = &priv->rect; 484 } 485 486 switch (sel->target) { 487 case V4L2_SEL_TGT_CROP_BOUNDS: 488 sel->r.left = DEF_HSTRT << 1; 489 sel->r.top = DEF_VSTRT << 1; 490 sel->r.width = W_CIF; 491 sel->r.height = H_CIF; 492 return 0; 493 494 case V4L2_SEL_TGT_CROP: 495 /* use selected crop rectangle */ 496 sel->r = *rect; 497 return 0; 498 499 default: 500 return -EINVAL; 501 } 502 } 503 504 static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect) 505 { 506 return width > rect->width >> 1 || height > rect->height >> 1; 507 } 508 509 static void ov6650_bind_align_crop_rectangle(struct v4l2_rect *rect) 510 { 511 v4l_bound_align_image(&rect->width, 2, W_CIF, 1, 512 &rect->height, 2, H_CIF, 1, 0); 513 v4l_bound_align_image(&rect->left, DEF_HSTRT << 1, 514 (DEF_HSTRT << 1) + W_CIF - (__s32)rect->width, 1, 515 &rect->top, DEF_VSTRT << 1, 516 (DEF_VSTRT << 1) + H_CIF - (__s32)rect->height, 517 1, 0); 518 } 519 520 static int ov6650_set_selection(struct v4l2_subdev *sd, 521 struct v4l2_subdev_state *sd_state, 522 struct v4l2_subdev_selection *sel) 523 { 524 struct i2c_client *client = v4l2_get_subdevdata(sd); 525 struct ov6650 *priv = to_ov6650(client); 526 int ret; 527 528 if (sel->target != V4L2_SEL_TGT_CROP) 529 return -EINVAL; 530 531 ov6650_bind_align_crop_rectangle(&sel->r); 532 533 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { 534 struct v4l2_rect *crop = &sd_state->pads->try_crop; 535 struct v4l2_mbus_framefmt *mf = &sd_state->pads->try_fmt; 536 /* detect current pad config scaling factor */ 537 bool half_scale = !is_unscaled_ok(mf->width, mf->height, crop); 538 539 /* store new crop rectangle */ 540 *crop = sel->r; 541 542 /* adjust frame size */ 543 mf->width = crop->width >> half_scale; 544 mf->height = crop->height >> half_scale; 545 546 return 0; 547 } 548 549 /* V4L2_SUBDEV_FORMAT_ACTIVE */ 550 551 /* apply new crop rectangle */ 552 ret = ov6650_reg_write(client, REG_HSTRT, sel->r.left >> 1); 553 if (!ret) { 554 priv->rect.width += priv->rect.left - sel->r.left; 555 priv->rect.left = sel->r.left; 556 ret = ov6650_reg_write(client, REG_HSTOP, 557 (sel->r.left + sel->r.width) >> 1); 558 } 559 if (!ret) { 560 priv->rect.width = sel->r.width; 561 ret = ov6650_reg_write(client, REG_VSTRT, sel->r.top >> 1); 562 } 563 if (!ret) { 564 priv->rect.height += priv->rect.top - sel->r.top; 565 priv->rect.top = sel->r.top; 566 ret = ov6650_reg_write(client, REG_VSTOP, 567 (sel->r.top + sel->r.height) >> 1); 568 } 569 if (!ret) 570 priv->rect.height = sel->r.height; 571 572 return ret; 573 } 574 575 static int ov6650_get_fmt(struct v4l2_subdev *sd, 576 struct v4l2_subdev_state *sd_state, 577 struct v4l2_subdev_format *format) 578 { 579 struct v4l2_mbus_framefmt *mf = &format->format; 580 struct i2c_client *client = v4l2_get_subdevdata(sd); 581 struct ov6650 *priv = to_ov6650(client); 582 583 if (format->pad) 584 return -EINVAL; 585 586 /* initialize response with default media bus frame format */ 587 *mf = ov6650_def_fmt; 588 589 /* update media bus format code and frame size */ 590 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 591 mf->width = sd_state->pads->try_fmt.width; 592 mf->height = sd_state->pads->try_fmt.height; 593 mf->code = sd_state->pads->try_fmt.code; 594 595 } else { 596 mf->width = priv->rect.width >> priv->half_scale; 597 mf->height = priv->rect.height >> priv->half_scale; 598 mf->code = priv->code; 599 } 600 return 0; 601 } 602 603 #define to_clkrc(div) ((div) - 1) 604 605 /* set the format we will capture in */ 606 static int ov6650_s_fmt(struct v4l2_subdev *sd, u32 code, bool half_scale) 607 { 608 struct i2c_client *client = v4l2_get_subdevdata(sd); 609 struct ov6650 *priv = to_ov6650(client); 610 u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask; 611 int ret; 612 613 /* select color matrix configuration for given color encoding */ 614 switch (code) { 615 case MEDIA_BUS_FMT_Y8_1X8: 616 dev_dbg(&client->dev, "pixel format GREY8_1X8\n"); 617 coma_mask |= COMA_RGB | COMA_WORD_SWAP | COMA_BYTE_SWAP; 618 coma_set |= COMA_BW; 619 break; 620 case MEDIA_BUS_FMT_YUYV8_2X8: 621 dev_dbg(&client->dev, "pixel format YUYV8_2X8_LE\n"); 622 coma_mask |= COMA_RGB | COMA_BW | COMA_BYTE_SWAP; 623 coma_set |= COMA_WORD_SWAP; 624 break; 625 case MEDIA_BUS_FMT_YVYU8_2X8: 626 dev_dbg(&client->dev, "pixel format YVYU8_2X8_LE (untested)\n"); 627 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP | 628 COMA_BYTE_SWAP; 629 break; 630 case MEDIA_BUS_FMT_UYVY8_2X8: 631 dev_dbg(&client->dev, "pixel format YUYV8_2X8_BE\n"); 632 if (half_scale) { 633 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP; 634 coma_set |= COMA_BYTE_SWAP; 635 } else { 636 coma_mask |= COMA_RGB | COMA_BW; 637 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP; 638 } 639 break; 640 case MEDIA_BUS_FMT_VYUY8_2X8: 641 dev_dbg(&client->dev, "pixel format YVYU8_2X8_BE (untested)\n"); 642 if (half_scale) { 643 coma_mask |= COMA_RGB | COMA_BW; 644 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP; 645 } else { 646 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP; 647 coma_set |= COMA_BYTE_SWAP; 648 } 649 break; 650 case MEDIA_BUS_FMT_SBGGR8_1X8: 651 dev_dbg(&client->dev, "pixel format SBGGR8_1X8 (untested)\n"); 652 coma_mask |= COMA_BW | COMA_BYTE_SWAP | COMA_WORD_SWAP; 653 coma_set |= COMA_RAW_RGB | COMA_RGB; 654 break; 655 default: 656 dev_err(&client->dev, "Pixel format not handled: 0x%x\n", code); 657 return -EINVAL; 658 } 659 660 if (code == MEDIA_BUS_FMT_Y8_1X8 || 661 code == MEDIA_BUS_FMT_SBGGR8_1X8) { 662 coml_mask = COML_ONE_CHANNEL; 663 coml_set = 0; 664 } else { 665 coml_mask = 0; 666 coml_set = COML_ONE_CHANNEL; 667 } 668 669 if (half_scale) { 670 dev_dbg(&client->dev, "max resolution: QCIF\n"); 671 coma_set |= COMA_QCIF; 672 } else { 673 dev_dbg(&client->dev, "max resolution: CIF\n"); 674 coma_mask |= COMA_QCIF; 675 } 676 677 ret = ov6650_reg_rmw(client, REG_COMA, coma_set, coma_mask); 678 if (!ret) { 679 priv->half_scale = half_scale; 680 681 ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask); 682 } 683 if (!ret) 684 priv->code = code; 685 686 return ret; 687 } 688 689 static int ov6650_set_fmt(struct v4l2_subdev *sd, 690 struct v4l2_subdev_state *sd_state, 691 struct v4l2_subdev_format *format) 692 { 693 struct v4l2_mbus_framefmt *mf = &format->format; 694 struct i2c_client *client = v4l2_get_subdevdata(sd); 695 struct ov6650 *priv = to_ov6650(client); 696 struct v4l2_rect *crop; 697 bool half_scale; 698 699 if (format->pad) 700 return -EINVAL; 701 702 switch (mf->code) { 703 case MEDIA_BUS_FMT_Y10_1X10: 704 mf->code = MEDIA_BUS_FMT_Y8_1X8; 705 fallthrough; 706 case MEDIA_BUS_FMT_Y8_1X8: 707 case MEDIA_BUS_FMT_YVYU8_2X8: 708 case MEDIA_BUS_FMT_YUYV8_2X8: 709 case MEDIA_BUS_FMT_VYUY8_2X8: 710 case MEDIA_BUS_FMT_UYVY8_2X8: 711 break; 712 default: 713 mf->code = MEDIA_BUS_FMT_SBGGR8_1X8; 714 fallthrough; 715 case MEDIA_BUS_FMT_SBGGR8_1X8: 716 break; 717 } 718 719 if (format->which == V4L2_SUBDEV_FORMAT_TRY) 720 crop = &sd_state->pads->try_crop; 721 else 722 crop = &priv->rect; 723 724 half_scale = !is_unscaled_ok(mf->width, mf->height, crop); 725 726 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 727 /* store new mbus frame format code and size in pad config */ 728 sd_state->pads->try_fmt.width = crop->width >> half_scale; 729 sd_state->pads->try_fmt.height = crop->height >> half_scale; 730 sd_state->pads->try_fmt.code = mf->code; 731 732 /* return default mbus frame format updated with pad config */ 733 *mf = ov6650_def_fmt; 734 mf->width = sd_state->pads->try_fmt.width; 735 mf->height = sd_state->pads->try_fmt.height; 736 mf->code = sd_state->pads->try_fmt.code; 737 738 } else { 739 int ret = 0; 740 741 /* apply new media bus frame format and scaling if changed */ 742 if (mf->code != priv->code || half_scale != priv->half_scale) 743 ret = ov6650_s_fmt(sd, mf->code, half_scale); 744 if (ret) 745 return ret; 746 747 /* return default format updated with active size and code */ 748 *mf = ov6650_def_fmt; 749 mf->width = priv->rect.width >> priv->half_scale; 750 mf->height = priv->rect.height >> priv->half_scale; 751 mf->code = priv->code; 752 } 753 return 0; 754 } 755 756 static int ov6650_enum_mbus_code(struct v4l2_subdev *sd, 757 struct v4l2_subdev_state *sd_state, 758 struct v4l2_subdev_mbus_code_enum *code) 759 { 760 if (code->pad || code->index >= ARRAY_SIZE(ov6650_codes)) 761 return -EINVAL; 762 763 code->code = ov6650_codes[code->index]; 764 return 0; 765 } 766 767 static int ov6650_enum_frame_interval(struct v4l2_subdev *sd, 768 struct v4l2_subdev_state *sd_state, 769 struct v4l2_subdev_frame_interval_enum *fie) 770 { 771 int i; 772 773 /* enumerate supported frame intervals not exceeding 1 second */ 774 if (fie->index > CLKRC_DIV_MASK || 775 GET_CLKRC_DIV(fie->index) > FRAME_RATE_MAX) 776 return -EINVAL; 777 778 for (i = 0; i < ARRAY_SIZE(ov6650_codes); i++) 779 if (fie->code == ov6650_codes[i]) 780 break; 781 if (i == ARRAY_SIZE(ov6650_codes)) 782 return -EINVAL; 783 784 if (!fie->width || fie->width > W_CIF || 785 !fie->height || fie->height > H_CIF) 786 return -EINVAL; 787 788 fie->interval.numerator = GET_CLKRC_DIV(fie->index); 789 fie->interval.denominator = FRAME_RATE_MAX; 790 791 return 0; 792 } 793 794 static int ov6650_g_frame_interval(struct v4l2_subdev *sd, 795 struct v4l2_subdev_frame_interval *ival) 796 { 797 struct i2c_client *client = v4l2_get_subdevdata(sd); 798 struct ov6650 *priv = to_ov6650(client); 799 800 ival->interval = priv->tpf; 801 802 dev_dbg(&client->dev, "Frame interval: %u/%u s\n", 803 ival->interval.numerator, ival->interval.denominator); 804 805 return 0; 806 } 807 808 static int ov6650_s_frame_interval(struct v4l2_subdev *sd, 809 struct v4l2_subdev_frame_interval *ival) 810 { 811 struct i2c_client *client = v4l2_get_subdevdata(sd); 812 struct ov6650 *priv = to_ov6650(client); 813 struct v4l2_fract *tpf = &ival->interval; 814 int div, ret; 815 816 if (tpf->numerator == 0 || tpf->denominator == 0) 817 div = 1; /* Reset to full rate */ 818 else 819 div = (tpf->numerator * FRAME_RATE_MAX) / tpf->denominator; 820 821 if (div == 0) 822 div = 1; 823 else if (div > GET_CLKRC_DIV(CLKRC_DIV_MASK)) 824 div = GET_CLKRC_DIV(CLKRC_DIV_MASK); 825 826 ret = ov6650_reg_rmw(client, REG_CLKRC, to_clkrc(div), CLKRC_DIV_MASK); 827 if (!ret) { 828 priv->tpf.numerator = div; 829 priv->tpf.denominator = FRAME_RATE_MAX; 830 831 *tpf = priv->tpf; 832 } 833 834 return ret; 835 } 836 837 /* Soft reset the camera. This has nothing to do with the RESET pin! */ 838 static int ov6650_reset(struct i2c_client *client) 839 { 840 int ret; 841 842 dev_dbg(&client->dev, "reset\n"); 843 844 ret = ov6650_reg_rmw(client, REG_COMA, COMA_RESET, 0); 845 if (ret) 846 dev_err(&client->dev, 847 "An error occurred while entering soft reset!\n"); 848 849 return ret; 850 } 851 852 /* program default register values */ 853 static int ov6650_prog_dflt(struct i2c_client *client, u8 clkrc) 854 { 855 int ret; 856 857 dev_dbg(&client->dev, "initializing\n"); 858 859 ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */ 860 if (!ret) 861 ret = ov6650_reg_write(client, REG_CLKRC, clkrc); 862 if (!ret) 863 ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_BAND_FILTER); 864 865 return ret; 866 } 867 868 static int ov6650_video_probe(struct v4l2_subdev *sd) 869 { 870 struct i2c_client *client = v4l2_get_subdevdata(sd); 871 struct ov6650 *priv = to_ov6650(client); 872 const struct ov6650_xclk *xclk = NULL; 873 unsigned long rate; 874 u8 pidh, pidl, midh, midl; 875 int i, ret = 0; 876 877 priv->clk = devm_clk_get(&client->dev, NULL); 878 if (IS_ERR(priv->clk)) { 879 ret = PTR_ERR(priv->clk); 880 dev_err(&client->dev, "clk request err: %d\n", ret); 881 return ret; 882 } 883 884 rate = clk_get_rate(priv->clk); 885 for (i = 0; rate && i < ARRAY_SIZE(ov6650_xclk); i++) { 886 if (rate != ov6650_xclk[i].rate) 887 continue; 888 889 xclk = &ov6650_xclk[i]; 890 dev_info(&client->dev, "using host default clock rate %lukHz\n", 891 rate / 1000); 892 break; 893 } 894 for (i = 0; !xclk && i < ARRAY_SIZE(ov6650_xclk); i++) { 895 ret = clk_set_rate(priv->clk, ov6650_xclk[i].rate); 896 if (ret || clk_get_rate(priv->clk) != ov6650_xclk[i].rate) 897 continue; 898 899 xclk = &ov6650_xclk[i]; 900 dev_info(&client->dev, "using negotiated clock rate %lukHz\n", 901 xclk->rate / 1000); 902 break; 903 } 904 if (!xclk) { 905 dev_err(&client->dev, "unable to get supported clock rate\n"); 906 if (!ret) 907 ret = -EINVAL; 908 return ret; 909 } 910 911 ret = ov6650_s_power(sd, 1); 912 if (ret < 0) 913 return ret; 914 915 msleep(20); 916 917 /* 918 * check and show product ID and manufacturer ID 919 */ 920 ret = ov6650_reg_read(client, REG_PIDH, &pidh); 921 if (!ret) 922 ret = ov6650_reg_read(client, REG_PIDL, &pidl); 923 if (!ret) 924 ret = ov6650_reg_read(client, REG_MIDH, &midh); 925 if (!ret) 926 ret = ov6650_reg_read(client, REG_MIDL, &midl); 927 928 if (ret) 929 goto done; 930 931 if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) { 932 dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n", 933 pidh, pidl); 934 ret = -ENODEV; 935 goto done; 936 } 937 938 dev_info(&client->dev, 939 "ov6650 Product ID 0x%02x:0x%02x Manufacturer ID 0x%02x:0x%02x\n", 940 pidh, pidl, midh, midl); 941 942 ret = ov6650_reset(client); 943 if (!ret) 944 ret = ov6650_prog_dflt(client, xclk->clkrc); 945 if (!ret) { 946 /* driver default frame format, no scaling */ 947 ret = ov6650_s_fmt(sd, ov6650_def_fmt.code, false); 948 } 949 if (!ret) 950 ret = v4l2_ctrl_handler_setup(&priv->hdl); 951 952 done: 953 ov6650_s_power(sd, 0); 954 return ret; 955 } 956 957 static const struct v4l2_ctrl_ops ov6550_ctrl_ops = { 958 .g_volatile_ctrl = ov6550_g_volatile_ctrl, 959 .s_ctrl = ov6550_s_ctrl, 960 }; 961 962 static const struct v4l2_subdev_core_ops ov6650_core_ops = { 963 #ifdef CONFIG_VIDEO_ADV_DEBUG 964 .g_register = ov6650_get_register, 965 .s_register = ov6650_set_register, 966 #endif 967 .s_power = ov6650_s_power, 968 }; 969 970 /* Request bus settings on camera side */ 971 static int ov6650_get_mbus_config(struct v4l2_subdev *sd, 972 unsigned int pad, 973 struct v4l2_mbus_config *cfg) 974 { 975 struct i2c_client *client = v4l2_get_subdevdata(sd); 976 u8 comj, comf; 977 int ret; 978 979 ret = ov6650_reg_read(client, REG_COMJ, &comj); 980 if (ret) 981 return ret; 982 983 ret = ov6650_reg_read(client, REG_COMF, &comf); 984 if (ret) 985 return ret; 986 987 cfg->type = V4L2_MBUS_PARALLEL; 988 989 cfg->bus.parallel.flags = V4L2_MBUS_MASTER | V4L2_MBUS_DATA_ACTIVE_HIGH 990 | ((comj & COMJ_VSYNC_HIGH) ? V4L2_MBUS_VSYNC_ACTIVE_HIGH 991 : V4L2_MBUS_VSYNC_ACTIVE_LOW) 992 | ((comf & COMF_HREF_LOW) ? V4L2_MBUS_HSYNC_ACTIVE_LOW 993 : V4L2_MBUS_HSYNC_ACTIVE_HIGH) 994 | ((comj & COMJ_PCLK_RISING) ? V4L2_MBUS_PCLK_SAMPLE_RISING 995 : V4L2_MBUS_PCLK_SAMPLE_FALLING); 996 return 0; 997 } 998 999 static const struct v4l2_subdev_video_ops ov6650_video_ops = { 1000 .s_stream = ov6650_s_stream, 1001 .g_frame_interval = ov6650_g_frame_interval, 1002 .s_frame_interval = ov6650_s_frame_interval, 1003 }; 1004 1005 static const struct v4l2_subdev_pad_ops ov6650_pad_ops = { 1006 .enum_mbus_code = ov6650_enum_mbus_code, 1007 .enum_frame_interval = ov6650_enum_frame_interval, 1008 .get_selection = ov6650_get_selection, 1009 .set_selection = ov6650_set_selection, 1010 .get_fmt = ov6650_get_fmt, 1011 .set_fmt = ov6650_set_fmt, 1012 .get_mbus_config = ov6650_get_mbus_config, 1013 }; 1014 1015 static const struct v4l2_subdev_ops ov6650_subdev_ops = { 1016 .core = &ov6650_core_ops, 1017 .video = &ov6650_video_ops, 1018 .pad = &ov6650_pad_ops, 1019 }; 1020 1021 static const struct v4l2_subdev_internal_ops ov6650_internal_ops = { 1022 .registered = ov6650_video_probe, 1023 }; 1024 1025 /* 1026 * i2c_driver function 1027 */ 1028 static int ov6650_probe(struct i2c_client *client) 1029 { 1030 struct ov6650 *priv; 1031 int ret; 1032 1033 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL); 1034 if (!priv) 1035 return -ENOMEM; 1036 1037 v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops); 1038 v4l2_ctrl_handler_init(&priv->hdl, 13); 1039 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1040 V4L2_CID_VFLIP, 0, 1, 1, 0); 1041 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1042 V4L2_CID_HFLIP, 0, 1, 1, 0); 1043 priv->autogain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1044 V4L2_CID_AUTOGAIN, 0, 1, 1, 1); 1045 priv->gain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1046 V4L2_CID_GAIN, 0, 0x3f, 1, DEF_GAIN); 1047 priv->autowb = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1048 V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1); 1049 priv->blue = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1050 V4L2_CID_BLUE_BALANCE, 0, 0xff, 1, DEF_BLUE); 1051 priv->red = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1052 V4L2_CID_RED_BALANCE, 0, 0xff, 1, DEF_RED); 1053 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1054 V4L2_CID_SATURATION, 0, 0xf, 1, 0x8); 1055 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1056 V4L2_CID_HUE, 0, HUE_MASK, 1, DEF_HUE); 1057 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1058 V4L2_CID_BRIGHTNESS, 0, 0xff, 1, 0x80); 1059 priv->autoexposure = v4l2_ctrl_new_std_menu(&priv->hdl, 1060 &ov6550_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1061 V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO); 1062 priv->exposure = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1063 V4L2_CID_EXPOSURE, 0, 0xff, 1, DEF_AECH); 1064 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 1065 V4L2_CID_GAMMA, 0, 0xff, 1, 0x12); 1066 1067 priv->subdev.ctrl_handler = &priv->hdl; 1068 if (priv->hdl.error) { 1069 ret = priv->hdl.error; 1070 goto ectlhdlfree; 1071 } 1072 1073 v4l2_ctrl_auto_cluster(2, &priv->autogain, 0, true); 1074 v4l2_ctrl_auto_cluster(3, &priv->autowb, 0, true); 1075 v4l2_ctrl_auto_cluster(2, &priv->autoexposure, 1076 V4L2_EXPOSURE_MANUAL, true); 1077 1078 priv->rect.left = DEF_HSTRT << 1; 1079 priv->rect.top = DEF_VSTRT << 1; 1080 priv->rect.width = W_CIF; 1081 priv->rect.height = H_CIF; 1082 1083 /* Hardware default frame interval */ 1084 priv->tpf.numerator = GET_CLKRC_DIV(DEF_CLKRC); 1085 priv->tpf.denominator = FRAME_RATE_MAX; 1086 1087 priv->subdev.internal_ops = &ov6650_internal_ops; 1088 1089 ret = v4l2_async_register_subdev(&priv->subdev); 1090 if (!ret) 1091 return 0; 1092 ectlhdlfree: 1093 v4l2_ctrl_handler_free(&priv->hdl); 1094 1095 return ret; 1096 } 1097 1098 static void ov6650_remove(struct i2c_client *client) 1099 { 1100 struct ov6650 *priv = to_ov6650(client); 1101 1102 v4l2_async_unregister_subdev(&priv->subdev); 1103 v4l2_ctrl_handler_free(&priv->hdl); 1104 } 1105 1106 static const struct i2c_device_id ov6650_id[] = { 1107 { "ov6650", 0 }, 1108 { } 1109 }; 1110 MODULE_DEVICE_TABLE(i2c, ov6650_id); 1111 1112 static struct i2c_driver ov6650_i2c_driver = { 1113 .driver = { 1114 .name = "ov6650", 1115 }, 1116 .probe_new = ov6650_probe, 1117 .remove = ov6650_remove, 1118 .id_table = ov6650_id, 1119 }; 1120 1121 module_i2c_driver(ov6650_i2c_driver); 1122 1123 MODULE_DESCRIPTION("V4L2 subdevice driver for OmniVision OV6650 camera sensor"); 1124 MODULE_AUTHOR("Janusz Krzysztofik <jmkrzyszt@gmail.com"); 1125 MODULE_LICENSE("GPL v2"); 1126