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 initialy 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_parm */ 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 case V4L2_SEL_TGT_CROP_DEFAULT: 453 sel->r.left = DEF_HSTRT << 1; 454 sel->r.top = DEF_VSTRT << 1; 455 sel->r.width = W_CIF; 456 sel->r.height = H_CIF; 457 return 0; 458 case V4L2_SEL_TGT_CROP: 459 sel->r = priv->rect; 460 return 0; 461 default: 462 return -EINVAL; 463 } 464 } 465 466 static int ov6650_set_selection(struct v4l2_subdev *sd, 467 struct v4l2_subdev_pad_config *cfg, 468 struct v4l2_subdev_selection *sel) 469 { 470 struct i2c_client *client = v4l2_get_subdevdata(sd); 471 struct ov6650 *priv = to_ov6650(client); 472 struct v4l2_rect rect = sel->r; 473 int ret; 474 475 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE || 476 sel->target != V4L2_SEL_TGT_CROP) 477 return -EINVAL; 478 479 v4l_bound_align_image(&rect.width, 2, W_CIF, 1, 480 &rect.height, 2, H_CIF, 1, 0); 481 v4l_bound_align_image(&rect.left, DEF_HSTRT << 1, 482 (DEF_HSTRT << 1) + W_CIF - (__s32)rect.width, 1, 483 &rect.top, DEF_VSTRT << 1, 484 (DEF_VSTRT << 1) + H_CIF - (__s32)rect.height, 1, 485 0); 486 487 ret = ov6650_reg_write(client, REG_HSTRT, rect.left >> 1); 488 if (!ret) { 489 priv->rect.left = rect.left; 490 ret = ov6650_reg_write(client, REG_HSTOP, 491 (rect.left + rect.width) >> 1); 492 } 493 if (!ret) { 494 priv->rect.width = rect.width; 495 ret = ov6650_reg_write(client, REG_VSTRT, rect.top >> 1); 496 } 497 if (!ret) { 498 priv->rect.top = rect.top; 499 ret = ov6650_reg_write(client, REG_VSTOP, 500 (rect.top + rect.height) >> 1); 501 } 502 if (!ret) 503 priv->rect.height = rect.height; 504 505 return ret; 506 } 507 508 static int ov6650_get_fmt(struct v4l2_subdev *sd, 509 struct v4l2_subdev_pad_config *cfg, 510 struct v4l2_subdev_format *format) 511 { 512 struct v4l2_mbus_framefmt *mf = &format->format; 513 struct i2c_client *client = v4l2_get_subdevdata(sd); 514 struct ov6650 *priv = to_ov6650(client); 515 516 if (format->pad) 517 return -EINVAL; 518 519 mf->width = priv->rect.width >> priv->half_scale; 520 mf->height = priv->rect.height >> priv->half_scale; 521 mf->code = priv->code; 522 mf->colorspace = priv->colorspace; 523 mf->field = V4L2_FIELD_NONE; 524 525 return 0; 526 } 527 528 static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect) 529 { 530 return width > rect->width >> 1 || height > rect->height >> 1; 531 } 532 533 static u8 to_clkrc(struct v4l2_fract *timeperframe, 534 unsigned long pclk_limit, unsigned long pclk_max) 535 { 536 unsigned long pclk; 537 538 if (timeperframe->numerator && timeperframe->denominator) 539 pclk = pclk_max * timeperframe->denominator / 540 (FRAME_RATE_MAX * timeperframe->numerator); 541 else 542 pclk = pclk_max; 543 544 if (pclk_limit && pclk_limit < pclk) 545 pclk = pclk_limit; 546 547 return (pclk_max - 1) / pclk; 548 } 549 550 /* set the format we will capture in */ 551 static int ov6650_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf) 552 { 553 struct i2c_client *client = v4l2_get_subdevdata(sd); 554 struct ov6650 *priv = to_ov6650(client); 555 bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect); 556 struct v4l2_subdev_selection sel = { 557 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 558 .target = V4L2_SEL_TGT_CROP, 559 .r.left = priv->rect.left + (priv->rect.width >> 1) - 560 (mf->width >> (1 - half_scale)), 561 .r.top = priv->rect.top + (priv->rect.height >> 1) - 562 (mf->height >> (1 - half_scale)), 563 .r.width = mf->width << half_scale, 564 .r.height = mf->height << half_scale, 565 }; 566 u32 code = mf->code; 567 unsigned long mclk, pclk; 568 u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask, clkrc; 569 int ret; 570 571 /* select color matrix configuration for given color encoding */ 572 switch (code) { 573 case MEDIA_BUS_FMT_Y8_1X8: 574 dev_dbg(&client->dev, "pixel format GREY8_1X8\n"); 575 coma_mask |= COMA_RGB | COMA_WORD_SWAP | COMA_BYTE_SWAP; 576 coma_set |= COMA_BW; 577 break; 578 case MEDIA_BUS_FMT_YUYV8_2X8: 579 dev_dbg(&client->dev, "pixel format YUYV8_2X8_LE\n"); 580 coma_mask |= COMA_RGB | COMA_BW | COMA_BYTE_SWAP; 581 coma_set |= COMA_WORD_SWAP; 582 break; 583 case MEDIA_BUS_FMT_YVYU8_2X8: 584 dev_dbg(&client->dev, "pixel format YVYU8_2X8_LE (untested)\n"); 585 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP | 586 COMA_BYTE_SWAP; 587 break; 588 case MEDIA_BUS_FMT_UYVY8_2X8: 589 dev_dbg(&client->dev, "pixel format YUYV8_2X8_BE\n"); 590 if (half_scale) { 591 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP; 592 coma_set |= COMA_BYTE_SWAP; 593 } else { 594 coma_mask |= COMA_RGB | COMA_BW; 595 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP; 596 } 597 break; 598 case MEDIA_BUS_FMT_VYUY8_2X8: 599 dev_dbg(&client->dev, "pixel format YVYU8_2X8_BE (untested)\n"); 600 if (half_scale) { 601 coma_mask |= COMA_RGB | COMA_BW; 602 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP; 603 } else { 604 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP; 605 coma_set |= COMA_BYTE_SWAP; 606 } 607 break; 608 case MEDIA_BUS_FMT_SBGGR8_1X8: 609 dev_dbg(&client->dev, "pixel format SBGGR8_1X8 (untested)\n"); 610 coma_mask |= COMA_BW | COMA_BYTE_SWAP | COMA_WORD_SWAP; 611 coma_set |= COMA_RAW_RGB | COMA_RGB; 612 break; 613 default: 614 dev_err(&client->dev, "Pixel format not handled: 0x%x\n", code); 615 return -EINVAL; 616 } 617 priv->code = code; 618 619 if (code == MEDIA_BUS_FMT_Y8_1X8 || 620 code == MEDIA_BUS_FMT_SBGGR8_1X8) { 621 coml_mask = COML_ONE_CHANNEL; 622 coml_set = 0; 623 priv->pclk_max = 4000000; 624 } else { 625 coml_mask = 0; 626 coml_set = COML_ONE_CHANNEL; 627 priv->pclk_max = 8000000; 628 } 629 630 if (code == MEDIA_BUS_FMT_SBGGR8_1X8) 631 priv->colorspace = V4L2_COLORSPACE_SRGB; 632 else if (code != 0) 633 priv->colorspace = V4L2_COLORSPACE_JPEG; 634 635 if (half_scale) { 636 dev_dbg(&client->dev, "max resolution: QCIF\n"); 637 coma_set |= COMA_QCIF; 638 priv->pclk_max /= 2; 639 } else { 640 dev_dbg(&client->dev, "max resolution: CIF\n"); 641 coma_mask |= COMA_QCIF; 642 } 643 priv->half_scale = half_scale; 644 645 clkrc = CLKRC_12MHz; 646 mclk = 12000000; 647 priv->pclk_limit = 1334000; 648 dev_dbg(&client->dev, "using 12MHz input clock\n"); 649 650 clkrc |= to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max); 651 652 pclk = priv->pclk_max / GET_CLKRC_DIV(clkrc); 653 dev_dbg(&client->dev, "pixel clock divider: %ld.%ld\n", 654 mclk / pclk, 10 * mclk % pclk / pclk); 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 ret = ov6650_reg_write(client, REG_CLKRC, clkrc); 661 if (!ret) 662 ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask); 663 664 if (!ret) { 665 mf->colorspace = priv->colorspace; 666 mf->width = priv->rect.width >> half_scale; 667 mf->height = priv->rect.height >> half_scale; 668 } 669 return ret; 670 } 671 672 static int ov6650_set_fmt(struct v4l2_subdev *sd, 673 struct v4l2_subdev_pad_config *cfg, 674 struct v4l2_subdev_format *format) 675 { 676 struct v4l2_mbus_framefmt *mf = &format->format; 677 struct i2c_client *client = v4l2_get_subdevdata(sd); 678 struct ov6650 *priv = to_ov6650(client); 679 680 if (format->pad) 681 return -EINVAL; 682 683 if (is_unscaled_ok(mf->width, mf->height, &priv->rect)) 684 v4l_bound_align_image(&mf->width, 2, W_CIF, 1, 685 &mf->height, 2, H_CIF, 1, 0); 686 687 mf->field = V4L2_FIELD_NONE; 688 689 switch (mf->code) { 690 case MEDIA_BUS_FMT_Y10_1X10: 691 mf->code = MEDIA_BUS_FMT_Y8_1X8; 692 /* fall through */ 693 case MEDIA_BUS_FMT_Y8_1X8: 694 case MEDIA_BUS_FMT_YVYU8_2X8: 695 case MEDIA_BUS_FMT_YUYV8_2X8: 696 case MEDIA_BUS_FMT_VYUY8_2X8: 697 case MEDIA_BUS_FMT_UYVY8_2X8: 698 mf->colorspace = V4L2_COLORSPACE_JPEG; 699 break; 700 default: 701 mf->code = MEDIA_BUS_FMT_SBGGR8_1X8; 702 /* fall through */ 703 case MEDIA_BUS_FMT_SBGGR8_1X8: 704 mf->colorspace = V4L2_COLORSPACE_SRGB; 705 break; 706 } 707 708 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) 709 return ov6650_s_fmt(sd, mf); 710 cfg->try_fmt = *mf; 711 712 return 0; 713 } 714 715 static int ov6650_enum_mbus_code(struct v4l2_subdev *sd, 716 struct v4l2_subdev_pad_config *cfg, 717 struct v4l2_subdev_mbus_code_enum *code) 718 { 719 if (code->pad || code->index >= ARRAY_SIZE(ov6650_codes)) 720 return -EINVAL; 721 722 code->code = ov6650_codes[code->index]; 723 return 0; 724 } 725 726 static int ov6650_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms) 727 { 728 struct i2c_client *client = v4l2_get_subdevdata(sd); 729 struct ov6650 *priv = to_ov6650(client); 730 struct v4l2_captureparm *cp = &parms->parm.capture; 731 732 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 733 return -EINVAL; 734 735 memset(cp, 0, sizeof(*cp)); 736 cp->capability = V4L2_CAP_TIMEPERFRAME; 737 cp->timeperframe.numerator = GET_CLKRC_DIV(to_clkrc(&priv->tpf, 738 priv->pclk_limit, priv->pclk_max)); 739 cp->timeperframe.denominator = FRAME_RATE_MAX; 740 741 dev_dbg(&client->dev, "Frame interval: %u/%u s\n", 742 cp->timeperframe.numerator, cp->timeperframe.denominator); 743 744 return 0; 745 } 746 747 static int ov6650_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms) 748 { 749 struct i2c_client *client = v4l2_get_subdevdata(sd); 750 struct ov6650 *priv = to_ov6650(client); 751 struct v4l2_captureparm *cp = &parms->parm.capture; 752 struct v4l2_fract *tpf = &cp->timeperframe; 753 int div, ret; 754 u8 clkrc; 755 756 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 757 return -EINVAL; 758 759 if (cp->extendedmode != 0) 760 return -EINVAL; 761 762 if (tpf->numerator == 0 || tpf->denominator == 0) 763 div = 1; /* Reset to full rate */ 764 else 765 div = (tpf->numerator * FRAME_RATE_MAX) / tpf->denominator; 766 767 if (div == 0) 768 div = 1; 769 else if (div > GET_CLKRC_DIV(CLKRC_DIV_MASK)) 770 div = GET_CLKRC_DIV(CLKRC_DIV_MASK); 771 772 /* 773 * Keep result to be used as tpf limit 774 * for subseqent clock divider calculations 775 */ 776 priv->tpf.numerator = div; 777 priv->tpf.denominator = FRAME_RATE_MAX; 778 779 clkrc = to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max); 780 781 ret = ov6650_reg_rmw(client, REG_CLKRC, clkrc, CLKRC_DIV_MASK); 782 if (!ret) { 783 tpf->numerator = GET_CLKRC_DIV(clkrc); 784 tpf->denominator = FRAME_RATE_MAX; 785 } 786 787 return ret; 788 } 789 790 /* Soft reset the camera. This has nothing to do with the RESET pin! */ 791 static int ov6650_reset(struct i2c_client *client) 792 { 793 int ret; 794 795 dev_dbg(&client->dev, "reset\n"); 796 797 ret = ov6650_reg_rmw(client, REG_COMA, COMA_RESET, 0); 798 if (ret) 799 dev_err(&client->dev, 800 "An error occurred while entering soft reset!\n"); 801 802 return ret; 803 } 804 805 /* program default register values */ 806 static int ov6650_prog_dflt(struct i2c_client *client) 807 { 808 int ret; 809 810 dev_dbg(&client->dev, "initializing\n"); 811 812 ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */ 813 if (!ret) 814 ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_BAND_FILTER); 815 816 return ret; 817 } 818 819 static int ov6650_video_probe(struct i2c_client *client) 820 { 821 struct ov6650 *priv = to_ov6650(client); 822 u8 pidh, pidl, midh, midl; 823 int ret; 824 825 ret = ov6650_s_power(&priv->subdev, 1); 826 if (ret < 0) 827 return ret; 828 829 /* 830 * check and show product ID and manufacturer ID 831 */ 832 ret = ov6650_reg_read(client, REG_PIDH, &pidh); 833 if (!ret) 834 ret = ov6650_reg_read(client, REG_PIDL, &pidl); 835 if (!ret) 836 ret = ov6650_reg_read(client, REG_MIDH, &midh); 837 if (!ret) 838 ret = ov6650_reg_read(client, REG_MIDL, &midl); 839 840 if (ret) 841 goto done; 842 843 if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) { 844 dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n", 845 pidh, pidl); 846 ret = -ENODEV; 847 goto done; 848 } 849 850 dev_info(&client->dev, 851 "ov6650 Product ID 0x%02x:0x%02x Manufacturer ID 0x%02x:0x%02x\n", 852 pidh, pidl, midh, midl); 853 854 ret = ov6650_reset(client); 855 if (!ret) 856 ret = ov6650_prog_dflt(client); 857 if (!ret) 858 ret = v4l2_ctrl_handler_setup(&priv->hdl); 859 860 done: 861 ov6650_s_power(&priv->subdev, 0); 862 return ret; 863 } 864 865 static const struct v4l2_ctrl_ops ov6550_ctrl_ops = { 866 .g_volatile_ctrl = ov6550_g_volatile_ctrl, 867 .s_ctrl = ov6550_s_ctrl, 868 }; 869 870 static const struct v4l2_subdev_core_ops ov6650_core_ops = { 871 #ifdef CONFIG_VIDEO_ADV_DEBUG 872 .g_register = ov6650_get_register, 873 .s_register = ov6650_set_register, 874 #endif 875 .s_power = ov6650_s_power, 876 }; 877 878 /* Request bus settings on camera side */ 879 static int ov6650_g_mbus_config(struct v4l2_subdev *sd, 880 struct v4l2_mbus_config *cfg) 881 { 882 883 cfg->flags = V4L2_MBUS_MASTER | 884 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING | 885 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW | 886 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW | 887 V4L2_MBUS_DATA_ACTIVE_HIGH; 888 cfg->type = V4L2_MBUS_PARALLEL; 889 890 return 0; 891 } 892 893 /* Alter bus settings on camera side */ 894 static int ov6650_s_mbus_config(struct v4l2_subdev *sd, 895 const struct v4l2_mbus_config *cfg) 896 { 897 struct i2c_client *client = v4l2_get_subdevdata(sd); 898 int ret; 899 900 if (cfg->flags & V4L2_MBUS_PCLK_SAMPLE_RISING) 901 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_PCLK_RISING, 0); 902 else 903 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_PCLK_RISING); 904 if (ret) 905 return ret; 906 907 if (cfg->flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) 908 ret = ov6650_reg_rmw(client, REG_COMF, COMF_HREF_LOW, 0); 909 else 910 ret = ov6650_reg_rmw(client, REG_COMF, 0, COMF_HREF_LOW); 911 if (ret) 912 return ret; 913 914 if (cfg->flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) 915 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_VSYNC_HIGH, 0); 916 else 917 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_VSYNC_HIGH); 918 919 return ret; 920 } 921 922 static const struct v4l2_subdev_video_ops ov6650_video_ops = { 923 .s_stream = ov6650_s_stream, 924 .g_parm = ov6650_g_parm, 925 .s_parm = ov6650_s_parm, 926 .g_mbus_config = ov6650_g_mbus_config, 927 .s_mbus_config = ov6650_s_mbus_config, 928 }; 929 930 static const struct v4l2_subdev_pad_ops ov6650_pad_ops = { 931 .enum_mbus_code = ov6650_enum_mbus_code, 932 .get_selection = ov6650_get_selection, 933 .set_selection = ov6650_set_selection, 934 .get_fmt = ov6650_get_fmt, 935 .set_fmt = ov6650_set_fmt, 936 }; 937 938 static const struct v4l2_subdev_ops ov6650_subdev_ops = { 939 .core = &ov6650_core_ops, 940 .video = &ov6650_video_ops, 941 .pad = &ov6650_pad_ops, 942 }; 943 944 /* 945 * i2c_driver function 946 */ 947 static int ov6650_probe(struct i2c_client *client, 948 const struct i2c_device_id *did) 949 { 950 struct ov6650 *priv; 951 int ret; 952 953 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL); 954 if (!priv) { 955 dev_err(&client->dev, 956 "Failed to allocate memory for private data!\n"); 957 return -ENOMEM; 958 } 959 960 v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops); 961 v4l2_ctrl_handler_init(&priv->hdl, 13); 962 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 963 V4L2_CID_VFLIP, 0, 1, 1, 0); 964 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 965 V4L2_CID_HFLIP, 0, 1, 1, 0); 966 priv->autogain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 967 V4L2_CID_AUTOGAIN, 0, 1, 1, 1); 968 priv->gain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 969 V4L2_CID_GAIN, 0, 0x3f, 1, DEF_GAIN); 970 priv->autowb = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 971 V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1); 972 priv->blue = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 973 V4L2_CID_BLUE_BALANCE, 0, 0xff, 1, DEF_BLUE); 974 priv->red = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 975 V4L2_CID_RED_BALANCE, 0, 0xff, 1, DEF_RED); 976 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 977 V4L2_CID_SATURATION, 0, 0xf, 1, 0x8); 978 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 979 V4L2_CID_HUE, 0, HUE_MASK, 1, DEF_HUE); 980 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 981 V4L2_CID_BRIGHTNESS, 0, 0xff, 1, 0x80); 982 priv->autoexposure = v4l2_ctrl_new_std_menu(&priv->hdl, 983 &ov6550_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 984 V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO); 985 priv->exposure = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 986 V4L2_CID_EXPOSURE, 0, 0xff, 1, DEF_AECH); 987 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, 988 V4L2_CID_GAMMA, 0, 0xff, 1, 0x12); 989 990 priv->subdev.ctrl_handler = &priv->hdl; 991 if (priv->hdl.error) 992 return priv->hdl.error; 993 994 v4l2_ctrl_auto_cluster(2, &priv->autogain, 0, true); 995 v4l2_ctrl_auto_cluster(3, &priv->autowb, 0, true); 996 v4l2_ctrl_auto_cluster(2, &priv->autoexposure, 997 V4L2_EXPOSURE_MANUAL, true); 998 999 priv->rect.left = DEF_HSTRT << 1; 1000 priv->rect.top = DEF_VSTRT << 1; 1001 priv->rect.width = W_CIF; 1002 priv->rect.height = H_CIF; 1003 priv->half_scale = false; 1004 priv->code = MEDIA_BUS_FMT_YUYV8_2X8; 1005 priv->colorspace = V4L2_COLORSPACE_JPEG; 1006 1007 priv->clk = v4l2_clk_get(&client->dev, NULL); 1008 if (IS_ERR(priv->clk)) { 1009 ret = PTR_ERR(priv->clk); 1010 goto eclkget; 1011 } 1012 1013 ret = ov6650_video_probe(client); 1014 if (ret) { 1015 v4l2_clk_put(priv->clk); 1016 eclkget: 1017 v4l2_ctrl_handler_free(&priv->hdl); 1018 } 1019 1020 return ret; 1021 } 1022 1023 static int ov6650_remove(struct i2c_client *client) 1024 { 1025 struct ov6650 *priv = to_ov6650(client); 1026 1027 v4l2_clk_put(priv->clk); 1028 v4l2_device_unregister_subdev(&priv->subdev); 1029 v4l2_ctrl_handler_free(&priv->hdl); 1030 return 0; 1031 } 1032 1033 static const struct i2c_device_id ov6650_id[] = { 1034 { "ov6650", 0 }, 1035 { } 1036 }; 1037 MODULE_DEVICE_TABLE(i2c, ov6650_id); 1038 1039 static struct i2c_driver ov6650_i2c_driver = { 1040 .driver = { 1041 .name = "ov6650", 1042 }, 1043 .probe = ov6650_probe, 1044 .remove = ov6650_remove, 1045 .id_table = ov6650_id, 1046 }; 1047 1048 module_i2c_driver(ov6650_i2c_driver); 1049 1050 MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV6650"); 1051 MODULE_AUTHOR("Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>"); 1052 MODULE_LICENSE("GPL v2"); 1053