1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Support for GalaxyCore GC2235 2M camera sensor. 4 * 5 * Copyright (c) 2014 Intel Corporation. All Rights Reserved. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License version 9 * 2 as published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 */ 17 18 #include <linux/module.h> 19 #include <linux/types.h> 20 #include <linux/kernel.h> 21 #include <linux/mm.h> 22 #include <linux/string.h> 23 #include <linux/errno.h> 24 #include <linux/init.h> 25 #include <linux/kmod.h> 26 #include <linux/device.h> 27 #include <linux/delay.h> 28 #include <linux/slab.h> 29 #include <linux/i2c.h> 30 #include <linux/moduleparam.h> 31 #include <media/v4l2-device.h> 32 #include "../include/linux/atomisp_gmin_platform.h" 33 #include <linux/acpi.h> 34 #include <linux/io.h> 35 36 #include "gc2235.h" 37 38 /* i2c read/write stuff */ 39 static int gc2235_read_reg(struct i2c_client *client, 40 u16 data_length, u16 reg, u16 *val) 41 { 42 int err; 43 struct i2c_msg msg[2]; 44 unsigned char data[6]; 45 46 if (!client->adapter) { 47 dev_err(&client->dev, "%s error, no client->adapter\n", 48 __func__); 49 return -ENODEV; 50 } 51 52 if (data_length != GC2235_8BIT) { 53 dev_err(&client->dev, "%s error, invalid data length\n", 54 __func__); 55 return -EINVAL; 56 } 57 58 memset(msg, 0, sizeof(msg)); 59 60 msg[0].addr = client->addr; 61 msg[0].flags = 0; 62 msg[0].len = 1; 63 msg[0].buf = data; 64 65 /* high byte goes out first */ 66 data[0] = (u8)(reg & 0xff); 67 68 msg[1].addr = client->addr; 69 msg[1].len = data_length; 70 msg[1].flags = I2C_M_RD; 71 msg[1].buf = data; 72 73 err = i2c_transfer(client->adapter, msg, 2); 74 if (err != 2) { 75 if (err >= 0) 76 err = -EIO; 77 dev_err(&client->dev, 78 "read from offset 0x%x error %d", reg, err); 79 return err; 80 } 81 82 *val = 0; 83 /* high byte comes first */ 84 if (data_length == GC2235_8BIT) 85 *val = (u8)data[0]; 86 87 return 0; 88 } 89 90 static int gc2235_i2c_write(struct i2c_client *client, u16 len, u8 *data) 91 { 92 struct i2c_msg msg; 93 const int num_msg = 1; 94 int ret; 95 96 msg.addr = client->addr; 97 msg.flags = 0; 98 msg.len = len; 99 msg.buf = data; 100 ret = i2c_transfer(client->adapter, &msg, 1); 101 102 return ret == num_msg ? 0 : -EIO; 103 } 104 105 static int gc2235_write_reg(struct i2c_client *client, u16 data_length, 106 u8 reg, u8 val) 107 { 108 int ret; 109 unsigned char data[4] = {0}; 110 const u16 len = data_length + sizeof(u8); /* 16-bit address + data */ 111 112 if (data_length != GC2235_8BIT) { 113 dev_err(&client->dev, 114 "%s error, invalid data_length\n", __func__); 115 return -EINVAL; 116 } 117 118 /* high byte goes out first */ 119 data[0] = reg; 120 data[1] = val; 121 122 ret = gc2235_i2c_write(client, len, data); 123 if (ret) 124 dev_err(&client->dev, 125 "write error: wrote 0x%x to offset 0x%x error %d", 126 val, reg, ret); 127 128 return ret; 129 } 130 131 static int __gc2235_flush_reg_array(struct i2c_client *client, 132 struct gc2235_write_ctrl *ctrl) 133 { 134 u16 size; 135 136 if (ctrl->index == 0) 137 return 0; 138 139 size = sizeof(u8) + ctrl->index; /* 8-bit address + data */ 140 ctrl->index = 0; 141 142 return gc2235_i2c_write(client, size, (u8 *)&ctrl->buffer); 143 } 144 145 static int __gc2235_buf_reg_array(struct i2c_client *client, 146 struct gc2235_write_ctrl *ctrl, 147 const struct gc2235_reg *next) 148 { 149 int size; 150 151 if (next->type != GC2235_8BIT) 152 return -EINVAL; 153 154 size = 1; 155 ctrl->buffer.data[ctrl->index] = (u8)next->val; 156 157 /* When first item is added, we need to store its starting address */ 158 if (ctrl->index == 0) 159 ctrl->buffer.addr = next->reg; 160 161 ctrl->index += size; 162 163 /* 164 * Buffer cannot guarantee free space for u32? Better flush it to avoid 165 * possible lack of memory for next item. 166 */ 167 if (ctrl->index + sizeof(u8) >= GC2235_MAX_WRITE_BUF_SIZE) 168 return __gc2235_flush_reg_array(client, ctrl); 169 170 return 0; 171 } 172 173 static int __gc2235_write_reg_is_consecutive(struct i2c_client *client, 174 struct gc2235_write_ctrl *ctrl, 175 const struct gc2235_reg *next) 176 { 177 if (ctrl->index == 0) 178 return 1; 179 180 return ctrl->buffer.addr + ctrl->index == next->reg; 181 } 182 183 static int gc2235_write_reg_array(struct i2c_client *client, 184 const struct gc2235_reg *reglist) 185 { 186 const struct gc2235_reg *next = reglist; 187 struct gc2235_write_ctrl ctrl; 188 int err; 189 190 ctrl.index = 0; 191 for (; next->type != GC2235_TOK_TERM; next++) { 192 switch (next->type & GC2235_TOK_MASK) { 193 case GC2235_TOK_DELAY: 194 err = __gc2235_flush_reg_array(client, &ctrl); 195 if (err) 196 return err; 197 msleep(next->val); 198 break; 199 default: 200 /* 201 * If next address is not consecutive, data needs to be 202 * flushed before proceed. 203 */ 204 if (!__gc2235_write_reg_is_consecutive(client, &ctrl, 205 next)) { 206 err = __gc2235_flush_reg_array(client, &ctrl); 207 if (err) 208 return err; 209 } 210 err = __gc2235_buf_reg_array(client, &ctrl, next); 211 if (err) { 212 dev_err(&client->dev, "%s: write error, aborted\n", 213 __func__); 214 return err; 215 } 216 break; 217 } 218 } 219 220 return __gc2235_flush_reg_array(client, &ctrl); 221 } 222 223 static int gc2235_g_focal(struct v4l2_subdev *sd, s32 *val) 224 { 225 *val = (GC2235_FOCAL_LENGTH_NUM << 16) | GC2235_FOCAL_LENGTH_DEM; 226 return 0; 227 } 228 229 static int gc2235_g_fnumber(struct v4l2_subdev *sd, s32 *val) 230 { 231 /*const f number for imx*/ 232 *val = (GC2235_F_NUMBER_DEFAULT_NUM << 16) | GC2235_F_NUMBER_DEM; 233 return 0; 234 } 235 236 static int gc2235_g_fnumber_range(struct v4l2_subdev *sd, s32 *val) 237 { 238 *val = (GC2235_F_NUMBER_DEFAULT_NUM << 24) | 239 (GC2235_F_NUMBER_DEM << 16) | 240 (GC2235_F_NUMBER_DEFAULT_NUM << 8) | GC2235_F_NUMBER_DEM; 241 return 0; 242 } 243 244 static int gc2235_get_intg_factor(struct i2c_client *client, 245 struct camera_mipi_info *info, 246 const struct gc2235_resolution *res) 247 { 248 struct v4l2_subdev *sd = i2c_get_clientdata(client); 249 struct gc2235_device *dev = to_gc2235_sensor(sd); 250 struct atomisp_sensor_mode_data *buf = &info->data; 251 u16 reg_val, reg_val_h; 252 int ret; 253 254 if (!info) 255 return -EINVAL; 256 257 /* pixel clock calculattion */ 258 buf->vt_pix_clk_freq_mhz = dev->vt_pix_clk_freq_mhz = 30000000; 259 260 /* get integration time */ 261 buf->coarse_integration_time_min = GC2235_COARSE_INTG_TIME_MIN; 262 buf->coarse_integration_time_max_margin = 263 GC2235_COARSE_INTG_TIME_MAX_MARGIN; 264 265 buf->fine_integration_time_min = GC2235_FINE_INTG_TIME_MIN; 266 buf->fine_integration_time_max_margin = 267 GC2235_FINE_INTG_TIME_MAX_MARGIN; 268 269 buf->fine_integration_time_def = GC2235_FINE_INTG_TIME_MIN; 270 buf->frame_length_lines = res->lines_per_frame; 271 buf->line_length_pck = res->pixels_per_line; 272 buf->read_mode = res->bin_mode; 273 274 /* get the cropping and output resolution to ISP for this mode. */ 275 ret = gc2235_read_reg(client, GC2235_8BIT, 276 GC2235_H_CROP_START_H, ®_val_h); 277 ret = gc2235_read_reg(client, GC2235_8BIT, 278 GC2235_H_CROP_START_L, ®_val); 279 if (ret) 280 return ret; 281 282 buf->crop_horizontal_start = (reg_val_h << 8) | reg_val; 283 284 ret = gc2235_read_reg(client, GC2235_8BIT, 285 GC2235_V_CROP_START_H, ®_val_h); 286 ret = gc2235_read_reg(client, GC2235_8BIT, 287 GC2235_V_CROP_START_L, ®_val); 288 if (ret) 289 return ret; 290 291 buf->crop_vertical_start = (reg_val_h << 8) | reg_val; 292 293 ret = gc2235_read_reg(client, GC2235_8BIT, 294 GC2235_H_OUTSIZE_H, ®_val_h); 295 ret = gc2235_read_reg(client, GC2235_8BIT, 296 GC2235_H_OUTSIZE_L, ®_val); 297 if (ret) 298 return ret; 299 buf->output_width = (reg_val_h << 8) | reg_val; 300 301 ret = gc2235_read_reg(client, GC2235_8BIT, 302 GC2235_V_OUTSIZE_H, ®_val_h); 303 ret = gc2235_read_reg(client, GC2235_8BIT, 304 GC2235_V_OUTSIZE_L, ®_val); 305 if (ret) 306 return ret; 307 buf->output_height = (reg_val_h << 8) | reg_val; 308 309 buf->crop_horizontal_end = buf->crop_horizontal_start + 310 buf->output_width - 1; 311 buf->crop_vertical_end = buf->crop_vertical_start + 312 buf->output_height - 1; 313 314 ret = gc2235_read_reg(client, GC2235_8BIT, 315 GC2235_HB_H, ®_val_h); 316 ret = gc2235_read_reg(client, GC2235_8BIT, 317 GC2235_HB_L, ®_val); 318 if (ret) 319 return ret; 320 321 #if 0 322 u16 dummy = (reg_val_h << 8) | reg_val; 323 #endif 324 325 ret = gc2235_read_reg(client, GC2235_8BIT, 326 GC2235_SH_DELAY_H, ®_val_h); 327 ret = gc2235_read_reg(client, GC2235_8BIT, 328 GC2235_SH_DELAY_L, ®_val); 329 330 #if 0 331 buf->line_length_pck = buf->output_width + 16 + dummy + 332 (((u16)reg_val_h << 8) | (u16)reg_val) + 4; 333 #endif 334 ret = gc2235_read_reg(client, GC2235_8BIT, 335 GC2235_VB_H, ®_val_h); 336 ret = gc2235_read_reg(client, GC2235_8BIT, 337 GC2235_VB_L, ®_val); 338 if (ret) 339 return ret; 340 341 #if 0 342 buf->frame_length_lines = buf->output_height + 32 + 343 (((u16)reg_val_h << 8) | (u16)reg_val); 344 #endif 345 buf->binning_factor_x = res->bin_factor_x ? 346 res->bin_factor_x : 1; 347 buf->binning_factor_y = res->bin_factor_y ? 348 res->bin_factor_y : 1; 349 return 0; 350 } 351 352 static long __gc2235_set_exposure(struct v4l2_subdev *sd, int coarse_itg, 353 int gain, int digitgain) 354 355 { 356 struct i2c_client *client = v4l2_get_subdevdata(sd); 357 u16 coarse_integration = (u16)coarse_itg; 358 int ret = 0; 359 u16 expo_coarse_h, expo_coarse_l, gain_val = 0xF0, gain_val2 = 0xF0; 360 361 expo_coarse_h = coarse_integration >> 8; 362 expo_coarse_l = coarse_integration & 0xff; 363 364 ret = gc2235_write_reg(client, GC2235_8BIT, 365 GC2235_EXPOSURE_H, expo_coarse_h); 366 ret = gc2235_write_reg(client, GC2235_8BIT, 367 GC2235_EXPOSURE_L, expo_coarse_l); 368 369 if (gain <= 0x58) { 370 gain_val = 0x40; 371 gain_val2 = 0x58; 372 } else if (gain < 256) { 373 gain_val = 0x40; 374 gain_val2 = gain; 375 } else { 376 gain_val2 = 64 * gain / 256; 377 gain_val = 0xff; 378 } 379 380 ret = gc2235_write_reg(client, GC2235_8BIT, 381 GC2235_GLOBAL_GAIN, (u8)gain_val); 382 ret = gc2235_write_reg(client, GC2235_8BIT, 383 GC2235_PRE_GAIN, (u8)gain_val2); 384 385 return ret; 386 } 387 388 static int gc2235_set_exposure(struct v4l2_subdev *sd, int exposure, 389 int gain, int digitgain) 390 { 391 struct gc2235_device *dev = to_gc2235_sensor(sd); 392 int ret; 393 394 mutex_lock(&dev->input_lock); 395 ret = __gc2235_set_exposure(sd, exposure, gain, digitgain); 396 mutex_unlock(&dev->input_lock); 397 398 return ret; 399 } 400 401 static long gc2235_s_exposure(struct v4l2_subdev *sd, 402 struct atomisp_exposure *exposure) 403 { 404 int exp = exposure->integration_time[0]; 405 int gain = exposure->gain[0]; 406 int digitgain = exposure->gain[1]; 407 408 /* we should not accept the invalid value below. */ 409 if (gain == 0) { 410 struct i2c_client *client = v4l2_get_subdevdata(sd); 411 412 v4l2_err(client, "%s: invalid value\n", __func__); 413 return -EINVAL; 414 } 415 416 return gc2235_set_exposure(sd, exp, gain, digitgain); 417 } 418 419 static long gc2235_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) 420 { 421 switch (cmd) { 422 case ATOMISP_IOC_S_EXPOSURE: 423 return gc2235_s_exposure(sd, arg); 424 default: 425 return -EINVAL; 426 } 427 return 0; 428 } 429 430 /* This returns the exposure time being used. This should only be used 431 * for filling in EXIF data, not for actual image processing. 432 */ 433 static int gc2235_q_exposure(struct v4l2_subdev *sd, s32 *value) 434 { 435 struct i2c_client *client = v4l2_get_subdevdata(sd); 436 u16 reg_v, reg_v2; 437 int ret; 438 439 /* get exposure */ 440 ret = gc2235_read_reg(client, GC2235_8BIT, 441 GC2235_EXPOSURE_L, 442 ®_v); 443 if (ret) 444 goto err; 445 446 ret = gc2235_read_reg(client, GC2235_8BIT, 447 GC2235_EXPOSURE_H, 448 ®_v2); 449 if (ret) 450 goto err; 451 452 reg_v += reg_v2 << 8; 453 454 *value = reg_v; 455 err: 456 return ret; 457 } 458 459 static int gc2235_g_volatile_ctrl(struct v4l2_ctrl *ctrl) 460 { 461 struct gc2235_device *dev = 462 container_of(ctrl->handler, struct gc2235_device, ctrl_handler); 463 int ret = 0; 464 465 switch (ctrl->id) { 466 case V4L2_CID_EXPOSURE_ABSOLUTE: 467 ret = gc2235_q_exposure(&dev->sd, &ctrl->val); 468 break; 469 case V4L2_CID_FOCAL_ABSOLUTE: 470 ret = gc2235_g_focal(&dev->sd, &ctrl->val); 471 break; 472 case V4L2_CID_FNUMBER_ABSOLUTE: 473 ret = gc2235_g_fnumber(&dev->sd, &ctrl->val); 474 break; 475 case V4L2_CID_FNUMBER_RANGE: 476 ret = gc2235_g_fnumber_range(&dev->sd, &ctrl->val); 477 break; 478 default: 479 ret = -EINVAL; 480 } 481 482 return ret; 483 } 484 485 static const struct v4l2_ctrl_ops ctrl_ops = { 486 .g_volatile_ctrl = gc2235_g_volatile_ctrl 487 }; 488 489 static struct v4l2_ctrl_config gc2235_controls[] = { 490 { 491 .ops = &ctrl_ops, 492 .id = V4L2_CID_EXPOSURE_ABSOLUTE, 493 .type = V4L2_CTRL_TYPE_INTEGER, 494 .name = "exposure", 495 .min = 0x0, 496 .max = 0xffff, 497 .step = 0x01, 498 .def = 0x00, 499 .flags = 0, 500 }, 501 { 502 .ops = &ctrl_ops, 503 .id = V4L2_CID_FOCAL_ABSOLUTE, 504 .type = V4L2_CTRL_TYPE_INTEGER, 505 .name = "focal length", 506 .min = GC2235_FOCAL_LENGTH_DEFAULT, 507 .max = GC2235_FOCAL_LENGTH_DEFAULT, 508 .step = 0x01, 509 .def = GC2235_FOCAL_LENGTH_DEFAULT, 510 .flags = 0, 511 }, 512 { 513 .ops = &ctrl_ops, 514 .id = V4L2_CID_FNUMBER_ABSOLUTE, 515 .type = V4L2_CTRL_TYPE_INTEGER, 516 .name = "f-number", 517 .min = GC2235_F_NUMBER_DEFAULT, 518 .max = GC2235_F_NUMBER_DEFAULT, 519 .step = 0x01, 520 .def = GC2235_F_NUMBER_DEFAULT, 521 .flags = 0, 522 }, 523 { 524 .ops = &ctrl_ops, 525 .id = V4L2_CID_FNUMBER_RANGE, 526 .type = V4L2_CTRL_TYPE_INTEGER, 527 .name = "f-number range", 528 .min = GC2235_F_NUMBER_RANGE, 529 .max = GC2235_F_NUMBER_RANGE, 530 .step = 0x01, 531 .def = GC2235_F_NUMBER_RANGE, 532 .flags = 0, 533 }, 534 }; 535 536 static int __gc2235_init(struct v4l2_subdev *sd) 537 { 538 struct i2c_client *client = v4l2_get_subdevdata(sd); 539 540 /* restore settings */ 541 gc2235_res = gc2235_res_preview; 542 N_RES = N_RES_PREVIEW; 543 544 return gc2235_write_reg_array(client, gc2235_init_settings); 545 } 546 547 static int is_init; 548 549 static int power_ctrl(struct v4l2_subdev *sd, bool flag) 550 { 551 int ret = -1; 552 struct gc2235_device *dev = to_gc2235_sensor(sd); 553 554 if (!dev || !dev->platform_data) 555 return -ENODEV; 556 557 if (flag) { 558 ret = dev->platform_data->v1p8_ctrl(sd, 1); 559 usleep_range(60, 90); 560 if (ret == 0) 561 ret |= dev->platform_data->v2p8_ctrl(sd, 1); 562 } else { 563 ret = dev->platform_data->v1p8_ctrl(sd, 0); 564 ret |= dev->platform_data->v2p8_ctrl(sd, 0); 565 } 566 return ret; 567 } 568 569 static int gpio_ctrl(struct v4l2_subdev *sd, bool flag) 570 { 571 struct gc2235_device *dev = to_gc2235_sensor(sd); 572 int ret = -1; 573 574 if (!dev || !dev->platform_data) 575 return -ENODEV; 576 577 ret |= dev->platform_data->gpio1_ctrl(sd, !flag); 578 usleep_range(60, 90); 579 return dev->platform_data->gpio0_ctrl(sd, flag); 580 } 581 582 static int power_up(struct v4l2_subdev *sd) 583 { 584 struct gc2235_device *dev = to_gc2235_sensor(sd); 585 struct i2c_client *client = v4l2_get_subdevdata(sd); 586 int ret; 587 588 if (!dev->platform_data) { 589 dev_err(&client->dev, 590 "no camera_sensor_platform_data"); 591 return -ENODEV; 592 } 593 /* power control */ 594 ret = power_ctrl(sd, 1); 595 if (ret) 596 goto fail_power; 597 598 /* according to DS, at least 5ms is needed between DOVDD and PWDN */ 599 usleep_range(5000, 6000); 600 601 ret = dev->platform_data->flisclk_ctrl(sd, 1); 602 if (ret) 603 goto fail_clk; 604 usleep_range(5000, 6000); 605 606 /* gpio ctrl */ 607 ret = gpio_ctrl(sd, 1); 608 if (ret) { 609 ret = gpio_ctrl(sd, 1); 610 if (ret) 611 goto fail_power; 612 } 613 614 msleep(5); 615 return 0; 616 617 fail_clk: 618 gpio_ctrl(sd, 0); 619 fail_power: 620 power_ctrl(sd, 0); 621 dev_err(&client->dev, "sensor power-up failed\n"); 622 623 return ret; 624 } 625 626 static int power_down(struct v4l2_subdev *sd) 627 { 628 struct gc2235_device *dev = to_gc2235_sensor(sd); 629 struct i2c_client *client = v4l2_get_subdevdata(sd); 630 int ret = 0; 631 632 if (!dev->platform_data) { 633 dev_err(&client->dev, 634 "no camera_sensor_platform_data"); 635 return -ENODEV; 636 } 637 /* gpio ctrl */ 638 ret = gpio_ctrl(sd, 0); 639 if (ret) { 640 ret = gpio_ctrl(sd, 0); 641 if (ret) 642 dev_err(&client->dev, "gpio failed 2\n"); 643 } 644 645 ret = dev->platform_data->flisclk_ctrl(sd, 0); 646 if (ret) 647 dev_err(&client->dev, "flisclk failed\n"); 648 649 /* power control */ 650 ret = power_ctrl(sd, 0); 651 if (ret) 652 dev_err(&client->dev, "vprog failed.\n"); 653 654 return ret; 655 } 656 657 static int gc2235_s_power(struct v4l2_subdev *sd, int on) 658 { 659 int ret; 660 661 if (on == 0) 662 ret = power_down(sd); 663 else { 664 ret = power_up(sd); 665 if (!ret) 666 ret = __gc2235_init(sd); 667 is_init = 1; 668 } 669 return ret; 670 } 671 672 /* 673 * distance - calculate the distance 674 * @res: resolution 675 * @w: width 676 * @h: height 677 * 678 * Get the gap between resolution and w/h. 679 * res->width/height smaller than w/h wouldn't be considered. 680 * Returns the value of gap or -1 if fail. 681 */ 682 #define LARGEST_ALLOWED_RATIO_MISMATCH 800 683 static int distance(struct gc2235_resolution *res, u32 w, u32 h) 684 { 685 unsigned int w_ratio = (res->width << 13) / w; 686 unsigned int h_ratio; 687 int match; 688 689 if (h == 0) 690 return -1; 691 h_ratio = (res->height << 13) / h; 692 if (h_ratio == 0) 693 return -1; 694 match = abs(((w_ratio << 13) / h_ratio) - 8192); 695 696 if ((w_ratio < 8192) || (h_ratio < 8192) || 697 (match > LARGEST_ALLOWED_RATIO_MISMATCH)) 698 return -1; 699 700 return w_ratio + h_ratio; 701 } 702 703 /* Return the nearest higher resolution index */ 704 static int nearest_resolution_index(int w, int h) 705 { 706 int i; 707 int idx = -1; 708 int dist; 709 int min_dist = INT_MAX; 710 struct gc2235_resolution *tmp_res = NULL; 711 712 for (i = 0; i < N_RES; i++) { 713 tmp_res = &gc2235_res[i]; 714 dist = distance(tmp_res, w, h); 715 if (dist == -1) 716 continue; 717 if (dist < min_dist) { 718 min_dist = dist; 719 idx = i; 720 } 721 } 722 723 return idx; 724 } 725 726 static int get_resolution_index(int w, int h) 727 { 728 int i; 729 730 for (i = 0; i < N_RES; i++) { 731 if (w != gc2235_res[i].width) 732 continue; 733 if (h != gc2235_res[i].height) 734 continue; 735 736 return i; 737 } 738 739 return -1; 740 } 741 742 static int startup(struct v4l2_subdev *sd) 743 { 744 struct gc2235_device *dev = to_gc2235_sensor(sd); 745 struct i2c_client *client = v4l2_get_subdevdata(sd); 746 int ret = 0; 747 748 if (is_init == 0) { 749 /* force gc2235 to do a reset in res change, otherwise it 750 * can not output normal after switching res. and it is not 751 * necessary for first time run up after power on, for the sack 752 * of performance 753 */ 754 power_down(sd); 755 power_up(sd); 756 gc2235_write_reg_array(client, gc2235_init_settings); 757 } 758 759 ret = gc2235_write_reg_array(client, gc2235_res[dev->fmt_idx].regs); 760 if (ret) { 761 dev_err(&client->dev, "gc2235 write register err.\n"); 762 return ret; 763 } 764 is_init = 0; 765 766 return ret; 767 } 768 769 static int gc2235_set_fmt(struct v4l2_subdev *sd, 770 struct v4l2_subdev_pad_config *cfg, 771 struct v4l2_subdev_format *format) 772 { 773 struct v4l2_mbus_framefmt *fmt = &format->format; 774 struct gc2235_device *dev = to_gc2235_sensor(sd); 775 struct i2c_client *client = v4l2_get_subdevdata(sd); 776 struct camera_mipi_info *gc2235_info = NULL; 777 int ret = 0; 778 int idx; 779 780 gc2235_info = v4l2_get_subdev_hostdata(sd); 781 if (!gc2235_info) 782 return -EINVAL; 783 if (format->pad) 784 return -EINVAL; 785 if (!fmt) 786 return -EINVAL; 787 mutex_lock(&dev->input_lock); 788 idx = nearest_resolution_index(fmt->width, fmt->height); 789 if (idx == -1) { 790 /* return the largest resolution */ 791 fmt->width = gc2235_res[N_RES - 1].width; 792 fmt->height = gc2235_res[N_RES - 1].height; 793 } else { 794 fmt->width = gc2235_res[idx].width; 795 fmt->height = gc2235_res[idx].height; 796 } 797 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; 798 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 799 cfg->try_fmt = *fmt; 800 mutex_unlock(&dev->input_lock); 801 return 0; 802 } 803 804 dev->fmt_idx = get_resolution_index(fmt->width, fmt->height); 805 if (dev->fmt_idx == -1) { 806 dev_err(&client->dev, "get resolution fail\n"); 807 mutex_unlock(&dev->input_lock); 808 return -EINVAL; 809 } 810 811 ret = startup(sd); 812 if (ret) { 813 dev_err(&client->dev, "gc2235 startup err\n"); 814 goto err; 815 } 816 817 ret = gc2235_get_intg_factor(client, gc2235_info, 818 &gc2235_res[dev->fmt_idx]); 819 if (ret) 820 dev_err(&client->dev, "failed to get integration_factor\n"); 821 822 err: 823 mutex_unlock(&dev->input_lock); 824 return ret; 825 } 826 827 static int gc2235_get_fmt(struct v4l2_subdev *sd, 828 struct v4l2_subdev_pad_config *cfg, 829 struct v4l2_subdev_format *format) 830 { 831 struct v4l2_mbus_framefmt *fmt = &format->format; 832 struct gc2235_device *dev = to_gc2235_sensor(sd); 833 834 if (format->pad) 835 return -EINVAL; 836 837 if (!fmt) 838 return -EINVAL; 839 840 fmt->width = gc2235_res[dev->fmt_idx].width; 841 fmt->height = gc2235_res[dev->fmt_idx].height; 842 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; 843 844 return 0; 845 } 846 847 static int gc2235_detect(struct i2c_client *client) 848 { 849 struct i2c_adapter *adapter = client->adapter; 850 u16 high, low; 851 int ret; 852 u16 id; 853 854 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) 855 return -ENODEV; 856 857 ret = gc2235_read_reg(client, GC2235_8BIT, 858 GC2235_SENSOR_ID_H, &high); 859 if (ret) { 860 dev_err(&client->dev, "sensor_id_high = 0x%x\n", high); 861 return -ENODEV; 862 } 863 ret = gc2235_read_reg(client, GC2235_8BIT, 864 GC2235_SENSOR_ID_L, &low); 865 id = ((high << 8) | low); 866 867 if (id != GC2235_ID) { 868 dev_err(&client->dev, "sensor ID error, 0x%x\n", id); 869 return -ENODEV; 870 } 871 872 dev_info(&client->dev, "detect gc2235 success\n"); 873 return 0; 874 } 875 876 static int gc2235_s_stream(struct v4l2_subdev *sd, int enable) 877 { 878 struct gc2235_device *dev = to_gc2235_sensor(sd); 879 struct i2c_client *client = v4l2_get_subdevdata(sd); 880 int ret; 881 882 mutex_lock(&dev->input_lock); 883 884 if (enable) 885 ret = gc2235_write_reg_array(client, gc2235_stream_on); 886 else 887 ret = gc2235_write_reg_array(client, gc2235_stream_off); 888 889 mutex_unlock(&dev->input_lock); 890 return ret; 891 } 892 893 static int gc2235_s_config(struct v4l2_subdev *sd, 894 int irq, void *platform_data) 895 { 896 struct gc2235_device *dev = to_gc2235_sensor(sd); 897 struct i2c_client *client = v4l2_get_subdevdata(sd); 898 int ret = 0; 899 900 if (!platform_data) 901 return -ENODEV; 902 903 dev->platform_data = 904 (struct camera_sensor_platform_data *)platform_data; 905 906 mutex_lock(&dev->input_lock); 907 /* power off the module, then power on it in future 908 * as first power on by board may not fulfill the 909 * power on sequqence needed by the module 910 */ 911 ret = power_down(sd); 912 if (ret) { 913 dev_err(&client->dev, "gc2235 power-off err.\n"); 914 goto fail_power_off; 915 } 916 917 ret = power_up(sd); 918 if (ret) { 919 dev_err(&client->dev, "gc2235 power-up err.\n"); 920 goto fail_power_on; 921 } 922 923 ret = dev->platform_data->csi_cfg(sd, 1); 924 if (ret) 925 goto fail_csi_cfg; 926 927 /* config & detect sensor */ 928 ret = gc2235_detect(client); 929 if (ret) { 930 dev_err(&client->dev, "gc2235_detect err s_config.\n"); 931 goto fail_csi_cfg; 932 } 933 934 /* turn off sensor, after probed */ 935 ret = power_down(sd); 936 if (ret) { 937 dev_err(&client->dev, "gc2235 power-off err.\n"); 938 goto fail_csi_cfg; 939 } 940 mutex_unlock(&dev->input_lock); 941 942 return 0; 943 944 fail_csi_cfg: 945 dev->platform_data->csi_cfg(sd, 0); 946 fail_power_on: 947 power_down(sd); 948 dev_err(&client->dev, "sensor power-gating failed\n"); 949 fail_power_off: 950 mutex_unlock(&dev->input_lock); 951 return ret; 952 } 953 954 static int gc2235_g_frame_interval(struct v4l2_subdev *sd, 955 struct v4l2_subdev_frame_interval *interval) 956 { 957 struct gc2235_device *dev = to_gc2235_sensor(sd); 958 959 interval->interval.numerator = 1; 960 interval->interval.denominator = gc2235_res[dev->fmt_idx].fps; 961 962 return 0; 963 } 964 965 static int gc2235_enum_mbus_code(struct v4l2_subdev *sd, 966 struct v4l2_subdev_pad_config *cfg, 967 struct v4l2_subdev_mbus_code_enum *code) 968 { 969 if (code->index >= MAX_FMTS) 970 return -EINVAL; 971 972 code->code = MEDIA_BUS_FMT_SBGGR10_1X10; 973 return 0; 974 } 975 976 static int gc2235_enum_frame_size(struct v4l2_subdev *sd, 977 struct v4l2_subdev_pad_config *cfg, 978 struct v4l2_subdev_frame_size_enum *fse) 979 { 980 int index = fse->index; 981 982 if (index >= N_RES) 983 return -EINVAL; 984 985 fse->min_width = gc2235_res[index].width; 986 fse->min_height = gc2235_res[index].height; 987 fse->max_width = gc2235_res[index].width; 988 fse->max_height = gc2235_res[index].height; 989 990 return 0; 991 } 992 993 static int gc2235_g_skip_frames(struct v4l2_subdev *sd, u32 *frames) 994 { 995 struct gc2235_device *dev = to_gc2235_sensor(sd); 996 997 mutex_lock(&dev->input_lock); 998 *frames = gc2235_res[dev->fmt_idx].skip_frames; 999 mutex_unlock(&dev->input_lock); 1000 1001 return 0; 1002 } 1003 1004 static const struct v4l2_subdev_sensor_ops gc2235_sensor_ops = { 1005 .g_skip_frames = gc2235_g_skip_frames, 1006 }; 1007 1008 static const struct v4l2_subdev_video_ops gc2235_video_ops = { 1009 .s_stream = gc2235_s_stream, 1010 .g_frame_interval = gc2235_g_frame_interval, 1011 }; 1012 1013 static const struct v4l2_subdev_core_ops gc2235_core_ops = { 1014 .s_power = gc2235_s_power, 1015 .ioctl = gc2235_ioctl, 1016 }; 1017 1018 static const struct v4l2_subdev_pad_ops gc2235_pad_ops = { 1019 .enum_mbus_code = gc2235_enum_mbus_code, 1020 .enum_frame_size = gc2235_enum_frame_size, 1021 .get_fmt = gc2235_get_fmt, 1022 .set_fmt = gc2235_set_fmt, 1023 }; 1024 1025 static const struct v4l2_subdev_ops gc2235_ops = { 1026 .core = &gc2235_core_ops, 1027 .video = &gc2235_video_ops, 1028 .pad = &gc2235_pad_ops, 1029 .sensor = &gc2235_sensor_ops, 1030 }; 1031 1032 static int gc2235_remove(struct i2c_client *client) 1033 { 1034 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1035 struct gc2235_device *dev = to_gc2235_sensor(sd); 1036 1037 dev_dbg(&client->dev, "gc2235_remove...\n"); 1038 1039 dev->platform_data->csi_cfg(sd, 0); 1040 1041 v4l2_device_unregister_subdev(sd); 1042 media_entity_cleanup(&dev->sd.entity); 1043 v4l2_ctrl_handler_free(&dev->ctrl_handler); 1044 kfree(dev); 1045 1046 return 0; 1047 } 1048 1049 static int gc2235_probe(struct i2c_client *client) 1050 { 1051 struct gc2235_device *dev; 1052 void *gcpdev; 1053 int ret; 1054 unsigned int i; 1055 1056 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1057 if (!dev) 1058 return -ENOMEM; 1059 1060 mutex_init(&dev->input_lock); 1061 1062 dev->fmt_idx = 0; 1063 v4l2_i2c_subdev_init(&dev->sd, client, &gc2235_ops); 1064 1065 gcpdev = gmin_camera_platform_data(&dev->sd, 1066 ATOMISP_INPUT_FORMAT_RAW_10, 1067 atomisp_bayer_order_grbg); 1068 1069 ret = gc2235_s_config(&dev->sd, client->irq, gcpdev); 1070 if (ret) 1071 goto out_free; 1072 1073 dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 1074 dev->pad.flags = MEDIA_PAD_FL_SOURCE; 1075 dev->format.code = MEDIA_BUS_FMT_SBGGR10_1X10; 1076 dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 1077 ret = 1078 v4l2_ctrl_handler_init(&dev->ctrl_handler, 1079 ARRAY_SIZE(gc2235_controls)); 1080 if (ret) { 1081 gc2235_remove(client); 1082 return ret; 1083 } 1084 1085 for (i = 0; i < ARRAY_SIZE(gc2235_controls); i++) 1086 v4l2_ctrl_new_custom(&dev->ctrl_handler, &gc2235_controls[i], 1087 NULL); 1088 1089 if (dev->ctrl_handler.error) { 1090 gc2235_remove(client); 1091 return dev->ctrl_handler.error; 1092 } 1093 1094 /* Use same lock for controls as for everything else. */ 1095 dev->ctrl_handler.lock = &dev->input_lock; 1096 dev->sd.ctrl_handler = &dev->ctrl_handler; 1097 1098 ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad); 1099 if (ret) 1100 gc2235_remove(client); 1101 1102 return atomisp_register_i2c_module(&dev->sd, gcpdev, RAW_CAMERA); 1103 1104 out_free: 1105 v4l2_device_unregister_subdev(&dev->sd); 1106 kfree(dev); 1107 1108 return ret; 1109 } 1110 1111 static const struct acpi_device_id gc2235_acpi_match[] = { 1112 { "INT33F8" }, 1113 {}, 1114 }; 1115 MODULE_DEVICE_TABLE(acpi, gc2235_acpi_match); 1116 1117 static struct i2c_driver gc2235_driver = { 1118 .driver = { 1119 .name = "gc2235", 1120 .acpi_match_table = gc2235_acpi_match, 1121 }, 1122 .probe_new = gc2235_probe, 1123 .remove = gc2235_remove, 1124 }; 1125 module_i2c_driver(gc2235_driver); 1126 1127 MODULE_AUTHOR("Shuguang Gong <Shuguang.Gong@intel.com>"); 1128 MODULE_DESCRIPTION("A low-level driver for GC2235 sensors"); 1129 MODULE_LICENSE("GPL"); 1130