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 */ 39static 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 90static 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 105static 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 131static 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 145static 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 173static 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 183static 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 223static long __gc2235_set_exposure(struct v4l2_subdev *sd, int coarse_itg, 224 int gain, int digitgain) 225 226{ 227 struct i2c_client *client = v4l2_get_subdevdata(sd); 228 u16 coarse_integration = (u16)coarse_itg; 229 int ret = 0; 230 u16 expo_coarse_h, expo_coarse_l, gain_val = 0xF0, gain_val2 = 0xF0; 231 232 expo_coarse_h = coarse_integration >> 8; 233 expo_coarse_l = coarse_integration & 0xff; 234 235 ret = gc2235_write_reg(client, GC2235_8BIT, 236 GC2235_EXPOSURE_H, expo_coarse_h); 237 ret = gc2235_write_reg(client, GC2235_8BIT, 238 GC2235_EXPOSURE_L, expo_coarse_l); 239 240 if (gain <= 0x58) { 241 gain_val = 0x40; 242 gain_val2 = 0x58; 243 } else if (gain < 256) { 244 gain_val = 0x40; 245 gain_val2 = gain; 246 } else { 247 gain_val2 = 64 * gain / 256; 248 gain_val = 0xff; 249 } 250 251 ret = gc2235_write_reg(client, GC2235_8BIT, 252 GC2235_GLOBAL_GAIN, (u8)gain_val); 253 ret = gc2235_write_reg(client, GC2235_8BIT, 254 GC2235_PRE_GAIN, (u8)gain_val2); 255 256 return ret; 257} 258 259static int gc2235_set_exposure(struct v4l2_subdev *sd, int exposure, 260 int gain, int digitgain) 261{ 262 struct gc2235_device *dev = to_gc2235_sensor(sd); 263 int ret; 264 265 mutex_lock(&dev->input_lock); 266 ret = __gc2235_set_exposure(sd, exposure, gain, digitgain); 267 mutex_unlock(&dev->input_lock); 268 269 return ret; 270} 271 272static long gc2235_s_exposure(struct v4l2_subdev *sd, 273 struct atomisp_exposure *exposure) 274{ 275 int exp = exposure->integration_time[0]; 276 int gain = exposure->gain[0]; 277 int digitgain = exposure->gain[1]; 278 279 /* we should not accept the invalid value below. */ 280 if (gain == 0) { 281 struct i2c_client *client = v4l2_get_subdevdata(sd); 282 283 v4l2_err(client, "%s: invalid value\n", __func__); 284 return -EINVAL; 285 } 286 287 return gc2235_set_exposure(sd, exp, gain, digitgain); 288} 289 290static long gc2235_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) 291{ 292 switch (cmd) { 293 case ATOMISP_IOC_S_EXPOSURE: 294 return gc2235_s_exposure(sd, arg); 295 default: 296 return -EINVAL; 297 } 298 return 0; 299} 300 301/* 302 * This returns the exposure time being used. This should only be used 303 * for filling in EXIF data, not for actual image processing. 304 */ 305static int gc2235_q_exposure(struct v4l2_subdev *sd, s32 *value) 306{ 307 struct i2c_client *client = v4l2_get_subdevdata(sd); 308 u16 reg_v, reg_v2; 309 int ret; 310 311 /* get exposure */ 312 ret = gc2235_read_reg(client, GC2235_8BIT, 313 GC2235_EXPOSURE_L, 314 ®_v); 315 if (ret) 316 goto err; 317 318 ret = gc2235_read_reg(client, GC2235_8BIT, 319 GC2235_EXPOSURE_H, 320 ®_v2); 321 if (ret) 322 goto err; 323 324 reg_v += reg_v2 << 8; 325 326 *value = reg_v; 327err: 328 return ret; 329} 330 331static int gc2235_g_volatile_ctrl(struct v4l2_ctrl *ctrl) 332{ 333 struct gc2235_device *dev = 334 container_of(ctrl->handler, struct gc2235_device, ctrl_handler); 335 int ret = 0; 336 337 switch (ctrl->id) { 338 case V4L2_CID_EXPOSURE_ABSOLUTE: 339 ret = gc2235_q_exposure(&dev->sd, &ctrl->val); 340 break; 341 default: 342 ret = -EINVAL; 343 } 344 345 return ret; 346} 347 348static const struct v4l2_ctrl_ops ctrl_ops = { 349 .g_volatile_ctrl = gc2235_g_volatile_ctrl 350}; 351 352static struct v4l2_ctrl_config gc2235_controls[] = { 353 { 354 .ops = &ctrl_ops, 355 .id = V4L2_CID_EXPOSURE_ABSOLUTE, 356 .type = V4L2_CTRL_TYPE_INTEGER, 357 .name = "exposure", 358 .min = 0x0, 359 .max = 0xffff, 360 .step = 0x01, 361 .def = 0x00, 362 .flags = 0, 363 }, 364}; 365 366static int __gc2235_init(struct v4l2_subdev *sd) 367{ 368 struct i2c_client *client = v4l2_get_subdevdata(sd); 369 370 /* restore settings */ 371 gc2235_res = gc2235_res_preview; 372 N_RES = N_RES_PREVIEW; 373 374 return gc2235_write_reg_array(client, gc2235_init_settings); 375} 376 377static int is_init; 378 379static int power_ctrl(struct v4l2_subdev *sd, bool flag) 380{ 381 int ret = -1; 382 struct gc2235_device *dev = to_gc2235_sensor(sd); 383 384 if (!dev || !dev->platform_data) 385 return -ENODEV; 386 387 if (flag) { 388 ret = dev->platform_data->v1p8_ctrl(sd, 1); 389 usleep_range(60, 90); 390 if (ret == 0) 391 ret |= dev->platform_data->v2p8_ctrl(sd, 1); 392 } else { 393 ret = dev->platform_data->v1p8_ctrl(sd, 0); 394 ret |= dev->platform_data->v2p8_ctrl(sd, 0); 395 } 396 return ret; 397} 398 399static int gpio_ctrl(struct v4l2_subdev *sd, bool flag) 400{ 401 struct gc2235_device *dev = to_gc2235_sensor(sd); 402 int ret; 403 404 if (!dev || !dev->platform_data) 405 return -ENODEV; 406 407 ret = dev->platform_data->gpio1_ctrl(sd, !flag); 408 usleep_range(60, 90); 409 ret |= dev->platform_data->gpio0_ctrl(sd, flag); 410 411 return ret; 412} 413 414static int power_up(struct v4l2_subdev *sd) 415{ 416 struct gc2235_device *dev = to_gc2235_sensor(sd); 417 struct i2c_client *client = v4l2_get_subdevdata(sd); 418 int ret; 419 420 if (!dev->platform_data) { 421 dev_err(&client->dev, 422 "no camera_sensor_platform_data"); 423 return -ENODEV; 424 } 425 /* power control */ 426 ret = power_ctrl(sd, 1); 427 if (ret) 428 goto fail_power; 429 430 /* according to DS, at least 5ms is needed between DOVDD and PWDN */ 431 usleep_range(5000, 6000); 432 433 ret = dev->platform_data->flisclk_ctrl(sd, 1); 434 if (ret) 435 goto fail_clk; 436 usleep_range(5000, 6000); 437 438 /* gpio ctrl */ 439 ret = gpio_ctrl(sd, 1); 440 if (ret) { 441 ret = gpio_ctrl(sd, 1); 442 if (ret) 443 goto fail_power; 444 } 445 446 msleep(5); 447 return 0; 448 449fail_clk: 450 gpio_ctrl(sd, 0); 451fail_power: 452 power_ctrl(sd, 0); 453 dev_err(&client->dev, "sensor power-up failed\n"); 454 455 return ret; 456} 457 458static int power_down(struct v4l2_subdev *sd) 459{ 460 struct gc2235_device *dev = to_gc2235_sensor(sd); 461 struct i2c_client *client = v4l2_get_subdevdata(sd); 462 int ret = 0; 463 464 if (!dev->platform_data) { 465 dev_err(&client->dev, 466 "no camera_sensor_platform_data"); 467 return -ENODEV; 468 } 469 /* gpio ctrl */ 470 ret = gpio_ctrl(sd, 0); 471 if (ret) { 472 ret = gpio_ctrl(sd, 0); 473 if (ret) 474 dev_err(&client->dev, "gpio failed 2\n"); 475 } 476 477 ret = dev->platform_data->flisclk_ctrl(sd, 0); 478 if (ret) 479 dev_err(&client->dev, "flisclk failed\n"); 480 481 /* power control */ 482 ret = power_ctrl(sd, 0); 483 if (ret) 484 dev_err(&client->dev, "vprog failed.\n"); 485 486 return ret; 487} 488 489static int gc2235_s_power(struct v4l2_subdev *sd, int on) 490{ 491 int ret; 492 493 if (on == 0) { 494 ret = power_down(sd); 495 } else { 496 ret = power_up(sd); 497 if (!ret) 498 ret = __gc2235_init(sd); 499 is_init = 1; 500 } 501 return ret; 502} 503 504static int startup(struct v4l2_subdev *sd) 505{ 506 struct gc2235_device *dev = to_gc2235_sensor(sd); 507 struct i2c_client *client = v4l2_get_subdevdata(sd); 508 int ret = 0; 509 510 if (is_init == 0) { 511 /* 512 * force gc2235 to do a reset in res change, otherwise it 513 * can not output normal after switching res. and it is not 514 * necessary for first time run up after power on, for the sack 515 * of performance 516 */ 517 power_down(sd); 518 power_up(sd); 519 gc2235_write_reg_array(client, gc2235_init_settings); 520 } 521 522 ret = gc2235_write_reg_array(client, dev->res->regs); 523 if (ret) { 524 dev_err(&client->dev, "gc2235 write register err.\n"); 525 return ret; 526 } 527 is_init = 0; 528 529 return ret; 530} 531 532static int gc2235_set_fmt(struct v4l2_subdev *sd, 533 struct v4l2_subdev_state *sd_state, 534 struct v4l2_subdev_format *format) 535{ 536 struct v4l2_mbus_framefmt *fmt = &format->format; 537 struct gc2235_device *dev = to_gc2235_sensor(sd); 538 struct i2c_client *client = v4l2_get_subdevdata(sd); 539 struct camera_mipi_info *gc2235_info = NULL; 540 struct gc2235_resolution *res; 541 int ret = 0; 542 543 gc2235_info = v4l2_get_subdev_hostdata(sd); 544 if (!gc2235_info) 545 return -EINVAL; 546 if (format->pad) 547 return -EINVAL; 548 if (!fmt) 549 return -EINVAL; 550 551 mutex_lock(&dev->input_lock); 552 res = v4l2_find_nearest_size(gc2235_res_preview, 553 ARRAY_SIZE(gc2235_res_preview), width, 554 height, fmt->width, fmt->height); 555 if (!res) 556 res = &gc2235_res_preview[N_RES - 1]; 557 558 fmt->width = res->width; 559 fmt->height = res->height; 560 dev->res = res; 561 562 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; 563 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 564 *v4l2_subdev_state_get_format(sd_state, 0) = *fmt; 565 mutex_unlock(&dev->input_lock); 566 return 0; 567 } 568 569 ret = startup(sd); 570 if (ret) { 571 dev_err(&client->dev, "gc2235 startup err\n"); 572 goto err; 573 } 574 575err: 576 mutex_unlock(&dev->input_lock); 577 return ret; 578} 579 580static int gc2235_get_fmt(struct v4l2_subdev *sd, 581 struct v4l2_subdev_state *sd_state, 582 struct v4l2_subdev_format *format) 583{ 584 struct v4l2_mbus_framefmt *fmt = &format->format; 585 struct gc2235_device *dev = to_gc2235_sensor(sd); 586 587 if (format->pad) 588 return -EINVAL; 589 590 if (!fmt) 591 return -EINVAL; 592 593 fmt->width = dev->res->width; 594 fmt->height = dev->res->height; 595 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; 596 597 return 0; 598} 599 600static int gc2235_detect(struct i2c_client *client) 601{ 602 struct i2c_adapter *adapter = client->adapter; 603 u16 high = 0, low = 0; 604 u16 id; 605 606 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) 607 return -ENODEV; 608 609 gc2235_read_reg(client, GC2235_8BIT, GC2235_SENSOR_ID_H, &high); 610 gc2235_read_reg(client, GC2235_8BIT, GC2235_SENSOR_ID_L, &low); 611 id = ((high << 8) | low); 612 613 if (id != GC2235_ID) { 614 dev_err(&client->dev, "sensor ID error, 0x%x\n", id); 615 return -ENODEV; 616 } 617 618 dev_info(&client->dev, "detect gc2235 success\n"); 619 return 0; 620} 621 622static int gc2235_s_stream(struct v4l2_subdev *sd, int enable) 623{ 624 struct gc2235_device *dev = to_gc2235_sensor(sd); 625 struct i2c_client *client = v4l2_get_subdevdata(sd); 626 int ret; 627 628 mutex_lock(&dev->input_lock); 629 630 if (enable) 631 ret = gc2235_write_reg_array(client, gc2235_stream_on); 632 else 633 ret = gc2235_write_reg_array(client, gc2235_stream_off); 634 635 mutex_unlock(&dev->input_lock); 636 return ret; 637} 638 639static int gc2235_s_config(struct v4l2_subdev *sd, 640 int irq, void *platform_data) 641{ 642 struct gc2235_device *dev = to_gc2235_sensor(sd); 643 struct i2c_client *client = v4l2_get_subdevdata(sd); 644 int ret = 0; 645 646 if (!platform_data) 647 return -ENODEV; 648 649 dev->platform_data = 650 (struct camera_sensor_platform_data *)platform_data; 651 652 mutex_lock(&dev->input_lock); 653 /* 654 * power off the module, then power on it in future 655 * as first power on by board may not fulfill the 656 * power on sequqence needed by the module 657 */ 658 ret = power_down(sd); 659 if (ret) { 660 dev_err(&client->dev, "gc2235 power-off err.\n"); 661 goto fail_power_off; 662 } 663 664 ret = power_up(sd); 665 if (ret) { 666 dev_err(&client->dev, "gc2235 power-up err.\n"); 667 goto fail_power_on; 668 } 669 670 ret = dev->platform_data->csi_cfg(sd, 1); 671 if (ret) 672 goto fail_csi_cfg; 673 674 /* config & detect sensor */ 675 ret = gc2235_detect(client); 676 if (ret) { 677 dev_err(&client->dev, "gc2235_detect err s_config.\n"); 678 goto fail_csi_cfg; 679 } 680 681 /* turn off sensor, after probed */ 682 ret = power_down(sd); 683 if (ret) { 684 dev_err(&client->dev, "gc2235 power-off err.\n"); 685 goto fail_csi_cfg; 686 } 687 mutex_unlock(&dev->input_lock); 688 689 return 0; 690 691fail_csi_cfg: 692 dev->platform_data->csi_cfg(sd, 0); 693fail_power_on: 694 power_down(sd); 695 dev_err(&client->dev, "sensor power-gating failed\n"); 696fail_power_off: 697 mutex_unlock(&dev->input_lock); 698 return ret; 699} 700 701static int gc2235_get_frame_interval(struct v4l2_subdev *sd, 702 struct v4l2_subdev_state *sd_state, 703 struct v4l2_subdev_frame_interval *interval) 704{ 705 struct gc2235_device *dev = to_gc2235_sensor(sd); 706 707 /* 708 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2 709 * subdev active state API. 710 */ 711 if (interval->which != V4L2_SUBDEV_FORMAT_ACTIVE) 712 return -EINVAL; 713 714 interval->interval.numerator = 1; 715 interval->interval.denominator = dev->res->fps; 716 717 return 0; 718} 719 720static int gc2235_enum_mbus_code(struct v4l2_subdev *sd, 721 struct v4l2_subdev_state *sd_state, 722 struct v4l2_subdev_mbus_code_enum *code) 723{ 724 if (code->index >= MAX_FMTS) 725 return -EINVAL; 726 727 code->code = MEDIA_BUS_FMT_SBGGR10_1X10; 728 return 0; 729} 730 731static int gc2235_enum_frame_size(struct v4l2_subdev *sd, 732 struct v4l2_subdev_state *sd_state, 733 struct v4l2_subdev_frame_size_enum *fse) 734{ 735 int index = fse->index; 736 737 if (index >= N_RES) 738 return -EINVAL; 739 740 fse->min_width = gc2235_res[index].width; 741 fse->min_height = gc2235_res[index].height; 742 fse->max_width = gc2235_res[index].width; 743 fse->max_height = gc2235_res[index].height; 744 745 return 0; 746} 747 748static int gc2235_g_skip_frames(struct v4l2_subdev *sd, u32 *frames) 749{ 750 struct gc2235_device *dev = to_gc2235_sensor(sd); 751 752 mutex_lock(&dev->input_lock); 753 *frames = dev->res->skip_frames; 754 mutex_unlock(&dev->input_lock); 755 756 return 0; 757} 758 759static const struct v4l2_subdev_sensor_ops gc2235_sensor_ops = { 760 .g_skip_frames = gc2235_g_skip_frames, 761}; 762 763static const struct v4l2_subdev_video_ops gc2235_video_ops = { 764 .s_stream = gc2235_s_stream, 765}; 766 767static const struct v4l2_subdev_core_ops gc2235_core_ops = { 768 .s_power = gc2235_s_power, 769 .ioctl = gc2235_ioctl, 770}; 771 772static const struct v4l2_subdev_pad_ops gc2235_pad_ops = { 773 .enum_mbus_code = gc2235_enum_mbus_code, 774 .enum_frame_size = gc2235_enum_frame_size, 775 .get_fmt = gc2235_get_fmt, 776 .set_fmt = gc2235_set_fmt, 777 .get_frame_interval = gc2235_get_frame_interval, 778}; 779 780static const struct v4l2_subdev_ops gc2235_ops = { 781 .core = &gc2235_core_ops, 782 .video = &gc2235_video_ops, 783 .pad = &gc2235_pad_ops, 784 .sensor = &gc2235_sensor_ops, 785}; 786 787static void gc2235_remove(struct i2c_client *client) 788{ 789 struct v4l2_subdev *sd = i2c_get_clientdata(client); 790 struct gc2235_device *dev = to_gc2235_sensor(sd); 791 792 dev_dbg(&client->dev, "gc2235_remove...\n"); 793 794 dev->platform_data->csi_cfg(sd, 0); 795 796 v4l2_device_unregister_subdev(sd); 797 media_entity_cleanup(&dev->sd.entity); 798 v4l2_ctrl_handler_free(&dev->ctrl_handler); 799 kfree(dev); 800} 801 802static int gc2235_probe(struct i2c_client *client) 803{ 804 struct gc2235_device *dev; 805 void *gcpdev; 806 int ret; 807 unsigned int i; 808 809 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 810 if (!dev) 811 return -ENOMEM; 812 813 mutex_init(&dev->input_lock); 814 815 dev->res = &gc2235_res_preview[0]; 816 v4l2_i2c_subdev_init(&dev->sd, client, &gc2235_ops); 817 818 gcpdev = gmin_camera_platform_data(&dev->sd, 819 ATOMISP_INPUT_FORMAT_RAW_10, 820 atomisp_bayer_order_grbg); 821 822 ret = gc2235_s_config(&dev->sd, client->irq, gcpdev); 823 if (ret) 824 goto out_free; 825 826 dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 827 dev->pad.flags = MEDIA_PAD_FL_SOURCE; 828 dev->format.code = MEDIA_BUS_FMT_SBGGR10_1X10; 829 dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 830 ret = 831 v4l2_ctrl_handler_init(&dev->ctrl_handler, 832 ARRAY_SIZE(gc2235_controls)); 833 if (ret) { 834 gc2235_remove(client); 835 return ret; 836 } 837 838 for (i = 0; i < ARRAY_SIZE(gc2235_controls); i++) 839 v4l2_ctrl_new_custom(&dev->ctrl_handler, &gc2235_controls[i], 840 NULL); 841 842 if (dev->ctrl_handler.error) { 843 gc2235_remove(client); 844 return dev->ctrl_handler.error; 845 } 846 847 /* Use same lock for controls as for everything else. */ 848 dev->ctrl_handler.lock = &dev->input_lock; 849 dev->sd.ctrl_handler = &dev->ctrl_handler; 850 851 ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad); 852 if (ret) 853 gc2235_remove(client); 854 855 return atomisp_register_i2c_module(&dev->sd, gcpdev, RAW_CAMERA); 856 857out_free: 858 v4l2_device_unregister_subdev(&dev->sd); 859 kfree(dev); 860 861 return ret; 862} 863 864static const struct acpi_device_id gc2235_acpi_match[] = { 865 { "INT33F8" }, 866 {}, 867}; 868MODULE_DEVICE_TABLE(acpi, gc2235_acpi_match); 869 870static struct i2c_driver gc2235_driver = { 871 .driver = { 872 .name = "gc2235", 873 .acpi_match_table = gc2235_acpi_match, 874 }, 875 .probe = gc2235_probe, 876 .remove = gc2235_remove, 877}; 878module_i2c_driver(gc2235_driver); 879 880MODULE_AUTHOR("Shuguang Gong <Shuguang.Gong@intel.com>"); 881MODULE_DESCRIPTION("A low-level driver for GC2235 sensors"); 882MODULE_LICENSE("GPL"); 883