1// SPDX-License-Identifier: GPL-2.0 2/* 3 * video-i2c.c - Support for I2C transport video devices 4 * 5 * Copyright (C) 2018 Matt Ranostay <matt.ranostay@konsulko.com> 6 * 7 * Supported: 8 * - Panasonic AMG88xx Grid-Eye Sensors 9 * - Melexis MLX90640 Thermal Cameras 10 */ 11 12#include <linux/delay.h> 13#include <linux/freezer.h> 14#include <linux/hwmon.h> 15#include <linux/kthread.h> 16#include <linux/i2c.h> 17#include <linux/list.h> 18#include <linux/module.h> 19#include <linux/mutex.h> 20#include <linux/of_device.h> 21#include <linux/pm_runtime.h> 22#include <linux/nvmem-provider.h> 23#include <linux/regmap.h> 24#include <linux/sched.h> 25#include <linux/slab.h> 26#include <linux/videodev2.h> 27#include <media/v4l2-common.h> 28#include <media/v4l2-device.h> 29#include <media/v4l2-event.h> 30#include <media/v4l2-fh.h> 31#include <media/v4l2-ioctl.h> 32#include <media/videobuf2-v4l2.h> 33#include <media/videobuf2-vmalloc.h> 34 35#define VIDEO_I2C_DRIVER "video-i2c" 36 37struct video_i2c_chip; 38 39struct video_i2c_buffer { 40 struct vb2_v4l2_buffer vb; 41 struct list_head list; 42}; 43 44struct video_i2c_data { 45 struct regmap *regmap; 46 const struct video_i2c_chip *chip; 47 struct mutex lock; 48 spinlock_t slock; 49 unsigned int sequence; 50 struct mutex queue_lock; 51 52 struct v4l2_device v4l2_dev; 53 struct video_device vdev; 54 struct vb2_queue vb_vidq; 55 56 struct task_struct *kthread_vid_cap; 57 struct list_head vid_cap_active; 58 59 struct v4l2_fract frame_interval; 60}; 61 62static const struct v4l2_fmtdesc amg88xx_format = { 63 .pixelformat = V4L2_PIX_FMT_Y12, 64}; 65 66static const struct v4l2_frmsize_discrete amg88xx_size = { 67 .width = 8, 68 .height = 8, 69}; 70 71static const struct v4l2_fmtdesc mlx90640_format = { 72 .pixelformat = V4L2_PIX_FMT_Y16_BE, 73}; 74 75static const struct v4l2_frmsize_discrete mlx90640_size = { 76 .width = 32, 77 .height = 26, /* 24 lines of pixel data + 2 lines of processing data */ 78}; 79 80static const struct regmap_config amg88xx_regmap_config = { 81 .reg_bits = 8, 82 .val_bits = 8, 83 .max_register = 0xff 84}; 85 86static const struct regmap_config mlx90640_regmap_config = { 87 .reg_bits = 16, 88 .val_bits = 16, 89}; 90 91struct video_i2c_chip { 92 /* video dimensions */ 93 const struct v4l2_fmtdesc *format; 94 const struct v4l2_frmsize_discrete *size; 95 96 /* available frame intervals */ 97 const struct v4l2_fract *frame_intervals; 98 unsigned int num_frame_intervals; 99 100 /* pixel buffer size */ 101 unsigned int buffer_size; 102 103 /* pixel size in bits */ 104 unsigned int bpp; 105 106 const struct regmap_config *regmap_config; 107 struct nvmem_config *nvmem_config; 108 109 /* setup function */ 110 int (*setup)(struct video_i2c_data *data); 111 112 /* xfer function */ 113 int (*xfer)(struct video_i2c_data *data, char *buf); 114 115 /* power control function */ 116 int (*set_power)(struct video_i2c_data *data, bool on); 117 118 /* hwmon init function */ 119 int (*hwmon_init)(struct video_i2c_data *data); 120}; 121 122static int mlx90640_nvram_read(void *priv, unsigned int offset, void *val, 123 size_t bytes) 124{ 125 struct video_i2c_data *data = priv; 126 127 return regmap_bulk_read(data->regmap, 0x2400 + offset, val, bytes); 128} 129 130static struct nvmem_config mlx90640_nvram_config = { 131 .name = "mlx90640_nvram", 132 .word_size = 2, 133 .stride = 1, 134 .size = 1664, 135 .reg_read = mlx90640_nvram_read, 136}; 137 138/* Power control register */ 139#define AMG88XX_REG_PCTL 0x00 140#define AMG88XX_PCTL_NORMAL 0x00 141#define AMG88XX_PCTL_SLEEP 0x10 142 143/* Reset register */ 144#define AMG88XX_REG_RST 0x01 145#define AMG88XX_RST_FLAG 0x30 146#define AMG88XX_RST_INIT 0x3f 147 148/* Frame rate register */ 149#define AMG88XX_REG_FPSC 0x02 150#define AMG88XX_FPSC_1FPS BIT(0) 151 152/* Thermistor register */ 153#define AMG88XX_REG_TTHL 0x0e 154 155/* Temperature register */ 156#define AMG88XX_REG_T01L 0x80 157 158/* Control register */ 159#define MLX90640_REG_CTL1 0x800d 160#define MLX90640_REG_CTL1_MASK 0x0380 161#define MLX90640_REG_CTL1_MASK_SHIFT 7 162 163static int amg88xx_xfer(struct video_i2c_data *data, char *buf) 164{ 165 return regmap_bulk_read(data->regmap, AMG88XX_REG_T01L, buf, 166 data->chip->buffer_size); 167} 168 169static int mlx90640_xfer(struct video_i2c_data *data, char *buf) 170{ 171 return regmap_bulk_read(data->regmap, 0x400, buf, 172 data->chip->buffer_size); 173} 174 175static int amg88xx_setup(struct video_i2c_data *data) 176{ 177 unsigned int mask = AMG88XX_FPSC_1FPS; 178 unsigned int val; 179 180 if (data->frame_interval.numerator == data->frame_interval.denominator) 181 val = mask; 182 else 183 val = 0; 184 185 return regmap_update_bits(data->regmap, AMG88XX_REG_FPSC, mask, val); 186} 187 188static int mlx90640_setup(struct video_i2c_data *data) 189{ 190 unsigned int n, idx; 191 192 for (n = 0; n < data->chip->num_frame_intervals - 1; n++) { 193 if (V4L2_FRACT_COMPARE(data->frame_interval, ==, 194 data->chip->frame_intervals[n])) 195 break; 196 } 197 198 idx = data->chip->num_frame_intervals - n - 1; 199 200 return regmap_update_bits(data->regmap, MLX90640_REG_CTL1, 201 MLX90640_REG_CTL1_MASK, 202 idx << MLX90640_REG_CTL1_MASK_SHIFT); 203} 204 205static int amg88xx_set_power_on(struct video_i2c_data *data) 206{ 207 int ret; 208 209 ret = regmap_write(data->regmap, AMG88XX_REG_PCTL, AMG88XX_PCTL_NORMAL); 210 if (ret) 211 return ret; 212 213 msleep(50); 214 215 ret = regmap_write(data->regmap, AMG88XX_REG_RST, AMG88XX_RST_INIT); 216 if (ret) 217 return ret; 218 219 usleep_range(2000, 3000); 220 221 ret = regmap_write(data->regmap, AMG88XX_REG_RST, AMG88XX_RST_FLAG); 222 if (ret) 223 return ret; 224 225 /* 226 * Wait two frames before reading thermistor and temperature registers 227 */ 228 msleep(200); 229 230 return 0; 231} 232 233static int amg88xx_set_power_off(struct video_i2c_data *data) 234{ 235 int ret; 236 237 ret = regmap_write(data->regmap, AMG88XX_REG_PCTL, AMG88XX_PCTL_SLEEP); 238 if (ret) 239 return ret; 240 /* 241 * Wait for a while to avoid resuming normal mode immediately after 242 * entering sleep mode, otherwise the device occasionally goes wrong 243 * (thermistor and temperature registers are not updated at all) 244 */ 245 msleep(100); 246 247 return 0; 248} 249 250static int amg88xx_set_power(struct video_i2c_data *data, bool on) 251{ 252 if (on) 253 return amg88xx_set_power_on(data); 254 255 return amg88xx_set_power_off(data); 256} 257 258#if IS_REACHABLE(CONFIG_HWMON) 259 260static const u32 amg88xx_temp_config[] = { 261 HWMON_T_INPUT, 262 0 263}; 264 265static const struct hwmon_channel_info amg88xx_temp = { 266 .type = hwmon_temp, 267 .config = amg88xx_temp_config, 268}; 269 270static const struct hwmon_channel_info *amg88xx_info[] = { 271 &amg88xx_temp, 272 NULL 273}; 274 275static umode_t amg88xx_is_visible(const void *drvdata, 276 enum hwmon_sensor_types type, 277 u32 attr, int channel) 278{ 279 return 0444; 280} 281 282static int amg88xx_read(struct device *dev, enum hwmon_sensor_types type, 283 u32 attr, int channel, long *val) 284{ 285 struct video_i2c_data *data = dev_get_drvdata(dev); 286 __le16 buf; 287 int tmp; 288 289 tmp = pm_runtime_get_sync(regmap_get_device(data->regmap)); 290 if (tmp < 0) { 291 pm_runtime_put_noidle(regmap_get_device(data->regmap)); 292 return tmp; 293 } 294 295 tmp = regmap_bulk_read(data->regmap, AMG88XX_REG_TTHL, &buf, 2); 296 pm_runtime_mark_last_busy(regmap_get_device(data->regmap)); 297 pm_runtime_put_autosuspend(regmap_get_device(data->regmap)); 298 if (tmp) 299 return tmp; 300 301 tmp = le16_to_cpu(buf); 302 303 /* 304 * Check for sign bit, this isn't a two's complement value but an 305 * absolute temperature that needs to be inverted in the case of being 306 * negative. 307 */ 308 if (tmp & BIT(11)) 309 tmp = -(tmp & 0x7ff); 310 311 *val = (tmp * 625) / 10; 312 313 return 0; 314} 315 316static const struct hwmon_ops amg88xx_hwmon_ops = { 317 .is_visible = amg88xx_is_visible, 318 .read = amg88xx_read, 319}; 320 321static const struct hwmon_chip_info amg88xx_chip_info = { 322 .ops = &amg88xx_hwmon_ops, 323 .info = amg88xx_info, 324}; 325 326static int amg88xx_hwmon_init(struct video_i2c_data *data) 327{ 328 struct device *dev = regmap_get_device(data->regmap); 329 void *hwmon = devm_hwmon_device_register_with_info(dev, "amg88xx", data, 330 &amg88xx_chip_info, NULL); 331 332 return PTR_ERR_OR_ZERO(hwmon); 333} 334#else 335#define amg88xx_hwmon_init NULL 336#endif 337 338enum { 339 AMG88XX, 340 MLX90640, 341}; 342 343static const struct v4l2_fract amg88xx_frame_intervals[] = { 344 { 1, 10 }, 345 { 1, 1 }, 346}; 347 348static const struct v4l2_fract mlx90640_frame_intervals[] = { 349 { 1, 64 }, 350 { 1, 32 }, 351 { 1, 16 }, 352 { 1, 8 }, 353 { 1, 4 }, 354 { 1, 2 }, 355 { 1, 1 }, 356 { 2, 1 }, 357}; 358 359static const struct video_i2c_chip video_i2c_chip[] = { 360 [AMG88XX] = { 361 .size = &amg88xx_size, 362 .format = &amg88xx_format, 363 .frame_intervals = amg88xx_frame_intervals, 364 .num_frame_intervals = ARRAY_SIZE(amg88xx_frame_intervals), 365 .buffer_size = 128, 366 .bpp = 16, 367 .regmap_config = &amg88xx_regmap_config, 368 .setup = &amg88xx_setup, 369 .xfer = &amg88xx_xfer, 370 .set_power = amg88xx_set_power, 371 .hwmon_init = amg88xx_hwmon_init, 372 }, 373 [MLX90640] = { 374 .size = &mlx90640_size, 375 .format = &mlx90640_format, 376 .frame_intervals = mlx90640_frame_intervals, 377 .num_frame_intervals = ARRAY_SIZE(mlx90640_frame_intervals), 378 .buffer_size = 1664, 379 .bpp = 16, 380 .regmap_config = &mlx90640_regmap_config, 381 .nvmem_config = &mlx90640_nvram_config, 382 .setup = mlx90640_setup, 383 .xfer = mlx90640_xfer, 384 }, 385}; 386 387static const struct v4l2_file_operations video_i2c_fops = { 388 .owner = THIS_MODULE, 389 .open = v4l2_fh_open, 390 .release = vb2_fop_release, 391 .poll = vb2_fop_poll, 392 .read = vb2_fop_read, 393 .mmap = vb2_fop_mmap, 394 .unlocked_ioctl = video_ioctl2, 395}; 396 397static int queue_setup(struct vb2_queue *vq, 398 unsigned int *nbuffers, unsigned int *nplanes, 399 unsigned int sizes[], struct device *alloc_devs[]) 400{ 401 struct video_i2c_data *data = vb2_get_drv_priv(vq); 402 unsigned int size = data->chip->buffer_size; 403 404 if (vq->num_buffers + *nbuffers < 2) 405 *nbuffers = 2; 406 407 if (*nplanes) 408 return sizes[0] < size ? -EINVAL : 0; 409 410 *nplanes = 1; 411 sizes[0] = size; 412 413 return 0; 414} 415 416static int buffer_prepare(struct vb2_buffer *vb) 417{ 418 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 419 struct video_i2c_data *data = vb2_get_drv_priv(vb->vb2_queue); 420 unsigned int size = data->chip->buffer_size; 421 422 if (vb2_plane_size(vb, 0) < size) 423 return -EINVAL; 424 425 vbuf->field = V4L2_FIELD_NONE; 426 vb2_set_plane_payload(vb, 0, size); 427 428 return 0; 429} 430 431static void buffer_queue(struct vb2_buffer *vb) 432{ 433 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 434 struct video_i2c_data *data = vb2_get_drv_priv(vb->vb2_queue); 435 struct video_i2c_buffer *buf = 436 container_of(vbuf, struct video_i2c_buffer, vb); 437 438 spin_lock(&data->slock); 439 list_add_tail(&buf->list, &data->vid_cap_active); 440 spin_unlock(&data->slock); 441} 442 443static int video_i2c_thread_vid_cap(void *priv) 444{ 445 struct video_i2c_data *data = priv; 446 unsigned int delay = mult_frac(HZ, data->frame_interval.numerator, 447 data->frame_interval.denominator); 448 449 set_freezable(); 450 451 do { 452 unsigned long start_jiffies = jiffies; 453 struct video_i2c_buffer *vid_cap_buf = NULL; 454 int schedule_delay; 455 456 try_to_freeze(); 457 458 spin_lock(&data->slock); 459 460 if (!list_empty(&data->vid_cap_active)) { 461 vid_cap_buf = list_last_entry(&data->vid_cap_active, 462 struct video_i2c_buffer, list); 463 list_del(&vid_cap_buf->list); 464 } 465 466 spin_unlock(&data->slock); 467 468 if (vid_cap_buf) { 469 struct vb2_buffer *vb2_buf = &vid_cap_buf->vb.vb2_buf; 470 void *vbuf = vb2_plane_vaddr(vb2_buf, 0); 471 int ret; 472 473 ret = data->chip->xfer(data, vbuf); 474 vb2_buf->timestamp = ktime_get_ns(); 475 vid_cap_buf->vb.sequence = data->sequence++; 476 vb2_buffer_done(vb2_buf, ret ? 477 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); 478 } 479 480 schedule_delay = delay - (jiffies - start_jiffies); 481 482 if (time_after(jiffies, start_jiffies + delay)) 483 schedule_delay = delay; 484 485 schedule_timeout_interruptible(schedule_delay); 486 } while (!kthread_should_stop()); 487 488 return 0; 489} 490 491static void video_i2c_del_list(struct vb2_queue *vq, enum vb2_buffer_state state) 492{ 493 struct video_i2c_data *data = vb2_get_drv_priv(vq); 494 struct video_i2c_buffer *buf, *tmp; 495 496 spin_lock(&data->slock); 497 498 list_for_each_entry_safe(buf, tmp, &data->vid_cap_active, list) { 499 list_del(&buf->list); 500 vb2_buffer_done(&buf->vb.vb2_buf, state); 501 } 502 503 spin_unlock(&data->slock); 504} 505 506static int start_streaming(struct vb2_queue *vq, unsigned int count) 507{ 508 struct video_i2c_data *data = vb2_get_drv_priv(vq); 509 struct device *dev = regmap_get_device(data->regmap); 510 int ret; 511 512 if (data->kthread_vid_cap) 513 return 0; 514 515 ret = pm_runtime_get_sync(dev); 516 if (ret < 0) { 517 pm_runtime_put_noidle(dev); 518 goto error_del_list; 519 } 520 521 ret = data->chip->setup(data); 522 if (ret) 523 goto error_rpm_put; 524 525 data->sequence = 0; 526 data->kthread_vid_cap = kthread_run(video_i2c_thread_vid_cap, data, 527 "%s-vid-cap", data->v4l2_dev.name); 528 ret = PTR_ERR_OR_ZERO(data->kthread_vid_cap); 529 if (!ret) 530 return 0; 531 532error_rpm_put: 533 pm_runtime_mark_last_busy(dev); 534 pm_runtime_put_autosuspend(dev); 535error_del_list: 536 video_i2c_del_list(vq, VB2_BUF_STATE_QUEUED); 537 538 return ret; 539} 540 541static void stop_streaming(struct vb2_queue *vq) 542{ 543 struct video_i2c_data *data = vb2_get_drv_priv(vq); 544 545 if (data->kthread_vid_cap == NULL) 546 return; 547 548 kthread_stop(data->kthread_vid_cap); 549 data->kthread_vid_cap = NULL; 550 pm_runtime_mark_last_busy(regmap_get_device(data->regmap)); 551 pm_runtime_put_autosuspend(regmap_get_device(data->regmap)); 552 553 video_i2c_del_list(vq, VB2_BUF_STATE_ERROR); 554} 555 556static const struct vb2_ops video_i2c_video_qops = { 557 .queue_setup = queue_setup, 558 .buf_prepare = buffer_prepare, 559 .buf_queue = buffer_queue, 560 .start_streaming = start_streaming, 561 .stop_streaming = stop_streaming, 562 .wait_prepare = vb2_ops_wait_prepare, 563 .wait_finish = vb2_ops_wait_finish, 564}; 565 566static int video_i2c_querycap(struct file *file, void *priv, 567 struct v4l2_capability *vcap) 568{ 569 struct video_i2c_data *data = video_drvdata(file); 570 struct device *dev = regmap_get_device(data->regmap); 571 struct i2c_client *client = to_i2c_client(dev); 572 573 strscpy(vcap->driver, data->v4l2_dev.name, sizeof(vcap->driver)); 574 strscpy(vcap->card, data->vdev.name, sizeof(vcap->card)); 575 576 sprintf(vcap->bus_info, "I2C:%d-%d", client->adapter->nr, client->addr); 577 578 return 0; 579} 580 581static int video_i2c_g_input(struct file *file, void *fh, unsigned int *inp) 582{ 583 *inp = 0; 584 585 return 0; 586} 587 588static int video_i2c_s_input(struct file *file, void *fh, unsigned int inp) 589{ 590 return (inp > 0) ? -EINVAL : 0; 591} 592 593static int video_i2c_enum_input(struct file *file, void *fh, 594 struct v4l2_input *vin) 595{ 596 if (vin->index > 0) 597 return -EINVAL; 598 599 strscpy(vin->name, "Camera", sizeof(vin->name)); 600 601 vin->type = V4L2_INPUT_TYPE_CAMERA; 602 603 return 0; 604} 605 606static int video_i2c_enum_fmt_vid_cap(struct file *file, void *fh, 607 struct v4l2_fmtdesc *fmt) 608{ 609 struct video_i2c_data *data = video_drvdata(file); 610 enum v4l2_buf_type type = fmt->type; 611 612 if (fmt->index > 0) 613 return -EINVAL; 614 615 *fmt = *data->chip->format; 616 fmt->type = type; 617 618 return 0; 619} 620 621static int video_i2c_enum_framesizes(struct file *file, void *fh, 622 struct v4l2_frmsizeenum *fsize) 623{ 624 const struct video_i2c_data *data = video_drvdata(file); 625 const struct v4l2_frmsize_discrete *size = data->chip->size; 626 627 /* currently only one frame size is allowed */ 628 if (fsize->index > 0) 629 return -EINVAL; 630 631 if (fsize->pixel_format != data->chip->format->pixelformat) 632 return -EINVAL; 633 634 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 635 fsize->discrete.width = size->width; 636 fsize->discrete.height = size->height; 637 638 return 0; 639} 640 641static int video_i2c_enum_frameintervals(struct file *file, void *priv, 642 struct v4l2_frmivalenum *fe) 643{ 644 const struct video_i2c_data *data = video_drvdata(file); 645 const struct v4l2_frmsize_discrete *size = data->chip->size; 646 647 if (fe->index >= data->chip->num_frame_intervals) 648 return -EINVAL; 649 650 if (fe->width != size->width || fe->height != size->height) 651 return -EINVAL; 652 653 fe->type = V4L2_FRMIVAL_TYPE_DISCRETE; 654 fe->discrete = data->chip->frame_intervals[fe->index]; 655 656 return 0; 657} 658 659static int video_i2c_try_fmt_vid_cap(struct file *file, void *fh, 660 struct v4l2_format *fmt) 661{ 662 const struct video_i2c_data *data = video_drvdata(file); 663 const struct v4l2_frmsize_discrete *size = data->chip->size; 664 struct v4l2_pix_format *pix = &fmt->fmt.pix; 665 unsigned int bpp = data->chip->bpp / 8; 666 667 pix->width = size->width; 668 pix->height = size->height; 669 pix->pixelformat = data->chip->format->pixelformat; 670 pix->field = V4L2_FIELD_NONE; 671 pix->bytesperline = pix->width * bpp; 672 pix->sizeimage = pix->bytesperline * pix->height; 673 pix->colorspace = V4L2_COLORSPACE_RAW; 674 675 return 0; 676} 677 678static int video_i2c_s_fmt_vid_cap(struct file *file, void *fh, 679 struct v4l2_format *fmt) 680{ 681 struct video_i2c_data *data = video_drvdata(file); 682 683 if (vb2_is_busy(&data->vb_vidq)) 684 return -EBUSY; 685 686 return video_i2c_try_fmt_vid_cap(file, fh, fmt); 687} 688 689static int video_i2c_g_parm(struct file *filp, void *priv, 690 struct v4l2_streamparm *parm) 691{ 692 struct video_i2c_data *data = video_drvdata(filp); 693 694 if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 695 return -EINVAL; 696 697 parm->parm.capture.readbuffers = 1; 698 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 699 parm->parm.capture.timeperframe = data->frame_interval; 700 701 return 0; 702} 703 704static int video_i2c_s_parm(struct file *filp, void *priv, 705 struct v4l2_streamparm *parm) 706{ 707 struct video_i2c_data *data = video_drvdata(filp); 708 int i; 709 710 for (i = 0; i < data->chip->num_frame_intervals - 1; i++) { 711 if (V4L2_FRACT_COMPARE(parm->parm.capture.timeperframe, <=, 712 data->chip->frame_intervals[i])) 713 break; 714 } 715 data->frame_interval = data->chip->frame_intervals[i]; 716 717 return video_i2c_g_parm(filp, priv, parm); 718} 719 720static const struct v4l2_ioctl_ops video_i2c_ioctl_ops = { 721 .vidioc_querycap = video_i2c_querycap, 722 .vidioc_g_input = video_i2c_g_input, 723 .vidioc_s_input = video_i2c_s_input, 724 .vidioc_enum_input = video_i2c_enum_input, 725 .vidioc_enum_fmt_vid_cap = video_i2c_enum_fmt_vid_cap, 726 .vidioc_enum_framesizes = video_i2c_enum_framesizes, 727 .vidioc_enum_frameintervals = video_i2c_enum_frameintervals, 728 .vidioc_g_fmt_vid_cap = video_i2c_try_fmt_vid_cap, 729 .vidioc_s_fmt_vid_cap = video_i2c_s_fmt_vid_cap, 730 .vidioc_g_parm = video_i2c_g_parm, 731 .vidioc_s_parm = video_i2c_s_parm, 732 .vidioc_try_fmt_vid_cap = video_i2c_try_fmt_vid_cap, 733 .vidioc_reqbufs = vb2_ioctl_reqbufs, 734 .vidioc_create_bufs = vb2_ioctl_create_bufs, 735 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 736 .vidioc_querybuf = vb2_ioctl_querybuf, 737 .vidioc_qbuf = vb2_ioctl_qbuf, 738 .vidioc_dqbuf = vb2_ioctl_dqbuf, 739 .vidioc_streamon = vb2_ioctl_streamon, 740 .vidioc_streamoff = vb2_ioctl_streamoff, 741}; 742 743static void video_i2c_release(struct video_device *vdev) 744{ 745 struct video_i2c_data *data = video_get_drvdata(vdev); 746 747 v4l2_device_unregister(&data->v4l2_dev); 748 mutex_destroy(&data->lock); 749 mutex_destroy(&data->queue_lock); 750 regmap_exit(data->regmap); 751 kfree(data); 752} 753 754static int video_i2c_probe(struct i2c_client *client, 755 const struct i2c_device_id *id) 756{ 757 struct video_i2c_data *data; 758 struct v4l2_device *v4l2_dev; 759 struct vb2_queue *queue; 760 int ret = -ENODEV; 761 762 data = kzalloc(sizeof(*data), GFP_KERNEL); 763 if (!data) 764 return -ENOMEM; 765 766 if (dev_fwnode(&client->dev)) 767 data->chip = device_get_match_data(&client->dev); 768 else if (id) 769 data->chip = &video_i2c_chip[id->driver_data]; 770 else 771 goto error_free_device; 772 773 data->regmap = regmap_init_i2c(client, data->chip->regmap_config); 774 if (IS_ERR(data->regmap)) { 775 ret = PTR_ERR(data->regmap); 776 goto error_free_device; 777 } 778 779 v4l2_dev = &data->v4l2_dev; 780 strscpy(v4l2_dev->name, VIDEO_I2C_DRIVER, sizeof(v4l2_dev->name)); 781 782 ret = v4l2_device_register(&client->dev, v4l2_dev); 783 if (ret < 0) 784 goto error_regmap_exit; 785 786 mutex_init(&data->lock); 787 mutex_init(&data->queue_lock); 788 789 queue = &data->vb_vidq; 790 queue->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 791 queue->io_modes = VB2_DMABUF | VB2_MMAP | VB2_USERPTR | VB2_READ; 792 queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 793 queue->drv_priv = data; 794 queue->buf_struct_size = sizeof(struct video_i2c_buffer); 795 queue->min_buffers_needed = 1; 796 queue->ops = &video_i2c_video_qops; 797 queue->mem_ops = &vb2_vmalloc_memops; 798 799 ret = vb2_queue_init(queue); 800 if (ret < 0) 801 goto error_unregister_device; 802 803 data->vdev.queue = queue; 804 data->vdev.queue->lock = &data->queue_lock; 805 806 snprintf(data->vdev.name, sizeof(data->vdev.name), 807 "I2C %d-%d Transport Video", 808 client->adapter->nr, client->addr); 809 810 data->vdev.v4l2_dev = v4l2_dev; 811 data->vdev.fops = &video_i2c_fops; 812 data->vdev.lock = &data->lock; 813 data->vdev.ioctl_ops = &video_i2c_ioctl_ops; 814 data->vdev.release = video_i2c_release; 815 data->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | 816 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; 817 818 spin_lock_init(&data->slock); 819 INIT_LIST_HEAD(&data->vid_cap_active); 820 821 data->frame_interval = data->chip->frame_intervals[0]; 822 823 video_set_drvdata(&data->vdev, data); 824 i2c_set_clientdata(client, data); 825 826 if (data->chip->set_power) { 827 ret = data->chip->set_power(data, true); 828 if (ret) 829 goto error_unregister_device; 830 } 831 832 pm_runtime_get_noresume(&client->dev); 833 pm_runtime_set_active(&client->dev); 834 pm_runtime_enable(&client->dev); 835 pm_runtime_set_autosuspend_delay(&client->dev, 2000); 836 pm_runtime_use_autosuspend(&client->dev); 837 838 if (data->chip->hwmon_init) { 839 ret = data->chip->hwmon_init(data); 840 if (ret < 0) { 841 dev_warn(&client->dev, 842 "failed to register hwmon device\n"); 843 } 844 } 845 846 if (data->chip->nvmem_config) { 847 struct nvmem_config *config = data->chip->nvmem_config; 848 struct nvmem_device *device; 849 850 config->priv = data; 851 config->dev = &client->dev; 852 853 device = devm_nvmem_register(&client->dev, config); 854 855 if (IS_ERR(device)) { 856 dev_warn(&client->dev, 857 "failed to register nvmem device\n"); 858 } 859 } 860 861 ret = video_register_device(&data->vdev, VFL_TYPE_VIDEO, -1); 862 if (ret < 0) 863 goto error_pm_disable; 864 865 pm_runtime_mark_last_busy(&client->dev); 866 pm_runtime_put_autosuspend(&client->dev); 867 868 return 0; 869 870error_pm_disable: 871 pm_runtime_disable(&client->dev); 872 pm_runtime_set_suspended(&client->dev); 873 pm_runtime_put_noidle(&client->dev); 874 875 if (data->chip->set_power) 876 data->chip->set_power(data, false); 877 878error_unregister_device: 879 v4l2_device_unregister(v4l2_dev); 880 mutex_destroy(&data->lock); 881 mutex_destroy(&data->queue_lock); 882 883error_regmap_exit: 884 regmap_exit(data->regmap); 885 886error_free_device: 887 kfree(data); 888 889 return ret; 890} 891 892static int video_i2c_remove(struct i2c_client *client) 893{ 894 struct video_i2c_data *data = i2c_get_clientdata(client); 895 896 pm_runtime_get_sync(&client->dev); 897 pm_runtime_disable(&client->dev); 898 pm_runtime_set_suspended(&client->dev); 899 pm_runtime_put_noidle(&client->dev); 900 901 if (data->chip->set_power) 902 data->chip->set_power(data, false); 903 904 video_unregister_device(&data->vdev); 905 906 return 0; 907} 908 909#ifdef CONFIG_PM 910 911static int video_i2c_pm_runtime_suspend(struct device *dev) 912{ 913 struct video_i2c_data *data = i2c_get_clientdata(to_i2c_client(dev)); 914 915 if (!data->chip->set_power) 916 return 0; 917 918 return data->chip->set_power(data, false); 919} 920 921static int video_i2c_pm_runtime_resume(struct device *dev) 922{ 923 struct video_i2c_data *data = i2c_get_clientdata(to_i2c_client(dev)); 924 925 if (!data->chip->set_power) 926 return 0; 927 928 return data->chip->set_power(data, true); 929} 930 931#endif 932 933static const struct dev_pm_ops video_i2c_pm_ops = { 934 SET_RUNTIME_PM_OPS(video_i2c_pm_runtime_suspend, 935 video_i2c_pm_runtime_resume, NULL) 936}; 937 938static const struct i2c_device_id video_i2c_id_table[] = { 939 { "amg88xx", AMG88XX }, 940 { "mlx90640", MLX90640 }, 941 {} 942}; 943MODULE_DEVICE_TABLE(i2c, video_i2c_id_table); 944 945static const struct of_device_id video_i2c_of_match[] = { 946 { .compatible = "panasonic,amg88xx", .data = &video_i2c_chip[AMG88XX] }, 947 { .compatible = "melexis,mlx90640", .data = &video_i2c_chip[MLX90640] }, 948 {} 949}; 950MODULE_DEVICE_TABLE(of, video_i2c_of_match); 951 952static struct i2c_driver video_i2c_driver = { 953 .driver = { 954 .name = VIDEO_I2C_DRIVER, 955 .of_match_table = video_i2c_of_match, 956 .pm = &video_i2c_pm_ops, 957 }, 958 .probe = video_i2c_probe, 959 .remove = video_i2c_remove, 960 .id_table = video_i2c_id_table, 961}; 962 963module_i2c_driver(video_i2c_driver); 964 965MODULE_AUTHOR("Matt Ranostay <matt.ranostay@konsulko.com>"); 966MODULE_DESCRIPTION("I2C transport video support"); 967MODULE_LICENSE("GPL v2"); 968