| 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 | */ |
| 10 | |
| 11 | #include <linux/delay.h> |
| 12 | #include <linux/freezer.h> |
| 13 | #include <linux/hwmon.h> |
| 14 | #include <linux/kthread.h> |
| 15 | #include <linux/i2c.h> |
| 16 | #include <linux/list.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/mutex.h> |
| 19 | #include <linux/of_device.h> |
| 20 | #include <linux/regmap.h> |
| 21 | #include <linux/sched.h> |
| 22 | #include <linux/slab.h> |
| 23 | #include <linux/videodev2.h> |
| 24 | #include <media/v4l2-common.h> |
| 25 | #include <media/v4l2-device.h> |
| 26 | #include <media/v4l2-event.h> |
| 27 | #include <media/v4l2-fh.h> |
| 28 | #include <media/v4l2-ioctl.h> |
| 29 | #include <media/videobuf2-v4l2.h> |
| 30 | #include <media/videobuf2-vmalloc.h> |
| 31 | |
| 32 | #define VIDEO_I2C_DRIVER "video-i2c" |
| 33 | |
| 34 | struct video_i2c_chip; |
| 35 | |
| 36 | struct video_i2c_buffer { |
| 37 | struct vb2_v4l2_buffer vb; |
| 38 | struct list_head list; |
| 39 | }; |
| 40 | |
| 41 | struct video_i2c_data { |
| 42 | struct regmap *regmap; |
| 43 | const struct video_i2c_chip *chip; |
| 44 | struct mutex lock; |
| 45 | spinlock_t slock; |
| 46 | unsigned int sequence; |
| 47 | struct mutex queue_lock; |
| 48 | |
| 49 | struct v4l2_device v4l2_dev; |
| 50 | struct video_device vdev; |
| 51 | struct vb2_queue vb_vidq; |
| 52 | |
| 53 | struct task_struct *kthread_vid_cap; |
| 54 | struct list_head vid_cap_active; |
| 55 | |
| 56 | struct v4l2_fract frame_interval; |
| 57 | }; |
| 58 | |
| 59 | static const struct v4l2_fmtdesc amg88xx_format = { |
| 60 | .pixelformat = V4L2_PIX_FMT_Y12, |
| 61 | }; |
| 62 | |
| 63 | static const struct v4l2_frmsize_discrete amg88xx_size = { |
| 64 | .width = 8, |
| 65 | .height = 8, |
| 66 | }; |
| 67 | |
| 68 | static const struct regmap_config amg88xx_regmap_config = { |
| 69 | .reg_bits = 8, |
| 70 | .val_bits = 8, |
| 71 | .max_register = 0xff |
| 72 | }; |
| 73 | |
| 74 | struct video_i2c_chip { |
| 75 | /* video dimensions */ |
| 76 | const struct v4l2_fmtdesc *format; |
| 77 | const struct v4l2_frmsize_discrete *size; |
| 78 | |
| 79 | /* available frame intervals */ |
| 80 | const struct v4l2_fract *frame_intervals; |
| 81 | unsigned int num_frame_intervals; |
| 82 | |
| 83 | /* pixel buffer size */ |
| 84 | unsigned int buffer_size; |
| 85 | |
| 86 | /* pixel size in bits */ |
| 87 | unsigned int bpp; |
| 88 | |
| 89 | const struct regmap_config *regmap_config; |
| 90 | |
| 91 | /* setup function */ |
| 92 | int (*setup)(struct video_i2c_data *data); |
| 93 | |
| 94 | /* xfer function */ |
| 95 | int (*xfer)(struct video_i2c_data *data, char *buf); |
| 96 | |
| 97 | /* hwmon init function */ |
| 98 | int (*hwmon_init)(struct video_i2c_data *data); |
| 99 | }; |
| 100 | |
| 101 | /* Frame rate register */ |
| 102 | #define AMG88XX_REG_FPSC 0x02 |
| 103 | #define AMG88XX_FPSC_1FPS BIT(0) |
| 104 | |
| 105 | /* Thermistor register */ |
| 106 | #define AMG88XX_REG_TTHL 0x0e |
| 107 | |
| 108 | /* Temperature register */ |
| 109 | #define AMG88XX_REG_T01L 0x80 |
| 110 | |
| 111 | static int amg88xx_xfer(struct video_i2c_data *data, char *buf) |
| 112 | { |
| 113 | return regmap_bulk_read(data->regmap, AMG88XX_REG_T01L, buf, |
| 114 | data->chip->buffer_size); |
| 115 | } |
| 116 | |
| 117 | static int amg88xx_setup(struct video_i2c_data *data) |
| 118 | { |
| 119 | unsigned int mask = AMG88XX_FPSC_1FPS; |
| 120 | unsigned int val; |
| 121 | |
| 122 | if (data->frame_interval.numerator == data->frame_interval.denominator) |
| 123 | val = mask; |
| 124 | else |
| 125 | val = 0; |
| 126 | |
| 127 | return regmap_update_bits(data->regmap, AMG88XX_REG_FPSC, mask, val); |
| 128 | } |
| 129 | |
| 130 | #if IS_ENABLED(CONFIG_HWMON) |
| 131 | |
| 132 | static const u32 amg88xx_temp_config[] = { |
| 133 | HWMON_T_INPUT, |
| 134 | 0 |
| 135 | }; |
| 136 | |
| 137 | static const struct hwmon_channel_info amg88xx_temp = { |
| 138 | .type = hwmon_temp, |
| 139 | .config = amg88xx_temp_config, |
| 140 | }; |
| 141 | |
| 142 | static const struct hwmon_channel_info *amg88xx_info[] = { |
| 143 | &amg88xx_temp, |
| 144 | NULL |
| 145 | }; |
| 146 | |
| 147 | static umode_t amg88xx_is_visible(const void *drvdata, |
| 148 | enum hwmon_sensor_types type, |
| 149 | u32 attr, int channel) |
| 150 | { |
| 151 | return 0444; |
| 152 | } |
| 153 | |
| 154 | static int amg88xx_read(struct device *dev, enum hwmon_sensor_types type, |
| 155 | u32 attr, int channel, long *val) |
| 156 | { |
| 157 | struct video_i2c_data *data = dev_get_drvdata(dev); |
| 158 | __le16 buf; |
| 159 | int tmp; |
| 160 | |
| 161 | tmp = regmap_bulk_read(data->regmap, AMG88XX_REG_TTHL, &buf, 2); |
| 162 | if (tmp) |
| 163 | return tmp; |
| 164 | |
| 165 | tmp = le16_to_cpu(buf); |
| 166 | |
| 167 | /* |
| 168 | * Check for sign bit, this isn't a two's complement value but an |
| 169 | * absolute temperature that needs to be inverted in the case of being |
| 170 | * negative. |
| 171 | */ |
| 172 | if (tmp & BIT(11)) |
| 173 | tmp = -(tmp & 0x7ff); |
| 174 | |
| 175 | *val = (tmp * 625) / 10; |
| 176 | |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | static const struct hwmon_ops amg88xx_hwmon_ops = { |
| 181 | .is_visible = amg88xx_is_visible, |
| 182 | .read = amg88xx_read, |
| 183 | }; |
| 184 | |
| 185 | static const struct hwmon_chip_info amg88xx_chip_info = { |
| 186 | .ops = &amg88xx_hwmon_ops, |
| 187 | .info = amg88xx_info, |
| 188 | }; |
| 189 | |
| 190 | static int amg88xx_hwmon_init(struct video_i2c_data *data) |
| 191 | { |
| 192 | struct device *dev = regmap_get_device(data->regmap); |
| 193 | void *hwmon = devm_hwmon_device_register_with_info(dev, "amg88xx", data, |
| 194 | &amg88xx_chip_info, NULL); |
| 195 | |
| 196 | return PTR_ERR_OR_ZERO(hwmon); |
| 197 | } |
| 198 | #else |
| 199 | #define amg88xx_hwmon_init NULL |
| 200 | #endif |
| 201 | |
| 202 | #define AMG88XX 0 |
| 203 | |
| 204 | static const struct v4l2_fract amg88xx_frame_intervals[] = { |
| 205 | { 1, 10 }, |
| 206 | { 1, 1 }, |
| 207 | }; |
| 208 | |
| 209 | static const struct video_i2c_chip video_i2c_chip[] = { |
| 210 | [AMG88XX] = { |
| 211 | .size = &amg88xx_size, |
| 212 | .format = &amg88xx_format, |
| 213 | .frame_intervals = amg88xx_frame_intervals, |
| 214 | .num_frame_intervals = ARRAY_SIZE(amg88xx_frame_intervals), |
| 215 | .buffer_size = 128, |
| 216 | .bpp = 16, |
| 217 | .regmap_config = &amg88xx_regmap_config, |
| 218 | .setup = &amg88xx_setup, |
| 219 | .xfer = &amg88xx_xfer, |
| 220 | .hwmon_init = amg88xx_hwmon_init, |
| 221 | }, |
| 222 | }; |
| 223 | |
| 224 | static const struct v4l2_file_operations video_i2c_fops = { |
| 225 | .owner = THIS_MODULE, |
| 226 | .open = v4l2_fh_open, |
| 227 | .release = vb2_fop_release, |
| 228 | .poll = vb2_fop_poll, |
| 229 | .read = vb2_fop_read, |
| 230 | .mmap = vb2_fop_mmap, |
| 231 | .unlocked_ioctl = video_ioctl2, |
| 232 | }; |
| 233 | |
| 234 | static int queue_setup(struct vb2_queue *vq, |
| 235 | unsigned int *nbuffers, unsigned int *nplanes, |
| 236 | unsigned int sizes[], struct device *alloc_devs[]) |
| 237 | { |
| 238 | struct video_i2c_data *data = vb2_get_drv_priv(vq); |
| 239 | unsigned int size = data->chip->buffer_size; |
| 240 | |
| 241 | if (vq->num_buffers + *nbuffers < 2) |
| 242 | *nbuffers = 2; |
| 243 | |
| 244 | if (*nplanes) |
| 245 | return sizes[0] < size ? -EINVAL : 0; |
| 246 | |
| 247 | *nplanes = 1; |
| 248 | sizes[0] = size; |
| 249 | |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | static int buffer_prepare(struct vb2_buffer *vb) |
| 254 | { |
| 255 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| 256 | struct video_i2c_data *data = vb2_get_drv_priv(vb->vb2_queue); |
| 257 | unsigned int size = data->chip->buffer_size; |
| 258 | |
| 259 | if (vb2_plane_size(vb, 0) < size) |
| 260 | return -EINVAL; |
| 261 | |
| 262 | vbuf->field = V4L2_FIELD_NONE; |
| 263 | vb2_set_plane_payload(vb, 0, size); |
| 264 | |
| 265 | return 0; |
| 266 | } |
| 267 | |
| 268 | static void buffer_queue(struct vb2_buffer *vb) |
| 269 | { |
| 270 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| 271 | struct video_i2c_data *data = vb2_get_drv_priv(vb->vb2_queue); |
| 272 | struct video_i2c_buffer *buf = |
| 273 | container_of(vbuf, struct video_i2c_buffer, vb); |
| 274 | |
| 275 | spin_lock(&data->slock); |
| 276 | list_add_tail(&buf->list, &data->vid_cap_active); |
| 277 | spin_unlock(&data->slock); |
| 278 | } |
| 279 | |
| 280 | static int video_i2c_thread_vid_cap(void *priv) |
| 281 | { |
| 282 | struct video_i2c_data *data = priv; |
| 283 | unsigned int delay = mult_frac(HZ, data->frame_interval.numerator, |
| 284 | data->frame_interval.denominator); |
| 285 | |
| 286 | set_freezable(); |
| 287 | |
| 288 | do { |
| 289 | unsigned long start_jiffies = jiffies; |
| 290 | struct video_i2c_buffer *vid_cap_buf = NULL; |
| 291 | int schedule_delay; |
| 292 | |
| 293 | try_to_freeze(); |
| 294 | |
| 295 | spin_lock(&data->slock); |
| 296 | |
| 297 | if (!list_empty(&data->vid_cap_active)) { |
| 298 | vid_cap_buf = list_last_entry(&data->vid_cap_active, |
| 299 | struct video_i2c_buffer, list); |
| 300 | list_del(&vid_cap_buf->list); |
| 301 | } |
| 302 | |
| 303 | spin_unlock(&data->slock); |
| 304 | |
| 305 | if (vid_cap_buf) { |
| 306 | struct vb2_buffer *vb2_buf = &vid_cap_buf->vb.vb2_buf; |
| 307 | void *vbuf = vb2_plane_vaddr(vb2_buf, 0); |
| 308 | int ret; |
| 309 | |
| 310 | ret = data->chip->xfer(data, vbuf); |
| 311 | vb2_buf->timestamp = ktime_get_ns(); |
| 312 | vid_cap_buf->vb.sequence = data->sequence++; |
| 313 | vb2_buffer_done(vb2_buf, ret ? |
| 314 | VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); |
| 315 | } |
| 316 | |
| 317 | schedule_delay = delay - (jiffies - start_jiffies); |
| 318 | |
| 319 | if (time_after(jiffies, start_jiffies + delay)) |
| 320 | schedule_delay = delay; |
| 321 | |
| 322 | schedule_timeout_interruptible(schedule_delay); |
| 323 | } while (!kthread_should_stop()); |
| 324 | |
| 325 | return 0; |
| 326 | } |
| 327 | |
| 328 | static void video_i2c_del_list(struct vb2_queue *vq, enum vb2_buffer_state state) |
| 329 | { |
| 330 | struct video_i2c_data *data = vb2_get_drv_priv(vq); |
| 331 | struct video_i2c_buffer *buf, *tmp; |
| 332 | |
| 333 | spin_lock(&data->slock); |
| 334 | |
| 335 | list_for_each_entry_safe(buf, tmp, &data->vid_cap_active, list) { |
| 336 | list_del(&buf->list); |
| 337 | vb2_buffer_done(&buf->vb.vb2_buf, state); |
| 338 | } |
| 339 | |
| 340 | spin_unlock(&data->slock); |
| 341 | } |
| 342 | |
| 343 | static int start_streaming(struct vb2_queue *vq, unsigned int count) |
| 344 | { |
| 345 | struct video_i2c_data *data = vb2_get_drv_priv(vq); |
| 346 | int ret; |
| 347 | |
| 348 | if (data->kthread_vid_cap) |
| 349 | return 0; |
| 350 | |
| 351 | ret = data->chip->setup(data); |
| 352 | if (ret) |
| 353 | goto error_del_list; |
| 354 | |
| 355 | data->sequence = 0; |
| 356 | data->kthread_vid_cap = kthread_run(video_i2c_thread_vid_cap, data, |
| 357 | "%s-vid-cap", data->v4l2_dev.name); |
| 358 | ret = PTR_ERR_OR_ZERO(data->kthread_vid_cap); |
| 359 | if (!ret) |
| 360 | return 0; |
| 361 | |
| 362 | error_del_list: |
| 363 | video_i2c_del_list(vq, VB2_BUF_STATE_QUEUED); |
| 364 | |
| 365 | return ret; |
| 366 | } |
| 367 | |
| 368 | static void stop_streaming(struct vb2_queue *vq) |
| 369 | { |
| 370 | struct video_i2c_data *data = vb2_get_drv_priv(vq); |
| 371 | |
| 372 | if (data->kthread_vid_cap == NULL) |
| 373 | return; |
| 374 | |
| 375 | kthread_stop(data->kthread_vid_cap); |
| 376 | data->kthread_vid_cap = NULL; |
| 377 | |
| 378 | video_i2c_del_list(vq, VB2_BUF_STATE_ERROR); |
| 379 | } |
| 380 | |
| 381 | static const struct vb2_ops video_i2c_video_qops = { |
| 382 | .queue_setup = queue_setup, |
| 383 | .buf_prepare = buffer_prepare, |
| 384 | .buf_queue = buffer_queue, |
| 385 | .start_streaming = start_streaming, |
| 386 | .stop_streaming = stop_streaming, |
| 387 | .wait_prepare = vb2_ops_wait_prepare, |
| 388 | .wait_finish = vb2_ops_wait_finish, |
| 389 | }; |
| 390 | |
| 391 | static int video_i2c_querycap(struct file *file, void *priv, |
| 392 | struct v4l2_capability *vcap) |
| 393 | { |
| 394 | struct video_i2c_data *data = video_drvdata(file); |
| 395 | struct device *dev = regmap_get_device(data->regmap); |
| 396 | struct i2c_client *client = to_i2c_client(dev); |
| 397 | |
| 398 | strscpy(vcap->driver, data->v4l2_dev.name, sizeof(vcap->driver)); |
| 399 | strscpy(vcap->card, data->vdev.name, sizeof(vcap->card)); |
| 400 | |
| 401 | sprintf(vcap->bus_info, "I2C:%d-%d", client->adapter->nr, client->addr); |
| 402 | |
| 403 | return 0; |
| 404 | } |
| 405 | |
| 406 | static int video_i2c_g_input(struct file *file, void *fh, unsigned int *inp) |
| 407 | { |
| 408 | *inp = 0; |
| 409 | |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | static int video_i2c_s_input(struct file *file, void *fh, unsigned int inp) |
| 414 | { |
| 415 | return (inp > 0) ? -EINVAL : 0; |
| 416 | } |
| 417 | |
| 418 | static int video_i2c_enum_input(struct file *file, void *fh, |
| 419 | struct v4l2_input *vin) |
| 420 | { |
| 421 | if (vin->index > 0) |
| 422 | return -EINVAL; |
| 423 | |
| 424 | strscpy(vin->name, "Camera", sizeof(vin->name)); |
| 425 | |
| 426 | vin->type = V4L2_INPUT_TYPE_CAMERA; |
| 427 | |
| 428 | return 0; |
| 429 | } |
| 430 | |
| 431 | static int video_i2c_enum_fmt_vid_cap(struct file *file, void *fh, |
| 432 | struct v4l2_fmtdesc *fmt) |
| 433 | { |
| 434 | struct video_i2c_data *data = video_drvdata(file); |
| 435 | enum v4l2_buf_type type = fmt->type; |
| 436 | |
| 437 | if (fmt->index > 0) |
| 438 | return -EINVAL; |
| 439 | |
| 440 | *fmt = *data->chip->format; |
| 441 | fmt->type = type; |
| 442 | |
| 443 | return 0; |
| 444 | } |
| 445 | |
| 446 | static int video_i2c_enum_framesizes(struct file *file, void *fh, |
| 447 | struct v4l2_frmsizeenum *fsize) |
| 448 | { |
| 449 | const struct video_i2c_data *data = video_drvdata(file); |
| 450 | const struct v4l2_frmsize_discrete *size = data->chip->size; |
| 451 | |
| 452 | /* currently only one frame size is allowed */ |
| 453 | if (fsize->index > 0) |
| 454 | return -EINVAL; |
| 455 | |
| 456 | if (fsize->pixel_format != data->chip->format->pixelformat) |
| 457 | return -EINVAL; |
| 458 | |
| 459 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; |
| 460 | fsize->discrete.width = size->width; |
| 461 | fsize->discrete.height = size->height; |
| 462 | |
| 463 | return 0; |
| 464 | } |
| 465 | |
| 466 | static int video_i2c_enum_frameintervals(struct file *file, void *priv, |
| 467 | struct v4l2_frmivalenum *fe) |
| 468 | { |
| 469 | const struct video_i2c_data *data = video_drvdata(file); |
| 470 | const struct v4l2_frmsize_discrete *size = data->chip->size; |
| 471 | |
| 472 | if (fe->index >= data->chip->num_frame_intervals) |
| 473 | return -EINVAL; |
| 474 | |
| 475 | if (fe->width != size->width || fe->height != size->height) |
| 476 | return -EINVAL; |
| 477 | |
| 478 | fe->type = V4L2_FRMIVAL_TYPE_DISCRETE; |
| 479 | fe->discrete = data->chip->frame_intervals[fe->index]; |
| 480 | |
| 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | static int video_i2c_try_fmt_vid_cap(struct file *file, void *fh, |
| 485 | struct v4l2_format *fmt) |
| 486 | { |
| 487 | const struct video_i2c_data *data = video_drvdata(file); |
| 488 | const struct v4l2_frmsize_discrete *size = data->chip->size; |
| 489 | struct v4l2_pix_format *pix = &fmt->fmt.pix; |
| 490 | unsigned int bpp = data->chip->bpp / 8; |
| 491 | |
| 492 | pix->width = size->width; |
| 493 | pix->height = size->height; |
| 494 | pix->pixelformat = data->chip->format->pixelformat; |
| 495 | pix->field = V4L2_FIELD_NONE; |
| 496 | pix->bytesperline = pix->width * bpp; |
| 497 | pix->sizeimage = pix->bytesperline * pix->height; |
| 498 | pix->colorspace = V4L2_COLORSPACE_RAW; |
| 499 | |
| 500 | return 0; |
| 501 | } |
| 502 | |
| 503 | static int video_i2c_s_fmt_vid_cap(struct file *file, void *fh, |
| 504 | struct v4l2_format *fmt) |
| 505 | { |
| 506 | struct video_i2c_data *data = video_drvdata(file); |
| 507 | |
| 508 | if (vb2_is_busy(&data->vb_vidq)) |
| 509 | return -EBUSY; |
| 510 | |
| 511 | return video_i2c_try_fmt_vid_cap(file, fh, fmt); |
| 512 | } |
| 513 | |
| 514 | static int video_i2c_g_parm(struct file *filp, void *priv, |
| 515 | struct v4l2_streamparm *parm) |
| 516 | { |
| 517 | struct video_i2c_data *data = video_drvdata(filp); |
| 518 | |
| 519 | if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 520 | return -EINVAL; |
| 521 | |
| 522 | parm->parm.capture.readbuffers = 1; |
| 523 | parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; |
| 524 | parm->parm.capture.timeperframe = data->frame_interval; |
| 525 | |
| 526 | return 0; |
| 527 | } |
| 528 | |
| 529 | static int video_i2c_s_parm(struct file *filp, void *priv, |
| 530 | struct v4l2_streamparm *parm) |
| 531 | { |
| 532 | struct video_i2c_data *data = video_drvdata(filp); |
| 533 | int i; |
| 534 | |
| 535 | for (i = 0; i < data->chip->num_frame_intervals - 1; i++) { |
| 536 | if (V4L2_FRACT_COMPARE(parm->parm.capture.timeperframe, <=, |
| 537 | data->chip->frame_intervals[i])) |
| 538 | break; |
| 539 | } |
| 540 | data->frame_interval = data->chip->frame_intervals[i]; |
| 541 | |
| 542 | return video_i2c_g_parm(filp, priv, parm); |
| 543 | } |
| 544 | |
| 545 | static const struct v4l2_ioctl_ops video_i2c_ioctl_ops = { |
| 546 | .vidioc_querycap = video_i2c_querycap, |
| 547 | .vidioc_g_input = video_i2c_g_input, |
| 548 | .vidioc_s_input = video_i2c_s_input, |
| 549 | .vidioc_enum_input = video_i2c_enum_input, |
| 550 | .vidioc_enum_fmt_vid_cap = video_i2c_enum_fmt_vid_cap, |
| 551 | .vidioc_enum_framesizes = video_i2c_enum_framesizes, |
| 552 | .vidioc_enum_frameintervals = video_i2c_enum_frameintervals, |
| 553 | .vidioc_g_fmt_vid_cap = video_i2c_try_fmt_vid_cap, |
| 554 | .vidioc_s_fmt_vid_cap = video_i2c_s_fmt_vid_cap, |
| 555 | .vidioc_g_parm = video_i2c_g_parm, |
| 556 | .vidioc_s_parm = video_i2c_s_parm, |
| 557 | .vidioc_try_fmt_vid_cap = video_i2c_try_fmt_vid_cap, |
| 558 | .vidioc_reqbufs = vb2_ioctl_reqbufs, |
| 559 | .vidioc_create_bufs = vb2_ioctl_create_bufs, |
| 560 | .vidioc_prepare_buf = vb2_ioctl_prepare_buf, |
| 561 | .vidioc_querybuf = vb2_ioctl_querybuf, |
| 562 | .vidioc_qbuf = vb2_ioctl_qbuf, |
| 563 | .vidioc_dqbuf = vb2_ioctl_dqbuf, |
| 564 | .vidioc_streamon = vb2_ioctl_streamon, |
| 565 | .vidioc_streamoff = vb2_ioctl_streamoff, |
| 566 | }; |
| 567 | |
| 568 | static void video_i2c_release(struct video_device *vdev) |
| 569 | { |
| 570 | struct video_i2c_data *data = video_get_drvdata(vdev); |
| 571 | |
| 572 | v4l2_device_unregister(&data->v4l2_dev); |
| 573 | mutex_destroy(&data->lock); |
| 574 | mutex_destroy(&data->queue_lock); |
| 575 | regmap_exit(data->regmap); |
| 576 | kfree(data); |
| 577 | } |
| 578 | |
| 579 | static int video_i2c_probe(struct i2c_client *client, |
| 580 | const struct i2c_device_id *id) |
| 581 | { |
| 582 | struct video_i2c_data *data; |
| 583 | struct v4l2_device *v4l2_dev; |
| 584 | struct vb2_queue *queue; |
| 585 | int ret = -ENODEV; |
| 586 | |
| 587 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 588 | if (!data) |
| 589 | return -ENOMEM; |
| 590 | |
| 591 | if (dev_fwnode(&client->dev)) |
| 592 | data->chip = device_get_match_data(&client->dev); |
| 593 | else if (id) |
| 594 | data->chip = &video_i2c_chip[id->driver_data]; |
| 595 | else |
| 596 | goto error_free_device; |
| 597 | |
| 598 | data->regmap = regmap_init_i2c(client, data->chip->regmap_config); |
| 599 | if (IS_ERR(data->regmap)) { |
| 600 | ret = PTR_ERR(data->regmap); |
| 601 | goto error_free_device; |
| 602 | } |
| 603 | |
| 604 | v4l2_dev = &data->v4l2_dev; |
| 605 | strscpy(v4l2_dev->name, VIDEO_I2C_DRIVER, sizeof(v4l2_dev->name)); |
| 606 | |
| 607 | ret = v4l2_device_register(&client->dev, v4l2_dev); |
| 608 | if (ret < 0) |
| 609 | goto error_regmap_exit; |
| 610 | |
| 611 | mutex_init(&data->lock); |
| 612 | mutex_init(&data->queue_lock); |
| 613 | |
| 614 | queue = &data->vb_vidq; |
| 615 | queue->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 616 | queue->io_modes = VB2_DMABUF | VB2_MMAP | VB2_USERPTR | VB2_READ; |
| 617 | queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
| 618 | queue->drv_priv = data; |
| 619 | queue->buf_struct_size = sizeof(struct video_i2c_buffer); |
| 620 | queue->min_buffers_needed = 1; |
| 621 | queue->ops = &video_i2c_video_qops; |
| 622 | queue->mem_ops = &vb2_vmalloc_memops; |
| 623 | |
| 624 | ret = vb2_queue_init(queue); |
| 625 | if (ret < 0) |
| 626 | goto error_unregister_device; |
| 627 | |
| 628 | data->vdev.queue = queue; |
| 629 | data->vdev.queue->lock = &data->queue_lock; |
| 630 | |
| 631 | snprintf(data->vdev.name, sizeof(data->vdev.name), |
| 632 | "I2C %d-%d Transport Video", |
| 633 | client->adapter->nr, client->addr); |
| 634 | |
| 635 | data->vdev.v4l2_dev = v4l2_dev; |
| 636 | data->vdev.fops = &video_i2c_fops; |
| 637 | data->vdev.lock = &data->lock; |
| 638 | data->vdev.ioctl_ops = &video_i2c_ioctl_ops; |
| 639 | data->vdev.release = video_i2c_release; |
| 640 | data->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | |
| 641 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; |
| 642 | |
| 643 | spin_lock_init(&data->slock); |
| 644 | INIT_LIST_HEAD(&data->vid_cap_active); |
| 645 | |
| 646 | data->frame_interval = data->chip->frame_intervals[0]; |
| 647 | |
| 648 | video_set_drvdata(&data->vdev, data); |
| 649 | i2c_set_clientdata(client, data); |
| 650 | |
| 651 | if (data->chip->hwmon_init) { |
| 652 | ret = data->chip->hwmon_init(data); |
| 653 | if (ret < 0) { |
| 654 | dev_warn(&client->dev, |
| 655 | "failed to register hwmon device\n"); |
| 656 | } |
| 657 | } |
| 658 | |
| 659 | ret = video_register_device(&data->vdev, VFL_TYPE_GRABBER, -1); |
| 660 | if (ret < 0) |
| 661 | goto error_unregister_device; |
| 662 | |
| 663 | return 0; |
| 664 | |
| 665 | error_unregister_device: |
| 666 | v4l2_device_unregister(v4l2_dev); |
| 667 | mutex_destroy(&data->lock); |
| 668 | mutex_destroy(&data->queue_lock); |
| 669 | |
| 670 | error_regmap_exit: |
| 671 | regmap_exit(data->regmap); |
| 672 | |
| 673 | error_free_device: |
| 674 | kfree(data); |
| 675 | |
| 676 | return ret; |
| 677 | } |
| 678 | |
| 679 | static int video_i2c_remove(struct i2c_client *client) |
| 680 | { |
| 681 | struct video_i2c_data *data = i2c_get_clientdata(client); |
| 682 | |
| 683 | video_unregister_device(&data->vdev); |
| 684 | |
| 685 | return 0; |
| 686 | } |
| 687 | |
| 688 | static const struct i2c_device_id video_i2c_id_table[] = { |
| 689 | { "amg88xx", AMG88XX }, |
| 690 | {} |
| 691 | }; |
| 692 | MODULE_DEVICE_TABLE(i2c, video_i2c_id_table); |
| 693 | |
| 694 | static const struct of_device_id video_i2c_of_match[] = { |
| 695 | { .compatible = "panasonic,amg88xx", .data = &video_i2c_chip[AMG88XX] }, |
| 696 | {} |
| 697 | }; |
| 698 | MODULE_DEVICE_TABLE(of, video_i2c_of_match); |
| 699 | |
| 700 | static struct i2c_driver video_i2c_driver = { |
| 701 | .driver = { |
| 702 | .name = VIDEO_I2C_DRIVER, |
| 703 | .of_match_table = video_i2c_of_match, |
| 704 | }, |
| 705 | .probe = video_i2c_probe, |
| 706 | .remove = video_i2c_remove, |
| 707 | .id_table = video_i2c_id_table, |
| 708 | }; |
| 709 | |
| 710 | module_i2c_driver(video_i2c_driver); |
| 711 | |
| 712 | MODULE_AUTHOR("Matt Ranostay <matt.ranostay@konsulko.com>"); |
| 713 | MODULE_DESCRIPTION("I2C transport video support"); |
| 714 | MODULE_LICENSE("GPL v2"); |