This source file includes following definitions.
- mlx90640_nvram_read
- amg88xx_xfer
- mlx90640_xfer
- amg88xx_setup
- mlx90640_setup
- amg88xx_set_power_on
- amg88xx_set_power_off
- amg88xx_set_power
- amg88xx_is_visible
- amg88xx_read
- amg88xx_hwmon_init
- queue_setup
- buffer_prepare
- buffer_queue
- video_i2c_thread_vid_cap
- video_i2c_del_list
- start_streaming
- stop_streaming
- video_i2c_querycap
- video_i2c_g_input
- video_i2c_s_input
- video_i2c_enum_input
- video_i2c_enum_fmt_vid_cap
- video_i2c_enum_framesizes
- video_i2c_enum_frameintervals
- video_i2c_try_fmt_vid_cap
- video_i2c_s_fmt_vid_cap
- video_i2c_g_parm
- video_i2c_s_parm
- video_i2c_release
- video_i2c_probe
- video_i2c_remove
- video_i2c_pm_runtime_suspend
- video_i2c_pm_runtime_resume
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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
37 struct video_i2c_chip;
38
39 struct video_i2c_buffer {
40 struct vb2_v4l2_buffer vb;
41 struct list_head list;
42 };
43
44 struct 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
62 static const struct v4l2_fmtdesc amg88xx_format = {
63 .pixelformat = V4L2_PIX_FMT_Y12,
64 };
65
66 static const struct v4l2_frmsize_discrete amg88xx_size = {
67 .width = 8,
68 .height = 8,
69 };
70
71 static const struct v4l2_fmtdesc mlx90640_format = {
72 .pixelformat = V4L2_PIX_FMT_Y16_BE,
73 };
74
75 static const struct v4l2_frmsize_discrete mlx90640_size = {
76 .width = 32,
77 .height = 26,
78 };
79
80 static const struct regmap_config amg88xx_regmap_config = {
81 .reg_bits = 8,
82 .val_bits = 8,
83 .max_register = 0xff
84 };
85
86 static const struct regmap_config mlx90640_regmap_config = {
87 .reg_bits = 16,
88 .val_bits = 16,
89 };
90
91 struct video_i2c_chip {
92
93 const struct v4l2_fmtdesc *format;
94 const struct v4l2_frmsize_discrete *size;
95
96
97 const struct v4l2_fract *frame_intervals;
98 unsigned int num_frame_intervals;
99
100
101 unsigned int buffer_size;
102
103
104 unsigned int bpp;
105
106 const struct regmap_config *regmap_config;
107 struct nvmem_config *nvmem_config;
108
109
110 int (*setup)(struct video_i2c_data *data);
111
112
113 int (*xfer)(struct video_i2c_data *data, char *buf);
114
115
116 int (*set_power)(struct video_i2c_data *data, bool on);
117
118
119 int (*hwmon_init)(struct video_i2c_data *data);
120 };
121
122 static 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
130 static 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
139 #define AMG88XX_REG_PCTL 0x00
140 #define AMG88XX_PCTL_NORMAL 0x00
141 #define AMG88XX_PCTL_SLEEP 0x10
142
143
144 #define AMG88XX_REG_RST 0x01
145 #define AMG88XX_RST_FLAG 0x30
146 #define AMG88XX_RST_INIT 0x3f
147
148
149 #define AMG88XX_REG_FPSC 0x02
150 #define AMG88XX_FPSC_1FPS BIT(0)
151
152
153 #define AMG88XX_REG_TTHL 0x0e
154
155
156 #define AMG88XX_REG_T01L 0x80
157
158
159 #define MLX90640_REG_CTL1 0x800d
160 #define MLX90640_REG_CTL1_MASK 0x0380
161 #define MLX90640_REG_CTL1_MASK_SHIFT 7
162
163 static 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
169 static 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
175 static 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
188 static 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
205 static 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
227
228 msleep(200);
229
230 return 0;
231 }
232
233 static 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
242
243
244
245 msleep(100);
246
247 return 0;
248 }
249
250 static 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
260 static const u32 amg88xx_temp_config[] = {
261 HWMON_T_INPUT,
262 0
263 };
264
265 static const struct hwmon_channel_info amg88xx_temp = {
266 .type = hwmon_temp,
267 .config = amg88xx_temp_config,
268 };
269
270 static const struct hwmon_channel_info *amg88xx_info[] = {
271 &amg88xx_temp,
272 NULL
273 };
274
275 static 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
282 static 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
305
306
307
308 if (tmp & BIT(11))
309 tmp = -(tmp & 0x7ff);
310
311 *val = (tmp * 625) / 10;
312
313 return 0;
314 }
315
316 static const struct hwmon_ops amg88xx_hwmon_ops = {
317 .is_visible = amg88xx_is_visible,
318 .read = amg88xx_read,
319 };
320
321 static const struct hwmon_chip_info amg88xx_chip_info = {
322 .ops = &amg88xx_hwmon_ops,
323 .info = amg88xx_info,
324 };
325
326 static 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
338 enum {
339 AMG88XX,
340 MLX90640,
341 };
342
343 static const struct v4l2_fract amg88xx_frame_intervals[] = {
344 { 1, 10 },
345 { 1, 1 },
346 };
347
348 static 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
359 static 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
387 static 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
397 static 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
416 static 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
431 static 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
443 static 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
491 static 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
506 static 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
532 error_rpm_put:
533 pm_runtime_mark_last_busy(dev);
534 pm_runtime_put_autosuspend(dev);
535 error_del_list:
536 video_i2c_del_list(vq, VB2_BUF_STATE_QUEUED);
537
538 return ret;
539 }
540
541 static 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
556 static 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
566 static 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
581 static int video_i2c_g_input(struct file *file, void *fh, unsigned int *inp)
582 {
583 *inp = 0;
584
585 return 0;
586 }
587
588 static int video_i2c_s_input(struct file *file, void *fh, unsigned int inp)
589 {
590 return (inp > 0) ? -EINVAL : 0;
591 }
592
593 static 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
606 static 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
621 static 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
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
641 static 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
659 static 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
678 static 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
689 static 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
704 static 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
720 static 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
743 static 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
754 static 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_GRABBER, -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
870 error_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
878 error_unregister_device:
879 v4l2_device_unregister(v4l2_dev);
880 mutex_destroy(&data->lock);
881 mutex_destroy(&data->queue_lock);
882
883 error_regmap_exit:
884 regmap_exit(data->regmap);
885
886 error_free_device:
887 kfree(data);
888
889 return ret;
890 }
891
892 static 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
911 static 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
921 static 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
933 static 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
938 static const struct i2c_device_id video_i2c_id_table[] = {
939 { "amg88xx", AMG88XX },
940 { "mlx90640", MLX90640 },
941 {}
942 };
943 MODULE_DEVICE_TABLE(i2c, video_i2c_id_table);
944
945 static 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 };
950 MODULE_DEVICE_TABLE(of, video_i2c_of_match);
951
952 static 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
963 module_i2c_driver(video_i2c_driver);
964
965 MODULE_AUTHOR("Matt Ranostay <matt.ranostay@konsulko.com>");
966 MODULE_DESCRIPTION("I2C transport video support");
967 MODULE_LICENSE("GPL v2");