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7
8#include <linux/clk.h>
9#include <linux/delay.h>
10#include <linux/gpio/consumer.h>
11#include <linux/i2c.h>
12#include <linux/log2.h>
13#include <linux/module.h>
14#include <linux/pm_runtime.h>
15#include <linux/slab.h>
16#include <linux/videodev2.h>
17
18#include <media/v4l2-ctrls.h>
19#include <media/v4l2-device.h>
20#include <media/v4l2-event.h>
21#include <media/v4l2-subdev.h>
22
23
24
25
26
27
28#define MT9M001_CHIP_VERSION 0x00
29#define MT9M001_ROW_START 0x01
30#define MT9M001_COLUMN_START 0x02
31#define MT9M001_WINDOW_HEIGHT 0x03
32#define MT9M001_WINDOW_WIDTH 0x04
33#define MT9M001_HORIZONTAL_BLANKING 0x05
34#define MT9M001_VERTICAL_BLANKING 0x06
35#define MT9M001_OUTPUT_CONTROL 0x07
36#define MT9M001_SHUTTER_WIDTH 0x09
37#define MT9M001_FRAME_RESTART 0x0b
38#define MT9M001_SHUTTER_DELAY 0x0c
39#define MT9M001_RESET 0x0d
40#define MT9M001_READ_OPTIONS1 0x1e
41#define MT9M001_READ_OPTIONS2 0x20
42#define MT9M001_GLOBAL_GAIN 0x35
43#define MT9M001_CHIP_ENABLE 0xF1
44
45#define MT9M001_MAX_WIDTH 1280
46#define MT9M001_MAX_HEIGHT 1024
47#define MT9M001_MIN_WIDTH 48
48#define MT9M001_MIN_HEIGHT 32
49#define MT9M001_COLUMN_SKIP 20
50#define MT9M001_ROW_SKIP 12
51#define MT9M001_DEFAULT_HBLANK 9
52#define MT9M001_DEFAULT_VBLANK 25
53
54
55struct mt9m001_datafmt {
56 u32 code;
57 enum v4l2_colorspace colorspace;
58};
59
60
61static const struct mt9m001_datafmt *mt9m001_find_datafmt(
62 u32 code, const struct mt9m001_datafmt *fmt,
63 int n)
64{
65 int i;
66 for (i = 0; i < n; i++)
67 if (fmt[i].code == code)
68 return fmt + i;
69
70 return NULL;
71}
72
73static const struct mt9m001_datafmt mt9m001_colour_fmts[] = {
74
75
76
77
78 {MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
79 {MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
80};
81
82static const struct mt9m001_datafmt mt9m001_monochrome_fmts[] = {
83
84 {MEDIA_BUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
85 {MEDIA_BUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
86};
87
88struct mt9m001 {
89 struct v4l2_subdev subdev;
90 struct v4l2_ctrl_handler hdl;
91 struct {
92
93 struct v4l2_ctrl *autoexposure;
94 struct v4l2_ctrl *exposure;
95 };
96 bool streaming;
97 struct mutex mutex;
98 struct v4l2_rect rect;
99 struct clk *clk;
100 struct gpio_desc *standby_gpio;
101 struct gpio_desc *reset_gpio;
102 const struct mt9m001_datafmt *fmt;
103 const struct mt9m001_datafmt *fmts;
104 int num_fmts;
105 unsigned int total_h;
106 unsigned short y_skip_top;
107 struct media_pad pad;
108};
109
110static struct mt9m001 *to_mt9m001(const struct i2c_client *client)
111{
112 return container_of(i2c_get_clientdata(client), struct mt9m001, subdev);
113}
114
115static int reg_read(struct i2c_client *client, const u8 reg)
116{
117 return i2c_smbus_read_word_swapped(client, reg);
118}
119
120static int reg_write(struct i2c_client *client, const u8 reg,
121 const u16 data)
122{
123 return i2c_smbus_write_word_swapped(client, reg, data);
124}
125
126static int reg_set(struct i2c_client *client, const u8 reg,
127 const u16 data)
128{
129 int ret;
130
131 ret = reg_read(client, reg);
132 if (ret < 0)
133 return ret;
134 return reg_write(client, reg, ret | data);
135}
136
137static int reg_clear(struct i2c_client *client, const u8 reg,
138 const u16 data)
139{
140 int ret;
141
142 ret = reg_read(client, reg);
143 if (ret < 0)
144 return ret;
145 return reg_write(client, reg, ret & ~data);
146}
147
148struct mt9m001_reg {
149 u8 reg;
150 u16 data;
151};
152
153static int multi_reg_write(struct i2c_client *client,
154 const struct mt9m001_reg *regs, int num)
155{
156 int i;
157
158 for (i = 0; i < num; i++) {
159 int ret = reg_write(client, regs[i].reg, regs[i].data);
160
161 if (ret)
162 return ret;
163 }
164
165 return 0;
166}
167
168static int mt9m001_init(struct i2c_client *client)
169{
170 static const struct mt9m001_reg init_regs[] = {
171
172
173
174
175 { MT9M001_RESET, 1 },
176 { MT9M001_RESET, 0 },
177
178 { MT9M001_OUTPUT_CONTROL, 0 }
179 };
180
181 dev_dbg(&client->dev, "%s\n", __func__);
182
183 return multi_reg_write(client, init_regs, ARRAY_SIZE(init_regs));
184}
185
186static int mt9m001_apply_selection(struct v4l2_subdev *sd)
187{
188 struct i2c_client *client = v4l2_get_subdevdata(sd);
189 struct mt9m001 *mt9m001 = to_mt9m001(client);
190 const struct mt9m001_reg regs[] = {
191
192 { MT9M001_HORIZONTAL_BLANKING, MT9M001_DEFAULT_HBLANK },
193 { MT9M001_VERTICAL_BLANKING, MT9M001_DEFAULT_VBLANK },
194
195
196
197
198 { MT9M001_COLUMN_START, mt9m001->rect.left },
199 { MT9M001_ROW_START, mt9m001->rect.top },
200 { MT9M001_WINDOW_WIDTH, mt9m001->rect.width - 1 },
201 { MT9M001_WINDOW_HEIGHT,
202 mt9m001->rect.height + mt9m001->y_skip_top - 1 },
203 };
204
205 return multi_reg_write(client, regs, ARRAY_SIZE(regs));
206}
207
208static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable)
209{
210 struct i2c_client *client = v4l2_get_subdevdata(sd);
211 struct mt9m001 *mt9m001 = to_mt9m001(client);
212 int ret = 0;
213
214 mutex_lock(&mt9m001->mutex);
215
216 if (mt9m001->streaming == enable)
217 goto done;
218
219 if (enable) {
220 ret = pm_runtime_resume_and_get(&client->dev);
221 if (ret < 0)
222 goto unlock;
223
224 ret = mt9m001_apply_selection(sd);
225 if (ret)
226 goto put_unlock;
227
228 ret = __v4l2_ctrl_handler_setup(&mt9m001->hdl);
229 if (ret)
230 goto put_unlock;
231
232
233 ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 2);
234 if (ret < 0)
235 goto put_unlock;
236 } else {
237
238 reg_write(client, MT9M001_OUTPUT_CONTROL, 0);
239 pm_runtime_put(&client->dev);
240 }
241
242 mt9m001->streaming = enable;
243done:
244 mutex_unlock(&mt9m001->mutex);
245
246 return 0;
247
248put_unlock:
249 pm_runtime_put(&client->dev);
250unlock:
251 mutex_unlock(&mt9m001->mutex);
252
253 return ret;
254}
255
256static int mt9m001_set_selection(struct v4l2_subdev *sd,
257 struct v4l2_subdev_state *sd_state,
258 struct v4l2_subdev_selection *sel)
259{
260 struct i2c_client *client = v4l2_get_subdevdata(sd);
261 struct mt9m001 *mt9m001 = to_mt9m001(client);
262 struct v4l2_rect rect = sel->r;
263
264 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
265 sel->target != V4L2_SEL_TGT_CROP)
266 return -EINVAL;
267
268 if (mt9m001->fmts == mt9m001_colour_fmts)
269
270
271
272
273 rect.height = ALIGN(rect.height, 2);
274
275
276 rect.width = ALIGN(rect.width, 2);
277 rect.left = ALIGN(rect.left, 2);
278
279 rect.width = clamp_t(u32, rect.width, MT9M001_MIN_WIDTH,
280 MT9M001_MAX_WIDTH);
281 rect.left = clamp_t(u32, rect.left, MT9M001_COLUMN_SKIP,
282 MT9M001_COLUMN_SKIP + MT9M001_MAX_WIDTH - rect.width);
283
284 rect.height = clamp_t(u32, rect.height, MT9M001_MIN_HEIGHT,
285 MT9M001_MAX_HEIGHT);
286 rect.top = clamp_t(u32, rect.top, MT9M001_ROW_SKIP,
287 MT9M001_ROW_SKIP + MT9M001_MAX_HEIGHT - rect.height);
288
289 mt9m001->total_h = rect.height + mt9m001->y_skip_top +
290 MT9M001_DEFAULT_VBLANK;
291
292 mt9m001->rect = rect;
293
294 return 0;
295}
296
297static int mt9m001_get_selection(struct v4l2_subdev *sd,
298 struct v4l2_subdev_state *sd_state,
299 struct v4l2_subdev_selection *sel)
300{
301 struct i2c_client *client = v4l2_get_subdevdata(sd);
302 struct mt9m001 *mt9m001 = to_mt9m001(client);
303
304 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
305 return -EINVAL;
306
307 switch (sel->target) {
308 case V4L2_SEL_TGT_CROP_BOUNDS:
309 sel->r.left = MT9M001_COLUMN_SKIP;
310 sel->r.top = MT9M001_ROW_SKIP;
311 sel->r.width = MT9M001_MAX_WIDTH;
312 sel->r.height = MT9M001_MAX_HEIGHT;
313 return 0;
314 case V4L2_SEL_TGT_CROP:
315 sel->r = mt9m001->rect;
316 return 0;
317 default:
318 return -EINVAL;
319 }
320}
321
322static int mt9m001_get_fmt(struct v4l2_subdev *sd,
323 struct v4l2_subdev_state *sd_state,
324 struct v4l2_subdev_format *format)
325{
326 struct i2c_client *client = v4l2_get_subdevdata(sd);
327 struct mt9m001 *mt9m001 = to_mt9m001(client);
328 struct v4l2_mbus_framefmt *mf = &format->format;
329
330 if (format->pad)
331 return -EINVAL;
332
333 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
334 mf = v4l2_subdev_get_try_format(sd, sd_state, 0);
335 format->format = *mf;
336 return 0;
337 }
338
339 mf->width = mt9m001->rect.width;
340 mf->height = mt9m001->rect.height;
341 mf->code = mt9m001->fmt->code;
342 mf->colorspace = mt9m001->fmt->colorspace;
343 mf->field = V4L2_FIELD_NONE;
344 mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
345 mf->quantization = V4L2_QUANTIZATION_DEFAULT;
346 mf->xfer_func = V4L2_XFER_FUNC_DEFAULT;
347
348 return 0;
349}
350
351static int mt9m001_s_fmt(struct v4l2_subdev *sd,
352 const struct mt9m001_datafmt *fmt,
353 struct v4l2_mbus_framefmt *mf)
354{
355 struct i2c_client *client = v4l2_get_subdevdata(sd);
356 struct mt9m001 *mt9m001 = to_mt9m001(client);
357 struct v4l2_subdev_selection sel = {
358 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
359 .target = V4L2_SEL_TGT_CROP,
360 .r.left = mt9m001->rect.left,
361 .r.top = mt9m001->rect.top,
362 .r.width = mf->width,
363 .r.height = mf->height,
364 };
365 int ret;
366
367
368 ret = mt9m001_set_selection(sd, NULL, &sel);
369 if (!ret) {
370 mf->width = mt9m001->rect.width;
371 mf->height = mt9m001->rect.height;
372 mt9m001->fmt = fmt;
373 mf->colorspace = fmt->colorspace;
374 }
375
376 return ret;
377}
378
379static int mt9m001_set_fmt(struct v4l2_subdev *sd,
380 struct v4l2_subdev_state *sd_state,
381 struct v4l2_subdev_format *format)
382{
383 struct v4l2_mbus_framefmt *mf = &format->format;
384 struct i2c_client *client = v4l2_get_subdevdata(sd);
385 struct mt9m001 *mt9m001 = to_mt9m001(client);
386 const struct mt9m001_datafmt *fmt;
387
388 if (format->pad)
389 return -EINVAL;
390
391 v4l_bound_align_image(&mf->width, MT9M001_MIN_WIDTH,
392 MT9M001_MAX_WIDTH, 1,
393 &mf->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top,
394 MT9M001_MAX_HEIGHT + mt9m001->y_skip_top, 0, 0);
395
396 if (mt9m001->fmts == mt9m001_colour_fmts)
397 mf->height = ALIGN(mf->height - 1, 2);
398
399 fmt = mt9m001_find_datafmt(mf->code, mt9m001->fmts,
400 mt9m001->num_fmts);
401 if (!fmt) {
402 fmt = mt9m001->fmt;
403 mf->code = fmt->code;
404 }
405
406 mf->colorspace = fmt->colorspace;
407 mf->field = V4L2_FIELD_NONE;
408 mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
409 mf->quantization = V4L2_QUANTIZATION_DEFAULT;
410 mf->xfer_func = V4L2_XFER_FUNC_DEFAULT;
411
412 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
413 return mt9m001_s_fmt(sd, fmt, mf);
414 sd_state->pads->try_fmt = *mf;
415 return 0;
416}
417
418#ifdef CONFIG_VIDEO_ADV_DEBUG
419static int mt9m001_g_register(struct v4l2_subdev *sd,
420 struct v4l2_dbg_register *reg)
421{
422 struct i2c_client *client = v4l2_get_subdevdata(sd);
423
424 if (reg->reg > 0xff)
425 return -EINVAL;
426
427 reg->size = 2;
428 reg->val = reg_read(client, reg->reg);
429
430 if (reg->val > 0xffff)
431 return -EIO;
432
433 return 0;
434}
435
436static int mt9m001_s_register(struct v4l2_subdev *sd,
437 const struct v4l2_dbg_register *reg)
438{
439 struct i2c_client *client = v4l2_get_subdevdata(sd);
440
441 if (reg->reg > 0xff)
442 return -EINVAL;
443
444 if (reg_write(client, reg->reg, reg->val) < 0)
445 return -EIO;
446
447 return 0;
448}
449#endif
450
451static int mt9m001_power_on(struct device *dev)
452{
453 struct i2c_client *client = to_i2c_client(dev);
454 struct mt9m001 *mt9m001 = to_mt9m001(client);
455 int ret;
456
457 ret = clk_prepare_enable(mt9m001->clk);
458 if (ret)
459 return ret;
460
461 if (mt9m001->standby_gpio) {
462 gpiod_set_value_cansleep(mt9m001->standby_gpio, 0);
463 usleep_range(1000, 2000);
464 }
465
466 if (mt9m001->reset_gpio) {
467 gpiod_set_value_cansleep(mt9m001->reset_gpio, 1);
468 usleep_range(1000, 2000);
469 gpiod_set_value_cansleep(mt9m001->reset_gpio, 0);
470 usleep_range(1000, 2000);
471 }
472
473 return 0;
474}
475
476static int mt9m001_power_off(struct device *dev)
477{
478 struct i2c_client *client = to_i2c_client(dev);
479 struct mt9m001 *mt9m001 = to_mt9m001(client);
480
481 gpiod_set_value_cansleep(mt9m001->standby_gpio, 1);
482 clk_disable_unprepare(mt9m001->clk);
483
484 return 0;
485}
486
487static int mt9m001_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
488{
489 struct mt9m001 *mt9m001 = container_of(ctrl->handler,
490 struct mt9m001, hdl);
491 s32 min, max;
492
493 switch (ctrl->id) {
494 case V4L2_CID_EXPOSURE_AUTO:
495 min = mt9m001->exposure->minimum;
496 max = mt9m001->exposure->maximum;
497 mt9m001->exposure->val =
498 (524 + (mt9m001->total_h - 1) * (max - min)) / 1048 + min;
499 break;
500 }
501 return 0;
502}
503
504static int mt9m001_s_ctrl(struct v4l2_ctrl *ctrl)
505{
506 struct mt9m001 *mt9m001 = container_of(ctrl->handler,
507 struct mt9m001, hdl);
508 struct v4l2_subdev *sd = &mt9m001->subdev;
509 struct i2c_client *client = v4l2_get_subdevdata(sd);
510 struct v4l2_ctrl *exp = mt9m001->exposure;
511 int data;
512 int ret;
513
514 if (!pm_runtime_get_if_in_use(&client->dev))
515 return 0;
516
517 switch (ctrl->id) {
518 case V4L2_CID_VFLIP:
519 if (ctrl->val)
520 ret = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000);
521 else
522 ret = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000);
523 break;
524
525 case V4L2_CID_GAIN:
526
527 if (ctrl->val <= ctrl->default_value) {
528
529 unsigned long range = ctrl->default_value - ctrl->minimum;
530 data = ((ctrl->val - (s32)ctrl->minimum) * 8 + range / 2) / range;
531
532 dev_dbg(&client->dev, "Setting gain %d\n", data);
533 ret = reg_write(client, MT9M001_GLOBAL_GAIN, data);
534 } else {
535
536
537 unsigned long range = ctrl->maximum - ctrl->default_value - 1;
538 unsigned long gain = ((ctrl->val - (s32)ctrl->default_value - 1) *
539 111 + range / 2) / range + 9;
540
541 if (gain <= 32)
542 data = gain;
543 else if (gain <= 64)
544 data = ((gain - 32) * 16 + 16) / 32 + 80;
545 else
546 data = ((gain - 64) * 7 + 28) / 56 + 96;
547
548 dev_dbg(&client->dev, "Setting gain from %d to %d\n",
549 reg_read(client, MT9M001_GLOBAL_GAIN), data);
550 ret = reg_write(client, MT9M001_GLOBAL_GAIN, data);
551 }
552 break;
553
554 case V4L2_CID_EXPOSURE_AUTO:
555 if (ctrl->val == V4L2_EXPOSURE_MANUAL) {
556 unsigned long range = exp->maximum - exp->minimum;
557 unsigned long shutter = ((exp->val - (s32)exp->minimum) * 1048 +
558 range / 2) / range + 1;
559
560 dev_dbg(&client->dev,
561 "Setting shutter width from %d to %lu\n",
562 reg_read(client, MT9M001_SHUTTER_WIDTH), shutter);
563 ret = reg_write(client, MT9M001_SHUTTER_WIDTH, shutter);
564 } else {
565 mt9m001->total_h = mt9m001->rect.height +
566 mt9m001->y_skip_top + MT9M001_DEFAULT_VBLANK;
567 ret = reg_write(client, MT9M001_SHUTTER_WIDTH,
568 mt9m001->total_h);
569 }
570 break;
571 default:
572 ret = -EINVAL;
573 break;
574 }
575
576 pm_runtime_put(&client->dev);
577
578 return ret;
579}
580
581
582
583
584
585static int mt9m001_video_probe(struct i2c_client *client)
586{
587 struct mt9m001 *mt9m001 = to_mt9m001(client);
588 s32 data;
589 int ret;
590
591
592 data = reg_write(client, MT9M001_CHIP_ENABLE, 1);
593 dev_dbg(&client->dev, "write: %d\n", data);
594
595
596 data = reg_read(client, MT9M001_CHIP_VERSION);
597
598
599 switch (data) {
600 case 0x8411:
601 case 0x8421:
602 mt9m001->fmts = mt9m001_colour_fmts;
603 mt9m001->num_fmts = ARRAY_SIZE(mt9m001_colour_fmts);
604 break;
605 case 0x8431:
606 mt9m001->fmts = mt9m001_monochrome_fmts;
607 mt9m001->num_fmts = ARRAY_SIZE(mt9m001_monochrome_fmts);
608 break;
609 default:
610 dev_err(&client->dev,
611 "No MT9M001 chip detected, register read %x\n", data);
612 ret = -ENODEV;
613 goto done;
614 }
615
616 mt9m001->fmt = &mt9m001->fmts[0];
617
618 dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
619 data == 0x8431 ? "C12STM" : "C12ST");
620
621 ret = mt9m001_init(client);
622 if (ret < 0) {
623 dev_err(&client->dev, "Failed to initialise the camera\n");
624 goto done;
625 }
626
627
628 ret = v4l2_ctrl_handler_setup(&mt9m001->hdl);
629
630done:
631 return ret;
632}
633
634static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
635{
636 struct i2c_client *client = v4l2_get_subdevdata(sd);
637 struct mt9m001 *mt9m001 = to_mt9m001(client);
638
639 *lines = mt9m001->y_skip_top;
640
641 return 0;
642}
643
644static const struct v4l2_ctrl_ops mt9m001_ctrl_ops = {
645 .g_volatile_ctrl = mt9m001_g_volatile_ctrl,
646 .s_ctrl = mt9m001_s_ctrl,
647};
648
649static const struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = {
650 .log_status = v4l2_ctrl_subdev_log_status,
651 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
652 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
653#ifdef CONFIG_VIDEO_ADV_DEBUG
654 .g_register = mt9m001_g_register,
655 .s_register = mt9m001_s_register,
656#endif
657};
658
659static int mt9m001_init_cfg(struct v4l2_subdev *sd,
660 struct v4l2_subdev_state *sd_state)
661{
662 struct i2c_client *client = v4l2_get_subdevdata(sd);
663 struct mt9m001 *mt9m001 = to_mt9m001(client);
664 struct v4l2_mbus_framefmt *try_fmt =
665 v4l2_subdev_get_try_format(sd, sd_state, 0);
666
667 try_fmt->width = MT9M001_MAX_WIDTH;
668 try_fmt->height = MT9M001_MAX_HEIGHT;
669 try_fmt->code = mt9m001->fmts[0].code;
670 try_fmt->colorspace = mt9m001->fmts[0].colorspace;
671 try_fmt->field = V4L2_FIELD_NONE;
672 try_fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
673 try_fmt->quantization = V4L2_QUANTIZATION_DEFAULT;
674 try_fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT;
675
676 return 0;
677}
678
679static int mt9m001_enum_mbus_code(struct v4l2_subdev *sd,
680 struct v4l2_subdev_state *sd_state,
681 struct v4l2_subdev_mbus_code_enum *code)
682{
683 struct i2c_client *client = v4l2_get_subdevdata(sd);
684 struct mt9m001 *mt9m001 = to_mt9m001(client);
685
686 if (code->pad || code->index >= mt9m001->num_fmts)
687 return -EINVAL;
688
689 code->code = mt9m001->fmts[code->index].code;
690 return 0;
691}
692
693static int mt9m001_get_mbus_config(struct v4l2_subdev *sd,
694 unsigned int pad,
695 struct v4l2_mbus_config *cfg)
696{
697
698 cfg->flags = V4L2_MBUS_PCLK_SAMPLE_FALLING |
699 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH |
700 V4L2_MBUS_DATA_ACTIVE_HIGH | V4L2_MBUS_MASTER;
701 cfg->type = V4L2_MBUS_PARALLEL;
702
703 return 0;
704}
705
706static const struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = {
707 .s_stream = mt9m001_s_stream,
708};
709
710static const struct v4l2_subdev_sensor_ops mt9m001_subdev_sensor_ops = {
711 .g_skip_top_lines = mt9m001_g_skip_top_lines,
712};
713
714static const struct v4l2_subdev_pad_ops mt9m001_subdev_pad_ops = {
715 .init_cfg = mt9m001_init_cfg,
716 .enum_mbus_code = mt9m001_enum_mbus_code,
717 .get_selection = mt9m001_get_selection,
718 .set_selection = mt9m001_set_selection,
719 .get_fmt = mt9m001_get_fmt,
720 .set_fmt = mt9m001_set_fmt,
721 .get_mbus_config = mt9m001_get_mbus_config,
722};
723
724static const struct v4l2_subdev_ops mt9m001_subdev_ops = {
725 .core = &mt9m001_subdev_core_ops,
726 .video = &mt9m001_subdev_video_ops,
727 .sensor = &mt9m001_subdev_sensor_ops,
728 .pad = &mt9m001_subdev_pad_ops,
729};
730
731static int mt9m001_probe(struct i2c_client *client)
732{
733 struct mt9m001 *mt9m001;
734 struct i2c_adapter *adapter = client->adapter;
735 int ret;
736
737 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
738 dev_warn(&adapter->dev,
739 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
740 return -EIO;
741 }
742
743 mt9m001 = devm_kzalloc(&client->dev, sizeof(*mt9m001), GFP_KERNEL);
744 if (!mt9m001)
745 return -ENOMEM;
746
747 mt9m001->clk = devm_clk_get(&client->dev, NULL);
748 if (IS_ERR(mt9m001->clk))
749 return PTR_ERR(mt9m001->clk);
750
751 mt9m001->standby_gpio = devm_gpiod_get_optional(&client->dev, "standby",
752 GPIOD_OUT_LOW);
753 if (IS_ERR(mt9m001->standby_gpio))
754 return PTR_ERR(mt9m001->standby_gpio);
755
756 mt9m001->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
757 GPIOD_OUT_LOW);
758 if (IS_ERR(mt9m001->reset_gpio))
759 return PTR_ERR(mt9m001->reset_gpio);
760
761 v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops);
762 mt9m001->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
763 V4L2_SUBDEV_FL_HAS_EVENTS;
764 v4l2_ctrl_handler_init(&mt9m001->hdl, 4);
765 v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
766 V4L2_CID_VFLIP, 0, 1, 1, 0);
767 v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
768 V4L2_CID_GAIN, 0, 127, 1, 64);
769 mt9m001->exposure = v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
770 V4L2_CID_EXPOSURE, 1, 255, 1, 255);
771
772
773
774
775 mt9m001->autoexposure = v4l2_ctrl_new_std_menu(&mt9m001->hdl,
776 &mt9m001_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
777 V4L2_EXPOSURE_AUTO);
778 mt9m001->subdev.ctrl_handler = &mt9m001->hdl;
779 if (mt9m001->hdl.error)
780 return mt9m001->hdl.error;
781
782 v4l2_ctrl_auto_cluster(2, &mt9m001->autoexposure,
783 V4L2_EXPOSURE_MANUAL, true);
784
785 mutex_init(&mt9m001->mutex);
786 mt9m001->hdl.lock = &mt9m001->mutex;
787
788
789 mt9m001->y_skip_top = 0;
790 mt9m001->rect.left = MT9M001_COLUMN_SKIP;
791 mt9m001->rect.top = MT9M001_ROW_SKIP;
792 mt9m001->rect.width = MT9M001_MAX_WIDTH;
793 mt9m001->rect.height = MT9M001_MAX_HEIGHT;
794
795 ret = mt9m001_power_on(&client->dev);
796 if (ret)
797 goto error_hdl_free;
798
799 pm_runtime_set_active(&client->dev);
800 pm_runtime_enable(&client->dev);
801
802 ret = mt9m001_video_probe(client);
803 if (ret)
804 goto error_power_off;
805
806 mt9m001->pad.flags = MEDIA_PAD_FL_SOURCE;
807 mt9m001->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
808 ret = media_entity_pads_init(&mt9m001->subdev.entity, 1, &mt9m001->pad);
809 if (ret)
810 goto error_power_off;
811
812 ret = v4l2_async_register_subdev(&mt9m001->subdev);
813 if (ret)
814 goto error_entity_cleanup;
815
816 pm_runtime_idle(&client->dev);
817
818 return 0;
819
820error_entity_cleanup:
821 media_entity_cleanup(&mt9m001->subdev.entity);
822error_power_off:
823 pm_runtime_disable(&client->dev);
824 pm_runtime_set_suspended(&client->dev);
825 mt9m001_power_off(&client->dev);
826
827error_hdl_free:
828 v4l2_ctrl_handler_free(&mt9m001->hdl);
829 mutex_destroy(&mt9m001->mutex);
830
831 return ret;
832}
833
834static int mt9m001_remove(struct i2c_client *client)
835{
836 struct mt9m001 *mt9m001 = to_mt9m001(client);
837
838
839
840
841
842 pm_runtime_get_sync(&client->dev);
843
844 v4l2_async_unregister_subdev(&mt9m001->subdev);
845 media_entity_cleanup(&mt9m001->subdev.entity);
846
847 pm_runtime_disable(&client->dev);
848 pm_runtime_set_suspended(&client->dev);
849 pm_runtime_put_noidle(&client->dev);
850 mt9m001_power_off(&client->dev);
851
852 v4l2_ctrl_handler_free(&mt9m001->hdl);
853 mutex_destroy(&mt9m001->mutex);
854
855 return 0;
856}
857
858static const struct i2c_device_id mt9m001_id[] = {
859 { "mt9m001", 0 },
860 { }
861};
862MODULE_DEVICE_TABLE(i2c, mt9m001_id);
863
864static const struct dev_pm_ops mt9m001_pm_ops = {
865 SET_RUNTIME_PM_OPS(mt9m001_power_off, mt9m001_power_on, NULL)
866};
867
868static const struct of_device_id mt9m001_of_match[] = {
869 { .compatible = "onnn,mt9m001", },
870 { },
871};
872MODULE_DEVICE_TABLE(of, mt9m001_of_match);
873
874static struct i2c_driver mt9m001_i2c_driver = {
875 .driver = {
876 .name = "mt9m001",
877 .pm = &mt9m001_pm_ops,
878 .of_match_table = mt9m001_of_match,
879 },
880 .probe_new = mt9m001_probe,
881 .remove = mt9m001_remove,
882 .id_table = mt9m001_id,
883};
884
885module_i2c_driver(mt9m001_i2c_driver);
886
887MODULE_DESCRIPTION("Micron MT9M001 Camera driver");
888MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
889MODULE_LICENSE("GPL v2");
890
