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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / media / i2c / mt9m001.c
blob12d3e86bdc0fdcda70008905569ab0ffaa8347b5
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Driver for MT9M001 CMOS Image Sensor from Micron
4 *
5 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
6 */
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 * mt9m001 i2c address 0x5d
25 */
26
27 /* mt9m001 selected register addresses */
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 /* MT9M001 has only one fixed colorspace per pixelcode */
55 struct mt9m001_datafmt {
56 u32 code;
57 enum v4l2_colorspace colorspace;
58 };
59
60 /* Find a data format by a pixel code in an array */
61 static 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
73 static const struct mt9m001_datafmt mt9m001_colour_fmts[] = {
74 /*
75 * Order important: first natively supported,
76 * second supported with a GPIO extender
77 */
78 {MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
79 {MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
80 };
81
82 static const struct mt9m001_datafmt mt9m001_monochrome_fmts[] = {
83 /* Order important - see above */
84 {MEDIA_BUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
85 {MEDIA_BUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
86 };
87
88 struct mt9m001 {
89 struct v4l2_subdev subdev;
90 struct v4l2_ctrl_handler hdl;
91 struct {
92 /* exposure/auto-exposure cluster */
93 struct v4l2_ctrl *autoexposure;
94 struct v4l2_ctrl *exposure;
95 };
96 struct mutex mutex;
97 struct v4l2_rect rect; /* Sensor window */
98 struct clk *clk;
99 struct gpio_desc *standby_gpio;
100 struct gpio_desc *reset_gpio;
101 const struct mt9m001_datafmt *fmt;
102 const struct mt9m001_datafmt *fmts;
103 int num_fmts;
104 unsigned int total_h;
105 unsigned short y_skip_top; /* Lines to skip at the top */
106 struct media_pad pad;
107 };
108
109 static struct mt9m001 *to_mt9m001(const struct i2c_client *client)
110 {
111 return container_of(i2c_get_clientdata(client), struct mt9m001, subdev);
112 }
113
114 static int reg_read(struct i2c_client *client, const u8 reg)
115 {
116 return i2c_smbus_read_word_swapped(client, reg);
117 }
118
119 static int reg_write(struct i2c_client *client, const u8 reg,
120 const u16 data)
121 {
122 return i2c_smbus_write_word_swapped(client, reg, data);
123 }
124
125 static int reg_set(struct i2c_client *client, const u8 reg,
126 const u16 data)
127 {
128 int ret;
129
130 ret = reg_read(client, reg);
131 if (ret < 0)
132 return ret;
133 return reg_write(client, reg, ret | data);
134 }
135
136 static int reg_clear(struct i2c_client *client, const u8 reg,
137 const u16 data)
138 {
139 int ret;
140
141 ret = reg_read(client, reg);
142 if (ret < 0)
143 return ret;
144 return reg_write(client, reg, ret & ~data);
145 }
146
147 struct mt9m001_reg {
148 u8 reg;
149 u16 data;
150 };
151
152 static int multi_reg_write(struct i2c_client *client,
153 const struct mt9m001_reg *regs, int num)
154 {
155 int i;
156
157 for (i = 0; i < num; i++) {
158 int ret = reg_write(client, regs[i].reg, regs[i].data);
159
160 if (ret)
161 return ret;
162 }
163
164 return 0;
165 }
166
167 static int mt9m001_init(struct i2c_client *client)
168 {
169 static const struct mt9m001_reg init_regs[] = {
170 /*
171 * Issue a soft reset. This returns all registers to their
172 * default values.
173 */
174 { MT9M001_RESET, 1 },
175 { MT9M001_RESET, 0 },
176 /* Disable chip, synchronous option update */
177 { MT9M001_OUTPUT_CONTROL, 0 }
178 };
179
180 dev_dbg(&client->dev, "%s\n", __func__);
181
182 return multi_reg_write(client, init_regs, ARRAY_SIZE(init_regs));
183 }
184
185 static int mt9m001_apply_selection(struct v4l2_subdev *sd)
186 {
187 struct i2c_client *client = v4l2_get_subdevdata(sd);
188 struct mt9m001 *mt9m001 = to_mt9m001(client);
189 const struct mt9m001_reg regs[] = {
190 /* Blanking and start values - default... */
191 { MT9M001_HORIZONTAL_BLANKING, MT9M001_DEFAULT_HBLANK },
192 { MT9M001_VERTICAL_BLANKING, MT9M001_DEFAULT_VBLANK },
193 /*
194 * The caller provides a supported format, as verified per
195 * call to .set_fmt(FORMAT_TRY).
196 */
197 { MT9M001_COLUMN_START, mt9m001->rect.left },
198 { MT9M001_ROW_START, mt9m001->rect.top },
199 { MT9M001_WINDOW_WIDTH, mt9m001->rect.width - 1 },
200 { MT9M001_WINDOW_HEIGHT,
201 mt9m001->rect.height + mt9m001->y_skip_top - 1 },
202 };
203
204 return multi_reg_write(client, regs, ARRAY_SIZE(regs));
205 }
206
207 static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable)
208 {
209 struct i2c_client *client = v4l2_get_subdevdata(sd);
210 struct mt9m001 *mt9m001 = to_mt9m001(client);
211 int ret = 0;
212
213 mutex_lock(&mt9m001->mutex);
214
215 if (enable) {
216 ret = pm_runtime_resume_and_get(&client->dev);
217 if (ret < 0)
218 goto unlock;
219
220 ret = mt9m001_apply_selection(sd);
221 if (ret)
222 goto put_unlock;
223
224 ret = __v4l2_ctrl_handler_setup(&mt9m001->hdl);
225 if (ret)
226 goto put_unlock;
227
228 /* Switch to master "normal" mode */
229 ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 2);
230 if (ret < 0)
231 goto put_unlock;
232 } else {
233 /* Switch to master stop sensor readout */
234 reg_write(client, MT9M001_OUTPUT_CONTROL, 0);
235 pm_runtime_put(&client->dev);
236 }
237
238 mutex_unlock(&mt9m001->mutex);
239
240 return 0;
241
242 put_unlock:
243 pm_runtime_put(&client->dev);
244 unlock:
245 mutex_unlock(&mt9m001->mutex);
246
247 return ret;
248 }
249
250 static int mt9m001_set_selection(struct v4l2_subdev *sd,
251 struct v4l2_subdev_state *sd_state,
252 struct v4l2_subdev_selection *sel)
253 {
254 struct i2c_client *client = v4l2_get_subdevdata(sd);
255 struct mt9m001 *mt9m001 = to_mt9m001(client);
256 struct v4l2_rect rect = sel->r;
257
258 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
259 sel->target != V4L2_SEL_TGT_CROP)
260 return -EINVAL;
261
262 if (mt9m001->fmts == mt9m001_colour_fmts)
263 /*
264 * Bayer format - even number of rows for simplicity,
265 * but let the user play with the top row.
266 */
267 rect.height = ALIGN(rect.height, 2);
268
269 /* Datasheet requirement: see register description */
270 rect.width = ALIGN(rect.width, 2);
271 rect.left = ALIGN(rect.left, 2);
272
273 rect.width = clamp_t(u32, rect.width, MT9M001_MIN_WIDTH,
274 MT9M001_MAX_WIDTH);
275 rect.left = clamp_t(u32, rect.left, MT9M001_COLUMN_SKIP,
276 MT9M001_COLUMN_SKIP + MT9M001_MAX_WIDTH - rect.width);
277
278 rect.height = clamp_t(u32, rect.height, MT9M001_MIN_HEIGHT,
279 MT9M001_MAX_HEIGHT);
280 rect.top = clamp_t(u32, rect.top, MT9M001_ROW_SKIP,
281 MT9M001_ROW_SKIP + MT9M001_MAX_HEIGHT - rect.height);
282
283 mt9m001->total_h = rect.height + mt9m001->y_skip_top +
284 MT9M001_DEFAULT_VBLANK;
285
286 mt9m001->rect = rect;
287
288 return 0;
289 }
290
291 static int mt9m001_get_selection(struct v4l2_subdev *sd,
292 struct v4l2_subdev_state *sd_state,
293 struct v4l2_subdev_selection *sel)
294 {
295 struct i2c_client *client = v4l2_get_subdevdata(sd);
296 struct mt9m001 *mt9m001 = to_mt9m001(client);
297
298 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
299 return -EINVAL;
300
301 switch (sel->target) {
302 case V4L2_SEL_TGT_CROP_BOUNDS:
303 sel->r.left = MT9M001_COLUMN_SKIP;
304 sel->r.top = MT9M001_ROW_SKIP;
305 sel->r.width = MT9M001_MAX_WIDTH;
306 sel->r.height = MT9M001_MAX_HEIGHT;
307 return 0;
308 case V4L2_SEL_TGT_CROP:
309 sel->r = mt9m001->rect;
310 return 0;
311 default:
312 return -EINVAL;
313 }
314 }
315
316 static int mt9m001_get_fmt(struct v4l2_subdev *sd,
317 struct v4l2_subdev_state *sd_state,
318 struct v4l2_subdev_format *format)
319 {
320 struct i2c_client *client = v4l2_get_subdevdata(sd);
321 struct mt9m001 *mt9m001 = to_mt9m001(client);
322 struct v4l2_mbus_framefmt *mf = &format->format;
323
324 if (format->pad)
325 return -EINVAL;
326
327 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
328 mf = v4l2_subdev_state_get_format(sd_state, 0);
329 format->format = *mf;
330 return 0;
331 }
332
333 mf->width = mt9m001->rect.width;
334 mf->height = mt9m001->rect.height;
335 mf->code = mt9m001->fmt->code;
336 mf->colorspace = mt9m001->fmt->colorspace;
337 mf->field = V4L2_FIELD_NONE;
338 mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
339 mf->quantization = V4L2_QUANTIZATION_DEFAULT;
340 mf->xfer_func = V4L2_XFER_FUNC_DEFAULT;
341
342 return 0;
343 }
344
345 static int mt9m001_s_fmt(struct v4l2_subdev *sd,
346 const struct mt9m001_datafmt *fmt,
347 struct v4l2_mbus_framefmt *mf)
348 {
349 struct i2c_client *client = v4l2_get_subdevdata(sd);
350 struct mt9m001 *mt9m001 = to_mt9m001(client);
351 struct v4l2_subdev_selection sel = {
352 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
353 .target = V4L2_SEL_TGT_CROP,
354 .r.left = mt9m001->rect.left,
355 .r.top = mt9m001->rect.top,
356 .r.width = mf->width,
357 .r.height = mf->height,
358 };
359 int ret;
360
361 /* No support for scaling so far, just crop. TODO: use skipping */
362 ret = mt9m001_set_selection(sd, NULL, &sel);
363 if (!ret) {
364 mf->width = mt9m001->rect.width;
365 mf->height = mt9m001->rect.height;
366 mt9m001->fmt = fmt;
367 mf->colorspace = fmt->colorspace;
368 }
369
370 return ret;
371 }
372
373 static int mt9m001_set_fmt(struct v4l2_subdev *sd,
374 struct v4l2_subdev_state *sd_state,
375 struct v4l2_subdev_format *format)
376 {
377 struct v4l2_mbus_framefmt *mf = &format->format;
378 struct i2c_client *client = v4l2_get_subdevdata(sd);
379 struct mt9m001 *mt9m001 = to_mt9m001(client);
380 const struct mt9m001_datafmt *fmt;
381
382 if (format->pad)
383 return -EINVAL;
384
385 v4l_bound_align_image(&mf->width, MT9M001_MIN_WIDTH,
386 MT9M001_MAX_WIDTH, 1,
387 &mf->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top,
388 MT9M001_MAX_HEIGHT + mt9m001->y_skip_top, 0, 0);
389
390 if (mt9m001->fmts == mt9m001_colour_fmts)
391 mf->height = ALIGN(mf->height - 1, 2);
392
393 fmt = mt9m001_find_datafmt(mf->code, mt9m001->fmts,
394 mt9m001->num_fmts);
395 if (!fmt) {
396 fmt = mt9m001->fmt;
397 mf->code = fmt->code;
398 }
399
400 mf->colorspace = fmt->colorspace;
401 mf->field = V4L2_FIELD_NONE;
402 mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
403 mf->quantization = V4L2_QUANTIZATION_DEFAULT;
404 mf->xfer_func = V4L2_XFER_FUNC_DEFAULT;
405
406 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
407 return mt9m001_s_fmt(sd, fmt, mf);
408 *v4l2_subdev_state_get_format(sd_state, 0) = *mf;
409 return 0;
410 }
411
412 #ifdef CONFIG_VIDEO_ADV_DEBUG
413 static int mt9m001_g_register(struct v4l2_subdev *sd,
414 struct v4l2_dbg_register *reg)
415 {
416 struct i2c_client *client = v4l2_get_subdevdata(sd);
417
418 if (reg->reg > 0xff)
419 return -EINVAL;
420
421 reg->size = 2;
422 reg->val = reg_read(client, reg->reg);
423
424 if (reg->val > 0xffff)
425 return -EIO;
426
427 return 0;
428 }
429
430 static int mt9m001_s_register(struct v4l2_subdev *sd,
431 const struct v4l2_dbg_register *reg)
432 {
433 struct i2c_client *client = v4l2_get_subdevdata(sd);
434
435 if (reg->reg > 0xff)
436 return -EINVAL;
437
438 if (reg_write(client, reg->reg, reg->val) < 0)
439 return -EIO;
440
441 return 0;
442 }
443 #endif
444
445 static int mt9m001_power_on(struct device *dev)
446 {
447 struct i2c_client *client = to_i2c_client(dev);
448 struct mt9m001 *mt9m001 = to_mt9m001(client);
449 int ret;
450
451 ret = clk_prepare_enable(mt9m001->clk);
452 if (ret)
453 return ret;
454
455 if (mt9m001->standby_gpio) {
456 gpiod_set_value_cansleep(mt9m001->standby_gpio, 0);
457 usleep_range(1000, 2000);
458 }
459
460 if (mt9m001->reset_gpio) {
461 gpiod_set_value_cansleep(mt9m001->reset_gpio, 1);
462 usleep_range(1000, 2000);
463 gpiod_set_value_cansleep(mt9m001->reset_gpio, 0);
464 usleep_range(1000, 2000);
465 }
466
467 return 0;
468 }
469
470 static int mt9m001_power_off(struct device *dev)
471 {
472 struct i2c_client *client = to_i2c_client(dev);
473 struct mt9m001 *mt9m001 = to_mt9m001(client);
474
475 gpiod_set_value_cansleep(mt9m001->standby_gpio, 1);
476 clk_disable_unprepare(mt9m001->clk);
477
478 return 0;
479 }
480
481 static int mt9m001_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
482 {
483 struct mt9m001 *mt9m001 = container_of(ctrl->handler,
484 struct mt9m001, hdl);
485 s32 min, max;
486
487 switch (ctrl->id) {
488 case V4L2_CID_EXPOSURE_AUTO:
489 min = mt9m001->exposure->minimum;
490 max = mt9m001->exposure->maximum;
491 mt9m001->exposure->val =
492 (524 + (mt9m001->total_h - 1) * (max - min)) / 1048 + min;
493 break;
494 }
495 return 0;
496 }
497
498 static int mt9m001_s_ctrl(struct v4l2_ctrl *ctrl)
499 {
500 struct mt9m001 *mt9m001 = container_of(ctrl->handler,
501 struct mt9m001, hdl);
502 struct v4l2_subdev *sd = &mt9m001->subdev;
503 struct i2c_client *client = v4l2_get_subdevdata(sd);
504 struct v4l2_ctrl *exp = mt9m001->exposure;
505 int data;
506 int ret;
507
508 if (!pm_runtime_get_if_in_use(&client->dev))
509 return 0;
510
511 switch (ctrl->id) {
512 case V4L2_CID_VFLIP:
513 if (ctrl->val)
514 ret = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000);
515 else
516 ret = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000);
517 break;
518
519 case V4L2_CID_GAIN:
520 /* See Datasheet Table 7, Gain settings. */
521 if (ctrl->val <= ctrl->default_value) {
522 /* Pack it into 0..1 step 0.125, register values 0..8 */
523 unsigned long range = ctrl->default_value - ctrl->minimum;
524 data = ((ctrl->val - (s32)ctrl->minimum) * 8 + range / 2) / range;
525
526 dev_dbg(&client->dev, "Setting gain %d\n", data);
527 ret = reg_write(client, MT9M001_GLOBAL_GAIN, data);
528 } else {
529 /* Pack it into 1.125..15 variable step, register values 9..67 */
530 /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
531 unsigned long range = ctrl->maximum - ctrl->default_value - 1;
532 unsigned long gain = ((ctrl->val - (s32)ctrl->default_value - 1) *
533 111 + range / 2) / range + 9;
534
535 if (gain <= 32)
536 data = gain;
537 else if (gain <= 64)
538 data = ((gain - 32) * 16 + 16) / 32 + 80;
539 else
540 data = ((gain - 64) * 7 + 28) / 56 + 96;
541
542 dev_dbg(&client->dev, "Setting gain from %d to %d\n",
543 reg_read(client, MT9M001_GLOBAL_GAIN), data);
544 ret = reg_write(client, MT9M001_GLOBAL_GAIN, data);
545 }
546 break;
547
548 case V4L2_CID_EXPOSURE_AUTO:
549 if (ctrl->val == V4L2_EXPOSURE_MANUAL) {
550 unsigned long range = exp->maximum - exp->minimum;
551 unsigned long shutter = ((exp->val - (s32)exp->minimum) * 1048 +
552 range / 2) / range + 1;
553
554 dev_dbg(&client->dev,
555 "Setting shutter width from %d to %lu\n",
556 reg_read(client, MT9M001_SHUTTER_WIDTH), shutter);
557 ret = reg_write(client, MT9M001_SHUTTER_WIDTH, shutter);
558 } else {
559 mt9m001->total_h = mt9m001->rect.height +
560 mt9m001->y_skip_top + MT9M001_DEFAULT_VBLANK;
561 ret = reg_write(client, MT9M001_SHUTTER_WIDTH,
562 mt9m001->total_h);
563 }
564 break;
565 default:
566 ret = -EINVAL;
567 break;
568 }
569
570 pm_runtime_put(&client->dev);
571
572 return ret;
573 }
574
575 /*
576 * Interface active, can use i2c. If it fails, it can indeed mean, that
577 * this wasn't our capture interface, so, we wait for the right one
578 */
579 static int mt9m001_video_probe(struct i2c_client *client)
580 {
581 struct mt9m001 *mt9m001 = to_mt9m001(client);
582 s32 data;
583 int ret;
584
585 /* Enable the chip */
586 data = reg_write(client, MT9M001_CHIP_ENABLE, 1);
587 dev_dbg(&client->dev, "write: %d\n", data);
588
589 /* Read out the chip version register */
590 data = reg_read(client, MT9M001_CHIP_VERSION);
591
592 /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */
593 switch (data) {
594 case 0x8411:
595 case 0x8421:
596 mt9m001->fmts = mt9m001_colour_fmts;
597 mt9m001->num_fmts = ARRAY_SIZE(mt9m001_colour_fmts);
598 break;
599 case 0x8431:
600 mt9m001->fmts = mt9m001_monochrome_fmts;
601 mt9m001->num_fmts = ARRAY_SIZE(mt9m001_monochrome_fmts);
602 break;
603 default:
604 dev_err(&client->dev,
605 "No MT9M001 chip detected, register read %x\n", data);
606 ret = -ENODEV;
607 goto done;
608 }
609
610 mt9m001->fmt = &mt9m001->fmts[0];
611
612 dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
613 data == 0x8431 ? "C12STM" : "C12ST");
614
615 ret = mt9m001_init(client);
616 if (ret < 0) {
617 dev_err(&client->dev, "Failed to initialise the camera\n");
618 goto done;
619 }
620
621 /* mt9m001_init() has reset the chip, returning registers to defaults */
622 ret = v4l2_ctrl_handler_setup(&mt9m001->hdl);
623
624 done:
625 return ret;
626 }
627
628 static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
629 {
630 struct i2c_client *client = v4l2_get_subdevdata(sd);
631 struct mt9m001 *mt9m001 = to_mt9m001(client);
632
633 *lines = mt9m001->y_skip_top;
634
635 return 0;
636 }
637
638 static const struct v4l2_ctrl_ops mt9m001_ctrl_ops = {
639 .g_volatile_ctrl = mt9m001_g_volatile_ctrl,
640 .s_ctrl = mt9m001_s_ctrl,
641 };
642
643 static const struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = {
644 .log_status = v4l2_ctrl_subdev_log_status,
645 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
646 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
647 #ifdef CONFIG_VIDEO_ADV_DEBUG
648 .g_register = mt9m001_g_register,
649 .s_register = mt9m001_s_register,
650 #endif
651 };
652
653 static int mt9m001_init_state(struct v4l2_subdev *sd,
654 struct v4l2_subdev_state *sd_state)
655 {
656 struct i2c_client *client = v4l2_get_subdevdata(sd);
657 struct mt9m001 *mt9m001 = to_mt9m001(client);
658 struct v4l2_mbus_framefmt *try_fmt =
659 v4l2_subdev_state_get_format(sd_state, 0);
660
661 try_fmt->width = MT9M001_MAX_WIDTH;
662 try_fmt->height = MT9M001_MAX_HEIGHT;
663 try_fmt->code = mt9m001->fmts[0].code;
664 try_fmt->colorspace = mt9m001->fmts[0].colorspace;
665 try_fmt->field = V4L2_FIELD_NONE;
666 try_fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
667 try_fmt->quantization = V4L2_QUANTIZATION_DEFAULT;
668 try_fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT;
669
670 return 0;
671 }
672
673 static int mt9m001_enum_mbus_code(struct v4l2_subdev *sd,
674 struct v4l2_subdev_state *sd_state,
675 struct v4l2_subdev_mbus_code_enum *code)
676 {
677 struct i2c_client *client = v4l2_get_subdevdata(sd);
678 struct mt9m001 *mt9m001 = to_mt9m001(client);
679
680 if (code->pad || code->index >= mt9m001->num_fmts)
681 return -EINVAL;
682
683 code->code = mt9m001->fmts[code->index].code;
684 return 0;
685 }
686
687 static int mt9m001_get_mbus_config(struct v4l2_subdev *sd,
688 unsigned int pad,
689 struct v4l2_mbus_config *cfg)
690 {
691 /* MT9M001 has all capture_format parameters fixed */
692 cfg->type = V4L2_MBUS_PARALLEL;
693 cfg->bus.parallel.flags = V4L2_MBUS_PCLK_SAMPLE_FALLING |
694 V4L2_MBUS_HSYNC_ACTIVE_HIGH |
695 V4L2_MBUS_VSYNC_ACTIVE_HIGH |
696 V4L2_MBUS_DATA_ACTIVE_HIGH |
697 V4L2_MBUS_MASTER;
698
699 return 0;
700 }
701
702 static const struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = {
703 .s_stream = mt9m001_s_stream,
704 };
705
706 static const struct v4l2_subdev_sensor_ops mt9m001_subdev_sensor_ops = {
707 .g_skip_top_lines = mt9m001_g_skip_top_lines,
708 };
709
710 static const struct v4l2_subdev_pad_ops mt9m001_subdev_pad_ops = {
711 .enum_mbus_code = mt9m001_enum_mbus_code,
712 .get_selection = mt9m001_get_selection,
713 .set_selection = mt9m001_set_selection,
714 .get_fmt = mt9m001_get_fmt,
715 .set_fmt = mt9m001_set_fmt,
716 .get_mbus_config = mt9m001_get_mbus_config,
717 };
718
719 static const struct v4l2_subdev_ops mt9m001_subdev_ops = {
720 .core = &mt9m001_subdev_core_ops,
721 .video = &mt9m001_subdev_video_ops,
722 .sensor = &mt9m001_subdev_sensor_ops,
723 .pad = &mt9m001_subdev_pad_ops,
724 };
725
726 static const struct v4l2_subdev_internal_ops mt9m001_internal_ops = {
727 .init_state = mt9m001_init_state,
728 };
729
730 static int mt9m001_probe(struct i2c_client *client)
731 {
732 struct mt9m001 *mt9m001;
733 struct i2c_adapter *adapter = client->adapter;
734 int ret;
735
736 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
737 dev_warn(&adapter->dev,
738 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
739 return -EIO;
740 }
741
742 mt9m001 = devm_kzalloc(&client->dev, sizeof(*mt9m001), GFP_KERNEL);
743 if (!mt9m001)
744 return -ENOMEM;
745
746 mt9m001->clk = devm_clk_get(&client->dev, NULL);
747 if (IS_ERR(mt9m001->clk))
748 return PTR_ERR(mt9m001->clk);
749
750 mt9m001->standby_gpio = devm_gpiod_get_optional(&client->dev, "standby",
751 GPIOD_OUT_LOW);
752 if (IS_ERR(mt9m001->standby_gpio))
753 return PTR_ERR(mt9m001->standby_gpio);
754
755 mt9m001->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
756 GPIOD_OUT_LOW);
757 if (IS_ERR(mt9m001->reset_gpio))
758 return PTR_ERR(mt9m001->reset_gpio);
759
760 v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops);
761 mt9m001->subdev.internal_ops = &mt9m001_internal_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 * Simulated autoexposure. If enabled, we calculate shutter width
773 * ourselves in the driver based on vertical blanking and frame width
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 /* Second stage probe - when a capture adapter is there */
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
820 error_entity_cleanup:
821 media_entity_cleanup(&mt9m001->subdev.entity);
822 error_power_off:
823 pm_runtime_disable(&client->dev);
824 pm_runtime_set_suspended(&client->dev);
825 mt9m001_power_off(&client->dev);
826
827 error_hdl_free:
828 v4l2_ctrl_handler_free(&mt9m001->hdl);
829 mutex_destroy(&mt9m001->mutex);
830
831 return ret;
832 }
833
834 static void mt9m001_remove(struct i2c_client *client)
835 {
836 struct mt9m001 *mt9m001 = to_mt9m001(client);
837
838 /*
839 * As it increments RPM usage_count even on errors, we don't need to
840 * check the returned code here.
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
856 static const struct i2c_device_id mt9m001_id[] = {
857 { "mt9m001" },
858 { }
859 };
860 MODULE_DEVICE_TABLE(i2c, mt9m001_id);
861
862 static const struct dev_pm_ops mt9m001_pm_ops = {
863 SET_RUNTIME_PM_OPS(mt9m001_power_off, mt9m001_power_on, NULL)
864 };
865
866 static const struct of_device_id mt9m001_of_match[] = {
867 { .compatible = "onnn,mt9m001", },
868 { /* sentinel */ },
869 };
870 MODULE_DEVICE_TABLE(of, mt9m001_of_match);
871
872 static struct i2c_driver mt9m001_i2c_driver = {
873 .driver = {
874 .name = "mt9m001",
875 .pm = &mt9m001_pm_ops,
876 .of_match_table = mt9m001_of_match,
877 },
878 .probe = mt9m001_probe,
879 .remove = mt9m001_remove,
880 .id_table = mt9m001_id,
881 };
882
883 module_i2c_driver(mt9m001_i2c_driver);
884
885 MODULE_DESCRIPTION("Micron MT9M001 Camera driver");
886 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
887 MODULE_LICENSE("GPL v2");
Kernel DRM miscellaneous fixes and cross-tree changes