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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / media / i2c / mt9m001.c
blob210ea76adb536b04226c6aa1c83e89f29b0771d3
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 bool streaming;
97 struct mutex mutex;
98 struct v4l2_rect rect; /* Sensor window */
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; /* Lines to skip at the top */
107 struct media_pad pad;
108 };
109
110 static struct mt9m001 *to_mt9m001(const struct i2c_client *client)
111 {
112 return container_of(i2c_get_clientdata(client), struct mt9m001, subdev);
113 }
114
115 static int reg_read(struct i2c_client *client, const u8 reg)
116 {
117 return i2c_smbus_read_word_swapped(client, reg);
118 }
119
120 static 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
126 static 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
137 static 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
148 struct mt9m001_reg {
149 u8 reg;
150 u16 data;
151 };
152
153 static 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
168 static int mt9m001_init(struct i2c_client *client)
169 {
170 static const struct mt9m001_reg init_regs[] = {
171 /*
172 * Issue a soft reset. This returns all registers to their
173 * default values.
174 */
175 { MT9M001_RESET, 1 },
176 { MT9M001_RESET, 0 },
177 /* Disable chip, synchronous option update */
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
186 static 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 /* Blanking and start values - default... */
192 { MT9M001_HORIZONTAL_BLANKING, MT9M001_DEFAULT_HBLANK },
193 { MT9M001_VERTICAL_BLANKING, MT9M001_DEFAULT_VBLANK },
194 /*
195 * The caller provides a supported format, as verified per
196 * call to .set_fmt(FORMAT_TRY).
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
208 static 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_get_sync(&client->dev);
221 if (ret < 0)
222 goto put_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 /* Switch to master "normal" mode */
233 ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 2);
234 if (ret < 0)
235 goto put_unlock;
236 } else {
237 /* Switch to master stop sensor readout */
238 reg_write(client, MT9M001_OUTPUT_CONTROL, 0);
239 pm_runtime_put(&client->dev);
240 }
241
242 mt9m001->streaming = enable;
243 done:
244 mutex_unlock(&mt9m001->mutex);
245
246 return 0;
247
248 put_unlock:
249 pm_runtime_put(&client->dev);
250 mutex_unlock(&mt9m001->mutex);
251
252 return ret;
253 }
254
255 static int mt9m001_set_selection(struct v4l2_subdev *sd,
256 struct v4l2_subdev_pad_config *cfg,
257 struct v4l2_subdev_selection *sel)
258 {
259 struct i2c_client *client = v4l2_get_subdevdata(sd);
260 struct mt9m001 *mt9m001 = to_mt9m001(client);
261 struct v4l2_rect rect = sel->r;
262
263 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
264 sel->target != V4L2_SEL_TGT_CROP)
265 return -EINVAL;
266
267 if (mt9m001->fmts == mt9m001_colour_fmts)
268 /*
269 * Bayer format - even number of rows for simplicity,
270 * but let the user play with the top row.
271 */
272 rect.height = ALIGN(rect.height, 2);
273
274 /* Datasheet requirement: see register description */
275 rect.width = ALIGN(rect.width, 2);
276 rect.left = ALIGN(rect.left, 2);
277
278 rect.width = clamp_t(u32, rect.width, MT9M001_MIN_WIDTH,
279 MT9M001_MAX_WIDTH);
280 rect.left = clamp_t(u32, rect.left, MT9M001_COLUMN_SKIP,
281 MT9M001_COLUMN_SKIP + MT9M001_MAX_WIDTH - rect.width);
282
283 rect.height = clamp_t(u32, rect.height, MT9M001_MIN_HEIGHT,
284 MT9M001_MAX_HEIGHT);
285 rect.top = clamp_t(u32, rect.top, MT9M001_ROW_SKIP,
286 MT9M001_ROW_SKIP + MT9M001_MAX_HEIGHT - rect.height);
287
288 mt9m001->total_h = rect.height + mt9m001->y_skip_top +
289 MT9M001_DEFAULT_VBLANK;
290
291 mt9m001->rect = rect;
292
293 return 0;
294 }
295
296 static int mt9m001_get_selection(struct v4l2_subdev *sd,
297 struct v4l2_subdev_pad_config *cfg,
298 struct v4l2_subdev_selection *sel)
299 {
300 struct i2c_client *client = v4l2_get_subdevdata(sd);
301 struct mt9m001 *mt9m001 = to_mt9m001(client);
302
303 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
304 return -EINVAL;
305
306 switch (sel->target) {
307 case V4L2_SEL_TGT_CROP_BOUNDS:
308 sel->r.left = MT9M001_COLUMN_SKIP;
309 sel->r.top = MT9M001_ROW_SKIP;
310 sel->r.width = MT9M001_MAX_WIDTH;
311 sel->r.height = MT9M001_MAX_HEIGHT;
312 return 0;
313 case V4L2_SEL_TGT_CROP:
314 sel->r = mt9m001->rect;
315 return 0;
316 default:
317 return -EINVAL;
318 }
319 }
320
321 static int mt9m001_get_fmt(struct v4l2_subdev *sd,
322 struct v4l2_subdev_pad_config *cfg,
323 struct v4l2_subdev_format *format)
324 {
325 struct i2c_client *client = v4l2_get_subdevdata(sd);
326 struct mt9m001 *mt9m001 = to_mt9m001(client);
327 struct v4l2_mbus_framefmt *mf = &format->format;
328
329 if (format->pad)
330 return -EINVAL;
331
332 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
333 mf = v4l2_subdev_get_try_format(sd, cfg, 0);
334 format->format = *mf;
335 return 0;
336 }
337
338 mf->width = mt9m001->rect.width;
339 mf->height = mt9m001->rect.height;
340 mf->code = mt9m001->fmt->code;
341 mf->colorspace = mt9m001->fmt->colorspace;
342 mf->field = V4L2_FIELD_NONE;
343 mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
344 mf->quantization = V4L2_QUANTIZATION_DEFAULT;
345 mf->xfer_func = V4L2_XFER_FUNC_DEFAULT;
346
347 return 0;
348 }
349
350 static int mt9m001_s_fmt(struct v4l2_subdev *sd,
351 const struct mt9m001_datafmt *fmt,
352 struct v4l2_mbus_framefmt *mf)
353 {
354 struct i2c_client *client = v4l2_get_subdevdata(sd);
355 struct mt9m001 *mt9m001 = to_mt9m001(client);
356 struct v4l2_subdev_selection sel = {
357 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
358 .target = V4L2_SEL_TGT_CROP,
359 .r.left = mt9m001->rect.left,
360 .r.top = mt9m001->rect.top,
361 .r.width = mf->width,
362 .r.height = mf->height,
363 };
364 int ret;
365
366 /* No support for scaling so far, just crop. TODO: use skipping */
367 ret = mt9m001_set_selection(sd, NULL, &sel);
368 if (!ret) {
369 mf->width = mt9m001->rect.width;
370 mf->height = mt9m001->rect.height;
371 mt9m001->fmt = fmt;
372 mf->colorspace = fmt->colorspace;
373 }
374
375 return ret;
376 }
377
378 static int mt9m001_set_fmt(struct v4l2_subdev *sd,
379 struct v4l2_subdev_pad_config *cfg,
380 struct v4l2_subdev_format *format)
381 {
382 struct v4l2_mbus_framefmt *mf = &format->format;
383 struct i2c_client *client = v4l2_get_subdevdata(sd);
384 struct mt9m001 *mt9m001 = to_mt9m001(client);
385 const struct mt9m001_datafmt *fmt;
386
387 if (format->pad)
388 return -EINVAL;
389
390 v4l_bound_align_image(&mf->width, MT9M001_MIN_WIDTH,
391 MT9M001_MAX_WIDTH, 1,
392 &mf->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top,
393 MT9M001_MAX_HEIGHT + mt9m001->y_skip_top, 0, 0);
394
395 if (mt9m001->fmts == mt9m001_colour_fmts)
396 mf->height = ALIGN(mf->height - 1, 2);
397
398 fmt = mt9m001_find_datafmt(mf->code, mt9m001->fmts,
399 mt9m001->num_fmts);
400 if (!fmt) {
401 fmt = mt9m001->fmt;
402 mf->code = fmt->code;
403 }
404
405 mf->colorspace = fmt->colorspace;
406 mf->field = V4L2_FIELD_NONE;
407 mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
408 mf->quantization = V4L2_QUANTIZATION_DEFAULT;
409 mf->xfer_func = V4L2_XFER_FUNC_DEFAULT;
410
411 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
412 return mt9m001_s_fmt(sd, fmt, mf);
413 cfg->try_fmt = *mf;
414 return 0;
415 }
416
417 #ifdef CONFIG_VIDEO_ADV_DEBUG
418 static int mt9m001_g_register(struct v4l2_subdev *sd,
419 struct v4l2_dbg_register *reg)
420 {
421 struct i2c_client *client = v4l2_get_subdevdata(sd);
422
423 if (reg->reg > 0xff)
424 return -EINVAL;
425
426 reg->size = 2;
427 reg->val = reg_read(client, reg->reg);
428
429 if (reg->val > 0xffff)
430 return -EIO;
431
432 return 0;
433 }
434
435 static int mt9m001_s_register(struct v4l2_subdev *sd,
436 const struct v4l2_dbg_register *reg)
437 {
438 struct i2c_client *client = v4l2_get_subdevdata(sd);
439
440 if (reg->reg > 0xff)
441 return -EINVAL;
442
443 if (reg_write(client, reg->reg, reg->val) < 0)
444 return -EIO;
445
446 return 0;
447 }
448 #endif
449
450 static int mt9m001_power_on(struct device *dev)
451 {
452 struct i2c_client *client = to_i2c_client(dev);
453 struct mt9m001 *mt9m001 = to_mt9m001(client);
454 int ret;
455
456 ret = clk_prepare_enable(mt9m001->clk);
457 if (ret)
458 return ret;
459
460 if (mt9m001->standby_gpio) {
461 gpiod_set_value_cansleep(mt9m001->standby_gpio, 0);
462 usleep_range(1000, 2000);
463 }
464
465 if (mt9m001->reset_gpio) {
466 gpiod_set_value_cansleep(mt9m001->reset_gpio, 1);
467 usleep_range(1000, 2000);
468 gpiod_set_value_cansleep(mt9m001->reset_gpio, 0);
469 usleep_range(1000, 2000);
470 }
471
472 return 0;
473 }
474
475 static int mt9m001_power_off(struct device *dev)
476 {
477 struct i2c_client *client = to_i2c_client(dev);
478 struct mt9m001 *mt9m001 = to_mt9m001(client);
479
480 gpiod_set_value_cansleep(mt9m001->standby_gpio, 1);
481 clk_disable_unprepare(mt9m001->clk);
482
483 return 0;
484 }
485
486 static int mt9m001_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
487 {
488 struct mt9m001 *mt9m001 = container_of(ctrl->handler,
489 struct mt9m001, hdl);
490 s32 min, max;
491
492 switch (ctrl->id) {
493 case V4L2_CID_EXPOSURE_AUTO:
494 min = mt9m001->exposure->minimum;
495 max = mt9m001->exposure->maximum;
496 mt9m001->exposure->val =
497 (524 + (mt9m001->total_h - 1) * (max - min)) / 1048 + min;
498 break;
499 }
500 return 0;
501 }
502
503 static int mt9m001_s_ctrl(struct v4l2_ctrl *ctrl)
504 {
505 struct mt9m001 *mt9m001 = container_of(ctrl->handler,
506 struct mt9m001, hdl);
507 struct v4l2_subdev *sd = &mt9m001->subdev;
508 struct i2c_client *client = v4l2_get_subdevdata(sd);
509 struct v4l2_ctrl *exp = mt9m001->exposure;
510 int data;
511 int ret;
512
513 if (!pm_runtime_get_if_in_use(&client->dev))
514 return 0;
515
516 switch (ctrl->id) {
517 case V4L2_CID_VFLIP:
518 if (ctrl->val)
519 ret = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000);
520 else
521 ret = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000);
522 break;
523
524 case V4L2_CID_GAIN:
525 /* See Datasheet Table 7, Gain settings. */
526 if (ctrl->val <= ctrl->default_value) {
527 /* Pack it into 0..1 step 0.125, register values 0..8 */
528 unsigned long range = ctrl->default_value - ctrl->minimum;
529 data = ((ctrl->val - (s32)ctrl->minimum) * 8 + range / 2) / range;
530
531 dev_dbg(&client->dev, "Setting gain %d\n", data);
532 ret = reg_write(client, MT9M001_GLOBAL_GAIN, data);
533 } else {
534 /* Pack it into 1.125..15 variable step, register values 9..67 */
535 /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
536 unsigned long range = ctrl->maximum - ctrl->default_value - 1;
537 unsigned long gain = ((ctrl->val - (s32)ctrl->default_value - 1) *
538 111 + range / 2) / range + 9;
539
540 if (gain <= 32)
541 data = gain;
542 else if (gain <= 64)
543 data = ((gain - 32) * 16 + 16) / 32 + 80;
544 else
545 data = ((gain - 64) * 7 + 28) / 56 + 96;
546
547 dev_dbg(&client->dev, "Setting gain from %d to %d\n",
548 reg_read(client, MT9M001_GLOBAL_GAIN), data);
549 ret = reg_write(client, MT9M001_GLOBAL_GAIN, data);
550 }
551 break;
552
553 case V4L2_CID_EXPOSURE_AUTO:
554 if (ctrl->val == V4L2_EXPOSURE_MANUAL) {
555 unsigned long range = exp->maximum - exp->minimum;
556 unsigned long shutter = ((exp->val - (s32)exp->minimum) * 1048 +
557 range / 2) / range + 1;
558
559 dev_dbg(&client->dev,
560 "Setting shutter width from %d to %lu\n",
561 reg_read(client, MT9M001_SHUTTER_WIDTH), shutter);
562 ret = reg_write(client, MT9M001_SHUTTER_WIDTH, shutter);
563 } else {
564 mt9m001->total_h = mt9m001->rect.height +
565 mt9m001->y_skip_top + MT9M001_DEFAULT_VBLANK;
566 ret = reg_write(client, MT9M001_SHUTTER_WIDTH,
567 mt9m001->total_h);
568 }
569 break;
570 default:
571 ret = -EINVAL;
572 break;
573 }
574
575 pm_runtime_put(&client->dev);
576
577 return ret;
578 }
579
580 /*
581 * Interface active, can use i2c. If it fails, it can indeed mean, that
582 * this wasn't our capture interface, so, we wait for the right one
583 */
584 static int mt9m001_video_probe(struct i2c_client *client)
585 {
586 struct mt9m001 *mt9m001 = to_mt9m001(client);
587 s32 data;
588 int ret;
589
590 /* Enable the chip */
591 data = reg_write(client, MT9M001_CHIP_ENABLE, 1);
592 dev_dbg(&client->dev, "write: %d\n", data);
593
594 /* Read out the chip version register */
595 data = reg_read(client, MT9M001_CHIP_VERSION);
596
597 /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */
598 switch (data) {
599 case 0x8411:
600 case 0x8421:
601 mt9m001->fmts = mt9m001_colour_fmts;
602 mt9m001->num_fmts = ARRAY_SIZE(mt9m001_colour_fmts);
603 break;
604 case 0x8431:
605 mt9m001->fmts = mt9m001_monochrome_fmts;
606 mt9m001->num_fmts = ARRAY_SIZE(mt9m001_monochrome_fmts);
607 break;
608 default:
609 dev_err(&client->dev,
610 "No MT9M001 chip detected, register read %x\n", data);
611 ret = -ENODEV;
612 goto done;
613 }
614
615 mt9m001->fmt = &mt9m001->fmts[0];
616
617 dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
618 data == 0x8431 ? "C12STM" : "C12ST");
619
620 ret = mt9m001_init(client);
621 if (ret < 0) {
622 dev_err(&client->dev, "Failed to initialise the camera\n");
623 goto done;
624 }
625
626 /* mt9m001_init() has reset the chip, returning registers to defaults */
627 ret = v4l2_ctrl_handler_setup(&mt9m001->hdl);
628
629 done:
630 return ret;
631 }
632
633 static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
634 {
635 struct i2c_client *client = v4l2_get_subdevdata(sd);
636 struct mt9m001 *mt9m001 = to_mt9m001(client);
637
638 *lines = mt9m001->y_skip_top;
639
640 return 0;
641 }
642
643 static const struct v4l2_ctrl_ops mt9m001_ctrl_ops = {
644 .g_volatile_ctrl = mt9m001_g_volatile_ctrl,
645 .s_ctrl = mt9m001_s_ctrl,
646 };
647
648 static const struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = {
649 .log_status = v4l2_ctrl_subdev_log_status,
650 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
651 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
652 #ifdef CONFIG_VIDEO_ADV_DEBUG
653 .g_register = mt9m001_g_register,
654 .s_register = mt9m001_s_register,
655 #endif
656 };
657
658 static int mt9m001_init_cfg(struct v4l2_subdev *sd,
659 struct v4l2_subdev_pad_config *cfg)
660 {
661 struct i2c_client *client = v4l2_get_subdevdata(sd);
662 struct mt9m001 *mt9m001 = to_mt9m001(client);
663 struct v4l2_mbus_framefmt *try_fmt =
664 v4l2_subdev_get_try_format(sd, cfg, 0);
665
666 try_fmt->width = MT9M001_MAX_WIDTH;
667 try_fmt->height = MT9M001_MAX_HEIGHT;
668 try_fmt->code = mt9m001->fmts[0].code;
669 try_fmt->colorspace = mt9m001->fmts[0].colorspace;
670 try_fmt->field = V4L2_FIELD_NONE;
671 try_fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
672 try_fmt->quantization = V4L2_QUANTIZATION_DEFAULT;
673 try_fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT;
674
675 return 0;
676 }
677
678 static int mt9m001_enum_mbus_code(struct v4l2_subdev *sd,
679 struct v4l2_subdev_pad_config *cfg,
680 struct v4l2_subdev_mbus_code_enum *code)
681 {
682 struct i2c_client *client = v4l2_get_subdevdata(sd);
683 struct mt9m001 *mt9m001 = to_mt9m001(client);
684
685 if (code->pad || code->index >= mt9m001->num_fmts)
686 return -EINVAL;
687
688 code->code = mt9m001->fmts[code->index].code;
689 return 0;
690 }
691
692 static int mt9m001_g_mbus_config(struct v4l2_subdev *sd,
693 struct v4l2_mbus_config *cfg)
694 {
695 /* MT9M001 has all capture_format parameters fixed */
696 cfg->flags = V4L2_MBUS_PCLK_SAMPLE_FALLING |
697 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH |
698 V4L2_MBUS_DATA_ACTIVE_HIGH | V4L2_MBUS_MASTER;
699 cfg->type = V4L2_MBUS_PARALLEL;
700
701 return 0;
702 }
703
704 static const struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = {
705 .s_stream = mt9m001_s_stream,
706 .g_mbus_config = mt9m001_g_mbus_config,
707 };
708
709 static const struct v4l2_subdev_sensor_ops mt9m001_subdev_sensor_ops = {
710 .g_skip_top_lines = mt9m001_g_skip_top_lines,
711 };
712
713 static const struct v4l2_subdev_pad_ops mt9m001_subdev_pad_ops = {
714 .init_cfg = mt9m001_init_cfg,
715 .enum_mbus_code = mt9m001_enum_mbus_code,
716 .get_selection = mt9m001_get_selection,
717 .set_selection = mt9m001_set_selection,
718 .get_fmt = mt9m001_get_fmt,
719 .set_fmt = mt9m001_set_fmt,
720 };
721
722 static const struct v4l2_subdev_ops mt9m001_subdev_ops = {
723 .core = &mt9m001_subdev_core_ops,
724 .video = &mt9m001_subdev_video_ops,
725 .sensor = &mt9m001_subdev_sensor_ops,
726 .pad = &mt9m001_subdev_pad_ops,
727 };
728
729 static int mt9m001_probe(struct i2c_client *client)
730 {
731 struct mt9m001 *mt9m001;
732 struct i2c_adapter *adapter = client->adapter;
733 int ret;
734
735 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
736 dev_warn(&adapter->dev,
737 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
738 return -EIO;
739 }
740
741 mt9m001 = devm_kzalloc(&client->dev, sizeof(*mt9m001), GFP_KERNEL);
742 if (!mt9m001)
743 return -ENOMEM;
744
745 mt9m001->clk = devm_clk_get(&client->dev, NULL);
746 if (IS_ERR(mt9m001->clk))
747 return PTR_ERR(mt9m001->clk);
748
749 mt9m001->standby_gpio = devm_gpiod_get_optional(&client->dev, "standby",
750 GPIOD_OUT_LOW);
751 if (IS_ERR(mt9m001->standby_gpio))
752 return PTR_ERR(mt9m001->standby_gpio);
753
754 mt9m001->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
755 GPIOD_OUT_LOW);
756 if (IS_ERR(mt9m001->reset_gpio))
757 return PTR_ERR(mt9m001->reset_gpio);
758
759 v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops);
760 mt9m001->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
761 V4L2_SUBDEV_FL_HAS_EVENTS;
762 v4l2_ctrl_handler_init(&mt9m001->hdl, 4);
763 v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
764 V4L2_CID_VFLIP, 0, 1, 1, 0);
765 v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
766 V4L2_CID_GAIN, 0, 127, 1, 64);
767 mt9m001->exposure = v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
768 V4L2_CID_EXPOSURE, 1, 255, 1, 255);
769 /*
770 * Simulated autoexposure. If enabled, we calculate shutter width
771 * ourselves in the driver based on vertical blanking and frame width
772 */
773 mt9m001->autoexposure = v4l2_ctrl_new_std_menu(&mt9m001->hdl,
774 &mt9m001_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
775 V4L2_EXPOSURE_AUTO);
776 mt9m001->subdev.ctrl_handler = &mt9m001->hdl;
777 if (mt9m001->hdl.error)
778 return mt9m001->hdl.error;
779
780 v4l2_ctrl_auto_cluster(2, &mt9m001->autoexposure,
781 V4L2_EXPOSURE_MANUAL, true);
782
783 mutex_init(&mt9m001->mutex);
784 mt9m001->hdl.lock = &mt9m001->mutex;
785
786 /* Second stage probe - when a capture adapter is there */
787 mt9m001->y_skip_top = 0;
788 mt9m001->rect.left = MT9M001_COLUMN_SKIP;
789 mt9m001->rect.top = MT9M001_ROW_SKIP;
790 mt9m001->rect.width = MT9M001_MAX_WIDTH;
791 mt9m001->rect.height = MT9M001_MAX_HEIGHT;
792
793 ret = mt9m001_power_on(&client->dev);
794 if (ret)
795 goto error_hdl_free;
796
797 pm_runtime_set_active(&client->dev);
798 pm_runtime_enable(&client->dev);
799
800 ret = mt9m001_video_probe(client);
801 if (ret)
802 goto error_power_off;
803
804 mt9m001->pad.flags = MEDIA_PAD_FL_SOURCE;
805 mt9m001->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
806 ret = media_entity_pads_init(&mt9m001->subdev.entity, 1, &mt9m001->pad);
807 if (ret)
808 goto error_power_off;
809
810 ret = v4l2_async_register_subdev(&mt9m001->subdev);
811 if (ret)
812 goto error_entity_cleanup;
813
814 pm_runtime_idle(&client->dev);
815
816 return 0;
817
818 error_entity_cleanup:
819 media_entity_cleanup(&mt9m001->subdev.entity);
820 error_power_off:
821 pm_runtime_disable(&client->dev);
822 pm_runtime_set_suspended(&client->dev);
823 mt9m001_power_off(&client->dev);
824
825 error_hdl_free:
826 v4l2_ctrl_handler_free(&mt9m001->hdl);
827 mutex_destroy(&mt9m001->mutex);
828
829 return ret;
830 }
831
832 static int mt9m001_remove(struct i2c_client *client)
833 {
834 struct mt9m001 *mt9m001 = to_mt9m001(client);
835
836 pm_runtime_get_sync(&client->dev);
837
838 v4l2_async_unregister_subdev(&mt9m001->subdev);
839 media_entity_cleanup(&mt9m001->subdev.entity);
840
841 pm_runtime_disable(&client->dev);
842 pm_runtime_set_suspended(&client->dev);
843 pm_runtime_put_noidle(&client->dev);
844 mt9m001_power_off(&client->dev);
845
846 v4l2_ctrl_handler_free(&mt9m001->hdl);
847 mutex_destroy(&mt9m001->mutex);
848
849 return 0;
850 }
851
852 static const struct i2c_device_id mt9m001_id[] = {
853 { "mt9m001", 0 },
854 { }
855 };
856 MODULE_DEVICE_TABLE(i2c, mt9m001_id);
857
858 static const struct dev_pm_ops mt9m001_pm_ops = {
859 SET_RUNTIME_PM_OPS(mt9m001_power_off, mt9m001_power_on, NULL)
860 };
861
862 static const struct of_device_id mt9m001_of_match[] = {
863 { .compatible = "onnn,mt9m001", },
864 { /* sentinel */ },
865 };
866 MODULE_DEVICE_TABLE(of, mt9m001_of_match);
867
868 static struct i2c_driver mt9m001_i2c_driver = {
869 .driver = {
870 .name = "mt9m001",
871 .pm = &mt9m001_pm_ops,
872 .of_match_table = mt9m001_of_match,
873 },
874 .probe_new = mt9m001_probe,
875 .remove = mt9m001_remove,
876 .id_table = mt9m001_id,
877 };
878
879 module_i2c_driver(mt9m001_i2c_driver);
880
881 MODULE_DESCRIPTION("Micron MT9M001 Camera driver");
882 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
883 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support