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Merge tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[linux-2.6-block.git] / drivers / media / video / mt9m032.c
CommitLineData
251cb88e
MH		 1/*
2 * Driver for MT9M032 CMOS Image Sensor from Micron
3 *
4 * Copyright (C) 2010-2011 Lund Engineering
5 * Contact: Gil Lund <gwlund@lundeng.com>
6 * Author: Martin Hostettler <martin@neutronstar.dyndns.org>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 */
22
23#include <linux/delay.h>
24#include <linux/i2c.h>
25#include <linux/init.h>
26#include <linux/kernel.h>
27#include <linux/math64.h>
28#include <linux/module.h>
29#include <linux/mutex.h>
30#include <linux/slab.h>
31#include <linux/v4l2-mediabus.h>
32
33#include <media/media-entity.h>
34#include <media/mt9m032.h>
35#include <media/v4l2-ctrls.h>
36#include <media/v4l2-device.h>
37#include <media/v4l2-subdev.h>
38
39#include "aptina-pll.h"
40
41/*
42 * width and height include active boundary and black parts
43 *
44 * column 0- 15 active boundary
45 * column 16-1455 image
46 * column 1456-1471 active boundary
47 * column 1472-1599 black
48 *
49 * row 0- 51 black
50 * row 53- 59 active boundary
51 * row 60-1139 image
52 * row 1140-1147 active boundary
53 * row 1148-1151 black
54 */
55
56#define MT9M032_PIXEL_ARRAY_WIDTH 1600
57#define MT9M032_PIXEL_ARRAY_HEIGHT 1152
58
59#define MT9M032_CHIP_VERSION 0x00
60#define MT9M032_CHIP_VERSION_VALUE 0x1402
61#define MT9M032_ROW_START 0x01
62#define MT9M032_ROW_START_MIN 0
63#define MT9M032_ROW_START_MAX 1152
64#define MT9M032_ROW_START_DEF 60
65#define MT9M032_COLUMN_START 0x02
66#define MT9M032_COLUMN_START_MIN 0
67#define MT9M032_COLUMN_START_MAX 1600
68#define MT9M032_COLUMN_START_DEF 16
69#define MT9M032_ROW_SIZE 0x03
70#define MT9M032_ROW_SIZE_MIN 32
71#define MT9M032_ROW_SIZE_MAX 1152
72#define MT9M032_ROW_SIZE_DEF 1080
73#define MT9M032_COLUMN_SIZE 0x04
74#define MT9M032_COLUMN_SIZE_MIN 32
75#define MT9M032_COLUMN_SIZE_MAX 1600
76#define MT9M032_COLUMN_SIZE_DEF 1440
77#define MT9M032_HBLANK 0x05
78#define MT9M032_VBLANK 0x06
79#define MT9M032_VBLANK_MAX 0x7ff
80#define MT9M032_SHUTTER_WIDTH_HIGH 0x08
81#define MT9M032_SHUTTER_WIDTH_LOW 0x09
82#define MT9M032_SHUTTER_WIDTH_MIN 1
83#define MT9M032_SHUTTER_WIDTH_MAX 1048575
84#define MT9M032_SHUTTER_WIDTH_DEF 1943
85#define MT9M032_PIX_CLK_CTRL 0x0a
86#define MT9M032_PIX_CLK_CTRL_INV_PIXCLK 0x8000
87#define MT9M032_RESTART 0x0b
88#define MT9M032_RESET 0x0d
89#define MT9M032_PLL_CONFIG1 0x11
90#define MT9M032_PLL_CONFIG1_OUTDIV_MASK 0x3f
91#define MT9M032_PLL_CONFIG1_MUL_SHIFT 8
92#define MT9M032_READ_MODE1 0x1e
93#define MT9M032_READ_MODE2 0x20
94#define MT9M032_READ_MODE2_VFLIP_SHIFT 15
95#define MT9M032_READ_MODE2_HFLIP_SHIFT 14
96#define MT9M032_READ_MODE2_ROW_BLC 0x40
97#define MT9M032_GAIN_GREEN1 0x2b
98#define MT9M032_GAIN_BLUE 0x2c
99#define MT9M032_GAIN_RED 0x2d
100#define MT9M032_GAIN_GREEN2 0x2e
101
102/* write only */
103#define MT9M032_GAIN_ALL 0x35
104#define MT9M032_GAIN_DIGITAL_MASK 0x7f
105#define MT9M032_GAIN_DIGITAL_SHIFT 8
106#define MT9M032_GAIN_AMUL_SHIFT 6
107#define MT9M032_GAIN_ANALOG_MASK 0x3f
108#define MT9M032_FORMATTER1 0x9e
109#define MT9M032_FORMATTER2 0x9f
110#define MT9M032_FORMATTER2_DOUT_EN 0x1000
111#define MT9M032_FORMATTER2_PIXCLK_EN 0x2000
112
113/*
114 * The available MT9M032 datasheet is missing documentation for register 0x10
115 * MT9P031 seems to be close enough, so use constants from that datasheet for
116 * now.
117 * But keep the name MT9P031 to remind us, that this isn't really confirmed
118 * for this sensor.
119 */
120#define MT9P031_PLL_CONTROL 0x10
121#define MT9P031_PLL_CONTROL_PWROFF 0x0050
122#define MT9P031_PLL_CONTROL_PWRON 0x0051
123#define MT9P031_PLL_CONTROL_USEPLL 0x0052
124#define MT9P031_PLL_CONFIG2 0x11
125#define MT9P031_PLL_CONFIG2_P1_DIV_MASK 0x1f
126
127struct mt9m032 {
128 struct v4l2_subdev subdev;
129 struct media_pad pad;
130 struct mt9m032_platform_data *pdata;
131
132 unsigned int pix_clock;
133
134 struct v4l2_ctrl_handler ctrls;
135 struct {
136 struct v4l2_ctrl *hflip;
137 struct v4l2_ctrl *vflip;
138 };
139
140 struct mutex lock; /* Protects streaming, format, interval and crop */
141
142 bool streaming;
143
144 struct v4l2_mbus_framefmt format;
145 struct v4l2_rect crop;
146 struct v4l2_fract frame_interval;
147};
148
149#define to_mt9m032(sd) container_of(sd, struct mt9m032, subdev)
150#define to_dev(sensor) \
151 (&((struct i2c_client *)v4l2_get_subdevdata(&(sensor)->subdev))->dev)
152
153static int mt9m032_read(struct i2c_client *client, u8 reg)
154{
155 return i2c_smbus_read_word_swapped(client, reg);
156}
157
158static int mt9m032_write(struct i2c_client *client, u8 reg, const u16 data)
159{
160 return i2c_smbus_write_word_swapped(client, reg, data);
161}
162
163static u32 mt9m032_row_time(struct mt9m032 *sensor, unsigned int width)
164{
165 unsigned int effective_width;
166 u32 ns;
167
168 effective_width = width + 716; /* empirical value */
169 ns = div_u64(1000000000ULL * effective_width, sensor->pix_clock);
170 dev_dbg(to_dev(sensor), "MT9M032 line time: %u ns\n", ns);
171 return ns;
172}
173
174static int mt9m032_update_timing(struct mt9m032 *sensor,
175 struct v4l2_fract *interval)
176{
177 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
178 struct v4l2_rect *crop = &sensor->crop;
179 unsigned int min_vblank;
180 unsigned int vblank;
181 u32 row_time;
182
183 if (!interval)
184 interval = &sensor->frame_interval;
185
186 row_time = mt9m032_row_time(sensor, crop->width);
187
188 vblank = div_u64(1000000000ULL * interval->numerator,
189 (u64)row_time * interval->denominator)
190 - crop->height;
191
192 if (vblank > MT9M032_VBLANK_MAX) {
193 /* hardware limits to 11 bit values */
194 interval->denominator = 1000;
195 interval->numerator =
196 div_u64((crop->height + MT9M032_VBLANK_MAX) *
197 (u64)row_time * interval->denominator,
198 1000000000ULL);
199 vblank = div_u64(1000000000ULL * interval->numerator,
200 (u64)row_time * interval->denominator)
201 - crop->height;
202 }
203 /* enforce minimal 1.6ms blanking time. */
204 min_vblank = 1600000 / row_time;
205 vblank = clamp_t(unsigned int, vblank, min_vblank, MT9M032_VBLANK_MAX);
206
207 return mt9m032_write(client, MT9M032_VBLANK, vblank);
208}
209
210static int mt9m032_update_geom_timing(struct mt9m032 *sensor)
211{
212 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
213 int ret;
214
215 ret = mt9m032_write(client, MT9M032_COLUMN_SIZE,
216 sensor->crop.width - 1);
217 if (!ret)
218 ret = mt9m032_write(client, MT9M032_ROW_SIZE,
219 sensor->crop.height - 1);
220 if (!ret)
221 ret = mt9m032_write(client, MT9M032_COLUMN_START,
222 sensor->crop.left);
223 if (!ret)
224 ret = mt9m032_write(client, MT9M032_ROW_START,
225 sensor->crop.top);
226 if (!ret)
227 ret = mt9m032_update_timing(sensor, NULL);
228 return ret;
229}
230
231static int update_formatter2(struct mt9m032 *sensor, bool streaming)
232{
233 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
234 u16 reg_val = MT9M032_FORMATTER2_DOUT_EN
235 | 0x0070; /* parts reserved! */
236 /* possibly for changing to 14-bit mode */
237
238 if (streaming)
239 reg_val |= MT9M032_FORMATTER2_PIXCLK_EN; /* pixclock enable */
240
241 return mt9m032_write(client, MT9M032_FORMATTER2, reg_val);
242}
243
244static int mt9m032_setup_pll(struct mt9m032 *sensor)
245{
246 static const struct aptina_pll_limits limits = {
247 .ext_clock_min = 8000000,
248 .ext_clock_max = 16500000,
249 .int_clock_min = 2000000,
250 .int_clock_max = 24000000,
251 .out_clock_min = 322000000,
252 .out_clock_max = 693000000,
253 .pix_clock_max = 99000000,
254 .n_min = 1,
255 .n_max = 64,
256 .m_min = 16,
257 .m_max = 255,
258 .p1_min = 1,
259 .p1_max = 128,
260 };
261
262 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
263 struct mt9m032_platform_data *pdata = sensor->pdata;
264 struct aptina_pll pll;
265 int ret;
266
267 pll.ext_clock = pdata->ext_clock;
268 pll.pix_clock = pdata->pix_clock;
269
270 ret = aptina_pll_calculate(&client->dev, &limits, &pll);
271 if (ret < 0)
272 return ret;
273
274 sensor->pix_clock = pdata->pix_clock;
275
276 ret = mt9m032_write(client, MT9M032_PLL_CONFIG1,
277 (pll.m << MT9M032_PLL_CONFIG1_MUL_SHIFT)
278 | (pll.p1 - 1));
279 if (!ret)
280 ret = mt9m032_write(client, MT9P031_PLL_CONFIG2, pll.n - 1);
281 if (!ret)
282 ret = mt9m032_write(client, MT9P031_PLL_CONTROL,
283 MT9P031_PLL_CONTROL_PWRON |
284 MT9P031_PLL_CONTROL_USEPLL);
285 if (!ret) /* more reserved, Continuous, Master Mode */
286 ret = mt9m032_write(client, MT9M032_READ_MODE1, 0x8006);
287 if (!ret) /* Set 14-bit mode, select 7 divider */
288 ret = mt9m032_write(client, MT9M032_FORMATTER1, 0x111e);
289
290 return ret;
291}
292
293/* -----------------------------------------------------------------------------
294 * Subdev pad operations
295 */
296
297static int mt9m032_enum_mbus_code(struct v4l2_subdev *subdev,
298 struct v4l2_subdev_fh *fh,
299 struct v4l2_subdev_mbus_code_enum *code)
300{
301 if (code->index != 0)
302 return -EINVAL;
303
304 code->code = V4L2_MBUS_FMT_Y8_1X8;
305 return 0;
306}
307
308static int mt9m032_enum_frame_size(struct v4l2_subdev *subdev,
309 struct v4l2_subdev_fh *fh,
310 struct v4l2_subdev_frame_size_enum *fse)
311{
312 if (fse->index != 0 || fse->code != V4L2_MBUS_FMT_Y8_1X8)
313 return -EINVAL;
314
315 fse->min_width = MT9M032_COLUMN_SIZE_DEF;
316 fse->max_width = MT9M032_COLUMN_SIZE_DEF;
317 fse->min_height = MT9M032_ROW_SIZE_DEF;
318 fse->max_height = MT9M032_ROW_SIZE_DEF;
319
320 return 0;
321}
322
323/**
324 * __mt9m032_get_pad_crop() - get crop rect
325 * @sensor: pointer to the sensor struct
326 * @fh: file handle for getting the try crop rect from
327 * @which: select try or active crop rect
328 *
329 * Returns a pointer the current active or fh relative try crop rect
330 */
331static struct v4l2_rect *
332__mt9m032_get_pad_crop(struct mt9m032 *sensor, struct v4l2_subdev_fh *fh,
333 enum v4l2_subdev_format_whence which)
334{
335 switch (which) {
336 case V4L2_SUBDEV_FORMAT_TRY:
337 return v4l2_subdev_get_try_crop(fh, 0);
338 case V4L2_SUBDEV_FORMAT_ACTIVE:
339 return &sensor->crop;
340 default:
341 return NULL;
342 }
343}
344
345/**
346 * __mt9m032_get_pad_format() - get format
347 * @sensor: pointer to the sensor struct
348 * @fh: file handle for getting the try format from
349 * @which: select try or active format
350 *
351 * Returns a pointer the current active or fh relative try format
352 */
353static struct v4l2_mbus_framefmt *
354__mt9m032_get_pad_format(struct mt9m032 *sensor, struct v4l2_subdev_fh *fh,
355 enum v4l2_subdev_format_whence which)
356{
357 switch (which) {
358 case V4L2_SUBDEV_FORMAT_TRY:
359 return v4l2_subdev_get_try_format(fh, 0);
360 case V4L2_SUBDEV_FORMAT_ACTIVE:
361 return &sensor->format;
362 default:
363 return NULL;
364 }
365}
366
367static int mt9m032_get_pad_format(struct v4l2_subdev *subdev,
368 struct v4l2_subdev_fh *fh,
369 struct v4l2_subdev_format *fmt)
370{
371 struct mt9m032 *sensor = to_mt9m032(subdev);
372
373 mutex_lock(&sensor->lock);
374 fmt->format = *__mt9m032_get_pad_format(sensor, fh, fmt->which);
375 mutex_unlock(&sensor->lock);
376
377 return 0;
378}
379
380static int mt9m032_set_pad_format(struct v4l2_subdev *subdev,
381 struct v4l2_subdev_fh *fh,
382 struct v4l2_subdev_format *fmt)
383{
384 struct mt9m032 *sensor = to_mt9m032(subdev);
385 int ret;
386
387 mutex_lock(&sensor->lock);
388
389 if (sensor->streaming && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
390 ret = -EBUSY;
391 goto done;
392 }
393
394 /* Scaling is not supported, the format is thus fixed. */
395 ret = mt9m032_get_pad_format(subdev, fh, fmt);
396
397done:
398 mutex_lock(&sensor->lock);
399 return ret;
400}
401
402static int mt9m032_get_pad_crop(struct v4l2_subdev *subdev,
403 struct v4l2_subdev_fh *fh,
404 struct v4l2_subdev_crop *crop)
405{
406 struct mt9m032 *sensor = to_mt9m032(subdev);
407
408 mutex_lock(&sensor->lock);
409 crop->rect = *__mt9m032_get_pad_crop(sensor, fh, crop->which);
410 mutex_unlock(&sensor->lock);
411
412 return 0;
413}
414
415static int mt9m032_set_pad_crop(struct v4l2_subdev *subdev,
416 struct v4l2_subdev_fh *fh,
417 struct v4l2_subdev_crop *crop)
418{
419 struct mt9m032 *sensor = to_mt9m032(subdev);
420 struct v4l2_mbus_framefmt *format;
421 struct v4l2_rect *__crop;
422 struct v4l2_rect rect;
423 int ret = 0;
424
425 mutex_lock(&sensor->lock);
426
427 if (sensor->streaming && crop->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
428 ret = -EBUSY;
429 goto done;
430 }
431
432 /* Clamp the crop rectangle boundaries and align them to a multiple of 2
433 * pixels to ensure a GRBG Bayer pattern.
434 */
435 rect.left = clamp(ALIGN(crop->rect.left, 2), MT9M032_COLUMN_START_MIN,
436 MT9M032_COLUMN_START_MAX);
437 rect.top = clamp(ALIGN(crop->rect.top, 2), MT9M032_ROW_START_MIN,
438 MT9M032_ROW_START_MAX);
439 rect.width = clamp(ALIGN(crop->rect.width, 2), MT9M032_COLUMN_SIZE_MIN,
440 MT9M032_COLUMN_SIZE_MAX);
441 rect.height = clamp(ALIGN(crop->rect.height, 2), MT9M032_ROW_SIZE_MIN,
442 MT9M032_ROW_SIZE_MAX);
443
444 rect.width = min(rect.width, MT9M032_PIXEL_ARRAY_WIDTH - rect.left);
445 rect.height = min(rect.height, MT9M032_PIXEL_ARRAY_HEIGHT - rect.top);
446
447 __crop = __mt9m032_get_pad_crop(sensor, fh, crop->which);
448
449 if (rect.width != __crop->width || rect.height != __crop->height) {
450 /* Reset the output image size if the crop rectangle size has
451 * been modified.
452 */
453 format = __mt9m032_get_pad_format(sensor, fh, crop->which);
454 format->width = rect.width;
455 format->height = rect.height;
456 }
457
458 *__crop = rect;
459 crop->rect = rect;
460
461 if (crop->which == V4L2_SUBDEV_FORMAT_ACTIVE)
462 ret = mt9m032_update_geom_timing(sensor);
463
464done:
465 mutex_unlock(&sensor->lock);
466 return ret;
467}
468
469static int mt9m032_get_frame_interval(struct v4l2_subdev *subdev,
470 struct v4l2_subdev_frame_interval *fi)
471{
472 struct mt9m032 *sensor = to_mt9m032(subdev);
473
474 mutex_lock(&sensor->lock);
475 memset(fi, 0, sizeof(*fi));
476 fi->interval = sensor->frame_interval;
477 mutex_unlock(&sensor->lock);
478
479 return 0;
480}
481
482static int mt9m032_set_frame_interval(struct v4l2_subdev *subdev,
483 struct v4l2_subdev_frame_interval *fi)
484{
485 struct mt9m032 *sensor = to_mt9m032(subdev);
486 int ret;
487
488 mutex_lock(&sensor->lock);
489
490 if (sensor->streaming) {
491 ret = -EBUSY;
492 goto done;
493 }
494
495 /* Avoid divisions by 0. */
496 if (fi->interval.denominator == 0)
497 fi->interval.denominator = 1;
498
499 ret = mt9m032_update_timing(sensor, &fi->interval);
500 if (!ret)
501 sensor->frame_interval = fi->interval;
502
503done:
504 mutex_unlock(&sensor->lock);
505 return ret;
506}
507
508static int mt9m032_s_stream(struct v4l2_subdev *subdev, int streaming)
509{
510 struct mt9m032 *sensor = to_mt9m032(subdev);
511 int ret;
512
513 mutex_lock(&sensor->lock);
514 ret = update_formatter2(sensor, streaming);
515 if (!ret)
516 sensor->streaming = streaming;
517 mutex_unlock(&sensor->lock);
518
519 return ret;
520}
521
522/* -----------------------------------------------------------------------------
523 * V4L2 subdev core operations
524 */
525
526#ifdef CONFIG_VIDEO_ADV_DEBUG
527static int mt9m032_g_register(struct v4l2_subdev *sd,
528 struct v4l2_dbg_register *reg)
529{
530 struct mt9m032 *sensor = to_mt9m032(sd);
531 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
532 int val;
533
534 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
535 return -EINVAL;
536 if (reg->match.addr != client->addr)
537 return -ENODEV;
538
539 val = mt9m032_read(client, reg->reg);
540 if (val < 0)
541 return -EIO;
542
543 reg->size = 2;
544 reg->val = val;
545
546 return 0;
547}
548
549static int mt9m032_s_register(struct v4l2_subdev *sd,
550 struct v4l2_dbg_register *reg)
551{
552 struct mt9m032 *sensor = to_mt9m032(sd);
553 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
554
555 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
556 return -EINVAL;
557
558 if (reg->match.addr != client->addr)
559 return -ENODEV;
560
561 return mt9m032_write(client, reg->reg, reg->val);
562}
563#endif
564
565/* -----------------------------------------------------------------------------
566 * V4L2 subdev control operations
567 */
568
569static int update_read_mode2(struct mt9m032 *sensor, bool vflip, bool hflip)
570{
571 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
572 int reg_val = (vflip << MT9M032_READ_MODE2_VFLIP_SHIFT)
573 | (hflip << MT9M032_READ_MODE2_HFLIP_SHIFT)
574 | MT9M032_READ_MODE2_ROW_BLC
575 | 0x0007;
576
577 return mt9m032_write(client, MT9M032_READ_MODE2, reg_val);
578}
579
580static int mt9m032_set_gain(struct mt9m032 *sensor, s32 val)
581{
582 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
583 int digital_gain_val; /* in 1/8th (0..127) */
584 int analog_mul; /* 0 or 1 */
585 int analog_gain_val; /* in 1/16th. (0..63) */
586 u16 reg_val;
587
588 digital_gain_val = 51; /* from setup example */
589
590 if (val < 63) {
591 analog_mul = 0;
592 analog_gain_val = val;
593 } else {
594 analog_mul = 1;
595 analog_gain_val = val / 2;
596 }
597
598 /* a_gain = (1 + analog_mul) + (analog_gain_val + 1) / 16 */
599 /* overall_gain = a_gain * (1 + digital_gain_val / 8) */
600
601 reg_val = ((digital_gain_val & MT9M032_GAIN_DIGITAL_MASK)
602 << MT9M032_GAIN_DIGITAL_SHIFT)
603 | ((analog_mul & 1) << MT9M032_GAIN_AMUL_SHIFT)
604 | (analog_gain_val & MT9M032_GAIN_ANALOG_MASK);
605
606 return mt9m032_write(client, MT9M032_GAIN_ALL, reg_val);
607}
608
609static int mt9m032_try_ctrl(struct v4l2_ctrl *ctrl)
610{
611 if (ctrl->id == V4L2_CID_GAIN && ctrl->val >= 63) {
612 /* round because of multiplier used for values >= 63 */
613 ctrl->val &= ~1;
614 }
615
616 return 0;
617}
618
619static int mt9m032_set_ctrl(struct v4l2_ctrl *ctrl)
620{
621 struct mt9m032 *sensor =
622 container_of(ctrl->handler, struct mt9m032, ctrls);
623 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
624 int ret;
625
626 switch (ctrl->id) {
627 case V4L2_CID_GAIN:
628 return mt9m032_set_gain(sensor, ctrl->val);
629
630 case V4L2_CID_HFLIP:
631 /* case V4L2_CID_VFLIP: -- In the same cluster */
632 return update_read_mode2(sensor, sensor->vflip->val,
633 sensor->hflip->val);
634
635 case V4L2_CID_EXPOSURE:
636 ret = mt9m032_write(client, MT9M032_SHUTTER_WIDTH_HIGH,
637 (ctrl->val >> 16) & 0xffff);
638 if (ret < 0)
639 return ret;
640
641 return mt9m032_write(client, MT9M032_SHUTTER_WIDTH_LOW,
642 ctrl->val & 0xffff);
643 }
644
645 return 0;
646}
647
648static struct v4l2_ctrl_ops mt9m032_ctrl_ops = {
649 .s_ctrl = mt9m032_set_ctrl,
650 .try_ctrl = mt9m032_try_ctrl,
651};
652
653/* -------------------------------------------------------------------------- */
654
655static const struct v4l2_subdev_core_ops mt9m032_core_ops = {
656#ifdef CONFIG_VIDEO_ADV_DEBUG
657 .g_register = mt9m032_g_register,
658 .s_register = mt9m032_s_register,
659#endif
660};
661
662static const struct v4l2_subdev_video_ops mt9m032_video_ops = {
663 .s_stream = mt9m032_s_stream,
664 .g_frame_interval = mt9m032_get_frame_interval,
665 .s_frame_interval = mt9m032_set_frame_interval,
666};
667
668static const struct v4l2_subdev_pad_ops mt9m032_pad_ops = {
669 .enum_mbus_code = mt9m032_enum_mbus_code,
670 .enum_frame_size = mt9m032_enum_frame_size,
671 .get_fmt = mt9m032_get_pad_format,
672 .set_fmt = mt9m032_set_pad_format,
673 .set_crop = mt9m032_set_pad_crop,
674 .get_crop = mt9m032_get_pad_crop,
675};
676
677static const struct v4l2_subdev_ops mt9m032_ops = {
678 .core = &mt9m032_core_ops,
679 .video = &mt9m032_video_ops,
680 .pad = &mt9m032_pad_ops,
681};
682
683/* -----------------------------------------------------------------------------
684 * Driver initialization and probing
685 */
686
687static int mt9m032_probe(struct i2c_client *client,
688 const struct i2c_device_id *devid)
689{
690 struct i2c_adapter *adapter = client->adapter;
691 struct mt9m032 *sensor;
692 int chip_version;
693 int ret;
694
695 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
696 dev_warn(&client->dev,
697 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
698 return -EIO;
699 }
700
701 if (!client->dev.platform_data)
702 return -ENODEV;
703
704 sensor = kzalloc(sizeof(*sensor), GFP_KERNEL);
705 if (sensor == NULL)
706 return -ENOMEM;
707
708 mutex_init(&sensor->lock);
709
710 sensor->pdata = client->dev.platform_data;
711
712 v4l2_i2c_subdev_init(&sensor->subdev, client, &mt9m032_ops);
713 sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
714
715 chip_version = mt9m032_read(client, MT9M032_CHIP_VERSION);
716 if (chip_version != MT9M032_CHIP_VERSION_VALUE) {
717 dev_err(&client->dev, "MT9M032 not detected, wrong version "
718 "0x%04x\n", chip_version);
719 ret = -ENODEV;
720 goto error_sensor;
721 }
722
723 dev_info(&client->dev, "MT9M032 detected at address 0x%02x\n",
724 client->addr);
725
726 sensor->frame_interval.numerator = 1;
727 sensor->frame_interval.denominator = 30;
728
729 sensor->crop.left = MT9M032_COLUMN_START_DEF;
730 sensor->crop.top = MT9M032_ROW_START_DEF;
731 sensor->crop.width = MT9M032_COLUMN_SIZE_DEF;
732 sensor->crop.height = MT9M032_ROW_SIZE_DEF;
733
734 sensor->format.width = sensor->crop.width;
735 sensor->format.height = sensor->crop.height;
736 sensor->format.code = V4L2_MBUS_FMT_Y8_1X8;
737 sensor->format.field = V4L2_FIELD_NONE;
738 sensor->format.colorspace = V4L2_COLORSPACE_SRGB;
739
740 v4l2_ctrl_handler_init(&sensor->ctrls, 4);
741
742 v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
743 V4L2_CID_GAIN, 0, 127, 1, 64);
744
745 sensor->hflip = v4l2_ctrl_new_std(&sensor->ctrls,
746 &mt9m032_ctrl_ops,
747 V4L2_CID_HFLIP, 0, 1, 1, 0);
748 sensor->vflip = v4l2_ctrl_new_std(&sensor->ctrls,
749 &mt9m032_ctrl_ops,
750 V4L2_CID_VFLIP, 0, 1, 1, 0);
751
752 v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
753 V4L2_CID_EXPOSURE, MT9M032_SHUTTER_WIDTH_MIN,
754 MT9M032_SHUTTER_WIDTH_MAX, 1,
755 MT9M032_SHUTTER_WIDTH_DEF);
756
757 if (sensor->ctrls.error) {
758 ret = sensor->ctrls.error;
759 dev_err(&client->dev, "control initialization error %d\n", ret);
760 goto error_ctrl;
761 }
762
763 v4l2_ctrl_cluster(2, &sensor->hflip);
764
765 sensor->subdev.ctrl_handler = &sensor->ctrls;
766 sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
767 ret = media_entity_init(&sensor->subdev.entity, 1, &sensor->pad, 0);
768 if (ret < 0)
769 goto error_ctrl;
770
771 ret = mt9m032_write(client, MT9M032_RESET, 1); /* reset on */
772 if (ret < 0)
773 goto error_entity;
774 mt9m032_write(client, MT9M032_RESET, 0); /* reset off */
775 if (ret < 0)
776 goto error_entity;
777
778 ret = mt9m032_setup_pll(sensor);
779 if (ret < 0)
780 goto error_entity;
781 usleep_range(10000, 11000);
782
783 ret = v4l2_ctrl_handler_setup(&sensor->ctrls);
784 if (ret < 0)
785 goto error_entity;
786
787 /* SIZE */
788 ret = mt9m032_update_geom_timing(sensor);
789 if (ret < 0)
790 goto error_entity;
791
792 ret = mt9m032_write(client, 0x41, 0x0000); /* reserved !!! */
793 if (ret < 0)
794 goto error_entity;
795 ret = mt9m032_write(client, 0x42, 0x0003); /* reserved !!! */
796 if (ret < 0)
797 goto error_entity;
798 ret = mt9m032_write(client, 0x43, 0x0003); /* reserved !!! */
799 if (ret < 0)
800 goto error_entity;
801 ret = mt9m032_write(client, 0x7f, 0x0000); /* reserved !!! */
802 if (ret < 0)
803 goto error_entity;
804 if (sensor->pdata->invert_pixclock) {
805 ret = mt9m032_write(client, MT9M032_PIX_CLK_CTRL,
806 MT9M032_PIX_CLK_CTRL_INV_PIXCLK);
807 if (ret < 0)
808 goto error_entity;
809 }
810
811 ret = mt9m032_write(client, MT9M032_RESTART, 1); /* Restart on */
812 if (ret < 0)
813 goto error_entity;
814 msleep(100);
815 ret = mt9m032_write(client, MT9M032_RESTART, 0); /* Restart off */
816 if (ret < 0)
817 goto error_entity;
818 msleep(100);
819 ret = update_formatter2(sensor, false);
820 if (ret < 0)
821 goto error_entity;
822
823 return ret;
824
825error_entity:
826 media_entity_cleanup(&sensor->subdev.entity);
827error_ctrl:
828 v4l2_ctrl_handler_free(&sensor->ctrls);
829error_sensor:
830 mutex_destroy(&sensor->lock);
831 kfree(sensor);
832 return ret;
833}
834
835static int mt9m032_remove(struct i2c_client *client)
836{
837 struct v4l2_subdev *subdev = i2c_get_clientdata(client);
838 struct mt9m032 *sensor = to_mt9m032(subdev);
839
840 v4l2_device_unregister_subdev(&sensor->subdev);
841 v4l2_ctrl_handler_free(&sensor->ctrls);
842 media_entity_cleanup(&sensor->subdev.entity);
843 mutex_destroy(&sensor->lock);
844 kfree(sensor);
845 return 0;
846}
847
848static const struct i2c_device_id mt9m032_id_table[] = {
849 { MT9M032_NAME, 0 },
850 { }
851};
852
853MODULE_DEVICE_TABLE(i2c, mt9m032_id_table);
854
855static struct i2c_driver mt9m032_i2c_driver = {
856 .driver = {
857 .name = MT9M032_NAME,
858 },
859 .probe = mt9m032_probe,
860 .remove = mt9m032_remove,
861 .id_table = mt9m032_id_table,
862};
863
864module_i2c_driver(mt9m032_i2c_driver);
865
866MODULE_AUTHOR("Martin Hostettler <martin@neutronstar.dyndns.org>");
867MODULE_DESCRIPTION("MT9M032 camera sensor driver");
868MODULE_LICENSE("GPL v2");
Linux 6.x block layer and io_uring tree(s)