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Merge tag 'fbdev-fixes-for-3.5-2' of git://github.com/schandinat/linux-2.6
[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. */
b1e1179c
GL		 395 fmt->format = *__mt9m032_get_pad_format(sensor, fh, fmt->which);
396 ret = 0;
251cb88e
MH		 397
398done:
b1e1179c 399 mutex_unlock(&sensor->lock);
251cb88e
MH		 400 return ret;
401}
402
403static int mt9m032_get_pad_crop(struct v4l2_subdev *subdev,
404 struct v4l2_subdev_fh *fh,
405 struct v4l2_subdev_crop *crop)
406{
407 struct mt9m032 *sensor = to_mt9m032(subdev);
408
409 mutex_lock(&sensor->lock);
410 crop->rect = *__mt9m032_get_pad_crop(sensor, fh, crop->which);
411 mutex_unlock(&sensor->lock);
412
413 return 0;
414}
415
416static int mt9m032_set_pad_crop(struct v4l2_subdev *subdev,
417 struct v4l2_subdev_fh *fh,
418 struct v4l2_subdev_crop *crop)
419{
420 struct mt9m032 *sensor = to_mt9m032(subdev);
421 struct v4l2_mbus_framefmt *format;
422 struct v4l2_rect *__crop;
423 struct v4l2_rect rect;
424 int ret = 0;
425
426 mutex_lock(&sensor->lock);
427
428 if (sensor->streaming && crop->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
429 ret = -EBUSY;
430 goto done;
431 }
432
433 /* Clamp the crop rectangle boundaries and align them to a multiple of 2
434 * pixels to ensure a GRBG Bayer pattern.
435 */
436 rect.left = clamp(ALIGN(crop->rect.left, 2), MT9M032_COLUMN_START_MIN,
437 MT9M032_COLUMN_START_MAX);
438 rect.top = clamp(ALIGN(crop->rect.top, 2), MT9M032_ROW_START_MIN,
439 MT9M032_ROW_START_MAX);
440 rect.width = clamp(ALIGN(crop->rect.width, 2), MT9M032_COLUMN_SIZE_MIN,
441 MT9M032_COLUMN_SIZE_MAX);
442 rect.height = clamp(ALIGN(crop->rect.height, 2), MT9M032_ROW_SIZE_MIN,
443 MT9M032_ROW_SIZE_MAX);
444
445 rect.width = min(rect.width, MT9M032_PIXEL_ARRAY_WIDTH - rect.left);
446 rect.height = min(rect.height, MT9M032_PIXEL_ARRAY_HEIGHT - rect.top);
447
448 __crop = __mt9m032_get_pad_crop(sensor, fh, crop->which);
449
450 if (rect.width != __crop->width || rect.height != __crop->height) {
451 /* Reset the output image size if the crop rectangle size has
452 * been modified.
453 */
454 format = __mt9m032_get_pad_format(sensor, fh, crop->which);
455 format->width = rect.width;
456 format->height = rect.height;
457 }
458
459 *__crop = rect;
460 crop->rect = rect;
461
462 if (crop->which == V4L2_SUBDEV_FORMAT_ACTIVE)
463 ret = mt9m032_update_geom_timing(sensor);
464
465done:
466 mutex_unlock(&sensor->lock);
467 return ret;
468}
469
470static int mt9m032_get_frame_interval(struct v4l2_subdev *subdev,
471 struct v4l2_subdev_frame_interval *fi)
472{
473 struct mt9m032 *sensor = to_mt9m032(subdev);
474
475 mutex_lock(&sensor->lock);
476 memset(fi, 0, sizeof(*fi));
477 fi->interval = sensor->frame_interval;
478 mutex_unlock(&sensor->lock);
479
480 return 0;
481}
482
483static int mt9m032_set_frame_interval(struct v4l2_subdev *subdev,
484 struct v4l2_subdev_frame_interval *fi)
485{
486 struct mt9m032 *sensor = to_mt9m032(subdev);
487 int ret;
488
489 mutex_lock(&sensor->lock);
490
491 if (sensor->streaming) {
492 ret = -EBUSY;
493 goto done;
494 }
495
496 /* Avoid divisions by 0. */
497 if (fi->interval.denominator == 0)
498 fi->interval.denominator = 1;
499
500 ret = mt9m032_update_timing(sensor, &fi->interval);
501 if (!ret)
502 sensor->frame_interval = fi->interval;
503
504done:
505 mutex_unlock(&sensor->lock);
506 return ret;
507}
508
509static int mt9m032_s_stream(struct v4l2_subdev *subdev, int streaming)
510{
511 struct mt9m032 *sensor = to_mt9m032(subdev);
512 int ret;
513
514 mutex_lock(&sensor->lock);
515 ret = update_formatter2(sensor, streaming);
516 if (!ret)
517 sensor->streaming = streaming;
518 mutex_unlock(&sensor->lock);
519
520 return ret;
521}
522
523/* -----------------------------------------------------------------------------
524 * V4L2 subdev core operations
525 */
526
527#ifdef CONFIG_VIDEO_ADV_DEBUG
528static int mt9m032_g_register(struct v4l2_subdev *sd,
529 struct v4l2_dbg_register *reg)
530{
531 struct mt9m032 *sensor = to_mt9m032(sd);
532 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
533 int val;
534
535 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
536 return -EINVAL;
537 if (reg->match.addr != client->addr)
538 return -ENODEV;
539
540 val = mt9m032_read(client, reg->reg);
541 if (val < 0)
542 return -EIO;
543
544 reg->size = 2;
545 reg->val = val;
546
547 return 0;
548}
549
550static int mt9m032_s_register(struct v4l2_subdev *sd,
551 struct v4l2_dbg_register *reg)
552{
553 struct mt9m032 *sensor = to_mt9m032(sd);
554 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
555
556 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
557 return -EINVAL;
558
559 if (reg->match.addr != client->addr)
560 return -ENODEV;
561
562 return mt9m032_write(client, reg->reg, reg->val);
563}
564#endif
565
566/* -----------------------------------------------------------------------------
567 * V4L2 subdev control operations
568 */
569
570static int update_read_mode2(struct mt9m032 *sensor, bool vflip, bool hflip)
571{
572 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
573 int reg_val = (vflip << MT9M032_READ_MODE2_VFLIP_SHIFT)
574 | (hflip << MT9M032_READ_MODE2_HFLIP_SHIFT)
575 | MT9M032_READ_MODE2_ROW_BLC
576 | 0x0007;
577
578 return mt9m032_write(client, MT9M032_READ_MODE2, reg_val);
579}
580
581static int mt9m032_set_gain(struct mt9m032 *sensor, s32 val)
582{
583 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
584 int digital_gain_val; /* in 1/8th (0..127) */
585 int analog_mul; /* 0 or 1 */
586 int analog_gain_val; /* in 1/16th. (0..63) */
587 u16 reg_val;
588
589 digital_gain_val = 51; /* from setup example */
590
591 if (val < 63) {
592 analog_mul = 0;
593 analog_gain_val = val;
594 } else {
595 analog_mul = 1;
596 analog_gain_val = val / 2;
597 }
598
599 /* a_gain = (1 + analog_mul) + (analog_gain_val + 1) / 16 */
600 /* overall_gain = a_gain * (1 + digital_gain_val / 8) */
601
602 reg_val = ((digital_gain_val & MT9M032_GAIN_DIGITAL_MASK)
603 << MT9M032_GAIN_DIGITAL_SHIFT)
604 | ((analog_mul & 1) << MT9M032_GAIN_AMUL_SHIFT)
605 | (analog_gain_val & MT9M032_GAIN_ANALOG_MASK);
606
607 return mt9m032_write(client, MT9M032_GAIN_ALL, reg_val);
608}
609
610static int mt9m032_try_ctrl(struct v4l2_ctrl *ctrl)
611{
612 if (ctrl->id == V4L2_CID_GAIN && ctrl->val >= 63) {
613 /* round because of multiplier used for values >= 63 */
614 ctrl->val &= ~1;
615 }
616
617 return 0;
618}
619
620static int mt9m032_set_ctrl(struct v4l2_ctrl *ctrl)
621{
622 struct mt9m032 *sensor =
623 container_of(ctrl->handler, struct mt9m032, ctrls);
624 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
625 int ret;
626
627 switch (ctrl->id) {
628 case V4L2_CID_GAIN:
629 return mt9m032_set_gain(sensor, ctrl->val);
630
631 case V4L2_CID_HFLIP:
632 /* case V4L2_CID_VFLIP: -- In the same cluster */
633 return update_read_mode2(sensor, sensor->vflip->val,
634 sensor->hflip->val);
635
636 case V4L2_CID_EXPOSURE:
637 ret = mt9m032_write(client, MT9M032_SHUTTER_WIDTH_HIGH,
638 (ctrl->val >> 16) & 0xffff);
639 if (ret < 0)
640 return ret;
641
642 return mt9m032_write(client, MT9M032_SHUTTER_WIDTH_LOW,
643 ctrl->val & 0xffff);
644 }
645
646 return 0;
647}
648
649static struct v4l2_ctrl_ops mt9m032_ctrl_ops = {
650 .s_ctrl = mt9m032_set_ctrl,
651 .try_ctrl = mt9m032_try_ctrl,
652};
653
654/* -------------------------------------------------------------------------- */
655
656static const struct v4l2_subdev_core_ops mt9m032_core_ops = {
657#ifdef CONFIG_VIDEO_ADV_DEBUG
658 .g_register = mt9m032_g_register,
659 .s_register = mt9m032_s_register,
660#endif
661};
662
663static const struct v4l2_subdev_video_ops mt9m032_video_ops = {
664 .s_stream = mt9m032_s_stream,
665 .g_frame_interval = mt9m032_get_frame_interval,
666 .s_frame_interval = mt9m032_set_frame_interval,
667};
668
669static const struct v4l2_subdev_pad_ops mt9m032_pad_ops = {
670 .enum_mbus_code = mt9m032_enum_mbus_code,
671 .enum_frame_size = mt9m032_enum_frame_size,
672 .get_fmt = mt9m032_get_pad_format,
673 .set_fmt = mt9m032_set_pad_format,
674 .set_crop = mt9m032_set_pad_crop,
675 .get_crop = mt9m032_get_pad_crop,
676};
677
678static const struct v4l2_subdev_ops mt9m032_ops = {
679 .core = &mt9m032_core_ops,
680 .video = &mt9m032_video_ops,
681 .pad = &mt9m032_pad_ops,
682};
683
684/* -----------------------------------------------------------------------------
685 * Driver initialization and probing
686 */
687
688static int mt9m032_probe(struct i2c_client *client,
689 const struct i2c_device_id *devid)
690{
691 struct i2c_adapter *adapter = client->adapter;
692 struct mt9m032 *sensor;
693 int chip_version;
694 int ret;
695
696 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
697 dev_warn(&client->dev,
698 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
699 return -EIO;
700 }
701
702 if (!client->dev.platform_data)
703 return -ENODEV;
704
705 sensor = kzalloc(sizeof(*sensor), GFP_KERNEL);
706 if (sensor == NULL)
707 return -ENOMEM;
708
709 mutex_init(&sensor->lock);
710
711 sensor->pdata = client->dev.platform_data;
712
713 v4l2_i2c_subdev_init(&sensor->subdev, client, &mt9m032_ops);
714 sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
715
716 chip_version = mt9m032_read(client, MT9M032_CHIP_VERSION);
717 if (chip_version != MT9M032_CHIP_VERSION_VALUE) {
718 dev_err(&client->dev, "MT9M032 not detected, wrong version "
719 "0x%04x\n", chip_version);
720 ret = -ENODEV;
721 goto error_sensor;
722 }
723
724 dev_info(&client->dev, "MT9M032 detected at address 0x%02x\n",
725 client->addr);
726
727 sensor->frame_interval.numerator = 1;
728 sensor->frame_interval.denominator = 30;
729
730 sensor->crop.left = MT9M032_COLUMN_START_DEF;
731 sensor->crop.top = MT9M032_ROW_START_DEF;
732 sensor->crop.width = MT9M032_COLUMN_SIZE_DEF;
733 sensor->crop.height = MT9M032_ROW_SIZE_DEF;
734
735 sensor->format.width = sensor->crop.width;
736 sensor->format.height = sensor->crop.height;
737 sensor->format.code = V4L2_MBUS_FMT_Y8_1X8;
738 sensor->format.field = V4L2_FIELD_NONE;
739 sensor->format.colorspace = V4L2_COLORSPACE_SRGB;
740
741 v4l2_ctrl_handler_init(&sensor->ctrls, 4);
742
743 v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
744 V4L2_CID_GAIN, 0, 127, 1, 64);
745
746 sensor->hflip = v4l2_ctrl_new_std(&sensor->ctrls,
747 &mt9m032_ctrl_ops,
748 V4L2_CID_HFLIP, 0, 1, 1, 0);
749 sensor->vflip = v4l2_ctrl_new_std(&sensor->ctrls,
750 &mt9m032_ctrl_ops,
751 V4L2_CID_VFLIP, 0, 1, 1, 0);
752
753 v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
754 V4L2_CID_EXPOSURE, MT9M032_SHUTTER_WIDTH_MIN,
755 MT9M032_SHUTTER_WIDTH_MAX, 1,
756 MT9M032_SHUTTER_WIDTH_DEF);
757
758 if (sensor->ctrls.error) {
759 ret = sensor->ctrls.error;
760 dev_err(&client->dev, "control initialization error %d\n", ret);
761 goto error_ctrl;
762 }
763
764 v4l2_ctrl_cluster(2, &sensor->hflip);
765
766 sensor->subdev.ctrl_handler = &sensor->ctrls;
767 sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
768 ret = media_entity_init(&sensor->subdev.entity, 1, &sensor->pad, 0);
769 if (ret < 0)
770 goto error_ctrl;
771
772 ret = mt9m032_write(client, MT9M032_RESET, 1); /* reset on */
773 if (ret < 0)
774 goto error_entity;
775 mt9m032_write(client, MT9M032_RESET, 0); /* reset off */
776 if (ret < 0)
777 goto error_entity;
778
779 ret = mt9m032_setup_pll(sensor);
780 if (ret < 0)
781 goto error_entity;
782 usleep_range(10000, 11000);
783
784 ret = v4l2_ctrl_handler_setup(&sensor->ctrls);
785 if (ret < 0)
786 goto error_entity;
787
788 /* SIZE */
789 ret = mt9m032_update_geom_timing(sensor);
790 if (ret < 0)
791 goto error_entity;
792
793 ret = mt9m032_write(client, 0x41, 0x0000); /* reserved !!! */
794 if (ret < 0)
795 goto error_entity;
796 ret = mt9m032_write(client, 0x42, 0x0003); /* reserved !!! */
797 if (ret < 0)
798 goto error_entity;
799 ret = mt9m032_write(client, 0x43, 0x0003); /* reserved !!! */
800 if (ret < 0)
801 goto error_entity;
802 ret = mt9m032_write(client, 0x7f, 0x0000); /* reserved !!! */
803 if (ret < 0)
804 goto error_entity;
805 if (sensor->pdata->invert_pixclock) {
806 ret = mt9m032_write(client, MT9M032_PIX_CLK_CTRL,
807 MT9M032_PIX_CLK_CTRL_INV_PIXCLK);
808 if (ret < 0)
809 goto error_entity;
810 }
811
812 ret = mt9m032_write(client, MT9M032_RESTART, 1); /* Restart on */
813 if (ret < 0)
814 goto error_entity;
815 msleep(100);
816 ret = mt9m032_write(client, MT9M032_RESTART, 0); /* Restart off */
817 if (ret < 0)
818 goto error_entity;
819 msleep(100);
820 ret = update_formatter2(sensor, false);
821 if (ret < 0)
822 goto error_entity;
823
824 return ret;
825
826error_entity:
827 media_entity_cleanup(&sensor->subdev.entity);
828error_ctrl:
829 v4l2_ctrl_handler_free(&sensor->ctrls);
830error_sensor:
831 mutex_destroy(&sensor->lock);
832 kfree(sensor);
833 return ret;
834}
835
836static int mt9m032_remove(struct i2c_client *client)
837{
838 struct v4l2_subdev *subdev = i2c_get_clientdata(client);
839 struct mt9m032 *sensor = to_mt9m032(subdev);
840
b22b9f32 841 v4l2_device_unregister_subdev(subdev);
251cb88e 842 v4l2_ctrl_handler_free(&sensor->ctrls);
b22b9f32 843 media_entity_cleanup(&subdev->entity);
251cb88e
MH		 844 mutex_destroy(&sensor->lock);
845 kfree(sensor);
846 return 0;
847}
848
849static const struct i2c_device_id mt9m032_id_table[] = {
850 { MT9M032_NAME, 0 },
851 { }
852};
853
854MODULE_DEVICE_TABLE(i2c, mt9m032_id_table);
855
856static struct i2c_driver mt9m032_i2c_driver = {
857 .driver = {
858 .name = MT9M032_NAME,
859 },
860 .probe = mt9m032_probe,
861 .remove = mt9m032_remove,
862 .id_table = mt9m032_id_table,
863};
864
865module_i2c_driver(mt9m032_i2c_driver);
866
867MODULE_AUTHOR("Martin Hostettler <martin@neutronstar.dyndns.org>");
868MODULE_DESCRIPTION("MT9M032 camera sensor driver");
869MODULE_LICENSE("GPL v2");
Linux 6.x block layer and io_uring tree(s)