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V4L/DVB (11325): soc-camera: fix breakage caused by 1fa5ae857bb14f6046205171d98506d81...
[deliverable/linux.git] / drivers / media / video / mt9m001.c
1 /*
2 * Driver for MT9M001 CMOS Image Sensor from Micron
3 *
4 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <linux/videodev2.h>
12 #include <linux/slab.h>
13 #include <linux/i2c.h>
14 #include <linux/log2.h>
15
16 #include <media/v4l2-common.h>
17 #include <media/v4l2-chip-ident.h>
18 #include <media/soc_camera.h>
19
20 /* mt9m001 i2c address 0x5d
21 * The platform has to define i2c_board_info
22 * and call i2c_register_board_info() */
23
24 /* mt9m001 selected register addresses */
25 #define MT9M001_CHIP_VERSION 0x00
26 #define MT9M001_ROW_START 0x01
27 #define MT9M001_COLUMN_START 0x02
28 #define MT9M001_WINDOW_HEIGHT 0x03
29 #define MT9M001_WINDOW_WIDTH 0x04
30 #define MT9M001_HORIZONTAL_BLANKING 0x05
31 #define MT9M001_VERTICAL_BLANKING 0x06
32 #define MT9M001_OUTPUT_CONTROL 0x07
33 #define MT9M001_SHUTTER_WIDTH 0x09
34 #define MT9M001_FRAME_RESTART 0x0b
35 #define MT9M001_SHUTTER_DELAY 0x0c
36 #define MT9M001_RESET 0x0d
37 #define MT9M001_READ_OPTIONS1 0x1e
38 #define MT9M001_READ_OPTIONS2 0x20
39 #define MT9M001_GLOBAL_GAIN 0x35
40 #define MT9M001_CHIP_ENABLE 0xF1
41
42 static const struct soc_camera_data_format mt9m001_colour_formats[] = {
43 /* Order important: first natively supported,
44 * second supported with a GPIO extender */
45 {
46 .name = "Bayer (sRGB) 10 bit",
47 .depth = 10,
48 .fourcc = V4L2_PIX_FMT_SBGGR16,
49 .colorspace = V4L2_COLORSPACE_SRGB,
50 }, {
51 .name = "Bayer (sRGB) 8 bit",
52 .depth = 8,
53 .fourcc = V4L2_PIX_FMT_SBGGR8,
54 .colorspace = V4L2_COLORSPACE_SRGB,
55 }
56 };
57
58 static const struct soc_camera_data_format mt9m001_monochrome_formats[] = {
59 /* Order important - see above */
60 {
61 .name = "Monochrome 10 bit",
62 .depth = 10,
63 .fourcc = V4L2_PIX_FMT_Y16,
64 }, {
65 .name = "Monochrome 8 bit",
66 .depth = 8,
67 .fourcc = V4L2_PIX_FMT_GREY,
68 },
69 };
70
71 struct mt9m001 {
72 struct i2c_client *client;
73 struct soc_camera_device icd;
74 int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */
75 unsigned char autoexposure;
76 };
77
78 static int reg_read(struct soc_camera_device *icd, const u8 reg)
79 {
80 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
81 struct i2c_client *client = mt9m001->client;
82 s32 data = i2c_smbus_read_word_data(client, reg);
83 return data < 0 ? data : swab16(data);
84 }
85
86 static int reg_write(struct soc_camera_device *icd, const u8 reg,
87 const u16 data)
88 {
89 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
90 return i2c_smbus_write_word_data(mt9m001->client, reg, swab16(data));
91 }
92
93 static int reg_set(struct soc_camera_device *icd, const u8 reg,
94 const u16 data)
95 {
96 int ret;
97
98 ret = reg_read(icd, reg);
99 if (ret < 0)
100 return ret;
101 return reg_write(icd, reg, ret | data);
102 }
103
104 static int reg_clear(struct soc_camera_device *icd, const u8 reg,
105 const u16 data)
106 {
107 int ret;
108
109 ret = reg_read(icd, reg);
110 if (ret < 0)
111 return ret;
112 return reg_write(icd, reg, ret & ~data);
113 }
114
115 static int mt9m001_init(struct soc_camera_device *icd)
116 {
117 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
118 struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
119 int ret;
120
121 dev_dbg(icd->vdev->parent, "%s\n", __func__);
122
123 if (icl->power) {
124 ret = icl->power(&mt9m001->client->dev, 1);
125 if (ret < 0) {
126 dev_err(icd->vdev->parent,
127 "Platform failed to power-on the camera.\n");
128 return ret;
129 }
130 }
131
132 /* The camera could have been already on, we reset it additionally */
133 if (icl->reset)
134 ret = icl->reset(&mt9m001->client->dev);
135 else
136 ret = -ENODEV;
137
138 if (ret < 0) {
139 /* Either no platform reset, or platform reset failed */
140 ret = reg_write(icd, MT9M001_RESET, 1);
141 if (!ret)
142 ret = reg_write(icd, MT9M001_RESET, 0);
143 }
144 /* Disable chip, synchronous option update */
145 if (!ret)
146 ret = reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
147
148 return ret;
149 }
150
151 static int mt9m001_release(struct soc_camera_device *icd)
152 {
153 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
154 struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
155
156 /* Disable the chip */
157 reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
158
159 if (icl->power)
160 icl->power(&mt9m001->client->dev, 0);
161
162 return 0;
163 }
164
165 static int mt9m001_start_capture(struct soc_camera_device *icd)
166 {
167 /* Switch to master "normal" mode */
168 if (reg_write(icd, MT9M001_OUTPUT_CONTROL, 2) < 0)
169 return -EIO;
170 return 0;
171 }
172
173 static int mt9m001_stop_capture(struct soc_camera_device *icd)
174 {
175 /* Stop sensor readout */
176 if (reg_write(icd, MT9M001_OUTPUT_CONTROL, 0) < 0)
177 return -EIO;
178 return 0;
179 }
180
181 static int mt9m001_set_bus_param(struct soc_camera_device *icd,
182 unsigned long flags)
183 {
184 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
185 struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
186 unsigned long width_flag = flags & SOCAM_DATAWIDTH_MASK;
187
188 /* Only one width bit may be set */
189 if (!is_power_of_2(width_flag))
190 return -EINVAL;
191
192 if (icl->set_bus_param)
193 return icl->set_bus_param(icl, width_flag);
194
195 /*
196 * Without board specific bus width settings we only support the
197 * sensors native bus width
198 */
199 if (width_flag == SOCAM_DATAWIDTH_10)
200 return 0;
201
202 return -EINVAL;
203 }
204
205 static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd)
206 {
207 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
208 struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
209 /* MT9M001 has all capture_format parameters fixed */
210 unsigned long flags = SOCAM_PCLK_SAMPLE_RISING |
211 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH |
212 SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER;
213
214 if (icl->query_bus_param)
215 flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK;
216 else
217 flags |= SOCAM_DATAWIDTH_10;
218
219 return soc_camera_apply_sensor_flags(icl, flags);
220 }
221
222 static int mt9m001_set_crop(struct soc_camera_device *icd,
223 struct v4l2_rect *rect)
224 {
225 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
226 int ret;
227 const u16 hblank = 9, vblank = 25;
228
229 /* Blanking and start values - default... */
230 ret = reg_write(icd, MT9M001_HORIZONTAL_BLANKING, hblank);
231 if (!ret)
232 ret = reg_write(icd, MT9M001_VERTICAL_BLANKING, vblank);
233
234 /* The caller provides a supported format, as verified per
235 * call to icd->try_fmt() */
236 if (!ret)
237 ret = reg_write(icd, MT9M001_COLUMN_START, rect->left);
238 if (!ret)
239 ret = reg_write(icd, MT9M001_ROW_START, rect->top);
240 if (!ret)
241 ret = reg_write(icd, MT9M001_WINDOW_WIDTH, rect->width - 1);
242 if (!ret)
243 ret = reg_write(icd, MT9M001_WINDOW_HEIGHT,
244 rect->height + icd->y_skip_top - 1);
245 if (!ret && mt9m001->autoexposure) {
246 ret = reg_write(icd, MT9M001_SHUTTER_WIDTH,
247 rect->height + icd->y_skip_top + vblank);
248 if (!ret) {
249 const struct v4l2_queryctrl *qctrl =
250 soc_camera_find_qctrl(icd->ops,
251 V4L2_CID_EXPOSURE);
252 icd->exposure = (524 + (rect->height + icd->y_skip_top +
253 vblank - 1) *
254 (qctrl->maximum - qctrl->minimum)) /
255 1048 + qctrl->minimum;
256 }
257 }
258
259 return ret;
260 }
261
262 static int mt9m001_set_fmt(struct soc_camera_device *icd,
263 struct v4l2_format *f)
264 {
265 struct v4l2_rect rect = {
266 .left = icd->x_current,
267 .top = icd->y_current,
268 .width = f->fmt.pix.width,
269 .height = f->fmt.pix.height,
270 };
271
272 /* No support for scaling so far, just crop. TODO: use skipping */
273 return mt9m001_set_crop(icd, &rect);
274 }
275
276 static int mt9m001_try_fmt(struct soc_camera_device *icd,
277 struct v4l2_format *f)
278 {
279 struct v4l2_pix_format *pix = &f->fmt.pix;
280
281 if (pix->height < 32 + icd->y_skip_top)
282 pix->height = 32 + icd->y_skip_top;
283 if (pix->height > 1024 + icd->y_skip_top)
284 pix->height = 1024 + icd->y_skip_top;
285 if (pix->width < 48)
286 pix->width = 48;
287 if (pix->width > 1280)
288 pix->width = 1280;
289 pix->width &= ~0x01; /* has to be even, unsure why was ~3 */
290
291 return 0;
292 }
293
294 static int mt9m001_get_chip_id(struct soc_camera_device *icd,
295 struct v4l2_dbg_chip_ident *id)
296 {
297 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
298
299 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
300 return -EINVAL;
301
302 if (id->match.addr != mt9m001->client->addr)
303 return -ENODEV;
304
305 id->ident = mt9m001->model;
306 id->revision = 0;
307
308 return 0;
309 }
310
311 #ifdef CONFIG_VIDEO_ADV_DEBUG
312 static int mt9m001_get_register(struct soc_camera_device *icd,
313 struct v4l2_dbg_register *reg)
314 {
315 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
316
317 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
318 return -EINVAL;
319
320 if (reg->match.addr != mt9m001->client->addr)
321 return -ENODEV;
322
323 reg->size = 2;
324 reg->val = reg_read(icd, reg->reg);
325
326 if (reg->val > 0xffff)
327 return -EIO;
328
329 return 0;
330 }
331
332 static int mt9m001_set_register(struct soc_camera_device *icd,
333 struct v4l2_dbg_register *reg)
334 {
335 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
336
337 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
338 return -EINVAL;
339
340 if (reg->match.addr != mt9m001->client->addr)
341 return -ENODEV;
342
343 if (reg_write(icd, reg->reg, reg->val) < 0)
344 return -EIO;
345
346 return 0;
347 }
348 #endif
349
350 static const struct v4l2_queryctrl mt9m001_controls[] = {
351 {
352 .id = V4L2_CID_VFLIP,
353 .type = V4L2_CTRL_TYPE_BOOLEAN,
354 .name = "Flip Vertically",
355 .minimum = 0,
356 .maximum = 1,
357 .step = 1,
358 .default_value = 0,
359 }, {
360 .id = V4L2_CID_GAIN,
361 .type = V4L2_CTRL_TYPE_INTEGER,
362 .name = "Gain",
363 .minimum = 0,
364 .maximum = 127,
365 .step = 1,
366 .default_value = 64,
367 .flags = V4L2_CTRL_FLAG_SLIDER,
368 }, {
369 .id = V4L2_CID_EXPOSURE,
370 .type = V4L2_CTRL_TYPE_INTEGER,
371 .name = "Exposure",
372 .minimum = 1,
373 .maximum = 255,
374 .step = 1,
375 .default_value = 255,
376 .flags = V4L2_CTRL_FLAG_SLIDER,
377 }, {
378 .id = V4L2_CID_EXPOSURE_AUTO,
379 .type = V4L2_CTRL_TYPE_BOOLEAN,
380 .name = "Automatic Exposure",
381 .minimum = 0,
382 .maximum = 1,
383 .step = 1,
384 .default_value = 1,
385 }
386 };
387
388 static int mt9m001_video_probe(struct soc_camera_device *);
389 static void mt9m001_video_remove(struct soc_camera_device *);
390 static int mt9m001_get_control(struct soc_camera_device *, struct v4l2_control *);
391 static int mt9m001_set_control(struct soc_camera_device *, struct v4l2_control *);
392
393 static struct soc_camera_ops mt9m001_ops = {
394 .owner = THIS_MODULE,
395 .probe = mt9m001_video_probe,
396 .remove = mt9m001_video_remove,
397 .init = mt9m001_init,
398 .release = mt9m001_release,
399 .start_capture = mt9m001_start_capture,
400 .stop_capture = mt9m001_stop_capture,
401 .set_crop = mt9m001_set_crop,
402 .set_fmt = mt9m001_set_fmt,
403 .try_fmt = mt9m001_try_fmt,
404 .set_bus_param = mt9m001_set_bus_param,
405 .query_bus_param = mt9m001_query_bus_param,
406 .controls = mt9m001_controls,
407 .num_controls = ARRAY_SIZE(mt9m001_controls),
408 .get_control = mt9m001_get_control,
409 .set_control = mt9m001_set_control,
410 .get_chip_id = mt9m001_get_chip_id,
411 #ifdef CONFIG_VIDEO_ADV_DEBUG
412 .get_register = mt9m001_get_register,
413 .set_register = mt9m001_set_register,
414 #endif
415 };
416
417 static int mt9m001_get_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
418 {
419 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
420 int data;
421
422 switch (ctrl->id) {
423 case V4L2_CID_VFLIP:
424 data = reg_read(icd, MT9M001_READ_OPTIONS2);
425 if (data < 0)
426 return -EIO;
427 ctrl->value = !!(data & 0x8000);
428 break;
429 case V4L2_CID_EXPOSURE_AUTO:
430 ctrl->value = mt9m001->autoexposure;
431 break;
432 }
433 return 0;
434 }
435
436 static int mt9m001_set_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
437 {
438 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
439 const struct v4l2_queryctrl *qctrl;
440 int data;
441
442 qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id);
443
444 if (!qctrl)
445 return -EINVAL;
446
447 switch (ctrl->id) {
448 case V4L2_CID_VFLIP:
449 if (ctrl->value)
450 data = reg_set(icd, MT9M001_READ_OPTIONS2, 0x8000);
451 else
452 data = reg_clear(icd, MT9M001_READ_OPTIONS2, 0x8000);
453 if (data < 0)
454 return -EIO;
455 break;
456 case V4L2_CID_GAIN:
457 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
458 return -EINVAL;
459 /* See Datasheet Table 7, Gain settings. */
460 if (ctrl->value <= qctrl->default_value) {
461 /* Pack it into 0..1 step 0.125, register values 0..8 */
462 unsigned long range = qctrl->default_value - qctrl->minimum;
463 data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range;
464
465 dev_dbg(&icd->dev, "Setting gain %d\n", data);
466 data = reg_write(icd, MT9M001_GLOBAL_GAIN, data);
467 if (data < 0)
468 return -EIO;
469 } else {
470 /* Pack it into 1.125..15 variable step, register values 9..67 */
471 /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
472 unsigned long range = qctrl->maximum - qctrl->default_value - 1;
473 unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
474 111 + range / 2) / range + 9;
475
476 if (gain <= 32)
477 data = gain;
478 else if (gain <= 64)
479 data = ((gain - 32) * 16 + 16) / 32 + 80;
480 else
481 data = ((gain - 64) * 7 + 28) / 56 + 96;
482
483 dev_dbg(&icd->dev, "Setting gain from %d to %d\n",
484 reg_read(icd, MT9M001_GLOBAL_GAIN), data);
485 data = reg_write(icd, MT9M001_GLOBAL_GAIN, data);
486 if (data < 0)
487 return -EIO;
488 }
489
490 /* Success */
491 icd->gain = ctrl->value;
492 break;
493 case V4L2_CID_EXPOSURE:
494 /* mt9m001 has maximum == default */
495 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
496 return -EINVAL;
497 else {
498 unsigned long range = qctrl->maximum - qctrl->minimum;
499 unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 +
500 range / 2) / range + 1;
501
502 dev_dbg(&icd->dev, "Setting shutter width from %d to %lu\n",
503 reg_read(icd, MT9M001_SHUTTER_WIDTH), shutter);
504 if (reg_write(icd, MT9M001_SHUTTER_WIDTH, shutter) < 0)
505 return -EIO;
506 icd->exposure = ctrl->value;
507 mt9m001->autoexposure = 0;
508 }
509 break;
510 case V4L2_CID_EXPOSURE_AUTO:
511 if (ctrl->value) {
512 const u16 vblank = 25;
513 if (reg_write(icd, MT9M001_SHUTTER_WIDTH, icd->height +
514 icd->y_skip_top + vblank) < 0)
515 return -EIO;
516 qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
517 icd->exposure = (524 + (icd->height + icd->y_skip_top + vblank - 1) *
518 (qctrl->maximum - qctrl->minimum)) /
519 1048 + qctrl->minimum;
520 mt9m001->autoexposure = 1;
521 } else
522 mt9m001->autoexposure = 0;
523 break;
524 }
525 return 0;
526 }
527
528 /* Interface active, can use i2c. If it fails, it can indeed mean, that
529 * this wasn't our capture interface, so, we wait for the right one */
530 static int mt9m001_video_probe(struct soc_camera_device *icd)
531 {
532 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
533 struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
534 s32 data;
535 int ret;
536 unsigned long flags;
537
538 /* We must have a parent by now. And it cannot be a wrong one.
539 * So this entire test is completely redundant. */
540 if (!icd->dev.parent ||
541 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
542 return -ENODEV;
543
544 /* Enable the chip */
545 data = reg_write(icd, MT9M001_CHIP_ENABLE, 1);
546 dev_dbg(&icd->dev, "write: %d\n", data);
547
548 /* Read out the chip version register */
549 data = reg_read(icd, MT9M001_CHIP_VERSION);
550
551 /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */
552 switch (data) {
553 case 0x8411:
554 case 0x8421:
555 mt9m001->model = V4L2_IDENT_MT9M001C12ST;
556 icd->formats = mt9m001_colour_formats;
557 break;
558 case 0x8431:
559 mt9m001->model = V4L2_IDENT_MT9M001C12STM;
560 icd->formats = mt9m001_monochrome_formats;
561 break;
562 default:
563 ret = -ENODEV;
564 dev_err(&icd->dev,
565 "No MT9M001 chip detected, register read %x\n", data);
566 goto ei2c;
567 }
568
569 icd->num_formats = 0;
570
571 /*
572 * This is a 10bit sensor, so by default we only allow 10bit.
573 * The platform may support different bus widths due to
574 * different routing of the data lines.
575 */
576 if (icl->query_bus_param)
577 flags = icl->query_bus_param(icl);
578 else
579 flags = SOCAM_DATAWIDTH_10;
580
581 if (flags & SOCAM_DATAWIDTH_10)
582 icd->num_formats++;
583 else
584 icd->formats++;
585
586 if (flags & SOCAM_DATAWIDTH_8)
587 icd->num_formats++;
588
589 dev_info(&icd->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
590 data == 0x8431 ? "C12STM" : "C12ST");
591
592 /* Now that we know the model, we can start video */
593 ret = soc_camera_video_start(icd);
594 if (ret)
595 goto eisis;
596
597 return 0;
598
599 eisis:
600 ei2c:
601 return ret;
602 }
603
604 static void mt9m001_video_remove(struct soc_camera_device *icd)
605 {
606 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
607
608 dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9m001->client->addr,
609 icd->dev.parent, icd->vdev);
610 soc_camera_video_stop(icd);
611 }
612
613 static int mt9m001_probe(struct i2c_client *client,
614 const struct i2c_device_id *did)
615 {
616 struct mt9m001 *mt9m001;
617 struct soc_camera_device *icd;
618 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
619 struct soc_camera_link *icl = client->dev.platform_data;
620 int ret;
621
622 if (!icl) {
623 dev_err(&client->dev, "MT9M001 driver needs platform data\n");
624 return -EINVAL;
625 }
626
627 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
628 dev_warn(&adapter->dev,
629 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
630 return -EIO;
631 }
632
633 mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL);
634 if (!mt9m001)
635 return -ENOMEM;
636
637 mt9m001->client = client;
638 i2c_set_clientdata(client, mt9m001);
639
640 /* Second stage probe - when a capture adapter is there */
641 icd = &mt9m001->icd;
642 icd->ops = &mt9m001_ops;
643 icd->control = &client->dev;
644 icd->x_min = 20;
645 icd->y_min = 12;
646 icd->x_current = 20;
647 icd->y_current = 12;
648 icd->width_min = 48;
649 icd->width_max = 1280;
650 icd->height_min = 32;
651 icd->height_max = 1024;
652 icd->y_skip_top = 1;
653 icd->iface = icl->bus_id;
654 /* Simulated autoexposure. If enabled, we calculate shutter width
655 * ourselves in the driver based on vertical blanking and frame width */
656 mt9m001->autoexposure = 1;
657
658 ret = soc_camera_device_register(icd);
659 if (ret)
660 goto eisdr;
661
662 return 0;
663
664 eisdr:
665 kfree(mt9m001);
666 return ret;
667 }
668
669 static int mt9m001_remove(struct i2c_client *client)
670 {
671 struct mt9m001 *mt9m001 = i2c_get_clientdata(client);
672
673 soc_camera_device_unregister(&mt9m001->icd);
674 kfree(mt9m001);
675
676 return 0;
677 }
678
679 static const struct i2c_device_id mt9m001_id[] = {
680 { "mt9m001", 0 },
681 { }
682 };
683 MODULE_DEVICE_TABLE(i2c, mt9m001_id);
684
685 static struct i2c_driver mt9m001_i2c_driver = {
686 .driver = {
687 .name = "mt9m001",
688 },
689 .probe = mt9m001_probe,
690 .remove = mt9m001_remove,
691 .id_table = mt9m001_id,
692 };
693
694 static int __init mt9m001_mod_init(void)
695 {
696 return i2c_add_driver(&mt9m001_i2c_driver);
697 }
698
699 static void __exit mt9m001_mod_exit(void)
700 {
701 i2c_del_driver(&mt9m001_i2c_driver);
702 }
703
704 module_init(mt9m001_mod_init);
705 module_exit(mt9m001_mod_exit);
706
707 MODULE_DESCRIPTION("Micron MT9M001 Camera driver");
708 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
709 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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