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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-subdev.h>
17#include <media/v4l2-chip-ident.h>
18#include <media/soc_camera.h>
19
20
21
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24
25
26
27#define MT9M001_CHIP_VERSION 0x00
28#define MT9M001_ROW_START 0x01
29#define MT9M001_COLUMN_START 0x02
30#define MT9M001_WINDOW_HEIGHT 0x03
31#define MT9M001_WINDOW_WIDTH 0x04
32#define MT9M001_HORIZONTAL_BLANKING 0x05
33#define MT9M001_VERTICAL_BLANKING 0x06
34#define MT9M001_OUTPUT_CONTROL 0x07
35#define MT9M001_SHUTTER_WIDTH 0x09
36#define MT9M001_FRAME_RESTART 0x0b
37#define MT9M001_SHUTTER_DELAY 0x0c
38#define MT9M001_RESET 0x0d
39#define MT9M001_READ_OPTIONS1 0x1e
40#define MT9M001_READ_OPTIONS2 0x20
41#define MT9M001_GLOBAL_GAIN 0x35
42#define MT9M001_CHIP_ENABLE 0xF1
43
44#define MT9M001_MAX_WIDTH 1280
45#define MT9M001_MAX_HEIGHT 1024
46#define MT9M001_MIN_WIDTH 48
47#define MT9M001_MIN_HEIGHT 32
48#define MT9M001_COLUMN_SKIP 20
49#define MT9M001_ROW_SKIP 12
50
51
52struct mt9m001_datafmt {
53 enum v4l2_mbus_pixelcode code;
54 enum v4l2_colorspace colorspace;
55};
56
57
58static const struct mt9m001_datafmt *mt9m001_find_datafmt(
59 enum v4l2_mbus_pixelcode code, const struct mt9m001_datafmt *fmt,
60 int n)
61{
62 int i;
63 for (i = 0; i < n; i++)
64 if (fmt[i].code == code)
65 return fmt + i;
66
67 return NULL;
68}
69
70static const struct mt9m001_datafmt mt9m001_colour_fmts[] = {
71
72
73
74
75 {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
76 {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
77};
78
79static const struct mt9m001_datafmt mt9m001_monochrome_fmts[] = {
80
81 {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
82 {V4L2_MBUS_FMT_GREY8_1X8, V4L2_COLORSPACE_JPEG},
83};
84
85struct mt9m001 {
86 struct v4l2_subdev subdev;
87 struct v4l2_rect rect;
88 const struct mt9m001_datafmt *fmt;
89 const struct mt9m001_datafmt *fmts;
90 int num_fmts;
91 int model;
92 unsigned int gain;
93 unsigned int exposure;
94 unsigned short y_skip_top;
95 unsigned char autoexposure;
96};
97
98static struct mt9m001 *to_mt9m001(const struct i2c_client *client)
99{
100 return container_of(i2c_get_clientdata(client), struct mt9m001, subdev);
101}
102
103static int reg_read(struct i2c_client *client, const u8 reg)
104{
105 s32 data = i2c_smbus_read_word_data(client, reg);
106 return data < 0 ? data : swab16(data);
107}
108
109static int reg_write(struct i2c_client *client, const u8 reg,
110 const u16 data)
111{
112 return i2c_smbus_write_word_data(client, reg, swab16(data));
113}
114
115static int reg_set(struct i2c_client *client, const u8 reg,
116 const u16 data)
117{
118 int ret;
119
120 ret = reg_read(client, reg);
121 if (ret < 0)
122 return ret;
123 return reg_write(client, reg, ret | data);
124}
125
126static int reg_clear(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
137static int mt9m001_init(struct i2c_client *client)
138{
139 int ret;
140
141 dev_dbg(&client->dev, "%s\n", __func__);
142
143
144
145
146
147 ret = reg_write(client, MT9M001_RESET, 1);
148 if (!ret)
149 ret = reg_write(client, MT9M001_RESET, 0);
150
151
152 if (!ret)
153 ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 0);
154
155 return ret;
156}
157
158static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable)
159{
160 struct i2c_client *client = sd->priv;
161
162
163 if (reg_write(client, MT9M001_OUTPUT_CONTROL, enable ? 2 : 0) < 0)
164 return -EIO;
165 return 0;
166}
167
168static int mt9m001_set_bus_param(struct soc_camera_device *icd,
169 unsigned long flags)
170{
171 struct soc_camera_link *icl = to_soc_camera_link(icd);
172 unsigned long width_flag = flags & SOCAM_DATAWIDTH_MASK;
173
174
175 if (!is_power_of_2(width_flag))
176 return -EINVAL;
177
178 if (icl->set_bus_param)
179 return icl->set_bus_param(icl, width_flag);
180
181
182
183
184
185 if (width_flag == SOCAM_DATAWIDTH_10)
186 return 0;
187
188 return -EINVAL;
189}
190
191static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd)
192{
193 struct soc_camera_link *icl = to_soc_camera_link(icd);
194
195 unsigned long flags = SOCAM_PCLK_SAMPLE_FALLING |
196 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH |
197 SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER;
198
199 if (icl->query_bus_param)
200 flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK;
201 else
202 flags |= SOCAM_DATAWIDTH_10;
203
204 return soc_camera_apply_sensor_flags(icl, flags);
205}
206
207static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
208{
209 struct i2c_client *client = sd->priv;
210 struct mt9m001 *mt9m001 = to_mt9m001(client);
211 struct v4l2_rect rect = a->c;
212 struct soc_camera_device *icd = client->dev.platform_data;
213 int ret;
214 const u16 hblank = 9, vblank = 25;
215 unsigned int total_h;
216
217 if (mt9m001->fmts == mt9m001_colour_fmts)
218
219
220
221
222 rect.height = ALIGN(rect.height, 2);
223
224
225 rect.width = ALIGN(rect.width, 2);
226 rect.left = ALIGN(rect.left, 2);
227
228 soc_camera_limit_side(&rect.left, &rect.width,
229 MT9M001_COLUMN_SKIP, MT9M001_MIN_WIDTH, MT9M001_MAX_WIDTH);
230
231 soc_camera_limit_side(&rect.top, &rect.height,
232 MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT);
233
234 total_h = rect.height + mt9m001->y_skip_top + vblank;
235
236
237 ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank);
238 if (!ret)
239 ret = reg_write(client, MT9M001_VERTICAL_BLANKING, vblank);
240
241
242
243
244
245 if (!ret)
246 ret = reg_write(client, MT9M001_COLUMN_START, rect.left);
247 if (!ret)
248 ret = reg_write(client, MT9M001_ROW_START, rect.top);
249 if (!ret)
250 ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect.width - 1);
251 if (!ret)
252 ret = reg_write(client, MT9M001_WINDOW_HEIGHT,
253 rect.height + mt9m001->y_skip_top - 1);
254 if (!ret && mt9m001->autoexposure) {
255 ret = reg_write(client, MT9M001_SHUTTER_WIDTH, total_h);
256 if (!ret) {
257 const struct v4l2_queryctrl *qctrl =
258 soc_camera_find_qctrl(icd->ops,
259 V4L2_CID_EXPOSURE);
260 mt9m001->exposure = (524 + (total_h - 1) *
261 (qctrl->maximum - qctrl->minimum)) /
262 1048 + qctrl->minimum;
263 }
264 }
265
266 if (!ret)
267 mt9m001->rect = rect;
268
269 return ret;
270}
271
272static int mt9m001_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
273{
274 struct i2c_client *client = sd->priv;
275 struct mt9m001 *mt9m001 = to_mt9m001(client);
276
277 a->c = mt9m001->rect;
278 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
279
280 return 0;
281}
282
283static int mt9m001_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
284{
285 a->bounds.left = MT9M001_COLUMN_SKIP;
286 a->bounds.top = MT9M001_ROW_SKIP;
287 a->bounds.width = MT9M001_MAX_WIDTH;
288 a->bounds.height = MT9M001_MAX_HEIGHT;
289 a->defrect = a->bounds;
290 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
291 a->pixelaspect.numerator = 1;
292 a->pixelaspect.denominator = 1;
293
294 return 0;
295}
296
297static int mt9m001_g_fmt(struct v4l2_subdev *sd,
298 struct v4l2_mbus_framefmt *mf)
299{
300 struct i2c_client *client = sd->priv;
301 struct mt9m001 *mt9m001 = to_mt9m001(client);
302
303 mf->width = mt9m001->rect.width;
304 mf->height = mt9m001->rect.height;
305 mf->code = mt9m001->fmt->code;
306 mf->colorspace = mt9m001->fmt->colorspace;
307 mf->field = V4L2_FIELD_NONE;
308
309 return 0;
310}
311
312static int mt9m001_s_fmt(struct v4l2_subdev *sd,
313 struct v4l2_mbus_framefmt *mf)
314{
315 struct i2c_client *client = sd->priv;
316 struct mt9m001 *mt9m001 = to_mt9m001(client);
317 struct v4l2_crop a = {
318 .c = {
319 .left = mt9m001->rect.left,
320 .top = mt9m001->rect.top,
321 .width = mf->width,
322 .height = mf->height,
323 },
324 };
325 int ret;
326
327
328 ret = mt9m001_s_crop(sd, &a);
329 if (!ret) {
330 mf->width = mt9m001->rect.width;
331 mf->height = mt9m001->rect.height;
332 mt9m001->fmt = mt9m001_find_datafmt(mf->code,
333 mt9m001->fmts, mt9m001->num_fmts);
334 mf->colorspace = mt9m001->fmt->colorspace;
335 }
336
337 return ret;
338}
339
340static int mt9m001_try_fmt(struct v4l2_subdev *sd,
341 struct v4l2_mbus_framefmt *mf)
342{
343 struct i2c_client *client = sd->priv;
344 struct mt9m001 *mt9m001 = to_mt9m001(client);
345 const struct mt9m001_datafmt *fmt;
346
347 v4l_bound_align_image(&mf->width, MT9M001_MIN_WIDTH,
348 MT9M001_MAX_WIDTH, 1,
349 &mf->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top,
350 MT9M001_MAX_HEIGHT + mt9m001->y_skip_top, 0, 0);
351
352 if (mt9m001->fmts == mt9m001_colour_fmts)
353 mf->height = ALIGN(mf->height - 1, 2);
354
355 fmt = mt9m001_find_datafmt(mf->code, mt9m001->fmts,
356 mt9m001->num_fmts);
357 if (!fmt) {
358 fmt = mt9m001->fmt;
359 mf->code = fmt->code;
360 }
361
362 mf->colorspace = fmt->colorspace;
363
364 return 0;
365}
366
367static int mt9m001_g_chip_ident(struct v4l2_subdev *sd,
368 struct v4l2_dbg_chip_ident *id)
369{
370 struct i2c_client *client = sd->priv;
371 struct mt9m001 *mt9m001 = to_mt9m001(client);
372
373 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
374 return -EINVAL;
375
376 if (id->match.addr != client->addr)
377 return -ENODEV;
378
379 id->ident = mt9m001->model;
380 id->revision = 0;
381
382 return 0;
383}
384
385#ifdef CONFIG_VIDEO_ADV_DEBUG
386static int mt9m001_g_register(struct v4l2_subdev *sd,
387 struct v4l2_dbg_register *reg)
388{
389 struct i2c_client *client = sd->priv;
390
391 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
392 return -EINVAL;
393
394 if (reg->match.addr != client->addr)
395 return -ENODEV;
396
397 reg->size = 2;
398 reg->val = reg_read(client, reg->reg);
399
400 if (reg->val > 0xffff)
401 return -EIO;
402
403 return 0;
404}
405
406static int mt9m001_s_register(struct v4l2_subdev *sd,
407 struct v4l2_dbg_register *reg)
408{
409 struct i2c_client *client = sd->priv;
410
411 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
412 return -EINVAL;
413
414 if (reg->match.addr != client->addr)
415 return -ENODEV;
416
417 if (reg_write(client, reg->reg, reg->val) < 0)
418 return -EIO;
419
420 return 0;
421}
422#endif
423
424static const struct v4l2_queryctrl mt9m001_controls[] = {
425 {
426 .id = V4L2_CID_VFLIP,
427 .type = V4L2_CTRL_TYPE_BOOLEAN,
428 .name = "Flip Vertically",
429 .minimum = 0,
430 .maximum = 1,
431 .step = 1,
432 .default_value = 0,
433 }, {
434 .id = V4L2_CID_GAIN,
435 .type = V4L2_CTRL_TYPE_INTEGER,
436 .name = "Gain",
437 .minimum = 0,
438 .maximum = 127,
439 .step = 1,
440 .default_value = 64,
441 .flags = V4L2_CTRL_FLAG_SLIDER,
442 }, {
443 .id = V4L2_CID_EXPOSURE,
444 .type = V4L2_CTRL_TYPE_INTEGER,
445 .name = "Exposure",
446 .minimum = 1,
447 .maximum = 255,
448 .step = 1,
449 .default_value = 255,
450 .flags = V4L2_CTRL_FLAG_SLIDER,
451 }, {
452 .id = V4L2_CID_EXPOSURE_AUTO,
453 .type = V4L2_CTRL_TYPE_BOOLEAN,
454 .name = "Automatic Exposure",
455 .minimum = 0,
456 .maximum = 1,
457 .step = 1,
458 .default_value = 1,
459 }
460};
461
462static struct soc_camera_ops mt9m001_ops = {
463 .set_bus_param = mt9m001_set_bus_param,
464 .query_bus_param = mt9m001_query_bus_param,
465 .controls = mt9m001_controls,
466 .num_controls = ARRAY_SIZE(mt9m001_controls),
467};
468
469static int mt9m001_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
470{
471 struct i2c_client *client = sd->priv;
472 struct mt9m001 *mt9m001 = to_mt9m001(client);
473 int data;
474
475 switch (ctrl->id) {
476 case V4L2_CID_VFLIP:
477 data = reg_read(client, MT9M001_READ_OPTIONS2);
478 if (data < 0)
479 return -EIO;
480 ctrl->value = !!(data & 0x8000);
481 break;
482 case V4L2_CID_EXPOSURE_AUTO:
483 ctrl->value = mt9m001->autoexposure;
484 break;
485 case V4L2_CID_GAIN:
486 ctrl->value = mt9m001->gain;
487 break;
488 case V4L2_CID_EXPOSURE:
489 ctrl->value = mt9m001->exposure;
490 break;
491 }
492 return 0;
493}
494
495static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
496{
497 struct i2c_client *client = sd->priv;
498 struct mt9m001 *mt9m001 = to_mt9m001(client);
499 struct soc_camera_device *icd = client->dev.platform_data;
500 const struct v4l2_queryctrl *qctrl;
501 int data;
502
503 qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id);
504
505 if (!qctrl)
506 return -EINVAL;
507
508 switch (ctrl->id) {
509 case V4L2_CID_VFLIP:
510 if (ctrl->value)
511 data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000);
512 else
513 data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000);
514 if (data < 0)
515 return -EIO;
516 break;
517 case V4L2_CID_GAIN:
518 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
519 return -EINVAL;
520
521 if (ctrl->value <= qctrl->default_value) {
522
523 unsigned long range = qctrl->default_value - qctrl->minimum;
524 data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range;
525
526 dev_dbg(&client->dev, "Setting gain %d\n", data);
527 data = reg_write(client, MT9M001_GLOBAL_GAIN, data);
528 if (data < 0)
529 return -EIO;
530 } else {
531
532
533 unsigned long range = qctrl->maximum - qctrl->default_value - 1;
534 unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
535 111 + range / 2) / range + 9;
536
537 if (gain <= 32)
538 data = gain;
539 else if (gain <= 64)
540 data = ((gain - 32) * 16 + 16) / 32 + 80;
541 else
542 data = ((gain - 64) * 7 + 28) / 56 + 96;
543
544 dev_dbg(&client->dev, "Setting gain from %d to %d\n",
545 reg_read(client, MT9M001_GLOBAL_GAIN), data);
546 data = reg_write(client, MT9M001_GLOBAL_GAIN, data);
547 if (data < 0)
548 return -EIO;
549 }
550
551
552 mt9m001->gain = ctrl->value;
553 break;
554 case V4L2_CID_EXPOSURE:
555
556 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
557 return -EINVAL;
558 else {
559 unsigned long range = qctrl->maximum - qctrl->minimum;
560 unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 +
561 range / 2) / range + 1;
562
563 dev_dbg(&client->dev,
564 "Setting shutter width from %d to %lu\n",
565 reg_read(client, MT9M001_SHUTTER_WIDTH),
566 shutter);
567 if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0)
568 return -EIO;
569 mt9m001->exposure = ctrl->value;
570 mt9m001->autoexposure = 0;
571 }
572 break;
573 case V4L2_CID_EXPOSURE_AUTO:
574 if (ctrl->value) {
575 const u16 vblank = 25;
576 unsigned int total_h = mt9m001->rect.height +
577 mt9m001->y_skip_top + vblank;
578 if (reg_write(client, MT9M001_SHUTTER_WIDTH,
579 total_h) < 0)
580 return -EIO;
581 qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
582 mt9m001->exposure = (524 + (total_h - 1) *
583 (qctrl->maximum - qctrl->minimum)) /
584 1048 + qctrl->minimum;
585 mt9m001->autoexposure = 1;
586 } else
587 mt9m001->autoexposure = 0;
588 break;
589 }
590 return 0;
591}
592
593
594
595
596
597static int mt9m001_video_probe(struct soc_camera_device *icd,
598 struct i2c_client *client)
599{
600 struct mt9m001 *mt9m001 = to_mt9m001(client);
601 struct soc_camera_link *icl = to_soc_camera_link(icd);
602 s32 data;
603 unsigned long flags;
604 int ret;
605
606
607
608
609
610 if (!icd->dev.parent ||
611 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
612 return -ENODEV;
613
614
615 data = reg_write(client, MT9M001_CHIP_ENABLE, 1);
616 dev_dbg(&client->dev, "write: %d\n", data);
617
618
619 data = reg_read(client, MT9M001_CHIP_VERSION);
620
621
622 switch (data) {
623 case 0x8411:
624 case 0x8421:
625 mt9m001->model = V4L2_IDENT_MT9M001C12ST;
626 mt9m001->fmts = mt9m001_colour_fmts;
627 break;
628 case 0x8431:
629 mt9m001->model = V4L2_IDENT_MT9M001C12STM;
630 mt9m001->fmts = mt9m001_monochrome_fmts;
631 break;
632 default:
633 dev_err(&client->dev,
634 "No MT9M001 chip detected, register read %x\n", data);
635 return -ENODEV;
636 }
637
638 mt9m001->num_fmts = 0;
639
640
641
642
643
644
645 if (icl->query_bus_param)
646 flags = icl->query_bus_param(icl);
647 else
648 flags = SOCAM_DATAWIDTH_10;
649
650 if (flags & SOCAM_DATAWIDTH_10)
651 mt9m001->num_fmts++;
652 else
653 mt9m001->fmts++;
654
655 if (flags & SOCAM_DATAWIDTH_8)
656 mt9m001->num_fmts++;
657
658 mt9m001->fmt = &mt9m001->fmts[0];
659
660 dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
661 data == 0x8431 ? "C12STM" : "C12ST");
662
663 ret = mt9m001_init(client);
664 if (ret < 0)
665 dev_err(&client->dev, "Failed to initialise the camera\n");
666
667
668 mt9m001->gain = 64;
669 mt9m001->exposure = 255;
670
671 return ret;
672}
673
674static void mt9m001_video_remove(struct soc_camera_device *icd)
675{
676 struct soc_camera_link *icl = to_soc_camera_link(icd);
677
678 dev_dbg(&icd->dev, "Video removed: %p, %p\n",
679 icd->dev.parent, icd->vdev);
680 if (icl->free_bus)
681 icl->free_bus(icl);
682}
683
684static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
685{
686 struct i2c_client *client = sd->priv;
687 struct mt9m001 *mt9m001 = to_mt9m001(client);
688
689 *lines = mt9m001->y_skip_top;
690
691 return 0;
692}
693
694static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = {
695 .g_ctrl = mt9m001_g_ctrl,
696 .s_ctrl = mt9m001_s_ctrl,
697 .g_chip_ident = mt9m001_g_chip_ident,
698#ifdef CONFIG_VIDEO_ADV_DEBUG
699 .g_register = mt9m001_g_register,
700 .s_register = mt9m001_s_register,
701#endif
702};
703
704static int mt9m001_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
705 enum v4l2_mbus_pixelcode *code)
706{
707 struct i2c_client *client = sd->priv;
708 struct mt9m001 *mt9m001 = to_mt9m001(client);
709
710 if (index >= mt9m001->num_fmts)
711 return -EINVAL;
712
713 *code = mt9m001->fmts[index].code;
714 return 0;
715}
716
717static struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = {
718 .s_stream = mt9m001_s_stream,
719 .s_mbus_fmt = mt9m001_s_fmt,
720 .g_mbus_fmt = mt9m001_g_fmt,
721 .try_mbus_fmt = mt9m001_try_fmt,
722 .s_crop = mt9m001_s_crop,
723 .g_crop = mt9m001_g_crop,
724 .cropcap = mt9m001_cropcap,
725 .enum_mbus_fmt = mt9m001_enum_fmt,
726};
727
728static struct v4l2_subdev_sensor_ops mt9m001_subdev_sensor_ops = {
729 .g_skip_top_lines = mt9m001_g_skip_top_lines,
730};
731
732static struct v4l2_subdev_ops mt9m001_subdev_ops = {
733 .core = &mt9m001_subdev_core_ops,
734 .video = &mt9m001_subdev_video_ops,
735 .sensor = &mt9m001_subdev_sensor_ops,
736};
737
738static int mt9m001_probe(struct i2c_client *client,
739 const struct i2c_device_id *did)
740{
741 struct mt9m001 *mt9m001;
742 struct soc_camera_device *icd = client->dev.platform_data;
743 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
744 struct soc_camera_link *icl;
745 int ret;
746
747 if (!icd) {
748 dev_err(&client->dev, "MT9M001: missing soc-camera data!\n");
749 return -EINVAL;
750 }
751
752 icl = to_soc_camera_link(icd);
753 if (!icl) {
754 dev_err(&client->dev, "MT9M001 driver needs platform data\n");
755 return -EINVAL;
756 }
757
758 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
759 dev_warn(&adapter->dev,
760 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
761 return -EIO;
762 }
763
764 mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL);
765 if (!mt9m001)
766 return -ENOMEM;
767
768 v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops);
769
770
771 icd->ops = &mt9m001_ops;
772
773 mt9m001->y_skip_top = 0;
774 mt9m001->rect.left = MT9M001_COLUMN_SKIP;
775 mt9m001->rect.top = MT9M001_ROW_SKIP;
776 mt9m001->rect.width = MT9M001_MAX_WIDTH;
777 mt9m001->rect.height = MT9M001_MAX_HEIGHT;
778
779
780
781
782
783 mt9m001->autoexposure = 1;
784
785 ret = mt9m001_video_probe(icd, client);
786 if (ret) {
787 icd->ops = NULL;
788 kfree(mt9m001);
789 }
790
791 return ret;
792}
793
794static int mt9m001_remove(struct i2c_client *client)
795{
796 struct mt9m001 *mt9m001 = to_mt9m001(client);
797 struct soc_camera_device *icd = client->dev.platform_data;
798
799 icd->ops = NULL;
800 mt9m001_video_remove(icd);
801 client->driver = NULL;
802 kfree(mt9m001);
803
804 return 0;
805}
806
807static const struct i2c_device_id mt9m001_id[] = {
808 { "mt9m001", 0 },
809 { }
810};
811MODULE_DEVICE_TABLE(i2c, mt9m001_id);
812
813static struct i2c_driver mt9m001_i2c_driver = {
814 .driver = {
815 .name = "mt9m001",
816 },
817 .probe = mt9m001_probe,
818 .remove = mt9m001_remove,
819 .id_table = mt9m001_id,
820};
821
822static int __init mt9m001_mod_init(void)
823{
824 return i2c_add_driver(&mt9m001_i2c_driver);
825}
826
827static void __exit mt9m001_mod_exit(void)
828{
829 i2c_del_driver(&mt9m001_i2c_driver);
830}
831
832module_init(mt9m001_mod_init);
833module_exit(mt9m001_mod_exit);
834
835MODULE_DESCRIPTION("Micron MT9M001 Camera driver");
836MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
837MODULE_LICENSE("GPL");
838
