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Merge remote-tracking branch 'moduleh/module.h-split'
[linux-2.6/next.git] / drivers / media / video / mt9m001.c
blob6866a9ef3f60c1e31330c37de2c4941de4d5ef18
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 #include <linux/module.h>
16
17 #include <media/v4l2-subdev.h>
18 #include <media/v4l2-chip-ident.h>
19 #include <media/soc_camera.h>
20
21 /*
22 * mt9m001 i2c address 0x5d
23 * The platform has to define ctruct i2c_board_info objects and link to them
24 * from struct soc_camera_link
25 */
26
27 /* mt9m001 selected register addresses */
28 #define MT9M001_CHIP_VERSION 0x00
29 #define MT9M001_ROW_START 0x01
30 #define MT9M001_COLUMN_START 0x02
31 #define MT9M001_WINDOW_HEIGHT 0x03
32 #define MT9M001_WINDOW_WIDTH 0x04
33 #define MT9M001_HORIZONTAL_BLANKING 0x05
34 #define MT9M001_VERTICAL_BLANKING 0x06
35 #define MT9M001_OUTPUT_CONTROL 0x07
36 #define MT9M001_SHUTTER_WIDTH 0x09
37 #define MT9M001_FRAME_RESTART 0x0b
38 #define MT9M001_SHUTTER_DELAY 0x0c
39 #define MT9M001_RESET 0x0d
40 #define MT9M001_READ_OPTIONS1 0x1e
41 #define MT9M001_READ_OPTIONS2 0x20
42 #define MT9M001_GLOBAL_GAIN 0x35
43 #define MT9M001_CHIP_ENABLE 0xF1
44
45 #define MT9M001_MAX_WIDTH 1280
46 #define MT9M001_MAX_HEIGHT 1024
47 #define MT9M001_MIN_WIDTH 48
48 #define MT9M001_MIN_HEIGHT 32
49 #define MT9M001_COLUMN_SKIP 20
50 #define MT9M001_ROW_SKIP 12
51
52 /* MT9M001 has only one fixed colorspace per pixelcode */
53 struct mt9m001_datafmt {
54 enum v4l2_mbus_pixelcode code;
55 enum v4l2_colorspace colorspace;
56 };
57
58 /* Find a data format by a pixel code in an array */
59 static const struct mt9m001_datafmt *mt9m001_find_datafmt(
60 enum v4l2_mbus_pixelcode code, const struct mt9m001_datafmt *fmt,
61 int n)
62 {
63 int i;
64 for (i = 0; i < n; i++)
65 if (fmt[i].code == code)
66 return fmt + i;
67
68 return NULL;
69 }
70
71 static const struct mt9m001_datafmt mt9m001_colour_fmts[] = {
72 /*
73 * Order important: first natively supported,
74 * second supported with a GPIO extender
75 */
76 {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
77 {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
78 };
79
80 static const struct mt9m001_datafmt mt9m001_monochrome_fmts[] = {
81 /* Order important - see above */
82 {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
83 {V4L2_MBUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
84 };
85
86 struct mt9m001 {
87 struct v4l2_subdev subdev;
88 struct v4l2_rect rect; /* Sensor window */
89 const struct mt9m001_datafmt *fmt;
90 const struct mt9m001_datafmt *fmts;
91 int num_fmts;
92 int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */
93 unsigned int gain;
94 unsigned int exposure;
95 unsigned short y_skip_top; /* Lines to skip at the top */
96 unsigned char autoexposure;
97 };
98
99 static struct mt9m001 *to_mt9m001(const struct i2c_client *client)
100 {
101 return container_of(i2c_get_clientdata(client), struct mt9m001, subdev);
102 }
103
104 static int reg_read(struct i2c_client *client, const u8 reg)
105 {
106 s32 data = i2c_smbus_read_word_data(client, reg);
107 return data < 0 ? data : swab16(data);
108 }
109
110 static int reg_write(struct i2c_client *client, const u8 reg,
111 const u16 data)
112 {
113 return i2c_smbus_write_word_data(client, reg, swab16(data));
114 }
115
116 static int reg_set(struct i2c_client *client, const u8 reg,
117 const u16 data)
118 {
119 int ret;
120
121 ret = reg_read(client, reg);
122 if (ret < 0)
123 return ret;
124 return reg_write(client, reg, ret | data);
125 }
126
127 static int reg_clear(struct i2c_client *client, const u8 reg,
128 const u16 data)
129 {
130 int ret;
131
132 ret = reg_read(client, reg);
133 if (ret < 0)
134 return ret;
135 return reg_write(client, reg, ret & ~data);
136 }
137
138 static int mt9m001_init(struct i2c_client *client)
139 {
140 int ret;
141
142 dev_dbg(&client->dev, "%s\n", __func__);
143
144 /*
145 * We don't know, whether platform provides reset, issue a soft reset
146 * too. This returns all registers to their default values.
147 */
148 ret = reg_write(client, MT9M001_RESET, 1);
149 if (!ret)
150 ret = reg_write(client, MT9M001_RESET, 0);
151
152 /* Disable chip, synchronous option update */
153 if (!ret)
154 ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 0);
155
156 return ret;
157 }
158
159 static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable)
160 {
161 struct i2c_client *client = v4l2_get_subdevdata(sd);
162
163 /* Switch to master "normal" mode or stop sensor readout */
164 if (reg_write(client, MT9M001_OUTPUT_CONTROL, enable ? 2 : 0) < 0)
165 return -EIO;
166 return 0;
167 }
168
169 static int mt9m001_set_bus_param(struct soc_camera_device *icd,
170 unsigned long flags)
171 {
172 struct soc_camera_link *icl = to_soc_camera_link(icd);
173 unsigned long width_flag = flags & SOCAM_DATAWIDTH_MASK;
174
175 /* Only one width bit may be set */
176 if (!is_power_of_2(width_flag))
177 return -EINVAL;
178
179 if (icl->set_bus_param)
180 return icl->set_bus_param(icl, width_flag);
181
182 /*
183 * Without board specific bus width settings we only support the
184 * sensors native bus width
185 */
186 if (width_flag == SOCAM_DATAWIDTH_10)
187 return 0;
188
189 return -EINVAL;
190 }
191
192 static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd)
193 {
194 struct soc_camera_link *icl = to_soc_camera_link(icd);
195 /* MT9M001 has all capture_format parameters fixed */
196 unsigned long flags = SOCAM_PCLK_SAMPLE_FALLING |
197 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH |
198 SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER;
199
200 if (icl->query_bus_param)
201 flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK;
202 else
203 flags |= SOCAM_DATAWIDTH_10;
204
205 return soc_camera_apply_sensor_flags(icl, flags);
206 }
207
208 static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
209 {
210 struct i2c_client *client = v4l2_get_subdevdata(sd);
211 struct mt9m001 *mt9m001 = to_mt9m001(client);
212 struct v4l2_rect rect = a->c;
213 struct soc_camera_device *icd = client->dev.platform_data;
214 int ret;
215 const u16 hblank = 9, vblank = 25;
216 unsigned int total_h;
217
218 if (mt9m001->fmts == mt9m001_colour_fmts)
219 /*
220 * Bayer format - even number of rows for simplicity,
221 * but let the user play with the top row.
222 */
223 rect.height = ALIGN(rect.height, 2);
224
225 /* Datasheet requirement: see register description */
226 rect.width = ALIGN(rect.width, 2);
227 rect.left = ALIGN(rect.left, 2);
228
229 soc_camera_limit_side(&rect.left, &rect.width,
230 MT9M001_COLUMN_SKIP, MT9M001_MIN_WIDTH, MT9M001_MAX_WIDTH);
231
232 soc_camera_limit_side(&rect.top, &rect.height,
233 MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT);
234
235 total_h = rect.height + mt9m001->y_skip_top + vblank;
236
237 /* Blanking and start values - default... */
238 ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank);
239 if (!ret)
240 ret = reg_write(client, MT9M001_VERTICAL_BLANKING, vblank);
241
242 /*
243 * The caller provides a supported format, as verified per
244 * call to icd->try_fmt()
245 */
246 if (!ret)
247 ret = reg_write(client, MT9M001_COLUMN_START, rect.left);
248 if (!ret)
249 ret = reg_write(client, MT9M001_ROW_START, rect.top);
250 if (!ret)
251 ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect.width - 1);
252 if (!ret)
253 ret = reg_write(client, MT9M001_WINDOW_HEIGHT,
254 rect.height + mt9m001->y_skip_top - 1);
255 if (!ret && mt9m001->autoexposure) {
256 ret = reg_write(client, MT9M001_SHUTTER_WIDTH, total_h);
257 if (!ret) {
258 const struct v4l2_queryctrl *qctrl =
259 soc_camera_find_qctrl(icd->ops,
260 V4L2_CID_EXPOSURE);
261 mt9m001->exposure = (524 + (total_h - 1) *
262 (qctrl->maximum - qctrl->minimum)) /
263 1048 + qctrl->minimum;
264 }
265 }
266
267 if (!ret)
268 mt9m001->rect = rect;
269
270 return ret;
271 }
272
273 static int mt9m001_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
274 {
275 struct i2c_client *client = v4l2_get_subdevdata(sd);
276 struct mt9m001 *mt9m001 = to_mt9m001(client);
277
278 a->c = mt9m001->rect;
279 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
280
281 return 0;
282 }
283
284 static int mt9m001_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
285 {
286 a->bounds.left = MT9M001_COLUMN_SKIP;
287 a->bounds.top = MT9M001_ROW_SKIP;
288 a->bounds.width = MT9M001_MAX_WIDTH;
289 a->bounds.height = MT9M001_MAX_HEIGHT;
290 a->defrect = a->bounds;
291 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
292 a->pixelaspect.numerator = 1;
293 a->pixelaspect.denominator = 1;
294
295 return 0;
296 }
297
298 static int mt9m001_g_fmt(struct v4l2_subdev *sd,
299 struct v4l2_mbus_framefmt *mf)
300 {
301 struct i2c_client *client = v4l2_get_subdevdata(sd);
302 struct mt9m001 *mt9m001 = to_mt9m001(client);
303
304 mf->width = mt9m001->rect.width;
305 mf->height = mt9m001->rect.height;
306 mf->code = mt9m001->fmt->code;
307 mf->colorspace = mt9m001->fmt->colorspace;
308 mf->field = V4L2_FIELD_NONE;
309
310 return 0;
311 }
312
313 static int mt9m001_s_fmt(struct v4l2_subdev *sd,
314 struct v4l2_mbus_framefmt *mf)
315 {
316 struct i2c_client *client = v4l2_get_subdevdata(sd);
317 struct mt9m001 *mt9m001 = to_mt9m001(client);
318 struct v4l2_crop a = {
319 .c = {
320 .left = mt9m001->rect.left,
321 .top = mt9m001->rect.top,
322 .width = mf->width,
323 .height = mf->height,
324 },
325 };
326 int ret;
327
328 /* No support for scaling so far, just crop. TODO: use skipping */
329 ret = mt9m001_s_crop(sd, &a);
330 if (!ret) {
331 mf->width = mt9m001->rect.width;
332 mf->height = mt9m001->rect.height;
333 mt9m001->fmt = mt9m001_find_datafmt(mf->code,
334 mt9m001->fmts, mt9m001->num_fmts);
335 mf->colorspace = mt9m001->fmt->colorspace;
336 }
337
338 return ret;
339 }
340
341 static int mt9m001_try_fmt(struct v4l2_subdev *sd,
342 struct v4l2_mbus_framefmt *mf)
343 {
344 struct i2c_client *client = v4l2_get_subdevdata(sd);
345 struct mt9m001 *mt9m001 = to_mt9m001(client);
346 const struct mt9m001_datafmt *fmt;
347
348 v4l_bound_align_image(&mf->width, MT9M001_MIN_WIDTH,
349 MT9M001_MAX_WIDTH, 1,
350 &mf->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top,
351 MT9M001_MAX_HEIGHT + mt9m001->y_skip_top, 0, 0);
352
353 if (mt9m001->fmts == mt9m001_colour_fmts)
354 mf->height = ALIGN(mf->height - 1, 2);
355
356 fmt = mt9m001_find_datafmt(mf->code, mt9m001->fmts,
357 mt9m001->num_fmts);
358 if (!fmt) {
359 fmt = mt9m001->fmt;
360 mf->code = fmt->code;
361 }
362
363 mf->colorspace = fmt->colorspace;
364
365 return 0;
366 }
367
368 static int mt9m001_g_chip_ident(struct v4l2_subdev *sd,
369 struct v4l2_dbg_chip_ident *id)
370 {
371 struct i2c_client *client = v4l2_get_subdevdata(sd);
372 struct mt9m001 *mt9m001 = to_mt9m001(client);
373
374 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
375 return -EINVAL;
376
377 if (id->match.addr != client->addr)
378 return -ENODEV;
379
380 id->ident = mt9m001->model;
381 id->revision = 0;
382
383 return 0;
384 }
385
386 #ifdef CONFIG_VIDEO_ADV_DEBUG
387 static int mt9m001_g_register(struct v4l2_subdev *sd,
388 struct v4l2_dbg_register *reg)
389 {
390 struct i2c_client *client = v4l2_get_subdevdata(sd);
391
392 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
393 return -EINVAL;
394
395 if (reg->match.addr != client->addr)
396 return -ENODEV;
397
398 reg->size = 2;
399 reg->val = reg_read(client, reg->reg);
400
401 if (reg->val > 0xffff)
402 return -EIO;
403
404 return 0;
405 }
406
407 static int mt9m001_s_register(struct v4l2_subdev *sd,
408 struct v4l2_dbg_register *reg)
409 {
410 struct i2c_client *client = v4l2_get_subdevdata(sd);
411
412 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
413 return -EINVAL;
414
415 if (reg->match.addr != client->addr)
416 return -ENODEV;
417
418 if (reg_write(client, reg->reg, reg->val) < 0)
419 return -EIO;
420
421 return 0;
422 }
423 #endif
424
425 static const struct v4l2_queryctrl mt9m001_controls[] = {
426 {
427 .id = V4L2_CID_VFLIP,
428 .type = V4L2_CTRL_TYPE_BOOLEAN,
429 .name = "Flip Vertically",
430 .minimum = 0,
431 .maximum = 1,
432 .step = 1,
433 .default_value = 0,
434 }, {
435 .id = V4L2_CID_GAIN,
436 .type = V4L2_CTRL_TYPE_INTEGER,
437 .name = "Gain",
438 .minimum = 0,
439 .maximum = 127,
440 .step = 1,
441 .default_value = 64,
442 .flags = V4L2_CTRL_FLAG_SLIDER,
443 }, {
444 .id = V4L2_CID_EXPOSURE,
445 .type = V4L2_CTRL_TYPE_INTEGER,
446 .name = "Exposure",
447 .minimum = 1,
448 .maximum = 255,
449 .step = 1,
450 .default_value = 255,
451 .flags = V4L2_CTRL_FLAG_SLIDER,
452 }, {
453 .id = V4L2_CID_EXPOSURE_AUTO,
454 .type = V4L2_CTRL_TYPE_BOOLEAN,
455 .name = "Automatic Exposure",
456 .minimum = 0,
457 .maximum = 1,
458 .step = 1,
459 .default_value = 1,
460 }
461 };
462
463 static struct soc_camera_ops mt9m001_ops = {
464 .set_bus_param = mt9m001_set_bus_param,
465 .query_bus_param = mt9m001_query_bus_param,
466 .controls = mt9m001_controls,
467 .num_controls = ARRAY_SIZE(mt9m001_controls),
468 };
469
470 static int mt9m001_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
471 {
472 struct i2c_client *client = v4l2_get_subdevdata(sd);
473 struct mt9m001 *mt9m001 = to_mt9m001(client);
474 int data;
475
476 switch (ctrl->id) {
477 case V4L2_CID_VFLIP:
478 data = reg_read(client, MT9M001_READ_OPTIONS2);
479 if (data < 0)
480 return -EIO;
481 ctrl->value = !!(data & 0x8000);
482 break;
483 case V4L2_CID_EXPOSURE_AUTO:
484 ctrl->value = mt9m001->autoexposure;
485 break;
486 case V4L2_CID_GAIN:
487 ctrl->value = mt9m001->gain;
488 break;
489 case V4L2_CID_EXPOSURE:
490 ctrl->value = mt9m001->exposure;
491 break;
492 }
493 return 0;
494 }
495
496 static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
497 {
498 struct i2c_client *client = v4l2_get_subdevdata(sd);
499 struct mt9m001 *mt9m001 = to_mt9m001(client);
500 struct soc_camera_device *icd = client->dev.platform_data;
501 const struct v4l2_queryctrl *qctrl;
502 int data;
503
504 qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id);
505
506 if (!qctrl)
507 return -EINVAL;
508
509 switch (ctrl->id) {
510 case V4L2_CID_VFLIP:
511 if (ctrl->value)
512 data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000);
513 else
514 data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000);
515 if (data < 0)
516 return -EIO;
517 break;
518 case V4L2_CID_GAIN:
519 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
520 return -EINVAL;
521 /* See Datasheet Table 7, Gain settings. */
522 if (ctrl->value <= qctrl->default_value) {
523 /* Pack it into 0..1 step 0.125, register values 0..8 */
524 unsigned long range = qctrl->default_value - qctrl->minimum;
525 data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range;
526
527 dev_dbg(&client->dev, "Setting gain %d\n", data);
528 data = reg_write(client, MT9M001_GLOBAL_GAIN, data);
529 if (data < 0)
530 return -EIO;
531 } else {
532 /* Pack it into 1.125..15 variable step, register values 9..67 */
533 /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
534 unsigned long range = qctrl->maximum - qctrl->default_value - 1;
535 unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
536 111 + range / 2) / range + 9;
537
538 if (gain <= 32)
539 data = gain;
540 else if (gain <= 64)
541 data = ((gain - 32) * 16 + 16) / 32 + 80;
542 else
543 data = ((gain - 64) * 7 + 28) / 56 + 96;
544
545 dev_dbg(&client->dev, "Setting gain from %d to %d\n",
546 reg_read(client, MT9M001_GLOBAL_GAIN), data);
547 data = reg_write(client, MT9M001_GLOBAL_GAIN, data);
548 if (data < 0)
549 return -EIO;
550 }
551
552 /* Success */
553 mt9m001->gain = ctrl->value;
554 break;
555 case V4L2_CID_EXPOSURE:
556 /* mt9m001 has maximum == default */
557 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
558 return -EINVAL;
559 else {
560 unsigned long range = qctrl->maximum - qctrl->minimum;
561 unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 +
562 range / 2) / range + 1;
563
564 dev_dbg(&client->dev,
565 "Setting shutter width from %d to %lu\n",
566 reg_read(client, MT9M001_SHUTTER_WIDTH),
567 shutter);
568 if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0)
569 return -EIO;
570 mt9m001->exposure = ctrl->value;
571 mt9m001->autoexposure = 0;
572 }
573 break;
574 case V4L2_CID_EXPOSURE_AUTO:
575 if (ctrl->value) {
576 const u16 vblank = 25;
577 unsigned int total_h = mt9m001->rect.height +
578 mt9m001->y_skip_top + vblank;
579 if (reg_write(client, MT9M001_SHUTTER_WIDTH,
580 total_h) < 0)
581 return -EIO;
582 qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
583 mt9m001->exposure = (524 + (total_h - 1) *
584 (qctrl->maximum - qctrl->minimum)) /
585 1048 + qctrl->minimum;
586 mt9m001->autoexposure = 1;
587 } else
588 mt9m001->autoexposure = 0;
589 break;
590 }
591 return 0;
592 }
593
594 /*
595 * Interface active, can use i2c. If it fails, it can indeed mean, that
596 * this wasn't our capture interface, so, we wait for the right one
597 */
598 static int mt9m001_video_probe(struct soc_camera_device *icd,
599 struct i2c_client *client)
600 {
601 struct mt9m001 *mt9m001 = to_mt9m001(client);
602 struct soc_camera_link *icl = to_soc_camera_link(icd);
603 s32 data;
604 unsigned long flags;
605 int ret;
606
607 /* We must have a parent by now. And it cannot be a wrong one. */
608 BUG_ON(!icd->parent ||
609 to_soc_camera_host(icd->parent)->nr != icd->iface);
610
611 /* Enable the chip */
612 data = reg_write(client, MT9M001_CHIP_ENABLE, 1);
613 dev_dbg(&client->dev, "write: %d\n", data);
614
615 /* Read out the chip version register */
616 data = reg_read(client, MT9M001_CHIP_VERSION);
617
618 /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */
619 switch (data) {
620 case 0x8411:
621 case 0x8421:
622 mt9m001->model = V4L2_IDENT_MT9M001C12ST;
623 mt9m001->fmts = mt9m001_colour_fmts;
624 break;
625 case 0x8431:
626 mt9m001->model = V4L2_IDENT_MT9M001C12STM;
627 mt9m001->fmts = mt9m001_monochrome_fmts;
628 break;
629 default:
630 dev_err(&client->dev,
631 "No MT9M001 chip detected, register read %x\n", data);
632 return -ENODEV;
633 }
634
635 mt9m001->num_fmts = 0;
636
637 /*
638 * This is a 10bit sensor, so by default we only allow 10bit.
639 * The platform may support different bus widths due to
640 * different routing of the data lines.
641 */
642 if (icl->query_bus_param)
643 flags = icl->query_bus_param(icl);
644 else
645 flags = SOCAM_DATAWIDTH_10;
646
647 if (flags & SOCAM_DATAWIDTH_10)
648 mt9m001->num_fmts++;
649 else
650 mt9m001->fmts++;
651
652 if (flags & SOCAM_DATAWIDTH_8)
653 mt9m001->num_fmts++;
654
655 mt9m001->fmt = &mt9m001->fmts[0];
656
657 dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
658 data == 0x8431 ? "C12STM" : "C12ST");
659
660 ret = mt9m001_init(client);
661 if (ret < 0)
662 dev_err(&client->dev, "Failed to initialise the camera\n");
663
664 /* mt9m001_init() has reset the chip, returning registers to defaults */
665 mt9m001->gain = 64;
666 mt9m001->exposure = 255;
667
668 return ret;
669 }
670
671 static void mt9m001_video_remove(struct soc_camera_device *icd)
672 {
673 struct soc_camera_link *icl = to_soc_camera_link(icd);
674
675 dev_dbg(icd->pdev, "Video removed: %p, %p\n",
676 icd->parent, icd->vdev);
677 if (icl->free_bus)
678 icl->free_bus(icl);
679 }
680
681 static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
682 {
683 struct i2c_client *client = v4l2_get_subdevdata(sd);
684 struct mt9m001 *mt9m001 = to_mt9m001(client);
685
686 *lines = mt9m001->y_skip_top;
687
688 return 0;
689 }
690
691 static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = {
692 .g_ctrl = mt9m001_g_ctrl,
693 .s_ctrl = mt9m001_s_ctrl,
694 .g_chip_ident = mt9m001_g_chip_ident,
695 #ifdef CONFIG_VIDEO_ADV_DEBUG
696 .g_register = mt9m001_g_register,
697 .s_register = mt9m001_s_register,
698 #endif
699 };
700
701 static int mt9m001_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
702 enum v4l2_mbus_pixelcode *code)
703 {
704 struct i2c_client *client = v4l2_get_subdevdata(sd);
705 struct mt9m001 *mt9m001 = to_mt9m001(client);
706
707 if (index >= mt9m001->num_fmts)
708 return -EINVAL;
709
710 *code = mt9m001->fmts[index].code;
711 return 0;
712 }
713
714 static struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = {
715 .s_stream = mt9m001_s_stream,
716 .s_mbus_fmt = mt9m001_s_fmt,
717 .g_mbus_fmt = mt9m001_g_fmt,
718 .try_mbus_fmt = mt9m001_try_fmt,
719 .s_crop = mt9m001_s_crop,
720 .g_crop = mt9m001_g_crop,
721 .cropcap = mt9m001_cropcap,
722 .enum_mbus_fmt = mt9m001_enum_fmt,
723 };
724
725 static struct v4l2_subdev_sensor_ops mt9m001_subdev_sensor_ops = {
726 .g_skip_top_lines = mt9m001_g_skip_top_lines,
727 };
728
729 static struct v4l2_subdev_ops mt9m001_subdev_ops = {
730 .core = &mt9m001_subdev_core_ops,
731 .video = &mt9m001_subdev_video_ops,
732 .sensor = &mt9m001_subdev_sensor_ops,
733 };
734
735 static int mt9m001_probe(struct i2c_client *client,
736 const struct i2c_device_id *did)
737 {
738 struct mt9m001 *mt9m001;
739 struct soc_camera_device *icd = client->dev.platform_data;
740 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
741 struct soc_camera_link *icl;
742 int ret;
743
744 if (!icd) {
745 dev_err(&client->dev, "MT9M001: missing soc-camera data!\n");
746 return -EINVAL;
747 }
748
749 icl = to_soc_camera_link(icd);
750 if (!icl) {
751 dev_err(&client->dev, "MT9M001 driver needs platform data\n");
752 return -EINVAL;
753 }
754
755 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
756 dev_warn(&adapter->dev,
757 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
758 return -EIO;
759 }
760
761 mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL);
762 if (!mt9m001)
763 return -ENOMEM;
764
765 v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops);
766
767 /* Second stage probe - when a capture adapter is there */
768 icd->ops = &mt9m001_ops;
769
770 mt9m001->y_skip_top = 0;
771 mt9m001->rect.left = MT9M001_COLUMN_SKIP;
772 mt9m001->rect.top = MT9M001_ROW_SKIP;
773 mt9m001->rect.width = MT9M001_MAX_WIDTH;
774 mt9m001->rect.height = MT9M001_MAX_HEIGHT;
775
776 /*
777 * Simulated autoexposure. If enabled, we calculate shutter width
778 * ourselves in the driver based on vertical blanking and frame width
779 */
780 mt9m001->autoexposure = 1;
781
782 ret = mt9m001_video_probe(icd, client);
783 if (ret) {
784 icd->ops = NULL;
785 kfree(mt9m001);
786 }
787
788 return ret;
789 }
790
791 static int mt9m001_remove(struct i2c_client *client)
792 {
793 struct mt9m001 *mt9m001 = to_mt9m001(client);
794 struct soc_camera_device *icd = client->dev.platform_data;
795
796 icd->ops = NULL;
797 mt9m001_video_remove(icd);
798 kfree(mt9m001);
799
800 return 0;
801 }
802
803 static const struct i2c_device_id mt9m001_id[] = {
804 { "mt9m001", 0 },
805 { }
806 };
807 MODULE_DEVICE_TABLE(i2c, mt9m001_id);
808
809 static struct i2c_driver mt9m001_i2c_driver = {
810 .driver = {
811 .name = "mt9m001",
812 },
813 .probe = mt9m001_probe,
814 .remove = mt9m001_remove,
815 .id_table = mt9m001_id,
816 };
817
818 static int __init mt9m001_mod_init(void)
819 {
820 return i2c_add_driver(&mt9m001_i2c_driver);
821 }
822
823 static void __exit mt9m001_mod_exit(void)
824 {
825 i2c_del_driver(&mt9m001_i2c_driver);
826 }
827
828 module_init(mt9m001_mod_init);
829 module_exit(mt9m001_mod_exit);
830
831 MODULE_DESCRIPTION("Micron MT9M001 Camera driver");
832 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
833 MODULE_LICENSE("GPL");
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