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i2c: Fix userspace_device list corruption
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / media / video / mt9v022.c
blob995607f9d3ba97a9caea35e0f4fff014866f001c
1 /*
2 * Driver for MT9V022 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/delay.h>
15 #include <linux/log2.h>
16
17 #include <media/v4l2-subdev.h>
18 #include <media/v4l2-chip-ident.h>
19 #include <media/soc_camera.h>
20
21 /* mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
22 * The platform has to define ctruct i2c_board_info objects and link to them
23 * from struct soc_camera_link */
24
25 static char *sensor_type;
26 module_param(sensor_type, charp, S_IRUGO);
27 MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
28
29 /* mt9v022 selected register addresses */
30 #define MT9V022_CHIP_VERSION 0x00
31 #define MT9V022_COLUMN_START 0x01
32 #define MT9V022_ROW_START 0x02
33 #define MT9V022_WINDOW_HEIGHT 0x03
34 #define MT9V022_WINDOW_WIDTH 0x04
35 #define MT9V022_HORIZONTAL_BLANKING 0x05
36 #define MT9V022_VERTICAL_BLANKING 0x06
37 #define MT9V022_CHIP_CONTROL 0x07
38 #define MT9V022_SHUTTER_WIDTH1 0x08
39 #define MT9V022_SHUTTER_WIDTH2 0x09
40 #define MT9V022_SHUTTER_WIDTH_CTRL 0x0a
41 #define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b
42 #define MT9V022_RESET 0x0c
43 #define MT9V022_READ_MODE 0x0d
44 #define MT9V022_MONITOR_MODE 0x0e
45 #define MT9V022_PIXEL_OPERATION_MODE 0x0f
46 #define MT9V022_LED_OUT_CONTROL 0x1b
47 #define MT9V022_ADC_MODE_CONTROL 0x1c
48 #define MT9V022_ANALOG_GAIN 0x35
49 #define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47
50 #define MT9V022_PIXCLK_FV_LV 0x74
51 #define MT9V022_DIGITAL_TEST_PATTERN 0x7f
52 #define MT9V022_AEC_AGC_ENABLE 0xAF
53 #define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
54
55 /* Progressive scan, master, defaults */
56 #define MT9V022_CHIP_CONTROL_DEFAULT 0x188
57
58 #define MT9V022_MAX_WIDTH 752
59 #define MT9V022_MAX_HEIGHT 480
60 #define MT9V022_MIN_WIDTH 48
61 #define MT9V022_MIN_HEIGHT 32
62 #define MT9V022_COLUMN_SKIP 1
63 #define MT9V022_ROW_SKIP 4
64
65 static const struct soc_camera_data_format mt9v022_colour_formats[] = {
66 /* Order important: first natively supported,
67 * second supported with a GPIO extender */
68 {
69 .name = "Bayer (sRGB) 10 bit",
70 .depth = 10,
71 .fourcc = V4L2_PIX_FMT_SBGGR16,
72 .colorspace = V4L2_COLORSPACE_SRGB,
73 }, {
74 .name = "Bayer (sRGB) 8 bit",
75 .depth = 8,
76 .fourcc = V4L2_PIX_FMT_SBGGR8,
77 .colorspace = V4L2_COLORSPACE_SRGB,
78 }
79 };
80
81 static const struct soc_camera_data_format mt9v022_monochrome_formats[] = {
82 /* Order important - see above */
83 {
84 .name = "Monochrome 10 bit",
85 .depth = 10,
86 .fourcc = V4L2_PIX_FMT_Y16,
87 }, {
88 .name = "Monochrome 8 bit",
89 .depth = 8,
90 .fourcc = V4L2_PIX_FMT_GREY,
91 },
92 };
93
94 struct mt9v022 {
95 struct v4l2_subdev subdev;
96 struct v4l2_rect rect; /* Sensor window */
97 __u32 fourcc;
98 int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
99 u16 chip_control;
100 };
101
102 static struct mt9v022 *to_mt9v022(const struct i2c_client *client)
103 {
104 return container_of(i2c_get_clientdata(client), struct mt9v022, subdev);
105 }
106
107 static int reg_read(struct i2c_client *client, const u8 reg)
108 {
109 s32 data = i2c_smbus_read_word_data(client, reg);
110 return data < 0 ? data : swab16(data);
111 }
112
113 static int reg_write(struct i2c_client *client, const u8 reg,
114 const u16 data)
115 {
116 return i2c_smbus_write_word_data(client, reg, swab16(data));
117 }
118
119 static int reg_set(struct i2c_client *client, const u8 reg,
120 const u16 data)
121 {
122 int ret;
123
124 ret = reg_read(client, reg);
125 if (ret < 0)
126 return ret;
127 return reg_write(client, reg, ret | data);
128 }
129
130 static int reg_clear(struct i2c_client *client, const u8 reg,
131 const u16 data)
132 {
133 int ret;
134
135 ret = reg_read(client, reg);
136 if (ret < 0)
137 return ret;
138 return reg_write(client, reg, ret & ~data);
139 }
140
141 static int mt9v022_init(struct i2c_client *client)
142 {
143 struct mt9v022 *mt9v022 = to_mt9v022(client);
144 int ret;
145
146 /* Almost the default mode: master, parallel, simultaneous, and an
147 * undocumented bit 0x200, which is present in table 7, but not in 8,
148 * plus snapshot mode to disable scan for now */
149 mt9v022->chip_control |= 0x10;
150 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
151 if (!ret)
152 ret = reg_write(client, MT9V022_READ_MODE, 0x300);
153
154 /* All defaults */
155 if (!ret)
156 /* AEC, AGC on */
157 ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
158 if (!ret)
159 ret = reg_write(client, MT9V022_ANALOG_GAIN, 16);
160 if (!ret)
161 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 480);
162 if (!ret)
163 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
164 if (!ret)
165 /* default - auto */
166 ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
167 if (!ret)
168 ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
169
170 return ret;
171 }
172
173 static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable)
174 {
175 struct i2c_client *client = sd->priv;
176 struct mt9v022 *mt9v022 = to_mt9v022(client);
177
178 if (enable)
179 /* Switch to master "normal" mode */
180 mt9v022->chip_control &= ~0x10;
181 else
182 /* Switch to snapshot mode */
183 mt9v022->chip_control |= 0x10;
184
185 if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
186 return -EIO;
187 return 0;
188 }
189
190 static int mt9v022_set_bus_param(struct soc_camera_device *icd,
191 unsigned long flags)
192 {
193 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
194 struct mt9v022 *mt9v022 = to_mt9v022(client);
195 struct soc_camera_link *icl = to_soc_camera_link(icd);
196 unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK;
197 int ret;
198 u16 pixclk = 0;
199
200 /* Only one width bit may be set */
201 if (!is_power_of_2(width_flag))
202 return -EINVAL;
203
204 if (icl->set_bus_param) {
205 ret = icl->set_bus_param(icl, width_flag);
206 if (ret)
207 return ret;
208 } else {
209 /*
210 * Without board specific bus width settings we only support the
211 * sensors native bus width
212 */
213 if (width_flag != SOCAM_DATAWIDTH_10)
214 return -EINVAL;
215 }
216
217 flags = soc_camera_apply_sensor_flags(icl, flags);
218
219 if (flags & SOCAM_PCLK_SAMPLE_RISING)
220 pixclk |= 0x10;
221
222 if (!(flags & SOCAM_HSYNC_ACTIVE_HIGH))
223 pixclk |= 0x1;
224
225 if (!(flags & SOCAM_VSYNC_ACTIVE_HIGH))
226 pixclk |= 0x2;
227
228 ret = reg_write(client, MT9V022_PIXCLK_FV_LV, pixclk);
229 if (ret < 0)
230 return ret;
231
232 if (!(flags & SOCAM_MASTER))
233 mt9v022->chip_control &= ~0x8;
234
235 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
236 if (ret < 0)
237 return ret;
238
239 dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
240 pixclk, mt9v022->chip_control);
241
242 return 0;
243 }
244
245 static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd)
246 {
247 struct soc_camera_link *icl = to_soc_camera_link(icd);
248 unsigned int width_flag;
249
250 if (icl->query_bus_param)
251 width_flag = icl->query_bus_param(icl) &
252 SOCAM_DATAWIDTH_MASK;
253 else
254 width_flag = SOCAM_DATAWIDTH_10;
255
256 return SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
257 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
258 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
259 SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER | SOCAM_SLAVE |
260 width_flag;
261 }
262
263 static int mt9v022_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
264 {
265 struct i2c_client *client = sd->priv;
266 struct mt9v022 *mt9v022 = to_mt9v022(client);
267 struct v4l2_rect rect = a->c;
268 struct soc_camera_device *icd = client->dev.platform_data;
269 int ret;
270
271 /* Bayer format - even size lengths */
272 if (mt9v022->fourcc == V4L2_PIX_FMT_SBGGR8 ||
273 mt9v022->fourcc == V4L2_PIX_FMT_SBGGR16) {
274 rect.width = ALIGN(rect.width, 2);
275 rect.height = ALIGN(rect.height, 2);
276 /* Let the user play with the starting pixel */
277 }
278
279 soc_camera_limit_side(&rect.left, &rect.width,
280 MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH);
281
282 soc_camera_limit_side(&rect.top, &rect.height,
283 MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT);
284
285 /* Like in example app. Contradicts the datasheet though */
286 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
287 if (ret >= 0) {
288 if (ret & 1) /* Autoexposure */
289 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
290 rect.height + icd->y_skip_top + 43);
291 else
292 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
293 rect.height + icd->y_skip_top + 43);
294 }
295 /* Setup frame format: defaults apart from width and height */
296 if (!ret)
297 ret = reg_write(client, MT9V022_COLUMN_START, rect.left);
298 if (!ret)
299 ret = reg_write(client, MT9V022_ROW_START, rect.top);
300 if (!ret)
301 /* Default 94, Phytec driver says:
302 * "width + horizontal blank >= 660" */
303 ret = reg_write(client, MT9V022_HORIZONTAL_BLANKING,
304 rect.width > 660 - 43 ? 43 :
305 660 - rect.width);
306 if (!ret)
307 ret = reg_write(client, MT9V022_VERTICAL_BLANKING, 45);
308 if (!ret)
309 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect.width);
310 if (!ret)
311 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
312 rect.height + icd->y_skip_top);
313
314 if (ret < 0)
315 return ret;
316
317 dev_dbg(&client->dev, "Frame %ux%u pixel\n", rect.width, rect.height);
318
319 mt9v022->rect = rect;
320
321 return 0;
322 }
323
324 static int mt9v022_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
325 {
326 struct i2c_client *client = sd->priv;
327 struct mt9v022 *mt9v022 = to_mt9v022(client);
328
329 a->c = mt9v022->rect;
330 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
331
332 return 0;
333 }
334
335 static int mt9v022_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
336 {
337 a->bounds.left = MT9V022_COLUMN_SKIP;
338 a->bounds.top = MT9V022_ROW_SKIP;
339 a->bounds.width = MT9V022_MAX_WIDTH;
340 a->bounds.height = MT9V022_MAX_HEIGHT;
341 a->defrect = a->bounds;
342 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
343 a->pixelaspect.numerator = 1;
344 a->pixelaspect.denominator = 1;
345
346 return 0;
347 }
348
349 static int mt9v022_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
350 {
351 struct i2c_client *client = sd->priv;
352 struct mt9v022 *mt9v022 = to_mt9v022(client);
353 struct v4l2_pix_format *pix = &f->fmt.pix;
354
355 pix->width = mt9v022->rect.width;
356 pix->height = mt9v022->rect.height;
357 pix->pixelformat = mt9v022->fourcc;
358 pix->field = V4L2_FIELD_NONE;
359 pix->colorspace = V4L2_COLORSPACE_SRGB;
360
361 return 0;
362 }
363
364 static int mt9v022_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
365 {
366 struct i2c_client *client = sd->priv;
367 struct mt9v022 *mt9v022 = to_mt9v022(client);
368 struct v4l2_pix_format *pix = &f->fmt.pix;
369 struct v4l2_crop a = {
370 .c = {
371 .left = mt9v022->rect.left,
372 .top = mt9v022->rect.top,
373 .width = pix->width,
374 .height = pix->height,
375 },
376 };
377 int ret;
378
379 /* The caller provides a supported format, as verified per call to
380 * icd->try_fmt(), datawidth is from our supported format list */
381 switch (pix->pixelformat) {
382 case V4L2_PIX_FMT_GREY:
383 case V4L2_PIX_FMT_Y16:
384 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
385 return -EINVAL;
386 break;
387 case V4L2_PIX_FMT_SBGGR8:
388 case V4L2_PIX_FMT_SBGGR16:
389 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
390 return -EINVAL;
391 break;
392 case 0:
393 /* No format change, only geometry */
394 break;
395 default:
396 return -EINVAL;
397 }
398
399 /* No support for scaling on this camera, just crop. */
400 ret = mt9v022_s_crop(sd, &a);
401 if (!ret) {
402 pix->width = mt9v022->rect.width;
403 pix->height = mt9v022->rect.height;
404 mt9v022->fourcc = pix->pixelformat;
405 }
406
407 return ret;
408 }
409
410 static int mt9v022_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
411 {
412 struct i2c_client *client = sd->priv;
413 struct soc_camera_device *icd = client->dev.platform_data;
414 struct v4l2_pix_format *pix = &f->fmt.pix;
415 int align = pix->pixelformat == V4L2_PIX_FMT_SBGGR8 ||
416 pix->pixelformat == V4L2_PIX_FMT_SBGGR16;
417
418 v4l_bound_align_image(&pix->width, MT9V022_MIN_WIDTH,
419 MT9V022_MAX_WIDTH, align,
420 &pix->height, MT9V022_MIN_HEIGHT + icd->y_skip_top,
421 MT9V022_MAX_HEIGHT + icd->y_skip_top, align, 0);
422
423 return 0;
424 }
425
426 static int mt9v022_g_chip_ident(struct v4l2_subdev *sd,
427 struct v4l2_dbg_chip_ident *id)
428 {
429 struct i2c_client *client = sd->priv;
430 struct mt9v022 *mt9v022 = to_mt9v022(client);
431
432 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
433 return -EINVAL;
434
435 if (id->match.addr != client->addr)
436 return -ENODEV;
437
438 id->ident = mt9v022->model;
439 id->revision = 0;
440
441 return 0;
442 }
443
444 #ifdef CONFIG_VIDEO_ADV_DEBUG
445 static int mt9v022_g_register(struct v4l2_subdev *sd,
446 struct v4l2_dbg_register *reg)
447 {
448 struct i2c_client *client = sd->priv;
449
450 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
451 return -EINVAL;
452
453 if (reg->match.addr != client->addr)
454 return -ENODEV;
455
456 reg->size = 2;
457 reg->val = reg_read(client, reg->reg);
458
459 if (reg->val > 0xffff)
460 return -EIO;
461
462 return 0;
463 }
464
465 static int mt9v022_s_register(struct v4l2_subdev *sd,
466 struct v4l2_dbg_register *reg)
467 {
468 struct i2c_client *client = sd->priv;
469
470 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
471 return -EINVAL;
472
473 if (reg->match.addr != client->addr)
474 return -ENODEV;
475
476 if (reg_write(client, reg->reg, reg->val) < 0)
477 return -EIO;
478
479 return 0;
480 }
481 #endif
482
483 static const struct v4l2_queryctrl mt9v022_controls[] = {
484 {
485 .id = V4L2_CID_VFLIP,
486 .type = V4L2_CTRL_TYPE_BOOLEAN,
487 .name = "Flip Vertically",
488 .minimum = 0,
489 .maximum = 1,
490 .step = 1,
491 .default_value = 0,
492 }, {
493 .id = V4L2_CID_HFLIP,
494 .type = V4L2_CTRL_TYPE_BOOLEAN,
495 .name = "Flip Horizontally",
496 .minimum = 0,
497 .maximum = 1,
498 .step = 1,
499 .default_value = 0,
500 }, {
501 .id = V4L2_CID_GAIN,
502 .type = V4L2_CTRL_TYPE_INTEGER,
503 .name = "Analog Gain",
504 .minimum = 64,
505 .maximum = 127,
506 .step = 1,
507 .default_value = 64,
508 .flags = V4L2_CTRL_FLAG_SLIDER,
509 }, {
510 .id = V4L2_CID_EXPOSURE,
511 .type = V4L2_CTRL_TYPE_INTEGER,
512 .name = "Exposure",
513 .minimum = 1,
514 .maximum = 255,
515 .step = 1,
516 .default_value = 255,
517 .flags = V4L2_CTRL_FLAG_SLIDER,
518 }, {
519 .id = V4L2_CID_AUTOGAIN,
520 .type = V4L2_CTRL_TYPE_BOOLEAN,
521 .name = "Automatic Gain",
522 .minimum = 0,
523 .maximum = 1,
524 .step = 1,
525 .default_value = 1,
526 }, {
527 .id = V4L2_CID_EXPOSURE_AUTO,
528 .type = V4L2_CTRL_TYPE_BOOLEAN,
529 .name = "Automatic Exposure",
530 .minimum = 0,
531 .maximum = 1,
532 .step = 1,
533 .default_value = 1,
534 }
535 };
536
537 static struct soc_camera_ops mt9v022_ops = {
538 .set_bus_param = mt9v022_set_bus_param,
539 .query_bus_param = mt9v022_query_bus_param,
540 .controls = mt9v022_controls,
541 .num_controls = ARRAY_SIZE(mt9v022_controls),
542 };
543
544 static int mt9v022_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
545 {
546 struct i2c_client *client = sd->priv;
547 const struct v4l2_queryctrl *qctrl;
548 unsigned long range;
549 int data;
550
551 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
552
553 switch (ctrl->id) {
554 case V4L2_CID_VFLIP:
555 data = reg_read(client, MT9V022_READ_MODE);
556 if (data < 0)
557 return -EIO;
558 ctrl->value = !!(data & 0x10);
559 break;
560 case V4L2_CID_HFLIP:
561 data = reg_read(client, MT9V022_READ_MODE);
562 if (data < 0)
563 return -EIO;
564 ctrl->value = !!(data & 0x20);
565 break;
566 case V4L2_CID_EXPOSURE_AUTO:
567 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
568 if (data < 0)
569 return -EIO;
570 ctrl->value = !!(data & 0x1);
571 break;
572 case V4L2_CID_AUTOGAIN:
573 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
574 if (data < 0)
575 return -EIO;
576 ctrl->value = !!(data & 0x2);
577 break;
578 case V4L2_CID_GAIN:
579 data = reg_read(client, MT9V022_ANALOG_GAIN);
580 if (data < 0)
581 return -EIO;
582
583 range = qctrl->maximum - qctrl->minimum;
584 ctrl->value = ((data - 16) * range + 24) / 48 + qctrl->minimum;
585
586 break;
587 case V4L2_CID_EXPOSURE:
588 data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
589 if (data < 0)
590 return -EIO;
591
592 range = qctrl->maximum - qctrl->minimum;
593 ctrl->value = ((data - 1) * range + 239) / 479 + qctrl->minimum;
594
595 break;
596 }
597 return 0;
598 }
599
600 static int mt9v022_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
601 {
602 int data;
603 struct i2c_client *client = sd->priv;
604 const struct v4l2_queryctrl *qctrl;
605
606 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
607 if (!qctrl)
608 return -EINVAL;
609
610 switch (ctrl->id) {
611 case V4L2_CID_VFLIP:
612 if (ctrl->value)
613 data = reg_set(client, MT9V022_READ_MODE, 0x10);
614 else
615 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
616 if (data < 0)
617 return -EIO;
618 break;
619 case V4L2_CID_HFLIP:
620 if (ctrl->value)
621 data = reg_set(client, MT9V022_READ_MODE, 0x20);
622 else
623 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
624 if (data < 0)
625 return -EIO;
626 break;
627 case V4L2_CID_GAIN:
628 /* mt9v022 has minimum == default */
629 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
630 return -EINVAL;
631 else {
632 unsigned long range = qctrl->maximum - qctrl->minimum;
633 /* Valid values 16 to 64, 32 to 64 must be even. */
634 unsigned long gain = ((ctrl->value - qctrl->minimum) *
635 48 + range / 2) / range + 16;
636 if (gain >= 32)
637 gain &= ~1;
638 /* The user wants to set gain manually, hope, she
639 * knows, what she's doing... Switch AGC off. */
640
641 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
642 return -EIO;
643
644 dev_dbg(&client->dev, "Setting gain from %d to %lu\n",
645 reg_read(client, MT9V022_ANALOG_GAIN), gain);
646 if (reg_write(client, MT9V022_ANALOG_GAIN, gain) < 0)
647 return -EIO;
648 }
649 break;
650 case V4L2_CID_EXPOSURE:
651 /* mt9v022 has maximum == default */
652 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
653 return -EINVAL;
654 else {
655 unsigned long range = qctrl->maximum - qctrl->minimum;
656 unsigned long shutter = ((ctrl->value - qctrl->minimum) *
657 479 + range / 2) / range + 1;
658 /* The user wants to set shutter width manually, hope,
659 * she knows, what she's doing... Switch AEC off. */
660
661 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
662 return -EIO;
663
664 dev_dbg(&client->dev, "Shutter width from %d to %lu\n",
665 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
666 shutter);
667 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
668 shutter) < 0)
669 return -EIO;
670 }
671 break;
672 case V4L2_CID_AUTOGAIN:
673 if (ctrl->value)
674 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2);
675 else
676 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2);
677 if (data < 0)
678 return -EIO;
679 break;
680 case V4L2_CID_EXPOSURE_AUTO:
681 if (ctrl->value)
682 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
683 else
684 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
685 if (data < 0)
686 return -EIO;
687 break;
688 }
689 return 0;
690 }
691
692 /* Interface active, can use i2c. If it fails, it can indeed mean, that
693 * this wasn't our capture interface, so, we wait for the right one */
694 static int mt9v022_video_probe(struct soc_camera_device *icd,
695 struct i2c_client *client)
696 {
697 struct mt9v022 *mt9v022 = to_mt9v022(client);
698 struct soc_camera_link *icl = to_soc_camera_link(icd);
699 s32 data;
700 int ret;
701 unsigned long flags;
702
703 if (!icd->dev.parent ||
704 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
705 return -ENODEV;
706
707 /* Read out the chip version register */
708 data = reg_read(client, MT9V022_CHIP_VERSION);
709
710 /* must be 0x1311 or 0x1313 */
711 if (data != 0x1311 && data != 0x1313) {
712 ret = -ENODEV;
713 dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
714 data);
715 goto ei2c;
716 }
717
718 /* Soft reset */
719 ret = reg_write(client, MT9V022_RESET, 1);
720 if (ret < 0)
721 goto ei2c;
722 /* 15 clock cycles */
723 udelay(200);
724 if (reg_read(client, MT9V022_RESET)) {
725 dev_err(&client->dev, "Resetting MT9V022 failed!\n");
726 if (ret > 0)
727 ret = -EIO;
728 goto ei2c;
729 }
730
731 /* Set monochrome or colour sensor type */
732 if (sensor_type && (!strcmp("colour", sensor_type) ||
733 !strcmp("color", sensor_type))) {
734 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
735 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
736 icd->formats = mt9v022_colour_formats;
737 } else {
738 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
739 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
740 icd->formats = mt9v022_monochrome_formats;
741 }
742
743 if (ret < 0)
744 goto ei2c;
745
746 icd->num_formats = 0;
747
748 /*
749 * This is a 10bit sensor, so by default we only allow 10bit.
750 * The platform may support different bus widths due to
751 * different routing of the data lines.
752 */
753 if (icl->query_bus_param)
754 flags = icl->query_bus_param(icl);
755 else
756 flags = SOCAM_DATAWIDTH_10;
757
758 if (flags & SOCAM_DATAWIDTH_10)
759 icd->num_formats++;
760 else
761 icd->formats++;
762
763 if (flags & SOCAM_DATAWIDTH_8)
764 icd->num_formats++;
765
766 mt9v022->fourcc = icd->formats->fourcc;
767
768 dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
769 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
770 "monochrome" : "colour");
771
772 ret = mt9v022_init(client);
773 if (ret < 0)
774 dev_err(&client->dev, "Failed to initialise the camera\n");
775
776 ei2c:
777 return ret;
778 }
779
780 static void mt9v022_video_remove(struct soc_camera_device *icd)
781 {
782 struct soc_camera_link *icl = to_soc_camera_link(icd);
783
784 dev_dbg(&icd->dev, "Video removed: %p, %p\n",
785 icd->dev.parent, icd->vdev);
786 if (icl->free_bus)
787 icl->free_bus(icl);
788 }
789
790 static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
791 .g_ctrl = mt9v022_g_ctrl,
792 .s_ctrl = mt9v022_s_ctrl,
793 .g_chip_ident = mt9v022_g_chip_ident,
794 #ifdef CONFIG_VIDEO_ADV_DEBUG
795 .g_register = mt9v022_g_register,
796 .s_register = mt9v022_s_register,
797 #endif
798 };
799
800 static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
801 .s_stream = mt9v022_s_stream,
802 .s_fmt = mt9v022_s_fmt,
803 .g_fmt = mt9v022_g_fmt,
804 .try_fmt = mt9v022_try_fmt,
805 .s_crop = mt9v022_s_crop,
806 .g_crop = mt9v022_g_crop,
807 .cropcap = mt9v022_cropcap,
808 };
809
810 static struct v4l2_subdev_ops mt9v022_subdev_ops = {
811 .core = &mt9v022_subdev_core_ops,
812 .video = &mt9v022_subdev_video_ops,
813 };
814
815 static int mt9v022_probe(struct i2c_client *client,
816 const struct i2c_device_id *did)
817 {
818 struct mt9v022 *mt9v022;
819 struct soc_camera_device *icd = client->dev.platform_data;
820 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
821 struct soc_camera_link *icl;
822 int ret;
823
824 if (!icd) {
825 dev_err(&client->dev, "MT9V022: missing soc-camera data!\n");
826 return -EINVAL;
827 }
828
829 icl = to_soc_camera_link(icd);
830 if (!icl) {
831 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
832 return -EINVAL;
833 }
834
835 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
836 dev_warn(&adapter->dev,
837 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
838 return -EIO;
839 }
840
841 mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
842 if (!mt9v022)
843 return -ENOMEM;
844
845 v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
846
847 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
848
849 icd->ops = &mt9v022_ops;
850 /*
851 * MT9V022 _really_ corrupts the first read out line.
852 * TODO: verify on i.MX31
853 */
854 icd->y_skip_top = 1;
855
856 mt9v022->rect.left = MT9V022_COLUMN_SKIP;
857 mt9v022->rect.top = MT9V022_ROW_SKIP;
858 mt9v022->rect.width = MT9V022_MAX_WIDTH;
859 mt9v022->rect.height = MT9V022_MAX_HEIGHT;
860
861 ret = mt9v022_video_probe(icd, client);
862 if (ret) {
863 icd->ops = NULL;
864 i2c_set_clientdata(client, NULL);
865 kfree(mt9v022);
866 }
867
868 return ret;
869 }
870
871 static int mt9v022_remove(struct i2c_client *client)
872 {
873 struct mt9v022 *mt9v022 = to_mt9v022(client);
874 struct soc_camera_device *icd = client->dev.platform_data;
875
876 icd->ops = NULL;
877 mt9v022_video_remove(icd);
878 i2c_set_clientdata(client, NULL);
879 client->driver = NULL;
880 kfree(mt9v022);
881
882 return 0;
883 }
884 static const struct i2c_device_id mt9v022_id[] = {
885 { "mt9v022", 0 },
886 { }
887 };
888 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
889
890 static struct i2c_driver mt9v022_i2c_driver = {
891 .driver = {
892 .name = "mt9v022",
893 },
894 .probe = mt9v022_probe,
895 .remove = mt9v022_remove,
896 .id_table = mt9v022_id,
897 };
898
899 static int __init mt9v022_mod_init(void)
900 {
901 return i2c_add_driver(&mt9v022_i2c_driver);
902 }
903
904 static void __exit mt9v022_mod_exit(void)
905 {
906 i2c_del_driver(&mt9v022_i2c_driver);
907 }
908
909 module_init(mt9v022_mod_init);
910 module_exit(mt9v022_mod_exit);
911
912 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
913 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
914 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree