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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / media / video / mt9v022.c
blob1a34d2993e946488e0bad10eae26e3124bcfff78
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 /*
22 * mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
23 * The platform has to define ctruct i2c_board_info objects and link to them
24 * from struct soc_camera_link
25 */
26
27 static char *sensor_type;
28 module_param(sensor_type, charp, S_IRUGO);
29 MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
30
31 /* mt9v022 selected register addresses */
32 #define MT9V022_CHIP_VERSION 0x00
33 #define MT9V022_COLUMN_START 0x01
34 #define MT9V022_ROW_START 0x02
35 #define MT9V022_WINDOW_HEIGHT 0x03
36 #define MT9V022_WINDOW_WIDTH 0x04
37 #define MT9V022_HORIZONTAL_BLANKING 0x05
38 #define MT9V022_VERTICAL_BLANKING 0x06
39 #define MT9V022_CHIP_CONTROL 0x07
40 #define MT9V022_SHUTTER_WIDTH1 0x08
41 #define MT9V022_SHUTTER_WIDTH2 0x09
42 #define MT9V022_SHUTTER_WIDTH_CTRL 0x0a
43 #define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b
44 #define MT9V022_RESET 0x0c
45 #define MT9V022_READ_MODE 0x0d
46 #define MT9V022_MONITOR_MODE 0x0e
47 #define MT9V022_PIXEL_OPERATION_MODE 0x0f
48 #define MT9V022_LED_OUT_CONTROL 0x1b
49 #define MT9V022_ADC_MODE_CONTROL 0x1c
50 #define MT9V022_ANALOG_GAIN 0x35
51 #define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47
52 #define MT9V022_PIXCLK_FV_LV 0x74
53 #define MT9V022_DIGITAL_TEST_PATTERN 0x7f
54 #define MT9V022_AEC_AGC_ENABLE 0xAF
55 #define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
56
57 /* Progressive scan, master, defaults */
58 #define MT9V022_CHIP_CONTROL_DEFAULT 0x188
59
60 #define MT9V022_MAX_WIDTH 752
61 #define MT9V022_MAX_HEIGHT 480
62 #define MT9V022_MIN_WIDTH 48
63 #define MT9V022_MIN_HEIGHT 32
64 #define MT9V022_COLUMN_SKIP 1
65 #define MT9V022_ROW_SKIP 4
66
67 /* MT9V022 has only one fixed colorspace per pixelcode */
68 struct mt9v022_datafmt {
69 enum v4l2_mbus_pixelcode code;
70 enum v4l2_colorspace colorspace;
71 };
72
73 /* Find a data format by a pixel code in an array */
74 static const struct mt9v022_datafmt *mt9v022_find_datafmt(
75 enum v4l2_mbus_pixelcode code, const struct mt9v022_datafmt *fmt,
76 int n)
77 {
78 int i;
79 for (i = 0; i < n; i++)
80 if (fmt[i].code == code)
81 return fmt + i;
82
83 return NULL;
84 }
85
86 static const struct mt9v022_datafmt mt9v022_colour_fmts[] = {
87 /*
88 * Order important: first natively supported,
89 * second supported with a GPIO extender
90 */
91 {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
92 {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
93 };
94
95 static const struct mt9v022_datafmt mt9v022_monochrome_fmts[] = {
96 /* Order important - see above */
97 {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
98 {V4L2_MBUS_FMT_GREY8_1X8, V4L2_COLORSPACE_JPEG},
99 };
100
101 struct mt9v022 {
102 struct v4l2_subdev subdev;
103 struct v4l2_rect rect; /* Sensor window */
104 const struct mt9v022_datafmt *fmt;
105 const struct mt9v022_datafmt *fmts;
106 int num_fmts;
107 int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
108 u16 chip_control;
109 unsigned short y_skip_top; /* Lines to skip at the top */
110 };
111
112 static struct mt9v022 *to_mt9v022(const struct i2c_client *client)
113 {
114 return container_of(i2c_get_clientdata(client), struct mt9v022, subdev);
115 }
116
117 static int reg_read(struct i2c_client *client, const u8 reg)
118 {
119 s32 data = i2c_smbus_read_word_data(client, reg);
120 return data < 0 ? data : swab16(data);
121 }
122
123 static int reg_write(struct i2c_client *client, const u8 reg,
124 const u16 data)
125 {
126 return i2c_smbus_write_word_data(client, reg, swab16(data));
127 }
128
129 static int reg_set(struct i2c_client *client, const u8 reg,
130 const u16 data)
131 {
132 int ret;
133
134 ret = reg_read(client, reg);
135 if (ret < 0)
136 return ret;
137 return reg_write(client, reg, ret | data);
138 }
139
140 static int reg_clear(struct i2c_client *client, const u8 reg,
141 const u16 data)
142 {
143 int ret;
144
145 ret = reg_read(client, reg);
146 if (ret < 0)
147 return ret;
148 return reg_write(client, reg, ret & ~data);
149 }
150
151 static int mt9v022_init(struct i2c_client *client)
152 {
153 struct mt9v022 *mt9v022 = to_mt9v022(client);
154 int ret;
155
156 /*
157 * Almost the default mode: master, parallel, simultaneous, and an
158 * undocumented bit 0x200, which is present in table 7, but not in 8,
159 * plus snapshot mode to disable scan for now
160 */
161 mt9v022->chip_control |= 0x10;
162 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
163 if (!ret)
164 ret = reg_write(client, MT9V022_READ_MODE, 0x300);
165
166 /* All defaults */
167 if (!ret)
168 /* AEC, AGC on */
169 ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
170 if (!ret)
171 ret = reg_write(client, MT9V022_ANALOG_GAIN, 16);
172 if (!ret)
173 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 480);
174 if (!ret)
175 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
176 if (!ret)
177 /* default - auto */
178 ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
179 if (!ret)
180 ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
181
182 return ret;
183 }
184
185 static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable)
186 {
187 struct i2c_client *client = sd->priv;
188 struct mt9v022 *mt9v022 = to_mt9v022(client);
189
190 if (enable)
191 /* Switch to master "normal" mode */
192 mt9v022->chip_control &= ~0x10;
193 else
194 /* Switch to snapshot mode */
195 mt9v022->chip_control |= 0x10;
196
197 if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
198 return -EIO;
199 return 0;
200 }
201
202 static int mt9v022_set_bus_param(struct soc_camera_device *icd,
203 unsigned long flags)
204 {
205 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
206 struct mt9v022 *mt9v022 = to_mt9v022(client);
207 struct soc_camera_link *icl = to_soc_camera_link(icd);
208 unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK;
209 int ret;
210 u16 pixclk = 0;
211
212 /* Only one width bit may be set */
213 if (!is_power_of_2(width_flag))
214 return -EINVAL;
215
216 if (icl->set_bus_param) {
217 ret = icl->set_bus_param(icl, width_flag);
218 if (ret)
219 return ret;
220 } else {
221 /*
222 * Without board specific bus width settings we only support the
223 * sensors native bus width
224 */
225 if (width_flag != SOCAM_DATAWIDTH_10)
226 return -EINVAL;
227 }
228
229 flags = soc_camera_apply_sensor_flags(icl, flags);
230
231 if (flags & SOCAM_PCLK_SAMPLE_RISING)
232 pixclk |= 0x10;
233
234 if (!(flags & SOCAM_HSYNC_ACTIVE_HIGH))
235 pixclk |= 0x1;
236
237 if (!(flags & SOCAM_VSYNC_ACTIVE_HIGH))
238 pixclk |= 0x2;
239
240 ret = reg_write(client, MT9V022_PIXCLK_FV_LV, pixclk);
241 if (ret < 0)
242 return ret;
243
244 if (!(flags & SOCAM_MASTER))
245 mt9v022->chip_control &= ~0x8;
246
247 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
248 if (ret < 0)
249 return ret;
250
251 dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
252 pixclk, mt9v022->chip_control);
253
254 return 0;
255 }
256
257 static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd)
258 {
259 struct soc_camera_link *icl = to_soc_camera_link(icd);
260 unsigned int flags = SOCAM_MASTER | SOCAM_SLAVE |
261 SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
262 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
263 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
264 SOCAM_DATA_ACTIVE_HIGH;
265
266 if (icl->query_bus_param)
267 flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK;
268 else
269 flags |= SOCAM_DATAWIDTH_10;
270
271 return soc_camera_apply_sensor_flags(icl, flags);
272 }
273
274 static int mt9v022_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
275 {
276 struct i2c_client *client = sd->priv;
277 struct mt9v022 *mt9v022 = to_mt9v022(client);
278 struct v4l2_rect rect = a->c;
279 int ret;
280
281 /* Bayer format - even size lengths */
282 if (mt9v022->fmts == mt9v022_colour_fmts) {
283 rect.width = ALIGN(rect.width, 2);
284 rect.height = ALIGN(rect.height, 2);
285 /* Let the user play with the starting pixel */
286 }
287
288 soc_camera_limit_side(&rect.left, &rect.width,
289 MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH);
290
291 soc_camera_limit_side(&rect.top, &rect.height,
292 MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT);
293
294 /* Like in example app. Contradicts the datasheet though */
295 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
296 if (ret >= 0) {
297 if (ret & 1) /* Autoexposure */
298 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
299 rect.height + mt9v022->y_skip_top + 43);
300 else
301 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
302 rect.height + mt9v022->y_skip_top + 43);
303 }
304 /* Setup frame format: defaults apart from width and height */
305 if (!ret)
306 ret = reg_write(client, MT9V022_COLUMN_START, rect.left);
307 if (!ret)
308 ret = reg_write(client, MT9V022_ROW_START, rect.top);
309 if (!ret)
310 /*
311 * Default 94, Phytec driver says:
312 * "width + horizontal blank >= 660"
313 */
314 ret = reg_write(client, MT9V022_HORIZONTAL_BLANKING,
315 rect.width > 660 - 43 ? 43 :
316 660 - rect.width);
317 if (!ret)
318 ret = reg_write(client, MT9V022_VERTICAL_BLANKING, 45);
319 if (!ret)
320 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect.width);
321 if (!ret)
322 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
323 rect.height + mt9v022->y_skip_top);
324
325 if (ret < 0)
326 return ret;
327
328 dev_dbg(&client->dev, "Frame %ux%u pixel\n", rect.width, rect.height);
329
330 mt9v022->rect = rect;
331
332 return 0;
333 }
334
335 static int mt9v022_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
336 {
337 struct i2c_client *client = sd->priv;
338 struct mt9v022 *mt9v022 = to_mt9v022(client);
339
340 a->c = mt9v022->rect;
341 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
342
343 return 0;
344 }
345
346 static int mt9v022_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
347 {
348 a->bounds.left = MT9V022_COLUMN_SKIP;
349 a->bounds.top = MT9V022_ROW_SKIP;
350 a->bounds.width = MT9V022_MAX_WIDTH;
351 a->bounds.height = MT9V022_MAX_HEIGHT;
352 a->defrect = a->bounds;
353 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
354 a->pixelaspect.numerator = 1;
355 a->pixelaspect.denominator = 1;
356
357 return 0;
358 }
359
360 static int mt9v022_g_fmt(struct v4l2_subdev *sd,
361 struct v4l2_mbus_framefmt *mf)
362 {
363 struct i2c_client *client = sd->priv;
364 struct mt9v022 *mt9v022 = to_mt9v022(client);
365
366 mf->width = mt9v022->rect.width;
367 mf->height = mt9v022->rect.height;
368 mf->code = mt9v022->fmt->code;
369 mf->colorspace = mt9v022->fmt->colorspace;
370 mf->field = V4L2_FIELD_NONE;
371
372 return 0;
373 }
374
375 static int mt9v022_s_fmt(struct v4l2_subdev *sd,
376 struct v4l2_mbus_framefmt *mf)
377 {
378 struct i2c_client *client = sd->priv;
379 struct mt9v022 *mt9v022 = to_mt9v022(client);
380 struct v4l2_crop a = {
381 .c = {
382 .left = mt9v022->rect.left,
383 .top = mt9v022->rect.top,
384 .width = mf->width,
385 .height = mf->height,
386 },
387 };
388 int ret;
389
390 /*
391 * The caller provides a supported format, as verified per call to
392 * icd->try_fmt(), datawidth is from our supported format list
393 */
394 switch (mf->code) {
395 case V4L2_MBUS_FMT_GREY8_1X8:
396 case V4L2_MBUS_FMT_Y10_1X10:
397 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
398 return -EINVAL;
399 break;
400 case V4L2_MBUS_FMT_SBGGR8_1X8:
401 case V4L2_MBUS_FMT_SBGGR10_1X10:
402 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
403 return -EINVAL;
404 break;
405 case 0:
406 /* No format change, only geometry */
407 break;
408 default:
409 return -EINVAL;
410 }
411
412 /* No support for scaling on this camera, just crop. */
413 ret = mt9v022_s_crop(sd, &a);
414 if (!ret) {
415 mf->width = mt9v022->rect.width;
416 mf->height = mt9v022->rect.height;
417 mt9v022->fmt = mt9v022_find_datafmt(mf->code,
418 mt9v022->fmts, mt9v022->num_fmts);
419 mf->colorspace = mt9v022->fmt->colorspace;
420 }
421
422 return ret;
423 }
424
425 static int mt9v022_try_fmt(struct v4l2_subdev *sd,
426 struct v4l2_mbus_framefmt *mf)
427 {
428 struct i2c_client *client = sd->priv;
429 struct mt9v022 *mt9v022 = to_mt9v022(client);
430 const struct mt9v022_datafmt *fmt;
431 int align = mf->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
432 mf->code == V4L2_MBUS_FMT_SBGGR10_1X10;
433
434 v4l_bound_align_image(&mf->width, MT9V022_MIN_WIDTH,
435 MT9V022_MAX_WIDTH, align,
436 &mf->height, MT9V022_MIN_HEIGHT + mt9v022->y_skip_top,
437 MT9V022_MAX_HEIGHT + mt9v022->y_skip_top, align, 0);
438
439 fmt = mt9v022_find_datafmt(mf->code, mt9v022->fmts,
440 mt9v022->num_fmts);
441 if (!fmt) {
442 fmt = mt9v022->fmt;
443 mf->code = fmt->code;
444 }
445
446 mf->colorspace = fmt->colorspace;
447
448 return 0;
449 }
450
451 static int mt9v022_g_chip_ident(struct v4l2_subdev *sd,
452 struct v4l2_dbg_chip_ident *id)
453 {
454 struct i2c_client *client = sd->priv;
455 struct mt9v022 *mt9v022 = to_mt9v022(client);
456
457 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
458 return -EINVAL;
459
460 if (id->match.addr != client->addr)
461 return -ENODEV;
462
463 id->ident = mt9v022->model;
464 id->revision = 0;
465
466 return 0;
467 }
468
469 #ifdef CONFIG_VIDEO_ADV_DEBUG
470 static int mt9v022_g_register(struct v4l2_subdev *sd,
471 struct v4l2_dbg_register *reg)
472 {
473 struct i2c_client *client = sd->priv;
474
475 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
476 return -EINVAL;
477
478 if (reg->match.addr != client->addr)
479 return -ENODEV;
480
481 reg->size = 2;
482 reg->val = reg_read(client, reg->reg);
483
484 if (reg->val > 0xffff)
485 return -EIO;
486
487 return 0;
488 }
489
490 static int mt9v022_s_register(struct v4l2_subdev *sd,
491 struct v4l2_dbg_register *reg)
492 {
493 struct i2c_client *client = sd->priv;
494
495 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
496 return -EINVAL;
497
498 if (reg->match.addr != client->addr)
499 return -ENODEV;
500
501 if (reg_write(client, reg->reg, reg->val) < 0)
502 return -EIO;
503
504 return 0;
505 }
506 #endif
507
508 static const struct v4l2_queryctrl mt9v022_controls[] = {
509 {
510 .id = V4L2_CID_VFLIP,
511 .type = V4L2_CTRL_TYPE_BOOLEAN,
512 .name = "Flip Vertically",
513 .minimum = 0,
514 .maximum = 1,
515 .step = 1,
516 .default_value = 0,
517 }, {
518 .id = V4L2_CID_HFLIP,
519 .type = V4L2_CTRL_TYPE_BOOLEAN,
520 .name = "Flip Horizontally",
521 .minimum = 0,
522 .maximum = 1,
523 .step = 1,
524 .default_value = 0,
525 }, {
526 .id = V4L2_CID_GAIN,
527 .type = V4L2_CTRL_TYPE_INTEGER,
528 .name = "Analog Gain",
529 .minimum = 64,
530 .maximum = 127,
531 .step = 1,
532 .default_value = 64,
533 .flags = V4L2_CTRL_FLAG_SLIDER,
534 }, {
535 .id = V4L2_CID_EXPOSURE,
536 .type = V4L2_CTRL_TYPE_INTEGER,
537 .name = "Exposure",
538 .minimum = 1,
539 .maximum = 255,
540 .step = 1,
541 .default_value = 255,
542 .flags = V4L2_CTRL_FLAG_SLIDER,
543 }, {
544 .id = V4L2_CID_AUTOGAIN,
545 .type = V4L2_CTRL_TYPE_BOOLEAN,
546 .name = "Automatic Gain",
547 .minimum = 0,
548 .maximum = 1,
549 .step = 1,
550 .default_value = 1,
551 }, {
552 .id = V4L2_CID_EXPOSURE_AUTO,
553 .type = V4L2_CTRL_TYPE_BOOLEAN,
554 .name = "Automatic Exposure",
555 .minimum = 0,
556 .maximum = 1,
557 .step = 1,
558 .default_value = 1,
559 }
560 };
561
562 static struct soc_camera_ops mt9v022_ops = {
563 .set_bus_param = mt9v022_set_bus_param,
564 .query_bus_param = mt9v022_query_bus_param,
565 .controls = mt9v022_controls,
566 .num_controls = ARRAY_SIZE(mt9v022_controls),
567 };
568
569 static int mt9v022_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
570 {
571 struct i2c_client *client = sd->priv;
572 const struct v4l2_queryctrl *qctrl;
573 unsigned long range;
574 int data;
575
576 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
577
578 switch (ctrl->id) {
579 case V4L2_CID_VFLIP:
580 data = reg_read(client, MT9V022_READ_MODE);
581 if (data < 0)
582 return -EIO;
583 ctrl->value = !!(data & 0x10);
584 break;
585 case V4L2_CID_HFLIP:
586 data = reg_read(client, MT9V022_READ_MODE);
587 if (data < 0)
588 return -EIO;
589 ctrl->value = !!(data & 0x20);
590 break;
591 case V4L2_CID_EXPOSURE_AUTO:
592 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
593 if (data < 0)
594 return -EIO;
595 ctrl->value = !!(data & 0x1);
596 break;
597 case V4L2_CID_AUTOGAIN:
598 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
599 if (data < 0)
600 return -EIO;
601 ctrl->value = !!(data & 0x2);
602 break;
603 case V4L2_CID_GAIN:
604 data = reg_read(client, MT9V022_ANALOG_GAIN);
605 if (data < 0)
606 return -EIO;
607
608 range = qctrl->maximum - qctrl->minimum;
609 ctrl->value = ((data - 16) * range + 24) / 48 + qctrl->minimum;
610
611 break;
612 case V4L2_CID_EXPOSURE:
613 data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
614 if (data < 0)
615 return -EIO;
616
617 range = qctrl->maximum - qctrl->minimum;
618 ctrl->value = ((data - 1) * range + 239) / 479 + qctrl->minimum;
619
620 break;
621 }
622 return 0;
623 }
624
625 static int mt9v022_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
626 {
627 int data;
628 struct i2c_client *client = sd->priv;
629 const struct v4l2_queryctrl *qctrl;
630
631 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
632 if (!qctrl)
633 return -EINVAL;
634
635 switch (ctrl->id) {
636 case V4L2_CID_VFLIP:
637 if (ctrl->value)
638 data = reg_set(client, MT9V022_READ_MODE, 0x10);
639 else
640 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
641 if (data < 0)
642 return -EIO;
643 break;
644 case V4L2_CID_HFLIP:
645 if (ctrl->value)
646 data = reg_set(client, MT9V022_READ_MODE, 0x20);
647 else
648 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
649 if (data < 0)
650 return -EIO;
651 break;
652 case V4L2_CID_GAIN:
653 /* mt9v022 has minimum == default */
654 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
655 return -EINVAL;
656 else {
657 unsigned long range = qctrl->maximum - qctrl->minimum;
658 /* Valid values 16 to 64, 32 to 64 must be even. */
659 unsigned long gain = ((ctrl->value - qctrl->minimum) *
660 48 + range / 2) / range + 16;
661 if (gain >= 32)
662 gain &= ~1;
663 /*
664 * The user wants to set gain manually, hope, she
665 * knows, what she's doing... Switch AGC off.
666 */
667
668 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
669 return -EIO;
670
671 dev_dbg(&client->dev, "Setting gain from %d to %lu\n",
672 reg_read(client, MT9V022_ANALOG_GAIN), gain);
673 if (reg_write(client, MT9V022_ANALOG_GAIN, gain) < 0)
674 return -EIO;
675 }
676 break;
677 case V4L2_CID_EXPOSURE:
678 /* mt9v022 has maximum == default */
679 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
680 return -EINVAL;
681 else {
682 unsigned long range = qctrl->maximum - qctrl->minimum;
683 unsigned long shutter = ((ctrl->value - qctrl->minimum) *
684 479 + range / 2) / range + 1;
685 /*
686 * The user wants to set shutter width manually, hope,
687 * she knows, what she's doing... Switch AEC off.
688 */
689
690 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
691 return -EIO;
692
693 dev_dbg(&client->dev, "Shutter width from %d to %lu\n",
694 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
695 shutter);
696 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
697 shutter) < 0)
698 return -EIO;
699 }
700 break;
701 case V4L2_CID_AUTOGAIN:
702 if (ctrl->value)
703 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2);
704 else
705 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2);
706 if (data < 0)
707 return -EIO;
708 break;
709 case V4L2_CID_EXPOSURE_AUTO:
710 if (ctrl->value)
711 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
712 else
713 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
714 if (data < 0)
715 return -EIO;
716 break;
717 }
718 return 0;
719 }
720
721 /*
722 * Interface active, can use i2c. If it fails, it can indeed mean, that
723 * this wasn't our capture interface, so, we wait for the right one
724 */
725 static int mt9v022_video_probe(struct soc_camera_device *icd,
726 struct i2c_client *client)
727 {
728 struct mt9v022 *mt9v022 = to_mt9v022(client);
729 struct soc_camera_link *icl = to_soc_camera_link(icd);
730 s32 data;
731 int ret;
732 unsigned long flags;
733
734 if (!icd->dev.parent ||
735 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
736 return -ENODEV;
737
738 /* Read out the chip version register */
739 data = reg_read(client, MT9V022_CHIP_VERSION);
740
741 /* must be 0x1311 or 0x1313 */
742 if (data != 0x1311 && data != 0x1313) {
743 ret = -ENODEV;
744 dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
745 data);
746 goto ei2c;
747 }
748
749 /* Soft reset */
750 ret = reg_write(client, MT9V022_RESET, 1);
751 if (ret < 0)
752 goto ei2c;
753 /* 15 clock cycles */
754 udelay(200);
755 if (reg_read(client, MT9V022_RESET)) {
756 dev_err(&client->dev, "Resetting MT9V022 failed!\n");
757 if (ret > 0)
758 ret = -EIO;
759 goto ei2c;
760 }
761
762 /* Set monochrome or colour sensor type */
763 if (sensor_type && (!strcmp("colour", sensor_type) ||
764 !strcmp("color", sensor_type))) {
765 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
766 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
767 mt9v022->fmts = mt9v022_colour_fmts;
768 } else {
769 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
770 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
771 mt9v022->fmts = mt9v022_monochrome_fmts;
772 }
773
774 if (ret < 0)
775 goto ei2c;
776
777 mt9v022->num_fmts = 0;
778
779 /*
780 * This is a 10bit sensor, so by default we only allow 10bit.
781 * The platform may support different bus widths due to
782 * different routing of the data lines.
783 */
784 if (icl->query_bus_param)
785 flags = icl->query_bus_param(icl);
786 else
787 flags = SOCAM_DATAWIDTH_10;
788
789 if (flags & SOCAM_DATAWIDTH_10)
790 mt9v022->num_fmts++;
791 else
792 mt9v022->fmts++;
793
794 if (flags & SOCAM_DATAWIDTH_8)
795 mt9v022->num_fmts++;
796
797 mt9v022->fmt = &mt9v022->fmts[0];
798
799 dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
800 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
801 "monochrome" : "colour");
802
803 ret = mt9v022_init(client);
804 if (ret < 0)
805 dev_err(&client->dev, "Failed to initialise the camera\n");
806
807 ei2c:
808 return ret;
809 }
810
811 static void mt9v022_video_remove(struct soc_camera_device *icd)
812 {
813 struct soc_camera_link *icl = to_soc_camera_link(icd);
814
815 dev_dbg(&icd->dev, "Video removed: %p, %p\n",
816 icd->dev.parent, icd->vdev);
817 if (icl->free_bus)
818 icl->free_bus(icl);
819 }
820
821 static int mt9v022_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
822 {
823 struct i2c_client *client = sd->priv;
824 struct mt9v022 *mt9v022 = to_mt9v022(client);
825
826 *lines = mt9v022->y_skip_top;
827
828 return 0;
829 }
830
831 static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
832 .g_ctrl = mt9v022_g_ctrl,
833 .s_ctrl = mt9v022_s_ctrl,
834 .g_chip_ident = mt9v022_g_chip_ident,
835 #ifdef CONFIG_VIDEO_ADV_DEBUG
836 .g_register = mt9v022_g_register,
837 .s_register = mt9v022_s_register,
838 #endif
839 };
840
841 static int mt9v022_enum_fmt(struct v4l2_subdev *sd, int index,
842 enum v4l2_mbus_pixelcode *code)
843 {
844 struct i2c_client *client = sd->priv;
845 struct mt9v022 *mt9v022 = to_mt9v022(client);
846
847 if ((unsigned int)index >= mt9v022->num_fmts)
848 return -EINVAL;
849
850 *code = mt9v022->fmts[index].code;
851 return 0;
852 }
853
854 static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
855 .s_stream = mt9v022_s_stream,
856 .s_mbus_fmt = mt9v022_s_fmt,
857 .g_mbus_fmt = mt9v022_g_fmt,
858 .try_mbus_fmt = mt9v022_try_fmt,
859 .s_crop = mt9v022_s_crop,
860 .g_crop = mt9v022_g_crop,
861 .cropcap = mt9v022_cropcap,
862 .enum_mbus_fmt = mt9v022_enum_fmt,
863 };
864
865 static struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = {
866 .g_skip_top_lines = mt9v022_g_skip_top_lines,
867 };
868
869 static struct v4l2_subdev_ops mt9v022_subdev_ops = {
870 .core = &mt9v022_subdev_core_ops,
871 .video = &mt9v022_subdev_video_ops,
872 .sensor = &mt9v022_subdev_sensor_ops,
873 };
874
875 static int mt9v022_probe(struct i2c_client *client,
876 const struct i2c_device_id *did)
877 {
878 struct mt9v022 *mt9v022;
879 struct soc_camera_device *icd = client->dev.platform_data;
880 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
881 struct soc_camera_link *icl;
882 int ret;
883
884 if (!icd) {
885 dev_err(&client->dev, "MT9V022: missing soc-camera data!\n");
886 return -EINVAL;
887 }
888
889 icl = to_soc_camera_link(icd);
890 if (!icl) {
891 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
892 return -EINVAL;
893 }
894
895 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
896 dev_warn(&adapter->dev,
897 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
898 return -EIO;
899 }
900
901 mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
902 if (!mt9v022)
903 return -ENOMEM;
904
905 v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
906
907 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
908
909 icd->ops = &mt9v022_ops;
910 /*
911 * MT9V022 _really_ corrupts the first read out line.
912 * TODO: verify on i.MX31
913 */
914 mt9v022->y_skip_top = 1;
915 mt9v022->rect.left = MT9V022_COLUMN_SKIP;
916 mt9v022->rect.top = MT9V022_ROW_SKIP;
917 mt9v022->rect.width = MT9V022_MAX_WIDTH;
918 mt9v022->rect.height = MT9V022_MAX_HEIGHT;
919
920 ret = mt9v022_video_probe(icd, client);
921 if (ret) {
922 icd->ops = NULL;
923 i2c_set_clientdata(client, NULL);
924 kfree(mt9v022);
925 }
926
927 return ret;
928 }
929
930 static int mt9v022_remove(struct i2c_client *client)
931 {
932 struct mt9v022 *mt9v022 = to_mt9v022(client);
933 struct soc_camera_device *icd = client->dev.platform_data;
934
935 icd->ops = NULL;
936 mt9v022_video_remove(icd);
937 i2c_set_clientdata(client, NULL);
938 client->driver = NULL;
939 kfree(mt9v022);
940
941 return 0;
942 }
943 static const struct i2c_device_id mt9v022_id[] = {
944 { "mt9v022", 0 },
945 { }
946 };
947 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
948
949 static struct i2c_driver mt9v022_i2c_driver = {
950 .driver = {
951 .name = "mt9v022",
952 },
953 .probe = mt9v022_probe,
954 .remove = mt9v022_remove,
955 .id_table = mt9v022_id,
956 };
957
958 static int __init mt9v022_mod_init(void)
959 {
960 return i2c_add_driver(&mt9v022_i2c_driver);
961 }
962
963 static void __exit mt9v022_mod_exit(void)
964 {
965 i2c_del_driver(&mt9v022_i2c_driver);
966 }
967
968 module_init(mt9v022_mod_init);
969 module_exit(mt9v022_mod_exit);
970
971 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
972 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
973 MODULE_LICENSE("GPL");