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Merge branch 'for-linus' of git://git.infradead.org/users/sameo/mfd-2.6
[linux-btrfs-devel.git] / drivers / media / video / ov6650.c
blob456d9ad9ae5aa01d7ce713e738ad93f5cdd2a773
1 /*
2 * V4L2 SoC Camera driver for OmniVision OV6650 Camera Sensor
3 *
4 * Copyright (C) 2010 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
5 *
6 * Based on OmniVision OV96xx Camera Driver
7 * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com>
8 *
9 * Based on ov772x camera driver:
10 * Copyright (C) 2008 Renesas Solutions Corp.
11 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
12 *
13 * Based on ov7670 and soc_camera_platform driver,
14 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
15 * Copyright (C) 2008 Magnus Damm
16 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
17 *
18 * Hardware specific bits initialy based on former work by Matt Callow
19 * drivers/media/video/omap/sensor_ov6650.c
20 * Copyright (C) 2006 Matt Callow
21 *
22 * This program is free software; you can redistribute it and/or modify
23 * it under the terms of the GNU General Public License version 2 as
24 * published by the Free Software Foundation.
25 */
26
27 #include <linux/bitops.h>
28 #include <linux/delay.h>
29 #include <linux/i2c.h>
30 #include <linux/slab.h>
31
32 #include <media/soc_camera.h>
33 #include <media/v4l2-chip-ident.h>
34
35
36 /* Register definitions */
37 #define REG_GAIN 0x00 /* range 00 - 3F */
38 #define REG_BLUE 0x01
39 #define REG_RED 0x02
40 #define REG_SAT 0x03 /* [7:4] saturation [0:3] reserved */
41 #define REG_HUE 0x04 /* [7:6] rsrvd [5] hue en [4:0] hue */
42
43 #define REG_BRT 0x06
44
45 #define REG_PIDH 0x0a
46 #define REG_PIDL 0x0b
47
48 #define REG_AECH 0x10
49 #define REG_CLKRC 0x11 /* Data Format and Internal Clock */
50 /* [7:6] Input system clock (MHz)*/
51 /* 00=8, 01=12, 10=16, 11=24 */
52 /* [5:0]: Internal Clock Pre-Scaler */
53 #define REG_COMA 0x12 /* [7] Reset */
54 #define REG_COMB 0x13
55 #define REG_COMC 0x14
56 #define REG_COMD 0x15
57 #define REG_COML 0x16
58 #define REG_HSTRT 0x17
59 #define REG_HSTOP 0x18
60 #define REG_VSTRT 0x19
61 #define REG_VSTOP 0x1a
62 #define REG_PSHFT 0x1b
63 #define REG_MIDH 0x1c
64 #define REG_MIDL 0x1d
65 #define REG_HSYNS 0x1e
66 #define REG_HSYNE 0x1f
67 #define REG_COME 0x20
68 #define REG_YOFF 0x21
69 #define REG_UOFF 0x22
70 #define REG_VOFF 0x23
71 #define REG_AEW 0x24
72 #define REG_AEB 0x25
73 #define REG_COMF 0x26
74 #define REG_COMG 0x27
75 #define REG_COMH 0x28
76 #define REG_COMI 0x29
77
78 #define REG_FRARL 0x2b
79 #define REG_COMJ 0x2c
80 #define REG_COMK 0x2d
81 #define REG_AVGY 0x2e
82 #define REG_REF0 0x2f
83 #define REG_REF1 0x30
84 #define REG_REF2 0x31
85 #define REG_FRAJH 0x32
86 #define REG_FRAJL 0x33
87 #define REG_FACT 0x34
88 #define REG_L1AEC 0x35
89 #define REG_AVGU 0x36
90 #define REG_AVGV 0x37
91
92 #define REG_SPCB 0x60
93 #define REG_SPCC 0x61
94 #define REG_GAM1 0x62
95 #define REG_GAM2 0x63
96 #define REG_GAM3 0x64
97 #define REG_SPCD 0x65
98
99 #define REG_SPCE 0x68
100 #define REG_ADCL 0x69
101
102 #define REG_RMCO 0x6c
103 #define REG_GMCO 0x6d
104 #define REG_BMCO 0x6e
105
106
107 /* Register bits, values, etc. */
108 #define OV6650_PIDH 0x66 /* high byte of product ID number */
109 #define OV6650_PIDL 0x50 /* low byte of product ID number */
110 #define OV6650_MIDH 0x7F /* high byte of mfg ID */
111 #define OV6650_MIDL 0xA2 /* low byte of mfg ID */
112
113 #define DEF_GAIN 0x00
114 #define DEF_BLUE 0x80
115 #define DEF_RED 0x80
116
117 #define SAT_SHIFT 4
118 #define SAT_MASK (0xf << SAT_SHIFT)
119 #define SET_SAT(x) (((x) << SAT_SHIFT) & SAT_MASK)
120
121 #define HUE_EN BIT(5)
122 #define HUE_MASK 0x1f
123 #define DEF_HUE 0x10
124 #define SET_HUE(x) (HUE_EN | ((x) & HUE_MASK))
125
126 #define DEF_AECH 0x4D
127
128 #define CLKRC_6MHz 0x00
129 #define CLKRC_12MHz 0x40
130 #define CLKRC_16MHz 0x80
131 #define CLKRC_24MHz 0xc0
132 #define CLKRC_DIV_MASK 0x3f
133 #define GET_CLKRC_DIV(x) (((x) & CLKRC_DIV_MASK) + 1)
134
135 #define COMA_RESET BIT(7)
136 #define COMA_QCIF BIT(5)
137 #define COMA_RAW_RGB BIT(4)
138 #define COMA_RGB BIT(3)
139 #define COMA_BW BIT(2)
140 #define COMA_WORD_SWAP BIT(1)
141 #define COMA_BYTE_SWAP BIT(0)
142 #define DEF_COMA 0x00
143
144 #define COMB_FLIP_V BIT(7)
145 #define COMB_FLIP_H BIT(5)
146 #define COMB_BAND_FILTER BIT(4)
147 #define COMB_AWB BIT(2)
148 #define COMB_AGC BIT(1)
149 #define COMB_AEC BIT(0)
150 #define DEF_COMB 0x5f
151
152 #define COML_ONE_CHANNEL BIT(7)
153
154 #define DEF_HSTRT 0x24
155 #define DEF_HSTOP 0xd4
156 #define DEF_VSTRT 0x04
157 #define DEF_VSTOP 0x94
158
159 #define COMF_HREF_LOW BIT(4)
160
161 #define COMJ_PCLK_RISING BIT(4)
162 #define COMJ_VSYNC_HIGH BIT(0)
163
164 /* supported resolutions */
165 #define W_QCIF (DEF_HSTOP - DEF_HSTRT)
166 #define W_CIF (W_QCIF << 1)
167 #define H_QCIF (DEF_VSTOP - DEF_VSTRT)
168 #define H_CIF (H_QCIF << 1)
169
170 #define FRAME_RATE_MAX 30
171
172
173 struct ov6650_reg {
174 u8 reg;
175 u8 val;
176 };
177
178 struct ov6650 {
179 struct v4l2_subdev subdev;
180
181 int gain;
182 int blue;
183 int red;
184 int saturation;
185 int hue;
186 int brightness;
187 int exposure;
188 int gamma;
189 int aec;
190 bool vflip;
191 bool hflip;
192 bool awb;
193 bool agc;
194 bool half_scale; /* scale down output by 2 */
195 struct v4l2_rect rect; /* sensor cropping window */
196 unsigned long pclk_limit; /* from host */
197 unsigned long pclk_max; /* from resolution and format */
198 struct v4l2_fract tpf; /* as requested with s_parm */
199 enum v4l2_mbus_pixelcode code;
200 enum v4l2_colorspace colorspace;
201 };
202
203
204 static enum v4l2_mbus_pixelcode ov6650_codes[] = {
205 V4L2_MBUS_FMT_YUYV8_2X8,
206 V4L2_MBUS_FMT_UYVY8_2X8,
207 V4L2_MBUS_FMT_YVYU8_2X8,
208 V4L2_MBUS_FMT_VYUY8_2X8,
209 V4L2_MBUS_FMT_SBGGR8_1X8,
210 V4L2_MBUS_FMT_Y8_1X8,
211 };
212
213 static const struct v4l2_queryctrl ov6650_controls[] = {
214 {
215 .id = V4L2_CID_AUTOGAIN,
216 .type = V4L2_CTRL_TYPE_BOOLEAN,
217 .name = "AGC",
218 .minimum = 0,
219 .maximum = 1,
220 .step = 1,
221 .default_value = 1,
222 },
223 {
224 .id = V4L2_CID_GAIN,
225 .type = V4L2_CTRL_TYPE_INTEGER,
226 .name = "Gain",
227 .minimum = 0,
228 .maximum = 0x3f,
229 .step = 1,
230 .default_value = DEF_GAIN,
231 },
232 {
233 .id = V4L2_CID_AUTO_WHITE_BALANCE,
234 .type = V4L2_CTRL_TYPE_BOOLEAN,
235 .name = "AWB",
236 .minimum = 0,
237 .maximum = 1,
238 .step = 1,
239 .default_value = 1,
240 },
241 {
242 .id = V4L2_CID_BLUE_BALANCE,
243 .type = V4L2_CTRL_TYPE_INTEGER,
244 .name = "Blue",
245 .minimum = 0,
246 .maximum = 0xff,
247 .step = 1,
248 .default_value = DEF_BLUE,
249 },
250 {
251 .id = V4L2_CID_RED_BALANCE,
252 .type = V4L2_CTRL_TYPE_INTEGER,
253 .name = "Red",
254 .minimum = 0,
255 .maximum = 0xff,
256 .step = 1,
257 .default_value = DEF_RED,
258 },
259 {
260 .id = V4L2_CID_SATURATION,
261 .type = V4L2_CTRL_TYPE_INTEGER,
262 .name = "Saturation",
263 .minimum = 0,
264 .maximum = 0xf,
265 .step = 1,
266 .default_value = 0x8,
267 },
268 {
269 .id = V4L2_CID_HUE,
270 .type = V4L2_CTRL_TYPE_INTEGER,
271 .name = "Hue",
272 .minimum = 0,
273 .maximum = HUE_MASK,
274 .step = 1,
275 .default_value = DEF_HUE,
276 },
277 {
278 .id = V4L2_CID_BRIGHTNESS,
279 .type = V4L2_CTRL_TYPE_INTEGER,
280 .name = "Brightness",
281 .minimum = 0,
282 .maximum = 0xff,
283 .step = 1,
284 .default_value = 0x80,
285 },
286 {
287 .id = V4L2_CID_EXPOSURE_AUTO,
288 .type = V4L2_CTRL_TYPE_INTEGER,
289 .name = "AEC",
290 .minimum = 0,
291 .maximum = 3,
292 .step = 1,
293 .default_value = 0,
294 },
295 {
296 .id = V4L2_CID_EXPOSURE,
297 .type = V4L2_CTRL_TYPE_INTEGER,
298 .name = "Exposure",
299 .minimum = 0,
300 .maximum = 0xff,
301 .step = 1,
302 .default_value = DEF_AECH,
303 },
304 {
305 .id = V4L2_CID_GAMMA,
306 .type = V4L2_CTRL_TYPE_INTEGER,
307 .name = "Gamma",
308 .minimum = 0,
309 .maximum = 0xff,
310 .step = 1,
311 .default_value = 0x12,
312 },
313 {
314 .id = V4L2_CID_VFLIP,
315 .type = V4L2_CTRL_TYPE_BOOLEAN,
316 .name = "Flip Vertically",
317 .minimum = 0,
318 .maximum = 1,
319 .step = 1,
320 .default_value = 0,
321 },
322 {
323 .id = V4L2_CID_HFLIP,
324 .type = V4L2_CTRL_TYPE_BOOLEAN,
325 .name = "Flip Horizontally",
326 .minimum = 0,
327 .maximum = 1,
328 .step = 1,
329 .default_value = 0,
330 },
331 };
332
333 /* read a register */
334 static int ov6650_reg_read(struct i2c_client *client, u8 reg, u8 *val)
335 {
336 int ret;
337 u8 data = reg;
338 struct i2c_msg msg = {
339 .addr = client->addr,
340 .flags = 0,
341 .len = 1,
342 .buf = &data,
343 };
344
345 ret = i2c_transfer(client->adapter, &msg, 1);
346 if (ret < 0)
347 goto err;
348
349 msg.flags = I2C_M_RD;
350 ret = i2c_transfer(client->adapter, &msg, 1);
351 if (ret < 0)
352 goto err;
353
354 *val = data;
355 return 0;
356
357 err:
358 dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
359 return ret;
360 }
361
362 /* write a register */
363 static int ov6650_reg_write(struct i2c_client *client, u8 reg, u8 val)
364 {
365 int ret;
366 unsigned char data[2] = { reg, val };
367 struct i2c_msg msg = {
368 .addr = client->addr,
369 .flags = 0,
370 .len = 2,
371 .buf = data,
372 };
373
374 ret = i2c_transfer(client->adapter, &msg, 1);
375 udelay(100);
376
377 if (ret < 0) {
378 dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
379 return ret;
380 }
381 return 0;
382 }
383
384
385 /* Read a register, alter its bits, write it back */
386 static int ov6650_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 mask)
387 {
388 u8 val;
389 int ret;
390
391 ret = ov6650_reg_read(client, reg, &val);
392 if (ret) {
393 dev_err(&client->dev,
394 "[Read]-Modify-Write of register 0x%02x failed!\n",
395 reg);
396 return ret;
397 }
398
399 val &= ~mask;
400 val |= set;
401
402 ret = ov6650_reg_write(client, reg, val);
403 if (ret)
404 dev_err(&client->dev,
405 "Read-Modify-[Write] of register 0x%02x failed!\n",
406 reg);
407
408 return ret;
409 }
410
411 static struct ov6650 *to_ov6650(const struct i2c_client *client)
412 {
413 return container_of(i2c_get_clientdata(client), struct ov6650, subdev);
414 }
415
416 /* Start/Stop streaming from the device */
417 static int ov6650_s_stream(struct v4l2_subdev *sd, int enable)
418 {
419 return 0;
420 }
421
422 /* Alter bus settings on camera side */
423 static int ov6650_set_bus_param(struct soc_camera_device *icd,
424 unsigned long flags)
425 {
426 struct soc_camera_link *icl = to_soc_camera_link(icd);
427 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
428 int ret;
429
430 flags = soc_camera_apply_sensor_flags(icl, flags);
431
432 if (flags & SOCAM_PCLK_SAMPLE_RISING)
433 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_PCLK_RISING, 0);
434 else
435 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_PCLK_RISING);
436 if (ret)
437 return ret;
438
439 if (flags & SOCAM_HSYNC_ACTIVE_LOW)
440 ret = ov6650_reg_rmw(client, REG_COMF, COMF_HREF_LOW, 0);
441 else
442 ret = ov6650_reg_rmw(client, REG_COMF, 0, COMF_HREF_LOW);
443 if (ret)
444 return ret;
445
446 if (flags & SOCAM_VSYNC_ACTIVE_HIGH)
447 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_VSYNC_HIGH, 0);
448 else
449 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_VSYNC_HIGH);
450
451 return ret;
452 }
453
454 /* Request bus settings on camera side */
455 static unsigned long ov6650_query_bus_param(struct soc_camera_device *icd)
456 {
457 struct soc_camera_link *icl = to_soc_camera_link(icd);
458
459 unsigned long flags = SOCAM_MASTER |
460 SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
461 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
462 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
463 SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATAWIDTH_8;
464
465 return soc_camera_apply_sensor_flags(icl, flags);
466 }
467
468 /* Get status of additional camera capabilities */
469 static int ov6650_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
470 {
471 struct i2c_client *client = v4l2_get_subdevdata(sd);
472 struct ov6650 *priv = to_ov6650(client);
473 uint8_t reg;
474 int ret = 0;
475
476 switch (ctrl->id) {
477 case V4L2_CID_AUTOGAIN:
478 ctrl->value = priv->agc;
479 break;
480 case V4L2_CID_GAIN:
481 if (priv->agc) {
482 ret = ov6650_reg_read(client, REG_GAIN, &reg);
483 ctrl->value = reg;
484 } else {
485 ctrl->value = priv->gain;
486 }
487 break;
488 case V4L2_CID_AUTO_WHITE_BALANCE:
489 ctrl->value = priv->awb;
490 break;
491 case V4L2_CID_BLUE_BALANCE:
492 if (priv->awb) {
493 ret = ov6650_reg_read(client, REG_BLUE, &reg);
494 ctrl->value = reg;
495 } else {
496 ctrl->value = priv->blue;
497 }
498 break;
499 case V4L2_CID_RED_BALANCE:
500 if (priv->awb) {
501 ret = ov6650_reg_read(client, REG_RED, &reg);
502 ctrl->value = reg;
503 } else {
504 ctrl->value = priv->red;
505 }
506 break;
507 case V4L2_CID_SATURATION:
508 ctrl->value = priv->saturation;
509 break;
510 case V4L2_CID_HUE:
511 ctrl->value = priv->hue;
512 break;
513 case V4L2_CID_BRIGHTNESS:
514 ctrl->value = priv->brightness;
515 break;
516 case V4L2_CID_EXPOSURE_AUTO:
517 ctrl->value = priv->aec;
518 break;
519 case V4L2_CID_EXPOSURE:
520 if (priv->aec) {
521 ret = ov6650_reg_read(client, REG_AECH, &reg);
522 ctrl->value = reg;
523 } else {
524 ctrl->value = priv->exposure;
525 }
526 break;
527 case V4L2_CID_GAMMA:
528 ctrl->value = priv->gamma;
529 break;
530 case V4L2_CID_VFLIP:
531 ctrl->value = priv->vflip;
532 break;
533 case V4L2_CID_HFLIP:
534 ctrl->value = priv->hflip;
535 break;
536 }
537 return ret;
538 }
539
540 /* Set status of additional camera capabilities */
541 static int ov6650_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
542 {
543 struct i2c_client *client = v4l2_get_subdevdata(sd);
544 struct ov6650 *priv = to_ov6650(client);
545 int ret = 0;
546
547 switch (ctrl->id) {
548 case V4L2_CID_AUTOGAIN:
549 ret = ov6650_reg_rmw(client, REG_COMB,
550 ctrl->value ? COMB_AGC : 0, COMB_AGC);
551 if (!ret)
552 priv->agc = ctrl->value;
553 break;
554 case V4L2_CID_GAIN:
555 ret = ov6650_reg_write(client, REG_GAIN, ctrl->value);
556 if (!ret)
557 priv->gain = ctrl->value;
558 break;
559 case V4L2_CID_AUTO_WHITE_BALANCE:
560 ret = ov6650_reg_rmw(client, REG_COMB,
561 ctrl->value ? COMB_AWB : 0, COMB_AWB);
562 if (!ret)
563 priv->awb = ctrl->value;
564 break;
565 case V4L2_CID_BLUE_BALANCE:
566 ret = ov6650_reg_write(client, REG_BLUE, ctrl->value);
567 if (!ret)
568 priv->blue = ctrl->value;
569 break;
570 case V4L2_CID_RED_BALANCE:
571 ret = ov6650_reg_write(client, REG_RED, ctrl->value);
572 if (!ret)
573 priv->red = ctrl->value;
574 break;
575 case V4L2_CID_SATURATION:
576 ret = ov6650_reg_rmw(client, REG_SAT, SET_SAT(ctrl->value),
577 SAT_MASK);
578 if (!ret)
579 priv->saturation = ctrl->value;
580 break;
581 case V4L2_CID_HUE:
582 ret = ov6650_reg_rmw(client, REG_HUE, SET_HUE(ctrl->value),
583 HUE_MASK);
584 if (!ret)
585 priv->hue = ctrl->value;
586 break;
587 case V4L2_CID_BRIGHTNESS:
588 ret = ov6650_reg_write(client, REG_BRT, ctrl->value);
589 if (!ret)
590 priv->brightness = ctrl->value;
591 break;
592 case V4L2_CID_EXPOSURE_AUTO:
593 switch (ctrl->value) {
594 case V4L2_EXPOSURE_AUTO:
595 ret = ov6650_reg_rmw(client, REG_COMB, COMB_AEC, 0);
596 break;
597 default:
598 ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_AEC);
599 break;
600 }
601 if (!ret)
602 priv->aec = ctrl->value;
603 break;
604 case V4L2_CID_EXPOSURE:
605 ret = ov6650_reg_write(client, REG_AECH, ctrl->value);
606 if (!ret)
607 priv->exposure = ctrl->value;
608 break;
609 case V4L2_CID_GAMMA:
610 ret = ov6650_reg_write(client, REG_GAM1, ctrl->value);
611 if (!ret)
612 priv->gamma = ctrl->value;
613 break;
614 case V4L2_CID_VFLIP:
615 ret = ov6650_reg_rmw(client, REG_COMB,
616 ctrl->value ? COMB_FLIP_V : 0, COMB_FLIP_V);
617 if (!ret)
618 priv->vflip = ctrl->value;
619 break;
620 case V4L2_CID_HFLIP:
621 ret = ov6650_reg_rmw(client, REG_COMB,
622 ctrl->value ? COMB_FLIP_H : 0, COMB_FLIP_H);
623 if (!ret)
624 priv->hflip = ctrl->value;
625 break;
626 }
627
628 return ret;
629 }
630
631 /* Get chip identification */
632 static int ov6650_g_chip_ident(struct v4l2_subdev *sd,
633 struct v4l2_dbg_chip_ident *id)
634 {
635 id->ident = V4L2_IDENT_OV6650;
636 id->revision = 0;
637
638 return 0;
639 }
640
641 #ifdef CONFIG_VIDEO_ADV_DEBUG
642 static int ov6650_get_register(struct v4l2_subdev *sd,
643 struct v4l2_dbg_register *reg)
644 {
645 struct i2c_client *client = v4l2_get_subdevdata(sd);
646 int ret;
647 u8 val;
648
649 if (reg->reg & ~0xff)
650 return -EINVAL;
651
652 reg->size = 1;
653
654 ret = ov6650_reg_read(client, reg->reg, &val);
655 if (!ret)
656 reg->val = (__u64)val;
657
658 return ret;
659 }
660
661 static int ov6650_set_register(struct v4l2_subdev *sd,
662 struct v4l2_dbg_register *reg)
663 {
664 struct i2c_client *client = v4l2_get_subdevdata(sd);
665
666 if (reg->reg & ~0xff || reg->val & ~0xff)
667 return -EINVAL;
668
669 return ov6650_reg_write(client, reg->reg, reg->val);
670 }
671 #endif
672
673 static int ov6650_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
674 {
675 struct i2c_client *client = v4l2_get_subdevdata(sd);
676 struct ov6650 *priv = to_ov6650(client);
677
678 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
679 a->c = priv->rect;
680
681 return 0;
682 }
683
684 static int ov6650_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
685 {
686 struct i2c_client *client = v4l2_get_subdevdata(sd);
687 struct ov6650 *priv = to_ov6650(client);
688 struct v4l2_rect *rect = &a->c;
689 int ret;
690
691 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
692 return -EINVAL;
693
694 rect->left = ALIGN(rect->left, 2);
695 rect->width = ALIGN(rect->width, 2);
696 rect->top = ALIGN(rect->top, 2);
697 rect->height = ALIGN(rect->height, 2);
698 soc_camera_limit_side(&rect->left, &rect->width,
699 DEF_HSTRT << 1, 2, W_CIF);
700 soc_camera_limit_side(&rect->top, &rect->height,
701 DEF_VSTRT << 1, 2, H_CIF);
702
703 ret = ov6650_reg_write(client, REG_HSTRT, rect->left >> 1);
704 if (!ret) {
705 priv->rect.left = rect->left;
706 ret = ov6650_reg_write(client, REG_HSTOP,
707 (rect->left + rect->width) >> 1);
708 }
709 if (!ret) {
710 priv->rect.width = rect->width;
711 ret = ov6650_reg_write(client, REG_VSTRT, rect->top >> 1);
712 }
713 if (!ret) {
714 priv->rect.top = rect->top;
715 ret = ov6650_reg_write(client, REG_VSTOP,
716 (rect->top + rect->height) >> 1);
717 }
718 if (!ret)
719 priv->rect.height = rect->height;
720
721 return ret;
722 }
723
724 static int ov6650_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
725 {
726 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
727 return -EINVAL;
728
729 a->bounds.left = DEF_HSTRT << 1;
730 a->bounds.top = DEF_VSTRT << 1;
731 a->bounds.width = W_CIF;
732 a->bounds.height = H_CIF;
733 a->defrect = a->bounds;
734 a->pixelaspect.numerator = 1;
735 a->pixelaspect.denominator = 1;
736
737 return 0;
738 }
739
740 static int ov6650_g_fmt(struct v4l2_subdev *sd,
741 struct v4l2_mbus_framefmt *mf)
742 {
743 struct i2c_client *client = v4l2_get_subdevdata(sd);
744 struct ov6650 *priv = to_ov6650(client);
745
746 mf->width = priv->rect.width >> priv->half_scale;
747 mf->height = priv->rect.height >> priv->half_scale;
748 mf->code = priv->code;
749 mf->colorspace = priv->colorspace;
750 mf->field = V4L2_FIELD_NONE;
751
752 return 0;
753 }
754
755 static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect)
756 {
757 return width > rect->width >> 1 || height > rect->height >> 1;
758 }
759
760 static u8 to_clkrc(struct v4l2_fract *timeperframe,
761 unsigned long pclk_limit, unsigned long pclk_max)
762 {
763 unsigned long pclk;
764
765 if (timeperframe->numerator && timeperframe->denominator)
766 pclk = pclk_max * timeperframe->denominator /
767 (FRAME_RATE_MAX * timeperframe->numerator);
768 else
769 pclk = pclk_max;
770
771 if (pclk_limit && pclk_limit < pclk)
772 pclk = pclk_limit;
773
774 return (pclk_max - 1) / pclk;
775 }
776
777 /* set the format we will capture in */
778 static int ov6650_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf)
779 {
780 struct i2c_client *client = v4l2_get_subdevdata(sd);
781 struct soc_camera_device *icd = client->dev.platform_data;
782 struct soc_camera_sense *sense = icd->sense;
783 struct ov6650 *priv = to_ov6650(client);
784 bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect);
785 struct v4l2_crop a = {
786 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
787 .c = {
788 .left = priv->rect.left + (priv->rect.width >> 1) -
789 (mf->width >> (1 - half_scale)),
790 .top = priv->rect.top + (priv->rect.height >> 1) -
791 (mf->height >> (1 - half_scale)),
792 .width = mf->width << half_scale,
793 .height = mf->height << half_scale,
794 },
795 };
796 enum v4l2_mbus_pixelcode code = mf->code;
797 unsigned long mclk, pclk;
798 u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask, clkrc;
799 int ret;
800
801 /* select color matrix configuration for given color encoding */
802 switch (code) {
803 case V4L2_MBUS_FMT_Y8_1X8:
804 dev_dbg(&client->dev, "pixel format GREY8_1X8\n");
805 coma_mask |= COMA_RGB | COMA_WORD_SWAP | COMA_BYTE_SWAP;
806 coma_set |= COMA_BW;
807 break;
808 case V4L2_MBUS_FMT_YUYV8_2X8:
809 dev_dbg(&client->dev, "pixel format YUYV8_2X8_LE\n");
810 coma_mask |= COMA_RGB | COMA_BW | COMA_BYTE_SWAP;
811 coma_set |= COMA_WORD_SWAP;
812 break;
813 case V4L2_MBUS_FMT_YVYU8_2X8:
814 dev_dbg(&client->dev, "pixel format YVYU8_2X8_LE (untested)\n");
815 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP |
816 COMA_BYTE_SWAP;
817 break;
818 case V4L2_MBUS_FMT_UYVY8_2X8:
819 dev_dbg(&client->dev, "pixel format YUYV8_2X8_BE\n");
820 if (half_scale) {
821 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
822 coma_set |= COMA_BYTE_SWAP;
823 } else {
824 coma_mask |= COMA_RGB | COMA_BW;
825 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
826 }
827 break;
828 case V4L2_MBUS_FMT_VYUY8_2X8:
829 dev_dbg(&client->dev, "pixel format YVYU8_2X8_BE (untested)\n");
830 if (half_scale) {
831 coma_mask |= COMA_RGB | COMA_BW;
832 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
833 } else {
834 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
835 coma_set |= COMA_BYTE_SWAP;
836 }
837 break;
838 case V4L2_MBUS_FMT_SBGGR8_1X8:
839 dev_dbg(&client->dev, "pixel format SBGGR8_1X8 (untested)\n");
840 coma_mask |= COMA_BW | COMA_BYTE_SWAP | COMA_WORD_SWAP;
841 coma_set |= COMA_RAW_RGB | COMA_RGB;
842 break;
843 default:
844 dev_err(&client->dev, "Pixel format not handled: 0x%x\n", code);
845 return -EINVAL;
846 }
847 priv->code = code;
848
849 if (code == V4L2_MBUS_FMT_Y8_1X8 ||
850 code == V4L2_MBUS_FMT_SBGGR8_1X8) {
851 coml_mask = COML_ONE_CHANNEL;
852 coml_set = 0;
853 priv->pclk_max = 4000000;
854 } else {
855 coml_mask = 0;
856 coml_set = COML_ONE_CHANNEL;
857 priv->pclk_max = 8000000;
858 }
859
860 if (code == V4L2_MBUS_FMT_SBGGR8_1X8)
861 priv->colorspace = V4L2_COLORSPACE_SRGB;
862 else if (code != 0)
863 priv->colorspace = V4L2_COLORSPACE_JPEG;
864
865 if (half_scale) {
866 dev_dbg(&client->dev, "max resolution: QCIF\n");
867 coma_set |= COMA_QCIF;
868 priv->pclk_max /= 2;
869 } else {
870 dev_dbg(&client->dev, "max resolution: CIF\n");
871 coma_mask |= COMA_QCIF;
872 }
873 priv->half_scale = half_scale;
874
875 if (sense) {
876 if (sense->master_clock == 8000000) {
877 dev_dbg(&client->dev, "8MHz input clock\n");
878 clkrc = CLKRC_6MHz;
879 } else if (sense->master_clock == 12000000) {
880 dev_dbg(&client->dev, "12MHz input clock\n");
881 clkrc = CLKRC_12MHz;
882 } else if (sense->master_clock == 16000000) {
883 dev_dbg(&client->dev, "16MHz input clock\n");
884 clkrc = CLKRC_16MHz;
885 } else if (sense->master_clock == 24000000) {
886 dev_dbg(&client->dev, "24MHz input clock\n");
887 clkrc = CLKRC_24MHz;
888 } else {
889 dev_err(&client->dev,
890 "unspported input clock, check platform data\n");
891 return -EINVAL;
892 }
893 mclk = sense->master_clock;
894 priv->pclk_limit = sense->pixel_clock_max;
895 } else {
896 clkrc = CLKRC_24MHz;
897 mclk = 24000000;
898 priv->pclk_limit = 0;
899 dev_dbg(&client->dev, "using default 24MHz input clock\n");
900 }
901
902 clkrc |= to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
903
904 pclk = priv->pclk_max / GET_CLKRC_DIV(clkrc);
905 dev_dbg(&client->dev, "pixel clock divider: %ld.%ld\n",
906 mclk / pclk, 10 * mclk % pclk / pclk);
907
908 ret = ov6650_s_crop(sd, &a);
909 if (!ret)
910 ret = ov6650_reg_rmw(client, REG_COMA, coma_set, coma_mask);
911 if (!ret)
912 ret = ov6650_reg_write(client, REG_CLKRC, clkrc);
913 if (!ret)
914 ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask);
915
916 if (!ret) {
917 mf->colorspace = priv->colorspace;
918 mf->width = priv->rect.width >> half_scale;
919 mf->height = priv->rect.height >> half_scale;
920 }
921
922 return ret;
923 }
924
925 static int ov6650_try_fmt(struct v4l2_subdev *sd,
926 struct v4l2_mbus_framefmt *mf)
927 {
928 struct i2c_client *client = v4l2_get_subdevdata(sd);
929 struct ov6650 *priv = to_ov6650(client);
930
931 if (is_unscaled_ok(mf->width, mf->height, &priv->rect))
932 v4l_bound_align_image(&mf->width, 2, W_CIF, 1,
933 &mf->height, 2, H_CIF, 1, 0);
934
935 mf->field = V4L2_FIELD_NONE;
936
937 switch (mf->code) {
938 case V4L2_MBUS_FMT_Y10_1X10:
939 mf->code = V4L2_MBUS_FMT_Y8_1X8;
940 case V4L2_MBUS_FMT_Y8_1X8:
941 case V4L2_MBUS_FMT_YVYU8_2X8:
942 case V4L2_MBUS_FMT_YUYV8_2X8:
943 case V4L2_MBUS_FMT_VYUY8_2X8:
944 case V4L2_MBUS_FMT_UYVY8_2X8:
945 mf->colorspace = V4L2_COLORSPACE_JPEG;
946 break;
947 default:
948 mf->code = V4L2_MBUS_FMT_SBGGR8_1X8;
949 case V4L2_MBUS_FMT_SBGGR8_1X8:
950 mf->colorspace = V4L2_COLORSPACE_SRGB;
951 break;
952 }
953
954 return 0;
955 }
956
957 static int ov6650_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
958 enum v4l2_mbus_pixelcode *code)
959 {
960 if (index >= ARRAY_SIZE(ov6650_codes))
961 return -EINVAL;
962
963 *code = ov6650_codes[index];
964 return 0;
965 }
966
967 static int ov6650_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
968 {
969 struct i2c_client *client = v4l2_get_subdevdata(sd);
970 struct ov6650 *priv = to_ov6650(client);
971 struct v4l2_captureparm *cp = &parms->parm.capture;
972
973 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
974 return -EINVAL;
975
976 memset(cp, 0, sizeof(*cp));
977 cp->capability = V4L2_CAP_TIMEPERFRAME;
978 cp->timeperframe.numerator = GET_CLKRC_DIV(to_clkrc(&priv->tpf,
979 priv->pclk_limit, priv->pclk_max));
980 cp->timeperframe.denominator = FRAME_RATE_MAX;
981
982 dev_dbg(&client->dev, "Frame interval: %u/%u s\n",
983 cp->timeperframe.numerator, cp->timeperframe.denominator);
984
985 return 0;
986 }
987
988 static int ov6650_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
989 {
990 struct i2c_client *client = v4l2_get_subdevdata(sd);
991 struct ov6650 *priv = to_ov6650(client);
992 struct v4l2_captureparm *cp = &parms->parm.capture;
993 struct v4l2_fract *tpf = &cp->timeperframe;
994 int div, ret;
995 u8 clkrc;
996
997 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
998 return -EINVAL;
999
1000 if (cp->extendedmode != 0)
1001 return -EINVAL;
1002
1003 if (tpf->numerator == 0 || tpf->denominator == 0)
1004 div = 1; /* Reset to full rate */
1005 else
1006 div = (tpf->numerator * FRAME_RATE_MAX) / tpf->denominator;
1007
1008 if (div == 0)
1009 div = 1;
1010 else if (div > GET_CLKRC_DIV(CLKRC_DIV_MASK))
1011 div = GET_CLKRC_DIV(CLKRC_DIV_MASK);
1012
1013 /*
1014 * Keep result to be used as tpf limit
1015 * for subseqent clock divider calculations
1016 */
1017 priv->tpf.numerator = div;
1018 priv->tpf.denominator = FRAME_RATE_MAX;
1019
1020 clkrc = to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
1021
1022 ret = ov6650_reg_rmw(client, REG_CLKRC, clkrc, CLKRC_DIV_MASK);
1023 if (!ret) {
1024 tpf->numerator = GET_CLKRC_DIV(clkrc);
1025 tpf->denominator = FRAME_RATE_MAX;
1026 }
1027
1028 return ret;
1029 }
1030
1031 /* Soft reset the camera. This has nothing to do with the RESET pin! */
1032 static int ov6650_reset(struct i2c_client *client)
1033 {
1034 int ret;
1035
1036 dev_dbg(&client->dev, "reset\n");
1037
1038 ret = ov6650_reg_rmw(client, REG_COMA, COMA_RESET, 0);
1039 if (ret)
1040 dev_err(&client->dev,
1041 "An error occurred while entering soft reset!\n");
1042
1043 return ret;
1044 }
1045
1046 /* program default register values */
1047 static int ov6650_prog_dflt(struct i2c_client *client)
1048 {
1049 int ret;
1050
1051 dev_dbg(&client->dev, "initializing\n");
1052
1053 ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */
1054 if (!ret)
1055 ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_BAND_FILTER);
1056
1057 return ret;
1058 }
1059
1060 static int ov6650_video_probe(struct soc_camera_device *icd,
1061 struct i2c_client *client)
1062 {
1063 u8 pidh, pidl, midh, midl;
1064 int ret = 0;
1065
1066 /*
1067 * check and show product ID and manufacturer ID
1068 */
1069 ret = ov6650_reg_read(client, REG_PIDH, &pidh);
1070 if (!ret)
1071 ret = ov6650_reg_read(client, REG_PIDL, &pidl);
1072 if (!ret)
1073 ret = ov6650_reg_read(client, REG_MIDH, &midh);
1074 if (!ret)
1075 ret = ov6650_reg_read(client, REG_MIDL, &midl);
1076
1077 if (ret)
1078 return ret;
1079
1080 if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) {
1081 dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n",
1082 pidh, pidl);
1083 return -ENODEV;
1084 }
1085
1086 dev_info(&client->dev,
1087 "ov6650 Product ID 0x%02x:0x%02x Manufacturer ID 0x%02x:0x%02x\n",
1088 pidh, pidl, midh, midl);
1089
1090 ret = ov6650_reset(client);
1091 if (!ret)
1092 ret = ov6650_prog_dflt(client);
1093
1094 return ret;
1095 }
1096
1097 static struct soc_camera_ops ov6650_ops = {
1098 .set_bus_param = ov6650_set_bus_param,
1099 .query_bus_param = ov6650_query_bus_param,
1100 .controls = ov6650_controls,
1101 .num_controls = ARRAY_SIZE(ov6650_controls),
1102 };
1103
1104 static struct v4l2_subdev_core_ops ov6650_core_ops = {
1105 .g_ctrl = ov6650_g_ctrl,
1106 .s_ctrl = ov6650_s_ctrl,
1107 .g_chip_ident = ov6650_g_chip_ident,
1108 #ifdef CONFIG_VIDEO_ADV_DEBUG
1109 .g_register = ov6650_get_register,
1110 .s_register = ov6650_set_register,
1111 #endif
1112 };
1113
1114 static struct v4l2_subdev_video_ops ov6650_video_ops = {
1115 .s_stream = ov6650_s_stream,
1116 .g_mbus_fmt = ov6650_g_fmt,
1117 .s_mbus_fmt = ov6650_s_fmt,
1118 .try_mbus_fmt = ov6650_try_fmt,
1119 .enum_mbus_fmt = ov6650_enum_fmt,
1120 .cropcap = ov6650_cropcap,
1121 .g_crop = ov6650_g_crop,
1122 .s_crop = ov6650_s_crop,
1123 .g_parm = ov6650_g_parm,
1124 .s_parm = ov6650_s_parm,
1125 };
1126
1127 static struct v4l2_subdev_ops ov6650_subdev_ops = {
1128 .core = &ov6650_core_ops,
1129 .video = &ov6650_video_ops,
1130 };
1131
1132 /*
1133 * i2c_driver function
1134 */
1135 static int ov6650_probe(struct i2c_client *client,
1136 const struct i2c_device_id *did)
1137 {
1138 struct ov6650 *priv;
1139 struct soc_camera_device *icd = client->dev.platform_data;
1140 struct soc_camera_link *icl;
1141 int ret;
1142
1143 if (!icd) {
1144 dev_err(&client->dev, "Missing soc-camera data!\n");
1145 return -EINVAL;
1146 }
1147
1148 icl = to_soc_camera_link(icd);
1149 if (!icl) {
1150 dev_err(&client->dev, "Missing platform_data for driver\n");
1151 return -EINVAL;
1152 }
1153
1154 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1155 if (!priv) {
1156 dev_err(&client->dev,
1157 "Failed to allocate memory for private data!\n");
1158 return -ENOMEM;
1159 }
1160
1161 v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops);
1162
1163 icd->ops = &ov6650_ops;
1164
1165 priv->rect.left = DEF_HSTRT << 1;
1166 priv->rect.top = DEF_VSTRT << 1;
1167 priv->rect.width = W_CIF;
1168 priv->rect.height = H_CIF;
1169 priv->half_scale = false;
1170 priv->code = V4L2_MBUS_FMT_YUYV8_2X8;
1171 priv->colorspace = V4L2_COLORSPACE_JPEG;
1172
1173 ret = ov6650_video_probe(icd, client);
1174
1175 if (ret) {
1176 icd->ops = NULL;
1177 kfree(priv);
1178 }
1179
1180 return ret;
1181 }
1182
1183 static int ov6650_remove(struct i2c_client *client)
1184 {
1185 struct ov6650 *priv = to_ov6650(client);
1186
1187 kfree(priv);
1188 return 0;
1189 }
1190
1191 static const struct i2c_device_id ov6650_id[] = {
1192 { "ov6650", 0 },
1193 { }
1194 };
1195 MODULE_DEVICE_TABLE(i2c, ov6650_id);
1196
1197 static struct i2c_driver ov6650_i2c_driver = {
1198 .driver = {
1199 .name = "ov6650",
1200 },
1201 .probe = ov6650_probe,
1202 .remove = ov6650_remove,
1203 .id_table = ov6650_id,
1204 };
1205
1206 static int __init ov6650_module_init(void)
1207 {
1208 return i2c_add_driver(&ov6650_i2c_driver);
1209 }
1210
1211 static void __exit ov6650_module_exit(void)
1212 {
1213 i2c_del_driver(&ov6650_i2c_driver);
1214 }
1215
1216 module_init(ov6650_module_init);
1217 module_exit(ov6650_module_exit);
1218
1219 MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV6650");
1220 MODULE_AUTHOR("Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>");
1221 MODULE_LICENSE("GPL v2");
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