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[media] ov6650: convert to the control framework
[linux-2.6/libata-dev.git] / drivers / media / video / ov6650.c
blobefa45132c992fd7189afc608886ecebf0e938d1d
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/soc_mediabus.h>
34 #include <media/v4l2-chip-ident.h>
35 #include <media/v4l2-ctrls.h>
36
37 /* Register definitions */
38 #define REG_GAIN 0x00 /* range 00 - 3F */
39 #define REG_BLUE 0x01
40 #define REG_RED 0x02
41 #define REG_SAT 0x03 /* [7:4] saturation [0:3] reserved */
42 #define REG_HUE 0x04 /* [7:6] rsrvd [5] hue en [4:0] hue */
43
44 #define REG_BRT 0x06
45
46 #define REG_PIDH 0x0a
47 #define REG_PIDL 0x0b
48
49 #define REG_AECH 0x10
50 #define REG_CLKRC 0x11 /* Data Format and Internal Clock */
51 /* [7:6] Input system clock (MHz)*/
52 /* 00=8, 01=12, 10=16, 11=24 */
53 /* [5:0]: Internal Clock Pre-Scaler */
54 #define REG_COMA 0x12 /* [7] Reset */
55 #define REG_COMB 0x13
56 #define REG_COMC 0x14
57 #define REG_COMD 0x15
58 #define REG_COML 0x16
59 #define REG_HSTRT 0x17
60 #define REG_HSTOP 0x18
61 #define REG_VSTRT 0x19
62 #define REG_VSTOP 0x1a
63 #define REG_PSHFT 0x1b
64 #define REG_MIDH 0x1c
65 #define REG_MIDL 0x1d
66 #define REG_HSYNS 0x1e
67 #define REG_HSYNE 0x1f
68 #define REG_COME 0x20
69 #define REG_YOFF 0x21
70 #define REG_UOFF 0x22
71 #define REG_VOFF 0x23
72 #define REG_AEW 0x24
73 #define REG_AEB 0x25
74 #define REG_COMF 0x26
75 #define REG_COMG 0x27
76 #define REG_COMH 0x28
77 #define REG_COMI 0x29
78
79 #define REG_FRARL 0x2b
80 #define REG_COMJ 0x2c
81 #define REG_COMK 0x2d
82 #define REG_AVGY 0x2e
83 #define REG_REF0 0x2f
84 #define REG_REF1 0x30
85 #define REG_REF2 0x31
86 #define REG_FRAJH 0x32
87 #define REG_FRAJL 0x33
88 #define REG_FACT 0x34
89 #define REG_L1AEC 0x35
90 #define REG_AVGU 0x36
91 #define REG_AVGV 0x37
92
93 #define REG_SPCB 0x60
94 #define REG_SPCC 0x61
95 #define REG_GAM1 0x62
96 #define REG_GAM2 0x63
97 #define REG_GAM3 0x64
98 #define REG_SPCD 0x65
99
100 #define REG_SPCE 0x68
101 #define REG_ADCL 0x69
102
103 #define REG_RMCO 0x6c
104 #define REG_GMCO 0x6d
105 #define REG_BMCO 0x6e
106
107
108 /* Register bits, values, etc. */
109 #define OV6650_PIDH 0x66 /* high byte of product ID number */
110 #define OV6650_PIDL 0x50 /* low byte of product ID number */
111 #define OV6650_MIDH 0x7F /* high byte of mfg ID */
112 #define OV6650_MIDL 0xA2 /* low byte of mfg ID */
113
114 #define DEF_GAIN 0x00
115 #define DEF_BLUE 0x80
116 #define DEF_RED 0x80
117
118 #define SAT_SHIFT 4
119 #define SAT_MASK (0xf << SAT_SHIFT)
120 #define SET_SAT(x) (((x) << SAT_SHIFT) & SAT_MASK)
121
122 #define HUE_EN BIT(5)
123 #define HUE_MASK 0x1f
124 #define DEF_HUE 0x10
125 #define SET_HUE(x) (HUE_EN | ((x) & HUE_MASK))
126
127 #define DEF_AECH 0x4D
128
129 #define CLKRC_6MHz 0x00
130 #define CLKRC_12MHz 0x40
131 #define CLKRC_16MHz 0x80
132 #define CLKRC_24MHz 0xc0
133 #define CLKRC_DIV_MASK 0x3f
134 #define GET_CLKRC_DIV(x) (((x) & CLKRC_DIV_MASK) + 1)
135
136 #define COMA_RESET BIT(7)
137 #define COMA_QCIF BIT(5)
138 #define COMA_RAW_RGB BIT(4)
139 #define COMA_RGB BIT(3)
140 #define COMA_BW BIT(2)
141 #define COMA_WORD_SWAP BIT(1)
142 #define COMA_BYTE_SWAP BIT(0)
143 #define DEF_COMA 0x00
144
145 #define COMB_FLIP_V BIT(7)
146 #define COMB_FLIP_H BIT(5)
147 #define COMB_BAND_FILTER BIT(4)
148 #define COMB_AWB BIT(2)
149 #define COMB_AGC BIT(1)
150 #define COMB_AEC BIT(0)
151 #define DEF_COMB 0x5f
152
153 #define COML_ONE_CHANNEL BIT(7)
154
155 #define DEF_HSTRT 0x24
156 #define DEF_HSTOP 0xd4
157 #define DEF_VSTRT 0x04
158 #define DEF_VSTOP 0x94
159
160 #define COMF_HREF_LOW BIT(4)
161
162 #define COMJ_PCLK_RISING BIT(4)
163 #define COMJ_VSYNC_HIGH BIT(0)
164
165 /* supported resolutions */
166 #define W_QCIF (DEF_HSTOP - DEF_HSTRT)
167 #define W_CIF (W_QCIF << 1)
168 #define H_QCIF (DEF_VSTOP - DEF_VSTRT)
169 #define H_CIF (H_QCIF << 1)
170
171 #define FRAME_RATE_MAX 30
172
173
174 struct ov6650_reg {
175 u8 reg;
176 u8 val;
177 };
178
179 struct ov6650 {
180 struct v4l2_subdev subdev;
181 struct v4l2_ctrl_handler hdl;
182 struct {
183 /* exposure/autoexposure cluster */
184 struct v4l2_ctrl *autoexposure;
185 struct v4l2_ctrl *exposure;
186 };
187 struct {
188 /* gain/autogain cluster */
189 struct v4l2_ctrl *autogain;
190 struct v4l2_ctrl *gain;
191 };
192 struct {
193 /* blue/red/autowhitebalance cluster */
194 struct v4l2_ctrl *autowb;
195 struct v4l2_ctrl *blue;
196 struct v4l2_ctrl *red;
197 };
198 bool half_scale; /* scale down output by 2 */
199 struct v4l2_rect rect; /* sensor cropping window */
200 unsigned long pclk_limit; /* from host */
201 unsigned long pclk_max; /* from resolution and format */
202 struct v4l2_fract tpf; /* as requested with s_parm */
203 enum v4l2_mbus_pixelcode code;
204 enum v4l2_colorspace colorspace;
205 };
206
207
208 static enum v4l2_mbus_pixelcode ov6650_codes[] = {
209 V4L2_MBUS_FMT_YUYV8_2X8,
210 V4L2_MBUS_FMT_UYVY8_2X8,
211 V4L2_MBUS_FMT_YVYU8_2X8,
212 V4L2_MBUS_FMT_VYUY8_2X8,
213 V4L2_MBUS_FMT_SBGGR8_1X8,
214 V4L2_MBUS_FMT_Y8_1X8,
215 };
216
217 /* read a register */
218 static int ov6650_reg_read(struct i2c_client *client, u8 reg, u8 *val)
219 {
220 int ret;
221 u8 data = reg;
222 struct i2c_msg msg = {
223 .addr = client->addr,
224 .flags = 0,
225 .len = 1,
226 .buf = &data,
227 };
228
229 ret = i2c_transfer(client->adapter, &msg, 1);
230 if (ret < 0)
231 goto err;
232
233 msg.flags = I2C_M_RD;
234 ret = i2c_transfer(client->adapter, &msg, 1);
235 if (ret < 0)
236 goto err;
237
238 *val = data;
239 return 0;
240
241 err:
242 dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
243 return ret;
244 }
245
246 /* write a register */
247 static int ov6650_reg_write(struct i2c_client *client, u8 reg, u8 val)
248 {
249 int ret;
250 unsigned char data[2] = { reg, val };
251 struct i2c_msg msg = {
252 .addr = client->addr,
253 .flags = 0,
254 .len = 2,
255 .buf = data,
256 };
257
258 ret = i2c_transfer(client->adapter, &msg, 1);
259 udelay(100);
260
261 if (ret < 0) {
262 dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
263 return ret;
264 }
265 return 0;
266 }
267
268
269 /* Read a register, alter its bits, write it back */
270 static int ov6650_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 mask)
271 {
272 u8 val;
273 int ret;
274
275 ret = ov6650_reg_read(client, reg, &val);
276 if (ret) {
277 dev_err(&client->dev,
278 "[Read]-Modify-Write of register 0x%02x failed!\n",
279 reg);
280 return ret;
281 }
282
283 val &= ~mask;
284 val |= set;
285
286 ret = ov6650_reg_write(client, reg, val);
287 if (ret)
288 dev_err(&client->dev,
289 "Read-Modify-[Write] of register 0x%02x failed!\n",
290 reg);
291
292 return ret;
293 }
294
295 static struct ov6650 *to_ov6650(const struct i2c_client *client)
296 {
297 return container_of(i2c_get_clientdata(client), struct ov6650, subdev);
298 }
299
300 /* Start/Stop streaming from the device */
301 static int ov6650_s_stream(struct v4l2_subdev *sd, int enable)
302 {
303 return 0;
304 }
305
306 /* Get status of additional camera capabilities */
307 static int ov6550_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
308 {
309 struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl);
310 struct v4l2_subdev *sd = &priv->subdev;
311 struct i2c_client *client = v4l2_get_subdevdata(sd);
312 uint8_t reg, reg2;
313 int ret = 0;
314
315 switch (ctrl->id) {
316 case V4L2_CID_AUTOGAIN:
317 ret = ov6650_reg_read(client, REG_GAIN, &reg);
318 if (!ret)
319 priv->gain->val = reg;
320 return ret;
321 case V4L2_CID_AUTO_WHITE_BALANCE:
322 ret = ov6650_reg_read(client, REG_BLUE, &reg);
323 if (!ret)
324 ret = ov6650_reg_read(client, REG_RED, &reg2);
325 if (!ret) {
326 priv->blue->val = reg;
327 priv->red->val = reg2;
328 }
329 return ret;
330 case V4L2_CID_EXPOSURE_AUTO:
331 ret = ov6650_reg_read(client, REG_AECH, &reg);
332 if (!ret)
333 priv->exposure->val = reg;
334 return ret;
335 }
336 return -EINVAL;
337 }
338
339 /* Set status of additional camera capabilities */
340 static int ov6550_s_ctrl(struct v4l2_ctrl *ctrl)
341 {
342 struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl);
343 struct v4l2_subdev *sd = &priv->subdev;
344 struct i2c_client *client = v4l2_get_subdevdata(sd);
345 int ret = 0;
346
347 switch (ctrl->id) {
348 case V4L2_CID_AUTOGAIN:
349 ret = ov6650_reg_rmw(client, REG_COMB,
350 ctrl->val ? COMB_AGC : 0, COMB_AGC);
351 if (!ret && !ctrl->val)
352 ret = ov6650_reg_write(client, REG_GAIN, priv->gain->val);
353 return ret;
354 case V4L2_CID_AUTO_WHITE_BALANCE:
355 ret = ov6650_reg_rmw(client, REG_COMB,
356 ctrl->val ? COMB_AWB : 0, COMB_AWB);
357 if (!ret && !ctrl->val) {
358 ret = ov6650_reg_write(client, REG_BLUE, priv->blue->val);
359 if (!ret)
360 ret = ov6650_reg_write(client, REG_RED,
361 priv->red->val);
362 }
363 return ret;
364 case V4L2_CID_SATURATION:
365 return ov6650_reg_rmw(client, REG_SAT, SET_SAT(ctrl->val),
366 SAT_MASK);
367 case V4L2_CID_HUE:
368 return ov6650_reg_rmw(client, REG_HUE, SET_HUE(ctrl->val),
369 HUE_MASK);
370 case V4L2_CID_BRIGHTNESS:
371 return ov6650_reg_write(client, REG_BRT, ctrl->val);
372 case V4L2_CID_EXPOSURE_AUTO:
373 if (ctrl->val == V4L2_EXPOSURE_AUTO)
374 ret = ov6650_reg_rmw(client, REG_COMB, COMB_AEC, 0);
375 else
376 ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_AEC);
377 if (!ret && ctrl->val == V4L2_EXPOSURE_MANUAL)
378 ret = ov6650_reg_write(client, REG_AECH,
379 priv->exposure->val);
380 return ret;
381 case V4L2_CID_GAMMA:
382 return ov6650_reg_write(client, REG_GAM1, ctrl->val);
383 case V4L2_CID_VFLIP:
384 return ov6650_reg_rmw(client, REG_COMB,
385 ctrl->val ? COMB_FLIP_V : 0, COMB_FLIP_V);
386 case V4L2_CID_HFLIP:
387 return ov6650_reg_rmw(client, REG_COMB,
388 ctrl->val ? COMB_FLIP_H : 0, COMB_FLIP_H);
389 }
390
391 return -EINVAL;
392 }
393
394 /* Get chip identification */
395 static int ov6650_g_chip_ident(struct v4l2_subdev *sd,
396 struct v4l2_dbg_chip_ident *id)
397 {
398 id->ident = V4L2_IDENT_OV6650;
399 id->revision = 0;
400
401 return 0;
402 }
403
404 #ifdef CONFIG_VIDEO_ADV_DEBUG
405 static int ov6650_get_register(struct v4l2_subdev *sd,
406 struct v4l2_dbg_register *reg)
407 {
408 struct i2c_client *client = v4l2_get_subdevdata(sd);
409 int ret;
410 u8 val;
411
412 if (reg->reg & ~0xff)
413 return -EINVAL;
414
415 reg->size = 1;
416
417 ret = ov6650_reg_read(client, reg->reg, &val);
418 if (!ret)
419 reg->val = (__u64)val;
420
421 return ret;
422 }
423
424 static int ov6650_set_register(struct v4l2_subdev *sd,
425 struct v4l2_dbg_register *reg)
426 {
427 struct i2c_client *client = v4l2_get_subdevdata(sd);
428
429 if (reg->reg & ~0xff || reg->val & ~0xff)
430 return -EINVAL;
431
432 return ov6650_reg_write(client, reg->reg, reg->val);
433 }
434 #endif
435
436 static int ov6650_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
437 {
438 struct i2c_client *client = v4l2_get_subdevdata(sd);
439 struct ov6650 *priv = to_ov6650(client);
440
441 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
442 a->c = priv->rect;
443
444 return 0;
445 }
446
447 static int ov6650_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
448 {
449 struct i2c_client *client = v4l2_get_subdevdata(sd);
450 struct ov6650 *priv = to_ov6650(client);
451 struct v4l2_rect *rect = &a->c;
452 int ret;
453
454 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
455 return -EINVAL;
456
457 rect->left = ALIGN(rect->left, 2);
458 rect->width = ALIGN(rect->width, 2);
459 rect->top = ALIGN(rect->top, 2);
460 rect->height = ALIGN(rect->height, 2);
461 soc_camera_limit_side(&rect->left, &rect->width,
462 DEF_HSTRT << 1, 2, W_CIF);
463 soc_camera_limit_side(&rect->top, &rect->height,
464 DEF_VSTRT << 1, 2, H_CIF);
465
466 ret = ov6650_reg_write(client, REG_HSTRT, rect->left >> 1);
467 if (!ret) {
468 priv->rect.left = rect->left;
469 ret = ov6650_reg_write(client, REG_HSTOP,
470 (rect->left + rect->width) >> 1);
471 }
472 if (!ret) {
473 priv->rect.width = rect->width;
474 ret = ov6650_reg_write(client, REG_VSTRT, rect->top >> 1);
475 }
476 if (!ret) {
477 priv->rect.top = rect->top;
478 ret = ov6650_reg_write(client, REG_VSTOP,
479 (rect->top + rect->height) >> 1);
480 }
481 if (!ret)
482 priv->rect.height = rect->height;
483
484 return ret;
485 }
486
487 static int ov6650_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
488 {
489 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
490 return -EINVAL;
491
492 a->bounds.left = DEF_HSTRT << 1;
493 a->bounds.top = DEF_VSTRT << 1;
494 a->bounds.width = W_CIF;
495 a->bounds.height = H_CIF;
496 a->defrect = a->bounds;
497 a->pixelaspect.numerator = 1;
498 a->pixelaspect.denominator = 1;
499
500 return 0;
501 }
502
503 static int ov6650_g_fmt(struct v4l2_subdev *sd,
504 struct v4l2_mbus_framefmt *mf)
505 {
506 struct i2c_client *client = v4l2_get_subdevdata(sd);
507 struct ov6650 *priv = to_ov6650(client);
508
509 mf->width = priv->rect.width >> priv->half_scale;
510 mf->height = priv->rect.height >> priv->half_scale;
511 mf->code = priv->code;
512 mf->colorspace = priv->colorspace;
513 mf->field = V4L2_FIELD_NONE;
514
515 return 0;
516 }
517
518 static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect)
519 {
520 return width > rect->width >> 1 || height > rect->height >> 1;
521 }
522
523 static u8 to_clkrc(struct v4l2_fract *timeperframe,
524 unsigned long pclk_limit, unsigned long pclk_max)
525 {
526 unsigned long pclk;
527
528 if (timeperframe->numerator && timeperframe->denominator)
529 pclk = pclk_max * timeperframe->denominator /
530 (FRAME_RATE_MAX * timeperframe->numerator);
531 else
532 pclk = pclk_max;
533
534 if (pclk_limit && pclk_limit < pclk)
535 pclk = pclk_limit;
536
537 return (pclk_max - 1) / pclk;
538 }
539
540 /* set the format we will capture in */
541 static int ov6650_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf)
542 {
543 struct i2c_client *client = v4l2_get_subdevdata(sd);
544 struct soc_camera_device *icd = client->dev.platform_data;
545 struct soc_camera_sense *sense = icd->sense;
546 struct ov6650 *priv = to_ov6650(client);
547 bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect);
548 struct v4l2_crop a = {
549 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
550 .c = {
551 .left = priv->rect.left + (priv->rect.width >> 1) -
552 (mf->width >> (1 - half_scale)),
553 .top = priv->rect.top + (priv->rect.height >> 1) -
554 (mf->height >> (1 - half_scale)),
555 .width = mf->width << half_scale,
556 .height = mf->height << half_scale,
557 },
558 };
559 enum v4l2_mbus_pixelcode code = mf->code;
560 unsigned long mclk, pclk;
561 u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask, clkrc;
562 int ret;
563
564 /* select color matrix configuration for given color encoding */
565 switch (code) {
566 case V4L2_MBUS_FMT_Y8_1X8:
567 dev_dbg(&client->dev, "pixel format GREY8_1X8\n");
568 coma_mask |= COMA_RGB | COMA_WORD_SWAP | COMA_BYTE_SWAP;
569 coma_set |= COMA_BW;
570 break;
571 case V4L2_MBUS_FMT_YUYV8_2X8:
572 dev_dbg(&client->dev, "pixel format YUYV8_2X8_LE\n");
573 coma_mask |= COMA_RGB | COMA_BW | COMA_BYTE_SWAP;
574 coma_set |= COMA_WORD_SWAP;
575 break;
576 case V4L2_MBUS_FMT_YVYU8_2X8:
577 dev_dbg(&client->dev, "pixel format YVYU8_2X8_LE (untested)\n");
578 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP |
579 COMA_BYTE_SWAP;
580 break;
581 case V4L2_MBUS_FMT_UYVY8_2X8:
582 dev_dbg(&client->dev, "pixel format YUYV8_2X8_BE\n");
583 if (half_scale) {
584 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
585 coma_set |= COMA_BYTE_SWAP;
586 } else {
587 coma_mask |= COMA_RGB | COMA_BW;
588 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
589 }
590 break;
591 case V4L2_MBUS_FMT_VYUY8_2X8:
592 dev_dbg(&client->dev, "pixel format YVYU8_2X8_BE (untested)\n");
593 if (half_scale) {
594 coma_mask |= COMA_RGB | COMA_BW;
595 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
596 } else {
597 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
598 coma_set |= COMA_BYTE_SWAP;
599 }
600 break;
601 case V4L2_MBUS_FMT_SBGGR8_1X8:
602 dev_dbg(&client->dev, "pixel format SBGGR8_1X8 (untested)\n");
603 coma_mask |= COMA_BW | COMA_BYTE_SWAP | COMA_WORD_SWAP;
604 coma_set |= COMA_RAW_RGB | COMA_RGB;
605 break;
606 default:
607 dev_err(&client->dev, "Pixel format not handled: 0x%x\n", code);
608 return -EINVAL;
609 }
610 priv->code = code;
611
612 if (code == V4L2_MBUS_FMT_Y8_1X8 ||
613 code == V4L2_MBUS_FMT_SBGGR8_1X8) {
614 coml_mask = COML_ONE_CHANNEL;
615 coml_set = 0;
616 priv->pclk_max = 4000000;
617 } else {
618 coml_mask = 0;
619 coml_set = COML_ONE_CHANNEL;
620 priv->pclk_max = 8000000;
621 }
622
623 if (code == V4L2_MBUS_FMT_SBGGR8_1X8)
624 priv->colorspace = V4L2_COLORSPACE_SRGB;
625 else if (code != 0)
626 priv->colorspace = V4L2_COLORSPACE_JPEG;
627
628 if (half_scale) {
629 dev_dbg(&client->dev, "max resolution: QCIF\n");
630 coma_set |= COMA_QCIF;
631 priv->pclk_max /= 2;
632 } else {
633 dev_dbg(&client->dev, "max resolution: CIF\n");
634 coma_mask |= COMA_QCIF;
635 }
636 priv->half_scale = half_scale;
637
638 if (sense) {
639 if (sense->master_clock == 8000000) {
640 dev_dbg(&client->dev, "8MHz input clock\n");
641 clkrc = CLKRC_6MHz;
642 } else if (sense->master_clock == 12000000) {
643 dev_dbg(&client->dev, "12MHz input clock\n");
644 clkrc = CLKRC_12MHz;
645 } else if (sense->master_clock == 16000000) {
646 dev_dbg(&client->dev, "16MHz input clock\n");
647 clkrc = CLKRC_16MHz;
648 } else if (sense->master_clock == 24000000) {
649 dev_dbg(&client->dev, "24MHz input clock\n");
650 clkrc = CLKRC_24MHz;
651 } else {
652 dev_err(&client->dev,
653 "unspported input clock, check platform data\n");
654 return -EINVAL;
655 }
656 mclk = sense->master_clock;
657 priv->pclk_limit = sense->pixel_clock_max;
658 } else {
659 clkrc = CLKRC_24MHz;
660 mclk = 24000000;
661 priv->pclk_limit = 0;
662 dev_dbg(&client->dev, "using default 24MHz input clock\n");
663 }
664
665 clkrc |= to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
666
667 pclk = priv->pclk_max / GET_CLKRC_DIV(clkrc);
668 dev_dbg(&client->dev, "pixel clock divider: %ld.%ld\n",
669 mclk / pclk, 10 * mclk % pclk / pclk);
670
671 ret = ov6650_s_crop(sd, &a);
672 if (!ret)
673 ret = ov6650_reg_rmw(client, REG_COMA, coma_set, coma_mask);
674 if (!ret)
675 ret = ov6650_reg_write(client, REG_CLKRC, clkrc);
676 if (!ret)
677 ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask);
678
679 if (!ret) {
680 mf->colorspace = priv->colorspace;
681 mf->width = priv->rect.width >> half_scale;
682 mf->height = priv->rect.height >> half_scale;
683 }
684
685 return ret;
686 }
687
688 static int ov6650_try_fmt(struct v4l2_subdev *sd,
689 struct v4l2_mbus_framefmt *mf)
690 {
691 struct i2c_client *client = v4l2_get_subdevdata(sd);
692 struct ov6650 *priv = to_ov6650(client);
693
694 if (is_unscaled_ok(mf->width, mf->height, &priv->rect))
695 v4l_bound_align_image(&mf->width, 2, W_CIF, 1,
696 &mf->height, 2, H_CIF, 1, 0);
697
698 mf->field = V4L2_FIELD_NONE;
699
700 switch (mf->code) {
701 case V4L2_MBUS_FMT_Y10_1X10:
702 mf->code = V4L2_MBUS_FMT_Y8_1X8;
703 case V4L2_MBUS_FMT_Y8_1X8:
704 case V4L2_MBUS_FMT_YVYU8_2X8:
705 case V4L2_MBUS_FMT_YUYV8_2X8:
706 case V4L2_MBUS_FMT_VYUY8_2X8:
707 case V4L2_MBUS_FMT_UYVY8_2X8:
708 mf->colorspace = V4L2_COLORSPACE_JPEG;
709 break;
710 default:
711 mf->code = V4L2_MBUS_FMT_SBGGR8_1X8;
712 case V4L2_MBUS_FMT_SBGGR8_1X8:
713 mf->colorspace = V4L2_COLORSPACE_SRGB;
714 break;
715 }
716
717 return 0;
718 }
719
720 static int ov6650_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
721 enum v4l2_mbus_pixelcode *code)
722 {
723 if (index >= ARRAY_SIZE(ov6650_codes))
724 return -EINVAL;
725
726 *code = ov6650_codes[index];
727 return 0;
728 }
729
730 static int ov6650_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
731 {
732 struct i2c_client *client = v4l2_get_subdevdata(sd);
733 struct ov6650 *priv = to_ov6650(client);
734 struct v4l2_captureparm *cp = &parms->parm.capture;
735
736 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
737 return -EINVAL;
738
739 memset(cp, 0, sizeof(*cp));
740 cp->capability = V4L2_CAP_TIMEPERFRAME;
741 cp->timeperframe.numerator = GET_CLKRC_DIV(to_clkrc(&priv->tpf,
742 priv->pclk_limit, priv->pclk_max));
743 cp->timeperframe.denominator = FRAME_RATE_MAX;
744
745 dev_dbg(&client->dev, "Frame interval: %u/%u s\n",
746 cp->timeperframe.numerator, cp->timeperframe.denominator);
747
748 return 0;
749 }
750
751 static int ov6650_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
752 {
753 struct i2c_client *client = v4l2_get_subdevdata(sd);
754 struct ov6650 *priv = to_ov6650(client);
755 struct v4l2_captureparm *cp = &parms->parm.capture;
756 struct v4l2_fract *tpf = &cp->timeperframe;
757 int div, ret;
758 u8 clkrc;
759
760 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
761 return -EINVAL;
762
763 if (cp->extendedmode != 0)
764 return -EINVAL;
765
766 if (tpf->numerator == 0 || tpf->denominator == 0)
767 div = 1; /* Reset to full rate */
768 else
769 div = (tpf->numerator * FRAME_RATE_MAX) / tpf->denominator;
770
771 if (div == 0)
772 div = 1;
773 else if (div > GET_CLKRC_DIV(CLKRC_DIV_MASK))
774 div = GET_CLKRC_DIV(CLKRC_DIV_MASK);
775
776 /*
777 * Keep result to be used as tpf limit
778 * for subseqent clock divider calculations
779 */
780 priv->tpf.numerator = div;
781 priv->tpf.denominator = FRAME_RATE_MAX;
782
783 clkrc = to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
784
785 ret = ov6650_reg_rmw(client, REG_CLKRC, clkrc, CLKRC_DIV_MASK);
786 if (!ret) {
787 tpf->numerator = GET_CLKRC_DIV(clkrc);
788 tpf->denominator = FRAME_RATE_MAX;
789 }
790
791 return ret;
792 }
793
794 /* Soft reset the camera. This has nothing to do with the RESET pin! */
795 static int ov6650_reset(struct i2c_client *client)
796 {
797 int ret;
798
799 dev_dbg(&client->dev, "reset\n");
800
801 ret = ov6650_reg_rmw(client, REG_COMA, COMA_RESET, 0);
802 if (ret)
803 dev_err(&client->dev,
804 "An error occurred while entering soft reset!\n");
805
806 return ret;
807 }
808
809 /* program default register values */
810 static int ov6650_prog_dflt(struct i2c_client *client)
811 {
812 int ret;
813
814 dev_dbg(&client->dev, "initializing\n");
815
816 ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */
817 if (!ret)
818 ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_BAND_FILTER);
819
820 return ret;
821 }
822
823 static int ov6650_video_probe(struct soc_camera_device *icd,
824 struct i2c_client *client)
825 {
826 u8 pidh, pidl, midh, midl;
827 int ret = 0;
828
829 /*
830 * check and show product ID and manufacturer ID
831 */
832 ret = ov6650_reg_read(client, REG_PIDH, &pidh);
833 if (!ret)
834 ret = ov6650_reg_read(client, REG_PIDL, &pidl);
835 if (!ret)
836 ret = ov6650_reg_read(client, REG_MIDH, &midh);
837 if (!ret)
838 ret = ov6650_reg_read(client, REG_MIDL, &midl);
839
840 if (ret)
841 return ret;
842
843 if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) {
844 dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n",
845 pidh, pidl);
846 return -ENODEV;
847 }
848
849 dev_info(&client->dev,
850 "ov6650 Product ID 0x%02x:0x%02x Manufacturer ID 0x%02x:0x%02x\n",
851 pidh, pidl, midh, midl);
852
853 ret = ov6650_reset(client);
854 if (!ret)
855 ret = ov6650_prog_dflt(client);
856
857 return ret;
858 }
859
860 static const struct v4l2_ctrl_ops ov6550_ctrl_ops = {
861 .g_volatile_ctrl = ov6550_g_volatile_ctrl,
862 .s_ctrl = ov6550_s_ctrl,
863 };
864
865 static struct v4l2_subdev_core_ops ov6650_core_ops = {
866 .g_chip_ident = ov6650_g_chip_ident,
867 #ifdef CONFIG_VIDEO_ADV_DEBUG
868 .g_register = ov6650_get_register,
869 .s_register = ov6650_set_register,
870 #endif
871 };
872
873 /* Request bus settings on camera side */
874 static int ov6650_g_mbus_config(struct v4l2_subdev *sd,
875 struct v4l2_mbus_config *cfg)
876 {
877 struct i2c_client *client = v4l2_get_subdevdata(sd);
878 struct soc_camera_device *icd = client->dev.platform_data;
879 struct soc_camera_link *icl = to_soc_camera_link(icd);
880
881 cfg->flags = V4L2_MBUS_MASTER |
882 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
883 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
884 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
885 V4L2_MBUS_DATA_ACTIVE_HIGH;
886 cfg->type = V4L2_MBUS_PARALLEL;
887 cfg->flags = soc_camera_apply_board_flags(icl, cfg);
888
889 return 0;
890 }
891
892 /* Alter bus settings on camera side */
893 static int ov6650_s_mbus_config(struct v4l2_subdev *sd,
894 const struct v4l2_mbus_config *cfg)
895 {
896 struct i2c_client *client = v4l2_get_subdevdata(sd);
897 struct soc_camera_device *icd = client->dev.platform_data;
898 struct soc_camera_link *icl = to_soc_camera_link(icd);
899 unsigned long flags = soc_camera_apply_board_flags(icl, cfg);
900 int ret;
901
902 if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
903 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_PCLK_RISING, 0);
904 else
905 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_PCLK_RISING);
906 if (ret)
907 return ret;
908
909 if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
910 ret = ov6650_reg_rmw(client, REG_COMF, COMF_HREF_LOW, 0);
911 else
912 ret = ov6650_reg_rmw(client, REG_COMF, 0, COMF_HREF_LOW);
913 if (ret)
914 return ret;
915
916 if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
917 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_VSYNC_HIGH, 0);
918 else
919 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_VSYNC_HIGH);
920
921 return ret;
922 }
923
924 static struct v4l2_subdev_video_ops ov6650_video_ops = {
925 .s_stream = ov6650_s_stream,
926 .g_mbus_fmt = ov6650_g_fmt,
927 .s_mbus_fmt = ov6650_s_fmt,
928 .try_mbus_fmt = ov6650_try_fmt,
929 .enum_mbus_fmt = ov6650_enum_fmt,
930 .cropcap = ov6650_cropcap,
931 .g_crop = ov6650_g_crop,
932 .s_crop = ov6650_s_crop,
933 .g_parm = ov6650_g_parm,
934 .s_parm = ov6650_s_parm,
935 .g_mbus_config = ov6650_g_mbus_config,
936 .s_mbus_config = ov6650_s_mbus_config,
937 };
938
939 static struct v4l2_subdev_ops ov6650_subdev_ops = {
940 .core = &ov6650_core_ops,
941 .video = &ov6650_video_ops,
942 };
943
944 /*
945 * i2c_driver function
946 */
947 static int ov6650_probe(struct i2c_client *client,
948 const struct i2c_device_id *did)
949 {
950 struct ov6650 *priv;
951 struct soc_camera_device *icd = client->dev.platform_data;
952 struct soc_camera_link *icl;
953 int ret;
954
955 if (!icd) {
956 dev_err(&client->dev, "Missing soc-camera data!\n");
957 return -EINVAL;
958 }
959
960 icl = to_soc_camera_link(icd);
961 if (!icl) {
962 dev_err(&client->dev, "Missing platform_data for driver\n");
963 return -EINVAL;
964 }
965
966 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
967 if (!priv) {
968 dev_err(&client->dev,
969 "Failed to allocate memory for private data!\n");
970 return -ENOMEM;
971 }
972
973 v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops);
974 v4l2_ctrl_handler_init(&priv->hdl, 13);
975 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
976 V4L2_CID_VFLIP, 0, 1, 1, 0);
977 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
978 V4L2_CID_HFLIP, 0, 1, 1, 0);
979 priv->autogain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
980 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
981 priv->gain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
982 V4L2_CID_GAIN, 0, 0x3f, 1, DEF_GAIN);
983 priv->autowb = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
984 V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
985 priv->blue = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
986 V4L2_CID_BLUE_BALANCE, 0, 0xff, 1, DEF_BLUE);
987 priv->red = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
988 V4L2_CID_RED_BALANCE, 0, 0xff, 1, DEF_RED);
989 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
990 V4L2_CID_SATURATION, 0, 0xf, 1, 0x8);
991 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
992 V4L2_CID_HUE, 0, HUE_MASK, 1, DEF_HUE);
993 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
994 V4L2_CID_BRIGHTNESS, 0, 0xff, 1, 0x80);
995 priv->autoexposure = v4l2_ctrl_new_std_menu(&priv->hdl,
996 &ov6550_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
997 V4L2_EXPOSURE_AUTO);
998 priv->exposure = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
999 V4L2_CID_EXPOSURE, 0, 0xff, 1, DEF_AECH);
1000 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1001 V4L2_CID_GAMMA, 0, 0xff, 1, 0x12);
1002
1003 priv->subdev.ctrl_handler = &priv->hdl;
1004 if (priv->hdl.error) {
1005 int err = priv->hdl.error;
1006
1007 kfree(priv);
1008 return err;
1009 }
1010 v4l2_ctrl_auto_cluster(2, &priv->autogain, 0, true);
1011 v4l2_ctrl_auto_cluster(3, &priv->autowb, 0, true);
1012 v4l2_ctrl_auto_cluster(2, &priv->autoexposure,
1013 V4L2_EXPOSURE_MANUAL, true);
1014
1015 priv->rect.left = DEF_HSTRT << 1;
1016 priv->rect.top = DEF_VSTRT << 1;
1017 priv->rect.width = W_CIF;
1018 priv->rect.height = H_CIF;
1019 priv->half_scale = false;
1020 priv->code = V4L2_MBUS_FMT_YUYV8_2X8;
1021 priv->colorspace = V4L2_COLORSPACE_JPEG;
1022
1023 ret = ov6650_video_probe(icd, client);
1024 if (!ret)
1025 ret = v4l2_ctrl_handler_setup(&priv->hdl);
1026
1027 if (ret) {
1028 v4l2_ctrl_handler_free(&priv->hdl);
1029 kfree(priv);
1030 }
1031
1032 return ret;
1033 }
1034
1035 static int ov6650_remove(struct i2c_client *client)
1036 {
1037 struct ov6650 *priv = to_ov6650(client);
1038
1039 v4l2_device_unregister_subdev(&priv->subdev);
1040 v4l2_ctrl_handler_free(&priv->hdl);
1041 kfree(priv);
1042 return 0;
1043 }
1044
1045 static const struct i2c_device_id ov6650_id[] = {
1046 { "ov6650", 0 },
1047 { }
1048 };
1049 MODULE_DEVICE_TABLE(i2c, ov6650_id);
1050
1051 static struct i2c_driver ov6650_i2c_driver = {
1052 .driver = {
1053 .name = "ov6650",
1054 },
1055 .probe = ov6650_probe,
1056 .remove = ov6650_remove,
1057 .id_table = ov6650_id,
1058 };
1059
1060 static int __init ov6650_module_init(void)
1061 {
1062 return i2c_add_driver(&ov6650_i2c_driver);
1063 }
1064
1065 static void __exit ov6650_module_exit(void)
1066 {
1067 i2c_del_driver(&ov6650_i2c_driver);
1068 }
1069
1070 module_init(ov6650_module_init);
1071 module_exit(ov6650_module_exit);
1072
1073 MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV6650");
1074 MODULE_AUTHOR("Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>");
1075 MODULE_LICENSE("GPL v2");
Linux 2.6 libata-dev (mirror)