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 #include <linux/v4l2-mediabus.h>
32 #include <linux/module.h>
33
34 #include <media/soc_camera.h>
35 #include <media/v4l2-chip-ident.h>
36 #include <media/v4l2-ctrls.h>
37
38 /* Register definitions */
39 #define REG_GAIN 0x00 /* range 00 - 3F */
40 #define REG_BLUE 0x01
41 #define REG_RED 0x02
42 #define REG_SAT 0x03 /* [7:4] saturation [0:3] reserved */
43 #define REG_HUE 0x04 /* [7:6] rsrvd [5] hue en [4:0] hue */
44
45 #define REG_BRT 0x06
46
47 #define REG_PIDH 0x0a
48 #define REG_PIDL 0x0b
49
50 #define REG_AECH 0x10
51 #define REG_CLKRC 0x11 /* Data Format and Internal Clock */
52 /* [7:6] Input system clock (MHz)*/
53 /* 00=8, 01=12, 10=16, 11=24 */
54 /* [5:0]: Internal Clock Pre-Scaler */
55 #define REG_COMA 0x12 /* [7] Reset */
56 #define REG_COMB 0x13
57 #define REG_COMC 0x14
58 #define REG_COMD 0x15
59 #define REG_COML 0x16
60 #define REG_HSTRT 0x17
61 #define REG_HSTOP 0x18
62 #define REG_VSTRT 0x19
63 #define REG_VSTOP 0x1a
64 #define REG_PSHFT 0x1b
65 #define REG_MIDH 0x1c
66 #define REG_MIDL 0x1d
67 #define REG_HSYNS 0x1e
68 #define REG_HSYNE 0x1f
69 #define REG_COME 0x20
70 #define REG_YOFF 0x21
71 #define REG_UOFF 0x22
72 #define REG_VOFF 0x23
73 #define REG_AEW 0x24
74 #define REG_AEB 0x25
75 #define REG_COMF 0x26
76 #define REG_COMG 0x27
77 #define REG_COMH 0x28
78 #define REG_COMI 0x29
79
80 #define REG_FRARL 0x2b
81 #define REG_COMJ 0x2c
82 #define REG_COMK 0x2d
83 #define REG_AVGY 0x2e
84 #define REG_REF0 0x2f
85 #define REG_REF1 0x30
86 #define REG_REF2 0x31
87 #define REG_FRAJH 0x32
88 #define REG_FRAJL 0x33
89 #define REG_FACT 0x34
90 #define REG_L1AEC 0x35
91 #define REG_AVGU 0x36
92 #define REG_AVGV 0x37
93
94 #define REG_SPCB 0x60
95 #define REG_SPCC 0x61
96 #define REG_GAM1 0x62
97 #define REG_GAM2 0x63
98 #define REG_GAM3 0x64
99 #define REG_SPCD 0x65
100
101 #define REG_SPCE 0x68
102 #define REG_ADCL 0x69
103
104 #define REG_RMCO 0x6c
105 #define REG_GMCO 0x6d
106 #define REG_BMCO 0x6e
107
108
109 /* Register bits, values, etc. */
110 #define OV6650_PIDH 0x66 /* high byte of product ID number */
111 #define OV6650_PIDL 0x50 /* low byte of product ID number */
112 #define OV6650_MIDH 0x7F /* high byte of mfg ID */
113 #define OV6650_MIDL 0xA2 /* low byte of mfg ID */
114
115 #define DEF_GAIN 0x00
116 #define DEF_BLUE 0x80
117 #define DEF_RED 0x80
118
119 #define SAT_SHIFT 4
120 #define SAT_MASK (0xf << SAT_SHIFT)
121 #define SET_SAT(x) (((x) << SAT_SHIFT) & SAT_MASK)
122
123 #define HUE_EN BIT(5)
124 #define HUE_MASK 0x1f
125 #define DEF_HUE 0x10
126 #define SET_HUE(x) (HUE_EN | ((x) & HUE_MASK))
127
128 #define DEF_AECH 0x4D
129
130 #define CLKRC_6MHz 0x00
131 #define CLKRC_12MHz 0x40
132 #define CLKRC_16MHz 0x80
133 #define CLKRC_24MHz 0xc0
134 #define CLKRC_DIV_MASK 0x3f
135 #define GET_CLKRC_DIV(x) (((x) & CLKRC_DIV_MASK) + 1)
136
137 #define COMA_RESET BIT(7)
138 #define COMA_QCIF BIT(5)
139 #define COMA_RAW_RGB BIT(4)
140 #define COMA_RGB BIT(3)
141 #define COMA_BW BIT(2)
142 #define COMA_WORD_SWAP BIT(1)
143 #define COMA_BYTE_SWAP BIT(0)
144 #define DEF_COMA 0x00
145
146 #define COMB_FLIP_V BIT(7)
147 #define COMB_FLIP_H BIT(5)
148 #define COMB_BAND_FILTER BIT(4)
149 #define COMB_AWB BIT(2)
150 #define COMB_AGC BIT(1)
151 #define COMB_AEC BIT(0)
152 #define DEF_COMB 0x5f
153
154 #define COML_ONE_CHANNEL BIT(7)
155
156 #define DEF_HSTRT 0x24
157 #define DEF_HSTOP 0xd4
158 #define DEF_VSTRT 0x04
159 #define DEF_VSTOP 0x94
160
161 #define COMF_HREF_LOW BIT(4)
162
163 #define COMJ_PCLK_RISING BIT(4)
164 #define COMJ_VSYNC_HIGH BIT(0)
165
166 /* supported resolutions */
167 #define W_QCIF (DEF_HSTOP - DEF_HSTRT)
168 #define W_CIF (W_QCIF << 1)
169 #define H_QCIF (DEF_VSTOP - DEF_VSTRT)
170 #define H_CIF (H_QCIF << 1)
171
172 #define FRAME_RATE_MAX 30
173
174
175 struct ov6650_reg {
176 u8 reg;
177 u8 val;
178 };
179
180 struct ov6650 {
181 struct v4l2_subdev subdev;
182 struct v4l2_ctrl_handler hdl;
183 struct {
184 /* exposure/autoexposure cluster */
185 struct v4l2_ctrl *autoexposure;
186 struct v4l2_ctrl *exposure;
187 };
188 struct {
189 /* gain/autogain cluster */
190 struct v4l2_ctrl *autogain;
191 struct v4l2_ctrl *gain;
192 };
193 struct {
194 /* blue/red/autowhitebalance cluster */
195 struct v4l2_ctrl *autowb;
196 struct v4l2_ctrl *blue;
197 struct v4l2_ctrl *red;
198 };
199 bool half_scale; /* scale down output by 2 */
200 struct v4l2_rect rect; /* sensor cropping window */
201 unsigned long pclk_limit; /* from host */
202 unsigned long pclk_max; /* from resolution and format */
203 struct v4l2_fract tpf; /* as requested with s_parm */
204 enum v4l2_mbus_pixelcode code;
205 enum v4l2_colorspace colorspace;
206 };
207
208
209 static enum v4l2_mbus_pixelcode ov6650_codes[] = {
210 V4L2_MBUS_FMT_YUYV8_2X8,
211 V4L2_MBUS_FMT_UYVY8_2X8,
212 V4L2_MBUS_FMT_YVYU8_2X8,
213 V4L2_MBUS_FMT_VYUY8_2X8,
214 V4L2_MBUS_FMT_SBGGR8_1X8,
215 V4L2_MBUS_FMT_Y8_1X8,
216 };
217
218 /* read a register */
ov6650_reg_read(struct i2c_client * client,u8 reg,u8 * val)219 static int ov6650_reg_read(struct i2c_client *client, u8 reg, u8 *val)
220 {
221 int ret;
222 u8 data = reg;
223 struct i2c_msg msg = {
224 .addr = client->addr,
225 .flags = 0,
226 .len = 1,
227 .buf = &data,
228 };
229
230 ret = i2c_transfer(client->adapter, &msg, 1);
231 if (ret < 0)
232 goto err;
233
234 msg.flags = I2C_M_RD;
235 ret = i2c_transfer(client->adapter, &msg, 1);
236 if (ret < 0)
237 goto err;
238
239 *val = data;
240 return 0;
241
242 err:
243 dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
244 return ret;
245 }
246
247 /* write a register */
ov6650_reg_write(struct i2c_client * client,u8 reg,u8 val)248 static int ov6650_reg_write(struct i2c_client *client, u8 reg, u8 val)
249 {
250 int ret;
251 unsigned char data[2] = { reg, val };
252 struct i2c_msg msg = {
253 .addr = client->addr,
254 .flags = 0,
255 .len = 2,
256 .buf = data,
257 };
258
259 ret = i2c_transfer(client->adapter, &msg, 1);
260 udelay(100);
261
262 if (ret < 0) {
263 dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
264 return ret;
265 }
266 return 0;
267 }
268
269
270 /* Read a register, alter its bits, write it back */
ov6650_reg_rmw(struct i2c_client * client,u8 reg,u8 set,u8 mask)271 static int ov6650_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 mask)
272 {
273 u8 val;
274 int ret;
275
276 ret = ov6650_reg_read(client, reg, &val);
277 if (ret) {
278 dev_err(&client->dev,
279 "[Read]-Modify-Write of register 0x%02x failed!\n",
280 reg);
281 return ret;
282 }
283
284 val &= ~mask;
285 val |= set;
286
287 ret = ov6650_reg_write(client, reg, val);
288 if (ret)
289 dev_err(&client->dev,
290 "Read-Modify-[Write] of register 0x%02x failed!\n",
291 reg);
292
293 return ret;
294 }
295
to_ov6650(const struct i2c_client * client)296 static struct ov6650 *to_ov6650(const struct i2c_client *client)
297 {
298 return container_of(i2c_get_clientdata(client), struct ov6650, subdev);
299 }
300
301 /* Start/Stop streaming from the device */
ov6650_s_stream(struct v4l2_subdev * sd,int enable)302 static int ov6650_s_stream(struct v4l2_subdev *sd, int enable)
303 {
304 return 0;
305 }
306
307 /* Get status of additional camera capabilities */
ov6550_g_volatile_ctrl(struct v4l2_ctrl * ctrl)308 static int ov6550_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
309 {
310 struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl);
311 struct v4l2_subdev *sd = &priv->subdev;
312 struct i2c_client *client = v4l2_get_subdevdata(sd);
313 uint8_t reg, reg2;
314 int ret;
315
316 switch (ctrl->id) {
317 case V4L2_CID_AUTOGAIN:
318 ret = ov6650_reg_read(client, REG_GAIN, ®);
319 if (!ret)
320 priv->gain->val = reg;
321 return ret;
322 case V4L2_CID_AUTO_WHITE_BALANCE:
323 ret = ov6650_reg_read(client, REG_BLUE, ®);
324 if (!ret)
325 ret = ov6650_reg_read(client, REG_RED, ®2);
326 if (!ret) {
327 priv->blue->val = reg;
328 priv->red->val = reg2;
329 }
330 return ret;
331 case V4L2_CID_EXPOSURE_AUTO:
332 ret = ov6650_reg_read(client, REG_AECH, ®);
333 if (!ret)
334 priv->exposure->val = reg;
335 return ret;
336 }
337 return -EINVAL;
338 }
339
340 /* Set status of additional camera capabilities */
ov6550_s_ctrl(struct v4l2_ctrl * ctrl)341 static int ov6550_s_ctrl(struct v4l2_ctrl *ctrl)
342 {
343 struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl);
344 struct v4l2_subdev *sd = &priv->subdev;
345 struct i2c_client *client = v4l2_get_subdevdata(sd);
346 int ret;
347
348 switch (ctrl->id) {
349 case V4L2_CID_AUTOGAIN:
350 ret = ov6650_reg_rmw(client, REG_COMB,
351 ctrl->val ? COMB_AGC : 0, COMB_AGC);
352 if (!ret && !ctrl->val)
353 ret = ov6650_reg_write(client, REG_GAIN, priv->gain->val);
354 return ret;
355 case V4L2_CID_AUTO_WHITE_BALANCE:
356 ret = ov6650_reg_rmw(client, REG_COMB,
357 ctrl->val ? COMB_AWB : 0, COMB_AWB);
358 if (!ret && !ctrl->val) {
359 ret = ov6650_reg_write(client, REG_BLUE, priv->blue->val);
360 if (!ret)
361 ret = ov6650_reg_write(client, REG_RED,
362 priv->red->val);
363 }
364 return ret;
365 case V4L2_CID_SATURATION:
366 return ov6650_reg_rmw(client, REG_SAT, SET_SAT(ctrl->val),
367 SAT_MASK);
368 case V4L2_CID_HUE:
369 return ov6650_reg_rmw(client, REG_HUE, SET_HUE(ctrl->val),
370 HUE_MASK);
371 case V4L2_CID_BRIGHTNESS:
372 return ov6650_reg_write(client, REG_BRT, ctrl->val);
373 case V4L2_CID_EXPOSURE_AUTO:
374 ret = ov6650_reg_rmw(client, REG_COMB, ctrl->val ==
375 V4L2_EXPOSURE_AUTO ? COMB_AEC : 0, COMB_AEC);
376 if (!ret && ctrl->val == V4L2_EXPOSURE_MANUAL)
377 ret = ov6650_reg_write(client, REG_AECH,
378 priv->exposure->val);
379 return ret;
380 case V4L2_CID_GAMMA:
381 return ov6650_reg_write(client, REG_GAM1, ctrl->val);
382 case V4L2_CID_VFLIP:
383 return ov6650_reg_rmw(client, REG_COMB,
384 ctrl->val ? COMB_FLIP_V : 0, COMB_FLIP_V);
385 case V4L2_CID_HFLIP:
386 return ov6650_reg_rmw(client, REG_COMB,
387 ctrl->val ? COMB_FLIP_H : 0, COMB_FLIP_H);
388 }
389
390 return -EINVAL;
391 }
392
393 /* Get chip identification */
ov6650_g_chip_ident(struct v4l2_subdev * sd,struct v4l2_dbg_chip_ident * id)394 static int ov6650_g_chip_ident(struct v4l2_subdev *sd,
395 struct v4l2_dbg_chip_ident *id)
396 {
397 id->ident = V4L2_IDENT_OV6650;
398 id->revision = 0;
399
400 return 0;
401 }
402
403 #ifdef CONFIG_VIDEO_ADV_DEBUG
ov6650_get_register(struct v4l2_subdev * sd,struct v4l2_dbg_register * reg)404 static int ov6650_get_register(struct v4l2_subdev *sd,
405 struct v4l2_dbg_register *reg)
406 {
407 struct i2c_client *client = v4l2_get_subdevdata(sd);
408 int ret;
409 u8 val;
410
411 if (reg->reg & ~0xff)
412 return -EINVAL;
413
414 reg->size = 1;
415
416 ret = ov6650_reg_read(client, reg->reg, &val);
417 if (!ret)
418 reg->val = (__u64)val;
419
420 return ret;
421 }
422
ov6650_set_register(struct v4l2_subdev * sd,struct v4l2_dbg_register * reg)423 static int ov6650_set_register(struct v4l2_subdev *sd,
424 struct v4l2_dbg_register *reg)
425 {
426 struct i2c_client *client = v4l2_get_subdevdata(sd);
427
428 if (reg->reg & ~0xff || reg->val & ~0xff)
429 return -EINVAL;
430
431 return ov6650_reg_write(client, reg->reg, reg->val);
432 }
433 #endif
434
ov6650_g_crop(struct v4l2_subdev * sd,struct v4l2_crop * a)435 static int ov6650_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
436 {
437 struct i2c_client *client = v4l2_get_subdevdata(sd);
438 struct ov6650 *priv = to_ov6650(client);
439
440 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
441 a->c = priv->rect;
442
443 return 0;
444 }
445
ov6650_s_crop(struct v4l2_subdev * sd,struct v4l2_crop * a)446 static int ov6650_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
447 {
448 struct i2c_client *client = v4l2_get_subdevdata(sd);
449 struct ov6650 *priv = to_ov6650(client);
450 struct v4l2_rect *rect = &a->c;
451 int ret;
452
453 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
454 return -EINVAL;
455
456 rect->left = ALIGN(rect->left, 2);
457 rect->width = ALIGN(rect->width, 2);
458 rect->top = ALIGN(rect->top, 2);
459 rect->height = ALIGN(rect->height, 2);
460 soc_camera_limit_side(&rect->left, &rect->width,
461 DEF_HSTRT << 1, 2, W_CIF);
462 soc_camera_limit_side(&rect->top, &rect->height,
463 DEF_VSTRT << 1, 2, H_CIF);
464
465 ret = ov6650_reg_write(client, REG_HSTRT, rect->left >> 1);
466 if (!ret) {
467 priv->rect.left = rect->left;
468 ret = ov6650_reg_write(client, REG_HSTOP,
469 (rect->left + rect->width) >> 1);
470 }
471 if (!ret) {
472 priv->rect.width = rect->width;
473 ret = ov6650_reg_write(client, REG_VSTRT, rect->top >> 1);
474 }
475 if (!ret) {
476 priv->rect.top = rect->top;
477 ret = ov6650_reg_write(client, REG_VSTOP,
478 (rect->top + rect->height) >> 1);
479 }
480 if (!ret)
481 priv->rect.height = rect->height;
482
483 return ret;
484 }
485
ov6650_cropcap(struct v4l2_subdev * sd,struct v4l2_cropcap * a)486 static int ov6650_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
487 {
488 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
489 return -EINVAL;
490
491 a->bounds.left = DEF_HSTRT << 1;
492 a->bounds.top = DEF_VSTRT << 1;
493 a->bounds.width = W_CIF;
494 a->bounds.height = H_CIF;
495 a->defrect = a->bounds;
496 a->pixelaspect.numerator = 1;
497 a->pixelaspect.denominator = 1;
498
499 return 0;
500 }
501
ov6650_g_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * mf)502 static int ov6650_g_fmt(struct v4l2_subdev *sd,
503 struct v4l2_mbus_framefmt *mf)
504 {
505 struct i2c_client *client = v4l2_get_subdevdata(sd);
506 struct ov6650 *priv = to_ov6650(client);
507
508 mf->width = priv->rect.width >> priv->half_scale;
509 mf->height = priv->rect.height >> priv->half_scale;
510 mf->code = priv->code;
511 mf->colorspace = priv->colorspace;
512 mf->field = V4L2_FIELD_NONE;
513
514 return 0;
515 }
516
is_unscaled_ok(int width,int height,struct v4l2_rect * rect)517 static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect)
518 {
519 return width > rect->width >> 1 || height > rect->height >> 1;
520 }
521
to_clkrc(struct v4l2_fract * timeperframe,unsigned long pclk_limit,unsigned long pclk_max)522 static u8 to_clkrc(struct v4l2_fract *timeperframe,
523 unsigned long pclk_limit, unsigned long pclk_max)
524 {
525 unsigned long pclk;
526
527 if (timeperframe->numerator && timeperframe->denominator)
528 pclk = pclk_max * timeperframe->denominator /
529 (FRAME_RATE_MAX * timeperframe->numerator);
530 else
531 pclk = pclk_max;
532
533 if (pclk_limit && pclk_limit < pclk)
534 pclk = pclk_limit;
535
536 return (pclk_max - 1) / pclk;
537 }
538
539 /* set the format we will capture in */
ov6650_s_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * mf)540 static int ov6650_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf)
541 {
542 struct i2c_client *client = v4l2_get_subdevdata(sd);
543 struct soc_camera_device *icd = v4l2_get_subdev_hostdata(sd);
544 struct soc_camera_sense *sense = icd->sense;
545 struct ov6650 *priv = to_ov6650(client);
546 bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect);
547 struct v4l2_crop a = {
548 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
549 .c = {
550 .left = priv->rect.left + (priv->rect.width >> 1) -
551 (mf->width >> (1 - half_scale)),
552 .top = priv->rect.top + (priv->rect.height >> 1) -
553 (mf->height >> (1 - half_scale)),
554 .width = mf->width << half_scale,
555 .height = mf->height << half_scale,
556 },
557 };
558 enum v4l2_mbus_pixelcode code = mf->code;
559 unsigned long mclk, pclk;
560 u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask, clkrc;
561 int ret;
562
563 /* select color matrix configuration for given color encoding */
564 switch (code) {
565 case V4L2_MBUS_FMT_Y8_1X8:
566 dev_dbg(&client->dev, "pixel format GREY8_1X8\n");
567 coma_mask |= COMA_RGB | COMA_WORD_SWAP | COMA_BYTE_SWAP;
568 coma_set |= COMA_BW;
569 break;
570 case V4L2_MBUS_FMT_YUYV8_2X8:
571 dev_dbg(&client->dev, "pixel format YUYV8_2X8_LE\n");
572 coma_mask |= COMA_RGB | COMA_BW | COMA_BYTE_SWAP;
573 coma_set |= COMA_WORD_SWAP;
574 break;
575 case V4L2_MBUS_FMT_YVYU8_2X8:
576 dev_dbg(&client->dev, "pixel format YVYU8_2X8_LE (untested)\n");
577 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP |
578 COMA_BYTE_SWAP;
579 break;
580 case V4L2_MBUS_FMT_UYVY8_2X8:
581 dev_dbg(&client->dev, "pixel format YUYV8_2X8_BE\n");
582 if (half_scale) {
583 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
584 coma_set |= COMA_BYTE_SWAP;
585 } else {
586 coma_mask |= COMA_RGB | COMA_BW;
587 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
588 }
589 break;
590 case V4L2_MBUS_FMT_VYUY8_2X8:
591 dev_dbg(&client->dev, "pixel format YVYU8_2X8_BE (untested)\n");
592 if (half_scale) {
593 coma_mask |= COMA_RGB | COMA_BW;
594 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
595 } else {
596 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
597 coma_set |= COMA_BYTE_SWAP;
598 }
599 break;
600 case V4L2_MBUS_FMT_SBGGR8_1X8:
601 dev_dbg(&client->dev, "pixel format SBGGR8_1X8 (untested)\n");
602 coma_mask |= COMA_BW | COMA_BYTE_SWAP | COMA_WORD_SWAP;
603 coma_set |= COMA_RAW_RGB | COMA_RGB;
604 break;
605 default:
606 dev_err(&client->dev, "Pixel format not handled: 0x%x\n", code);
607 return -EINVAL;
608 }
609 priv->code = code;
610
611 if (code == V4L2_MBUS_FMT_Y8_1X8 ||
612 code == V4L2_MBUS_FMT_SBGGR8_1X8) {
613 coml_mask = COML_ONE_CHANNEL;
614 coml_set = 0;
615 priv->pclk_max = 4000000;
616 } else {
617 coml_mask = 0;
618 coml_set = COML_ONE_CHANNEL;
619 priv->pclk_max = 8000000;
620 }
621
622 if (code == V4L2_MBUS_FMT_SBGGR8_1X8)
623 priv->colorspace = V4L2_COLORSPACE_SRGB;
624 else if (code != 0)
625 priv->colorspace = V4L2_COLORSPACE_JPEG;
626
627 if (half_scale) {
628 dev_dbg(&client->dev, "max resolution: QCIF\n");
629 coma_set |= COMA_QCIF;
630 priv->pclk_max /= 2;
631 } else {
632 dev_dbg(&client->dev, "max resolution: CIF\n");
633 coma_mask |= COMA_QCIF;
634 }
635 priv->half_scale = half_scale;
636
637 if (sense) {
638 if (sense->master_clock == 8000000) {
639 dev_dbg(&client->dev, "8MHz input clock\n");
640 clkrc = CLKRC_6MHz;
641 } else if (sense->master_clock == 12000000) {
642 dev_dbg(&client->dev, "12MHz input clock\n");
643 clkrc = CLKRC_12MHz;
644 } else if (sense->master_clock == 16000000) {
645 dev_dbg(&client->dev, "16MHz input clock\n");
646 clkrc = CLKRC_16MHz;
647 } else if (sense->master_clock == 24000000) {
648 dev_dbg(&client->dev, "24MHz input clock\n");
649 clkrc = CLKRC_24MHz;
650 } else {
651 dev_err(&client->dev,
652 "unspported input clock, check platform data\n");
653 return -EINVAL;
654 }
655 mclk = sense->master_clock;
656 priv->pclk_limit = sense->pixel_clock_max;
657 } else {
658 clkrc = CLKRC_24MHz;
659 mclk = 24000000;
660 priv->pclk_limit = 0;
661 dev_dbg(&client->dev, "using default 24MHz input clock\n");
662 }
663
664 clkrc |= to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
665
666 pclk = priv->pclk_max / GET_CLKRC_DIV(clkrc);
667 dev_dbg(&client->dev, "pixel clock divider: %ld.%ld\n",
668 mclk / pclk, 10 * mclk % pclk / pclk);
669
670 ret = ov6650_s_crop(sd, &a);
671 if (!ret)
672 ret = ov6650_reg_rmw(client, REG_COMA, coma_set, coma_mask);
673 if (!ret)
674 ret = ov6650_reg_write(client, REG_CLKRC, clkrc);
675 if (!ret)
676 ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask);
677
678 if (!ret) {
679 mf->colorspace = priv->colorspace;
680 mf->width = priv->rect.width >> half_scale;
681 mf->height = priv->rect.height >> half_scale;
682 }
683
684 return ret;
685 }
686
ov6650_try_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * mf)687 static int ov6650_try_fmt(struct v4l2_subdev *sd,
688 struct v4l2_mbus_framefmt *mf)
689 {
690 struct i2c_client *client = v4l2_get_subdevdata(sd);
691 struct ov6650 *priv = to_ov6650(client);
692
693 if (is_unscaled_ok(mf->width, mf->height, &priv->rect))
694 v4l_bound_align_image(&mf->width, 2, W_CIF, 1,
695 &mf->height, 2, H_CIF, 1, 0);
696
697 mf->field = V4L2_FIELD_NONE;
698
699 switch (mf->code) {
700 case V4L2_MBUS_FMT_Y10_1X10:
701 mf->code = V4L2_MBUS_FMT_Y8_1X8;
702 case V4L2_MBUS_FMT_Y8_1X8:
703 case V4L2_MBUS_FMT_YVYU8_2X8:
704 case V4L2_MBUS_FMT_YUYV8_2X8:
705 case V4L2_MBUS_FMT_VYUY8_2X8:
706 case V4L2_MBUS_FMT_UYVY8_2X8:
707 mf->colorspace = V4L2_COLORSPACE_JPEG;
708 break;
709 default:
710 mf->code = V4L2_MBUS_FMT_SBGGR8_1X8;
711 case V4L2_MBUS_FMT_SBGGR8_1X8:
712 mf->colorspace = V4L2_COLORSPACE_SRGB;
713 break;
714 }
715
716 return 0;
717 }
718
ov6650_enum_fmt(struct v4l2_subdev * sd,unsigned int index,enum v4l2_mbus_pixelcode * code)719 static int ov6650_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
720 enum v4l2_mbus_pixelcode *code)
721 {
722 if (index >= ARRAY_SIZE(ov6650_codes))
723 return -EINVAL;
724
725 *code = ov6650_codes[index];
726 return 0;
727 }
728
ov6650_g_parm(struct v4l2_subdev * sd,struct v4l2_streamparm * parms)729 static int ov6650_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
730 {
731 struct i2c_client *client = v4l2_get_subdevdata(sd);
732 struct ov6650 *priv = to_ov6650(client);
733 struct v4l2_captureparm *cp = &parms->parm.capture;
734
735 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
736 return -EINVAL;
737
738 memset(cp, 0, sizeof(*cp));
739 cp->capability = V4L2_CAP_TIMEPERFRAME;
740 cp->timeperframe.numerator = GET_CLKRC_DIV(to_clkrc(&priv->tpf,
741 priv->pclk_limit, priv->pclk_max));
742 cp->timeperframe.denominator = FRAME_RATE_MAX;
743
744 dev_dbg(&client->dev, "Frame interval: %u/%u s\n",
745 cp->timeperframe.numerator, cp->timeperframe.denominator);
746
747 return 0;
748 }
749
ov6650_s_parm(struct v4l2_subdev * sd,struct v4l2_streamparm * parms)750 static int ov6650_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
751 {
752 struct i2c_client *client = v4l2_get_subdevdata(sd);
753 struct ov6650 *priv = to_ov6650(client);
754 struct v4l2_captureparm *cp = &parms->parm.capture;
755 struct v4l2_fract *tpf = &cp->timeperframe;
756 int div, ret;
757 u8 clkrc;
758
759 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
760 return -EINVAL;
761
762 if (cp->extendedmode != 0)
763 return -EINVAL;
764
765 if (tpf->numerator == 0 || tpf->denominator == 0)
766 div = 1; /* Reset to full rate */
767 else
768 div = (tpf->numerator * FRAME_RATE_MAX) / tpf->denominator;
769
770 if (div == 0)
771 div = 1;
772 else if (div > GET_CLKRC_DIV(CLKRC_DIV_MASK))
773 div = GET_CLKRC_DIV(CLKRC_DIV_MASK);
774
775 /*
776 * Keep result to be used as tpf limit
777 * for subseqent clock divider calculations
778 */
779 priv->tpf.numerator = div;
780 priv->tpf.denominator = FRAME_RATE_MAX;
781
782 clkrc = to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
783
784 ret = ov6650_reg_rmw(client, REG_CLKRC, clkrc, CLKRC_DIV_MASK);
785 if (!ret) {
786 tpf->numerator = GET_CLKRC_DIV(clkrc);
787 tpf->denominator = FRAME_RATE_MAX;
788 }
789
790 return ret;
791 }
792
793 /* Soft reset the camera. This has nothing to do with the RESET pin! */
ov6650_reset(struct i2c_client * client)794 static int ov6650_reset(struct i2c_client *client)
795 {
796 int ret;
797
798 dev_dbg(&client->dev, "reset\n");
799
800 ret = ov6650_reg_rmw(client, REG_COMA, COMA_RESET, 0);
801 if (ret)
802 dev_err(&client->dev,
803 "An error occurred while entering soft reset!\n");
804
805 return ret;
806 }
807
808 /* program default register values */
ov6650_prog_dflt(struct i2c_client * client)809 static int ov6650_prog_dflt(struct i2c_client *client)
810 {
811 int ret;
812
813 dev_dbg(&client->dev, "initializing\n");
814
815 ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */
816 if (!ret)
817 ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_BAND_FILTER);
818
819 return ret;
820 }
821
ov6650_video_probe(struct i2c_client * client)822 static int ov6650_video_probe(struct i2c_client *client)
823 {
824 u8 pidh, pidl, midh, midl;
825 int ret = 0;
826
827 /*
828 * check and show product ID and manufacturer ID
829 */
830 ret = ov6650_reg_read(client, REG_PIDH, &pidh);
831 if (!ret)
832 ret = ov6650_reg_read(client, REG_PIDL, &pidl);
833 if (!ret)
834 ret = ov6650_reg_read(client, REG_MIDH, &midh);
835 if (!ret)
836 ret = ov6650_reg_read(client, REG_MIDL, &midl);
837
838 if (ret)
839 return ret;
840
841 if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) {
842 dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n",
843 pidh, pidl);
844 return -ENODEV;
845 }
846
847 dev_info(&client->dev,
848 "ov6650 Product ID 0x%02x:0x%02x Manufacturer ID 0x%02x:0x%02x\n",
849 pidh, pidl, midh, midl);
850
851 ret = ov6650_reset(client);
852 if (!ret)
853 ret = ov6650_prog_dflt(client);
854
855 return ret;
856 }
857
858 static const struct v4l2_ctrl_ops ov6550_ctrl_ops = {
859 .g_volatile_ctrl = ov6550_g_volatile_ctrl,
860 .s_ctrl = ov6550_s_ctrl,
861 };
862
863 static struct v4l2_subdev_core_ops ov6650_core_ops = {
864 .g_chip_ident = ov6650_g_chip_ident,
865 #ifdef CONFIG_VIDEO_ADV_DEBUG
866 .g_register = ov6650_get_register,
867 .s_register = ov6650_set_register,
868 #endif
869 };
870
871 /* Request bus settings on camera side */
ov6650_g_mbus_config(struct v4l2_subdev * sd,struct v4l2_mbus_config * cfg)872 static int ov6650_g_mbus_config(struct v4l2_subdev *sd,
873 struct v4l2_mbus_config *cfg)
874 {
875 struct i2c_client *client = v4l2_get_subdevdata(sd);
876 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
877
878 cfg->flags = V4L2_MBUS_MASTER |
879 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
880 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
881 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
882 V4L2_MBUS_DATA_ACTIVE_HIGH;
883 cfg->type = V4L2_MBUS_PARALLEL;
884 cfg->flags = soc_camera_apply_board_flags(icl, cfg);
885
886 return 0;
887 }
888
889 /* Alter bus settings on camera side */
ov6650_s_mbus_config(struct v4l2_subdev * sd,const struct v4l2_mbus_config * cfg)890 static int ov6650_s_mbus_config(struct v4l2_subdev *sd,
891 const struct v4l2_mbus_config *cfg)
892 {
893 struct i2c_client *client = v4l2_get_subdevdata(sd);
894 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
895 unsigned long flags = soc_camera_apply_board_flags(icl, cfg);
896 int ret;
897
898 if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
899 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_PCLK_RISING, 0);
900 else
901 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_PCLK_RISING);
902 if (ret)
903 return ret;
904
905 if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
906 ret = ov6650_reg_rmw(client, REG_COMF, COMF_HREF_LOW, 0);
907 else
908 ret = ov6650_reg_rmw(client, REG_COMF, 0, COMF_HREF_LOW);
909 if (ret)
910 return ret;
911
912 if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
913 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_VSYNC_HIGH, 0);
914 else
915 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_VSYNC_HIGH);
916
917 return ret;
918 }
919
920 static struct v4l2_subdev_video_ops ov6650_video_ops = {
921 .s_stream = ov6650_s_stream,
922 .g_mbus_fmt = ov6650_g_fmt,
923 .s_mbus_fmt = ov6650_s_fmt,
924 .try_mbus_fmt = ov6650_try_fmt,
925 .enum_mbus_fmt = ov6650_enum_fmt,
926 .cropcap = ov6650_cropcap,
927 .g_crop = ov6650_g_crop,
928 .s_crop = ov6650_s_crop,
929 .g_parm = ov6650_g_parm,
930 .s_parm = ov6650_s_parm,
931 .g_mbus_config = ov6650_g_mbus_config,
932 .s_mbus_config = ov6650_s_mbus_config,
933 };
934
935 static struct v4l2_subdev_ops ov6650_subdev_ops = {
936 .core = &ov6650_core_ops,
937 .video = &ov6650_video_ops,
938 };
939
940 /*
941 * i2c_driver function
942 */
ov6650_probe(struct i2c_client * client,const struct i2c_device_id * did)943 static int ov6650_probe(struct i2c_client *client,
944 const struct i2c_device_id *did)
945 {
946 struct ov6650 *priv;
947 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
948 int ret;
949
950 if (!icl) {
951 dev_err(&client->dev, "Missing platform_data for driver\n");
952 return -EINVAL;
953 }
954
955 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
956 if (!priv) {
957 dev_err(&client->dev,
958 "Failed to allocate memory for private data!\n");
959 return -ENOMEM;
960 }
961
962 v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops);
963 v4l2_ctrl_handler_init(&priv->hdl, 13);
964 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
965 V4L2_CID_VFLIP, 0, 1, 1, 0);
966 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
967 V4L2_CID_HFLIP, 0, 1, 1, 0);
968 priv->autogain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
969 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
970 priv->gain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
971 V4L2_CID_GAIN, 0, 0x3f, 1, DEF_GAIN);
972 priv->autowb = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
973 V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
974 priv->blue = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
975 V4L2_CID_BLUE_BALANCE, 0, 0xff, 1, DEF_BLUE);
976 priv->red = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
977 V4L2_CID_RED_BALANCE, 0, 0xff, 1, DEF_RED);
978 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
979 V4L2_CID_SATURATION, 0, 0xf, 1, 0x8);
980 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
981 V4L2_CID_HUE, 0, HUE_MASK, 1, DEF_HUE);
982 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
983 V4L2_CID_BRIGHTNESS, 0, 0xff, 1, 0x80);
984 priv->autoexposure = v4l2_ctrl_new_std_menu(&priv->hdl,
985 &ov6550_ctrl_ops, V4L2_CID_EXPOSURE_AUTO,
986 V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO);
987 priv->exposure = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
988 V4L2_CID_EXPOSURE, 0, 0xff, 1, DEF_AECH);
989 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
990 V4L2_CID_GAMMA, 0, 0xff, 1, 0x12);
991
992 priv->subdev.ctrl_handler = &priv->hdl;
993 if (priv->hdl.error) {
994 int err = priv->hdl.error;
995
996 kfree(priv);
997 return err;
998 }
999 v4l2_ctrl_auto_cluster(2, &priv->autogain, 0, true);
1000 v4l2_ctrl_auto_cluster(3, &priv->autowb, 0, true);
1001 v4l2_ctrl_auto_cluster(2, &priv->autoexposure,
1002 V4L2_EXPOSURE_MANUAL, true);
1003
1004 priv->rect.left = DEF_HSTRT << 1;
1005 priv->rect.top = DEF_VSTRT << 1;
1006 priv->rect.width = W_CIF;
1007 priv->rect.height = H_CIF;
1008 priv->half_scale = false;
1009 priv->code = V4L2_MBUS_FMT_YUYV8_2X8;
1010 priv->colorspace = V4L2_COLORSPACE_JPEG;
1011
1012 ret = ov6650_video_probe(client);
1013 if (!ret)
1014 ret = v4l2_ctrl_handler_setup(&priv->hdl);
1015
1016 if (ret) {
1017 v4l2_ctrl_handler_free(&priv->hdl);
1018 kfree(priv);
1019 }
1020
1021 return ret;
1022 }
1023
ov6650_remove(struct i2c_client * client)1024 static int ov6650_remove(struct i2c_client *client)
1025 {
1026 struct ov6650 *priv = to_ov6650(client);
1027
1028 v4l2_device_unregister_subdev(&priv->subdev);
1029 v4l2_ctrl_handler_free(&priv->hdl);
1030 kfree(priv);
1031 return 0;
1032 }
1033
1034 static const struct i2c_device_id ov6650_id[] = {
1035 { "ov6650", 0 },
1036 { }
1037 };
1038 MODULE_DEVICE_TABLE(i2c, ov6650_id);
1039
1040 static struct i2c_driver ov6650_i2c_driver = {
1041 .driver = {
1042 .name = "ov6650",
1043 },
1044 .probe = ov6650_probe,
1045 .remove = ov6650_remove,
1046 .id_table = ov6650_id,
1047 };
1048
ov6650_module_init(void)1049 static int __init ov6650_module_init(void)
1050 {
1051 return i2c_add_driver(&ov6650_i2c_driver);
1052 }
1053
ov6650_module_exit(void)1054 static void __exit ov6650_module_exit(void)
1055 {
1056 i2c_del_driver(&ov6650_i2c_driver);
1057 }
1058
1059 module_init(ov6650_module_init);
1060 module_exit(ov6650_module_exit);
1061
1062 MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV6650");
1063 MODULE_AUTHOR("Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>");
1064 MODULE_LICENSE("GPL v2");
1065