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6
7#include <linux/i2c.h>
8#include <linux/slab.h>
9#include <linux/videodev2.h>
10#include <linux/delay.h>
11#include <linux/module.h>
12#include <asm/div64.h>
13#include <media/v4l2-device.h>
14#include <media/v4l2-ctrls.h>
15#include <media/i2c/mt9v011.h>
16
17MODULE_DESCRIPTION("Micron mt9v011 sensor driver");
18MODULE_AUTHOR("Mauro Carvalho Chehab");
19MODULE_LICENSE("GPL v2");
20
21static int debug;
22module_param(debug, int, 0);
23MODULE_PARM_DESC(debug, "Debug level (0-2)");
24
25#define R00_MT9V011_CHIP_VERSION 0x00
26#define R01_MT9V011_ROWSTART 0x01
27#define R02_MT9V011_COLSTART 0x02
28#define R03_MT9V011_HEIGHT 0x03
29#define R04_MT9V011_WIDTH 0x04
30#define R05_MT9V011_HBLANK 0x05
31#define R06_MT9V011_VBLANK 0x06
32#define R07_MT9V011_OUT_CTRL 0x07
33#define R09_MT9V011_SHUTTER_WIDTH 0x09
34#define R0A_MT9V011_CLK_SPEED 0x0a
35#define R0B_MT9V011_RESTART 0x0b
36#define R0C_MT9V011_SHUTTER_DELAY 0x0c
37#define R0D_MT9V011_RESET 0x0d
38#define R1E_MT9V011_DIGITAL_ZOOM 0x1e
39#define R20_MT9V011_READ_MODE 0x20
40#define R2B_MT9V011_GREEN_1_GAIN 0x2b
41#define R2C_MT9V011_BLUE_GAIN 0x2c
42#define R2D_MT9V011_RED_GAIN 0x2d
43#define R2E_MT9V011_GREEN_2_GAIN 0x2e
44#define R35_MT9V011_GLOBAL_GAIN 0x35
45#define RF1_MT9V011_CHIP_ENABLE 0xf1
46
47#define MT9V011_VERSION 0x8232
48#define MT9V011_REV_B_VERSION 0x8243
49
50struct mt9v011 {
51 struct v4l2_subdev sd;
52#ifdef CONFIG_MEDIA_CONTROLLER
53 struct media_pad pad;
54#endif
55 struct v4l2_ctrl_handler ctrls;
56 unsigned width, height;
57 unsigned xtal;
58 unsigned hflip:1;
59 unsigned vflip:1;
60
61 u16 global_gain, exposure;
62 s16 red_bal, blue_bal;
63};
64
65static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd)
66{
67 return container_of(sd, struct mt9v011, sd);
68}
69
70static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)
71{
72 struct i2c_client *c = v4l2_get_subdevdata(sd);
73 __be16 buffer;
74 int rc, val;
75
76 rc = i2c_master_send(c, &addr, 1);
77 if (rc != 1)
78 v4l2_dbg(0, debug, sd,
79 "i2c i/o error: rc == %d (should be 1)\n", rc);
80
81 msleep(10);
82
83 rc = i2c_master_recv(c, (char *)&buffer, 2);
84 if (rc != 2)
85 v4l2_dbg(0, debug, sd,
86 "i2c i/o error: rc == %d (should be 2)\n", rc);
87
88 val = be16_to_cpu(buffer);
89
90 v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);
91
92 return val;
93}
94
95static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,
96 u16 value)
97{
98 struct i2c_client *c = v4l2_get_subdevdata(sd);
99 unsigned char buffer[3];
100 int rc;
101
102 buffer[0] = addr;
103 buffer[1] = value >> 8;
104 buffer[2] = value & 0xff;
105
106 v4l2_dbg(2, debug, sd,
107 "mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value);
108 rc = i2c_master_send(c, buffer, 3);
109 if (rc != 3)
110 v4l2_dbg(0, debug, sd,
111 "i2c i/o error: rc == %d (should be 3)\n", rc);
112}
113
114
115struct i2c_reg_value {
116 unsigned char reg;
117 u16 value;
118};
119
120
121
122
123
124static const struct i2c_reg_value mt9v011_init_default[] = {
125 { R0D_MT9V011_RESET, 0x0001 },
126 { R0D_MT9V011_RESET, 0x0000 },
127
128 { R0C_MT9V011_SHUTTER_DELAY, 0x0000 },
129 { R09_MT9V011_SHUTTER_WIDTH, 0x1fc },
130
131 { R0A_MT9V011_CLK_SPEED, 0x0000 },
132 { R1E_MT9V011_DIGITAL_ZOOM, 0x0000 },
133
134 { R07_MT9V011_OUT_CTRL, 0x0002 },
135};
136
137
138static u16 calc_mt9v011_gain(s16 lineargain)
139{
140
141 u16 digitalgain = 0;
142 u16 analogmult = 0;
143 u16 analoginit = 0;
144
145 if (lineargain < 0)
146 lineargain = 0;
147
148
149 lineargain += 0x0020;
150
151 if (lineargain > 2047)
152 lineargain = 2047;
153
154 if (lineargain > 1023) {
155 digitalgain = 3;
156 analogmult = 3;
157 analoginit = lineargain / 16;
158 } else if (lineargain > 511) {
159 digitalgain = 1;
160 analogmult = 3;
161 analoginit = lineargain / 8;
162 } else if (lineargain > 255) {
163 analogmult = 3;
164 analoginit = lineargain / 4;
165 } else if (lineargain > 127) {
166 analogmult = 1;
167 analoginit = lineargain / 2;
168 } else
169 analoginit = lineargain;
170
171 return analoginit + (analogmult << 7) + (digitalgain << 9);
172
173}
174
175static void set_balance(struct v4l2_subdev *sd)
176{
177 struct mt9v011 *core = to_mt9v011(sd);
178 u16 green_gain, blue_gain, red_gain;
179 u16 exposure;
180 s16 bal;
181
182 exposure = core->exposure;
183
184 green_gain = calc_mt9v011_gain(core->global_gain);
185
186 bal = core->global_gain;
187 bal += (core->blue_bal * core->global_gain / (1 << 7));
188 blue_gain = calc_mt9v011_gain(bal);
189
190 bal = core->global_gain;
191 bal += (core->red_bal * core->global_gain / (1 << 7));
192 red_gain = calc_mt9v011_gain(bal);
193
194 mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green_gain);
195 mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green_gain);
196 mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
197 mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
198 mt9v011_write(sd, R09_MT9V011_SHUTTER_WIDTH, exposure);
199}
200
201static void calc_fps(struct v4l2_subdev *sd, u32 *numerator, u32 *denominator)
202{
203 struct mt9v011 *core = to_mt9v011(sd);
204 unsigned height, width, hblank, vblank, speed;
205 unsigned row_time, t_time;
206 u64 frames_per_ms;
207 unsigned tmp;
208
209 height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
210 width = mt9v011_read(sd, R04_MT9V011_WIDTH);
211 hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
212 vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
213 speed = mt9v011_read(sd, R0A_MT9V011_CLK_SPEED);
214
215 row_time = (width + 113 + hblank) * (speed + 2);
216 t_time = row_time * (height + vblank + 1);
217
218 frames_per_ms = core->xtal * 1000l;
219 do_div(frames_per_ms, t_time);
220 tmp = frames_per_ms;
221
222 v4l2_dbg(1, debug, sd, "Programmed to %u.%03u fps (%d pixel clcks)\n",
223 tmp / 1000, tmp % 1000, t_time);
224
225 if (numerator && denominator) {
226 *numerator = 1000;
227 *denominator = (u32)frames_per_ms;
228 }
229}
230
231static u16 calc_speed(struct v4l2_subdev *sd, u32 numerator, u32 denominator)
232{
233 struct mt9v011 *core = to_mt9v011(sd);
234 unsigned height, width, hblank, vblank;
235 unsigned row_time, line_time;
236 u64 t_time, speed;
237
238
239 if (!numerator || !denominator)
240 return 0;
241
242 height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
243 width = mt9v011_read(sd, R04_MT9V011_WIDTH);
244 hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
245 vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
246
247 row_time = width + 113 + hblank;
248 line_time = height + vblank + 1;
249
250 t_time = core->xtal * ((u64)numerator);
251
252 t_time += denominator / 2;
253 do_div(t_time, denominator);
254
255 speed = t_time;
256 do_div(speed, row_time * line_time);
257
258
259 if (speed < 2)
260 speed = 0;
261 else
262 speed -= 2;
263
264
265 if (speed > 15)
266 return 15;
267
268 return (u16)speed;
269}
270
271static void set_res(struct v4l2_subdev *sd)
272{
273 struct mt9v011 *core = to_mt9v011(sd);
274 unsigned vstart, hstart;
275
276
277
278
279
280
281
282
283
284
285
286
287 hstart = 20 + (640 - core->width) / 2;
288 mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);
289 mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);
290 mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);
291
292 vstart = 8 + (480 - core->height) / 2;
293 mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);
294 mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);
295 mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);
296
297 calc_fps(sd, NULL, NULL);
298};
299
300static void set_read_mode(struct v4l2_subdev *sd)
301{
302 struct mt9v011 *core = to_mt9v011(sd);
303 unsigned mode = 0x1000;
304
305 if (core->hflip)
306 mode |= 0x4000;
307
308 if (core->vflip)
309 mode |= 0x8000;
310
311 mt9v011_write(sd, R20_MT9V011_READ_MODE, mode);
312}
313
314static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)
315{
316 int i;
317
318 for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++)
319 mt9v011_write(sd, mt9v011_init_default[i].reg,
320 mt9v011_init_default[i].value);
321
322 set_balance(sd);
323 set_res(sd);
324 set_read_mode(sd);
325
326 return 0;
327}
328
329static int mt9v011_enum_mbus_code(struct v4l2_subdev *sd,
330 struct v4l2_subdev_pad_config *cfg,
331 struct v4l2_subdev_mbus_code_enum *code)
332{
333 if (code->pad || code->index > 0)
334 return -EINVAL;
335
336 code->code = MEDIA_BUS_FMT_SGRBG8_1X8;
337 return 0;
338}
339
340static int mt9v011_set_fmt(struct v4l2_subdev *sd,
341 struct v4l2_subdev_pad_config *cfg,
342 struct v4l2_subdev_format *format)
343{
344 struct v4l2_mbus_framefmt *fmt = &format->format;
345 struct mt9v011 *core = to_mt9v011(sd);
346
347 if (format->pad || fmt->code != MEDIA_BUS_FMT_SGRBG8_1X8)
348 return -EINVAL;
349
350 v4l_bound_align_image(&fmt->width, 48, 639, 1,
351 &fmt->height, 32, 480, 1, 0);
352 fmt->field = V4L2_FIELD_NONE;
353 fmt->colorspace = V4L2_COLORSPACE_SRGB;
354
355 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
356 core->width = fmt->width;
357 core->height = fmt->height;
358
359 set_res(sd);
360 } else {
361 cfg->try_fmt = *fmt;
362 }
363
364 return 0;
365}
366
367static int mt9v011_g_frame_interval(struct v4l2_subdev *sd,
368 struct v4l2_subdev_frame_interval *ival)
369{
370 calc_fps(sd,
371 &ival->interval.numerator,
372 &ival->interval.denominator);
373
374 return 0;
375}
376
377static int mt9v011_s_frame_interval(struct v4l2_subdev *sd,
378 struct v4l2_subdev_frame_interval *ival)
379{
380 struct v4l2_fract *tpf = &ival->interval;
381 u16 speed;
382
383 speed = calc_speed(sd, tpf->numerator, tpf->denominator);
384
385 mt9v011_write(sd, R0A_MT9V011_CLK_SPEED, speed);
386 v4l2_dbg(1, debug, sd, "Setting speed to %d\n", speed);
387
388
389 calc_fps(sd, &tpf->numerator, &tpf->denominator);
390
391 return 0;
392}
393
394#ifdef CONFIG_VIDEO_ADV_DEBUG
395static int mt9v011_g_register(struct v4l2_subdev *sd,
396 struct v4l2_dbg_register *reg)
397{
398 reg->val = mt9v011_read(sd, reg->reg & 0xff);
399 reg->size = 2;
400
401 return 0;
402}
403
404static int mt9v011_s_register(struct v4l2_subdev *sd,
405 const struct v4l2_dbg_register *reg)
406{
407 mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);
408
409 return 0;
410}
411#endif
412
413static int mt9v011_s_ctrl(struct v4l2_ctrl *ctrl)
414{
415 struct mt9v011 *core =
416 container_of(ctrl->handler, struct mt9v011, ctrls);
417 struct v4l2_subdev *sd = &core->sd;
418
419 switch (ctrl->id) {
420 case V4L2_CID_GAIN:
421 core->global_gain = ctrl->val;
422 break;
423 case V4L2_CID_EXPOSURE:
424 core->exposure = ctrl->val;
425 break;
426 case V4L2_CID_RED_BALANCE:
427 core->red_bal = ctrl->val;
428 break;
429 case V4L2_CID_BLUE_BALANCE:
430 core->blue_bal = ctrl->val;
431 break;
432 case V4L2_CID_HFLIP:
433 core->hflip = ctrl->val;
434 set_read_mode(sd);
435 return 0;
436 case V4L2_CID_VFLIP:
437 core->vflip = ctrl->val;
438 set_read_mode(sd);
439 return 0;
440 default:
441 return -EINVAL;
442 }
443
444 set_balance(sd);
445 return 0;
446}
447
448static const struct v4l2_ctrl_ops mt9v011_ctrl_ops = {
449 .s_ctrl = mt9v011_s_ctrl,
450};
451
452static const struct v4l2_subdev_core_ops mt9v011_core_ops = {
453 .reset = mt9v011_reset,
454#ifdef CONFIG_VIDEO_ADV_DEBUG
455 .g_register = mt9v011_g_register,
456 .s_register = mt9v011_s_register,
457#endif
458};
459
460static const struct v4l2_subdev_video_ops mt9v011_video_ops = {
461 .g_frame_interval = mt9v011_g_frame_interval,
462 .s_frame_interval = mt9v011_s_frame_interval,
463};
464
465static const struct v4l2_subdev_pad_ops mt9v011_pad_ops = {
466 .enum_mbus_code = mt9v011_enum_mbus_code,
467 .set_fmt = mt9v011_set_fmt,
468};
469
470static const struct v4l2_subdev_ops mt9v011_ops = {
471 .core = &mt9v011_core_ops,
472 .video = &mt9v011_video_ops,
473 .pad = &mt9v011_pad_ops,
474};
475
476
477
478
479
480
481static int mt9v011_probe(struct i2c_client *c,
482 const struct i2c_device_id *id)
483{
484 u16 version;
485 struct mt9v011 *core;
486 struct v4l2_subdev *sd;
487#ifdef CONFIG_MEDIA_CONTROLLER
488 int ret;
489#endif
490
491
492 if (!i2c_check_functionality(c->adapter,
493 I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
494 return -EIO;
495
496 core = devm_kzalloc(&c->dev, sizeof(struct mt9v011), GFP_KERNEL);
497 if (!core)
498 return -ENOMEM;
499
500 sd = &core->sd;
501 v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);
502
503#ifdef CONFIG_MEDIA_CONTROLLER
504 core->pad.flags = MEDIA_PAD_FL_SOURCE;
505 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
506
507 ret = media_entity_pads_init(&sd->entity, 1, &core->pad);
508 if (ret < 0)
509 return ret;
510#endif
511
512
513 version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
514 if ((version != MT9V011_VERSION) &&
515 (version != MT9V011_REV_B_VERSION)) {
516 v4l2_info(sd, "*** unknown micron chip detected (0x%04x).\n",
517 version);
518 return -EINVAL;
519 }
520
521 v4l2_ctrl_handler_init(&core->ctrls, 5);
522 v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
523 V4L2_CID_GAIN, 0, (1 << 12) - 1 - 0x20, 1, 0x20);
524 v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
525 V4L2_CID_EXPOSURE, 0, 2047, 1, 0x01fc);
526 v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
527 V4L2_CID_RED_BALANCE, -(1 << 9), (1 << 9) - 1, 1, 0);
528 v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
529 V4L2_CID_BLUE_BALANCE, -(1 << 9), (1 << 9) - 1, 1, 0);
530 v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
531 V4L2_CID_HFLIP, 0, 1, 1, 0);
532 v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
533 V4L2_CID_VFLIP, 0, 1, 1, 0);
534
535 if (core->ctrls.error) {
536 int ret = core->ctrls.error;
537
538 v4l2_err(sd, "control initialization error %d\n", ret);
539 v4l2_ctrl_handler_free(&core->ctrls);
540 return ret;
541 }
542 core->sd.ctrl_handler = &core->ctrls;
543
544 core->global_gain = 0x0024;
545 core->exposure = 0x01fc;
546 core->width = 640;
547 core->height = 480;
548 core->xtal = 27000000;
549
550 if (c->dev.platform_data) {
551 struct mt9v011_platform_data *pdata = c->dev.platform_data;
552
553 core->xtal = pdata->xtal;
554 v4l2_dbg(1, debug, sd, "xtal set to %d.%03d MHz\n",
555 core->xtal / 1000000, (core->xtal / 1000) % 1000);
556 }
557
558 v4l_info(c, "chip found @ 0x%02x (%s - chip version 0x%04x)\n",
559 c->addr << 1, c->adapter->name, version);
560
561 return 0;
562}
563
564static int mt9v011_remove(struct i2c_client *c)
565{
566 struct v4l2_subdev *sd = i2c_get_clientdata(c);
567 struct mt9v011 *core = to_mt9v011(sd);
568
569 v4l2_dbg(1, debug, sd,
570 "mt9v011.c: removing mt9v011 adapter on address 0x%x\n",
571 c->addr << 1);
572
573 v4l2_device_unregister_subdev(sd);
574 v4l2_ctrl_handler_free(&core->ctrls);
575
576 return 0;
577}
578
579
580
581static const struct i2c_device_id mt9v011_id[] = {
582 { "mt9v011", 0 },
583 { }
584};
585MODULE_DEVICE_TABLE(i2c, mt9v011_id);
586
587static struct i2c_driver mt9v011_driver = {
588 .driver = {
589 .name = "mt9v011",
590 },
591 .probe = mt9v011_probe,
592 .remove = mt9v011_remove,
593 .id_table = mt9v011_id,
594};
595
596module_i2c_driver(mt9v011_driver);
597
