1 // SPDX-License-Identifier: GPL-2.0
3 // mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor
13 #include <media/v4l2-device.h>
14 #include <media/v4l2-ctrls.h>
23 MODULE_PARM_DESC(debug, "Debug level (0-2)");
51 	struct v4l2_subdev sd;  member
58 	unsigned hflip:1;
59 	unsigned vflip:1;
65 static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd)  in to_mt9v011()  argument
67 	return container_of(sd, struct mt9v011, sd);  in to_mt9v011()
70 static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)  in mt9v011_read()  argument
72 	struct i2c_client *c = v4l2_get_subdevdata(sd);  in mt9v011_read()
76 	rc = i2c_master_send(c, &addr, 1);  in mt9v011_read()
77 	if (rc != 1)  in mt9v011_read()
78 		v4l2_dbg(0, debug, sd,  in mt9v011_read()
79 			 "i2c i/o error: rc == %d (should be 1)\n", rc);  in mt9v011_read()
85 		v4l2_dbg(0, debug, sd,  in mt9v011_read()
90 	v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);  in mt9v011_read()
95 static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,  in mt9v011_write()  argument
98 	struct i2c_client *c = v4l2_get_subdevdata(sd);  in mt9v011_write()
103 	buffer[1] = value >> 8;  in mt9v011_write()
106 	v4l2_dbg(2, debug, sd,  in mt9v011_write()
110 		v4l2_dbg(0, debug, sd,  in mt9v011_write()
159 		digitalgain = 1;  in calc_mt9v011_gain()
166 		analogmult = 1;  in calc_mt9v011_gain()
175 static void set_balance(struct v4l2_subdev *sd)  in set_balance()  argument
177 	struct mt9v011 *core = to_mt9v011(sd);  in set_balance()
182 	exposure = core->exposure;  in set_balance()
184 	green_gain = calc_mt9v011_gain(core->global_gain);  in set_balance()
186 	bal = core->global_gain;  in set_balance()
187 	bal += (core->blue_bal * core->global_gain / (1 << 7));  in set_balance()
190 	bal = core->global_gain;  in set_balance()
191 	bal += (core->red_bal * core->global_gain / (1 << 7));  in set_balance()
194 	mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green_gain);  in set_balance()
195 	mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green_gain);  in set_balance()
196 	mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);  in set_balance()
197 	mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);  in set_balance()
198 	mt9v011_write(sd, R09_MT9V011_SHUTTER_WIDTH, exposure);  in set_balance()
201 static void calc_fps(struct v4l2_subdev *sd, u32 *numerator, u32 *denominator)  in calc_fps()  argument
203 	struct mt9v011 *core = to_mt9v011(sd);  in calc_fps()
209 	height = mt9v011_read(sd, R03_MT9V011_HEIGHT);  in calc_fps()
210 	width = mt9v011_read(sd, R04_MT9V011_WIDTH);  in calc_fps()
211 	hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);  in calc_fps()
212 	vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);  in calc_fps()
213 	speed = mt9v011_read(sd, R0A_MT9V011_CLK_SPEED);  in calc_fps()
216 	t_time = row_time * (height + vblank + 1);  in calc_fps()
218 	frames_per_ms = core->xtal * 1000l;  in calc_fps()
222 	v4l2_dbg(1, debug, sd, "Programmed to %u.%03u fps (%d pixel clcks)\n",  in calc_fps()
231 static u16 calc_speed(struct v4l2_subdev *sd, u32 numerator, u32 denominator)  in calc_speed()  argument
233 	struct mt9v011 *core = to_mt9v011(sd);  in calc_speed()
242 	height = mt9v011_read(sd, R03_MT9V011_HEIGHT);  in calc_speed()
243 	width = mt9v011_read(sd, R04_MT9V011_WIDTH);  in calc_speed()
244 	hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);  in calc_speed()
245 	vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);  in calc_speed()
248 	line_time = height + vblank + 1;  in calc_speed()
250 	t_time = core->xtal * ((u64)numerator);  in calc_speed()
262 		speed -= 2;  in calc_speed()
271 static void set_res(struct v4l2_subdev *sd)  in set_res()  argument
273 	struct mt9v011 *core = to_mt9v011(sd);  in set_res()
283 	 * width-1. However, this doesn't work, since one pixel per line will  in set_res()
287 	hstart = 20 + (640 - core->width) / 2;  in set_res()
288 	mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);  in set_res()
289 	mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);  in set_res()
290 	mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);  in set_res()
292 	vstart = 8 + (480 - core->height) / 2;  in set_res()
293 	mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);  in set_res()
294 	mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);  in set_res()
295 	mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);  in set_res()
297 	calc_fps(sd, NULL, NULL);  in set_res()
300 static void set_read_mode(struct v4l2_subdev *sd)  in set_read_mode()  argument
302 	struct mt9v011 *core = to_mt9v011(sd);  in set_read_mode()
305 	if (core->hflip)  in set_read_mode()
308 	if (core->vflip)  in set_read_mode()
311 	mt9v011_write(sd, R20_MT9V011_READ_MODE, mode);  in set_read_mode()
314 static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)  in mt9v011_reset()  argument
319 		mt9v011_write(sd, mt9v011_init_default[i].reg,  in mt9v011_reset()
322 	set_balance(sd);  in mt9v011_reset()
323 	set_res(sd);  in mt9v011_reset()
324 	set_read_mode(sd);  in mt9v011_reset()
329 static int mt9v011_enum_mbus_code(struct v4l2_subdev *sd,  in mt9v011_enum_mbus_code()  argument
333 	if (code->pad || code->index > 0)  in mt9v011_enum_mbus_code()
334 		return -EINVAL;  in mt9v011_enum_mbus_code()
336 	code->code = MEDIA_BUS_FMT_SGRBG8_1X8;  in mt9v011_enum_mbus_code()
340 static int mt9v011_set_fmt(struct v4l2_subdev *sd,  in mt9v011_set_fmt()  argument
344 	struct v4l2_mbus_framefmt *fmt = &format->format;  in mt9v011_set_fmt()
345 	struct mt9v011 *core = to_mt9v011(sd);  in mt9v011_set_fmt()
347 	if (format->pad || fmt->code != MEDIA_BUS_FMT_SGRBG8_1X8)  in mt9v011_set_fmt()
348 		return -EINVAL;  in mt9v011_set_fmt()
350 	v4l_bound_align_image(&fmt->width, 48, 639, 1,  in mt9v011_set_fmt()
351 			      &fmt->height, 32, 480, 1, 0);  in mt9v011_set_fmt()
352 	fmt->field = V4L2_FIELD_NONE;  in mt9v011_set_fmt()
353 	fmt->colorspace = V4L2_COLORSPACE_SRGB;  in mt9v011_set_fmt()
355 	if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {  in mt9v011_set_fmt()
356 		core->width = fmt->width;  in mt9v011_set_fmt()
357 		core->height = fmt->height;  in mt9v011_set_fmt()
359 		set_res(sd);  in mt9v011_set_fmt()
361 		cfg->try_fmt = *fmt;  in mt9v011_set_fmt()
367 static int mt9v011_g_frame_interval(struct v4l2_subdev *sd,  in mt9v011_g_frame_interval()  argument
370 	calc_fps(sd,  in mt9v011_g_frame_interval()
371 		 &ival->interval.numerator,  in mt9v011_g_frame_interval()
372 		 &ival->interval.denominator);  in mt9v011_g_frame_interval()
377 static int mt9v011_s_frame_interval(struct v4l2_subdev *sd,  in mt9v011_s_frame_interval()  argument
380 	struct v4l2_fract *tpf = &ival->interval;  in mt9v011_s_frame_interval()
383 	speed = calc_speed(sd, tpf->numerator, tpf->denominator);  in mt9v011_s_frame_interval()
385 	mt9v011_write(sd, R0A_MT9V011_CLK_SPEED, speed);  in mt9v011_s_frame_interval()
386 	v4l2_dbg(1, debug, sd, "Setting speed to %d\n", speed);  in mt9v011_s_frame_interval()
389 	calc_fps(sd, &tpf->numerator, &tpf->denominator);  in mt9v011_s_frame_interval()
395 static int mt9v011_g_register(struct v4l2_subdev *sd,  in mt9v011_g_register()  argument
398 	reg->val = mt9v011_read(sd, reg->reg & 0xff);  in mt9v011_g_register()
399 	reg->size = 2;  in mt9v011_g_register()
404 static int mt9v011_s_register(struct v4l2_subdev *sd,  in mt9v011_s_register()  argument
407 	mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);  in mt9v011_s_register()
416 		container_of(ctrl->handler, struct mt9v011, ctrls);  in mt9v011_s_ctrl()
417 	struct v4l2_subdev *sd = &core->sd;  in mt9v011_s_ctrl()  local
419 	switch (ctrl->id) {  in mt9v011_s_ctrl()
421 		core->global_gain = ctrl->val;  in mt9v011_s_ctrl()
424 		core->exposure = ctrl->val;  in mt9v011_s_ctrl()
427 		core->red_bal = ctrl->val;  in mt9v011_s_ctrl()
430 		core->blue_bal = ctrl->val;  in mt9v011_s_ctrl()
433 		core->hflip = ctrl->val;  in mt9v011_s_ctrl()
434 		set_read_mode(sd);  in mt9v011_s_ctrl()
437 		core->vflip = ctrl->val;  in mt9v011_s_ctrl()
438 		set_read_mode(sd);  in mt9v011_s_ctrl()
441 		return -EINVAL;  in mt9v011_s_ctrl()
444 	set_balance(sd);  in mt9v011_s_ctrl()
486 	struct v4l2_subdev *sd;  in mt9v011_probe()  local
492 	if (!i2c_check_functionality(c->adapter,  in mt9v011_probe()
494 		return -EIO;  in mt9v011_probe()
496 	core = devm_kzalloc(&c->dev, sizeof(struct mt9v011), GFP_KERNEL);  in mt9v011_probe()
498 		return -ENOMEM;  in mt9v011_probe()
500 	sd = &core->sd;  in mt9v011_probe()
501 	v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);  in mt9v011_probe()
504 	core->pad.flags = MEDIA_PAD_FL_SOURCE;  in mt9v011_probe()
505 	sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;  in mt9v011_probe()
507 	ret = media_entity_pads_init(&sd->entity, 1, &core->pad);  in mt9v011_probe()
513 	version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);  in mt9v011_probe()
516 		v4l2_info(sd, "*** unknown micron chip detected (0x%04x).\n",  in mt9v011_probe()
518 		return -EINVAL;  in mt9v011_probe()
521 	v4l2_ctrl_handler_init(&core->ctrls, 5);  in mt9v011_probe()
522 	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,  in mt9v011_probe()
523 			  V4L2_CID_GAIN, 0, (1 << 12) - 1 - 0x20, 1, 0x20);  in mt9v011_probe()
524 	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,  in mt9v011_probe()
525 			  V4L2_CID_EXPOSURE, 0, 2047, 1, 0x01fc);  in mt9v011_probe()
526 	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,  in mt9v011_probe()
527 			  V4L2_CID_RED_BALANCE, -(1 << 9), (1 << 9) - 1, 1, 0);  in mt9v011_probe()
528 	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,  in mt9v011_probe()
529 			  V4L2_CID_BLUE_BALANCE, -(1 << 9), (1 << 9) - 1, 1, 0);  in mt9v011_probe()
530 	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,  in mt9v011_probe()
531 			  V4L2_CID_HFLIP, 0, 1, 1, 0);  in mt9v011_probe()
532 	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,  in mt9v011_probe()
533 			  V4L2_CID_VFLIP, 0, 1, 1, 0);  in mt9v011_probe()
535 	if (core->ctrls.error) {  in mt9v011_probe()
536 		int ret = core->ctrls.error;  in mt9v011_probe()
538 		v4l2_err(sd, "control initialization error %d\n", ret);  in mt9v011_probe()
539 		v4l2_ctrl_handler_free(&core->ctrls);  in mt9v011_probe()
542 	core->sd.ctrl_handler = &core->ctrls;  in mt9v011_probe()
544 	core->global_gain = 0x0024;  in mt9v011_probe()
545 	core->exposure = 0x01fc;  in mt9v011_probe()
546 	core->width  = 640;  in mt9v011_probe()
547 	core->height = 480;  in mt9v011_probe()
548 	core->xtal = 27000000;	/* Hz */  in mt9v011_probe()
550 	if (c->dev.platform_data) {  in mt9v011_probe()
551 		struct mt9v011_platform_data *pdata = c->dev.platform_data;  in mt9v011_probe()
553 		core->xtal = pdata->xtal;  in mt9v011_probe()
554 		v4l2_dbg(1, debug, sd, "xtal set to %d.%03d MHz\n",  in mt9v011_probe()
555 			core->xtal / 1000000, (core->xtal / 1000) % 1000);  in mt9v011_probe()
558 	v4l_info(c, "chip found @ 0x%02x (%s - chip version 0x%04x)\n",  in mt9v011_probe()
559 		 c->addr << 1, c->adapter->name, version);  in mt9v011_probe()
566 	struct v4l2_subdev *sd = i2c_get_clientdata(c);  in mt9v011_remove()  local
567 	struct mt9v011 *core = to_mt9v011(sd);  in mt9v011_remove()
569 	v4l2_dbg(1, debug, sd,  in mt9v011_remove()
571 		c->addr << 1);  in mt9v011_remove()
573 	v4l2_device_unregister_subdev(sd);  in mt9v011_remove()
574 	v4l2_ctrl_handler_free(&core->ctrls);  in mt9v011_remove()
579 /* ----------------------------------------------------------------------- */