1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Support for OmniVision OV2722 1080p HD camera sensor.
4 *
5 * Copyright (c) 2013 Intel Corporation. All Rights Reserved.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License version
9 * 2 as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 */
17
18 #include <linux/module.h>
19 #include <linux/types.h>
20 #include <linux/kernel.h>
21 #include <linux/mm.h>
22 #include <linux/string.h>
23 #include <linux/errno.h>
24 #include <linux/init.h>
25 #include <linux/kmod.h>
26 #include <linux/device.h>
27 #include <linux/delay.h>
28 #include <linux/slab.h>
29 #include <linux/i2c.h>
30 #include <linux/moduleparam.h>
31 #include <media/v4l2-device.h>
32 #include "../include/linux/atomisp_gmin_platform.h"
33 #include <linux/acpi.h>
34 #include <linux/io.h>
35
36 #include "ov2722.h"
37
38 /* i2c read/write stuff */
ov2722_read_reg(struct i2c_client * client,u16 data_length,u16 reg,u16 * val)39 static int ov2722_read_reg(struct i2c_client *client,
40 u16 data_length, u16 reg, u16 *val)
41 {
42 int err;
43 struct i2c_msg msg[2];
44 unsigned char data[6];
45
46 if (!client->adapter) {
47 dev_err(&client->dev, "%s error, no client->adapter\n",
48 __func__);
49 return -ENODEV;
50 }
51
52 if (data_length != OV2722_8BIT && data_length != OV2722_16BIT &&
53 data_length != OV2722_32BIT) {
54 dev_err(&client->dev, "%s error, invalid data length\n",
55 __func__);
56 return -EINVAL;
57 }
58
59 memset(msg, 0, sizeof(msg));
60
61 msg[0].addr = client->addr;
62 msg[0].flags = 0;
63 msg[0].len = I2C_MSG_LENGTH;
64 msg[0].buf = data;
65
66 /* high byte goes out first */
67 data[0] = (u8)(reg >> 8);
68 data[1] = (u8)(reg & 0xff);
69
70 msg[1].addr = client->addr;
71 msg[1].len = data_length;
72 msg[1].flags = I2C_M_RD;
73 msg[1].buf = data;
74
75 err = i2c_transfer(client->adapter, msg, 2);
76 if (err != 2) {
77 if (err >= 0)
78 err = -EIO;
79 dev_err(&client->dev,
80 "read from offset 0x%x error %d", reg, err);
81 return err;
82 }
83
84 *val = 0;
85 /* high byte comes first */
86 if (data_length == OV2722_8BIT)
87 *val = (u8)data[0];
88 else if (data_length == OV2722_16BIT)
89 *val = be16_to_cpu(*(__be16 *)&data[0]);
90 else
91 *val = be32_to_cpu(*(__be32 *)&data[0]);
92
93 return 0;
94 }
95
ov2722_i2c_write(struct i2c_client * client,u16 len,u8 * data)96 static int ov2722_i2c_write(struct i2c_client *client, u16 len, u8 *data)
97 {
98 struct i2c_msg msg;
99 const int num_msg = 1;
100 int ret;
101
102 msg.addr = client->addr;
103 msg.flags = 0;
104 msg.len = len;
105 msg.buf = data;
106 ret = i2c_transfer(client->adapter, &msg, 1);
107
108 return ret == num_msg ? 0 : -EIO;
109 }
110
ov2722_write_reg(struct i2c_client * client,u16 data_length,u16 reg,u16 val)111 static int ov2722_write_reg(struct i2c_client *client, u16 data_length,
112 u16 reg, u16 val)
113 {
114 int ret;
115 unsigned char data[4] = {0};
116 __be16 *wreg = (__be16 *)data;
117 const u16 len = data_length + sizeof(u16); /* 16-bit address + data */
118
119 if (data_length != OV2722_8BIT && data_length != OV2722_16BIT) {
120 dev_err(&client->dev,
121 "%s error, invalid data_length\n", __func__);
122 return -EINVAL;
123 }
124
125 /* high byte goes out first */
126 *wreg = cpu_to_be16(reg);
127
128 if (data_length == OV2722_8BIT) {
129 data[2] = (u8)(val);
130 } else {
131 /* OV2722_16BIT */
132 __be16 *wdata = (__be16 *)&data[2];
133
134 *wdata = cpu_to_be16(val);
135 }
136
137 ret = ov2722_i2c_write(client, len, data);
138 if (ret)
139 dev_err(&client->dev,
140 "write error: wrote 0x%x to offset 0x%x error %d",
141 val, reg, ret);
142
143 return ret;
144 }
145
146 /*
147 * ov2722_write_reg_array - Initializes a list of OV2722 registers
148 * @client: i2c driver client structure
149 * @reglist: list of registers to be written
150 *
151 * This function initializes a list of registers. When consecutive addresses
152 * are found in a row on the list, this function creates a buffer and sends
153 * consecutive data in a single i2c_transfer().
154 *
155 * __ov2722_flush_reg_array, __ov2722_buf_reg_array() and
156 * __ov2722_write_reg_is_consecutive() are internal functions to
157 * ov2722_write_reg_array_fast() and should be not used anywhere else.
158 *
159 */
160
__ov2722_flush_reg_array(struct i2c_client * client,struct ov2722_write_ctrl * ctrl)161 static int __ov2722_flush_reg_array(struct i2c_client *client,
162 struct ov2722_write_ctrl *ctrl)
163 {
164 u16 size;
165 __be16 *data16 = (void *)&ctrl->buffer.addr;
166
167 if (ctrl->index == 0)
168 return 0;
169
170 size = sizeof(u16) + ctrl->index; /* 16-bit address + data */
171 *data16 = cpu_to_be16(ctrl->buffer.addr);
172 ctrl->index = 0;
173
174 return ov2722_i2c_write(client, size, (u8 *)&ctrl->buffer);
175 }
176
__ov2722_buf_reg_array(struct i2c_client * client,struct ov2722_write_ctrl * ctrl,const struct ov2722_reg * next)177 static int __ov2722_buf_reg_array(struct i2c_client *client,
178 struct ov2722_write_ctrl *ctrl,
179 const struct ov2722_reg *next)
180 {
181 int size;
182 __be16 *data16;
183
184 switch (next->type) {
185 case OV2722_8BIT:
186 size = 1;
187 ctrl->buffer.data[ctrl->index] = (u8)next->val;
188 break;
189 case OV2722_16BIT:
190 size = 2;
191 data16 = (void *)&ctrl->buffer.data[ctrl->index];
192 *data16 = cpu_to_be16((u16)next->val);
193 break;
194 default:
195 return -EINVAL;
196 }
197
198 /* When first item is added, we need to store its starting address */
199 if (ctrl->index == 0)
200 ctrl->buffer.addr = next->reg;
201
202 ctrl->index += size;
203
204 /*
205 * Buffer cannot guarantee free space for u32? Better flush it to avoid
206 * possible lack of memory for next item.
207 */
208 if (ctrl->index + sizeof(u16) >= OV2722_MAX_WRITE_BUF_SIZE)
209 return __ov2722_flush_reg_array(client, ctrl);
210
211 return 0;
212 }
213
__ov2722_write_reg_is_consecutive(struct i2c_client * client,struct ov2722_write_ctrl * ctrl,const struct ov2722_reg * next)214 static int __ov2722_write_reg_is_consecutive(struct i2c_client *client,
215 struct ov2722_write_ctrl *ctrl,
216 const struct ov2722_reg *next)
217 {
218 if (ctrl->index == 0)
219 return 1;
220
221 return ctrl->buffer.addr + ctrl->index == next->reg;
222 }
223
ov2722_write_reg_array(struct i2c_client * client,const struct ov2722_reg * reglist)224 static int ov2722_write_reg_array(struct i2c_client *client,
225 const struct ov2722_reg *reglist)
226 {
227 const struct ov2722_reg *next = reglist;
228 struct ov2722_write_ctrl ctrl;
229 int err;
230
231 ctrl.index = 0;
232 for (; next->type != OV2722_TOK_TERM; next++) {
233 switch (next->type & OV2722_TOK_MASK) {
234 case OV2722_TOK_DELAY:
235 err = __ov2722_flush_reg_array(client, &ctrl);
236 if (err)
237 return err;
238 msleep(next->val);
239 break;
240 default:
241 /*
242 * If next address is not consecutive, data needs to be
243 * flushed before proceed.
244 */
245 if (!__ov2722_write_reg_is_consecutive(client, &ctrl,
246 next)) {
247 err = __ov2722_flush_reg_array(client, &ctrl);
248 if (err)
249 return err;
250 }
251 err = __ov2722_buf_reg_array(client, &ctrl, next);
252 if (err) {
253 dev_err(&client->dev, "%s: write error, aborted\n",
254 __func__);
255 return err;
256 }
257 break;
258 }
259 }
260
261 return __ov2722_flush_reg_array(client, &ctrl);
262 }
263
__ov2722_set_exposure(struct v4l2_subdev * sd,int coarse_itg,int gain,int digitgain)264 static long __ov2722_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
265 int gain, int digitgain)
266
267 {
268 struct i2c_client *client = v4l2_get_subdevdata(sd);
269 struct ov2722_device *dev = to_ov2722_sensor(sd);
270 u16 hts, vts;
271 int ret;
272
273 dev_dbg(&client->dev, "set_exposure without group hold\n");
274
275 /* clear VTS_DIFF on manual mode */
276 ret = ov2722_write_reg(client, OV2722_16BIT, OV2722_VTS_DIFF_H, 0);
277 if (ret)
278 return ret;
279
280 hts = dev->pixels_per_line;
281 vts = dev->lines_per_frame;
282
283 if ((coarse_itg + OV2722_COARSE_INTG_TIME_MAX_MARGIN) > vts)
284 vts = coarse_itg + OV2722_COARSE_INTG_TIME_MAX_MARGIN;
285
286 coarse_itg <<= 4;
287 digitgain <<= 2;
288
289 ret = ov2722_write_reg(client, OV2722_16BIT,
290 OV2722_VTS_H, vts);
291 if (ret)
292 return ret;
293
294 ret = ov2722_write_reg(client, OV2722_16BIT,
295 OV2722_HTS_H, hts);
296 if (ret)
297 return ret;
298
299 /* set exposure */
300 ret = ov2722_write_reg(client, OV2722_8BIT,
301 OV2722_AEC_PK_EXPO_L,
302 coarse_itg & 0xff);
303 if (ret)
304 return ret;
305
306 ret = ov2722_write_reg(client, OV2722_16BIT,
307 OV2722_AEC_PK_EXPO_H,
308 (coarse_itg >> 8) & 0xfff);
309 if (ret)
310 return ret;
311
312 /* set analog gain */
313 ret = ov2722_write_reg(client, OV2722_16BIT,
314 OV2722_AGC_ADJ_H, gain);
315 if (ret)
316 return ret;
317
318 /* set digital gain */
319 ret = ov2722_write_reg(client, OV2722_16BIT,
320 OV2722_MWB_GAIN_R_H, digitgain);
321 if (ret)
322 return ret;
323
324 ret = ov2722_write_reg(client, OV2722_16BIT,
325 OV2722_MWB_GAIN_G_H, digitgain);
326 if (ret)
327 return ret;
328
329 ret = ov2722_write_reg(client, OV2722_16BIT,
330 OV2722_MWB_GAIN_B_H, digitgain);
331
332 return ret;
333 }
334
ov2722_set_exposure(struct v4l2_subdev * sd,int exposure,int gain,int digitgain)335 static int ov2722_set_exposure(struct v4l2_subdev *sd, int exposure,
336 int gain, int digitgain)
337 {
338 struct ov2722_device *dev = to_ov2722_sensor(sd);
339 int ret;
340
341 mutex_lock(&dev->input_lock);
342 ret = __ov2722_set_exposure(sd, exposure, gain, digitgain);
343 mutex_unlock(&dev->input_lock);
344
345 return ret;
346 }
347
ov2722_s_exposure(struct v4l2_subdev * sd,struct atomisp_exposure * exposure)348 static long ov2722_s_exposure(struct v4l2_subdev *sd,
349 struct atomisp_exposure *exposure)
350 {
351 int exp = exposure->integration_time[0];
352 int gain = exposure->gain[0];
353 int digitgain = exposure->gain[1];
354
355 /* we should not accept the invalid value below. */
356 if (gain == 0) {
357 struct i2c_client *client = v4l2_get_subdevdata(sd);
358
359 v4l2_err(client, "%s: invalid value\n", __func__);
360 return -EINVAL;
361 }
362
363 return ov2722_set_exposure(sd, exp, gain, digitgain);
364 }
365
ov2722_ioctl(struct v4l2_subdev * sd,unsigned int cmd,void * arg)366 static long ov2722_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
367 {
368 switch (cmd) {
369 case ATOMISP_IOC_S_EXPOSURE:
370 return ov2722_s_exposure(sd, arg);
371 default:
372 return -EINVAL;
373 }
374 return 0;
375 }
376
377 /* This returns the exposure time being used. This should only be used
378 * for filling in EXIF data, not for actual image processing.
379 */
ov2722_q_exposure(struct v4l2_subdev * sd,s32 * value)380 static int ov2722_q_exposure(struct v4l2_subdev *sd, s32 *value)
381 {
382 struct i2c_client *client = v4l2_get_subdevdata(sd);
383 u16 reg_v, reg_v2;
384 int ret;
385
386 /* get exposure */
387 ret = ov2722_read_reg(client, OV2722_8BIT,
388 OV2722_AEC_PK_EXPO_L,
389 ®_v);
390 if (ret)
391 goto err;
392
393 ret = ov2722_read_reg(client, OV2722_8BIT,
394 OV2722_AEC_PK_EXPO_M,
395 ®_v2);
396 if (ret)
397 goto err;
398
399 reg_v += reg_v2 << 8;
400 ret = ov2722_read_reg(client, OV2722_8BIT,
401 OV2722_AEC_PK_EXPO_H,
402 ®_v2);
403 if (ret)
404 goto err;
405
406 *value = reg_v + (((u32)reg_v2 << 16));
407 err:
408 return ret;
409 }
410
ov2722_g_volatile_ctrl(struct v4l2_ctrl * ctrl)411 static int ov2722_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
412 {
413 struct ov2722_device *dev =
414 container_of(ctrl->handler, struct ov2722_device, ctrl_handler);
415 int ret = 0;
416 unsigned int val;
417
418 switch (ctrl->id) {
419 case V4L2_CID_EXPOSURE_ABSOLUTE:
420 ret = ov2722_q_exposure(&dev->sd, &ctrl->val);
421 break;
422 case V4L2_CID_LINK_FREQ:
423 val = dev->res->mipi_freq;
424 if (val == 0)
425 return -EINVAL;
426
427 ctrl->val = val * 1000; /* To Hz */
428 break;
429 default:
430 ret = -EINVAL;
431 }
432
433 return ret;
434 }
435
436 static const struct v4l2_ctrl_ops ctrl_ops = {
437 .g_volatile_ctrl = ov2722_g_volatile_ctrl
438 };
439
440 static const struct v4l2_ctrl_config ov2722_controls[] = {
441 {
442 .ops = &ctrl_ops,
443 .id = V4L2_CID_EXPOSURE_ABSOLUTE,
444 .type = V4L2_CTRL_TYPE_INTEGER,
445 .name = "exposure",
446 .min = 0x0,
447 .max = 0xffff,
448 .step = 0x01,
449 .def = 0x00,
450 .flags = 0,
451 },
452 {
453 .ops = &ctrl_ops,
454 .id = V4L2_CID_LINK_FREQ,
455 .name = "Link Frequency",
456 .type = V4L2_CTRL_TYPE_INTEGER,
457 .min = 1,
458 .max = 1500000 * 1000,
459 .step = 1,
460 .def = 1,
461 .flags = V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY,
462 },
463 };
464
ov2722_init(struct v4l2_subdev * sd)465 static int ov2722_init(struct v4l2_subdev *sd)
466 {
467 struct ov2722_device *dev = to_ov2722_sensor(sd);
468
469 mutex_lock(&dev->input_lock);
470
471 /* restore settings */
472 ov2722_res = ov2722_res_preview;
473 N_RES = N_RES_PREVIEW;
474
475 mutex_unlock(&dev->input_lock);
476
477 return 0;
478 }
479
power_ctrl(struct v4l2_subdev * sd,bool flag)480 static int power_ctrl(struct v4l2_subdev *sd, bool flag)
481 {
482 int ret = -1;
483 struct ov2722_device *dev = to_ov2722_sensor(sd);
484
485 if (!dev || !dev->platform_data)
486 return -ENODEV;
487
488 if (flag) {
489 ret = dev->platform_data->v1p8_ctrl(sd, 1);
490 if (ret == 0) {
491 ret = dev->platform_data->v2p8_ctrl(sd, 1);
492 if (ret)
493 dev->platform_data->v1p8_ctrl(sd, 0);
494 }
495 } else {
496 ret = dev->platform_data->v1p8_ctrl(sd, 0);
497 ret |= dev->platform_data->v2p8_ctrl(sd, 0);
498 }
499
500 return ret;
501 }
502
gpio_ctrl(struct v4l2_subdev * sd,bool flag)503 static int gpio_ctrl(struct v4l2_subdev *sd, bool flag)
504 {
505 struct ov2722_device *dev = to_ov2722_sensor(sd);
506 int ret = -1;
507
508 if (!dev || !dev->platform_data)
509 return -ENODEV;
510
511 /* Note: the GPIO order is asymmetric: always RESET#
512 * before PWDN# when turning it on or off.
513 */
514 ret = dev->platform_data->gpio0_ctrl(sd, flag);
515 ret |= dev->platform_data->gpio1_ctrl(sd, flag);
516 return ret;
517 }
518
power_up(struct v4l2_subdev * sd)519 static int power_up(struct v4l2_subdev *sd)
520 {
521 struct ov2722_device *dev = to_ov2722_sensor(sd);
522 struct i2c_client *client = v4l2_get_subdevdata(sd);
523 int ret;
524
525 if (!dev->platform_data) {
526 dev_err(&client->dev,
527 "no camera_sensor_platform_data");
528 return -ENODEV;
529 }
530
531 if (dev->power_on == 1)
532 return 0; /* Already on */
533
534 /* power control */
535 ret = power_ctrl(sd, 1);
536 if (ret)
537 goto fail_power;
538
539 /* according to DS, at least 5ms is needed between DOVDD and PWDN */
540 usleep_range(5000, 6000);
541
542 /* gpio ctrl */
543 ret = gpio_ctrl(sd, 1);
544 if (ret) {
545 ret = gpio_ctrl(sd, 0);
546 if (ret)
547 goto fail_power;
548 }
549
550 /* flis clock control */
551 ret = dev->platform_data->flisclk_ctrl(sd, 1);
552 if (ret)
553 goto fail_clk;
554
555 /* according to DS, 20ms is needed between PWDN and i2c access */
556 msleep(20);
557
558 dev->power_on = 1;
559 return 0;
560
561 fail_clk:
562 gpio_ctrl(sd, 0);
563 fail_power:
564 power_ctrl(sd, 0);
565 dev_err(&client->dev, "sensor power-up failed\n");
566
567 return ret;
568 }
569
power_down(struct v4l2_subdev * sd)570 static int power_down(struct v4l2_subdev *sd)
571 {
572 struct ov2722_device *dev = to_ov2722_sensor(sd);
573 struct i2c_client *client = v4l2_get_subdevdata(sd);
574 int ret = 0;
575
576 if (!dev->platform_data) {
577 dev_err(&client->dev,
578 "no camera_sensor_platform_data");
579 return -ENODEV;
580 }
581
582 if (dev->power_on == 0)
583 return 0; /* Already off */
584
585 ret = dev->platform_data->flisclk_ctrl(sd, 0);
586 if (ret)
587 dev_err(&client->dev, "flisclk failed\n");
588
589 /* gpio ctrl */
590 ret = gpio_ctrl(sd, 0);
591 if (ret) {
592 ret = gpio_ctrl(sd, 0);
593 if (ret)
594 dev_err(&client->dev, "gpio failed 2\n");
595 }
596
597 /* power control */
598 ret = power_ctrl(sd, 0);
599 if (ret)
600 dev_err(&client->dev, "vprog failed.\n");
601
602 dev->power_on = 0;
603 return ret;
604 }
605
ov2722_s_power(struct v4l2_subdev * sd,int on)606 static int ov2722_s_power(struct v4l2_subdev *sd, int on)
607 {
608 int ret;
609
610 if (on == 0)
611 return power_down(sd);
612
613 ret = power_up(sd);
614 if (!ret)
615 return ov2722_init(sd);
616
617 return ret;
618 }
619
620 /* TODO: remove it. */
startup(struct v4l2_subdev * sd)621 static int startup(struct v4l2_subdev *sd)
622 {
623 struct ov2722_device *dev = to_ov2722_sensor(sd);
624 struct i2c_client *client = v4l2_get_subdevdata(sd);
625 int ret = 0;
626
627 ret = ov2722_write_reg(client, OV2722_8BIT,
628 OV2722_SW_RESET, 0x01);
629 if (ret) {
630 dev_err(&client->dev, "ov2722 reset err.\n");
631 return ret;
632 }
633
634 ret = ov2722_write_reg_array(client, dev->res->regs);
635 if (ret) {
636 dev_err(&client->dev, "ov2722 write register err.\n");
637 return ret;
638 }
639
640 return ret;
641 }
642
ov2722_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * format)643 static int ov2722_set_fmt(struct v4l2_subdev *sd,
644 struct v4l2_subdev_state *sd_state,
645 struct v4l2_subdev_format *format)
646 {
647 struct v4l2_mbus_framefmt *fmt = &format->format;
648 struct ov2722_device *dev = to_ov2722_sensor(sd);
649 struct i2c_client *client = v4l2_get_subdevdata(sd);
650 struct ov2722_resolution *res;
651 struct camera_mipi_info *ov2722_info = NULL;
652 int ret = 0;
653
654 if (format->pad)
655 return -EINVAL;
656 if (!fmt)
657 return -EINVAL;
658 ov2722_info = v4l2_get_subdev_hostdata(sd);
659 if (!ov2722_info)
660 return -EINVAL;
661
662 res = v4l2_find_nearest_size(ov2722_res_preview,
663 ARRAY_SIZE(ov2722_res_preview), width,
664 height, fmt->width, fmt->height);
665 if (!res)
666 res = &ov2722_res_preview[N_RES - 1];
667
668 fmt->width = res->width;
669 fmt->height = res->height;
670 dev->res = res;
671
672 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
673 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
674 sd_state->pads->try_fmt = *fmt;
675 return 0;
676 }
677
678 mutex_lock(&dev->input_lock);
679
680 /* s_power has not been called yet for std v4l2 clients (camorama) */
681 power_up(sd);
682
683 dev->pixels_per_line = dev->res->pixels_per_line;
684 dev->lines_per_frame = dev->res->lines_per_frame;
685
686 ret = startup(sd);
687 if (ret) {
688 int i = 0;
689
690 dev_err(&client->dev, "ov2722 startup err, retry to power up\n");
691 for (i = 0; i < OV2722_POWER_UP_RETRY_NUM; i++) {
692 dev_err(&client->dev,
693 "ov2722 retry to power up %d/%d times, result: ",
694 i + 1, OV2722_POWER_UP_RETRY_NUM);
695 power_down(sd);
696 ret = power_up(sd);
697 if (ret) {
698 dev_err(&client->dev, "power up failed, continue\n");
699 continue;
700 }
701 ret = startup(sd);
702 if (ret) {
703 dev_err(&client->dev, " startup FAILED!\n");
704 } else {
705 dev_err(&client->dev, " startup SUCCESS!\n");
706 break;
707 }
708 }
709 if (ret) {
710 dev_err(&client->dev, "ov2722 startup err\n");
711 goto err;
712 }
713 }
714
715 err:
716 mutex_unlock(&dev->input_lock);
717 return ret;
718 }
719
ov2722_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * format)720 static int ov2722_get_fmt(struct v4l2_subdev *sd,
721 struct v4l2_subdev_state *sd_state,
722 struct v4l2_subdev_format *format)
723 {
724 struct v4l2_mbus_framefmt *fmt = &format->format;
725 struct ov2722_device *dev = to_ov2722_sensor(sd);
726
727 if (format->pad)
728 return -EINVAL;
729 if (!fmt)
730 return -EINVAL;
731
732 fmt->width = dev->res->width;
733 fmt->height = dev->res->height;
734 fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
735
736 return 0;
737 }
738
ov2722_detect(struct i2c_client * client)739 static int ov2722_detect(struct i2c_client *client)
740 {
741 struct i2c_adapter *adapter = client->adapter;
742 u16 high = 0, low = 0;
743 u16 id;
744 u8 revision;
745
746 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
747 return -ENODEV;
748
749 ov2722_read_reg(client, OV2722_8BIT,
750 OV2722_SC_CMMN_CHIP_ID_H, &high);
751 ov2722_read_reg(client, OV2722_8BIT,
752 OV2722_SC_CMMN_CHIP_ID_L, &low);
753 id = (high << 8) | low;
754
755 if ((id != OV2722_ID) && (id != OV2720_ID)) {
756 dev_err(&client->dev, "sensor ID error\n");
757 return -ENODEV;
758 }
759
760 high = 0;
761 ov2722_read_reg(client, OV2722_8BIT,
762 OV2722_SC_CMMN_SUB_ID, &high);
763 revision = (u8)high & 0x0f;
764
765 dev_dbg(&client->dev, "sensor_revision = 0x%x\n", revision);
766 dev_dbg(&client->dev, "detect ov2722 success\n");
767 return 0;
768 }
769
ov2722_s_stream(struct v4l2_subdev * sd,int enable)770 static int ov2722_s_stream(struct v4l2_subdev *sd, int enable)
771 {
772 struct ov2722_device *dev = to_ov2722_sensor(sd);
773 struct i2c_client *client = v4l2_get_subdevdata(sd);
774 int ret;
775
776 mutex_lock(&dev->input_lock);
777
778 ret = ov2722_write_reg(client, OV2722_8BIT, OV2722_SW_STREAM,
779 enable ? OV2722_START_STREAMING :
780 OV2722_STOP_STREAMING);
781
782 mutex_unlock(&dev->input_lock);
783 return ret;
784 }
785
ov2722_s_config(struct v4l2_subdev * sd,int irq,void * platform_data)786 static int ov2722_s_config(struct v4l2_subdev *sd,
787 int irq, void *platform_data)
788 {
789 struct ov2722_device *dev = to_ov2722_sensor(sd);
790 struct i2c_client *client = v4l2_get_subdevdata(sd);
791 int ret = 0;
792
793 if (!platform_data)
794 return -ENODEV;
795
796 dev->platform_data =
797 (struct camera_sensor_platform_data *)platform_data;
798
799 mutex_lock(&dev->input_lock);
800
801 /* power off the module, then power on it in future
802 * as first power on by board may not fulfill the
803 * power on sequqence needed by the module
804 */
805 ret = power_down(sd);
806 if (ret) {
807 dev_err(&client->dev, "ov2722 power-off err.\n");
808 goto fail_power_off;
809 }
810
811 ret = power_up(sd);
812 if (ret) {
813 dev_err(&client->dev, "ov2722 power-up err.\n");
814 goto fail_power_on;
815 }
816
817 ret = dev->platform_data->csi_cfg(sd, 1);
818 if (ret)
819 goto fail_csi_cfg;
820
821 /* config & detect sensor */
822 ret = ov2722_detect(client);
823 if (ret) {
824 dev_err(&client->dev, "ov2722_detect err s_config.\n");
825 goto fail_csi_cfg;
826 }
827
828 /* turn off sensor, after probed */
829 ret = power_down(sd);
830 if (ret) {
831 dev_err(&client->dev, "ov2722 power-off err.\n");
832 goto fail_csi_cfg;
833 }
834 mutex_unlock(&dev->input_lock);
835
836 return 0;
837
838 fail_csi_cfg:
839 dev->platform_data->csi_cfg(sd, 0);
840 fail_power_on:
841 power_down(sd);
842 dev_err(&client->dev, "sensor power-gating failed\n");
843 fail_power_off:
844 mutex_unlock(&dev->input_lock);
845 return ret;
846 }
847
ov2722_g_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * interval)848 static int ov2722_g_frame_interval(struct v4l2_subdev *sd,
849 struct v4l2_subdev_frame_interval *interval)
850 {
851 struct ov2722_device *dev = to_ov2722_sensor(sd);
852
853 interval->interval.numerator = 1;
854 interval->interval.denominator = dev->res->fps;
855
856 return 0;
857 }
858
ov2722_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)859 static int ov2722_enum_mbus_code(struct v4l2_subdev *sd,
860 struct v4l2_subdev_state *sd_state,
861 struct v4l2_subdev_mbus_code_enum *code)
862 {
863 if (code->index >= MAX_FMTS)
864 return -EINVAL;
865
866 code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
867 return 0;
868 }
869
ov2722_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)870 static int ov2722_enum_frame_size(struct v4l2_subdev *sd,
871 struct v4l2_subdev_state *sd_state,
872 struct v4l2_subdev_frame_size_enum *fse)
873 {
874 int index = fse->index;
875
876 if (index >= N_RES)
877 return -EINVAL;
878
879 fse->min_width = ov2722_res[index].width;
880 fse->min_height = ov2722_res[index].height;
881 fse->max_width = ov2722_res[index].width;
882 fse->max_height = ov2722_res[index].height;
883
884 return 0;
885 }
886
ov2722_g_skip_frames(struct v4l2_subdev * sd,u32 * frames)887 static int ov2722_g_skip_frames(struct v4l2_subdev *sd, u32 *frames)
888 {
889 struct ov2722_device *dev = to_ov2722_sensor(sd);
890
891 mutex_lock(&dev->input_lock);
892 *frames = dev->res->skip_frames;
893 mutex_unlock(&dev->input_lock);
894
895 return 0;
896 }
897
898 static const struct v4l2_subdev_sensor_ops ov2722_sensor_ops = {
899 .g_skip_frames = ov2722_g_skip_frames,
900 };
901
902 static const struct v4l2_subdev_video_ops ov2722_video_ops = {
903 .s_stream = ov2722_s_stream,
904 .g_frame_interval = ov2722_g_frame_interval,
905 };
906
907 static const struct v4l2_subdev_core_ops ov2722_core_ops = {
908 .s_power = ov2722_s_power,
909 .ioctl = ov2722_ioctl,
910 };
911
912 static const struct v4l2_subdev_pad_ops ov2722_pad_ops = {
913 .enum_mbus_code = ov2722_enum_mbus_code,
914 .enum_frame_size = ov2722_enum_frame_size,
915 .get_fmt = ov2722_get_fmt,
916 .set_fmt = ov2722_set_fmt,
917 };
918
919 static const struct v4l2_subdev_ops ov2722_ops = {
920 .core = &ov2722_core_ops,
921 .video = &ov2722_video_ops,
922 .pad = &ov2722_pad_ops,
923 .sensor = &ov2722_sensor_ops,
924 };
925
ov2722_remove(struct i2c_client * client)926 static void ov2722_remove(struct i2c_client *client)
927 {
928 struct v4l2_subdev *sd = i2c_get_clientdata(client);
929 struct ov2722_device *dev = to_ov2722_sensor(sd);
930
931 dev->platform_data->csi_cfg(sd, 0);
932 v4l2_ctrl_handler_free(&dev->ctrl_handler);
933 v4l2_device_unregister_subdev(sd);
934
935 atomisp_gmin_remove_subdev(sd);
936
937 media_entity_cleanup(&dev->sd.entity);
938 kfree(dev);
939 }
940
__ov2722_init_ctrl_handler(struct ov2722_device * dev)941 static int __ov2722_init_ctrl_handler(struct ov2722_device *dev)
942 {
943 struct v4l2_ctrl_handler *hdl;
944 unsigned int i;
945
946 hdl = &dev->ctrl_handler;
947 v4l2_ctrl_handler_init(&dev->ctrl_handler, ARRAY_SIZE(ov2722_controls));
948 for (i = 0; i < ARRAY_SIZE(ov2722_controls); i++)
949 v4l2_ctrl_new_custom(&dev->ctrl_handler, &ov2722_controls[i],
950 NULL);
951
952 dev->link_freq = v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_LINK_FREQ);
953
954 if (dev->ctrl_handler.error || !dev->link_freq)
955 return dev->ctrl_handler.error;
956
957 dev->sd.ctrl_handler = hdl;
958
959 return 0;
960 }
961
ov2722_probe(struct i2c_client * client)962 static int ov2722_probe(struct i2c_client *client)
963 {
964 struct ov2722_device *dev;
965 void *ovpdev;
966 int ret;
967
968 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
969 if (!dev)
970 return -ENOMEM;
971
972 mutex_init(&dev->input_lock);
973 dev->power_on = -1;
974
975 dev->res = &ov2722_res_preview[0];
976 v4l2_i2c_subdev_init(&dev->sd, client, &ov2722_ops);
977
978 ovpdev = gmin_camera_platform_data(&dev->sd,
979 ATOMISP_INPUT_FORMAT_RAW_10,
980 atomisp_bayer_order_grbg);
981
982 ret = ov2722_s_config(&dev->sd, client->irq, ovpdev);
983 if (ret)
984 goto out_free;
985
986 ret = __ov2722_init_ctrl_handler(dev);
987 if (ret)
988 goto out_ctrl_handler_free;
989
990 dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
991 dev->pad.flags = MEDIA_PAD_FL_SOURCE;
992 dev->format.code = MEDIA_BUS_FMT_SBGGR10_1X10;
993 dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
994
995 ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad);
996 if (ret)
997 ov2722_remove(client);
998
999 return atomisp_register_i2c_module(&dev->sd, ovpdev, RAW_CAMERA);
1000
1001 out_ctrl_handler_free:
1002 v4l2_ctrl_handler_free(&dev->ctrl_handler);
1003
1004 out_free:
1005 atomisp_gmin_remove_subdev(&dev->sd);
1006 v4l2_device_unregister_subdev(&dev->sd);
1007 kfree(dev);
1008 return ret;
1009 }
1010
1011 static const struct acpi_device_id ov2722_acpi_match[] = {
1012 { "INT33FB" },
1013 {},
1014 };
1015 MODULE_DEVICE_TABLE(acpi, ov2722_acpi_match);
1016
1017 static struct i2c_driver ov2722_driver = {
1018 .driver = {
1019 .name = "ov2722",
1020 .acpi_match_table = ov2722_acpi_match,
1021 },
1022 .probe = ov2722_probe,
1023 .remove = ov2722_remove,
1024 };
1025 module_i2c_driver(ov2722_driver);
1026
1027 MODULE_AUTHOR("Wei Liu <wei.liu@intel.com>");
1028 MODULE_DESCRIPTION("A low-level driver for OmniVision 2722 sensors");
1029 MODULE_LICENSE("GPL");
1030