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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
39static 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
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
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
96static 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
111static 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);
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
126 *wreg = cpu_to_be16(reg);
127
128 if (data_length == OV2722_8BIT) {
129 data[2] = (u8)(val);
130 } else {
131
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
148
149
150
151
152
153
154
155
156
157
158
159
160
161static 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;
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
177static 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
199 if (ctrl->index == 0)
200 ctrl->buffer.addr = next->reg;
201
202 ctrl->index += size;
203
204
205
206
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
214static 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
224static 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
243
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
264static int ov2722_g_focal(struct v4l2_subdev *sd, s32 *val)
265{
266 *val = (OV2722_FOCAL_LENGTH_NUM << 16) | OV2722_FOCAL_LENGTH_DEM;
267 return 0;
268}
269
270static int ov2722_g_fnumber(struct v4l2_subdev *sd, s32 *val)
271{
272
273 *val = (OV2722_F_NUMBER_DEFAULT_NUM << 16) | OV2722_F_NUMBER_DEM;
274 return 0;
275}
276
277static int ov2722_g_fnumber_range(struct v4l2_subdev *sd, s32 *val)
278{
279 *val = (OV2722_F_NUMBER_DEFAULT_NUM << 24) |
280 (OV2722_F_NUMBER_DEM << 16) |
281 (OV2722_F_NUMBER_DEFAULT_NUM << 8) | OV2722_F_NUMBER_DEM;
282 return 0;
283}
284
285static int ov2722_get_intg_factor(struct i2c_client *client,
286 struct camera_mipi_info *info,
287 const struct ov2722_resolution *res)
288{
289 struct v4l2_subdev *sd = i2c_get_clientdata(client);
290 struct ov2722_device *dev = NULL;
291 struct atomisp_sensor_mode_data *buf = &info->data;
292 const unsigned int ext_clk_freq_hz = 19200000;
293 const unsigned int pll_invariant_div = 10;
294 unsigned int pix_clk_freq_hz;
295 u16 pre_pll_clk_div;
296 u16 pll_multiplier;
297 u16 op_pix_clk_div;
298 u16 reg_val;
299 int ret;
300
301 if (!info)
302 return -EINVAL;
303
304 dev = to_ov2722_sensor(sd);
305
306
307 ret = ov2722_read_reg(client, OV2722_8BIT,
308 OV2722_SC_CMMN_PLL_CTRL3, &pre_pll_clk_div);
309 if (ret)
310 return ret;
311
312 ret = ov2722_read_reg(client, OV2722_8BIT,
313 OV2722_SC_CMMN_PLL_MULTIPLIER, &pll_multiplier);
314 if (ret)
315 return ret;
316
317 ret = ov2722_read_reg(client, OV2722_8BIT,
318 OV2722_SC_CMMN_PLL_DEBUG_OPT, &op_pix_clk_div);
319 if (ret)
320 return ret;
321
322 pre_pll_clk_div = (pre_pll_clk_div & 0x70) >> 4;
323 if (!pre_pll_clk_div)
324 return -EINVAL;
325
326 pll_multiplier = pll_multiplier & 0x7f;
327 op_pix_clk_div = op_pix_clk_div & 0x03;
328 pix_clk_freq_hz = ext_clk_freq_hz / pre_pll_clk_div * pll_multiplier
329 * op_pix_clk_div / pll_invariant_div;
330
331 dev->vt_pix_clk_freq_mhz = pix_clk_freq_hz;
332 buf->vt_pix_clk_freq_mhz = pix_clk_freq_hz;
333
334
335 buf->coarse_integration_time_min = OV2722_COARSE_INTG_TIME_MIN;
336 buf->coarse_integration_time_max_margin =
337 OV2722_COARSE_INTG_TIME_MAX_MARGIN;
338
339 buf->fine_integration_time_min = OV2722_FINE_INTG_TIME_MIN;
340 buf->fine_integration_time_max_margin =
341 OV2722_FINE_INTG_TIME_MAX_MARGIN;
342
343 buf->fine_integration_time_def = OV2722_FINE_INTG_TIME_MIN;
344 buf->frame_length_lines = res->lines_per_frame;
345 buf->line_length_pck = res->pixels_per_line;
346 buf->read_mode = res->bin_mode;
347
348
349 ret = ov2722_read_reg(client, OV2722_16BIT,
350 OV2722_H_CROP_START_H, ®_val);
351 if (ret)
352 return ret;
353 buf->crop_horizontal_start = reg_val;
354
355 ret = ov2722_read_reg(client, OV2722_16BIT,
356 OV2722_V_CROP_START_H, ®_val);
357 if (ret)
358 return ret;
359 buf->crop_vertical_start = reg_val;
360
361 ret = ov2722_read_reg(client, OV2722_16BIT,
362 OV2722_H_CROP_END_H, ®_val);
363 if (ret)
364 return ret;
365 buf->crop_horizontal_end = reg_val;
366
367 ret = ov2722_read_reg(client, OV2722_16BIT,
368 OV2722_V_CROP_END_H, ®_val);
369 if (ret)
370 return ret;
371 buf->crop_vertical_end = reg_val;
372
373 ret = ov2722_read_reg(client, OV2722_16BIT,
374 OV2722_H_OUTSIZE_H, ®_val);
375 if (ret)
376 return ret;
377 buf->output_width = reg_val;
378
379 ret = ov2722_read_reg(client, OV2722_16BIT,
380 OV2722_V_OUTSIZE_H, ®_val);
381 if (ret)
382 return ret;
383 buf->output_height = reg_val;
384
385 buf->binning_factor_x = res->bin_factor_x ?
386 res->bin_factor_x : 1;
387 buf->binning_factor_y = res->bin_factor_y ?
388 res->bin_factor_y : 1;
389 return 0;
390}
391
392static long __ov2722_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
393 int gain, int digitgain)
394
395{
396 struct i2c_client *client = v4l2_get_subdevdata(sd);
397 struct ov2722_device *dev = to_ov2722_sensor(sd);
398 u16 hts, vts;
399 int ret;
400
401 dev_dbg(&client->dev, "set_exposure without group hold\n");
402
403
404 ret = ov2722_write_reg(client, OV2722_16BIT, OV2722_VTS_DIFF_H, 0);
405 if (ret)
406 return ret;
407
408 hts = dev->pixels_per_line;
409 vts = dev->lines_per_frame;
410
411 if ((coarse_itg + OV2722_COARSE_INTG_TIME_MAX_MARGIN) > vts)
412 vts = coarse_itg + OV2722_COARSE_INTG_TIME_MAX_MARGIN;
413
414 coarse_itg <<= 4;
415 digitgain <<= 2;
416
417 ret = ov2722_write_reg(client, OV2722_16BIT,
418 OV2722_VTS_H, vts);
419 if (ret)
420 return ret;
421
422 ret = ov2722_write_reg(client, OV2722_16BIT,
423 OV2722_HTS_H, hts);
424 if (ret)
425 return ret;
426
427
428 ret = ov2722_write_reg(client, OV2722_8BIT,
429 OV2722_AEC_PK_EXPO_L,
430 coarse_itg & 0xff);
431 if (ret)
432 return ret;
433
434 ret = ov2722_write_reg(client, OV2722_16BIT,
435 OV2722_AEC_PK_EXPO_H,
436 (coarse_itg >> 8) & 0xfff);
437 if (ret)
438 return ret;
439
440
441 ret = ov2722_write_reg(client, OV2722_16BIT,
442 OV2722_AGC_ADJ_H, gain);
443 if (ret)
444 return ret;
445
446
447 ret = ov2722_write_reg(client, OV2722_16BIT,
448 OV2722_MWB_GAIN_R_H, digitgain);
449 if (ret)
450 return ret;
451
452 ret = ov2722_write_reg(client, OV2722_16BIT,
453 OV2722_MWB_GAIN_G_H, digitgain);
454 if (ret)
455 return ret;
456
457 ret = ov2722_write_reg(client, OV2722_16BIT,
458 OV2722_MWB_GAIN_B_H, digitgain);
459
460 return ret;
461}
462
463static int ov2722_set_exposure(struct v4l2_subdev *sd, int exposure,
464 int gain, int digitgain)
465{
466 struct ov2722_device *dev = to_ov2722_sensor(sd);
467 int ret;
468
469 mutex_lock(&dev->input_lock);
470 ret = __ov2722_set_exposure(sd, exposure, gain, digitgain);
471 mutex_unlock(&dev->input_lock);
472
473 return ret;
474}
475
476static long ov2722_s_exposure(struct v4l2_subdev *sd,
477 struct atomisp_exposure *exposure)
478{
479 int exp = exposure->integration_time[0];
480 int gain = exposure->gain[0];
481 int digitgain = exposure->gain[1];
482
483
484 if (gain == 0) {
485 struct i2c_client *client = v4l2_get_subdevdata(sd);
486
487 v4l2_err(client, "%s: invalid value\n", __func__);
488 return -EINVAL;
489 }
490
491 return ov2722_set_exposure(sd, exp, gain, digitgain);
492}
493
494static long ov2722_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
495{
496 switch (cmd) {
497 case ATOMISP_IOC_S_EXPOSURE:
498 return ov2722_s_exposure(sd, arg);
499 default:
500 return -EINVAL;
501 }
502 return 0;
503}
504
505
506
507
508static int ov2722_q_exposure(struct v4l2_subdev *sd, s32 *value)
509{
510 struct i2c_client *client = v4l2_get_subdevdata(sd);
511 u16 reg_v, reg_v2;
512 int ret;
513
514
515 ret = ov2722_read_reg(client, OV2722_8BIT,
516 OV2722_AEC_PK_EXPO_L,
517 ®_v);
518 if (ret)
519 goto err;
520
521 ret = ov2722_read_reg(client, OV2722_8BIT,
522 OV2722_AEC_PK_EXPO_M,
523 ®_v2);
524 if (ret)
525 goto err;
526
527 reg_v += reg_v2 << 8;
528 ret = ov2722_read_reg(client, OV2722_8BIT,
529 OV2722_AEC_PK_EXPO_H,
530 ®_v2);
531 if (ret)
532 goto err;
533
534 *value = reg_v + (((u32)reg_v2 << 16));
535err:
536 return ret;
537}
538
539static int ov2722_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
540{
541 struct ov2722_device *dev =
542 container_of(ctrl->handler, struct ov2722_device, ctrl_handler);
543 int ret = 0;
544 unsigned int val;
545
546 switch (ctrl->id) {
547 case V4L2_CID_EXPOSURE_ABSOLUTE:
548 ret = ov2722_q_exposure(&dev->sd, &ctrl->val);
549 break;
550 case V4L2_CID_FOCAL_ABSOLUTE:
551 ret = ov2722_g_focal(&dev->sd, &ctrl->val);
552 break;
553 case V4L2_CID_FNUMBER_ABSOLUTE:
554 ret = ov2722_g_fnumber(&dev->sd, &ctrl->val);
555 break;
556 case V4L2_CID_FNUMBER_RANGE:
557 ret = ov2722_g_fnumber_range(&dev->sd, &ctrl->val);
558 break;
559 case V4L2_CID_LINK_FREQ:
560 val = ov2722_res[dev->fmt_idx].mipi_freq;
561 if (val == 0)
562 return -EINVAL;
563
564 ctrl->val = val * 1000;
565 break;
566 default:
567 ret = -EINVAL;
568 }
569
570 return ret;
571}
572
573static const struct v4l2_ctrl_ops ctrl_ops = {
574 .g_volatile_ctrl = ov2722_g_volatile_ctrl
575};
576
577static const struct v4l2_ctrl_config ov2722_controls[] = {
578 {
579 .ops = &ctrl_ops,
580 .id = V4L2_CID_EXPOSURE_ABSOLUTE,
581 .type = V4L2_CTRL_TYPE_INTEGER,
582 .name = "exposure",
583 .min = 0x0,
584 .max = 0xffff,
585 .step = 0x01,
586 .def = 0x00,
587 .flags = 0,
588 },
589 {
590 .ops = &ctrl_ops,
591 .id = V4L2_CID_FOCAL_ABSOLUTE,
592 .type = V4L2_CTRL_TYPE_INTEGER,
593 .name = "focal length",
594 .min = OV2722_FOCAL_LENGTH_DEFAULT,
595 .max = OV2722_FOCAL_LENGTH_DEFAULT,
596 .step = 0x01,
597 .def = OV2722_FOCAL_LENGTH_DEFAULT,
598 .flags = 0,
599 },
600 {
601 .ops = &ctrl_ops,
602 .id = V4L2_CID_FNUMBER_ABSOLUTE,
603 .type = V4L2_CTRL_TYPE_INTEGER,
604 .name = "f-number",
605 .min = OV2722_F_NUMBER_DEFAULT,
606 .max = OV2722_F_NUMBER_DEFAULT,
607 .step = 0x01,
608 .def = OV2722_F_NUMBER_DEFAULT,
609 .flags = 0,
610 },
611 {
612 .ops = &ctrl_ops,
613 .id = V4L2_CID_FNUMBER_RANGE,
614 .type = V4L2_CTRL_TYPE_INTEGER,
615 .name = "f-number range",
616 .min = OV2722_F_NUMBER_RANGE,
617 .max = OV2722_F_NUMBER_RANGE,
618 .step = 0x01,
619 .def = OV2722_F_NUMBER_RANGE,
620 .flags = 0,
621 },
622 {
623 .ops = &ctrl_ops,
624 .id = V4L2_CID_LINK_FREQ,
625 .name = "Link Frequency",
626 .type = V4L2_CTRL_TYPE_INTEGER,
627 .min = 1,
628 .max = 1500000 * 1000,
629 .step = 1,
630 .def = 1,
631 .flags = V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY,
632 },
633};
634
635static int ov2722_init(struct v4l2_subdev *sd)
636{
637 struct ov2722_device *dev = to_ov2722_sensor(sd);
638
639 mutex_lock(&dev->input_lock);
640
641
642 ov2722_res = ov2722_res_preview;
643 N_RES = N_RES_PREVIEW;
644
645 mutex_unlock(&dev->input_lock);
646
647 return 0;
648}
649
650static int power_ctrl(struct v4l2_subdev *sd, bool flag)
651{
652 int ret = -1;
653 struct ov2722_device *dev = to_ov2722_sensor(sd);
654
655 if (!dev || !dev->platform_data)
656 return -ENODEV;
657
658 if (flag) {
659 ret = dev->platform_data->v1p8_ctrl(sd, 1);
660 if (ret == 0) {
661 ret = dev->platform_data->v2p8_ctrl(sd, 1);
662 if (ret)
663 dev->platform_data->v1p8_ctrl(sd, 0);
664 }
665 } else {
666 ret = dev->platform_data->v1p8_ctrl(sd, 0);
667 ret |= dev->platform_data->v2p8_ctrl(sd, 0);
668 }
669
670 return ret;
671}
672
673static int gpio_ctrl(struct v4l2_subdev *sd, bool flag)
674{
675 struct ov2722_device *dev = to_ov2722_sensor(sd);
676 int ret = -1;
677
678 if (!dev || !dev->platform_data)
679 return -ENODEV;
680
681
682
683
684 ret = dev->platform_data->gpio0_ctrl(sd, flag);
685
686
687
688 ret |= dev->platform_data->gpio1_ctrl(sd, !flag);
689 return ret;
690}
691
692static int power_up(struct v4l2_subdev *sd)
693{
694 struct ov2722_device *dev = to_ov2722_sensor(sd);
695 struct i2c_client *client = v4l2_get_subdevdata(sd);
696 int ret;
697
698 if (!dev->platform_data) {
699 dev_err(&client->dev,
700 "no camera_sensor_platform_data");
701 return -ENODEV;
702 }
703
704
705 ret = power_ctrl(sd, 1);
706 if (ret)
707 goto fail_power;
708
709
710 usleep_range(5000, 6000);
711
712
713 ret = gpio_ctrl(sd, 1);
714 if (ret) {
715 ret = gpio_ctrl(sd, 0);
716 if (ret)
717 goto fail_power;
718 }
719
720
721 ret = dev->platform_data->flisclk_ctrl(sd, 1);
722 if (ret)
723 goto fail_clk;
724
725
726 msleep(20);
727
728 return 0;
729
730fail_clk:
731 gpio_ctrl(sd, 0);
732fail_power:
733 power_ctrl(sd, 0);
734 dev_err(&client->dev, "sensor power-up failed\n");
735
736 return ret;
737}
738
739static int power_down(struct v4l2_subdev *sd)
740{
741 struct ov2722_device *dev = to_ov2722_sensor(sd);
742 struct i2c_client *client = v4l2_get_subdevdata(sd);
743 int ret = 0;
744
745 if (!dev->platform_data) {
746 dev_err(&client->dev,
747 "no camera_sensor_platform_data");
748 return -ENODEV;
749 }
750
751 ret = dev->platform_data->flisclk_ctrl(sd, 0);
752 if (ret)
753 dev_err(&client->dev, "flisclk failed\n");
754
755
756 ret = gpio_ctrl(sd, 0);
757 if (ret) {
758 ret = gpio_ctrl(sd, 0);
759 if (ret)
760 dev_err(&client->dev, "gpio failed 2\n");
761 }
762
763
764 ret = power_ctrl(sd, 0);
765 if (ret)
766 dev_err(&client->dev, "vprog failed.\n");
767
768 return ret;
769}
770
771static int ov2722_s_power(struct v4l2_subdev *sd, int on)
772{
773 int ret;
774
775 if (on == 0)
776 return power_down(sd);
777
778 ret = power_up(sd);
779 if (!ret)
780 return ov2722_init(sd);
781
782 return ret;
783}
784
785
786
787
788
789
790
791
792
793
794
795#define LARGEST_ALLOWED_RATIO_MISMATCH 800
796static int distance(struct ov2722_resolution *res, u32 w, u32 h)
797{
798 unsigned int w_ratio = (res->width << 13) / w;
799 unsigned int h_ratio;
800 int match;
801
802 if (h == 0)
803 return -1;
804 h_ratio = (res->height << 13) / h;
805 if (h_ratio == 0)
806 return -1;
807 match = abs(((w_ratio << 13) / h_ratio) - 8192);
808
809 if ((w_ratio < 8192) || (h_ratio < 8192) ||
810 (match > LARGEST_ALLOWED_RATIO_MISMATCH))
811 return -1;
812
813 return w_ratio + h_ratio;
814}
815
816
817static int nearest_resolution_index(int w, int h)
818{
819 int i;
820 int idx = -1;
821 int dist;
822 int min_dist = INT_MAX;
823 struct ov2722_resolution *tmp_res = NULL;
824
825 for (i = 0; i < N_RES; i++) {
826 tmp_res = &ov2722_res[i];
827 dist = distance(tmp_res, w, h);
828 if (dist == -1)
829 continue;
830 if (dist < min_dist) {
831 min_dist = dist;
832 idx = i;
833 }
834 }
835
836 return idx;
837}
838
839static int get_resolution_index(int w, int h)
840{
841 int i;
842
843 for (i = 0; i < N_RES; i++) {
844 if (w != ov2722_res[i].width)
845 continue;
846 if (h != ov2722_res[i].height)
847 continue;
848
849 return i;
850 }
851
852 return -1;
853}
854
855
856static int startup(struct v4l2_subdev *sd)
857{
858 struct ov2722_device *dev = to_ov2722_sensor(sd);
859 struct i2c_client *client = v4l2_get_subdevdata(sd);
860 int ret = 0;
861
862 ret = ov2722_write_reg(client, OV2722_8BIT,
863 OV2722_SW_RESET, 0x01);
864 if (ret) {
865 dev_err(&client->dev, "ov2722 reset err.\n");
866 return ret;
867 }
868
869 ret = ov2722_write_reg_array(client, ov2722_res[dev->fmt_idx].regs);
870 if (ret) {
871 dev_err(&client->dev, "ov2722 write register err.\n");
872 return ret;
873 }
874
875 return ret;
876}
877
878static int ov2722_set_fmt(struct v4l2_subdev *sd,
879 struct v4l2_subdev_state *sd_state,
880 struct v4l2_subdev_format *format)
881{
882 struct v4l2_mbus_framefmt *fmt = &format->format;
883 struct ov2722_device *dev = to_ov2722_sensor(sd);
884 struct i2c_client *client = v4l2_get_subdevdata(sd);
885 struct camera_mipi_info *ov2722_info = NULL;
886 int ret = 0;
887 int idx;
888
889 if (format->pad)
890 return -EINVAL;
891 if (!fmt)
892 return -EINVAL;
893 ov2722_info = v4l2_get_subdev_hostdata(sd);
894 if (!ov2722_info)
895 return -EINVAL;
896
897 mutex_lock(&dev->input_lock);
898 idx = nearest_resolution_index(fmt->width, fmt->height);
899 if (idx == -1) {
900
901 fmt->width = ov2722_res[N_RES - 1].width;
902 fmt->height = ov2722_res[N_RES - 1].height;
903 } else {
904 fmt->width = ov2722_res[idx].width;
905 fmt->height = ov2722_res[idx].height;
906 }
907 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
908 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
909 sd_state->pads->try_fmt = *fmt;
910 mutex_unlock(&dev->input_lock);
911 return 0;
912 }
913
914 dev->fmt_idx = get_resolution_index(fmt->width, fmt->height);
915 if (dev->fmt_idx == -1) {
916 dev_err(&client->dev, "get resolution fail\n");
917 mutex_unlock(&dev->input_lock);
918 return -EINVAL;
919 }
920
921 dev->pixels_per_line = ov2722_res[dev->fmt_idx].pixels_per_line;
922 dev->lines_per_frame = ov2722_res[dev->fmt_idx].lines_per_frame;
923
924 ret = startup(sd);
925 if (ret) {
926 int i = 0;
927
928 dev_err(&client->dev, "ov2722 startup err, retry to power up\n");
929 for (i = 0; i < OV2722_POWER_UP_RETRY_NUM; i++) {
930 dev_err(&client->dev,
931 "ov2722 retry to power up %d/%d times, result: ",
932 i + 1, OV2722_POWER_UP_RETRY_NUM);
933 power_down(sd);
934 ret = power_up(sd);
935 if (ret) {
936 dev_err(&client->dev, "power up failed, continue\n");
937 continue;
938 }
939 ret = startup(sd);
940 if (ret) {
941 dev_err(&client->dev, " startup FAILED!\n");
942 } else {
943 dev_err(&client->dev, " startup SUCCESS!\n");
944 break;
945 }
946 }
947 if (ret) {
948 dev_err(&client->dev, "ov2722 startup err\n");
949 goto err;
950 }
951 }
952
953 ret = ov2722_get_intg_factor(client, ov2722_info,
954 &ov2722_res[dev->fmt_idx]);
955 if (ret)
956 dev_err(&client->dev, "failed to get integration_factor\n");
957
958err:
959 mutex_unlock(&dev->input_lock);
960 return ret;
961}
962
963static int ov2722_get_fmt(struct v4l2_subdev *sd,
964 struct v4l2_subdev_state *sd_state,
965 struct v4l2_subdev_format *format)
966{
967 struct v4l2_mbus_framefmt *fmt = &format->format;
968 struct ov2722_device *dev = to_ov2722_sensor(sd);
969
970 if (format->pad)
971 return -EINVAL;
972 if (!fmt)
973 return -EINVAL;
974
975 fmt->width = ov2722_res[dev->fmt_idx].width;
976 fmt->height = ov2722_res[dev->fmt_idx].height;
977 fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
978
979 return 0;
980}
981
982static int ov2722_detect(struct i2c_client *client)
983{
984 struct i2c_adapter *adapter = client->adapter;
985 u16 high, low;
986 int ret;
987 u16 id;
988 u8 revision;
989
990 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
991 return -ENODEV;
992
993 ret = ov2722_read_reg(client, OV2722_8BIT,
994 OV2722_SC_CMMN_CHIP_ID_H, &high);
995 if (ret) {
996 dev_err(&client->dev, "sensor_id_high = 0x%x\n", high);
997 return -ENODEV;
998 }
999 ret = ov2722_read_reg(client, OV2722_8BIT,
1000 OV2722_SC_CMMN_CHIP_ID_L, &low);
1001 id = (high << 8) | low;
1002
1003 if ((id != OV2722_ID) && (id != OV2720_ID)) {
1004 dev_err(&client->dev, "sensor ID error\n");
1005 return -ENODEV;
1006 }
1007
1008 ret = ov2722_read_reg(client, OV2722_8BIT,
1009 OV2722_SC_CMMN_SUB_ID, &high);
1010 revision = (u8)high & 0x0f;
1011
1012 dev_dbg(&client->dev, "sensor_revision = 0x%x\n", revision);
1013 dev_dbg(&client->dev, "detect ov2722 success\n");
1014 return 0;
1015}
1016
1017static int ov2722_s_stream(struct v4l2_subdev *sd, int enable)
1018{
1019 struct ov2722_device *dev = to_ov2722_sensor(sd);
1020 struct i2c_client *client = v4l2_get_subdevdata(sd);
1021 int ret;
1022
1023 mutex_lock(&dev->input_lock);
1024
1025 ret = ov2722_write_reg(client, OV2722_8BIT, OV2722_SW_STREAM,
1026 enable ? OV2722_START_STREAMING :
1027 OV2722_STOP_STREAMING);
1028
1029 mutex_unlock(&dev->input_lock);
1030 return ret;
1031}
1032
1033static int ov2722_s_config(struct v4l2_subdev *sd,
1034 int irq, void *platform_data)
1035{
1036 struct ov2722_device *dev = to_ov2722_sensor(sd);
1037 struct i2c_client *client = v4l2_get_subdevdata(sd);
1038 int ret = 0;
1039
1040 if (!platform_data)
1041 return -ENODEV;
1042
1043 dev->platform_data =
1044 (struct camera_sensor_platform_data *)platform_data;
1045
1046 mutex_lock(&dev->input_lock);
1047
1048
1049
1050
1051
1052 ret = power_down(sd);
1053 if (ret) {
1054 dev_err(&client->dev, "ov2722 power-off err.\n");
1055 goto fail_power_off;
1056 }
1057
1058 ret = power_up(sd);
1059 if (ret) {
1060 dev_err(&client->dev, "ov2722 power-up err.\n");
1061 goto fail_power_on;
1062 }
1063
1064 ret = dev->platform_data->csi_cfg(sd, 1);
1065 if (ret)
1066 goto fail_csi_cfg;
1067
1068
1069 ret = ov2722_detect(client);
1070 if (ret) {
1071 dev_err(&client->dev, "ov2722_detect err s_config.\n");
1072 goto fail_csi_cfg;
1073 }
1074
1075
1076 ret = power_down(sd);
1077 if (ret) {
1078 dev_err(&client->dev, "ov2722 power-off err.\n");
1079 goto fail_csi_cfg;
1080 }
1081 mutex_unlock(&dev->input_lock);
1082
1083 return 0;
1084
1085fail_csi_cfg:
1086 dev->platform_data->csi_cfg(sd, 0);
1087fail_power_on:
1088 power_down(sd);
1089 dev_err(&client->dev, "sensor power-gating failed\n");
1090fail_power_off:
1091 mutex_unlock(&dev->input_lock);
1092 return ret;
1093}
1094
1095static int ov2722_g_frame_interval(struct v4l2_subdev *sd,
1096 struct v4l2_subdev_frame_interval *interval)
1097{
1098 struct ov2722_device *dev = to_ov2722_sensor(sd);
1099
1100 interval->interval.numerator = 1;
1101 interval->interval.denominator = ov2722_res[dev->fmt_idx].fps;
1102
1103 return 0;
1104}
1105
1106static int ov2722_enum_mbus_code(struct v4l2_subdev *sd,
1107 struct v4l2_subdev_state *sd_state,
1108 struct v4l2_subdev_mbus_code_enum *code)
1109{
1110 if (code->index >= MAX_FMTS)
1111 return -EINVAL;
1112
1113 code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
1114 return 0;
1115}
1116
1117static int ov2722_enum_frame_size(struct v4l2_subdev *sd,
1118 struct v4l2_subdev_state *sd_state,
1119 struct v4l2_subdev_frame_size_enum *fse)
1120{
1121 int index = fse->index;
1122
1123 if (index >= N_RES)
1124 return -EINVAL;
1125
1126 fse->min_width = ov2722_res[index].width;
1127 fse->min_height = ov2722_res[index].height;
1128 fse->max_width = ov2722_res[index].width;
1129 fse->max_height = ov2722_res[index].height;
1130
1131 return 0;
1132}
1133
1134static int ov2722_g_skip_frames(struct v4l2_subdev *sd, u32 *frames)
1135{
1136 struct ov2722_device *dev = to_ov2722_sensor(sd);
1137
1138 mutex_lock(&dev->input_lock);
1139 *frames = ov2722_res[dev->fmt_idx].skip_frames;
1140 mutex_unlock(&dev->input_lock);
1141
1142 return 0;
1143}
1144
1145static const struct v4l2_subdev_sensor_ops ov2722_sensor_ops = {
1146 .g_skip_frames = ov2722_g_skip_frames,
1147};
1148
1149static const struct v4l2_subdev_video_ops ov2722_video_ops = {
1150 .s_stream = ov2722_s_stream,
1151 .g_frame_interval = ov2722_g_frame_interval,
1152};
1153
1154static const struct v4l2_subdev_core_ops ov2722_core_ops = {
1155 .s_power = ov2722_s_power,
1156 .ioctl = ov2722_ioctl,
1157};
1158
1159static const struct v4l2_subdev_pad_ops ov2722_pad_ops = {
1160 .enum_mbus_code = ov2722_enum_mbus_code,
1161 .enum_frame_size = ov2722_enum_frame_size,
1162 .get_fmt = ov2722_get_fmt,
1163 .set_fmt = ov2722_set_fmt,
1164};
1165
1166static const struct v4l2_subdev_ops ov2722_ops = {
1167 .core = &ov2722_core_ops,
1168 .video = &ov2722_video_ops,
1169 .pad = &ov2722_pad_ops,
1170 .sensor = &ov2722_sensor_ops,
1171};
1172
1173static int ov2722_remove(struct i2c_client *client)
1174{
1175 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1176 struct ov2722_device *dev = to_ov2722_sensor(sd);
1177
1178 dev->platform_data->csi_cfg(sd, 0);
1179 v4l2_ctrl_handler_free(&dev->ctrl_handler);
1180 v4l2_device_unregister_subdev(sd);
1181
1182 atomisp_gmin_remove_subdev(sd);
1183
1184 media_entity_cleanup(&dev->sd.entity);
1185 kfree(dev);
1186
1187 return 0;
1188}
1189
1190static int __ov2722_init_ctrl_handler(struct ov2722_device *dev)
1191{
1192 struct v4l2_ctrl_handler *hdl;
1193 unsigned int i;
1194
1195 hdl = &dev->ctrl_handler;
1196 v4l2_ctrl_handler_init(&dev->ctrl_handler, ARRAY_SIZE(ov2722_controls));
1197 for (i = 0; i < ARRAY_SIZE(ov2722_controls); i++)
1198 v4l2_ctrl_new_custom(&dev->ctrl_handler, &ov2722_controls[i],
1199 NULL);
1200
1201 dev->link_freq = v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_LINK_FREQ);
1202
1203 if (dev->ctrl_handler.error || !dev->link_freq)
1204 return dev->ctrl_handler.error;
1205
1206 dev->sd.ctrl_handler = hdl;
1207
1208 return 0;
1209}
1210
1211static int ov2722_probe(struct i2c_client *client)
1212{
1213 struct ov2722_device *dev;
1214 void *ovpdev;
1215 int ret;
1216
1217 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1218 if (!dev)
1219 return -ENOMEM;
1220
1221 mutex_init(&dev->input_lock);
1222
1223 dev->fmt_idx = 0;
1224 v4l2_i2c_subdev_init(&dev->sd, client, &ov2722_ops);
1225
1226 ovpdev = gmin_camera_platform_data(&dev->sd,
1227 ATOMISP_INPUT_FORMAT_RAW_10,
1228 atomisp_bayer_order_grbg);
1229
1230 ret = ov2722_s_config(&dev->sd, client->irq, ovpdev);
1231 if (ret)
1232 goto out_free;
1233
1234 ret = __ov2722_init_ctrl_handler(dev);
1235 if (ret)
1236 goto out_ctrl_handler_free;
1237
1238 dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1239 dev->pad.flags = MEDIA_PAD_FL_SOURCE;
1240 dev->format.code = MEDIA_BUS_FMT_SBGGR10_1X10;
1241 dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1242
1243 ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad);
1244 if (ret)
1245 ov2722_remove(client);
1246
1247 return atomisp_register_i2c_module(&dev->sd, ovpdev, RAW_CAMERA);
1248
1249out_ctrl_handler_free:
1250 v4l2_ctrl_handler_free(&dev->ctrl_handler);
1251
1252out_free:
1253 v4l2_device_unregister_subdev(&dev->sd);
1254 kfree(dev);
1255 return ret;
1256}
1257
1258static const struct acpi_device_id ov2722_acpi_match[] = {
1259 { "INT33FB" },
1260 {},
1261};
1262MODULE_DEVICE_TABLE(acpi, ov2722_acpi_match);
1263
1264static struct i2c_driver ov2722_driver = {
1265 .driver = {
1266 .name = "ov2722",
1267 .acpi_match_table = ov2722_acpi_match,
1268 },
1269 .probe_new = ov2722_probe,
1270 .remove = ov2722_remove,
1271};
1272module_i2c_driver(ov2722_driver);
1273
1274MODULE_AUTHOR("Wei Liu <wei.liu@intel.com>");
1275MODULE_DESCRIPTION("A low-level driver for OmniVision 2722 sensors");
1276MODULE_LICENSE("GPL");
1277
