1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2022 Intel Corporation.
3
4 #include <asm/unaligned.h>
5 #include <linux/acpi.h>
6 #include <linux/delay.h>
7 #include <linux/i2c.h>
8 #include <linux/module.h>
9 #include <linux/pm_runtime.h>
10 #include <media/v4l2-ctrls.h>
11 #include <media/v4l2-device.h>
12 #include <media/v4l2-fwnode.h>
13
14 #define OG01A1B_REG_VALUE_08BIT 1
15 #define OG01A1B_REG_VALUE_16BIT 2
16 #define OG01A1B_REG_VALUE_24BIT 3
17
18 #define OG01A1B_LINK_FREQ_500MHZ 500000000ULL
19 #define OG01A1B_SCLK 120000000LL
20 #define OG01A1B_MCLK 19200000
21 #define OG01A1B_DATA_LANES 2
22 #define OG01A1B_RGB_DEPTH 10
23
24 #define OG01A1B_REG_CHIP_ID 0x300a
25 #define OG01A1B_CHIP_ID 0x470141
26
27 #define OG01A1B_REG_MODE_SELECT 0x0100
28 #define OG01A1B_MODE_STANDBY 0x00
29 #define OG01A1B_MODE_STREAMING 0x01
30
31 /* vertical-timings from sensor */
32 #define OG01A1B_REG_VTS 0x380e
33 #define OG01A1B_VTS_120FPS 0x0498
34 #define OG01A1B_VTS_120FPS_MIN 0x0498
35 #define OG01A1B_VTS_MAX 0x7fff
36
37 /* horizontal-timings from sensor */
38 #define OG01A1B_REG_HTS 0x380c
39
40 /* Exposure controls from sensor */
41 #define OG01A1B_REG_EXPOSURE 0x3501
42 #define OG01A1B_EXPOSURE_MIN 1
43 #define OG01A1B_EXPOSURE_MAX_MARGIN 14
44 #define OG01A1B_EXPOSURE_STEP 1
45
46 /* Analog gain controls from sensor */
47 #define OG01A1B_REG_ANALOG_GAIN 0x3508
48 #define OG01A1B_ANAL_GAIN_MIN 16
49 #define OG01A1B_ANAL_GAIN_MAX 248 /* Max = 15.5x */
50 #define OG01A1B_ANAL_GAIN_STEP 1
51
52 /* Digital gain controls from sensor */
53 #define OG01A1B_REG_DIG_GAIN 0x350a
54 #define OG01A1B_DGTL_GAIN_MIN 1024
55 #define OG01A1B_DGTL_GAIN_MAX 16384 /* Max = 16x */
56 #define OG01A1B_DGTL_GAIN_STEP 1
57 #define OG01A1B_DGTL_GAIN_DEFAULT 1024
58
59 /* Group Access */
60 #define OG01A1B_REG_GROUP_ACCESS 0x3208
61 #define OG01A1B_GROUP_HOLD_START 0x0
62 #define OG01A1B_GROUP_HOLD_END 0x10
63 #define OG01A1B_GROUP_HOLD_LAUNCH 0xa0
64
65 /* Test Pattern Control */
66 #define OG01A1B_REG_TEST_PATTERN 0x5100
67 #define OG01A1B_TEST_PATTERN_ENABLE BIT(7)
68 #define OG01A1B_TEST_PATTERN_BAR_SHIFT 2
69
70 #define to_og01a1b(_sd) container_of(_sd, struct og01a1b, sd)
71
72 enum {
73 OG01A1B_LINK_FREQ_1000MBPS,
74 };
75
76 struct og01a1b_reg {
77 u16 address;
78 u8 val;
79 };
80
81 struct og01a1b_reg_list {
82 u32 num_of_regs;
83 const struct og01a1b_reg *regs;
84 };
85
86 struct og01a1b_link_freq_config {
87 const struct og01a1b_reg_list reg_list;
88 };
89
90 struct og01a1b_mode {
91 /* Frame width in pixels */
92 u32 width;
93
94 /* Frame height in pixels */
95 u32 height;
96
97 /* Horizontal timining size */
98 u32 hts;
99
100 /* Default vertical timining size */
101 u32 vts_def;
102
103 /* Min vertical timining size */
104 u32 vts_min;
105
106 /* Link frequency needed for this resolution */
107 u32 link_freq_index;
108
109 /* Sensor register settings for this resolution */
110 const struct og01a1b_reg_list reg_list;
111 };
112
113 static const struct og01a1b_reg mipi_data_rate_1000mbps[] = {
114 {0x0103, 0x01},
115 {0x0303, 0x02},
116 {0x0304, 0x00},
117 {0x0305, 0xd2},
118 {0x0323, 0x02},
119 {0x0324, 0x01},
120 {0x0325, 0x77},
121 };
122
123 static const struct og01a1b_reg mode_1280x1024_regs[] = {
124 {0x0300, 0x0a},
125 {0x0301, 0x29},
126 {0x0302, 0x31},
127 {0x0303, 0x02},
128 {0x0304, 0x00},
129 {0x0305, 0xd2},
130 {0x0306, 0x00},
131 {0x0307, 0x01},
132 {0x0308, 0x02},
133 {0x0309, 0x00},
134 {0x0310, 0x00},
135 {0x0311, 0x00},
136 {0x0312, 0x07},
137 {0x0313, 0x00},
138 {0x0314, 0x00},
139 {0x0315, 0x00},
140 {0x0320, 0x02},
141 {0x0321, 0x01},
142 {0x0322, 0x01},
143 {0x0323, 0x02},
144 {0x0324, 0x01},
145 {0x0325, 0x77},
146 {0x0326, 0xce},
147 {0x0327, 0x04},
148 {0x0329, 0x02},
149 {0x032a, 0x04},
150 {0x032b, 0x04},
151 {0x032c, 0x02},
152 {0x032d, 0x01},
153 {0x032e, 0x00},
154 {0x300d, 0x02},
155 {0x300e, 0x04},
156 {0x3021, 0x08},
157 {0x301e, 0x03},
158 {0x3103, 0x00},
159 {0x3106, 0x08},
160 {0x3107, 0x40},
161 {0x3216, 0x01},
162 {0x3217, 0x00},
163 {0x3218, 0xc0},
164 {0x3219, 0x55},
165 {0x3500, 0x00},
166 {0x3501, 0x04},
167 {0x3502, 0x8a},
168 {0x3506, 0x01},
169 {0x3507, 0x72},
170 {0x3508, 0x01},
171 {0x3509, 0x00},
172 {0x350a, 0x01},
173 {0x350b, 0x00},
174 {0x350c, 0x00},
175 {0x3541, 0x00},
176 {0x3542, 0x40},
177 {0x3605, 0xe0},
178 {0x3606, 0x41},
179 {0x3614, 0x20},
180 {0x3620, 0x0b},
181 {0x3630, 0x07},
182 {0x3636, 0xa0},
183 {0x3637, 0xf9},
184 {0x3638, 0x09},
185 {0x3639, 0x38},
186 {0x363f, 0x09},
187 {0x3640, 0x17},
188 {0x3662, 0x04},
189 {0x3665, 0x80},
190 {0x3670, 0x68},
191 {0x3674, 0x00},
192 {0x3677, 0x3f},
193 {0x3679, 0x00},
194 {0x369f, 0x19},
195 {0x36a0, 0x03},
196 {0x36a2, 0x19},
197 {0x36a3, 0x03},
198 {0x370d, 0x66},
199 {0x370f, 0x00},
200 {0x3710, 0x03},
201 {0x3715, 0x03},
202 {0x3716, 0x03},
203 {0x3717, 0x06},
204 {0x3733, 0x00},
205 {0x3778, 0x00},
206 {0x37a8, 0x0f},
207 {0x37a9, 0x01},
208 {0x37aa, 0x07},
209 {0x37bd, 0x1c},
210 {0x37c1, 0x2f},
211 {0x37c3, 0x09},
212 {0x37c8, 0x1d},
213 {0x37ca, 0x30},
214 {0x37df, 0x00},
215 {0x3800, 0x00},
216 {0x3801, 0x00},
217 {0x3802, 0x00},
218 {0x3803, 0x00},
219 {0x3804, 0x05},
220 {0x3805, 0x0f},
221 {0x3806, 0x04},
222 {0x3807, 0x0f},
223 {0x3808, 0x05},
224 {0x3809, 0x00},
225 {0x380a, 0x04},
226 {0x380b, 0x00},
227 {0x380c, 0x03},
228 {0x380d, 0x50},
229 {0x380e, 0x04},
230 {0x380f, 0x98},
231 {0x3810, 0x00},
232 {0x3811, 0x08},
233 {0x3812, 0x00},
234 {0x3813, 0x08},
235 {0x3814, 0x11},
236 {0x3815, 0x11},
237 {0x3820, 0x40},
238 {0x3821, 0x04},
239 {0x3826, 0x00},
240 {0x3827, 0x00},
241 {0x382a, 0x08},
242 {0x382b, 0x52},
243 {0x382d, 0xba},
244 {0x383d, 0x14},
245 {0x384a, 0xa2},
246 {0x3866, 0x0e},
247 {0x3867, 0x07},
248 {0x3884, 0x00},
249 {0x3885, 0x08},
250 {0x3893, 0x68},
251 {0x3894, 0x2a},
252 {0x3898, 0x00},
253 {0x3899, 0x31},
254 {0x389a, 0x04},
255 {0x389b, 0x00},
256 {0x389c, 0x0b},
257 {0x389d, 0xad},
258 {0x389f, 0x08},
259 {0x38a0, 0x00},
260 {0x38a1, 0x00},
261 {0x38a8, 0x70},
262 {0x38ac, 0xea},
263 {0x38b2, 0x00},
264 {0x38b3, 0x08},
265 {0x38bc, 0x20},
266 {0x38c4, 0x0c},
267 {0x38c5, 0x3a},
268 {0x38c7, 0x3a},
269 {0x38e1, 0xc0},
270 {0x38ec, 0x3c},
271 {0x38f0, 0x09},
272 {0x38f1, 0x6f},
273 {0x38fe, 0x3c},
274 {0x391e, 0x00},
275 {0x391f, 0x00},
276 {0x3920, 0xa5},
277 {0x3921, 0x00},
278 {0x3922, 0x00},
279 {0x3923, 0x00},
280 {0x3924, 0x05},
281 {0x3925, 0x00},
282 {0x3926, 0x00},
283 {0x3927, 0x00},
284 {0x3928, 0x1a},
285 {0x3929, 0x01},
286 {0x392a, 0xb4},
287 {0x392b, 0x00},
288 {0x392c, 0x10},
289 {0x392f, 0x40},
290 {0x4000, 0xcf},
291 {0x4003, 0x40},
292 {0x4008, 0x00},
293 {0x4009, 0x07},
294 {0x400a, 0x02},
295 {0x400b, 0x54},
296 {0x400c, 0x00},
297 {0x400d, 0x07},
298 {0x4010, 0xc0},
299 {0x4012, 0x02},
300 {0x4014, 0x04},
301 {0x4015, 0x04},
302 {0x4017, 0x02},
303 {0x4042, 0x01},
304 {0x4306, 0x04},
305 {0x4307, 0x12},
306 {0x4509, 0x00},
307 {0x450b, 0x83},
308 {0x4604, 0x68},
309 {0x4608, 0x0a},
310 {0x4700, 0x06},
311 {0x4800, 0x64},
312 {0x481b, 0x3c},
313 {0x4825, 0x32},
314 {0x4833, 0x18},
315 {0x4837, 0x0f},
316 {0x4850, 0x40},
317 {0x4860, 0x00},
318 {0x4861, 0xec},
319 {0x4864, 0x00},
320 {0x4883, 0x00},
321 {0x4888, 0x90},
322 {0x4889, 0x05},
323 {0x488b, 0x04},
324 {0x4f00, 0x04},
325 {0x4f10, 0x04},
326 {0x4f21, 0x01},
327 {0x4f22, 0x40},
328 {0x4f23, 0x44},
329 {0x4f24, 0x51},
330 {0x4f25, 0x41},
331 {0x5000, 0x1f},
332 {0x500a, 0x00},
333 {0x5100, 0x00},
334 {0x5111, 0x20},
335 {0x3020, 0x20},
336 {0x3613, 0x03},
337 {0x38c9, 0x02},
338 {0x5304, 0x01},
339 {0x3620, 0x08},
340 {0x3639, 0x58},
341 {0x363a, 0x10},
342 {0x3674, 0x04},
343 {0x3780, 0xff},
344 {0x3781, 0xff},
345 {0x3782, 0x00},
346 {0x3783, 0x01},
347 {0x3798, 0xa3},
348 {0x37aa, 0x10},
349 {0x38a8, 0xf0},
350 {0x38c4, 0x09},
351 {0x38c5, 0xb0},
352 {0x38df, 0x80},
353 {0x38ff, 0x05},
354 {0x4010, 0xf1},
355 {0x4011, 0x70},
356 {0x3667, 0x80},
357 {0x4d00, 0x4a},
358 {0x4d01, 0x18},
359 {0x4d02, 0xbb},
360 {0x4d03, 0xde},
361 {0x4d04, 0x93},
362 {0x4d05, 0xff},
363 {0x4d09, 0x0a},
364 {0x37aa, 0x16},
365 {0x3606, 0x42},
366 {0x3605, 0x00},
367 {0x36a2, 0x17},
368 {0x300d, 0x0a},
369 {0x4d00, 0x4d},
370 {0x4d01, 0x95},
371 {0x3d8C, 0x70},
372 {0x3d8d, 0xE9},
373 {0x5300, 0x00},
374 {0x5301, 0x10},
375 {0x5302, 0x00},
376 {0x5303, 0xE3},
377 {0x3d88, 0x00},
378 {0x3d89, 0x10},
379 {0x3d8a, 0x00},
380 {0x3d8b, 0xE3},
381 {0x4f22, 0x00},
382 };
383
384 static const char * const og01a1b_test_pattern_menu[] = {
385 "Disabled",
386 "Standard Color Bar",
387 "Top-Bottom Darker Color Bar",
388 "Right-Left Darker Color Bar",
389 "Bottom-Top Darker Color Bar"
390 };
391
392 static const s64 link_freq_menu_items[] = {
393 OG01A1B_LINK_FREQ_500MHZ,
394 };
395
396 static const struct og01a1b_link_freq_config link_freq_configs[] = {
397 [OG01A1B_LINK_FREQ_1000MBPS] = {
398 .reg_list = {
399 .num_of_regs = ARRAY_SIZE(mipi_data_rate_1000mbps),
400 .regs = mipi_data_rate_1000mbps,
401 }
402 }
403 };
404
405 static const struct og01a1b_mode supported_modes[] = {
406 {
407 .width = 1280,
408 .height = 1024,
409 .hts = 848,
410 .vts_def = OG01A1B_VTS_120FPS,
411 .vts_min = OG01A1B_VTS_120FPS_MIN,
412 .reg_list = {
413 .num_of_regs = ARRAY_SIZE(mode_1280x1024_regs),
414 .regs = mode_1280x1024_regs,
415 },
416 .link_freq_index = OG01A1B_LINK_FREQ_1000MBPS,
417 },
418 };
419
420 struct og01a1b {
421 struct v4l2_subdev sd;
422 struct media_pad pad;
423 struct v4l2_ctrl_handler ctrl_handler;
424
425 /* V4L2 Controls */
426 struct v4l2_ctrl *link_freq;
427 struct v4l2_ctrl *pixel_rate;
428 struct v4l2_ctrl *vblank;
429 struct v4l2_ctrl *hblank;
430 struct v4l2_ctrl *exposure;
431
432 /* Current mode */
433 const struct og01a1b_mode *cur_mode;
434
435 /* To serialize asynchronus callbacks */
436 struct mutex mutex;
437
438 /* Streaming on/off */
439 bool streaming;
440 };
441
to_pixel_rate(u32 f_index)442 static u64 to_pixel_rate(u32 f_index)
443 {
444 u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OG01A1B_DATA_LANES;
445
446 do_div(pixel_rate, OG01A1B_RGB_DEPTH);
447
448 return pixel_rate;
449 }
450
to_pixels_per_line(u32 hts,u32 f_index)451 static u64 to_pixels_per_line(u32 hts, u32 f_index)
452 {
453 u64 ppl = hts * to_pixel_rate(f_index);
454
455 do_div(ppl, OG01A1B_SCLK);
456
457 return ppl;
458 }
459
og01a1b_read_reg(struct og01a1b * og01a1b,u16 reg,u16 len,u32 * val)460 static int og01a1b_read_reg(struct og01a1b *og01a1b, u16 reg, u16 len, u32 *val)
461 {
462 struct i2c_client *client = v4l2_get_subdevdata(&og01a1b->sd);
463 struct i2c_msg msgs[2];
464 u8 addr_buf[2];
465 u8 data_buf[4] = {0};
466 int ret;
467
468 if (len > 4)
469 return -EINVAL;
470
471 put_unaligned_be16(reg, addr_buf);
472 msgs[0].addr = client->addr;
473 msgs[0].flags = 0;
474 msgs[0].len = sizeof(addr_buf);
475 msgs[0].buf = addr_buf;
476 msgs[1].addr = client->addr;
477 msgs[1].flags = I2C_M_RD;
478 msgs[1].len = len;
479 msgs[1].buf = &data_buf[4 - len];
480
481 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
482 if (ret != ARRAY_SIZE(msgs))
483 return -EIO;
484
485 *val = get_unaligned_be32(data_buf);
486
487 return 0;
488 }
489
og01a1b_write_reg(struct og01a1b * og01a1b,u16 reg,u16 len,u32 val)490 static int og01a1b_write_reg(struct og01a1b *og01a1b, u16 reg, u16 len, u32 val)
491 {
492 struct i2c_client *client = v4l2_get_subdevdata(&og01a1b->sd);
493 u8 buf[6];
494
495 if (len > 4)
496 return -EINVAL;
497
498 put_unaligned_be16(reg, buf);
499 put_unaligned_be32(val << 8 * (4 - len), buf + 2);
500 if (i2c_master_send(client, buf, len + 2) != len + 2)
501 return -EIO;
502
503 return 0;
504 }
505
og01a1b_write_reg_list(struct og01a1b * og01a1b,const struct og01a1b_reg_list * r_list)506 static int og01a1b_write_reg_list(struct og01a1b *og01a1b,
507 const struct og01a1b_reg_list *r_list)
508 {
509 struct i2c_client *client = v4l2_get_subdevdata(&og01a1b->sd);
510 unsigned int i;
511 int ret;
512
513 for (i = 0; i < r_list->num_of_regs; i++) {
514 ret = og01a1b_write_reg(og01a1b, r_list->regs[i].address, 1,
515 r_list->regs[i].val);
516 if (ret) {
517 dev_err_ratelimited(&client->dev,
518 "failed to write reg 0x%4.4x. error = %d",
519 r_list->regs[i].address, ret);
520 return ret;
521 }
522 }
523
524 return 0;
525 }
526
og01a1b_test_pattern(struct og01a1b * og01a1b,u32 pattern)527 static int og01a1b_test_pattern(struct og01a1b *og01a1b, u32 pattern)
528 {
529 if (pattern)
530 pattern = (pattern - 1) << OG01A1B_TEST_PATTERN_BAR_SHIFT |
531 OG01A1B_TEST_PATTERN_ENABLE;
532
533 return og01a1b_write_reg(og01a1b, OG01A1B_REG_TEST_PATTERN,
534 OG01A1B_REG_VALUE_08BIT, pattern);
535 }
536
og01a1b_set_ctrl(struct v4l2_ctrl * ctrl)537 static int og01a1b_set_ctrl(struct v4l2_ctrl *ctrl)
538 {
539 struct og01a1b *og01a1b = container_of(ctrl->handler,
540 struct og01a1b, ctrl_handler);
541 struct i2c_client *client = v4l2_get_subdevdata(&og01a1b->sd);
542 s64 exposure_max;
543 int ret = 0;
544
545 /* Propagate change of current control to all related controls */
546 if (ctrl->id == V4L2_CID_VBLANK) {
547 /* Update max exposure while meeting expected vblanking */
548 exposure_max = og01a1b->cur_mode->height + ctrl->val -
549 OG01A1B_EXPOSURE_MAX_MARGIN;
550 __v4l2_ctrl_modify_range(og01a1b->exposure,
551 og01a1b->exposure->minimum,
552 exposure_max, og01a1b->exposure->step,
553 exposure_max);
554 }
555
556 /* V4L2 controls values will be applied only when power is already up */
557 if (!pm_runtime_get_if_in_use(&client->dev))
558 return 0;
559
560 switch (ctrl->id) {
561 case V4L2_CID_ANALOGUE_GAIN:
562 ret = og01a1b_write_reg(og01a1b, OG01A1B_REG_ANALOG_GAIN,
563 OG01A1B_REG_VALUE_16BIT,
564 ctrl->val << 4);
565 break;
566
567 case V4L2_CID_DIGITAL_GAIN:
568 ret = og01a1b_write_reg(og01a1b, OG01A1B_REG_DIG_GAIN,
569 OG01A1B_REG_VALUE_24BIT,
570 ctrl->val << 6);
571 break;
572
573 case V4L2_CID_EXPOSURE:
574 ret = og01a1b_write_reg(og01a1b, OG01A1B_REG_EXPOSURE,
575 OG01A1B_REG_VALUE_16BIT, ctrl->val);
576 break;
577
578 case V4L2_CID_VBLANK:
579 ret = og01a1b_write_reg(og01a1b, OG01A1B_REG_VTS,
580 OG01A1B_REG_VALUE_16BIT,
581 og01a1b->cur_mode->height + ctrl->val);
582 break;
583
584 case V4L2_CID_TEST_PATTERN:
585 ret = og01a1b_test_pattern(og01a1b, ctrl->val);
586 break;
587
588 default:
589 ret = -EINVAL;
590 break;
591 }
592
593 pm_runtime_put(&client->dev);
594
595 return ret;
596 }
597
598 static const struct v4l2_ctrl_ops og01a1b_ctrl_ops = {
599 .s_ctrl = og01a1b_set_ctrl,
600 };
601
og01a1b_init_controls(struct og01a1b * og01a1b)602 static int og01a1b_init_controls(struct og01a1b *og01a1b)
603 {
604 struct v4l2_ctrl_handler *ctrl_hdlr;
605 s64 exposure_max, h_blank;
606 int ret;
607
608 ctrl_hdlr = &og01a1b->ctrl_handler;
609 ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8);
610 if (ret)
611 return ret;
612
613 ctrl_hdlr->lock = &og01a1b->mutex;
614 og01a1b->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr,
615 &og01a1b_ctrl_ops,
616 V4L2_CID_LINK_FREQ,
617 ARRAY_SIZE
618 (link_freq_menu_items) - 1,
619 0, link_freq_menu_items);
620 if (og01a1b->link_freq)
621 og01a1b->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
622
623 og01a1b->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &og01a1b_ctrl_ops,
624 V4L2_CID_PIXEL_RATE, 0,
625 to_pixel_rate
626 (OG01A1B_LINK_FREQ_1000MBPS),
627 1,
628 to_pixel_rate
629 (OG01A1B_LINK_FREQ_1000MBPS));
630 og01a1b->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &og01a1b_ctrl_ops,
631 V4L2_CID_VBLANK,
632 og01a1b->cur_mode->vts_min -
633 og01a1b->cur_mode->height,
634 OG01A1B_VTS_MAX -
635 og01a1b->cur_mode->height, 1,
636 og01a1b->cur_mode->vts_def -
637 og01a1b->cur_mode->height);
638 h_blank = to_pixels_per_line(og01a1b->cur_mode->hts,
639 og01a1b->cur_mode->link_freq_index) -
640 og01a1b->cur_mode->width;
641 og01a1b->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &og01a1b_ctrl_ops,
642 V4L2_CID_HBLANK, h_blank, h_blank,
643 1, h_blank);
644 if (og01a1b->hblank)
645 og01a1b->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
646
647 v4l2_ctrl_new_std(ctrl_hdlr, &og01a1b_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
648 OG01A1B_ANAL_GAIN_MIN, OG01A1B_ANAL_GAIN_MAX,
649 OG01A1B_ANAL_GAIN_STEP, OG01A1B_ANAL_GAIN_MIN);
650 v4l2_ctrl_new_std(ctrl_hdlr, &og01a1b_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
651 OG01A1B_DGTL_GAIN_MIN, OG01A1B_DGTL_GAIN_MAX,
652 OG01A1B_DGTL_GAIN_STEP, OG01A1B_DGTL_GAIN_DEFAULT);
653 exposure_max = (og01a1b->cur_mode->vts_def -
654 OG01A1B_EXPOSURE_MAX_MARGIN);
655 og01a1b->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &og01a1b_ctrl_ops,
656 V4L2_CID_EXPOSURE,
657 OG01A1B_EXPOSURE_MIN,
658 exposure_max,
659 OG01A1B_EXPOSURE_STEP,
660 exposure_max);
661 v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &og01a1b_ctrl_ops,
662 V4L2_CID_TEST_PATTERN,
663 ARRAY_SIZE(og01a1b_test_pattern_menu) - 1,
664 0, 0, og01a1b_test_pattern_menu);
665
666 if (ctrl_hdlr->error)
667 return ctrl_hdlr->error;
668
669 og01a1b->sd.ctrl_handler = ctrl_hdlr;
670
671 return 0;
672 }
673
og01a1b_update_pad_format(const struct og01a1b_mode * mode,struct v4l2_mbus_framefmt * fmt)674 static void og01a1b_update_pad_format(const struct og01a1b_mode *mode,
675 struct v4l2_mbus_framefmt *fmt)
676 {
677 fmt->width = mode->width;
678 fmt->height = mode->height;
679 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
680 fmt->field = V4L2_FIELD_NONE;
681 }
682
og01a1b_start_streaming(struct og01a1b * og01a1b)683 static int og01a1b_start_streaming(struct og01a1b *og01a1b)
684 {
685 struct i2c_client *client = v4l2_get_subdevdata(&og01a1b->sd);
686 const struct og01a1b_reg_list *reg_list;
687 int link_freq_index, ret;
688
689 link_freq_index = og01a1b->cur_mode->link_freq_index;
690 reg_list = &link_freq_configs[link_freq_index].reg_list;
691
692 ret = og01a1b_write_reg_list(og01a1b, reg_list);
693 if (ret) {
694 dev_err(&client->dev, "failed to set plls");
695 return ret;
696 }
697
698 reg_list = &og01a1b->cur_mode->reg_list;
699 ret = og01a1b_write_reg_list(og01a1b, reg_list);
700 if (ret) {
701 dev_err(&client->dev, "failed to set mode");
702 return ret;
703 }
704
705 ret = __v4l2_ctrl_handler_setup(og01a1b->sd.ctrl_handler);
706 if (ret)
707 return ret;
708
709 ret = og01a1b_write_reg(og01a1b, OG01A1B_REG_MODE_SELECT,
710 OG01A1B_REG_VALUE_08BIT,
711 OG01A1B_MODE_STREAMING);
712 if (ret) {
713 dev_err(&client->dev, "failed to set stream");
714 return ret;
715 }
716
717 return 0;
718 }
719
og01a1b_stop_streaming(struct og01a1b * og01a1b)720 static void og01a1b_stop_streaming(struct og01a1b *og01a1b)
721 {
722 struct i2c_client *client = v4l2_get_subdevdata(&og01a1b->sd);
723
724 if (og01a1b_write_reg(og01a1b, OG01A1B_REG_MODE_SELECT,
725 OG01A1B_REG_VALUE_08BIT, OG01A1B_MODE_STANDBY))
726 dev_err(&client->dev, "failed to set stream");
727 }
728
og01a1b_set_stream(struct v4l2_subdev * sd,int enable)729 static int og01a1b_set_stream(struct v4l2_subdev *sd, int enable)
730 {
731 struct og01a1b *og01a1b = to_og01a1b(sd);
732 struct i2c_client *client = v4l2_get_subdevdata(sd);
733 int ret = 0;
734
735 if (og01a1b->streaming == enable)
736 return 0;
737
738 mutex_lock(&og01a1b->mutex);
739 if (enable) {
740 ret = pm_runtime_get_sync(&client->dev);
741 if (ret < 0) {
742 pm_runtime_put_noidle(&client->dev);
743 mutex_unlock(&og01a1b->mutex);
744 return ret;
745 }
746
747 ret = og01a1b_start_streaming(og01a1b);
748 if (ret) {
749 enable = 0;
750 og01a1b_stop_streaming(og01a1b);
751 pm_runtime_put(&client->dev);
752 }
753 } else {
754 og01a1b_stop_streaming(og01a1b);
755 pm_runtime_put(&client->dev);
756 }
757
758 og01a1b->streaming = enable;
759 mutex_unlock(&og01a1b->mutex);
760
761 return ret;
762 }
763
og01a1b_suspend(struct device * dev)764 static int __maybe_unused og01a1b_suspend(struct device *dev)
765 {
766 struct i2c_client *client = to_i2c_client(dev);
767 struct v4l2_subdev *sd = i2c_get_clientdata(client);
768 struct og01a1b *og01a1b = to_og01a1b(sd);
769
770 mutex_lock(&og01a1b->mutex);
771 if (og01a1b->streaming)
772 og01a1b_stop_streaming(og01a1b);
773
774 mutex_unlock(&og01a1b->mutex);
775
776 return 0;
777 }
778
og01a1b_resume(struct device * dev)779 static int __maybe_unused og01a1b_resume(struct device *dev)
780 {
781 struct i2c_client *client = to_i2c_client(dev);
782 struct v4l2_subdev *sd = i2c_get_clientdata(client);
783 struct og01a1b *og01a1b = to_og01a1b(sd);
784 int ret;
785
786 mutex_lock(&og01a1b->mutex);
787 if (og01a1b->streaming) {
788 ret = og01a1b_start_streaming(og01a1b);
789 if (ret) {
790 og01a1b->streaming = false;
791 og01a1b_stop_streaming(og01a1b);
792 mutex_unlock(&og01a1b->mutex);
793 return ret;
794 }
795 }
796
797 mutex_unlock(&og01a1b->mutex);
798
799 return 0;
800 }
801
og01a1b_set_format(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)802 static int og01a1b_set_format(struct v4l2_subdev *sd,
803 struct v4l2_subdev_state *sd_state,
804 struct v4l2_subdev_format *fmt)
805 {
806 struct og01a1b *og01a1b = to_og01a1b(sd);
807 const struct og01a1b_mode *mode;
808 s32 vblank_def, h_blank;
809
810 mode = v4l2_find_nearest_size(supported_modes,
811 ARRAY_SIZE(supported_modes), width,
812 height, fmt->format.width,
813 fmt->format.height);
814
815 mutex_lock(&og01a1b->mutex);
816 og01a1b_update_pad_format(mode, &fmt->format);
817 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
818 *v4l2_subdev_get_try_format(sd, sd_state,
819 fmt->pad) = fmt->format;
820 } else {
821 og01a1b->cur_mode = mode;
822 __v4l2_ctrl_s_ctrl(og01a1b->link_freq, mode->link_freq_index);
823 __v4l2_ctrl_s_ctrl_int64(og01a1b->pixel_rate,
824 to_pixel_rate(mode->link_freq_index));
825
826 /* Update limits and set FPS to default */
827 vblank_def = mode->vts_def - mode->height;
828 __v4l2_ctrl_modify_range(og01a1b->vblank,
829 mode->vts_min - mode->height,
830 OG01A1B_VTS_MAX - mode->height, 1,
831 vblank_def);
832 __v4l2_ctrl_s_ctrl(og01a1b->vblank, vblank_def);
833 h_blank = to_pixels_per_line(mode->hts, mode->link_freq_index) -
834 mode->width;
835 __v4l2_ctrl_modify_range(og01a1b->hblank, h_blank, h_blank, 1,
836 h_blank);
837 }
838
839 mutex_unlock(&og01a1b->mutex);
840
841 return 0;
842 }
843
og01a1b_get_format(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)844 static int og01a1b_get_format(struct v4l2_subdev *sd,
845 struct v4l2_subdev_state *sd_state,
846 struct v4l2_subdev_format *fmt)
847 {
848 struct og01a1b *og01a1b = to_og01a1b(sd);
849
850 mutex_lock(&og01a1b->mutex);
851 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
852 fmt->format = *v4l2_subdev_get_try_format(&og01a1b->sd,
853 sd_state,
854 fmt->pad);
855 else
856 og01a1b_update_pad_format(og01a1b->cur_mode, &fmt->format);
857
858 mutex_unlock(&og01a1b->mutex);
859
860 return 0;
861 }
862
og01a1b_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)863 static int og01a1b_enum_mbus_code(struct v4l2_subdev *sd,
864 struct v4l2_subdev_state *sd_state,
865 struct v4l2_subdev_mbus_code_enum *code)
866 {
867 if (code->index > 0)
868 return -EINVAL;
869
870 code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
871
872 return 0;
873 }
874
og01a1b_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)875 static int og01a1b_enum_frame_size(struct v4l2_subdev *sd,
876 struct v4l2_subdev_state *sd_state,
877 struct v4l2_subdev_frame_size_enum *fse)
878 {
879 if (fse->index >= ARRAY_SIZE(supported_modes))
880 return -EINVAL;
881
882 if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10)
883 return -EINVAL;
884
885 fse->min_width = supported_modes[fse->index].width;
886 fse->max_width = fse->min_width;
887 fse->min_height = supported_modes[fse->index].height;
888 fse->max_height = fse->min_height;
889
890 return 0;
891 }
892
og01a1b_open(struct v4l2_subdev * sd,struct v4l2_subdev_fh * fh)893 static int og01a1b_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
894 {
895 struct og01a1b *og01a1b = to_og01a1b(sd);
896
897 mutex_lock(&og01a1b->mutex);
898 og01a1b_update_pad_format(&supported_modes[0],
899 v4l2_subdev_get_try_format(sd, fh->state, 0));
900 mutex_unlock(&og01a1b->mutex);
901
902 return 0;
903 }
904
905 static const struct v4l2_subdev_video_ops og01a1b_video_ops = {
906 .s_stream = og01a1b_set_stream,
907 };
908
909 static const struct v4l2_subdev_pad_ops og01a1b_pad_ops = {
910 .set_fmt = og01a1b_set_format,
911 .get_fmt = og01a1b_get_format,
912 .enum_mbus_code = og01a1b_enum_mbus_code,
913 .enum_frame_size = og01a1b_enum_frame_size,
914 };
915
916 static const struct v4l2_subdev_ops og01a1b_subdev_ops = {
917 .video = &og01a1b_video_ops,
918 .pad = &og01a1b_pad_ops,
919 };
920
921 static const struct media_entity_operations og01a1b_subdev_entity_ops = {
922 .link_validate = v4l2_subdev_link_validate,
923 };
924
925 static const struct v4l2_subdev_internal_ops og01a1b_internal_ops = {
926 .open = og01a1b_open,
927 };
928
og01a1b_identify_module(struct og01a1b * og01a1b)929 static int og01a1b_identify_module(struct og01a1b *og01a1b)
930 {
931 struct i2c_client *client = v4l2_get_subdevdata(&og01a1b->sd);
932 int ret;
933 u32 val;
934
935 ret = og01a1b_read_reg(og01a1b, OG01A1B_REG_CHIP_ID,
936 OG01A1B_REG_VALUE_24BIT, &val);
937 if (ret)
938 return ret;
939
940 if (val != OG01A1B_CHIP_ID) {
941 dev_err(&client->dev, "chip id mismatch: %x!=%x",
942 OG01A1B_CHIP_ID, val);
943 return -ENXIO;
944 }
945
946 return 0;
947 }
948
og01a1b_check_hwcfg(struct device * dev)949 static int og01a1b_check_hwcfg(struct device *dev)
950 {
951 struct fwnode_handle *ep;
952 struct fwnode_handle *fwnode = dev_fwnode(dev);
953 struct v4l2_fwnode_endpoint bus_cfg = {
954 .bus_type = V4L2_MBUS_CSI2_DPHY
955 };
956 u32 mclk;
957 int ret;
958 unsigned int i, j;
959
960 if (!fwnode)
961 return -ENXIO;
962
963 ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk);
964
965 if (ret) {
966 dev_err(dev, "can't get clock frequency");
967 return ret;
968 }
969
970 if (mclk != OG01A1B_MCLK) {
971 dev_err(dev, "external clock %d is not supported", mclk);
972 return -EINVAL;
973 }
974
975 ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
976 if (!ep)
977 return -ENXIO;
978
979 ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
980 fwnode_handle_put(ep);
981 if (ret)
982 return ret;
983
984 if (bus_cfg.bus.mipi_csi2.num_data_lanes != OG01A1B_DATA_LANES) {
985 dev_err(dev, "number of CSI2 data lanes %d is not supported",
986 bus_cfg.bus.mipi_csi2.num_data_lanes);
987 ret = -EINVAL;
988 goto check_hwcfg_error;
989 }
990
991 if (!bus_cfg.nr_of_link_frequencies) {
992 dev_err(dev, "no link frequencies defined");
993 ret = -EINVAL;
994 goto check_hwcfg_error;
995 }
996
997 for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
998 for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
999 if (link_freq_menu_items[i] ==
1000 bus_cfg.link_frequencies[j])
1001 break;
1002 }
1003
1004 if (j == bus_cfg.nr_of_link_frequencies) {
1005 dev_err(dev, "no link frequency %lld supported",
1006 link_freq_menu_items[i]);
1007 ret = -EINVAL;
1008 goto check_hwcfg_error;
1009 }
1010 }
1011
1012 check_hwcfg_error:
1013 v4l2_fwnode_endpoint_free(&bus_cfg);
1014
1015 return ret;
1016 }
1017
og01a1b_remove(struct i2c_client * client)1018 static void og01a1b_remove(struct i2c_client *client)
1019 {
1020 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1021 struct og01a1b *og01a1b = to_og01a1b(sd);
1022
1023 v4l2_async_unregister_subdev(sd);
1024 media_entity_cleanup(&sd->entity);
1025 v4l2_ctrl_handler_free(sd->ctrl_handler);
1026 pm_runtime_disable(&client->dev);
1027 mutex_destroy(&og01a1b->mutex);
1028 }
1029
og01a1b_probe(struct i2c_client * client)1030 static int og01a1b_probe(struct i2c_client *client)
1031 {
1032 struct og01a1b *og01a1b;
1033 int ret;
1034
1035 ret = og01a1b_check_hwcfg(&client->dev);
1036 if (ret) {
1037 dev_err(&client->dev, "failed to check HW configuration: %d",
1038 ret);
1039 return ret;
1040 }
1041
1042 og01a1b = devm_kzalloc(&client->dev, sizeof(*og01a1b), GFP_KERNEL);
1043 if (!og01a1b)
1044 return -ENOMEM;
1045
1046 v4l2_i2c_subdev_init(&og01a1b->sd, client, &og01a1b_subdev_ops);
1047 ret = og01a1b_identify_module(og01a1b);
1048 if (ret) {
1049 dev_err(&client->dev, "failed to find sensor: %d", ret);
1050 return ret;
1051 }
1052
1053 mutex_init(&og01a1b->mutex);
1054 og01a1b->cur_mode = &supported_modes[0];
1055 ret = og01a1b_init_controls(og01a1b);
1056 if (ret) {
1057 dev_err(&client->dev, "failed to init controls: %d", ret);
1058 goto probe_error_v4l2_ctrl_handler_free;
1059 }
1060
1061 og01a1b->sd.internal_ops = &og01a1b_internal_ops;
1062 og01a1b->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1063 og01a1b->sd.entity.ops = &og01a1b_subdev_entity_ops;
1064 og01a1b->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1065 og01a1b->pad.flags = MEDIA_PAD_FL_SOURCE;
1066 ret = media_entity_pads_init(&og01a1b->sd.entity, 1, &og01a1b->pad);
1067 if (ret) {
1068 dev_err(&client->dev, "failed to init entity pads: %d", ret);
1069 goto probe_error_v4l2_ctrl_handler_free;
1070 }
1071
1072 ret = v4l2_async_register_subdev_sensor(&og01a1b->sd);
1073 if (ret < 0) {
1074 dev_err(&client->dev, "failed to register V4L2 subdev: %d",
1075 ret);
1076 goto probe_error_media_entity_cleanup;
1077 }
1078
1079 /*
1080 * Device is already turned on by i2c-core with ACPI domain PM.
1081 * Enable runtime PM and turn off the device.
1082 */
1083 pm_runtime_set_active(&client->dev);
1084 pm_runtime_enable(&client->dev);
1085 pm_runtime_idle(&client->dev);
1086
1087 return 0;
1088
1089 probe_error_media_entity_cleanup:
1090 media_entity_cleanup(&og01a1b->sd.entity);
1091
1092 probe_error_v4l2_ctrl_handler_free:
1093 v4l2_ctrl_handler_free(og01a1b->sd.ctrl_handler);
1094 mutex_destroy(&og01a1b->mutex);
1095
1096 return ret;
1097 }
1098
1099 static const struct dev_pm_ops og01a1b_pm_ops = {
1100 SET_SYSTEM_SLEEP_PM_OPS(og01a1b_suspend, og01a1b_resume)
1101 };
1102
1103 #ifdef CONFIG_ACPI
1104 static const struct acpi_device_id og01a1b_acpi_ids[] = {
1105 {"OVTI01AC"},
1106 {}
1107 };
1108
1109 MODULE_DEVICE_TABLE(acpi, og01a1b_acpi_ids);
1110 #endif
1111
1112 static struct i2c_driver og01a1b_i2c_driver = {
1113 .driver = {
1114 .name = "og01a1b",
1115 .pm = &og01a1b_pm_ops,
1116 .acpi_match_table = ACPI_PTR(og01a1b_acpi_ids),
1117 },
1118 .probe = og01a1b_probe,
1119 .remove = og01a1b_remove,
1120 };
1121
1122 module_i2c_driver(og01a1b_i2c_driver);
1123
1124 MODULE_AUTHOR("Shawn Tu");
1125 MODULE_DESCRIPTION("OmniVision OG01A1B sensor driver");
1126 MODULE_LICENSE("GPL v2");
1127