1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * imx214.c - imx214 sensor driver
4 *
5 * Copyright 2018 Qtechnology A/S
6 *
7 * Ricardo Ribalda <ricardo.ribalda@gmail.com>
8 */
9 #include <linux/clk.h>
10 #include <linux/delay.h>
11 #include <linux/gpio/consumer.h>
12 #include <linux/i2c.h>
13 #include <linux/module.h>
14 #include <linux/pm_runtime.h>
15 #include <linux/regmap.h>
16 #include <linux/regulator/consumer.h>
17 #include <media/media-entity.h>
18 #include <media/v4l2-ctrls.h>
19 #include <media/v4l2-fwnode.h>
20 #include <media/v4l2-subdev.h>
21
22 #define IMX214_DEFAULT_CLK_FREQ 24000000
23 #define IMX214_DEFAULT_LINK_FREQ 480000000
24 #define IMX214_DEFAULT_PIXEL_RATE ((IMX214_DEFAULT_LINK_FREQ * 8LL) / 10)
25 #define IMX214_FPS 30
26 #define IMX214_MBUS_CODE MEDIA_BUS_FMT_SRGGB10_1X10
27
28 static const char * const imx214_supply_name[] = {
29 "vdda",
30 "vddd",
31 "vdddo",
32 };
33
34 #define IMX214_NUM_SUPPLIES ARRAY_SIZE(imx214_supply_name)
35
36 struct imx214 {
37 struct device *dev;
38 struct clk *xclk;
39 struct regmap *regmap;
40
41 struct v4l2_subdev sd;
42 struct media_pad pad;
43 struct v4l2_mbus_framefmt fmt;
44 struct v4l2_rect crop;
45
46 struct v4l2_ctrl_handler ctrls;
47 struct v4l2_ctrl *pixel_rate;
48 struct v4l2_ctrl *link_freq;
49 struct v4l2_ctrl *exposure;
50
51 struct regulator_bulk_data supplies[IMX214_NUM_SUPPLIES];
52
53 struct gpio_desc *enable_gpio;
54
55 /*
56 * Serialize control access, get/set format, get selection
57 * and start streaming.
58 */
59 struct mutex mutex;
60
61 bool streaming;
62 };
63
64 struct reg_8 {
65 u16 addr;
66 u8 val;
67 };
68
69 enum {
70 IMX214_TABLE_WAIT_MS = 0,
71 IMX214_TABLE_END,
72 IMX214_MAX_RETRIES,
73 IMX214_WAIT_MS
74 };
75
76 /*From imx214_mode_tbls.h*/
77 static const struct reg_8 mode_4096x2304[] = {
78 {0x0114, 0x03},
79 {0x0220, 0x00},
80 {0x0221, 0x11},
81 {0x0222, 0x01},
82 {0x0340, 0x0C},
83 {0x0341, 0x7A},
84 {0x0342, 0x13},
85 {0x0343, 0x90},
86 {0x0344, 0x00},
87 {0x0345, 0x38},
88 {0x0346, 0x01},
89 {0x0347, 0x98},
90 {0x0348, 0x10},
91 {0x0349, 0x37},
92 {0x034A, 0x0A},
93 {0x034B, 0x97},
94 {0x0381, 0x01},
95 {0x0383, 0x01},
96 {0x0385, 0x01},
97 {0x0387, 0x01},
98 {0x0900, 0x00},
99 {0x0901, 0x00},
100 {0x0902, 0x00},
101 {0x3000, 0x35},
102 {0x3054, 0x01},
103 {0x305C, 0x11},
104
105 {0x0112, 0x0A},
106 {0x0113, 0x0A},
107 {0x034C, 0x10},
108 {0x034D, 0x00},
109 {0x034E, 0x09},
110 {0x034F, 0x00},
111 {0x0401, 0x00},
112 {0x0404, 0x00},
113 {0x0405, 0x10},
114 {0x0408, 0x00},
115 {0x0409, 0x00},
116 {0x040A, 0x00},
117 {0x040B, 0x00},
118 {0x040C, 0x10},
119 {0x040D, 0x00},
120 {0x040E, 0x09},
121 {0x040F, 0x00},
122
123 {0x0301, 0x05},
124 {0x0303, 0x02},
125 {0x0305, 0x03},
126 {0x0306, 0x00},
127 {0x0307, 0x96},
128 {0x0309, 0x0A},
129 {0x030B, 0x01},
130 {0x0310, 0x00},
131
132 {0x0820, 0x12},
133 {0x0821, 0xC0},
134 {0x0822, 0x00},
135 {0x0823, 0x00},
136
137 {0x3A03, 0x09},
138 {0x3A04, 0x50},
139 {0x3A05, 0x01},
140
141 {0x0B06, 0x01},
142 {0x30A2, 0x00},
143
144 {0x30B4, 0x00},
145
146 {0x3A02, 0xFF},
147
148 {0x3011, 0x00},
149 {0x3013, 0x01},
150
151 {0x0202, 0x0C},
152 {0x0203, 0x70},
153 {0x0224, 0x01},
154 {0x0225, 0xF4},
155
156 {0x0204, 0x00},
157 {0x0205, 0x00},
158 {0x020E, 0x01},
159 {0x020F, 0x00},
160 {0x0210, 0x01},
161 {0x0211, 0x00},
162 {0x0212, 0x01},
163 {0x0213, 0x00},
164 {0x0214, 0x01},
165 {0x0215, 0x00},
166 {0x0216, 0x00},
167 {0x0217, 0x00},
168
169 {0x4170, 0x00},
170 {0x4171, 0x10},
171 {0x4176, 0x00},
172 {0x4177, 0x3C},
173 {0xAE20, 0x04},
174 {0xAE21, 0x5C},
175
176 {IMX214_TABLE_WAIT_MS, 10},
177 {0x0138, 0x01},
178 {IMX214_TABLE_END, 0x00}
179 };
180
181 static const struct reg_8 mode_1920x1080[] = {
182 {0x0114, 0x03},
183 {0x0220, 0x00},
184 {0x0221, 0x11},
185 {0x0222, 0x01},
186 {0x0340, 0x0C},
187 {0x0341, 0x7A},
188 {0x0342, 0x13},
189 {0x0343, 0x90},
190 {0x0344, 0x04},
191 {0x0345, 0x78},
192 {0x0346, 0x03},
193 {0x0347, 0xFC},
194 {0x0348, 0x0B},
195 {0x0349, 0xF7},
196 {0x034A, 0x08},
197 {0x034B, 0x33},
198 {0x0381, 0x01},
199 {0x0383, 0x01},
200 {0x0385, 0x01},
201 {0x0387, 0x01},
202 {0x0900, 0x00},
203 {0x0901, 0x00},
204 {0x0902, 0x00},
205 {0x3000, 0x35},
206 {0x3054, 0x01},
207 {0x305C, 0x11},
208
209 {0x0112, 0x0A},
210 {0x0113, 0x0A},
211 {0x034C, 0x07},
212 {0x034D, 0x80},
213 {0x034E, 0x04},
214 {0x034F, 0x38},
215 {0x0401, 0x00},
216 {0x0404, 0x00},
217 {0x0405, 0x10},
218 {0x0408, 0x00},
219 {0x0409, 0x00},
220 {0x040A, 0x00},
221 {0x040B, 0x00},
222 {0x040C, 0x07},
223 {0x040D, 0x80},
224 {0x040E, 0x04},
225 {0x040F, 0x38},
226
227 {0x0301, 0x05},
228 {0x0303, 0x02},
229 {0x0305, 0x03},
230 {0x0306, 0x00},
231 {0x0307, 0x96},
232 {0x0309, 0x0A},
233 {0x030B, 0x01},
234 {0x0310, 0x00},
235
236 {0x0820, 0x12},
237 {0x0821, 0xC0},
238 {0x0822, 0x00},
239 {0x0823, 0x00},
240
241 {0x3A03, 0x04},
242 {0x3A04, 0xF8},
243 {0x3A05, 0x02},
244
245 {0x0B06, 0x01},
246 {0x30A2, 0x00},
247
248 {0x30B4, 0x00},
249
250 {0x3A02, 0xFF},
251
252 {0x3011, 0x00},
253 {0x3013, 0x01},
254
255 {0x0202, 0x0C},
256 {0x0203, 0x70},
257 {0x0224, 0x01},
258 {0x0225, 0xF4},
259
260 {0x0204, 0x00},
261 {0x0205, 0x00},
262 {0x020E, 0x01},
263 {0x020F, 0x00},
264 {0x0210, 0x01},
265 {0x0211, 0x00},
266 {0x0212, 0x01},
267 {0x0213, 0x00},
268 {0x0214, 0x01},
269 {0x0215, 0x00},
270 {0x0216, 0x00},
271 {0x0217, 0x00},
272
273 {0x4170, 0x00},
274 {0x4171, 0x10},
275 {0x4176, 0x00},
276 {0x4177, 0x3C},
277 {0xAE20, 0x04},
278 {0xAE21, 0x5C},
279
280 {IMX214_TABLE_WAIT_MS, 10},
281 {0x0138, 0x01},
282 {IMX214_TABLE_END, 0x00}
283 };
284
285 static const struct reg_8 mode_table_common[] = {
286 /* software reset */
287
288 /* software standby settings */
289 {0x0100, 0x00},
290
291 /* ATR setting */
292 {0x9300, 0x02},
293
294 /* external clock setting */
295 {0x0136, 0x18},
296 {0x0137, 0x00},
297
298 /* global setting */
299 /* basic config */
300 {0x0101, 0x00},
301 {0x0105, 0x01},
302 {0x0106, 0x01},
303 {0x4550, 0x02},
304 {0x4601, 0x00},
305 {0x4642, 0x05},
306 {0x6227, 0x11},
307 {0x6276, 0x00},
308 {0x900E, 0x06},
309 {0xA802, 0x90},
310 {0xA803, 0x11},
311 {0xA804, 0x62},
312 {0xA805, 0x77},
313 {0xA806, 0xAE},
314 {0xA807, 0x34},
315 {0xA808, 0xAE},
316 {0xA809, 0x35},
317 {0xA80A, 0x62},
318 {0xA80B, 0x83},
319 {0xAE33, 0x00},
320
321 /* analog setting */
322 {0x4174, 0x00},
323 {0x4175, 0x11},
324 {0x4612, 0x29},
325 {0x461B, 0x12},
326 {0x461F, 0x06},
327 {0x4635, 0x07},
328 {0x4637, 0x30},
329 {0x463F, 0x18},
330 {0x4641, 0x0D},
331 {0x465B, 0x12},
332 {0x465F, 0x11},
333 {0x4663, 0x11},
334 {0x4667, 0x0F},
335 {0x466F, 0x0F},
336 {0x470E, 0x09},
337 {0x4909, 0xAB},
338 {0x490B, 0x95},
339 {0x4915, 0x5D},
340 {0x4A5F, 0xFF},
341 {0x4A61, 0xFF},
342 {0x4A73, 0x62},
343 {0x4A85, 0x00},
344 {0x4A87, 0xFF},
345
346 /* embedded data */
347 {0x5041, 0x04},
348 {0x583C, 0x04},
349 {0x620E, 0x04},
350 {0x6EB2, 0x01},
351 {0x6EB3, 0x00},
352 {0x9300, 0x02},
353
354 /* imagequality */
355 /* HDR setting */
356 {0x3001, 0x07},
357 {0x6D12, 0x3F},
358 {0x6D13, 0xFF},
359 {0x9344, 0x03},
360 {0x9706, 0x10},
361 {0x9707, 0x03},
362 {0x9708, 0x03},
363 {0x9E04, 0x01},
364 {0x9E05, 0x00},
365 {0x9E0C, 0x01},
366 {0x9E0D, 0x02},
367 {0x9E24, 0x00},
368 {0x9E25, 0x8C},
369 {0x9E26, 0x00},
370 {0x9E27, 0x94},
371 {0x9E28, 0x00},
372 {0x9E29, 0x96},
373
374 /* CNR parameter setting */
375 {0x69DB, 0x01},
376
377 /* Moire reduction */
378 {0x6957, 0x01},
379
380 /* image enhancement */
381 {0x6987, 0x17},
382 {0x698A, 0x03},
383 {0x698B, 0x03},
384
385 /* white balanace */
386 {0x0B8E, 0x01},
387 {0x0B8F, 0x00},
388 {0x0B90, 0x01},
389 {0x0B91, 0x00},
390 {0x0B92, 0x01},
391 {0x0B93, 0x00},
392 {0x0B94, 0x01},
393 {0x0B95, 0x00},
394
395 /* ATR setting */
396 {0x6E50, 0x00},
397 {0x6E51, 0x32},
398 {0x9340, 0x00},
399 {0x9341, 0x3C},
400 {0x9342, 0x03},
401 {0x9343, 0xFF},
402 {IMX214_TABLE_END, 0x00}
403 };
404
405 /*
406 * Declare modes in order, from biggest
407 * to smallest height.
408 */
409 static const struct imx214_mode {
410 u32 width;
411 u32 height;
412 const struct reg_8 *reg_table;
413 } imx214_modes[] = {
414 {
415 .width = 4096,
416 .height = 2304,
417 .reg_table = mode_4096x2304,
418 },
419 {
420 .width = 1920,
421 .height = 1080,
422 .reg_table = mode_1920x1080,
423 },
424 };
425
to_imx214(struct v4l2_subdev * sd)426 static inline struct imx214 *to_imx214(struct v4l2_subdev *sd)
427 {
428 return container_of(sd, struct imx214, sd);
429 }
430
imx214_power_on(struct device * dev)431 static int __maybe_unused imx214_power_on(struct device *dev)
432 {
433 struct i2c_client *client = to_i2c_client(dev);
434 struct v4l2_subdev *sd = i2c_get_clientdata(client);
435 struct imx214 *imx214 = to_imx214(sd);
436 int ret;
437
438 ret = regulator_bulk_enable(IMX214_NUM_SUPPLIES, imx214->supplies);
439 if (ret < 0) {
440 dev_err(imx214->dev, "failed to enable regulators: %d\n", ret);
441 return ret;
442 }
443
444 usleep_range(2000, 3000);
445
446 ret = clk_prepare_enable(imx214->xclk);
447 if (ret < 0) {
448 regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
449 dev_err(imx214->dev, "clk prepare enable failed\n");
450 return ret;
451 }
452
453 gpiod_set_value_cansleep(imx214->enable_gpio, 1);
454 usleep_range(12000, 15000);
455
456 return 0;
457 }
458
imx214_power_off(struct device * dev)459 static int __maybe_unused imx214_power_off(struct device *dev)
460 {
461 struct i2c_client *client = to_i2c_client(dev);
462 struct v4l2_subdev *sd = i2c_get_clientdata(client);
463 struct imx214 *imx214 = to_imx214(sd);
464
465 gpiod_set_value_cansleep(imx214->enable_gpio, 0);
466
467 clk_disable_unprepare(imx214->xclk);
468
469 regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
470 usleep_range(10, 20);
471
472 return 0;
473 }
474
imx214_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)475 static int imx214_enum_mbus_code(struct v4l2_subdev *sd,
476 struct v4l2_subdev_pad_config *cfg,
477 struct v4l2_subdev_mbus_code_enum *code)
478 {
479 if (code->index > 0)
480 return -EINVAL;
481
482 code->code = IMX214_MBUS_CODE;
483
484 return 0;
485 }
486
imx214_enum_frame_size(struct v4l2_subdev * subdev,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_frame_size_enum * fse)487 static int imx214_enum_frame_size(struct v4l2_subdev *subdev,
488 struct v4l2_subdev_pad_config *cfg,
489 struct v4l2_subdev_frame_size_enum *fse)
490 {
491 if (fse->code != IMX214_MBUS_CODE)
492 return -EINVAL;
493
494 if (fse->index >= ARRAY_SIZE(imx214_modes))
495 return -EINVAL;
496
497 fse->min_width = fse->max_width = imx214_modes[fse->index].width;
498 fse->min_height = fse->max_height = imx214_modes[fse->index].height;
499
500 return 0;
501 }
502
503 #ifdef CONFIG_VIDEO_ADV_DEBUG
imx214_s_register(struct v4l2_subdev * subdev,const struct v4l2_dbg_register * reg)504 static int imx214_s_register(struct v4l2_subdev *subdev,
505 const struct v4l2_dbg_register *reg)
506 {
507 struct imx214 *imx214 = container_of(subdev, struct imx214, sd);
508
509 return regmap_write(imx214->regmap, reg->reg, reg->val);
510 }
511
imx214_g_register(struct v4l2_subdev * subdev,struct v4l2_dbg_register * reg)512 static int imx214_g_register(struct v4l2_subdev *subdev,
513 struct v4l2_dbg_register *reg)
514 {
515 struct imx214 *imx214 = container_of(subdev, struct imx214, sd);
516 unsigned int aux;
517 int ret;
518
519 reg->size = 1;
520 ret = regmap_read(imx214->regmap, reg->reg, &aux);
521 reg->val = aux;
522
523 return ret;
524 }
525 #endif
526
527 static const struct v4l2_subdev_core_ops imx214_core_ops = {
528 #ifdef CONFIG_VIDEO_ADV_DEBUG
529 .g_register = imx214_g_register,
530 .s_register = imx214_s_register,
531 #endif
532 };
533
534 static struct v4l2_mbus_framefmt *
__imx214_get_pad_format(struct imx214 * imx214,struct v4l2_subdev_pad_config * cfg,unsigned int pad,enum v4l2_subdev_format_whence which)535 __imx214_get_pad_format(struct imx214 *imx214,
536 struct v4l2_subdev_pad_config *cfg,
537 unsigned int pad,
538 enum v4l2_subdev_format_whence which)
539 {
540 switch (which) {
541 case V4L2_SUBDEV_FORMAT_TRY:
542 return v4l2_subdev_get_try_format(&imx214->sd, cfg, pad);
543 case V4L2_SUBDEV_FORMAT_ACTIVE:
544 return &imx214->fmt;
545 default:
546 return NULL;
547 }
548 }
549
imx214_get_format(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)550 static int imx214_get_format(struct v4l2_subdev *sd,
551 struct v4l2_subdev_pad_config *cfg,
552 struct v4l2_subdev_format *format)
553 {
554 struct imx214 *imx214 = to_imx214(sd);
555
556 mutex_lock(&imx214->mutex);
557 format->format = *__imx214_get_pad_format(imx214, cfg, format->pad,
558 format->which);
559 mutex_unlock(&imx214->mutex);
560
561 return 0;
562 }
563
564 static struct v4l2_rect *
__imx214_get_pad_crop(struct imx214 * imx214,struct v4l2_subdev_pad_config * cfg,unsigned int pad,enum v4l2_subdev_format_whence which)565 __imx214_get_pad_crop(struct imx214 *imx214, struct v4l2_subdev_pad_config *cfg,
566 unsigned int pad, enum v4l2_subdev_format_whence which)
567 {
568 switch (which) {
569 case V4L2_SUBDEV_FORMAT_TRY:
570 return v4l2_subdev_get_try_crop(&imx214->sd, cfg, pad);
571 case V4L2_SUBDEV_FORMAT_ACTIVE:
572 return &imx214->crop;
573 default:
574 return NULL;
575 }
576 }
577
imx214_set_format(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)578 static int imx214_set_format(struct v4l2_subdev *sd,
579 struct v4l2_subdev_pad_config *cfg,
580 struct v4l2_subdev_format *format)
581 {
582 struct imx214 *imx214 = to_imx214(sd);
583 struct v4l2_mbus_framefmt *__format;
584 struct v4l2_rect *__crop;
585 const struct imx214_mode *mode;
586
587 mutex_lock(&imx214->mutex);
588
589 __crop = __imx214_get_pad_crop(imx214, cfg, format->pad, format->which);
590
591 mode = v4l2_find_nearest_size(imx214_modes,
592 ARRAY_SIZE(imx214_modes), width, height,
593 format->format.width,
594 format->format.height);
595
596 __crop->width = mode->width;
597 __crop->height = mode->height;
598
599 __format = __imx214_get_pad_format(imx214, cfg, format->pad,
600 format->which);
601 __format->width = __crop->width;
602 __format->height = __crop->height;
603 __format->code = IMX214_MBUS_CODE;
604 __format->field = V4L2_FIELD_NONE;
605 __format->colorspace = V4L2_COLORSPACE_SRGB;
606 __format->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(__format->colorspace);
607 __format->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
608 __format->colorspace, __format->ycbcr_enc);
609 __format->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(__format->colorspace);
610
611 format->format = *__format;
612
613 mutex_unlock(&imx214->mutex);
614
615 return 0;
616 }
617
imx214_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_selection * sel)618 static int imx214_get_selection(struct v4l2_subdev *sd,
619 struct v4l2_subdev_pad_config *cfg,
620 struct v4l2_subdev_selection *sel)
621 {
622 struct imx214 *imx214 = to_imx214(sd);
623
624 if (sel->target != V4L2_SEL_TGT_CROP)
625 return -EINVAL;
626
627 mutex_lock(&imx214->mutex);
628 sel->r = *__imx214_get_pad_crop(imx214, cfg, sel->pad,
629 sel->which);
630 mutex_unlock(&imx214->mutex);
631 return 0;
632 }
633
imx214_entity_init_cfg(struct v4l2_subdev * subdev,struct v4l2_subdev_pad_config * cfg)634 static int imx214_entity_init_cfg(struct v4l2_subdev *subdev,
635 struct v4l2_subdev_pad_config *cfg)
636 {
637 struct v4l2_subdev_format fmt = { };
638
639 fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
640 fmt.format.width = imx214_modes[0].width;
641 fmt.format.height = imx214_modes[0].height;
642
643 imx214_set_format(subdev, cfg, &fmt);
644
645 return 0;
646 }
647
imx214_set_ctrl(struct v4l2_ctrl * ctrl)648 static int imx214_set_ctrl(struct v4l2_ctrl *ctrl)
649 {
650 struct imx214 *imx214 = container_of(ctrl->handler,
651 struct imx214, ctrls);
652 u8 vals[2];
653 int ret;
654
655 /*
656 * Applying V4L2 control value only happens
657 * when power is up for streaming
658 */
659 if (!pm_runtime_get_if_in_use(imx214->dev))
660 return 0;
661
662 switch (ctrl->id) {
663 case V4L2_CID_EXPOSURE:
664 vals[1] = ctrl->val;
665 vals[0] = ctrl->val >> 8;
666 ret = regmap_bulk_write(imx214->regmap, 0x202, vals, 2);
667 if (ret < 0)
668 dev_err(imx214->dev, "Error %d\n", ret);
669 ret = 0;
670 break;
671
672 default:
673 ret = -EINVAL;
674 }
675
676 pm_runtime_put(imx214->dev);
677
678 return ret;
679 }
680
681 static const struct v4l2_ctrl_ops imx214_ctrl_ops = {
682 .s_ctrl = imx214_set_ctrl,
683 };
684
685 #define MAX_CMD 4
imx214_write_table(struct imx214 * imx214,const struct reg_8 table[])686 static int imx214_write_table(struct imx214 *imx214,
687 const struct reg_8 table[])
688 {
689 u8 vals[MAX_CMD];
690 int i;
691 int ret;
692
693 for (; table->addr != IMX214_TABLE_END ; table++) {
694 if (table->addr == IMX214_TABLE_WAIT_MS) {
695 usleep_range(table->val * 1000,
696 table->val * 1000 + 500);
697 continue;
698 }
699
700 for (i = 0; i < MAX_CMD; i++) {
701 if (table[i].addr != (table[0].addr + i))
702 break;
703 vals[i] = table[i].val;
704 }
705
706 ret = regmap_bulk_write(imx214->regmap, table->addr, vals, i);
707
708 if (ret) {
709 dev_err(imx214->dev, "write_table error: %d\n", ret);
710 return ret;
711 }
712
713 table += i - 1;
714 }
715
716 return 0;
717 }
718
imx214_start_streaming(struct imx214 * imx214)719 static int imx214_start_streaming(struct imx214 *imx214)
720 {
721 const struct imx214_mode *mode;
722 int ret;
723
724 mutex_lock(&imx214->mutex);
725 ret = imx214_write_table(imx214, mode_table_common);
726 if (ret < 0) {
727 dev_err(imx214->dev, "could not sent common table %d\n", ret);
728 goto error;
729 }
730
731 mode = v4l2_find_nearest_size(imx214_modes,
732 ARRAY_SIZE(imx214_modes), width, height,
733 imx214->fmt.width, imx214->fmt.height);
734 ret = imx214_write_table(imx214, mode->reg_table);
735 if (ret < 0) {
736 dev_err(imx214->dev, "could not sent mode table %d\n", ret);
737 goto error;
738 }
739 ret = __v4l2_ctrl_handler_setup(&imx214->ctrls);
740 if (ret < 0) {
741 dev_err(imx214->dev, "could not sync v4l2 controls\n");
742 goto error;
743 }
744 ret = regmap_write(imx214->regmap, 0x100, 1);
745 if (ret < 0) {
746 dev_err(imx214->dev, "could not sent start table %d\n", ret);
747 goto error;
748 }
749
750 mutex_unlock(&imx214->mutex);
751 return 0;
752
753 error:
754 mutex_unlock(&imx214->mutex);
755 return ret;
756 }
757
imx214_stop_streaming(struct imx214 * imx214)758 static int imx214_stop_streaming(struct imx214 *imx214)
759 {
760 int ret;
761
762 ret = regmap_write(imx214->regmap, 0x100, 0);
763 if (ret < 0)
764 dev_err(imx214->dev, "could not sent stop table %d\n", ret);
765
766 return ret;
767 }
768
imx214_s_stream(struct v4l2_subdev * subdev,int enable)769 static int imx214_s_stream(struct v4l2_subdev *subdev, int enable)
770 {
771 struct imx214 *imx214 = to_imx214(subdev);
772 int ret;
773
774 if (imx214->streaming == enable)
775 return 0;
776
777 if (enable) {
778 ret = pm_runtime_get_sync(imx214->dev);
779 if (ret < 0) {
780 pm_runtime_put_noidle(imx214->dev);
781 return ret;
782 }
783
784 ret = imx214_start_streaming(imx214);
785 if (ret < 0)
786 goto err_rpm_put;
787 } else {
788 ret = imx214_start_streaming(imx214);
789 if (ret < 0)
790 goto err_rpm_put;
791 pm_runtime_put(imx214->dev);
792 }
793
794 imx214->streaming = enable;
795 return 0;
796
797 err_rpm_put:
798 pm_runtime_put(imx214->dev);
799 return ret;
800 }
801
imx214_g_frame_interval(struct v4l2_subdev * subdev,struct v4l2_subdev_frame_interval * fival)802 static int imx214_g_frame_interval(struct v4l2_subdev *subdev,
803 struct v4l2_subdev_frame_interval *fival)
804 {
805 fival->pad = 0;
806 fival->interval.numerator = 1;
807 fival->interval.denominator = IMX214_FPS;
808
809 return 0;
810 }
811
imx214_enum_frame_interval(struct v4l2_subdev * subdev,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_frame_interval_enum * fie)812 static int imx214_enum_frame_interval(struct v4l2_subdev *subdev,
813 struct v4l2_subdev_pad_config *cfg,
814 struct v4l2_subdev_frame_interval_enum *fie)
815 {
816 const struct imx214_mode *mode;
817
818 if (fie->index != 0)
819 return -EINVAL;
820
821 mode = v4l2_find_nearest_size(imx214_modes,
822 ARRAY_SIZE(imx214_modes), width, height,
823 fie->width, fie->height);
824
825 fie->code = IMX214_MBUS_CODE;
826 fie->width = mode->width;
827 fie->height = mode->height;
828 fie->interval.numerator = 1;
829 fie->interval.denominator = IMX214_FPS;
830
831 return 0;
832 }
833
834 static const struct v4l2_subdev_video_ops imx214_video_ops = {
835 .s_stream = imx214_s_stream,
836 .g_frame_interval = imx214_g_frame_interval,
837 .s_frame_interval = imx214_g_frame_interval,
838 };
839
840 static const struct v4l2_subdev_pad_ops imx214_subdev_pad_ops = {
841 .enum_mbus_code = imx214_enum_mbus_code,
842 .enum_frame_size = imx214_enum_frame_size,
843 .enum_frame_interval = imx214_enum_frame_interval,
844 .get_fmt = imx214_get_format,
845 .set_fmt = imx214_set_format,
846 .get_selection = imx214_get_selection,
847 .init_cfg = imx214_entity_init_cfg,
848 };
849
850 static const struct v4l2_subdev_ops imx214_subdev_ops = {
851 .core = &imx214_core_ops,
852 .video = &imx214_video_ops,
853 .pad = &imx214_subdev_pad_ops,
854 };
855
856 static const struct regmap_config sensor_regmap_config = {
857 .reg_bits = 16,
858 .val_bits = 8,
859 .cache_type = REGCACHE_RBTREE,
860 };
861
imx214_get_regulators(struct device * dev,struct imx214 * imx214)862 static int imx214_get_regulators(struct device *dev, struct imx214 *imx214)
863 {
864 unsigned int i;
865
866 for (i = 0; i < IMX214_NUM_SUPPLIES; i++)
867 imx214->supplies[i].supply = imx214_supply_name[i];
868
869 return devm_regulator_bulk_get(dev, IMX214_NUM_SUPPLIES,
870 imx214->supplies);
871 }
872
imx214_parse_fwnode(struct device * dev)873 static int imx214_parse_fwnode(struct device *dev)
874 {
875 struct fwnode_handle *endpoint;
876 struct v4l2_fwnode_endpoint bus_cfg = {
877 .bus_type = V4L2_MBUS_CSI2_DPHY,
878 };
879 unsigned int i;
880 int ret;
881
882 endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
883 if (!endpoint) {
884 dev_err(dev, "endpoint node not found\n");
885 return -EINVAL;
886 }
887
888 ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
889 if (ret) {
890 dev_err(dev, "parsing endpoint node failed\n");
891 goto done;
892 }
893
894 for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
895 if (bus_cfg.link_frequencies[i] == IMX214_DEFAULT_LINK_FREQ)
896 break;
897
898 if (i == bus_cfg.nr_of_link_frequencies) {
899 dev_err(dev, "link-frequencies %d not supported, Please review your DT\n",
900 IMX214_DEFAULT_LINK_FREQ);
901 ret = -EINVAL;
902 goto done;
903 }
904
905 done:
906 v4l2_fwnode_endpoint_free(&bus_cfg);
907 fwnode_handle_put(endpoint);
908 return ret;
909 }
910
imx214_suspend(struct device * dev)911 static int __maybe_unused imx214_suspend(struct device *dev)
912 {
913 struct i2c_client *client = to_i2c_client(dev);
914 struct v4l2_subdev *sd = i2c_get_clientdata(client);
915 struct imx214 *imx214 = to_imx214(sd);
916
917 if (imx214->streaming)
918 imx214_stop_streaming(imx214);
919
920 return 0;
921 }
922
imx214_resume(struct device * dev)923 static int __maybe_unused imx214_resume(struct device *dev)
924 {
925 struct i2c_client *client = to_i2c_client(dev);
926 struct v4l2_subdev *sd = i2c_get_clientdata(client);
927 struct imx214 *imx214 = to_imx214(sd);
928 int ret;
929
930 if (imx214->streaming) {
931 ret = imx214_start_streaming(imx214);
932 if (ret)
933 goto error;
934 }
935
936 return 0;
937
938 error:
939 imx214_stop_streaming(imx214);
940 imx214->streaming = 0;
941 return ret;
942 }
943
imx214_probe(struct i2c_client * client)944 static int imx214_probe(struct i2c_client *client)
945 {
946 struct device *dev = &client->dev;
947 struct imx214 *imx214;
948 static const s64 link_freq[] = {
949 IMX214_DEFAULT_LINK_FREQ,
950 };
951 int ret;
952
953 ret = imx214_parse_fwnode(dev);
954 if (ret)
955 return ret;
956
957 imx214 = devm_kzalloc(dev, sizeof(*imx214), GFP_KERNEL);
958 if (!imx214)
959 return -ENOMEM;
960
961 imx214->dev = dev;
962
963 imx214->xclk = devm_clk_get(dev, NULL);
964 if (IS_ERR(imx214->xclk)) {
965 dev_err(dev, "could not get xclk");
966 return PTR_ERR(imx214->xclk);
967 }
968
969 ret = clk_set_rate(imx214->xclk, IMX214_DEFAULT_CLK_FREQ);
970 if (ret) {
971 dev_err(dev, "could not set xclk frequency\n");
972 return ret;
973 }
974
975 ret = imx214_get_regulators(dev, imx214);
976 if (ret < 0) {
977 dev_err(dev, "cannot get regulators\n");
978 return ret;
979 }
980
981 imx214->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
982 if (IS_ERR(imx214->enable_gpio)) {
983 dev_err(dev, "cannot get enable gpio\n");
984 return PTR_ERR(imx214->enable_gpio);
985 }
986
987 imx214->regmap = devm_regmap_init_i2c(client, &sensor_regmap_config);
988 if (IS_ERR(imx214->regmap)) {
989 dev_err(dev, "regmap init failed\n");
990 return PTR_ERR(imx214->regmap);
991 }
992
993 v4l2_i2c_subdev_init(&imx214->sd, client, &imx214_subdev_ops);
994
995 /*
996 * Enable power initially, to avoid warnings
997 * from clk_disable on power_off
998 */
999 imx214_power_on(imx214->dev);
1000
1001 pm_runtime_set_active(imx214->dev);
1002 pm_runtime_enable(imx214->dev);
1003 pm_runtime_idle(imx214->dev);
1004
1005 v4l2_ctrl_handler_init(&imx214->ctrls, 3);
1006
1007 imx214->pixel_rate = v4l2_ctrl_new_std(&imx214->ctrls, NULL,
1008 V4L2_CID_PIXEL_RATE, 0,
1009 IMX214_DEFAULT_PIXEL_RATE, 1,
1010 IMX214_DEFAULT_PIXEL_RATE);
1011 imx214->link_freq = v4l2_ctrl_new_int_menu(&imx214->ctrls, NULL,
1012 V4L2_CID_LINK_FREQ,
1013 ARRAY_SIZE(link_freq) - 1,
1014 0, link_freq);
1015 if (imx214->link_freq)
1016 imx214->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1017
1018 /*
1019 * WARNING!
1020 * Values obtained reverse engineering blobs and/or devices.
1021 * Ranges and functionality might be wrong.
1022 *
1023 * Sony, please release some register set documentation for the
1024 * device.
1025 *
1026 * Yours sincerely, Ricardo.
1027 */
1028 imx214->exposure = v4l2_ctrl_new_std(&imx214->ctrls, &imx214_ctrl_ops,
1029 V4L2_CID_EXPOSURE,
1030 0, 3184, 1, 0x0c70);
1031
1032 ret = imx214->ctrls.error;
1033 if (ret) {
1034 dev_err(&client->dev, "%s control init failed (%d)\n",
1035 __func__, ret);
1036 goto free_ctrl;
1037 }
1038
1039 imx214->sd.ctrl_handler = &imx214->ctrls;
1040 mutex_init(&imx214->mutex);
1041 imx214->ctrls.lock = &imx214->mutex;
1042
1043 imx214->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1044 imx214->pad.flags = MEDIA_PAD_FL_SOURCE;
1045 imx214->sd.dev = &client->dev;
1046 imx214->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1047
1048 ret = media_entity_pads_init(&imx214->sd.entity, 1, &imx214->pad);
1049 if (ret < 0) {
1050 dev_err(dev, "could not register media entity\n");
1051 goto free_ctrl;
1052 }
1053
1054 imx214_entity_init_cfg(&imx214->sd, NULL);
1055
1056 ret = v4l2_async_register_subdev_sensor_common(&imx214->sd);
1057 if (ret < 0) {
1058 dev_err(dev, "could not register v4l2 device\n");
1059 goto free_entity;
1060 }
1061
1062 return 0;
1063
1064 free_entity:
1065 media_entity_cleanup(&imx214->sd.entity);
1066 free_ctrl:
1067 mutex_destroy(&imx214->mutex);
1068 v4l2_ctrl_handler_free(&imx214->ctrls);
1069 pm_runtime_disable(imx214->dev);
1070
1071 return ret;
1072 }
1073
imx214_remove(struct i2c_client * client)1074 static int imx214_remove(struct i2c_client *client)
1075 {
1076 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1077 struct imx214 *imx214 = to_imx214(sd);
1078
1079 v4l2_async_unregister_subdev(&imx214->sd);
1080 media_entity_cleanup(&imx214->sd.entity);
1081 v4l2_ctrl_handler_free(&imx214->ctrls);
1082
1083 pm_runtime_disable(&client->dev);
1084 pm_runtime_set_suspended(&client->dev);
1085
1086 mutex_destroy(&imx214->mutex);
1087
1088 return 0;
1089 }
1090
1091 static const struct of_device_id imx214_of_match[] = {
1092 { .compatible = "sony,imx214" },
1093 { }
1094 };
1095 MODULE_DEVICE_TABLE(of, imx214_of_match);
1096
1097 static const struct dev_pm_ops imx214_pm_ops = {
1098 SET_SYSTEM_SLEEP_PM_OPS(imx214_suspend, imx214_resume)
1099 SET_RUNTIME_PM_OPS(imx214_power_off, imx214_power_on, NULL)
1100 };
1101
1102 static struct i2c_driver imx214_i2c_driver = {
1103 .driver = {
1104 .of_match_table = imx214_of_match,
1105 .pm = &imx214_pm_ops,
1106 .name = "imx214",
1107 },
1108 .probe_new = imx214_probe,
1109 .remove = imx214_remove,
1110 };
1111
1112 module_i2c_driver(imx214_i2c_driver);
1113
1114 MODULE_DESCRIPTION("Sony IMX214 Camera driver");
1115 MODULE_AUTHOR("Ricardo Ribalda <ricardo.ribalda@gmail.com>");
1116 MODULE_LICENSE("GPL v2");
1117
