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 <ribalda@kernel.org>
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 struct v4l2_ctrl *unit_size;
51
52 struct regulator_bulk_data supplies[IMX214_NUM_SUPPLIES];
53
54 struct gpio_desc *enable_gpio;
55
56 /*
57 * Serialize control access, get/set format, get selection
58 * and start streaming.
59 */
60 struct mutex mutex;
61
62 bool streaming;
63 };
64
65 struct reg_8 {
66 u16 addr;
67 u8 val;
68 };
69
70 enum {
71 IMX214_TABLE_WAIT_MS = 0,
72 IMX214_TABLE_END,
73 IMX214_MAX_RETRIES,
74 IMX214_WAIT_MS
75 };
76
77 /*From imx214_mode_tbls.h*/
78 static const struct reg_8 mode_4096x2304[] = {
79 {0x0114, 0x03},
80 {0x0220, 0x00},
81 {0x0221, 0x11},
82 {0x0222, 0x01},
83 {0x0340, 0x0C},
84 {0x0341, 0x7A},
85 {0x0342, 0x13},
86 {0x0343, 0x90},
87 {0x0344, 0x00},
88 {0x0345, 0x38},
89 {0x0346, 0x01},
90 {0x0347, 0x98},
91 {0x0348, 0x10},
92 {0x0349, 0x37},
93 {0x034A, 0x0A},
94 {0x034B, 0x97},
95 {0x0381, 0x01},
96 {0x0383, 0x01},
97 {0x0385, 0x01},
98 {0x0387, 0x01},
99 {0x0900, 0x00},
100 {0x0901, 0x00},
101 {0x0902, 0x00},
102 {0x3000, 0x35},
103 {0x3054, 0x01},
104 {0x305C, 0x11},
105
106 {0x0112, 0x0A},
107 {0x0113, 0x0A},
108 {0x034C, 0x10},
109 {0x034D, 0x00},
110 {0x034E, 0x09},
111 {0x034F, 0x00},
112 {0x0401, 0x00},
113 {0x0404, 0x00},
114 {0x0405, 0x10},
115 {0x0408, 0x00},
116 {0x0409, 0x00},
117 {0x040A, 0x00},
118 {0x040B, 0x00},
119 {0x040C, 0x10},
120 {0x040D, 0x00},
121 {0x040E, 0x09},
122 {0x040F, 0x00},
123
124 {0x0301, 0x05},
125 {0x0303, 0x02},
126 {0x0305, 0x03},
127 {0x0306, 0x00},
128 {0x0307, 0x96},
129 {0x0309, 0x0A},
130 {0x030B, 0x01},
131 {0x0310, 0x00},
132
133 {0x0820, 0x12},
134 {0x0821, 0xC0},
135 {0x0822, 0x00},
136 {0x0823, 0x00},
137
138 {0x3A03, 0x09},
139 {0x3A04, 0x50},
140 {0x3A05, 0x01},
141
142 {0x0B06, 0x01},
143 {0x30A2, 0x00},
144
145 {0x30B4, 0x00},
146
147 {0x3A02, 0xFF},
148
149 {0x3011, 0x00},
150 {0x3013, 0x01},
151
152 {0x0202, 0x0C},
153 {0x0203, 0x70},
154 {0x0224, 0x01},
155 {0x0225, 0xF4},
156
157 {0x0204, 0x00},
158 {0x0205, 0x00},
159 {0x020E, 0x01},
160 {0x020F, 0x00},
161 {0x0210, 0x01},
162 {0x0211, 0x00},
163 {0x0212, 0x01},
164 {0x0213, 0x00},
165 {0x0214, 0x01},
166 {0x0215, 0x00},
167 {0x0216, 0x00},
168 {0x0217, 0x00},
169
170 {0x4170, 0x00},
171 {0x4171, 0x10},
172 {0x4176, 0x00},
173 {0x4177, 0x3C},
174 {0xAE20, 0x04},
175 {0xAE21, 0x5C},
176
177 {IMX214_TABLE_WAIT_MS, 10},
178 {0x0138, 0x01},
179 {IMX214_TABLE_END, 0x00}
180 };
181
182 static const struct reg_8 mode_1920x1080[] = {
183 {0x0114, 0x03},
184 {0x0220, 0x00},
185 {0x0221, 0x11},
186 {0x0222, 0x01},
187 {0x0340, 0x0C},
188 {0x0341, 0x7A},
189 {0x0342, 0x13},
190 {0x0343, 0x90},
191 {0x0344, 0x04},
192 {0x0345, 0x78},
193 {0x0346, 0x03},
194 {0x0347, 0xFC},
195 {0x0348, 0x0B},
196 {0x0349, 0xF7},
197 {0x034A, 0x08},
198 {0x034B, 0x33},
199 {0x0381, 0x01},
200 {0x0383, 0x01},
201 {0x0385, 0x01},
202 {0x0387, 0x01},
203 {0x0900, 0x00},
204 {0x0901, 0x00},
205 {0x0902, 0x00},
206 {0x3000, 0x35},
207 {0x3054, 0x01},
208 {0x305C, 0x11},
209
210 {0x0112, 0x0A},
211 {0x0113, 0x0A},
212 {0x034C, 0x07},
213 {0x034D, 0x80},
214 {0x034E, 0x04},
215 {0x034F, 0x38},
216 {0x0401, 0x00},
217 {0x0404, 0x00},
218 {0x0405, 0x10},
219 {0x0408, 0x00},
220 {0x0409, 0x00},
221 {0x040A, 0x00},
222 {0x040B, 0x00},
223 {0x040C, 0x07},
224 {0x040D, 0x80},
225 {0x040E, 0x04},
226 {0x040F, 0x38},
227
228 {0x0301, 0x05},
229 {0x0303, 0x02},
230 {0x0305, 0x03},
231 {0x0306, 0x00},
232 {0x0307, 0x96},
233 {0x0309, 0x0A},
234 {0x030B, 0x01},
235 {0x0310, 0x00},
236
237 {0x0820, 0x12},
238 {0x0821, 0xC0},
239 {0x0822, 0x00},
240 {0x0823, 0x00},
241
242 {0x3A03, 0x04},
243 {0x3A04, 0xF8},
244 {0x3A05, 0x02},
245
246 {0x0B06, 0x01},
247 {0x30A2, 0x00},
248
249 {0x30B4, 0x00},
250
251 {0x3A02, 0xFF},
252
253 {0x3011, 0x00},
254 {0x3013, 0x01},
255
256 {0x0202, 0x0C},
257 {0x0203, 0x70},
258 {0x0224, 0x01},
259 {0x0225, 0xF4},
260
261 {0x0204, 0x00},
262 {0x0205, 0x00},
263 {0x020E, 0x01},
264 {0x020F, 0x00},
265 {0x0210, 0x01},
266 {0x0211, 0x00},
267 {0x0212, 0x01},
268 {0x0213, 0x00},
269 {0x0214, 0x01},
270 {0x0215, 0x00},
271 {0x0216, 0x00},
272 {0x0217, 0x00},
273
274 {0x4170, 0x00},
275 {0x4171, 0x10},
276 {0x4176, 0x00},
277 {0x4177, 0x3C},
278 {0xAE20, 0x04},
279 {0xAE21, 0x5C},
280
281 {IMX214_TABLE_WAIT_MS, 10},
282 {0x0138, 0x01},
283 {IMX214_TABLE_END, 0x00}
284 };
285
286 static const struct reg_8 mode_table_common[] = {
287 /* software reset */
288
289 /* software standby settings */
290 {0x0100, 0x00},
291
292 /* ATR setting */
293 {0x9300, 0x02},
294
295 /* external clock setting */
296 {0x0136, 0x18},
297 {0x0137, 0x00},
298
299 /* global setting */
300 /* basic config */
301 {0x0101, 0x00},
302 {0x0105, 0x01},
303 {0x0106, 0x01},
304 {0x4550, 0x02},
305 {0x4601, 0x00},
306 {0x4642, 0x05},
307 {0x6227, 0x11},
308 {0x6276, 0x00},
309 {0x900E, 0x06},
310 {0xA802, 0x90},
311 {0xA803, 0x11},
312 {0xA804, 0x62},
313 {0xA805, 0x77},
314 {0xA806, 0xAE},
315 {0xA807, 0x34},
316 {0xA808, 0xAE},
317 {0xA809, 0x35},
318 {0xA80A, 0x62},
319 {0xA80B, 0x83},
320 {0xAE33, 0x00},
321
322 /* analog setting */
323 {0x4174, 0x00},
324 {0x4175, 0x11},
325 {0x4612, 0x29},
326 {0x461B, 0x12},
327 {0x461F, 0x06},
328 {0x4635, 0x07},
329 {0x4637, 0x30},
330 {0x463F, 0x18},
331 {0x4641, 0x0D},
332 {0x465B, 0x12},
333 {0x465F, 0x11},
334 {0x4663, 0x11},
335 {0x4667, 0x0F},
336 {0x466F, 0x0F},
337 {0x470E, 0x09},
338 {0x4909, 0xAB},
339 {0x490B, 0x95},
340 {0x4915, 0x5D},
341 {0x4A5F, 0xFF},
342 {0x4A61, 0xFF},
343 {0x4A73, 0x62},
344 {0x4A85, 0x00},
345 {0x4A87, 0xFF},
346
347 /* embedded data */
348 {0x5041, 0x04},
349 {0x583C, 0x04},
350 {0x620E, 0x04},
351 {0x6EB2, 0x01},
352 {0x6EB3, 0x00},
353 {0x9300, 0x02},
354
355 /* imagequality */
356 /* HDR setting */
357 {0x3001, 0x07},
358 {0x6D12, 0x3F},
359 {0x6D13, 0xFF},
360 {0x9344, 0x03},
361 {0x9706, 0x10},
362 {0x9707, 0x03},
363 {0x9708, 0x03},
364 {0x9E04, 0x01},
365 {0x9E05, 0x00},
366 {0x9E0C, 0x01},
367 {0x9E0D, 0x02},
368 {0x9E24, 0x00},
369 {0x9E25, 0x8C},
370 {0x9E26, 0x00},
371 {0x9E27, 0x94},
372 {0x9E28, 0x00},
373 {0x9E29, 0x96},
374
375 /* CNR parameter setting */
376 {0x69DB, 0x01},
377
378 /* Moire reduction */
379 {0x6957, 0x01},
380
381 /* image enhancement */
382 {0x6987, 0x17},
383 {0x698A, 0x03},
384 {0x698B, 0x03},
385
386 /* white balanace */
387 {0x0B8E, 0x01},
388 {0x0B8F, 0x00},
389 {0x0B90, 0x01},
390 {0x0B91, 0x00},
391 {0x0B92, 0x01},
392 {0x0B93, 0x00},
393 {0x0B94, 0x01},
394 {0x0B95, 0x00},
395
396 /* ATR setting */
397 {0x6E50, 0x00},
398 {0x6E51, 0x32},
399 {0x9340, 0x00},
400 {0x9341, 0x3C},
401 {0x9342, 0x03},
402 {0x9343, 0xFF},
403 {IMX214_TABLE_END, 0x00}
404 };
405
406 /*
407 * Declare modes in order, from biggest
408 * to smallest height.
409 */
410 static const struct imx214_mode {
411 u32 width;
412 u32 height;
413 const struct reg_8 *reg_table;
414 } imx214_modes[] = {
415 {
416 .width = 4096,
417 .height = 2304,
418 .reg_table = mode_4096x2304,
419 },
420 {
421 .width = 1920,
422 .height = 1080,
423 .reg_table = mode_1920x1080,
424 },
425 };
426
to_imx214(struct v4l2_subdev * sd)427 static inline struct imx214 *to_imx214(struct v4l2_subdev *sd)
428 {
429 return container_of(sd, struct imx214, sd);
430 }
431
imx214_power_on(struct device * dev)432 static int __maybe_unused imx214_power_on(struct device *dev)
433 {
434 struct i2c_client *client = to_i2c_client(dev);
435 struct v4l2_subdev *sd = i2c_get_clientdata(client);
436 struct imx214 *imx214 = to_imx214(sd);
437 int ret;
438
439 ret = regulator_bulk_enable(IMX214_NUM_SUPPLIES, imx214->supplies);
440 if (ret < 0) {
441 dev_err(imx214->dev, "failed to enable regulators: %d\n", ret);
442 return ret;
443 }
444
445 usleep_range(2000, 3000);
446
447 ret = clk_prepare_enable(imx214->xclk);
448 if (ret < 0) {
449 regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
450 dev_err(imx214->dev, "clk prepare enable failed\n");
451 return ret;
452 }
453
454 gpiod_set_value_cansleep(imx214->enable_gpio, 1);
455 usleep_range(12000, 15000);
456
457 return 0;
458 }
459
imx214_power_off(struct device * dev)460 static int __maybe_unused imx214_power_off(struct device *dev)
461 {
462 struct i2c_client *client = to_i2c_client(dev);
463 struct v4l2_subdev *sd = i2c_get_clientdata(client);
464 struct imx214 *imx214 = to_imx214(sd);
465
466 gpiod_set_value_cansleep(imx214->enable_gpio, 0);
467
468 clk_disable_unprepare(imx214->xclk);
469
470 regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
471 usleep_range(10, 20);
472
473 return 0;
474 }
475
imx214_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)476 static int imx214_enum_mbus_code(struct v4l2_subdev *sd,
477 struct v4l2_subdev_pad_config *cfg,
478 struct v4l2_subdev_mbus_code_enum *code)
479 {
480 if (code->index > 0)
481 return -EINVAL;
482
483 code->code = IMX214_MBUS_CODE;
484
485 return 0;
486 }
487
imx214_enum_frame_size(struct v4l2_subdev * subdev,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_frame_size_enum * fse)488 static int imx214_enum_frame_size(struct v4l2_subdev *subdev,
489 struct v4l2_subdev_pad_config *cfg,
490 struct v4l2_subdev_frame_size_enum *fse)
491 {
492 if (fse->code != IMX214_MBUS_CODE)
493 return -EINVAL;
494
495 if (fse->index >= ARRAY_SIZE(imx214_modes))
496 return -EINVAL;
497
498 fse->min_width = fse->max_width = imx214_modes[fse->index].width;
499 fse->min_height = fse->max_height = imx214_modes[fse->index].height;
500
501 return 0;
502 }
503
504 #ifdef CONFIG_VIDEO_ADV_DEBUG
imx214_s_register(struct v4l2_subdev * subdev,const struct v4l2_dbg_register * reg)505 static int imx214_s_register(struct v4l2_subdev *subdev,
506 const struct v4l2_dbg_register *reg)
507 {
508 struct imx214 *imx214 = container_of(subdev, struct imx214, sd);
509
510 return regmap_write(imx214->regmap, reg->reg, reg->val);
511 }
512
imx214_g_register(struct v4l2_subdev * subdev,struct v4l2_dbg_register * reg)513 static int imx214_g_register(struct v4l2_subdev *subdev,
514 struct v4l2_dbg_register *reg)
515 {
516 struct imx214 *imx214 = container_of(subdev, struct imx214, sd);
517 unsigned int aux;
518 int ret;
519
520 reg->size = 1;
521 ret = regmap_read(imx214->regmap, reg->reg, &aux);
522 reg->val = aux;
523
524 return ret;
525 }
526 #endif
527
528 static const struct v4l2_subdev_core_ops imx214_core_ops = {
529 #ifdef CONFIG_VIDEO_ADV_DEBUG
530 .g_register = imx214_g_register,
531 .s_register = imx214_s_register,
532 #endif
533 };
534
535 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)536 __imx214_get_pad_format(struct imx214 *imx214,
537 struct v4l2_subdev_pad_config *cfg,
538 unsigned int pad,
539 enum v4l2_subdev_format_whence which)
540 {
541 switch (which) {
542 case V4L2_SUBDEV_FORMAT_TRY:
543 return v4l2_subdev_get_try_format(&imx214->sd, cfg, pad);
544 case V4L2_SUBDEV_FORMAT_ACTIVE:
545 return &imx214->fmt;
546 default:
547 return NULL;
548 }
549 }
550
imx214_get_format(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)551 static int imx214_get_format(struct v4l2_subdev *sd,
552 struct v4l2_subdev_pad_config *cfg,
553 struct v4l2_subdev_format *format)
554 {
555 struct imx214 *imx214 = to_imx214(sd);
556
557 mutex_lock(&imx214->mutex);
558 format->format = *__imx214_get_pad_format(imx214, cfg, format->pad,
559 format->which);
560 mutex_unlock(&imx214->mutex);
561
562 return 0;
563 }
564
565 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)566 __imx214_get_pad_crop(struct imx214 *imx214, struct v4l2_subdev_pad_config *cfg,
567 unsigned int pad, enum v4l2_subdev_format_whence which)
568 {
569 switch (which) {
570 case V4L2_SUBDEV_FORMAT_TRY:
571 return v4l2_subdev_get_try_crop(&imx214->sd, cfg, pad);
572 case V4L2_SUBDEV_FORMAT_ACTIVE:
573 return &imx214->crop;
574 default:
575 return NULL;
576 }
577 }
578
imx214_set_format(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)579 static int imx214_set_format(struct v4l2_subdev *sd,
580 struct v4l2_subdev_pad_config *cfg,
581 struct v4l2_subdev_format *format)
582 {
583 struct imx214 *imx214 = to_imx214(sd);
584 struct v4l2_mbus_framefmt *__format;
585 struct v4l2_rect *__crop;
586 const struct imx214_mode *mode;
587
588 mutex_lock(&imx214->mutex);
589
590 __crop = __imx214_get_pad_crop(imx214, cfg, format->pad, format->which);
591
592 mode = v4l2_find_nearest_size(imx214_modes,
593 ARRAY_SIZE(imx214_modes), width, height,
594 format->format.width,
595 format->format.height);
596
597 __crop->width = mode->width;
598 __crop->height = mode->height;
599
600 __format = __imx214_get_pad_format(imx214, cfg, format->pad,
601 format->which);
602 __format->width = __crop->width;
603 __format->height = __crop->height;
604 __format->code = IMX214_MBUS_CODE;
605 __format->field = V4L2_FIELD_NONE;
606 __format->colorspace = V4L2_COLORSPACE_SRGB;
607 __format->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(__format->colorspace);
608 __format->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
609 __format->colorspace, __format->ycbcr_enc);
610 __format->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(__format->colorspace);
611
612 format->format = *__format;
613
614 mutex_unlock(&imx214->mutex);
615
616 return 0;
617 }
618
imx214_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_selection * sel)619 static int imx214_get_selection(struct v4l2_subdev *sd,
620 struct v4l2_subdev_pad_config *cfg,
621 struct v4l2_subdev_selection *sel)
622 {
623 struct imx214 *imx214 = to_imx214(sd);
624
625 if (sel->target != V4L2_SEL_TGT_CROP)
626 return -EINVAL;
627
628 mutex_lock(&imx214->mutex);
629 sel->r = *__imx214_get_pad_crop(imx214, cfg, sel->pad,
630 sel->which);
631 mutex_unlock(&imx214->mutex);
632 return 0;
633 }
634
imx214_entity_init_cfg(struct v4l2_subdev * subdev,struct v4l2_subdev_pad_config * cfg)635 static int imx214_entity_init_cfg(struct v4l2_subdev *subdev,
636 struct v4l2_subdev_pad_config *cfg)
637 {
638 struct v4l2_subdev_format fmt = { };
639
640 fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
641 fmt.format.width = imx214_modes[0].width;
642 fmt.format.height = imx214_modes[0].height;
643
644 imx214_set_format(subdev, cfg, &fmt);
645
646 return 0;
647 }
648
imx214_set_ctrl(struct v4l2_ctrl * ctrl)649 static int imx214_set_ctrl(struct v4l2_ctrl *ctrl)
650 {
651 struct imx214 *imx214 = container_of(ctrl->handler,
652 struct imx214, ctrls);
653 u8 vals[2];
654 int ret;
655
656 /*
657 * Applying V4L2 control value only happens
658 * when power is up for streaming
659 */
660 if (!pm_runtime_get_if_in_use(imx214->dev))
661 return 0;
662
663 switch (ctrl->id) {
664 case V4L2_CID_EXPOSURE:
665 vals[1] = ctrl->val;
666 vals[0] = ctrl->val >> 8;
667 ret = regmap_bulk_write(imx214->regmap, 0x202, vals, 2);
668 if (ret < 0)
669 dev_err(imx214->dev, "Error %d\n", ret);
670 ret = 0;
671 break;
672
673 default:
674 ret = -EINVAL;
675 }
676
677 pm_runtime_put(imx214->dev);
678
679 return ret;
680 }
681
682 static const struct v4l2_ctrl_ops imx214_ctrl_ops = {
683 .s_ctrl = imx214_set_ctrl,
684 };
685
686 #define MAX_CMD 4
imx214_write_table(struct imx214 * imx214,const struct reg_8 table[])687 static int imx214_write_table(struct imx214 *imx214,
688 const struct reg_8 table[])
689 {
690 u8 vals[MAX_CMD];
691 int i;
692 int ret;
693
694 for (; table->addr != IMX214_TABLE_END ; table++) {
695 if (table->addr == IMX214_TABLE_WAIT_MS) {
696 usleep_range(table->val * 1000,
697 table->val * 1000 + 500);
698 continue;
699 }
700
701 for (i = 0; i < MAX_CMD; i++) {
702 if (table[i].addr != (table[0].addr + i))
703 break;
704 vals[i] = table[i].val;
705 }
706
707 ret = regmap_bulk_write(imx214->regmap, table->addr, vals, i);
708
709 if (ret) {
710 dev_err(imx214->dev, "write_table error: %d\n", ret);
711 return ret;
712 }
713
714 table += i - 1;
715 }
716
717 return 0;
718 }
719
imx214_start_streaming(struct imx214 * imx214)720 static int imx214_start_streaming(struct imx214 *imx214)
721 {
722 const struct imx214_mode *mode;
723 int ret;
724
725 mutex_lock(&imx214->mutex);
726 ret = imx214_write_table(imx214, mode_table_common);
727 if (ret < 0) {
728 dev_err(imx214->dev, "could not sent common table %d\n", ret);
729 goto error;
730 }
731
732 mode = v4l2_find_nearest_size(imx214_modes,
733 ARRAY_SIZE(imx214_modes), width, height,
734 imx214->fmt.width, imx214->fmt.height);
735 ret = imx214_write_table(imx214, mode->reg_table);
736 if (ret < 0) {
737 dev_err(imx214->dev, "could not sent mode table %d\n", ret);
738 goto error;
739 }
740 ret = __v4l2_ctrl_handler_setup(&imx214->ctrls);
741 if (ret < 0) {
742 dev_err(imx214->dev, "could not sync v4l2 controls\n");
743 goto error;
744 }
745 ret = regmap_write(imx214->regmap, 0x100, 1);
746 if (ret < 0) {
747 dev_err(imx214->dev, "could not sent start table %d\n", ret);
748 goto error;
749 }
750
751 mutex_unlock(&imx214->mutex);
752 return 0;
753
754 error:
755 mutex_unlock(&imx214->mutex);
756 return ret;
757 }
758
imx214_stop_streaming(struct imx214 * imx214)759 static int imx214_stop_streaming(struct imx214 *imx214)
760 {
761 int ret;
762
763 ret = regmap_write(imx214->regmap, 0x100, 0);
764 if (ret < 0)
765 dev_err(imx214->dev, "could not sent stop table %d\n", ret);
766
767 return ret;
768 }
769
imx214_s_stream(struct v4l2_subdev * subdev,int enable)770 static int imx214_s_stream(struct v4l2_subdev *subdev, int enable)
771 {
772 struct imx214 *imx214 = to_imx214(subdev);
773 int ret;
774
775 if (imx214->streaming == enable)
776 return 0;
777
778 if (enable) {
779 ret = pm_runtime_get_sync(imx214->dev);
780 if (ret < 0) {
781 pm_runtime_put_noidle(imx214->dev);
782 return ret;
783 }
784
785 ret = imx214_start_streaming(imx214);
786 if (ret < 0)
787 goto err_rpm_put;
788 } else {
789 ret = imx214_stop_streaming(imx214);
790 if (ret < 0)
791 goto err_rpm_put;
792 pm_runtime_put(imx214->dev);
793 }
794
795 imx214->streaming = enable;
796 return 0;
797
798 err_rpm_put:
799 pm_runtime_put(imx214->dev);
800 return ret;
801 }
802
imx214_g_frame_interval(struct v4l2_subdev * subdev,struct v4l2_subdev_frame_interval * fival)803 static int imx214_g_frame_interval(struct v4l2_subdev *subdev,
804 struct v4l2_subdev_frame_interval *fival)
805 {
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 static const struct v4l2_area unit_size = {
952 .width = 1120,
953 .height = 1120,
954 };
955 int ret;
956
957 ret = imx214_parse_fwnode(dev);
958 if (ret)
959 return ret;
960
961 imx214 = devm_kzalloc(dev, sizeof(*imx214), GFP_KERNEL);
962 if (!imx214)
963 return -ENOMEM;
964
965 imx214->dev = dev;
966
967 imx214->xclk = devm_clk_get(dev, NULL);
968 if (IS_ERR(imx214->xclk)) {
969 dev_err(dev, "could not get xclk");
970 return PTR_ERR(imx214->xclk);
971 }
972
973 ret = clk_set_rate(imx214->xclk, IMX214_DEFAULT_CLK_FREQ);
974 if (ret) {
975 dev_err(dev, "could not set xclk frequency\n");
976 return ret;
977 }
978
979 ret = imx214_get_regulators(dev, imx214);
980 if (ret < 0) {
981 dev_err(dev, "cannot get regulators\n");
982 return ret;
983 }
984
985 imx214->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
986 if (IS_ERR(imx214->enable_gpio)) {
987 dev_err(dev, "cannot get enable gpio\n");
988 return PTR_ERR(imx214->enable_gpio);
989 }
990
991 imx214->regmap = devm_regmap_init_i2c(client, &sensor_regmap_config);
992 if (IS_ERR(imx214->regmap)) {
993 dev_err(dev, "regmap init failed\n");
994 return PTR_ERR(imx214->regmap);
995 }
996
997 v4l2_i2c_subdev_init(&imx214->sd, client, &imx214_subdev_ops);
998
999 /*
1000 * Enable power initially, to avoid warnings
1001 * from clk_disable on power_off
1002 */
1003 imx214_power_on(imx214->dev);
1004
1005 pm_runtime_set_active(imx214->dev);
1006 pm_runtime_enable(imx214->dev);
1007 pm_runtime_idle(imx214->dev);
1008
1009 v4l2_ctrl_handler_init(&imx214->ctrls, 3);
1010
1011 imx214->pixel_rate = v4l2_ctrl_new_std(&imx214->ctrls, NULL,
1012 V4L2_CID_PIXEL_RATE, 0,
1013 IMX214_DEFAULT_PIXEL_RATE, 1,
1014 IMX214_DEFAULT_PIXEL_RATE);
1015 imx214->link_freq = v4l2_ctrl_new_int_menu(&imx214->ctrls, NULL,
1016 V4L2_CID_LINK_FREQ,
1017 ARRAY_SIZE(link_freq) - 1,
1018 0, link_freq);
1019 if (imx214->link_freq)
1020 imx214->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1021
1022 /*
1023 * WARNING!
1024 * Values obtained reverse engineering blobs and/or devices.
1025 * Ranges and functionality might be wrong.
1026 *
1027 * Sony, please release some register set documentation for the
1028 * device.
1029 *
1030 * Yours sincerely, Ricardo.
1031 */
1032 imx214->exposure = v4l2_ctrl_new_std(&imx214->ctrls, &imx214_ctrl_ops,
1033 V4L2_CID_EXPOSURE,
1034 0, 3184, 1, 0x0c70);
1035
1036 imx214->unit_size = v4l2_ctrl_new_std_compound(&imx214->ctrls,
1037 NULL,
1038 V4L2_CID_UNIT_CELL_SIZE,
1039 v4l2_ctrl_ptr_create((void *)&unit_size));
1040 ret = imx214->ctrls.error;
1041 if (ret) {
1042 dev_err(&client->dev, "%s control init failed (%d)\n",
1043 __func__, ret);
1044 goto free_ctrl;
1045 }
1046
1047 imx214->sd.ctrl_handler = &imx214->ctrls;
1048 mutex_init(&imx214->mutex);
1049 imx214->ctrls.lock = &imx214->mutex;
1050
1051 imx214->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1052 imx214->pad.flags = MEDIA_PAD_FL_SOURCE;
1053 imx214->sd.dev = &client->dev;
1054 imx214->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1055
1056 ret = media_entity_pads_init(&imx214->sd.entity, 1, &imx214->pad);
1057 if (ret < 0) {
1058 dev_err(dev, "could not register media entity\n");
1059 goto free_ctrl;
1060 }
1061
1062 imx214_entity_init_cfg(&imx214->sd, NULL);
1063
1064 ret = v4l2_async_register_subdev_sensor_common(&imx214->sd);
1065 if (ret < 0) {
1066 dev_err(dev, "could not register v4l2 device\n");
1067 goto free_entity;
1068 }
1069
1070 return 0;
1071
1072 free_entity:
1073 media_entity_cleanup(&imx214->sd.entity);
1074 free_ctrl:
1075 mutex_destroy(&imx214->mutex);
1076 v4l2_ctrl_handler_free(&imx214->ctrls);
1077 pm_runtime_disable(imx214->dev);
1078
1079 return ret;
1080 }
1081
imx214_remove(struct i2c_client * client)1082 static int imx214_remove(struct i2c_client *client)
1083 {
1084 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1085 struct imx214 *imx214 = to_imx214(sd);
1086
1087 v4l2_async_unregister_subdev(&imx214->sd);
1088 media_entity_cleanup(&imx214->sd.entity);
1089 v4l2_ctrl_handler_free(&imx214->ctrls);
1090
1091 pm_runtime_disable(&client->dev);
1092 pm_runtime_set_suspended(&client->dev);
1093
1094 mutex_destroy(&imx214->mutex);
1095
1096 return 0;
1097 }
1098
1099 static const struct of_device_id imx214_of_match[] = {
1100 { .compatible = "sony,imx214" },
1101 { }
1102 };
1103 MODULE_DEVICE_TABLE(of, imx214_of_match);
1104
1105 static const struct dev_pm_ops imx214_pm_ops = {
1106 SET_SYSTEM_SLEEP_PM_OPS(imx214_suspend, imx214_resume)
1107 SET_RUNTIME_PM_OPS(imx214_power_off, imx214_power_on, NULL)
1108 };
1109
1110 static struct i2c_driver imx214_i2c_driver = {
1111 .driver = {
1112 .of_match_table = imx214_of_match,
1113 .pm = &imx214_pm_ops,
1114 .name = "imx214",
1115 },
1116 .probe_new = imx214_probe,
1117 .remove = imx214_remove,
1118 };
1119
1120 module_i2c_driver(imx214_i2c_driver);
1121
1122 MODULE_DESCRIPTION("Sony IMX214 Camera driver");
1123 MODULE_AUTHOR("Ricardo Ribalda <ribalda@kernel.org>");
1124 MODULE_LICENSE("GPL v2");
1125