Merge tag 'powerpc-6.6-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
[platform/kernel/linux-starfive.git] / drivers / media / i2c / imx219.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * A V4L2 driver for Sony IMX219 cameras.
4  * Copyright (C) 2019, Raspberry Pi (Trading) Ltd
5  *
6  * Based on Sony imx258 camera driver
7  * Copyright (C) 2018 Intel Corporation
8  *
9  * DT / fwnode changes, and regulator / GPIO control taken from imx214 driver
10  * Copyright 2018 Qtechnology A/S
11  *
12  * Flip handling taken from the Sony IMX319 driver.
13  * Copyright (C) 2018 Intel Corporation
14  *
15  */
16
17 #include <linux/clk.h>
18 #include <linux/delay.h>
19 #include <linux/gpio/consumer.h>
20 #include <linux/i2c.h>
21 #include <linux/module.h>
22 #include <linux/pm_runtime.h>
23 #include <linux/regulator/consumer.h>
24 #include <media/v4l2-ctrls.h>
25 #include <media/v4l2-device.h>
26 #include <media/v4l2-event.h>
27 #include <media/v4l2-fwnode.h>
28 #include <media/v4l2-mediabus.h>
29 #include <asm/unaligned.h>
30
31 #define IMX219_REG_VALUE_08BIT          1
32 #define IMX219_REG_VALUE_16BIT          2
33
34 #define IMX219_REG_MODE_SELECT          0x0100
35 #define IMX219_MODE_STANDBY             0x00
36 #define IMX219_MODE_STREAMING           0x01
37
38 /* Chip ID */
39 #define IMX219_REG_CHIP_ID              0x0000
40 #define IMX219_CHIP_ID                  0x0219
41
42 /* External clock frequency is 24.0M */
43 #define IMX219_XCLK_FREQ                24000000
44
45 /* Pixel rate is fixed for all the modes */
46 #define IMX219_PIXEL_RATE               182400000
47 #define IMX219_PIXEL_RATE_4LANE         280800000
48
49 #define IMX219_DEFAULT_LINK_FREQ        456000000
50 #define IMX219_DEFAULT_LINK_FREQ_4LANE  363000000
51
52 #define IMX219_REG_CSI_LANE_MODE        0x0114
53 #define IMX219_CSI_2_LANE_MODE          0x01
54 #define IMX219_CSI_4_LANE_MODE          0x03
55
56 /* V_TIMING internal */
57 #define IMX219_REG_VTS                  0x0160
58 #define IMX219_VTS_15FPS                0x0dc6
59 #define IMX219_VTS_30FPS_1080P          0x06e3
60 #define IMX219_VTS_30FPS_BINNED         0x06e3
61 #define IMX219_VTS_30FPS_640x480        0x06e3
62 #define IMX219_VTS_MAX                  0xffff
63
64 #define IMX219_VBLANK_MIN               4
65
66 /*Frame Length Line*/
67 #define IMX219_FLL_MIN                  0x08a6
68 #define IMX219_FLL_MAX                  0xffff
69 #define IMX219_FLL_STEP                 1
70 #define IMX219_FLL_DEFAULT              0x0c98
71
72 /* HBLANK control - read only */
73 #define IMX219_PPL_DEFAULT              3448
74
75 /* Exposure control */
76 #define IMX219_REG_EXPOSURE             0x015a
77 #define IMX219_EXPOSURE_MIN             4
78 #define IMX219_EXPOSURE_STEP            1
79 #define IMX219_EXPOSURE_DEFAULT         0x640
80 #define IMX219_EXPOSURE_MAX             65535
81
82 /* Analog gain control */
83 #define IMX219_REG_ANALOG_GAIN          0x0157
84 #define IMX219_ANA_GAIN_MIN             0
85 #define IMX219_ANA_GAIN_MAX             232
86 #define IMX219_ANA_GAIN_STEP            1
87 #define IMX219_ANA_GAIN_DEFAULT         0x0
88
89 /* Digital gain control */
90 #define IMX219_REG_DIGITAL_GAIN         0x0158
91 #define IMX219_DGTL_GAIN_MIN            0x0100
92 #define IMX219_DGTL_GAIN_MAX            0x0fff
93 #define IMX219_DGTL_GAIN_DEFAULT        0x0100
94 #define IMX219_DGTL_GAIN_STEP           1
95
96 #define IMX219_REG_ORIENTATION          0x0172
97
98 /* Binning  Mode */
99 #define IMX219_REG_BINNING_MODE         0x0174
100 #define IMX219_BINNING_NONE             0x0000
101 #define IMX219_BINNING_2X2              0x0101
102 #define IMX219_BINNING_2X2_ANALOG       0x0303
103
104 /* Test Pattern Control */
105 #define IMX219_REG_TEST_PATTERN         0x0600
106 #define IMX219_TEST_PATTERN_DISABLE     0
107 #define IMX219_TEST_PATTERN_SOLID_COLOR 1
108 #define IMX219_TEST_PATTERN_COLOR_BARS  2
109 #define IMX219_TEST_PATTERN_GREY_COLOR  3
110 #define IMX219_TEST_PATTERN_PN9         4
111
112 /* Test pattern colour components */
113 #define IMX219_REG_TESTP_RED            0x0602
114 #define IMX219_REG_TESTP_GREENR         0x0604
115 #define IMX219_REG_TESTP_BLUE           0x0606
116 #define IMX219_REG_TESTP_GREENB         0x0608
117 #define IMX219_TESTP_COLOUR_MIN         0
118 #define IMX219_TESTP_COLOUR_MAX         0x03ff
119 #define IMX219_TESTP_COLOUR_STEP        1
120 #define IMX219_TESTP_RED_DEFAULT        IMX219_TESTP_COLOUR_MAX
121 #define IMX219_TESTP_GREENR_DEFAULT     0
122 #define IMX219_TESTP_BLUE_DEFAULT       0
123 #define IMX219_TESTP_GREENB_DEFAULT     0
124
125 /* IMX219 native and active pixel array size. */
126 #define IMX219_NATIVE_WIDTH             3296U
127 #define IMX219_NATIVE_HEIGHT            2480U
128 #define IMX219_PIXEL_ARRAY_LEFT         8U
129 #define IMX219_PIXEL_ARRAY_TOP          8U
130 #define IMX219_PIXEL_ARRAY_WIDTH        3280U
131 #define IMX219_PIXEL_ARRAY_HEIGHT       2464U
132
133 struct imx219_reg {
134         u16 address;
135         u8 val;
136 };
137
138 struct imx219_reg_list {
139         unsigned int num_of_regs;
140         const struct imx219_reg *regs;
141 };
142
143 /* Mode : resolution and related config&values */
144 struct imx219_mode {
145         /* Frame width */
146         unsigned int width;
147         /* Frame height */
148         unsigned int height;
149
150         /* Analog crop rectangle. */
151         struct v4l2_rect crop;
152
153         /* V-timing */
154         unsigned int vts_def;
155
156         /* Default register values */
157         struct imx219_reg_list reg_list;
158
159         /* 2x2 binning is used */
160         bool binning;
161 };
162
163 static const struct imx219_reg imx219_common_regs[] = {
164         {0x0100, 0x00}, /* Mode Select */
165
166         /* To Access Addresses 3000-5fff, send the following commands */
167         {0x30eb, 0x0c},
168         {0x30eb, 0x05},
169         {0x300a, 0xff},
170         {0x300b, 0xff},
171         {0x30eb, 0x05},
172         {0x30eb, 0x09},
173
174         /* PLL Clock Table */
175         {0x0301, 0x05}, /* VTPXCK_DIV */
176         {0x0303, 0x01}, /* VTSYSCK_DIV */
177         {0x0304, 0x03}, /* PREPLLCK_VT_DIV 0x03 = AUTO set */
178         {0x0305, 0x03}, /* PREPLLCK_OP_DIV 0x03 = AUTO set */
179         {0x0306, 0x00}, /* PLL_VT_MPY */
180         {0x0307, 0x39},
181         {0x030b, 0x01}, /* OP_SYS_CLK_DIV */
182         {0x030c, 0x00}, /* PLL_OP_MPY */
183         {0x030d, 0x72},
184
185         /* Undocumented registers */
186         {0x455e, 0x00},
187         {0x471e, 0x4b},
188         {0x4767, 0x0f},
189         {0x4750, 0x14},
190         {0x4540, 0x00},
191         {0x47b4, 0x14},
192         {0x4713, 0x30},
193         {0x478b, 0x10},
194         {0x478f, 0x10},
195         {0x4793, 0x10},
196         {0x4797, 0x0e},
197         {0x479b, 0x0e},
198
199         /* Frame Bank Register Group "A" */
200         {0x0162, 0x0d}, /* Line_Length_A */
201         {0x0163, 0x78},
202         {0x0170, 0x01}, /* X_ODD_INC_A */
203         {0x0171, 0x01}, /* Y_ODD_INC_A */
204
205         /* Output setup registers */
206         {0x0114, 0x01}, /* CSI 2-Lane Mode */
207         {0x0128, 0x00}, /* DPHY Auto Mode */
208         {0x012a, 0x18}, /* EXCK_Freq */
209         {0x012b, 0x00},
210 };
211
212 /*
213  * Register sets lifted off the i2C interface from the Raspberry Pi firmware
214  * driver.
215  * 3280x2464 = mode 2, 1920x1080 = mode 1, 1640x1232 = mode 4, 640x480 = mode 7.
216  */
217 static const struct imx219_reg mode_3280x2464_regs[] = {
218         {0x0164, 0x00},
219         {0x0165, 0x00},
220         {0x0166, 0x0c},
221         {0x0167, 0xcf},
222         {0x0168, 0x00},
223         {0x0169, 0x00},
224         {0x016a, 0x09},
225         {0x016b, 0x9f},
226         {0x016c, 0x0c},
227         {0x016d, 0xd0},
228         {0x016e, 0x09},
229         {0x016f, 0xa0},
230         {0x0624, 0x0c},
231         {0x0625, 0xd0},
232         {0x0626, 0x09},
233         {0x0627, 0xa0},
234 };
235
236 static const struct imx219_reg mode_1920_1080_regs[] = {
237         {0x0164, 0x02},
238         {0x0165, 0xa8},
239         {0x0166, 0x0a},
240         {0x0167, 0x27},
241         {0x0168, 0x02},
242         {0x0169, 0xb4},
243         {0x016a, 0x06},
244         {0x016b, 0xeb},
245         {0x016c, 0x07},
246         {0x016d, 0x80},
247         {0x016e, 0x04},
248         {0x016f, 0x38},
249         {0x0624, 0x07},
250         {0x0625, 0x80},
251         {0x0626, 0x04},
252         {0x0627, 0x38},
253 };
254
255 static const struct imx219_reg mode_1640_1232_regs[] = {
256         {0x0164, 0x00},
257         {0x0165, 0x00},
258         {0x0166, 0x0c},
259         {0x0167, 0xcf},
260         {0x0168, 0x00},
261         {0x0169, 0x00},
262         {0x016a, 0x09},
263         {0x016b, 0x9f},
264         {0x016c, 0x06},
265         {0x016d, 0x68},
266         {0x016e, 0x04},
267         {0x016f, 0xd0},
268         {0x0624, 0x06},
269         {0x0625, 0x68},
270         {0x0626, 0x04},
271         {0x0627, 0xd0},
272 };
273
274 static const struct imx219_reg mode_640_480_regs[] = {
275         {0x0164, 0x03},
276         {0x0165, 0xe8},
277         {0x0166, 0x08},
278         {0x0167, 0xe7},
279         {0x0168, 0x02},
280         {0x0169, 0xf0},
281         {0x016a, 0x06},
282         {0x016b, 0xaf},
283         {0x016c, 0x02},
284         {0x016d, 0x80},
285         {0x016e, 0x01},
286         {0x016f, 0xe0},
287         {0x0624, 0x06},
288         {0x0625, 0x68},
289         {0x0626, 0x04},
290         {0x0627, 0xd0},
291 };
292
293 static const struct imx219_reg raw8_framefmt_regs[] = {
294         {0x018c, 0x08},
295         {0x018d, 0x08},
296         {0x0309, 0x08},
297 };
298
299 static const struct imx219_reg raw10_framefmt_regs[] = {
300         {0x018c, 0x0a},
301         {0x018d, 0x0a},
302         {0x0309, 0x0a},
303 };
304
305 static const s64 imx219_link_freq_menu[] = {
306         IMX219_DEFAULT_LINK_FREQ,
307 };
308
309 static const s64 imx219_link_freq_4lane_menu[] = {
310         IMX219_DEFAULT_LINK_FREQ_4LANE,
311 };
312
313 static const char * const imx219_test_pattern_menu[] = {
314         "Disabled",
315         "Color Bars",
316         "Solid Color",
317         "Grey Color Bars",
318         "PN9"
319 };
320
321 static const int imx219_test_pattern_val[] = {
322         IMX219_TEST_PATTERN_DISABLE,
323         IMX219_TEST_PATTERN_COLOR_BARS,
324         IMX219_TEST_PATTERN_SOLID_COLOR,
325         IMX219_TEST_PATTERN_GREY_COLOR,
326         IMX219_TEST_PATTERN_PN9,
327 };
328
329 /* regulator supplies */
330 static const char * const imx219_supply_name[] = {
331         /* Supplies can be enabled in any order */
332         "VANA",  /* Analog (2.8V) supply */
333         "VDIG",  /* Digital Core (1.8V) supply */
334         "VDDL",  /* IF (1.2V) supply */
335 };
336
337 #define IMX219_NUM_SUPPLIES ARRAY_SIZE(imx219_supply_name)
338
339 /*
340  * The supported formats.
341  * This table MUST contain 4 entries per format, to cover the various flip
342  * combinations in the order
343  * - no flip
344  * - h flip
345  * - v flip
346  * - h&v flips
347  */
348 static const u32 imx219_mbus_formats[] = {
349         MEDIA_BUS_FMT_SRGGB10_1X10,
350         MEDIA_BUS_FMT_SGRBG10_1X10,
351         MEDIA_BUS_FMT_SGBRG10_1X10,
352         MEDIA_BUS_FMT_SBGGR10_1X10,
353
354         MEDIA_BUS_FMT_SRGGB8_1X8,
355         MEDIA_BUS_FMT_SGRBG8_1X8,
356         MEDIA_BUS_FMT_SGBRG8_1X8,
357         MEDIA_BUS_FMT_SBGGR8_1X8,
358 };
359
360 /*
361  * Initialisation delay between XCLR low->high and the moment when the sensor
362  * can start capture (i.e. can leave software stanby) must be not less than:
363  *   t4 + max(t5, t6 + <time to initialize the sensor register over I2C>)
364  * where
365  *   t4 is fixed, and is max 200uS,
366  *   t5 is fixed, and is 6000uS,
367  *   t6 depends on the sensor external clock, and is max 32000 clock periods.
368  * As per sensor datasheet, the external clock must be from 6MHz to 27MHz.
369  * So for any acceptable external clock t6 is always within the range of
370  * 1185 to 5333 uS, and is always less than t5.
371  * For this reason this is always safe to wait (t4 + t5) = 6200 uS, then
372  * initialize the sensor over I2C, and then exit the software standby.
373  *
374  * This start-up time can be optimized a bit more, if we start the writes
375  * over I2C after (t4+t6), but before (t4+t5) expires. But then sensor
376  * initialization over I2C may complete before (t4+t5) expires, and we must
377  * ensure that capture is not started before (t4+t5).
378  *
379  * This delay doesn't account for the power supply startup time. If needed,
380  * this should be taken care of via the regulator framework. E.g. in the
381  * case of DT for regulator-fixed one should define the startup-delay-us
382  * property.
383  */
384 #define IMX219_XCLR_MIN_DELAY_US        6200
385 #define IMX219_XCLR_DELAY_RANGE_US      1000
386
387 /* Mode configs */
388 static const struct imx219_mode supported_modes[] = {
389         {
390                 /* 8MPix 15fps mode */
391                 .width = 3280,
392                 .height = 2464,
393                 .crop = {
394                         .left = IMX219_PIXEL_ARRAY_LEFT,
395                         .top = IMX219_PIXEL_ARRAY_TOP,
396                         .width = 3280,
397                         .height = 2464
398                 },
399                 .vts_def = IMX219_VTS_15FPS,
400                 .reg_list = {
401                         .num_of_regs = ARRAY_SIZE(mode_3280x2464_regs),
402                         .regs = mode_3280x2464_regs,
403                 },
404                 .binning = false,
405         },
406         {
407                 /* 1080P 30fps cropped */
408                 .width = 1920,
409                 .height = 1080,
410                 .crop = {
411                         .left = 688,
412                         .top = 700,
413                         .width = 1920,
414                         .height = 1080
415                 },
416                 .vts_def = IMX219_VTS_30FPS_1080P,
417                 .reg_list = {
418                         .num_of_regs = ARRAY_SIZE(mode_1920_1080_regs),
419                         .regs = mode_1920_1080_regs,
420                 },
421                 .binning = false,
422         },
423         {
424                 /* 2x2 binned 30fps mode */
425                 .width = 1640,
426                 .height = 1232,
427                 .crop = {
428                         .left = IMX219_PIXEL_ARRAY_LEFT,
429                         .top = IMX219_PIXEL_ARRAY_TOP,
430                         .width = 3280,
431                         .height = 2464
432                 },
433                 .vts_def = IMX219_VTS_30FPS_BINNED,
434                 .reg_list = {
435                         .num_of_regs = ARRAY_SIZE(mode_1640_1232_regs),
436                         .regs = mode_1640_1232_regs,
437                 },
438                 .binning = true,
439         },
440         {
441                 /* 640x480 30fps mode */
442                 .width = 640,
443                 .height = 480,
444                 .crop = {
445                         .left = 1008,
446                         .top = 760,
447                         .width = 1280,
448                         .height = 960
449                 },
450                 .vts_def = IMX219_VTS_30FPS_640x480,
451                 .reg_list = {
452                         .num_of_regs = ARRAY_SIZE(mode_640_480_regs),
453                         .regs = mode_640_480_regs,
454                 },
455                 .binning = true,
456         },
457 };
458
459 struct imx219 {
460         struct v4l2_subdev sd;
461         struct media_pad pad;
462
463         struct clk *xclk; /* system clock to IMX219 */
464         u32 xclk_freq;
465
466         struct gpio_desc *reset_gpio;
467         struct regulator_bulk_data supplies[IMX219_NUM_SUPPLIES];
468
469         struct v4l2_ctrl_handler ctrl_handler;
470         /* V4L2 Controls */
471         struct v4l2_ctrl *pixel_rate;
472         struct v4l2_ctrl *link_freq;
473         struct v4l2_ctrl *exposure;
474         struct v4l2_ctrl *vflip;
475         struct v4l2_ctrl *hflip;
476         struct v4l2_ctrl *vblank;
477         struct v4l2_ctrl *hblank;
478
479         /* Current mode */
480         const struct imx219_mode *mode;
481
482         /* Streaming on/off */
483         bool streaming;
484
485         /* Two or Four lanes */
486         u8 lanes;
487 };
488
489 static inline struct imx219 *to_imx219(struct v4l2_subdev *_sd)
490 {
491         return container_of(_sd, struct imx219, sd);
492 }
493
494 /* Read registers up to 2 at a time */
495 static int imx219_read_reg(struct imx219 *imx219, u16 reg, u32 len, u32 *val)
496 {
497         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
498         struct i2c_msg msgs[2];
499         u8 addr_buf[2] = { reg >> 8, reg & 0xff };
500         u8 data_buf[4] = { 0, };
501         int ret;
502
503         if (len > 4)
504                 return -EINVAL;
505
506         /* Write register address */
507         msgs[0].addr = client->addr;
508         msgs[0].flags = 0;
509         msgs[0].len = ARRAY_SIZE(addr_buf);
510         msgs[0].buf = addr_buf;
511
512         /* Read data from register */
513         msgs[1].addr = client->addr;
514         msgs[1].flags = I2C_M_RD;
515         msgs[1].len = len;
516         msgs[1].buf = &data_buf[4 - len];
517
518         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
519         if (ret != ARRAY_SIZE(msgs))
520                 return -EIO;
521
522         *val = get_unaligned_be32(data_buf);
523
524         return 0;
525 }
526
527 /* Write registers up to 2 at a time */
528 static int imx219_write_reg(struct imx219 *imx219, u16 reg, u32 len, u32 val)
529 {
530         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
531         u8 buf[6];
532
533         if (len > 4)
534                 return -EINVAL;
535
536         put_unaligned_be16(reg, buf);
537         put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
538         if (i2c_master_send(client, buf, len + 2) != len + 2)
539                 return -EIO;
540
541         return 0;
542 }
543
544 /* Write a list of registers */
545 static int imx219_write_regs(struct imx219 *imx219,
546                              const struct imx219_reg *regs, u32 len)
547 {
548         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
549         unsigned int i;
550         int ret;
551
552         for (i = 0; i < len; i++) {
553                 ret = imx219_write_reg(imx219, regs[i].address, 1, regs[i].val);
554                 if (ret) {
555                         dev_err_ratelimited(&client->dev,
556                                             "Failed to write reg 0x%4.4x. error = %d\n",
557                                             regs[i].address, ret);
558
559                         return ret;
560                 }
561         }
562
563         return 0;
564 }
565
566 /* Get bayer order based on flip setting. */
567 static u32 imx219_get_format_code(struct imx219 *imx219, u32 code)
568 {
569         unsigned int i;
570
571         for (i = 0; i < ARRAY_SIZE(imx219_mbus_formats); i++)
572                 if (imx219_mbus_formats[i] == code)
573                         break;
574
575         if (i >= ARRAY_SIZE(imx219_mbus_formats))
576                 i = 0;
577
578         i = (i & ~3) | (imx219->vflip->val ? 2 : 0) |
579             (imx219->hflip->val ? 1 : 0);
580
581         return imx219_mbus_formats[i];
582 }
583
584 static int imx219_set_ctrl(struct v4l2_ctrl *ctrl)
585 {
586         struct imx219 *imx219 =
587                 container_of(ctrl->handler, struct imx219, ctrl_handler);
588         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
589         int ret;
590
591         if (ctrl->id == V4L2_CID_VBLANK) {
592                 int exposure_max, exposure_def;
593
594                 /* Update max exposure while meeting expected vblanking */
595                 exposure_max = imx219->mode->height + ctrl->val - 4;
596                 exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ?
597                         exposure_max : IMX219_EXPOSURE_DEFAULT;
598                 __v4l2_ctrl_modify_range(imx219->exposure,
599                                          imx219->exposure->minimum,
600                                          exposure_max, imx219->exposure->step,
601                                          exposure_def);
602         }
603
604         /*
605          * Applying V4L2 control value only happens
606          * when power is up for streaming
607          */
608         if (pm_runtime_get_if_in_use(&client->dev) == 0)
609                 return 0;
610
611         switch (ctrl->id) {
612         case V4L2_CID_ANALOGUE_GAIN:
613                 ret = imx219_write_reg(imx219, IMX219_REG_ANALOG_GAIN,
614                                        IMX219_REG_VALUE_08BIT, ctrl->val);
615                 break;
616         case V4L2_CID_EXPOSURE:
617                 ret = imx219_write_reg(imx219, IMX219_REG_EXPOSURE,
618                                        IMX219_REG_VALUE_16BIT, ctrl->val);
619                 break;
620         case V4L2_CID_DIGITAL_GAIN:
621                 ret = imx219_write_reg(imx219, IMX219_REG_DIGITAL_GAIN,
622                                        IMX219_REG_VALUE_16BIT, ctrl->val);
623                 break;
624         case V4L2_CID_TEST_PATTERN:
625                 ret = imx219_write_reg(imx219, IMX219_REG_TEST_PATTERN,
626                                        IMX219_REG_VALUE_16BIT,
627                                        imx219_test_pattern_val[ctrl->val]);
628                 break;
629         case V4L2_CID_HFLIP:
630         case V4L2_CID_VFLIP:
631                 ret = imx219_write_reg(imx219, IMX219_REG_ORIENTATION, 1,
632                                        imx219->hflip->val |
633                                        imx219->vflip->val << 1);
634                 break;
635         case V4L2_CID_VBLANK:
636                 ret = imx219_write_reg(imx219, IMX219_REG_VTS,
637                                        IMX219_REG_VALUE_16BIT,
638                                        imx219->mode->height + ctrl->val);
639                 break;
640         case V4L2_CID_TEST_PATTERN_RED:
641                 ret = imx219_write_reg(imx219, IMX219_REG_TESTP_RED,
642                                        IMX219_REG_VALUE_16BIT, ctrl->val);
643                 break;
644         case V4L2_CID_TEST_PATTERN_GREENR:
645                 ret = imx219_write_reg(imx219, IMX219_REG_TESTP_GREENR,
646                                        IMX219_REG_VALUE_16BIT, ctrl->val);
647                 break;
648         case V4L2_CID_TEST_PATTERN_BLUE:
649                 ret = imx219_write_reg(imx219, IMX219_REG_TESTP_BLUE,
650                                        IMX219_REG_VALUE_16BIT, ctrl->val);
651                 break;
652         case V4L2_CID_TEST_PATTERN_GREENB:
653                 ret = imx219_write_reg(imx219, IMX219_REG_TESTP_GREENB,
654                                        IMX219_REG_VALUE_16BIT, ctrl->val);
655                 break;
656         default:
657                 dev_info(&client->dev,
658                          "ctrl(id:0x%x,val:0x%x) is not handled\n",
659                          ctrl->id, ctrl->val);
660                 ret = -EINVAL;
661                 break;
662         }
663
664         pm_runtime_put(&client->dev);
665
666         return ret;
667 }
668
669 static const struct v4l2_ctrl_ops imx219_ctrl_ops = {
670         .s_ctrl = imx219_set_ctrl,
671 };
672
673 static void imx219_update_pad_format(struct imx219 *imx219,
674                                      const struct imx219_mode *mode,
675                                      struct v4l2_mbus_framefmt *fmt, u32 code)
676 {
677         /* Bayer order varies with flips */
678         fmt->code = imx219_get_format_code(imx219, code);
679         fmt->width = mode->width;
680         fmt->height = mode->height;
681         fmt->field = V4L2_FIELD_NONE;
682         fmt->colorspace = V4L2_COLORSPACE_RAW;
683         fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
684         fmt->xfer_func = V4L2_XFER_FUNC_NONE;
685 }
686
687 static int imx219_init_cfg(struct v4l2_subdev *sd,
688                            struct v4l2_subdev_state *state)
689 {
690         struct imx219 *imx219 = to_imx219(sd);
691         struct v4l2_mbus_framefmt *format;
692         struct v4l2_rect *crop;
693
694         /* Initialize the format. */
695         format = v4l2_subdev_get_pad_format(sd, state, 0);
696         imx219_update_pad_format(imx219, &supported_modes[0], format,
697                                  MEDIA_BUS_FMT_SRGGB10_1X10);
698
699         /* Initialize the crop rectangle. */
700         crop = v4l2_subdev_get_pad_crop(sd, state, 0);
701         crop->top = IMX219_PIXEL_ARRAY_TOP;
702         crop->left = IMX219_PIXEL_ARRAY_LEFT;
703         crop->width = IMX219_PIXEL_ARRAY_WIDTH;
704         crop->height = IMX219_PIXEL_ARRAY_HEIGHT;
705
706         return 0;
707 }
708
709 static int imx219_enum_mbus_code(struct v4l2_subdev *sd,
710                                  struct v4l2_subdev_state *sd_state,
711                                  struct v4l2_subdev_mbus_code_enum *code)
712 {
713         struct imx219 *imx219 = to_imx219(sd);
714
715         if (code->index >= (ARRAY_SIZE(imx219_mbus_formats) / 4))
716                 return -EINVAL;
717
718         code->code = imx219_get_format_code(imx219, imx219_mbus_formats[code->index * 4]);
719
720         return 0;
721 }
722
723 static int imx219_enum_frame_size(struct v4l2_subdev *sd,
724                                   struct v4l2_subdev_state *sd_state,
725                                   struct v4l2_subdev_frame_size_enum *fse)
726 {
727         struct imx219 *imx219 = to_imx219(sd);
728         u32 code;
729
730         if (fse->index >= ARRAY_SIZE(supported_modes))
731                 return -EINVAL;
732
733         code = imx219_get_format_code(imx219, fse->code);
734         if (fse->code != code)
735                 return -EINVAL;
736
737         fse->min_width = supported_modes[fse->index].width;
738         fse->max_width = fse->min_width;
739         fse->min_height = supported_modes[fse->index].height;
740         fse->max_height = fse->min_height;
741
742         return 0;
743 }
744
745 static int imx219_set_pad_format(struct v4l2_subdev *sd,
746                                  struct v4l2_subdev_state *sd_state,
747                                  struct v4l2_subdev_format *fmt)
748 {
749         struct imx219 *imx219 = to_imx219(sd);
750         const struct imx219_mode *mode;
751         int exposure_max, exposure_def, hblank;
752         struct v4l2_mbus_framefmt *format;
753         struct v4l2_rect *crop;
754
755         mode = v4l2_find_nearest_size(supported_modes,
756                                       ARRAY_SIZE(supported_modes),
757                                       width, height,
758                                       fmt->format.width, fmt->format.height);
759
760         imx219_update_pad_format(imx219, mode, &fmt->format, fmt->format.code);
761
762         format = v4l2_subdev_get_pad_format(sd, sd_state, 0);
763         crop = v4l2_subdev_get_pad_crop(sd, sd_state, 0);
764
765         *format = fmt->format;
766         *crop = mode->crop;
767
768         if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
769                 imx219->mode = mode;
770                 /* Update limits and set FPS to default */
771                 __v4l2_ctrl_modify_range(imx219->vblank, IMX219_VBLANK_MIN,
772                                          IMX219_VTS_MAX - mode->height, 1,
773                                          mode->vts_def - mode->height);
774                 __v4l2_ctrl_s_ctrl(imx219->vblank,
775                                    mode->vts_def - mode->height);
776                 /* Update max exposure while meeting expected vblanking */
777                 exposure_max = mode->vts_def - 4;
778                 exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ?
779                         exposure_max : IMX219_EXPOSURE_DEFAULT;
780                 __v4l2_ctrl_modify_range(imx219->exposure,
781                                          imx219->exposure->minimum,
782                                          exposure_max, imx219->exposure->step,
783                                          exposure_def);
784                 /*
785                  * Currently PPL is fixed to IMX219_PPL_DEFAULT, so hblank
786                  * depends on mode->width only, and is not changeble in any
787                  * way other than changing the mode.
788                  */
789                 hblank = IMX219_PPL_DEFAULT - mode->width;
790                 __v4l2_ctrl_modify_range(imx219->hblank, hblank, hblank, 1,
791                                          hblank);
792         }
793
794         return 0;
795 }
796
797 static int imx219_set_framefmt(struct imx219 *imx219,
798                                const struct v4l2_mbus_framefmt *format)
799 {
800         switch (format->code) {
801         case MEDIA_BUS_FMT_SRGGB8_1X8:
802         case MEDIA_BUS_FMT_SGRBG8_1X8:
803         case MEDIA_BUS_FMT_SGBRG8_1X8:
804         case MEDIA_BUS_FMT_SBGGR8_1X8:
805                 return imx219_write_regs(imx219, raw8_framefmt_regs,
806                                         ARRAY_SIZE(raw8_framefmt_regs));
807
808         case MEDIA_BUS_FMT_SRGGB10_1X10:
809         case MEDIA_BUS_FMT_SGRBG10_1X10:
810         case MEDIA_BUS_FMT_SGBRG10_1X10:
811         case MEDIA_BUS_FMT_SBGGR10_1X10:
812                 return imx219_write_regs(imx219, raw10_framefmt_regs,
813                                         ARRAY_SIZE(raw10_framefmt_regs));
814         }
815
816         return -EINVAL;
817 }
818
819 static int imx219_set_binning(struct imx219 *imx219,
820                               const struct v4l2_mbus_framefmt *format)
821 {
822         if (!imx219->mode->binning) {
823                 return imx219_write_reg(imx219, IMX219_REG_BINNING_MODE,
824                                         IMX219_REG_VALUE_16BIT,
825                                         IMX219_BINNING_NONE);
826         }
827
828         switch (format->code) {
829         case MEDIA_BUS_FMT_SRGGB8_1X8:
830         case MEDIA_BUS_FMT_SGRBG8_1X8:
831         case MEDIA_BUS_FMT_SGBRG8_1X8:
832         case MEDIA_BUS_FMT_SBGGR8_1X8:
833                 return imx219_write_reg(imx219, IMX219_REG_BINNING_MODE,
834                                         IMX219_REG_VALUE_16BIT,
835                                         IMX219_BINNING_2X2_ANALOG);
836
837         case MEDIA_BUS_FMT_SRGGB10_1X10:
838         case MEDIA_BUS_FMT_SGRBG10_1X10:
839         case MEDIA_BUS_FMT_SGBRG10_1X10:
840         case MEDIA_BUS_FMT_SBGGR10_1X10:
841                 return imx219_write_reg(imx219, IMX219_REG_BINNING_MODE,
842                                         IMX219_REG_VALUE_16BIT,
843                                         IMX219_BINNING_2X2);
844         }
845
846         return -EINVAL;
847 }
848
849 static int imx219_get_selection(struct v4l2_subdev *sd,
850                                 struct v4l2_subdev_state *sd_state,
851                                 struct v4l2_subdev_selection *sel)
852 {
853         switch (sel->target) {
854         case V4L2_SEL_TGT_CROP: {
855                 sel->r = *v4l2_subdev_get_pad_crop(sd, sd_state, 0);
856                 return 0;
857         }
858
859         case V4L2_SEL_TGT_NATIVE_SIZE:
860                 sel->r.top = 0;
861                 sel->r.left = 0;
862                 sel->r.width = IMX219_NATIVE_WIDTH;
863                 sel->r.height = IMX219_NATIVE_HEIGHT;
864
865                 return 0;
866
867         case V4L2_SEL_TGT_CROP_DEFAULT:
868         case V4L2_SEL_TGT_CROP_BOUNDS:
869                 sel->r.top = IMX219_PIXEL_ARRAY_TOP;
870                 sel->r.left = IMX219_PIXEL_ARRAY_LEFT;
871                 sel->r.width = IMX219_PIXEL_ARRAY_WIDTH;
872                 sel->r.height = IMX219_PIXEL_ARRAY_HEIGHT;
873
874                 return 0;
875         }
876
877         return -EINVAL;
878 }
879
880 static int imx219_configure_lanes(struct imx219 *imx219)
881 {
882         return imx219_write_reg(imx219, IMX219_REG_CSI_LANE_MODE,
883                                 IMX219_REG_VALUE_08BIT, (imx219->lanes == 2) ?
884                                 IMX219_CSI_2_LANE_MODE : IMX219_CSI_4_LANE_MODE);
885 };
886
887 static int imx219_start_streaming(struct imx219 *imx219,
888                                   struct v4l2_subdev_state *state)
889 {
890         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
891         const struct v4l2_mbus_framefmt *format;
892         const struct imx219_reg_list *reg_list;
893         int ret;
894
895         ret = pm_runtime_resume_and_get(&client->dev);
896         if (ret < 0)
897                 return ret;
898
899         /* Send all registers that are common to all modes */
900         ret = imx219_write_regs(imx219, imx219_common_regs, ARRAY_SIZE(imx219_common_regs));
901         if (ret) {
902                 dev_err(&client->dev, "%s failed to send mfg header\n", __func__);
903                 goto err_rpm_put;
904         }
905
906         /* Configure two or four Lane mode */
907         ret = imx219_configure_lanes(imx219);
908         if (ret) {
909                 dev_err(&client->dev, "%s failed to configure lanes\n", __func__);
910                 goto err_rpm_put;
911         }
912
913         /* Apply default values of current mode */
914         reg_list = &imx219->mode->reg_list;
915         ret = imx219_write_regs(imx219, reg_list->regs, reg_list->num_of_regs);
916         if (ret) {
917                 dev_err(&client->dev, "%s failed to set mode\n", __func__);
918                 goto err_rpm_put;
919         }
920
921         format = v4l2_subdev_get_pad_format(&imx219->sd, state, 0);
922         ret = imx219_set_framefmt(imx219, format);
923         if (ret) {
924                 dev_err(&client->dev, "%s failed to set frame format: %d\n",
925                         __func__, ret);
926                 goto err_rpm_put;
927         }
928
929         ret = imx219_set_binning(imx219, format);
930         if (ret) {
931                 dev_err(&client->dev, "%s failed to set binning: %d\n",
932                         __func__, ret);
933                 goto err_rpm_put;
934         }
935
936         /* Apply customized values from user */
937         ret =  __v4l2_ctrl_handler_setup(imx219->sd.ctrl_handler);
938         if (ret)
939                 goto err_rpm_put;
940
941         /* set stream on register */
942         ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
943                                IMX219_REG_VALUE_08BIT, IMX219_MODE_STREAMING);
944         if (ret)
945                 goto err_rpm_put;
946
947         /* vflip and hflip cannot change during streaming */
948         __v4l2_ctrl_grab(imx219->vflip, true);
949         __v4l2_ctrl_grab(imx219->hflip, true);
950
951         return 0;
952
953 err_rpm_put:
954         pm_runtime_put(&client->dev);
955         return ret;
956 }
957
958 static void imx219_stop_streaming(struct imx219 *imx219)
959 {
960         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
961         int ret;
962
963         /* set stream off register */
964         ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
965                                IMX219_REG_VALUE_08BIT, IMX219_MODE_STANDBY);
966         if (ret)
967                 dev_err(&client->dev, "%s failed to set stream\n", __func__);
968
969         __v4l2_ctrl_grab(imx219->vflip, false);
970         __v4l2_ctrl_grab(imx219->hflip, false);
971
972         pm_runtime_put(&client->dev);
973 }
974
975 static int imx219_set_stream(struct v4l2_subdev *sd, int enable)
976 {
977         struct imx219 *imx219 = to_imx219(sd);
978         struct v4l2_subdev_state *state;
979         int ret = 0;
980
981         state = v4l2_subdev_lock_and_get_active_state(sd);
982
983         if (imx219->streaming == enable)
984                 goto unlock;
985
986         if (enable) {
987                 /*
988                  * Apply default & customized values
989                  * and then start streaming.
990                  */
991                 ret = imx219_start_streaming(imx219, state);
992                 if (ret)
993                         goto unlock;
994         } else {
995                 imx219_stop_streaming(imx219);
996         }
997
998         imx219->streaming = enable;
999
1000 unlock:
1001         v4l2_subdev_unlock_state(state);
1002         return ret;
1003 }
1004
1005 /* Power/clock management functions */
1006 static int imx219_power_on(struct device *dev)
1007 {
1008         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1009         struct imx219 *imx219 = to_imx219(sd);
1010         int ret;
1011
1012         ret = regulator_bulk_enable(IMX219_NUM_SUPPLIES,
1013                                     imx219->supplies);
1014         if (ret) {
1015                 dev_err(dev, "%s: failed to enable regulators\n",
1016                         __func__);
1017                 return ret;
1018         }
1019
1020         ret = clk_prepare_enable(imx219->xclk);
1021         if (ret) {
1022                 dev_err(dev, "%s: failed to enable clock\n",
1023                         __func__);
1024                 goto reg_off;
1025         }
1026
1027         gpiod_set_value_cansleep(imx219->reset_gpio, 1);
1028         usleep_range(IMX219_XCLR_MIN_DELAY_US,
1029                      IMX219_XCLR_MIN_DELAY_US + IMX219_XCLR_DELAY_RANGE_US);
1030
1031         return 0;
1032
1033 reg_off:
1034         regulator_bulk_disable(IMX219_NUM_SUPPLIES, imx219->supplies);
1035
1036         return ret;
1037 }
1038
1039 static int imx219_power_off(struct device *dev)
1040 {
1041         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1042         struct imx219 *imx219 = to_imx219(sd);
1043
1044         gpiod_set_value_cansleep(imx219->reset_gpio, 0);
1045         regulator_bulk_disable(IMX219_NUM_SUPPLIES, imx219->supplies);
1046         clk_disable_unprepare(imx219->xclk);
1047
1048         return 0;
1049 }
1050
1051 static int __maybe_unused imx219_suspend(struct device *dev)
1052 {
1053         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1054         struct imx219 *imx219 = to_imx219(sd);
1055
1056         if (imx219->streaming)
1057                 imx219_stop_streaming(imx219);
1058
1059         return 0;
1060 }
1061
1062 static int __maybe_unused imx219_resume(struct device *dev)
1063 {
1064         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1065         struct imx219 *imx219 = to_imx219(sd);
1066         struct v4l2_subdev_state *state;
1067         int ret;
1068
1069         if (imx219->streaming) {
1070                 state = v4l2_subdev_lock_and_get_active_state(sd);
1071                 ret = imx219_start_streaming(imx219, state);
1072                 v4l2_subdev_unlock_state(state);
1073                 if (ret)
1074                         goto error;
1075         }
1076
1077         return 0;
1078
1079 error:
1080         imx219_stop_streaming(imx219);
1081         imx219->streaming = false;
1082
1083         return ret;
1084 }
1085
1086 static int imx219_get_regulators(struct imx219 *imx219)
1087 {
1088         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
1089         unsigned int i;
1090
1091         for (i = 0; i < IMX219_NUM_SUPPLIES; i++)
1092                 imx219->supplies[i].supply = imx219_supply_name[i];
1093
1094         return devm_regulator_bulk_get(&client->dev,
1095                                        IMX219_NUM_SUPPLIES,
1096                                        imx219->supplies);
1097 }
1098
1099 /* Verify chip ID */
1100 static int imx219_identify_module(struct imx219 *imx219)
1101 {
1102         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
1103         int ret;
1104         u32 val;
1105
1106         ret = imx219_read_reg(imx219, IMX219_REG_CHIP_ID,
1107                               IMX219_REG_VALUE_16BIT, &val);
1108         if (ret) {
1109                 dev_err(&client->dev, "failed to read chip id %x\n",
1110                         IMX219_CHIP_ID);
1111                 return ret;
1112         }
1113
1114         if (val != IMX219_CHIP_ID) {
1115                 dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
1116                         IMX219_CHIP_ID, val);
1117                 return -EIO;
1118         }
1119
1120         return 0;
1121 }
1122
1123 static const struct v4l2_subdev_core_ops imx219_core_ops = {
1124         .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
1125         .unsubscribe_event = v4l2_event_subdev_unsubscribe,
1126 };
1127
1128 static const struct v4l2_subdev_video_ops imx219_video_ops = {
1129         .s_stream = imx219_set_stream,
1130 };
1131
1132 static const struct v4l2_subdev_pad_ops imx219_pad_ops = {
1133         .init_cfg = imx219_init_cfg,
1134         .enum_mbus_code = imx219_enum_mbus_code,
1135         .get_fmt = v4l2_subdev_get_fmt,
1136         .set_fmt = imx219_set_pad_format,
1137         .get_selection = imx219_get_selection,
1138         .enum_frame_size = imx219_enum_frame_size,
1139 };
1140
1141 static const struct v4l2_subdev_ops imx219_subdev_ops = {
1142         .core = &imx219_core_ops,
1143         .video = &imx219_video_ops,
1144         .pad = &imx219_pad_ops,
1145 };
1146
1147
1148 static unsigned long imx219_get_pixel_rate(struct imx219 *imx219)
1149 {
1150         return (imx219->lanes == 2) ? IMX219_PIXEL_RATE : IMX219_PIXEL_RATE_4LANE;
1151 }
1152
1153 /* Initialize control handlers */
1154 static int imx219_init_controls(struct imx219 *imx219)
1155 {
1156         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
1157         struct v4l2_ctrl_handler *ctrl_hdlr;
1158         unsigned int height = imx219->mode->height;
1159         struct v4l2_fwnode_device_properties props;
1160         int exposure_max, exposure_def, hblank;
1161         int i, ret;
1162
1163         ctrl_hdlr = &imx219->ctrl_handler;
1164         ret = v4l2_ctrl_handler_init(ctrl_hdlr, 12);
1165         if (ret)
1166                 return ret;
1167
1168         /* By default, PIXEL_RATE is read only */
1169         imx219->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1170                                                V4L2_CID_PIXEL_RATE,
1171                                                imx219_get_pixel_rate(imx219),
1172                                                imx219_get_pixel_rate(imx219), 1,
1173                                                imx219_get_pixel_rate(imx219));
1174
1175         imx219->link_freq =
1176                 v4l2_ctrl_new_int_menu(ctrl_hdlr, &imx219_ctrl_ops,
1177                                        V4L2_CID_LINK_FREQ,
1178                                        ARRAY_SIZE(imx219_link_freq_menu) - 1, 0,
1179                                        (imx219->lanes == 2) ? imx219_link_freq_menu :
1180                                        imx219_link_freq_4lane_menu);
1181         if (imx219->link_freq)
1182                 imx219->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1183
1184         /* Initial vblank/hblank/exposure parameters based on current mode */
1185         imx219->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1186                                            V4L2_CID_VBLANK, IMX219_VBLANK_MIN,
1187                                            IMX219_VTS_MAX - height, 1,
1188                                            imx219->mode->vts_def - height);
1189         hblank = IMX219_PPL_DEFAULT - imx219->mode->width;
1190         imx219->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1191                                            V4L2_CID_HBLANK, hblank, hblank,
1192                                            1, hblank);
1193         if (imx219->hblank)
1194                 imx219->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1195         exposure_max = imx219->mode->vts_def - 4;
1196         exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ?
1197                 exposure_max : IMX219_EXPOSURE_DEFAULT;
1198         imx219->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1199                                              V4L2_CID_EXPOSURE,
1200                                              IMX219_EXPOSURE_MIN, exposure_max,
1201                                              IMX219_EXPOSURE_STEP,
1202                                              exposure_def);
1203
1204         v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
1205                           IMX219_ANA_GAIN_MIN, IMX219_ANA_GAIN_MAX,
1206                           IMX219_ANA_GAIN_STEP, IMX219_ANA_GAIN_DEFAULT);
1207
1208         v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
1209                           IMX219_DGTL_GAIN_MIN, IMX219_DGTL_GAIN_MAX,
1210                           IMX219_DGTL_GAIN_STEP, IMX219_DGTL_GAIN_DEFAULT);
1211
1212         imx219->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1213                                           V4L2_CID_HFLIP, 0, 1, 1, 0);
1214         if (imx219->hflip)
1215                 imx219->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
1216
1217         imx219->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1218                                           V4L2_CID_VFLIP, 0, 1, 1, 0);
1219         if (imx219->vflip)
1220                 imx219->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
1221
1222         v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx219_ctrl_ops,
1223                                      V4L2_CID_TEST_PATTERN,
1224                                      ARRAY_SIZE(imx219_test_pattern_menu) - 1,
1225                                      0, 0, imx219_test_pattern_menu);
1226         for (i = 0; i < 4; i++) {
1227                 /*
1228                  * The assumption is that
1229                  * V4L2_CID_TEST_PATTERN_GREENR == V4L2_CID_TEST_PATTERN_RED + 1
1230                  * V4L2_CID_TEST_PATTERN_BLUE   == V4L2_CID_TEST_PATTERN_RED + 2
1231                  * V4L2_CID_TEST_PATTERN_GREENB == V4L2_CID_TEST_PATTERN_RED + 3
1232                  */
1233                 v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1234                                   V4L2_CID_TEST_PATTERN_RED + i,
1235                                   IMX219_TESTP_COLOUR_MIN,
1236                                   IMX219_TESTP_COLOUR_MAX,
1237                                   IMX219_TESTP_COLOUR_STEP,
1238                                   IMX219_TESTP_COLOUR_MAX);
1239                 /* The "Solid color" pattern is white by default */
1240         }
1241
1242         if (ctrl_hdlr->error) {
1243                 ret = ctrl_hdlr->error;
1244                 dev_err(&client->dev, "%s control init failed (%d)\n",
1245                         __func__, ret);
1246                 goto error;
1247         }
1248
1249         ret = v4l2_fwnode_device_parse(&client->dev, &props);
1250         if (ret)
1251                 goto error;
1252
1253         ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &imx219_ctrl_ops,
1254                                               &props);
1255         if (ret)
1256                 goto error;
1257
1258         imx219->sd.ctrl_handler = ctrl_hdlr;
1259
1260         return 0;
1261
1262 error:
1263         v4l2_ctrl_handler_free(ctrl_hdlr);
1264
1265         return ret;
1266 }
1267
1268 static void imx219_free_controls(struct imx219 *imx219)
1269 {
1270         v4l2_ctrl_handler_free(imx219->sd.ctrl_handler);
1271 }
1272
1273 static int imx219_check_hwcfg(struct device *dev, struct imx219 *imx219)
1274 {
1275         struct fwnode_handle *endpoint;
1276         struct v4l2_fwnode_endpoint ep_cfg = {
1277                 .bus_type = V4L2_MBUS_CSI2_DPHY
1278         };
1279         int ret = -EINVAL;
1280
1281         endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
1282         if (!endpoint) {
1283                 dev_err(dev, "endpoint node not found\n");
1284                 return -EINVAL;
1285         }
1286
1287         if (v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep_cfg)) {
1288                 dev_err(dev, "could not parse endpoint\n");
1289                 goto error_out;
1290         }
1291
1292         /* Check the number of MIPI CSI2 data lanes */
1293         if (ep_cfg.bus.mipi_csi2.num_data_lanes != 2 &&
1294             ep_cfg.bus.mipi_csi2.num_data_lanes != 4) {
1295                 dev_err(dev, "only 2 or 4 data lanes are currently supported\n");
1296                 goto error_out;
1297         }
1298         imx219->lanes = ep_cfg.bus.mipi_csi2.num_data_lanes;
1299
1300         /* Check the link frequency set in device tree */
1301         if (!ep_cfg.nr_of_link_frequencies) {
1302                 dev_err(dev, "link-frequency property not found in DT\n");
1303                 goto error_out;
1304         }
1305
1306         if (ep_cfg.nr_of_link_frequencies != 1 ||
1307            (ep_cfg.link_frequencies[0] != ((imx219->lanes == 2) ?
1308             IMX219_DEFAULT_LINK_FREQ : IMX219_DEFAULT_LINK_FREQ_4LANE))) {
1309                 dev_err(dev, "Link frequency not supported: %lld\n",
1310                         ep_cfg.link_frequencies[0]);
1311                 goto error_out;
1312         }
1313
1314         ret = 0;
1315
1316 error_out:
1317         v4l2_fwnode_endpoint_free(&ep_cfg);
1318         fwnode_handle_put(endpoint);
1319
1320         return ret;
1321 }
1322
1323 static int imx219_probe(struct i2c_client *client)
1324 {
1325         struct device *dev = &client->dev;
1326         struct imx219 *imx219;
1327         int ret;
1328
1329         imx219 = devm_kzalloc(&client->dev, sizeof(*imx219), GFP_KERNEL);
1330         if (!imx219)
1331                 return -ENOMEM;
1332
1333         v4l2_i2c_subdev_init(&imx219->sd, client, &imx219_subdev_ops);
1334
1335         /* Check the hardware configuration in device tree */
1336         if (imx219_check_hwcfg(dev, imx219))
1337                 return -EINVAL;
1338
1339         /* Get system clock (xclk) */
1340         imx219->xclk = devm_clk_get(dev, NULL);
1341         if (IS_ERR(imx219->xclk)) {
1342                 dev_err(dev, "failed to get xclk\n");
1343                 return PTR_ERR(imx219->xclk);
1344         }
1345
1346         imx219->xclk_freq = clk_get_rate(imx219->xclk);
1347         if (imx219->xclk_freq != IMX219_XCLK_FREQ) {
1348                 dev_err(dev, "xclk frequency not supported: %d Hz\n",
1349                         imx219->xclk_freq);
1350                 return -EINVAL;
1351         }
1352
1353         ret = imx219_get_regulators(imx219);
1354         if (ret) {
1355                 dev_err(dev, "failed to get regulators\n");
1356                 return ret;
1357         }
1358
1359         /* Request optional enable pin */
1360         imx219->reset_gpio = devm_gpiod_get_optional(dev, "reset",
1361                                                      GPIOD_OUT_HIGH);
1362
1363         /*
1364          * The sensor must be powered for imx219_identify_module()
1365          * to be able to read the CHIP_ID register
1366          */
1367         ret = imx219_power_on(dev);
1368         if (ret)
1369                 return ret;
1370
1371         ret = imx219_identify_module(imx219);
1372         if (ret)
1373                 goto error_power_off;
1374
1375         /* Set default mode to max resolution */
1376         imx219->mode = &supported_modes[0];
1377
1378         /* sensor doesn't enter LP-11 state upon power up until and unless
1379          * streaming is started, so upon power up switch the modes to:
1380          * streaming -> standby
1381          */
1382         ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
1383                                IMX219_REG_VALUE_08BIT, IMX219_MODE_STREAMING);
1384         if (ret < 0)
1385                 goto error_power_off;
1386         usleep_range(100, 110);
1387
1388         /* put sensor back to standby mode */
1389         ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
1390                                IMX219_REG_VALUE_08BIT, IMX219_MODE_STANDBY);
1391         if (ret < 0)
1392                 goto error_power_off;
1393         usleep_range(100, 110);
1394
1395         ret = imx219_init_controls(imx219);
1396         if (ret)
1397                 goto error_power_off;
1398
1399         /* Initialize subdev */
1400         imx219->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
1401                             V4L2_SUBDEV_FL_HAS_EVENTS;
1402         imx219->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1403
1404         /* Initialize source pad */
1405         imx219->pad.flags = MEDIA_PAD_FL_SOURCE;
1406
1407         ret = media_entity_pads_init(&imx219->sd.entity, 1, &imx219->pad);
1408         if (ret) {
1409                 dev_err(dev, "failed to init entity pads: %d\n", ret);
1410                 goto error_handler_free;
1411         }
1412
1413         imx219->sd.state_lock = imx219->ctrl_handler.lock;
1414         ret = v4l2_subdev_init_finalize(&imx219->sd);
1415         if (ret < 0) {
1416                 dev_err(dev, "subdev init error: %d\n", ret);
1417                 goto error_media_entity;
1418         }
1419
1420         ret = v4l2_async_register_subdev_sensor(&imx219->sd);
1421         if (ret < 0) {
1422                 dev_err(dev, "failed to register sensor sub-device: %d\n", ret);
1423                 goto error_subdev_cleanup;
1424         }
1425
1426         /* Enable runtime PM and turn off the device */
1427         pm_runtime_set_active(dev);
1428         pm_runtime_enable(dev);
1429         pm_runtime_idle(dev);
1430
1431         return 0;
1432
1433 error_subdev_cleanup:
1434         v4l2_subdev_cleanup(&imx219->sd);
1435
1436 error_media_entity:
1437         media_entity_cleanup(&imx219->sd.entity);
1438
1439 error_handler_free:
1440         imx219_free_controls(imx219);
1441
1442 error_power_off:
1443         imx219_power_off(dev);
1444
1445         return ret;
1446 }
1447
1448 static void imx219_remove(struct i2c_client *client)
1449 {
1450         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1451         struct imx219 *imx219 = to_imx219(sd);
1452
1453         v4l2_async_unregister_subdev(sd);
1454         v4l2_subdev_cleanup(sd);
1455         media_entity_cleanup(&sd->entity);
1456         imx219_free_controls(imx219);
1457
1458         pm_runtime_disable(&client->dev);
1459         if (!pm_runtime_status_suspended(&client->dev))
1460                 imx219_power_off(&client->dev);
1461         pm_runtime_set_suspended(&client->dev);
1462 }
1463
1464 static const struct of_device_id imx219_dt_ids[] = {
1465         { .compatible = "sony,imx219" },
1466         { /* sentinel */ }
1467 };
1468 MODULE_DEVICE_TABLE(of, imx219_dt_ids);
1469
1470 static const struct dev_pm_ops imx219_pm_ops = {
1471         SET_SYSTEM_SLEEP_PM_OPS(imx219_suspend, imx219_resume)
1472         SET_RUNTIME_PM_OPS(imx219_power_off, imx219_power_on, NULL)
1473 };
1474
1475 static struct i2c_driver imx219_i2c_driver = {
1476         .driver = {
1477                 .name = "imx219",
1478                 .of_match_table = imx219_dt_ids,
1479                 .pm = &imx219_pm_ops,
1480         },
1481         .probe = imx219_probe,
1482         .remove = imx219_remove,
1483 };
1484
1485 module_i2c_driver(imx219_i2c_driver);
1486
1487 MODULE_AUTHOR("Dave Stevenson <dave.stevenson@raspberrypi.com");
1488 MODULE_DESCRIPTION("Sony IMX219 sensor driver");
1489 MODULE_LICENSE("GPL v2");