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arm64: futex: Avoid copying out uninitialised stack in failed cmpxchg()
[linux/fpc-iii.git] / drivers / media / i2c / rj54n1cb0c.c
blob6ad998ad1b167f931f42727aa620efbf2b6e782f
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Driver for RJ54N1CB0C CMOS Image Sensor from Sharp
4 *
5 * Copyright (C) 2018, Jacopo Mondi <jacopo@jmondi.org>
6 *
7 * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
8 */
9
10 #include <linux/clk.h>
11 #include <linux/delay.h>
12 #include <linux/gpio/consumer.h>
13 #include <linux/i2c.h>
14 #include <linux/module.h>
15 #include <linux/slab.h>
16 #include <linux/v4l2-mediabus.h>
17 #include <linux/videodev2.h>
18
19 #include <media/i2c/rj54n1cb0c.h>
20 #include <media/v4l2-device.h>
21 #include <media/v4l2-ctrls.h>
22 #include <media/v4l2-subdev.h>
23
24 #define RJ54N1_DEV_CODE 0x0400
25 #define RJ54N1_DEV_CODE2 0x0401
26 #define RJ54N1_OUT_SEL 0x0403
27 #define RJ54N1_XY_OUTPUT_SIZE_S_H 0x0404
28 #define RJ54N1_X_OUTPUT_SIZE_S_L 0x0405
29 #define RJ54N1_Y_OUTPUT_SIZE_S_L 0x0406
30 #define RJ54N1_XY_OUTPUT_SIZE_P_H 0x0407
31 #define RJ54N1_X_OUTPUT_SIZE_P_L 0x0408
32 #define RJ54N1_Y_OUTPUT_SIZE_P_L 0x0409
33 #define RJ54N1_LINE_LENGTH_PCK_S_H 0x040a
34 #define RJ54N1_LINE_LENGTH_PCK_S_L 0x040b
35 #define RJ54N1_LINE_LENGTH_PCK_P_H 0x040c
36 #define RJ54N1_LINE_LENGTH_PCK_P_L 0x040d
37 #define RJ54N1_RESIZE_N 0x040e
38 #define RJ54N1_RESIZE_N_STEP 0x040f
39 #define RJ54N1_RESIZE_STEP 0x0410
40 #define RJ54N1_RESIZE_HOLD_H 0x0411
41 #define RJ54N1_RESIZE_HOLD_L 0x0412
42 #define RJ54N1_H_OBEN_OFS 0x0413
43 #define RJ54N1_V_OBEN_OFS 0x0414
44 #define RJ54N1_RESIZE_CONTROL 0x0415
45 #define RJ54N1_STILL_CONTROL 0x0417
46 #define RJ54N1_INC_USE_SEL_H 0x0425
47 #define RJ54N1_INC_USE_SEL_L 0x0426
48 #define RJ54N1_MIRROR_STILL_MODE 0x0427
49 #define RJ54N1_INIT_START 0x0428
50 #define RJ54N1_SCALE_1_2_LEV 0x0429
51 #define RJ54N1_SCALE_4_LEV 0x042a
52 #define RJ54N1_Y_GAIN 0x04d8
53 #define RJ54N1_APT_GAIN_UP 0x04fa
54 #define RJ54N1_RA_SEL_UL 0x0530
55 #define RJ54N1_BYTE_SWAP 0x0531
56 #define RJ54N1_OUT_SIGPO 0x053b
57 #define RJ54N1_WB_SEL_WEIGHT_I 0x054e
58 #define RJ54N1_BIT8_WB 0x0569
59 #define RJ54N1_HCAPS_WB 0x056a
60 #define RJ54N1_VCAPS_WB 0x056b
61 #define RJ54N1_HCAPE_WB 0x056c
62 #define RJ54N1_VCAPE_WB 0x056d
63 #define RJ54N1_EXPOSURE_CONTROL 0x058c
64 #define RJ54N1_FRAME_LENGTH_S_H 0x0595
65 #define RJ54N1_FRAME_LENGTH_S_L 0x0596
66 #define RJ54N1_FRAME_LENGTH_P_H 0x0597
67 #define RJ54N1_FRAME_LENGTH_P_L 0x0598
68 #define RJ54N1_PEAK_H 0x05b7
69 #define RJ54N1_PEAK_50 0x05b8
70 #define RJ54N1_PEAK_60 0x05b9
71 #define RJ54N1_PEAK_DIFF 0x05ba
72 #define RJ54N1_IOC 0x05ef
73 #define RJ54N1_TG_BYPASS 0x0700
74 #define RJ54N1_PLL_L 0x0701
75 #define RJ54N1_PLL_N 0x0702
76 #define RJ54N1_PLL_EN 0x0704
77 #define RJ54N1_RATIO_TG 0x0706
78 #define RJ54N1_RATIO_T 0x0707
79 #define RJ54N1_RATIO_R 0x0708
80 #define RJ54N1_RAMP_TGCLK_EN 0x0709
81 #define RJ54N1_OCLK_DSP 0x0710
82 #define RJ54N1_RATIO_OP 0x0711
83 #define RJ54N1_RATIO_O 0x0712
84 #define RJ54N1_OCLK_SEL_EN 0x0713
85 #define RJ54N1_CLK_RST 0x0717
86 #define RJ54N1_RESET_STANDBY 0x0718
87 #define RJ54N1_FWFLG 0x07fe
88
89 #define E_EXCLK (1 << 7)
90 #define SOFT_STDBY (1 << 4)
91 #define SEN_RSTX (1 << 2)
92 #define TG_RSTX (1 << 1)
93 #define DSP_RSTX (1 << 0)
94
95 #define RESIZE_HOLD_SEL (1 << 2)
96 #define RESIZE_GO (1 << 1)
97
98 /*
99 * When cropping, the camera automatically centers the cropped region, there
100 * doesn't seem to be a way to specify an explicit location of the rectangle.
101 */
102 #define RJ54N1_COLUMN_SKIP 0
103 #define RJ54N1_ROW_SKIP 0
104 #define RJ54N1_MAX_WIDTH 1600
105 #define RJ54N1_MAX_HEIGHT 1200
106
107 #define PLL_L 2
108 #define PLL_N 0x31
109
110 /* I2C addresses: 0x50, 0x51, 0x60, 0x61 */
111
112 /* RJ54N1CB0C has only one fixed colorspace per pixelcode */
113 struct rj54n1_datafmt {
114 u32 code;
115 enum v4l2_colorspace colorspace;
116 };
117
118 /* Find a data format by a pixel code in an array */
119 static const struct rj54n1_datafmt *rj54n1_find_datafmt(
120 u32 code, const struct rj54n1_datafmt *fmt,
121 int n)
122 {
123 int i;
124 for (i = 0; i < n; i++)
125 if (fmt[i].code == code)
126 return fmt + i;
127
128 return NULL;
129 }
130
131 static const struct rj54n1_datafmt rj54n1_colour_fmts[] = {
132 {MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG},
133 {MEDIA_BUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG},
134 {MEDIA_BUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB},
135 {MEDIA_BUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB},
136 {MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB},
137 {MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE, V4L2_COLORSPACE_SRGB},
138 {MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE, V4L2_COLORSPACE_SRGB},
139 {MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE, V4L2_COLORSPACE_SRGB},
140 {MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
141 };
142
143 struct rj54n1_clock_div {
144 u8 ratio_tg; /* can be 0 or an odd number */
145 u8 ratio_t;
146 u8 ratio_r;
147 u8 ratio_op;
148 u8 ratio_o;
149 };
150
151 struct rj54n1 {
152 struct v4l2_subdev subdev;
153 struct v4l2_ctrl_handler hdl;
154 struct clk *clk;
155 struct gpio_desc *pwup_gpio;
156 struct gpio_desc *enable_gpio;
157 struct rj54n1_clock_div clk_div;
158 const struct rj54n1_datafmt *fmt;
159 struct v4l2_rect rect; /* Sensor window */
160 unsigned int tgclk_mhz;
161 bool auto_wb;
162 unsigned short width; /* Output window */
163 unsigned short height;
164 unsigned short resize; /* Sensor * 1024 / resize = Output */
165 unsigned short scale;
166 u8 bank;
167 };
168
169 struct rj54n1_reg_val {
170 u16 reg;
171 u8 val;
172 };
173
174 static const struct rj54n1_reg_val bank_4[] = {
175 {0x417, 0},
176 {0x42c, 0},
177 {0x42d, 0xf0},
178 {0x42e, 0},
179 {0x42f, 0x50},
180 {0x430, 0xf5},
181 {0x431, 0x16},
182 {0x432, 0x20},
183 {0x433, 0},
184 {0x434, 0xc8},
185 {0x43c, 8},
186 {0x43e, 0x90},
187 {0x445, 0x83},
188 {0x4ba, 0x58},
189 {0x4bb, 4},
190 {0x4bc, 0x20},
191 {0x4db, 4},
192 {0x4fe, 2},
193 };
194
195 static const struct rj54n1_reg_val bank_5[] = {
196 {0x514, 0},
197 {0x516, 0},
198 {0x518, 0},
199 {0x51a, 0},
200 {0x51d, 0xff},
201 {0x56f, 0x28},
202 {0x575, 0x40},
203 {0x5bc, 0x48},
204 {0x5c1, 6},
205 {0x5e5, 0x11},
206 {0x5e6, 0x43},
207 {0x5e7, 0x33},
208 {0x5e8, 0x21},
209 {0x5e9, 0x30},
210 {0x5ea, 0x0},
211 {0x5eb, 0xa5},
212 {0x5ec, 0xff},
213 {0x5fe, 2},
214 };
215
216 static const struct rj54n1_reg_val bank_7[] = {
217 {0x70a, 0},
218 {0x714, 0xff},
219 {0x715, 0xff},
220 {0x716, 0x1f},
221 {0x7FE, 2},
222 };
223
224 static const struct rj54n1_reg_val bank_8[] = {
225 {0x800, 0x00},
226 {0x801, 0x01},
227 {0x802, 0x61},
228 {0x805, 0x00},
229 {0x806, 0x00},
230 {0x807, 0x00},
231 {0x808, 0x00},
232 {0x809, 0x01},
233 {0x80A, 0x61},
234 {0x80B, 0x00},
235 {0x80C, 0x01},
236 {0x80D, 0x00},
237 {0x80E, 0x00},
238 {0x80F, 0x00},
239 {0x810, 0x00},
240 {0x811, 0x01},
241 {0x812, 0x61},
242 {0x813, 0x00},
243 {0x814, 0x11},
244 {0x815, 0x00},
245 {0x816, 0x41},
246 {0x817, 0x00},
247 {0x818, 0x51},
248 {0x819, 0x01},
249 {0x81A, 0x1F},
250 {0x81B, 0x00},
251 {0x81C, 0x01},
252 {0x81D, 0x00},
253 {0x81E, 0x11},
254 {0x81F, 0x00},
255 {0x820, 0x41},
256 {0x821, 0x00},
257 {0x822, 0x51},
258 {0x823, 0x00},
259 {0x824, 0x00},
260 {0x825, 0x00},
261 {0x826, 0x47},
262 {0x827, 0x01},
263 {0x828, 0x4F},
264 {0x829, 0x00},
265 {0x82A, 0x00},
266 {0x82B, 0x00},
267 {0x82C, 0x30},
268 {0x82D, 0x00},
269 {0x82E, 0x40},
270 {0x82F, 0x00},
271 {0x830, 0xB3},
272 {0x831, 0x00},
273 {0x832, 0xE3},
274 {0x833, 0x00},
275 {0x834, 0x00},
276 {0x835, 0x00},
277 {0x836, 0x00},
278 {0x837, 0x00},
279 {0x838, 0x00},
280 {0x839, 0x01},
281 {0x83A, 0x61},
282 {0x83B, 0x00},
283 {0x83C, 0x01},
284 {0x83D, 0x00},
285 {0x83E, 0x00},
286 {0x83F, 0x00},
287 {0x840, 0x00},
288 {0x841, 0x01},
289 {0x842, 0x61},
290 {0x843, 0x00},
291 {0x844, 0x1D},
292 {0x845, 0x00},
293 {0x846, 0x00},
294 {0x847, 0x00},
295 {0x848, 0x00},
296 {0x849, 0x01},
297 {0x84A, 0x1F},
298 {0x84B, 0x00},
299 {0x84C, 0x05},
300 {0x84D, 0x00},
301 {0x84E, 0x19},
302 {0x84F, 0x01},
303 {0x850, 0x21},
304 {0x851, 0x01},
305 {0x852, 0x5D},
306 {0x853, 0x00},
307 {0x854, 0x00},
308 {0x855, 0x00},
309 {0x856, 0x19},
310 {0x857, 0x01},
311 {0x858, 0x21},
312 {0x859, 0x00},
313 {0x85A, 0x00},
314 {0x85B, 0x00},
315 {0x85C, 0x00},
316 {0x85D, 0x00},
317 {0x85E, 0x00},
318 {0x85F, 0x00},
319 {0x860, 0xB3},
320 {0x861, 0x00},
321 {0x862, 0xE3},
322 {0x863, 0x00},
323 {0x864, 0x00},
324 {0x865, 0x00},
325 {0x866, 0x00},
326 {0x867, 0x00},
327 {0x868, 0x00},
328 {0x869, 0xE2},
329 {0x86A, 0x00},
330 {0x86B, 0x01},
331 {0x86C, 0x06},
332 {0x86D, 0x00},
333 {0x86E, 0x00},
334 {0x86F, 0x00},
335 {0x870, 0x60},
336 {0x871, 0x8C},
337 {0x872, 0x10},
338 {0x873, 0x00},
339 {0x874, 0xE0},
340 {0x875, 0x00},
341 {0x876, 0x27},
342 {0x877, 0x01},
343 {0x878, 0x00},
344 {0x879, 0x00},
345 {0x87A, 0x00},
346 {0x87B, 0x03},
347 {0x87C, 0x00},
348 {0x87D, 0x00},
349 {0x87E, 0x00},
350 {0x87F, 0x00},
351 {0x880, 0x00},
352 {0x881, 0x00},
353 {0x882, 0x00},
354 {0x883, 0x00},
355 {0x884, 0x00},
356 {0x885, 0x00},
357 {0x886, 0xF8},
358 {0x887, 0x00},
359 {0x888, 0x03},
360 {0x889, 0x00},
361 {0x88A, 0x64},
362 {0x88B, 0x00},
363 {0x88C, 0x03},
364 {0x88D, 0x00},
365 {0x88E, 0xB1},
366 {0x88F, 0x00},
367 {0x890, 0x03},
368 {0x891, 0x01},
369 {0x892, 0x1D},
370 {0x893, 0x00},
371 {0x894, 0x03},
372 {0x895, 0x01},
373 {0x896, 0x4B},
374 {0x897, 0x00},
375 {0x898, 0xE5},
376 {0x899, 0x00},
377 {0x89A, 0x01},
378 {0x89B, 0x00},
379 {0x89C, 0x01},
380 {0x89D, 0x04},
381 {0x89E, 0xC8},
382 {0x89F, 0x00},
383 {0x8A0, 0x01},
384 {0x8A1, 0x01},
385 {0x8A2, 0x61},
386 {0x8A3, 0x00},
387 {0x8A4, 0x01},
388 {0x8A5, 0x00},
389 {0x8A6, 0x00},
390 {0x8A7, 0x00},
391 {0x8A8, 0x00},
392 {0x8A9, 0x00},
393 {0x8AA, 0x7F},
394 {0x8AB, 0x03},
395 {0x8AC, 0x00},
396 {0x8AD, 0x00},
397 {0x8AE, 0x00},
398 {0x8AF, 0x00},
399 {0x8B0, 0x00},
400 {0x8B1, 0x00},
401 {0x8B6, 0x00},
402 {0x8B7, 0x01},
403 {0x8B8, 0x00},
404 {0x8B9, 0x00},
405 {0x8BA, 0x02},
406 {0x8BB, 0x00},
407 {0x8BC, 0xFF},
408 {0x8BD, 0x00},
409 {0x8FE, 2},
410 };
411
412 static const struct rj54n1_reg_val bank_10[] = {
413 {0x10bf, 0x69}
414 };
415
416 /* Clock dividers - these are default register values, divider = register + 1 */
417 static const struct rj54n1_clock_div clk_div = {
418 .ratio_tg = 3 /* default: 5 */,
419 .ratio_t = 4 /* default: 1 */,
420 .ratio_r = 4 /* default: 0 */,
421 .ratio_op = 1 /* default: 5 */,
422 .ratio_o = 9 /* default: 0 */,
423 };
424
425 static struct rj54n1 *to_rj54n1(const struct i2c_client *client)
426 {
427 return container_of(i2c_get_clientdata(client), struct rj54n1, subdev);
428 }
429
430 static int reg_read(struct i2c_client *client, const u16 reg)
431 {
432 struct rj54n1 *rj54n1 = to_rj54n1(client);
433 int ret;
434
435 /* set bank */
436 if (rj54n1->bank != reg >> 8) {
437 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
438 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
439 if (ret < 0)
440 return ret;
441 rj54n1->bank = reg >> 8;
442 }
443 return i2c_smbus_read_byte_data(client, reg & 0xff);
444 }
445
446 static int reg_write(struct i2c_client *client, const u16 reg,
447 const u8 data)
448 {
449 struct rj54n1 *rj54n1 = to_rj54n1(client);
450 int ret;
451
452 /* set bank */
453 if (rj54n1->bank != reg >> 8) {
454 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
455 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
456 if (ret < 0)
457 return ret;
458 rj54n1->bank = reg >> 8;
459 }
460 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", reg & 0xff, data);
461 return i2c_smbus_write_byte_data(client, reg & 0xff, data);
462 }
463
464 static int reg_set(struct i2c_client *client, const u16 reg,
465 const u8 data, const u8 mask)
466 {
467 int ret;
468
469 ret = reg_read(client, reg);
470 if (ret < 0)
471 return ret;
472 return reg_write(client, reg, (ret & ~mask) | (data & mask));
473 }
474
475 static int reg_write_multiple(struct i2c_client *client,
476 const struct rj54n1_reg_val *rv, const int n)
477 {
478 int i, ret;
479
480 for (i = 0; i < n; i++) {
481 ret = reg_write(client, rv->reg, rv->val);
482 if (ret < 0)
483 return ret;
484 rv++;
485 }
486
487 return 0;
488 }
489
490 static int rj54n1_enum_mbus_code(struct v4l2_subdev *sd,
491 struct v4l2_subdev_pad_config *cfg,
492 struct v4l2_subdev_mbus_code_enum *code)
493 {
494 if (code->pad || code->index >= ARRAY_SIZE(rj54n1_colour_fmts))
495 return -EINVAL;
496
497 code->code = rj54n1_colour_fmts[code->index].code;
498 return 0;
499 }
500
501 static int rj54n1_s_stream(struct v4l2_subdev *sd, int enable)
502 {
503 struct i2c_client *client = v4l2_get_subdevdata(sd);
504
505 /* Switch between preview and still shot modes */
506 return reg_set(client, RJ54N1_STILL_CONTROL, (!enable) << 7, 0x80);
507 }
508
509 static int rj54n1_set_rect(struct i2c_client *client,
510 u16 reg_x, u16 reg_y, u16 reg_xy,
511 u32 width, u32 height)
512 {
513 int ret;
514
515 ret = reg_write(client, reg_xy,
516 ((width >> 4) & 0x70) |
517 ((height >> 8) & 7));
518
519 if (!ret)
520 ret = reg_write(client, reg_x, width & 0xff);
521 if (!ret)
522 ret = reg_write(client, reg_y, height & 0xff);
523
524 return ret;
525 }
526
527 /*
528 * Some commands, specifically certain initialisation sequences, require
529 * a commit operation.
530 */
531 static int rj54n1_commit(struct i2c_client *client)
532 {
533 int ret = reg_write(client, RJ54N1_INIT_START, 1);
534 msleep(10);
535 if (!ret)
536 ret = reg_write(client, RJ54N1_INIT_START, 0);
537 return ret;
538 }
539
540 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
541 s32 *out_w, s32 *out_h);
542
543 static int rj54n1_set_selection(struct v4l2_subdev *sd,
544 struct v4l2_subdev_pad_config *cfg,
545 struct v4l2_subdev_selection *sel)
546 {
547 struct i2c_client *client = v4l2_get_subdevdata(sd);
548 struct rj54n1 *rj54n1 = to_rj54n1(client);
549 const struct v4l2_rect *rect = &sel->r;
550 int output_w, output_h, input_w = rect->width, input_h = rect->height;
551 int ret;
552
553 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
554 sel->target != V4L2_SEL_TGT_CROP)
555 return -EINVAL;
556
557 /* arbitrary minimum width and height, edges unimportant */
558 v4l_bound_align_image(&input_w, 8, RJ54N1_MAX_WIDTH, 0,
559 &input_h, 8, RJ54N1_MAX_HEIGHT, 0, 0);
560
561 output_w = (input_w * 1024 + rj54n1->resize / 2) / rj54n1->resize;
562 output_h = (input_h * 1024 + rj54n1->resize / 2) / rj54n1->resize;
563
564 dev_dbg(&client->dev, "Scaling for %dx%d : %u = %dx%d\n",
565 input_w, input_h, rj54n1->resize, output_w, output_h);
566
567 ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
568 if (ret < 0)
569 return ret;
570
571 rj54n1->width = output_w;
572 rj54n1->height = output_h;
573 rj54n1->resize = ret;
574 rj54n1->rect.width = input_w;
575 rj54n1->rect.height = input_h;
576
577 return 0;
578 }
579
580 static int rj54n1_get_selection(struct v4l2_subdev *sd,
581 struct v4l2_subdev_pad_config *cfg,
582 struct v4l2_subdev_selection *sel)
583 {
584 struct i2c_client *client = v4l2_get_subdevdata(sd);
585 struct rj54n1 *rj54n1 = to_rj54n1(client);
586
587 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
588 return -EINVAL;
589
590 switch (sel->target) {
591 case V4L2_SEL_TGT_CROP_BOUNDS:
592 case V4L2_SEL_TGT_CROP_DEFAULT:
593 sel->r.left = RJ54N1_COLUMN_SKIP;
594 sel->r.top = RJ54N1_ROW_SKIP;
595 sel->r.width = RJ54N1_MAX_WIDTH;
596 sel->r.height = RJ54N1_MAX_HEIGHT;
597 return 0;
598 case V4L2_SEL_TGT_CROP:
599 sel->r = rj54n1->rect;
600 return 0;
601 default:
602 return -EINVAL;
603 }
604 }
605
606 static int rj54n1_get_fmt(struct v4l2_subdev *sd,
607 struct v4l2_subdev_pad_config *cfg,
608 struct v4l2_subdev_format *format)
609 {
610 struct v4l2_mbus_framefmt *mf = &format->format;
611 struct i2c_client *client = v4l2_get_subdevdata(sd);
612 struct rj54n1 *rj54n1 = to_rj54n1(client);
613
614 if (format->pad)
615 return -EINVAL;
616
617 mf->code = rj54n1->fmt->code;
618 mf->colorspace = rj54n1->fmt->colorspace;
619 mf->ycbcr_enc = V4L2_YCBCR_ENC_601;
620 mf->xfer_func = V4L2_XFER_FUNC_SRGB;
621 mf->quantization = V4L2_QUANTIZATION_DEFAULT;
622 mf->field = V4L2_FIELD_NONE;
623 mf->width = rj54n1->width;
624 mf->height = rj54n1->height;
625
626 return 0;
627 }
628
629 /*
630 * The actual geometry configuration routine. It scales the input window into
631 * the output one, updates the window sizes and returns an error or the resize
632 * coefficient on success. Note: we only use the "Fixed Scaling" on this camera.
633 */
634 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
635 s32 *out_w, s32 *out_h)
636 {
637 struct i2c_client *client = v4l2_get_subdevdata(sd);
638 struct rj54n1 *rj54n1 = to_rj54n1(client);
639 unsigned int skip, resize, input_w = *in_w, input_h = *in_h,
640 output_w = *out_w, output_h = *out_h;
641 u16 inc_sel, wb_bit8, wb_left, wb_right, wb_top, wb_bottom;
642 unsigned int peak, peak_50, peak_60;
643 int ret;
644
645 /*
646 * We have a problem with crops, where the window is larger than 512x384
647 * and output window is larger than a half of the input one. In this
648 * case we have to either reduce the input window to equal or below
649 * 512x384 or the output window to equal or below 1/2 of the input.
650 */
651 if (output_w > max(512U, input_w / 2)) {
652 if (2 * output_w > RJ54N1_MAX_WIDTH) {
653 input_w = RJ54N1_MAX_WIDTH;
654 output_w = RJ54N1_MAX_WIDTH / 2;
655 } else {
656 input_w = output_w * 2;
657 }
658
659 dev_dbg(&client->dev, "Adjusted output width: in %u, out %u\n",
660 input_w, output_w);
661 }
662
663 if (output_h > max(384U, input_h / 2)) {
664 if (2 * output_h > RJ54N1_MAX_HEIGHT) {
665 input_h = RJ54N1_MAX_HEIGHT;
666 output_h = RJ54N1_MAX_HEIGHT / 2;
667 } else {
668 input_h = output_h * 2;
669 }
670
671 dev_dbg(&client->dev, "Adjusted output height: in %u, out %u\n",
672 input_h, output_h);
673 }
674
675 /* Idea: use the read mode for snapshots, handle separate geometries */
676 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_S_L,
677 RJ54N1_Y_OUTPUT_SIZE_S_L,
678 RJ54N1_XY_OUTPUT_SIZE_S_H, output_w, output_h);
679 if (!ret)
680 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_P_L,
681 RJ54N1_Y_OUTPUT_SIZE_P_L,
682 RJ54N1_XY_OUTPUT_SIZE_P_H, output_w, output_h);
683
684 if (ret < 0)
685 return ret;
686
687 if (output_w > input_w && output_h > input_h) {
688 input_w = output_w;
689 input_h = output_h;
690
691 resize = 1024;
692 } else {
693 unsigned int resize_x, resize_y;
694 resize_x = (input_w * 1024 + output_w / 2) / output_w;
695 resize_y = (input_h * 1024 + output_h / 2) / output_h;
696
697 /* We want max(resize_x, resize_y), check if it still fits */
698 if (resize_x > resize_y &&
699 (output_h * resize_x + 512) / 1024 > RJ54N1_MAX_HEIGHT)
700 resize = (RJ54N1_MAX_HEIGHT * 1024 + output_h / 2) /
701 output_h;
702 else if (resize_y > resize_x &&
703 (output_w * resize_y + 512) / 1024 > RJ54N1_MAX_WIDTH)
704 resize = (RJ54N1_MAX_WIDTH * 1024 + output_w / 2) /
705 output_w;
706 else
707 resize = max(resize_x, resize_y);
708
709 /* Prohibited value ranges */
710 switch (resize) {
711 case 2040 ... 2047:
712 resize = 2039;
713 break;
714 case 4080 ... 4095:
715 resize = 4079;
716 break;
717 case 8160 ... 8191:
718 resize = 8159;
719 break;
720 case 16320 ... 16384:
721 resize = 16319;
722 }
723 }
724
725 /* Set scaling */
726 ret = reg_write(client, RJ54N1_RESIZE_HOLD_L, resize & 0xff);
727 if (!ret)
728 ret = reg_write(client, RJ54N1_RESIZE_HOLD_H, resize >> 8);
729
730 if (ret < 0)
731 return ret;
732
733 /*
734 * Configure a skipping bitmask. The sensor will select a skipping value
735 * among set bits automatically. This is very unclear in the datasheet
736 * too. I was told, in this register one enables all skipping values,
737 * that are required for a specific resize, and the camera selects
738 * automatically, which ones to use. But it is unclear how to identify,
739 * which cropping values are needed. Secondly, why don't we just set all
740 * bits and let the camera choose? Would it increase processing time and
741 * reduce the framerate? Using 0xfffc for INC_USE_SEL doesn't seem to
742 * improve the image quality or stability for larger frames (see comment
743 * above), but I didn't check the framerate.
744 */
745 skip = min(resize / 1024, 15U);
746
747 inc_sel = 1 << skip;
748
749 if (inc_sel <= 2)
750 inc_sel = 0xc;
751 else if (resize & 1023 && skip < 15)
752 inc_sel |= 1 << (skip + 1);
753
754 ret = reg_write(client, RJ54N1_INC_USE_SEL_L, inc_sel & 0xfc);
755 if (!ret)
756 ret = reg_write(client, RJ54N1_INC_USE_SEL_H, inc_sel >> 8);
757
758 if (!rj54n1->auto_wb) {
759 /* Auto white balance window */
760 wb_left = output_w / 16;
761 wb_right = (3 * output_w / 4 - 3) / 4;
762 wb_top = output_h / 16;
763 wb_bottom = (3 * output_h / 4 - 3) / 4;
764 wb_bit8 = ((wb_left >> 2) & 0x40) | ((wb_top >> 4) & 0x10) |
765 ((wb_right >> 6) & 4) | ((wb_bottom >> 8) & 1);
766
767 if (!ret)
768 ret = reg_write(client, RJ54N1_BIT8_WB, wb_bit8);
769 if (!ret)
770 ret = reg_write(client, RJ54N1_HCAPS_WB, wb_left);
771 if (!ret)
772 ret = reg_write(client, RJ54N1_VCAPS_WB, wb_top);
773 if (!ret)
774 ret = reg_write(client, RJ54N1_HCAPE_WB, wb_right);
775 if (!ret)
776 ret = reg_write(client, RJ54N1_VCAPE_WB, wb_bottom);
777 }
778
779 /* Antiflicker */
780 peak = 12 * RJ54N1_MAX_WIDTH * (1 << 14) * resize / rj54n1->tgclk_mhz /
781 10000;
782 peak_50 = peak / 6;
783 peak_60 = peak / 5;
784
785 if (!ret)
786 ret = reg_write(client, RJ54N1_PEAK_H,
787 ((peak_50 >> 4) & 0xf0) | (peak_60 >> 8));
788 if (!ret)
789 ret = reg_write(client, RJ54N1_PEAK_50, peak_50);
790 if (!ret)
791 ret = reg_write(client, RJ54N1_PEAK_60, peak_60);
792 if (!ret)
793 ret = reg_write(client, RJ54N1_PEAK_DIFF, peak / 150);
794
795 /* Start resizing */
796 if (!ret)
797 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
798 RESIZE_HOLD_SEL | RESIZE_GO | 1);
799
800 if (ret < 0)
801 return ret;
802
803 /* Constant taken from manufacturer's example */
804 msleep(230);
805
806 ret = reg_write(client, RJ54N1_RESIZE_CONTROL, RESIZE_HOLD_SEL | 1);
807 if (ret < 0)
808 return ret;
809
810 *in_w = (output_w * resize + 512) / 1024;
811 *in_h = (output_h * resize + 512) / 1024;
812 *out_w = output_w;
813 *out_h = output_h;
814
815 dev_dbg(&client->dev, "Scaled for %dx%d : %u = %ux%u, skip %u\n",
816 *in_w, *in_h, resize, output_w, output_h, skip);
817
818 return resize;
819 }
820
821 static int rj54n1_set_clock(struct i2c_client *client)
822 {
823 struct rj54n1 *rj54n1 = to_rj54n1(client);
824 int ret;
825
826 /* Enable external clock */
827 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK | SOFT_STDBY);
828 /* Leave stand-by. Note: use this when implementing suspend / resume */
829 if (!ret)
830 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK);
831
832 if (!ret)
833 ret = reg_write(client, RJ54N1_PLL_L, PLL_L);
834 if (!ret)
835 ret = reg_write(client, RJ54N1_PLL_N, PLL_N);
836
837 /* TGCLK dividers */
838 if (!ret)
839 ret = reg_write(client, RJ54N1_RATIO_TG,
840 rj54n1->clk_div.ratio_tg);
841 if (!ret)
842 ret = reg_write(client, RJ54N1_RATIO_T,
843 rj54n1->clk_div.ratio_t);
844 if (!ret)
845 ret = reg_write(client, RJ54N1_RATIO_R,
846 rj54n1->clk_div.ratio_r);
847
848 /* Enable TGCLK & RAMP */
849 if (!ret)
850 ret = reg_write(client, RJ54N1_RAMP_TGCLK_EN, 3);
851
852 /* Disable clock output */
853 if (!ret)
854 ret = reg_write(client, RJ54N1_OCLK_DSP, 0);
855
856 /* Set divisors */
857 if (!ret)
858 ret = reg_write(client, RJ54N1_RATIO_OP,
859 rj54n1->clk_div.ratio_op);
860 if (!ret)
861 ret = reg_write(client, RJ54N1_RATIO_O,
862 rj54n1->clk_div.ratio_o);
863
864 /* Enable OCLK */
865 if (!ret)
866 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
867
868 /* Use PLL for Timing Generator, write 2 to reserved bits */
869 if (!ret)
870 ret = reg_write(client, RJ54N1_TG_BYPASS, 2);
871
872 /* Take sensor out of reset */
873 if (!ret)
874 ret = reg_write(client, RJ54N1_RESET_STANDBY,
875 E_EXCLK | SEN_RSTX);
876 /* Enable PLL */
877 if (!ret)
878 ret = reg_write(client, RJ54N1_PLL_EN, 1);
879
880 /* Wait for PLL to stabilise */
881 msleep(10);
882
883 /* Enable clock to frequency divider */
884 if (!ret)
885 ret = reg_write(client, RJ54N1_CLK_RST, 1);
886
887 if (!ret)
888 ret = reg_read(client, RJ54N1_CLK_RST);
889 if (ret != 1) {
890 dev_err(&client->dev,
891 "Resetting RJ54N1CB0C clock failed: %d!\n", ret);
892 return -EIO;
893 }
894
895 /* Start the PLL */
896 ret = reg_set(client, RJ54N1_OCLK_DSP, 1, 1);
897
898 /* Enable OCLK */
899 if (!ret)
900 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
901
902 return ret;
903 }
904
905 static int rj54n1_reg_init(struct i2c_client *client)
906 {
907 struct rj54n1 *rj54n1 = to_rj54n1(client);
908 int ret = rj54n1_set_clock(client);
909
910 if (!ret)
911 ret = reg_write_multiple(client, bank_7, ARRAY_SIZE(bank_7));
912 if (!ret)
913 ret = reg_write_multiple(client, bank_10, ARRAY_SIZE(bank_10));
914
915 /* Set binning divisors */
916 if (!ret)
917 ret = reg_write(client, RJ54N1_SCALE_1_2_LEV, 3 | (7 << 4));
918 if (!ret)
919 ret = reg_write(client, RJ54N1_SCALE_4_LEV, 0xf);
920
921 /* Switch to fixed resize mode */
922 if (!ret)
923 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
924 RESIZE_HOLD_SEL | 1);
925
926 /* Set gain */
927 if (!ret)
928 ret = reg_write(client, RJ54N1_Y_GAIN, 0x84);
929
930 /*
931 * Mirror the image back: default is upside down and left-to-right...
932 * Set manual preview / still shot switching
933 */
934 if (!ret)
935 ret = reg_write(client, RJ54N1_MIRROR_STILL_MODE, 0x27);
936
937 if (!ret)
938 ret = reg_write_multiple(client, bank_4, ARRAY_SIZE(bank_4));
939
940 /* Auto exposure area */
941 if (!ret)
942 ret = reg_write(client, RJ54N1_EXPOSURE_CONTROL, 0x80);
943 /* Check current auto WB config */
944 if (!ret)
945 ret = reg_read(client, RJ54N1_WB_SEL_WEIGHT_I);
946 if (ret >= 0) {
947 rj54n1->auto_wb = ret & 0x80;
948 ret = reg_write_multiple(client, bank_5, ARRAY_SIZE(bank_5));
949 }
950 if (!ret)
951 ret = reg_write_multiple(client, bank_8, ARRAY_SIZE(bank_8));
952
953 if (!ret)
954 ret = reg_write(client, RJ54N1_RESET_STANDBY,
955 E_EXCLK | DSP_RSTX | SEN_RSTX);
956
957 /* Commit init */
958 if (!ret)
959 ret = rj54n1_commit(client);
960
961 /* Take DSP, TG, sensor out of reset */
962 if (!ret)
963 ret = reg_write(client, RJ54N1_RESET_STANDBY,
964 E_EXCLK | DSP_RSTX | TG_RSTX | SEN_RSTX);
965
966 /* Start register update? Same register as 0x?FE in many bank_* sets */
967 if (!ret)
968 ret = reg_write(client, RJ54N1_FWFLG, 2);
969
970 /* Constant taken from manufacturer's example */
971 msleep(700);
972
973 return ret;
974 }
975
976 static int rj54n1_set_fmt(struct v4l2_subdev *sd,
977 struct v4l2_subdev_pad_config *cfg,
978 struct v4l2_subdev_format *format)
979 {
980 struct v4l2_mbus_framefmt *mf = &format->format;
981 struct i2c_client *client = v4l2_get_subdevdata(sd);
982 struct rj54n1 *rj54n1 = to_rj54n1(client);
983 const struct rj54n1_datafmt *fmt;
984 int output_w, output_h, max_w, max_h,
985 input_w = rj54n1->rect.width, input_h = rj54n1->rect.height;
986 int align = mf->code == MEDIA_BUS_FMT_SBGGR10_1X10 ||
987 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE ||
988 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE ||
989 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE ||
990 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE;
991 int ret;
992
993 if (format->pad)
994 return -EINVAL;
995
996 dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
997 __func__, mf->code, mf->width, mf->height);
998
999 fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
1000 ARRAY_SIZE(rj54n1_colour_fmts));
1001 if (!fmt) {
1002 fmt = rj54n1->fmt;
1003 mf->code = fmt->code;
1004 }
1005
1006 mf->field = V4L2_FIELD_NONE;
1007 mf->colorspace = fmt->colorspace;
1008
1009 v4l_bound_align_image(&mf->width, 112, RJ54N1_MAX_WIDTH, align,
1010 &mf->height, 84, RJ54N1_MAX_HEIGHT, align, 0);
1011
1012 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
1013 cfg->try_fmt = *mf;
1014 return 0;
1015 }
1016
1017 /*
1018 * Verify if the sensor has just been powered on. TODO: replace this
1019 * with proper PM, when a suitable API is available.
1020 */
1021 ret = reg_read(client, RJ54N1_RESET_STANDBY);
1022 if (ret < 0)
1023 return ret;
1024
1025 if (!(ret & E_EXCLK)) {
1026 ret = rj54n1_reg_init(client);
1027 if (ret < 0)
1028 return ret;
1029 }
1030
1031 /* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */
1032 switch (mf->code) {
1033 case MEDIA_BUS_FMT_YUYV8_2X8:
1034 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1035 if (!ret)
1036 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1037 break;
1038 case MEDIA_BUS_FMT_YVYU8_2X8:
1039 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1040 if (!ret)
1041 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1042 break;
1043 case MEDIA_BUS_FMT_RGB565_2X8_LE:
1044 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1045 if (!ret)
1046 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1047 break;
1048 case MEDIA_BUS_FMT_RGB565_2X8_BE:
1049 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1050 if (!ret)
1051 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1052 break;
1053 case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE:
1054 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1055 if (!ret)
1056 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1057 if (!ret)
1058 ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1059 break;
1060 case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE:
1061 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1062 if (!ret)
1063 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1064 if (!ret)
1065 ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1066 break;
1067 case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE:
1068 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1069 if (!ret)
1070 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1071 if (!ret)
1072 ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1073 break;
1074 case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE:
1075 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1076 if (!ret)
1077 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1078 if (!ret)
1079 ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1080 break;
1081 case MEDIA_BUS_FMT_SBGGR10_1X10:
1082 ret = reg_write(client, RJ54N1_OUT_SEL, 5);
1083 break;
1084 default:
1085 ret = -EINVAL;
1086 }
1087
1088 /* Special case: a raw mode with 10 bits of data per clock tick */
1089 if (!ret)
1090 ret = reg_set(client, RJ54N1_OCLK_SEL_EN,
1091 (mf->code == MEDIA_BUS_FMT_SBGGR10_1X10) << 1, 2);
1092
1093 if (ret < 0)
1094 return ret;
1095
1096 /* Supported scales 1:1 >= scale > 1:16 */
1097 max_w = mf->width * (16 * 1024 - 1) / 1024;
1098 if (input_w > max_w)
1099 input_w = max_w;
1100 max_h = mf->height * (16 * 1024 - 1) / 1024;
1101 if (input_h > max_h)
1102 input_h = max_h;
1103
1104 output_w = mf->width;
1105 output_h = mf->height;
1106
1107 ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
1108 if (ret < 0)
1109 return ret;
1110
1111 fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
1112 ARRAY_SIZE(rj54n1_colour_fmts));
1113
1114 rj54n1->fmt = fmt;
1115 rj54n1->resize = ret;
1116 rj54n1->rect.width = input_w;
1117 rj54n1->rect.height = input_h;
1118 rj54n1->width = output_w;
1119 rj54n1->height = output_h;
1120
1121 mf->width = output_w;
1122 mf->height = output_h;
1123 mf->field = V4L2_FIELD_NONE;
1124 mf->colorspace = fmt->colorspace;
1125
1126 return 0;
1127 }
1128
1129 #ifdef CONFIG_VIDEO_ADV_DEBUG
1130 static int rj54n1_g_register(struct v4l2_subdev *sd,
1131 struct v4l2_dbg_register *reg)
1132 {
1133 struct i2c_client *client = v4l2_get_subdevdata(sd);
1134
1135 if (reg->reg < 0x400 || reg->reg > 0x1fff)
1136 /* Registers > 0x0800 are only available from Sharp support */
1137 return -EINVAL;
1138
1139 reg->size = 1;
1140 reg->val = reg_read(client, reg->reg);
1141
1142 if (reg->val > 0xff)
1143 return -EIO;
1144
1145 return 0;
1146 }
1147
1148 static int rj54n1_s_register(struct v4l2_subdev *sd,
1149 const struct v4l2_dbg_register *reg)
1150 {
1151 struct i2c_client *client = v4l2_get_subdevdata(sd);
1152
1153 if (reg->reg < 0x400 || reg->reg > 0x1fff)
1154 /* Registers >= 0x0800 are only available from Sharp support */
1155 return -EINVAL;
1156
1157 if (reg_write(client, reg->reg, reg->val) < 0)
1158 return -EIO;
1159
1160 return 0;
1161 }
1162 #endif
1163
1164 static int rj54n1_s_power(struct v4l2_subdev *sd, int on)
1165 {
1166 struct i2c_client *client = v4l2_get_subdevdata(sd);
1167 struct rj54n1 *rj54n1 = to_rj54n1(client);
1168
1169 if (on) {
1170 if (rj54n1->pwup_gpio)
1171 gpiod_set_value(rj54n1->pwup_gpio, 1);
1172 if (rj54n1->enable_gpio)
1173 gpiod_set_value(rj54n1->enable_gpio, 1);
1174
1175 msleep(1);
1176
1177 return clk_prepare_enable(rj54n1->clk);
1178 }
1179
1180 clk_disable_unprepare(rj54n1->clk);
1181
1182 if (rj54n1->enable_gpio)
1183 gpiod_set_value(rj54n1->enable_gpio, 0);
1184 if (rj54n1->pwup_gpio)
1185 gpiod_set_value(rj54n1->pwup_gpio, 0);
1186
1187 return 0;
1188 }
1189
1190 static int rj54n1_s_ctrl(struct v4l2_ctrl *ctrl)
1191 {
1192 struct rj54n1 *rj54n1 = container_of(ctrl->handler, struct rj54n1, hdl);
1193 struct v4l2_subdev *sd = &rj54n1->subdev;
1194 struct i2c_client *client = v4l2_get_subdevdata(sd);
1195 int data;
1196
1197 switch (ctrl->id) {
1198 case V4L2_CID_VFLIP:
1199 if (ctrl->val)
1200 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 1);
1201 else
1202 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 1, 1);
1203 if (data < 0)
1204 return -EIO;
1205 return 0;
1206 case V4L2_CID_HFLIP:
1207 if (ctrl->val)
1208 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 2);
1209 else
1210 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 2, 2);
1211 if (data < 0)
1212 return -EIO;
1213 return 0;
1214 case V4L2_CID_GAIN:
1215 if (reg_write(client, RJ54N1_Y_GAIN, ctrl->val * 2) < 0)
1216 return -EIO;
1217 return 0;
1218 case V4L2_CID_AUTO_WHITE_BALANCE:
1219 /* Auto WB area - whole image */
1220 if (reg_set(client, RJ54N1_WB_SEL_WEIGHT_I, ctrl->val << 7,
1221 0x80) < 0)
1222 return -EIO;
1223 rj54n1->auto_wb = ctrl->val;
1224 return 0;
1225 }
1226
1227 return -EINVAL;
1228 }
1229
1230 static const struct v4l2_ctrl_ops rj54n1_ctrl_ops = {
1231 .s_ctrl = rj54n1_s_ctrl,
1232 };
1233
1234 static const struct v4l2_subdev_core_ops rj54n1_subdev_core_ops = {
1235 #ifdef CONFIG_VIDEO_ADV_DEBUG
1236 .g_register = rj54n1_g_register,
1237 .s_register = rj54n1_s_register,
1238 #endif
1239 .s_power = rj54n1_s_power,
1240 };
1241
1242 static const struct v4l2_subdev_video_ops rj54n1_subdev_video_ops = {
1243 .s_stream = rj54n1_s_stream,
1244 };
1245
1246 static const struct v4l2_subdev_pad_ops rj54n1_subdev_pad_ops = {
1247 .enum_mbus_code = rj54n1_enum_mbus_code,
1248 .get_selection = rj54n1_get_selection,
1249 .set_selection = rj54n1_set_selection,
1250 .get_fmt = rj54n1_get_fmt,
1251 .set_fmt = rj54n1_set_fmt,
1252 };
1253
1254 static const struct v4l2_subdev_ops rj54n1_subdev_ops = {
1255 .core = &rj54n1_subdev_core_ops,
1256 .video = &rj54n1_subdev_video_ops,
1257 .pad = &rj54n1_subdev_pad_ops,
1258 };
1259
1260 /*
1261 * Interface active, can use i2c. If it fails, it can indeed mean, that
1262 * this wasn't our capture interface, so, we wait for the right one
1263 */
1264 static int rj54n1_video_probe(struct i2c_client *client,
1265 struct rj54n1_pdata *priv)
1266 {
1267 struct rj54n1 *rj54n1 = to_rj54n1(client);
1268 int data1, data2;
1269 int ret;
1270
1271 ret = rj54n1_s_power(&rj54n1->subdev, 1);
1272 if (ret < 0)
1273 return ret;
1274
1275 /* Read out the chip version register */
1276 data1 = reg_read(client, RJ54N1_DEV_CODE);
1277 data2 = reg_read(client, RJ54N1_DEV_CODE2);
1278
1279 if (data1 != 0x51 || data2 != 0x10) {
1280 ret = -ENODEV;
1281 dev_info(&client->dev, "No RJ54N1CB0C found, read 0x%x:0x%x\n",
1282 data1, data2);
1283 goto done;
1284 }
1285
1286 /* Configure IOCTL polarity from the platform data: 0 or 1 << 7. */
1287 ret = reg_write(client, RJ54N1_IOC, priv->ioctl_high << 7);
1288 if (ret < 0)
1289 goto done;
1290
1291 dev_info(&client->dev, "Detected a RJ54N1CB0C chip ID 0x%x:0x%x\n",
1292 data1, data2);
1293
1294 ret = v4l2_ctrl_handler_setup(&rj54n1->hdl);
1295
1296 done:
1297 rj54n1_s_power(&rj54n1->subdev, 0);
1298 return ret;
1299 }
1300
1301 static int rj54n1_probe(struct i2c_client *client,
1302 const struct i2c_device_id *did)
1303 {
1304 struct rj54n1 *rj54n1;
1305 struct i2c_adapter *adapter = client->adapter;
1306 struct rj54n1_pdata *rj54n1_priv;
1307 int ret;
1308
1309 if (!client->dev.platform_data) {
1310 dev_err(&client->dev, "RJ54N1CB0C: missing platform data!\n");
1311 return -EINVAL;
1312 }
1313
1314 rj54n1_priv = client->dev.platform_data;
1315
1316 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1317 dev_warn(&adapter->dev,
1318 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
1319 return -EIO;
1320 }
1321
1322 rj54n1 = devm_kzalloc(&client->dev, sizeof(struct rj54n1), GFP_KERNEL);
1323 if (!rj54n1)
1324 return -ENOMEM;
1325
1326 v4l2_i2c_subdev_init(&rj54n1->subdev, client, &rj54n1_subdev_ops);
1327 v4l2_ctrl_handler_init(&rj54n1->hdl, 4);
1328 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1329 V4L2_CID_VFLIP, 0, 1, 1, 0);
1330 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1331 V4L2_CID_HFLIP, 0, 1, 1, 0);
1332 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1333 V4L2_CID_GAIN, 0, 127, 1, 66);
1334 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1335 V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1336 rj54n1->subdev.ctrl_handler = &rj54n1->hdl;
1337 if (rj54n1->hdl.error)
1338 return rj54n1->hdl.error;
1339
1340 rj54n1->clk_div = clk_div;
1341 rj54n1->rect.left = RJ54N1_COLUMN_SKIP;
1342 rj54n1->rect.top = RJ54N1_ROW_SKIP;
1343 rj54n1->rect.width = RJ54N1_MAX_WIDTH;
1344 rj54n1->rect.height = RJ54N1_MAX_HEIGHT;
1345 rj54n1->width = RJ54N1_MAX_WIDTH;
1346 rj54n1->height = RJ54N1_MAX_HEIGHT;
1347 rj54n1->fmt = &rj54n1_colour_fmts[0];
1348 rj54n1->resize = 1024;
1349 rj54n1->tgclk_mhz = (rj54n1_priv->mclk_freq / PLL_L * PLL_N) /
1350 (clk_div.ratio_tg + 1) / (clk_div.ratio_t + 1);
1351
1352 rj54n1->clk = clk_get(&client->dev, NULL);
1353 if (IS_ERR(rj54n1->clk)) {
1354 ret = PTR_ERR(rj54n1->clk);
1355 goto err_free_ctrl;
1356 }
1357
1358 rj54n1->pwup_gpio = gpiod_get_optional(&client->dev, "powerup",
1359 GPIOD_OUT_LOW);
1360 if (IS_ERR(rj54n1->pwup_gpio)) {
1361 dev_info(&client->dev, "Unable to get GPIO \"powerup\": %ld\n",
1362 PTR_ERR(rj54n1->pwup_gpio));
1363 ret = PTR_ERR(rj54n1->pwup_gpio);
1364 goto err_clk_put;
1365 }
1366
1367 rj54n1->enable_gpio = gpiod_get_optional(&client->dev, "enable",
1368 GPIOD_OUT_LOW);
1369 if (IS_ERR(rj54n1->enable_gpio)) {
1370 dev_info(&client->dev, "Unable to get GPIO \"enable\": %ld\n",
1371 PTR_ERR(rj54n1->enable_gpio));
1372 ret = PTR_ERR(rj54n1->enable_gpio);
1373 goto err_gpio_put;
1374 }
1375
1376 ret = rj54n1_video_probe(client, rj54n1_priv);
1377 if (ret < 0)
1378 goto err_gpio_put;
1379
1380 ret = v4l2_async_register_subdev(&rj54n1->subdev);
1381 if (ret)
1382 goto err_gpio_put;
1383
1384 return 0;
1385
1386 err_gpio_put:
1387 if (rj54n1->enable_gpio)
1388 gpiod_put(rj54n1->enable_gpio);
1389
1390 if (rj54n1->pwup_gpio)
1391 gpiod_put(rj54n1->pwup_gpio);
1392
1393 err_clk_put:
1394 clk_put(rj54n1->clk);
1395
1396 err_free_ctrl:
1397 v4l2_ctrl_handler_free(&rj54n1->hdl);
1398
1399 return ret;
1400 }
1401
1402 static int rj54n1_remove(struct i2c_client *client)
1403 {
1404 struct rj54n1 *rj54n1 = to_rj54n1(client);
1405
1406 if (rj54n1->enable_gpio)
1407 gpiod_put(rj54n1->enable_gpio);
1408 if (rj54n1->pwup_gpio)
1409 gpiod_put(rj54n1->pwup_gpio);
1410
1411 clk_put(rj54n1->clk);
1412 v4l2_ctrl_handler_free(&rj54n1->hdl);
1413 v4l2_async_unregister_subdev(&rj54n1->subdev);
1414
1415 return 0;
1416 }
1417
1418 static const struct i2c_device_id rj54n1_id[] = {
1419 { "rj54n1cb0c", 0 },
1420 { }
1421 };
1422 MODULE_DEVICE_TABLE(i2c, rj54n1_id);
1423
1424 static struct i2c_driver rj54n1_i2c_driver = {
1425 .driver = {
1426 .name = "rj54n1cb0c",
1427 },
1428 .probe = rj54n1_probe,
1429 .remove = rj54n1_remove,
1430 .id_table = rj54n1_id,
1431 };
1432
1433 module_i2c_driver(rj54n1_i2c_driver);
1434
1435 MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver");
1436 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1437 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support