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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / media / i2c / soc_camera / rj54n1cb0c.c
blob7e6d978478747641f56e5b66106bcc915e756671
1 /*
2 * Driver for RJ54N1CB0C CMOS Image Sensor from Sharp
3 *
4 * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <linux/delay.h>
12 #include <linux/i2c.h>
13 #include <linux/slab.h>
14 #include <linux/v4l2-mediabus.h>
15 #include <linux/videodev2.h>
16 #include <linux/module.h>
17
18 #include <media/rj54n1cb0c.h>
19 #include <media/soc_camera.h>
20 #include <media/v4l2-clk.h>
21 #include <media/v4l2-subdev.h>
22 #include <media/v4l2-ctrls.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 enum v4l2_mbus_pixelcode 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 enum v4l2_mbus_pixelcode 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 {V4L2_MBUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG},
133 {V4L2_MBUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG},
134 {V4L2_MBUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB},
135 {V4L2_MBUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB},
136 {V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB},
137 {V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE, V4L2_COLORSPACE_SRGB},
138 {V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE, V4L2_COLORSPACE_SRGB},
139 {V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE, V4L2_COLORSPACE_SRGB},
140 {V4L2_MBUS_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 v4l2_clk *clk;
155 struct rj54n1_clock_div clk_div;
156 const struct rj54n1_datafmt *fmt;
157 struct v4l2_rect rect; /* Sensor window */
158 unsigned int tgclk_mhz;
159 bool auto_wb;
160 unsigned short width; /* Output window */
161 unsigned short height;
162 unsigned short resize; /* Sensor * 1024 / resize = Output */
163 unsigned short scale;
164 u8 bank;
165 };
166
167 struct rj54n1_reg_val {
168 u16 reg;
169 u8 val;
170 };
171
172 static const struct rj54n1_reg_val bank_4[] = {
173 {0x417, 0},
174 {0x42c, 0},
175 {0x42d, 0xf0},
176 {0x42e, 0},
177 {0x42f, 0x50},
178 {0x430, 0xf5},
179 {0x431, 0x16},
180 {0x432, 0x20},
181 {0x433, 0},
182 {0x434, 0xc8},
183 {0x43c, 8},
184 {0x43e, 0x90},
185 {0x445, 0x83},
186 {0x4ba, 0x58},
187 {0x4bb, 4},
188 {0x4bc, 0x20},
189 {0x4db, 4},
190 {0x4fe, 2},
191 };
192
193 static const struct rj54n1_reg_val bank_5[] = {
194 {0x514, 0},
195 {0x516, 0},
196 {0x518, 0},
197 {0x51a, 0},
198 {0x51d, 0xff},
199 {0x56f, 0x28},
200 {0x575, 0x40},
201 {0x5bc, 0x48},
202 {0x5c1, 6},
203 {0x5e5, 0x11},
204 {0x5e6, 0x43},
205 {0x5e7, 0x33},
206 {0x5e8, 0x21},
207 {0x5e9, 0x30},
208 {0x5ea, 0x0},
209 {0x5eb, 0xa5},
210 {0x5ec, 0xff},
211 {0x5fe, 2},
212 };
213
214 static const struct rj54n1_reg_val bank_7[] = {
215 {0x70a, 0},
216 {0x714, 0xff},
217 {0x715, 0xff},
218 {0x716, 0x1f},
219 {0x7FE, 2},
220 };
221
222 static const struct rj54n1_reg_val bank_8[] = {
223 {0x800, 0x00},
224 {0x801, 0x01},
225 {0x802, 0x61},
226 {0x805, 0x00},
227 {0x806, 0x00},
228 {0x807, 0x00},
229 {0x808, 0x00},
230 {0x809, 0x01},
231 {0x80A, 0x61},
232 {0x80B, 0x00},
233 {0x80C, 0x01},
234 {0x80D, 0x00},
235 {0x80E, 0x00},
236 {0x80F, 0x00},
237 {0x810, 0x00},
238 {0x811, 0x01},
239 {0x812, 0x61},
240 {0x813, 0x00},
241 {0x814, 0x11},
242 {0x815, 0x00},
243 {0x816, 0x41},
244 {0x817, 0x00},
245 {0x818, 0x51},
246 {0x819, 0x01},
247 {0x81A, 0x1F},
248 {0x81B, 0x00},
249 {0x81C, 0x01},
250 {0x81D, 0x00},
251 {0x81E, 0x11},
252 {0x81F, 0x00},
253 {0x820, 0x41},
254 {0x821, 0x00},
255 {0x822, 0x51},
256 {0x823, 0x00},
257 {0x824, 0x00},
258 {0x825, 0x00},
259 {0x826, 0x47},
260 {0x827, 0x01},
261 {0x828, 0x4F},
262 {0x829, 0x00},
263 {0x82A, 0x00},
264 {0x82B, 0x00},
265 {0x82C, 0x30},
266 {0x82D, 0x00},
267 {0x82E, 0x40},
268 {0x82F, 0x00},
269 {0x830, 0xB3},
270 {0x831, 0x00},
271 {0x832, 0xE3},
272 {0x833, 0x00},
273 {0x834, 0x00},
274 {0x835, 0x00},
275 {0x836, 0x00},
276 {0x837, 0x00},
277 {0x838, 0x00},
278 {0x839, 0x01},
279 {0x83A, 0x61},
280 {0x83B, 0x00},
281 {0x83C, 0x01},
282 {0x83D, 0x00},
283 {0x83E, 0x00},
284 {0x83F, 0x00},
285 {0x840, 0x00},
286 {0x841, 0x01},
287 {0x842, 0x61},
288 {0x843, 0x00},
289 {0x844, 0x1D},
290 {0x845, 0x00},
291 {0x846, 0x00},
292 {0x847, 0x00},
293 {0x848, 0x00},
294 {0x849, 0x01},
295 {0x84A, 0x1F},
296 {0x84B, 0x00},
297 {0x84C, 0x05},
298 {0x84D, 0x00},
299 {0x84E, 0x19},
300 {0x84F, 0x01},
301 {0x850, 0x21},
302 {0x851, 0x01},
303 {0x852, 0x5D},
304 {0x853, 0x00},
305 {0x854, 0x00},
306 {0x855, 0x00},
307 {0x856, 0x19},
308 {0x857, 0x01},
309 {0x858, 0x21},
310 {0x859, 0x00},
311 {0x85A, 0x00},
312 {0x85B, 0x00},
313 {0x85C, 0x00},
314 {0x85D, 0x00},
315 {0x85E, 0x00},
316 {0x85F, 0x00},
317 {0x860, 0xB3},
318 {0x861, 0x00},
319 {0x862, 0xE3},
320 {0x863, 0x00},
321 {0x864, 0x00},
322 {0x865, 0x00},
323 {0x866, 0x00},
324 {0x867, 0x00},
325 {0x868, 0x00},
326 {0x869, 0xE2},
327 {0x86A, 0x00},
328 {0x86B, 0x01},
329 {0x86C, 0x06},
330 {0x86D, 0x00},
331 {0x86E, 0x00},
332 {0x86F, 0x00},
333 {0x870, 0x60},
334 {0x871, 0x8C},
335 {0x872, 0x10},
336 {0x873, 0x00},
337 {0x874, 0xE0},
338 {0x875, 0x00},
339 {0x876, 0x27},
340 {0x877, 0x01},
341 {0x878, 0x00},
342 {0x879, 0x00},
343 {0x87A, 0x00},
344 {0x87B, 0x03},
345 {0x87C, 0x00},
346 {0x87D, 0x00},
347 {0x87E, 0x00},
348 {0x87F, 0x00},
349 {0x880, 0x00},
350 {0x881, 0x00},
351 {0x882, 0x00},
352 {0x883, 0x00},
353 {0x884, 0x00},
354 {0x885, 0x00},
355 {0x886, 0xF8},
356 {0x887, 0x00},
357 {0x888, 0x03},
358 {0x889, 0x00},
359 {0x88A, 0x64},
360 {0x88B, 0x00},
361 {0x88C, 0x03},
362 {0x88D, 0x00},
363 {0x88E, 0xB1},
364 {0x88F, 0x00},
365 {0x890, 0x03},
366 {0x891, 0x01},
367 {0x892, 0x1D},
368 {0x893, 0x00},
369 {0x894, 0x03},
370 {0x895, 0x01},
371 {0x896, 0x4B},
372 {0x897, 0x00},
373 {0x898, 0xE5},
374 {0x899, 0x00},
375 {0x89A, 0x01},
376 {0x89B, 0x00},
377 {0x89C, 0x01},
378 {0x89D, 0x04},
379 {0x89E, 0xC8},
380 {0x89F, 0x00},
381 {0x8A0, 0x01},
382 {0x8A1, 0x01},
383 {0x8A2, 0x61},
384 {0x8A3, 0x00},
385 {0x8A4, 0x01},
386 {0x8A5, 0x00},
387 {0x8A6, 0x00},
388 {0x8A7, 0x00},
389 {0x8A8, 0x00},
390 {0x8A9, 0x00},
391 {0x8AA, 0x7F},
392 {0x8AB, 0x03},
393 {0x8AC, 0x00},
394 {0x8AD, 0x00},
395 {0x8AE, 0x00},
396 {0x8AF, 0x00},
397 {0x8B0, 0x00},
398 {0x8B1, 0x00},
399 {0x8B6, 0x00},
400 {0x8B7, 0x01},
401 {0x8B8, 0x00},
402 {0x8B9, 0x00},
403 {0x8BA, 0x02},
404 {0x8BB, 0x00},
405 {0x8BC, 0xFF},
406 {0x8BD, 0x00},
407 {0x8FE, 2},
408 };
409
410 static const struct rj54n1_reg_val bank_10[] = {
411 {0x10bf, 0x69}
412 };
413
414 /* Clock dividers - these are default register values, divider = register + 1 */
415 static const struct rj54n1_clock_div clk_div = {
416 .ratio_tg = 3 /* default: 5 */,
417 .ratio_t = 4 /* default: 1 */,
418 .ratio_r = 4 /* default: 0 */,
419 .ratio_op = 1 /* default: 5 */,
420 .ratio_o = 9 /* default: 0 */,
421 };
422
423 static struct rj54n1 *to_rj54n1(const struct i2c_client *client)
424 {
425 return container_of(i2c_get_clientdata(client), struct rj54n1, subdev);
426 }
427
428 static int reg_read(struct i2c_client *client, const u16 reg)
429 {
430 struct rj54n1 *rj54n1 = to_rj54n1(client);
431 int ret;
432
433 /* set bank */
434 if (rj54n1->bank != reg >> 8) {
435 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
436 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
437 if (ret < 0)
438 return ret;
439 rj54n1->bank = reg >> 8;
440 }
441 return i2c_smbus_read_byte_data(client, reg & 0xff);
442 }
443
444 static int reg_write(struct i2c_client *client, const u16 reg,
445 const u8 data)
446 {
447 struct rj54n1 *rj54n1 = to_rj54n1(client);
448 int ret;
449
450 /* set bank */
451 if (rj54n1->bank != reg >> 8) {
452 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
453 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
454 if (ret < 0)
455 return ret;
456 rj54n1->bank = reg >> 8;
457 }
458 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", reg & 0xff, data);
459 return i2c_smbus_write_byte_data(client, reg & 0xff, data);
460 }
461
462 static int reg_set(struct i2c_client *client, const u16 reg,
463 const u8 data, const u8 mask)
464 {
465 int ret;
466
467 ret = reg_read(client, reg);
468 if (ret < 0)
469 return ret;
470 return reg_write(client, reg, (ret & ~mask) | (data & mask));
471 }
472
473 static int reg_write_multiple(struct i2c_client *client,
474 const struct rj54n1_reg_val *rv, const int n)
475 {
476 int i, ret;
477
478 for (i = 0; i < n; i++) {
479 ret = reg_write(client, rv->reg, rv->val);
480 if (ret < 0)
481 return ret;
482 rv++;
483 }
484
485 return 0;
486 }
487
488 static int rj54n1_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
489 enum v4l2_mbus_pixelcode *code)
490 {
491 if (index >= ARRAY_SIZE(rj54n1_colour_fmts))
492 return -EINVAL;
493
494 *code = rj54n1_colour_fmts[index].code;
495 return 0;
496 }
497
498 static int rj54n1_s_stream(struct v4l2_subdev *sd, int enable)
499 {
500 struct i2c_client *client = v4l2_get_subdevdata(sd);
501
502 /* Switch between preview and still shot modes */
503 return reg_set(client, RJ54N1_STILL_CONTROL, (!enable) << 7, 0x80);
504 }
505
506 static int rj54n1_set_rect(struct i2c_client *client,
507 u16 reg_x, u16 reg_y, u16 reg_xy,
508 u32 width, u32 height)
509 {
510 int ret;
511
512 ret = reg_write(client, reg_xy,
513 ((width >> 4) & 0x70) |
514 ((height >> 8) & 7));
515
516 if (!ret)
517 ret = reg_write(client, reg_x, width & 0xff);
518 if (!ret)
519 ret = reg_write(client, reg_y, height & 0xff);
520
521 return ret;
522 }
523
524 /*
525 * Some commands, specifically certain initialisation sequences, require
526 * a commit operation.
527 */
528 static int rj54n1_commit(struct i2c_client *client)
529 {
530 int ret = reg_write(client, RJ54N1_INIT_START, 1);
531 msleep(10);
532 if (!ret)
533 ret = reg_write(client, RJ54N1_INIT_START, 0);
534 return ret;
535 }
536
537 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
538 s32 *out_w, s32 *out_h);
539
540 static int rj54n1_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)
541 {
542 struct i2c_client *client = v4l2_get_subdevdata(sd);
543 struct rj54n1 *rj54n1 = to_rj54n1(client);
544 const struct v4l2_rect *rect = &a->c;
545 int dummy = 0, output_w, output_h,
546 input_w = rect->width, input_h = rect->height;
547 int ret;
548
549 /* arbitrary minimum width and height, edges unimportant */
550 soc_camera_limit_side(&dummy, &input_w,
551 RJ54N1_COLUMN_SKIP, 8, RJ54N1_MAX_WIDTH);
552
553 soc_camera_limit_side(&dummy, &input_h,
554 RJ54N1_ROW_SKIP, 8, RJ54N1_MAX_HEIGHT);
555
556 output_w = (input_w * 1024 + rj54n1->resize / 2) / rj54n1->resize;
557 output_h = (input_h * 1024 + rj54n1->resize / 2) / rj54n1->resize;
558
559 dev_dbg(&client->dev, "Scaling for %dx%d : %u = %dx%d\n",
560 input_w, input_h, rj54n1->resize, output_w, output_h);
561
562 ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
563 if (ret < 0)
564 return ret;
565
566 rj54n1->width = output_w;
567 rj54n1->height = output_h;
568 rj54n1->resize = ret;
569 rj54n1->rect.width = input_w;
570 rj54n1->rect.height = input_h;
571
572 return 0;
573 }
574
575 static int rj54n1_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
576 {
577 struct i2c_client *client = v4l2_get_subdevdata(sd);
578 struct rj54n1 *rj54n1 = to_rj54n1(client);
579
580 a->c = rj54n1->rect;
581 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
582
583 return 0;
584 }
585
586 static int rj54n1_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
587 {
588 a->bounds.left = RJ54N1_COLUMN_SKIP;
589 a->bounds.top = RJ54N1_ROW_SKIP;
590 a->bounds.width = RJ54N1_MAX_WIDTH;
591 a->bounds.height = RJ54N1_MAX_HEIGHT;
592 a->defrect = a->bounds;
593 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
594 a->pixelaspect.numerator = 1;
595 a->pixelaspect.denominator = 1;
596
597 return 0;
598 }
599
600 static int rj54n1_g_fmt(struct v4l2_subdev *sd,
601 struct v4l2_mbus_framefmt *mf)
602 {
603 struct i2c_client *client = v4l2_get_subdevdata(sd);
604 struct rj54n1 *rj54n1 = to_rj54n1(client);
605
606 mf->code = rj54n1->fmt->code;
607 mf->colorspace = rj54n1->fmt->colorspace;
608 mf->field = V4L2_FIELD_NONE;
609 mf->width = rj54n1->width;
610 mf->height = rj54n1->height;
611
612 return 0;
613 }
614
615 /*
616 * The actual geometry configuration routine. It scales the input window into
617 * the output one, updates the window sizes and returns an error or the resize
618 * coefficient on success. Note: we only use the "Fixed Scaling" on this camera.
619 */
620 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
621 s32 *out_w, s32 *out_h)
622 {
623 struct i2c_client *client = v4l2_get_subdevdata(sd);
624 struct rj54n1 *rj54n1 = to_rj54n1(client);
625 unsigned int skip, resize, input_w = *in_w, input_h = *in_h,
626 output_w = *out_w, output_h = *out_h;
627 u16 inc_sel, wb_bit8, wb_left, wb_right, wb_top, wb_bottom;
628 unsigned int peak, peak_50, peak_60;
629 int ret;
630
631 /*
632 * We have a problem with crops, where the window is larger than 512x384
633 * and output window is larger than a half of the input one. In this
634 * case we have to either reduce the input window to equal or below
635 * 512x384 or the output window to equal or below 1/2 of the input.
636 */
637 if (output_w > max(512U, input_w / 2)) {
638 if (2 * output_w > RJ54N1_MAX_WIDTH) {
639 input_w = RJ54N1_MAX_WIDTH;
640 output_w = RJ54N1_MAX_WIDTH / 2;
641 } else {
642 input_w = output_w * 2;
643 }
644
645 dev_dbg(&client->dev, "Adjusted output width: in %u, out %u\n",
646 input_w, output_w);
647 }
648
649 if (output_h > max(384U, input_h / 2)) {
650 if (2 * output_h > RJ54N1_MAX_HEIGHT) {
651 input_h = RJ54N1_MAX_HEIGHT;
652 output_h = RJ54N1_MAX_HEIGHT / 2;
653 } else {
654 input_h = output_h * 2;
655 }
656
657 dev_dbg(&client->dev, "Adjusted output height: in %u, out %u\n",
658 input_h, output_h);
659 }
660
661 /* Idea: use the read mode for snapshots, handle separate geometries */
662 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_S_L,
663 RJ54N1_Y_OUTPUT_SIZE_S_L,
664 RJ54N1_XY_OUTPUT_SIZE_S_H, output_w, output_h);
665 if (!ret)
666 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_P_L,
667 RJ54N1_Y_OUTPUT_SIZE_P_L,
668 RJ54N1_XY_OUTPUT_SIZE_P_H, output_w, output_h);
669
670 if (ret < 0)
671 return ret;
672
673 if (output_w > input_w && output_h > input_h) {
674 input_w = output_w;
675 input_h = output_h;
676
677 resize = 1024;
678 } else {
679 unsigned int resize_x, resize_y;
680 resize_x = (input_w * 1024 + output_w / 2) / output_w;
681 resize_y = (input_h * 1024 + output_h / 2) / output_h;
682
683 /* We want max(resize_x, resize_y), check if it still fits */
684 if (resize_x > resize_y &&
685 (output_h * resize_x + 512) / 1024 > RJ54N1_MAX_HEIGHT)
686 resize = (RJ54N1_MAX_HEIGHT * 1024 + output_h / 2) /
687 output_h;
688 else if (resize_y > resize_x &&
689 (output_w * resize_y + 512) / 1024 > RJ54N1_MAX_WIDTH)
690 resize = (RJ54N1_MAX_WIDTH * 1024 + output_w / 2) /
691 output_w;
692 else
693 resize = max(resize_x, resize_y);
694
695 /* Prohibited value ranges */
696 switch (resize) {
697 case 2040 ... 2047:
698 resize = 2039;
699 break;
700 case 4080 ... 4095:
701 resize = 4079;
702 break;
703 case 8160 ... 8191:
704 resize = 8159;
705 break;
706 case 16320 ... 16384:
707 resize = 16319;
708 }
709 }
710
711 /* Set scaling */
712 ret = reg_write(client, RJ54N1_RESIZE_HOLD_L, resize & 0xff);
713 if (!ret)
714 ret = reg_write(client, RJ54N1_RESIZE_HOLD_H, resize >> 8);
715
716 if (ret < 0)
717 return ret;
718
719 /*
720 * Configure a skipping bitmask. The sensor will select a skipping value
721 * among set bits automatically. This is very unclear in the datasheet
722 * too. I was told, in this register one enables all skipping values,
723 * that are required for a specific resize, and the camera selects
724 * automatically, which ones to use. But it is unclear how to identify,
725 * which cropping values are needed. Secondly, why don't we just set all
726 * bits and let the camera choose? Would it increase processing time and
727 * reduce the framerate? Using 0xfffc for INC_USE_SEL doesn't seem to
728 * improve the image quality or stability for larger frames (see comment
729 * above), but I didn't check the framerate.
730 */
731 skip = min(resize / 1024, 15U);
732
733 inc_sel = 1 << skip;
734
735 if (inc_sel <= 2)
736 inc_sel = 0xc;
737 else if (resize & 1023 && skip < 15)
738 inc_sel |= 1 << (skip + 1);
739
740 ret = reg_write(client, RJ54N1_INC_USE_SEL_L, inc_sel & 0xfc);
741 if (!ret)
742 ret = reg_write(client, RJ54N1_INC_USE_SEL_H, inc_sel >> 8);
743
744 if (!rj54n1->auto_wb) {
745 /* Auto white balance window */
746 wb_left = output_w / 16;
747 wb_right = (3 * output_w / 4 - 3) / 4;
748 wb_top = output_h / 16;
749 wb_bottom = (3 * output_h / 4 - 3) / 4;
750 wb_bit8 = ((wb_left >> 2) & 0x40) | ((wb_top >> 4) & 0x10) |
751 ((wb_right >> 6) & 4) | ((wb_bottom >> 8) & 1);
752
753 if (!ret)
754 ret = reg_write(client, RJ54N1_BIT8_WB, wb_bit8);
755 if (!ret)
756 ret = reg_write(client, RJ54N1_HCAPS_WB, wb_left);
757 if (!ret)
758 ret = reg_write(client, RJ54N1_VCAPS_WB, wb_top);
759 if (!ret)
760 ret = reg_write(client, RJ54N1_HCAPE_WB, wb_right);
761 if (!ret)
762 ret = reg_write(client, RJ54N1_VCAPE_WB, wb_bottom);
763 }
764
765 /* Antiflicker */
766 peak = 12 * RJ54N1_MAX_WIDTH * (1 << 14) * resize / rj54n1->tgclk_mhz /
767 10000;
768 peak_50 = peak / 6;
769 peak_60 = peak / 5;
770
771 if (!ret)
772 ret = reg_write(client, RJ54N1_PEAK_H,
773 ((peak_50 >> 4) & 0xf0) | (peak_60 >> 8));
774 if (!ret)
775 ret = reg_write(client, RJ54N1_PEAK_50, peak_50);
776 if (!ret)
777 ret = reg_write(client, RJ54N1_PEAK_60, peak_60);
778 if (!ret)
779 ret = reg_write(client, RJ54N1_PEAK_DIFF, peak / 150);
780
781 /* Start resizing */
782 if (!ret)
783 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
784 RESIZE_HOLD_SEL | RESIZE_GO | 1);
785
786 if (ret < 0)
787 return ret;
788
789 /* Constant taken from manufacturer's example */
790 msleep(230);
791
792 ret = reg_write(client, RJ54N1_RESIZE_CONTROL, RESIZE_HOLD_SEL | 1);
793 if (ret < 0)
794 return ret;
795
796 *in_w = (output_w * resize + 512) / 1024;
797 *in_h = (output_h * resize + 512) / 1024;
798 *out_w = output_w;
799 *out_h = output_h;
800
801 dev_dbg(&client->dev, "Scaled for %dx%d : %u = %ux%u, skip %u\n",
802 *in_w, *in_h, resize, output_w, output_h, skip);
803
804 return resize;
805 }
806
807 static int rj54n1_set_clock(struct i2c_client *client)
808 {
809 struct rj54n1 *rj54n1 = to_rj54n1(client);
810 int ret;
811
812 /* Enable external clock */
813 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK | SOFT_STDBY);
814 /* Leave stand-by. Note: use this when implementing suspend / resume */
815 if (!ret)
816 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK);
817
818 if (!ret)
819 ret = reg_write(client, RJ54N1_PLL_L, PLL_L);
820 if (!ret)
821 ret = reg_write(client, RJ54N1_PLL_N, PLL_N);
822
823 /* TGCLK dividers */
824 if (!ret)
825 ret = reg_write(client, RJ54N1_RATIO_TG,
826 rj54n1->clk_div.ratio_tg);
827 if (!ret)
828 ret = reg_write(client, RJ54N1_RATIO_T,
829 rj54n1->clk_div.ratio_t);
830 if (!ret)
831 ret = reg_write(client, RJ54N1_RATIO_R,
832 rj54n1->clk_div.ratio_r);
833
834 /* Enable TGCLK & RAMP */
835 if (!ret)
836 ret = reg_write(client, RJ54N1_RAMP_TGCLK_EN, 3);
837
838 /* Disable clock output */
839 if (!ret)
840 ret = reg_write(client, RJ54N1_OCLK_DSP, 0);
841
842 /* Set divisors */
843 if (!ret)
844 ret = reg_write(client, RJ54N1_RATIO_OP,
845 rj54n1->clk_div.ratio_op);
846 if (!ret)
847 ret = reg_write(client, RJ54N1_RATIO_O,
848 rj54n1->clk_div.ratio_o);
849
850 /* Enable OCLK */
851 if (!ret)
852 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
853
854 /* Use PLL for Timing Generator, write 2 to reserved bits */
855 if (!ret)
856 ret = reg_write(client, RJ54N1_TG_BYPASS, 2);
857
858 /* Take sensor out of reset */
859 if (!ret)
860 ret = reg_write(client, RJ54N1_RESET_STANDBY,
861 E_EXCLK | SEN_RSTX);
862 /* Enable PLL */
863 if (!ret)
864 ret = reg_write(client, RJ54N1_PLL_EN, 1);
865
866 /* Wait for PLL to stabilise */
867 msleep(10);
868
869 /* Enable clock to frequency divider */
870 if (!ret)
871 ret = reg_write(client, RJ54N1_CLK_RST, 1);
872
873 if (!ret)
874 ret = reg_read(client, RJ54N1_CLK_RST);
875 if (ret != 1) {
876 dev_err(&client->dev,
877 "Resetting RJ54N1CB0C clock failed: %d!\n", ret);
878 return -EIO;
879 }
880
881 /* Start the PLL */
882 ret = reg_set(client, RJ54N1_OCLK_DSP, 1, 1);
883
884 /* Enable OCLK */
885 if (!ret)
886 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
887
888 return ret;
889 }
890
891 static int rj54n1_reg_init(struct i2c_client *client)
892 {
893 struct rj54n1 *rj54n1 = to_rj54n1(client);
894 int ret = rj54n1_set_clock(client);
895
896 if (!ret)
897 ret = reg_write_multiple(client, bank_7, ARRAY_SIZE(bank_7));
898 if (!ret)
899 ret = reg_write_multiple(client, bank_10, ARRAY_SIZE(bank_10));
900
901 /* Set binning divisors */
902 if (!ret)
903 ret = reg_write(client, RJ54N1_SCALE_1_2_LEV, 3 | (7 << 4));
904 if (!ret)
905 ret = reg_write(client, RJ54N1_SCALE_4_LEV, 0xf);
906
907 /* Switch to fixed resize mode */
908 if (!ret)
909 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
910 RESIZE_HOLD_SEL | 1);
911
912 /* Set gain */
913 if (!ret)
914 ret = reg_write(client, RJ54N1_Y_GAIN, 0x84);
915
916 /*
917 * Mirror the image back: default is upside down and left-to-right...
918 * Set manual preview / still shot switching
919 */
920 if (!ret)
921 ret = reg_write(client, RJ54N1_MIRROR_STILL_MODE, 0x27);
922
923 if (!ret)
924 ret = reg_write_multiple(client, bank_4, ARRAY_SIZE(bank_4));
925
926 /* Auto exposure area */
927 if (!ret)
928 ret = reg_write(client, RJ54N1_EXPOSURE_CONTROL, 0x80);
929 /* Check current auto WB config */
930 if (!ret)
931 ret = reg_read(client, RJ54N1_WB_SEL_WEIGHT_I);
932 if (ret >= 0) {
933 rj54n1->auto_wb = ret & 0x80;
934 ret = reg_write_multiple(client, bank_5, ARRAY_SIZE(bank_5));
935 }
936 if (!ret)
937 ret = reg_write_multiple(client, bank_8, ARRAY_SIZE(bank_8));
938
939 if (!ret)
940 ret = reg_write(client, RJ54N1_RESET_STANDBY,
941 E_EXCLK | DSP_RSTX | SEN_RSTX);
942
943 /* Commit init */
944 if (!ret)
945 ret = rj54n1_commit(client);
946
947 /* Take DSP, TG, sensor out of reset */
948 if (!ret)
949 ret = reg_write(client, RJ54N1_RESET_STANDBY,
950 E_EXCLK | DSP_RSTX | TG_RSTX | SEN_RSTX);
951
952 /* Start register update? Same register as 0x?FE in many bank_* sets */
953 if (!ret)
954 ret = reg_write(client, RJ54N1_FWFLG, 2);
955
956 /* Constant taken from manufacturer's example */
957 msleep(700);
958
959 return ret;
960 }
961
962 static int rj54n1_try_fmt(struct v4l2_subdev *sd,
963 struct v4l2_mbus_framefmt *mf)
964 {
965 struct i2c_client *client = v4l2_get_subdevdata(sd);
966 struct rj54n1 *rj54n1 = to_rj54n1(client);
967 const struct rj54n1_datafmt *fmt;
968 int align = mf->code == V4L2_MBUS_FMT_SBGGR10_1X10 ||
969 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE ||
970 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE ||
971 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE ||
972 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE;
973
974 dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
975 __func__, mf->code, mf->width, mf->height);
976
977 fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
978 ARRAY_SIZE(rj54n1_colour_fmts));
979 if (!fmt) {
980 fmt = rj54n1->fmt;
981 mf->code = fmt->code;
982 }
983
984 mf->field = V4L2_FIELD_NONE;
985 mf->colorspace = fmt->colorspace;
986
987 v4l_bound_align_image(&mf->width, 112, RJ54N1_MAX_WIDTH, align,
988 &mf->height, 84, RJ54N1_MAX_HEIGHT, align, 0);
989
990 return 0;
991 }
992
993 static int rj54n1_s_fmt(struct v4l2_subdev *sd,
994 struct v4l2_mbus_framefmt *mf)
995 {
996 struct i2c_client *client = v4l2_get_subdevdata(sd);
997 struct rj54n1 *rj54n1 = to_rj54n1(client);
998 const struct rj54n1_datafmt *fmt;
999 int output_w, output_h, max_w, max_h,
1000 input_w = rj54n1->rect.width, input_h = rj54n1->rect.height;
1001 int ret;
1002
1003 /*
1004 * The host driver can call us without .try_fmt(), so, we have to take
1005 * care ourseleves
1006 */
1007 rj54n1_try_fmt(sd, mf);
1008
1009 /*
1010 * Verify if the sensor has just been powered on. TODO: replace this
1011 * with proper PM, when a suitable API is available.
1012 */
1013 ret = reg_read(client, RJ54N1_RESET_STANDBY);
1014 if (ret < 0)
1015 return ret;
1016
1017 if (!(ret & E_EXCLK)) {
1018 ret = rj54n1_reg_init(client);
1019 if (ret < 0)
1020 return ret;
1021 }
1022
1023 dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
1024 __func__, mf->code, mf->width, mf->height);
1025
1026 /* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */
1027 switch (mf->code) {
1028 case V4L2_MBUS_FMT_YUYV8_2X8:
1029 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1030 if (!ret)
1031 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1032 break;
1033 case V4L2_MBUS_FMT_YVYU8_2X8:
1034 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1035 if (!ret)
1036 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1037 break;
1038 case V4L2_MBUS_FMT_RGB565_2X8_LE:
1039 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1040 if (!ret)
1041 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1042 break;
1043 case V4L2_MBUS_FMT_RGB565_2X8_BE:
1044 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1045 if (!ret)
1046 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1047 break;
1048 case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE:
1049 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1050 if (!ret)
1051 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1052 if (!ret)
1053 ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1054 break;
1055 case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE:
1056 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1057 if (!ret)
1058 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1059 if (!ret)
1060 ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1061 break;
1062 case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE:
1063 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1064 if (!ret)
1065 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1066 if (!ret)
1067 ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1068 break;
1069 case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE:
1070 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1071 if (!ret)
1072 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1073 if (!ret)
1074 ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1075 break;
1076 case V4L2_MBUS_FMT_SBGGR10_1X10:
1077 ret = reg_write(client, RJ54N1_OUT_SEL, 5);
1078 break;
1079 default:
1080 ret = -EINVAL;
1081 }
1082
1083 /* Special case: a raw mode with 10 bits of data per clock tick */
1084 if (!ret)
1085 ret = reg_set(client, RJ54N1_OCLK_SEL_EN,
1086 (mf->code == V4L2_MBUS_FMT_SBGGR10_1X10) << 1, 2);
1087
1088 if (ret < 0)
1089 return ret;
1090
1091 /* Supported scales 1:1 >= scale > 1:16 */
1092 max_w = mf->width * (16 * 1024 - 1) / 1024;
1093 if (input_w > max_w)
1094 input_w = max_w;
1095 max_h = mf->height * (16 * 1024 - 1) / 1024;
1096 if (input_h > max_h)
1097 input_h = max_h;
1098
1099 output_w = mf->width;
1100 output_h = mf->height;
1101
1102 ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
1103 if (ret < 0)
1104 return ret;
1105
1106 fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
1107 ARRAY_SIZE(rj54n1_colour_fmts));
1108
1109 rj54n1->fmt = fmt;
1110 rj54n1->resize = ret;
1111 rj54n1->rect.width = input_w;
1112 rj54n1->rect.height = input_h;
1113 rj54n1->width = output_w;
1114 rj54n1->height = output_h;
1115
1116 mf->width = output_w;
1117 mf->height = output_h;
1118 mf->field = V4L2_FIELD_NONE;
1119 mf->colorspace = fmt->colorspace;
1120
1121 return 0;
1122 }
1123
1124 #ifdef CONFIG_VIDEO_ADV_DEBUG
1125 static int rj54n1_g_register(struct v4l2_subdev *sd,
1126 struct v4l2_dbg_register *reg)
1127 {
1128 struct i2c_client *client = v4l2_get_subdevdata(sd);
1129
1130 if (reg->reg < 0x400 || reg->reg > 0x1fff)
1131 /* Registers > 0x0800 are only available from Sharp support */
1132 return -EINVAL;
1133
1134 reg->size = 1;
1135 reg->val = reg_read(client, reg->reg);
1136
1137 if (reg->val > 0xff)
1138 return -EIO;
1139
1140 return 0;
1141 }
1142
1143 static int rj54n1_s_register(struct v4l2_subdev *sd,
1144 const struct v4l2_dbg_register *reg)
1145 {
1146 struct i2c_client *client = v4l2_get_subdevdata(sd);
1147
1148 if (reg->reg < 0x400 || reg->reg > 0x1fff)
1149 /* Registers >= 0x0800 are only available from Sharp support */
1150 return -EINVAL;
1151
1152 if (reg_write(client, reg->reg, reg->val) < 0)
1153 return -EIO;
1154
1155 return 0;
1156 }
1157 #endif
1158
1159 static int rj54n1_s_power(struct v4l2_subdev *sd, int on)
1160 {
1161 struct i2c_client *client = v4l2_get_subdevdata(sd);
1162 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1163 struct rj54n1 *rj54n1 = to_rj54n1(client);
1164
1165 return soc_camera_set_power(&client->dev, ssdd, rj54n1->clk, on);
1166 }
1167
1168 static int rj54n1_s_ctrl(struct v4l2_ctrl *ctrl)
1169 {
1170 struct rj54n1 *rj54n1 = container_of(ctrl->handler, struct rj54n1, hdl);
1171 struct v4l2_subdev *sd = &rj54n1->subdev;
1172 struct i2c_client *client = v4l2_get_subdevdata(sd);
1173 int data;
1174
1175 switch (ctrl->id) {
1176 case V4L2_CID_VFLIP:
1177 if (ctrl->val)
1178 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 1);
1179 else
1180 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 1, 1);
1181 if (data < 0)
1182 return -EIO;
1183 return 0;
1184 case V4L2_CID_HFLIP:
1185 if (ctrl->val)
1186 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 2);
1187 else
1188 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 2, 2);
1189 if (data < 0)
1190 return -EIO;
1191 return 0;
1192 case V4L2_CID_GAIN:
1193 if (reg_write(client, RJ54N1_Y_GAIN, ctrl->val * 2) < 0)
1194 return -EIO;
1195 return 0;
1196 case V4L2_CID_AUTO_WHITE_BALANCE:
1197 /* Auto WB area - whole image */
1198 if (reg_set(client, RJ54N1_WB_SEL_WEIGHT_I, ctrl->val << 7,
1199 0x80) < 0)
1200 return -EIO;
1201 rj54n1->auto_wb = ctrl->val;
1202 return 0;
1203 }
1204
1205 return -EINVAL;
1206 }
1207
1208 static const struct v4l2_ctrl_ops rj54n1_ctrl_ops = {
1209 .s_ctrl = rj54n1_s_ctrl,
1210 };
1211
1212 static struct v4l2_subdev_core_ops rj54n1_subdev_core_ops = {
1213 #ifdef CONFIG_VIDEO_ADV_DEBUG
1214 .g_register = rj54n1_g_register,
1215 .s_register = rj54n1_s_register,
1216 #endif
1217 .s_power = rj54n1_s_power,
1218 };
1219
1220 static int rj54n1_g_mbus_config(struct v4l2_subdev *sd,
1221 struct v4l2_mbus_config *cfg)
1222 {
1223 struct i2c_client *client = v4l2_get_subdevdata(sd);
1224 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1225
1226 cfg->flags =
1227 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
1228 V4L2_MBUS_MASTER | V4L2_MBUS_DATA_ACTIVE_HIGH |
1229 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH;
1230 cfg->type = V4L2_MBUS_PARALLEL;
1231 cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
1232
1233 return 0;
1234 }
1235
1236 static int rj54n1_s_mbus_config(struct v4l2_subdev *sd,
1237 const struct v4l2_mbus_config *cfg)
1238 {
1239 struct i2c_client *client = v4l2_get_subdevdata(sd);
1240 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1241
1242 /* Figures 2.5-1 to 2.5-3 - default falling pixclk edge */
1243 if (soc_camera_apply_board_flags(ssdd, cfg) &
1244 V4L2_MBUS_PCLK_SAMPLE_RISING)
1245 return reg_write(client, RJ54N1_OUT_SIGPO, 1 << 4);
1246 else
1247 return reg_write(client, RJ54N1_OUT_SIGPO, 0);
1248 }
1249
1250 static struct v4l2_subdev_video_ops rj54n1_subdev_video_ops = {
1251 .s_stream = rj54n1_s_stream,
1252 .s_mbus_fmt = rj54n1_s_fmt,
1253 .g_mbus_fmt = rj54n1_g_fmt,
1254 .try_mbus_fmt = rj54n1_try_fmt,
1255 .enum_mbus_fmt = rj54n1_enum_fmt,
1256 .g_crop = rj54n1_g_crop,
1257 .s_crop = rj54n1_s_crop,
1258 .cropcap = rj54n1_cropcap,
1259 .g_mbus_config = rj54n1_g_mbus_config,
1260 .s_mbus_config = rj54n1_s_mbus_config,
1261 };
1262
1263 static struct v4l2_subdev_ops rj54n1_subdev_ops = {
1264 .core = &rj54n1_subdev_core_ops,
1265 .video = &rj54n1_subdev_video_ops,
1266 };
1267
1268 /*
1269 * Interface active, can use i2c. If it fails, it can indeed mean, that
1270 * this wasn't our capture interface, so, we wait for the right one
1271 */
1272 static int rj54n1_video_probe(struct i2c_client *client,
1273 struct rj54n1_pdata *priv)
1274 {
1275 struct rj54n1 *rj54n1 = to_rj54n1(client);
1276 int data1, data2;
1277 int ret;
1278
1279 ret = rj54n1_s_power(&rj54n1->subdev, 1);
1280 if (ret < 0)
1281 return ret;
1282
1283 /* Read out the chip version register */
1284 data1 = reg_read(client, RJ54N1_DEV_CODE);
1285 data2 = reg_read(client, RJ54N1_DEV_CODE2);
1286
1287 if (data1 != 0x51 || data2 != 0x10) {
1288 ret = -ENODEV;
1289 dev_info(&client->dev, "No RJ54N1CB0C found, read 0x%x:0x%x\n",
1290 data1, data2);
1291 goto done;
1292 }
1293
1294 /* Configure IOCTL polarity from the platform data: 0 or 1 << 7. */
1295 ret = reg_write(client, RJ54N1_IOC, priv->ioctl_high << 7);
1296 if (ret < 0)
1297 goto done;
1298
1299 dev_info(&client->dev, "Detected a RJ54N1CB0C chip ID 0x%x:0x%x\n",
1300 data1, data2);
1301
1302 ret = v4l2_ctrl_handler_setup(&rj54n1->hdl);
1303
1304 done:
1305 rj54n1_s_power(&rj54n1->subdev, 0);
1306 return ret;
1307 }
1308
1309 static int rj54n1_probe(struct i2c_client *client,
1310 const struct i2c_device_id *did)
1311 {
1312 struct rj54n1 *rj54n1;
1313 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1314 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1315 struct rj54n1_pdata *rj54n1_priv;
1316 int ret;
1317
1318 if (!ssdd || !ssdd->drv_priv) {
1319 dev_err(&client->dev, "RJ54N1CB0C: missing platform data!\n");
1320 return -EINVAL;
1321 }
1322
1323 rj54n1_priv = ssdd->drv_priv;
1324
1325 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1326 dev_warn(&adapter->dev,
1327 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
1328 return -EIO;
1329 }
1330
1331 rj54n1 = devm_kzalloc(&client->dev, sizeof(struct rj54n1), GFP_KERNEL);
1332 if (!rj54n1)
1333 return -ENOMEM;
1334
1335 v4l2_i2c_subdev_init(&rj54n1->subdev, client, &rj54n1_subdev_ops);
1336 v4l2_ctrl_handler_init(&rj54n1->hdl, 4);
1337 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1338 V4L2_CID_VFLIP, 0, 1, 1, 0);
1339 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1340 V4L2_CID_HFLIP, 0, 1, 1, 0);
1341 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1342 V4L2_CID_GAIN, 0, 127, 1, 66);
1343 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1344 V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1345 rj54n1->subdev.ctrl_handler = &rj54n1->hdl;
1346 if (rj54n1->hdl.error)
1347 return rj54n1->hdl.error;
1348
1349 rj54n1->clk_div = clk_div;
1350 rj54n1->rect.left = RJ54N1_COLUMN_SKIP;
1351 rj54n1->rect.top = RJ54N1_ROW_SKIP;
1352 rj54n1->rect.width = RJ54N1_MAX_WIDTH;
1353 rj54n1->rect.height = RJ54N1_MAX_HEIGHT;
1354 rj54n1->width = RJ54N1_MAX_WIDTH;
1355 rj54n1->height = RJ54N1_MAX_HEIGHT;
1356 rj54n1->fmt = &rj54n1_colour_fmts[0];
1357 rj54n1->resize = 1024;
1358 rj54n1->tgclk_mhz = (rj54n1_priv->mclk_freq / PLL_L * PLL_N) /
1359 (clk_div.ratio_tg + 1) / (clk_div.ratio_t + 1);
1360
1361 rj54n1->clk = v4l2_clk_get(&client->dev, "mclk");
1362 if (IS_ERR(rj54n1->clk)) {
1363 ret = PTR_ERR(rj54n1->clk);
1364 goto eclkget;
1365 }
1366
1367 ret = rj54n1_video_probe(client, rj54n1_priv);
1368 if (ret < 0) {
1369 v4l2_clk_put(rj54n1->clk);
1370 eclkget:
1371 v4l2_ctrl_handler_free(&rj54n1->hdl);
1372 }
1373
1374 return ret;
1375 }
1376
1377 static int rj54n1_remove(struct i2c_client *client)
1378 {
1379 struct rj54n1 *rj54n1 = to_rj54n1(client);
1380 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1381
1382 v4l2_clk_put(rj54n1->clk);
1383 v4l2_device_unregister_subdev(&rj54n1->subdev);
1384 if (ssdd->free_bus)
1385 ssdd->free_bus(ssdd);
1386 v4l2_ctrl_handler_free(&rj54n1->hdl);
1387
1388 return 0;
1389 }
1390
1391 static const struct i2c_device_id rj54n1_id[] = {
1392 { "rj54n1cb0c", 0 },
1393 { }
1394 };
1395 MODULE_DEVICE_TABLE(i2c, rj54n1_id);
1396
1397 static struct i2c_driver rj54n1_i2c_driver = {
1398 .driver = {
1399 .name = "rj54n1cb0c",
1400 },
1401 .probe = rj54n1_probe,
1402 .remove = rj54n1_remove,
1403 .id_table = rj54n1_id,
1404 };
1405
1406 module_i2c_driver(rj54n1_i2c_driver);
1407
1408 MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver");
1409 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1410 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support