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 */
rj54n1_find_datafmt(u32 code,const struct rj54n1_datafmt * fmt,int n)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
to_rj54n1(const struct i2c_client * client)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
reg_read(struct i2c_client * client,const u16 reg)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
reg_write(struct i2c_client * client,const u16 reg,const u8 data)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
reg_set(struct i2c_client * client,const u16 reg,const u8 data,const u8 mask)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
reg_write_multiple(struct i2c_client * client,const struct rj54n1_reg_val * rv,const int n)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
rj54n1_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)490 static int rj54n1_enum_mbus_code(struct v4l2_subdev *sd,
491 struct v4l2_subdev_state *sd_state,
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
rj54n1_s_stream(struct v4l2_subdev * sd,int enable)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
rj54n1_set_rect(struct i2c_client * client,u16 reg_x,u16 reg_y,u16 reg_xy,u32 width,u32 height)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 */
rj54n1_commit(struct i2c_client * client)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
rj54n1_set_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)543 static int rj54n1_set_selection(struct v4l2_subdev *sd,
544 struct v4l2_subdev_state *sd_state,
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
rj54n1_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)580 static int rj54n1_get_selection(struct v4l2_subdev *sd,
581 struct v4l2_subdev_state *sd_state,
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 sel->r.left = RJ54N1_COLUMN_SKIP;
593 sel->r.top = RJ54N1_ROW_SKIP;
594 sel->r.width = RJ54N1_MAX_WIDTH;
595 sel->r.height = RJ54N1_MAX_HEIGHT;
596 return 0;
597 case V4L2_SEL_TGT_CROP:
598 sel->r = rj54n1->rect;
599 return 0;
600 default:
601 return -EINVAL;
602 }
603 }
604
rj54n1_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * format)605 static int rj54n1_get_fmt(struct v4l2_subdev *sd,
606 struct v4l2_subdev_state *sd_state,
607 struct v4l2_subdev_format *format)
608 {
609 struct v4l2_mbus_framefmt *mf = &format->format;
610 struct i2c_client *client = v4l2_get_subdevdata(sd);
611 struct rj54n1 *rj54n1 = to_rj54n1(client);
612
613 if (format->pad)
614 return -EINVAL;
615
616 mf->code = rj54n1->fmt->code;
617 mf->colorspace = rj54n1->fmt->colorspace;
618 mf->ycbcr_enc = V4L2_YCBCR_ENC_601;
619 mf->xfer_func = V4L2_XFER_FUNC_SRGB;
620 mf->quantization = V4L2_QUANTIZATION_DEFAULT;
621 mf->field = V4L2_FIELD_NONE;
622 mf->width = rj54n1->width;
623 mf->height = rj54n1->height;
624
625 return 0;
626 }
627
628 /*
629 * The actual geometry configuration routine. It scales the input window into
630 * the output one, updates the window sizes and returns an error or the resize
631 * coefficient on success. Note: we only use the "Fixed Scaling" on this camera.
632 */
rj54n1_sensor_scale(struct v4l2_subdev * sd,s32 * in_w,s32 * in_h,s32 * out_w,s32 * out_h)633 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
634 s32 *out_w, s32 *out_h)
635 {
636 struct i2c_client *client = v4l2_get_subdevdata(sd);
637 struct rj54n1 *rj54n1 = to_rj54n1(client);
638 unsigned int skip, resize, input_w = *in_w, input_h = *in_h,
639 output_w = *out_w, output_h = *out_h;
640 u16 inc_sel, wb_bit8, wb_left, wb_right, wb_top, wb_bottom;
641 unsigned int peak, peak_50, peak_60;
642 int ret;
643
644 /*
645 * We have a problem with crops, where the window is larger than 512x384
646 * and output window is larger than a half of the input one. In this
647 * case we have to either reduce the input window to equal or below
648 * 512x384 or the output window to equal or below 1/2 of the input.
649 */
650 if (output_w > max(512U, input_w / 2)) {
651 if (2 * output_w > RJ54N1_MAX_WIDTH) {
652 input_w = RJ54N1_MAX_WIDTH;
653 output_w = RJ54N1_MAX_WIDTH / 2;
654 } else {
655 input_w = output_w * 2;
656 }
657
658 dev_dbg(&client->dev, "Adjusted output width: in %u, out %u\n",
659 input_w, output_w);
660 }
661
662 if (output_h > max(384U, input_h / 2)) {
663 if (2 * output_h > RJ54N1_MAX_HEIGHT) {
664 input_h = RJ54N1_MAX_HEIGHT;
665 output_h = RJ54N1_MAX_HEIGHT / 2;
666 } else {
667 input_h = output_h * 2;
668 }
669
670 dev_dbg(&client->dev, "Adjusted output height: in %u, out %u\n",
671 input_h, output_h);
672 }
673
674 /* Idea: use the read mode for snapshots, handle separate geometries */
675 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_S_L,
676 RJ54N1_Y_OUTPUT_SIZE_S_L,
677 RJ54N1_XY_OUTPUT_SIZE_S_H, output_w, output_h);
678 if (!ret)
679 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_P_L,
680 RJ54N1_Y_OUTPUT_SIZE_P_L,
681 RJ54N1_XY_OUTPUT_SIZE_P_H, output_w, output_h);
682
683 if (ret < 0)
684 return ret;
685
686 if (output_w > input_w && output_h > input_h) {
687 input_w = output_w;
688 input_h = output_h;
689
690 resize = 1024;
691 } else {
692 unsigned int resize_x, resize_y;
693 resize_x = (input_w * 1024 + output_w / 2) / output_w;
694 resize_y = (input_h * 1024 + output_h / 2) / output_h;
695
696 /* We want max(resize_x, resize_y), check if it still fits */
697 if (resize_x > resize_y &&
698 (output_h * resize_x + 512) / 1024 > RJ54N1_MAX_HEIGHT)
699 resize = (RJ54N1_MAX_HEIGHT * 1024 + output_h / 2) /
700 output_h;
701 else if (resize_y > resize_x &&
702 (output_w * resize_y + 512) / 1024 > RJ54N1_MAX_WIDTH)
703 resize = (RJ54N1_MAX_WIDTH * 1024 + output_w / 2) /
704 output_w;
705 else
706 resize = max(resize_x, resize_y);
707
708 /* Prohibited value ranges */
709 switch (resize) {
710 case 2040 ... 2047:
711 resize = 2039;
712 break;
713 case 4080 ... 4095:
714 resize = 4079;
715 break;
716 case 8160 ... 8191:
717 resize = 8159;
718 break;
719 case 16320 ... 16384:
720 resize = 16319;
721 }
722 }
723
724 /* Set scaling */
725 ret = reg_write(client, RJ54N1_RESIZE_HOLD_L, resize & 0xff);
726 if (!ret)
727 ret = reg_write(client, RJ54N1_RESIZE_HOLD_H, resize >> 8);
728
729 if (ret < 0)
730 return ret;
731
732 /*
733 * Configure a skipping bitmask. The sensor will select a skipping value
734 * among set bits automatically. This is very unclear in the datasheet
735 * too. I was told, in this register one enables all skipping values,
736 * that are required for a specific resize, and the camera selects
737 * automatically, which ones to use. But it is unclear how to identify,
738 * which cropping values are needed. Secondly, why don't we just set all
739 * bits and let the camera choose? Would it increase processing time and
740 * reduce the framerate? Using 0xfffc for INC_USE_SEL doesn't seem to
741 * improve the image quality or stability for larger frames (see comment
742 * above), but I didn't check the framerate.
743 */
744 skip = min(resize / 1024, 15U);
745
746 inc_sel = 1 << skip;
747
748 if (inc_sel <= 2)
749 inc_sel = 0xc;
750 else if (resize & 1023 && skip < 15)
751 inc_sel |= 1 << (skip + 1);
752
753 ret = reg_write(client, RJ54N1_INC_USE_SEL_L, inc_sel & 0xfc);
754 if (!ret)
755 ret = reg_write(client, RJ54N1_INC_USE_SEL_H, inc_sel >> 8);
756
757 if (!rj54n1->auto_wb) {
758 /* Auto white balance window */
759 wb_left = output_w / 16;
760 wb_right = (3 * output_w / 4 - 3) / 4;
761 wb_top = output_h / 16;
762 wb_bottom = (3 * output_h / 4 - 3) / 4;
763 wb_bit8 = ((wb_left >> 2) & 0x40) | ((wb_top >> 4) & 0x10) |
764 ((wb_right >> 6) & 4) | ((wb_bottom >> 8) & 1);
765
766 if (!ret)
767 ret = reg_write(client, RJ54N1_BIT8_WB, wb_bit8);
768 if (!ret)
769 ret = reg_write(client, RJ54N1_HCAPS_WB, wb_left);
770 if (!ret)
771 ret = reg_write(client, RJ54N1_VCAPS_WB, wb_top);
772 if (!ret)
773 ret = reg_write(client, RJ54N1_HCAPE_WB, wb_right);
774 if (!ret)
775 ret = reg_write(client, RJ54N1_VCAPE_WB, wb_bottom);
776 }
777
778 /* Antiflicker */
779 peak = 12 * RJ54N1_MAX_WIDTH * (1 << 14) * resize / rj54n1->tgclk_mhz /
780 10000;
781 peak_50 = peak / 6;
782 peak_60 = peak / 5;
783
784 if (!ret)
785 ret = reg_write(client, RJ54N1_PEAK_H,
786 ((peak_50 >> 4) & 0xf0) | (peak_60 >> 8));
787 if (!ret)
788 ret = reg_write(client, RJ54N1_PEAK_50, peak_50);
789 if (!ret)
790 ret = reg_write(client, RJ54N1_PEAK_60, peak_60);
791 if (!ret)
792 ret = reg_write(client, RJ54N1_PEAK_DIFF, peak / 150);
793
794 /* Start resizing */
795 if (!ret)
796 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
797 RESIZE_HOLD_SEL | RESIZE_GO | 1);
798
799 if (ret < 0)
800 return ret;
801
802 /* Constant taken from manufacturer's example */
803 msleep(230);
804
805 ret = reg_write(client, RJ54N1_RESIZE_CONTROL, RESIZE_HOLD_SEL | 1);
806 if (ret < 0)
807 return ret;
808
809 *in_w = (output_w * resize + 512) / 1024;
810 *in_h = (output_h * resize + 512) / 1024;
811 *out_w = output_w;
812 *out_h = output_h;
813
814 dev_dbg(&client->dev, "Scaled for %dx%d : %u = %ux%u, skip %u\n",
815 *in_w, *in_h, resize, output_w, output_h, skip);
816
817 return resize;
818 }
819
rj54n1_set_clock(struct i2c_client * client)820 static int rj54n1_set_clock(struct i2c_client *client)
821 {
822 struct rj54n1 *rj54n1 = to_rj54n1(client);
823 int ret;
824
825 /* Enable external clock */
826 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK | SOFT_STDBY);
827 /* Leave stand-by. Note: use this when implementing suspend / resume */
828 if (!ret)
829 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK);
830
831 if (!ret)
832 ret = reg_write(client, RJ54N1_PLL_L, PLL_L);
833 if (!ret)
834 ret = reg_write(client, RJ54N1_PLL_N, PLL_N);
835
836 /* TGCLK dividers */
837 if (!ret)
838 ret = reg_write(client, RJ54N1_RATIO_TG,
839 rj54n1->clk_div.ratio_tg);
840 if (!ret)
841 ret = reg_write(client, RJ54N1_RATIO_T,
842 rj54n1->clk_div.ratio_t);
843 if (!ret)
844 ret = reg_write(client, RJ54N1_RATIO_R,
845 rj54n1->clk_div.ratio_r);
846
847 /* Enable TGCLK & RAMP */
848 if (!ret)
849 ret = reg_write(client, RJ54N1_RAMP_TGCLK_EN, 3);
850
851 /* Disable clock output */
852 if (!ret)
853 ret = reg_write(client, RJ54N1_OCLK_DSP, 0);
854
855 /* Set divisors */
856 if (!ret)
857 ret = reg_write(client, RJ54N1_RATIO_OP,
858 rj54n1->clk_div.ratio_op);
859 if (!ret)
860 ret = reg_write(client, RJ54N1_RATIO_O,
861 rj54n1->clk_div.ratio_o);
862
863 /* Enable OCLK */
864 if (!ret)
865 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
866
867 /* Use PLL for Timing Generator, write 2 to reserved bits */
868 if (!ret)
869 ret = reg_write(client, RJ54N1_TG_BYPASS, 2);
870
871 /* Take sensor out of reset */
872 if (!ret)
873 ret = reg_write(client, RJ54N1_RESET_STANDBY,
874 E_EXCLK | SEN_RSTX);
875 /* Enable PLL */
876 if (!ret)
877 ret = reg_write(client, RJ54N1_PLL_EN, 1);
878
879 /* Wait for PLL to stabilise */
880 msleep(10);
881
882 /* Enable clock to frequency divider */
883 if (!ret)
884 ret = reg_write(client, RJ54N1_CLK_RST, 1);
885
886 if (!ret)
887 ret = reg_read(client, RJ54N1_CLK_RST);
888 if (ret != 1) {
889 dev_err(&client->dev,
890 "Resetting RJ54N1CB0C clock failed: %d!\n", ret);
891 return -EIO;
892 }
893
894 /* Start the PLL */
895 ret = reg_set(client, RJ54N1_OCLK_DSP, 1, 1);
896
897 /* Enable OCLK */
898 if (!ret)
899 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
900
901 return ret;
902 }
903
rj54n1_reg_init(struct i2c_client * client)904 static int rj54n1_reg_init(struct i2c_client *client)
905 {
906 struct rj54n1 *rj54n1 = to_rj54n1(client);
907 int ret = rj54n1_set_clock(client);
908
909 if (!ret)
910 ret = reg_write_multiple(client, bank_7, ARRAY_SIZE(bank_7));
911 if (!ret)
912 ret = reg_write_multiple(client, bank_10, ARRAY_SIZE(bank_10));
913
914 /* Set binning divisors */
915 if (!ret)
916 ret = reg_write(client, RJ54N1_SCALE_1_2_LEV, 3 | (7 << 4));
917 if (!ret)
918 ret = reg_write(client, RJ54N1_SCALE_4_LEV, 0xf);
919
920 /* Switch to fixed resize mode */
921 if (!ret)
922 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
923 RESIZE_HOLD_SEL | 1);
924
925 /* Set gain */
926 if (!ret)
927 ret = reg_write(client, RJ54N1_Y_GAIN, 0x84);
928
929 /*
930 * Mirror the image back: default is upside down and left-to-right...
931 * Set manual preview / still shot switching
932 */
933 if (!ret)
934 ret = reg_write(client, RJ54N1_MIRROR_STILL_MODE, 0x27);
935
936 if (!ret)
937 ret = reg_write_multiple(client, bank_4, ARRAY_SIZE(bank_4));
938
939 /* Auto exposure area */
940 if (!ret)
941 ret = reg_write(client, RJ54N1_EXPOSURE_CONTROL, 0x80);
942 /* Check current auto WB config */
943 if (!ret)
944 ret = reg_read(client, RJ54N1_WB_SEL_WEIGHT_I);
945 if (ret >= 0) {
946 rj54n1->auto_wb = ret & 0x80;
947 ret = reg_write_multiple(client, bank_5, ARRAY_SIZE(bank_5));
948 }
949 if (!ret)
950 ret = reg_write_multiple(client, bank_8, ARRAY_SIZE(bank_8));
951
952 if (!ret)
953 ret = reg_write(client, RJ54N1_RESET_STANDBY,
954 E_EXCLK | DSP_RSTX | SEN_RSTX);
955
956 /* Commit init */
957 if (!ret)
958 ret = rj54n1_commit(client);
959
960 /* Take DSP, TG, sensor out of reset */
961 if (!ret)
962 ret = reg_write(client, RJ54N1_RESET_STANDBY,
963 E_EXCLK | DSP_RSTX | TG_RSTX | SEN_RSTX);
964
965 /* Start register update? Same register as 0x?FE in many bank_* sets */
966 if (!ret)
967 ret = reg_write(client, RJ54N1_FWFLG, 2);
968
969 /* Constant taken from manufacturer's example */
970 msleep(700);
971
972 return ret;
973 }
974
rj54n1_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * format)975 static int rj54n1_set_fmt(struct v4l2_subdev *sd,
976 struct v4l2_subdev_state *sd_state,
977 struct v4l2_subdev_format *format)
978 {
979 struct v4l2_mbus_framefmt *mf = &format->format;
980 struct i2c_client *client = v4l2_get_subdevdata(sd);
981 struct rj54n1 *rj54n1 = to_rj54n1(client);
982 const struct rj54n1_datafmt *fmt;
983 int output_w, output_h, max_w, max_h,
984 input_w = rj54n1->rect.width, input_h = rj54n1->rect.height;
985 int align = mf->code == MEDIA_BUS_FMT_SBGGR10_1X10 ||
986 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE ||
987 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE ||
988 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE ||
989 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE;
990 int ret;
991
992 if (format->pad)
993 return -EINVAL;
994
995 dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
996 __func__, mf->code, mf->width, mf->height);
997
998 fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
999 ARRAY_SIZE(rj54n1_colour_fmts));
1000 if (!fmt) {
1001 fmt = rj54n1->fmt;
1002 mf->code = fmt->code;
1003 }
1004
1005 mf->field = V4L2_FIELD_NONE;
1006 mf->colorspace = fmt->colorspace;
1007
1008 v4l_bound_align_image(&mf->width, 112, RJ54N1_MAX_WIDTH, align,
1009 &mf->height, 84, RJ54N1_MAX_HEIGHT, align, 0);
1010
1011 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
1012 sd_state->pads->try_fmt = *mf;
1013 return 0;
1014 }
1015
1016 /*
1017 * Verify if the sensor has just been powered on. TODO: replace this
1018 * with proper PM, when a suitable API is available.
1019 */
1020 ret = reg_read(client, RJ54N1_RESET_STANDBY);
1021 if (ret < 0)
1022 return ret;
1023
1024 if (!(ret & E_EXCLK)) {
1025 ret = rj54n1_reg_init(client);
1026 if (ret < 0)
1027 return ret;
1028 }
1029
1030 /* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */
1031 switch (mf->code) {
1032 case MEDIA_BUS_FMT_YUYV8_2X8:
1033 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1034 if (!ret)
1035 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1036 break;
1037 case MEDIA_BUS_FMT_YVYU8_2X8:
1038 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1039 if (!ret)
1040 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1041 break;
1042 case MEDIA_BUS_FMT_RGB565_2X8_LE:
1043 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1044 if (!ret)
1045 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1046 break;
1047 case MEDIA_BUS_FMT_RGB565_2X8_BE:
1048 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1049 if (!ret)
1050 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1051 break;
1052 case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE:
1053 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1054 if (!ret)
1055 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1056 if (!ret)
1057 ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1058 break;
1059 case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE:
1060 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1061 if (!ret)
1062 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1063 if (!ret)
1064 ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1065 break;
1066 case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE:
1067 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1068 if (!ret)
1069 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1070 if (!ret)
1071 ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1072 break;
1073 case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE:
1074 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1075 if (!ret)
1076 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1077 if (!ret)
1078 ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1079 break;
1080 case MEDIA_BUS_FMT_SBGGR10_1X10:
1081 ret = reg_write(client, RJ54N1_OUT_SEL, 5);
1082 break;
1083 default:
1084 ret = -EINVAL;
1085 }
1086
1087 /* Special case: a raw mode with 10 bits of data per clock tick */
1088 if (!ret)
1089 ret = reg_set(client, RJ54N1_OCLK_SEL_EN,
1090 (mf->code == MEDIA_BUS_FMT_SBGGR10_1X10) << 1, 2);
1091
1092 if (ret < 0)
1093 return ret;
1094
1095 /* Supported scales 1:1 >= scale > 1:16 */
1096 max_w = mf->width * (16 * 1024 - 1) / 1024;
1097 if (input_w > max_w)
1098 input_w = max_w;
1099 max_h = mf->height * (16 * 1024 - 1) / 1024;
1100 if (input_h > max_h)
1101 input_h = max_h;
1102
1103 output_w = mf->width;
1104 output_h = mf->height;
1105
1106 ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
1107 if (ret < 0)
1108 return ret;
1109
1110 fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
1111 ARRAY_SIZE(rj54n1_colour_fmts));
1112
1113 rj54n1->fmt = fmt;
1114 rj54n1->resize = ret;
1115 rj54n1->rect.width = input_w;
1116 rj54n1->rect.height = input_h;
1117 rj54n1->width = output_w;
1118 rj54n1->height = output_h;
1119
1120 mf->width = output_w;
1121 mf->height = output_h;
1122 mf->field = V4L2_FIELD_NONE;
1123 mf->colorspace = fmt->colorspace;
1124
1125 return 0;
1126 }
1127
1128 #ifdef CONFIG_VIDEO_ADV_DEBUG
rj54n1_g_register(struct v4l2_subdev * sd,struct v4l2_dbg_register * reg)1129 static int rj54n1_g_register(struct v4l2_subdev *sd,
1130 struct v4l2_dbg_register *reg)
1131 {
1132 struct i2c_client *client = v4l2_get_subdevdata(sd);
1133
1134 if (reg->reg < 0x400 || reg->reg > 0x1fff)
1135 /* Registers > 0x0800 are only available from Sharp support */
1136 return -EINVAL;
1137
1138 reg->size = 1;
1139 reg->val = reg_read(client, reg->reg);
1140
1141 if (reg->val > 0xff)
1142 return -EIO;
1143
1144 return 0;
1145 }
1146
rj54n1_s_register(struct v4l2_subdev * sd,const struct v4l2_dbg_register * reg)1147 static int rj54n1_s_register(struct v4l2_subdev *sd,
1148 const struct v4l2_dbg_register *reg)
1149 {
1150 struct i2c_client *client = v4l2_get_subdevdata(sd);
1151
1152 if (reg->reg < 0x400 || reg->reg > 0x1fff)
1153 /* Registers >= 0x0800 are only available from Sharp support */
1154 return -EINVAL;
1155
1156 if (reg_write(client, reg->reg, reg->val) < 0)
1157 return -EIO;
1158
1159 return 0;
1160 }
1161 #endif
1162
rj54n1_s_power(struct v4l2_subdev * sd,int on)1163 static int rj54n1_s_power(struct v4l2_subdev *sd, int on)
1164 {
1165 struct i2c_client *client = v4l2_get_subdevdata(sd);
1166 struct rj54n1 *rj54n1 = to_rj54n1(client);
1167
1168 if (on) {
1169 if (rj54n1->pwup_gpio)
1170 gpiod_set_value(rj54n1->pwup_gpio, 1);
1171 if (rj54n1->enable_gpio)
1172 gpiod_set_value(rj54n1->enable_gpio, 1);
1173
1174 msleep(1);
1175
1176 return clk_prepare_enable(rj54n1->clk);
1177 }
1178
1179 clk_disable_unprepare(rj54n1->clk);
1180
1181 if (rj54n1->enable_gpio)
1182 gpiod_set_value(rj54n1->enable_gpio, 0);
1183 if (rj54n1->pwup_gpio)
1184 gpiod_set_value(rj54n1->pwup_gpio, 0);
1185
1186 return 0;
1187 }
1188
rj54n1_s_ctrl(struct v4l2_ctrl * ctrl)1189 static int rj54n1_s_ctrl(struct v4l2_ctrl *ctrl)
1190 {
1191 struct rj54n1 *rj54n1 = container_of(ctrl->handler, struct rj54n1, hdl);
1192 struct v4l2_subdev *sd = &rj54n1->subdev;
1193 struct i2c_client *client = v4l2_get_subdevdata(sd);
1194 int data;
1195
1196 switch (ctrl->id) {
1197 case V4L2_CID_VFLIP:
1198 if (ctrl->val)
1199 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 1);
1200 else
1201 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 1, 1);
1202 if (data < 0)
1203 return -EIO;
1204 return 0;
1205 case V4L2_CID_HFLIP:
1206 if (ctrl->val)
1207 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 2);
1208 else
1209 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 2, 2);
1210 if (data < 0)
1211 return -EIO;
1212 return 0;
1213 case V4L2_CID_GAIN:
1214 if (reg_write(client, RJ54N1_Y_GAIN, ctrl->val * 2) < 0)
1215 return -EIO;
1216 return 0;
1217 case V4L2_CID_AUTO_WHITE_BALANCE:
1218 /* Auto WB area - whole image */
1219 if (reg_set(client, RJ54N1_WB_SEL_WEIGHT_I, ctrl->val << 7,
1220 0x80) < 0)
1221 return -EIO;
1222 rj54n1->auto_wb = ctrl->val;
1223 return 0;
1224 }
1225
1226 return -EINVAL;
1227 }
1228
1229 static const struct v4l2_ctrl_ops rj54n1_ctrl_ops = {
1230 .s_ctrl = rj54n1_s_ctrl,
1231 };
1232
1233 static const struct v4l2_subdev_core_ops rj54n1_subdev_core_ops = {
1234 #ifdef CONFIG_VIDEO_ADV_DEBUG
1235 .g_register = rj54n1_g_register,
1236 .s_register = rj54n1_s_register,
1237 #endif
1238 .s_power = rj54n1_s_power,
1239 };
1240
1241 static const struct v4l2_subdev_video_ops rj54n1_subdev_video_ops = {
1242 .s_stream = rj54n1_s_stream,
1243 };
1244
1245 static const struct v4l2_subdev_pad_ops rj54n1_subdev_pad_ops = {
1246 .enum_mbus_code = rj54n1_enum_mbus_code,
1247 .get_selection = rj54n1_get_selection,
1248 .set_selection = rj54n1_set_selection,
1249 .get_fmt = rj54n1_get_fmt,
1250 .set_fmt = rj54n1_set_fmt,
1251 };
1252
1253 static const struct v4l2_subdev_ops rj54n1_subdev_ops = {
1254 .core = &rj54n1_subdev_core_ops,
1255 .video = &rj54n1_subdev_video_ops,
1256 .pad = &rj54n1_subdev_pad_ops,
1257 };
1258
1259 /*
1260 * Interface active, can use i2c. If it fails, it can indeed mean, that
1261 * this wasn't our capture interface, so, we wait for the right one
1262 */
rj54n1_video_probe(struct i2c_client * client,struct rj54n1_pdata * priv)1263 static int rj54n1_video_probe(struct i2c_client *client,
1264 struct rj54n1_pdata *priv)
1265 {
1266 struct rj54n1 *rj54n1 = to_rj54n1(client);
1267 int data1, data2;
1268 int ret;
1269
1270 ret = rj54n1_s_power(&rj54n1->subdev, 1);
1271 if (ret < 0)
1272 return ret;
1273
1274 /* Read out the chip version register */
1275 data1 = reg_read(client, RJ54N1_DEV_CODE);
1276 data2 = reg_read(client, RJ54N1_DEV_CODE2);
1277
1278 if (data1 != 0x51 || data2 != 0x10) {
1279 ret = -ENODEV;
1280 dev_info(&client->dev, "No RJ54N1CB0C found, read 0x%x:0x%x\n",
1281 data1, data2);
1282 goto done;
1283 }
1284
1285 /* Configure IOCTL polarity from the platform data: 0 or 1 << 7. */
1286 ret = reg_write(client, RJ54N1_IOC, priv->ioctl_high << 7);
1287 if (ret < 0)
1288 goto done;
1289
1290 dev_info(&client->dev, "Detected a RJ54N1CB0C chip ID 0x%x:0x%x\n",
1291 data1, data2);
1292
1293 ret = v4l2_ctrl_handler_setup(&rj54n1->hdl);
1294
1295 done:
1296 rj54n1_s_power(&rj54n1->subdev, 0);
1297 return ret;
1298 }
1299
rj54n1_probe(struct i2c_client * client)1300 static int rj54n1_probe(struct i2c_client *client)
1301 {
1302 struct rj54n1 *rj54n1;
1303 struct i2c_adapter *adapter = client->adapter;
1304 struct rj54n1_pdata *rj54n1_priv;
1305 int ret;
1306
1307 if (!client->dev.platform_data) {
1308 dev_err(&client->dev, "RJ54N1CB0C: missing platform data!\n");
1309 return -EINVAL;
1310 }
1311
1312 rj54n1_priv = client->dev.platform_data;
1313
1314 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1315 dev_warn(&adapter->dev,
1316 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
1317 return -EIO;
1318 }
1319
1320 rj54n1 = devm_kzalloc(&client->dev, sizeof(struct rj54n1), GFP_KERNEL);
1321 if (!rj54n1)
1322 return -ENOMEM;
1323
1324 v4l2_i2c_subdev_init(&rj54n1->subdev, client, &rj54n1_subdev_ops);
1325 v4l2_ctrl_handler_init(&rj54n1->hdl, 4);
1326 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1327 V4L2_CID_VFLIP, 0, 1, 1, 0);
1328 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1329 V4L2_CID_HFLIP, 0, 1, 1, 0);
1330 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1331 V4L2_CID_GAIN, 0, 127, 1, 66);
1332 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1333 V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1334 rj54n1->subdev.ctrl_handler = &rj54n1->hdl;
1335 if (rj54n1->hdl.error)
1336 return rj54n1->hdl.error;
1337
1338 rj54n1->clk_div = clk_div;
1339 rj54n1->rect.left = RJ54N1_COLUMN_SKIP;
1340 rj54n1->rect.top = RJ54N1_ROW_SKIP;
1341 rj54n1->rect.width = RJ54N1_MAX_WIDTH;
1342 rj54n1->rect.height = RJ54N1_MAX_HEIGHT;
1343 rj54n1->width = RJ54N1_MAX_WIDTH;
1344 rj54n1->height = RJ54N1_MAX_HEIGHT;
1345 rj54n1->fmt = &rj54n1_colour_fmts[0];
1346 rj54n1->resize = 1024;
1347 rj54n1->tgclk_mhz = (rj54n1_priv->mclk_freq / PLL_L * PLL_N) /
1348 (clk_div.ratio_tg + 1) / (clk_div.ratio_t + 1);
1349
1350 rj54n1->clk = clk_get(&client->dev, NULL);
1351 if (IS_ERR(rj54n1->clk)) {
1352 ret = PTR_ERR(rj54n1->clk);
1353 goto err_free_ctrl;
1354 }
1355
1356 rj54n1->pwup_gpio = gpiod_get_optional(&client->dev, "powerup",
1357 GPIOD_OUT_LOW);
1358 if (IS_ERR(rj54n1->pwup_gpio)) {
1359 dev_info(&client->dev, "Unable to get GPIO \"powerup\": %ld\n",
1360 PTR_ERR(rj54n1->pwup_gpio));
1361 ret = PTR_ERR(rj54n1->pwup_gpio);
1362 goto err_clk_put;
1363 }
1364
1365 rj54n1->enable_gpio = gpiod_get_optional(&client->dev, "enable",
1366 GPIOD_OUT_LOW);
1367 if (IS_ERR(rj54n1->enable_gpio)) {
1368 dev_info(&client->dev, "Unable to get GPIO \"enable\": %ld\n",
1369 PTR_ERR(rj54n1->enable_gpio));
1370 ret = PTR_ERR(rj54n1->enable_gpio);
1371 goto err_gpio_put;
1372 }
1373
1374 ret = rj54n1_video_probe(client, rj54n1_priv);
1375 if (ret < 0)
1376 goto err_gpio_put;
1377
1378 ret = v4l2_async_register_subdev(&rj54n1->subdev);
1379 if (ret)
1380 goto err_gpio_put;
1381
1382 return 0;
1383
1384 err_gpio_put:
1385 if (rj54n1->enable_gpio)
1386 gpiod_put(rj54n1->enable_gpio);
1387
1388 if (rj54n1->pwup_gpio)
1389 gpiod_put(rj54n1->pwup_gpio);
1390
1391 err_clk_put:
1392 clk_put(rj54n1->clk);
1393
1394 err_free_ctrl:
1395 v4l2_ctrl_handler_free(&rj54n1->hdl);
1396
1397 return ret;
1398 }
1399
rj54n1_remove(struct i2c_client * client)1400 static void rj54n1_remove(struct i2c_client *client)
1401 {
1402 struct rj54n1 *rj54n1 = to_rj54n1(client);
1403
1404 if (rj54n1->enable_gpio)
1405 gpiod_put(rj54n1->enable_gpio);
1406 if (rj54n1->pwup_gpio)
1407 gpiod_put(rj54n1->pwup_gpio);
1408
1409 clk_put(rj54n1->clk);
1410 v4l2_ctrl_handler_free(&rj54n1->hdl);
1411 v4l2_async_unregister_subdev(&rj54n1->subdev);
1412 }
1413
1414 static const struct i2c_device_id rj54n1_id[] = {
1415 { "rj54n1cb0c", 0 },
1416 { }
1417 };
1418 MODULE_DEVICE_TABLE(i2c, rj54n1_id);
1419
1420 static struct i2c_driver rj54n1_i2c_driver = {
1421 .driver = {
1422 .name = "rj54n1cb0c",
1423 },
1424 .probe = rj54n1_probe,
1425 .remove = rj54n1_remove,
1426 .id_table = rj54n1_id,
1427 };
1428
1429 module_i2c_driver(rj54n1_i2c_driver);
1430
1431 MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver");
1432 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1433 MODULE_LICENSE("GPL v2");
1434