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arm64: futex: Avoid copying out uninitialised stack in failed cmpxchg()
[linux/fpc-iii.git] / drivers / media / i2c / mt9t112.c
blobaf8cca9842154cd70082b06025b74c6325dfbeee
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * mt9t112 Camera Driver
4 *
5 * Copyright (C) 2018 Jacopo Mondi <jacopo+renesas@jmondi.org>
6 *
7 * Copyright (C) 2009 Renesas Solutions Corp.
8 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
9 *
10 * Based on ov772x driver, mt9m111 driver,
11 *
12 * Copyright (C) 2008 Kuninori Morimoto <morimoto.kuninori@renesas.com>
13 * Copyright (C) 2008, Robert Jarzmik <robert.jarzmik@free.fr>
14 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
15 * Copyright (C) 2008 Magnus Damm
16 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
17 *
18 * TODO: This driver lacks support for frame rate control due to missing
19 * register level documentation and suitable hardware for testing.
20 * v4l-utils compliance tools will report errors.
21 */
22
23 #include <linux/clk.h>
24 #include <linux/delay.h>
25 #include <linux/gpio/consumer.h>
26 #include <linux/i2c.h>
27 #include <linux/init.h>
28 #include <linux/module.h>
29 #include <linux/slab.h>
30 #include <linux/v4l2-mediabus.h>
31 #include <linux/videodev2.h>
32
33 #include <media/i2c/mt9t112.h>
34 #include <media/v4l2-common.h>
35 #include <media/v4l2-image-sizes.h>
36 #include <media/v4l2-subdev.h>
37
38 /* you can check PLL/clock info */
39 /* #define EXT_CLOCK 24000000 */
40
41 /************************************************************************
42 * macro
43 ***********************************************************************/
44 /*
45 * frame size
46 */
47 #define MAX_WIDTH 2048
48 #define MAX_HEIGHT 1536
49
50 /*
51 * macro of read/write
52 */
53 #define ECHECKER(ret, x) \
54 do { \
55 (ret) = (x); \
56 if ((ret) < 0) \
57 return (ret); \
58 } while (0)
59
60 #define mt9t112_reg_write(ret, client, a, b) \
61 ECHECKER(ret, __mt9t112_reg_write(client, a, b))
62 #define mt9t112_mcu_write(ret, client, a, b) \
63 ECHECKER(ret, __mt9t112_mcu_write(client, a, b))
64
65 #define mt9t112_reg_mask_set(ret, client, a, b, c) \
66 ECHECKER(ret, __mt9t112_reg_mask_set(client, a, b, c))
67 #define mt9t112_mcu_mask_set(ret, client, a, b, c) \
68 ECHECKER(ret, __mt9t112_mcu_mask_set(client, a, b, c))
69
70 #define mt9t112_reg_read(ret, client, a) \
71 ECHECKER(ret, __mt9t112_reg_read(client, a))
72
73 /*
74 * Logical address
75 */
76 #define _VAR(id, offset, base) (base | (id & 0x1f) << 10 | (offset & 0x3ff))
77 #define VAR(id, offset) _VAR(id, offset, 0x0000)
78 #define VAR8(id, offset) _VAR(id, offset, 0x8000)
79
80 /************************************************************************
81 * struct
82 ***********************************************************************/
83 struct mt9t112_format {
84 u32 code;
85 enum v4l2_colorspace colorspace;
86 u16 fmt;
87 u16 order;
88 };
89
90 struct mt9t112_priv {
91 struct v4l2_subdev subdev;
92 struct mt9t112_platform_data *info;
93 struct i2c_client *client;
94 struct v4l2_rect frame;
95 struct clk *clk;
96 struct gpio_desc *standby_gpio;
97 const struct mt9t112_format *format;
98 int num_formats;
99 bool init_done;
100 };
101
102 /************************************************************************
103 * supported format
104 ***********************************************************************/
105
106 static const struct mt9t112_format mt9t112_cfmts[] = {
107 {
108 .code = MEDIA_BUS_FMT_UYVY8_2X8,
109 .colorspace = V4L2_COLORSPACE_SRGB,
110 .fmt = 1,
111 .order = 0,
112 }, {
113 .code = MEDIA_BUS_FMT_VYUY8_2X8,
114 .colorspace = V4L2_COLORSPACE_SRGB,
115 .fmt = 1,
116 .order = 1,
117 }, {
118 .code = MEDIA_BUS_FMT_YUYV8_2X8,
119 .colorspace = V4L2_COLORSPACE_SRGB,
120 .fmt = 1,
121 .order = 2,
122 }, {
123 .code = MEDIA_BUS_FMT_YVYU8_2X8,
124 .colorspace = V4L2_COLORSPACE_SRGB,
125 .fmt = 1,
126 .order = 3,
127 }, {
128 .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
129 .colorspace = V4L2_COLORSPACE_SRGB,
130 .fmt = 8,
131 .order = 2,
132 }, {
133 .code = MEDIA_BUS_FMT_RGB565_2X8_LE,
134 .colorspace = V4L2_COLORSPACE_SRGB,
135 .fmt = 4,
136 .order = 2,
137 },
138 };
139
140 /************************************************************************
141 * general function
142 ***********************************************************************/
143 static struct mt9t112_priv *to_mt9t112(const struct i2c_client *client)
144 {
145 return container_of(i2c_get_clientdata(client),
146 struct mt9t112_priv,
147 subdev);
148 }
149
150 static int __mt9t112_reg_read(const struct i2c_client *client, u16 command)
151 {
152 struct i2c_msg msg[2];
153 u8 buf[2];
154 int ret;
155
156 command = swab16(command);
157
158 msg[0].addr = client->addr;
159 msg[0].flags = 0;
160 msg[0].len = 2;
161 msg[0].buf = (u8 *)&command;
162
163 msg[1].addr = client->addr;
164 msg[1].flags = I2C_M_RD;
165 msg[1].len = 2;
166 msg[1].buf = buf;
167
168 /*
169 * If return value of this function is < 0, it means error, else,
170 * below 16bit is valid data.
171 */
172 ret = i2c_transfer(client->adapter, msg, 2);
173 if (ret < 0)
174 return ret;
175
176 memcpy(&ret, buf, 2);
177
178 return swab16(ret);
179 }
180
181 static int __mt9t112_reg_write(const struct i2c_client *client,
182 u16 command, u16 data)
183 {
184 struct i2c_msg msg;
185 u8 buf[4];
186 int ret;
187
188 command = swab16(command);
189 data = swab16(data);
190
191 memcpy(buf + 0, &command, 2);
192 memcpy(buf + 2, &data, 2);
193
194 msg.addr = client->addr;
195 msg.flags = 0;
196 msg.len = 4;
197 msg.buf = buf;
198
199 /*
200 * i2c_transfer return message length, but this function should
201 * return 0 if correct case.
202 */
203 ret = i2c_transfer(client->adapter, &msg, 1);
204
205 return ret >= 0 ? 0 : ret;
206 }
207
208 static int __mt9t112_reg_mask_set(const struct i2c_client *client,
209 u16 command, u16 mask, u16 set)
210 {
211 int val = __mt9t112_reg_read(client, command);
212
213 if (val < 0)
214 return val;
215
216 val &= ~mask;
217 val |= set & mask;
218
219 return __mt9t112_reg_write(client, command, val);
220 }
221
222 /* mcu access */
223 static int __mt9t112_mcu_read(const struct i2c_client *client, u16 command)
224 {
225 int ret;
226
227 ret = __mt9t112_reg_write(client, 0x098E, command);
228 if (ret < 0)
229 return ret;
230
231 return __mt9t112_reg_read(client, 0x0990);
232 }
233
234 static int __mt9t112_mcu_write(const struct i2c_client *client,
235 u16 command, u16 data)
236 {
237 int ret;
238
239 ret = __mt9t112_reg_write(client, 0x098E, command);
240 if (ret < 0)
241 return ret;
242
243 return __mt9t112_reg_write(client, 0x0990, data);
244 }
245
246 static int __mt9t112_mcu_mask_set(const struct i2c_client *client,
247 u16 command, u16 mask, u16 set)
248 {
249 int val = __mt9t112_mcu_read(client, command);
250
251 if (val < 0)
252 return val;
253
254 val &= ~mask;
255 val |= set & mask;
256
257 return __mt9t112_mcu_write(client, command, val);
258 }
259
260 static int mt9t112_reset(const struct i2c_client *client)
261 {
262 int ret;
263
264 mt9t112_reg_mask_set(ret, client, 0x001a, 0x0001, 0x0001);
265 usleep_range(1000, 5000);
266 mt9t112_reg_mask_set(ret, client, 0x001a, 0x0001, 0x0000);
267
268 return ret;
269 }
270
271 #ifndef EXT_CLOCK
272 #define CLOCK_INFO(a, b)
273 #else
274 #define CLOCK_INFO(a, b) mt9t112_clock_info(a, b)
275 static int mt9t112_clock_info(const struct i2c_client *client, u32 ext)
276 {
277 int m, n, p1, p2, p3, p4, p5, p6, p7;
278 u32 vco, clk;
279 char *enable;
280
281 ext /= 1000; /* kbyte order */
282
283 mt9t112_reg_read(n, client, 0x0012);
284 p1 = n & 0x000f;
285 n = n >> 4;
286 p2 = n & 0x000f;
287 n = n >> 4;
288 p3 = n & 0x000f;
289
290 mt9t112_reg_read(n, client, 0x002a);
291 p4 = n & 0x000f;
292 n = n >> 4;
293 p5 = n & 0x000f;
294 n = n >> 4;
295 p6 = n & 0x000f;
296
297 mt9t112_reg_read(n, client, 0x002c);
298 p7 = n & 0x000f;
299
300 mt9t112_reg_read(n, client, 0x0010);
301 m = n & 0x00ff;
302 n = (n >> 8) & 0x003f;
303
304 enable = ((ext < 6000) || (ext > 54000)) ? "X" : "";
305 dev_dbg(&client->dev, "EXTCLK : %10u K %s\n", ext, enable);
306
307 vco = 2 * m * ext / (n + 1);
308 enable = ((vco < 384000) || (vco > 768000)) ? "X" : "";
309 dev_dbg(&client->dev, "VCO : %10u K %s\n", vco, enable);
310
311 clk = vco / (p1 + 1) / (p2 + 1);
312 enable = (clk > 96000) ? "X" : "";
313 dev_dbg(&client->dev, "PIXCLK : %10u K %s\n", clk, enable);
314
315 clk = vco / (p3 + 1);
316 enable = (clk > 768000) ? "X" : "";
317 dev_dbg(&client->dev, "MIPICLK : %10u K %s\n", clk, enable);
318
319 clk = vco / (p6 + 1);
320 enable = (clk > 96000) ? "X" : "";
321 dev_dbg(&client->dev, "MCU CLK : %10u K %s\n", clk, enable);
322
323 clk = vco / (p5 + 1);
324 enable = (clk > 54000) ? "X" : "";
325 dev_dbg(&client->dev, "SOC CLK : %10u K %s\n", clk, enable);
326
327 clk = vco / (p4 + 1);
328 enable = (clk > 70000) ? "X" : "";
329 dev_dbg(&client->dev, "Sensor CLK : %10u K %s\n", clk, enable);
330
331 clk = vco / (p7 + 1);
332 dev_dbg(&client->dev, "External sensor : %10u K\n", clk);
333
334 clk = ext / (n + 1);
335 enable = ((clk < 2000) || (clk > 24000)) ? "X" : "";
336 dev_dbg(&client->dev, "PFD : %10u K %s\n", clk, enable);
337
338 return 0;
339 }
340 #endif
341
342 static int mt9t112_set_a_frame_size(const struct i2c_client *client,
343 u16 width, u16 height)
344 {
345 int ret;
346 u16 wstart = (MAX_WIDTH - width) / 2;
347 u16 hstart = (MAX_HEIGHT - height) / 2;
348
349 /* (Context A) Image Width/Height. */
350 mt9t112_mcu_write(ret, client, VAR(26, 0), width);
351 mt9t112_mcu_write(ret, client, VAR(26, 2), height);
352
353 /* (Context A) Output Width/Height. */
354 mt9t112_mcu_write(ret, client, VAR(18, 43), 8 + width);
355 mt9t112_mcu_write(ret, client, VAR(18, 45), 8 + height);
356
357 /* (Context A) Start Row/Column. */
358 mt9t112_mcu_write(ret, client, VAR(18, 2), 4 + hstart);
359 mt9t112_mcu_write(ret, client, VAR(18, 4), 4 + wstart);
360
361 /* (Context A) End Row/Column. */
362 mt9t112_mcu_write(ret, client, VAR(18, 6), 11 + height + hstart);
363 mt9t112_mcu_write(ret, client, VAR(18, 8), 11 + width + wstart);
364
365 mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x06);
366
367 return ret;
368 }
369
370 static int mt9t112_set_pll_dividers(const struct i2c_client *client,
371 u8 m, u8 n, u8 p1, u8 p2, u8 p3, u8 p4,
372 u8 p5, u8 p6, u8 p7)
373 {
374 int ret;
375 u16 val;
376
377 /* N/M */
378 val = (n << 8) | (m << 0);
379 mt9t112_reg_mask_set(ret, client, 0x0010, 0x3fff, val);
380
381 /* P1/P2/P3 */
382 val = ((p3 & 0x0F) << 8) | ((p2 & 0x0F) << 4) | ((p1 & 0x0F) << 0);
383 mt9t112_reg_mask_set(ret, client, 0x0012, 0x0fff, val);
384
385 /* P4/P5/P6 */
386 val = (0x7 << 12) | ((p6 & 0x0F) << 8) | ((p5 & 0x0F) << 4) |
387 ((p4 & 0x0F) << 0);
388 mt9t112_reg_mask_set(ret, client, 0x002A, 0x7fff, val);
389
390 /* P7 */
391 val = (0x1 << 12) | ((p7 & 0x0F) << 0);
392 mt9t112_reg_mask_set(ret, client, 0x002C, 0x100f, val);
393
394 return ret;
395 }
396
397 static int mt9t112_init_pll(const struct i2c_client *client)
398 {
399 struct mt9t112_priv *priv = to_mt9t112(client);
400 int data, i, ret;
401
402 mt9t112_reg_mask_set(ret, client, 0x0014, 0x003, 0x0001);
403
404 /* PLL control: BYPASS PLL = 8517. */
405 mt9t112_reg_write(ret, client, 0x0014, 0x2145);
406
407 /* Replace these registers when new timing parameters are generated. */
408 mt9t112_set_pll_dividers(client,
409 priv->info->divider.m, priv->info->divider.n,
410 priv->info->divider.p1, priv->info->divider.p2,
411 priv->info->divider.p3, priv->info->divider.p4,
412 priv->info->divider.p5, priv->info->divider.p6,
413 priv->info->divider.p7);
414
415 /*
416 * TEST_BYPASS on
417 * PLL_ENABLE on
418 * SEL_LOCK_DET on
419 * TEST_BYPASS off
420 */
421 mt9t112_reg_write(ret, client, 0x0014, 0x2525);
422 mt9t112_reg_write(ret, client, 0x0014, 0x2527);
423 mt9t112_reg_write(ret, client, 0x0014, 0x3427);
424 mt9t112_reg_write(ret, client, 0x0014, 0x3027);
425
426 mdelay(10);
427
428 /*
429 * PLL_BYPASS off
430 * Reference clock count
431 * I2C Master Clock Divider
432 */
433 mt9t112_reg_write(ret, client, 0x0014, 0x3046);
434 /* JPEG initialization workaround */
435 mt9t112_reg_write(ret, client, 0x0016, 0x0400);
436 mt9t112_reg_write(ret, client, 0x0022, 0x0190);
437 mt9t112_reg_write(ret, client, 0x3B84, 0x0212);
438
439 /* External sensor clock is PLL bypass. */
440 mt9t112_reg_write(ret, client, 0x002E, 0x0500);
441
442 mt9t112_reg_mask_set(ret, client, 0x0018, 0x0002, 0x0002);
443 mt9t112_reg_mask_set(ret, client, 0x3B82, 0x0004, 0x0004);
444
445 /* MCU disabled. */
446 mt9t112_reg_mask_set(ret, client, 0x0018, 0x0004, 0x0004);
447
448 /* Out of standby. */
449 mt9t112_reg_mask_set(ret, client, 0x0018, 0x0001, 0);
450
451 mdelay(50);
452
453 /*
454 * Standby Workaround
455 * Disable Secondary I2C Pads
456 */
457 mt9t112_reg_write(ret, client, 0x0614, 0x0001);
458 mdelay(1);
459 mt9t112_reg_write(ret, client, 0x0614, 0x0001);
460 mdelay(1);
461 mt9t112_reg_write(ret, client, 0x0614, 0x0001);
462 mdelay(1);
463 mt9t112_reg_write(ret, client, 0x0614, 0x0001);
464 mdelay(1);
465 mt9t112_reg_write(ret, client, 0x0614, 0x0001);
466 mdelay(1);
467 mt9t112_reg_write(ret, client, 0x0614, 0x0001);
468 mdelay(1);
469
470 /* Poll to verify out of standby. Must Poll this bit. */
471 for (i = 0; i < 100; i++) {
472 mt9t112_reg_read(data, client, 0x0018);
473 if (!(data & 0x4000))
474 break;
475
476 mdelay(10);
477 }
478
479 return ret;
480 }
481
482 static int mt9t112_init_setting(const struct i2c_client *client)
483 {
484 int ret;
485
486 /* Adaptive Output Clock (A) */
487 mt9t112_mcu_mask_set(ret, client, VAR(26, 160), 0x0040, 0x0000);
488
489 /* Read Mode (A) */
490 mt9t112_mcu_write(ret, client, VAR(18, 12), 0x0024);
491
492 /* Fine Correction (A) */
493 mt9t112_mcu_write(ret, client, VAR(18, 15), 0x00CC);
494
495 /* Fine IT Min (A) */
496 mt9t112_mcu_write(ret, client, VAR(18, 17), 0x01f1);
497
498 /* Fine IT Max Margin (A) */
499 mt9t112_mcu_write(ret, client, VAR(18, 19), 0x00fF);
500
501 /* Base Frame Lines (A) */
502 mt9t112_mcu_write(ret, client, VAR(18, 29), 0x032D);
503
504 /* Min Line Length (A) */
505 mt9t112_mcu_write(ret, client, VAR(18, 31), 0x073a);
506
507 /* Line Length (A) */
508 mt9t112_mcu_write(ret, client, VAR(18, 37), 0x07d0);
509
510 /* Adaptive Output Clock (B) */
511 mt9t112_mcu_mask_set(ret, client, VAR(27, 160), 0x0040, 0x0000);
512
513 /* Row Start (B) */
514 mt9t112_mcu_write(ret, client, VAR(18, 74), 0x004);
515
516 /* Column Start (B) */
517 mt9t112_mcu_write(ret, client, VAR(18, 76), 0x004);
518
519 /* Row End (B) */
520 mt9t112_mcu_write(ret, client, VAR(18, 78), 0x60B);
521
522 /* Column End (B) */
523 mt9t112_mcu_write(ret, client, VAR(18, 80), 0x80B);
524
525 /* Fine Correction (B) */
526 mt9t112_mcu_write(ret, client, VAR(18, 87), 0x008C);
527
528 /* Fine IT Min (B) */
529 mt9t112_mcu_write(ret, client, VAR(18, 89), 0x01F1);
530
531 /* Fine IT Max Margin (B) */
532 mt9t112_mcu_write(ret, client, VAR(18, 91), 0x00FF);
533
534 /* Base Frame Lines (B) */
535 mt9t112_mcu_write(ret, client, VAR(18, 101), 0x0668);
536
537 /* Min Line Length (B) */
538 mt9t112_mcu_write(ret, client, VAR(18, 103), 0x0AF0);
539
540 /* Line Length (B) */
541 mt9t112_mcu_write(ret, client, VAR(18, 109), 0x0AF0);
542
543 /*
544 * Flicker Dectection registers.
545 * This section should be replaced whenever new timing file is
546 * generated. All the following registers need to be replaced.
547 * Following registers are generated from Register Wizard but user can
548 * modify them. For detail see auto flicker detection tuning.
549 */
550
551 /* FD_FDPERIOD_SELECT */
552 mt9t112_mcu_write(ret, client, VAR8(8, 5), 0x01);
553
554 /* PRI_B_CONFIG_FD_ALGO_RUN */
555 mt9t112_mcu_write(ret, client, VAR(27, 17), 0x0003);
556
557 /* PRI_A_CONFIG_FD_ALGO_RUN */
558 mt9t112_mcu_write(ret, client, VAR(26, 17), 0x0003);
559
560 /*
561 * AFD range detection tuning registers.
562 */
563
564 /* Search_f1_50 */
565 mt9t112_mcu_write(ret, client, VAR8(18, 165), 0x25);
566
567 /* Search_f2_50 */
568 mt9t112_mcu_write(ret, client, VAR8(18, 166), 0x28);
569
570 /* Search_f1_60 */
571 mt9t112_mcu_write(ret, client, VAR8(18, 167), 0x2C);
572
573 /* Search_f2_60 */
574 mt9t112_mcu_write(ret, client, VAR8(18, 168), 0x2F);
575
576 /* Period_50Hz (A) */
577 mt9t112_mcu_write(ret, client, VAR8(18, 68), 0xBA);
578
579 /* Secret register by Aptina. */
580 /* Period_50Hz (A MSB) */
581 mt9t112_mcu_write(ret, client, VAR8(18, 303), 0x00);
582
583 /* Period_60Hz (A) */
584 mt9t112_mcu_write(ret, client, VAR8(18, 69), 0x9B);
585
586 /* Secret register by Aptina. */
587 /* Period_60Hz (A MSB) */
588 mt9t112_mcu_write(ret, client, VAR8(18, 301), 0x00);
589
590 /* Period_50Hz (B) */
591 mt9t112_mcu_write(ret, client, VAR8(18, 140), 0x82);
592
593 /* Secret register by Aptina. */
594 /* Period_50Hz (B) MSB */
595 mt9t112_mcu_write(ret, client, VAR8(18, 304), 0x00);
596
597 /* Period_60Hz (B) */
598 mt9t112_mcu_write(ret, client, VAR8(18, 141), 0x6D);
599
600 /* Secret register by Aptina. */
601 /* Period_60Hz (B) MSB */
602 mt9t112_mcu_write(ret, client, VAR8(18, 302), 0x00);
603
604 /* FD Mode */
605 mt9t112_mcu_write(ret, client, VAR8(8, 2), 0x10);
606
607 /* Stat_min */
608 mt9t112_mcu_write(ret, client, VAR8(8, 9), 0x02);
609
610 /* Stat_max */
611 mt9t112_mcu_write(ret, client, VAR8(8, 10), 0x03);
612
613 /* Min_amplitude */
614 mt9t112_mcu_write(ret, client, VAR8(8, 12), 0x0A);
615
616 /* RX FIFO Watermark (A) */
617 mt9t112_mcu_write(ret, client, VAR(18, 70), 0x0014);
618
619 /* RX FIFO Watermark (B) */
620 mt9t112_mcu_write(ret, client, VAR(18, 142), 0x0014);
621
622 /* MCLK: 16MHz
623 * PCLK: 73MHz
624 * CorePixCLK: 36.5 MHz
625 */
626 mt9t112_mcu_write(ret, client, VAR8(18, 0x0044), 133);
627 mt9t112_mcu_write(ret, client, VAR8(18, 0x0045), 110);
628 mt9t112_mcu_write(ret, client, VAR8(18, 0x008c), 130);
629 mt9t112_mcu_write(ret, client, VAR8(18, 0x008d), 108);
630
631 mt9t112_mcu_write(ret, client, VAR8(18, 0x00A5), 27);
632 mt9t112_mcu_write(ret, client, VAR8(18, 0x00a6), 30);
633 mt9t112_mcu_write(ret, client, VAR8(18, 0x00a7), 32);
634 mt9t112_mcu_write(ret, client, VAR8(18, 0x00a8), 35);
635
636 return ret;
637 }
638
639 static int mt9t112_auto_focus_setting(const struct i2c_client *client)
640 {
641 int ret;
642
643 mt9t112_mcu_write(ret, client, VAR(12, 13), 0x000F);
644 mt9t112_mcu_write(ret, client, VAR(12, 23), 0x0F0F);
645 mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x06);
646
647 mt9t112_reg_write(ret, client, 0x0614, 0x0000);
648
649 mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x05);
650 mt9t112_mcu_write(ret, client, VAR8(12, 2), 0x02);
651 mt9t112_mcu_write(ret, client, VAR(12, 3), 0x0002);
652 mt9t112_mcu_write(ret, client, VAR(17, 3), 0x8001);
653 mt9t112_mcu_write(ret, client, VAR(17, 11), 0x0025);
654 mt9t112_mcu_write(ret, client, VAR(17, 13), 0x0193);
655 mt9t112_mcu_write(ret, client, VAR8(17, 33), 0x18);
656 mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x05);
657
658 return ret;
659 }
660
661 static int mt9t112_auto_focus_trigger(const struct i2c_client *client)
662 {
663 int ret;
664
665 mt9t112_mcu_write(ret, client, VAR8(12, 25), 0x01);
666
667 return ret;
668 }
669
670 static int mt9t112_init_camera(const struct i2c_client *client)
671 {
672 int ret;
673
674 ECHECKER(ret, mt9t112_reset(client));
675 ECHECKER(ret, mt9t112_init_pll(client));
676 ECHECKER(ret, mt9t112_init_setting(client));
677 ECHECKER(ret, mt9t112_auto_focus_setting(client));
678
679 mt9t112_reg_mask_set(ret, client, 0x0018, 0x0004, 0);
680
681 /* Analog setting B.*/
682 mt9t112_reg_write(ret, client, 0x3084, 0x2409);
683 mt9t112_reg_write(ret, client, 0x3092, 0x0A49);
684 mt9t112_reg_write(ret, client, 0x3094, 0x4949);
685 mt9t112_reg_write(ret, client, 0x3096, 0x4950);
686
687 /*
688 * Disable adaptive clock.
689 * PRI_A_CONFIG_JPEG_OB_TX_CONTROL_VAR
690 * PRI_B_CONFIG_JPEG_OB_TX_CONTROL_VAR
691 */
692 mt9t112_mcu_write(ret, client, VAR(26, 160), 0x0A2E);
693 mt9t112_mcu_write(ret, client, VAR(27, 160), 0x0A2E);
694
695 /*
696 * Configure Status in Status_before_length Format and enable header.
697 * PRI_B_CONFIG_JPEG_OB_TX_CONTROL_VAR
698 */
699 mt9t112_mcu_write(ret, client, VAR(27, 144), 0x0CB4);
700
701 /*
702 * Enable JPEG in context B.
703 * PRI_B_CONFIG_JPEG_OB_TX_CONTROL_VAR
704 */
705 mt9t112_mcu_write(ret, client, VAR8(27, 142), 0x01);
706
707 /* Disable Dac_TXLO. */
708 mt9t112_reg_write(ret, client, 0x316C, 0x350F);
709
710 /* Set max slew rates. */
711 mt9t112_reg_write(ret, client, 0x1E, 0x777);
712
713 return ret;
714 }
715
716 /************************************************************************
717 * v4l2_subdev_core_ops
718 ***********************************************************************/
719
720 #ifdef CONFIG_VIDEO_ADV_DEBUG
721 static int mt9t112_g_register(struct v4l2_subdev *sd,
722 struct v4l2_dbg_register *reg)
723 {
724 struct i2c_client *client = v4l2_get_subdevdata(sd);
725 int ret;
726
727 reg->size = 2;
728 mt9t112_reg_read(ret, client, reg->reg);
729
730 reg->val = (__u64)ret;
731
732 return 0;
733 }
734
735 static int mt9t112_s_register(struct v4l2_subdev *sd,
736 const struct v4l2_dbg_register *reg)
737 {
738 struct i2c_client *client = v4l2_get_subdevdata(sd);
739 int ret;
740
741 mt9t112_reg_write(ret, client, reg->reg, reg->val);
742
743 return ret;
744 }
745 #endif
746
747 static int mt9t112_power_on(struct mt9t112_priv *priv)
748 {
749 int ret;
750
751 ret = clk_prepare_enable(priv->clk);
752 if (ret)
753 return ret;
754
755 if (priv->standby_gpio) {
756 gpiod_set_value(priv->standby_gpio, 0);
757 msleep(100);
758 }
759
760 return 0;
761 }
762
763 static int mt9t112_power_off(struct mt9t112_priv *priv)
764 {
765 clk_disable_unprepare(priv->clk);
766 if (priv->standby_gpio) {
767 gpiod_set_value(priv->standby_gpio, 1);
768 msleep(100);
769 }
770
771 return 0;
772 }
773
774 static int mt9t112_s_power(struct v4l2_subdev *sd, int on)
775 {
776 struct i2c_client *client = v4l2_get_subdevdata(sd);
777 struct mt9t112_priv *priv = to_mt9t112(client);
778
779 return on ? mt9t112_power_on(priv) :
780 mt9t112_power_off(priv);
781 }
782
783 static const struct v4l2_subdev_core_ops mt9t112_subdev_core_ops = {
784 #ifdef CONFIG_VIDEO_ADV_DEBUG
785 .g_register = mt9t112_g_register,
786 .s_register = mt9t112_s_register,
787 #endif
788 .s_power = mt9t112_s_power,
789 };
790
791 /************************************************************************
792 * v4l2_subdev_video_ops
793 **********************************************************************/
794 static int mt9t112_s_stream(struct v4l2_subdev *sd, int enable)
795 {
796 struct i2c_client *client = v4l2_get_subdevdata(sd);
797 struct mt9t112_priv *priv = to_mt9t112(client);
798 int ret = 0;
799
800 if (!enable) {
801 /* FIXME
802 *
803 * If user selected large output size, and used it long time,
804 * mt9t112 camera will be very warm.
805 *
806 * But current driver can not stop mt9t112 camera.
807 * So, set small size here to solve this problem.
808 */
809 mt9t112_set_a_frame_size(client, VGA_WIDTH, VGA_HEIGHT);
810 return ret;
811 }
812
813 if (!priv->init_done) {
814 u16 param = MT9T112_FLAG_PCLK_RISING_EDGE & priv->info->flags ?
815 0x0001 : 0x0000;
816
817 ECHECKER(ret, mt9t112_init_camera(client));
818
819 /* Invert PCLK (Data sampled on falling edge of pixclk). */
820 mt9t112_reg_write(ret, client, 0x3C20, param);
821
822 mdelay(5);
823
824 priv->init_done = true;
825 }
826
827 mt9t112_mcu_write(ret, client, VAR(26, 7), priv->format->fmt);
828 mt9t112_mcu_write(ret, client, VAR(26, 9), priv->format->order);
829 mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x06);
830
831 mt9t112_set_a_frame_size(client, priv->frame.width, priv->frame.height);
832
833 ECHECKER(ret, mt9t112_auto_focus_trigger(client));
834
835 dev_dbg(&client->dev, "format : %d\n", priv->format->code);
836 dev_dbg(&client->dev, "size : %d x %d\n",
837 priv->frame.width,
838 priv->frame.height);
839
840 CLOCK_INFO(client, EXT_CLOCK);
841
842 return ret;
843 }
844
845 static int mt9t112_set_params(struct mt9t112_priv *priv,
846 const struct v4l2_rect *rect,
847 u32 code)
848 {
849 int i;
850
851 /*
852 * get color format
853 */
854 for (i = 0; i < priv->num_formats; i++)
855 if (mt9t112_cfmts[i].code == code)
856 break;
857
858 if (i == priv->num_formats)
859 return -EINVAL;
860
861 priv->frame = *rect;
862
863 /*
864 * frame size check
865 */
866 v4l_bound_align_image(&priv->frame.width, 0, MAX_WIDTH, 0,
867 &priv->frame.height, 0, MAX_HEIGHT, 0, 0);
868
869 priv->format = mt9t112_cfmts + i;
870
871 return 0;
872 }
873
874 static int mt9t112_get_selection(struct v4l2_subdev *sd,
875 struct v4l2_subdev_pad_config *cfg,
876 struct v4l2_subdev_selection *sel)
877 {
878 struct i2c_client *client = v4l2_get_subdevdata(sd);
879 struct mt9t112_priv *priv = to_mt9t112(client);
880
881 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
882 return -EINVAL;
883
884 switch (sel->target) {
885 case V4L2_SEL_TGT_CROP_BOUNDS:
886 sel->r.left = 0;
887 sel->r.top = 0;
888 sel->r.width = MAX_WIDTH;
889 sel->r.height = MAX_HEIGHT;
890 return 0;
891 case V4L2_SEL_TGT_CROP_DEFAULT:
892 sel->r.left = 0;
893 sel->r.top = 0;
894 sel->r.width = VGA_WIDTH;
895 sel->r.height = VGA_HEIGHT;
896 return 0;
897 case V4L2_SEL_TGT_CROP:
898 sel->r = priv->frame;
899 return 0;
900 default:
901 return -EINVAL;
902 }
903 }
904
905 static int mt9t112_set_selection(struct v4l2_subdev *sd,
906 struct v4l2_subdev_pad_config *cfg,
907 struct v4l2_subdev_selection *sel)
908 {
909 struct i2c_client *client = v4l2_get_subdevdata(sd);
910 struct mt9t112_priv *priv = to_mt9t112(client);
911 const struct v4l2_rect *rect = &sel->r;
912
913 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
914 sel->target != V4L2_SEL_TGT_CROP)
915 return -EINVAL;
916
917 return mt9t112_set_params(priv, rect, priv->format->code);
918 }
919
920 static int mt9t112_get_fmt(struct v4l2_subdev *sd,
921 struct v4l2_subdev_pad_config *cfg,
922 struct v4l2_subdev_format *format)
923 {
924 struct v4l2_mbus_framefmt *mf = &format->format;
925 struct i2c_client *client = v4l2_get_subdevdata(sd);
926 struct mt9t112_priv *priv = to_mt9t112(client);
927
928 if (format->pad)
929 return -EINVAL;
930
931 mf->width = priv->frame.width;
932 mf->height = priv->frame.height;
933 mf->colorspace = priv->format->colorspace;
934 mf->code = priv->format->code;
935 mf->field = V4L2_FIELD_NONE;
936
937 return 0;
938 }
939
940 static int mt9t112_s_fmt(struct v4l2_subdev *sd,
941 struct v4l2_mbus_framefmt *mf)
942 {
943 struct i2c_client *client = v4l2_get_subdevdata(sd);
944 struct mt9t112_priv *priv = to_mt9t112(client);
945 struct v4l2_rect rect = {
946 .width = mf->width,
947 .height = mf->height,
948 .left = priv->frame.left,
949 .top = priv->frame.top,
950 };
951 int ret;
952
953 ret = mt9t112_set_params(priv, &rect, mf->code);
954
955 if (!ret)
956 mf->colorspace = priv->format->colorspace;
957
958 return ret;
959 }
960
961 static int mt9t112_set_fmt(struct v4l2_subdev *sd,
962 struct v4l2_subdev_pad_config *cfg,
963 struct v4l2_subdev_format *format)
964 {
965 struct i2c_client *client = v4l2_get_subdevdata(sd);
966 struct v4l2_mbus_framefmt *mf = &format->format;
967 struct mt9t112_priv *priv = to_mt9t112(client);
968 int i;
969
970 if (format->pad)
971 return -EINVAL;
972
973 for (i = 0; i < priv->num_formats; i++)
974 if (mt9t112_cfmts[i].code == mf->code)
975 break;
976
977 if (i == priv->num_formats) {
978 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
979 mf->colorspace = V4L2_COLORSPACE_JPEG;
980 } else {
981 mf->colorspace = mt9t112_cfmts[i].colorspace;
982 }
983
984 v4l_bound_align_image(&mf->width, 0, MAX_WIDTH, 0,
985 &mf->height, 0, MAX_HEIGHT, 0, 0);
986
987 mf->field = V4L2_FIELD_NONE;
988
989 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
990 return mt9t112_s_fmt(sd, mf);
991 cfg->try_fmt = *mf;
992
993 return 0;
994 }
995
996 static int mt9t112_enum_mbus_code(struct v4l2_subdev *sd,
997 struct v4l2_subdev_pad_config *cfg,
998 struct v4l2_subdev_mbus_code_enum *code)
999 {
1000 struct i2c_client *client = v4l2_get_subdevdata(sd);
1001 struct mt9t112_priv *priv = to_mt9t112(client);
1002
1003 if (code->pad || code->index >= priv->num_formats)
1004 return -EINVAL;
1005
1006 code->code = mt9t112_cfmts[code->index].code;
1007
1008 return 0;
1009 }
1010
1011 static const struct v4l2_subdev_video_ops mt9t112_subdev_video_ops = {
1012 .s_stream = mt9t112_s_stream,
1013 };
1014
1015 static const struct v4l2_subdev_pad_ops mt9t112_subdev_pad_ops = {
1016 .enum_mbus_code = mt9t112_enum_mbus_code,
1017 .get_selection = mt9t112_get_selection,
1018 .set_selection = mt9t112_set_selection,
1019 .get_fmt = mt9t112_get_fmt,
1020 .set_fmt = mt9t112_set_fmt,
1021 };
1022
1023 /************************************************************************
1024 * i2c driver
1025 ***********************************************************************/
1026 static const struct v4l2_subdev_ops mt9t112_subdev_ops = {
1027 .core = &mt9t112_subdev_core_ops,
1028 .video = &mt9t112_subdev_video_ops,
1029 .pad = &mt9t112_subdev_pad_ops,
1030 };
1031
1032 static int mt9t112_camera_probe(struct i2c_client *client)
1033 {
1034 struct mt9t112_priv *priv = to_mt9t112(client);
1035 const char *devname;
1036 int chipid;
1037 int ret;
1038
1039 ret = mt9t112_s_power(&priv->subdev, 1);
1040 if (ret < 0)
1041 return ret;
1042
1043 /* Check and show chip ID. */
1044 mt9t112_reg_read(chipid, client, 0x0000);
1045
1046 switch (chipid) {
1047 case 0x2680:
1048 devname = "mt9t111";
1049 priv->num_formats = 1;
1050 break;
1051 case 0x2682:
1052 devname = "mt9t112";
1053 priv->num_formats = ARRAY_SIZE(mt9t112_cfmts);
1054 break;
1055 default:
1056 dev_err(&client->dev, "Product ID error %04x\n", chipid);
1057 ret = -ENODEV;
1058 goto done;
1059 }
1060
1061 dev_info(&client->dev, "%s chip ID %04x\n", devname, chipid);
1062
1063 done:
1064 mt9t112_s_power(&priv->subdev, 0);
1065
1066 return ret;
1067 }
1068
1069 static int mt9t112_probe(struct i2c_client *client,
1070 const struct i2c_device_id *did)
1071 {
1072 struct mt9t112_priv *priv;
1073 int ret;
1074
1075 if (!client->dev.platform_data) {
1076 dev_err(&client->dev, "mt9t112: missing platform data!\n");
1077 return -EINVAL;
1078 }
1079
1080 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
1081 if (!priv)
1082 return -ENOMEM;
1083
1084 priv->info = client->dev.platform_data;
1085 priv->init_done = false;
1086
1087 v4l2_i2c_subdev_init(&priv->subdev, client, &mt9t112_subdev_ops);
1088
1089 priv->clk = devm_clk_get(&client->dev, "extclk");
1090 if (PTR_ERR(priv->clk) == -ENOENT) {
1091 priv->clk = NULL;
1092 } else if (IS_ERR(priv->clk)) {
1093 dev_err(&client->dev, "Unable to get clock \"extclk\"\n");
1094 return PTR_ERR(priv->clk);
1095 }
1096
1097 priv->standby_gpio = devm_gpiod_get_optional(&client->dev, "standby",
1098 GPIOD_OUT_HIGH);
1099 if (IS_ERR(priv->standby_gpio)) {
1100 dev_err(&client->dev, "Unable to get gpio \"standby\"\n");
1101 return PTR_ERR(priv->standby_gpio);
1102 }
1103
1104 ret = mt9t112_camera_probe(client);
1105 if (ret)
1106 return ret;
1107
1108 return v4l2_async_register_subdev(&priv->subdev);
1109 }
1110
1111 static int mt9t112_remove(struct i2c_client *client)
1112 {
1113 struct mt9t112_priv *priv = to_mt9t112(client);
1114
1115 clk_disable_unprepare(priv->clk);
1116 v4l2_async_unregister_subdev(&priv->subdev);
1117
1118 return 0;
1119 }
1120
1121 static const struct i2c_device_id mt9t112_id[] = {
1122 { "mt9t112", 0 },
1123 { }
1124 };
1125 MODULE_DEVICE_TABLE(i2c, mt9t112_id);
1126
1127 static struct i2c_driver mt9t112_i2c_driver = {
1128 .driver = {
1129 .name = "mt9t112",
1130 },
1131 .probe = mt9t112_probe,
1132 .remove = mt9t112_remove,
1133 .id_table = mt9t112_id,
1134 };
1135
1136 module_i2c_driver(mt9t112_i2c_driver);
1137
1138 MODULE_DESCRIPTION("V4L2 driver for MT9T111/MT9T112 camera sensor");
1139 MODULE_AUTHOR("Kuninori Morimoto");
1140 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support