?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
hwmon: (adt7475) fan stall prevention
[linux/fpc-iii.git] / drivers / media / i2c / m5mols / m5mols_core.c
blob9ccb5ee55fa9c845a076ee23bf46220339021df5
1 /*
2 * Driver for M-5MOLS 8M Pixel camera sensor with ISP
3 *
4 * Copyright (C) 2011 Samsung Electronics Co., Ltd.
5 * Author: HeungJun Kim <riverful.kim@samsung.com>
6 *
7 * Copyright (C) 2009 Samsung Electronics Co., Ltd.
8 * Author: Dongsoo Nathaniel Kim <dongsoo45.kim@samsung.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 */
15
16 #include <linux/i2c.h>
17 #include <linux/slab.h>
18 #include <linux/irq.h>
19 #include <linux/interrupt.h>
20 #include <linux/delay.h>
21 #include <linux/gpio.h>
22 #include <linux/regulator/consumer.h>
23 #include <linux/videodev2.h>
24 #include <linux/module.h>
25 #include <media/v4l2-ctrls.h>
26 #include <media/v4l2-device.h>
27 #include <media/v4l2-subdev.h>
28 #include <media/i2c/m5mols.h>
29
30 #include "m5mols.h"
31 #include "m5mols_reg.h"
32
33 int m5mols_debug;
34 module_param(m5mols_debug, int, 0644);
35
36 #define MODULE_NAME "M5MOLS"
37 #define M5MOLS_I2C_CHECK_RETRY 500
38
39 /* The regulator consumer names for external voltage regulators */
40 static struct regulator_bulk_data supplies[] = {
41 {
42 .supply = "core", /* ARM core power, 1.2V */
43 }, {
44 .supply = "dig_18", /* digital power 1, 1.8V */
45 }, {
46 .supply = "d_sensor", /* sensor power 1, 1.8V */
47 }, {
48 .supply = "dig_28", /* digital power 2, 2.8V */
49 }, {
50 .supply = "a_sensor", /* analog power */
51 }, {
52 .supply = "dig_12", /* digital power 3, 1.2V */
53 },
54 };
55
56 static struct v4l2_mbus_framefmt m5mols_default_ffmt[M5MOLS_RESTYPE_MAX] = {
57 [M5MOLS_RESTYPE_MONITOR] = {
58 .width = 1920,
59 .height = 1080,
60 .code = MEDIA_BUS_FMT_VYUY8_2X8,
61 .field = V4L2_FIELD_NONE,
62 .colorspace = V4L2_COLORSPACE_JPEG,
63 },
64 [M5MOLS_RESTYPE_CAPTURE] = {
65 .width = 1920,
66 .height = 1080,
67 .code = MEDIA_BUS_FMT_JPEG_1X8,
68 .field = V4L2_FIELD_NONE,
69 .colorspace = V4L2_COLORSPACE_JPEG,
70 },
71 };
72 #define SIZE_DEFAULT_FFMT ARRAY_SIZE(m5mols_default_ffmt)
73
74 static const struct m5mols_resolution m5mols_reg_res[] = {
75 { 0x01, M5MOLS_RESTYPE_MONITOR, 128, 96 }, /* SUB-QCIF */
76 { 0x03, M5MOLS_RESTYPE_MONITOR, 160, 120 }, /* QQVGA */
77 { 0x05, M5MOLS_RESTYPE_MONITOR, 176, 144 }, /* QCIF */
78 { 0x06, M5MOLS_RESTYPE_MONITOR, 176, 176 },
79 { 0x08, M5MOLS_RESTYPE_MONITOR, 240, 320 }, /* QVGA */
80 { 0x09, M5MOLS_RESTYPE_MONITOR, 320, 240 }, /* QVGA */
81 { 0x0c, M5MOLS_RESTYPE_MONITOR, 240, 400 }, /* WQVGA */
82 { 0x0d, M5MOLS_RESTYPE_MONITOR, 400, 240 }, /* WQVGA */
83 { 0x0e, M5MOLS_RESTYPE_MONITOR, 352, 288 }, /* CIF */
84 { 0x13, M5MOLS_RESTYPE_MONITOR, 480, 360 },
85 { 0x15, M5MOLS_RESTYPE_MONITOR, 640, 360 }, /* qHD */
86 { 0x17, M5MOLS_RESTYPE_MONITOR, 640, 480 }, /* VGA */
87 { 0x18, M5MOLS_RESTYPE_MONITOR, 720, 480 },
88 { 0x1a, M5MOLS_RESTYPE_MONITOR, 800, 480 }, /* WVGA */
89 { 0x1f, M5MOLS_RESTYPE_MONITOR, 800, 600 }, /* SVGA */
90 { 0x21, M5MOLS_RESTYPE_MONITOR, 1280, 720 }, /* HD */
91 { 0x25, M5MOLS_RESTYPE_MONITOR, 1920, 1080 }, /* 1080p */
92 { 0x29, M5MOLS_RESTYPE_MONITOR, 3264, 2448 }, /* 2.63fps 8M */
93 { 0x39, M5MOLS_RESTYPE_MONITOR, 800, 602 }, /* AHS_MON debug */
94
95 { 0x02, M5MOLS_RESTYPE_CAPTURE, 320, 240 }, /* QVGA */
96 { 0x04, M5MOLS_RESTYPE_CAPTURE, 400, 240 }, /* WQVGA */
97 { 0x07, M5MOLS_RESTYPE_CAPTURE, 480, 360 },
98 { 0x08, M5MOLS_RESTYPE_CAPTURE, 640, 360 }, /* qHD */
99 { 0x09, M5MOLS_RESTYPE_CAPTURE, 640, 480 }, /* VGA */
100 { 0x0a, M5MOLS_RESTYPE_CAPTURE, 800, 480 }, /* WVGA */
101 { 0x10, M5MOLS_RESTYPE_CAPTURE, 1280, 720 }, /* HD */
102 { 0x14, M5MOLS_RESTYPE_CAPTURE, 1280, 960 }, /* 1M */
103 { 0x17, M5MOLS_RESTYPE_CAPTURE, 1600, 1200 }, /* 2M */
104 { 0x19, M5MOLS_RESTYPE_CAPTURE, 1920, 1080 }, /* Full-HD */
105 { 0x1a, M5MOLS_RESTYPE_CAPTURE, 2048, 1152 }, /* 3Mega */
106 { 0x1b, M5MOLS_RESTYPE_CAPTURE, 2048, 1536 },
107 { 0x1c, M5MOLS_RESTYPE_CAPTURE, 2560, 1440 }, /* 4Mega */
108 { 0x1d, M5MOLS_RESTYPE_CAPTURE, 2560, 1536 },
109 { 0x1f, M5MOLS_RESTYPE_CAPTURE, 2560, 1920 }, /* 5Mega */
110 { 0x21, M5MOLS_RESTYPE_CAPTURE, 3264, 1836 }, /* 6Mega */
111 { 0x22, M5MOLS_RESTYPE_CAPTURE, 3264, 1960 },
112 { 0x25, M5MOLS_RESTYPE_CAPTURE, 3264, 2448 }, /* 8Mega */
113 };
114
115 /**
116 * m5mols_swap_byte - an byte array to integer conversion function
117 * @size: size in bytes of I2C packet defined in the M-5MOLS datasheet
118 *
119 * Convert I2C data byte array with performing any required byte
120 * reordering to assure proper values for each data type, regardless
121 * of the architecture endianness.
122 */
123 static u32 m5mols_swap_byte(u8 *data, u8 length)
124 {
125 if (length == 1)
126 return *data;
127 else if (length == 2)
128 return be16_to_cpu(*((__be16 *)data));
129 else
130 return be32_to_cpu(*((__be32 *)data));
131 }
132
133 /**
134 * m5mols_read - I2C read function
135 * @reg: combination of size, category and command for the I2C packet
136 * @size: desired size of I2C packet
137 * @val: read value
138 *
139 * Returns 0 on success, or else negative errno.
140 */
141 static int m5mols_read(struct v4l2_subdev *sd, u32 size, u32 reg, u32 *val)
142 {
143 struct i2c_client *client = v4l2_get_subdevdata(sd);
144 struct m5mols_info *info = to_m5mols(sd);
145 u8 rbuf[M5MOLS_I2C_MAX_SIZE + 1];
146 u8 category = I2C_CATEGORY(reg);
147 u8 cmd = I2C_COMMAND(reg);
148 struct i2c_msg msg[2];
149 u8 wbuf[5];
150 int ret;
151
152 if (!client->adapter)
153 return -ENODEV;
154
155 msg[0].addr = client->addr;
156 msg[0].flags = 0;
157 msg[0].len = 5;
158 msg[0].buf = wbuf;
159 wbuf[0] = 5;
160 wbuf[1] = M5MOLS_BYTE_READ;
161 wbuf[2] = category;
162 wbuf[3] = cmd;
163 wbuf[4] = size;
164
165 msg[1].addr = client->addr;
166 msg[1].flags = I2C_M_RD;
167 msg[1].len = size + 1;
168 msg[1].buf = rbuf;
169
170 /* minimum stabilization time */
171 usleep_range(200, 300);
172
173 ret = i2c_transfer(client->adapter, msg, 2);
174
175 if (ret == 2) {
176 *val = m5mols_swap_byte(&rbuf[1], size);
177 return 0;
178 }
179
180 if (info->isp_ready)
181 v4l2_err(sd, "read failed: size:%d cat:%02x cmd:%02x. %d\n",
182 size, category, cmd, ret);
183
184 return ret < 0 ? ret : -EIO;
185 }
186
187 int m5mols_read_u8(struct v4l2_subdev *sd, u32 reg, u8 *val)
188 {
189 u32 val_32;
190 int ret;
191
192 if (I2C_SIZE(reg) != 1) {
193 v4l2_err(sd, "Wrong data size\n");
194 return -EINVAL;
195 }
196
197 ret = m5mols_read(sd, I2C_SIZE(reg), reg, &val_32);
198 if (ret)
199 return ret;
200
201 *val = (u8)val_32;
202 return ret;
203 }
204
205 int m5mols_read_u16(struct v4l2_subdev *sd, u32 reg, u16 *val)
206 {
207 u32 val_32;
208 int ret;
209
210 if (I2C_SIZE(reg) != 2) {
211 v4l2_err(sd, "Wrong data size\n");
212 return -EINVAL;
213 }
214
215 ret = m5mols_read(sd, I2C_SIZE(reg), reg, &val_32);
216 if (ret)
217 return ret;
218
219 *val = (u16)val_32;
220 return ret;
221 }
222
223 int m5mols_read_u32(struct v4l2_subdev *sd, u32 reg, u32 *val)
224 {
225 if (I2C_SIZE(reg) != 4) {
226 v4l2_err(sd, "Wrong data size\n");
227 return -EINVAL;
228 }
229
230 return m5mols_read(sd, I2C_SIZE(reg), reg, val);
231 }
232
233 /**
234 * m5mols_write - I2C command write function
235 * @reg: combination of size, category and command for the I2C packet
236 * @val: value to write
237 *
238 * Returns 0 on success, or else negative errno.
239 */
240 int m5mols_write(struct v4l2_subdev *sd, u32 reg, u32 val)
241 {
242 struct i2c_client *client = v4l2_get_subdevdata(sd);
243 struct m5mols_info *info = to_m5mols(sd);
244 u8 wbuf[M5MOLS_I2C_MAX_SIZE + 4];
245 u8 category = I2C_CATEGORY(reg);
246 u8 cmd = I2C_COMMAND(reg);
247 u8 size = I2C_SIZE(reg);
248 u32 *buf = (u32 *)&wbuf[4];
249 struct i2c_msg msg[1];
250 int ret;
251
252 if (!client->adapter)
253 return -ENODEV;
254
255 if (size != 1 && size != 2 && size != 4) {
256 v4l2_err(sd, "Wrong data size\n");
257 return -EINVAL;
258 }
259
260 msg->addr = client->addr;
261 msg->flags = 0;
262 msg->len = (u16)size + 4;
263 msg->buf = wbuf;
264 wbuf[0] = size + 4;
265 wbuf[1] = M5MOLS_BYTE_WRITE;
266 wbuf[2] = category;
267 wbuf[3] = cmd;
268
269 *buf = m5mols_swap_byte((u8 *)&val, size);
270
271 /* minimum stabilization time */
272 usleep_range(200, 300);
273
274 ret = i2c_transfer(client->adapter, msg, 1);
275 if (ret == 1)
276 return 0;
277
278 if (info->isp_ready)
279 v4l2_err(sd, "write failed: cat:%02x cmd:%02x ret:%d\n",
280 category, cmd, ret);
281
282 return ret < 0 ? ret : -EIO;
283 }
284
285 /**
286 * m5mols_busy_wait - Busy waiting with I2C register polling
287 * @reg: the I2C_REG() address of an 8-bit status register to check
288 * @value: expected status register value
289 * @mask: bit mask for the read status register value
290 * @timeout: timeout in miliseconds, or -1 for default timeout
291 *
292 * The @reg register value is ORed with @mask before comparing with @value.
293 *
294 * Return: 0 if the requested condition became true within less than
295 * @timeout ms, or else negative errno.
296 */
297 int m5mols_busy_wait(struct v4l2_subdev *sd, u32 reg, u32 value, u32 mask,
298 int timeout)
299 {
300 int ms = timeout < 0 ? M5MOLS_BUSY_WAIT_DEF_TIMEOUT : timeout;
301 unsigned long end = jiffies + msecs_to_jiffies(ms);
302 u8 status;
303
304 do {
305 int ret = m5mols_read_u8(sd, reg, &status);
306
307 if (ret < 0 && !(mask & M5MOLS_I2C_RDY_WAIT_FL))
308 return ret;
309 if (!ret && (status & mask & 0xff) == (value & 0xff))
310 return 0;
311 usleep_range(100, 250);
312 } while (ms > 0 && time_is_after_jiffies(end));
313
314 return -EBUSY;
315 }
316
317 /**
318 * m5mols_enable_interrupt - Clear interrupt pending bits and unmask interrupts
319 *
320 * Before writing desired interrupt value the INT_FACTOR register should
321 * be read to clear pending interrupts.
322 */
323 int m5mols_enable_interrupt(struct v4l2_subdev *sd, u8 reg)
324 {
325 struct m5mols_info *info = to_m5mols(sd);
326 u8 mask = is_available_af(info) ? REG_INT_AF : 0;
327 u8 dummy;
328 int ret;
329
330 ret = m5mols_read_u8(sd, SYSTEM_INT_FACTOR, &dummy);
331 if (!ret)
332 ret = m5mols_write(sd, SYSTEM_INT_ENABLE, reg & ~mask);
333 return ret;
334 }
335
336 int m5mols_wait_interrupt(struct v4l2_subdev *sd, u8 irq_mask, u32 timeout)
337 {
338 struct m5mols_info *info = to_m5mols(sd);
339
340 int ret = wait_event_interruptible_timeout(info->irq_waitq,
341 atomic_add_unless(&info->irq_done, -1, 0),
342 msecs_to_jiffies(timeout));
343 if (ret <= 0)
344 return ret ? ret : -ETIMEDOUT;
345
346 return m5mols_busy_wait(sd, SYSTEM_INT_FACTOR, irq_mask,
347 M5MOLS_I2C_RDY_WAIT_FL | irq_mask, -1);
348 }
349
350 /**
351 * m5mols_reg_mode - Write the mode and check busy status
352 *
353 * It always accompanies a little delay changing the M-5MOLS mode, so it is
354 * needed checking current busy status to guarantee right mode.
355 */
356 static int m5mols_reg_mode(struct v4l2_subdev *sd, u8 mode)
357 {
358 int ret = m5mols_write(sd, SYSTEM_SYSMODE, mode);
359 if (ret < 0)
360 return ret;
361 return m5mols_busy_wait(sd, SYSTEM_SYSMODE, mode, 0xff,
362 M5MOLS_MODE_CHANGE_TIMEOUT);
363 }
364
365 /**
366 * m5mols_set_mode - set the M-5MOLS controller mode
367 * @mode: the required operation mode
368 *
369 * The commands of M-5MOLS are grouped into specific modes. Each functionality
370 * can be guaranteed only when the sensor is operating in mode which a command
371 * belongs to.
372 */
373 int m5mols_set_mode(struct m5mols_info *info, u8 mode)
374 {
375 struct v4l2_subdev *sd = &info->sd;
376 int ret = -EINVAL;
377 u8 reg;
378
379 if (mode < REG_PARAMETER || mode > REG_CAPTURE)
380 return ret;
381
382 ret = m5mols_read_u8(sd, SYSTEM_SYSMODE, &reg);
383 if (ret || reg == mode)
384 return ret;
385
386 switch (reg) {
387 case REG_PARAMETER:
388 ret = m5mols_reg_mode(sd, REG_MONITOR);
389 if (mode == REG_MONITOR)
390 break;
391 if (!ret)
392 ret = m5mols_reg_mode(sd, REG_CAPTURE);
393 break;
394
395 case REG_MONITOR:
396 if (mode == REG_PARAMETER) {
397 ret = m5mols_reg_mode(sd, REG_PARAMETER);
398 break;
399 }
400
401 ret = m5mols_reg_mode(sd, REG_CAPTURE);
402 break;
403
404 case REG_CAPTURE:
405 ret = m5mols_reg_mode(sd, REG_MONITOR);
406 if (mode == REG_MONITOR)
407 break;
408 if (!ret)
409 ret = m5mols_reg_mode(sd, REG_PARAMETER);
410 break;
411
412 default:
413 v4l2_warn(sd, "Wrong mode: %d\n", mode);
414 }
415
416 if (!ret)
417 info->mode = mode;
418
419 return ret;
420 }
421
422 /**
423 * m5mols_get_version - retrieve full revisions information of M-5MOLS
424 *
425 * The version information includes revisions of hardware and firmware,
426 * AutoFocus alghorithm version and the version string.
427 */
428 static int m5mols_get_version(struct v4l2_subdev *sd)
429 {
430 struct m5mols_info *info = to_m5mols(sd);
431 struct m5mols_version *ver = &info->ver;
432 u8 *str = ver->str;
433 int i;
434 int ret;
435
436 ret = m5mols_read_u8(sd, SYSTEM_VER_CUSTOMER, &ver->customer);
437 if (!ret)
438 ret = m5mols_read_u8(sd, SYSTEM_VER_PROJECT, &ver->project);
439 if (!ret)
440 ret = m5mols_read_u16(sd, SYSTEM_VER_FIRMWARE, &ver->fw);
441 if (!ret)
442 ret = m5mols_read_u16(sd, SYSTEM_VER_HARDWARE, &ver->hw);
443 if (!ret)
444 ret = m5mols_read_u16(sd, SYSTEM_VER_PARAMETER, &ver->param);
445 if (!ret)
446 ret = m5mols_read_u16(sd, SYSTEM_VER_AWB, &ver->awb);
447 if (!ret)
448 ret = m5mols_read_u8(sd, AF_VERSION, &ver->af);
449 if (ret)
450 return ret;
451
452 for (i = 0; i < VERSION_STRING_SIZE; i++) {
453 ret = m5mols_read_u8(sd, SYSTEM_VER_STRING, &str[i]);
454 if (ret)
455 return ret;
456 }
457
458 v4l2_info(sd, "Manufacturer\t[%s]\n",
459 is_manufacturer(info, REG_SAMSUNG_ELECTRO) ?
460 "Samsung Electro-Machanics" :
461 is_manufacturer(info, REG_SAMSUNG_OPTICS) ?
462 "Samsung Fiber-Optics" :
463 is_manufacturer(info, REG_SAMSUNG_TECHWIN) ?
464 "Samsung Techwin" : "None");
465 v4l2_info(sd, "Customer/Project\t[0x%02x/0x%02x]\n",
466 info->ver.customer, info->ver.project);
467
468 if (!is_available_af(info))
469 v4l2_info(sd, "No support Auto Focus on this firmware\n");
470
471 return ret;
472 }
473
474 /**
475 * __find_restype - Lookup M-5MOLS resolution type according to pixel code
476 * @code: pixel code
477 */
478 static enum m5mols_restype __find_restype(u32 code)
479 {
480 enum m5mols_restype type = M5MOLS_RESTYPE_MONITOR;
481
482 do {
483 if (code == m5mols_default_ffmt[type].code)
484 return type;
485 } while (type++ != SIZE_DEFAULT_FFMT);
486
487 return 0;
488 }
489
490 /**
491 * __find_resolution - Lookup preset and type of M-5MOLS's resolution
492 * @mf: pixel format to find/negotiate the resolution preset for
493 * @type: M-5MOLS resolution type
494 * @resolution: M-5MOLS resolution preset register value
495 *
496 * Find nearest resolution matching resolution preset and adjust mf
497 * to supported values.
498 */
499 static int __find_resolution(struct v4l2_subdev *sd,
500 struct v4l2_mbus_framefmt *mf,
501 enum m5mols_restype *type,
502 u32 *resolution)
503 {
504 const struct m5mols_resolution *fsize = &m5mols_reg_res[0];
505 const struct m5mols_resolution *match = NULL;
506 enum m5mols_restype stype = __find_restype(mf->code);
507 int i = ARRAY_SIZE(m5mols_reg_res);
508 unsigned int min_err = ~0;
509
510 while (i--) {
511 int err;
512 if (stype == fsize->type) {
513 err = abs(fsize->width - mf->width)
514 + abs(fsize->height - mf->height);
515
516 if (err < min_err) {
517 min_err = err;
518 match = fsize;
519 }
520 }
521 fsize++;
522 }
523 if (match) {
524 mf->width = match->width;
525 mf->height = match->height;
526 *resolution = match->reg;
527 *type = stype;
528 return 0;
529 }
530
531 return -EINVAL;
532 }
533
534 static struct v4l2_mbus_framefmt *__find_format(struct m5mols_info *info,
535 struct v4l2_subdev_pad_config *cfg,
536 enum v4l2_subdev_format_whence which,
537 enum m5mols_restype type)
538 {
539 if (which == V4L2_SUBDEV_FORMAT_TRY)
540 return cfg ? v4l2_subdev_get_try_format(&info->sd, cfg, 0) : NULL;
541
542 return &info->ffmt[type];
543 }
544
545 static int m5mols_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
546 struct v4l2_subdev_format *fmt)
547 {
548 struct m5mols_info *info = to_m5mols(sd);
549 struct v4l2_mbus_framefmt *format;
550 int ret = 0;
551
552 mutex_lock(&info->lock);
553
554 format = __find_format(info, cfg, fmt->which, info->res_type);
555 if (format)
556 fmt->format = *format;
557 else
558 ret = -EINVAL;
559
560 mutex_unlock(&info->lock);
561 return ret;
562 }
563
564 static int m5mols_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
565 struct v4l2_subdev_format *fmt)
566 {
567 struct m5mols_info *info = to_m5mols(sd);
568 struct v4l2_mbus_framefmt *format = &fmt->format;
569 struct v4l2_mbus_framefmt *sfmt;
570 enum m5mols_restype type;
571 u32 resolution = 0;
572 int ret;
573
574 ret = __find_resolution(sd, format, &type, &resolution);
575 if (ret < 0)
576 return ret;
577
578 sfmt = __find_format(info, cfg, fmt->which, type);
579 if (!sfmt)
580 return 0;
581
582 mutex_lock(&info->lock);
583
584 format->code = m5mols_default_ffmt[type].code;
585 format->colorspace = V4L2_COLORSPACE_JPEG;
586 format->field = V4L2_FIELD_NONE;
587
588 if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
589 *sfmt = *format;
590 info->resolution = resolution;
591 info->res_type = type;
592 }
593
594 mutex_unlock(&info->lock);
595 return ret;
596 }
597
598 static int m5mols_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
599 struct v4l2_mbus_frame_desc *fd)
600 {
601 struct m5mols_info *info = to_m5mols(sd);
602
603 if (pad != 0 || fd == NULL)
604 return -EINVAL;
605
606 mutex_lock(&info->lock);
607 /*
608 * .get_frame_desc is only used for compressed formats,
609 * thus we always return the capture frame parameters here.
610 */
611 fd->entry[0].length = info->cap.buf_size;
612 fd->entry[0].pixelcode = info->ffmt[M5MOLS_RESTYPE_CAPTURE].code;
613 mutex_unlock(&info->lock);
614
615 fd->entry[0].flags = V4L2_MBUS_FRAME_DESC_FL_LEN_MAX;
616 fd->num_entries = 1;
617
618 return 0;
619 }
620
621 static int m5mols_set_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
622 struct v4l2_mbus_frame_desc *fd)
623 {
624 struct m5mols_info *info = to_m5mols(sd);
625 struct v4l2_mbus_framefmt *mf = &info->ffmt[M5MOLS_RESTYPE_CAPTURE];
626
627 if (pad != 0 || fd == NULL)
628 return -EINVAL;
629
630 fd->entry[0].flags = V4L2_MBUS_FRAME_DESC_FL_LEN_MAX;
631 fd->num_entries = 1;
632 fd->entry[0].length = clamp_t(u32, fd->entry[0].length,
633 mf->width * mf->height,
634 M5MOLS_MAIN_JPEG_SIZE_MAX);
635 mutex_lock(&info->lock);
636 info->cap.buf_size = fd->entry[0].length;
637 mutex_unlock(&info->lock);
638
639 return 0;
640 }
641
642
643 static int m5mols_enum_mbus_code(struct v4l2_subdev *sd,
644 struct v4l2_subdev_pad_config *cfg,
645 struct v4l2_subdev_mbus_code_enum *code)
646 {
647 if (!code || code->index >= SIZE_DEFAULT_FFMT)
648 return -EINVAL;
649
650 code->code = m5mols_default_ffmt[code->index].code;
651
652 return 0;
653 }
654
655 static const struct v4l2_subdev_pad_ops m5mols_pad_ops = {
656 .enum_mbus_code = m5mols_enum_mbus_code,
657 .get_fmt = m5mols_get_fmt,
658 .set_fmt = m5mols_set_fmt,
659 .get_frame_desc = m5mols_get_frame_desc,
660 .set_frame_desc = m5mols_set_frame_desc,
661 };
662
663 /**
664 * m5mols_restore_controls - Apply current control values to the registers
665 *
666 * m5mols_do_scenemode() handles all parameters for which there is yet no
667 * individual control. It should be replaced at some point by setting each
668 * control individually, in required register set up order.
669 */
670 int m5mols_restore_controls(struct m5mols_info *info)
671 {
672 int ret;
673
674 if (info->ctrl_sync)
675 return 0;
676
677 ret = m5mols_do_scenemode(info, REG_SCENE_NORMAL);
678 if (ret)
679 return ret;
680
681 ret = v4l2_ctrl_handler_setup(&info->handle);
682 info->ctrl_sync = !ret;
683
684 return ret;
685 }
686
687 /**
688 * m5mols_start_monitor - Start the monitor mode
689 *
690 * Before applying the controls setup the resolution and frame rate
691 * in PARAMETER mode, and then switch over to MONITOR mode.
692 */
693 static int m5mols_start_monitor(struct m5mols_info *info)
694 {
695 struct v4l2_subdev *sd = &info->sd;
696 int ret;
697
698 ret = m5mols_set_mode(info, REG_PARAMETER);
699 if (!ret)
700 ret = m5mols_write(sd, PARM_MON_SIZE, info->resolution);
701 if (!ret)
702 ret = m5mols_write(sd, PARM_MON_FPS, REG_FPS_30);
703 if (!ret)
704 ret = m5mols_set_mode(info, REG_MONITOR);
705 if (!ret)
706 ret = m5mols_restore_controls(info);
707
708 return ret;
709 }
710
711 static int m5mols_s_stream(struct v4l2_subdev *sd, int enable)
712 {
713 struct m5mols_info *info = to_m5mols(sd);
714 u32 code;
715 int ret;
716
717 mutex_lock(&info->lock);
718 code = info->ffmt[info->res_type].code;
719
720 if (enable) {
721 if (is_code(code, M5MOLS_RESTYPE_MONITOR))
722 ret = m5mols_start_monitor(info);
723 else if (is_code(code, M5MOLS_RESTYPE_CAPTURE))
724 ret = m5mols_start_capture(info);
725 else
726 ret = -EINVAL;
727 } else {
728 ret = m5mols_set_mode(info, REG_PARAMETER);
729 }
730
731 mutex_unlock(&info->lock);
732 return ret;
733 }
734
735 static const struct v4l2_subdev_video_ops m5mols_video_ops = {
736 .s_stream = m5mols_s_stream,
737 };
738
739 static int m5mols_sensor_power(struct m5mols_info *info, bool enable)
740 {
741 struct v4l2_subdev *sd = &info->sd;
742 struct i2c_client *client = v4l2_get_subdevdata(sd);
743 const struct m5mols_platform_data *pdata = info->pdata;
744 int ret;
745
746 if (info->power == enable)
747 return 0;
748
749 if (enable) {
750 if (info->set_power) {
751 ret = info->set_power(&client->dev, 1);
752 if (ret)
753 return ret;
754 }
755
756 ret = regulator_bulk_enable(ARRAY_SIZE(supplies), supplies);
757 if (ret) {
758 info->set_power(&client->dev, 0);
759 return ret;
760 }
761
762 gpio_set_value(pdata->gpio_reset, !pdata->reset_polarity);
763 info->power = 1;
764
765 return ret;
766 }
767
768 ret = regulator_bulk_disable(ARRAY_SIZE(supplies), supplies);
769 if (ret)
770 return ret;
771
772 if (info->set_power)
773 info->set_power(&client->dev, 0);
774
775 gpio_set_value(pdata->gpio_reset, pdata->reset_polarity);
776
777 info->isp_ready = 0;
778 info->power = 0;
779
780 return ret;
781 }
782
783 /* m5mols_update_fw - optional firmware update routine */
784 int __attribute__ ((weak)) m5mols_update_fw(struct v4l2_subdev *sd,
785 int (*set_power)(struct m5mols_info *, bool))
786 {
787 return 0;
788 }
789
790 /**
791 * m5mols_fw_start - M-5MOLS internal ARM controller initialization
792 *
793 * Execute the M-5MOLS internal ARM controller initialization sequence.
794 * This function should be called after the supply voltage has been
795 * applied and before any requests to the device are made.
796 */
797 static int m5mols_fw_start(struct v4l2_subdev *sd)
798 {
799 struct m5mols_info *info = to_m5mols(sd);
800 int ret;
801
802 atomic_set(&info->irq_done, 0);
803 /* Wait until I2C slave is initialized in Flash Writer mode */
804 ret = m5mols_busy_wait(sd, FLASH_CAM_START, REG_IN_FLASH_MODE,
805 M5MOLS_I2C_RDY_WAIT_FL | 0xff, -1);
806 if (!ret)
807 ret = m5mols_write(sd, FLASH_CAM_START, REG_START_ARM_BOOT);
808 if (!ret)
809 ret = m5mols_wait_interrupt(sd, REG_INT_MODE, 2000);
810 if (ret < 0)
811 return ret;
812
813 info->isp_ready = 1;
814
815 ret = m5mols_get_version(sd);
816 if (!ret)
817 ret = m5mols_update_fw(sd, m5mols_sensor_power);
818 if (ret)
819 return ret;
820
821 v4l2_dbg(1, m5mols_debug, sd, "Success ARM Booting\n");
822
823 ret = m5mols_write(sd, PARM_INTERFACE, REG_INTERFACE_MIPI);
824 if (!ret)
825 ret = m5mols_enable_interrupt(sd,
826 REG_INT_AF | REG_INT_CAPTURE);
827
828 return ret;
829 }
830
831 /* Execute the lens soft-landing algorithm */
832 static int m5mols_auto_focus_stop(struct m5mols_info *info)
833 {
834 int ret;
835
836 ret = m5mols_write(&info->sd, AF_EXECUTE, REG_AF_STOP);
837 if (!ret)
838 ret = m5mols_write(&info->sd, AF_MODE, REG_AF_POWEROFF);
839 if (!ret)
840 ret = m5mols_busy_wait(&info->sd, SYSTEM_STATUS, REG_AF_IDLE,
841 0xff, -1);
842 return ret;
843 }
844
845 /**
846 * m5mols_s_power - Main sensor power control function
847 *
848 * To prevent breaking the lens when the sensor is powered off the Soft-Landing
849 * algorithm is called where available. The Soft-Landing algorithm availability
850 * dependends on the firmware provider.
851 */
852 static int m5mols_s_power(struct v4l2_subdev *sd, int on)
853 {
854 struct m5mols_info *info = to_m5mols(sd);
855 int ret;
856
857 mutex_lock(&info->lock);
858
859 if (on) {
860 ret = m5mols_sensor_power(info, true);
861 if (!ret)
862 ret = m5mols_fw_start(sd);
863 } else {
864 if (is_manufacturer(info, REG_SAMSUNG_TECHWIN)) {
865 ret = m5mols_set_mode(info, REG_MONITOR);
866 if (!ret)
867 ret = m5mols_auto_focus_stop(info);
868 if (ret < 0)
869 v4l2_warn(sd, "Soft landing lens failed\n");
870 }
871 ret = m5mols_sensor_power(info, false);
872
873 info->ctrl_sync = 0;
874 }
875
876 mutex_unlock(&info->lock);
877 return ret;
878 }
879
880 static int m5mols_log_status(struct v4l2_subdev *sd)
881 {
882 struct m5mols_info *info = to_m5mols(sd);
883
884 v4l2_ctrl_handler_log_status(&info->handle, sd->name);
885
886 return 0;
887 }
888
889 static const struct v4l2_subdev_core_ops m5mols_core_ops = {
890 .s_power = m5mols_s_power,
891 .log_status = m5mols_log_status,
892 };
893
894 /*
895 * V4L2 subdev internal operations
896 */
897 static int m5mols_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
898 {
899 struct v4l2_mbus_framefmt *format = v4l2_subdev_get_try_format(sd, fh->pad, 0);
900
901 *format = m5mols_default_ffmt[0];
902 return 0;
903 }
904
905 static const struct v4l2_subdev_internal_ops m5mols_subdev_internal_ops = {
906 .open = m5mols_open,
907 };
908
909 static const struct v4l2_subdev_ops m5mols_ops = {
910 .core = &m5mols_core_ops,
911 .pad = &m5mols_pad_ops,
912 .video = &m5mols_video_ops,
913 };
914
915 static irqreturn_t m5mols_irq_handler(int irq, void *data)
916 {
917 struct m5mols_info *info = to_m5mols(data);
918
919 atomic_set(&info->irq_done, 1);
920 wake_up_interruptible(&info->irq_waitq);
921
922 return IRQ_HANDLED;
923 }
924
925 static int m5mols_probe(struct i2c_client *client,
926 const struct i2c_device_id *id)
927 {
928 const struct m5mols_platform_data *pdata = client->dev.platform_data;
929 unsigned long gpio_flags;
930 struct m5mols_info *info;
931 struct v4l2_subdev *sd;
932 int ret;
933
934 if (pdata == NULL) {
935 dev_err(&client->dev, "No platform data\n");
936 return -EINVAL;
937 }
938
939 if (!gpio_is_valid(pdata->gpio_reset)) {
940 dev_err(&client->dev, "No valid RESET GPIO specified\n");
941 return -EINVAL;
942 }
943
944 if (!client->irq) {
945 dev_err(&client->dev, "Interrupt not assigned\n");
946 return -EINVAL;
947 }
948
949 info = devm_kzalloc(&client->dev, sizeof(*info), GFP_KERNEL);
950 if (!info)
951 return -ENOMEM;
952
953 info->pdata = pdata;
954 info->set_power = pdata->set_power;
955
956 gpio_flags = pdata->reset_polarity
957 ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW;
958 ret = devm_gpio_request_one(&client->dev, pdata->gpio_reset, gpio_flags,
959 "M5MOLS_NRST");
960 if (ret) {
961 dev_err(&client->dev, "Failed to request gpio: %d\n", ret);
962 return ret;
963 }
964
965 ret = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(supplies),
966 supplies);
967 if (ret) {
968 dev_err(&client->dev, "Failed to get regulators: %d\n", ret);
969 return ret;
970 }
971
972 sd = &info->sd;
973 v4l2_i2c_subdev_init(sd, client, &m5mols_ops);
974 strlcpy(sd->name, MODULE_NAME, sizeof(sd->name));
975 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
976
977 sd->internal_ops = &m5mols_subdev_internal_ops;
978 info->pad.flags = MEDIA_PAD_FL_SOURCE;
979 ret = media_entity_pads_init(&sd->entity, 1, &info->pad);
980 if (ret < 0)
981 return ret;
982 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
983
984 init_waitqueue_head(&info->irq_waitq);
985 mutex_init(&info->lock);
986
987 ret = devm_request_irq(&client->dev, client->irq, m5mols_irq_handler,
988 IRQF_TRIGGER_RISING, MODULE_NAME, sd);
989 if (ret) {
990 dev_err(&client->dev, "Interrupt request failed: %d\n", ret);
991 goto error;
992 }
993 info->res_type = M5MOLS_RESTYPE_MONITOR;
994 info->ffmt[0] = m5mols_default_ffmt[0];
995 info->ffmt[1] = m5mols_default_ffmt[1];
996
997 ret = m5mols_sensor_power(info, true);
998 if (ret)
999 goto error;
1000
1001 ret = m5mols_fw_start(sd);
1002 if (!ret)
1003 ret = m5mols_init_controls(sd);
1004
1005 ret = m5mols_sensor_power(info, false);
1006 if (!ret)
1007 return 0;
1008 error:
1009 media_entity_cleanup(&sd->entity);
1010 return ret;
1011 }
1012
1013 static int m5mols_remove(struct i2c_client *client)
1014 {
1015 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1016
1017 v4l2_device_unregister_subdev(sd);
1018 v4l2_ctrl_handler_free(sd->ctrl_handler);
1019 media_entity_cleanup(&sd->entity);
1020
1021 return 0;
1022 }
1023
1024 static const struct i2c_device_id m5mols_id[] = {
1025 { MODULE_NAME, 0 },
1026 { },
1027 };
1028 MODULE_DEVICE_TABLE(i2c, m5mols_id);
1029
1030 static struct i2c_driver m5mols_i2c_driver = {
1031 .driver = {
1032 .name = MODULE_NAME,
1033 },
1034 .probe = m5mols_probe,
1035 .remove = m5mols_remove,
1036 .id_table = m5mols_id,
1037 };
1038
1039 module_i2c_driver(m5mols_i2c_driver);
1040
1041 MODULE_AUTHOR("HeungJun Kim <riverful.kim@samsung.com>");
1042 MODULE_AUTHOR("Dongsoo Kim <dongsoo45.kim@samsung.com>");
1043 MODULE_DESCRIPTION("Fujitsu M-5MOLS 8M Pixel camera driver");
1044 MODULE_LICENSE("GPL");
Linux with added FPC-III support