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sh_eth: fix EESIPR values for SH77{34|63}
[linux/fpc-iii.git] / drivers / media / i2c / m5mols / m5mols_core.c
blobacb804bceccbc745b06da770ef7eb541d53118e6
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, 200);
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 usleep_range(200, 200);
272
273 ret = i2c_transfer(client->adapter, msg, 1);
274 if (ret == 1)
275 return 0;
276
277 if (info->isp_ready)
278 v4l2_err(sd, "write failed: cat:%02x cmd:%02x ret:%d\n",
279 category, cmd, ret);
280
281 return ret < 0 ? ret : -EIO;
282 }
283
284 /**
285 * m5mols_busy_wait - Busy waiting with I2C register polling
286 * @reg: the I2C_REG() address of an 8-bit status register to check
287 * @value: expected status register value
288 * @mask: bit mask for the read status register value
289 * @timeout: timeout in miliseconds, or -1 for default timeout
290 *
291 * The @reg register value is ORed with @mask before comparing with @value.
292 *
293 * Return: 0 if the requested condition became true within less than
294 * @timeout ms, or else negative errno.
295 */
296 int m5mols_busy_wait(struct v4l2_subdev *sd, u32 reg, u32 value, u32 mask,
297 int timeout)
298 {
299 int ms = timeout < 0 ? M5MOLS_BUSY_WAIT_DEF_TIMEOUT : timeout;
300 unsigned long end = jiffies + msecs_to_jiffies(ms);
301 u8 status;
302
303 do {
304 int ret = m5mols_read_u8(sd, reg, &status);
305
306 if (ret < 0 && !(mask & M5MOLS_I2C_RDY_WAIT_FL))
307 return ret;
308 if (!ret && (status & mask & 0xff) == (value & 0xff))
309 return 0;
310 usleep_range(100, 250);
311 } while (ms > 0 && time_is_after_jiffies(end));
312
313 return -EBUSY;
314 }
315
316 /**
317 * m5mols_enable_interrupt - Clear interrupt pending bits and unmask interrupts
318 *
319 * Before writing desired interrupt value the INT_FACTOR register should
320 * be read to clear pending interrupts.
321 */
322 int m5mols_enable_interrupt(struct v4l2_subdev *sd, u8 reg)
323 {
324 struct m5mols_info *info = to_m5mols(sd);
325 u8 mask = is_available_af(info) ? REG_INT_AF : 0;
326 u8 dummy;
327 int ret;
328
329 ret = m5mols_read_u8(sd, SYSTEM_INT_FACTOR, &dummy);
330 if (!ret)
331 ret = m5mols_write(sd, SYSTEM_INT_ENABLE, reg & ~mask);
332 return ret;
333 }
334
335 int m5mols_wait_interrupt(struct v4l2_subdev *sd, u8 irq_mask, u32 timeout)
336 {
337 struct m5mols_info *info = to_m5mols(sd);
338
339 int ret = wait_event_interruptible_timeout(info->irq_waitq,
340 atomic_add_unless(&info->irq_done, -1, 0),
341 msecs_to_jiffies(timeout));
342 if (ret <= 0)
343 return ret ? ret : -ETIMEDOUT;
344
345 return m5mols_busy_wait(sd, SYSTEM_INT_FACTOR, irq_mask,
346 M5MOLS_I2C_RDY_WAIT_FL | irq_mask, -1);
347 }
348
349 /**
350 * m5mols_reg_mode - Write the mode and check busy status
351 *
352 * It always accompanies a little delay changing the M-5MOLS mode, so it is
353 * needed checking current busy status to guarantee right mode.
354 */
355 static int m5mols_reg_mode(struct v4l2_subdev *sd, u8 mode)
356 {
357 int ret = m5mols_write(sd, SYSTEM_SYSMODE, mode);
358 if (ret < 0)
359 return ret;
360 return m5mols_busy_wait(sd, SYSTEM_SYSMODE, mode, 0xff,
361 M5MOLS_MODE_CHANGE_TIMEOUT);
362 }
363
364 /**
365 * m5mols_set_mode - set the M-5MOLS controller mode
366 * @mode: the required operation mode
367 *
368 * The commands of M-5MOLS are grouped into specific modes. Each functionality
369 * can be guaranteed only when the sensor is operating in mode which a command
370 * belongs to.
371 */
372 int m5mols_set_mode(struct m5mols_info *info, u8 mode)
373 {
374 struct v4l2_subdev *sd = &info->sd;
375 int ret = -EINVAL;
376 u8 reg;
377
378 if (mode < REG_PARAMETER || mode > REG_CAPTURE)
379 return ret;
380
381 ret = m5mols_read_u8(sd, SYSTEM_SYSMODE, &reg);
382 if (ret || reg == mode)
383 return ret;
384
385 switch (reg) {
386 case REG_PARAMETER:
387 ret = m5mols_reg_mode(sd, REG_MONITOR);
388 if (mode == REG_MONITOR)
389 break;
390 if (!ret)
391 ret = m5mols_reg_mode(sd, REG_CAPTURE);
392 break;
393
394 case REG_MONITOR:
395 if (mode == REG_PARAMETER) {
396 ret = m5mols_reg_mode(sd, REG_PARAMETER);
397 break;
398 }
399
400 ret = m5mols_reg_mode(sd, REG_CAPTURE);
401 break;
402
403 case REG_CAPTURE:
404 ret = m5mols_reg_mode(sd, REG_MONITOR);
405 if (mode == REG_MONITOR)
406 break;
407 if (!ret)
408 ret = m5mols_reg_mode(sd, REG_PARAMETER);
409 break;
410
411 default:
412 v4l2_warn(sd, "Wrong mode: %d\n", mode);
413 }
414
415 if (!ret)
416 info->mode = mode;
417
418 return ret;
419 }
420
421 /**
422 * m5mols_get_version - retrieve full revisions information of M-5MOLS
423 *
424 * The version information includes revisions of hardware and firmware,
425 * AutoFocus alghorithm version and the version string.
426 */
427 static int m5mols_get_version(struct v4l2_subdev *sd)
428 {
429 struct m5mols_info *info = to_m5mols(sd);
430 struct m5mols_version *ver = &info->ver;
431 u8 *str = ver->str;
432 int i;
433 int ret;
434
435 ret = m5mols_read_u8(sd, SYSTEM_VER_CUSTOMER, &ver->customer);
436 if (!ret)
437 ret = m5mols_read_u8(sd, SYSTEM_VER_PROJECT, &ver->project);
438 if (!ret)
439 ret = m5mols_read_u16(sd, SYSTEM_VER_FIRMWARE, &ver->fw);
440 if (!ret)
441 ret = m5mols_read_u16(sd, SYSTEM_VER_HARDWARE, &ver->hw);
442 if (!ret)
443 ret = m5mols_read_u16(sd, SYSTEM_VER_PARAMETER, &ver->param);
444 if (!ret)
445 ret = m5mols_read_u16(sd, SYSTEM_VER_AWB, &ver->awb);
446 if (!ret)
447 ret = m5mols_read_u8(sd, AF_VERSION, &ver->af);
448 if (ret)
449 return ret;
450
451 for (i = 0; i < VERSION_STRING_SIZE; i++) {
452 ret = m5mols_read_u8(sd, SYSTEM_VER_STRING, &str[i]);
453 if (ret)
454 return ret;
455 }
456
457 v4l2_info(sd, "Manufacturer\t[%s]\n",
458 is_manufacturer(info, REG_SAMSUNG_ELECTRO) ?
459 "Samsung Electro-Machanics" :
460 is_manufacturer(info, REG_SAMSUNG_OPTICS) ?
461 "Samsung Fiber-Optics" :
462 is_manufacturer(info, REG_SAMSUNG_TECHWIN) ?
463 "Samsung Techwin" : "None");
464 v4l2_info(sd, "Customer/Project\t[0x%02x/0x%02x]\n",
465 info->ver.customer, info->ver.project);
466
467 if (!is_available_af(info))
468 v4l2_info(sd, "No support Auto Focus on this firmware\n");
469
470 return ret;
471 }
472
473 /**
474 * __find_restype - Lookup M-5MOLS resolution type according to pixel code
475 * @code: pixel code
476 */
477 static enum m5mols_restype __find_restype(u32 code)
478 {
479 enum m5mols_restype type = M5MOLS_RESTYPE_MONITOR;
480
481 do {
482 if (code == m5mols_default_ffmt[type].code)
483 return type;
484 } while (type++ != SIZE_DEFAULT_FFMT);
485
486 return 0;
487 }
488
489 /**
490 * __find_resolution - Lookup preset and type of M-5MOLS's resolution
491 * @mf: pixel format to find/negotiate the resolution preset for
492 * @type: M-5MOLS resolution type
493 * @resolution: M-5MOLS resolution preset register value
494 *
495 * Find nearest resolution matching resolution preset and adjust mf
496 * to supported values.
497 */
498 static int __find_resolution(struct v4l2_subdev *sd,
499 struct v4l2_mbus_framefmt *mf,
500 enum m5mols_restype *type,
501 u32 *resolution)
502 {
503 const struct m5mols_resolution *fsize = &m5mols_reg_res[0];
504 const struct m5mols_resolution *match = NULL;
505 enum m5mols_restype stype = __find_restype(mf->code);
506 int i = ARRAY_SIZE(m5mols_reg_res);
507 unsigned int min_err = ~0;
508
509 while (i--) {
510 int err;
511 if (stype == fsize->type) {
512 err = abs(fsize->width - mf->width)
513 + abs(fsize->height - mf->height);
514
515 if (err < min_err) {
516 min_err = err;
517 match = fsize;
518 }
519 }
520 fsize++;
521 }
522 if (match) {
523 mf->width = match->width;
524 mf->height = match->height;
525 *resolution = match->reg;
526 *type = stype;
527 return 0;
528 }
529
530 return -EINVAL;
531 }
532
533 static struct v4l2_mbus_framefmt *__find_format(struct m5mols_info *info,
534 struct v4l2_subdev_pad_config *cfg,
535 enum v4l2_subdev_format_whence which,
536 enum m5mols_restype type)
537 {
538 if (which == V4L2_SUBDEV_FORMAT_TRY)
539 return cfg ? v4l2_subdev_get_try_format(&info->sd, cfg, 0) : NULL;
540
541 return &info->ffmt[type];
542 }
543
544 static int m5mols_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
545 struct v4l2_subdev_format *fmt)
546 {
547 struct m5mols_info *info = to_m5mols(sd);
548 struct v4l2_mbus_framefmt *format;
549 int ret = 0;
550
551 mutex_lock(&info->lock);
552
553 format = __find_format(info, cfg, fmt->which, info->res_type);
554 if (format)
555 fmt->format = *format;
556 else
557 ret = -EINVAL;
558
559 mutex_unlock(&info->lock);
560 return ret;
561 }
562
563 static int m5mols_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
564 struct v4l2_subdev_format *fmt)
565 {
566 struct m5mols_info *info = to_m5mols(sd);
567 struct v4l2_mbus_framefmt *format = &fmt->format;
568 struct v4l2_mbus_framefmt *sfmt;
569 enum m5mols_restype type;
570 u32 resolution = 0;
571 int ret;
572
573 ret = __find_resolution(sd, format, &type, &resolution);
574 if (ret < 0)
575 return ret;
576
577 sfmt = __find_format(info, cfg, fmt->which, type);
578 if (!sfmt)
579 return 0;
580
581 mutex_lock(&info->lock);
582
583 format->code = m5mols_default_ffmt[type].code;
584 format->colorspace = V4L2_COLORSPACE_JPEG;
585 format->field = V4L2_FIELD_NONE;
586
587 if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
588 *sfmt = *format;
589 info->resolution = resolution;
590 info->res_type = type;
591 }
592
593 mutex_unlock(&info->lock);
594 return ret;
595 }
596
597 static int m5mols_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
598 struct v4l2_mbus_frame_desc *fd)
599 {
600 struct m5mols_info *info = to_m5mols(sd);
601
602 if (pad != 0 || fd == NULL)
603 return -EINVAL;
604
605 mutex_lock(&info->lock);
606 /*
607 * .get_frame_desc is only used for compressed formats,
608 * thus we always return the capture frame parameters here.
609 */
610 fd->entry[0].length = info->cap.buf_size;
611 fd->entry[0].pixelcode = info->ffmt[M5MOLS_RESTYPE_CAPTURE].code;
612 mutex_unlock(&info->lock);
613
614 fd->entry[0].flags = V4L2_MBUS_FRAME_DESC_FL_LEN_MAX;
615 fd->num_entries = 1;
616
617 return 0;
618 }
619
620 static int m5mols_set_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
621 struct v4l2_mbus_frame_desc *fd)
622 {
623 struct m5mols_info *info = to_m5mols(sd);
624 struct v4l2_mbus_framefmt *mf = &info->ffmt[M5MOLS_RESTYPE_CAPTURE];
625
626 if (pad != 0 || fd == NULL)
627 return -EINVAL;
628
629 fd->entry[0].flags = V4L2_MBUS_FRAME_DESC_FL_LEN_MAX;
630 fd->num_entries = 1;
631 fd->entry[0].length = clamp_t(u32, fd->entry[0].length,
632 mf->width * mf->height,
633 M5MOLS_MAIN_JPEG_SIZE_MAX);
634 mutex_lock(&info->lock);
635 info->cap.buf_size = fd->entry[0].length;
636 mutex_unlock(&info->lock);
637
638 return 0;
639 }
640
641
642 static int m5mols_enum_mbus_code(struct v4l2_subdev *sd,
643 struct v4l2_subdev_pad_config *cfg,
644 struct v4l2_subdev_mbus_code_enum *code)
645 {
646 if (!code || code->index >= SIZE_DEFAULT_FFMT)
647 return -EINVAL;
648
649 code->code = m5mols_default_ffmt[code->index].code;
650
651 return 0;
652 }
653
654 static struct v4l2_subdev_pad_ops m5mols_pad_ops = {
655 .enum_mbus_code = m5mols_enum_mbus_code,
656 .get_fmt = m5mols_get_fmt,
657 .set_fmt = m5mols_set_fmt,
658 .get_frame_desc = m5mols_get_frame_desc,
659 .set_frame_desc = m5mols_set_frame_desc,
660 };
661
662 /**
663 * m5mols_restore_controls - Apply current control values to the registers
664 *
665 * m5mols_do_scenemode() handles all parameters for which there is yet no
666 * individual control. It should be replaced at some point by setting each
667 * control individually, in required register set up order.
668 */
669 int m5mols_restore_controls(struct m5mols_info *info)
670 {
671 int ret;
672
673 if (info->ctrl_sync)
674 return 0;
675
676 ret = m5mols_do_scenemode(info, REG_SCENE_NORMAL);
677 if (ret)
678 return ret;
679
680 ret = v4l2_ctrl_handler_setup(&info->handle);
681 info->ctrl_sync = !ret;
682
683 return ret;
684 }
685
686 /**
687 * m5mols_start_monitor - Start the monitor mode
688 *
689 * Before applying the controls setup the resolution and frame rate
690 * in PARAMETER mode, and then switch over to MONITOR mode.
691 */
692 static int m5mols_start_monitor(struct m5mols_info *info)
693 {
694 struct v4l2_subdev *sd = &info->sd;
695 int ret;
696
697 ret = m5mols_set_mode(info, REG_PARAMETER);
698 if (!ret)
699 ret = m5mols_write(sd, PARM_MON_SIZE, info->resolution);
700 if (!ret)
701 ret = m5mols_write(sd, PARM_MON_FPS, REG_FPS_30);
702 if (!ret)
703 ret = m5mols_set_mode(info, REG_MONITOR);
704 if (!ret)
705 ret = m5mols_restore_controls(info);
706
707 return ret;
708 }
709
710 static int m5mols_s_stream(struct v4l2_subdev *sd, int enable)
711 {
712 struct m5mols_info *info = to_m5mols(sd);
713 u32 code;
714 int ret;
715
716 mutex_lock(&info->lock);
717 code = info->ffmt[info->res_type].code;
718
719 if (enable) {
720 if (is_code(code, M5MOLS_RESTYPE_MONITOR))
721 ret = m5mols_start_monitor(info);
722 else if (is_code(code, M5MOLS_RESTYPE_CAPTURE))
723 ret = m5mols_start_capture(info);
724 else
725 ret = -EINVAL;
726 } else {
727 ret = m5mols_set_mode(info, REG_PARAMETER);
728 }
729
730 mutex_unlock(&info->lock);
731 return ret;
732 }
733
734 static const struct v4l2_subdev_video_ops m5mols_video_ops = {
735 .s_stream = m5mols_s_stream,
736 };
737
738 static int m5mols_sensor_power(struct m5mols_info *info, bool enable)
739 {
740 struct v4l2_subdev *sd = &info->sd;
741 struct i2c_client *client = v4l2_get_subdevdata(sd);
742 const struct m5mols_platform_data *pdata = info->pdata;
743 int ret;
744
745 if (info->power == enable)
746 return 0;
747
748 if (enable) {
749 if (info->set_power) {
750 ret = info->set_power(&client->dev, 1);
751 if (ret)
752 return ret;
753 }
754
755 ret = regulator_bulk_enable(ARRAY_SIZE(supplies), supplies);
756 if (ret) {
757 info->set_power(&client->dev, 0);
758 return ret;
759 }
760
761 gpio_set_value(pdata->gpio_reset, !pdata->reset_polarity);
762 info->power = 1;
763
764 return ret;
765 }
766
767 ret = regulator_bulk_disable(ARRAY_SIZE(supplies), supplies);
768 if (ret)
769 return ret;
770
771 if (info->set_power)
772 info->set_power(&client->dev, 0);
773
774 gpio_set_value(pdata->gpio_reset, pdata->reset_polarity);
775
776 info->isp_ready = 0;
777 info->power = 0;
778
779 return ret;
780 }
781
782 /* m5mols_update_fw - optional firmware update routine */
783 int __attribute__ ((weak)) m5mols_update_fw(struct v4l2_subdev *sd,
784 int (*set_power)(struct m5mols_info *, bool))
785 {
786 return 0;
787 }
788
789 /**
790 * m5mols_fw_start - M-5MOLS internal ARM controller initialization
791 *
792 * Execute the M-5MOLS internal ARM controller initialization sequence.
793 * This function should be called after the supply voltage has been
794 * applied and before any requests to the device are made.
795 */
796 static int m5mols_fw_start(struct v4l2_subdev *sd)
797 {
798 struct m5mols_info *info = to_m5mols(sd);
799 int ret;
800
801 atomic_set(&info->irq_done, 0);
802 /* Wait until I2C slave is initialized in Flash Writer mode */
803 ret = m5mols_busy_wait(sd, FLASH_CAM_START, REG_IN_FLASH_MODE,
804 M5MOLS_I2C_RDY_WAIT_FL | 0xff, -1);
805 if (!ret)
806 ret = m5mols_write(sd, FLASH_CAM_START, REG_START_ARM_BOOT);
807 if (!ret)
808 ret = m5mols_wait_interrupt(sd, REG_INT_MODE, 2000);
809 if (ret < 0)
810 return ret;
811
812 info->isp_ready = 1;
813
814 ret = m5mols_get_version(sd);
815 if (!ret)
816 ret = m5mols_update_fw(sd, m5mols_sensor_power);
817 if (ret)
818 return ret;
819
820 v4l2_dbg(1, m5mols_debug, sd, "Success ARM Booting\n");
821
822 ret = m5mols_write(sd, PARM_INTERFACE, REG_INTERFACE_MIPI);
823 if (!ret)
824 ret = m5mols_enable_interrupt(sd,
825 REG_INT_AF | REG_INT_CAPTURE);
826
827 return ret;
828 }
829
830 /* Execute the lens soft-landing algorithm */
831 static int m5mols_auto_focus_stop(struct m5mols_info *info)
832 {
833 int ret;
834
835 ret = m5mols_write(&info->sd, AF_EXECUTE, REG_AF_STOP);
836 if (!ret)
837 ret = m5mols_write(&info->sd, AF_MODE, REG_AF_POWEROFF);
838 if (!ret)
839 ret = m5mols_busy_wait(&info->sd, SYSTEM_STATUS, REG_AF_IDLE,
840 0xff, -1);
841 return ret;
842 }
843
844 /**
845 * m5mols_s_power - Main sensor power control function
846 *
847 * To prevent breaking the lens when the sensor is powered off the Soft-Landing
848 * algorithm is called where available. The Soft-Landing algorithm availability
849 * dependends on the firmware provider.
850 */
851 static int m5mols_s_power(struct v4l2_subdev *sd, int on)
852 {
853 struct m5mols_info *info = to_m5mols(sd);
854 int ret;
855
856 mutex_lock(&info->lock);
857
858 if (on) {
859 ret = m5mols_sensor_power(info, true);
860 if (!ret)
861 ret = m5mols_fw_start(sd);
862 } else {
863 if (is_manufacturer(info, REG_SAMSUNG_TECHWIN)) {
864 ret = m5mols_set_mode(info, REG_MONITOR);
865 if (!ret)
866 ret = m5mols_auto_focus_stop(info);
867 if (ret < 0)
868 v4l2_warn(sd, "Soft landing lens failed\n");
869 }
870 ret = m5mols_sensor_power(info, false);
871
872 info->ctrl_sync = 0;
873 }
874
875 mutex_unlock(&info->lock);
876 return ret;
877 }
878
879 static int m5mols_log_status(struct v4l2_subdev *sd)
880 {
881 struct m5mols_info *info = to_m5mols(sd);
882
883 v4l2_ctrl_handler_log_status(&info->handle, sd->name);
884
885 return 0;
886 }
887
888 static const struct v4l2_subdev_core_ops m5mols_core_ops = {
889 .s_power = m5mols_s_power,
890 .log_status = m5mols_log_status,
891 };
892
893 /*
894 * V4L2 subdev internal operations
895 */
896 static int m5mols_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
897 {
898 struct v4l2_mbus_framefmt *format = v4l2_subdev_get_try_format(sd, fh->pad, 0);
899
900 *format = m5mols_default_ffmt[0];
901 return 0;
902 }
903
904 static const struct v4l2_subdev_internal_ops m5mols_subdev_internal_ops = {
905 .open = m5mols_open,
906 };
907
908 static const struct v4l2_subdev_ops m5mols_ops = {
909 .core = &m5mols_core_ops,
910 .pad = &m5mols_pad_ops,
911 .video = &m5mols_video_ops,
912 };
913
914 static irqreturn_t m5mols_irq_handler(int irq, void *data)
915 {
916 struct m5mols_info *info = to_m5mols(data);
917
918 atomic_set(&info->irq_done, 1);
919 wake_up_interruptible(&info->irq_waitq);
920
921 return IRQ_HANDLED;
922 }
923
924 static int m5mols_probe(struct i2c_client *client,
925 const struct i2c_device_id *id)
926 {
927 const struct m5mols_platform_data *pdata = client->dev.platform_data;
928 unsigned long gpio_flags;
929 struct m5mols_info *info;
930 struct v4l2_subdev *sd;
931 int ret;
932
933 if (pdata == NULL) {
934 dev_err(&client->dev, "No platform data\n");
935 return -EINVAL;
936 }
937
938 if (!gpio_is_valid(pdata->gpio_reset)) {
939 dev_err(&client->dev, "No valid RESET GPIO specified\n");
940 return -EINVAL;
941 }
942
943 if (!client->irq) {
944 dev_err(&client->dev, "Interrupt not assigned\n");
945 return -EINVAL;
946 }
947
948 info = devm_kzalloc(&client->dev, sizeof(*info), GFP_KERNEL);
949 if (!info)
950 return -ENOMEM;
951
952 info->pdata = pdata;
953 info->set_power = pdata->set_power;
954
955 gpio_flags = pdata->reset_polarity
956 ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW;
957 ret = devm_gpio_request_one(&client->dev, pdata->gpio_reset, gpio_flags,
958 "M5MOLS_NRST");
959 if (ret) {
960 dev_err(&client->dev, "Failed to request gpio: %d\n", ret);
961 return ret;
962 }
963
964 ret = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(supplies),
965 supplies);
966 if (ret) {
967 dev_err(&client->dev, "Failed to get regulators: %d\n", ret);
968 return ret;
969 }
970
971 sd = &info->sd;
972 v4l2_i2c_subdev_init(sd, client, &m5mols_ops);
973 strlcpy(sd->name, MODULE_NAME, sizeof(sd->name));
974 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
975
976 sd->internal_ops = &m5mols_subdev_internal_ops;
977 info->pad.flags = MEDIA_PAD_FL_SOURCE;
978 ret = media_entity_pads_init(&sd->entity, 1, &info->pad);
979 if (ret < 0)
980 return ret;
981 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
982
983 init_waitqueue_head(&info->irq_waitq);
984 mutex_init(&info->lock);
985
986 ret = devm_request_irq(&client->dev, client->irq, m5mols_irq_handler,
987 IRQF_TRIGGER_RISING, MODULE_NAME, sd);
988 if (ret) {
989 dev_err(&client->dev, "Interrupt request failed: %d\n", ret);
990 goto error;
991 }
992 info->res_type = M5MOLS_RESTYPE_MONITOR;
993 info->ffmt[0] = m5mols_default_ffmt[0];
994 info->ffmt[1] = m5mols_default_ffmt[1];
995
996 ret = m5mols_sensor_power(info, true);
997 if (ret)
998 goto error;
999
1000 ret = m5mols_fw_start(sd);
1001 if (!ret)
1002 ret = m5mols_init_controls(sd);
1003
1004 ret = m5mols_sensor_power(info, false);
1005 if (!ret)
1006 return 0;
1007 error:
1008 media_entity_cleanup(&sd->entity);
1009 return ret;
1010 }
1011
1012 static int m5mols_remove(struct i2c_client *client)
1013 {
1014 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1015
1016 v4l2_device_unregister_subdev(sd);
1017 v4l2_ctrl_handler_free(sd->ctrl_handler);
1018 media_entity_cleanup(&sd->entity);
1019
1020 return 0;
1021 }
1022
1023 static const struct i2c_device_id m5mols_id[] = {
1024 { MODULE_NAME, 0 },
1025 { },
1026 };
1027 MODULE_DEVICE_TABLE(i2c, m5mols_id);
1028
1029 static struct i2c_driver m5mols_i2c_driver = {
1030 .driver = {
1031 .name = MODULE_NAME,
1032 },
1033 .probe = m5mols_probe,
1034 .remove = m5mols_remove,
1035 .id_table = m5mols_id,
1036 };
1037
1038 module_i2c_driver(m5mols_i2c_driver);
1039
1040 MODULE_AUTHOR("HeungJun Kim <riverful.kim@samsung.com>");
1041 MODULE_AUTHOR("Dongsoo Kim <dongsoo45.kim@samsung.com>");
1042 MODULE_DESCRIPTION("Fujitsu M-5MOLS 8M Pixel camera driver");
1043 MODULE_LICENSE("GPL");
Linux with added FPC-III support