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cfq-iosched: fix use-after-free of cfqq
[deliverable/linux.git] / drivers / media / video / m5mols / m5mols_core.c
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/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 = V4L2_MBUS_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 = V4L2_MBUS_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(*((u16 *)data));
129 else
130 return be32_to_cpu(*((u32 *)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 static int m5mols_read(struct v4l2_subdev *sd, u32 size, u32 reg, u32 *val)
140 {
141 struct i2c_client *client = v4l2_get_subdevdata(sd);
142 u8 rbuf[M5MOLS_I2C_MAX_SIZE + 1];
143 u8 category = I2C_CATEGORY(reg);
144 u8 cmd = I2C_COMMAND(reg);
145 struct i2c_msg msg[2];
146 u8 wbuf[5];
147 int ret;
148
149 if (!client->adapter)
150 return -ENODEV;
151
152 msg[0].addr = client->addr;
153 msg[0].flags = 0;
154 msg[0].len = 5;
155 msg[0].buf = wbuf;
156 wbuf[0] = 5;
157 wbuf[1] = M5MOLS_BYTE_READ;
158 wbuf[2] = category;
159 wbuf[3] = cmd;
160 wbuf[4] = size;
161
162 msg[1].addr = client->addr;
163 msg[1].flags = I2C_M_RD;
164 msg[1].len = size + 1;
165 msg[1].buf = rbuf;
166
167 /* minimum stabilization time */
168 usleep_range(200, 200);
169
170 ret = i2c_transfer(client->adapter, msg, 2);
171 if (ret < 0) {
172 v4l2_err(sd, "read failed: size:%d cat:%02x cmd:%02x. %d\n",
173 size, category, cmd, ret);
174 return ret;
175 }
176
177 *val = m5mols_swap_byte(&rbuf[1], size);
178
179 return 0;
180 }
181
182 int m5mols_read_u8(struct v4l2_subdev *sd, u32 reg, u8 *val)
183 {
184 u32 val_32;
185 int ret;
186
187 if (I2C_SIZE(reg) != 1) {
188 v4l2_err(sd, "Wrong data size\n");
189 return -EINVAL;
190 }
191
192 ret = m5mols_read(sd, I2C_SIZE(reg), reg, &val_32);
193 if (ret)
194 return ret;
195
196 *val = (u8)val_32;
197 return ret;
198 }
199
200 int m5mols_read_u16(struct v4l2_subdev *sd, u32 reg, u16 *val)
201 {
202 u32 val_32;
203 int ret;
204
205 if (I2C_SIZE(reg) != 2) {
206 v4l2_err(sd, "Wrong data size\n");
207 return -EINVAL;
208 }
209
210 ret = m5mols_read(sd, I2C_SIZE(reg), reg, &val_32);
211 if (ret)
212 return ret;
213
214 *val = (u16)val_32;
215 return ret;
216 }
217
218 int m5mols_read_u32(struct v4l2_subdev *sd, u32 reg, u32 *val)
219 {
220 if (I2C_SIZE(reg) != 4) {
221 v4l2_err(sd, "Wrong data size\n");
222 return -EINVAL;
223 }
224
225 return m5mols_read(sd, I2C_SIZE(reg), reg, val);
226 }
227
228 /**
229 * m5mols_write - I2C command write function
230 * @reg: combination of size, category and command for the I2C packet
231 * @val: value to write
232 */
233 int m5mols_write(struct v4l2_subdev *sd, u32 reg, u32 val)
234 {
235 struct i2c_client *client = v4l2_get_subdevdata(sd);
236 u8 wbuf[M5MOLS_I2C_MAX_SIZE + 4];
237 u8 category = I2C_CATEGORY(reg);
238 u8 cmd = I2C_COMMAND(reg);
239 u8 size = I2C_SIZE(reg);
240 u32 *buf = (u32 *)&wbuf[4];
241 struct i2c_msg msg[1];
242 int ret;
243
244 if (!client->adapter)
245 return -ENODEV;
246
247 if (size != 1 && size != 2 && size != 4) {
248 v4l2_err(sd, "Wrong data size\n");
249 return -EINVAL;
250 }
251
252 msg->addr = client->addr;
253 msg->flags = 0;
254 msg->len = (u16)size + 4;
255 msg->buf = wbuf;
256 wbuf[0] = size + 4;
257 wbuf[1] = M5MOLS_BYTE_WRITE;
258 wbuf[2] = category;
259 wbuf[3] = cmd;
260
261 *buf = m5mols_swap_byte((u8 *)&val, size);
262
263 usleep_range(200, 200);
264
265 ret = i2c_transfer(client->adapter, msg, 1);
266 if (ret < 0) {
267 v4l2_err(sd, "write failed: size:%d cat:%02x cmd:%02x. %d\n",
268 size, category, cmd, ret);
269 return ret;
270 }
271
272 return 0;
273 }
274
275 int m5mols_busy(struct v4l2_subdev *sd, u8 category, u8 cmd, u8 mask)
276 {
277 u8 busy;
278 int i;
279 int ret;
280
281 for (i = 0; i < M5MOLS_I2C_CHECK_RETRY; i++) {
282 ret = m5mols_read_u8(sd, I2C_REG(category, cmd, 1), &busy);
283 if (ret < 0)
284 return ret;
285 if ((busy & mask) == mask)
286 return 0;
287 }
288 return -EBUSY;
289 }
290
291 /**
292 * m5mols_enable_interrupt - Clear interrupt pending bits and unmask interrupts
293 *
294 * Before writing desired interrupt value the INT_FACTOR register should
295 * be read to clear pending interrupts.
296 */
297 int m5mols_enable_interrupt(struct v4l2_subdev *sd, u8 reg)
298 {
299 struct m5mols_info *info = to_m5mols(sd);
300 u8 mask = is_available_af(info) ? REG_INT_AF : 0;
301 u8 dummy;
302 int ret;
303
304 ret = m5mols_read_u8(sd, SYSTEM_INT_FACTOR, &dummy);
305 if (!ret)
306 ret = m5mols_write(sd, SYSTEM_INT_ENABLE, reg & ~mask);
307 return ret;
308 }
309
310 /**
311 * m5mols_reg_mode - Write the mode and check busy status
312 *
313 * It always accompanies a little delay changing the M-5MOLS mode, so it is
314 * needed checking current busy status to guarantee right mode.
315 */
316 static int m5mols_reg_mode(struct v4l2_subdev *sd, u8 mode)
317 {
318 int ret = m5mols_write(sd, SYSTEM_SYSMODE, mode);
319
320 return ret ? ret : m5mols_busy(sd, CAT_SYSTEM, CAT0_SYSMODE, mode);
321 }
322
323 /**
324 * m5mols_mode - manage the M-5MOLS's mode
325 * @mode: the required operation mode
326 *
327 * The commands of M-5MOLS are grouped into specific modes. Each functionality
328 * can be guaranteed only when the sensor is operating in mode which which
329 * a command belongs to.
330 */
331 int m5mols_mode(struct m5mols_info *info, u8 mode)
332 {
333 struct v4l2_subdev *sd = &info->sd;
334 int ret = -EINVAL;
335 u8 reg;
336
337 if (mode < REG_PARAMETER || mode > REG_CAPTURE)
338 return ret;
339
340 ret = m5mols_read_u8(sd, SYSTEM_SYSMODE, &reg);
341 if ((!ret && reg == mode) || ret)
342 return ret;
343
344 switch (reg) {
345 case REG_PARAMETER:
346 ret = m5mols_reg_mode(sd, REG_MONITOR);
347 if (!ret && mode == REG_MONITOR)
348 break;
349 if (!ret)
350 ret = m5mols_reg_mode(sd, REG_CAPTURE);
351 break;
352
353 case REG_MONITOR:
354 if (mode == REG_PARAMETER) {
355 ret = m5mols_reg_mode(sd, REG_PARAMETER);
356 break;
357 }
358
359 ret = m5mols_reg_mode(sd, REG_CAPTURE);
360 break;
361
362 case REG_CAPTURE:
363 ret = m5mols_reg_mode(sd, REG_MONITOR);
364 if (!ret && mode == REG_MONITOR)
365 break;
366 if (!ret)
367 ret = m5mols_reg_mode(sd, REG_PARAMETER);
368 break;
369
370 default:
371 v4l2_warn(sd, "Wrong mode: %d\n", mode);
372 }
373
374 if (!ret)
375 info->mode = mode;
376
377 return ret;
378 }
379
380 /**
381 * m5mols_get_version - retrieve full revisions information of M-5MOLS
382 *
383 * The version information includes revisions of hardware and firmware,
384 * AutoFocus alghorithm version and the version string.
385 */
386 static int m5mols_get_version(struct v4l2_subdev *sd)
387 {
388 struct m5mols_info *info = to_m5mols(sd);
389 struct m5mols_version *ver = &info->ver;
390 u8 *str = ver->str;
391 int i;
392 int ret;
393
394 ret = m5mols_read_u8(sd, SYSTEM_VER_CUSTOMER, &ver->customer);
395 if (!ret)
396 ret = m5mols_read_u8(sd, SYSTEM_VER_PROJECT, &ver->project);
397 if (!ret)
398 ret = m5mols_read_u16(sd, SYSTEM_VER_FIRMWARE, &ver->fw);
399 if (!ret)
400 ret = m5mols_read_u16(sd, SYSTEM_VER_HARDWARE, &ver->hw);
401 if (!ret)
402 ret = m5mols_read_u16(sd, SYSTEM_VER_PARAMETER, &ver->param);
403 if (!ret)
404 ret = m5mols_read_u16(sd, SYSTEM_VER_AWB, &ver->awb);
405 if (!ret)
406 ret = m5mols_read_u8(sd, AF_VERSION, &ver->af);
407 if (ret)
408 return ret;
409
410 for (i = 0; i < VERSION_STRING_SIZE; i++) {
411 ret = m5mols_read_u8(sd, SYSTEM_VER_STRING, &str[i]);
412 if (ret)
413 return ret;
414 }
415
416 ver->fw = be16_to_cpu(ver->fw);
417 ver->hw = be16_to_cpu(ver->hw);
418 ver->param = be16_to_cpu(ver->param);
419 ver->awb = be16_to_cpu(ver->awb);
420
421 v4l2_info(sd, "Manufacturer\t[%s]\n",
422 is_manufacturer(info, REG_SAMSUNG_ELECTRO) ?
423 "Samsung Electro-Machanics" :
424 is_manufacturer(info, REG_SAMSUNG_OPTICS) ?
425 "Samsung Fiber-Optics" :
426 is_manufacturer(info, REG_SAMSUNG_TECHWIN) ?
427 "Samsung Techwin" : "None");
428 v4l2_info(sd, "Customer/Project\t[0x%02x/0x%02x]\n",
429 info->ver.customer, info->ver.project);
430
431 if (!is_available_af(info))
432 v4l2_info(sd, "No support Auto Focus on this firmware\n");
433
434 return ret;
435 }
436
437 /**
438 * __find_restype - Lookup M-5MOLS resolution type according to pixel code
439 * @code: pixel code
440 */
441 static enum m5mols_restype __find_restype(enum v4l2_mbus_pixelcode code)
442 {
443 enum m5mols_restype type = M5MOLS_RESTYPE_MONITOR;
444
445 do {
446 if (code == m5mols_default_ffmt[type].code)
447 return type;
448 } while (type++ != SIZE_DEFAULT_FFMT);
449
450 return 0;
451 }
452
453 /**
454 * __find_resolution - Lookup preset and type of M-5MOLS's resolution
455 * @mf: pixel format to find/negotiate the resolution preset for
456 * @type: M-5MOLS resolution type
457 * @resolution: M-5MOLS resolution preset register value
458 *
459 * Find nearest resolution matching resolution preset and adjust mf
460 * to supported values.
461 */
462 static int __find_resolution(struct v4l2_subdev *sd,
463 struct v4l2_mbus_framefmt *mf,
464 enum m5mols_restype *type,
465 u32 *resolution)
466 {
467 const struct m5mols_resolution *fsize = &m5mols_reg_res[0];
468 const struct m5mols_resolution *match = NULL;
469 enum m5mols_restype stype = __find_restype(mf->code);
470 int i = ARRAY_SIZE(m5mols_reg_res);
471 unsigned int min_err = ~0;
472
473 while (i--) {
474 int err;
475 if (stype == fsize->type) {
476 err = abs(fsize->width - mf->width)
477 + abs(fsize->height - mf->height);
478
479 if (err < min_err) {
480 min_err = err;
481 match = fsize;
482 }
483 }
484 fsize++;
485 }
486 if (match) {
487 mf->width = match->width;
488 mf->height = match->height;
489 *resolution = match->reg;
490 *type = stype;
491 return 0;
492 }
493
494 return -EINVAL;
495 }
496
497 static struct v4l2_mbus_framefmt *__find_format(struct m5mols_info *info,
498 struct v4l2_subdev_fh *fh,
499 enum v4l2_subdev_format_whence which,
500 enum m5mols_restype type)
501 {
502 if (which == V4L2_SUBDEV_FORMAT_TRY)
503 return fh ? v4l2_subdev_get_try_format(fh, 0) : NULL;
504
505 return &info->ffmt[type];
506 }
507
508 static int m5mols_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
509 struct v4l2_subdev_format *fmt)
510 {
511 struct m5mols_info *info = to_m5mols(sd);
512 struct v4l2_mbus_framefmt *format;
513
514 format = __find_format(info, fh, fmt->which, info->res_type);
515 if (!format)
516 return -EINVAL;
517
518 fmt->format = *format;
519 return 0;
520 }
521
522 static int m5mols_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
523 struct v4l2_subdev_format *fmt)
524 {
525 struct m5mols_info *info = to_m5mols(sd);
526 struct v4l2_mbus_framefmt *format = &fmt->format;
527 struct v4l2_mbus_framefmt *sfmt;
528 enum m5mols_restype type;
529 u32 resolution = 0;
530 int ret;
531
532 ret = __find_resolution(sd, format, &type, &resolution);
533 if (ret < 0)
534 return ret;
535
536 sfmt = __find_format(info, fh, fmt->which, type);
537 if (!sfmt)
538 return 0;
539
540
541 format->code = m5mols_default_ffmt[type].code;
542 format->colorspace = V4L2_COLORSPACE_JPEG;
543 format->field = V4L2_FIELD_NONE;
544
545 if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
546 *sfmt = *format;
547 info->resolution = resolution;
548 info->res_type = type;
549 }
550
551 return 0;
552 }
553
554 static int m5mols_enum_mbus_code(struct v4l2_subdev *sd,
555 struct v4l2_subdev_fh *fh,
556 struct v4l2_subdev_mbus_code_enum *code)
557 {
558 if (!code || code->index >= SIZE_DEFAULT_FFMT)
559 return -EINVAL;
560
561 code->code = m5mols_default_ffmt[code->index].code;
562
563 return 0;
564 }
565
566 static struct v4l2_subdev_pad_ops m5mols_pad_ops = {
567 .enum_mbus_code = m5mols_enum_mbus_code,
568 .get_fmt = m5mols_get_fmt,
569 .set_fmt = m5mols_set_fmt,
570 };
571
572 /**
573 * m5mols_sync_controls - Apply default scene mode and the current controls
574 *
575 * This is used only streaming for syncing between v4l2_ctrl framework and
576 * m5mols's controls. First, do the scenemode to the sensor, then call
577 * v4l2_ctrl_handler_setup. It can be same between some commands and
578 * the scenemode's in the default v4l2_ctrls. But, such commands of control
579 * should be prior to the scenemode's one.
580 */
581 int m5mols_sync_controls(struct m5mols_info *info)
582 {
583 int ret = -EINVAL;
584
585 if (!is_ctrl_synced(info)) {
586 ret = m5mols_do_scenemode(info, REG_SCENE_NORMAL);
587 if (ret)
588 return ret;
589
590 v4l2_ctrl_handler_setup(&info->handle);
591 info->ctrl_sync = true;
592 }
593
594 return ret;
595 }
596
597 /**
598 * m5mols_start_monitor - Start the monitor mode
599 *
600 * Before applying the controls setup the resolution and frame rate
601 * in PARAMETER mode, and then switch over to MONITOR mode.
602 */
603 static int m5mols_start_monitor(struct m5mols_info *info)
604 {
605 struct v4l2_subdev *sd = &info->sd;
606 int ret;
607
608 ret = m5mols_mode(info, REG_PARAMETER);
609 if (!ret)
610 ret = m5mols_write(sd, PARM_MON_SIZE, info->resolution);
611 if (!ret)
612 ret = m5mols_write(sd, PARM_MON_FPS, REG_FPS_30);
613 if (!ret)
614 ret = m5mols_mode(info, REG_MONITOR);
615 if (!ret)
616 ret = m5mols_sync_controls(info);
617
618 return ret;
619 }
620
621 static int m5mols_s_stream(struct v4l2_subdev *sd, int enable)
622 {
623 struct m5mols_info *info = to_m5mols(sd);
624 u32 code = info->ffmt[info->res_type].code;
625
626 if (enable) {
627 int ret = -EINVAL;
628
629 if (is_code(code, M5MOLS_RESTYPE_MONITOR))
630 ret = m5mols_start_monitor(info);
631 if (is_code(code, M5MOLS_RESTYPE_CAPTURE))
632 ret = m5mols_start_capture(info);
633
634 return ret;
635 }
636
637 return m5mols_mode(info, REG_PARAMETER);
638 }
639
640 static const struct v4l2_subdev_video_ops m5mols_video_ops = {
641 .s_stream = m5mols_s_stream,
642 };
643
644 static int m5mols_s_ctrl(struct v4l2_ctrl *ctrl)
645 {
646 struct v4l2_subdev *sd = to_sd(ctrl);
647 struct m5mols_info *info = to_m5mols(sd);
648 int ret;
649
650 info->mode_save = info->mode;
651
652 ret = m5mols_mode(info, REG_PARAMETER);
653 if (!ret)
654 ret = m5mols_set_ctrl(ctrl);
655 if (!ret)
656 ret = m5mols_mode(info, info->mode_save);
657
658 return ret;
659 }
660
661 static const struct v4l2_ctrl_ops m5mols_ctrl_ops = {
662 .s_ctrl = m5mols_s_ctrl,
663 };
664
665 static int m5mols_sensor_power(struct m5mols_info *info, bool enable)
666 {
667 struct v4l2_subdev *sd = &info->sd;
668 struct i2c_client *client = v4l2_get_subdevdata(sd);
669 const struct m5mols_platform_data *pdata = info->pdata;
670 int ret;
671
672 if (enable) {
673 if (is_powered(info))
674 return 0;
675
676 if (info->set_power) {
677 ret = info->set_power(&client->dev, 1);
678 if (ret)
679 return ret;
680 }
681
682 ret = regulator_bulk_enable(ARRAY_SIZE(supplies), supplies);
683 if (ret) {
684 info->set_power(&client->dev, 0);
685 return ret;
686 }
687
688 gpio_set_value(pdata->gpio_reset, !pdata->reset_polarity);
689 usleep_range(1000, 1000);
690 info->power = true;
691
692 return ret;
693 }
694
695 if (!is_powered(info))
696 return 0;
697
698 ret = regulator_bulk_disable(ARRAY_SIZE(supplies), supplies);
699 if (ret)
700 return ret;
701
702 if (info->set_power)
703 info->set_power(&client->dev, 0);
704
705 gpio_set_value(pdata->gpio_reset, pdata->reset_polarity);
706 usleep_range(1000, 1000);
707 info->power = false;
708
709 return ret;
710 }
711
712 /* m5mols_update_fw - optional firmware update routine */
713 int __attribute__ ((weak)) m5mols_update_fw(struct v4l2_subdev *sd,
714 int (*set_power)(struct m5mols_info *, bool))
715 {
716 return 0;
717 }
718
719 /**
720 * m5mols_sensor_armboot - Booting M-5MOLS internal ARM core.
721 *
722 * Booting internal ARM core makes the M-5MOLS is ready for getting commands
723 * with I2C. It's the first thing to be done after it powered up. It must wait
724 * at least 520ms recommended by M-5MOLS datasheet, after executing arm booting.
725 */
726 static int m5mols_sensor_armboot(struct v4l2_subdev *sd)
727 {
728 int ret;
729
730 ret = m5mols_write(sd, FLASH_CAM_START, REG_START_ARM_BOOT);
731 if (ret < 0)
732 return ret;
733
734 msleep(520);
735
736 ret = m5mols_get_version(sd);
737 if (!ret)
738 ret = m5mols_update_fw(sd, m5mols_sensor_power);
739 if (ret)
740 return ret;
741
742 v4l2_dbg(1, m5mols_debug, sd, "Success ARM Booting\n");
743
744 ret = m5mols_write(sd, PARM_INTERFACE, REG_INTERFACE_MIPI);
745 if (!ret)
746 ret = m5mols_enable_interrupt(sd, REG_INT_AF);
747
748 return ret;
749 }
750
751 static int m5mols_init_controls(struct m5mols_info *info)
752 {
753 struct v4l2_subdev *sd = &info->sd;
754 u16 max_exposure;
755 u16 step_zoom;
756 int ret;
757
758 /* Determine value's range & step of controls for various FW version */
759 ret = m5mols_read_u16(sd, AE_MAX_GAIN_MON, &max_exposure);
760 if (!ret)
761 step_zoom = is_manufacturer(info, REG_SAMSUNG_OPTICS) ? 31 : 1;
762 if (ret)
763 return ret;
764
765 v4l2_ctrl_handler_init(&info->handle, 6);
766 info->autowb = v4l2_ctrl_new_std(&info->handle,
767 &m5mols_ctrl_ops, V4L2_CID_AUTO_WHITE_BALANCE,
768 0, 1, 1, 0);
769 info->saturation = v4l2_ctrl_new_std(&info->handle,
770 &m5mols_ctrl_ops, V4L2_CID_SATURATION,
771 1, 5, 1, 3);
772 info->zoom = v4l2_ctrl_new_std(&info->handle,
773 &m5mols_ctrl_ops, V4L2_CID_ZOOM_ABSOLUTE,
774 1, 70, step_zoom, 1);
775 info->exposure = v4l2_ctrl_new_std(&info->handle,
776 &m5mols_ctrl_ops, V4L2_CID_EXPOSURE,
777 0, max_exposure, 1, (int)max_exposure/2);
778 info->colorfx = v4l2_ctrl_new_std_menu(&info->handle,
779 &m5mols_ctrl_ops, V4L2_CID_COLORFX,
780 4, (1 << V4L2_COLORFX_BW), V4L2_COLORFX_NONE);
781 info->autoexposure = v4l2_ctrl_new_std_menu(&info->handle,
782 &m5mols_ctrl_ops, V4L2_CID_EXPOSURE_AUTO,
783 1, 0, V4L2_EXPOSURE_MANUAL);
784
785 sd->ctrl_handler = &info->handle;
786 if (info->handle.error) {
787 v4l2_err(sd, "Failed to initialize controls: %d\n", ret);
788 v4l2_ctrl_handler_free(&info->handle);
789 return info->handle.error;
790 }
791
792 v4l2_ctrl_cluster(2, &info->autoexposure);
793
794 return 0;
795 }
796
797 /**
798 * m5mols_s_power - Main sensor power control function
799 *
800 * To prevent breaking the lens when the sensor is powered off the Soft-Landing
801 * algorithm is called where available. The Soft-Landing algorithm availability
802 * dependends on the firmware provider.
803 */
804 static int m5mols_s_power(struct v4l2_subdev *sd, int on)
805 {
806 struct m5mols_info *info = to_m5mols(sd);
807 int ret;
808
809 if (on) {
810 ret = m5mols_sensor_power(info, true);
811 if (!ret)
812 ret = m5mols_sensor_armboot(sd);
813 if (!ret)
814 ret = m5mols_init_controls(info);
815 if (ret)
816 return ret;
817
818 info->ffmt[M5MOLS_RESTYPE_MONITOR] =
819 m5mols_default_ffmt[M5MOLS_RESTYPE_MONITOR];
820 info->ffmt[M5MOLS_RESTYPE_CAPTURE] =
821 m5mols_default_ffmt[M5MOLS_RESTYPE_CAPTURE];
822 return ret;
823 }
824
825 if (is_manufacturer(info, REG_SAMSUNG_TECHWIN)) {
826 ret = m5mols_mode(info, REG_MONITOR);
827 if (!ret)
828 ret = m5mols_write(sd, AF_EXECUTE, REG_AF_STOP);
829 if (!ret)
830 ret = m5mols_write(sd, AF_MODE, REG_AF_POWEROFF);
831 if (!ret)
832 ret = m5mols_busy(sd, CAT_SYSTEM, CAT0_STATUS,
833 REG_AF_IDLE);
834 if (!ret)
835 v4l2_info(sd, "Success soft-landing lens\n");
836 }
837
838 ret = m5mols_sensor_power(info, false);
839 if (!ret) {
840 v4l2_ctrl_handler_free(&info->handle);
841 info->ctrl_sync = false;
842 }
843
844 return ret;
845 }
846
847 static int m5mols_log_status(struct v4l2_subdev *sd)
848 {
849 struct m5mols_info *info = to_m5mols(sd);
850
851 v4l2_ctrl_handler_log_status(&info->handle, sd->name);
852
853 return 0;
854 }
855
856 static const struct v4l2_subdev_core_ops m5mols_core_ops = {
857 .s_power = m5mols_s_power,
858 .g_ctrl = v4l2_subdev_g_ctrl,
859 .s_ctrl = v4l2_subdev_s_ctrl,
860 .queryctrl = v4l2_subdev_queryctrl,
861 .querymenu = v4l2_subdev_querymenu,
862 .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
863 .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
864 .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
865 .log_status = m5mols_log_status,
866 };
867
868 static const struct v4l2_subdev_ops m5mols_ops = {
869 .core = &m5mols_core_ops,
870 .pad = &m5mols_pad_ops,
871 .video = &m5mols_video_ops,
872 };
873
874 static void m5mols_irq_work(struct work_struct *work)
875 {
876 struct m5mols_info *info =
877 container_of(work, struct m5mols_info, work_irq);
878 struct v4l2_subdev *sd = &info->sd;
879 u8 reg;
880 int ret;
881
882 if (!is_powered(info) ||
883 m5mols_read_u8(sd, SYSTEM_INT_FACTOR, &info->interrupt))
884 return;
885
886 switch (info->interrupt & REG_INT_MASK) {
887 case REG_INT_AF:
888 if (!is_available_af(info))
889 break;
890 ret = m5mols_read_u8(sd, AF_STATUS, &reg);
891 v4l2_dbg(2, m5mols_debug, sd, "AF %s\n",
892 reg == REG_AF_FAIL ? "Failed" :
893 reg == REG_AF_SUCCESS ? "Success" :
894 reg == REG_AF_IDLE ? "Idle" : "Busy");
895 break;
896 case REG_INT_CAPTURE:
897 if (!test_and_set_bit(ST_CAPT_IRQ, &info->flags))
898 wake_up_interruptible(&info->irq_waitq);
899
900 v4l2_dbg(2, m5mols_debug, sd, "CAPTURE\n");
901 break;
902 default:
903 v4l2_dbg(2, m5mols_debug, sd, "Undefined: %02x\n", reg);
904 break;
905 };
906 }
907
908 static irqreturn_t m5mols_irq_handler(int irq, void *data)
909 {
910 struct v4l2_subdev *sd = data;
911 struct m5mols_info *info = to_m5mols(sd);
912
913 schedule_work(&info->work_irq);
914
915 return IRQ_HANDLED;
916 }
917
918 static int __devinit m5mols_probe(struct i2c_client *client,
919 const struct i2c_device_id *id)
920 {
921 const struct m5mols_platform_data *pdata = client->dev.platform_data;
922 struct m5mols_info *info;
923 struct v4l2_subdev *sd;
924 int ret;
925
926 if (pdata == NULL) {
927 dev_err(&client->dev, "No platform data\n");
928 return -EINVAL;
929 }
930
931 if (!gpio_is_valid(pdata->gpio_reset)) {
932 dev_err(&client->dev, "No valid RESET GPIO specified\n");
933 return -EINVAL;
934 }
935
936 if (!client->irq) {
937 dev_err(&client->dev, "Interrupt not assigned\n");
938 return -EINVAL;
939 }
940
941 info = kzalloc(sizeof(struct m5mols_info), GFP_KERNEL);
942 if (!info)
943 return -ENOMEM;
944
945 info->pdata = pdata;
946 info->set_power = pdata->set_power;
947
948 ret = gpio_request(pdata->gpio_reset, "M5MOLS_NRST");
949 if (ret) {
950 dev_err(&client->dev, "Failed to request gpio: %d\n", ret);
951 goto out_free;
952 }
953 gpio_direction_output(pdata->gpio_reset, pdata->reset_polarity);
954
955 ret = regulator_bulk_get(&client->dev, ARRAY_SIZE(supplies), supplies);
956 if (ret) {
957 dev_err(&client->dev, "Failed to get regulators: %d\n", ret);
958 goto out_gpio;
959 }
960
961 sd = &info->sd;
962 strlcpy(sd->name, MODULE_NAME, sizeof(sd->name));
963 v4l2_i2c_subdev_init(sd, client, &m5mols_ops);
964
965 info->pad.flags = MEDIA_PAD_FL_SOURCE;
966 ret = media_entity_init(&sd->entity, 1, &info->pad, 0);
967 if (ret < 0)
968 goto out_reg;
969 sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
970
971 init_waitqueue_head(&info->irq_waitq);
972 INIT_WORK(&info->work_irq, m5mols_irq_work);
973 ret = request_irq(client->irq, m5mols_irq_handler,
974 IRQF_TRIGGER_RISING, MODULE_NAME, sd);
975 if (ret) {
976 dev_err(&client->dev, "Interrupt request failed: %d\n", ret);
977 goto out_me;
978 }
979 info->res_type = M5MOLS_RESTYPE_MONITOR;
980 return 0;
981 out_me:
982 media_entity_cleanup(&sd->entity);
983 out_reg:
984 regulator_bulk_free(ARRAY_SIZE(supplies), supplies);
985 out_gpio:
986 gpio_free(pdata->gpio_reset);
987 out_free:
988 kfree(info);
989 return ret;
990 }
991
992 static int __devexit m5mols_remove(struct i2c_client *client)
993 {
994 struct v4l2_subdev *sd = i2c_get_clientdata(client);
995 struct m5mols_info *info = to_m5mols(sd);
996
997 v4l2_device_unregister_subdev(sd);
998 free_irq(client->irq, sd);
999
1000 regulator_bulk_free(ARRAY_SIZE(supplies), supplies);
1001 gpio_free(info->pdata->gpio_reset);
1002 media_entity_cleanup(&sd->entity);
1003 kfree(info);
1004 return 0;
1005 }
1006
1007 static const struct i2c_device_id m5mols_id[] = {
1008 { MODULE_NAME, 0 },
1009 { },
1010 };
1011 MODULE_DEVICE_TABLE(i2c, m5mols_id);
1012
1013 static struct i2c_driver m5mols_i2c_driver = {
1014 .driver = {
1015 .name = MODULE_NAME,
1016 },
1017 .probe = m5mols_probe,
1018 .remove = __devexit_p(m5mols_remove),
1019 .id_table = m5mols_id,
1020 };
1021
1022 static int __init m5mols_mod_init(void)
1023 {
1024 return i2c_add_driver(&m5mols_i2c_driver);
1025 }
1026
1027 static void __exit m5mols_mod_exit(void)
1028 {
1029 i2c_del_driver(&m5mols_i2c_driver);
1030 }
1031
1032 module_init(m5mols_mod_init);
1033 module_exit(m5mols_mod_exit);
1034
1035 MODULE_AUTHOR("HeungJun Kim <riverful.kim@samsung.com>");
1036 MODULE_AUTHOR("Dongsoo Kim <dongsoo45.kim@samsung.com>");
1037 MODULE_DESCRIPTION("Fujitsu M-5MOLS 8M Pixel camera driver");
1038 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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