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1 | /* |
2 | * et8ek8_driver.c | |
3 | * | |
4 | * Copyright (C) 2008 Nokia Corporation | |
5 | * | |
6 | * Contact: Sakari Ailus <sakari.ailus@iki.fi> | |
7 | * Tuukka Toivonen <tuukkat76@gmail.com> | |
8 | * Pavel Machek <pavel@ucw.cz> | |
9 | * | |
10 | * Based on code from Toni Leinonen <toni.leinonen@offcode.fi>. | |
11 | * | |
12 | * This driver is based on the Micron MT9T012 camera imager driver | |
13 | * (C) Texas Instruments. | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License | |
17 | * version 2 as published by the Free Software Foundation. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, but | |
20 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
22 | * General Public License for more details. | |
23 | */ | |
24 | ||
25 | #include <linux/clk.h> | |
26 | #include <linux/delay.h> | |
27 | #include <linux/gpio/consumer.h> | |
28 | #include <linux/i2c.h> | |
29 | #include <linux/kernel.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/mutex.h> | |
32 | #include <linux/regulator/consumer.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/sort.h> | |
35 | #include <linux/v4l2-mediabus.h> | |
36 | ||
37 | #include <media/media-entity.h> | |
38 | #include <media/v4l2-ctrls.h> | |
39 | #include <media/v4l2-device.h> | |
40 | #include <media/v4l2-subdev.h> | |
41 | ||
42 | #include "et8ek8_reg.h" | |
43 | ||
44 | #define ET8EK8_NAME "et8ek8" | |
45 | #define ET8EK8_PRIV_MEM_SIZE 128 | |
46 | #define ET8EK8_MAX_MSG 48 | |
47 | ||
48 | struct et8ek8_sensor { | |
49 | struct v4l2_subdev subdev; | |
50 | struct media_pad pad; | |
51 | struct v4l2_mbus_framefmt format; | |
52 | struct gpio_desc *reset; | |
53 | struct regulator *vana; | |
54 | struct clk *ext_clk; | |
55 | u32 xclk_freq; | |
56 | ||
57 | u16 version; | |
58 | ||
59 | struct v4l2_ctrl_handler ctrl_handler; | |
60 | struct v4l2_ctrl *exposure; | |
61 | struct v4l2_ctrl *pixel_rate; | |
62 | struct et8ek8_reglist *current_reglist; | |
63 | ||
64 | u8 priv_mem[ET8EK8_PRIV_MEM_SIZE]; | |
65 | ||
66 | struct mutex power_lock; | |
67 | int power_count; | |
68 | }; | |
69 | ||
70 | #define to_et8ek8_sensor(sd) container_of(sd, struct et8ek8_sensor, subdev) | |
71 | ||
72 | enum et8ek8_versions { | |
73 | ET8EK8_REV_1 = 0x0001, | |
74 | ET8EK8_REV_2, | |
75 | }; | |
76 | ||
77 | /* | |
78 | * This table describes what should be written to the sensor register | |
79 | * for each gain value. The gain(index in the table) is in terms of | |
80 | * 0.1EV, i.e. 10 indexes in the table give 2 time more gain [0] in | |
81 | * the *analog gain, [1] in the digital gain | |
82 | * | |
83 | * Analog gain [dB] = 20*log10(regvalue/32); 0x20..0x100 | |
84 | */ | |
85 | static struct et8ek8_gain { | |
86 | u16 analog; | |
87 | u16 digital; | |
88 | } const et8ek8_gain_table[] = { | |
89 | { 32, 0}, /* x1 */ | |
90 | { 34, 0}, | |
91 | { 37, 0}, | |
92 | { 39, 0}, | |
93 | { 42, 0}, | |
94 | { 45, 0}, | |
95 | { 49, 0}, | |
96 | { 52, 0}, | |
97 | { 56, 0}, | |
98 | { 60, 0}, | |
99 | { 64, 0}, /* x2 */ | |
100 | { 69, 0}, | |
101 | { 74, 0}, | |
102 | { 79, 0}, | |
103 | { 84, 0}, | |
104 | { 91, 0}, | |
105 | { 97, 0}, | |
106 | {104, 0}, | |
107 | {111, 0}, | |
108 | {119, 0}, | |
109 | {128, 0}, /* x4 */ | |
110 | {137, 0}, | |
111 | {147, 0}, | |
112 | {158, 0}, | |
113 | {169, 0}, | |
114 | {181, 0}, | |
115 | {194, 0}, | |
116 | {208, 0}, | |
117 | {223, 0}, | |
118 | {239, 0}, | |
119 | {256, 0}, /* x8 */ | |
120 | {256, 73}, | |
121 | {256, 152}, | |
122 | {256, 236}, | |
123 | {256, 327}, | |
124 | {256, 424}, | |
125 | {256, 528}, | |
126 | {256, 639}, | |
127 | {256, 758}, | |
128 | {256, 886}, | |
129 | {256, 1023}, /* x16 */ | |
130 | }; | |
131 | ||
132 | /* Register definitions */ | |
133 | #define REG_REVISION_NUMBER_L 0x1200 | |
134 | #define REG_REVISION_NUMBER_H 0x1201 | |
135 | ||
136 | #define PRIV_MEM_START_REG 0x0008 | |
137 | #define PRIV_MEM_WIN_SIZE 8 | |
138 | ||
139 | #define ET8EK8_I2C_DELAY 3 /* msec delay b/w accesses */ | |
140 | ||
141 | #define USE_CRC 1 | |
142 | ||
143 | /* | |
144 | * Register access helpers | |
145 | * | |
146 | * Read a 8/16/32-bit i2c register. The value is returned in 'val'. | |
147 | * Returns zero if successful, or non-zero otherwise. | |
148 | */ | |
149 | static int et8ek8_i2c_read_reg(struct i2c_client *client, u16 data_length, | |
150 | u16 reg, u32 *val) | |
151 | { | |
152 | int r; | |
153 | struct i2c_msg msg; | |
154 | unsigned char data[4]; | |
155 | ||
156 | if (!client->adapter) | |
157 | return -ENODEV; | |
158 | if (data_length != ET8EK8_REG_8BIT && data_length != ET8EK8_REG_16BIT) | |
159 | return -EINVAL; | |
160 | ||
161 | msg.addr = client->addr; | |
162 | msg.flags = 0; | |
163 | msg.len = 2; | |
164 | msg.buf = data; | |
165 | ||
166 | /* high byte goes out first */ | |
167 | data[0] = (u8) (reg >> 8); | |
168 | data[1] = (u8) (reg & 0xff); | |
169 | r = i2c_transfer(client->adapter, &msg, 1); | |
170 | if (r < 0) | |
171 | goto err; | |
172 | ||
173 | msg.len = data_length; | |
174 | msg.flags = I2C_M_RD; | |
175 | r = i2c_transfer(client->adapter, &msg, 1); | |
176 | if (r < 0) | |
177 | goto err; | |
178 | ||
179 | *val = 0; | |
180 | /* high byte comes first */ | |
181 | if (data_length == ET8EK8_REG_8BIT) | |
182 | *val = data[0]; | |
183 | else | |
184 | *val = (data[1] << 8) + data[0]; | |
185 | ||
186 | return 0; | |
187 | ||
188 | err: | |
189 | dev_err(&client->dev, "read from offset 0x%x error %d\n", reg, r); | |
190 | ||
191 | return r; | |
192 | } | |
193 | ||
194 | static void et8ek8_i2c_create_msg(struct i2c_client *client, u16 len, u16 reg, | |
195 | u32 val, struct i2c_msg *msg, | |
196 | unsigned char *buf) | |
197 | { | |
198 | msg->addr = client->addr; | |
199 | msg->flags = 0; /* Write */ | |
200 | msg->len = 2 + len; | |
201 | msg->buf = buf; | |
202 | ||
203 | /* high byte goes out first */ | |
204 | buf[0] = (u8) (reg >> 8); | |
205 | buf[1] = (u8) (reg & 0xff); | |
206 | ||
207 | switch (len) { | |
208 | case ET8EK8_REG_8BIT: | |
209 | buf[2] = (u8) (val) & 0xff; | |
210 | break; | |
211 | case ET8EK8_REG_16BIT: | |
212 | buf[2] = (u8) (val) & 0xff; | |
213 | buf[3] = (u8) (val >> 8) & 0xff; | |
214 | break; | |
215 | default: | |
216 | WARN_ONCE(1, ET8EK8_NAME ": %s: invalid message length.\n", | |
217 | __func__); | |
218 | } | |
219 | } | |
220 | ||
221 | /* | |
222 | * A buffered write method that puts the wanted register write | |
223 | * commands in a message list and passes the list to the i2c framework | |
224 | */ | |
225 | static int et8ek8_i2c_buffered_write_regs(struct i2c_client *client, | |
226 | const struct et8ek8_reg *wnext, | |
227 | int cnt) | |
228 | { | |
229 | struct i2c_msg msg[ET8EK8_MAX_MSG]; | |
230 | unsigned char data[ET8EK8_MAX_MSG][6]; | |
231 | int wcnt = 0; | |
232 | u16 reg, data_length; | |
233 | u32 val; | |
234 | ||
235 | if (WARN_ONCE(cnt > ET8EK8_MAX_MSG, | |
236 | ET8EK8_NAME ": %s: too many messages.\n", __func__)) { | |
237 | return -EINVAL; | |
238 | } | |
239 | ||
240 | /* Create new write messages for all writes */ | |
241 | while (wcnt < cnt) { | |
242 | data_length = wnext->type; | |
243 | reg = wnext->reg; | |
244 | val = wnext->val; | |
245 | wnext++; | |
246 | ||
247 | et8ek8_i2c_create_msg(client, data_length, reg, | |
248 | val, &msg[wcnt], &data[wcnt][0]); | |
249 | ||
250 | /* Update write count */ | |
251 | wcnt++; | |
252 | } | |
253 | ||
254 | /* Now we send everything ... */ | |
255 | return i2c_transfer(client->adapter, msg, wcnt); | |
256 | } | |
257 | ||
258 | /* | |
259 | * Write a list of registers to i2c device. | |
260 | * | |
261 | * The list of registers is terminated by ET8EK8_REG_TERM. | |
262 | * Returns zero if successful, or non-zero otherwise. | |
263 | */ | |
264 | static int et8ek8_i2c_write_regs(struct i2c_client *client, | |
265 | const struct et8ek8_reg *regs) | |
266 | { | |
267 | int r, cnt = 0; | |
268 | const struct et8ek8_reg *next; | |
269 | ||
270 | if (!client->adapter) | |
271 | return -ENODEV; | |
272 | ||
273 | if (!regs) | |
274 | return -EINVAL; | |
275 | ||
276 | /* Initialize list pointers to the start of the list */ | |
277 | next = regs; | |
278 | ||
279 | do { | |
280 | /* | |
281 | * We have to go through the list to figure out how | |
282 | * many regular writes we have in a row | |
283 | */ | |
284 | while (next->type != ET8EK8_REG_TERM && | |
285 | next->type != ET8EK8_REG_DELAY) { | |
286 | /* | |
287 | * Here we check that the actual length fields | |
288 | * are valid | |
289 | */ | |
290 | if (WARN(next->type != ET8EK8_REG_8BIT && | |
291 | next->type != ET8EK8_REG_16BIT, | |
292 | "Invalid type = %d", next->type)) { | |
293 | return -EINVAL; | |
294 | } | |
295 | /* | |
296 | * Increment count of successive writes and | |
297 | * read pointer | |
298 | */ | |
299 | cnt++; | |
300 | next++; | |
301 | } | |
302 | ||
303 | /* Now we start writing ... */ | |
304 | r = et8ek8_i2c_buffered_write_regs(client, regs, cnt); | |
305 | ||
306 | /* ... and then check that everything was OK */ | |
307 | if (r < 0) { | |
308 | dev_err(&client->dev, "i2c transfer error!\n"); | |
309 | return r; | |
310 | } | |
311 | ||
312 | /* | |
313 | * If we ran into a sleep statement when going through | |
314 | * the list, this is where we snooze for the required time | |
315 | */ | |
316 | if (next->type == ET8EK8_REG_DELAY) { | |
317 | msleep(next->val); | |
318 | /* | |
319 | * ZZZ ... | |
320 | * Update list pointers and cnt and start over ... | |
321 | */ | |
322 | next++; | |
323 | regs = next; | |
324 | cnt = 0; | |
325 | } | |
326 | } while (next->type != ET8EK8_REG_TERM); | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
331 | /* | |
332 | * Write to a 8/16-bit register. | |
333 | * Returns zero if successful, or non-zero otherwise. | |
334 | */ | |
335 | static int et8ek8_i2c_write_reg(struct i2c_client *client, u16 data_length, | |
336 | u16 reg, u32 val) | |
337 | { | |
338 | int r; | |
339 | struct i2c_msg msg; | |
340 | unsigned char data[6]; | |
341 | ||
342 | if (!client->adapter) | |
343 | return -ENODEV; | |
344 | if (data_length != ET8EK8_REG_8BIT && data_length != ET8EK8_REG_16BIT) | |
345 | return -EINVAL; | |
346 | ||
347 | et8ek8_i2c_create_msg(client, data_length, reg, val, &msg, data); | |
348 | ||
349 | r = i2c_transfer(client->adapter, &msg, 1); | |
350 | if (r < 0) { | |
351 | dev_err(&client->dev, | |
352 | "wrote 0x%x to offset 0x%x error %d\n", val, reg, r); | |
353 | return r; | |
354 | } | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
359 | static struct et8ek8_reglist *et8ek8_reglist_find_type( | |
360 | struct et8ek8_meta_reglist *meta, | |
361 | u16 type) | |
362 | { | |
363 | struct et8ek8_reglist **next = &meta->reglist[0].ptr; | |
364 | ||
365 | while (*next) { | |
366 | if ((*next)->type == type) | |
367 | return *next; | |
368 | ||
369 | next++; | |
370 | } | |
371 | ||
372 | return NULL; | |
373 | } | |
374 | ||
375 | static int et8ek8_i2c_reglist_find_write(struct i2c_client *client, | |
376 | struct et8ek8_meta_reglist *meta, | |
377 | u16 type) | |
378 | { | |
379 | struct et8ek8_reglist *reglist; | |
380 | ||
381 | reglist = et8ek8_reglist_find_type(meta, type); | |
382 | if (!reglist) | |
383 | return -EINVAL; | |
384 | ||
385 | return et8ek8_i2c_write_regs(client, reglist->regs); | |
386 | } | |
387 | ||
388 | static struct et8ek8_reglist **et8ek8_reglist_first( | |
389 | struct et8ek8_meta_reglist *meta) | |
390 | { | |
391 | return &meta->reglist[0].ptr; | |
392 | } | |
393 | ||
394 | static void et8ek8_reglist_to_mbus(const struct et8ek8_reglist *reglist, | |
395 | struct v4l2_mbus_framefmt *fmt) | |
396 | { | |
397 | fmt->width = reglist->mode.window_width; | |
398 | fmt->height = reglist->mode.window_height; | |
399 | fmt->code = reglist->mode.bus_format; | |
400 | } | |
401 | ||
402 | static struct et8ek8_reglist *et8ek8_reglist_find_mode_fmt( | |
403 | struct et8ek8_meta_reglist *meta, | |
404 | struct v4l2_mbus_framefmt *fmt) | |
405 | { | |
406 | struct et8ek8_reglist **list = et8ek8_reglist_first(meta); | |
407 | struct et8ek8_reglist *best_match = NULL; | |
408 | struct et8ek8_reglist *best_other = NULL; | |
409 | struct v4l2_mbus_framefmt format; | |
410 | unsigned int max_dist_match = (unsigned int)-1; | |
411 | unsigned int max_dist_other = (unsigned int)-1; | |
412 | ||
413 | /* | |
414 | * Find the mode with the closest image size. The distance between | |
415 | * image sizes is the size in pixels of the non-overlapping regions | |
416 | * between the requested size and the frame-specified size. | |
417 | * | |
418 | * Store both the closest mode that matches the requested format, and | |
419 | * the closest mode for all other formats. The best match is returned | |
420 | * if found, otherwise the best mode with a non-matching format is | |
421 | * returned. | |
422 | */ | |
423 | for (; *list; list++) { | |
424 | unsigned int dist; | |
425 | ||
426 | if ((*list)->type != ET8EK8_REGLIST_MODE) | |
427 | continue; | |
428 | ||
429 | et8ek8_reglist_to_mbus(*list, &format); | |
430 | ||
431 | dist = min(fmt->width, format.width) | |
432 | * min(fmt->height, format.height); | |
433 | dist = format.width * format.height | |
434 | + fmt->width * fmt->height - 2 * dist; | |
435 | ||
436 | ||
437 | if (fmt->code == format.code) { | |
438 | if (dist < max_dist_match || !best_match) { | |
439 | best_match = *list; | |
440 | max_dist_match = dist; | |
441 | } | |
442 | } else { | |
443 | if (dist < max_dist_other || !best_other) { | |
444 | best_other = *list; | |
445 | max_dist_other = dist; | |
446 | } | |
447 | } | |
448 | } | |
449 | ||
450 | return best_match ? best_match : best_other; | |
451 | } | |
452 | ||
453 | #define TIMEPERFRAME_AVG_FPS(t) \ | |
454 | (((t).denominator + ((t).numerator >> 1)) / (t).numerator) | |
455 | ||
456 | static struct et8ek8_reglist *et8ek8_reglist_find_mode_ival( | |
457 | struct et8ek8_meta_reglist *meta, | |
458 | struct et8ek8_reglist *current_reglist, | |
459 | struct v4l2_fract *timeperframe) | |
460 | { | |
461 | int fps = TIMEPERFRAME_AVG_FPS(*timeperframe); | |
462 | struct et8ek8_reglist **list = et8ek8_reglist_first(meta); | |
463 | struct et8ek8_mode *current_mode = ¤t_reglist->mode; | |
464 | ||
465 | for (; *list; list++) { | |
466 | struct et8ek8_mode *mode = &(*list)->mode; | |
467 | ||
468 | if ((*list)->type != ET8EK8_REGLIST_MODE) | |
469 | continue; | |
470 | ||
471 | if (mode->window_width != current_mode->window_width || | |
472 | mode->window_height != current_mode->window_height) | |
473 | continue; | |
474 | ||
475 | if (TIMEPERFRAME_AVG_FPS(mode->timeperframe) == fps) | |
476 | return *list; | |
477 | } | |
478 | ||
479 | return NULL; | |
480 | } | |
481 | ||
482 | static int et8ek8_reglist_cmp(const void *a, const void *b) | |
483 | { | |
484 | const struct et8ek8_reglist **list1 = (const struct et8ek8_reglist **)a, | |
485 | **list2 = (const struct et8ek8_reglist **)b; | |
486 | ||
487 | /* Put real modes in the beginning. */ | |
488 | if ((*list1)->type == ET8EK8_REGLIST_MODE && | |
489 | (*list2)->type != ET8EK8_REGLIST_MODE) | |
490 | return -1; | |
491 | if ((*list1)->type != ET8EK8_REGLIST_MODE && | |
492 | (*list2)->type == ET8EK8_REGLIST_MODE) | |
493 | return 1; | |
494 | ||
495 | /* Descending width. */ | |
496 | if ((*list1)->mode.window_width > (*list2)->mode.window_width) | |
497 | return -1; | |
498 | if ((*list1)->mode.window_width < (*list2)->mode.window_width) | |
499 | return 1; | |
500 | ||
501 | if ((*list1)->mode.window_height > (*list2)->mode.window_height) | |
502 | return -1; | |
503 | if ((*list1)->mode.window_height < (*list2)->mode.window_height) | |
504 | return 1; | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | static int et8ek8_reglist_import(struct i2c_client *client, | |
510 | struct et8ek8_meta_reglist *meta) | |
511 | { | |
512 | int nlists = 0, i; | |
513 | ||
514 | dev_info(&client->dev, "meta_reglist version %s\n", meta->version); | |
515 | ||
516 | while (meta->reglist[nlists].ptr) | |
517 | nlists++; | |
518 | ||
519 | if (!nlists) | |
520 | return -EINVAL; | |
521 | ||
522 | sort(&meta->reglist[0].ptr, nlists, sizeof(meta->reglist[0].ptr), | |
523 | et8ek8_reglist_cmp, NULL); | |
524 | ||
525 | i = nlists; | |
526 | nlists = 0; | |
527 | ||
528 | while (i--) { | |
529 | struct et8ek8_reglist *list; | |
530 | ||
531 | list = meta->reglist[nlists].ptr; | |
532 | ||
533 | dev_dbg(&client->dev, | |
534 | "%s: type %d\tw %d\th %d\tfmt %x\tival %d/%d\tptr %p\n", | |
535 | __func__, | |
536 | list->type, | |
537 | list->mode.window_width, list->mode.window_height, | |
538 | list->mode.bus_format, | |
539 | list->mode.timeperframe.numerator, | |
540 | list->mode.timeperframe.denominator, | |
541 | (void *)meta->reglist[nlists].ptr); | |
542 | ||
543 | nlists++; | |
544 | } | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | /* Called to change the V4L2 gain control value. This function | |
550 | * rounds and clamps the given value and updates the V4L2 control value. | |
551 | * If power is on, also updates the sensor analog and digital gains. | |
552 | * gain is in 0.1 EV (exposure value) units. | |
553 | */ | |
554 | static int et8ek8_set_gain(struct et8ek8_sensor *sensor, s32 gain) | |
555 | { | |
556 | struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); | |
557 | struct et8ek8_gain new; | |
558 | int r; | |
559 | ||
560 | new = et8ek8_gain_table[gain]; | |
561 | ||
562 | /* FIXME: optimise I2C writes! */ | |
563 | r = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, | |
564 | 0x124a, new.analog >> 8); | |
565 | if (r) | |
566 | return r; | |
567 | r = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, | |
568 | 0x1249, new.analog & 0xff); | |
569 | if (r) | |
570 | return r; | |
571 | ||
572 | r = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, | |
573 | 0x124d, new.digital >> 8); | |
574 | if (r) | |
575 | return r; | |
576 | r = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, | |
577 | 0x124c, new.digital & 0xff); | |
578 | ||
579 | return r; | |
580 | } | |
581 | ||
582 | static int et8ek8_set_test_pattern(struct et8ek8_sensor *sensor, s32 mode) | |
583 | { | |
584 | struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); | |
585 | int cbh_mode, cbv_mode, tp_mode, din_sw, r1420, rval; | |
586 | ||
587 | /* Values for normal mode */ | |
588 | cbh_mode = 0; | |
589 | cbv_mode = 0; | |
590 | tp_mode = 0; | |
591 | din_sw = 0x00; | |
592 | r1420 = 0xF0; | |
593 | ||
594 | if (mode) { | |
595 | /* Test pattern mode */ | |
596 | if (mode < 5) { | |
597 | cbh_mode = 1; | |
598 | cbv_mode = 1; | |
599 | tp_mode = mode + 3; | |
600 | } else { | |
601 | cbh_mode = 0; | |
602 | cbv_mode = 0; | |
603 | tp_mode = mode - 4 + 3; | |
604 | } | |
605 | ||
606 | din_sw = 0x01; | |
607 | r1420 = 0xE0; | |
608 | } | |
609 | ||
610 | rval = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x111B, | |
611 | tp_mode << 4); | |
612 | if (rval) | |
613 | return rval; | |
614 | ||
615 | rval = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x1121, | |
616 | cbh_mode << 7); | |
617 | if (rval) | |
618 | return rval; | |
619 | ||
620 | rval = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x1124, | |
621 | cbv_mode << 7); | |
622 | if (rval) | |
623 | return rval; | |
624 | ||
625 | rval = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x112C, din_sw); | |
626 | if (rval) | |
627 | return rval; | |
628 | ||
629 | return et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x1420, r1420); | |
630 | } | |
631 | ||
632 | /* ----------------------------------------------------------------------------- | |
633 | * V4L2 controls | |
634 | */ | |
635 | ||
636 | static int et8ek8_set_ctrl(struct v4l2_ctrl *ctrl) | |
637 | { | |
638 | struct et8ek8_sensor *sensor = | |
639 | container_of(ctrl->handler, struct et8ek8_sensor, ctrl_handler); | |
640 | ||
641 | switch (ctrl->id) { | |
642 | case V4L2_CID_GAIN: | |
643 | return et8ek8_set_gain(sensor, ctrl->val); | |
644 | ||
645 | case V4L2_CID_EXPOSURE: | |
646 | { | |
647 | struct i2c_client *client = | |
648 | v4l2_get_subdevdata(&sensor->subdev); | |
649 | ||
650 | return et8ek8_i2c_write_reg(client, ET8EK8_REG_16BIT, 0x1243, | |
651 | ctrl->val); | |
652 | } | |
653 | ||
654 | case V4L2_CID_TEST_PATTERN: | |
655 | return et8ek8_set_test_pattern(sensor, ctrl->val); | |
656 | ||
657 | case V4L2_CID_PIXEL_RATE: | |
658 | return 0; | |
659 | ||
660 | default: | |
661 | return -EINVAL; | |
662 | } | |
663 | } | |
664 | ||
665 | static const struct v4l2_ctrl_ops et8ek8_ctrl_ops = { | |
666 | .s_ctrl = et8ek8_set_ctrl, | |
667 | }; | |
668 | ||
669 | static const char * const et8ek8_test_pattern_menu[] = { | |
670 | "Normal", | |
671 | "Vertical colorbar", | |
672 | "Horizontal colorbar", | |
673 | "Scale", | |
674 | "Ramp", | |
675 | "Small vertical colorbar", | |
676 | "Small horizontal colorbar", | |
677 | "Small scale", | |
678 | "Small ramp", | |
679 | }; | |
680 | ||
681 | static int et8ek8_init_controls(struct et8ek8_sensor *sensor) | |
682 | { | |
683 | s32 max_rows; | |
684 | ||
685 | v4l2_ctrl_handler_init(&sensor->ctrl_handler, 4); | |
686 | ||
687 | /* V4L2_CID_GAIN */ | |
688 | v4l2_ctrl_new_std(&sensor->ctrl_handler, &et8ek8_ctrl_ops, | |
689 | V4L2_CID_GAIN, 0, ARRAY_SIZE(et8ek8_gain_table) - 1, | |
690 | 1, 0); | |
691 | ||
692 | max_rows = sensor->current_reglist->mode.max_exp; | |
693 | { | |
694 | u32 min = 1, max = max_rows; | |
695 | ||
696 | sensor->exposure = | |
697 | v4l2_ctrl_new_std(&sensor->ctrl_handler, | |
698 | &et8ek8_ctrl_ops, V4L2_CID_EXPOSURE, | |
699 | min, max, min, max); | |
700 | } | |
701 | ||
702 | /* V4L2_CID_PIXEL_RATE */ | |
703 | sensor->pixel_rate = | |
704 | v4l2_ctrl_new_std(&sensor->ctrl_handler, &et8ek8_ctrl_ops, | |
705 | V4L2_CID_PIXEL_RATE, 1, INT_MAX, 1, 1); | |
706 | ||
707 | /* V4L2_CID_TEST_PATTERN */ | |
708 | v4l2_ctrl_new_std_menu_items(&sensor->ctrl_handler, | |
709 | &et8ek8_ctrl_ops, V4L2_CID_TEST_PATTERN, | |
710 | ARRAY_SIZE(et8ek8_test_pattern_menu) - 1, | |
711 | 0, 0, et8ek8_test_pattern_menu); | |
712 | ||
713 | if (sensor->ctrl_handler.error) | |
714 | return sensor->ctrl_handler.error; | |
715 | ||
716 | sensor->subdev.ctrl_handler = &sensor->ctrl_handler; | |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
721 | static void et8ek8_update_controls(struct et8ek8_sensor *sensor) | |
722 | { | |
723 | struct v4l2_ctrl *ctrl; | |
724 | struct et8ek8_mode *mode = &sensor->current_reglist->mode; | |
725 | ||
726 | u32 min, max, pixel_rate; | |
727 | static const int S = 8; | |
728 | ||
729 | ctrl = sensor->exposure; | |
730 | ||
731 | min = 1; | |
732 | max = mode->max_exp; | |
733 | ||
734 | /* | |
735 | * Calculate average pixel clock per line. Assume buffers can spread | |
736 | * the data over horizontal blanking time. Rounding upwards. | |
737 | * Formula taken from stock Nokia N900 kernel. | |
738 | */ | |
739 | pixel_rate = ((mode->pixel_clock + (1 << S) - 1) >> S) + mode->width; | |
740 | pixel_rate = mode->window_width * (pixel_rate - 1) / mode->width; | |
741 | ||
742 | __v4l2_ctrl_modify_range(ctrl, min, max, min, max); | |
743 | __v4l2_ctrl_s_ctrl_int64(sensor->pixel_rate, pixel_rate << S); | |
744 | } | |
745 | ||
746 | static int et8ek8_configure(struct et8ek8_sensor *sensor) | |
747 | { | |
748 | struct v4l2_subdev *subdev = &sensor->subdev; | |
749 | struct i2c_client *client = v4l2_get_subdevdata(subdev); | |
750 | int rval; | |
751 | ||
752 | rval = et8ek8_i2c_write_regs(client, sensor->current_reglist->regs); | |
753 | if (rval) | |
754 | goto fail; | |
755 | ||
756 | /* Controls set while the power to the sensor is turned off are saved | |
757 | * but not applied to the hardware. Now that we're about to start | |
758 | * streaming apply all the current values to the hardware. | |
759 | */ | |
760 | rval = v4l2_ctrl_handler_setup(&sensor->ctrl_handler); | |
761 | if (rval) | |
762 | goto fail; | |
763 | ||
764 | return 0; | |
765 | ||
766 | fail: | |
767 | dev_err(&client->dev, "sensor configuration failed\n"); | |
768 | ||
769 | return rval; | |
770 | } | |
771 | ||
772 | static int et8ek8_stream_on(struct et8ek8_sensor *sensor) | |
773 | { | |
774 | struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); | |
775 | ||
776 | return et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x1252, 0xb0); | |
777 | } | |
778 | ||
779 | static int et8ek8_stream_off(struct et8ek8_sensor *sensor) | |
780 | { | |
781 | struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); | |
782 | ||
783 | return et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x1252, 0x30); | |
784 | } | |
785 | ||
786 | static int et8ek8_s_stream(struct v4l2_subdev *subdev, int streaming) | |
787 | { | |
788 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); | |
789 | int ret; | |
790 | ||
791 | if (!streaming) | |
792 | return et8ek8_stream_off(sensor); | |
793 | ||
794 | ret = et8ek8_configure(sensor); | |
795 | if (ret < 0) | |
796 | return ret; | |
797 | ||
798 | return et8ek8_stream_on(sensor); | |
799 | } | |
800 | ||
801 | /* -------------------------------------------------------------------------- | |
802 | * V4L2 subdev operations | |
803 | */ | |
804 | ||
805 | static int et8ek8_power_off(struct et8ek8_sensor *sensor) | |
806 | { | |
807 | gpiod_set_value(sensor->reset, 0); | |
808 | udelay(1); | |
809 | ||
810 | clk_disable_unprepare(sensor->ext_clk); | |
811 | ||
812 | return regulator_disable(sensor->vana); | |
813 | } | |
814 | ||
815 | static int et8ek8_power_on(struct et8ek8_sensor *sensor) | |
816 | { | |
817 | struct v4l2_subdev *subdev = &sensor->subdev; | |
818 | struct i2c_client *client = v4l2_get_subdevdata(subdev); | |
819 | unsigned int xclk_freq; | |
820 | int val, rval; | |
821 | ||
822 | rval = regulator_enable(sensor->vana); | |
823 | if (rval) { | |
824 | dev_err(&client->dev, "failed to enable vana regulator\n"); | |
825 | return rval; | |
826 | } | |
827 | ||
828 | if (sensor->current_reglist) | |
829 | xclk_freq = sensor->current_reglist->mode.ext_clock; | |
830 | else | |
831 | xclk_freq = sensor->xclk_freq; | |
832 | ||
833 | rval = clk_set_rate(sensor->ext_clk, xclk_freq); | |
834 | if (rval < 0) { | |
835 | dev_err(&client->dev, "unable to set extclk clock freq to %u\n", | |
836 | xclk_freq); | |
837 | goto out; | |
838 | } | |
839 | rval = clk_prepare_enable(sensor->ext_clk); | |
840 | if (rval < 0) { | |
841 | dev_err(&client->dev, "failed to enable extclk\n"); | |
842 | goto out; | |
843 | } | |
844 | ||
845 | if (rval) | |
846 | goto out; | |
847 | ||
848 | udelay(10); /* I wish this is a good value */ | |
849 | ||
850 | gpiod_set_value(sensor->reset, 1); | |
851 | ||
852 | msleep(5000 * 1000 / xclk_freq + 1); /* Wait 5000 cycles */ | |
853 | ||
854 | rval = et8ek8_i2c_reglist_find_write(client, &meta_reglist, | |
855 | ET8EK8_REGLIST_POWERON); | |
856 | if (rval) | |
857 | goto out; | |
858 | ||
859 | #ifdef USE_CRC | |
860 | rval = et8ek8_i2c_read_reg(client, ET8EK8_REG_8BIT, 0x1263, &val); | |
861 | if (rval) | |
862 | goto out; | |
863 | #if USE_CRC /* TODO get crc setting from DT */ | |
864 | val |= BIT(4); | |
865 | #else | |
866 | val &= ~BIT(4); | |
867 | #endif | |
868 | rval = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x1263, val); | |
869 | if (rval) | |
870 | goto out; | |
871 | #endif | |
872 | ||
873 | out: | |
874 | if (rval) | |
875 | et8ek8_power_off(sensor); | |
876 | ||
877 | return rval; | |
878 | } | |
879 | ||
880 | /* -------------------------------------------------------------------------- | |
881 | * V4L2 subdev video operations | |
882 | */ | |
883 | #define MAX_FMTS 4 | |
884 | static int et8ek8_enum_mbus_code(struct v4l2_subdev *subdev, | |
885 | struct v4l2_subdev_pad_config *cfg, | |
886 | struct v4l2_subdev_mbus_code_enum *code) | |
887 | { | |
888 | struct et8ek8_reglist **list = | |
889 | et8ek8_reglist_first(&meta_reglist); | |
890 | u32 pixelformat[MAX_FMTS]; | |
891 | int npixelformat = 0; | |
892 | ||
893 | if (code->index >= MAX_FMTS) | |
894 | return -EINVAL; | |
895 | ||
896 | for (; *list; list++) { | |
897 | struct et8ek8_mode *mode = &(*list)->mode; | |
898 | int i; | |
899 | ||
900 | if ((*list)->type != ET8EK8_REGLIST_MODE) | |
901 | continue; | |
902 | ||
903 | for (i = 0; i < npixelformat; i++) { | |
904 | if (pixelformat[i] == mode->bus_format) | |
905 | break; | |
906 | } | |
907 | if (i != npixelformat) | |
908 | continue; | |
909 | ||
910 | if (code->index == npixelformat) { | |
911 | code->code = mode->bus_format; | |
912 | return 0; | |
913 | } | |
914 | ||
915 | pixelformat[npixelformat] = mode->bus_format; | |
916 | npixelformat++; | |
917 | } | |
918 | ||
919 | return -EINVAL; | |
920 | } | |
921 | ||
922 | static int et8ek8_enum_frame_size(struct v4l2_subdev *subdev, | |
923 | struct v4l2_subdev_pad_config *cfg, | |
924 | struct v4l2_subdev_frame_size_enum *fse) | |
925 | { | |
926 | struct et8ek8_reglist **list = | |
927 | et8ek8_reglist_first(&meta_reglist); | |
928 | struct v4l2_mbus_framefmt format; | |
929 | int cmp_width = INT_MAX; | |
930 | int cmp_height = INT_MAX; | |
931 | int index = fse->index; | |
932 | ||
933 | for (; *list; list++) { | |
934 | if ((*list)->type != ET8EK8_REGLIST_MODE) | |
935 | continue; | |
936 | ||
937 | et8ek8_reglist_to_mbus(*list, &format); | |
938 | if (fse->code != format.code) | |
939 | continue; | |
940 | ||
941 | /* Assume that the modes are grouped by frame size. */ | |
942 | if (format.width == cmp_width && format.height == cmp_height) | |
943 | continue; | |
944 | ||
945 | cmp_width = format.width; | |
946 | cmp_height = format.height; | |
947 | ||
948 | if (index-- == 0) { | |
949 | fse->min_width = format.width; | |
950 | fse->min_height = format.height; | |
951 | fse->max_width = format.width; | |
952 | fse->max_height = format.height; | |
953 | return 0; | |
954 | } | |
955 | } | |
956 | ||
957 | return -EINVAL; | |
958 | } | |
959 | ||
960 | static int et8ek8_enum_frame_ival(struct v4l2_subdev *subdev, | |
961 | struct v4l2_subdev_pad_config *cfg, | |
962 | struct v4l2_subdev_frame_interval_enum *fie) | |
963 | { | |
964 | struct et8ek8_reglist **list = | |
965 | et8ek8_reglist_first(&meta_reglist); | |
966 | struct v4l2_mbus_framefmt format; | |
967 | int index = fie->index; | |
968 | ||
969 | for (; *list; list++) { | |
970 | struct et8ek8_mode *mode = &(*list)->mode; | |
971 | ||
972 | if ((*list)->type != ET8EK8_REGLIST_MODE) | |
973 | continue; | |
974 | ||
975 | et8ek8_reglist_to_mbus(*list, &format); | |
976 | if (fie->code != format.code) | |
977 | continue; | |
978 | ||
979 | if (fie->width != format.width || fie->height != format.height) | |
980 | continue; | |
981 | ||
982 | if (index-- == 0) { | |
983 | fie->interval = mode->timeperframe; | |
984 | return 0; | |
985 | } | |
986 | } | |
987 | ||
988 | return -EINVAL; | |
989 | } | |
990 | ||
991 | static struct v4l2_mbus_framefmt * | |
992 | __et8ek8_get_pad_format(struct et8ek8_sensor *sensor, | |
993 | struct v4l2_subdev_pad_config *cfg, | |
994 | unsigned int pad, enum v4l2_subdev_format_whence which) | |
995 | { | |
996 | switch (which) { | |
997 | case V4L2_SUBDEV_FORMAT_TRY: | |
998 | return v4l2_subdev_get_try_format(&sensor->subdev, cfg, pad); | |
999 | case V4L2_SUBDEV_FORMAT_ACTIVE: | |
1000 | return &sensor->format; | |
1001 | default: | |
1002 | return NULL; | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | static int et8ek8_get_pad_format(struct v4l2_subdev *subdev, | |
1007 | struct v4l2_subdev_pad_config *cfg, | |
1008 | struct v4l2_subdev_format *fmt) | |
1009 | { | |
1010 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); | |
1011 | struct v4l2_mbus_framefmt *format; | |
1012 | ||
1013 | format = __et8ek8_get_pad_format(sensor, cfg, fmt->pad, fmt->which); | |
1014 | if (!format) | |
1015 | return -EINVAL; | |
1016 | ||
1017 | fmt->format = *format; | |
1018 | ||
1019 | return 0; | |
1020 | } | |
1021 | ||
1022 | static int et8ek8_set_pad_format(struct v4l2_subdev *subdev, | |
1023 | struct v4l2_subdev_pad_config *cfg, | |
1024 | struct v4l2_subdev_format *fmt) | |
1025 | { | |
1026 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); | |
1027 | struct v4l2_mbus_framefmt *format; | |
1028 | struct et8ek8_reglist *reglist; | |
1029 | ||
1030 | format = __et8ek8_get_pad_format(sensor, cfg, fmt->pad, fmt->which); | |
1031 | if (!format) | |
1032 | return -EINVAL; | |
1033 | ||
1034 | reglist = et8ek8_reglist_find_mode_fmt(&meta_reglist, &fmt->format); | |
1035 | et8ek8_reglist_to_mbus(reglist, &fmt->format); | |
1036 | *format = fmt->format; | |
1037 | ||
1038 | if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { | |
1039 | sensor->current_reglist = reglist; | |
1040 | et8ek8_update_controls(sensor); | |
1041 | } | |
1042 | ||
1043 | return 0; | |
1044 | } | |
1045 | ||
1046 | static int et8ek8_get_frame_interval(struct v4l2_subdev *subdev, | |
1047 | struct v4l2_subdev_frame_interval *fi) | |
1048 | { | |
1049 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); | |
1050 | ||
1051 | memset(fi, 0, sizeof(*fi)); | |
1052 | fi->interval = sensor->current_reglist->mode.timeperframe; | |
1053 | ||
1054 | return 0; | |
1055 | } | |
1056 | ||
1057 | static int et8ek8_set_frame_interval(struct v4l2_subdev *subdev, | |
1058 | struct v4l2_subdev_frame_interval *fi) | |
1059 | { | |
1060 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); | |
1061 | struct et8ek8_reglist *reglist; | |
1062 | ||
1063 | reglist = et8ek8_reglist_find_mode_ival(&meta_reglist, | |
1064 | sensor->current_reglist, | |
1065 | &fi->interval); | |
1066 | ||
1067 | if (!reglist) | |
1068 | return -EINVAL; | |
1069 | ||
1070 | if (sensor->current_reglist->mode.ext_clock != reglist->mode.ext_clock) | |
1071 | return -EINVAL; | |
1072 | ||
1073 | sensor->current_reglist = reglist; | |
1074 | et8ek8_update_controls(sensor); | |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | static int et8ek8_g_priv_mem(struct v4l2_subdev *subdev) | |
1080 | { | |
1081 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); | |
1082 | struct i2c_client *client = v4l2_get_subdevdata(subdev); | |
1083 | unsigned int length = ET8EK8_PRIV_MEM_SIZE; | |
1084 | unsigned int offset = 0; | |
1085 | u8 *ptr = sensor->priv_mem; | |
1086 | int rval = 0; | |
1087 | ||
1088 | /* Read the EEPROM window-by-window, each window 8 bytes */ | |
1089 | do { | |
1090 | u8 buffer[PRIV_MEM_WIN_SIZE]; | |
1091 | struct i2c_msg msg; | |
1092 | int bytes, i; | |
1093 | int ofs; | |
1094 | ||
1095 | /* Set the current window */ | |
1096 | rval = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x0001, | |
1097 | 0xe0 | (offset >> 3)); | |
1098 | if (rval < 0) | |
1099 | return rval; | |
1100 | ||
1101 | /* Wait for status bit */ | |
1102 | for (i = 0; i < 1000; ++i) { | |
1103 | u32 status; | |
1104 | ||
1105 | rval = et8ek8_i2c_read_reg(client, ET8EK8_REG_8BIT, | |
1106 | 0x0003, &status); | |
1107 | if (rval < 0) | |
1108 | return rval; | |
1109 | if (!(status & 0x08)) | |
1110 | break; | |
1111 | usleep_range(1000, 2000); | |
26db4d39 | 1112 | } |
c5254e72 PM |
1113 | |
1114 | if (i == 1000) | |
1115 | return -EIO; | |
1116 | ||
1117 | /* Read window, 8 bytes at once, and copy to user space */ | |
1118 | ofs = offset & 0x07; /* Offset within this window */ | |
1119 | bytes = length + ofs > 8 ? 8-ofs : length; | |
1120 | msg.addr = client->addr; | |
1121 | msg.flags = 0; | |
1122 | msg.len = 2; | |
1123 | msg.buf = buffer; | |
1124 | ofs += PRIV_MEM_START_REG; | |
1125 | buffer[0] = (u8)(ofs >> 8); | |
1126 | buffer[1] = (u8)(ofs & 0xFF); | |
1127 | ||
1128 | rval = i2c_transfer(client->adapter, &msg, 1); | |
1129 | if (rval < 0) | |
1130 | return rval; | |
1131 | ||
1132 | mdelay(ET8EK8_I2C_DELAY); | |
1133 | msg.addr = client->addr; | |
1134 | msg.len = bytes; | |
1135 | msg.flags = I2C_M_RD; | |
1136 | msg.buf = buffer; | |
1137 | memset(buffer, 0, sizeof(buffer)); | |
1138 | ||
1139 | rval = i2c_transfer(client->adapter, &msg, 1); | |
1140 | if (rval < 0) | |
1141 | return rval; | |
1142 | ||
1143 | rval = 0; | |
1144 | memcpy(ptr, buffer, bytes); | |
1145 | ||
1146 | length -= bytes; | |
1147 | offset += bytes; | |
1148 | ptr += bytes; | |
1149 | } while (length > 0); | |
1150 | ||
1151 | return rval; | |
1152 | } | |
1153 | ||
1154 | static int et8ek8_dev_init(struct v4l2_subdev *subdev) | |
1155 | { | |
1156 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); | |
1157 | struct i2c_client *client = v4l2_get_subdevdata(subdev); | |
1158 | int rval, rev_l, rev_h; | |
1159 | ||
1160 | rval = et8ek8_power_on(sensor); | |
1161 | if (rval) { | |
1162 | dev_err(&client->dev, "could not power on\n"); | |
1163 | return rval; | |
1164 | } | |
1165 | ||
1166 | rval = et8ek8_i2c_read_reg(client, ET8EK8_REG_8BIT, | |
1167 | REG_REVISION_NUMBER_L, &rev_l); | |
1168 | if (!rval) | |
1169 | rval = et8ek8_i2c_read_reg(client, ET8EK8_REG_8BIT, | |
1170 | REG_REVISION_NUMBER_H, &rev_h); | |
1171 | if (rval) { | |
1172 | dev_err(&client->dev, "no et8ek8 sensor detected\n"); | |
1173 | goto out_poweroff; | |
1174 | } | |
1175 | ||
1176 | sensor->version = (rev_h << 8) + rev_l; | |
1177 | if (sensor->version != ET8EK8_REV_1 && sensor->version != ET8EK8_REV_2) | |
1178 | dev_info(&client->dev, | |
1179 | "unknown version 0x%x detected, continuing anyway\n", | |
1180 | sensor->version); | |
1181 | ||
1182 | rval = et8ek8_reglist_import(client, &meta_reglist); | |
1183 | if (rval) { | |
1184 | dev_err(&client->dev, | |
1185 | "invalid register list %s, import failed\n", | |
1186 | ET8EK8_NAME); | |
1187 | goto out_poweroff; | |
1188 | } | |
1189 | ||
1190 | sensor->current_reglist = et8ek8_reglist_find_type(&meta_reglist, | |
1191 | ET8EK8_REGLIST_MODE); | |
1192 | if (!sensor->current_reglist) { | |
1193 | dev_err(&client->dev, | |
1194 | "invalid register list %s, no mode found\n", | |
1195 | ET8EK8_NAME); | |
1196 | rval = -ENODEV; | |
1197 | goto out_poweroff; | |
1198 | } | |
1199 | ||
1200 | et8ek8_reglist_to_mbus(sensor->current_reglist, &sensor->format); | |
1201 | ||
1202 | rval = et8ek8_i2c_reglist_find_write(client, &meta_reglist, | |
1203 | ET8EK8_REGLIST_POWERON); | |
1204 | if (rval) { | |
1205 | dev_err(&client->dev, | |
1206 | "invalid register list %s, no POWERON mode found\n", | |
1207 | ET8EK8_NAME); | |
1208 | goto out_poweroff; | |
1209 | } | |
1210 | rval = et8ek8_stream_on(sensor); /* Needed to be able to read EEPROM */ | |
1211 | if (rval) | |
1212 | goto out_poweroff; | |
1213 | rval = et8ek8_g_priv_mem(subdev); | |
1214 | if (rval) | |
1215 | dev_warn(&client->dev, | |
1216 | "can not read OTP (EEPROM) memory from sensor\n"); | |
1217 | rval = et8ek8_stream_off(sensor); | |
1218 | if (rval) | |
1219 | goto out_poweroff; | |
1220 | ||
1221 | rval = et8ek8_power_off(sensor); | |
1222 | if (rval) | |
1223 | goto out_poweroff; | |
1224 | ||
1225 | return 0; | |
1226 | ||
1227 | out_poweroff: | |
1228 | et8ek8_power_off(sensor); | |
1229 | ||
1230 | return rval; | |
1231 | } | |
1232 | ||
1233 | /* -------------------------------------------------------------------------- | |
1234 | * sysfs attributes | |
1235 | */ | |
1236 | static ssize_t | |
1237 | et8ek8_priv_mem_read(struct device *dev, struct device_attribute *attr, | |
1238 | char *buf) | |
1239 | { | |
1240 | struct v4l2_subdev *subdev = i2c_get_clientdata(to_i2c_client(dev)); | |
1241 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); | |
1242 | ||
1243 | #if PAGE_SIZE < ET8EK8_PRIV_MEM_SIZE | |
1244 | #error PAGE_SIZE too small! | |
1245 | #endif | |
1246 | ||
1247 | memcpy(buf, sensor->priv_mem, ET8EK8_PRIV_MEM_SIZE); | |
1248 | ||
1249 | return ET8EK8_PRIV_MEM_SIZE; | |
1250 | } | |
1251 | static DEVICE_ATTR(priv_mem, 0444, et8ek8_priv_mem_read, NULL); | |
1252 | ||
1253 | /* -------------------------------------------------------------------------- | |
1254 | * V4L2 subdev core operations | |
1255 | */ | |
1256 | ||
1257 | static int | |
1258 | et8ek8_registered(struct v4l2_subdev *subdev) | |
1259 | { | |
1260 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); | |
1261 | struct i2c_client *client = v4l2_get_subdevdata(subdev); | |
c5254e72 PM |
1262 | int rval; |
1263 | ||
1264 | dev_dbg(&client->dev, "registered!"); | |
1265 | ||
1266 | rval = device_create_file(&client->dev, &dev_attr_priv_mem); | |
1267 | if (rval) { | |
1268 | dev_err(&client->dev, "could not register sysfs entry\n"); | |
1269 | return rval; | |
1270 | } | |
1271 | ||
1272 | rval = et8ek8_dev_init(subdev); | |
1273 | if (rval) | |
1274 | goto err_file; | |
1275 | ||
1276 | rval = et8ek8_init_controls(sensor); | |
1277 | if (rval) { | |
1278 | dev_err(&client->dev, "controls initialization failed\n"); | |
1279 | goto err_file; | |
1280 | } | |
1281 | ||
bed6838f SA |
1282 | __et8ek8_get_pad_format(sensor, NULL, 0, V4L2_SUBDEV_FORMAT_ACTIVE); |
1283 | ||
c5254e72 PM |
1284 | return 0; |
1285 | ||
1286 | err_file: | |
1287 | device_remove_file(&client->dev, &dev_attr_priv_mem); | |
1288 | ||
1289 | return rval; | |
1290 | } | |
1291 | ||
1292 | static int __et8ek8_set_power(struct et8ek8_sensor *sensor, bool on) | |
1293 | { | |
1294 | return on ? et8ek8_power_on(sensor) : et8ek8_power_off(sensor); | |
1295 | } | |
1296 | ||
1297 | static int et8ek8_set_power(struct v4l2_subdev *subdev, int on) | |
1298 | { | |
1299 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); | |
1300 | int ret = 0; | |
1301 | ||
1302 | mutex_lock(&sensor->power_lock); | |
1303 | ||
1304 | /* If the power count is modified from 0 to != 0 or from != 0 to 0, | |
1305 | * update the power state. | |
1306 | */ | |
1307 | if (sensor->power_count == !on) { | |
1308 | ret = __et8ek8_set_power(sensor, !!on); | |
1309 | if (ret < 0) | |
1310 | goto done; | |
1311 | } | |
1312 | ||
1313 | /* Update the power count. */ | |
1314 | sensor->power_count += on ? 1 : -1; | |
1315 | WARN_ON(sensor->power_count < 0); | |
1316 | ||
1317 | done: | |
1318 | mutex_unlock(&sensor->power_lock); | |
1319 | ||
1320 | return ret; | |
1321 | } | |
1322 | ||
1323 | static int et8ek8_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) | |
1324 | { | |
1325 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(sd); | |
1326 | struct v4l2_mbus_framefmt *format; | |
1327 | struct et8ek8_reglist *reglist; | |
1328 | ||
1329 | reglist = et8ek8_reglist_find_type(&meta_reglist, ET8EK8_REGLIST_MODE); | |
1330 | format = __et8ek8_get_pad_format(sensor, fh->pad, 0, | |
1331 | V4L2_SUBDEV_FORMAT_TRY); | |
1332 | et8ek8_reglist_to_mbus(reglist, format); | |
1333 | ||
1334 | return et8ek8_set_power(sd, true); | |
1335 | } | |
1336 | ||
1337 | static int et8ek8_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) | |
1338 | { | |
1339 | return et8ek8_set_power(sd, false); | |
1340 | } | |
1341 | ||
1342 | static const struct v4l2_subdev_video_ops et8ek8_video_ops = { | |
1343 | .s_stream = et8ek8_s_stream, | |
1344 | .g_frame_interval = et8ek8_get_frame_interval, | |
1345 | .s_frame_interval = et8ek8_set_frame_interval, | |
1346 | }; | |
1347 | ||
1348 | static const struct v4l2_subdev_core_ops et8ek8_core_ops = { | |
1349 | .s_power = et8ek8_set_power, | |
1350 | }; | |
1351 | ||
1352 | static const struct v4l2_subdev_pad_ops et8ek8_pad_ops = { | |
1353 | .enum_mbus_code = et8ek8_enum_mbus_code, | |
1354 | .enum_frame_size = et8ek8_enum_frame_size, | |
1355 | .enum_frame_interval = et8ek8_enum_frame_ival, | |
1356 | .get_fmt = et8ek8_get_pad_format, | |
1357 | .set_fmt = et8ek8_set_pad_format, | |
1358 | }; | |
1359 | ||
1360 | static const struct v4l2_subdev_ops et8ek8_ops = { | |
1361 | .core = &et8ek8_core_ops, | |
1362 | .video = &et8ek8_video_ops, | |
1363 | .pad = &et8ek8_pad_ops, | |
1364 | }; | |
1365 | ||
1366 | static const struct v4l2_subdev_internal_ops et8ek8_internal_ops = { | |
1367 | .registered = et8ek8_registered, | |
1368 | .open = et8ek8_open, | |
1369 | .close = et8ek8_close, | |
1370 | }; | |
1371 | ||
1372 | /* -------------------------------------------------------------------------- | |
1373 | * I2C driver | |
1374 | */ | |
1375 | static int __maybe_unused et8ek8_suspend(struct device *dev) | |
1376 | { | |
1377 | struct i2c_client *client = to_i2c_client(dev); | |
1378 | struct v4l2_subdev *subdev = i2c_get_clientdata(client); | |
1379 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); | |
1380 | ||
1381 | if (!sensor->power_count) | |
1382 | return 0; | |
1383 | ||
1384 | return __et8ek8_set_power(sensor, false); | |
1385 | } | |
1386 | ||
1387 | static int __maybe_unused et8ek8_resume(struct device *dev) | |
1388 | { | |
1389 | struct i2c_client *client = to_i2c_client(dev); | |
1390 | struct v4l2_subdev *subdev = i2c_get_clientdata(client); | |
1391 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); | |
1392 | ||
1393 | if (!sensor->power_count) | |
1394 | return 0; | |
1395 | ||
1396 | return __et8ek8_set_power(sensor, true); | |
1397 | } | |
1398 | ||
1399 | static int et8ek8_probe(struct i2c_client *client, | |
1400 | const struct i2c_device_id *devid) | |
1401 | { | |
1402 | struct et8ek8_sensor *sensor; | |
1403 | struct device *dev = &client->dev; | |
1404 | int ret; | |
1405 | ||
1406 | sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL); | |
1407 | if (!sensor) | |
1408 | return -ENOMEM; | |
1409 | ||
1410 | sensor->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); | |
1411 | if (IS_ERR(sensor->reset)) { | |
1412 | dev_dbg(&client->dev, "could not request reset gpio\n"); | |
1413 | return PTR_ERR(sensor->reset); | |
1414 | } | |
1415 | ||
1416 | sensor->vana = devm_regulator_get(dev, "vana"); | |
1417 | if (IS_ERR(sensor->vana)) { | |
1418 | dev_err(&client->dev, "could not get regulator for vana\n"); | |
1419 | return PTR_ERR(sensor->vana); | |
1420 | } | |
1421 | ||
1422 | sensor->ext_clk = devm_clk_get(dev, NULL); | |
1423 | if (IS_ERR(sensor->ext_clk)) { | |
1424 | dev_err(&client->dev, "could not get clock\n"); | |
1425 | return PTR_ERR(sensor->ext_clk); | |
1426 | } | |
1427 | ||
1428 | ret = of_property_read_u32(dev->of_node, "clock-frequency", | |
1429 | &sensor->xclk_freq); | |
1430 | if (ret) { | |
1431 | dev_warn(dev, "can't get clock-frequency\n"); | |
1432 | return ret; | |
1433 | } | |
1434 | ||
1435 | mutex_init(&sensor->power_lock); | |
1436 | ||
1437 | v4l2_i2c_subdev_init(&sensor->subdev, client, &et8ek8_ops); | |
1438 | sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; | |
1439 | sensor->subdev.internal_ops = &et8ek8_internal_ops; | |
1440 | ||
1441 | sensor->pad.flags = MEDIA_PAD_FL_SOURCE; | |
1442 | ret = media_entity_pads_init(&sensor->subdev.entity, 1, &sensor->pad); | |
1443 | if (ret < 0) { | |
1444 | dev_err(&client->dev, "media entity init failed!\n"); | |
1445 | goto err_mutex; | |
1446 | } | |
1447 | ||
1448 | ret = v4l2_async_register_subdev(&sensor->subdev); | |
1449 | if (ret < 0) | |
1450 | goto err_entity; | |
1451 | ||
1452 | dev_dbg(dev, "initialized!\n"); | |
1453 | ||
1454 | return 0; | |
1455 | ||
1456 | err_entity: | |
1457 | media_entity_cleanup(&sensor->subdev.entity); | |
1458 | err_mutex: | |
1459 | mutex_destroy(&sensor->power_lock); | |
1460 | return ret; | |
1461 | } | |
1462 | ||
1463 | static int __exit et8ek8_remove(struct i2c_client *client) | |
1464 | { | |
1465 | struct v4l2_subdev *subdev = i2c_get_clientdata(client); | |
1466 | struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); | |
1467 | ||
1468 | if (sensor->power_count) { | |
1469 | WARN_ON(1); | |
1470 | et8ek8_power_off(sensor); | |
1471 | sensor->power_count = 0; | |
1472 | } | |
1473 | ||
1474 | v4l2_device_unregister_subdev(&sensor->subdev); | |
1475 | device_remove_file(&client->dev, &dev_attr_priv_mem); | |
1476 | v4l2_ctrl_handler_free(&sensor->ctrl_handler); | |
1477 | v4l2_async_unregister_subdev(&sensor->subdev); | |
1478 | media_entity_cleanup(&sensor->subdev.entity); | |
1479 | mutex_destroy(&sensor->power_lock); | |
1480 | ||
1481 | return 0; | |
1482 | } | |
1483 | ||
1484 | static const struct of_device_id et8ek8_of_table[] = { | |
1485 | { .compatible = "toshiba,et8ek8" }, | |
1486 | { }, | |
1487 | }; | |
5ace6934 | 1488 | MODULE_DEVICE_TABLE(of, et8ek8_of_table); |
c5254e72 PM |
1489 | |
1490 | static const struct i2c_device_id et8ek8_id_table[] = { | |
1491 | { ET8EK8_NAME, 0 }, | |
1492 | { } | |
1493 | }; | |
1494 | MODULE_DEVICE_TABLE(i2c, et8ek8_id_table); | |
1495 | ||
1496 | static const struct dev_pm_ops et8ek8_pm_ops = { | |
1497 | SET_SYSTEM_SLEEP_PM_OPS(et8ek8_suspend, et8ek8_resume) | |
1498 | }; | |
1499 | ||
1500 | static struct i2c_driver et8ek8_i2c_driver = { | |
1501 | .driver = { | |
1502 | .name = ET8EK8_NAME, | |
1503 | .pm = &et8ek8_pm_ops, | |
1504 | .of_match_table = et8ek8_of_table, | |
1505 | }, | |
1506 | .probe = et8ek8_probe, | |
1507 | .remove = __exit_p(et8ek8_remove), | |
1508 | .id_table = et8ek8_id_table, | |
1509 | }; | |
1510 | ||
1511 | module_i2c_driver(et8ek8_i2c_driver); | |
1512 | ||
1513 | MODULE_AUTHOR("Sakari Ailus <sakari.ailus@iki.fi>, Pavel Machek <pavel@ucw.cz"); | |
1514 | MODULE_DESCRIPTION("Toshiba ET8EK8 camera sensor driver"); | |
1515 | MODULE_LICENSE("GPL"); |