]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - drivers/staging/media/atomisp/i2c/atomisp-gc2235.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
media: staging: atomisp: Use module_i2c_driver() macro
[mirror_ubuntu-bionic-kernel.git] / drivers / staging / media / atomisp / i2c / atomisp-gc2235.c
CommitLineData
a49d2536
AC		 1/*
2 * Support for GalaxyCore GC2235 2M camera sensor.
3 *
4 * Copyright (c) 2014 Intel Corporation. All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version
8 * 2 as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
a49d2536
AC		 15 */
16
17#include <linux/module.h>
18#include <linux/types.h>
19#include <linux/kernel.h>
20#include <linux/mm.h>
21#include <linux/string.h>
22#include <linux/errno.h>
23#include <linux/init.h>
24#include <linux/kmod.h>
25#include <linux/device.h>
26#include <linux/delay.h>
27#include <linux/slab.h>
28#include <linux/i2c.h>
29#include <linux/gpio.h>
30#include <linux/moduleparam.h>
31#include <media/v4l2-device.h>
25016567 32#include "../include/linux/atomisp_gmin_platform.h"
a49d2536
AC		 33#include <linux/acpi.h>
34#include <linux/io.h>
35
36#include "gc2235.h"
37
38/* i2c read/write stuff */
39static int gc2235_read_reg(struct i2c_client *client,
40 u16 data_length, u16 reg, u16 *val)
41{
42 int err;
43 struct i2c_msg msg[2];
44 unsigned char data[6];
45
46 if (!client->adapter) {
47 dev_err(&client->dev, "%s error, no client->adapter\n",
48 __func__);
49 return -ENODEV;
50 }
51
52 if (data_length != GC2235_8BIT) {
53 dev_err(&client->dev, "%s error, invalid data length\n",
54 __func__);
55 return -EINVAL;
56 }
57
478f4f40 58 memset(msg, 0, sizeof(msg));
a49d2536
AC		 59
60 msg[0].addr = client->addr;
61 msg[0].flags = 0;
62 msg[0].len = 1;
63 msg[0].buf = data;
64
65 /* high byte goes out first */
66 data[0] = (u8)(reg & 0xff);
67
68 msg[1].addr = client->addr;
69 msg[1].len = data_length;
70 msg[1].flags = I2C_M_RD;
71 msg[1].buf = data;
72
73 err = i2c_transfer(client->adapter, msg, 2);
74 if (err != 2) {
75 if (err >= 0)
76 err = -EIO;
77 dev_err(&client->dev,
78 "read from offset 0x%x error %d", reg, err);
79 return err;
80 }
81
82 *val = 0;
83 /* high byte comes first */
84 if (data_length == GC2235_8BIT)
85 *val = (u8)data[0];
86
87 return 0;
88}
89
90static int gc2235_i2c_write(struct i2c_client *client, u16 len, u8 *data)
91{
92 struct i2c_msg msg;
93 const int num_msg = 1;
94 int ret;
95
96 msg.addr = client->addr;
97 msg.flags = 0;
98 msg.len = len;
99 msg.buf = data;
100 ret = i2c_transfer(client->adapter, &msg, 1);
101
102 return ret == num_msg ? 0 : -EIO;
103}
104
105static int gc2235_write_reg(struct i2c_client *client, u16 data_length,
106 u8 reg, u8 val)
107{
108 int ret;
109 unsigned char data[4] = {0};
110 const u16 len = data_length + sizeof(u8); /* 16-bit address + data */
111
112 if (data_length != GC2235_8BIT) {
113 dev_err(&client->dev,
114 "%s error, invalid data_length\n", __func__);
115 return -EINVAL;
116 }
117
118 /* high byte goes out first */
119 data[0] = reg;
120 data[1] = val;
121
122 ret = gc2235_i2c_write(client, len, data);
123 if (ret)
124 dev_err(&client->dev,
125 "write error: wrote 0x%x to offset 0x%x error %d",
126 val, reg, ret);
127
128 return ret;
129}
130
131static int __gc2235_flush_reg_array(struct i2c_client *client,
132 struct gc2235_write_ctrl *ctrl)
133{
134 u16 size;
135
136 if (ctrl->index == 0)
137 return 0;
138
139 size = sizeof(u8) + ctrl->index; /* 8-bit address + data */
140 ctrl->index = 0;
141
142 return gc2235_i2c_write(client, size, (u8 *)&ctrl->buffer);
143}
144
145static int __gc2235_buf_reg_array(struct i2c_client *client,
146 struct gc2235_write_ctrl *ctrl,
147 const struct gc2235_reg *next)
148{
149 int size;
150
151 if (next->type != GC2235_8BIT)
152 return -EINVAL;
153
154 size = 1;
155 ctrl->buffer.data[ctrl->index] = (u8)next->val;
156
157 /* When first item is added, we need to store its starting address */
158 if (ctrl->index == 0)
159 ctrl->buffer.addr = next->reg;
160
161 ctrl->index += size;
162
163 /*
164 * Buffer cannot guarantee free space for u32? Better flush it to avoid
165 * possible lack of memory for next item.
166 */
167 if (ctrl->index + sizeof(u8) >= GC2235_MAX_WRITE_BUF_SIZE)
168 return __gc2235_flush_reg_array(client, ctrl);
169
170 return 0;
171}
172static int __gc2235_write_reg_is_consecutive(struct i2c_client *client,
173 struct gc2235_write_ctrl *ctrl,
174 const struct gc2235_reg *next)
175{
176 if (ctrl->index == 0)
177 return 1;
178
179 return ctrl->buffer.addr + ctrl->index == next->reg;
180}
181static int gc2235_write_reg_array(struct i2c_client *client,
182 const struct gc2235_reg *reglist)
183{
184 const struct gc2235_reg *next = reglist;
185 struct gc2235_write_ctrl ctrl;
186 int err;
187
188 ctrl.index = 0;
189 for (; next->type != GC2235_TOK_TERM; next++) {
190 switch (next->type & GC2235_TOK_MASK) {
191 case GC2235_TOK_DELAY:
192 err = __gc2235_flush_reg_array(client, &ctrl);
193 if (err)
194 return err;
195 msleep(next->val);
196 break;
197 default:
198 /*
199 * If next address is not consecutive, data needs to be
200 * flushed before proceed.
201 */
202 if (!__gc2235_write_reg_is_consecutive(client, &ctrl,
203 next)) {
204 err = __gc2235_flush_reg_array(client, &ctrl);
205 if (err)
206 return err;
207 }
208 err = __gc2235_buf_reg_array(client, &ctrl, next);
209 if (err) {
210 dev_err(&client->dev, "%s: write error, aborted\n",
211 __func__);
212 return err;
213 }
214 break;
215 }
216 }
217
218 return __gc2235_flush_reg_array(client, &ctrl);
219}
220
221static int gc2235_g_focal(struct v4l2_subdev *sd, s32 *val)
222{
223 *val = (GC2235_FOCAL_LENGTH_NUM << 16) | GC2235_FOCAL_LENGTH_DEM;
224 return 0;
225}
226
227static int gc2235_g_fnumber(struct v4l2_subdev *sd, s32 *val)
228{
229 /*const f number for imx*/
230 *val = (GC2235_F_NUMBER_DEFAULT_NUM << 16) | GC2235_F_NUMBER_DEM;
231 return 0;
232}
233
234static int gc2235_g_fnumber_range(struct v4l2_subdev *sd, s32 *val)
235{
236 *val = (GC2235_F_NUMBER_DEFAULT_NUM << 24) |
237 (GC2235_F_NUMBER_DEM << 16) |
238 (GC2235_F_NUMBER_DEFAULT_NUM << 8) | GC2235_F_NUMBER_DEM;
239 return 0;
240}
241
242
243static int gc2235_get_intg_factor(struct i2c_client *client,
244 struct camera_mipi_info *info,
245 const struct gc2235_resolution *res)
246{
247 struct v4l2_subdev *sd = i2c_get_clientdata(client);
248 struct gc2235_device *dev = to_gc2235_sensor(sd);
249 struct atomisp_sensor_mode_data *buf = &info->data;
250 u16 reg_val, reg_val_h, dummy;
251 int ret;
252
c9d9602f 253 if (!info)
a49d2536
AC		 254 return -EINVAL;
255
256 /* pixel clock calculattion */
257 buf->vt_pix_clk_freq_mhz = dev->vt_pix_clk_freq_mhz = 30000000;
258
259 /* get integration time */
260 buf->coarse_integration_time_min = GC2235_COARSE_INTG_TIME_MIN;
261 buf->coarse_integration_time_max_margin =
262 GC2235_COARSE_INTG_TIME_MAX_MARGIN;
263
264 buf->fine_integration_time_min = GC2235_FINE_INTG_TIME_MIN;
265 buf->fine_integration_time_max_margin =
266 GC2235_FINE_INTG_TIME_MAX_MARGIN;
267
268 buf->fine_integration_time_def = GC2235_FINE_INTG_TIME_MIN;
269 buf->frame_length_lines = res->lines_per_frame;
270 buf->line_length_pck = res->pixels_per_line;
271 buf->read_mode = res->bin_mode;
272
273 /* get the cropping and output resolution to ISP for this mode. */
274 ret = gc2235_read_reg(client, GC2235_8BIT,
275 GC2235_H_CROP_START_H, &reg_val_h);
276 ret = gc2235_read_reg(client, GC2235_8BIT,
277 GC2235_H_CROP_START_L, &reg_val);
278 if (ret)
279 return ret;
280
bf5d0300 281 buf->crop_horizontal_start = (reg_val_h << 8) | reg_val;
a49d2536
AC		 282
283 ret = gc2235_read_reg(client, GC2235_8BIT,
284 GC2235_V_CROP_START_H, &reg_val_h);
285 ret = gc2235_read_reg(client, GC2235_8BIT,
286 GC2235_V_CROP_START_L, &reg_val);
287 if (ret)
288 return ret;
289
bf5d0300 290 buf->crop_vertical_start = (reg_val_h << 8) | reg_val;
a49d2536
AC		 291
292 ret = gc2235_read_reg(client, GC2235_8BIT,
293 GC2235_H_OUTSIZE_H, &reg_val_h);
294 ret = gc2235_read_reg(client, GC2235_8BIT,
295 GC2235_H_OUTSIZE_L, &reg_val);
296 if (ret)
297 return ret;
bf5d0300 298 buf->output_width = (reg_val_h << 8) | reg_val;
a49d2536
AC		 299
300 ret = gc2235_read_reg(client, GC2235_8BIT,
301 GC2235_V_OUTSIZE_H, &reg_val_h);
302 ret = gc2235_read_reg(client, GC2235_8BIT,
303 GC2235_V_OUTSIZE_L, &reg_val);
304 if (ret)
305 return ret;
bf5d0300 306 buf->output_height = (reg_val_h << 8) | reg_val;
a49d2536
AC		 307
308 buf->crop_horizontal_end = buf->crop_horizontal_start +
309 buf->output_width - 1;
310 buf->crop_vertical_end = buf->crop_vertical_start +
311 buf->output_height - 1;
312
313 ret = gc2235_read_reg(client, GC2235_8BIT,
314 GC2235_HB_H, &reg_val_h);
315 ret = gc2235_read_reg(client, GC2235_8BIT,
316 GC2235_HB_L, &reg_val);
317 if (ret)
318 return ret;
319
bf5d0300 320 dummy = (reg_val_h << 8) | reg_val;
a49d2536
AC		 321
322 ret = gc2235_read_reg(client, GC2235_8BIT,
323 GC2235_SH_DELAY_H, &reg_val_h);
324 ret = gc2235_read_reg(client, GC2235_8BIT,
325 GC2235_SH_DELAY_L, &reg_val);
326
327#if 0
328 buf->line_length_pck = buf->output_width + 16 + dummy +
329 (((u16)reg_val_h << 8) | (u16)reg_val) + 4;
330#endif
331 ret = gc2235_read_reg(client, GC2235_8BIT,
332 GC2235_VB_H, &reg_val_h);
333 ret = gc2235_read_reg(client, GC2235_8BIT,
334 GC2235_VB_L, &reg_val);
335 if (ret)
336 return ret;
337
338#if 0
339 buf->frame_length_lines = buf->output_height + 32 +
340 (((u16)reg_val_h << 8) | (u16)reg_val);
341#endif
342 buf->binning_factor_x = res->bin_factor_x ?
343 res->bin_factor_x : 1;
344 buf->binning_factor_y = res->bin_factor_y ?
345 res->bin_factor_y : 1;
346 return 0;
347}
348
349static long __gc2235_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
350 int gain, int digitgain)
351
352{
353 struct i2c_client *client = v4l2_get_subdevdata(sd);
354 u16 coarse_integration = (u16)coarse_itg;
355 int ret = 0;
356 u16 expo_coarse_h, expo_coarse_l, gain_val = 0xF0, gain_val2 = 0xF0;
56b41836 357 expo_coarse_h = coarse_integration >> 8;
a49d2536
AC		 358 expo_coarse_l = coarse_integration & 0xff;
359
360 ret = gc2235_write_reg(client, GC2235_8BIT,
361 GC2235_EXPOSURE_H, expo_coarse_h);
362 ret = gc2235_write_reg(client, GC2235_8BIT,
363 GC2235_EXPOSURE_L, expo_coarse_l);
364
365 if (gain <= 0x58) {
366 gain_val = 0x40;
367 gain_val2 = 0x58;
368 } else if (gain < 256) {
369 gain_val = 0x40;
370 gain_val2 = gain;
371 } else {
372 gain_val2 = 64 * gain / 256;
373 gain_val = 0xff;
374 }
375
376 ret = gc2235_write_reg(client, GC2235_8BIT,
377 GC2235_GLOBAL_GAIN, (u8)gain_val);
378 ret = gc2235_write_reg(client, GC2235_8BIT,
379 GC2235_PRE_GAIN, (u8)gain_val2);
380
381 return ret;
382}
383
384
385static int gc2235_set_exposure(struct v4l2_subdev *sd, int exposure,
386 int gain, int digitgain)
387{
388 struct gc2235_device *dev = to_gc2235_sensor(sd);
389 int ret;
390
391 mutex_lock(&dev->input_lock);
392 ret = __gc2235_set_exposure(sd, exposure, gain, digitgain);
393 mutex_unlock(&dev->input_lock);
394
395 return ret;
396}
397
398static long gc2235_s_exposure(struct v4l2_subdev *sd,
399 struct atomisp_exposure *exposure)
400{
401 int exp = exposure->integration_time[0];
402 int gain = exposure->gain[0];
403 int digitgain = exposure->gain[1];
404
405 /* we should not accept the invalid value below. */
406 if (gain == 0) {
407 struct i2c_client *client = v4l2_get_subdevdata(sd);
408 v4l2_err(client, "%s: invalid value\n", __func__);
409 return -EINVAL;
410 }
411
412 return gc2235_set_exposure(sd, exp, gain, digitgain);
413}
414static long gc2235_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
415{
416 switch (cmd) {
417 case ATOMISP_IOC_S_EXPOSURE:
418 return gc2235_s_exposure(sd, arg);
419 default:
420 return -EINVAL;
421 }
422 return 0;
423}
424/* This returns the exposure time being used. This should only be used
e17a17a0
VR		 425 * for filling in EXIF data, not for actual image processing.
426 */
a49d2536
AC		 427static int gc2235_q_exposure(struct v4l2_subdev *sd, s32 *value)
428{
429 struct i2c_client *client = v4l2_get_subdevdata(sd);
430 u16 reg_v, reg_v2;
431 int ret;
432
433 /* get exposure */
434 ret = gc2235_read_reg(client, GC2235_8BIT,
435 GC2235_EXPOSURE_L,
436 &reg_v);
437 if (ret)
438 goto err;
439
440 ret = gc2235_read_reg(client, GC2235_8BIT,
441 GC2235_EXPOSURE_H,
442 &reg_v2);
443 if (ret)
444 goto err;
445
446 reg_v += reg_v2 << 8;
447
448 *value = reg_v;
449err:
450 return ret;
451}
452
453static int gc2235_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
454{
455 struct gc2235_device *dev =
456 container_of(ctrl->handler, struct gc2235_device, ctrl_handler);
457 int ret = 0;
458
459 switch (ctrl->id) {
460 case V4L2_CID_EXPOSURE_ABSOLUTE:
461 ret = gc2235_q_exposure(&dev->sd, &ctrl->val);
462 break;
463 case V4L2_CID_FOCAL_ABSOLUTE:
464 ret = gc2235_g_focal(&dev->sd, &ctrl->val);
465 break;
466 case V4L2_CID_FNUMBER_ABSOLUTE:
467 ret = gc2235_g_fnumber(&dev->sd, &ctrl->val);
468 break;
469 case V4L2_CID_FNUMBER_RANGE:
470 ret = gc2235_g_fnumber_range(&dev->sd, &ctrl->val);
471 break;
472 default:
473 ret = -EINVAL;
474 }
475
476 return ret;
477}
478
479static const struct v4l2_ctrl_ops ctrl_ops = {
480 .g_volatile_ctrl = gc2235_g_volatile_ctrl
481};
482
6da2fa86 483static struct v4l2_ctrl_config gc2235_controls[] = {
a49d2536
AC		 484 {
485 .ops = &ctrl_ops,
486 .id = V4L2_CID_EXPOSURE_ABSOLUTE,
487 .type = V4L2_CTRL_TYPE_INTEGER,
488 .name = "exposure",
489 .min = 0x0,
490 .max = 0xffff,
491 .step = 0x01,
492 .def = 0x00,
493 .flags = 0,
494 },
495 {
496 .ops = &ctrl_ops,
497 .id = V4L2_CID_FOCAL_ABSOLUTE,
498 .type = V4L2_CTRL_TYPE_INTEGER,
499 .name = "focal length",
500 .min = GC2235_FOCAL_LENGTH_DEFAULT,
501 .max = GC2235_FOCAL_LENGTH_DEFAULT,
502 .step = 0x01,
503 .def = GC2235_FOCAL_LENGTH_DEFAULT,
504 .flags = 0,
505 },
506 {
507 .ops = &ctrl_ops,
508 .id = V4L2_CID_FNUMBER_ABSOLUTE,
509 .type = V4L2_CTRL_TYPE_INTEGER,
510 .name = "f-number",
511 .min = GC2235_F_NUMBER_DEFAULT,
512 .max = GC2235_F_NUMBER_DEFAULT,
513 .step = 0x01,
514 .def = GC2235_F_NUMBER_DEFAULT,
515 .flags = 0,
516 },
517 {
518 .ops = &ctrl_ops,
519 .id = V4L2_CID_FNUMBER_RANGE,
520 .type = V4L2_CTRL_TYPE_INTEGER,
521 .name = "f-number range",
522 .min = GC2235_F_NUMBER_RANGE,
523 .max = GC2235_F_NUMBER_RANGE,
524 .step = 0x01,
525 .def = GC2235_F_NUMBER_RANGE,
526 .flags = 0,
527 },
528};
529
530static int __gc2235_init(struct v4l2_subdev *sd)
531{
532 struct i2c_client *client = v4l2_get_subdevdata(sd);
533
534 /* restore settings */
535 gc2235_res = gc2235_res_preview;
536 N_RES = N_RES_PREVIEW;
537
538 return gc2235_write_reg_array(client, gc2235_init_settings);
539}
540
541static int is_init;
a49d2536
AC		 542
543static int power_ctrl(struct v4l2_subdev *sd, bool flag)
544{
545 int ret = -1;
546 struct gc2235_device *dev = to_gc2235_sensor(sd);
547
548 if (!dev || !dev->platform_data)
549 return -ENODEV;
550
551 /* Non-gmin platforms use the legacy callback */
552 if (dev->platform_data->power_ctrl)
553 return dev->platform_data->power_ctrl(sd, flag);
554
555 if (flag) {
556 ret = dev->platform_data->v1p8_ctrl(sd, 1);
557 usleep_range(60, 90);
558 if (ret == 0)
559 ret |= dev->platform_data->v2p8_ctrl(sd, 1);
560 } else {
561 ret = dev->platform_data->v1p8_ctrl(sd, 0);
562 ret |= dev->platform_data->v2p8_ctrl(sd, 0);
563 }
564 return ret;
565}
566
567static int gpio_ctrl(struct v4l2_subdev *sd, bool flag)
568{
569 struct gc2235_device *dev = to_gc2235_sensor(sd);
570 int ret = -1;
571
572 if (!dev || !dev->platform_data)
573 return -ENODEV;
574
575 /* Non-gmin platforms use the legacy callback */
576 if (dev->platform_data->gpio_ctrl)
577 return dev->platform_data->gpio_ctrl(sd, flag);
578
579 ret |= dev->platform_data->gpio1_ctrl(sd, !flag);
580 usleep_range(60, 90);
d64fe06e 581 return dev->platform_data->gpio0_ctrl(sd, flag);
a49d2536
AC		 582}
583
584static int power_up(struct v4l2_subdev *sd)
585{
586 struct gc2235_device *dev = to_gc2235_sensor(sd);
587 struct i2c_client *client = v4l2_get_subdevdata(sd);
588 int ret;
589
c9d9602f 590 if (!dev->platform_data) {
a49d2536
AC		 591 dev_err(&client->dev,
592 "no camera_sensor_platform_data");
593 return -ENODEV;
594 }
595 /* power control */
596 ret = power_ctrl(sd, 1);
597 if (ret)
598 goto fail_power;
599
600 /* according to DS, at least 5ms is needed between DOVDD and PWDN */
601 usleep_range(5000, 6000);
602
603 ret = dev->platform_data->flisclk_ctrl(sd, 1);
604 if (ret)
605 goto fail_clk;
606 usleep_range(5000, 6000);
607
608 /* gpio ctrl */
609 ret = gpio_ctrl(sd, 1);
610 if (ret) {
611 ret = gpio_ctrl(sd, 1);
612 if (ret)
613 goto fail_power;
614 }
615
616 msleep(5);
617 return 0;
618
619fail_clk:
620 gpio_ctrl(sd, 0);
621fail_power:
622 power_ctrl(sd, 0);
623 dev_err(&client->dev, "sensor power-up failed\n");
624
625 return ret;
626}
627
628static int power_down(struct v4l2_subdev *sd)
629{
630 struct gc2235_device *dev = to_gc2235_sensor(sd);
631 struct i2c_client *client = v4l2_get_subdevdata(sd);
632 int ret = 0;
633
c9d9602f 634 if (!dev->platform_data) {
a49d2536
AC		 635 dev_err(&client->dev,
636 "no camera_sensor_platform_data");
637 return -ENODEV;
638 }
639 /* gpio ctrl */
640 ret = gpio_ctrl(sd, 0);
641 if (ret) {
642 ret = gpio_ctrl(sd, 0);
643 if (ret)
644 dev_err(&client->dev, "gpio failed 2\n");
645 }
646
647 ret = dev->platform_data->flisclk_ctrl(sd, 0);
648 if (ret)
649 dev_err(&client->dev, "flisclk failed\n");
650
651 /* power control */
652 ret = power_ctrl(sd, 0);
653 if (ret)
654 dev_err(&client->dev, "vprog failed.\n");
655
656 return ret;
657}
658
659static int gc2235_s_power(struct v4l2_subdev *sd, int on)
660{
661 int ret;
662
663 if (on == 0)
664 ret = power_down(sd);
665 else {
666 ret = power_up(sd);
667 if (!ret)
68f9c654 668 ret = __gc2235_init(sd);
a49d2536
AC		 669 is_init = 1;
670 }
671 return ret;
672}
673
674/*
675 * distance - calculate the distance
676 * @res: resolution
677 * @w: width
678 * @h: height
679 *
680 * Get the gap between resolution and w/h.
681 * res->width/height smaller than w/h wouldn't be considered.
682 * Returns the value of gap or -1 if fail.
683 */
684#define LARGEST_ALLOWED_RATIO_MISMATCH 800
685static int distance(struct gc2235_resolution *res, u32 w, u32 h)
686{
56b41836 687 unsigned int w_ratio = (res->width << 13) / w;
a49d2536
AC		 688 unsigned int h_ratio;
689 int match;
690
691 if (h == 0)
692 return -1;
6c492211 693 h_ratio = (res->height << 13) / h;
a49d2536
AC		 694 if (h_ratio == 0)
695 return -1;
bf5d0300 696 match = abs(((w_ratio << 13) / h_ratio) - 8192);
a49d2536 697
8284d205
VR		 698 if ((w_ratio < 8192) || (h_ratio < 8192) ||
699 (match > LARGEST_ALLOWED_RATIO_MISMATCH))
a49d2536
AC		 700 return -1;
701
702 return w_ratio + h_ratio;
703}
704
705/* Return the nearest higher resolution index */
706static int nearest_resolution_index(int w, int h)
707{
708 int i;
709 int idx = -1;
710 int dist;
711 int min_dist = INT_MAX;
712 struct gc2235_resolution *tmp_res = NULL;
713
714 for (i = 0; i < N_RES; i++) {
715 tmp_res = &gc2235_res[i];
716 dist = distance(tmp_res, w, h);
717 if (dist == -1)
718 continue;
719 if (dist < min_dist) {
720 min_dist = dist;
721 idx = i;
722 }
723 }
724
725 return idx;
726}
727
728static int get_resolution_index(int w, int h)
729{
730 int i;
731
732 for (i = 0; i < N_RES; i++) {
733 if (w != gc2235_res[i].width)
734 continue;
735 if (h != gc2235_res[i].height)
736 continue;
737
738 return i;
739 }
740
741 return -1;
742}
743
744static int startup(struct v4l2_subdev *sd)
745{
746 struct gc2235_device *dev = to_gc2235_sensor(sd);
747 struct i2c_client *client = v4l2_get_subdevdata(sd);
748 int ret = 0;
749 if (is_init == 0) {
750 /* force gc2235 to do a reset in res change, otherwise it
751 * can not output normal after switching res. and it is not
752 * necessary for first time run up after power on, for the sack
753 * of performance
754 */
755 power_down(sd);
756 power_up(sd);
757 gc2235_write_reg_array(client, gc2235_init_settings);
758 }
759
760 ret = gc2235_write_reg_array(client, gc2235_res[dev->fmt_idx].regs);
761 if (ret) {
762 dev_err(&client->dev, "gc2235 write register err.\n");
763 return ret;
764 }
765 is_init = 0;
766
767 return ret;
768}
769
770static int gc2235_set_fmt(struct v4l2_subdev *sd,
771 struct v4l2_subdev_pad_config *cfg,
772 struct v4l2_subdev_format *format)
773{
774
775 struct v4l2_mbus_framefmt *fmt = &format->format;
776 struct gc2235_device *dev = to_gc2235_sensor(sd);
777 struct i2c_client *client = v4l2_get_subdevdata(sd);
778 struct camera_mipi_info *gc2235_info = NULL;
779 int ret = 0;
780 int idx;
781
782 gc2235_info = v4l2_get_subdev_hostdata(sd);
c9d9602f 783 if (!gc2235_info)
a49d2536
AC		 784 return -EINVAL;
785 if (format->pad)
786 return -EINVAL;
787 if (!fmt)
788 return -EINVAL;
789 mutex_lock(&dev->input_lock);
790 idx = nearest_resolution_index(fmt->width, fmt->height);
791 if (idx == -1) {
792 /* return the largest resolution */
793 fmt->width = gc2235_res[N_RES - 1].width;
794 fmt->height = gc2235_res[N_RES - 1].height;
795 } else {
796 fmt->width = gc2235_res[idx].width;
797 fmt->height = gc2235_res[idx].height;
798 }
799 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
800 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
801 cfg->try_fmt = *fmt;
802 mutex_unlock(&dev->input_lock);
803 return 0;
804 }
805
806 dev->fmt_idx = get_resolution_index(fmt->width, fmt->height);
807 if (dev->fmt_idx == -1) {
808 dev_err(&client->dev, "get resolution fail\n");
809 mutex_unlock(&dev->input_lock);
810 return -EINVAL;
811 }
812
813 ret = startup(sd);
814 if (ret) {
815 dev_err(&client->dev, "gc2235 startup err\n");
816 goto err;
817 }
818
819 ret = gc2235_get_intg_factor(client, gc2235_info,
820 &gc2235_res[dev->fmt_idx]);
821 if (ret)
822 dev_err(&client->dev, "failed to get integration_factor\n");
823
824err:
825 mutex_unlock(&dev->input_lock);
826 return ret;
827}
828
829static int gc2235_get_fmt(struct v4l2_subdev *sd,
830 struct v4l2_subdev_pad_config *cfg,
831 struct v4l2_subdev_format *format)
832{
833 struct v4l2_mbus_framefmt *fmt = &format->format;
834 struct gc2235_device *dev = to_gc2235_sensor(sd);
835
836 if (format->pad)
837 return -EINVAL;
838
839 if (!fmt)
840 return -EINVAL;
841
842 fmt->width = gc2235_res[dev->fmt_idx].width;
843 fmt->height = gc2235_res[dev->fmt_idx].height;
844 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
845
846 return 0;
847}
848
849static int gc2235_detect(struct i2c_client *client)
850{
851 struct i2c_adapter *adapter = client->adapter;
852 u16 high, low;
853 int ret;
854 u16 id;
855
856 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
857 return -ENODEV;
858
859 ret = gc2235_read_reg(client, GC2235_8BIT,
860 GC2235_SENSOR_ID_H, &high);
861 if (ret) {
862 dev_err(&client->dev, "sensor_id_high = 0x%x\n", high);
863 return -ENODEV;
864 }
865 ret = gc2235_read_reg(client, GC2235_8BIT,
866 GC2235_SENSOR_ID_L, &low);
bf5d0300 867 id = ((high << 8) | low);
a49d2536
AC		 868
869 if (id != GC2235_ID) {
870 dev_err(&client->dev, "sensor ID error, 0x%x\n", id);
871 return -ENODEV;
872 }
873
874 dev_info(&client->dev, "detect gc2235 success\n");
875 return 0;
876}
877
878static int gc2235_s_stream(struct v4l2_subdev *sd, int enable)
879{
880 struct gc2235_device *dev = to_gc2235_sensor(sd);
881 struct i2c_client *client = v4l2_get_subdevdata(sd);
882 int ret;
883 mutex_lock(&dev->input_lock);
884
885 if (enable)
886 ret = gc2235_write_reg_array(client, gc2235_stream_on);
887 else
888 ret = gc2235_write_reg_array(client, gc2235_stream_off);
889
890 mutex_unlock(&dev->input_lock);
891 return ret;
892}
893
894
895static int gc2235_s_config(struct v4l2_subdev *sd,
896 int irq, void *platform_data)
897{
898 struct gc2235_device *dev = to_gc2235_sensor(sd);
899 struct i2c_client *client = v4l2_get_subdevdata(sd);
900 int ret = 0;
901
c9d9602f 902 if (!platform_data)
a49d2536
AC		 903 return -ENODEV;
904
905 dev->platform_data =
906 (struct camera_sensor_platform_data *)platform_data;
907
908 mutex_lock(&dev->input_lock);
909 if (dev->platform_data->platform_init) {
910 ret = dev->platform_data->platform_init(client);
911 if (ret) {
912 dev_err(&client->dev, "platform init err\n");
913 goto platform_init_failed;
914 }
915 }
916 /* power off the module, then power on it in future
917 * as first power on by board may not fulfill the
918 * power on sequqence needed by the module
919 */
920 ret = power_down(sd);
921 if (ret) {
922 dev_err(&client->dev, "gc2235 power-off err.\n");
923 goto fail_power_off;
924 }
925
926 ret = power_up(sd);
927 if (ret) {
928 dev_err(&client->dev, "gc2235 power-up err.\n");
929 goto fail_power_on;
930 }
931
932 ret = dev->platform_data->csi_cfg(sd, 1);
933 if (ret)
934 goto fail_csi_cfg;
935
936 /* config & detect sensor */
937 ret = gc2235_detect(client);
938 if (ret) {
939 dev_err(&client->dev, "gc2235_detect err s_config.\n");
940 goto fail_csi_cfg;
941 }
942
943 /* turn off sensor, after probed */
944 ret = power_down(sd);
945 if (ret) {
946 dev_err(&client->dev, "gc2235 power-off err.\n");
947 goto fail_csi_cfg;
948 }
949 mutex_unlock(&dev->input_lock);
950
951 return 0;
952
953fail_csi_cfg:
954 dev->platform_data->csi_cfg(sd, 0);
955fail_power_on:
956 power_down(sd);
957 dev_err(&client->dev, "sensor power-gating failed\n");
958fail_power_off:
959 if (dev->platform_data->platform_deinit)
960 dev->platform_data->platform_deinit();
961platform_init_failed:
962 mutex_unlock(&dev->input_lock);
963 return ret;
964}
965
966static int gc2235_g_parm(struct v4l2_subdev *sd,
967 struct v4l2_streamparm *param)
968{
969 struct gc2235_device *dev = to_gc2235_sensor(sd);
970 struct i2c_client *client = v4l2_get_subdevdata(sd);
971
972 if (!param)
973 return -EINVAL;
974
975 if (param->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
976 dev_err(&client->dev, "unsupported buffer type.\n");
977 return -EINVAL;
978 }
979
980 memset(param, 0, sizeof(*param));
981 param->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
982
983 if (dev->fmt_idx >= 0 && dev->fmt_idx < N_RES) {
984 param->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
985 param->parm.capture.timeperframe.numerator = 1;
986 param->parm.capture.capturemode = dev->run_mode;
987 param->parm.capture.timeperframe.denominator =
988 gc2235_res[dev->fmt_idx].fps;
989 }
990 return 0;
991}
992
993static int gc2235_s_parm(struct v4l2_subdev *sd,
994 struct v4l2_streamparm *param)
995{
996 struct gc2235_device *dev = to_gc2235_sensor(sd);
997 dev->run_mode = param->parm.capture.capturemode;
998
999 mutex_lock(&dev->input_lock);
1000 switch (dev->run_mode) {
1001 case CI_MODE_VIDEO:
1002 gc2235_res = gc2235_res_video;
1003 N_RES = N_RES_VIDEO;
1004 break;
1005 case CI_MODE_STILL_CAPTURE:
1006 gc2235_res = gc2235_res_still;
1007 N_RES = N_RES_STILL;
1008 break;
1009 default:
1010 gc2235_res = gc2235_res_preview;
1011 N_RES = N_RES_PREVIEW;
1012 }
1013 mutex_unlock(&dev->input_lock);
1014 return 0;
1015}
1016
1017static int gc2235_g_frame_interval(struct v4l2_subdev *sd,
1018 struct v4l2_subdev_frame_interval *interval)
1019{
1020 struct gc2235_device *dev = to_gc2235_sensor(sd);
1021
1022 interval->interval.numerator = 1;
1023 interval->interval.denominator = gc2235_res[dev->fmt_idx].fps;
1024
1025 return 0;
1026}
1027
1028static int gc2235_enum_mbus_code(struct v4l2_subdev *sd,
1029 struct v4l2_subdev_pad_config *cfg,
1030 struct v4l2_subdev_mbus_code_enum *code)
1031{
1032 if (code->index >= MAX_FMTS)
1033 return -EINVAL;
1034
1035 code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
1036 return 0;
1037}
1038
1039static int gc2235_enum_frame_size(struct v4l2_subdev *sd,
1040 struct v4l2_subdev_pad_config *cfg,
1041 struct v4l2_subdev_frame_size_enum *fse)
1042{
1043 int index = fse->index;
1044
1045 if (index >= N_RES)
1046 return -EINVAL;
1047
1048 fse->min_width = gc2235_res[index].width;
1049 fse->min_height = gc2235_res[index].height;
1050 fse->max_width = gc2235_res[index].width;
1051 fse->max_height = gc2235_res[index].height;
1052
1053 return 0;
1054
1055}
1056
1057static int gc2235_g_skip_frames(struct v4l2_subdev *sd, u32 *frames)
1058{
1059 struct gc2235_device *dev = to_gc2235_sensor(sd);
1060
1061 mutex_lock(&dev->input_lock);
1062 *frames = gc2235_res[dev->fmt_idx].skip_frames;
1063 mutex_unlock(&dev->input_lock);
1064
1065 return 0;
1066}
1067
1068static const struct v4l2_subdev_sensor_ops gc2235_sensor_ops = {
1069 .g_skip_frames = gc2235_g_skip_frames,
1070};
1071
1072static const struct v4l2_subdev_video_ops gc2235_video_ops = {
1073 .s_stream = gc2235_s_stream,
1074 .g_parm = gc2235_g_parm,
1075 .s_parm = gc2235_s_parm,
1076 .g_frame_interval = gc2235_g_frame_interval,
1077};
1078
1079static const struct v4l2_subdev_core_ops gc2235_core_ops = {
1080 .s_power = gc2235_s_power,
1081 .ioctl = gc2235_ioctl,
1082};
1083
1084static const struct v4l2_subdev_pad_ops gc2235_pad_ops = {
1085 .enum_mbus_code = gc2235_enum_mbus_code,
1086 .enum_frame_size = gc2235_enum_frame_size,
1087 .get_fmt = gc2235_get_fmt,
1088 .set_fmt = gc2235_set_fmt,
1089};
1090
1091static const struct v4l2_subdev_ops gc2235_ops = {
1092 .core = &gc2235_core_ops,
1093 .video = &gc2235_video_ops,
1094 .pad = &gc2235_pad_ops,
1095 .sensor = &gc2235_sensor_ops,
1096};
1097
1098static int gc2235_remove(struct i2c_client *client)
1099{
1100 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1101 struct gc2235_device *dev = to_gc2235_sensor(sd);
1102 dev_dbg(&client->dev, "gc2235_remove...\n");
1103
1104 if (dev->platform_data->platform_deinit)
1105 dev->platform_data->platform_deinit();
1106
1107 dev->platform_data->csi_cfg(sd, 0);
1108
1109 v4l2_device_unregister_subdev(sd);
1110 media_entity_cleanup(&dev->sd.entity);
1111 v4l2_ctrl_handler_free(&dev->ctrl_handler);
1112 kfree(dev);
1113
1114 return 0;
1115}
1116
1117static int gc2235_probe(struct i2c_client *client,
1118 const struct i2c_device_id *id)
1119{
1120 struct gc2235_device *dev;
1121 void *gcpdev;
1122 int ret;
1123 unsigned int i;
1124
1125 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
309167b9 1126 if (!dev)
a49d2536 1127 return -ENOMEM;
a49d2536
AC		 1128
1129 mutex_init(&dev->input_lock);
1130
1131 dev->fmt_idx = 0;
1132 v4l2_i2c_subdev_init(&(dev->sd), client, &gc2235_ops);
1133
1134 gcpdev = client->dev.platform_data;
1135 if (ACPI_COMPANION(&client->dev))
1136 gcpdev = gmin_camera_platform_data(&dev->sd,
1137 ATOMISP_INPUT_FORMAT_RAW_10,
1138 atomisp_bayer_order_grbg);
1139
1140 ret = gc2235_s_config(&dev->sd, client->irq, gcpdev);
1141 if (ret)
1142 goto out_free;
1143
1144 dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1145 dev->pad.flags = MEDIA_PAD_FL_SOURCE;
1146 dev->format.code = MEDIA_BUS_FMT_SBGGR10_1X10;
1147 dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1148 ret =
1149 v4l2_ctrl_handler_init(&dev->ctrl_handler,
1150 ARRAY_SIZE(gc2235_controls));
1151 if (ret) {
1152 gc2235_remove(client);
1153 return ret;
1154 }
1155
1156 for (i = 0; i < ARRAY_SIZE(gc2235_controls); i++)
1157 v4l2_ctrl_new_custom(&dev->ctrl_handler, &gc2235_controls[i],
1158 NULL);
1159
1160 if (dev->ctrl_handler.error) {
1161 gc2235_remove(client);
1162 return dev->ctrl_handler.error;
1163 }
1164
1165 /* Use same lock for controls as for everything else. */
1166 dev->ctrl_handler.lock = &dev->input_lock;
1167 dev->sd.ctrl_handler = &dev->ctrl_handler;
1168
1169 ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad);
1170 if (ret)
1171 gc2235_remove(client);
1172
1173 if (ACPI_HANDLE(&client->dev))
1174 ret = atomisp_register_i2c_module(&dev->sd, gcpdev, RAW_CAMERA);
1175
1176 return ret;
1177out_free:
1178 v4l2_device_unregister_subdev(&dev->sd);
1179 kfree(dev);
1180
1181 return ret;
1182}
1183
e9e8c1cd 1184static const struct acpi_device_id gc2235_acpi_match[] = {
a49d2536
AC		 1185 { "INT33F8" },
1186 {},
1187};
1188
1189MODULE_DEVICE_TABLE(acpi, gc2235_acpi_match);
1190MODULE_DEVICE_TABLE(i2c, gc2235_id);
1191static struct i2c_driver gc2235_driver = {
1192 .driver = {
a49d2536
AC		 1193 .name = GC2235_NAME,
1194 .acpi_match_table = ACPI_PTR(gc2235_acpi_match),
1195 },
1196 .probe = gc2235_probe,
1197 .remove = gc2235_remove,
1198 .id_table = gc2235_id,
1199};
2cb63c4c 1200module_i2c_driver(gc2235_driver);
a49d2536
AC		 1201
1202MODULE_AUTHOR("Shuguang Gong <Shuguang.Gong@intel.com>");
1203MODULE_DESCRIPTION("A low-level driver for GC2235 sensors");
1204MODULE_LICENSE("GPL");
ubuntu-bionic-kernel mirror