1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
|
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/dmi.h>
#include <linux/efi.h>
#include <linux/pci.h>
#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <media/v4l2-subdev.h>
#include <linux/mfd/intel_soc_pmic.h>
#include <linux/regulator/consumer.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio.h>
#include <linux/platform_device.h>
#include "../../include/linux/atomisp_platform.h"
#include "../../include/linux/atomisp_gmin_platform.h"
#define MAX_SUBDEVS 8
#define VLV2_CLK_PLL_19P2MHZ 1 /* XTAL on CHT */
#define ELDO1_SEL_REG 0x19
#define ELDO1_1P8V 0x16
#define ELDO1_CTRL_SHIFT 0x00
#define ELDO2_SEL_REG 0x1a
#define ELDO2_1P8V 0x16
#define ELDO2_CTRL_SHIFT 0x01
struct gmin_subdev {
struct v4l2_subdev *subdev;
int clock_num;
int clock_src;
bool clock_on;
struct clk *pmc_clk;
struct gpio_desc *gpio0;
struct gpio_desc *gpio1;
struct regulator *v1p8_reg;
struct regulator *v2p8_reg;
struct regulator *v1p2_reg;
struct regulator *v2p8_vcm_reg;
enum atomisp_camera_port csi_port;
unsigned int csi_lanes;
enum atomisp_input_format csi_fmt;
enum atomisp_bayer_order csi_bayer;
bool v1p8_on;
bool v2p8_on;
bool v1p2_on;
bool v2p8_vcm_on;
};
static struct gmin_subdev gmin_subdevs[MAX_SUBDEVS];
static enum { PMIC_UNSET = 0, PMIC_REGULATOR, PMIC_AXP, PMIC_TI,
PMIC_CRYSTALCOVE } pmic_id;
/* The atomisp uses type==0 for the end-of-list marker, so leave space. */
static struct intel_v4l2_subdev_table pdata_subdevs[MAX_SUBDEVS + 1];
static const struct atomisp_platform_data pdata = {
.subdevs = pdata_subdevs,
};
/*
* Something of a hack. The ECS E7 board drives camera 2.8v from an
* external regulator instead of the PMIC. There's a gmin_CamV2P8
* config variable that specifies the GPIO to handle this particular
* case, but this needs a broader architecture for handling camera
* power.
*/
enum { V2P8_GPIO_UNSET = -2, V2P8_GPIO_NONE = -1 };
static int v2p8_gpio = V2P8_GPIO_UNSET;
/*
* Something of a hack. The CHT RVP board drives camera 1.8v from an
* external regulator instead of the PMIC just like ECS E7 board, see the
* comments above.
*/
enum { V1P8_GPIO_UNSET = -2, V1P8_GPIO_NONE = -1 };
static int v1p8_gpio = V1P8_GPIO_UNSET;
static LIST_HEAD(vcm_devices);
static DEFINE_MUTEX(vcm_lock);
static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev);
/*
* Legacy/stub behavior copied from upstream platform_camera.c. The
* atomisp driver relies on these values being non-NULL in a few
* places, even though they are hard-coded in all current
* implementations.
*/
const struct atomisp_camera_caps *atomisp_get_default_camera_caps(void)
{
static const struct atomisp_camera_caps caps = {
.sensor_num = 1,
.sensor = {
{ .stream_num = 1, },
},
};
return ∩︀
}
EXPORT_SYMBOL_GPL(atomisp_get_default_camera_caps);
const struct atomisp_platform_data *atomisp_get_platform_data(void)
{
return &pdata;
}
EXPORT_SYMBOL_GPL(atomisp_get_platform_data);
int atomisp_register_i2c_module(struct v4l2_subdev *subdev,
struct camera_sensor_platform_data *plat_data,
enum intel_v4l2_subdev_type type)
{
int i;
struct i2c_board_info *bi;
struct gmin_subdev *gs;
struct i2c_client *client = v4l2_get_subdevdata(subdev);
struct acpi_device *adev = ACPI_COMPANION(&client->dev);
dev_info(&client->dev, "register atomisp i2c module type %d\n", type);
/* The windows driver model (and thus most BIOSes by default)
* uses ACPI runtime power management for camera devices, but
* we don't. Disable it, or else the rails will be needlessly
* tickled during suspend/resume. This has caused power and
* performance issues on multiple devices.
*/
adev->power.flags.power_resources = 0;
for (i = 0; i < MAX_SUBDEVS; i++)
if (!pdata.subdevs[i].type)
break;
if (pdata.subdevs[i].type)
return -ENOMEM;
/* Note subtlety of initialization order: at the point where
* this registration API gets called, the platform data
* callbacks have probably already been invoked, so the
* gmin_subdev struct is already initialized for us.
*/
gs = find_gmin_subdev(subdev);
pdata.subdevs[i].type = type;
pdata.subdevs[i].port = gs->csi_port;
pdata.subdevs[i].subdev = subdev;
pdata.subdevs[i].v4l2_subdev.i2c_adapter_id = client->adapter->nr;
/* Convert i2c_client to i2c_board_info */
bi = &pdata.subdevs[i].v4l2_subdev.board_info;
memcpy(bi->type, client->name, I2C_NAME_SIZE);
bi->flags = client->flags;
bi->addr = client->addr;
bi->irq = client->irq;
bi->platform_data = plat_data;
return 0;
}
EXPORT_SYMBOL_GPL(atomisp_register_i2c_module);
struct v4l2_subdev *atomisp_gmin_find_subdev(struct i2c_adapter *adapter,
struct i2c_board_info *board_info)
{
int i;
for (i = 0; i < MAX_SUBDEVS && pdata.subdevs[i].type; i++) {
struct intel_v4l2_subdev_table *sd = &pdata.subdevs[i];
if (sd->v4l2_subdev.i2c_adapter_id == adapter->nr &&
sd->v4l2_subdev.board_info.addr == board_info->addr)
return sd->subdev;
}
return NULL;
}
EXPORT_SYMBOL_GPL(atomisp_gmin_find_subdev);
int atomisp_gmin_remove_subdev(struct v4l2_subdev *sd)
{
int i, j;
if (!sd)
return 0;
for (i = 0; i < MAX_SUBDEVS; i++) {
if (pdata.subdevs[i].subdev == sd) {
for (j = i + 1; j <= MAX_SUBDEVS; j++)
pdata.subdevs[j - 1] = pdata.subdevs[j];
}
if (gmin_subdevs[i].subdev == sd) {
if (gmin_subdevs[i].gpio0)
gpiod_put(gmin_subdevs[i].gpio0);
gmin_subdevs[i].gpio0 = NULL;
if (gmin_subdevs[i].gpio1)
gpiod_put(gmin_subdevs[i].gpio1);
gmin_subdevs[i].gpio1 = NULL;
if (pmic_id == PMIC_REGULATOR) {
regulator_put(gmin_subdevs[i].v1p8_reg);
regulator_put(gmin_subdevs[i].v2p8_reg);
regulator_put(gmin_subdevs[i].v1p2_reg);
regulator_put(gmin_subdevs[i].v2p8_vcm_reg);
}
gmin_subdevs[i].subdev = NULL;
}
}
return 0;
}
EXPORT_SYMBOL_GPL(atomisp_gmin_remove_subdev);
struct gmin_cfg_var {
const char *name, *val;
};
static struct gmin_cfg_var ffrd8_vars[] = {
{ "INTCF1B:00_ImxId", "0x134" },
{ "INTCF1B:00_CsiPort", "1" },
{ "INTCF1B:00_CsiLanes", "4" },
{ "INTCF1B:00_CamClk", "0" },
{},
};
/* Cribbed from MCG defaults in the mt9m114 driver, not actually verified
* vs. T100 hardware
*/
static struct gmin_cfg_var t100_vars[] = {
{ "INT33F0:00_CsiPort", "0" },
{ "INT33F0:00_CsiLanes", "1" },
{ "INT33F0:00_CamClk", "1" },
{},
};
static struct gmin_cfg_var mrd7_vars[] = {
{"INT33F8:00_CamType", "1"},
{"INT33F8:00_CsiPort", "1"},
{"INT33F8:00_CsiLanes", "2"},
{"INT33F8:00_CsiFmt", "13"},
{"INT33F8:00_CsiBayer", "0"},
{"INT33F8:00_CamClk", "0"},
{"INT33F9:00_CamType", "1"},
{"INT33F9:00_CsiPort", "0"},
{"INT33F9:00_CsiLanes", "1"},
{"INT33F9:00_CsiFmt", "13"},
{"INT33F9:00_CsiBayer", "0"},
{"INT33F9:00_CamClk", "1"},
{},
};
static struct gmin_cfg_var ecs7_vars[] = {
{"INT33BE:00_CsiPort", "1"},
{"INT33BE:00_CsiLanes", "2"},
{"INT33BE:00_CsiFmt", "13"},
{"INT33BE:00_CsiBayer", "2"},
{"INT33BE:00_CamClk", "0"},
{"INT33F0:00_CsiPort", "0"},
{"INT33F0:00_CsiLanes", "1"},
{"INT33F0:00_CsiFmt", "13"},
{"INT33F0:00_CsiBayer", "0"},
{"INT33F0:00_CamClk", "1"},
{"gmin_V2P8GPIO", "402"},
{},
};
static struct gmin_cfg_var i8880_vars[] = {
{"XXOV2680:00_CsiPort", "1"},
{"XXOV2680:00_CsiLanes", "1"},
{"XXOV2680:00_CamClk", "0"},
{"XXGC0310:00_CsiPort", "0"},
{"XXGC0310:00_CsiLanes", "1"},
{"XXGC0310:00_CamClk", "1"},
{},
};
static const struct dmi_system_id gmin_vars[] = {
{
.ident = "BYT-T FFD8",
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"),
},
.driver_data = ffrd8_vars,
},
{
.ident = "T100TA",
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "T100TA"),
},
.driver_data = t100_vars,
},
{
.ident = "MRD7",
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "TABLET"),
DMI_MATCH(DMI_BOARD_VERSION, "MRD 7"),
},
.driver_data = mrd7_vars,
},
{
.ident = "ST70408",
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "ST70408"),
},
.driver_data = ecs7_vars,
},
{
.ident = "VTA0803",
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "VTA0803"),
},
.driver_data = i8880_vars,
},
{}
};
#define GMIN_CFG_VAR_EFI_GUID EFI_GUID(0xecb54cd9, 0xe5ae, 0x4fdc, \
0xa9, 0x71, 0xe8, 0x77, \
0x75, 0x60, 0x68, 0xf7)
#define CFG_VAR_NAME_MAX 64
#define GMIN_PMC_CLK_NAME 14 /* "pmc_plt_clk_[0..5]" */
static char gmin_pmc_clk_name[GMIN_PMC_CLK_NAME];
static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
{
int i, ret;
struct device *dev;
struct i2c_client *client = v4l2_get_subdevdata(subdev);
if (!pmic_id)
pmic_id = PMIC_REGULATOR;
if (!client)
return NULL;
dev = &client->dev;
for (i = 0; i < MAX_SUBDEVS && gmin_subdevs[i].subdev; i++)
;
if (i >= MAX_SUBDEVS)
return NULL;
dev_info(dev,
"gmin: initializing atomisp module subdev data.PMIC ID %d\n",
pmic_id);
gmin_subdevs[i].subdev = subdev;
gmin_subdevs[i].clock_num = gmin_get_var_int(dev, "CamClk", 0);
/*WA:CHT requires XTAL clock as PLL is not stable.*/
gmin_subdevs[i].clock_src = gmin_get_var_int(dev, "ClkSrc",
VLV2_CLK_PLL_19P2MHZ);
gmin_subdevs[i].csi_port = gmin_get_var_int(dev, "CsiPort", 0);
gmin_subdevs[i].csi_lanes = gmin_get_var_int(dev, "CsiLanes", 1);
/* get PMC clock with clock framework */
snprintf(gmin_pmc_clk_name,
sizeof(gmin_pmc_clk_name),
"%s_%d", "pmc_plt_clk", gmin_subdevs[i].clock_num);
gmin_subdevs[i].pmc_clk = devm_clk_get(dev, gmin_pmc_clk_name);
if (IS_ERR(gmin_subdevs[i].pmc_clk)) {
ret = PTR_ERR(gmin_subdevs[i].pmc_clk);
dev_err(dev,
"Failed to get clk from %s : %d\n",
gmin_pmc_clk_name,
ret);
return NULL;
}
/*
* The firmware might enable the clock at
* boot (this information may or may not
* be reflected in the enable clock register).
* To change the rate we must disable the clock
* first to cover these cases. Due to common
* clock framework restrictions that do not allow
* to disable a clock that has not been enabled,
* we need to enable the clock first.
*/
ret = clk_prepare_enable(gmin_subdevs[i].pmc_clk);
if (!ret)
clk_disable_unprepare(gmin_subdevs[i].pmc_clk);
gmin_subdevs[i].gpio0 = gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW);
if (IS_ERR(gmin_subdevs[i].gpio0))
gmin_subdevs[i].gpio0 = NULL;
gmin_subdevs[i].gpio1 = gpiod_get_index(dev, NULL, 1, GPIOD_OUT_LOW);
if (IS_ERR(gmin_subdevs[i].gpio1))
gmin_subdevs[i].gpio1 = NULL;
if (pmic_id == PMIC_REGULATOR) {
gmin_subdevs[i].v1p8_reg = regulator_get(dev, "V1P8SX");
gmin_subdevs[i].v2p8_reg = regulator_get(dev, "V2P8SX");
gmin_subdevs[i].v1p2_reg = regulator_get(dev, "V1P2A");
gmin_subdevs[i].v2p8_vcm_reg = regulator_get(dev, "VPROG4B");
/* Note: ideally we would initialize v[12]p8_on to the
* output of regulator_is_enabled(), but sadly that
* API is broken with the current drivers, returning
* "1" for a regulator that will then emit a
* "unbalanced disable" WARNing if we try to disable
* it.
*/
}
return &gmin_subdevs[i];
}
static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev)
{
int i;
for (i = 0; i < MAX_SUBDEVS; i++)
if (gmin_subdevs[i].subdev == subdev)
return &gmin_subdevs[i];
return gmin_subdev_add(subdev);
}
static int gmin_gpio0_ctrl(struct v4l2_subdev *subdev, int on)
{
struct gmin_subdev *gs = find_gmin_subdev(subdev);
if (gs) {
gpiod_set_value(gs->gpio0, on);
return 0;
}
return -EINVAL;
}
static int gmin_gpio1_ctrl(struct v4l2_subdev *subdev, int on)
{
struct gmin_subdev *gs = find_gmin_subdev(subdev);
if (gs) {
gpiod_set_value(gs->gpio1, on);
return 0;
}
return -EINVAL;
}
static int gmin_v1p2_ctrl(struct v4l2_subdev *subdev, int on)
{
struct gmin_subdev *gs = find_gmin_subdev(subdev);
if (!gs || gs->v1p2_on == on)
return 0;
gs->v1p2_on = on;
if (gs->v1p2_reg) {
if (on)
return regulator_enable(gs->v1p2_reg);
else
return regulator_disable(gs->v1p2_reg);
}
/*TODO:v1p2 needs to extend to other PMICs*/
return -EINVAL;
}
static int gmin_v1p8_ctrl(struct v4l2_subdev *subdev, int on)
{
struct gmin_subdev *gs = find_gmin_subdev(subdev);
int ret;
if (v1p8_gpio == V1P8_GPIO_UNSET) {
v1p8_gpio = gmin_get_var_int(NULL, "V1P8GPIO", V1P8_GPIO_NONE);
if (v1p8_gpio != V1P8_GPIO_NONE) {
pr_info("atomisp_gmin_platform: 1.8v power on GPIO %d\n",
v1p8_gpio);
ret = gpio_request(v1p8_gpio, "camera_v1p8_en");
if (!ret)
ret = gpio_direction_output(v1p8_gpio, 0);
if (ret)
pr_err("V1P8 GPIO initialization failed\n");
}
}
if (!gs || gs->v1p8_on == on)
return 0;
gs->v1p8_on = on;
if (v1p8_gpio >= 0)
gpio_set_value(v1p8_gpio, on);
if (gs->v1p8_reg) {
regulator_set_voltage(gs->v1p8_reg, 1800000, 1800000);
if (on)
return regulator_enable(gs->v1p8_reg);
else
return regulator_disable(gs->v1p8_reg);
}
return -EINVAL;
}
static int gmin_v2p8_ctrl(struct v4l2_subdev *subdev, int on)
{
struct gmin_subdev *gs = find_gmin_subdev(subdev);
int ret;
if (v2p8_gpio == V2P8_GPIO_UNSET) {
v2p8_gpio = gmin_get_var_int(NULL, "V2P8GPIO", V2P8_GPIO_NONE);
if (v2p8_gpio != V2P8_GPIO_NONE) {
pr_info("atomisp_gmin_platform: 2.8v power on GPIO %d\n",
v2p8_gpio);
ret = gpio_request(v2p8_gpio, "camera_v2p8");
if (!ret)
ret = gpio_direction_output(v2p8_gpio, 0);
if (ret)
pr_err("V2P8 GPIO initialization failed\n");
}
}
if (!gs || gs->v2p8_on == on)
return 0;
gs->v2p8_on = on;
if (v2p8_gpio >= 0)
gpio_set_value(v2p8_gpio, on);
if (gs->v2p8_reg) {
regulator_set_voltage(gs->v2p8_reg, 2900000, 2900000);
if (on)
return regulator_enable(gs->v2p8_reg);
else
return regulator_disable(gs->v2p8_reg);
}
return -EINVAL;
}
static int gmin_flisclk_ctrl(struct v4l2_subdev *subdev, int on)
{
int ret = 0;
struct gmin_subdev *gs = find_gmin_subdev(subdev);
struct i2c_client *client = v4l2_get_subdevdata(subdev);
if (gs->clock_on == !!on)
return 0;
if (on) {
ret = clk_set_rate(gs->pmc_clk, gs->clock_src);
if (ret)
dev_err(&client->dev, "unable to set PMC rate %d\n",
gs->clock_src);
ret = clk_prepare_enable(gs->pmc_clk);
if (ret == 0)
gs->clock_on = true;
} else {
clk_disable_unprepare(gs->pmc_clk);
gs->clock_on = false;
}
return ret;
}
static int gmin_csi_cfg(struct v4l2_subdev *sd, int flag)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct gmin_subdev *gs = find_gmin_subdev(sd);
if (!client || !gs)
return -ENODEV;
return camera_sensor_csi(sd, gs->csi_port, gs->csi_lanes,
gs->csi_fmt, gs->csi_bayer, flag);
}
static struct camera_vcm_control *gmin_get_vcm_ctrl(struct v4l2_subdev *subdev,
char *camera_module)
{
struct i2c_client *client = v4l2_get_subdevdata(subdev);
struct gmin_subdev *gs = find_gmin_subdev(subdev);
struct camera_vcm_control *vcm;
if (client == NULL || gs == NULL)
return NULL;
if (!camera_module)
return NULL;
mutex_lock(&vcm_lock);
list_for_each_entry(vcm, &vcm_devices, list) {
if (!strcmp(camera_module, vcm->camera_module)) {
mutex_unlock(&vcm_lock);
return vcm;
}
}
mutex_unlock(&vcm_lock);
return NULL;
}
static struct camera_sensor_platform_data gmin_plat = {
.gpio0_ctrl = gmin_gpio0_ctrl,
.gpio1_ctrl = gmin_gpio1_ctrl,
.v1p8_ctrl = gmin_v1p8_ctrl,
.v2p8_ctrl = gmin_v2p8_ctrl,
.v1p2_ctrl = gmin_v1p2_ctrl,
.flisclk_ctrl = gmin_flisclk_ctrl,
.csi_cfg = gmin_csi_cfg,
.get_vcm_ctrl = gmin_get_vcm_ctrl,
};
struct camera_sensor_platform_data *gmin_camera_platform_data(
struct v4l2_subdev *subdev,
enum atomisp_input_format csi_format,
enum atomisp_bayer_order csi_bayer)
{
struct gmin_subdev *gs = find_gmin_subdev(subdev);
gs->csi_fmt = csi_format;
gs->csi_bayer = csi_bayer;
return &gmin_plat;
}
EXPORT_SYMBOL_GPL(gmin_camera_platform_data);
int atomisp_gmin_register_vcm_control(struct camera_vcm_control *vcmCtrl)
{
if (!vcmCtrl)
return -EINVAL;
mutex_lock(&vcm_lock);
list_add_tail(&vcmCtrl->list, &vcm_devices);
mutex_unlock(&vcm_lock);
return 0;
}
EXPORT_SYMBOL_GPL(atomisp_gmin_register_vcm_control);
static int gmin_get_hardcoded_var(struct gmin_cfg_var *varlist,
const char *var8, char *out, size_t *out_len)
{
struct gmin_cfg_var *gv;
for (gv = varlist; gv->name; gv++) {
size_t vl;
if (strcmp(var8, gv->name))
continue;
vl = strlen(gv->val);
if (vl > *out_len - 1)
return -ENOSPC;
strcpy(out, gv->val);
*out_len = vl;
return 0;
}
return -EINVAL;
}
/* Retrieves a device-specific configuration variable. The dev
* argument should be a device with an ACPI companion, as all
* configuration is based on firmware ID.
*/
static int gmin_get_config_var(struct device *dev, const char *var,
char *out, size_t *out_len)
{
char var8[CFG_VAR_NAME_MAX];
efi_char16_t var16[CFG_VAR_NAME_MAX];
struct efivar_entry *ev;
const struct dmi_system_id *id;
int i, ret;
if (dev && ACPI_COMPANION(dev))
dev = &ACPI_COMPANION(dev)->dev;
if (dev)
ret = snprintf(var8, sizeof(var8), "%s_%s", dev_name(dev), var);
else
ret = snprintf(var8, sizeof(var8), "gmin_%s", var);
if (ret < 0 || ret >= sizeof(var8) - 1)
return -EINVAL;
/* First check a hard-coded list of board-specific variables.
* Some device firmwares lack the ability to set EFI variables at
* runtime.
*/
id = dmi_first_match(gmin_vars);
if (id)
return gmin_get_hardcoded_var(id->driver_data, var8, out, out_len);
/* Our variable names are ASCII by construction, but EFI names
* are wide chars. Convert and zero-pad.
*/
memset(var16, 0, sizeof(var16));
for (i = 0; i < sizeof(var8) && var8[i]; i++)
var16[i] = var8[i];
/* To avoid owerflows when calling the efivar API */
if (*out_len > ULONG_MAX)
return -EINVAL;
/* Not sure this API usage is kosher; efivar_entry_get()'s
* implementation simply uses VariableName and VendorGuid from
* the struct and ignores the rest, but it seems like there
* ought to be an "official" efivar_entry registered
* somewhere?
*/
ev = kzalloc(sizeof(*ev), GFP_KERNEL);
if (!ev)
return -ENOMEM;
memcpy(&ev->var.VariableName, var16, sizeof(var16));
ev->var.VendorGuid = GMIN_CFG_VAR_EFI_GUID;
ev->var.DataSize = *out_len;
ret = efivar_entry_get(ev, &ev->var.Attributes,
&ev->var.DataSize, ev->var.Data);
if (ret == 0) {
memcpy(out, ev->var.Data, ev->var.DataSize);
*out_len = ev->var.DataSize;
} else if (dev) {
dev_warn(dev, "Failed to find gmin variable %s\n", var8);
}
kfree(ev);
return ret;
}
int gmin_get_var_int(struct device *dev, const char *var, int def)
{
char val[CFG_VAR_NAME_MAX];
size_t len = sizeof(val);
long result;
int ret;
ret = gmin_get_config_var(dev, var, val, &len);
if (!ret) {
val[len] = 0;
ret = kstrtol(val, 0, &result);
}
return ret ? def : result;
}
EXPORT_SYMBOL_GPL(gmin_get_var_int);
int camera_sensor_csi(struct v4l2_subdev *sd, u32 port,
u32 lanes, u32 format, u32 bayer_order, int flag)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct camera_mipi_info *csi = NULL;
if (flag) {
csi = kzalloc(sizeof(*csi), GFP_KERNEL);
if (!csi)
return -ENOMEM;
csi->port = port;
csi->num_lanes = lanes;
csi->input_format = format;
csi->raw_bayer_order = bayer_order;
v4l2_set_subdev_hostdata(sd, (void *)csi);
csi->metadata_format = ATOMISP_INPUT_FORMAT_EMBEDDED;
csi->metadata_effective_width = NULL;
dev_info(&client->dev,
"camera pdata: port: %d lanes: %d order: %8.8x\n",
port, lanes, bayer_order);
} else {
csi = v4l2_get_subdev_hostdata(sd);
kfree(csi);
}
return 0;
}
EXPORT_SYMBOL_GPL(camera_sensor_csi);
/* PCI quirk: The BYT ISP advertises PCI runtime PM but it doesn't
* work. Disable so the kernel framework doesn't hang the device
* trying. The driver itself does direct calls to the PUNIT to manage
* ISP power.
*/
static void isp_pm_cap_fixup(struct pci_dev *dev)
{
dev_info(&dev->dev, "Disabling PCI power management on camera ISP\n");
dev->pm_cap = 0;
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0f38, isp_pm_cap_fixup);
|