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
|
/*
* Copyright (C) ST-Ericsson SA 2010
* adp1653: Driver Adp1653 HPLED flash driver chip. This driver
* currently support I2C interface, 2bit interface is not supported.
* Author: Pankaj Chauhan/pankaj.chauhan@stericsson.com for ST-Ericsson.
* License terms: GNU General Public License (GPL), version 2.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/version.h>
#include <linux/camera_flash.h>
#include <asm/mach-types.h>
#include "flash_common.h"
#include "adp1653.h"
/* This data is platform specific for 8500 href-v1 platform,
* Ideally this should be supplied from platform code
*/
//#define ADAPTER_I2C2 (2)
#define STR_GPIO (6)
static int strobe_gpio = 0; //TODO: set to 0 when it works
static int adapter_i2c2 = 2;
static int flash_irq = 7;
static int enable_gpio = 272;
static int flash_position = 0;
module_param(strobe_gpio, int, S_IRUGO);
MODULE_PARM_DESC(strobe_gpio, "use GPIO 6 to strobe, 0 means that someone else (sensor?) will strobe for us");
module_param(adapter_i2c2, int, S_IRUGO);
MODULE_PARM_DESC(adapter_i2c2, "use the given I2C adaptater to communicate with the chip");
module_param(flash_irq, int, S_IRUGO);
MODULE_PARM_DESC(flash_irq, "the GPIO number associated to the i2c irq line");
module_param(enable_gpio, int, S_IRUGO);
MODULE_PARM_DESC(enable_gpio, "use the given GPIO line to enable the chip");
module_param(flash_position, int, S_IRUGO);
MODULE_PARM_DESC(flash_position, "the position of the flash chip (0=PRIMARY, 1=SECONDARY)");
int __flash_gpio_to_irq(int gpio)
{
return NOMADIK_GPIO_TO_IRQ(gpio);
}
#define DEBUG_LOG(...) printk(KERN_DEBUG "Adp1653 flash driver: " __VA_ARGS__)
#define ADP1653_SUPPORTED_MODES (FLASH_MODE_VIDEO_LED | FLASH_MODE_STILL_LED | \
FLASH_MODE_STILL_LED_EXTERNAL_STROBE | \
FLASH_MODE_AF_ASSISTANT | FLASH_MODE_INDICATOR)
#define ADP1653_SELFTEST_SUPPORTED_MODES (FLASH_SELFTEST_CONNECTION | FLASH_SELFTEST_FLASH_WITH_STROBE | \
FLASH_SELFTEST_VIDEO_LIGHT | FLASH_SELFTEST_AF_LIGHT | FLASH_SELFTEST_INDICATOR | FLASH_SELFTEST_TORCH_LIGHT)
static int adp1653_trigger_strobe(void *priv_data, int enable);
static int adp1653_get_modes(void *priv_data,unsigned long *modes)
{
int err;
struct adp1653_priv_data *priv_p = (struct adp1653_priv_data *)priv_data;
err = i2c_smbus_read_byte_data(priv_p->i2c_client, FAULT_STATUS_REG);
if (err)
*modes = 0x0;
else
*modes = ADP1653_SUPPORTED_MODES;
return 0;
}
static int adp1653_get_mode_details(void *priv_data, unsigned long mode,
struct flash_mode_details *details_p)
{
int err = 0;
memset(details_p,0,sizeof(struct flash_mode_details));
details_p->led_type = 2;
/* Still LED settings*/
details_p->nbFaultRegisters = 1;
if(mode & (FLASH_MODE_STILL_LED | FLASH_MODE_STILL_LED_EXTERNAL_STROBE)){
details_p->max_intensity_uAmp = FLASH_MAX_INTENSITY;
details_p->min_intensity_uAmp = FLASH_MIN_INTENSITY;
details_p->max_strobe_duration_uSecs = FLASH_MAX_STROBE_DURATION;
details_p->feature_bitmap = INTENSITY_PROGRAMMABLE | DURATION_PROGRAMMABLE;
goto out;
}
/*Video LED settings*/
if(mode & FLASH_MODE_VIDEO_LED){
details_p->max_intensity_uAmp = TORCH_MAX_INTENSITY;
details_p->min_intensity_uAmp = TORCH_MIN_INTENSITY;
details_p->max_strobe_duration_uSecs = 0;
details_p->feature_bitmap = INTENSITY_PROGRAMMABLE;
goto out;
}
/*Privacy Indicator settings */
if(mode & FLASH_MODE_INDICATOR){
details_p->max_intensity_uAmp = ILED_MAX_INTENSITY;
details_p->min_intensity_uAmp = ILED_MIN_INTENSITY;
details_p->max_strobe_duration_uSecs = 0;
details_p->feature_bitmap = INTENSITY_PROGRAMMABLE;
goto out;
}
DEBUG_LOG("Mode %lx, not supported\n",mode);
err = EINVAL;
out:
return err;
}
static int adp1653_enable_flash_mode(void *priv_data,
unsigned long mode, int enable)
{
int err = 0;
struct adp1653_priv_data *priv_p = (struct adp1653_priv_data *)priv_data;
if(enable){
if(!(mode & ADP1653_SUPPORTED_MODES)){
DEBUG_LOG("Unsupported mode %lx\n",mode);
err = -EINVAL;
goto out;
}
/*Nothing to be done in enabling, just set current mode and return*/
/*May be enable disable can be done here but why not enable in
*probe and keep it on always
*/
adp1653_trigger_strobe(priv_p,0);
priv_p->curr_mode = mode;
}else{
adp1653_trigger_strobe(priv_p,0);
priv_p->curr_mode =0;
}
out:
return err;
}
static int adp1653_configure_flash_mode(void *priv,unsigned long mode,
struct flash_mode_params *params_p)
{
int err = 0;
unsigned char intensity_code;
struct adp1653_priv_data *priv_p = (struct adp1653_priv_data *)priv;
if(!(mode & ADP1653_SUPPORTED_MODES)){
DEBUG_LOG("Mode %lx not supported\n",mode);
err = -EINVAL;
goto out;
}
switch(mode){
case FLASH_MODE_STILL_LED:
case FLASH_MODE_STILL_LED_EXTERNAL_STROBE:
{
FLASH_UAMP_TO_CODE(intensity_code,params_p->intensity_uAmp);
if(params_p->duration_uSecs){
DURATION_USEC_TO_CODE(priv_p->flash_duration,
params_p->duration_uSecs);
DEBUG_LOG("Duration %lu, code 0x%x\n",params_p->duration_uSecs,
priv_p->flash_duration);
priv_p->flash_duration |= TIMER_ENABLE;
}else{
priv_p->flash_duration = 0;
}
priv_p->flash_intensity = intensity_code << 3;
}
break;
case FLASH_MODE_VIDEO_LED:
{
TORCH_UAMP_TO_CODE(intensity_code,params_p->intensity_uAmp);
DEBUG_LOG("Torch mode setting intensity 0x%x, current(uA) %lu\n",
intensity_code,params_p->intensity_uAmp);
priv_p->torch_intensity = intensity_code << 3;
}
break;
case FLASH_MODE_INDICATOR:
{
ILED_UAMP_TO_CODE(intensity_code,params_p->intensity_uAmp);
DEBUG_LOG("ILED setting intensity 0x%x, current(uA) %lu\n",
intensity_code,params_p->intensity_uAmp);
priv_p->indicator_intensity = intensity_code;
}
break;
default:
err = -EINVAL;
DEBUG_LOG("Unsupported mode %lx\n",mode);
break;
}
if((mode == FLASH_MODE_STILL_LED_EXTERNAL_STROBE) || (mode == FLASH_MODE_STILL_LED))
{
adp1653_trigger_strobe(priv_p,0);
DEBUG_LOG("CONFIG_TIMER_REG : 0x%x\n",priv_p->flash_duration);
DEBUG_LOG("OUTPUT_SEL_REG : 0x%x\n",priv_p->flash_intensity);
/*TimeOut Must be programmed before Intensity*/
err = i2c_smbus_write_byte_data(priv_p->i2c_client,CONFIG_TIMER_REG,
priv_p->flash_duration);
if(err){
DEBUG_LOG("I2C: Unsable to write timer config, err %d\n",err);
goto out;
}
err = i2c_smbus_write_byte_data(priv_p->i2c_client,OUTPUT_SEL_REG,
priv_p->flash_intensity);
if(err){
DEBUG_LOG("I2C: Unable to write OUTPUT_SEL_REG , err %d\n",err);
goto out;
}
}
out:
return err;
}
static int adp1653_set_intensity(struct adp1653_priv_data *priv_p, uint8_t intensity)
{
return i2c_smbus_write_byte_data(priv_p->i2c_client,OUTPUT_SEL_REG,intensity);
}
static int adp1653_strobe_still_led(struct adp1653_priv_data *priv_p,int enable)
{
int err=0,gpio_val;
uint8_t intensity,duration;
if(enable){
intensity = priv_p->flash_intensity;
duration = priv_p->flash_duration;
gpio_val = 1;
}else{
intensity = 0;
duration = 0;
gpio_val = 0;
}
err = adp1653_set_intensity(priv_p,intensity);
if(err){
DEBUG_LOG("I2C: Unable to write OUTPUT_SEL_REG reg, err %d\n",err);
goto out;
}
/*TimeOut Must be programmed before Intensity*/
err = i2c_smbus_write_byte_data(priv_p->i2c_client,CONFIG_TIMER_REG,
priv_p->flash_duration);
if(err){
DEBUG_LOG("I2C: Unsable to write timer config, err %d\n",err);
goto out;
}
err = i2c_smbus_write_byte_data(priv_p->i2c_client,OUTPUT_SEL_REG,intensity);
if(err){
DEBUG_LOG("I2C: Unable to write OUTPUT_SEL_REG, err %d\n",err);
goto out;
}
if (strobe_gpio != 0 )
{
gpio_set_value(priv_p->strobe_gpio,gpio_val);
}
out:
return err;
}
static int adp1653_trigger_strobe(void *priv, int enable)
{
int err = 0;
uint8_t intensity;
struct adp1653_priv_data *priv_p = (struct adp1653_priv_data *)priv;
switch(priv_p->curr_mode){
case FLASH_MODE_STILL_LED:
case FLASH_MODE_STILL_LED_EXTERNAL_STROBE:
err = adp1653_strobe_still_led(priv_p,enable);
break;
case FLASH_MODE_VIDEO_LED:
{
if(enable)
intensity = priv_p->torch_intensity;
else
intensity = 0;
err = adp1653_set_intensity(priv_p,intensity);
}
break;
case FLASH_MODE_INDICATOR:
{
if(enable)
intensity = priv_p->indicator_intensity;
else
intensity =0;
err = adp1653_set_intensity(priv_p,intensity);
}
break;
default:
DEBUG_LOG("Unsupported mode %lx\n",priv_p->curr_mode);
goto out;
}
if(err){
DEBUG_LOG("Unable to enable/disable %d, strobe. Mode %lx, err %d\n",enable,
priv_p->curr_mode,err);
goto out;
}
disable_irq(priv_p->i2c_client->irq);
if(enable)
SET_FLASH_STATUS(priv_p->status,FLASH_STATUS_LIT);
else
CLR_FLASH_STATUS(priv_p->status,FLASH_STATUS_LIT);
enable_irq(priv_p->i2c_client->irq);
out:
return err;
}
#define FLASH_ERR_ALL (FLASH_ERR_OVER_CHARGE |FLASH_ERR_OVER_HEAT | \
FLASH_ERR_SHORT_CIRCUIT | FLASH_ERR_TIMEOUT | \
FLASH_ERR_OVER_VOLTAGE)
int adp1653_get_status(void *priv_data,unsigned long *status)
{
struct adp1653_priv_data *priv_p= (struct adp1653_priv_data *)priv_data;
disable_irq(priv_p->i2c_client->irq);
if(priv_p->fault){
if(priv_p->fault & OVER_VOLTAGE_FAULT)
SET_FLASH_ERROR(priv_p->status,FLASH_ERR_OVER_VOLTAGE);
if(priv_p->fault & TIMEOUT_FAULT)
SET_FLASH_ERROR(priv_p->status,FLASH_ERR_TIMEOUT);
if(priv_p->fault & OVER_TEMPERATURE_FAULT)
SET_FLASH_ERROR(priv_p->status,FLASH_ERR_OVER_HEAT);
if(priv_p->fault & SHORT_CIRCUIT_FAULT){
CLR_FLASH_STATUS(priv_p->status,FLASH_STATUS_READY);
SET_FLASH_STATUS(priv_p->status,FLASH_STATUS_BROKEN);
SET_FLASH_ERROR(priv_p->status,FLASH_ERR_SHORT_CIRCUIT);
}
priv_p->fault =0;
}else{
CLR_FLASH_ERROR(priv_p->status,FLASH_ERR_ALL);
}
enable_irq(priv_p->i2c_client->irq);
*status = priv_p->status;
return 0;
}
int adp1653_get_selftest_modes(void *priv_data, unsigned long *modes)
{
int err;
struct adp1653_priv_data *priv_p = (struct adp1653_priv_data *)priv_data;
err = i2c_smbus_read_byte_data(priv_p->i2c_client, FAULT_STATUS_REG);
if (err) *modes = 0x0;
else *modes = ADP1653_SELFTEST_SUPPORTED_MODES;
return 0;
}
int adp1653_get_fault_registers(void *priv_data, unsigned long mode, unsigned long *status)
{
int err = 0;
struct adp1653_priv_data *priv_p = (struct adp1653_priv_data *)priv_data;
*status = i2c_smbus_read_byte_data(priv_p->i2c_client, FAULT_STATUS_REG);
/* clear fault register */
err = i2c_smbus_write_byte_data(priv_p->i2c_client,OUTPUT_SEL_REG,0);
if(0 != err)
{
DEBUG_LOG("Unable to write OUTPUT_SEL_REG, err %d\n",err);
}
return err;
}
struct flash_chip_ops adp1653_ops = {
.get_modes = adp1653_get_modes,
.get_mode_details = adp1653_get_mode_details,
.get_status = adp1653_get_status,
.enable_flash_mode = adp1653_enable_flash_mode,
.configure_flash_mode = adp1653_configure_flash_mode,
.trigger_strobe = adp1653_trigger_strobe,
.get_selftest_modes = adp1653_get_selftest_modes,
.get_fault_registers = adp1653_get_fault_registers
};
static irqreturn_t adp1653_irq_hdlr(int irq_no,void *data)
{
int err;
struct adp1653_priv_data *priv_p= (struct adp1653_priv_data *)data;
priv_p->fault = i2c_smbus_read_byte_data(priv_p->i2c_client,
FAULT_STATUS_REG);
DEBUG_LOG("Got Fault, status 0x%x\n",priv_p->fault);
/*Writing 0 to OUTPUT_SEL_REG clears the interrtup
*and FAULT_STATUS_REG register
*/
err = i2c_smbus_write_byte_data(priv_p->i2c_client,OUTPUT_SEL_REG,0);
if(err)
DEBUG_LOG("Unable to write OUTPUT_SEL_REG to clr intr, err %d\n",err);
/*TBD: send even to user process*/
return IRQ_HANDLED;
}
static int __devinit adp1653_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int err=0;
struct flash_chip *flash_chip_p=NULL;
struct adp1653_priv_data *priv_p=NULL;
DEBUG_LOG("> adp1653_probe\n");
priv_p = kzalloc(sizeof(struct adp1653_priv_data),GFP_KERNEL);
if(!priv_p){
DEBUG_LOG("Kmalloc failed for priv data\n");
err = ENOMEM;
goto out;
}
priv_p->i2c_client = client;
flash_chip_p = kzalloc(sizeof(struct flash_chip),GFP_KERNEL);
if(!flash_chip_p){
DEBUG_LOG("Kmalloc failed for flash_chip_p");
err = ENOMEM;
goto out;
}
flash_chip_p->priv_data = priv_p;
flash_chip_p->ops = &adp1653_ops;
SET_FLASHCHIP_TYPE(flash_chip_p,FLASH_TYPE_HPLED);
SET_FLASHCHIP_ID(flash_chip_p,ADP1653_ID);
strncpy(flash_chip_p->name,"Adp1653",FLASH_NAME_SIZE);
i2c_set_clientdata(client,priv_p);
/*Request GPIO and Register IRQ if supported by platform and flash chip*/
if(machine_is_hrefv60())
enable_gpio = 21;
else
enable_gpio = 272;
if(enable_gpio){
err = gpio_request(enable_gpio,"Camera LED flash Enable");
if(err){
DEBUG_LOG("Unable to get GPIO %d, for enable\n",enable_gpio);
goto out;
}
priv_p->enable_gpio = enable_gpio;
err = gpio_direction_output(priv_p->enable_gpio, 1);
if(err){
DEBUG_LOG("Unable to set GPIO %lu in output mode, err %d\n",priv_p->enable_gpio,err);
gpio_free(priv_p->enable_gpio);
goto out;
}
gpio_set_value(priv_p->enable_gpio, 1);
}
if (strobe_gpio != 0)
{
err = gpio_request(STR_GPIO,"Camera flash strobe\n");
if(err){
DEBUG_LOG("Unable to request strobe GPIO\n");
// somebody else requested this gpio ...
//goto out;
}
err = gpio_direction_output(STR_GPIO, 0);
if(err){
DEBUG_LOG("Unable to set GPIO %d in output mode, err %d\n",STR_GPIO,err);
goto out;
}
}
else
{
err = gpio_request(STR_GPIO,"Camera flash strobe\n");
if(err){
DEBUG_LOG("Unable to request strobe GPIO\n");
// somebody else requested this gpio ...
//goto out;
}
err = gpio_direction_input(STR_GPIO);
if(err){
DEBUG_LOG("Unable to set GPIO %d in input mode, err %d\n",STR_GPIO,err);
goto out;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
err = nmk_gpio_set_pull(STR_GPIO, NMK_GPIO_PULL_DOWN);
#endif
if(err){
DEBUG_LOG("Unable to set pull down on GPIO %d\n",STR_GPIO);
goto out;
}
}
priv_p->strobe_gpio = STR_GPIO;
if(client->irq){
err = request_threaded_irq(client->irq,NULL,adp1653_irq_hdlr,
IRQF_ONESHOT|IRQF_TRIGGER_FALLING,
"Adp1653 flash",priv_p);
if(err){
DEBUG_LOG("Unable to register flash IRQ handler, irq %d, err %d\n",
client->irq,err);
goto out;
}
}
err = register_flash_chip(flash_position,flash_chip_p);
if(err){
DEBUG_LOG("Failed to register Adp1653 as flash for %s camera\n",
(flash_position?"Primary":"Secondary"));
goto out;
}
SET_FLASH_STATUS(priv_p->status,FLASH_STATUS_READY);
DEBUG_LOG("< adp1653_probe ok\n");
return err;
out:
if(priv_p->irq_no)
free_irq(priv_p->irq_no,NULL);
if(priv_p->enable_gpio)
gpio_free(priv_p->enable_gpio);
if(priv_p)
kfree(priv_p);
if(flash_chip_p)
kfree(flash_chip_p);
DEBUG_LOG("< adp1653_probe (%d)\n", err);
return err;
}
static int __devexit adp1653_remove(struct i2c_client *client)
{
int err=0;
/*Nothing here yet, implement it later.*/
return err;
}
static const struct i2c_device_id adp1653_id[] = {
{ "adp1653", 0},
{}
};
static struct i2c_driver adp1653_i2c_driver = {
.driver = {
.name = "adp1653",
.owner = THIS_MODULE,
},
.probe = adp1653_probe,
.remove = __devexit_p(adp1653_remove),
.id_table = adp1653_id,
};
int adp1653_init(void){
int err=0;
struct i2c_adapter *adap_p;
struct i2c_board_info info;
/*Registration of I2C flash device is platform specific code
*Ideally it should be done from kernel (arch/arm/mach-XXX).
*Do it locally till the time it gets into platform code
*OR This portion (registration of device) and flash chip init
*Routine can be moved to Flash chip module init.
*/
DEBUG_LOG("getting I2C adaptor %d\n",adapter_i2c2);
adap_p = i2c_get_adapter(adapter_i2c2);
if(!adap_p){
DEBUG_LOG("Unable to get I2C adaptor\n");
goto out;
}
memset(&info,0,sizeof( struct i2c_board_info));
info.irq = __flash_gpio_to_irq(flash_irq);
strcpy(&info.type[0],"adp1653");
DEBUG_LOG("trying to register %s at position %d, GPIO enable %d, GPIO IRQ line %d\n",
info.type,
flash_position,
enable_gpio,
flash_irq);
/* I2C framework expects least significant 7 bits as address, not complete
* 8 bits with bit 0 (read/write bit)
*/
info.addr = 0x60 >> 1;
err = i2c_add_driver(&adp1653_i2c_driver);
if(err)
{
DEBUG_LOG("Failed to register i2c driver\n");
goto out;
}
DEBUG_LOG("Initialized adp1653\n");
if(!i2c_new_device(adap_p,&info)){
DEBUG_LOG("Unable to add i2c dev: %s (err=%d)\n",info.type, err);
goto out;
}
out:
return err;
}
/*
MODULE_DEPEND
*/
|