power: tps80031: battery-gauge: register as mfd sub device
[linux-2.6.git] / drivers / mfd / ab8500-debugfs.c
1 /*
2  * Copyright (C) ST-Ericsson SA 2010
3  *
4  * Author: Mattias Wallin <mattias.wallin@stericsson.com> for ST-Ericsson.
5  * License Terms: GNU General Public License v2
6  */
7
8 #include <linux/seq_file.h>
9 #include <linux/uaccess.h>
10 #include <linux/fs.h>
11 #include <linux/debugfs.h>
12 #include <linux/platform_device.h>
13
14 #include <linux/mfd/abx500.h>
15 #include <linux/mfd/ab8500.h>
16
17 static u32 debug_bank;
18 static u32 debug_address;
19
20 /**
21  * struct ab8500_reg_range
22  * @first: the first address of the range
23  * @last: the last address of the range
24  * @perm: access permissions for the range
25  */
26 struct ab8500_reg_range {
27         u8 first;
28         u8 last;
29         u8 perm;
30 };
31
32 /**
33  * struct ab8500_i2c_ranges
34  * @num_ranges: the number of ranges in the list
35  * @bankid: bank identifier
36  * @range: the list of register ranges
37  */
38 struct ab8500_i2c_ranges {
39         u8 num_ranges;
40         u8 bankid;
41         const struct ab8500_reg_range *range;
42 };
43
44 #define AB8500_NAME_STRING "ab8500"
45 #define AB8500_NUM_BANKS 22
46
47 #define AB8500_REV_REG 0x80
48
49 static struct ab8500_i2c_ranges debug_ranges[AB8500_NUM_BANKS] = {
50         [0x0] = {
51                 .num_ranges = 0,
52                 .range = 0,
53         },
54         [AB8500_SYS_CTRL1_BLOCK] = {
55                 .num_ranges = 3,
56                 .range = (struct ab8500_reg_range[]) {
57                         {
58                                 .first = 0x00,
59                                 .last = 0x02,
60                         },
61                         {
62                                 .first = 0x42,
63                                 .last = 0x42,
64                         },
65                         {
66                                 .first = 0x80,
67                                 .last = 0x81,
68                         },
69                 },
70         },
71         [AB8500_SYS_CTRL2_BLOCK] = {
72                 .num_ranges = 4,
73                 .range = (struct ab8500_reg_range[]) {
74                         {
75                                 .first = 0x00,
76                                 .last = 0x0D,
77                         },
78                         {
79                                 .first = 0x0F,
80                                 .last = 0x17,
81                         },
82                         {
83                                 .first = 0x30,
84                                 .last = 0x30,
85                         },
86                         {
87                                 .first = 0x32,
88                                 .last = 0x33,
89                         },
90                 },
91         },
92         [AB8500_REGU_CTRL1] = {
93                 .num_ranges = 3,
94                 .range = (struct ab8500_reg_range[]) {
95                         {
96                                 .first = 0x00,
97                                 .last = 0x00,
98                         },
99                         {
100                                 .first = 0x03,
101                                 .last = 0x10,
102                         },
103                         {
104                                 .first = 0x80,
105                                 .last = 0x84,
106                         },
107                 },
108         },
109         [AB8500_REGU_CTRL2] = {
110                 .num_ranges = 5,
111                 .range = (struct ab8500_reg_range[]) {
112                         {
113                                 .first = 0x00,
114                                 .last = 0x15,
115                         },
116                         {
117                                 .first = 0x17,
118                                 .last = 0x19,
119                         },
120                         {
121                                 .first = 0x1B,
122                                 .last = 0x1D,
123                         },
124                         {
125                                 .first = 0x1F,
126                                 .last = 0x22,
127                         },
128                         {
129                                 .first = 0x40,
130                                 .last = 0x44,
131                         },
132                         /* 0x80-0x8B is SIM registers and should
133                          * not be accessed from here */
134                 },
135         },
136         [AB8500_USB] = {
137                 .num_ranges = 2,
138                 .range = (struct ab8500_reg_range[]) {
139                         {
140                                 .first = 0x80,
141                                 .last = 0x83,
142                         },
143                         {
144                                 .first = 0x87,
145                                 .last = 0x8A,
146                         },
147                 },
148         },
149         [AB8500_TVOUT] = {
150                 .num_ranges = 9,
151                 .range = (struct ab8500_reg_range[]) {
152                         {
153                                 .first = 0x00,
154                                 .last = 0x12,
155                         },
156                         {
157                                 .first = 0x15,
158                                 .last = 0x17,
159                         },
160                         {
161                                 .first = 0x19,
162                                 .last = 0x21,
163                         },
164                         {
165                                 .first = 0x27,
166                                 .last = 0x2C,
167                         },
168                         {
169                                 .first = 0x41,
170                                 .last = 0x41,
171                         },
172                         {
173                                 .first = 0x45,
174                                 .last = 0x5B,
175                         },
176                         {
177                                 .first = 0x5D,
178                                 .last = 0x5D,
179                         },
180                         {
181                                 .first = 0x69,
182                                 .last = 0x69,
183                         },
184                         {
185                                 .first = 0x80,
186                                 .last = 0x81,
187                         },
188                 },
189         },
190         [AB8500_DBI] = {
191                 .num_ranges = 0,
192                 .range = NULL,
193         },
194         [AB8500_ECI_AV_ACC] = {
195                 .num_ranges = 1,
196                 .range = (struct ab8500_reg_range[]) {
197                         {
198                                 .first = 0x80,
199                                 .last = 0x82,
200                         },
201                 },
202         },
203         [0x9] = {
204                 .num_ranges = 0,
205                 .range = NULL,
206         },
207         [AB8500_GPADC] = {
208                 .num_ranges = 1,
209                 .range = (struct ab8500_reg_range[]) {
210                         {
211                                 .first = 0x00,
212                                 .last = 0x08,
213                         },
214                 },
215         },
216         [AB8500_CHARGER] = {
217                 .num_ranges = 8,
218                 .range = (struct ab8500_reg_range[]) {
219                         {
220                                 .first = 0x00,
221                                 .last = 0x03,
222                         },
223                         {
224                                 .first = 0x05,
225                                 .last = 0x05,
226                         },
227                         {
228                                 .first = 0x40,
229                                 .last = 0x40,
230                         },
231                         {
232                                 .first = 0x42,
233                                 .last = 0x42,
234                         },
235                         {
236                                 .first = 0x44,
237                                 .last = 0x44,
238                         },
239                         {
240                                 .first = 0x50,
241                                 .last = 0x55,
242                         },
243                         {
244                                 .first = 0x80,
245                                 .last = 0x82,
246                         },
247                         {
248                                 .first = 0xC0,
249                                 .last = 0xC2,
250                         },
251                 },
252         },
253         [AB8500_GAS_GAUGE] = {
254                 .num_ranges = 3,
255                 .range = (struct ab8500_reg_range[]) {
256                         {
257                                 .first = 0x00,
258                                 .last = 0x00,
259                         },
260                         {
261                                 .first = 0x07,
262                                 .last = 0x0A,
263                         },
264                         {
265                                 .first = 0x10,
266                                 .last = 0x14,
267                         },
268                 },
269         },
270         [AB8500_AUDIO] = {
271                 .num_ranges = 1,
272                 .range = (struct ab8500_reg_range[]) {
273                         {
274                                 .first = 0x00,
275                                 .last = 0x6F,
276                         },
277                 },
278         },
279         [AB8500_INTERRUPT] = {
280                 .num_ranges = 0,
281                 .range = NULL,
282         },
283         [AB8500_RTC] = {
284                 .num_ranges = 1,
285                 .range = (struct ab8500_reg_range[]) {
286                         {
287                                 .first = 0x00,
288                                 .last = 0x0F,
289                         },
290                 },
291         },
292         [AB8500_MISC] = {
293                 .num_ranges = 8,
294                 .range = (struct ab8500_reg_range[]) {
295                         {
296                                 .first = 0x00,
297                                 .last = 0x05,
298                         },
299                         {
300                                 .first = 0x10,
301                                 .last = 0x15,
302                         },
303                         {
304                                 .first = 0x20,
305                                 .last = 0x25,
306                         },
307                         {
308                                 .first = 0x30,
309                                 .last = 0x35,
310                         },
311                         {
312                                 .first = 0x40,
313                                 .last = 0x45,
314                         },
315                         {
316                                 .first = 0x50,
317                                 .last = 0x50,
318                         },
319                         {
320                                 .first = 0x60,
321                                 .last = 0x67,
322                         },
323                         {
324                                 .first = 0x80,
325                                 .last = 0x80,
326                         },
327                 },
328         },
329         [0x11] = {
330                 .num_ranges = 0,
331                 .range = NULL,
332         },
333         [0x12] = {
334                 .num_ranges = 0,
335                 .range = NULL,
336         },
337         [0x13] = {
338                 .num_ranges = 0,
339                 .range = NULL,
340         },
341         [0x14] = {
342                 .num_ranges = 0,
343                 .range = NULL,
344         },
345         [AB8500_OTP_EMUL] = {
346                 .num_ranges = 1,
347                 .range = (struct ab8500_reg_range[]) {
348                         {
349                                 .first = 0x01,
350                                 .last = 0x0F,
351                         },
352                 },
353         },
354 };
355
356 static int ab8500_registers_print(struct seq_file *s, void *p)
357 {
358         struct device *dev = s->private;
359         unsigned int i;
360         u32 bank = debug_bank;
361
362         seq_printf(s, AB8500_NAME_STRING " register values:\n");
363
364         seq_printf(s, " bank %u:\n", bank);
365         for (i = 0; i < debug_ranges[bank].num_ranges; i++) {
366                 u32 reg;
367
368                 for (reg = debug_ranges[bank].range[i].first;
369                         reg <= debug_ranges[bank].range[i].last;
370                         reg++) {
371                         u8 value;
372                         int err;
373
374                         err = abx500_get_register_interruptible(dev,
375                                 (u8)bank, (u8)reg, &value);
376                         if (err < 0) {
377                                 dev_err(dev, "ab->read fail %d\n", err);
378                                 return err;
379                         }
380
381                         err = seq_printf(s, "  [%u/0x%02X]: 0x%02X\n", bank,
382                                 reg, value);
383                         if (err < 0) {
384                                 dev_err(dev, "seq_printf overflow\n");
385                                 /* Error is not returned here since
386                                  * the output is wanted in any case */
387                                 return 0;
388                         }
389                 }
390         }
391         return 0;
392 }
393
394 static int ab8500_registers_open(struct inode *inode, struct file *file)
395 {
396         return single_open(file, ab8500_registers_print, inode->i_private);
397 }
398
399 static const struct file_operations ab8500_registers_fops = {
400         .open = ab8500_registers_open,
401         .read = seq_read,
402         .llseek = seq_lseek,
403         .release = single_release,
404         .owner = THIS_MODULE,
405 };
406
407 static int ab8500_bank_print(struct seq_file *s, void *p)
408 {
409         return seq_printf(s, "%d\n", debug_bank);
410 }
411
412 static int ab8500_bank_open(struct inode *inode, struct file *file)
413 {
414         return single_open(file, ab8500_bank_print, inode->i_private);
415 }
416
417 static ssize_t ab8500_bank_write(struct file *file,
418         const char __user *user_buf,
419         size_t count, loff_t *ppos)
420 {
421         struct device *dev = ((struct seq_file *)(file->private_data))->private;
422         unsigned long user_bank;
423         int err;
424
425         /* Get userspace string and assure termination */
426         err = kstrtoul_from_user(user_buf, count, 0, &user_bank);
427         if (err)
428                 return err;
429
430         if (user_bank >= AB8500_NUM_BANKS) {
431                 dev_err(dev, "debugfs error input > number of banks\n");
432                 return -EINVAL;
433         }
434
435         debug_bank = user_bank;
436
437         return count;
438 }
439
440 static int ab8500_address_print(struct seq_file *s, void *p)
441 {
442         return seq_printf(s, "0x%02X\n", debug_address);
443 }
444
445 static int ab8500_address_open(struct inode *inode, struct file *file)
446 {
447         return single_open(file, ab8500_address_print, inode->i_private);
448 }
449
450 static ssize_t ab8500_address_write(struct file *file,
451         const char __user *user_buf,
452         size_t count, loff_t *ppos)
453 {
454         struct device *dev = ((struct seq_file *)(file->private_data))->private;
455         unsigned long user_address;
456         int err;
457
458         /* Get userspace string and assure termination */
459         err = kstrtoul_from_user(user_buf, count, 0, &user_address);
460         if (err)
461                 return err;
462
463         if (user_address > 0xff) {
464                 dev_err(dev, "debugfs error input > 0xff\n");
465                 return -EINVAL;
466         }
467         debug_address = user_address;
468         return count;
469 }
470
471 static int ab8500_val_print(struct seq_file *s, void *p)
472 {
473         struct device *dev = s->private;
474         int ret;
475         u8 regvalue;
476
477         ret = abx500_get_register_interruptible(dev,
478                 (u8)debug_bank, (u8)debug_address, &regvalue);
479         if (ret < 0) {
480                 dev_err(dev, "abx500_get_reg fail %d, %d\n",
481                         ret, __LINE__);
482                 return -EINVAL;
483         }
484         seq_printf(s, "0x%02X\n", regvalue);
485
486         return 0;
487 }
488
489 static int ab8500_val_open(struct inode *inode, struct file *file)
490 {
491         return single_open(file, ab8500_val_print, inode->i_private);
492 }
493
494 static ssize_t ab8500_val_write(struct file *file,
495         const char __user *user_buf,
496         size_t count, loff_t *ppos)
497 {
498         struct device *dev = ((struct seq_file *)(file->private_data))->private;
499         unsigned long user_val;
500         int err;
501
502         /* Get userspace string and assure termination */
503         err = kstrtoul_from_user(user_buf, count, 0, &user_val);
504         if (err)
505                 return err;
506
507         if (user_val > 0xff) {
508                 dev_err(dev, "debugfs error input > 0xff\n");
509                 return -EINVAL;
510         }
511         err = abx500_set_register_interruptible(dev,
512                 (u8)debug_bank, debug_address, (u8)user_val);
513         if (err < 0) {
514                 printk(KERN_ERR "abx500_set_reg failed %d, %d", err, __LINE__);
515                 return -EINVAL;
516         }
517
518         return count;
519 }
520
521 static const struct file_operations ab8500_bank_fops = {
522         .open = ab8500_bank_open,
523         .write = ab8500_bank_write,
524         .read = seq_read,
525         .llseek = seq_lseek,
526         .release = single_release,
527         .owner = THIS_MODULE,
528 };
529
530 static const struct file_operations ab8500_address_fops = {
531         .open = ab8500_address_open,
532         .write = ab8500_address_write,
533         .read = seq_read,
534         .llseek = seq_lseek,
535         .release = single_release,
536         .owner = THIS_MODULE,
537 };
538
539 static const struct file_operations ab8500_val_fops = {
540         .open = ab8500_val_open,
541         .write = ab8500_val_write,
542         .read = seq_read,
543         .llseek = seq_lseek,
544         .release = single_release,
545         .owner = THIS_MODULE,
546 };
547
548 static struct dentry *ab8500_dir;
549 static struct dentry *ab8500_reg_file;
550 static struct dentry *ab8500_bank_file;
551 static struct dentry *ab8500_address_file;
552 static struct dentry *ab8500_val_file;
553
554 static int __devinit ab8500_debug_probe(struct platform_device *plf)
555 {
556         debug_bank = AB8500_MISC;
557         debug_address = AB8500_REV_REG & 0x00FF;
558
559         ab8500_dir = debugfs_create_dir(AB8500_NAME_STRING, NULL);
560         if (!ab8500_dir)
561                 goto exit_no_debugfs;
562
563         ab8500_reg_file = debugfs_create_file("all-bank-registers",
564                 S_IRUGO, ab8500_dir, &plf->dev, &ab8500_registers_fops);
565         if (!ab8500_reg_file)
566                 goto exit_destroy_dir;
567
568         ab8500_bank_file = debugfs_create_file("register-bank",
569                 (S_IRUGO | S_IWUSR), ab8500_dir, &plf->dev, &ab8500_bank_fops);
570         if (!ab8500_bank_file)
571                 goto exit_destroy_reg;
572
573         ab8500_address_file = debugfs_create_file("register-address",
574                 (S_IRUGO | S_IWUSR), ab8500_dir, &plf->dev,
575                 &ab8500_address_fops);
576         if (!ab8500_address_file)
577                 goto exit_destroy_bank;
578
579         ab8500_val_file = debugfs_create_file("register-value",
580                 (S_IRUGO | S_IWUSR), ab8500_dir, &plf->dev, &ab8500_val_fops);
581         if (!ab8500_val_file)
582                 goto exit_destroy_address;
583
584         return 0;
585
586 exit_destroy_address:
587         debugfs_remove(ab8500_address_file);
588 exit_destroy_bank:
589         debugfs_remove(ab8500_bank_file);
590 exit_destroy_reg:
591         debugfs_remove(ab8500_reg_file);
592 exit_destroy_dir:
593         debugfs_remove(ab8500_dir);
594 exit_no_debugfs:
595         dev_err(&plf->dev, "failed to create debugfs entries.\n");
596         return -ENOMEM;
597 }
598
599 static int __devexit ab8500_debug_remove(struct platform_device *plf)
600 {
601         debugfs_remove(ab8500_val_file);
602         debugfs_remove(ab8500_address_file);
603         debugfs_remove(ab8500_bank_file);
604         debugfs_remove(ab8500_reg_file);
605         debugfs_remove(ab8500_dir);
606
607         return 0;
608 }
609
610 static struct platform_driver ab8500_debug_driver = {
611         .driver = {
612                 .name = "ab8500-debug",
613                 .owner = THIS_MODULE,
614         },
615         .probe  = ab8500_debug_probe,
616         .remove = __devexit_p(ab8500_debug_remove)
617 };
618
619 static int __init ab8500_debug_init(void)
620 {
621         return platform_driver_register(&ab8500_debug_driver);
622 }
623
624 static void __exit ab8500_debug_exit(void)
625 {
626         platform_driver_unregister(&ab8500_debug_driver);
627 }
628 subsys_initcall(ab8500_debug_init);
629 module_exit(ab8500_debug_exit);
630
631 MODULE_AUTHOR("Mattias WALLIN <mattias.wallin@stericsson.com");
632 MODULE_DESCRIPTION("AB8500 DEBUG");
633 MODULE_LICENSE("GPL v2");