headers: remove sched.h from poll.h
[linux-2.6.git] / drivers / mfd / ab3100-core.c
1 /*
2  * Copyright (C) 2007-2009 ST-Ericsson
3  * License terms: GNU General Public License (GPL) version 2
4  * Low-level core for exclusive access to the AB3100 IC on the I2C bus
5  * and some basic chip-configuration.
6  * Author: Linus Walleij <linus.walleij@stericsson.com>
7  */
8
9 #include <linux/i2c.h>
10 #include <linux/mutex.h>
11 #include <linux/list.h>
12 #include <linux/notifier.h>
13 #include <linux/err.h>
14 #include <linux/platform_device.h>
15 #include <linux/device.h>
16 #include <linux/interrupt.h>
17 #include <linux/debugfs.h>
18 #include <linux/seq_file.h>
19 #include <linux/uaccess.h>
20 #include <linux/mfd/ab3100.h>
21
22 /* These are the only registers inside AB3100 used in this main file */
23
24 /* Interrupt event registers */
25 #define AB3100_EVENTA1          0x21
26 #define AB3100_EVENTA2          0x22
27 #define AB3100_EVENTA3          0x23
28
29 /* AB3100 DAC converter registers */
30 #define AB3100_DIS              0x00
31 #define AB3100_D0C              0x01
32 #define AB3100_D1C              0x02
33 #define AB3100_D2C              0x03
34 #define AB3100_D3C              0x04
35
36 /* Chip ID register */
37 #define AB3100_CID              0x20
38
39 /* AB3100 interrupt registers */
40 #define AB3100_IMRA1            0x24
41 #define AB3100_IMRA2            0x25
42 #define AB3100_IMRA3            0x26
43 #define AB3100_IMRB1            0x2B
44 #define AB3100_IMRB2            0x2C
45 #define AB3100_IMRB3            0x2D
46
47 /* System Power Monitoring and control registers */
48 #define AB3100_MCA              0x2E
49 #define AB3100_MCB              0x2F
50
51 /* SIM power up */
52 #define AB3100_SUP              0x50
53
54 /*
55  * I2C communication
56  *
57  * The AB3100 is usually assigned address 0x48 (7-bit)
58  * The chip is defined in the platform i2c_board_data section.
59  */
60
61 u8 ab3100_get_chip_type(struct ab3100 *ab3100)
62 {
63         u8 chip = ABUNKNOWN;
64
65         switch (ab3100->chip_id & 0xf0) {
66         case  0xa0:
67                 chip = AB3000;
68                 break;
69         case  0xc0:
70                 chip = AB3100;
71                 break;
72         }
73         return chip;
74 }
75 EXPORT_SYMBOL(ab3100_get_chip_type);
76
77 int ab3100_set_register_interruptible(struct ab3100 *ab3100, u8 reg, u8 regval)
78 {
79         u8 regandval[2] = {reg, regval};
80         int err;
81
82         err = mutex_lock_interruptible(&ab3100->access_mutex);
83         if (err)
84                 return err;
85
86         /*
87          * A two-byte write message with the first byte containing the register
88          * number and the second byte containing the value to be written
89          * effectively sets a register in the AB3100.
90          */
91         err = i2c_master_send(ab3100->i2c_client, regandval, 2);
92         if (err < 0) {
93                 dev_err(ab3100->dev,
94                         "write error (write register): %d\n",
95                         err);
96         } else if (err != 2) {
97                 dev_err(ab3100->dev,
98                         "write error (write register) "
99                         "%d bytes transferred (expected 2)\n",
100                         err);
101                 err = -EIO;
102         } else {
103                 /* All is well */
104                 err = 0;
105         }
106         mutex_unlock(&ab3100->access_mutex);
107         return err;
108 }
109 EXPORT_SYMBOL(ab3100_set_register_interruptible);
110
111
112 /*
113  * The test registers exist at an I2C bus address up one
114  * from the ordinary base. They are not supposed to be used
115  * in production code, but sometimes you have to do that
116  * anyway. It's currently only used from this file so declare
117  * it static and do not export.
118  */
119 static int ab3100_set_test_register_interruptible(struct ab3100 *ab3100,
120                                     u8 reg, u8 regval)
121 {
122         u8 regandval[2] = {reg, regval};
123         int err;
124
125         err = mutex_lock_interruptible(&ab3100->access_mutex);
126         if (err)
127                 return err;
128
129         err = i2c_master_send(ab3100->testreg_client, regandval, 2);
130         if (err < 0) {
131                 dev_err(ab3100->dev,
132                         "write error (write test register): %d\n",
133                         err);
134         } else if (err != 2) {
135                 dev_err(ab3100->dev,
136                         "write error (write test register) "
137                         "%d bytes transferred (expected 2)\n",
138                         err);
139                 err = -EIO;
140         } else {
141                 /* All is well */
142                 err = 0;
143         }
144         mutex_unlock(&ab3100->access_mutex);
145
146         return err;
147 }
148
149
150 int ab3100_get_register_interruptible(struct ab3100 *ab3100, u8 reg, u8 *regval)
151 {
152         int err;
153
154         err = mutex_lock_interruptible(&ab3100->access_mutex);
155         if (err)
156                 return err;
157
158         /*
159          * AB3100 require an I2C "stop" command between each message, else
160          * it will not work. The only way of achieveing this with the
161          * message transport layer is to send the read and write messages
162          * separately.
163          */
164         err = i2c_master_send(ab3100->i2c_client, &reg, 1);
165         if (err < 0) {
166                 dev_err(ab3100->dev,
167                         "write error (send register address): %d\n",
168                         err);
169                 goto get_reg_out_unlock;
170         } else if (err != 1) {
171                 dev_err(ab3100->dev,
172                         "write error (send register address) "
173                         "%d bytes transferred (expected 1)\n",
174                         err);
175                 err = -EIO;
176                 goto get_reg_out_unlock;
177         } else {
178                 /* All is well */
179                 err = 0;
180         }
181
182         err = i2c_master_recv(ab3100->i2c_client, regval, 1);
183         if (err < 0) {
184                 dev_err(ab3100->dev,
185                         "write error (read register): %d\n",
186                         err);
187                 goto get_reg_out_unlock;
188         } else if (err != 1) {
189                 dev_err(ab3100->dev,
190                         "write error (read register) "
191                         "%d bytes transferred (expected 1)\n",
192                         err);
193                 err = -EIO;
194                 goto get_reg_out_unlock;
195         } else {
196                 /* All is well */
197                 err = 0;
198         }
199
200  get_reg_out_unlock:
201         mutex_unlock(&ab3100->access_mutex);
202         return err;
203 }
204 EXPORT_SYMBOL(ab3100_get_register_interruptible);
205
206
207 int ab3100_get_register_page_interruptible(struct ab3100 *ab3100,
208                              u8 first_reg, u8 *regvals, u8 numregs)
209 {
210         int err;
211
212         if (ab3100->chip_id == 0xa0 ||
213             ab3100->chip_id == 0xa1)
214                 /* These don't support paged reads */
215                 return -EIO;
216
217         err = mutex_lock_interruptible(&ab3100->access_mutex);
218         if (err)
219                 return err;
220
221         /*
222          * Paged read also require an I2C "stop" command.
223          */
224         err = i2c_master_send(ab3100->i2c_client, &first_reg, 1);
225         if (err < 0) {
226                 dev_err(ab3100->dev,
227                         "write error (send first register address): %d\n",
228                         err);
229                 goto get_reg_page_out_unlock;
230         } else if (err != 1) {
231                 dev_err(ab3100->dev,
232                         "write error (send first register address) "
233                         "%d bytes transferred (expected 1)\n",
234                         err);
235                 err = -EIO;
236                 goto get_reg_page_out_unlock;
237         }
238
239         err = i2c_master_recv(ab3100->i2c_client, regvals, numregs);
240         if (err < 0) {
241                 dev_err(ab3100->dev,
242                         "write error (read register page): %d\n",
243                         err);
244                 goto get_reg_page_out_unlock;
245         } else if (err != numregs) {
246                 dev_err(ab3100->dev,
247                         "write error (read register page) "
248                         "%d bytes transferred (expected %d)\n",
249                         err, numregs);
250                 err = -EIO;
251                 goto get_reg_page_out_unlock;
252         }
253
254         /* All is well */
255         err = 0;
256
257  get_reg_page_out_unlock:
258         mutex_unlock(&ab3100->access_mutex);
259         return err;
260 }
261 EXPORT_SYMBOL(ab3100_get_register_page_interruptible);
262
263
264 int ab3100_mask_and_set_register_interruptible(struct ab3100 *ab3100,
265                                  u8 reg, u8 andmask, u8 ormask)
266 {
267         u8 regandval[2] = {reg, 0};
268         int err;
269
270         err = mutex_lock_interruptible(&ab3100->access_mutex);
271         if (err)
272                 return err;
273
274         /* First read out the target register */
275         err = i2c_master_send(ab3100->i2c_client, &reg, 1);
276         if (err < 0) {
277                 dev_err(ab3100->dev,
278                         "write error (maskset send address): %d\n",
279                         err);
280                 goto get_maskset_unlock;
281         } else if (err != 1) {
282                 dev_err(ab3100->dev,
283                         "write error (maskset send address) "
284                         "%d bytes transferred (expected 1)\n",
285                         err);
286                 err = -EIO;
287                 goto get_maskset_unlock;
288         }
289
290         err = i2c_master_recv(ab3100->i2c_client, &regandval[1], 1);
291         if (err < 0) {
292                 dev_err(ab3100->dev,
293                         "write error (maskset read register): %d\n",
294                         err);
295                 goto get_maskset_unlock;
296         } else if (err != 1) {
297                 dev_err(ab3100->dev,
298                         "write error (maskset read register) "
299                         "%d bytes transferred (expected 1)\n",
300                         err);
301                 err = -EIO;
302                 goto get_maskset_unlock;
303         }
304
305         /* Modify the register */
306         regandval[1] &= andmask;
307         regandval[1] |= ormask;
308
309         /* Write the register */
310         err = i2c_master_send(ab3100->i2c_client, regandval, 2);
311         if (err < 0) {
312                 dev_err(ab3100->dev,
313                         "write error (write register): %d\n",
314                         err);
315                 goto get_maskset_unlock;
316         } else if (err != 2) {
317                 dev_err(ab3100->dev,
318                         "write error (write register) "
319                         "%d bytes transferred (expected 2)\n",
320                         err);
321                 err = -EIO;
322                 goto get_maskset_unlock;
323         }
324
325         /* All is well */
326         err = 0;
327
328  get_maskset_unlock:
329         mutex_unlock(&ab3100->access_mutex);
330         return err;
331 }
332 EXPORT_SYMBOL(ab3100_mask_and_set_register_interruptible);
333
334
335 /*
336  * Register a simple callback for handling any AB3100 events.
337  */
338 int ab3100_event_register(struct ab3100 *ab3100,
339                           struct notifier_block *nb)
340 {
341         return blocking_notifier_chain_register(&ab3100->event_subscribers,
342                                                nb);
343 }
344 EXPORT_SYMBOL(ab3100_event_register);
345
346 /*
347  * Remove a previously registered callback.
348  */
349 int ab3100_event_unregister(struct ab3100 *ab3100,
350                             struct notifier_block *nb)
351 {
352   return blocking_notifier_chain_unregister(&ab3100->event_subscribers,
353                                             nb);
354 }
355 EXPORT_SYMBOL(ab3100_event_unregister);
356
357
358 int ab3100_event_registers_startup_state_get(struct ab3100 *ab3100,
359                                              u32 *fatevent)
360 {
361         if (!ab3100->startup_events_read)
362                 return -EAGAIN; /* Try again later */
363         *fatevent = ab3100->startup_events;
364         return 0;
365 }
366 EXPORT_SYMBOL(ab3100_event_registers_startup_state_get);
367
368 /* Interrupt handling worker */
369 static void ab3100_work(struct work_struct *work)
370 {
371         struct ab3100 *ab3100 = container_of(work, struct ab3100, work);
372         u8 event_regs[3];
373         u32 fatevent;
374         int err;
375
376         err = ab3100_get_register_page_interruptible(ab3100, AB3100_EVENTA1,
377                                        event_regs, 3);
378         if (err)
379                 goto err_event_wq;
380
381         fatevent = (event_regs[0] << 16) |
382                 (event_regs[1] << 8) |
383                 event_regs[2];
384
385         if (!ab3100->startup_events_read) {
386                 ab3100->startup_events = fatevent;
387                 ab3100->startup_events_read = true;
388         }
389         /*
390          * The notified parties will have to mask out the events
391          * they're interested in and react to them. They will be
392          * notified on all events, then they use the fatevent value
393          * to determine if they're interested.
394          */
395         blocking_notifier_call_chain(&ab3100->event_subscribers,
396                                      fatevent, NULL);
397
398         dev_dbg(ab3100->dev,
399                 "IRQ Event: 0x%08x\n", fatevent);
400
401         /* By now the IRQ should be acked and deasserted so enable it again */
402         enable_irq(ab3100->i2c_client->irq);
403         return;
404
405  err_event_wq:
406         dev_dbg(ab3100->dev,
407                 "error in event workqueue\n");
408         /* Enable the IRQ anyway, what choice do we have? */
409         enable_irq(ab3100->i2c_client->irq);
410         return;
411 }
412
413 static irqreturn_t ab3100_irq_handler(int irq, void *data)
414 {
415         struct ab3100 *ab3100 = data;
416         /*
417          * Disable the IRQ and dispatch a worker to handle the
418          * event. Since the chip resides on I2C this is slow
419          * stuff and we will re-enable the interrupts once th
420          * worker has finished.
421          */
422         disable_irq_nosync(irq);
423         schedule_work(&ab3100->work);
424         return IRQ_HANDLED;
425 }
426
427 #ifdef CONFIG_DEBUG_FS
428 /*
429  * Some debugfs entries only exposed if we're using debug
430  */
431 static int ab3100_registers_print(struct seq_file *s, void *p)
432 {
433         struct ab3100 *ab3100 = s->private;
434         u8 value;
435         u8 reg;
436
437         seq_printf(s, "AB3100 registers:\n");
438
439         for (reg = 0; reg < 0xff; reg++) {
440                 ab3100_get_register_interruptible(ab3100, reg, &value);
441                 seq_printf(s, "[0x%x]:  0x%x\n", reg, value);
442         }
443         return 0;
444 }
445
446 static int ab3100_registers_open(struct inode *inode, struct file *file)
447 {
448         return single_open(file, ab3100_registers_print, inode->i_private);
449 }
450
451 static const struct file_operations ab3100_registers_fops = {
452         .open = ab3100_registers_open,
453         .read = seq_read,
454         .llseek = seq_lseek,
455         .release = single_release,
456         .owner = THIS_MODULE,
457 };
458
459 struct ab3100_get_set_reg_priv {
460         struct ab3100 *ab3100;
461         bool mode;
462 };
463
464 static int ab3100_get_set_reg_open_file(struct inode *inode, struct file *file)
465 {
466         file->private_data = inode->i_private;
467         return 0;
468 }
469
470 static ssize_t ab3100_get_set_reg(struct file *file,
471                                   const char __user *user_buf,
472                                   size_t count, loff_t *ppos)
473 {
474         struct ab3100_get_set_reg_priv *priv = file->private_data;
475         struct ab3100 *ab3100 = priv->ab3100;
476         char buf[32];
477         ssize_t buf_size;
478         int regp;
479         unsigned long user_reg;
480         int err;
481         int i = 0;
482
483         /* Get userspace string and assure termination */
484         buf_size = min(count, (sizeof(buf)-1));
485         if (copy_from_user(buf, user_buf, buf_size))
486                 return -EFAULT;
487         buf[buf_size] = 0;
488
489         /*
490          * The idea is here to parse a string which is either
491          * "0xnn" for reading a register, or "0xaa 0xbb" for
492          * writing 0xbb to the register 0xaa. First move past
493          * whitespace and then begin to parse the register.
494          */
495         while ((i < buf_size) && (buf[i] == ' '))
496                 i++;
497         regp = i;
498
499         /*
500          * Advance pointer to end of string then terminate
501          * the register string. This is needed to satisfy
502          * the strict_strtoul() function.
503          */
504         while ((i < buf_size) && (buf[i] != ' '))
505                 i++;
506         buf[i] = '\0';
507
508         err = strict_strtoul(&buf[regp], 16, &user_reg);
509         if (err)
510                 return err;
511         if (user_reg > 0xff)
512                 return -EINVAL;
513
514         /* Either we read or we write a register here */
515         if (!priv->mode) {
516                 /* Reading */
517                 u8 reg = (u8) user_reg;
518                 u8 regvalue;
519
520                 ab3100_get_register_interruptible(ab3100, reg, &regvalue);
521
522                 dev_info(ab3100->dev,
523                          "debug read AB3100 reg[0x%02x]: 0x%02x\n",
524                          reg, regvalue);
525         } else {
526                 int valp;
527                 unsigned long user_value;
528                 u8 reg = (u8) user_reg;
529                 u8 value;
530                 u8 regvalue;
531
532                 /*
533                  * Writing, we need some value to write to
534                  * the register so keep parsing the string
535                  * from userspace.
536                  */
537                 i++;
538                 while ((i < buf_size) && (buf[i] == ' '))
539                         i++;
540                 valp = i;
541                 while ((i < buf_size) && (buf[i] != ' '))
542                         i++;
543                 buf[i] = '\0';
544
545                 err = strict_strtoul(&buf[valp], 16, &user_value);
546                 if (err)
547                         return err;
548                 if (user_reg > 0xff)
549                         return -EINVAL;
550
551                 value = (u8) user_value;
552                 ab3100_set_register_interruptible(ab3100, reg, value);
553                 ab3100_get_register_interruptible(ab3100, reg, &regvalue);
554
555                 dev_info(ab3100->dev,
556                          "debug write reg[0x%02x] with 0x%02x, "
557                          "after readback: 0x%02x\n",
558                          reg, value, regvalue);
559         }
560         return buf_size;
561 }
562
563 static const struct file_operations ab3100_get_set_reg_fops = {
564         .open = ab3100_get_set_reg_open_file,
565         .write = ab3100_get_set_reg,
566 };
567
568 static struct dentry *ab3100_dir;
569 static struct dentry *ab3100_reg_file;
570 static struct ab3100_get_set_reg_priv ab3100_get_priv;
571 static struct dentry *ab3100_get_reg_file;
572 static struct ab3100_get_set_reg_priv ab3100_set_priv;
573 static struct dentry *ab3100_set_reg_file;
574
575 static void ab3100_setup_debugfs(struct ab3100 *ab3100)
576 {
577         int err;
578
579         ab3100_dir = debugfs_create_dir("ab3100", NULL);
580         if (!ab3100_dir)
581                 goto exit_no_debugfs;
582
583         ab3100_reg_file = debugfs_create_file("registers",
584                                 S_IRUGO, ab3100_dir, ab3100,
585                                 &ab3100_registers_fops);
586         if (!ab3100_reg_file) {
587                 err = -ENOMEM;
588                 goto exit_destroy_dir;
589         }
590
591         ab3100_get_priv.ab3100 = ab3100;
592         ab3100_get_priv.mode = false;
593         ab3100_get_reg_file = debugfs_create_file("get_reg",
594                                 S_IWUGO, ab3100_dir, &ab3100_get_priv,
595                                 &ab3100_get_set_reg_fops);
596         if (!ab3100_get_reg_file) {
597                 err = -ENOMEM;
598                 goto exit_destroy_reg;
599         }
600
601         ab3100_set_priv.ab3100 = ab3100;
602         ab3100_set_priv.mode = true;
603         ab3100_set_reg_file = debugfs_create_file("set_reg",
604                                 S_IWUGO, ab3100_dir, &ab3100_set_priv,
605                                 &ab3100_get_set_reg_fops);
606         if (!ab3100_set_reg_file) {
607                 err = -ENOMEM;
608                 goto exit_destroy_get_reg;
609         }
610         return;
611
612  exit_destroy_get_reg:
613         debugfs_remove(ab3100_get_reg_file);
614  exit_destroy_reg:
615         debugfs_remove(ab3100_reg_file);
616  exit_destroy_dir:
617         debugfs_remove(ab3100_dir);
618  exit_no_debugfs:
619         return;
620 }
621 static inline void ab3100_remove_debugfs(void)
622 {
623         debugfs_remove(ab3100_set_reg_file);
624         debugfs_remove(ab3100_get_reg_file);
625         debugfs_remove(ab3100_reg_file);
626         debugfs_remove(ab3100_dir);
627 }
628 #else
629 static inline void ab3100_setup_debugfs(struct ab3100 *ab3100)
630 {
631 }
632 static inline void ab3100_remove_debugfs(void)
633 {
634 }
635 #endif
636
637 /*
638  * Basic set-up, datastructure creation/destruction and I2C interface.
639  * This sets up a default config in the AB3100 chip so that it
640  * will work as expected.
641  */
642
643 struct ab3100_init_setting {
644         u8 abreg;
645         u8 setting;
646 };
647
648 static const struct ab3100_init_setting __initconst
649 ab3100_init_settings[] = {
650         {
651                 .abreg = AB3100_MCA,
652                 .setting = 0x01
653         }, {
654                 .abreg = AB3100_MCB,
655                 .setting = 0x30
656         }, {
657                 .abreg = AB3100_IMRA1,
658                 .setting = 0x00
659         }, {
660                 .abreg = AB3100_IMRA2,
661                 .setting = 0xFF
662         }, {
663                 .abreg = AB3100_IMRA3,
664                 .setting = 0x01
665         }, {
666                 .abreg = AB3100_IMRB1,
667                 .setting = 0xBF
668         }, {
669                 .abreg = AB3100_IMRB2,
670                 .setting = 0xFF
671         }, {
672                 .abreg = AB3100_IMRB3,
673                 .setting = 0xFF
674         }, {
675                 .abreg = AB3100_SUP,
676                 .setting = 0x00
677         }, {
678                 .abreg = AB3100_DIS,
679                 .setting = 0xF0
680         }, {
681                 .abreg = AB3100_D0C,
682                 .setting = 0x00
683         }, {
684                 .abreg = AB3100_D1C,
685                 .setting = 0x00
686         }, {
687                 .abreg = AB3100_D2C,
688                 .setting = 0x00
689         }, {
690                 .abreg = AB3100_D3C,
691                 .setting = 0x00
692         },
693 };
694
695 static int __init ab3100_setup(struct ab3100 *ab3100)
696 {
697         int err = 0;
698         int i;
699
700         for (i = 0; i < ARRAY_SIZE(ab3100_init_settings); i++) {
701                 err = ab3100_set_register_interruptible(ab3100,
702                                           ab3100_init_settings[i].abreg,
703                                           ab3100_init_settings[i].setting);
704                 if (err)
705                         goto exit_no_setup;
706         }
707
708         /*
709          * Special trick to make the AB3100 use the 32kHz clock (RTC)
710          * bit 3 in test register 0x02 is a special, undocumented test
711          * register bit that only exist in AB3100 P1E
712          */
713         if (ab3100->chip_id == 0xc4) {
714                 dev_warn(ab3100->dev,
715                          "AB3100 P1E variant detected, "
716                          "forcing chip to 32KHz\n");
717                 err = ab3100_set_test_register_interruptible(ab3100, 0x02, 0x08);
718         }
719
720  exit_no_setup:
721         return err;
722 }
723
724 /*
725  * Here we define all the platform devices that appear
726  * as children of the AB3100. These are regular platform
727  * devices with the IORESOURCE_IO .start and .end set
728  * to correspond to the internal AB3100 register range
729  * mapping to the corresponding subdevice.
730  */
731
732 #define AB3100_DEVICE(devname, devid)                           \
733 static struct platform_device ab3100_##devname##_device = {     \
734         .name           = devid,                                \
735         .id             = -1,                                   \
736 }
737
738 /*
739  * This lists all the subdevices and corresponding register
740  * ranges.
741  */
742 AB3100_DEVICE(dac, "ab3100-dac");
743 AB3100_DEVICE(leds, "ab3100-leds");
744 AB3100_DEVICE(power, "ab3100-power");
745 AB3100_DEVICE(regulators, "ab3100-regulators");
746 AB3100_DEVICE(sim, "ab3100-sim");
747 AB3100_DEVICE(uart, "ab3100-uart");
748 AB3100_DEVICE(rtc, "ab3100-rtc");
749 AB3100_DEVICE(charger, "ab3100-charger");
750 AB3100_DEVICE(boost, "ab3100-boost");
751 AB3100_DEVICE(adc, "ab3100-adc");
752 AB3100_DEVICE(fuelgauge, "ab3100-fuelgauge");
753 AB3100_DEVICE(vibrator, "ab3100-vibrator");
754 AB3100_DEVICE(otp, "ab3100-otp");
755 AB3100_DEVICE(codec, "ab3100-codec");
756
757 static struct platform_device *
758 ab3100_platform_devs[] = {
759         &ab3100_dac_device,
760         &ab3100_leds_device,
761         &ab3100_power_device,
762         &ab3100_regulators_device,
763         &ab3100_sim_device,
764         &ab3100_uart_device,
765         &ab3100_rtc_device,
766         &ab3100_charger_device,
767         &ab3100_boost_device,
768         &ab3100_adc_device,
769         &ab3100_fuelgauge_device,
770         &ab3100_vibrator_device,
771         &ab3100_otp_device,
772         &ab3100_codec_device,
773 };
774
775 struct ab_family_id {
776         u8      id;
777         char    *name;
778 };
779
780 static const struct ab_family_id ids[] __initdata = {
781         /* AB3100 */
782         {
783                 .id = 0xc0,
784                 .name = "P1A"
785         }, {
786                 .id = 0xc1,
787                 .name = "P1B"
788         }, {
789                 .id = 0xc2,
790                 .name = "P1C"
791         }, {
792                 .id = 0xc3,
793                 .name = "P1D"
794         }, {
795                 .id = 0xc4,
796                 .name = "P1E"
797         }, {
798                 .id = 0xc5,
799                 .name = "P1F/R1A"
800         }, {
801                 .id = 0xc6,
802                 .name = "P1G/R1A"
803         }, {
804                 .id = 0xc7,
805                 .name = "P2A/R2A"
806         }, {
807                 .id = 0xc8,
808                 .name = "P2B/R2B"
809         },
810         /* AB3000 variants, not supported */
811         {
812                 .id = 0xa0
813         }, {
814                 .id = 0xa1
815         }, {
816                 .id = 0xa2
817         }, {
818                 .id = 0xa3
819         }, {
820                 .id = 0xa4
821         }, {
822                 .id = 0xa5
823         }, {
824                 .id = 0xa6
825         }, {
826                 .id = 0xa7
827         },
828         /* Terminator */
829         {
830                 .id = 0x00,
831         },
832 };
833
834 static int __init ab3100_probe(struct i2c_client *client,
835                         const struct i2c_device_id *id)
836 {
837         struct ab3100 *ab3100;
838         struct ab3100_platform_data *ab3100_plf_data =
839                 client->dev.platform_data;
840         int err;
841         int i;
842
843         ab3100 = kzalloc(sizeof(struct ab3100), GFP_KERNEL);
844         if (!ab3100) {
845                 dev_err(&client->dev, "could not allocate AB3100 device\n");
846                 return -ENOMEM;
847         }
848
849         /* Initialize data structure */
850         mutex_init(&ab3100->access_mutex);
851         BLOCKING_INIT_NOTIFIER_HEAD(&ab3100->event_subscribers);
852
853         ab3100->i2c_client = client;
854         ab3100->dev = &ab3100->i2c_client->dev;
855
856         i2c_set_clientdata(client, ab3100);
857
858         /* Read chip ID register */
859         err = ab3100_get_register_interruptible(ab3100, AB3100_CID,
860                                                 &ab3100->chip_id);
861         if (err) {
862                 dev_err(&client->dev,
863                         "could not communicate with the AB3100 analog "
864                         "baseband chip\n");
865                 goto exit_no_detect;
866         }
867
868         for (i = 0; ids[i].id != 0x0; i++) {
869                 if (ids[i].id == ab3100->chip_id) {
870                         if (ids[i].name != NULL) {
871                                 snprintf(&ab3100->chip_name[0],
872                                          sizeof(ab3100->chip_name) - 1,
873                                          "AB3100 %s",
874                                          ids[i].name);
875                                 break;
876                         } else {
877                                 dev_err(&client->dev,
878                                         "AB3000 is not supported\n");
879                                 goto exit_no_detect;
880                         }
881                 }
882         }
883
884         if (ids[i].id == 0x0) {
885                 dev_err(&client->dev, "unknown analog baseband chip id: 0x%x\n",
886                         ab3100->chip_id);
887                 dev_err(&client->dev, "accepting it anyway. Please update "
888                         "the driver.\n");
889                 goto exit_no_detect;
890         }
891
892         dev_info(&client->dev, "Detected chip: %s\n",
893                  &ab3100->chip_name[0]);
894
895         /* Attach a second dummy i2c_client to the test register address */
896         ab3100->testreg_client = i2c_new_dummy(client->adapter,
897                                                      client->addr + 1);
898         if (!ab3100->testreg_client) {
899                 err = -ENOMEM;
900                 goto exit_no_testreg_client;
901         }
902
903         strlcpy(ab3100->testreg_client->name, id->name,
904                 sizeof(ab3100->testreg_client->name));
905
906         err = ab3100_setup(ab3100);
907         if (err)
908                 goto exit_no_setup;
909
910         INIT_WORK(&ab3100->work, ab3100_work);
911
912         /* This real unpredictable IRQ is of course sampled for entropy */
913         err = request_irq(client->irq, ab3100_irq_handler,
914                           IRQF_DISABLED | IRQF_SAMPLE_RANDOM,
915                           "AB3100 IRQ", ab3100);
916         if (err)
917                 goto exit_no_irq;
918
919         /* Set parent and a pointer back to the container in device data */
920         for (i = 0; i < ARRAY_SIZE(ab3100_platform_devs); i++) {
921                 ab3100_platform_devs[i]->dev.parent =
922                         &client->dev;
923                 ab3100_platform_devs[i]->dev.platform_data =
924                         ab3100_plf_data;
925                 platform_set_drvdata(ab3100_platform_devs[i], ab3100);
926         }
927
928         /* Register the platform devices */
929         platform_add_devices(ab3100_platform_devs,
930                              ARRAY_SIZE(ab3100_platform_devs));
931
932         ab3100_setup_debugfs(ab3100);
933
934         return 0;
935
936  exit_no_irq:
937  exit_no_setup:
938         i2c_unregister_device(ab3100->testreg_client);
939  exit_no_testreg_client:
940  exit_no_detect:
941         kfree(ab3100);
942         return err;
943 }
944
945 static int __exit ab3100_remove(struct i2c_client *client)
946 {
947         struct ab3100 *ab3100 = i2c_get_clientdata(client);
948         int i;
949
950         /* Unregister subdevices */
951         for (i = 0; i < ARRAY_SIZE(ab3100_platform_devs); i++)
952                 platform_device_unregister(ab3100_platform_devs[i]);
953
954         ab3100_remove_debugfs();
955         i2c_unregister_device(ab3100->testreg_client);
956
957         /*
958          * At this point, all subscribers should have unregistered
959          * their notifiers so deactivate IRQ
960          */
961         free_irq(client->irq, ab3100);
962         kfree(ab3100);
963         return 0;
964 }
965
966 static const struct i2c_device_id ab3100_id[] = {
967         { "ab3100", 0 },
968         { }
969 };
970 MODULE_DEVICE_TABLE(i2c, ab3100_id);
971
972 static struct i2c_driver ab3100_driver = {
973         .driver = {
974                 .name   = "ab3100",
975                 .owner  = THIS_MODULE,
976         },
977         .id_table       = ab3100_id,
978         .probe          = ab3100_probe,
979         .remove         = __exit_p(ab3100_remove),
980 };
981
982 static int __init ab3100_i2c_init(void)
983 {
984         return i2c_add_driver(&ab3100_driver);
985 }
986
987 static void __exit ab3100_i2c_exit(void)
988 {
989         i2c_del_driver(&ab3100_driver);
990 }
991
992 subsys_initcall(ab3100_i2c_init);
993 module_exit(ab3100_i2c_exit);
994
995 MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
996 MODULE_DESCRIPTION("AB3100 core driver");
997 MODULE_LICENSE("GPL");