mfd: Convert 88pm860x to use regmap api
[linux-2.6.git] / drivers / mfd / ab3100-core.c
1 /*
2  * Copyright (C) 2007-2010 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/slab.h>
14 #include <linux/err.h>
15 #include <linux/module.h>
16 #include <linux/platform_device.h>
17 #include <linux/device.h>
18 #include <linux/interrupt.h>
19 #include <linux/random.h>
20 #include <linux/debugfs.h>
21 #include <linux/seq_file.h>
22 #include <linux/uaccess.h>
23 #include <linux/mfd/core.h>
24 #include <linux/mfd/abx500.h>
25
26 /* These are the only registers inside AB3100 used in this main file */
27
28 /* Interrupt event registers */
29 #define AB3100_EVENTA1          0x21
30 #define AB3100_EVENTA2          0x22
31 #define AB3100_EVENTA3          0x23
32
33 /* AB3100 DAC converter registers */
34 #define AB3100_DIS              0x00
35 #define AB3100_D0C              0x01
36 #define AB3100_D1C              0x02
37 #define AB3100_D2C              0x03
38 #define AB3100_D3C              0x04
39
40 /* Chip ID register */
41 #define AB3100_CID              0x20
42
43 /* AB3100 interrupt registers */
44 #define AB3100_IMRA1            0x24
45 #define AB3100_IMRA2            0x25
46 #define AB3100_IMRA3            0x26
47 #define AB3100_IMRB1            0x2B
48 #define AB3100_IMRB2            0x2C
49 #define AB3100_IMRB3            0x2D
50
51 /* System Power Monitoring and control registers */
52 #define AB3100_MCA              0x2E
53 #define AB3100_MCB              0x2F
54
55 /* SIM power up */
56 #define AB3100_SUP              0x50
57
58 /*
59  * I2C communication
60  *
61  * The AB3100 is usually assigned address 0x48 (7-bit)
62  * The chip is defined in the platform i2c_board_data section.
63  */
64 static int ab3100_get_chip_id(struct device *dev)
65 {
66         struct ab3100 *ab3100 = dev_get_drvdata(dev->parent);
67
68         return (int)ab3100->chip_id;
69 }
70
71 static int ab3100_set_register_interruptible(struct ab3100 *ab3100,
72         u8 reg, u8 regval)
73 {
74         u8 regandval[2] = {reg, regval};
75         int err;
76
77         err = mutex_lock_interruptible(&ab3100->access_mutex);
78         if (err)
79                 return err;
80
81         /*
82          * A two-byte write message with the first byte containing the register
83          * number and the second byte containing the value to be written
84          * effectively sets a register in the AB3100.
85          */
86         err = i2c_master_send(ab3100->i2c_client, regandval, 2);
87         if (err < 0) {
88                 dev_err(ab3100->dev,
89                         "write error (write register): %d\n",
90                         err);
91         } else if (err != 2) {
92                 dev_err(ab3100->dev,
93                         "write error (write register) "
94                         "%d bytes transferred (expected 2)\n",
95                         err);
96                 err = -EIO;
97         } else {
98                 /* All is well */
99                 err = 0;
100         }
101         mutex_unlock(&ab3100->access_mutex);
102         return err;
103 }
104
105 static int set_register_interruptible(struct device *dev,
106         u8 bank, u8 reg, u8 value)
107 {
108         struct ab3100 *ab3100 = dev_get_drvdata(dev->parent);
109
110         return ab3100_set_register_interruptible(ab3100, reg, value);
111 }
112
113 /*
114  * The test registers exist at an I2C bus address up one
115  * from the ordinary base. They are not supposed to be used
116  * in production code, but sometimes you have to do that
117  * anyway. It's currently only used from this file so declare
118  * it static and do not export.
119  */
120 static int ab3100_set_test_register_interruptible(struct ab3100 *ab3100,
121                                     u8 reg, u8 regval)
122 {
123         u8 regandval[2] = {reg, regval};
124         int err;
125
126         err = mutex_lock_interruptible(&ab3100->access_mutex);
127         if (err)
128                 return err;
129
130         err = i2c_master_send(ab3100->testreg_client, regandval, 2);
131         if (err < 0) {
132                 dev_err(ab3100->dev,
133                         "write error (write test register): %d\n",
134                         err);
135         } else if (err != 2) {
136                 dev_err(ab3100->dev,
137                         "write error (write test register) "
138                         "%d bytes transferred (expected 2)\n",
139                         err);
140                 err = -EIO;
141         } else {
142                 /* All is well */
143                 err = 0;
144         }
145         mutex_unlock(&ab3100->access_mutex);
146
147         return err;
148 }
149
150 static int ab3100_get_register_interruptible(struct ab3100 *ab3100,
151                                              u8 reg, u8 *regval)
152 {
153         int err;
154
155         err = mutex_lock_interruptible(&ab3100->access_mutex);
156         if (err)
157                 return err;
158
159         /*
160          * AB3100 require an I2C "stop" command between each message, else
161          * it will not work. The only way of achieveing this with the
162          * message transport layer is to send the read and write messages
163          * separately.
164          */
165         err = i2c_master_send(ab3100->i2c_client, &reg, 1);
166         if (err < 0) {
167                 dev_err(ab3100->dev,
168                         "write error (send register address): %d\n",
169                         err);
170                 goto get_reg_out_unlock;
171         } else if (err != 1) {
172                 dev_err(ab3100->dev,
173                         "write error (send register address) "
174                         "%d bytes transferred (expected 1)\n",
175                         err);
176                 err = -EIO;
177                 goto get_reg_out_unlock;
178         } else {
179                 /* All is well */
180                 err = 0;
181         }
182
183         err = i2c_master_recv(ab3100->i2c_client, regval, 1);
184         if (err < 0) {
185                 dev_err(ab3100->dev,
186                         "write error (read register): %d\n",
187                         err);
188                 goto get_reg_out_unlock;
189         } else if (err != 1) {
190                 dev_err(ab3100->dev,
191                         "write error (read register) "
192                         "%d bytes transferred (expected 1)\n",
193                         err);
194                 err = -EIO;
195                 goto get_reg_out_unlock;
196         } else {
197                 /* All is well */
198                 err = 0;
199         }
200
201  get_reg_out_unlock:
202         mutex_unlock(&ab3100->access_mutex);
203         return err;
204 }
205
206 static int get_register_interruptible(struct device *dev, u8 bank, u8 reg,
207                                       u8 *value)
208 {
209         struct ab3100 *ab3100 = dev_get_drvdata(dev->parent);
210
211         return ab3100_get_register_interruptible(ab3100, reg, value);
212 }
213
214 static int ab3100_get_register_page_interruptible(struct ab3100 *ab3100,
215                              u8 first_reg, u8 *regvals, u8 numregs)
216 {
217         int err;
218
219         if (ab3100->chip_id == 0xa0 ||
220             ab3100->chip_id == 0xa1)
221                 /* These don't support paged reads */
222                 return -EIO;
223
224         err = mutex_lock_interruptible(&ab3100->access_mutex);
225         if (err)
226                 return err;
227
228         /*
229          * Paged read also require an I2C "stop" command.
230          */
231         err = i2c_master_send(ab3100->i2c_client, &first_reg, 1);
232         if (err < 0) {
233                 dev_err(ab3100->dev,
234                         "write error (send first register address): %d\n",
235                         err);
236                 goto get_reg_page_out_unlock;
237         } else if (err != 1) {
238                 dev_err(ab3100->dev,
239                         "write error (send first register address) "
240                         "%d bytes transferred (expected 1)\n",
241                         err);
242                 err = -EIO;
243                 goto get_reg_page_out_unlock;
244         }
245
246         err = i2c_master_recv(ab3100->i2c_client, regvals, numregs);
247         if (err < 0) {
248                 dev_err(ab3100->dev,
249                         "write error (read register page): %d\n",
250                         err);
251                 goto get_reg_page_out_unlock;
252         } else if (err != numregs) {
253                 dev_err(ab3100->dev,
254                         "write error (read register page) "
255                         "%d bytes transferred (expected %d)\n",
256                         err, numregs);
257                 err = -EIO;
258                 goto get_reg_page_out_unlock;
259         }
260
261         /* All is well */
262         err = 0;
263
264  get_reg_page_out_unlock:
265         mutex_unlock(&ab3100->access_mutex);
266         return err;
267 }
268
269 static int get_register_page_interruptible(struct device *dev, u8 bank,
270         u8 first_reg, u8 *regvals, u8 numregs)
271 {
272         struct ab3100 *ab3100 = dev_get_drvdata(dev->parent);
273
274         return ab3100_get_register_page_interruptible(ab3100,
275                         first_reg, regvals, numregs);
276 }
277
278 static int ab3100_mask_and_set_register_interruptible(struct ab3100 *ab3100,
279                                  u8 reg, u8 andmask, u8 ormask)
280 {
281         u8 regandval[2] = {reg, 0};
282         int err;
283
284         err = mutex_lock_interruptible(&ab3100->access_mutex);
285         if (err)
286                 return err;
287
288         /* First read out the target register */
289         err = i2c_master_send(ab3100->i2c_client, &reg, 1);
290         if (err < 0) {
291                 dev_err(ab3100->dev,
292                         "write error (maskset send address): %d\n",
293                         err);
294                 goto get_maskset_unlock;
295         } else if (err != 1) {
296                 dev_err(ab3100->dev,
297                         "write error (maskset send address) "
298                         "%d bytes transferred (expected 1)\n",
299                         err);
300                 err = -EIO;
301                 goto get_maskset_unlock;
302         }
303
304         err = i2c_master_recv(ab3100->i2c_client, &regandval[1], 1);
305         if (err < 0) {
306                 dev_err(ab3100->dev,
307                         "write error (maskset read register): %d\n",
308                         err);
309                 goto get_maskset_unlock;
310         } else if (err != 1) {
311                 dev_err(ab3100->dev,
312                         "write error (maskset read register) "
313                         "%d bytes transferred (expected 1)\n",
314                         err);
315                 err = -EIO;
316                 goto get_maskset_unlock;
317         }
318
319         /* Modify the register */
320         regandval[1] &= andmask;
321         regandval[1] |= ormask;
322
323         /* Write the register */
324         err = i2c_master_send(ab3100->i2c_client, regandval, 2);
325         if (err < 0) {
326                 dev_err(ab3100->dev,
327                         "write error (write register): %d\n",
328                         err);
329                 goto get_maskset_unlock;
330         } else if (err != 2) {
331                 dev_err(ab3100->dev,
332                         "write error (write register) "
333                         "%d bytes transferred (expected 2)\n",
334                         err);
335                 err = -EIO;
336                 goto get_maskset_unlock;
337         }
338
339         /* All is well */
340         err = 0;
341
342  get_maskset_unlock:
343         mutex_unlock(&ab3100->access_mutex);
344         return err;
345 }
346
347 static int mask_and_set_register_interruptible(struct device *dev, u8 bank,
348         u8 reg, u8 bitmask, u8 bitvalues)
349 {
350         struct ab3100 *ab3100 = dev_get_drvdata(dev->parent);
351
352         return ab3100_mask_and_set_register_interruptible(ab3100,
353                         reg, bitmask, (bitmask & bitvalues));
354 }
355
356 /*
357  * Register a simple callback for handling any AB3100 events.
358  */
359 int ab3100_event_register(struct ab3100 *ab3100,
360                           struct notifier_block *nb)
361 {
362         return blocking_notifier_chain_register(&ab3100->event_subscribers,
363                                                nb);
364 }
365 EXPORT_SYMBOL(ab3100_event_register);
366
367 /*
368  * Remove a previously registered callback.
369  */
370 int ab3100_event_unregister(struct ab3100 *ab3100,
371                             struct notifier_block *nb)
372 {
373   return blocking_notifier_chain_unregister(&ab3100->event_subscribers,
374                                             nb);
375 }
376 EXPORT_SYMBOL(ab3100_event_unregister);
377
378
379 static int ab3100_event_registers_startup_state_get(struct device *dev,
380                                              u8 *event)
381 {
382         struct ab3100 *ab3100 = dev_get_drvdata(dev->parent);
383         if (!ab3100->startup_events_read)
384                 return -EAGAIN; /* Try again later */
385         memcpy(event, ab3100->startup_events, 3);
386         return 0;
387 }
388
389 static struct abx500_ops ab3100_ops = {
390         .get_chip_id = ab3100_get_chip_id,
391         .set_register = set_register_interruptible,
392         .get_register = get_register_interruptible,
393         .get_register_page = get_register_page_interruptible,
394         .set_register_page = NULL,
395         .mask_and_set_register = mask_and_set_register_interruptible,
396         .event_registers_startup_state_get =
397                 ab3100_event_registers_startup_state_get,
398         .startup_irq_enabled = NULL,
399 };
400
401 /*
402  * This is a threaded interrupt handler so we can make some
403  * I2C calls etc.
404  */
405 static irqreturn_t ab3100_irq_handler(int irq, void *data)
406 {
407         struct ab3100 *ab3100 = data;
408         u8 event_regs[3];
409         u32 fatevent;
410         int err;
411
412         add_interrupt_randomness(irq);
413
414         err = ab3100_get_register_page_interruptible(ab3100, AB3100_EVENTA1,
415                                        event_regs, 3);
416         if (err)
417                 goto err_event;
418
419         fatevent = (event_regs[0] << 16) |
420                 (event_regs[1] << 8) |
421                 event_regs[2];
422
423         if (!ab3100->startup_events_read) {
424                 ab3100->startup_events[0] = event_regs[0];
425                 ab3100->startup_events[1] = event_regs[1];
426                 ab3100->startup_events[2] = event_regs[2];
427                 ab3100->startup_events_read = true;
428         }
429         /*
430          * The notified parties will have to mask out the events
431          * they're interested in and react to them. They will be
432          * notified on all events, then they use the fatevent value
433          * to determine if they're interested.
434          */
435         blocking_notifier_call_chain(&ab3100->event_subscribers,
436                                      fatevent, NULL);
437
438         dev_dbg(ab3100->dev,
439                 "IRQ Event: 0x%08x\n", fatevent);
440
441         return IRQ_HANDLED;
442
443  err_event:
444         dev_dbg(ab3100->dev,
445                 "error reading event status\n");
446         return IRQ_HANDLED;
447 }
448
449 #ifdef CONFIG_DEBUG_FS
450 /*
451  * Some debugfs entries only exposed if we're using debug
452  */
453 static int ab3100_registers_print(struct seq_file *s, void *p)
454 {
455         struct ab3100 *ab3100 = s->private;
456         u8 value;
457         u8 reg;
458
459         seq_printf(s, "AB3100 registers:\n");
460
461         for (reg = 0; reg < 0xff; reg++) {
462                 ab3100_get_register_interruptible(ab3100, reg, &value);
463                 seq_printf(s, "[0x%x]:  0x%x\n", reg, value);
464         }
465         return 0;
466 }
467
468 static int ab3100_registers_open(struct inode *inode, struct file *file)
469 {
470         return single_open(file, ab3100_registers_print, inode->i_private);
471 }
472
473 static const struct file_operations ab3100_registers_fops = {
474         .open = ab3100_registers_open,
475         .read = seq_read,
476         .llseek = seq_lseek,
477         .release = single_release,
478         .owner = THIS_MODULE,
479 };
480
481 struct ab3100_get_set_reg_priv {
482         struct ab3100 *ab3100;
483         bool mode;
484 };
485
486 static int ab3100_get_set_reg_open_file(struct inode *inode, struct file *file)
487 {
488         file->private_data = inode->i_private;
489         return 0;
490 }
491
492 static ssize_t ab3100_get_set_reg(struct file *file,
493                                   const char __user *user_buf,
494                                   size_t count, loff_t *ppos)
495 {
496         struct ab3100_get_set_reg_priv *priv = file->private_data;
497         struct ab3100 *ab3100 = priv->ab3100;
498         char buf[32];
499         ssize_t buf_size;
500         int regp;
501         unsigned long user_reg;
502         int err;
503         int i = 0;
504
505         /* Get userspace string and assure termination */
506         buf_size = min(count, (sizeof(buf)-1));
507         if (copy_from_user(buf, user_buf, buf_size))
508                 return -EFAULT;
509         buf[buf_size] = 0;
510
511         /*
512          * The idea is here to parse a string which is either
513          * "0xnn" for reading a register, or "0xaa 0xbb" for
514          * writing 0xbb to the register 0xaa. First move past
515          * whitespace and then begin to parse the register.
516          */
517         while ((i < buf_size) && (buf[i] == ' '))
518                 i++;
519         regp = i;
520
521         /*
522          * Advance pointer to end of string then terminate
523          * the register string. This is needed to satisfy
524          * the strict_strtoul() function.
525          */
526         while ((i < buf_size) && (buf[i] != ' '))
527                 i++;
528         buf[i] = '\0';
529
530         err = strict_strtoul(&buf[regp], 16, &user_reg);
531         if (err)
532                 return err;
533         if (user_reg > 0xff)
534                 return -EINVAL;
535
536         /* Either we read or we write a register here */
537         if (!priv->mode) {
538                 /* Reading */
539                 u8 reg = (u8) user_reg;
540                 u8 regvalue;
541
542                 ab3100_get_register_interruptible(ab3100, reg, &regvalue);
543
544                 dev_info(ab3100->dev,
545                          "debug read AB3100 reg[0x%02x]: 0x%02x\n",
546                          reg, regvalue);
547         } else {
548                 int valp;
549                 unsigned long user_value;
550                 u8 reg = (u8) user_reg;
551                 u8 value;
552                 u8 regvalue;
553
554                 /*
555                  * Writing, we need some value to write to
556                  * the register so keep parsing the string
557                  * from userspace.
558                  */
559                 i++;
560                 while ((i < buf_size) && (buf[i] == ' '))
561                         i++;
562                 valp = i;
563                 while ((i < buf_size) && (buf[i] != ' '))
564                         i++;
565                 buf[i] = '\0';
566
567                 err = strict_strtoul(&buf[valp], 16, &user_value);
568                 if (err)
569                         return err;
570                 if (user_reg > 0xff)
571                         return -EINVAL;
572
573                 value = (u8) user_value;
574                 ab3100_set_register_interruptible(ab3100, reg, value);
575                 ab3100_get_register_interruptible(ab3100, reg, &regvalue);
576
577                 dev_info(ab3100->dev,
578                          "debug write reg[0x%02x] with 0x%02x, "
579                          "after readback: 0x%02x\n",
580                          reg, value, regvalue);
581         }
582         return buf_size;
583 }
584
585 static const struct file_operations ab3100_get_set_reg_fops = {
586         .open = ab3100_get_set_reg_open_file,
587         .write = ab3100_get_set_reg,
588         .llseek = noop_llseek,
589 };
590
591 static struct dentry *ab3100_dir;
592 static struct dentry *ab3100_reg_file;
593 static struct ab3100_get_set_reg_priv ab3100_get_priv;
594 static struct dentry *ab3100_get_reg_file;
595 static struct ab3100_get_set_reg_priv ab3100_set_priv;
596 static struct dentry *ab3100_set_reg_file;
597
598 static void ab3100_setup_debugfs(struct ab3100 *ab3100)
599 {
600         int err;
601
602         ab3100_dir = debugfs_create_dir("ab3100", NULL);
603         if (!ab3100_dir)
604                 goto exit_no_debugfs;
605
606         ab3100_reg_file = debugfs_create_file("registers",
607                                 S_IRUGO, ab3100_dir, ab3100,
608                                 &ab3100_registers_fops);
609         if (!ab3100_reg_file) {
610                 err = -ENOMEM;
611                 goto exit_destroy_dir;
612         }
613
614         ab3100_get_priv.ab3100 = ab3100;
615         ab3100_get_priv.mode = false;
616         ab3100_get_reg_file = debugfs_create_file("get_reg",
617                                 S_IWUSR, ab3100_dir, &ab3100_get_priv,
618                                 &ab3100_get_set_reg_fops);
619         if (!ab3100_get_reg_file) {
620                 err = -ENOMEM;
621                 goto exit_destroy_reg;
622         }
623
624         ab3100_set_priv.ab3100 = ab3100;
625         ab3100_set_priv.mode = true;
626         ab3100_set_reg_file = debugfs_create_file("set_reg",
627                                 S_IWUSR, ab3100_dir, &ab3100_set_priv,
628                                 &ab3100_get_set_reg_fops);
629         if (!ab3100_set_reg_file) {
630                 err = -ENOMEM;
631                 goto exit_destroy_get_reg;
632         }
633         return;
634
635  exit_destroy_get_reg:
636         debugfs_remove(ab3100_get_reg_file);
637  exit_destroy_reg:
638         debugfs_remove(ab3100_reg_file);
639  exit_destroy_dir:
640         debugfs_remove(ab3100_dir);
641  exit_no_debugfs:
642         return;
643 }
644 static inline void ab3100_remove_debugfs(void)
645 {
646         debugfs_remove(ab3100_set_reg_file);
647         debugfs_remove(ab3100_get_reg_file);
648         debugfs_remove(ab3100_reg_file);
649         debugfs_remove(ab3100_dir);
650 }
651 #else
652 static inline void ab3100_setup_debugfs(struct ab3100 *ab3100)
653 {
654 }
655 static inline void ab3100_remove_debugfs(void)
656 {
657 }
658 #endif
659
660 /*
661  * Basic set-up, datastructure creation/destruction and I2C interface.
662  * This sets up a default config in the AB3100 chip so that it
663  * will work as expected.
664  */
665
666 struct ab3100_init_setting {
667         u8 abreg;
668         u8 setting;
669 };
670
671 static const struct ab3100_init_setting __devinitconst
672 ab3100_init_settings[] = {
673         {
674                 .abreg = AB3100_MCA,
675                 .setting = 0x01
676         }, {
677                 .abreg = AB3100_MCB,
678                 .setting = 0x30
679         }, {
680                 .abreg = AB3100_IMRA1,
681                 .setting = 0x00
682         }, {
683                 .abreg = AB3100_IMRA2,
684                 .setting = 0xFF
685         }, {
686                 .abreg = AB3100_IMRA3,
687                 .setting = 0x01
688         }, {
689                 .abreg = AB3100_IMRB1,
690                 .setting = 0xBF
691         }, {
692                 .abreg = AB3100_IMRB2,
693                 .setting = 0xFF
694         }, {
695                 .abreg = AB3100_IMRB3,
696                 .setting = 0xFF
697         }, {
698                 .abreg = AB3100_SUP,
699                 .setting = 0x00
700         }, {
701                 .abreg = AB3100_DIS,
702                 .setting = 0xF0
703         }, {
704                 .abreg = AB3100_D0C,
705                 .setting = 0x00
706         }, {
707                 .abreg = AB3100_D1C,
708                 .setting = 0x00
709         }, {
710                 .abreg = AB3100_D2C,
711                 .setting = 0x00
712         }, {
713                 .abreg = AB3100_D3C,
714                 .setting = 0x00
715         },
716 };
717
718 static int __devinit ab3100_setup(struct ab3100 *ab3100)
719 {
720         int err = 0;
721         int i;
722
723         for (i = 0; i < ARRAY_SIZE(ab3100_init_settings); i++) {
724                 err = ab3100_set_register_interruptible(ab3100,
725                                           ab3100_init_settings[i].abreg,
726                                           ab3100_init_settings[i].setting);
727                 if (err)
728                         goto exit_no_setup;
729         }
730
731         /*
732          * Special trick to make the AB3100 use the 32kHz clock (RTC)
733          * bit 3 in test register 0x02 is a special, undocumented test
734          * register bit that only exist in AB3100 P1E
735          */
736         if (ab3100->chip_id == 0xc4) {
737                 dev_warn(ab3100->dev,
738                          "AB3100 P1E variant detected, "
739                          "forcing chip to 32KHz\n");
740                 err = ab3100_set_test_register_interruptible(ab3100,
741                         0x02, 0x08);
742         }
743
744  exit_no_setup:
745         return err;
746 }
747
748 /* The subdevices of the AB3100 */
749 static struct mfd_cell ab3100_devs[] = {
750         {
751                 .name = "ab3100-dac",
752                 .id = -1,
753         },
754         {
755                 .name = "ab3100-leds",
756                 .id = -1,
757         },
758         {
759                 .name = "ab3100-power",
760                 .id = -1,
761         },
762         {
763                 .name = "ab3100-regulators",
764                 .id = -1,
765         },
766         {
767                 .name = "ab3100-sim",
768                 .id = -1,
769         },
770         {
771                 .name = "ab3100-uart",
772                 .id = -1,
773         },
774         {
775                 .name = "ab3100-rtc",
776                 .id = -1,
777         },
778         {
779                 .name = "ab3100-charger",
780                 .id = -1,
781         },
782         {
783                 .name = "ab3100-boost",
784                 .id = -1,
785         },
786         {
787                 .name = "ab3100-adc",
788                 .id = -1,
789         },
790         {
791                 .name = "ab3100-fuelgauge",
792                 .id = -1,
793         },
794         {
795                 .name = "ab3100-vibrator",
796                 .id = -1,
797         },
798         {
799                 .name = "ab3100-otp",
800                 .id = -1,
801         },
802         {
803                 .name = "ab3100-codec",
804                 .id = -1,
805         },
806 };
807
808 struct ab_family_id {
809         u8      id;
810         char    *name;
811 };
812
813 static const struct ab_family_id ids[] __devinitconst = {
814         /* AB3100 */
815         {
816                 .id = 0xc0,
817                 .name = "P1A"
818         }, {
819                 .id = 0xc1,
820                 .name = "P1B"
821         }, {
822                 .id = 0xc2,
823                 .name = "P1C"
824         }, {
825                 .id = 0xc3,
826                 .name = "P1D"
827         }, {
828                 .id = 0xc4,
829                 .name = "P1E"
830         }, {
831                 .id = 0xc5,
832                 .name = "P1F/R1A"
833         }, {
834                 .id = 0xc6,
835                 .name = "P1G/R1A"
836         }, {
837                 .id = 0xc7,
838                 .name = "P2A/R2A"
839         }, {
840                 .id = 0xc8,
841                 .name = "P2B/R2B"
842         },
843         /* AB3000 variants, not supported */
844         {
845                 .id = 0xa0
846         }, {
847                 .id = 0xa1
848         }, {
849                 .id = 0xa2
850         }, {
851                 .id = 0xa3
852         }, {
853                 .id = 0xa4
854         }, {
855                 .id = 0xa5
856         }, {
857                 .id = 0xa6
858         }, {
859                 .id = 0xa7
860         },
861         /* Terminator */
862         {
863                 .id = 0x00,
864         },
865 };
866
867 static int __devinit ab3100_probe(struct i2c_client *client,
868                                   const struct i2c_device_id *id)
869 {
870         struct ab3100 *ab3100;
871         struct ab3100_platform_data *ab3100_plf_data =
872                 client->dev.platform_data;
873         int err;
874         int i;
875
876         ab3100 = kzalloc(sizeof(struct ab3100), GFP_KERNEL);
877         if (!ab3100) {
878                 dev_err(&client->dev, "could not allocate AB3100 device\n");
879                 return -ENOMEM;
880         }
881
882         /* Initialize data structure */
883         mutex_init(&ab3100->access_mutex);
884         BLOCKING_INIT_NOTIFIER_HEAD(&ab3100->event_subscribers);
885
886         ab3100->i2c_client = client;
887         ab3100->dev = &ab3100->i2c_client->dev;
888
889         i2c_set_clientdata(client, ab3100);
890
891         /* Read chip ID register */
892         err = ab3100_get_register_interruptible(ab3100, AB3100_CID,
893                                                 &ab3100->chip_id);
894         if (err) {
895                 dev_err(&client->dev,
896                         "could not communicate with the AB3100 analog "
897                         "baseband chip\n");
898                 goto exit_no_detect;
899         }
900
901         for (i = 0; ids[i].id != 0x0; i++) {
902                 if (ids[i].id == ab3100->chip_id) {
903                         if (ids[i].name != NULL) {
904                                 snprintf(&ab3100->chip_name[0],
905                                          sizeof(ab3100->chip_name) - 1,
906                                          "AB3100 %s",
907                                          ids[i].name);
908                                 break;
909                         } else {
910                                 dev_err(&client->dev,
911                                         "AB3000 is not supported\n");
912                                 goto exit_no_detect;
913                         }
914                 }
915         }
916
917         if (ids[i].id == 0x0) {
918                 dev_err(&client->dev, "unknown analog baseband chip id: 0x%x\n",
919                         ab3100->chip_id);
920                 dev_err(&client->dev, "accepting it anyway. Please update "
921                         "the driver.\n");
922                 goto exit_no_detect;
923         }
924
925         dev_info(&client->dev, "Detected chip: %s\n",
926                  &ab3100->chip_name[0]);
927
928         /* Attach a second dummy i2c_client to the test register address */
929         ab3100->testreg_client = i2c_new_dummy(client->adapter,
930                                                      client->addr + 1);
931         if (!ab3100->testreg_client) {
932                 err = -ENOMEM;
933                 goto exit_no_testreg_client;
934         }
935
936         err = ab3100_setup(ab3100);
937         if (err)
938                 goto exit_no_setup;
939
940         err = request_threaded_irq(client->irq, NULL, ab3100_irq_handler,
941                                 IRQF_ONESHOT, "ab3100-core", ab3100);
942         /* This real unpredictable IRQ is of course sampled for entropy */
943         rand_initialize_irq(client->irq);
944
945         if (err)
946                 goto exit_no_irq;
947
948         err = abx500_register_ops(&client->dev, &ab3100_ops);
949         if (err)
950                 goto exit_no_ops;
951
952         /* Set up and register the platform devices. */
953         for (i = 0; i < ARRAY_SIZE(ab3100_devs); i++) {
954                 ab3100_devs[i].platform_data = ab3100_plf_data;
955                 ab3100_devs[i].pdata_size = sizeof(struct ab3100_platform_data);
956         }
957
958         err = mfd_add_devices(&client->dev, 0, ab3100_devs,
959                 ARRAY_SIZE(ab3100_devs), NULL, 0);
960
961         ab3100_setup_debugfs(ab3100);
962
963         return 0;
964
965  exit_no_ops:
966  exit_no_irq:
967  exit_no_setup:
968         i2c_unregister_device(ab3100->testreg_client);
969  exit_no_testreg_client:
970  exit_no_detect:
971         kfree(ab3100);
972         return err;
973 }
974
975 static int __devexit ab3100_remove(struct i2c_client *client)
976 {
977         struct ab3100 *ab3100 = i2c_get_clientdata(client);
978
979         /* Unregister subdevices */
980         mfd_remove_devices(&client->dev);
981
982         ab3100_remove_debugfs();
983         i2c_unregister_device(ab3100->testreg_client);
984
985         /*
986          * At this point, all subscribers should have unregistered
987          * their notifiers so deactivate IRQ
988          */
989         free_irq(client->irq, ab3100);
990         kfree(ab3100);
991         return 0;
992 }
993
994 static const struct i2c_device_id ab3100_id[] = {
995         { "ab3100", 0 },
996         { }
997 };
998 MODULE_DEVICE_TABLE(i2c, ab3100_id);
999
1000 static struct i2c_driver ab3100_driver = {
1001         .driver = {
1002                 .name   = "ab3100",
1003                 .owner  = THIS_MODULE,
1004         },
1005         .id_table       = ab3100_id,
1006         .probe          = ab3100_probe,
1007         .remove         = __devexit_p(ab3100_remove),
1008 };
1009
1010 static int __init ab3100_i2c_init(void)
1011 {
1012         return i2c_add_driver(&ab3100_driver);
1013 }
1014
1015 static void __exit ab3100_i2c_exit(void)
1016 {
1017         i2c_del_driver(&ab3100_driver);
1018 }
1019
1020 subsys_initcall(ab3100_i2c_init);
1021 module_exit(ab3100_i2c_exit);
1022
1023 MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
1024 MODULE_DESCRIPTION("AB3100 core driver");
1025 MODULE_LICENSE("GPL");