Commit | Line | Data |
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14fa5691 | 1 | /* |
2071db48 | 2 | * Copyright (C) 2007-2010 ST-Ericsson |
14fa5691 LW |
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> | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
14fa5691 | 14 | #include <linux/err.h> |
4e36dd33 | 15 | #include <linux/module.h> |
14fa5691 LW |
16 | #include <linux/platform_device.h> |
17 | #include <linux/device.h> | |
18 | #include <linux/interrupt.h> | |
2071db48 | 19 | #include <linux/random.h> |
14fa5691 LW |
20 | #include <linux/debugfs.h> |
21 | #include <linux/seq_file.h> | |
22 | #include <linux/uaccess.h> | |
8c96aefb | 23 | #include <linux/mfd/core.h> |
0fd0013c | 24 | #include <linux/mfd/ab3100.h> |
812f9e9d | 25 | #include <linux/mfd/abx500.h> |
14fa5691 LW |
26 | |
27 | /* These are the only registers inside AB3100 used in this main file */ | |
28 | ||
29 | /* Interrupt event registers */ | |
30 | #define AB3100_EVENTA1 0x21 | |
31 | #define AB3100_EVENTA2 0x22 | |
32 | #define AB3100_EVENTA3 0x23 | |
33 | ||
34 | /* AB3100 DAC converter registers */ | |
35 | #define AB3100_DIS 0x00 | |
36 | #define AB3100_D0C 0x01 | |
37 | #define AB3100_D1C 0x02 | |
38 | #define AB3100_D2C 0x03 | |
39 | #define AB3100_D3C 0x04 | |
40 | ||
41 | /* Chip ID register */ | |
42 | #define AB3100_CID 0x20 | |
43 | ||
44 | /* AB3100 interrupt registers */ | |
45 | #define AB3100_IMRA1 0x24 | |
46 | #define AB3100_IMRA2 0x25 | |
47 | #define AB3100_IMRA3 0x26 | |
48 | #define AB3100_IMRB1 0x2B | |
49 | #define AB3100_IMRB2 0x2C | |
50 | #define AB3100_IMRB3 0x2D | |
51 | ||
52 | /* System Power Monitoring and control registers */ | |
53 | #define AB3100_MCA 0x2E | |
54 | #define AB3100_MCB 0x2F | |
55 | ||
56 | /* SIM power up */ | |
57 | #define AB3100_SUP 0x50 | |
58 | ||
59 | /* | |
60 | * I2C communication | |
61 | * | |
62 | * The AB3100 is usually assigned address 0x48 (7-bit) | |
63 | * The chip is defined in the platform i2c_board_data section. | |
64 | */ | |
fa661258 | 65 | static int ab3100_get_chip_id(struct device *dev) |
14fa5691 | 66 | { |
fa661258 MW |
67 | struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); |
68 | ||
69 | return (int)ab3100->chip_id; | |
14fa5691 | 70 | } |
14fa5691 | 71 | |
fa661258 MW |
72 | static int ab3100_set_register_interruptible(struct ab3100 *ab3100, |
73 | u8 reg, u8 regval) | |
14fa5691 LW |
74 | { |
75 | u8 regandval[2] = {reg, regval}; | |
76 | int err; | |
77 | ||
78 | err = mutex_lock_interruptible(&ab3100->access_mutex); | |
79 | if (err) | |
80 | return err; | |
81 | ||
82 | /* | |
83 | * A two-byte write message with the first byte containing the register | |
84 | * number and the second byte containing the value to be written | |
85 | * effectively sets a register in the AB3100. | |
86 | */ | |
87 | err = i2c_master_send(ab3100->i2c_client, regandval, 2); | |
88 | if (err < 0) { | |
89 | dev_err(ab3100->dev, | |
90 | "write error (write register): %d\n", | |
91 | err); | |
92 | } else if (err != 2) { | |
93 | dev_err(ab3100->dev, | |
94 | "write error (write register) " | |
95 | "%d bytes transferred (expected 2)\n", | |
96 | err); | |
97 | err = -EIO; | |
98 | } else { | |
99 | /* All is well */ | |
100 | err = 0; | |
101 | } | |
102 | mutex_unlock(&ab3100->access_mutex); | |
7cdc2b98 | 103 | return err; |
14fa5691 | 104 | } |
956f25a6 | 105 | |
fa661258 MW |
106 | static int set_register_interruptible(struct device *dev, |
107 | u8 bank, u8 reg, u8 value) | |
108 | { | |
109 | struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); | |
110 | ||
111 | return ab3100_set_register_interruptible(ab3100, reg, value); | |
112 | } | |
14fa5691 LW |
113 | |
114 | /* | |
115 | * The test registers exist at an I2C bus address up one | |
116 | * from the ordinary base. They are not supposed to be used | |
117 | * in production code, but sometimes you have to do that | |
118 | * anyway. It's currently only used from this file so declare | |
119 | * it static and do not export. | |
120 | */ | |
956f25a6 | 121 | static int ab3100_set_test_register_interruptible(struct ab3100 *ab3100, |
14fa5691 LW |
122 | u8 reg, u8 regval) |
123 | { | |
124 | u8 regandval[2] = {reg, regval}; | |
125 | int err; | |
126 | ||
127 | err = mutex_lock_interruptible(&ab3100->access_mutex); | |
128 | if (err) | |
129 | return err; | |
130 | ||
131 | err = i2c_master_send(ab3100->testreg_client, regandval, 2); | |
132 | if (err < 0) { | |
133 | dev_err(ab3100->dev, | |
134 | "write error (write test register): %d\n", | |
135 | err); | |
136 | } else if (err != 2) { | |
137 | dev_err(ab3100->dev, | |
138 | "write error (write test register) " | |
139 | "%d bytes transferred (expected 2)\n", | |
140 | err); | |
141 | err = -EIO; | |
142 | } else { | |
143 | /* All is well */ | |
144 | err = 0; | |
145 | } | |
146 | mutex_unlock(&ab3100->access_mutex); | |
147 | ||
148 | return err; | |
149 | } | |
150 | ||
fa661258 | 151 | static int ab3100_get_register_interruptible(struct ab3100 *ab3100, |
8c96aefb | 152 | u8 reg, u8 *regval) |
14fa5691 LW |
153 | { |
154 | int err; | |
155 | ||
156 | err = mutex_lock_interruptible(&ab3100->access_mutex); | |
157 | if (err) | |
158 | return err; | |
159 | ||
160 | /* | |
161 | * AB3100 require an I2C "stop" command between each message, else | |
162 | * it will not work. The only way of achieveing this with the | |
163 | * message transport layer is to send the read and write messages | |
164 | * separately. | |
165 | */ | |
166 | err = i2c_master_send(ab3100->i2c_client, ®, 1); | |
167 | if (err < 0) { | |
168 | dev_err(ab3100->dev, | |
169 | "write error (send register address): %d\n", | |
170 | err); | |
171 | goto get_reg_out_unlock; | |
172 | } else if (err != 1) { | |
173 | dev_err(ab3100->dev, | |
174 | "write error (send register address) " | |
175 | "%d bytes transferred (expected 1)\n", | |
176 | err); | |
177 | err = -EIO; | |
178 | goto get_reg_out_unlock; | |
179 | } else { | |
180 | /* All is well */ | |
181 | err = 0; | |
182 | } | |
183 | ||
184 | err = i2c_master_recv(ab3100->i2c_client, regval, 1); | |
185 | if (err < 0) { | |
186 | dev_err(ab3100->dev, | |
187 | "write error (read register): %d\n", | |
188 | err); | |
189 | goto get_reg_out_unlock; | |
190 | } else if (err != 1) { | |
191 | dev_err(ab3100->dev, | |
192 | "write error (read register) " | |
193 | "%d bytes transferred (expected 1)\n", | |
194 | err); | |
195 | err = -EIO; | |
196 | goto get_reg_out_unlock; | |
197 | } else { | |
198 | /* All is well */ | |
199 | err = 0; | |
200 | } | |
201 | ||
202 | get_reg_out_unlock: | |
203 | mutex_unlock(&ab3100->access_mutex); | |
204 | return err; | |
205 | } | |
956f25a6 | 206 | |
fa661258 | 207 | static int get_register_interruptible(struct device *dev, u8 bank, u8 reg, |
8c96aefb | 208 | u8 *value) |
fa661258 MW |
209 | { |
210 | struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); | |
211 | ||
212 | return ab3100_get_register_interruptible(ab3100, reg, value); | |
213 | } | |
14fa5691 | 214 | |
fa661258 | 215 | static int ab3100_get_register_page_interruptible(struct ab3100 *ab3100, |
14fa5691 LW |
216 | u8 first_reg, u8 *regvals, u8 numregs) |
217 | { | |
218 | int err; | |
219 | ||
220 | if (ab3100->chip_id == 0xa0 || | |
221 | ab3100->chip_id == 0xa1) | |
222 | /* These don't support paged reads */ | |
223 | return -EIO; | |
224 | ||
225 | err = mutex_lock_interruptible(&ab3100->access_mutex); | |
226 | if (err) | |
227 | return err; | |
228 | ||
229 | /* | |
230 | * Paged read also require an I2C "stop" command. | |
231 | */ | |
232 | err = i2c_master_send(ab3100->i2c_client, &first_reg, 1); | |
233 | if (err < 0) { | |
234 | dev_err(ab3100->dev, | |
235 | "write error (send first register address): %d\n", | |
236 | err); | |
237 | goto get_reg_page_out_unlock; | |
238 | } else if (err != 1) { | |
239 | dev_err(ab3100->dev, | |
240 | "write error (send first register address) " | |
241 | "%d bytes transferred (expected 1)\n", | |
242 | err); | |
243 | err = -EIO; | |
244 | goto get_reg_page_out_unlock; | |
245 | } | |
246 | ||
247 | err = i2c_master_recv(ab3100->i2c_client, regvals, numregs); | |
248 | if (err < 0) { | |
249 | dev_err(ab3100->dev, | |
250 | "write error (read register page): %d\n", | |
251 | err); | |
252 | goto get_reg_page_out_unlock; | |
253 | } else if (err != numregs) { | |
254 | dev_err(ab3100->dev, | |
255 | "write error (read register page) " | |
256 | "%d bytes transferred (expected %d)\n", | |
257 | err, numregs); | |
258 | err = -EIO; | |
259 | goto get_reg_page_out_unlock; | |
260 | } | |
261 | ||
262 | /* All is well */ | |
263 | err = 0; | |
264 | ||
265 | get_reg_page_out_unlock: | |
266 | mutex_unlock(&ab3100->access_mutex); | |
267 | return err; | |
268 | } | |
14fa5691 | 269 | |
fa661258 MW |
270 | static int get_register_page_interruptible(struct device *dev, u8 bank, |
271 | u8 first_reg, u8 *regvals, u8 numregs) | |
272 | { | |
273 | struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); | |
274 | ||
275 | return ab3100_get_register_page_interruptible(ab3100, | |
276 | first_reg, regvals, numregs); | |
277 | } | |
956f25a6 | 278 | |
fa661258 | 279 | static int ab3100_mask_and_set_register_interruptible(struct ab3100 *ab3100, |
14fa5691 LW |
280 | u8 reg, u8 andmask, u8 ormask) |
281 | { | |
282 | u8 regandval[2] = {reg, 0}; | |
283 | int err; | |
284 | ||
285 | err = mutex_lock_interruptible(&ab3100->access_mutex); | |
286 | if (err) | |
287 | return err; | |
288 | ||
289 | /* First read out the target register */ | |
290 | err = i2c_master_send(ab3100->i2c_client, ®, 1); | |
291 | if (err < 0) { | |
292 | dev_err(ab3100->dev, | |
293 | "write error (maskset send address): %d\n", | |
294 | err); | |
295 | goto get_maskset_unlock; | |
296 | } else if (err != 1) { | |
297 | dev_err(ab3100->dev, | |
298 | "write error (maskset send address) " | |
299 | "%d bytes transferred (expected 1)\n", | |
300 | err); | |
301 | err = -EIO; | |
302 | goto get_maskset_unlock; | |
303 | } | |
304 | ||
305 | err = i2c_master_recv(ab3100->i2c_client, ®andval[1], 1); | |
306 | if (err < 0) { | |
307 | dev_err(ab3100->dev, | |
308 | "write error (maskset read register): %d\n", | |
309 | err); | |
310 | goto get_maskset_unlock; | |
311 | } else if (err != 1) { | |
312 | dev_err(ab3100->dev, | |
313 | "write error (maskset read register) " | |
314 | "%d bytes transferred (expected 1)\n", | |
315 | err); | |
316 | err = -EIO; | |
317 | goto get_maskset_unlock; | |
318 | } | |
319 | ||
320 | /* Modify the register */ | |
321 | regandval[1] &= andmask; | |
322 | regandval[1] |= ormask; | |
323 | ||
324 | /* Write the register */ | |
325 | err = i2c_master_send(ab3100->i2c_client, regandval, 2); | |
326 | if (err < 0) { | |
327 | dev_err(ab3100->dev, | |
328 | "write error (write register): %d\n", | |
329 | err); | |
330 | goto get_maskset_unlock; | |
331 | } else if (err != 2) { | |
332 | dev_err(ab3100->dev, | |
333 | "write error (write register) " | |
334 | "%d bytes transferred (expected 2)\n", | |
335 | err); | |
336 | err = -EIO; | |
337 | goto get_maskset_unlock; | |
338 | } | |
339 | ||
340 | /* All is well */ | |
341 | err = 0; | |
342 | ||
343 | get_maskset_unlock: | |
344 | mutex_unlock(&ab3100->access_mutex); | |
345 | return err; | |
346 | } | |
956f25a6 | 347 | |
fa661258 MW |
348 | static int mask_and_set_register_interruptible(struct device *dev, u8 bank, |
349 | u8 reg, u8 bitmask, u8 bitvalues) | |
350 | { | |
351 | struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); | |
352 | ||
353 | return ab3100_mask_and_set_register_interruptible(ab3100, | |
354 | reg, bitmask, (bitmask & bitvalues)); | |
355 | } | |
14fa5691 LW |
356 | |
357 | /* | |
358 | * Register a simple callback for handling any AB3100 events. | |
359 | */ | |
360 | int ab3100_event_register(struct ab3100 *ab3100, | |
361 | struct notifier_block *nb) | |
362 | { | |
363 | return blocking_notifier_chain_register(&ab3100->event_subscribers, | |
364 | nb); | |
365 | } | |
366 | EXPORT_SYMBOL(ab3100_event_register); | |
367 | ||
368 | /* | |
369 | * Remove a previously registered callback. | |
370 | */ | |
371 | int ab3100_event_unregister(struct ab3100 *ab3100, | |
372 | struct notifier_block *nb) | |
373 | { | |
374 | return blocking_notifier_chain_unregister(&ab3100->event_subscribers, | |
375 | nb); | |
376 | } | |
377 | EXPORT_SYMBOL(ab3100_event_unregister); | |
378 | ||
379 | ||
fa661258 MW |
380 | static int ab3100_event_registers_startup_state_get(struct device *dev, |
381 | u8 *event) | |
14fa5691 | 382 | { |
fa661258 | 383 | struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); |
14fa5691 LW |
384 | if (!ab3100->startup_events_read) |
385 | return -EAGAIN; /* Try again later */ | |
fa661258 | 386 | memcpy(event, ab3100->startup_events, 3); |
14fa5691 LW |
387 | return 0; |
388 | } | |
fa661258 MW |
389 | |
390 | static struct abx500_ops ab3100_ops = { | |
391 | .get_chip_id = ab3100_get_chip_id, | |
392 | .set_register = set_register_interruptible, | |
393 | .get_register = get_register_interruptible, | |
394 | .get_register_page = get_register_page_interruptible, | |
395 | .set_register_page = NULL, | |
396 | .mask_and_set_register = mask_and_set_register_interruptible, | |
397 | .event_registers_startup_state_get = | |
398 | ab3100_event_registers_startup_state_get, | |
399 | .startup_irq_enabled = NULL, | |
400 | }; | |
14fa5691 | 401 | |
0df883df LW |
402 | /* |
403 | * This is a threaded interrupt handler so we can make some | |
404 | * I2C calls etc. | |
405 | */ | |
406 | static irqreturn_t ab3100_irq_handler(int irq, void *data) | |
14fa5691 | 407 | { |
0df883df | 408 | struct ab3100 *ab3100 = data; |
14fa5691 LW |
409 | u8 event_regs[3]; |
410 | u32 fatevent; | |
411 | int err; | |
412 | ||
956f25a6 | 413 | err = ab3100_get_register_page_interruptible(ab3100, AB3100_EVENTA1, |
14fa5691 LW |
414 | event_regs, 3); |
415 | if (err) | |
0df883df | 416 | goto err_event; |
14fa5691 LW |
417 | |
418 | fatevent = (event_regs[0] << 16) | | |
419 | (event_regs[1] << 8) | | |
420 | event_regs[2]; | |
421 | ||
422 | if (!ab3100->startup_events_read) { | |
fa661258 MW |
423 | ab3100->startup_events[0] = event_regs[0]; |
424 | ab3100->startup_events[1] = event_regs[1]; | |
425 | ab3100->startup_events[2] = event_regs[2]; | |
14fa5691 LW |
426 | ab3100->startup_events_read = true; |
427 | } | |
428 | /* | |
429 | * The notified parties will have to mask out the events | |
430 | * they're interested in and react to them. They will be | |
431 | * notified on all events, then they use the fatevent value | |
432 | * to determine if they're interested. | |
433 | */ | |
434 | blocking_notifier_call_chain(&ab3100->event_subscribers, | |
435 | fatevent, NULL); | |
436 | ||
437 | dev_dbg(ab3100->dev, | |
438 | "IRQ Event: 0x%08x\n", fatevent); | |
439 | ||
0df883df | 440 | return IRQ_HANDLED; |
14fa5691 | 441 | |
0df883df | 442 | err_event: |
14fa5691 | 443 | dev_dbg(ab3100->dev, |
0df883df | 444 | "error reading event status\n"); |
14fa5691 LW |
445 | return IRQ_HANDLED; |
446 | } | |
447 | ||
448 | #ifdef CONFIG_DEBUG_FS | |
449 | /* | |
450 | * Some debugfs entries only exposed if we're using debug | |
451 | */ | |
452 | static int ab3100_registers_print(struct seq_file *s, void *p) | |
453 | { | |
454 | struct ab3100 *ab3100 = s->private; | |
455 | u8 value; | |
456 | u8 reg; | |
457 | ||
458 | seq_printf(s, "AB3100 registers:\n"); | |
459 | ||
460 | for (reg = 0; reg < 0xff; reg++) { | |
956f25a6 | 461 | ab3100_get_register_interruptible(ab3100, reg, &value); |
14fa5691 LW |
462 | seq_printf(s, "[0x%x]: 0x%x\n", reg, value); |
463 | } | |
464 | return 0; | |
465 | } | |
466 | ||
467 | static int ab3100_registers_open(struct inode *inode, struct file *file) | |
468 | { | |
469 | return single_open(file, ab3100_registers_print, inode->i_private); | |
470 | } | |
471 | ||
472 | static const struct file_operations ab3100_registers_fops = { | |
473 | .open = ab3100_registers_open, | |
474 | .read = seq_read, | |
475 | .llseek = seq_lseek, | |
476 | .release = single_release, | |
477 | .owner = THIS_MODULE, | |
478 | }; | |
479 | ||
480 | struct ab3100_get_set_reg_priv { | |
481 | struct ab3100 *ab3100; | |
482 | bool mode; | |
483 | }; | |
484 | ||
dfc3aa72 SO |
485 | static ssize_t ab3100_get_set_reg(struct file *file, |
486 | const char __user *user_buf, | |
487 | size_t count, loff_t *ppos) | |
14fa5691 LW |
488 | { |
489 | struct ab3100_get_set_reg_priv *priv = file->private_data; | |
490 | struct ab3100 *ab3100 = priv->ab3100; | |
491 | char buf[32]; | |
dfc3aa72 | 492 | ssize_t buf_size; |
14fa5691 LW |
493 | int regp; |
494 | unsigned long user_reg; | |
495 | int err; | |
496 | int i = 0; | |
497 | ||
498 | /* Get userspace string and assure termination */ | |
499 | buf_size = min(count, (sizeof(buf)-1)); | |
500 | if (copy_from_user(buf, user_buf, buf_size)) | |
501 | return -EFAULT; | |
502 | buf[buf_size] = 0; | |
503 | ||
504 | /* | |
505 | * The idea is here to parse a string which is either | |
506 | * "0xnn" for reading a register, or "0xaa 0xbb" for | |
507 | * writing 0xbb to the register 0xaa. First move past | |
508 | * whitespace and then begin to parse the register. | |
509 | */ | |
510 | while ((i < buf_size) && (buf[i] == ' ')) | |
511 | i++; | |
512 | regp = i; | |
513 | ||
514 | /* | |
515 | * Advance pointer to end of string then terminate | |
516 | * the register string. This is needed to satisfy | |
517 | * the strict_strtoul() function. | |
518 | */ | |
519 | while ((i < buf_size) && (buf[i] != ' ')) | |
520 | i++; | |
521 | buf[i] = '\0'; | |
522 | ||
523 | err = strict_strtoul(&buf[regp], 16, &user_reg); | |
524 | if (err) | |
525 | return err; | |
526 | if (user_reg > 0xff) | |
527 | return -EINVAL; | |
528 | ||
529 | /* Either we read or we write a register here */ | |
530 | if (!priv->mode) { | |
531 | /* Reading */ | |
532 | u8 reg = (u8) user_reg; | |
533 | u8 regvalue; | |
534 | ||
956f25a6 | 535 | ab3100_get_register_interruptible(ab3100, reg, ®value); |
14fa5691 LW |
536 | |
537 | dev_info(ab3100->dev, | |
538 | "debug read AB3100 reg[0x%02x]: 0x%02x\n", | |
539 | reg, regvalue); | |
540 | } else { | |
541 | int valp; | |
542 | unsigned long user_value; | |
543 | u8 reg = (u8) user_reg; | |
544 | u8 value; | |
545 | u8 regvalue; | |
546 | ||
547 | /* | |
548 | * Writing, we need some value to write to | |
549 | * the register so keep parsing the string | |
550 | * from userspace. | |
551 | */ | |
552 | i++; | |
553 | while ((i < buf_size) && (buf[i] == ' ')) | |
554 | i++; | |
555 | valp = i; | |
556 | while ((i < buf_size) && (buf[i] != ' ')) | |
557 | i++; | |
558 | buf[i] = '\0'; | |
559 | ||
560 | err = strict_strtoul(&buf[valp], 16, &user_value); | |
561 | if (err) | |
562 | return err; | |
563 | if (user_reg > 0xff) | |
564 | return -EINVAL; | |
565 | ||
566 | value = (u8) user_value; | |
956f25a6 LW |
567 | ab3100_set_register_interruptible(ab3100, reg, value); |
568 | ab3100_get_register_interruptible(ab3100, reg, ®value); | |
14fa5691 LW |
569 | |
570 | dev_info(ab3100->dev, | |
571 | "debug write reg[0x%02x] with 0x%02x, " | |
572 | "after readback: 0x%02x\n", | |
573 | reg, value, regvalue); | |
574 | } | |
575 | return buf_size; | |
576 | } | |
577 | ||
578 | static const struct file_operations ab3100_get_set_reg_fops = { | |
234e3405 | 579 | .open = simple_open, |
14fa5691 | 580 | .write = ab3100_get_set_reg, |
6038f373 | 581 | .llseek = noop_llseek, |
14fa5691 LW |
582 | }; |
583 | ||
584 | static struct dentry *ab3100_dir; | |
585 | static struct dentry *ab3100_reg_file; | |
586 | static struct ab3100_get_set_reg_priv ab3100_get_priv; | |
587 | static struct dentry *ab3100_get_reg_file; | |
588 | static struct ab3100_get_set_reg_priv ab3100_set_priv; | |
589 | static struct dentry *ab3100_set_reg_file; | |
590 | ||
591 | static void ab3100_setup_debugfs(struct ab3100 *ab3100) | |
592 | { | |
593 | int err; | |
594 | ||
595 | ab3100_dir = debugfs_create_dir("ab3100", NULL); | |
596 | if (!ab3100_dir) | |
597 | goto exit_no_debugfs; | |
598 | ||
599 | ab3100_reg_file = debugfs_create_file("registers", | |
600 | S_IRUGO, ab3100_dir, ab3100, | |
601 | &ab3100_registers_fops); | |
602 | if (!ab3100_reg_file) { | |
603 | err = -ENOMEM; | |
604 | goto exit_destroy_dir; | |
605 | } | |
606 | ||
607 | ab3100_get_priv.ab3100 = ab3100; | |
608 | ab3100_get_priv.mode = false; | |
609 | ab3100_get_reg_file = debugfs_create_file("get_reg", | |
f8a06977 | 610 | S_IWUSR, ab3100_dir, &ab3100_get_priv, |
14fa5691 LW |
611 | &ab3100_get_set_reg_fops); |
612 | if (!ab3100_get_reg_file) { | |
613 | err = -ENOMEM; | |
614 | goto exit_destroy_reg; | |
615 | } | |
616 | ||
617 | ab3100_set_priv.ab3100 = ab3100; | |
618 | ab3100_set_priv.mode = true; | |
619 | ab3100_set_reg_file = debugfs_create_file("set_reg", | |
f8a06977 | 620 | S_IWUSR, ab3100_dir, &ab3100_set_priv, |
14fa5691 LW |
621 | &ab3100_get_set_reg_fops); |
622 | if (!ab3100_set_reg_file) { | |
623 | err = -ENOMEM; | |
624 | goto exit_destroy_get_reg; | |
625 | } | |
626 | return; | |
627 | ||
628 | exit_destroy_get_reg: | |
629 | debugfs_remove(ab3100_get_reg_file); | |
630 | exit_destroy_reg: | |
631 | debugfs_remove(ab3100_reg_file); | |
632 | exit_destroy_dir: | |
633 | debugfs_remove(ab3100_dir); | |
634 | exit_no_debugfs: | |
635 | return; | |
636 | } | |
637 | static inline void ab3100_remove_debugfs(void) | |
638 | { | |
639 | debugfs_remove(ab3100_set_reg_file); | |
640 | debugfs_remove(ab3100_get_reg_file); | |
641 | debugfs_remove(ab3100_reg_file); | |
642 | debugfs_remove(ab3100_dir); | |
643 | } | |
644 | #else | |
645 | static inline void ab3100_setup_debugfs(struct ab3100 *ab3100) | |
646 | { | |
647 | } | |
648 | static inline void ab3100_remove_debugfs(void) | |
649 | { | |
650 | } | |
651 | #endif | |
652 | ||
653 | /* | |
654 | * Basic set-up, datastructure creation/destruction and I2C interface. | |
655 | * This sets up a default config in the AB3100 chip so that it | |
656 | * will work as expected. | |
657 | */ | |
658 | ||
659 | struct ab3100_init_setting { | |
660 | u8 abreg; | |
661 | u8 setting; | |
662 | }; | |
663 | ||
a73e5df1 | 664 | static const struct ab3100_init_setting ab3100_init_settings[] = { |
14fa5691 LW |
665 | { |
666 | .abreg = AB3100_MCA, | |
667 | .setting = 0x01 | |
668 | }, { | |
669 | .abreg = AB3100_MCB, | |
670 | .setting = 0x30 | |
671 | }, { | |
672 | .abreg = AB3100_IMRA1, | |
673 | .setting = 0x00 | |
674 | }, { | |
675 | .abreg = AB3100_IMRA2, | |
676 | .setting = 0xFF | |
677 | }, { | |
678 | .abreg = AB3100_IMRA3, | |
679 | .setting = 0x01 | |
680 | }, { | |
681 | .abreg = AB3100_IMRB1, | |
ce290b0e | 682 | .setting = 0xBF |
14fa5691 LW |
683 | }, { |
684 | .abreg = AB3100_IMRB2, | |
685 | .setting = 0xFF | |
686 | }, { | |
687 | .abreg = AB3100_IMRB3, | |
688 | .setting = 0xFF | |
689 | }, { | |
690 | .abreg = AB3100_SUP, | |
691 | .setting = 0x00 | |
692 | }, { | |
693 | .abreg = AB3100_DIS, | |
694 | .setting = 0xF0 | |
695 | }, { | |
696 | .abreg = AB3100_D0C, | |
697 | .setting = 0x00 | |
698 | }, { | |
699 | .abreg = AB3100_D1C, | |
700 | .setting = 0x00 | |
701 | }, { | |
702 | .abreg = AB3100_D2C, | |
703 | .setting = 0x00 | |
704 | }, { | |
705 | .abreg = AB3100_D3C, | |
706 | .setting = 0x00 | |
707 | }, | |
708 | }; | |
709 | ||
f791be49 | 710 | static int ab3100_setup(struct ab3100 *ab3100) |
14fa5691 LW |
711 | { |
712 | int err = 0; | |
713 | int i; | |
714 | ||
715 | for (i = 0; i < ARRAY_SIZE(ab3100_init_settings); i++) { | |
956f25a6 | 716 | err = ab3100_set_register_interruptible(ab3100, |
14fa5691 LW |
717 | ab3100_init_settings[i].abreg, |
718 | ab3100_init_settings[i].setting); | |
719 | if (err) | |
720 | goto exit_no_setup; | |
721 | } | |
722 | ||
723 | /* | |
724 | * Special trick to make the AB3100 use the 32kHz clock (RTC) | |
956f25a6 | 725 | * bit 3 in test register 0x02 is a special, undocumented test |
14fa5691 LW |
726 | * register bit that only exist in AB3100 P1E |
727 | */ | |
728 | if (ab3100->chip_id == 0xc4) { | |
729 | dev_warn(ab3100->dev, | |
730 | "AB3100 P1E variant detected, " | |
731 | "forcing chip to 32KHz\n"); | |
fa661258 MW |
732 | err = ab3100_set_test_register_interruptible(ab3100, |
733 | 0x02, 0x08); | |
14fa5691 LW |
734 | } |
735 | ||
736 | exit_no_setup: | |
737 | return err; | |
738 | } | |
739 | ||
8c96aefb LW |
740 | /* The subdevices of the AB3100 */ |
741 | static struct mfd_cell ab3100_devs[] = { | |
742 | { | |
743 | .name = "ab3100-dac", | |
744 | .id = -1, | |
745 | }, | |
746 | { | |
747 | .name = "ab3100-leds", | |
748 | .id = -1, | |
749 | }, | |
750 | { | |
751 | .name = "ab3100-power", | |
752 | .id = -1, | |
753 | }, | |
754 | { | |
755 | .name = "ab3100-regulators", | |
756 | .id = -1, | |
757 | }, | |
758 | { | |
759 | .name = "ab3100-sim", | |
760 | .id = -1, | |
761 | }, | |
762 | { | |
763 | .name = "ab3100-uart", | |
764 | .id = -1, | |
765 | }, | |
766 | { | |
767 | .name = "ab3100-rtc", | |
768 | .id = -1, | |
769 | }, | |
770 | { | |
771 | .name = "ab3100-charger", | |
772 | .id = -1, | |
773 | }, | |
774 | { | |
775 | .name = "ab3100-boost", | |
776 | .id = -1, | |
777 | }, | |
778 | { | |
779 | .name = "ab3100-adc", | |
780 | .id = -1, | |
781 | }, | |
782 | { | |
783 | .name = "ab3100-fuelgauge", | |
784 | .id = -1, | |
785 | }, | |
786 | { | |
787 | .name = "ab3100-vibrator", | |
788 | .id = -1, | |
789 | }, | |
790 | { | |
791 | .name = "ab3100-otp", | |
792 | .id = -1, | |
793 | }, | |
794 | { | |
795 | .name = "ab3100-codec", | |
796 | .id = -1, | |
797 | }, | |
14fa5691 LW |
798 | }; |
799 | ||
800 | struct ab_family_id { | |
801 | u8 id; | |
802 | char *name; | |
803 | }; | |
804 | ||
a73e5df1 | 805 | static const struct ab_family_id ids[] = { |
14fa5691 LW |
806 | /* AB3100 */ |
807 | { | |
808 | .id = 0xc0, | |
809 | .name = "P1A" | |
810 | }, { | |
811 | .id = 0xc1, | |
812 | .name = "P1B" | |
813 | }, { | |
814 | .id = 0xc2, | |
815 | .name = "P1C" | |
816 | }, { | |
817 | .id = 0xc3, | |
818 | .name = "P1D" | |
819 | }, { | |
820 | .id = 0xc4, | |
821 | .name = "P1E" | |
822 | }, { | |
823 | .id = 0xc5, | |
824 | .name = "P1F/R1A" | |
825 | }, { | |
826 | .id = 0xc6, | |
827 | .name = "P1G/R1A" | |
828 | }, { | |
829 | .id = 0xc7, | |
830 | .name = "P2A/R2A" | |
831 | }, { | |
832 | .id = 0xc8, | |
833 | .name = "P2B/R2B" | |
834 | }, | |
835 | /* AB3000 variants, not supported */ | |
836 | { | |
837 | .id = 0xa0 | |
838 | }, { | |
839 | .id = 0xa1 | |
840 | }, { | |
841 | .id = 0xa2 | |
842 | }, { | |
843 | .id = 0xa3 | |
844 | }, { | |
845 | .id = 0xa4 | |
846 | }, { | |
847 | .id = 0xa5 | |
848 | }, { | |
849 | .id = 0xa6 | |
850 | }, { | |
851 | .id = 0xa7 | |
852 | }, | |
853 | /* Terminator */ | |
854 | { | |
855 | .id = 0x00, | |
856 | }, | |
857 | }; | |
858 | ||
f791be49 | 859 | static int ab3100_probe(struct i2c_client *client, |
2524468e | 860 | const struct i2c_device_id *id) |
14fa5691 LW |
861 | { |
862 | struct ab3100 *ab3100; | |
d619bc14 LW |
863 | struct ab3100_platform_data *ab3100_plf_data = |
864 | client->dev.platform_data; | |
14fa5691 LW |
865 | int err; |
866 | int i; | |
867 | ||
7f0f07ce | 868 | ab3100 = devm_kzalloc(&client->dev, sizeof(struct ab3100), GFP_KERNEL); |
14fa5691 LW |
869 | if (!ab3100) { |
870 | dev_err(&client->dev, "could not allocate AB3100 device\n"); | |
871 | return -ENOMEM; | |
872 | } | |
873 | ||
874 | /* Initialize data structure */ | |
875 | mutex_init(&ab3100->access_mutex); | |
876 | BLOCKING_INIT_NOTIFIER_HEAD(&ab3100->event_subscribers); | |
877 | ||
878 | ab3100->i2c_client = client; | |
879 | ab3100->dev = &ab3100->i2c_client->dev; | |
880 | ||
881 | i2c_set_clientdata(client, ab3100); | |
882 | ||
883 | /* Read chip ID register */ | |
956f25a6 LW |
884 | err = ab3100_get_register_interruptible(ab3100, AB3100_CID, |
885 | &ab3100->chip_id); | |
14fa5691 LW |
886 | if (err) { |
887 | dev_err(&client->dev, | |
888 | "could not communicate with the AB3100 analog " | |
889 | "baseband chip\n"); | |
890 | goto exit_no_detect; | |
891 | } | |
892 | ||
893 | for (i = 0; ids[i].id != 0x0; i++) { | |
894 | if (ids[i].id == ab3100->chip_id) { | |
895 | if (ids[i].name != NULL) { | |
896 | snprintf(&ab3100->chip_name[0], | |
897 | sizeof(ab3100->chip_name) - 1, | |
898 | "AB3100 %s", | |
899 | ids[i].name); | |
900 | break; | |
901 | } else { | |
902 | dev_err(&client->dev, | |
903 | "AB3000 is not supported\n"); | |
904 | goto exit_no_detect; | |
905 | } | |
906 | } | |
907 | } | |
908 | ||
909 | if (ids[i].id == 0x0) { | |
910 | dev_err(&client->dev, "unknown analog baseband chip id: 0x%x\n", | |
911 | ab3100->chip_id); | |
912 | dev_err(&client->dev, "accepting it anyway. Please update " | |
913 | "the driver.\n"); | |
914 | goto exit_no_detect; | |
915 | } | |
916 | ||
917 | dev_info(&client->dev, "Detected chip: %s\n", | |
918 | &ab3100->chip_name[0]); | |
919 | ||
920 | /* Attach a second dummy i2c_client to the test register address */ | |
921 | ab3100->testreg_client = i2c_new_dummy(client->adapter, | |
7f0f07ce | 922 | client->addr + 1); |
14fa5691 LW |
923 | if (!ab3100->testreg_client) { |
924 | err = -ENOMEM; | |
925 | goto exit_no_testreg_client; | |
926 | } | |
927 | ||
14fa5691 LW |
928 | err = ab3100_setup(ab3100); |
929 | if (err) | |
930 | goto exit_no_setup; | |
931 | ||
7f0f07ce LW |
932 | err = devm_request_threaded_irq(&client->dev, |
933 | client->irq, NULL, ab3100_irq_handler, | |
934 | IRQF_ONESHOT, "ab3100-core", ab3100); | |
14fa5691 LW |
935 | if (err) |
936 | goto exit_no_irq; | |
937 | ||
fa661258 MW |
938 | err = abx500_register_ops(&client->dev, &ab3100_ops); |
939 | if (err) | |
940 | goto exit_no_ops; | |
941 | ||
8c96aefb | 942 | /* Set up and register the platform devices. */ |
a771e36e SO |
943 | for (i = 0; i < ARRAY_SIZE(ab3100_devs); i++) { |
944 | ab3100_devs[i].platform_data = ab3100_plf_data; | |
945 | ab3100_devs[i].pdata_size = sizeof(struct ab3100_platform_data); | |
946 | } | |
14fa5691 | 947 | |
8c96aefb | 948 | err = mfd_add_devices(&client->dev, 0, ab3100_devs, |
55692af5 | 949 | ARRAY_SIZE(ab3100_devs), NULL, 0, NULL); |
14fa5691 LW |
950 | |
951 | ab3100_setup_debugfs(ab3100); | |
952 | ||
953 | return 0; | |
954 | ||
fa661258 | 955 | exit_no_ops: |
14fa5691 LW |
956 | exit_no_irq: |
957 | exit_no_setup: | |
958 | i2c_unregister_device(ab3100->testreg_client); | |
959 | exit_no_testreg_client: | |
960 | exit_no_detect: | |
14fa5691 LW |
961 | return err; |
962 | } | |
963 | ||
4740f73f | 964 | static int ab3100_remove(struct i2c_client *client) |
14fa5691 LW |
965 | { |
966 | struct ab3100 *ab3100 = i2c_get_clientdata(client); | |
14fa5691 LW |
967 | |
968 | /* Unregister subdevices */ | |
8c96aefb | 969 | mfd_remove_devices(&client->dev); |
14fa5691 LW |
970 | ab3100_remove_debugfs(); |
971 | i2c_unregister_device(ab3100->testreg_client); | |
14fa5691 LW |
972 | return 0; |
973 | } | |
974 | ||
975 | static const struct i2c_device_id ab3100_id[] = { | |
dcffa125 | 976 | { "ab3100", 0 }, |
14fa5691 LW |
977 | { } |
978 | }; | |
979 | MODULE_DEVICE_TABLE(i2c, ab3100_id); | |
980 | ||
981 | static struct i2c_driver ab3100_driver = { | |
982 | .driver = { | |
983 | .name = "ab3100", | |
984 | .owner = THIS_MODULE, | |
985 | }, | |
986 | .id_table = ab3100_id, | |
987 | .probe = ab3100_probe, | |
84449216 | 988 | .remove = ab3100_remove, |
14fa5691 LW |
989 | }; |
990 | ||
991 | static int __init ab3100_i2c_init(void) | |
992 | { | |
993 | return i2c_add_driver(&ab3100_driver); | |
994 | } | |
995 | ||
996 | static void __exit ab3100_i2c_exit(void) | |
997 | { | |
998 | i2c_del_driver(&ab3100_driver); | |
999 | } | |
1000 | ||
1001 | subsys_initcall(ab3100_i2c_init); | |
1002 | module_exit(ab3100_i2c_exit); | |
1003 | ||
1004 | MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>"); | |
1005 | MODULE_DESCRIPTION("AB3100 core driver"); | |
1006 | MODULE_LICENSE("GPL"); |