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1 | /* |
2 | * sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $) |
3 | * |
4 | * Copyright (c) 2007 Alexey Starikovskiy <astarikovskiy@suse.de> |
5 | * Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com> |
6 | * Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu> |
7 | * |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify |
11 | * it under the terms of the GNU General Public License as published by |
12 | * the Free Software Foundation; either version 2 of the License, or (at |
13 | * your option) any later version. |
14 | * |
15 | * This program is distributed in the hope that it will be useful, but |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
18 | * General Public License for more details. |
19 | * |
20 | * You should have received a copy of the GNU General Public License along |
21 | * with this program; if not, write to the Free Software Foundation, Inc., |
22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
23 | * |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
25 | */ |
26 | |
27 | #include <linux/init.h> |
28 | #include <linux/slab.h> |
29 | #include <linux/module.h> |
30 | #include <linux/moduleparam.h> |
31 | #include <linux/kernel.h> |
32 | |
33 | #ifdef CONFIG_ACPI_PROCFS_POWER |
34 | #include <linux/proc_fs.h> |
35 | #include <linux/seq_file.h> |
36 | #include <asm/uaccess.h> |
37 | #endif |
38 | |
39 | #include <linux/acpi.h> |
40 | #include <linux/timer.h> |
41 | #include <linux/jiffies.h> |
42 | #include <linux/delay.h> |
43 | #include <linux/power_supply.h> |
44 | |
45 | #include "sbshc.h" |
46 | |
47 | #define PREFIX "ACPI: " |
48 | |
49 | #define ACPI_SBS_CLASS "sbs" |
50 | #define ACPI_AC_CLASS "ac_adapter" |
51 | #define ACPI_BATTERY_CLASS "battery" |
52 | #define ACPI_SBS_DEVICE_NAME "Smart Battery System" |
53 | #define ACPI_SBS_FILE_INFO "info" |
54 | #define ACPI_SBS_FILE_STATE "state" |
55 | #define ACPI_SBS_FILE_ALARM "alarm" |
56 | #define ACPI_BATTERY_DIR_NAME "BAT%i" |
57 | #define ACPI_AC_DIR_NAME "AC0" |
58 | |
59 | #define ACPI_SBS_NOTIFY_STATUS 0x80 |
60 | #define ACPI_SBS_NOTIFY_INFO 0x81 |
61 | |
62 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
63 | MODULE_DESCRIPTION("Smart Battery System ACPI interface driver"); |
64 | MODULE_LICENSE("GPL"); |
65 | |
66 | static unsigned int cache_time = 1000; |
67 | module_param(cache_time, uint, 0644); |
68 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); |
69 | |
70 | extern struct proc_dir_entry *acpi_lock_ac_dir(void); |
71 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
72 | extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir); |
73 | extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); |
74 | |
75 | #define MAX_SBS_BAT 4 |
76 | #define ACPI_SBS_BLOCK_MAX 32 |
77 | |
78 | static const struct acpi_device_id sbs_device_ids[] = { |
79 | {"ACPI0002", 0}, |
80 | {"", 0}, |
81 | }; |
82 | MODULE_DEVICE_TABLE(acpi, sbs_device_ids); |
83 | |
84 | struct acpi_battery { |
85 | struct power_supply bat; |
86 | struct acpi_sbs *sbs; |
87 | #ifdef CONFIG_ACPI_PROCFS_POWER |
88 | struct proc_dir_entry *proc_entry; |
89 | #endif |
90 | unsigned long update_time; |
91 | char name[8]; |
92 | char manufacturer_name[ACPI_SBS_BLOCK_MAX]; |
93 | char device_name[ACPI_SBS_BLOCK_MAX]; |
94 | char device_chemistry[ACPI_SBS_BLOCK_MAX]; |
95 | u16 alarm_capacity; |
96 | u16 full_charge_capacity; |
97 | u16 design_capacity; |
98 | u16 design_voltage; |
99 | u16 serial_number; |
100 | u16 cycle_count; |
101 | u16 temp_now; |
102 | u16 voltage_now; |
103 | s16 rate_now; |
104 | s16 rate_avg; |
105 | u16 capacity_now; |
106 | u16 state_of_charge; |
107 | u16 state; |
108 | u16 mode; |
109 | u16 spec; |
110 | u8 id; |
111 | u8 present:1; |
112 | u8 have_sysfs_alarm:1; |
113 | }; |
114 | |
115 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat) |
116 | |
117 | struct acpi_sbs { |
118 | struct power_supply charger; |
119 | struct acpi_device *device; |
120 | struct acpi_smb_hc *hc; |
121 | struct mutex lock; |
122 | #ifdef CONFIG_ACPI_PROCFS_POWER |
123 | struct proc_dir_entry *charger_entry; |
124 | #endif |
125 | struct acpi_battery battery[MAX_SBS_BAT]; |
126 | u8 batteries_supported:4; |
127 | u8 manager_present:1; |
128 | u8 charger_present:1; |
129 | }; |
130 | |
131 | #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger) |
132 | |
133 | static int acpi_sbs_remove(struct acpi_device *device); |
134 | static int acpi_battery_get_state(struct acpi_battery *battery); |
135 | |
136 | static inline int battery_scale(int log) |
137 | { |
138 | int scale = 1; |
139 | while (log--) |
140 | scale *= 10; |
141 | return scale; |
142 | } |
143 | |
144 | static inline int acpi_battery_vscale(struct acpi_battery *battery) |
145 | { |
146 | return battery_scale((battery->spec & 0x0f00) >> 8); |
147 | } |
148 | |
149 | static inline int acpi_battery_ipscale(struct acpi_battery *battery) |
150 | { |
151 | return battery_scale((battery->spec & 0xf000) >> 12); |
152 | } |
153 | |
154 | static inline int acpi_battery_mode(struct acpi_battery *battery) |
155 | { |
156 | return (battery->mode & 0x8000); |
157 | } |
158 | |
159 | static inline int acpi_battery_scale(struct acpi_battery *battery) |
160 | { |
161 | return (acpi_battery_mode(battery) ? 10 : 1) * |
162 | acpi_battery_ipscale(battery); |
163 | } |
164 | |
165 | static int sbs_get_ac_property(struct power_supply *psy, |
166 | enum power_supply_property psp, |
167 | union power_supply_propval *val) |
168 | { |
169 | struct acpi_sbs *sbs = to_acpi_sbs(psy); |
170 | switch (psp) { |
171 | case POWER_SUPPLY_PROP_ONLINE: |
172 | val->intval = sbs->charger_present; |
173 | break; |
174 | default: |
175 | return -EINVAL; |
176 | } |
177 | return 0; |
178 | } |
179 | |
180 | static int acpi_battery_technology(struct acpi_battery *battery) |
181 | { |
182 | if (!strcasecmp("NiCd", battery->device_chemistry)) |
183 | return POWER_SUPPLY_TECHNOLOGY_NiCd; |
184 | if (!strcasecmp("NiMH", battery->device_chemistry)) |
185 | return POWER_SUPPLY_TECHNOLOGY_NiMH; |
186 | if (!strcasecmp("LION", battery->device_chemistry)) |
187 | return POWER_SUPPLY_TECHNOLOGY_LION; |
188 | if (!strcasecmp("LiP", battery->device_chemistry)) |
189 | return POWER_SUPPLY_TECHNOLOGY_LIPO; |
190 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; |
191 | } |
192 | |
193 | static int acpi_sbs_battery_get_property(struct power_supply *psy, |
194 | enum power_supply_property psp, |
195 | union power_supply_propval *val) |
196 | { |
197 | struct acpi_battery *battery = to_acpi_battery(psy); |
198 | |
199 | if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT) |
200 | return -ENODEV; |
201 | |
202 | acpi_battery_get_state(battery); |
203 | switch (psp) { |
204 | case POWER_SUPPLY_PROP_STATUS: |
205 | if (battery->rate_now < 0) |
206 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
207 | else if (battery->rate_now > 0) |
208 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
209 | else |
210 | val->intval = POWER_SUPPLY_STATUS_FULL; |
211 | break; |
212 | case POWER_SUPPLY_PROP_PRESENT: |
213 | val->intval = battery->present; |
214 | break; |
215 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
216 | val->intval = acpi_battery_technology(battery); |
217 | break; |
218 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
219 | val->intval = battery->cycle_count; |
220 | break; |
221 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
222 | val->intval = battery->design_voltage * |
223 | acpi_battery_vscale(battery) * 1000; |
224 | break; |
225 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
226 | val->intval = battery->voltage_now * |
227 | acpi_battery_vscale(battery) * 1000; |
228 | break; |
229 | case POWER_SUPPLY_PROP_CURRENT_NOW: |
230 | case POWER_SUPPLY_PROP_POWER_NOW: |
231 | val->intval = abs(battery->rate_now) * |
232 | acpi_battery_ipscale(battery) * 1000; |
233 | val->intval *= (acpi_battery_mode(battery)) ? |
234 | (battery->voltage_now * |
235 | acpi_battery_vscale(battery) / 1000) : 1; |
236 | break; |
237 | case POWER_SUPPLY_PROP_CURRENT_AVG: |
238 | case POWER_SUPPLY_PROP_POWER_AVG: |
239 | val->intval = abs(battery->rate_avg) * |
240 | acpi_battery_ipscale(battery) * 1000; |
241 | val->intval *= (acpi_battery_mode(battery)) ? |
242 | (battery->voltage_now * |
243 | acpi_battery_vscale(battery) / 1000) : 1; |
244 | break; |
245 | case POWER_SUPPLY_PROP_CAPACITY: |
246 | val->intval = battery->state_of_charge; |
247 | break; |
248 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
249 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
250 | val->intval = battery->design_capacity * |
251 | acpi_battery_scale(battery) * 1000; |
252 | break; |
253 | case POWER_SUPPLY_PROP_CHARGE_FULL: |
254 | case POWER_SUPPLY_PROP_ENERGY_FULL: |
255 | val->intval = battery->full_charge_capacity * |
256 | acpi_battery_scale(battery) * 1000; |
257 | break; |
258 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
259 | case POWER_SUPPLY_PROP_ENERGY_NOW: |
260 | val->intval = battery->capacity_now * |
261 | acpi_battery_scale(battery) * 1000; |
262 | break; |
263 | case POWER_SUPPLY_PROP_TEMP: |
264 | val->intval = battery->temp_now - 2730; // dK -> dC |
265 | break; |
266 | case POWER_SUPPLY_PROP_MODEL_NAME: |
267 | val->strval = battery->device_name; |
268 | break; |
269 | case POWER_SUPPLY_PROP_MANUFACTURER: |
270 | val->strval = battery->manufacturer_name; |
271 | break; |
272 | default: |
273 | return -EINVAL; |
274 | } |
275 | return 0; |
276 | } |
277 | |
278 | static enum power_supply_property sbs_ac_props[] = { |
279 | POWER_SUPPLY_PROP_ONLINE, |
280 | }; |
281 | |
282 | static enum power_supply_property sbs_charge_battery_props[] = { |
283 | POWER_SUPPLY_PROP_STATUS, |
284 | POWER_SUPPLY_PROP_PRESENT, |
285 | POWER_SUPPLY_PROP_TECHNOLOGY, |
286 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
287 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
288 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
289 | POWER_SUPPLY_PROP_CURRENT_NOW, |
290 | POWER_SUPPLY_PROP_CURRENT_AVG, |
291 | POWER_SUPPLY_PROP_CAPACITY, |
292 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
293 | POWER_SUPPLY_PROP_CHARGE_FULL, |
294 | POWER_SUPPLY_PROP_CHARGE_NOW, |
295 | POWER_SUPPLY_PROP_TEMP, |
296 | POWER_SUPPLY_PROP_MODEL_NAME, |
297 | POWER_SUPPLY_PROP_MANUFACTURER, |
298 | }; |
299 | |
300 | static enum power_supply_property sbs_energy_battery_props[] = { |
301 | POWER_SUPPLY_PROP_STATUS, |
302 | POWER_SUPPLY_PROP_PRESENT, |
303 | POWER_SUPPLY_PROP_TECHNOLOGY, |
304 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
305 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
306 | POWER_SUPPLY_PROP_CURRENT_NOW, |
307 | POWER_SUPPLY_PROP_CURRENT_AVG, |
308 | POWER_SUPPLY_PROP_POWER_NOW, |
309 | POWER_SUPPLY_PROP_POWER_AVG, |
310 | POWER_SUPPLY_PROP_CAPACITY, |
311 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
312 | POWER_SUPPLY_PROP_ENERGY_FULL, |
313 | POWER_SUPPLY_PROP_ENERGY_NOW, |
314 | POWER_SUPPLY_PROP_TEMP, |
315 | POWER_SUPPLY_PROP_MODEL_NAME, |
316 | POWER_SUPPLY_PROP_MANUFACTURER, |
317 | }; |
318 | |
319 | |
320 | /* -------------------------------------------------------------------------- |
321 | Smart Battery System Management |
322 | -------------------------------------------------------------------------- */ |
323 | |
324 | struct acpi_battery_reader { |
325 | u8 command; /* command for battery */ |
326 | u8 mode; /* word or block? */ |
327 | size_t offset; /* offset inside struct acpi_sbs_battery */ |
328 | }; |
329 | |
330 | static struct acpi_battery_reader info_readers[] = { |
331 | {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)}, |
332 | {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)}, |
333 | {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)}, |
334 | {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)}, |
335 | {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)}, |
336 | {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)}, |
337 | {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)}, |
338 | {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)}, |
339 | {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)}, |
340 | {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)}, |
341 | {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)}, |
342 | }; |
343 | |
344 | static struct acpi_battery_reader state_readers[] = { |
345 | {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)}, |
346 | {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)}, |
347 | {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)}, |
348 | {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)}, |
349 | {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)}, |
350 | {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)}, |
351 | {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)}, |
352 | }; |
353 | |
354 | static int acpi_manager_get_info(struct acpi_sbs *sbs) |
355 | { |
356 | int result = 0; |
357 | u16 battery_system_info; |
358 | |
359 | result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, |
360 | 0x04, (u8 *)&battery_system_info); |
361 | if (!result) |
362 | sbs->batteries_supported = battery_system_info & 0x000f; |
363 | return result; |
364 | } |
365 | |
366 | static int acpi_battery_get_info(struct acpi_battery *battery) |
367 | { |
368 | int i, result = 0; |
369 | |
370 | for (i = 0; i < ARRAY_SIZE(info_readers); ++i) { |
371 | result = acpi_smbus_read(battery->sbs->hc, |
372 | info_readers[i].mode, |
373 | ACPI_SBS_BATTERY, |
374 | info_readers[i].command, |
375 | (u8 *) battery + |
376 | info_readers[i].offset); |
377 | if (result) |
378 | break; |
379 | } |
380 | return result; |
381 | } |
382 | |
383 | static int acpi_battery_get_state(struct acpi_battery *battery) |
384 | { |
385 | int i, result = 0; |
386 | |
387 | if (battery->update_time && |
388 | time_before(jiffies, battery->update_time + |
389 | msecs_to_jiffies(cache_time))) |
390 | return 0; |
391 | for (i = 0; i < ARRAY_SIZE(state_readers); ++i) { |
392 | result = acpi_smbus_read(battery->sbs->hc, |
393 | state_readers[i].mode, |
394 | ACPI_SBS_BATTERY, |
395 | state_readers[i].command, |
396 | (u8 *)battery + |
397 | state_readers[i].offset); |
398 | if (result) |
399 | goto end; |
400 | } |
401 | end: |
402 | battery->update_time = jiffies; |
403 | return result; |
404 | } |
405 | |
406 | static int acpi_battery_get_alarm(struct acpi_battery *battery) |
407 | { |
408 | return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, |
409 | ACPI_SBS_BATTERY, 0x01, |
410 | (u8 *)&battery->alarm_capacity); |
411 | } |
412 | |
413 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
414 | { |
415 | struct acpi_sbs *sbs = battery->sbs; |
416 | u16 value, sel = 1 << (battery->id + 12); |
417 | |
418 | int ret; |
419 | |
420 | |
421 | if (sbs->manager_present) { |
422 | ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, |
423 | 0x01, (u8 *)&value); |
424 | if (ret) |
425 | goto end; |
426 | if ((value & 0xf000) != sel) { |
427 | value &= 0x0fff; |
428 | value |= sel; |
429 | ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, |
430 | ACPI_SBS_MANAGER, |
431 | 0x01, (u8 *)&value, 2); |
432 | if (ret) |
433 | goto end; |
434 | } |
435 | } |
436 | ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY, |
437 | 0x01, (u8 *)&battery->alarm_capacity, 2); |
438 | end: |
439 | return ret; |
440 | } |
441 | |
442 | static int acpi_ac_get_present(struct acpi_sbs *sbs) |
443 | { |
444 | int result; |
445 | u16 status; |
446 | |
447 | result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER, |
448 | 0x13, (u8 *) & status); |
449 | if (!result) |
450 | sbs->charger_present = (status >> 15) & 0x1; |
451 | return result; |
452 | } |
453 | |
454 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
455 | struct device_attribute *attr, |
456 | char *buf) |
457 | { |
458 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
459 | acpi_battery_get_alarm(battery); |
460 | return sprintf(buf, "%d\n", battery->alarm_capacity * |
461 | acpi_battery_scale(battery) * 1000); |
462 | } |
463 | |
464 | static ssize_t acpi_battery_alarm_store(struct device *dev, |
465 | struct device_attribute *attr, |
466 | const char *buf, size_t count) |
467 | { |
468 | unsigned long x; |
469 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
470 | if (sscanf(buf, "%ld\n", &x) == 1) |
471 | battery->alarm_capacity = x / |
472 | (1000 * acpi_battery_scale(battery)); |
473 | if (battery->present) |
474 | acpi_battery_set_alarm(battery); |
475 | return count; |
476 | } |
477 | |
478 | static struct device_attribute alarm_attr = { |
479 | .attr = {.name = "alarm", .mode = 0644}, |
480 | .show = acpi_battery_alarm_show, |
481 | .store = acpi_battery_alarm_store, |
482 | }; |
483 | |
484 | /* -------------------------------------------------------------------------- |
485 | FS Interface (/proc/acpi) |
486 | -------------------------------------------------------------------------- */ |
487 | |
488 | #ifdef CONFIG_ACPI_PROCFS_POWER |
489 | /* Generic Routines */ |
490 | static int |
491 | acpi_sbs_add_fs(struct proc_dir_entry **dir, |
492 | struct proc_dir_entry *parent_dir, |
493 | char *dir_name, |
494 | const struct file_operations *info_fops, |
495 | const struct file_operations *state_fops, |
496 | const struct file_operations *alarm_fops, void *data) |
497 | { |
498 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for SBS is loaded," |
499 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); |
500 | if (!*dir) { |
501 | *dir = proc_mkdir(dir_name, parent_dir); |
502 | if (!*dir) { |
503 | return -ENODEV; |
504 | } |
505 | } |
506 | |
507 | /* 'info' [R] */ |
508 | if (info_fops) |
509 | proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir, |
510 | info_fops, data); |
511 | |
512 | /* 'state' [R] */ |
513 | if (state_fops) |
514 | proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir, |
515 | state_fops, data); |
516 | |
517 | /* 'alarm' [R/W] */ |
518 | if (alarm_fops) |
519 | proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir, |
520 | alarm_fops, data); |
521 | return 0; |
522 | } |
523 | |
524 | static void |
525 | acpi_sbs_remove_fs(struct proc_dir_entry **dir, |
526 | struct proc_dir_entry *parent_dir) |
527 | { |
528 | if (*dir) { |
529 | remove_proc_entry(ACPI_SBS_FILE_INFO, *dir); |
530 | remove_proc_entry(ACPI_SBS_FILE_STATE, *dir); |
531 | remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir); |
532 | remove_proc_entry((*dir)->name, parent_dir); |
533 | *dir = NULL; |
534 | } |
535 | } |
536 | |
537 | /* Smart Battery Interface */ |
538 | static struct proc_dir_entry *acpi_battery_dir = NULL; |
539 | |
540 | static inline char *acpi_battery_units(struct acpi_battery *battery) |
541 | { |
542 | return acpi_battery_mode(battery) ? " mW" : " mA"; |
543 | } |
544 | |
545 | |
546 | static int acpi_battery_read_info(struct seq_file *seq, void *offset) |
547 | { |
548 | struct acpi_battery *battery = seq->private; |
549 | struct acpi_sbs *sbs = battery->sbs; |
550 | int result = 0; |
551 | |
552 | mutex_lock(&sbs->lock); |
553 | |
554 | seq_printf(seq, "present: %s\n", |
555 | (battery->present) ? "yes" : "no"); |
556 | if (!battery->present) |
557 | goto end; |
558 | |
559 | seq_printf(seq, "design capacity: %i%sh\n", |
560 | battery->design_capacity * acpi_battery_scale(battery), |
561 | acpi_battery_units(battery)); |
562 | seq_printf(seq, "last full capacity: %i%sh\n", |
563 | battery->full_charge_capacity * acpi_battery_scale(battery), |
564 | acpi_battery_units(battery)); |
565 | seq_printf(seq, "battery technology: rechargeable\n"); |
566 | seq_printf(seq, "design voltage: %i mV\n", |
567 | battery->design_voltage * acpi_battery_vscale(battery)); |
568 | seq_printf(seq, "design capacity warning: unknown\n"); |
569 | seq_printf(seq, "design capacity low: unknown\n"); |
570 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); |
571 | seq_printf(seq, "capacity granularity 1: unknown\n"); |
572 | seq_printf(seq, "capacity granularity 2: unknown\n"); |
573 | seq_printf(seq, "model number: %s\n", battery->device_name); |
574 | seq_printf(seq, "serial number: %i\n", |
575 | battery->serial_number); |
576 | seq_printf(seq, "battery type: %s\n", |
577 | battery->device_chemistry); |
578 | seq_printf(seq, "OEM info: %s\n", |
579 | battery->manufacturer_name); |
580 | end: |
581 | mutex_unlock(&sbs->lock); |
582 | return result; |
583 | } |
584 | |
585 | static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) |
586 | { |
587 | return single_open(file, acpi_battery_read_info, PDE(inode)->data); |
588 | } |
589 | |
590 | static int acpi_battery_read_state(struct seq_file *seq, void *offset) |
591 | { |
592 | struct acpi_battery *battery = seq->private; |
593 | struct acpi_sbs *sbs = battery->sbs; |
594 | int rate; |
595 | |
596 | mutex_lock(&sbs->lock); |
597 | seq_printf(seq, "present: %s\n", |
598 | (battery->present) ? "yes" : "no"); |
599 | if (!battery->present) |
600 | goto end; |
601 | |
602 | acpi_battery_get_state(battery); |
603 | seq_printf(seq, "capacity state: %s\n", |
604 | (battery->state & 0x0010) ? "critical" : "ok"); |
605 | seq_printf(seq, "charging state: %s\n", |
606 | (battery->rate_now < 0) ? "discharging" : |
607 | ((battery->rate_now > 0) ? "charging" : "charged")); |
608 | rate = abs(battery->rate_now) * acpi_battery_ipscale(battery); |
609 | rate *= (acpi_battery_mode(battery))?(battery->voltage_now * |
610 | acpi_battery_vscale(battery)/1000):1; |
611 | seq_printf(seq, "present rate: %d%s\n", rate, |
612 | acpi_battery_units(battery)); |
613 | seq_printf(seq, "remaining capacity: %i%sh\n", |
614 | battery->capacity_now * acpi_battery_scale(battery), |
615 | acpi_battery_units(battery)); |
616 | seq_printf(seq, "present voltage: %i mV\n", |
617 | battery->voltage_now * acpi_battery_vscale(battery)); |
618 | |
619 | end: |
620 | mutex_unlock(&sbs->lock); |
621 | return 0; |
622 | } |
623 | |
624 | static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) |
625 | { |
626 | return single_open(file, acpi_battery_read_state, PDE(inode)->data); |
627 | } |
628 | |
629 | static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) |
630 | { |
631 | struct acpi_battery *battery = seq->private; |
632 | struct acpi_sbs *sbs = battery->sbs; |
633 | int result = 0; |
634 | |
635 | mutex_lock(&sbs->lock); |
636 | |
637 | if (!battery->present) { |
638 | seq_printf(seq, "present: no\n"); |
639 | goto end; |
640 | } |
641 | |
642 | acpi_battery_get_alarm(battery); |
643 | seq_printf(seq, "alarm: "); |
644 | if (battery->alarm_capacity) |
645 | seq_printf(seq, "%i%sh\n", |
646 | battery->alarm_capacity * |
647 | acpi_battery_scale(battery), |
648 | acpi_battery_units(battery)); |
649 | else |
650 | seq_printf(seq, "disabled\n"); |
651 | end: |
652 | mutex_unlock(&sbs->lock); |
653 | return result; |
654 | } |
655 | |
656 | static ssize_t |
657 | acpi_battery_write_alarm(struct file *file, const char __user * buffer, |
658 | size_t count, loff_t * ppos) |
659 | { |
660 | struct seq_file *seq = file->private_data; |
661 | struct acpi_battery *battery = seq->private; |
662 | struct acpi_sbs *sbs = battery->sbs; |
663 | char alarm_string[12] = { '\0' }; |
664 | int result = 0; |
665 | mutex_lock(&sbs->lock); |
666 | if (!battery->present) { |
667 | result = -ENODEV; |
668 | goto end; |
669 | } |
670 | if (count > sizeof(alarm_string) - 1) { |
671 | result = -EINVAL; |
672 | goto end; |
673 | } |
674 | if (copy_from_user(alarm_string, buffer, count)) { |
675 | result = -EFAULT; |
676 | goto end; |
677 | } |
678 | alarm_string[count] = 0; |
679 | battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) / |
680 | acpi_battery_scale(battery); |
681 | acpi_battery_set_alarm(battery); |
682 | end: |
683 | mutex_unlock(&sbs->lock); |
684 | if (result) |
685 | return result; |
686 | return count; |
687 | } |
688 | |
689 | static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) |
690 | { |
691 | return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); |
692 | } |
693 | |
694 | static const struct file_operations acpi_battery_info_fops = { |
695 | .open = acpi_battery_info_open_fs, |
696 | .read = seq_read, |
697 | .llseek = seq_lseek, |
698 | .release = single_release, |
699 | .owner = THIS_MODULE, |
700 | }; |
701 | |
702 | static const struct file_operations acpi_battery_state_fops = { |
703 | .open = acpi_battery_state_open_fs, |
704 | .read = seq_read, |
705 | .llseek = seq_lseek, |
706 | .release = single_release, |
707 | .owner = THIS_MODULE, |
708 | }; |
709 | |
710 | static const struct file_operations acpi_battery_alarm_fops = { |
711 | .open = acpi_battery_alarm_open_fs, |
712 | .read = seq_read, |
713 | .write = acpi_battery_write_alarm, |
714 | .llseek = seq_lseek, |
715 | .release = single_release, |
716 | .owner = THIS_MODULE, |
717 | }; |
718 | |
719 | /* Legacy AC Adapter Interface */ |
720 | |
721 | static struct proc_dir_entry *acpi_ac_dir = NULL; |
722 | |
723 | static int acpi_ac_read_state(struct seq_file *seq, void *offset) |
724 | { |
725 | |
726 | struct acpi_sbs *sbs = seq->private; |
727 | |
728 | mutex_lock(&sbs->lock); |
729 | |
730 | seq_printf(seq, "state: %s\n", |
731 | sbs->charger_present ? "on-line" : "off-line"); |
732 | |
733 | mutex_unlock(&sbs->lock); |
734 | return 0; |
735 | } |
736 | |
737 | static int acpi_ac_state_open_fs(struct inode *inode, struct file *file) |
738 | { |
739 | return single_open(file, acpi_ac_read_state, PDE(inode)->data); |
740 | } |
741 | |
742 | static const struct file_operations acpi_ac_state_fops = { |
743 | .open = acpi_ac_state_open_fs, |
744 | .read = seq_read, |
745 | .llseek = seq_lseek, |
746 | .release = single_release, |
747 | .owner = THIS_MODULE, |
748 | }; |
749 | |
750 | #endif |
751 | |
752 | /* -------------------------------------------------------------------------- |
753 | Driver Interface |
754 | -------------------------------------------------------------------------- */ |
755 | static int acpi_battery_read(struct acpi_battery *battery) |
756 | { |
757 | int result = 0, saved_present = battery->present; |
758 | u16 state; |
759 | |
760 | if (battery->sbs->manager_present) { |
761 | result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, |
762 | ACPI_SBS_MANAGER, 0x01, (u8 *)&state); |
763 | if (!result) |
764 | battery->present = state & (1 << battery->id); |
765 | state &= 0x0fff; |
766 | state |= 1 << (battery->id + 12); |
767 | acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, |
768 | ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2); |
769 | } else if (battery->id == 0) |
770 | battery->present = 1; |
771 | if (result || !battery->present) |
772 | return result; |
773 | |
774 | if (saved_present != battery->present) { |
775 | battery->update_time = 0; |
776 | result = acpi_battery_get_info(battery); |
777 | if (result) |
778 | return result; |
779 | } |
780 | result = acpi_battery_get_state(battery); |
781 | return result; |
782 | } |
783 | |
784 | /* Smart Battery */ |
785 | static int acpi_battery_add(struct acpi_sbs *sbs, int id) |
786 | { |
787 | struct acpi_battery *battery = &sbs->battery[id]; |
788 | int result; |
789 | |
790 | battery->id = id; |
791 | battery->sbs = sbs; |
792 | result = acpi_battery_read(battery); |
793 | if (result) |
794 | return result; |
795 | |
796 | sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id); |
797 | #ifdef CONFIG_ACPI_PROCFS_POWER |
798 | acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir, |
799 | battery->name, &acpi_battery_info_fops, |
800 | &acpi_battery_state_fops, &acpi_battery_alarm_fops, |
801 | battery); |
802 | #endif |
803 | battery->bat.name = battery->name; |
804 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; |
805 | if (!acpi_battery_mode(battery)) { |
806 | battery->bat.properties = sbs_charge_battery_props; |
807 | battery->bat.num_properties = |
808 | ARRAY_SIZE(sbs_charge_battery_props); |
809 | } else { |
810 | battery->bat.properties = sbs_energy_battery_props; |
811 | battery->bat.num_properties = |
812 | ARRAY_SIZE(sbs_energy_battery_props); |
813 | } |
814 | battery->bat.get_property = acpi_sbs_battery_get_property; |
815 | result = power_supply_register(&sbs->device->dev, &battery->bat); |
816 | if (result) |
817 | goto end; |
818 | result = device_create_file(battery->bat.dev, &alarm_attr); |
819 | if (result) |
820 | goto end; |
821 | battery->have_sysfs_alarm = 1; |
822 | end: |
823 | printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n", |
824 | ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), |
825 | battery->name, battery->present ? "present" : "absent"); |
826 | return result; |
827 | } |
828 | |
829 | static void acpi_battery_remove(struct acpi_sbs *sbs, int id) |
830 | { |
831 | struct acpi_battery *battery = &sbs->battery[id]; |
832 | |
833 | if (battery->bat.dev) { |
834 | if (battery->have_sysfs_alarm) |
835 | device_remove_file(battery->bat.dev, &alarm_attr); |
836 | power_supply_unregister(&battery->bat); |
837 | } |
838 | #ifdef CONFIG_ACPI_PROCFS_POWER |
839 | if (battery->proc_entry) |
840 | acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir); |
841 | #endif |
842 | } |
843 | |
844 | static int acpi_charger_add(struct acpi_sbs *sbs) |
845 | { |
846 | int result; |
847 | |
848 | result = acpi_ac_get_present(sbs); |
849 | if (result) |
850 | goto end; |
851 | #ifdef CONFIG_ACPI_PROCFS_POWER |
852 | result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir, |
853 | ACPI_AC_DIR_NAME, NULL, |
854 | &acpi_ac_state_fops, NULL, sbs); |
855 | if (result) |
856 | goto end; |
857 | #endif |
858 | sbs->charger.name = "sbs-charger"; |
859 | sbs->charger.type = POWER_SUPPLY_TYPE_MAINS; |
860 | sbs->charger.properties = sbs_ac_props; |
861 | sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props); |
862 | sbs->charger.get_property = sbs_get_ac_property; |
863 | power_supply_register(&sbs->device->dev, &sbs->charger); |
864 | printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n", |
865 | ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), |
866 | ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line"); |
867 | end: |
868 | return result; |
869 | } |
870 | |
871 | static void acpi_charger_remove(struct acpi_sbs *sbs) |
872 | { |
873 | if (sbs->charger.dev) |
874 | power_supply_unregister(&sbs->charger); |
875 | #ifdef CONFIG_ACPI_PROCFS_POWER |
876 | if (sbs->charger_entry) |
877 | acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir); |
878 | #endif |
879 | } |
880 | |
881 | static void acpi_sbs_callback(void *context) |
882 | { |
883 | int id; |
884 | struct acpi_sbs *sbs = context; |
885 | struct acpi_battery *bat; |
886 | u8 saved_charger_state = sbs->charger_present; |
887 | u8 saved_battery_state; |
888 | acpi_ac_get_present(sbs); |
889 | if (sbs->charger_present != saved_charger_state) { |
890 | #ifdef CONFIG_ACPI_PROC_EVENT |
891 | acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME, |
892 | ACPI_SBS_NOTIFY_STATUS, |
893 | sbs->charger_present); |
894 | #endif |
895 | kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE); |
896 | } |
897 | if (sbs->manager_present) { |
898 | for (id = 0; id < MAX_SBS_BAT; ++id) { |
899 | if (!(sbs->batteries_supported & (1 << id))) |
900 | continue; |
901 | bat = &sbs->battery[id]; |
902 | saved_battery_state = bat->present; |
903 | acpi_battery_read(bat); |
904 | if (saved_battery_state == bat->present) |
905 | continue; |
906 | #ifdef CONFIG_ACPI_PROC_EVENT |
907 | acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS, |
908 | bat->name, |
909 | ACPI_SBS_NOTIFY_STATUS, |
910 | bat->present); |
911 | #endif |
912 | kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE); |
913 | } |
914 | } |
915 | } |
916 | |
917 | static int acpi_sbs_add(struct acpi_device *device) |
918 | { |
919 | struct acpi_sbs *sbs; |
920 | int result = 0; |
921 | int id; |
922 | |
923 | sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL); |
924 | if (!sbs) { |
925 | result = -ENOMEM; |
926 | goto end; |
927 | } |
928 | |
929 | mutex_init(&sbs->lock); |
930 | |
931 | sbs->hc = acpi_driver_data(device->parent); |
932 | sbs->device = device; |
933 | strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); |
934 | strcpy(acpi_device_class(device), ACPI_SBS_CLASS); |
935 | device->driver_data = sbs; |
936 | |
937 | result = acpi_charger_add(sbs); |
938 | if (result) |
939 | goto end; |
940 | |
941 | result = acpi_manager_get_info(sbs); |
942 | if (!result) { |
943 | sbs->manager_present = 1; |
944 | for (id = 0; id < MAX_SBS_BAT; ++id) |
945 | if ((sbs->batteries_supported & (1 << id))) |
946 | acpi_battery_add(sbs, id); |
947 | } else |
948 | acpi_battery_add(sbs, 0); |
949 | acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs); |
950 | end: |
951 | if (result) |
952 | acpi_sbs_remove(device); |
953 | return result; |
954 | } |
955 | |
956 | static int acpi_sbs_remove(struct acpi_device *device) |
957 | { |
958 | struct acpi_sbs *sbs; |
959 | int id; |
960 | |
961 | if (!device) |
962 | return -EINVAL; |
963 | sbs = acpi_driver_data(device); |
964 | if (!sbs) |
965 | return -EINVAL; |
966 | mutex_lock(&sbs->lock); |
967 | acpi_smbus_unregister_callback(sbs->hc); |
968 | for (id = 0; id < MAX_SBS_BAT; ++id) |
969 | acpi_battery_remove(sbs, id); |
970 | acpi_charger_remove(sbs); |
971 | mutex_unlock(&sbs->lock); |
972 | mutex_destroy(&sbs->lock); |
973 | kfree(sbs); |
974 | return 0; |
975 | } |
976 | |
977 | static void acpi_sbs_rmdirs(void) |
978 | { |
979 | #ifdef CONFIG_ACPI_PROCFS_POWER |
980 | if (acpi_ac_dir) { |
981 | acpi_unlock_ac_dir(acpi_ac_dir); |
982 | acpi_ac_dir = NULL; |
983 | } |
984 | if (acpi_battery_dir) { |
985 | acpi_unlock_battery_dir(acpi_battery_dir); |
986 | acpi_battery_dir = NULL; |
987 | } |
988 | #endif |
989 | } |
990 | |
991 | #ifdef CONFIG_PM_SLEEP |
992 | static int acpi_sbs_resume(struct device *dev) |
993 | { |
994 | struct acpi_sbs *sbs; |
995 | if (!dev) |
996 | return -EINVAL; |
997 | sbs = to_acpi_device(dev)->driver_data; |
998 | acpi_sbs_callback(sbs); |
999 | return 0; |
1000 | } |
1001 | #endif |
1002 | |
1003 | static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume); |
1004 | |
1005 | static struct acpi_driver acpi_sbs_driver = { |
1006 | .name = "sbs", |
1007 | .class = ACPI_SBS_CLASS, |
1008 | .ids = sbs_device_ids, |
1009 | .ops = { |
1010 | .add = acpi_sbs_add, |
1011 | .remove = acpi_sbs_remove, |
1012 | }, |
1013 | .drv.pm = &acpi_sbs_pm, |
1014 | }; |
1015 | |
1016 | static int __init acpi_sbs_init(void) |
1017 | { |
1018 | int result = 0; |
1019 | |
1020 | if (acpi_disabled) |
1021 | return -ENODEV; |
1022 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1023 | acpi_ac_dir = acpi_lock_ac_dir(); |
1024 | if (!acpi_ac_dir) |
1025 | return -ENODEV; |
1026 | acpi_battery_dir = acpi_lock_battery_dir(); |
1027 | if (!acpi_battery_dir) { |
1028 | acpi_sbs_rmdirs(); |
1029 | return -ENODEV; |
1030 | } |
1031 | #endif |
1032 | result = acpi_bus_register_driver(&acpi_sbs_driver); |
1033 | if (result < 0) { |
1034 | acpi_sbs_rmdirs(); |
1035 | return -ENODEV; |
1036 | } |
1037 | return 0; |
1038 | } |
1039 | |
1040 | static void __exit acpi_sbs_exit(void) |
1041 | { |
1042 | acpi_bus_unregister_driver(&acpi_sbs_driver); |
1043 | acpi_sbs_rmdirs(); |
1044 | return; |
1045 | } |
1046 | |
1047 | module_init(acpi_sbs_init); |
1048 | module_exit(acpi_sbs_exit); |
1049 |
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