1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $) |
4 | * |
5 | * Copyright (c) 2007 Alexey Starikovskiy <astarikovskiy@suse.de> |
6 | * Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com> |
7 | * Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu> |
8 | */ |
9 | |
10 | #define pr_fmt(fmt) "ACPI: " fmt |
11 | |
12 | #include <linux/init.h> |
13 | #include <linux/slab.h> |
14 | #include <linux/module.h> |
15 | #include <linux/moduleparam.h> |
16 | #include <linux/kernel.h> |
17 | |
18 | #include <linux/acpi.h> |
19 | #include <linux/timer.h> |
20 | #include <linux/jiffies.h> |
21 | #include <linux/delay.h> |
22 | #include <linux/power_supply.h> |
23 | #include <linux/platform_data/x86/apple.h> |
24 | #include <acpi/battery.h> |
25 | |
26 | #include "sbshc.h" |
27 | |
28 | #define ACPI_SBS_CLASS "sbs" |
29 | #define ACPI_AC_CLASS "ac_adapter" |
30 | #define ACPI_SBS_DEVICE_NAME "Smart Battery System" |
31 | #define ACPI_BATTERY_DIR_NAME "BAT%i" |
32 | #define ACPI_AC_DIR_NAME "AC0" |
33 | |
34 | #define ACPI_SBS_NOTIFY_STATUS 0x80 |
35 | #define ACPI_SBS_NOTIFY_INFO 0x81 |
36 | |
37 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>" ); |
38 | MODULE_DESCRIPTION("Smart Battery System ACPI interface driver" ); |
39 | MODULE_LICENSE("GPL" ); |
40 | |
41 | static unsigned int cache_time = 1000; |
42 | module_param(cache_time, uint, 0644); |
43 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds" ); |
44 | |
45 | #define MAX_SBS_BAT 4 |
46 | #define ACPI_SBS_BLOCK_MAX 32 |
47 | |
48 | static const struct acpi_device_id sbs_device_ids[] = { |
49 | {"ACPI0002" , 0}, |
50 | {"" , 0}, |
51 | }; |
52 | MODULE_DEVICE_TABLE(acpi, sbs_device_ids); |
53 | |
54 | struct acpi_battery { |
55 | struct power_supply *bat; |
56 | struct power_supply_desc bat_desc; |
57 | struct acpi_sbs *sbs; |
58 | unsigned long update_time; |
59 | char name[8]; |
60 | char manufacturer_name[ACPI_SBS_BLOCK_MAX]; |
61 | char device_name[ACPI_SBS_BLOCK_MAX]; |
62 | char device_chemistry[ACPI_SBS_BLOCK_MAX]; |
63 | u16 alarm_capacity; |
64 | u16 full_charge_capacity; |
65 | u16 design_capacity; |
66 | u16 design_voltage; |
67 | u16 serial_number; |
68 | u16 cycle_count; |
69 | u16 temp_now; |
70 | u16 voltage_now; |
71 | s16 rate_now; |
72 | s16 rate_avg; |
73 | u16 capacity_now; |
74 | u16 state_of_charge; |
75 | u16 state; |
76 | u16 mode; |
77 | u16 spec; |
78 | u8 id; |
79 | u8 present:1; |
80 | u8 have_sysfs_alarm:1; |
81 | }; |
82 | |
83 | #define to_acpi_battery(x) power_supply_get_drvdata(x) |
84 | |
85 | struct acpi_sbs { |
86 | struct power_supply *charger; |
87 | struct acpi_device *device; |
88 | struct acpi_smb_hc *hc; |
89 | struct mutex lock; |
90 | struct acpi_battery battery[MAX_SBS_BAT]; |
91 | u8 batteries_supported:4; |
92 | u8 manager_present:1; |
93 | u8 charger_present:1; |
94 | u8 charger_exists:1; |
95 | }; |
96 | |
97 | #define to_acpi_sbs(x) power_supply_get_drvdata(x) |
98 | |
99 | static void acpi_sbs_remove(struct acpi_device *device); |
100 | static int acpi_battery_get_state(struct acpi_battery *battery); |
101 | |
102 | static inline int battery_scale(int log) |
103 | { |
104 | int scale = 1; |
105 | while (log--) |
106 | scale *= 10; |
107 | return scale; |
108 | } |
109 | |
110 | static inline int acpi_battery_vscale(struct acpi_battery *battery) |
111 | { |
112 | return battery_scale(log: (battery->spec & 0x0f00) >> 8); |
113 | } |
114 | |
115 | static inline int acpi_battery_ipscale(struct acpi_battery *battery) |
116 | { |
117 | return battery_scale(log: (battery->spec & 0xf000) >> 12); |
118 | } |
119 | |
120 | static inline int acpi_battery_mode(struct acpi_battery *battery) |
121 | { |
122 | return (battery->mode & 0x8000); |
123 | } |
124 | |
125 | static inline int acpi_battery_scale(struct acpi_battery *battery) |
126 | { |
127 | return (acpi_battery_mode(battery) ? 10 : 1) * |
128 | acpi_battery_ipscale(battery); |
129 | } |
130 | |
131 | static int sbs_get_ac_property(struct power_supply *psy, |
132 | enum power_supply_property psp, |
133 | union power_supply_propval *val) |
134 | { |
135 | struct acpi_sbs *sbs = to_acpi_sbs(psy); |
136 | switch (psp) { |
137 | case POWER_SUPPLY_PROP_ONLINE: |
138 | val->intval = sbs->charger_present; |
139 | break; |
140 | default: |
141 | return -EINVAL; |
142 | } |
143 | return 0; |
144 | } |
145 | |
146 | static int acpi_battery_technology(struct acpi_battery *battery) |
147 | { |
148 | if (!strcasecmp(s1: "NiCd" , s2: battery->device_chemistry)) |
149 | return POWER_SUPPLY_TECHNOLOGY_NiCd; |
150 | if (!strcasecmp(s1: "NiMH" , s2: battery->device_chemistry)) |
151 | return POWER_SUPPLY_TECHNOLOGY_NiMH; |
152 | if (!strcasecmp(s1: "LION" , s2: battery->device_chemistry)) |
153 | return POWER_SUPPLY_TECHNOLOGY_LION; |
154 | if (!strcasecmp(s1: "LiP" , s2: battery->device_chemistry)) |
155 | return POWER_SUPPLY_TECHNOLOGY_LIPO; |
156 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; |
157 | } |
158 | |
159 | static int acpi_sbs_battery_get_property(struct power_supply *psy, |
160 | enum power_supply_property psp, |
161 | union power_supply_propval *val) |
162 | { |
163 | struct acpi_battery *battery = to_acpi_battery(psy); |
164 | |
165 | if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT) |
166 | return -ENODEV; |
167 | |
168 | acpi_battery_get_state(battery); |
169 | switch (psp) { |
170 | case POWER_SUPPLY_PROP_STATUS: |
171 | if (battery->rate_now < 0) |
172 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
173 | else if (battery->rate_now > 0) |
174 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
175 | else |
176 | val->intval = POWER_SUPPLY_STATUS_FULL; |
177 | break; |
178 | case POWER_SUPPLY_PROP_PRESENT: |
179 | val->intval = battery->present; |
180 | break; |
181 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
182 | val->intval = acpi_battery_technology(battery); |
183 | break; |
184 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
185 | val->intval = battery->cycle_count; |
186 | break; |
187 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
188 | val->intval = battery->design_voltage * |
189 | acpi_battery_vscale(battery) * 1000; |
190 | break; |
191 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
192 | val->intval = battery->voltage_now * |
193 | acpi_battery_vscale(battery) * 1000; |
194 | break; |
195 | case POWER_SUPPLY_PROP_CURRENT_NOW: |
196 | case POWER_SUPPLY_PROP_POWER_NOW: |
197 | val->intval = abs(battery->rate_now) * |
198 | acpi_battery_ipscale(battery) * 1000; |
199 | val->intval *= (acpi_battery_mode(battery)) ? |
200 | (battery->voltage_now * |
201 | acpi_battery_vscale(battery) / 1000) : 1; |
202 | break; |
203 | case POWER_SUPPLY_PROP_CURRENT_AVG: |
204 | case POWER_SUPPLY_PROP_POWER_AVG: |
205 | val->intval = abs(battery->rate_avg) * |
206 | acpi_battery_ipscale(battery) * 1000; |
207 | val->intval *= (acpi_battery_mode(battery)) ? |
208 | (battery->voltage_now * |
209 | acpi_battery_vscale(battery) / 1000) : 1; |
210 | break; |
211 | case POWER_SUPPLY_PROP_CAPACITY: |
212 | val->intval = battery->state_of_charge; |
213 | break; |
214 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
215 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
216 | val->intval = battery->design_capacity * |
217 | acpi_battery_scale(battery) * 1000; |
218 | break; |
219 | case POWER_SUPPLY_PROP_CHARGE_FULL: |
220 | case POWER_SUPPLY_PROP_ENERGY_FULL: |
221 | val->intval = battery->full_charge_capacity * |
222 | acpi_battery_scale(battery) * 1000; |
223 | break; |
224 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
225 | case POWER_SUPPLY_PROP_ENERGY_NOW: |
226 | val->intval = battery->capacity_now * |
227 | acpi_battery_scale(battery) * 1000; |
228 | break; |
229 | case POWER_SUPPLY_PROP_TEMP: |
230 | val->intval = battery->temp_now - 2730; // dK -> dC |
231 | break; |
232 | case POWER_SUPPLY_PROP_MODEL_NAME: |
233 | val->strval = battery->device_name; |
234 | break; |
235 | case POWER_SUPPLY_PROP_MANUFACTURER: |
236 | val->strval = battery->manufacturer_name; |
237 | break; |
238 | default: |
239 | return -EINVAL; |
240 | } |
241 | return 0; |
242 | } |
243 | |
244 | static enum power_supply_property sbs_ac_props[] = { |
245 | POWER_SUPPLY_PROP_ONLINE, |
246 | }; |
247 | |
248 | static enum power_supply_property sbs_charge_battery_props[] = { |
249 | POWER_SUPPLY_PROP_STATUS, |
250 | POWER_SUPPLY_PROP_PRESENT, |
251 | POWER_SUPPLY_PROP_TECHNOLOGY, |
252 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
253 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
254 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
255 | POWER_SUPPLY_PROP_CURRENT_NOW, |
256 | POWER_SUPPLY_PROP_CURRENT_AVG, |
257 | POWER_SUPPLY_PROP_CAPACITY, |
258 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
259 | POWER_SUPPLY_PROP_CHARGE_FULL, |
260 | POWER_SUPPLY_PROP_CHARGE_NOW, |
261 | POWER_SUPPLY_PROP_TEMP, |
262 | POWER_SUPPLY_PROP_MODEL_NAME, |
263 | POWER_SUPPLY_PROP_MANUFACTURER, |
264 | }; |
265 | |
266 | static enum power_supply_property sbs_energy_battery_props[] = { |
267 | POWER_SUPPLY_PROP_STATUS, |
268 | POWER_SUPPLY_PROP_PRESENT, |
269 | POWER_SUPPLY_PROP_TECHNOLOGY, |
270 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
271 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
272 | POWER_SUPPLY_PROP_CURRENT_NOW, |
273 | POWER_SUPPLY_PROP_CURRENT_AVG, |
274 | POWER_SUPPLY_PROP_POWER_NOW, |
275 | POWER_SUPPLY_PROP_POWER_AVG, |
276 | POWER_SUPPLY_PROP_CAPACITY, |
277 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
278 | POWER_SUPPLY_PROP_ENERGY_FULL, |
279 | POWER_SUPPLY_PROP_ENERGY_NOW, |
280 | POWER_SUPPLY_PROP_TEMP, |
281 | POWER_SUPPLY_PROP_MODEL_NAME, |
282 | POWER_SUPPLY_PROP_MANUFACTURER, |
283 | }; |
284 | |
285 | static const struct power_supply_desc acpi_sbs_charger_desc = { |
286 | .name = "sbs-charger" , |
287 | .type = POWER_SUPPLY_TYPE_MAINS, |
288 | .properties = sbs_ac_props, |
289 | .num_properties = ARRAY_SIZE(sbs_ac_props), |
290 | .get_property = sbs_get_ac_property, |
291 | }; |
292 | |
293 | /* -------------------------------------------------------------------------- |
294 | Smart Battery System Management |
295 | -------------------------------------------------------------------------- */ |
296 | |
297 | struct acpi_battery_reader { |
298 | u8 command; /* command for battery */ |
299 | u8 mode; /* word or block? */ |
300 | size_t offset; /* offset inside struct acpi_sbs_battery */ |
301 | }; |
302 | |
303 | static struct acpi_battery_reader info_readers[] = { |
304 | {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)}, |
305 | {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)}, |
306 | {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)}, |
307 | {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)}, |
308 | {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)}, |
309 | {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)}, |
310 | {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)}, |
311 | {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)}, |
312 | {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)}, |
313 | {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)}, |
314 | {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)}, |
315 | }; |
316 | |
317 | static struct acpi_battery_reader state_readers[] = { |
318 | {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)}, |
319 | {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)}, |
320 | {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)}, |
321 | {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)}, |
322 | {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)}, |
323 | {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)}, |
324 | {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)}, |
325 | }; |
326 | |
327 | static int acpi_manager_get_info(struct acpi_sbs *sbs) |
328 | { |
329 | int result = 0; |
330 | u16 battery_system_info; |
331 | |
332 | result = acpi_smbus_read(hc: sbs->hc, protocol: SMBUS_READ_WORD, address: ACPI_SBS_MANAGER, |
333 | command: 0x04, data: (u8 *)&battery_system_info); |
334 | if (!result) |
335 | sbs->batteries_supported = battery_system_info & 0x000f; |
336 | return result; |
337 | } |
338 | |
339 | static int acpi_battery_get_info(struct acpi_battery *battery) |
340 | { |
341 | int i, result = 0; |
342 | |
343 | for (i = 0; i < ARRAY_SIZE(info_readers); ++i) { |
344 | result = acpi_smbus_read(hc: battery->sbs->hc, |
345 | protocol: info_readers[i].mode, |
346 | address: ACPI_SBS_BATTERY, |
347 | command: info_readers[i].command, |
348 | data: (u8 *) battery + |
349 | info_readers[i].offset); |
350 | if (result) |
351 | break; |
352 | } |
353 | return result; |
354 | } |
355 | |
356 | static int acpi_battery_get_state(struct acpi_battery *battery) |
357 | { |
358 | int i, result = 0; |
359 | |
360 | if (battery->update_time && |
361 | time_before(jiffies, battery->update_time + |
362 | msecs_to_jiffies(cache_time))) |
363 | return 0; |
364 | for (i = 0; i < ARRAY_SIZE(state_readers); ++i) { |
365 | result = acpi_smbus_read(hc: battery->sbs->hc, |
366 | protocol: state_readers[i].mode, |
367 | address: ACPI_SBS_BATTERY, |
368 | command: state_readers[i].command, |
369 | data: (u8 *)battery + |
370 | state_readers[i].offset); |
371 | if (result) |
372 | goto end; |
373 | } |
374 | end: |
375 | battery->update_time = jiffies; |
376 | return result; |
377 | } |
378 | |
379 | static int acpi_battery_get_alarm(struct acpi_battery *battery) |
380 | { |
381 | return acpi_smbus_read(hc: battery->sbs->hc, protocol: SMBUS_READ_WORD, |
382 | address: ACPI_SBS_BATTERY, command: 0x01, |
383 | data: (u8 *)&battery->alarm_capacity); |
384 | } |
385 | |
386 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
387 | { |
388 | struct acpi_sbs *sbs = battery->sbs; |
389 | u16 value, sel = 1 << (battery->id + 12); |
390 | |
391 | int ret; |
392 | |
393 | |
394 | if (sbs->manager_present) { |
395 | ret = acpi_smbus_read(hc: sbs->hc, protocol: SMBUS_READ_WORD, address: ACPI_SBS_MANAGER, |
396 | command: 0x01, data: (u8 *)&value); |
397 | if (ret) |
398 | goto end; |
399 | if ((value & 0xf000) != sel) { |
400 | value &= 0x0fff; |
401 | value |= sel; |
402 | ret = acpi_smbus_write(hc: sbs->hc, protocol: SMBUS_WRITE_WORD, |
403 | slave_address: ACPI_SBS_MANAGER, |
404 | command: 0x01, data: (u8 *)&value, length: 2); |
405 | if (ret) |
406 | goto end; |
407 | } |
408 | } |
409 | ret = acpi_smbus_write(hc: sbs->hc, protocol: SMBUS_WRITE_WORD, slave_address: ACPI_SBS_BATTERY, |
410 | command: 0x01, data: (u8 *)&battery->alarm_capacity, length: 2); |
411 | end: |
412 | return ret; |
413 | } |
414 | |
415 | static int acpi_ac_get_present(struct acpi_sbs *sbs) |
416 | { |
417 | int result; |
418 | u16 status; |
419 | |
420 | result = acpi_smbus_read(hc: sbs->hc, protocol: SMBUS_READ_WORD, address: ACPI_SBS_CHARGER, |
421 | command: 0x13, data: (u8 *) & status); |
422 | |
423 | if (result) |
424 | return result; |
425 | |
426 | /* |
427 | * The spec requires that bit 4 always be 1. If it's not set, assume |
428 | * that the implementation doesn't support an SBS charger. |
429 | * |
430 | * And on some MacBooks a status of 0xffff is always returned, no |
431 | * matter whether the charger is plugged in or not, which is also |
432 | * wrong, so ignore the SBS charger for those too. |
433 | */ |
434 | if (!((status >> 4) & 0x1) || status == 0xffff) |
435 | return -ENODEV; |
436 | |
437 | sbs->charger_present = (status >> 15) & 0x1; |
438 | return 0; |
439 | } |
440 | |
441 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
442 | struct device_attribute *attr, |
443 | char *buf) |
444 | { |
445 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
446 | acpi_battery_get_alarm(battery); |
447 | return sprintf(buf, fmt: "%d\n" , battery->alarm_capacity * |
448 | acpi_battery_scale(battery) * 1000); |
449 | } |
450 | |
451 | static ssize_t acpi_battery_alarm_store(struct device *dev, |
452 | struct device_attribute *attr, |
453 | const char *buf, size_t count) |
454 | { |
455 | unsigned long x; |
456 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
457 | if (sscanf(buf, "%lu\n" , &x) == 1) |
458 | battery->alarm_capacity = x / |
459 | (1000 * acpi_battery_scale(battery)); |
460 | if (battery->present) |
461 | acpi_battery_set_alarm(battery); |
462 | return count; |
463 | } |
464 | |
465 | static const struct device_attribute alarm_attr = { |
466 | .attr = {.name = "alarm" , .mode = 0644}, |
467 | .show = acpi_battery_alarm_show, |
468 | .store = acpi_battery_alarm_store, |
469 | }; |
470 | |
471 | /* -------------------------------------------------------------------------- |
472 | Driver Interface |
473 | -------------------------------------------------------------------------- */ |
474 | static int acpi_battery_read(struct acpi_battery *battery) |
475 | { |
476 | int result, saved_present = battery->present; |
477 | u16 state; |
478 | |
479 | if (battery->sbs->manager_present) { |
480 | result = acpi_smbus_read(hc: battery->sbs->hc, protocol: SMBUS_READ_WORD, |
481 | address: ACPI_SBS_MANAGER, command: 0x01, data: (u8 *)&state); |
482 | if (result) |
483 | return result; |
484 | |
485 | battery->present = state & (1 << battery->id); |
486 | if (!battery->present) |
487 | return 0; |
488 | |
489 | /* Masking necessary for Smart Battery Selectors */ |
490 | state = 0x0fff; |
491 | state |= 1 << (battery->id + 12); |
492 | acpi_smbus_write(hc: battery->sbs->hc, protocol: SMBUS_WRITE_WORD, |
493 | slave_address: ACPI_SBS_MANAGER, command: 0x01, data: (u8 *)&state, length: 2); |
494 | } else { |
495 | if (battery->id == 0) { |
496 | battery->present = 1; |
497 | } else { |
498 | if (!battery->present) |
499 | return 0; |
500 | } |
501 | } |
502 | |
503 | if (saved_present != battery->present) { |
504 | battery->update_time = 0; |
505 | result = acpi_battery_get_info(battery); |
506 | if (result) { |
507 | battery->present = 0; |
508 | return result; |
509 | } |
510 | } |
511 | result = acpi_battery_get_state(battery); |
512 | if (result) |
513 | battery->present = 0; |
514 | return result; |
515 | } |
516 | |
517 | /* Smart Battery */ |
518 | static int acpi_battery_add(struct acpi_sbs *sbs, int id) |
519 | { |
520 | struct acpi_battery *battery = &sbs->battery[id]; |
521 | struct power_supply_config psy_cfg = { .drv_data = battery, }; |
522 | int result; |
523 | |
524 | battery->id = id; |
525 | battery->sbs = sbs; |
526 | result = acpi_battery_read(battery); |
527 | if (result) |
528 | return result; |
529 | |
530 | sprintf(buf: battery->name, ACPI_BATTERY_DIR_NAME, id); |
531 | battery->bat_desc.name = battery->name; |
532 | battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY; |
533 | if (!acpi_battery_mode(battery)) { |
534 | battery->bat_desc.properties = sbs_charge_battery_props; |
535 | battery->bat_desc.num_properties = |
536 | ARRAY_SIZE(sbs_charge_battery_props); |
537 | } else { |
538 | battery->bat_desc.properties = sbs_energy_battery_props; |
539 | battery->bat_desc.num_properties = |
540 | ARRAY_SIZE(sbs_energy_battery_props); |
541 | } |
542 | battery->bat_desc.get_property = acpi_sbs_battery_get_property; |
543 | battery->bat = power_supply_register(parent: &sbs->device->dev, |
544 | desc: &battery->bat_desc, cfg: &psy_cfg); |
545 | if (IS_ERR(ptr: battery->bat)) { |
546 | result = PTR_ERR(ptr: battery->bat); |
547 | battery->bat = NULL; |
548 | goto end; |
549 | } |
550 | |
551 | result = device_create_file(device: &battery->bat->dev, entry: &alarm_attr); |
552 | if (result) |
553 | goto end; |
554 | battery->have_sysfs_alarm = 1; |
555 | end: |
556 | pr_info("%s [%s]: Battery Slot [%s] (battery %s)\n" , |
557 | ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), |
558 | battery->name, battery->present ? "present" : "absent" ); |
559 | return result; |
560 | } |
561 | |
562 | static void acpi_battery_remove(struct acpi_sbs *sbs, int id) |
563 | { |
564 | struct acpi_battery *battery = &sbs->battery[id]; |
565 | |
566 | if (battery->bat) { |
567 | if (battery->have_sysfs_alarm) |
568 | device_remove_file(dev: &battery->bat->dev, attr: &alarm_attr); |
569 | power_supply_unregister(psy: battery->bat); |
570 | } |
571 | } |
572 | |
573 | static int acpi_charger_add(struct acpi_sbs *sbs) |
574 | { |
575 | int result; |
576 | struct power_supply_config psy_cfg = { .drv_data = sbs, }; |
577 | |
578 | result = acpi_ac_get_present(sbs); |
579 | if (result) |
580 | goto end; |
581 | |
582 | sbs->charger_exists = 1; |
583 | sbs->charger = power_supply_register(parent: &sbs->device->dev, |
584 | desc: &acpi_sbs_charger_desc, cfg: &psy_cfg); |
585 | if (IS_ERR(ptr: sbs->charger)) { |
586 | result = PTR_ERR(ptr: sbs->charger); |
587 | sbs->charger = NULL; |
588 | } |
589 | pr_info("%s [%s]: AC Adapter [%s] (%s)\n" , |
590 | ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), |
591 | ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line" ); |
592 | end: |
593 | return result; |
594 | } |
595 | |
596 | static void acpi_charger_remove(struct acpi_sbs *sbs) |
597 | { |
598 | if (sbs->charger) |
599 | power_supply_unregister(psy: sbs->charger); |
600 | } |
601 | |
602 | static void acpi_sbs_callback(void *context) |
603 | { |
604 | int id; |
605 | struct acpi_sbs *sbs = context; |
606 | struct acpi_battery *bat; |
607 | u8 saved_charger_state = sbs->charger_present; |
608 | u8 saved_battery_state; |
609 | |
610 | if (sbs->charger_exists) { |
611 | acpi_ac_get_present(sbs); |
612 | if (sbs->charger_present != saved_charger_state) |
613 | kobject_uevent(kobj: &sbs->charger->dev.kobj, action: KOBJ_CHANGE); |
614 | } |
615 | |
616 | if (sbs->manager_present) { |
617 | for (id = 0; id < MAX_SBS_BAT; ++id) { |
618 | if (!(sbs->batteries_supported & (1 << id))) |
619 | continue; |
620 | bat = &sbs->battery[id]; |
621 | saved_battery_state = bat->present; |
622 | acpi_battery_read(battery: bat); |
623 | if (saved_battery_state == bat->present) |
624 | continue; |
625 | kobject_uevent(kobj: &bat->bat->dev.kobj, action: KOBJ_CHANGE); |
626 | } |
627 | } |
628 | } |
629 | |
630 | static int acpi_sbs_add(struct acpi_device *device) |
631 | { |
632 | struct acpi_sbs *sbs; |
633 | int result = 0; |
634 | int id; |
635 | |
636 | sbs = kzalloc(size: sizeof(struct acpi_sbs), GFP_KERNEL); |
637 | if (!sbs) { |
638 | result = -ENOMEM; |
639 | goto end; |
640 | } |
641 | |
642 | mutex_init(&sbs->lock); |
643 | |
644 | sbs->hc = acpi_driver_data(d: acpi_dev_parent(adev: device)); |
645 | sbs->device = device; |
646 | strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); |
647 | strcpy(acpi_device_class(device), ACPI_SBS_CLASS); |
648 | device->driver_data = sbs; |
649 | |
650 | result = acpi_charger_add(sbs); |
651 | if (result && result != -ENODEV) |
652 | goto end; |
653 | |
654 | result = 0; |
655 | |
656 | if (!x86_apple_machine) { |
657 | result = acpi_manager_get_info(sbs); |
658 | if (!result) { |
659 | sbs->manager_present = 1; |
660 | for (id = 0; id < MAX_SBS_BAT; ++id) |
661 | if ((sbs->batteries_supported & (1 << id))) |
662 | acpi_battery_add(sbs, id); |
663 | } |
664 | } |
665 | |
666 | if (!sbs->manager_present) |
667 | acpi_battery_add(sbs, id: 0); |
668 | |
669 | acpi_smbus_register_callback(hc: sbs->hc, callback: acpi_sbs_callback, context: sbs); |
670 | end: |
671 | if (result) |
672 | acpi_sbs_remove(device); |
673 | return result; |
674 | } |
675 | |
676 | static void acpi_sbs_remove(struct acpi_device *device) |
677 | { |
678 | struct acpi_sbs *sbs; |
679 | int id; |
680 | |
681 | if (!device) |
682 | return; |
683 | sbs = acpi_driver_data(d: device); |
684 | if (!sbs) |
685 | return; |
686 | mutex_lock(&sbs->lock); |
687 | acpi_smbus_unregister_callback(hc: sbs->hc); |
688 | for (id = 0; id < MAX_SBS_BAT; ++id) |
689 | acpi_battery_remove(sbs, id); |
690 | acpi_charger_remove(sbs); |
691 | mutex_unlock(lock: &sbs->lock); |
692 | mutex_destroy(lock: &sbs->lock); |
693 | kfree(objp: sbs); |
694 | } |
695 | |
696 | #ifdef CONFIG_PM_SLEEP |
697 | static int acpi_sbs_resume(struct device *dev) |
698 | { |
699 | struct acpi_sbs *sbs; |
700 | if (!dev) |
701 | return -EINVAL; |
702 | sbs = to_acpi_device(dev)->driver_data; |
703 | acpi_sbs_callback(context: sbs); |
704 | return 0; |
705 | } |
706 | #else |
707 | #define acpi_sbs_resume NULL |
708 | #endif |
709 | |
710 | static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume); |
711 | |
712 | static struct acpi_driver acpi_sbs_driver = { |
713 | .name = "sbs" , |
714 | .class = ACPI_SBS_CLASS, |
715 | .ids = sbs_device_ids, |
716 | .ops = { |
717 | .add = acpi_sbs_add, |
718 | .remove = acpi_sbs_remove, |
719 | }, |
720 | .drv.pm = &acpi_sbs_pm, |
721 | }; |
722 | module_acpi_driver(acpi_sbs_driver); |
723 | |