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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6-block.git] / drivers / acpi / sbs.c
CommitLineData
3f86b832 1/*
db1c291a 2 * sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $)
3f86b832 3 *
db1c291a
AS		 4 * Copyright (c) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
5 * Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
3f86b832
RT		 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/module.h>
29#include <linux/moduleparam.h>
30#include <linux/kernel.h>
94f6c086 31
fdcedbba 32#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832
RT		 33#include <linux/proc_fs.h>
34#include <linux/seq_file.h>
35#include <asm/uaccess.h>
66e4b72b 36#endif
94f6c086 37
3f86b832 38#include <linux/acpi.h>
6d15702c 39#include <linux/timer.h>
72206233 40#include <linux/jiffies.h>
3f86b832
RT		 41#include <linux/delay.h>
42
94f6c086
AS		 43#include <linux/power_supply.h>
44
91087dfa
AS		 45#include "sbshc.h"
46
3f86b832
RT		 47#define ACPI_SBS_CLASS "sbs"
48#define ACPI_AC_CLASS "ac_adapter"
49#define ACPI_BATTERY_CLASS "battery"
3f86b832
RT		 50#define ACPI_SBS_DEVICE_NAME "Smart Battery System"
51#define ACPI_SBS_FILE_INFO "info"
52#define ACPI_SBS_FILE_STATE "state"
53#define ACPI_SBS_FILE_ALARM "alarm"
54#define ACPI_BATTERY_DIR_NAME "BAT%i"
55#define ACPI_AC_DIR_NAME "AC0"
3f86b832 56
db1c291a
AS		 57#define ACPI_SBS_NOTIFY_STATUS 0x80
58#define ACPI_SBS_NOTIFY_INFO 0x81
3f86b832 59
db1c291a 60MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
3f86b832
RT		 61MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
62MODULE_LICENSE("GPL");
63
db1c291a
AS		 64static unsigned int cache_time = 1000;
65module_param(cache_time, uint, 0644);
66MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
6d15702c
VL		 67
68extern struct proc_dir_entry *acpi_lock_ac_dir(void);
69extern struct proc_dir_entry *acpi_lock_battery_dir(void);
70extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
71extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
72
db1c291a 73#define MAX_SBS_BAT 4
6d15702c
VL		 74#define ACPI_SBS_BLOCK_MAX 32
75
1ba90e3a 76static const struct acpi_device_id sbs_device_ids[] = {
91087dfa 77 {"ACPI0002", 0},
1ba90e3a
TR		 78 {"", 0},
79};
80MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
81
3f86b832 82struct acpi_battery {
94f6c086 83 struct power_supply bat;
3f86b832 84 struct acpi_sbs *sbs;
fdcedbba 85#ifdef CONFIG_ACPI_PROCFS_POWER
89862e3b 86 struct proc_dir_entry *proc_entry;
66e4b72b 87#endif
db1c291a
AS		 88 unsigned long update_time;
89 char name[8];
89862e3b
AS		 90 char manufacturer_name[ACPI_SBS_BLOCK_MAX];
91 char device_name[ACPI_SBS_BLOCK_MAX];
92 char device_chemistry[ACPI_SBS_BLOCK_MAX];
94f6c086 93 u16 alarm_capacity;
89862e3b
AS		 94 u16 full_charge_capacity;
95 u16 design_capacity;
96 u16 design_voltage;
97 u16 serial_number;
db1c291a
AS		 98 u16 cycle_count;
99 u16 temp_now;
89862e3b
AS		 100 u16 voltage_now;
101 s16 current_now;
db1c291a 102 s16 current_avg;
89862e3b 103 u16 capacity_now;
db1c291a 104 u16 state_of_charge;
89862e3b 105 u16 state;
89862e3b 106 u16 mode;
db1c291a 107 u16 spec;
89862e3b 108 u8 id;
89862e3b 109 u8 present:1;
037cbc63 110 u8 have_sysfs_alarm:1;
3f86b832
RT		 111};
112
94f6c086
AS		 113#define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
114
3f86b832 115struct acpi_sbs {
94f6c086 116 struct power_supply charger;
3f86b832 117 struct acpi_device *device;
91087dfa 118 struct acpi_smb_hc *hc;
db1c291a 119 struct mutex lock;
fdcedbba 120#ifdef CONFIG_ACPI_PROCFS_POWER
db1c291a 121 struct proc_dir_entry *charger_entry;
66e4b72b 122#endif
3f86b832 123 struct acpi_battery battery[MAX_SBS_BAT];
db1c291a 124 u8 batteries_supported:4;
89862e3b
AS		 125 u8 manager_present:1;
126 u8 charger_present:1;
3f86b832
RT		 127};
128
94f6c086
AS		 129#define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
130
db1c291a 131static inline int battery_scale(int log)
72206233 132{
db1c291a
AS		 133 int scale = 1;
134 while (log--)
135 scale *= 10;
136 return scale;
72206233
VL		 137}
138
db1c291a 139static inline int acpi_battery_vscale(struct acpi_battery *battery)
72206233 140{
db1c291a 141 return battery_scale((battery->spec & 0x0f00) >> 8);
72206233
VL		 142}
143
db1c291a 144static inline int acpi_battery_ipscale(struct acpi_battery *battery)
72206233 145{
db1c291a 146 return battery_scale((battery->spec & 0xf000) >> 12);
72206233
VL		 147}
148
db1c291a 149static inline int acpi_battery_mode(struct acpi_battery *battery)
72206233 150{
db1c291a 151 return (battery->mode & 0x8000);
72206233 152}
3f86b832 153
db1c291a 154static inline int acpi_battery_scale(struct acpi_battery *battery)
3f86b832 155{
db1c291a
AS		 156 return (acpi_battery_mode(battery) ? 10 : 1) *
157 acpi_battery_ipscale(battery);
3f86b832
RT		 158}
159
94f6c086
AS		 160static int sbs_get_ac_property(struct power_supply *psy,
161 enum power_supply_property psp,
162 union power_supply_propval *val)
163{
164 struct acpi_sbs *sbs = to_acpi_sbs(psy);
165 switch (psp) {
166 case POWER_SUPPLY_PROP_ONLINE:
167 val->intval = sbs->charger_present;
168 break;
169 default:
170 return -EINVAL;
171 }
172 return 0;
173}
174
175static int acpi_battery_technology(struct acpi_battery *battery)
176{
177 if (!strcasecmp("NiCd", battery->device_chemistry))
178 return POWER_SUPPLY_TECHNOLOGY_NiCd;
179 if (!strcasecmp("NiMH", battery->device_chemistry))
180 return POWER_SUPPLY_TECHNOLOGY_NiMH;
181 if (!strcasecmp("LION", battery->device_chemistry))
182 return POWER_SUPPLY_TECHNOLOGY_LION;
183 if (!strcasecmp("LiP", battery->device_chemistry))
184 return POWER_SUPPLY_TECHNOLOGY_LIPO;
185 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
186}
187
188static int acpi_sbs_battery_get_property(struct power_supply *psy,
189 enum power_supply_property psp,
190 union power_supply_propval *val)
191{
192 struct acpi_battery *battery = to_acpi_battery(psy);
193
194 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
195 return -ENODEV;
196 switch (psp) {
197 case POWER_SUPPLY_PROP_STATUS:
198 if (battery->current_now < 0)
199 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
200 else if (battery->current_now > 0)
201 val->intval = POWER_SUPPLY_STATUS_CHARGING;
202 else
203 val->intval = POWER_SUPPLY_STATUS_FULL;
204 break;
205 case POWER_SUPPLY_PROP_PRESENT:
206 val->intval = battery->present;
207 break;
208 case POWER_SUPPLY_PROP_TECHNOLOGY:
209 val->intval = acpi_battery_technology(battery);
210 break;
211 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
212 val->intval = battery->design_voltage *
213 acpi_battery_vscale(battery) * 1000;
214 break;
215 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
216 val->intval = battery->voltage_now *
217 acpi_battery_vscale(battery) * 1000;
218 break;
219 case POWER_SUPPLY_PROP_CURRENT_NOW:
220 val->intval = abs(battery->current_now) *
221 acpi_battery_ipscale(battery) * 1000;
222 break;
223 case POWER_SUPPLY_PROP_CURRENT_AVG:
224 val->intval = abs(battery->current_avg) *
225 acpi_battery_ipscale(battery) * 1000;
226 break;
227 case POWER_SUPPLY_PROP_CAPACITY:
228 val->intval = battery->state_of_charge;
229 break;
230 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
231 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
232 val->intval = battery->design_capacity *
233 acpi_battery_scale(battery) * 1000;
234 break;
235 case POWER_SUPPLY_PROP_CHARGE_FULL:
236 case POWER_SUPPLY_PROP_ENERGY_FULL:
237 val->intval = battery->full_charge_capacity *
238 acpi_battery_scale(battery) * 1000;
239 break;
240 case POWER_SUPPLY_PROP_CHARGE_NOW:
241 case POWER_SUPPLY_PROP_ENERGY_NOW:
242 val->intval = battery->capacity_now *
243 acpi_battery_scale(battery) * 1000;
244 break;
245 case POWER_SUPPLY_PROP_TEMP:
246 val->intval = battery->temp_now - 2730; // dK -> dC
247 break;
248 case POWER_SUPPLY_PROP_MODEL_NAME:
249 val->strval = battery->device_name;
250 break;
251 case POWER_SUPPLY_PROP_MANUFACTURER:
252 val->strval = battery->manufacturer_name;
253 break;
254 default:
255 return -EINVAL;
256 }
257 return 0;
258}
259
260static enum power_supply_property sbs_ac_props[] = {
261 POWER_SUPPLY_PROP_ONLINE,
262};
263
264static enum power_supply_property sbs_charge_battery_props[] = {
265 POWER_SUPPLY_PROP_STATUS,
266 POWER_SUPPLY_PROP_PRESENT,
267 POWER_SUPPLY_PROP_TECHNOLOGY,
268 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
269 POWER_SUPPLY_PROP_VOLTAGE_NOW,
270 POWER_SUPPLY_PROP_CURRENT_NOW,
271 POWER_SUPPLY_PROP_CURRENT_AVG,
272 POWER_SUPPLY_PROP_CAPACITY,
273 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
274 POWER_SUPPLY_PROP_CHARGE_FULL,
275 POWER_SUPPLY_PROP_CHARGE_NOW,
276 POWER_SUPPLY_PROP_TEMP,
277 POWER_SUPPLY_PROP_MODEL_NAME,
278 POWER_SUPPLY_PROP_MANUFACTURER,
279};
280
281static enum power_supply_property sbs_energy_battery_props[] = {
282 POWER_SUPPLY_PROP_STATUS,
283 POWER_SUPPLY_PROP_PRESENT,
284 POWER_SUPPLY_PROP_TECHNOLOGY,
285 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
286 POWER_SUPPLY_PROP_VOLTAGE_NOW,
287 POWER_SUPPLY_PROP_CURRENT_NOW,
288 POWER_SUPPLY_PROP_CURRENT_AVG,
289 POWER_SUPPLY_PROP_CAPACITY,
290 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
291 POWER_SUPPLY_PROP_ENERGY_FULL,
292 POWER_SUPPLY_PROP_ENERGY_NOW,
293 POWER_SUPPLY_PROP_TEMP,
294 POWER_SUPPLY_PROP_MODEL_NAME,
295 POWER_SUPPLY_PROP_MANUFACTURER,
296};
297
db1c291a
AS		 298/* --------------------------------------------------------------------------
299 Smart Battery System Management
300 -------------------------------------------------------------------------- */
3f86b832 301
db1c291a
AS		 302struct acpi_battery_reader {
303 u8 command; /* command for battery */
304 u8 mode; /* word or block? */
305 size_t offset; /* offset inside struct acpi_sbs_battery */
306};
3f86b832 307
db1c291a
AS		 308static struct acpi_battery_reader info_readers[] = {
309 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
310 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
311 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
312 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
313 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
314 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
315 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
316 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
317 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
318 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
319 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
320};
3f86b832 321
db1c291a
AS		 322static struct acpi_battery_reader state_readers[] = {
323 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
324 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
325 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_now)},
326 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_avg)},
327 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
328 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
329 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
330};
3f86b832 331
db1c291a 332static int acpi_manager_get_info(struct acpi_sbs *sbs)
3f86b832 333{
3f86b832 334 int result = 0;
db1c291a 335 u16 battery_system_info;
3f86b832 336
db1c291a 337 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
94f6c086 338 0x04, (u8 *)&battery_system_info);
db1c291a
AS		 339 if (!result)
340 sbs->batteries_supported = battery_system_info & 0x000f;
635227ee 341 return result;
3f86b832
RT		 342}
343
344static int acpi_battery_get_info(struct acpi_battery *battery)
345{
db1c291a 346 int i, result = 0;
3f86b832 347
db1c291a 348 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
94f6c086
AS		 349 result = acpi_smbus_read(battery->sbs->hc,
350 info_readers[i].mode,
351 ACPI_SBS_BATTERY,
352 info_readers[i].command,
353 (u8 *) battery +
354 info_readers[i].offset);
db1c291a
AS		 355 if (result)
356 break;
3f86b832 357 }
635227ee 358 return result;
3f86b832
RT		 359}
360
3f86b832
RT		 361static int acpi_battery_get_state(struct acpi_battery *battery)
362{
db1c291a 363 int i, result = 0;
3f86b832 364
94f6c086
AS		 365 if (battery->update_time &&
366 time_before(jiffies, battery->update_time +
db1c291a
AS		 367 msecs_to_jiffies(cache_time)))
368 return 0;
369 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
370 result = acpi_smbus_read(battery->sbs->hc,
371 state_readers[i].mode,
372 ACPI_SBS_BATTERY,
373 state_readers[i].command,
374 (u8 *)battery +
375 state_readers[i].offset);
376 if (result)
3f86b832 377 goto end;
3f86b832 378 }
3f86b832 379 end:
db1c291a 380 battery->update_time = jiffies;
635227ee 381 return result;
3f86b832
RT		 382}
383
db1c291a 384static int acpi_battery_get_alarm(struct acpi_battery *battery)
3f86b832 385{
db1c291a
AS		 386 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
387 ACPI_SBS_BATTERY, 0x01,
94f6c086 388 (u8 *)&battery->alarm_capacity);
3f86b832
RT		 389}
390
db1c291a 391static int acpi_battery_set_alarm(struct acpi_battery *battery)
3f86b832 392{
db1c291a 393 struct acpi_sbs *sbs = battery->sbs;
94f6c086
AS		 394 u16 value, sel = 1 << (battery->id + 12);
395
396 int ret;
397
3f86b832 398
db1c291a 399 if (sbs->manager_present) {
94f6c086 400 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
db1c291a 401 0x01, (u8 *)&value);
94f6c086
AS		 402 if (ret)
403 goto end;
404 if ((value & 0xf000) != sel) {
405 value &= 0x0fff;
406 value |= sel;
407 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
408 ACPI_SBS_MANAGER,
409 0x01, (u8 *)&value, 2);
410 if (ret)
411 goto end;
412 }
3f86b832 413 }
94f6c086
AS		 414 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
415 0x01, (u8 *)&battery->alarm_capacity, 2);
416 end:
417 return ret;
3f86b832
RT		 418}
419
420static int acpi_ac_get_present(struct acpi_sbs *sbs)
421{
db1c291a
AS		 422 int result;
423 u16 status;
3f86b832 424
db1c291a
AS		 425 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
426 0x13, (u8 *) & status);
427 if (!result)
428 sbs->charger_present = (status >> 15) & 0x1;
635227ee 429 return result;
3f86b832
RT		 430}
431
8bd95532
AS		 432static ssize_t acpi_battery_alarm_show(struct device *dev,
433 struct device_attribute *attr,
434 char *buf)
435{
436 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
437 acpi_battery_get_alarm(battery);
438 return sprintf(buf, "%d\n", battery->alarm_capacity *
439 acpi_battery_scale(battery) * 1000);
440}
441
442static ssize_t acpi_battery_alarm_store(struct device *dev,
443 struct device_attribute *attr,
444 const char *buf, size_t count)
445{
446 unsigned long x;
447 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
448 if (sscanf(buf, "%ld\n", &x) == 1)
449 battery->alarm_capacity = x /
450 (1000 * acpi_battery_scale(battery));
451 if (battery->present)
452 acpi_battery_set_alarm(battery);
453 return count;
454}
455
456static struct device_attribute alarm_attr = {
457 .attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE},
458 .show = acpi_battery_alarm_show,
459 .store = acpi_battery_alarm_store,
460};
461
3f86b832
RT		 462/* --------------------------------------------------------------------------
463 FS Interface (/proc/acpi)
464 -------------------------------------------------------------------------- */
465
fdcedbba 466#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 467/* Generic Routines */
3f86b832 468static int
db1c291a 469acpi_sbs_add_fs(struct proc_dir_entry **dir,
94f6c086
AS		 470 struct proc_dir_entry *parent_dir,
471 char *dir_name,
472 struct file_operations *info_fops,
473 struct file_operations *state_fops,
474 struct file_operations *alarm_fops, void *data)
3f86b832
RT		 475{
476 struct proc_dir_entry *entry = NULL;
477
3f86b832
RT		 478 if (!*dir) {
479 *dir = proc_mkdir(dir_name, parent_dir);
480 if (!*dir) {
635227ee 481 return -ENODEV;
3f86b832
RT		 482 }
483 (*dir)->owner = THIS_MODULE;
484 }
485
486 /* 'info' [R] */
487 if (info_fops) {
488 entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir);
94f6c086 489 if (entry) {
3f86b832
RT		 490 entry->proc_fops = info_fops;
491 entry->data = data;
492 entry->owner = THIS_MODULE;
493 }
494 }
495
496 /* 'state' [R] */
497 if (state_fops) {
498 entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir);
94f6c086 499 if (entry) {
3f86b832
RT		 500 entry->proc_fops = state_fops;
501 entry->data = data;
502 entry->owner = THIS_MODULE;
503 }
504 }
505
506 /* 'alarm' [R/W] */
507 if (alarm_fops) {
508 entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir);
94f6c086 509 if (entry) {
3f86b832
RT		 510 entry->proc_fops = alarm_fops;
511 entry->data = data;
512 entry->owner = THIS_MODULE;
513 }
514 }
635227ee 515 return 0;
3f86b832
RT		 516}
517
518static void
db1c291a 519acpi_sbs_remove_fs(struct proc_dir_entry **dir,
3f86b832
RT		 520 struct proc_dir_entry *parent_dir)
521{
3f86b832
RT		 522 if (*dir) {
523 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
524 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
525 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
526 remove_proc_entry((*dir)->name, parent_dir);
527 *dir = NULL;
528 }
3f86b832
RT		 529}
530
531/* Smart Battery Interface */
3f86b832
RT		 532static struct proc_dir_entry *acpi_battery_dir = NULL;
533
db1c291a
AS		 534static inline char *acpi_battery_units(struct acpi_battery *battery)
535{
5a21e4fe 536 return acpi_battery_mode(battery) ? " mW" : " mA";
db1c291a
AS		 537}
538
539
3f86b832
RT		 540static int acpi_battery_read_info(struct seq_file *seq, void *offset)
541{
50dd0969 542 struct acpi_battery *battery = seq->private;
72206233 543 struct acpi_sbs *sbs = battery->sbs;
3f86b832
RT		 544 int result = 0;
545
db1c291a 546 mutex_lock(&sbs->lock);
3f86b832 547
db1c291a
AS		 548 seq_printf(seq, "present: %s\n",
549 (battery->present) ? "yes" : "no");
550 if (!battery->present)
72206233 551 goto end;
3f86b832 552
5a21e4fe 553 seq_printf(seq, "design capacity: %i%sh\n",
db1c291a
AS		 554 battery->design_capacity * acpi_battery_scale(battery),
555 acpi_battery_units(battery));
5a21e4fe 556 seq_printf(seq, "last full capacity: %i%sh\n",
db1c291a
AS		 557 battery->full_charge_capacity * acpi_battery_scale(battery),
558 acpi_battery_units(battery));
3f86b832 559 seq_printf(seq, "battery technology: rechargeable\n");
3f86b832 560 seq_printf(seq, "design voltage: %i mV\n",
db1c291a 561 battery->design_voltage * acpi_battery_vscale(battery));
3f86b832
RT		 562 seq_printf(seq, "design capacity warning: unknown\n");
563 seq_printf(seq, "design capacity low: unknown\n");
564 seq_printf(seq, "capacity granularity 1: unknown\n");
565 seq_printf(seq, "capacity granularity 2: unknown\n");
db1c291a 566 seq_printf(seq, "model number: %s\n", battery->device_name);
3f86b832 567 seq_printf(seq, "serial number: %i\n",
89862e3b 568 battery->serial_number);
3f86b832 569 seq_printf(seq, "battery type: %s\n",
89862e3b 570 battery->device_chemistry);
3f86b832 571 seq_printf(seq, "OEM info: %s\n",
89862e3b 572 battery->manufacturer_name);
3f86b832 573 end:
db1c291a 574 mutex_unlock(&sbs->lock);
635227ee 575 return result;
3f86b832
RT		 576}
577
578static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
579{
580 return single_open(file, acpi_battery_read_info, PDE(inode)->data);
581}
582
583static int acpi_battery_read_state(struct seq_file *seq, void *offset)
584{
72206233
VL		 585 struct acpi_battery *battery = seq->private;
586 struct acpi_sbs *sbs = battery->sbs;
5a21e4fe 587 int rate;
3f86b832 588
db1c291a
AS		 589 mutex_lock(&sbs->lock);
590 seq_printf(seq, "present: %s\n",
591 (battery->present) ? "yes" : "no");
592 if (!battery->present)
3f86b832 593 goto end;
3f86b832 594
db1c291a
AS		 595 acpi_battery_get_state(battery);
596 seq_printf(seq, "capacity state: %s\n",
597 (battery->state & 0x0010) ? "critical" : "ok");
598 seq_printf(seq, "charging state: %s\n",
599 (battery->current_now < 0) ? "discharging" :
600 ((battery->current_now > 0) ? "charging" : "charged"));
5a21e4fe
AS		 601 rate = abs(battery->current_now) * acpi_battery_ipscale(battery);
602 rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
603 acpi_battery_vscale(battery)/1000):1;
604 seq_printf(seq, "present rate: %d%s\n", rate,
605 acpi_battery_units(battery));
606 seq_printf(seq, "remaining capacity: %i%sh\n",
db1c291a
AS		 607 battery->capacity_now * acpi_battery_scale(battery),
608 acpi_battery_units(battery));
3f86b832 609 seq_printf(seq, "present voltage: %i mV\n",
db1c291a 610 battery->voltage_now * acpi_battery_vscale(battery));
3f86b832
RT		 611
612 end:
db1c291a 613 mutex_unlock(&sbs->lock);
5a21e4fe 614 return 0;
3f86b832
RT		 615}
616
617static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
618{
619 return single_open(file, acpi_battery_read_state, PDE(inode)->data);
620}
621
622static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
623{
50dd0969 624 struct acpi_battery *battery = seq->private;
72206233 625 struct acpi_sbs *sbs = battery->sbs;
3f86b832 626 int result = 0;
3f86b832 627
db1c291a 628 mutex_lock(&sbs->lock);
3f86b832 629
89862e3b 630 if (!battery->present) {
3f86b832
RT		 631 seq_printf(seq, "present: no\n");
632 goto end;
633 }
634
db1c291a 635 acpi_battery_get_alarm(battery);
3f86b832 636 seq_printf(seq, "alarm: ");
db1c291a 637 if (battery->alarm_capacity)
5a21e4fe 638 seq_printf(seq, "%i%sh\n",
db1c291a
AS		 639 battery->alarm_capacity *
640 acpi_battery_scale(battery),
641 acpi_battery_units(battery));
642 else
3f86b832 643 seq_printf(seq, "disabled\n");
3f86b832 644 end:
db1c291a 645 mutex_unlock(&sbs->lock);
635227ee 646 return result;
3f86b832
RT		 647}
648
649static ssize_t
650acpi_battery_write_alarm(struct file *file, const char __user * buffer,
651 size_t count, loff_t * ppos)
652{
50dd0969
JE		 653 struct seq_file *seq = file->private_data;
654 struct acpi_battery *battery = seq->private;
72206233 655 struct acpi_sbs *sbs = battery->sbs;
3f86b832 656 char alarm_string[12] = { '\0' };
db1c291a
AS		 657 int result = 0;
658 mutex_lock(&sbs->lock);
89862e3b 659 if (!battery->present) {
3f86b832
RT		 660 result = -ENODEV;
661 goto end;
662 }
3f86b832
RT		 663 if (count > sizeof(alarm_string) - 1) {
664 result = -EINVAL;
665 goto end;
666 }
3f86b832
RT		 667 if (copy_from_user(alarm_string, buffer, count)) {
668 result = -EFAULT;
669 goto end;
670 }
3f86b832 671 alarm_string[count] = 0;
94f6c086
AS		 672 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
673 acpi_battery_scale(battery);
db1c291a 674 acpi_battery_set_alarm(battery);
3f86b832 675 end:
db1c291a
AS		 676 mutex_unlock(&sbs->lock);
677 if (result)
635227ee 678 return result;
db1c291a 679 return count;
3f86b832
RT		 680}
681
682static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
683{
684 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
685}
686
687static struct file_operations acpi_battery_info_fops = {
688 .open = acpi_battery_info_open_fs,
689 .read = seq_read,
690 .llseek = seq_lseek,
691 .release = single_release,
692 .owner = THIS_MODULE,
693};
694
695static struct file_operations acpi_battery_state_fops = {
696 .open = acpi_battery_state_open_fs,
697 .read = seq_read,
698 .llseek = seq_lseek,
699 .release = single_release,
700 .owner = THIS_MODULE,
701};
702
703static struct file_operations acpi_battery_alarm_fops = {
704 .open = acpi_battery_alarm_open_fs,
705 .read = seq_read,
706 .write = acpi_battery_write_alarm,
707 .llseek = seq_lseek,
708 .release = single_release,
709 .owner = THIS_MODULE,
710};
711
712/* Legacy AC Adapter Interface */
713
714static struct proc_dir_entry *acpi_ac_dir = NULL;
715
716static int acpi_ac_read_state(struct seq_file *seq, void *offset)
717{
3f86b832 718
db1c291a 719 struct acpi_sbs *sbs = seq->private;
3f86b832 720
db1c291a 721 mutex_lock(&sbs->lock);
3f86b832
RT		 722
723 seq_printf(seq, "state: %s\n",
89862e3b 724 sbs->charger_present ? "on-line" : "off-line");
3f86b832 725
db1c291a 726 mutex_unlock(&sbs->lock);
635227ee 727 return 0;
3f86b832
RT		 728}
729
730static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
731{
732 return single_open(file, acpi_ac_read_state, PDE(inode)->data);
733}
734
735static struct file_operations acpi_ac_state_fops = {
736 .open = acpi_ac_state_open_fs,
737 .read = seq_read,
738 .llseek = seq_lseek,
739 .release = single_release,
740 .owner = THIS_MODULE,
741};
742
66e4b72b
AS		 743#endif
744
3f86b832
RT		 745/* --------------------------------------------------------------------------
746 Driver Interface
747 -------------------------------------------------------------------------- */
db1c291a 748static int acpi_battery_read(struct acpi_battery *battery)
3f86b832 749{
db1c291a
AS		 750 int result = 0, saved_present = battery->present;
751 u16 state;
3f86b832 752
db1c291a
AS		 753 if (battery->sbs->manager_present) {
754 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
755 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
756 if (!result)
757 battery->present = state & (1 << battery->id);
758 state &= 0x0fff;
759 state |= 1 << (battery->id + 12);
760 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
761 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
762 } else if (battery->id == 0)
763 battery->present = 1;
764 if (result || !battery->present)
765 return result;
3f86b832 766
db1c291a
AS		 767 if (saved_present != battery->present) {
768 battery->update_time = 0;
769 result = acpi_battery_get_info(battery);
770 if (result)
771 return result;
772 }
773 result = acpi_battery_get_state(battery);
774 return result;
775}
3f86b832 776
94f6c086 777/* Smart Battery */
db1c291a
AS		 778static int acpi_battery_add(struct acpi_sbs *sbs, int id)
779{
db1c291a 780 struct acpi_battery *battery = &sbs->battery[id];
94f6c086
AS		 781 int result;
782
3f86b832
RT		 783 battery->id = id;
784 battery->sbs = sbs;
db1c291a
AS		 785 result = acpi_battery_read(battery);
786 if (result)
787 return result;
3f86b832 788
db1c291a 789 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
fdcedbba 790#ifdef CONFIG_ACPI_PROCFS_POWER
db1c291a
AS		 791 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
792 battery->name, &acpi_battery_info_fops,
793 &acpi_battery_state_fops, &acpi_battery_alarm_fops,
794 battery);
66e4b72b 795#endif
94f6c086
AS		 796 battery->bat.name = battery->name;
797 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
798 if (!acpi_battery_mode(battery)) {
799 battery->bat.properties = sbs_charge_battery_props;
800 battery->bat.num_properties =
801 ARRAY_SIZE(sbs_charge_battery_props);
802 } else {
803 battery->bat.properties = sbs_energy_battery_props;
804 battery->bat.num_properties =
805 ARRAY_SIZE(sbs_energy_battery_props);
806 }
807 battery->bat.get_property = acpi_sbs_battery_get_property;
808 result = power_supply_register(&sbs->device->dev, &battery->bat);
037cbc63
JG		 809 if (result)
810 goto end;
811 result = device_create_file(battery->bat.dev, &alarm_attr);
812 if (result)
813 goto end;
814 battery->have_sysfs_alarm = 1;
815 end:
72206233 816 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
db1c291a
AS		 817 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
818 battery->name, sbs->battery->present ? "present" : "absent");
635227ee 819 return result;
3f86b832
RT		 820}
821
822static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
823{
037cbc63
JG		 824 struct acpi_battery *battery = &sbs->battery[id];
825
826 if (battery->bat.dev) {
827 if (battery->have_sysfs_alarm)
828 device_remove_file(battery->bat.dev, &alarm_attr);
829 power_supply_unregister(&battery->bat);
3f86b832 830 }
c2e46d2e 831#ifdef CONFIG_ACPI_PROCFS_POWER
037cbc63
JG		 832 if (battery->proc_entry)
833 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
66e4b72b 834#endif
3f86b832
RT		 835}
836
db1c291a 837static int acpi_charger_add(struct acpi_sbs *sbs)
3f86b832
RT		 838{
839 int result;
840
3f86b832 841 result = acpi_ac_get_present(sbs);
db1c291a 842 if (result)
3f86b832 843 goto end;
fdcedbba 844#ifdef CONFIG_ACPI_PROCFS_POWER
db1c291a
AS		 845 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
846 ACPI_AC_DIR_NAME, NULL,
847 &acpi_ac_state_fops, NULL, sbs);
848 if (result)
3f86b832 849 goto end;
66e4b72b 850#endif
94f6c086
AS		 851 sbs->charger.name = "sbs-charger";
852 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
853 sbs->charger.properties = sbs_ac_props;
854 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
855 sbs->charger.get_property = sbs_get_ac_property;
856 power_supply_register(&sbs->device->dev, &sbs->charger);
72206233
VL		 857 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
858 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
89862e3b 859 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
3f86b832 860 end:
635227ee 861 return result;
3f86b832
RT		 862}
863
db1c291a 864static void acpi_charger_remove(struct acpi_sbs *sbs)
3f86b832 865{
94f6c086
AS		 866 if (sbs->charger.dev)
867 power_supply_unregister(&sbs->charger);
fdcedbba 868#ifdef CONFIG_ACPI_PROCFS_POWER
db1c291a
AS		 869 if (sbs->charger_entry)
870 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
66e4b72b 871#endif
3f86b832
RT		 872}
873
db1c291a 874void acpi_sbs_callback(void *context)
3f86b832 875{
db1c291a
AS		 876 int id;
877 struct acpi_sbs *sbs = context;
878 struct acpi_battery *bat;
879 u8 saved_charger_state = sbs->charger_present;
880 u8 saved_battery_state;
881 acpi_ac_get_present(sbs);
882 if (sbs->charger_present != saved_charger_state) {
94f6c086 883#ifdef CONFIG_ACPI_PROC_EVENT
db1c291a
AS		 884 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
885 ACPI_SBS_NOTIFY_STATUS,
886 sbs->charger_present);
94f6c086
AS		 887#endif
888 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
3f86b832 889 }
db1c291a
AS		 890 if (sbs->manager_present) {
891 for (id = 0; id < MAX_SBS_BAT; ++id) {
892 if (!(sbs->batteries_supported & (1 << id)))
893 continue;
894 bat = &sbs->battery[id];
895 saved_battery_state = bat->present;
896 acpi_battery_read(bat);
897 if (saved_battery_state == bat->present)
898 continue;
94f6c086 899#ifdef CONFIG_ACPI_PROC_EVENT
db1c291a
AS		 900 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
901 bat->name,
902 ACPI_SBS_NOTIFY_STATUS,
903 bat->present);
94f6c086
AS		 904#endif
905 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
3f86b832 906 }
3f86b832 907 }
3f86b832
RT		 908}
909
db1c291a 910static int acpi_sbs_remove(struct acpi_device *device, int type);
3f86b832
RT		 911
912static int acpi_sbs_add(struct acpi_device *device)
913{
db1c291a
AS		 914 struct acpi_sbs *sbs;
915 int result = 0;
6d15702c 916 int id;
3f86b832 917
36bcbec7 918 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
3f86b832 919 if (!sbs) {
72206233
VL		 920 result = -ENOMEM;
921 goto end;
3f86b832 922 }
3f86b832 923
db1c291a 924 mutex_init(&sbs->lock);
72206233 925
91087dfa 926 sbs->hc = acpi_driver_data(device->parent);
db1c291a 927 sbs->device = device;
3f86b832
RT		 928 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
929 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
930 acpi_driver_data(device) = sbs;
931
db1c291a 932 result = acpi_charger_add(sbs);
72206233
VL		 933 if (result)
934 goto end;
3f86b832 935
db1c291a
AS		 936 result = acpi_manager_get_info(sbs);
937 if (!result) {
938 sbs->manager_present = 1;
939 for (id = 0; id < MAX_SBS_BAT; ++id)
940 if ((sbs->batteries_supported & (1 << id)))
941 acpi_battery_add(sbs, id);
942 } else
943 acpi_battery_add(sbs, 0);
944 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
3f86b832 945 end:
db1c291a
AS		 946 if (result)
947 acpi_sbs_remove(device, 0);
635227ee 948 return result;
3f86b832
RT		 949}
950
72206233 951static int acpi_sbs_remove(struct acpi_device *device, int type)
3f86b832 952{
cece9014 953 struct acpi_sbs *sbs;
3f86b832
RT		 954 int id;
955
db1c291a 956 if (!device)
963497c1 957 return -EINVAL;
72206233 958 sbs = acpi_driver_data(device);
db1c291a 959 if (!sbs)
635227ee 960 return -EINVAL;
db1c291a
AS		 961 mutex_lock(&sbs->lock);
962 acpi_smbus_unregister_callback(sbs->hc);
963 for (id = 0; id < MAX_SBS_BAT; ++id)
3f86b832 964 acpi_battery_remove(sbs, id);
db1c291a
AS		 965 acpi_charger_remove(sbs);
966 mutex_unlock(&sbs->lock);
967 mutex_destroy(&sbs->lock);
3f86b832 968 kfree(sbs);
635227ee 969 return 0;
3f86b832
RT		 970}
971
72206233
VL		 972static void acpi_sbs_rmdirs(void)
973{
fdcedbba 974#ifdef CONFIG_ACPI_PROCFS_POWER
72206233
VL		 975 if (acpi_ac_dir) {
976 acpi_unlock_ac_dir(acpi_ac_dir);
977 acpi_ac_dir = NULL;
978 }
979 if (acpi_battery_dir) {
980 acpi_unlock_battery_dir(acpi_battery_dir);
981 acpi_battery_dir = NULL;
982 }
66e4b72b 983#endif
72206233
VL		 984}
985
986static int acpi_sbs_resume(struct acpi_device *device)
987{
988 struct acpi_sbs *sbs;
72206233
VL		 989 if (!device)
990 return -EINVAL;
72206233 991 sbs = device->driver_data;
db1c291a 992 acpi_sbs_callback(sbs);
72206233
VL		 993 return 0;
994}
995
94f6c086
AS		 996static struct acpi_driver acpi_sbs_driver = {
997 .name = "sbs",
998 .class = ACPI_SBS_CLASS,
999 .ids = sbs_device_ids,
1000 .ops = {
1001 .add = acpi_sbs_add,
1002 .remove = acpi_sbs_remove,
1003 .resume = acpi_sbs_resume,
1004 },
1005};
1006
3f86b832
RT		 1007static int __init acpi_sbs_init(void)
1008{
1009 int result = 0;
1010
b20d2aeb
LB		 1011 if (acpi_disabled)
1012 return -ENODEV;
fdcedbba 1013#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 1014 acpi_ac_dir = acpi_lock_ac_dir();
94f6c086 1015 if (!acpi_ac_dir)
635227ee 1016 return -ENODEV;
3f86b832
RT		 1017 acpi_battery_dir = acpi_lock_battery_dir();
1018 if (!acpi_battery_dir) {
72206233 1019 acpi_sbs_rmdirs();
635227ee 1020 return -ENODEV;
3f86b832 1021 }
66e4b72b 1022#endif
3f86b832
RT		 1023 result = acpi_bus_register_driver(&acpi_sbs_driver);
1024 if (result < 0) {
72206233 1025 acpi_sbs_rmdirs();
635227ee 1026 return -ENODEV;
3f86b832 1027 }
635227ee 1028 return 0;
3f86b832
RT		 1029}
1030
1031static void __exit acpi_sbs_exit(void)
1032{
3f86b832 1033 acpi_bus_unregister_driver(&acpi_sbs_driver);
72206233 1034 acpi_sbs_rmdirs();
635227ee 1035 return;
3f86b832
RT		 1036}
1037
1038module_init(acpi_sbs_init);
1039module_exit(acpi_sbs_exit);
Linux 6.x block layer and io_uring tree(s)