Commit | Line | Data |
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b996ad0e RG |
1 | /* |
2 | * BQ27x00 battery driver | |
3 | * | |
4 | * Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it> | |
5 | * Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it> | |
7fb7ba58 | 6 | * Copyright (C) 2010-2011 Lars-Peter Clausen <lars@metafoo.de> |
73c244a8 | 7 | * Copyright (C) 2011 Pali Rohár <pali.rohar@gmail.com> |
b996ad0e RG |
8 | * |
9 | * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc. | |
10 | * | |
11 | * This package is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
17 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
18 | * | |
19 | */ | |
631c17ee PR |
20 | |
21 | /* | |
22 | * Datasheets: | |
23 | * http://focus.ti.com/docs/prod/folders/print/bq27000.html | |
24 | * http://focus.ti.com/docs/prod/folders/print/bq27500.html | |
25 | */ | |
26 | ||
b996ad0e RG |
27 | #include <linux/module.h> |
28 | #include <linux/param.h> | |
29 | #include <linux/jiffies.h> | |
30 | #include <linux/workqueue.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/platform_device.h> | |
33 | #include <linux/power_supply.h> | |
34 | #include <linux/idr.h> | |
b996ad0e | 35 | #include <linux/i2c.h> |
5a0e3ad6 | 36 | #include <linux/slab.h> |
8aef7e8f | 37 | #include <asm/unaligned.h> |
b996ad0e | 38 | |
7fb7ba58 LPC |
39 | #include <linux/power/bq27x00_battery.h> |
40 | ||
631c17ee | 41 | #define DRIVER_VERSION "1.2.0" |
b996ad0e RG |
42 | |
43 | #define BQ27x00_REG_TEMP 0x06 | |
44 | #define BQ27x00_REG_VOLT 0x08 | |
b996ad0e RG |
45 | #define BQ27x00_REG_AI 0x14 |
46 | #define BQ27x00_REG_FLAGS 0x0A | |
4e924a81 GI |
47 | #define BQ27x00_REG_TTE 0x16 |
48 | #define BQ27x00_REG_TTF 0x18 | |
49 | #define BQ27x00_REG_TTECP 0x26 | |
631c17ee PR |
50 | #define BQ27x00_REG_NAC 0x0C /* Nominal available capaciy */ |
51 | #define BQ27x00_REG_LMD 0x12 /* Last measured discharge */ | |
52 | #define BQ27x00_REG_CYCT 0x2A /* Cycle count total */ | |
53 | #define BQ27x00_REG_AE 0x22 /* Available enery */ | |
b996ad0e | 54 | |
e20908d9 | 55 | #define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */ |
631c17ee | 56 | #define BQ27000_REG_ILMD 0x76 /* Initial last measured discharge */ |
d66bab3f PR |
57 | #define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */ |
58 | #define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */ | |
c1b9ab67 | 59 | #define BQ27000_FLAG_FC BIT(5) |
d66bab3f | 60 | #define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */ |
e20908d9 | 61 | |
bf7d4140 | 62 | #define BQ27500_REG_SOC 0x2C |
631c17ee | 63 | #define BQ27500_REG_DCAP 0x3C /* Design capacity */ |
4e924a81 | 64 | #define BQ27500_FLAG_DSC BIT(0) |
d66bab3f PR |
65 | #define BQ27500_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */ |
66 | #define BQ27500_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */ | |
4e924a81 | 67 | #define BQ27500_FLAG_FC BIT(9) |
e20908d9 | 68 | |
a2e5118c PR |
69 | #define BQ27000_RS 20 /* Resistor sense */ |
70 | ||
b996ad0e RG |
71 | struct bq27x00_device_info; |
72 | struct bq27x00_access_methods { | |
297a533b | 73 | int (*read)(struct bq27x00_device_info *di, u8 reg, bool single); |
b996ad0e RG |
74 | }; |
75 | ||
e20908d9 GI |
76 | enum bq27x00_chip { BQ27000, BQ27500 }; |
77 | ||
297a533b LPC |
78 | struct bq27x00_reg_cache { |
79 | int temperature; | |
80 | int time_to_empty; | |
81 | int time_to_empty_avg; | |
82 | int time_to_full; | |
631c17ee | 83 | int charge_full; |
73c244a8 | 84 | int cycle_count; |
297a533b LPC |
85 | int capacity; |
86 | int flags; | |
297a533b LPC |
87 | }; |
88 | ||
b996ad0e RG |
89 | struct bq27x00_device_info { |
90 | struct device *dev; | |
91 | int id; | |
e20908d9 | 92 | enum bq27x00_chip chip; |
b996ad0e | 93 | |
297a533b | 94 | struct bq27x00_reg_cache cache; |
631c17ee PR |
95 | int charge_design_full; |
96 | ||
297a533b | 97 | unsigned long last_update; |
740b755a | 98 | struct delayed_work work; |
297a533b | 99 | |
a40402ef LPC |
100 | struct power_supply bat; |
101 | ||
102 | struct bq27x00_access_methods bus; | |
740b755a LPC |
103 | |
104 | struct mutex lock; | |
b996ad0e RG |
105 | }; |
106 | ||
107 | static enum power_supply_property bq27x00_battery_props[] = { | |
4e924a81 | 108 | POWER_SUPPLY_PROP_STATUS, |
b996ad0e RG |
109 | POWER_SUPPLY_PROP_PRESENT, |
110 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
111 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
112 | POWER_SUPPLY_PROP_CAPACITY, | |
d66bab3f | 113 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
b996ad0e | 114 | POWER_SUPPLY_PROP_TEMP, |
4e924a81 GI |
115 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
116 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
117 | POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, | |
5661f334 | 118 | POWER_SUPPLY_PROP_TECHNOLOGY, |
631c17ee PR |
119 | POWER_SUPPLY_PROP_CHARGE_FULL, |
120 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
121 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
73c244a8 | 122 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
631c17ee | 123 | POWER_SUPPLY_PROP_ENERGY_NOW, |
b996ad0e RG |
124 | }; |
125 | ||
740b755a LPC |
126 | static unsigned int poll_interval = 360; |
127 | module_param(poll_interval, uint, 0644); | |
128 | MODULE_PARM_DESC(poll_interval, "battery poll interval in seconds - " \ | |
129 | "0 disables polling"); | |
130 | ||
b996ad0e RG |
131 | /* |
132 | * Common code for BQ27x00 devices | |
133 | */ | |
134 | ||
a40402ef | 135 | static inline int bq27x00_read(struct bq27x00_device_info *di, u8 reg, |
297a533b | 136 | bool single) |
b996ad0e | 137 | { |
297a533b | 138 | return di->bus.read(di, reg, single); |
b996ad0e RG |
139 | } |
140 | ||
141 | /* | |
297a533b | 142 | * Return the battery Relative State-of-Charge |
b996ad0e RG |
143 | * Or < 0 if something fails. |
144 | */ | |
297a533b | 145 | static int bq27x00_battery_read_rsoc(struct bq27x00_device_info *di) |
b996ad0e | 146 | { |
297a533b | 147 | int rsoc; |
b996ad0e | 148 | |
e20908d9 | 149 | if (di->chip == BQ27500) |
297a533b | 150 | rsoc = bq27x00_read(di, BQ27500_REG_SOC, false); |
e20908d9 | 151 | else |
297a533b LPC |
152 | rsoc = bq27x00_read(di, BQ27000_REG_RSOC, true); |
153 | ||
154 | if (rsoc < 0) | |
155 | dev_err(di->dev, "error reading relative State-of-Charge\n"); | |
156 | ||
157 | return rsoc; | |
b996ad0e RG |
158 | } |
159 | ||
631c17ee PR |
160 | /* |
161 | * Return a battery charge value in µAh | |
162 | * Or < 0 if something fails. | |
163 | */ | |
164 | static int bq27x00_battery_read_charge(struct bq27x00_device_info *di, u8 reg) | |
165 | { | |
166 | int charge; | |
167 | ||
168 | charge = bq27x00_read(di, reg, false); | |
169 | if (charge < 0) { | |
170 | dev_err(di->dev, "error reading nominal available capacity\n"); | |
171 | return charge; | |
172 | } | |
173 | ||
174 | if (di->chip == BQ27500) | |
175 | charge *= 1000; | |
176 | else | |
177 | charge = charge * 3570 / BQ27000_RS; | |
178 | ||
179 | return charge; | |
180 | } | |
181 | ||
182 | /* | |
183 | * Return the battery Nominal available capaciy in µAh | |
184 | * Or < 0 if something fails. | |
185 | */ | |
186 | static inline int bq27x00_battery_read_nac(struct bq27x00_device_info *di) | |
187 | { | |
188 | return bq27x00_battery_read_charge(di, BQ27x00_REG_NAC); | |
189 | } | |
190 | ||
191 | /* | |
192 | * Return the battery Last measured discharge in µAh | |
193 | * Or < 0 if something fails. | |
194 | */ | |
195 | static inline int bq27x00_battery_read_lmd(struct bq27x00_device_info *di) | |
196 | { | |
197 | return bq27x00_battery_read_charge(di, BQ27x00_REG_LMD); | |
198 | } | |
199 | ||
200 | /* | |
201 | * Return the battery Initial last measured discharge in µAh | |
202 | * Or < 0 if something fails. | |
203 | */ | |
204 | static int bq27x00_battery_read_ilmd(struct bq27x00_device_info *di) | |
205 | { | |
206 | int ilmd; | |
207 | ||
208 | if (di->chip == BQ27500) | |
209 | ilmd = bq27x00_read(di, BQ27500_REG_DCAP, false); | |
210 | else | |
211 | ilmd = bq27x00_read(di, BQ27000_REG_ILMD, true); | |
212 | ||
213 | if (ilmd < 0) { | |
214 | dev_err(di->dev, "error reading initial last measured discharge\n"); | |
215 | return ilmd; | |
216 | } | |
217 | ||
218 | if (di->chip == BQ27500) | |
219 | ilmd *= 1000; | |
220 | else | |
221 | ilmd = ilmd * 256 * 3570 / BQ27000_RS; | |
222 | ||
223 | return ilmd; | |
224 | } | |
225 | ||
226 | /* | |
227 | * Return the battery Cycle count total | |
228 | * Or < 0 if something fails. | |
229 | */ | |
230 | static int bq27x00_battery_read_cyct(struct bq27x00_device_info *di) | |
231 | { | |
232 | int cyct; | |
233 | ||
234 | cyct = bq27x00_read(di, BQ27x00_REG_CYCT, false); | |
235 | if (cyct < 0) | |
236 | dev_err(di->dev, "error reading cycle count total\n"); | |
237 | ||
238 | return cyct; | |
239 | } | |
240 | ||
b996ad0e | 241 | /* |
297a533b LPC |
242 | * Read a time register. |
243 | * Return < 0 if something fails. | |
b996ad0e | 244 | */ |
297a533b | 245 | static int bq27x00_battery_read_time(struct bq27x00_device_info *di, u8 reg) |
b996ad0e | 246 | { |
297a533b | 247 | int tval; |
b996ad0e | 248 | |
297a533b LPC |
249 | tval = bq27x00_read(di, reg, false); |
250 | if (tval < 0) { | |
251 | dev_err(di->dev, "error reading register %02x: %d\n", reg, tval); | |
252 | return tval; | |
b996ad0e RG |
253 | } |
254 | ||
297a533b LPC |
255 | if (tval == 65535) |
256 | return -ENODATA; | |
257 | ||
258 | return tval * 60; | |
259 | } | |
260 | ||
261 | static void bq27x00_update(struct bq27x00_device_info *di) | |
262 | { | |
263 | struct bq27x00_reg_cache cache = {0, }; | |
264 | bool is_bq27500 = di->chip == BQ27500; | |
265 | ||
266 | cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, is_bq27500); | |
267 | if (cache.flags >= 0) { | |
268 | cache.capacity = bq27x00_battery_read_rsoc(di); | |
269 | cache.temperature = bq27x00_read(di, BQ27x00_REG_TEMP, false); | |
270 | cache.time_to_empty = bq27x00_battery_read_time(di, BQ27x00_REG_TTE); | |
271 | cache.time_to_empty_avg = bq27x00_battery_read_time(di, BQ27x00_REG_TTECP); | |
272 | cache.time_to_full = bq27x00_battery_read_time(di, BQ27x00_REG_TTF); | |
631c17ee | 273 | cache.charge_full = bq27x00_battery_read_lmd(di); |
73c244a8 | 274 | cache.cycle_count = bq27x00_battery_read_cyct(di); |
297a533b | 275 | |
631c17ee PR |
276 | /* We only have to read charge design full once */ |
277 | if (di->charge_design_full <= 0) | |
278 | di->charge_design_full = bq27x00_battery_read_ilmd(di); | |
297a533b LPC |
279 | } |
280 | ||
b68f6216 | 281 | if (memcmp(&di->cache, &cache, sizeof(cache)) != 0) { |
297a533b LPC |
282 | di->cache = cache; |
283 | power_supply_changed(&di->bat); | |
284 | } | |
285 | ||
286 | di->last_update = jiffies; | |
287 | } | |
288 | ||
740b755a LPC |
289 | static void bq27x00_battery_poll(struct work_struct *work) |
290 | { | |
291 | struct bq27x00_device_info *di = | |
292 | container_of(work, struct bq27x00_device_info, work.work); | |
293 | ||
294 | bq27x00_update(di); | |
295 | ||
296 | if (poll_interval > 0) { | |
297 | /* The timer does not have to be accurate. */ | |
298 | set_timer_slack(&di->work.timer, poll_interval * HZ / 4); | |
299 | schedule_delayed_work(&di->work, poll_interval * HZ); | |
300 | } | |
301 | } | |
302 | ||
303 | ||
297a533b LPC |
304 | /* |
305 | * Return the battery temperature in tenths of degree Celsius | |
306 | * Or < 0 if something fails. | |
307 | */ | |
308 | static int bq27x00_battery_temperature(struct bq27x00_device_info *di, | |
309 | union power_supply_propval *val) | |
310 | { | |
311 | if (di->cache.temperature < 0) | |
312 | return di->cache.temperature; | |
313 | ||
314 | if (di->chip == BQ27500) | |
315 | val->intval = di->cache.temperature - 2731; | |
316 | else | |
317 | val->intval = ((di->cache.temperature * 5) - 5463) / 2; | |
318 | ||
319 | return 0; | |
b996ad0e RG |
320 | } |
321 | ||
322 | /* | |
bf7d4140 | 323 | * Return the battery average current in µA |
b996ad0e RG |
324 | * Note that current can be negative signed as well |
325 | * Or 0 if something fails. | |
326 | */ | |
297a533b LPC |
327 | static int bq27x00_battery_current(struct bq27x00_device_info *di, |
328 | union power_supply_propval *val) | |
b996ad0e | 329 | { |
297a533b | 330 | int curr; |
b68f6216 | 331 | int flags; |
b996ad0e | 332 | |
b68f6216 | 333 | curr = bq27x00_read(di, BQ27x00_REG_AI, false); |
297a533b LPC |
334 | if (curr < 0) |
335 | return curr; | |
e20908d9 GI |
336 | |
337 | if (di->chip == BQ27500) { | |
338 | /* bq27500 returns signed value */ | |
297a533b | 339 | val->intval = (int)((s16)curr) * 1000; |
e20908d9 | 340 | } else { |
b68f6216 PR |
341 | flags = bq27x00_read(di, BQ27x00_REG_FLAGS, false); |
342 | if (flags & BQ27000_FLAG_CHGS) { | |
e20908d9 | 343 | dev_dbg(di->dev, "negative current!\n"); |
afbc74fd | 344 | curr = -curr; |
e20908d9 | 345 | } |
b996ad0e | 346 | |
297a533b | 347 | val->intval = curr * 3570 / BQ27000_RS; |
b996ad0e RG |
348 | } |
349 | ||
297a533b | 350 | return 0; |
b996ad0e RG |
351 | } |
352 | ||
4e924a81 | 353 | static int bq27x00_battery_status(struct bq27x00_device_info *di, |
297a533b | 354 | union power_supply_propval *val) |
4e924a81 | 355 | { |
4e924a81 | 356 | int status; |
4e924a81 GI |
357 | |
358 | if (di->chip == BQ27500) { | |
297a533b | 359 | if (di->cache.flags & BQ27500_FLAG_FC) |
4e924a81 | 360 | status = POWER_SUPPLY_STATUS_FULL; |
297a533b | 361 | else if (di->cache.flags & BQ27500_FLAG_DSC) |
4e924a81 GI |
362 | status = POWER_SUPPLY_STATUS_DISCHARGING; |
363 | else | |
364 | status = POWER_SUPPLY_STATUS_CHARGING; | |
365 | } else { | |
c1b9ab67 LPC |
366 | if (di->cache.flags & BQ27000_FLAG_FC) |
367 | status = POWER_SUPPLY_STATUS_FULL; | |
368 | else if (di->cache.flags & BQ27000_FLAG_CHGS) | |
4e924a81 | 369 | status = POWER_SUPPLY_STATUS_CHARGING; |
c1b9ab67 LPC |
370 | else if (power_supply_am_i_supplied(&di->bat)) |
371 | status = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
4e924a81 GI |
372 | else |
373 | status = POWER_SUPPLY_STATUS_DISCHARGING; | |
374 | } | |
375 | ||
376 | val->intval = status; | |
297a533b | 377 | |
4e924a81 GI |
378 | return 0; |
379 | } | |
380 | ||
d66bab3f PR |
381 | static int bq27x00_battery_capacity_level(struct bq27x00_device_info *di, |
382 | union power_supply_propval *val) | |
383 | { | |
384 | int level; | |
385 | ||
386 | if (di->chip == BQ27500) { | |
387 | if (di->cache.flags & BQ27500_FLAG_FC) | |
388 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
389 | else if (di->cache.flags & BQ27500_FLAG_SOC1) | |
390 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; | |
391 | else if (di->cache.flags & BQ27500_FLAG_SOCF) | |
392 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
393 | else | |
394 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
395 | } else { | |
396 | if (di->cache.flags & BQ27000_FLAG_FC) | |
397 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
398 | else if (di->cache.flags & BQ27000_FLAG_EDV1) | |
399 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; | |
400 | else if (di->cache.flags & BQ27000_FLAG_EDVF) | |
401 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
402 | else | |
403 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
404 | } | |
405 | ||
406 | val->intval = level; | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
4e924a81 | 411 | /* |
297a533b LPC |
412 | * Return the battery Voltage in milivolts |
413 | * Or < 0 if something fails. | |
4e924a81 | 414 | */ |
297a533b LPC |
415 | static int bq27x00_battery_voltage(struct bq27x00_device_info *di, |
416 | union power_supply_propval *val) | |
4e924a81 | 417 | { |
297a533b | 418 | int volt; |
4e924a81 | 419 | |
297a533b LPC |
420 | volt = bq27x00_read(di, BQ27x00_REG_VOLT, false); |
421 | if (volt < 0) | |
422 | return volt; | |
4e924a81 | 423 | |
297a533b LPC |
424 | val->intval = volt * 1000; |
425 | ||
426 | return 0; | |
427 | } | |
428 | ||
631c17ee PR |
429 | /* |
430 | * Return the battery Available energy in µWh | |
431 | * Or < 0 if something fails. | |
432 | */ | |
433 | static int bq27x00_battery_energy(struct bq27x00_device_info *di, | |
434 | union power_supply_propval *val) | |
435 | { | |
436 | int ae; | |
437 | ||
438 | ae = bq27x00_read(di, BQ27x00_REG_AE, false); | |
439 | if (ae < 0) { | |
440 | dev_err(di->dev, "error reading available energy\n"); | |
441 | return ae; | |
442 | } | |
443 | ||
444 | if (di->chip == BQ27500) | |
445 | ae *= 1000; | |
446 | else | |
447 | ae = ae * 29200 / BQ27000_RS; | |
448 | ||
449 | val->intval = ae; | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
454 | ||
297a533b LPC |
455 | static int bq27x00_simple_value(int value, |
456 | union power_supply_propval *val) | |
457 | { | |
458 | if (value < 0) | |
459 | return value; | |
460 | ||
461 | val->intval = value; | |
4e924a81 | 462 | |
4e924a81 GI |
463 | return 0; |
464 | } | |
465 | ||
b996ad0e RG |
466 | #define to_bq27x00_device_info(x) container_of((x), \ |
467 | struct bq27x00_device_info, bat); | |
468 | ||
469 | static int bq27x00_battery_get_property(struct power_supply *psy, | |
470 | enum power_supply_property psp, | |
471 | union power_supply_propval *val) | |
472 | { | |
4e924a81 | 473 | int ret = 0; |
b996ad0e | 474 | struct bq27x00_device_info *di = to_bq27x00_device_info(psy); |
3413b4ea | 475 | |
740b755a LPC |
476 | mutex_lock(&di->lock); |
477 | if (time_is_before_jiffies(di->last_update + 5 * HZ)) { | |
478 | cancel_delayed_work_sync(&di->work); | |
479 | bq27x00_battery_poll(&di->work.work); | |
480 | } | |
481 | mutex_unlock(&di->lock); | |
297a533b LPC |
482 | |
483 | if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0) | |
3413b4ea | 484 | return -ENODEV; |
b996ad0e RG |
485 | |
486 | switch (psp) { | |
4e924a81 GI |
487 | case POWER_SUPPLY_PROP_STATUS: |
488 | ret = bq27x00_battery_status(di, val); | |
489 | break; | |
b996ad0e | 490 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
297a533b | 491 | ret = bq27x00_battery_voltage(di, val); |
3413b4ea | 492 | break; |
b996ad0e | 493 | case POWER_SUPPLY_PROP_PRESENT: |
297a533b | 494 | val->intval = di->cache.flags < 0 ? 0 : 1; |
b996ad0e RG |
495 | break; |
496 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
297a533b | 497 | ret = bq27x00_battery_current(di, val); |
b996ad0e RG |
498 | break; |
499 | case POWER_SUPPLY_PROP_CAPACITY: | |
297a533b | 500 | ret = bq27x00_simple_value(di->cache.capacity, val); |
b996ad0e | 501 | break; |
d66bab3f PR |
502 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
503 | ret = bq27x00_battery_capacity_level(di, val); | |
504 | break; | |
b996ad0e | 505 | case POWER_SUPPLY_PROP_TEMP: |
297a533b | 506 | ret = bq27x00_battery_temperature(di, val); |
b996ad0e | 507 | break; |
4e924a81 | 508 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: |
297a533b | 509 | ret = bq27x00_simple_value(di->cache.time_to_empty, val); |
4e924a81 GI |
510 | break; |
511 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: | |
297a533b | 512 | ret = bq27x00_simple_value(di->cache.time_to_empty_avg, val); |
4e924a81 GI |
513 | break; |
514 | case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW: | |
297a533b | 515 | ret = bq27x00_simple_value(di->cache.time_to_full, val); |
4e924a81 | 516 | break; |
5661f334 LPC |
517 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
518 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; | |
519 | break; | |
631c17ee PR |
520 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
521 | ret = bq27x00_simple_value(bq27x00_battery_read_nac(di), val); | |
522 | break; | |
523 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
524 | ret = bq27x00_simple_value(di->cache.charge_full, val); | |
525 | break; | |
526 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
527 | ret = bq27x00_simple_value(di->charge_design_full, val); | |
528 | break; | |
73c244a8 PR |
529 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
530 | ret = bq27x00_simple_value(di->cache.cycle_count, val); | |
631c17ee PR |
531 | break; |
532 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
533 | ret = bq27x00_battery_energy(di, val); | |
534 | break; | |
b996ad0e RG |
535 | default: |
536 | return -EINVAL; | |
537 | } | |
538 | ||
4e924a81 | 539 | return ret; |
b996ad0e RG |
540 | } |
541 | ||
740b755a LPC |
542 | static void bq27x00_external_power_changed(struct power_supply *psy) |
543 | { | |
544 | struct bq27x00_device_info *di = to_bq27x00_device_info(psy); | |
545 | ||
546 | cancel_delayed_work_sync(&di->work); | |
547 | schedule_delayed_work(&di->work, 0); | |
548 | } | |
549 | ||
a40402ef | 550 | static int bq27x00_powersupply_init(struct bq27x00_device_info *di) |
b996ad0e | 551 | { |
a40402ef LPC |
552 | int ret; |
553 | ||
b996ad0e RG |
554 | di->bat.type = POWER_SUPPLY_TYPE_BATTERY; |
555 | di->bat.properties = bq27x00_battery_props; | |
556 | di->bat.num_properties = ARRAY_SIZE(bq27x00_battery_props); | |
557 | di->bat.get_property = bq27x00_battery_get_property; | |
740b755a LPC |
558 | di->bat.external_power_changed = bq27x00_external_power_changed; |
559 | ||
560 | INIT_DELAYED_WORK(&di->work, bq27x00_battery_poll); | |
561 | mutex_init(&di->lock); | |
a40402ef LPC |
562 | |
563 | ret = power_supply_register(di->dev, &di->bat); | |
564 | if (ret) { | |
565 | dev_err(di->dev, "failed to register battery: %d\n", ret); | |
566 | return ret; | |
567 | } | |
568 | ||
569 | dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION); | |
570 | ||
297a533b LPC |
571 | bq27x00_update(di); |
572 | ||
a40402ef | 573 | return 0; |
b996ad0e RG |
574 | } |
575 | ||
740b755a LPC |
576 | static void bq27x00_powersupply_unregister(struct bq27x00_device_info *di) |
577 | { | |
578 | cancel_delayed_work_sync(&di->work); | |
579 | ||
580 | power_supply_unregister(&di->bat); | |
581 | ||
582 | mutex_destroy(&di->lock); | |
583 | } | |
584 | ||
7fb7ba58 LPC |
585 | |
586 | /* i2c specific code */ | |
587 | #ifdef CONFIG_BATTERY_BQ27X00_I2C | |
588 | ||
589 | /* If the system has several batteries we need a different name for each | |
590 | * of them... | |
b996ad0e | 591 | */ |
7fb7ba58 LPC |
592 | static DEFINE_IDR(battery_id); |
593 | static DEFINE_MUTEX(battery_mutex); | |
b996ad0e | 594 | |
297a533b | 595 | static int bq27x00_read_i2c(struct bq27x00_device_info *di, u8 reg, bool single) |
b996ad0e | 596 | { |
a40402ef | 597 | struct i2c_client *client = to_i2c_client(di->dev); |
9e912f45 | 598 | struct i2c_msg msg[2]; |
b996ad0e | 599 | unsigned char data[2]; |
297a533b | 600 | int ret; |
b996ad0e RG |
601 | |
602 | if (!client->adapter) | |
603 | return -ENODEV; | |
604 | ||
9e912f45 GI |
605 | msg[0].addr = client->addr; |
606 | msg[0].flags = 0; | |
607 | msg[0].buf = ® | |
608 | msg[0].len = sizeof(reg); | |
609 | msg[1].addr = client->addr; | |
610 | msg[1].flags = I2C_M_RD; | |
611 | msg[1].buf = data; | |
2ec523a8 | 612 | if (single) |
9e912f45 | 613 | msg[1].len = 1; |
2ec523a8 | 614 | else |
9e912f45 | 615 | msg[1].len = 2; |
2ec523a8 | 616 | |
9e912f45 | 617 | ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); |
2ec523a8 LPC |
618 | if (ret < 0) |
619 | return ret; | |
620 | ||
621 | if (!single) | |
622 | ret = get_unaligned_le16(data); | |
623 | else | |
624 | ret = data[0]; | |
b996ad0e | 625 | |
297a533b | 626 | return ret; |
b996ad0e RG |
627 | } |
628 | ||
e20908d9 | 629 | static int bq27x00_battery_probe(struct i2c_client *client, |
b996ad0e RG |
630 | const struct i2c_device_id *id) |
631 | { | |
632 | char *name; | |
633 | struct bq27x00_device_info *di; | |
b996ad0e RG |
634 | int num; |
635 | int retval = 0; | |
636 | ||
637 | /* Get new ID for the new battery device */ | |
638 | retval = idr_pre_get(&battery_id, GFP_KERNEL); | |
639 | if (retval == 0) | |
640 | return -ENOMEM; | |
641 | mutex_lock(&battery_mutex); | |
642 | retval = idr_get_new(&battery_id, client, &num); | |
643 | mutex_unlock(&battery_mutex); | |
644 | if (retval < 0) | |
645 | return retval; | |
646 | ||
e20908d9 | 647 | name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num); |
b996ad0e RG |
648 | if (!name) { |
649 | dev_err(&client->dev, "failed to allocate device name\n"); | |
650 | retval = -ENOMEM; | |
651 | goto batt_failed_1; | |
652 | } | |
653 | ||
654 | di = kzalloc(sizeof(*di), GFP_KERNEL); | |
655 | if (!di) { | |
656 | dev_err(&client->dev, "failed to allocate device info data\n"); | |
657 | retval = -ENOMEM; | |
658 | goto batt_failed_2; | |
659 | } | |
a40402ef | 660 | |
b996ad0e | 661 | di->id = num; |
a40402ef | 662 | di->dev = &client->dev; |
e20908d9 | 663 | di->chip = id->driver_data; |
a40402ef LPC |
664 | di->bat.name = name; |
665 | di->bus.read = &bq27x00_read_i2c; | |
b996ad0e | 666 | |
a40402ef | 667 | if (bq27x00_powersupply_init(di)) |
b996ad0e | 668 | goto batt_failed_3; |
b996ad0e RG |
669 | |
670 | i2c_set_clientdata(client, di); | |
b996ad0e RG |
671 | |
672 | return 0; | |
673 | ||
b996ad0e RG |
674 | batt_failed_3: |
675 | kfree(di); | |
676 | batt_failed_2: | |
677 | kfree(name); | |
678 | batt_failed_1: | |
679 | mutex_lock(&battery_mutex); | |
680 | idr_remove(&battery_id, num); | |
681 | mutex_unlock(&battery_mutex); | |
682 | ||
683 | return retval; | |
684 | } | |
685 | ||
e20908d9 | 686 | static int bq27x00_battery_remove(struct i2c_client *client) |
b996ad0e RG |
687 | { |
688 | struct bq27x00_device_info *di = i2c_get_clientdata(client); | |
689 | ||
740b755a | 690 | bq27x00_powersupply_unregister(di); |
b996ad0e RG |
691 | |
692 | kfree(di->bat.name); | |
693 | ||
694 | mutex_lock(&battery_mutex); | |
695 | idr_remove(&battery_id, di->id); | |
696 | mutex_unlock(&battery_mutex); | |
697 | ||
698 | kfree(di); | |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
e20908d9 GI |
703 | static const struct i2c_device_id bq27x00_id[] = { |
704 | { "bq27200", BQ27000 }, /* bq27200 is same as bq27000, but with i2c */ | |
705 | { "bq27500", BQ27500 }, | |
b996ad0e RG |
706 | {}, |
707 | }; | |
fd9b958c | 708 | MODULE_DEVICE_TABLE(i2c, bq27x00_id); |
b996ad0e | 709 | |
e20908d9 | 710 | static struct i2c_driver bq27x00_battery_driver = { |
b996ad0e | 711 | .driver = { |
e20908d9 | 712 | .name = "bq27x00-battery", |
b996ad0e | 713 | }, |
e20908d9 GI |
714 | .probe = bq27x00_battery_probe, |
715 | .remove = bq27x00_battery_remove, | |
716 | .id_table = bq27x00_id, | |
b996ad0e RG |
717 | }; |
718 | ||
7fb7ba58 LPC |
719 | static inline int bq27x00_battery_i2c_init(void) |
720 | { | |
721 | int ret = i2c_add_driver(&bq27x00_battery_driver); | |
722 | if (ret) | |
723 | printk(KERN_ERR "Unable to register BQ27x00 i2c driver\n"); | |
724 | ||
725 | return ret; | |
726 | } | |
727 | ||
728 | static inline void bq27x00_battery_i2c_exit(void) | |
729 | { | |
730 | i2c_del_driver(&bq27x00_battery_driver); | |
731 | } | |
732 | ||
733 | #else | |
734 | ||
735 | static inline int bq27x00_battery_i2c_init(void) { return 0; } | |
736 | static inline void bq27x00_battery_i2c_exit(void) {}; | |
737 | ||
738 | #endif | |
739 | ||
740 | /* platform specific code */ | |
741 | #ifdef CONFIG_BATTERY_BQ27X00_PLATFORM | |
742 | ||
743 | static int bq27000_read_platform(struct bq27x00_device_info *di, u8 reg, | |
297a533b | 744 | bool single) |
7fb7ba58 LPC |
745 | { |
746 | struct device *dev = di->dev; | |
747 | struct bq27000_platform_data *pdata = dev->platform_data; | |
748 | unsigned int timeout = 3; | |
749 | int upper, lower; | |
750 | int temp; | |
751 | ||
752 | if (!single) { | |
753 | /* Make sure the value has not changed in between reading the | |
754 | * lower and the upper part */ | |
755 | upper = pdata->read(dev, reg + 1); | |
756 | do { | |
757 | temp = upper; | |
758 | if (upper < 0) | |
759 | return upper; | |
760 | ||
761 | lower = pdata->read(dev, reg); | |
762 | if (lower < 0) | |
763 | return lower; | |
764 | ||
765 | upper = pdata->read(dev, reg + 1); | |
766 | } while (temp != upper && --timeout); | |
767 | ||
768 | if (timeout == 0) | |
769 | return -EIO; | |
770 | ||
297a533b | 771 | return (upper << 8) | lower; |
7fb7ba58 | 772 | } |
297a533b LPC |
773 | |
774 | return pdata->read(dev, reg); | |
7fb7ba58 LPC |
775 | } |
776 | ||
777 | static int __devinit bq27000_battery_probe(struct platform_device *pdev) | |
778 | { | |
779 | struct bq27x00_device_info *di; | |
780 | struct bq27000_platform_data *pdata = pdev->dev.platform_data; | |
781 | int ret; | |
782 | ||
783 | if (!pdata) { | |
784 | dev_err(&pdev->dev, "no platform_data supplied\n"); | |
785 | return -EINVAL; | |
786 | } | |
787 | ||
788 | if (!pdata->read) { | |
789 | dev_err(&pdev->dev, "no hdq read callback supplied\n"); | |
790 | return -EINVAL; | |
791 | } | |
792 | ||
793 | di = kzalloc(sizeof(*di), GFP_KERNEL); | |
794 | if (!di) { | |
795 | dev_err(&pdev->dev, "failed to allocate device info data\n"); | |
796 | return -ENOMEM; | |
797 | } | |
798 | ||
799 | platform_set_drvdata(pdev, di); | |
800 | ||
801 | di->dev = &pdev->dev; | |
802 | di->chip = BQ27000; | |
803 | ||
804 | di->bat.name = pdata->name ?: dev_name(&pdev->dev); | |
805 | di->bus.read = &bq27000_read_platform; | |
806 | ||
807 | ret = bq27x00_powersupply_init(di); | |
808 | if (ret) | |
809 | goto err_free; | |
810 | ||
811 | return 0; | |
812 | ||
813 | err_free: | |
814 | platform_set_drvdata(pdev, NULL); | |
815 | kfree(di); | |
816 | ||
817 | return ret; | |
818 | } | |
819 | ||
820 | static int __devexit bq27000_battery_remove(struct platform_device *pdev) | |
821 | { | |
822 | struct bq27x00_device_info *di = platform_get_drvdata(pdev); | |
823 | ||
740b755a LPC |
824 | bq27x00_powersupply_unregister(di); |
825 | ||
7fb7ba58 LPC |
826 | platform_set_drvdata(pdev, NULL); |
827 | kfree(di); | |
828 | ||
829 | return 0; | |
830 | } | |
831 | ||
832 | static struct platform_driver bq27000_battery_driver = { | |
833 | .probe = bq27000_battery_probe, | |
834 | .remove = __devexit_p(bq27000_battery_remove), | |
835 | .driver = { | |
836 | .name = "bq27000-battery", | |
837 | .owner = THIS_MODULE, | |
838 | }, | |
839 | }; | |
840 | ||
841 | static inline int bq27x00_battery_platform_init(void) | |
842 | { | |
843 | int ret = platform_driver_register(&bq27000_battery_driver); | |
844 | if (ret) | |
845 | printk(KERN_ERR "Unable to register BQ27000 platform driver\n"); | |
846 | ||
847 | return ret; | |
848 | } | |
849 | ||
850 | static inline void bq27x00_battery_platform_exit(void) | |
851 | { | |
852 | platform_driver_unregister(&bq27000_battery_driver); | |
853 | } | |
854 | ||
855 | #else | |
856 | ||
857 | static inline int bq27x00_battery_platform_init(void) { return 0; } | |
858 | static inline void bq27x00_battery_platform_exit(void) {}; | |
859 | ||
860 | #endif | |
861 | ||
862 | /* | |
863 | * Module stuff | |
864 | */ | |
865 | ||
b996ad0e RG |
866 | static int __init bq27x00_battery_init(void) |
867 | { | |
868 | int ret; | |
869 | ||
7fb7ba58 LPC |
870 | ret = bq27x00_battery_i2c_init(); |
871 | if (ret) | |
872 | return ret; | |
873 | ||
874 | ret = bq27x00_battery_platform_init(); | |
b996ad0e | 875 | if (ret) |
7fb7ba58 | 876 | bq27x00_battery_i2c_exit(); |
b996ad0e RG |
877 | |
878 | return ret; | |
879 | } | |
880 | module_init(bq27x00_battery_init); | |
881 | ||
882 | static void __exit bq27x00_battery_exit(void) | |
883 | { | |
7fb7ba58 LPC |
884 | bq27x00_battery_platform_exit(); |
885 | bq27x00_battery_i2c_exit(); | |
b996ad0e RG |
886 | } |
887 | module_exit(bq27x00_battery_exit); | |
888 | ||
889 | MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>"); | |
890 | MODULE_DESCRIPTION("BQ27x00 battery monitor driver"); | |
891 | MODULE_LICENSE("GPL"); |