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0bc98cc6 | 1 | /* |
6c47a3e0 AV |
2 | * bq2415x charger driver |
3 | * | |
32260308 | 4 | * Copyright (C) 2011-2013 Pali Rohár <pali.rohar@gmail.com> |
6c47a3e0 AV |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 | */ | |
0bc98cc6 PR |
20 | |
21 | /* | |
6c47a3e0 AV |
22 | * Datasheets: |
23 | * http://www.ti.com/product/bq24150 | |
24 | * http://www.ti.com/product/bq24150a | |
25 | * http://www.ti.com/product/bq24152 | |
26 | * http://www.ti.com/product/bq24153 | |
27 | * http://www.ti.com/product/bq24153a | |
28 | * http://www.ti.com/product/bq24155 | |
29 | */ | |
0bc98cc6 | 30 | |
0bc98cc6 PR |
31 | #include <linux/kernel.h> |
32 | #include <linux/module.h> | |
33 | #include <linux/param.h> | |
34 | #include <linux/err.h> | |
35 | #include <linux/workqueue.h> | |
36 | #include <linux/sysfs.h> | |
37 | #include <linux/platform_device.h> | |
38 | #include <linux/power_supply.h> | |
39 | #include <linux/idr.h> | |
40 | #include <linux/i2c.h> | |
41 | #include <linux/slab.h> | |
42 | ||
43 | #include <linux/power/bq2415x_charger.h> | |
44 | ||
45 | /* timeout for resetting chip timer */ | |
46 | #define BQ2415X_TIMER_TIMEOUT 10 | |
47 | ||
48 | #define BQ2415X_REG_STATUS 0x00 | |
49 | #define BQ2415X_REG_CONTROL 0x01 | |
50 | #define BQ2415X_REG_VOLTAGE 0x02 | |
51 | #define BQ2415X_REG_VENDER 0x03 | |
52 | #define BQ2415X_REG_CURRENT 0x04 | |
53 | ||
54 | /* reset state for all registers */ | |
55 | #define BQ2415X_RESET_STATUS BIT(6) | |
56 | #define BQ2415X_RESET_CONTROL (BIT(4)|BIT(5)) | |
57 | #define BQ2415X_RESET_VOLTAGE (BIT(1)|BIT(3)) | |
58 | #define BQ2415X_RESET_CURRENT (BIT(0)|BIT(3)|BIT(7)) | |
59 | ||
60 | /* status register */ | |
61 | #define BQ2415X_BIT_TMR_RST 7 | |
62 | #define BQ2415X_BIT_OTG 7 | |
63 | #define BQ2415X_BIT_EN_STAT 6 | |
64 | #define BQ2415X_MASK_STAT (BIT(4)|BIT(5)) | |
65 | #define BQ2415X_SHIFT_STAT 4 | |
66 | #define BQ2415X_BIT_BOOST 3 | |
67 | #define BQ2415X_MASK_FAULT (BIT(0)|BIT(1)|BIT(2)) | |
68 | #define BQ2415X_SHIFT_FAULT 0 | |
69 | ||
70 | /* control register */ | |
71 | #define BQ2415X_MASK_LIMIT (BIT(6)|BIT(7)) | |
72 | #define BQ2415X_SHIFT_LIMIT 6 | |
73 | #define BQ2415X_MASK_VLOWV (BIT(4)|BIT(5)) | |
74 | #define BQ2415X_SHIFT_VLOWV 4 | |
75 | #define BQ2415X_BIT_TE 3 | |
76 | #define BQ2415X_BIT_CE 2 | |
77 | #define BQ2415X_BIT_HZ_MODE 1 | |
78 | #define BQ2415X_BIT_OPA_MODE 0 | |
79 | ||
80 | /* voltage register */ | |
81 | #define BQ2415X_MASK_VO (BIT(2)|BIT(3)|BIT(4)|BIT(5)|BIT(6)|BIT(7)) | |
82 | #define BQ2415X_SHIFT_VO 2 | |
83 | #define BQ2415X_BIT_OTG_PL 1 | |
84 | #define BQ2415X_BIT_OTG_EN 0 | |
85 | ||
86 | /* vender register */ | |
87 | #define BQ2415X_MASK_VENDER (BIT(5)|BIT(6)|BIT(7)) | |
88 | #define BQ2415X_SHIFT_VENDER 5 | |
89 | #define BQ2415X_MASK_PN (BIT(3)|BIT(4)) | |
90 | #define BQ2415X_SHIFT_PN 3 | |
91 | #define BQ2415X_MASK_REVISION (BIT(0)|BIT(1)|BIT(2)) | |
92 | #define BQ2415X_SHIFT_REVISION 0 | |
93 | ||
94 | /* current register */ | |
95 | #define BQ2415X_MASK_RESET BIT(7) | |
96 | #define BQ2415X_MASK_VI_CHRG (BIT(4)|BIT(5)|BIT(6)) | |
97 | #define BQ2415X_SHIFT_VI_CHRG 4 | |
98 | /* N/A BIT(3) */ | |
99 | #define BQ2415X_MASK_VI_TERM (BIT(0)|BIT(1)|BIT(2)) | |
100 | #define BQ2415X_SHIFT_VI_TERM 0 | |
101 | ||
102 | ||
103 | enum bq2415x_command { | |
104 | BQ2415X_TIMER_RESET, | |
105 | BQ2415X_OTG_STATUS, | |
106 | BQ2415X_STAT_PIN_STATUS, | |
107 | BQ2415X_STAT_PIN_ENABLE, | |
108 | BQ2415X_STAT_PIN_DISABLE, | |
109 | BQ2415X_CHARGE_STATUS, | |
110 | BQ2415X_BOOST_STATUS, | |
111 | BQ2415X_FAULT_STATUS, | |
112 | ||
113 | BQ2415X_CHARGE_TERMINATION_STATUS, | |
114 | BQ2415X_CHARGE_TERMINATION_ENABLE, | |
115 | BQ2415X_CHARGE_TERMINATION_DISABLE, | |
116 | BQ2415X_CHARGER_STATUS, | |
117 | BQ2415X_CHARGER_ENABLE, | |
118 | BQ2415X_CHARGER_DISABLE, | |
119 | BQ2415X_HIGH_IMPEDANCE_STATUS, | |
120 | BQ2415X_HIGH_IMPEDANCE_ENABLE, | |
121 | BQ2415X_HIGH_IMPEDANCE_DISABLE, | |
122 | BQ2415X_BOOST_MODE_STATUS, | |
123 | BQ2415X_BOOST_MODE_ENABLE, | |
124 | BQ2415X_BOOST_MODE_DISABLE, | |
125 | ||
126 | BQ2415X_OTG_LEVEL, | |
127 | BQ2415X_OTG_ACTIVATE_HIGH, | |
128 | BQ2415X_OTG_ACTIVATE_LOW, | |
129 | BQ2415X_OTG_PIN_STATUS, | |
130 | BQ2415X_OTG_PIN_ENABLE, | |
131 | BQ2415X_OTG_PIN_DISABLE, | |
132 | ||
133 | BQ2415X_VENDER_CODE, | |
134 | BQ2415X_PART_NUMBER, | |
135 | BQ2415X_REVISION, | |
136 | }; | |
137 | ||
138 | enum bq2415x_chip { | |
139 | BQUNKNOWN, | |
140 | BQ24150, | |
141 | BQ24150A, | |
142 | BQ24151, | |
143 | BQ24151A, | |
144 | BQ24152, | |
145 | BQ24153, | |
146 | BQ24153A, | |
147 | BQ24155, | |
148 | BQ24156, | |
149 | BQ24156A, | |
150 | BQ24158, | |
151 | }; | |
152 | ||
153 | static char *bq2415x_chip_name[] = { | |
154 | "unknown", | |
155 | "bq24150", | |
156 | "bq24150a", | |
157 | "bq24151", | |
158 | "bq24151a", | |
159 | "bq24152", | |
160 | "bq24153", | |
161 | "bq24153a", | |
162 | "bq24155", | |
163 | "bq24156", | |
164 | "bq24156a", | |
165 | "bq24158", | |
166 | }; | |
167 | ||
168 | struct bq2415x_device { | |
169 | struct device *dev; | |
170 | struct bq2415x_platform_data init_data; | |
171 | struct power_supply charger; | |
172 | struct delayed_work work; | |
faffd234 | 173 | struct power_supply *notify_psy; |
32260308 | 174 | struct notifier_block nb; |
0bc98cc6 PR |
175 | enum bq2415x_mode reported_mode;/* mode reported by hook function */ |
176 | enum bq2415x_mode mode; /* current configured mode */ | |
177 | enum bq2415x_chip chip; | |
178 | const char *timer_error; | |
179 | char *model; | |
180 | char *name; | |
181 | int autotimer; /* 1 - if driver automatically reset timer, 0 - not */ | |
182 | int automode; /* 1 - enabled, 0 - disabled; -1 - not supported */ | |
183 | int id; | |
184 | }; | |
185 | ||
186 | /* each registered chip must have unique id */ | |
187 | static DEFINE_IDR(bq2415x_id); | |
188 | ||
189 | static DEFINE_MUTEX(bq2415x_id_mutex); | |
190 | static DEFINE_MUTEX(bq2415x_timer_mutex); | |
191 | static DEFINE_MUTEX(bq2415x_i2c_mutex); | |
192 | ||
193 | /**** i2c read functions ****/ | |
194 | ||
195 | /* read value from register */ | |
196 | static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg) | |
197 | { | |
198 | struct i2c_client *client = to_i2c_client(bq->dev); | |
199 | struct i2c_msg msg[2]; | |
200 | u8 val; | |
201 | int ret; | |
202 | ||
203 | if (!client->adapter) | |
204 | return -ENODEV; | |
205 | ||
206 | msg[0].addr = client->addr; | |
207 | msg[0].flags = 0; | |
208 | msg[0].buf = ® | |
209 | msg[0].len = sizeof(reg); | |
210 | msg[1].addr = client->addr; | |
211 | msg[1].flags = I2C_M_RD; | |
212 | msg[1].buf = &val; | |
213 | msg[1].len = sizeof(val); | |
214 | ||
215 | mutex_lock(&bq2415x_i2c_mutex); | |
216 | ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); | |
217 | mutex_unlock(&bq2415x_i2c_mutex); | |
218 | ||
219 | if (ret < 0) | |
220 | return ret; | |
221 | ||
222 | return val; | |
223 | } | |
224 | ||
225 | /* read value from register, apply mask and right shift it */ | |
226 | static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg, | |
6c47a3e0 | 227 | u8 mask, u8 shift) |
0bc98cc6 PR |
228 | { |
229 | int ret; | |
230 | ||
231 | if (shift > 8) | |
232 | return -EINVAL; | |
233 | ||
234 | ret = bq2415x_i2c_read(bq, reg); | |
235 | if (ret < 0) | |
236 | return ret; | |
6c47a3e0 | 237 | return (ret & mask) >> shift; |
0bc98cc6 PR |
238 | } |
239 | ||
240 | /* read value from register and return one specified bit */ | |
241 | static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit) | |
242 | { | |
243 | if (bit > 8) | |
244 | return -EINVAL; | |
6c47a3e0 | 245 | return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit); |
0bc98cc6 PR |
246 | } |
247 | ||
248 | /**** i2c write functions ****/ | |
249 | ||
250 | /* write value to register */ | |
251 | static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val) | |
252 | { | |
253 | struct i2c_client *client = to_i2c_client(bq->dev); | |
254 | struct i2c_msg msg[1]; | |
255 | u8 data[2]; | |
256 | int ret; | |
257 | ||
258 | data[0] = reg; | |
259 | data[1] = val; | |
260 | ||
261 | msg[0].addr = client->addr; | |
262 | msg[0].flags = 0; | |
263 | msg[0].buf = data; | |
264 | msg[0].len = ARRAY_SIZE(data); | |
265 | ||
266 | mutex_lock(&bq2415x_i2c_mutex); | |
267 | ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); | |
268 | mutex_unlock(&bq2415x_i2c_mutex); | |
269 | ||
270 | /* i2c_transfer returns number of messages transferred */ | |
271 | if (ret < 0) | |
272 | return ret; | |
273 | else if (ret != 1) | |
274 | return -EIO; | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | /* read value from register, change it with mask left shifted and write back */ | |
280 | static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val, | |
6c47a3e0 | 281 | u8 mask, u8 shift) |
0bc98cc6 PR |
282 | { |
283 | int ret; | |
284 | ||
285 | if (shift > 8) | |
286 | return -EINVAL; | |
287 | ||
288 | ret = bq2415x_i2c_read(bq, reg); | |
289 | if (ret < 0) | |
290 | return ret; | |
291 | ||
292 | ret &= ~mask; | |
293 | ret |= val << shift; | |
294 | ||
295 | return bq2415x_i2c_write(bq, reg, ret); | |
296 | } | |
297 | ||
298 | /* change only one bit in register */ | |
299 | static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg, | |
6c47a3e0 | 300 | bool val, u8 bit) |
0bc98cc6 PR |
301 | { |
302 | if (bit > 8) | |
303 | return -EINVAL; | |
6c47a3e0 | 304 | return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit); |
0bc98cc6 PR |
305 | } |
306 | ||
307 | /**** global functions ****/ | |
308 | ||
309 | /* exec command function */ | |
310 | static int bq2415x_exec_command(struct bq2415x_device *bq, | |
311 | enum bq2415x_command command) | |
312 | { | |
313 | int ret; | |
6c47a3e0 | 314 | |
0bc98cc6 PR |
315 | switch (command) { |
316 | case BQ2415X_TIMER_RESET: | |
317 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, | |
318 | 1, BQ2415X_BIT_TMR_RST); | |
319 | case BQ2415X_OTG_STATUS: | |
320 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, | |
321 | BQ2415X_BIT_OTG); | |
322 | case BQ2415X_STAT_PIN_STATUS: | |
323 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, | |
324 | BQ2415X_BIT_EN_STAT); | |
325 | case BQ2415X_STAT_PIN_ENABLE: | |
326 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1, | |
327 | BQ2415X_BIT_EN_STAT); | |
328 | case BQ2415X_STAT_PIN_DISABLE: | |
329 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 0, | |
330 | BQ2415X_BIT_EN_STAT); | |
331 | case BQ2415X_CHARGE_STATUS: | |
332 | return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS, | |
333 | BQ2415X_MASK_STAT, BQ2415X_SHIFT_STAT); | |
334 | case BQ2415X_BOOST_STATUS: | |
335 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, | |
336 | BQ2415X_BIT_BOOST); | |
337 | case BQ2415X_FAULT_STATUS: | |
338 | return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS, | |
339 | BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT); | |
340 | ||
341 | case BQ2415X_CHARGE_TERMINATION_STATUS: | |
342 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, | |
343 | BQ2415X_BIT_TE); | |
344 | case BQ2415X_CHARGE_TERMINATION_ENABLE: | |
345 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, | |
346 | 1, BQ2415X_BIT_TE); | |
347 | case BQ2415X_CHARGE_TERMINATION_DISABLE: | |
348 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, | |
349 | 0, BQ2415X_BIT_TE); | |
350 | case BQ2415X_CHARGER_STATUS: | |
351 | ret = bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, | |
352 | BQ2415X_BIT_CE); | |
353 | if (ret < 0) | |
354 | return ret; | |
355 | else | |
356 | return ret > 0 ? 0 : 1; | |
357 | case BQ2415X_CHARGER_ENABLE: | |
358 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, | |
359 | 0, BQ2415X_BIT_CE); | |
360 | case BQ2415X_CHARGER_DISABLE: | |
361 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, | |
362 | 1, BQ2415X_BIT_CE); | |
363 | case BQ2415X_HIGH_IMPEDANCE_STATUS: | |
364 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, | |
365 | BQ2415X_BIT_HZ_MODE); | |
366 | case BQ2415X_HIGH_IMPEDANCE_ENABLE: | |
367 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, | |
368 | 1, BQ2415X_BIT_HZ_MODE); | |
369 | case BQ2415X_HIGH_IMPEDANCE_DISABLE: | |
370 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, | |
371 | 0, BQ2415X_BIT_HZ_MODE); | |
372 | case BQ2415X_BOOST_MODE_STATUS: | |
373 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, | |
374 | BQ2415X_BIT_OPA_MODE); | |
375 | case BQ2415X_BOOST_MODE_ENABLE: | |
376 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, | |
377 | 1, BQ2415X_BIT_OPA_MODE); | |
378 | case BQ2415X_BOOST_MODE_DISABLE: | |
379 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, | |
380 | 0, BQ2415X_BIT_OPA_MODE); | |
381 | ||
382 | case BQ2415X_OTG_LEVEL: | |
383 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE, | |
384 | BQ2415X_BIT_OTG_PL); | |
385 | case BQ2415X_OTG_ACTIVATE_HIGH: | |
386 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, | |
387 | 1, BQ2415X_BIT_OTG_PL); | |
388 | case BQ2415X_OTG_ACTIVATE_LOW: | |
389 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, | |
390 | 0, BQ2415X_BIT_OTG_PL); | |
391 | case BQ2415X_OTG_PIN_STATUS: | |
392 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE, | |
393 | BQ2415X_BIT_OTG_EN); | |
394 | case BQ2415X_OTG_PIN_ENABLE: | |
395 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, | |
396 | 1, BQ2415X_BIT_OTG_EN); | |
397 | case BQ2415X_OTG_PIN_DISABLE: | |
398 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, | |
399 | 0, BQ2415X_BIT_OTG_EN); | |
400 | ||
401 | case BQ2415X_VENDER_CODE: | |
402 | return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, | |
403 | BQ2415X_MASK_VENDER, BQ2415X_SHIFT_VENDER); | |
404 | case BQ2415X_PART_NUMBER: | |
405 | return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, | |
406 | BQ2415X_MASK_PN, BQ2415X_SHIFT_PN); | |
407 | case BQ2415X_REVISION: | |
408 | return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, | |
409 | BQ2415X_MASK_REVISION, BQ2415X_SHIFT_REVISION); | |
0bc98cc6 | 410 | } |
6c47a3e0 | 411 | return -EINVAL; |
0bc98cc6 PR |
412 | } |
413 | ||
414 | /* detect chip type */ | |
415 | static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq) | |
416 | { | |
417 | struct i2c_client *client = to_i2c_client(bq->dev); | |
418 | int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER); | |
419 | ||
420 | if (ret < 0) | |
421 | return ret; | |
422 | ||
423 | switch (client->addr) { | |
424 | case 0x6b: | |
425 | switch (ret) { | |
426 | case 0: | |
427 | if (bq->chip == BQ24151A) | |
428 | return bq->chip; | |
429 | else | |
430 | return BQ24151; | |
431 | case 1: | |
432 | if (bq->chip == BQ24150A || | |
433 | bq->chip == BQ24152 || | |
434 | bq->chip == BQ24155) | |
435 | return bq->chip; | |
436 | else | |
437 | return BQ24150; | |
438 | case 2: | |
439 | if (bq->chip == BQ24153A) | |
440 | return bq->chip; | |
441 | else | |
442 | return BQ24153; | |
443 | default: | |
444 | return BQUNKNOWN; | |
445 | } | |
446 | break; | |
447 | ||
448 | case 0x6a: | |
449 | switch (ret) { | |
450 | case 0: | |
451 | if (bq->chip == BQ24156A) | |
452 | return bq->chip; | |
453 | else | |
454 | return BQ24156; | |
455 | case 2: | |
456 | return BQ24158; | |
457 | default: | |
458 | return BQUNKNOWN; | |
459 | } | |
460 | break; | |
461 | } | |
462 | ||
463 | return BQUNKNOWN; | |
464 | } | |
465 | ||
466 | /* detect chip revision */ | |
467 | static int bq2415x_detect_revision(struct bq2415x_device *bq) | |
468 | { | |
469 | int ret = bq2415x_exec_command(bq, BQ2415X_REVISION); | |
470 | int chip = bq2415x_detect_chip(bq); | |
6c47a3e0 | 471 | |
0bc98cc6 PR |
472 | if (ret < 0 || chip < 0) |
473 | return -1; | |
474 | ||
475 | switch (chip) { | |
476 | case BQ24150: | |
477 | case BQ24150A: | |
478 | case BQ24151: | |
479 | case BQ24151A: | |
480 | case BQ24152: | |
481 | if (ret >= 0 && ret <= 3) | |
482 | return ret; | |
483 | else | |
484 | return -1; | |
0bc98cc6 PR |
485 | case BQ24153: |
486 | case BQ24153A: | |
487 | case BQ24156: | |
488 | case BQ24156A: | |
489 | case BQ24158: | |
490 | if (ret == 3) | |
491 | return 0; | |
492 | else if (ret == 1) | |
493 | return 1; | |
494 | else | |
495 | return -1; | |
0bc98cc6 PR |
496 | case BQ24155: |
497 | if (ret == 3) | |
498 | return 3; | |
499 | else | |
500 | return -1; | |
0bc98cc6 PR |
501 | case BQUNKNOWN: |
502 | return -1; | |
503 | } | |
504 | ||
505 | return -1; | |
506 | } | |
507 | ||
508 | /* return chip vender code */ | |
509 | static int bq2415x_get_vender_code(struct bq2415x_device *bq) | |
510 | { | |
6c47a3e0 AV |
511 | int ret; |
512 | ||
513 | ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE); | |
0bc98cc6 PR |
514 | if (ret < 0) |
515 | return 0; | |
6c47a3e0 AV |
516 | |
517 | /* convert to binary */ | |
518 | return (ret & 0x1) + | |
519 | ((ret >> 1) & 0x1) * 10 + | |
520 | ((ret >> 2) & 0x1) * 100; | |
0bc98cc6 PR |
521 | } |
522 | ||
523 | /* reset all chip registers to default state */ | |
524 | static void bq2415x_reset_chip(struct bq2415x_device *bq) | |
525 | { | |
526 | bq2415x_i2c_write(bq, BQ2415X_REG_CURRENT, BQ2415X_RESET_CURRENT); | |
527 | bq2415x_i2c_write(bq, BQ2415X_REG_VOLTAGE, BQ2415X_RESET_VOLTAGE); | |
528 | bq2415x_i2c_write(bq, BQ2415X_REG_CONTROL, BQ2415X_RESET_CONTROL); | |
529 | bq2415x_i2c_write(bq, BQ2415X_REG_STATUS, BQ2415X_RESET_STATUS); | |
530 | bq->timer_error = NULL; | |
531 | } | |
532 | ||
533 | /**** properties functions ****/ | |
534 | ||
535 | /* set current limit in mA */ | |
536 | static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA) | |
537 | { | |
538 | int val; | |
6c47a3e0 | 539 | |
0bc98cc6 PR |
540 | if (mA <= 100) |
541 | val = 0; | |
542 | else if (mA <= 500) | |
543 | val = 1; | |
544 | else if (mA <= 800) | |
545 | val = 2; | |
546 | else | |
547 | val = 3; | |
6c47a3e0 | 548 | |
0bc98cc6 PR |
549 | return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val, |
550 | BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT); | |
551 | } | |
552 | ||
553 | /* get current limit in mA */ | |
554 | static int bq2415x_get_current_limit(struct bq2415x_device *bq) | |
555 | { | |
6c47a3e0 AV |
556 | int ret; |
557 | ||
558 | ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL, | |
0bc98cc6 PR |
559 | BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT); |
560 | if (ret < 0) | |
561 | return ret; | |
562 | else if (ret == 0) | |
563 | return 100; | |
564 | else if (ret == 1) | |
565 | return 500; | |
566 | else if (ret == 2) | |
567 | return 800; | |
568 | else if (ret == 3) | |
569 | return 1800; | |
6c47a3e0 | 570 | return -EINVAL; |
0bc98cc6 PR |
571 | } |
572 | ||
573 | /* set weak battery voltage in mV */ | |
574 | static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV) | |
575 | { | |
0bc98cc6 | 576 | int val; |
6c47a3e0 AV |
577 | |
578 | /* round to 100mV */ | |
0bc98cc6 PR |
579 | if (mV <= 3400 + 50) |
580 | val = 0; | |
581 | else if (mV <= 3500 + 50) | |
582 | val = 1; | |
583 | else if (mV <= 3600 + 50) | |
584 | val = 2; | |
585 | else | |
586 | val = 3; | |
6c47a3e0 | 587 | |
0bc98cc6 PR |
588 | return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val, |
589 | BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV); | |
590 | } | |
591 | ||
592 | /* get weak battery voltage in mV */ | |
593 | static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq) | |
594 | { | |
6c47a3e0 AV |
595 | int ret; |
596 | ||
597 | ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL, | |
0bc98cc6 PR |
598 | BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV); |
599 | if (ret < 0) | |
600 | return ret; | |
6c47a3e0 | 601 | return 100 * (34 + ret); |
0bc98cc6 PR |
602 | } |
603 | ||
604 | /* set battery regulation voltage in mV */ | |
605 | static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq, | |
6c47a3e0 | 606 | int mV) |
0bc98cc6 PR |
607 | { |
608 | int val = (mV/10 - 350) / 2; | |
609 | ||
3ed5cd79 AB |
610 | /* |
611 | * According to datasheet, maximum battery regulation voltage is | |
612 | * 4440mV which is b101111 = 47. | |
613 | */ | |
0bc98cc6 PR |
614 | if (val < 0) |
615 | val = 0; | |
3ed5cd79 | 616 | else if (val > 47) |
0bc98cc6 PR |
617 | return -EINVAL; |
618 | ||
619 | return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val, | |
620 | BQ2415X_MASK_VO, BQ2415X_SHIFT_VO); | |
621 | } | |
622 | ||
623 | /* get battery regulation voltage in mV */ | |
624 | static int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq) | |
625 | { | |
626 | int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE, | |
627 | BQ2415X_MASK_VO, BQ2415X_SHIFT_VO); | |
6c47a3e0 | 628 | |
0bc98cc6 PR |
629 | if (ret < 0) |
630 | return ret; | |
6c47a3e0 | 631 | return 10 * (350 + 2*ret); |
0bc98cc6 PR |
632 | } |
633 | ||
634 | /* set charge current in mA (platform data must provide resistor sense) */ | |
635 | static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA) | |
636 | { | |
637 | int val; | |
6c47a3e0 | 638 | |
0bc98cc6 PR |
639 | if (bq->init_data.resistor_sense <= 0) |
640 | return -ENOSYS; | |
641 | ||
642 | val = (mA * bq->init_data.resistor_sense - 37400) / 6800; | |
0bc98cc6 PR |
643 | if (val < 0) |
644 | val = 0; | |
645 | else if (val > 7) | |
646 | val = 7; | |
647 | ||
648 | return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val, | |
649 | BQ2415X_MASK_VI_CHRG | BQ2415X_MASK_RESET, | |
650 | BQ2415X_SHIFT_VI_CHRG); | |
651 | } | |
652 | ||
653 | /* get charge current in mA (platform data must provide resistor sense) */ | |
654 | static int bq2415x_get_charge_current(struct bq2415x_device *bq) | |
655 | { | |
656 | int ret; | |
6c47a3e0 | 657 | |
0bc98cc6 PR |
658 | if (bq->init_data.resistor_sense <= 0) |
659 | return -ENOSYS; | |
660 | ||
661 | ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT, | |
662 | BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG); | |
663 | if (ret < 0) | |
664 | return ret; | |
6c47a3e0 | 665 | return (37400 + 6800*ret) / bq->init_data.resistor_sense; |
0bc98cc6 PR |
666 | } |
667 | ||
668 | /* set termination current in mA (platform data must provide resistor sense) */ | |
669 | static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA) | |
670 | { | |
671 | int val; | |
6c47a3e0 | 672 | |
0bc98cc6 PR |
673 | if (bq->init_data.resistor_sense <= 0) |
674 | return -ENOSYS; | |
675 | ||
676 | val = (mA * bq->init_data.resistor_sense - 3400) / 3400; | |
0bc98cc6 PR |
677 | if (val < 0) |
678 | val = 0; | |
679 | else if (val > 7) | |
680 | val = 7; | |
681 | ||
682 | return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val, | |
683 | BQ2415X_MASK_VI_TERM | BQ2415X_MASK_RESET, | |
684 | BQ2415X_SHIFT_VI_TERM); | |
685 | } | |
686 | ||
687 | /* get termination current in mA (platform data must provide resistor sense) */ | |
688 | static int bq2415x_get_termination_current(struct bq2415x_device *bq) | |
689 | { | |
690 | int ret; | |
6c47a3e0 | 691 | |
0bc98cc6 PR |
692 | if (bq->init_data.resistor_sense <= 0) |
693 | return -ENOSYS; | |
694 | ||
695 | ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT, | |
696 | BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM); | |
697 | if (ret < 0) | |
698 | return ret; | |
6c47a3e0 | 699 | return (3400 + 3400*ret) / bq->init_data.resistor_sense; |
0bc98cc6 PR |
700 | } |
701 | ||
702 | /* set default value of property */ | |
703 | #define bq2415x_set_default_value(bq, prop) \ | |
704 | do { \ | |
705 | int ret = 0; \ | |
706 | if (bq->init_data.prop != -1) \ | |
707 | ret = bq2415x_set_##prop(bq, bq->init_data.prop); \ | |
708 | if (ret < 0) \ | |
709 | return ret; \ | |
710 | } while (0) | |
711 | ||
712 | /* set default values of all properties */ | |
713 | static int bq2415x_set_defaults(struct bq2415x_device *bq) | |
714 | { | |
715 | bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE); | |
716 | bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE); | |
717 | bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_DISABLE); | |
6c47a3e0 | 718 | |
0bc98cc6 PR |
719 | bq2415x_set_default_value(bq, current_limit); |
720 | bq2415x_set_default_value(bq, weak_battery_voltage); | |
721 | bq2415x_set_default_value(bq, battery_regulation_voltage); | |
6c47a3e0 | 722 | |
0bc98cc6 PR |
723 | if (bq->init_data.resistor_sense > 0) { |
724 | bq2415x_set_default_value(bq, charge_current); | |
725 | bq2415x_set_default_value(bq, termination_current); | |
726 | bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_ENABLE); | |
727 | } | |
6c47a3e0 | 728 | |
0bc98cc6 PR |
729 | bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE); |
730 | return 0; | |
731 | } | |
732 | ||
733 | /**** charger mode functions ****/ | |
734 | ||
735 | /* set charger mode */ | |
736 | static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode) | |
737 | { | |
738 | int ret = 0; | |
739 | int charger = 0; | |
740 | int boost = 0; | |
741 | ||
0bc98cc6 PR |
742 | if (mode == BQ2415X_MODE_BOOST) |
743 | boost = 1; | |
ac6324e7 PR |
744 | else if (mode != BQ2415X_MODE_OFF) |
745 | charger = 1; | |
0bc98cc6 PR |
746 | |
747 | if (!charger) | |
748 | ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE); | |
749 | ||
750 | if (!boost) | |
751 | ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE); | |
752 | ||
753 | if (ret < 0) | |
754 | return ret; | |
755 | ||
756 | switch (mode) { | |
ac6324e7 PR |
757 | case BQ2415X_MODE_OFF: |
758 | dev_dbg(bq->dev, "changing mode to: Offline\n"); | |
759 | ret = bq2415x_set_current_limit(bq, 100); | |
760 | break; | |
0bc98cc6 PR |
761 | case BQ2415X_MODE_NONE: |
762 | dev_dbg(bq->dev, "changing mode to: N/A\n"); | |
763 | ret = bq2415x_set_current_limit(bq, 100); | |
764 | break; | |
765 | case BQ2415X_MODE_HOST_CHARGER: | |
766 | dev_dbg(bq->dev, "changing mode to: Host/HUB charger\n"); | |
767 | ret = bq2415x_set_current_limit(bq, 500); | |
768 | break; | |
769 | case BQ2415X_MODE_DEDICATED_CHARGER: | |
770 | dev_dbg(bq->dev, "changing mode to: Dedicated charger\n"); | |
771 | ret = bq2415x_set_current_limit(bq, 1800); | |
772 | break; | |
773 | case BQ2415X_MODE_BOOST: /* Boost mode */ | |
774 | dev_dbg(bq->dev, "changing mode to: Boost\n"); | |
775 | ret = bq2415x_set_current_limit(bq, 100); | |
776 | break; | |
777 | } | |
778 | ||
779 | if (ret < 0) | |
780 | return ret; | |
781 | ||
782 | if (charger) | |
783 | ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE); | |
784 | else if (boost) | |
785 | ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_ENABLE); | |
786 | ||
787 | if (ret < 0) | |
788 | return ret; | |
789 | ||
790 | bq2415x_set_default_value(bq, weak_battery_voltage); | |
791 | bq2415x_set_default_value(bq, battery_regulation_voltage); | |
792 | ||
793 | bq->mode = mode; | |
794 | sysfs_notify(&bq->charger.dev->kobj, NULL, "mode"); | |
795 | ||
796 | return 0; | |
797 | ||
798 | } | |
799 | ||
32260308 PR |
800 | static int bq2415x_notifier_call(struct notifier_block *nb, |
801 | unsigned long val, void *v) | |
0bc98cc6 | 802 | { |
32260308 PR |
803 | struct bq2415x_device *bq = |
804 | container_of(nb, struct bq2415x_device, nb); | |
805 | struct power_supply *psy = v; | |
806 | enum bq2415x_mode mode; | |
807 | union power_supply_propval prop; | |
808 | int ret; | |
809 | int mA; | |
0bc98cc6 | 810 | |
32260308 PR |
811 | if (val != PSY_EVENT_PROP_CHANGED) |
812 | return NOTIFY_OK; | |
813 | ||
faffd234 | 814 | if (psy != bq->notify_psy) |
32260308 PR |
815 | return NOTIFY_OK; |
816 | ||
817 | dev_dbg(bq->dev, "notifier call was called\n"); | |
818 | ||
819 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_CURRENT_MAX, &prop); | |
820 | if (ret != 0) | |
821 | return NOTIFY_OK; | |
822 | ||
823 | mA = prop.intval; | |
824 | ||
825 | if (mA == 0) | |
826 | mode = BQ2415X_MODE_OFF; | |
827 | else if (mA < 500) | |
828 | mode = BQ2415X_MODE_NONE; | |
829 | else if (mA < 1800) | |
830 | mode = BQ2415X_MODE_HOST_CHARGER; | |
831 | else | |
832 | mode = BQ2415X_MODE_DEDICATED_CHARGER; | |
833 | ||
834 | if (bq->reported_mode == mode) | |
835 | return NOTIFY_OK; | |
0bc98cc6 | 836 | |
0bc98cc6 PR |
837 | bq->reported_mode = mode; |
838 | ||
839 | /* if automode is not enabled do not tell about reported_mode */ | |
840 | if (bq->automode < 1) | |
32260308 | 841 | return NOTIFY_OK; |
0bc98cc6 PR |
842 | |
843 | sysfs_notify(&bq->charger.dev->kobj, NULL, "reported_mode"); | |
844 | bq2415x_set_mode(bq, bq->reported_mode); | |
845 | ||
32260308 | 846 | return NOTIFY_OK; |
0bc98cc6 PR |
847 | } |
848 | ||
849 | /**** timer functions ****/ | |
850 | ||
851 | /* enable/disable auto resetting chip timer */ | |
852 | static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state) | |
853 | { | |
854 | mutex_lock(&bq2415x_timer_mutex); | |
855 | ||
856 | if (bq->autotimer == state) { | |
857 | mutex_unlock(&bq2415x_timer_mutex); | |
858 | return; | |
859 | } | |
860 | ||
861 | bq->autotimer = state; | |
862 | ||
863 | if (state) { | |
864 | schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ); | |
865 | bq2415x_exec_command(bq, BQ2415X_TIMER_RESET); | |
866 | bq->timer_error = NULL; | |
867 | } else { | |
868 | cancel_delayed_work_sync(&bq->work); | |
869 | } | |
870 | ||
871 | mutex_unlock(&bq2415x_timer_mutex); | |
872 | } | |
873 | ||
874 | /* called by bq2415x_timer_work on timer error */ | |
875 | static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg) | |
876 | { | |
877 | bq->timer_error = msg; | |
878 | sysfs_notify(&bq->charger.dev->kobj, NULL, "timer"); | |
879 | dev_err(bq->dev, "%s\n", msg); | |
880 | if (bq->automode > 0) | |
881 | bq->automode = 0; | |
ac6324e7 | 882 | bq2415x_set_mode(bq, BQ2415X_MODE_OFF); |
0bc98cc6 PR |
883 | bq2415x_set_autotimer(bq, 0); |
884 | } | |
885 | ||
886 | /* delayed work function for auto resetting chip timer */ | |
887 | static void bq2415x_timer_work(struct work_struct *work) | |
888 | { | |
889 | struct bq2415x_device *bq = container_of(work, struct bq2415x_device, | |
6c47a3e0 AV |
890 | work.work); |
891 | int ret; | |
892 | int error; | |
893 | int boost; | |
0bc98cc6 PR |
894 | |
895 | if (!bq->autotimer) | |
896 | return; | |
897 | ||
898 | ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET); | |
899 | if (ret < 0) { | |
900 | bq2415x_timer_error(bq, "Resetting timer failed"); | |
901 | return; | |
902 | } | |
903 | ||
904 | boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS); | |
905 | if (boost < 0) { | |
906 | bq2415x_timer_error(bq, "Unknown error"); | |
907 | return; | |
908 | } | |
909 | ||
910 | error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS); | |
911 | if (error < 0) { | |
912 | bq2415x_timer_error(bq, "Unknown error"); | |
913 | return; | |
914 | } | |
915 | ||
916 | if (boost) { | |
917 | switch (error) { | |
918 | /* Non fatal errors, chip is OK */ | |
919 | case 0: /* No error */ | |
920 | break; | |
921 | case 6: /* Timer expired */ | |
922 | dev_err(bq->dev, "Timer expired\n"); | |
923 | break; | |
924 | case 3: /* Battery voltage too low */ | |
925 | dev_err(bq->dev, "Battery voltage to low\n"); | |
926 | break; | |
927 | ||
928 | /* Fatal errors, disable and reset chip */ | |
929 | case 1: /* Overvoltage protection (chip fried) */ | |
930 | bq2415x_timer_error(bq, | |
931 | "Overvoltage protection (chip fried)"); | |
932 | return; | |
933 | case 2: /* Overload */ | |
934 | bq2415x_timer_error(bq, "Overload"); | |
935 | return; | |
936 | case 4: /* Battery overvoltage protection */ | |
937 | bq2415x_timer_error(bq, | |
938 | "Battery overvoltage protection"); | |
939 | return; | |
940 | case 5: /* Thermal shutdown (too hot) */ | |
941 | bq2415x_timer_error(bq, | |
942 | "Thermal shutdown (too hot)"); | |
943 | return; | |
944 | case 7: /* N/A */ | |
945 | bq2415x_timer_error(bq, "Unknown error"); | |
946 | return; | |
947 | } | |
948 | } else { | |
949 | switch (error) { | |
950 | /* Non fatal errors, chip is OK */ | |
951 | case 0: /* No error */ | |
952 | break; | |
953 | case 2: /* Sleep mode */ | |
954 | dev_err(bq->dev, "Sleep mode\n"); | |
955 | break; | |
956 | case 3: /* Poor input source */ | |
957 | dev_err(bq->dev, "Poor input source\n"); | |
958 | break; | |
959 | case 6: /* Timer expired */ | |
960 | dev_err(bq->dev, "Timer expired\n"); | |
961 | break; | |
962 | case 7: /* No battery */ | |
963 | dev_err(bq->dev, "No battery\n"); | |
964 | break; | |
965 | ||
966 | /* Fatal errors, disable and reset chip */ | |
967 | case 1: /* Overvoltage protection (chip fried) */ | |
968 | bq2415x_timer_error(bq, | |
969 | "Overvoltage protection (chip fried)"); | |
970 | return; | |
971 | case 4: /* Battery overvoltage protection */ | |
972 | bq2415x_timer_error(bq, | |
973 | "Battery overvoltage protection"); | |
974 | return; | |
975 | case 5: /* Thermal shutdown (too hot) */ | |
976 | bq2415x_timer_error(bq, | |
977 | "Thermal shutdown (too hot)"); | |
978 | return; | |
979 | } | |
980 | } | |
981 | ||
982 | schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ); | |
983 | } | |
984 | ||
985 | /**** power supply interface code ****/ | |
986 | ||
987 | static enum power_supply_property bq2415x_power_supply_props[] = { | |
988 | /* TODO: maybe add more power supply properties */ | |
989 | POWER_SUPPLY_PROP_STATUS, | |
990 | POWER_SUPPLY_PROP_MODEL_NAME, | |
991 | }; | |
992 | ||
993 | static int bq2415x_power_supply_get_property(struct power_supply *psy, | |
6c47a3e0 AV |
994 | enum power_supply_property psp, |
995 | union power_supply_propval *val) | |
0bc98cc6 PR |
996 | { |
997 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, | |
6c47a3e0 | 998 | charger); |
0bc98cc6 PR |
999 | int ret; |
1000 | ||
1001 | switch (psp) { | |
1002 | case POWER_SUPPLY_PROP_STATUS: | |
1003 | ret = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS); | |
1004 | if (ret < 0) | |
1005 | return ret; | |
1006 | else if (ret == 0) /* Ready */ | |
1007 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
1008 | else if (ret == 1) /* Charge in progress */ | |
1009 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
1010 | else if (ret == 2) /* Charge done */ | |
1011 | val->intval = POWER_SUPPLY_STATUS_FULL; | |
1012 | else | |
1013 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
1014 | break; | |
1015 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
1016 | val->strval = bq->model; | |
1017 | break; | |
1018 | default: | |
1019 | return -EINVAL; | |
1020 | } | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | static int bq2415x_power_supply_init(struct bq2415x_device *bq) | |
1025 | { | |
1026 | int ret; | |
1027 | int chip; | |
1028 | char revstr[8]; | |
1029 | ||
1030 | bq->charger.name = bq->name; | |
1031 | bq->charger.type = POWER_SUPPLY_TYPE_USB; | |
1032 | bq->charger.properties = bq2415x_power_supply_props; | |
1033 | bq->charger.num_properties = ARRAY_SIZE(bq2415x_power_supply_props); | |
1034 | bq->charger.get_property = bq2415x_power_supply_get_property; | |
1035 | ||
1036 | ret = bq2415x_detect_chip(bq); | |
1037 | if (ret < 0) | |
1038 | chip = BQUNKNOWN; | |
1039 | else | |
1040 | chip = ret; | |
1041 | ||
1042 | ret = bq2415x_detect_revision(bq); | |
1043 | if (ret < 0) | |
1044 | strcpy(revstr, "unknown"); | |
1045 | else | |
1046 | sprintf(revstr, "1.%d", ret); | |
1047 | ||
1048 | bq->model = kasprintf(GFP_KERNEL, | |
1049 | "chip %s, revision %s, vender code %.3d", | |
1050 | bq2415x_chip_name[chip], revstr, | |
1051 | bq2415x_get_vender_code(bq)); | |
1052 | if (!bq->model) { | |
1053 | dev_err(bq->dev, "failed to allocate model name\n"); | |
1054 | return -ENOMEM; | |
1055 | } | |
1056 | ||
1057 | ret = power_supply_register(bq->dev, &bq->charger); | |
1058 | if (ret) { | |
1059 | kfree(bq->model); | |
1060 | return ret; | |
1061 | } | |
1062 | ||
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | static void bq2415x_power_supply_exit(struct bq2415x_device *bq) | |
1067 | { | |
1068 | bq->autotimer = 0; | |
1069 | if (bq->automode > 0) | |
1070 | bq->automode = 0; | |
1071 | cancel_delayed_work_sync(&bq->work); | |
1072 | power_supply_unregister(&bq->charger); | |
1073 | kfree(bq->model); | |
1074 | } | |
1075 | ||
1076 | /**** additional sysfs entries for power supply interface ****/ | |
1077 | ||
1078 | /* show *_status entries */ | |
1079 | static ssize_t bq2415x_sysfs_show_status(struct device *dev, | |
6c47a3e0 AV |
1080 | struct device_attribute *attr, |
1081 | char *buf) | |
0bc98cc6 PR |
1082 | { |
1083 | struct power_supply *psy = dev_get_drvdata(dev); | |
1084 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, | |
1085 | charger); | |
1086 | enum bq2415x_command command; | |
1087 | int ret; | |
1088 | ||
1089 | if (strcmp(attr->attr.name, "otg_status") == 0) | |
1090 | command = BQ2415X_OTG_STATUS; | |
1091 | else if (strcmp(attr->attr.name, "charge_status") == 0) | |
1092 | command = BQ2415X_CHARGE_STATUS; | |
1093 | else if (strcmp(attr->attr.name, "boost_status") == 0) | |
1094 | command = BQ2415X_BOOST_STATUS; | |
1095 | else if (strcmp(attr->attr.name, "fault_status") == 0) | |
1096 | command = BQ2415X_FAULT_STATUS; | |
1097 | else | |
1098 | return -EINVAL; | |
1099 | ||
1100 | ret = bq2415x_exec_command(bq, command); | |
1101 | if (ret < 0) | |
1102 | return ret; | |
6c47a3e0 | 1103 | return sprintf(buf, "%d\n", ret); |
0bc98cc6 PR |
1104 | } |
1105 | ||
6c47a3e0 AV |
1106 | /* |
1107 | * set timer entry: | |
1108 | * auto - enable auto mode | |
1109 | * off - disable auto mode | |
1110 | * (other values) - reset chip timer | |
1111 | */ | |
0bc98cc6 | 1112 | static ssize_t bq2415x_sysfs_set_timer(struct device *dev, |
6c47a3e0 AV |
1113 | struct device_attribute *attr, |
1114 | const char *buf, | |
1115 | size_t count) | |
0bc98cc6 PR |
1116 | { |
1117 | struct power_supply *psy = dev_get_drvdata(dev); | |
1118 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, | |
1119 | charger); | |
1120 | int ret = 0; | |
1121 | ||
1122 | if (strncmp(buf, "auto", 4) == 0) | |
1123 | bq2415x_set_autotimer(bq, 1); | |
1124 | else if (strncmp(buf, "off", 3) == 0) | |
1125 | bq2415x_set_autotimer(bq, 0); | |
1126 | else | |
1127 | ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET); | |
1128 | ||
1129 | if (ret < 0) | |
1130 | return ret; | |
6c47a3e0 | 1131 | return count; |
0bc98cc6 PR |
1132 | } |
1133 | ||
1134 | /* show timer entry (auto or off) */ | |
1135 | static ssize_t bq2415x_sysfs_show_timer(struct device *dev, | |
6c47a3e0 AV |
1136 | struct device_attribute *attr, |
1137 | char *buf) | |
0bc98cc6 PR |
1138 | { |
1139 | struct power_supply *psy = dev_get_drvdata(dev); | |
1140 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, | |
6c47a3e0 | 1141 | charger); |
0bc98cc6 PR |
1142 | |
1143 | if (bq->timer_error) | |
1144 | return sprintf(buf, "%s\n", bq->timer_error); | |
1145 | ||
1146 | if (bq->autotimer) | |
1147 | return sprintf(buf, "auto\n"); | |
6c47a3e0 | 1148 | return sprintf(buf, "off\n"); |
0bc98cc6 PR |
1149 | } |
1150 | ||
6c47a3e0 AV |
1151 | /* |
1152 | * set mode entry: | |
1153 | * auto - if automode is supported, enable it and set mode to reported | |
1154 | * none - disable charger and boost mode | |
1155 | * host - charging mode for host/hub chargers (current limit 500mA) | |
1156 | * dedicated - charging mode for dedicated chargers (unlimited current limit) | |
1157 | * boost - disable charger and enable boost mode | |
1158 | */ | |
0bc98cc6 | 1159 | static ssize_t bq2415x_sysfs_set_mode(struct device *dev, |
6c47a3e0 AV |
1160 | struct device_attribute *attr, |
1161 | const char *buf, | |
1162 | size_t count) | |
0bc98cc6 PR |
1163 | { |
1164 | struct power_supply *psy = dev_get_drvdata(dev); | |
1165 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, | |
6c47a3e0 | 1166 | charger); |
0bc98cc6 PR |
1167 | enum bq2415x_mode mode; |
1168 | int ret = 0; | |
1169 | ||
1170 | if (strncmp(buf, "auto", 4) == 0) { | |
1171 | if (bq->automode < 0) | |
1172 | return -ENOSYS; | |
1173 | bq->automode = 1; | |
1174 | mode = bq->reported_mode; | |
ac6324e7 PR |
1175 | } else if (strncmp(buf, "off", 3) == 0) { |
1176 | if (bq->automode > 0) | |
1177 | bq->automode = 0; | |
1178 | mode = BQ2415X_MODE_OFF; | |
0bc98cc6 PR |
1179 | } else if (strncmp(buf, "none", 4) == 0) { |
1180 | if (bq->automode > 0) | |
1181 | bq->automode = 0; | |
1182 | mode = BQ2415X_MODE_NONE; | |
1183 | } else if (strncmp(buf, "host", 4) == 0) { | |
1184 | if (bq->automode > 0) | |
1185 | bq->automode = 0; | |
1186 | mode = BQ2415X_MODE_HOST_CHARGER; | |
1187 | } else if (strncmp(buf, "dedicated", 9) == 0) { | |
1188 | if (bq->automode > 0) | |
1189 | bq->automode = 0; | |
1190 | mode = BQ2415X_MODE_DEDICATED_CHARGER; | |
1191 | } else if (strncmp(buf, "boost", 5) == 0) { | |
1192 | if (bq->automode > 0) | |
1193 | bq->automode = 0; | |
1194 | mode = BQ2415X_MODE_BOOST; | |
1195 | } else if (strncmp(buf, "reset", 5) == 0) { | |
1196 | bq2415x_reset_chip(bq); | |
1197 | bq2415x_set_defaults(bq); | |
1198 | if (bq->automode <= 0) | |
1199 | return count; | |
1200 | bq->automode = 1; | |
1201 | mode = bq->reported_mode; | |
6c47a3e0 | 1202 | } else { |
0bc98cc6 | 1203 | return -EINVAL; |
6c47a3e0 | 1204 | } |
0bc98cc6 PR |
1205 | |
1206 | ret = bq2415x_set_mode(bq, mode); | |
1207 | if (ret < 0) | |
1208 | return ret; | |
6c47a3e0 | 1209 | return count; |
0bc98cc6 PR |
1210 | } |
1211 | ||
1212 | /* show mode entry (auto, none, host, dedicated or boost) */ | |
1213 | static ssize_t bq2415x_sysfs_show_mode(struct device *dev, | |
6c47a3e0 AV |
1214 | struct device_attribute *attr, |
1215 | char *buf) | |
0bc98cc6 PR |
1216 | { |
1217 | struct power_supply *psy = dev_get_drvdata(dev); | |
1218 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, | |
1219 | charger); | |
1220 | ssize_t ret = 0; | |
1221 | ||
1222 | if (bq->automode > 0) | |
1223 | ret += sprintf(buf+ret, "auto ("); | |
1224 | ||
1225 | switch (bq->mode) { | |
ac6324e7 PR |
1226 | case BQ2415X_MODE_OFF: |
1227 | ret += sprintf(buf+ret, "off"); | |
1228 | break; | |
0bc98cc6 PR |
1229 | case BQ2415X_MODE_NONE: |
1230 | ret += sprintf(buf+ret, "none"); | |
1231 | break; | |
1232 | case BQ2415X_MODE_HOST_CHARGER: | |
1233 | ret += sprintf(buf+ret, "host"); | |
1234 | break; | |
1235 | case BQ2415X_MODE_DEDICATED_CHARGER: | |
1236 | ret += sprintf(buf+ret, "dedicated"); | |
1237 | break; | |
1238 | case BQ2415X_MODE_BOOST: | |
1239 | ret += sprintf(buf+ret, "boost"); | |
1240 | break; | |
1241 | } | |
1242 | ||
1243 | if (bq->automode > 0) | |
1244 | ret += sprintf(buf+ret, ")"); | |
1245 | ||
1246 | ret += sprintf(buf+ret, "\n"); | |
1247 | return ret; | |
1248 | } | |
1249 | ||
1250 | /* show reported_mode entry (none, host, dedicated or boost) */ | |
1251 | static ssize_t bq2415x_sysfs_show_reported_mode(struct device *dev, | |
6c47a3e0 AV |
1252 | struct device_attribute *attr, |
1253 | char *buf) | |
0bc98cc6 PR |
1254 | { |
1255 | struct power_supply *psy = dev_get_drvdata(dev); | |
1256 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, | |
6c47a3e0 | 1257 | charger); |
0bc98cc6 PR |
1258 | |
1259 | if (bq->automode < 0) | |
1260 | return -EINVAL; | |
1261 | ||
1262 | switch (bq->reported_mode) { | |
ac6324e7 PR |
1263 | case BQ2415X_MODE_OFF: |
1264 | return sprintf(buf, "off\n"); | |
0bc98cc6 PR |
1265 | case BQ2415X_MODE_NONE: |
1266 | return sprintf(buf, "none\n"); | |
1267 | case BQ2415X_MODE_HOST_CHARGER: | |
1268 | return sprintf(buf, "host\n"); | |
1269 | case BQ2415X_MODE_DEDICATED_CHARGER: | |
1270 | return sprintf(buf, "dedicated\n"); | |
1271 | case BQ2415X_MODE_BOOST: | |
1272 | return sprintf(buf, "boost\n"); | |
1273 | } | |
1274 | ||
1275 | return -EINVAL; | |
1276 | } | |
1277 | ||
1278 | /* directly set raw value to chip register, format: 'register value' */ | |
1279 | static ssize_t bq2415x_sysfs_set_registers(struct device *dev, | |
6c47a3e0 AV |
1280 | struct device_attribute *attr, |
1281 | const char *buf, | |
1282 | size_t count) | |
0bc98cc6 PR |
1283 | { |
1284 | struct power_supply *psy = dev_get_drvdata(dev); | |
1285 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, | |
6c47a3e0 | 1286 | charger); |
0bc98cc6 PR |
1287 | ssize_t ret = 0; |
1288 | unsigned int reg; | |
1289 | unsigned int val; | |
1290 | ||
1291 | if (sscanf(buf, "%x %x", ®, &val) != 2) | |
1292 | return -EINVAL; | |
1293 | ||
1294 | if (reg > 4 || val > 255) | |
1295 | return -EINVAL; | |
1296 | ||
1297 | ret = bq2415x_i2c_write(bq, reg, val); | |
1298 | if (ret < 0) | |
1299 | return ret; | |
6c47a3e0 | 1300 | return count; |
0bc98cc6 PR |
1301 | } |
1302 | ||
1303 | /* print value of chip register, format: 'register=value' */ | |
1304 | static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq, | |
6c47a3e0 AV |
1305 | u8 reg, |
1306 | char *buf) | |
0bc98cc6 PR |
1307 | { |
1308 | int ret = bq2415x_i2c_read(bq, reg); | |
6c47a3e0 | 1309 | |
0bc98cc6 PR |
1310 | if (ret < 0) |
1311 | return sprintf(buf, "%#.2x=error %d\n", reg, ret); | |
6c47a3e0 | 1312 | return sprintf(buf, "%#.2x=%#.2x\n", reg, ret); |
0bc98cc6 PR |
1313 | } |
1314 | ||
1315 | /* show all raw values of chip register, format per line: 'register=value' */ | |
1316 | static ssize_t bq2415x_sysfs_show_registers(struct device *dev, | |
6c47a3e0 AV |
1317 | struct device_attribute *attr, |
1318 | char *buf) | |
0bc98cc6 PR |
1319 | { |
1320 | struct power_supply *psy = dev_get_drvdata(dev); | |
1321 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, | |
6c47a3e0 | 1322 | charger); |
0bc98cc6 PR |
1323 | ssize_t ret = 0; |
1324 | ||
1325 | ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_STATUS, buf+ret); | |
1326 | ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CONTROL, buf+ret); | |
1327 | ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VOLTAGE, buf+ret); | |
1328 | ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VENDER, buf+ret); | |
1329 | ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CURRENT, buf+ret); | |
1330 | return ret; | |
1331 | } | |
1332 | ||
1333 | /* set current and voltage limit entries (in mA or mV) */ | |
1334 | static ssize_t bq2415x_sysfs_set_limit(struct device *dev, | |
6c47a3e0 AV |
1335 | struct device_attribute *attr, |
1336 | const char *buf, | |
1337 | size_t count) | |
0bc98cc6 PR |
1338 | { |
1339 | struct power_supply *psy = dev_get_drvdata(dev); | |
1340 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, | |
6c47a3e0 | 1341 | charger); |
0bc98cc6 PR |
1342 | long val; |
1343 | int ret; | |
1344 | ||
1345 | if (kstrtol(buf, 10, &val) < 0) | |
1346 | return -EINVAL; | |
1347 | ||
1348 | if (strcmp(attr->attr.name, "current_limit") == 0) | |
1349 | ret = bq2415x_set_current_limit(bq, val); | |
1350 | else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0) | |
1351 | ret = bq2415x_set_weak_battery_voltage(bq, val); | |
1352 | else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0) | |
1353 | ret = bq2415x_set_battery_regulation_voltage(bq, val); | |
1354 | else if (strcmp(attr->attr.name, "charge_current") == 0) | |
1355 | ret = bq2415x_set_charge_current(bq, val); | |
1356 | else if (strcmp(attr->attr.name, "termination_current") == 0) | |
1357 | ret = bq2415x_set_termination_current(bq, val); | |
1358 | else | |
1359 | return -EINVAL; | |
1360 | ||
1361 | if (ret < 0) | |
1362 | return ret; | |
6c47a3e0 | 1363 | return count; |
0bc98cc6 PR |
1364 | } |
1365 | ||
1366 | /* show current and voltage limit entries (in mA or mV) */ | |
1367 | static ssize_t bq2415x_sysfs_show_limit(struct device *dev, | |
6c47a3e0 AV |
1368 | struct device_attribute *attr, |
1369 | char *buf) | |
0bc98cc6 PR |
1370 | { |
1371 | struct power_supply *psy = dev_get_drvdata(dev); | |
1372 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, | |
6c47a3e0 | 1373 | charger); |
0bc98cc6 PR |
1374 | int ret; |
1375 | ||
1376 | if (strcmp(attr->attr.name, "current_limit") == 0) | |
1377 | ret = bq2415x_get_current_limit(bq); | |
1378 | else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0) | |
1379 | ret = bq2415x_get_weak_battery_voltage(bq); | |
1380 | else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0) | |
1381 | ret = bq2415x_get_battery_regulation_voltage(bq); | |
1382 | else if (strcmp(attr->attr.name, "charge_current") == 0) | |
1383 | ret = bq2415x_get_charge_current(bq); | |
1384 | else if (strcmp(attr->attr.name, "termination_current") == 0) | |
1385 | ret = bq2415x_get_termination_current(bq); | |
1386 | else | |
1387 | return -EINVAL; | |
1388 | ||
1389 | if (ret < 0) | |
1390 | return ret; | |
6c47a3e0 | 1391 | return sprintf(buf, "%d\n", ret); |
0bc98cc6 PR |
1392 | } |
1393 | ||
1394 | /* set *_enable entries */ | |
1395 | static ssize_t bq2415x_sysfs_set_enable(struct device *dev, | |
6c47a3e0 AV |
1396 | struct device_attribute *attr, |
1397 | const char *buf, | |
1398 | size_t count) | |
0bc98cc6 PR |
1399 | { |
1400 | struct power_supply *psy = dev_get_drvdata(dev); | |
1401 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, | |
6c47a3e0 | 1402 | charger); |
0bc98cc6 PR |
1403 | enum bq2415x_command command; |
1404 | long val; | |
1405 | int ret; | |
1406 | ||
1407 | if (kstrtol(buf, 10, &val) < 0) | |
1408 | return -EINVAL; | |
1409 | ||
1410 | if (strcmp(attr->attr.name, "charge_termination_enable") == 0) | |
1411 | command = val ? BQ2415X_CHARGE_TERMINATION_ENABLE : | |
1412 | BQ2415X_CHARGE_TERMINATION_DISABLE; | |
1413 | else if (strcmp(attr->attr.name, "high_impedance_enable") == 0) | |
1414 | command = val ? BQ2415X_HIGH_IMPEDANCE_ENABLE : | |
1415 | BQ2415X_HIGH_IMPEDANCE_DISABLE; | |
1416 | else if (strcmp(attr->attr.name, "otg_pin_enable") == 0) | |
1417 | command = val ? BQ2415X_OTG_PIN_ENABLE : | |
1418 | BQ2415X_OTG_PIN_DISABLE; | |
1419 | else if (strcmp(attr->attr.name, "stat_pin_enable") == 0) | |
1420 | command = val ? BQ2415X_STAT_PIN_ENABLE : | |
1421 | BQ2415X_STAT_PIN_DISABLE; | |
1422 | else | |
1423 | return -EINVAL; | |
1424 | ||
1425 | ret = bq2415x_exec_command(bq, command); | |
1426 | if (ret < 0) | |
1427 | return ret; | |
6c47a3e0 | 1428 | return count; |
0bc98cc6 PR |
1429 | } |
1430 | ||
1431 | /* show *_enable entries */ | |
1432 | static ssize_t bq2415x_sysfs_show_enable(struct device *dev, | |
6c47a3e0 AV |
1433 | struct device_attribute *attr, |
1434 | char *buf) | |
0bc98cc6 PR |
1435 | { |
1436 | struct power_supply *psy = dev_get_drvdata(dev); | |
1437 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, | |
6c47a3e0 | 1438 | charger); |
0bc98cc6 PR |
1439 | enum bq2415x_command command; |
1440 | int ret; | |
1441 | ||
1442 | if (strcmp(attr->attr.name, "charge_termination_enable") == 0) | |
1443 | command = BQ2415X_CHARGE_TERMINATION_STATUS; | |
1444 | else if (strcmp(attr->attr.name, "high_impedance_enable") == 0) | |
1445 | command = BQ2415X_HIGH_IMPEDANCE_STATUS; | |
1446 | else if (strcmp(attr->attr.name, "otg_pin_enable") == 0) | |
1447 | command = BQ2415X_OTG_PIN_STATUS; | |
1448 | else if (strcmp(attr->attr.name, "stat_pin_enable") == 0) | |
1449 | command = BQ2415X_STAT_PIN_STATUS; | |
1450 | else | |
1451 | return -EINVAL; | |
1452 | ||
1453 | ret = bq2415x_exec_command(bq, command); | |
1454 | if (ret < 0) | |
1455 | return ret; | |
6c47a3e0 | 1456 | return sprintf(buf, "%d\n", ret); |
0bc98cc6 PR |
1457 | } |
1458 | ||
1459 | static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO, | |
1460 | bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); | |
1461 | static DEVICE_ATTR(weak_battery_voltage, S_IWUSR | S_IRUGO, | |
1462 | bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); | |
1463 | static DEVICE_ATTR(battery_regulation_voltage, S_IWUSR | S_IRUGO, | |
1464 | bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); | |
1465 | static DEVICE_ATTR(charge_current, S_IWUSR | S_IRUGO, | |
1466 | bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); | |
1467 | static DEVICE_ATTR(termination_current, S_IWUSR | S_IRUGO, | |
1468 | bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); | |
1469 | ||
1470 | static DEVICE_ATTR(charge_termination_enable, S_IWUSR | S_IRUGO, | |
1471 | bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); | |
1472 | static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO, | |
1473 | bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); | |
1474 | static DEVICE_ATTR(otg_pin_enable, S_IWUSR | S_IRUGO, | |
1475 | bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); | |
1476 | static DEVICE_ATTR(stat_pin_enable, S_IWUSR | S_IRUGO, | |
1477 | bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); | |
1478 | ||
1479 | static DEVICE_ATTR(reported_mode, S_IRUGO, | |
1480 | bq2415x_sysfs_show_reported_mode, NULL); | |
1481 | static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO, | |
1482 | bq2415x_sysfs_show_mode, bq2415x_sysfs_set_mode); | |
1483 | static DEVICE_ATTR(timer, S_IWUSR | S_IRUGO, | |
1484 | bq2415x_sysfs_show_timer, bq2415x_sysfs_set_timer); | |
1485 | ||
1486 | static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO, | |
1487 | bq2415x_sysfs_show_registers, bq2415x_sysfs_set_registers); | |
1488 | ||
1489 | static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); | |
1490 | static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); | |
1491 | static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); | |
1492 | static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); | |
1493 | ||
1494 | static struct attribute *bq2415x_sysfs_attributes[] = { | |
6c47a3e0 AV |
1495 | /* |
1496 | * TODO: some (appropriate) of these attrs should be switched to | |
1497 | * use power supply class props. | |
1498 | */ | |
0bc98cc6 PR |
1499 | &dev_attr_current_limit.attr, |
1500 | &dev_attr_weak_battery_voltage.attr, | |
1501 | &dev_attr_battery_regulation_voltage.attr, | |
1502 | &dev_attr_charge_current.attr, | |
1503 | &dev_attr_termination_current.attr, | |
1504 | ||
1505 | &dev_attr_charge_termination_enable.attr, | |
1506 | &dev_attr_high_impedance_enable.attr, | |
1507 | &dev_attr_otg_pin_enable.attr, | |
1508 | &dev_attr_stat_pin_enable.attr, | |
1509 | ||
1510 | &dev_attr_reported_mode.attr, | |
1511 | &dev_attr_mode.attr, | |
1512 | &dev_attr_timer.attr, | |
1513 | ||
1514 | &dev_attr_registers.attr, | |
1515 | ||
1516 | &dev_attr_otg_status.attr, | |
1517 | &dev_attr_charge_status.attr, | |
1518 | &dev_attr_boost_status.attr, | |
1519 | &dev_attr_fault_status.attr, | |
1520 | NULL, | |
1521 | }; | |
1522 | ||
1523 | static const struct attribute_group bq2415x_sysfs_attr_group = { | |
1524 | .attrs = bq2415x_sysfs_attributes, | |
1525 | }; | |
1526 | ||
1527 | static int bq2415x_sysfs_init(struct bq2415x_device *bq) | |
1528 | { | |
1529 | return sysfs_create_group(&bq->charger.dev->kobj, | |
1530 | &bq2415x_sysfs_attr_group); | |
1531 | } | |
1532 | ||
1533 | static void bq2415x_sysfs_exit(struct bq2415x_device *bq) | |
1534 | { | |
1535 | sysfs_remove_group(&bq->charger.dev->kobj, &bq2415x_sysfs_attr_group); | |
1536 | } | |
1537 | ||
1538 | /* main bq2415x probe function */ | |
1539 | static int bq2415x_probe(struct i2c_client *client, | |
6c47a3e0 | 1540 | const struct i2c_device_id *id) |
0bc98cc6 PR |
1541 | { |
1542 | int ret; | |
1543 | int num; | |
1544 | char *name; | |
1545 | struct bq2415x_device *bq; | |
faffd234 SR |
1546 | struct device_node *np = client->dev.of_node; |
1547 | struct bq2415x_platform_data *pdata = client->dev.platform_data; | |
0bc98cc6 | 1548 | |
faffd234 SR |
1549 | if (!np && !pdata) { |
1550 | dev_err(&client->dev, "platform data missing\n"); | |
0bc98cc6 PR |
1551 | return -ENODEV; |
1552 | } | |
1553 | ||
1554 | /* Get new ID for the new device */ | |
0bc98cc6 | 1555 | mutex_lock(&bq2415x_id_mutex); |
05e2cefa | 1556 | num = idr_alloc(&bq2415x_id, client, 0, 0, GFP_KERNEL); |
0bc98cc6 | 1557 | mutex_unlock(&bq2415x_id_mutex); |
05e2cefa TH |
1558 | if (num < 0) |
1559 | return num; | |
0bc98cc6 PR |
1560 | |
1561 | name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num); | |
1562 | if (!name) { | |
1563 | dev_err(&client->dev, "failed to allocate device name\n"); | |
1564 | ret = -ENOMEM; | |
1565 | goto error_1; | |
1566 | } | |
1567 | ||
a9672e13 | 1568 | bq = devm_kzalloc(&client->dev, sizeof(*bq), GFP_KERNEL); |
0bc98cc6 PR |
1569 | if (!bq) { |
1570 | dev_err(&client->dev, "failed to allocate device data\n"); | |
1571 | ret = -ENOMEM; | |
1572 | goto error_2; | |
1573 | } | |
1574 | ||
faffd234 SR |
1575 | if (np) { |
1576 | bq->notify_psy = power_supply_get_by_phandle(np, "ti,usb-charger-detection"); | |
1577 | ||
1578 | if (!bq->notify_psy) | |
1579 | return -EPROBE_DEFER; | |
1580 | } | |
1581 | else if (pdata->notify_device) | |
1582 | bq->notify_psy = power_supply_get_by_name(pdata->notify_device); | |
1583 | else | |
1584 | bq->notify_psy = NULL; | |
1585 | ||
0bc98cc6 PR |
1586 | i2c_set_clientdata(client, bq); |
1587 | ||
1588 | bq->id = num; | |
1589 | bq->dev = &client->dev; | |
1590 | bq->chip = id->driver_data; | |
1591 | bq->name = name; | |
ac6324e7 PR |
1592 | bq->mode = BQ2415X_MODE_OFF; |
1593 | bq->reported_mode = BQ2415X_MODE_OFF; | |
0bc98cc6 PR |
1594 | bq->autotimer = 0; |
1595 | bq->automode = 0; | |
1596 | ||
faffd234 SR |
1597 | if (np) { |
1598 | ret = of_property_read_u32(np, "ti,current-limit", | |
1599 | &bq->init_data.current_limit); | |
1600 | if (ret) | |
1601 | return ret; | |
1602 | ret = of_property_read_u32(np, "ti,weak-battery-voltage", | |
1603 | &bq->init_data.weak_battery_voltage); | |
1604 | if (ret) | |
1605 | return ret; | |
1606 | ret = of_property_read_u32(np, "ti,battery-regulation-voltage", | |
1607 | &bq->init_data.battery_regulation_voltage); | |
1608 | if (ret) | |
1609 | return ret; | |
1610 | ret = of_property_read_u32(np, "ti,charge-current", | |
1611 | &bq->init_data.charge_current); | |
1612 | if (ret) | |
1613 | return ret; | |
1614 | ret = of_property_read_u32(np, "ti,termination-current", | |
1615 | &bq->init_data.termination_current); | |
1616 | if (ret) | |
1617 | return ret; | |
1618 | ret = of_property_read_u32(np, "ti,resistor-sense", | |
1619 | &bq->init_data.resistor_sense); | |
1620 | if (ret) | |
1621 | return ret; | |
1622 | } else { | |
1623 | memcpy(&bq->init_data, pdata, sizeof(bq->init_data)); | |
1624 | } | |
0bc98cc6 PR |
1625 | |
1626 | bq2415x_reset_chip(bq); | |
1627 | ||
1628 | ret = bq2415x_power_supply_init(bq); | |
1629 | if (ret) { | |
1630 | dev_err(bq->dev, "failed to register power supply: %d\n", ret); | |
a9672e13 | 1631 | goto error_2; |
0bc98cc6 PR |
1632 | } |
1633 | ||
1634 | ret = bq2415x_sysfs_init(bq); | |
1635 | if (ret) { | |
1636 | dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret); | |
a9672e13 | 1637 | goto error_3; |
0bc98cc6 PR |
1638 | } |
1639 | ||
1640 | ret = bq2415x_set_defaults(bq); | |
1641 | if (ret) { | |
1642 | dev_err(bq->dev, "failed to set default values: %d\n", ret); | |
a9672e13 | 1643 | goto error_4; |
0bc98cc6 PR |
1644 | } |
1645 | ||
faffd234 | 1646 | if (bq->notify_psy) { |
32260308 PR |
1647 | bq->nb.notifier_call = bq2415x_notifier_call; |
1648 | ret = power_supply_reg_notifier(&bq->nb); | |
1649 | if (ret) { | |
1650 | dev_err(bq->dev, "failed to reg notifier: %d\n", ret); | |
1651 | goto error_5; | |
1652 | } | |
faffd234 SR |
1653 | |
1654 | /* Query for initial reported_mode and set it */ | |
1655 | bq2415x_notifier_call(&bq->nb, PSY_EVENT_PROP_CHANGED, bq->notify_psy); | |
1656 | bq2415x_set_mode(bq, bq->reported_mode); | |
1657 | ||
32260308 PR |
1658 | bq->automode = 1; |
1659 | dev_info(bq->dev, "automode enabled\n"); | |
0bc98cc6 PR |
1660 | } else { |
1661 | bq->automode = -1; | |
1662 | dev_info(bq->dev, "automode not supported\n"); | |
1663 | } | |
1664 | ||
1665 | INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work); | |
1666 | bq2415x_set_autotimer(bq, 1); | |
1667 | ||
1668 | dev_info(bq->dev, "driver registered\n"); | |
1669 | return 0; | |
1670 | ||
32260308 | 1671 | error_5: |
0bc98cc6 | 1672 | error_4: |
a9672e13 | 1673 | bq2415x_sysfs_exit(bq); |
0bc98cc6 | 1674 | error_3: |
a9672e13 | 1675 | bq2415x_power_supply_exit(bq); |
0bc98cc6 PR |
1676 | error_2: |
1677 | kfree(name); | |
1678 | error_1: | |
1679 | mutex_lock(&bq2415x_id_mutex); | |
1680 | idr_remove(&bq2415x_id, num); | |
1681 | mutex_unlock(&bq2415x_id_mutex); | |
1682 | ||
1683 | return ret; | |
1684 | } | |
1685 | ||
1686 | /* main bq2415x remove function */ | |
1687 | ||
1688 | static int bq2415x_remove(struct i2c_client *client) | |
1689 | { | |
1690 | struct bq2415x_device *bq = i2c_get_clientdata(client); | |
1691 | ||
faffd234 | 1692 | if (bq->notify_psy) |
32260308 | 1693 | power_supply_unreg_notifier(&bq->nb); |
0bc98cc6 PR |
1694 | |
1695 | bq2415x_sysfs_exit(bq); | |
1696 | bq2415x_power_supply_exit(bq); | |
1697 | ||
1698 | bq2415x_reset_chip(bq); | |
1699 | ||
1700 | mutex_lock(&bq2415x_id_mutex); | |
1701 | idr_remove(&bq2415x_id, bq->id); | |
1702 | mutex_unlock(&bq2415x_id_mutex); | |
1703 | ||
1704 | dev_info(bq->dev, "driver unregistered\n"); | |
1705 | ||
1706 | kfree(bq->name); | |
0bc98cc6 PR |
1707 | |
1708 | return 0; | |
1709 | } | |
1710 | ||
1711 | static const struct i2c_device_id bq2415x_i2c_id_table[] = { | |
1712 | { "bq2415x", BQUNKNOWN }, | |
1713 | { "bq24150", BQ24150 }, | |
1714 | { "bq24150a", BQ24150A }, | |
1715 | { "bq24151", BQ24151 }, | |
1716 | { "bq24151a", BQ24151A }, | |
1717 | { "bq24152", BQ24152 }, | |
1718 | { "bq24153", BQ24153 }, | |
1719 | { "bq24153a", BQ24153A }, | |
1720 | { "bq24155", BQ24155 }, | |
1721 | { "bq24156", BQ24156 }, | |
1722 | { "bq24156a", BQ24156A }, | |
1723 | { "bq24158", BQ24158 }, | |
1724 | {}, | |
1725 | }; | |
1726 | MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table); | |
1727 | ||
1728 | static struct i2c_driver bq2415x_driver = { | |
1729 | .driver = { | |
1730 | .name = "bq2415x-charger", | |
1731 | }, | |
1732 | .probe = bq2415x_probe, | |
1733 | .remove = bq2415x_remove, | |
1734 | .id_table = bq2415x_i2c_id_table, | |
1735 | }; | |
463df514 | 1736 | module_i2c_driver(bq2415x_driver); |
0bc98cc6 PR |
1737 | |
1738 | MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>"); | |
1739 | MODULE_DESCRIPTION("bq2415x charger driver"); | |
1740 | MODULE_LICENSE("GPL"); |