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a830d28b JZ |
1 | /* |
2 | * Battery driver for Marvell 88PM860x PMIC | |
3 | * | |
4 | * Copyright (c) 2012 Marvell International Ltd. | |
5 | * Author: Jett Zhou <jtzhou@marvell.com> | |
6 | * Haojian Zhuang <haojian.zhuang@marvell.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/power_supply.h> | |
18 | #include <linux/mfd/88pm860x.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/uaccess.h> | |
21 | #include <asm/div64.h> | |
22 | ||
23 | /* bit definitions of Status Query Interface 2 */ | |
24 | #define STATUS2_CHG (1 << 2) | |
25 | ||
26 | /* bit definitions of Reset Out Register */ | |
27 | #define RESET_SW_PD (1 << 7) | |
28 | ||
29 | /* bit definitions of PreReg 1 */ | |
30 | #define PREREG1_90MA (0x0) | |
31 | #define PREREG1_180MA (0x1) | |
32 | #define PREREG1_450MA (0x4) | |
33 | #define PREREG1_540MA (0x5) | |
34 | #define PREREG1_1350MA (0xE) | |
35 | #define PREREG1_VSYS_4_5V (3 << 4) | |
36 | ||
37 | /* bit definitions of Charger Control 1 Register */ | |
38 | #define CC1_MODE_OFF (0) | |
39 | #define CC1_MODE_PRECHARGE (1) | |
40 | #define CC1_MODE_FASTCHARGE (2) | |
41 | #define CC1_MODE_PULSECHARGE (3) | |
42 | #define CC1_ITERM_20MA (0 << 2) | |
43 | #define CC1_ITERM_60MA (2 << 2) | |
44 | #define CC1_VFCHG_4_2V (9 << 4) | |
45 | ||
46 | /* bit definitions of Charger Control 2 Register */ | |
47 | #define CC2_ICHG_100MA (0x1) | |
48 | #define CC2_ICHG_500MA (0x9) | |
49 | #define CC2_ICHG_1000MA (0x13) | |
50 | ||
51 | /* bit definitions of Charger Control 3 Register */ | |
52 | #define CC3_180MIN_TIMEOUT (0x6 << 4) | |
53 | #define CC3_270MIN_TIMEOUT (0x7 << 4) | |
54 | #define CC3_360MIN_TIMEOUT (0xA << 4) | |
55 | #define CC3_DISABLE_TIMEOUT (0xF << 4) | |
56 | ||
57 | /* bit definitions of Charger Control 4 Register */ | |
58 | #define CC4_IPRE_40MA (7) | |
59 | #define CC4_VPCHG_3_2V (3 << 4) | |
60 | #define CC4_IFCHG_MON_EN (1 << 6) | |
61 | #define CC4_BTEMP_MON_EN (1 << 7) | |
62 | ||
63 | /* bit definitions of Charger Control 6 Register */ | |
64 | #define CC6_BAT_OV_EN (1 << 2) | |
65 | #define CC6_BAT_UV_EN (1 << 3) | |
66 | #define CC6_UV_VBAT_SET (0x3 << 6) /* 2.8v */ | |
67 | ||
68 | /* bit definitions of Charger Control 7 Register */ | |
69 | #define CC7_BAT_REM_EN (1 << 3) | |
70 | #define CC7_IFSM_EN (1 << 7) | |
71 | ||
72 | /* bit definitions of Measurement Enable 1 Register */ | |
73 | #define MEAS1_VBAT (1 << 0) | |
74 | ||
75 | /* bit definitions of Measurement Enable 3 Register */ | |
76 | #define MEAS3_IBAT_EN (1 << 0) | |
77 | #define MEAS3_CC_EN (1 << 2) | |
78 | ||
79 | #define FSM_INIT 0 | |
80 | #define FSM_DISCHARGE 1 | |
81 | #define FSM_PRECHARGE 2 | |
82 | #define FSM_FASTCHARGE 3 | |
83 | ||
84 | #define PRECHARGE_THRESHOLD 3100 | |
85 | #define POWEROFF_THRESHOLD 3400 | |
86 | #define CHARGE_THRESHOLD 4000 | |
87 | #define DISCHARGE_THRESHOLD 4180 | |
88 | ||
89 | /* over-temperature on PM8606 setting */ | |
90 | #define OVER_TEMP_FLAG (1 << 6) | |
91 | #define OVTEMP_AUTORECOVER (1 << 3) | |
92 | ||
93 | /* over-voltage protect on vchg setting mv */ | |
94 | #define VCHG_NORMAL_LOW 4200 | |
95 | #define VCHG_NORMAL_CHECK 5800 | |
96 | #define VCHG_NORMAL_HIGH 6000 | |
97 | #define VCHG_OVP_LOW 5500 | |
98 | ||
99 | struct pm860x_charger_info { | |
100 | struct pm860x_chip *chip; | |
101 | struct i2c_client *i2c; | |
102 | struct i2c_client *i2c_8606; | |
103 | struct device *dev; | |
104 | ||
105 | struct power_supply usb; | |
106 | struct mutex lock; | |
107 | int irq_nums; | |
108 | int irq[7]; | |
109 | unsigned state:3; /* fsm state */ | |
110 | unsigned online:1; /* usb charger */ | |
111 | unsigned present:1; /* battery present */ | |
112 | unsigned allowed:1; | |
113 | }; | |
114 | ||
115 | static char *pm860x_supplied_to[] = { | |
116 | "battery-monitor", | |
117 | }; | |
118 | ||
119 | static int measure_vchg(struct pm860x_charger_info *info, int *data) | |
120 | { | |
121 | unsigned char buf[2]; | |
122 | int ret = 0; | |
123 | ||
124 | ret = pm860x_bulk_read(info->i2c, PM8607_VCHG_MEAS1, 2, buf); | |
125 | if (ret < 0) | |
126 | return ret; | |
127 | ||
128 | *data = ((buf[0] & 0xff) << 4) | (buf[1] & 0x0f); | |
129 | /* V_BATT_MEAS(mV) = value * 5 * 1.8 * 1000 / (2^12) */ | |
130 | *data = ((*data & 0xfff) * 9 * 125) >> 9; | |
131 | ||
132 | dev_dbg(info->dev, "%s, vchg: %d mv\n", __func__, *data); | |
133 | ||
134 | return ret; | |
135 | } | |
136 | ||
137 | static void set_vchg_threshold(struct pm860x_charger_info *info, | |
138 | int min, int max) | |
139 | { | |
140 | int data; | |
141 | ||
142 | /* (tmp << 8) * / 5 / 1800 */ | |
143 | if (min <= 0) | |
144 | data = 0; | |
145 | else | |
146 | data = (min << 5) / 1125; | |
147 | pm860x_reg_write(info->i2c, PM8607_VCHG_LOWTH, data); | |
148 | dev_dbg(info->dev, "VCHG_LOWTH:%dmv, 0x%x\n", min, data); | |
149 | ||
150 | if (max <= 0) | |
151 | data = 0xff; | |
152 | else | |
153 | data = (max << 5) / 1125; | |
154 | pm860x_reg_write(info->i2c, PM8607_VCHG_HIGHTH, data); | |
155 | dev_dbg(info->dev, "VCHG_HIGHTH:%dmv, 0x%x\n", max, data); | |
156 | ||
157 | } | |
158 | ||
159 | static void set_vbatt_threshold(struct pm860x_charger_info *info, | |
160 | int min, int max) | |
161 | { | |
162 | int data; | |
163 | ||
164 | /* (tmp << 8) * 3 / 1800 */ | |
165 | if (min <= 0) | |
166 | data = 0; | |
167 | else | |
168 | data = (min << 5) / 675; | |
169 | pm860x_reg_write(info->i2c, PM8607_VBAT_LOWTH, data); | |
170 | dev_dbg(info->dev, "VBAT Min:%dmv, LOWTH:0x%x\n", min, data); | |
171 | ||
172 | if (max <= 0) | |
173 | data = 0xff; | |
174 | else | |
175 | data = (max << 5) / 675; | |
176 | pm860x_reg_write(info->i2c, PM8607_VBAT_HIGHTH, data); | |
177 | dev_dbg(info->dev, "VBAT Max:%dmv, HIGHTH:0x%x\n", max, data); | |
178 | ||
179 | return; | |
180 | } | |
181 | ||
182 | static int start_precharge(struct pm860x_charger_info *info) | |
183 | { | |
184 | int ret; | |
185 | ||
186 | dev_dbg(info->dev, "Start Pre-charging!\n"); | |
187 | set_vbatt_threshold(info, 0, 0); | |
188 | ||
189 | ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA, | |
190 | PREREG1_1350MA | PREREG1_VSYS_4_5V); | |
191 | if (ret < 0) | |
192 | goto out; | |
193 | /* stop charging */ | |
194 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, | |
195 | CC1_MODE_OFF); | |
196 | if (ret < 0) | |
197 | goto out; | |
198 | /* set 270 minutes timeout */ | |
199 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4), | |
200 | CC3_270MIN_TIMEOUT); | |
201 | if (ret < 0) | |
202 | goto out; | |
203 | /* set precharge current, termination voltage, IBAT & TBAT monitor */ | |
204 | ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL4, | |
205 | CC4_IPRE_40MA | CC4_VPCHG_3_2V | | |
206 | CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN); | |
207 | if (ret < 0) | |
208 | goto out; | |
209 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7, | |
210 | CC7_BAT_REM_EN | CC7_IFSM_EN, | |
211 | CC7_BAT_REM_EN | CC7_IFSM_EN); | |
212 | if (ret < 0) | |
213 | goto out; | |
214 | /* trigger precharge */ | |
215 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, | |
216 | CC1_MODE_PRECHARGE); | |
217 | out: | |
218 | return ret; | |
219 | } | |
220 | ||
221 | static int start_fastcharge(struct pm860x_charger_info *info) | |
222 | { | |
223 | int ret; | |
224 | ||
225 | dev_dbg(info->dev, "Start Fast-charging!\n"); | |
226 | ||
227 | /* set fastcharge termination current & voltage, disable charging */ | |
228 | ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL1, | |
229 | CC1_MODE_OFF | CC1_ITERM_60MA | | |
230 | CC1_VFCHG_4_2V); | |
231 | if (ret < 0) | |
232 | goto out; | |
233 | ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA, | |
234 | PREREG1_540MA | PREREG1_VSYS_4_5V); | |
235 | if (ret < 0) | |
236 | goto out; | |
237 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL2, 0x1f, | |
238 | CC2_ICHG_500MA); | |
239 | if (ret < 0) | |
240 | goto out; | |
241 | /* set 270 minutes timeout */ | |
242 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4), | |
243 | CC3_270MIN_TIMEOUT); | |
244 | if (ret < 0) | |
245 | goto out; | |
246 | /* set IBAT & TBAT monitor */ | |
247 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL4, | |
248 | CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN, | |
249 | CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN); | |
250 | if (ret < 0) | |
251 | goto out; | |
252 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL6, | |
253 | CC6_BAT_OV_EN | CC6_BAT_UV_EN | | |
254 | CC6_UV_VBAT_SET, | |
255 | CC6_BAT_OV_EN | CC6_BAT_UV_EN | | |
256 | CC6_UV_VBAT_SET); | |
257 | if (ret < 0) | |
258 | goto out; | |
259 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7, | |
260 | CC7_BAT_REM_EN | CC7_IFSM_EN, | |
261 | CC7_BAT_REM_EN | CC7_IFSM_EN); | |
262 | if (ret < 0) | |
263 | goto out; | |
264 | /* launch fast-charge */ | |
265 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, | |
266 | CC1_MODE_FASTCHARGE); | |
267 | /* vchg threshold setting */ | |
268 | set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_NORMAL_HIGH); | |
269 | out: | |
270 | return ret; | |
271 | } | |
272 | ||
273 | static void stop_charge(struct pm860x_charger_info *info, int vbatt) | |
274 | { | |
275 | dev_dbg(info->dev, "Stop charging!\n"); | |
276 | pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, CC1_MODE_OFF); | |
277 | if (vbatt > CHARGE_THRESHOLD && info->online) | |
278 | set_vbatt_threshold(info, CHARGE_THRESHOLD, 0); | |
279 | } | |
280 | ||
281 | static void power_off_notification(struct pm860x_charger_info *info) | |
282 | { | |
283 | dev_dbg(info->dev, "Power-off notification!\n"); | |
284 | } | |
285 | ||
286 | static int set_charging_fsm(struct pm860x_charger_info *info) | |
287 | { | |
288 | struct power_supply *psy; | |
289 | union power_supply_propval data; | |
290 | unsigned char fsm_state[][16] = { "init", "discharge", "precharge", | |
291 | "fastcharge", | |
292 | }; | |
293 | int ret; | |
294 | int vbatt; | |
295 | ||
296 | psy = power_supply_get_by_name(pm860x_supplied_to[0]); | |
297 | if (!psy) | |
298 | return -EINVAL; | |
299 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW, &data); | |
300 | if (ret) | |
301 | return ret; | |
302 | vbatt = data.intval / 1000; | |
303 | ||
304 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_PRESENT, &data); | |
305 | if (ret) | |
306 | return ret; | |
307 | ||
308 | mutex_lock(&info->lock); | |
309 | info->present = data.intval; | |
310 | ||
311 | dev_dbg(info->dev, "Entering FSM:%s, Charger:%s, Battery:%s, " | |
312 | "Allowed:%d\n", | |
313 | &fsm_state[info->state][0], | |
314 | (info->online) ? "online" : "N/A", | |
315 | (info->present) ? "present" : "N/A", info->allowed); | |
316 | dev_dbg(info->dev, "set_charging_fsm:vbatt:%d(mV)\n", vbatt); | |
317 | ||
318 | switch (info->state) { | |
319 | case FSM_INIT: | |
320 | if (info->online && info->present && info->allowed) { | |
321 | if (vbatt < PRECHARGE_THRESHOLD) { | |
322 | info->state = FSM_PRECHARGE; | |
323 | start_precharge(info); | |
324 | } else if (vbatt > DISCHARGE_THRESHOLD) { | |
325 | info->state = FSM_DISCHARGE; | |
326 | stop_charge(info, vbatt); | |
327 | } else if (vbatt < DISCHARGE_THRESHOLD) { | |
328 | info->state = FSM_FASTCHARGE; | |
329 | start_fastcharge(info); | |
330 | } | |
331 | } else { | |
332 | if (vbatt < POWEROFF_THRESHOLD) { | |
333 | power_off_notification(info); | |
334 | } else { | |
335 | info->state = FSM_DISCHARGE; | |
336 | stop_charge(info, vbatt); | |
337 | } | |
338 | } | |
339 | break; | |
340 | case FSM_PRECHARGE: | |
341 | if (info->online && info->present && info->allowed) { | |
342 | if (vbatt > PRECHARGE_THRESHOLD) { | |
343 | info->state = FSM_FASTCHARGE; | |
344 | start_fastcharge(info); | |
345 | } | |
346 | } else { | |
347 | info->state = FSM_DISCHARGE; | |
348 | stop_charge(info, vbatt); | |
349 | } | |
350 | break; | |
351 | case FSM_FASTCHARGE: | |
352 | if (info->online && info->present && info->allowed) { | |
353 | if (vbatt < PRECHARGE_THRESHOLD) { | |
354 | info->state = FSM_PRECHARGE; | |
355 | start_precharge(info); | |
356 | } | |
357 | } else { | |
358 | info->state = FSM_DISCHARGE; | |
359 | stop_charge(info, vbatt); | |
360 | } | |
361 | break; | |
362 | case FSM_DISCHARGE: | |
363 | if (info->online && info->present && info->allowed) { | |
364 | if (vbatt < PRECHARGE_THRESHOLD) { | |
365 | info->state = FSM_PRECHARGE; | |
366 | start_precharge(info); | |
367 | } else if (vbatt < DISCHARGE_THRESHOLD) { | |
368 | info->state = FSM_FASTCHARGE; | |
369 | start_fastcharge(info); | |
370 | } | |
371 | } else { | |
372 | if (vbatt < POWEROFF_THRESHOLD) | |
373 | power_off_notification(info); | |
374 | else if (vbatt > CHARGE_THRESHOLD && info->online) | |
375 | set_vbatt_threshold(info, CHARGE_THRESHOLD, 0); | |
376 | } | |
377 | break; | |
378 | default: | |
379 | dev_warn(info->dev, "FSM meets wrong state:%d\n", | |
380 | info->state); | |
381 | break; | |
382 | } | |
383 | dev_dbg(info->dev, | |
384 | "Out FSM:%s, Charger:%s, Battery:%s, Allowed:%d\n", | |
385 | &fsm_state[info->state][0], | |
386 | (info->online) ? "online" : "N/A", | |
387 | (info->present) ? "present" : "N/A", info->allowed); | |
388 | mutex_unlock(&info->lock); | |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
393 | static irqreturn_t pm860x_charger_handler(int irq, void *data) | |
394 | { | |
395 | struct pm860x_charger_info *info = data; | |
396 | int ret; | |
397 | ||
398 | mutex_lock(&info->lock); | |
399 | ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); | |
400 | if (ret < 0) { | |
401 | mutex_unlock(&info->lock); | |
402 | goto out; | |
403 | } | |
404 | if (ret & STATUS2_CHG) { | |
405 | info->online = 1; | |
406 | info->allowed = 1; | |
407 | } else { | |
408 | info->online = 0; | |
409 | info->allowed = 0; | |
410 | } | |
411 | mutex_unlock(&info->lock); | |
412 | dev_dbg(info->dev, "%s, Charger:%s, Allowed:%d\n", __func__, | |
413 | (info->online) ? "online" : "N/A", info->allowed); | |
414 | ||
415 | set_charging_fsm(info); | |
416 | ||
417 | power_supply_changed(&info->usb); | |
418 | out: | |
419 | return IRQ_HANDLED; | |
420 | } | |
421 | ||
422 | static irqreturn_t pm860x_temp_handler(int irq, void *data) | |
423 | { | |
424 | struct power_supply *psy; | |
425 | struct pm860x_charger_info *info = data; | |
426 | union power_supply_propval temp; | |
427 | int value; | |
428 | int ret; | |
429 | ||
430 | psy = power_supply_get_by_name(pm860x_supplied_to[0]); | |
431 | if (!psy) | |
432 | goto out; | |
433 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_TEMP, &temp); | |
434 | if (ret) | |
435 | goto out; | |
436 | value = temp.intval / 10; | |
437 | ||
438 | mutex_lock(&info->lock); | |
439 | /* Temperature < -10 C or >40 C, Will not allow charge */ | |
440 | if (value < -10 || value > 40) | |
441 | info->allowed = 0; | |
442 | else | |
443 | info->allowed = 1; | |
444 | dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed); | |
445 | mutex_unlock(&info->lock); | |
446 | ||
447 | set_charging_fsm(info); | |
448 | out: | |
449 | return IRQ_HANDLED; | |
450 | } | |
451 | ||
452 | static irqreturn_t pm860x_exception_handler(int irq, void *data) | |
453 | { | |
454 | struct pm860x_charger_info *info = data; | |
455 | ||
456 | mutex_lock(&info->lock); | |
457 | info->allowed = 0; | |
458 | mutex_unlock(&info->lock); | |
459 | dev_dbg(info->dev, "%s, irq: %d\n", __func__, irq); | |
460 | ||
461 | set_charging_fsm(info); | |
462 | return IRQ_HANDLED; | |
463 | } | |
464 | ||
465 | static irqreturn_t pm860x_done_handler(int irq, void *data) | |
466 | { | |
467 | struct pm860x_charger_info *info = data; | |
468 | struct power_supply *psy; | |
469 | union power_supply_propval val; | |
470 | int ret; | |
471 | int vbatt; | |
472 | ||
473 | mutex_lock(&info->lock); | |
474 | /* pre-charge done, will transimit to fast-charge stage */ | |
475 | if (info->state == FSM_PRECHARGE) { | |
476 | info->allowed = 1; | |
477 | goto out; | |
478 | } | |
479 | /* | |
480 | * Fast charge done, delay to read | |
481 | * the correct status of CHG_DET. | |
482 | */ | |
483 | mdelay(5); | |
484 | info->allowed = 0; | |
485 | psy = power_supply_get_by_name(pm860x_supplied_to[0]); | |
486 | if (!psy) | |
487 | goto out; | |
488 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW, &val); | |
489 | if (ret) | |
490 | goto out; | |
491 | vbatt = val.intval / 1000; | |
492 | /* | |
493 | * CHG_DONE interrupt is faster than CHG_DET interrupt when | |
494 | * plug in/out usb, So we can not rely on info->online, we | |
495 | * need check pm8607 status register to check usb is online | |
496 | * or not, then we can decide it is real charge done | |
497 | * automatically or it is triggered by usb plug out; | |
498 | */ | |
499 | ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); | |
500 | if (ret < 0) | |
501 | goto out; | |
502 | if (vbatt > CHARGE_THRESHOLD && ret & STATUS2_CHG) | |
503 | psy->set_property(psy, POWER_SUPPLY_PROP_CHARGE_FULL, &val); | |
504 | ||
505 | out: | |
506 | mutex_unlock(&info->lock); | |
507 | dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed); | |
508 | set_charging_fsm(info); | |
509 | ||
510 | return IRQ_HANDLED; | |
511 | } | |
512 | ||
513 | static irqreturn_t pm860x_vbattery_handler(int irq, void *data) | |
514 | { | |
515 | struct pm860x_charger_info *info = data; | |
516 | ||
517 | mutex_lock(&info->lock); | |
518 | ||
519 | set_vbatt_threshold(info, 0, 0); | |
520 | ||
521 | if (info->present && info->online) | |
522 | info->allowed = 1; | |
523 | else | |
524 | info->allowed = 0; | |
525 | mutex_unlock(&info->lock); | |
526 | dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed); | |
527 | ||
528 | set_charging_fsm(info); | |
529 | ||
530 | return IRQ_HANDLED; | |
531 | } | |
532 | ||
533 | static irqreturn_t pm860x_vchg_handler(int irq, void *data) | |
534 | { | |
535 | struct pm860x_charger_info *info = data; | |
536 | int vchg = 0; | |
537 | ||
538 | if (info->present) | |
539 | goto out; | |
540 | ||
541 | measure_vchg(info, &vchg); | |
542 | ||
543 | mutex_lock(&info->lock); | |
544 | if (!info->online) { | |
545 | int status; | |
546 | /* check if over-temp on pm8606 or not */ | |
547 | status = pm860x_reg_read(info->i2c_8606, PM8606_FLAGS); | |
548 | if (status & OVER_TEMP_FLAG) { | |
549 | /* clear over temp flag and set auto recover */ | |
550 | pm860x_set_bits(info->i2c_8606, PM8606_FLAGS, | |
551 | OVER_TEMP_FLAG, OVER_TEMP_FLAG); | |
552 | pm860x_set_bits(info->i2c_8606, | |
553 | PM8606_VSYS, | |
554 | OVTEMP_AUTORECOVER, | |
555 | OVTEMP_AUTORECOVER); | |
556 | dev_dbg(info->dev, | |
0b1587b1 | 557 | "%s, pm8606 over-temp occurred\n", __func__); |
a830d28b JZ |
558 | } |
559 | } | |
560 | ||
561 | if (vchg > VCHG_NORMAL_CHECK) { | |
562 | set_vchg_threshold(info, VCHG_OVP_LOW, 0); | |
563 | info->allowed = 0; | |
564 | dev_dbg(info->dev, | |
0b1587b1 | 565 | "%s,pm8607 over-vchg occurred,vchg = %dmv\n", |
a830d28b JZ |
566 | __func__, vchg); |
567 | } else if (vchg < VCHG_OVP_LOW) { | |
568 | set_vchg_threshold(info, VCHG_NORMAL_LOW, | |
569 | VCHG_NORMAL_HIGH); | |
570 | info->allowed = 1; | |
571 | dev_dbg(info->dev, | |
572 | "%s,pm8607 over-vchg recover,vchg = %dmv\n", | |
573 | __func__, vchg); | |
574 | } | |
575 | mutex_unlock(&info->lock); | |
576 | ||
577 | dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed); | |
578 | set_charging_fsm(info); | |
579 | out: | |
580 | return IRQ_HANDLED; | |
581 | } | |
582 | ||
583 | static int pm860x_usb_get_prop(struct power_supply *psy, | |
584 | enum power_supply_property psp, | |
585 | union power_supply_propval *val) | |
586 | { | |
587 | struct pm860x_charger_info *info = | |
588 | dev_get_drvdata(psy->dev->parent); | |
589 | ||
590 | switch (psp) { | |
591 | case POWER_SUPPLY_PROP_STATUS: | |
592 | if (info->state == FSM_FASTCHARGE || | |
593 | info->state == FSM_PRECHARGE) | |
594 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
595 | else | |
596 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
597 | break; | |
598 | case POWER_SUPPLY_PROP_ONLINE: | |
599 | val->intval = info->online; | |
600 | break; | |
601 | default: | |
602 | return -ENODEV; | |
603 | } | |
604 | return 0; | |
605 | } | |
606 | ||
607 | static enum power_supply_property pm860x_usb_props[] = { | |
608 | POWER_SUPPLY_PROP_STATUS, | |
609 | POWER_SUPPLY_PROP_ONLINE, | |
610 | }; | |
611 | ||
612 | static int pm860x_init_charger(struct pm860x_charger_info *info) | |
613 | { | |
614 | int ret; | |
615 | ||
616 | ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); | |
617 | if (ret < 0) | |
618 | return ret; | |
619 | ||
620 | mutex_lock(&info->lock); | |
621 | info->state = FSM_INIT; | |
622 | if (ret & STATUS2_CHG) { | |
623 | info->online = 1; | |
624 | info->allowed = 1; | |
625 | } else { | |
626 | info->online = 0; | |
627 | info->allowed = 0; | |
628 | } | |
629 | mutex_unlock(&info->lock); | |
630 | ||
631 | set_charging_fsm(info); | |
632 | return 0; | |
633 | } | |
634 | ||
f1ade352 | 635 | static struct pm860x_irq_desc { |
a830d28b JZ |
636 | const char *name; |
637 | irqreturn_t (*handler)(int irq, void *data); | |
638 | } pm860x_irq_descs[] = { | |
639 | { "usb supply detect", pm860x_charger_handler }, | |
640 | { "charge done", pm860x_done_handler }, | |
641 | { "charge timeout", pm860x_exception_handler }, | |
642 | { "charge fault", pm860x_exception_handler }, | |
643 | { "temperature", pm860x_temp_handler }, | |
644 | { "vbatt", pm860x_vbattery_handler }, | |
645 | { "vchg", pm860x_vchg_handler }, | |
646 | }; | |
647 | ||
c8afa640 | 648 | static int pm860x_charger_probe(struct platform_device *pdev) |
a830d28b JZ |
649 | { |
650 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); | |
651 | struct pm860x_charger_info *info; | |
652 | int ret; | |
653 | int count; | |
654 | int i; | |
655 | int j; | |
656 | ||
657 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
658 | if (!info) | |
659 | return -ENOMEM; | |
660 | ||
661 | count = pdev->num_resources; | |
662 | for (i = 0, j = 0; i < count; i++) { | |
663 | info->irq[j] = platform_get_irq(pdev, i); | |
664 | if (info->irq[j] < 0) | |
665 | continue; | |
666 | j++; | |
667 | } | |
668 | info->irq_nums = j; | |
669 | ||
670 | info->chip = chip; | |
671 | info->i2c = | |
672 | (chip->id == CHIP_PM8607) ? chip->client : chip->companion; | |
673 | info->i2c_8606 = | |
674 | (chip->id == CHIP_PM8607) ? chip->companion : chip->client; | |
675 | if (!info->i2c_8606) { | |
676 | dev_err(&pdev->dev, "Missed I2C address of 88PM8606!\n"); | |
677 | ret = -EINVAL; | |
678 | goto out; | |
679 | } | |
680 | info->dev = &pdev->dev; | |
681 | ||
682 | /* set init value for the case we are not using battery */ | |
683 | set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_OVP_LOW); | |
684 | ||
685 | mutex_init(&info->lock); | |
686 | platform_set_drvdata(pdev, info); | |
687 | ||
688 | info->usb.name = "usb"; | |
689 | info->usb.type = POWER_SUPPLY_TYPE_USB; | |
690 | info->usb.supplied_to = pm860x_supplied_to; | |
691 | info->usb.num_supplicants = ARRAY_SIZE(pm860x_supplied_to); | |
692 | info->usb.properties = pm860x_usb_props; | |
693 | info->usb.num_properties = ARRAY_SIZE(pm860x_usb_props); | |
694 | info->usb.get_property = pm860x_usb_get_prop; | |
695 | ret = power_supply_register(&pdev->dev, &info->usb); | |
696 | if (ret) | |
697 | goto out; | |
698 | ||
699 | pm860x_init_charger(info); | |
700 | ||
701 | for (i = 0; i < ARRAY_SIZE(info->irq); i++) { | |
702 | ret = request_threaded_irq(info->irq[i], NULL, | |
703 | pm860x_irq_descs[i].handler, | |
704 | IRQF_ONESHOT, pm860x_irq_descs[i].name, info); | |
705 | if (ret < 0) { | |
706 | dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", | |
707 | info->irq[i], ret); | |
708 | goto out_irq; | |
709 | } | |
710 | } | |
711 | return 0; | |
712 | ||
713 | out_irq: | |
714 | while (--i >= 0) | |
715 | free_irq(info->irq[i], info); | |
716 | out: | |
a830d28b JZ |
717 | return ret; |
718 | } | |
719 | ||
415ec69f | 720 | static int pm860x_charger_remove(struct platform_device *pdev) |
a830d28b JZ |
721 | { |
722 | struct pm860x_charger_info *info = platform_get_drvdata(pdev); | |
723 | int i; | |
724 | ||
a830d28b JZ |
725 | power_supply_unregister(&info->usb); |
726 | free_irq(info->irq[0], info); | |
727 | for (i = 0; i < info->irq_nums; i++) | |
728 | free_irq(info->irq[i], info); | |
a830d28b JZ |
729 | return 0; |
730 | } | |
731 | ||
732 | static struct platform_driver pm860x_charger_driver = { | |
733 | .driver = { | |
734 | .name = "88pm860x-charger", | |
735 | .owner = THIS_MODULE, | |
736 | }, | |
737 | .probe = pm860x_charger_probe, | |
28ea73f4 | 738 | .remove = pm860x_charger_remove, |
a830d28b JZ |
739 | }; |
740 | module_platform_driver(pm860x_charger_driver); | |
741 | ||
742 | MODULE_DESCRIPTION("Marvell 88PM860x Charger driver"); | |
743 | MODULE_LICENSE("GPL"); |