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843735b7 RP |
1 | /* |
2 | * axp288_charger.c - X-power AXP288 PMIC Charger driver | |
3 | * | |
4 | * Copyright (C) 2014 Intel Corporation | |
5 | * Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
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 | ||
17 | #include <linux/module.h> | |
18 | #include <linux/device.h> | |
19 | #include <linux/regmap.h> | |
20 | #include <linux/workqueue.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/usb/otg.h> | |
24 | #include <linux/notifier.h> | |
25 | #include <linux/power_supply.h> | |
26 | #include <linux/notifier.h> | |
27 | #include <linux/property.h> | |
28 | #include <linux/mfd/axp20x.h> | |
29 | #include <linux/extcon.h> | |
30 | ||
31 | #define PS_STAT_VBUS_TRIGGER (1 << 0) | |
32 | #define PS_STAT_BAT_CHRG_DIR (1 << 2) | |
33 | #define PS_STAT_VBAT_ABOVE_VHOLD (1 << 3) | |
34 | #define PS_STAT_VBUS_VALID (1 << 4) | |
35 | #define PS_STAT_VBUS_PRESENT (1 << 5) | |
36 | ||
37 | #define CHRG_STAT_BAT_SAFE_MODE (1 << 3) | |
38 | #define CHRG_STAT_BAT_VALID (1 << 4) | |
39 | #define CHRG_STAT_BAT_PRESENT (1 << 5) | |
40 | #define CHRG_STAT_CHARGING (1 << 6) | |
41 | #define CHRG_STAT_PMIC_OTP (1 << 7) | |
42 | ||
43 | #define VBUS_ISPOUT_CUR_LIM_MASK 0x03 | |
44 | #define VBUS_ISPOUT_CUR_LIM_BIT_POS 0 | |
45 | #define VBUS_ISPOUT_CUR_LIM_900MA 0x0 /* 900mA */ | |
46 | #define VBUS_ISPOUT_CUR_LIM_1500MA 0x1 /* 1500mA */ | |
47 | #define VBUS_ISPOUT_CUR_LIM_2000MA 0x2 /* 2000mA */ | |
48 | #define VBUS_ISPOUT_CUR_NO_LIM 0x3 /* 2500mA */ | |
49 | #define VBUS_ISPOUT_VHOLD_SET_MASK 0x31 | |
50 | #define VBUS_ISPOUT_VHOLD_SET_BIT_POS 0x3 | |
51 | #define VBUS_ISPOUT_VHOLD_SET_OFFSET 4000 /* 4000mV */ | |
52 | #define VBUS_ISPOUT_VHOLD_SET_LSB_RES 100 /* 100mV */ | |
53 | #define VBUS_ISPOUT_VHOLD_SET_4300MV 0x3 /* 4300mV */ | |
54 | #define VBUS_ISPOUT_VBUS_PATH_DIS (1 << 7) | |
55 | ||
56 | #define CHRG_CCCV_CC_MASK 0xf /* 4 bits */ | |
57 | #define CHRG_CCCV_CC_BIT_POS 0 | |
58 | #define CHRG_CCCV_CC_OFFSET 200 /* 200mA */ | |
59 | #define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */ | |
60 | #define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */ | |
61 | #define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */ | |
62 | #define CHRG_CCCV_CV_BIT_POS 5 | |
63 | #define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */ | |
64 | #define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */ | |
65 | #define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */ | |
66 | #define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */ | |
67 | #define CHRG_CCCV_CHG_EN (1 << 7) | |
68 | ||
69 | #define CNTL2_CC_TIMEOUT_MASK 0x3 /* 2 bits */ | |
70 | #define CNTL2_CC_TIMEOUT_OFFSET 6 /* 6 Hrs */ | |
71 | #define CNTL2_CC_TIMEOUT_LSB_RES 2 /* 2 Hrs */ | |
72 | #define CNTL2_CC_TIMEOUT_12HRS 0x3 /* 12 Hrs */ | |
73 | #define CNTL2_CHGLED_TYPEB (1 << 4) | |
74 | #define CNTL2_CHG_OUT_TURNON (1 << 5) | |
75 | #define CNTL2_PC_TIMEOUT_MASK 0xC0 | |
76 | #define CNTL2_PC_TIMEOUT_OFFSET 40 /* 40 mins */ | |
77 | #define CNTL2_PC_TIMEOUT_LSB_RES 10 /* 10 mins */ | |
78 | #define CNTL2_PC_TIMEOUT_70MINS 0x3 | |
79 | ||
80 | #define CHRG_ILIM_TEMP_LOOP_EN (1 << 3) | |
81 | #define CHRG_VBUS_ILIM_MASK 0xf0 | |
82 | #define CHRG_VBUS_ILIM_BIT_POS 4 | |
83 | #define CHRG_VBUS_ILIM_100MA 0x0 /* 100mA */ | |
84 | #define CHRG_VBUS_ILIM_500MA 0x1 /* 500mA */ | |
85 | #define CHRG_VBUS_ILIM_900MA 0x2 /* 900mA */ | |
86 | #define CHRG_VBUS_ILIM_1500MA 0x3 /* 1500mA */ | |
87 | #define CHRG_VBUS_ILIM_2000MA 0x4 /* 2000mA */ | |
88 | #define CHRG_VBUS_ILIM_2500MA 0x5 /* 2500mA */ | |
89 | #define CHRG_VBUS_ILIM_3000MA 0x6 /* 3000mA */ | |
90 | ||
91 | #define CHRG_VLTFC_0C 0xA5 /* 0 DegC */ | |
92 | #define CHRG_VHTFC_45C 0x1F /* 45 DegC */ | |
93 | ||
94 | #define BAT_IRQ_CFG_CHRG_DONE (1 << 2) | |
95 | #define BAT_IRQ_CFG_CHRG_START (1 << 3) | |
96 | #define BAT_IRQ_CFG_BAT_SAFE_EXIT (1 << 4) | |
97 | #define BAT_IRQ_CFG_BAT_SAFE_ENTER (1 << 5) | |
98 | #define BAT_IRQ_CFG_BAT_DISCON (1 << 6) | |
99 | #define BAT_IRQ_CFG_BAT_CONN (1 << 7) | |
100 | #define BAT_IRQ_CFG_BAT_MASK 0xFC | |
101 | ||
102 | #define TEMP_IRQ_CFG_QCBTU (1 << 4) | |
103 | #define TEMP_IRQ_CFG_CBTU (1 << 5) | |
104 | #define TEMP_IRQ_CFG_QCBTO (1 << 6) | |
105 | #define TEMP_IRQ_CFG_CBTO (1 << 7) | |
106 | #define TEMP_IRQ_CFG_MASK 0xF0 | |
107 | ||
108 | #define FG_CNTL_OCV_ADJ_EN (1 << 3) | |
109 | ||
110 | #define CV_4100MV 4100 /* 4100mV */ | |
111 | #define CV_4150MV 4150 /* 4150mV */ | |
112 | #define CV_4200MV 4200 /* 4200mV */ | |
113 | #define CV_4350MV 4350 /* 4350mV */ | |
114 | ||
115 | #define CC_200MA 200 /* 200mA */ | |
116 | #define CC_600MA 600 /* 600mA */ | |
117 | #define CC_800MA 800 /* 800mA */ | |
118 | #define CC_1000MA 1000 /* 1000mA */ | |
119 | #define CC_1600MA 1600 /* 1600mA */ | |
120 | #define CC_2000MA 2000 /* 2000mA */ | |
121 | ||
122 | #define ILIM_100MA 100 /* 100mA */ | |
123 | #define ILIM_500MA 500 /* 500mA */ | |
124 | #define ILIM_900MA 900 /* 900mA */ | |
125 | #define ILIM_1500MA 1500 /* 1500mA */ | |
126 | #define ILIM_2000MA 2000 /* 2000mA */ | |
127 | #define ILIM_2500MA 2500 /* 2500mA */ | |
128 | #define ILIM_3000MA 3000 /* 3000mA */ | |
129 | ||
130 | #define AXP288_EXTCON_DEV_NAME "axp288_extcon" | |
131 | ||
132 | #define AXP288_EXTCON_SLOW_CHARGER "SLOW-CHARGER" | |
133 | #define AXP288_EXTCON_DOWNSTREAM_CHARGER "CHARGE-DOWNSTREAM" | |
134 | #define AXP288_EXTCON_FAST_CHARGER "FAST-CHARGER" | |
135 | ||
136 | enum { | |
137 | VBUS_OV_IRQ = 0, | |
138 | CHARGE_DONE_IRQ, | |
139 | CHARGE_CHARGING_IRQ, | |
140 | BAT_SAFE_QUIT_IRQ, | |
141 | BAT_SAFE_ENTER_IRQ, | |
142 | QCBTU_IRQ, | |
143 | CBTU_IRQ, | |
144 | QCBTO_IRQ, | |
145 | CBTO_IRQ, | |
146 | CHRG_INTR_END, | |
147 | }; | |
148 | ||
149 | struct axp288_chrg_info { | |
150 | struct platform_device *pdev; | |
151 | struct axp20x_chrg_pdata *pdata; | |
152 | struct regmap *regmap; | |
153 | struct regmap_irq_chip_data *regmap_irqc; | |
154 | int irq[CHRG_INTR_END]; | |
155 | struct power_supply *psy_usb; | |
156 | struct mutex lock; | |
157 | ||
158 | /* OTG/Host mode */ | |
159 | struct { | |
160 | struct work_struct work; | |
161 | struct extcon_specific_cable_nb cable; | |
162 | struct notifier_block id_nb; | |
163 | bool id_short; | |
164 | } otg; | |
165 | ||
166 | /* SDP/CDP/DCP USB charging cable notifications */ | |
167 | struct { | |
168 | struct extcon_dev *edev; | |
169 | bool connected; | |
170 | enum power_supply_type chg_type; | |
171 | struct notifier_block nb; | |
172 | struct work_struct work; | |
173 | } cable; | |
174 | ||
175 | int health; | |
176 | int inlmt; | |
177 | int cc; | |
178 | int cv; | |
179 | int max_cc; | |
180 | int max_cv; | |
181 | bool online; | |
182 | bool present; | |
183 | bool enable_charger; | |
184 | bool is_charger_enabled; | |
185 | }; | |
186 | ||
187 | static inline int axp288_charger_set_cc(struct axp288_chrg_info *info, int cc) | |
188 | { | |
189 | u8 reg_val; | |
190 | int ret; | |
191 | ||
192 | if (cc < CHRG_CCCV_CC_OFFSET) | |
193 | cc = CHRG_CCCV_CC_OFFSET; | |
194 | else if (cc > info->max_cc) | |
195 | cc = info->max_cc; | |
196 | ||
197 | reg_val = (cc - CHRG_CCCV_CC_OFFSET) / CHRG_CCCV_CC_LSB_RES; | |
198 | cc = (reg_val * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET; | |
199 | reg_val = reg_val << CHRG_CCCV_CC_BIT_POS; | |
200 | ||
201 | ret = regmap_update_bits(info->regmap, | |
202 | AXP20X_CHRG_CTRL1, | |
203 | CHRG_CCCV_CC_MASK, reg_val); | |
204 | if (ret >= 0) | |
205 | info->cc = cc; | |
206 | ||
207 | return ret; | |
208 | } | |
209 | ||
210 | static inline int axp288_charger_set_cv(struct axp288_chrg_info *info, int cv) | |
211 | { | |
212 | u8 reg_val; | |
213 | int ret; | |
214 | ||
215 | if (cv <= CV_4100MV) { | |
216 | reg_val = CHRG_CCCV_CV_4100MV; | |
217 | cv = CV_4100MV; | |
218 | } else if (cv <= CV_4150MV) { | |
219 | reg_val = CHRG_CCCV_CV_4150MV; | |
220 | cv = CV_4150MV; | |
221 | } else if (cv <= CV_4200MV) { | |
222 | reg_val = CHRG_CCCV_CV_4200MV; | |
223 | cv = CV_4200MV; | |
224 | } else { | |
225 | reg_val = CHRG_CCCV_CV_4350MV; | |
226 | cv = CV_4350MV; | |
227 | } | |
228 | ||
229 | reg_val = reg_val << CHRG_CCCV_CV_BIT_POS; | |
230 | ||
231 | ret = regmap_update_bits(info->regmap, | |
232 | AXP20X_CHRG_CTRL1, | |
233 | CHRG_CCCV_CV_MASK, reg_val); | |
234 | ||
235 | if (ret >= 0) | |
236 | info->cv = cv; | |
237 | ||
238 | return ret; | |
239 | } | |
240 | ||
241 | static inline int axp288_charger_set_vbus_inlmt(struct axp288_chrg_info *info, | |
242 | int inlmt) | |
243 | { | |
244 | int ret; | |
245 | unsigned int val; | |
246 | u8 reg_val; | |
247 | ||
248 | /* Read in limit register */ | |
249 | ret = regmap_read(info->regmap, AXP20X_CHRG_BAK_CTRL, &val); | |
250 | if (ret < 0) | |
251 | goto set_inlmt_fail; | |
252 | ||
253 | if (inlmt <= ILIM_100MA) { | |
254 | reg_val = CHRG_VBUS_ILIM_100MA; | |
255 | inlmt = ILIM_100MA; | |
256 | } else if (inlmt <= ILIM_500MA) { | |
257 | reg_val = CHRG_VBUS_ILIM_500MA; | |
258 | inlmt = ILIM_500MA; | |
259 | } else if (inlmt <= ILIM_900MA) { | |
260 | reg_val = CHRG_VBUS_ILIM_900MA; | |
261 | inlmt = ILIM_900MA; | |
262 | } else if (inlmt <= ILIM_1500MA) { | |
263 | reg_val = CHRG_VBUS_ILIM_1500MA; | |
264 | inlmt = ILIM_1500MA; | |
265 | } else if (inlmt <= ILIM_2000MA) { | |
266 | reg_val = CHRG_VBUS_ILIM_2000MA; | |
267 | inlmt = ILIM_2000MA; | |
268 | } else if (inlmt <= ILIM_2500MA) { | |
269 | reg_val = CHRG_VBUS_ILIM_2500MA; | |
270 | inlmt = ILIM_2500MA; | |
271 | } else { | |
272 | reg_val = CHRG_VBUS_ILIM_3000MA; | |
273 | inlmt = ILIM_3000MA; | |
274 | } | |
275 | ||
276 | reg_val = (val & ~CHRG_VBUS_ILIM_MASK) | |
277 | | (reg_val << CHRG_VBUS_ILIM_BIT_POS); | |
278 | ret = regmap_write(info->regmap, AXP20X_CHRG_BAK_CTRL, reg_val); | |
279 | if (ret >= 0) | |
280 | info->inlmt = inlmt; | |
281 | else | |
282 | dev_err(&info->pdev->dev, "charger BAK control %d\n", ret); | |
283 | ||
284 | ||
285 | set_inlmt_fail: | |
286 | return ret; | |
287 | } | |
288 | ||
289 | static int axp288_charger_vbus_path_select(struct axp288_chrg_info *info, | |
290 | bool enable) | |
291 | { | |
292 | int ret; | |
293 | ||
294 | if (enable) | |
295 | ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT, | |
296 | VBUS_ISPOUT_VBUS_PATH_DIS, 0); | |
297 | else | |
298 | ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT, | |
299 | VBUS_ISPOUT_VBUS_PATH_DIS, VBUS_ISPOUT_VBUS_PATH_DIS); | |
300 | ||
301 | if (ret < 0) | |
302 | dev_err(&info->pdev->dev, "axp288 vbus path select %d\n", ret); | |
303 | ||
304 | ||
305 | return ret; | |
306 | } | |
307 | ||
308 | static int axp288_charger_enable_charger(struct axp288_chrg_info *info, | |
309 | bool enable) | |
310 | { | |
311 | int ret; | |
312 | ||
313 | if (enable) | |
314 | ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1, | |
315 | CHRG_CCCV_CHG_EN, CHRG_CCCV_CHG_EN); | |
316 | else | |
317 | ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1, | |
318 | CHRG_CCCV_CHG_EN, 0); | |
319 | if (ret < 0) | |
320 | dev_err(&info->pdev->dev, "axp288 enable charger %d\n", ret); | |
321 | else | |
322 | info->is_charger_enabled = enable; | |
323 | ||
324 | return ret; | |
325 | } | |
326 | ||
327 | static int axp288_charger_is_present(struct axp288_chrg_info *info) | |
328 | { | |
329 | int ret, present = 0; | |
330 | unsigned int val; | |
331 | ||
332 | ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val); | |
333 | if (ret < 0) | |
334 | return ret; | |
335 | ||
336 | if (val & PS_STAT_VBUS_PRESENT) | |
337 | present = 1; | |
338 | return present; | |
339 | } | |
340 | ||
341 | static int axp288_charger_is_online(struct axp288_chrg_info *info) | |
342 | { | |
343 | int ret, online = 0; | |
344 | unsigned int val; | |
345 | ||
346 | ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val); | |
347 | if (ret < 0) | |
348 | return ret; | |
349 | ||
350 | if (val & PS_STAT_VBUS_VALID) | |
351 | online = 1; | |
352 | return online; | |
353 | } | |
354 | ||
355 | static int axp288_get_charger_health(struct axp288_chrg_info *info) | |
356 | { | |
357 | int ret, pwr_stat, chrg_stat; | |
358 | int health = POWER_SUPPLY_HEALTH_UNKNOWN; | |
359 | unsigned int val; | |
360 | ||
361 | ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val); | |
362 | if ((ret < 0) || !(val & PS_STAT_VBUS_PRESENT)) | |
363 | goto health_read_fail; | |
364 | else | |
365 | pwr_stat = val; | |
366 | ||
367 | ret = regmap_read(info->regmap, AXP20X_PWR_OP_MODE, &val); | |
368 | if (ret < 0) | |
369 | goto health_read_fail; | |
370 | else | |
371 | chrg_stat = val; | |
372 | ||
373 | if (!(pwr_stat & PS_STAT_VBUS_VALID)) | |
374 | health = POWER_SUPPLY_HEALTH_DEAD; | |
375 | else if (chrg_stat & CHRG_STAT_PMIC_OTP) | |
376 | health = POWER_SUPPLY_HEALTH_OVERHEAT; | |
377 | else if (chrg_stat & CHRG_STAT_BAT_SAFE_MODE) | |
378 | health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; | |
379 | else | |
380 | health = POWER_SUPPLY_HEALTH_GOOD; | |
381 | ||
382 | health_read_fail: | |
383 | return health; | |
384 | } | |
385 | ||
386 | static int axp288_charger_usb_set_property(struct power_supply *psy, | |
387 | enum power_supply_property psp, | |
388 | const union power_supply_propval *val) | |
389 | { | |
390 | struct axp288_chrg_info *info = power_supply_get_drvdata(psy); | |
391 | int ret = 0; | |
392 | int scaled_val; | |
393 | ||
394 | mutex_lock(&info->lock); | |
395 | ||
396 | switch (psp) { | |
397 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: | |
398 | scaled_val = min(val->intval, info->max_cc); | |
399 | scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000); | |
400 | ret = axp288_charger_set_cc(info, scaled_val); | |
401 | if (ret < 0) | |
402 | dev_warn(&info->pdev->dev, "set charge current failed\n"); | |
403 | break; | |
404 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: | |
405 | scaled_val = min(val->intval, info->max_cv); | |
406 | scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000); | |
407 | ret = axp288_charger_set_cv(info, scaled_val); | |
408 | if (ret < 0) | |
409 | dev_warn(&info->pdev->dev, "set charge voltage failed\n"); | |
410 | break; | |
411 | default: | |
412 | ret = -EINVAL; | |
413 | } | |
414 | ||
415 | mutex_unlock(&info->lock); | |
416 | return ret; | |
417 | } | |
418 | ||
419 | static int axp288_charger_usb_get_property(struct power_supply *psy, | |
420 | enum power_supply_property psp, | |
421 | union power_supply_propval *val) | |
422 | { | |
423 | struct axp288_chrg_info *info = power_supply_get_drvdata(psy); | |
424 | int ret = 0; | |
425 | ||
426 | mutex_lock(&info->lock); | |
427 | ||
428 | switch (psp) { | |
429 | case POWER_SUPPLY_PROP_PRESENT: | |
430 | /* Check for OTG case first */ | |
431 | if (info->otg.id_short) { | |
432 | val->intval = 0; | |
433 | break; | |
434 | } | |
435 | ret = axp288_charger_is_present(info); | |
436 | if (ret < 0) | |
437 | goto psy_get_prop_fail; | |
438 | info->present = ret; | |
439 | val->intval = info->present; | |
440 | break; | |
441 | case POWER_SUPPLY_PROP_ONLINE: | |
442 | /* Check for OTG case first */ | |
443 | if (info->otg.id_short) { | |
444 | val->intval = 0; | |
445 | break; | |
446 | } | |
447 | ret = axp288_charger_is_online(info); | |
448 | if (ret < 0) | |
449 | goto psy_get_prop_fail; | |
450 | info->online = ret; | |
451 | val->intval = info->online; | |
452 | break; | |
453 | case POWER_SUPPLY_PROP_HEALTH: | |
454 | val->intval = axp288_get_charger_health(info); | |
455 | break; | |
456 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: | |
457 | val->intval = info->cc * 1000; | |
458 | break; | |
459 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: | |
460 | val->intval = info->max_cc * 1000; | |
461 | break; | |
462 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: | |
463 | val->intval = info->cv * 1000; | |
464 | break; | |
465 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: | |
466 | val->intval = info->max_cv * 1000; | |
467 | break; | |
468 | case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: | |
469 | val->intval = info->inlmt * 1000; | |
470 | break; | |
471 | default: | |
472 | ret = -EINVAL; | |
473 | goto psy_get_prop_fail; | |
474 | } | |
475 | ||
476 | psy_get_prop_fail: | |
477 | mutex_unlock(&info->lock); | |
478 | return ret; | |
479 | } | |
480 | ||
481 | static int axp288_charger_property_is_writeable(struct power_supply *psy, | |
482 | enum power_supply_property psp) | |
483 | { | |
484 | int ret; | |
485 | ||
486 | switch (psp) { | |
487 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: | |
488 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: | |
489 | ret = 1; | |
490 | break; | |
491 | default: | |
492 | ret = 0; | |
493 | } | |
494 | ||
495 | return ret; | |
496 | } | |
497 | ||
498 | static enum power_supply_property axp288_usb_props[] = { | |
499 | POWER_SUPPLY_PROP_PRESENT, | |
500 | POWER_SUPPLY_PROP_ONLINE, | |
501 | POWER_SUPPLY_PROP_TYPE, | |
502 | POWER_SUPPLY_PROP_HEALTH, | |
503 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, | |
504 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, | |
505 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, | |
506 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, | |
507 | POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, | |
508 | }; | |
509 | ||
510 | static const struct power_supply_desc axp288_charger_desc = { | |
511 | .name = "axp288_charger", | |
512 | .type = POWER_SUPPLY_TYPE_USB, | |
513 | .properties = axp288_usb_props, | |
514 | .num_properties = ARRAY_SIZE(axp288_usb_props), | |
515 | .get_property = axp288_charger_usb_get_property, | |
516 | .set_property = axp288_charger_usb_set_property, | |
517 | .property_is_writeable = axp288_charger_property_is_writeable, | |
518 | }; | |
519 | ||
520 | static irqreturn_t axp288_charger_irq_thread_handler(int irq, void *dev) | |
521 | { | |
522 | struct axp288_chrg_info *info = dev; | |
523 | int i; | |
524 | ||
525 | for (i = 0; i < CHRG_INTR_END; i++) { | |
526 | if (info->irq[i] == irq) | |
527 | break; | |
528 | } | |
529 | ||
530 | if (i >= CHRG_INTR_END) { | |
531 | dev_warn(&info->pdev->dev, "spurious interrupt!!\n"); | |
532 | return IRQ_NONE; | |
533 | } | |
534 | ||
535 | switch (i) { | |
536 | case VBUS_OV_IRQ: | |
537 | dev_dbg(&info->pdev->dev, "VBUS Over Voltage INTR\n"); | |
538 | break; | |
539 | case CHARGE_DONE_IRQ: | |
540 | dev_dbg(&info->pdev->dev, "Charging Done INTR\n"); | |
541 | break; | |
542 | case CHARGE_CHARGING_IRQ: | |
543 | dev_dbg(&info->pdev->dev, "Start Charging IRQ\n"); | |
544 | break; | |
545 | case BAT_SAFE_QUIT_IRQ: | |
546 | dev_dbg(&info->pdev->dev, | |
547 | "Quit Safe Mode(restart timer) Charging IRQ\n"); | |
548 | break; | |
549 | case BAT_SAFE_ENTER_IRQ: | |
550 | dev_dbg(&info->pdev->dev, | |
551 | "Enter Safe Mode(timer expire) Charging IRQ\n"); | |
552 | break; | |
553 | case QCBTU_IRQ: | |
554 | dev_dbg(&info->pdev->dev, | |
555 | "Quit Battery Under Temperature(CHRG) INTR\n"); | |
556 | break; | |
557 | case CBTU_IRQ: | |
558 | dev_dbg(&info->pdev->dev, | |
559 | "Hit Battery Under Temperature(CHRG) INTR\n"); | |
560 | break; | |
561 | case QCBTO_IRQ: | |
562 | dev_dbg(&info->pdev->dev, | |
563 | "Quit Battery Over Temperature(CHRG) INTR\n"); | |
564 | break; | |
565 | case CBTO_IRQ: | |
566 | dev_dbg(&info->pdev->dev, | |
567 | "Hit Battery Over Temperature(CHRG) INTR\n"); | |
568 | break; | |
569 | default: | |
570 | dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n"); | |
571 | goto out; | |
572 | } | |
573 | ||
574 | power_supply_changed(info->psy_usb); | |
575 | out: | |
576 | return IRQ_HANDLED; | |
577 | } | |
578 | ||
579 | static void axp288_charger_extcon_evt_worker(struct work_struct *work) | |
580 | { | |
581 | struct axp288_chrg_info *info = | |
582 | container_of(work, struct axp288_chrg_info, cable.work); | |
583 | int ret, current_limit; | |
584 | bool changed = false; | |
585 | struct extcon_dev *edev = info->cable.edev; | |
586 | bool old_connected = info->cable.connected; | |
587 | ||
588 | /* Determine cable/charger type */ | |
589 | if (extcon_get_cable_state(edev, AXP288_EXTCON_SLOW_CHARGER) > 0) { | |
590 | dev_dbg(&info->pdev->dev, "USB SDP charger is connected"); | |
591 | info->cable.connected = true; | |
592 | info->cable.chg_type = POWER_SUPPLY_TYPE_USB; | |
593 | } else if (extcon_get_cable_state(edev, | |
594 | AXP288_EXTCON_DOWNSTREAM_CHARGER) > 0) { | |
595 | dev_dbg(&info->pdev->dev, "USB CDP charger is connected"); | |
596 | info->cable.connected = true; | |
597 | info->cable.chg_type = POWER_SUPPLY_TYPE_USB_CDP; | |
598 | } else if (extcon_get_cable_state(edev, | |
599 | AXP288_EXTCON_FAST_CHARGER) > 0) { | |
600 | dev_dbg(&info->pdev->dev, "USB DCP charger is connected"); | |
601 | info->cable.connected = true; | |
602 | info->cable.chg_type = POWER_SUPPLY_TYPE_USB_DCP; | |
603 | } else { | |
604 | if (old_connected) | |
605 | dev_dbg(&info->pdev->dev, "USB charger disconnected"); | |
606 | info->cable.connected = false; | |
607 | info->cable.chg_type = POWER_SUPPLY_TYPE_USB; | |
608 | } | |
609 | ||
610 | /* Cable status changed */ | |
611 | if (old_connected != info->cable.connected) | |
612 | changed = true; | |
613 | ||
614 | if (!changed) | |
615 | return; | |
616 | ||
617 | mutex_lock(&info->lock); | |
618 | ||
619 | if (info->is_charger_enabled && !info->cable.connected) { | |
620 | info->enable_charger = false; | |
621 | ret = axp288_charger_enable_charger(info, info->enable_charger); | |
622 | if (ret < 0) | |
623 | dev_err(&info->pdev->dev, | |
624 | "cannot disable charger (%d)", ret); | |
625 | ||
626 | } else if (!info->is_charger_enabled && info->cable.connected) { | |
627 | switch (info->cable.chg_type) { | |
628 | case POWER_SUPPLY_TYPE_USB: | |
629 | current_limit = ILIM_500MA; | |
630 | break; | |
631 | case POWER_SUPPLY_TYPE_USB_CDP: | |
632 | current_limit = ILIM_1500MA; | |
633 | break; | |
634 | case POWER_SUPPLY_TYPE_USB_DCP: | |
635 | current_limit = ILIM_2000MA; | |
636 | break; | |
637 | default: | |
638 | /* Unknown */ | |
639 | current_limit = 0; | |
640 | break; | |
641 | } | |
642 | ||
643 | /* Set vbus current limit first, then enable charger */ | |
644 | ret = axp288_charger_set_vbus_inlmt(info, current_limit); | |
645 | if (ret < 0) { | |
646 | dev_err(&info->pdev->dev, | |
647 | "error setting current limit (%d)", ret); | |
648 | } else { | |
649 | info->enable_charger = (current_limit > 0); | |
650 | ret = axp288_charger_enable_charger(info, | |
651 | info->enable_charger); | |
652 | if (ret < 0) | |
653 | dev_err(&info->pdev->dev, | |
654 | "cannot enable charger (%d)", ret); | |
655 | } | |
656 | } | |
657 | ||
658 | if (changed) | |
659 | info->health = axp288_get_charger_health(info); | |
660 | ||
661 | mutex_unlock(&info->lock); | |
662 | ||
663 | if (changed) | |
664 | power_supply_changed(info->psy_usb); | |
665 | } | |
666 | ||
667 | static int axp288_charger_handle_cable_evt(struct notifier_block *nb, | |
668 | unsigned long event, void *param) | |
669 | { | |
670 | struct axp288_chrg_info *info = | |
671 | container_of(nb, struct axp288_chrg_info, cable.nb); | |
672 | ||
673 | schedule_work(&info->cable.work); | |
674 | ||
675 | return NOTIFY_OK; | |
676 | } | |
677 | ||
678 | static void axp288_charger_otg_evt_worker(struct work_struct *work) | |
679 | { | |
680 | struct axp288_chrg_info *info = | |
681 | container_of(work, struct axp288_chrg_info, otg.work); | |
682 | int ret; | |
683 | ||
684 | /* Disable VBUS path before enabling the 5V boost */ | |
685 | ret = axp288_charger_vbus_path_select(info, !info->otg.id_short); | |
686 | if (ret < 0) | |
687 | dev_warn(&info->pdev->dev, "vbus path disable failed\n"); | |
688 | } | |
689 | ||
690 | static int axp288_charger_handle_otg_evt(struct notifier_block *nb, | |
691 | unsigned long event, void *param) | |
692 | { | |
693 | struct axp288_chrg_info *info = | |
694 | container_of(nb, struct axp288_chrg_info, otg.id_nb); | |
695 | struct extcon_dev *edev = param; | |
696 | int usb_host = extcon_get_cable_state(edev, "USB-Host"); | |
697 | ||
698 | dev_dbg(&info->pdev->dev, "external connector USB-Host is %s\n", | |
699 | usb_host ? "attached" : "detached"); | |
700 | ||
701 | /* | |
702 | * Set usb_id_short flag to avoid running charger detection logic | |
703 | * in case usb host. | |
704 | */ | |
705 | info->otg.id_short = usb_host; | |
706 | schedule_work(&info->otg.work); | |
707 | ||
708 | return NOTIFY_OK; | |
709 | } | |
710 | ||
711 | static void charger_init_hw_regs(struct axp288_chrg_info *info) | |
712 | { | |
713 | int ret, cc, cv; | |
714 | unsigned int val; | |
715 | ||
716 | /* Program temperature thresholds */ | |
717 | ret = regmap_write(info->regmap, AXP20X_V_LTF_CHRG, CHRG_VLTFC_0C); | |
718 | if (ret < 0) | |
719 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
720 | AXP20X_V_LTF_CHRG, ret); | |
721 | ||
722 | ret = regmap_write(info->regmap, AXP20X_V_HTF_CHRG, CHRG_VHTFC_45C); | |
723 | if (ret < 0) | |
724 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
725 | AXP20X_V_HTF_CHRG, ret); | |
726 | ||
727 | /* Do not turn-off charger o/p after charge cycle ends */ | |
728 | ret = regmap_update_bits(info->regmap, | |
729 | AXP20X_CHRG_CTRL2, | |
730 | CNTL2_CHG_OUT_TURNON, 1); | |
731 | if (ret < 0) | |
732 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
733 | AXP20X_CHRG_CTRL2, ret); | |
734 | ||
735 | /* Enable interrupts */ | |
736 | ret = regmap_update_bits(info->regmap, | |
737 | AXP20X_IRQ2_EN, | |
738 | BAT_IRQ_CFG_BAT_MASK, 1); | |
739 | if (ret < 0) | |
740 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
741 | AXP20X_IRQ2_EN, ret); | |
742 | ||
743 | ret = regmap_update_bits(info->regmap, AXP20X_IRQ3_EN, | |
744 | TEMP_IRQ_CFG_MASK, 1); | |
745 | if (ret < 0) | |
746 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
747 | AXP20X_IRQ3_EN, ret); | |
748 | ||
749 | /* Setup ending condition for charging to be 10% of I(chrg) */ | |
750 | ret = regmap_update_bits(info->regmap, | |
751 | AXP20X_CHRG_CTRL1, | |
752 | CHRG_CCCV_ITERM_20P, 0); | |
753 | if (ret < 0) | |
754 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
755 | AXP20X_CHRG_CTRL1, ret); | |
756 | ||
757 | /* Disable OCV-SOC curve calibration */ | |
758 | ret = regmap_update_bits(info->regmap, | |
759 | AXP20X_CC_CTRL, | |
760 | FG_CNTL_OCV_ADJ_EN, 0); | |
761 | if (ret < 0) | |
762 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
763 | AXP20X_CC_CTRL, ret); | |
764 | ||
765 | /* Init charging current and voltage */ | |
766 | info->max_cc = info->pdata->max_cc; | |
767 | info->max_cv = info->pdata->max_cv; | |
768 | ||
769 | /* Read current charge voltage and current limit */ | |
770 | ret = regmap_read(info->regmap, AXP20X_CHRG_CTRL1, &val); | |
771 | if (ret < 0) { | |
772 | /* Assume default if cannot read */ | |
773 | info->cc = info->pdata->def_cc; | |
774 | info->cv = info->pdata->def_cv; | |
775 | } else { | |
776 | /* Determine charge voltage */ | |
777 | cv = (val & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS; | |
778 | switch (cv) { | |
779 | case CHRG_CCCV_CV_4100MV: | |
780 | info->cv = CV_4100MV; | |
781 | break; | |
782 | case CHRG_CCCV_CV_4150MV: | |
783 | info->cv = CV_4150MV; | |
784 | break; | |
785 | case CHRG_CCCV_CV_4200MV: | |
786 | info->cv = CV_4200MV; | |
787 | break; | |
788 | case CHRG_CCCV_CV_4350MV: | |
789 | info->cv = CV_4350MV; | |
790 | break; | |
791 | default: | |
792 | info->cv = INT_MAX; | |
793 | break; | |
794 | } | |
795 | ||
796 | /* Determine charge current limit */ | |
797 | cc = (ret & CHRG_CCCV_CC_MASK) >> CHRG_CCCV_CC_BIT_POS; | |
798 | cc = (cc * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET; | |
799 | info->cc = cc; | |
800 | ||
801 | /* Program default charging voltage and current */ | |
802 | cc = min(info->pdata->def_cc, info->max_cc); | |
803 | cv = min(info->pdata->def_cv, info->max_cv); | |
804 | ||
805 | ret = axp288_charger_set_cc(info, cc); | |
806 | if (ret < 0) | |
807 | dev_warn(&info->pdev->dev, | |
808 | "error(%d) in setting CC\n", ret); | |
809 | ||
810 | ret = axp288_charger_set_cv(info, cv); | |
811 | if (ret < 0) | |
812 | dev_warn(&info->pdev->dev, | |
813 | "error(%d) in setting CV\n", ret); | |
814 | } | |
815 | } | |
816 | ||
817 | static int axp288_charger_probe(struct platform_device *pdev) | |
818 | { | |
819 | int ret, i, pirq; | |
820 | struct axp288_chrg_info *info; | |
821 | struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); | |
822 | struct power_supply_config charger_cfg = {}; | |
823 | ||
824 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
825 | if (!info) | |
826 | return -ENOMEM; | |
827 | ||
828 | info->pdev = pdev; | |
829 | info->regmap = axp20x->regmap; | |
830 | info->regmap_irqc = axp20x->regmap_irqc; | |
831 | info->pdata = pdev->dev.platform_data; | |
832 | ||
833 | if (!info->pdata) { | |
834 | /* Try ACPI provided pdata via device properties */ | |
835 | if (!device_property_present(&pdev->dev, | |
836 | "axp288_charger_data\n")) | |
837 | dev_err(&pdev->dev, "failed to get platform data\n"); | |
838 | return -ENODEV; | |
839 | } | |
840 | ||
841 | info->cable.edev = extcon_get_extcon_dev(AXP288_EXTCON_DEV_NAME); | |
842 | if (info->cable.edev == NULL) { | |
843 | dev_dbg(&pdev->dev, "%s is not ready, probe deferred\n", | |
844 | AXP288_EXTCON_DEV_NAME); | |
845 | return -EPROBE_DEFER; | |
846 | } | |
847 | ||
848 | /* Register for extcon notification */ | |
849 | INIT_WORK(&info->cable.work, axp288_charger_extcon_evt_worker); | |
850 | info->cable.nb.notifier_call = axp288_charger_handle_cable_evt; | |
4b703b1d | 851 | ret = extcon_register_notifier(info->cable.edev, EXTCON_NONE, &info->cable.nb); |
843735b7 RP |
852 | if (ret) { |
853 | dev_err(&info->pdev->dev, | |
854 | "failed to register extcon notifier %d\n", ret); | |
855 | return ret; | |
856 | } | |
857 | ||
858 | platform_set_drvdata(pdev, info); | |
859 | mutex_init(&info->lock); | |
860 | ||
861 | /* Register with power supply class */ | |
862 | charger_cfg.drv_data = info; | |
863 | info->psy_usb = power_supply_register(&pdev->dev, &axp288_charger_desc, | |
864 | &charger_cfg); | |
865 | if (IS_ERR(info->psy_usb)) { | |
866 | dev_err(&pdev->dev, "failed to register power supply charger\n"); | |
867 | ret = PTR_ERR(info->psy_usb); | |
868 | goto psy_reg_failed; | |
869 | } | |
870 | ||
871 | /* Register for OTG notification */ | |
872 | INIT_WORK(&info->otg.work, axp288_charger_otg_evt_worker); | |
873 | info->otg.id_nb.notifier_call = axp288_charger_handle_otg_evt; | |
874 | ret = extcon_register_interest(&info->otg.cable, NULL, "USB-Host", | |
875 | &info->otg.id_nb); | |
876 | if (ret) | |
877 | dev_warn(&pdev->dev, "failed to register otg notifier\n"); | |
878 | ||
879 | if (info->otg.cable.edev) | |
880 | info->otg.id_short = extcon_get_cable_state( | |
881 | info->otg.cable.edev, "USB-Host"); | |
882 | ||
883 | /* Register charger interrupts */ | |
884 | for (i = 0; i < CHRG_INTR_END; i++) { | |
885 | pirq = platform_get_irq(info->pdev, i); | |
886 | info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq); | |
887 | if (info->irq[i] < 0) { | |
888 | dev_warn(&info->pdev->dev, | |
889 | "failed to get virtual interrupt=%d\n", pirq); | |
890 | ret = info->irq[i]; | |
891 | goto intr_reg_failed; | |
892 | } | |
893 | ret = devm_request_threaded_irq(&info->pdev->dev, info->irq[i], | |
894 | NULL, axp288_charger_irq_thread_handler, | |
895 | IRQF_ONESHOT, info->pdev->name, info); | |
896 | if (ret) { | |
897 | dev_err(&pdev->dev, "failed to request interrupt=%d\n", | |
898 | info->irq[i]); | |
899 | goto intr_reg_failed; | |
900 | } | |
901 | } | |
902 | ||
903 | charger_init_hw_regs(info); | |
904 | ||
905 | return 0; | |
906 | ||
907 | intr_reg_failed: | |
908 | if (info->otg.cable.edev) | |
909 | extcon_unregister_interest(&info->otg.cable); | |
910 | power_supply_unregister(info->psy_usb); | |
911 | psy_reg_failed: | |
4b703b1d | 912 | extcon_unregister_notifier(info->cable.edev, EXTCON_NONE, &info->cable.nb); |
843735b7 RP |
913 | return ret; |
914 | } | |
915 | ||
916 | static int axp288_charger_remove(struct platform_device *pdev) | |
917 | { | |
918 | struct axp288_chrg_info *info = dev_get_drvdata(&pdev->dev); | |
919 | ||
920 | if (info->otg.cable.edev) | |
921 | extcon_unregister_interest(&info->otg.cable); | |
922 | ||
4b703b1d | 923 | extcon_unregister_notifier(info->cable.edev, EXTCON_NONE, &info->cable.nb); |
843735b7 RP |
924 | power_supply_unregister(info->psy_usb); |
925 | ||
926 | return 0; | |
927 | } | |
928 | ||
929 | static struct platform_driver axp288_charger_driver = { | |
930 | .probe = axp288_charger_probe, | |
931 | .remove = axp288_charger_remove, | |
932 | .driver = { | |
933 | .name = "axp288_charger", | |
934 | }, | |
935 | }; | |
936 | ||
937 | module_platform_driver(axp288_charger_driver); | |
938 | ||
939 | MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>"); | |
940 | MODULE_DESCRIPTION("X-power AXP288 Charger Driver"); | |
941 | MODULE_LICENSE("GPL v2"); |