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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> | |
843735b7 RP |
26 | #include <linux/property.h> |
27 | #include <linux/mfd/axp20x.h> | |
28 | #include <linux/extcon.h> | |
29 | ||
30 | #define PS_STAT_VBUS_TRIGGER (1 << 0) | |
31 | #define PS_STAT_BAT_CHRG_DIR (1 << 2) | |
32 | #define PS_STAT_VBAT_ABOVE_VHOLD (1 << 3) | |
33 | #define PS_STAT_VBUS_VALID (1 << 4) | |
34 | #define PS_STAT_VBUS_PRESENT (1 << 5) | |
35 | ||
36 | #define CHRG_STAT_BAT_SAFE_MODE (1 << 3) | |
37 | #define CHRG_STAT_BAT_VALID (1 << 4) | |
38 | #define CHRG_STAT_BAT_PRESENT (1 << 5) | |
39 | #define CHRG_STAT_CHARGING (1 << 6) | |
40 | #define CHRG_STAT_PMIC_OTP (1 << 7) | |
41 | ||
42 | #define VBUS_ISPOUT_CUR_LIM_MASK 0x03 | |
43 | #define VBUS_ISPOUT_CUR_LIM_BIT_POS 0 | |
44 | #define VBUS_ISPOUT_CUR_LIM_900MA 0x0 /* 900mA */ | |
45 | #define VBUS_ISPOUT_CUR_LIM_1500MA 0x1 /* 1500mA */ | |
46 | #define VBUS_ISPOUT_CUR_LIM_2000MA 0x2 /* 2000mA */ | |
47 | #define VBUS_ISPOUT_CUR_NO_LIM 0x3 /* 2500mA */ | |
48 | #define VBUS_ISPOUT_VHOLD_SET_MASK 0x31 | |
49 | #define VBUS_ISPOUT_VHOLD_SET_BIT_POS 0x3 | |
50 | #define VBUS_ISPOUT_VHOLD_SET_OFFSET 4000 /* 4000mV */ | |
51 | #define VBUS_ISPOUT_VHOLD_SET_LSB_RES 100 /* 100mV */ | |
52 | #define VBUS_ISPOUT_VHOLD_SET_4300MV 0x3 /* 4300mV */ | |
53 | #define VBUS_ISPOUT_VBUS_PATH_DIS (1 << 7) | |
54 | ||
55 | #define CHRG_CCCV_CC_MASK 0xf /* 4 bits */ | |
56 | #define CHRG_CCCV_CC_BIT_POS 0 | |
57 | #define CHRG_CCCV_CC_OFFSET 200 /* 200mA */ | |
58 | #define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */ | |
59 | #define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */ | |
60 | #define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */ | |
61 | #define CHRG_CCCV_CV_BIT_POS 5 | |
62 | #define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */ | |
63 | #define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */ | |
64 | #define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */ | |
65 | #define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */ | |
66 | #define CHRG_CCCV_CHG_EN (1 << 7) | |
67 | ||
68 | #define CNTL2_CC_TIMEOUT_MASK 0x3 /* 2 bits */ | |
69 | #define CNTL2_CC_TIMEOUT_OFFSET 6 /* 6 Hrs */ | |
70 | #define CNTL2_CC_TIMEOUT_LSB_RES 2 /* 2 Hrs */ | |
71 | #define CNTL2_CC_TIMEOUT_12HRS 0x3 /* 12 Hrs */ | |
72 | #define CNTL2_CHGLED_TYPEB (1 << 4) | |
73 | #define CNTL2_CHG_OUT_TURNON (1 << 5) | |
74 | #define CNTL2_PC_TIMEOUT_MASK 0xC0 | |
75 | #define CNTL2_PC_TIMEOUT_OFFSET 40 /* 40 mins */ | |
76 | #define CNTL2_PC_TIMEOUT_LSB_RES 10 /* 10 mins */ | |
77 | #define CNTL2_PC_TIMEOUT_70MINS 0x3 | |
78 | ||
79 | #define CHRG_ILIM_TEMP_LOOP_EN (1 << 3) | |
80 | #define CHRG_VBUS_ILIM_MASK 0xf0 | |
81 | #define CHRG_VBUS_ILIM_BIT_POS 4 | |
82 | #define CHRG_VBUS_ILIM_100MA 0x0 /* 100mA */ | |
83 | #define CHRG_VBUS_ILIM_500MA 0x1 /* 500mA */ | |
84 | #define CHRG_VBUS_ILIM_900MA 0x2 /* 900mA */ | |
85 | #define CHRG_VBUS_ILIM_1500MA 0x3 /* 1500mA */ | |
86 | #define CHRG_VBUS_ILIM_2000MA 0x4 /* 2000mA */ | |
87 | #define CHRG_VBUS_ILIM_2500MA 0x5 /* 2500mA */ | |
88 | #define CHRG_VBUS_ILIM_3000MA 0x6 /* 3000mA */ | |
89 | ||
90 | #define CHRG_VLTFC_0C 0xA5 /* 0 DegC */ | |
91 | #define CHRG_VHTFC_45C 0x1F /* 45 DegC */ | |
92 | ||
93 | #define BAT_IRQ_CFG_CHRG_DONE (1 << 2) | |
94 | #define BAT_IRQ_CFG_CHRG_START (1 << 3) | |
95 | #define BAT_IRQ_CFG_BAT_SAFE_EXIT (1 << 4) | |
96 | #define BAT_IRQ_CFG_BAT_SAFE_ENTER (1 << 5) | |
97 | #define BAT_IRQ_CFG_BAT_DISCON (1 << 6) | |
98 | #define BAT_IRQ_CFG_BAT_CONN (1 << 7) | |
99 | #define BAT_IRQ_CFG_BAT_MASK 0xFC | |
100 | ||
101 | #define TEMP_IRQ_CFG_QCBTU (1 << 4) | |
102 | #define TEMP_IRQ_CFG_CBTU (1 << 5) | |
103 | #define TEMP_IRQ_CFG_QCBTO (1 << 6) | |
104 | #define TEMP_IRQ_CFG_CBTO (1 << 7) | |
105 | #define TEMP_IRQ_CFG_MASK 0xF0 | |
106 | ||
107 | #define FG_CNTL_OCV_ADJ_EN (1 << 3) | |
108 | ||
109 | #define CV_4100MV 4100 /* 4100mV */ | |
110 | #define CV_4150MV 4150 /* 4150mV */ | |
111 | #define CV_4200MV 4200 /* 4200mV */ | |
112 | #define CV_4350MV 4350 /* 4350mV */ | |
113 | ||
114 | #define CC_200MA 200 /* 200mA */ | |
115 | #define CC_600MA 600 /* 600mA */ | |
116 | #define CC_800MA 800 /* 800mA */ | |
117 | #define CC_1000MA 1000 /* 1000mA */ | |
118 | #define CC_1600MA 1600 /* 1600mA */ | |
119 | #define CC_2000MA 2000 /* 2000mA */ | |
120 | ||
121 | #define ILIM_100MA 100 /* 100mA */ | |
122 | #define ILIM_500MA 500 /* 500mA */ | |
123 | #define ILIM_900MA 900 /* 900mA */ | |
124 | #define ILIM_1500MA 1500 /* 1500mA */ | |
125 | #define ILIM_2000MA 2000 /* 2000mA */ | |
126 | #define ILIM_2500MA 2500 /* 2500mA */ | |
127 | #define ILIM_3000MA 3000 /* 3000mA */ | |
128 | ||
129 | #define AXP288_EXTCON_DEV_NAME "axp288_extcon" | |
130 | ||
843735b7 RP |
131 | enum { |
132 | VBUS_OV_IRQ = 0, | |
133 | CHARGE_DONE_IRQ, | |
134 | CHARGE_CHARGING_IRQ, | |
135 | BAT_SAFE_QUIT_IRQ, | |
136 | BAT_SAFE_ENTER_IRQ, | |
137 | QCBTU_IRQ, | |
138 | CBTU_IRQ, | |
139 | QCBTO_IRQ, | |
140 | CBTO_IRQ, | |
141 | CHRG_INTR_END, | |
142 | }; | |
143 | ||
144 | struct axp288_chrg_info { | |
145 | struct platform_device *pdev; | |
146 | struct axp20x_chrg_pdata *pdata; | |
147 | struct regmap *regmap; | |
148 | struct regmap_irq_chip_data *regmap_irqc; | |
149 | int irq[CHRG_INTR_END]; | |
150 | struct power_supply *psy_usb; | |
151 | struct mutex lock; | |
152 | ||
153 | /* OTG/Host mode */ | |
154 | struct { | |
155 | struct work_struct work; | |
b396cff5 | 156 | struct extcon_dev *cable; |
843735b7 RP |
157 | struct notifier_block id_nb; |
158 | bool id_short; | |
159 | } otg; | |
160 | ||
161 | /* SDP/CDP/DCP USB charging cable notifications */ | |
162 | struct { | |
163 | struct extcon_dev *edev; | |
164 | bool connected; | |
165 | enum power_supply_type chg_type; | |
166 | struct notifier_block nb; | |
167 | struct work_struct work; | |
168 | } cable; | |
169 | ||
170 | int health; | |
171 | int inlmt; | |
172 | int cc; | |
173 | int cv; | |
174 | int max_cc; | |
175 | int max_cv; | |
176 | bool online; | |
177 | bool present; | |
178 | bool enable_charger; | |
179 | bool is_charger_enabled; | |
180 | }; | |
181 | ||
182 | static inline int axp288_charger_set_cc(struct axp288_chrg_info *info, int cc) | |
183 | { | |
184 | u8 reg_val; | |
185 | int ret; | |
186 | ||
187 | if (cc < CHRG_CCCV_CC_OFFSET) | |
188 | cc = CHRG_CCCV_CC_OFFSET; | |
189 | else if (cc > info->max_cc) | |
190 | cc = info->max_cc; | |
191 | ||
192 | reg_val = (cc - CHRG_CCCV_CC_OFFSET) / CHRG_CCCV_CC_LSB_RES; | |
193 | cc = (reg_val * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET; | |
194 | reg_val = reg_val << CHRG_CCCV_CC_BIT_POS; | |
195 | ||
196 | ret = regmap_update_bits(info->regmap, | |
197 | AXP20X_CHRG_CTRL1, | |
198 | CHRG_CCCV_CC_MASK, reg_val); | |
199 | if (ret >= 0) | |
200 | info->cc = cc; | |
201 | ||
202 | return ret; | |
203 | } | |
204 | ||
205 | static inline int axp288_charger_set_cv(struct axp288_chrg_info *info, int cv) | |
206 | { | |
207 | u8 reg_val; | |
208 | int ret; | |
209 | ||
210 | if (cv <= CV_4100MV) { | |
211 | reg_val = CHRG_CCCV_CV_4100MV; | |
212 | cv = CV_4100MV; | |
213 | } else if (cv <= CV_4150MV) { | |
214 | reg_val = CHRG_CCCV_CV_4150MV; | |
215 | cv = CV_4150MV; | |
216 | } else if (cv <= CV_4200MV) { | |
217 | reg_val = CHRG_CCCV_CV_4200MV; | |
218 | cv = CV_4200MV; | |
219 | } else { | |
220 | reg_val = CHRG_CCCV_CV_4350MV; | |
221 | cv = CV_4350MV; | |
222 | } | |
223 | ||
224 | reg_val = reg_val << CHRG_CCCV_CV_BIT_POS; | |
225 | ||
226 | ret = regmap_update_bits(info->regmap, | |
227 | AXP20X_CHRG_CTRL1, | |
228 | CHRG_CCCV_CV_MASK, reg_val); | |
229 | ||
230 | if (ret >= 0) | |
231 | info->cv = cv; | |
232 | ||
233 | return ret; | |
234 | } | |
235 | ||
236 | static inline int axp288_charger_set_vbus_inlmt(struct axp288_chrg_info *info, | |
237 | int inlmt) | |
238 | { | |
239 | int ret; | |
240 | unsigned int val; | |
241 | u8 reg_val; | |
242 | ||
243 | /* Read in limit register */ | |
244 | ret = regmap_read(info->regmap, AXP20X_CHRG_BAK_CTRL, &val); | |
245 | if (ret < 0) | |
246 | goto set_inlmt_fail; | |
247 | ||
248 | if (inlmt <= ILIM_100MA) { | |
249 | reg_val = CHRG_VBUS_ILIM_100MA; | |
250 | inlmt = ILIM_100MA; | |
251 | } else if (inlmt <= ILIM_500MA) { | |
252 | reg_val = CHRG_VBUS_ILIM_500MA; | |
253 | inlmt = ILIM_500MA; | |
254 | } else if (inlmt <= ILIM_900MA) { | |
255 | reg_val = CHRG_VBUS_ILIM_900MA; | |
256 | inlmt = ILIM_900MA; | |
257 | } else if (inlmt <= ILIM_1500MA) { | |
258 | reg_val = CHRG_VBUS_ILIM_1500MA; | |
259 | inlmt = ILIM_1500MA; | |
260 | } else if (inlmt <= ILIM_2000MA) { | |
261 | reg_val = CHRG_VBUS_ILIM_2000MA; | |
262 | inlmt = ILIM_2000MA; | |
263 | } else if (inlmt <= ILIM_2500MA) { | |
264 | reg_val = CHRG_VBUS_ILIM_2500MA; | |
265 | inlmt = ILIM_2500MA; | |
266 | } else { | |
267 | reg_val = CHRG_VBUS_ILIM_3000MA; | |
268 | inlmt = ILIM_3000MA; | |
269 | } | |
270 | ||
271 | reg_val = (val & ~CHRG_VBUS_ILIM_MASK) | |
272 | | (reg_val << CHRG_VBUS_ILIM_BIT_POS); | |
273 | ret = regmap_write(info->regmap, AXP20X_CHRG_BAK_CTRL, reg_val); | |
274 | if (ret >= 0) | |
275 | info->inlmt = inlmt; | |
276 | else | |
277 | dev_err(&info->pdev->dev, "charger BAK control %d\n", ret); | |
278 | ||
279 | ||
280 | set_inlmt_fail: | |
281 | return ret; | |
282 | } | |
283 | ||
284 | static int axp288_charger_vbus_path_select(struct axp288_chrg_info *info, | |
285 | bool enable) | |
286 | { | |
287 | int ret; | |
288 | ||
289 | if (enable) | |
290 | ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT, | |
291 | VBUS_ISPOUT_VBUS_PATH_DIS, 0); | |
292 | else | |
293 | ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT, | |
294 | VBUS_ISPOUT_VBUS_PATH_DIS, VBUS_ISPOUT_VBUS_PATH_DIS); | |
295 | ||
296 | if (ret < 0) | |
297 | dev_err(&info->pdev->dev, "axp288 vbus path select %d\n", ret); | |
298 | ||
299 | ||
300 | return ret; | |
301 | } | |
302 | ||
303 | static int axp288_charger_enable_charger(struct axp288_chrg_info *info, | |
304 | bool enable) | |
305 | { | |
306 | int ret; | |
307 | ||
308 | if (enable) | |
309 | ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1, | |
310 | CHRG_CCCV_CHG_EN, CHRG_CCCV_CHG_EN); | |
311 | else | |
312 | ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1, | |
313 | CHRG_CCCV_CHG_EN, 0); | |
314 | if (ret < 0) | |
315 | dev_err(&info->pdev->dev, "axp288 enable charger %d\n", ret); | |
316 | else | |
317 | info->is_charger_enabled = enable; | |
318 | ||
319 | return ret; | |
320 | } | |
321 | ||
322 | static int axp288_charger_is_present(struct axp288_chrg_info *info) | |
323 | { | |
324 | int ret, present = 0; | |
325 | unsigned int val; | |
326 | ||
327 | ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val); | |
328 | if (ret < 0) | |
329 | return ret; | |
330 | ||
331 | if (val & PS_STAT_VBUS_PRESENT) | |
332 | present = 1; | |
333 | return present; | |
334 | } | |
335 | ||
336 | static int axp288_charger_is_online(struct axp288_chrg_info *info) | |
337 | { | |
338 | int ret, online = 0; | |
339 | unsigned int val; | |
340 | ||
341 | ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val); | |
342 | if (ret < 0) | |
343 | return ret; | |
344 | ||
345 | if (val & PS_STAT_VBUS_VALID) | |
346 | online = 1; | |
347 | return online; | |
348 | } | |
349 | ||
350 | static int axp288_get_charger_health(struct axp288_chrg_info *info) | |
351 | { | |
352 | int ret, pwr_stat, chrg_stat; | |
353 | int health = POWER_SUPPLY_HEALTH_UNKNOWN; | |
354 | unsigned int val; | |
355 | ||
356 | ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val); | |
357 | if ((ret < 0) || !(val & PS_STAT_VBUS_PRESENT)) | |
358 | goto health_read_fail; | |
359 | else | |
360 | pwr_stat = val; | |
361 | ||
362 | ret = regmap_read(info->regmap, AXP20X_PWR_OP_MODE, &val); | |
363 | if (ret < 0) | |
364 | goto health_read_fail; | |
365 | else | |
366 | chrg_stat = val; | |
367 | ||
368 | if (!(pwr_stat & PS_STAT_VBUS_VALID)) | |
369 | health = POWER_SUPPLY_HEALTH_DEAD; | |
370 | else if (chrg_stat & CHRG_STAT_PMIC_OTP) | |
371 | health = POWER_SUPPLY_HEALTH_OVERHEAT; | |
372 | else if (chrg_stat & CHRG_STAT_BAT_SAFE_MODE) | |
373 | health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; | |
374 | else | |
375 | health = POWER_SUPPLY_HEALTH_GOOD; | |
376 | ||
377 | health_read_fail: | |
378 | return health; | |
379 | } | |
380 | ||
381 | static int axp288_charger_usb_set_property(struct power_supply *psy, | |
382 | enum power_supply_property psp, | |
383 | const union power_supply_propval *val) | |
384 | { | |
385 | struct axp288_chrg_info *info = power_supply_get_drvdata(psy); | |
386 | int ret = 0; | |
387 | int scaled_val; | |
388 | ||
389 | mutex_lock(&info->lock); | |
390 | ||
391 | switch (psp) { | |
392 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: | |
393 | scaled_val = min(val->intval, info->max_cc); | |
394 | scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000); | |
395 | ret = axp288_charger_set_cc(info, scaled_val); | |
396 | if (ret < 0) | |
397 | dev_warn(&info->pdev->dev, "set charge current failed\n"); | |
398 | break; | |
399 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: | |
400 | scaled_val = min(val->intval, info->max_cv); | |
401 | scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000); | |
402 | ret = axp288_charger_set_cv(info, scaled_val); | |
403 | if (ret < 0) | |
404 | dev_warn(&info->pdev->dev, "set charge voltage failed\n"); | |
405 | break; | |
406 | default: | |
407 | ret = -EINVAL; | |
408 | } | |
409 | ||
410 | mutex_unlock(&info->lock); | |
411 | return ret; | |
412 | } | |
413 | ||
414 | static int axp288_charger_usb_get_property(struct power_supply *psy, | |
415 | enum power_supply_property psp, | |
416 | union power_supply_propval *val) | |
417 | { | |
418 | struct axp288_chrg_info *info = power_supply_get_drvdata(psy); | |
419 | int ret = 0; | |
420 | ||
421 | mutex_lock(&info->lock); | |
422 | ||
423 | switch (psp) { | |
424 | case POWER_SUPPLY_PROP_PRESENT: | |
425 | /* Check for OTG case first */ | |
426 | if (info->otg.id_short) { | |
427 | val->intval = 0; | |
428 | break; | |
429 | } | |
430 | ret = axp288_charger_is_present(info); | |
431 | if (ret < 0) | |
432 | goto psy_get_prop_fail; | |
433 | info->present = ret; | |
434 | val->intval = info->present; | |
435 | break; | |
436 | case POWER_SUPPLY_PROP_ONLINE: | |
437 | /* Check for OTG case first */ | |
438 | if (info->otg.id_short) { | |
439 | val->intval = 0; | |
440 | break; | |
441 | } | |
442 | ret = axp288_charger_is_online(info); | |
443 | if (ret < 0) | |
444 | goto psy_get_prop_fail; | |
445 | info->online = ret; | |
446 | val->intval = info->online; | |
447 | break; | |
448 | case POWER_SUPPLY_PROP_HEALTH: | |
449 | val->intval = axp288_get_charger_health(info); | |
450 | break; | |
451 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: | |
452 | val->intval = info->cc * 1000; | |
453 | break; | |
454 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: | |
455 | val->intval = info->max_cc * 1000; | |
456 | break; | |
457 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: | |
458 | val->intval = info->cv * 1000; | |
459 | break; | |
460 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: | |
461 | val->intval = info->max_cv * 1000; | |
462 | break; | |
463 | case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: | |
464 | val->intval = info->inlmt * 1000; | |
465 | break; | |
466 | default: | |
467 | ret = -EINVAL; | |
468 | goto psy_get_prop_fail; | |
469 | } | |
470 | ||
471 | psy_get_prop_fail: | |
472 | mutex_unlock(&info->lock); | |
473 | return ret; | |
474 | } | |
475 | ||
476 | static int axp288_charger_property_is_writeable(struct power_supply *psy, | |
477 | enum power_supply_property psp) | |
478 | { | |
479 | int ret; | |
480 | ||
481 | switch (psp) { | |
482 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: | |
483 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: | |
484 | ret = 1; | |
485 | break; | |
486 | default: | |
487 | ret = 0; | |
488 | } | |
489 | ||
490 | return ret; | |
491 | } | |
492 | ||
493 | static enum power_supply_property axp288_usb_props[] = { | |
494 | POWER_SUPPLY_PROP_PRESENT, | |
495 | POWER_SUPPLY_PROP_ONLINE, | |
496 | POWER_SUPPLY_PROP_TYPE, | |
497 | POWER_SUPPLY_PROP_HEALTH, | |
498 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, | |
499 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, | |
500 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, | |
501 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, | |
502 | POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, | |
503 | }; | |
504 | ||
505 | static const struct power_supply_desc axp288_charger_desc = { | |
506 | .name = "axp288_charger", | |
507 | .type = POWER_SUPPLY_TYPE_USB, | |
508 | .properties = axp288_usb_props, | |
509 | .num_properties = ARRAY_SIZE(axp288_usb_props), | |
510 | .get_property = axp288_charger_usb_get_property, | |
511 | .set_property = axp288_charger_usb_set_property, | |
512 | .property_is_writeable = axp288_charger_property_is_writeable, | |
513 | }; | |
514 | ||
515 | static irqreturn_t axp288_charger_irq_thread_handler(int irq, void *dev) | |
516 | { | |
517 | struct axp288_chrg_info *info = dev; | |
518 | int i; | |
519 | ||
520 | for (i = 0; i < CHRG_INTR_END; i++) { | |
521 | if (info->irq[i] == irq) | |
522 | break; | |
523 | } | |
524 | ||
525 | if (i >= CHRG_INTR_END) { | |
526 | dev_warn(&info->pdev->dev, "spurious interrupt!!\n"); | |
527 | return IRQ_NONE; | |
528 | } | |
529 | ||
530 | switch (i) { | |
531 | case VBUS_OV_IRQ: | |
532 | dev_dbg(&info->pdev->dev, "VBUS Over Voltage INTR\n"); | |
533 | break; | |
534 | case CHARGE_DONE_IRQ: | |
535 | dev_dbg(&info->pdev->dev, "Charging Done INTR\n"); | |
536 | break; | |
537 | case CHARGE_CHARGING_IRQ: | |
538 | dev_dbg(&info->pdev->dev, "Start Charging IRQ\n"); | |
539 | break; | |
540 | case BAT_SAFE_QUIT_IRQ: | |
541 | dev_dbg(&info->pdev->dev, | |
542 | "Quit Safe Mode(restart timer) Charging IRQ\n"); | |
543 | break; | |
544 | case BAT_SAFE_ENTER_IRQ: | |
545 | dev_dbg(&info->pdev->dev, | |
546 | "Enter Safe Mode(timer expire) Charging IRQ\n"); | |
547 | break; | |
548 | case QCBTU_IRQ: | |
549 | dev_dbg(&info->pdev->dev, | |
550 | "Quit Battery Under Temperature(CHRG) INTR\n"); | |
551 | break; | |
552 | case CBTU_IRQ: | |
553 | dev_dbg(&info->pdev->dev, | |
554 | "Hit Battery Under Temperature(CHRG) INTR\n"); | |
555 | break; | |
556 | case QCBTO_IRQ: | |
557 | dev_dbg(&info->pdev->dev, | |
558 | "Quit Battery Over Temperature(CHRG) INTR\n"); | |
559 | break; | |
560 | case CBTO_IRQ: | |
561 | dev_dbg(&info->pdev->dev, | |
562 | "Hit Battery Over Temperature(CHRG) INTR\n"); | |
563 | break; | |
564 | default: | |
565 | dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n"); | |
566 | goto out; | |
567 | } | |
568 | ||
569 | power_supply_changed(info->psy_usb); | |
570 | out: | |
571 | return IRQ_HANDLED; | |
572 | } | |
573 | ||
574 | static void axp288_charger_extcon_evt_worker(struct work_struct *work) | |
575 | { | |
576 | struct axp288_chrg_info *info = | |
577 | container_of(work, struct axp288_chrg_info, cable.work); | |
578 | int ret, current_limit; | |
579 | bool changed = false; | |
580 | struct extcon_dev *edev = info->cable.edev; | |
581 | bool old_connected = info->cable.connected; | |
582 | ||
583 | /* Determine cable/charger type */ | |
b396cff5 | 584 | if (extcon_get_cable_state_(edev, EXTCON_CHG_USB_SDP) > 0) { |
843735b7 RP |
585 | dev_dbg(&info->pdev->dev, "USB SDP charger is connected"); |
586 | info->cable.connected = true; | |
587 | info->cable.chg_type = POWER_SUPPLY_TYPE_USB; | |
b396cff5 | 588 | } else if (extcon_get_cable_state_(edev, EXTCON_CHG_USB_CDP) > 0) { |
843735b7 RP |
589 | dev_dbg(&info->pdev->dev, "USB CDP charger is connected"); |
590 | info->cable.connected = true; | |
591 | info->cable.chg_type = POWER_SUPPLY_TYPE_USB_CDP; | |
b396cff5 | 592 | } else if (extcon_get_cable_state_(edev, EXTCON_CHG_USB_DCP) > 0) { |
843735b7 RP |
593 | dev_dbg(&info->pdev->dev, "USB DCP charger is connected"); |
594 | info->cable.connected = true; | |
595 | info->cable.chg_type = POWER_SUPPLY_TYPE_USB_DCP; | |
596 | } else { | |
597 | if (old_connected) | |
598 | dev_dbg(&info->pdev->dev, "USB charger disconnected"); | |
599 | info->cable.connected = false; | |
600 | info->cable.chg_type = POWER_SUPPLY_TYPE_USB; | |
601 | } | |
602 | ||
603 | /* Cable status changed */ | |
604 | if (old_connected != info->cable.connected) | |
605 | changed = true; | |
606 | ||
607 | if (!changed) | |
608 | return; | |
609 | ||
610 | mutex_lock(&info->lock); | |
611 | ||
612 | if (info->is_charger_enabled && !info->cable.connected) { | |
613 | info->enable_charger = false; | |
614 | ret = axp288_charger_enable_charger(info, info->enable_charger); | |
615 | if (ret < 0) | |
616 | dev_err(&info->pdev->dev, | |
617 | "cannot disable charger (%d)", ret); | |
618 | ||
619 | } else if (!info->is_charger_enabled && info->cable.connected) { | |
620 | switch (info->cable.chg_type) { | |
621 | case POWER_SUPPLY_TYPE_USB: | |
622 | current_limit = ILIM_500MA; | |
623 | break; | |
624 | case POWER_SUPPLY_TYPE_USB_CDP: | |
625 | current_limit = ILIM_1500MA; | |
626 | break; | |
627 | case POWER_SUPPLY_TYPE_USB_DCP: | |
628 | current_limit = ILIM_2000MA; | |
629 | break; | |
630 | default: | |
631 | /* Unknown */ | |
632 | current_limit = 0; | |
633 | break; | |
634 | } | |
635 | ||
636 | /* Set vbus current limit first, then enable charger */ | |
637 | ret = axp288_charger_set_vbus_inlmt(info, current_limit); | |
638 | if (ret < 0) { | |
639 | dev_err(&info->pdev->dev, | |
640 | "error setting current limit (%d)", ret); | |
641 | } else { | |
642 | info->enable_charger = (current_limit > 0); | |
643 | ret = axp288_charger_enable_charger(info, | |
644 | info->enable_charger); | |
645 | if (ret < 0) | |
646 | dev_err(&info->pdev->dev, | |
647 | "cannot enable charger (%d)", ret); | |
648 | } | |
649 | } | |
650 | ||
651 | if (changed) | |
652 | info->health = axp288_get_charger_health(info); | |
653 | ||
654 | mutex_unlock(&info->lock); | |
655 | ||
656 | if (changed) | |
657 | power_supply_changed(info->psy_usb); | |
658 | } | |
659 | ||
660 | static int axp288_charger_handle_cable_evt(struct notifier_block *nb, | |
661 | unsigned long event, void *param) | |
662 | { | |
663 | struct axp288_chrg_info *info = | |
664 | container_of(nb, struct axp288_chrg_info, cable.nb); | |
665 | ||
666 | schedule_work(&info->cable.work); | |
667 | ||
668 | return NOTIFY_OK; | |
669 | } | |
670 | ||
671 | static void axp288_charger_otg_evt_worker(struct work_struct *work) | |
672 | { | |
673 | struct axp288_chrg_info *info = | |
674 | container_of(work, struct axp288_chrg_info, otg.work); | |
675 | int ret; | |
676 | ||
677 | /* Disable VBUS path before enabling the 5V boost */ | |
678 | ret = axp288_charger_vbus_path_select(info, !info->otg.id_short); | |
679 | if (ret < 0) | |
680 | dev_warn(&info->pdev->dev, "vbus path disable failed\n"); | |
681 | } | |
682 | ||
683 | static int axp288_charger_handle_otg_evt(struct notifier_block *nb, | |
684 | unsigned long event, void *param) | |
685 | { | |
686 | struct axp288_chrg_info *info = | |
687 | container_of(nb, struct axp288_chrg_info, otg.id_nb); | |
b396cff5 CC |
688 | struct extcon_dev *edev = info->otg.cable; |
689 | int usb_host = extcon_get_cable_state_(edev, EXTCON_USB_HOST); | |
843735b7 RP |
690 | |
691 | dev_dbg(&info->pdev->dev, "external connector USB-Host is %s\n", | |
692 | usb_host ? "attached" : "detached"); | |
693 | ||
694 | /* | |
695 | * Set usb_id_short flag to avoid running charger detection logic | |
696 | * in case usb host. | |
697 | */ | |
698 | info->otg.id_short = usb_host; | |
699 | schedule_work(&info->otg.work); | |
700 | ||
701 | return NOTIFY_OK; | |
702 | } | |
703 | ||
704 | static void charger_init_hw_regs(struct axp288_chrg_info *info) | |
705 | { | |
706 | int ret, cc, cv; | |
707 | unsigned int val; | |
708 | ||
709 | /* Program temperature thresholds */ | |
710 | ret = regmap_write(info->regmap, AXP20X_V_LTF_CHRG, CHRG_VLTFC_0C); | |
711 | if (ret < 0) | |
712 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
713 | AXP20X_V_LTF_CHRG, ret); | |
714 | ||
715 | ret = regmap_write(info->regmap, AXP20X_V_HTF_CHRG, CHRG_VHTFC_45C); | |
716 | if (ret < 0) | |
717 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
718 | AXP20X_V_HTF_CHRG, ret); | |
719 | ||
720 | /* Do not turn-off charger o/p after charge cycle ends */ | |
721 | ret = regmap_update_bits(info->regmap, | |
722 | AXP20X_CHRG_CTRL2, | |
723 | CNTL2_CHG_OUT_TURNON, 1); | |
724 | if (ret < 0) | |
725 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
726 | AXP20X_CHRG_CTRL2, ret); | |
727 | ||
728 | /* Enable interrupts */ | |
729 | ret = regmap_update_bits(info->regmap, | |
730 | AXP20X_IRQ2_EN, | |
731 | BAT_IRQ_CFG_BAT_MASK, 1); | |
732 | if (ret < 0) | |
733 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
734 | AXP20X_IRQ2_EN, ret); | |
735 | ||
736 | ret = regmap_update_bits(info->regmap, AXP20X_IRQ3_EN, | |
737 | TEMP_IRQ_CFG_MASK, 1); | |
738 | if (ret < 0) | |
739 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
740 | AXP20X_IRQ3_EN, ret); | |
741 | ||
742 | /* Setup ending condition for charging to be 10% of I(chrg) */ | |
743 | ret = regmap_update_bits(info->regmap, | |
744 | AXP20X_CHRG_CTRL1, | |
745 | CHRG_CCCV_ITERM_20P, 0); | |
746 | if (ret < 0) | |
747 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
748 | AXP20X_CHRG_CTRL1, ret); | |
749 | ||
750 | /* Disable OCV-SOC curve calibration */ | |
751 | ret = regmap_update_bits(info->regmap, | |
752 | AXP20X_CC_CTRL, | |
753 | FG_CNTL_OCV_ADJ_EN, 0); | |
754 | if (ret < 0) | |
755 | dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", | |
756 | AXP20X_CC_CTRL, ret); | |
757 | ||
758 | /* Init charging current and voltage */ | |
759 | info->max_cc = info->pdata->max_cc; | |
760 | info->max_cv = info->pdata->max_cv; | |
761 | ||
762 | /* Read current charge voltage and current limit */ | |
763 | ret = regmap_read(info->regmap, AXP20X_CHRG_CTRL1, &val); | |
764 | if (ret < 0) { | |
765 | /* Assume default if cannot read */ | |
766 | info->cc = info->pdata->def_cc; | |
767 | info->cv = info->pdata->def_cv; | |
768 | } else { | |
769 | /* Determine charge voltage */ | |
770 | cv = (val & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS; | |
771 | switch (cv) { | |
772 | case CHRG_CCCV_CV_4100MV: | |
773 | info->cv = CV_4100MV; | |
774 | break; | |
775 | case CHRG_CCCV_CV_4150MV: | |
776 | info->cv = CV_4150MV; | |
777 | break; | |
778 | case CHRG_CCCV_CV_4200MV: | |
779 | info->cv = CV_4200MV; | |
780 | break; | |
781 | case CHRG_CCCV_CV_4350MV: | |
782 | info->cv = CV_4350MV; | |
783 | break; | |
784 | default: | |
785 | info->cv = INT_MAX; | |
786 | break; | |
787 | } | |
788 | ||
789 | /* Determine charge current limit */ | |
790 | cc = (ret & CHRG_CCCV_CC_MASK) >> CHRG_CCCV_CC_BIT_POS; | |
791 | cc = (cc * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET; | |
792 | info->cc = cc; | |
793 | ||
794 | /* Program default charging voltage and current */ | |
795 | cc = min(info->pdata->def_cc, info->max_cc); | |
796 | cv = min(info->pdata->def_cv, info->max_cv); | |
797 | ||
798 | ret = axp288_charger_set_cc(info, cc); | |
799 | if (ret < 0) | |
800 | dev_warn(&info->pdev->dev, | |
801 | "error(%d) in setting CC\n", ret); | |
802 | ||
803 | ret = axp288_charger_set_cv(info, cv); | |
804 | if (ret < 0) | |
805 | dev_warn(&info->pdev->dev, | |
806 | "error(%d) in setting CV\n", ret); | |
807 | } | |
808 | } | |
809 | ||
810 | static int axp288_charger_probe(struct platform_device *pdev) | |
811 | { | |
812 | int ret, i, pirq; | |
813 | struct axp288_chrg_info *info; | |
814 | struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); | |
815 | struct power_supply_config charger_cfg = {}; | |
816 | ||
817 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
818 | if (!info) | |
819 | return -ENOMEM; | |
820 | ||
821 | info->pdev = pdev; | |
822 | info->regmap = axp20x->regmap; | |
823 | info->regmap_irqc = axp20x->regmap_irqc; | |
824 | info->pdata = pdev->dev.platform_data; | |
825 | ||
826 | if (!info->pdata) { | |
827 | /* Try ACPI provided pdata via device properties */ | |
828 | if (!device_property_present(&pdev->dev, | |
829 | "axp288_charger_data\n")) | |
830 | dev_err(&pdev->dev, "failed to get platform data\n"); | |
831 | return -ENODEV; | |
832 | } | |
833 | ||
834 | info->cable.edev = extcon_get_extcon_dev(AXP288_EXTCON_DEV_NAME); | |
835 | if (info->cable.edev == NULL) { | |
836 | dev_dbg(&pdev->dev, "%s is not ready, probe deferred\n", | |
837 | AXP288_EXTCON_DEV_NAME); | |
838 | return -EPROBE_DEFER; | |
839 | } | |
840 | ||
841 | /* Register for extcon notification */ | |
842 | INIT_WORK(&info->cable.work, axp288_charger_extcon_evt_worker); | |
843 | info->cable.nb.notifier_call = axp288_charger_handle_cable_evt; | |
b396cff5 CC |
844 | ret = extcon_register_notifier(info->cable.edev, EXTCON_CHG_USB_SDP, |
845 | &info->cable.nb); | |
846 | if (ret) { | |
847 | dev_err(&info->pdev->dev, | |
848 | "failed to register extcon notifier for SDP %d\n", ret); | |
849 | return ret; | |
850 | } | |
851 | ||
852 | ret = extcon_register_notifier(info->cable.edev, EXTCON_CHG_USB_CDP, | |
853 | &info->cable.nb); | |
854 | if (ret) { | |
855 | dev_err(&info->pdev->dev, | |
856 | "failed to register extcon notifier for CDP %d\n", ret); | |
857 | extcon_unregister_notifier(info->cable.edev, | |
858 | EXTCON_CHG_USB_SDP, &info->cable.nb); | |
859 | return ret; | |
860 | } | |
861 | ||
862 | ret = extcon_register_notifier(info->cable.edev, EXTCON_CHG_USB_DCP, | |
863 | &info->cable.nb); | |
843735b7 RP |
864 | if (ret) { |
865 | dev_err(&info->pdev->dev, | |
b396cff5 CC |
866 | "failed to register extcon notifier for DCP %d\n", ret); |
867 | extcon_unregister_notifier(info->cable.edev, | |
868 | EXTCON_CHG_USB_SDP, &info->cable.nb); | |
869 | extcon_unregister_notifier(info->cable.edev, | |
870 | EXTCON_CHG_USB_CDP, &info->cable.nb); | |
843735b7 RP |
871 | return ret; |
872 | } | |
873 | ||
874 | platform_set_drvdata(pdev, info); | |
875 | mutex_init(&info->lock); | |
876 | ||
877 | /* Register with power supply class */ | |
878 | charger_cfg.drv_data = info; | |
879 | info->psy_usb = power_supply_register(&pdev->dev, &axp288_charger_desc, | |
880 | &charger_cfg); | |
881 | if (IS_ERR(info->psy_usb)) { | |
882 | dev_err(&pdev->dev, "failed to register power supply charger\n"); | |
883 | ret = PTR_ERR(info->psy_usb); | |
884 | goto psy_reg_failed; | |
885 | } | |
886 | ||
887 | /* Register for OTG notification */ | |
888 | INIT_WORK(&info->otg.work, axp288_charger_otg_evt_worker); | |
889 | info->otg.id_nb.notifier_call = axp288_charger_handle_otg_evt; | |
b396cff5 | 890 | ret = extcon_register_notifier(info->otg.cable, EXTCON_USB_HOST, |
843735b7 RP |
891 | &info->otg.id_nb); |
892 | if (ret) | |
893 | dev_warn(&pdev->dev, "failed to register otg notifier\n"); | |
894 | ||
b396cff5 CC |
895 | if (info->otg.cable) |
896 | info->otg.id_short = extcon_get_cable_state_( | |
897 | info->otg.cable, EXTCON_USB_HOST); | |
843735b7 RP |
898 | |
899 | /* Register charger interrupts */ | |
900 | for (i = 0; i < CHRG_INTR_END; i++) { | |
901 | pirq = platform_get_irq(info->pdev, i); | |
902 | info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq); | |
903 | if (info->irq[i] < 0) { | |
904 | dev_warn(&info->pdev->dev, | |
905 | "failed to get virtual interrupt=%d\n", pirq); | |
906 | ret = info->irq[i]; | |
907 | goto intr_reg_failed; | |
908 | } | |
909 | ret = devm_request_threaded_irq(&info->pdev->dev, info->irq[i], | |
910 | NULL, axp288_charger_irq_thread_handler, | |
911 | IRQF_ONESHOT, info->pdev->name, info); | |
912 | if (ret) { | |
913 | dev_err(&pdev->dev, "failed to request interrupt=%d\n", | |
914 | info->irq[i]); | |
915 | goto intr_reg_failed; | |
916 | } | |
917 | } | |
918 | ||
919 | charger_init_hw_regs(info); | |
920 | ||
921 | return 0; | |
922 | ||
923 | intr_reg_failed: | |
b396cff5 CC |
924 | if (info->otg.cable) |
925 | extcon_unregister_notifier(info->otg.cable, EXTCON_USB_HOST, | |
926 | &info->otg.id_nb); | |
843735b7 RP |
927 | power_supply_unregister(info->psy_usb); |
928 | psy_reg_failed: | |
b396cff5 CC |
929 | extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_SDP, |
930 | &info->cable.nb); | |
931 | extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_CDP, | |
932 | &info->cable.nb); | |
933 | extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_DCP, | |
934 | &info->cable.nb); | |
843735b7 RP |
935 | return ret; |
936 | } | |
937 | ||
938 | static int axp288_charger_remove(struct platform_device *pdev) | |
939 | { | |
940 | struct axp288_chrg_info *info = dev_get_drvdata(&pdev->dev); | |
941 | ||
b396cff5 CC |
942 | if (info->otg.cable) |
943 | extcon_unregister_notifier(info->otg.cable, EXTCON_USB_HOST, | |
944 | &info->otg.id_nb); | |
843735b7 | 945 | |
b396cff5 CC |
946 | extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_SDP, |
947 | &info->cable.nb); | |
948 | extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_CDP, | |
949 | &info->cable.nb); | |
950 | extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_DCP, | |
951 | &info->cable.nb); | |
843735b7 RP |
952 | power_supply_unregister(info->psy_usb); |
953 | ||
954 | return 0; | |
955 | } | |
956 | ||
957 | static struct platform_driver axp288_charger_driver = { | |
958 | .probe = axp288_charger_probe, | |
959 | .remove = axp288_charger_remove, | |
960 | .driver = { | |
961 | .name = "axp288_charger", | |
962 | }, | |
963 | }; | |
964 | ||
965 | module_platform_driver(axp288_charger_driver); | |
966 | ||
967 | MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>"); | |
968 | MODULE_DESCRIPTION("X-power AXP288 Charger Driver"); | |
969 | MODULE_LICENSE("GPL v2"); |