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84edbeea AM |
1 | /* |
2 | * Copyright (C) ST-Ericsson SA 2012 | |
3 | * | |
4 | * Charger driver for AB8500 | |
5 | * | |
6 | * License Terms: GNU General Public License v2 | |
7 | * Author: | |
8 | * Johan Palsson <johan.palsson@stericsson.com> | |
9 | * Karl Komierowski <karl.komierowski@stericsson.com> | |
10 | * Arun R Murthy <arun.murthy@stericsson.com> | |
11 | */ | |
12 | ||
13 | #include <linux/init.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/power_supply.h> | |
21 | #include <linux/completion.h> | |
22 | #include <linux/regulator/consumer.h> | |
23 | #include <linux/err.h> | |
24 | #include <linux/workqueue.h> | |
25 | #include <linux/kobject.h> | |
26 | #include <linux/mfd/abx500/ab8500.h> | |
27 | #include <linux/mfd/abx500.h> | |
28 | #include <linux/mfd/abx500/ab8500-bm.h> | |
29 | #include <linux/mfd/abx500/ab8500-gpadc.h> | |
30 | #include <linux/mfd/abx500/ux500_chargalg.h> | |
31 | #include <linux/usb/otg.h> | |
32 | ||
33 | /* Charger constants */ | |
34 | #define NO_PW_CONN 0 | |
35 | #define AC_PW_CONN 1 | |
36 | #define USB_PW_CONN 2 | |
37 | ||
38 | #define MAIN_WDOG_ENA 0x01 | |
39 | #define MAIN_WDOG_KICK 0x02 | |
40 | #define MAIN_WDOG_DIS 0x00 | |
41 | #define CHARG_WD_KICK 0x01 | |
42 | #define MAIN_CH_ENA 0x01 | |
43 | #define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02 | |
44 | #define USB_CH_ENA 0x01 | |
45 | #define USB_CHG_NO_OVERSHOOT_ENA_N 0x02 | |
46 | #define MAIN_CH_DET 0x01 | |
47 | #define MAIN_CH_CV_ON 0x04 | |
48 | #define USB_CH_CV_ON 0x08 | |
49 | #define VBUS_DET_DBNC100 0x02 | |
50 | #define VBUS_DET_DBNC1 0x01 | |
51 | #define OTP_ENABLE_WD 0x01 | |
52 | ||
53 | #define MAIN_CH_INPUT_CURR_SHIFT 4 | |
54 | #define VBUS_IN_CURR_LIM_SHIFT 4 | |
55 | ||
56 | #define LED_INDICATOR_PWM_ENA 0x01 | |
57 | #define LED_INDICATOR_PWM_DIS 0x00 | |
58 | #define LED_IND_CUR_5MA 0x04 | |
59 | #define LED_INDICATOR_PWM_DUTY_252_256 0xBF | |
60 | ||
61 | /* HW failure constants */ | |
62 | #define MAIN_CH_TH_PROT 0x02 | |
63 | #define VBUS_CH_NOK 0x08 | |
64 | #define USB_CH_TH_PROT 0x02 | |
65 | #define VBUS_OVV_TH 0x01 | |
66 | #define MAIN_CH_NOK 0x01 | |
67 | #define VBUS_DET 0x80 | |
68 | ||
69 | /* UsbLineStatus register bit masks */ | |
70 | #define AB8500_USB_LINK_STATUS 0x78 | |
71 | #define AB8500_STD_HOST_SUSP 0x18 | |
72 | ||
73 | /* Watchdog timeout constant */ | |
74 | #define WD_TIMER 0x30 /* 4min */ | |
75 | #define WD_KICK_INTERVAL (60 * HZ) | |
76 | ||
77 | /* Lowest charger voltage is 3.39V -> 0x4E */ | |
78 | #define LOW_VOLT_REG 0x4E | |
79 | ||
80 | /* UsbLineStatus register - usb types */ | |
81 | enum ab8500_charger_link_status { | |
82 | USB_STAT_NOT_CONFIGURED, | |
83 | USB_STAT_STD_HOST_NC, | |
84 | USB_STAT_STD_HOST_C_NS, | |
85 | USB_STAT_STD_HOST_C_S, | |
86 | USB_STAT_HOST_CHG_NM, | |
87 | USB_STAT_HOST_CHG_HS, | |
88 | USB_STAT_HOST_CHG_HS_CHIRP, | |
89 | USB_STAT_DEDICATED_CHG, | |
90 | USB_STAT_ACA_RID_A, | |
91 | USB_STAT_ACA_RID_B, | |
92 | USB_STAT_ACA_RID_C_NM, | |
93 | USB_STAT_ACA_RID_C_HS, | |
94 | USB_STAT_ACA_RID_C_HS_CHIRP, | |
95 | USB_STAT_HM_IDGND, | |
96 | USB_STAT_RESERVED, | |
97 | USB_STAT_NOT_VALID_LINK, | |
98 | }; | |
99 | ||
100 | enum ab8500_usb_state { | |
101 | AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */ | |
102 | AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */ | |
103 | AB8500_BM_USB_STATE_CONFIGURED, | |
104 | AB8500_BM_USB_STATE_SUSPEND, | |
105 | AB8500_BM_USB_STATE_RESUME, | |
106 | AB8500_BM_USB_STATE_MAX, | |
107 | }; | |
108 | ||
109 | /* VBUS input current limits supported in AB8500 in mA */ | |
110 | #define USB_CH_IP_CUR_LVL_0P05 50 | |
111 | #define USB_CH_IP_CUR_LVL_0P09 98 | |
112 | #define USB_CH_IP_CUR_LVL_0P19 193 | |
113 | #define USB_CH_IP_CUR_LVL_0P29 290 | |
114 | #define USB_CH_IP_CUR_LVL_0P38 380 | |
115 | #define USB_CH_IP_CUR_LVL_0P45 450 | |
116 | #define USB_CH_IP_CUR_LVL_0P5 500 | |
117 | #define USB_CH_IP_CUR_LVL_0P6 600 | |
118 | #define USB_CH_IP_CUR_LVL_0P7 700 | |
119 | #define USB_CH_IP_CUR_LVL_0P8 800 | |
120 | #define USB_CH_IP_CUR_LVL_0P9 900 | |
121 | #define USB_CH_IP_CUR_LVL_1P0 1000 | |
122 | #define USB_CH_IP_CUR_LVL_1P1 1100 | |
123 | #define USB_CH_IP_CUR_LVL_1P3 1300 | |
124 | #define USB_CH_IP_CUR_LVL_1P4 1400 | |
125 | #define USB_CH_IP_CUR_LVL_1P5 1500 | |
126 | ||
127 | #define VBAT_TRESH_IP_CUR_RED 3800 | |
128 | ||
129 | #define to_ab8500_charger_usb_device_info(x) container_of((x), \ | |
130 | struct ab8500_charger, usb_chg) | |
131 | #define to_ab8500_charger_ac_device_info(x) container_of((x), \ | |
132 | struct ab8500_charger, ac_chg) | |
133 | ||
134 | /** | |
135 | * struct ab8500_charger_interrupts - ab8500 interupts | |
136 | * @name: name of the interrupt | |
137 | * @isr function pointer to the isr | |
138 | */ | |
139 | struct ab8500_charger_interrupts { | |
140 | char *name; | |
141 | irqreturn_t (*isr)(int irq, void *data); | |
142 | }; | |
143 | ||
144 | struct ab8500_charger_info { | |
145 | int charger_connected; | |
146 | int charger_online; | |
147 | int charger_voltage; | |
148 | int cv_active; | |
149 | bool wd_expired; | |
150 | }; | |
151 | ||
152 | struct ab8500_charger_event_flags { | |
153 | bool mainextchnotok; | |
154 | bool main_thermal_prot; | |
155 | bool usb_thermal_prot; | |
156 | bool vbus_ovv; | |
157 | bool usbchargernotok; | |
158 | bool chgwdexp; | |
159 | bool vbus_collapse; | |
160 | }; | |
161 | ||
162 | struct ab8500_charger_usb_state { | |
163 | bool usb_changed; | |
164 | int usb_current; | |
165 | enum ab8500_usb_state state; | |
166 | spinlock_t usb_lock; | |
167 | }; | |
168 | ||
169 | /** | |
170 | * struct ab8500_charger - ab8500 Charger device information | |
171 | * @dev: Pointer to the structure device | |
172 | * @max_usb_in_curr: Max USB charger input current | |
173 | * @vbus_detected: VBUS detected | |
174 | * @vbus_detected_start: | |
175 | * VBUS detected during startup | |
176 | * @ac_conn: This will be true when the AC charger has been plugged | |
177 | * @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC | |
178 | * charger is enabled | |
179 | * @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB | |
180 | * charger is enabled | |
181 | * @vbat Battery voltage | |
182 | * @old_vbat Previously measured battery voltage | |
183 | * @autopower Indicate if we should have automatic pwron after pwrloss | |
184 | * @parent: Pointer to the struct ab8500 | |
185 | * @gpadc: Pointer to the struct gpadc | |
186 | * @pdata: Pointer to the abx500_charger platform data | |
187 | * @bat: Pointer to the abx500_bm platform data | |
188 | * @flags: Structure for information about events triggered | |
189 | * @usb_state: Structure for usb stack information | |
190 | * @ac_chg: AC charger power supply | |
191 | * @usb_chg: USB charger power supply | |
192 | * @ac: Structure that holds the AC charger properties | |
193 | * @usb: Structure that holds the USB charger properties | |
194 | * @regu: Pointer to the struct regulator | |
195 | * @charger_wq: Work queue for the IRQs and checking HW state | |
196 | * @check_vbat_work Work for checking vbat threshold to adjust vbus current | |
197 | * @check_hw_failure_work: Work for checking HW state | |
198 | * @check_usbchgnotok_work: Work for checking USB charger not ok status | |
199 | * @kick_wd_work: Work for kicking the charger watchdog in case | |
200 | * of ABB rev 1.* due to the watchog logic bug | |
201 | * @ac_work: Work for checking AC charger connection | |
202 | * @detect_usb_type_work: Work for detecting the USB type connected | |
203 | * @usb_link_status_work: Work for checking the new USB link status | |
204 | * @usb_state_changed_work: Work for checking USB state | |
205 | * @check_main_thermal_prot_work: | |
206 | * Work for checking Main thermal status | |
207 | * @check_usb_thermal_prot_work: | |
208 | * Work for checking USB thermal status | |
209 | */ | |
210 | struct ab8500_charger { | |
211 | struct device *dev; | |
212 | int max_usb_in_curr; | |
213 | bool vbus_detected; | |
214 | bool vbus_detected_start; | |
215 | bool ac_conn; | |
216 | bool vddadc_en_ac; | |
217 | bool vddadc_en_usb; | |
218 | int vbat; | |
219 | int old_vbat; | |
220 | bool autopower; | |
221 | struct ab8500 *parent; | |
222 | struct ab8500_gpadc *gpadc; | |
223 | struct abx500_charger_platform_data *pdata; | |
224 | struct abx500_bm_data *bat; | |
225 | struct ab8500_charger_event_flags flags; | |
226 | struct ab8500_charger_usb_state usb_state; | |
227 | struct ux500_charger ac_chg; | |
228 | struct ux500_charger usb_chg; | |
229 | struct ab8500_charger_info ac; | |
230 | struct ab8500_charger_info usb; | |
231 | struct regulator *regu; | |
232 | struct workqueue_struct *charger_wq; | |
233 | struct delayed_work check_vbat_work; | |
234 | struct delayed_work check_hw_failure_work; | |
235 | struct delayed_work check_usbchgnotok_work; | |
236 | struct delayed_work kick_wd_work; | |
237 | struct work_struct ac_work; | |
238 | struct work_struct detect_usb_type_work; | |
239 | struct work_struct usb_link_status_work; | |
240 | struct work_struct usb_state_changed_work; | |
241 | struct work_struct check_main_thermal_prot_work; | |
242 | struct work_struct check_usb_thermal_prot_work; | |
efd71c89 | 243 | struct usb_phy *usb_phy; |
84edbeea AM |
244 | struct notifier_block nb; |
245 | }; | |
246 | ||
247 | /* AC properties */ | |
248 | static enum power_supply_property ab8500_charger_ac_props[] = { | |
249 | POWER_SUPPLY_PROP_HEALTH, | |
250 | POWER_SUPPLY_PROP_PRESENT, | |
251 | POWER_SUPPLY_PROP_ONLINE, | |
252 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
253 | POWER_SUPPLY_PROP_VOLTAGE_AVG, | |
254 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
255 | }; | |
256 | ||
257 | /* USB properties */ | |
258 | static enum power_supply_property ab8500_charger_usb_props[] = { | |
259 | POWER_SUPPLY_PROP_HEALTH, | |
260 | POWER_SUPPLY_PROP_CURRENT_AVG, | |
261 | POWER_SUPPLY_PROP_PRESENT, | |
262 | POWER_SUPPLY_PROP_ONLINE, | |
263 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
264 | POWER_SUPPLY_PROP_VOLTAGE_AVG, | |
265 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
266 | }; | |
267 | ||
268 | /** | |
269 | * ab8500_power_loss_handling - set how we handle powerloss. | |
270 | * @di: pointer to the ab8500_charger structure | |
271 | * | |
272 | * Magic nummbers are from STE HW department. | |
273 | */ | |
274 | static void ab8500_power_loss_handling(struct ab8500_charger *di) | |
275 | { | |
276 | u8 reg; | |
277 | int ret; | |
278 | ||
279 | dev_dbg(di->dev, "Autopower : %d\n", di->autopower); | |
280 | ||
281 | /* read the autopower register */ | |
282 | ret = abx500_get_register_interruptible(di->dev, 0x15, 0x00, ®); | |
283 | if (ret) { | |
284 | dev_err(di->dev, "%d write failed\n", __LINE__); | |
285 | return; | |
286 | } | |
287 | ||
288 | /* enable the OPT emulation registers */ | |
289 | ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2); | |
290 | if (ret) { | |
291 | dev_err(di->dev, "%d write failed\n", __LINE__); | |
292 | return; | |
293 | } | |
294 | ||
295 | if (di->autopower) | |
296 | reg |= 0x8; | |
297 | else | |
298 | reg &= ~0x8; | |
299 | ||
300 | /* write back the changed value to autopower reg */ | |
301 | ret = abx500_set_register_interruptible(di->dev, 0x15, 0x00, reg); | |
302 | if (ret) { | |
303 | dev_err(di->dev, "%d write failed\n", __LINE__); | |
304 | return; | |
305 | } | |
306 | ||
307 | /* disable the set OTP registers again */ | |
308 | ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0); | |
309 | if (ret) { | |
310 | dev_err(di->dev, "%d write failed\n", __LINE__); | |
311 | return; | |
312 | } | |
313 | } | |
314 | ||
315 | /** | |
316 | * ab8500_power_supply_changed - a wrapper with local extentions for | |
317 | * power_supply_changed | |
318 | * @di: pointer to the ab8500_charger structure | |
319 | * @psy: pointer to power_supply_that have changed. | |
320 | * | |
321 | */ | |
322 | static void ab8500_power_supply_changed(struct ab8500_charger *di, | |
323 | struct power_supply *psy) | |
324 | { | |
325 | if (di->pdata->autopower_cfg) { | |
326 | if (!di->usb.charger_connected && | |
327 | !di->ac.charger_connected && | |
328 | di->autopower) { | |
329 | di->autopower = false; | |
330 | ab8500_power_loss_handling(di); | |
331 | } else if (!di->autopower && | |
332 | (di->ac.charger_connected || | |
333 | di->usb.charger_connected)) { | |
334 | di->autopower = true; | |
335 | ab8500_power_loss_handling(di); | |
336 | } | |
337 | } | |
338 | power_supply_changed(psy); | |
339 | } | |
340 | ||
341 | static void ab8500_charger_set_usb_connected(struct ab8500_charger *di, | |
342 | bool connected) | |
343 | { | |
344 | if (connected != di->usb.charger_connected) { | |
345 | dev_dbg(di->dev, "USB connected:%i\n", connected); | |
346 | di->usb.charger_connected = connected; | |
347 | sysfs_notify(&di->usb_chg.psy.dev->kobj, NULL, "present"); | |
348 | } | |
349 | } | |
350 | ||
351 | /** | |
352 | * ab8500_charger_get_ac_voltage() - get ac charger voltage | |
353 | * @di: pointer to the ab8500_charger structure | |
354 | * | |
355 | * Returns ac charger voltage (on success) | |
356 | */ | |
357 | static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di) | |
358 | { | |
359 | int vch; | |
360 | ||
361 | /* Only measure voltage if the charger is connected */ | |
362 | if (di->ac.charger_connected) { | |
363 | vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V); | |
364 | if (vch < 0) | |
365 | dev_err(di->dev, "%s gpadc conv failed,\n", __func__); | |
366 | } else { | |
367 | vch = 0; | |
368 | } | |
369 | return vch; | |
370 | } | |
371 | ||
372 | /** | |
373 | * ab8500_charger_ac_cv() - check if the main charger is in CV mode | |
374 | * @di: pointer to the ab8500_charger structure | |
375 | * | |
376 | * Returns ac charger CV mode (on success) else error code | |
377 | */ | |
378 | static int ab8500_charger_ac_cv(struct ab8500_charger *di) | |
379 | { | |
380 | u8 val; | |
381 | int ret = 0; | |
382 | ||
383 | /* Only check CV mode if the charger is online */ | |
384 | if (di->ac.charger_online) { | |
385 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
386 | AB8500_CH_STATUS1_REG, &val); | |
387 | if (ret < 0) { | |
388 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
389 | return 0; | |
390 | } | |
391 | ||
392 | if (val & MAIN_CH_CV_ON) | |
393 | ret = 1; | |
394 | else | |
395 | ret = 0; | |
396 | } | |
397 | ||
398 | return ret; | |
399 | } | |
400 | ||
401 | /** | |
402 | * ab8500_charger_get_vbus_voltage() - get vbus voltage | |
403 | * @di: pointer to the ab8500_charger structure | |
404 | * | |
405 | * This function returns the vbus voltage. | |
406 | * Returns vbus voltage (on success) | |
407 | */ | |
408 | static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di) | |
409 | { | |
410 | int vch; | |
411 | ||
412 | /* Only measure voltage if the charger is connected */ | |
413 | if (di->usb.charger_connected) { | |
414 | vch = ab8500_gpadc_convert(di->gpadc, VBUS_V); | |
415 | if (vch < 0) | |
416 | dev_err(di->dev, "%s gpadc conv failed\n", __func__); | |
417 | } else { | |
418 | vch = 0; | |
419 | } | |
420 | return vch; | |
421 | } | |
422 | ||
423 | /** | |
424 | * ab8500_charger_get_usb_current() - get usb charger current | |
425 | * @di: pointer to the ab8500_charger structure | |
426 | * | |
427 | * This function returns the usb charger current. | |
428 | * Returns usb current (on success) and error code on failure | |
429 | */ | |
430 | static int ab8500_charger_get_usb_current(struct ab8500_charger *di) | |
431 | { | |
432 | int ich; | |
433 | ||
434 | /* Only measure current if the charger is online */ | |
435 | if (di->usb.charger_online) { | |
436 | ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C); | |
437 | if (ich < 0) | |
438 | dev_err(di->dev, "%s gpadc conv failed\n", __func__); | |
439 | } else { | |
440 | ich = 0; | |
441 | } | |
442 | return ich; | |
443 | } | |
444 | ||
445 | /** | |
446 | * ab8500_charger_get_ac_current() - get ac charger current | |
447 | * @di: pointer to the ab8500_charger structure | |
448 | * | |
449 | * This function returns the ac charger current. | |
450 | * Returns ac current (on success) and error code on failure. | |
451 | */ | |
452 | static int ab8500_charger_get_ac_current(struct ab8500_charger *di) | |
453 | { | |
454 | int ich; | |
455 | ||
456 | /* Only measure current if the charger is online */ | |
457 | if (di->ac.charger_online) { | |
458 | ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C); | |
459 | if (ich < 0) | |
460 | dev_err(di->dev, "%s gpadc conv failed\n", __func__); | |
461 | } else { | |
462 | ich = 0; | |
463 | } | |
464 | return ich; | |
465 | } | |
466 | ||
467 | /** | |
468 | * ab8500_charger_usb_cv() - check if the usb charger is in CV mode | |
469 | * @di: pointer to the ab8500_charger structure | |
470 | * | |
471 | * Returns ac charger CV mode (on success) else error code | |
472 | */ | |
473 | static int ab8500_charger_usb_cv(struct ab8500_charger *di) | |
474 | { | |
475 | int ret; | |
476 | u8 val; | |
477 | ||
478 | /* Only check CV mode if the charger is online */ | |
479 | if (di->usb.charger_online) { | |
480 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
481 | AB8500_CH_USBCH_STAT1_REG, &val); | |
482 | if (ret < 0) { | |
483 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
484 | return 0; | |
485 | } | |
486 | ||
487 | if (val & USB_CH_CV_ON) | |
488 | ret = 1; | |
489 | else | |
490 | ret = 0; | |
491 | } else { | |
492 | ret = 0; | |
493 | } | |
494 | ||
495 | return ret; | |
496 | } | |
497 | ||
498 | /** | |
499 | * ab8500_charger_detect_chargers() - Detect the connected chargers | |
500 | * @di: pointer to the ab8500_charger structure | |
501 | * | |
502 | * Returns the type of charger connected. | |
503 | * For USB it will not mean we can actually charge from it | |
504 | * but that there is a USB cable connected that we have to | |
505 | * identify. This is used during startup when we don't get | |
506 | * interrupts of the charger detection | |
507 | * | |
508 | * Returns an integer value, that means, | |
509 | * NO_PW_CONN no power supply is connected | |
510 | * AC_PW_CONN if the AC power supply is connected | |
511 | * USB_PW_CONN if the USB power supply is connected | |
512 | * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected | |
513 | */ | |
514 | static int ab8500_charger_detect_chargers(struct ab8500_charger *di) | |
515 | { | |
516 | int result = NO_PW_CONN; | |
517 | int ret; | |
518 | u8 val; | |
519 | ||
520 | /* Check for AC charger */ | |
521 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
522 | AB8500_CH_STATUS1_REG, &val); | |
523 | if (ret < 0) { | |
524 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
525 | return ret; | |
526 | } | |
527 | ||
528 | if (val & MAIN_CH_DET) | |
529 | result = AC_PW_CONN; | |
530 | ||
531 | /* Check for USB charger */ | |
532 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
533 | AB8500_CH_USBCH_STAT1_REG, &val); | |
534 | if (ret < 0) { | |
535 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
536 | return ret; | |
537 | } | |
538 | ||
539 | if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100)) | |
540 | result |= USB_PW_CONN; | |
541 | ||
542 | return result; | |
543 | } | |
544 | ||
545 | /** | |
546 | * ab8500_charger_max_usb_curr() - get the max curr for the USB type | |
547 | * @di: pointer to the ab8500_charger structure | |
548 | * @link_status: the identified USB type | |
549 | * | |
550 | * Get the maximum current that is allowed to be drawn from the host | |
551 | * based on the USB type. | |
552 | * Returns error code in case of failure else 0 on success | |
553 | */ | |
554 | static int ab8500_charger_max_usb_curr(struct ab8500_charger *di, | |
555 | enum ab8500_charger_link_status link_status) | |
556 | { | |
557 | int ret = 0; | |
558 | ||
559 | switch (link_status) { | |
560 | case USB_STAT_STD_HOST_NC: | |
561 | case USB_STAT_STD_HOST_C_NS: | |
562 | case USB_STAT_STD_HOST_C_S: | |
563 | dev_dbg(di->dev, "USB Type - Standard host is " | |
564 | "detected through USB driver\n"); | |
565 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P09; | |
566 | break; | |
567 | case USB_STAT_HOST_CHG_HS_CHIRP: | |
568 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5; | |
569 | break; | |
570 | case USB_STAT_HOST_CHG_HS: | |
571 | case USB_STAT_ACA_RID_C_HS: | |
572 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P9; | |
573 | break; | |
574 | case USB_STAT_ACA_RID_A: | |
575 | /* | |
576 | * Dedicated charger level minus maximum current accessory | |
577 | * can consume (300mA). Closest level is 1100mA | |
578 | */ | |
579 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P1; | |
580 | break; | |
581 | case USB_STAT_ACA_RID_B: | |
582 | /* | |
583 | * Dedicated charger level minus 120mA (20mA for ACA and | |
584 | * 100mA for potential accessory). Closest level is 1300mA | |
585 | */ | |
586 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P3; | |
587 | break; | |
588 | case USB_STAT_DEDICATED_CHG: | |
589 | case USB_STAT_HOST_CHG_NM: | |
590 | case USB_STAT_ACA_RID_C_HS_CHIRP: | |
591 | case USB_STAT_ACA_RID_C_NM: | |
592 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5; | |
593 | break; | |
594 | case USB_STAT_RESERVED: | |
595 | /* | |
596 | * This state is used to indicate that VBUS has dropped below | |
597 | * the detection level 4 times in a row. This is due to the | |
598 | * charger output current is set to high making the charger | |
599 | * voltage collapse. This have to be propagated through to | |
600 | * chargalg. This is done using the property | |
601 | * POWER_SUPPLY_PROP_CURRENT_AVG = 1 | |
602 | */ | |
603 | di->flags.vbus_collapse = true; | |
604 | dev_dbg(di->dev, "USB Type - USB_STAT_RESERVED " | |
605 | "VBUS has collapsed\n"); | |
606 | ret = -1; | |
607 | break; | |
608 | case USB_STAT_HM_IDGND: | |
609 | case USB_STAT_NOT_CONFIGURED: | |
610 | case USB_STAT_NOT_VALID_LINK: | |
611 | dev_err(di->dev, "USB Type - Charging not allowed\n"); | |
612 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05; | |
613 | ret = -ENXIO; | |
614 | break; | |
615 | default: | |
616 | dev_err(di->dev, "USB Type - Unknown\n"); | |
617 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05; | |
618 | ret = -ENXIO; | |
619 | break; | |
620 | }; | |
621 | ||
622 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", | |
623 | link_status, di->max_usb_in_curr); | |
624 | ||
625 | return ret; | |
626 | } | |
627 | ||
628 | /** | |
629 | * ab8500_charger_read_usb_type() - read the type of usb connected | |
630 | * @di: pointer to the ab8500_charger structure | |
631 | * | |
632 | * Detect the type of the plugged USB | |
633 | * Returns error code in case of failure else 0 on success | |
634 | */ | |
635 | static int ab8500_charger_read_usb_type(struct ab8500_charger *di) | |
636 | { | |
637 | int ret; | |
638 | u8 val; | |
639 | ||
640 | ret = abx500_get_register_interruptible(di->dev, | |
641 | AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val); | |
642 | if (ret < 0) { | |
643 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
644 | return ret; | |
645 | } | |
646 | ret = abx500_get_register_interruptible(di->dev, AB8500_USB, | |
647 | AB8500_USB_LINE_STAT_REG, &val); | |
648 | if (ret < 0) { | |
649 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
650 | return ret; | |
651 | } | |
652 | ||
653 | /* get the USB type */ | |
654 | val = (val & AB8500_USB_LINK_STATUS) >> 3; | |
655 | ret = ab8500_charger_max_usb_curr(di, | |
656 | (enum ab8500_charger_link_status) val); | |
657 | ||
658 | return ret; | |
659 | } | |
660 | ||
661 | /** | |
662 | * ab8500_charger_detect_usb_type() - get the type of usb connected | |
663 | * @di: pointer to the ab8500_charger structure | |
664 | * | |
665 | * Detect the type of the plugged USB | |
666 | * Returns error code in case of failure else 0 on success | |
667 | */ | |
668 | static int ab8500_charger_detect_usb_type(struct ab8500_charger *di) | |
669 | { | |
670 | int i, ret; | |
671 | u8 val; | |
672 | ||
673 | /* | |
674 | * On getting the VBUS rising edge detect interrupt there | |
675 | * is a 250ms delay after which the register UsbLineStatus | |
676 | * is filled with valid data. | |
677 | */ | |
678 | for (i = 0; i < 10; i++) { | |
679 | msleep(250); | |
680 | ret = abx500_get_register_interruptible(di->dev, | |
681 | AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, | |
682 | &val); | |
683 | if (ret < 0) { | |
684 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
685 | return ret; | |
686 | } | |
687 | ret = abx500_get_register_interruptible(di->dev, AB8500_USB, | |
688 | AB8500_USB_LINE_STAT_REG, &val); | |
689 | if (ret < 0) { | |
690 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
691 | return ret; | |
692 | } | |
693 | /* | |
694 | * Until the IT source register is read the UsbLineStatus | |
695 | * register is not updated, hence doing the same | |
696 | * Revisit this: | |
697 | */ | |
698 | ||
699 | /* get the USB type */ | |
700 | val = (val & AB8500_USB_LINK_STATUS) >> 3; | |
701 | if (val) | |
702 | break; | |
703 | } | |
704 | ret = ab8500_charger_max_usb_curr(di, | |
705 | (enum ab8500_charger_link_status) val); | |
706 | ||
707 | return ret; | |
708 | } | |
709 | ||
710 | /* | |
711 | * This array maps the raw hex value to charger voltage used by the AB8500 | |
712 | * Values taken from the UM0836 | |
713 | */ | |
714 | static int ab8500_charger_voltage_map[] = { | |
715 | 3500 , | |
716 | 3525 , | |
717 | 3550 , | |
718 | 3575 , | |
719 | 3600 , | |
720 | 3625 , | |
721 | 3650 , | |
722 | 3675 , | |
723 | 3700 , | |
724 | 3725 , | |
725 | 3750 , | |
726 | 3775 , | |
727 | 3800 , | |
728 | 3825 , | |
729 | 3850 , | |
730 | 3875 , | |
731 | 3900 , | |
732 | 3925 , | |
733 | 3950 , | |
734 | 3975 , | |
735 | 4000 , | |
736 | 4025 , | |
737 | 4050 , | |
738 | 4060 , | |
739 | 4070 , | |
740 | 4080 , | |
741 | 4090 , | |
742 | 4100 , | |
743 | 4110 , | |
744 | 4120 , | |
745 | 4130 , | |
746 | 4140 , | |
747 | 4150 , | |
748 | 4160 , | |
749 | 4170 , | |
750 | 4180 , | |
751 | 4190 , | |
752 | 4200 , | |
753 | 4210 , | |
754 | 4220 , | |
755 | 4230 , | |
756 | 4240 , | |
757 | 4250 , | |
758 | 4260 , | |
759 | 4270 , | |
760 | 4280 , | |
761 | 4290 , | |
762 | 4300 , | |
763 | 4310 , | |
764 | 4320 , | |
765 | 4330 , | |
766 | 4340 , | |
767 | 4350 , | |
768 | 4360 , | |
769 | 4370 , | |
770 | 4380 , | |
771 | 4390 , | |
772 | 4400 , | |
773 | 4410 , | |
774 | 4420 , | |
775 | 4430 , | |
776 | 4440 , | |
777 | 4450 , | |
778 | 4460 , | |
779 | 4470 , | |
780 | 4480 , | |
781 | 4490 , | |
782 | 4500 , | |
783 | 4510 , | |
784 | 4520 , | |
785 | 4530 , | |
786 | 4540 , | |
787 | 4550 , | |
788 | 4560 , | |
789 | 4570 , | |
790 | 4580 , | |
791 | 4590 , | |
792 | 4600 , | |
793 | }; | |
794 | ||
795 | /* | |
796 | * This array maps the raw hex value to charger current used by the AB8500 | |
797 | * Values taken from the UM0836 | |
798 | */ | |
799 | static int ab8500_charger_current_map[] = { | |
800 | 100 , | |
801 | 200 , | |
802 | 300 , | |
803 | 400 , | |
804 | 500 , | |
805 | 600 , | |
806 | 700 , | |
807 | 800 , | |
808 | 900 , | |
809 | 1000 , | |
810 | 1100 , | |
811 | 1200 , | |
812 | 1300 , | |
813 | 1400 , | |
814 | 1500 , | |
815 | }; | |
816 | ||
817 | /* | |
818 | * This array maps the raw hex value to VBUS input current used by the AB8500 | |
819 | * Values taken from the UM0836 | |
820 | */ | |
821 | static int ab8500_charger_vbus_in_curr_map[] = { | |
822 | USB_CH_IP_CUR_LVL_0P05, | |
823 | USB_CH_IP_CUR_LVL_0P09, | |
824 | USB_CH_IP_CUR_LVL_0P19, | |
825 | USB_CH_IP_CUR_LVL_0P29, | |
826 | USB_CH_IP_CUR_LVL_0P38, | |
827 | USB_CH_IP_CUR_LVL_0P45, | |
828 | USB_CH_IP_CUR_LVL_0P5, | |
829 | USB_CH_IP_CUR_LVL_0P6, | |
830 | USB_CH_IP_CUR_LVL_0P7, | |
831 | USB_CH_IP_CUR_LVL_0P8, | |
832 | USB_CH_IP_CUR_LVL_0P9, | |
833 | USB_CH_IP_CUR_LVL_1P0, | |
834 | USB_CH_IP_CUR_LVL_1P1, | |
835 | USB_CH_IP_CUR_LVL_1P3, | |
836 | USB_CH_IP_CUR_LVL_1P4, | |
837 | USB_CH_IP_CUR_LVL_1P5, | |
838 | }; | |
839 | ||
840 | static int ab8500_voltage_to_regval(int voltage) | |
841 | { | |
842 | int i; | |
843 | ||
844 | /* Special case for voltage below 3.5V */ | |
845 | if (voltage < ab8500_charger_voltage_map[0]) | |
846 | return LOW_VOLT_REG; | |
847 | ||
848 | for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) { | |
849 | if (voltage < ab8500_charger_voltage_map[i]) | |
850 | return i - 1; | |
851 | } | |
852 | ||
853 | /* If not last element, return error */ | |
854 | i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1; | |
855 | if (voltage == ab8500_charger_voltage_map[i]) | |
856 | return i; | |
857 | else | |
858 | return -1; | |
859 | } | |
860 | ||
861 | static int ab8500_current_to_regval(int curr) | |
862 | { | |
863 | int i; | |
864 | ||
865 | if (curr < ab8500_charger_current_map[0]) | |
866 | return 0; | |
867 | ||
868 | for (i = 0; i < ARRAY_SIZE(ab8500_charger_current_map); i++) { | |
869 | if (curr < ab8500_charger_current_map[i]) | |
870 | return i - 1; | |
871 | } | |
872 | ||
873 | /* If not last element, return error */ | |
874 | i = ARRAY_SIZE(ab8500_charger_current_map) - 1; | |
875 | if (curr == ab8500_charger_current_map[i]) | |
876 | return i; | |
877 | else | |
878 | return -1; | |
879 | } | |
880 | ||
881 | static int ab8500_vbus_in_curr_to_regval(int curr) | |
882 | { | |
883 | int i; | |
884 | ||
885 | if (curr < ab8500_charger_vbus_in_curr_map[0]) | |
886 | return 0; | |
887 | ||
888 | for (i = 0; i < ARRAY_SIZE(ab8500_charger_vbus_in_curr_map); i++) { | |
889 | if (curr < ab8500_charger_vbus_in_curr_map[i]) | |
890 | return i - 1; | |
891 | } | |
892 | ||
893 | /* If not last element, return error */ | |
894 | i = ARRAY_SIZE(ab8500_charger_vbus_in_curr_map) - 1; | |
895 | if (curr == ab8500_charger_vbus_in_curr_map[i]) | |
896 | return i; | |
897 | else | |
898 | return -1; | |
899 | } | |
900 | ||
901 | /** | |
902 | * ab8500_charger_get_usb_cur() - get usb current | |
903 | * @di: pointer to the ab8500_charger structre | |
904 | * | |
905 | * The usb stack provides the maximum current that can be drawn from | |
906 | * the standard usb host. This will be in mA. | |
907 | * This function converts current in mA to a value that can be written | |
908 | * to the register. Returns -1 if charging is not allowed | |
909 | */ | |
910 | static int ab8500_charger_get_usb_cur(struct ab8500_charger *di) | |
911 | { | |
912 | switch (di->usb_state.usb_current) { | |
913 | case 100: | |
914 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P09; | |
915 | break; | |
916 | case 200: | |
917 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P19; | |
918 | break; | |
919 | case 300: | |
920 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P29; | |
921 | break; | |
922 | case 400: | |
923 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P38; | |
924 | break; | |
925 | case 500: | |
926 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5; | |
927 | break; | |
928 | default: | |
929 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05; | |
930 | return -1; | |
931 | break; | |
932 | }; | |
933 | return 0; | |
934 | } | |
935 | ||
936 | /** | |
937 | * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit | |
938 | * @di: pointer to the ab8500_charger structure | |
939 | * @ich_in: charger input current limit | |
940 | * | |
941 | * Sets the current that can be drawn from the USB host | |
942 | * Returns error code in case of failure else 0(on success) | |
943 | */ | |
944 | static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di, | |
945 | int ich_in) | |
946 | { | |
947 | int ret; | |
948 | int input_curr_index; | |
949 | int min_value; | |
950 | ||
951 | /* We should always use to lowest current limit */ | |
952 | min_value = min(di->bat->chg_params->usb_curr_max, ich_in); | |
953 | ||
954 | switch (min_value) { | |
955 | case 100: | |
956 | if (di->vbat < VBAT_TRESH_IP_CUR_RED) | |
957 | min_value = USB_CH_IP_CUR_LVL_0P05; | |
958 | break; | |
959 | case 500: | |
960 | if (di->vbat < VBAT_TRESH_IP_CUR_RED) | |
961 | min_value = USB_CH_IP_CUR_LVL_0P45; | |
962 | break; | |
963 | default: | |
964 | break; | |
965 | } | |
966 | ||
967 | input_curr_index = ab8500_vbus_in_curr_to_regval(min_value); | |
968 | if (input_curr_index < 0) { | |
969 | dev_err(di->dev, "VBUS input current limit too high\n"); | |
970 | return -ENXIO; | |
971 | } | |
972 | ||
973 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
974 | AB8500_USBCH_IPT_CRNTLVL_REG, | |
975 | input_curr_index << VBUS_IN_CURR_LIM_SHIFT); | |
976 | if (ret) | |
977 | dev_err(di->dev, "%s write failed\n", __func__); | |
978 | ||
979 | return ret; | |
980 | } | |
981 | ||
982 | /** | |
983 | * ab8500_charger_led_en() - turn on/off chargign led | |
984 | * @di: pointer to the ab8500_charger structure | |
985 | * @on: flag to turn on/off the chargign led | |
986 | * | |
987 | * Power ON/OFF charging LED indication | |
988 | * Returns error code in case of failure else 0(on success) | |
989 | */ | |
990 | static int ab8500_charger_led_en(struct ab8500_charger *di, int on) | |
991 | { | |
992 | int ret; | |
993 | ||
994 | if (on) { | |
995 | /* Power ON charging LED indicator, set LED current to 5mA */ | |
996 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
997 | AB8500_LED_INDICATOR_PWM_CTRL, | |
998 | (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA)); | |
999 | if (ret) { | |
1000 | dev_err(di->dev, "Power ON LED failed\n"); | |
1001 | return ret; | |
1002 | } | |
1003 | /* LED indicator PWM duty cycle 252/256 */ | |
1004 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1005 | AB8500_LED_INDICATOR_PWM_DUTY, | |
1006 | LED_INDICATOR_PWM_DUTY_252_256); | |
1007 | if (ret) { | |
1008 | dev_err(di->dev, "Set LED PWM duty cycle failed\n"); | |
1009 | return ret; | |
1010 | } | |
1011 | } else { | |
1012 | /* Power off charging LED indicator */ | |
1013 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1014 | AB8500_LED_INDICATOR_PWM_CTRL, | |
1015 | LED_INDICATOR_PWM_DIS); | |
1016 | if (ret) { | |
1017 | dev_err(di->dev, "Power-off LED failed\n"); | |
1018 | return ret; | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | return ret; | |
1023 | } | |
1024 | ||
1025 | /** | |
1026 | * ab8500_charger_ac_en() - enable or disable ac charging | |
1027 | * @di: pointer to the ab8500_charger structure | |
1028 | * @enable: enable/disable flag | |
1029 | * @vset: charging voltage | |
1030 | * @iset: charging current | |
1031 | * | |
1032 | * Enable/Disable AC/Mains charging and turns on/off the charging led | |
1033 | * respectively. | |
1034 | **/ | |
1035 | static int ab8500_charger_ac_en(struct ux500_charger *charger, | |
1036 | int enable, int vset, int iset) | |
1037 | { | |
1038 | int ret; | |
1039 | int volt_index; | |
1040 | int curr_index; | |
1041 | int input_curr_index; | |
1042 | u8 overshoot = 0; | |
1043 | ||
1044 | struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger); | |
1045 | ||
1046 | if (enable) { | |
1047 | /* Check if AC is connected */ | |
1048 | if (!di->ac.charger_connected) { | |
1049 | dev_err(di->dev, "AC charger not connected\n"); | |
1050 | return -ENXIO; | |
1051 | } | |
1052 | ||
1053 | /* Enable AC charging */ | |
1054 | dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset); | |
1055 | ||
1056 | /* | |
1057 | * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts | |
1058 | * will be triggered everytime we enable the VDD ADC supply. | |
1059 | * This will turn off charging for a short while. | |
1060 | * It can be avoided by having the supply on when | |
1061 | * there is a charger enabled. Normally the VDD ADC supply | |
1062 | * is enabled everytime a GPADC conversion is triggered. We will | |
1063 | * force it to be enabled from this driver to have | |
1064 | * the GPADC module independant of the AB8500 chargers | |
1065 | */ | |
1066 | if (!di->vddadc_en_ac) { | |
1067 | regulator_enable(di->regu); | |
1068 | di->vddadc_en_ac = true; | |
1069 | } | |
1070 | ||
1071 | /* Check if the requested voltage or current is valid */ | |
1072 | volt_index = ab8500_voltage_to_regval(vset); | |
1073 | curr_index = ab8500_current_to_regval(iset); | |
1074 | input_curr_index = ab8500_current_to_regval( | |
1075 | di->bat->chg_params->ac_curr_max); | |
1076 | if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) { | |
1077 | dev_err(di->dev, | |
1078 | "Charger voltage or current too high, " | |
1079 | "charging not started\n"); | |
1080 | return -ENXIO; | |
1081 | } | |
1082 | ||
1083 | /* ChVoltLevel: maximum battery charging voltage */ | |
1084 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1085 | AB8500_CH_VOLT_LVL_REG, (u8) volt_index); | |
1086 | if (ret) { | |
1087 | dev_err(di->dev, "%s write failed\n", __func__); | |
1088 | return ret; | |
1089 | } | |
1090 | /* MainChInputCurr: current that can be drawn from the charger*/ | |
1091 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1092 | AB8500_MCH_IPT_CURLVL_REG, | |
1093 | input_curr_index << MAIN_CH_INPUT_CURR_SHIFT); | |
1094 | if (ret) { | |
1095 | dev_err(di->dev, "%s write failed\n", __func__); | |
1096 | return ret; | |
1097 | } | |
1098 | /* ChOutputCurentLevel: protected output current */ | |
1099 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1100 | AB8500_CH_OPT_CRNTLVL_REG, (u8) curr_index); | |
1101 | if (ret) { | |
1102 | dev_err(di->dev, "%s write failed\n", __func__); | |
1103 | return ret; | |
1104 | } | |
1105 | ||
1106 | /* Check if VBAT overshoot control should be enabled */ | |
1107 | if (!di->bat->enable_overshoot) | |
1108 | overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N; | |
1109 | ||
1110 | /* Enable Main Charger */ | |
1111 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1112 | AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot); | |
1113 | if (ret) { | |
1114 | dev_err(di->dev, "%s write failed\n", __func__); | |
1115 | return ret; | |
1116 | } | |
1117 | ||
1118 | /* Power on charging LED indication */ | |
1119 | ret = ab8500_charger_led_en(di, true); | |
1120 | if (ret < 0) | |
1121 | dev_err(di->dev, "failed to enable LED\n"); | |
1122 | ||
1123 | di->ac.charger_online = 1; | |
1124 | } else { | |
1125 | /* Disable AC charging */ | |
1126 | if (is_ab8500_1p1_or_earlier(di->parent)) { | |
1127 | /* | |
1128 | * For ABB revision 1.0 and 1.1 there is a bug in the | |
1129 | * watchdog logic. That means we have to continously | |
1130 | * kick the charger watchdog even when no charger is | |
1131 | * connected. This is only valid once the AC charger | |
1132 | * has been enabled. This is a bug that is not handled | |
1133 | * by the algorithm and the watchdog have to be kicked | |
1134 | * by the charger driver when the AC charger | |
1135 | * is disabled | |
1136 | */ | |
1137 | if (di->ac_conn) { | |
1138 | queue_delayed_work(di->charger_wq, | |
1139 | &di->kick_wd_work, | |
1140 | round_jiffies(WD_KICK_INTERVAL)); | |
1141 | } | |
1142 | ||
1143 | /* | |
1144 | * We can't turn off charging completely | |
1145 | * due to a bug in AB8500 cut1. | |
1146 | * If we do, charging will not start again. | |
1147 | * That is why we set the lowest voltage | |
1148 | * and current possible | |
1149 | */ | |
1150 | ret = abx500_set_register_interruptible(di->dev, | |
1151 | AB8500_CHARGER, | |
1152 | AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5); | |
1153 | if (ret) { | |
1154 | dev_err(di->dev, | |
1155 | "%s write failed\n", __func__); | |
1156 | return ret; | |
1157 | } | |
1158 | ||
1159 | ret = abx500_set_register_interruptible(di->dev, | |
1160 | AB8500_CHARGER, | |
1161 | AB8500_CH_OPT_CRNTLVL_REG, CH_OP_CUR_LVL_0P1); | |
1162 | if (ret) { | |
1163 | dev_err(di->dev, | |
1164 | "%s write failed\n", __func__); | |
1165 | return ret; | |
1166 | } | |
1167 | } else { | |
1168 | ret = abx500_set_register_interruptible(di->dev, | |
1169 | AB8500_CHARGER, | |
1170 | AB8500_MCH_CTRL1, 0); | |
1171 | if (ret) { | |
1172 | dev_err(di->dev, | |
1173 | "%s write failed\n", __func__); | |
1174 | return ret; | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | ret = ab8500_charger_led_en(di, false); | |
1179 | if (ret < 0) | |
1180 | dev_err(di->dev, "failed to disable LED\n"); | |
1181 | ||
1182 | di->ac.charger_online = 0; | |
1183 | di->ac.wd_expired = false; | |
1184 | ||
1185 | /* Disable regulator if enabled */ | |
1186 | if (di->vddadc_en_ac) { | |
1187 | regulator_disable(di->regu); | |
1188 | di->vddadc_en_ac = false; | |
1189 | } | |
1190 | ||
1191 | dev_dbg(di->dev, "%s Disabled AC charging\n", __func__); | |
1192 | } | |
1193 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
1194 | ||
1195 | return ret; | |
1196 | } | |
1197 | ||
1198 | /** | |
1199 | * ab8500_charger_usb_en() - enable usb charging | |
1200 | * @di: pointer to the ab8500_charger structure | |
1201 | * @enable: enable/disable flag | |
1202 | * @vset: charging voltage | |
1203 | * @ich_out: charger output current | |
1204 | * | |
1205 | * Enable/Disable USB charging and turns on/off the charging led respectively. | |
1206 | * Returns error code in case of failure else 0(on success) | |
1207 | */ | |
1208 | static int ab8500_charger_usb_en(struct ux500_charger *charger, | |
1209 | int enable, int vset, int ich_out) | |
1210 | { | |
1211 | int ret; | |
1212 | int volt_index; | |
1213 | int curr_index; | |
1214 | u8 overshoot = 0; | |
1215 | ||
1216 | struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger); | |
1217 | ||
1218 | if (enable) { | |
1219 | /* Check if USB is connected */ | |
1220 | if (!di->usb.charger_connected) { | |
1221 | dev_err(di->dev, "USB charger not connected\n"); | |
1222 | return -ENXIO; | |
1223 | } | |
1224 | ||
1225 | /* | |
1226 | * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts | |
1227 | * will be triggered everytime we enable the VDD ADC supply. | |
1228 | * This will turn off charging for a short while. | |
1229 | * It can be avoided by having the supply on when | |
1230 | * there is a charger enabled. Normally the VDD ADC supply | |
1231 | * is enabled everytime a GPADC conversion is triggered. We will | |
1232 | * force it to be enabled from this driver to have | |
1233 | * the GPADC module independant of the AB8500 chargers | |
1234 | */ | |
1235 | if (!di->vddadc_en_usb) { | |
1236 | regulator_enable(di->regu); | |
1237 | di->vddadc_en_usb = true; | |
1238 | } | |
1239 | ||
1240 | /* Enable USB charging */ | |
1241 | dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out); | |
1242 | ||
1243 | /* Check if the requested voltage or current is valid */ | |
1244 | volt_index = ab8500_voltage_to_regval(vset); | |
1245 | curr_index = ab8500_current_to_regval(ich_out); | |
1246 | if (volt_index < 0 || curr_index < 0) { | |
1247 | dev_err(di->dev, | |
1248 | "Charger voltage or current too high, " | |
1249 | "charging not started\n"); | |
1250 | return -ENXIO; | |
1251 | } | |
1252 | ||
1253 | /* ChVoltLevel: max voltage upto which battery can be charged */ | |
1254 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1255 | AB8500_CH_VOLT_LVL_REG, (u8) volt_index); | |
1256 | if (ret) { | |
1257 | dev_err(di->dev, "%s write failed\n", __func__); | |
1258 | return ret; | |
1259 | } | |
1260 | /* USBChInputCurr: current that can be drawn from the usb */ | |
1261 | ret = ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr); | |
1262 | if (ret) { | |
1263 | dev_err(di->dev, "setting USBChInputCurr failed\n"); | |
1264 | return ret; | |
1265 | } | |
1266 | /* ChOutputCurentLevel: protected output current */ | |
1267 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1268 | AB8500_CH_OPT_CRNTLVL_REG, (u8) curr_index); | |
1269 | if (ret) { | |
1270 | dev_err(di->dev, "%s write failed\n", __func__); | |
1271 | return ret; | |
1272 | } | |
1273 | /* Check if VBAT overshoot control should be enabled */ | |
1274 | if (!di->bat->enable_overshoot) | |
1275 | overshoot = USB_CHG_NO_OVERSHOOT_ENA_N; | |
1276 | ||
1277 | /* Enable USB Charger */ | |
1278 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1279 | AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot); | |
1280 | if (ret) { | |
1281 | dev_err(di->dev, "%s write failed\n", __func__); | |
1282 | return ret; | |
1283 | } | |
1284 | ||
1285 | /* If success power on charging LED indication */ | |
1286 | ret = ab8500_charger_led_en(di, true); | |
1287 | if (ret < 0) | |
1288 | dev_err(di->dev, "failed to enable LED\n"); | |
1289 | ||
1290 | queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ); | |
1291 | ||
1292 | di->usb.charger_online = 1; | |
1293 | } else { | |
1294 | /* Disable USB charging */ | |
1295 | ret = abx500_set_register_interruptible(di->dev, | |
1296 | AB8500_CHARGER, | |
1297 | AB8500_USBCH_CTRL1_REG, 0); | |
1298 | if (ret) { | |
1299 | dev_err(di->dev, | |
1300 | "%s write failed\n", __func__); | |
1301 | return ret; | |
1302 | } | |
1303 | ||
1304 | ret = ab8500_charger_led_en(di, false); | |
1305 | if (ret < 0) | |
1306 | dev_err(di->dev, "failed to disable LED\n"); | |
1307 | ||
1308 | di->usb.charger_online = 0; | |
1309 | di->usb.wd_expired = false; | |
1310 | ||
1311 | /* Disable regulator if enabled */ | |
1312 | if (di->vddadc_en_usb) { | |
1313 | regulator_disable(di->regu); | |
1314 | di->vddadc_en_usb = false; | |
1315 | } | |
1316 | ||
1317 | dev_dbg(di->dev, "%s Disabled USB charging\n", __func__); | |
1318 | ||
1319 | /* Cancel any pending Vbat check work */ | |
1320 | if (delayed_work_pending(&di->check_vbat_work)) | |
1321 | cancel_delayed_work(&di->check_vbat_work); | |
1322 | ||
1323 | } | |
1324 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
1325 | ||
1326 | return ret; | |
1327 | } | |
1328 | ||
1329 | /** | |
1330 | * ab8500_charger_watchdog_kick() - kick charger watchdog | |
1331 | * @di: pointer to the ab8500_charger structure | |
1332 | * | |
1333 | * Kick charger watchdog | |
1334 | * Returns error code in case of failure else 0(on success) | |
1335 | */ | |
1336 | static int ab8500_charger_watchdog_kick(struct ux500_charger *charger) | |
1337 | { | |
1338 | int ret; | |
1339 | struct ab8500_charger *di; | |
1340 | ||
1341 | if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS) | |
1342 | di = to_ab8500_charger_ac_device_info(charger); | |
1343 | else if (charger->psy.type == POWER_SUPPLY_TYPE_USB) | |
1344 | di = to_ab8500_charger_usb_device_info(charger); | |
1345 | else | |
1346 | return -ENXIO; | |
1347 | ||
1348 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1349 | AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); | |
1350 | if (ret) | |
1351 | dev_err(di->dev, "Failed to kick WD!\n"); | |
1352 | ||
1353 | return ret; | |
1354 | } | |
1355 | ||
1356 | /** | |
1357 | * ab8500_charger_update_charger_current() - update charger current | |
1358 | * @di: pointer to the ab8500_charger structure | |
1359 | * | |
1360 | * Update the charger output current for the specified charger | |
1361 | * Returns error code in case of failure else 0(on success) | |
1362 | */ | |
1363 | static int ab8500_charger_update_charger_current(struct ux500_charger *charger, | |
1364 | int ich_out) | |
1365 | { | |
1366 | int ret; | |
1367 | int curr_index; | |
1368 | struct ab8500_charger *di; | |
1369 | ||
1370 | if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS) | |
1371 | di = to_ab8500_charger_ac_device_info(charger); | |
1372 | else if (charger->psy.type == POWER_SUPPLY_TYPE_USB) | |
1373 | di = to_ab8500_charger_usb_device_info(charger); | |
1374 | else | |
1375 | return -ENXIO; | |
1376 | ||
1377 | curr_index = ab8500_current_to_regval(ich_out); | |
1378 | if (curr_index < 0) { | |
1379 | dev_err(di->dev, | |
1380 | "Charger current too high, " | |
1381 | "charging not started\n"); | |
1382 | return -ENXIO; | |
1383 | } | |
1384 | ||
1385 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1386 | AB8500_CH_OPT_CRNTLVL_REG, (u8) curr_index); | |
1387 | if (ret) { | |
1388 | dev_err(di->dev, "%s write failed\n", __func__); | |
1389 | return ret; | |
1390 | } | |
1391 | ||
1392 | /* Reset the main and usb drop input current measurement counter */ | |
1393 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1394 | AB8500_CHARGER_CTRL, | |
1395 | 0x1); | |
1396 | if (ret) { | |
1397 | dev_err(di->dev, "%s write failed\n", __func__); | |
1398 | return ret; | |
1399 | } | |
1400 | ||
1401 | return ret; | |
1402 | } | |
1403 | ||
1404 | static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data) | |
1405 | { | |
1406 | struct power_supply *psy; | |
1407 | struct power_supply *ext; | |
1408 | struct ab8500_charger *di; | |
1409 | union power_supply_propval ret; | |
1410 | int i, j; | |
1411 | bool psy_found = false; | |
1412 | struct ux500_charger *usb_chg; | |
1413 | ||
1414 | usb_chg = (struct ux500_charger *)data; | |
1415 | psy = &usb_chg->psy; | |
1416 | ||
1417 | di = to_ab8500_charger_usb_device_info(usb_chg); | |
1418 | ||
1419 | ext = dev_get_drvdata(dev); | |
1420 | ||
1421 | /* For all psy where the driver name appears in any supplied_to */ | |
1422 | for (i = 0; i < ext->num_supplicants; i++) { | |
1423 | if (!strcmp(ext->supplied_to[i], psy->name)) | |
1424 | psy_found = true; | |
1425 | } | |
1426 | ||
1427 | if (!psy_found) | |
1428 | return 0; | |
1429 | ||
1430 | /* Go through all properties for the psy */ | |
1431 | for (j = 0; j < ext->num_properties; j++) { | |
1432 | enum power_supply_property prop; | |
1433 | prop = ext->properties[j]; | |
1434 | ||
1435 | if (ext->get_property(ext, prop, &ret)) | |
1436 | continue; | |
1437 | ||
1438 | switch (prop) { | |
1439 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
1440 | switch (ext->type) { | |
1441 | case POWER_SUPPLY_TYPE_BATTERY: | |
1442 | di->vbat = ret.intval / 1000; | |
1443 | break; | |
1444 | default: | |
1445 | break; | |
1446 | } | |
1447 | break; | |
1448 | default: | |
1449 | break; | |
1450 | } | |
1451 | } | |
1452 | return 0; | |
1453 | } | |
1454 | ||
1455 | /** | |
1456 | * ab8500_charger_check_vbat_work() - keep vbus current within spec | |
1457 | * @work pointer to the work_struct structure | |
1458 | * | |
1459 | * Due to a asic bug it is necessary to lower the input current to the vbus | |
1460 | * charger when charging with at some specific levels. This issue is only valid | |
1461 | * for below a certain battery voltage. This function makes sure that the | |
1462 | * the allowed current limit isn't exceeded. | |
1463 | */ | |
1464 | static void ab8500_charger_check_vbat_work(struct work_struct *work) | |
1465 | { | |
1466 | int t = 10; | |
1467 | struct ab8500_charger *di = container_of(work, | |
1468 | struct ab8500_charger, check_vbat_work.work); | |
1469 | ||
1470 | class_for_each_device(power_supply_class, NULL, | |
1471 | &di->usb_chg.psy, ab8500_charger_get_ext_psy_data); | |
1472 | ||
1473 | /* First run old_vbat is 0. */ | |
1474 | if (di->old_vbat == 0) | |
1475 | di->old_vbat = di->vbat; | |
1476 | ||
1477 | if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED && | |
1478 | di->vbat <= VBAT_TRESH_IP_CUR_RED) || | |
1479 | (di->old_vbat > VBAT_TRESH_IP_CUR_RED && | |
1480 | di->vbat > VBAT_TRESH_IP_CUR_RED))) { | |
1481 | ||
1482 | dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d," | |
1483 | " old: %d\n", di->max_usb_in_curr, di->vbat, | |
1484 | di->old_vbat); | |
1485 | ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr); | |
1486 | power_supply_changed(&di->usb_chg.psy); | |
1487 | } | |
1488 | ||
1489 | di->old_vbat = di->vbat; | |
1490 | ||
1491 | /* | |
1492 | * No need to check the battery voltage every second when not close to | |
1493 | * the threshold. | |
1494 | */ | |
1495 | if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) && | |
1496 | (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100))) | |
1497 | t = 1; | |
1498 | ||
1499 | queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ); | |
1500 | } | |
1501 | ||
1502 | /** | |
1503 | * ab8500_charger_check_hw_failure_work() - check main charger failure | |
1504 | * @work: pointer to the work_struct structure | |
1505 | * | |
1506 | * Work queue function for checking the main charger status | |
1507 | */ | |
1508 | static void ab8500_charger_check_hw_failure_work(struct work_struct *work) | |
1509 | { | |
1510 | int ret; | |
1511 | u8 reg_value; | |
1512 | ||
1513 | struct ab8500_charger *di = container_of(work, | |
1514 | struct ab8500_charger, check_hw_failure_work.work); | |
1515 | ||
1516 | /* Check if the status bits for HW failure is still active */ | |
1517 | if (di->flags.mainextchnotok) { | |
1518 | ret = abx500_get_register_interruptible(di->dev, | |
1519 | AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value); | |
1520 | if (ret < 0) { | |
1521 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1522 | return; | |
1523 | } | |
1524 | if (!(reg_value & MAIN_CH_NOK)) { | |
1525 | di->flags.mainextchnotok = false; | |
1526 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
1527 | } | |
1528 | } | |
1529 | if (di->flags.vbus_ovv) { | |
1530 | ret = abx500_get_register_interruptible(di->dev, | |
1531 | AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, | |
1532 | ®_value); | |
1533 | if (ret < 0) { | |
1534 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1535 | return; | |
1536 | } | |
1537 | if (!(reg_value & VBUS_OVV_TH)) { | |
1538 | di->flags.vbus_ovv = false; | |
1539 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
1540 | } | |
1541 | } | |
1542 | /* If we still have a failure, schedule a new check */ | |
1543 | if (di->flags.mainextchnotok || di->flags.vbus_ovv) { | |
1544 | queue_delayed_work(di->charger_wq, | |
1545 | &di->check_hw_failure_work, round_jiffies(HZ)); | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | /** | |
1550 | * ab8500_charger_kick_watchdog_work() - kick the watchdog | |
1551 | * @work: pointer to the work_struct structure | |
1552 | * | |
1553 | * Work queue function for kicking the charger watchdog. | |
1554 | * | |
1555 | * For ABB revision 1.0 and 1.1 there is a bug in the watchdog | |
1556 | * logic. That means we have to continously kick the charger | |
1557 | * watchdog even when no charger is connected. This is only | |
1558 | * valid once the AC charger has been enabled. This is | |
1559 | * a bug that is not handled by the algorithm and the | |
1560 | * watchdog have to be kicked by the charger driver | |
1561 | * when the AC charger is disabled | |
1562 | */ | |
1563 | static void ab8500_charger_kick_watchdog_work(struct work_struct *work) | |
1564 | { | |
1565 | int ret; | |
1566 | ||
1567 | struct ab8500_charger *di = container_of(work, | |
1568 | struct ab8500_charger, kick_wd_work.work); | |
1569 | ||
1570 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1571 | AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); | |
1572 | if (ret) | |
1573 | dev_err(di->dev, "Failed to kick WD!\n"); | |
1574 | ||
1575 | /* Schedule a new watchdog kick */ | |
1576 | queue_delayed_work(di->charger_wq, | |
1577 | &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL)); | |
1578 | } | |
1579 | ||
1580 | /** | |
1581 | * ab8500_charger_ac_work() - work to get and set main charger status | |
1582 | * @work: pointer to the work_struct structure | |
1583 | * | |
1584 | * Work queue function for checking the main charger status | |
1585 | */ | |
1586 | static void ab8500_charger_ac_work(struct work_struct *work) | |
1587 | { | |
1588 | int ret; | |
1589 | ||
1590 | struct ab8500_charger *di = container_of(work, | |
1591 | struct ab8500_charger, ac_work); | |
1592 | ||
1593 | /* | |
1594 | * Since we can't be sure that the events are received | |
1595 | * synchronously, we have the check if the main charger is | |
1596 | * connected by reading the status register | |
1597 | */ | |
1598 | ret = ab8500_charger_detect_chargers(di); | |
1599 | if (ret < 0) | |
1600 | return; | |
1601 | ||
1602 | if (ret & AC_PW_CONN) { | |
1603 | di->ac.charger_connected = 1; | |
1604 | di->ac_conn = true; | |
1605 | } else { | |
1606 | di->ac.charger_connected = 0; | |
1607 | } | |
1608 | ||
1609 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
1610 | sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present"); | |
1611 | } | |
1612 | ||
1613 | /** | |
1614 | * ab8500_charger_detect_usb_type_work() - work to detect USB type | |
1615 | * @work: Pointer to the work_struct structure | |
1616 | * | |
1617 | * Detect the type of USB plugged | |
1618 | */ | |
64eb9b02 | 1619 | static void ab8500_charger_detect_usb_type_work(struct work_struct *work) |
84edbeea AM |
1620 | { |
1621 | int ret; | |
1622 | ||
1623 | struct ab8500_charger *di = container_of(work, | |
1624 | struct ab8500_charger, detect_usb_type_work); | |
1625 | ||
1626 | /* | |
1627 | * Since we can't be sure that the events are received | |
1628 | * synchronously, we have the check if is | |
1629 | * connected by reading the status register | |
1630 | */ | |
1631 | ret = ab8500_charger_detect_chargers(di); | |
1632 | if (ret < 0) | |
1633 | return; | |
1634 | ||
1635 | if (!(ret & USB_PW_CONN)) { | |
1636 | di->vbus_detected = 0; | |
1637 | ab8500_charger_set_usb_connected(di, false); | |
1638 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
1639 | } else { | |
1640 | di->vbus_detected = 1; | |
1641 | ||
1642 | if (is_ab8500_1p1_or_earlier(di->parent)) { | |
1643 | ret = ab8500_charger_detect_usb_type(di); | |
1644 | if (!ret) { | |
1645 | ab8500_charger_set_usb_connected(di, true); | |
1646 | ab8500_power_supply_changed(di, | |
1647 | &di->usb_chg.psy); | |
1648 | } | |
1649 | } else { | |
1650 | /* For ABB cut2.0 and onwards we have an IRQ, | |
1651 | * USB_LINK_STATUS that will be triggered when the USB | |
1652 | * link status changes. The exception is USB connected | |
1653 | * during startup. Then we don't get a | |
1654 | * USB_LINK_STATUS IRQ | |
1655 | */ | |
1656 | if (di->vbus_detected_start) { | |
1657 | di->vbus_detected_start = false; | |
1658 | ret = ab8500_charger_detect_usb_type(di); | |
1659 | if (!ret) { | |
1660 | ab8500_charger_set_usb_connected(di, | |
1661 | true); | |
1662 | ab8500_power_supply_changed(di, | |
1663 | &di->usb_chg.psy); | |
1664 | } | |
1665 | } | |
1666 | } | |
1667 | } | |
1668 | } | |
1669 | ||
1670 | /** | |
1671 | * ab8500_charger_usb_link_status_work() - work to detect USB type | |
1672 | * @work: pointer to the work_struct structure | |
1673 | * | |
1674 | * Detect the type of USB plugged | |
1675 | */ | |
1676 | static void ab8500_charger_usb_link_status_work(struct work_struct *work) | |
1677 | { | |
1678 | int ret; | |
1679 | ||
1680 | struct ab8500_charger *di = container_of(work, | |
1681 | struct ab8500_charger, usb_link_status_work); | |
1682 | ||
1683 | /* | |
1684 | * Since we can't be sure that the events are received | |
1685 | * synchronously, we have the check if is | |
1686 | * connected by reading the status register | |
1687 | */ | |
1688 | ret = ab8500_charger_detect_chargers(di); | |
1689 | if (ret < 0) | |
1690 | return; | |
1691 | ||
1692 | if (!(ret & USB_PW_CONN)) { | |
1693 | di->vbus_detected = 0; | |
1694 | ab8500_charger_set_usb_connected(di, false); | |
1695 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
1696 | } else { | |
1697 | di->vbus_detected = 1; | |
1698 | ret = ab8500_charger_read_usb_type(di); | |
1699 | if (!ret) { | |
1700 | /* Update maximum input current */ | |
1701 | ret = ab8500_charger_set_vbus_in_curr(di, | |
1702 | di->max_usb_in_curr); | |
1703 | if (ret) | |
1704 | return; | |
1705 | ||
1706 | ab8500_charger_set_usb_connected(di, true); | |
1707 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
1708 | } else if (ret == -ENXIO) { | |
1709 | /* No valid charger type detected */ | |
1710 | ab8500_charger_set_usb_connected(di, false); | |
1711 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
1712 | } | |
1713 | } | |
1714 | } | |
1715 | ||
1716 | static void ab8500_charger_usb_state_changed_work(struct work_struct *work) | |
1717 | { | |
1718 | int ret; | |
1719 | unsigned long flags; | |
1720 | ||
1721 | struct ab8500_charger *di = container_of(work, | |
1722 | struct ab8500_charger, usb_state_changed_work); | |
1723 | ||
1724 | if (!di->vbus_detected) | |
1725 | return; | |
1726 | ||
1727 | spin_lock_irqsave(&di->usb_state.usb_lock, flags); | |
1728 | di->usb_state.usb_changed = false; | |
1729 | spin_unlock_irqrestore(&di->usb_state.usb_lock, flags); | |
1730 | ||
1731 | /* | |
1732 | * wait for some time until you get updates from the usb stack | |
1733 | * and negotiations are completed | |
1734 | */ | |
1735 | msleep(250); | |
1736 | ||
1737 | if (di->usb_state.usb_changed) | |
1738 | return; | |
1739 | ||
1740 | dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n", | |
1741 | __func__, di->usb_state.state, di->usb_state.usb_current); | |
1742 | ||
1743 | switch (di->usb_state.state) { | |
1744 | case AB8500_BM_USB_STATE_RESET_HS: | |
1745 | case AB8500_BM_USB_STATE_RESET_FS: | |
1746 | case AB8500_BM_USB_STATE_SUSPEND: | |
1747 | case AB8500_BM_USB_STATE_MAX: | |
1748 | ab8500_charger_set_usb_connected(di, false); | |
1749 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
1750 | break; | |
1751 | ||
1752 | case AB8500_BM_USB_STATE_RESUME: | |
1753 | /* | |
1754 | * when suspend->resume there should be delay | |
1755 | * of 1sec for enabling charging | |
1756 | */ | |
1757 | msleep(1000); | |
1758 | /* Intentional fall through */ | |
1759 | case AB8500_BM_USB_STATE_CONFIGURED: | |
1760 | /* | |
1761 | * USB is configured, enable charging with the charging | |
1762 | * input current obtained from USB driver | |
1763 | */ | |
1764 | if (!ab8500_charger_get_usb_cur(di)) { | |
1765 | /* Update maximum input current */ | |
1766 | ret = ab8500_charger_set_vbus_in_curr(di, | |
1767 | di->max_usb_in_curr); | |
1768 | if (ret) | |
1769 | return; | |
1770 | ||
1771 | ab8500_charger_set_usb_connected(di, true); | |
1772 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
1773 | } | |
1774 | break; | |
1775 | ||
1776 | default: | |
1777 | break; | |
1778 | }; | |
1779 | } | |
1780 | ||
1781 | /** | |
1782 | * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status | |
1783 | * @work: pointer to the work_struct structure | |
1784 | * | |
1785 | * Work queue function for checking the USB charger Not OK status | |
1786 | */ | |
1787 | static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work) | |
1788 | { | |
1789 | int ret; | |
1790 | u8 reg_value; | |
1791 | bool prev_status; | |
1792 | ||
1793 | struct ab8500_charger *di = container_of(work, | |
1794 | struct ab8500_charger, check_usbchgnotok_work.work); | |
1795 | ||
1796 | /* Check if the status bit for usbchargernotok is still active */ | |
1797 | ret = abx500_get_register_interruptible(di->dev, | |
1798 | AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value); | |
1799 | if (ret < 0) { | |
1800 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1801 | return; | |
1802 | } | |
1803 | prev_status = di->flags.usbchargernotok; | |
1804 | ||
1805 | if (reg_value & VBUS_CH_NOK) { | |
1806 | di->flags.usbchargernotok = true; | |
1807 | /* Check again in 1sec */ | |
1808 | queue_delayed_work(di->charger_wq, | |
1809 | &di->check_usbchgnotok_work, HZ); | |
1810 | } else { | |
1811 | di->flags.usbchargernotok = false; | |
1812 | di->flags.vbus_collapse = false; | |
1813 | } | |
1814 | ||
1815 | if (prev_status != di->flags.usbchargernotok) | |
1816 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
1817 | } | |
1818 | ||
1819 | /** | |
1820 | * ab8500_charger_check_main_thermal_prot_work() - check main thermal status | |
1821 | * @work: pointer to the work_struct structure | |
1822 | * | |
1823 | * Work queue function for checking the Main thermal prot status | |
1824 | */ | |
1825 | static void ab8500_charger_check_main_thermal_prot_work( | |
1826 | struct work_struct *work) | |
1827 | { | |
1828 | int ret; | |
1829 | u8 reg_value; | |
1830 | ||
1831 | struct ab8500_charger *di = container_of(work, | |
1832 | struct ab8500_charger, check_main_thermal_prot_work); | |
1833 | ||
1834 | /* Check if the status bit for main_thermal_prot is still active */ | |
1835 | ret = abx500_get_register_interruptible(di->dev, | |
1836 | AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value); | |
1837 | if (ret < 0) { | |
1838 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1839 | return; | |
1840 | } | |
1841 | if (reg_value & MAIN_CH_TH_PROT) | |
1842 | di->flags.main_thermal_prot = true; | |
1843 | else | |
1844 | di->flags.main_thermal_prot = false; | |
1845 | ||
1846 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
1847 | } | |
1848 | ||
1849 | /** | |
1850 | * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status | |
1851 | * @work: pointer to the work_struct structure | |
1852 | * | |
1853 | * Work queue function for checking the USB thermal prot status | |
1854 | */ | |
1855 | static void ab8500_charger_check_usb_thermal_prot_work( | |
1856 | struct work_struct *work) | |
1857 | { | |
1858 | int ret; | |
1859 | u8 reg_value; | |
1860 | ||
1861 | struct ab8500_charger *di = container_of(work, | |
1862 | struct ab8500_charger, check_usb_thermal_prot_work); | |
1863 | ||
1864 | /* Check if the status bit for usb_thermal_prot is still active */ | |
1865 | ret = abx500_get_register_interruptible(di->dev, | |
1866 | AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value); | |
1867 | if (ret < 0) { | |
1868 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1869 | return; | |
1870 | } | |
1871 | if (reg_value & USB_CH_TH_PROT) | |
1872 | di->flags.usb_thermal_prot = true; | |
1873 | else | |
1874 | di->flags.usb_thermal_prot = false; | |
1875 | ||
1876 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
1877 | } | |
1878 | ||
1879 | /** | |
1880 | * ab8500_charger_mainchunplugdet_handler() - main charger unplugged | |
1881 | * @irq: interrupt number | |
1882 | * @_di: pointer to the ab8500_charger structure | |
1883 | * | |
1884 | * Returns IRQ status(IRQ_HANDLED) | |
1885 | */ | |
1886 | static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di) | |
1887 | { | |
1888 | struct ab8500_charger *di = _di; | |
1889 | ||
1890 | dev_dbg(di->dev, "Main charger unplugged\n"); | |
1891 | queue_work(di->charger_wq, &di->ac_work); | |
1892 | ||
1893 | return IRQ_HANDLED; | |
1894 | } | |
1895 | ||
1896 | /** | |
1897 | * ab8500_charger_mainchplugdet_handler() - main charger plugged | |
1898 | * @irq: interrupt number | |
1899 | * @_di: pointer to the ab8500_charger structure | |
1900 | * | |
1901 | * Returns IRQ status(IRQ_HANDLED) | |
1902 | */ | |
1903 | static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di) | |
1904 | { | |
1905 | struct ab8500_charger *di = _di; | |
1906 | ||
1907 | dev_dbg(di->dev, "Main charger plugged\n"); | |
1908 | queue_work(di->charger_wq, &di->ac_work); | |
1909 | ||
1910 | return IRQ_HANDLED; | |
1911 | } | |
1912 | ||
1913 | /** | |
1914 | * ab8500_charger_mainextchnotok_handler() - main charger not ok | |
1915 | * @irq: interrupt number | |
1916 | * @_di: pointer to the ab8500_charger structure | |
1917 | * | |
1918 | * Returns IRQ status(IRQ_HANDLED) | |
1919 | */ | |
1920 | static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di) | |
1921 | { | |
1922 | struct ab8500_charger *di = _di; | |
1923 | ||
1924 | dev_dbg(di->dev, "Main charger not ok\n"); | |
1925 | di->flags.mainextchnotok = true; | |
1926 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
1927 | ||
1928 | /* Schedule a new HW failure check */ | |
1929 | queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); | |
1930 | ||
1931 | return IRQ_HANDLED; | |
1932 | } | |
1933 | ||
1934 | /** | |
1935 | * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger | |
1936 | * thermal protection threshold | |
1937 | * @irq: interrupt number | |
1938 | * @_di: pointer to the ab8500_charger structure | |
1939 | * | |
1940 | * Returns IRQ status(IRQ_HANDLED) | |
1941 | */ | |
1942 | static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di) | |
1943 | { | |
1944 | struct ab8500_charger *di = _di; | |
1945 | ||
1946 | dev_dbg(di->dev, | |
1947 | "Die temp above Main charger thermal protection threshold\n"); | |
1948 | queue_work(di->charger_wq, &di->check_main_thermal_prot_work); | |
1949 | ||
1950 | return IRQ_HANDLED; | |
1951 | } | |
1952 | ||
1953 | /** | |
1954 | * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger | |
1955 | * thermal protection threshold | |
1956 | * @irq: interrupt number | |
1957 | * @_di: pointer to the ab8500_charger structure | |
1958 | * | |
1959 | * Returns IRQ status(IRQ_HANDLED) | |
1960 | */ | |
1961 | static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di) | |
1962 | { | |
1963 | struct ab8500_charger *di = _di; | |
1964 | ||
1965 | dev_dbg(di->dev, | |
1966 | "Die temp ok for Main charger thermal protection threshold\n"); | |
1967 | queue_work(di->charger_wq, &di->check_main_thermal_prot_work); | |
1968 | ||
1969 | return IRQ_HANDLED; | |
1970 | } | |
1971 | ||
1972 | /** | |
1973 | * ab8500_charger_vbusdetf_handler() - VBUS falling detected | |
1974 | * @irq: interrupt number | |
1975 | * @_di: pointer to the ab8500_charger structure | |
1976 | * | |
1977 | * Returns IRQ status(IRQ_HANDLED) | |
1978 | */ | |
1979 | static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di) | |
1980 | { | |
1981 | struct ab8500_charger *di = _di; | |
1982 | ||
1983 | dev_dbg(di->dev, "VBUS falling detected\n"); | |
1984 | queue_work(di->charger_wq, &di->detect_usb_type_work); | |
1985 | ||
1986 | return IRQ_HANDLED; | |
1987 | } | |
1988 | ||
1989 | /** | |
1990 | * ab8500_charger_vbusdetr_handler() - VBUS rising detected | |
1991 | * @irq: interrupt number | |
1992 | * @_di: pointer to the ab8500_charger structure | |
1993 | * | |
1994 | * Returns IRQ status(IRQ_HANDLED) | |
1995 | */ | |
1996 | static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di) | |
1997 | { | |
1998 | struct ab8500_charger *di = _di; | |
1999 | ||
2000 | di->vbus_detected = true; | |
2001 | dev_dbg(di->dev, "VBUS rising detected\n"); | |
2002 | queue_work(di->charger_wq, &di->detect_usb_type_work); | |
2003 | ||
2004 | return IRQ_HANDLED; | |
2005 | } | |
2006 | ||
2007 | /** | |
2008 | * ab8500_charger_usblinkstatus_handler() - USB link status has changed | |
2009 | * @irq: interrupt number | |
2010 | * @_di: pointer to the ab8500_charger structure | |
2011 | * | |
2012 | * Returns IRQ status(IRQ_HANDLED) | |
2013 | */ | |
2014 | static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di) | |
2015 | { | |
2016 | struct ab8500_charger *di = _di; | |
2017 | ||
2018 | dev_dbg(di->dev, "USB link status changed\n"); | |
2019 | ||
2020 | queue_work(di->charger_wq, &di->usb_link_status_work); | |
2021 | ||
2022 | return IRQ_HANDLED; | |
2023 | } | |
2024 | ||
2025 | /** | |
2026 | * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger | |
2027 | * thermal protection threshold | |
2028 | * @irq: interrupt number | |
2029 | * @_di: pointer to the ab8500_charger structure | |
2030 | * | |
2031 | * Returns IRQ status(IRQ_HANDLED) | |
2032 | */ | |
2033 | static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di) | |
2034 | { | |
2035 | struct ab8500_charger *di = _di; | |
2036 | ||
2037 | dev_dbg(di->dev, | |
2038 | "Die temp above USB charger thermal protection threshold\n"); | |
2039 | queue_work(di->charger_wq, &di->check_usb_thermal_prot_work); | |
2040 | ||
2041 | return IRQ_HANDLED; | |
2042 | } | |
2043 | ||
2044 | /** | |
2045 | * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger | |
2046 | * thermal protection threshold | |
2047 | * @irq: interrupt number | |
2048 | * @_di: pointer to the ab8500_charger structure | |
2049 | * | |
2050 | * Returns IRQ status(IRQ_HANDLED) | |
2051 | */ | |
2052 | static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di) | |
2053 | { | |
2054 | struct ab8500_charger *di = _di; | |
2055 | ||
2056 | dev_dbg(di->dev, | |
2057 | "Die temp ok for USB charger thermal protection threshold\n"); | |
2058 | queue_work(di->charger_wq, &di->check_usb_thermal_prot_work); | |
2059 | ||
2060 | return IRQ_HANDLED; | |
2061 | } | |
2062 | ||
2063 | /** | |
2064 | * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected | |
2065 | * @irq: interrupt number | |
2066 | * @_di: pointer to the ab8500_charger structure | |
2067 | * | |
2068 | * Returns IRQ status(IRQ_HANDLED) | |
2069 | */ | |
2070 | static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di) | |
2071 | { | |
2072 | struct ab8500_charger *di = _di; | |
2073 | ||
2074 | dev_dbg(di->dev, "Not allowed USB charger detected\n"); | |
2075 | queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0); | |
2076 | ||
2077 | return IRQ_HANDLED; | |
2078 | } | |
2079 | ||
2080 | /** | |
2081 | * ab8500_charger_chwdexp_handler() - Charger watchdog expired | |
2082 | * @irq: interrupt number | |
2083 | * @_di: pointer to the ab8500_charger structure | |
2084 | * | |
2085 | * Returns IRQ status(IRQ_HANDLED) | |
2086 | */ | |
2087 | static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di) | |
2088 | { | |
2089 | struct ab8500_charger *di = _di; | |
2090 | ||
2091 | dev_dbg(di->dev, "Charger watchdog expired\n"); | |
2092 | ||
2093 | /* | |
2094 | * The charger that was online when the watchdog expired | |
2095 | * needs to be restarted for charging to start again | |
2096 | */ | |
2097 | if (di->ac.charger_online) { | |
2098 | di->ac.wd_expired = true; | |
2099 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
2100 | } | |
2101 | if (di->usb.charger_online) { | |
2102 | di->usb.wd_expired = true; | |
2103 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2104 | } | |
2105 | ||
2106 | return IRQ_HANDLED; | |
2107 | } | |
2108 | ||
2109 | /** | |
2110 | * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected | |
2111 | * @irq: interrupt number | |
2112 | * @_di: pointer to the ab8500_charger structure | |
2113 | * | |
2114 | * Returns IRQ status(IRQ_HANDLED) | |
2115 | */ | |
2116 | static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di) | |
2117 | { | |
2118 | struct ab8500_charger *di = _di; | |
2119 | ||
2120 | dev_dbg(di->dev, "VBUS overvoltage detected\n"); | |
2121 | di->flags.vbus_ovv = true; | |
2122 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2123 | ||
2124 | /* Schedule a new HW failure check */ | |
2125 | queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); | |
2126 | ||
2127 | return IRQ_HANDLED; | |
2128 | } | |
2129 | ||
2130 | /** | |
2131 | * ab8500_charger_ac_get_property() - get the ac/mains properties | |
2132 | * @psy: pointer to the power_supply structure | |
2133 | * @psp: pointer to the power_supply_property structure | |
2134 | * @val: pointer to the power_supply_propval union | |
2135 | * | |
2136 | * This function gets called when an application tries to get the ac/mains | |
2137 | * properties by reading the sysfs files. | |
2138 | * AC/Mains properties are online, present and voltage. | |
2139 | * online: ac/mains charging is in progress or not | |
2140 | * present: presence of the ac/mains | |
2141 | * voltage: AC/Mains voltage | |
2142 | * Returns error code in case of failure else 0(on success) | |
2143 | */ | |
2144 | static int ab8500_charger_ac_get_property(struct power_supply *psy, | |
2145 | enum power_supply_property psp, | |
2146 | union power_supply_propval *val) | |
2147 | { | |
2148 | struct ab8500_charger *di; | |
2149 | ||
2150 | di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy)); | |
2151 | ||
2152 | switch (psp) { | |
2153 | case POWER_SUPPLY_PROP_HEALTH: | |
2154 | if (di->flags.mainextchnotok) | |
2155 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
2156 | else if (di->ac.wd_expired || di->usb.wd_expired) | |
2157 | val->intval = POWER_SUPPLY_HEALTH_DEAD; | |
2158 | else if (di->flags.main_thermal_prot) | |
2159 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
2160 | else | |
2161 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
2162 | break; | |
2163 | case POWER_SUPPLY_PROP_ONLINE: | |
2164 | val->intval = di->ac.charger_online; | |
2165 | break; | |
2166 | case POWER_SUPPLY_PROP_PRESENT: | |
2167 | val->intval = di->ac.charger_connected; | |
2168 | break; | |
2169 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
2170 | di->ac.charger_voltage = ab8500_charger_get_ac_voltage(di); | |
2171 | val->intval = di->ac.charger_voltage * 1000; | |
2172 | break; | |
2173 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
2174 | /* | |
2175 | * This property is used to indicate when CV mode is entered | |
2176 | * for the AC charger | |
2177 | */ | |
2178 | di->ac.cv_active = ab8500_charger_ac_cv(di); | |
2179 | val->intval = di->ac.cv_active; | |
2180 | break; | |
2181 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
2182 | val->intval = ab8500_charger_get_ac_current(di) * 1000; | |
2183 | break; | |
2184 | default: | |
2185 | return -EINVAL; | |
2186 | } | |
2187 | return 0; | |
2188 | } | |
2189 | ||
2190 | /** | |
2191 | * ab8500_charger_usb_get_property() - get the usb properties | |
2192 | * @psy: pointer to the power_supply structure | |
2193 | * @psp: pointer to the power_supply_property structure | |
2194 | * @val: pointer to the power_supply_propval union | |
2195 | * | |
2196 | * This function gets called when an application tries to get the usb | |
2197 | * properties by reading the sysfs files. | |
2198 | * USB properties are online, present and voltage. | |
2199 | * online: usb charging is in progress or not | |
2200 | * present: presence of the usb | |
2201 | * voltage: vbus voltage | |
2202 | * Returns error code in case of failure else 0(on success) | |
2203 | */ | |
2204 | static int ab8500_charger_usb_get_property(struct power_supply *psy, | |
2205 | enum power_supply_property psp, | |
2206 | union power_supply_propval *val) | |
2207 | { | |
2208 | struct ab8500_charger *di; | |
2209 | ||
2210 | di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy)); | |
2211 | ||
2212 | switch (psp) { | |
2213 | case POWER_SUPPLY_PROP_HEALTH: | |
2214 | if (di->flags.usbchargernotok) | |
2215 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
2216 | else if (di->ac.wd_expired || di->usb.wd_expired) | |
2217 | val->intval = POWER_SUPPLY_HEALTH_DEAD; | |
2218 | else if (di->flags.usb_thermal_prot) | |
2219 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
2220 | else if (di->flags.vbus_ovv) | |
2221 | val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
2222 | else | |
2223 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
2224 | break; | |
2225 | case POWER_SUPPLY_PROP_ONLINE: | |
2226 | val->intval = di->usb.charger_online; | |
2227 | break; | |
2228 | case POWER_SUPPLY_PROP_PRESENT: | |
2229 | val->intval = di->usb.charger_connected; | |
2230 | break; | |
2231 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
2232 | di->usb.charger_voltage = ab8500_charger_get_vbus_voltage(di); | |
2233 | val->intval = di->usb.charger_voltage * 1000; | |
2234 | break; | |
2235 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
2236 | /* | |
2237 | * This property is used to indicate when CV mode is entered | |
2238 | * for the USB charger | |
2239 | */ | |
2240 | di->usb.cv_active = ab8500_charger_usb_cv(di); | |
2241 | val->intval = di->usb.cv_active; | |
2242 | break; | |
2243 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
2244 | val->intval = ab8500_charger_get_usb_current(di) * 1000; | |
2245 | break; | |
2246 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
2247 | /* | |
2248 | * This property is used to indicate when VBUS has collapsed | |
2249 | * due to too high output current from the USB charger | |
2250 | */ | |
2251 | if (di->flags.vbus_collapse) | |
2252 | val->intval = 1; | |
2253 | else | |
2254 | val->intval = 0; | |
2255 | break; | |
2256 | default: | |
2257 | return -EINVAL; | |
2258 | } | |
2259 | return 0; | |
2260 | } | |
2261 | ||
2262 | /** | |
2263 | * ab8500_charger_init_hw_registers() - Set up charger related registers | |
2264 | * @di: pointer to the ab8500_charger structure | |
2265 | * | |
2266 | * Set up charger OVV, watchdog and maximum voltage registers as well as | |
2267 | * charging of the backup battery | |
2268 | */ | |
2269 | static int ab8500_charger_init_hw_registers(struct ab8500_charger *di) | |
2270 | { | |
2271 | int ret = 0; | |
2272 | ||
2273 | /* Setup maximum charger current and voltage for ABB cut2.0 */ | |
2274 | if (!is_ab8500_1p1_or_earlier(di->parent)) { | |
2275 | ret = abx500_set_register_interruptible(di->dev, | |
2276 | AB8500_CHARGER, | |
2277 | AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6); | |
2278 | if (ret) { | |
2279 | dev_err(di->dev, | |
2280 | "failed to set CH_VOLT_LVL_MAX_REG\n"); | |
2281 | goto out; | |
2282 | } | |
2283 | ||
2284 | ret = abx500_set_register_interruptible(di->dev, | |
2285 | AB8500_CHARGER, | |
2286 | AB8500_CH_OPT_CRNTLVL_MAX_REG, CH_OP_CUR_LVL_1P6); | |
2287 | if (ret) { | |
2288 | dev_err(di->dev, | |
2289 | "failed to set CH_OPT_CRNTLVL_MAX_REG\n"); | |
2290 | goto out; | |
2291 | } | |
2292 | } | |
2293 | ||
2294 | /* VBUS OVV set to 6.3V and enable automatic current limitiation */ | |
2295 | ret = abx500_set_register_interruptible(di->dev, | |
2296 | AB8500_CHARGER, | |
2297 | AB8500_USBCH_CTRL2_REG, | |
2298 | VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA); | |
2299 | if (ret) { | |
2300 | dev_err(di->dev, "failed to set VBUS OVV\n"); | |
2301 | goto out; | |
2302 | } | |
2303 | ||
2304 | /* Enable main watchdog in OTP */ | |
2305 | ret = abx500_set_register_interruptible(di->dev, | |
2306 | AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD); | |
2307 | if (ret) { | |
2308 | dev_err(di->dev, "failed to enable main WD in OTP\n"); | |
2309 | goto out; | |
2310 | } | |
2311 | ||
2312 | /* Enable main watchdog */ | |
2313 | ret = abx500_set_register_interruptible(di->dev, | |
2314 | AB8500_SYS_CTRL2_BLOCK, | |
2315 | AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA); | |
2316 | if (ret) { | |
2317 | dev_err(di->dev, "faile to enable main watchdog\n"); | |
2318 | goto out; | |
2319 | } | |
2320 | ||
2321 | /* | |
2322 | * Due to internal synchronisation, Enable and Kick watchdog bits | |
2323 | * cannot be enabled in a single write. | |
2324 | * A minimum delay of 2*32 kHz period (62.5µs) must be inserted | |
2325 | * between writing Enable then Kick bits. | |
2326 | */ | |
2327 | udelay(63); | |
2328 | ||
2329 | /* Kick main watchdog */ | |
2330 | ret = abx500_set_register_interruptible(di->dev, | |
2331 | AB8500_SYS_CTRL2_BLOCK, | |
2332 | AB8500_MAIN_WDOG_CTRL_REG, | |
2333 | (MAIN_WDOG_ENA | MAIN_WDOG_KICK)); | |
2334 | if (ret) { | |
2335 | dev_err(di->dev, "failed to kick main watchdog\n"); | |
2336 | goto out; | |
2337 | } | |
2338 | ||
2339 | /* Disable main watchdog */ | |
2340 | ret = abx500_set_register_interruptible(di->dev, | |
2341 | AB8500_SYS_CTRL2_BLOCK, | |
2342 | AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS); | |
2343 | if (ret) { | |
2344 | dev_err(di->dev, "failed to disable main watchdog\n"); | |
2345 | goto out; | |
2346 | } | |
2347 | ||
2348 | /* Set watchdog timeout */ | |
2349 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
2350 | AB8500_CH_WD_TIMER_REG, WD_TIMER); | |
2351 | if (ret) { | |
2352 | dev_err(di->dev, "failed to set charger watchdog timeout\n"); | |
2353 | goto out; | |
2354 | } | |
2355 | ||
2356 | /* Backup battery voltage and current */ | |
2357 | ret = abx500_set_register_interruptible(di->dev, | |
2358 | AB8500_RTC, | |
2359 | AB8500_RTC_BACKUP_CHG_REG, | |
2360 | di->bat->bkup_bat_v | | |
2361 | di->bat->bkup_bat_i); | |
2362 | if (ret) { | |
2363 | dev_err(di->dev, "failed to setup backup battery charging\n"); | |
2364 | goto out; | |
2365 | } | |
2366 | ||
2367 | /* Enable backup battery charging */ | |
2368 | abx500_mask_and_set_register_interruptible(di->dev, | |
2369 | AB8500_RTC, AB8500_RTC_CTRL_REG, | |
2370 | RTC_BUP_CH_ENA, RTC_BUP_CH_ENA); | |
2371 | if (ret < 0) | |
2372 | dev_err(di->dev, "%s mask and set failed\n", __func__); | |
2373 | ||
2374 | out: | |
2375 | return ret; | |
2376 | } | |
2377 | ||
2378 | /* | |
2379 | * ab8500 charger driver interrupts and their respective isr | |
2380 | */ | |
2381 | static struct ab8500_charger_interrupts ab8500_charger_irq[] = { | |
2382 | {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler}, | |
2383 | {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler}, | |
2384 | {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler}, | |
2385 | {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler}, | |
2386 | {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler}, | |
2387 | {"VBUS_DET_F", ab8500_charger_vbusdetf_handler}, | |
2388 | {"VBUS_DET_R", ab8500_charger_vbusdetr_handler}, | |
2389 | {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler}, | |
2390 | {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler}, | |
2391 | {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler}, | |
2392 | {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler}, | |
2393 | {"VBUS_OVV", ab8500_charger_vbusovv_handler}, | |
2394 | {"CH_WD_EXP", ab8500_charger_chwdexp_handler}, | |
2395 | }; | |
2396 | ||
2397 | static int ab8500_charger_usb_notifier_call(struct notifier_block *nb, | |
2398 | unsigned long event, void *power) | |
2399 | { | |
2400 | struct ab8500_charger *di = | |
2401 | container_of(nb, struct ab8500_charger, nb); | |
2402 | enum ab8500_usb_state bm_usb_state; | |
2403 | unsigned mA = *((unsigned *)power); | |
2404 | ||
2405 | if (event != USB_EVENT_VBUS) { | |
2406 | dev_dbg(di->dev, "not a standard host, returning\n"); | |
2407 | return NOTIFY_DONE; | |
2408 | } | |
2409 | ||
2410 | /* TODO: State is fabricate here. See if charger really needs USB | |
2411 | * state or if mA is enough | |
2412 | */ | |
2413 | if ((di->usb_state.usb_current == 2) && (mA > 2)) | |
2414 | bm_usb_state = AB8500_BM_USB_STATE_RESUME; | |
2415 | else if (mA == 0) | |
2416 | bm_usb_state = AB8500_BM_USB_STATE_RESET_HS; | |
2417 | else if (mA == 2) | |
2418 | bm_usb_state = AB8500_BM_USB_STATE_SUSPEND; | |
2419 | else if (mA >= 8) /* 8, 100, 500 */ | |
2420 | bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED; | |
2421 | else /* Should never occur */ | |
2422 | bm_usb_state = AB8500_BM_USB_STATE_RESET_FS; | |
2423 | ||
2424 | dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n", | |
2425 | __func__, bm_usb_state, mA); | |
2426 | ||
2427 | spin_lock(&di->usb_state.usb_lock); | |
2428 | di->usb_state.usb_changed = true; | |
2429 | spin_unlock(&di->usb_state.usb_lock); | |
2430 | ||
2431 | di->usb_state.state = bm_usb_state; | |
2432 | di->usb_state.usb_current = mA; | |
2433 | ||
2434 | queue_work(di->charger_wq, &di->usb_state_changed_work); | |
2435 | ||
2436 | return NOTIFY_OK; | |
2437 | } | |
2438 | ||
2439 | #if defined(CONFIG_PM) | |
2440 | static int ab8500_charger_resume(struct platform_device *pdev) | |
2441 | { | |
2442 | int ret; | |
2443 | struct ab8500_charger *di = platform_get_drvdata(pdev); | |
2444 | ||
2445 | /* | |
2446 | * For ABB revision 1.0 and 1.1 there is a bug in the watchdog | |
2447 | * logic. That means we have to continously kick the charger | |
2448 | * watchdog even when no charger is connected. This is only | |
2449 | * valid once the AC charger has been enabled. This is | |
2450 | * a bug that is not handled by the algorithm and the | |
2451 | * watchdog have to be kicked by the charger driver | |
2452 | * when the AC charger is disabled | |
2453 | */ | |
2454 | if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) { | |
2455 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
2456 | AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); | |
2457 | if (ret) | |
2458 | dev_err(di->dev, "Failed to kick WD!\n"); | |
2459 | ||
2460 | /* If not already pending start a new timer */ | |
2461 | if (!delayed_work_pending( | |
2462 | &di->kick_wd_work)) { | |
2463 | queue_delayed_work(di->charger_wq, &di->kick_wd_work, | |
2464 | round_jiffies(WD_KICK_INTERVAL)); | |
2465 | } | |
2466 | } | |
2467 | ||
2468 | /* If we still have a HW failure, schedule a new check */ | |
2469 | if (di->flags.mainextchnotok || di->flags.vbus_ovv) { | |
2470 | queue_delayed_work(di->charger_wq, | |
2471 | &di->check_hw_failure_work, 0); | |
2472 | } | |
2473 | ||
2474 | return 0; | |
2475 | } | |
2476 | ||
2477 | static int ab8500_charger_suspend(struct platform_device *pdev, | |
2478 | pm_message_t state) | |
2479 | { | |
2480 | struct ab8500_charger *di = platform_get_drvdata(pdev); | |
2481 | ||
2482 | /* Cancel any pending HW failure check */ | |
2483 | if (delayed_work_pending(&di->check_hw_failure_work)) | |
2484 | cancel_delayed_work(&di->check_hw_failure_work); | |
2485 | ||
2486 | return 0; | |
2487 | } | |
2488 | #else | |
2489 | #define ab8500_charger_suspend NULL | |
2490 | #define ab8500_charger_resume NULL | |
2491 | #endif | |
2492 | ||
2493 | static int __devexit ab8500_charger_remove(struct platform_device *pdev) | |
2494 | { | |
2495 | struct ab8500_charger *di = platform_get_drvdata(pdev); | |
2496 | int i, irq, ret; | |
2497 | ||
2498 | /* Disable AC charging */ | |
2499 | ab8500_charger_ac_en(&di->ac_chg, false, 0, 0); | |
2500 | ||
2501 | /* Disable USB charging */ | |
2502 | ab8500_charger_usb_en(&di->usb_chg, false, 0, 0); | |
2503 | ||
2504 | /* Disable interrupts */ | |
2505 | for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) { | |
2506 | irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); | |
2507 | free_irq(irq, di); | |
2508 | } | |
2509 | ||
2510 | /* disable the regulator */ | |
2511 | regulator_put(di->regu); | |
2512 | ||
2513 | /* Backup battery voltage and current disable */ | |
2514 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
2515 | AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0); | |
2516 | if (ret < 0) | |
2517 | dev_err(di->dev, "%s mask and set failed\n", __func__); | |
2518 | ||
efd71c89 | 2519 | usb_unregister_notifier(di->usb_phy, &di->nb); |
721002ec | 2520 | usb_put_phy(di->usb_phy); |
84edbeea AM |
2521 | |
2522 | /* Delete the work queue */ | |
2523 | destroy_workqueue(di->charger_wq); | |
2524 | ||
2525 | flush_scheduled_work(); | |
2526 | power_supply_unregister(&di->usb_chg.psy); | |
2527 | power_supply_unregister(&di->ac_chg.psy); | |
2528 | platform_set_drvdata(pdev, NULL); | |
2529 | kfree(di); | |
2530 | ||
2531 | return 0; | |
2532 | } | |
2533 | ||
2534 | static int __devinit ab8500_charger_probe(struct platform_device *pdev) | |
2535 | { | |
2536 | int irq, i, charger_status, ret = 0; | |
2aac3de1 LJ |
2537 | struct abx500_bm_plat_data *plat_data = pdev->dev.platform_data; |
2538 | struct ab8500_charger *di; | |
84edbeea | 2539 | |
2aac3de1 LJ |
2540 | if (!plat_data) { |
2541 | dev_err(&pdev->dev, "No platform data\n"); | |
2542 | return -EINVAL; | |
2543 | } | |
2544 | ||
2545 | di = kzalloc(sizeof(*di), GFP_KERNEL); | |
84edbeea AM |
2546 | if (!di) |
2547 | return -ENOMEM; | |
2548 | ||
2549 | /* get parent data */ | |
2550 | di->dev = &pdev->dev; | |
2551 | di->parent = dev_get_drvdata(pdev->dev.parent); | |
2552 | di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0"); | |
2553 | ||
2554 | /* initialize lock */ | |
2555 | spin_lock_init(&di->usb_state.usb_lock); | |
2556 | ||
2557 | /* get charger specific platform data */ | |
2aac3de1 LJ |
2558 | di->pdata = plat_data->charger; |
2559 | if (!di->pdata) { | |
84edbeea AM |
2560 | dev_err(di->dev, "no charger platform data supplied\n"); |
2561 | ret = -EINVAL; | |
2562 | goto free_device_info; | |
2563 | } | |
2564 | ||
2565 | /* get battery specific platform data */ | |
2566 | di->bat = plat_data->battery; | |
2567 | if (!di->bat) { | |
2568 | dev_err(di->dev, "no battery platform data supplied\n"); | |
2569 | ret = -EINVAL; | |
2570 | goto free_device_info; | |
2571 | } | |
2572 | ||
2573 | di->autopower = false; | |
2574 | ||
2575 | /* AC supply */ | |
2576 | /* power_supply base class */ | |
2577 | di->ac_chg.psy.name = "ab8500_ac"; | |
2578 | di->ac_chg.psy.type = POWER_SUPPLY_TYPE_MAINS; | |
2579 | di->ac_chg.psy.properties = ab8500_charger_ac_props; | |
2580 | di->ac_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_ac_props); | |
2581 | di->ac_chg.psy.get_property = ab8500_charger_ac_get_property; | |
2582 | di->ac_chg.psy.supplied_to = di->pdata->supplied_to; | |
2583 | di->ac_chg.psy.num_supplicants = di->pdata->num_supplicants; | |
2584 | /* ux500_charger sub-class */ | |
2585 | di->ac_chg.ops.enable = &ab8500_charger_ac_en; | |
2586 | di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick; | |
2587 | di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current; | |
2588 | di->ac_chg.max_out_volt = ab8500_charger_voltage_map[ | |
2589 | ARRAY_SIZE(ab8500_charger_voltage_map) - 1]; | |
2590 | di->ac_chg.max_out_curr = ab8500_charger_current_map[ | |
2591 | ARRAY_SIZE(ab8500_charger_current_map) - 1]; | |
2592 | ||
2593 | /* USB supply */ | |
2594 | /* power_supply base class */ | |
2595 | di->usb_chg.psy.name = "ab8500_usb"; | |
2596 | di->usb_chg.psy.type = POWER_SUPPLY_TYPE_USB; | |
2597 | di->usb_chg.psy.properties = ab8500_charger_usb_props; | |
2598 | di->usb_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_usb_props); | |
2599 | di->usb_chg.psy.get_property = ab8500_charger_usb_get_property; | |
2600 | di->usb_chg.psy.supplied_to = di->pdata->supplied_to; | |
2601 | di->usb_chg.psy.num_supplicants = di->pdata->num_supplicants; | |
2602 | /* ux500_charger sub-class */ | |
2603 | di->usb_chg.ops.enable = &ab8500_charger_usb_en; | |
2604 | di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick; | |
2605 | di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current; | |
2606 | di->usb_chg.max_out_volt = ab8500_charger_voltage_map[ | |
2607 | ARRAY_SIZE(ab8500_charger_voltage_map) - 1]; | |
2608 | di->usb_chg.max_out_curr = ab8500_charger_current_map[ | |
2609 | ARRAY_SIZE(ab8500_charger_current_map) - 1]; | |
2610 | ||
2611 | ||
2612 | /* Create a work queue for the charger */ | |
2613 | di->charger_wq = | |
2614 | create_singlethread_workqueue("ab8500_charger_wq"); | |
2615 | if (di->charger_wq == NULL) { | |
2616 | dev_err(di->dev, "failed to create work queue\n"); | |
2617 | goto free_device_info; | |
2618 | } | |
2619 | ||
2620 | /* Init work for HW failure check */ | |
2621 | INIT_DELAYED_WORK_DEFERRABLE(&di->check_hw_failure_work, | |
2622 | ab8500_charger_check_hw_failure_work); | |
2623 | INIT_DELAYED_WORK_DEFERRABLE(&di->check_usbchgnotok_work, | |
2624 | ab8500_charger_check_usbchargernotok_work); | |
2625 | ||
2626 | /* | |
2627 | * For ABB revision 1.0 and 1.1 there is a bug in the watchdog | |
2628 | * logic. That means we have to continously kick the charger | |
2629 | * watchdog even when no charger is connected. This is only | |
2630 | * valid once the AC charger has been enabled. This is | |
2631 | * a bug that is not handled by the algorithm and the | |
2632 | * watchdog have to be kicked by the charger driver | |
2633 | * when the AC charger is disabled | |
2634 | */ | |
2635 | INIT_DELAYED_WORK_DEFERRABLE(&di->kick_wd_work, | |
2636 | ab8500_charger_kick_watchdog_work); | |
2637 | ||
2638 | INIT_DELAYED_WORK_DEFERRABLE(&di->check_vbat_work, | |
2639 | ab8500_charger_check_vbat_work); | |
2640 | ||
2641 | /* Init work for charger detection */ | |
2642 | INIT_WORK(&di->usb_link_status_work, | |
2643 | ab8500_charger_usb_link_status_work); | |
2644 | INIT_WORK(&di->ac_work, ab8500_charger_ac_work); | |
2645 | INIT_WORK(&di->detect_usb_type_work, | |
2646 | ab8500_charger_detect_usb_type_work); | |
2647 | ||
2648 | INIT_WORK(&di->usb_state_changed_work, | |
2649 | ab8500_charger_usb_state_changed_work); | |
2650 | ||
2651 | /* Init work for checking HW status */ | |
2652 | INIT_WORK(&di->check_main_thermal_prot_work, | |
2653 | ab8500_charger_check_main_thermal_prot_work); | |
2654 | INIT_WORK(&di->check_usb_thermal_prot_work, | |
2655 | ab8500_charger_check_usb_thermal_prot_work); | |
2656 | ||
2657 | /* | |
2658 | * VDD ADC supply needs to be enabled from this driver when there | |
2659 | * is a charger connected to avoid erroneous BTEMP_HIGH/LOW | |
2660 | * interrupts during charging | |
2661 | */ | |
2662 | di->regu = regulator_get(di->dev, "vddadc"); | |
2663 | if (IS_ERR(di->regu)) { | |
2664 | ret = PTR_ERR(di->regu); | |
2665 | dev_err(di->dev, "failed to get vddadc regulator\n"); | |
2666 | goto free_charger_wq; | |
2667 | } | |
2668 | ||
2669 | ||
2670 | /* Initialize OVV, and other registers */ | |
2671 | ret = ab8500_charger_init_hw_registers(di); | |
2672 | if (ret) { | |
2673 | dev_err(di->dev, "failed to initialize ABB registers\n"); | |
2674 | goto free_regulator; | |
2675 | } | |
2676 | ||
2677 | /* Register AC charger class */ | |
2678 | ret = power_supply_register(di->dev, &di->ac_chg.psy); | |
2679 | if (ret) { | |
2680 | dev_err(di->dev, "failed to register AC charger\n"); | |
2681 | goto free_regulator; | |
2682 | } | |
2683 | ||
2684 | /* Register USB charger class */ | |
2685 | ret = power_supply_register(di->dev, &di->usb_chg.psy); | |
2686 | if (ret) { | |
2687 | dev_err(di->dev, "failed to register USB charger\n"); | |
2688 | goto free_ac; | |
2689 | } | |
2690 | ||
662dca54 | 2691 | di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2); |
ded017ee | 2692 | if (IS_ERR_OR_NULL(di->usb_phy)) { |
efd71c89 | 2693 | dev_err(di->dev, "failed to get usb transceiver\n"); |
84edbeea AM |
2694 | ret = -EINVAL; |
2695 | goto free_usb; | |
2696 | } | |
2697 | di->nb.notifier_call = ab8500_charger_usb_notifier_call; | |
efd71c89 | 2698 | ret = usb_register_notifier(di->usb_phy, &di->nb); |
84edbeea | 2699 | if (ret) { |
efd71c89 AV |
2700 | dev_err(di->dev, "failed to register usb notifier\n"); |
2701 | goto put_usb_phy; | |
84edbeea AM |
2702 | } |
2703 | ||
2704 | /* Identify the connected charger types during startup */ | |
2705 | charger_status = ab8500_charger_detect_chargers(di); | |
2706 | if (charger_status & AC_PW_CONN) { | |
2707 | di->ac.charger_connected = 1; | |
2708 | di->ac_conn = true; | |
2709 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
2710 | sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present"); | |
2711 | } | |
2712 | ||
2713 | if (charger_status & USB_PW_CONN) { | |
2714 | dev_dbg(di->dev, "VBUS Detect during startup\n"); | |
2715 | di->vbus_detected = true; | |
2716 | di->vbus_detected_start = true; | |
2717 | queue_work(di->charger_wq, | |
2718 | &di->detect_usb_type_work); | |
2719 | } | |
2720 | ||
2721 | /* Register interrupts */ | |
2722 | for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) { | |
2723 | irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); | |
2724 | ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr, | |
2725 | IRQF_SHARED | IRQF_NO_SUSPEND, | |
2726 | ab8500_charger_irq[i].name, di); | |
2727 | ||
2728 | if (ret != 0) { | |
2729 | dev_err(di->dev, "failed to request %s IRQ %d: %d\n" | |
2730 | , ab8500_charger_irq[i].name, irq, ret); | |
2731 | goto free_irq; | |
2732 | } | |
2733 | dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", | |
2734 | ab8500_charger_irq[i].name, irq, ret); | |
2735 | } | |
2736 | ||
2737 | platform_set_drvdata(pdev, di); | |
2738 | ||
2739 | return ret; | |
2740 | ||
2741 | free_irq: | |
efd71c89 | 2742 | usb_unregister_notifier(di->usb_phy, &di->nb); |
84edbeea AM |
2743 | |
2744 | /* We also have to free all successfully registered irqs */ | |
2745 | for (i = i - 1; i >= 0; i--) { | |
2746 | irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); | |
2747 | free_irq(irq, di); | |
2748 | } | |
efd71c89 | 2749 | put_usb_phy: |
721002ec | 2750 | usb_put_phy(di->usb_phy); |
84edbeea AM |
2751 | free_usb: |
2752 | power_supply_unregister(&di->usb_chg.psy); | |
2753 | free_ac: | |
2754 | power_supply_unregister(&di->ac_chg.psy); | |
2755 | free_regulator: | |
2756 | regulator_put(di->regu); | |
2757 | free_charger_wq: | |
2758 | destroy_workqueue(di->charger_wq); | |
2759 | free_device_info: | |
2760 | kfree(di); | |
2761 | ||
2762 | return ret; | |
2763 | } | |
2764 | ||
2765 | static struct platform_driver ab8500_charger_driver = { | |
2766 | .probe = ab8500_charger_probe, | |
2767 | .remove = __devexit_p(ab8500_charger_remove), | |
2768 | .suspend = ab8500_charger_suspend, | |
2769 | .resume = ab8500_charger_resume, | |
2770 | .driver = { | |
2771 | .name = "ab8500-charger", | |
2772 | .owner = THIS_MODULE, | |
2773 | }, | |
2774 | }; | |
2775 | ||
2776 | static int __init ab8500_charger_init(void) | |
2777 | { | |
2778 | return platform_driver_register(&ab8500_charger_driver); | |
2779 | } | |
2780 | ||
2781 | static void __exit ab8500_charger_exit(void) | |
2782 | { | |
2783 | platform_driver_unregister(&ab8500_charger_driver); | |
2784 | } | |
2785 | ||
2786 | subsys_initcall_sync(ab8500_charger_init); | |
2787 | module_exit(ab8500_charger_exit); | |
2788 | ||
2789 | MODULE_LICENSE("GPL v2"); | |
2790 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy"); | |
2791 | MODULE_ALIAS("platform:ab8500-charger"); | |
2792 | MODULE_DESCRIPTION("AB8500 charger management driver"); |