?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
gro: Allow tunnel stacking in the case of FOU/GUE
[linux/fpc-iii.git] / drivers / power / ab8500_charger.c
blobe388171f4e587e8931ec44ca32e03b08cd916a0b
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/notifier.h>
19 #include <linux/slab.h>
20 #include <linux/platform_device.h>
21 #include <linux/power_supply.h>
22 #include <linux/completion.h>
23 #include <linux/regulator/consumer.h>
24 #include <linux/err.h>
25 #include <linux/workqueue.h>
26 #include <linux/kobject.h>
27 #include <linux/of.h>
28 #include <linux/mfd/core.h>
29 #include <linux/mfd/abx500/ab8500.h>
30 #include <linux/mfd/abx500.h>
31 #include <linux/mfd/abx500/ab8500-bm.h>
32 #include <linux/mfd/abx500/ab8500-gpadc.h>
33 #include <linux/mfd/abx500/ux500_chargalg.h>
34 #include <linux/usb/otg.h>
35 #include <linux/mutex.h>
36
37 /* Charger constants */
38 #define NO_PW_CONN 0
39 #define AC_PW_CONN 1
40 #define USB_PW_CONN 2
41
42 #define MAIN_WDOG_ENA 0x01
43 #define MAIN_WDOG_KICK 0x02
44 #define MAIN_WDOG_DIS 0x00
45 #define CHARG_WD_KICK 0x01
46 #define MAIN_CH_ENA 0x01
47 #define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02
48 #define USB_CH_ENA 0x01
49 #define USB_CHG_NO_OVERSHOOT_ENA_N 0x02
50 #define MAIN_CH_DET 0x01
51 #define MAIN_CH_CV_ON 0x04
52 #define USB_CH_CV_ON 0x08
53 #define VBUS_DET_DBNC100 0x02
54 #define VBUS_DET_DBNC1 0x01
55 #define OTP_ENABLE_WD 0x01
56 #define DROP_COUNT_RESET 0x01
57 #define USB_CH_DET 0x01
58
59 #define MAIN_CH_INPUT_CURR_SHIFT 4
60 #define VBUS_IN_CURR_LIM_SHIFT 4
61 #define AB8540_VBUS_IN_CURR_LIM_SHIFT 2
62 #define AUTO_VBUS_IN_CURR_LIM_SHIFT 4
63 #define AB8540_AUTO_VBUS_IN_CURR_MASK 0x3F
64 #define VBUS_IN_CURR_LIM_RETRY_SET_TIME 30 /* seconds */
65
66 #define LED_INDICATOR_PWM_ENA 0x01
67 #define LED_INDICATOR_PWM_DIS 0x00
68 #define LED_IND_CUR_5MA 0x04
69 #define LED_INDICATOR_PWM_DUTY_252_256 0xBF
70
71 /* HW failure constants */
72 #define MAIN_CH_TH_PROT 0x02
73 #define VBUS_CH_NOK 0x08
74 #define USB_CH_TH_PROT 0x02
75 #define VBUS_OVV_TH 0x01
76 #define MAIN_CH_NOK 0x01
77 #define VBUS_DET 0x80
78
79 #define MAIN_CH_STATUS2_MAINCHGDROP 0x80
80 #define MAIN_CH_STATUS2_MAINCHARGERDETDBNC 0x40
81 #define USB_CH_VBUSDROP 0x40
82 #define USB_CH_VBUSDETDBNC 0x01
83
84 /* UsbLineStatus register bit masks */
85 #define AB8500_USB_LINK_STATUS 0x78
86 #define AB8505_USB_LINK_STATUS 0xF8
87 #define AB8500_STD_HOST_SUSP 0x18
88 #define USB_LINK_STATUS_SHIFT 3
89
90 /* Watchdog timeout constant */
91 #define WD_TIMER 0x30 /* 4min */
92 #define WD_KICK_INTERVAL (60 * HZ)
93
94 /* Lowest charger voltage is 3.39V -> 0x4E */
95 #define LOW_VOLT_REG 0x4E
96
97 /* Step up/down delay in us */
98 #define STEP_UDELAY 1000
99
100 #define CHARGER_STATUS_POLL 10 /* in ms */
101
102 #define CHG_WD_INTERVAL (60 * HZ)
103
104 #define AB8500_SW_CONTROL_FALLBACK 0x03
105 /* Wait for enumeration before charing in us */
106 #define WAIT_ACA_RID_ENUMERATION (5 * 1000)
107 /*External charger control*/
108 #define AB8500_SYS_CHARGER_CONTROL_REG 0x52
109 #define EXTERNAL_CHARGER_DISABLE_REG_VAL 0x03
110 #define EXTERNAL_CHARGER_ENABLE_REG_VAL 0x07
111
112 /* UsbLineStatus register - usb types */
113 enum ab8500_charger_link_status {
114 USB_STAT_NOT_CONFIGURED,
115 USB_STAT_STD_HOST_NC,
116 USB_STAT_STD_HOST_C_NS,
117 USB_STAT_STD_HOST_C_S,
118 USB_STAT_HOST_CHG_NM,
119 USB_STAT_HOST_CHG_HS,
120 USB_STAT_HOST_CHG_HS_CHIRP,
121 USB_STAT_DEDICATED_CHG,
122 USB_STAT_ACA_RID_A,
123 USB_STAT_ACA_RID_B,
124 USB_STAT_ACA_RID_C_NM,
125 USB_STAT_ACA_RID_C_HS,
126 USB_STAT_ACA_RID_C_HS_CHIRP,
127 USB_STAT_HM_IDGND,
128 USB_STAT_RESERVED,
129 USB_STAT_NOT_VALID_LINK,
130 USB_STAT_PHY_EN,
131 USB_STAT_SUP_NO_IDGND_VBUS,
132 USB_STAT_SUP_IDGND_VBUS,
133 USB_STAT_CHARGER_LINE_1,
134 USB_STAT_CARKIT_1,
135 USB_STAT_CARKIT_2,
136 USB_STAT_ACA_DOCK_CHARGER,
137 };
138
139 enum ab8500_usb_state {
140 AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */
141 AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */
142 AB8500_BM_USB_STATE_CONFIGURED,
143 AB8500_BM_USB_STATE_SUSPEND,
144 AB8500_BM_USB_STATE_RESUME,
145 AB8500_BM_USB_STATE_MAX,
146 };
147
148 /* VBUS input current limits supported in AB8500 in mA */
149 #define USB_CH_IP_CUR_LVL_0P05 50
150 #define USB_CH_IP_CUR_LVL_0P09 98
151 #define USB_CH_IP_CUR_LVL_0P19 193
152 #define USB_CH_IP_CUR_LVL_0P29 290
153 #define USB_CH_IP_CUR_LVL_0P38 380
154 #define USB_CH_IP_CUR_LVL_0P45 450
155 #define USB_CH_IP_CUR_LVL_0P5 500
156 #define USB_CH_IP_CUR_LVL_0P6 600
157 #define USB_CH_IP_CUR_LVL_0P7 700
158 #define USB_CH_IP_CUR_LVL_0P8 800
159 #define USB_CH_IP_CUR_LVL_0P9 900
160 #define USB_CH_IP_CUR_LVL_1P0 1000
161 #define USB_CH_IP_CUR_LVL_1P1 1100
162 #define USB_CH_IP_CUR_LVL_1P3 1300
163 #define USB_CH_IP_CUR_LVL_1P4 1400
164 #define USB_CH_IP_CUR_LVL_1P5 1500
165
166 #define VBAT_TRESH_IP_CUR_RED 3800
167
168 #define to_ab8500_charger_usb_device_info(x) container_of((x), \
169 struct ab8500_charger, usb_chg)
170 #define to_ab8500_charger_ac_device_info(x) container_of((x), \
171 struct ab8500_charger, ac_chg)
172
173 /**
174 * struct ab8500_charger_interrupts - ab8500 interupts
175 * @name: name of the interrupt
176 * @isr function pointer to the isr
177 */
178 struct ab8500_charger_interrupts {
179 char *name;
180 irqreturn_t (*isr)(int irq, void *data);
181 };
182
183 struct ab8500_charger_info {
184 int charger_connected;
185 int charger_online;
186 int charger_voltage;
187 int cv_active;
188 bool wd_expired;
189 int charger_current;
190 };
191
192 struct ab8500_charger_event_flags {
193 bool mainextchnotok;
194 bool main_thermal_prot;
195 bool usb_thermal_prot;
196 bool vbus_ovv;
197 bool usbchargernotok;
198 bool chgwdexp;
199 bool vbus_collapse;
200 bool vbus_drop_end;
201 };
202
203 struct ab8500_charger_usb_state {
204 int usb_current;
205 int usb_current_tmp;
206 enum ab8500_usb_state state;
207 enum ab8500_usb_state state_tmp;
208 spinlock_t usb_lock;
209 };
210
211 struct ab8500_charger_max_usb_in_curr {
212 int usb_type_max;
213 int set_max;
214 int calculated_max;
215 };
216
217 /**
218 * struct ab8500_charger - ab8500 Charger device information
219 * @dev: Pointer to the structure device
220 * @vbus_detected: VBUS detected
221 * @vbus_detected_start:
222 * VBUS detected during startup
223 * @ac_conn: This will be true when the AC charger has been plugged
224 * @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC
225 * charger is enabled
226 * @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB
227 * charger is enabled
228 * @vbat Battery voltage
229 * @old_vbat Previously measured battery voltage
230 * @usb_device_is_unrecognised USB device is unrecognised by the hardware
231 * @autopower Indicate if we should have automatic pwron after pwrloss
232 * @autopower_cfg platform specific power config support for "pwron after pwrloss"
233 * @invalid_charger_detect_state State when forcing AB to use invalid charger
234 * @is_aca_rid: Incicate if accessory is ACA type
235 * @current_stepping_sessions:
236 * Counter for current stepping sessions
237 * @parent: Pointer to the struct ab8500
238 * @gpadc: Pointer to the struct gpadc
239 * @bm: Platform specific battery management information
240 * @flags: Structure for information about events triggered
241 * @usb_state: Structure for usb stack information
242 * @max_usb_in_curr: Max USB charger input current
243 * @ac_chg: AC charger power supply
244 * @usb_chg: USB charger power supply
245 * @ac: Structure that holds the AC charger properties
246 * @usb: Structure that holds the USB charger properties
247 * @regu: Pointer to the struct regulator
248 * @charger_wq: Work queue for the IRQs and checking HW state
249 * @usb_ipt_crnt_lock: Lock to protect VBUS input current setting from mutuals
250 * @pm_lock: Lock to prevent system to suspend
251 * @check_vbat_work Work for checking vbat threshold to adjust vbus current
252 * @check_hw_failure_work: Work for checking HW state
253 * @check_usbchgnotok_work: Work for checking USB charger not ok status
254 * @kick_wd_work: Work for kicking the charger watchdog in case
255 * of ABB rev 1.* due to the watchog logic bug
256 * @ac_charger_attached_work: Work for checking if AC charger is still
257 * connected
258 * @usb_charger_attached_work: Work for checking if USB charger is still
259 * connected
260 * @ac_work: Work for checking AC charger connection
261 * @detect_usb_type_work: Work for detecting the USB type connected
262 * @usb_link_status_work: Work for checking the new USB link status
263 * @usb_state_changed_work: Work for checking USB state
264 * @attach_work: Work for detecting USB type
265 * @vbus_drop_end_work: Work for detecting VBUS drop end
266 * @check_main_thermal_prot_work:
267 * Work for checking Main thermal status
268 * @check_usb_thermal_prot_work:
269 * Work for checking USB thermal status
270 * @charger_attached_mutex: For controlling the wakelock
271 */
272 struct ab8500_charger {
273 struct device *dev;
274 bool vbus_detected;
275 bool vbus_detected_start;
276 bool ac_conn;
277 bool vddadc_en_ac;
278 bool vddadc_en_usb;
279 int vbat;
280 int old_vbat;
281 bool usb_device_is_unrecognised;
282 bool autopower;
283 bool autopower_cfg;
284 int invalid_charger_detect_state;
285 int is_aca_rid;
286 atomic_t current_stepping_sessions;
287 struct ab8500 *parent;
288 struct ab8500_gpadc *gpadc;
289 struct abx500_bm_data *bm;
290 struct ab8500_charger_event_flags flags;
291 struct ab8500_charger_usb_state usb_state;
292 struct ab8500_charger_max_usb_in_curr max_usb_in_curr;
293 struct ux500_charger ac_chg;
294 struct ux500_charger usb_chg;
295 struct ab8500_charger_info ac;
296 struct ab8500_charger_info usb;
297 struct regulator *regu;
298 struct workqueue_struct *charger_wq;
299 struct mutex usb_ipt_crnt_lock;
300 struct delayed_work check_vbat_work;
301 struct delayed_work check_hw_failure_work;
302 struct delayed_work check_usbchgnotok_work;
303 struct delayed_work kick_wd_work;
304 struct delayed_work usb_state_changed_work;
305 struct delayed_work attach_work;
306 struct delayed_work ac_charger_attached_work;
307 struct delayed_work usb_charger_attached_work;
308 struct delayed_work vbus_drop_end_work;
309 struct work_struct ac_work;
310 struct work_struct detect_usb_type_work;
311 struct work_struct usb_link_status_work;
312 struct work_struct check_main_thermal_prot_work;
313 struct work_struct check_usb_thermal_prot_work;
314 struct usb_phy *usb_phy;
315 struct notifier_block nb;
316 struct mutex charger_attached_mutex;
317 };
318
319 /* AC properties */
320 static enum power_supply_property ab8500_charger_ac_props[] = {
321 POWER_SUPPLY_PROP_HEALTH,
322 POWER_SUPPLY_PROP_PRESENT,
323 POWER_SUPPLY_PROP_ONLINE,
324 POWER_SUPPLY_PROP_VOLTAGE_NOW,
325 POWER_SUPPLY_PROP_VOLTAGE_AVG,
326 POWER_SUPPLY_PROP_CURRENT_NOW,
327 };
328
329 /* USB properties */
330 static enum power_supply_property ab8500_charger_usb_props[] = {
331 POWER_SUPPLY_PROP_HEALTH,
332 POWER_SUPPLY_PROP_CURRENT_AVG,
333 POWER_SUPPLY_PROP_PRESENT,
334 POWER_SUPPLY_PROP_ONLINE,
335 POWER_SUPPLY_PROP_VOLTAGE_NOW,
336 POWER_SUPPLY_PROP_VOLTAGE_AVG,
337 POWER_SUPPLY_PROP_CURRENT_NOW,
338 };
339
340 /*
341 * Function for enabling and disabling sw fallback mode
342 * should always be disabled when no charger is connected.
343 */
344 static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di,
345 bool fallback)
346 {
347 u8 val;
348 u8 reg;
349 u8 bank;
350 u8 bit;
351 int ret;
352
353 dev_dbg(di->dev, "SW Fallback: %d\n", fallback);
354
355 if (is_ab8500(di->parent)) {
356 bank = 0x15;
357 reg = 0x0;
358 bit = 3;
359 } else {
360 bank = AB8500_SYS_CTRL1_BLOCK;
361 reg = AB8500_SW_CONTROL_FALLBACK;
362 bit = 0;
363 }
364
365 /* read the register containing fallback bit */
366 ret = abx500_get_register_interruptible(di->dev, bank, reg, &val);
367 if (ret < 0) {
368 dev_err(di->dev, "%d read failed\n", __LINE__);
369 return;
370 }
371
372 if (is_ab8500(di->parent)) {
373 /* enable the OPT emulation registers */
374 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
375 if (ret) {
376 dev_err(di->dev, "%d write failed\n", __LINE__);
377 goto disable_otp;
378 }
379 }
380
381 if (fallback)
382 val |= (1 << bit);
383 else
384 val &= ~(1 << bit);
385
386 /* write back the changed fallback bit value to register */
387 ret = abx500_set_register_interruptible(di->dev, bank, reg, val);
388 if (ret) {
389 dev_err(di->dev, "%d write failed\n", __LINE__);
390 }
391
392 disable_otp:
393 if (is_ab8500(di->parent)) {
394 /* disable the set OTP registers again */
395 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
396 if (ret) {
397 dev_err(di->dev, "%d write failed\n", __LINE__);
398 }
399 }
400 }
401
402 /**
403 * ab8500_power_supply_changed - a wrapper with local extentions for
404 * power_supply_changed
405 * @di: pointer to the ab8500_charger structure
406 * @psy: pointer to power_supply_that have changed.
407 *
408 */
409 static void ab8500_power_supply_changed(struct ab8500_charger *di,
410 struct power_supply *psy)
411 {
412 if (di->autopower_cfg) {
413 if (!di->usb.charger_connected &&
414 !di->ac.charger_connected &&
415 di->autopower) {
416 di->autopower = false;
417 ab8500_enable_disable_sw_fallback(di, false);
418 } else if (!di->autopower &&
419 (di->ac.charger_connected ||
420 di->usb.charger_connected)) {
421 di->autopower = true;
422 ab8500_enable_disable_sw_fallback(di, true);
423 }
424 }
425 power_supply_changed(psy);
426 }
427
428 static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
429 bool connected)
430 {
431 if (connected != di->usb.charger_connected) {
432 dev_dbg(di->dev, "USB connected:%i\n", connected);
433 di->usb.charger_connected = connected;
434
435 if (!connected)
436 di->flags.vbus_drop_end = false;
437
438 sysfs_notify(&di->usb_chg.psy->dev.kobj, NULL, "present");
439
440 if (connected) {
441 mutex_lock(&di->charger_attached_mutex);
442 mutex_unlock(&di->charger_attached_mutex);
443
444 if (is_ab8500(di->parent))
445 queue_delayed_work(di->charger_wq,
446 &di->usb_charger_attached_work,
447 HZ);
448 } else {
449 cancel_delayed_work_sync(&di->usb_charger_attached_work);
450 mutex_lock(&di->charger_attached_mutex);
451 mutex_unlock(&di->charger_attached_mutex);
452 }
453 }
454 }
455
456 /**
457 * ab8500_charger_get_ac_voltage() - get ac charger voltage
458 * @di: pointer to the ab8500_charger structure
459 *
460 * Returns ac charger voltage (on success)
461 */
462 static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
463 {
464 int vch;
465
466 /* Only measure voltage if the charger is connected */
467 if (di->ac.charger_connected) {
468 vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V);
469 if (vch < 0)
470 dev_err(di->dev, "%s gpadc conv failed,\n", __func__);
471 } else {
472 vch = 0;
473 }
474 return vch;
475 }
476
477 /**
478 * ab8500_charger_ac_cv() - check if the main charger is in CV mode
479 * @di: pointer to the ab8500_charger structure
480 *
481 * Returns ac charger CV mode (on success) else error code
482 */
483 static int ab8500_charger_ac_cv(struct ab8500_charger *di)
484 {
485 u8 val;
486 int ret = 0;
487
488 /* Only check CV mode if the charger is online */
489 if (di->ac.charger_online) {
490 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
491 AB8500_CH_STATUS1_REG, &val);
492 if (ret < 0) {
493 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
494 return 0;
495 }
496
497 if (val & MAIN_CH_CV_ON)
498 ret = 1;
499 else
500 ret = 0;
501 }
502
503 return ret;
504 }
505
506 /**
507 * ab8500_charger_get_vbus_voltage() - get vbus voltage
508 * @di: pointer to the ab8500_charger structure
509 *
510 * This function returns the vbus voltage.
511 * Returns vbus voltage (on success)
512 */
513 static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
514 {
515 int vch;
516
517 /* Only measure voltage if the charger is connected */
518 if (di->usb.charger_connected) {
519 vch = ab8500_gpadc_convert(di->gpadc, VBUS_V);
520 if (vch < 0)
521 dev_err(di->dev, "%s gpadc conv failed\n", __func__);
522 } else {
523 vch = 0;
524 }
525 return vch;
526 }
527
528 /**
529 * ab8500_charger_get_usb_current() - get usb charger current
530 * @di: pointer to the ab8500_charger structure
531 *
532 * This function returns the usb charger current.
533 * Returns usb current (on success) and error code on failure
534 */
535 static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
536 {
537 int ich;
538
539 /* Only measure current if the charger is online */
540 if (di->usb.charger_online) {
541 ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C);
542 if (ich < 0)
543 dev_err(di->dev, "%s gpadc conv failed\n", __func__);
544 } else {
545 ich = 0;
546 }
547 return ich;
548 }
549
550 /**
551 * ab8500_charger_get_ac_current() - get ac charger current
552 * @di: pointer to the ab8500_charger structure
553 *
554 * This function returns the ac charger current.
555 * Returns ac current (on success) and error code on failure.
556 */
557 static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
558 {
559 int ich;
560
561 /* Only measure current if the charger is online */
562 if (di->ac.charger_online) {
563 ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C);
564 if (ich < 0)
565 dev_err(di->dev, "%s gpadc conv failed\n", __func__);
566 } else {
567 ich = 0;
568 }
569 return ich;
570 }
571
572 /**
573 * ab8500_charger_usb_cv() - check if the usb charger is in CV mode
574 * @di: pointer to the ab8500_charger structure
575 *
576 * Returns ac charger CV mode (on success) else error code
577 */
578 static int ab8500_charger_usb_cv(struct ab8500_charger *di)
579 {
580 int ret;
581 u8 val;
582
583 /* Only check CV mode if the charger is online */
584 if (di->usb.charger_online) {
585 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
586 AB8500_CH_USBCH_STAT1_REG, &val);
587 if (ret < 0) {
588 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
589 return 0;
590 }
591
592 if (val & USB_CH_CV_ON)
593 ret = 1;
594 else
595 ret = 0;
596 } else {
597 ret = 0;
598 }
599
600 return ret;
601 }
602
603 /**
604 * ab8500_charger_detect_chargers() - Detect the connected chargers
605 * @di: pointer to the ab8500_charger structure
606 * @probe: if probe, don't delay and wait for HW
607 *
608 * Returns the type of charger connected.
609 * For USB it will not mean we can actually charge from it
610 * but that there is a USB cable connected that we have to
611 * identify. This is used during startup when we don't get
612 * interrupts of the charger detection
613 *
614 * Returns an integer value, that means,
615 * NO_PW_CONN no power supply is connected
616 * AC_PW_CONN if the AC power supply is connected
617 * USB_PW_CONN if the USB power supply is connected
618 * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected
619 */
620 static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe)
621 {
622 int result = NO_PW_CONN;
623 int ret;
624 u8 val;
625
626 /* Check for AC charger */
627 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
628 AB8500_CH_STATUS1_REG, &val);
629 if (ret < 0) {
630 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
631 return ret;
632 }
633
634 if (val & MAIN_CH_DET)
635 result = AC_PW_CONN;
636
637 /* Check for USB charger */
638
639 if (!probe) {
640 /*
641 * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100
642 * when disconnecting ACA even though no
643 * charger was connected. Try waiting a little
644 * longer than the 100 ms of VBUS_DET_DBNC100...
645 */
646 msleep(110);
647 }
648 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
649 AB8500_CH_USBCH_STAT1_REG, &val);
650 if (ret < 0) {
651 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
652 return ret;
653 }
654 dev_dbg(di->dev,
655 "%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__,
656 val);
657 if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100))
658 result |= USB_PW_CONN;
659
660 return result;
661 }
662
663 /**
664 * ab8500_charger_max_usb_curr() - get the max curr for the USB type
665 * @di: pointer to the ab8500_charger structure
666 * @link_status: the identified USB type
667 *
668 * Get the maximum current that is allowed to be drawn from the host
669 * based on the USB type.
670 * Returns error code in case of failure else 0 on success
671 */
672 static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
673 enum ab8500_charger_link_status link_status)
674 {
675 int ret = 0;
676
677 di->usb_device_is_unrecognised = false;
678
679 /*
680 * Platform only supports USB 2.0.
681 * This means that charging current from USB source
682 * is maximum 500 mA. Every occurence of USB_STAT_*_HOST_*
683 * should set USB_CH_IP_CUR_LVL_0P5.
684 */
685
686 switch (link_status) {
687 case USB_STAT_STD_HOST_NC:
688 case USB_STAT_STD_HOST_C_NS:
689 case USB_STAT_STD_HOST_C_S:
690 dev_dbg(di->dev, "USB Type - Standard host is "
691 "detected through USB driver\n");
692 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
693 di->is_aca_rid = 0;
694 break;
695 case USB_STAT_HOST_CHG_HS_CHIRP:
696 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
697 di->is_aca_rid = 0;
698 break;
699 case USB_STAT_HOST_CHG_HS:
700 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
701 di->is_aca_rid = 0;
702 break;
703 case USB_STAT_ACA_RID_C_HS:
704 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P9;
705 di->is_aca_rid = 0;
706 break;
707 case USB_STAT_ACA_RID_A:
708 /*
709 * Dedicated charger level minus maximum current accessory
710 * can consume (900mA). Closest level is 500mA
711 */
712 dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n");
713 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
714 di->is_aca_rid = 1;
715 break;
716 case USB_STAT_ACA_RID_B:
717 /*
718 * Dedicated charger level minus 120mA (20mA for ACA and
719 * 100mA for potential accessory). Closest level is 1300mA
720 */
721 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P3;
722 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
723 di->max_usb_in_curr.usb_type_max);
724 di->is_aca_rid = 1;
725 break;
726 case USB_STAT_HOST_CHG_NM:
727 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
728 di->is_aca_rid = 0;
729 break;
730 case USB_STAT_DEDICATED_CHG:
731 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
732 di->is_aca_rid = 0;
733 break;
734 case USB_STAT_ACA_RID_C_HS_CHIRP:
735 case USB_STAT_ACA_RID_C_NM:
736 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
737 di->is_aca_rid = 1;
738 break;
739 case USB_STAT_NOT_CONFIGURED:
740 if (di->vbus_detected) {
741 di->usb_device_is_unrecognised = true;
742 dev_dbg(di->dev, "USB Type - Legacy charger.\n");
743 di->max_usb_in_curr.usb_type_max =
744 USB_CH_IP_CUR_LVL_1P5;
745 break;
746 }
747 case USB_STAT_HM_IDGND:
748 dev_err(di->dev, "USB Type - Charging not allowed\n");
749 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
750 ret = -ENXIO;
751 break;
752 case USB_STAT_RESERVED:
753 if (is_ab8500(di->parent)) {
754 di->flags.vbus_collapse = true;
755 dev_err(di->dev, "USB Type - USB_STAT_RESERVED "
756 "VBUS has collapsed\n");
757 ret = -ENXIO;
758 break;
759 } else {
760 dev_dbg(di->dev, "USB Type - Charging not allowed\n");
761 di->max_usb_in_curr.usb_type_max =
762 USB_CH_IP_CUR_LVL_0P05;
763 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
764 link_status,
765 di->max_usb_in_curr.usb_type_max);
766 ret = -ENXIO;
767 break;
768 }
769 case USB_STAT_CARKIT_1:
770 case USB_STAT_CARKIT_2:
771 case USB_STAT_ACA_DOCK_CHARGER:
772 case USB_STAT_CHARGER_LINE_1:
773 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
774 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
775 di->max_usb_in_curr.usb_type_max);
776 break;
777 case USB_STAT_NOT_VALID_LINK:
778 dev_err(di->dev, "USB Type invalid - try charging anyway\n");
779 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
780 break;
781
782 default:
783 dev_err(di->dev, "USB Type - Unknown\n");
784 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
785 ret = -ENXIO;
786 break;
787 };
788
789 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
790 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
791 link_status, di->max_usb_in_curr.set_max);
792
793 return ret;
794 }
795
796 /**
797 * ab8500_charger_read_usb_type() - read the type of usb connected
798 * @di: pointer to the ab8500_charger structure
799 *
800 * Detect the type of the plugged USB
801 * Returns error code in case of failure else 0 on success
802 */
803 static int ab8500_charger_read_usb_type(struct ab8500_charger *di)
804 {
805 int ret;
806 u8 val;
807
808 ret = abx500_get_register_interruptible(di->dev,
809 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val);
810 if (ret < 0) {
811 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
812 return ret;
813 }
814 if (is_ab8500(di->parent))
815 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
816 AB8500_USB_LINE_STAT_REG, &val);
817 else
818 ret = abx500_get_register_interruptible(di->dev,
819 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
820 if (ret < 0) {
821 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
822 return ret;
823 }
824
825 /* get the USB type */
826 if (is_ab8500(di->parent))
827 val = (val & AB8500_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
828 else
829 val = (val & AB8505_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
830 ret = ab8500_charger_max_usb_curr(di,
831 (enum ab8500_charger_link_status) val);
832
833 return ret;
834 }
835
836 /**
837 * ab8500_charger_detect_usb_type() - get the type of usb connected
838 * @di: pointer to the ab8500_charger structure
839 *
840 * Detect the type of the plugged USB
841 * Returns error code in case of failure else 0 on success
842 */
843 static int ab8500_charger_detect_usb_type(struct ab8500_charger *di)
844 {
845 int i, ret;
846 u8 val;
847
848 /*
849 * On getting the VBUS rising edge detect interrupt there
850 * is a 250ms delay after which the register UsbLineStatus
851 * is filled with valid data.
852 */
853 for (i = 0; i < 10; i++) {
854 msleep(250);
855 ret = abx500_get_register_interruptible(di->dev,
856 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG,
857 &val);
858 dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n",
859 __func__, val);
860 if (ret < 0) {
861 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
862 return ret;
863 }
864
865 if (is_ab8500(di->parent))
866 ret = abx500_get_register_interruptible(di->dev,
867 AB8500_USB, AB8500_USB_LINE_STAT_REG, &val);
868 else
869 ret = abx500_get_register_interruptible(di->dev,
870 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
871 if (ret < 0) {
872 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
873 return ret;
874 }
875 dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__,
876 val);
877 /*
878 * Until the IT source register is read the UsbLineStatus
879 * register is not updated, hence doing the same
880 * Revisit this:
881 */
882
883 /* get the USB type */
884 if (is_ab8500(di->parent))
885 val = (val & AB8500_USB_LINK_STATUS) >>
886 USB_LINK_STATUS_SHIFT;
887 else
888 val = (val & AB8505_USB_LINK_STATUS) >>
889 USB_LINK_STATUS_SHIFT;
890 if (val)
891 break;
892 }
893 ret = ab8500_charger_max_usb_curr(di,
894 (enum ab8500_charger_link_status) val);
895
896 return ret;
897 }
898
899 /*
900 * This array maps the raw hex value to charger voltage used by the AB8500
901 * Values taken from the UM0836
902 */
903 static int ab8500_charger_voltage_map[] = {
904 3500 ,
905 3525 ,
906 3550 ,
907 3575 ,
908 3600 ,
909 3625 ,
910 3650 ,
911 3675 ,
912 3700 ,
913 3725 ,
914 3750 ,
915 3775 ,
916 3800 ,
917 3825 ,
918 3850 ,
919 3875 ,
920 3900 ,
921 3925 ,
922 3950 ,
923 3975 ,
924 4000 ,
925 4025 ,
926 4050 ,
927 4060 ,
928 4070 ,
929 4080 ,
930 4090 ,
931 4100 ,
932 4110 ,
933 4120 ,
934 4130 ,
935 4140 ,
936 4150 ,
937 4160 ,
938 4170 ,
939 4180 ,
940 4190 ,
941 4200 ,
942 4210 ,
943 4220 ,
944 4230 ,
945 4240 ,
946 4250 ,
947 4260 ,
948 4270 ,
949 4280 ,
950 4290 ,
951 4300 ,
952 4310 ,
953 4320 ,
954 4330 ,
955 4340 ,
956 4350 ,
957 4360 ,
958 4370 ,
959 4380 ,
960 4390 ,
961 4400 ,
962 4410 ,
963 4420 ,
964 4430 ,
965 4440 ,
966 4450 ,
967 4460 ,
968 4470 ,
969 4480 ,
970 4490 ,
971 4500 ,
972 4510 ,
973 4520 ,
974 4530 ,
975 4540 ,
976 4550 ,
977 4560 ,
978 4570 ,
979 4580 ,
980 4590 ,
981 4600 ,
982 };
983
984 static int ab8500_voltage_to_regval(int voltage)
985 {
986 int i;
987
988 /* Special case for voltage below 3.5V */
989 if (voltage < ab8500_charger_voltage_map[0])
990 return LOW_VOLT_REG;
991
992 for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) {
993 if (voltage < ab8500_charger_voltage_map[i])
994 return i - 1;
995 }
996
997 /* If not last element, return error */
998 i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1;
999 if (voltage == ab8500_charger_voltage_map[i])
1000 return i;
1001 else
1002 return -1;
1003 }
1004
1005 static int ab8500_current_to_regval(struct ab8500_charger *di, int curr)
1006 {
1007 int i;
1008
1009 if (curr < di->bm->chg_output_curr[0])
1010 return 0;
1011
1012 for (i = 0; i < di->bm->n_chg_out_curr; i++) {
1013 if (curr < di->bm->chg_output_curr[i])
1014 return i - 1;
1015 }
1016
1017 /* If not last element, return error */
1018 i = di->bm->n_chg_out_curr - 1;
1019 if (curr == di->bm->chg_output_curr[i])
1020 return i;
1021 else
1022 return -1;
1023 }
1024
1025 static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr)
1026 {
1027 int i;
1028
1029 if (curr < di->bm->chg_input_curr[0])
1030 return 0;
1031
1032 for (i = 0; i < di->bm->n_chg_in_curr; i++) {
1033 if (curr < di->bm->chg_input_curr[i])
1034 return i - 1;
1035 }
1036
1037 /* If not last element, return error */
1038 i = di->bm->n_chg_in_curr - 1;
1039 if (curr == di->bm->chg_input_curr[i])
1040 return i;
1041 else
1042 return -1;
1043 }
1044
1045 /**
1046 * ab8500_charger_get_usb_cur() - get usb current
1047 * @di: pointer to the ab8500_charger structre
1048 *
1049 * The usb stack provides the maximum current that can be drawn from
1050 * the standard usb host. This will be in mA.
1051 * This function converts current in mA to a value that can be written
1052 * to the register. Returns -1 if charging is not allowed
1053 */
1054 static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
1055 {
1056 int ret = 0;
1057 switch (di->usb_state.usb_current) {
1058 case 100:
1059 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P09;
1060 break;
1061 case 200:
1062 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P19;
1063 break;
1064 case 300:
1065 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P29;
1066 break;
1067 case 400:
1068 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P38;
1069 break;
1070 case 500:
1071 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
1072 break;
1073 default:
1074 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
1075 ret = -EPERM;
1076 break;
1077 };
1078 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
1079 return ret;
1080 }
1081
1082 /**
1083 * ab8500_charger_check_continue_stepping() - Check to allow stepping
1084 * @di: pointer to the ab8500_charger structure
1085 * @reg: select what charger register to check
1086 *
1087 * Check if current stepping should be allowed to continue.
1088 * Checks if charger source has not collapsed. If it has, further stepping
1089 * is not allowed.
1090 */
1091 static bool ab8500_charger_check_continue_stepping(struct ab8500_charger *di,
1092 int reg)
1093 {
1094 if (reg == AB8500_USBCH_IPT_CRNTLVL_REG)
1095 return !di->flags.vbus_drop_end;
1096 else
1097 return true;
1098 }
1099
1100 /**
1101 * ab8500_charger_set_current() - set charger current
1102 * @di: pointer to the ab8500_charger structure
1103 * @ich: charger current, in mA
1104 * @reg: select what charger register to set
1105 *
1106 * Set charger current.
1107 * There is no state machine in the AB to step up/down the charger
1108 * current to avoid dips and spikes on MAIN, VBUS and VBAT when
1109 * charging is started. Instead we need to implement
1110 * this charger current step-up/down here.
1111 * Returns error code in case of failure else 0(on success)
1112 */
1113 static int ab8500_charger_set_current(struct ab8500_charger *di,
1114 int ich, int reg)
1115 {
1116 int ret = 0;
1117 int curr_index, prev_curr_index, shift_value, i;
1118 u8 reg_value;
1119 u32 step_udelay;
1120 bool no_stepping = false;
1121
1122 atomic_inc(&di->current_stepping_sessions);
1123
1124 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1125 reg, &reg_value);
1126 if (ret < 0) {
1127 dev_err(di->dev, "%s read failed\n", __func__);
1128 goto exit_set_current;
1129 }
1130
1131 switch (reg) {
1132 case AB8500_MCH_IPT_CURLVL_REG:
1133 shift_value = MAIN_CH_INPUT_CURR_SHIFT;
1134 prev_curr_index = (reg_value >> shift_value);
1135 curr_index = ab8500_current_to_regval(di, ich);
1136 step_udelay = STEP_UDELAY;
1137 if (!di->ac.charger_connected)
1138 no_stepping = true;
1139 break;
1140 case AB8500_USBCH_IPT_CRNTLVL_REG:
1141 if (is_ab8540(di->parent))
1142 shift_value = AB8540_VBUS_IN_CURR_LIM_SHIFT;
1143 else
1144 shift_value = VBUS_IN_CURR_LIM_SHIFT;
1145 prev_curr_index = (reg_value >> shift_value);
1146 curr_index = ab8500_vbus_in_curr_to_regval(di, ich);
1147 step_udelay = STEP_UDELAY * 100;
1148
1149 if (!di->usb.charger_connected)
1150 no_stepping = true;
1151 break;
1152 case AB8500_CH_OPT_CRNTLVL_REG:
1153 shift_value = 0;
1154 prev_curr_index = (reg_value >> shift_value);
1155 curr_index = ab8500_current_to_regval(di, ich);
1156 step_udelay = STEP_UDELAY;
1157 if (curr_index && (curr_index - prev_curr_index) > 1)
1158 step_udelay *= 100;
1159
1160 if (!di->usb.charger_connected && !di->ac.charger_connected)
1161 no_stepping = true;
1162
1163 break;
1164 default:
1165 dev_err(di->dev, "%s current register not valid\n", __func__);
1166 ret = -ENXIO;
1167 goto exit_set_current;
1168 }
1169
1170 if (curr_index < 0) {
1171 dev_err(di->dev, "requested current limit out-of-range\n");
1172 ret = -ENXIO;
1173 goto exit_set_current;
1174 }
1175
1176 /* only update current if it's been changed */
1177 if (prev_curr_index == curr_index) {
1178 dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n",
1179 __func__, reg);
1180 ret = 0;
1181 goto exit_set_current;
1182 }
1183
1184 dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n",
1185 __func__, ich, reg);
1186
1187 if (no_stepping) {
1188 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1189 reg, (u8)curr_index << shift_value);
1190 if (ret)
1191 dev_err(di->dev, "%s write failed\n", __func__);
1192 } else if (prev_curr_index > curr_index) {
1193 for (i = prev_curr_index - 1; i >= curr_index; i--) {
1194 dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n",
1195 (u8) i << shift_value, reg);
1196 ret = abx500_set_register_interruptible(di->dev,
1197 AB8500_CHARGER, reg, (u8)i << shift_value);
1198 if (ret) {
1199 dev_err(di->dev, "%s write failed\n", __func__);
1200 goto exit_set_current;
1201 }
1202 if (i != curr_index)
1203 usleep_range(step_udelay, step_udelay * 2);
1204 }
1205 } else {
1206 bool allow = true;
1207 for (i = prev_curr_index + 1; i <= curr_index && allow; i++) {
1208 dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n",
1209 (u8)i << shift_value, reg);
1210 ret = abx500_set_register_interruptible(di->dev,
1211 AB8500_CHARGER, reg, (u8)i << shift_value);
1212 if (ret) {
1213 dev_err(di->dev, "%s write failed\n", __func__);
1214 goto exit_set_current;
1215 }
1216 if (i != curr_index)
1217 usleep_range(step_udelay, step_udelay * 2);
1218
1219 allow = ab8500_charger_check_continue_stepping(di, reg);
1220 }
1221 }
1222
1223 exit_set_current:
1224 atomic_dec(&di->current_stepping_sessions);
1225
1226 return ret;
1227 }
1228
1229 /**
1230 * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
1231 * @di: pointer to the ab8500_charger structure
1232 * @ich_in: charger input current limit
1233 *
1234 * Sets the current that can be drawn from the USB host
1235 * Returns error code in case of failure else 0(on success)
1236 */
1237 static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
1238 int ich_in)
1239 {
1240 int min_value;
1241 int ret;
1242
1243 /* We should always use to lowest current limit */
1244 min_value = min(di->bm->chg_params->usb_curr_max, ich_in);
1245 if (di->max_usb_in_curr.set_max > 0)
1246 min_value = min(di->max_usb_in_curr.set_max, min_value);
1247
1248 if (di->usb_state.usb_current >= 0)
1249 min_value = min(di->usb_state.usb_current, min_value);
1250
1251 switch (min_value) {
1252 case 100:
1253 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1254 min_value = USB_CH_IP_CUR_LVL_0P05;
1255 break;
1256 case 500:
1257 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1258 min_value = USB_CH_IP_CUR_LVL_0P45;
1259 break;
1260 default:
1261 break;
1262 }
1263
1264 dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value);
1265
1266 mutex_lock(&di->usb_ipt_crnt_lock);
1267 ret = ab8500_charger_set_current(di, min_value,
1268 AB8500_USBCH_IPT_CRNTLVL_REG);
1269 mutex_unlock(&di->usb_ipt_crnt_lock);
1270
1271 return ret;
1272 }
1273
1274 /**
1275 * ab8500_charger_set_main_in_curr() - set main charger input current
1276 * @di: pointer to the ab8500_charger structure
1277 * @ich_in: input charger current, in mA
1278 *
1279 * Set main charger input current.
1280 * Returns error code in case of failure else 0(on success)
1281 */
1282 static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di,
1283 int ich_in)
1284 {
1285 return ab8500_charger_set_current(di, ich_in,
1286 AB8500_MCH_IPT_CURLVL_REG);
1287 }
1288
1289 /**
1290 * ab8500_charger_set_output_curr() - set charger output current
1291 * @di: pointer to the ab8500_charger structure
1292 * @ich_out: output charger current, in mA
1293 *
1294 * Set charger output current.
1295 * Returns error code in case of failure else 0(on success)
1296 */
1297 static int ab8500_charger_set_output_curr(struct ab8500_charger *di,
1298 int ich_out)
1299 {
1300 return ab8500_charger_set_current(di, ich_out,
1301 AB8500_CH_OPT_CRNTLVL_REG);
1302 }
1303
1304 /**
1305 * ab8500_charger_led_en() - turn on/off chargign led
1306 * @di: pointer to the ab8500_charger structure
1307 * @on: flag to turn on/off the chargign led
1308 *
1309 * Power ON/OFF charging LED indication
1310 * Returns error code in case of failure else 0(on success)
1311 */
1312 static int ab8500_charger_led_en(struct ab8500_charger *di, int on)
1313 {
1314 int ret;
1315
1316 if (on) {
1317 /* Power ON charging LED indicator, set LED current to 5mA */
1318 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1319 AB8500_LED_INDICATOR_PWM_CTRL,
1320 (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA));
1321 if (ret) {
1322 dev_err(di->dev, "Power ON LED failed\n");
1323 return ret;
1324 }
1325 /* LED indicator PWM duty cycle 252/256 */
1326 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1327 AB8500_LED_INDICATOR_PWM_DUTY,
1328 LED_INDICATOR_PWM_DUTY_252_256);
1329 if (ret) {
1330 dev_err(di->dev, "Set LED PWM duty cycle failed\n");
1331 return ret;
1332 }
1333 } else {
1334 /* Power off charging LED indicator */
1335 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1336 AB8500_LED_INDICATOR_PWM_CTRL,
1337 LED_INDICATOR_PWM_DIS);
1338 if (ret) {
1339 dev_err(di->dev, "Power-off LED failed\n");
1340 return ret;
1341 }
1342 }
1343
1344 return ret;
1345 }
1346
1347 /**
1348 * ab8500_charger_ac_en() - enable or disable ac charging
1349 * @di: pointer to the ab8500_charger structure
1350 * @enable: enable/disable flag
1351 * @vset: charging voltage
1352 * @iset: charging current
1353 *
1354 * Enable/Disable AC/Mains charging and turns on/off the charging led
1355 * respectively.
1356 **/
1357 static int ab8500_charger_ac_en(struct ux500_charger *charger,
1358 int enable, int vset, int iset)
1359 {
1360 int ret;
1361 int volt_index;
1362 int curr_index;
1363 int input_curr_index;
1364 u8 overshoot = 0;
1365
1366 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1367
1368 if (enable) {
1369 /* Check if AC is connected */
1370 if (!di->ac.charger_connected) {
1371 dev_err(di->dev, "AC charger not connected\n");
1372 return -ENXIO;
1373 }
1374
1375 /* Enable AC charging */
1376 dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset);
1377
1378 /*
1379 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1380 * will be triggered everytime we enable the VDD ADC supply.
1381 * This will turn off charging for a short while.
1382 * It can be avoided by having the supply on when
1383 * there is a charger enabled. Normally the VDD ADC supply
1384 * is enabled everytime a GPADC conversion is triggered. We will
1385 * force it to be enabled from this driver to have
1386 * the GPADC module independant of the AB8500 chargers
1387 */
1388 if (!di->vddadc_en_ac) {
1389 ret = regulator_enable(di->regu);
1390 if (ret)
1391 dev_warn(di->dev,
1392 "Failed to enable regulator\n");
1393 else
1394 di->vddadc_en_ac = true;
1395 }
1396
1397 /* Check if the requested voltage or current is valid */
1398 volt_index = ab8500_voltage_to_regval(vset);
1399 curr_index = ab8500_current_to_regval(di, iset);
1400 input_curr_index = ab8500_current_to_regval(di,
1401 di->bm->chg_params->ac_curr_max);
1402 if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
1403 dev_err(di->dev,
1404 "Charger voltage or current too high, "
1405 "charging not started\n");
1406 return -ENXIO;
1407 }
1408
1409 /* ChVoltLevel: maximum battery charging voltage */
1410 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1411 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1412 if (ret) {
1413 dev_err(di->dev, "%s write failed\n", __func__);
1414 return ret;
1415 }
1416 /* MainChInputCurr: current that can be drawn from the charger*/
1417 ret = ab8500_charger_set_main_in_curr(di,
1418 di->bm->chg_params->ac_curr_max);
1419 if (ret) {
1420 dev_err(di->dev, "%s Failed to set MainChInputCurr\n",
1421 __func__);
1422 return ret;
1423 }
1424 /* ChOutputCurentLevel: protected output current */
1425 ret = ab8500_charger_set_output_curr(di, iset);
1426 if (ret) {
1427 dev_err(di->dev, "%s "
1428 "Failed to set ChOutputCurentLevel\n",
1429 __func__);
1430 return ret;
1431 }
1432
1433 /* Check if VBAT overshoot control should be enabled */
1434 if (!di->bm->enable_overshoot)
1435 overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;
1436
1437 /* Enable Main Charger */
1438 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1439 AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot);
1440 if (ret) {
1441 dev_err(di->dev, "%s write failed\n", __func__);
1442 return ret;
1443 }
1444
1445 /* Power on charging LED indication */
1446 ret = ab8500_charger_led_en(di, true);
1447 if (ret < 0)
1448 dev_err(di->dev, "failed to enable LED\n");
1449
1450 di->ac.charger_online = 1;
1451 } else {
1452 /* Disable AC charging */
1453 if (is_ab8500_1p1_or_earlier(di->parent)) {
1454 /*
1455 * For ABB revision 1.0 and 1.1 there is a bug in the
1456 * watchdog logic. That means we have to continously
1457 * kick the charger watchdog even when no charger is
1458 * connected. This is only valid once the AC charger
1459 * has been enabled. This is a bug that is not handled
1460 * by the algorithm and the watchdog have to be kicked
1461 * by the charger driver when the AC charger
1462 * is disabled
1463 */
1464 if (di->ac_conn) {
1465 queue_delayed_work(di->charger_wq,
1466 &di->kick_wd_work,
1467 round_jiffies(WD_KICK_INTERVAL));
1468 }
1469
1470 /*
1471 * We can't turn off charging completely
1472 * due to a bug in AB8500 cut1.
1473 * If we do, charging will not start again.
1474 * That is why we set the lowest voltage
1475 * and current possible
1476 */
1477 ret = abx500_set_register_interruptible(di->dev,
1478 AB8500_CHARGER,
1479 AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5);
1480 if (ret) {
1481 dev_err(di->dev,
1482 "%s write failed\n", __func__);
1483 return ret;
1484 }
1485
1486 ret = ab8500_charger_set_output_curr(di, 0);
1487 if (ret) {
1488 dev_err(di->dev, "%s "
1489 "Failed to set ChOutputCurentLevel\n",
1490 __func__);
1491 return ret;
1492 }
1493 } else {
1494 ret = abx500_set_register_interruptible(di->dev,
1495 AB8500_CHARGER,
1496 AB8500_MCH_CTRL1, 0);
1497 if (ret) {
1498 dev_err(di->dev,
1499 "%s write failed\n", __func__);
1500 return ret;
1501 }
1502 }
1503
1504 ret = ab8500_charger_led_en(di, false);
1505 if (ret < 0)
1506 dev_err(di->dev, "failed to disable LED\n");
1507
1508 di->ac.charger_online = 0;
1509 di->ac.wd_expired = false;
1510
1511 /* Disable regulator if enabled */
1512 if (di->vddadc_en_ac) {
1513 regulator_disable(di->regu);
1514 di->vddadc_en_ac = false;
1515 }
1516
1517 dev_dbg(di->dev, "%s Disabled AC charging\n", __func__);
1518 }
1519 ab8500_power_supply_changed(di, di->ac_chg.psy);
1520
1521 return ret;
1522 }
1523
1524 /**
1525 * ab8500_charger_usb_en() - enable usb charging
1526 * @di: pointer to the ab8500_charger structure
1527 * @enable: enable/disable flag
1528 * @vset: charging voltage
1529 * @ich_out: charger output current
1530 *
1531 * Enable/Disable USB charging and turns on/off the charging led respectively.
1532 * Returns error code in case of failure else 0(on success)
1533 */
1534 static int ab8500_charger_usb_en(struct ux500_charger *charger,
1535 int enable, int vset, int ich_out)
1536 {
1537 int ret;
1538 int volt_index;
1539 int curr_index;
1540 u8 overshoot = 0;
1541
1542 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1543
1544 if (enable) {
1545 /* Check if USB is connected */
1546 if (!di->usb.charger_connected) {
1547 dev_err(di->dev, "USB charger not connected\n");
1548 return -ENXIO;
1549 }
1550
1551 /*
1552 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1553 * will be triggered everytime we enable the VDD ADC supply.
1554 * This will turn off charging for a short while.
1555 * It can be avoided by having the supply on when
1556 * there is a charger enabled. Normally the VDD ADC supply
1557 * is enabled everytime a GPADC conversion is triggered. We will
1558 * force it to be enabled from this driver to have
1559 * the GPADC module independant of the AB8500 chargers
1560 */
1561 if (!di->vddadc_en_usb) {
1562 ret = regulator_enable(di->regu);
1563 if (ret)
1564 dev_warn(di->dev,
1565 "Failed to enable regulator\n");
1566 else
1567 di->vddadc_en_usb = true;
1568 }
1569
1570 /* Enable USB charging */
1571 dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out);
1572
1573 /* Check if the requested voltage or current is valid */
1574 volt_index = ab8500_voltage_to_regval(vset);
1575 curr_index = ab8500_current_to_regval(di, ich_out);
1576 if (volt_index < 0 || curr_index < 0) {
1577 dev_err(di->dev,
1578 "Charger voltage or current too high, "
1579 "charging not started\n");
1580 return -ENXIO;
1581 }
1582
1583 /* ChVoltLevel: max voltage upto which battery can be charged */
1584 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1585 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1586 if (ret) {
1587 dev_err(di->dev, "%s write failed\n", __func__);
1588 return ret;
1589 }
1590 /* Check if VBAT overshoot control should be enabled */
1591 if (!di->bm->enable_overshoot)
1592 overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;
1593
1594 /* Enable USB Charger */
1595 dev_dbg(di->dev,
1596 "Enabling USB with write to AB8500_USBCH_CTRL1_REG\n");
1597 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1598 AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot);
1599 if (ret) {
1600 dev_err(di->dev, "%s write failed\n", __func__);
1601 return ret;
1602 }
1603
1604 /* If success power on charging LED indication */
1605 ret = ab8500_charger_led_en(di, true);
1606 if (ret < 0)
1607 dev_err(di->dev, "failed to enable LED\n");
1608
1609 di->usb.charger_online = 1;
1610
1611 /* USBChInputCurr: current that can be drawn from the usb */
1612 ret = ab8500_charger_set_vbus_in_curr(di,
1613 di->max_usb_in_curr.usb_type_max);
1614 if (ret) {
1615 dev_err(di->dev, "setting USBChInputCurr failed\n");
1616 return ret;
1617 }
1618
1619 /* ChOutputCurentLevel: protected output current */
1620 ret = ab8500_charger_set_output_curr(di, ich_out);
1621 if (ret) {
1622 dev_err(di->dev, "%s "
1623 "Failed to set ChOutputCurentLevel\n",
1624 __func__);
1625 return ret;
1626 }
1627
1628 queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);
1629
1630 } else {
1631 /* Disable USB charging */
1632 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1633 ret = abx500_set_register_interruptible(di->dev,
1634 AB8500_CHARGER,
1635 AB8500_USBCH_CTRL1_REG, 0);
1636 if (ret) {
1637 dev_err(di->dev,
1638 "%s write failed\n", __func__);
1639 return ret;
1640 }
1641
1642 ret = ab8500_charger_led_en(di, false);
1643 if (ret < 0)
1644 dev_err(di->dev, "failed to disable LED\n");
1645 /* USBChInputCurr: current that can be drawn from the usb */
1646 ret = ab8500_charger_set_vbus_in_curr(di, 0);
1647 if (ret) {
1648 dev_err(di->dev, "setting USBChInputCurr failed\n");
1649 return ret;
1650 }
1651
1652 /* ChOutputCurentLevel: protected output current */
1653 ret = ab8500_charger_set_output_curr(di, 0);
1654 if (ret) {
1655 dev_err(di->dev, "%s "
1656 "Failed to reset ChOutputCurentLevel\n",
1657 __func__);
1658 return ret;
1659 }
1660 di->usb.charger_online = 0;
1661 di->usb.wd_expired = false;
1662
1663 /* Disable regulator if enabled */
1664 if (di->vddadc_en_usb) {
1665 regulator_disable(di->regu);
1666 di->vddadc_en_usb = false;
1667 }
1668
1669 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1670
1671 /* Cancel any pending Vbat check work */
1672 cancel_delayed_work(&di->check_vbat_work);
1673
1674 }
1675 ab8500_power_supply_changed(di, di->usb_chg.psy);
1676
1677 return ret;
1678 }
1679
1680 static int ab8500_external_charger_prepare(struct notifier_block *charger_nb,
1681 unsigned long event, void *data)
1682 {
1683 int ret;
1684 struct device *dev = data;
1685 /*Toggle External charger control pin*/
1686 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1687 AB8500_SYS_CHARGER_CONTROL_REG,
1688 EXTERNAL_CHARGER_DISABLE_REG_VAL);
1689 if (ret < 0) {
1690 dev_err(dev, "write reg failed %d\n", ret);
1691 goto out;
1692 }
1693 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1694 AB8500_SYS_CHARGER_CONTROL_REG,
1695 EXTERNAL_CHARGER_ENABLE_REG_VAL);
1696 if (ret < 0)
1697 dev_err(dev, "Write reg failed %d\n", ret);
1698
1699 out:
1700 return ret;
1701 }
1702
1703 /**
1704 * ab8500_charger_usb_check_enable() - enable usb charging
1705 * @charger: pointer to the ux500_charger structure
1706 * @vset: charging voltage
1707 * @iset: charger output current
1708 *
1709 * Check if the VBUS charger has been disconnected and reconnected without
1710 * AB8500 rising an interrupt. Returns 0 on success.
1711 */
1712 static int ab8500_charger_usb_check_enable(struct ux500_charger *charger,
1713 int vset, int iset)
1714 {
1715 u8 usbch_ctrl1 = 0;
1716 int ret = 0;
1717
1718 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1719
1720 if (!di->usb.charger_connected)
1721 return ret;
1722
1723 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1724 AB8500_USBCH_CTRL1_REG, &usbch_ctrl1);
1725 if (ret < 0) {
1726 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1727 return ret;
1728 }
1729 dev_dbg(di->dev, "USB charger ctrl: 0x%02x\n", usbch_ctrl1);
1730
1731 if (!(usbch_ctrl1 & USB_CH_ENA)) {
1732 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1733
1734 ret = abx500_mask_and_set_register_interruptible(di->dev,
1735 AB8500_CHARGER, AB8500_CHARGER_CTRL,
1736 DROP_COUNT_RESET, DROP_COUNT_RESET);
1737 if (ret < 0) {
1738 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1739 return ret;
1740 }
1741
1742 ret = ab8500_charger_usb_en(&di->usb_chg, true, vset, iset);
1743 if (ret < 0) {
1744 dev_err(di->dev, "Failed to enable VBUS charger %d\n",
1745 __LINE__);
1746 return ret;
1747 }
1748 }
1749 return ret;
1750 }
1751
1752 /**
1753 * ab8500_charger_ac_check_enable() - enable usb charging
1754 * @charger: pointer to the ux500_charger structure
1755 * @vset: charging voltage
1756 * @iset: charger output current
1757 *
1758 * Check if the AC charger has been disconnected and reconnected without
1759 * AB8500 rising an interrupt. Returns 0 on success.
1760 */
1761 static int ab8500_charger_ac_check_enable(struct ux500_charger *charger,
1762 int vset, int iset)
1763 {
1764 u8 mainch_ctrl1 = 0;
1765 int ret = 0;
1766
1767 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1768
1769 if (!di->ac.charger_connected)
1770 return ret;
1771
1772 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1773 AB8500_MCH_CTRL1, &mainch_ctrl1);
1774 if (ret < 0) {
1775 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1776 return ret;
1777 }
1778 dev_dbg(di->dev, "AC charger ctrl: 0x%02x\n", mainch_ctrl1);
1779
1780 if (!(mainch_ctrl1 & MAIN_CH_ENA)) {
1781 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1782
1783 ret = abx500_mask_and_set_register_interruptible(di->dev,
1784 AB8500_CHARGER, AB8500_CHARGER_CTRL,
1785 DROP_COUNT_RESET, DROP_COUNT_RESET);
1786
1787 if (ret < 0) {
1788 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1789 return ret;
1790 }
1791
1792 ret = ab8500_charger_ac_en(&di->usb_chg, true, vset, iset);
1793 if (ret < 0) {
1794 dev_err(di->dev, "failed to enable AC charger %d\n",
1795 __LINE__);
1796 return ret;
1797 }
1798 }
1799 return ret;
1800 }
1801
1802 /**
1803 * ab8500_charger_watchdog_kick() - kick charger watchdog
1804 * @di: pointer to the ab8500_charger structure
1805 *
1806 * Kick charger watchdog
1807 * Returns error code in case of failure else 0(on success)
1808 */
1809 static int ab8500_charger_watchdog_kick(struct ux500_charger *charger)
1810 {
1811 int ret;
1812 struct ab8500_charger *di;
1813
1814 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
1815 di = to_ab8500_charger_ac_device_info(charger);
1816 else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1817 di = to_ab8500_charger_usb_device_info(charger);
1818 else
1819 return -ENXIO;
1820
1821 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1822 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
1823 if (ret)
1824 dev_err(di->dev, "Failed to kick WD!\n");
1825
1826 return ret;
1827 }
1828
1829 /**
1830 * ab8500_charger_update_charger_current() - update charger current
1831 * @di: pointer to the ab8500_charger structure
1832 *
1833 * Update the charger output current for the specified charger
1834 * Returns error code in case of failure else 0(on success)
1835 */
1836 static int ab8500_charger_update_charger_current(struct ux500_charger *charger,
1837 int ich_out)
1838 {
1839 int ret;
1840 struct ab8500_charger *di;
1841
1842 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
1843 di = to_ab8500_charger_ac_device_info(charger);
1844 else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1845 di = to_ab8500_charger_usb_device_info(charger);
1846 else
1847 return -ENXIO;
1848
1849 ret = ab8500_charger_set_output_curr(di, ich_out);
1850 if (ret) {
1851 dev_err(di->dev, "%s "
1852 "Failed to set ChOutputCurentLevel\n",
1853 __func__);
1854 return ret;
1855 }
1856
1857 /* Reset the main and usb drop input current measurement counter */
1858 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1859 AB8500_CHARGER_CTRL, DROP_COUNT_RESET);
1860 if (ret) {
1861 dev_err(di->dev, "%s write failed\n", __func__);
1862 return ret;
1863 }
1864
1865 return ret;
1866 }
1867
1868 /**
1869 * ab8540_charger_power_path_enable() - enable usb power path mode
1870 * @charger: pointer to the ux500_charger structure
1871 * @enable: enable/disable flag
1872 *
1873 * Enable or disable the power path for usb mode
1874 * Returns error code in case of failure else 0(on success)
1875 */
1876 static int ab8540_charger_power_path_enable(struct ux500_charger *charger,
1877 bool enable)
1878 {
1879 int ret;
1880 struct ab8500_charger *di;
1881
1882 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1883 di = to_ab8500_charger_usb_device_info(charger);
1884 else
1885 return -ENXIO;
1886
1887 ret = abx500_mask_and_set_register_interruptible(di->dev,
1888 AB8500_CHARGER, AB8540_USB_PP_MODE_REG,
1889 BUS_POWER_PATH_MODE_ENA, enable);
1890 if (ret) {
1891 dev_err(di->dev, "%s write failed\n", __func__);
1892 return ret;
1893 }
1894
1895 return ret;
1896 }
1897
1898
1899 /**
1900 * ab8540_charger_usb_pre_chg_enable() - enable usb pre change
1901 * @charger: pointer to the ux500_charger structure
1902 * @enable: enable/disable flag
1903 *
1904 * Enable or disable the pre-chage for usb mode
1905 * Returns error code in case of failure else 0(on success)
1906 */
1907 static int ab8540_charger_usb_pre_chg_enable(struct ux500_charger *charger,
1908 bool enable)
1909 {
1910 int ret;
1911 struct ab8500_charger *di;
1912
1913 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1914 di = to_ab8500_charger_usb_device_info(charger);
1915 else
1916 return -ENXIO;
1917
1918 ret = abx500_mask_and_set_register_interruptible(di->dev,
1919 AB8500_CHARGER, AB8540_USB_PP_CHR_REG,
1920 BUS_POWER_PATH_PRECHG_ENA, enable);
1921 if (ret) {
1922 dev_err(di->dev, "%s write failed\n", __func__);
1923 return ret;
1924 }
1925
1926 return ret;
1927 }
1928
1929 static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
1930 {
1931 struct power_supply *psy;
1932 struct power_supply *ext;
1933 struct ab8500_charger *di;
1934 union power_supply_propval ret;
1935 int i, j;
1936 bool psy_found = false;
1937 struct ux500_charger *usb_chg;
1938
1939 usb_chg = (struct ux500_charger *)data;
1940 psy = usb_chg->psy;
1941
1942 di = to_ab8500_charger_usb_device_info(usb_chg);
1943
1944 ext = dev_get_drvdata(dev);
1945
1946 /* For all psy where the driver name appears in any supplied_to */
1947 for (i = 0; i < ext->num_supplicants; i++) {
1948 if (!strcmp(ext->supplied_to[i], psy->desc->name))
1949 psy_found = true;
1950 }
1951
1952 if (!psy_found)
1953 return 0;
1954
1955 /* Go through all properties for the psy */
1956 for (j = 0; j < ext->desc->num_properties; j++) {
1957 enum power_supply_property prop;
1958 prop = ext->desc->properties[j];
1959
1960 if (power_supply_get_property(ext, prop, &ret))
1961 continue;
1962
1963 switch (prop) {
1964 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1965 switch (ext->desc->type) {
1966 case POWER_SUPPLY_TYPE_BATTERY:
1967 di->vbat = ret.intval / 1000;
1968 break;
1969 default:
1970 break;
1971 }
1972 break;
1973 default:
1974 break;
1975 }
1976 }
1977 return 0;
1978 }
1979
1980 /**
1981 * ab8500_charger_check_vbat_work() - keep vbus current within spec
1982 * @work pointer to the work_struct structure
1983 *
1984 * Due to a asic bug it is necessary to lower the input current to the vbus
1985 * charger when charging with at some specific levels. This issue is only valid
1986 * for below a certain battery voltage. This function makes sure that the
1987 * the allowed current limit isn't exceeded.
1988 */
1989 static void ab8500_charger_check_vbat_work(struct work_struct *work)
1990 {
1991 int t = 10;
1992 struct ab8500_charger *di = container_of(work,
1993 struct ab8500_charger, check_vbat_work.work);
1994
1995 class_for_each_device(power_supply_class, NULL,
1996 di->usb_chg.psy, ab8500_charger_get_ext_psy_data);
1997
1998 /* First run old_vbat is 0. */
1999 if (di->old_vbat == 0)
2000 di->old_vbat = di->vbat;
2001
2002 if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED &&
2003 di->vbat <= VBAT_TRESH_IP_CUR_RED) ||
2004 (di->old_vbat > VBAT_TRESH_IP_CUR_RED &&
2005 di->vbat > VBAT_TRESH_IP_CUR_RED))) {
2006
2007 dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d,"
2008 " old: %d\n", di->max_usb_in_curr.usb_type_max,
2009 di->vbat, di->old_vbat);
2010 ab8500_charger_set_vbus_in_curr(di,
2011 di->max_usb_in_curr.usb_type_max);
2012 power_supply_changed(di->usb_chg.psy);
2013 }
2014
2015 di->old_vbat = di->vbat;
2016
2017 /*
2018 * No need to check the battery voltage every second when not close to
2019 * the threshold.
2020 */
2021 if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) &&
2022 (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100)))
2023 t = 1;
2024
2025 queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ);
2026 }
2027
2028 /**
2029 * ab8500_charger_check_hw_failure_work() - check main charger failure
2030 * @work: pointer to the work_struct structure
2031 *
2032 * Work queue function for checking the main charger status
2033 */
2034 static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
2035 {
2036 int ret;
2037 u8 reg_value;
2038
2039 struct ab8500_charger *di = container_of(work,
2040 struct ab8500_charger, check_hw_failure_work.work);
2041
2042 /* Check if the status bits for HW failure is still active */
2043 if (di->flags.mainextchnotok) {
2044 ret = abx500_get_register_interruptible(di->dev,
2045 AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
2046 if (ret < 0) {
2047 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2048 return;
2049 }
2050 if (!(reg_value & MAIN_CH_NOK)) {
2051 di->flags.mainextchnotok = false;
2052 ab8500_power_supply_changed(di, di->ac_chg.psy);
2053 }
2054 }
2055 if (di->flags.vbus_ovv) {
2056 ret = abx500_get_register_interruptible(di->dev,
2057 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG,
2058 &reg_value);
2059 if (ret < 0) {
2060 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2061 return;
2062 }
2063 if (!(reg_value & VBUS_OVV_TH)) {
2064 di->flags.vbus_ovv = false;
2065 ab8500_power_supply_changed(di, di->usb_chg.psy);
2066 }
2067 }
2068 /* If we still have a failure, schedule a new check */
2069 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
2070 queue_delayed_work(di->charger_wq,
2071 &di->check_hw_failure_work, round_jiffies(HZ));
2072 }
2073 }
2074
2075 /**
2076 * ab8500_charger_kick_watchdog_work() - kick the watchdog
2077 * @work: pointer to the work_struct structure
2078 *
2079 * Work queue function for kicking the charger watchdog.
2080 *
2081 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
2082 * logic. That means we have to continously kick the charger
2083 * watchdog even when no charger is connected. This is only
2084 * valid once the AC charger has been enabled. This is
2085 * a bug that is not handled by the algorithm and the
2086 * watchdog have to be kicked by the charger driver
2087 * when the AC charger is disabled
2088 */
2089 static void ab8500_charger_kick_watchdog_work(struct work_struct *work)
2090 {
2091 int ret;
2092
2093 struct ab8500_charger *di = container_of(work,
2094 struct ab8500_charger, kick_wd_work.work);
2095
2096 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
2097 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
2098 if (ret)
2099 dev_err(di->dev, "Failed to kick WD!\n");
2100
2101 /* Schedule a new watchdog kick */
2102 queue_delayed_work(di->charger_wq,
2103 &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL));
2104 }
2105
2106 /**
2107 * ab8500_charger_ac_work() - work to get and set main charger status
2108 * @work: pointer to the work_struct structure
2109 *
2110 * Work queue function for checking the main charger status
2111 */
2112 static void ab8500_charger_ac_work(struct work_struct *work)
2113 {
2114 int ret;
2115
2116 struct ab8500_charger *di = container_of(work,
2117 struct ab8500_charger, ac_work);
2118
2119 /*
2120 * Since we can't be sure that the events are received
2121 * synchronously, we have the check if the main charger is
2122 * connected by reading the status register
2123 */
2124 ret = ab8500_charger_detect_chargers(di, false);
2125 if (ret < 0)
2126 return;
2127
2128 if (ret & AC_PW_CONN) {
2129 di->ac.charger_connected = 1;
2130 di->ac_conn = true;
2131 } else {
2132 di->ac.charger_connected = 0;
2133 }
2134
2135 ab8500_power_supply_changed(di, di->ac_chg.psy);
2136 sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
2137 }
2138
2139 static void ab8500_charger_usb_attached_work(struct work_struct *work)
2140 {
2141 struct ab8500_charger *di = container_of(work,
2142 struct ab8500_charger,
2143 usb_charger_attached_work.work);
2144 int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC);
2145 int ret, i;
2146 u8 statval;
2147
2148 for (i = 0; i < 10; i++) {
2149 ret = abx500_get_register_interruptible(di->dev,
2150 AB8500_CHARGER,
2151 AB8500_CH_USBCH_STAT1_REG,
2152 &statval);
2153 if (ret < 0) {
2154 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2155 goto reschedule;
2156 }
2157 if ((statval & usbch) != usbch)
2158 goto reschedule;
2159
2160 msleep(CHARGER_STATUS_POLL);
2161 }
2162
2163 ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0);
2164
2165 mutex_lock(&di->charger_attached_mutex);
2166 mutex_unlock(&di->charger_attached_mutex);
2167
2168 return;
2169
2170 reschedule:
2171 queue_delayed_work(di->charger_wq,
2172 &di->usb_charger_attached_work,
2173 HZ);
2174 }
2175
2176 static void ab8500_charger_ac_attached_work(struct work_struct *work)
2177 {
2178
2179 struct ab8500_charger *di = container_of(work,
2180 struct ab8500_charger,
2181 ac_charger_attached_work.work);
2182 int mainch = (MAIN_CH_STATUS2_MAINCHGDROP |
2183 MAIN_CH_STATUS2_MAINCHARGERDETDBNC);
2184 int ret, i;
2185 u8 statval;
2186
2187 for (i = 0; i < 10; i++) {
2188 ret = abx500_get_register_interruptible(di->dev,
2189 AB8500_CHARGER,
2190 AB8500_CH_STATUS2_REG,
2191 &statval);
2192 if (ret < 0) {
2193 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2194 goto reschedule;
2195 }
2196
2197 if ((statval & mainch) != mainch)
2198 goto reschedule;
2199
2200 msleep(CHARGER_STATUS_POLL);
2201 }
2202
2203 ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0);
2204 queue_work(di->charger_wq, &di->ac_work);
2205
2206 mutex_lock(&di->charger_attached_mutex);
2207 mutex_unlock(&di->charger_attached_mutex);
2208
2209 return;
2210
2211 reschedule:
2212 queue_delayed_work(di->charger_wq,
2213 &di->ac_charger_attached_work,
2214 HZ);
2215 }
2216
2217 /**
2218 * ab8500_charger_detect_usb_type_work() - work to detect USB type
2219 * @work: Pointer to the work_struct structure
2220 *
2221 * Detect the type of USB plugged
2222 */
2223 static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
2224 {
2225 int ret;
2226
2227 struct ab8500_charger *di = container_of(work,
2228 struct ab8500_charger, detect_usb_type_work);
2229
2230 /*
2231 * Since we can't be sure that the events are received
2232 * synchronously, we have the check if is
2233 * connected by reading the status register
2234 */
2235 ret = ab8500_charger_detect_chargers(di, false);
2236 if (ret < 0)
2237 return;
2238
2239 if (!(ret & USB_PW_CONN)) {
2240 dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__);
2241 di->vbus_detected = false;
2242 ab8500_charger_set_usb_connected(di, false);
2243 ab8500_power_supply_changed(di, di->usb_chg.psy);
2244 } else {
2245 dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__);
2246 di->vbus_detected = true;
2247
2248 if (is_ab8500_1p1_or_earlier(di->parent)) {
2249 ret = ab8500_charger_detect_usb_type(di);
2250 if (!ret) {
2251 ab8500_charger_set_usb_connected(di, true);
2252 ab8500_power_supply_changed(di,
2253 di->usb_chg.psy);
2254 }
2255 } else {
2256 /*
2257 * For ABB cut2.0 and onwards we have an IRQ,
2258 * USB_LINK_STATUS that will be triggered when the USB
2259 * link status changes. The exception is USB connected
2260 * during startup. Then we don't get a
2261 * USB_LINK_STATUS IRQ
2262 */
2263 if (di->vbus_detected_start) {
2264 di->vbus_detected_start = false;
2265 ret = ab8500_charger_detect_usb_type(di);
2266 if (!ret) {
2267 ab8500_charger_set_usb_connected(di,
2268 true);
2269 ab8500_power_supply_changed(di,
2270 di->usb_chg.psy);
2271 }
2272 }
2273 }
2274 }
2275 }
2276
2277 /**
2278 * ab8500_charger_usb_link_attach_work() - work to detect USB type
2279 * @work: pointer to the work_struct structure
2280 *
2281 * Detect the type of USB plugged
2282 */
2283 static void ab8500_charger_usb_link_attach_work(struct work_struct *work)
2284 {
2285 struct ab8500_charger *di =
2286 container_of(work, struct ab8500_charger, attach_work.work);
2287 int ret;
2288
2289 /* Update maximum input current if USB enumeration is not detected */
2290 if (!di->usb.charger_online) {
2291 ret = ab8500_charger_set_vbus_in_curr(di,
2292 di->max_usb_in_curr.usb_type_max);
2293 if (ret)
2294 return;
2295 }
2296
2297 ab8500_charger_set_usb_connected(di, true);
2298 ab8500_power_supply_changed(di, di->usb_chg.psy);
2299 }
2300
2301 /**
2302 * ab8500_charger_usb_link_status_work() - work to detect USB type
2303 * @work: pointer to the work_struct structure
2304 *
2305 * Detect the type of USB plugged
2306 */
2307 static void ab8500_charger_usb_link_status_work(struct work_struct *work)
2308 {
2309 int detected_chargers;
2310 int ret;
2311 u8 val;
2312 u8 link_status;
2313
2314 struct ab8500_charger *di = container_of(work,
2315 struct ab8500_charger, usb_link_status_work);
2316
2317 /*
2318 * Since we can't be sure that the events are received
2319 * synchronously, we have the check if is
2320 * connected by reading the status register
2321 */
2322 detected_chargers = ab8500_charger_detect_chargers(di, false);
2323 if (detected_chargers < 0)
2324 return;
2325
2326 /*
2327 * Some chargers that breaks the USB spec is
2328 * identified as invalid by AB8500 and it refuse
2329 * to start the charging process. but by jumping
2330 * thru a few hoops it can be forced to start.
2331 */
2332 if (is_ab8500(di->parent))
2333 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2334 AB8500_USB_LINE_STAT_REG, &val);
2335 else
2336 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2337 AB8500_USB_LINK1_STAT_REG, &val);
2338
2339 if (ret >= 0)
2340 dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val);
2341 else
2342 dev_dbg(di->dev, "Error reading USB link status\n");
2343
2344 if (is_ab8500(di->parent))
2345 link_status = AB8500_USB_LINK_STATUS;
2346 else
2347 link_status = AB8505_USB_LINK_STATUS;
2348
2349 if (detected_chargers & USB_PW_CONN) {
2350 if (((val & link_status) >> USB_LINK_STATUS_SHIFT) ==
2351 USB_STAT_NOT_VALID_LINK &&
2352 di->invalid_charger_detect_state == 0) {
2353 dev_dbg(di->dev,
2354 "Invalid charger detected, state= 0\n");
2355 /*Enable charger*/
2356 abx500_mask_and_set_register_interruptible(di->dev,
2357 AB8500_CHARGER, AB8500_USBCH_CTRL1_REG,
2358 USB_CH_ENA, USB_CH_ENA);
2359 /*Enable charger detection*/
2360 abx500_mask_and_set_register_interruptible(di->dev,
2361 AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2362 USB_CH_DET, USB_CH_DET);
2363 di->invalid_charger_detect_state = 1;
2364 /*exit and wait for new link status interrupt.*/
2365 return;
2366
2367 }
2368 if (di->invalid_charger_detect_state == 1) {
2369 dev_dbg(di->dev,
2370 "Invalid charger detected, state= 1\n");
2371 /*Stop charger detection*/
2372 abx500_mask_and_set_register_interruptible(di->dev,
2373 AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2374 USB_CH_DET, 0x00);
2375 /*Check link status*/
2376 if (is_ab8500(di->parent))
2377 ret = abx500_get_register_interruptible(di->dev,
2378 AB8500_USB, AB8500_USB_LINE_STAT_REG,
2379 &val);
2380 else
2381 ret = abx500_get_register_interruptible(di->dev,
2382 AB8500_USB, AB8500_USB_LINK1_STAT_REG,
2383 &val);
2384
2385 dev_dbg(di->dev, "USB link status= 0x%02x\n",
2386 (val & link_status) >> USB_LINK_STATUS_SHIFT);
2387 di->invalid_charger_detect_state = 2;
2388 }
2389 } else {
2390 di->invalid_charger_detect_state = 0;
2391 }
2392
2393 if (!(detected_chargers & USB_PW_CONN)) {
2394 di->vbus_detected = false;
2395 ab8500_charger_set_usb_connected(di, false);
2396 ab8500_power_supply_changed(di, di->usb_chg.psy);
2397 return;
2398 }
2399
2400 dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__);
2401 di->vbus_detected = true;
2402 ret = ab8500_charger_read_usb_type(di);
2403 if (ret) {
2404 if (ret == -ENXIO) {
2405 /* No valid charger type detected */
2406 ab8500_charger_set_usb_connected(di, false);
2407 ab8500_power_supply_changed(di, di->usb_chg.psy);
2408 }
2409 return;
2410 }
2411
2412 if (di->usb_device_is_unrecognised) {
2413 dev_dbg(di->dev,
2414 "Potential Legacy Charger device. "
2415 "Delay work for %d msec for USB enum "
2416 "to finish",
2417 WAIT_ACA_RID_ENUMERATION);
2418 queue_delayed_work(di->charger_wq,
2419 &di->attach_work,
2420 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2421 } else if (di->is_aca_rid == 1) {
2422 /* Only wait once */
2423 di->is_aca_rid++;
2424 dev_dbg(di->dev,
2425 "%s Wait %d msec for USB enum to finish",
2426 __func__, WAIT_ACA_RID_ENUMERATION);
2427 queue_delayed_work(di->charger_wq,
2428 &di->attach_work,
2429 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2430 } else {
2431 queue_delayed_work(di->charger_wq,
2432 &di->attach_work,
2433 0);
2434 }
2435 }
2436
2437 static void ab8500_charger_usb_state_changed_work(struct work_struct *work)
2438 {
2439 int ret;
2440 unsigned long flags;
2441
2442 struct ab8500_charger *di = container_of(work,
2443 struct ab8500_charger, usb_state_changed_work.work);
2444
2445 if (!di->vbus_detected) {
2446 dev_dbg(di->dev,
2447 "%s !di->vbus_detected\n",
2448 __func__);
2449 return;
2450 }
2451
2452 spin_lock_irqsave(&di->usb_state.usb_lock, flags);
2453 di->usb_state.state = di->usb_state.state_tmp;
2454 di->usb_state.usb_current = di->usb_state.usb_current_tmp;
2455 spin_unlock_irqrestore(&di->usb_state.usb_lock, flags);
2456
2457 dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n",
2458 __func__, di->usb_state.state, di->usb_state.usb_current);
2459
2460 switch (di->usb_state.state) {
2461 case AB8500_BM_USB_STATE_RESET_HS:
2462 case AB8500_BM_USB_STATE_RESET_FS:
2463 case AB8500_BM_USB_STATE_SUSPEND:
2464 case AB8500_BM_USB_STATE_MAX:
2465 ab8500_charger_set_usb_connected(di, false);
2466 ab8500_power_supply_changed(di, di->usb_chg.psy);
2467 break;
2468
2469 case AB8500_BM_USB_STATE_RESUME:
2470 /*
2471 * when suspend->resume there should be delay
2472 * of 1sec for enabling charging
2473 */
2474 msleep(1000);
2475 /* Intentional fall through */
2476 case AB8500_BM_USB_STATE_CONFIGURED:
2477 /*
2478 * USB is configured, enable charging with the charging
2479 * input current obtained from USB driver
2480 */
2481 if (!ab8500_charger_get_usb_cur(di)) {
2482 /* Update maximum input current */
2483 ret = ab8500_charger_set_vbus_in_curr(di,
2484 di->max_usb_in_curr.usb_type_max);
2485 if (ret)
2486 return;
2487
2488 ab8500_charger_set_usb_connected(di, true);
2489 ab8500_power_supply_changed(di, di->usb_chg.psy);
2490 }
2491 break;
2492
2493 default:
2494 break;
2495 };
2496 }
2497
2498 /**
2499 * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status
2500 * @work: pointer to the work_struct structure
2501 *
2502 * Work queue function for checking the USB charger Not OK status
2503 */
2504 static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work)
2505 {
2506 int ret;
2507 u8 reg_value;
2508 bool prev_status;
2509
2510 struct ab8500_charger *di = container_of(work,
2511 struct ab8500_charger, check_usbchgnotok_work.work);
2512
2513 /* Check if the status bit for usbchargernotok is still active */
2514 ret = abx500_get_register_interruptible(di->dev,
2515 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
2516 if (ret < 0) {
2517 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2518 return;
2519 }
2520 prev_status = di->flags.usbchargernotok;
2521
2522 if (reg_value & VBUS_CH_NOK) {
2523 di->flags.usbchargernotok = true;
2524 /* Check again in 1sec */
2525 queue_delayed_work(di->charger_wq,
2526 &di->check_usbchgnotok_work, HZ);
2527 } else {
2528 di->flags.usbchargernotok = false;
2529 di->flags.vbus_collapse = false;
2530 }
2531
2532 if (prev_status != di->flags.usbchargernotok)
2533 ab8500_power_supply_changed(di, di->usb_chg.psy);
2534 }
2535
2536 /**
2537 * ab8500_charger_check_main_thermal_prot_work() - check main thermal status
2538 * @work: pointer to the work_struct structure
2539 *
2540 * Work queue function for checking the Main thermal prot status
2541 */
2542 static void ab8500_charger_check_main_thermal_prot_work(
2543 struct work_struct *work)
2544 {
2545 int ret;
2546 u8 reg_value;
2547
2548 struct ab8500_charger *di = container_of(work,
2549 struct ab8500_charger, check_main_thermal_prot_work);
2550
2551 /* Check if the status bit for main_thermal_prot is still active */
2552 ret = abx500_get_register_interruptible(di->dev,
2553 AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
2554 if (ret < 0) {
2555 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2556 return;
2557 }
2558 if (reg_value & MAIN_CH_TH_PROT)
2559 di->flags.main_thermal_prot = true;
2560 else
2561 di->flags.main_thermal_prot = false;
2562
2563 ab8500_power_supply_changed(di, di->ac_chg.psy);
2564 }
2565
2566 /**
2567 * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status
2568 * @work: pointer to the work_struct structure
2569 *
2570 * Work queue function for checking the USB thermal prot status
2571 */
2572 static void ab8500_charger_check_usb_thermal_prot_work(
2573 struct work_struct *work)
2574 {
2575 int ret;
2576 u8 reg_value;
2577
2578 struct ab8500_charger *di = container_of(work,
2579 struct ab8500_charger, check_usb_thermal_prot_work);
2580
2581 /* Check if the status bit for usb_thermal_prot is still active */
2582 ret = abx500_get_register_interruptible(di->dev,
2583 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
2584 if (ret < 0) {
2585 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2586 return;
2587 }
2588 if (reg_value & USB_CH_TH_PROT)
2589 di->flags.usb_thermal_prot = true;
2590 else
2591 di->flags.usb_thermal_prot = false;
2592
2593 ab8500_power_supply_changed(di, di->usb_chg.psy);
2594 }
2595
2596 /**
2597 * ab8500_charger_mainchunplugdet_handler() - main charger unplugged
2598 * @irq: interrupt number
2599 * @_di: pointer to the ab8500_charger structure
2600 *
2601 * Returns IRQ status(IRQ_HANDLED)
2602 */
2603 static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di)
2604 {
2605 struct ab8500_charger *di = _di;
2606
2607 dev_dbg(di->dev, "Main charger unplugged\n");
2608 queue_work(di->charger_wq, &di->ac_work);
2609
2610 cancel_delayed_work_sync(&di->ac_charger_attached_work);
2611 mutex_lock(&di->charger_attached_mutex);
2612 mutex_unlock(&di->charger_attached_mutex);
2613
2614 return IRQ_HANDLED;
2615 }
2616
2617 /**
2618 * ab8500_charger_mainchplugdet_handler() - main charger plugged
2619 * @irq: interrupt number
2620 * @_di: pointer to the ab8500_charger structure
2621 *
2622 * Returns IRQ status(IRQ_HANDLED)
2623 */
2624 static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di)
2625 {
2626 struct ab8500_charger *di = _di;
2627
2628 dev_dbg(di->dev, "Main charger plugged\n");
2629 queue_work(di->charger_wq, &di->ac_work);
2630
2631 mutex_lock(&di->charger_attached_mutex);
2632 mutex_unlock(&di->charger_attached_mutex);
2633
2634 if (is_ab8500(di->parent))
2635 queue_delayed_work(di->charger_wq,
2636 &di->ac_charger_attached_work,
2637 HZ);
2638 return IRQ_HANDLED;
2639 }
2640
2641 /**
2642 * ab8500_charger_mainextchnotok_handler() - main charger not ok
2643 * @irq: interrupt number
2644 * @_di: pointer to the ab8500_charger structure
2645 *
2646 * Returns IRQ status(IRQ_HANDLED)
2647 */
2648 static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di)
2649 {
2650 struct ab8500_charger *di = _di;
2651
2652 dev_dbg(di->dev, "Main charger not ok\n");
2653 di->flags.mainextchnotok = true;
2654 ab8500_power_supply_changed(di, di->ac_chg.psy);
2655
2656 /* Schedule a new HW failure check */
2657 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2658
2659 return IRQ_HANDLED;
2660 }
2661
2662 /**
2663 * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger
2664 * thermal protection threshold
2665 * @irq: interrupt number
2666 * @_di: pointer to the ab8500_charger structure
2667 *
2668 * Returns IRQ status(IRQ_HANDLED)
2669 */
2670 static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di)
2671 {
2672 struct ab8500_charger *di = _di;
2673
2674 dev_dbg(di->dev,
2675 "Die temp above Main charger thermal protection threshold\n");
2676 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2677
2678 return IRQ_HANDLED;
2679 }
2680
2681 /**
2682 * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger
2683 * thermal protection threshold
2684 * @irq: interrupt number
2685 * @_di: pointer to the ab8500_charger structure
2686 *
2687 * Returns IRQ status(IRQ_HANDLED)
2688 */
2689 static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di)
2690 {
2691 struct ab8500_charger *di = _di;
2692
2693 dev_dbg(di->dev,
2694 "Die temp ok for Main charger thermal protection threshold\n");
2695 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2696
2697 return IRQ_HANDLED;
2698 }
2699
2700 static void ab8500_charger_vbus_drop_end_work(struct work_struct *work)
2701 {
2702 struct ab8500_charger *di = container_of(work,
2703 struct ab8500_charger, vbus_drop_end_work.work);
2704 int ret, curr;
2705 u8 reg_value;
2706
2707 di->flags.vbus_drop_end = false;
2708
2709 /* Reset the drop counter */
2710 abx500_set_register_interruptible(di->dev,
2711 AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01);
2712
2713 if (is_ab8540(di->parent))
2714 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
2715 AB8540_CH_USBCH_STAT3_REG, &reg_value);
2716 else
2717 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
2718 AB8500_CH_USBCH_STAT2_REG, &reg_value);
2719 if (ret < 0) {
2720 dev_err(di->dev, "%s read failed\n", __func__);
2721 return;
2722 }
2723
2724 if (is_ab8540(di->parent))
2725 curr = di->bm->chg_input_curr[
2726 reg_value & AB8540_AUTO_VBUS_IN_CURR_MASK];
2727 else
2728 curr = di->bm->chg_input_curr[
2729 reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT];
2730
2731 if (di->max_usb_in_curr.calculated_max != curr) {
2732 /* USB source is collapsing */
2733 di->max_usb_in_curr.calculated_max = curr;
2734 dev_dbg(di->dev,
2735 "VBUS input current limiting to %d mA\n",
2736 di->max_usb_in_curr.calculated_max);
2737 } else {
2738 /*
2739 * USB source can not give more than this amount.
2740 * Taking more will collapse the source.
2741 */
2742 di->max_usb_in_curr.set_max =
2743 di->max_usb_in_curr.calculated_max;
2744 dev_dbg(di->dev,
2745 "VBUS input current limited to %d mA\n",
2746 di->max_usb_in_curr.set_max);
2747 }
2748
2749 if (di->usb.charger_connected)
2750 ab8500_charger_set_vbus_in_curr(di,
2751 di->max_usb_in_curr.usb_type_max);
2752 }
2753
2754 /**
2755 * ab8500_charger_vbusdetf_handler() - VBUS falling detected
2756 * @irq: interrupt number
2757 * @_di: pointer to the ab8500_charger structure
2758 *
2759 * Returns IRQ status(IRQ_HANDLED)
2760 */
2761 static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di)
2762 {
2763 struct ab8500_charger *di = _di;
2764
2765 di->vbus_detected = false;
2766 dev_dbg(di->dev, "VBUS falling detected\n");
2767 queue_work(di->charger_wq, &di->detect_usb_type_work);
2768
2769 return IRQ_HANDLED;
2770 }
2771
2772 /**
2773 * ab8500_charger_vbusdetr_handler() - VBUS rising detected
2774 * @irq: interrupt number
2775 * @_di: pointer to the ab8500_charger structure
2776 *
2777 * Returns IRQ status(IRQ_HANDLED)
2778 */
2779 static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di)
2780 {
2781 struct ab8500_charger *di = _di;
2782
2783 di->vbus_detected = true;
2784 dev_dbg(di->dev, "VBUS rising detected\n");
2785
2786 queue_work(di->charger_wq, &di->detect_usb_type_work);
2787
2788 return IRQ_HANDLED;
2789 }
2790
2791 /**
2792 * ab8500_charger_usblinkstatus_handler() - USB link status has changed
2793 * @irq: interrupt number
2794 * @_di: pointer to the ab8500_charger structure
2795 *
2796 * Returns IRQ status(IRQ_HANDLED)
2797 */
2798 static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di)
2799 {
2800 struct ab8500_charger *di = _di;
2801
2802 dev_dbg(di->dev, "USB link status changed\n");
2803
2804 queue_work(di->charger_wq, &di->usb_link_status_work);
2805
2806 return IRQ_HANDLED;
2807 }
2808
2809 /**
2810 * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger
2811 * thermal protection threshold
2812 * @irq: interrupt number
2813 * @_di: pointer to the ab8500_charger structure
2814 *
2815 * Returns IRQ status(IRQ_HANDLED)
2816 */
2817 static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di)
2818 {
2819 struct ab8500_charger *di = _di;
2820
2821 dev_dbg(di->dev,
2822 "Die temp above USB charger thermal protection threshold\n");
2823 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2824
2825 return IRQ_HANDLED;
2826 }
2827
2828 /**
2829 * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger
2830 * thermal protection threshold
2831 * @irq: interrupt number
2832 * @_di: pointer to the ab8500_charger structure
2833 *
2834 * Returns IRQ status(IRQ_HANDLED)
2835 */
2836 static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di)
2837 {
2838 struct ab8500_charger *di = _di;
2839
2840 dev_dbg(di->dev,
2841 "Die temp ok for USB charger thermal protection threshold\n");
2842 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2843
2844 return IRQ_HANDLED;
2845 }
2846
2847 /**
2848 * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected
2849 * @irq: interrupt number
2850 * @_di: pointer to the ab8500_charger structure
2851 *
2852 * Returns IRQ status(IRQ_HANDLED)
2853 */
2854 static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di)
2855 {
2856 struct ab8500_charger *di = _di;
2857
2858 dev_dbg(di->dev, "Not allowed USB charger detected\n");
2859 queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0);
2860
2861 return IRQ_HANDLED;
2862 }
2863
2864 /**
2865 * ab8500_charger_chwdexp_handler() - Charger watchdog expired
2866 * @irq: interrupt number
2867 * @_di: pointer to the ab8500_charger structure
2868 *
2869 * Returns IRQ status(IRQ_HANDLED)
2870 */
2871 static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di)
2872 {
2873 struct ab8500_charger *di = _di;
2874
2875 dev_dbg(di->dev, "Charger watchdog expired\n");
2876
2877 /*
2878 * The charger that was online when the watchdog expired
2879 * needs to be restarted for charging to start again
2880 */
2881 if (di->ac.charger_online) {
2882 di->ac.wd_expired = true;
2883 ab8500_power_supply_changed(di, di->ac_chg.psy);
2884 }
2885 if (di->usb.charger_online) {
2886 di->usb.wd_expired = true;
2887 ab8500_power_supply_changed(di, di->usb_chg.psy);
2888 }
2889
2890 return IRQ_HANDLED;
2891 }
2892
2893 /**
2894 * ab8500_charger_vbuschdropend_handler() - VBUS drop removed
2895 * @irq: interrupt number
2896 * @_di: pointer to the ab8500_charger structure
2897 *
2898 * Returns IRQ status(IRQ_HANDLED)
2899 */
2900 static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di)
2901 {
2902 struct ab8500_charger *di = _di;
2903
2904 dev_dbg(di->dev, "VBUS charger drop ended\n");
2905 di->flags.vbus_drop_end = true;
2906
2907 /*
2908 * VBUS might have dropped due to bad connection.
2909 * Schedule a new input limit set to the value SW requests.
2910 */
2911 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work,
2912 round_jiffies(VBUS_IN_CURR_LIM_RETRY_SET_TIME * HZ));
2913
2914 return IRQ_HANDLED;
2915 }
2916
2917 /**
2918 * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected
2919 * @irq: interrupt number
2920 * @_di: pointer to the ab8500_charger structure
2921 *
2922 * Returns IRQ status(IRQ_HANDLED)
2923 */
2924 static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di)
2925 {
2926 struct ab8500_charger *di = _di;
2927
2928 dev_dbg(di->dev, "VBUS overvoltage detected\n");
2929 di->flags.vbus_ovv = true;
2930 ab8500_power_supply_changed(di, di->usb_chg.psy);
2931
2932 /* Schedule a new HW failure check */
2933 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2934
2935 return IRQ_HANDLED;
2936 }
2937
2938 /**
2939 * ab8500_charger_ac_get_property() - get the ac/mains properties
2940 * @psy: pointer to the power_supply structure
2941 * @psp: pointer to the power_supply_property structure
2942 * @val: pointer to the power_supply_propval union
2943 *
2944 * This function gets called when an application tries to get the ac/mains
2945 * properties by reading the sysfs files.
2946 * AC/Mains properties are online, present and voltage.
2947 * online: ac/mains charging is in progress or not
2948 * present: presence of the ac/mains
2949 * voltage: AC/Mains voltage
2950 * Returns error code in case of failure else 0(on success)
2951 */
2952 static int ab8500_charger_ac_get_property(struct power_supply *psy,
2953 enum power_supply_property psp,
2954 union power_supply_propval *val)
2955 {
2956 struct ab8500_charger *di;
2957 int ret;
2958
2959 di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy));
2960
2961 switch (psp) {
2962 case POWER_SUPPLY_PROP_HEALTH:
2963 if (di->flags.mainextchnotok)
2964 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2965 else if (di->ac.wd_expired || di->usb.wd_expired)
2966 val->intval = POWER_SUPPLY_HEALTH_DEAD;
2967 else if (di->flags.main_thermal_prot)
2968 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2969 else
2970 val->intval = POWER_SUPPLY_HEALTH_GOOD;
2971 break;
2972 case POWER_SUPPLY_PROP_ONLINE:
2973 val->intval = di->ac.charger_online;
2974 break;
2975 case POWER_SUPPLY_PROP_PRESENT:
2976 val->intval = di->ac.charger_connected;
2977 break;
2978 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2979 ret = ab8500_charger_get_ac_voltage(di);
2980 if (ret >= 0)
2981 di->ac.charger_voltage = ret;
2982 /* On error, use previous value */
2983 val->intval = di->ac.charger_voltage * 1000;
2984 break;
2985 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2986 /*
2987 * This property is used to indicate when CV mode is entered
2988 * for the AC charger
2989 */
2990 di->ac.cv_active = ab8500_charger_ac_cv(di);
2991 val->intval = di->ac.cv_active;
2992 break;
2993 case POWER_SUPPLY_PROP_CURRENT_NOW:
2994 ret = ab8500_charger_get_ac_current(di);
2995 if (ret >= 0)
2996 di->ac.charger_current = ret;
2997 val->intval = di->ac.charger_current * 1000;
2998 break;
2999 default:
3000 return -EINVAL;
3001 }
3002 return 0;
3003 }
3004
3005 /**
3006 * ab8500_charger_usb_get_property() - get the usb properties
3007 * @psy: pointer to the power_supply structure
3008 * @psp: pointer to the power_supply_property structure
3009 * @val: pointer to the power_supply_propval union
3010 *
3011 * This function gets called when an application tries to get the usb
3012 * properties by reading the sysfs files.
3013 * USB properties are online, present and voltage.
3014 * online: usb charging is in progress or not
3015 * present: presence of the usb
3016 * voltage: vbus voltage
3017 * Returns error code in case of failure else 0(on success)
3018 */
3019 static int ab8500_charger_usb_get_property(struct power_supply *psy,
3020 enum power_supply_property psp,
3021 union power_supply_propval *val)
3022 {
3023 struct ab8500_charger *di;
3024 int ret;
3025
3026 di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy));
3027
3028 switch (psp) {
3029 case POWER_SUPPLY_PROP_HEALTH:
3030 if (di->flags.usbchargernotok)
3031 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
3032 else if (di->ac.wd_expired || di->usb.wd_expired)
3033 val->intval = POWER_SUPPLY_HEALTH_DEAD;
3034 else if (di->flags.usb_thermal_prot)
3035 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
3036 else if (di->flags.vbus_ovv)
3037 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
3038 else
3039 val->intval = POWER_SUPPLY_HEALTH_GOOD;
3040 break;
3041 case POWER_SUPPLY_PROP_ONLINE:
3042 val->intval = di->usb.charger_online;
3043 break;
3044 case POWER_SUPPLY_PROP_PRESENT:
3045 val->intval = di->usb.charger_connected;
3046 break;
3047 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
3048 ret = ab8500_charger_get_vbus_voltage(di);
3049 if (ret >= 0)
3050 di->usb.charger_voltage = ret;
3051 val->intval = di->usb.charger_voltage * 1000;
3052 break;
3053 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
3054 /*
3055 * This property is used to indicate when CV mode is entered
3056 * for the USB charger
3057 */
3058 di->usb.cv_active = ab8500_charger_usb_cv(di);
3059 val->intval = di->usb.cv_active;
3060 break;
3061 case POWER_SUPPLY_PROP_CURRENT_NOW:
3062 ret = ab8500_charger_get_usb_current(di);
3063 if (ret >= 0)
3064 di->usb.charger_current = ret;
3065 val->intval = di->usb.charger_current * 1000;
3066 break;
3067 case POWER_SUPPLY_PROP_CURRENT_AVG:
3068 /*
3069 * This property is used to indicate when VBUS has collapsed
3070 * due to too high output current from the USB charger
3071 */
3072 if (di->flags.vbus_collapse)
3073 val->intval = 1;
3074 else
3075 val->intval = 0;
3076 break;
3077 default:
3078 return -EINVAL;
3079 }
3080 return 0;
3081 }
3082
3083 /**
3084 * ab8500_charger_init_hw_registers() - Set up charger related registers
3085 * @di: pointer to the ab8500_charger structure
3086 *
3087 * Set up charger OVV, watchdog and maximum voltage registers as well as
3088 * charging of the backup battery
3089 */
3090 static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
3091 {
3092 int ret = 0;
3093 u8 bup_vch_range = 0, vbup33_vrtcn = 0;
3094
3095 /* Setup maximum charger current and voltage for ABB cut2.0 */
3096 if (!is_ab8500_1p1_or_earlier(di->parent)) {
3097 ret = abx500_set_register_interruptible(di->dev,
3098 AB8500_CHARGER,
3099 AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6);
3100 if (ret) {
3101 dev_err(di->dev,
3102 "failed to set CH_VOLT_LVL_MAX_REG\n");
3103 goto out;
3104 }
3105
3106 if (is_ab8540(di->parent))
3107 ret = abx500_set_register_interruptible(di->dev,
3108 AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
3109 CH_OP_CUR_LVL_2P);
3110 else
3111 ret = abx500_set_register_interruptible(di->dev,
3112 AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
3113 CH_OP_CUR_LVL_1P6);
3114 if (ret) {
3115 dev_err(di->dev,
3116 "failed to set CH_OPT_CRNTLVL_MAX_REG\n");
3117 goto out;
3118 }
3119 }
3120
3121 if (is_ab9540_2p0(di->parent) || is_ab9540_3p0(di->parent)
3122 || is_ab8505_2p0(di->parent) || is_ab8540(di->parent))
3123 ret = abx500_mask_and_set_register_interruptible(di->dev,
3124 AB8500_CHARGER,
3125 AB8500_USBCH_CTRL2_REG,
3126 VBUS_AUTO_IN_CURR_LIM_ENA,
3127 VBUS_AUTO_IN_CURR_LIM_ENA);
3128 else
3129 /*
3130 * VBUS OVV set to 6.3V and enable automatic current limitation
3131 */
3132 ret = abx500_set_register_interruptible(di->dev,
3133 AB8500_CHARGER,
3134 AB8500_USBCH_CTRL2_REG,
3135 VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA);
3136 if (ret) {
3137 dev_err(di->dev,
3138 "failed to set automatic current limitation\n");
3139 goto out;
3140 }
3141
3142 /* Enable main watchdog in OTP */
3143 ret = abx500_set_register_interruptible(di->dev,
3144 AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD);
3145 if (ret) {
3146 dev_err(di->dev, "failed to enable main WD in OTP\n");
3147 goto out;
3148 }
3149
3150 /* Enable main watchdog */
3151 ret = abx500_set_register_interruptible(di->dev,
3152 AB8500_SYS_CTRL2_BLOCK,
3153 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA);
3154 if (ret) {
3155 dev_err(di->dev, "faile to enable main watchdog\n");
3156 goto out;
3157 }
3158
3159 /*
3160 * Due to internal synchronisation, Enable and Kick watchdog bits
3161 * cannot be enabled in a single write.
3162 * A minimum delay of 2*32 kHz period (62.5µs) must be inserted
3163 * between writing Enable then Kick bits.
3164 */
3165 udelay(63);
3166
3167 /* Kick main watchdog */
3168 ret = abx500_set_register_interruptible(di->dev,
3169 AB8500_SYS_CTRL2_BLOCK,
3170 AB8500_MAIN_WDOG_CTRL_REG,
3171 (MAIN_WDOG_ENA | MAIN_WDOG_KICK));
3172 if (ret) {
3173 dev_err(di->dev, "failed to kick main watchdog\n");
3174 goto out;
3175 }
3176
3177 /* Disable main watchdog */
3178 ret = abx500_set_register_interruptible(di->dev,
3179 AB8500_SYS_CTRL2_BLOCK,
3180 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS);
3181 if (ret) {
3182 dev_err(di->dev, "failed to disable main watchdog\n");
3183 goto out;
3184 }
3185
3186 /* Set watchdog timeout */
3187 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3188 AB8500_CH_WD_TIMER_REG, WD_TIMER);
3189 if (ret) {
3190 dev_err(di->dev, "failed to set charger watchdog timeout\n");
3191 goto out;
3192 }
3193
3194 ret = ab8500_charger_led_en(di, false);
3195 if (ret < 0) {
3196 dev_err(di->dev, "failed to disable LED\n");
3197 goto out;
3198 }
3199
3200 /* Backup battery voltage and current */
3201 if (di->bm->bkup_bat_v > BUP_VCH_SEL_3P1V)
3202 bup_vch_range = BUP_VCH_RANGE;
3203 if (di->bm->bkup_bat_v == BUP_VCH_SEL_3P3V)
3204 vbup33_vrtcn = VBUP33_VRTCN;
3205
3206 ret = abx500_set_register_interruptible(di->dev,
3207 AB8500_RTC,
3208 AB8500_RTC_BACKUP_CHG_REG,
3209 (di->bm->bkup_bat_v & 0x3) | di->bm->bkup_bat_i);
3210 if (ret) {
3211 dev_err(di->dev, "failed to setup backup battery charging\n");
3212 goto out;
3213 }
3214 if (is_ab8540(di->parent)) {
3215 ret = abx500_set_register_interruptible(di->dev,
3216 AB8500_RTC,
3217 AB8500_RTC_CTRL1_REG,
3218 bup_vch_range | vbup33_vrtcn);
3219 if (ret) {
3220 dev_err(di->dev,
3221 "failed to setup backup battery charging\n");
3222 goto out;
3223 }
3224 }
3225
3226 /* Enable backup battery charging */
3227 abx500_mask_and_set_register_interruptible(di->dev,
3228 AB8500_RTC, AB8500_RTC_CTRL_REG,
3229 RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
3230 if (ret < 0)
3231 dev_err(di->dev, "%s mask and set failed\n", __func__);
3232
3233 if (is_ab8540(di->parent)) {
3234 ret = abx500_mask_and_set_register_interruptible(di->dev,
3235 AB8500_CHARGER, AB8540_USB_PP_MODE_REG,
3236 BUS_VSYS_VOL_SELECT_MASK, BUS_VSYS_VOL_SELECT_3P6V);
3237 if (ret) {
3238 dev_err(di->dev,
3239 "failed to setup usb power path vsys voltage\n");
3240 goto out;
3241 }
3242 ret = abx500_mask_and_set_register_interruptible(di->dev,
3243 AB8500_CHARGER, AB8540_USB_PP_CHR_REG,
3244 BUS_PP_PRECHG_CURRENT_MASK, 0);
3245 if (ret) {
3246 dev_err(di->dev,
3247 "failed to setup usb power path prechage current\n");
3248 goto out;
3249 }
3250 }
3251
3252 out:
3253 return ret;
3254 }
3255
3256 /*
3257 * ab8500 charger driver interrupts and their respective isr
3258 */
3259 static struct ab8500_charger_interrupts ab8500_charger_irq[] = {
3260 {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler},
3261 {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler},
3262 {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler},
3263 {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler},
3264 {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler},
3265 {"VBUS_DET_F", ab8500_charger_vbusdetf_handler},
3266 {"VBUS_DET_R", ab8500_charger_vbusdetr_handler},
3267 {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler},
3268 {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler},
3269 {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler},
3270 {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler},
3271 {"VBUS_OVV", ab8500_charger_vbusovv_handler},
3272 {"CH_WD_EXP", ab8500_charger_chwdexp_handler},
3273 {"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler},
3274 };
3275
3276 static int ab8500_charger_usb_notifier_call(struct notifier_block *nb,
3277 unsigned long event, void *power)
3278 {
3279 struct ab8500_charger *di =
3280 container_of(nb, struct ab8500_charger, nb);
3281 enum ab8500_usb_state bm_usb_state;
3282 unsigned mA = *((unsigned *)power);
3283
3284 if (!di)
3285 return NOTIFY_DONE;
3286
3287 if (event != USB_EVENT_VBUS) {
3288 dev_dbg(di->dev, "not a standard host, returning\n");
3289 return NOTIFY_DONE;
3290 }
3291
3292 /* TODO: State is fabricate here. See if charger really needs USB
3293 * state or if mA is enough
3294 */
3295 if ((di->usb_state.usb_current == 2) && (mA > 2))
3296 bm_usb_state = AB8500_BM_USB_STATE_RESUME;
3297 else if (mA == 0)
3298 bm_usb_state = AB8500_BM_USB_STATE_RESET_HS;
3299 else if (mA == 2)
3300 bm_usb_state = AB8500_BM_USB_STATE_SUSPEND;
3301 else if (mA >= 8) /* 8, 100, 500 */
3302 bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED;
3303 else /* Should never occur */
3304 bm_usb_state = AB8500_BM_USB_STATE_RESET_FS;
3305
3306 dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n",
3307 __func__, bm_usb_state, mA);
3308
3309 spin_lock(&di->usb_state.usb_lock);
3310 di->usb_state.state_tmp = bm_usb_state;
3311 di->usb_state.usb_current_tmp = mA;
3312 spin_unlock(&di->usb_state.usb_lock);
3313
3314 /*
3315 * wait for some time until you get updates from the usb stack
3316 * and negotiations are completed
3317 */
3318 queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2);
3319
3320 return NOTIFY_OK;
3321 }
3322
3323 #if defined(CONFIG_PM)
3324 static int ab8500_charger_resume(struct platform_device *pdev)
3325 {
3326 int ret;
3327 struct ab8500_charger *di = platform_get_drvdata(pdev);
3328
3329 /*
3330 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3331 * logic. That means we have to continously kick the charger
3332 * watchdog even when no charger is connected. This is only
3333 * valid once the AC charger has been enabled. This is
3334 * a bug that is not handled by the algorithm and the
3335 * watchdog have to be kicked by the charger driver
3336 * when the AC charger is disabled
3337 */
3338 if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) {
3339 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3340 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
3341 if (ret)
3342 dev_err(di->dev, "Failed to kick WD!\n");
3343
3344 /* If not already pending start a new timer */
3345 queue_delayed_work(di->charger_wq, &di->kick_wd_work,
3346 round_jiffies(WD_KICK_INTERVAL));
3347 }
3348
3349 /* If we still have a HW failure, schedule a new check */
3350 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
3351 queue_delayed_work(di->charger_wq,
3352 &di->check_hw_failure_work, 0);
3353 }
3354
3355 if (di->flags.vbus_drop_end)
3356 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0);
3357
3358 return 0;
3359 }
3360
3361 static int ab8500_charger_suspend(struct platform_device *pdev,
3362 pm_message_t state)
3363 {
3364 struct ab8500_charger *di = platform_get_drvdata(pdev);
3365
3366 /* Cancel any pending jobs */
3367 cancel_delayed_work(&di->check_hw_failure_work);
3368 cancel_delayed_work(&di->vbus_drop_end_work);
3369
3370 flush_delayed_work(&di->attach_work);
3371 flush_delayed_work(&di->usb_charger_attached_work);
3372 flush_delayed_work(&di->ac_charger_attached_work);
3373 flush_delayed_work(&di->check_usbchgnotok_work);
3374 flush_delayed_work(&di->check_vbat_work);
3375 flush_delayed_work(&di->kick_wd_work);
3376
3377 flush_work(&di->usb_link_status_work);
3378 flush_work(&di->ac_work);
3379 flush_work(&di->detect_usb_type_work);
3380
3381 if (atomic_read(&di->current_stepping_sessions))
3382 return -EAGAIN;
3383
3384 return 0;
3385 }
3386 #else
3387 #define ab8500_charger_suspend NULL
3388 #define ab8500_charger_resume NULL
3389 #endif
3390
3391 static struct notifier_block charger_nb = {
3392 .notifier_call = ab8500_external_charger_prepare,
3393 };
3394
3395 static int ab8500_charger_remove(struct platform_device *pdev)
3396 {
3397 struct ab8500_charger *di = platform_get_drvdata(pdev);
3398 int i, irq, ret;
3399
3400 /* Disable AC charging */
3401 ab8500_charger_ac_en(&di->ac_chg, false, 0, 0);
3402
3403 /* Disable USB charging */
3404 ab8500_charger_usb_en(&di->usb_chg, false, 0, 0);
3405
3406 /* Disable interrupts */
3407 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
3408 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3409 free_irq(irq, di);
3410 }
3411
3412 /* Backup battery voltage and current disable */
3413 ret = abx500_mask_and_set_register_interruptible(di->dev,
3414 AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0);
3415 if (ret < 0)
3416 dev_err(di->dev, "%s mask and set failed\n", __func__);
3417
3418 usb_unregister_notifier(di->usb_phy, &di->nb);
3419 usb_put_phy(di->usb_phy);
3420
3421 /* Delete the work queue */
3422 destroy_workqueue(di->charger_wq);
3423
3424 /* Unregister external charger enable notifier */
3425 if (!di->ac_chg.enabled)
3426 blocking_notifier_chain_unregister(
3427 &charger_notifier_list, &charger_nb);
3428
3429 flush_scheduled_work();
3430 if (di->usb_chg.enabled)
3431 power_supply_unregister(di->usb_chg.psy);
3432
3433 if (di->ac_chg.enabled && !di->ac_chg.external)
3434 power_supply_unregister(di->ac_chg.psy);
3435
3436 return 0;
3437 }
3438
3439 static char *supply_interface[] = {
3440 "ab8500_chargalg",
3441 "ab8500_fg",
3442 "ab8500_btemp",
3443 };
3444
3445 static const struct power_supply_desc ab8500_ac_chg_desc = {
3446 .name = "ab8500_ac",
3447 .type = POWER_SUPPLY_TYPE_MAINS,
3448 .properties = ab8500_charger_ac_props,
3449 .num_properties = ARRAY_SIZE(ab8500_charger_ac_props),
3450 .get_property = ab8500_charger_ac_get_property,
3451 };
3452
3453 static const struct power_supply_desc ab8500_usb_chg_desc = {
3454 .name = "ab8500_usb",
3455 .type = POWER_SUPPLY_TYPE_USB,
3456 .properties = ab8500_charger_usb_props,
3457 .num_properties = ARRAY_SIZE(ab8500_charger_usb_props),
3458 .get_property = ab8500_charger_usb_get_property,
3459 };
3460
3461 static int ab8500_charger_probe(struct platform_device *pdev)
3462 {
3463 struct device_node *np = pdev->dev.of_node;
3464 struct abx500_bm_data *plat = pdev->dev.platform_data;
3465 struct power_supply_config ac_psy_cfg = {}, usb_psy_cfg = {};
3466 struct ab8500_charger *di;
3467 int irq, i, charger_status, ret = 0, ch_stat;
3468
3469 di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
3470 if (!di) {
3471 dev_err(&pdev->dev, "%s no mem for ab8500_charger\n", __func__);
3472 return -ENOMEM;
3473 }
3474
3475 if (!plat) {
3476 dev_err(&pdev->dev, "no battery management data supplied\n");
3477 return -EINVAL;
3478 }
3479 di->bm = plat;
3480
3481 if (np) {
3482 ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm);
3483 if (ret) {
3484 dev_err(&pdev->dev, "failed to get battery information\n");
3485 return ret;
3486 }
3487 di->autopower_cfg = of_property_read_bool(np, "autopower_cfg");
3488 } else
3489 di->autopower_cfg = false;
3490
3491 /* get parent data */
3492 di->dev = &pdev->dev;
3493 di->parent = dev_get_drvdata(pdev->dev.parent);
3494 di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
3495
3496 /* initialize lock */
3497 spin_lock_init(&di->usb_state.usb_lock);
3498 mutex_init(&di->usb_ipt_crnt_lock);
3499
3500 di->autopower = false;
3501 di->invalid_charger_detect_state = 0;
3502
3503 /* AC and USB supply config */
3504 ac_psy_cfg.supplied_to = supply_interface;
3505 ac_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
3506 ac_psy_cfg.drv_data = &di->ac_chg;
3507 usb_psy_cfg.supplied_to = supply_interface;
3508 usb_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
3509 usb_psy_cfg.drv_data = &di->usb_chg;
3510
3511 /* AC supply */
3512 /* ux500_charger sub-class */
3513 di->ac_chg.ops.enable = &ab8500_charger_ac_en;
3514 di->ac_chg.ops.check_enable = &ab8500_charger_ac_check_enable;
3515 di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3516 di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3517 di->ac_chg.max_out_volt = ab8500_charger_voltage_map[
3518 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3519 di->ac_chg.max_out_curr =
3520 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3521 di->ac_chg.wdt_refresh = CHG_WD_INTERVAL;
3522 di->ac_chg.enabled = di->bm->ac_enabled;
3523 di->ac_chg.external = false;
3524
3525 /*notifier for external charger enabling*/
3526 if (!di->ac_chg.enabled)
3527 blocking_notifier_chain_register(
3528 &charger_notifier_list, &charger_nb);
3529
3530 /* USB supply */
3531 /* ux500_charger sub-class */
3532 di->usb_chg.ops.enable = &ab8500_charger_usb_en;
3533 di->usb_chg.ops.check_enable = &ab8500_charger_usb_check_enable;
3534 di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3535 di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3536 di->usb_chg.ops.pp_enable = &ab8540_charger_power_path_enable;
3537 di->usb_chg.ops.pre_chg_enable = &ab8540_charger_usb_pre_chg_enable;
3538 di->usb_chg.max_out_volt = ab8500_charger_voltage_map[
3539 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3540 di->usb_chg.max_out_curr =
3541 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3542 di->usb_chg.wdt_refresh = CHG_WD_INTERVAL;
3543 di->usb_chg.enabled = di->bm->usb_enabled;
3544 di->usb_chg.external = false;
3545 di->usb_chg.power_path = di->bm->usb_power_path;
3546 di->usb_state.usb_current = -1;
3547
3548 /* Create a work queue for the charger */
3549 di->charger_wq =
3550 create_singlethread_workqueue("ab8500_charger_wq");
3551 if (di->charger_wq == NULL) {
3552 dev_err(di->dev, "failed to create work queue\n");
3553 return -ENOMEM;
3554 }
3555
3556 mutex_init(&di->charger_attached_mutex);
3557
3558 /* Init work for HW failure check */
3559 INIT_DEFERRABLE_WORK(&di->check_hw_failure_work,
3560 ab8500_charger_check_hw_failure_work);
3561 INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work,
3562 ab8500_charger_check_usbchargernotok_work);
3563
3564 INIT_DELAYED_WORK(&di->ac_charger_attached_work,
3565 ab8500_charger_ac_attached_work);
3566 INIT_DELAYED_WORK(&di->usb_charger_attached_work,
3567 ab8500_charger_usb_attached_work);
3568
3569 /*
3570 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3571 * logic. That means we have to continously kick the charger
3572 * watchdog even when no charger is connected. This is only
3573 * valid once the AC charger has been enabled. This is
3574 * a bug that is not handled by the algorithm and the
3575 * watchdog have to be kicked by the charger driver
3576 * when the AC charger is disabled
3577 */
3578 INIT_DEFERRABLE_WORK(&di->kick_wd_work,
3579 ab8500_charger_kick_watchdog_work);
3580
3581 INIT_DEFERRABLE_WORK(&di->check_vbat_work,
3582 ab8500_charger_check_vbat_work);
3583
3584 INIT_DELAYED_WORK(&di->attach_work,
3585 ab8500_charger_usb_link_attach_work);
3586
3587 INIT_DELAYED_WORK(&di->usb_state_changed_work,
3588 ab8500_charger_usb_state_changed_work);
3589
3590 INIT_DELAYED_WORK(&di->vbus_drop_end_work,
3591 ab8500_charger_vbus_drop_end_work);
3592
3593 /* Init work for charger detection */
3594 INIT_WORK(&di->usb_link_status_work,
3595 ab8500_charger_usb_link_status_work);
3596 INIT_WORK(&di->ac_work, ab8500_charger_ac_work);
3597 INIT_WORK(&di->detect_usb_type_work,
3598 ab8500_charger_detect_usb_type_work);
3599
3600 /* Init work for checking HW status */
3601 INIT_WORK(&di->check_main_thermal_prot_work,
3602 ab8500_charger_check_main_thermal_prot_work);
3603 INIT_WORK(&di->check_usb_thermal_prot_work,
3604 ab8500_charger_check_usb_thermal_prot_work);
3605
3606 /*
3607 * VDD ADC supply needs to be enabled from this driver when there
3608 * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
3609 * interrupts during charging
3610 */
3611 di->regu = devm_regulator_get(di->dev, "vddadc");
3612 if (IS_ERR(di->regu)) {
3613 ret = PTR_ERR(di->regu);
3614 dev_err(di->dev, "failed to get vddadc regulator\n");
3615 goto free_charger_wq;
3616 }
3617
3618
3619 /* Initialize OVV, and other registers */
3620 ret = ab8500_charger_init_hw_registers(di);
3621 if (ret) {
3622 dev_err(di->dev, "failed to initialize ABB registers\n");
3623 goto free_charger_wq;
3624 }
3625
3626 /* Register AC charger class */
3627 if (di->ac_chg.enabled) {
3628 di->ac_chg.psy = power_supply_register(di->dev,
3629 &ab8500_ac_chg_desc,
3630 &ac_psy_cfg);
3631 if (IS_ERR(di->ac_chg.psy)) {
3632 dev_err(di->dev, "failed to register AC charger\n");
3633 ret = PTR_ERR(di->ac_chg.psy);
3634 goto free_charger_wq;
3635 }
3636 }
3637
3638 /* Register USB charger class */
3639 if (di->usb_chg.enabled) {
3640 di->usb_chg.psy = power_supply_register(di->dev,
3641 &ab8500_usb_chg_desc,
3642 &usb_psy_cfg);
3643 if (IS_ERR(di->usb_chg.psy)) {
3644 dev_err(di->dev, "failed to register USB charger\n");
3645 ret = PTR_ERR(di->usb_chg.psy);
3646 goto free_ac;
3647 }
3648 }
3649
3650 di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
3651 if (IS_ERR_OR_NULL(di->usb_phy)) {
3652 dev_err(di->dev, "failed to get usb transceiver\n");
3653 ret = -EINVAL;
3654 goto free_usb;
3655 }
3656 di->nb.notifier_call = ab8500_charger_usb_notifier_call;
3657 ret = usb_register_notifier(di->usb_phy, &di->nb);
3658 if (ret) {
3659 dev_err(di->dev, "failed to register usb notifier\n");
3660 goto put_usb_phy;
3661 }
3662
3663 /* Identify the connected charger types during startup */
3664 charger_status = ab8500_charger_detect_chargers(di, true);
3665 if (charger_status & AC_PW_CONN) {
3666 di->ac.charger_connected = 1;
3667 di->ac_conn = true;
3668 ab8500_power_supply_changed(di, di->ac_chg.psy);
3669 sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
3670 }
3671
3672 if (charger_status & USB_PW_CONN) {
3673 di->vbus_detected = true;
3674 di->vbus_detected_start = true;
3675 queue_work(di->charger_wq,
3676 &di->detect_usb_type_work);
3677 }
3678
3679 /* Register interrupts */
3680 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
3681 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3682 ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr,
3683 IRQF_SHARED | IRQF_NO_SUSPEND,
3684 ab8500_charger_irq[i].name, di);
3685
3686 if (ret != 0) {
3687 dev_err(di->dev, "failed to request %s IRQ %d: %d\n"
3688 , ab8500_charger_irq[i].name, irq, ret);
3689 goto free_irq;
3690 }
3691 dev_dbg(di->dev, "Requested %s IRQ %d: %d\n",
3692 ab8500_charger_irq[i].name, irq, ret);
3693 }
3694
3695 platform_set_drvdata(pdev, di);
3696
3697 mutex_lock(&di->charger_attached_mutex);
3698
3699 ch_stat = ab8500_charger_detect_chargers(di, false);
3700
3701 if ((ch_stat & AC_PW_CONN) == AC_PW_CONN) {
3702 if (is_ab8500(di->parent))
3703 queue_delayed_work(di->charger_wq,
3704 &di->ac_charger_attached_work,
3705 HZ);
3706 }
3707 if ((ch_stat & USB_PW_CONN) == USB_PW_CONN) {
3708 if (is_ab8500(di->parent))
3709 queue_delayed_work(di->charger_wq,
3710 &di->usb_charger_attached_work,
3711 HZ);
3712 }
3713
3714 mutex_unlock(&di->charger_attached_mutex);
3715
3716 return ret;
3717
3718 free_irq:
3719 usb_unregister_notifier(di->usb_phy, &di->nb);
3720
3721 /* We also have to free all successfully registered irqs */
3722 for (i = i - 1; i >= 0; i--) {
3723 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3724 free_irq(irq, di);
3725 }
3726 put_usb_phy:
3727 usb_put_phy(di->usb_phy);
3728 free_usb:
3729 if (di->usb_chg.enabled)
3730 power_supply_unregister(di->usb_chg.psy);
3731 free_ac:
3732 if (di->ac_chg.enabled)
3733 power_supply_unregister(di->ac_chg.psy);
3734 free_charger_wq:
3735 destroy_workqueue(di->charger_wq);
3736 return ret;
3737 }
3738
3739 static const struct of_device_id ab8500_charger_match[] = {
3740 { .compatible = "stericsson,ab8500-charger", },
3741 { },
3742 };
3743
3744 static struct platform_driver ab8500_charger_driver = {
3745 .probe = ab8500_charger_probe,
3746 .remove = ab8500_charger_remove,
3747 .suspend = ab8500_charger_suspend,
3748 .resume = ab8500_charger_resume,
3749 .driver = {
3750 .name = "ab8500-charger",
3751 .of_match_table = ab8500_charger_match,
3752 },
3753 };
3754
3755 static int __init ab8500_charger_init(void)
3756 {
3757 return platform_driver_register(&ab8500_charger_driver);
3758 }
3759
3760 static void __exit ab8500_charger_exit(void)
3761 {
3762 platform_driver_unregister(&ab8500_charger_driver);
3763 }
3764
3765 subsys_initcall_sync(ab8500_charger_init);
3766 module_exit(ab8500_charger_exit);
3767
3768 MODULE_LICENSE("GPL v2");
3769 MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
3770 MODULE_ALIAS("platform:ab8500-charger");
3771 MODULE_DESCRIPTION("AB8500 charger management driver");
Linux with added FPC-III support