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cpufreq: rewrite cpufreq_driver->flags using shift operator
[linux-2.6/btrfs-unstable.git] / drivers / power / ab8500_charger.c
bloba4c4a10b3a41cd2e2e05d67773097cbfed686f8f
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 break;
770 case USB_STAT_CARKIT_1:
771 case USB_STAT_CARKIT_2:
772 case USB_STAT_ACA_DOCK_CHARGER:
773 case USB_STAT_CHARGER_LINE_1:
774 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
775 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
776 di->max_usb_in_curr.usb_type_max);
777 break;
778 case USB_STAT_NOT_VALID_LINK:
779 dev_err(di->dev, "USB Type invalid - try charging anyway\n");
780 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
781 break;
782
783 default:
784 dev_err(di->dev, "USB Type - Unknown\n");
785 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
786 ret = -ENXIO;
787 break;
788 };
789
790 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
791 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
792 link_status, di->max_usb_in_curr.set_max);
793
794 return ret;
795 }
796
797 /**
798 * ab8500_charger_read_usb_type() - read the type of usb connected
799 * @di: pointer to the ab8500_charger structure
800 *
801 * Detect the type of the plugged USB
802 * Returns error code in case of failure else 0 on success
803 */
804 static int ab8500_charger_read_usb_type(struct ab8500_charger *di)
805 {
806 int ret;
807 u8 val;
808
809 ret = abx500_get_register_interruptible(di->dev,
810 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val);
811 if (ret < 0) {
812 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
813 return ret;
814 }
815 if (is_ab8500(di->parent))
816 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
817 AB8500_USB_LINE_STAT_REG, &val);
818 else
819 ret = abx500_get_register_interruptible(di->dev,
820 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
821 if (ret < 0) {
822 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
823 return ret;
824 }
825
826 /* get the USB type */
827 if (is_ab8500(di->parent))
828 val = (val & AB8500_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
829 else
830 val = (val & AB8505_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
831 ret = ab8500_charger_max_usb_curr(di,
832 (enum ab8500_charger_link_status) val);
833
834 return ret;
835 }
836
837 /**
838 * ab8500_charger_detect_usb_type() - get the type of usb connected
839 * @di: pointer to the ab8500_charger structure
840 *
841 * Detect the type of the plugged USB
842 * Returns error code in case of failure else 0 on success
843 */
844 static int ab8500_charger_detect_usb_type(struct ab8500_charger *di)
845 {
846 int i, ret;
847 u8 val;
848
849 /*
850 * On getting the VBUS rising edge detect interrupt there
851 * is a 250ms delay after which the register UsbLineStatus
852 * is filled with valid data.
853 */
854 for (i = 0; i < 10; i++) {
855 msleep(250);
856 ret = abx500_get_register_interruptible(di->dev,
857 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG,
858 &val);
859 dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n",
860 __func__, val);
861 if (ret < 0) {
862 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
863 return ret;
864 }
865
866 if (is_ab8500(di->parent))
867 ret = abx500_get_register_interruptible(di->dev,
868 AB8500_USB, AB8500_USB_LINE_STAT_REG, &val);
869 else
870 ret = abx500_get_register_interruptible(di->dev,
871 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
872 if (ret < 0) {
873 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
874 return ret;
875 }
876 dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__,
877 val);
878 /*
879 * Until the IT source register is read the UsbLineStatus
880 * register is not updated, hence doing the same
881 * Revisit this:
882 */
883
884 /* get the USB type */
885 if (is_ab8500(di->parent))
886 val = (val & AB8500_USB_LINK_STATUS) >>
887 USB_LINK_STATUS_SHIFT;
888 else
889 val = (val & AB8505_USB_LINK_STATUS) >>
890 USB_LINK_STATUS_SHIFT;
891 if (val)
892 break;
893 }
894 ret = ab8500_charger_max_usb_curr(di,
895 (enum ab8500_charger_link_status) val);
896
897 return ret;
898 }
899
900 /*
901 * This array maps the raw hex value to charger voltage used by the AB8500
902 * Values taken from the UM0836
903 */
904 static int ab8500_charger_voltage_map[] = {
905 3500 ,
906 3525 ,
907 3550 ,
908 3575 ,
909 3600 ,
910 3625 ,
911 3650 ,
912 3675 ,
913 3700 ,
914 3725 ,
915 3750 ,
916 3775 ,
917 3800 ,
918 3825 ,
919 3850 ,
920 3875 ,
921 3900 ,
922 3925 ,
923 3950 ,
924 3975 ,
925 4000 ,
926 4025 ,
927 4050 ,
928 4060 ,
929 4070 ,
930 4080 ,
931 4090 ,
932 4100 ,
933 4110 ,
934 4120 ,
935 4130 ,
936 4140 ,
937 4150 ,
938 4160 ,
939 4170 ,
940 4180 ,
941 4190 ,
942 4200 ,
943 4210 ,
944 4220 ,
945 4230 ,
946 4240 ,
947 4250 ,
948 4260 ,
949 4270 ,
950 4280 ,
951 4290 ,
952 4300 ,
953 4310 ,
954 4320 ,
955 4330 ,
956 4340 ,
957 4350 ,
958 4360 ,
959 4370 ,
960 4380 ,
961 4390 ,
962 4400 ,
963 4410 ,
964 4420 ,
965 4430 ,
966 4440 ,
967 4450 ,
968 4460 ,
969 4470 ,
970 4480 ,
971 4490 ,
972 4500 ,
973 4510 ,
974 4520 ,
975 4530 ,
976 4540 ,
977 4550 ,
978 4560 ,
979 4570 ,
980 4580 ,
981 4590 ,
982 4600 ,
983 };
984
985 static int ab8500_voltage_to_regval(int voltage)
986 {
987 int i;
988
989 /* Special case for voltage below 3.5V */
990 if (voltage < ab8500_charger_voltage_map[0])
991 return LOW_VOLT_REG;
992
993 for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) {
994 if (voltage < ab8500_charger_voltage_map[i])
995 return i - 1;
996 }
997
998 /* If not last element, return error */
999 i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1;
1000 if (voltage == ab8500_charger_voltage_map[i])
1001 return i;
1002 else
1003 return -1;
1004 }
1005
1006 static int ab8500_current_to_regval(struct ab8500_charger *di, int curr)
1007 {
1008 int i;
1009
1010 if (curr < di->bm->chg_output_curr[0])
1011 return 0;
1012
1013 for (i = 0; i < di->bm->n_chg_out_curr; i++) {
1014 if (curr < di->bm->chg_output_curr[i])
1015 return i - 1;
1016 }
1017
1018 /* If not last element, return error */
1019 i = di->bm->n_chg_out_curr - 1;
1020 if (curr == di->bm->chg_output_curr[i])
1021 return i;
1022 else
1023 return -1;
1024 }
1025
1026 static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr)
1027 {
1028 int i;
1029
1030 if (curr < di->bm->chg_input_curr[0])
1031 return 0;
1032
1033 for (i = 0; i < di->bm->n_chg_in_curr; i++) {
1034 if (curr < di->bm->chg_input_curr[i])
1035 return i - 1;
1036 }
1037
1038 /* If not last element, return error */
1039 i = di->bm->n_chg_in_curr - 1;
1040 if (curr == di->bm->chg_input_curr[i])
1041 return i;
1042 else
1043 return -1;
1044 }
1045
1046 /**
1047 * ab8500_charger_get_usb_cur() - get usb current
1048 * @di: pointer to the ab8500_charger structre
1049 *
1050 * The usb stack provides the maximum current that can be drawn from
1051 * the standard usb host. This will be in mA.
1052 * This function converts current in mA to a value that can be written
1053 * to the register. Returns -1 if charging is not allowed
1054 */
1055 static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
1056 {
1057 int ret = 0;
1058 switch (di->usb_state.usb_current) {
1059 case 100:
1060 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P09;
1061 break;
1062 case 200:
1063 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P19;
1064 break;
1065 case 300:
1066 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P29;
1067 break;
1068 case 400:
1069 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P38;
1070 break;
1071 case 500:
1072 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
1073 break;
1074 default:
1075 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
1076 ret = -EPERM;
1077 break;
1078 };
1079 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
1080 return ret;
1081 }
1082
1083 /**
1084 * ab8500_charger_check_continue_stepping() - Check to allow stepping
1085 * @di: pointer to the ab8500_charger structure
1086 * @reg: select what charger register to check
1087 *
1088 * Check if current stepping should be allowed to continue.
1089 * Checks if charger source has not collapsed. If it has, further stepping
1090 * is not allowed.
1091 */
1092 static bool ab8500_charger_check_continue_stepping(struct ab8500_charger *di,
1093 int reg)
1094 {
1095 if (reg == AB8500_USBCH_IPT_CRNTLVL_REG)
1096 return !di->flags.vbus_drop_end;
1097 else
1098 return true;
1099 }
1100
1101 /**
1102 * ab8500_charger_set_current() - set charger current
1103 * @di: pointer to the ab8500_charger structure
1104 * @ich: charger current, in mA
1105 * @reg: select what charger register to set
1106 *
1107 * Set charger current.
1108 * There is no state machine in the AB to step up/down the charger
1109 * current to avoid dips and spikes on MAIN, VBUS and VBAT when
1110 * charging is started. Instead we need to implement
1111 * this charger current step-up/down here.
1112 * Returns error code in case of failure else 0(on success)
1113 */
1114 static int ab8500_charger_set_current(struct ab8500_charger *di,
1115 int ich, int reg)
1116 {
1117 int ret = 0;
1118 int curr_index, prev_curr_index, shift_value, i;
1119 u8 reg_value;
1120 u32 step_udelay;
1121 bool no_stepping = false;
1122
1123 atomic_inc(&di->current_stepping_sessions);
1124
1125 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1126 reg, &reg_value);
1127 if (ret < 0) {
1128 dev_err(di->dev, "%s read failed\n", __func__);
1129 goto exit_set_current;
1130 }
1131
1132 switch (reg) {
1133 case AB8500_MCH_IPT_CURLVL_REG:
1134 shift_value = MAIN_CH_INPUT_CURR_SHIFT;
1135 prev_curr_index = (reg_value >> shift_value);
1136 curr_index = ab8500_current_to_regval(di, ich);
1137 step_udelay = STEP_UDELAY;
1138 if (!di->ac.charger_connected)
1139 no_stepping = true;
1140 break;
1141 case AB8500_USBCH_IPT_CRNTLVL_REG:
1142 if (is_ab8540(di->parent))
1143 shift_value = AB8540_VBUS_IN_CURR_LIM_SHIFT;
1144 else
1145 shift_value = VBUS_IN_CURR_LIM_SHIFT;
1146 prev_curr_index = (reg_value >> shift_value);
1147 curr_index = ab8500_vbus_in_curr_to_regval(di, ich);
1148 step_udelay = STEP_UDELAY * 100;
1149
1150 if (!di->usb.charger_connected)
1151 no_stepping = true;
1152 break;
1153 case AB8500_CH_OPT_CRNTLVL_REG:
1154 shift_value = 0;
1155 prev_curr_index = (reg_value >> shift_value);
1156 curr_index = ab8500_current_to_regval(di, ich);
1157 step_udelay = STEP_UDELAY;
1158 if (curr_index && (curr_index - prev_curr_index) > 1)
1159 step_udelay *= 100;
1160
1161 if (!di->usb.charger_connected && !di->ac.charger_connected)
1162 no_stepping = true;
1163
1164 break;
1165 default:
1166 dev_err(di->dev, "%s current register not valid\n", __func__);
1167 ret = -ENXIO;
1168 goto exit_set_current;
1169 }
1170
1171 if (curr_index < 0) {
1172 dev_err(di->dev, "requested current limit out-of-range\n");
1173 ret = -ENXIO;
1174 goto exit_set_current;
1175 }
1176
1177 /* only update current if it's been changed */
1178 if (prev_curr_index == curr_index) {
1179 dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n",
1180 __func__, reg);
1181 ret = 0;
1182 goto exit_set_current;
1183 }
1184
1185 dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n",
1186 __func__, ich, reg);
1187
1188 if (no_stepping) {
1189 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1190 reg, (u8)curr_index << shift_value);
1191 if (ret)
1192 dev_err(di->dev, "%s write failed\n", __func__);
1193 } else if (prev_curr_index > curr_index) {
1194 for (i = prev_curr_index - 1; i >= curr_index; i--) {
1195 dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n",
1196 (u8) i << shift_value, reg);
1197 ret = abx500_set_register_interruptible(di->dev,
1198 AB8500_CHARGER, reg, (u8)i << shift_value);
1199 if (ret) {
1200 dev_err(di->dev, "%s write failed\n", __func__);
1201 goto exit_set_current;
1202 }
1203 if (i != curr_index)
1204 usleep_range(step_udelay, step_udelay * 2);
1205 }
1206 } else {
1207 bool allow = true;
1208 for (i = prev_curr_index + 1; i <= curr_index && allow; i++) {
1209 dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n",
1210 (u8)i << shift_value, reg);
1211 ret = abx500_set_register_interruptible(di->dev,
1212 AB8500_CHARGER, reg, (u8)i << shift_value);
1213 if (ret) {
1214 dev_err(di->dev, "%s write failed\n", __func__);
1215 goto exit_set_current;
1216 }
1217 if (i != curr_index)
1218 usleep_range(step_udelay, step_udelay * 2);
1219
1220 allow = ab8500_charger_check_continue_stepping(di, reg);
1221 }
1222 }
1223
1224 exit_set_current:
1225 atomic_dec(&di->current_stepping_sessions);
1226
1227 return ret;
1228 }
1229
1230 /**
1231 * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
1232 * @di: pointer to the ab8500_charger structure
1233 * @ich_in: charger input current limit
1234 *
1235 * Sets the current that can be drawn from the USB host
1236 * Returns error code in case of failure else 0(on success)
1237 */
1238 static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
1239 int ich_in)
1240 {
1241 int min_value;
1242 int ret;
1243
1244 /* We should always use to lowest current limit */
1245 min_value = min(di->bm->chg_params->usb_curr_max, ich_in);
1246 if (di->max_usb_in_curr.set_max > 0)
1247 min_value = min(di->max_usb_in_curr.set_max, min_value);
1248
1249 if (di->usb_state.usb_current >= 0)
1250 min_value = min(di->usb_state.usb_current, min_value);
1251
1252 switch (min_value) {
1253 case 100:
1254 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1255 min_value = USB_CH_IP_CUR_LVL_0P05;
1256 break;
1257 case 500:
1258 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1259 min_value = USB_CH_IP_CUR_LVL_0P45;
1260 break;
1261 default:
1262 break;
1263 }
1264
1265 dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value);
1266
1267 mutex_lock(&di->usb_ipt_crnt_lock);
1268 ret = ab8500_charger_set_current(di, min_value,
1269 AB8500_USBCH_IPT_CRNTLVL_REG);
1270 mutex_unlock(&di->usb_ipt_crnt_lock);
1271
1272 return ret;
1273 }
1274
1275 /**
1276 * ab8500_charger_set_main_in_curr() - set main charger input current
1277 * @di: pointer to the ab8500_charger structure
1278 * @ich_in: input charger current, in mA
1279 *
1280 * Set main charger input current.
1281 * Returns error code in case of failure else 0(on success)
1282 */
1283 static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di,
1284 int ich_in)
1285 {
1286 return ab8500_charger_set_current(di, ich_in,
1287 AB8500_MCH_IPT_CURLVL_REG);
1288 }
1289
1290 /**
1291 * ab8500_charger_set_output_curr() - set charger output current
1292 * @di: pointer to the ab8500_charger structure
1293 * @ich_out: output charger current, in mA
1294 *
1295 * Set charger output current.
1296 * Returns error code in case of failure else 0(on success)
1297 */
1298 static int ab8500_charger_set_output_curr(struct ab8500_charger *di,
1299 int ich_out)
1300 {
1301 return ab8500_charger_set_current(di, ich_out,
1302 AB8500_CH_OPT_CRNTLVL_REG);
1303 }
1304
1305 /**
1306 * ab8500_charger_led_en() - turn on/off chargign led
1307 * @di: pointer to the ab8500_charger structure
1308 * @on: flag to turn on/off the chargign led
1309 *
1310 * Power ON/OFF charging LED indication
1311 * Returns error code in case of failure else 0(on success)
1312 */
1313 static int ab8500_charger_led_en(struct ab8500_charger *di, int on)
1314 {
1315 int ret;
1316
1317 if (on) {
1318 /* Power ON charging LED indicator, set LED current to 5mA */
1319 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1320 AB8500_LED_INDICATOR_PWM_CTRL,
1321 (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA));
1322 if (ret) {
1323 dev_err(di->dev, "Power ON LED failed\n");
1324 return ret;
1325 }
1326 /* LED indicator PWM duty cycle 252/256 */
1327 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1328 AB8500_LED_INDICATOR_PWM_DUTY,
1329 LED_INDICATOR_PWM_DUTY_252_256);
1330 if (ret) {
1331 dev_err(di->dev, "Set LED PWM duty cycle failed\n");
1332 return ret;
1333 }
1334 } else {
1335 /* Power off charging LED indicator */
1336 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1337 AB8500_LED_INDICATOR_PWM_CTRL,
1338 LED_INDICATOR_PWM_DIS);
1339 if (ret) {
1340 dev_err(di->dev, "Power-off LED failed\n");
1341 return ret;
1342 }
1343 }
1344
1345 return ret;
1346 }
1347
1348 /**
1349 * ab8500_charger_ac_en() - enable or disable ac charging
1350 * @di: pointer to the ab8500_charger structure
1351 * @enable: enable/disable flag
1352 * @vset: charging voltage
1353 * @iset: charging current
1354 *
1355 * Enable/Disable AC/Mains charging and turns on/off the charging led
1356 * respectively.
1357 **/
1358 static int ab8500_charger_ac_en(struct ux500_charger *charger,
1359 int enable, int vset, int iset)
1360 {
1361 int ret;
1362 int volt_index;
1363 int curr_index;
1364 int input_curr_index;
1365 u8 overshoot = 0;
1366
1367 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1368
1369 if (enable) {
1370 /* Check if AC is connected */
1371 if (!di->ac.charger_connected) {
1372 dev_err(di->dev, "AC charger not connected\n");
1373 return -ENXIO;
1374 }
1375
1376 /* Enable AC charging */
1377 dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset);
1378
1379 /*
1380 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1381 * will be triggered everytime we enable the VDD ADC supply.
1382 * This will turn off charging for a short while.
1383 * It can be avoided by having the supply on when
1384 * there is a charger enabled. Normally the VDD ADC supply
1385 * is enabled everytime a GPADC conversion is triggered. We will
1386 * force it to be enabled from this driver to have
1387 * the GPADC module independant of the AB8500 chargers
1388 */
1389 if (!di->vddadc_en_ac) {
1390 regulator_enable(di->regu);
1391 di->vddadc_en_ac = true;
1392 }
1393
1394 /* Check if the requested voltage or current is valid */
1395 volt_index = ab8500_voltage_to_regval(vset);
1396 curr_index = ab8500_current_to_regval(di, iset);
1397 input_curr_index = ab8500_current_to_regval(di,
1398 di->bm->chg_params->ac_curr_max);
1399 if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
1400 dev_err(di->dev,
1401 "Charger voltage or current too high, "
1402 "charging not started\n");
1403 return -ENXIO;
1404 }
1405
1406 /* ChVoltLevel: maximum battery charging voltage */
1407 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1408 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1409 if (ret) {
1410 dev_err(di->dev, "%s write failed\n", __func__);
1411 return ret;
1412 }
1413 /* MainChInputCurr: current that can be drawn from the charger*/
1414 ret = ab8500_charger_set_main_in_curr(di,
1415 di->bm->chg_params->ac_curr_max);
1416 if (ret) {
1417 dev_err(di->dev, "%s Failed to set MainChInputCurr\n",
1418 __func__);
1419 return ret;
1420 }
1421 /* ChOutputCurentLevel: protected output current */
1422 ret = ab8500_charger_set_output_curr(di, iset);
1423 if (ret) {
1424 dev_err(di->dev, "%s "
1425 "Failed to set ChOutputCurentLevel\n",
1426 __func__);
1427 return ret;
1428 }
1429
1430 /* Check if VBAT overshoot control should be enabled */
1431 if (!di->bm->enable_overshoot)
1432 overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;
1433
1434 /* Enable Main Charger */
1435 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1436 AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot);
1437 if (ret) {
1438 dev_err(di->dev, "%s write failed\n", __func__);
1439 return ret;
1440 }
1441
1442 /* Power on charging LED indication */
1443 ret = ab8500_charger_led_en(di, true);
1444 if (ret < 0)
1445 dev_err(di->dev, "failed to enable LED\n");
1446
1447 di->ac.charger_online = 1;
1448 } else {
1449 /* Disable AC charging */
1450 if (is_ab8500_1p1_or_earlier(di->parent)) {
1451 /*
1452 * For ABB revision 1.0 and 1.1 there is a bug in the
1453 * watchdog logic. That means we have to continously
1454 * kick the charger watchdog even when no charger is
1455 * connected. This is only valid once the AC charger
1456 * has been enabled. This is a bug that is not handled
1457 * by the algorithm and the watchdog have to be kicked
1458 * by the charger driver when the AC charger
1459 * is disabled
1460 */
1461 if (di->ac_conn) {
1462 queue_delayed_work(di->charger_wq,
1463 &di->kick_wd_work,
1464 round_jiffies(WD_KICK_INTERVAL));
1465 }
1466
1467 /*
1468 * We can't turn off charging completely
1469 * due to a bug in AB8500 cut1.
1470 * If we do, charging will not start again.
1471 * That is why we set the lowest voltage
1472 * and current possible
1473 */
1474 ret = abx500_set_register_interruptible(di->dev,
1475 AB8500_CHARGER,
1476 AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5);
1477 if (ret) {
1478 dev_err(di->dev,
1479 "%s write failed\n", __func__);
1480 return ret;
1481 }
1482
1483 ret = ab8500_charger_set_output_curr(di, 0);
1484 if (ret) {
1485 dev_err(di->dev, "%s "
1486 "Failed to set ChOutputCurentLevel\n",
1487 __func__);
1488 return ret;
1489 }
1490 } else {
1491 ret = abx500_set_register_interruptible(di->dev,
1492 AB8500_CHARGER,
1493 AB8500_MCH_CTRL1, 0);
1494 if (ret) {
1495 dev_err(di->dev,
1496 "%s write failed\n", __func__);
1497 return ret;
1498 }
1499 }
1500
1501 ret = ab8500_charger_led_en(di, false);
1502 if (ret < 0)
1503 dev_err(di->dev, "failed to disable LED\n");
1504
1505 di->ac.charger_online = 0;
1506 di->ac.wd_expired = false;
1507
1508 /* Disable regulator if enabled */
1509 if (di->vddadc_en_ac) {
1510 regulator_disable(di->regu);
1511 di->vddadc_en_ac = false;
1512 }
1513
1514 dev_dbg(di->dev, "%s Disabled AC charging\n", __func__);
1515 }
1516 ab8500_power_supply_changed(di, &di->ac_chg.psy);
1517
1518 return ret;
1519 }
1520
1521 /**
1522 * ab8500_charger_usb_en() - enable usb charging
1523 * @di: pointer to the ab8500_charger structure
1524 * @enable: enable/disable flag
1525 * @vset: charging voltage
1526 * @ich_out: charger output current
1527 *
1528 * Enable/Disable USB charging and turns on/off the charging led respectively.
1529 * Returns error code in case of failure else 0(on success)
1530 */
1531 static int ab8500_charger_usb_en(struct ux500_charger *charger,
1532 int enable, int vset, int ich_out)
1533 {
1534 int ret;
1535 int volt_index;
1536 int curr_index;
1537 u8 overshoot = 0;
1538
1539 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1540
1541 if (enable) {
1542 /* Check if USB is connected */
1543 if (!di->usb.charger_connected) {
1544 dev_err(di->dev, "USB charger not connected\n");
1545 return -ENXIO;
1546 }
1547
1548 /*
1549 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1550 * will be triggered everytime we enable the VDD ADC supply.
1551 * This will turn off charging for a short while.
1552 * It can be avoided by having the supply on when
1553 * there is a charger enabled. Normally the VDD ADC supply
1554 * is enabled everytime a GPADC conversion is triggered. We will
1555 * force it to be enabled from this driver to have
1556 * the GPADC module independant of the AB8500 chargers
1557 */
1558 if (!di->vddadc_en_usb) {
1559 regulator_enable(di->regu);
1560 di->vddadc_en_usb = true;
1561 }
1562
1563 /* Enable USB charging */
1564 dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out);
1565
1566 /* Check if the requested voltage or current is valid */
1567 volt_index = ab8500_voltage_to_regval(vset);
1568 curr_index = ab8500_current_to_regval(di, ich_out);
1569 if (volt_index < 0 || curr_index < 0) {
1570 dev_err(di->dev,
1571 "Charger voltage or current too high, "
1572 "charging not started\n");
1573 return -ENXIO;
1574 }
1575
1576 /* ChVoltLevel: max voltage upto which battery can be charged */
1577 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1578 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1579 if (ret) {
1580 dev_err(di->dev, "%s write failed\n", __func__);
1581 return ret;
1582 }
1583 /* Check if VBAT overshoot control should be enabled */
1584 if (!di->bm->enable_overshoot)
1585 overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;
1586
1587 /* Enable USB Charger */
1588 dev_dbg(di->dev,
1589 "Enabling USB with write to AB8500_USBCH_CTRL1_REG\n");
1590 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1591 AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot);
1592 if (ret) {
1593 dev_err(di->dev, "%s write failed\n", __func__);
1594 return ret;
1595 }
1596
1597 /* If success power on charging LED indication */
1598 ret = ab8500_charger_led_en(di, true);
1599 if (ret < 0)
1600 dev_err(di->dev, "failed to enable LED\n");
1601
1602 di->usb.charger_online = 1;
1603
1604 /* USBChInputCurr: current that can be drawn from the usb */
1605 ret = ab8500_charger_set_vbus_in_curr(di,
1606 di->max_usb_in_curr.usb_type_max);
1607 if (ret) {
1608 dev_err(di->dev, "setting USBChInputCurr failed\n");
1609 return ret;
1610 }
1611
1612 /* ChOutputCurentLevel: protected output current */
1613 ret = ab8500_charger_set_output_curr(di, ich_out);
1614 if (ret) {
1615 dev_err(di->dev, "%s "
1616 "Failed to set ChOutputCurentLevel\n",
1617 __func__);
1618 return ret;
1619 }
1620
1621 queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);
1622
1623 } else {
1624 /* Disable USB charging */
1625 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1626 ret = abx500_set_register_interruptible(di->dev,
1627 AB8500_CHARGER,
1628 AB8500_USBCH_CTRL1_REG, 0);
1629 if (ret) {
1630 dev_err(di->dev,
1631 "%s write failed\n", __func__);
1632 return ret;
1633 }
1634
1635 ret = ab8500_charger_led_en(di, false);
1636 if (ret < 0)
1637 dev_err(di->dev, "failed to disable LED\n");
1638 /* USBChInputCurr: current that can be drawn from the usb */
1639 ret = ab8500_charger_set_vbus_in_curr(di, 0);
1640 if (ret) {
1641 dev_err(di->dev, "setting USBChInputCurr failed\n");
1642 return ret;
1643 }
1644
1645 /* ChOutputCurentLevel: protected output current */
1646 ret = ab8500_charger_set_output_curr(di, 0);
1647 if (ret) {
1648 dev_err(di->dev, "%s "
1649 "Failed to reset ChOutputCurentLevel\n",
1650 __func__);
1651 return ret;
1652 }
1653 di->usb.charger_online = 0;
1654 di->usb.wd_expired = false;
1655
1656 /* Disable regulator if enabled */
1657 if (di->vddadc_en_usb) {
1658 regulator_disable(di->regu);
1659 di->vddadc_en_usb = false;
1660 }
1661
1662 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1663
1664 /* Cancel any pending Vbat check work */
1665 cancel_delayed_work(&di->check_vbat_work);
1666
1667 }
1668 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1669
1670 return ret;
1671 }
1672
1673 static int ab8500_external_charger_prepare(struct notifier_block *charger_nb,
1674 unsigned long event, void *data)
1675 {
1676 int ret;
1677 struct device *dev = data;
1678 /*Toggle External charger control pin*/
1679 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1680 AB8500_SYS_CHARGER_CONTROL_REG,
1681 EXTERNAL_CHARGER_DISABLE_REG_VAL);
1682 if (ret < 0) {
1683 dev_err(dev, "write reg failed %d\n", ret);
1684 goto out;
1685 }
1686 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1687 AB8500_SYS_CHARGER_CONTROL_REG,
1688 EXTERNAL_CHARGER_ENABLE_REG_VAL);
1689 if (ret < 0)
1690 dev_err(dev, "Write reg failed %d\n", ret);
1691
1692 out:
1693 return ret;
1694 }
1695
1696 /**
1697 * ab8500_charger_usb_check_enable() - enable usb charging
1698 * @charger: pointer to the ux500_charger structure
1699 * @vset: charging voltage
1700 * @iset: charger output current
1701 *
1702 * Check if the VBUS charger has been disconnected and reconnected without
1703 * AB8500 rising an interrupt. Returns 0 on success.
1704 */
1705 static int ab8500_charger_usb_check_enable(struct ux500_charger *charger,
1706 int vset, int iset)
1707 {
1708 u8 usbch_ctrl1 = 0;
1709 int ret = 0;
1710
1711 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1712
1713 if (!di->usb.charger_connected)
1714 return ret;
1715
1716 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1717 AB8500_USBCH_CTRL1_REG, &usbch_ctrl1);
1718 if (ret < 0) {
1719 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1720 return ret;
1721 }
1722 dev_dbg(di->dev, "USB charger ctrl: 0x%02x\n", usbch_ctrl1);
1723
1724 if (!(usbch_ctrl1 & USB_CH_ENA)) {
1725 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1726
1727 ret = abx500_mask_and_set_register_interruptible(di->dev,
1728 AB8500_CHARGER, AB8500_CHARGER_CTRL,
1729 DROP_COUNT_RESET, DROP_COUNT_RESET);
1730 if (ret < 0) {
1731 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1732 return ret;
1733 }
1734
1735 ret = ab8500_charger_usb_en(&di->usb_chg, true, vset, iset);
1736 if (ret < 0) {
1737 dev_err(di->dev, "Failed to enable VBUS charger %d\n",
1738 __LINE__);
1739 return ret;
1740 }
1741 }
1742 return ret;
1743 }
1744
1745 /**
1746 * ab8500_charger_ac_check_enable() - enable usb charging
1747 * @charger: pointer to the ux500_charger structure
1748 * @vset: charging voltage
1749 * @iset: charger output current
1750 *
1751 * Check if the AC charger has been disconnected and reconnected without
1752 * AB8500 rising an interrupt. Returns 0 on success.
1753 */
1754 static int ab8500_charger_ac_check_enable(struct ux500_charger *charger,
1755 int vset, int iset)
1756 {
1757 u8 mainch_ctrl1 = 0;
1758 int ret = 0;
1759
1760 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1761
1762 if (!di->ac.charger_connected)
1763 return ret;
1764
1765 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1766 AB8500_MCH_CTRL1, &mainch_ctrl1);
1767 if (ret < 0) {
1768 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1769 return ret;
1770 }
1771 dev_dbg(di->dev, "AC charger ctrl: 0x%02x\n", mainch_ctrl1);
1772
1773 if (!(mainch_ctrl1 & MAIN_CH_ENA)) {
1774 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1775
1776 ret = abx500_mask_and_set_register_interruptible(di->dev,
1777 AB8500_CHARGER, AB8500_CHARGER_CTRL,
1778 DROP_COUNT_RESET, DROP_COUNT_RESET);
1779
1780 if (ret < 0) {
1781 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1782 return ret;
1783 }
1784
1785 ret = ab8500_charger_ac_en(&di->usb_chg, true, vset, iset);
1786 if (ret < 0) {
1787 dev_err(di->dev, "failed to enable AC charger %d\n",
1788 __LINE__);
1789 return ret;
1790 }
1791 }
1792 return ret;
1793 }
1794
1795 /**
1796 * ab8500_charger_watchdog_kick() - kick charger watchdog
1797 * @di: pointer to the ab8500_charger structure
1798 *
1799 * Kick charger watchdog
1800 * Returns error code in case of failure else 0(on success)
1801 */
1802 static int ab8500_charger_watchdog_kick(struct ux500_charger *charger)
1803 {
1804 int ret;
1805 struct ab8500_charger *di;
1806
1807 if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS)
1808 di = to_ab8500_charger_ac_device_info(charger);
1809 else if (charger->psy.type == POWER_SUPPLY_TYPE_USB)
1810 di = to_ab8500_charger_usb_device_info(charger);
1811 else
1812 return -ENXIO;
1813
1814 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1815 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
1816 if (ret)
1817 dev_err(di->dev, "Failed to kick WD!\n");
1818
1819 return ret;
1820 }
1821
1822 /**
1823 * ab8500_charger_update_charger_current() - update charger current
1824 * @di: pointer to the ab8500_charger structure
1825 *
1826 * Update the charger output current for the specified charger
1827 * Returns error code in case of failure else 0(on success)
1828 */
1829 static int ab8500_charger_update_charger_current(struct ux500_charger *charger,
1830 int ich_out)
1831 {
1832 int ret;
1833 struct ab8500_charger *di;
1834
1835 if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS)
1836 di = to_ab8500_charger_ac_device_info(charger);
1837 else if (charger->psy.type == POWER_SUPPLY_TYPE_USB)
1838 di = to_ab8500_charger_usb_device_info(charger);
1839 else
1840 return -ENXIO;
1841
1842 ret = ab8500_charger_set_output_curr(di, ich_out);
1843 if (ret) {
1844 dev_err(di->dev, "%s "
1845 "Failed to set ChOutputCurentLevel\n",
1846 __func__);
1847 return ret;
1848 }
1849
1850 /* Reset the main and usb drop input current measurement counter */
1851 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1852 AB8500_CHARGER_CTRL, DROP_COUNT_RESET);
1853 if (ret) {
1854 dev_err(di->dev, "%s write failed\n", __func__);
1855 return ret;
1856 }
1857
1858 return ret;
1859 }
1860
1861 /**
1862 * ab8540_charger_power_path_enable() - enable usb power path mode
1863 * @charger: pointer to the ux500_charger structure
1864 * @enable: enable/disable flag
1865 *
1866 * Enable or disable the power path for usb mode
1867 * Returns error code in case of failure else 0(on success)
1868 */
1869 static int ab8540_charger_power_path_enable(struct ux500_charger *charger,
1870 bool enable)
1871 {
1872 int ret;
1873 struct ab8500_charger *di;
1874
1875 if (charger->psy.type == POWER_SUPPLY_TYPE_USB)
1876 di = to_ab8500_charger_usb_device_info(charger);
1877 else
1878 return -ENXIO;
1879
1880 ret = abx500_mask_and_set_register_interruptible(di->dev,
1881 AB8500_CHARGER, AB8540_USB_PP_MODE_REG,
1882 BUS_POWER_PATH_MODE_ENA, enable);
1883 if (ret) {
1884 dev_err(di->dev, "%s write failed\n", __func__);
1885 return ret;
1886 }
1887
1888 return ret;
1889 }
1890
1891
1892 /**
1893 * ab8540_charger_usb_pre_chg_enable() - enable usb pre change
1894 * @charger: pointer to the ux500_charger structure
1895 * @enable: enable/disable flag
1896 *
1897 * Enable or disable the pre-chage for usb mode
1898 * Returns error code in case of failure else 0(on success)
1899 */
1900 static int ab8540_charger_usb_pre_chg_enable(struct ux500_charger *charger,
1901 bool enable)
1902 {
1903 int ret;
1904 struct ab8500_charger *di;
1905
1906 if (charger->psy.type == POWER_SUPPLY_TYPE_USB)
1907 di = to_ab8500_charger_usb_device_info(charger);
1908 else
1909 return -ENXIO;
1910
1911 ret = abx500_mask_and_set_register_interruptible(di->dev,
1912 AB8500_CHARGER, AB8540_USB_PP_CHR_REG,
1913 BUS_POWER_PATH_PRECHG_ENA, enable);
1914 if (ret) {
1915 dev_err(di->dev, "%s write failed\n", __func__);
1916 return ret;
1917 }
1918
1919 return ret;
1920 }
1921
1922 static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
1923 {
1924 struct power_supply *psy;
1925 struct power_supply *ext;
1926 struct ab8500_charger *di;
1927 union power_supply_propval ret;
1928 int i, j;
1929 bool psy_found = false;
1930 struct ux500_charger *usb_chg;
1931
1932 usb_chg = (struct ux500_charger *)data;
1933 psy = &usb_chg->psy;
1934
1935 di = to_ab8500_charger_usb_device_info(usb_chg);
1936
1937 ext = dev_get_drvdata(dev);
1938
1939 /* For all psy where the driver name appears in any supplied_to */
1940 for (i = 0; i < ext->num_supplicants; i++) {
1941 if (!strcmp(ext->supplied_to[i], psy->name))
1942 psy_found = true;
1943 }
1944
1945 if (!psy_found)
1946 return 0;
1947
1948 /* Go through all properties for the psy */
1949 for (j = 0; j < ext->num_properties; j++) {
1950 enum power_supply_property prop;
1951 prop = ext->properties[j];
1952
1953 if (ext->get_property(ext, prop, &ret))
1954 continue;
1955
1956 switch (prop) {
1957 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1958 switch (ext->type) {
1959 case POWER_SUPPLY_TYPE_BATTERY:
1960 di->vbat = ret.intval / 1000;
1961 break;
1962 default:
1963 break;
1964 }
1965 break;
1966 default:
1967 break;
1968 }
1969 }
1970 return 0;
1971 }
1972
1973 /**
1974 * ab8500_charger_check_vbat_work() - keep vbus current within spec
1975 * @work pointer to the work_struct structure
1976 *
1977 * Due to a asic bug it is necessary to lower the input current to the vbus
1978 * charger when charging with at some specific levels. This issue is only valid
1979 * for below a certain battery voltage. This function makes sure that the
1980 * the allowed current limit isn't exceeded.
1981 */
1982 static void ab8500_charger_check_vbat_work(struct work_struct *work)
1983 {
1984 int t = 10;
1985 struct ab8500_charger *di = container_of(work,
1986 struct ab8500_charger, check_vbat_work.work);
1987
1988 class_for_each_device(power_supply_class, NULL,
1989 &di->usb_chg.psy, ab8500_charger_get_ext_psy_data);
1990
1991 /* First run old_vbat is 0. */
1992 if (di->old_vbat == 0)
1993 di->old_vbat = di->vbat;
1994
1995 if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED &&
1996 di->vbat <= VBAT_TRESH_IP_CUR_RED) ||
1997 (di->old_vbat > VBAT_TRESH_IP_CUR_RED &&
1998 di->vbat > VBAT_TRESH_IP_CUR_RED))) {
1999
2000 dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d,"
2001 " old: %d\n", di->max_usb_in_curr.usb_type_max,
2002 di->vbat, di->old_vbat);
2003 ab8500_charger_set_vbus_in_curr(di,
2004 di->max_usb_in_curr.usb_type_max);
2005 power_supply_changed(&di->usb_chg.psy);
2006 }
2007
2008 di->old_vbat = di->vbat;
2009
2010 /*
2011 * No need to check the battery voltage every second when not close to
2012 * the threshold.
2013 */
2014 if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) &&
2015 (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100)))
2016 t = 1;
2017
2018 queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ);
2019 }
2020
2021 /**
2022 * ab8500_charger_check_hw_failure_work() - check main charger failure
2023 * @work: pointer to the work_struct structure
2024 *
2025 * Work queue function for checking the main charger status
2026 */
2027 static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
2028 {
2029 int ret;
2030 u8 reg_value;
2031
2032 struct ab8500_charger *di = container_of(work,
2033 struct ab8500_charger, check_hw_failure_work.work);
2034
2035 /* Check if the status bits for HW failure is still active */
2036 if (di->flags.mainextchnotok) {
2037 ret = abx500_get_register_interruptible(di->dev,
2038 AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
2039 if (ret < 0) {
2040 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2041 return;
2042 }
2043 if (!(reg_value & MAIN_CH_NOK)) {
2044 di->flags.mainextchnotok = false;
2045 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2046 }
2047 }
2048 if (di->flags.vbus_ovv) {
2049 ret = abx500_get_register_interruptible(di->dev,
2050 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG,
2051 &reg_value);
2052 if (ret < 0) {
2053 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2054 return;
2055 }
2056 if (!(reg_value & VBUS_OVV_TH)) {
2057 di->flags.vbus_ovv = false;
2058 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2059 }
2060 }
2061 /* If we still have a failure, schedule a new check */
2062 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
2063 queue_delayed_work(di->charger_wq,
2064 &di->check_hw_failure_work, round_jiffies(HZ));
2065 }
2066 }
2067
2068 /**
2069 * ab8500_charger_kick_watchdog_work() - kick the watchdog
2070 * @work: pointer to the work_struct structure
2071 *
2072 * Work queue function for kicking the charger watchdog.
2073 *
2074 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
2075 * logic. That means we have to continously kick the charger
2076 * watchdog even when no charger is connected. This is only
2077 * valid once the AC charger has been enabled. This is
2078 * a bug that is not handled by the algorithm and the
2079 * watchdog have to be kicked by the charger driver
2080 * when the AC charger is disabled
2081 */
2082 static void ab8500_charger_kick_watchdog_work(struct work_struct *work)
2083 {
2084 int ret;
2085
2086 struct ab8500_charger *di = container_of(work,
2087 struct ab8500_charger, kick_wd_work.work);
2088
2089 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
2090 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
2091 if (ret)
2092 dev_err(di->dev, "Failed to kick WD!\n");
2093
2094 /* Schedule a new watchdog kick */
2095 queue_delayed_work(di->charger_wq,
2096 &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL));
2097 }
2098
2099 /**
2100 * ab8500_charger_ac_work() - work to get and set main charger status
2101 * @work: pointer to the work_struct structure
2102 *
2103 * Work queue function for checking the main charger status
2104 */
2105 static void ab8500_charger_ac_work(struct work_struct *work)
2106 {
2107 int ret;
2108
2109 struct ab8500_charger *di = container_of(work,
2110 struct ab8500_charger, ac_work);
2111
2112 /*
2113 * Since we can't be sure that the events are received
2114 * synchronously, we have the check if the main charger is
2115 * connected by reading the status register
2116 */
2117 ret = ab8500_charger_detect_chargers(di, false);
2118 if (ret < 0)
2119 return;
2120
2121 if (ret & AC_PW_CONN) {
2122 di->ac.charger_connected = 1;
2123 di->ac_conn = true;
2124 } else {
2125 di->ac.charger_connected = 0;
2126 }
2127
2128 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2129 sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present");
2130 }
2131
2132 static void ab8500_charger_usb_attached_work(struct work_struct *work)
2133 {
2134 struct ab8500_charger *di = container_of(work,
2135 struct ab8500_charger,
2136 usb_charger_attached_work.work);
2137 int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC);
2138 int ret, i;
2139 u8 statval;
2140
2141 for (i = 0; i < 10; i++) {
2142 ret = abx500_get_register_interruptible(di->dev,
2143 AB8500_CHARGER,
2144 AB8500_CH_USBCH_STAT1_REG,
2145 &statval);
2146 if (ret < 0) {
2147 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2148 goto reschedule;
2149 }
2150 if ((statval & usbch) != usbch)
2151 goto reschedule;
2152
2153 msleep(CHARGER_STATUS_POLL);
2154 }
2155
2156 ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0);
2157
2158 mutex_lock(&di->charger_attached_mutex);
2159 mutex_unlock(&di->charger_attached_mutex);
2160
2161 return;
2162
2163 reschedule:
2164 queue_delayed_work(di->charger_wq,
2165 &di->usb_charger_attached_work,
2166 HZ);
2167 }
2168
2169 static void ab8500_charger_ac_attached_work(struct work_struct *work)
2170 {
2171
2172 struct ab8500_charger *di = container_of(work,
2173 struct ab8500_charger,
2174 ac_charger_attached_work.work);
2175 int mainch = (MAIN_CH_STATUS2_MAINCHGDROP |
2176 MAIN_CH_STATUS2_MAINCHARGERDETDBNC);
2177 int ret, i;
2178 u8 statval;
2179
2180 for (i = 0; i < 10; i++) {
2181 ret = abx500_get_register_interruptible(di->dev,
2182 AB8500_CHARGER,
2183 AB8500_CH_STATUS2_REG,
2184 &statval);
2185 if (ret < 0) {
2186 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2187 goto reschedule;
2188 }
2189
2190 if ((statval & mainch) != mainch)
2191 goto reschedule;
2192
2193 msleep(CHARGER_STATUS_POLL);
2194 }
2195
2196 ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0);
2197 queue_work(di->charger_wq, &di->ac_work);
2198
2199 mutex_lock(&di->charger_attached_mutex);
2200 mutex_unlock(&di->charger_attached_mutex);
2201
2202 return;
2203
2204 reschedule:
2205 queue_delayed_work(di->charger_wq,
2206 &di->ac_charger_attached_work,
2207 HZ);
2208 }
2209
2210 /**
2211 * ab8500_charger_detect_usb_type_work() - work to detect USB type
2212 * @work: Pointer to the work_struct structure
2213 *
2214 * Detect the type of USB plugged
2215 */
2216 static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
2217 {
2218 int ret;
2219
2220 struct ab8500_charger *di = container_of(work,
2221 struct ab8500_charger, detect_usb_type_work);
2222
2223 /*
2224 * Since we can't be sure that the events are received
2225 * synchronously, we have the check if is
2226 * connected by reading the status register
2227 */
2228 ret = ab8500_charger_detect_chargers(di, false);
2229 if (ret < 0)
2230 return;
2231
2232 if (!(ret & USB_PW_CONN)) {
2233 dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__);
2234 di->vbus_detected = false;
2235 ab8500_charger_set_usb_connected(di, false);
2236 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2237 } else {
2238 dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__);
2239 di->vbus_detected = true;
2240
2241 if (is_ab8500_1p1_or_earlier(di->parent)) {
2242 ret = ab8500_charger_detect_usb_type(di);
2243 if (!ret) {
2244 ab8500_charger_set_usb_connected(di, true);
2245 ab8500_power_supply_changed(di,
2246 &di->usb_chg.psy);
2247 }
2248 } else {
2249 /*
2250 * For ABB cut2.0 and onwards we have an IRQ,
2251 * USB_LINK_STATUS that will be triggered when the USB
2252 * link status changes. The exception is USB connected
2253 * during startup. Then we don't get a
2254 * USB_LINK_STATUS IRQ
2255 */
2256 if (di->vbus_detected_start) {
2257 di->vbus_detected_start = false;
2258 ret = ab8500_charger_detect_usb_type(di);
2259 if (!ret) {
2260 ab8500_charger_set_usb_connected(di,
2261 true);
2262 ab8500_power_supply_changed(di,
2263 &di->usb_chg.psy);
2264 }
2265 }
2266 }
2267 }
2268 }
2269
2270 /**
2271 * ab8500_charger_usb_link_attach_work() - work to detect USB type
2272 * @work: pointer to the work_struct structure
2273 *
2274 * Detect the type of USB plugged
2275 */
2276 static void ab8500_charger_usb_link_attach_work(struct work_struct *work)
2277 {
2278 struct ab8500_charger *di =
2279 container_of(work, struct ab8500_charger, attach_work.work);
2280 int ret;
2281
2282 /* Update maximum input current if USB enumeration is not detected */
2283 if (!di->usb.charger_online) {
2284 ret = ab8500_charger_set_vbus_in_curr(di,
2285 di->max_usb_in_curr.usb_type_max);
2286 if (ret)
2287 return;
2288 }
2289
2290 ab8500_charger_set_usb_connected(di, true);
2291 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2292 }
2293
2294 /**
2295 * ab8500_charger_usb_link_status_work() - work to detect USB type
2296 * @work: pointer to the work_struct structure
2297 *
2298 * Detect the type of USB plugged
2299 */
2300 static void ab8500_charger_usb_link_status_work(struct work_struct *work)
2301 {
2302 int detected_chargers;
2303 int ret;
2304 u8 val;
2305 u8 link_status;
2306
2307 struct ab8500_charger *di = container_of(work,
2308 struct ab8500_charger, usb_link_status_work);
2309
2310 /*
2311 * Since we can't be sure that the events are received
2312 * synchronously, we have the check if is
2313 * connected by reading the status register
2314 */
2315 detected_chargers = ab8500_charger_detect_chargers(di, false);
2316 if (detected_chargers < 0)
2317 return;
2318
2319 /*
2320 * Some chargers that breaks the USB spec is
2321 * identified as invalid by AB8500 and it refuse
2322 * to start the charging process. but by jumping
2323 * thru a few hoops it can be forced to start.
2324 */
2325 if (is_ab8500(di->parent))
2326 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2327 AB8500_USB_LINE_STAT_REG, &val);
2328 else
2329 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2330 AB8500_USB_LINK1_STAT_REG, &val);
2331
2332 if (ret >= 0)
2333 dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val);
2334 else
2335 dev_dbg(di->dev, "Error reading USB link status\n");
2336
2337 if (is_ab8500(di->parent))
2338 link_status = AB8500_USB_LINK_STATUS;
2339 else
2340 link_status = AB8505_USB_LINK_STATUS;
2341
2342 if (detected_chargers & USB_PW_CONN) {
2343 if (((val & link_status) >> USB_LINK_STATUS_SHIFT) ==
2344 USB_STAT_NOT_VALID_LINK &&
2345 di->invalid_charger_detect_state == 0) {
2346 dev_dbg(di->dev,
2347 "Invalid charger detected, state= 0\n");
2348 /*Enable charger*/
2349 abx500_mask_and_set_register_interruptible(di->dev,
2350 AB8500_CHARGER, AB8500_USBCH_CTRL1_REG,
2351 USB_CH_ENA, USB_CH_ENA);
2352 /*Enable charger detection*/
2353 abx500_mask_and_set_register_interruptible(di->dev,
2354 AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2355 USB_CH_DET, USB_CH_DET);
2356 di->invalid_charger_detect_state = 1;
2357 /*exit and wait for new link status interrupt.*/
2358 return;
2359
2360 }
2361 if (di->invalid_charger_detect_state == 1) {
2362 dev_dbg(di->dev,
2363 "Invalid charger detected, state= 1\n");
2364 /*Stop charger detection*/
2365 abx500_mask_and_set_register_interruptible(di->dev,
2366 AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2367 USB_CH_DET, 0x00);
2368 /*Check link status*/
2369 if (is_ab8500(di->parent))
2370 ret = abx500_get_register_interruptible(di->dev,
2371 AB8500_USB, AB8500_USB_LINE_STAT_REG,
2372 &val);
2373 else
2374 ret = abx500_get_register_interruptible(di->dev,
2375 AB8500_USB, AB8500_USB_LINK1_STAT_REG,
2376 &val);
2377
2378 dev_dbg(di->dev, "USB link status= 0x%02x\n",
2379 (val & link_status) >> USB_LINK_STATUS_SHIFT);
2380 di->invalid_charger_detect_state = 2;
2381 }
2382 } else {
2383 di->invalid_charger_detect_state = 0;
2384 }
2385
2386 if (!(detected_chargers & USB_PW_CONN)) {
2387 di->vbus_detected = false;
2388 ab8500_charger_set_usb_connected(di, false);
2389 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2390 return;
2391 }
2392
2393 dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__);
2394 di->vbus_detected = true;
2395 ret = ab8500_charger_read_usb_type(di);
2396 if (ret) {
2397 if (ret == -ENXIO) {
2398 /* No valid charger type detected */
2399 ab8500_charger_set_usb_connected(di, false);
2400 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2401 }
2402 return;
2403 }
2404
2405 if (di->usb_device_is_unrecognised) {
2406 dev_dbg(di->dev,
2407 "Potential Legacy Charger device. "
2408 "Delay work for %d msec for USB enum "
2409 "to finish",
2410 WAIT_ACA_RID_ENUMERATION);
2411 queue_delayed_work(di->charger_wq,
2412 &di->attach_work,
2413 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2414 } else if (di->is_aca_rid == 1) {
2415 /* Only wait once */
2416 di->is_aca_rid++;
2417 dev_dbg(di->dev,
2418 "%s Wait %d msec for USB enum to finish",
2419 __func__, WAIT_ACA_RID_ENUMERATION);
2420 queue_delayed_work(di->charger_wq,
2421 &di->attach_work,
2422 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2423 } else {
2424 queue_delayed_work(di->charger_wq,
2425 &di->attach_work,
2426 0);
2427 }
2428 }
2429
2430 static void ab8500_charger_usb_state_changed_work(struct work_struct *work)
2431 {
2432 int ret;
2433 unsigned long flags;
2434
2435 struct ab8500_charger *di = container_of(work,
2436 struct ab8500_charger, usb_state_changed_work.work);
2437
2438 if (!di->vbus_detected) {
2439 dev_dbg(di->dev,
2440 "%s !di->vbus_detected\n",
2441 __func__);
2442 return;
2443 }
2444
2445 spin_lock_irqsave(&di->usb_state.usb_lock, flags);
2446 di->usb_state.state = di->usb_state.state_tmp;
2447 di->usb_state.usb_current = di->usb_state.usb_current_tmp;
2448 spin_unlock_irqrestore(&di->usb_state.usb_lock, flags);
2449
2450 dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n",
2451 __func__, di->usb_state.state, di->usb_state.usb_current);
2452
2453 switch (di->usb_state.state) {
2454 case AB8500_BM_USB_STATE_RESET_HS:
2455 case AB8500_BM_USB_STATE_RESET_FS:
2456 case AB8500_BM_USB_STATE_SUSPEND:
2457 case AB8500_BM_USB_STATE_MAX:
2458 ab8500_charger_set_usb_connected(di, false);
2459 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2460 break;
2461
2462 case AB8500_BM_USB_STATE_RESUME:
2463 /*
2464 * when suspend->resume there should be delay
2465 * of 1sec for enabling charging
2466 */
2467 msleep(1000);
2468 /* Intentional fall through */
2469 case AB8500_BM_USB_STATE_CONFIGURED:
2470 /*
2471 * USB is configured, enable charging with the charging
2472 * input current obtained from USB driver
2473 */
2474 if (!ab8500_charger_get_usb_cur(di)) {
2475 /* Update maximum input current */
2476 ret = ab8500_charger_set_vbus_in_curr(di,
2477 di->max_usb_in_curr.usb_type_max);
2478 if (ret)
2479 return;
2480
2481 ab8500_charger_set_usb_connected(di, true);
2482 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2483 }
2484 break;
2485
2486 default:
2487 break;
2488 };
2489 }
2490
2491 /**
2492 * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status
2493 * @work: pointer to the work_struct structure
2494 *
2495 * Work queue function for checking the USB charger Not OK status
2496 */
2497 static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work)
2498 {
2499 int ret;
2500 u8 reg_value;
2501 bool prev_status;
2502
2503 struct ab8500_charger *di = container_of(work,
2504 struct ab8500_charger, check_usbchgnotok_work.work);
2505
2506 /* Check if the status bit for usbchargernotok is still active */
2507 ret = abx500_get_register_interruptible(di->dev,
2508 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
2509 if (ret < 0) {
2510 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2511 return;
2512 }
2513 prev_status = di->flags.usbchargernotok;
2514
2515 if (reg_value & VBUS_CH_NOK) {
2516 di->flags.usbchargernotok = true;
2517 /* Check again in 1sec */
2518 queue_delayed_work(di->charger_wq,
2519 &di->check_usbchgnotok_work, HZ);
2520 } else {
2521 di->flags.usbchargernotok = false;
2522 di->flags.vbus_collapse = false;
2523 }
2524
2525 if (prev_status != di->flags.usbchargernotok)
2526 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2527 }
2528
2529 /**
2530 * ab8500_charger_check_main_thermal_prot_work() - check main thermal status
2531 * @work: pointer to the work_struct structure
2532 *
2533 * Work queue function for checking the Main thermal prot status
2534 */
2535 static void ab8500_charger_check_main_thermal_prot_work(
2536 struct work_struct *work)
2537 {
2538 int ret;
2539 u8 reg_value;
2540
2541 struct ab8500_charger *di = container_of(work,
2542 struct ab8500_charger, check_main_thermal_prot_work);
2543
2544 /* Check if the status bit for main_thermal_prot is still active */
2545 ret = abx500_get_register_interruptible(di->dev,
2546 AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
2547 if (ret < 0) {
2548 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2549 return;
2550 }
2551 if (reg_value & MAIN_CH_TH_PROT)
2552 di->flags.main_thermal_prot = true;
2553 else
2554 di->flags.main_thermal_prot = false;
2555
2556 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2557 }
2558
2559 /**
2560 * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status
2561 * @work: pointer to the work_struct structure
2562 *
2563 * Work queue function for checking the USB thermal prot status
2564 */
2565 static void ab8500_charger_check_usb_thermal_prot_work(
2566 struct work_struct *work)
2567 {
2568 int ret;
2569 u8 reg_value;
2570
2571 struct ab8500_charger *di = container_of(work,
2572 struct ab8500_charger, check_usb_thermal_prot_work);
2573
2574 /* Check if the status bit for usb_thermal_prot is still active */
2575 ret = abx500_get_register_interruptible(di->dev,
2576 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
2577 if (ret < 0) {
2578 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2579 return;
2580 }
2581 if (reg_value & USB_CH_TH_PROT)
2582 di->flags.usb_thermal_prot = true;
2583 else
2584 di->flags.usb_thermal_prot = false;
2585
2586 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2587 }
2588
2589 /**
2590 * ab8500_charger_mainchunplugdet_handler() - main charger unplugged
2591 * @irq: interrupt number
2592 * @_di: pointer to the ab8500_charger structure
2593 *
2594 * Returns IRQ status(IRQ_HANDLED)
2595 */
2596 static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di)
2597 {
2598 struct ab8500_charger *di = _di;
2599
2600 dev_dbg(di->dev, "Main charger unplugged\n");
2601 queue_work(di->charger_wq, &di->ac_work);
2602
2603 cancel_delayed_work_sync(&di->ac_charger_attached_work);
2604 mutex_lock(&di->charger_attached_mutex);
2605 mutex_unlock(&di->charger_attached_mutex);
2606
2607 return IRQ_HANDLED;
2608 }
2609
2610 /**
2611 * ab8500_charger_mainchplugdet_handler() - main charger plugged
2612 * @irq: interrupt number
2613 * @_di: pointer to the ab8500_charger structure
2614 *
2615 * Returns IRQ status(IRQ_HANDLED)
2616 */
2617 static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di)
2618 {
2619 struct ab8500_charger *di = _di;
2620
2621 dev_dbg(di->dev, "Main charger plugged\n");
2622 queue_work(di->charger_wq, &di->ac_work);
2623
2624 mutex_lock(&di->charger_attached_mutex);
2625 mutex_unlock(&di->charger_attached_mutex);
2626
2627 if (is_ab8500(di->parent))
2628 queue_delayed_work(di->charger_wq,
2629 &di->ac_charger_attached_work,
2630 HZ);
2631 return IRQ_HANDLED;
2632 }
2633
2634 /**
2635 * ab8500_charger_mainextchnotok_handler() - main charger not ok
2636 * @irq: interrupt number
2637 * @_di: pointer to the ab8500_charger structure
2638 *
2639 * Returns IRQ status(IRQ_HANDLED)
2640 */
2641 static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di)
2642 {
2643 struct ab8500_charger *di = _di;
2644
2645 dev_dbg(di->dev, "Main charger not ok\n");
2646 di->flags.mainextchnotok = true;
2647 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2648
2649 /* Schedule a new HW failure check */
2650 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2651
2652 return IRQ_HANDLED;
2653 }
2654
2655 /**
2656 * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger
2657 * thermal protection threshold
2658 * @irq: interrupt number
2659 * @_di: pointer to the ab8500_charger structure
2660 *
2661 * Returns IRQ status(IRQ_HANDLED)
2662 */
2663 static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di)
2664 {
2665 struct ab8500_charger *di = _di;
2666
2667 dev_dbg(di->dev,
2668 "Die temp above Main charger thermal protection threshold\n");
2669 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2670
2671 return IRQ_HANDLED;
2672 }
2673
2674 /**
2675 * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger
2676 * thermal protection threshold
2677 * @irq: interrupt number
2678 * @_di: pointer to the ab8500_charger structure
2679 *
2680 * Returns IRQ status(IRQ_HANDLED)
2681 */
2682 static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di)
2683 {
2684 struct ab8500_charger *di = _di;
2685
2686 dev_dbg(di->dev,
2687 "Die temp ok for Main charger thermal protection threshold\n");
2688 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2689
2690 return IRQ_HANDLED;
2691 }
2692
2693 static void ab8500_charger_vbus_drop_end_work(struct work_struct *work)
2694 {
2695 struct ab8500_charger *di = container_of(work,
2696 struct ab8500_charger, vbus_drop_end_work.work);
2697 int ret, curr;
2698 u8 reg_value;
2699
2700 di->flags.vbus_drop_end = false;
2701
2702 /* Reset the drop counter */
2703 abx500_set_register_interruptible(di->dev,
2704 AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01);
2705
2706 if (is_ab8540(di->parent))
2707 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
2708 AB8540_CH_USBCH_STAT3_REG, &reg_value);
2709 else
2710 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
2711 AB8500_CH_USBCH_STAT2_REG, &reg_value);
2712 if (ret < 0) {
2713 dev_err(di->dev, "%s read failed\n", __func__);
2714 return;
2715 }
2716
2717 if (is_ab8540(di->parent))
2718 curr = di->bm->chg_input_curr[
2719 reg_value & AB8540_AUTO_VBUS_IN_CURR_MASK];
2720 else
2721 curr = di->bm->chg_input_curr[
2722 reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT];
2723
2724 if (di->max_usb_in_curr.calculated_max != curr) {
2725 /* USB source is collapsing */
2726 di->max_usb_in_curr.calculated_max = curr;
2727 dev_dbg(di->dev,
2728 "VBUS input current limiting to %d mA\n",
2729 di->max_usb_in_curr.calculated_max);
2730 } else {
2731 /*
2732 * USB source can not give more than this amount.
2733 * Taking more will collapse the source.
2734 */
2735 di->max_usb_in_curr.set_max =
2736 di->max_usb_in_curr.calculated_max;
2737 dev_dbg(di->dev,
2738 "VBUS input current limited to %d mA\n",
2739 di->max_usb_in_curr.set_max);
2740 }
2741
2742 if (di->usb.charger_connected)
2743 ab8500_charger_set_vbus_in_curr(di,
2744 di->max_usb_in_curr.usb_type_max);
2745 }
2746
2747 /**
2748 * ab8500_charger_vbusdetf_handler() - VBUS falling detected
2749 * @irq: interrupt number
2750 * @_di: pointer to the ab8500_charger structure
2751 *
2752 * Returns IRQ status(IRQ_HANDLED)
2753 */
2754 static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di)
2755 {
2756 struct ab8500_charger *di = _di;
2757
2758 di->vbus_detected = false;
2759 dev_dbg(di->dev, "VBUS falling detected\n");
2760 queue_work(di->charger_wq, &di->detect_usb_type_work);
2761
2762 return IRQ_HANDLED;
2763 }
2764
2765 /**
2766 * ab8500_charger_vbusdetr_handler() - VBUS rising detected
2767 * @irq: interrupt number
2768 * @_di: pointer to the ab8500_charger structure
2769 *
2770 * Returns IRQ status(IRQ_HANDLED)
2771 */
2772 static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di)
2773 {
2774 struct ab8500_charger *di = _di;
2775
2776 di->vbus_detected = true;
2777 dev_dbg(di->dev, "VBUS rising detected\n");
2778
2779 queue_work(di->charger_wq, &di->detect_usb_type_work);
2780
2781 return IRQ_HANDLED;
2782 }
2783
2784 /**
2785 * ab8500_charger_usblinkstatus_handler() - USB link status has changed
2786 * @irq: interrupt number
2787 * @_di: pointer to the ab8500_charger structure
2788 *
2789 * Returns IRQ status(IRQ_HANDLED)
2790 */
2791 static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di)
2792 {
2793 struct ab8500_charger *di = _di;
2794
2795 dev_dbg(di->dev, "USB link status changed\n");
2796
2797 queue_work(di->charger_wq, &di->usb_link_status_work);
2798
2799 return IRQ_HANDLED;
2800 }
2801
2802 /**
2803 * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger
2804 * thermal protection threshold
2805 * @irq: interrupt number
2806 * @_di: pointer to the ab8500_charger structure
2807 *
2808 * Returns IRQ status(IRQ_HANDLED)
2809 */
2810 static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di)
2811 {
2812 struct ab8500_charger *di = _di;
2813
2814 dev_dbg(di->dev,
2815 "Die temp above USB charger thermal protection threshold\n");
2816 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2817
2818 return IRQ_HANDLED;
2819 }
2820
2821 /**
2822 * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger
2823 * thermal protection threshold
2824 * @irq: interrupt number
2825 * @_di: pointer to the ab8500_charger structure
2826 *
2827 * Returns IRQ status(IRQ_HANDLED)
2828 */
2829 static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di)
2830 {
2831 struct ab8500_charger *di = _di;
2832
2833 dev_dbg(di->dev,
2834 "Die temp ok for USB charger thermal protection threshold\n");
2835 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2836
2837 return IRQ_HANDLED;
2838 }
2839
2840 /**
2841 * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected
2842 * @irq: interrupt number
2843 * @_di: pointer to the ab8500_charger structure
2844 *
2845 * Returns IRQ status(IRQ_HANDLED)
2846 */
2847 static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di)
2848 {
2849 struct ab8500_charger *di = _di;
2850
2851 dev_dbg(di->dev, "Not allowed USB charger detected\n");
2852 queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0);
2853
2854 return IRQ_HANDLED;
2855 }
2856
2857 /**
2858 * ab8500_charger_chwdexp_handler() - Charger watchdog expired
2859 * @irq: interrupt number
2860 * @_di: pointer to the ab8500_charger structure
2861 *
2862 * Returns IRQ status(IRQ_HANDLED)
2863 */
2864 static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di)
2865 {
2866 struct ab8500_charger *di = _di;
2867
2868 dev_dbg(di->dev, "Charger watchdog expired\n");
2869
2870 /*
2871 * The charger that was online when the watchdog expired
2872 * needs to be restarted for charging to start again
2873 */
2874 if (di->ac.charger_online) {
2875 di->ac.wd_expired = true;
2876 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2877 }
2878 if (di->usb.charger_online) {
2879 di->usb.wd_expired = true;
2880 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2881 }
2882
2883 return IRQ_HANDLED;
2884 }
2885
2886 /**
2887 * ab8500_charger_vbuschdropend_handler() - VBUS drop removed
2888 * @irq: interrupt number
2889 * @_di: pointer to the ab8500_charger structure
2890 *
2891 * Returns IRQ status(IRQ_HANDLED)
2892 */
2893 static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di)
2894 {
2895 struct ab8500_charger *di = _di;
2896
2897 dev_dbg(di->dev, "VBUS charger drop ended\n");
2898 di->flags.vbus_drop_end = true;
2899
2900 /*
2901 * VBUS might have dropped due to bad connection.
2902 * Schedule a new input limit set to the value SW requests.
2903 */
2904 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work,
2905 round_jiffies(VBUS_IN_CURR_LIM_RETRY_SET_TIME * HZ));
2906
2907 return IRQ_HANDLED;
2908 }
2909
2910 /**
2911 * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected
2912 * @irq: interrupt number
2913 * @_di: pointer to the ab8500_charger structure
2914 *
2915 * Returns IRQ status(IRQ_HANDLED)
2916 */
2917 static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di)
2918 {
2919 struct ab8500_charger *di = _di;
2920
2921 dev_dbg(di->dev, "VBUS overvoltage detected\n");
2922 di->flags.vbus_ovv = true;
2923 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2924
2925 /* Schedule a new HW failure check */
2926 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2927
2928 return IRQ_HANDLED;
2929 }
2930
2931 /**
2932 * ab8500_charger_ac_get_property() - get the ac/mains properties
2933 * @psy: pointer to the power_supply structure
2934 * @psp: pointer to the power_supply_property structure
2935 * @val: pointer to the power_supply_propval union
2936 *
2937 * This function gets called when an application tries to get the ac/mains
2938 * properties by reading the sysfs files.
2939 * AC/Mains properties are online, present and voltage.
2940 * online: ac/mains charging is in progress or not
2941 * present: presence of the ac/mains
2942 * voltage: AC/Mains voltage
2943 * Returns error code in case of failure else 0(on success)
2944 */
2945 static int ab8500_charger_ac_get_property(struct power_supply *psy,
2946 enum power_supply_property psp,
2947 union power_supply_propval *val)
2948 {
2949 struct ab8500_charger *di;
2950 int ret;
2951
2952 di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy));
2953
2954 switch (psp) {
2955 case POWER_SUPPLY_PROP_HEALTH:
2956 if (di->flags.mainextchnotok)
2957 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2958 else if (di->ac.wd_expired || di->usb.wd_expired)
2959 val->intval = POWER_SUPPLY_HEALTH_DEAD;
2960 else if (di->flags.main_thermal_prot)
2961 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2962 else
2963 val->intval = POWER_SUPPLY_HEALTH_GOOD;
2964 break;
2965 case POWER_SUPPLY_PROP_ONLINE:
2966 val->intval = di->ac.charger_online;
2967 break;
2968 case POWER_SUPPLY_PROP_PRESENT:
2969 val->intval = di->ac.charger_connected;
2970 break;
2971 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2972 ret = ab8500_charger_get_ac_voltage(di);
2973 if (ret >= 0)
2974 di->ac.charger_voltage = ret;
2975 /* On error, use previous value */
2976 val->intval = di->ac.charger_voltage * 1000;
2977 break;
2978 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2979 /*
2980 * This property is used to indicate when CV mode is entered
2981 * for the AC charger
2982 */
2983 di->ac.cv_active = ab8500_charger_ac_cv(di);
2984 val->intval = di->ac.cv_active;
2985 break;
2986 case POWER_SUPPLY_PROP_CURRENT_NOW:
2987 ret = ab8500_charger_get_ac_current(di);
2988 if (ret >= 0)
2989 di->ac.charger_current = ret;
2990 val->intval = di->ac.charger_current * 1000;
2991 break;
2992 default:
2993 return -EINVAL;
2994 }
2995 return 0;
2996 }
2997
2998 /**
2999 * ab8500_charger_usb_get_property() - get the usb properties
3000 * @psy: pointer to the power_supply structure
3001 * @psp: pointer to the power_supply_property structure
3002 * @val: pointer to the power_supply_propval union
3003 *
3004 * This function gets called when an application tries to get the usb
3005 * properties by reading the sysfs files.
3006 * USB properties are online, present and voltage.
3007 * online: usb charging is in progress or not
3008 * present: presence of the usb
3009 * voltage: vbus voltage
3010 * Returns error code in case of failure else 0(on success)
3011 */
3012 static int ab8500_charger_usb_get_property(struct power_supply *psy,
3013 enum power_supply_property psp,
3014 union power_supply_propval *val)
3015 {
3016 struct ab8500_charger *di;
3017 int ret;
3018
3019 di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy));
3020
3021 switch (psp) {
3022 case POWER_SUPPLY_PROP_HEALTH:
3023 if (di->flags.usbchargernotok)
3024 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
3025 else if (di->ac.wd_expired || di->usb.wd_expired)
3026 val->intval = POWER_SUPPLY_HEALTH_DEAD;
3027 else if (di->flags.usb_thermal_prot)
3028 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
3029 else if (di->flags.vbus_ovv)
3030 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
3031 else
3032 val->intval = POWER_SUPPLY_HEALTH_GOOD;
3033 break;
3034 case POWER_SUPPLY_PROP_ONLINE:
3035 val->intval = di->usb.charger_online;
3036 break;
3037 case POWER_SUPPLY_PROP_PRESENT:
3038 val->intval = di->usb.charger_connected;
3039 break;
3040 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
3041 ret = ab8500_charger_get_vbus_voltage(di);
3042 if (ret >= 0)
3043 di->usb.charger_voltage = ret;
3044 val->intval = di->usb.charger_voltage * 1000;
3045 break;
3046 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
3047 /*
3048 * This property is used to indicate when CV mode is entered
3049 * for the USB charger
3050 */
3051 di->usb.cv_active = ab8500_charger_usb_cv(di);
3052 val->intval = di->usb.cv_active;
3053 break;
3054 case POWER_SUPPLY_PROP_CURRENT_NOW:
3055 ret = ab8500_charger_get_usb_current(di);
3056 if (ret >= 0)
3057 di->usb.charger_current = ret;
3058 val->intval = di->usb.charger_current * 1000;
3059 break;
3060 case POWER_SUPPLY_PROP_CURRENT_AVG:
3061 /*
3062 * This property is used to indicate when VBUS has collapsed
3063 * due to too high output current from the USB charger
3064 */
3065 if (di->flags.vbus_collapse)
3066 val->intval = 1;
3067 else
3068 val->intval = 0;
3069 break;
3070 default:
3071 return -EINVAL;
3072 }
3073 return 0;
3074 }
3075
3076 /**
3077 * ab8500_charger_init_hw_registers() - Set up charger related registers
3078 * @di: pointer to the ab8500_charger structure
3079 *
3080 * Set up charger OVV, watchdog and maximum voltage registers as well as
3081 * charging of the backup battery
3082 */
3083 static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
3084 {
3085 int ret = 0;
3086 u8 bup_vch_range = 0, vbup33_vrtcn = 0;
3087
3088 /* Setup maximum charger current and voltage for ABB cut2.0 */
3089 if (!is_ab8500_1p1_or_earlier(di->parent)) {
3090 ret = abx500_set_register_interruptible(di->dev,
3091 AB8500_CHARGER,
3092 AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6);
3093 if (ret) {
3094 dev_err(di->dev,
3095 "failed to set CH_VOLT_LVL_MAX_REG\n");
3096 goto out;
3097 }
3098
3099 if (is_ab8540(di->parent))
3100 ret = abx500_set_register_interruptible(di->dev,
3101 AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
3102 CH_OP_CUR_LVL_2P);
3103 else
3104 ret = abx500_set_register_interruptible(di->dev,
3105 AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
3106 CH_OP_CUR_LVL_1P6);
3107 if (ret) {
3108 dev_err(di->dev,
3109 "failed to set CH_OPT_CRNTLVL_MAX_REG\n");
3110 goto out;
3111 }
3112 }
3113
3114 if (is_ab9540_2p0(di->parent) || is_ab9540_3p0(di->parent)
3115 || is_ab8505_2p0(di->parent) || is_ab8540(di->parent))
3116 ret = abx500_mask_and_set_register_interruptible(di->dev,
3117 AB8500_CHARGER,
3118 AB8500_USBCH_CTRL2_REG,
3119 VBUS_AUTO_IN_CURR_LIM_ENA,
3120 VBUS_AUTO_IN_CURR_LIM_ENA);
3121 else
3122 /*
3123 * VBUS OVV set to 6.3V and enable automatic current limitation
3124 */
3125 ret = abx500_set_register_interruptible(di->dev,
3126 AB8500_CHARGER,
3127 AB8500_USBCH_CTRL2_REG,
3128 VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA);
3129 if (ret) {
3130 dev_err(di->dev,
3131 "failed to set automatic current limitation\n");
3132 goto out;
3133 }
3134
3135 /* Enable main watchdog in OTP */
3136 ret = abx500_set_register_interruptible(di->dev,
3137 AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD);
3138 if (ret) {
3139 dev_err(di->dev, "failed to enable main WD in OTP\n");
3140 goto out;
3141 }
3142
3143 /* Enable main watchdog */
3144 ret = abx500_set_register_interruptible(di->dev,
3145 AB8500_SYS_CTRL2_BLOCK,
3146 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA);
3147 if (ret) {
3148 dev_err(di->dev, "faile to enable main watchdog\n");
3149 goto out;
3150 }
3151
3152 /*
3153 * Due to internal synchronisation, Enable and Kick watchdog bits
3154 * cannot be enabled in a single write.
3155 * A minimum delay of 2*32 kHz period (62.5µs) must be inserted
3156 * between writing Enable then Kick bits.
3157 */
3158 udelay(63);
3159
3160 /* Kick main watchdog */
3161 ret = abx500_set_register_interruptible(di->dev,
3162 AB8500_SYS_CTRL2_BLOCK,
3163 AB8500_MAIN_WDOG_CTRL_REG,
3164 (MAIN_WDOG_ENA | MAIN_WDOG_KICK));
3165 if (ret) {
3166 dev_err(di->dev, "failed to kick main watchdog\n");
3167 goto out;
3168 }
3169
3170 /* Disable main watchdog */
3171 ret = abx500_set_register_interruptible(di->dev,
3172 AB8500_SYS_CTRL2_BLOCK,
3173 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS);
3174 if (ret) {
3175 dev_err(di->dev, "failed to disable main watchdog\n");
3176 goto out;
3177 }
3178
3179 /* Set watchdog timeout */
3180 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3181 AB8500_CH_WD_TIMER_REG, WD_TIMER);
3182 if (ret) {
3183 dev_err(di->dev, "failed to set charger watchdog timeout\n");
3184 goto out;
3185 }
3186
3187 ret = ab8500_charger_led_en(di, false);
3188 if (ret < 0) {
3189 dev_err(di->dev, "failed to disable LED\n");
3190 goto out;
3191 }
3192
3193 /* Backup battery voltage and current */
3194 if (di->bm->bkup_bat_v > BUP_VCH_SEL_3P1V)
3195 bup_vch_range = BUP_VCH_RANGE;
3196 if (di->bm->bkup_bat_v == BUP_VCH_SEL_3P3V)
3197 vbup33_vrtcn = VBUP33_VRTCN;
3198
3199 ret = abx500_set_register_interruptible(di->dev,
3200 AB8500_RTC,
3201 AB8500_RTC_BACKUP_CHG_REG,
3202 (di->bm->bkup_bat_v & 0x3) | di->bm->bkup_bat_i);
3203 if (ret) {
3204 dev_err(di->dev, "failed to setup backup battery charging\n");
3205 goto out;
3206 }
3207 if (is_ab8540(di->parent)) {
3208 ret = abx500_set_register_interruptible(di->dev,
3209 AB8500_RTC,
3210 AB8500_RTC_CTRL1_REG,
3211 bup_vch_range | vbup33_vrtcn);
3212 if (ret) {
3213 dev_err(di->dev,
3214 "failed to setup backup battery charging\n");
3215 goto out;
3216 }
3217 }
3218
3219 /* Enable backup battery charging */
3220 abx500_mask_and_set_register_interruptible(di->dev,
3221 AB8500_RTC, AB8500_RTC_CTRL_REG,
3222 RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
3223 if (ret < 0)
3224 dev_err(di->dev, "%s mask and set failed\n", __func__);
3225
3226 if (is_ab8540(di->parent)) {
3227 ret = abx500_mask_and_set_register_interruptible(di->dev,
3228 AB8500_CHARGER, AB8540_USB_PP_MODE_REG,
3229 BUS_VSYS_VOL_SELECT_MASK, BUS_VSYS_VOL_SELECT_3P6V);
3230 if (ret) {
3231 dev_err(di->dev,
3232 "failed to setup usb power path vsys voltage\n");
3233 goto out;
3234 }
3235 ret = abx500_mask_and_set_register_interruptible(di->dev,
3236 AB8500_CHARGER, AB8540_USB_PP_CHR_REG,
3237 BUS_PP_PRECHG_CURRENT_MASK, 0);
3238 if (ret) {
3239 dev_err(di->dev,
3240 "failed to setup usb power path prechage current\n");
3241 goto out;
3242 }
3243 }
3244
3245 out:
3246 return ret;
3247 }
3248
3249 /*
3250 * ab8500 charger driver interrupts and their respective isr
3251 */
3252 static struct ab8500_charger_interrupts ab8500_charger_irq[] = {
3253 {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler},
3254 {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler},
3255 {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler},
3256 {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler},
3257 {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler},
3258 {"VBUS_DET_F", ab8500_charger_vbusdetf_handler},
3259 {"VBUS_DET_R", ab8500_charger_vbusdetr_handler},
3260 {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler},
3261 {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler},
3262 {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler},
3263 {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler},
3264 {"VBUS_OVV", ab8500_charger_vbusovv_handler},
3265 {"CH_WD_EXP", ab8500_charger_chwdexp_handler},
3266 {"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler},
3267 };
3268
3269 static int ab8500_charger_usb_notifier_call(struct notifier_block *nb,
3270 unsigned long event, void *power)
3271 {
3272 struct ab8500_charger *di =
3273 container_of(nb, struct ab8500_charger, nb);
3274 enum ab8500_usb_state bm_usb_state;
3275 unsigned mA = *((unsigned *)power);
3276
3277 if (!di)
3278 return NOTIFY_DONE;
3279
3280 if (event != USB_EVENT_VBUS) {
3281 dev_dbg(di->dev, "not a standard host, returning\n");
3282 return NOTIFY_DONE;
3283 }
3284
3285 /* TODO: State is fabricate here. See if charger really needs USB
3286 * state or if mA is enough
3287 */
3288 if ((di->usb_state.usb_current == 2) && (mA > 2))
3289 bm_usb_state = AB8500_BM_USB_STATE_RESUME;
3290 else if (mA == 0)
3291 bm_usb_state = AB8500_BM_USB_STATE_RESET_HS;
3292 else if (mA == 2)
3293 bm_usb_state = AB8500_BM_USB_STATE_SUSPEND;
3294 else if (mA >= 8) /* 8, 100, 500 */
3295 bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED;
3296 else /* Should never occur */
3297 bm_usb_state = AB8500_BM_USB_STATE_RESET_FS;
3298
3299 dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n",
3300 __func__, bm_usb_state, mA);
3301
3302 spin_lock(&di->usb_state.usb_lock);
3303 di->usb_state.state_tmp = bm_usb_state;
3304 di->usb_state.usb_current_tmp = mA;
3305 spin_unlock(&di->usb_state.usb_lock);
3306
3307 /*
3308 * wait for some time until you get updates from the usb stack
3309 * and negotiations are completed
3310 */
3311 queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2);
3312
3313 return NOTIFY_OK;
3314 }
3315
3316 #if defined(CONFIG_PM)
3317 static int ab8500_charger_resume(struct platform_device *pdev)
3318 {
3319 int ret;
3320 struct ab8500_charger *di = platform_get_drvdata(pdev);
3321
3322 /*
3323 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3324 * logic. That means we have to continously kick the charger
3325 * watchdog even when no charger is connected. This is only
3326 * valid once the AC charger has been enabled. This is
3327 * a bug that is not handled by the algorithm and the
3328 * watchdog have to be kicked by the charger driver
3329 * when the AC charger is disabled
3330 */
3331 if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) {
3332 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3333 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
3334 if (ret)
3335 dev_err(di->dev, "Failed to kick WD!\n");
3336
3337 /* If not already pending start a new timer */
3338 queue_delayed_work(di->charger_wq, &di->kick_wd_work,
3339 round_jiffies(WD_KICK_INTERVAL));
3340 }
3341
3342 /* If we still have a HW failure, schedule a new check */
3343 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
3344 queue_delayed_work(di->charger_wq,
3345 &di->check_hw_failure_work, 0);
3346 }
3347
3348 if (di->flags.vbus_drop_end)
3349 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0);
3350
3351 return 0;
3352 }
3353
3354 static int ab8500_charger_suspend(struct platform_device *pdev,
3355 pm_message_t state)
3356 {
3357 struct ab8500_charger *di = platform_get_drvdata(pdev);
3358
3359 /* Cancel any pending jobs */
3360 cancel_delayed_work(&di->check_hw_failure_work);
3361 cancel_delayed_work(&di->vbus_drop_end_work);
3362
3363 flush_delayed_work(&di->attach_work);
3364 flush_delayed_work(&di->usb_charger_attached_work);
3365 flush_delayed_work(&di->ac_charger_attached_work);
3366 flush_delayed_work(&di->check_usbchgnotok_work);
3367 flush_delayed_work(&di->check_vbat_work);
3368 flush_delayed_work(&di->kick_wd_work);
3369
3370 flush_work(&di->usb_link_status_work);
3371 flush_work(&di->ac_work);
3372 flush_work(&di->detect_usb_type_work);
3373
3374 if (atomic_read(&di->current_stepping_sessions))
3375 return -EAGAIN;
3376
3377 return 0;
3378 }
3379 #else
3380 #define ab8500_charger_suspend NULL
3381 #define ab8500_charger_resume NULL
3382 #endif
3383
3384 static struct notifier_block charger_nb = {
3385 .notifier_call = ab8500_external_charger_prepare,
3386 };
3387
3388 static int ab8500_charger_remove(struct platform_device *pdev)
3389 {
3390 struct ab8500_charger *di = platform_get_drvdata(pdev);
3391 int i, irq, ret;
3392
3393 /* Disable AC charging */
3394 ab8500_charger_ac_en(&di->ac_chg, false, 0, 0);
3395
3396 /* Disable USB charging */
3397 ab8500_charger_usb_en(&di->usb_chg, false, 0, 0);
3398
3399 /* Disable interrupts */
3400 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
3401 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3402 free_irq(irq, di);
3403 }
3404
3405 /* Backup battery voltage and current disable */
3406 ret = abx500_mask_and_set_register_interruptible(di->dev,
3407 AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0);
3408 if (ret < 0)
3409 dev_err(di->dev, "%s mask and set failed\n", __func__);
3410
3411 usb_unregister_notifier(di->usb_phy, &di->nb);
3412 usb_put_phy(di->usb_phy);
3413
3414 /* Delete the work queue */
3415 destroy_workqueue(di->charger_wq);
3416
3417 /* Unregister external charger enable notifier */
3418 if (!di->ac_chg.enabled)
3419 blocking_notifier_chain_unregister(
3420 &charger_notifier_list, &charger_nb);
3421
3422 flush_scheduled_work();
3423 if (di->usb_chg.enabled)
3424 power_supply_unregister(&di->usb_chg.psy);
3425
3426 if (di->ac_chg.enabled && !di->ac_chg.external)
3427 power_supply_unregister(&di->ac_chg.psy);
3428
3429 return 0;
3430 }
3431
3432 static char *supply_interface[] = {
3433 "ab8500_chargalg",
3434 "ab8500_fg",
3435 "ab8500_btemp",
3436 };
3437
3438 static int ab8500_charger_probe(struct platform_device *pdev)
3439 {
3440 struct device_node *np = pdev->dev.of_node;
3441 struct abx500_bm_data *plat = pdev->dev.platform_data;
3442 struct ab8500_charger *di;
3443 int irq, i, charger_status, ret = 0, ch_stat;
3444
3445 di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
3446 if (!di) {
3447 dev_err(&pdev->dev, "%s no mem for ab8500_charger\n", __func__);
3448 return -ENOMEM;
3449 }
3450
3451 if (!plat) {
3452 dev_err(&pdev->dev, "no battery management data supplied\n");
3453 return -EINVAL;
3454 }
3455 di->bm = plat;
3456
3457 if (np) {
3458 ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm);
3459 if (ret) {
3460 dev_err(&pdev->dev, "failed to get battery information\n");
3461 return ret;
3462 }
3463 di->autopower_cfg = of_property_read_bool(np, "autopower_cfg");
3464 } else
3465 di->autopower_cfg = false;
3466
3467 /* get parent data */
3468 di->dev = &pdev->dev;
3469 di->parent = dev_get_drvdata(pdev->dev.parent);
3470 di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
3471
3472 /* initialize lock */
3473 spin_lock_init(&di->usb_state.usb_lock);
3474 mutex_init(&di->usb_ipt_crnt_lock);
3475
3476 di->autopower = false;
3477 di->invalid_charger_detect_state = 0;
3478
3479 /* AC supply */
3480 /* power_supply base class */
3481 di->ac_chg.psy.name = "ab8500_ac";
3482 di->ac_chg.psy.type = POWER_SUPPLY_TYPE_MAINS;
3483 di->ac_chg.psy.properties = ab8500_charger_ac_props;
3484 di->ac_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_ac_props);
3485 di->ac_chg.psy.get_property = ab8500_charger_ac_get_property;
3486 di->ac_chg.psy.supplied_to = supply_interface;
3487 di->ac_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface),
3488 /* ux500_charger sub-class */
3489 di->ac_chg.ops.enable = &ab8500_charger_ac_en;
3490 di->ac_chg.ops.check_enable = &ab8500_charger_ac_check_enable;
3491 di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3492 di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3493 di->ac_chg.max_out_volt = ab8500_charger_voltage_map[
3494 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3495 di->ac_chg.max_out_curr =
3496 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3497 di->ac_chg.wdt_refresh = CHG_WD_INTERVAL;
3498 di->ac_chg.enabled = di->bm->ac_enabled;
3499 di->ac_chg.external = false;
3500
3501 /*notifier for external charger enabling*/
3502 if (!di->ac_chg.enabled)
3503 blocking_notifier_chain_register(
3504 &charger_notifier_list, &charger_nb);
3505
3506 /* USB supply */
3507 /* power_supply base class */
3508 di->usb_chg.psy.name = "ab8500_usb";
3509 di->usb_chg.psy.type = POWER_SUPPLY_TYPE_USB;
3510 di->usb_chg.psy.properties = ab8500_charger_usb_props;
3511 di->usb_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_usb_props);
3512 di->usb_chg.psy.get_property = ab8500_charger_usb_get_property;
3513 di->usb_chg.psy.supplied_to = supply_interface;
3514 di->usb_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface),
3515 /* ux500_charger sub-class */
3516 di->usb_chg.ops.enable = &ab8500_charger_usb_en;
3517 di->usb_chg.ops.check_enable = &ab8500_charger_usb_check_enable;
3518 di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3519 di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3520 di->usb_chg.ops.pp_enable = &ab8540_charger_power_path_enable;
3521 di->usb_chg.ops.pre_chg_enable = &ab8540_charger_usb_pre_chg_enable;
3522 di->usb_chg.max_out_volt = ab8500_charger_voltage_map[
3523 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3524 di->usb_chg.max_out_curr =
3525 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3526 di->usb_chg.wdt_refresh = CHG_WD_INTERVAL;
3527 di->usb_chg.enabled = di->bm->usb_enabled;
3528 di->usb_chg.external = false;
3529 di->usb_chg.power_path = di->bm->usb_power_path;
3530 di->usb_state.usb_current = -1;
3531
3532 /* Create a work queue for the charger */
3533 di->charger_wq =
3534 create_singlethread_workqueue("ab8500_charger_wq");
3535 if (di->charger_wq == NULL) {
3536 dev_err(di->dev, "failed to create work queue\n");
3537 return -ENOMEM;
3538 }
3539
3540 mutex_init(&di->charger_attached_mutex);
3541
3542 /* Init work for HW failure check */
3543 INIT_DEFERRABLE_WORK(&di->check_hw_failure_work,
3544 ab8500_charger_check_hw_failure_work);
3545 INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work,
3546 ab8500_charger_check_usbchargernotok_work);
3547
3548 INIT_DELAYED_WORK(&di->ac_charger_attached_work,
3549 ab8500_charger_ac_attached_work);
3550 INIT_DELAYED_WORK(&di->usb_charger_attached_work,
3551 ab8500_charger_usb_attached_work);
3552
3553 /*
3554 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3555 * logic. That means we have to continously kick the charger
3556 * watchdog even when no charger is connected. This is only
3557 * valid once the AC charger has been enabled. This is
3558 * a bug that is not handled by the algorithm and the
3559 * watchdog have to be kicked by the charger driver
3560 * when the AC charger is disabled
3561 */
3562 INIT_DEFERRABLE_WORK(&di->kick_wd_work,
3563 ab8500_charger_kick_watchdog_work);
3564
3565 INIT_DEFERRABLE_WORK(&di->check_vbat_work,
3566 ab8500_charger_check_vbat_work);
3567
3568 INIT_DELAYED_WORK(&di->attach_work,
3569 ab8500_charger_usb_link_attach_work);
3570
3571 INIT_DELAYED_WORK(&di->usb_state_changed_work,
3572 ab8500_charger_usb_state_changed_work);
3573
3574 INIT_DELAYED_WORK(&di->vbus_drop_end_work,
3575 ab8500_charger_vbus_drop_end_work);
3576
3577 /* Init work for charger detection */
3578 INIT_WORK(&di->usb_link_status_work,
3579 ab8500_charger_usb_link_status_work);
3580 INIT_WORK(&di->ac_work, ab8500_charger_ac_work);
3581 INIT_WORK(&di->detect_usb_type_work,
3582 ab8500_charger_detect_usb_type_work);
3583
3584 /* Init work for checking HW status */
3585 INIT_WORK(&di->check_main_thermal_prot_work,
3586 ab8500_charger_check_main_thermal_prot_work);
3587 INIT_WORK(&di->check_usb_thermal_prot_work,
3588 ab8500_charger_check_usb_thermal_prot_work);
3589
3590 /*
3591 * VDD ADC supply needs to be enabled from this driver when there
3592 * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
3593 * interrupts during charging
3594 */
3595 di->regu = devm_regulator_get(di->dev, "vddadc");
3596 if (IS_ERR(di->regu)) {
3597 ret = PTR_ERR(di->regu);
3598 dev_err(di->dev, "failed to get vddadc regulator\n");
3599 goto free_charger_wq;
3600 }
3601
3602
3603 /* Initialize OVV, and other registers */
3604 ret = ab8500_charger_init_hw_registers(di);
3605 if (ret) {
3606 dev_err(di->dev, "failed to initialize ABB registers\n");
3607 goto free_charger_wq;
3608 }
3609
3610 /* Register AC charger class */
3611 if (di->ac_chg.enabled) {
3612 ret = power_supply_register(di->dev, &di->ac_chg.psy);
3613 if (ret) {
3614 dev_err(di->dev, "failed to register AC charger\n");
3615 goto free_charger_wq;
3616 }
3617 }
3618
3619 /* Register USB charger class */
3620 if (di->usb_chg.enabled) {
3621 ret = power_supply_register(di->dev, &di->usb_chg.psy);
3622 if (ret) {
3623 dev_err(di->dev, "failed to register USB charger\n");
3624 goto free_ac;
3625 }
3626 }
3627
3628 di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
3629 if (IS_ERR_OR_NULL(di->usb_phy)) {
3630 dev_err(di->dev, "failed to get usb transceiver\n");
3631 ret = -EINVAL;
3632 goto free_usb;
3633 }
3634 di->nb.notifier_call = ab8500_charger_usb_notifier_call;
3635 ret = usb_register_notifier(di->usb_phy, &di->nb);
3636 if (ret) {
3637 dev_err(di->dev, "failed to register usb notifier\n");
3638 goto put_usb_phy;
3639 }
3640
3641 /* Identify the connected charger types during startup */
3642 charger_status = ab8500_charger_detect_chargers(di, true);
3643 if (charger_status & AC_PW_CONN) {
3644 di->ac.charger_connected = 1;
3645 di->ac_conn = true;
3646 ab8500_power_supply_changed(di, &di->ac_chg.psy);
3647 sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present");
3648 }
3649
3650 if (charger_status & USB_PW_CONN) {
3651 di->vbus_detected = true;
3652 di->vbus_detected_start = true;
3653 queue_work(di->charger_wq,
3654 &di->detect_usb_type_work);
3655 }
3656
3657 /* Register interrupts */
3658 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
3659 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3660 ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr,
3661 IRQF_SHARED | IRQF_NO_SUSPEND,
3662 ab8500_charger_irq[i].name, di);
3663
3664 if (ret != 0) {
3665 dev_err(di->dev, "failed to request %s IRQ %d: %d\n"
3666 , ab8500_charger_irq[i].name, irq, ret);
3667 goto free_irq;
3668 }
3669 dev_dbg(di->dev, "Requested %s IRQ %d: %d\n",
3670 ab8500_charger_irq[i].name, irq, ret);
3671 }
3672
3673 platform_set_drvdata(pdev, di);
3674
3675 mutex_lock(&di->charger_attached_mutex);
3676
3677 ch_stat = ab8500_charger_detect_chargers(di, false);
3678
3679 if ((ch_stat & AC_PW_CONN) == AC_PW_CONN) {
3680 if (is_ab8500(di->parent))
3681 queue_delayed_work(di->charger_wq,
3682 &di->ac_charger_attached_work,
3683 HZ);
3684 }
3685 if ((ch_stat & USB_PW_CONN) == USB_PW_CONN) {
3686 if (is_ab8500(di->parent))
3687 queue_delayed_work(di->charger_wq,
3688 &di->usb_charger_attached_work,
3689 HZ);
3690 }
3691
3692 mutex_unlock(&di->charger_attached_mutex);
3693
3694 return ret;
3695
3696 free_irq:
3697 usb_unregister_notifier(di->usb_phy, &di->nb);
3698
3699 /* We also have to free all successfully registered irqs */
3700 for (i = i - 1; i >= 0; i--) {
3701 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3702 free_irq(irq, di);
3703 }
3704 put_usb_phy:
3705 usb_put_phy(di->usb_phy);
3706 free_usb:
3707 if (di->usb_chg.enabled)
3708 power_supply_unregister(&di->usb_chg.psy);
3709 free_ac:
3710 if (di->ac_chg.enabled)
3711 power_supply_unregister(&di->ac_chg.psy);
3712 free_charger_wq:
3713 destroy_workqueue(di->charger_wq);
3714 return ret;
3715 }
3716
3717 static const struct of_device_id ab8500_charger_match[] = {
3718 { .compatible = "stericsson,ab8500-charger", },
3719 { },
3720 };
3721
3722 static struct platform_driver ab8500_charger_driver = {
3723 .probe = ab8500_charger_probe,
3724 .remove = ab8500_charger_remove,
3725 .suspend = ab8500_charger_suspend,
3726 .resume = ab8500_charger_resume,
3727 .driver = {
3728 .name = "ab8500-charger",
3729 .owner = THIS_MODULE,
3730 .of_match_table = ab8500_charger_match,
3731 },
3732 };
3733
3734 static int __init ab8500_charger_init(void)
3735 {
3736 return platform_driver_register(&ab8500_charger_driver);
3737 }
3738
3739 static void __exit ab8500_charger_exit(void)
3740 {
3741 platform_driver_unregister(&ab8500_charger_driver);
3742 }
3743
3744 subsys_initcall_sync(ab8500_charger_init);
3745 module_exit(ab8500_charger_exit);
3746
3747 MODULE_LICENSE("GPL v2");
3748 MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
3749 MODULE_ALIAS("platform:ab8500-charger");
3750 MODULE_DESCRIPTION("AB8500 charger management driver");
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