?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
WIP FPC-III support
[linux/fpc-iii.git] / drivers / power / supply / ab8500_charger.c
blobac77c8882d17a0e306088a9f88cfe8c155cf7ea7
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) ST-Ericsson SA 2012
4 *
5 * Charger driver for AB8500
6 *
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/ux500_chargalg.h>
33 #include <linux/usb/otg.h>
34 #include <linux/mutex.h>
35 #include <linux/iio/consumer.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 AUTO_VBUS_IN_CURR_LIM_SHIFT 4
62 #define VBUS_IN_CURR_LIM_RETRY_SET_TIME 30 /* seconds */
63
64 #define LED_INDICATOR_PWM_ENA 0x01
65 #define LED_INDICATOR_PWM_DIS 0x00
66 #define LED_IND_CUR_5MA 0x04
67 #define LED_INDICATOR_PWM_DUTY_252_256 0xBF
68
69 /* HW failure constants */
70 #define MAIN_CH_TH_PROT 0x02
71 #define VBUS_CH_NOK 0x08
72 #define USB_CH_TH_PROT 0x02
73 #define VBUS_OVV_TH 0x01
74 #define MAIN_CH_NOK 0x01
75 #define VBUS_DET 0x80
76
77 #define MAIN_CH_STATUS2_MAINCHGDROP 0x80
78 #define MAIN_CH_STATUS2_MAINCHARGERDETDBNC 0x40
79 #define USB_CH_VBUSDROP 0x40
80 #define USB_CH_VBUSDETDBNC 0x01
81
82 /* UsbLineStatus register bit masks */
83 #define AB8500_USB_LINK_STATUS 0x78
84 #define AB8505_USB_LINK_STATUS 0xF8
85 #define AB8500_STD_HOST_SUSP 0x18
86 #define USB_LINK_STATUS_SHIFT 3
87
88 /* Watchdog timeout constant */
89 #define WD_TIMER 0x30 /* 4min */
90 #define WD_KICK_INTERVAL (60 * HZ)
91
92 /* Lowest charger voltage is 3.39V -> 0x4E */
93 #define LOW_VOLT_REG 0x4E
94
95 /* Step up/down delay in us */
96 #define STEP_UDELAY 1000
97
98 #define CHARGER_STATUS_POLL 10 /* in ms */
99
100 #define CHG_WD_INTERVAL (60 * HZ)
101
102 #define AB8500_SW_CONTROL_FALLBACK 0x03
103 /* Wait for enumeration before charing in us */
104 #define WAIT_ACA_RID_ENUMERATION (5 * 1000)
105 /*External charger control*/
106 #define AB8500_SYS_CHARGER_CONTROL_REG 0x52
107 #define EXTERNAL_CHARGER_DISABLE_REG_VAL 0x03
108 #define EXTERNAL_CHARGER_ENABLE_REG_VAL 0x07
109
110 /* UsbLineStatus register - usb types */
111 enum ab8500_charger_link_status {
112 USB_STAT_NOT_CONFIGURED,
113 USB_STAT_STD_HOST_NC,
114 USB_STAT_STD_HOST_C_NS,
115 USB_STAT_STD_HOST_C_S,
116 USB_STAT_HOST_CHG_NM,
117 USB_STAT_HOST_CHG_HS,
118 USB_STAT_HOST_CHG_HS_CHIRP,
119 USB_STAT_DEDICATED_CHG,
120 USB_STAT_ACA_RID_A,
121 USB_STAT_ACA_RID_B,
122 USB_STAT_ACA_RID_C_NM,
123 USB_STAT_ACA_RID_C_HS,
124 USB_STAT_ACA_RID_C_HS_CHIRP,
125 USB_STAT_HM_IDGND,
126 USB_STAT_RESERVED,
127 USB_STAT_NOT_VALID_LINK,
128 USB_STAT_PHY_EN,
129 USB_STAT_SUP_NO_IDGND_VBUS,
130 USB_STAT_SUP_IDGND_VBUS,
131 USB_STAT_CHARGER_LINE_1,
132 USB_STAT_CARKIT_1,
133 USB_STAT_CARKIT_2,
134 USB_STAT_ACA_DOCK_CHARGER,
135 };
136
137 enum ab8500_usb_state {
138 AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */
139 AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */
140 AB8500_BM_USB_STATE_CONFIGURED,
141 AB8500_BM_USB_STATE_SUSPEND,
142 AB8500_BM_USB_STATE_RESUME,
143 AB8500_BM_USB_STATE_MAX,
144 };
145
146 /* VBUS input current limits supported in AB8500 in mA */
147 #define USB_CH_IP_CUR_LVL_0P05 50
148 #define USB_CH_IP_CUR_LVL_0P09 98
149 #define USB_CH_IP_CUR_LVL_0P19 193
150 #define USB_CH_IP_CUR_LVL_0P29 290
151 #define USB_CH_IP_CUR_LVL_0P38 380
152 #define USB_CH_IP_CUR_LVL_0P45 450
153 #define USB_CH_IP_CUR_LVL_0P5 500
154 #define USB_CH_IP_CUR_LVL_0P6 600
155 #define USB_CH_IP_CUR_LVL_0P7 700
156 #define USB_CH_IP_CUR_LVL_0P8 800
157 #define USB_CH_IP_CUR_LVL_0P9 900
158 #define USB_CH_IP_CUR_LVL_1P0 1000
159 #define USB_CH_IP_CUR_LVL_1P1 1100
160 #define USB_CH_IP_CUR_LVL_1P3 1300
161 #define USB_CH_IP_CUR_LVL_1P4 1400
162 #define USB_CH_IP_CUR_LVL_1P5 1500
163
164 #define VBAT_TRESH_IP_CUR_RED 3800
165
166 #define to_ab8500_charger_usb_device_info(x) container_of((x), \
167 struct ab8500_charger, usb_chg)
168 #define to_ab8500_charger_ac_device_info(x) container_of((x), \
169 struct ab8500_charger, ac_chg)
170
171 /**
172 * struct ab8500_charger_interrupts - ab8500 interupts
173 * @name: name of the interrupt
174 * @isr function pointer to the isr
175 */
176 struct ab8500_charger_interrupts {
177 char *name;
178 irqreturn_t (*isr)(int irq, void *data);
179 };
180
181 struct ab8500_charger_info {
182 int charger_connected;
183 int charger_online;
184 int charger_voltage;
185 int cv_active;
186 bool wd_expired;
187 int charger_current;
188 };
189
190 struct ab8500_charger_event_flags {
191 bool mainextchnotok;
192 bool main_thermal_prot;
193 bool usb_thermal_prot;
194 bool vbus_ovv;
195 bool usbchargernotok;
196 bool chgwdexp;
197 bool vbus_collapse;
198 bool vbus_drop_end;
199 };
200
201 struct ab8500_charger_usb_state {
202 int usb_current;
203 int usb_current_tmp;
204 enum ab8500_usb_state state;
205 enum ab8500_usb_state state_tmp;
206 spinlock_t usb_lock;
207 };
208
209 struct ab8500_charger_max_usb_in_curr {
210 int usb_type_max;
211 int set_max;
212 int calculated_max;
213 };
214
215 /**
216 * struct ab8500_charger - ab8500 Charger device information
217 * @dev: Pointer to the structure device
218 * @vbus_detected: VBUS detected
219 * @vbus_detected_start:
220 * VBUS detected during startup
221 * @ac_conn: This will be true when the AC charger has been plugged
222 * @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC
223 * charger is enabled
224 * @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB
225 * charger is enabled
226 * @vbat Battery voltage
227 * @old_vbat Previously measured battery voltage
228 * @usb_device_is_unrecognised USB device is unrecognised by the hardware
229 * @autopower Indicate if we should have automatic pwron after pwrloss
230 * @autopower_cfg platform specific power config support for "pwron after pwrloss"
231 * @invalid_charger_detect_state State when forcing AB to use invalid charger
232 * @is_aca_rid: Incicate if accessory is ACA type
233 * @current_stepping_sessions:
234 * Counter for current stepping sessions
235 * @parent: Pointer to the struct ab8500
236 * @adc_main_charger_v ADC channel for main charger voltage
237 * @adc_main_charger_c ADC channel for main charger current
238 * @adc_vbus_v ADC channel for USB charger voltage
239 * @adc_usb_charger_c ADC channel for USB charger current
240 * @bm: Platform specific battery management information
241 * @flags: Structure for information about events triggered
242 * @usb_state: Structure for usb stack information
243 * @max_usb_in_curr: Max USB charger input current
244 * @ac_chg: AC charger power supply
245 * @usb_chg: USB charger power supply
246 * @ac: Structure that holds the AC charger properties
247 * @usb: Structure that holds the USB charger properties
248 * @regu: Pointer to the struct regulator
249 * @charger_wq: Work queue for the IRQs and checking HW state
250 * @usb_ipt_crnt_lock: Lock to protect VBUS input current setting from mutuals
251 * @pm_lock: Lock to prevent system to suspend
252 * @check_vbat_work Work for checking vbat threshold to adjust vbus current
253 * @check_hw_failure_work: Work for checking HW state
254 * @check_usbchgnotok_work: Work for checking USB charger not ok status
255 * @kick_wd_work: Work for kicking the charger watchdog in case
256 * of ABB rev 1.* due to the watchog logic bug
257 * @ac_charger_attached_work: Work for checking if AC charger is still
258 * connected
259 * @usb_charger_attached_work: Work for checking if USB charger is still
260 * connected
261 * @ac_work: Work for checking AC charger connection
262 * @detect_usb_type_work: Work for detecting the USB type connected
263 * @usb_link_status_work: Work for checking the new USB link status
264 * @usb_state_changed_work: Work for checking USB state
265 * @attach_work: Work for detecting USB type
266 * @vbus_drop_end_work: Work for detecting VBUS drop end
267 * @check_main_thermal_prot_work:
268 * Work for checking Main thermal status
269 * @check_usb_thermal_prot_work:
270 * Work for checking USB thermal status
271 * @charger_attached_mutex: For controlling the wakelock
272 */
273 struct ab8500_charger {
274 struct device *dev;
275 bool vbus_detected;
276 bool vbus_detected_start;
277 bool ac_conn;
278 bool vddadc_en_ac;
279 bool vddadc_en_usb;
280 int vbat;
281 int old_vbat;
282 bool usb_device_is_unrecognised;
283 bool autopower;
284 bool autopower_cfg;
285 int invalid_charger_detect_state;
286 int is_aca_rid;
287 atomic_t current_stepping_sessions;
288 struct ab8500 *parent;
289 struct iio_channel *adc_main_charger_v;
290 struct iio_channel *adc_main_charger_c;
291 struct iio_channel *adc_vbus_v;
292 struct iio_channel *adc_usb_charger_c;
293 struct abx500_bm_data *bm;
294 struct ab8500_charger_event_flags flags;
295 struct ab8500_charger_usb_state usb_state;
296 struct ab8500_charger_max_usb_in_curr max_usb_in_curr;
297 struct ux500_charger ac_chg;
298 struct ux500_charger usb_chg;
299 struct ab8500_charger_info ac;
300 struct ab8500_charger_info usb;
301 struct regulator *regu;
302 struct workqueue_struct *charger_wq;
303 struct mutex usb_ipt_crnt_lock;
304 struct delayed_work check_vbat_work;
305 struct delayed_work check_hw_failure_work;
306 struct delayed_work check_usbchgnotok_work;
307 struct delayed_work kick_wd_work;
308 struct delayed_work usb_state_changed_work;
309 struct delayed_work attach_work;
310 struct delayed_work ac_charger_attached_work;
311 struct delayed_work usb_charger_attached_work;
312 struct delayed_work vbus_drop_end_work;
313 struct work_struct ac_work;
314 struct work_struct detect_usb_type_work;
315 struct work_struct usb_link_status_work;
316 struct work_struct check_main_thermal_prot_work;
317 struct work_struct check_usb_thermal_prot_work;
318 struct usb_phy *usb_phy;
319 struct notifier_block nb;
320 struct mutex charger_attached_mutex;
321 };
322
323 /* AC properties */
324 static enum power_supply_property ab8500_charger_ac_props[] = {
325 POWER_SUPPLY_PROP_HEALTH,
326 POWER_SUPPLY_PROP_PRESENT,
327 POWER_SUPPLY_PROP_ONLINE,
328 POWER_SUPPLY_PROP_VOLTAGE_NOW,
329 POWER_SUPPLY_PROP_VOLTAGE_AVG,
330 POWER_SUPPLY_PROP_CURRENT_NOW,
331 };
332
333 /* USB properties */
334 static enum power_supply_property ab8500_charger_usb_props[] = {
335 POWER_SUPPLY_PROP_HEALTH,
336 POWER_SUPPLY_PROP_CURRENT_AVG,
337 POWER_SUPPLY_PROP_PRESENT,
338 POWER_SUPPLY_PROP_ONLINE,
339 POWER_SUPPLY_PROP_VOLTAGE_NOW,
340 POWER_SUPPLY_PROP_VOLTAGE_AVG,
341 POWER_SUPPLY_PROP_CURRENT_NOW,
342 };
343
344 /*
345 * Function for enabling and disabling sw fallback mode
346 * should always be disabled when no charger is connected.
347 */
348 static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di,
349 bool fallback)
350 {
351 u8 val;
352 u8 reg;
353 u8 bank;
354 u8 bit;
355 int ret;
356
357 dev_dbg(di->dev, "SW Fallback: %d\n", fallback);
358
359 if (is_ab8500(di->parent)) {
360 bank = 0x15;
361 reg = 0x0;
362 bit = 3;
363 } else {
364 bank = AB8500_SYS_CTRL1_BLOCK;
365 reg = AB8500_SW_CONTROL_FALLBACK;
366 bit = 0;
367 }
368
369 /* read the register containing fallback bit */
370 ret = abx500_get_register_interruptible(di->dev, bank, reg, &val);
371 if (ret < 0) {
372 dev_err(di->dev, "%d read failed\n", __LINE__);
373 return;
374 }
375
376 if (is_ab8500(di->parent)) {
377 /* enable the OPT emulation registers */
378 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
379 if (ret) {
380 dev_err(di->dev, "%d write failed\n", __LINE__);
381 goto disable_otp;
382 }
383 }
384
385 if (fallback)
386 val |= (1 << bit);
387 else
388 val &= ~(1 << bit);
389
390 /* write back the changed fallback bit value to register */
391 ret = abx500_set_register_interruptible(di->dev, bank, reg, val);
392 if (ret) {
393 dev_err(di->dev, "%d write failed\n", __LINE__);
394 }
395
396 disable_otp:
397 if (is_ab8500(di->parent)) {
398 /* disable the set OTP registers again */
399 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
400 if (ret) {
401 dev_err(di->dev, "%d write failed\n", __LINE__);
402 }
403 }
404 }
405
406 /**
407 * ab8500_power_supply_changed - a wrapper with local extensions for
408 * power_supply_changed
409 * @di: pointer to the ab8500_charger structure
410 * @psy: pointer to power_supply_that have changed.
411 *
412 */
413 static void ab8500_power_supply_changed(struct ab8500_charger *di,
414 struct power_supply *psy)
415 {
416 if (di->autopower_cfg) {
417 if (!di->usb.charger_connected &&
418 !di->ac.charger_connected &&
419 di->autopower) {
420 di->autopower = false;
421 ab8500_enable_disable_sw_fallback(di, false);
422 } else if (!di->autopower &&
423 (di->ac.charger_connected ||
424 di->usb.charger_connected)) {
425 di->autopower = true;
426 ab8500_enable_disable_sw_fallback(di, true);
427 }
428 }
429 power_supply_changed(psy);
430 }
431
432 static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
433 bool connected)
434 {
435 if (connected != di->usb.charger_connected) {
436 dev_dbg(di->dev, "USB connected:%i\n", connected);
437 di->usb.charger_connected = connected;
438
439 if (!connected)
440 di->flags.vbus_drop_end = false;
441
442 sysfs_notify(&di->usb_chg.psy->dev.kobj, NULL, "present");
443
444 if (connected) {
445 mutex_lock(&di->charger_attached_mutex);
446 mutex_unlock(&di->charger_attached_mutex);
447
448 if (is_ab8500(di->parent))
449 queue_delayed_work(di->charger_wq,
450 &di->usb_charger_attached_work,
451 HZ);
452 } else {
453 cancel_delayed_work_sync(&di->usb_charger_attached_work);
454 mutex_lock(&di->charger_attached_mutex);
455 mutex_unlock(&di->charger_attached_mutex);
456 }
457 }
458 }
459
460 /**
461 * ab8500_charger_get_ac_voltage() - get ac charger voltage
462 * @di: pointer to the ab8500_charger structure
463 *
464 * Returns ac charger voltage (on success)
465 */
466 static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
467 {
468 int vch, ret;
469
470 /* Only measure voltage if the charger is connected */
471 if (di->ac.charger_connected) {
472 ret = iio_read_channel_processed(di->adc_main_charger_v, &vch);
473 if (ret < 0)
474 dev_err(di->dev, "%s ADC conv failed,\n", __func__);
475 } else {
476 vch = 0;
477 }
478 return vch;
479 }
480
481 /**
482 * ab8500_charger_ac_cv() - check if the main charger is in CV mode
483 * @di: pointer to the ab8500_charger structure
484 *
485 * Returns ac charger CV mode (on success) else error code
486 */
487 static int ab8500_charger_ac_cv(struct ab8500_charger *di)
488 {
489 u8 val;
490 int ret = 0;
491
492 /* Only check CV mode if the charger is online */
493 if (di->ac.charger_online) {
494 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
495 AB8500_CH_STATUS1_REG, &val);
496 if (ret < 0) {
497 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
498 return 0;
499 }
500
501 if (val & MAIN_CH_CV_ON)
502 ret = 1;
503 else
504 ret = 0;
505 }
506
507 return ret;
508 }
509
510 /**
511 * ab8500_charger_get_vbus_voltage() - get vbus voltage
512 * @di: pointer to the ab8500_charger structure
513 *
514 * This function returns the vbus voltage.
515 * Returns vbus voltage (on success)
516 */
517 static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
518 {
519 int vch, ret;
520
521 /* Only measure voltage if the charger is connected */
522 if (di->usb.charger_connected) {
523 ret = iio_read_channel_processed(di->adc_vbus_v, &vch);
524 if (ret < 0)
525 dev_err(di->dev, "%s ADC conv failed,\n", __func__);
526 } else {
527 vch = 0;
528 }
529 return vch;
530 }
531
532 /**
533 * ab8500_charger_get_usb_current() - get usb charger current
534 * @di: pointer to the ab8500_charger structure
535 *
536 * This function returns the usb charger current.
537 * Returns usb current (on success) and error code on failure
538 */
539 static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
540 {
541 int ich, ret;
542
543 /* Only measure current if the charger is online */
544 if (di->usb.charger_online) {
545 ret = iio_read_channel_processed(di->adc_usb_charger_c, &ich);
546 if (ret < 0)
547 dev_err(di->dev, "%s ADC conv failed,\n", __func__);
548 } else {
549 ich = 0;
550 }
551 return ich;
552 }
553
554 /**
555 * ab8500_charger_get_ac_current() - get ac charger current
556 * @di: pointer to the ab8500_charger structure
557 *
558 * This function returns the ac charger current.
559 * Returns ac current (on success) and error code on failure.
560 */
561 static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
562 {
563 int ich, ret;
564
565 /* Only measure current if the charger is online */
566 if (di->ac.charger_online) {
567 ret = iio_read_channel_processed(di->adc_main_charger_c, &ich);
568 if (ret < 0)
569 dev_err(di->dev, "%s ADC conv failed,\n", __func__);
570 } else {
571 ich = 0;
572 }
573 return ich;
574 }
575
576 /**
577 * ab8500_charger_usb_cv() - check if the usb charger is in CV mode
578 * @di: pointer to the ab8500_charger structure
579 *
580 * Returns ac charger CV mode (on success) else error code
581 */
582 static int ab8500_charger_usb_cv(struct ab8500_charger *di)
583 {
584 int ret;
585 u8 val;
586
587 /* Only check CV mode if the charger is online */
588 if (di->usb.charger_online) {
589 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
590 AB8500_CH_USBCH_STAT1_REG, &val);
591 if (ret < 0) {
592 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
593 return 0;
594 }
595
596 if (val & USB_CH_CV_ON)
597 ret = 1;
598 else
599 ret = 0;
600 } else {
601 ret = 0;
602 }
603
604 return ret;
605 }
606
607 /**
608 * ab8500_charger_detect_chargers() - Detect the connected chargers
609 * @di: pointer to the ab8500_charger structure
610 * @probe: if probe, don't delay and wait for HW
611 *
612 * Returns the type of charger connected.
613 * For USB it will not mean we can actually charge from it
614 * but that there is a USB cable connected that we have to
615 * identify. This is used during startup when we don't get
616 * interrupts of the charger detection
617 *
618 * Returns an integer value, that means,
619 * NO_PW_CONN no power supply is connected
620 * AC_PW_CONN if the AC power supply is connected
621 * USB_PW_CONN if the USB power supply is connected
622 * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected
623 */
624 static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe)
625 {
626 int result = NO_PW_CONN;
627 int ret;
628 u8 val;
629
630 /* Check for AC charger */
631 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
632 AB8500_CH_STATUS1_REG, &val);
633 if (ret < 0) {
634 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
635 return ret;
636 }
637
638 if (val & MAIN_CH_DET)
639 result = AC_PW_CONN;
640
641 /* Check for USB charger */
642
643 if (!probe) {
644 /*
645 * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100
646 * when disconnecting ACA even though no
647 * charger was connected. Try waiting a little
648 * longer than the 100 ms of VBUS_DET_DBNC100...
649 */
650 msleep(110);
651 }
652 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
653 AB8500_CH_USBCH_STAT1_REG, &val);
654 if (ret < 0) {
655 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
656 return ret;
657 }
658 dev_dbg(di->dev,
659 "%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__,
660 val);
661 if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100))
662 result |= USB_PW_CONN;
663
664 return result;
665 }
666
667 /**
668 * ab8500_charger_max_usb_curr() - get the max curr for the USB type
669 * @di: pointer to the ab8500_charger structure
670 * @link_status: the identified USB type
671 *
672 * Get the maximum current that is allowed to be drawn from the host
673 * based on the USB type.
674 * Returns error code in case of failure else 0 on success
675 */
676 static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
677 enum ab8500_charger_link_status link_status)
678 {
679 int ret = 0;
680
681 di->usb_device_is_unrecognised = false;
682
683 /*
684 * Platform only supports USB 2.0.
685 * This means that charging current from USB source
686 * is maximum 500 mA. Every occurrence of USB_STAT_*_HOST_*
687 * should set USB_CH_IP_CUR_LVL_0P5.
688 */
689
690 switch (link_status) {
691 case USB_STAT_STD_HOST_NC:
692 case USB_STAT_STD_HOST_C_NS:
693 case USB_STAT_STD_HOST_C_S:
694 dev_dbg(di->dev, "USB Type - Standard host is "
695 "detected through USB driver\n");
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_CHIRP:
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_HOST_CHG_HS:
704 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
705 di->is_aca_rid = 0;
706 break;
707 case USB_STAT_ACA_RID_C_HS:
708 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P9;
709 di->is_aca_rid = 0;
710 break;
711 case USB_STAT_ACA_RID_A:
712 /*
713 * Dedicated charger level minus maximum current accessory
714 * can consume (900mA). Closest level is 500mA
715 */
716 dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n");
717 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
718 di->is_aca_rid = 1;
719 break;
720 case USB_STAT_ACA_RID_B:
721 /*
722 * Dedicated charger level minus 120mA (20mA for ACA and
723 * 100mA for potential accessory). Closest level is 1300mA
724 */
725 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P3;
726 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
727 di->max_usb_in_curr.usb_type_max);
728 di->is_aca_rid = 1;
729 break;
730 case USB_STAT_HOST_CHG_NM:
731 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
732 di->is_aca_rid = 0;
733 break;
734 case USB_STAT_DEDICATED_CHG:
735 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
736 di->is_aca_rid = 0;
737 break;
738 case USB_STAT_ACA_RID_C_HS_CHIRP:
739 case USB_STAT_ACA_RID_C_NM:
740 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
741 di->is_aca_rid = 1;
742 break;
743 case USB_STAT_NOT_CONFIGURED:
744 if (di->vbus_detected) {
745 di->usb_device_is_unrecognised = true;
746 dev_dbg(di->dev, "USB Type - Legacy charger.\n");
747 di->max_usb_in_curr.usb_type_max =
748 USB_CH_IP_CUR_LVL_1P5;
749 break;
750 }
751 fallthrough;
752 case USB_STAT_HM_IDGND:
753 dev_err(di->dev, "USB Type - Charging not allowed\n");
754 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
755 ret = -ENXIO;
756 break;
757 case USB_STAT_RESERVED:
758 if (is_ab8500(di->parent)) {
759 di->flags.vbus_collapse = true;
760 dev_err(di->dev, "USB Type - USB_STAT_RESERVED "
761 "VBUS has collapsed\n");
762 ret = -ENXIO;
763 break;
764 } else {
765 dev_dbg(di->dev, "USB Type - Charging not allowed\n");
766 di->max_usb_in_curr.usb_type_max =
767 USB_CH_IP_CUR_LVL_0P05;
768 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
769 link_status,
770 di->max_usb_in_curr.usb_type_max);
771 ret = -ENXIO;
772 break;
773 }
774 case USB_STAT_CARKIT_1:
775 case USB_STAT_CARKIT_2:
776 case USB_STAT_ACA_DOCK_CHARGER:
777 case USB_STAT_CHARGER_LINE_1:
778 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
779 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
780 di->max_usb_in_curr.usb_type_max);
781 break;
782 case USB_STAT_NOT_VALID_LINK:
783 dev_err(di->dev, "USB Type invalid - try charging anyway\n");
784 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
785 break;
786
787 default:
788 dev_err(di->dev, "USB Type - Unknown\n");
789 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
790 ret = -ENXIO;
791 break;
792 }
793
794 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
795 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
796 link_status, di->max_usb_in_curr.set_max);
797
798 return ret;
799 }
800
801 /**
802 * ab8500_charger_read_usb_type() - read the type of usb connected
803 * @di: pointer to the ab8500_charger structure
804 *
805 * Detect the type of the plugged USB
806 * Returns error code in case of failure else 0 on success
807 */
808 static int ab8500_charger_read_usb_type(struct ab8500_charger *di)
809 {
810 int ret;
811 u8 val;
812
813 ret = abx500_get_register_interruptible(di->dev,
814 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val);
815 if (ret < 0) {
816 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
817 return ret;
818 }
819 if (is_ab8500(di->parent))
820 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
821 AB8500_USB_LINE_STAT_REG, &val);
822 else
823 ret = abx500_get_register_interruptible(di->dev,
824 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
825 if (ret < 0) {
826 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
827 return ret;
828 }
829
830 /* get the USB type */
831 if (is_ab8500(di->parent))
832 val = (val & AB8500_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
833 else
834 val = (val & AB8505_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
835 ret = ab8500_charger_max_usb_curr(di,
836 (enum ab8500_charger_link_status) val);
837
838 return ret;
839 }
840
841 /**
842 * ab8500_charger_detect_usb_type() - get the type of usb connected
843 * @di: pointer to the ab8500_charger structure
844 *
845 * Detect the type of the plugged USB
846 * Returns error code in case of failure else 0 on success
847 */
848 static int ab8500_charger_detect_usb_type(struct ab8500_charger *di)
849 {
850 int i, ret;
851 u8 val;
852
853 /*
854 * On getting the VBUS rising edge detect interrupt there
855 * is a 250ms delay after which the register UsbLineStatus
856 * is filled with valid data.
857 */
858 for (i = 0; i < 10; i++) {
859 msleep(250);
860 ret = abx500_get_register_interruptible(di->dev,
861 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG,
862 &val);
863 dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n",
864 __func__, val);
865 if (ret < 0) {
866 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
867 return ret;
868 }
869
870 if (is_ab8500(di->parent))
871 ret = abx500_get_register_interruptible(di->dev,
872 AB8500_USB, AB8500_USB_LINE_STAT_REG, &val);
873 else
874 ret = abx500_get_register_interruptible(di->dev,
875 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
876 if (ret < 0) {
877 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
878 return ret;
879 }
880 dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__,
881 val);
882 /*
883 * Until the IT source register is read the UsbLineStatus
884 * register is not updated, hence doing the same
885 * Revisit this:
886 */
887
888 /* get the USB type */
889 if (is_ab8500(di->parent))
890 val = (val & AB8500_USB_LINK_STATUS) >>
891 USB_LINK_STATUS_SHIFT;
892 else
893 val = (val & AB8505_USB_LINK_STATUS) >>
894 USB_LINK_STATUS_SHIFT;
895 if (val)
896 break;
897 }
898 ret = ab8500_charger_max_usb_curr(di,
899 (enum ab8500_charger_link_status) val);
900
901 return ret;
902 }
903
904 /*
905 * This array maps the raw hex value to charger voltage used by the AB8500
906 * Values taken from the UM0836
907 */
908 static int ab8500_charger_voltage_map[] = {
909 3500 ,
910 3525 ,
911 3550 ,
912 3575 ,
913 3600 ,
914 3625 ,
915 3650 ,
916 3675 ,
917 3700 ,
918 3725 ,
919 3750 ,
920 3775 ,
921 3800 ,
922 3825 ,
923 3850 ,
924 3875 ,
925 3900 ,
926 3925 ,
927 3950 ,
928 3975 ,
929 4000 ,
930 4025 ,
931 4050 ,
932 4060 ,
933 4070 ,
934 4080 ,
935 4090 ,
936 4100 ,
937 4110 ,
938 4120 ,
939 4130 ,
940 4140 ,
941 4150 ,
942 4160 ,
943 4170 ,
944 4180 ,
945 4190 ,
946 4200 ,
947 4210 ,
948 4220 ,
949 4230 ,
950 4240 ,
951 4250 ,
952 4260 ,
953 4270 ,
954 4280 ,
955 4290 ,
956 4300 ,
957 4310 ,
958 4320 ,
959 4330 ,
960 4340 ,
961 4350 ,
962 4360 ,
963 4370 ,
964 4380 ,
965 4390 ,
966 4400 ,
967 4410 ,
968 4420 ,
969 4430 ,
970 4440 ,
971 4450 ,
972 4460 ,
973 4470 ,
974 4480 ,
975 4490 ,
976 4500 ,
977 4510 ,
978 4520 ,
979 4530 ,
980 4540 ,
981 4550 ,
982 4560 ,
983 4570 ,
984 4580 ,
985 4590 ,
986 4600 ,
987 };
988
989 static int ab8500_voltage_to_regval(int voltage)
990 {
991 int i;
992
993 /* Special case for voltage below 3.5V */
994 if (voltage < ab8500_charger_voltage_map[0])
995 return LOW_VOLT_REG;
996
997 for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) {
998 if (voltage < ab8500_charger_voltage_map[i])
999 return i - 1;
1000 }
1001
1002 /* If not last element, return error */
1003 i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1;
1004 if (voltage == ab8500_charger_voltage_map[i])
1005 return i;
1006 else
1007 return -1;
1008 }
1009
1010 static int ab8500_current_to_regval(struct ab8500_charger *di, int curr)
1011 {
1012 int i;
1013
1014 if (curr < di->bm->chg_output_curr[0])
1015 return 0;
1016
1017 for (i = 0; i < di->bm->n_chg_out_curr; i++) {
1018 if (curr < di->bm->chg_output_curr[i])
1019 return i - 1;
1020 }
1021
1022 /* If not last element, return error */
1023 i = di->bm->n_chg_out_curr - 1;
1024 if (curr == di->bm->chg_output_curr[i])
1025 return i;
1026 else
1027 return -1;
1028 }
1029
1030 static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr)
1031 {
1032 int i;
1033
1034 if (curr < di->bm->chg_input_curr[0])
1035 return 0;
1036
1037 for (i = 0; i < di->bm->n_chg_in_curr; i++) {
1038 if (curr < di->bm->chg_input_curr[i])
1039 return i - 1;
1040 }
1041
1042 /* If not last element, return error */
1043 i = di->bm->n_chg_in_curr - 1;
1044 if (curr == di->bm->chg_input_curr[i])
1045 return i;
1046 else
1047 return -1;
1048 }
1049
1050 /**
1051 * ab8500_charger_get_usb_cur() - get usb current
1052 * @di: pointer to the ab8500_charger structre
1053 *
1054 * The usb stack provides the maximum current that can be drawn from
1055 * the standard usb host. This will be in mA.
1056 * This function converts current in mA to a value that can be written
1057 * to the register. Returns -1 if charging is not allowed
1058 */
1059 static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
1060 {
1061 int ret = 0;
1062 switch (di->usb_state.usb_current) {
1063 case 100:
1064 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P09;
1065 break;
1066 case 200:
1067 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P19;
1068 break;
1069 case 300:
1070 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P29;
1071 break;
1072 case 400:
1073 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P38;
1074 break;
1075 case 500:
1076 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
1077 break;
1078 default:
1079 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
1080 ret = -EPERM;
1081 break;
1082 }
1083 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
1084 return ret;
1085 }
1086
1087 /**
1088 * ab8500_charger_check_continue_stepping() - Check to allow stepping
1089 * @di: pointer to the ab8500_charger structure
1090 * @reg: select what charger register to check
1091 *
1092 * Check if current stepping should be allowed to continue.
1093 * Checks if charger source has not collapsed. If it has, further stepping
1094 * is not allowed.
1095 */
1096 static bool ab8500_charger_check_continue_stepping(struct ab8500_charger *di,
1097 int reg)
1098 {
1099 if (reg == AB8500_USBCH_IPT_CRNTLVL_REG)
1100 return !di->flags.vbus_drop_end;
1101 else
1102 return true;
1103 }
1104
1105 /**
1106 * ab8500_charger_set_current() - set charger current
1107 * @di: pointer to the ab8500_charger structure
1108 * @ich: charger current, in mA
1109 * @reg: select what charger register to set
1110 *
1111 * Set charger current.
1112 * There is no state machine in the AB to step up/down the charger
1113 * current to avoid dips and spikes on MAIN, VBUS and VBAT when
1114 * charging is started. Instead we need to implement
1115 * this charger current step-up/down here.
1116 * Returns error code in case of failure else 0(on success)
1117 */
1118 static int ab8500_charger_set_current(struct ab8500_charger *di,
1119 int ich, int reg)
1120 {
1121 int ret = 0;
1122 int curr_index, prev_curr_index, shift_value, i;
1123 u8 reg_value;
1124 u32 step_udelay;
1125 bool no_stepping = false;
1126
1127 atomic_inc(&di->current_stepping_sessions);
1128
1129 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1130 reg, &reg_value);
1131 if (ret < 0) {
1132 dev_err(di->dev, "%s read failed\n", __func__);
1133 goto exit_set_current;
1134 }
1135
1136 switch (reg) {
1137 case AB8500_MCH_IPT_CURLVL_REG:
1138 shift_value = MAIN_CH_INPUT_CURR_SHIFT;
1139 prev_curr_index = (reg_value >> shift_value);
1140 curr_index = ab8500_current_to_regval(di, ich);
1141 step_udelay = STEP_UDELAY;
1142 if (!di->ac.charger_connected)
1143 no_stepping = true;
1144 break;
1145 case AB8500_USBCH_IPT_CRNTLVL_REG:
1146 shift_value = VBUS_IN_CURR_LIM_SHIFT;
1147 prev_curr_index = (reg_value >> shift_value);
1148 curr_index = ab8500_vbus_in_curr_to_regval(di, ich);
1149 step_udelay = STEP_UDELAY * 100;
1150
1151 if (!di->usb.charger_connected)
1152 no_stepping = true;
1153 break;
1154 case AB8500_CH_OPT_CRNTLVL_REG:
1155 shift_value = 0;
1156 prev_curr_index = (reg_value >> shift_value);
1157 curr_index = ab8500_current_to_regval(di, ich);
1158 step_udelay = STEP_UDELAY;
1159 if (curr_index && (curr_index - prev_curr_index) > 1)
1160 step_udelay *= 100;
1161
1162 if (!di->usb.charger_connected && !di->ac.charger_connected)
1163 no_stepping = true;
1164
1165 break;
1166 default:
1167 dev_err(di->dev, "%s current register not valid\n", __func__);
1168 ret = -ENXIO;
1169 goto exit_set_current;
1170 }
1171
1172 if (curr_index < 0) {
1173 dev_err(di->dev, "requested current limit out-of-range\n");
1174 ret = -ENXIO;
1175 goto exit_set_current;
1176 }
1177
1178 /* only update current if it's been changed */
1179 if (prev_curr_index == curr_index) {
1180 dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n",
1181 __func__, reg);
1182 ret = 0;
1183 goto exit_set_current;
1184 }
1185
1186 dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n",
1187 __func__, ich, reg);
1188
1189 if (no_stepping) {
1190 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1191 reg, (u8)curr_index << shift_value);
1192 if (ret)
1193 dev_err(di->dev, "%s write failed\n", __func__);
1194 } else if (prev_curr_index > curr_index) {
1195 for (i = prev_curr_index - 1; i >= curr_index; i--) {
1196 dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n",
1197 (u8) i << shift_value, reg);
1198 ret = abx500_set_register_interruptible(di->dev,
1199 AB8500_CHARGER, reg, (u8)i << shift_value);
1200 if (ret) {
1201 dev_err(di->dev, "%s write failed\n", __func__);
1202 goto exit_set_current;
1203 }
1204 if (i != curr_index)
1205 usleep_range(step_udelay, step_udelay * 2);
1206 }
1207 } else {
1208 bool allow = true;
1209 for (i = prev_curr_index + 1; i <= curr_index && allow; i++) {
1210 dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n",
1211 (u8)i << shift_value, reg);
1212 ret = abx500_set_register_interruptible(di->dev,
1213 AB8500_CHARGER, reg, (u8)i << shift_value);
1214 if (ret) {
1215 dev_err(di->dev, "%s write failed\n", __func__);
1216 goto exit_set_current;
1217 }
1218 if (i != curr_index)
1219 usleep_range(step_udelay, step_udelay * 2);
1220
1221 allow = ab8500_charger_check_continue_stepping(di, reg);
1222 }
1223 }
1224
1225 exit_set_current:
1226 atomic_dec(&di->current_stepping_sessions);
1227
1228 return ret;
1229 }
1230
1231 /**
1232 * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
1233 * @di: pointer to the ab8500_charger structure
1234 * @ich_in: charger input current limit
1235 *
1236 * Sets the current that can be drawn from the USB host
1237 * Returns error code in case of failure else 0(on success)
1238 */
1239 static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
1240 int ich_in)
1241 {
1242 int min_value;
1243 int ret;
1244
1245 /* We should always use to lowest current limit */
1246 min_value = min(di->bm->chg_params->usb_curr_max, ich_in);
1247 if (di->max_usb_in_curr.set_max > 0)
1248 min_value = min(di->max_usb_in_curr.set_max, min_value);
1249
1250 if (di->usb_state.usb_current >= 0)
1251 min_value = min(di->usb_state.usb_current, min_value);
1252
1253 switch (min_value) {
1254 case 100:
1255 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1256 min_value = USB_CH_IP_CUR_LVL_0P05;
1257 break;
1258 case 500:
1259 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1260 min_value = USB_CH_IP_CUR_LVL_0P45;
1261 break;
1262 default:
1263 break;
1264 }
1265
1266 dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value);
1267
1268 mutex_lock(&di->usb_ipt_crnt_lock);
1269 ret = ab8500_charger_set_current(di, min_value,
1270 AB8500_USBCH_IPT_CRNTLVL_REG);
1271 mutex_unlock(&di->usb_ipt_crnt_lock);
1272
1273 return ret;
1274 }
1275
1276 /**
1277 * ab8500_charger_set_main_in_curr() - set main charger input current
1278 * @di: pointer to the ab8500_charger structure
1279 * @ich_in: input charger current, in mA
1280 *
1281 * Set main charger input current.
1282 * Returns error code in case of failure else 0(on success)
1283 */
1284 static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di,
1285 int ich_in)
1286 {
1287 return ab8500_charger_set_current(di, ich_in,
1288 AB8500_MCH_IPT_CURLVL_REG);
1289 }
1290
1291 /**
1292 * ab8500_charger_set_output_curr() - set charger output current
1293 * @di: pointer to the ab8500_charger structure
1294 * @ich_out: output charger current, in mA
1295 *
1296 * Set charger output current.
1297 * Returns error code in case of failure else 0(on success)
1298 */
1299 static int ab8500_charger_set_output_curr(struct ab8500_charger *di,
1300 int ich_out)
1301 {
1302 return ab8500_charger_set_current(di, ich_out,
1303 AB8500_CH_OPT_CRNTLVL_REG);
1304 }
1305
1306 /**
1307 * ab8500_charger_led_en() - turn on/off chargign led
1308 * @di: pointer to the ab8500_charger structure
1309 * @on: flag to turn on/off the chargign led
1310 *
1311 * Power ON/OFF charging LED indication
1312 * Returns error code in case of failure else 0(on success)
1313 */
1314 static int ab8500_charger_led_en(struct ab8500_charger *di, int on)
1315 {
1316 int ret;
1317
1318 if (on) {
1319 /* Power ON charging LED indicator, set LED current to 5mA */
1320 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1321 AB8500_LED_INDICATOR_PWM_CTRL,
1322 (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA));
1323 if (ret) {
1324 dev_err(di->dev, "Power ON LED failed\n");
1325 return ret;
1326 }
1327 /* LED indicator PWM duty cycle 252/256 */
1328 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1329 AB8500_LED_INDICATOR_PWM_DUTY,
1330 LED_INDICATOR_PWM_DUTY_252_256);
1331 if (ret) {
1332 dev_err(di->dev, "Set LED PWM duty cycle failed\n");
1333 return ret;
1334 }
1335 } else {
1336 /* Power off charging LED indicator */
1337 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1338 AB8500_LED_INDICATOR_PWM_CTRL,
1339 LED_INDICATOR_PWM_DIS);
1340 if (ret) {
1341 dev_err(di->dev, "Power-off LED failed\n");
1342 return ret;
1343 }
1344 }
1345
1346 return ret;
1347 }
1348
1349 /**
1350 * ab8500_charger_ac_en() - enable or disable ac charging
1351 * @di: pointer to the ab8500_charger structure
1352 * @enable: enable/disable flag
1353 * @vset: charging voltage
1354 * @iset: charging current
1355 *
1356 * Enable/Disable AC/Mains charging and turns on/off the charging led
1357 * respectively.
1358 **/
1359 static int ab8500_charger_ac_en(struct ux500_charger *charger,
1360 int enable, int vset, int iset)
1361 {
1362 int ret;
1363 int volt_index;
1364 int curr_index;
1365 int input_curr_index;
1366 u8 overshoot = 0;
1367
1368 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1369
1370 if (enable) {
1371 /* Check if AC is connected */
1372 if (!di->ac.charger_connected) {
1373 dev_err(di->dev, "AC charger not connected\n");
1374 return -ENXIO;
1375 }
1376
1377 /* Enable AC charging */
1378 dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset);
1379
1380 /*
1381 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1382 * will be triggered every time we enable the VDD ADC supply.
1383 * This will turn off charging for a short while.
1384 * It can be avoided by having the supply on when
1385 * there is a charger enabled. Normally the VDD ADC supply
1386 * is enabled every time a GPADC conversion is triggered.
1387 * We will force it to be enabled from this driver to have
1388 * the GPADC module independent of the AB8500 chargers
1389 */
1390 if (!di->vddadc_en_ac) {
1391 ret = regulator_enable(di->regu);
1392 if (ret)
1393 dev_warn(di->dev,
1394 "Failed to enable regulator\n");
1395 else
1396 di->vddadc_en_ac = true;
1397 }
1398
1399 /* Check if the requested voltage or current is valid */
1400 volt_index = ab8500_voltage_to_regval(vset);
1401 curr_index = ab8500_current_to_regval(di, iset);
1402 input_curr_index = ab8500_current_to_regval(di,
1403 di->bm->chg_params->ac_curr_max);
1404 if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
1405 dev_err(di->dev,
1406 "Charger voltage or current too high, "
1407 "charging not started\n");
1408 return -ENXIO;
1409 }
1410
1411 /* ChVoltLevel: maximum battery charging voltage */
1412 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1413 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1414 if (ret) {
1415 dev_err(di->dev, "%s write failed\n", __func__);
1416 return ret;
1417 }
1418 /* MainChInputCurr: current that can be drawn from the charger*/
1419 ret = ab8500_charger_set_main_in_curr(di,
1420 di->bm->chg_params->ac_curr_max);
1421 if (ret) {
1422 dev_err(di->dev, "%s Failed to set MainChInputCurr\n",
1423 __func__);
1424 return ret;
1425 }
1426 /* ChOutputCurentLevel: protected output current */
1427 ret = ab8500_charger_set_output_curr(di, iset);
1428 if (ret) {
1429 dev_err(di->dev, "%s "
1430 "Failed to set ChOutputCurentLevel\n",
1431 __func__);
1432 return ret;
1433 }
1434
1435 /* Check if VBAT overshoot control should be enabled */
1436 if (!di->bm->enable_overshoot)
1437 overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;
1438
1439 /* Enable Main Charger */
1440 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1441 AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot);
1442 if (ret) {
1443 dev_err(di->dev, "%s write failed\n", __func__);
1444 return ret;
1445 }
1446
1447 /* Power on charging LED indication */
1448 ret = ab8500_charger_led_en(di, true);
1449 if (ret < 0)
1450 dev_err(di->dev, "failed to enable LED\n");
1451
1452 di->ac.charger_online = 1;
1453 } else {
1454 /* Disable AC charging */
1455 if (is_ab8500_1p1_or_earlier(di->parent)) {
1456 /*
1457 * For ABB revision 1.0 and 1.1 there is a bug in the
1458 * watchdog logic. That means we have to continuously
1459 * kick the charger watchdog even when no charger is
1460 * connected. This is only valid once the AC charger
1461 * has been enabled. This is a bug that is not handled
1462 * by the algorithm and the watchdog have to be kicked
1463 * by the charger driver when the AC charger
1464 * is disabled
1465 */
1466 if (di->ac_conn) {
1467 queue_delayed_work(di->charger_wq,
1468 &di->kick_wd_work,
1469 round_jiffies(WD_KICK_INTERVAL));
1470 }
1471
1472 /*
1473 * We can't turn off charging completely
1474 * due to a bug in AB8500 cut1.
1475 * If we do, charging will not start again.
1476 * That is why we set the lowest voltage
1477 * and current possible
1478 */
1479 ret = abx500_set_register_interruptible(di->dev,
1480 AB8500_CHARGER,
1481 AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5);
1482 if (ret) {
1483 dev_err(di->dev,
1484 "%s write failed\n", __func__);
1485 return ret;
1486 }
1487
1488 ret = ab8500_charger_set_output_curr(di, 0);
1489 if (ret) {
1490 dev_err(di->dev, "%s "
1491 "Failed to set ChOutputCurentLevel\n",
1492 __func__);
1493 return ret;
1494 }
1495 } else {
1496 ret = abx500_set_register_interruptible(di->dev,
1497 AB8500_CHARGER,
1498 AB8500_MCH_CTRL1, 0);
1499 if (ret) {
1500 dev_err(di->dev,
1501 "%s write failed\n", __func__);
1502 return ret;
1503 }
1504 }
1505
1506 ret = ab8500_charger_led_en(di, false);
1507 if (ret < 0)
1508 dev_err(di->dev, "failed to disable LED\n");
1509
1510 di->ac.charger_online = 0;
1511 di->ac.wd_expired = false;
1512
1513 /* Disable regulator if enabled */
1514 if (di->vddadc_en_ac) {
1515 regulator_disable(di->regu);
1516 di->vddadc_en_ac = false;
1517 }
1518
1519 dev_dbg(di->dev, "%s Disabled AC charging\n", __func__);
1520 }
1521 ab8500_power_supply_changed(di, di->ac_chg.psy);
1522
1523 return ret;
1524 }
1525
1526 /**
1527 * ab8500_charger_usb_en() - enable usb charging
1528 * @di: pointer to the ab8500_charger structure
1529 * @enable: enable/disable flag
1530 * @vset: charging voltage
1531 * @ich_out: charger output current
1532 *
1533 * Enable/Disable USB charging and turns on/off the charging led respectively.
1534 * Returns error code in case of failure else 0(on success)
1535 */
1536 static int ab8500_charger_usb_en(struct ux500_charger *charger,
1537 int enable, int vset, int ich_out)
1538 {
1539 int ret;
1540 int volt_index;
1541 int curr_index;
1542 u8 overshoot = 0;
1543
1544 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1545
1546 if (enable) {
1547 /* Check if USB is connected */
1548 if (!di->usb.charger_connected) {
1549 dev_err(di->dev, "USB charger not connected\n");
1550 return -ENXIO;
1551 }
1552
1553 /*
1554 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1555 * will be triggered every time we enable the VDD ADC supply.
1556 * This will turn off charging for a short while.
1557 * It can be avoided by having the supply on when
1558 * there is a charger enabled. Normally the VDD ADC supply
1559 * is enabled every time a GPADC conversion is triggered.
1560 * We will force it to be enabled from this driver to have
1561 * the GPADC module independent of the AB8500 chargers
1562 */
1563 if (!di->vddadc_en_usb) {
1564 ret = regulator_enable(di->regu);
1565 if (ret)
1566 dev_warn(di->dev,
1567 "Failed to enable regulator\n");
1568 else
1569 di->vddadc_en_usb = true;
1570 }
1571
1572 /* Enable USB charging */
1573 dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out);
1574
1575 /* Check if the requested voltage or current is valid */
1576 volt_index = ab8500_voltage_to_regval(vset);
1577 curr_index = ab8500_current_to_regval(di, ich_out);
1578 if (volt_index < 0 || curr_index < 0) {
1579 dev_err(di->dev,
1580 "Charger voltage or current too high, "
1581 "charging not started\n");
1582 return -ENXIO;
1583 }
1584
1585 /*
1586 * ChVoltLevel: max voltage up to which battery can be
1587 * charged
1588 */
1589 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1590 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1591 if (ret) {
1592 dev_err(di->dev, "%s write failed\n", __func__);
1593 return ret;
1594 }
1595 /* Check if VBAT overshoot control should be enabled */
1596 if (!di->bm->enable_overshoot)
1597 overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;
1598
1599 /* Enable USB Charger */
1600 dev_dbg(di->dev,
1601 "Enabling USB with write to AB8500_USBCH_CTRL1_REG\n");
1602 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1603 AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot);
1604 if (ret) {
1605 dev_err(di->dev, "%s write failed\n", __func__);
1606 return ret;
1607 }
1608
1609 /* If success power on charging LED indication */
1610 ret = ab8500_charger_led_en(di, true);
1611 if (ret < 0)
1612 dev_err(di->dev, "failed to enable LED\n");
1613
1614 di->usb.charger_online = 1;
1615
1616 /* USBChInputCurr: current that can be drawn from the usb */
1617 ret = ab8500_charger_set_vbus_in_curr(di,
1618 di->max_usb_in_curr.usb_type_max);
1619 if (ret) {
1620 dev_err(di->dev, "setting USBChInputCurr failed\n");
1621 return ret;
1622 }
1623
1624 /* ChOutputCurentLevel: protected output current */
1625 ret = ab8500_charger_set_output_curr(di, ich_out);
1626 if (ret) {
1627 dev_err(di->dev, "%s "
1628 "Failed to set ChOutputCurentLevel\n",
1629 __func__);
1630 return ret;
1631 }
1632
1633 queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);
1634
1635 } else {
1636 /* Disable USB charging */
1637 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1638 ret = abx500_set_register_interruptible(di->dev,
1639 AB8500_CHARGER,
1640 AB8500_USBCH_CTRL1_REG, 0);
1641 if (ret) {
1642 dev_err(di->dev,
1643 "%s write failed\n", __func__);
1644 return ret;
1645 }
1646
1647 ret = ab8500_charger_led_en(di, false);
1648 if (ret < 0)
1649 dev_err(di->dev, "failed to disable LED\n");
1650 /* USBChInputCurr: current that can be drawn from the usb */
1651 ret = ab8500_charger_set_vbus_in_curr(di, 0);
1652 if (ret) {
1653 dev_err(di->dev, "setting USBChInputCurr failed\n");
1654 return ret;
1655 }
1656
1657 /* ChOutputCurentLevel: protected output current */
1658 ret = ab8500_charger_set_output_curr(di, 0);
1659 if (ret) {
1660 dev_err(di->dev, "%s "
1661 "Failed to reset ChOutputCurentLevel\n",
1662 __func__);
1663 return ret;
1664 }
1665 di->usb.charger_online = 0;
1666 di->usb.wd_expired = false;
1667
1668 /* Disable regulator if enabled */
1669 if (di->vddadc_en_usb) {
1670 regulator_disable(di->regu);
1671 di->vddadc_en_usb = false;
1672 }
1673
1674 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1675
1676 /* Cancel any pending Vbat check work */
1677 cancel_delayed_work(&di->check_vbat_work);
1678
1679 }
1680 ab8500_power_supply_changed(di, di->usb_chg.psy);
1681
1682 return ret;
1683 }
1684
1685 static int ab8500_external_charger_prepare(struct notifier_block *charger_nb,
1686 unsigned long event, void *data)
1687 {
1688 int ret;
1689 struct device *dev = data;
1690 /*Toggle External charger control pin*/
1691 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1692 AB8500_SYS_CHARGER_CONTROL_REG,
1693 EXTERNAL_CHARGER_DISABLE_REG_VAL);
1694 if (ret < 0) {
1695 dev_err(dev, "write reg failed %d\n", ret);
1696 goto out;
1697 }
1698 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1699 AB8500_SYS_CHARGER_CONTROL_REG,
1700 EXTERNAL_CHARGER_ENABLE_REG_VAL);
1701 if (ret < 0)
1702 dev_err(dev, "Write reg failed %d\n", ret);
1703
1704 out:
1705 return ret;
1706 }
1707
1708 /**
1709 * ab8500_charger_usb_check_enable() - enable usb charging
1710 * @charger: pointer to the ux500_charger structure
1711 * @vset: charging voltage
1712 * @iset: charger output current
1713 *
1714 * Check if the VBUS charger has been disconnected and reconnected without
1715 * AB8500 rising an interrupt. Returns 0 on success.
1716 */
1717 static int ab8500_charger_usb_check_enable(struct ux500_charger *charger,
1718 int vset, int iset)
1719 {
1720 u8 usbch_ctrl1 = 0;
1721 int ret = 0;
1722
1723 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1724
1725 if (!di->usb.charger_connected)
1726 return ret;
1727
1728 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1729 AB8500_USBCH_CTRL1_REG, &usbch_ctrl1);
1730 if (ret < 0) {
1731 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1732 return ret;
1733 }
1734 dev_dbg(di->dev, "USB charger ctrl: 0x%02x\n", usbch_ctrl1);
1735
1736 if (!(usbch_ctrl1 & USB_CH_ENA)) {
1737 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1738
1739 ret = abx500_mask_and_set_register_interruptible(di->dev,
1740 AB8500_CHARGER, AB8500_CHARGER_CTRL,
1741 DROP_COUNT_RESET, DROP_COUNT_RESET);
1742 if (ret < 0) {
1743 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1744 return ret;
1745 }
1746
1747 ret = ab8500_charger_usb_en(&di->usb_chg, true, vset, iset);
1748 if (ret < 0) {
1749 dev_err(di->dev, "Failed to enable VBUS charger %d\n",
1750 __LINE__);
1751 return ret;
1752 }
1753 }
1754 return ret;
1755 }
1756
1757 /**
1758 * ab8500_charger_ac_check_enable() - enable usb charging
1759 * @charger: pointer to the ux500_charger structure
1760 * @vset: charging voltage
1761 * @iset: charger output current
1762 *
1763 * Check if the AC charger has been disconnected and reconnected without
1764 * AB8500 rising an interrupt. Returns 0 on success.
1765 */
1766 static int ab8500_charger_ac_check_enable(struct ux500_charger *charger,
1767 int vset, int iset)
1768 {
1769 u8 mainch_ctrl1 = 0;
1770 int ret = 0;
1771
1772 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1773
1774 if (!di->ac.charger_connected)
1775 return ret;
1776
1777 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1778 AB8500_MCH_CTRL1, &mainch_ctrl1);
1779 if (ret < 0) {
1780 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1781 return ret;
1782 }
1783 dev_dbg(di->dev, "AC charger ctrl: 0x%02x\n", mainch_ctrl1);
1784
1785 if (!(mainch_ctrl1 & MAIN_CH_ENA)) {
1786 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1787
1788 ret = abx500_mask_and_set_register_interruptible(di->dev,
1789 AB8500_CHARGER, AB8500_CHARGER_CTRL,
1790 DROP_COUNT_RESET, DROP_COUNT_RESET);
1791
1792 if (ret < 0) {
1793 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1794 return ret;
1795 }
1796
1797 ret = ab8500_charger_ac_en(&di->usb_chg, true, vset, iset);
1798 if (ret < 0) {
1799 dev_err(di->dev, "failed to enable AC charger %d\n",
1800 __LINE__);
1801 return ret;
1802 }
1803 }
1804 return ret;
1805 }
1806
1807 /**
1808 * ab8500_charger_watchdog_kick() - kick charger watchdog
1809 * @di: pointer to the ab8500_charger structure
1810 *
1811 * Kick charger watchdog
1812 * Returns error code in case of failure else 0(on success)
1813 */
1814 static int ab8500_charger_watchdog_kick(struct ux500_charger *charger)
1815 {
1816 int ret;
1817 struct ab8500_charger *di;
1818
1819 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
1820 di = to_ab8500_charger_ac_device_info(charger);
1821 else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1822 di = to_ab8500_charger_usb_device_info(charger);
1823 else
1824 return -ENXIO;
1825
1826 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1827 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
1828 if (ret)
1829 dev_err(di->dev, "Failed to kick WD!\n");
1830
1831 return ret;
1832 }
1833
1834 /**
1835 * ab8500_charger_update_charger_current() - update charger current
1836 * @di: pointer to the ab8500_charger structure
1837 *
1838 * Update the charger output current for the specified charger
1839 * Returns error code in case of failure else 0(on success)
1840 */
1841 static int ab8500_charger_update_charger_current(struct ux500_charger *charger,
1842 int ich_out)
1843 {
1844 int ret;
1845 struct ab8500_charger *di;
1846
1847 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
1848 di = to_ab8500_charger_ac_device_info(charger);
1849 else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1850 di = to_ab8500_charger_usb_device_info(charger);
1851 else
1852 return -ENXIO;
1853
1854 ret = ab8500_charger_set_output_curr(di, ich_out);
1855 if (ret) {
1856 dev_err(di->dev, "%s "
1857 "Failed to set ChOutputCurentLevel\n",
1858 __func__);
1859 return ret;
1860 }
1861
1862 /* Reset the main and usb drop input current measurement counter */
1863 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1864 AB8500_CHARGER_CTRL, DROP_COUNT_RESET);
1865 if (ret) {
1866 dev_err(di->dev, "%s write failed\n", __func__);
1867 return ret;
1868 }
1869
1870 return ret;
1871 }
1872
1873 static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
1874 {
1875 struct power_supply *psy;
1876 struct power_supply *ext = dev_get_drvdata(dev);
1877 const char **supplicants = (const char **)ext->supplied_to;
1878 struct ab8500_charger *di;
1879 union power_supply_propval ret;
1880 int j;
1881 struct ux500_charger *usb_chg;
1882
1883 usb_chg = (struct ux500_charger *)data;
1884 psy = usb_chg->psy;
1885
1886 di = to_ab8500_charger_usb_device_info(usb_chg);
1887
1888 /* For all psy where the driver name appears in any supplied_to */
1889 j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
1890 if (j < 0)
1891 return 0;
1892
1893 /* Go through all properties for the psy */
1894 for (j = 0; j < ext->desc->num_properties; j++) {
1895 enum power_supply_property prop;
1896 prop = ext->desc->properties[j];
1897
1898 if (power_supply_get_property(ext, prop, &ret))
1899 continue;
1900
1901 switch (prop) {
1902 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1903 switch (ext->desc->type) {
1904 case POWER_SUPPLY_TYPE_BATTERY:
1905 di->vbat = ret.intval / 1000;
1906 break;
1907 default:
1908 break;
1909 }
1910 break;
1911 default:
1912 break;
1913 }
1914 }
1915 return 0;
1916 }
1917
1918 /**
1919 * ab8500_charger_check_vbat_work() - keep vbus current within spec
1920 * @work pointer to the work_struct structure
1921 *
1922 * Due to a asic bug it is necessary to lower the input current to the vbus
1923 * charger when charging with at some specific levels. This issue is only valid
1924 * for below a certain battery voltage. This function makes sure that the
1925 * the allowed current limit isn't exceeded.
1926 */
1927 static void ab8500_charger_check_vbat_work(struct work_struct *work)
1928 {
1929 int t = 10;
1930 struct ab8500_charger *di = container_of(work,
1931 struct ab8500_charger, check_vbat_work.work);
1932
1933 class_for_each_device(power_supply_class, NULL,
1934 di->usb_chg.psy, ab8500_charger_get_ext_psy_data);
1935
1936 /* First run old_vbat is 0. */
1937 if (di->old_vbat == 0)
1938 di->old_vbat = di->vbat;
1939
1940 if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED &&
1941 di->vbat <= VBAT_TRESH_IP_CUR_RED) ||
1942 (di->old_vbat > VBAT_TRESH_IP_CUR_RED &&
1943 di->vbat > VBAT_TRESH_IP_CUR_RED))) {
1944
1945 dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d,"
1946 " old: %d\n", di->max_usb_in_curr.usb_type_max,
1947 di->vbat, di->old_vbat);
1948 ab8500_charger_set_vbus_in_curr(di,
1949 di->max_usb_in_curr.usb_type_max);
1950 power_supply_changed(di->usb_chg.psy);
1951 }
1952
1953 di->old_vbat = di->vbat;
1954
1955 /*
1956 * No need to check the battery voltage every second when not close to
1957 * the threshold.
1958 */
1959 if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) &&
1960 (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100)))
1961 t = 1;
1962
1963 queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ);
1964 }
1965
1966 /**
1967 * ab8500_charger_check_hw_failure_work() - check main charger failure
1968 * @work: pointer to the work_struct structure
1969 *
1970 * Work queue function for checking the main charger status
1971 */
1972 static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
1973 {
1974 int ret;
1975 u8 reg_value;
1976
1977 struct ab8500_charger *di = container_of(work,
1978 struct ab8500_charger, check_hw_failure_work.work);
1979
1980 /* Check if the status bits for HW failure is still active */
1981 if (di->flags.mainextchnotok) {
1982 ret = abx500_get_register_interruptible(di->dev,
1983 AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
1984 if (ret < 0) {
1985 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1986 return;
1987 }
1988 if (!(reg_value & MAIN_CH_NOK)) {
1989 di->flags.mainextchnotok = false;
1990 ab8500_power_supply_changed(di, di->ac_chg.psy);
1991 }
1992 }
1993 if (di->flags.vbus_ovv) {
1994 ret = abx500_get_register_interruptible(di->dev,
1995 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG,
1996 &reg_value);
1997 if (ret < 0) {
1998 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1999 return;
2000 }
2001 if (!(reg_value & VBUS_OVV_TH)) {
2002 di->flags.vbus_ovv = false;
2003 ab8500_power_supply_changed(di, di->usb_chg.psy);
2004 }
2005 }
2006 /* If we still have a failure, schedule a new check */
2007 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
2008 queue_delayed_work(di->charger_wq,
2009 &di->check_hw_failure_work, round_jiffies(HZ));
2010 }
2011 }
2012
2013 /**
2014 * ab8500_charger_kick_watchdog_work() - kick the watchdog
2015 * @work: pointer to the work_struct structure
2016 *
2017 * Work queue function for kicking the charger watchdog.
2018 *
2019 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
2020 * logic. That means we have to continuously kick the charger
2021 * watchdog even when no charger is connected. This is only
2022 * valid once the AC charger has been enabled. This is
2023 * a bug that is not handled by the algorithm and the
2024 * watchdog have to be kicked by the charger driver
2025 * when the AC charger is disabled
2026 */
2027 static void ab8500_charger_kick_watchdog_work(struct work_struct *work)
2028 {
2029 int ret;
2030
2031 struct ab8500_charger *di = container_of(work,
2032 struct ab8500_charger, kick_wd_work.work);
2033
2034 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
2035 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
2036 if (ret)
2037 dev_err(di->dev, "Failed to kick WD!\n");
2038
2039 /* Schedule a new watchdog kick */
2040 queue_delayed_work(di->charger_wq,
2041 &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL));
2042 }
2043
2044 /**
2045 * ab8500_charger_ac_work() - work to get and set main charger status
2046 * @work: pointer to the work_struct structure
2047 *
2048 * Work queue function for checking the main charger status
2049 */
2050 static void ab8500_charger_ac_work(struct work_struct *work)
2051 {
2052 int ret;
2053
2054 struct ab8500_charger *di = container_of(work,
2055 struct ab8500_charger, ac_work);
2056
2057 /*
2058 * Since we can't be sure that the events are received
2059 * synchronously, we have the check if the main charger is
2060 * connected by reading the status register
2061 */
2062 ret = ab8500_charger_detect_chargers(di, false);
2063 if (ret < 0)
2064 return;
2065
2066 if (ret & AC_PW_CONN) {
2067 di->ac.charger_connected = 1;
2068 di->ac_conn = true;
2069 } else {
2070 di->ac.charger_connected = 0;
2071 }
2072
2073 ab8500_power_supply_changed(di, di->ac_chg.psy);
2074 sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
2075 }
2076
2077 static void ab8500_charger_usb_attached_work(struct work_struct *work)
2078 {
2079 struct ab8500_charger *di = container_of(work,
2080 struct ab8500_charger,
2081 usb_charger_attached_work.work);
2082 int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC);
2083 int ret, i;
2084 u8 statval;
2085
2086 for (i = 0; i < 10; i++) {
2087 ret = abx500_get_register_interruptible(di->dev,
2088 AB8500_CHARGER,
2089 AB8500_CH_USBCH_STAT1_REG,
2090 &statval);
2091 if (ret < 0) {
2092 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2093 goto reschedule;
2094 }
2095 if ((statval & usbch) != usbch)
2096 goto reschedule;
2097
2098 msleep(CHARGER_STATUS_POLL);
2099 }
2100
2101 ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0);
2102
2103 mutex_lock(&di->charger_attached_mutex);
2104 mutex_unlock(&di->charger_attached_mutex);
2105
2106 return;
2107
2108 reschedule:
2109 queue_delayed_work(di->charger_wq,
2110 &di->usb_charger_attached_work,
2111 HZ);
2112 }
2113
2114 static void ab8500_charger_ac_attached_work(struct work_struct *work)
2115 {
2116
2117 struct ab8500_charger *di = container_of(work,
2118 struct ab8500_charger,
2119 ac_charger_attached_work.work);
2120 int mainch = (MAIN_CH_STATUS2_MAINCHGDROP |
2121 MAIN_CH_STATUS2_MAINCHARGERDETDBNC);
2122 int ret, i;
2123 u8 statval;
2124
2125 for (i = 0; i < 10; i++) {
2126 ret = abx500_get_register_interruptible(di->dev,
2127 AB8500_CHARGER,
2128 AB8500_CH_STATUS2_REG,
2129 &statval);
2130 if (ret < 0) {
2131 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2132 goto reschedule;
2133 }
2134
2135 if ((statval & mainch) != mainch)
2136 goto reschedule;
2137
2138 msleep(CHARGER_STATUS_POLL);
2139 }
2140
2141 ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0);
2142 queue_work(di->charger_wq, &di->ac_work);
2143
2144 mutex_lock(&di->charger_attached_mutex);
2145 mutex_unlock(&di->charger_attached_mutex);
2146
2147 return;
2148
2149 reschedule:
2150 queue_delayed_work(di->charger_wq,
2151 &di->ac_charger_attached_work,
2152 HZ);
2153 }
2154
2155 /**
2156 * ab8500_charger_detect_usb_type_work() - work to detect USB type
2157 * @work: Pointer to the work_struct structure
2158 *
2159 * Detect the type of USB plugged
2160 */
2161 static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
2162 {
2163 int ret;
2164
2165 struct ab8500_charger *di = container_of(work,
2166 struct ab8500_charger, detect_usb_type_work);
2167
2168 /*
2169 * Since we can't be sure that the events are received
2170 * synchronously, we have the check if is
2171 * connected by reading the status register
2172 */
2173 ret = ab8500_charger_detect_chargers(di, false);
2174 if (ret < 0)
2175 return;
2176
2177 if (!(ret & USB_PW_CONN)) {
2178 dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__);
2179 di->vbus_detected = false;
2180 ab8500_charger_set_usb_connected(di, false);
2181 ab8500_power_supply_changed(di, di->usb_chg.psy);
2182 } else {
2183 dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__);
2184 di->vbus_detected = true;
2185
2186 if (is_ab8500_1p1_or_earlier(di->parent)) {
2187 ret = ab8500_charger_detect_usb_type(di);
2188 if (!ret) {
2189 ab8500_charger_set_usb_connected(di, true);
2190 ab8500_power_supply_changed(di,
2191 di->usb_chg.psy);
2192 }
2193 } else {
2194 /*
2195 * For ABB cut2.0 and onwards we have an IRQ,
2196 * USB_LINK_STATUS that will be triggered when the USB
2197 * link status changes. The exception is USB connected
2198 * during startup. Then we don't get a
2199 * USB_LINK_STATUS IRQ
2200 */
2201 if (di->vbus_detected_start) {
2202 di->vbus_detected_start = false;
2203 ret = ab8500_charger_detect_usb_type(di);
2204 if (!ret) {
2205 ab8500_charger_set_usb_connected(di,
2206 true);
2207 ab8500_power_supply_changed(di,
2208 di->usb_chg.psy);
2209 }
2210 }
2211 }
2212 }
2213 }
2214
2215 /**
2216 * ab8500_charger_usb_link_attach_work() - work to detect USB type
2217 * @work: pointer to the work_struct structure
2218 *
2219 * Detect the type of USB plugged
2220 */
2221 static void ab8500_charger_usb_link_attach_work(struct work_struct *work)
2222 {
2223 struct ab8500_charger *di =
2224 container_of(work, struct ab8500_charger, attach_work.work);
2225 int ret;
2226
2227 /* Update maximum input current if USB enumeration is not detected */
2228 if (!di->usb.charger_online) {
2229 ret = ab8500_charger_set_vbus_in_curr(di,
2230 di->max_usb_in_curr.usb_type_max);
2231 if (ret)
2232 return;
2233 }
2234
2235 ab8500_charger_set_usb_connected(di, true);
2236 ab8500_power_supply_changed(di, di->usb_chg.psy);
2237 }
2238
2239 /**
2240 * ab8500_charger_usb_link_status_work() - work to detect USB type
2241 * @work: pointer to the work_struct structure
2242 *
2243 * Detect the type of USB plugged
2244 */
2245 static void ab8500_charger_usb_link_status_work(struct work_struct *work)
2246 {
2247 int detected_chargers;
2248 int ret;
2249 u8 val;
2250 u8 link_status;
2251
2252 struct ab8500_charger *di = container_of(work,
2253 struct ab8500_charger, usb_link_status_work);
2254
2255 /*
2256 * Since we can't be sure that the events are received
2257 * synchronously, we have the check if is
2258 * connected by reading the status register
2259 */
2260 detected_chargers = ab8500_charger_detect_chargers(di, false);
2261 if (detected_chargers < 0)
2262 return;
2263
2264 /*
2265 * Some chargers that breaks the USB spec is
2266 * identified as invalid by AB8500 and it refuse
2267 * to start the charging process. but by jumping
2268 * through a few hoops it can be forced to start.
2269 */
2270 if (is_ab8500(di->parent))
2271 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2272 AB8500_USB_LINE_STAT_REG, &val);
2273 else
2274 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2275 AB8500_USB_LINK1_STAT_REG, &val);
2276
2277 if (ret >= 0)
2278 dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val);
2279 else
2280 dev_dbg(di->dev, "Error reading USB link status\n");
2281
2282 if (is_ab8500(di->parent))
2283 link_status = AB8500_USB_LINK_STATUS;
2284 else
2285 link_status = AB8505_USB_LINK_STATUS;
2286
2287 if (detected_chargers & USB_PW_CONN) {
2288 if (((val & link_status) >> USB_LINK_STATUS_SHIFT) ==
2289 USB_STAT_NOT_VALID_LINK &&
2290 di->invalid_charger_detect_state == 0) {
2291 dev_dbg(di->dev,
2292 "Invalid charger detected, state= 0\n");
2293 /*Enable charger*/
2294 abx500_mask_and_set_register_interruptible(di->dev,
2295 AB8500_CHARGER, AB8500_USBCH_CTRL1_REG,
2296 USB_CH_ENA, USB_CH_ENA);
2297 /*Enable charger detection*/
2298 abx500_mask_and_set_register_interruptible(di->dev,
2299 AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2300 USB_CH_DET, USB_CH_DET);
2301 di->invalid_charger_detect_state = 1;
2302 /*exit and wait for new link status interrupt.*/
2303 return;
2304
2305 }
2306 if (di->invalid_charger_detect_state == 1) {
2307 dev_dbg(di->dev,
2308 "Invalid charger detected, state= 1\n");
2309 /*Stop charger detection*/
2310 abx500_mask_and_set_register_interruptible(di->dev,
2311 AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2312 USB_CH_DET, 0x00);
2313 /*Check link status*/
2314 if (is_ab8500(di->parent))
2315 ret = abx500_get_register_interruptible(di->dev,
2316 AB8500_USB, AB8500_USB_LINE_STAT_REG,
2317 &val);
2318 else
2319 ret = abx500_get_register_interruptible(di->dev,
2320 AB8500_USB, AB8500_USB_LINK1_STAT_REG,
2321 &val);
2322
2323 dev_dbg(di->dev, "USB link status= 0x%02x\n",
2324 (val & link_status) >> USB_LINK_STATUS_SHIFT);
2325 di->invalid_charger_detect_state = 2;
2326 }
2327 } else {
2328 di->invalid_charger_detect_state = 0;
2329 }
2330
2331 if (!(detected_chargers & USB_PW_CONN)) {
2332 di->vbus_detected = false;
2333 ab8500_charger_set_usb_connected(di, false);
2334 ab8500_power_supply_changed(di, di->usb_chg.psy);
2335 return;
2336 }
2337
2338 dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__);
2339 di->vbus_detected = true;
2340 ret = ab8500_charger_read_usb_type(di);
2341 if (ret) {
2342 if (ret == -ENXIO) {
2343 /* No valid charger type detected */
2344 ab8500_charger_set_usb_connected(di, false);
2345 ab8500_power_supply_changed(di, di->usb_chg.psy);
2346 }
2347 return;
2348 }
2349
2350 if (di->usb_device_is_unrecognised) {
2351 dev_dbg(di->dev,
2352 "Potential Legacy Charger device. "
2353 "Delay work for %d msec for USB enum "
2354 "to finish",
2355 WAIT_ACA_RID_ENUMERATION);
2356 queue_delayed_work(di->charger_wq,
2357 &di->attach_work,
2358 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2359 } else if (di->is_aca_rid == 1) {
2360 /* Only wait once */
2361 di->is_aca_rid++;
2362 dev_dbg(di->dev,
2363 "%s Wait %d msec for USB enum to finish",
2364 __func__, WAIT_ACA_RID_ENUMERATION);
2365 queue_delayed_work(di->charger_wq,
2366 &di->attach_work,
2367 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2368 } else {
2369 queue_delayed_work(di->charger_wq,
2370 &di->attach_work,
2371 0);
2372 }
2373 }
2374
2375 static void ab8500_charger_usb_state_changed_work(struct work_struct *work)
2376 {
2377 int ret;
2378 unsigned long flags;
2379
2380 struct ab8500_charger *di = container_of(work,
2381 struct ab8500_charger, usb_state_changed_work.work);
2382
2383 if (!di->vbus_detected) {
2384 dev_dbg(di->dev,
2385 "%s !di->vbus_detected\n",
2386 __func__);
2387 return;
2388 }
2389
2390 spin_lock_irqsave(&di->usb_state.usb_lock, flags);
2391 di->usb_state.state = di->usb_state.state_tmp;
2392 di->usb_state.usb_current = di->usb_state.usb_current_tmp;
2393 spin_unlock_irqrestore(&di->usb_state.usb_lock, flags);
2394
2395 dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n",
2396 __func__, di->usb_state.state, di->usb_state.usb_current);
2397
2398 switch (di->usb_state.state) {
2399 case AB8500_BM_USB_STATE_RESET_HS:
2400 case AB8500_BM_USB_STATE_RESET_FS:
2401 case AB8500_BM_USB_STATE_SUSPEND:
2402 case AB8500_BM_USB_STATE_MAX:
2403 ab8500_charger_set_usb_connected(di, false);
2404 ab8500_power_supply_changed(di, di->usb_chg.psy);
2405 break;
2406
2407 case AB8500_BM_USB_STATE_RESUME:
2408 /*
2409 * when suspend->resume there should be delay
2410 * of 1sec for enabling charging
2411 */
2412 msleep(1000);
2413 fallthrough;
2414 case AB8500_BM_USB_STATE_CONFIGURED:
2415 /*
2416 * USB is configured, enable charging with the charging
2417 * input current obtained from USB driver
2418 */
2419 if (!ab8500_charger_get_usb_cur(di)) {
2420 /* Update maximum input current */
2421 ret = ab8500_charger_set_vbus_in_curr(di,
2422 di->max_usb_in_curr.usb_type_max);
2423 if (ret)
2424 return;
2425
2426 ab8500_charger_set_usb_connected(di, true);
2427 ab8500_power_supply_changed(di, di->usb_chg.psy);
2428 }
2429 break;
2430
2431 default:
2432 break;
2433 }
2434 }
2435
2436 /**
2437 * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status
2438 * @work: pointer to the work_struct structure
2439 *
2440 * Work queue function for checking the USB charger Not OK status
2441 */
2442 static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work)
2443 {
2444 int ret;
2445 u8 reg_value;
2446 bool prev_status;
2447
2448 struct ab8500_charger *di = container_of(work,
2449 struct ab8500_charger, check_usbchgnotok_work.work);
2450
2451 /* Check if the status bit for usbchargernotok is still active */
2452 ret = abx500_get_register_interruptible(di->dev,
2453 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
2454 if (ret < 0) {
2455 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2456 return;
2457 }
2458 prev_status = di->flags.usbchargernotok;
2459
2460 if (reg_value & VBUS_CH_NOK) {
2461 di->flags.usbchargernotok = true;
2462 /* Check again in 1sec */
2463 queue_delayed_work(di->charger_wq,
2464 &di->check_usbchgnotok_work, HZ);
2465 } else {
2466 di->flags.usbchargernotok = false;
2467 di->flags.vbus_collapse = false;
2468 }
2469
2470 if (prev_status != di->flags.usbchargernotok)
2471 ab8500_power_supply_changed(di, di->usb_chg.psy);
2472 }
2473
2474 /**
2475 * ab8500_charger_check_main_thermal_prot_work() - check main thermal status
2476 * @work: pointer to the work_struct structure
2477 *
2478 * Work queue function for checking the Main thermal prot status
2479 */
2480 static void ab8500_charger_check_main_thermal_prot_work(
2481 struct work_struct *work)
2482 {
2483 int ret;
2484 u8 reg_value;
2485
2486 struct ab8500_charger *di = container_of(work,
2487 struct ab8500_charger, check_main_thermal_prot_work);
2488
2489 /* Check if the status bit for main_thermal_prot is still active */
2490 ret = abx500_get_register_interruptible(di->dev,
2491 AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
2492 if (ret < 0) {
2493 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2494 return;
2495 }
2496 if (reg_value & MAIN_CH_TH_PROT)
2497 di->flags.main_thermal_prot = true;
2498 else
2499 di->flags.main_thermal_prot = false;
2500
2501 ab8500_power_supply_changed(di, di->ac_chg.psy);
2502 }
2503
2504 /**
2505 * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status
2506 * @work: pointer to the work_struct structure
2507 *
2508 * Work queue function for checking the USB thermal prot status
2509 */
2510 static void ab8500_charger_check_usb_thermal_prot_work(
2511 struct work_struct *work)
2512 {
2513 int ret;
2514 u8 reg_value;
2515
2516 struct ab8500_charger *di = container_of(work,
2517 struct ab8500_charger, check_usb_thermal_prot_work);
2518
2519 /* Check if the status bit for usb_thermal_prot is still active */
2520 ret = abx500_get_register_interruptible(di->dev,
2521 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
2522 if (ret < 0) {
2523 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2524 return;
2525 }
2526 if (reg_value & USB_CH_TH_PROT)
2527 di->flags.usb_thermal_prot = true;
2528 else
2529 di->flags.usb_thermal_prot = false;
2530
2531 ab8500_power_supply_changed(di, di->usb_chg.psy);
2532 }
2533
2534 /**
2535 * ab8500_charger_mainchunplugdet_handler() - main charger unplugged
2536 * @irq: interrupt number
2537 * @_di: pointer to the ab8500_charger structure
2538 *
2539 * Returns IRQ status(IRQ_HANDLED)
2540 */
2541 static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di)
2542 {
2543 struct ab8500_charger *di = _di;
2544
2545 dev_dbg(di->dev, "Main charger unplugged\n");
2546 queue_work(di->charger_wq, &di->ac_work);
2547
2548 cancel_delayed_work_sync(&di->ac_charger_attached_work);
2549 mutex_lock(&di->charger_attached_mutex);
2550 mutex_unlock(&di->charger_attached_mutex);
2551
2552 return IRQ_HANDLED;
2553 }
2554
2555 /**
2556 * ab8500_charger_mainchplugdet_handler() - main charger plugged
2557 * @irq: interrupt number
2558 * @_di: pointer to the ab8500_charger structure
2559 *
2560 * Returns IRQ status(IRQ_HANDLED)
2561 */
2562 static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di)
2563 {
2564 struct ab8500_charger *di = _di;
2565
2566 dev_dbg(di->dev, "Main charger plugged\n");
2567 queue_work(di->charger_wq, &di->ac_work);
2568
2569 mutex_lock(&di->charger_attached_mutex);
2570 mutex_unlock(&di->charger_attached_mutex);
2571
2572 if (is_ab8500(di->parent))
2573 queue_delayed_work(di->charger_wq,
2574 &di->ac_charger_attached_work,
2575 HZ);
2576 return IRQ_HANDLED;
2577 }
2578
2579 /**
2580 * ab8500_charger_mainextchnotok_handler() - main charger not ok
2581 * @irq: interrupt number
2582 * @_di: pointer to the ab8500_charger structure
2583 *
2584 * Returns IRQ status(IRQ_HANDLED)
2585 */
2586 static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di)
2587 {
2588 struct ab8500_charger *di = _di;
2589
2590 dev_dbg(di->dev, "Main charger not ok\n");
2591 di->flags.mainextchnotok = true;
2592 ab8500_power_supply_changed(di, di->ac_chg.psy);
2593
2594 /* Schedule a new HW failure check */
2595 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2596
2597 return IRQ_HANDLED;
2598 }
2599
2600 /**
2601 * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger
2602 * thermal protection threshold
2603 * @irq: interrupt number
2604 * @_di: pointer to the ab8500_charger structure
2605 *
2606 * Returns IRQ status(IRQ_HANDLED)
2607 */
2608 static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di)
2609 {
2610 struct ab8500_charger *di = _di;
2611
2612 dev_dbg(di->dev,
2613 "Die temp above Main charger thermal protection threshold\n");
2614 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2615
2616 return IRQ_HANDLED;
2617 }
2618
2619 /**
2620 * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger
2621 * thermal protection threshold
2622 * @irq: interrupt number
2623 * @_di: pointer to the ab8500_charger structure
2624 *
2625 * Returns IRQ status(IRQ_HANDLED)
2626 */
2627 static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di)
2628 {
2629 struct ab8500_charger *di = _di;
2630
2631 dev_dbg(di->dev,
2632 "Die temp ok for Main charger thermal protection threshold\n");
2633 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2634
2635 return IRQ_HANDLED;
2636 }
2637
2638 static void ab8500_charger_vbus_drop_end_work(struct work_struct *work)
2639 {
2640 struct ab8500_charger *di = container_of(work,
2641 struct ab8500_charger, vbus_drop_end_work.work);
2642 int ret, curr;
2643 u8 reg_value;
2644
2645 di->flags.vbus_drop_end = false;
2646
2647 /* Reset the drop counter */
2648 abx500_set_register_interruptible(di->dev,
2649 AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01);
2650
2651 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
2652 AB8500_CH_USBCH_STAT2_REG, &reg_value);
2653 if (ret < 0) {
2654 dev_err(di->dev, "%s read failed\n", __func__);
2655 return;
2656 }
2657
2658 curr = di->bm->chg_input_curr[
2659 reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT];
2660
2661 if (di->max_usb_in_curr.calculated_max != curr) {
2662 /* USB source is collapsing */
2663 di->max_usb_in_curr.calculated_max = curr;
2664 dev_dbg(di->dev,
2665 "VBUS input current limiting to %d mA\n",
2666 di->max_usb_in_curr.calculated_max);
2667 } else {
2668 /*
2669 * USB source can not give more than this amount.
2670 * Taking more will collapse the source.
2671 */
2672 di->max_usb_in_curr.set_max =
2673 di->max_usb_in_curr.calculated_max;
2674 dev_dbg(di->dev,
2675 "VBUS input current limited to %d mA\n",
2676 di->max_usb_in_curr.set_max);
2677 }
2678
2679 if (di->usb.charger_connected)
2680 ab8500_charger_set_vbus_in_curr(di,
2681 di->max_usb_in_curr.usb_type_max);
2682 }
2683
2684 /**
2685 * ab8500_charger_vbusdetf_handler() - VBUS falling detected
2686 * @irq: interrupt number
2687 * @_di: pointer to the ab8500_charger structure
2688 *
2689 * Returns IRQ status(IRQ_HANDLED)
2690 */
2691 static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di)
2692 {
2693 struct ab8500_charger *di = _di;
2694
2695 di->vbus_detected = false;
2696 dev_dbg(di->dev, "VBUS falling detected\n");
2697 queue_work(di->charger_wq, &di->detect_usb_type_work);
2698
2699 return IRQ_HANDLED;
2700 }
2701
2702 /**
2703 * ab8500_charger_vbusdetr_handler() - VBUS rising detected
2704 * @irq: interrupt number
2705 * @_di: pointer to the ab8500_charger structure
2706 *
2707 * Returns IRQ status(IRQ_HANDLED)
2708 */
2709 static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di)
2710 {
2711 struct ab8500_charger *di = _di;
2712
2713 di->vbus_detected = true;
2714 dev_dbg(di->dev, "VBUS rising detected\n");
2715
2716 queue_work(di->charger_wq, &di->detect_usb_type_work);
2717
2718 return IRQ_HANDLED;
2719 }
2720
2721 /**
2722 * ab8500_charger_usblinkstatus_handler() - USB link status has changed
2723 * @irq: interrupt number
2724 * @_di: pointer to the ab8500_charger structure
2725 *
2726 * Returns IRQ status(IRQ_HANDLED)
2727 */
2728 static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di)
2729 {
2730 struct ab8500_charger *di = _di;
2731
2732 dev_dbg(di->dev, "USB link status changed\n");
2733
2734 queue_work(di->charger_wq, &di->usb_link_status_work);
2735
2736 return IRQ_HANDLED;
2737 }
2738
2739 /**
2740 * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger
2741 * thermal protection threshold
2742 * @irq: interrupt number
2743 * @_di: pointer to the ab8500_charger structure
2744 *
2745 * Returns IRQ status(IRQ_HANDLED)
2746 */
2747 static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di)
2748 {
2749 struct ab8500_charger *di = _di;
2750
2751 dev_dbg(di->dev,
2752 "Die temp above USB charger thermal protection threshold\n");
2753 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2754
2755 return IRQ_HANDLED;
2756 }
2757
2758 /**
2759 * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger
2760 * thermal protection threshold
2761 * @irq: interrupt number
2762 * @_di: pointer to the ab8500_charger structure
2763 *
2764 * Returns IRQ status(IRQ_HANDLED)
2765 */
2766 static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di)
2767 {
2768 struct ab8500_charger *di = _di;
2769
2770 dev_dbg(di->dev,
2771 "Die temp ok for USB charger thermal protection threshold\n");
2772 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2773
2774 return IRQ_HANDLED;
2775 }
2776
2777 /**
2778 * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected
2779 * @irq: interrupt number
2780 * @_di: pointer to the ab8500_charger structure
2781 *
2782 * Returns IRQ status(IRQ_HANDLED)
2783 */
2784 static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di)
2785 {
2786 struct ab8500_charger *di = _di;
2787
2788 dev_dbg(di->dev, "Not allowed USB charger detected\n");
2789 queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0);
2790
2791 return IRQ_HANDLED;
2792 }
2793
2794 /**
2795 * ab8500_charger_chwdexp_handler() - Charger watchdog expired
2796 * @irq: interrupt number
2797 * @_di: pointer to the ab8500_charger structure
2798 *
2799 * Returns IRQ status(IRQ_HANDLED)
2800 */
2801 static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di)
2802 {
2803 struct ab8500_charger *di = _di;
2804
2805 dev_dbg(di->dev, "Charger watchdog expired\n");
2806
2807 /*
2808 * The charger that was online when the watchdog expired
2809 * needs to be restarted for charging to start again
2810 */
2811 if (di->ac.charger_online) {
2812 di->ac.wd_expired = true;
2813 ab8500_power_supply_changed(di, di->ac_chg.psy);
2814 }
2815 if (di->usb.charger_online) {
2816 di->usb.wd_expired = true;
2817 ab8500_power_supply_changed(di, di->usb_chg.psy);
2818 }
2819
2820 return IRQ_HANDLED;
2821 }
2822
2823 /**
2824 * ab8500_charger_vbuschdropend_handler() - VBUS drop removed
2825 * @irq: interrupt number
2826 * @_di: pointer to the ab8500_charger structure
2827 *
2828 * Returns IRQ status(IRQ_HANDLED)
2829 */
2830 static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di)
2831 {
2832 struct ab8500_charger *di = _di;
2833
2834 dev_dbg(di->dev, "VBUS charger drop ended\n");
2835 di->flags.vbus_drop_end = true;
2836
2837 /*
2838 * VBUS might have dropped due to bad connection.
2839 * Schedule a new input limit set to the value SW requests.
2840 */
2841 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work,
2842 round_jiffies(VBUS_IN_CURR_LIM_RETRY_SET_TIME * HZ));
2843
2844 return IRQ_HANDLED;
2845 }
2846
2847 /**
2848 * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected
2849 * @irq: interrupt number
2850 * @_di: pointer to the ab8500_charger structure
2851 *
2852 * Returns IRQ status(IRQ_HANDLED)
2853 */
2854 static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di)
2855 {
2856 struct ab8500_charger *di = _di;
2857
2858 dev_dbg(di->dev, "VBUS overvoltage detected\n");
2859 di->flags.vbus_ovv = true;
2860 ab8500_power_supply_changed(di, di->usb_chg.psy);
2861
2862 /* Schedule a new HW failure check */
2863 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2864
2865 return IRQ_HANDLED;
2866 }
2867
2868 /**
2869 * ab8500_charger_ac_get_property() - get the ac/mains properties
2870 * @psy: pointer to the power_supply structure
2871 * @psp: pointer to the power_supply_property structure
2872 * @val: pointer to the power_supply_propval union
2873 *
2874 * This function gets called when an application tries to get the ac/mains
2875 * properties by reading the sysfs files.
2876 * AC/Mains properties are online, present and voltage.
2877 * online: ac/mains charging is in progress or not
2878 * present: presence of the ac/mains
2879 * voltage: AC/Mains voltage
2880 * Returns error code in case of failure else 0(on success)
2881 */
2882 static int ab8500_charger_ac_get_property(struct power_supply *psy,
2883 enum power_supply_property psp,
2884 union power_supply_propval *val)
2885 {
2886 struct ab8500_charger *di;
2887 int ret;
2888
2889 di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy));
2890
2891 switch (psp) {
2892 case POWER_SUPPLY_PROP_HEALTH:
2893 if (di->flags.mainextchnotok)
2894 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2895 else if (di->ac.wd_expired || di->usb.wd_expired)
2896 val->intval = POWER_SUPPLY_HEALTH_DEAD;
2897 else if (di->flags.main_thermal_prot)
2898 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2899 else
2900 val->intval = POWER_SUPPLY_HEALTH_GOOD;
2901 break;
2902 case POWER_SUPPLY_PROP_ONLINE:
2903 val->intval = di->ac.charger_online;
2904 break;
2905 case POWER_SUPPLY_PROP_PRESENT:
2906 val->intval = di->ac.charger_connected;
2907 break;
2908 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2909 ret = ab8500_charger_get_ac_voltage(di);
2910 if (ret >= 0)
2911 di->ac.charger_voltage = ret;
2912 /* On error, use previous value */
2913 val->intval = di->ac.charger_voltage * 1000;
2914 break;
2915 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2916 /*
2917 * This property is used to indicate when CV mode is entered
2918 * for the AC charger
2919 */
2920 di->ac.cv_active = ab8500_charger_ac_cv(di);
2921 val->intval = di->ac.cv_active;
2922 break;
2923 case POWER_SUPPLY_PROP_CURRENT_NOW:
2924 ret = ab8500_charger_get_ac_current(di);
2925 if (ret >= 0)
2926 di->ac.charger_current = ret;
2927 val->intval = di->ac.charger_current * 1000;
2928 break;
2929 default:
2930 return -EINVAL;
2931 }
2932 return 0;
2933 }
2934
2935 /**
2936 * ab8500_charger_usb_get_property() - get the usb properties
2937 * @psy: pointer to the power_supply structure
2938 * @psp: pointer to the power_supply_property structure
2939 * @val: pointer to the power_supply_propval union
2940 *
2941 * This function gets called when an application tries to get the usb
2942 * properties by reading the sysfs files.
2943 * USB properties are online, present and voltage.
2944 * online: usb charging is in progress or not
2945 * present: presence of the usb
2946 * voltage: vbus voltage
2947 * Returns error code in case of failure else 0(on success)
2948 */
2949 static int ab8500_charger_usb_get_property(struct power_supply *psy,
2950 enum power_supply_property psp,
2951 union power_supply_propval *val)
2952 {
2953 struct ab8500_charger *di;
2954 int ret;
2955
2956 di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy));
2957
2958 switch (psp) {
2959 case POWER_SUPPLY_PROP_HEALTH:
2960 if (di->flags.usbchargernotok)
2961 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2962 else if (di->ac.wd_expired || di->usb.wd_expired)
2963 val->intval = POWER_SUPPLY_HEALTH_DEAD;
2964 else if (di->flags.usb_thermal_prot)
2965 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2966 else if (di->flags.vbus_ovv)
2967 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
2968 else
2969 val->intval = POWER_SUPPLY_HEALTH_GOOD;
2970 break;
2971 case POWER_SUPPLY_PROP_ONLINE:
2972 val->intval = di->usb.charger_online;
2973 break;
2974 case POWER_SUPPLY_PROP_PRESENT:
2975 val->intval = di->usb.charger_connected;
2976 break;
2977 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2978 ret = ab8500_charger_get_vbus_voltage(di);
2979 if (ret >= 0)
2980 di->usb.charger_voltage = ret;
2981 val->intval = di->usb.charger_voltage * 1000;
2982 break;
2983 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2984 /*
2985 * This property is used to indicate when CV mode is entered
2986 * for the USB charger
2987 */
2988 di->usb.cv_active = ab8500_charger_usb_cv(di);
2989 val->intval = di->usb.cv_active;
2990 break;
2991 case POWER_SUPPLY_PROP_CURRENT_NOW:
2992 ret = ab8500_charger_get_usb_current(di);
2993 if (ret >= 0)
2994 di->usb.charger_current = ret;
2995 val->intval = di->usb.charger_current * 1000;
2996 break;
2997 case POWER_SUPPLY_PROP_CURRENT_AVG:
2998 /*
2999 * This property is used to indicate when VBUS has collapsed
3000 * due to too high output current from the USB charger
3001 */
3002 if (di->flags.vbus_collapse)
3003 val->intval = 1;
3004 else
3005 val->intval = 0;
3006 break;
3007 default:
3008 return -EINVAL;
3009 }
3010 return 0;
3011 }
3012
3013 /**
3014 * ab8500_charger_init_hw_registers() - Set up charger related registers
3015 * @di: pointer to the ab8500_charger structure
3016 *
3017 * Set up charger OVV, watchdog and maximum voltage registers as well as
3018 * charging of the backup battery
3019 */
3020 static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
3021 {
3022 int ret = 0;
3023
3024 /* Setup maximum charger current and voltage for ABB cut2.0 */
3025 if (!is_ab8500_1p1_or_earlier(di->parent)) {
3026 ret = abx500_set_register_interruptible(di->dev,
3027 AB8500_CHARGER,
3028 AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6);
3029 if (ret) {
3030 dev_err(di->dev,
3031 "failed to set CH_VOLT_LVL_MAX_REG\n");
3032 goto out;
3033 }
3034
3035 ret = abx500_set_register_interruptible(di->dev,
3036 AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
3037 CH_OP_CUR_LVL_1P6);
3038 if (ret) {
3039 dev_err(di->dev,
3040 "failed to set CH_OPT_CRNTLVL_MAX_REG\n");
3041 goto out;
3042 }
3043 }
3044
3045 if (is_ab8505_2p0(di->parent))
3046 ret = abx500_mask_and_set_register_interruptible(di->dev,
3047 AB8500_CHARGER,
3048 AB8500_USBCH_CTRL2_REG,
3049 VBUS_AUTO_IN_CURR_LIM_ENA,
3050 VBUS_AUTO_IN_CURR_LIM_ENA);
3051 else
3052 /*
3053 * VBUS OVV set to 6.3V and enable automatic current limitation
3054 */
3055 ret = abx500_set_register_interruptible(di->dev,
3056 AB8500_CHARGER,
3057 AB8500_USBCH_CTRL2_REG,
3058 VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA);
3059 if (ret) {
3060 dev_err(di->dev,
3061 "failed to set automatic current limitation\n");
3062 goto out;
3063 }
3064
3065 /* Enable main watchdog in OTP */
3066 ret = abx500_set_register_interruptible(di->dev,
3067 AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD);
3068 if (ret) {
3069 dev_err(di->dev, "failed to enable main WD in OTP\n");
3070 goto out;
3071 }
3072
3073 /* Enable main watchdog */
3074 ret = abx500_set_register_interruptible(di->dev,
3075 AB8500_SYS_CTRL2_BLOCK,
3076 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA);
3077 if (ret) {
3078 dev_err(di->dev, "failed to enable main watchdog\n");
3079 goto out;
3080 }
3081
3082 /*
3083 * Due to internal synchronisation, Enable and Kick watchdog bits
3084 * cannot be enabled in a single write.
3085 * A minimum delay of 2*32 kHz period (62.5µs) must be inserted
3086 * between writing Enable then Kick bits.
3087 */
3088 udelay(63);
3089
3090 /* Kick main watchdog */
3091 ret = abx500_set_register_interruptible(di->dev,
3092 AB8500_SYS_CTRL2_BLOCK,
3093 AB8500_MAIN_WDOG_CTRL_REG,
3094 (MAIN_WDOG_ENA | MAIN_WDOG_KICK));
3095 if (ret) {
3096 dev_err(di->dev, "failed to kick main watchdog\n");
3097 goto out;
3098 }
3099
3100 /* Disable main watchdog */
3101 ret = abx500_set_register_interruptible(di->dev,
3102 AB8500_SYS_CTRL2_BLOCK,
3103 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS);
3104 if (ret) {
3105 dev_err(di->dev, "failed to disable main watchdog\n");
3106 goto out;
3107 }
3108
3109 /* Set watchdog timeout */
3110 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3111 AB8500_CH_WD_TIMER_REG, WD_TIMER);
3112 if (ret) {
3113 dev_err(di->dev, "failed to set charger watchdog timeout\n");
3114 goto out;
3115 }
3116
3117 ret = ab8500_charger_led_en(di, false);
3118 if (ret < 0) {
3119 dev_err(di->dev, "failed to disable LED\n");
3120 goto out;
3121 }
3122
3123 ret = abx500_set_register_interruptible(di->dev,
3124 AB8500_RTC,
3125 AB8500_RTC_BACKUP_CHG_REG,
3126 (di->bm->bkup_bat_v & 0x3) | di->bm->bkup_bat_i);
3127 if (ret) {
3128 dev_err(di->dev, "failed to setup backup battery charging\n");
3129 goto out;
3130 }
3131
3132 /* Enable backup battery charging */
3133 ret = abx500_mask_and_set_register_interruptible(di->dev,
3134 AB8500_RTC, AB8500_RTC_CTRL_REG,
3135 RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
3136 if (ret < 0) {
3137 dev_err(di->dev, "%s mask and set failed\n", __func__);
3138 goto out;
3139 }
3140
3141 out:
3142 return ret;
3143 }
3144
3145 /*
3146 * ab8500 charger driver interrupts and their respective isr
3147 */
3148 static struct ab8500_charger_interrupts ab8500_charger_irq[] = {
3149 {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler},
3150 {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler},
3151 {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler},
3152 {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler},
3153 {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler},
3154 {"VBUS_DET_F", ab8500_charger_vbusdetf_handler},
3155 {"VBUS_DET_R", ab8500_charger_vbusdetr_handler},
3156 {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler},
3157 {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler},
3158 {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler},
3159 {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler},
3160 {"VBUS_OVV", ab8500_charger_vbusovv_handler},
3161 {"CH_WD_EXP", ab8500_charger_chwdexp_handler},
3162 {"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler},
3163 };
3164
3165 static int ab8500_charger_usb_notifier_call(struct notifier_block *nb,
3166 unsigned long event, void *power)
3167 {
3168 struct ab8500_charger *di =
3169 container_of(nb, struct ab8500_charger, nb);
3170 enum ab8500_usb_state bm_usb_state;
3171 unsigned mA = *((unsigned *)power);
3172
3173 if (!di)
3174 return NOTIFY_DONE;
3175
3176 if (event != USB_EVENT_VBUS) {
3177 dev_dbg(di->dev, "not a standard host, returning\n");
3178 return NOTIFY_DONE;
3179 }
3180
3181 /* TODO: State is fabricate here. See if charger really needs USB
3182 * state or if mA is enough
3183 */
3184 if ((di->usb_state.usb_current == 2) && (mA > 2))
3185 bm_usb_state = AB8500_BM_USB_STATE_RESUME;
3186 else if (mA == 0)
3187 bm_usb_state = AB8500_BM_USB_STATE_RESET_HS;
3188 else if (mA == 2)
3189 bm_usb_state = AB8500_BM_USB_STATE_SUSPEND;
3190 else if (mA >= 8) /* 8, 100, 500 */
3191 bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED;
3192 else /* Should never occur */
3193 bm_usb_state = AB8500_BM_USB_STATE_RESET_FS;
3194
3195 dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n",
3196 __func__, bm_usb_state, mA);
3197
3198 spin_lock(&di->usb_state.usb_lock);
3199 di->usb_state.state_tmp = bm_usb_state;
3200 di->usb_state.usb_current_tmp = mA;
3201 spin_unlock(&di->usb_state.usb_lock);
3202
3203 /*
3204 * wait for some time until you get updates from the usb stack
3205 * and negotiations are completed
3206 */
3207 queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2);
3208
3209 return NOTIFY_OK;
3210 }
3211
3212 static int __maybe_unused ab8500_charger_resume(struct device *dev)
3213 {
3214 int ret;
3215 struct ab8500_charger *di = dev_get_drvdata(dev);
3216
3217 /*
3218 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3219 * logic. That means we have to continuously kick the charger
3220 * watchdog even when no charger is connected. This is only
3221 * valid once the AC charger has been enabled. This is
3222 * a bug that is not handled by the algorithm and the
3223 * watchdog have to be kicked by the charger driver
3224 * when the AC charger is disabled
3225 */
3226 if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) {
3227 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3228 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
3229 if (ret)
3230 dev_err(di->dev, "Failed to kick WD!\n");
3231
3232 /* If not already pending start a new timer */
3233 queue_delayed_work(di->charger_wq, &di->kick_wd_work,
3234 round_jiffies(WD_KICK_INTERVAL));
3235 }
3236
3237 /* If we still have a HW failure, schedule a new check */
3238 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
3239 queue_delayed_work(di->charger_wq,
3240 &di->check_hw_failure_work, 0);
3241 }
3242
3243 if (di->flags.vbus_drop_end)
3244 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0);
3245
3246 return 0;
3247 }
3248
3249 static int __maybe_unused ab8500_charger_suspend(struct device *dev)
3250 {
3251 struct ab8500_charger *di = dev_get_drvdata(dev);
3252
3253 /* Cancel any pending jobs */
3254 cancel_delayed_work(&di->check_hw_failure_work);
3255 cancel_delayed_work(&di->vbus_drop_end_work);
3256
3257 flush_delayed_work(&di->attach_work);
3258 flush_delayed_work(&di->usb_charger_attached_work);
3259 flush_delayed_work(&di->ac_charger_attached_work);
3260 flush_delayed_work(&di->check_usbchgnotok_work);
3261 flush_delayed_work(&di->check_vbat_work);
3262 flush_delayed_work(&di->kick_wd_work);
3263
3264 flush_work(&di->usb_link_status_work);
3265 flush_work(&di->ac_work);
3266 flush_work(&di->detect_usb_type_work);
3267
3268 if (atomic_read(&di->current_stepping_sessions))
3269 return -EAGAIN;
3270
3271 return 0;
3272 }
3273
3274 static struct notifier_block charger_nb = {
3275 .notifier_call = ab8500_external_charger_prepare,
3276 };
3277
3278 static int ab8500_charger_remove(struct platform_device *pdev)
3279 {
3280 struct ab8500_charger *di = platform_get_drvdata(pdev);
3281 int i, irq, ret;
3282
3283 /* Disable AC charging */
3284 ab8500_charger_ac_en(&di->ac_chg, false, 0, 0);
3285
3286 /* Disable USB charging */
3287 ab8500_charger_usb_en(&di->usb_chg, false, 0, 0);
3288
3289 /* Disable interrupts */
3290 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
3291 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3292 free_irq(irq, di);
3293 }
3294
3295 /* Backup battery voltage and current disable */
3296 ret = abx500_mask_and_set_register_interruptible(di->dev,
3297 AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0);
3298 if (ret < 0)
3299 dev_err(di->dev, "%s mask and set failed\n", __func__);
3300
3301 usb_unregister_notifier(di->usb_phy, &di->nb);
3302 usb_put_phy(di->usb_phy);
3303
3304 /* Delete the work queue */
3305 destroy_workqueue(di->charger_wq);
3306
3307 /* Unregister external charger enable notifier */
3308 if (!di->ac_chg.enabled)
3309 blocking_notifier_chain_unregister(
3310 &charger_notifier_list, &charger_nb);
3311
3312 flush_scheduled_work();
3313 if (di->usb_chg.enabled)
3314 power_supply_unregister(di->usb_chg.psy);
3315
3316 if (di->ac_chg.enabled && !di->ac_chg.external)
3317 power_supply_unregister(di->ac_chg.psy);
3318
3319 return 0;
3320 }
3321
3322 static char *supply_interface[] = {
3323 "ab8500_chargalg",
3324 "ab8500_fg",
3325 "ab8500_btemp",
3326 };
3327
3328 static const struct power_supply_desc ab8500_ac_chg_desc = {
3329 .name = "ab8500_ac",
3330 .type = POWER_SUPPLY_TYPE_MAINS,
3331 .properties = ab8500_charger_ac_props,
3332 .num_properties = ARRAY_SIZE(ab8500_charger_ac_props),
3333 .get_property = ab8500_charger_ac_get_property,
3334 };
3335
3336 static const struct power_supply_desc ab8500_usb_chg_desc = {
3337 .name = "ab8500_usb",
3338 .type = POWER_SUPPLY_TYPE_USB,
3339 .properties = ab8500_charger_usb_props,
3340 .num_properties = ARRAY_SIZE(ab8500_charger_usb_props),
3341 .get_property = ab8500_charger_usb_get_property,
3342 };
3343
3344 static int ab8500_charger_probe(struct platform_device *pdev)
3345 {
3346 struct device_node *np = pdev->dev.of_node;
3347 struct abx500_bm_data *plat = pdev->dev.platform_data;
3348 struct power_supply_config ac_psy_cfg = {}, usb_psy_cfg = {};
3349 struct ab8500_charger *di;
3350 int irq, i, charger_status, ret = 0, ch_stat;
3351 struct device *dev = &pdev->dev;
3352
3353 di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
3354 if (!di)
3355 return -ENOMEM;
3356
3357 if (!plat) {
3358 dev_err(dev, "no battery management data supplied\n");
3359 return -EINVAL;
3360 }
3361 di->bm = plat;
3362
3363 if (np) {
3364 ret = ab8500_bm_of_probe(dev, np, di->bm);
3365 if (ret) {
3366 dev_err(dev, "failed to get battery information\n");
3367 return ret;
3368 }
3369 di->autopower_cfg = of_property_read_bool(np, "autopower_cfg");
3370 } else
3371 di->autopower_cfg = false;
3372
3373 /* get parent data */
3374 di->dev = dev;
3375 di->parent = dev_get_drvdata(pdev->dev.parent);
3376
3377 /* Get ADC channels */
3378 di->adc_main_charger_v = devm_iio_channel_get(dev, "main_charger_v");
3379 if (IS_ERR(di->adc_main_charger_v)) {
3380 ret = dev_err_probe(dev, PTR_ERR(di->adc_main_charger_v),
3381 "failed to get ADC main charger voltage\n");
3382 return ret;
3383 }
3384 di->adc_main_charger_c = devm_iio_channel_get(dev, "main_charger_c");
3385 if (IS_ERR(di->adc_main_charger_c)) {
3386 ret = dev_err_probe(dev, PTR_ERR(di->adc_main_charger_c),
3387 "failed to get ADC main charger current\n");
3388 return ret;
3389 }
3390 di->adc_vbus_v = devm_iio_channel_get(dev, "vbus_v");
3391 if (IS_ERR(di->adc_vbus_v)) {
3392 ret = dev_err_probe(dev, PTR_ERR(di->adc_vbus_v),
3393 "failed to get ADC USB charger voltage\n");
3394 return ret;
3395 }
3396 di->adc_usb_charger_c = devm_iio_channel_get(dev, "usb_charger_c");
3397 if (IS_ERR(di->adc_usb_charger_c)) {
3398 ret = dev_err_probe(dev, PTR_ERR(di->adc_usb_charger_c),
3399 "failed to get ADC USB charger current\n");
3400 return ret;
3401 }
3402
3403 /* initialize lock */
3404 spin_lock_init(&di->usb_state.usb_lock);
3405 mutex_init(&di->usb_ipt_crnt_lock);
3406
3407 di->autopower = false;
3408 di->invalid_charger_detect_state = 0;
3409
3410 /* AC and USB supply config */
3411 ac_psy_cfg.supplied_to = supply_interface;
3412 ac_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
3413 ac_psy_cfg.drv_data = &di->ac_chg;
3414 usb_psy_cfg.supplied_to = supply_interface;
3415 usb_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
3416 usb_psy_cfg.drv_data = &di->usb_chg;
3417
3418 /* AC supply */
3419 /* ux500_charger sub-class */
3420 di->ac_chg.ops.enable = &ab8500_charger_ac_en;
3421 di->ac_chg.ops.check_enable = &ab8500_charger_ac_check_enable;
3422 di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3423 di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3424 di->ac_chg.max_out_volt = ab8500_charger_voltage_map[
3425 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3426 di->ac_chg.max_out_curr =
3427 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3428 di->ac_chg.wdt_refresh = CHG_WD_INTERVAL;
3429 di->ac_chg.enabled = di->bm->ac_enabled;
3430 di->ac_chg.external = false;
3431
3432 /*notifier for external charger enabling*/
3433 if (!di->ac_chg.enabled)
3434 blocking_notifier_chain_register(
3435 &charger_notifier_list, &charger_nb);
3436
3437 /* USB supply */
3438 /* ux500_charger sub-class */
3439 di->usb_chg.ops.enable = &ab8500_charger_usb_en;
3440 di->usb_chg.ops.check_enable = &ab8500_charger_usb_check_enable;
3441 di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3442 di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3443 di->usb_chg.max_out_volt = ab8500_charger_voltage_map[
3444 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3445 di->usb_chg.max_out_curr =
3446 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3447 di->usb_chg.wdt_refresh = CHG_WD_INTERVAL;
3448 di->usb_chg.enabled = di->bm->usb_enabled;
3449 di->usb_chg.external = false;
3450 di->usb_state.usb_current = -1;
3451
3452 /* Create a work queue for the charger */
3453 di->charger_wq = alloc_ordered_workqueue("ab8500_charger_wq",
3454 WQ_MEM_RECLAIM);
3455 if (di->charger_wq == NULL) {
3456 dev_err(dev, "failed to create work queue\n");
3457 return -ENOMEM;
3458 }
3459
3460 mutex_init(&di->charger_attached_mutex);
3461
3462 /* Init work for HW failure check */
3463 INIT_DEFERRABLE_WORK(&di->check_hw_failure_work,
3464 ab8500_charger_check_hw_failure_work);
3465 INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work,
3466 ab8500_charger_check_usbchargernotok_work);
3467
3468 INIT_DELAYED_WORK(&di->ac_charger_attached_work,
3469 ab8500_charger_ac_attached_work);
3470 INIT_DELAYED_WORK(&di->usb_charger_attached_work,
3471 ab8500_charger_usb_attached_work);
3472
3473 /*
3474 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3475 * logic. That means we have to continuously kick the charger
3476 * watchdog even when no charger is connected. This is only
3477 * valid once the AC charger has been enabled. This is
3478 * a bug that is not handled by the algorithm and the
3479 * watchdog have to be kicked by the charger driver
3480 * when the AC charger is disabled
3481 */
3482 INIT_DEFERRABLE_WORK(&di->kick_wd_work,
3483 ab8500_charger_kick_watchdog_work);
3484
3485 INIT_DEFERRABLE_WORK(&di->check_vbat_work,
3486 ab8500_charger_check_vbat_work);
3487
3488 INIT_DELAYED_WORK(&di->attach_work,
3489 ab8500_charger_usb_link_attach_work);
3490
3491 INIT_DELAYED_WORK(&di->usb_state_changed_work,
3492 ab8500_charger_usb_state_changed_work);
3493
3494 INIT_DELAYED_WORK(&di->vbus_drop_end_work,
3495 ab8500_charger_vbus_drop_end_work);
3496
3497 /* Init work for charger detection */
3498 INIT_WORK(&di->usb_link_status_work,
3499 ab8500_charger_usb_link_status_work);
3500 INIT_WORK(&di->ac_work, ab8500_charger_ac_work);
3501 INIT_WORK(&di->detect_usb_type_work,
3502 ab8500_charger_detect_usb_type_work);
3503
3504 /* Init work for checking HW status */
3505 INIT_WORK(&di->check_main_thermal_prot_work,
3506 ab8500_charger_check_main_thermal_prot_work);
3507 INIT_WORK(&di->check_usb_thermal_prot_work,
3508 ab8500_charger_check_usb_thermal_prot_work);
3509
3510 /*
3511 * VDD ADC supply needs to be enabled from this driver when there
3512 * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
3513 * interrupts during charging
3514 */
3515 di->regu = devm_regulator_get(dev, "vddadc");
3516 if (IS_ERR(di->regu)) {
3517 ret = PTR_ERR(di->regu);
3518 dev_err(dev, "failed to get vddadc regulator\n");
3519 goto free_charger_wq;
3520 }
3521
3522
3523 /* Initialize OVV, and other registers */
3524 ret = ab8500_charger_init_hw_registers(di);
3525 if (ret) {
3526 dev_err(dev, "failed to initialize ABB registers\n");
3527 goto free_charger_wq;
3528 }
3529
3530 /* Register AC charger class */
3531 if (di->ac_chg.enabled) {
3532 di->ac_chg.psy = power_supply_register(dev,
3533 &ab8500_ac_chg_desc,
3534 &ac_psy_cfg);
3535 if (IS_ERR(di->ac_chg.psy)) {
3536 dev_err(dev, "failed to register AC charger\n");
3537 ret = PTR_ERR(di->ac_chg.psy);
3538 goto free_charger_wq;
3539 }
3540 }
3541
3542 /* Register USB charger class */
3543 if (di->usb_chg.enabled) {
3544 di->usb_chg.psy = power_supply_register(dev,
3545 &ab8500_usb_chg_desc,
3546 &usb_psy_cfg);
3547 if (IS_ERR(di->usb_chg.psy)) {
3548 dev_err(dev, "failed to register USB charger\n");
3549 ret = PTR_ERR(di->usb_chg.psy);
3550 goto free_ac;
3551 }
3552 }
3553
3554 di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
3555 if (IS_ERR_OR_NULL(di->usb_phy)) {
3556 dev_err(dev, "failed to get usb transceiver\n");
3557 ret = -EINVAL;
3558 goto free_usb;
3559 }
3560 di->nb.notifier_call = ab8500_charger_usb_notifier_call;
3561 ret = usb_register_notifier(di->usb_phy, &di->nb);
3562 if (ret) {
3563 dev_err(dev, "failed to register usb notifier\n");
3564 goto put_usb_phy;
3565 }
3566
3567 /* Identify the connected charger types during startup */
3568 charger_status = ab8500_charger_detect_chargers(di, true);
3569 if (charger_status & AC_PW_CONN) {
3570 di->ac.charger_connected = 1;
3571 di->ac_conn = true;
3572 ab8500_power_supply_changed(di, di->ac_chg.psy);
3573 sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
3574 }
3575
3576 if (charger_status & USB_PW_CONN) {
3577 di->vbus_detected = true;
3578 di->vbus_detected_start = true;
3579 queue_work(di->charger_wq,
3580 &di->detect_usb_type_work);
3581 }
3582
3583 /* Register interrupts */
3584 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
3585 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3586 if (irq < 0) {
3587 ret = irq;
3588 goto free_irq;
3589 }
3590
3591 ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr,
3592 IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT,
3593 ab8500_charger_irq[i].name, di);
3594
3595 if (ret != 0) {
3596 dev_err(dev, "failed to request %s IRQ %d: %d\n"
3597 , ab8500_charger_irq[i].name, irq, ret);
3598 goto free_irq;
3599 }
3600 dev_dbg(dev, "Requested %s IRQ %d: %d\n",
3601 ab8500_charger_irq[i].name, irq, ret);
3602 }
3603
3604 platform_set_drvdata(pdev, di);
3605
3606 mutex_lock(&di->charger_attached_mutex);
3607
3608 ch_stat = ab8500_charger_detect_chargers(di, false);
3609
3610 if ((ch_stat & AC_PW_CONN) == AC_PW_CONN) {
3611 if (is_ab8500(di->parent))
3612 queue_delayed_work(di->charger_wq,
3613 &di->ac_charger_attached_work,
3614 HZ);
3615 }
3616 if ((ch_stat & USB_PW_CONN) == USB_PW_CONN) {
3617 if (is_ab8500(di->parent))
3618 queue_delayed_work(di->charger_wq,
3619 &di->usb_charger_attached_work,
3620 HZ);
3621 }
3622
3623 mutex_unlock(&di->charger_attached_mutex);
3624
3625 return ret;
3626
3627 free_irq:
3628 usb_unregister_notifier(di->usb_phy, &di->nb);
3629
3630 /* We also have to free all successfully registered irqs */
3631 for (i = i - 1; i >= 0; i--) {
3632 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3633 free_irq(irq, di);
3634 }
3635 put_usb_phy:
3636 usb_put_phy(di->usb_phy);
3637 free_usb:
3638 if (di->usb_chg.enabled)
3639 power_supply_unregister(di->usb_chg.psy);
3640 free_ac:
3641 if (di->ac_chg.enabled)
3642 power_supply_unregister(di->ac_chg.psy);
3643 free_charger_wq:
3644 destroy_workqueue(di->charger_wq);
3645 return ret;
3646 }
3647
3648 static SIMPLE_DEV_PM_OPS(ab8500_charger_pm_ops, ab8500_charger_suspend, ab8500_charger_resume);
3649
3650 static const struct of_device_id ab8500_charger_match[] = {
3651 { .compatible = "stericsson,ab8500-charger", },
3652 { },
3653 };
3654
3655 static struct platform_driver ab8500_charger_driver = {
3656 .probe = ab8500_charger_probe,
3657 .remove = ab8500_charger_remove,
3658 .driver = {
3659 .name = "ab8500-charger",
3660 .of_match_table = ab8500_charger_match,
3661 .pm = &ab8500_charger_pm_ops,
3662 },
3663 };
3664
3665 static int __init ab8500_charger_init(void)
3666 {
3667 return platform_driver_register(&ab8500_charger_driver);
3668 }
3669
3670 static void __exit ab8500_charger_exit(void)
3671 {
3672 platform_driver_unregister(&ab8500_charger_driver);
3673 }
3674
3675 subsys_initcall_sync(ab8500_charger_init);
3676 module_exit(ab8500_charger_exit);
3677
3678 MODULE_LICENSE("GPL v2");
3679 MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
3680 MODULE_ALIAS("platform:ab8500-charger");
3681 MODULE_DESCRIPTION("AB8500 charger management driver");
Linux with added FPC-III support