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