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/component.h>
17 #include <linux/interrupt.h>
18 #include <linux/delay.h>
19 #include <linux/notifier.h>
20 #include <linux/slab.h>
21 #include <linux/platform_device.h>
22 #include <linux/power_supply.h>
23 #include <linux/completion.h>
24 #include <linux/regulator/consumer.h>
25 #include <linux/err.h>
26 #include <linux/workqueue.h>
27 #include <linux/kobject.h>
28 #include <linux/of.h>
29 #include <linux/mfd/core.h>
30 #include <linux/mfd/abx500/ab8500.h>
31 #include <linux/mfd/abx500.h>
32 #include <linux/usb/otg.h>
33 #include <linux/mutex.h>
34 #include <linux/iio/consumer.h>
35
36 #include "ab8500-bm.h"
37 #include "ab8500-chargalg.h"
38
39 /* Charger constants */
40 #define NO_PW_CONN 0
41 #define AC_PW_CONN 1
42 #define USB_PW_CONN 2
43
44 #define MAIN_WDOG_ENA 0x01
45 #define MAIN_WDOG_KICK 0x02
46 #define MAIN_WDOG_DIS 0x00
47 #define CHARG_WD_KICK 0x01
48 #define MAIN_CH_ENA 0x01
49 #define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02
50 #define USB_CH_ENA 0x01
51 #define USB_CHG_NO_OVERSHOOT_ENA_N 0x02
52 #define MAIN_CH_DET 0x01
53 #define MAIN_CH_CV_ON 0x04
54 #define USB_CH_CV_ON 0x08
55 #define VBUS_DET_DBNC100 0x02
56 #define VBUS_DET_DBNC1 0x01
57 #define OTP_ENABLE_WD 0x01
58 #define DROP_COUNT_RESET 0x01
59 #define USB_CH_DET 0x01
60
61 #define MAIN_CH_INPUT_CURR_SHIFT 4
62 #define VBUS_IN_CURR_LIM_SHIFT 4
63 #define AUTO_VBUS_IN_CURR_LIM_SHIFT 4
64 #define VBUS_IN_CURR_LIM_RETRY_SET_TIME 30 /* seconds */
65
66 #define LED_INDICATOR_PWM_ENA 0x01
67 #define LED_INDICATOR_PWM_DIS 0x00
68 #define LED_IND_CUR_5MA 0x04
69 #define LED_INDICATOR_PWM_DUTY_252_256 0xBF
70
71 /* HW failure constants */
72 #define MAIN_CH_TH_PROT 0x02
73 #define VBUS_CH_NOK 0x08
74 #define USB_CH_TH_PROT 0x02
75 #define VBUS_OVV_TH 0x01
76 #define MAIN_CH_NOK 0x01
77 #define VBUS_DET 0x80
78
79 #define MAIN_CH_STATUS2_MAINCHGDROP 0x80
80 #define MAIN_CH_STATUS2_MAINCHARGERDETDBNC 0x40
81 #define USB_CH_VBUSDROP 0x40
82 #define USB_CH_VBUSDETDBNC 0x01
83
84 /* UsbLineStatus register bit masks */
85 #define AB8500_USB_LINK_STATUS 0x78
86 #define AB8505_USB_LINK_STATUS 0xF8
87 #define AB8500_STD_HOST_SUSP 0x18
88 #define USB_LINK_STATUS_SHIFT 3
89
90 /* Watchdog timeout constant */
91 #define WD_TIMER 0x30 /* 4min */
92 #define WD_KICK_INTERVAL (60 * HZ)
93
94 /* Lowest charger voltage is 3.39V -> 0x4E */
95 #define LOW_VOLT_REG 0x4E
96
97 /* Step up/down delay in us */
98 #define STEP_UDELAY 1000
99
100 #define CHARGER_STATUS_POLL 10 /* in ms */
101
102 #define CHG_WD_INTERVAL (60 * HZ)
103
104 #define AB8500_SW_CONTROL_FALLBACK 0x03
105 /* Wait for enumeration before charing in us */
106 #define WAIT_ACA_RID_ENUMERATION (5 * 1000)
107 /*External charger control*/
108 #define AB8500_SYS_CHARGER_CONTROL_REG 0x52
109 #define EXTERNAL_CHARGER_DISABLE_REG_VAL 0x03
110 #define EXTERNAL_CHARGER_ENABLE_REG_VAL 0x07
111
112 /* UsbLineStatus register - usb types */
113 enum ab8500_charger_link_status {
114 USB_STAT_NOT_CONFIGURED,
115 USB_STAT_STD_HOST_NC,
116 USB_STAT_STD_HOST_C_NS,
117 USB_STAT_STD_HOST_C_S,
118 USB_STAT_HOST_CHG_NM,
119 USB_STAT_HOST_CHG_HS,
120 USB_STAT_HOST_CHG_HS_CHIRP,
121 USB_STAT_DEDICATED_CHG,
122 USB_STAT_ACA_RID_A,
123 USB_STAT_ACA_RID_B,
124 USB_STAT_ACA_RID_C_NM,
125 USB_STAT_ACA_RID_C_HS,
126 USB_STAT_ACA_RID_C_HS_CHIRP,
127 USB_STAT_HM_IDGND,
128 USB_STAT_RESERVED,
129 USB_STAT_NOT_VALID_LINK,
130 USB_STAT_PHY_EN,
131 USB_STAT_SUP_NO_IDGND_VBUS,
132 USB_STAT_SUP_IDGND_VBUS,
133 USB_STAT_CHARGER_LINE_1,
134 USB_STAT_CARKIT_1,
135 USB_STAT_CARKIT_2,
136 USB_STAT_ACA_DOCK_CHARGER,
137 };
138
139 enum ab8500_usb_state {
140 AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */
141 AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */
142 AB8500_BM_USB_STATE_CONFIGURED,
143 AB8500_BM_USB_STATE_SUSPEND,
144 AB8500_BM_USB_STATE_RESUME,
145 AB8500_BM_USB_STATE_MAX,
146 };
147
148 /* VBUS input current limits supported in AB8500 in mA */
149 #define USB_CH_IP_CUR_LVL_0P05 50
150 #define USB_CH_IP_CUR_LVL_0P09 98
151 #define USB_CH_IP_CUR_LVL_0P19 193
152 #define USB_CH_IP_CUR_LVL_0P29 290
153 #define USB_CH_IP_CUR_LVL_0P38 380
154 #define USB_CH_IP_CUR_LVL_0P45 450
155 #define USB_CH_IP_CUR_LVL_0P5 500
156 #define USB_CH_IP_CUR_LVL_0P6 600
157 #define USB_CH_IP_CUR_LVL_0P7 700
158 #define USB_CH_IP_CUR_LVL_0P8 800
159 #define USB_CH_IP_CUR_LVL_0P9 900
160 #define USB_CH_IP_CUR_LVL_1P0 1000
161 #define USB_CH_IP_CUR_LVL_1P1 1100
162 #define USB_CH_IP_CUR_LVL_1P3 1300
163 #define USB_CH_IP_CUR_LVL_1P4 1400
164 #define USB_CH_IP_CUR_LVL_1P5 1500
165
166 #define VBAT_TRESH_IP_CUR_RED 3800
167
168 #define to_ab8500_charger_usb_device_info(x) container_of((x), \
169 struct ab8500_charger, usb_chg)
170 #define to_ab8500_charger_ac_device_info(x) container_of((x), \
171 struct ab8500_charger, ac_chg)
172
173 /**
174 * struct ab8500_charger_interrupts - ab8500 interupts
175 * @name: name of the interrupt
176 * @isr function pointer to the isr
177 */
178 struct ab8500_charger_interrupts {
179 char *name;
180 irqreturn_t (*isr)(int irq, void *data);
181 };
182
183 struct ab8500_charger_info {
184 int charger_connected;
185 int charger_online;
186 int charger_voltage;
187 int cv_active;
188 bool wd_expired;
189 int charger_current;
190 };
191
192 struct ab8500_charger_event_flags {
193 bool mainextchnotok;
194 bool main_thermal_prot;
195 bool usb_thermal_prot;
196 bool vbus_ovv;
197 bool usbchargernotok;
198 bool chgwdexp;
199 bool vbus_collapse;
200 bool vbus_drop_end;
201 };
202
203 struct ab8500_charger_usb_state {
204 int usb_current;
205 int usb_current_tmp;
206 enum ab8500_usb_state state;
207 enum ab8500_usb_state state_tmp;
208 spinlock_t usb_lock;
209 };
210
211 struct ab8500_charger_max_usb_in_curr {
212 int usb_type_max;
213 int set_max;
214 int calculated_max;
215 };
216
217 /**
218 * struct ab8500_charger - ab8500 Charger device information
219 * @dev: Pointer to the structure device
220 * @vbus_detected: VBUS detected
221 * @vbus_detected_start:
222 * VBUS detected during startup
223 * @ac_conn: This will be true when the AC charger has been plugged
224 * @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC
225 * charger is enabled
226 * @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB
227 * charger is enabled
228 * @vbat Battery voltage
229 * @old_vbat Previously measured battery voltage
230 * @usb_device_is_unrecognised USB device is unrecognised by the hardware
231 * @autopower Indicate if we should have automatic pwron after pwrloss
232 * @autopower_cfg platform specific power config support for "pwron after pwrloss"
233 * @invalid_charger_detect_state State when forcing AB to use invalid charger
234 * @is_aca_rid: Incicate if accessory is ACA type
235 * @current_stepping_sessions:
236 * Counter for current stepping sessions
237 * @parent: Pointer to the struct ab8500
238 * @adc_main_charger_v ADC channel for main charger voltage
239 * @adc_main_charger_c ADC channel for main charger current
240 * @adc_vbus_v ADC channel for USB charger voltage
241 * @adc_usb_charger_c ADC channel for USB charger current
242 * @bm: Platform specific battery management information
243 * @flags: Structure for information about events triggered
244 * @usb_state: Structure for usb stack information
245 * @max_usb_in_curr: Max USB charger input current
246 * @ac_chg: AC charger power supply
247 * @usb_chg: USB charger power supply
248 * @ac: Structure that holds the AC charger properties
249 * @usb: Structure that holds the USB charger properties
250 * @regu: Pointer to the struct regulator
251 * @charger_wq: Work queue for the IRQs and checking HW state
252 * @usb_ipt_crnt_lock: Lock to protect VBUS input current setting from mutuals
253 * @pm_lock: Lock to prevent system to suspend
254 * @check_vbat_work Work for checking vbat threshold to adjust vbus current
255 * @check_hw_failure_work: Work for checking HW state
256 * @check_usbchgnotok_work: Work for checking USB charger not ok status
257 * @kick_wd_work: Work for kicking the charger watchdog in case
258 * of ABB rev 1.* due to the watchog logic bug
259 * @ac_charger_attached_work: Work for checking if AC charger is still
260 * connected
261 * @usb_charger_attached_work: Work for checking if USB charger is still
262 * connected
263 * @ac_work: Work for checking AC charger connection
264 * @detect_usb_type_work: Work for detecting the USB type connected
265 * @usb_link_status_work: Work for checking the new USB link status
266 * @usb_state_changed_work: Work for checking USB state
267 * @attach_work: Work for detecting USB type
268 * @vbus_drop_end_work: Work for detecting VBUS drop end
269 * @check_main_thermal_prot_work:
270 * Work for checking Main thermal status
271 * @check_usb_thermal_prot_work:
272 * Work for checking USB thermal status
273 * @charger_attached_mutex: For controlling the wakelock
274 */
275 struct ab8500_charger {
276 struct device *dev;
277 bool vbus_detected;
278 bool vbus_detected_start;
279 bool ac_conn;
280 bool vddadc_en_ac;
281 bool vddadc_en_usb;
282 int vbat;
283 int old_vbat;
284 bool usb_device_is_unrecognised;
285 bool autopower;
286 bool autopower_cfg;
287 int invalid_charger_detect_state;
288 int is_aca_rid;
289 atomic_t current_stepping_sessions;
290 struct ab8500 *parent;
291 struct iio_channel *adc_main_charger_v;
292 struct iio_channel *adc_main_charger_c;
293 struct iio_channel *adc_vbus_v;
294 struct iio_channel *adc_usb_charger_c;
295 struct ab8500_bm_data *bm;
296 struct ab8500_charger_event_flags flags;
297 struct ab8500_charger_usb_state usb_state;
298 struct ab8500_charger_max_usb_in_curr max_usb_in_curr;
299 struct ux500_charger ac_chg;
300 struct ux500_charger usb_chg;
301 struct ab8500_charger_info ac;
302 struct ab8500_charger_info usb;
303 struct regulator *regu;
304 struct workqueue_struct *charger_wq;
305 struct mutex usb_ipt_crnt_lock;
306 struct delayed_work check_vbat_work;
307 struct delayed_work check_hw_failure_work;
308 struct delayed_work check_usbchgnotok_work;
309 struct delayed_work kick_wd_work;
310 struct delayed_work usb_state_changed_work;
311 struct delayed_work attach_work;
312 struct delayed_work ac_charger_attached_work;
313 struct delayed_work usb_charger_attached_work;
314 struct delayed_work vbus_drop_end_work;
315 struct work_struct ac_work;
316 struct work_struct detect_usb_type_work;
317 struct work_struct usb_link_status_work;
318 struct work_struct check_main_thermal_prot_work;
319 struct work_struct check_usb_thermal_prot_work;
320 struct usb_phy *usb_phy;
321 struct notifier_block nb;
322 struct mutex charger_attached_mutex;
323 };
324
325 /* AC properties */
326 static enum power_supply_property ab8500_charger_ac_props[] = {
327 POWER_SUPPLY_PROP_HEALTH,
328 POWER_SUPPLY_PROP_PRESENT,
329 POWER_SUPPLY_PROP_ONLINE,
330 POWER_SUPPLY_PROP_VOLTAGE_NOW,
331 POWER_SUPPLY_PROP_VOLTAGE_AVG,
332 POWER_SUPPLY_PROP_CURRENT_NOW,
333 };
334
335 /* USB properties */
336 static enum power_supply_property ab8500_charger_usb_props[] = {
337 POWER_SUPPLY_PROP_HEALTH,
338 POWER_SUPPLY_PROP_CURRENT_AVG,
339 POWER_SUPPLY_PROP_PRESENT,
340 POWER_SUPPLY_PROP_ONLINE,
341 POWER_SUPPLY_PROP_VOLTAGE_NOW,
342 POWER_SUPPLY_PROP_VOLTAGE_AVG,
343 POWER_SUPPLY_PROP_CURRENT_NOW,
344 };
345
346 /*
347 * Function for enabling and disabling sw fallback mode
348 * should always be disabled when no charger is connected.
349 */
ab8500_enable_disable_sw_fallback(struct ab8500_charger * di,bool fallback)350 static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di,
351 bool fallback)
352 {
353 u8 val;
354 u8 reg;
355 u8 bank;
356 u8 bit;
357 int ret;
358
359 dev_dbg(di->dev, "SW Fallback: %d\n", fallback);
360
361 if (is_ab8500(di->parent)) {
362 bank = 0x15;
363 reg = 0x0;
364 bit = 3;
365 } else {
366 bank = AB8500_SYS_CTRL1_BLOCK;
367 reg = AB8500_SW_CONTROL_FALLBACK;
368 bit = 0;
369 }
370
371 /* read the register containing fallback bit */
372 ret = abx500_get_register_interruptible(di->dev, bank, reg, &val);
373 if (ret < 0) {
374 dev_err(di->dev, "%d read failed\n", __LINE__);
375 return;
376 }
377
378 if (is_ab8500(di->parent)) {
379 /* enable the OPT emulation registers */
380 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
381 if (ret) {
382 dev_err(di->dev, "%d write failed\n", __LINE__);
383 goto disable_otp;
384 }
385 }
386
387 if (fallback)
388 val |= (1 << bit);
389 else
390 val &= ~(1 << bit);
391
392 /* write back the changed fallback bit value to register */
393 ret = abx500_set_register_interruptible(di->dev, bank, reg, val);
394 if (ret) {
395 dev_err(di->dev, "%d write failed\n", __LINE__);
396 }
397
398 disable_otp:
399 if (is_ab8500(di->parent)) {
400 /* disable the set OTP registers again */
401 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
402 if (ret) {
403 dev_err(di->dev, "%d write failed\n", __LINE__);
404 }
405 }
406 }
407
408 /**
409 * ab8500_power_supply_changed - a wrapper with local extensions for
410 * power_supply_changed
411 * @di: pointer to the ab8500_charger structure
412 * @psy: pointer to power_supply_that have changed.
413 *
414 */
ab8500_power_supply_changed(struct ab8500_charger * di,struct power_supply * psy)415 static void ab8500_power_supply_changed(struct ab8500_charger *di,
416 struct power_supply *psy)
417 {
418 /*
419 * This happens if we get notifications or interrupts and
420 * the platform has been configured not to support one or
421 * other type of charging.
422 */
423 if (!psy)
424 return;
425
426 if (di->autopower_cfg) {
427 if (!di->usb.charger_connected &&
428 !di->ac.charger_connected &&
429 di->autopower) {
430 di->autopower = false;
431 ab8500_enable_disable_sw_fallback(di, false);
432 } else if (!di->autopower &&
433 (di->ac.charger_connected ||
434 di->usb.charger_connected)) {
435 di->autopower = true;
436 ab8500_enable_disable_sw_fallback(di, true);
437 }
438 }
439 power_supply_changed(psy);
440 }
441
ab8500_charger_set_usb_connected(struct ab8500_charger * di,bool connected)442 static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
443 bool connected)
444 {
445 if (connected != di->usb.charger_connected) {
446 dev_dbg(di->dev, "USB connected:%i\n", connected);
447 di->usb.charger_connected = connected;
448
449 if (!connected)
450 di->flags.vbus_drop_end = false;
451
452 /*
453 * Sometimes the platform is configured not to support
454 * USB charging and no psy has been created, but we still
455 * will get these notifications.
456 */
457 if (di->usb_chg.psy) {
458 sysfs_notify(&di->usb_chg.psy->dev.kobj, NULL,
459 "present");
460 }
461
462 if (connected) {
463 mutex_lock(&di->charger_attached_mutex);
464 mutex_unlock(&di->charger_attached_mutex);
465
466 if (is_ab8500(di->parent))
467 queue_delayed_work(di->charger_wq,
468 &di->usb_charger_attached_work,
469 HZ);
470 } else {
471 cancel_delayed_work_sync(&di->usb_charger_attached_work);
472 mutex_lock(&di->charger_attached_mutex);
473 mutex_unlock(&di->charger_attached_mutex);
474 }
475 }
476 }
477
478 /**
479 * ab8500_charger_get_ac_voltage() - get ac charger voltage
480 * @di: pointer to the ab8500_charger structure
481 *
482 * Returns ac charger voltage (on success)
483 */
ab8500_charger_get_ac_voltage(struct ab8500_charger * di)484 static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
485 {
486 int vch, ret;
487
488 /* Only measure voltage if the charger is connected */
489 if (di->ac.charger_connected) {
490 ret = iio_read_channel_processed(di->adc_main_charger_v, &vch);
491 if (ret < 0)
492 dev_err(di->dev, "%s ADC conv failed,\n", __func__);
493 } else {
494 vch = 0;
495 }
496 return vch;
497 }
498
499 /**
500 * ab8500_charger_ac_cv() - check if the main charger is in CV mode
501 * @di: pointer to the ab8500_charger structure
502 *
503 * Returns ac charger CV mode (on success) else error code
504 */
ab8500_charger_ac_cv(struct ab8500_charger * di)505 static int ab8500_charger_ac_cv(struct ab8500_charger *di)
506 {
507 u8 val;
508 int ret = 0;
509
510 /* Only check CV mode if the charger is online */
511 if (di->ac.charger_online) {
512 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
513 AB8500_CH_STATUS1_REG, &val);
514 if (ret < 0) {
515 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
516 return 0;
517 }
518
519 if (val & MAIN_CH_CV_ON)
520 ret = 1;
521 else
522 ret = 0;
523 }
524
525 return ret;
526 }
527
528 /**
529 * ab8500_charger_get_vbus_voltage() - get vbus voltage
530 * @di: pointer to the ab8500_charger structure
531 *
532 * This function returns the vbus voltage.
533 * Returns vbus voltage (on success)
534 */
ab8500_charger_get_vbus_voltage(struct ab8500_charger * di)535 static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
536 {
537 int vch, ret;
538
539 /* Only measure voltage if the charger is connected */
540 if (di->usb.charger_connected) {
541 ret = iio_read_channel_processed(di->adc_vbus_v, &vch);
542 if (ret < 0)
543 dev_err(di->dev, "%s ADC conv failed,\n", __func__);
544 } else {
545 vch = 0;
546 }
547 return vch;
548 }
549
550 /**
551 * ab8500_charger_get_usb_current() - get usb charger current
552 * @di: pointer to the ab8500_charger structure
553 *
554 * This function returns the usb charger current.
555 * Returns usb current (on success) and error code on failure
556 */
ab8500_charger_get_usb_current(struct ab8500_charger * di)557 static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
558 {
559 int ich, ret;
560
561 /* Only measure current if the charger is online */
562 if (di->usb.charger_online) {
563 ret = iio_read_channel_processed(di->adc_usb_charger_c, &ich);
564 if (ret < 0)
565 dev_err(di->dev, "%s ADC conv failed,\n", __func__);
566 } else {
567 ich = 0;
568 }
569 return ich;
570 }
571
572 /**
573 * ab8500_charger_get_ac_current() - get ac charger current
574 * @di: pointer to the ab8500_charger structure
575 *
576 * This function returns the ac charger current.
577 * Returns ac current (on success) and error code on failure.
578 */
ab8500_charger_get_ac_current(struct ab8500_charger * di)579 static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
580 {
581 int ich, ret;
582
583 /* Only measure current if the charger is online */
584 if (di->ac.charger_online) {
585 ret = iio_read_channel_processed(di->adc_main_charger_c, &ich);
586 if (ret < 0)
587 dev_err(di->dev, "%s ADC conv failed,\n", __func__);
588 } else {
589 ich = 0;
590 }
591 return ich;
592 }
593
594 /**
595 * ab8500_charger_usb_cv() - check if the usb charger is in CV mode
596 * @di: pointer to the ab8500_charger structure
597 *
598 * Returns ac charger CV mode (on success) else error code
599 */
ab8500_charger_usb_cv(struct ab8500_charger * di)600 static int ab8500_charger_usb_cv(struct ab8500_charger *di)
601 {
602 int ret;
603 u8 val;
604
605 /* Only check CV mode if the charger is online */
606 if (di->usb.charger_online) {
607 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
608 AB8500_CH_USBCH_STAT1_REG, &val);
609 if (ret < 0) {
610 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
611 return 0;
612 }
613
614 if (val & USB_CH_CV_ON)
615 ret = 1;
616 else
617 ret = 0;
618 } else {
619 ret = 0;
620 }
621
622 return ret;
623 }
624
625 /**
626 * ab8500_charger_detect_chargers() - Detect the connected chargers
627 * @di: pointer to the ab8500_charger structure
628 * @probe: if probe, don't delay and wait for HW
629 *
630 * Returns the type of charger connected.
631 * For USB it will not mean we can actually charge from it
632 * but that there is a USB cable connected that we have to
633 * identify. This is used during startup when we don't get
634 * interrupts of the charger detection
635 *
636 * Returns an integer value, that means,
637 * NO_PW_CONN no power supply is connected
638 * AC_PW_CONN if the AC power supply is connected
639 * USB_PW_CONN if the USB power supply is connected
640 * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected
641 */
ab8500_charger_detect_chargers(struct ab8500_charger * di,bool probe)642 static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe)
643 {
644 int result = NO_PW_CONN;
645 int ret;
646 u8 val;
647
648 /* Check for AC charger */
649 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
650 AB8500_CH_STATUS1_REG, &val);
651 if (ret < 0) {
652 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
653 return ret;
654 }
655
656 if (val & MAIN_CH_DET)
657 result = AC_PW_CONN;
658
659 /* Check for USB charger */
660
661 if (!probe) {
662 /*
663 * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100
664 * when disconnecting ACA even though no
665 * charger was connected. Try waiting a little
666 * longer than the 100 ms of VBUS_DET_DBNC100...
667 */
668 msleep(110);
669 }
670 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
671 AB8500_CH_USBCH_STAT1_REG, &val);
672 if (ret < 0) {
673 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
674 return ret;
675 }
676 dev_dbg(di->dev,
677 "%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__,
678 val);
679 if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100))
680 result |= USB_PW_CONN;
681
682 return result;
683 }
684
685 /**
686 * ab8500_charger_max_usb_curr() - get the max curr for the USB type
687 * @di: pointer to the ab8500_charger structure
688 * @link_status: the identified USB type
689 *
690 * Get the maximum current that is allowed to be drawn from the host
691 * based on the USB type.
692 * Returns error code in case of failure else 0 on success
693 */
ab8500_charger_max_usb_curr(struct ab8500_charger * di,enum ab8500_charger_link_status link_status)694 static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
695 enum ab8500_charger_link_status link_status)
696 {
697 int ret = 0;
698
699 di->usb_device_is_unrecognised = false;
700
701 /*
702 * Platform only supports USB 2.0.
703 * This means that charging current from USB source
704 * is maximum 500 mA. Every occurrence of USB_STAT_*_HOST_*
705 * should set USB_CH_IP_CUR_LVL_0P5.
706 */
707
708 switch (link_status) {
709 case USB_STAT_STD_HOST_NC:
710 case USB_STAT_STD_HOST_C_NS:
711 case USB_STAT_STD_HOST_C_S:
712 dev_dbg(di->dev, "USB Type - Standard host is "
713 "detected through USB driver\n");
714 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
715 di->is_aca_rid = 0;
716 break;
717 case USB_STAT_HOST_CHG_HS_CHIRP:
718 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
719 di->is_aca_rid = 0;
720 break;
721 case USB_STAT_HOST_CHG_HS:
722 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
723 di->is_aca_rid = 0;
724 break;
725 case USB_STAT_ACA_RID_C_HS:
726 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P9;
727 di->is_aca_rid = 0;
728 break;
729 case USB_STAT_ACA_RID_A:
730 /*
731 * Dedicated charger level minus maximum current accessory
732 * can consume (900mA). Closest level is 500mA
733 */
734 dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n");
735 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
736 di->is_aca_rid = 1;
737 break;
738 case USB_STAT_ACA_RID_B:
739 /*
740 * Dedicated charger level minus 120mA (20mA for ACA and
741 * 100mA for potential accessory). Closest level is 1300mA
742 */
743 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P3;
744 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
745 di->max_usb_in_curr.usb_type_max);
746 di->is_aca_rid = 1;
747 break;
748 case USB_STAT_HOST_CHG_NM:
749 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
750 di->is_aca_rid = 0;
751 break;
752 case USB_STAT_DEDICATED_CHG:
753 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
754 di->is_aca_rid = 0;
755 break;
756 case USB_STAT_ACA_RID_C_HS_CHIRP:
757 case USB_STAT_ACA_RID_C_NM:
758 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
759 di->is_aca_rid = 1;
760 break;
761 case USB_STAT_NOT_CONFIGURED:
762 if (di->vbus_detected) {
763 di->usb_device_is_unrecognised = true;
764 dev_dbg(di->dev, "USB Type - Legacy charger.\n");
765 di->max_usb_in_curr.usb_type_max =
766 USB_CH_IP_CUR_LVL_1P5;
767 break;
768 }
769 fallthrough;
770 case USB_STAT_HM_IDGND:
771 dev_err(di->dev, "USB Type - Charging not allowed\n");
772 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
773 ret = -ENXIO;
774 break;
775 case USB_STAT_RESERVED:
776 if (is_ab8500(di->parent)) {
777 di->flags.vbus_collapse = true;
778 dev_err(di->dev, "USB Type - USB_STAT_RESERVED "
779 "VBUS has collapsed\n");
780 ret = -ENXIO;
781 break;
782 } else {
783 dev_dbg(di->dev, "USB Type - Charging not allowed\n");
784 di->max_usb_in_curr.usb_type_max =
785 USB_CH_IP_CUR_LVL_0P05;
786 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
787 link_status,
788 di->max_usb_in_curr.usb_type_max);
789 ret = -ENXIO;
790 break;
791 }
792 case USB_STAT_CARKIT_1:
793 case USB_STAT_CARKIT_2:
794 case USB_STAT_ACA_DOCK_CHARGER:
795 case USB_STAT_CHARGER_LINE_1:
796 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
797 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
798 di->max_usb_in_curr.usb_type_max);
799 break;
800 case USB_STAT_NOT_VALID_LINK:
801 dev_err(di->dev, "USB Type invalid - try charging anyway\n");
802 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
803 break;
804
805 default:
806 dev_err(di->dev, "USB Type - Unknown\n");
807 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
808 ret = -ENXIO;
809 break;
810 }
811
812 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
813 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
814 link_status, di->max_usb_in_curr.set_max);
815
816 return ret;
817 }
818
819 /**
820 * ab8500_charger_read_usb_type() - read the type of usb connected
821 * @di: pointer to the ab8500_charger structure
822 *
823 * Detect the type of the plugged USB
824 * Returns error code in case of failure else 0 on success
825 */
ab8500_charger_read_usb_type(struct ab8500_charger * di)826 static int ab8500_charger_read_usb_type(struct ab8500_charger *di)
827 {
828 int ret;
829 u8 val;
830
831 ret = abx500_get_register_interruptible(di->dev,
832 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val);
833 if (ret < 0) {
834 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
835 return ret;
836 }
837 if (is_ab8500(di->parent))
838 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
839 AB8500_USB_LINE_STAT_REG, &val);
840 else
841 ret = abx500_get_register_interruptible(di->dev,
842 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
843 if (ret < 0) {
844 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
845 return ret;
846 }
847
848 /* get the USB type */
849 if (is_ab8500(di->parent))
850 val = (val & AB8500_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
851 else
852 val = (val & AB8505_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
853 ret = ab8500_charger_max_usb_curr(di,
854 (enum ab8500_charger_link_status) val);
855
856 return ret;
857 }
858
859 /**
860 * ab8500_charger_detect_usb_type() - get the type of usb connected
861 * @di: pointer to the ab8500_charger structure
862 *
863 * Detect the type of the plugged USB
864 * Returns error code in case of failure else 0 on success
865 */
ab8500_charger_detect_usb_type(struct ab8500_charger * di)866 static int ab8500_charger_detect_usb_type(struct ab8500_charger *di)
867 {
868 int i, ret;
869 u8 val;
870
871 /*
872 * On getting the VBUS rising edge detect interrupt there
873 * is a 250ms delay after which the register UsbLineStatus
874 * is filled with valid data.
875 */
876 for (i = 0; i < 10; i++) {
877 msleep(250);
878 ret = abx500_get_register_interruptible(di->dev,
879 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG,
880 &val);
881 dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n",
882 __func__, val);
883 if (ret < 0) {
884 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
885 return ret;
886 }
887
888 if (is_ab8500(di->parent))
889 ret = abx500_get_register_interruptible(di->dev,
890 AB8500_USB, AB8500_USB_LINE_STAT_REG, &val);
891 else
892 ret = abx500_get_register_interruptible(di->dev,
893 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
894 if (ret < 0) {
895 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
896 return ret;
897 }
898 dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__,
899 val);
900 /*
901 * Until the IT source register is read the UsbLineStatus
902 * register is not updated, hence doing the same
903 * Revisit this:
904 */
905
906 /* get the USB type */
907 if (is_ab8500(di->parent))
908 val = (val & AB8500_USB_LINK_STATUS) >>
909 USB_LINK_STATUS_SHIFT;
910 else
911 val = (val & AB8505_USB_LINK_STATUS) >>
912 USB_LINK_STATUS_SHIFT;
913 if (val)
914 break;
915 }
916 ret = ab8500_charger_max_usb_curr(di,
917 (enum ab8500_charger_link_status) val);
918
919 return ret;
920 }
921
922 /*
923 * This array maps the raw hex value to charger voltage used by the AB8500
924 * Values taken from the UM0836
925 */
926 static int ab8500_charger_voltage_map[] = {
927 3500 ,
928 3525 ,
929 3550 ,
930 3575 ,
931 3600 ,
932 3625 ,
933 3650 ,
934 3675 ,
935 3700 ,
936 3725 ,
937 3750 ,
938 3775 ,
939 3800 ,
940 3825 ,
941 3850 ,
942 3875 ,
943 3900 ,
944 3925 ,
945 3950 ,
946 3975 ,
947 4000 ,
948 4025 ,
949 4050 ,
950 4060 ,
951 4070 ,
952 4080 ,
953 4090 ,
954 4100 ,
955 4110 ,
956 4120 ,
957 4130 ,
958 4140 ,
959 4150 ,
960 4160 ,
961 4170 ,
962 4180 ,
963 4190 ,
964 4200 ,
965 4210 ,
966 4220 ,
967 4230 ,
968 4240 ,
969 4250 ,
970 4260 ,
971 4270 ,
972 4280 ,
973 4290 ,
974 4300 ,
975 4310 ,
976 4320 ,
977 4330 ,
978 4340 ,
979 4350 ,
980 4360 ,
981 4370 ,
982 4380 ,
983 4390 ,
984 4400 ,
985 4410 ,
986 4420 ,
987 4430 ,
988 4440 ,
989 4450 ,
990 4460 ,
991 4470 ,
992 4480 ,
993 4490 ,
994 4500 ,
995 4510 ,
996 4520 ,
997 4530 ,
998 4540 ,
999 4550 ,
1000 4560 ,
1001 4570 ,
1002 4580 ,
1003 4590 ,
1004 4600 ,
1005 };
1006
ab8500_voltage_to_regval(int voltage)1007 static int ab8500_voltage_to_regval(int voltage)
1008 {
1009 int i;
1010
1011 /* Special case for voltage below 3.5V */
1012 if (voltage < ab8500_charger_voltage_map[0])
1013 return LOW_VOLT_REG;
1014
1015 for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) {
1016 if (voltage < ab8500_charger_voltage_map[i])
1017 return i - 1;
1018 }
1019
1020 /* If not last element, return error */
1021 i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1;
1022 if (voltage == ab8500_charger_voltage_map[i])
1023 return i;
1024 else
1025 return -1;
1026 }
1027
ab8500_current_to_regval(struct ab8500_charger * di,int curr)1028 static int ab8500_current_to_regval(struct ab8500_charger *di, int curr)
1029 {
1030 int i;
1031
1032 if (curr < di->bm->chg_output_curr[0])
1033 return 0;
1034
1035 for (i = 0; i < di->bm->n_chg_out_curr; i++) {
1036 if (curr < di->bm->chg_output_curr[i])
1037 return i - 1;
1038 }
1039
1040 /* If not last element, return error */
1041 i = di->bm->n_chg_out_curr - 1;
1042 if (curr == di->bm->chg_output_curr[i])
1043 return i;
1044 else
1045 return -1;
1046 }
1047
ab8500_vbus_in_curr_to_regval(struct ab8500_charger * di,int curr)1048 static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr)
1049 {
1050 int i;
1051
1052 if (curr < di->bm->chg_input_curr[0])
1053 return 0;
1054
1055 for (i = 0; i < di->bm->n_chg_in_curr; i++) {
1056 if (curr < di->bm->chg_input_curr[i])
1057 return i - 1;
1058 }
1059
1060 /* If not last element, return error */
1061 i = di->bm->n_chg_in_curr - 1;
1062 if (curr == di->bm->chg_input_curr[i])
1063 return i;
1064 else
1065 return -1;
1066 }
1067
1068 /**
1069 * ab8500_charger_get_usb_cur() - get usb current
1070 * @di: pointer to the ab8500_charger structre
1071 *
1072 * The usb stack provides the maximum current that can be drawn from
1073 * the standard usb host. This will be in mA.
1074 * This function converts current in mA to a value that can be written
1075 * to the register. Returns -1 if charging is not allowed
1076 */
ab8500_charger_get_usb_cur(struct ab8500_charger * di)1077 static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
1078 {
1079 int ret = 0;
1080 switch (di->usb_state.usb_current) {
1081 case 100:
1082 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P09;
1083 break;
1084 case 200:
1085 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P19;
1086 break;
1087 case 300:
1088 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P29;
1089 break;
1090 case 400:
1091 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P38;
1092 break;
1093 case 500:
1094 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
1095 break;
1096 default:
1097 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
1098 ret = -EPERM;
1099 break;
1100 }
1101 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
1102 return ret;
1103 }
1104
1105 /**
1106 * ab8500_charger_check_continue_stepping() - Check to allow stepping
1107 * @di: pointer to the ab8500_charger structure
1108 * @reg: select what charger register to check
1109 *
1110 * Check if current stepping should be allowed to continue.
1111 * Checks if charger source has not collapsed. If it has, further stepping
1112 * is not allowed.
1113 */
ab8500_charger_check_continue_stepping(struct ab8500_charger * di,int reg)1114 static bool ab8500_charger_check_continue_stepping(struct ab8500_charger *di,
1115 int reg)
1116 {
1117 if (reg == AB8500_USBCH_IPT_CRNTLVL_REG)
1118 return !di->flags.vbus_drop_end;
1119 else
1120 return true;
1121 }
1122
1123 /**
1124 * ab8500_charger_set_current() - set charger current
1125 * @di: pointer to the ab8500_charger structure
1126 * @ich: charger current, in mA
1127 * @reg: select what charger register to set
1128 *
1129 * Set charger current.
1130 * There is no state machine in the AB to step up/down the charger
1131 * current to avoid dips and spikes on MAIN, VBUS and VBAT when
1132 * charging is started. Instead we need to implement
1133 * this charger current step-up/down here.
1134 * Returns error code in case of failure else 0(on success)
1135 */
ab8500_charger_set_current(struct ab8500_charger * di,int ich,int reg)1136 static int ab8500_charger_set_current(struct ab8500_charger *di,
1137 int ich, int reg)
1138 {
1139 int ret = 0;
1140 int curr_index, prev_curr_index, shift_value, i;
1141 u8 reg_value;
1142 u32 step_udelay;
1143 bool no_stepping = false;
1144
1145 atomic_inc(&di->current_stepping_sessions);
1146
1147 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1148 reg, ®_value);
1149 if (ret < 0) {
1150 dev_err(di->dev, "%s read failed\n", __func__);
1151 goto exit_set_current;
1152 }
1153
1154 switch (reg) {
1155 case AB8500_MCH_IPT_CURLVL_REG:
1156 shift_value = MAIN_CH_INPUT_CURR_SHIFT;
1157 prev_curr_index = (reg_value >> shift_value);
1158 curr_index = ab8500_current_to_regval(di, ich);
1159 step_udelay = STEP_UDELAY;
1160 if (!di->ac.charger_connected)
1161 no_stepping = true;
1162 break;
1163 case AB8500_USBCH_IPT_CRNTLVL_REG:
1164 shift_value = VBUS_IN_CURR_LIM_SHIFT;
1165 prev_curr_index = (reg_value >> shift_value);
1166 curr_index = ab8500_vbus_in_curr_to_regval(di, ich);
1167 step_udelay = STEP_UDELAY * 100;
1168
1169 if (!di->usb.charger_connected)
1170 no_stepping = true;
1171 break;
1172 case AB8500_CH_OPT_CRNTLVL_REG:
1173 shift_value = 0;
1174 prev_curr_index = (reg_value >> shift_value);
1175 curr_index = ab8500_current_to_regval(di, ich);
1176 step_udelay = STEP_UDELAY;
1177 if (curr_index && (curr_index - prev_curr_index) > 1)
1178 step_udelay *= 100;
1179
1180 if (!di->usb.charger_connected && !di->ac.charger_connected)
1181 no_stepping = true;
1182
1183 break;
1184 default:
1185 dev_err(di->dev, "%s current register not valid\n", __func__);
1186 ret = -ENXIO;
1187 goto exit_set_current;
1188 }
1189
1190 if (curr_index < 0) {
1191 dev_err(di->dev, "requested current limit out-of-range\n");
1192 ret = -ENXIO;
1193 goto exit_set_current;
1194 }
1195
1196 /* only update current if it's been changed */
1197 if (prev_curr_index == curr_index) {
1198 dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n",
1199 __func__, reg);
1200 ret = 0;
1201 goto exit_set_current;
1202 }
1203
1204 dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n",
1205 __func__, ich, reg);
1206
1207 if (no_stepping) {
1208 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1209 reg, (u8)curr_index << shift_value);
1210 if (ret)
1211 dev_err(di->dev, "%s write failed\n", __func__);
1212 } else if (prev_curr_index > curr_index) {
1213 for (i = prev_curr_index - 1; i >= curr_index; i--) {
1214 dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n",
1215 (u8) i << shift_value, reg);
1216 ret = abx500_set_register_interruptible(di->dev,
1217 AB8500_CHARGER, reg, (u8)i << shift_value);
1218 if (ret) {
1219 dev_err(di->dev, "%s write failed\n", __func__);
1220 goto exit_set_current;
1221 }
1222 if (i != curr_index)
1223 usleep_range(step_udelay, step_udelay * 2);
1224 }
1225 } else {
1226 bool allow = true;
1227 for (i = prev_curr_index + 1; i <= curr_index && allow; i++) {
1228 dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n",
1229 (u8)i << shift_value, reg);
1230 ret = abx500_set_register_interruptible(di->dev,
1231 AB8500_CHARGER, reg, (u8)i << shift_value);
1232 if (ret) {
1233 dev_err(di->dev, "%s write failed\n", __func__);
1234 goto exit_set_current;
1235 }
1236 if (i != curr_index)
1237 usleep_range(step_udelay, step_udelay * 2);
1238
1239 allow = ab8500_charger_check_continue_stepping(di, reg);
1240 }
1241 }
1242
1243 exit_set_current:
1244 atomic_dec(&di->current_stepping_sessions);
1245
1246 return ret;
1247 }
1248
1249 /**
1250 * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
1251 * @di: pointer to the ab8500_charger structure
1252 * @ich_in: charger input current limit
1253 *
1254 * Sets the current that can be drawn from the USB host
1255 * Returns error code in case of failure else 0(on success)
1256 */
ab8500_charger_set_vbus_in_curr(struct ab8500_charger * di,int ich_in)1257 static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
1258 int ich_in)
1259 {
1260 int min_value;
1261 int ret;
1262
1263 /* We should always use to lowest current limit */
1264 min_value = min(di->bm->chg_params->usb_curr_max, ich_in);
1265 if (di->max_usb_in_curr.set_max > 0)
1266 min_value = min(di->max_usb_in_curr.set_max, min_value);
1267
1268 if (di->usb_state.usb_current >= 0)
1269 min_value = min(di->usb_state.usb_current, min_value);
1270
1271 switch (min_value) {
1272 case 100:
1273 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1274 min_value = USB_CH_IP_CUR_LVL_0P05;
1275 break;
1276 case 500:
1277 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1278 min_value = USB_CH_IP_CUR_LVL_0P45;
1279 break;
1280 default:
1281 break;
1282 }
1283
1284 dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value);
1285
1286 mutex_lock(&di->usb_ipt_crnt_lock);
1287 ret = ab8500_charger_set_current(di, min_value,
1288 AB8500_USBCH_IPT_CRNTLVL_REG);
1289 mutex_unlock(&di->usb_ipt_crnt_lock);
1290
1291 return ret;
1292 }
1293
1294 /**
1295 * ab8500_charger_set_main_in_curr() - set main charger input current
1296 * @di: pointer to the ab8500_charger structure
1297 * @ich_in: input charger current, in mA
1298 *
1299 * Set main charger input current.
1300 * Returns error code in case of failure else 0(on success)
1301 */
ab8500_charger_set_main_in_curr(struct ab8500_charger * di,int ich_in)1302 static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di,
1303 int ich_in)
1304 {
1305 return ab8500_charger_set_current(di, ich_in,
1306 AB8500_MCH_IPT_CURLVL_REG);
1307 }
1308
1309 /**
1310 * ab8500_charger_set_output_curr() - set charger output current
1311 * @di: pointer to the ab8500_charger structure
1312 * @ich_out: output charger current, in mA
1313 *
1314 * Set charger output current.
1315 * Returns error code in case of failure else 0(on success)
1316 */
ab8500_charger_set_output_curr(struct ab8500_charger * di,int ich_out)1317 static int ab8500_charger_set_output_curr(struct ab8500_charger *di,
1318 int ich_out)
1319 {
1320 return ab8500_charger_set_current(di, ich_out,
1321 AB8500_CH_OPT_CRNTLVL_REG);
1322 }
1323
1324 /**
1325 * ab8500_charger_led_en() - turn on/off chargign led
1326 * @di: pointer to the ab8500_charger structure
1327 * @on: flag to turn on/off the chargign led
1328 *
1329 * Power ON/OFF charging LED indication
1330 * Returns error code in case of failure else 0(on success)
1331 */
ab8500_charger_led_en(struct ab8500_charger * di,int on)1332 static int ab8500_charger_led_en(struct ab8500_charger *di, int on)
1333 {
1334 int ret;
1335
1336 if (on) {
1337 /* Power ON charging LED indicator, set LED current to 5mA */
1338 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1339 AB8500_LED_INDICATOR_PWM_CTRL,
1340 (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA));
1341 if (ret) {
1342 dev_err(di->dev, "Power ON LED failed\n");
1343 return ret;
1344 }
1345 /* LED indicator PWM duty cycle 252/256 */
1346 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1347 AB8500_LED_INDICATOR_PWM_DUTY,
1348 LED_INDICATOR_PWM_DUTY_252_256);
1349 if (ret) {
1350 dev_err(di->dev, "Set LED PWM duty cycle failed\n");
1351 return ret;
1352 }
1353 } else {
1354 /* Power off charging LED indicator */
1355 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1356 AB8500_LED_INDICATOR_PWM_CTRL,
1357 LED_INDICATOR_PWM_DIS);
1358 if (ret) {
1359 dev_err(di->dev, "Power-off LED failed\n");
1360 return ret;
1361 }
1362 }
1363
1364 return ret;
1365 }
1366
1367 /**
1368 * ab8500_charger_ac_en() - enable or disable ac charging
1369 * @di: pointer to the ab8500_charger structure
1370 * @enable: enable/disable flag
1371 * @vset: charging voltage
1372 * @iset: charging current
1373 *
1374 * Enable/Disable AC/Mains charging and turns on/off the charging led
1375 * respectively.
1376 **/
ab8500_charger_ac_en(struct ux500_charger * charger,int enable,int vset,int iset)1377 static int ab8500_charger_ac_en(struct ux500_charger *charger,
1378 int enable, int vset, int iset)
1379 {
1380 int ret;
1381 int volt_index;
1382 int curr_index;
1383 int input_curr_index;
1384 u8 overshoot = 0;
1385
1386 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1387
1388 if (enable) {
1389 /* Check if AC is connected */
1390 if (!di->ac.charger_connected) {
1391 dev_err(di->dev, "AC charger not connected\n");
1392 return -ENXIO;
1393 }
1394
1395 /* Enable AC charging */
1396 dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset);
1397
1398 /*
1399 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1400 * will be triggered every time we enable the VDD ADC supply.
1401 * This will turn off charging for a short while.
1402 * It can be avoided by having the supply on when
1403 * there is a charger enabled. Normally the VDD ADC supply
1404 * is enabled every time a GPADC conversion is triggered.
1405 * We will force it to be enabled from this driver to have
1406 * the GPADC module independent of the AB8500 chargers
1407 */
1408 if (!di->vddadc_en_ac) {
1409 ret = regulator_enable(di->regu);
1410 if (ret)
1411 dev_warn(di->dev,
1412 "Failed to enable regulator\n");
1413 else
1414 di->vddadc_en_ac = true;
1415 }
1416
1417 /* Check if the requested voltage or current is valid */
1418 volt_index = ab8500_voltage_to_regval(vset);
1419 curr_index = ab8500_current_to_regval(di, iset);
1420 input_curr_index = ab8500_current_to_regval(di,
1421 di->bm->chg_params->ac_curr_max);
1422 if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
1423 dev_err(di->dev,
1424 "Charger voltage or current too high, "
1425 "charging not started\n");
1426 return -ENXIO;
1427 }
1428
1429 /* ChVoltLevel: maximum battery charging voltage */
1430 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1431 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1432 if (ret) {
1433 dev_err(di->dev, "%s write failed\n", __func__);
1434 return ret;
1435 }
1436 /* MainChInputCurr: current that can be drawn from the charger*/
1437 ret = ab8500_charger_set_main_in_curr(di,
1438 di->bm->chg_params->ac_curr_max);
1439 if (ret) {
1440 dev_err(di->dev, "%s Failed to set MainChInputCurr\n",
1441 __func__);
1442 return ret;
1443 }
1444 /* ChOutputCurentLevel: protected output current */
1445 ret = ab8500_charger_set_output_curr(di, iset);
1446 if (ret) {
1447 dev_err(di->dev, "%s "
1448 "Failed to set ChOutputCurentLevel\n",
1449 __func__);
1450 return ret;
1451 }
1452
1453 /* Check if VBAT overshoot control should be enabled */
1454 if (!di->bm->enable_overshoot)
1455 overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;
1456
1457 /* Enable Main Charger */
1458 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1459 AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot);
1460 if (ret) {
1461 dev_err(di->dev, "%s write failed\n", __func__);
1462 return ret;
1463 }
1464
1465 /* Power on charging LED indication */
1466 ret = ab8500_charger_led_en(di, true);
1467 if (ret < 0)
1468 dev_err(di->dev, "failed to enable LED\n");
1469
1470 di->ac.charger_online = 1;
1471 } else {
1472 /* Disable AC charging */
1473 if (is_ab8500_1p1_or_earlier(di->parent)) {
1474 /*
1475 * For ABB revision 1.0 and 1.1 there is a bug in the
1476 * watchdog logic. That means we have to continuously
1477 * kick the charger watchdog even when no charger is
1478 * connected. This is only valid once the AC charger
1479 * has been enabled. This is a bug that is not handled
1480 * by the algorithm and the watchdog have to be kicked
1481 * by the charger driver when the AC charger
1482 * is disabled
1483 */
1484 if (di->ac_conn) {
1485 queue_delayed_work(di->charger_wq,
1486 &di->kick_wd_work,
1487 round_jiffies(WD_KICK_INTERVAL));
1488 }
1489
1490 /*
1491 * We can't turn off charging completely
1492 * due to a bug in AB8500 cut1.
1493 * If we do, charging will not start again.
1494 * That is why we set the lowest voltage
1495 * and current possible
1496 */
1497 ret = abx500_set_register_interruptible(di->dev,
1498 AB8500_CHARGER,
1499 AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5);
1500 if (ret) {
1501 dev_err(di->dev,
1502 "%s write failed\n", __func__);
1503 return ret;
1504 }
1505
1506 ret = ab8500_charger_set_output_curr(di, 0);
1507 if (ret) {
1508 dev_err(di->dev, "%s "
1509 "Failed to set ChOutputCurentLevel\n",
1510 __func__);
1511 return ret;
1512 }
1513 } else {
1514 ret = abx500_set_register_interruptible(di->dev,
1515 AB8500_CHARGER,
1516 AB8500_MCH_CTRL1, 0);
1517 if (ret) {
1518 dev_err(di->dev,
1519 "%s write failed\n", __func__);
1520 return ret;
1521 }
1522 }
1523
1524 ret = ab8500_charger_led_en(di, false);
1525 if (ret < 0)
1526 dev_err(di->dev, "failed to disable LED\n");
1527
1528 di->ac.charger_online = 0;
1529 di->ac.wd_expired = false;
1530
1531 /* Disable regulator if enabled */
1532 if (di->vddadc_en_ac) {
1533 regulator_disable(di->regu);
1534 di->vddadc_en_ac = false;
1535 }
1536
1537 dev_dbg(di->dev, "%s Disabled AC charging\n", __func__);
1538 }
1539 ab8500_power_supply_changed(di, di->ac_chg.psy);
1540
1541 return ret;
1542 }
1543
1544 /**
1545 * ab8500_charger_usb_en() - enable usb charging
1546 * @di: pointer to the ab8500_charger structure
1547 * @enable: enable/disable flag
1548 * @vset: charging voltage
1549 * @ich_out: charger output current
1550 *
1551 * Enable/Disable USB charging and turns on/off the charging led respectively.
1552 * Returns error code in case of failure else 0(on success)
1553 */
ab8500_charger_usb_en(struct ux500_charger * charger,int enable,int vset,int ich_out)1554 static int ab8500_charger_usb_en(struct ux500_charger *charger,
1555 int enable, int vset, int ich_out)
1556 {
1557 int ret;
1558 int volt_index;
1559 int curr_index;
1560 u8 overshoot = 0;
1561
1562 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1563
1564 if (enable) {
1565 /* Check if USB is connected */
1566 if (!di->usb.charger_connected) {
1567 dev_err(di->dev, "USB charger not connected\n");
1568 return -ENXIO;
1569 }
1570
1571 /*
1572 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1573 * will be triggered every time we enable the VDD ADC supply.
1574 * This will turn off charging for a short while.
1575 * It can be avoided by having the supply on when
1576 * there is a charger enabled. Normally the VDD ADC supply
1577 * is enabled every time a GPADC conversion is triggered.
1578 * We will force it to be enabled from this driver to have
1579 * the GPADC module independent of the AB8500 chargers
1580 */
1581 if (!di->vddadc_en_usb) {
1582 ret = regulator_enable(di->regu);
1583 if (ret)
1584 dev_warn(di->dev,
1585 "Failed to enable regulator\n");
1586 else
1587 di->vddadc_en_usb = true;
1588 }
1589
1590 /* Enable USB charging */
1591 dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out);
1592
1593 /* Check if the requested voltage or current is valid */
1594 volt_index = ab8500_voltage_to_regval(vset);
1595 curr_index = ab8500_current_to_regval(di, ich_out);
1596 if (volt_index < 0 || curr_index < 0) {
1597 dev_err(di->dev,
1598 "Charger voltage or current too high, "
1599 "charging not started\n");
1600 return -ENXIO;
1601 }
1602
1603 /*
1604 * ChVoltLevel: max voltage up to which battery can be
1605 * charged
1606 */
1607 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1608 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1609 if (ret) {
1610 dev_err(di->dev, "%s write failed\n", __func__);
1611 return ret;
1612 }
1613 /* Check if VBAT overshoot control should be enabled */
1614 if (!di->bm->enable_overshoot)
1615 overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;
1616
1617 /* Enable USB Charger */
1618 dev_dbg(di->dev,
1619 "Enabling USB with write to AB8500_USBCH_CTRL1_REG\n");
1620 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1621 AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot);
1622 if (ret) {
1623 dev_err(di->dev, "%s write failed\n", __func__);
1624 return ret;
1625 }
1626
1627 /* If success power on charging LED indication */
1628 ret = ab8500_charger_led_en(di, true);
1629 if (ret < 0)
1630 dev_err(di->dev, "failed to enable LED\n");
1631
1632 di->usb.charger_online = 1;
1633
1634 /* USBChInputCurr: current that can be drawn from the usb */
1635 ret = ab8500_charger_set_vbus_in_curr(di,
1636 di->max_usb_in_curr.usb_type_max);
1637 if (ret) {
1638 dev_err(di->dev, "setting USBChInputCurr failed\n");
1639 return ret;
1640 }
1641
1642 /* ChOutputCurentLevel: protected output current */
1643 ret = ab8500_charger_set_output_curr(di, ich_out);
1644 if (ret) {
1645 dev_err(di->dev, "%s "
1646 "Failed to set ChOutputCurentLevel\n",
1647 __func__);
1648 return ret;
1649 }
1650
1651 queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);
1652
1653 } else {
1654 /* Disable USB charging */
1655 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1656 ret = abx500_set_register_interruptible(di->dev,
1657 AB8500_CHARGER,
1658 AB8500_USBCH_CTRL1_REG, 0);
1659 if (ret) {
1660 dev_err(di->dev,
1661 "%s write failed\n", __func__);
1662 return ret;
1663 }
1664
1665 ret = ab8500_charger_led_en(di, false);
1666 if (ret < 0)
1667 dev_err(di->dev, "failed to disable LED\n");
1668 /* USBChInputCurr: current that can be drawn from the usb */
1669 ret = ab8500_charger_set_vbus_in_curr(di, 0);
1670 if (ret) {
1671 dev_err(di->dev, "setting USBChInputCurr failed\n");
1672 return ret;
1673 }
1674
1675 /* ChOutputCurentLevel: protected output current */
1676 ret = ab8500_charger_set_output_curr(di, 0);
1677 if (ret) {
1678 dev_err(di->dev, "%s "
1679 "Failed to reset ChOutputCurentLevel\n",
1680 __func__);
1681 return ret;
1682 }
1683 di->usb.charger_online = 0;
1684 di->usb.wd_expired = false;
1685
1686 /* Disable regulator if enabled */
1687 if (di->vddadc_en_usb) {
1688 regulator_disable(di->regu);
1689 di->vddadc_en_usb = false;
1690 }
1691
1692 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1693
1694 /* Cancel any pending Vbat check work */
1695 cancel_delayed_work(&di->check_vbat_work);
1696
1697 }
1698 ab8500_power_supply_changed(di, di->usb_chg.psy);
1699
1700 return ret;
1701 }
1702
ab8500_external_charger_prepare(struct notifier_block * charger_nb,unsigned long event,void * data)1703 static int ab8500_external_charger_prepare(struct notifier_block *charger_nb,
1704 unsigned long event, void *data)
1705 {
1706 int ret;
1707 struct device *dev = data;
1708 /*Toggle External charger control pin*/
1709 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1710 AB8500_SYS_CHARGER_CONTROL_REG,
1711 EXTERNAL_CHARGER_DISABLE_REG_VAL);
1712 if (ret < 0) {
1713 dev_err(dev, "write reg failed %d\n", ret);
1714 goto out;
1715 }
1716 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1717 AB8500_SYS_CHARGER_CONTROL_REG,
1718 EXTERNAL_CHARGER_ENABLE_REG_VAL);
1719 if (ret < 0)
1720 dev_err(dev, "Write reg failed %d\n", ret);
1721
1722 out:
1723 return ret;
1724 }
1725
1726 /**
1727 * ab8500_charger_usb_check_enable() - enable usb charging
1728 * @charger: pointer to the ux500_charger structure
1729 * @vset: charging voltage
1730 * @iset: charger output current
1731 *
1732 * Check if the VBUS charger has been disconnected and reconnected without
1733 * AB8500 rising an interrupt. Returns 0 on success.
1734 */
ab8500_charger_usb_check_enable(struct ux500_charger * charger,int vset,int iset)1735 static int ab8500_charger_usb_check_enable(struct ux500_charger *charger,
1736 int vset, int iset)
1737 {
1738 u8 usbch_ctrl1 = 0;
1739 int ret = 0;
1740
1741 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1742
1743 if (!di->usb.charger_connected)
1744 return ret;
1745
1746 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1747 AB8500_USBCH_CTRL1_REG, &usbch_ctrl1);
1748 if (ret < 0) {
1749 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1750 return ret;
1751 }
1752 dev_dbg(di->dev, "USB charger ctrl: 0x%02x\n", usbch_ctrl1);
1753
1754 if (!(usbch_ctrl1 & USB_CH_ENA)) {
1755 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1756
1757 ret = abx500_mask_and_set_register_interruptible(di->dev,
1758 AB8500_CHARGER, AB8500_CHARGER_CTRL,
1759 DROP_COUNT_RESET, DROP_COUNT_RESET);
1760 if (ret < 0) {
1761 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1762 return ret;
1763 }
1764
1765 ret = ab8500_charger_usb_en(&di->usb_chg, true, vset, iset);
1766 if (ret < 0) {
1767 dev_err(di->dev, "Failed to enable VBUS charger %d\n",
1768 __LINE__);
1769 return ret;
1770 }
1771 }
1772 return ret;
1773 }
1774
1775 /**
1776 * ab8500_charger_ac_check_enable() - enable usb charging
1777 * @charger: pointer to the ux500_charger structure
1778 * @vset: charging voltage
1779 * @iset: charger output current
1780 *
1781 * Check if the AC charger has been disconnected and reconnected without
1782 * AB8500 rising an interrupt. Returns 0 on success.
1783 */
ab8500_charger_ac_check_enable(struct ux500_charger * charger,int vset,int iset)1784 static int ab8500_charger_ac_check_enable(struct ux500_charger *charger,
1785 int vset, int iset)
1786 {
1787 u8 mainch_ctrl1 = 0;
1788 int ret = 0;
1789
1790 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1791
1792 if (!di->ac.charger_connected)
1793 return ret;
1794
1795 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1796 AB8500_MCH_CTRL1, &mainch_ctrl1);
1797 if (ret < 0) {
1798 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1799 return ret;
1800 }
1801 dev_dbg(di->dev, "AC charger ctrl: 0x%02x\n", mainch_ctrl1);
1802
1803 if (!(mainch_ctrl1 & MAIN_CH_ENA)) {
1804 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1805
1806 ret = abx500_mask_and_set_register_interruptible(di->dev,
1807 AB8500_CHARGER, AB8500_CHARGER_CTRL,
1808 DROP_COUNT_RESET, DROP_COUNT_RESET);
1809
1810 if (ret < 0) {
1811 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1812 return ret;
1813 }
1814
1815 ret = ab8500_charger_ac_en(&di->usb_chg, true, vset, iset);
1816 if (ret < 0) {
1817 dev_err(di->dev, "failed to enable AC charger %d\n",
1818 __LINE__);
1819 return ret;
1820 }
1821 }
1822 return ret;
1823 }
1824
1825 /**
1826 * ab8500_charger_watchdog_kick() - kick charger watchdog
1827 * @di: pointer to the ab8500_charger structure
1828 *
1829 * Kick charger watchdog
1830 * Returns error code in case of failure else 0(on success)
1831 */
ab8500_charger_watchdog_kick(struct ux500_charger * charger)1832 static int ab8500_charger_watchdog_kick(struct ux500_charger *charger)
1833 {
1834 int ret;
1835 struct ab8500_charger *di;
1836
1837 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
1838 di = to_ab8500_charger_ac_device_info(charger);
1839 else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1840 di = to_ab8500_charger_usb_device_info(charger);
1841 else
1842 return -ENXIO;
1843
1844 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1845 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
1846 if (ret)
1847 dev_err(di->dev, "Failed to kick WD!\n");
1848
1849 return ret;
1850 }
1851
1852 /**
1853 * ab8500_charger_update_charger_current() - update charger current
1854 * @di: pointer to the ab8500_charger structure
1855 *
1856 * Update the charger output current for the specified charger
1857 * Returns error code in case of failure else 0(on success)
1858 */
ab8500_charger_update_charger_current(struct ux500_charger * charger,int ich_out)1859 static int ab8500_charger_update_charger_current(struct ux500_charger *charger,
1860 int ich_out)
1861 {
1862 int ret;
1863 struct ab8500_charger *di;
1864
1865 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
1866 di = to_ab8500_charger_ac_device_info(charger);
1867 else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1868 di = to_ab8500_charger_usb_device_info(charger);
1869 else
1870 return -ENXIO;
1871
1872 ret = ab8500_charger_set_output_curr(di, ich_out);
1873 if (ret) {
1874 dev_err(di->dev, "%s "
1875 "Failed to set ChOutputCurentLevel\n",
1876 __func__);
1877 return ret;
1878 }
1879
1880 /* Reset the main and usb drop input current measurement counter */
1881 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1882 AB8500_CHARGER_CTRL, DROP_COUNT_RESET);
1883 if (ret) {
1884 dev_err(di->dev, "%s write failed\n", __func__);
1885 return ret;
1886 }
1887
1888 return ret;
1889 }
1890
ab8500_charger_get_ext_psy_data(struct device * dev,void * data)1891 static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
1892 {
1893 struct power_supply *psy;
1894 struct power_supply *ext = dev_get_drvdata(dev);
1895 const char **supplicants = (const char **)ext->supplied_to;
1896 struct ab8500_charger *di;
1897 union power_supply_propval ret;
1898 int j;
1899 struct ux500_charger *usb_chg;
1900
1901 usb_chg = (struct ux500_charger *)data;
1902 psy = usb_chg->psy;
1903
1904 di = to_ab8500_charger_usb_device_info(usb_chg);
1905
1906 /* For all psy where the driver name appears in any supplied_to */
1907 j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
1908 if (j < 0)
1909 return 0;
1910
1911 /* Go through all properties for the psy */
1912 for (j = 0; j < ext->desc->num_properties; j++) {
1913 enum power_supply_property prop;
1914 prop = ext->desc->properties[j];
1915
1916 if (power_supply_get_property(ext, prop, &ret))
1917 continue;
1918
1919 switch (prop) {
1920 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1921 switch (ext->desc->type) {
1922 case POWER_SUPPLY_TYPE_BATTERY:
1923 di->vbat = ret.intval / 1000;
1924 break;
1925 default:
1926 break;
1927 }
1928 break;
1929 default:
1930 break;
1931 }
1932 }
1933 return 0;
1934 }
1935
1936 /**
1937 * ab8500_charger_check_vbat_work() - keep vbus current within spec
1938 * @work pointer to the work_struct structure
1939 *
1940 * Due to a asic bug it is necessary to lower the input current to the vbus
1941 * charger when charging with at some specific levels. This issue is only valid
1942 * for below a certain battery voltage. This function makes sure that the
1943 * the allowed current limit isn't exceeded.
1944 */
ab8500_charger_check_vbat_work(struct work_struct * work)1945 static void ab8500_charger_check_vbat_work(struct work_struct *work)
1946 {
1947 int t = 10;
1948 struct ab8500_charger *di = container_of(work,
1949 struct ab8500_charger, check_vbat_work.work);
1950
1951 class_for_each_device(power_supply_class, NULL,
1952 di->usb_chg.psy, ab8500_charger_get_ext_psy_data);
1953
1954 /* First run old_vbat is 0. */
1955 if (di->old_vbat == 0)
1956 di->old_vbat = di->vbat;
1957
1958 if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED &&
1959 di->vbat <= VBAT_TRESH_IP_CUR_RED) ||
1960 (di->old_vbat > VBAT_TRESH_IP_CUR_RED &&
1961 di->vbat > VBAT_TRESH_IP_CUR_RED))) {
1962
1963 dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d,"
1964 " old: %d\n", di->max_usb_in_curr.usb_type_max,
1965 di->vbat, di->old_vbat);
1966 ab8500_charger_set_vbus_in_curr(di,
1967 di->max_usb_in_curr.usb_type_max);
1968 power_supply_changed(di->usb_chg.psy);
1969 }
1970
1971 di->old_vbat = di->vbat;
1972
1973 /*
1974 * No need to check the battery voltage every second when not close to
1975 * the threshold.
1976 */
1977 if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) &&
1978 (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100)))
1979 t = 1;
1980
1981 queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ);
1982 }
1983
1984 /**
1985 * ab8500_charger_check_hw_failure_work() - check main charger failure
1986 * @work: pointer to the work_struct structure
1987 *
1988 * Work queue function for checking the main charger status
1989 */
ab8500_charger_check_hw_failure_work(struct work_struct * work)1990 static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
1991 {
1992 int ret;
1993 u8 reg_value;
1994
1995 struct ab8500_charger *di = container_of(work,
1996 struct ab8500_charger, check_hw_failure_work.work);
1997
1998 /* Check if the status bits for HW failure is still active */
1999 if (di->flags.mainextchnotok) {
2000 ret = abx500_get_register_interruptible(di->dev,
2001 AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value);
2002 if (ret < 0) {
2003 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2004 return;
2005 }
2006 if (!(reg_value & MAIN_CH_NOK)) {
2007 di->flags.mainextchnotok = false;
2008 ab8500_power_supply_changed(di, di->ac_chg.psy);
2009 }
2010 }
2011 if (di->flags.vbus_ovv) {
2012 ret = abx500_get_register_interruptible(di->dev,
2013 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG,
2014 ®_value);
2015 if (ret < 0) {
2016 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2017 return;
2018 }
2019 if (!(reg_value & VBUS_OVV_TH)) {
2020 di->flags.vbus_ovv = false;
2021 ab8500_power_supply_changed(di, di->usb_chg.psy);
2022 }
2023 }
2024 /* If we still have a failure, schedule a new check */
2025 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
2026 queue_delayed_work(di->charger_wq,
2027 &di->check_hw_failure_work, round_jiffies(HZ));
2028 }
2029 }
2030
2031 /**
2032 * ab8500_charger_kick_watchdog_work() - kick the watchdog
2033 * @work: pointer to the work_struct structure
2034 *
2035 * Work queue function for kicking the charger watchdog.
2036 *
2037 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
2038 * logic. That means we have to continuously kick the charger
2039 * watchdog even when no charger is connected. This is only
2040 * valid once the AC charger has been enabled. This is
2041 * a bug that is not handled by the algorithm and the
2042 * watchdog have to be kicked by the charger driver
2043 * when the AC charger is disabled
2044 */
ab8500_charger_kick_watchdog_work(struct work_struct * work)2045 static void ab8500_charger_kick_watchdog_work(struct work_struct *work)
2046 {
2047 int ret;
2048
2049 struct ab8500_charger *di = container_of(work,
2050 struct ab8500_charger, kick_wd_work.work);
2051
2052 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
2053 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
2054 if (ret)
2055 dev_err(di->dev, "Failed to kick WD!\n");
2056
2057 /* Schedule a new watchdog kick */
2058 queue_delayed_work(di->charger_wq,
2059 &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL));
2060 }
2061
2062 /**
2063 * ab8500_charger_ac_work() - work to get and set main charger status
2064 * @work: pointer to the work_struct structure
2065 *
2066 * Work queue function for checking the main charger status
2067 */
ab8500_charger_ac_work(struct work_struct * work)2068 static void ab8500_charger_ac_work(struct work_struct *work)
2069 {
2070 int ret;
2071
2072 struct ab8500_charger *di = container_of(work,
2073 struct ab8500_charger, ac_work);
2074
2075 /*
2076 * Since we can't be sure that the events are received
2077 * synchronously, we have the check if the main charger is
2078 * connected by reading the status register
2079 */
2080 ret = ab8500_charger_detect_chargers(di, false);
2081 if (ret < 0)
2082 return;
2083
2084 if (ret & AC_PW_CONN) {
2085 di->ac.charger_connected = 1;
2086 di->ac_conn = true;
2087 } else {
2088 di->ac.charger_connected = 0;
2089 }
2090
2091 ab8500_power_supply_changed(di, di->ac_chg.psy);
2092 sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
2093 }
2094
ab8500_charger_usb_attached_work(struct work_struct * work)2095 static void ab8500_charger_usb_attached_work(struct work_struct *work)
2096 {
2097 struct ab8500_charger *di = container_of(work,
2098 struct ab8500_charger,
2099 usb_charger_attached_work.work);
2100 int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC);
2101 int ret, i;
2102 u8 statval;
2103
2104 for (i = 0; i < 10; i++) {
2105 ret = abx500_get_register_interruptible(di->dev,
2106 AB8500_CHARGER,
2107 AB8500_CH_USBCH_STAT1_REG,
2108 &statval);
2109 if (ret < 0) {
2110 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2111 goto reschedule;
2112 }
2113 if ((statval & usbch) != usbch)
2114 goto reschedule;
2115
2116 msleep(CHARGER_STATUS_POLL);
2117 }
2118
2119 ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0);
2120
2121 mutex_lock(&di->charger_attached_mutex);
2122 mutex_unlock(&di->charger_attached_mutex);
2123
2124 return;
2125
2126 reschedule:
2127 queue_delayed_work(di->charger_wq,
2128 &di->usb_charger_attached_work,
2129 HZ);
2130 }
2131
ab8500_charger_ac_attached_work(struct work_struct * work)2132 static void ab8500_charger_ac_attached_work(struct work_struct *work)
2133 {
2134
2135 struct ab8500_charger *di = container_of(work,
2136 struct ab8500_charger,
2137 ac_charger_attached_work.work);
2138 int mainch = (MAIN_CH_STATUS2_MAINCHGDROP |
2139 MAIN_CH_STATUS2_MAINCHARGERDETDBNC);
2140 int ret, i;
2141 u8 statval;
2142
2143 for (i = 0; i < 10; i++) {
2144 ret = abx500_get_register_interruptible(di->dev,
2145 AB8500_CHARGER,
2146 AB8500_CH_STATUS2_REG,
2147 &statval);
2148 if (ret < 0) {
2149 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2150 goto reschedule;
2151 }
2152
2153 if ((statval & mainch) != mainch)
2154 goto reschedule;
2155
2156 msleep(CHARGER_STATUS_POLL);
2157 }
2158
2159 ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0);
2160 queue_work(di->charger_wq, &di->ac_work);
2161
2162 mutex_lock(&di->charger_attached_mutex);
2163 mutex_unlock(&di->charger_attached_mutex);
2164
2165 return;
2166
2167 reschedule:
2168 queue_delayed_work(di->charger_wq,
2169 &di->ac_charger_attached_work,
2170 HZ);
2171 }
2172
2173 /**
2174 * ab8500_charger_detect_usb_type_work() - work to detect USB type
2175 * @work: Pointer to the work_struct structure
2176 *
2177 * Detect the type of USB plugged
2178 */
ab8500_charger_detect_usb_type_work(struct work_struct * work)2179 static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
2180 {
2181 int ret;
2182
2183 struct ab8500_charger *di = container_of(work,
2184 struct ab8500_charger, detect_usb_type_work);
2185
2186 /*
2187 * Since we can't be sure that the events are received
2188 * synchronously, we have the check if is
2189 * connected by reading the status register
2190 */
2191 ret = ab8500_charger_detect_chargers(di, false);
2192 if (ret < 0)
2193 return;
2194
2195 if (!(ret & USB_PW_CONN)) {
2196 dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__);
2197 di->vbus_detected = false;
2198 ab8500_charger_set_usb_connected(di, false);
2199 ab8500_power_supply_changed(di, di->usb_chg.psy);
2200 } else {
2201 dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__);
2202 di->vbus_detected = true;
2203
2204 if (is_ab8500_1p1_or_earlier(di->parent)) {
2205 ret = ab8500_charger_detect_usb_type(di);
2206 if (!ret) {
2207 ab8500_charger_set_usb_connected(di, true);
2208 ab8500_power_supply_changed(di,
2209 di->usb_chg.psy);
2210 }
2211 } else {
2212 /*
2213 * For ABB cut2.0 and onwards we have an IRQ,
2214 * USB_LINK_STATUS that will be triggered when the USB
2215 * link status changes. The exception is USB connected
2216 * during startup. Then we don't get a
2217 * USB_LINK_STATUS IRQ
2218 */
2219 if (di->vbus_detected_start) {
2220 di->vbus_detected_start = false;
2221 ret = ab8500_charger_detect_usb_type(di);
2222 if (!ret) {
2223 ab8500_charger_set_usb_connected(di,
2224 true);
2225 ab8500_power_supply_changed(di,
2226 di->usb_chg.psy);
2227 }
2228 }
2229 }
2230 }
2231 }
2232
2233 /**
2234 * ab8500_charger_usb_link_attach_work() - work to detect USB type
2235 * @work: pointer to the work_struct structure
2236 *
2237 * Detect the type of USB plugged
2238 */
ab8500_charger_usb_link_attach_work(struct work_struct * work)2239 static void ab8500_charger_usb_link_attach_work(struct work_struct *work)
2240 {
2241 struct ab8500_charger *di =
2242 container_of(work, struct ab8500_charger, attach_work.work);
2243 int ret;
2244
2245 /* Update maximum input current if USB enumeration is not detected */
2246 if (!di->usb.charger_online) {
2247 ret = ab8500_charger_set_vbus_in_curr(di,
2248 di->max_usb_in_curr.usb_type_max);
2249 if (ret)
2250 return;
2251 }
2252
2253 ab8500_charger_set_usb_connected(di, true);
2254 ab8500_power_supply_changed(di, di->usb_chg.psy);
2255 }
2256
2257 /**
2258 * ab8500_charger_usb_link_status_work() - work to detect USB type
2259 * @work: pointer to the work_struct structure
2260 *
2261 * Detect the type of USB plugged
2262 */
ab8500_charger_usb_link_status_work(struct work_struct * work)2263 static void ab8500_charger_usb_link_status_work(struct work_struct *work)
2264 {
2265 int detected_chargers;
2266 int ret;
2267 u8 val;
2268 u8 link_status;
2269
2270 struct ab8500_charger *di = container_of(work,
2271 struct ab8500_charger, usb_link_status_work);
2272
2273 /*
2274 * Since we can't be sure that the events are received
2275 * synchronously, we have the check if is
2276 * connected by reading the status register
2277 */
2278 detected_chargers = ab8500_charger_detect_chargers(di, false);
2279 if (detected_chargers < 0)
2280 return;
2281
2282 /*
2283 * Some chargers that breaks the USB spec is
2284 * identified as invalid by AB8500 and it refuse
2285 * to start the charging process. but by jumping
2286 * through a few hoops it can be forced to start.
2287 */
2288 if (is_ab8500(di->parent))
2289 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2290 AB8500_USB_LINE_STAT_REG, &val);
2291 else
2292 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2293 AB8500_USB_LINK1_STAT_REG, &val);
2294
2295 if (ret >= 0)
2296 dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val);
2297 else
2298 dev_dbg(di->dev, "Error reading USB link status\n");
2299
2300 if (is_ab8500(di->parent))
2301 link_status = AB8500_USB_LINK_STATUS;
2302 else
2303 link_status = AB8505_USB_LINK_STATUS;
2304
2305 if (detected_chargers & USB_PW_CONN) {
2306 if (((val & link_status) >> USB_LINK_STATUS_SHIFT) ==
2307 USB_STAT_NOT_VALID_LINK &&
2308 di->invalid_charger_detect_state == 0) {
2309 dev_dbg(di->dev,
2310 "Invalid charger detected, state= 0\n");
2311 /*Enable charger*/
2312 abx500_mask_and_set_register_interruptible(di->dev,
2313 AB8500_CHARGER, AB8500_USBCH_CTRL1_REG,
2314 USB_CH_ENA, USB_CH_ENA);
2315 /*Enable charger detection*/
2316 abx500_mask_and_set_register_interruptible(di->dev,
2317 AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2318 USB_CH_DET, USB_CH_DET);
2319 di->invalid_charger_detect_state = 1;
2320 /*exit and wait for new link status interrupt.*/
2321 return;
2322
2323 }
2324 if (di->invalid_charger_detect_state == 1) {
2325 dev_dbg(di->dev,
2326 "Invalid charger detected, state= 1\n");
2327 /*Stop charger detection*/
2328 abx500_mask_and_set_register_interruptible(di->dev,
2329 AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2330 USB_CH_DET, 0x00);
2331 /*Check link status*/
2332 if (is_ab8500(di->parent))
2333 ret = abx500_get_register_interruptible(di->dev,
2334 AB8500_USB, AB8500_USB_LINE_STAT_REG,
2335 &val);
2336 else
2337 ret = abx500_get_register_interruptible(di->dev,
2338 AB8500_USB, AB8500_USB_LINK1_STAT_REG,
2339 &val);
2340
2341 dev_dbg(di->dev, "USB link status= 0x%02x\n",
2342 (val & link_status) >> USB_LINK_STATUS_SHIFT);
2343 di->invalid_charger_detect_state = 2;
2344 }
2345 } else {
2346 di->invalid_charger_detect_state = 0;
2347 }
2348
2349 if (!(detected_chargers & USB_PW_CONN)) {
2350 di->vbus_detected = false;
2351 ab8500_charger_set_usb_connected(di, false);
2352 ab8500_power_supply_changed(di, di->usb_chg.psy);
2353 return;
2354 }
2355
2356 dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__);
2357 di->vbus_detected = true;
2358 ret = ab8500_charger_read_usb_type(di);
2359 if (ret) {
2360 if (ret == -ENXIO) {
2361 /* No valid charger type detected */
2362 ab8500_charger_set_usb_connected(di, false);
2363 ab8500_power_supply_changed(di, di->usb_chg.psy);
2364 }
2365 return;
2366 }
2367
2368 if (di->usb_device_is_unrecognised) {
2369 dev_dbg(di->dev,
2370 "Potential Legacy Charger device. "
2371 "Delay work for %d msec for USB enum "
2372 "to finish",
2373 WAIT_ACA_RID_ENUMERATION);
2374 queue_delayed_work(di->charger_wq,
2375 &di->attach_work,
2376 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2377 } else if (di->is_aca_rid == 1) {
2378 /* Only wait once */
2379 di->is_aca_rid++;
2380 dev_dbg(di->dev,
2381 "%s Wait %d msec for USB enum to finish",
2382 __func__, WAIT_ACA_RID_ENUMERATION);
2383 queue_delayed_work(di->charger_wq,
2384 &di->attach_work,
2385 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2386 } else {
2387 queue_delayed_work(di->charger_wq,
2388 &di->attach_work,
2389 0);
2390 }
2391 }
2392
ab8500_charger_usb_state_changed_work(struct work_struct * work)2393 static void ab8500_charger_usb_state_changed_work(struct work_struct *work)
2394 {
2395 int ret;
2396 unsigned long flags;
2397
2398 struct ab8500_charger *di = container_of(work,
2399 struct ab8500_charger, usb_state_changed_work.work);
2400
2401 if (!di->vbus_detected) {
2402 dev_dbg(di->dev,
2403 "%s !di->vbus_detected\n",
2404 __func__);
2405 return;
2406 }
2407
2408 spin_lock_irqsave(&di->usb_state.usb_lock, flags);
2409 di->usb_state.state = di->usb_state.state_tmp;
2410 di->usb_state.usb_current = di->usb_state.usb_current_tmp;
2411 spin_unlock_irqrestore(&di->usb_state.usb_lock, flags);
2412
2413 dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n",
2414 __func__, di->usb_state.state, di->usb_state.usb_current);
2415
2416 switch (di->usb_state.state) {
2417 case AB8500_BM_USB_STATE_RESET_HS:
2418 case AB8500_BM_USB_STATE_RESET_FS:
2419 case AB8500_BM_USB_STATE_SUSPEND:
2420 case AB8500_BM_USB_STATE_MAX:
2421 ab8500_charger_set_usb_connected(di, false);
2422 ab8500_power_supply_changed(di, di->usb_chg.psy);
2423 break;
2424
2425 case AB8500_BM_USB_STATE_RESUME:
2426 /*
2427 * when suspend->resume there should be delay
2428 * of 1sec for enabling charging
2429 */
2430 msleep(1000);
2431 fallthrough;
2432 case AB8500_BM_USB_STATE_CONFIGURED:
2433 /*
2434 * USB is configured, enable charging with the charging
2435 * input current obtained from USB driver
2436 */
2437 if (!ab8500_charger_get_usb_cur(di)) {
2438 /* Update maximum input current */
2439 ret = ab8500_charger_set_vbus_in_curr(di,
2440 di->max_usb_in_curr.usb_type_max);
2441 if (ret)
2442 return;
2443
2444 ab8500_charger_set_usb_connected(di, true);
2445 ab8500_power_supply_changed(di, di->usb_chg.psy);
2446 }
2447 break;
2448
2449 default:
2450 break;
2451 }
2452 }
2453
2454 /**
2455 * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status
2456 * @work: pointer to the work_struct structure
2457 *
2458 * Work queue function for checking the USB charger Not OK status
2459 */
ab8500_charger_check_usbchargernotok_work(struct work_struct * work)2460 static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work)
2461 {
2462 int ret;
2463 u8 reg_value;
2464 bool prev_status;
2465
2466 struct ab8500_charger *di = container_of(work,
2467 struct ab8500_charger, check_usbchgnotok_work.work);
2468
2469 /* Check if the status bit for usbchargernotok is still active */
2470 ret = abx500_get_register_interruptible(di->dev,
2471 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value);
2472 if (ret < 0) {
2473 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2474 return;
2475 }
2476 prev_status = di->flags.usbchargernotok;
2477
2478 if (reg_value & VBUS_CH_NOK) {
2479 di->flags.usbchargernotok = true;
2480 /* Check again in 1sec */
2481 queue_delayed_work(di->charger_wq,
2482 &di->check_usbchgnotok_work, HZ);
2483 } else {
2484 di->flags.usbchargernotok = false;
2485 di->flags.vbus_collapse = false;
2486 }
2487
2488 if (prev_status != di->flags.usbchargernotok)
2489 ab8500_power_supply_changed(di, di->usb_chg.psy);
2490 }
2491
2492 /**
2493 * ab8500_charger_check_main_thermal_prot_work() - check main thermal status
2494 * @work: pointer to the work_struct structure
2495 *
2496 * Work queue function for checking the Main thermal prot status
2497 */
ab8500_charger_check_main_thermal_prot_work(struct work_struct * work)2498 static void ab8500_charger_check_main_thermal_prot_work(
2499 struct work_struct *work)
2500 {
2501 int ret;
2502 u8 reg_value;
2503
2504 struct ab8500_charger *di = container_of(work,
2505 struct ab8500_charger, check_main_thermal_prot_work);
2506
2507 /* Check if the status bit for main_thermal_prot is still active */
2508 ret = abx500_get_register_interruptible(di->dev,
2509 AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value);
2510 if (ret < 0) {
2511 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2512 return;
2513 }
2514 if (reg_value & MAIN_CH_TH_PROT)
2515 di->flags.main_thermal_prot = true;
2516 else
2517 di->flags.main_thermal_prot = false;
2518
2519 ab8500_power_supply_changed(di, di->ac_chg.psy);
2520 }
2521
2522 /**
2523 * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status
2524 * @work: pointer to the work_struct structure
2525 *
2526 * Work queue function for checking the USB thermal prot status
2527 */
ab8500_charger_check_usb_thermal_prot_work(struct work_struct * work)2528 static void ab8500_charger_check_usb_thermal_prot_work(
2529 struct work_struct *work)
2530 {
2531 int ret;
2532 u8 reg_value;
2533
2534 struct ab8500_charger *di = container_of(work,
2535 struct ab8500_charger, check_usb_thermal_prot_work);
2536
2537 /* Check if the status bit for usb_thermal_prot is still active */
2538 ret = abx500_get_register_interruptible(di->dev,
2539 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value);
2540 if (ret < 0) {
2541 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2542 return;
2543 }
2544 if (reg_value & USB_CH_TH_PROT)
2545 di->flags.usb_thermal_prot = true;
2546 else
2547 di->flags.usb_thermal_prot = false;
2548
2549 ab8500_power_supply_changed(di, di->usb_chg.psy);
2550 }
2551
2552 /**
2553 * ab8500_charger_mainchunplugdet_handler() - main charger unplugged
2554 * @irq: interrupt number
2555 * @_di: pointer to the ab8500_charger structure
2556 *
2557 * Returns IRQ status(IRQ_HANDLED)
2558 */
ab8500_charger_mainchunplugdet_handler(int irq,void * _di)2559 static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di)
2560 {
2561 struct ab8500_charger *di = _di;
2562
2563 dev_dbg(di->dev, "Main charger unplugged\n");
2564 queue_work(di->charger_wq, &di->ac_work);
2565
2566 cancel_delayed_work_sync(&di->ac_charger_attached_work);
2567 mutex_lock(&di->charger_attached_mutex);
2568 mutex_unlock(&di->charger_attached_mutex);
2569
2570 return IRQ_HANDLED;
2571 }
2572
2573 /**
2574 * ab8500_charger_mainchplugdet_handler() - main charger plugged
2575 * @irq: interrupt number
2576 * @_di: pointer to the ab8500_charger structure
2577 *
2578 * Returns IRQ status(IRQ_HANDLED)
2579 */
ab8500_charger_mainchplugdet_handler(int irq,void * _di)2580 static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di)
2581 {
2582 struct ab8500_charger *di = _di;
2583
2584 dev_dbg(di->dev, "Main charger plugged\n");
2585 queue_work(di->charger_wq, &di->ac_work);
2586
2587 mutex_lock(&di->charger_attached_mutex);
2588 mutex_unlock(&di->charger_attached_mutex);
2589
2590 if (is_ab8500(di->parent))
2591 queue_delayed_work(di->charger_wq,
2592 &di->ac_charger_attached_work,
2593 HZ);
2594 return IRQ_HANDLED;
2595 }
2596
2597 /**
2598 * ab8500_charger_mainextchnotok_handler() - main charger not ok
2599 * @irq: interrupt number
2600 * @_di: pointer to the ab8500_charger structure
2601 *
2602 * Returns IRQ status(IRQ_HANDLED)
2603 */
ab8500_charger_mainextchnotok_handler(int irq,void * _di)2604 static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di)
2605 {
2606 struct ab8500_charger *di = _di;
2607
2608 dev_dbg(di->dev, "Main charger not ok\n");
2609 di->flags.mainextchnotok = true;
2610 ab8500_power_supply_changed(di, di->ac_chg.psy);
2611
2612 /* Schedule a new HW failure check */
2613 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2614
2615 return IRQ_HANDLED;
2616 }
2617
2618 /**
2619 * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger
2620 * thermal protection threshold
2621 * @irq: interrupt number
2622 * @_di: pointer to the ab8500_charger structure
2623 *
2624 * Returns IRQ status(IRQ_HANDLED)
2625 */
ab8500_charger_mainchthprotr_handler(int irq,void * _di)2626 static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di)
2627 {
2628 struct ab8500_charger *di = _di;
2629
2630 dev_dbg(di->dev,
2631 "Die temp above Main charger thermal protection threshold\n");
2632 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2633
2634 return IRQ_HANDLED;
2635 }
2636
2637 /**
2638 * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger
2639 * thermal protection threshold
2640 * @irq: interrupt number
2641 * @_di: pointer to the ab8500_charger structure
2642 *
2643 * Returns IRQ status(IRQ_HANDLED)
2644 */
ab8500_charger_mainchthprotf_handler(int irq,void * _di)2645 static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di)
2646 {
2647 struct ab8500_charger *di = _di;
2648
2649 dev_dbg(di->dev,
2650 "Die temp ok for Main charger thermal protection threshold\n");
2651 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2652
2653 return IRQ_HANDLED;
2654 }
2655
ab8500_charger_vbus_drop_end_work(struct work_struct * work)2656 static void ab8500_charger_vbus_drop_end_work(struct work_struct *work)
2657 {
2658 struct ab8500_charger *di = container_of(work,
2659 struct ab8500_charger, vbus_drop_end_work.work);
2660 int ret, curr;
2661 u8 reg_value;
2662
2663 di->flags.vbus_drop_end = false;
2664
2665 /* Reset the drop counter */
2666 abx500_set_register_interruptible(di->dev,
2667 AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01);
2668
2669 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
2670 AB8500_CH_USBCH_STAT2_REG, ®_value);
2671 if (ret < 0) {
2672 dev_err(di->dev, "%s read failed\n", __func__);
2673 return;
2674 }
2675
2676 curr = di->bm->chg_input_curr[
2677 reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT];
2678
2679 if (di->max_usb_in_curr.calculated_max != curr) {
2680 /* USB source is collapsing */
2681 di->max_usb_in_curr.calculated_max = curr;
2682 dev_dbg(di->dev,
2683 "VBUS input current limiting to %d mA\n",
2684 di->max_usb_in_curr.calculated_max);
2685 } else {
2686 /*
2687 * USB source can not give more than this amount.
2688 * Taking more will collapse the source.
2689 */
2690 di->max_usb_in_curr.set_max =
2691 di->max_usb_in_curr.calculated_max;
2692 dev_dbg(di->dev,
2693 "VBUS input current limited to %d mA\n",
2694 di->max_usb_in_curr.set_max);
2695 }
2696
2697 if (di->usb.charger_connected)
2698 ab8500_charger_set_vbus_in_curr(di,
2699 di->max_usb_in_curr.usb_type_max);
2700 }
2701
2702 /**
2703 * ab8500_charger_vbusdetf_handler() - VBUS falling detected
2704 * @irq: interrupt number
2705 * @_di: pointer to the ab8500_charger structure
2706 *
2707 * Returns IRQ status(IRQ_HANDLED)
2708 */
ab8500_charger_vbusdetf_handler(int irq,void * _di)2709 static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di)
2710 {
2711 struct ab8500_charger *di = _di;
2712
2713 di->vbus_detected = false;
2714 dev_dbg(di->dev, "VBUS falling detected\n");
2715 queue_work(di->charger_wq, &di->detect_usb_type_work);
2716
2717 return IRQ_HANDLED;
2718 }
2719
2720 /**
2721 * ab8500_charger_vbusdetr_handler() - VBUS rising detected
2722 * @irq: interrupt number
2723 * @_di: pointer to the ab8500_charger structure
2724 *
2725 * Returns IRQ status(IRQ_HANDLED)
2726 */
ab8500_charger_vbusdetr_handler(int irq,void * _di)2727 static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di)
2728 {
2729 struct ab8500_charger *di = _di;
2730
2731 di->vbus_detected = true;
2732 dev_dbg(di->dev, "VBUS rising detected\n");
2733
2734 queue_work(di->charger_wq, &di->detect_usb_type_work);
2735
2736 return IRQ_HANDLED;
2737 }
2738
2739 /**
2740 * ab8500_charger_usblinkstatus_handler() - USB link status has changed
2741 * @irq: interrupt number
2742 * @_di: pointer to the ab8500_charger structure
2743 *
2744 * Returns IRQ status(IRQ_HANDLED)
2745 */
ab8500_charger_usblinkstatus_handler(int irq,void * _di)2746 static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di)
2747 {
2748 struct ab8500_charger *di = _di;
2749
2750 dev_dbg(di->dev, "USB link status changed\n");
2751
2752 queue_work(di->charger_wq, &di->usb_link_status_work);
2753
2754 return IRQ_HANDLED;
2755 }
2756
2757 /**
2758 * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger
2759 * thermal protection threshold
2760 * @irq: interrupt number
2761 * @_di: pointer to the ab8500_charger structure
2762 *
2763 * Returns IRQ status(IRQ_HANDLED)
2764 */
ab8500_charger_usbchthprotr_handler(int irq,void * _di)2765 static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di)
2766 {
2767 struct ab8500_charger *di = _di;
2768
2769 dev_dbg(di->dev,
2770 "Die temp above USB charger thermal protection threshold\n");
2771 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2772
2773 return IRQ_HANDLED;
2774 }
2775
2776 /**
2777 * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger
2778 * thermal protection threshold
2779 * @irq: interrupt number
2780 * @_di: pointer to the ab8500_charger structure
2781 *
2782 * Returns IRQ status(IRQ_HANDLED)
2783 */
ab8500_charger_usbchthprotf_handler(int irq,void * _di)2784 static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di)
2785 {
2786 struct ab8500_charger *di = _di;
2787
2788 dev_dbg(di->dev,
2789 "Die temp ok for USB charger thermal protection threshold\n");
2790 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2791
2792 return IRQ_HANDLED;
2793 }
2794
2795 /**
2796 * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected
2797 * @irq: interrupt number
2798 * @_di: pointer to the ab8500_charger structure
2799 *
2800 * Returns IRQ status(IRQ_HANDLED)
2801 */
ab8500_charger_usbchargernotokr_handler(int irq,void * _di)2802 static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di)
2803 {
2804 struct ab8500_charger *di = _di;
2805
2806 dev_dbg(di->dev, "Not allowed USB charger detected\n");
2807 queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0);
2808
2809 return IRQ_HANDLED;
2810 }
2811
2812 /**
2813 * ab8500_charger_chwdexp_handler() - Charger watchdog expired
2814 * @irq: interrupt number
2815 * @_di: pointer to the ab8500_charger structure
2816 *
2817 * Returns IRQ status(IRQ_HANDLED)
2818 */
ab8500_charger_chwdexp_handler(int irq,void * _di)2819 static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di)
2820 {
2821 struct ab8500_charger *di = _di;
2822
2823 dev_dbg(di->dev, "Charger watchdog expired\n");
2824
2825 /*
2826 * The charger that was online when the watchdog expired
2827 * needs to be restarted for charging to start again
2828 */
2829 if (di->ac.charger_online) {
2830 di->ac.wd_expired = true;
2831 ab8500_power_supply_changed(di, di->ac_chg.psy);
2832 }
2833 if (di->usb.charger_online) {
2834 di->usb.wd_expired = true;
2835 ab8500_power_supply_changed(di, di->usb_chg.psy);
2836 }
2837
2838 return IRQ_HANDLED;
2839 }
2840
2841 /**
2842 * ab8500_charger_vbuschdropend_handler() - VBUS drop removed
2843 * @irq: interrupt number
2844 * @_di: pointer to the ab8500_charger structure
2845 *
2846 * Returns IRQ status(IRQ_HANDLED)
2847 */
ab8500_charger_vbuschdropend_handler(int irq,void * _di)2848 static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di)
2849 {
2850 struct ab8500_charger *di = _di;
2851
2852 dev_dbg(di->dev, "VBUS charger drop ended\n");
2853 di->flags.vbus_drop_end = true;
2854
2855 /*
2856 * VBUS might have dropped due to bad connection.
2857 * Schedule a new input limit set to the value SW requests.
2858 */
2859 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work,
2860 round_jiffies(VBUS_IN_CURR_LIM_RETRY_SET_TIME * HZ));
2861
2862 return IRQ_HANDLED;
2863 }
2864
2865 /**
2866 * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected
2867 * @irq: interrupt number
2868 * @_di: pointer to the ab8500_charger structure
2869 *
2870 * Returns IRQ status(IRQ_HANDLED)
2871 */
ab8500_charger_vbusovv_handler(int irq,void * _di)2872 static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di)
2873 {
2874 struct ab8500_charger *di = _di;
2875
2876 dev_dbg(di->dev, "VBUS overvoltage detected\n");
2877 di->flags.vbus_ovv = true;
2878 ab8500_power_supply_changed(di, di->usb_chg.psy);
2879
2880 /* Schedule a new HW failure check */
2881 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2882
2883 return IRQ_HANDLED;
2884 }
2885
2886 /**
2887 * ab8500_charger_ac_get_property() - get the ac/mains properties
2888 * @psy: pointer to the power_supply structure
2889 * @psp: pointer to the power_supply_property structure
2890 * @val: pointer to the power_supply_propval union
2891 *
2892 * This function gets called when an application tries to get the ac/mains
2893 * properties by reading the sysfs files.
2894 * AC/Mains properties are online, present and voltage.
2895 * online: ac/mains charging is in progress or not
2896 * present: presence of the ac/mains
2897 * voltage: AC/Mains voltage
2898 * Returns error code in case of failure else 0(on success)
2899 */
ab8500_charger_ac_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)2900 static int ab8500_charger_ac_get_property(struct power_supply *psy,
2901 enum power_supply_property psp,
2902 union power_supply_propval *val)
2903 {
2904 struct ab8500_charger *di;
2905 int ret;
2906
2907 di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy));
2908
2909 switch (psp) {
2910 case POWER_SUPPLY_PROP_HEALTH:
2911 if (di->flags.mainextchnotok)
2912 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2913 else if (di->ac.wd_expired || di->usb.wd_expired)
2914 val->intval = POWER_SUPPLY_HEALTH_DEAD;
2915 else if (di->flags.main_thermal_prot)
2916 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2917 else
2918 val->intval = POWER_SUPPLY_HEALTH_GOOD;
2919 break;
2920 case POWER_SUPPLY_PROP_ONLINE:
2921 val->intval = di->ac.charger_online;
2922 break;
2923 case POWER_SUPPLY_PROP_PRESENT:
2924 val->intval = di->ac.charger_connected;
2925 break;
2926 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2927 ret = ab8500_charger_get_ac_voltage(di);
2928 if (ret >= 0)
2929 di->ac.charger_voltage = ret;
2930 /* On error, use previous value */
2931 val->intval = di->ac.charger_voltage * 1000;
2932 break;
2933 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2934 /*
2935 * This property is used to indicate when CV mode is entered
2936 * for the AC charger
2937 */
2938 di->ac.cv_active = ab8500_charger_ac_cv(di);
2939 val->intval = di->ac.cv_active;
2940 break;
2941 case POWER_SUPPLY_PROP_CURRENT_NOW:
2942 ret = ab8500_charger_get_ac_current(di);
2943 if (ret >= 0)
2944 di->ac.charger_current = ret;
2945 val->intval = di->ac.charger_current * 1000;
2946 break;
2947 default:
2948 return -EINVAL;
2949 }
2950 return 0;
2951 }
2952
2953 /**
2954 * ab8500_charger_usb_get_property() - get the usb properties
2955 * @psy: pointer to the power_supply structure
2956 * @psp: pointer to the power_supply_property structure
2957 * @val: pointer to the power_supply_propval union
2958 *
2959 * This function gets called when an application tries to get the usb
2960 * properties by reading the sysfs files.
2961 * USB properties are online, present and voltage.
2962 * online: usb charging is in progress or not
2963 * present: presence of the usb
2964 * voltage: vbus voltage
2965 * Returns error code in case of failure else 0(on success)
2966 */
ab8500_charger_usb_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)2967 static int ab8500_charger_usb_get_property(struct power_supply *psy,
2968 enum power_supply_property psp,
2969 union power_supply_propval *val)
2970 {
2971 struct ab8500_charger *di;
2972 int ret;
2973
2974 di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy));
2975
2976 switch (psp) {
2977 case POWER_SUPPLY_PROP_HEALTH:
2978 if (di->flags.usbchargernotok)
2979 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2980 else if (di->ac.wd_expired || di->usb.wd_expired)
2981 val->intval = POWER_SUPPLY_HEALTH_DEAD;
2982 else if (di->flags.usb_thermal_prot)
2983 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2984 else if (di->flags.vbus_ovv)
2985 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
2986 else
2987 val->intval = POWER_SUPPLY_HEALTH_GOOD;
2988 break;
2989 case POWER_SUPPLY_PROP_ONLINE:
2990 val->intval = di->usb.charger_online;
2991 break;
2992 case POWER_SUPPLY_PROP_PRESENT:
2993 val->intval = di->usb.charger_connected;
2994 break;
2995 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2996 ret = ab8500_charger_get_vbus_voltage(di);
2997 if (ret >= 0)
2998 di->usb.charger_voltage = ret;
2999 val->intval = di->usb.charger_voltage * 1000;
3000 break;
3001 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
3002 /*
3003 * This property is used to indicate when CV mode is entered
3004 * for the USB charger
3005 */
3006 di->usb.cv_active = ab8500_charger_usb_cv(di);
3007 val->intval = di->usb.cv_active;
3008 break;
3009 case POWER_SUPPLY_PROP_CURRENT_NOW:
3010 ret = ab8500_charger_get_usb_current(di);
3011 if (ret >= 0)
3012 di->usb.charger_current = ret;
3013 val->intval = di->usb.charger_current * 1000;
3014 break;
3015 case POWER_SUPPLY_PROP_CURRENT_AVG:
3016 /*
3017 * This property is used to indicate when VBUS has collapsed
3018 * due to too high output current from the USB charger
3019 */
3020 if (di->flags.vbus_collapse)
3021 val->intval = 1;
3022 else
3023 val->intval = 0;
3024 break;
3025 default:
3026 return -EINVAL;
3027 }
3028 return 0;
3029 }
3030
3031 /**
3032 * ab8500_charger_init_hw_registers() - Set up charger related registers
3033 * @di: pointer to the ab8500_charger structure
3034 *
3035 * Set up charger OVV, watchdog and maximum voltage registers as well as
3036 * charging of the backup battery
3037 */
ab8500_charger_init_hw_registers(struct ab8500_charger * di)3038 static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
3039 {
3040 int ret = 0;
3041
3042 /* Setup maximum charger current and voltage for ABB cut2.0 */
3043 if (!is_ab8500_1p1_or_earlier(di->parent)) {
3044 ret = abx500_set_register_interruptible(di->dev,
3045 AB8500_CHARGER,
3046 AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6);
3047 if (ret) {
3048 dev_err(di->dev,
3049 "failed to set CH_VOLT_LVL_MAX_REG\n");
3050 goto out;
3051 }
3052
3053 ret = abx500_set_register_interruptible(di->dev,
3054 AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
3055 CH_OP_CUR_LVL_1P6);
3056 if (ret) {
3057 dev_err(di->dev,
3058 "failed to set CH_OPT_CRNTLVL_MAX_REG\n");
3059 goto out;
3060 }
3061 }
3062
3063 if (is_ab8505_2p0(di->parent))
3064 ret = abx500_mask_and_set_register_interruptible(di->dev,
3065 AB8500_CHARGER,
3066 AB8500_USBCH_CTRL2_REG,
3067 VBUS_AUTO_IN_CURR_LIM_ENA,
3068 VBUS_AUTO_IN_CURR_LIM_ENA);
3069 else
3070 /*
3071 * VBUS OVV set to 6.3V and enable automatic current limitation
3072 */
3073 ret = abx500_set_register_interruptible(di->dev,
3074 AB8500_CHARGER,
3075 AB8500_USBCH_CTRL2_REG,
3076 VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA);
3077 if (ret) {
3078 dev_err(di->dev,
3079 "failed to set automatic current limitation\n");
3080 goto out;
3081 }
3082
3083 /* Enable main watchdog in OTP */
3084 ret = abx500_set_register_interruptible(di->dev,
3085 AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD);
3086 if (ret) {
3087 dev_err(di->dev, "failed to enable main WD in OTP\n");
3088 goto out;
3089 }
3090
3091 /* Enable main watchdog */
3092 ret = abx500_set_register_interruptible(di->dev,
3093 AB8500_SYS_CTRL2_BLOCK,
3094 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA);
3095 if (ret) {
3096 dev_err(di->dev, "failed to enable main watchdog\n");
3097 goto out;
3098 }
3099
3100 /*
3101 * Due to internal synchronisation, Enable and Kick watchdog bits
3102 * cannot be enabled in a single write.
3103 * A minimum delay of 2*32 kHz period (62.5µs) must be inserted
3104 * between writing Enable then Kick bits.
3105 */
3106 udelay(63);
3107
3108 /* Kick main watchdog */
3109 ret = abx500_set_register_interruptible(di->dev,
3110 AB8500_SYS_CTRL2_BLOCK,
3111 AB8500_MAIN_WDOG_CTRL_REG,
3112 (MAIN_WDOG_ENA | MAIN_WDOG_KICK));
3113 if (ret) {
3114 dev_err(di->dev, "failed to kick main watchdog\n");
3115 goto out;
3116 }
3117
3118 /* Disable main watchdog */
3119 ret = abx500_set_register_interruptible(di->dev,
3120 AB8500_SYS_CTRL2_BLOCK,
3121 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS);
3122 if (ret) {
3123 dev_err(di->dev, "failed to disable main watchdog\n");
3124 goto out;
3125 }
3126
3127 /* Set watchdog timeout */
3128 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3129 AB8500_CH_WD_TIMER_REG, WD_TIMER);
3130 if (ret) {
3131 dev_err(di->dev, "failed to set charger watchdog timeout\n");
3132 goto out;
3133 }
3134
3135 ret = ab8500_charger_led_en(di, false);
3136 if (ret < 0) {
3137 dev_err(di->dev, "failed to disable LED\n");
3138 goto out;
3139 }
3140
3141 ret = abx500_set_register_interruptible(di->dev,
3142 AB8500_RTC,
3143 AB8500_RTC_BACKUP_CHG_REG,
3144 (di->bm->bkup_bat_v & 0x3) | di->bm->bkup_bat_i);
3145 if (ret) {
3146 dev_err(di->dev, "failed to setup backup battery charging\n");
3147 goto out;
3148 }
3149
3150 /* Enable backup battery charging */
3151 ret = abx500_mask_and_set_register_interruptible(di->dev,
3152 AB8500_RTC, AB8500_RTC_CTRL_REG,
3153 RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
3154 if (ret < 0) {
3155 dev_err(di->dev, "%s mask and set failed\n", __func__);
3156 goto out;
3157 }
3158
3159 out:
3160 return ret;
3161 }
3162
3163 /*
3164 * ab8500 charger driver interrupts and their respective isr
3165 */
3166 static struct ab8500_charger_interrupts ab8500_charger_irq[] = {
3167 {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler},
3168 {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler},
3169 {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler},
3170 {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler},
3171 {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler},
3172 {"VBUS_DET_F", ab8500_charger_vbusdetf_handler},
3173 {"VBUS_DET_R", ab8500_charger_vbusdetr_handler},
3174 {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler},
3175 {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler},
3176 {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler},
3177 {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler},
3178 {"VBUS_OVV", ab8500_charger_vbusovv_handler},
3179 {"CH_WD_EXP", ab8500_charger_chwdexp_handler},
3180 {"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler},
3181 };
3182
ab8500_charger_usb_notifier_call(struct notifier_block * nb,unsigned long event,void * power)3183 static int ab8500_charger_usb_notifier_call(struct notifier_block *nb,
3184 unsigned long event, void *power)
3185 {
3186 struct ab8500_charger *di =
3187 container_of(nb, struct ab8500_charger, nb);
3188 enum ab8500_usb_state bm_usb_state;
3189 unsigned mA = *((unsigned *)power);
3190
3191 if (event != USB_EVENT_VBUS) {
3192 dev_dbg(di->dev, "not a standard host, returning\n");
3193 return NOTIFY_DONE;
3194 }
3195
3196 /* TODO: State is fabricate here. See if charger really needs USB
3197 * state or if mA is enough
3198 */
3199 if ((di->usb_state.usb_current == 2) && (mA > 2))
3200 bm_usb_state = AB8500_BM_USB_STATE_RESUME;
3201 else if (mA == 0)
3202 bm_usb_state = AB8500_BM_USB_STATE_RESET_HS;
3203 else if (mA == 2)
3204 bm_usb_state = AB8500_BM_USB_STATE_SUSPEND;
3205 else if (mA >= 8) /* 8, 100, 500 */
3206 bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED;
3207 else /* Should never occur */
3208 bm_usb_state = AB8500_BM_USB_STATE_RESET_FS;
3209
3210 dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n",
3211 __func__, bm_usb_state, mA);
3212
3213 spin_lock(&di->usb_state.usb_lock);
3214 di->usb_state.state_tmp = bm_usb_state;
3215 di->usb_state.usb_current_tmp = mA;
3216 spin_unlock(&di->usb_state.usb_lock);
3217
3218 /*
3219 * wait for some time until you get updates from the usb stack
3220 * and negotiations are completed
3221 */
3222 queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2);
3223
3224 return NOTIFY_OK;
3225 }
3226
ab8500_charger_resume(struct device * dev)3227 static int __maybe_unused ab8500_charger_resume(struct device *dev)
3228 {
3229 int ret;
3230 struct ab8500_charger *di = dev_get_drvdata(dev);
3231
3232 /*
3233 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3234 * logic. That means we have to continuously kick the charger
3235 * watchdog even when no charger is connected. This is only
3236 * valid once the AC charger has been enabled. This is
3237 * a bug that is not handled by the algorithm and the
3238 * watchdog have to be kicked by the charger driver
3239 * when the AC charger is disabled
3240 */
3241 if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) {
3242 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3243 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
3244 if (ret)
3245 dev_err(di->dev, "Failed to kick WD!\n");
3246
3247 /* If not already pending start a new timer */
3248 queue_delayed_work(di->charger_wq, &di->kick_wd_work,
3249 round_jiffies(WD_KICK_INTERVAL));
3250 }
3251
3252 /* If we still have a HW failure, schedule a new check */
3253 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
3254 queue_delayed_work(di->charger_wq,
3255 &di->check_hw_failure_work, 0);
3256 }
3257
3258 if (di->flags.vbus_drop_end)
3259 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0);
3260
3261 return 0;
3262 }
3263
ab8500_charger_suspend(struct device * dev)3264 static int __maybe_unused ab8500_charger_suspend(struct device *dev)
3265 {
3266 struct ab8500_charger *di = dev_get_drvdata(dev);
3267
3268 /* Cancel any pending jobs */
3269 cancel_delayed_work(&di->check_hw_failure_work);
3270 cancel_delayed_work(&di->vbus_drop_end_work);
3271
3272 flush_delayed_work(&di->attach_work);
3273 flush_delayed_work(&di->usb_charger_attached_work);
3274 flush_delayed_work(&di->ac_charger_attached_work);
3275 flush_delayed_work(&di->check_usbchgnotok_work);
3276 flush_delayed_work(&di->check_vbat_work);
3277 flush_delayed_work(&di->kick_wd_work);
3278
3279 flush_work(&di->usb_link_status_work);
3280 flush_work(&di->ac_work);
3281 flush_work(&di->detect_usb_type_work);
3282
3283 if (atomic_read(&di->current_stepping_sessions))
3284 return -EAGAIN;
3285
3286 return 0;
3287 }
3288
3289 static struct notifier_block charger_nb = {
3290 .notifier_call = ab8500_external_charger_prepare,
3291 };
3292
3293 static char *supply_interface[] = {
3294 "ab8500_chargalg",
3295 "ab8500_fg",
3296 "ab8500_btemp",
3297 };
3298
3299 static const struct power_supply_desc ab8500_ac_chg_desc = {
3300 .name = "ab8500_ac",
3301 .type = POWER_SUPPLY_TYPE_MAINS,
3302 .properties = ab8500_charger_ac_props,
3303 .num_properties = ARRAY_SIZE(ab8500_charger_ac_props),
3304 .get_property = ab8500_charger_ac_get_property,
3305 };
3306
3307 static const struct power_supply_desc ab8500_usb_chg_desc = {
3308 .name = "ab8500_usb",
3309 .type = POWER_SUPPLY_TYPE_USB,
3310 .properties = ab8500_charger_usb_props,
3311 .num_properties = ARRAY_SIZE(ab8500_charger_usb_props),
3312 .get_property = ab8500_charger_usb_get_property,
3313 };
3314
ab8500_charger_bind(struct device * dev)3315 static int ab8500_charger_bind(struct device *dev)
3316 {
3317 struct ab8500_charger *di = dev_get_drvdata(dev);
3318 int ch_stat;
3319 int ret;
3320
3321 /* Create a work queue for the charger */
3322 di->charger_wq = alloc_ordered_workqueue("ab8500_charger_wq",
3323 WQ_MEM_RECLAIM);
3324 if (di->charger_wq == NULL) {
3325 dev_err(dev, "failed to create work queue\n");
3326 return -ENOMEM;
3327 }
3328
3329 ch_stat = ab8500_charger_detect_chargers(di, false);
3330
3331 if (ch_stat & AC_PW_CONN) {
3332 if (is_ab8500(di->parent))
3333 queue_delayed_work(di->charger_wq,
3334 &di->ac_charger_attached_work,
3335 HZ);
3336 }
3337 if (ch_stat & USB_PW_CONN) {
3338 if (is_ab8500(di->parent))
3339 queue_delayed_work(di->charger_wq,
3340 &di->usb_charger_attached_work,
3341 HZ);
3342 di->vbus_detected = true;
3343 di->vbus_detected_start = true;
3344 queue_work(di->charger_wq,
3345 &di->detect_usb_type_work);
3346 }
3347
3348 ret = component_bind_all(dev, di);
3349 if (ret) {
3350 dev_err(dev, "can't bind component devices\n");
3351 return ret;
3352 }
3353
3354 return 0;
3355 }
3356
ab8500_charger_unbind(struct device * dev)3357 static void ab8500_charger_unbind(struct device *dev)
3358 {
3359 struct ab8500_charger *di = dev_get_drvdata(dev);
3360 int ret;
3361
3362 /* Disable AC charging */
3363 ab8500_charger_ac_en(&di->ac_chg, false, 0, 0);
3364
3365 /* Disable USB charging */
3366 ab8500_charger_usb_en(&di->usb_chg, false, 0, 0);
3367
3368 /* Backup battery voltage and current disable */
3369 ret = abx500_mask_and_set_register_interruptible(di->dev,
3370 AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0);
3371 if (ret < 0)
3372 dev_err(di->dev, "%s mask and set failed\n", __func__);
3373
3374 /* Delete the work queue */
3375 destroy_workqueue(di->charger_wq);
3376
3377 flush_scheduled_work();
3378
3379 /* Unbind fg, btemp, algorithm */
3380 component_unbind_all(dev, di);
3381 }
3382
3383 static const struct component_master_ops ab8500_charger_comp_ops = {
3384 .bind = ab8500_charger_bind,
3385 .unbind = ab8500_charger_unbind,
3386 };
3387
3388 static struct platform_driver *const ab8500_charger_component_drivers[] = {
3389 &ab8500_fg_driver,
3390 &ab8500_btemp_driver,
3391 &ab8500_chargalg_driver,
3392 };
3393
ab8500_charger_compare_dev(struct device * dev,void * data)3394 static int ab8500_charger_compare_dev(struct device *dev, void *data)
3395 {
3396 return dev == data;
3397 }
3398
ab8500_charger_probe(struct platform_device * pdev)3399 static int ab8500_charger_probe(struct platform_device *pdev)
3400 {
3401 struct device *dev = &pdev->dev;
3402 struct device_node *np = dev->of_node;
3403 struct component_match *match = NULL;
3404 struct power_supply_config ac_psy_cfg = {}, usb_psy_cfg = {};
3405 struct ab8500_charger *di;
3406 int charger_status;
3407 int i, irq;
3408 int ret;
3409
3410 di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
3411 if (!di)
3412 return -ENOMEM;
3413
3414 di->bm = &ab8500_bm_data;
3415
3416 ret = ab8500_bm_of_probe(dev, np, di->bm);
3417 if (ret) {
3418 dev_err(dev, "failed to get battery information\n");
3419 return ret;
3420 }
3421 di->autopower_cfg = of_property_read_bool(np, "autopower_cfg");
3422
3423 /* get parent data */
3424 di->dev = dev;
3425 di->parent = dev_get_drvdata(pdev->dev.parent);
3426
3427 /* Get ADC channels */
3428 di->adc_main_charger_v = devm_iio_channel_get(dev, "main_charger_v");
3429 if (IS_ERR(di->adc_main_charger_v)) {
3430 ret = dev_err_probe(dev, PTR_ERR(di->adc_main_charger_v),
3431 "failed to get ADC main charger voltage\n");
3432 return ret;
3433 }
3434 di->adc_main_charger_c = devm_iio_channel_get(dev, "main_charger_c");
3435 if (IS_ERR(di->adc_main_charger_c)) {
3436 ret = dev_err_probe(dev, PTR_ERR(di->adc_main_charger_c),
3437 "failed to get ADC main charger current\n");
3438 return ret;
3439 }
3440 di->adc_vbus_v = devm_iio_channel_get(dev, "vbus_v");
3441 if (IS_ERR(di->adc_vbus_v)) {
3442 ret = dev_err_probe(dev, PTR_ERR(di->adc_vbus_v),
3443 "failed to get ADC USB charger voltage\n");
3444 return ret;
3445 }
3446 di->adc_usb_charger_c = devm_iio_channel_get(dev, "usb_charger_c");
3447 if (IS_ERR(di->adc_usb_charger_c)) {
3448 ret = dev_err_probe(dev, PTR_ERR(di->adc_usb_charger_c),
3449 "failed to get ADC USB charger current\n");
3450 return ret;
3451 }
3452
3453 /*
3454 * VDD ADC supply needs to be enabled from this driver when there
3455 * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
3456 * interrupts during charging
3457 */
3458 di->regu = devm_regulator_get(dev, "vddadc");
3459 if (IS_ERR(di->regu)) {
3460 ret = PTR_ERR(di->regu);
3461 dev_err(dev, "failed to get vddadc regulator\n");
3462 return ret;
3463 }
3464
3465 /* Request interrupts */
3466 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
3467 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3468 if (irq < 0)
3469 return irq;
3470
3471 ret = devm_request_threaded_irq(dev,
3472 irq, NULL, ab8500_charger_irq[i].isr,
3473 IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT,
3474 ab8500_charger_irq[i].name, di);
3475
3476 if (ret != 0) {
3477 dev_err(dev, "failed to request %s IRQ %d: %d\n"
3478 , ab8500_charger_irq[i].name, irq, ret);
3479 return ret;
3480 }
3481 dev_dbg(dev, "Requested %s IRQ %d: %d\n",
3482 ab8500_charger_irq[i].name, irq, ret);
3483 }
3484
3485 /* initialize lock */
3486 spin_lock_init(&di->usb_state.usb_lock);
3487 mutex_init(&di->usb_ipt_crnt_lock);
3488
3489 di->autopower = false;
3490 di->invalid_charger_detect_state = 0;
3491
3492 /* AC and USB supply config */
3493 ac_psy_cfg.supplied_to = supply_interface;
3494 ac_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
3495 ac_psy_cfg.drv_data = &di->ac_chg;
3496 usb_psy_cfg.supplied_to = supply_interface;
3497 usb_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
3498 usb_psy_cfg.drv_data = &di->usb_chg;
3499
3500 /* AC supply */
3501 /* ux500_charger sub-class */
3502 di->ac_chg.ops.enable = &ab8500_charger_ac_en;
3503 di->ac_chg.ops.check_enable = &ab8500_charger_ac_check_enable;
3504 di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3505 di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3506 di->ac_chg.max_out_volt = ab8500_charger_voltage_map[
3507 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3508 di->ac_chg.max_out_curr =
3509 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3510 di->ac_chg.wdt_refresh = CHG_WD_INTERVAL;
3511 /*
3512 * The AB8505 only supports USB charging. If we are not the
3513 * AB8505, register an AC charger.
3514 *
3515 * TODO: if this should be opt-in, add DT properties for this.
3516 */
3517 if (!is_ab8505(di->parent))
3518 di->ac_chg.enabled = true;
3519 di->ac_chg.external = false;
3520
3521 /* USB supply */
3522 /* ux500_charger sub-class */
3523 di->usb_chg.ops.enable = &ab8500_charger_usb_en;
3524 di->usb_chg.ops.check_enable = &ab8500_charger_usb_check_enable;
3525 di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3526 di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3527 di->usb_chg.max_out_volt = ab8500_charger_voltage_map[
3528 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3529 di->usb_chg.max_out_curr =
3530 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3531 di->usb_chg.wdt_refresh = CHG_WD_INTERVAL;
3532 di->usb_chg.external = false;
3533 di->usb_state.usb_current = -1;
3534
3535 mutex_init(&di->charger_attached_mutex);
3536
3537 /* Init work for HW failure check */
3538 INIT_DEFERRABLE_WORK(&di->check_hw_failure_work,
3539 ab8500_charger_check_hw_failure_work);
3540 INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work,
3541 ab8500_charger_check_usbchargernotok_work);
3542
3543 INIT_DELAYED_WORK(&di->ac_charger_attached_work,
3544 ab8500_charger_ac_attached_work);
3545 INIT_DELAYED_WORK(&di->usb_charger_attached_work,
3546 ab8500_charger_usb_attached_work);
3547
3548 /*
3549 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3550 * logic. That means we have to continuously kick the charger
3551 * watchdog even when no charger is connected. This is only
3552 * valid once the AC charger has been enabled. This is
3553 * a bug that is not handled by the algorithm and the
3554 * watchdog have to be kicked by the charger driver
3555 * when the AC charger is disabled
3556 */
3557 INIT_DEFERRABLE_WORK(&di->kick_wd_work,
3558 ab8500_charger_kick_watchdog_work);
3559
3560 INIT_DEFERRABLE_WORK(&di->check_vbat_work,
3561 ab8500_charger_check_vbat_work);
3562
3563 INIT_DELAYED_WORK(&di->attach_work,
3564 ab8500_charger_usb_link_attach_work);
3565
3566 INIT_DELAYED_WORK(&di->usb_state_changed_work,
3567 ab8500_charger_usb_state_changed_work);
3568
3569 INIT_DELAYED_WORK(&di->vbus_drop_end_work,
3570 ab8500_charger_vbus_drop_end_work);
3571
3572 /* Init work for charger detection */
3573 INIT_WORK(&di->usb_link_status_work,
3574 ab8500_charger_usb_link_status_work);
3575 INIT_WORK(&di->ac_work, ab8500_charger_ac_work);
3576 INIT_WORK(&di->detect_usb_type_work,
3577 ab8500_charger_detect_usb_type_work);
3578
3579 /* Init work for checking HW status */
3580 INIT_WORK(&di->check_main_thermal_prot_work,
3581 ab8500_charger_check_main_thermal_prot_work);
3582 INIT_WORK(&di->check_usb_thermal_prot_work,
3583 ab8500_charger_check_usb_thermal_prot_work);
3584
3585
3586 /* Initialize OVV, and other registers */
3587 ret = ab8500_charger_init_hw_registers(di);
3588 if (ret) {
3589 dev_err(dev, "failed to initialize ABB registers\n");
3590 return ret;
3591 }
3592
3593 /* Register AC charger class */
3594 if (di->ac_chg.enabled) {
3595 di->ac_chg.psy = devm_power_supply_register(dev,
3596 &ab8500_ac_chg_desc,
3597 &ac_psy_cfg);
3598 if (IS_ERR(di->ac_chg.psy)) {
3599 dev_err(dev, "failed to register AC charger\n");
3600 return PTR_ERR(di->ac_chg.psy);
3601 }
3602 }
3603
3604 /* Register USB charger class */
3605 di->usb_chg.psy = devm_power_supply_register(dev,
3606 &ab8500_usb_chg_desc,
3607 &usb_psy_cfg);
3608 if (IS_ERR(di->usb_chg.psy)) {
3609 dev_err(dev, "failed to register USB charger\n");
3610 return PTR_ERR(di->usb_chg.psy);
3611 }
3612
3613 /* Identify the connected charger types during startup */
3614 charger_status = ab8500_charger_detect_chargers(di, true);
3615 if (charger_status & AC_PW_CONN) {
3616 di->ac.charger_connected = 1;
3617 di->ac_conn = true;
3618 ab8500_power_supply_changed(di, di->ac_chg.psy);
3619 sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
3620 }
3621
3622 platform_set_drvdata(pdev, di);
3623
3624 /* Create something that will match the subdrivers when we bind */
3625 for (i = 0; i < ARRAY_SIZE(ab8500_charger_component_drivers); i++) {
3626 struct device_driver *drv = &ab8500_charger_component_drivers[i]->driver;
3627 struct device *p = NULL, *d;
3628
3629 while ((d = platform_find_device_by_driver(p, drv))) {
3630 put_device(p);
3631 component_match_add(dev, &match,
3632 ab8500_charger_compare_dev, d);
3633 p = d;
3634 }
3635 put_device(p);
3636 }
3637 if (!match) {
3638 dev_err(dev, "no matching components\n");
3639 return -ENODEV;
3640 }
3641 if (IS_ERR(match)) {
3642 dev_err(dev, "could not create component match\n");
3643 return PTR_ERR(match);
3644 }
3645
3646 /* Notifier for external charger enabling */
3647 if (!di->ac_chg.enabled)
3648 blocking_notifier_chain_register(
3649 &charger_notifier_list, &charger_nb);
3650
3651
3652 di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
3653 if (IS_ERR_OR_NULL(di->usb_phy)) {
3654 dev_err(dev, "failed to get usb transceiver\n");
3655 ret = -EINVAL;
3656 goto out_charger_notifier;
3657 }
3658 di->nb.notifier_call = ab8500_charger_usb_notifier_call;
3659 ret = usb_register_notifier(di->usb_phy, &di->nb);
3660 if (ret) {
3661 dev_err(dev, "failed to register usb notifier\n");
3662 goto put_usb_phy;
3663 }
3664
3665
3666 ret = component_master_add_with_match(&pdev->dev,
3667 &ab8500_charger_comp_ops,
3668 match);
3669 if (ret) {
3670 dev_err(dev, "failed to add component master\n");
3671 goto free_notifier;
3672 }
3673
3674 return 0;
3675
3676 free_notifier:
3677 usb_unregister_notifier(di->usb_phy, &di->nb);
3678 put_usb_phy:
3679 usb_put_phy(di->usb_phy);
3680 out_charger_notifier:
3681 if (!di->ac_chg.enabled)
3682 blocking_notifier_chain_unregister(
3683 &charger_notifier_list, &charger_nb);
3684 return ret;
3685 }
3686
ab8500_charger_remove(struct platform_device * pdev)3687 static int ab8500_charger_remove(struct platform_device *pdev)
3688 {
3689 struct ab8500_charger *di = platform_get_drvdata(pdev);
3690
3691 component_master_del(&pdev->dev, &ab8500_charger_comp_ops);
3692
3693 usb_unregister_notifier(di->usb_phy, &di->nb);
3694 usb_put_phy(di->usb_phy);
3695 if (!di->ac_chg.enabled)
3696 blocking_notifier_chain_unregister(
3697 &charger_notifier_list, &charger_nb);
3698
3699 return 0;
3700 }
3701
3702 static SIMPLE_DEV_PM_OPS(ab8500_charger_pm_ops, ab8500_charger_suspend, ab8500_charger_resume);
3703
3704 static const struct of_device_id ab8500_charger_match[] = {
3705 { .compatible = "stericsson,ab8500-charger", },
3706 { },
3707 };
3708 MODULE_DEVICE_TABLE(of, ab8500_charger_match);
3709
3710 static struct platform_driver ab8500_charger_driver = {
3711 .probe = ab8500_charger_probe,
3712 .remove = ab8500_charger_remove,
3713 .driver = {
3714 .name = "ab8500-charger",
3715 .of_match_table = ab8500_charger_match,
3716 .pm = &ab8500_charger_pm_ops,
3717 },
3718 };
3719
ab8500_charger_init(void)3720 static int __init ab8500_charger_init(void)
3721 {
3722 int ret;
3723
3724 ret = platform_register_drivers(ab8500_charger_component_drivers,
3725 ARRAY_SIZE(ab8500_charger_component_drivers));
3726 if (ret)
3727 return ret;
3728
3729 return platform_driver_register(&ab8500_charger_driver);
3730 }
3731
ab8500_charger_exit(void)3732 static void __exit ab8500_charger_exit(void)
3733 {
3734 platform_unregister_drivers(ab8500_charger_component_drivers,
3735 ARRAY_SIZE(ab8500_charger_component_drivers));
3736 platform_driver_unregister(&ab8500_charger_driver);
3737 }
3738
3739 module_init(ab8500_charger_init);
3740 module_exit(ab8500_charger_exit);
3741
3742 MODULE_LICENSE("GPL v2");
3743 MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
3744 MODULE_ALIAS("platform:ab8500-charger");
3745 MODULE_DESCRIPTION("AB8500 charger management driver");
3746
