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ab8500_charger: Remove unused defines
[linux-2.6-block.git] / drivers / power / ab8500_charger.c
CommitLineData
84edbeea
AM		 1/*
2 * Copyright (C) ST-Ericsson SA 2012
3 *
4 * Charger driver for AB8500
5 *
6 * License Terms: GNU General Public License v2
7 * Author:
8 * Johan Palsson <johan.palsson@stericsson.com>
9 * Karl Komierowski <karl.komierowski@stericsson.com>
10 * Arun R Murthy <arun.murthy@stericsson.com>
11 */
12
13#include <linux/init.h>
14#include <linux/module.h>
15#include <linux/device.h>
16#include <linux/interrupt.h>
17#include <linux/delay.h>
18#include <linux/slab.h>
19#include <linux/platform_device.h>
20#include <linux/power_supply.h>
21#include <linux/completion.h>
22#include <linux/regulator/consumer.h>
23#include <linux/err.h>
24#include <linux/workqueue.h>
25#include <linux/kobject.h>
4aef72db
R		 26#include <linux/of.h>
27#include <linux/mfd/core.h>
84edbeea
AM		 28#include <linux/mfd/abx500/ab8500.h>
29#include <linux/mfd/abx500.h>
30#include <linux/mfd/abx500/ab8500-bm.h>
31#include <linux/mfd/abx500/ab8500-gpadc.h>
32#include <linux/mfd/abx500/ux500_chargalg.h>
33#include <linux/usb/otg.h>
b269fff4 34#include <linux/mutex.h>
84edbeea
AM		 35
36/* Charger constants */
37#define NO_PW_CONN 0
38#define AC_PW_CONN 1
39#define USB_PW_CONN 2
40
41#define MAIN_WDOG_ENA 0x01
42#define MAIN_WDOG_KICK 0x02
43#define MAIN_WDOG_DIS 0x00
44#define CHARG_WD_KICK 0x01
45#define MAIN_CH_ENA 0x01
46#define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02
47#define USB_CH_ENA 0x01
48#define USB_CHG_NO_OVERSHOOT_ENA_N 0x02
49#define MAIN_CH_DET 0x01
50#define MAIN_CH_CV_ON 0x04
51#define USB_CH_CV_ON 0x08
52#define VBUS_DET_DBNC100 0x02
53#define VBUS_DET_DBNC1 0x01
54#define OTP_ENABLE_WD 0x01
55
56#define MAIN_CH_INPUT_CURR_SHIFT 4
57#define VBUS_IN_CURR_LIM_SHIFT 4
58
59#define LED_INDICATOR_PWM_ENA 0x01
60#define LED_INDICATOR_PWM_DIS 0x00
61#define LED_IND_CUR_5MA 0x04
62#define LED_INDICATOR_PWM_DUTY_252_256 0xBF
63
64/* HW failure constants */
65#define MAIN_CH_TH_PROT 0x02
66#define VBUS_CH_NOK 0x08
67#define USB_CH_TH_PROT 0x02
68#define VBUS_OVV_TH 0x01
69#define MAIN_CH_NOK 0x01
70#define VBUS_DET 0x80
71
b269fff4
LJ		 72#define MAIN_CH_STATUS2_MAINCHGDROP 0x80
73#define MAIN_CH_STATUS2_MAINCHARGERDETDBNC 0x40
74#define USB_CH_VBUSDROP 0x40
75#define USB_CH_VBUSDETDBNC 0x01
76
84edbeea
AM		 77/* UsbLineStatus register bit masks */
78#define AB8500_USB_LINK_STATUS 0x78
79#define AB8500_STD_HOST_SUSP 0x18
80
81/* Watchdog timeout constant */
82#define WD_TIMER 0x30 /* 4min */
83#define WD_KICK_INTERVAL (60 * HZ)
84
85/* Lowest charger voltage is 3.39V -> 0x4E */
86#define LOW_VOLT_REG 0x4E
87
f8e96dff
JB		 88/* Step up/down delay in us */
89#define STEP_UDELAY 1000
90
b269fff4
LJ		 91#define CHARGER_STATUS_POLL 10 /* in ms */
92
84edbeea
AM		 93/* UsbLineStatus register - usb types */
94enum ab8500_charger_link_status {
95 USB_STAT_NOT_CONFIGURED,
96 USB_STAT_STD_HOST_NC,
97 USB_STAT_STD_HOST_C_NS,
98 USB_STAT_STD_HOST_C_S,
99 USB_STAT_HOST_CHG_NM,
100 USB_STAT_HOST_CHG_HS,
101 USB_STAT_HOST_CHG_HS_CHIRP,
102 USB_STAT_DEDICATED_CHG,
103 USB_STAT_ACA_RID_A,
104 USB_STAT_ACA_RID_B,
105 USB_STAT_ACA_RID_C_NM,
106 USB_STAT_ACA_RID_C_HS,
107 USB_STAT_ACA_RID_C_HS_CHIRP,
108 USB_STAT_HM_IDGND,
109 USB_STAT_RESERVED,
110 USB_STAT_NOT_VALID_LINK,
74a8e349
HB		 111 USB_STAT_PHY_EN,
112 USB_STAT_SUP_NO_IDGND_VBUS,
113 USB_STAT_SUP_IDGND_VBUS,
114 USB_STAT_CHARGER_LINE_1,
115 USB_STAT_CARKIT_1,
116 USB_STAT_CARKIT_2,
117 USB_STAT_ACA_DOCK_CHARGER,
84edbeea
AM		 118};
119
120enum ab8500_usb_state {
121 AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */
122 AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */
123 AB8500_BM_USB_STATE_CONFIGURED,
124 AB8500_BM_USB_STATE_SUSPEND,
125 AB8500_BM_USB_STATE_RESUME,
126 AB8500_BM_USB_STATE_MAX,
127};
128
129/* VBUS input current limits supported in AB8500 in mA */
130#define USB_CH_IP_CUR_LVL_0P05 50
131#define USB_CH_IP_CUR_LVL_0P09 98
132#define USB_CH_IP_CUR_LVL_0P19 193
133#define USB_CH_IP_CUR_LVL_0P29 290
134#define USB_CH_IP_CUR_LVL_0P38 380
135#define USB_CH_IP_CUR_LVL_0P45 450
136#define USB_CH_IP_CUR_LVL_0P5 500
137#define USB_CH_IP_CUR_LVL_0P6 600
138#define USB_CH_IP_CUR_LVL_0P7 700
139#define USB_CH_IP_CUR_LVL_0P8 800
140#define USB_CH_IP_CUR_LVL_0P9 900
141#define USB_CH_IP_CUR_LVL_1P0 1000
142#define USB_CH_IP_CUR_LVL_1P1 1100
143#define USB_CH_IP_CUR_LVL_1P3 1300
144#define USB_CH_IP_CUR_LVL_1P4 1400
145#define USB_CH_IP_CUR_LVL_1P5 1500
146
147#define VBAT_TRESH_IP_CUR_RED 3800
148
149#define to_ab8500_charger_usb_device_info(x) container_of((x), \
150 struct ab8500_charger, usb_chg)
151#define to_ab8500_charger_ac_device_info(x) container_of((x), \
152 struct ab8500_charger, ac_chg)
153
154/**
155 * struct ab8500_charger_interrupts - ab8500 interupts
156 * @name: name of the interrupt
157 * @isr function pointer to the isr
158 */
159struct ab8500_charger_interrupts {
160 char *name;
161 irqreturn_t (*isr)(int irq, void *data);
162};
163
164struct ab8500_charger_info {
165 int charger_connected;
166 int charger_online;
167 int charger_voltage;
168 int cv_active;
169 bool wd_expired;
a864c5a8 170 int charger_current;
84edbeea
AM		 171};
172
173struct ab8500_charger_event_flags {
174 bool mainextchnotok;
175 bool main_thermal_prot;
176 bool usb_thermal_prot;
177 bool vbus_ovv;
178 bool usbchargernotok;
179 bool chgwdexp;
180 bool vbus_collapse;
181};
182
183struct ab8500_charger_usb_state {
184 bool usb_changed;
185 int usb_current;
186 enum ab8500_usb_state state;
187 spinlock_t usb_lock;
188};
189
190/**
191 * struct ab8500_charger - ab8500 Charger device information
192 * @dev: Pointer to the structure device
193 * @max_usb_in_curr: Max USB charger input current
194 * @vbus_detected: VBUS detected
195 * @vbus_detected_start:
196 * VBUS detected during startup
197 * @ac_conn: This will be true when the AC charger has been plugged
198 * @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC
199 * charger is enabled
200 * @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB
201 * charger is enabled
202 * @vbat Battery voltage
203 * @old_vbat Previously measured battery voltage
204 * @autopower Indicate if we should have automatic pwron after pwrloss
4aef72db 205 * @autopower_cfg platform specific power config support for "pwron after pwrloss"
84edbeea
AM		 206 * @parent: Pointer to the struct ab8500
207 * @gpadc: Pointer to the struct gpadc
b0284de0 208 * @bm: Platform specific battery management information
84edbeea
AM		 209 * @flags: Structure for information about events triggered
210 * @usb_state: Structure for usb stack information
211 * @ac_chg: AC charger power supply
212 * @usb_chg: USB charger power supply
213 * @ac: Structure that holds the AC charger properties
214 * @usb: Structure that holds the USB charger properties
215 * @regu: Pointer to the struct regulator
216 * @charger_wq: Work queue for the IRQs and checking HW state
217 * @check_vbat_work Work for checking vbat threshold to adjust vbus current
218 * @check_hw_failure_work: Work for checking HW state
219 * @check_usbchgnotok_work: Work for checking USB charger not ok status
220 * @kick_wd_work: Work for kicking the charger watchdog in case
221 * of ABB rev 1.* due to the watchog logic bug
b269fff4
LJ		 222 * @ac_charger_attached_work: Work for checking if AC charger is still
223 * connected
224 * @usb_charger_attached_work: Work for checking if USB charger is still
225 * connected
84edbeea
AM		 226 * @ac_work: Work for checking AC charger connection
227 * @detect_usb_type_work: Work for detecting the USB type connected
228 * @usb_link_status_work: Work for checking the new USB link status
229 * @usb_state_changed_work: Work for checking USB state
230 * @check_main_thermal_prot_work:
231 * Work for checking Main thermal status
232 * @check_usb_thermal_prot_work:
233 * Work for checking USB thermal status
b269fff4 234 * @charger_attached_mutex: For controlling the wakelock
84edbeea
AM		 235 */
236struct ab8500_charger {
237 struct device *dev;
238 int max_usb_in_curr;
239 bool vbus_detected;
240 bool vbus_detected_start;
241 bool ac_conn;
242 bool vddadc_en_ac;
243 bool vddadc_en_usb;
244 int vbat;
245 int old_vbat;
246 bool autopower;
4aef72db 247 bool autopower_cfg;
84edbeea
AM		 248 struct ab8500 *parent;
249 struct ab8500_gpadc *gpadc;
b0284de0 250 struct abx500_bm_data *bm;
84edbeea
AM		 251 struct ab8500_charger_event_flags flags;
252 struct ab8500_charger_usb_state usb_state;
253 struct ux500_charger ac_chg;
254 struct ux500_charger usb_chg;
255 struct ab8500_charger_info ac;
256 struct ab8500_charger_info usb;
257 struct regulator *regu;
258 struct workqueue_struct *charger_wq;
259 struct delayed_work check_vbat_work;
260 struct delayed_work check_hw_failure_work;
261 struct delayed_work check_usbchgnotok_work;
262 struct delayed_work kick_wd_work;
b269fff4
LJ		 263 struct delayed_work ac_charger_attached_work;
264 struct delayed_work usb_charger_attached_work;
84edbeea
AM		 265 struct work_struct ac_work;
266 struct work_struct detect_usb_type_work;
267 struct work_struct usb_link_status_work;
268 struct work_struct usb_state_changed_work;
269 struct work_struct check_main_thermal_prot_work;
270 struct work_struct check_usb_thermal_prot_work;
efd71c89 271 struct usb_phy *usb_phy;
84edbeea 272 struct notifier_block nb;
b269fff4 273 struct mutex charger_attached_mutex;
84edbeea
AM		 274};
275
276/* AC properties */
277static enum power_supply_property ab8500_charger_ac_props[] = {
278 POWER_SUPPLY_PROP_HEALTH,
279 POWER_SUPPLY_PROP_PRESENT,
280 POWER_SUPPLY_PROP_ONLINE,
281 POWER_SUPPLY_PROP_VOLTAGE_NOW,
282 POWER_SUPPLY_PROP_VOLTAGE_AVG,
283 POWER_SUPPLY_PROP_CURRENT_NOW,
284};
285
286/* USB properties */
287static enum power_supply_property ab8500_charger_usb_props[] = {
288 POWER_SUPPLY_PROP_HEALTH,
289 POWER_SUPPLY_PROP_CURRENT_AVG,
290 POWER_SUPPLY_PROP_PRESENT,
291 POWER_SUPPLY_PROP_ONLINE,
292 POWER_SUPPLY_PROP_VOLTAGE_NOW,
293 POWER_SUPPLY_PROP_VOLTAGE_AVG,
294 POWER_SUPPLY_PROP_CURRENT_NOW,
295};
296
defbfa9c
POH		 297/*
298 * Function for enabling and disabling sw fallback mode
299 * should always be disabled when no charger is connected.
84edbeea 300 */
defbfa9c
POH		 301static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di,
302 bool fallback)
84edbeea
AM		 303{
304 u8 reg;
305 int ret;
306
defbfa9c 307 dev_dbg(di->dev, "SW Fallback: %d\n", fallback);
84edbeea 308
defbfa9c 309 /* read the register containing fallback bit */
84edbeea
AM		 310 ret = abx500_get_register_interruptible(di->dev, 0x15, 0x00, &reg);
311 if (ret) {
312 dev_err(di->dev, "%d write failed\n", __LINE__);
313 return;
314 }
315
316 /* enable the OPT emulation registers */
317 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
318 if (ret) {
319 dev_err(di->dev, "%d write failed\n", __LINE__);
320 return;
321 }
322
defbfa9c 323 if (fallback)
84edbeea
AM		 324 reg |= 0x8;
325 else
326 reg &= ~0x8;
327
defbfa9c 328 /* write back the changed fallback bit value to register */
84edbeea
AM		 329 ret = abx500_set_register_interruptible(di->dev, 0x15, 0x00, reg);
330 if (ret) {
331 dev_err(di->dev, "%d write failed\n", __LINE__);
332 return;
333 }
334
335 /* disable the set OTP registers again */
336 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
337 if (ret) {
338 dev_err(di->dev, "%d write failed\n", __LINE__);
339 return;
340 }
341}
342
343/**
344 * ab8500_power_supply_changed - a wrapper with local extentions for
345 * power_supply_changed
346 * @di: pointer to the ab8500_charger structure
347 * @psy: pointer to power_supply_that have changed.
348 *
349 */
350static void ab8500_power_supply_changed(struct ab8500_charger *di,
351 struct power_supply *psy)
352{
4aef72db 353 if (di->autopower_cfg) {
84edbeea
AM		 354 if (!di->usb.charger_connected &&
355 !di->ac.charger_connected &&
356 di->autopower) {
357 di->autopower = false;
defbfa9c 358 ab8500_enable_disable_sw_fallback(di, false);
84edbeea
AM		 359 } else if (!di->autopower &&
360 (di->ac.charger_connected ||
361 di->usb.charger_connected)) {
362 di->autopower = true;
defbfa9c 363 ab8500_enable_disable_sw_fallback(di, true);
84edbeea
AM		 364 }
365 }
366 power_supply_changed(psy);
367}
368
369static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
370 bool connected)
371{
372 if (connected != di->usb.charger_connected) {
373 dev_dbg(di->dev, "USB connected:%i\n", connected);
374 di->usb.charger_connected = connected;
375 sysfs_notify(&di->usb_chg.psy.dev->kobj, NULL, "present");
b269fff4
LJ		 376
377 if (connected) {
378 mutex_lock(&di->charger_attached_mutex);
379 mutex_unlock(&di->charger_attached_mutex);
380
381 queue_delayed_work(di->charger_wq,
382 &di->usb_charger_attached_work,
383 HZ);
384 } else {
385 cancel_delayed_work_sync(&di->usb_charger_attached_work);
386 mutex_lock(&di->charger_attached_mutex);
387 mutex_unlock(&di->charger_attached_mutex);
388 }
84edbeea
AM		 389 }
390}
391
392/**
393 * ab8500_charger_get_ac_voltage() - get ac charger voltage
394 * @di: pointer to the ab8500_charger structure
395 *
396 * Returns ac charger voltage (on success)
397 */
398static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
399{
400 int vch;
401
402 /* Only measure voltage if the charger is connected */
403 if (di->ac.charger_connected) {
404 vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V);
405 if (vch < 0)
406 dev_err(di->dev, "%s gpadc conv failed,\n", __func__);
407 } else {
408 vch = 0;
409 }
410 return vch;
411}
412
413/**
414 * ab8500_charger_ac_cv() - check if the main charger is in CV mode
415 * @di: pointer to the ab8500_charger structure
416 *
417 * Returns ac charger CV mode (on success) else error code
418 */
419static int ab8500_charger_ac_cv(struct ab8500_charger *di)
420{
421 u8 val;
422 int ret = 0;
423
424 /* Only check CV mode if the charger is online */
425 if (di->ac.charger_online) {
426 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
427 AB8500_CH_STATUS1_REG, &val);
428 if (ret < 0) {
429 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
430 return 0;
431 }
432
433 if (val & MAIN_CH_CV_ON)
434 ret = 1;
435 else
436 ret = 0;
437 }
438
439 return ret;
440}
441
442/**
443 * ab8500_charger_get_vbus_voltage() - get vbus voltage
444 * @di: pointer to the ab8500_charger structure
445 *
446 * This function returns the vbus voltage.
447 * Returns vbus voltage (on success)
448 */
449static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
450{
451 int vch;
452
453 /* Only measure voltage if the charger is connected */
454 if (di->usb.charger_connected) {
455 vch = ab8500_gpadc_convert(di->gpadc, VBUS_V);
456 if (vch < 0)
457 dev_err(di->dev, "%s gpadc conv failed\n", __func__);
458 } else {
459 vch = 0;
460 }
461 return vch;
462}
463
464/**
465 * ab8500_charger_get_usb_current() - get usb charger current
466 * @di: pointer to the ab8500_charger structure
467 *
468 * This function returns the usb charger current.
469 * Returns usb current (on success) and error code on failure
470 */
471static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
472{
473 int ich;
474
475 /* Only measure current if the charger is online */
476 if (di->usb.charger_online) {
477 ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C);
478 if (ich < 0)
479 dev_err(di->dev, "%s gpadc conv failed\n", __func__);
480 } else {
481 ich = 0;
482 }
483 return ich;
484}
485
486/**
487 * ab8500_charger_get_ac_current() - get ac charger current
488 * @di: pointer to the ab8500_charger structure
489 *
490 * This function returns the ac charger current.
491 * Returns ac current (on success) and error code on failure.
492 */
493static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
494{
495 int ich;
496
497 /* Only measure current if the charger is online */
498 if (di->ac.charger_online) {
499 ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C);
500 if (ich < 0)
501 dev_err(di->dev, "%s gpadc conv failed\n", __func__);
502 } else {
503 ich = 0;
504 }
505 return ich;
506}
507
508/**
509 * ab8500_charger_usb_cv() - check if the usb charger is in CV mode
510 * @di: pointer to the ab8500_charger structure
511 *
512 * Returns ac charger CV mode (on success) else error code
513 */
514static int ab8500_charger_usb_cv(struct ab8500_charger *di)
515{
516 int ret;
517 u8 val;
518
519 /* Only check CV mode if the charger is online */
520 if (di->usb.charger_online) {
521 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
522 AB8500_CH_USBCH_STAT1_REG, &val);
523 if (ret < 0) {
524 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
525 return 0;
526 }
527
528 if (val & USB_CH_CV_ON)
529 ret = 1;
530 else
531 ret = 0;
532 } else {
533 ret = 0;
534 }
535
536 return ret;
537}
538
539/**
540 * ab8500_charger_detect_chargers() - Detect the connected chargers
541 * @di: pointer to the ab8500_charger structure
542 *
543 * Returns the type of charger connected.
544 * For USB it will not mean we can actually charge from it
545 * but that there is a USB cable connected that we have to
546 * identify. This is used during startup when we don't get
547 * interrupts of the charger detection
548 *
549 * Returns an integer value, that means,
550 * NO_PW_CONN no power supply is connected
551 * AC_PW_CONN if the AC power supply is connected
552 * USB_PW_CONN if the USB power supply is connected
553 * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected
554 */
555static int ab8500_charger_detect_chargers(struct ab8500_charger *di)
556{
557 int result = NO_PW_CONN;
558 int ret;
559 u8 val;
560
561 /* Check for AC charger */
562 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
563 AB8500_CH_STATUS1_REG, &val);
564 if (ret < 0) {
565 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
566 return ret;
567 }
568
569 if (val & MAIN_CH_DET)
570 result = AC_PW_CONN;
571
572 /* Check for USB charger */
573 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
574 AB8500_CH_USBCH_STAT1_REG, &val);
575 if (ret < 0) {
576 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
577 return ret;
578 }
579
580 if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100))
581 result |= USB_PW_CONN;
582
583 return result;
584}
585
586/**
587 * ab8500_charger_max_usb_curr() - get the max curr for the USB type
588 * @di: pointer to the ab8500_charger structure
589 * @link_status: the identified USB type
590 *
591 * Get the maximum current that is allowed to be drawn from the host
592 * based on the USB type.
593 * Returns error code in case of failure else 0 on success
594 */
595static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
74a8e349 596 enum ab8500_charger_link_status link_status)
84edbeea
AM		 597{
598 int ret = 0;
599
600 switch (link_status) {
601 case USB_STAT_STD_HOST_NC:
602 case USB_STAT_STD_HOST_C_NS:
603 case USB_STAT_STD_HOST_C_S:
604 dev_dbg(di->dev, "USB Type - Standard host is "
74a8e349 605 "detected through USB driver\n");
84edbeea
AM		 606 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P09;
607 break;
608 case USB_STAT_HOST_CHG_HS_CHIRP:
609 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
74a8e349
HB		 610 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
611 di->max_usb_in_curr);
84edbeea
AM		 612 break;
613 case USB_STAT_HOST_CHG_HS:
614 case USB_STAT_ACA_RID_C_HS:
615 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P9;
74a8e349
HB		 616 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
617 di->max_usb_in_curr);
84edbeea
AM		 618 break;
619 case USB_STAT_ACA_RID_A:
620 /*
621 * Dedicated charger level minus maximum current accessory
622 * can consume (300mA). Closest level is 1100mA
623 */
624 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P1;
74a8e349
HB		 625 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
626 di->max_usb_in_curr);
84edbeea
AM		 627 break;
628 case USB_STAT_ACA_RID_B:
629 /*
630 * Dedicated charger level minus 120mA (20mA for ACA and
631 * 100mA for potential accessory). Closest level is 1300mA
632 */
633 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P3;
74a8e349
HB		 634 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
635 di->max_usb_in_curr);
84edbeea 636 break;
84edbeea 637 case USB_STAT_HOST_CHG_NM:
74a8e349 638 case USB_STAT_DEDICATED_CHG:
84edbeea 639 case USB_STAT_ACA_RID_C_NM:
74a8e349 640 case USB_STAT_ACA_RID_C_HS_CHIRP:
84edbeea 641 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5;
74a8e349
HB		 642 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
643 di->max_usb_in_curr);
84edbeea
AM		 644 break;
645 case USB_STAT_HM_IDGND:
84edbeea 646 case USB_STAT_NOT_VALID_LINK:
74a8e349 647 case USB_STAT_NOT_CONFIGURED:
84edbeea
AM		 648 dev_err(di->dev, "USB Type - Charging not allowed\n");
649 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
650 ret = -ENXIO;
651 break;
74a8e349
HB		 652 case USB_STAT_RESERVED:
653 if (is_ab8500(di->parent)) {
654 di->flags.vbus_collapse = true;
655 dev_err(di->dev, "USB Type - USB_STAT_RESERVED "
656 "VBUS has collapsed\n");
657 ret = -ENXIO;
658 break;
659 }
660 if (is_ab9540(di->parent) || is_ab8505(di->parent)) {
661 dev_dbg(di->dev, "USB Type - Charging not allowed\n");
662 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
663 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
664 link_status, di->max_usb_in_curr);
665 ret = -ENXIO;
666 break;
667 }
668 break;
669 case USB_STAT_CARKIT_1:
670 case USB_STAT_CARKIT_2:
671 case USB_STAT_ACA_DOCK_CHARGER:
672 case USB_STAT_CHARGER_LINE_1:
673 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
674 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
675 di->max_usb_in_curr);
676 break;
677
84edbeea
AM		 678 default:
679 dev_err(di->dev, "USB Type - Unknown\n");
680 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
681 ret = -ENXIO;
682 break;
683 };
684
685 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
686 link_status, di->max_usb_in_curr);
687
688 return ret;
689}
690
691/**
692 * ab8500_charger_read_usb_type() - read the type of usb connected
693 * @di: pointer to the ab8500_charger structure
694 *
695 * Detect the type of the plugged USB
696 * Returns error code in case of failure else 0 on success
697 */
698static int ab8500_charger_read_usb_type(struct ab8500_charger *di)
699{
700 int ret;
701 u8 val;
702
703 ret = abx500_get_register_interruptible(di->dev,
704 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val);
705 if (ret < 0) {
706 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
707 return ret;
708 }
74a8e349
HB		 709 if (is_ab8500(di->parent)) {
710 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
711 AB8500_USB_LINE_STAT_REG, &val);
712 } else {
713 if (is_ab9540(di->parent) || is_ab8505(di->parent))
714 ret = abx500_get_register_interruptible(di->dev,
715 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
716 }
84edbeea
AM		 717 if (ret < 0) {
718 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
719 return ret;
720 }
721
722 /* get the USB type */
723 val = (val & AB8500_USB_LINK_STATUS) >> 3;
724 ret = ab8500_charger_max_usb_curr(di,
725 (enum ab8500_charger_link_status) val);
726
727 return ret;
728}
729
730/**
731 * ab8500_charger_detect_usb_type() - get the type of usb connected
732 * @di: pointer to the ab8500_charger structure
733 *
734 * Detect the type of the plugged USB
735 * Returns error code in case of failure else 0 on success
736 */
737static int ab8500_charger_detect_usb_type(struct ab8500_charger *di)
738{
739 int i, ret;
740 u8 val;
741
742 /*
743 * On getting the VBUS rising edge detect interrupt there
744 * is a 250ms delay after which the register UsbLineStatus
745 * is filled with valid data.
746 */
747 for (i = 0; i < 10; i++) {
748 msleep(250);
749 ret = abx500_get_register_interruptible(di->dev,
750 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG,
751 &val);
752 if (ret < 0) {
753 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
754 return ret;
755 }
74a8e349
HB		 756
757 if (is_ab8500(di->parent))
758 ret = abx500_get_register_interruptible(di->dev,
759 AB8500_USB, AB8500_USB_LINE_STAT_REG, &val);
760 else
761 ret = abx500_get_register_interruptible(di->dev,
762 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
84edbeea
AM		 763 if (ret < 0) {
764 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
765 return ret;
766 }
767 /*
768 * Until the IT source register is read the UsbLineStatus
769 * register is not updated, hence doing the same
770 * Revisit this:
771 */
772
773 /* get the USB type */
774 val = (val & AB8500_USB_LINK_STATUS) >> 3;
775 if (val)
776 break;
777 }
778 ret = ab8500_charger_max_usb_curr(di,
779 (enum ab8500_charger_link_status) val);
780
781 return ret;
782}
783
784/*
785 * This array maps the raw hex value to charger voltage used by the AB8500
786 * Values taken from the UM0836
787 */
788static int ab8500_charger_voltage_map[] = {
789 3500 ,
790 3525 ,
791 3550 ,
792 3575 ,
793 3600 ,
794 3625 ,
795 3650 ,
796 3675 ,
797 3700 ,
798 3725 ,
799 3750 ,
800 3775 ,
801 3800 ,
802 3825 ,
803 3850 ,
804 3875 ,
805 3900 ,
806 3925 ,
807 3950 ,
808 3975 ,
809 4000 ,
810 4025 ,
811 4050 ,
812 4060 ,
813 4070 ,
814 4080 ,
815 4090 ,
816 4100 ,
817 4110 ,
818 4120 ,
819 4130 ,
820 4140 ,
821 4150 ,
822 4160 ,
823 4170 ,
824 4180 ,
825 4190 ,
826 4200 ,
827 4210 ,
828 4220 ,
829 4230 ,
830 4240 ,
831 4250 ,
832 4260 ,
833 4270 ,
834 4280 ,
835 4290 ,
836 4300 ,
837 4310 ,
838 4320 ,
839 4330 ,
840 4340 ,
841 4350 ,
842 4360 ,
843 4370 ,
844 4380 ,
845 4390 ,
846 4400 ,
847 4410 ,
848 4420 ,
849 4430 ,
850 4440 ,
851 4450 ,
852 4460 ,
853 4470 ,
854 4480 ,
855 4490 ,
856 4500 ,
857 4510 ,
858 4520 ,
859 4530 ,
860 4540 ,
861 4550 ,
862 4560 ,
863 4570 ,
864 4580 ,
865 4590 ,
866 4600 ,
867};
868
869/*
870 * This array maps the raw hex value to charger current used by the AB8500
871 * Values taken from the UM0836
872 */
873static int ab8500_charger_current_map[] = {
874 100 ,
875 200 ,
876 300 ,
877 400 ,
878 500 ,
879 600 ,
880 700 ,
881 800 ,
882 900 ,
883 1000 ,
884 1100 ,
885 1200 ,
886 1300 ,
887 1400 ,
888 1500 ,
889};
890
891/*
892 * This array maps the raw hex value to VBUS input current used by the AB8500
893 * Values taken from the UM0836
894 */
895static int ab8500_charger_vbus_in_curr_map[] = {
896 USB_CH_IP_CUR_LVL_0P05,
897 USB_CH_IP_CUR_LVL_0P09,
898 USB_CH_IP_CUR_LVL_0P19,
899 USB_CH_IP_CUR_LVL_0P29,
900 USB_CH_IP_CUR_LVL_0P38,
901 USB_CH_IP_CUR_LVL_0P45,
902 USB_CH_IP_CUR_LVL_0P5,
903 USB_CH_IP_CUR_LVL_0P6,
904 USB_CH_IP_CUR_LVL_0P7,
905 USB_CH_IP_CUR_LVL_0P8,
906 USB_CH_IP_CUR_LVL_0P9,
907 USB_CH_IP_CUR_LVL_1P0,
908 USB_CH_IP_CUR_LVL_1P1,
909 USB_CH_IP_CUR_LVL_1P3,
910 USB_CH_IP_CUR_LVL_1P4,
911 USB_CH_IP_CUR_LVL_1P5,
912};
913
914static int ab8500_voltage_to_regval(int voltage)
915{
916 int i;
917
918 /* Special case for voltage below 3.5V */
919 if (voltage < ab8500_charger_voltage_map[0])
920 return LOW_VOLT_REG;
921
922 for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) {
923 if (voltage < ab8500_charger_voltage_map[i])
924 return i - 1;
925 }
926
927 /* If not last element, return error */
928 i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1;
929 if (voltage == ab8500_charger_voltage_map[i])
930 return i;
931 else
932 return -1;
933}
934
935static int ab8500_current_to_regval(int curr)
936{
937 int i;
938
939 if (curr < ab8500_charger_current_map[0])
940 return 0;
941
942 for (i = 0; i < ARRAY_SIZE(ab8500_charger_current_map); i++) {
943 if (curr < ab8500_charger_current_map[i])
944 return i - 1;
945 }
946
947 /* If not last element, return error */
948 i = ARRAY_SIZE(ab8500_charger_current_map) - 1;
949 if (curr == ab8500_charger_current_map[i])
950 return i;
951 else
952 return -1;
953}
954
955static int ab8500_vbus_in_curr_to_regval(int curr)
956{
957 int i;
958
959 if (curr < ab8500_charger_vbus_in_curr_map[0])
960 return 0;
961
962 for (i = 0; i < ARRAY_SIZE(ab8500_charger_vbus_in_curr_map); i++) {
963 if (curr < ab8500_charger_vbus_in_curr_map[i])
964 return i - 1;
965 }
966
967 /* If not last element, return error */
968 i = ARRAY_SIZE(ab8500_charger_vbus_in_curr_map) - 1;
969 if (curr == ab8500_charger_vbus_in_curr_map[i])
970 return i;
971 else
972 return -1;
973}
974
975/**
976 * ab8500_charger_get_usb_cur() - get usb current
977 * @di: pointer to the ab8500_charger structre
978 *
979 * The usb stack provides the maximum current that can be drawn from
980 * the standard usb host. This will be in mA.
981 * This function converts current in mA to a value that can be written
982 * to the register. Returns -1 if charging is not allowed
983 */
984static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
985{
986 switch (di->usb_state.usb_current) {
987 case 100:
988 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P09;
989 break;
990 case 200:
991 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P19;
992 break;
993 case 300:
994 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P29;
995 break;
996 case 400:
997 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P38;
998 break;
999 case 500:
1000 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
1001 break;
1002 default:
1003 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
1004 return -1;
1005 break;
1006 };
1007 return 0;
1008}
1009
f8e96dff
JB		 1010/**
1011 * ab8500_charger_set_current() - set charger current
1012 * @di: pointer to the ab8500_charger structure
1013 * @ich: charger current, in mA
1014 * @reg: select what charger register to set
1015 *
1016 * Set charger current.
1017 * There is no state machine in the AB to step up/down the charger
1018 * current to avoid dips and spikes on MAIN, VBUS and VBAT when
1019 * charging is started. Instead we need to implement
1020 * this charger current step-up/down here.
1021 * Returns error code in case of failure else 0(on success)
1022 */
1023static int ab8500_charger_set_current(struct ab8500_charger *di,
1024 int ich, int reg)
1025{
1026 int ret, i;
1027 int curr_index, prev_curr_index, shift_value;
1028 u8 reg_value;
1029
1030 switch (reg) {
1031 case AB8500_MCH_IPT_CURLVL_REG:
1032 shift_value = MAIN_CH_INPUT_CURR_SHIFT;
1033 curr_index = ab8500_current_to_regval(ich);
1034 break;
1035 case AB8500_USBCH_IPT_CRNTLVL_REG:
1036 shift_value = VBUS_IN_CURR_LIM_SHIFT;
1037 curr_index = ab8500_vbus_in_curr_to_regval(ich);
1038 break;
1039 case AB8500_CH_OPT_CRNTLVL_REG:
1040 shift_value = 0;
1041 curr_index = ab8500_current_to_regval(ich);
1042 break;
1043 default:
1044 dev_err(di->dev, "%s current register not valid\n", __func__);
1045 return -ENXIO;
1046 }
1047
1048 if (curr_index < 0) {
1049 dev_err(di->dev, "requested current limit out-of-range\n");
1050 return -ENXIO;
1051 }
1052
1053 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1054 reg, &reg_value);
1055 if (ret < 0) {
1056 dev_err(di->dev, "%s read failed\n", __func__);
1057 return ret;
1058 }
1059 prev_curr_index = (reg_value >> shift_value);
1060
1061 /* only update current if it's been changed */
1062 if (prev_curr_index == curr_index)
1063 return 0;
1064
1065 dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n",
1066 __func__, ich, reg);
1067
1068 if (prev_curr_index > curr_index) {
1069 for (i = prev_curr_index - 1; i >= curr_index; i--) {
1070 ret = abx500_set_register_interruptible(di->dev,
1071 AB8500_CHARGER, reg, (u8) i << shift_value);
1072 if (ret) {
1073 dev_err(di->dev, "%s write failed\n", __func__);
1074 return ret;
1075 }
1076 usleep_range(STEP_UDELAY, STEP_UDELAY * 2);
1077 }
1078 } else {
1079 for (i = prev_curr_index + 1; i <= curr_index; i++) {
1080 ret = abx500_set_register_interruptible(di->dev,
1081 AB8500_CHARGER, reg, (u8) i << shift_value);
1082 if (ret) {
1083 dev_err(di->dev, "%s write failed\n", __func__);
1084 return ret;
1085 }
1086 usleep_range(STEP_UDELAY, STEP_UDELAY * 2);
1087 }
1088 }
1089 return ret;
1090}
1091
84edbeea
AM		 1092/**
1093 * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
1094 * @di: pointer to the ab8500_charger structure
1095 * @ich_in: charger input current limit
1096 *
1097 * Sets the current that can be drawn from the USB host
1098 * Returns error code in case of failure else 0(on success)
1099 */
1100static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
1101 int ich_in)
1102{
84edbeea
AM		 1103 int min_value;
1104
1105 /* We should always use to lowest current limit */
b0284de0 1106 min_value = min(di->bm->chg_params->usb_curr_max, ich_in);
84edbeea
AM		 1107
1108 switch (min_value) {
1109 case 100:
1110 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1111 min_value = USB_CH_IP_CUR_LVL_0P05;
1112 break;
1113 case 500:
1114 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1115 min_value = USB_CH_IP_CUR_LVL_0P45;
1116 break;
1117 default:
1118 break;
1119 }
1120
f8e96dff
JB		 1121 return ab8500_charger_set_current(di, min_value,
1122 AB8500_USBCH_IPT_CRNTLVL_REG);
1123}
84edbeea 1124
f8e96dff
JB		 1125/**
1126 * ab8500_charger_set_main_in_curr() - set main charger input current
1127 * @di: pointer to the ab8500_charger structure
1128 * @ich_in: input charger current, in mA
1129 *
1130 * Set main charger input current.
1131 * Returns error code in case of failure else 0(on success)
1132 */
1133static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di,
1134 int ich_in)
1135{
1136 return ab8500_charger_set_current(di, ich_in,
1137 AB8500_MCH_IPT_CURLVL_REG);
1138}
84edbeea 1139
f8e96dff
JB		 1140/**
1141 * ab8500_charger_set_output_curr() - set charger output current
1142 * @di: pointer to the ab8500_charger structure
1143 * @ich_out: output charger current, in mA
1144 *
1145 * Set charger output current.
1146 * Returns error code in case of failure else 0(on success)
1147 */
1148static int ab8500_charger_set_output_curr(struct ab8500_charger *di,
1149 int ich_out)
1150{
1151 return ab8500_charger_set_current(di, ich_out,
1152 AB8500_CH_OPT_CRNTLVL_REG);
84edbeea
AM		 1153}
1154
1155/**
1156 * ab8500_charger_led_en() - turn on/off chargign led
1157 * @di: pointer to the ab8500_charger structure
1158 * @on: flag to turn on/off the chargign led
1159 *
1160 * Power ON/OFF charging LED indication
1161 * Returns error code in case of failure else 0(on success)
1162 */
1163static int ab8500_charger_led_en(struct ab8500_charger *di, int on)
1164{
1165 int ret;
1166
1167 if (on) {
1168 /* Power ON charging LED indicator, set LED current to 5mA */
1169 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1170 AB8500_LED_INDICATOR_PWM_CTRL,
1171 (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA));
1172 if (ret) {
1173 dev_err(di->dev, "Power ON LED failed\n");
1174 return ret;
1175 }
1176 /* LED indicator PWM duty cycle 252/256 */
1177 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1178 AB8500_LED_INDICATOR_PWM_DUTY,
1179 LED_INDICATOR_PWM_DUTY_252_256);
1180 if (ret) {
1181 dev_err(di->dev, "Set LED PWM duty cycle failed\n");
1182 return ret;
1183 }
1184 } else {
1185 /* Power off charging LED indicator */
1186 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1187 AB8500_LED_INDICATOR_PWM_CTRL,
1188 LED_INDICATOR_PWM_DIS);
1189 if (ret) {
1190 dev_err(di->dev, "Power-off LED failed\n");
1191 return ret;
1192 }
1193 }
1194
1195 return ret;
1196}
1197
1198/**
1199 * ab8500_charger_ac_en() - enable or disable ac charging
1200 * @di: pointer to the ab8500_charger structure
1201 * @enable: enable/disable flag
1202 * @vset: charging voltage
1203 * @iset: charging current
1204 *
1205 * Enable/Disable AC/Mains charging and turns on/off the charging led
1206 * respectively.
1207 **/
1208static int ab8500_charger_ac_en(struct ux500_charger *charger,
1209 int enable, int vset, int iset)
1210{
1211 int ret;
1212 int volt_index;
1213 int curr_index;
1214 int input_curr_index;
1215 u8 overshoot = 0;
1216
1217 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1218
1219 if (enable) {
1220 /* Check if AC is connected */
1221 if (!di->ac.charger_connected) {
1222 dev_err(di->dev, "AC charger not connected\n");
1223 return -ENXIO;
1224 }
1225
1226 /* Enable AC charging */
1227 dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset);
1228
1229 /*
1230 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1231 * will be triggered everytime we enable the VDD ADC supply.
1232 * This will turn off charging for a short while.
1233 * It can be avoided by having the supply on when
1234 * there is a charger enabled. Normally the VDD ADC supply
1235 * is enabled everytime a GPADC conversion is triggered. We will
1236 * force it to be enabled from this driver to have
1237 * the GPADC module independant of the AB8500 chargers
1238 */
1239 if (!di->vddadc_en_ac) {
1240 regulator_enable(di->regu);
1241 di->vddadc_en_ac = true;
1242 }
1243
1244 /* Check if the requested voltage or current is valid */
1245 volt_index = ab8500_voltage_to_regval(vset);
1246 curr_index = ab8500_current_to_regval(iset);
1247 input_curr_index = ab8500_current_to_regval(
b0284de0 1248 di->bm->chg_params->ac_curr_max);
84edbeea
AM		 1249 if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
1250 dev_err(di->dev,
1251 "Charger voltage or current too high, "
1252 "charging not started\n");
1253 return -ENXIO;
1254 }
1255
1256 /* ChVoltLevel: maximum battery charging voltage */
1257 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1258 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1259 if (ret) {
1260 dev_err(di->dev, "%s write failed\n", __func__);
1261 return ret;
1262 }
1263 /* MainChInputCurr: current that can be drawn from the charger*/
f8e96dff 1264 ret = ab8500_charger_set_main_in_curr(di,
b0284de0 1265 di->bm->chg_params->ac_curr_max);
84edbeea 1266 if (ret) {
f8e96dff
JB		 1267 dev_err(di->dev, "%s Failed to set MainChInputCurr\n",
1268 __func__);
84edbeea
AM		 1269 return ret;
1270 }
1271 /* ChOutputCurentLevel: protected output current */
f8e96dff 1272 ret = ab8500_charger_set_output_curr(di, iset);
84edbeea 1273 if (ret) {
f8e96dff
JB		 1274 dev_err(di->dev, "%s "
1275 "Failed to set ChOutputCurentLevel\n",
1276 __func__);
84edbeea
AM		 1277 return ret;
1278 }
1279
1280 /* Check if VBAT overshoot control should be enabled */
b0284de0 1281 if (!di->bm->enable_overshoot)
84edbeea
AM		 1282 overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;
1283
1284 /* Enable Main Charger */
1285 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1286 AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot);
1287 if (ret) {
1288 dev_err(di->dev, "%s write failed\n", __func__);
1289 return ret;
1290 }
1291
1292 /* Power on charging LED indication */
1293 ret = ab8500_charger_led_en(di, true);
1294 if (ret < 0)
1295 dev_err(di->dev, "failed to enable LED\n");
1296
1297 di->ac.charger_online = 1;
1298 } else {
1299 /* Disable AC charging */
1300 if (is_ab8500_1p1_or_earlier(di->parent)) {
1301 /*
1302 * For ABB revision 1.0 and 1.1 there is a bug in the
1303 * watchdog logic. That means we have to continously
1304 * kick the charger watchdog even when no charger is
1305 * connected. This is only valid once the AC charger
1306 * has been enabled. This is a bug that is not handled
1307 * by the algorithm and the watchdog have to be kicked
1308 * by the charger driver when the AC charger
1309 * is disabled
1310 */
1311 if (di->ac_conn) {
1312 queue_delayed_work(di->charger_wq,
1313 &di->kick_wd_work,
1314 round_jiffies(WD_KICK_INTERVAL));
1315 }
1316
1317 /*
1318 * We can't turn off charging completely
1319 * due to a bug in AB8500 cut1.
1320 * If we do, charging will not start again.
1321 * That is why we set the lowest voltage
1322 * and current possible
1323 */
1324 ret = abx500_set_register_interruptible(di->dev,
1325 AB8500_CHARGER,
1326 AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5);
1327 if (ret) {
1328 dev_err(di->dev,
1329 "%s write failed\n", __func__);
1330 return ret;
1331 }
1332
f8e96dff 1333 ret = ab8500_charger_set_output_curr(di, 0);
84edbeea 1334 if (ret) {
f8e96dff
JB		 1335 dev_err(di->dev, "%s "
1336 "Failed to set ChOutputCurentLevel\n",
1337 __func__);
84edbeea
AM		 1338 return ret;
1339 }
1340 } else {
1341 ret = abx500_set_register_interruptible(di->dev,
1342 AB8500_CHARGER,
1343 AB8500_MCH_CTRL1, 0);
1344 if (ret) {
1345 dev_err(di->dev,
1346 "%s write failed\n", __func__);
1347 return ret;
1348 }
1349 }
1350
1351 ret = ab8500_charger_led_en(di, false);
1352 if (ret < 0)
1353 dev_err(di->dev, "failed to disable LED\n");
1354
1355 di->ac.charger_online = 0;
1356 di->ac.wd_expired = false;
1357
1358 /* Disable regulator if enabled */
1359 if (di->vddadc_en_ac) {
1360 regulator_disable(di->regu);
1361 di->vddadc_en_ac = false;
1362 }
1363
1364 dev_dbg(di->dev, "%s Disabled AC charging\n", __func__);
1365 }
1366 ab8500_power_supply_changed(di, &di->ac_chg.psy);
1367
1368 return ret;
1369}
1370
1371/**
1372 * ab8500_charger_usb_en() - enable usb charging
1373 * @di: pointer to the ab8500_charger structure
1374 * @enable: enable/disable flag
1375 * @vset: charging voltage
1376 * @ich_out: charger output current
1377 *
1378 * Enable/Disable USB charging and turns on/off the charging led respectively.
1379 * Returns error code in case of failure else 0(on success)
1380 */
1381static int ab8500_charger_usb_en(struct ux500_charger *charger,
1382 int enable, int vset, int ich_out)
1383{
1384 int ret;
1385 int volt_index;
1386 int curr_index;
1387 u8 overshoot = 0;
1388
1389 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1390
1391 if (enable) {
1392 /* Check if USB is connected */
1393 if (!di->usb.charger_connected) {
1394 dev_err(di->dev, "USB charger not connected\n");
1395 return -ENXIO;
1396 }
1397
1398 /*
1399 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1400 * will be triggered everytime 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 everytime a GPADC conversion is triggered. We will
1405 * force it to be enabled from this driver to have
1406 * the GPADC module independant of the AB8500 chargers
1407 */
1408 if (!di->vddadc_en_usb) {
1409 regulator_enable(di->regu);
1410 di->vddadc_en_usb = true;
1411 }
1412
1413 /* Enable USB charging */
1414 dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out);
1415
1416 /* Check if the requested voltage or current is valid */
1417 volt_index = ab8500_voltage_to_regval(vset);
1418 curr_index = ab8500_current_to_regval(ich_out);
1419 if (volt_index < 0 || curr_index < 0) {
1420 dev_err(di->dev,
1421 "Charger voltage or current too high, "
1422 "charging not started\n");
1423 return -ENXIO;
1424 }
1425
1426 /* ChVoltLevel: max voltage upto which battery can be charged */
1427 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1428 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1429 if (ret) {
1430 dev_err(di->dev, "%s write failed\n", __func__);
1431 return ret;
1432 }
1433 /* USBChInputCurr: current that can be drawn from the usb */
1434 ret = ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr);
1435 if (ret) {
1436 dev_err(di->dev, "setting USBChInputCurr failed\n");
1437 return ret;
1438 }
1439 /* ChOutputCurentLevel: protected output current */
f8e96dff 1440 ret = ab8500_charger_set_output_curr(di, ich_out);
84edbeea 1441 if (ret) {
f8e96dff
JB		 1442 dev_err(di->dev, "%s "
1443 "Failed to set ChOutputCurentLevel\n",
1444 __func__);
84edbeea
AM		 1445 return ret;
1446 }
1447 /* Check if VBAT overshoot control should be enabled */
b0284de0 1448 if (!di->bm->enable_overshoot)
84edbeea
AM		 1449 overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;
1450
1451 /* Enable USB Charger */
1452 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1453 AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot);
1454 if (ret) {
1455 dev_err(di->dev, "%s write failed\n", __func__);
1456 return ret;
1457 }
1458
1459 /* If success power on charging LED indication */
1460 ret = ab8500_charger_led_en(di, true);
1461 if (ret < 0)
1462 dev_err(di->dev, "failed to enable LED\n");
1463
1464 queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);
1465
1466 di->usb.charger_online = 1;
1467 } else {
1468 /* Disable USB charging */
1469 ret = abx500_set_register_interruptible(di->dev,
1470 AB8500_CHARGER,
1471 AB8500_USBCH_CTRL1_REG, 0);
1472 if (ret) {
1473 dev_err(di->dev,
1474 "%s write failed\n", __func__);
1475 return ret;
1476 }
1477
1478 ret = ab8500_charger_led_en(di, false);
1479 if (ret < 0)
1480 dev_err(di->dev, "failed to disable LED\n");
1481
1482 di->usb.charger_online = 0;
1483 di->usb.wd_expired = false;
1484
1485 /* Disable regulator if enabled */
1486 if (di->vddadc_en_usb) {
1487 regulator_disable(di->regu);
1488 di->vddadc_en_usb = false;
1489 }
1490
1491 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1492
1493 /* Cancel any pending Vbat check work */
1494 if (delayed_work_pending(&di->check_vbat_work))
1495 cancel_delayed_work(&di->check_vbat_work);
1496
1497 }
1498 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1499
1500 return ret;
1501}
1502
1503/**
1504 * ab8500_charger_watchdog_kick() - kick charger watchdog
1505 * @di: pointer to the ab8500_charger structure
1506 *
1507 * Kick charger watchdog
1508 * Returns error code in case of failure else 0(on success)
1509 */
1510static int ab8500_charger_watchdog_kick(struct ux500_charger *charger)
1511{
1512 int ret;
1513 struct ab8500_charger *di;
1514
1515 if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS)
1516 di = to_ab8500_charger_ac_device_info(charger);
1517 else if (charger->psy.type == POWER_SUPPLY_TYPE_USB)
1518 di = to_ab8500_charger_usb_device_info(charger);
1519 else
1520 return -ENXIO;
1521
1522 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1523 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
1524 if (ret)
1525 dev_err(di->dev, "Failed to kick WD!\n");
1526
1527 return ret;
1528}
1529
1530/**
1531 * ab8500_charger_update_charger_current() - update charger current
1532 * @di: pointer to the ab8500_charger structure
1533 *
1534 * Update the charger output current for the specified charger
1535 * Returns error code in case of failure else 0(on success)
1536 */
1537static int ab8500_charger_update_charger_current(struct ux500_charger *charger,
1538 int ich_out)
1539{
1540 int ret;
84edbeea
AM		 1541 struct ab8500_charger *di;
1542
1543 if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS)
1544 di = to_ab8500_charger_ac_device_info(charger);
1545 else if (charger->psy.type == POWER_SUPPLY_TYPE_USB)
1546 di = to_ab8500_charger_usb_device_info(charger);
1547 else
1548 return -ENXIO;
1549
f8e96dff 1550 ret = ab8500_charger_set_output_curr(di, ich_out);
84edbeea 1551 if (ret) {
f8e96dff
JB		 1552 dev_err(di->dev, "%s "
1553 "Failed to set ChOutputCurentLevel\n",
1554 __func__);
84edbeea
AM		 1555 return ret;
1556 }
1557
1558 /* Reset the main and usb drop input current measurement counter */
1559 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1560 AB8500_CHARGER_CTRL,
1561 0x1);
1562 if (ret) {
1563 dev_err(di->dev, "%s write failed\n", __func__);
1564 return ret;
1565 }
1566
1567 return ret;
1568}
1569
1570static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
1571{
1572 struct power_supply *psy;
1573 struct power_supply *ext;
1574 struct ab8500_charger *di;
1575 union power_supply_propval ret;
1576 int i, j;
1577 bool psy_found = false;
1578 struct ux500_charger *usb_chg;
1579
1580 usb_chg = (struct ux500_charger *)data;
1581 psy = &usb_chg->psy;
1582
1583 di = to_ab8500_charger_usb_device_info(usb_chg);
1584
1585 ext = dev_get_drvdata(dev);
1586
1587 /* For all psy where the driver name appears in any supplied_to */
1588 for (i = 0; i < ext->num_supplicants; i++) {
1589 if (!strcmp(ext->supplied_to[i], psy->name))
1590 psy_found = true;
1591 }
1592
1593 if (!psy_found)
1594 return 0;
1595
1596 /* Go through all properties for the psy */
1597 for (j = 0; j < ext->num_properties; j++) {
1598 enum power_supply_property prop;
1599 prop = ext->properties[j];
1600
1601 if (ext->get_property(ext, prop, &ret))
1602 continue;
1603
1604 switch (prop) {
1605 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1606 switch (ext->type) {
1607 case POWER_SUPPLY_TYPE_BATTERY:
1608 di->vbat = ret.intval / 1000;
1609 break;
1610 default:
1611 break;
1612 }
1613 break;
1614 default:
1615 break;
1616 }
1617 }
1618 return 0;
1619}
1620
1621/**
1622 * ab8500_charger_check_vbat_work() - keep vbus current within spec
1623 * @work pointer to the work_struct structure
1624 *
1625 * Due to a asic bug it is necessary to lower the input current to the vbus
1626 * charger when charging with at some specific levels. This issue is only valid
1627 * for below a certain battery voltage. This function makes sure that the
1628 * the allowed current limit isn't exceeded.
1629 */
1630static void ab8500_charger_check_vbat_work(struct work_struct *work)
1631{
1632 int t = 10;
1633 struct ab8500_charger *di = container_of(work,
1634 struct ab8500_charger, check_vbat_work.work);
1635
1636 class_for_each_device(power_supply_class, NULL,
1637 &di->usb_chg.psy, ab8500_charger_get_ext_psy_data);
1638
1639 /* First run old_vbat is 0. */
1640 if (di->old_vbat == 0)
1641 di->old_vbat = di->vbat;
1642
1643 if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED &&
1644 di->vbat <= VBAT_TRESH_IP_CUR_RED) ||
1645 (di->old_vbat > VBAT_TRESH_IP_CUR_RED &&
1646 di->vbat > VBAT_TRESH_IP_CUR_RED))) {
1647
1648 dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d,"
1649 " old: %d\n", di->max_usb_in_curr, di->vbat,
1650 di->old_vbat);
1651 ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr);
1652 power_supply_changed(&di->usb_chg.psy);
1653 }
1654
1655 di->old_vbat = di->vbat;
1656
1657 /*
1658 * No need to check the battery voltage every second when not close to
1659 * the threshold.
1660 */
1661 if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) &&
1662 (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100)))
1663 t = 1;
1664
1665 queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ);
1666}
1667
1668/**
1669 * ab8500_charger_check_hw_failure_work() - check main charger failure
1670 * @work: pointer to the work_struct structure
1671 *
1672 * Work queue function for checking the main charger status
1673 */
1674static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
1675{
1676 int ret;
1677 u8 reg_value;
1678
1679 struct ab8500_charger *di = container_of(work,
1680 struct ab8500_charger, check_hw_failure_work.work);
1681
1682 /* Check if the status bits for HW failure is still active */
1683 if (di->flags.mainextchnotok) {
1684 ret = abx500_get_register_interruptible(di->dev,
1685 AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
1686 if (ret < 0) {
1687 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1688 return;
1689 }
1690 if (!(reg_value & MAIN_CH_NOK)) {
1691 di->flags.mainextchnotok = false;
1692 ab8500_power_supply_changed(di, &di->ac_chg.psy);
1693 }
1694 }
1695 if (di->flags.vbus_ovv) {
1696 ret = abx500_get_register_interruptible(di->dev,
1697 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG,
1698 &reg_value);
1699 if (ret < 0) {
1700 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1701 return;
1702 }
1703 if (!(reg_value & VBUS_OVV_TH)) {
1704 di->flags.vbus_ovv = false;
1705 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1706 }
1707 }
1708 /* If we still have a failure, schedule a new check */
1709 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
1710 queue_delayed_work(di->charger_wq,
1711 &di->check_hw_failure_work, round_jiffies(HZ));
1712 }
1713}
1714
1715/**
1716 * ab8500_charger_kick_watchdog_work() - kick the watchdog
1717 * @work: pointer to the work_struct structure
1718 *
1719 * Work queue function for kicking the charger watchdog.
1720 *
1721 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
1722 * logic. That means we have to continously kick the charger
1723 * watchdog even when no charger is connected. This is only
1724 * valid once the AC charger has been enabled. This is
1725 * a bug that is not handled by the algorithm and the
1726 * watchdog have to be kicked by the charger driver
1727 * when the AC charger is disabled
1728 */
1729static void ab8500_charger_kick_watchdog_work(struct work_struct *work)
1730{
1731 int ret;
1732
1733 struct ab8500_charger *di = container_of(work,
1734 struct ab8500_charger, kick_wd_work.work);
1735
1736 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1737 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
1738 if (ret)
1739 dev_err(di->dev, "Failed to kick WD!\n");
1740
1741 /* Schedule a new watchdog kick */
1742 queue_delayed_work(di->charger_wq,
1743 &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL));
1744}
1745
1746/**
1747 * ab8500_charger_ac_work() - work to get and set main charger status
1748 * @work: pointer to the work_struct structure
1749 *
1750 * Work queue function for checking the main charger status
1751 */
1752static void ab8500_charger_ac_work(struct work_struct *work)
1753{
1754 int ret;
1755
1756 struct ab8500_charger *di = container_of(work,
1757 struct ab8500_charger, ac_work);
1758
1759 /*
1760 * Since we can't be sure that the events are received
1761 * synchronously, we have the check if the main charger is
1762 * connected by reading the status register
1763 */
1764 ret = ab8500_charger_detect_chargers(di);
1765 if (ret < 0)
1766 return;
1767
1768 if (ret & AC_PW_CONN) {
1769 di->ac.charger_connected = 1;
1770 di->ac_conn = true;
1771 } else {
1772 di->ac.charger_connected = 0;
1773 }
1774
1775 ab8500_power_supply_changed(di, &di->ac_chg.psy);
1776 sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present");
1777}
1778
b269fff4
LJ		 1779static void ab8500_charger_usb_attached_work(struct work_struct *work)
1780{
1781 struct ab8500_charger *di = container_of(work,
1782 struct ab8500_charger,
1783 usb_charger_attached_work.work);
1784 int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC);
1785 int ret, i;
1786 u8 statval;
1787
1788 for (i = 0; i < 10; i++) {
1789 ret = abx500_get_register_interruptible(di->dev,
1790 AB8500_CHARGER,
1791 AB8500_CH_USBCH_STAT1_REG,
1792 &statval);
1793 if (ret < 0) {
1794 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1795 goto reschedule;
1796 }
1797 if ((statval & usbch) != usbch)
1798 goto reschedule;
1799
1800 msleep(CHARGER_STATUS_POLL);
1801 }
1802
1803 ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0);
1804
1805 mutex_lock(&di->charger_attached_mutex);
1806 mutex_unlock(&di->charger_attached_mutex);
1807
1808 return;
1809
1810reschedule:
1811 queue_delayed_work(di->charger_wq,
1812 &di->usb_charger_attached_work,
1813 HZ);
1814}
1815
1816static void ab8500_charger_ac_attached_work(struct work_struct *work)
1817{
1818
1819 struct ab8500_charger *di = container_of(work,
1820 struct ab8500_charger,
1821 ac_charger_attached_work.work);
1822 int mainch = (MAIN_CH_STATUS2_MAINCHGDROP |
1823 MAIN_CH_STATUS2_MAINCHARGERDETDBNC);
1824 int ret, i;
1825 u8 statval;
1826
1827 for (i = 0; i < 10; i++) {
1828 ret = abx500_get_register_interruptible(di->dev,
1829 AB8500_CHARGER,
1830 AB8500_CH_STATUS2_REG,
1831 &statval);
1832 if (ret < 0) {
1833 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1834 goto reschedule;
1835 }
1836
1837 if ((statval & mainch) != mainch)
1838 goto reschedule;
1839
1840 msleep(CHARGER_STATUS_POLL);
1841 }
1842
1843 ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0);
1844 queue_work(di->charger_wq, &di->ac_work);
1845
1846 mutex_lock(&di->charger_attached_mutex);
1847 mutex_unlock(&di->charger_attached_mutex);
1848
1849 return;
1850
1851reschedule:
1852 queue_delayed_work(di->charger_wq,
1853 &di->ac_charger_attached_work,
1854 HZ);
1855}
1856
84edbeea
AM		 1857/**
1858 * ab8500_charger_detect_usb_type_work() - work to detect USB type
1859 * @work: Pointer to the work_struct structure
1860 *
1861 * Detect the type of USB plugged
1862 */
64eb9b02 1863static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
84edbeea
AM		 1864{
1865 int ret;
1866
1867 struct ab8500_charger *di = container_of(work,
1868 struct ab8500_charger, detect_usb_type_work);
1869
1870 /*
1871 * Since we can't be sure that the events are received
1872 * synchronously, we have the check if is
1873 * connected by reading the status register
1874 */
1875 ret = ab8500_charger_detect_chargers(di);
1876 if (ret < 0)
1877 return;
1878
1879 if (!(ret & USB_PW_CONN)) {
1880 di->vbus_detected = 0;
1881 ab8500_charger_set_usb_connected(di, false);
1882 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1883 } else {
1884 di->vbus_detected = 1;
1885
1886 if (is_ab8500_1p1_or_earlier(di->parent)) {
1887 ret = ab8500_charger_detect_usb_type(di);
1888 if (!ret) {
1889 ab8500_charger_set_usb_connected(di, true);
1890 ab8500_power_supply_changed(di,
1891 &di->usb_chg.psy);
1892 }
1893 } else {
1894 /* For ABB cut2.0 and onwards we have an IRQ,
1895 * USB_LINK_STATUS that will be triggered when the USB
1896 * link status changes. The exception is USB connected
1897 * during startup. Then we don't get a
1898 * USB_LINK_STATUS IRQ
1899 */
1900 if (di->vbus_detected_start) {
1901 di->vbus_detected_start = false;
1902 ret = ab8500_charger_detect_usb_type(di);
1903 if (!ret) {
1904 ab8500_charger_set_usb_connected(di,
1905 true);
1906 ab8500_power_supply_changed(di,
1907 &di->usb_chg.psy);
1908 }
1909 }
1910 }
1911 }
1912}
1913
1914/**
1915 * ab8500_charger_usb_link_status_work() - work to detect USB type
1916 * @work: pointer to the work_struct structure
1917 *
1918 * Detect the type of USB plugged
1919 */
1920static void ab8500_charger_usb_link_status_work(struct work_struct *work)
1921{
1922 int ret;
1923
1924 struct ab8500_charger *di = container_of(work,
1925 struct ab8500_charger, usb_link_status_work);
1926
1927 /*
1928 * Since we can't be sure that the events are received
1929 * synchronously, we have the check if is
1930 * connected by reading the status register
1931 */
1932 ret = ab8500_charger_detect_chargers(di);
1933 if (ret < 0)
1934 return;
1935
1936 if (!(ret & USB_PW_CONN)) {
1937 di->vbus_detected = 0;
1938 ab8500_charger_set_usb_connected(di, false);
1939 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1940 } else {
1941 di->vbus_detected = 1;
1942 ret = ab8500_charger_read_usb_type(di);
1943 if (!ret) {
1944 /* Update maximum input current */
1945 ret = ab8500_charger_set_vbus_in_curr(di,
1946 di->max_usb_in_curr);
1947 if (ret)
1948 return;
1949
1950 ab8500_charger_set_usb_connected(di, true);
1951 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1952 } else if (ret == -ENXIO) {
1953 /* No valid charger type detected */
1954 ab8500_charger_set_usb_connected(di, false);
1955 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1956 }
1957 }
1958}
1959
1960static void ab8500_charger_usb_state_changed_work(struct work_struct *work)
1961{
1962 int ret;
1963 unsigned long flags;
1964
1965 struct ab8500_charger *di = container_of(work,
1966 struct ab8500_charger, usb_state_changed_work);
1967
1968 if (!di->vbus_detected)
1969 return;
1970
1971 spin_lock_irqsave(&di->usb_state.usb_lock, flags);
1972 di->usb_state.usb_changed = false;
1973 spin_unlock_irqrestore(&di->usb_state.usb_lock, flags);
1974
1975 /*
1976 * wait for some time until you get updates from the usb stack
1977 * and negotiations are completed
1978 */
1979 msleep(250);
1980
1981 if (di->usb_state.usb_changed)
1982 return;
1983
1984 dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n",
1985 __func__, di->usb_state.state, di->usb_state.usb_current);
1986
1987 switch (di->usb_state.state) {
1988 case AB8500_BM_USB_STATE_RESET_HS:
1989 case AB8500_BM_USB_STATE_RESET_FS:
1990 case AB8500_BM_USB_STATE_SUSPEND:
1991 case AB8500_BM_USB_STATE_MAX:
1992 ab8500_charger_set_usb_connected(di, false);
1993 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1994 break;
1995
1996 case AB8500_BM_USB_STATE_RESUME:
1997 /*
1998 * when suspend->resume there should be delay
1999 * of 1sec for enabling charging
2000 */
2001 msleep(1000);
2002 /* Intentional fall through */
2003 case AB8500_BM_USB_STATE_CONFIGURED:
2004 /*
2005 * USB is configured, enable charging with the charging
2006 * input current obtained from USB driver
2007 */
2008 if (!ab8500_charger_get_usb_cur(di)) {
2009 /* Update maximum input current */
2010 ret = ab8500_charger_set_vbus_in_curr(di,
2011 di->max_usb_in_curr);
2012 if (ret)
2013 return;
2014
2015 ab8500_charger_set_usb_connected(di, true);
2016 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2017 }
2018 break;
2019
2020 default:
2021 break;
2022 };
2023}
2024
2025/**
2026 * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status
2027 * @work: pointer to the work_struct structure
2028 *
2029 * Work queue function for checking the USB charger Not OK status
2030 */
2031static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work)
2032{
2033 int ret;
2034 u8 reg_value;
2035 bool prev_status;
2036
2037 struct ab8500_charger *di = container_of(work,
2038 struct ab8500_charger, check_usbchgnotok_work.work);
2039
2040 /* Check if the status bit for usbchargernotok is still active */
2041 ret = abx500_get_register_interruptible(di->dev,
2042 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
2043 if (ret < 0) {
2044 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2045 return;
2046 }
2047 prev_status = di->flags.usbchargernotok;
2048
2049 if (reg_value & VBUS_CH_NOK) {
2050 di->flags.usbchargernotok = true;
2051 /* Check again in 1sec */
2052 queue_delayed_work(di->charger_wq,
2053 &di->check_usbchgnotok_work, HZ);
2054 } else {
2055 di->flags.usbchargernotok = false;
2056 di->flags.vbus_collapse = false;
2057 }
2058
2059 if (prev_status != di->flags.usbchargernotok)
2060 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2061}
2062
2063/**
2064 * ab8500_charger_check_main_thermal_prot_work() - check main thermal status
2065 * @work: pointer to the work_struct structure
2066 *
2067 * Work queue function for checking the Main thermal prot status
2068 */
2069static void ab8500_charger_check_main_thermal_prot_work(
2070 struct work_struct *work)
2071{
2072 int ret;
2073 u8 reg_value;
2074
2075 struct ab8500_charger *di = container_of(work,
2076 struct ab8500_charger, check_main_thermal_prot_work);
2077
2078 /* Check if the status bit for main_thermal_prot is still active */
2079 ret = abx500_get_register_interruptible(di->dev,
2080 AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
2081 if (ret < 0) {
2082 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2083 return;
2084 }
2085 if (reg_value & MAIN_CH_TH_PROT)
2086 di->flags.main_thermal_prot = true;
2087 else
2088 di->flags.main_thermal_prot = false;
2089
2090 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2091}
2092
2093/**
2094 * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status
2095 * @work: pointer to the work_struct structure
2096 *
2097 * Work queue function for checking the USB thermal prot status
2098 */
2099static void ab8500_charger_check_usb_thermal_prot_work(
2100 struct work_struct *work)
2101{
2102 int ret;
2103 u8 reg_value;
2104
2105 struct ab8500_charger *di = container_of(work,
2106 struct ab8500_charger, check_usb_thermal_prot_work);
2107
2108 /* Check if the status bit for usb_thermal_prot is still active */
2109 ret = abx500_get_register_interruptible(di->dev,
2110 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
2111 if (ret < 0) {
2112 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2113 return;
2114 }
2115 if (reg_value & USB_CH_TH_PROT)
2116 di->flags.usb_thermal_prot = true;
2117 else
2118 di->flags.usb_thermal_prot = false;
2119
2120 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2121}
2122
2123/**
2124 * ab8500_charger_mainchunplugdet_handler() - main charger unplugged
2125 * @irq: interrupt number
2126 * @_di: pointer to the ab8500_charger structure
2127 *
2128 * Returns IRQ status(IRQ_HANDLED)
2129 */
2130static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di)
2131{
2132 struct ab8500_charger *di = _di;
2133
2134 dev_dbg(di->dev, "Main charger unplugged\n");
2135 queue_work(di->charger_wq, &di->ac_work);
2136
b269fff4
LJ		 2137 cancel_delayed_work_sync(&di->ac_charger_attached_work);
2138 mutex_lock(&di->charger_attached_mutex);
2139 mutex_unlock(&di->charger_attached_mutex);
2140
84edbeea
AM		 2141 return IRQ_HANDLED;
2142}
2143
2144/**
2145 * ab8500_charger_mainchplugdet_handler() - main charger plugged
2146 * @irq: interrupt number
2147 * @_di: pointer to the ab8500_charger structure
2148 *
2149 * Returns IRQ status(IRQ_HANDLED)
2150 */
2151static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di)
2152{
2153 struct ab8500_charger *di = _di;
2154
2155 dev_dbg(di->dev, "Main charger plugged\n");
2156 queue_work(di->charger_wq, &di->ac_work);
2157
b269fff4
LJ		 2158 mutex_lock(&di->charger_attached_mutex);
2159 mutex_unlock(&di->charger_attached_mutex);
2160 queue_delayed_work(di->charger_wq,
2161 &di->ac_charger_attached_work,
2162 HZ);
84edbeea
AM		 2163 return IRQ_HANDLED;
2164}
2165
2166/**
2167 * ab8500_charger_mainextchnotok_handler() - main charger not ok
2168 * @irq: interrupt number
2169 * @_di: pointer to the ab8500_charger structure
2170 *
2171 * Returns IRQ status(IRQ_HANDLED)
2172 */
2173static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di)
2174{
2175 struct ab8500_charger *di = _di;
2176
2177 dev_dbg(di->dev, "Main charger not ok\n");
2178 di->flags.mainextchnotok = true;
2179 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2180
2181 /* Schedule a new HW failure check */
2182 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2183
2184 return IRQ_HANDLED;
2185}
2186
2187/**
2188 * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger
2189 * thermal protection threshold
2190 * @irq: interrupt number
2191 * @_di: pointer to the ab8500_charger structure
2192 *
2193 * Returns IRQ status(IRQ_HANDLED)
2194 */
2195static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di)
2196{
2197 struct ab8500_charger *di = _di;
2198
2199 dev_dbg(di->dev,
2200 "Die temp above Main charger thermal protection threshold\n");
2201 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2202
2203 return IRQ_HANDLED;
2204}
2205
2206/**
2207 * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger
2208 * thermal protection threshold
2209 * @irq: interrupt number
2210 * @_di: pointer to the ab8500_charger structure
2211 *
2212 * Returns IRQ status(IRQ_HANDLED)
2213 */
2214static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di)
2215{
2216 struct ab8500_charger *di = _di;
2217
2218 dev_dbg(di->dev,
2219 "Die temp ok for Main charger thermal protection threshold\n");
2220 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2221
2222 return IRQ_HANDLED;
2223}
2224
2225/**
2226 * ab8500_charger_vbusdetf_handler() - VBUS falling detected
2227 * @irq: interrupt number
2228 * @_di: pointer to the ab8500_charger structure
2229 *
2230 * Returns IRQ status(IRQ_HANDLED)
2231 */
2232static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di)
2233{
2234 struct ab8500_charger *di = _di;
2235
2236 dev_dbg(di->dev, "VBUS falling detected\n");
2237 queue_work(di->charger_wq, &di->detect_usb_type_work);
2238
2239 return IRQ_HANDLED;
2240}
2241
2242/**
2243 * ab8500_charger_vbusdetr_handler() - VBUS rising detected
2244 * @irq: interrupt number
2245 * @_di: pointer to the ab8500_charger structure
2246 *
2247 * Returns IRQ status(IRQ_HANDLED)
2248 */
2249static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di)
2250{
2251 struct ab8500_charger *di = _di;
2252
2253 di->vbus_detected = true;
2254 dev_dbg(di->dev, "VBUS rising detected\n");
2255 queue_work(di->charger_wq, &di->detect_usb_type_work);
2256
2257 return IRQ_HANDLED;
2258}
2259
2260/**
2261 * ab8500_charger_usblinkstatus_handler() - USB link status has changed
2262 * @irq: interrupt number
2263 * @_di: pointer to the ab8500_charger structure
2264 *
2265 * Returns IRQ status(IRQ_HANDLED)
2266 */
2267static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di)
2268{
2269 struct ab8500_charger *di = _di;
2270
2271 dev_dbg(di->dev, "USB link status changed\n");
2272
2273 queue_work(di->charger_wq, &di->usb_link_status_work);
2274
2275 return IRQ_HANDLED;
2276}
2277
2278/**
2279 * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger
2280 * thermal protection threshold
2281 * @irq: interrupt number
2282 * @_di: pointer to the ab8500_charger structure
2283 *
2284 * Returns IRQ status(IRQ_HANDLED)
2285 */
2286static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di)
2287{
2288 struct ab8500_charger *di = _di;
2289
2290 dev_dbg(di->dev,
2291 "Die temp above USB charger thermal protection threshold\n");
2292 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2293
2294 return IRQ_HANDLED;
2295}
2296
2297/**
2298 * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger
2299 * thermal protection threshold
2300 * @irq: interrupt number
2301 * @_di: pointer to the ab8500_charger structure
2302 *
2303 * Returns IRQ status(IRQ_HANDLED)
2304 */
2305static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di)
2306{
2307 struct ab8500_charger *di = _di;
2308
2309 dev_dbg(di->dev,
2310 "Die temp ok for USB charger thermal protection threshold\n");
2311 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2312
2313 return IRQ_HANDLED;
2314}
2315
2316/**
2317 * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected
2318 * @irq: interrupt number
2319 * @_di: pointer to the ab8500_charger structure
2320 *
2321 * Returns IRQ status(IRQ_HANDLED)
2322 */
2323static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di)
2324{
2325 struct ab8500_charger *di = _di;
2326
2327 dev_dbg(di->dev, "Not allowed USB charger detected\n");
2328 queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0);
2329
2330 return IRQ_HANDLED;
2331}
2332
2333/**
2334 * ab8500_charger_chwdexp_handler() - Charger watchdog expired
2335 * @irq: interrupt number
2336 * @_di: pointer to the ab8500_charger structure
2337 *
2338 * Returns IRQ status(IRQ_HANDLED)
2339 */
2340static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di)
2341{
2342 struct ab8500_charger *di = _di;
2343
2344 dev_dbg(di->dev, "Charger watchdog expired\n");
2345
2346 /*
2347 * The charger that was online when the watchdog expired
2348 * needs to be restarted for charging to start again
2349 */
2350 if (di->ac.charger_online) {
2351 di->ac.wd_expired = true;
2352 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2353 }
2354 if (di->usb.charger_online) {
2355 di->usb.wd_expired = true;
2356 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2357 }
2358
2359 return IRQ_HANDLED;
2360}
2361
2362/**
2363 * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected
2364 * @irq: interrupt number
2365 * @_di: pointer to the ab8500_charger structure
2366 *
2367 * Returns IRQ status(IRQ_HANDLED)
2368 */
2369static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di)
2370{
2371 struct ab8500_charger *di = _di;
2372
2373 dev_dbg(di->dev, "VBUS overvoltage detected\n");
2374 di->flags.vbus_ovv = true;
2375 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2376
2377 /* Schedule a new HW failure check */
2378 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2379
2380 return IRQ_HANDLED;
2381}
2382
2383/**
2384 * ab8500_charger_ac_get_property() - get the ac/mains properties
2385 * @psy: pointer to the power_supply structure
2386 * @psp: pointer to the power_supply_property structure
2387 * @val: pointer to the power_supply_propval union
2388 *
2389 * This function gets called when an application tries to get the ac/mains
2390 * properties by reading the sysfs files.
2391 * AC/Mains properties are online, present and voltage.
2392 * online: ac/mains charging is in progress or not
2393 * present: presence of the ac/mains
2394 * voltage: AC/Mains voltage
2395 * Returns error code in case of failure else 0(on success)
2396 */
2397static int ab8500_charger_ac_get_property(struct power_supply *psy,
2398 enum power_supply_property psp,
2399 union power_supply_propval *val)
2400{
2401 struct ab8500_charger *di;
a864c5a8 2402 int ret;
84edbeea
AM		 2403
2404 di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy));
2405
2406 switch (psp) {
2407 case POWER_SUPPLY_PROP_HEALTH:
2408 if (di->flags.mainextchnotok)
2409 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2410 else if (di->ac.wd_expired || di->usb.wd_expired)
2411 val->intval = POWER_SUPPLY_HEALTH_DEAD;
2412 else if (di->flags.main_thermal_prot)
2413 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2414 else
2415 val->intval = POWER_SUPPLY_HEALTH_GOOD;
2416 break;
2417 case POWER_SUPPLY_PROP_ONLINE:
2418 val->intval = di->ac.charger_online;
2419 break;
2420 case POWER_SUPPLY_PROP_PRESENT:
2421 val->intval = di->ac.charger_connected;
2422 break;
2423 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
a864c5a8
JA		 2424 ret = ab8500_charger_get_ac_voltage(di);
2425 if (ret >= 0)
2426 di->ac.charger_voltage = ret;
2427 /* On error, use previous value */
84edbeea
AM		 2428 val->intval = di->ac.charger_voltage * 1000;
2429 break;
2430 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2431 /*
2432 * This property is used to indicate when CV mode is entered
2433 * for the AC charger
2434 */
2435 di->ac.cv_active = ab8500_charger_ac_cv(di);
2436 val->intval = di->ac.cv_active;
2437 break;
2438 case POWER_SUPPLY_PROP_CURRENT_NOW:
a864c5a8
JA		 2439 ret = ab8500_charger_get_ac_current(di);
2440 if (ret >= 0)
2441 di->ac.charger_current = ret;
2442 val->intval = di->ac.charger_current * 1000;
84edbeea
AM		 2443 break;
2444 default:
2445 return -EINVAL;
2446 }
2447 return 0;
2448}
2449
2450/**
2451 * ab8500_charger_usb_get_property() - get the usb properties
2452 * @psy: pointer to the power_supply structure
2453 * @psp: pointer to the power_supply_property structure
2454 * @val: pointer to the power_supply_propval union
2455 *
2456 * This function gets called when an application tries to get the usb
2457 * properties by reading the sysfs files.
2458 * USB properties are online, present and voltage.
2459 * online: usb charging is in progress or not
2460 * present: presence of the usb
2461 * voltage: vbus voltage
2462 * Returns error code in case of failure else 0(on success)
2463 */
2464static int ab8500_charger_usb_get_property(struct power_supply *psy,
2465 enum power_supply_property psp,
2466 union power_supply_propval *val)
2467{
2468 struct ab8500_charger *di;
a864c5a8 2469 int ret;
84edbeea
AM		 2470
2471 di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy));
2472
2473 switch (psp) {
2474 case POWER_SUPPLY_PROP_HEALTH:
2475 if (di->flags.usbchargernotok)
2476 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2477 else if (di->ac.wd_expired || di->usb.wd_expired)
2478 val->intval = POWER_SUPPLY_HEALTH_DEAD;
2479 else if (di->flags.usb_thermal_prot)
2480 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2481 else if (di->flags.vbus_ovv)
2482 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
2483 else
2484 val->intval = POWER_SUPPLY_HEALTH_GOOD;
2485 break;
2486 case POWER_SUPPLY_PROP_ONLINE:
2487 val->intval = di->usb.charger_online;
2488 break;
2489 case POWER_SUPPLY_PROP_PRESENT:
2490 val->intval = di->usb.charger_connected;
2491 break;
2492 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
a864c5a8
JA		 2493 ret = ab8500_charger_get_vbus_voltage(di);
2494 if (ret >= 0)
2495 di->usb.charger_voltage = ret;
84edbeea
AM		 2496 val->intval = di->usb.charger_voltage * 1000;
2497 break;
2498 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2499 /*
2500 * This property is used to indicate when CV mode is entered
2501 * for the USB charger
2502 */
2503 di->usb.cv_active = ab8500_charger_usb_cv(di);
2504 val->intval = di->usb.cv_active;
2505 break;
2506 case POWER_SUPPLY_PROP_CURRENT_NOW:
a864c5a8
JA		 2507 ret = ab8500_charger_get_usb_current(di);
2508 if (ret >= 0)
2509 di->usb.charger_current = ret;
2510 val->intval = di->usb.charger_current * 1000;
84edbeea
AM		 2511 break;
2512 case POWER_SUPPLY_PROP_CURRENT_AVG:
2513 /*
2514 * This property is used to indicate when VBUS has collapsed
2515 * due to too high output current from the USB charger
2516 */
2517 if (di->flags.vbus_collapse)
2518 val->intval = 1;
2519 else
2520 val->intval = 0;
2521 break;
2522 default:
2523 return -EINVAL;
2524 }
2525 return 0;
2526}
2527
2528/**
2529 * ab8500_charger_init_hw_registers() - Set up charger related registers
2530 * @di: pointer to the ab8500_charger structure
2531 *
2532 * Set up charger OVV, watchdog and maximum voltage registers as well as
2533 * charging of the backup battery
2534 */
2535static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
2536{
2537 int ret = 0;
2538
2539 /* Setup maximum charger current and voltage for ABB cut2.0 */
2540 if (!is_ab8500_1p1_or_earlier(di->parent)) {
2541 ret = abx500_set_register_interruptible(di->dev,
2542 AB8500_CHARGER,
2543 AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6);
2544 if (ret) {
2545 dev_err(di->dev,
2546 "failed to set CH_VOLT_LVL_MAX_REG\n");
2547 goto out;
2548 }
2549
2550 ret = abx500_set_register_interruptible(di->dev,
2551 AB8500_CHARGER,
2552 AB8500_CH_OPT_CRNTLVL_MAX_REG, CH_OP_CUR_LVL_1P6);
2553 if (ret) {
2554 dev_err(di->dev,
2555 "failed to set CH_OPT_CRNTLVL_MAX_REG\n");
2556 goto out;
2557 }
2558 }
2559
2560 /* VBUS OVV set to 6.3V and enable automatic current limitiation */
2561 ret = abx500_set_register_interruptible(di->dev,
2562 AB8500_CHARGER,
2563 AB8500_USBCH_CTRL2_REG,
2564 VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA);
2565 if (ret) {
2566 dev_err(di->dev, "failed to set VBUS OVV\n");
2567 goto out;
2568 }
2569
2570 /* Enable main watchdog in OTP */
2571 ret = abx500_set_register_interruptible(di->dev,
2572 AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD);
2573 if (ret) {
2574 dev_err(di->dev, "failed to enable main WD in OTP\n");
2575 goto out;
2576 }
2577
2578 /* Enable main watchdog */
2579 ret = abx500_set_register_interruptible(di->dev,
2580 AB8500_SYS_CTRL2_BLOCK,
2581 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA);
2582 if (ret) {
2583 dev_err(di->dev, "faile to enable main watchdog\n");
2584 goto out;
2585 }
2586
2587 /*
2588 * Due to internal synchronisation, Enable and Kick watchdog bits
2589 * cannot be enabled in a single write.
2590 * A minimum delay of 2*32 kHz period (62.5µs) must be inserted
2591 * between writing Enable then Kick bits.
2592 */
2593 udelay(63);
2594
2595 /* Kick main watchdog */
2596 ret = abx500_set_register_interruptible(di->dev,
2597 AB8500_SYS_CTRL2_BLOCK,
2598 AB8500_MAIN_WDOG_CTRL_REG,
2599 (MAIN_WDOG_ENA | MAIN_WDOG_KICK));
2600 if (ret) {
2601 dev_err(di->dev, "failed to kick main watchdog\n");
2602 goto out;
2603 }
2604
2605 /* Disable main watchdog */
2606 ret = abx500_set_register_interruptible(di->dev,
2607 AB8500_SYS_CTRL2_BLOCK,
2608 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS);
2609 if (ret) {
2610 dev_err(di->dev, "failed to disable main watchdog\n");
2611 goto out;
2612 }
2613
2614 /* Set watchdog timeout */
2615 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
2616 AB8500_CH_WD_TIMER_REG, WD_TIMER);
2617 if (ret) {
2618 dev_err(di->dev, "failed to set charger watchdog timeout\n");
2619 goto out;
2620 }
2621
2622 /* Backup battery voltage and current */
2623 ret = abx500_set_register_interruptible(di->dev,
2624 AB8500_RTC,
2625 AB8500_RTC_BACKUP_CHG_REG,
b0284de0
LJ		 2626 di->bm->bkup_bat_v |
2627 di->bm->bkup_bat_i);
84edbeea
AM		 2628 if (ret) {
2629 dev_err(di->dev, "failed to setup backup battery charging\n");
2630 goto out;
2631 }
2632
2633 /* Enable backup battery charging */
2634 abx500_mask_and_set_register_interruptible(di->dev,
2635 AB8500_RTC, AB8500_RTC_CTRL_REG,
2636 RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
2637 if (ret < 0)
2638 dev_err(di->dev, "%s mask and set failed\n", __func__);
2639
2640out:
2641 return ret;
2642}
2643
2644/*
2645 * ab8500 charger driver interrupts and their respective isr
2646 */
2647static struct ab8500_charger_interrupts ab8500_charger_irq[] = {
2648 {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler},
2649 {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler},
2650 {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler},
2651 {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler},
2652 {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler},
2653 {"VBUS_DET_F", ab8500_charger_vbusdetf_handler},
2654 {"VBUS_DET_R", ab8500_charger_vbusdetr_handler},
2655 {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler},
2656 {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler},
2657 {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler},
2658 {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler},
2659 {"VBUS_OVV", ab8500_charger_vbusovv_handler},
2660 {"CH_WD_EXP", ab8500_charger_chwdexp_handler},
2661};
2662
2663static int ab8500_charger_usb_notifier_call(struct notifier_block *nb,
2664 unsigned long event, void *power)
2665{
2666 struct ab8500_charger *di =
2667 container_of(nb, struct ab8500_charger, nb);
2668 enum ab8500_usb_state bm_usb_state;
2669 unsigned mA = *((unsigned *)power);
2670
2671 if (event != USB_EVENT_VBUS) {
2672 dev_dbg(di->dev, "not a standard host, returning\n");
2673 return NOTIFY_DONE;
2674 }
2675
2676 /* TODO: State is fabricate here. See if charger really needs USB
2677 * state or if mA is enough
2678 */
2679 if ((di->usb_state.usb_current == 2) && (mA > 2))
2680 bm_usb_state = AB8500_BM_USB_STATE_RESUME;
2681 else if (mA == 0)
2682 bm_usb_state = AB8500_BM_USB_STATE_RESET_HS;
2683 else if (mA == 2)
2684 bm_usb_state = AB8500_BM_USB_STATE_SUSPEND;
2685 else if (mA >= 8) /* 8, 100, 500 */
2686 bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED;
2687 else /* Should never occur */
2688 bm_usb_state = AB8500_BM_USB_STATE_RESET_FS;
2689
2690 dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n",
2691 __func__, bm_usb_state, mA);
2692
2693 spin_lock(&di->usb_state.usb_lock);
2694 di->usb_state.usb_changed = true;
2695 spin_unlock(&di->usb_state.usb_lock);
2696
2697 di->usb_state.state = bm_usb_state;
2698 di->usb_state.usb_current = mA;
2699
2700 queue_work(di->charger_wq, &di->usb_state_changed_work);
2701
2702 return NOTIFY_OK;
2703}
2704
2705#if defined(CONFIG_PM)
2706static int ab8500_charger_resume(struct platform_device *pdev)
2707{
2708 int ret;
2709 struct ab8500_charger *di = platform_get_drvdata(pdev);
2710
2711 /*
2712 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
2713 * logic. That means we have to continously kick the charger
2714 * watchdog even when no charger is connected. This is only
2715 * valid once the AC charger has been enabled. This is
2716 * a bug that is not handled by the algorithm and the
2717 * watchdog have to be kicked by the charger driver
2718 * when the AC charger is disabled
2719 */
2720 if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) {
2721 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
2722 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
2723 if (ret)
2724 dev_err(di->dev, "Failed to kick WD!\n");
2725
2726 /* If not already pending start a new timer */
2727 if (!delayed_work_pending(
2728 &di->kick_wd_work)) {
2729 queue_delayed_work(di->charger_wq, &di->kick_wd_work,
2730 round_jiffies(WD_KICK_INTERVAL));
2731 }
2732 }
2733
2734 /* If we still have a HW failure, schedule a new check */
2735 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
2736 queue_delayed_work(di->charger_wq,
2737 &di->check_hw_failure_work, 0);
2738 }
2739
2740 return 0;
2741}
2742
2743static int ab8500_charger_suspend(struct platform_device *pdev,
2744 pm_message_t state)
2745{
2746 struct ab8500_charger *di = platform_get_drvdata(pdev);
2747
2748 /* Cancel any pending HW failure check */
2749 if (delayed_work_pending(&di->check_hw_failure_work))
2750 cancel_delayed_work(&di->check_hw_failure_work);
2751
2752 return 0;
2753}
2754#else
2755#define ab8500_charger_suspend NULL
2756#define ab8500_charger_resume NULL
2757#endif
2758
415ec69f 2759static int ab8500_charger_remove(struct platform_device *pdev)
84edbeea
AM		 2760{
2761 struct ab8500_charger *di = platform_get_drvdata(pdev);
2762 int i, irq, ret;
2763
2764 /* Disable AC charging */
2765 ab8500_charger_ac_en(&di->ac_chg, false, 0, 0);
2766
2767 /* Disable USB charging */
2768 ab8500_charger_usb_en(&di->usb_chg, false, 0, 0);
2769
2770 /* Disable interrupts */
2771 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
2772 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
2773 free_irq(irq, di);
2774 }
2775
84edbeea
AM		 2776 /* Backup battery voltage and current disable */
2777 ret = abx500_mask_and_set_register_interruptible(di->dev,
2778 AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0);
2779 if (ret < 0)
2780 dev_err(di->dev, "%s mask and set failed\n", __func__);
2781
efd71c89 2782 usb_unregister_notifier(di->usb_phy, &di->nb);
721002ec 2783 usb_put_phy(di->usb_phy);
84edbeea
AM		 2784
2785 /* Delete the work queue */
2786 destroy_workqueue(di->charger_wq);
2787
2788 flush_scheduled_work();
2789 power_supply_unregister(&di->usb_chg.psy);
2790 power_supply_unregister(&di->ac_chg.psy);
2791 platform_set_drvdata(pdev, NULL);
84edbeea
AM		 2792
2793 return 0;
2794}
2795
4aef72db
R		 2796static char *supply_interface[] = {
2797 "ab8500_chargalg",
2798 "ab8500_fg",
2799 "ab8500_btemp",
2800};
2801
c8afa640 2802static int ab8500_charger_probe(struct platform_device *pdev)
84edbeea 2803{
4aef72db 2804 struct device_node *np = pdev->dev.of_node;
7722b799 2805 struct abx500_bm_data *plat = pdev->dev.platform_data;
2aac3de1 2806 struct ab8500_charger *di;
b269fff4 2807 int irq, i, charger_status, ret = 0, ch_stat;
84edbeea 2808
4aef72db
R		 2809 di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
2810 if (!di) {
2811 dev_err(&pdev->dev, "%s no mem for ab8500_charger\n", __func__);
84edbeea 2812 return -ENOMEM;
4aef72db 2813 }
7722b799
LJ		 2814
2815 if (!plat) {
2816 dev_err(&pdev->dev, "no battery management data supplied\n");
2817 return -EINVAL;
2818 }
2819 di->bm = plat;
2820
2821 if (np) {
2822 ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm);
2823 if (ret) {
2824 dev_err(&pdev->dev, "failed to get battery information\n");
2825 return ret;
4aef72db 2826 }
7722b799
LJ		 2827 di->autopower_cfg = of_property_read_bool(np, "autopower_cfg");
2828 } else
4aef72db 2829 di->autopower_cfg = false;
84edbeea
AM		 2830
2831 /* get parent data */
2832 di->dev = &pdev->dev;
2833 di->parent = dev_get_drvdata(pdev->dev.parent);
2834 di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
2835
2836 /* initialize lock */
2837 spin_lock_init(&di->usb_state.usb_lock);
2838
84edbeea
AM		 2839 di->autopower = false;
2840
2841 /* AC supply */
2842 /* power_supply base class */
2843 di->ac_chg.psy.name = "ab8500_ac";
2844 di->ac_chg.psy.type = POWER_SUPPLY_TYPE_MAINS;
2845 di->ac_chg.psy.properties = ab8500_charger_ac_props;
2846 di->ac_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_ac_props);
2847 di->ac_chg.psy.get_property = ab8500_charger_ac_get_property;
4aef72db
R		 2848 di->ac_chg.psy.supplied_to = supply_interface;
2849 di->ac_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface),
84edbeea
AM		 2850 /* ux500_charger sub-class */
2851 di->ac_chg.ops.enable = &ab8500_charger_ac_en;
2852 di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
2853 di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current;
2854 di->ac_chg.max_out_volt = ab8500_charger_voltage_map[
2855 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
2856 di->ac_chg.max_out_curr = ab8500_charger_current_map[
2857 ARRAY_SIZE(ab8500_charger_current_map) - 1];
2858
2859 /* USB supply */
2860 /* power_supply base class */
2861 di->usb_chg.psy.name = "ab8500_usb";
2862 di->usb_chg.psy.type = POWER_SUPPLY_TYPE_USB;
2863 di->usb_chg.psy.properties = ab8500_charger_usb_props;
2864 di->usb_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_usb_props);
2865 di->usb_chg.psy.get_property = ab8500_charger_usb_get_property;
4aef72db
R		 2866 di->usb_chg.psy.supplied_to = supply_interface;
2867 di->usb_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface),
84edbeea
AM		 2868 /* ux500_charger sub-class */
2869 di->usb_chg.ops.enable = &ab8500_charger_usb_en;
2870 di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
2871 di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current;
2872 di->usb_chg.max_out_volt = ab8500_charger_voltage_map[
2873 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
2874 di->usb_chg.max_out_curr = ab8500_charger_current_map[
2875 ARRAY_SIZE(ab8500_charger_current_map) - 1];
2876
2877
2878 /* Create a work queue for the charger */
2879 di->charger_wq =
2880 create_singlethread_workqueue("ab8500_charger_wq");
2881 if (di->charger_wq == NULL) {
2882 dev_err(di->dev, "failed to create work queue\n");
4aef72db 2883 return -ENOMEM;
84edbeea
AM		 2884 }
2885
b269fff4
LJ		 2886 mutex_init(&di->charger_attached_mutex);
2887
84edbeea 2888 /* Init work for HW failure check */
203b42f7 2889 INIT_DEFERRABLE_WORK(&di->check_hw_failure_work,
84edbeea 2890 ab8500_charger_check_hw_failure_work);
203b42f7 2891 INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work,
84edbeea
AM		 2892 ab8500_charger_check_usbchargernotok_work);
2893
b269fff4
LJ		 2894 INIT_DELAYED_WORK(&di->ac_charger_attached_work,
2895 ab8500_charger_ac_attached_work);
2896 INIT_DELAYED_WORK(&di->usb_charger_attached_work,
2897 ab8500_charger_usb_attached_work);
2898
84edbeea
AM		 2899 /*
2900 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
2901 * logic. That means we have to continously kick the charger
2902 * watchdog even when no charger is connected. This is only
2903 * valid once the AC charger has been enabled. This is
2904 * a bug that is not handled by the algorithm and the
2905 * watchdog have to be kicked by the charger driver
2906 * when the AC charger is disabled
2907 */
203b42f7 2908 INIT_DEFERRABLE_WORK(&di->kick_wd_work,
84edbeea
AM		 2909 ab8500_charger_kick_watchdog_work);
2910
203b42f7 2911 INIT_DEFERRABLE_WORK(&di->check_vbat_work,
84edbeea
AM		 2912 ab8500_charger_check_vbat_work);
2913
2914 /* Init work for charger detection */
2915 INIT_WORK(&di->usb_link_status_work,
2916 ab8500_charger_usb_link_status_work);
2917 INIT_WORK(&di->ac_work, ab8500_charger_ac_work);
2918 INIT_WORK(&di->detect_usb_type_work,
2919 ab8500_charger_detect_usb_type_work);
2920
2921 INIT_WORK(&di->usb_state_changed_work,
2922 ab8500_charger_usb_state_changed_work);
2923
2924 /* Init work for checking HW status */
2925 INIT_WORK(&di->check_main_thermal_prot_work,
2926 ab8500_charger_check_main_thermal_prot_work);
2927 INIT_WORK(&di->check_usb_thermal_prot_work,
2928 ab8500_charger_check_usb_thermal_prot_work);
2929
2930 /*
2931 * VDD ADC supply needs to be enabled from this driver when there
2932 * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
2933 * interrupts during charging
2934 */
8feffd10 2935 di->regu = devm_regulator_get(di->dev, "vddadc");
84edbeea
AM		 2936 if (IS_ERR(di->regu)) {
2937 ret = PTR_ERR(di->regu);
2938 dev_err(di->dev, "failed to get vddadc regulator\n");
2939 goto free_charger_wq;
2940 }
2941
2942
2943 /* Initialize OVV, and other registers */
2944 ret = ab8500_charger_init_hw_registers(di);
2945 if (ret) {
2946 dev_err(di->dev, "failed to initialize ABB registers\n");
8feffd10 2947 goto free_charger_wq;
84edbeea
AM		 2948 }
2949
2950 /* Register AC charger class */
2951 ret = power_supply_register(di->dev, &di->ac_chg.psy);
2952 if (ret) {
2953 dev_err(di->dev, "failed to register AC charger\n");
8feffd10 2954 goto free_charger_wq;
84edbeea
AM		 2955 }
2956
2957 /* Register USB charger class */
2958 ret = power_supply_register(di->dev, &di->usb_chg.psy);
2959 if (ret) {
2960 dev_err(di->dev, "failed to register USB charger\n");
2961 goto free_ac;
2962 }
2963
662dca54 2964 di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
ded017ee 2965 if (IS_ERR_OR_NULL(di->usb_phy)) {
efd71c89 2966 dev_err(di->dev, "failed to get usb transceiver\n");
84edbeea
AM		 2967 ret = -EINVAL;
2968 goto free_usb;
2969 }
2970 di->nb.notifier_call = ab8500_charger_usb_notifier_call;
efd71c89 2971 ret = usb_register_notifier(di->usb_phy, &di->nb);
84edbeea 2972 if (ret) {
efd71c89
AV		 2973 dev_err(di->dev, "failed to register usb notifier\n");
2974 goto put_usb_phy;
84edbeea
AM		 2975 }
2976
2977 /* Identify the connected charger types during startup */
2978 charger_status = ab8500_charger_detect_chargers(di);
2979 if (charger_status & AC_PW_CONN) {
2980 di->ac.charger_connected = 1;
2981 di->ac_conn = true;
2982 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2983 sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present");
2984 }
2985
2986 if (charger_status & USB_PW_CONN) {
84edbeea
AM		 2987 di->vbus_detected = true;
2988 di->vbus_detected_start = true;
2989 queue_work(di->charger_wq,
2990 &di->detect_usb_type_work);
2991 }
2992
2993 /* Register interrupts */
2994 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
2995 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
2996 ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr,
2997 IRQF_SHARED | IRQF_NO_SUSPEND,
2998 ab8500_charger_irq[i].name, di);
2999
3000 if (ret != 0) {
3001 dev_err(di->dev, "failed to request %s IRQ %d: %d\n"
3002 , ab8500_charger_irq[i].name, irq, ret);
3003 goto free_irq;
3004 }
3005 dev_dbg(di->dev, "Requested %s IRQ %d: %d\n",
3006 ab8500_charger_irq[i].name, irq, ret);
3007 }
3008
3009 platform_set_drvdata(pdev, di);
3010
b269fff4
LJ		 3011 mutex_lock(&di->charger_attached_mutex);
3012
3013 ch_stat = ab8500_charger_detect_chargers(di);
3014
3015 if ((ch_stat & AC_PW_CONN) == AC_PW_CONN) {
3016 queue_delayed_work(di->charger_wq,
3017 &di->ac_charger_attached_work,
3018 HZ);
3019 }
3020 if ((ch_stat & USB_PW_CONN) == USB_PW_CONN) {
3021 queue_delayed_work(di->charger_wq,
3022 &di->usb_charger_attached_work,
3023 HZ);
3024 }
3025
3026 mutex_unlock(&di->charger_attached_mutex);
3027
84edbeea
AM		 3028 return ret;
3029
3030free_irq:
efd71c89 3031 usb_unregister_notifier(di->usb_phy, &di->nb);
84edbeea
AM		 3032
3033 /* We also have to free all successfully registered irqs */
3034 for (i = i - 1; i >= 0; i--) {
3035 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3036 free_irq(irq, di);
3037 }
efd71c89 3038put_usb_phy:
721002ec 3039 usb_put_phy(di->usb_phy);
84edbeea
AM		 3040free_usb:
3041 power_supply_unregister(&di->usb_chg.psy);
3042free_ac:
3043 power_supply_unregister(&di->ac_chg.psy);
84edbeea
AM		 3044free_charger_wq:
3045 destroy_workqueue(di->charger_wq);
84edbeea
AM		 3046 return ret;
3047}
3048
4aef72db
R		 3049static const struct of_device_id ab8500_charger_match[] = {
3050 { .compatible = "stericsson,ab8500-charger", },
3051 { },
3052};
3053
84edbeea
AM		 3054static struct platform_driver ab8500_charger_driver = {
3055 .probe = ab8500_charger_probe,
28ea73f4 3056 .remove = ab8500_charger_remove,
84edbeea
AM		 3057 .suspend = ab8500_charger_suspend,
3058 .resume = ab8500_charger_resume,
3059 .driver = {
3060 .name = "ab8500-charger",
3061 .owner = THIS_MODULE,
4aef72db 3062 .of_match_table = ab8500_charger_match,
84edbeea
AM		 3063 },
3064};
3065
3066static int __init ab8500_charger_init(void)
3067{
3068 return platform_driver_register(&ab8500_charger_driver);
3069}
3070
3071static void __exit ab8500_charger_exit(void)
3072{
3073 platform_driver_unregister(&ab8500_charger_driver);
3074}
3075
3076subsys_initcall_sync(ab8500_charger_init);
3077module_exit(ab8500_charger_exit);
3078
3079MODULE_LICENSE("GPL v2");
3080MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
3081MODULE_ALIAS("platform:ab8500-charger");
3082MODULE_DESCRIPTION("AB8500 charger management driver");
Linux 6.x block layer and io_uring tree(s)