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ab8500_bm: Skip first CCEOC irq for instant current
[GitHub/mt8127/android_kernel_alcatel_ttab.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>
34
35/* Charger constants */
36#define NO_PW_CONN 0
37#define AC_PW_CONN 1
38#define USB_PW_CONN 2
39
40#define MAIN_WDOG_ENA 0x01
41#define MAIN_WDOG_KICK 0x02
42#define MAIN_WDOG_DIS 0x00
43#define CHARG_WD_KICK 0x01
44#define MAIN_CH_ENA 0x01
45#define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02
46#define USB_CH_ENA 0x01
47#define USB_CHG_NO_OVERSHOOT_ENA_N 0x02
48#define MAIN_CH_DET 0x01
49#define MAIN_CH_CV_ON 0x04
50#define USB_CH_CV_ON 0x08
51#define VBUS_DET_DBNC100 0x02
52#define VBUS_DET_DBNC1 0x01
53#define OTP_ENABLE_WD 0x01
54
55#define MAIN_CH_INPUT_CURR_SHIFT 4
56#define VBUS_IN_CURR_LIM_SHIFT 4
57
58#define LED_INDICATOR_PWM_ENA 0x01
59#define LED_INDICATOR_PWM_DIS 0x00
60#define LED_IND_CUR_5MA 0x04
61#define LED_INDICATOR_PWM_DUTY_252_256 0xBF
62
63/* HW failure constants */
64#define MAIN_CH_TH_PROT 0x02
65#define VBUS_CH_NOK 0x08
66#define USB_CH_TH_PROT 0x02
67#define VBUS_OVV_TH 0x01
68#define MAIN_CH_NOK 0x01
69#define VBUS_DET 0x80
70
71/* UsbLineStatus register bit masks */
72#define AB8500_USB_LINK_STATUS 0x78
73#define AB8500_STD_HOST_SUSP 0x18
74
75/* Watchdog timeout constant */
76#define WD_TIMER 0x30 /* 4min */
77#define WD_KICK_INTERVAL (60 * HZ)
78
79/* Lowest charger voltage is 3.39V -> 0x4E */
80#define LOW_VOLT_REG 0x4E
81
f8e96dff
JB		 82/* Step up/down delay in us */
83#define STEP_UDELAY 1000
84
84edbeea
AM		 85/* UsbLineStatus register - usb types */
86enum ab8500_charger_link_status {
87 USB_STAT_NOT_CONFIGURED,
88 USB_STAT_STD_HOST_NC,
89 USB_STAT_STD_HOST_C_NS,
90 USB_STAT_STD_HOST_C_S,
91 USB_STAT_HOST_CHG_NM,
92 USB_STAT_HOST_CHG_HS,
93 USB_STAT_HOST_CHG_HS_CHIRP,
94 USB_STAT_DEDICATED_CHG,
95 USB_STAT_ACA_RID_A,
96 USB_STAT_ACA_RID_B,
97 USB_STAT_ACA_RID_C_NM,
98 USB_STAT_ACA_RID_C_HS,
99 USB_STAT_ACA_RID_C_HS_CHIRP,
100 USB_STAT_HM_IDGND,
101 USB_STAT_RESERVED,
102 USB_STAT_NOT_VALID_LINK,
103};
104
105enum ab8500_usb_state {
106 AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */
107 AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */
108 AB8500_BM_USB_STATE_CONFIGURED,
109 AB8500_BM_USB_STATE_SUSPEND,
110 AB8500_BM_USB_STATE_RESUME,
111 AB8500_BM_USB_STATE_MAX,
112};
113
114/* VBUS input current limits supported in AB8500 in mA */
115#define USB_CH_IP_CUR_LVL_0P05 50
116#define USB_CH_IP_CUR_LVL_0P09 98
117#define USB_CH_IP_CUR_LVL_0P19 193
118#define USB_CH_IP_CUR_LVL_0P29 290
119#define USB_CH_IP_CUR_LVL_0P38 380
120#define USB_CH_IP_CUR_LVL_0P45 450
121#define USB_CH_IP_CUR_LVL_0P5 500
122#define USB_CH_IP_CUR_LVL_0P6 600
123#define USB_CH_IP_CUR_LVL_0P7 700
124#define USB_CH_IP_CUR_LVL_0P8 800
125#define USB_CH_IP_CUR_LVL_0P9 900
126#define USB_CH_IP_CUR_LVL_1P0 1000
127#define USB_CH_IP_CUR_LVL_1P1 1100
128#define USB_CH_IP_CUR_LVL_1P3 1300
129#define USB_CH_IP_CUR_LVL_1P4 1400
130#define USB_CH_IP_CUR_LVL_1P5 1500
131
132#define VBAT_TRESH_IP_CUR_RED 3800
133
134#define to_ab8500_charger_usb_device_info(x) container_of((x), \
135 struct ab8500_charger, usb_chg)
136#define to_ab8500_charger_ac_device_info(x) container_of((x), \
137 struct ab8500_charger, ac_chg)
138
139/**
140 * struct ab8500_charger_interrupts - ab8500 interupts
141 * @name: name of the interrupt
142 * @isr function pointer to the isr
143 */
144struct ab8500_charger_interrupts {
145 char *name;
146 irqreturn_t (*isr)(int irq, void *data);
147};
148
149struct ab8500_charger_info {
150 int charger_connected;
151 int charger_online;
152 int charger_voltage;
153 int cv_active;
154 bool wd_expired;
155};
156
157struct ab8500_charger_event_flags {
158 bool mainextchnotok;
159 bool main_thermal_prot;
160 bool usb_thermal_prot;
161 bool vbus_ovv;
162 bool usbchargernotok;
163 bool chgwdexp;
164 bool vbus_collapse;
165};
166
167struct ab8500_charger_usb_state {
168 bool usb_changed;
169 int usb_current;
170 enum ab8500_usb_state state;
171 spinlock_t usb_lock;
172};
173
174/**
175 * struct ab8500_charger - ab8500 Charger device information
176 * @dev: Pointer to the structure device
177 * @max_usb_in_curr: Max USB charger input current
178 * @vbus_detected: VBUS detected
179 * @vbus_detected_start:
180 * VBUS detected during startup
181 * @ac_conn: This will be true when the AC charger has been plugged
182 * @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC
183 * charger is enabled
184 * @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB
185 * charger is enabled
186 * @vbat Battery voltage
187 * @old_vbat Previously measured battery voltage
188 * @autopower Indicate if we should have automatic pwron after pwrloss
4aef72db 189 * @autopower_cfg platform specific power config support for "pwron after pwrloss"
84edbeea
AM		 190 * @parent: Pointer to the struct ab8500
191 * @gpadc: Pointer to the struct gpadc
b0284de0 192 * @bm: Platform specific battery management information
84edbeea
AM		 193 * @flags: Structure for information about events triggered
194 * @usb_state: Structure for usb stack information
195 * @ac_chg: AC charger power supply
196 * @usb_chg: USB charger power supply
197 * @ac: Structure that holds the AC charger properties
198 * @usb: Structure that holds the USB charger properties
199 * @regu: Pointer to the struct regulator
200 * @charger_wq: Work queue for the IRQs and checking HW state
201 * @check_vbat_work Work for checking vbat threshold to adjust vbus current
202 * @check_hw_failure_work: Work for checking HW state
203 * @check_usbchgnotok_work: Work for checking USB charger not ok status
204 * @kick_wd_work: Work for kicking the charger watchdog in case
205 * of ABB rev 1.* due to the watchog logic bug
206 * @ac_work: Work for checking AC charger connection
207 * @detect_usb_type_work: Work for detecting the USB type connected
208 * @usb_link_status_work: Work for checking the new USB link status
209 * @usb_state_changed_work: Work for checking USB state
210 * @check_main_thermal_prot_work:
211 * Work for checking Main thermal status
212 * @check_usb_thermal_prot_work:
213 * Work for checking USB thermal status
214 */
215struct ab8500_charger {
216 struct device *dev;
217 int max_usb_in_curr;
218 bool vbus_detected;
219 bool vbus_detected_start;
220 bool ac_conn;
221 bool vddadc_en_ac;
222 bool vddadc_en_usb;
223 int vbat;
224 int old_vbat;
225 bool autopower;
4aef72db 226 bool autopower_cfg;
84edbeea
AM		 227 struct ab8500 *parent;
228 struct ab8500_gpadc *gpadc;
b0284de0 229 struct abx500_bm_data *bm;
84edbeea
AM		 230 struct ab8500_charger_event_flags flags;
231 struct ab8500_charger_usb_state usb_state;
232 struct ux500_charger ac_chg;
233 struct ux500_charger usb_chg;
234 struct ab8500_charger_info ac;
235 struct ab8500_charger_info usb;
236 struct regulator *regu;
237 struct workqueue_struct *charger_wq;
238 struct delayed_work check_vbat_work;
239 struct delayed_work check_hw_failure_work;
240 struct delayed_work check_usbchgnotok_work;
241 struct delayed_work kick_wd_work;
242 struct work_struct ac_work;
243 struct work_struct detect_usb_type_work;
244 struct work_struct usb_link_status_work;
245 struct work_struct usb_state_changed_work;
246 struct work_struct check_main_thermal_prot_work;
247 struct work_struct check_usb_thermal_prot_work;
efd71c89 248 struct usb_phy *usb_phy;
84edbeea
AM		 249 struct notifier_block nb;
250};
251
252/* AC properties */
253static enum power_supply_property ab8500_charger_ac_props[] = {
254 POWER_SUPPLY_PROP_HEALTH,
255 POWER_SUPPLY_PROP_PRESENT,
256 POWER_SUPPLY_PROP_ONLINE,
257 POWER_SUPPLY_PROP_VOLTAGE_NOW,
258 POWER_SUPPLY_PROP_VOLTAGE_AVG,
259 POWER_SUPPLY_PROP_CURRENT_NOW,
260};
261
262/* USB properties */
263static enum power_supply_property ab8500_charger_usb_props[] = {
264 POWER_SUPPLY_PROP_HEALTH,
265 POWER_SUPPLY_PROP_CURRENT_AVG,
266 POWER_SUPPLY_PROP_PRESENT,
267 POWER_SUPPLY_PROP_ONLINE,
268 POWER_SUPPLY_PROP_VOLTAGE_NOW,
269 POWER_SUPPLY_PROP_VOLTAGE_AVG,
270 POWER_SUPPLY_PROP_CURRENT_NOW,
271};
272
defbfa9c
POH		 273/*
274 * Function for enabling and disabling sw fallback mode
275 * should always be disabled when no charger is connected.
84edbeea 276 */
defbfa9c
POH		 277static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di,
278 bool fallback)
84edbeea
AM		 279{
280 u8 reg;
281 int ret;
282
defbfa9c 283 dev_dbg(di->dev, "SW Fallback: %d\n", fallback);
84edbeea 284
defbfa9c 285 /* read the register containing fallback bit */
84edbeea
AM		 286 ret = abx500_get_register_interruptible(di->dev, 0x15, 0x00, &reg);
287 if (ret) {
288 dev_err(di->dev, "%d write failed\n", __LINE__);
289 return;
290 }
291
292 /* enable the OPT emulation registers */
293 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
294 if (ret) {
295 dev_err(di->dev, "%d write failed\n", __LINE__);
296 return;
297 }
298
defbfa9c 299 if (fallback)
84edbeea
AM		 300 reg |= 0x8;
301 else
302 reg &= ~0x8;
303
defbfa9c 304 /* write back the changed fallback bit value to register */
84edbeea
AM		 305 ret = abx500_set_register_interruptible(di->dev, 0x15, 0x00, reg);
306 if (ret) {
307 dev_err(di->dev, "%d write failed\n", __LINE__);
308 return;
309 }
310
311 /* disable the set OTP registers again */
312 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
313 if (ret) {
314 dev_err(di->dev, "%d write failed\n", __LINE__);
315 return;
316 }
317}
318
319/**
320 * ab8500_power_supply_changed - a wrapper with local extentions for
321 * power_supply_changed
322 * @di: pointer to the ab8500_charger structure
323 * @psy: pointer to power_supply_that have changed.
324 *
325 */
326static void ab8500_power_supply_changed(struct ab8500_charger *di,
327 struct power_supply *psy)
328{
4aef72db 329 if (di->autopower_cfg) {
84edbeea
AM		 330 if (!di->usb.charger_connected &&
331 !di->ac.charger_connected &&
332 di->autopower) {
333 di->autopower = false;
defbfa9c 334 ab8500_enable_disable_sw_fallback(di, false);
84edbeea
AM		 335 } else if (!di->autopower &&
336 (di->ac.charger_connected ||
337 di->usb.charger_connected)) {
338 di->autopower = true;
defbfa9c 339 ab8500_enable_disable_sw_fallback(di, true);
84edbeea
AM		 340 }
341 }
342 power_supply_changed(psy);
343}
344
345static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
346 bool connected)
347{
348 if (connected != di->usb.charger_connected) {
349 dev_dbg(di->dev, "USB connected:%i\n", connected);
350 di->usb.charger_connected = connected;
351 sysfs_notify(&di->usb_chg.psy.dev->kobj, NULL, "present");
352 }
353}
354
355/**
356 * ab8500_charger_get_ac_voltage() - get ac charger voltage
357 * @di: pointer to the ab8500_charger structure
358 *
359 * Returns ac charger voltage (on success)
360 */
361static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
362{
363 int vch;
364
365 /* Only measure voltage if the charger is connected */
366 if (di->ac.charger_connected) {
367 vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V);
368 if (vch < 0)
369 dev_err(di->dev, "%s gpadc conv failed,\n", __func__);
370 } else {
371 vch = 0;
372 }
373 return vch;
374}
375
376/**
377 * ab8500_charger_ac_cv() - check if the main charger is in CV mode
378 * @di: pointer to the ab8500_charger structure
379 *
380 * Returns ac charger CV mode (on success) else error code
381 */
382static int ab8500_charger_ac_cv(struct ab8500_charger *di)
383{
384 u8 val;
385 int ret = 0;
386
387 /* Only check CV mode if the charger is online */
388 if (di->ac.charger_online) {
389 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
390 AB8500_CH_STATUS1_REG, &val);
391 if (ret < 0) {
392 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
393 return 0;
394 }
395
396 if (val & MAIN_CH_CV_ON)
397 ret = 1;
398 else
399 ret = 0;
400 }
401
402 return ret;
403}
404
405/**
406 * ab8500_charger_get_vbus_voltage() - get vbus voltage
407 * @di: pointer to the ab8500_charger structure
408 *
409 * This function returns the vbus voltage.
410 * Returns vbus voltage (on success)
411 */
412static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
413{
414 int vch;
415
416 /* Only measure voltage if the charger is connected */
417 if (di->usb.charger_connected) {
418 vch = ab8500_gpadc_convert(di->gpadc, VBUS_V);
419 if (vch < 0)
420 dev_err(di->dev, "%s gpadc conv failed\n", __func__);
421 } else {
422 vch = 0;
423 }
424 return vch;
425}
426
427/**
428 * ab8500_charger_get_usb_current() - get usb charger current
429 * @di: pointer to the ab8500_charger structure
430 *
431 * This function returns the usb charger current.
432 * Returns usb current (on success) and error code on failure
433 */
434static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
435{
436 int ich;
437
438 /* Only measure current if the charger is online */
439 if (di->usb.charger_online) {
440 ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C);
441 if (ich < 0)
442 dev_err(di->dev, "%s gpadc conv failed\n", __func__);
443 } else {
444 ich = 0;
445 }
446 return ich;
447}
448
449/**
450 * ab8500_charger_get_ac_current() - get ac charger current
451 * @di: pointer to the ab8500_charger structure
452 *
453 * This function returns the ac charger current.
454 * Returns ac current (on success) and error code on failure.
455 */
456static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
457{
458 int ich;
459
460 /* Only measure current if the charger is online */
461 if (di->ac.charger_online) {
462 ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C);
463 if (ich < 0)
464 dev_err(di->dev, "%s gpadc conv failed\n", __func__);
465 } else {
466 ich = 0;
467 }
468 return ich;
469}
470
471/**
472 * ab8500_charger_usb_cv() - check if the usb charger is in CV mode
473 * @di: pointer to the ab8500_charger structure
474 *
475 * Returns ac charger CV mode (on success) else error code
476 */
477static int ab8500_charger_usb_cv(struct ab8500_charger *di)
478{
479 int ret;
480 u8 val;
481
482 /* Only check CV mode if the charger is online */
483 if (di->usb.charger_online) {
484 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
485 AB8500_CH_USBCH_STAT1_REG, &val);
486 if (ret < 0) {
487 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
488 return 0;
489 }
490
491 if (val & USB_CH_CV_ON)
492 ret = 1;
493 else
494 ret = 0;
495 } else {
496 ret = 0;
497 }
498
499 return ret;
500}
501
502/**
503 * ab8500_charger_detect_chargers() - Detect the connected chargers
504 * @di: pointer to the ab8500_charger structure
505 *
506 * Returns the type of charger connected.
507 * For USB it will not mean we can actually charge from it
508 * but that there is a USB cable connected that we have to
509 * identify. This is used during startup when we don't get
510 * interrupts of the charger detection
511 *
512 * Returns an integer value, that means,
513 * NO_PW_CONN no power supply is connected
514 * AC_PW_CONN if the AC power supply is connected
515 * USB_PW_CONN if the USB power supply is connected
516 * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected
517 */
518static int ab8500_charger_detect_chargers(struct ab8500_charger *di)
519{
520 int result = NO_PW_CONN;
521 int ret;
522 u8 val;
523
524 /* Check for AC charger */
525 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
526 AB8500_CH_STATUS1_REG, &val);
527 if (ret < 0) {
528 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
529 return ret;
530 }
531
532 if (val & MAIN_CH_DET)
533 result = AC_PW_CONN;
534
535 /* Check for USB charger */
536 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
537 AB8500_CH_USBCH_STAT1_REG, &val);
538 if (ret < 0) {
539 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
540 return ret;
541 }
542
543 if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100))
544 result |= USB_PW_CONN;
545
546 return result;
547}
548
549/**
550 * ab8500_charger_max_usb_curr() - get the max curr for the USB type
551 * @di: pointer to the ab8500_charger structure
552 * @link_status: the identified USB type
553 *
554 * Get the maximum current that is allowed to be drawn from the host
555 * based on the USB type.
556 * Returns error code in case of failure else 0 on success
557 */
558static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
559 enum ab8500_charger_link_status link_status)
560{
561 int ret = 0;
562
563 switch (link_status) {
564 case USB_STAT_STD_HOST_NC:
565 case USB_STAT_STD_HOST_C_NS:
566 case USB_STAT_STD_HOST_C_S:
567 dev_dbg(di->dev, "USB Type - Standard host is "
568 "detected through USB driver\n");
569 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P09;
570 break;
571 case USB_STAT_HOST_CHG_HS_CHIRP:
572 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
573 break;
574 case USB_STAT_HOST_CHG_HS:
575 case USB_STAT_ACA_RID_C_HS:
576 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P9;
577 break;
578 case USB_STAT_ACA_RID_A:
579 /*
580 * Dedicated charger level minus maximum current accessory
581 * can consume (300mA). Closest level is 1100mA
582 */
583 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P1;
584 break;
585 case USB_STAT_ACA_RID_B:
586 /*
587 * Dedicated charger level minus 120mA (20mA for ACA and
588 * 100mA for potential accessory). Closest level is 1300mA
589 */
590 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P3;
591 break;
592 case USB_STAT_DEDICATED_CHG:
593 case USB_STAT_HOST_CHG_NM:
594 case USB_STAT_ACA_RID_C_HS_CHIRP:
595 case USB_STAT_ACA_RID_C_NM:
596 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5;
597 break;
598 case USB_STAT_RESERVED:
599 /*
600 * This state is used to indicate that VBUS has dropped below
601 * the detection level 4 times in a row. This is due to the
602 * charger output current is set to high making the charger
603 * voltage collapse. This have to be propagated through to
604 * chargalg. This is done using the property
605 * POWER_SUPPLY_PROP_CURRENT_AVG = 1
606 */
607 di->flags.vbus_collapse = true;
608 dev_dbg(di->dev, "USB Type - USB_STAT_RESERVED "
609 "VBUS has collapsed\n");
610 ret = -1;
611 break;
612 case USB_STAT_HM_IDGND:
613 case USB_STAT_NOT_CONFIGURED:
614 case USB_STAT_NOT_VALID_LINK:
615 dev_err(di->dev, "USB Type - Charging not allowed\n");
616 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
617 ret = -ENXIO;
618 break;
619 default:
620 dev_err(di->dev, "USB Type - Unknown\n");
621 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
622 ret = -ENXIO;
623 break;
624 };
625
626 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
627 link_status, di->max_usb_in_curr);
628
629 return ret;
630}
631
632/**
633 * ab8500_charger_read_usb_type() - read the type of usb connected
634 * @di: pointer to the ab8500_charger structure
635 *
636 * Detect the type of the plugged USB
637 * Returns error code in case of failure else 0 on success
638 */
639static int ab8500_charger_read_usb_type(struct ab8500_charger *di)
640{
641 int ret;
642 u8 val;
643
644 ret = abx500_get_register_interruptible(di->dev,
645 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val);
646 if (ret < 0) {
647 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
648 return ret;
649 }
650 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
651 AB8500_USB_LINE_STAT_REG, &val);
652 if (ret < 0) {
653 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
654 return ret;
655 }
656
657 /* get the USB type */
658 val = (val & AB8500_USB_LINK_STATUS) >> 3;
659 ret = ab8500_charger_max_usb_curr(di,
660 (enum ab8500_charger_link_status) val);
661
662 return ret;
663}
664
665/**
666 * ab8500_charger_detect_usb_type() - get the type of usb connected
667 * @di: pointer to the ab8500_charger structure
668 *
669 * Detect the type of the plugged USB
670 * Returns error code in case of failure else 0 on success
671 */
672static int ab8500_charger_detect_usb_type(struct ab8500_charger *di)
673{
674 int i, ret;
675 u8 val;
676
677 /*
678 * On getting the VBUS rising edge detect interrupt there
679 * is a 250ms delay after which the register UsbLineStatus
680 * is filled with valid data.
681 */
682 for (i = 0; i < 10; i++) {
683 msleep(250);
684 ret = abx500_get_register_interruptible(di->dev,
685 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG,
686 &val);
687 if (ret < 0) {
688 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
689 return ret;
690 }
691 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
692 AB8500_USB_LINE_STAT_REG, &val);
693 if (ret < 0) {
694 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
695 return ret;
696 }
697 /*
698 * Until the IT source register is read the UsbLineStatus
699 * register is not updated, hence doing the same
700 * Revisit this:
701 */
702
703 /* get the USB type */
704 val = (val & AB8500_USB_LINK_STATUS) >> 3;
705 if (val)
706 break;
707 }
708 ret = ab8500_charger_max_usb_curr(di,
709 (enum ab8500_charger_link_status) val);
710
711 return ret;
712}
713
714/*
715 * This array maps the raw hex value to charger voltage used by the AB8500
716 * Values taken from the UM0836
717 */
718static int ab8500_charger_voltage_map[] = {
719 3500 ,
720 3525 ,
721 3550 ,
722 3575 ,
723 3600 ,
724 3625 ,
725 3650 ,
726 3675 ,
727 3700 ,
728 3725 ,
729 3750 ,
730 3775 ,
731 3800 ,
732 3825 ,
733 3850 ,
734 3875 ,
735 3900 ,
736 3925 ,
737 3950 ,
738 3975 ,
739 4000 ,
740 4025 ,
741 4050 ,
742 4060 ,
743 4070 ,
744 4080 ,
745 4090 ,
746 4100 ,
747 4110 ,
748 4120 ,
749 4130 ,
750 4140 ,
751 4150 ,
752 4160 ,
753 4170 ,
754 4180 ,
755 4190 ,
756 4200 ,
757 4210 ,
758 4220 ,
759 4230 ,
760 4240 ,
761 4250 ,
762 4260 ,
763 4270 ,
764 4280 ,
765 4290 ,
766 4300 ,
767 4310 ,
768 4320 ,
769 4330 ,
770 4340 ,
771 4350 ,
772 4360 ,
773 4370 ,
774 4380 ,
775 4390 ,
776 4400 ,
777 4410 ,
778 4420 ,
779 4430 ,
780 4440 ,
781 4450 ,
782 4460 ,
783 4470 ,
784 4480 ,
785 4490 ,
786 4500 ,
787 4510 ,
788 4520 ,
789 4530 ,
790 4540 ,
791 4550 ,
792 4560 ,
793 4570 ,
794 4580 ,
795 4590 ,
796 4600 ,
797};
798
799/*
800 * This array maps the raw hex value to charger current used by the AB8500
801 * Values taken from the UM0836
802 */
803static int ab8500_charger_current_map[] = {
804 100 ,
805 200 ,
806 300 ,
807 400 ,
808 500 ,
809 600 ,
810 700 ,
811 800 ,
812 900 ,
813 1000 ,
814 1100 ,
815 1200 ,
816 1300 ,
817 1400 ,
818 1500 ,
819};
820
821/*
822 * This array maps the raw hex value to VBUS input current used by the AB8500
823 * Values taken from the UM0836
824 */
825static int ab8500_charger_vbus_in_curr_map[] = {
826 USB_CH_IP_CUR_LVL_0P05,
827 USB_CH_IP_CUR_LVL_0P09,
828 USB_CH_IP_CUR_LVL_0P19,
829 USB_CH_IP_CUR_LVL_0P29,
830 USB_CH_IP_CUR_LVL_0P38,
831 USB_CH_IP_CUR_LVL_0P45,
832 USB_CH_IP_CUR_LVL_0P5,
833 USB_CH_IP_CUR_LVL_0P6,
834 USB_CH_IP_CUR_LVL_0P7,
835 USB_CH_IP_CUR_LVL_0P8,
836 USB_CH_IP_CUR_LVL_0P9,
837 USB_CH_IP_CUR_LVL_1P0,
838 USB_CH_IP_CUR_LVL_1P1,
839 USB_CH_IP_CUR_LVL_1P3,
840 USB_CH_IP_CUR_LVL_1P4,
841 USB_CH_IP_CUR_LVL_1P5,
842};
843
844static int ab8500_voltage_to_regval(int voltage)
845{
846 int i;
847
848 /* Special case for voltage below 3.5V */
849 if (voltage < ab8500_charger_voltage_map[0])
850 return LOW_VOLT_REG;
851
852 for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) {
853 if (voltage < ab8500_charger_voltage_map[i])
854 return i - 1;
855 }
856
857 /* If not last element, return error */
858 i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1;
859 if (voltage == ab8500_charger_voltage_map[i])
860 return i;
861 else
862 return -1;
863}
864
865static int ab8500_current_to_regval(int curr)
866{
867 int i;
868
869 if (curr < ab8500_charger_current_map[0])
870 return 0;
871
872 for (i = 0; i < ARRAY_SIZE(ab8500_charger_current_map); i++) {
873 if (curr < ab8500_charger_current_map[i])
874 return i - 1;
875 }
876
877 /* If not last element, return error */
878 i = ARRAY_SIZE(ab8500_charger_current_map) - 1;
879 if (curr == ab8500_charger_current_map[i])
880 return i;
881 else
882 return -1;
883}
884
885static int ab8500_vbus_in_curr_to_regval(int curr)
886{
887 int i;
888
889 if (curr < ab8500_charger_vbus_in_curr_map[0])
890 return 0;
891
892 for (i = 0; i < ARRAY_SIZE(ab8500_charger_vbus_in_curr_map); i++) {
893 if (curr < ab8500_charger_vbus_in_curr_map[i])
894 return i - 1;
895 }
896
897 /* If not last element, return error */
898 i = ARRAY_SIZE(ab8500_charger_vbus_in_curr_map) - 1;
899 if (curr == ab8500_charger_vbus_in_curr_map[i])
900 return i;
901 else
902 return -1;
903}
904
905/**
906 * ab8500_charger_get_usb_cur() - get usb current
907 * @di: pointer to the ab8500_charger structre
908 *
909 * The usb stack provides the maximum current that can be drawn from
910 * the standard usb host. This will be in mA.
911 * This function converts current in mA to a value that can be written
912 * to the register. Returns -1 if charging is not allowed
913 */
914static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
915{
916 switch (di->usb_state.usb_current) {
917 case 100:
918 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P09;
919 break;
920 case 200:
921 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P19;
922 break;
923 case 300:
924 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P29;
925 break;
926 case 400:
927 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P38;
928 break;
929 case 500:
930 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
931 break;
932 default:
933 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
934 return -1;
935 break;
936 };
937 return 0;
938}
939
f8e96dff
JB		 940/**
941 * ab8500_charger_set_current() - set charger current
942 * @di: pointer to the ab8500_charger structure
943 * @ich: charger current, in mA
944 * @reg: select what charger register to set
945 *
946 * Set charger current.
947 * There is no state machine in the AB to step up/down the charger
948 * current to avoid dips and spikes on MAIN, VBUS and VBAT when
949 * charging is started. Instead we need to implement
950 * this charger current step-up/down here.
951 * Returns error code in case of failure else 0(on success)
952 */
953static int ab8500_charger_set_current(struct ab8500_charger *di,
954 int ich, int reg)
955{
956 int ret, i;
957 int curr_index, prev_curr_index, shift_value;
958 u8 reg_value;
959
960 switch (reg) {
961 case AB8500_MCH_IPT_CURLVL_REG:
962 shift_value = MAIN_CH_INPUT_CURR_SHIFT;
963 curr_index = ab8500_current_to_regval(ich);
964 break;
965 case AB8500_USBCH_IPT_CRNTLVL_REG:
966 shift_value = VBUS_IN_CURR_LIM_SHIFT;
967 curr_index = ab8500_vbus_in_curr_to_regval(ich);
968 break;
969 case AB8500_CH_OPT_CRNTLVL_REG:
970 shift_value = 0;
971 curr_index = ab8500_current_to_regval(ich);
972 break;
973 default:
974 dev_err(di->dev, "%s current register not valid\n", __func__);
975 return -ENXIO;
976 }
977
978 if (curr_index < 0) {
979 dev_err(di->dev, "requested current limit out-of-range\n");
980 return -ENXIO;
981 }
982
983 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
984 reg, &reg_value);
985 if (ret < 0) {
986 dev_err(di->dev, "%s read failed\n", __func__);
987 return ret;
988 }
989 prev_curr_index = (reg_value >> shift_value);
990
991 /* only update current if it's been changed */
992 if (prev_curr_index == curr_index)
993 return 0;
994
995 dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n",
996 __func__, ich, reg);
997
998 if (prev_curr_index > curr_index) {
999 for (i = prev_curr_index - 1; i >= curr_index; i--) {
1000 ret = abx500_set_register_interruptible(di->dev,
1001 AB8500_CHARGER, reg, (u8) i << shift_value);
1002 if (ret) {
1003 dev_err(di->dev, "%s write failed\n", __func__);
1004 return ret;
1005 }
1006 usleep_range(STEP_UDELAY, STEP_UDELAY * 2);
1007 }
1008 } else {
1009 for (i = prev_curr_index + 1; i <= curr_index; i++) {
1010 ret = abx500_set_register_interruptible(di->dev,
1011 AB8500_CHARGER, reg, (u8) i << shift_value);
1012 if (ret) {
1013 dev_err(di->dev, "%s write failed\n", __func__);
1014 return ret;
1015 }
1016 usleep_range(STEP_UDELAY, STEP_UDELAY * 2);
1017 }
1018 }
1019 return ret;
1020}
1021
84edbeea
AM		 1022/**
1023 * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
1024 * @di: pointer to the ab8500_charger structure
1025 * @ich_in: charger input current limit
1026 *
1027 * Sets the current that can be drawn from the USB host
1028 * Returns error code in case of failure else 0(on success)
1029 */
1030static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
1031 int ich_in)
1032{
84edbeea
AM		 1033 int min_value;
1034
1035 /* We should always use to lowest current limit */
b0284de0 1036 min_value = min(di->bm->chg_params->usb_curr_max, ich_in);
84edbeea
AM		 1037
1038 switch (min_value) {
1039 case 100:
1040 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1041 min_value = USB_CH_IP_CUR_LVL_0P05;
1042 break;
1043 case 500:
1044 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1045 min_value = USB_CH_IP_CUR_LVL_0P45;
1046 break;
1047 default:
1048 break;
1049 }
1050
f8e96dff
JB		 1051 return ab8500_charger_set_current(di, min_value,
1052 AB8500_USBCH_IPT_CRNTLVL_REG);
1053}
84edbeea 1054
f8e96dff
JB		 1055/**
1056 * ab8500_charger_set_main_in_curr() - set main charger input current
1057 * @di: pointer to the ab8500_charger structure
1058 * @ich_in: input charger current, in mA
1059 *
1060 * Set main charger input current.
1061 * Returns error code in case of failure else 0(on success)
1062 */
1063static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di,
1064 int ich_in)
1065{
1066 return ab8500_charger_set_current(di, ich_in,
1067 AB8500_MCH_IPT_CURLVL_REG);
1068}
84edbeea 1069
f8e96dff
JB		 1070/**
1071 * ab8500_charger_set_output_curr() - set charger output current
1072 * @di: pointer to the ab8500_charger structure
1073 * @ich_out: output charger current, in mA
1074 *
1075 * Set charger output current.
1076 * Returns error code in case of failure else 0(on success)
1077 */
1078static int ab8500_charger_set_output_curr(struct ab8500_charger *di,
1079 int ich_out)
1080{
1081 return ab8500_charger_set_current(di, ich_out,
1082 AB8500_CH_OPT_CRNTLVL_REG);
84edbeea
AM		 1083}
1084
1085/**
1086 * ab8500_charger_led_en() - turn on/off chargign led
1087 * @di: pointer to the ab8500_charger structure
1088 * @on: flag to turn on/off the chargign led
1089 *
1090 * Power ON/OFF charging LED indication
1091 * Returns error code in case of failure else 0(on success)
1092 */
1093static int ab8500_charger_led_en(struct ab8500_charger *di, int on)
1094{
1095 int ret;
1096
1097 if (on) {
1098 /* Power ON charging LED indicator, set LED current to 5mA */
1099 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1100 AB8500_LED_INDICATOR_PWM_CTRL,
1101 (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA));
1102 if (ret) {
1103 dev_err(di->dev, "Power ON LED failed\n");
1104 return ret;
1105 }
1106 /* LED indicator PWM duty cycle 252/256 */
1107 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1108 AB8500_LED_INDICATOR_PWM_DUTY,
1109 LED_INDICATOR_PWM_DUTY_252_256);
1110 if (ret) {
1111 dev_err(di->dev, "Set LED PWM duty cycle failed\n");
1112 return ret;
1113 }
1114 } else {
1115 /* Power off charging LED indicator */
1116 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1117 AB8500_LED_INDICATOR_PWM_CTRL,
1118 LED_INDICATOR_PWM_DIS);
1119 if (ret) {
1120 dev_err(di->dev, "Power-off LED failed\n");
1121 return ret;
1122 }
1123 }
1124
1125 return ret;
1126}
1127
1128/**
1129 * ab8500_charger_ac_en() - enable or disable ac charging
1130 * @di: pointer to the ab8500_charger structure
1131 * @enable: enable/disable flag
1132 * @vset: charging voltage
1133 * @iset: charging current
1134 *
1135 * Enable/Disable AC/Mains charging and turns on/off the charging led
1136 * respectively.
1137 **/
1138static int ab8500_charger_ac_en(struct ux500_charger *charger,
1139 int enable, int vset, int iset)
1140{
1141 int ret;
1142 int volt_index;
1143 int curr_index;
1144 int input_curr_index;
1145 u8 overshoot = 0;
1146
1147 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1148
1149 if (enable) {
1150 /* Check if AC is connected */
1151 if (!di->ac.charger_connected) {
1152 dev_err(di->dev, "AC charger not connected\n");
1153 return -ENXIO;
1154 }
1155
1156 /* Enable AC charging */
1157 dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset);
1158
1159 /*
1160 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1161 * will be triggered everytime we enable the VDD ADC supply.
1162 * This will turn off charging for a short while.
1163 * It can be avoided by having the supply on when
1164 * there is a charger enabled. Normally the VDD ADC supply
1165 * is enabled everytime a GPADC conversion is triggered. We will
1166 * force it to be enabled from this driver to have
1167 * the GPADC module independant of the AB8500 chargers
1168 */
1169 if (!di->vddadc_en_ac) {
1170 regulator_enable(di->regu);
1171 di->vddadc_en_ac = true;
1172 }
1173
1174 /* Check if the requested voltage or current is valid */
1175 volt_index = ab8500_voltage_to_regval(vset);
1176 curr_index = ab8500_current_to_regval(iset);
1177 input_curr_index = ab8500_current_to_regval(
b0284de0 1178 di->bm->chg_params->ac_curr_max);
84edbeea
AM		 1179 if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
1180 dev_err(di->dev,
1181 "Charger voltage or current too high, "
1182 "charging not started\n");
1183 return -ENXIO;
1184 }
1185
1186 /* ChVoltLevel: maximum battery charging voltage */
1187 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1188 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1189 if (ret) {
1190 dev_err(di->dev, "%s write failed\n", __func__);
1191 return ret;
1192 }
1193 /* MainChInputCurr: current that can be drawn from the charger*/
f8e96dff 1194 ret = ab8500_charger_set_main_in_curr(di,
b0284de0 1195 di->bm->chg_params->ac_curr_max);
84edbeea 1196 if (ret) {
f8e96dff
JB		 1197 dev_err(di->dev, "%s Failed to set MainChInputCurr\n",
1198 __func__);
84edbeea
AM		 1199 return ret;
1200 }
1201 /* ChOutputCurentLevel: protected output current */
f8e96dff 1202 ret = ab8500_charger_set_output_curr(di, iset);
84edbeea 1203 if (ret) {
f8e96dff
JB		 1204 dev_err(di->dev, "%s "
1205 "Failed to set ChOutputCurentLevel\n",
1206 __func__);
84edbeea
AM		 1207 return ret;
1208 }
1209
1210 /* Check if VBAT overshoot control should be enabled */
b0284de0 1211 if (!di->bm->enable_overshoot)
84edbeea
AM		 1212 overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;
1213
1214 /* Enable Main Charger */
1215 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1216 AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot);
1217 if (ret) {
1218 dev_err(di->dev, "%s write failed\n", __func__);
1219 return ret;
1220 }
1221
1222 /* Power on charging LED indication */
1223 ret = ab8500_charger_led_en(di, true);
1224 if (ret < 0)
1225 dev_err(di->dev, "failed to enable LED\n");
1226
1227 di->ac.charger_online = 1;
1228 } else {
1229 /* Disable AC charging */
1230 if (is_ab8500_1p1_or_earlier(di->parent)) {
1231 /*
1232 * For ABB revision 1.0 and 1.1 there is a bug in the
1233 * watchdog logic. That means we have to continously
1234 * kick the charger watchdog even when no charger is
1235 * connected. This is only valid once the AC charger
1236 * has been enabled. This is a bug that is not handled
1237 * by the algorithm and the watchdog have to be kicked
1238 * by the charger driver when the AC charger
1239 * is disabled
1240 */
1241 if (di->ac_conn) {
1242 queue_delayed_work(di->charger_wq,
1243 &di->kick_wd_work,
1244 round_jiffies(WD_KICK_INTERVAL));
1245 }
1246
1247 /*
1248 * We can't turn off charging completely
1249 * due to a bug in AB8500 cut1.
1250 * If we do, charging will not start again.
1251 * That is why we set the lowest voltage
1252 * and current possible
1253 */
1254 ret = abx500_set_register_interruptible(di->dev,
1255 AB8500_CHARGER,
1256 AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5);
1257 if (ret) {
1258 dev_err(di->dev,
1259 "%s write failed\n", __func__);
1260 return ret;
1261 }
1262
f8e96dff 1263 ret = ab8500_charger_set_output_curr(di, 0);
84edbeea 1264 if (ret) {
f8e96dff
JB		 1265 dev_err(di->dev, "%s "
1266 "Failed to set ChOutputCurentLevel\n",
1267 __func__);
84edbeea
AM		 1268 return ret;
1269 }
1270 } else {
1271 ret = abx500_set_register_interruptible(di->dev,
1272 AB8500_CHARGER,
1273 AB8500_MCH_CTRL1, 0);
1274 if (ret) {
1275 dev_err(di->dev,
1276 "%s write failed\n", __func__);
1277 return ret;
1278 }
1279 }
1280
1281 ret = ab8500_charger_led_en(di, false);
1282 if (ret < 0)
1283 dev_err(di->dev, "failed to disable LED\n");
1284
1285 di->ac.charger_online = 0;
1286 di->ac.wd_expired = false;
1287
1288 /* Disable regulator if enabled */
1289 if (di->vddadc_en_ac) {
1290 regulator_disable(di->regu);
1291 di->vddadc_en_ac = false;
1292 }
1293
1294 dev_dbg(di->dev, "%s Disabled AC charging\n", __func__);
1295 }
1296 ab8500_power_supply_changed(di, &di->ac_chg.psy);
1297
1298 return ret;
1299}
1300
1301/**
1302 * ab8500_charger_usb_en() - enable usb charging
1303 * @di: pointer to the ab8500_charger structure
1304 * @enable: enable/disable flag
1305 * @vset: charging voltage
1306 * @ich_out: charger output current
1307 *
1308 * Enable/Disable USB charging and turns on/off the charging led respectively.
1309 * Returns error code in case of failure else 0(on success)
1310 */
1311static int ab8500_charger_usb_en(struct ux500_charger *charger,
1312 int enable, int vset, int ich_out)
1313{
1314 int ret;
1315 int volt_index;
1316 int curr_index;
1317 u8 overshoot = 0;
1318
1319 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1320
1321 if (enable) {
1322 /* Check if USB is connected */
1323 if (!di->usb.charger_connected) {
1324 dev_err(di->dev, "USB charger not connected\n");
1325 return -ENXIO;
1326 }
1327
1328 /*
1329 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1330 * will be triggered everytime we enable the VDD ADC supply.
1331 * This will turn off charging for a short while.
1332 * It can be avoided by having the supply on when
1333 * there is a charger enabled. Normally the VDD ADC supply
1334 * is enabled everytime a GPADC conversion is triggered. We will
1335 * force it to be enabled from this driver to have
1336 * the GPADC module independant of the AB8500 chargers
1337 */
1338 if (!di->vddadc_en_usb) {
1339 regulator_enable(di->regu);
1340 di->vddadc_en_usb = true;
1341 }
1342
1343 /* Enable USB charging */
1344 dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out);
1345
1346 /* Check if the requested voltage or current is valid */
1347 volt_index = ab8500_voltage_to_regval(vset);
1348 curr_index = ab8500_current_to_regval(ich_out);
1349 if (volt_index < 0 || curr_index < 0) {
1350 dev_err(di->dev,
1351 "Charger voltage or current too high, "
1352 "charging not started\n");
1353 return -ENXIO;
1354 }
1355
1356 /* ChVoltLevel: max voltage upto which battery can be charged */
1357 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1358 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1359 if (ret) {
1360 dev_err(di->dev, "%s write failed\n", __func__);
1361 return ret;
1362 }
1363 /* USBChInputCurr: current that can be drawn from the usb */
1364 ret = ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr);
1365 if (ret) {
1366 dev_err(di->dev, "setting USBChInputCurr failed\n");
1367 return ret;
1368 }
1369 /* ChOutputCurentLevel: protected output current */
f8e96dff 1370 ret = ab8500_charger_set_output_curr(di, ich_out);
84edbeea 1371 if (ret) {
f8e96dff
JB		 1372 dev_err(di->dev, "%s "
1373 "Failed to set ChOutputCurentLevel\n",
1374 __func__);
84edbeea
AM		 1375 return ret;
1376 }
1377 /* Check if VBAT overshoot control should be enabled */
b0284de0 1378 if (!di->bm->enable_overshoot)
84edbeea
AM		 1379 overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;
1380
1381 /* Enable USB Charger */
1382 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1383 AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot);
1384 if (ret) {
1385 dev_err(di->dev, "%s write failed\n", __func__);
1386 return ret;
1387 }
1388
1389 /* If success power on charging LED indication */
1390 ret = ab8500_charger_led_en(di, true);
1391 if (ret < 0)
1392 dev_err(di->dev, "failed to enable LED\n");
1393
1394 queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);
1395
1396 di->usb.charger_online = 1;
1397 } else {
1398 /* Disable USB charging */
1399 ret = abx500_set_register_interruptible(di->dev,
1400 AB8500_CHARGER,
1401 AB8500_USBCH_CTRL1_REG, 0);
1402 if (ret) {
1403 dev_err(di->dev,
1404 "%s write failed\n", __func__);
1405 return ret;
1406 }
1407
1408 ret = ab8500_charger_led_en(di, false);
1409 if (ret < 0)
1410 dev_err(di->dev, "failed to disable LED\n");
1411
1412 di->usb.charger_online = 0;
1413 di->usb.wd_expired = false;
1414
1415 /* Disable regulator if enabled */
1416 if (di->vddadc_en_usb) {
1417 regulator_disable(di->regu);
1418 di->vddadc_en_usb = false;
1419 }
1420
1421 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1422
1423 /* Cancel any pending Vbat check work */
1424 if (delayed_work_pending(&di->check_vbat_work))
1425 cancel_delayed_work(&di->check_vbat_work);
1426
1427 }
1428 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1429
1430 return ret;
1431}
1432
1433/**
1434 * ab8500_charger_watchdog_kick() - kick charger watchdog
1435 * @di: pointer to the ab8500_charger structure
1436 *
1437 * Kick charger watchdog
1438 * Returns error code in case of failure else 0(on success)
1439 */
1440static int ab8500_charger_watchdog_kick(struct ux500_charger *charger)
1441{
1442 int ret;
1443 struct ab8500_charger *di;
1444
1445 if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS)
1446 di = to_ab8500_charger_ac_device_info(charger);
1447 else if (charger->psy.type == POWER_SUPPLY_TYPE_USB)
1448 di = to_ab8500_charger_usb_device_info(charger);
1449 else
1450 return -ENXIO;
1451
1452 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1453 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
1454 if (ret)
1455 dev_err(di->dev, "Failed to kick WD!\n");
1456
1457 return ret;
1458}
1459
1460/**
1461 * ab8500_charger_update_charger_current() - update charger current
1462 * @di: pointer to the ab8500_charger structure
1463 *
1464 * Update the charger output current for the specified charger
1465 * Returns error code in case of failure else 0(on success)
1466 */
1467static int ab8500_charger_update_charger_current(struct ux500_charger *charger,
1468 int ich_out)
1469{
1470 int ret;
84edbeea
AM		 1471 struct ab8500_charger *di;
1472
1473 if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS)
1474 di = to_ab8500_charger_ac_device_info(charger);
1475 else if (charger->psy.type == POWER_SUPPLY_TYPE_USB)
1476 di = to_ab8500_charger_usb_device_info(charger);
1477 else
1478 return -ENXIO;
1479
f8e96dff 1480 ret = ab8500_charger_set_output_curr(di, ich_out);
84edbeea 1481 if (ret) {
f8e96dff
JB		 1482 dev_err(di->dev, "%s "
1483 "Failed to set ChOutputCurentLevel\n",
1484 __func__);
84edbeea
AM		 1485 return ret;
1486 }
1487
1488 /* Reset the main and usb drop input current measurement counter */
1489 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1490 AB8500_CHARGER_CTRL,
1491 0x1);
1492 if (ret) {
1493 dev_err(di->dev, "%s write failed\n", __func__);
1494 return ret;
1495 }
1496
1497 return ret;
1498}
1499
1500static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
1501{
1502 struct power_supply *psy;
1503 struct power_supply *ext;
1504 struct ab8500_charger *di;
1505 union power_supply_propval ret;
1506 int i, j;
1507 bool psy_found = false;
1508 struct ux500_charger *usb_chg;
1509
1510 usb_chg = (struct ux500_charger *)data;
1511 psy = &usb_chg->psy;
1512
1513 di = to_ab8500_charger_usb_device_info(usb_chg);
1514
1515 ext = dev_get_drvdata(dev);
1516
1517 /* For all psy where the driver name appears in any supplied_to */
1518 for (i = 0; i < ext->num_supplicants; i++) {
1519 if (!strcmp(ext->supplied_to[i], psy->name))
1520 psy_found = true;
1521 }
1522
1523 if (!psy_found)
1524 return 0;
1525
1526 /* Go through all properties for the psy */
1527 for (j = 0; j < ext->num_properties; j++) {
1528 enum power_supply_property prop;
1529 prop = ext->properties[j];
1530
1531 if (ext->get_property(ext, prop, &ret))
1532 continue;
1533
1534 switch (prop) {
1535 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1536 switch (ext->type) {
1537 case POWER_SUPPLY_TYPE_BATTERY:
1538 di->vbat = ret.intval / 1000;
1539 break;
1540 default:
1541 break;
1542 }
1543 break;
1544 default:
1545 break;
1546 }
1547 }
1548 return 0;
1549}
1550
1551/**
1552 * ab8500_charger_check_vbat_work() - keep vbus current within spec
1553 * @work pointer to the work_struct structure
1554 *
1555 * Due to a asic bug it is necessary to lower the input current to the vbus
1556 * charger when charging with at some specific levels. This issue is only valid
1557 * for below a certain battery voltage. This function makes sure that the
1558 * the allowed current limit isn't exceeded.
1559 */
1560static void ab8500_charger_check_vbat_work(struct work_struct *work)
1561{
1562 int t = 10;
1563 struct ab8500_charger *di = container_of(work,
1564 struct ab8500_charger, check_vbat_work.work);
1565
1566 class_for_each_device(power_supply_class, NULL,
1567 &di->usb_chg.psy, ab8500_charger_get_ext_psy_data);
1568
1569 /* First run old_vbat is 0. */
1570 if (di->old_vbat == 0)
1571 di->old_vbat = di->vbat;
1572
1573 if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED &&
1574 di->vbat <= VBAT_TRESH_IP_CUR_RED) ||
1575 (di->old_vbat > VBAT_TRESH_IP_CUR_RED &&
1576 di->vbat > VBAT_TRESH_IP_CUR_RED))) {
1577
1578 dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d,"
1579 " old: %d\n", di->max_usb_in_curr, di->vbat,
1580 di->old_vbat);
1581 ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr);
1582 power_supply_changed(&di->usb_chg.psy);
1583 }
1584
1585 di->old_vbat = di->vbat;
1586
1587 /*
1588 * No need to check the battery voltage every second when not close to
1589 * the threshold.
1590 */
1591 if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) &&
1592 (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100)))
1593 t = 1;
1594
1595 queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ);
1596}
1597
1598/**
1599 * ab8500_charger_check_hw_failure_work() - check main charger failure
1600 * @work: pointer to the work_struct structure
1601 *
1602 * Work queue function for checking the main charger status
1603 */
1604static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
1605{
1606 int ret;
1607 u8 reg_value;
1608
1609 struct ab8500_charger *di = container_of(work,
1610 struct ab8500_charger, check_hw_failure_work.work);
1611
1612 /* Check if the status bits for HW failure is still active */
1613 if (di->flags.mainextchnotok) {
1614 ret = abx500_get_register_interruptible(di->dev,
1615 AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
1616 if (ret < 0) {
1617 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1618 return;
1619 }
1620 if (!(reg_value & MAIN_CH_NOK)) {
1621 di->flags.mainextchnotok = false;
1622 ab8500_power_supply_changed(di, &di->ac_chg.psy);
1623 }
1624 }
1625 if (di->flags.vbus_ovv) {
1626 ret = abx500_get_register_interruptible(di->dev,
1627 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG,
1628 &reg_value);
1629 if (ret < 0) {
1630 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1631 return;
1632 }
1633 if (!(reg_value & VBUS_OVV_TH)) {
1634 di->flags.vbus_ovv = false;
1635 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1636 }
1637 }
1638 /* If we still have a failure, schedule a new check */
1639 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
1640 queue_delayed_work(di->charger_wq,
1641 &di->check_hw_failure_work, round_jiffies(HZ));
1642 }
1643}
1644
1645/**
1646 * ab8500_charger_kick_watchdog_work() - kick the watchdog
1647 * @work: pointer to the work_struct structure
1648 *
1649 * Work queue function for kicking the charger watchdog.
1650 *
1651 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
1652 * logic. That means we have to continously kick the charger
1653 * watchdog even when no charger is connected. This is only
1654 * valid once the AC charger has been enabled. This is
1655 * a bug that is not handled by the algorithm and the
1656 * watchdog have to be kicked by the charger driver
1657 * when the AC charger is disabled
1658 */
1659static void ab8500_charger_kick_watchdog_work(struct work_struct *work)
1660{
1661 int ret;
1662
1663 struct ab8500_charger *di = container_of(work,
1664 struct ab8500_charger, kick_wd_work.work);
1665
1666 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1667 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
1668 if (ret)
1669 dev_err(di->dev, "Failed to kick WD!\n");
1670
1671 /* Schedule a new watchdog kick */
1672 queue_delayed_work(di->charger_wq,
1673 &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL));
1674}
1675
1676/**
1677 * ab8500_charger_ac_work() - work to get and set main charger status
1678 * @work: pointer to the work_struct structure
1679 *
1680 * Work queue function for checking the main charger status
1681 */
1682static void ab8500_charger_ac_work(struct work_struct *work)
1683{
1684 int ret;
1685
1686 struct ab8500_charger *di = container_of(work,
1687 struct ab8500_charger, ac_work);
1688
1689 /*
1690 * Since we can't be sure that the events are received
1691 * synchronously, we have the check if the main charger is
1692 * connected by reading the status register
1693 */
1694 ret = ab8500_charger_detect_chargers(di);
1695 if (ret < 0)
1696 return;
1697
1698 if (ret & AC_PW_CONN) {
1699 di->ac.charger_connected = 1;
1700 di->ac_conn = true;
1701 } else {
1702 di->ac.charger_connected = 0;
1703 }
1704
1705 ab8500_power_supply_changed(di, &di->ac_chg.psy);
1706 sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present");
1707}
1708
1709/**
1710 * ab8500_charger_detect_usb_type_work() - work to detect USB type
1711 * @work: Pointer to the work_struct structure
1712 *
1713 * Detect the type of USB plugged
1714 */
64eb9b02 1715static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
84edbeea
AM		 1716{
1717 int ret;
1718
1719 struct ab8500_charger *di = container_of(work,
1720 struct ab8500_charger, detect_usb_type_work);
1721
1722 /*
1723 * Since we can't be sure that the events are received
1724 * synchronously, we have the check if is
1725 * connected by reading the status register
1726 */
1727 ret = ab8500_charger_detect_chargers(di);
1728 if (ret < 0)
1729 return;
1730
1731 if (!(ret & USB_PW_CONN)) {
1732 di->vbus_detected = 0;
1733 ab8500_charger_set_usb_connected(di, false);
1734 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1735 } else {
1736 di->vbus_detected = 1;
1737
1738 if (is_ab8500_1p1_or_earlier(di->parent)) {
1739 ret = ab8500_charger_detect_usb_type(di);
1740 if (!ret) {
1741 ab8500_charger_set_usb_connected(di, true);
1742 ab8500_power_supply_changed(di,
1743 &di->usb_chg.psy);
1744 }
1745 } else {
1746 /* For ABB cut2.0 and onwards we have an IRQ,
1747 * USB_LINK_STATUS that will be triggered when the USB
1748 * link status changes. The exception is USB connected
1749 * during startup. Then we don't get a
1750 * USB_LINK_STATUS IRQ
1751 */
1752 if (di->vbus_detected_start) {
1753 di->vbus_detected_start = false;
1754 ret = ab8500_charger_detect_usb_type(di);
1755 if (!ret) {
1756 ab8500_charger_set_usb_connected(di,
1757 true);
1758 ab8500_power_supply_changed(di,
1759 &di->usb_chg.psy);
1760 }
1761 }
1762 }
1763 }
1764}
1765
1766/**
1767 * ab8500_charger_usb_link_status_work() - work to detect USB type
1768 * @work: pointer to the work_struct structure
1769 *
1770 * Detect the type of USB plugged
1771 */
1772static void ab8500_charger_usb_link_status_work(struct work_struct *work)
1773{
1774 int ret;
1775
1776 struct ab8500_charger *di = container_of(work,
1777 struct ab8500_charger, usb_link_status_work);
1778
1779 /*
1780 * Since we can't be sure that the events are received
1781 * synchronously, we have the check if is
1782 * connected by reading the status register
1783 */
1784 ret = ab8500_charger_detect_chargers(di);
1785 if (ret < 0)
1786 return;
1787
1788 if (!(ret & USB_PW_CONN)) {
1789 di->vbus_detected = 0;
1790 ab8500_charger_set_usb_connected(di, false);
1791 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1792 } else {
1793 di->vbus_detected = 1;
1794 ret = ab8500_charger_read_usb_type(di);
1795 if (!ret) {
1796 /* Update maximum input current */
1797 ret = ab8500_charger_set_vbus_in_curr(di,
1798 di->max_usb_in_curr);
1799 if (ret)
1800 return;
1801
1802 ab8500_charger_set_usb_connected(di, true);
1803 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1804 } else if (ret == -ENXIO) {
1805 /* No valid charger type detected */
1806 ab8500_charger_set_usb_connected(di, false);
1807 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1808 }
1809 }
1810}
1811
1812static void ab8500_charger_usb_state_changed_work(struct work_struct *work)
1813{
1814 int ret;
1815 unsigned long flags;
1816
1817 struct ab8500_charger *di = container_of(work,
1818 struct ab8500_charger, usb_state_changed_work);
1819
1820 if (!di->vbus_detected)
1821 return;
1822
1823 spin_lock_irqsave(&di->usb_state.usb_lock, flags);
1824 di->usb_state.usb_changed = false;
1825 spin_unlock_irqrestore(&di->usb_state.usb_lock, flags);
1826
1827 /*
1828 * wait for some time until you get updates from the usb stack
1829 * and negotiations are completed
1830 */
1831 msleep(250);
1832
1833 if (di->usb_state.usb_changed)
1834 return;
1835
1836 dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n",
1837 __func__, di->usb_state.state, di->usb_state.usb_current);
1838
1839 switch (di->usb_state.state) {
1840 case AB8500_BM_USB_STATE_RESET_HS:
1841 case AB8500_BM_USB_STATE_RESET_FS:
1842 case AB8500_BM_USB_STATE_SUSPEND:
1843 case AB8500_BM_USB_STATE_MAX:
1844 ab8500_charger_set_usb_connected(di, false);
1845 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1846 break;
1847
1848 case AB8500_BM_USB_STATE_RESUME:
1849 /*
1850 * when suspend->resume there should be delay
1851 * of 1sec for enabling charging
1852 */
1853 msleep(1000);
1854 /* Intentional fall through */
1855 case AB8500_BM_USB_STATE_CONFIGURED:
1856 /*
1857 * USB is configured, enable charging with the charging
1858 * input current obtained from USB driver
1859 */
1860 if (!ab8500_charger_get_usb_cur(di)) {
1861 /* Update maximum input current */
1862 ret = ab8500_charger_set_vbus_in_curr(di,
1863 di->max_usb_in_curr);
1864 if (ret)
1865 return;
1866
1867 ab8500_charger_set_usb_connected(di, true);
1868 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1869 }
1870 break;
1871
1872 default:
1873 break;
1874 };
1875}
1876
1877/**
1878 * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status
1879 * @work: pointer to the work_struct structure
1880 *
1881 * Work queue function for checking the USB charger Not OK status
1882 */
1883static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work)
1884{
1885 int ret;
1886 u8 reg_value;
1887 bool prev_status;
1888
1889 struct ab8500_charger *di = container_of(work,
1890 struct ab8500_charger, check_usbchgnotok_work.work);
1891
1892 /* Check if the status bit for usbchargernotok is still active */
1893 ret = abx500_get_register_interruptible(di->dev,
1894 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
1895 if (ret < 0) {
1896 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1897 return;
1898 }
1899 prev_status = di->flags.usbchargernotok;
1900
1901 if (reg_value & VBUS_CH_NOK) {
1902 di->flags.usbchargernotok = true;
1903 /* Check again in 1sec */
1904 queue_delayed_work(di->charger_wq,
1905 &di->check_usbchgnotok_work, HZ);
1906 } else {
1907 di->flags.usbchargernotok = false;
1908 di->flags.vbus_collapse = false;
1909 }
1910
1911 if (prev_status != di->flags.usbchargernotok)
1912 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1913}
1914
1915/**
1916 * ab8500_charger_check_main_thermal_prot_work() - check main thermal status
1917 * @work: pointer to the work_struct structure
1918 *
1919 * Work queue function for checking the Main thermal prot status
1920 */
1921static void ab8500_charger_check_main_thermal_prot_work(
1922 struct work_struct *work)
1923{
1924 int ret;
1925 u8 reg_value;
1926
1927 struct ab8500_charger *di = container_of(work,
1928 struct ab8500_charger, check_main_thermal_prot_work);
1929
1930 /* Check if the status bit for main_thermal_prot is still active */
1931 ret = abx500_get_register_interruptible(di->dev,
1932 AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
1933 if (ret < 0) {
1934 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1935 return;
1936 }
1937 if (reg_value & MAIN_CH_TH_PROT)
1938 di->flags.main_thermal_prot = true;
1939 else
1940 di->flags.main_thermal_prot = false;
1941
1942 ab8500_power_supply_changed(di, &di->ac_chg.psy);
1943}
1944
1945/**
1946 * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status
1947 * @work: pointer to the work_struct structure
1948 *
1949 * Work queue function for checking the USB thermal prot status
1950 */
1951static void ab8500_charger_check_usb_thermal_prot_work(
1952 struct work_struct *work)
1953{
1954 int ret;
1955 u8 reg_value;
1956
1957 struct ab8500_charger *di = container_of(work,
1958 struct ab8500_charger, check_usb_thermal_prot_work);
1959
1960 /* Check if the status bit for usb_thermal_prot is still active */
1961 ret = abx500_get_register_interruptible(di->dev,
1962 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
1963 if (ret < 0) {
1964 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1965 return;
1966 }
1967 if (reg_value & USB_CH_TH_PROT)
1968 di->flags.usb_thermal_prot = true;
1969 else
1970 di->flags.usb_thermal_prot = false;
1971
1972 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1973}
1974
1975/**
1976 * ab8500_charger_mainchunplugdet_handler() - main charger unplugged
1977 * @irq: interrupt number
1978 * @_di: pointer to the ab8500_charger structure
1979 *
1980 * Returns IRQ status(IRQ_HANDLED)
1981 */
1982static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di)
1983{
1984 struct ab8500_charger *di = _di;
1985
1986 dev_dbg(di->dev, "Main charger unplugged\n");
1987 queue_work(di->charger_wq, &di->ac_work);
1988
1989 return IRQ_HANDLED;
1990}
1991
1992/**
1993 * ab8500_charger_mainchplugdet_handler() - main charger plugged
1994 * @irq: interrupt number
1995 * @_di: pointer to the ab8500_charger structure
1996 *
1997 * Returns IRQ status(IRQ_HANDLED)
1998 */
1999static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di)
2000{
2001 struct ab8500_charger *di = _di;
2002
2003 dev_dbg(di->dev, "Main charger plugged\n");
2004 queue_work(di->charger_wq, &di->ac_work);
2005
2006 return IRQ_HANDLED;
2007}
2008
2009/**
2010 * ab8500_charger_mainextchnotok_handler() - main charger not ok
2011 * @irq: interrupt number
2012 * @_di: pointer to the ab8500_charger structure
2013 *
2014 * Returns IRQ status(IRQ_HANDLED)
2015 */
2016static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di)
2017{
2018 struct ab8500_charger *di = _di;
2019
2020 dev_dbg(di->dev, "Main charger not ok\n");
2021 di->flags.mainextchnotok = true;
2022 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2023
2024 /* Schedule a new HW failure check */
2025 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2026
2027 return IRQ_HANDLED;
2028}
2029
2030/**
2031 * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger
2032 * thermal protection threshold
2033 * @irq: interrupt number
2034 * @_di: pointer to the ab8500_charger structure
2035 *
2036 * Returns IRQ status(IRQ_HANDLED)
2037 */
2038static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di)
2039{
2040 struct ab8500_charger *di = _di;
2041
2042 dev_dbg(di->dev,
2043 "Die temp above Main charger thermal protection threshold\n");
2044 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2045
2046 return IRQ_HANDLED;
2047}
2048
2049/**
2050 * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger
2051 * thermal protection threshold
2052 * @irq: interrupt number
2053 * @_di: pointer to the ab8500_charger structure
2054 *
2055 * Returns IRQ status(IRQ_HANDLED)
2056 */
2057static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di)
2058{
2059 struct ab8500_charger *di = _di;
2060
2061 dev_dbg(di->dev,
2062 "Die temp ok for Main charger thermal protection threshold\n");
2063 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2064
2065 return IRQ_HANDLED;
2066}
2067
2068/**
2069 * ab8500_charger_vbusdetf_handler() - VBUS falling detected
2070 * @irq: interrupt number
2071 * @_di: pointer to the ab8500_charger structure
2072 *
2073 * Returns IRQ status(IRQ_HANDLED)
2074 */
2075static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di)
2076{
2077 struct ab8500_charger *di = _di;
2078
2079 dev_dbg(di->dev, "VBUS falling detected\n");
2080 queue_work(di->charger_wq, &di->detect_usb_type_work);
2081
2082 return IRQ_HANDLED;
2083}
2084
2085/**
2086 * ab8500_charger_vbusdetr_handler() - VBUS rising detected
2087 * @irq: interrupt number
2088 * @_di: pointer to the ab8500_charger structure
2089 *
2090 * Returns IRQ status(IRQ_HANDLED)
2091 */
2092static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di)
2093{
2094 struct ab8500_charger *di = _di;
2095
2096 di->vbus_detected = true;
2097 dev_dbg(di->dev, "VBUS rising detected\n");
2098 queue_work(di->charger_wq, &di->detect_usb_type_work);
2099
2100 return IRQ_HANDLED;
2101}
2102
2103/**
2104 * ab8500_charger_usblinkstatus_handler() - USB link status has changed
2105 * @irq: interrupt number
2106 * @_di: pointer to the ab8500_charger structure
2107 *
2108 * Returns IRQ status(IRQ_HANDLED)
2109 */
2110static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di)
2111{
2112 struct ab8500_charger *di = _di;
2113
2114 dev_dbg(di->dev, "USB link status changed\n");
2115
2116 queue_work(di->charger_wq, &di->usb_link_status_work);
2117
2118 return IRQ_HANDLED;
2119}
2120
2121/**
2122 * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger
2123 * thermal protection threshold
2124 * @irq: interrupt number
2125 * @_di: pointer to the ab8500_charger structure
2126 *
2127 * Returns IRQ status(IRQ_HANDLED)
2128 */
2129static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di)
2130{
2131 struct ab8500_charger *di = _di;
2132
2133 dev_dbg(di->dev,
2134 "Die temp above USB charger thermal protection threshold\n");
2135 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2136
2137 return IRQ_HANDLED;
2138}
2139
2140/**
2141 * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger
2142 * thermal protection threshold
2143 * @irq: interrupt number
2144 * @_di: pointer to the ab8500_charger structure
2145 *
2146 * Returns IRQ status(IRQ_HANDLED)
2147 */
2148static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di)
2149{
2150 struct ab8500_charger *di = _di;
2151
2152 dev_dbg(di->dev,
2153 "Die temp ok for USB charger thermal protection threshold\n");
2154 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2155
2156 return IRQ_HANDLED;
2157}
2158
2159/**
2160 * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected
2161 * @irq: interrupt number
2162 * @_di: pointer to the ab8500_charger structure
2163 *
2164 * Returns IRQ status(IRQ_HANDLED)
2165 */
2166static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di)
2167{
2168 struct ab8500_charger *di = _di;
2169
2170 dev_dbg(di->dev, "Not allowed USB charger detected\n");
2171 queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0);
2172
2173 return IRQ_HANDLED;
2174}
2175
2176/**
2177 * ab8500_charger_chwdexp_handler() - Charger watchdog expired
2178 * @irq: interrupt number
2179 * @_di: pointer to the ab8500_charger structure
2180 *
2181 * Returns IRQ status(IRQ_HANDLED)
2182 */
2183static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di)
2184{
2185 struct ab8500_charger *di = _di;
2186
2187 dev_dbg(di->dev, "Charger watchdog expired\n");
2188
2189 /*
2190 * The charger that was online when the watchdog expired
2191 * needs to be restarted for charging to start again
2192 */
2193 if (di->ac.charger_online) {
2194 di->ac.wd_expired = true;
2195 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2196 }
2197 if (di->usb.charger_online) {
2198 di->usb.wd_expired = true;
2199 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2200 }
2201
2202 return IRQ_HANDLED;
2203}
2204
2205/**
2206 * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected
2207 * @irq: interrupt number
2208 * @_di: pointer to the ab8500_charger structure
2209 *
2210 * Returns IRQ status(IRQ_HANDLED)
2211 */
2212static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di)
2213{
2214 struct ab8500_charger *di = _di;
2215
2216 dev_dbg(di->dev, "VBUS overvoltage detected\n");
2217 di->flags.vbus_ovv = true;
2218 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2219
2220 /* Schedule a new HW failure check */
2221 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2222
2223 return IRQ_HANDLED;
2224}
2225
2226/**
2227 * ab8500_charger_ac_get_property() - get the ac/mains properties
2228 * @psy: pointer to the power_supply structure
2229 * @psp: pointer to the power_supply_property structure
2230 * @val: pointer to the power_supply_propval union
2231 *
2232 * This function gets called when an application tries to get the ac/mains
2233 * properties by reading the sysfs files.
2234 * AC/Mains properties are online, present and voltage.
2235 * online: ac/mains charging is in progress or not
2236 * present: presence of the ac/mains
2237 * voltage: AC/Mains voltage
2238 * Returns error code in case of failure else 0(on success)
2239 */
2240static int ab8500_charger_ac_get_property(struct power_supply *psy,
2241 enum power_supply_property psp,
2242 union power_supply_propval *val)
2243{
2244 struct ab8500_charger *di;
2245
2246 di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy));
2247
2248 switch (psp) {
2249 case POWER_SUPPLY_PROP_HEALTH:
2250 if (di->flags.mainextchnotok)
2251 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2252 else if (di->ac.wd_expired || di->usb.wd_expired)
2253 val->intval = POWER_SUPPLY_HEALTH_DEAD;
2254 else if (di->flags.main_thermal_prot)
2255 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2256 else
2257 val->intval = POWER_SUPPLY_HEALTH_GOOD;
2258 break;
2259 case POWER_SUPPLY_PROP_ONLINE:
2260 val->intval = di->ac.charger_online;
2261 break;
2262 case POWER_SUPPLY_PROP_PRESENT:
2263 val->intval = di->ac.charger_connected;
2264 break;
2265 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2266 di->ac.charger_voltage = ab8500_charger_get_ac_voltage(di);
2267 val->intval = di->ac.charger_voltage * 1000;
2268 break;
2269 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2270 /*
2271 * This property is used to indicate when CV mode is entered
2272 * for the AC charger
2273 */
2274 di->ac.cv_active = ab8500_charger_ac_cv(di);
2275 val->intval = di->ac.cv_active;
2276 break;
2277 case POWER_SUPPLY_PROP_CURRENT_NOW:
2278 val->intval = ab8500_charger_get_ac_current(di) * 1000;
2279 break;
2280 default:
2281 return -EINVAL;
2282 }
2283 return 0;
2284}
2285
2286/**
2287 * ab8500_charger_usb_get_property() - get the usb properties
2288 * @psy: pointer to the power_supply structure
2289 * @psp: pointer to the power_supply_property structure
2290 * @val: pointer to the power_supply_propval union
2291 *
2292 * This function gets called when an application tries to get the usb
2293 * properties by reading the sysfs files.
2294 * USB properties are online, present and voltage.
2295 * online: usb charging is in progress or not
2296 * present: presence of the usb
2297 * voltage: vbus voltage
2298 * Returns error code in case of failure else 0(on success)
2299 */
2300static int ab8500_charger_usb_get_property(struct power_supply *psy,
2301 enum power_supply_property psp,
2302 union power_supply_propval *val)
2303{
2304 struct ab8500_charger *di;
2305
2306 di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy));
2307
2308 switch (psp) {
2309 case POWER_SUPPLY_PROP_HEALTH:
2310 if (di->flags.usbchargernotok)
2311 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2312 else if (di->ac.wd_expired || di->usb.wd_expired)
2313 val->intval = POWER_SUPPLY_HEALTH_DEAD;
2314 else if (di->flags.usb_thermal_prot)
2315 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2316 else if (di->flags.vbus_ovv)
2317 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
2318 else
2319 val->intval = POWER_SUPPLY_HEALTH_GOOD;
2320 break;
2321 case POWER_SUPPLY_PROP_ONLINE:
2322 val->intval = di->usb.charger_online;
2323 break;
2324 case POWER_SUPPLY_PROP_PRESENT:
2325 val->intval = di->usb.charger_connected;
2326 break;
2327 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2328 di->usb.charger_voltage = ab8500_charger_get_vbus_voltage(di);
2329 val->intval = di->usb.charger_voltage * 1000;
2330 break;
2331 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2332 /*
2333 * This property is used to indicate when CV mode is entered
2334 * for the USB charger
2335 */
2336 di->usb.cv_active = ab8500_charger_usb_cv(di);
2337 val->intval = di->usb.cv_active;
2338 break;
2339 case POWER_SUPPLY_PROP_CURRENT_NOW:
2340 val->intval = ab8500_charger_get_usb_current(di) * 1000;
2341 break;
2342 case POWER_SUPPLY_PROP_CURRENT_AVG:
2343 /*
2344 * This property is used to indicate when VBUS has collapsed
2345 * due to too high output current from the USB charger
2346 */
2347 if (di->flags.vbus_collapse)
2348 val->intval = 1;
2349 else
2350 val->intval = 0;
2351 break;
2352 default:
2353 return -EINVAL;
2354 }
2355 return 0;
2356}
2357
2358/**
2359 * ab8500_charger_init_hw_registers() - Set up charger related registers
2360 * @di: pointer to the ab8500_charger structure
2361 *
2362 * Set up charger OVV, watchdog and maximum voltage registers as well as
2363 * charging of the backup battery
2364 */
2365static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
2366{
2367 int ret = 0;
2368
2369 /* Setup maximum charger current and voltage for ABB cut2.0 */
2370 if (!is_ab8500_1p1_or_earlier(di->parent)) {
2371 ret = abx500_set_register_interruptible(di->dev,
2372 AB8500_CHARGER,
2373 AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6);
2374 if (ret) {
2375 dev_err(di->dev,
2376 "failed to set CH_VOLT_LVL_MAX_REG\n");
2377 goto out;
2378 }
2379
2380 ret = abx500_set_register_interruptible(di->dev,
2381 AB8500_CHARGER,
2382 AB8500_CH_OPT_CRNTLVL_MAX_REG, CH_OP_CUR_LVL_1P6);
2383 if (ret) {
2384 dev_err(di->dev,
2385 "failed to set CH_OPT_CRNTLVL_MAX_REG\n");
2386 goto out;
2387 }
2388 }
2389
2390 /* VBUS OVV set to 6.3V and enable automatic current limitiation */
2391 ret = abx500_set_register_interruptible(di->dev,
2392 AB8500_CHARGER,
2393 AB8500_USBCH_CTRL2_REG,
2394 VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA);
2395 if (ret) {
2396 dev_err(di->dev, "failed to set VBUS OVV\n");
2397 goto out;
2398 }
2399
2400 /* Enable main watchdog in OTP */
2401 ret = abx500_set_register_interruptible(di->dev,
2402 AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD);
2403 if (ret) {
2404 dev_err(di->dev, "failed to enable main WD in OTP\n");
2405 goto out;
2406 }
2407
2408 /* Enable main watchdog */
2409 ret = abx500_set_register_interruptible(di->dev,
2410 AB8500_SYS_CTRL2_BLOCK,
2411 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA);
2412 if (ret) {
2413 dev_err(di->dev, "faile to enable main watchdog\n");
2414 goto out;
2415 }
2416
2417 /*
2418 * Due to internal synchronisation, Enable and Kick watchdog bits
2419 * cannot be enabled in a single write.
2420 * A minimum delay of 2*32 kHz period (62.5µs) must be inserted
2421 * between writing Enable then Kick bits.
2422 */
2423 udelay(63);
2424
2425 /* Kick main watchdog */
2426 ret = abx500_set_register_interruptible(di->dev,
2427 AB8500_SYS_CTRL2_BLOCK,
2428 AB8500_MAIN_WDOG_CTRL_REG,
2429 (MAIN_WDOG_ENA | MAIN_WDOG_KICK));
2430 if (ret) {
2431 dev_err(di->dev, "failed to kick main watchdog\n");
2432 goto out;
2433 }
2434
2435 /* Disable main watchdog */
2436 ret = abx500_set_register_interruptible(di->dev,
2437 AB8500_SYS_CTRL2_BLOCK,
2438 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS);
2439 if (ret) {
2440 dev_err(di->dev, "failed to disable main watchdog\n");
2441 goto out;
2442 }
2443
2444 /* Set watchdog timeout */
2445 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
2446 AB8500_CH_WD_TIMER_REG, WD_TIMER);
2447 if (ret) {
2448 dev_err(di->dev, "failed to set charger watchdog timeout\n");
2449 goto out;
2450 }
2451
2452 /* Backup battery voltage and current */
2453 ret = abx500_set_register_interruptible(di->dev,
2454 AB8500_RTC,
2455 AB8500_RTC_BACKUP_CHG_REG,
b0284de0
LJ		 2456 di->bm->bkup_bat_v |
2457 di->bm->bkup_bat_i);
84edbeea
AM		 2458 if (ret) {
2459 dev_err(di->dev, "failed to setup backup battery charging\n");
2460 goto out;
2461 }
2462
2463 /* Enable backup battery charging */
2464 abx500_mask_and_set_register_interruptible(di->dev,
2465 AB8500_RTC, AB8500_RTC_CTRL_REG,
2466 RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
2467 if (ret < 0)
2468 dev_err(di->dev, "%s mask and set failed\n", __func__);
2469
2470out:
2471 return ret;
2472}
2473
2474/*
2475 * ab8500 charger driver interrupts and their respective isr
2476 */
2477static struct ab8500_charger_interrupts ab8500_charger_irq[] = {
2478 {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler},
2479 {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler},
2480 {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler},
2481 {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler},
2482 {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler},
2483 {"VBUS_DET_F", ab8500_charger_vbusdetf_handler},
2484 {"VBUS_DET_R", ab8500_charger_vbusdetr_handler},
2485 {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler},
2486 {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler},
2487 {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler},
2488 {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler},
2489 {"VBUS_OVV", ab8500_charger_vbusovv_handler},
2490 {"CH_WD_EXP", ab8500_charger_chwdexp_handler},
2491};
2492
2493static int ab8500_charger_usb_notifier_call(struct notifier_block *nb,
2494 unsigned long event, void *power)
2495{
2496 struct ab8500_charger *di =
2497 container_of(nb, struct ab8500_charger, nb);
2498 enum ab8500_usb_state bm_usb_state;
2499 unsigned mA = *((unsigned *)power);
2500
2501 if (event != USB_EVENT_VBUS) {
2502 dev_dbg(di->dev, "not a standard host, returning\n");
2503 return NOTIFY_DONE;
2504 }
2505
2506 /* TODO: State is fabricate here. See if charger really needs USB
2507 * state or if mA is enough
2508 */
2509 if ((di->usb_state.usb_current == 2) && (mA > 2))
2510 bm_usb_state = AB8500_BM_USB_STATE_RESUME;
2511 else if (mA == 0)
2512 bm_usb_state = AB8500_BM_USB_STATE_RESET_HS;
2513 else if (mA == 2)
2514 bm_usb_state = AB8500_BM_USB_STATE_SUSPEND;
2515 else if (mA >= 8) /* 8, 100, 500 */
2516 bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED;
2517 else /* Should never occur */
2518 bm_usb_state = AB8500_BM_USB_STATE_RESET_FS;
2519
2520 dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n",
2521 __func__, bm_usb_state, mA);
2522
2523 spin_lock(&di->usb_state.usb_lock);
2524 di->usb_state.usb_changed = true;
2525 spin_unlock(&di->usb_state.usb_lock);
2526
2527 di->usb_state.state = bm_usb_state;
2528 di->usb_state.usb_current = mA;
2529
2530 queue_work(di->charger_wq, &di->usb_state_changed_work);
2531
2532 return NOTIFY_OK;
2533}
2534
2535#if defined(CONFIG_PM)
2536static int ab8500_charger_resume(struct platform_device *pdev)
2537{
2538 int ret;
2539 struct ab8500_charger *di = platform_get_drvdata(pdev);
2540
2541 /*
2542 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
2543 * logic. That means we have to continously kick the charger
2544 * watchdog even when no charger is connected. This is only
2545 * valid once the AC charger has been enabled. This is
2546 * a bug that is not handled by the algorithm and the
2547 * watchdog have to be kicked by the charger driver
2548 * when the AC charger is disabled
2549 */
2550 if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) {
2551 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
2552 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
2553 if (ret)
2554 dev_err(di->dev, "Failed to kick WD!\n");
2555
2556 /* If not already pending start a new timer */
2557 if (!delayed_work_pending(
2558 &di->kick_wd_work)) {
2559 queue_delayed_work(di->charger_wq, &di->kick_wd_work,
2560 round_jiffies(WD_KICK_INTERVAL));
2561 }
2562 }
2563
2564 /* If we still have a HW failure, schedule a new check */
2565 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
2566 queue_delayed_work(di->charger_wq,
2567 &di->check_hw_failure_work, 0);
2568 }
2569
2570 return 0;
2571}
2572
2573static int ab8500_charger_suspend(struct platform_device *pdev,
2574 pm_message_t state)
2575{
2576 struct ab8500_charger *di = platform_get_drvdata(pdev);
2577
2578 /* Cancel any pending HW failure check */
2579 if (delayed_work_pending(&di->check_hw_failure_work))
2580 cancel_delayed_work(&di->check_hw_failure_work);
2581
2582 return 0;
2583}
2584#else
2585#define ab8500_charger_suspend NULL
2586#define ab8500_charger_resume NULL
2587#endif
2588
415ec69f 2589static int ab8500_charger_remove(struct platform_device *pdev)
84edbeea
AM		 2590{
2591 struct ab8500_charger *di = platform_get_drvdata(pdev);
2592 int i, irq, ret;
2593
2594 /* Disable AC charging */
2595 ab8500_charger_ac_en(&di->ac_chg, false, 0, 0);
2596
2597 /* Disable USB charging */
2598 ab8500_charger_usb_en(&di->usb_chg, false, 0, 0);
2599
2600 /* Disable interrupts */
2601 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
2602 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
2603 free_irq(irq, di);
2604 }
2605
84edbeea
AM		 2606 /* Backup battery voltage and current disable */
2607 ret = abx500_mask_and_set_register_interruptible(di->dev,
2608 AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0);
2609 if (ret < 0)
2610 dev_err(di->dev, "%s mask and set failed\n", __func__);
2611
efd71c89 2612 usb_unregister_notifier(di->usb_phy, &di->nb);
721002ec 2613 usb_put_phy(di->usb_phy);
84edbeea
AM		 2614
2615 /* Delete the work queue */
2616 destroy_workqueue(di->charger_wq);
2617
2618 flush_scheduled_work();
2619 power_supply_unregister(&di->usb_chg.psy);
2620 power_supply_unregister(&di->ac_chg.psy);
2621 platform_set_drvdata(pdev, NULL);
84edbeea
AM		 2622
2623 return 0;
2624}
2625
4aef72db
R		 2626static char *supply_interface[] = {
2627 "ab8500_chargalg",
2628 "ab8500_fg",
2629 "ab8500_btemp",
2630};
2631
c8afa640 2632static int ab8500_charger_probe(struct platform_device *pdev)
84edbeea 2633{
4aef72db 2634 struct device_node *np = pdev->dev.of_node;
7722b799 2635 struct abx500_bm_data *plat = pdev->dev.platform_data;
2aac3de1 2636 struct ab8500_charger *di;
e0f1abeb 2637 int irq, i, charger_status, ret = 0;
84edbeea 2638
4aef72db
R		 2639 di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
2640 if (!di) {
2641 dev_err(&pdev->dev, "%s no mem for ab8500_charger\n", __func__);
84edbeea 2642 return -ENOMEM;
4aef72db 2643 }
7722b799
LJ		 2644
2645 if (!plat) {
2646 dev_err(&pdev->dev, "no battery management data supplied\n");
2647 return -EINVAL;
2648 }
2649 di->bm = plat;
2650
2651 if (np) {
2652 ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm);
2653 if (ret) {
2654 dev_err(&pdev->dev, "failed to get battery information\n");
2655 return ret;
4aef72db 2656 }
7722b799
LJ		 2657 di->autopower_cfg = of_property_read_bool(np, "autopower_cfg");
2658 } else
4aef72db 2659 di->autopower_cfg = false;
84edbeea
AM		 2660
2661 /* get parent data */
2662 di->dev = &pdev->dev;
2663 di->parent = dev_get_drvdata(pdev->dev.parent);
2664 di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
2665
2666 /* initialize lock */
2667 spin_lock_init(&di->usb_state.usb_lock);
2668
84edbeea
AM		 2669 di->autopower = false;
2670
2671 /* AC supply */
2672 /* power_supply base class */
2673 di->ac_chg.psy.name = "ab8500_ac";
2674 di->ac_chg.psy.type = POWER_SUPPLY_TYPE_MAINS;
2675 di->ac_chg.psy.properties = ab8500_charger_ac_props;
2676 di->ac_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_ac_props);
2677 di->ac_chg.psy.get_property = ab8500_charger_ac_get_property;
4aef72db
R		 2678 di->ac_chg.psy.supplied_to = supply_interface;
2679 di->ac_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface),
84edbeea
AM		 2680 /* ux500_charger sub-class */
2681 di->ac_chg.ops.enable = &ab8500_charger_ac_en;
2682 di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
2683 di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current;
2684 di->ac_chg.max_out_volt = ab8500_charger_voltage_map[
2685 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
2686 di->ac_chg.max_out_curr = ab8500_charger_current_map[
2687 ARRAY_SIZE(ab8500_charger_current_map) - 1];
2688
2689 /* USB supply */
2690 /* power_supply base class */
2691 di->usb_chg.psy.name = "ab8500_usb";
2692 di->usb_chg.psy.type = POWER_SUPPLY_TYPE_USB;
2693 di->usb_chg.psy.properties = ab8500_charger_usb_props;
2694 di->usb_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_usb_props);
2695 di->usb_chg.psy.get_property = ab8500_charger_usb_get_property;
4aef72db
R		 2696 di->usb_chg.psy.supplied_to = supply_interface;
2697 di->usb_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface),
84edbeea
AM		 2698 /* ux500_charger sub-class */
2699 di->usb_chg.ops.enable = &ab8500_charger_usb_en;
2700 di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
2701 di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current;
2702 di->usb_chg.max_out_volt = ab8500_charger_voltage_map[
2703 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
2704 di->usb_chg.max_out_curr = ab8500_charger_current_map[
2705 ARRAY_SIZE(ab8500_charger_current_map) - 1];
2706
2707
2708 /* Create a work queue for the charger */
2709 di->charger_wq =
2710 create_singlethread_workqueue("ab8500_charger_wq");
2711 if (di->charger_wq == NULL) {
2712 dev_err(di->dev, "failed to create work queue\n");
4aef72db 2713 return -ENOMEM;
84edbeea
AM		 2714 }
2715
2716 /* Init work for HW failure check */
203b42f7 2717 INIT_DEFERRABLE_WORK(&di->check_hw_failure_work,
84edbeea 2718 ab8500_charger_check_hw_failure_work);
203b42f7 2719 INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work,
84edbeea
AM		 2720 ab8500_charger_check_usbchargernotok_work);
2721
2722 /*
2723 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
2724 * logic. That means we have to continously kick the charger
2725 * watchdog even when no charger is connected. This is only
2726 * valid once the AC charger has been enabled. This is
2727 * a bug that is not handled by the algorithm and the
2728 * watchdog have to be kicked by the charger driver
2729 * when the AC charger is disabled
2730 */
203b42f7 2731 INIT_DEFERRABLE_WORK(&di->kick_wd_work,
84edbeea
AM		 2732 ab8500_charger_kick_watchdog_work);
2733
203b42f7 2734 INIT_DEFERRABLE_WORK(&di->check_vbat_work,
84edbeea
AM		 2735 ab8500_charger_check_vbat_work);
2736
2737 /* Init work for charger detection */
2738 INIT_WORK(&di->usb_link_status_work,
2739 ab8500_charger_usb_link_status_work);
2740 INIT_WORK(&di->ac_work, ab8500_charger_ac_work);
2741 INIT_WORK(&di->detect_usb_type_work,
2742 ab8500_charger_detect_usb_type_work);
2743
2744 INIT_WORK(&di->usb_state_changed_work,
2745 ab8500_charger_usb_state_changed_work);
2746
2747 /* Init work for checking HW status */
2748 INIT_WORK(&di->check_main_thermal_prot_work,
2749 ab8500_charger_check_main_thermal_prot_work);
2750 INIT_WORK(&di->check_usb_thermal_prot_work,
2751 ab8500_charger_check_usb_thermal_prot_work);
2752
2753 /*
2754 * VDD ADC supply needs to be enabled from this driver when there
2755 * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
2756 * interrupts during charging
2757 */
8feffd10 2758 di->regu = devm_regulator_get(di->dev, "vddadc");
84edbeea
AM		 2759 if (IS_ERR(di->regu)) {
2760 ret = PTR_ERR(di->regu);
2761 dev_err(di->dev, "failed to get vddadc regulator\n");
2762 goto free_charger_wq;
2763 }
2764
2765
2766 /* Initialize OVV, and other registers */
2767 ret = ab8500_charger_init_hw_registers(di);
2768 if (ret) {
2769 dev_err(di->dev, "failed to initialize ABB registers\n");
8feffd10 2770 goto free_charger_wq;
84edbeea
AM		 2771 }
2772
2773 /* Register AC charger class */
2774 ret = power_supply_register(di->dev, &di->ac_chg.psy);
2775 if (ret) {
2776 dev_err(di->dev, "failed to register AC charger\n");
8feffd10 2777 goto free_charger_wq;
84edbeea
AM		 2778 }
2779
2780 /* Register USB charger class */
2781 ret = power_supply_register(di->dev, &di->usb_chg.psy);
2782 if (ret) {
2783 dev_err(di->dev, "failed to register USB charger\n");
2784 goto free_ac;
2785 }
2786
662dca54 2787 di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
ded017ee 2788 if (IS_ERR_OR_NULL(di->usb_phy)) {
efd71c89 2789 dev_err(di->dev, "failed to get usb transceiver\n");
84edbeea
AM		 2790 ret = -EINVAL;
2791 goto free_usb;
2792 }
2793 di->nb.notifier_call = ab8500_charger_usb_notifier_call;
efd71c89 2794 ret = usb_register_notifier(di->usb_phy, &di->nb);
84edbeea 2795 if (ret) {
efd71c89
AV		 2796 dev_err(di->dev, "failed to register usb notifier\n");
2797 goto put_usb_phy;
84edbeea
AM		 2798 }
2799
2800 /* Identify the connected charger types during startup */
2801 charger_status = ab8500_charger_detect_chargers(di);
2802 if (charger_status & AC_PW_CONN) {
2803 di->ac.charger_connected = 1;
2804 di->ac_conn = true;
2805 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2806 sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present");
2807 }
2808
2809 if (charger_status & USB_PW_CONN) {
2810 dev_dbg(di->dev, "VBUS Detect during startup\n");
2811 di->vbus_detected = true;
2812 di->vbus_detected_start = true;
2813 queue_work(di->charger_wq,
2814 &di->detect_usb_type_work);
2815 }
2816
2817 /* Register interrupts */
2818 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
2819 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
2820 ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr,
2821 IRQF_SHARED | IRQF_NO_SUSPEND,
2822 ab8500_charger_irq[i].name, di);
2823
2824 if (ret != 0) {
2825 dev_err(di->dev, "failed to request %s IRQ %d: %d\n"
2826 , ab8500_charger_irq[i].name, irq, ret);
2827 goto free_irq;
2828 }
2829 dev_dbg(di->dev, "Requested %s IRQ %d: %d\n",
2830 ab8500_charger_irq[i].name, irq, ret);
2831 }
2832
2833 platform_set_drvdata(pdev, di);
2834
2835 return ret;
2836
2837free_irq:
efd71c89 2838 usb_unregister_notifier(di->usb_phy, &di->nb);
84edbeea
AM		 2839
2840 /* We also have to free all successfully registered irqs */
2841 for (i = i - 1; i >= 0; i--) {
2842 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
2843 free_irq(irq, di);
2844 }
efd71c89 2845put_usb_phy:
721002ec 2846 usb_put_phy(di->usb_phy);
84edbeea
AM		 2847free_usb:
2848 power_supply_unregister(&di->usb_chg.psy);
2849free_ac:
2850 power_supply_unregister(&di->ac_chg.psy);
84edbeea
AM		 2851free_charger_wq:
2852 destroy_workqueue(di->charger_wq);
84edbeea
AM		 2853 return ret;
2854}
2855
4aef72db
R		 2856static const struct of_device_id ab8500_charger_match[] = {
2857 { .compatible = "stericsson,ab8500-charger", },
2858 { },
2859};
2860
84edbeea
AM		 2861static struct platform_driver ab8500_charger_driver = {
2862 .probe = ab8500_charger_probe,
28ea73f4 2863 .remove = ab8500_charger_remove,
84edbeea
AM		 2864 .suspend = ab8500_charger_suspend,
2865 .resume = ab8500_charger_resume,
2866 .driver = {
2867 .name = "ab8500-charger",
2868 .owner = THIS_MODULE,
4aef72db 2869 .of_match_table = ab8500_charger_match,
84edbeea
AM		 2870 },
2871};
2872
2873static int __init ab8500_charger_init(void)
2874{
2875 return platform_driver_register(&ab8500_charger_driver);
2876}
2877
2878static void __exit ab8500_charger_exit(void)
2879{
2880 platform_driver_unregister(&ab8500_charger_driver);
2881}
2882
2883subsys_initcall_sync(ab8500_charger_init);
2884module_exit(ab8500_charger_exit);
2885
2886MODULE_LICENSE("GPL v2");
2887MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
2888MODULE_ALIAS("platform:ab8500-charger");
2889MODULE_DESCRIPTION("AB8500 charger management driver");
kernel source for telekom puls (alcatel/mediatek)