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/notifier.h>
19 #include <linux/slab.h>
20 #include <linux/platform_device.h>
21 #include <linux/power_supply.h>
22 #include <linux/completion.h>
23 #include <linux/regulator/consumer.h>
24 #include <linux/err.h>
25 #include <linux/workqueue.h>
26 #include <linux/kobject.h>
27 #include <linux/of.h>
28 #include <linux/mfd/core.h>
29 #include <linux/mfd/abx500/ab8500.h>
30 #include <linux/mfd/abx500.h>
31 #include <linux/mfd/abx500/ab8500-bm.h>
32 #include <linux/mfd/abx500/ab8500-gpadc.h>
33 #include <linux/mfd/abx500/ux500_chargalg.h>
34 #include <linux/usb/otg.h>
35 #include <linux/mutex.h>
36
37 /* Charger constants */
38 #define NO_PW_CONN 0
39 #define AC_PW_CONN 1
40 #define USB_PW_CONN 2
41
42 #define MAIN_WDOG_ENA 0x01
43 #define MAIN_WDOG_KICK 0x02
44 #define MAIN_WDOG_DIS 0x00
45 #define CHARG_WD_KICK 0x01
46 #define MAIN_CH_ENA 0x01
47 #define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02
48 #define USB_CH_ENA 0x01
49 #define USB_CHG_NO_OVERSHOOT_ENA_N 0x02
50 #define MAIN_CH_DET 0x01
51 #define MAIN_CH_CV_ON 0x04
52 #define USB_CH_CV_ON 0x08
53 #define VBUS_DET_DBNC100 0x02
54 #define VBUS_DET_DBNC1 0x01
55 #define OTP_ENABLE_WD 0x01
56 #define DROP_COUNT_RESET 0x01
57 #define USB_CH_DET 0x01
58
59 #define MAIN_CH_INPUT_CURR_SHIFT 4
60 #define VBUS_IN_CURR_LIM_SHIFT 4
61 #define AB8540_VBUS_IN_CURR_LIM_SHIFT 2
62 #define AUTO_VBUS_IN_CURR_LIM_SHIFT 4
63 #define AB8540_AUTO_VBUS_IN_CURR_MASK 0x3F
64 #define VBUS_IN_CURR_LIM_RETRY_SET_TIME 30 /* seconds */
65
66 #define LED_INDICATOR_PWM_ENA 0x01
67 #define LED_INDICATOR_PWM_DIS 0x00
68 #define LED_IND_CUR_5MA 0x04
69 #define LED_INDICATOR_PWM_DUTY_252_256 0xBF
70
71 /* HW failure constants */
72 #define MAIN_CH_TH_PROT 0x02
73 #define VBUS_CH_NOK 0x08
74 #define USB_CH_TH_PROT 0x02
75 #define VBUS_OVV_TH 0x01
76 #define MAIN_CH_NOK 0x01
77 #define VBUS_DET 0x80
78
79 #define MAIN_CH_STATUS2_MAINCHGDROP 0x80
80 #define MAIN_CH_STATUS2_MAINCHARGERDETDBNC 0x40
81 #define USB_CH_VBUSDROP 0x40
82 #define USB_CH_VBUSDETDBNC 0x01
83
84 /* UsbLineStatus register bit masks */
85 #define AB8500_USB_LINK_STATUS 0x78
86 #define AB8505_USB_LINK_STATUS 0xF8
87 #define AB8500_STD_HOST_SUSP 0x18
88 #define USB_LINK_STATUS_SHIFT 3
89
90 /* Watchdog timeout constant */
91 #define WD_TIMER 0x30 /* 4min */
92 #define WD_KICK_INTERVAL (60 * HZ)
93
94 /* Lowest charger voltage is 3.39V -> 0x4E */
95 #define LOW_VOLT_REG 0x4E
96
97 /* Step up/down delay in us */
98 #define STEP_UDELAY 1000
99
100 #define CHARGER_STATUS_POLL 10 /* in ms */
101
102 #define CHG_WD_INTERVAL (60 * HZ)
103
104 #define AB8500_SW_CONTROL_FALLBACK 0x03
105 /* Wait for enumeration before charing in us */
106 #define WAIT_ACA_RID_ENUMERATION (5 * 1000)
107 /*External charger control*/
108 #define AB8500_SYS_CHARGER_CONTROL_REG 0x52
109 #define EXTERNAL_CHARGER_DISABLE_REG_VAL 0x03
110 #define EXTERNAL_CHARGER_ENABLE_REG_VAL 0x07
111
112 /* UsbLineStatus register - usb types */
113 enum ab8500_charger_link_status {
114 USB_STAT_NOT_CONFIGURED,
115 USB_STAT_STD_HOST_NC,
116 USB_STAT_STD_HOST_C_NS,
117 USB_STAT_STD_HOST_C_S,
118 USB_STAT_HOST_CHG_NM,
119 USB_STAT_HOST_CHG_HS,
120 USB_STAT_HOST_CHG_HS_CHIRP,
121 USB_STAT_DEDICATED_CHG,
122 USB_STAT_ACA_RID_A,
123 USB_STAT_ACA_RID_B,
124 USB_STAT_ACA_RID_C_NM,
125 USB_STAT_ACA_RID_C_HS,
126 USB_STAT_ACA_RID_C_HS_CHIRP,
127 USB_STAT_HM_IDGND,
128 USB_STAT_RESERVED,
129 USB_STAT_NOT_VALID_LINK,
130 USB_STAT_PHY_EN,
131 USB_STAT_SUP_NO_IDGND_VBUS,
132 USB_STAT_SUP_IDGND_VBUS,
133 USB_STAT_CHARGER_LINE_1,
134 USB_STAT_CARKIT_1,
135 USB_STAT_CARKIT_2,
136 USB_STAT_ACA_DOCK_CHARGER,
137 };
138
139 enum ab8500_usb_state {
140 AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */
141 AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */
142 AB8500_BM_USB_STATE_CONFIGURED,
143 AB8500_BM_USB_STATE_SUSPEND,
144 AB8500_BM_USB_STATE_RESUME,
145 AB8500_BM_USB_STATE_MAX,
146 };
147
148 /* VBUS input current limits supported in AB8500 in mA */
149 #define USB_CH_IP_CUR_LVL_0P05 50
150 #define USB_CH_IP_CUR_LVL_0P09 98
151 #define USB_CH_IP_CUR_LVL_0P19 193
152 #define USB_CH_IP_CUR_LVL_0P29 290
153 #define USB_CH_IP_CUR_LVL_0P38 380
154 #define USB_CH_IP_CUR_LVL_0P45 450
155 #define USB_CH_IP_CUR_LVL_0P5 500
156 #define USB_CH_IP_CUR_LVL_0P6 600
157 #define USB_CH_IP_CUR_LVL_0P7 700
158 #define USB_CH_IP_CUR_LVL_0P8 800
159 #define USB_CH_IP_CUR_LVL_0P9 900
160 #define USB_CH_IP_CUR_LVL_1P0 1000
161 #define USB_CH_IP_CUR_LVL_1P1 1100
162 #define USB_CH_IP_CUR_LVL_1P3 1300
163 #define USB_CH_IP_CUR_LVL_1P4 1400
164 #define USB_CH_IP_CUR_LVL_1P5 1500
165
166 #define VBAT_TRESH_IP_CUR_RED 3800
167
168 #define to_ab8500_charger_usb_device_info(x) container_of((x), \
169 struct ab8500_charger, usb_chg)
170 #define to_ab8500_charger_ac_device_info(x) container_of((x), \
171 struct ab8500_charger, ac_chg)
172
173 /**
174 * struct ab8500_charger_interrupts - ab8500 interupts
175 * @name: name of the interrupt
176 * @isr function pointer to the isr
177 */
178 struct ab8500_charger_interrupts {
179 char *name;
180 irqreturn_t (*isr)(int irq, void *data);
181 };
182
183 struct ab8500_charger_info {
184 int charger_connected;
185 int charger_online;
186 int charger_voltage;
187 int cv_active;
188 bool wd_expired;
189 int charger_current;
190 };
191
192 struct ab8500_charger_event_flags {
193 bool mainextchnotok;
194 bool main_thermal_prot;
195 bool usb_thermal_prot;
196 bool vbus_ovv;
197 bool usbchargernotok;
198 bool chgwdexp;
199 bool vbus_collapse;
200 bool vbus_drop_end;
201 };
202
203 struct ab8500_charger_usb_state {
204 int usb_current;
205 int usb_current_tmp;
206 enum ab8500_usb_state state;
207 enum ab8500_usb_state state_tmp;
208 spinlock_t usb_lock;
209 };
210
211 struct ab8500_charger_max_usb_in_curr {
212 int usb_type_max;
213 int set_max;
214 int calculated_max;
215 };
216
217 /**
218 * struct ab8500_charger - ab8500 Charger device information
219 * @dev: Pointer to the structure device
220 * @vbus_detected: VBUS detected
221 * @vbus_detected_start:
222 * VBUS detected during startup
223 * @ac_conn: This will be true when the AC charger has been plugged
224 * @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC
225 * charger is enabled
226 * @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB
227 * charger is enabled
228 * @vbat Battery voltage
229 * @old_vbat Previously measured battery voltage
230 * @usb_device_is_unrecognised USB device is unrecognised by the hardware
231 * @autopower Indicate if we should have automatic pwron after pwrloss
232 * @autopower_cfg platform specific power config support for "pwron after pwrloss"
233 * @invalid_charger_detect_state State when forcing AB to use invalid charger
234 * @is_aca_rid: Incicate if accessory is ACA type
235 * @current_stepping_sessions:
236 * Counter for current stepping sessions
237 * @parent: Pointer to the struct ab8500
238 * @gpadc: Pointer to the struct gpadc
239 * @bm: Platform specific battery management information
240 * @flags: Structure for information about events triggered
241 * @usb_state: Structure for usb stack information
242 * @max_usb_in_curr: Max USB charger input current
243 * @ac_chg: AC charger power supply
244 * @usb_chg: USB charger power supply
245 * @ac: Structure that holds the AC charger properties
246 * @usb: Structure that holds the USB charger properties
247 * @regu: Pointer to the struct regulator
248 * @charger_wq: Work queue for the IRQs and checking HW state
249 * @usb_ipt_crnt_lock: Lock to protect VBUS input current setting from mutuals
250 * @pm_lock: Lock to prevent system to suspend
251 * @check_vbat_work Work for checking vbat threshold to adjust vbus current
252 * @check_hw_failure_work: Work for checking HW state
253 * @check_usbchgnotok_work: Work for checking USB charger not ok status
254 * @kick_wd_work: Work for kicking the charger watchdog in case
255 * of ABB rev 1.* due to the watchog logic bug
256 * @ac_charger_attached_work: Work for checking if AC charger is still
257 * connected
258 * @usb_charger_attached_work: Work for checking if USB charger is still
259 * connected
260 * @ac_work: Work for checking AC charger connection
261 * @detect_usb_type_work: Work for detecting the USB type connected
262 * @usb_link_status_work: Work for checking the new USB link status
263 * @usb_state_changed_work: Work for checking USB state
264 * @attach_work: Work for detecting USB type
265 * @vbus_drop_end_work: Work for detecting VBUS drop end
266 * @check_main_thermal_prot_work:
267 * Work for checking Main thermal status
268 * @check_usb_thermal_prot_work:
269 * Work for checking USB thermal status
270 * @charger_attached_mutex: For controlling the wakelock
271 */
272 struct ab8500_charger {
273 struct device *dev;
274 bool vbus_detected;
275 bool vbus_detected_start;
276 bool ac_conn;
277 bool vddadc_en_ac;
278 bool vddadc_en_usb;
279 int vbat;
280 int old_vbat;
281 bool usb_device_is_unrecognised;
282 bool autopower;
283 bool autopower_cfg;
284 int invalid_charger_detect_state;
285 int is_aca_rid;
286 atomic_t current_stepping_sessions;
287 struct ab8500 *parent;
288 struct ab8500_gpadc *gpadc;
289 struct abx500_bm_data *bm;
290 struct ab8500_charger_event_flags flags;
291 struct ab8500_charger_usb_state usb_state;
292 struct ab8500_charger_max_usb_in_curr max_usb_in_curr;
293 struct ux500_charger ac_chg;
294 struct ux500_charger usb_chg;
295 struct ab8500_charger_info ac;
296 struct ab8500_charger_info usb;
297 struct regulator *regu;
298 struct workqueue_struct *charger_wq;
299 struct mutex usb_ipt_crnt_lock;
300 struct delayed_work check_vbat_work;
301 struct delayed_work check_hw_failure_work;
302 struct delayed_work check_usbchgnotok_work;
303 struct delayed_work kick_wd_work;
304 struct delayed_work usb_state_changed_work;
305 struct delayed_work attach_work;
306 struct delayed_work ac_charger_attached_work;
307 struct delayed_work usb_charger_attached_work;
308 struct delayed_work vbus_drop_end_work;
309 struct work_struct ac_work;
310 struct work_struct detect_usb_type_work;
311 struct work_struct usb_link_status_work;
312 struct work_struct check_main_thermal_prot_work;
313 struct work_struct check_usb_thermal_prot_work;
314 struct usb_phy *usb_phy;
315 struct notifier_block nb;
316 struct mutex charger_attached_mutex;
317 };
318
319 /* AC properties */
320 static enum power_supply_property ab8500_charger_ac_props[] = {
321 POWER_SUPPLY_PROP_HEALTH,
322 POWER_SUPPLY_PROP_PRESENT,
323 POWER_SUPPLY_PROP_ONLINE,
324 POWER_SUPPLY_PROP_VOLTAGE_NOW,
325 POWER_SUPPLY_PROP_VOLTAGE_AVG,
326 POWER_SUPPLY_PROP_CURRENT_NOW,
327 };
328
329 /* USB properties */
330 static enum power_supply_property ab8500_charger_usb_props[] = {
331 POWER_SUPPLY_PROP_HEALTH,
332 POWER_SUPPLY_PROP_CURRENT_AVG,
333 POWER_SUPPLY_PROP_PRESENT,
334 POWER_SUPPLY_PROP_ONLINE,
335 POWER_SUPPLY_PROP_VOLTAGE_NOW,
336 POWER_SUPPLY_PROP_VOLTAGE_AVG,
337 POWER_SUPPLY_PROP_CURRENT_NOW,
338 };
339
340 /*
341 * Function for enabling and disabling sw fallback mode
342 * should always be disabled when no charger is connected.
343 */
ab8500_enable_disable_sw_fallback(struct ab8500_charger * di,bool fallback)344 static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di,
345 bool fallback)
346 {
347 u8 val;
348 u8 reg;
349 u8 bank;
350 u8 bit;
351 int ret;
352
353 dev_dbg(di->dev, "SW Fallback: %d\n", fallback);
354
355 if (is_ab8500(di->parent)) {
356 bank = 0x15;
357 reg = 0x0;
358 bit = 3;
359 } else {
360 bank = AB8500_SYS_CTRL1_BLOCK;
361 reg = AB8500_SW_CONTROL_FALLBACK;
362 bit = 0;
363 }
364
365 /* read the register containing fallback bit */
366 ret = abx500_get_register_interruptible(di->dev, bank, reg, &val);
367 if (ret < 0) {
368 dev_err(di->dev, "%d read failed\n", __LINE__);
369 return;
370 }
371
372 if (is_ab8500(di->parent)) {
373 /* enable the OPT emulation registers */
374 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
375 if (ret) {
376 dev_err(di->dev, "%d write failed\n", __LINE__);
377 goto disable_otp;
378 }
379 }
380
381 if (fallback)
382 val |= (1 << bit);
383 else
384 val &= ~(1 << bit);
385
386 /* write back the changed fallback bit value to register */
387 ret = abx500_set_register_interruptible(di->dev, bank, reg, val);
388 if (ret) {
389 dev_err(di->dev, "%d write failed\n", __LINE__);
390 }
391
392 disable_otp:
393 if (is_ab8500(di->parent)) {
394 /* disable the set OTP registers again */
395 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
396 if (ret) {
397 dev_err(di->dev, "%d write failed\n", __LINE__);
398 }
399 }
400 }
401
402 /**
403 * ab8500_power_supply_changed - a wrapper with local extentions for
404 * power_supply_changed
405 * @di: pointer to the ab8500_charger structure
406 * @psy: pointer to power_supply_that have changed.
407 *
408 */
ab8500_power_supply_changed(struct ab8500_charger * di,struct power_supply * psy)409 static void ab8500_power_supply_changed(struct ab8500_charger *di,
410 struct power_supply *psy)
411 {
412 /*
413 * This happens if we get notifications or interrupts and
414 * the platform has been configured not to support one or
415 * other type of charging.
416 */
417 if (!psy)
418 return;
419
420 if (di->autopower_cfg) {
421 if (!di->usb.charger_connected &&
422 !di->ac.charger_connected &&
423 di->autopower) {
424 di->autopower = false;
425 ab8500_enable_disable_sw_fallback(di, false);
426 } else if (!di->autopower &&
427 (di->ac.charger_connected ||
428 di->usb.charger_connected)) {
429 di->autopower = true;
430 ab8500_enable_disable_sw_fallback(di, true);
431 }
432 }
433 power_supply_changed(psy);
434 }
435
ab8500_charger_set_usb_connected(struct ab8500_charger * di,bool connected)436 static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
437 bool connected)
438 {
439 if (connected != di->usb.charger_connected) {
440 dev_dbg(di->dev, "USB connected:%i\n", connected);
441 di->usb.charger_connected = connected;
442
443 if (!connected)
444 di->flags.vbus_drop_end = false;
445
446 /*
447 * Sometimes the platform is configured not to support
448 * USB charging and no psy has been created, but we still
449 * will get these notifications.
450 */
451 if (di->usb_chg.psy) {
452 sysfs_notify(&di->usb_chg.psy->dev.kobj, NULL,
453 "present");
454 }
455
456 if (connected) {
457 mutex_lock(&di->charger_attached_mutex);
458 mutex_unlock(&di->charger_attached_mutex);
459
460 if (is_ab8500(di->parent))
461 queue_delayed_work(di->charger_wq,
462 &di->usb_charger_attached_work,
463 HZ);
464 } else {
465 cancel_delayed_work_sync(&di->usb_charger_attached_work);
466 mutex_lock(&di->charger_attached_mutex);
467 mutex_unlock(&di->charger_attached_mutex);
468 }
469 }
470 }
471
472 /**
473 * ab8500_charger_get_ac_voltage() - get ac charger voltage
474 * @di: pointer to the ab8500_charger structure
475 *
476 * Returns ac charger voltage (on success)
477 */
ab8500_charger_get_ac_voltage(struct ab8500_charger * di)478 static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
479 {
480 int vch;
481
482 /* Only measure voltage if the charger is connected */
483 if (di->ac.charger_connected) {
484 vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V);
485 if (vch < 0)
486 dev_err(di->dev, "%s gpadc conv failed,\n", __func__);
487 } else {
488 vch = 0;
489 }
490 return vch;
491 }
492
493 /**
494 * ab8500_charger_ac_cv() - check if the main charger is in CV mode
495 * @di: pointer to the ab8500_charger structure
496 *
497 * Returns ac charger CV mode (on success) else error code
498 */
ab8500_charger_ac_cv(struct ab8500_charger * di)499 static int ab8500_charger_ac_cv(struct ab8500_charger *di)
500 {
501 u8 val;
502 int ret = 0;
503
504 /* Only check CV mode if the charger is online */
505 if (di->ac.charger_online) {
506 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
507 AB8500_CH_STATUS1_REG, &val);
508 if (ret < 0) {
509 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
510 return 0;
511 }
512
513 if (val & MAIN_CH_CV_ON)
514 ret = 1;
515 else
516 ret = 0;
517 }
518
519 return ret;
520 }
521
522 /**
523 * ab8500_charger_get_vbus_voltage() - get vbus voltage
524 * @di: pointer to the ab8500_charger structure
525 *
526 * This function returns the vbus voltage.
527 * Returns vbus voltage (on success)
528 */
ab8500_charger_get_vbus_voltage(struct ab8500_charger * di)529 static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
530 {
531 int vch;
532
533 /* Only measure voltage if the charger is connected */
534 if (di->usb.charger_connected) {
535 vch = ab8500_gpadc_convert(di->gpadc, VBUS_V);
536 if (vch < 0)
537 dev_err(di->dev, "%s gpadc conv failed\n", __func__);
538 } else {
539 vch = 0;
540 }
541 return vch;
542 }
543
544 /**
545 * ab8500_charger_get_usb_current() - get usb charger current
546 * @di: pointer to the ab8500_charger structure
547 *
548 * This function returns the usb charger current.
549 * Returns usb current (on success) and error code on failure
550 */
ab8500_charger_get_usb_current(struct ab8500_charger * di)551 static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
552 {
553 int ich;
554
555 /* Only measure current if the charger is online */
556 if (di->usb.charger_online) {
557 ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C);
558 if (ich < 0)
559 dev_err(di->dev, "%s gpadc conv failed\n", __func__);
560 } else {
561 ich = 0;
562 }
563 return ich;
564 }
565
566 /**
567 * ab8500_charger_get_ac_current() - get ac charger current
568 * @di: pointer to the ab8500_charger structure
569 *
570 * This function returns the ac charger current.
571 * Returns ac current (on success) and error code on failure.
572 */
ab8500_charger_get_ac_current(struct ab8500_charger * di)573 static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
574 {
575 int ich;
576
577 /* Only measure current if the charger is online */
578 if (di->ac.charger_online) {
579 ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C);
580 if (ich < 0)
581 dev_err(di->dev, "%s gpadc conv failed\n", __func__);
582 } else {
583 ich = 0;
584 }
585 return ich;
586 }
587
588 /**
589 * ab8500_charger_usb_cv() - check if the usb charger is in CV mode
590 * @di: pointer to the ab8500_charger structure
591 *
592 * Returns ac charger CV mode (on success) else error code
593 */
ab8500_charger_usb_cv(struct ab8500_charger * di)594 static int ab8500_charger_usb_cv(struct ab8500_charger *di)
595 {
596 int ret;
597 u8 val;
598
599 /* Only check CV mode if the charger is online */
600 if (di->usb.charger_online) {
601 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
602 AB8500_CH_USBCH_STAT1_REG, &val);
603 if (ret < 0) {
604 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
605 return 0;
606 }
607
608 if (val & USB_CH_CV_ON)
609 ret = 1;
610 else
611 ret = 0;
612 } else {
613 ret = 0;
614 }
615
616 return ret;
617 }
618
619 /**
620 * ab8500_charger_detect_chargers() - Detect the connected chargers
621 * @di: pointer to the ab8500_charger structure
622 * @probe: if probe, don't delay and wait for HW
623 *
624 * Returns the type of charger connected.
625 * For USB it will not mean we can actually charge from it
626 * but that there is a USB cable connected that we have to
627 * identify. This is used during startup when we don't get
628 * interrupts of the charger detection
629 *
630 * Returns an integer value, that means,
631 * NO_PW_CONN no power supply is connected
632 * AC_PW_CONN if the AC power supply is connected
633 * USB_PW_CONN if the USB power supply is connected
634 * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected
635 */
ab8500_charger_detect_chargers(struct ab8500_charger * di,bool probe)636 static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe)
637 {
638 int result = NO_PW_CONN;
639 int ret;
640 u8 val;
641
642 /* Check for AC charger */
643 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
644 AB8500_CH_STATUS1_REG, &val);
645 if (ret < 0) {
646 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
647 return ret;
648 }
649
650 if (val & MAIN_CH_DET)
651 result = AC_PW_CONN;
652
653 /* Check for USB charger */
654
655 if (!probe) {
656 /*
657 * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100
658 * when disconnecting ACA even though no
659 * charger was connected. Try waiting a little
660 * longer than the 100 ms of VBUS_DET_DBNC100...
661 */
662 msleep(110);
663 }
664 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
665 AB8500_CH_USBCH_STAT1_REG, &val);
666 if (ret < 0) {
667 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
668 return ret;
669 }
670 dev_dbg(di->dev,
671 "%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__,
672 val);
673 if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100))
674 result |= USB_PW_CONN;
675
676 return result;
677 }
678
679 /**
680 * ab8500_charger_max_usb_curr() - get the max curr for the USB type
681 * @di: pointer to the ab8500_charger structure
682 * @link_status: the identified USB type
683 *
684 * Get the maximum current that is allowed to be drawn from the host
685 * based on the USB type.
686 * Returns error code in case of failure else 0 on success
687 */
ab8500_charger_max_usb_curr(struct ab8500_charger * di,enum ab8500_charger_link_status link_status)688 static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
689 enum ab8500_charger_link_status link_status)
690 {
691 int ret = 0;
692
693 di->usb_device_is_unrecognised = false;
694
695 /*
696 * Platform only supports USB 2.0.
697 * This means that charging current from USB source
698 * is maximum 500 mA. Every occurence of USB_STAT_*_HOST_*
699 * should set USB_CH_IP_CUR_LVL_0P5.
700 */
701
702 switch (link_status) {
703 case USB_STAT_STD_HOST_NC:
704 case USB_STAT_STD_HOST_C_NS:
705 case USB_STAT_STD_HOST_C_S:
706 dev_dbg(di->dev, "USB Type - Standard host is "
707 "detected through USB driver\n");
708 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
709 di->is_aca_rid = 0;
710 break;
711 case USB_STAT_HOST_CHG_HS_CHIRP:
712 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
713 di->is_aca_rid = 0;
714 break;
715 case USB_STAT_HOST_CHG_HS:
716 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
717 di->is_aca_rid = 0;
718 break;
719 case USB_STAT_ACA_RID_C_HS:
720 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P9;
721 di->is_aca_rid = 0;
722 break;
723 case USB_STAT_ACA_RID_A:
724 /*
725 * Dedicated charger level minus maximum current accessory
726 * can consume (900mA). Closest level is 500mA
727 */
728 dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n");
729 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
730 di->is_aca_rid = 1;
731 break;
732 case USB_STAT_ACA_RID_B:
733 /*
734 * Dedicated charger level minus 120mA (20mA for ACA and
735 * 100mA for potential accessory). Closest level is 1300mA
736 */
737 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P3;
738 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
739 di->max_usb_in_curr.usb_type_max);
740 di->is_aca_rid = 1;
741 break;
742 case USB_STAT_HOST_CHG_NM:
743 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
744 di->is_aca_rid = 0;
745 break;
746 case USB_STAT_DEDICATED_CHG:
747 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
748 di->is_aca_rid = 0;
749 break;
750 case USB_STAT_ACA_RID_C_HS_CHIRP:
751 case USB_STAT_ACA_RID_C_NM:
752 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
753 di->is_aca_rid = 1;
754 break;
755 case USB_STAT_NOT_CONFIGURED:
756 if (di->vbus_detected) {
757 di->usb_device_is_unrecognised = true;
758 dev_dbg(di->dev, "USB Type - Legacy charger.\n");
759 di->max_usb_in_curr.usb_type_max =
760 USB_CH_IP_CUR_LVL_1P5;
761 break;
762 }
763 case USB_STAT_HM_IDGND:
764 dev_err(di->dev, "USB Type - Charging not allowed\n");
765 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
766 ret = -ENXIO;
767 break;
768 case USB_STAT_RESERVED:
769 if (is_ab8500(di->parent)) {
770 di->flags.vbus_collapse = true;
771 dev_err(di->dev, "USB Type - USB_STAT_RESERVED "
772 "VBUS has collapsed\n");
773 ret = -ENXIO;
774 break;
775 } else {
776 dev_dbg(di->dev, "USB Type - Charging not allowed\n");
777 di->max_usb_in_curr.usb_type_max =
778 USB_CH_IP_CUR_LVL_0P05;
779 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
780 link_status,
781 di->max_usb_in_curr.usb_type_max);
782 ret = -ENXIO;
783 break;
784 }
785 case USB_STAT_CARKIT_1:
786 case USB_STAT_CARKIT_2:
787 case USB_STAT_ACA_DOCK_CHARGER:
788 case USB_STAT_CHARGER_LINE_1:
789 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
790 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
791 di->max_usb_in_curr.usb_type_max);
792 break;
793 case USB_STAT_NOT_VALID_LINK:
794 dev_err(di->dev, "USB Type invalid - try charging anyway\n");
795 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
796 break;
797
798 default:
799 dev_err(di->dev, "USB Type - Unknown\n");
800 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
801 ret = -ENXIO;
802 break;
803 };
804
805 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
806 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
807 link_status, di->max_usb_in_curr.set_max);
808
809 return ret;
810 }
811
812 /**
813 * ab8500_charger_read_usb_type() - read the type of usb connected
814 * @di: pointer to the ab8500_charger structure
815 *
816 * Detect the type of the plugged USB
817 * Returns error code in case of failure else 0 on success
818 */
ab8500_charger_read_usb_type(struct ab8500_charger * di)819 static int ab8500_charger_read_usb_type(struct ab8500_charger *di)
820 {
821 int ret;
822 u8 val;
823
824 ret = abx500_get_register_interruptible(di->dev,
825 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val);
826 if (ret < 0) {
827 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
828 return ret;
829 }
830 if (is_ab8500(di->parent))
831 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
832 AB8500_USB_LINE_STAT_REG, &val);
833 else
834 ret = abx500_get_register_interruptible(di->dev,
835 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
836 if (ret < 0) {
837 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
838 return ret;
839 }
840
841 /* get the USB type */
842 if (is_ab8500(di->parent))
843 val = (val & AB8500_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
844 else
845 val = (val & AB8505_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
846 ret = ab8500_charger_max_usb_curr(di,
847 (enum ab8500_charger_link_status) val);
848
849 return ret;
850 }
851
852 /**
853 * ab8500_charger_detect_usb_type() - get the type of usb connected
854 * @di: pointer to the ab8500_charger structure
855 *
856 * Detect the type of the plugged USB
857 * Returns error code in case of failure else 0 on success
858 */
ab8500_charger_detect_usb_type(struct ab8500_charger * di)859 static int ab8500_charger_detect_usb_type(struct ab8500_charger *di)
860 {
861 int i, ret;
862 u8 val;
863
864 /*
865 * On getting the VBUS rising edge detect interrupt there
866 * is a 250ms delay after which the register UsbLineStatus
867 * is filled with valid data.
868 */
869 for (i = 0; i < 10; i++) {
870 msleep(250);
871 ret = abx500_get_register_interruptible(di->dev,
872 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG,
873 &val);
874 dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n",
875 __func__, val);
876 if (ret < 0) {
877 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
878 return ret;
879 }
880
881 if (is_ab8500(di->parent))
882 ret = abx500_get_register_interruptible(di->dev,
883 AB8500_USB, AB8500_USB_LINE_STAT_REG, &val);
884 else
885 ret = abx500_get_register_interruptible(di->dev,
886 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
887 if (ret < 0) {
888 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
889 return ret;
890 }
891 dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__,
892 val);
893 /*
894 * Until the IT source register is read the UsbLineStatus
895 * register is not updated, hence doing the same
896 * Revisit this:
897 */
898
899 /* get the USB type */
900 if (is_ab8500(di->parent))
901 val = (val & AB8500_USB_LINK_STATUS) >>
902 USB_LINK_STATUS_SHIFT;
903 else
904 val = (val & AB8505_USB_LINK_STATUS) >>
905 USB_LINK_STATUS_SHIFT;
906 if (val)
907 break;
908 }
909 ret = ab8500_charger_max_usb_curr(di,
910 (enum ab8500_charger_link_status) val);
911
912 return ret;
913 }
914
915 /*
916 * This array maps the raw hex value to charger voltage used by the AB8500
917 * Values taken from the UM0836
918 */
919 static int ab8500_charger_voltage_map[] = {
920 3500 ,
921 3525 ,
922 3550 ,
923 3575 ,
924 3600 ,
925 3625 ,
926 3650 ,
927 3675 ,
928 3700 ,
929 3725 ,
930 3750 ,
931 3775 ,
932 3800 ,
933 3825 ,
934 3850 ,
935 3875 ,
936 3900 ,
937 3925 ,
938 3950 ,
939 3975 ,
940 4000 ,
941 4025 ,
942 4050 ,
943 4060 ,
944 4070 ,
945 4080 ,
946 4090 ,
947 4100 ,
948 4110 ,
949 4120 ,
950 4130 ,
951 4140 ,
952 4150 ,
953 4160 ,
954 4170 ,
955 4180 ,
956 4190 ,
957 4200 ,
958 4210 ,
959 4220 ,
960 4230 ,
961 4240 ,
962 4250 ,
963 4260 ,
964 4270 ,
965 4280 ,
966 4290 ,
967 4300 ,
968 4310 ,
969 4320 ,
970 4330 ,
971 4340 ,
972 4350 ,
973 4360 ,
974 4370 ,
975 4380 ,
976 4390 ,
977 4400 ,
978 4410 ,
979 4420 ,
980 4430 ,
981 4440 ,
982 4450 ,
983 4460 ,
984 4470 ,
985 4480 ,
986 4490 ,
987 4500 ,
988 4510 ,
989 4520 ,
990 4530 ,
991 4540 ,
992 4550 ,
993 4560 ,
994 4570 ,
995 4580 ,
996 4590 ,
997 4600 ,
998 };
999
ab8500_voltage_to_regval(int voltage)1000 static int ab8500_voltage_to_regval(int voltage)
1001 {
1002 int i;
1003
1004 /* Special case for voltage below 3.5V */
1005 if (voltage < ab8500_charger_voltage_map[0])
1006 return LOW_VOLT_REG;
1007
1008 for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) {
1009 if (voltage < ab8500_charger_voltage_map[i])
1010 return i - 1;
1011 }
1012
1013 /* If not last element, return error */
1014 i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1;
1015 if (voltage == ab8500_charger_voltage_map[i])
1016 return i;
1017 else
1018 return -1;
1019 }
1020
ab8500_current_to_regval(struct ab8500_charger * di,int curr)1021 static int ab8500_current_to_regval(struct ab8500_charger *di, int curr)
1022 {
1023 int i;
1024
1025 if (curr < di->bm->chg_output_curr[0])
1026 return 0;
1027
1028 for (i = 0; i < di->bm->n_chg_out_curr; i++) {
1029 if (curr < di->bm->chg_output_curr[i])
1030 return i - 1;
1031 }
1032
1033 /* If not last element, return error */
1034 i = di->bm->n_chg_out_curr - 1;
1035 if (curr == di->bm->chg_output_curr[i])
1036 return i;
1037 else
1038 return -1;
1039 }
1040
ab8500_vbus_in_curr_to_regval(struct ab8500_charger * di,int curr)1041 static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr)
1042 {
1043 int i;
1044
1045 if (curr < di->bm->chg_input_curr[0])
1046 return 0;
1047
1048 for (i = 0; i < di->bm->n_chg_in_curr; i++) {
1049 if (curr < di->bm->chg_input_curr[i])
1050 return i - 1;
1051 }
1052
1053 /* If not last element, return error */
1054 i = di->bm->n_chg_in_curr - 1;
1055 if (curr == di->bm->chg_input_curr[i])
1056 return i;
1057 else
1058 return -1;
1059 }
1060
1061 /**
1062 * ab8500_charger_get_usb_cur() - get usb current
1063 * @di: pointer to the ab8500_charger structre
1064 *
1065 * The usb stack provides the maximum current that can be drawn from
1066 * the standard usb host. This will be in mA.
1067 * This function converts current in mA to a value that can be written
1068 * to the register. Returns -1 if charging is not allowed
1069 */
ab8500_charger_get_usb_cur(struct ab8500_charger * di)1070 static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
1071 {
1072 int ret = 0;
1073 switch (di->usb_state.usb_current) {
1074 case 100:
1075 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P09;
1076 break;
1077 case 200:
1078 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P19;
1079 break;
1080 case 300:
1081 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P29;
1082 break;
1083 case 400:
1084 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P38;
1085 break;
1086 case 500:
1087 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
1088 break;
1089 default:
1090 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
1091 ret = -EPERM;
1092 break;
1093 };
1094 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
1095 return ret;
1096 }
1097
1098 /**
1099 * ab8500_charger_check_continue_stepping() - Check to allow stepping
1100 * @di: pointer to the ab8500_charger structure
1101 * @reg: select what charger register to check
1102 *
1103 * Check if current stepping should be allowed to continue.
1104 * Checks if charger source has not collapsed. If it has, further stepping
1105 * is not allowed.
1106 */
ab8500_charger_check_continue_stepping(struct ab8500_charger * di,int reg)1107 static bool ab8500_charger_check_continue_stepping(struct ab8500_charger *di,
1108 int reg)
1109 {
1110 if (reg == AB8500_USBCH_IPT_CRNTLVL_REG)
1111 return !di->flags.vbus_drop_end;
1112 else
1113 return true;
1114 }
1115
1116 /**
1117 * ab8500_charger_set_current() - set charger current
1118 * @di: pointer to the ab8500_charger structure
1119 * @ich: charger current, in mA
1120 * @reg: select what charger register to set
1121 *
1122 * Set charger current.
1123 * There is no state machine in the AB to step up/down the charger
1124 * current to avoid dips and spikes on MAIN, VBUS and VBAT when
1125 * charging is started. Instead we need to implement
1126 * this charger current step-up/down here.
1127 * Returns error code in case of failure else 0(on success)
1128 */
ab8500_charger_set_current(struct ab8500_charger * di,int ich,int reg)1129 static int ab8500_charger_set_current(struct ab8500_charger *di,
1130 int ich, int reg)
1131 {
1132 int ret = 0;
1133 int curr_index, prev_curr_index, shift_value, i;
1134 u8 reg_value;
1135 u32 step_udelay;
1136 bool no_stepping = false;
1137
1138 atomic_inc(&di->current_stepping_sessions);
1139
1140 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1141 reg, ®_value);
1142 if (ret < 0) {
1143 dev_err(di->dev, "%s read failed\n", __func__);
1144 goto exit_set_current;
1145 }
1146
1147 switch (reg) {
1148 case AB8500_MCH_IPT_CURLVL_REG:
1149 shift_value = MAIN_CH_INPUT_CURR_SHIFT;
1150 prev_curr_index = (reg_value >> shift_value);
1151 curr_index = ab8500_current_to_regval(di, ich);
1152 step_udelay = STEP_UDELAY;
1153 if (!di->ac.charger_connected)
1154 no_stepping = true;
1155 break;
1156 case AB8500_USBCH_IPT_CRNTLVL_REG:
1157 if (is_ab8540(di->parent))
1158 shift_value = AB8540_VBUS_IN_CURR_LIM_SHIFT;
1159 else
1160 shift_value = VBUS_IN_CURR_LIM_SHIFT;
1161 prev_curr_index = (reg_value >> shift_value);
1162 curr_index = ab8500_vbus_in_curr_to_regval(di, ich);
1163 step_udelay = STEP_UDELAY * 100;
1164
1165 if (!di->usb.charger_connected)
1166 no_stepping = true;
1167 break;
1168 case AB8500_CH_OPT_CRNTLVL_REG:
1169 shift_value = 0;
1170 prev_curr_index = (reg_value >> shift_value);
1171 curr_index = ab8500_current_to_regval(di, ich);
1172 step_udelay = STEP_UDELAY;
1173 if (curr_index && (curr_index - prev_curr_index) > 1)
1174 step_udelay *= 100;
1175
1176 if (!di->usb.charger_connected && !di->ac.charger_connected)
1177 no_stepping = true;
1178
1179 break;
1180 default:
1181 dev_err(di->dev, "%s current register not valid\n", __func__);
1182 ret = -ENXIO;
1183 goto exit_set_current;
1184 }
1185
1186 if (curr_index < 0) {
1187 dev_err(di->dev, "requested current limit out-of-range\n");
1188 ret = -ENXIO;
1189 goto exit_set_current;
1190 }
1191
1192 /* only update current if it's been changed */
1193 if (prev_curr_index == curr_index) {
1194 dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n",
1195 __func__, reg);
1196 ret = 0;
1197 goto exit_set_current;
1198 }
1199
1200 dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n",
1201 __func__, ich, reg);
1202
1203 if (no_stepping) {
1204 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1205 reg, (u8)curr_index << shift_value);
1206 if (ret)
1207 dev_err(di->dev, "%s write failed\n", __func__);
1208 } else if (prev_curr_index > curr_index) {
1209 for (i = prev_curr_index - 1; i >= curr_index; i--) {
1210 dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n",
1211 (u8) i << shift_value, reg);
1212 ret = abx500_set_register_interruptible(di->dev,
1213 AB8500_CHARGER, reg, (u8)i << shift_value);
1214 if (ret) {
1215 dev_err(di->dev, "%s write failed\n", __func__);
1216 goto exit_set_current;
1217 }
1218 if (i != curr_index)
1219 usleep_range(step_udelay, step_udelay * 2);
1220 }
1221 } else {
1222 bool allow = true;
1223 for (i = prev_curr_index + 1; i <= curr_index && allow; i++) {
1224 dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n",
1225 (u8)i << shift_value, reg);
1226 ret = abx500_set_register_interruptible(di->dev,
1227 AB8500_CHARGER, reg, (u8)i << shift_value);
1228 if (ret) {
1229 dev_err(di->dev, "%s write failed\n", __func__);
1230 goto exit_set_current;
1231 }
1232 if (i != curr_index)
1233 usleep_range(step_udelay, step_udelay * 2);
1234
1235 allow = ab8500_charger_check_continue_stepping(di, reg);
1236 }
1237 }
1238
1239 exit_set_current:
1240 atomic_dec(&di->current_stepping_sessions);
1241
1242 return ret;
1243 }
1244
1245 /**
1246 * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
1247 * @di: pointer to the ab8500_charger structure
1248 * @ich_in: charger input current limit
1249 *
1250 * Sets the current that can be drawn from the USB host
1251 * Returns error code in case of failure else 0(on success)
1252 */
ab8500_charger_set_vbus_in_curr(struct ab8500_charger * di,int ich_in)1253 static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
1254 int ich_in)
1255 {
1256 int min_value;
1257 int ret;
1258
1259 /* We should always use to lowest current limit */
1260 min_value = min(di->bm->chg_params->usb_curr_max, ich_in);
1261 if (di->max_usb_in_curr.set_max > 0)
1262 min_value = min(di->max_usb_in_curr.set_max, min_value);
1263
1264 if (di->usb_state.usb_current >= 0)
1265 min_value = min(di->usb_state.usb_current, min_value);
1266
1267 switch (min_value) {
1268 case 100:
1269 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1270 min_value = USB_CH_IP_CUR_LVL_0P05;
1271 break;
1272 case 500:
1273 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1274 min_value = USB_CH_IP_CUR_LVL_0P45;
1275 break;
1276 default:
1277 break;
1278 }
1279
1280 dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value);
1281
1282 mutex_lock(&di->usb_ipt_crnt_lock);
1283 ret = ab8500_charger_set_current(di, min_value,
1284 AB8500_USBCH_IPT_CRNTLVL_REG);
1285 mutex_unlock(&di->usb_ipt_crnt_lock);
1286
1287 return ret;
1288 }
1289
1290 /**
1291 * ab8500_charger_set_main_in_curr() - set main charger input current
1292 * @di: pointer to the ab8500_charger structure
1293 * @ich_in: input charger current, in mA
1294 *
1295 * Set main charger input current.
1296 * Returns error code in case of failure else 0(on success)
1297 */
ab8500_charger_set_main_in_curr(struct ab8500_charger * di,int ich_in)1298 static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di,
1299 int ich_in)
1300 {
1301 return ab8500_charger_set_current(di, ich_in,
1302 AB8500_MCH_IPT_CURLVL_REG);
1303 }
1304
1305 /**
1306 * ab8500_charger_set_output_curr() - set charger output current
1307 * @di: pointer to the ab8500_charger structure
1308 * @ich_out: output charger current, in mA
1309 *
1310 * Set charger output current.
1311 * Returns error code in case of failure else 0(on success)
1312 */
ab8500_charger_set_output_curr(struct ab8500_charger * di,int ich_out)1313 static int ab8500_charger_set_output_curr(struct ab8500_charger *di,
1314 int ich_out)
1315 {
1316 return ab8500_charger_set_current(di, ich_out,
1317 AB8500_CH_OPT_CRNTLVL_REG);
1318 }
1319
1320 /**
1321 * ab8500_charger_led_en() - turn on/off chargign led
1322 * @di: pointer to the ab8500_charger structure
1323 * @on: flag to turn on/off the chargign led
1324 *
1325 * Power ON/OFF charging LED indication
1326 * Returns error code in case of failure else 0(on success)
1327 */
ab8500_charger_led_en(struct ab8500_charger * di,int on)1328 static int ab8500_charger_led_en(struct ab8500_charger *di, int on)
1329 {
1330 int ret;
1331
1332 if (on) {
1333 /* Power ON charging LED indicator, set LED current to 5mA */
1334 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1335 AB8500_LED_INDICATOR_PWM_CTRL,
1336 (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA));
1337 if (ret) {
1338 dev_err(di->dev, "Power ON LED failed\n");
1339 return ret;
1340 }
1341 /* LED indicator PWM duty cycle 252/256 */
1342 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1343 AB8500_LED_INDICATOR_PWM_DUTY,
1344 LED_INDICATOR_PWM_DUTY_252_256);
1345 if (ret) {
1346 dev_err(di->dev, "Set LED PWM duty cycle failed\n");
1347 return ret;
1348 }
1349 } else {
1350 /* Power off charging LED indicator */
1351 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1352 AB8500_LED_INDICATOR_PWM_CTRL,
1353 LED_INDICATOR_PWM_DIS);
1354 if (ret) {
1355 dev_err(di->dev, "Power-off LED failed\n");
1356 return ret;
1357 }
1358 }
1359
1360 return ret;
1361 }
1362
1363 /**
1364 * ab8500_charger_ac_en() - enable or disable ac charging
1365 * @di: pointer to the ab8500_charger structure
1366 * @enable: enable/disable flag
1367 * @vset: charging voltage
1368 * @iset: charging current
1369 *
1370 * Enable/Disable AC/Mains charging and turns on/off the charging led
1371 * respectively.
1372 **/
ab8500_charger_ac_en(struct ux500_charger * charger,int enable,int vset,int iset)1373 static int ab8500_charger_ac_en(struct ux500_charger *charger,
1374 int enable, int vset, int iset)
1375 {
1376 int ret;
1377 int volt_index;
1378 int curr_index;
1379 int input_curr_index;
1380 u8 overshoot = 0;
1381
1382 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1383
1384 if (enable) {
1385 /* Check if AC is connected */
1386 if (!di->ac.charger_connected) {
1387 dev_err(di->dev, "AC charger not connected\n");
1388 return -ENXIO;
1389 }
1390
1391 /* Enable AC charging */
1392 dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset);
1393
1394 /*
1395 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1396 * will be triggered everytime we enable the VDD ADC supply.
1397 * This will turn off charging for a short while.
1398 * It can be avoided by having the supply on when
1399 * there is a charger enabled. Normally the VDD ADC supply
1400 * is enabled everytime a GPADC conversion is triggered. We will
1401 * force it to be enabled from this driver to have
1402 * the GPADC module independant of the AB8500 chargers
1403 */
1404 if (!di->vddadc_en_ac) {
1405 ret = regulator_enable(di->regu);
1406 if (ret)
1407 dev_warn(di->dev,
1408 "Failed to enable regulator\n");
1409 else
1410 di->vddadc_en_ac = true;
1411 }
1412
1413 /* Check if the requested voltage or current is valid */
1414 volt_index = ab8500_voltage_to_regval(vset);
1415 curr_index = ab8500_current_to_regval(di, iset);
1416 input_curr_index = ab8500_current_to_regval(di,
1417 di->bm->chg_params->ac_curr_max);
1418 if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
1419 dev_err(di->dev,
1420 "Charger voltage or current too high, "
1421 "charging not started\n");
1422 return -ENXIO;
1423 }
1424
1425 /* ChVoltLevel: maximum battery charging voltage */
1426 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1427 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1428 if (ret) {
1429 dev_err(di->dev, "%s write failed\n", __func__);
1430 return ret;
1431 }
1432 /* MainChInputCurr: current that can be drawn from the charger*/
1433 ret = ab8500_charger_set_main_in_curr(di,
1434 di->bm->chg_params->ac_curr_max);
1435 if (ret) {
1436 dev_err(di->dev, "%s Failed to set MainChInputCurr\n",
1437 __func__);
1438 return ret;
1439 }
1440 /* ChOutputCurentLevel: protected output current */
1441 ret = ab8500_charger_set_output_curr(di, iset);
1442 if (ret) {
1443 dev_err(di->dev, "%s "
1444 "Failed to set ChOutputCurentLevel\n",
1445 __func__);
1446 return ret;
1447 }
1448
1449 /* Check if VBAT overshoot control should be enabled */
1450 if (!di->bm->enable_overshoot)
1451 overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;
1452
1453 /* Enable Main Charger */
1454 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1455 AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot);
1456 if (ret) {
1457 dev_err(di->dev, "%s write failed\n", __func__);
1458 return ret;
1459 }
1460
1461 /* Power on charging LED indication */
1462 ret = ab8500_charger_led_en(di, true);
1463 if (ret < 0)
1464 dev_err(di->dev, "failed to enable LED\n");
1465
1466 di->ac.charger_online = 1;
1467 } else {
1468 /* Disable AC charging */
1469 if (is_ab8500_1p1_or_earlier(di->parent)) {
1470 /*
1471 * For ABB revision 1.0 and 1.1 there is a bug in the
1472 * watchdog logic. That means we have to continously
1473 * kick the charger watchdog even when no charger is
1474 * connected. This is only valid once the AC charger
1475 * has been enabled. This is a bug that is not handled
1476 * by the algorithm and the watchdog have to be kicked
1477 * by the charger driver when the AC charger
1478 * is disabled
1479 */
1480 if (di->ac_conn) {
1481 queue_delayed_work(di->charger_wq,
1482 &di->kick_wd_work,
1483 round_jiffies(WD_KICK_INTERVAL));
1484 }
1485
1486 /*
1487 * We can't turn off charging completely
1488 * due to a bug in AB8500 cut1.
1489 * If we do, charging will not start again.
1490 * That is why we set the lowest voltage
1491 * and current possible
1492 */
1493 ret = abx500_set_register_interruptible(di->dev,
1494 AB8500_CHARGER,
1495 AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5);
1496 if (ret) {
1497 dev_err(di->dev,
1498 "%s write failed\n", __func__);
1499 return ret;
1500 }
1501
1502 ret = ab8500_charger_set_output_curr(di, 0);
1503 if (ret) {
1504 dev_err(di->dev, "%s "
1505 "Failed to set ChOutputCurentLevel\n",
1506 __func__);
1507 return ret;
1508 }
1509 } else {
1510 ret = abx500_set_register_interruptible(di->dev,
1511 AB8500_CHARGER,
1512 AB8500_MCH_CTRL1, 0);
1513 if (ret) {
1514 dev_err(di->dev,
1515 "%s write failed\n", __func__);
1516 return ret;
1517 }
1518 }
1519
1520 ret = ab8500_charger_led_en(di, false);
1521 if (ret < 0)
1522 dev_err(di->dev, "failed to disable LED\n");
1523
1524 di->ac.charger_online = 0;
1525 di->ac.wd_expired = false;
1526
1527 /* Disable regulator if enabled */
1528 if (di->vddadc_en_ac) {
1529 regulator_disable(di->regu);
1530 di->vddadc_en_ac = false;
1531 }
1532
1533 dev_dbg(di->dev, "%s Disabled AC charging\n", __func__);
1534 }
1535 ab8500_power_supply_changed(di, di->ac_chg.psy);
1536
1537 return ret;
1538 }
1539
1540 /**
1541 * ab8500_charger_usb_en() - enable usb charging
1542 * @di: pointer to the ab8500_charger structure
1543 * @enable: enable/disable flag
1544 * @vset: charging voltage
1545 * @ich_out: charger output current
1546 *
1547 * Enable/Disable USB charging and turns on/off the charging led respectively.
1548 * Returns error code in case of failure else 0(on success)
1549 */
ab8500_charger_usb_en(struct ux500_charger * charger,int enable,int vset,int ich_out)1550 static int ab8500_charger_usb_en(struct ux500_charger *charger,
1551 int enable, int vset, int ich_out)
1552 {
1553 int ret;
1554 int volt_index;
1555 int curr_index;
1556 u8 overshoot = 0;
1557
1558 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1559
1560 if (enable) {
1561 /* Check if USB is connected */
1562 if (!di->usb.charger_connected) {
1563 dev_err(di->dev, "USB charger not connected\n");
1564 return -ENXIO;
1565 }
1566
1567 /*
1568 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1569 * will be triggered everytime we enable the VDD ADC supply.
1570 * This will turn off charging for a short while.
1571 * It can be avoided by having the supply on when
1572 * there is a charger enabled. Normally the VDD ADC supply
1573 * is enabled everytime a GPADC conversion is triggered. We will
1574 * force it to be enabled from this driver to have
1575 * the GPADC module independant of the AB8500 chargers
1576 */
1577 if (!di->vddadc_en_usb) {
1578 ret = regulator_enable(di->regu);
1579 if (ret)
1580 dev_warn(di->dev,
1581 "Failed to enable regulator\n");
1582 else
1583 di->vddadc_en_usb = true;
1584 }
1585
1586 /* Enable USB charging */
1587 dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out);
1588
1589 /* Check if the requested voltage or current is valid */
1590 volt_index = ab8500_voltage_to_regval(vset);
1591 curr_index = ab8500_current_to_regval(di, ich_out);
1592 if (volt_index < 0 || curr_index < 0) {
1593 dev_err(di->dev,
1594 "Charger voltage or current too high, "
1595 "charging not started\n");
1596 return -ENXIO;
1597 }
1598
1599 /* ChVoltLevel: max voltage upto which battery can be charged */
1600 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1601 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1602 if (ret) {
1603 dev_err(di->dev, "%s write failed\n", __func__);
1604 return ret;
1605 }
1606 /* Check if VBAT overshoot control should be enabled */
1607 if (!di->bm->enable_overshoot)
1608 overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;
1609
1610 /* Enable USB Charger */
1611 dev_dbg(di->dev,
1612 "Enabling USB with write to AB8500_USBCH_CTRL1_REG\n");
1613 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1614 AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot);
1615 if (ret) {
1616 dev_err(di->dev, "%s write failed\n", __func__);
1617 return ret;
1618 }
1619
1620 /* If success power on charging LED indication */
1621 ret = ab8500_charger_led_en(di, true);
1622 if (ret < 0)
1623 dev_err(di->dev, "failed to enable LED\n");
1624
1625 di->usb.charger_online = 1;
1626
1627 /* USBChInputCurr: current that can be drawn from the usb */
1628 ret = ab8500_charger_set_vbus_in_curr(di,
1629 di->max_usb_in_curr.usb_type_max);
1630 if (ret) {
1631 dev_err(di->dev, "setting USBChInputCurr failed\n");
1632 return ret;
1633 }
1634
1635 /* ChOutputCurentLevel: protected output current */
1636 ret = ab8500_charger_set_output_curr(di, ich_out);
1637 if (ret) {
1638 dev_err(di->dev, "%s "
1639 "Failed to set ChOutputCurentLevel\n",
1640 __func__);
1641 return ret;
1642 }
1643
1644 queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);
1645
1646 } else {
1647 /* Disable USB charging */
1648 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1649 ret = abx500_set_register_interruptible(di->dev,
1650 AB8500_CHARGER,
1651 AB8500_USBCH_CTRL1_REG, 0);
1652 if (ret) {
1653 dev_err(di->dev,
1654 "%s write failed\n", __func__);
1655 return ret;
1656 }
1657
1658 ret = ab8500_charger_led_en(di, false);
1659 if (ret < 0)
1660 dev_err(di->dev, "failed to disable LED\n");
1661 /* USBChInputCurr: current that can be drawn from the usb */
1662 ret = ab8500_charger_set_vbus_in_curr(di, 0);
1663 if (ret) {
1664 dev_err(di->dev, "setting USBChInputCurr failed\n");
1665 return ret;
1666 }
1667
1668 /* ChOutputCurentLevel: protected output current */
1669 ret = ab8500_charger_set_output_curr(di, 0);
1670 if (ret) {
1671 dev_err(di->dev, "%s "
1672 "Failed to reset ChOutputCurentLevel\n",
1673 __func__);
1674 return ret;
1675 }
1676 di->usb.charger_online = 0;
1677 di->usb.wd_expired = false;
1678
1679 /* Disable regulator if enabled */
1680 if (di->vddadc_en_usb) {
1681 regulator_disable(di->regu);
1682 di->vddadc_en_usb = false;
1683 }
1684
1685 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1686
1687 /* Cancel any pending Vbat check work */
1688 cancel_delayed_work(&di->check_vbat_work);
1689
1690 }
1691 ab8500_power_supply_changed(di, di->usb_chg.psy);
1692
1693 return ret;
1694 }
1695
ab8500_external_charger_prepare(struct notifier_block * charger_nb,unsigned long event,void * data)1696 static int ab8500_external_charger_prepare(struct notifier_block *charger_nb,
1697 unsigned long event, void *data)
1698 {
1699 int ret;
1700 struct device *dev = data;
1701 /*Toggle External charger control pin*/
1702 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1703 AB8500_SYS_CHARGER_CONTROL_REG,
1704 EXTERNAL_CHARGER_DISABLE_REG_VAL);
1705 if (ret < 0) {
1706 dev_err(dev, "write reg failed %d\n", ret);
1707 goto out;
1708 }
1709 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1710 AB8500_SYS_CHARGER_CONTROL_REG,
1711 EXTERNAL_CHARGER_ENABLE_REG_VAL);
1712 if (ret < 0)
1713 dev_err(dev, "Write reg failed %d\n", ret);
1714
1715 out:
1716 return ret;
1717 }
1718
1719 /**
1720 * ab8500_charger_usb_check_enable() - enable usb charging
1721 * @charger: pointer to the ux500_charger structure
1722 * @vset: charging voltage
1723 * @iset: charger output current
1724 *
1725 * Check if the VBUS charger has been disconnected and reconnected without
1726 * AB8500 rising an interrupt. Returns 0 on success.
1727 */
ab8500_charger_usb_check_enable(struct ux500_charger * charger,int vset,int iset)1728 static int ab8500_charger_usb_check_enable(struct ux500_charger *charger,
1729 int vset, int iset)
1730 {
1731 u8 usbch_ctrl1 = 0;
1732 int ret = 0;
1733
1734 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1735
1736 if (!di->usb.charger_connected)
1737 return ret;
1738
1739 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1740 AB8500_USBCH_CTRL1_REG, &usbch_ctrl1);
1741 if (ret < 0) {
1742 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1743 return ret;
1744 }
1745 dev_dbg(di->dev, "USB charger ctrl: 0x%02x\n", usbch_ctrl1);
1746
1747 if (!(usbch_ctrl1 & USB_CH_ENA)) {
1748 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1749
1750 ret = abx500_mask_and_set_register_interruptible(di->dev,
1751 AB8500_CHARGER, AB8500_CHARGER_CTRL,
1752 DROP_COUNT_RESET, DROP_COUNT_RESET);
1753 if (ret < 0) {
1754 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1755 return ret;
1756 }
1757
1758 ret = ab8500_charger_usb_en(&di->usb_chg, true, vset, iset);
1759 if (ret < 0) {
1760 dev_err(di->dev, "Failed to enable VBUS charger %d\n",
1761 __LINE__);
1762 return ret;
1763 }
1764 }
1765 return ret;
1766 }
1767
1768 /**
1769 * ab8500_charger_ac_check_enable() - enable usb charging
1770 * @charger: pointer to the ux500_charger structure
1771 * @vset: charging voltage
1772 * @iset: charger output current
1773 *
1774 * Check if the AC charger has been disconnected and reconnected without
1775 * AB8500 rising an interrupt. Returns 0 on success.
1776 */
ab8500_charger_ac_check_enable(struct ux500_charger * charger,int vset,int iset)1777 static int ab8500_charger_ac_check_enable(struct ux500_charger *charger,
1778 int vset, int iset)
1779 {
1780 u8 mainch_ctrl1 = 0;
1781 int ret = 0;
1782
1783 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1784
1785 if (!di->ac.charger_connected)
1786 return ret;
1787
1788 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1789 AB8500_MCH_CTRL1, &mainch_ctrl1);
1790 if (ret < 0) {
1791 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1792 return ret;
1793 }
1794 dev_dbg(di->dev, "AC charger ctrl: 0x%02x\n", mainch_ctrl1);
1795
1796 if (!(mainch_ctrl1 & MAIN_CH_ENA)) {
1797 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1798
1799 ret = abx500_mask_and_set_register_interruptible(di->dev,
1800 AB8500_CHARGER, AB8500_CHARGER_CTRL,
1801 DROP_COUNT_RESET, DROP_COUNT_RESET);
1802
1803 if (ret < 0) {
1804 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1805 return ret;
1806 }
1807
1808 ret = ab8500_charger_ac_en(&di->usb_chg, true, vset, iset);
1809 if (ret < 0) {
1810 dev_err(di->dev, "failed to enable AC charger %d\n",
1811 __LINE__);
1812 return ret;
1813 }
1814 }
1815 return ret;
1816 }
1817
1818 /**
1819 * ab8500_charger_watchdog_kick() - kick charger watchdog
1820 * @di: pointer to the ab8500_charger structure
1821 *
1822 * Kick charger watchdog
1823 * Returns error code in case of failure else 0(on success)
1824 */
ab8500_charger_watchdog_kick(struct ux500_charger * charger)1825 static int ab8500_charger_watchdog_kick(struct ux500_charger *charger)
1826 {
1827 int ret;
1828 struct ab8500_charger *di;
1829
1830 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
1831 di = to_ab8500_charger_ac_device_info(charger);
1832 else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1833 di = to_ab8500_charger_usb_device_info(charger);
1834 else
1835 return -ENXIO;
1836
1837 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1838 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
1839 if (ret)
1840 dev_err(di->dev, "Failed to kick WD!\n");
1841
1842 return ret;
1843 }
1844
1845 /**
1846 * ab8500_charger_update_charger_current() - update charger current
1847 * @di: pointer to the ab8500_charger structure
1848 *
1849 * Update the charger output current for the specified charger
1850 * Returns error code in case of failure else 0(on success)
1851 */
ab8500_charger_update_charger_current(struct ux500_charger * charger,int ich_out)1852 static int ab8500_charger_update_charger_current(struct ux500_charger *charger,
1853 int ich_out)
1854 {
1855 int ret;
1856 struct ab8500_charger *di;
1857
1858 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
1859 di = to_ab8500_charger_ac_device_info(charger);
1860 else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1861 di = to_ab8500_charger_usb_device_info(charger);
1862 else
1863 return -ENXIO;
1864
1865 ret = ab8500_charger_set_output_curr(di, ich_out);
1866 if (ret) {
1867 dev_err(di->dev, "%s "
1868 "Failed to set ChOutputCurentLevel\n",
1869 __func__);
1870 return ret;
1871 }
1872
1873 /* Reset the main and usb drop input current measurement counter */
1874 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1875 AB8500_CHARGER_CTRL, DROP_COUNT_RESET);
1876 if (ret) {
1877 dev_err(di->dev, "%s write failed\n", __func__);
1878 return ret;
1879 }
1880
1881 return ret;
1882 }
1883
1884 /**
1885 * ab8540_charger_power_path_enable() - enable usb power path mode
1886 * @charger: pointer to the ux500_charger structure
1887 * @enable: enable/disable flag
1888 *
1889 * Enable or disable the power path for usb mode
1890 * Returns error code in case of failure else 0(on success)
1891 */
ab8540_charger_power_path_enable(struct ux500_charger * charger,bool enable)1892 static int ab8540_charger_power_path_enable(struct ux500_charger *charger,
1893 bool enable)
1894 {
1895 int ret;
1896 struct ab8500_charger *di;
1897
1898 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1899 di = to_ab8500_charger_usb_device_info(charger);
1900 else
1901 return -ENXIO;
1902
1903 ret = abx500_mask_and_set_register_interruptible(di->dev,
1904 AB8500_CHARGER, AB8540_USB_PP_MODE_REG,
1905 BUS_POWER_PATH_MODE_ENA, enable);
1906 if (ret) {
1907 dev_err(di->dev, "%s write failed\n", __func__);
1908 return ret;
1909 }
1910
1911 return ret;
1912 }
1913
1914
1915 /**
1916 * ab8540_charger_usb_pre_chg_enable() - enable usb pre change
1917 * @charger: pointer to the ux500_charger structure
1918 * @enable: enable/disable flag
1919 *
1920 * Enable or disable the pre-chage for usb mode
1921 * Returns error code in case of failure else 0(on success)
1922 */
ab8540_charger_usb_pre_chg_enable(struct ux500_charger * charger,bool enable)1923 static int ab8540_charger_usb_pre_chg_enable(struct ux500_charger *charger,
1924 bool enable)
1925 {
1926 int ret;
1927 struct ab8500_charger *di;
1928
1929 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1930 di = to_ab8500_charger_usb_device_info(charger);
1931 else
1932 return -ENXIO;
1933
1934 ret = abx500_mask_and_set_register_interruptible(di->dev,
1935 AB8500_CHARGER, AB8540_USB_PP_CHR_REG,
1936 BUS_POWER_PATH_PRECHG_ENA, enable);
1937 if (ret) {
1938 dev_err(di->dev, "%s write failed\n", __func__);
1939 return ret;
1940 }
1941
1942 return ret;
1943 }
1944
ab8500_charger_get_ext_psy_data(struct device * dev,void * data)1945 static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
1946 {
1947 struct power_supply *psy;
1948 struct power_supply *ext;
1949 struct ab8500_charger *di;
1950 union power_supply_propval ret;
1951 int i, j;
1952 bool psy_found = false;
1953 struct ux500_charger *usb_chg;
1954
1955 usb_chg = (struct ux500_charger *)data;
1956 psy = usb_chg->psy;
1957
1958 di = to_ab8500_charger_usb_device_info(usb_chg);
1959
1960 ext = dev_get_drvdata(dev);
1961
1962 /* For all psy where the driver name appears in any supplied_to */
1963 for (i = 0; i < ext->num_supplicants; i++) {
1964 if (!strcmp(ext->supplied_to[i], psy->desc->name))
1965 psy_found = true;
1966 }
1967
1968 if (!psy_found)
1969 return 0;
1970
1971 /* Go through all properties for the psy */
1972 for (j = 0; j < ext->desc->num_properties; j++) {
1973 enum power_supply_property prop;
1974 prop = ext->desc->properties[j];
1975
1976 if (power_supply_get_property(ext, prop, &ret))
1977 continue;
1978
1979 switch (prop) {
1980 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1981 switch (ext->desc->type) {
1982 case POWER_SUPPLY_TYPE_BATTERY:
1983 di->vbat = ret.intval / 1000;
1984 break;
1985 default:
1986 break;
1987 }
1988 break;
1989 default:
1990 break;
1991 }
1992 }
1993 return 0;
1994 }
1995
1996 /**
1997 * ab8500_charger_check_vbat_work() - keep vbus current within spec
1998 * @work pointer to the work_struct structure
1999 *
2000 * Due to a asic bug it is necessary to lower the input current to the vbus
2001 * charger when charging with at some specific levels. This issue is only valid
2002 * for below a certain battery voltage. This function makes sure that the
2003 * the allowed current limit isn't exceeded.
2004 */
ab8500_charger_check_vbat_work(struct work_struct * work)2005 static void ab8500_charger_check_vbat_work(struct work_struct *work)
2006 {
2007 int t = 10;
2008 struct ab8500_charger *di = container_of(work,
2009 struct ab8500_charger, check_vbat_work.work);
2010
2011 class_for_each_device(power_supply_class, NULL,
2012 di->usb_chg.psy, ab8500_charger_get_ext_psy_data);
2013
2014 /* First run old_vbat is 0. */
2015 if (di->old_vbat == 0)
2016 di->old_vbat = di->vbat;
2017
2018 if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED &&
2019 di->vbat <= VBAT_TRESH_IP_CUR_RED) ||
2020 (di->old_vbat > VBAT_TRESH_IP_CUR_RED &&
2021 di->vbat > VBAT_TRESH_IP_CUR_RED))) {
2022
2023 dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d,"
2024 " old: %d\n", di->max_usb_in_curr.usb_type_max,
2025 di->vbat, di->old_vbat);
2026 ab8500_charger_set_vbus_in_curr(di,
2027 di->max_usb_in_curr.usb_type_max);
2028 power_supply_changed(di->usb_chg.psy);
2029 }
2030
2031 di->old_vbat = di->vbat;
2032
2033 /*
2034 * No need to check the battery voltage every second when not close to
2035 * the threshold.
2036 */
2037 if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) &&
2038 (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100)))
2039 t = 1;
2040
2041 queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ);
2042 }
2043
2044 /**
2045 * ab8500_charger_check_hw_failure_work() - check main charger failure
2046 * @work: pointer to the work_struct structure
2047 *
2048 * Work queue function for checking the main charger status
2049 */
ab8500_charger_check_hw_failure_work(struct work_struct * work)2050 static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
2051 {
2052 int ret;
2053 u8 reg_value;
2054
2055 struct ab8500_charger *di = container_of(work,
2056 struct ab8500_charger, check_hw_failure_work.work);
2057
2058 /* Check if the status bits for HW failure is still active */
2059 if (di->flags.mainextchnotok) {
2060 ret = abx500_get_register_interruptible(di->dev,
2061 AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value);
2062 if (ret < 0) {
2063 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2064 return;
2065 }
2066 if (!(reg_value & MAIN_CH_NOK)) {
2067 di->flags.mainextchnotok = false;
2068 ab8500_power_supply_changed(di, di->ac_chg.psy);
2069 }
2070 }
2071 if (di->flags.vbus_ovv) {
2072 ret = abx500_get_register_interruptible(di->dev,
2073 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG,
2074 ®_value);
2075 if (ret < 0) {
2076 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2077 return;
2078 }
2079 if (!(reg_value & VBUS_OVV_TH)) {
2080 di->flags.vbus_ovv = false;
2081 ab8500_power_supply_changed(di, di->usb_chg.psy);
2082 }
2083 }
2084 /* If we still have a failure, schedule a new check */
2085 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
2086 queue_delayed_work(di->charger_wq,
2087 &di->check_hw_failure_work, round_jiffies(HZ));
2088 }
2089 }
2090
2091 /**
2092 * ab8500_charger_kick_watchdog_work() - kick the watchdog
2093 * @work: pointer to the work_struct structure
2094 *
2095 * Work queue function for kicking the charger watchdog.
2096 *
2097 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
2098 * logic. That means we have to continously kick the charger
2099 * watchdog even when no charger is connected. This is only
2100 * valid once the AC charger has been enabled. This is
2101 * a bug that is not handled by the algorithm and the
2102 * watchdog have to be kicked by the charger driver
2103 * when the AC charger is disabled
2104 */
ab8500_charger_kick_watchdog_work(struct work_struct * work)2105 static void ab8500_charger_kick_watchdog_work(struct work_struct *work)
2106 {
2107 int ret;
2108
2109 struct ab8500_charger *di = container_of(work,
2110 struct ab8500_charger, kick_wd_work.work);
2111
2112 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
2113 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
2114 if (ret)
2115 dev_err(di->dev, "Failed to kick WD!\n");
2116
2117 /* Schedule a new watchdog kick */
2118 queue_delayed_work(di->charger_wq,
2119 &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL));
2120 }
2121
2122 /**
2123 * ab8500_charger_ac_work() - work to get and set main charger status
2124 * @work: pointer to the work_struct structure
2125 *
2126 * Work queue function for checking the main charger status
2127 */
ab8500_charger_ac_work(struct work_struct * work)2128 static void ab8500_charger_ac_work(struct work_struct *work)
2129 {
2130 int ret;
2131
2132 struct ab8500_charger *di = container_of(work,
2133 struct ab8500_charger, ac_work);
2134
2135 /*
2136 * Since we can't be sure that the events are received
2137 * synchronously, we have the check if the main charger is
2138 * connected by reading the status register
2139 */
2140 ret = ab8500_charger_detect_chargers(di, false);
2141 if (ret < 0)
2142 return;
2143
2144 if (ret & AC_PW_CONN) {
2145 di->ac.charger_connected = 1;
2146 di->ac_conn = true;
2147 } else {
2148 di->ac.charger_connected = 0;
2149 }
2150
2151 ab8500_power_supply_changed(di, di->ac_chg.psy);
2152 sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
2153 }
2154
ab8500_charger_usb_attached_work(struct work_struct * work)2155 static void ab8500_charger_usb_attached_work(struct work_struct *work)
2156 {
2157 struct ab8500_charger *di = container_of(work,
2158 struct ab8500_charger,
2159 usb_charger_attached_work.work);
2160 int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC);
2161 int ret, i;
2162 u8 statval;
2163
2164 for (i = 0; i < 10; i++) {
2165 ret = abx500_get_register_interruptible(di->dev,
2166 AB8500_CHARGER,
2167 AB8500_CH_USBCH_STAT1_REG,
2168 &statval);
2169 if (ret < 0) {
2170 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2171 goto reschedule;
2172 }
2173 if ((statval & usbch) != usbch)
2174 goto reschedule;
2175
2176 msleep(CHARGER_STATUS_POLL);
2177 }
2178
2179 ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0);
2180
2181 mutex_lock(&di->charger_attached_mutex);
2182 mutex_unlock(&di->charger_attached_mutex);
2183
2184 return;
2185
2186 reschedule:
2187 queue_delayed_work(di->charger_wq,
2188 &di->usb_charger_attached_work,
2189 HZ);
2190 }
2191
ab8500_charger_ac_attached_work(struct work_struct * work)2192 static void ab8500_charger_ac_attached_work(struct work_struct *work)
2193 {
2194
2195 struct ab8500_charger *di = container_of(work,
2196 struct ab8500_charger,
2197 ac_charger_attached_work.work);
2198 int mainch = (MAIN_CH_STATUS2_MAINCHGDROP |
2199 MAIN_CH_STATUS2_MAINCHARGERDETDBNC);
2200 int ret, i;
2201 u8 statval;
2202
2203 for (i = 0; i < 10; i++) {
2204 ret = abx500_get_register_interruptible(di->dev,
2205 AB8500_CHARGER,
2206 AB8500_CH_STATUS2_REG,
2207 &statval);
2208 if (ret < 0) {
2209 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2210 goto reschedule;
2211 }
2212
2213 if ((statval & mainch) != mainch)
2214 goto reschedule;
2215
2216 msleep(CHARGER_STATUS_POLL);
2217 }
2218
2219 ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0);
2220 queue_work(di->charger_wq, &di->ac_work);
2221
2222 mutex_lock(&di->charger_attached_mutex);
2223 mutex_unlock(&di->charger_attached_mutex);
2224
2225 return;
2226
2227 reschedule:
2228 queue_delayed_work(di->charger_wq,
2229 &di->ac_charger_attached_work,
2230 HZ);
2231 }
2232
2233 /**
2234 * ab8500_charger_detect_usb_type_work() - work to detect USB type
2235 * @work: Pointer to the work_struct structure
2236 *
2237 * Detect the type of USB plugged
2238 */
ab8500_charger_detect_usb_type_work(struct work_struct * work)2239 static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
2240 {
2241 int ret;
2242
2243 struct ab8500_charger *di = container_of(work,
2244 struct ab8500_charger, detect_usb_type_work);
2245
2246 /*
2247 * Since we can't be sure that the events are received
2248 * synchronously, we have the check if is
2249 * connected by reading the status register
2250 */
2251 ret = ab8500_charger_detect_chargers(di, false);
2252 if (ret < 0)
2253 return;
2254
2255 if (!(ret & USB_PW_CONN)) {
2256 dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__);
2257 di->vbus_detected = false;
2258 ab8500_charger_set_usb_connected(di, false);
2259 ab8500_power_supply_changed(di, di->usb_chg.psy);
2260 } else {
2261 dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__);
2262 di->vbus_detected = true;
2263
2264 if (is_ab8500_1p1_or_earlier(di->parent)) {
2265 ret = ab8500_charger_detect_usb_type(di);
2266 if (!ret) {
2267 ab8500_charger_set_usb_connected(di, true);
2268 ab8500_power_supply_changed(di,
2269 di->usb_chg.psy);
2270 }
2271 } else {
2272 /*
2273 * For ABB cut2.0 and onwards we have an IRQ,
2274 * USB_LINK_STATUS that will be triggered when the USB
2275 * link status changes. The exception is USB connected
2276 * during startup. Then we don't get a
2277 * USB_LINK_STATUS IRQ
2278 */
2279 if (di->vbus_detected_start) {
2280 di->vbus_detected_start = false;
2281 ret = ab8500_charger_detect_usb_type(di);
2282 if (!ret) {
2283 ab8500_charger_set_usb_connected(di,
2284 true);
2285 ab8500_power_supply_changed(di,
2286 di->usb_chg.psy);
2287 }
2288 }
2289 }
2290 }
2291 }
2292
2293 /**
2294 * ab8500_charger_usb_link_attach_work() - work to detect USB type
2295 * @work: pointer to the work_struct structure
2296 *
2297 * Detect the type of USB plugged
2298 */
ab8500_charger_usb_link_attach_work(struct work_struct * work)2299 static void ab8500_charger_usb_link_attach_work(struct work_struct *work)
2300 {
2301 struct ab8500_charger *di =
2302 container_of(work, struct ab8500_charger, attach_work.work);
2303 int ret;
2304
2305 /* Update maximum input current if USB enumeration is not detected */
2306 if (!di->usb.charger_online) {
2307 ret = ab8500_charger_set_vbus_in_curr(di,
2308 di->max_usb_in_curr.usb_type_max);
2309 if (ret)
2310 return;
2311 }
2312
2313 ab8500_charger_set_usb_connected(di, true);
2314 ab8500_power_supply_changed(di, di->usb_chg.psy);
2315 }
2316
2317 /**
2318 * ab8500_charger_usb_link_status_work() - work to detect USB type
2319 * @work: pointer to the work_struct structure
2320 *
2321 * Detect the type of USB plugged
2322 */
ab8500_charger_usb_link_status_work(struct work_struct * work)2323 static void ab8500_charger_usb_link_status_work(struct work_struct *work)
2324 {
2325 int detected_chargers;
2326 int ret;
2327 u8 val;
2328 u8 link_status;
2329
2330 struct ab8500_charger *di = container_of(work,
2331 struct ab8500_charger, usb_link_status_work);
2332
2333 /*
2334 * Since we can't be sure that the events are received
2335 * synchronously, we have the check if is
2336 * connected by reading the status register
2337 */
2338 detected_chargers = ab8500_charger_detect_chargers(di, false);
2339 if (detected_chargers < 0)
2340 return;
2341
2342 /*
2343 * Some chargers that breaks the USB spec is
2344 * identified as invalid by AB8500 and it refuse
2345 * to start the charging process. but by jumping
2346 * thru a few hoops it can be forced to start.
2347 */
2348 if (is_ab8500(di->parent))
2349 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2350 AB8500_USB_LINE_STAT_REG, &val);
2351 else
2352 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2353 AB8500_USB_LINK1_STAT_REG, &val);
2354
2355 if (ret >= 0)
2356 dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val);
2357 else
2358 dev_dbg(di->dev, "Error reading USB link status\n");
2359
2360 if (is_ab8500(di->parent))
2361 link_status = AB8500_USB_LINK_STATUS;
2362 else
2363 link_status = AB8505_USB_LINK_STATUS;
2364
2365 if (detected_chargers & USB_PW_CONN) {
2366 if (((val & link_status) >> USB_LINK_STATUS_SHIFT) ==
2367 USB_STAT_NOT_VALID_LINK &&
2368 di->invalid_charger_detect_state == 0) {
2369 dev_dbg(di->dev,
2370 "Invalid charger detected, state= 0\n");
2371 /*Enable charger*/
2372 abx500_mask_and_set_register_interruptible(di->dev,
2373 AB8500_CHARGER, AB8500_USBCH_CTRL1_REG,
2374 USB_CH_ENA, USB_CH_ENA);
2375 /*Enable charger detection*/
2376 abx500_mask_and_set_register_interruptible(di->dev,
2377 AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2378 USB_CH_DET, USB_CH_DET);
2379 di->invalid_charger_detect_state = 1;
2380 /*exit and wait for new link status interrupt.*/
2381 return;
2382
2383 }
2384 if (di->invalid_charger_detect_state == 1) {
2385 dev_dbg(di->dev,
2386 "Invalid charger detected, state= 1\n");
2387 /*Stop charger detection*/
2388 abx500_mask_and_set_register_interruptible(di->dev,
2389 AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2390 USB_CH_DET, 0x00);
2391 /*Check link status*/
2392 if (is_ab8500(di->parent))
2393 ret = abx500_get_register_interruptible(di->dev,
2394 AB8500_USB, AB8500_USB_LINE_STAT_REG,
2395 &val);
2396 else
2397 ret = abx500_get_register_interruptible(di->dev,
2398 AB8500_USB, AB8500_USB_LINK1_STAT_REG,
2399 &val);
2400
2401 dev_dbg(di->dev, "USB link status= 0x%02x\n",
2402 (val & link_status) >> USB_LINK_STATUS_SHIFT);
2403 di->invalid_charger_detect_state = 2;
2404 }
2405 } else {
2406 di->invalid_charger_detect_state = 0;
2407 }
2408
2409 if (!(detected_chargers & USB_PW_CONN)) {
2410 di->vbus_detected = false;
2411 ab8500_charger_set_usb_connected(di, false);
2412 ab8500_power_supply_changed(di, di->usb_chg.psy);
2413 return;
2414 }
2415
2416 dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__);
2417 di->vbus_detected = true;
2418 ret = ab8500_charger_read_usb_type(di);
2419 if (ret) {
2420 if (ret == -ENXIO) {
2421 /* No valid charger type detected */
2422 ab8500_charger_set_usb_connected(di, false);
2423 ab8500_power_supply_changed(di, di->usb_chg.psy);
2424 }
2425 return;
2426 }
2427
2428 if (di->usb_device_is_unrecognised) {
2429 dev_dbg(di->dev,
2430 "Potential Legacy Charger device. "
2431 "Delay work for %d msec for USB enum "
2432 "to finish",
2433 WAIT_ACA_RID_ENUMERATION);
2434 queue_delayed_work(di->charger_wq,
2435 &di->attach_work,
2436 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2437 } else if (di->is_aca_rid == 1) {
2438 /* Only wait once */
2439 di->is_aca_rid++;
2440 dev_dbg(di->dev,
2441 "%s Wait %d msec for USB enum to finish",
2442 __func__, WAIT_ACA_RID_ENUMERATION);
2443 queue_delayed_work(di->charger_wq,
2444 &di->attach_work,
2445 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2446 } else {
2447 queue_delayed_work(di->charger_wq,
2448 &di->attach_work,
2449 0);
2450 }
2451 }
2452
ab8500_charger_usb_state_changed_work(struct work_struct * work)2453 static void ab8500_charger_usb_state_changed_work(struct work_struct *work)
2454 {
2455 int ret;
2456 unsigned long flags;
2457
2458 struct ab8500_charger *di = container_of(work,
2459 struct ab8500_charger, usb_state_changed_work.work);
2460
2461 if (!di->vbus_detected) {
2462 dev_dbg(di->dev,
2463 "%s !di->vbus_detected\n",
2464 __func__);
2465 return;
2466 }
2467
2468 spin_lock_irqsave(&di->usb_state.usb_lock, flags);
2469 di->usb_state.state = di->usb_state.state_tmp;
2470 di->usb_state.usb_current = di->usb_state.usb_current_tmp;
2471 spin_unlock_irqrestore(&di->usb_state.usb_lock, flags);
2472
2473 dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n",
2474 __func__, di->usb_state.state, di->usb_state.usb_current);
2475
2476 switch (di->usb_state.state) {
2477 case AB8500_BM_USB_STATE_RESET_HS:
2478 case AB8500_BM_USB_STATE_RESET_FS:
2479 case AB8500_BM_USB_STATE_SUSPEND:
2480 case AB8500_BM_USB_STATE_MAX:
2481 ab8500_charger_set_usb_connected(di, false);
2482 ab8500_power_supply_changed(di, di->usb_chg.psy);
2483 break;
2484
2485 case AB8500_BM_USB_STATE_RESUME:
2486 /*
2487 * when suspend->resume there should be delay
2488 * of 1sec for enabling charging
2489 */
2490 msleep(1000);
2491 /* Intentional fall through */
2492 case AB8500_BM_USB_STATE_CONFIGURED:
2493 /*
2494 * USB is configured, enable charging with the charging
2495 * input current obtained from USB driver
2496 */
2497 if (!ab8500_charger_get_usb_cur(di)) {
2498 /* Update maximum input current */
2499 ret = ab8500_charger_set_vbus_in_curr(di,
2500 di->max_usb_in_curr.usb_type_max);
2501 if (ret)
2502 return;
2503
2504 ab8500_charger_set_usb_connected(di, true);
2505 ab8500_power_supply_changed(di, di->usb_chg.psy);
2506 }
2507 break;
2508
2509 default:
2510 break;
2511 };
2512 }
2513
2514 /**
2515 * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status
2516 * @work: pointer to the work_struct structure
2517 *
2518 * Work queue function for checking the USB charger Not OK status
2519 */
ab8500_charger_check_usbchargernotok_work(struct work_struct * work)2520 static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work)
2521 {
2522 int ret;
2523 u8 reg_value;
2524 bool prev_status;
2525
2526 struct ab8500_charger *di = container_of(work,
2527 struct ab8500_charger, check_usbchgnotok_work.work);
2528
2529 /* Check if the status bit for usbchargernotok is still active */
2530 ret = abx500_get_register_interruptible(di->dev,
2531 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value);
2532 if (ret < 0) {
2533 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2534 return;
2535 }
2536 prev_status = di->flags.usbchargernotok;
2537
2538 if (reg_value & VBUS_CH_NOK) {
2539 di->flags.usbchargernotok = true;
2540 /* Check again in 1sec */
2541 queue_delayed_work(di->charger_wq,
2542 &di->check_usbchgnotok_work, HZ);
2543 } else {
2544 di->flags.usbchargernotok = false;
2545 di->flags.vbus_collapse = false;
2546 }
2547
2548 if (prev_status != di->flags.usbchargernotok)
2549 ab8500_power_supply_changed(di, di->usb_chg.psy);
2550 }
2551
2552 /**
2553 * ab8500_charger_check_main_thermal_prot_work() - check main thermal status
2554 * @work: pointer to the work_struct structure
2555 *
2556 * Work queue function for checking the Main thermal prot status
2557 */
ab8500_charger_check_main_thermal_prot_work(struct work_struct * work)2558 static void ab8500_charger_check_main_thermal_prot_work(
2559 struct work_struct *work)
2560 {
2561 int ret;
2562 u8 reg_value;
2563
2564 struct ab8500_charger *di = container_of(work,
2565 struct ab8500_charger, check_main_thermal_prot_work);
2566
2567 /* Check if the status bit for main_thermal_prot is still active */
2568 ret = abx500_get_register_interruptible(di->dev,
2569 AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value);
2570 if (ret < 0) {
2571 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2572 return;
2573 }
2574 if (reg_value & MAIN_CH_TH_PROT)
2575 di->flags.main_thermal_prot = true;
2576 else
2577 di->flags.main_thermal_prot = false;
2578
2579 ab8500_power_supply_changed(di, di->ac_chg.psy);
2580 }
2581
2582 /**
2583 * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status
2584 * @work: pointer to the work_struct structure
2585 *
2586 * Work queue function for checking the USB thermal prot status
2587 */
ab8500_charger_check_usb_thermal_prot_work(struct work_struct * work)2588 static void ab8500_charger_check_usb_thermal_prot_work(
2589 struct work_struct *work)
2590 {
2591 int ret;
2592 u8 reg_value;
2593
2594 struct ab8500_charger *di = container_of(work,
2595 struct ab8500_charger, check_usb_thermal_prot_work);
2596
2597 /* Check if the status bit for usb_thermal_prot is still active */
2598 ret = abx500_get_register_interruptible(di->dev,
2599 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value);
2600 if (ret < 0) {
2601 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2602 return;
2603 }
2604 if (reg_value & USB_CH_TH_PROT)
2605 di->flags.usb_thermal_prot = true;
2606 else
2607 di->flags.usb_thermal_prot = false;
2608
2609 ab8500_power_supply_changed(di, di->usb_chg.psy);
2610 }
2611
2612 /**
2613 * ab8500_charger_mainchunplugdet_handler() - main charger unplugged
2614 * @irq: interrupt number
2615 * @_di: pointer to the ab8500_charger structure
2616 *
2617 * Returns IRQ status(IRQ_HANDLED)
2618 */
ab8500_charger_mainchunplugdet_handler(int irq,void * _di)2619 static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di)
2620 {
2621 struct ab8500_charger *di = _di;
2622
2623 dev_dbg(di->dev, "Main charger unplugged\n");
2624 queue_work(di->charger_wq, &di->ac_work);
2625
2626 cancel_delayed_work_sync(&di->ac_charger_attached_work);
2627 mutex_lock(&di->charger_attached_mutex);
2628 mutex_unlock(&di->charger_attached_mutex);
2629
2630 return IRQ_HANDLED;
2631 }
2632
2633 /**
2634 * ab8500_charger_mainchplugdet_handler() - main charger plugged
2635 * @irq: interrupt number
2636 * @_di: pointer to the ab8500_charger structure
2637 *
2638 * Returns IRQ status(IRQ_HANDLED)
2639 */
ab8500_charger_mainchplugdet_handler(int irq,void * _di)2640 static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di)
2641 {
2642 struct ab8500_charger *di = _di;
2643
2644 dev_dbg(di->dev, "Main charger plugged\n");
2645 queue_work(di->charger_wq, &di->ac_work);
2646
2647 mutex_lock(&di->charger_attached_mutex);
2648 mutex_unlock(&di->charger_attached_mutex);
2649
2650 if (is_ab8500(di->parent))
2651 queue_delayed_work(di->charger_wq,
2652 &di->ac_charger_attached_work,
2653 HZ);
2654 return IRQ_HANDLED;
2655 }
2656
2657 /**
2658 * ab8500_charger_mainextchnotok_handler() - main charger not ok
2659 * @irq: interrupt number
2660 * @_di: pointer to the ab8500_charger structure
2661 *
2662 * Returns IRQ status(IRQ_HANDLED)
2663 */
ab8500_charger_mainextchnotok_handler(int irq,void * _di)2664 static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di)
2665 {
2666 struct ab8500_charger *di = _di;
2667
2668 dev_dbg(di->dev, "Main charger not ok\n");
2669 di->flags.mainextchnotok = true;
2670 ab8500_power_supply_changed(di, di->ac_chg.psy);
2671
2672 /* Schedule a new HW failure check */
2673 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2674
2675 return IRQ_HANDLED;
2676 }
2677
2678 /**
2679 * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger
2680 * thermal protection threshold
2681 * @irq: interrupt number
2682 * @_di: pointer to the ab8500_charger structure
2683 *
2684 * Returns IRQ status(IRQ_HANDLED)
2685 */
ab8500_charger_mainchthprotr_handler(int irq,void * _di)2686 static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di)
2687 {
2688 struct ab8500_charger *di = _di;
2689
2690 dev_dbg(di->dev,
2691 "Die temp above Main charger thermal protection threshold\n");
2692 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2693
2694 return IRQ_HANDLED;
2695 }
2696
2697 /**
2698 * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger
2699 * thermal protection threshold
2700 * @irq: interrupt number
2701 * @_di: pointer to the ab8500_charger structure
2702 *
2703 * Returns IRQ status(IRQ_HANDLED)
2704 */
ab8500_charger_mainchthprotf_handler(int irq,void * _di)2705 static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di)
2706 {
2707 struct ab8500_charger *di = _di;
2708
2709 dev_dbg(di->dev,
2710 "Die temp ok for Main charger thermal protection threshold\n");
2711 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2712
2713 return IRQ_HANDLED;
2714 }
2715
ab8500_charger_vbus_drop_end_work(struct work_struct * work)2716 static void ab8500_charger_vbus_drop_end_work(struct work_struct *work)
2717 {
2718 struct ab8500_charger *di = container_of(work,
2719 struct ab8500_charger, vbus_drop_end_work.work);
2720 int ret, curr;
2721 u8 reg_value;
2722
2723 di->flags.vbus_drop_end = false;
2724
2725 /* Reset the drop counter */
2726 abx500_set_register_interruptible(di->dev,
2727 AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01);
2728
2729 if (is_ab8540(di->parent))
2730 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
2731 AB8540_CH_USBCH_STAT3_REG, ®_value);
2732 else
2733 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
2734 AB8500_CH_USBCH_STAT2_REG, ®_value);
2735 if (ret < 0) {
2736 dev_err(di->dev, "%s read failed\n", __func__);
2737 return;
2738 }
2739
2740 if (is_ab8540(di->parent))
2741 curr = di->bm->chg_input_curr[
2742 reg_value & AB8540_AUTO_VBUS_IN_CURR_MASK];
2743 else
2744 curr = di->bm->chg_input_curr[
2745 reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT];
2746
2747 if (di->max_usb_in_curr.calculated_max != curr) {
2748 /* USB source is collapsing */
2749 di->max_usb_in_curr.calculated_max = curr;
2750 dev_dbg(di->dev,
2751 "VBUS input current limiting to %d mA\n",
2752 di->max_usb_in_curr.calculated_max);
2753 } else {
2754 /*
2755 * USB source can not give more than this amount.
2756 * Taking more will collapse the source.
2757 */
2758 di->max_usb_in_curr.set_max =
2759 di->max_usb_in_curr.calculated_max;
2760 dev_dbg(di->dev,
2761 "VBUS input current limited to %d mA\n",
2762 di->max_usb_in_curr.set_max);
2763 }
2764
2765 if (di->usb.charger_connected)
2766 ab8500_charger_set_vbus_in_curr(di,
2767 di->max_usb_in_curr.usb_type_max);
2768 }
2769
2770 /**
2771 * ab8500_charger_vbusdetf_handler() - VBUS falling detected
2772 * @irq: interrupt number
2773 * @_di: pointer to the ab8500_charger structure
2774 *
2775 * Returns IRQ status(IRQ_HANDLED)
2776 */
ab8500_charger_vbusdetf_handler(int irq,void * _di)2777 static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di)
2778 {
2779 struct ab8500_charger *di = _di;
2780
2781 di->vbus_detected = false;
2782 dev_dbg(di->dev, "VBUS falling detected\n");
2783 queue_work(di->charger_wq, &di->detect_usb_type_work);
2784
2785 return IRQ_HANDLED;
2786 }
2787
2788 /**
2789 * ab8500_charger_vbusdetr_handler() - VBUS rising detected
2790 * @irq: interrupt number
2791 * @_di: pointer to the ab8500_charger structure
2792 *
2793 * Returns IRQ status(IRQ_HANDLED)
2794 */
ab8500_charger_vbusdetr_handler(int irq,void * _di)2795 static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di)
2796 {
2797 struct ab8500_charger *di = _di;
2798
2799 di->vbus_detected = true;
2800 dev_dbg(di->dev, "VBUS rising detected\n");
2801
2802 queue_work(di->charger_wq, &di->detect_usb_type_work);
2803
2804 return IRQ_HANDLED;
2805 }
2806
2807 /**
2808 * ab8500_charger_usblinkstatus_handler() - USB link status has changed
2809 * @irq: interrupt number
2810 * @_di: pointer to the ab8500_charger structure
2811 *
2812 * Returns IRQ status(IRQ_HANDLED)
2813 */
ab8500_charger_usblinkstatus_handler(int irq,void * _di)2814 static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di)
2815 {
2816 struct ab8500_charger *di = _di;
2817
2818 dev_dbg(di->dev, "USB link status changed\n");
2819
2820 queue_work(di->charger_wq, &di->usb_link_status_work);
2821
2822 return IRQ_HANDLED;
2823 }
2824
2825 /**
2826 * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger
2827 * thermal protection threshold
2828 * @irq: interrupt number
2829 * @_di: pointer to the ab8500_charger structure
2830 *
2831 * Returns IRQ status(IRQ_HANDLED)
2832 */
ab8500_charger_usbchthprotr_handler(int irq,void * _di)2833 static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di)
2834 {
2835 struct ab8500_charger *di = _di;
2836
2837 dev_dbg(di->dev,
2838 "Die temp above USB charger thermal protection threshold\n");
2839 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2840
2841 return IRQ_HANDLED;
2842 }
2843
2844 /**
2845 * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger
2846 * thermal protection threshold
2847 * @irq: interrupt number
2848 * @_di: pointer to the ab8500_charger structure
2849 *
2850 * Returns IRQ status(IRQ_HANDLED)
2851 */
ab8500_charger_usbchthprotf_handler(int irq,void * _di)2852 static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di)
2853 {
2854 struct ab8500_charger *di = _di;
2855
2856 dev_dbg(di->dev,
2857 "Die temp ok for USB charger thermal protection threshold\n");
2858 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2859
2860 return IRQ_HANDLED;
2861 }
2862
2863 /**
2864 * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected
2865 * @irq: interrupt number
2866 * @_di: pointer to the ab8500_charger structure
2867 *
2868 * Returns IRQ status(IRQ_HANDLED)
2869 */
ab8500_charger_usbchargernotokr_handler(int irq,void * _di)2870 static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di)
2871 {
2872 struct ab8500_charger *di = _di;
2873
2874 dev_dbg(di->dev, "Not allowed USB charger detected\n");
2875 queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0);
2876
2877 return IRQ_HANDLED;
2878 }
2879
2880 /**
2881 * ab8500_charger_chwdexp_handler() - Charger watchdog expired
2882 * @irq: interrupt number
2883 * @_di: pointer to the ab8500_charger structure
2884 *
2885 * Returns IRQ status(IRQ_HANDLED)
2886 */
ab8500_charger_chwdexp_handler(int irq,void * _di)2887 static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di)
2888 {
2889 struct ab8500_charger *di = _di;
2890
2891 dev_dbg(di->dev, "Charger watchdog expired\n");
2892
2893 /*
2894 * The charger that was online when the watchdog expired
2895 * needs to be restarted for charging to start again
2896 */
2897 if (di->ac.charger_online) {
2898 di->ac.wd_expired = true;
2899 ab8500_power_supply_changed(di, di->ac_chg.psy);
2900 }
2901 if (di->usb.charger_online) {
2902 di->usb.wd_expired = true;
2903 ab8500_power_supply_changed(di, di->usb_chg.psy);
2904 }
2905
2906 return IRQ_HANDLED;
2907 }
2908
2909 /**
2910 * ab8500_charger_vbuschdropend_handler() - VBUS drop removed
2911 * @irq: interrupt number
2912 * @_di: pointer to the ab8500_charger structure
2913 *
2914 * Returns IRQ status(IRQ_HANDLED)
2915 */
ab8500_charger_vbuschdropend_handler(int irq,void * _di)2916 static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di)
2917 {
2918 struct ab8500_charger *di = _di;
2919
2920 dev_dbg(di->dev, "VBUS charger drop ended\n");
2921 di->flags.vbus_drop_end = true;
2922
2923 /*
2924 * VBUS might have dropped due to bad connection.
2925 * Schedule a new input limit set to the value SW requests.
2926 */
2927 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work,
2928 round_jiffies(VBUS_IN_CURR_LIM_RETRY_SET_TIME * HZ));
2929
2930 return IRQ_HANDLED;
2931 }
2932
2933 /**
2934 * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected
2935 * @irq: interrupt number
2936 * @_di: pointer to the ab8500_charger structure
2937 *
2938 * Returns IRQ status(IRQ_HANDLED)
2939 */
ab8500_charger_vbusovv_handler(int irq,void * _di)2940 static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di)
2941 {
2942 struct ab8500_charger *di = _di;
2943
2944 dev_dbg(di->dev, "VBUS overvoltage detected\n");
2945 di->flags.vbus_ovv = true;
2946 ab8500_power_supply_changed(di, di->usb_chg.psy);
2947
2948 /* Schedule a new HW failure check */
2949 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2950
2951 return IRQ_HANDLED;
2952 }
2953
2954 /**
2955 * ab8500_charger_ac_get_property() - get the ac/mains properties
2956 * @psy: pointer to the power_supply structure
2957 * @psp: pointer to the power_supply_property structure
2958 * @val: pointer to the power_supply_propval union
2959 *
2960 * This function gets called when an application tries to get the ac/mains
2961 * properties by reading the sysfs files.
2962 * AC/Mains properties are online, present and voltage.
2963 * online: ac/mains charging is in progress or not
2964 * present: presence of the ac/mains
2965 * voltage: AC/Mains voltage
2966 * Returns error code in case of failure else 0(on success)
2967 */
ab8500_charger_ac_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)2968 static int ab8500_charger_ac_get_property(struct power_supply *psy,
2969 enum power_supply_property psp,
2970 union power_supply_propval *val)
2971 {
2972 struct ab8500_charger *di;
2973 int ret;
2974
2975 di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy));
2976
2977 switch (psp) {
2978 case POWER_SUPPLY_PROP_HEALTH:
2979 if (di->flags.mainextchnotok)
2980 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2981 else if (di->ac.wd_expired || di->usb.wd_expired)
2982 val->intval = POWER_SUPPLY_HEALTH_DEAD;
2983 else if (di->flags.main_thermal_prot)
2984 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2985 else
2986 val->intval = POWER_SUPPLY_HEALTH_GOOD;
2987 break;
2988 case POWER_SUPPLY_PROP_ONLINE:
2989 val->intval = di->ac.charger_online;
2990 break;
2991 case POWER_SUPPLY_PROP_PRESENT:
2992 val->intval = di->ac.charger_connected;
2993 break;
2994 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2995 ret = ab8500_charger_get_ac_voltage(di);
2996 if (ret >= 0)
2997 di->ac.charger_voltage = ret;
2998 /* On error, use previous value */
2999 val->intval = di->ac.charger_voltage * 1000;
3000 break;
3001 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
3002 /*
3003 * This property is used to indicate when CV mode is entered
3004 * for the AC charger
3005 */
3006 di->ac.cv_active = ab8500_charger_ac_cv(di);
3007 val->intval = di->ac.cv_active;
3008 break;
3009 case POWER_SUPPLY_PROP_CURRENT_NOW:
3010 ret = ab8500_charger_get_ac_current(di);
3011 if (ret >= 0)
3012 di->ac.charger_current = ret;
3013 val->intval = di->ac.charger_current * 1000;
3014 break;
3015 default:
3016 return -EINVAL;
3017 }
3018 return 0;
3019 }
3020
3021 /**
3022 * ab8500_charger_usb_get_property() - get the usb properties
3023 * @psy: pointer to the power_supply structure
3024 * @psp: pointer to the power_supply_property structure
3025 * @val: pointer to the power_supply_propval union
3026 *
3027 * This function gets called when an application tries to get the usb
3028 * properties by reading the sysfs files.
3029 * USB properties are online, present and voltage.
3030 * online: usb charging is in progress or not
3031 * present: presence of the usb
3032 * voltage: vbus voltage
3033 * Returns error code in case of failure else 0(on success)
3034 */
ab8500_charger_usb_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)3035 static int ab8500_charger_usb_get_property(struct power_supply *psy,
3036 enum power_supply_property psp,
3037 union power_supply_propval *val)
3038 {
3039 struct ab8500_charger *di;
3040 int ret;
3041
3042 di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy));
3043
3044 switch (psp) {
3045 case POWER_SUPPLY_PROP_HEALTH:
3046 if (di->flags.usbchargernotok)
3047 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
3048 else if (di->ac.wd_expired || di->usb.wd_expired)
3049 val->intval = POWER_SUPPLY_HEALTH_DEAD;
3050 else if (di->flags.usb_thermal_prot)
3051 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
3052 else if (di->flags.vbus_ovv)
3053 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
3054 else
3055 val->intval = POWER_SUPPLY_HEALTH_GOOD;
3056 break;
3057 case POWER_SUPPLY_PROP_ONLINE:
3058 val->intval = di->usb.charger_online;
3059 break;
3060 case POWER_SUPPLY_PROP_PRESENT:
3061 val->intval = di->usb.charger_connected;
3062 break;
3063 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
3064 ret = ab8500_charger_get_vbus_voltage(di);
3065 if (ret >= 0)
3066 di->usb.charger_voltage = ret;
3067 val->intval = di->usb.charger_voltage * 1000;
3068 break;
3069 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
3070 /*
3071 * This property is used to indicate when CV mode is entered
3072 * for the USB charger
3073 */
3074 di->usb.cv_active = ab8500_charger_usb_cv(di);
3075 val->intval = di->usb.cv_active;
3076 break;
3077 case POWER_SUPPLY_PROP_CURRENT_NOW:
3078 ret = ab8500_charger_get_usb_current(di);
3079 if (ret >= 0)
3080 di->usb.charger_current = ret;
3081 val->intval = di->usb.charger_current * 1000;
3082 break;
3083 case POWER_SUPPLY_PROP_CURRENT_AVG:
3084 /*
3085 * This property is used to indicate when VBUS has collapsed
3086 * due to too high output current from the USB charger
3087 */
3088 if (di->flags.vbus_collapse)
3089 val->intval = 1;
3090 else
3091 val->intval = 0;
3092 break;
3093 default:
3094 return -EINVAL;
3095 }
3096 return 0;
3097 }
3098
3099 /**
3100 * ab8500_charger_init_hw_registers() - Set up charger related registers
3101 * @di: pointer to the ab8500_charger structure
3102 *
3103 * Set up charger OVV, watchdog and maximum voltage registers as well as
3104 * charging of the backup battery
3105 */
ab8500_charger_init_hw_registers(struct ab8500_charger * di)3106 static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
3107 {
3108 int ret = 0;
3109 u8 bup_vch_range = 0, vbup33_vrtcn = 0;
3110
3111 /* Setup maximum charger current and voltage for ABB cut2.0 */
3112 if (!is_ab8500_1p1_or_earlier(di->parent)) {
3113 ret = abx500_set_register_interruptible(di->dev,
3114 AB8500_CHARGER,
3115 AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6);
3116 if (ret) {
3117 dev_err(di->dev,
3118 "failed to set CH_VOLT_LVL_MAX_REG\n");
3119 goto out;
3120 }
3121
3122 if (is_ab8540(di->parent))
3123 ret = abx500_set_register_interruptible(di->dev,
3124 AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
3125 CH_OP_CUR_LVL_2P);
3126 else
3127 ret = abx500_set_register_interruptible(di->dev,
3128 AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
3129 CH_OP_CUR_LVL_1P6);
3130 if (ret) {
3131 dev_err(di->dev,
3132 "failed to set CH_OPT_CRNTLVL_MAX_REG\n");
3133 goto out;
3134 }
3135 }
3136
3137 if (is_ab9540_2p0(di->parent) || is_ab9540_3p0(di->parent)
3138 || is_ab8505_2p0(di->parent) || is_ab8540(di->parent))
3139 ret = abx500_mask_and_set_register_interruptible(di->dev,
3140 AB8500_CHARGER,
3141 AB8500_USBCH_CTRL2_REG,
3142 VBUS_AUTO_IN_CURR_LIM_ENA,
3143 VBUS_AUTO_IN_CURR_LIM_ENA);
3144 else
3145 /*
3146 * VBUS OVV set to 6.3V and enable automatic current limitation
3147 */
3148 ret = abx500_set_register_interruptible(di->dev,
3149 AB8500_CHARGER,
3150 AB8500_USBCH_CTRL2_REG,
3151 VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA);
3152 if (ret) {
3153 dev_err(di->dev,
3154 "failed to set automatic current limitation\n");
3155 goto out;
3156 }
3157
3158 /* Enable main watchdog in OTP */
3159 ret = abx500_set_register_interruptible(di->dev,
3160 AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD);
3161 if (ret) {
3162 dev_err(di->dev, "failed to enable main WD in OTP\n");
3163 goto out;
3164 }
3165
3166 /* Enable main watchdog */
3167 ret = abx500_set_register_interruptible(di->dev,
3168 AB8500_SYS_CTRL2_BLOCK,
3169 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA);
3170 if (ret) {
3171 dev_err(di->dev, "faile to enable main watchdog\n");
3172 goto out;
3173 }
3174
3175 /*
3176 * Due to internal synchronisation, Enable and Kick watchdog bits
3177 * cannot be enabled in a single write.
3178 * A minimum delay of 2*32 kHz period (62.5µs) must be inserted
3179 * between writing Enable then Kick bits.
3180 */
3181 udelay(63);
3182
3183 /* Kick main watchdog */
3184 ret = abx500_set_register_interruptible(di->dev,
3185 AB8500_SYS_CTRL2_BLOCK,
3186 AB8500_MAIN_WDOG_CTRL_REG,
3187 (MAIN_WDOG_ENA | MAIN_WDOG_KICK));
3188 if (ret) {
3189 dev_err(di->dev, "failed to kick main watchdog\n");
3190 goto out;
3191 }
3192
3193 /* Disable main watchdog */
3194 ret = abx500_set_register_interruptible(di->dev,
3195 AB8500_SYS_CTRL2_BLOCK,
3196 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS);
3197 if (ret) {
3198 dev_err(di->dev, "failed to disable main watchdog\n");
3199 goto out;
3200 }
3201
3202 /* Set watchdog timeout */
3203 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3204 AB8500_CH_WD_TIMER_REG, WD_TIMER);
3205 if (ret) {
3206 dev_err(di->dev, "failed to set charger watchdog timeout\n");
3207 goto out;
3208 }
3209
3210 ret = ab8500_charger_led_en(di, false);
3211 if (ret < 0) {
3212 dev_err(di->dev, "failed to disable LED\n");
3213 goto out;
3214 }
3215
3216 /* Backup battery voltage and current */
3217 if (di->bm->bkup_bat_v > BUP_VCH_SEL_3P1V)
3218 bup_vch_range = BUP_VCH_RANGE;
3219 if (di->bm->bkup_bat_v == BUP_VCH_SEL_3P3V)
3220 vbup33_vrtcn = VBUP33_VRTCN;
3221
3222 ret = abx500_set_register_interruptible(di->dev,
3223 AB8500_RTC,
3224 AB8500_RTC_BACKUP_CHG_REG,
3225 (di->bm->bkup_bat_v & 0x3) | di->bm->bkup_bat_i);
3226 if (ret) {
3227 dev_err(di->dev, "failed to setup backup battery charging\n");
3228 goto out;
3229 }
3230 if (is_ab8540(di->parent)) {
3231 ret = abx500_set_register_interruptible(di->dev,
3232 AB8500_RTC,
3233 AB8500_RTC_CTRL1_REG,
3234 bup_vch_range | vbup33_vrtcn);
3235 if (ret) {
3236 dev_err(di->dev,
3237 "failed to setup backup battery charging\n");
3238 goto out;
3239 }
3240 }
3241
3242 /* Enable backup battery charging */
3243 abx500_mask_and_set_register_interruptible(di->dev,
3244 AB8500_RTC, AB8500_RTC_CTRL_REG,
3245 RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
3246 if (ret < 0)
3247 dev_err(di->dev, "%s mask and set failed\n", __func__);
3248
3249 if (is_ab8540(di->parent)) {
3250 ret = abx500_mask_and_set_register_interruptible(di->dev,
3251 AB8500_CHARGER, AB8540_USB_PP_MODE_REG,
3252 BUS_VSYS_VOL_SELECT_MASK, BUS_VSYS_VOL_SELECT_3P6V);
3253 if (ret) {
3254 dev_err(di->dev,
3255 "failed to setup usb power path vsys voltage\n");
3256 goto out;
3257 }
3258 ret = abx500_mask_and_set_register_interruptible(di->dev,
3259 AB8500_CHARGER, AB8540_USB_PP_CHR_REG,
3260 BUS_PP_PRECHG_CURRENT_MASK, 0);
3261 if (ret) {
3262 dev_err(di->dev,
3263 "failed to setup usb power path prechage current\n");
3264 goto out;
3265 }
3266 }
3267
3268 out:
3269 return ret;
3270 }
3271
3272 /*
3273 * ab8500 charger driver interrupts and their respective isr
3274 */
3275 static struct ab8500_charger_interrupts ab8500_charger_irq[] = {
3276 {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler},
3277 {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler},
3278 {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler},
3279 {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler},
3280 {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler},
3281 {"VBUS_DET_F", ab8500_charger_vbusdetf_handler},
3282 {"VBUS_DET_R", ab8500_charger_vbusdetr_handler},
3283 {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler},
3284 {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler},
3285 {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler},
3286 {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler},
3287 {"VBUS_OVV", ab8500_charger_vbusovv_handler},
3288 {"CH_WD_EXP", ab8500_charger_chwdexp_handler},
3289 {"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler},
3290 };
3291
ab8500_charger_usb_notifier_call(struct notifier_block * nb,unsigned long event,void * power)3292 static int ab8500_charger_usb_notifier_call(struct notifier_block *nb,
3293 unsigned long event, void *power)
3294 {
3295 struct ab8500_charger *di =
3296 container_of(nb, struct ab8500_charger, nb);
3297 enum ab8500_usb_state bm_usb_state;
3298 unsigned mA = *((unsigned *)power);
3299
3300 if (!di)
3301 return NOTIFY_DONE;
3302
3303 if (event != USB_EVENT_VBUS) {
3304 dev_dbg(di->dev, "not a standard host, returning\n");
3305 return NOTIFY_DONE;
3306 }
3307
3308 /* TODO: State is fabricate here. See if charger really needs USB
3309 * state or if mA is enough
3310 */
3311 if ((di->usb_state.usb_current == 2) && (mA > 2))
3312 bm_usb_state = AB8500_BM_USB_STATE_RESUME;
3313 else if (mA == 0)
3314 bm_usb_state = AB8500_BM_USB_STATE_RESET_HS;
3315 else if (mA == 2)
3316 bm_usb_state = AB8500_BM_USB_STATE_SUSPEND;
3317 else if (mA >= 8) /* 8, 100, 500 */
3318 bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED;
3319 else /* Should never occur */
3320 bm_usb_state = AB8500_BM_USB_STATE_RESET_FS;
3321
3322 dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n",
3323 __func__, bm_usb_state, mA);
3324
3325 spin_lock(&di->usb_state.usb_lock);
3326 di->usb_state.state_tmp = bm_usb_state;
3327 di->usb_state.usb_current_tmp = mA;
3328 spin_unlock(&di->usb_state.usb_lock);
3329
3330 /*
3331 * wait for some time until you get updates from the usb stack
3332 * and negotiations are completed
3333 */
3334 queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2);
3335
3336 return NOTIFY_OK;
3337 }
3338
3339 #if defined(CONFIG_PM)
ab8500_charger_resume(struct platform_device * pdev)3340 static int ab8500_charger_resume(struct platform_device *pdev)
3341 {
3342 int ret;
3343 struct ab8500_charger *di = platform_get_drvdata(pdev);
3344
3345 /*
3346 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3347 * logic. That means we have to continously kick the charger
3348 * watchdog even when no charger is connected. This is only
3349 * valid once the AC charger has been enabled. This is
3350 * a bug that is not handled by the algorithm and the
3351 * watchdog have to be kicked by the charger driver
3352 * when the AC charger is disabled
3353 */
3354 if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) {
3355 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3356 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
3357 if (ret)
3358 dev_err(di->dev, "Failed to kick WD!\n");
3359
3360 /* If not already pending start a new timer */
3361 queue_delayed_work(di->charger_wq, &di->kick_wd_work,
3362 round_jiffies(WD_KICK_INTERVAL));
3363 }
3364
3365 /* If we still have a HW failure, schedule a new check */
3366 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
3367 queue_delayed_work(di->charger_wq,
3368 &di->check_hw_failure_work, 0);
3369 }
3370
3371 if (di->flags.vbus_drop_end)
3372 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0);
3373
3374 return 0;
3375 }
3376
ab8500_charger_suspend(struct platform_device * pdev,pm_message_t state)3377 static int ab8500_charger_suspend(struct platform_device *pdev,
3378 pm_message_t state)
3379 {
3380 struct ab8500_charger *di = platform_get_drvdata(pdev);
3381
3382 /* Cancel any pending jobs */
3383 cancel_delayed_work(&di->check_hw_failure_work);
3384 cancel_delayed_work(&di->vbus_drop_end_work);
3385
3386 flush_delayed_work(&di->attach_work);
3387 flush_delayed_work(&di->usb_charger_attached_work);
3388 flush_delayed_work(&di->ac_charger_attached_work);
3389 flush_delayed_work(&di->check_usbchgnotok_work);
3390 flush_delayed_work(&di->check_vbat_work);
3391 flush_delayed_work(&di->kick_wd_work);
3392
3393 flush_work(&di->usb_link_status_work);
3394 flush_work(&di->ac_work);
3395 flush_work(&di->detect_usb_type_work);
3396
3397 if (atomic_read(&di->current_stepping_sessions))
3398 return -EAGAIN;
3399
3400 return 0;
3401 }
3402 #else
3403 #define ab8500_charger_suspend NULL
3404 #define ab8500_charger_resume NULL
3405 #endif
3406
3407 static struct notifier_block charger_nb = {
3408 .notifier_call = ab8500_external_charger_prepare,
3409 };
3410
ab8500_charger_remove(struct platform_device * pdev)3411 static int ab8500_charger_remove(struct platform_device *pdev)
3412 {
3413 struct ab8500_charger *di = platform_get_drvdata(pdev);
3414 int i, irq, ret;
3415
3416 /* Disable AC charging */
3417 ab8500_charger_ac_en(&di->ac_chg, false, 0, 0);
3418
3419 /* Disable USB charging */
3420 ab8500_charger_usb_en(&di->usb_chg, false, 0, 0);
3421
3422 /* Disable interrupts */
3423 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
3424 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3425 free_irq(irq, di);
3426 }
3427
3428 /* Backup battery voltage and current disable */
3429 ret = abx500_mask_and_set_register_interruptible(di->dev,
3430 AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0);
3431 if (ret < 0)
3432 dev_err(di->dev, "%s mask and set failed\n", __func__);
3433
3434 usb_unregister_notifier(di->usb_phy, &di->nb);
3435 usb_put_phy(di->usb_phy);
3436
3437 /* Delete the work queue */
3438 destroy_workqueue(di->charger_wq);
3439
3440 /* Unregister external charger enable notifier */
3441 if (!di->ac_chg.enabled)
3442 blocking_notifier_chain_unregister(
3443 &charger_notifier_list, &charger_nb);
3444
3445 flush_scheduled_work();
3446 if (di->usb_chg.enabled)
3447 power_supply_unregister(di->usb_chg.psy);
3448
3449 if (di->ac_chg.enabled && !di->ac_chg.external)
3450 power_supply_unregister(di->ac_chg.psy);
3451
3452 return 0;
3453 }
3454
3455 static char *supply_interface[] = {
3456 "ab8500_chargalg",
3457 "ab8500_fg",
3458 "ab8500_btemp",
3459 };
3460
3461 static const struct power_supply_desc ab8500_ac_chg_desc = {
3462 .name = "ab8500_ac",
3463 .type = POWER_SUPPLY_TYPE_MAINS,
3464 .properties = ab8500_charger_ac_props,
3465 .num_properties = ARRAY_SIZE(ab8500_charger_ac_props),
3466 .get_property = ab8500_charger_ac_get_property,
3467 };
3468
3469 static const struct power_supply_desc ab8500_usb_chg_desc = {
3470 .name = "ab8500_usb",
3471 .type = POWER_SUPPLY_TYPE_USB,
3472 .properties = ab8500_charger_usb_props,
3473 .num_properties = ARRAY_SIZE(ab8500_charger_usb_props),
3474 .get_property = ab8500_charger_usb_get_property,
3475 };
3476
ab8500_charger_probe(struct platform_device * pdev)3477 static int ab8500_charger_probe(struct platform_device *pdev)
3478 {
3479 struct device_node *np = pdev->dev.of_node;
3480 struct abx500_bm_data *plat = pdev->dev.platform_data;
3481 struct power_supply_config ac_psy_cfg = {}, usb_psy_cfg = {};
3482 struct ab8500_charger *di;
3483 int irq, i, charger_status, ret = 0, ch_stat;
3484
3485 di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
3486 if (!di) {
3487 dev_err(&pdev->dev, "%s no mem for ab8500_charger\n", __func__);
3488 return -ENOMEM;
3489 }
3490
3491 if (!plat) {
3492 dev_err(&pdev->dev, "no battery management data supplied\n");
3493 return -EINVAL;
3494 }
3495 di->bm = plat;
3496
3497 if (np) {
3498 ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm);
3499 if (ret) {
3500 dev_err(&pdev->dev, "failed to get battery information\n");
3501 return ret;
3502 }
3503 di->autopower_cfg = of_property_read_bool(np, "autopower_cfg");
3504 } else
3505 di->autopower_cfg = false;
3506
3507 /* get parent data */
3508 di->dev = &pdev->dev;
3509 di->parent = dev_get_drvdata(pdev->dev.parent);
3510 di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
3511
3512 /* initialize lock */
3513 spin_lock_init(&di->usb_state.usb_lock);
3514 mutex_init(&di->usb_ipt_crnt_lock);
3515
3516 di->autopower = false;
3517 di->invalid_charger_detect_state = 0;
3518
3519 /* AC and USB supply config */
3520 ac_psy_cfg.supplied_to = supply_interface;
3521 ac_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
3522 ac_psy_cfg.drv_data = &di->ac_chg;
3523 usb_psy_cfg.supplied_to = supply_interface;
3524 usb_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
3525 usb_psy_cfg.drv_data = &di->usb_chg;
3526
3527 /* AC supply */
3528 /* ux500_charger sub-class */
3529 di->ac_chg.ops.enable = &ab8500_charger_ac_en;
3530 di->ac_chg.ops.check_enable = &ab8500_charger_ac_check_enable;
3531 di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3532 di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3533 di->ac_chg.max_out_volt = ab8500_charger_voltage_map[
3534 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3535 di->ac_chg.max_out_curr =
3536 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3537 di->ac_chg.wdt_refresh = CHG_WD_INTERVAL;
3538 di->ac_chg.enabled = di->bm->ac_enabled;
3539 di->ac_chg.external = false;
3540
3541 /*notifier for external charger enabling*/
3542 if (!di->ac_chg.enabled)
3543 blocking_notifier_chain_register(
3544 &charger_notifier_list, &charger_nb);
3545
3546 /* USB supply */
3547 /* ux500_charger sub-class */
3548 di->usb_chg.ops.enable = &ab8500_charger_usb_en;
3549 di->usb_chg.ops.check_enable = &ab8500_charger_usb_check_enable;
3550 di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3551 di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3552 di->usb_chg.ops.pp_enable = &ab8540_charger_power_path_enable;
3553 di->usb_chg.ops.pre_chg_enable = &ab8540_charger_usb_pre_chg_enable;
3554 di->usb_chg.max_out_volt = ab8500_charger_voltage_map[
3555 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3556 di->usb_chg.max_out_curr =
3557 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3558 di->usb_chg.wdt_refresh = CHG_WD_INTERVAL;
3559 di->usb_chg.enabled = di->bm->usb_enabled;
3560 di->usb_chg.external = false;
3561 di->usb_chg.power_path = di->bm->usb_power_path;
3562 di->usb_state.usb_current = -1;
3563
3564 /* Create a work queue for the charger */
3565 di->charger_wq =
3566 create_singlethread_workqueue("ab8500_charger_wq");
3567 if (di->charger_wq == NULL) {
3568 dev_err(di->dev, "failed to create work queue\n");
3569 return -ENOMEM;
3570 }
3571
3572 mutex_init(&di->charger_attached_mutex);
3573
3574 /* Init work for HW failure check */
3575 INIT_DEFERRABLE_WORK(&di->check_hw_failure_work,
3576 ab8500_charger_check_hw_failure_work);
3577 INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work,
3578 ab8500_charger_check_usbchargernotok_work);
3579
3580 INIT_DELAYED_WORK(&di->ac_charger_attached_work,
3581 ab8500_charger_ac_attached_work);
3582 INIT_DELAYED_WORK(&di->usb_charger_attached_work,
3583 ab8500_charger_usb_attached_work);
3584
3585 /*
3586 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3587 * logic. That means we have to continously kick the charger
3588 * watchdog even when no charger is connected. This is only
3589 * valid once the AC charger has been enabled. This is
3590 * a bug that is not handled by the algorithm and the
3591 * watchdog have to be kicked by the charger driver
3592 * when the AC charger is disabled
3593 */
3594 INIT_DEFERRABLE_WORK(&di->kick_wd_work,
3595 ab8500_charger_kick_watchdog_work);
3596
3597 INIT_DEFERRABLE_WORK(&di->check_vbat_work,
3598 ab8500_charger_check_vbat_work);
3599
3600 INIT_DELAYED_WORK(&di->attach_work,
3601 ab8500_charger_usb_link_attach_work);
3602
3603 INIT_DELAYED_WORK(&di->usb_state_changed_work,
3604 ab8500_charger_usb_state_changed_work);
3605
3606 INIT_DELAYED_WORK(&di->vbus_drop_end_work,
3607 ab8500_charger_vbus_drop_end_work);
3608
3609 /* Init work for charger detection */
3610 INIT_WORK(&di->usb_link_status_work,
3611 ab8500_charger_usb_link_status_work);
3612 INIT_WORK(&di->ac_work, ab8500_charger_ac_work);
3613 INIT_WORK(&di->detect_usb_type_work,
3614 ab8500_charger_detect_usb_type_work);
3615
3616 /* Init work for checking HW status */
3617 INIT_WORK(&di->check_main_thermal_prot_work,
3618 ab8500_charger_check_main_thermal_prot_work);
3619 INIT_WORK(&di->check_usb_thermal_prot_work,
3620 ab8500_charger_check_usb_thermal_prot_work);
3621
3622 /*
3623 * VDD ADC supply needs to be enabled from this driver when there
3624 * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
3625 * interrupts during charging
3626 */
3627 di->regu = devm_regulator_get(di->dev, "vddadc");
3628 if (IS_ERR(di->regu)) {
3629 ret = PTR_ERR(di->regu);
3630 dev_err(di->dev, "failed to get vddadc regulator\n");
3631 goto free_charger_wq;
3632 }
3633
3634
3635 /* Initialize OVV, and other registers */
3636 ret = ab8500_charger_init_hw_registers(di);
3637 if (ret) {
3638 dev_err(di->dev, "failed to initialize ABB registers\n");
3639 goto free_charger_wq;
3640 }
3641
3642 /* Register AC charger class */
3643 if (di->ac_chg.enabled) {
3644 di->ac_chg.psy = power_supply_register(di->dev,
3645 &ab8500_ac_chg_desc,
3646 &ac_psy_cfg);
3647 if (IS_ERR(di->ac_chg.psy)) {
3648 dev_err(di->dev, "failed to register AC charger\n");
3649 ret = PTR_ERR(di->ac_chg.psy);
3650 goto free_charger_wq;
3651 }
3652 }
3653
3654 /* Register USB charger class */
3655 if (di->usb_chg.enabled) {
3656 di->usb_chg.psy = power_supply_register(di->dev,
3657 &ab8500_usb_chg_desc,
3658 &usb_psy_cfg);
3659 if (IS_ERR(di->usb_chg.psy)) {
3660 dev_err(di->dev, "failed to register USB charger\n");
3661 ret = PTR_ERR(di->usb_chg.psy);
3662 goto free_ac;
3663 }
3664 }
3665
3666 di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
3667 if (IS_ERR_OR_NULL(di->usb_phy)) {
3668 dev_err(di->dev, "failed to get usb transceiver\n");
3669 ret = -EINVAL;
3670 goto free_usb;
3671 }
3672 di->nb.notifier_call = ab8500_charger_usb_notifier_call;
3673 ret = usb_register_notifier(di->usb_phy, &di->nb);
3674 if (ret) {
3675 dev_err(di->dev, "failed to register usb notifier\n");
3676 goto put_usb_phy;
3677 }
3678
3679 /* Identify the connected charger types during startup */
3680 charger_status = ab8500_charger_detect_chargers(di, true);
3681 if (charger_status & AC_PW_CONN) {
3682 di->ac.charger_connected = 1;
3683 di->ac_conn = true;
3684 ab8500_power_supply_changed(di, di->ac_chg.psy);
3685 sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
3686 }
3687
3688 if (charger_status & USB_PW_CONN) {
3689 di->vbus_detected = true;
3690 di->vbus_detected_start = true;
3691 queue_work(di->charger_wq,
3692 &di->detect_usb_type_work);
3693 }
3694
3695 /* Register interrupts */
3696 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
3697 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3698 ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr,
3699 IRQF_SHARED | IRQF_NO_SUSPEND,
3700 ab8500_charger_irq[i].name, di);
3701
3702 if (ret != 0) {
3703 dev_err(di->dev, "failed to request %s IRQ %d: %d\n"
3704 , ab8500_charger_irq[i].name, irq, ret);
3705 goto free_irq;
3706 }
3707 dev_dbg(di->dev, "Requested %s IRQ %d: %d\n",
3708 ab8500_charger_irq[i].name, irq, ret);
3709 }
3710
3711 platform_set_drvdata(pdev, di);
3712
3713 mutex_lock(&di->charger_attached_mutex);
3714
3715 ch_stat = ab8500_charger_detect_chargers(di, false);
3716
3717 if ((ch_stat & AC_PW_CONN) == AC_PW_CONN) {
3718 if (is_ab8500(di->parent))
3719 queue_delayed_work(di->charger_wq,
3720 &di->ac_charger_attached_work,
3721 HZ);
3722 }
3723 if ((ch_stat & USB_PW_CONN) == USB_PW_CONN) {
3724 if (is_ab8500(di->parent))
3725 queue_delayed_work(di->charger_wq,
3726 &di->usb_charger_attached_work,
3727 HZ);
3728 }
3729
3730 mutex_unlock(&di->charger_attached_mutex);
3731
3732 return ret;
3733
3734 free_irq:
3735 usb_unregister_notifier(di->usb_phy, &di->nb);
3736
3737 /* We also have to free all successfully registered irqs */
3738 for (i = i - 1; i >= 0; i--) {
3739 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3740 free_irq(irq, di);
3741 }
3742 put_usb_phy:
3743 usb_put_phy(di->usb_phy);
3744 free_usb:
3745 if (di->usb_chg.enabled)
3746 power_supply_unregister(di->usb_chg.psy);
3747 free_ac:
3748 if (di->ac_chg.enabled)
3749 power_supply_unregister(di->ac_chg.psy);
3750 free_charger_wq:
3751 destroy_workqueue(di->charger_wq);
3752 return ret;
3753 }
3754
3755 static const struct of_device_id ab8500_charger_match[] = {
3756 { .compatible = "stericsson,ab8500-charger", },
3757 { },
3758 };
3759 MODULE_DEVICE_TABLE(of, ab8500_charger_match);
3760
3761 static struct platform_driver ab8500_charger_driver = {
3762 .probe = ab8500_charger_probe,
3763 .remove = ab8500_charger_remove,
3764 .suspend = ab8500_charger_suspend,
3765 .resume = ab8500_charger_resume,
3766 .driver = {
3767 .name = "ab8500-charger",
3768 .of_match_table = ab8500_charger_match,
3769 },
3770 };
3771
ab8500_charger_init(void)3772 static int __init ab8500_charger_init(void)
3773 {
3774 return platform_driver_register(&ab8500_charger_driver);
3775 }
3776
ab8500_charger_exit(void)3777 static void __exit ab8500_charger_exit(void)
3778 {
3779 platform_driver_unregister(&ab8500_charger_driver);
3780 }
3781
3782 subsys_initcall_sync(ab8500_charger_init);
3783 module_exit(ab8500_charger_exit);
3784
3785 MODULE_LICENSE("GPL v2");
3786 MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
3787 MODULE_ALIAS("platform:ab8500-charger");
3788 MODULE_DESCRIPTION("AB8500 charger management driver");
3789