1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) ST-Ericsson SA 2012
5 * Charger driver for AB8500
8 * Johan Palsson <johan.palsson@stericsson.com>
9 * Karl Komierowski <karl.komierowski@stericsson.com>
10 * Arun R Murthy <arun.murthy@stericsson.com>
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/device.h>
16 #include <linux/component.h>
17 #include <linux/interrupt.h>
18 #include <linux/delay.h>
19 #include <linux/notifier.h>
20 #include <linux/slab.h>
21 #include <linux/platform_device.h>
22 #include <linux/power_supply.h>
23 #include <linux/completion.h>
24 #include <linux/regulator/consumer.h>
25 #include <linux/err.h>
26 #include <linux/workqueue.h>
27 #include <linux/kobject.h>
29 #include <linux/mfd/core.h>
30 #include <linux/mfd/abx500/ab8500.h>
31 #include <linux/mfd/abx500.h>
32 #include <linux/usb/otg.h>
33 #include <linux/mutex.h>
34 #include <linux/iio/consumer.h>
36 #include "ab8500-bm.h"
37 #include "ab8500-chargalg.h"
39 /* Charger constants */
44 #define MAIN_WDOG_ENA 0x01
45 #define MAIN_WDOG_KICK 0x02
46 #define MAIN_WDOG_DIS 0x00
47 #define CHARG_WD_KICK 0x01
48 #define MAIN_CH_ENA 0x01
49 #define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02
50 #define USB_CH_ENA 0x01
51 #define USB_CHG_NO_OVERSHOOT_ENA_N 0x02
52 #define MAIN_CH_DET 0x01
53 #define MAIN_CH_CV_ON 0x04
54 #define USB_CH_CV_ON 0x08
55 #define VBUS_DET_DBNC100 0x02
56 #define VBUS_DET_DBNC1 0x01
57 #define OTP_ENABLE_WD 0x01
58 #define DROP_COUNT_RESET 0x01
59 #define USB_CH_DET 0x01
61 #define MAIN_CH_INPUT_CURR_SHIFT 4
62 #define VBUS_IN_CURR_LIM_SHIFT 4
63 #define AUTO_VBUS_IN_CURR_LIM_SHIFT 4
64 #define VBUS_IN_CURR_LIM_RETRY_SET_TIME 30 /* seconds */
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
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
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
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
90 /* Watchdog timeout constant */
91 #define WD_TIMER 0x30 /* 4min */
92 #define WD_KICK_INTERVAL (60 * HZ)
94 /* Lowest charger voltage is 3.39V -> 0x4E */
95 #define LOW_VOLT_REG 0x4E
97 /* Step up/down delay in us */
98 #define STEP_UDELAY 1000
100 #define CHARGER_STATUS_POLL 10 /* in ms */
102 #define CHG_WD_INTERVAL (60 * HZ)
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
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,
124 USB_STAT_ACA_RID_C_NM,
125 USB_STAT_ACA_RID_C_HS,
126 USB_STAT_ACA_RID_C_HS_CHIRP,
129 USB_STAT_NOT_VALID_LINK,
131 USB_STAT_SUP_NO_IDGND_VBUS,
132 USB_STAT_SUP_IDGND_VBUS,
133 USB_STAT_CHARGER_LINE_1,
136 USB_STAT_ACA_DOCK_CHARGER,
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,
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
166 #define VBAT_TRESH_IP_CUR_RED 3800
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)
174 * struct ab8500_charger_interrupts - ab8500 interupts
175 * @name: name of the interrupt
176 * @isr function pointer to the isr
178 struct ab8500_charger_interrupts {
180 irqreturn_t (*isr)(int irq, void *data);
183 struct ab8500_charger_info {
184 int charger_connected;
192 struct ab8500_charger_event_flags {
194 bool main_thermal_prot;
195 bool usb_thermal_prot;
197 bool usbchargernotok;
203 struct ab8500_charger_usb_state {
206 enum ab8500_usb_state state;
207 enum ab8500_usb_state state_tmp;
211 struct ab8500_charger_max_usb_in_curr {
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
226 * @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB
228 * @vbat Battery voltage
229 * @old_vbat Previously measured battery voltage
230 * @usb_device_is_unrecognised USB device is unrecognised by the hardware
231 * @autopower Indicate if we should have automatic pwron after pwrloss
232 * @autopower_cfg platform specific power config support for "pwron after pwrloss"
233 * @invalid_charger_detect_state State when forcing AB to use invalid charger
234 * @is_aca_rid: Incicate if accessory is ACA type
235 * @current_stepping_sessions:
236 * Counter for current stepping sessions
237 * @parent: Pointer to the struct ab8500
238 * @adc_main_charger_v ADC channel for main charger voltage
239 * @adc_main_charger_c ADC channel for main charger current
240 * @adc_vbus_v ADC channel for USB charger voltage
241 * @adc_usb_charger_c ADC channel for USB charger current
242 * @bm: Platform specific battery management information
243 * @flags: Structure for information about events triggered
244 * @usb_state: Structure for usb stack information
245 * @max_usb_in_curr: Max USB charger input current
246 * @ac_chg: AC charger power supply
247 * @usb_chg: USB charger power supply
248 * @ac: Structure that holds the AC charger properties
249 * @usb: Structure that holds the USB charger properties
250 * @regu: Pointer to the struct regulator
251 * @charger_wq: Work queue for the IRQs and checking HW state
252 * @usb_ipt_crnt_lock: Lock to protect VBUS input current setting from mutuals
253 * @pm_lock: Lock to prevent system to suspend
254 * @check_vbat_work Work for checking vbat threshold to adjust vbus current
255 * @check_hw_failure_work: Work for checking HW state
256 * @check_usbchgnotok_work: Work for checking USB charger not ok status
257 * @kick_wd_work: Work for kicking the charger watchdog in case
258 * of ABB rev 1.* due to the watchog logic bug
259 * @ac_charger_attached_work: Work for checking if AC charger is still
261 * @usb_charger_attached_work: Work for checking if USB charger is still
263 * @ac_work: Work for checking AC charger connection
264 * @detect_usb_type_work: Work for detecting the USB type connected
265 * @usb_link_status_work: Work for checking the new USB link status
266 * @usb_state_changed_work: Work for checking USB state
267 * @attach_work: Work for detecting USB type
268 * @vbus_drop_end_work: Work for detecting VBUS drop end
269 * @check_main_thermal_prot_work:
270 * Work for checking Main thermal status
271 * @check_usb_thermal_prot_work:
272 * Work for checking USB thermal status
273 * @charger_attached_mutex: For controlling the wakelock
275 struct ab8500_charger {
278 bool vbus_detected_start;
284 bool usb_device_is_unrecognised;
287 int invalid_charger_detect_state;
289 atomic_t current_stepping_sessions;
290 struct ab8500 *parent;
291 struct iio_channel *adc_main_charger_v;
292 struct iio_channel *adc_main_charger_c;
293 struct iio_channel *adc_vbus_v;
294 struct iio_channel *adc_usb_charger_c;
295 struct ab8500_bm_data *bm;
296 struct ab8500_charger_event_flags flags;
297 struct ab8500_charger_usb_state usb_state;
298 struct ab8500_charger_max_usb_in_curr max_usb_in_curr;
299 struct ux500_charger ac_chg;
300 struct ux500_charger usb_chg;
301 struct ab8500_charger_info ac;
302 struct ab8500_charger_info usb;
303 struct regulator *regu;
304 struct workqueue_struct *charger_wq;
305 struct mutex usb_ipt_crnt_lock;
306 struct delayed_work check_vbat_work;
307 struct delayed_work check_hw_failure_work;
308 struct delayed_work check_usbchgnotok_work;
309 struct delayed_work kick_wd_work;
310 struct delayed_work usb_state_changed_work;
311 struct delayed_work attach_work;
312 struct delayed_work ac_charger_attached_work;
313 struct delayed_work usb_charger_attached_work;
314 struct delayed_work vbus_drop_end_work;
315 struct work_struct ac_work;
316 struct work_struct detect_usb_type_work;
317 struct work_struct usb_link_status_work;
318 struct work_struct check_main_thermal_prot_work;
319 struct work_struct check_usb_thermal_prot_work;
320 struct usb_phy *usb_phy;
321 struct notifier_block nb;
322 struct mutex charger_attached_mutex;
326 static enum power_supply_property ab8500_charger_ac_props[] = {
327 POWER_SUPPLY_PROP_HEALTH,
328 POWER_SUPPLY_PROP_PRESENT,
329 POWER_SUPPLY_PROP_ONLINE,
330 POWER_SUPPLY_PROP_VOLTAGE_NOW,
331 POWER_SUPPLY_PROP_VOLTAGE_AVG,
332 POWER_SUPPLY_PROP_CURRENT_NOW,
336 static enum power_supply_property ab8500_charger_usb_props[] = {
337 POWER_SUPPLY_PROP_HEALTH,
338 POWER_SUPPLY_PROP_CURRENT_AVG,
339 POWER_SUPPLY_PROP_PRESENT,
340 POWER_SUPPLY_PROP_ONLINE,
341 POWER_SUPPLY_PROP_VOLTAGE_NOW,
342 POWER_SUPPLY_PROP_VOLTAGE_AVG,
343 POWER_SUPPLY_PROP_CURRENT_NOW,
347 * Function for enabling and disabling sw fallback mode
348 * should always be disabled when no charger is connected.
350 static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di,
359 dev_dbg(di->dev, "SW Fallback: %d\n", fallback);
361 if (is_ab8500(di->parent)) {
366 bank = AB8500_SYS_CTRL1_BLOCK;
367 reg = AB8500_SW_CONTROL_FALLBACK;
371 /* read the register containing fallback bit */
372 ret = abx500_get_register_interruptible(di->dev, bank, reg, &val);
374 dev_err(di->dev, "%d read failed\n", __LINE__);
378 if (is_ab8500(di->parent)) {
379 /* enable the OPT emulation registers */
380 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
382 dev_err(di->dev, "%d write failed\n", __LINE__);
392 /* write back the changed fallback bit value to register */
393 ret = abx500_set_register_interruptible(di->dev, bank, reg, val);
395 dev_err(di->dev, "%d write failed\n", __LINE__);
399 if (is_ab8500(di->parent)) {
400 /* disable the set OTP registers again */
401 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
403 dev_err(di->dev, "%d write failed\n", __LINE__);
409 * ab8500_power_supply_changed - a wrapper with local extensions for
410 * power_supply_changed
411 * @di: pointer to the ab8500_charger structure
412 * @psy: pointer to power_supply_that have changed.
415 static void ab8500_power_supply_changed(struct ab8500_charger *di,
416 struct power_supply *psy)
419 * This happens if we get notifications or interrupts and
420 * the platform has been configured not to support one or
421 * other type of charging.
426 if (di->autopower_cfg) {
427 if (!di->usb.charger_connected &&
428 !di->ac.charger_connected &&
430 di->autopower = false;
431 ab8500_enable_disable_sw_fallback(di, false);
432 } else if (!di->autopower &&
433 (di->ac.charger_connected ||
434 di->usb.charger_connected)) {
435 di->autopower = true;
436 ab8500_enable_disable_sw_fallback(di, true);
439 power_supply_changed(psy);
442 static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
445 if (connected != di->usb.charger_connected) {
446 dev_dbg(di->dev, "USB connected:%i\n", connected);
447 di->usb.charger_connected = connected;
450 di->flags.vbus_drop_end = false;
453 * Sometimes the platform is configured not to support
454 * USB charging and no psy has been created, but we still
455 * will get these notifications.
457 if (di->usb_chg.psy) {
458 sysfs_notify(&di->usb_chg.psy->dev.kobj, NULL,
463 mutex_lock(&di->charger_attached_mutex);
464 mutex_unlock(&di->charger_attached_mutex);
466 if (is_ab8500(di->parent))
467 queue_delayed_work(di->charger_wq,
468 &di->usb_charger_attached_work,
471 cancel_delayed_work_sync(&di->usb_charger_attached_work);
472 mutex_lock(&di->charger_attached_mutex);
473 mutex_unlock(&di->charger_attached_mutex);
479 * ab8500_charger_get_ac_voltage() - get ac charger voltage
480 * @di: pointer to the ab8500_charger structure
482 * Returns ac charger voltage (on success)
484 static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
488 /* Only measure voltage if the charger is connected */
489 if (di->ac.charger_connected) {
490 ret = iio_read_channel_processed(di->adc_main_charger_v, &vch);
492 dev_err(di->dev, "%s ADC conv failed,\n", __func__);
500 * ab8500_charger_ac_cv() - check if the main charger is in CV mode
501 * @di: pointer to the ab8500_charger structure
503 * Returns ac charger CV mode (on success) else error code
505 static int ab8500_charger_ac_cv(struct ab8500_charger *di)
510 /* Only check CV mode if the charger is online */
511 if (di->ac.charger_online) {
512 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
513 AB8500_CH_STATUS1_REG, &val);
515 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
519 if (val & MAIN_CH_CV_ON)
529 * ab8500_charger_get_vbus_voltage() - get vbus voltage
530 * @di: pointer to the ab8500_charger structure
532 * This function returns the vbus voltage.
533 * Returns vbus voltage (on success)
535 static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
539 /* Only measure voltage if the charger is connected */
540 if (di->usb.charger_connected) {
541 ret = iio_read_channel_processed(di->adc_vbus_v, &vch);
543 dev_err(di->dev, "%s ADC conv failed,\n", __func__);
551 * ab8500_charger_get_usb_current() - get usb charger current
552 * @di: pointer to the ab8500_charger structure
554 * This function returns the usb charger current.
555 * Returns usb current (on success) and error code on failure
557 static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
561 /* Only measure current if the charger is online */
562 if (di->usb.charger_online) {
563 ret = iio_read_channel_processed(di->adc_usb_charger_c, &ich);
565 dev_err(di->dev, "%s ADC conv failed,\n", __func__);
573 * ab8500_charger_get_ac_current() - get ac charger current
574 * @di: pointer to the ab8500_charger structure
576 * This function returns the ac charger current.
577 * Returns ac current (on success) and error code on failure.
579 static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
583 /* Only measure current if the charger is online */
584 if (di->ac.charger_online) {
585 ret = iio_read_channel_processed(di->adc_main_charger_c, &ich);
587 dev_err(di->dev, "%s ADC conv failed,\n", __func__);
595 * ab8500_charger_usb_cv() - check if the usb charger is in CV mode
596 * @di: pointer to the ab8500_charger structure
598 * Returns ac charger CV mode (on success) else error code
600 static int ab8500_charger_usb_cv(struct ab8500_charger *di)
605 /* Only check CV mode if the charger is online */
606 if (di->usb.charger_online) {
607 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
608 AB8500_CH_USBCH_STAT1_REG, &val);
610 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
614 if (val & USB_CH_CV_ON)
626 * ab8500_charger_detect_chargers() - Detect the connected chargers
627 * @di: pointer to the ab8500_charger structure
628 * @probe: if probe, don't delay and wait for HW
630 * Returns the type of charger connected.
631 * For USB it will not mean we can actually charge from it
632 * but that there is a USB cable connected that we have to
633 * identify. This is used during startup when we don't get
634 * interrupts of the charger detection
636 * Returns an integer value, that means,
637 * NO_PW_CONN no power supply is connected
638 * AC_PW_CONN if the AC power supply is connected
639 * USB_PW_CONN if the USB power supply is connected
640 * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected
642 static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe)
644 int result = NO_PW_CONN;
648 /* Check for AC charger */
649 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
650 AB8500_CH_STATUS1_REG, &val);
652 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
656 if (val & MAIN_CH_DET)
659 /* Check for USB charger */
663 * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100
664 * when disconnecting ACA even though no
665 * charger was connected. Try waiting a little
666 * longer than the 100 ms of VBUS_DET_DBNC100...
670 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
671 AB8500_CH_USBCH_STAT1_REG, &val);
673 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
677 "%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__,
679 if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100))
680 result |= USB_PW_CONN;
686 * ab8500_charger_max_usb_curr() - get the max curr for the USB type
687 * @di: pointer to the ab8500_charger structure
688 * @link_status: the identified USB type
690 * Get the maximum current that is allowed to be drawn from the host
691 * based on the USB type.
692 * Returns error code in case of failure else 0 on success
694 static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
695 enum ab8500_charger_link_status link_status)
699 di->usb_device_is_unrecognised = false;
702 * Platform only supports USB 2.0.
703 * This means that charging current from USB source
704 * is maximum 500 mA. Every occurrence of USB_STAT_*_HOST_*
705 * should set USB_CH_IP_CUR_LVL_0P5.
708 switch (link_status) {
709 case USB_STAT_STD_HOST_NC:
710 case USB_STAT_STD_HOST_C_NS:
711 case USB_STAT_STD_HOST_C_S:
712 dev_dbg(di->dev, "USB Type - Standard host is "
713 "detected through USB driver\n");
714 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
717 case USB_STAT_HOST_CHG_HS_CHIRP:
718 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
721 case USB_STAT_HOST_CHG_HS:
722 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
725 case USB_STAT_ACA_RID_C_HS:
726 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P9;
729 case USB_STAT_ACA_RID_A:
731 * Dedicated charger level minus maximum current accessory
732 * can consume (900mA). Closest level is 500mA
734 dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n");
735 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
738 case USB_STAT_ACA_RID_B:
740 * Dedicated charger level minus 120mA (20mA for ACA and
741 * 100mA for potential accessory). Closest level is 1300mA
743 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P3;
744 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
745 di->max_usb_in_curr.usb_type_max);
748 case USB_STAT_HOST_CHG_NM:
749 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
752 case USB_STAT_DEDICATED_CHG:
753 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
756 case USB_STAT_ACA_RID_C_HS_CHIRP:
757 case USB_STAT_ACA_RID_C_NM:
758 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
761 case USB_STAT_NOT_CONFIGURED:
762 if (di->vbus_detected) {
763 di->usb_device_is_unrecognised = true;
764 dev_dbg(di->dev, "USB Type - Legacy charger.\n");
765 di->max_usb_in_curr.usb_type_max =
766 USB_CH_IP_CUR_LVL_1P5;
770 case USB_STAT_HM_IDGND:
771 dev_err(di->dev, "USB Type - Charging not allowed\n");
772 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
775 case USB_STAT_RESERVED:
776 if (is_ab8500(di->parent)) {
777 di->flags.vbus_collapse = true;
778 dev_err(di->dev, "USB Type - USB_STAT_RESERVED "
779 "VBUS has collapsed\n");
783 dev_dbg(di->dev, "USB Type - Charging not allowed\n");
784 di->max_usb_in_curr.usb_type_max =
785 USB_CH_IP_CUR_LVL_0P05;
786 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
788 di->max_usb_in_curr.usb_type_max);
792 case USB_STAT_CARKIT_1:
793 case USB_STAT_CARKIT_2:
794 case USB_STAT_ACA_DOCK_CHARGER:
795 case USB_STAT_CHARGER_LINE_1:
796 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
797 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
798 di->max_usb_in_curr.usb_type_max);
800 case USB_STAT_NOT_VALID_LINK:
801 dev_err(di->dev, "USB Type invalid - try charging anyway\n");
802 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
806 dev_err(di->dev, "USB Type - Unknown\n");
807 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
812 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
813 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
814 link_status, di->max_usb_in_curr.set_max);
820 * ab8500_charger_read_usb_type() - read the type of usb connected
821 * @di: pointer to the ab8500_charger structure
823 * Detect the type of the plugged USB
824 * Returns error code in case of failure else 0 on success
826 static int ab8500_charger_read_usb_type(struct ab8500_charger *di)
831 ret = abx500_get_register_interruptible(di->dev,
832 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val);
834 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
837 if (is_ab8500(di->parent))
838 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
839 AB8500_USB_LINE_STAT_REG, &val);
841 ret = abx500_get_register_interruptible(di->dev,
842 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
844 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
848 /* get the USB type */
849 if (is_ab8500(di->parent))
850 val = (val & AB8500_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
852 val = (val & AB8505_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
853 ret = ab8500_charger_max_usb_curr(di,
854 (enum ab8500_charger_link_status) val);
860 * ab8500_charger_detect_usb_type() - get the type of usb connected
861 * @di: pointer to the ab8500_charger structure
863 * Detect the type of the plugged USB
864 * Returns error code in case of failure else 0 on success
866 static int ab8500_charger_detect_usb_type(struct ab8500_charger *di)
872 * On getting the VBUS rising edge detect interrupt there
873 * is a 250ms delay after which the register UsbLineStatus
874 * is filled with valid data.
876 for (i = 0; i < 10; i++) {
878 ret = abx500_get_register_interruptible(di->dev,
879 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG,
881 dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n",
884 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
888 if (is_ab8500(di->parent))
889 ret = abx500_get_register_interruptible(di->dev,
890 AB8500_USB, AB8500_USB_LINE_STAT_REG, &val);
892 ret = abx500_get_register_interruptible(di->dev,
893 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
895 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
898 dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__,
901 * Until the IT source register is read the UsbLineStatus
902 * register is not updated, hence doing the same
906 /* get the USB type */
907 if (is_ab8500(di->parent))
908 val = (val & AB8500_USB_LINK_STATUS) >>
909 USB_LINK_STATUS_SHIFT;
911 val = (val & AB8505_USB_LINK_STATUS) >>
912 USB_LINK_STATUS_SHIFT;
916 ret = ab8500_charger_max_usb_curr(di,
917 (enum ab8500_charger_link_status) val);
923 * This array maps the raw hex value to charger voltage used by the AB8500
924 * Values taken from the UM0836
926 static int ab8500_charger_voltage_map[] = {
1007 static int ab8500_voltage_to_regval(int voltage)
1011 /* Special case for voltage below 3.5V */
1012 if (voltage < ab8500_charger_voltage_map[0])
1013 return LOW_VOLT_REG;
1015 for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) {
1016 if (voltage < ab8500_charger_voltage_map[i])
1020 /* If not last element, return error */
1021 i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1;
1022 if (voltage == ab8500_charger_voltage_map[i])
1028 static int ab8500_current_to_regval(struct ab8500_charger *di, int curr)
1032 if (curr < di->bm->chg_output_curr[0])
1035 for (i = 0; i < di->bm->n_chg_out_curr; i++) {
1036 if (curr < di->bm->chg_output_curr[i])
1040 /* If not last element, return error */
1041 i = di->bm->n_chg_out_curr - 1;
1042 if (curr == di->bm->chg_output_curr[i])
1048 static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr)
1052 if (curr < di->bm->chg_input_curr[0])
1055 for (i = 0; i < di->bm->n_chg_in_curr; i++) {
1056 if (curr < di->bm->chg_input_curr[i])
1060 /* If not last element, return error */
1061 i = di->bm->n_chg_in_curr - 1;
1062 if (curr == di->bm->chg_input_curr[i])
1069 * ab8500_charger_get_usb_cur() - get usb current
1070 * @di: pointer to the ab8500_charger structre
1072 * The usb stack provides the maximum current that can be drawn from
1073 * the standard usb host. This will be in mA.
1074 * This function converts current in mA to a value that can be written
1075 * to the register. Returns -1 if charging is not allowed
1077 static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
1080 switch (di->usb_state.usb_current) {
1082 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P09;
1085 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P19;
1088 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P29;
1091 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P38;
1094 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
1097 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
1101 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
1106 * ab8500_charger_check_continue_stepping() - Check to allow stepping
1107 * @di: pointer to the ab8500_charger structure
1108 * @reg: select what charger register to check
1110 * Check if current stepping should be allowed to continue.
1111 * Checks if charger source has not collapsed. If it has, further stepping
1114 static bool ab8500_charger_check_continue_stepping(struct ab8500_charger *di,
1117 if (reg == AB8500_USBCH_IPT_CRNTLVL_REG)
1118 return !di->flags.vbus_drop_end;
1124 * ab8500_charger_set_current() - set charger current
1125 * @di: pointer to the ab8500_charger structure
1126 * @ich: charger current, in mA
1127 * @reg: select what charger register to set
1129 * Set charger current.
1130 * There is no state machine in the AB to step up/down the charger
1131 * current to avoid dips and spikes on MAIN, VBUS and VBAT when
1132 * charging is started. Instead we need to implement
1133 * this charger current step-up/down here.
1134 * Returns error code in case of failure else 0(on success)
1136 static int ab8500_charger_set_current(struct ab8500_charger *di,
1140 int curr_index, prev_curr_index, shift_value, i;
1143 bool no_stepping = false;
1145 atomic_inc(&di->current_stepping_sessions);
1147 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1150 dev_err(di->dev, "%s read failed\n", __func__);
1151 goto exit_set_current;
1155 case AB8500_MCH_IPT_CURLVL_REG:
1156 shift_value = MAIN_CH_INPUT_CURR_SHIFT;
1157 prev_curr_index = (reg_value >> shift_value);
1158 curr_index = ab8500_current_to_regval(di, ich);
1159 step_udelay = STEP_UDELAY;
1160 if (!di->ac.charger_connected)
1163 case AB8500_USBCH_IPT_CRNTLVL_REG:
1164 shift_value = VBUS_IN_CURR_LIM_SHIFT;
1165 prev_curr_index = (reg_value >> shift_value);
1166 curr_index = ab8500_vbus_in_curr_to_regval(di, ich);
1167 step_udelay = STEP_UDELAY * 100;
1169 if (!di->usb.charger_connected)
1172 case AB8500_CH_OPT_CRNTLVL_REG:
1174 prev_curr_index = (reg_value >> shift_value);
1175 curr_index = ab8500_current_to_regval(di, ich);
1176 step_udelay = STEP_UDELAY;
1177 if (curr_index && (curr_index - prev_curr_index) > 1)
1180 if (!di->usb.charger_connected && !di->ac.charger_connected)
1185 dev_err(di->dev, "%s current register not valid\n", __func__);
1187 goto exit_set_current;
1190 if (curr_index < 0) {
1191 dev_err(di->dev, "requested current limit out-of-range\n");
1193 goto exit_set_current;
1196 /* only update current if it's been changed */
1197 if (prev_curr_index == curr_index) {
1198 dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n",
1201 goto exit_set_current;
1204 dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n",
1205 __func__, ich, reg);
1208 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1209 reg, (u8)curr_index << shift_value);
1211 dev_err(di->dev, "%s write failed\n", __func__);
1212 } else if (prev_curr_index > curr_index) {
1213 for (i = prev_curr_index - 1; i >= curr_index; i--) {
1214 dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n",
1215 (u8) i << shift_value, reg);
1216 ret = abx500_set_register_interruptible(di->dev,
1217 AB8500_CHARGER, reg, (u8)i << shift_value);
1219 dev_err(di->dev, "%s write failed\n", __func__);
1220 goto exit_set_current;
1222 if (i != curr_index)
1223 usleep_range(step_udelay, step_udelay * 2);
1227 for (i = prev_curr_index + 1; i <= curr_index && allow; i++) {
1228 dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n",
1229 (u8)i << shift_value, reg);
1230 ret = abx500_set_register_interruptible(di->dev,
1231 AB8500_CHARGER, reg, (u8)i << shift_value);
1233 dev_err(di->dev, "%s write failed\n", __func__);
1234 goto exit_set_current;
1236 if (i != curr_index)
1237 usleep_range(step_udelay, step_udelay * 2);
1239 allow = ab8500_charger_check_continue_stepping(di, reg);
1244 atomic_dec(&di->current_stepping_sessions);
1250 * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
1251 * @di: pointer to the ab8500_charger structure
1252 * @ich_in: charger input current limit
1254 * Sets the current that can be drawn from the USB host
1255 * Returns error code in case of failure else 0(on success)
1257 static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
1263 /* We should always use to lowest current limit */
1264 min_value = min(di->bm->chg_params->usb_curr_max, ich_in);
1265 if (di->max_usb_in_curr.set_max > 0)
1266 min_value = min(di->max_usb_in_curr.set_max, min_value);
1268 if (di->usb_state.usb_current >= 0)
1269 min_value = min(di->usb_state.usb_current, min_value);
1271 switch (min_value) {
1273 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1274 min_value = USB_CH_IP_CUR_LVL_0P05;
1277 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1278 min_value = USB_CH_IP_CUR_LVL_0P45;
1284 dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value);
1286 mutex_lock(&di->usb_ipt_crnt_lock);
1287 ret = ab8500_charger_set_current(di, min_value,
1288 AB8500_USBCH_IPT_CRNTLVL_REG);
1289 mutex_unlock(&di->usb_ipt_crnt_lock);
1295 * ab8500_charger_set_main_in_curr() - set main charger input current
1296 * @di: pointer to the ab8500_charger structure
1297 * @ich_in: input charger current, in mA
1299 * Set main charger input current.
1300 * Returns error code in case of failure else 0(on success)
1302 static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di,
1305 return ab8500_charger_set_current(di, ich_in,
1306 AB8500_MCH_IPT_CURLVL_REG);
1310 * ab8500_charger_set_output_curr() - set charger output current
1311 * @di: pointer to the ab8500_charger structure
1312 * @ich_out: output charger current, in mA
1314 * Set charger output current.
1315 * Returns error code in case of failure else 0(on success)
1317 static int ab8500_charger_set_output_curr(struct ab8500_charger *di,
1320 return ab8500_charger_set_current(di, ich_out,
1321 AB8500_CH_OPT_CRNTLVL_REG);
1325 * ab8500_charger_led_en() - turn on/off chargign led
1326 * @di: pointer to the ab8500_charger structure
1327 * @on: flag to turn on/off the chargign led
1329 * Power ON/OFF charging LED indication
1330 * Returns error code in case of failure else 0(on success)
1332 static int ab8500_charger_led_en(struct ab8500_charger *di, int on)
1337 /* Power ON charging LED indicator, set LED current to 5mA */
1338 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1339 AB8500_LED_INDICATOR_PWM_CTRL,
1340 (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA));
1342 dev_err(di->dev, "Power ON LED failed\n");
1345 /* LED indicator PWM duty cycle 252/256 */
1346 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1347 AB8500_LED_INDICATOR_PWM_DUTY,
1348 LED_INDICATOR_PWM_DUTY_252_256);
1350 dev_err(di->dev, "Set LED PWM duty cycle failed\n");
1354 /* Power off charging LED indicator */
1355 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1356 AB8500_LED_INDICATOR_PWM_CTRL,
1357 LED_INDICATOR_PWM_DIS);
1359 dev_err(di->dev, "Power-off LED failed\n");
1368 * ab8500_charger_ac_en() - enable or disable ac charging
1369 * @di: pointer to the ab8500_charger structure
1370 * @enable: enable/disable flag
1371 * @vset: charging voltage
1372 * @iset: charging current
1374 * Enable/Disable AC/Mains charging and turns on/off the charging led
1377 static int ab8500_charger_ac_en(struct ux500_charger *charger,
1378 int enable, int vset, int iset)
1383 int input_curr_index;
1386 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1389 /* Check if AC is connected */
1390 if (!di->ac.charger_connected) {
1391 dev_err(di->dev, "AC charger not connected\n");
1395 /* Enable AC charging */
1396 dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset);
1399 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1400 * will be triggered every time we enable the VDD ADC supply.
1401 * This will turn off charging for a short while.
1402 * It can be avoided by having the supply on when
1403 * there is a charger enabled. Normally the VDD ADC supply
1404 * is enabled every time a GPADC conversion is triggered.
1405 * We will force it to be enabled from this driver to have
1406 * the GPADC module independent of the AB8500 chargers
1408 if (!di->vddadc_en_ac) {
1409 ret = regulator_enable(di->regu);
1412 "Failed to enable regulator\n");
1414 di->vddadc_en_ac = true;
1417 /* Check if the requested voltage or current is valid */
1418 volt_index = ab8500_voltage_to_regval(vset);
1419 curr_index = ab8500_current_to_regval(di, iset);
1420 input_curr_index = ab8500_current_to_regval(di,
1421 di->bm->chg_params->ac_curr_max);
1422 if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
1424 "Charger voltage or current too high, "
1425 "charging not started\n");
1429 /* ChVoltLevel: maximum battery charging voltage */
1430 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1431 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1433 dev_err(di->dev, "%s write failed\n", __func__);
1436 /* MainChInputCurr: current that can be drawn from the charger*/
1437 ret = ab8500_charger_set_main_in_curr(di,
1438 di->bm->chg_params->ac_curr_max);
1440 dev_err(di->dev, "%s Failed to set MainChInputCurr\n",
1444 /* ChOutputCurentLevel: protected output current */
1445 ret = ab8500_charger_set_output_curr(di, iset);
1447 dev_err(di->dev, "%s "
1448 "Failed to set ChOutputCurentLevel\n",
1453 /* Check if VBAT overshoot control should be enabled */
1454 if (!di->bm->enable_overshoot)
1455 overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;
1457 /* Enable Main Charger */
1458 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1459 AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot);
1461 dev_err(di->dev, "%s write failed\n", __func__);
1465 /* Power on charging LED indication */
1466 ret = ab8500_charger_led_en(di, true);
1468 dev_err(di->dev, "failed to enable LED\n");
1470 di->ac.charger_online = 1;
1472 /* Disable AC charging */
1473 if (is_ab8500_1p1_or_earlier(di->parent)) {
1475 * For ABB revision 1.0 and 1.1 there is a bug in the
1476 * watchdog logic. That means we have to continuously
1477 * kick the charger watchdog even when no charger is
1478 * connected. This is only valid once the AC charger
1479 * has been enabled. This is a bug that is not handled
1480 * by the algorithm and the watchdog have to be kicked
1481 * by the charger driver when the AC charger
1485 queue_delayed_work(di->charger_wq,
1487 round_jiffies(WD_KICK_INTERVAL));
1491 * We can't turn off charging completely
1492 * due to a bug in AB8500 cut1.
1493 * If we do, charging will not start again.
1494 * That is why we set the lowest voltage
1495 * and current possible
1497 ret = abx500_set_register_interruptible(di->dev,
1499 AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5);
1502 "%s write failed\n", __func__);
1506 ret = ab8500_charger_set_output_curr(di, 0);
1508 dev_err(di->dev, "%s "
1509 "Failed to set ChOutputCurentLevel\n",
1514 ret = abx500_set_register_interruptible(di->dev,
1516 AB8500_MCH_CTRL1, 0);
1519 "%s write failed\n", __func__);
1524 ret = ab8500_charger_led_en(di, false);
1526 dev_err(di->dev, "failed to disable LED\n");
1528 di->ac.charger_online = 0;
1529 di->ac.wd_expired = false;
1531 /* Disable regulator if enabled */
1532 if (di->vddadc_en_ac) {
1533 regulator_disable(di->regu);
1534 di->vddadc_en_ac = false;
1537 dev_dbg(di->dev, "%s Disabled AC charging\n", __func__);
1539 ab8500_power_supply_changed(di, di->ac_chg.psy);
1545 * ab8500_charger_usb_en() - enable usb charging
1546 * @di: pointer to the ab8500_charger structure
1547 * @enable: enable/disable flag
1548 * @vset: charging voltage
1549 * @ich_out: charger output current
1551 * Enable/Disable USB charging and turns on/off the charging led respectively.
1552 * Returns error code in case of failure else 0(on success)
1554 static int ab8500_charger_usb_en(struct ux500_charger *charger,
1555 int enable, int vset, int ich_out)
1562 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1565 /* Check if USB is connected */
1566 if (!di->usb.charger_connected) {
1567 dev_err(di->dev, "USB charger not connected\n");
1572 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1573 * will be triggered every time we enable the VDD ADC supply.
1574 * This will turn off charging for a short while.
1575 * It can be avoided by having the supply on when
1576 * there is a charger enabled. Normally the VDD ADC supply
1577 * is enabled every time a GPADC conversion is triggered.
1578 * We will force it to be enabled from this driver to have
1579 * the GPADC module independent of the AB8500 chargers
1581 if (!di->vddadc_en_usb) {
1582 ret = regulator_enable(di->regu);
1585 "Failed to enable regulator\n");
1587 di->vddadc_en_usb = true;
1590 /* Enable USB charging */
1591 dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out);
1593 /* Check if the requested voltage or current is valid */
1594 volt_index = ab8500_voltage_to_regval(vset);
1595 curr_index = ab8500_current_to_regval(di, ich_out);
1596 if (volt_index < 0 || curr_index < 0) {
1598 "Charger voltage or current too high, "
1599 "charging not started\n");
1604 * ChVoltLevel: max voltage up to which battery can be
1607 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1608 AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1610 dev_err(di->dev, "%s write failed\n", __func__);
1613 /* Check if VBAT overshoot control should be enabled */
1614 if (!di->bm->enable_overshoot)
1615 overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;
1617 /* Enable USB Charger */
1619 "Enabling USB with write to AB8500_USBCH_CTRL1_REG\n");
1620 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1621 AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot);
1623 dev_err(di->dev, "%s write failed\n", __func__);
1627 /* If success power on charging LED indication */
1628 ret = ab8500_charger_led_en(di, true);
1630 dev_err(di->dev, "failed to enable LED\n");
1632 di->usb.charger_online = 1;
1634 /* USBChInputCurr: current that can be drawn from the usb */
1635 ret = ab8500_charger_set_vbus_in_curr(di,
1636 di->max_usb_in_curr.usb_type_max);
1638 dev_err(di->dev, "setting USBChInputCurr failed\n");
1642 /* ChOutputCurentLevel: protected output current */
1643 ret = ab8500_charger_set_output_curr(di, ich_out);
1645 dev_err(di->dev, "%s "
1646 "Failed to set ChOutputCurentLevel\n",
1651 queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);
1654 /* Disable USB charging */
1655 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1656 ret = abx500_set_register_interruptible(di->dev,
1658 AB8500_USBCH_CTRL1_REG, 0);
1661 "%s write failed\n", __func__);
1665 ret = ab8500_charger_led_en(di, false);
1667 dev_err(di->dev, "failed to disable LED\n");
1668 /* USBChInputCurr: current that can be drawn from the usb */
1669 ret = ab8500_charger_set_vbus_in_curr(di, 0);
1671 dev_err(di->dev, "setting USBChInputCurr failed\n");
1675 /* ChOutputCurentLevel: protected output current */
1676 ret = ab8500_charger_set_output_curr(di, 0);
1678 dev_err(di->dev, "%s "
1679 "Failed to reset ChOutputCurentLevel\n",
1683 di->usb.charger_online = 0;
1684 di->usb.wd_expired = false;
1686 /* Disable regulator if enabled */
1687 if (di->vddadc_en_usb) {
1688 regulator_disable(di->regu);
1689 di->vddadc_en_usb = false;
1692 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1694 /* Cancel any pending Vbat check work */
1695 cancel_delayed_work(&di->check_vbat_work);
1698 ab8500_power_supply_changed(di, di->usb_chg.psy);
1703 static int ab8500_external_charger_prepare(struct notifier_block *charger_nb,
1704 unsigned long event, void *data)
1707 struct device *dev = data;
1708 /*Toggle External charger control pin*/
1709 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1710 AB8500_SYS_CHARGER_CONTROL_REG,
1711 EXTERNAL_CHARGER_DISABLE_REG_VAL);
1713 dev_err(dev, "write reg failed %d\n", ret);
1716 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1717 AB8500_SYS_CHARGER_CONTROL_REG,
1718 EXTERNAL_CHARGER_ENABLE_REG_VAL);
1720 dev_err(dev, "Write reg failed %d\n", ret);
1727 * ab8500_charger_usb_check_enable() - enable usb charging
1728 * @charger: pointer to the ux500_charger structure
1729 * @vset: charging voltage
1730 * @iset: charger output current
1732 * Check if the VBUS charger has been disconnected and reconnected without
1733 * AB8500 rising an interrupt. Returns 0 on success.
1735 static int ab8500_charger_usb_check_enable(struct ux500_charger *charger,
1741 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1743 if (!di->usb.charger_connected)
1746 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1747 AB8500_USBCH_CTRL1_REG, &usbch_ctrl1);
1749 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1752 dev_dbg(di->dev, "USB charger ctrl: 0x%02x\n", usbch_ctrl1);
1754 if (!(usbch_ctrl1 & USB_CH_ENA)) {
1755 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1757 ret = abx500_mask_and_set_register_interruptible(di->dev,
1758 AB8500_CHARGER, AB8500_CHARGER_CTRL,
1759 DROP_COUNT_RESET, DROP_COUNT_RESET);
1761 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1765 ret = ab8500_charger_usb_en(&di->usb_chg, true, vset, iset);
1767 dev_err(di->dev, "Failed to enable VBUS charger %d\n",
1776 * ab8500_charger_ac_check_enable() - enable usb charging
1777 * @charger: pointer to the ux500_charger structure
1778 * @vset: charging voltage
1779 * @iset: charger output current
1781 * Check if the AC charger has been disconnected and reconnected without
1782 * AB8500 rising an interrupt. Returns 0 on success.
1784 static int ab8500_charger_ac_check_enable(struct ux500_charger *charger,
1787 u8 mainch_ctrl1 = 0;
1790 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1792 if (!di->ac.charger_connected)
1795 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1796 AB8500_MCH_CTRL1, &mainch_ctrl1);
1798 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1801 dev_dbg(di->dev, "AC charger ctrl: 0x%02x\n", mainch_ctrl1);
1803 if (!(mainch_ctrl1 & MAIN_CH_ENA)) {
1804 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1806 ret = abx500_mask_and_set_register_interruptible(di->dev,
1807 AB8500_CHARGER, AB8500_CHARGER_CTRL,
1808 DROP_COUNT_RESET, DROP_COUNT_RESET);
1811 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1815 ret = ab8500_charger_ac_en(&di->usb_chg, true, vset, iset);
1817 dev_err(di->dev, "failed to enable AC charger %d\n",
1826 * ab8500_charger_watchdog_kick() - kick charger watchdog
1827 * @di: pointer to the ab8500_charger structure
1829 * Kick charger watchdog
1830 * Returns error code in case of failure else 0(on success)
1832 static int ab8500_charger_watchdog_kick(struct ux500_charger *charger)
1835 struct ab8500_charger *di;
1837 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
1838 di = to_ab8500_charger_ac_device_info(charger);
1839 else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1840 di = to_ab8500_charger_usb_device_info(charger);
1844 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1845 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
1847 dev_err(di->dev, "Failed to kick WD!\n");
1853 * ab8500_charger_update_charger_current() - update charger current
1854 * @di: pointer to the ab8500_charger structure
1856 * Update the charger output current for the specified charger
1857 * Returns error code in case of failure else 0(on success)
1859 static int ab8500_charger_update_charger_current(struct ux500_charger *charger,
1863 struct ab8500_charger *di;
1865 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
1866 di = to_ab8500_charger_ac_device_info(charger);
1867 else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1868 di = to_ab8500_charger_usb_device_info(charger);
1872 ret = ab8500_charger_set_output_curr(di, ich_out);
1874 dev_err(di->dev, "%s "
1875 "Failed to set ChOutputCurentLevel\n",
1880 /* Reset the main and usb drop input current measurement counter */
1881 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1882 AB8500_CHARGER_CTRL, DROP_COUNT_RESET);
1884 dev_err(di->dev, "%s write failed\n", __func__);
1891 static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
1893 struct power_supply *psy;
1894 struct power_supply *ext = dev_get_drvdata(dev);
1895 const char **supplicants = (const char **)ext->supplied_to;
1896 struct ab8500_charger *di;
1897 union power_supply_propval ret;
1899 struct ux500_charger *usb_chg;
1901 usb_chg = (struct ux500_charger *)data;
1904 di = to_ab8500_charger_usb_device_info(usb_chg);
1906 /* For all psy where the driver name appears in any supplied_to */
1907 j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
1911 /* Go through all properties for the psy */
1912 for (j = 0; j < ext->desc->num_properties; j++) {
1913 enum power_supply_property prop;
1914 prop = ext->desc->properties[j];
1916 if (power_supply_get_property(ext, prop, &ret))
1920 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1921 switch (ext->desc->type) {
1922 case POWER_SUPPLY_TYPE_BATTERY:
1923 di->vbat = ret.intval / 1000;
1937 * ab8500_charger_check_vbat_work() - keep vbus current within spec
1938 * @work pointer to the work_struct structure
1940 * Due to a asic bug it is necessary to lower the input current to the vbus
1941 * charger when charging with at some specific levels. This issue is only valid
1942 * for below a certain battery voltage. This function makes sure that the
1943 * the allowed current limit isn't exceeded.
1945 static void ab8500_charger_check_vbat_work(struct work_struct *work)
1948 struct ab8500_charger *di = container_of(work,
1949 struct ab8500_charger, check_vbat_work.work);
1951 class_for_each_device(power_supply_class, NULL,
1952 di->usb_chg.psy, ab8500_charger_get_ext_psy_data);
1954 /* First run old_vbat is 0. */
1955 if (di->old_vbat == 0)
1956 di->old_vbat = di->vbat;
1958 if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED &&
1959 di->vbat <= VBAT_TRESH_IP_CUR_RED) ||
1960 (di->old_vbat > VBAT_TRESH_IP_CUR_RED &&
1961 di->vbat > VBAT_TRESH_IP_CUR_RED))) {
1963 dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d,"
1964 " old: %d\n", di->max_usb_in_curr.usb_type_max,
1965 di->vbat, di->old_vbat);
1966 ab8500_charger_set_vbus_in_curr(di,
1967 di->max_usb_in_curr.usb_type_max);
1968 power_supply_changed(di->usb_chg.psy);
1971 di->old_vbat = di->vbat;
1974 * No need to check the battery voltage every second when not close to
1977 if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) &&
1978 (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100)))
1981 queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ);
1985 * ab8500_charger_check_hw_failure_work() - check main charger failure
1986 * @work: pointer to the work_struct structure
1988 * Work queue function for checking the main charger status
1990 static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
1995 struct ab8500_charger *di = container_of(work,
1996 struct ab8500_charger, check_hw_failure_work.work);
1998 /* Check if the status bits for HW failure is still active */
1999 if (di->flags.mainextchnotok) {
2000 ret = abx500_get_register_interruptible(di->dev,
2001 AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value);
2003 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2006 if (!(reg_value & MAIN_CH_NOK)) {
2007 di->flags.mainextchnotok = false;
2008 ab8500_power_supply_changed(di, di->ac_chg.psy);
2011 if (di->flags.vbus_ovv) {
2012 ret = abx500_get_register_interruptible(di->dev,
2013 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG,
2016 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2019 if (!(reg_value & VBUS_OVV_TH)) {
2020 di->flags.vbus_ovv = false;
2021 ab8500_power_supply_changed(di, di->usb_chg.psy);
2024 /* If we still have a failure, schedule a new check */
2025 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
2026 queue_delayed_work(di->charger_wq,
2027 &di->check_hw_failure_work, round_jiffies(HZ));
2032 * ab8500_charger_kick_watchdog_work() - kick the watchdog
2033 * @work: pointer to the work_struct structure
2035 * Work queue function for kicking the charger watchdog.
2037 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
2038 * logic. That means we have to continuously kick the charger
2039 * watchdog even when no charger is connected. This is only
2040 * valid once the AC charger has been enabled. This is
2041 * a bug that is not handled by the algorithm and the
2042 * watchdog have to be kicked by the charger driver
2043 * when the AC charger is disabled
2045 static void ab8500_charger_kick_watchdog_work(struct work_struct *work)
2049 struct ab8500_charger *di = container_of(work,
2050 struct ab8500_charger, kick_wd_work.work);
2052 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
2053 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
2055 dev_err(di->dev, "Failed to kick WD!\n");
2057 /* Schedule a new watchdog kick */
2058 queue_delayed_work(di->charger_wq,
2059 &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL));
2063 * ab8500_charger_ac_work() - work to get and set main charger status
2064 * @work: pointer to the work_struct structure
2066 * Work queue function for checking the main charger status
2068 static void ab8500_charger_ac_work(struct work_struct *work)
2072 struct ab8500_charger *di = container_of(work,
2073 struct ab8500_charger, ac_work);
2076 * Since we can't be sure that the events are received
2077 * synchronously, we have the check if the main charger is
2078 * connected by reading the status register
2080 ret = ab8500_charger_detect_chargers(di, false);
2084 if (ret & AC_PW_CONN) {
2085 di->ac.charger_connected = 1;
2088 di->ac.charger_connected = 0;
2091 ab8500_power_supply_changed(di, di->ac_chg.psy);
2092 sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
2095 static void ab8500_charger_usb_attached_work(struct work_struct *work)
2097 struct ab8500_charger *di = container_of(work,
2098 struct ab8500_charger,
2099 usb_charger_attached_work.work);
2100 int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC);
2104 for (i = 0; i < 10; i++) {
2105 ret = abx500_get_register_interruptible(di->dev,
2107 AB8500_CH_USBCH_STAT1_REG,
2110 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2113 if ((statval & usbch) != usbch)
2116 msleep(CHARGER_STATUS_POLL);
2119 ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0);
2121 mutex_lock(&di->charger_attached_mutex);
2122 mutex_unlock(&di->charger_attached_mutex);
2127 queue_delayed_work(di->charger_wq,
2128 &di->usb_charger_attached_work,
2132 static void ab8500_charger_ac_attached_work(struct work_struct *work)
2135 struct ab8500_charger *di = container_of(work,
2136 struct ab8500_charger,
2137 ac_charger_attached_work.work);
2138 int mainch = (MAIN_CH_STATUS2_MAINCHGDROP |
2139 MAIN_CH_STATUS2_MAINCHARGERDETDBNC);
2143 for (i = 0; i < 10; i++) {
2144 ret = abx500_get_register_interruptible(di->dev,
2146 AB8500_CH_STATUS2_REG,
2149 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2153 if ((statval & mainch) != mainch)
2156 msleep(CHARGER_STATUS_POLL);
2159 ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0);
2160 queue_work(di->charger_wq, &di->ac_work);
2162 mutex_lock(&di->charger_attached_mutex);
2163 mutex_unlock(&di->charger_attached_mutex);
2168 queue_delayed_work(di->charger_wq,
2169 &di->ac_charger_attached_work,
2174 * ab8500_charger_detect_usb_type_work() - work to detect USB type
2175 * @work: Pointer to the work_struct structure
2177 * Detect the type of USB plugged
2179 static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
2183 struct ab8500_charger *di = container_of(work,
2184 struct ab8500_charger, detect_usb_type_work);
2187 * Since we can't be sure that the events are received
2188 * synchronously, we have the check if is
2189 * connected by reading the status register
2191 ret = ab8500_charger_detect_chargers(di, false);
2195 if (!(ret & USB_PW_CONN)) {
2196 dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__);
2197 di->vbus_detected = false;
2198 ab8500_charger_set_usb_connected(di, false);
2199 ab8500_power_supply_changed(di, di->usb_chg.psy);
2201 dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__);
2202 di->vbus_detected = true;
2204 if (is_ab8500_1p1_or_earlier(di->parent)) {
2205 ret = ab8500_charger_detect_usb_type(di);
2207 ab8500_charger_set_usb_connected(di, true);
2208 ab8500_power_supply_changed(di,
2213 * For ABB cut2.0 and onwards we have an IRQ,
2214 * USB_LINK_STATUS that will be triggered when the USB
2215 * link status changes. The exception is USB connected
2216 * during startup. Then we don't get a
2217 * USB_LINK_STATUS IRQ
2219 if (di->vbus_detected_start) {
2220 di->vbus_detected_start = false;
2221 ret = ab8500_charger_detect_usb_type(di);
2223 ab8500_charger_set_usb_connected(di,
2225 ab8500_power_supply_changed(di,
2234 * ab8500_charger_usb_link_attach_work() - work to detect USB type
2235 * @work: pointer to the work_struct structure
2237 * Detect the type of USB plugged
2239 static void ab8500_charger_usb_link_attach_work(struct work_struct *work)
2241 struct ab8500_charger *di =
2242 container_of(work, struct ab8500_charger, attach_work.work);
2245 /* Update maximum input current if USB enumeration is not detected */
2246 if (!di->usb.charger_online) {
2247 ret = ab8500_charger_set_vbus_in_curr(di,
2248 di->max_usb_in_curr.usb_type_max);
2253 ab8500_charger_set_usb_connected(di, true);
2254 ab8500_power_supply_changed(di, di->usb_chg.psy);
2258 * ab8500_charger_usb_link_status_work() - work to detect USB type
2259 * @work: pointer to the work_struct structure
2261 * Detect the type of USB plugged
2263 static void ab8500_charger_usb_link_status_work(struct work_struct *work)
2265 int detected_chargers;
2270 struct ab8500_charger *di = container_of(work,
2271 struct ab8500_charger, usb_link_status_work);
2274 * Since we can't be sure that the events are received
2275 * synchronously, we have the check if is
2276 * connected by reading the status register
2278 detected_chargers = ab8500_charger_detect_chargers(di, false);
2279 if (detected_chargers < 0)
2283 * Some chargers that breaks the USB spec is
2284 * identified as invalid by AB8500 and it refuse
2285 * to start the charging process. but by jumping
2286 * through a few hoops it can be forced to start.
2288 if (is_ab8500(di->parent))
2289 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2290 AB8500_USB_LINE_STAT_REG, &val);
2292 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2293 AB8500_USB_LINK1_STAT_REG, &val);
2296 dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val);
2298 dev_dbg(di->dev, "Error reading USB link status\n");
2300 if (is_ab8500(di->parent))
2301 link_status = AB8500_USB_LINK_STATUS;
2303 link_status = AB8505_USB_LINK_STATUS;
2305 if (detected_chargers & USB_PW_CONN) {
2306 if (((val & link_status) >> USB_LINK_STATUS_SHIFT) ==
2307 USB_STAT_NOT_VALID_LINK &&
2308 di->invalid_charger_detect_state == 0) {
2310 "Invalid charger detected, state= 0\n");
2312 abx500_mask_and_set_register_interruptible(di->dev,
2313 AB8500_CHARGER, AB8500_USBCH_CTRL1_REG,
2314 USB_CH_ENA, USB_CH_ENA);
2315 /*Enable charger detection*/
2316 abx500_mask_and_set_register_interruptible(di->dev,
2317 AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2318 USB_CH_DET, USB_CH_DET);
2319 di->invalid_charger_detect_state = 1;
2320 /*exit and wait for new link status interrupt.*/
2324 if (di->invalid_charger_detect_state == 1) {
2326 "Invalid charger detected, state= 1\n");
2327 /*Stop charger detection*/
2328 abx500_mask_and_set_register_interruptible(di->dev,
2329 AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2331 /*Check link status*/
2332 if (is_ab8500(di->parent))
2333 ret = abx500_get_register_interruptible(di->dev,
2334 AB8500_USB, AB8500_USB_LINE_STAT_REG,
2337 ret = abx500_get_register_interruptible(di->dev,
2338 AB8500_USB, AB8500_USB_LINK1_STAT_REG,
2341 dev_dbg(di->dev, "USB link status= 0x%02x\n",
2342 (val & link_status) >> USB_LINK_STATUS_SHIFT);
2343 di->invalid_charger_detect_state = 2;
2346 di->invalid_charger_detect_state = 0;
2349 if (!(detected_chargers & USB_PW_CONN)) {
2350 di->vbus_detected = false;
2351 ab8500_charger_set_usb_connected(di, false);
2352 ab8500_power_supply_changed(di, di->usb_chg.psy);
2356 dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__);
2357 di->vbus_detected = true;
2358 ret = ab8500_charger_read_usb_type(di);
2360 if (ret == -ENXIO) {
2361 /* No valid charger type detected */
2362 ab8500_charger_set_usb_connected(di, false);
2363 ab8500_power_supply_changed(di, di->usb_chg.psy);
2368 if (di->usb_device_is_unrecognised) {
2370 "Potential Legacy Charger device. "
2371 "Delay work for %d msec for USB enum "
2373 WAIT_ACA_RID_ENUMERATION);
2374 queue_delayed_work(di->charger_wq,
2376 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2377 } else if (di->is_aca_rid == 1) {
2378 /* Only wait once */
2381 "%s Wait %d msec for USB enum to finish",
2382 __func__, WAIT_ACA_RID_ENUMERATION);
2383 queue_delayed_work(di->charger_wq,
2385 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2387 queue_delayed_work(di->charger_wq,
2393 static void ab8500_charger_usb_state_changed_work(struct work_struct *work)
2396 unsigned long flags;
2398 struct ab8500_charger *di = container_of(work,
2399 struct ab8500_charger, usb_state_changed_work.work);
2401 if (!di->vbus_detected) {
2403 "%s !di->vbus_detected\n",
2408 spin_lock_irqsave(&di->usb_state.usb_lock, flags);
2409 di->usb_state.state = di->usb_state.state_tmp;
2410 di->usb_state.usb_current = di->usb_state.usb_current_tmp;
2411 spin_unlock_irqrestore(&di->usb_state.usb_lock, flags);
2413 dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n",
2414 __func__, di->usb_state.state, di->usb_state.usb_current);
2416 switch (di->usb_state.state) {
2417 case AB8500_BM_USB_STATE_RESET_HS:
2418 case AB8500_BM_USB_STATE_RESET_FS:
2419 case AB8500_BM_USB_STATE_SUSPEND:
2420 case AB8500_BM_USB_STATE_MAX:
2421 ab8500_charger_set_usb_connected(di, false);
2422 ab8500_power_supply_changed(di, di->usb_chg.psy);
2425 case AB8500_BM_USB_STATE_RESUME:
2427 * when suspend->resume there should be delay
2428 * of 1sec for enabling charging
2432 case AB8500_BM_USB_STATE_CONFIGURED:
2434 * USB is configured, enable charging with the charging
2435 * input current obtained from USB driver
2437 if (!ab8500_charger_get_usb_cur(di)) {
2438 /* Update maximum input current */
2439 ret = ab8500_charger_set_vbus_in_curr(di,
2440 di->max_usb_in_curr.usb_type_max);
2444 ab8500_charger_set_usb_connected(di, true);
2445 ab8500_power_supply_changed(di, di->usb_chg.psy);
2455 * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status
2456 * @work: pointer to the work_struct structure
2458 * Work queue function for checking the USB charger Not OK status
2460 static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work)
2466 struct ab8500_charger *di = container_of(work,
2467 struct ab8500_charger, check_usbchgnotok_work.work);
2469 /* Check if the status bit for usbchargernotok is still active */
2470 ret = abx500_get_register_interruptible(di->dev,
2471 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value);
2473 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2476 prev_status = di->flags.usbchargernotok;
2478 if (reg_value & VBUS_CH_NOK) {
2479 di->flags.usbchargernotok = true;
2480 /* Check again in 1sec */
2481 queue_delayed_work(di->charger_wq,
2482 &di->check_usbchgnotok_work, HZ);
2484 di->flags.usbchargernotok = false;
2485 di->flags.vbus_collapse = false;
2488 if (prev_status != di->flags.usbchargernotok)
2489 ab8500_power_supply_changed(di, di->usb_chg.psy);
2493 * ab8500_charger_check_main_thermal_prot_work() - check main thermal status
2494 * @work: pointer to the work_struct structure
2496 * Work queue function for checking the Main thermal prot status
2498 static void ab8500_charger_check_main_thermal_prot_work(
2499 struct work_struct *work)
2504 struct ab8500_charger *di = container_of(work,
2505 struct ab8500_charger, check_main_thermal_prot_work);
2507 /* Check if the status bit for main_thermal_prot is still active */
2508 ret = abx500_get_register_interruptible(di->dev,
2509 AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value);
2511 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2514 if (reg_value & MAIN_CH_TH_PROT)
2515 di->flags.main_thermal_prot = true;
2517 di->flags.main_thermal_prot = false;
2519 ab8500_power_supply_changed(di, di->ac_chg.psy);
2523 * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status
2524 * @work: pointer to the work_struct structure
2526 * Work queue function for checking the USB thermal prot status
2528 static void ab8500_charger_check_usb_thermal_prot_work(
2529 struct work_struct *work)
2534 struct ab8500_charger *di = container_of(work,
2535 struct ab8500_charger, check_usb_thermal_prot_work);
2537 /* Check if the status bit for usb_thermal_prot is still active */
2538 ret = abx500_get_register_interruptible(di->dev,
2539 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value);
2541 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2544 if (reg_value & USB_CH_TH_PROT)
2545 di->flags.usb_thermal_prot = true;
2547 di->flags.usb_thermal_prot = false;
2549 ab8500_power_supply_changed(di, di->usb_chg.psy);
2553 * ab8500_charger_mainchunplugdet_handler() - main charger unplugged
2554 * @irq: interrupt number
2555 * @_di: pointer to the ab8500_charger structure
2557 * Returns IRQ status(IRQ_HANDLED)
2559 static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di)
2561 struct ab8500_charger *di = _di;
2563 dev_dbg(di->dev, "Main charger unplugged\n");
2564 queue_work(di->charger_wq, &di->ac_work);
2566 cancel_delayed_work_sync(&di->ac_charger_attached_work);
2567 mutex_lock(&di->charger_attached_mutex);
2568 mutex_unlock(&di->charger_attached_mutex);
2574 * ab8500_charger_mainchplugdet_handler() - main charger plugged
2575 * @irq: interrupt number
2576 * @_di: pointer to the ab8500_charger structure
2578 * Returns IRQ status(IRQ_HANDLED)
2580 static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di)
2582 struct ab8500_charger *di = _di;
2584 dev_dbg(di->dev, "Main charger plugged\n");
2585 queue_work(di->charger_wq, &di->ac_work);
2587 mutex_lock(&di->charger_attached_mutex);
2588 mutex_unlock(&di->charger_attached_mutex);
2590 if (is_ab8500(di->parent))
2591 queue_delayed_work(di->charger_wq,
2592 &di->ac_charger_attached_work,
2598 * ab8500_charger_mainextchnotok_handler() - main charger not ok
2599 * @irq: interrupt number
2600 * @_di: pointer to the ab8500_charger structure
2602 * Returns IRQ status(IRQ_HANDLED)
2604 static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di)
2606 struct ab8500_charger *di = _di;
2608 dev_dbg(di->dev, "Main charger not ok\n");
2609 di->flags.mainextchnotok = true;
2610 ab8500_power_supply_changed(di, di->ac_chg.psy);
2612 /* Schedule a new HW failure check */
2613 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2619 * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger
2620 * thermal protection threshold
2621 * @irq: interrupt number
2622 * @_di: pointer to the ab8500_charger structure
2624 * Returns IRQ status(IRQ_HANDLED)
2626 static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di)
2628 struct ab8500_charger *di = _di;
2631 "Die temp above Main charger thermal protection threshold\n");
2632 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2638 * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger
2639 * thermal protection threshold
2640 * @irq: interrupt number
2641 * @_di: pointer to the ab8500_charger structure
2643 * Returns IRQ status(IRQ_HANDLED)
2645 static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di)
2647 struct ab8500_charger *di = _di;
2650 "Die temp ok for Main charger thermal protection threshold\n");
2651 queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2656 static void ab8500_charger_vbus_drop_end_work(struct work_struct *work)
2658 struct ab8500_charger *di = container_of(work,
2659 struct ab8500_charger, vbus_drop_end_work.work);
2663 di->flags.vbus_drop_end = false;
2665 /* Reset the drop counter */
2666 abx500_set_register_interruptible(di->dev,
2667 AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01);
2669 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
2670 AB8500_CH_USBCH_STAT2_REG, ®_value);
2672 dev_err(di->dev, "%s read failed\n", __func__);
2676 curr = di->bm->chg_input_curr[
2677 reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT];
2679 if (di->max_usb_in_curr.calculated_max != curr) {
2680 /* USB source is collapsing */
2681 di->max_usb_in_curr.calculated_max = curr;
2683 "VBUS input current limiting to %d mA\n",
2684 di->max_usb_in_curr.calculated_max);
2687 * USB source can not give more than this amount.
2688 * Taking more will collapse the source.
2690 di->max_usb_in_curr.set_max =
2691 di->max_usb_in_curr.calculated_max;
2693 "VBUS input current limited to %d mA\n",
2694 di->max_usb_in_curr.set_max);
2697 if (di->usb.charger_connected)
2698 ab8500_charger_set_vbus_in_curr(di,
2699 di->max_usb_in_curr.usb_type_max);
2703 * ab8500_charger_vbusdetf_handler() - VBUS falling detected
2704 * @irq: interrupt number
2705 * @_di: pointer to the ab8500_charger structure
2707 * Returns IRQ status(IRQ_HANDLED)
2709 static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di)
2711 struct ab8500_charger *di = _di;
2713 di->vbus_detected = false;
2714 dev_dbg(di->dev, "VBUS falling detected\n");
2715 queue_work(di->charger_wq, &di->detect_usb_type_work);
2721 * ab8500_charger_vbusdetr_handler() - VBUS rising detected
2722 * @irq: interrupt number
2723 * @_di: pointer to the ab8500_charger structure
2725 * Returns IRQ status(IRQ_HANDLED)
2727 static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di)
2729 struct ab8500_charger *di = _di;
2731 di->vbus_detected = true;
2732 dev_dbg(di->dev, "VBUS rising detected\n");
2734 queue_work(di->charger_wq, &di->detect_usb_type_work);
2740 * ab8500_charger_usblinkstatus_handler() - USB link status has changed
2741 * @irq: interrupt number
2742 * @_di: pointer to the ab8500_charger structure
2744 * Returns IRQ status(IRQ_HANDLED)
2746 static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di)
2748 struct ab8500_charger *di = _di;
2750 dev_dbg(di->dev, "USB link status changed\n");
2752 queue_work(di->charger_wq, &di->usb_link_status_work);
2758 * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger
2759 * thermal protection threshold
2760 * @irq: interrupt number
2761 * @_di: pointer to the ab8500_charger structure
2763 * Returns IRQ status(IRQ_HANDLED)
2765 static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di)
2767 struct ab8500_charger *di = _di;
2770 "Die temp above USB charger thermal protection threshold\n");
2771 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2777 * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger
2778 * thermal protection threshold
2779 * @irq: interrupt number
2780 * @_di: pointer to the ab8500_charger structure
2782 * Returns IRQ status(IRQ_HANDLED)
2784 static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di)
2786 struct ab8500_charger *di = _di;
2789 "Die temp ok for USB charger thermal protection threshold\n");
2790 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2796 * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected
2797 * @irq: interrupt number
2798 * @_di: pointer to the ab8500_charger structure
2800 * Returns IRQ status(IRQ_HANDLED)
2802 static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di)
2804 struct ab8500_charger *di = _di;
2806 dev_dbg(di->dev, "Not allowed USB charger detected\n");
2807 queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0);
2813 * ab8500_charger_chwdexp_handler() - Charger watchdog expired
2814 * @irq: interrupt number
2815 * @_di: pointer to the ab8500_charger structure
2817 * Returns IRQ status(IRQ_HANDLED)
2819 static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di)
2821 struct ab8500_charger *di = _di;
2823 dev_dbg(di->dev, "Charger watchdog expired\n");
2826 * The charger that was online when the watchdog expired
2827 * needs to be restarted for charging to start again
2829 if (di->ac.charger_online) {
2830 di->ac.wd_expired = true;
2831 ab8500_power_supply_changed(di, di->ac_chg.psy);
2833 if (di->usb.charger_online) {
2834 di->usb.wd_expired = true;
2835 ab8500_power_supply_changed(di, di->usb_chg.psy);
2842 * ab8500_charger_vbuschdropend_handler() - VBUS drop removed
2843 * @irq: interrupt number
2844 * @_di: pointer to the ab8500_charger structure
2846 * Returns IRQ status(IRQ_HANDLED)
2848 static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di)
2850 struct ab8500_charger *di = _di;
2852 dev_dbg(di->dev, "VBUS charger drop ended\n");
2853 di->flags.vbus_drop_end = true;
2856 * VBUS might have dropped due to bad connection.
2857 * Schedule a new input limit set to the value SW requests.
2859 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work,
2860 round_jiffies(VBUS_IN_CURR_LIM_RETRY_SET_TIME * HZ));
2866 * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected
2867 * @irq: interrupt number
2868 * @_di: pointer to the ab8500_charger structure
2870 * Returns IRQ status(IRQ_HANDLED)
2872 static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di)
2874 struct ab8500_charger *di = _di;
2876 dev_dbg(di->dev, "VBUS overvoltage detected\n");
2877 di->flags.vbus_ovv = true;
2878 ab8500_power_supply_changed(di, di->usb_chg.psy);
2880 /* Schedule a new HW failure check */
2881 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2887 * ab8500_charger_ac_get_property() - get the ac/mains properties
2888 * @psy: pointer to the power_supply structure
2889 * @psp: pointer to the power_supply_property structure
2890 * @val: pointer to the power_supply_propval union
2892 * This function gets called when an application tries to get the ac/mains
2893 * properties by reading the sysfs files.
2894 * AC/Mains properties are online, present and voltage.
2895 * online: ac/mains charging is in progress or not
2896 * present: presence of the ac/mains
2897 * voltage: AC/Mains voltage
2898 * Returns error code in case of failure else 0(on success)
2900 static int ab8500_charger_ac_get_property(struct power_supply *psy,
2901 enum power_supply_property psp,
2902 union power_supply_propval *val)
2904 struct ab8500_charger *di;
2907 di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy));
2910 case POWER_SUPPLY_PROP_HEALTH:
2911 if (di->flags.mainextchnotok)
2912 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2913 else if (di->ac.wd_expired || di->usb.wd_expired)
2914 val->intval = POWER_SUPPLY_HEALTH_DEAD;
2915 else if (di->flags.main_thermal_prot)
2916 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2918 val->intval = POWER_SUPPLY_HEALTH_GOOD;
2920 case POWER_SUPPLY_PROP_ONLINE:
2921 val->intval = di->ac.charger_online;
2923 case POWER_SUPPLY_PROP_PRESENT:
2924 val->intval = di->ac.charger_connected;
2926 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2927 ret = ab8500_charger_get_ac_voltage(di);
2929 di->ac.charger_voltage = ret;
2930 /* On error, use previous value */
2931 val->intval = di->ac.charger_voltage * 1000;
2933 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2935 * This property is used to indicate when CV mode is entered
2936 * for the AC charger
2938 di->ac.cv_active = ab8500_charger_ac_cv(di);
2939 val->intval = di->ac.cv_active;
2941 case POWER_SUPPLY_PROP_CURRENT_NOW:
2942 ret = ab8500_charger_get_ac_current(di);
2944 di->ac.charger_current = ret;
2945 val->intval = di->ac.charger_current * 1000;
2954 * ab8500_charger_usb_get_property() - get the usb properties
2955 * @psy: pointer to the power_supply structure
2956 * @psp: pointer to the power_supply_property structure
2957 * @val: pointer to the power_supply_propval union
2959 * This function gets called when an application tries to get the usb
2960 * properties by reading the sysfs files.
2961 * USB properties are online, present and voltage.
2962 * online: usb charging is in progress or not
2963 * present: presence of the usb
2964 * voltage: vbus voltage
2965 * Returns error code in case of failure else 0(on success)
2967 static int ab8500_charger_usb_get_property(struct power_supply *psy,
2968 enum power_supply_property psp,
2969 union power_supply_propval *val)
2971 struct ab8500_charger *di;
2974 di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy));
2977 case POWER_SUPPLY_PROP_HEALTH:
2978 if (di->flags.usbchargernotok)
2979 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2980 else if (di->ac.wd_expired || di->usb.wd_expired)
2981 val->intval = POWER_SUPPLY_HEALTH_DEAD;
2982 else if (di->flags.usb_thermal_prot)
2983 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2984 else if (di->flags.vbus_ovv)
2985 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
2987 val->intval = POWER_SUPPLY_HEALTH_GOOD;
2989 case POWER_SUPPLY_PROP_ONLINE:
2990 val->intval = di->usb.charger_online;
2992 case POWER_SUPPLY_PROP_PRESENT:
2993 val->intval = di->usb.charger_connected;
2995 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2996 ret = ab8500_charger_get_vbus_voltage(di);
2998 di->usb.charger_voltage = ret;
2999 val->intval = di->usb.charger_voltage * 1000;
3001 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
3003 * This property is used to indicate when CV mode is entered
3004 * for the USB charger
3006 di->usb.cv_active = ab8500_charger_usb_cv(di);
3007 val->intval = di->usb.cv_active;
3009 case POWER_SUPPLY_PROP_CURRENT_NOW:
3010 ret = ab8500_charger_get_usb_current(di);
3012 di->usb.charger_current = ret;
3013 val->intval = di->usb.charger_current * 1000;
3015 case POWER_SUPPLY_PROP_CURRENT_AVG:
3017 * This property is used to indicate when VBUS has collapsed
3018 * due to too high output current from the USB charger
3020 if (di->flags.vbus_collapse)
3032 * ab8500_charger_init_hw_registers() - Set up charger related registers
3033 * @di: pointer to the ab8500_charger structure
3035 * Set up charger OVV, watchdog and maximum voltage registers as well as
3036 * charging of the backup battery
3038 static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
3042 /* Setup maximum charger current and voltage for ABB cut2.0 */
3043 if (!is_ab8500_1p1_or_earlier(di->parent)) {
3044 ret = abx500_set_register_interruptible(di->dev,
3046 AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6);
3049 "failed to set CH_VOLT_LVL_MAX_REG\n");
3053 ret = abx500_set_register_interruptible(di->dev,
3054 AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
3058 "failed to set CH_OPT_CRNTLVL_MAX_REG\n");
3063 if (is_ab8505_2p0(di->parent))
3064 ret = abx500_mask_and_set_register_interruptible(di->dev,
3066 AB8500_USBCH_CTRL2_REG,
3067 VBUS_AUTO_IN_CURR_LIM_ENA,
3068 VBUS_AUTO_IN_CURR_LIM_ENA);
3071 * VBUS OVV set to 6.3V and enable automatic current limitation
3073 ret = abx500_set_register_interruptible(di->dev,
3075 AB8500_USBCH_CTRL2_REG,
3076 VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA);
3079 "failed to set automatic current limitation\n");
3083 /* Enable main watchdog in OTP */
3084 ret = abx500_set_register_interruptible(di->dev,
3085 AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD);
3087 dev_err(di->dev, "failed to enable main WD in OTP\n");
3091 /* Enable main watchdog */
3092 ret = abx500_set_register_interruptible(di->dev,
3093 AB8500_SYS_CTRL2_BLOCK,
3094 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA);
3096 dev_err(di->dev, "failed to enable main watchdog\n");
3101 * Due to internal synchronisation, Enable and Kick watchdog bits
3102 * cannot be enabled in a single write.
3103 * A minimum delay of 2*32 kHz period (62.5µs) must be inserted
3104 * between writing Enable then Kick bits.
3108 /* Kick main watchdog */
3109 ret = abx500_set_register_interruptible(di->dev,
3110 AB8500_SYS_CTRL2_BLOCK,
3111 AB8500_MAIN_WDOG_CTRL_REG,
3112 (MAIN_WDOG_ENA | MAIN_WDOG_KICK));
3114 dev_err(di->dev, "failed to kick main watchdog\n");
3118 /* Disable main watchdog */
3119 ret = abx500_set_register_interruptible(di->dev,
3120 AB8500_SYS_CTRL2_BLOCK,
3121 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS);
3123 dev_err(di->dev, "failed to disable main watchdog\n");
3127 /* Set watchdog timeout */
3128 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3129 AB8500_CH_WD_TIMER_REG, WD_TIMER);
3131 dev_err(di->dev, "failed to set charger watchdog timeout\n");
3135 ret = ab8500_charger_led_en(di, false);
3137 dev_err(di->dev, "failed to disable LED\n");
3141 ret = abx500_set_register_interruptible(di->dev,
3143 AB8500_RTC_BACKUP_CHG_REG,
3144 (di->bm->bkup_bat_v & 0x3) | di->bm->bkup_bat_i);
3146 dev_err(di->dev, "failed to setup backup battery charging\n");
3150 /* Enable backup battery charging */
3151 ret = abx500_mask_and_set_register_interruptible(di->dev,
3152 AB8500_RTC, AB8500_RTC_CTRL_REG,
3153 RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
3155 dev_err(di->dev, "%s mask and set failed\n", __func__);
3164 * ab8500 charger driver interrupts and their respective isr
3166 static struct ab8500_charger_interrupts ab8500_charger_irq[] = {
3167 {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler},
3168 {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler},
3169 {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler},
3170 {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler},
3171 {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler},
3172 {"VBUS_DET_F", ab8500_charger_vbusdetf_handler},
3173 {"VBUS_DET_R", ab8500_charger_vbusdetr_handler},
3174 {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler},
3175 {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler},
3176 {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler},
3177 {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler},
3178 {"VBUS_OVV", ab8500_charger_vbusovv_handler},
3179 {"CH_WD_EXP", ab8500_charger_chwdexp_handler},
3180 {"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler},
3183 static int ab8500_charger_usb_notifier_call(struct notifier_block *nb,
3184 unsigned long event, void *power)
3186 struct ab8500_charger *di =
3187 container_of(nb, struct ab8500_charger, nb);
3188 enum ab8500_usb_state bm_usb_state;
3189 unsigned mA = *((unsigned *)power);
3191 if (event != USB_EVENT_VBUS) {
3192 dev_dbg(di->dev, "not a standard host, returning\n");
3196 /* TODO: State is fabricate here. See if charger really needs USB
3197 * state or if mA is enough
3199 if ((di->usb_state.usb_current == 2) && (mA > 2))
3200 bm_usb_state = AB8500_BM_USB_STATE_RESUME;
3202 bm_usb_state = AB8500_BM_USB_STATE_RESET_HS;
3204 bm_usb_state = AB8500_BM_USB_STATE_SUSPEND;
3205 else if (mA >= 8) /* 8, 100, 500 */
3206 bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED;
3207 else /* Should never occur */
3208 bm_usb_state = AB8500_BM_USB_STATE_RESET_FS;
3210 dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n",
3211 __func__, bm_usb_state, mA);
3213 spin_lock(&di->usb_state.usb_lock);
3214 di->usb_state.state_tmp = bm_usb_state;
3215 di->usb_state.usb_current_tmp = mA;
3216 spin_unlock(&di->usb_state.usb_lock);
3219 * wait for some time until you get updates from the usb stack
3220 * and negotiations are completed
3222 queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2);
3227 static int __maybe_unused ab8500_charger_resume(struct device *dev)
3230 struct ab8500_charger *di = dev_get_drvdata(dev);
3233 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3234 * logic. That means we have to continuously kick the charger
3235 * watchdog even when no charger is connected. This is only
3236 * valid once the AC charger has been enabled. This is
3237 * a bug that is not handled by the algorithm and the
3238 * watchdog have to be kicked by the charger driver
3239 * when the AC charger is disabled
3241 if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) {
3242 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3243 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
3245 dev_err(di->dev, "Failed to kick WD!\n");
3247 /* If not already pending start a new timer */
3248 queue_delayed_work(di->charger_wq, &di->kick_wd_work,
3249 round_jiffies(WD_KICK_INTERVAL));
3252 /* If we still have a HW failure, schedule a new check */
3253 if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
3254 queue_delayed_work(di->charger_wq,
3255 &di->check_hw_failure_work, 0);
3258 if (di->flags.vbus_drop_end)
3259 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0);
3264 static int __maybe_unused ab8500_charger_suspend(struct device *dev)
3266 struct ab8500_charger *di = dev_get_drvdata(dev);
3268 /* Cancel any pending jobs */
3269 cancel_delayed_work(&di->check_hw_failure_work);
3270 cancel_delayed_work(&di->vbus_drop_end_work);
3272 flush_delayed_work(&di->attach_work);
3273 flush_delayed_work(&di->usb_charger_attached_work);
3274 flush_delayed_work(&di->ac_charger_attached_work);
3275 flush_delayed_work(&di->check_usbchgnotok_work);
3276 flush_delayed_work(&di->check_vbat_work);
3277 flush_delayed_work(&di->kick_wd_work);
3279 flush_work(&di->usb_link_status_work);
3280 flush_work(&di->ac_work);
3281 flush_work(&di->detect_usb_type_work);
3283 if (atomic_read(&di->current_stepping_sessions))
3289 static struct notifier_block charger_nb = {
3290 .notifier_call = ab8500_external_charger_prepare,
3293 static char *supply_interface[] = {
3299 static const struct power_supply_desc ab8500_ac_chg_desc = {
3300 .name = "ab8500_ac",
3301 .type = POWER_SUPPLY_TYPE_MAINS,
3302 .properties = ab8500_charger_ac_props,
3303 .num_properties = ARRAY_SIZE(ab8500_charger_ac_props),
3304 .get_property = ab8500_charger_ac_get_property,
3307 static const struct power_supply_desc ab8500_usb_chg_desc = {
3308 .name = "ab8500_usb",
3309 .type = POWER_SUPPLY_TYPE_USB,
3310 .properties = ab8500_charger_usb_props,
3311 .num_properties = ARRAY_SIZE(ab8500_charger_usb_props),
3312 .get_property = ab8500_charger_usb_get_property,
3315 static int ab8500_charger_bind(struct device *dev)
3317 struct ab8500_charger *di = dev_get_drvdata(dev);
3321 /* Create a work queue for the charger */
3322 di->charger_wq = alloc_ordered_workqueue("ab8500_charger_wq",
3324 if (di->charger_wq == NULL) {
3325 dev_err(dev, "failed to create work queue\n");
3329 ch_stat = ab8500_charger_detect_chargers(di, false);
3331 if (ch_stat & AC_PW_CONN) {
3332 if (is_ab8500(di->parent))
3333 queue_delayed_work(di->charger_wq,
3334 &di->ac_charger_attached_work,
3337 if (ch_stat & USB_PW_CONN) {
3338 if (is_ab8500(di->parent))
3339 queue_delayed_work(di->charger_wq,
3340 &di->usb_charger_attached_work,
3342 di->vbus_detected = true;
3343 di->vbus_detected_start = true;
3344 queue_work(di->charger_wq,
3345 &di->detect_usb_type_work);
3348 ret = component_bind_all(dev, di);
3350 dev_err(dev, "can't bind component devices\n");
3357 static void ab8500_charger_unbind(struct device *dev)
3359 struct ab8500_charger *di = dev_get_drvdata(dev);
3362 /* Disable AC charging */
3363 ab8500_charger_ac_en(&di->ac_chg, false, 0, 0);
3365 /* Disable USB charging */
3366 ab8500_charger_usb_en(&di->usb_chg, false, 0, 0);
3368 /* Backup battery voltage and current disable */
3369 ret = abx500_mask_and_set_register_interruptible(di->dev,
3370 AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0);
3372 dev_err(di->dev, "%s mask and set failed\n", __func__);
3374 /* Delete the work queue */
3375 destroy_workqueue(di->charger_wq);
3377 flush_scheduled_work();
3379 /* Unbind fg, btemp, algorithm */
3380 component_unbind_all(dev, di);
3383 static const struct component_master_ops ab8500_charger_comp_ops = {
3384 .bind = ab8500_charger_bind,
3385 .unbind = ab8500_charger_unbind,
3388 static struct platform_driver *const ab8500_charger_component_drivers[] = {
3390 &ab8500_btemp_driver,
3391 &ab8500_chargalg_driver,
3394 static int ab8500_charger_compare_dev(struct device *dev, void *data)
3399 static int ab8500_charger_probe(struct platform_device *pdev)
3401 struct device *dev = &pdev->dev;
3402 struct device_node *np = dev->of_node;
3403 struct component_match *match = NULL;
3404 struct power_supply_config ac_psy_cfg = {}, usb_psy_cfg = {};
3405 struct ab8500_charger *di;
3410 di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
3414 di->bm = &ab8500_bm_data;
3416 ret = ab8500_bm_of_probe(dev, np, di->bm);
3418 dev_err(dev, "failed to get battery information\n");
3421 di->autopower_cfg = of_property_read_bool(np, "autopower_cfg");
3423 /* get parent data */
3425 di->parent = dev_get_drvdata(pdev->dev.parent);
3427 /* Get ADC channels */
3428 di->adc_main_charger_v = devm_iio_channel_get(dev, "main_charger_v");
3429 if (IS_ERR(di->adc_main_charger_v)) {
3430 ret = dev_err_probe(dev, PTR_ERR(di->adc_main_charger_v),
3431 "failed to get ADC main charger voltage\n");
3434 di->adc_main_charger_c = devm_iio_channel_get(dev, "main_charger_c");
3435 if (IS_ERR(di->adc_main_charger_c)) {
3436 ret = dev_err_probe(dev, PTR_ERR(di->adc_main_charger_c),
3437 "failed to get ADC main charger current\n");
3440 di->adc_vbus_v = devm_iio_channel_get(dev, "vbus_v");
3441 if (IS_ERR(di->adc_vbus_v)) {
3442 ret = dev_err_probe(dev, PTR_ERR(di->adc_vbus_v),
3443 "failed to get ADC USB charger voltage\n");
3446 di->adc_usb_charger_c = devm_iio_channel_get(dev, "usb_charger_c");
3447 if (IS_ERR(di->adc_usb_charger_c)) {
3448 ret = dev_err_probe(dev, PTR_ERR(di->adc_usb_charger_c),
3449 "failed to get ADC USB charger current\n");
3454 * VDD ADC supply needs to be enabled from this driver when there
3455 * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
3456 * interrupts during charging
3458 di->regu = devm_regulator_get(dev, "vddadc");
3459 if (IS_ERR(di->regu)) {
3460 ret = PTR_ERR(di->regu);
3461 dev_err(dev, "failed to get vddadc regulator\n");
3465 /* Request interrupts */
3466 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
3467 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3471 ret = devm_request_threaded_irq(dev,
3472 irq, NULL, ab8500_charger_irq[i].isr,
3473 IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT,
3474 ab8500_charger_irq[i].name, di);
3477 dev_err(dev, "failed to request %s IRQ %d: %d\n"
3478 , ab8500_charger_irq[i].name, irq, ret);
3481 dev_dbg(dev, "Requested %s IRQ %d: %d\n",
3482 ab8500_charger_irq[i].name, irq, ret);
3485 /* initialize lock */
3486 spin_lock_init(&di->usb_state.usb_lock);
3487 mutex_init(&di->usb_ipt_crnt_lock);
3489 di->autopower = false;
3490 di->invalid_charger_detect_state = 0;
3492 /* AC and USB supply config */
3493 ac_psy_cfg.supplied_to = supply_interface;
3494 ac_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
3495 ac_psy_cfg.drv_data = &di->ac_chg;
3496 usb_psy_cfg.supplied_to = supply_interface;
3497 usb_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
3498 usb_psy_cfg.drv_data = &di->usb_chg;
3501 /* ux500_charger sub-class */
3502 di->ac_chg.ops.enable = &ab8500_charger_ac_en;
3503 di->ac_chg.ops.check_enable = &ab8500_charger_ac_check_enable;
3504 di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3505 di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3506 di->ac_chg.max_out_volt = ab8500_charger_voltage_map[
3507 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3508 di->ac_chg.max_out_curr =
3509 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3510 di->ac_chg.wdt_refresh = CHG_WD_INTERVAL;
3512 * The AB8505 only supports USB charging. If we are not the
3513 * AB8505, register an AC charger.
3515 * TODO: if this should be opt-in, add DT properties for this.
3517 if (!is_ab8505(di->parent))
3518 di->ac_chg.enabled = true;
3519 di->ac_chg.external = false;
3522 /* ux500_charger sub-class */
3523 di->usb_chg.ops.enable = &ab8500_charger_usb_en;
3524 di->usb_chg.ops.check_enable = &ab8500_charger_usb_check_enable;
3525 di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3526 di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3527 di->usb_chg.max_out_volt = ab8500_charger_voltage_map[
3528 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3529 di->usb_chg.max_out_curr =
3530 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3531 di->usb_chg.wdt_refresh = CHG_WD_INTERVAL;
3532 di->usb_chg.external = false;
3533 di->usb_state.usb_current = -1;
3535 mutex_init(&di->charger_attached_mutex);
3537 /* Init work for HW failure check */
3538 INIT_DEFERRABLE_WORK(&di->check_hw_failure_work,
3539 ab8500_charger_check_hw_failure_work);
3540 INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work,
3541 ab8500_charger_check_usbchargernotok_work);
3543 INIT_DELAYED_WORK(&di->ac_charger_attached_work,
3544 ab8500_charger_ac_attached_work);
3545 INIT_DELAYED_WORK(&di->usb_charger_attached_work,
3546 ab8500_charger_usb_attached_work);
3549 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3550 * logic. That means we have to continuously kick the charger
3551 * watchdog even when no charger is connected. This is only
3552 * valid once the AC charger has been enabled. This is
3553 * a bug that is not handled by the algorithm and the
3554 * watchdog have to be kicked by the charger driver
3555 * when the AC charger is disabled
3557 INIT_DEFERRABLE_WORK(&di->kick_wd_work,
3558 ab8500_charger_kick_watchdog_work);
3560 INIT_DEFERRABLE_WORK(&di->check_vbat_work,
3561 ab8500_charger_check_vbat_work);
3563 INIT_DELAYED_WORK(&di->attach_work,
3564 ab8500_charger_usb_link_attach_work);
3566 INIT_DELAYED_WORK(&di->usb_state_changed_work,
3567 ab8500_charger_usb_state_changed_work);
3569 INIT_DELAYED_WORK(&di->vbus_drop_end_work,
3570 ab8500_charger_vbus_drop_end_work);
3572 /* Init work for charger detection */
3573 INIT_WORK(&di->usb_link_status_work,
3574 ab8500_charger_usb_link_status_work);
3575 INIT_WORK(&di->ac_work, ab8500_charger_ac_work);
3576 INIT_WORK(&di->detect_usb_type_work,
3577 ab8500_charger_detect_usb_type_work);
3579 /* Init work for checking HW status */
3580 INIT_WORK(&di->check_main_thermal_prot_work,
3581 ab8500_charger_check_main_thermal_prot_work);
3582 INIT_WORK(&di->check_usb_thermal_prot_work,
3583 ab8500_charger_check_usb_thermal_prot_work);
3586 /* Initialize OVV, and other registers */
3587 ret = ab8500_charger_init_hw_registers(di);
3589 dev_err(dev, "failed to initialize ABB registers\n");
3593 /* Register AC charger class */
3594 if (di->ac_chg.enabled) {
3595 di->ac_chg.psy = devm_power_supply_register(dev,
3596 &ab8500_ac_chg_desc,
3598 if (IS_ERR(di->ac_chg.psy)) {
3599 dev_err(dev, "failed to register AC charger\n");
3600 return PTR_ERR(di->ac_chg.psy);
3604 /* Register USB charger class */
3605 di->usb_chg.psy = devm_power_supply_register(dev,
3606 &ab8500_usb_chg_desc,
3608 if (IS_ERR(di->usb_chg.psy)) {
3609 dev_err(dev, "failed to register USB charger\n");
3610 return PTR_ERR(di->usb_chg.psy);
3613 /* Identify the connected charger types during startup */
3614 charger_status = ab8500_charger_detect_chargers(di, true);
3615 if (charger_status & AC_PW_CONN) {
3616 di->ac.charger_connected = 1;
3618 ab8500_power_supply_changed(di, di->ac_chg.psy);
3619 sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
3622 platform_set_drvdata(pdev, di);
3624 /* Create something that will match the subdrivers when we bind */
3625 for (i = 0; i < ARRAY_SIZE(ab8500_charger_component_drivers); i++) {
3626 struct device_driver *drv = &ab8500_charger_component_drivers[i]->driver;
3627 struct device *p = NULL, *d;
3629 while ((d = platform_find_device_by_driver(p, drv))) {
3631 component_match_add(dev, &match,
3632 ab8500_charger_compare_dev, d);
3638 dev_err(dev, "no matching components\n");
3641 if (IS_ERR(match)) {
3642 dev_err(dev, "could not create component match\n");
3643 return PTR_ERR(match);
3646 /* Notifier for external charger enabling */
3647 if (!di->ac_chg.enabled)
3648 blocking_notifier_chain_register(
3649 &charger_notifier_list, &charger_nb);
3652 di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
3653 if (IS_ERR_OR_NULL(di->usb_phy)) {
3654 dev_err(dev, "failed to get usb transceiver\n");
3656 goto out_charger_notifier;
3658 di->nb.notifier_call = ab8500_charger_usb_notifier_call;
3659 ret = usb_register_notifier(di->usb_phy, &di->nb);
3661 dev_err(dev, "failed to register usb notifier\n");
3666 ret = component_master_add_with_match(&pdev->dev,
3667 &ab8500_charger_comp_ops,
3670 dev_err(dev, "failed to add component master\n");
3677 usb_unregister_notifier(di->usb_phy, &di->nb);
3679 usb_put_phy(di->usb_phy);
3680 out_charger_notifier:
3681 if (!di->ac_chg.enabled)
3682 blocking_notifier_chain_unregister(
3683 &charger_notifier_list, &charger_nb);
3687 static int ab8500_charger_remove(struct platform_device *pdev)
3689 struct ab8500_charger *di = platform_get_drvdata(pdev);
3691 component_master_del(&pdev->dev, &ab8500_charger_comp_ops);
3693 usb_unregister_notifier(di->usb_phy, &di->nb);
3694 usb_put_phy(di->usb_phy);
3695 if (!di->ac_chg.enabled)
3696 blocking_notifier_chain_unregister(
3697 &charger_notifier_list, &charger_nb);
3702 static SIMPLE_DEV_PM_OPS(ab8500_charger_pm_ops, ab8500_charger_suspend, ab8500_charger_resume);
3704 static const struct of_device_id ab8500_charger_match[] = {
3705 { .compatible = "stericsson,ab8500-charger", },
3708 MODULE_DEVICE_TABLE(of, ab8500_charger_match);
3710 static struct platform_driver ab8500_charger_driver = {
3711 .probe = ab8500_charger_probe,
3712 .remove = ab8500_charger_remove,
3714 .name = "ab8500-charger",
3715 .of_match_table = ab8500_charger_match,
3716 .pm = &ab8500_charger_pm_ops,
3720 static int __init ab8500_charger_init(void)
3724 ret = platform_register_drivers(ab8500_charger_component_drivers,
3725 ARRAY_SIZE(ab8500_charger_component_drivers));
3729 return platform_driver_register(&ab8500_charger_driver);
3732 static void __exit ab8500_charger_exit(void)
3734 platform_unregister_drivers(ab8500_charger_component_drivers,
3735 ARRAY_SIZE(ab8500_charger_component_drivers));
3736 platform_driver_unregister(&ab8500_charger_driver);
3739 module_init(ab8500_charger_init);
3740 module_exit(ab8500_charger_exit);
3742 MODULE_LICENSE("GPL v2");
3743 MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
3744 MODULE_ALIAS("platform:ab8500-charger");
3745 MODULE_DESCRIPTION("AB8500 charger management driver");