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0376148f | 1 | // SPDX-License-Identifier: GPL-2.0-only |
84edbeea AM |
2 | /* |
3 | * Copyright (C) ST-Ericsson SA 2012 | |
4 | * | |
5 | * Charger driver for AB8500 | |
6 | * | |
84edbeea AM |
7 | * Author: |
8 | * Johan Palsson <johan.palsson@stericsson.com> | |
9 | * Karl Komierowski <karl.komierowski@stericsson.com> | |
10 | * Arun R Murthy <arun.murthy@stericsson.com> | |
11 | */ | |
12 | ||
13 | #include <linux/init.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/delay.h> | |
8891716e | 18 | #include <linux/notifier.h> |
84edbeea AM |
19 | #include <linux/slab.h> |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/power_supply.h> | |
22 | #include <linux/completion.h> | |
23 | #include <linux/regulator/consumer.h> | |
24 | #include <linux/err.h> | |
25 | #include <linux/workqueue.h> | |
26 | #include <linux/kobject.h> | |
4aef72db R |
27 | #include <linux/of.h> |
28 | #include <linux/mfd/core.h> | |
84edbeea AM |
29 | #include <linux/mfd/abx500/ab8500.h> |
30 | #include <linux/mfd/abx500.h> | |
31 | #include <linux/mfd/abx500/ab8500-bm.h> | |
32 | #include <linux/mfd/abx500/ab8500-gpadc.h> | |
33 | #include <linux/mfd/abx500/ux500_chargalg.h> | |
34 | #include <linux/usb/otg.h> | |
b269fff4 | 35 | #include <linux/mutex.h> |
84edbeea AM |
36 | |
37 | /* Charger constants */ | |
38 | #define NO_PW_CONN 0 | |
39 | #define AC_PW_CONN 1 | |
40 | #define USB_PW_CONN 2 | |
41 | ||
42 | #define MAIN_WDOG_ENA 0x01 | |
43 | #define MAIN_WDOG_KICK 0x02 | |
44 | #define MAIN_WDOG_DIS 0x00 | |
45 | #define CHARG_WD_KICK 0x01 | |
46 | #define MAIN_CH_ENA 0x01 | |
47 | #define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02 | |
48 | #define USB_CH_ENA 0x01 | |
49 | #define USB_CHG_NO_OVERSHOOT_ENA_N 0x02 | |
50 | #define MAIN_CH_DET 0x01 | |
51 | #define MAIN_CH_CV_ON 0x04 | |
52 | #define USB_CH_CV_ON 0x08 | |
53 | #define VBUS_DET_DBNC100 0x02 | |
54 | #define VBUS_DET_DBNC1 0x01 | |
55 | #define OTP_ENABLE_WD 0x01 | |
4dcdf577 | 56 | #define DROP_COUNT_RESET 0x01 |
b3ea5f45 | 57 | #define USB_CH_DET 0x01 |
84edbeea AM |
58 | |
59 | #define MAIN_CH_INPUT_CURR_SHIFT 4 | |
60 | #define VBUS_IN_CURR_LIM_SHIFT 4 | |
34c11a70 | 61 | #define AUTO_VBUS_IN_CURR_LIM_SHIFT 4 |
f7470b5d | 62 | #define VBUS_IN_CURR_LIM_RETRY_SET_TIME 30 /* seconds */ |
84edbeea AM |
63 | |
64 | #define LED_INDICATOR_PWM_ENA 0x01 | |
65 | #define LED_INDICATOR_PWM_DIS 0x00 | |
66 | #define LED_IND_CUR_5MA 0x04 | |
67 | #define LED_INDICATOR_PWM_DUTY_252_256 0xBF | |
68 | ||
69 | /* HW failure constants */ | |
70 | #define MAIN_CH_TH_PROT 0x02 | |
71 | #define VBUS_CH_NOK 0x08 | |
72 | #define USB_CH_TH_PROT 0x02 | |
73 | #define VBUS_OVV_TH 0x01 | |
74 | #define MAIN_CH_NOK 0x01 | |
75 | #define VBUS_DET 0x80 | |
76 | ||
b269fff4 LJ |
77 | #define MAIN_CH_STATUS2_MAINCHGDROP 0x80 |
78 | #define MAIN_CH_STATUS2_MAINCHARGERDETDBNC 0x40 | |
79 | #define USB_CH_VBUSDROP 0x40 | |
80 | #define USB_CH_VBUSDETDBNC 0x01 | |
81 | ||
84edbeea AM |
82 | /* UsbLineStatus register bit masks */ |
83 | #define AB8500_USB_LINK_STATUS 0x78 | |
d4337660 | 84 | #define AB8505_USB_LINK_STATUS 0xF8 |
84edbeea | 85 | #define AB8500_STD_HOST_SUSP 0x18 |
861a30da | 86 | #define USB_LINK_STATUS_SHIFT 3 |
84edbeea AM |
87 | |
88 | /* Watchdog timeout constant */ | |
89 | #define WD_TIMER 0x30 /* 4min */ | |
90 | #define WD_KICK_INTERVAL (60 * HZ) | |
91 | ||
92 | /* Lowest charger voltage is 3.39V -> 0x4E */ | |
93 | #define LOW_VOLT_REG 0x4E | |
94 | ||
f8e96dff JB |
95 | /* Step up/down delay in us */ |
96 | #define STEP_UDELAY 1000 | |
97 | ||
b269fff4 LJ |
98 | #define CHARGER_STATUS_POLL 10 /* in ms */ |
99 | ||
e07a5645 LP |
100 | #define CHG_WD_INTERVAL (60 * HZ) |
101 | ||
b0163222 | 102 | #define AB8500_SW_CONTROL_FALLBACK 0x03 |
34c11a70 POH |
103 | /* Wait for enumeration before charing in us */ |
104 | #define WAIT_ACA_RID_ENUMERATION (5 * 1000) | |
8891716e LJ |
105 | /*External charger control*/ |
106 | #define AB8500_SYS_CHARGER_CONTROL_REG 0x52 | |
107 | #define EXTERNAL_CHARGER_DISABLE_REG_VAL 0x03 | |
108 | #define EXTERNAL_CHARGER_ENABLE_REG_VAL 0x07 | |
b0163222 | 109 | |
84edbeea AM |
110 | /* UsbLineStatus register - usb types */ |
111 | enum ab8500_charger_link_status { | |
112 | USB_STAT_NOT_CONFIGURED, | |
113 | USB_STAT_STD_HOST_NC, | |
114 | USB_STAT_STD_HOST_C_NS, | |
115 | USB_STAT_STD_HOST_C_S, | |
116 | USB_STAT_HOST_CHG_NM, | |
117 | USB_STAT_HOST_CHG_HS, | |
118 | USB_STAT_HOST_CHG_HS_CHIRP, | |
119 | USB_STAT_DEDICATED_CHG, | |
120 | USB_STAT_ACA_RID_A, | |
121 | USB_STAT_ACA_RID_B, | |
122 | USB_STAT_ACA_RID_C_NM, | |
123 | USB_STAT_ACA_RID_C_HS, | |
124 | USB_STAT_ACA_RID_C_HS_CHIRP, | |
125 | USB_STAT_HM_IDGND, | |
126 | USB_STAT_RESERVED, | |
127 | USB_STAT_NOT_VALID_LINK, | |
74a8e349 HB |
128 | USB_STAT_PHY_EN, |
129 | USB_STAT_SUP_NO_IDGND_VBUS, | |
130 | USB_STAT_SUP_IDGND_VBUS, | |
131 | USB_STAT_CHARGER_LINE_1, | |
132 | USB_STAT_CARKIT_1, | |
133 | USB_STAT_CARKIT_2, | |
134 | USB_STAT_ACA_DOCK_CHARGER, | |
84edbeea AM |
135 | }; |
136 | ||
137 | enum ab8500_usb_state { | |
138 | AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */ | |
139 | AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */ | |
140 | AB8500_BM_USB_STATE_CONFIGURED, | |
141 | AB8500_BM_USB_STATE_SUSPEND, | |
142 | AB8500_BM_USB_STATE_RESUME, | |
143 | AB8500_BM_USB_STATE_MAX, | |
144 | }; | |
145 | ||
146 | /* VBUS input current limits supported in AB8500 in mA */ | |
147 | #define USB_CH_IP_CUR_LVL_0P05 50 | |
148 | #define USB_CH_IP_CUR_LVL_0P09 98 | |
149 | #define USB_CH_IP_CUR_LVL_0P19 193 | |
150 | #define USB_CH_IP_CUR_LVL_0P29 290 | |
151 | #define USB_CH_IP_CUR_LVL_0P38 380 | |
152 | #define USB_CH_IP_CUR_LVL_0P45 450 | |
153 | #define USB_CH_IP_CUR_LVL_0P5 500 | |
154 | #define USB_CH_IP_CUR_LVL_0P6 600 | |
155 | #define USB_CH_IP_CUR_LVL_0P7 700 | |
156 | #define USB_CH_IP_CUR_LVL_0P8 800 | |
157 | #define USB_CH_IP_CUR_LVL_0P9 900 | |
158 | #define USB_CH_IP_CUR_LVL_1P0 1000 | |
159 | #define USB_CH_IP_CUR_LVL_1P1 1100 | |
160 | #define USB_CH_IP_CUR_LVL_1P3 1300 | |
161 | #define USB_CH_IP_CUR_LVL_1P4 1400 | |
162 | #define USB_CH_IP_CUR_LVL_1P5 1500 | |
163 | ||
164 | #define VBAT_TRESH_IP_CUR_RED 3800 | |
165 | ||
166 | #define to_ab8500_charger_usb_device_info(x) container_of((x), \ | |
167 | struct ab8500_charger, usb_chg) | |
168 | #define to_ab8500_charger_ac_device_info(x) container_of((x), \ | |
169 | struct ab8500_charger, ac_chg) | |
170 | ||
171 | /** | |
172 | * struct ab8500_charger_interrupts - ab8500 interupts | |
173 | * @name: name of the interrupt | |
174 | * @isr function pointer to the isr | |
175 | */ | |
176 | struct ab8500_charger_interrupts { | |
177 | char *name; | |
178 | irqreturn_t (*isr)(int irq, void *data); | |
179 | }; | |
180 | ||
181 | struct ab8500_charger_info { | |
182 | int charger_connected; | |
183 | int charger_online; | |
184 | int charger_voltage; | |
185 | int cv_active; | |
186 | bool wd_expired; | |
a864c5a8 | 187 | int charger_current; |
84edbeea AM |
188 | }; |
189 | ||
190 | struct ab8500_charger_event_flags { | |
191 | bool mainextchnotok; | |
192 | bool main_thermal_prot; | |
193 | bool usb_thermal_prot; | |
194 | bool vbus_ovv; | |
195 | bool usbchargernotok; | |
196 | bool chgwdexp; | |
197 | bool vbus_collapse; | |
34c11a70 | 198 | bool vbus_drop_end; |
84edbeea AM |
199 | }; |
200 | ||
201 | struct ab8500_charger_usb_state { | |
84edbeea | 202 | int usb_current; |
34c11a70 | 203 | int usb_current_tmp; |
84edbeea | 204 | enum ab8500_usb_state state; |
34c11a70 | 205 | enum ab8500_usb_state state_tmp; |
84edbeea AM |
206 | spinlock_t usb_lock; |
207 | }; | |
208 | ||
f7470b5d LJ |
209 | struct ab8500_charger_max_usb_in_curr { |
210 | int usb_type_max; | |
211 | int set_max; | |
212 | int calculated_max; | |
213 | }; | |
214 | ||
84edbeea AM |
215 | /** |
216 | * struct ab8500_charger - ab8500 Charger device information | |
217 | * @dev: Pointer to the structure device | |
84edbeea AM |
218 | * @vbus_detected: VBUS detected |
219 | * @vbus_detected_start: | |
220 | * VBUS detected during startup | |
221 | * @ac_conn: This will be true when the AC charger has been plugged | |
222 | * @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC | |
223 | * charger is enabled | |
224 | * @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB | |
225 | * charger is enabled | |
226 | * @vbat Battery voltage | |
227 | * @old_vbat Previously measured battery voltage | |
4b45f4a9 | 228 | * @usb_device_is_unrecognised USB device is unrecognised by the hardware |
84edbeea | 229 | * @autopower Indicate if we should have automatic pwron after pwrloss |
4aef72db | 230 | * @autopower_cfg platform specific power config support for "pwron after pwrloss" |
ff38090a | 231 | * @invalid_charger_detect_state State when forcing AB to use invalid charger |
34c11a70 POH |
232 | * @is_aca_rid: Incicate if accessory is ACA type |
233 | * @current_stepping_sessions: | |
234 | * Counter for current stepping sessions | |
84edbeea AM |
235 | * @parent: Pointer to the struct ab8500 |
236 | * @gpadc: Pointer to the struct gpadc | |
b0284de0 | 237 | * @bm: Platform specific battery management information |
84edbeea AM |
238 | * @flags: Structure for information about events triggered |
239 | * @usb_state: Structure for usb stack information | |
f7470b5d | 240 | * @max_usb_in_curr: Max USB charger input current |
84edbeea AM |
241 | * @ac_chg: AC charger power supply |
242 | * @usb_chg: USB charger power supply | |
243 | * @ac: Structure that holds the AC charger properties | |
244 | * @usb: Structure that holds the USB charger properties | |
245 | * @regu: Pointer to the struct regulator | |
246 | * @charger_wq: Work queue for the IRQs and checking HW state | |
34c11a70 POH |
247 | * @usb_ipt_crnt_lock: Lock to protect VBUS input current setting from mutuals |
248 | * @pm_lock: Lock to prevent system to suspend | |
84edbeea AM |
249 | * @check_vbat_work Work for checking vbat threshold to adjust vbus current |
250 | * @check_hw_failure_work: Work for checking HW state | |
251 | * @check_usbchgnotok_work: Work for checking USB charger not ok status | |
252 | * @kick_wd_work: Work for kicking the charger watchdog in case | |
253 | * of ABB rev 1.* due to the watchog logic bug | |
b269fff4 LJ |
254 | * @ac_charger_attached_work: Work for checking if AC charger is still |
255 | * connected | |
256 | * @usb_charger_attached_work: Work for checking if USB charger is still | |
257 | * connected | |
84edbeea AM |
258 | * @ac_work: Work for checking AC charger connection |
259 | * @detect_usb_type_work: Work for detecting the USB type connected | |
260 | * @usb_link_status_work: Work for checking the new USB link status | |
261 | * @usb_state_changed_work: Work for checking USB state | |
34c11a70 POH |
262 | * @attach_work: Work for detecting USB type |
263 | * @vbus_drop_end_work: Work for detecting VBUS drop end | |
84edbeea AM |
264 | * @check_main_thermal_prot_work: |
265 | * Work for checking Main thermal status | |
266 | * @check_usb_thermal_prot_work: | |
267 | * Work for checking USB thermal status | |
b269fff4 | 268 | * @charger_attached_mutex: For controlling the wakelock |
84edbeea AM |
269 | */ |
270 | struct ab8500_charger { | |
271 | struct device *dev; | |
84edbeea AM |
272 | bool vbus_detected; |
273 | bool vbus_detected_start; | |
274 | bool ac_conn; | |
275 | bool vddadc_en_ac; | |
276 | bool vddadc_en_usb; | |
277 | int vbat; | |
278 | int old_vbat; | |
4b45f4a9 | 279 | bool usb_device_is_unrecognised; |
84edbeea | 280 | bool autopower; |
4aef72db | 281 | bool autopower_cfg; |
ff38090a | 282 | int invalid_charger_detect_state; |
34c11a70 POH |
283 | int is_aca_rid; |
284 | atomic_t current_stepping_sessions; | |
84edbeea AM |
285 | struct ab8500 *parent; |
286 | struct ab8500_gpadc *gpadc; | |
b0284de0 | 287 | struct abx500_bm_data *bm; |
84edbeea AM |
288 | struct ab8500_charger_event_flags flags; |
289 | struct ab8500_charger_usb_state usb_state; | |
f7470b5d | 290 | struct ab8500_charger_max_usb_in_curr max_usb_in_curr; |
84edbeea AM |
291 | struct ux500_charger ac_chg; |
292 | struct ux500_charger usb_chg; | |
293 | struct ab8500_charger_info ac; | |
294 | struct ab8500_charger_info usb; | |
295 | struct regulator *regu; | |
296 | struct workqueue_struct *charger_wq; | |
34c11a70 | 297 | struct mutex usb_ipt_crnt_lock; |
84edbeea AM |
298 | struct delayed_work check_vbat_work; |
299 | struct delayed_work check_hw_failure_work; | |
300 | struct delayed_work check_usbchgnotok_work; | |
301 | struct delayed_work kick_wd_work; | |
34c11a70 | 302 | struct delayed_work usb_state_changed_work; |
4b45f4a9 | 303 | struct delayed_work attach_work; |
b269fff4 LJ |
304 | struct delayed_work ac_charger_attached_work; |
305 | struct delayed_work usb_charger_attached_work; | |
34c11a70 | 306 | struct delayed_work vbus_drop_end_work; |
84edbeea AM |
307 | struct work_struct ac_work; |
308 | struct work_struct detect_usb_type_work; | |
309 | struct work_struct usb_link_status_work; | |
84edbeea AM |
310 | struct work_struct check_main_thermal_prot_work; |
311 | struct work_struct check_usb_thermal_prot_work; | |
efd71c89 | 312 | struct usb_phy *usb_phy; |
84edbeea | 313 | struct notifier_block nb; |
b269fff4 | 314 | struct mutex charger_attached_mutex; |
84edbeea AM |
315 | }; |
316 | ||
317 | /* AC properties */ | |
318 | static enum power_supply_property ab8500_charger_ac_props[] = { | |
319 | POWER_SUPPLY_PROP_HEALTH, | |
320 | POWER_SUPPLY_PROP_PRESENT, | |
321 | POWER_SUPPLY_PROP_ONLINE, | |
322 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
323 | POWER_SUPPLY_PROP_VOLTAGE_AVG, | |
324 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
325 | }; | |
326 | ||
327 | /* USB properties */ | |
328 | static enum power_supply_property ab8500_charger_usb_props[] = { | |
329 | POWER_SUPPLY_PROP_HEALTH, | |
330 | POWER_SUPPLY_PROP_CURRENT_AVG, | |
331 | POWER_SUPPLY_PROP_PRESENT, | |
332 | POWER_SUPPLY_PROP_ONLINE, | |
333 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
334 | POWER_SUPPLY_PROP_VOLTAGE_AVG, | |
335 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
336 | }; | |
337 | ||
defbfa9c POH |
338 | /* |
339 | * Function for enabling and disabling sw fallback mode | |
340 | * should always be disabled when no charger is connected. | |
84edbeea | 341 | */ |
defbfa9c POH |
342 | static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di, |
343 | bool fallback) | |
84edbeea | 344 | { |
b0163222 | 345 | u8 val; |
84edbeea | 346 | u8 reg; |
b0163222 NG |
347 | u8 bank; |
348 | u8 bit; | |
84edbeea AM |
349 | int ret; |
350 | ||
defbfa9c | 351 | dev_dbg(di->dev, "SW Fallback: %d\n", fallback); |
84edbeea | 352 | |
b0163222 NG |
353 | if (is_ab8500(di->parent)) { |
354 | bank = 0x15; | |
355 | reg = 0x0; | |
356 | bit = 3; | |
357 | } else { | |
358 | bank = AB8500_SYS_CTRL1_BLOCK; | |
359 | reg = AB8500_SW_CONTROL_FALLBACK; | |
360 | bit = 0; | |
361 | } | |
362 | ||
defbfa9c | 363 | /* read the register containing fallback bit */ |
b0163222 NG |
364 | ret = abx500_get_register_interruptible(di->dev, bank, reg, &val); |
365 | if (ret < 0) { | |
366 | dev_err(di->dev, "%d read failed\n", __LINE__); | |
84edbeea AM |
367 | return; |
368 | } | |
369 | ||
b0163222 NG |
370 | if (is_ab8500(di->parent)) { |
371 | /* enable the OPT emulation registers */ | |
372 | ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2); | |
373 | if (ret) { | |
374 | dev_err(di->dev, "%d write failed\n", __LINE__); | |
375 | goto disable_otp; | |
376 | } | |
84edbeea AM |
377 | } |
378 | ||
defbfa9c | 379 | if (fallback) |
b0163222 | 380 | val |= (1 << bit); |
84edbeea | 381 | else |
b0163222 | 382 | val &= ~(1 << bit); |
84edbeea | 383 | |
defbfa9c | 384 | /* write back the changed fallback bit value to register */ |
b0163222 | 385 | ret = abx500_set_register_interruptible(di->dev, bank, reg, val); |
84edbeea AM |
386 | if (ret) { |
387 | dev_err(di->dev, "%d write failed\n", __LINE__); | |
84edbeea AM |
388 | } |
389 | ||
b0163222 NG |
390 | disable_otp: |
391 | if (is_ab8500(di->parent)) { | |
392 | /* disable the set OTP registers again */ | |
393 | ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0); | |
394 | if (ret) { | |
395 | dev_err(di->dev, "%d write failed\n", __LINE__); | |
396 | } | |
84edbeea AM |
397 | } |
398 | } | |
399 | ||
400 | /** | |
401 | * ab8500_power_supply_changed - a wrapper with local extentions for | |
402 | * power_supply_changed | |
403 | * @di: pointer to the ab8500_charger structure | |
404 | * @psy: pointer to power_supply_that have changed. | |
405 | * | |
406 | */ | |
407 | static void ab8500_power_supply_changed(struct ab8500_charger *di, | |
408 | struct power_supply *psy) | |
409 | { | |
4aef72db | 410 | if (di->autopower_cfg) { |
84edbeea AM |
411 | if (!di->usb.charger_connected && |
412 | !di->ac.charger_connected && | |
413 | di->autopower) { | |
414 | di->autopower = false; | |
defbfa9c | 415 | ab8500_enable_disable_sw_fallback(di, false); |
84edbeea AM |
416 | } else if (!di->autopower && |
417 | (di->ac.charger_connected || | |
418 | di->usb.charger_connected)) { | |
419 | di->autopower = true; | |
defbfa9c | 420 | ab8500_enable_disable_sw_fallback(di, true); |
84edbeea AM |
421 | } |
422 | } | |
423 | power_supply_changed(psy); | |
424 | } | |
425 | ||
426 | static void ab8500_charger_set_usb_connected(struct ab8500_charger *di, | |
427 | bool connected) | |
428 | { | |
429 | if (connected != di->usb.charger_connected) { | |
430 | dev_dbg(di->dev, "USB connected:%i\n", connected); | |
431 | di->usb.charger_connected = connected; | |
f7470b5d LJ |
432 | |
433 | if (!connected) | |
434 | di->flags.vbus_drop_end = false; | |
435 | ||
297d716f | 436 | sysfs_notify(&di->usb_chg.psy->dev.kobj, NULL, "present"); |
b269fff4 LJ |
437 | |
438 | if (connected) { | |
439 | mutex_lock(&di->charger_attached_mutex); | |
440 | mutex_unlock(&di->charger_attached_mutex); | |
441 | ||
261c5136 RV |
442 | if (is_ab8500(di->parent)) |
443 | queue_delayed_work(di->charger_wq, | |
b269fff4 LJ |
444 | &di->usb_charger_attached_work, |
445 | HZ); | |
446 | } else { | |
447 | cancel_delayed_work_sync(&di->usb_charger_attached_work); | |
448 | mutex_lock(&di->charger_attached_mutex); | |
449 | mutex_unlock(&di->charger_attached_mutex); | |
450 | } | |
84edbeea AM |
451 | } |
452 | } | |
453 | ||
454 | /** | |
455 | * ab8500_charger_get_ac_voltage() - get ac charger voltage | |
456 | * @di: pointer to the ab8500_charger structure | |
457 | * | |
458 | * Returns ac charger voltage (on success) | |
459 | */ | |
460 | static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di) | |
461 | { | |
462 | int vch; | |
463 | ||
464 | /* Only measure voltage if the charger is connected */ | |
465 | if (di->ac.charger_connected) { | |
466 | vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V); | |
467 | if (vch < 0) | |
468 | dev_err(di->dev, "%s gpadc conv failed,\n", __func__); | |
469 | } else { | |
470 | vch = 0; | |
471 | } | |
472 | return vch; | |
473 | } | |
474 | ||
475 | /** | |
476 | * ab8500_charger_ac_cv() - check if the main charger is in CV mode | |
477 | * @di: pointer to the ab8500_charger structure | |
478 | * | |
479 | * Returns ac charger CV mode (on success) else error code | |
480 | */ | |
481 | static int ab8500_charger_ac_cv(struct ab8500_charger *di) | |
482 | { | |
483 | u8 val; | |
484 | int ret = 0; | |
485 | ||
486 | /* Only check CV mode if the charger is online */ | |
487 | if (di->ac.charger_online) { | |
488 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
489 | AB8500_CH_STATUS1_REG, &val); | |
490 | if (ret < 0) { | |
491 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
492 | return 0; | |
493 | } | |
494 | ||
495 | if (val & MAIN_CH_CV_ON) | |
496 | ret = 1; | |
497 | else | |
498 | ret = 0; | |
499 | } | |
500 | ||
501 | return ret; | |
502 | } | |
503 | ||
504 | /** | |
505 | * ab8500_charger_get_vbus_voltage() - get vbus voltage | |
506 | * @di: pointer to the ab8500_charger structure | |
507 | * | |
508 | * This function returns the vbus voltage. | |
509 | * Returns vbus voltage (on success) | |
510 | */ | |
511 | static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di) | |
512 | { | |
513 | int vch; | |
514 | ||
515 | /* Only measure voltage if the charger is connected */ | |
516 | if (di->usb.charger_connected) { | |
517 | vch = ab8500_gpadc_convert(di->gpadc, VBUS_V); | |
518 | if (vch < 0) | |
519 | dev_err(di->dev, "%s gpadc conv failed\n", __func__); | |
520 | } else { | |
521 | vch = 0; | |
522 | } | |
523 | return vch; | |
524 | } | |
525 | ||
526 | /** | |
527 | * ab8500_charger_get_usb_current() - get usb charger current | |
528 | * @di: pointer to the ab8500_charger structure | |
529 | * | |
530 | * This function returns the usb charger current. | |
531 | * Returns usb current (on success) and error code on failure | |
532 | */ | |
533 | static int ab8500_charger_get_usb_current(struct ab8500_charger *di) | |
534 | { | |
535 | int ich; | |
536 | ||
537 | /* Only measure current if the charger is online */ | |
538 | if (di->usb.charger_online) { | |
539 | ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C); | |
540 | if (ich < 0) | |
541 | dev_err(di->dev, "%s gpadc conv failed\n", __func__); | |
542 | } else { | |
543 | ich = 0; | |
544 | } | |
545 | return ich; | |
546 | } | |
547 | ||
548 | /** | |
549 | * ab8500_charger_get_ac_current() - get ac charger current | |
550 | * @di: pointer to the ab8500_charger structure | |
551 | * | |
552 | * This function returns the ac charger current. | |
553 | * Returns ac current (on success) and error code on failure. | |
554 | */ | |
555 | static int ab8500_charger_get_ac_current(struct ab8500_charger *di) | |
556 | { | |
557 | int ich; | |
558 | ||
559 | /* Only measure current if the charger is online */ | |
560 | if (di->ac.charger_online) { | |
561 | ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C); | |
562 | if (ich < 0) | |
563 | dev_err(di->dev, "%s gpadc conv failed\n", __func__); | |
564 | } else { | |
565 | ich = 0; | |
566 | } | |
567 | return ich; | |
568 | } | |
569 | ||
570 | /** | |
571 | * ab8500_charger_usb_cv() - check if the usb charger is in CV mode | |
572 | * @di: pointer to the ab8500_charger structure | |
573 | * | |
574 | * Returns ac charger CV mode (on success) else error code | |
575 | */ | |
576 | static int ab8500_charger_usb_cv(struct ab8500_charger *di) | |
577 | { | |
578 | int ret; | |
579 | u8 val; | |
580 | ||
581 | /* Only check CV mode if the charger is online */ | |
582 | if (di->usb.charger_online) { | |
583 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
584 | AB8500_CH_USBCH_STAT1_REG, &val); | |
585 | if (ret < 0) { | |
586 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
587 | return 0; | |
588 | } | |
589 | ||
590 | if (val & USB_CH_CV_ON) | |
591 | ret = 1; | |
592 | else | |
593 | ret = 0; | |
594 | } else { | |
595 | ret = 0; | |
596 | } | |
597 | ||
598 | return ret; | |
599 | } | |
600 | ||
601 | /** | |
602 | * ab8500_charger_detect_chargers() - Detect the connected chargers | |
603 | * @di: pointer to the ab8500_charger structure | |
34c11a70 | 604 | * @probe: if probe, don't delay and wait for HW |
84edbeea AM |
605 | * |
606 | * Returns the type of charger connected. | |
607 | * For USB it will not mean we can actually charge from it | |
608 | * but that there is a USB cable connected that we have to | |
609 | * identify. This is used during startup when we don't get | |
610 | * interrupts of the charger detection | |
611 | * | |
612 | * Returns an integer value, that means, | |
613 | * NO_PW_CONN no power supply is connected | |
614 | * AC_PW_CONN if the AC power supply is connected | |
615 | * USB_PW_CONN if the USB power supply is connected | |
616 | * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected | |
617 | */ | |
34c11a70 | 618 | static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe) |
84edbeea AM |
619 | { |
620 | int result = NO_PW_CONN; | |
621 | int ret; | |
622 | u8 val; | |
623 | ||
624 | /* Check for AC charger */ | |
625 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
626 | AB8500_CH_STATUS1_REG, &val); | |
627 | if (ret < 0) { | |
628 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
629 | return ret; | |
630 | } | |
631 | ||
632 | if (val & MAIN_CH_DET) | |
633 | result = AC_PW_CONN; | |
634 | ||
635 | /* Check for USB charger */ | |
34c11a70 POH |
636 | |
637 | if (!probe) { | |
638 | /* | |
639 | * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100 | |
640 | * when disconnecting ACA even though no | |
641 | * charger was connected. Try waiting a little | |
642 | * longer than the 100 ms of VBUS_DET_DBNC100... | |
643 | */ | |
644 | msleep(110); | |
645 | } | |
84edbeea AM |
646 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, |
647 | AB8500_CH_USBCH_STAT1_REG, &val); | |
648 | if (ret < 0) { | |
649 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
650 | return ret; | |
651 | } | |
34c11a70 POH |
652 | dev_dbg(di->dev, |
653 | "%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__, | |
654 | val); | |
84edbeea AM |
655 | if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100)) |
656 | result |= USB_PW_CONN; | |
657 | ||
658 | return result; | |
659 | } | |
660 | ||
661 | /** | |
662 | * ab8500_charger_max_usb_curr() - get the max curr for the USB type | |
663 | * @di: pointer to the ab8500_charger structure | |
664 | * @link_status: the identified USB type | |
665 | * | |
666 | * Get the maximum current that is allowed to be drawn from the host | |
667 | * based on the USB type. | |
668 | * Returns error code in case of failure else 0 on success | |
669 | */ | |
670 | static int ab8500_charger_max_usb_curr(struct ab8500_charger *di, | |
74a8e349 | 671 | enum ab8500_charger_link_status link_status) |
84edbeea AM |
672 | { |
673 | int ret = 0; | |
674 | ||
4b45f4a9 MC |
675 | di->usb_device_is_unrecognised = false; |
676 | ||
34c11a70 POH |
677 | /* |
678 | * Platform only supports USB 2.0. | |
679 | * This means that charging current from USB source | |
680 | * is maximum 500 mA. Every occurence of USB_STAT_*_HOST_* | |
681 | * should set USB_CH_IP_CUR_LVL_0P5. | |
682 | */ | |
683 | ||
84edbeea AM |
684 | switch (link_status) { |
685 | case USB_STAT_STD_HOST_NC: | |
686 | case USB_STAT_STD_HOST_C_NS: | |
687 | case USB_STAT_STD_HOST_C_S: | |
688 | dev_dbg(di->dev, "USB Type - Standard host is " | |
34c11a70 | 689 | "detected through USB driver\n"); |
f7470b5d | 690 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
34c11a70 | 691 | di->is_aca_rid = 0; |
84edbeea AM |
692 | break; |
693 | case USB_STAT_HOST_CHG_HS_CHIRP: | |
f7470b5d | 694 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
34c11a70 | 695 | di->is_aca_rid = 0; |
84edbeea AM |
696 | break; |
697 | case USB_STAT_HOST_CHG_HS: | |
f7470b5d | 698 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
34c11a70 POH |
699 | di->is_aca_rid = 0; |
700 | break; | |
84edbeea | 701 | case USB_STAT_ACA_RID_C_HS: |
f7470b5d | 702 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P9; |
34c11a70 | 703 | di->is_aca_rid = 0; |
84edbeea AM |
704 | break; |
705 | case USB_STAT_ACA_RID_A: | |
706 | /* | |
707 | * Dedicated charger level minus maximum current accessory | |
34c11a70 | 708 | * can consume (900mA). Closest level is 500mA |
84edbeea | 709 | */ |
34c11a70 | 710 | dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n"); |
f7470b5d | 711 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
34c11a70 | 712 | di->is_aca_rid = 1; |
84edbeea AM |
713 | break; |
714 | case USB_STAT_ACA_RID_B: | |
715 | /* | |
716 | * Dedicated charger level minus 120mA (20mA for ACA and | |
717 | * 100mA for potential accessory). Closest level is 1300mA | |
718 | */ | |
f7470b5d | 719 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P3; |
74a8e349 | 720 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, |
f7470b5d | 721 | di->max_usb_in_curr.usb_type_max); |
34c11a70 | 722 | di->is_aca_rid = 1; |
84edbeea | 723 | break; |
84edbeea | 724 | case USB_STAT_HOST_CHG_NM: |
f7470b5d | 725 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
34c11a70 POH |
726 | di->is_aca_rid = 0; |
727 | break; | |
74a8e349 | 728 | case USB_STAT_DEDICATED_CHG: |
f7470b5d | 729 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5; |
34c11a70 POH |
730 | di->is_aca_rid = 0; |
731 | break; | |
74a8e349 | 732 | case USB_STAT_ACA_RID_C_HS_CHIRP: |
34c11a70 | 733 | case USB_STAT_ACA_RID_C_NM: |
f7470b5d | 734 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5; |
34c11a70 | 735 | di->is_aca_rid = 1; |
84edbeea | 736 | break; |
4b45f4a9 MC |
737 | case USB_STAT_NOT_CONFIGURED: |
738 | if (di->vbus_detected) { | |
739 | di->usb_device_is_unrecognised = true; | |
740 | dev_dbg(di->dev, "USB Type - Legacy charger.\n"); | |
f7470b5d LJ |
741 | di->max_usb_in_curr.usb_type_max = |
742 | USB_CH_IP_CUR_LVL_1P5; | |
4b45f4a9 MC |
743 | break; |
744 | } | |
84edbeea | 745 | case USB_STAT_HM_IDGND: |
84edbeea | 746 | dev_err(di->dev, "USB Type - Charging not allowed\n"); |
f7470b5d | 747 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05; |
84edbeea AM |
748 | ret = -ENXIO; |
749 | break; | |
74a8e349 HB |
750 | case USB_STAT_RESERVED: |
751 | if (is_ab8500(di->parent)) { | |
752 | di->flags.vbus_collapse = true; | |
753 | dev_err(di->dev, "USB Type - USB_STAT_RESERVED " | |
754 | "VBUS has collapsed\n"); | |
755 | ret = -ENXIO; | |
756 | break; | |
861a30da | 757 | } else { |
74a8e349 | 758 | dev_dbg(di->dev, "USB Type - Charging not allowed\n"); |
f7470b5d LJ |
759 | di->max_usb_in_curr.usb_type_max = |
760 | USB_CH_IP_CUR_LVL_0P05; | |
74a8e349 | 761 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", |
f7470b5d LJ |
762 | link_status, |
763 | di->max_usb_in_curr.usb_type_max); | |
74a8e349 HB |
764 | ret = -ENXIO; |
765 | break; | |
766 | } | |
74a8e349 HB |
767 | case USB_STAT_CARKIT_1: |
768 | case USB_STAT_CARKIT_2: | |
769 | case USB_STAT_ACA_DOCK_CHARGER: | |
770 | case USB_STAT_CHARGER_LINE_1: | |
f7470b5d | 771 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
74a8e349 | 772 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, |
f7470b5d | 773 | di->max_usb_in_curr.usb_type_max); |
ed5243f8 | 774 | break; |
ff38090a HS |
775 | case USB_STAT_NOT_VALID_LINK: |
776 | dev_err(di->dev, "USB Type invalid - try charging anyway\n"); | |
f7470b5d | 777 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
74a8e349 HB |
778 | break; |
779 | ||
84edbeea AM |
780 | default: |
781 | dev_err(di->dev, "USB Type - Unknown\n"); | |
f7470b5d | 782 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05; |
84edbeea AM |
783 | ret = -ENXIO; |
784 | break; | |
785 | }; | |
786 | ||
f7470b5d | 787 | di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max; |
84edbeea | 788 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", |
f7470b5d | 789 | link_status, di->max_usb_in_curr.set_max); |
84edbeea AM |
790 | |
791 | return ret; | |
792 | } | |
793 | ||
794 | /** | |
795 | * ab8500_charger_read_usb_type() - read the type of usb connected | |
796 | * @di: pointer to the ab8500_charger structure | |
797 | * | |
798 | * Detect the type of the plugged USB | |
799 | * Returns error code in case of failure else 0 on success | |
800 | */ | |
801 | static int ab8500_charger_read_usb_type(struct ab8500_charger *di) | |
802 | { | |
803 | int ret; | |
804 | u8 val; | |
805 | ||
806 | ret = abx500_get_register_interruptible(di->dev, | |
807 | AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val); | |
808 | if (ret < 0) { | |
809 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
810 | return ret; | |
811 | } | |
861a30da | 812 | if (is_ab8500(di->parent)) |
74a8e349 | 813 | ret = abx500_get_register_interruptible(di->dev, AB8500_USB, |
861a30da LJ |
814 | AB8500_USB_LINE_STAT_REG, &val); |
815 | else | |
816 | ret = abx500_get_register_interruptible(di->dev, | |
817 | AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val); | |
84edbeea AM |
818 | if (ret < 0) { |
819 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
820 | return ret; | |
821 | } | |
822 | ||
823 | /* get the USB type */ | |
861a30da LJ |
824 | if (is_ab8500(di->parent)) |
825 | val = (val & AB8500_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT; | |
826 | else | |
827 | val = (val & AB8505_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT; | |
84edbeea AM |
828 | ret = ab8500_charger_max_usb_curr(di, |
829 | (enum ab8500_charger_link_status) val); | |
830 | ||
831 | return ret; | |
832 | } | |
833 | ||
834 | /** | |
835 | * ab8500_charger_detect_usb_type() - get the type of usb connected | |
836 | * @di: pointer to the ab8500_charger structure | |
837 | * | |
838 | * Detect the type of the plugged USB | |
839 | * Returns error code in case of failure else 0 on success | |
840 | */ | |
841 | static int ab8500_charger_detect_usb_type(struct ab8500_charger *di) | |
842 | { | |
843 | int i, ret; | |
844 | u8 val; | |
845 | ||
846 | /* | |
847 | * On getting the VBUS rising edge detect interrupt there | |
848 | * is a 250ms delay after which the register UsbLineStatus | |
849 | * is filled with valid data. | |
850 | */ | |
851 | for (i = 0; i < 10; i++) { | |
852 | msleep(250); | |
853 | ret = abx500_get_register_interruptible(di->dev, | |
854 | AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, | |
855 | &val); | |
34c11a70 POH |
856 | dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n", |
857 | __func__, val); | |
84edbeea AM |
858 | if (ret < 0) { |
859 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
860 | return ret; | |
861 | } | |
74a8e349 | 862 | |
861a30da | 863 | if (is_ab8500(di->parent)) |
74a8e349 HB |
864 | ret = abx500_get_register_interruptible(di->dev, |
865 | AB8500_USB, AB8500_USB_LINE_STAT_REG, &val); | |
861a30da | 866 | else |
74a8e349 HB |
867 | ret = abx500_get_register_interruptible(di->dev, |
868 | AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val); | |
84edbeea AM |
869 | if (ret < 0) { |
870 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
871 | return ret; | |
872 | } | |
34c11a70 POH |
873 | dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__, |
874 | val); | |
84edbeea AM |
875 | /* |
876 | * Until the IT source register is read the UsbLineStatus | |
877 | * register is not updated, hence doing the same | |
878 | * Revisit this: | |
879 | */ | |
880 | ||
881 | /* get the USB type */ | |
861a30da LJ |
882 | if (is_ab8500(di->parent)) |
883 | val = (val & AB8500_USB_LINK_STATUS) >> | |
884 | USB_LINK_STATUS_SHIFT; | |
885 | else | |
886 | val = (val & AB8505_USB_LINK_STATUS) >> | |
887 | USB_LINK_STATUS_SHIFT; | |
84edbeea AM |
888 | if (val) |
889 | break; | |
890 | } | |
891 | ret = ab8500_charger_max_usb_curr(di, | |
892 | (enum ab8500_charger_link_status) val); | |
893 | ||
894 | return ret; | |
895 | } | |
896 | ||
897 | /* | |
898 | * This array maps the raw hex value to charger voltage used by the AB8500 | |
899 | * Values taken from the UM0836 | |
900 | */ | |
901 | static int ab8500_charger_voltage_map[] = { | |
902 | 3500 , | |
903 | 3525 , | |
904 | 3550 , | |
905 | 3575 , | |
906 | 3600 , | |
907 | 3625 , | |
908 | 3650 , | |
909 | 3675 , | |
910 | 3700 , | |
911 | 3725 , | |
912 | 3750 , | |
913 | 3775 , | |
914 | 3800 , | |
915 | 3825 , | |
916 | 3850 , | |
917 | 3875 , | |
918 | 3900 , | |
919 | 3925 , | |
920 | 3950 , | |
921 | 3975 , | |
922 | 4000 , | |
923 | 4025 , | |
924 | 4050 , | |
925 | 4060 , | |
926 | 4070 , | |
927 | 4080 , | |
928 | 4090 , | |
929 | 4100 , | |
930 | 4110 , | |
931 | 4120 , | |
932 | 4130 , | |
933 | 4140 , | |
934 | 4150 , | |
935 | 4160 , | |
936 | 4170 , | |
937 | 4180 , | |
938 | 4190 , | |
939 | 4200 , | |
940 | 4210 , | |
941 | 4220 , | |
942 | 4230 , | |
943 | 4240 , | |
944 | 4250 , | |
945 | 4260 , | |
946 | 4270 , | |
947 | 4280 , | |
948 | 4290 , | |
949 | 4300 , | |
950 | 4310 , | |
951 | 4320 , | |
952 | 4330 , | |
953 | 4340 , | |
954 | 4350 , | |
955 | 4360 , | |
956 | 4370 , | |
957 | 4380 , | |
958 | 4390 , | |
959 | 4400 , | |
960 | 4410 , | |
961 | 4420 , | |
962 | 4430 , | |
963 | 4440 , | |
964 | 4450 , | |
965 | 4460 , | |
966 | 4470 , | |
967 | 4480 , | |
968 | 4490 , | |
969 | 4500 , | |
970 | 4510 , | |
971 | 4520 , | |
972 | 4530 , | |
973 | 4540 , | |
974 | 4550 , | |
975 | 4560 , | |
976 | 4570 , | |
977 | 4580 , | |
978 | 4590 , | |
979 | 4600 , | |
980 | }; | |
981 | ||
84edbeea AM |
982 | static int ab8500_voltage_to_regval(int voltage) |
983 | { | |
984 | int i; | |
985 | ||
986 | /* Special case for voltage below 3.5V */ | |
987 | if (voltage < ab8500_charger_voltage_map[0]) | |
988 | return LOW_VOLT_REG; | |
989 | ||
990 | for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) { | |
991 | if (voltage < ab8500_charger_voltage_map[i]) | |
992 | return i - 1; | |
993 | } | |
994 | ||
995 | /* If not last element, return error */ | |
996 | i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1; | |
997 | if (voltage == ab8500_charger_voltage_map[i]) | |
998 | return i; | |
999 | else | |
1000 | return -1; | |
1001 | } | |
1002 | ||
861a30da | 1003 | static int ab8500_current_to_regval(struct ab8500_charger *di, int curr) |
84edbeea AM |
1004 | { |
1005 | int i; | |
1006 | ||
861a30da | 1007 | if (curr < di->bm->chg_output_curr[0]) |
84edbeea AM |
1008 | return 0; |
1009 | ||
861a30da LJ |
1010 | for (i = 0; i < di->bm->n_chg_out_curr; i++) { |
1011 | if (curr < di->bm->chg_output_curr[i]) | |
84edbeea AM |
1012 | return i - 1; |
1013 | } | |
1014 | ||
1015 | /* If not last element, return error */ | |
861a30da LJ |
1016 | i = di->bm->n_chg_out_curr - 1; |
1017 | if (curr == di->bm->chg_output_curr[i]) | |
84edbeea AM |
1018 | return i; |
1019 | else | |
1020 | return -1; | |
1021 | } | |
1022 | ||
861a30da | 1023 | static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr) |
84edbeea AM |
1024 | { |
1025 | int i; | |
1026 | ||
861a30da | 1027 | if (curr < di->bm->chg_input_curr[0]) |
84edbeea AM |
1028 | return 0; |
1029 | ||
861a30da LJ |
1030 | for (i = 0; i < di->bm->n_chg_in_curr; i++) { |
1031 | if (curr < di->bm->chg_input_curr[i]) | |
84edbeea AM |
1032 | return i - 1; |
1033 | } | |
1034 | ||
1035 | /* If not last element, return error */ | |
861a30da LJ |
1036 | i = di->bm->n_chg_in_curr - 1; |
1037 | if (curr == di->bm->chg_input_curr[i]) | |
84edbeea AM |
1038 | return i; |
1039 | else | |
1040 | return -1; | |
1041 | } | |
1042 | ||
1043 | /** | |
1044 | * ab8500_charger_get_usb_cur() - get usb current | |
1045 | * @di: pointer to the ab8500_charger structre | |
1046 | * | |
1047 | * The usb stack provides the maximum current that can be drawn from | |
1048 | * the standard usb host. This will be in mA. | |
1049 | * This function converts current in mA to a value that can be written | |
1050 | * to the register. Returns -1 if charging is not allowed | |
1051 | */ | |
1052 | static int ab8500_charger_get_usb_cur(struct ab8500_charger *di) | |
1053 | { | |
f7470b5d | 1054 | int ret = 0; |
84edbeea AM |
1055 | switch (di->usb_state.usb_current) { |
1056 | case 100: | |
f7470b5d | 1057 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P09; |
84edbeea AM |
1058 | break; |
1059 | case 200: | |
f7470b5d | 1060 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P19; |
84edbeea AM |
1061 | break; |
1062 | case 300: | |
f7470b5d | 1063 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P29; |
84edbeea AM |
1064 | break; |
1065 | case 400: | |
f7470b5d | 1066 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P38; |
84edbeea AM |
1067 | break; |
1068 | case 500: | |
f7470b5d | 1069 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
84edbeea AM |
1070 | break; |
1071 | default: | |
f7470b5d LJ |
1072 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05; |
1073 | ret = -EPERM; | |
84edbeea AM |
1074 | break; |
1075 | }; | |
f7470b5d LJ |
1076 | di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max; |
1077 | return ret; | |
1078 | } | |
1079 | ||
1080 | /** | |
1081 | * ab8500_charger_check_continue_stepping() - Check to allow stepping | |
1082 | * @di: pointer to the ab8500_charger structure | |
1083 | * @reg: select what charger register to check | |
1084 | * | |
1085 | * Check if current stepping should be allowed to continue. | |
1086 | * Checks if charger source has not collapsed. If it has, further stepping | |
1087 | * is not allowed. | |
1088 | */ | |
1089 | static bool ab8500_charger_check_continue_stepping(struct ab8500_charger *di, | |
1090 | int reg) | |
1091 | { | |
1092 | if (reg == AB8500_USBCH_IPT_CRNTLVL_REG) | |
1093 | return !di->flags.vbus_drop_end; | |
1094 | else | |
1095 | return true; | |
84edbeea AM |
1096 | } |
1097 | ||
f8e96dff JB |
1098 | /** |
1099 | * ab8500_charger_set_current() - set charger current | |
1100 | * @di: pointer to the ab8500_charger structure | |
1101 | * @ich: charger current, in mA | |
1102 | * @reg: select what charger register to set | |
1103 | * | |
1104 | * Set charger current. | |
1105 | * There is no state machine in the AB to step up/down the charger | |
1106 | * current to avoid dips and spikes on MAIN, VBUS and VBAT when | |
1107 | * charging is started. Instead we need to implement | |
1108 | * this charger current step-up/down here. | |
1109 | * Returns error code in case of failure else 0(on success) | |
1110 | */ | |
1111 | static int ab8500_charger_set_current(struct ab8500_charger *di, | |
1112 | int ich, int reg) | |
1113 | { | |
34c11a70 | 1114 | int ret = 0; |
861a30da | 1115 | int curr_index, prev_curr_index, shift_value, i; |
f8e96dff | 1116 | u8 reg_value; |
34c11a70 POH |
1117 | u32 step_udelay; |
1118 | bool no_stepping = false; | |
1119 | ||
1120 | atomic_inc(&di->current_stepping_sessions); | |
1121 | ||
1122 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
1123 | reg, ®_value); | |
1124 | if (ret < 0) { | |
1125 | dev_err(di->dev, "%s read failed\n", __func__); | |
1126 | goto exit_set_current; | |
1127 | } | |
f8e96dff JB |
1128 | |
1129 | switch (reg) { | |
1130 | case AB8500_MCH_IPT_CURLVL_REG: | |
1131 | shift_value = MAIN_CH_INPUT_CURR_SHIFT; | |
34c11a70 | 1132 | prev_curr_index = (reg_value >> shift_value); |
861a30da | 1133 | curr_index = ab8500_current_to_regval(di, ich); |
34c11a70 POH |
1134 | step_udelay = STEP_UDELAY; |
1135 | if (!di->ac.charger_connected) | |
1136 | no_stepping = true; | |
f8e96dff JB |
1137 | break; |
1138 | case AB8500_USBCH_IPT_CRNTLVL_REG: | |
4c4268dc | 1139 | shift_value = VBUS_IN_CURR_LIM_SHIFT; |
34c11a70 | 1140 | prev_curr_index = (reg_value >> shift_value); |
861a30da | 1141 | curr_index = ab8500_vbus_in_curr_to_regval(di, ich); |
34c11a70 POH |
1142 | step_udelay = STEP_UDELAY * 100; |
1143 | ||
34c11a70 POH |
1144 | if (!di->usb.charger_connected) |
1145 | no_stepping = true; | |
f8e96dff JB |
1146 | break; |
1147 | case AB8500_CH_OPT_CRNTLVL_REG: | |
1148 | shift_value = 0; | |
34c11a70 | 1149 | prev_curr_index = (reg_value >> shift_value); |
861a30da | 1150 | curr_index = ab8500_current_to_regval(di, ich); |
34c11a70 POH |
1151 | step_udelay = STEP_UDELAY; |
1152 | if (curr_index && (curr_index - prev_curr_index) > 1) | |
1153 | step_udelay *= 100; | |
1154 | ||
1155 | if (!di->usb.charger_connected && !di->ac.charger_connected) | |
1156 | no_stepping = true; | |
1157 | ||
f8e96dff JB |
1158 | break; |
1159 | default: | |
1160 | dev_err(di->dev, "%s current register not valid\n", __func__); | |
34c11a70 POH |
1161 | ret = -ENXIO; |
1162 | goto exit_set_current; | |
f8e96dff JB |
1163 | } |
1164 | ||
1165 | if (curr_index < 0) { | |
1166 | dev_err(di->dev, "requested current limit out-of-range\n"); | |
34c11a70 POH |
1167 | ret = -ENXIO; |
1168 | goto exit_set_current; | |
f8e96dff | 1169 | } |
f8e96dff JB |
1170 | |
1171 | /* only update current if it's been changed */ | |
34c11a70 POH |
1172 | if (prev_curr_index == curr_index) { |
1173 | dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n", | |
1174 | __func__, reg); | |
1175 | ret = 0; | |
1176 | goto exit_set_current; | |
1177 | } | |
f8e96dff JB |
1178 | |
1179 | dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n", | |
1180 | __func__, ich, reg); | |
1181 | ||
34c11a70 POH |
1182 | if (no_stepping) { |
1183 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1184 | reg, (u8)curr_index << shift_value); | |
1185 | if (ret) | |
1186 | dev_err(di->dev, "%s write failed\n", __func__); | |
1187 | } else if (prev_curr_index > curr_index) { | |
f8e96dff | 1188 | for (i = prev_curr_index - 1; i >= curr_index; i--) { |
34c11a70 POH |
1189 | dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n", |
1190 | (u8) i << shift_value, reg); | |
f8e96dff | 1191 | ret = abx500_set_register_interruptible(di->dev, |
34c11a70 | 1192 | AB8500_CHARGER, reg, (u8)i << shift_value); |
f8e96dff JB |
1193 | if (ret) { |
1194 | dev_err(di->dev, "%s write failed\n", __func__); | |
34c11a70 | 1195 | goto exit_set_current; |
f8e96dff | 1196 | } |
34c11a70 POH |
1197 | if (i != curr_index) |
1198 | usleep_range(step_udelay, step_udelay * 2); | |
f8e96dff JB |
1199 | } |
1200 | } else { | |
f7470b5d LJ |
1201 | bool allow = true; |
1202 | for (i = prev_curr_index + 1; i <= curr_index && allow; i++) { | |
34c11a70 POH |
1203 | dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n", |
1204 | (u8)i << shift_value, reg); | |
f8e96dff | 1205 | ret = abx500_set_register_interruptible(di->dev, |
34c11a70 | 1206 | AB8500_CHARGER, reg, (u8)i << shift_value); |
f8e96dff JB |
1207 | if (ret) { |
1208 | dev_err(di->dev, "%s write failed\n", __func__); | |
34c11a70 | 1209 | goto exit_set_current; |
f8e96dff | 1210 | } |
34c11a70 POH |
1211 | if (i != curr_index) |
1212 | usleep_range(step_udelay, step_udelay * 2); | |
f7470b5d LJ |
1213 | |
1214 | allow = ab8500_charger_check_continue_stepping(di, reg); | |
f8e96dff JB |
1215 | } |
1216 | } | |
34c11a70 POH |
1217 | |
1218 | exit_set_current: | |
1219 | atomic_dec(&di->current_stepping_sessions); | |
1220 | ||
f8e96dff JB |
1221 | return ret; |
1222 | } | |
1223 | ||
84edbeea AM |
1224 | /** |
1225 | * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit | |
1226 | * @di: pointer to the ab8500_charger structure | |
1227 | * @ich_in: charger input current limit | |
1228 | * | |
1229 | * Sets the current that can be drawn from the USB host | |
1230 | * Returns error code in case of failure else 0(on success) | |
1231 | */ | |
1232 | static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di, | |
1233 | int ich_in) | |
1234 | { | |
84edbeea | 1235 | int min_value; |
34c11a70 | 1236 | int ret; |
84edbeea AM |
1237 | |
1238 | /* We should always use to lowest current limit */ | |
b0284de0 | 1239 | min_value = min(di->bm->chg_params->usb_curr_max, ich_in); |
f7470b5d LJ |
1240 | if (di->max_usb_in_curr.set_max > 0) |
1241 | min_value = min(di->max_usb_in_curr.set_max, min_value); | |
1242 | ||
1243 | if (di->usb_state.usb_current >= 0) | |
1244 | min_value = min(di->usb_state.usb_current, min_value); | |
84edbeea AM |
1245 | |
1246 | switch (min_value) { | |
1247 | case 100: | |
1248 | if (di->vbat < VBAT_TRESH_IP_CUR_RED) | |
1249 | min_value = USB_CH_IP_CUR_LVL_0P05; | |
1250 | break; | |
1251 | case 500: | |
1252 | if (di->vbat < VBAT_TRESH_IP_CUR_RED) | |
1253 | min_value = USB_CH_IP_CUR_LVL_0P45; | |
1254 | break; | |
1255 | default: | |
1256 | break; | |
1257 | } | |
1258 | ||
34c11a70 POH |
1259 | dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value); |
1260 | ||
1261 | mutex_lock(&di->usb_ipt_crnt_lock); | |
1262 | ret = ab8500_charger_set_current(di, min_value, | |
f8e96dff | 1263 | AB8500_USBCH_IPT_CRNTLVL_REG); |
34c11a70 POH |
1264 | mutex_unlock(&di->usb_ipt_crnt_lock); |
1265 | ||
1266 | return ret; | |
f8e96dff | 1267 | } |
84edbeea | 1268 | |
f8e96dff JB |
1269 | /** |
1270 | * ab8500_charger_set_main_in_curr() - set main charger input current | |
1271 | * @di: pointer to the ab8500_charger structure | |
1272 | * @ich_in: input charger current, in mA | |
1273 | * | |
1274 | * Set main charger input current. | |
1275 | * Returns error code in case of failure else 0(on success) | |
1276 | */ | |
1277 | static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di, | |
1278 | int ich_in) | |
1279 | { | |
1280 | return ab8500_charger_set_current(di, ich_in, | |
1281 | AB8500_MCH_IPT_CURLVL_REG); | |
1282 | } | |
84edbeea | 1283 | |
f8e96dff JB |
1284 | /** |
1285 | * ab8500_charger_set_output_curr() - set charger output current | |
1286 | * @di: pointer to the ab8500_charger structure | |
1287 | * @ich_out: output charger current, in mA | |
1288 | * | |
1289 | * Set charger output current. | |
1290 | * Returns error code in case of failure else 0(on success) | |
1291 | */ | |
1292 | static int ab8500_charger_set_output_curr(struct ab8500_charger *di, | |
1293 | int ich_out) | |
1294 | { | |
1295 | return ab8500_charger_set_current(di, ich_out, | |
1296 | AB8500_CH_OPT_CRNTLVL_REG); | |
84edbeea AM |
1297 | } |
1298 | ||
1299 | /** | |
1300 | * ab8500_charger_led_en() - turn on/off chargign led | |
1301 | * @di: pointer to the ab8500_charger structure | |
1302 | * @on: flag to turn on/off the chargign led | |
1303 | * | |
1304 | * Power ON/OFF charging LED indication | |
1305 | * Returns error code in case of failure else 0(on success) | |
1306 | */ | |
1307 | static int ab8500_charger_led_en(struct ab8500_charger *di, int on) | |
1308 | { | |
1309 | int ret; | |
1310 | ||
1311 | if (on) { | |
1312 | /* Power ON charging LED indicator, set LED current to 5mA */ | |
1313 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1314 | AB8500_LED_INDICATOR_PWM_CTRL, | |
1315 | (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA)); | |
1316 | if (ret) { | |
1317 | dev_err(di->dev, "Power ON LED failed\n"); | |
1318 | return ret; | |
1319 | } | |
1320 | /* LED indicator PWM duty cycle 252/256 */ | |
1321 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1322 | AB8500_LED_INDICATOR_PWM_DUTY, | |
1323 | LED_INDICATOR_PWM_DUTY_252_256); | |
1324 | if (ret) { | |
1325 | dev_err(di->dev, "Set LED PWM duty cycle failed\n"); | |
1326 | return ret; | |
1327 | } | |
1328 | } else { | |
1329 | /* Power off charging LED indicator */ | |
1330 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1331 | AB8500_LED_INDICATOR_PWM_CTRL, | |
1332 | LED_INDICATOR_PWM_DIS); | |
1333 | if (ret) { | |
1334 | dev_err(di->dev, "Power-off LED failed\n"); | |
1335 | return ret; | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | return ret; | |
1340 | } | |
1341 | ||
1342 | /** | |
1343 | * ab8500_charger_ac_en() - enable or disable ac charging | |
1344 | * @di: pointer to the ab8500_charger structure | |
1345 | * @enable: enable/disable flag | |
1346 | * @vset: charging voltage | |
1347 | * @iset: charging current | |
1348 | * | |
1349 | * Enable/Disable AC/Mains charging and turns on/off the charging led | |
1350 | * respectively. | |
1351 | **/ | |
1352 | static int ab8500_charger_ac_en(struct ux500_charger *charger, | |
1353 | int enable, int vset, int iset) | |
1354 | { | |
1355 | int ret; | |
1356 | int volt_index; | |
1357 | int curr_index; | |
1358 | int input_curr_index; | |
1359 | u8 overshoot = 0; | |
1360 | ||
1361 | struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger); | |
1362 | ||
1363 | if (enable) { | |
1364 | /* Check if AC is connected */ | |
1365 | if (!di->ac.charger_connected) { | |
1366 | dev_err(di->dev, "AC charger not connected\n"); | |
1367 | return -ENXIO; | |
1368 | } | |
1369 | ||
1370 | /* Enable AC charging */ | |
1371 | dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset); | |
1372 | ||
1373 | /* | |
1374 | * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts | |
1375 | * will be triggered everytime we enable the VDD ADC supply. | |
1376 | * This will turn off charging for a short while. | |
1377 | * It can be avoided by having the supply on when | |
1378 | * there is a charger enabled. Normally the VDD ADC supply | |
1379 | * is enabled everytime a GPADC conversion is triggered. We will | |
1380 | * force it to be enabled from this driver to have | |
1381 | * the GPADC module independant of the AB8500 chargers | |
1382 | */ | |
1383 | if (!di->vddadc_en_ac) { | |
6de7ef3e SK |
1384 | ret = regulator_enable(di->regu); |
1385 | if (ret) | |
1386 | dev_warn(di->dev, | |
1387 | "Failed to enable regulator\n"); | |
1388 | else | |
1389 | di->vddadc_en_ac = true; | |
84edbeea AM |
1390 | } |
1391 | ||
1392 | /* Check if the requested voltage or current is valid */ | |
1393 | volt_index = ab8500_voltage_to_regval(vset); | |
861a30da LJ |
1394 | curr_index = ab8500_current_to_regval(di, iset); |
1395 | input_curr_index = ab8500_current_to_regval(di, | |
b0284de0 | 1396 | di->bm->chg_params->ac_curr_max); |
84edbeea AM |
1397 | if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) { |
1398 | dev_err(di->dev, | |
1399 | "Charger voltage or current too high, " | |
1400 | "charging not started\n"); | |
1401 | return -ENXIO; | |
1402 | } | |
1403 | ||
1404 | /* ChVoltLevel: maximum battery charging voltage */ | |
1405 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1406 | AB8500_CH_VOLT_LVL_REG, (u8) volt_index); | |
1407 | if (ret) { | |
1408 | dev_err(di->dev, "%s write failed\n", __func__); | |
1409 | return ret; | |
1410 | } | |
1411 | /* MainChInputCurr: current that can be drawn from the charger*/ | |
f8e96dff | 1412 | ret = ab8500_charger_set_main_in_curr(di, |
b0284de0 | 1413 | di->bm->chg_params->ac_curr_max); |
84edbeea | 1414 | if (ret) { |
f8e96dff JB |
1415 | dev_err(di->dev, "%s Failed to set MainChInputCurr\n", |
1416 | __func__); | |
84edbeea AM |
1417 | return ret; |
1418 | } | |
1419 | /* ChOutputCurentLevel: protected output current */ | |
f8e96dff | 1420 | ret = ab8500_charger_set_output_curr(di, iset); |
84edbeea | 1421 | if (ret) { |
f8e96dff JB |
1422 | dev_err(di->dev, "%s " |
1423 | "Failed to set ChOutputCurentLevel\n", | |
1424 | __func__); | |
84edbeea AM |
1425 | return ret; |
1426 | } | |
1427 | ||
1428 | /* Check if VBAT overshoot control should be enabled */ | |
b0284de0 | 1429 | if (!di->bm->enable_overshoot) |
84edbeea AM |
1430 | overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N; |
1431 | ||
1432 | /* Enable Main Charger */ | |
1433 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1434 | AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot); | |
1435 | if (ret) { | |
1436 | dev_err(di->dev, "%s write failed\n", __func__); | |
1437 | return ret; | |
1438 | } | |
1439 | ||
1440 | /* Power on charging LED indication */ | |
1441 | ret = ab8500_charger_led_en(di, true); | |
1442 | if (ret < 0) | |
1443 | dev_err(di->dev, "failed to enable LED\n"); | |
1444 | ||
1445 | di->ac.charger_online = 1; | |
1446 | } else { | |
1447 | /* Disable AC charging */ | |
1448 | if (is_ab8500_1p1_or_earlier(di->parent)) { | |
1449 | /* | |
1450 | * For ABB revision 1.0 and 1.1 there is a bug in the | |
1451 | * watchdog logic. That means we have to continously | |
1452 | * kick the charger watchdog even when no charger is | |
1453 | * connected. This is only valid once the AC charger | |
1454 | * has been enabled. This is a bug that is not handled | |
1455 | * by the algorithm and the watchdog have to be kicked | |
1456 | * by the charger driver when the AC charger | |
1457 | * is disabled | |
1458 | */ | |
1459 | if (di->ac_conn) { | |
1460 | queue_delayed_work(di->charger_wq, | |
1461 | &di->kick_wd_work, | |
1462 | round_jiffies(WD_KICK_INTERVAL)); | |
1463 | } | |
1464 | ||
1465 | /* | |
1466 | * We can't turn off charging completely | |
1467 | * due to a bug in AB8500 cut1. | |
1468 | * If we do, charging will not start again. | |
1469 | * That is why we set the lowest voltage | |
1470 | * and current possible | |
1471 | */ | |
1472 | ret = abx500_set_register_interruptible(di->dev, | |
1473 | AB8500_CHARGER, | |
1474 | AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5); | |
1475 | if (ret) { | |
1476 | dev_err(di->dev, | |
1477 | "%s write failed\n", __func__); | |
1478 | return ret; | |
1479 | } | |
1480 | ||
f8e96dff | 1481 | ret = ab8500_charger_set_output_curr(di, 0); |
84edbeea | 1482 | if (ret) { |
f8e96dff JB |
1483 | dev_err(di->dev, "%s " |
1484 | "Failed to set ChOutputCurentLevel\n", | |
1485 | __func__); | |
84edbeea AM |
1486 | return ret; |
1487 | } | |
1488 | } else { | |
1489 | ret = abx500_set_register_interruptible(di->dev, | |
1490 | AB8500_CHARGER, | |
1491 | AB8500_MCH_CTRL1, 0); | |
1492 | if (ret) { | |
1493 | dev_err(di->dev, | |
1494 | "%s write failed\n", __func__); | |
1495 | return ret; | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | ret = ab8500_charger_led_en(di, false); | |
1500 | if (ret < 0) | |
1501 | dev_err(di->dev, "failed to disable LED\n"); | |
1502 | ||
1503 | di->ac.charger_online = 0; | |
1504 | di->ac.wd_expired = false; | |
1505 | ||
1506 | /* Disable regulator if enabled */ | |
1507 | if (di->vddadc_en_ac) { | |
1508 | regulator_disable(di->regu); | |
1509 | di->vddadc_en_ac = false; | |
1510 | } | |
1511 | ||
1512 | dev_dbg(di->dev, "%s Disabled AC charging\n", __func__); | |
1513 | } | |
297d716f | 1514 | ab8500_power_supply_changed(di, di->ac_chg.psy); |
84edbeea AM |
1515 | |
1516 | return ret; | |
1517 | } | |
1518 | ||
1519 | /** | |
1520 | * ab8500_charger_usb_en() - enable usb charging | |
1521 | * @di: pointer to the ab8500_charger structure | |
1522 | * @enable: enable/disable flag | |
1523 | * @vset: charging voltage | |
1524 | * @ich_out: charger output current | |
1525 | * | |
1526 | * Enable/Disable USB charging and turns on/off the charging led respectively. | |
1527 | * Returns error code in case of failure else 0(on success) | |
1528 | */ | |
1529 | static int ab8500_charger_usb_en(struct ux500_charger *charger, | |
1530 | int enable, int vset, int ich_out) | |
1531 | { | |
1532 | int ret; | |
1533 | int volt_index; | |
1534 | int curr_index; | |
1535 | u8 overshoot = 0; | |
1536 | ||
1537 | struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger); | |
1538 | ||
1539 | if (enable) { | |
1540 | /* Check if USB is connected */ | |
1541 | if (!di->usb.charger_connected) { | |
1542 | dev_err(di->dev, "USB charger not connected\n"); | |
1543 | return -ENXIO; | |
1544 | } | |
1545 | ||
1546 | /* | |
1547 | * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts | |
1548 | * will be triggered everytime we enable the VDD ADC supply. | |
1549 | * This will turn off charging for a short while. | |
1550 | * It can be avoided by having the supply on when | |
1551 | * there is a charger enabled. Normally the VDD ADC supply | |
1552 | * is enabled everytime a GPADC conversion is triggered. We will | |
1553 | * force it to be enabled from this driver to have | |
1554 | * the GPADC module independant of the AB8500 chargers | |
1555 | */ | |
1556 | if (!di->vddadc_en_usb) { | |
6de7ef3e SK |
1557 | ret = regulator_enable(di->regu); |
1558 | if (ret) | |
1559 | dev_warn(di->dev, | |
1560 | "Failed to enable regulator\n"); | |
1561 | else | |
1562 | di->vddadc_en_usb = true; | |
84edbeea AM |
1563 | } |
1564 | ||
1565 | /* Enable USB charging */ | |
1566 | dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out); | |
1567 | ||
1568 | /* Check if the requested voltage or current is valid */ | |
1569 | volt_index = ab8500_voltage_to_regval(vset); | |
861a30da | 1570 | curr_index = ab8500_current_to_regval(di, ich_out); |
84edbeea AM |
1571 | if (volt_index < 0 || curr_index < 0) { |
1572 | dev_err(di->dev, | |
1573 | "Charger voltage or current too high, " | |
1574 | "charging not started\n"); | |
1575 | return -ENXIO; | |
1576 | } | |
1577 | ||
1578 | /* ChVoltLevel: max voltage upto which battery can be charged */ | |
1579 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1580 | AB8500_CH_VOLT_LVL_REG, (u8) volt_index); | |
1581 | if (ret) { | |
1582 | dev_err(di->dev, "%s write failed\n", __func__); | |
1583 | return ret; | |
1584 | } | |
84edbeea | 1585 | /* Check if VBAT overshoot control should be enabled */ |
b0284de0 | 1586 | if (!di->bm->enable_overshoot) |
84edbeea AM |
1587 | overshoot = USB_CHG_NO_OVERSHOOT_ENA_N; |
1588 | ||
1589 | /* Enable USB Charger */ | |
34c11a70 POH |
1590 | dev_dbg(di->dev, |
1591 | "Enabling USB with write to AB8500_USBCH_CTRL1_REG\n"); | |
84edbeea AM |
1592 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
1593 | AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot); | |
1594 | if (ret) { | |
1595 | dev_err(di->dev, "%s write failed\n", __func__); | |
1596 | return ret; | |
1597 | } | |
1598 | ||
1599 | /* If success power on charging LED indication */ | |
1600 | ret = ab8500_charger_led_en(di, true); | |
1601 | if (ret < 0) | |
1602 | dev_err(di->dev, "failed to enable LED\n"); | |
1603 | ||
34c11a70 POH |
1604 | di->usb.charger_online = 1; |
1605 | ||
1606 | /* USBChInputCurr: current that can be drawn from the usb */ | |
f7470b5d LJ |
1607 | ret = ab8500_charger_set_vbus_in_curr(di, |
1608 | di->max_usb_in_curr.usb_type_max); | |
34c11a70 POH |
1609 | if (ret) { |
1610 | dev_err(di->dev, "setting USBChInputCurr failed\n"); | |
1611 | return ret; | |
1612 | } | |
1613 | ||
1614 | /* ChOutputCurentLevel: protected output current */ | |
1615 | ret = ab8500_charger_set_output_curr(di, ich_out); | |
1616 | if (ret) { | |
1617 | dev_err(di->dev, "%s " | |
1618 | "Failed to set ChOutputCurentLevel\n", | |
1619 | __func__); | |
1620 | return ret; | |
1621 | } | |
1622 | ||
84edbeea AM |
1623 | queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ); |
1624 | ||
84edbeea AM |
1625 | } else { |
1626 | /* Disable USB charging */ | |
34c11a70 | 1627 | dev_dbg(di->dev, "%s Disabled USB charging\n", __func__); |
84edbeea AM |
1628 | ret = abx500_set_register_interruptible(di->dev, |
1629 | AB8500_CHARGER, | |
1630 | AB8500_USBCH_CTRL1_REG, 0); | |
1631 | if (ret) { | |
1632 | dev_err(di->dev, | |
1633 | "%s write failed\n", __func__); | |
1634 | return ret; | |
1635 | } | |
1636 | ||
1637 | ret = ab8500_charger_led_en(di, false); | |
1638 | if (ret < 0) | |
1639 | dev_err(di->dev, "failed to disable LED\n"); | |
34c11a70 POH |
1640 | /* USBChInputCurr: current that can be drawn from the usb */ |
1641 | ret = ab8500_charger_set_vbus_in_curr(di, 0); | |
1642 | if (ret) { | |
1643 | dev_err(di->dev, "setting USBChInputCurr failed\n"); | |
1644 | return ret; | |
1645 | } | |
84edbeea | 1646 | |
34c11a70 POH |
1647 | /* ChOutputCurentLevel: protected output current */ |
1648 | ret = ab8500_charger_set_output_curr(di, 0); | |
1649 | if (ret) { | |
1650 | dev_err(di->dev, "%s " | |
1651 | "Failed to reset ChOutputCurentLevel\n", | |
1652 | __func__); | |
1653 | return ret; | |
1654 | } | |
84edbeea AM |
1655 | di->usb.charger_online = 0; |
1656 | di->usb.wd_expired = false; | |
1657 | ||
1658 | /* Disable regulator if enabled */ | |
1659 | if (di->vddadc_en_usb) { | |
1660 | regulator_disable(di->regu); | |
1661 | di->vddadc_en_usb = false; | |
1662 | } | |
1663 | ||
1664 | dev_dbg(di->dev, "%s Disabled USB charging\n", __func__); | |
1665 | ||
1666 | /* Cancel any pending Vbat check work */ | |
b09f86db | 1667 | cancel_delayed_work(&di->check_vbat_work); |
84edbeea AM |
1668 | |
1669 | } | |
297d716f | 1670 | ab8500_power_supply_changed(di, di->usb_chg.psy); |
84edbeea AM |
1671 | |
1672 | return ret; | |
1673 | } | |
1674 | ||
8891716e LJ |
1675 | static int ab8500_external_charger_prepare(struct notifier_block *charger_nb, |
1676 | unsigned long event, void *data) | |
1677 | { | |
1678 | int ret; | |
1679 | struct device *dev = data; | |
1680 | /*Toggle External charger control pin*/ | |
1681 | ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK, | |
1682 | AB8500_SYS_CHARGER_CONTROL_REG, | |
1683 | EXTERNAL_CHARGER_DISABLE_REG_VAL); | |
1684 | if (ret < 0) { | |
1685 | dev_err(dev, "write reg failed %d\n", ret); | |
1686 | goto out; | |
1687 | } | |
1688 | ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK, | |
1689 | AB8500_SYS_CHARGER_CONTROL_REG, | |
1690 | EXTERNAL_CHARGER_ENABLE_REG_VAL); | |
1691 | if (ret < 0) | |
1692 | dev_err(dev, "Write reg failed %d\n", ret); | |
1693 | ||
1694 | out: | |
1695 | return ret; | |
1696 | } | |
1697 | ||
4dcdf577 LJ |
1698 | /** |
1699 | * ab8500_charger_usb_check_enable() - enable usb charging | |
1700 | * @charger: pointer to the ux500_charger structure | |
1701 | * @vset: charging voltage | |
1702 | * @iset: charger output current | |
1703 | * | |
1704 | * Check if the VBUS charger has been disconnected and reconnected without | |
1705 | * AB8500 rising an interrupt. Returns 0 on success. | |
1706 | */ | |
1707 | static int ab8500_charger_usb_check_enable(struct ux500_charger *charger, | |
1708 | int vset, int iset) | |
1709 | { | |
1710 | u8 usbch_ctrl1 = 0; | |
1711 | int ret = 0; | |
1712 | ||
1713 | struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger); | |
1714 | ||
1715 | if (!di->usb.charger_connected) | |
1716 | return ret; | |
1717 | ||
1718 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
1719 | AB8500_USBCH_CTRL1_REG, &usbch_ctrl1); | |
1720 | if (ret < 0) { | |
1721 | dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); | |
1722 | return ret; | |
1723 | } | |
1724 | dev_dbg(di->dev, "USB charger ctrl: 0x%02x\n", usbch_ctrl1); | |
1725 | ||
1726 | if (!(usbch_ctrl1 & USB_CH_ENA)) { | |
1727 | dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n"); | |
1728 | ||
1729 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1730 | AB8500_CHARGER, AB8500_CHARGER_CTRL, | |
1731 | DROP_COUNT_RESET, DROP_COUNT_RESET); | |
1732 | if (ret < 0) { | |
1733 | dev_err(di->dev, "ab8500 write failed %d\n", __LINE__); | |
1734 | return ret; | |
1735 | } | |
1736 | ||
1737 | ret = ab8500_charger_usb_en(&di->usb_chg, true, vset, iset); | |
1738 | if (ret < 0) { | |
1739 | dev_err(di->dev, "Failed to enable VBUS charger %d\n", | |
1740 | __LINE__); | |
1741 | return ret; | |
1742 | } | |
1743 | } | |
1744 | return ret; | |
1745 | } | |
1746 | ||
1747 | /** | |
1748 | * ab8500_charger_ac_check_enable() - enable usb charging | |
1749 | * @charger: pointer to the ux500_charger structure | |
1750 | * @vset: charging voltage | |
1751 | * @iset: charger output current | |
1752 | * | |
1753 | * Check if the AC charger has been disconnected and reconnected without | |
1754 | * AB8500 rising an interrupt. Returns 0 on success. | |
1755 | */ | |
1756 | static int ab8500_charger_ac_check_enable(struct ux500_charger *charger, | |
1757 | int vset, int iset) | |
1758 | { | |
1759 | u8 mainch_ctrl1 = 0; | |
1760 | int ret = 0; | |
1761 | ||
1762 | struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger); | |
1763 | ||
1764 | if (!di->ac.charger_connected) | |
1765 | return ret; | |
1766 | ||
1767 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
1768 | AB8500_MCH_CTRL1, &mainch_ctrl1); | |
1769 | if (ret < 0) { | |
1770 | dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); | |
1771 | return ret; | |
1772 | } | |
1773 | dev_dbg(di->dev, "AC charger ctrl: 0x%02x\n", mainch_ctrl1); | |
1774 | ||
1775 | if (!(mainch_ctrl1 & MAIN_CH_ENA)) { | |
1776 | dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n"); | |
1777 | ||
1778 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1779 | AB8500_CHARGER, AB8500_CHARGER_CTRL, | |
1780 | DROP_COUNT_RESET, DROP_COUNT_RESET); | |
1781 | ||
1782 | if (ret < 0) { | |
1783 | dev_err(di->dev, "ab8500 write failed %d\n", __LINE__); | |
1784 | return ret; | |
1785 | } | |
1786 | ||
1787 | ret = ab8500_charger_ac_en(&di->usb_chg, true, vset, iset); | |
1788 | if (ret < 0) { | |
1789 | dev_err(di->dev, "failed to enable AC charger %d\n", | |
1790 | __LINE__); | |
1791 | return ret; | |
1792 | } | |
1793 | } | |
1794 | return ret; | |
1795 | } | |
1796 | ||
84edbeea AM |
1797 | /** |
1798 | * ab8500_charger_watchdog_kick() - kick charger watchdog | |
1799 | * @di: pointer to the ab8500_charger structure | |
1800 | * | |
1801 | * Kick charger watchdog | |
1802 | * Returns error code in case of failure else 0(on success) | |
1803 | */ | |
1804 | static int ab8500_charger_watchdog_kick(struct ux500_charger *charger) | |
1805 | { | |
1806 | int ret; | |
1807 | struct ab8500_charger *di; | |
1808 | ||
297d716f | 1809 | if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS) |
84edbeea | 1810 | di = to_ab8500_charger_ac_device_info(charger); |
297d716f | 1811 | else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB) |
84edbeea AM |
1812 | di = to_ab8500_charger_usb_device_info(charger); |
1813 | else | |
1814 | return -ENXIO; | |
1815 | ||
1816 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1817 | AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); | |
1818 | if (ret) | |
1819 | dev_err(di->dev, "Failed to kick WD!\n"); | |
1820 | ||
1821 | return ret; | |
1822 | } | |
1823 | ||
1824 | /** | |
1825 | * ab8500_charger_update_charger_current() - update charger current | |
1826 | * @di: pointer to the ab8500_charger structure | |
1827 | * | |
1828 | * Update the charger output current for the specified charger | |
1829 | * Returns error code in case of failure else 0(on success) | |
1830 | */ | |
1831 | static int ab8500_charger_update_charger_current(struct ux500_charger *charger, | |
1832 | int ich_out) | |
1833 | { | |
1834 | int ret; | |
84edbeea AM |
1835 | struct ab8500_charger *di; |
1836 | ||
297d716f | 1837 | if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS) |
84edbeea | 1838 | di = to_ab8500_charger_ac_device_info(charger); |
297d716f | 1839 | else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB) |
84edbeea AM |
1840 | di = to_ab8500_charger_usb_device_info(charger); |
1841 | else | |
1842 | return -ENXIO; | |
1843 | ||
f8e96dff | 1844 | ret = ab8500_charger_set_output_curr(di, ich_out); |
84edbeea | 1845 | if (ret) { |
f8e96dff JB |
1846 | dev_err(di->dev, "%s " |
1847 | "Failed to set ChOutputCurentLevel\n", | |
1848 | __func__); | |
84edbeea AM |
1849 | return ret; |
1850 | } | |
1851 | ||
1852 | /* Reset the main and usb drop input current measurement counter */ | |
1853 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
4dcdf577 | 1854 | AB8500_CHARGER_CTRL, DROP_COUNT_RESET); |
84edbeea AM |
1855 | if (ret) { |
1856 | dev_err(di->dev, "%s write failed\n", __func__); | |
1857 | return ret; | |
1858 | } | |
1859 | ||
1860 | return ret; | |
1861 | } | |
1862 | ||
1863 | static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data) | |
1864 | { | |
1865 | struct power_supply *psy; | |
ea32cea1 AS |
1866 | struct power_supply *ext = dev_get_drvdata(dev); |
1867 | const char **supplicants = (const char **)ext->supplied_to; | |
84edbeea AM |
1868 | struct ab8500_charger *di; |
1869 | union power_supply_propval ret; | |
ea32cea1 | 1870 | int j; |
84edbeea AM |
1871 | struct ux500_charger *usb_chg; |
1872 | ||
1873 | usb_chg = (struct ux500_charger *)data; | |
297d716f | 1874 | psy = usb_chg->psy; |
84edbeea AM |
1875 | |
1876 | di = to_ab8500_charger_usb_device_info(usb_chg); | |
1877 | ||
84edbeea | 1878 | /* For all psy where the driver name appears in any supplied_to */ |
ea32cea1 AS |
1879 | j = match_string(supplicants, ext->num_supplicants, psy->desc->name); |
1880 | if (j < 0) | |
84edbeea AM |
1881 | return 0; |
1882 | ||
1883 | /* Go through all properties for the psy */ | |
297d716f | 1884 | for (j = 0; j < ext->desc->num_properties; j++) { |
84edbeea | 1885 | enum power_supply_property prop; |
297d716f | 1886 | prop = ext->desc->properties[j]; |
84edbeea | 1887 | |
15077fc1 | 1888 | if (power_supply_get_property(ext, prop, &ret)) |
84edbeea AM |
1889 | continue; |
1890 | ||
1891 | switch (prop) { | |
1892 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
297d716f | 1893 | switch (ext->desc->type) { |
84edbeea AM |
1894 | case POWER_SUPPLY_TYPE_BATTERY: |
1895 | di->vbat = ret.intval / 1000; | |
1896 | break; | |
1897 | default: | |
1898 | break; | |
1899 | } | |
1900 | break; | |
1901 | default: | |
1902 | break; | |
1903 | } | |
1904 | } | |
1905 | return 0; | |
1906 | } | |
1907 | ||
1908 | /** | |
1909 | * ab8500_charger_check_vbat_work() - keep vbus current within spec | |
1910 | * @work pointer to the work_struct structure | |
1911 | * | |
1912 | * Due to a asic bug it is necessary to lower the input current to the vbus | |
1913 | * charger when charging with at some specific levels. This issue is only valid | |
1914 | * for below a certain battery voltage. This function makes sure that the | |
1915 | * the allowed current limit isn't exceeded. | |
1916 | */ | |
1917 | static void ab8500_charger_check_vbat_work(struct work_struct *work) | |
1918 | { | |
1919 | int t = 10; | |
1920 | struct ab8500_charger *di = container_of(work, | |
1921 | struct ab8500_charger, check_vbat_work.work); | |
1922 | ||
1923 | class_for_each_device(power_supply_class, NULL, | |
297d716f | 1924 | di->usb_chg.psy, ab8500_charger_get_ext_psy_data); |
84edbeea AM |
1925 | |
1926 | /* First run old_vbat is 0. */ | |
1927 | if (di->old_vbat == 0) | |
1928 | di->old_vbat = di->vbat; | |
1929 | ||
1930 | if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED && | |
1931 | di->vbat <= VBAT_TRESH_IP_CUR_RED) || | |
1932 | (di->old_vbat > VBAT_TRESH_IP_CUR_RED && | |
1933 | di->vbat > VBAT_TRESH_IP_CUR_RED))) { | |
1934 | ||
1935 | dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d," | |
f7470b5d LJ |
1936 | " old: %d\n", di->max_usb_in_curr.usb_type_max, |
1937 | di->vbat, di->old_vbat); | |
1938 | ab8500_charger_set_vbus_in_curr(di, | |
1939 | di->max_usb_in_curr.usb_type_max); | |
297d716f | 1940 | power_supply_changed(di->usb_chg.psy); |
84edbeea AM |
1941 | } |
1942 | ||
1943 | di->old_vbat = di->vbat; | |
1944 | ||
1945 | /* | |
1946 | * No need to check the battery voltage every second when not close to | |
1947 | * the threshold. | |
1948 | */ | |
1949 | if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) && | |
1950 | (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100))) | |
1951 | t = 1; | |
1952 | ||
1953 | queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ); | |
1954 | } | |
1955 | ||
1956 | /** | |
1957 | * ab8500_charger_check_hw_failure_work() - check main charger failure | |
1958 | * @work: pointer to the work_struct structure | |
1959 | * | |
1960 | * Work queue function for checking the main charger status | |
1961 | */ | |
1962 | static void ab8500_charger_check_hw_failure_work(struct work_struct *work) | |
1963 | { | |
1964 | int ret; | |
1965 | u8 reg_value; | |
1966 | ||
1967 | struct ab8500_charger *di = container_of(work, | |
1968 | struct ab8500_charger, check_hw_failure_work.work); | |
1969 | ||
1970 | /* Check if the status bits for HW failure is still active */ | |
1971 | if (di->flags.mainextchnotok) { | |
1972 | ret = abx500_get_register_interruptible(di->dev, | |
1973 | AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value); | |
1974 | if (ret < 0) { | |
1975 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1976 | return; | |
1977 | } | |
1978 | if (!(reg_value & MAIN_CH_NOK)) { | |
1979 | di->flags.mainextchnotok = false; | |
297d716f | 1980 | ab8500_power_supply_changed(di, di->ac_chg.psy); |
84edbeea AM |
1981 | } |
1982 | } | |
1983 | if (di->flags.vbus_ovv) { | |
1984 | ret = abx500_get_register_interruptible(di->dev, | |
1985 | AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, | |
1986 | ®_value); | |
1987 | if (ret < 0) { | |
1988 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1989 | return; | |
1990 | } | |
1991 | if (!(reg_value & VBUS_OVV_TH)) { | |
1992 | di->flags.vbus_ovv = false; | |
297d716f | 1993 | ab8500_power_supply_changed(di, di->usb_chg.psy); |
84edbeea AM |
1994 | } |
1995 | } | |
1996 | /* If we still have a failure, schedule a new check */ | |
1997 | if (di->flags.mainextchnotok || di->flags.vbus_ovv) { | |
1998 | queue_delayed_work(di->charger_wq, | |
1999 | &di->check_hw_failure_work, round_jiffies(HZ)); | |
2000 | } | |
2001 | } | |
2002 | ||
2003 | /** | |
2004 | * ab8500_charger_kick_watchdog_work() - kick the watchdog | |
2005 | * @work: pointer to the work_struct structure | |
2006 | * | |
2007 | * Work queue function for kicking the charger watchdog. | |
2008 | * | |
2009 | * For ABB revision 1.0 and 1.1 there is a bug in the watchdog | |
2010 | * logic. That means we have to continously kick the charger | |
2011 | * watchdog even when no charger is connected. This is only | |
2012 | * valid once the AC charger has been enabled. This is | |
2013 | * a bug that is not handled by the algorithm and the | |
2014 | * watchdog have to be kicked by the charger driver | |
2015 | * when the AC charger is disabled | |
2016 | */ | |
2017 | static void ab8500_charger_kick_watchdog_work(struct work_struct *work) | |
2018 | { | |
2019 | int ret; | |
2020 | ||
2021 | struct ab8500_charger *di = container_of(work, | |
2022 | struct ab8500_charger, kick_wd_work.work); | |
2023 | ||
2024 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
2025 | AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); | |
2026 | if (ret) | |
2027 | dev_err(di->dev, "Failed to kick WD!\n"); | |
2028 | ||
2029 | /* Schedule a new watchdog kick */ | |
2030 | queue_delayed_work(di->charger_wq, | |
2031 | &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL)); | |
2032 | } | |
2033 | ||
2034 | /** | |
2035 | * ab8500_charger_ac_work() - work to get and set main charger status | |
2036 | * @work: pointer to the work_struct structure | |
2037 | * | |
2038 | * Work queue function for checking the main charger status | |
2039 | */ | |
2040 | static void ab8500_charger_ac_work(struct work_struct *work) | |
2041 | { | |
2042 | int ret; | |
2043 | ||
2044 | struct ab8500_charger *di = container_of(work, | |
2045 | struct ab8500_charger, ac_work); | |
2046 | ||
2047 | /* | |
2048 | * Since we can't be sure that the events are received | |
2049 | * synchronously, we have the check if the main charger is | |
2050 | * connected by reading the status register | |
2051 | */ | |
34c11a70 | 2052 | ret = ab8500_charger_detect_chargers(di, false); |
84edbeea AM |
2053 | if (ret < 0) |
2054 | return; | |
2055 | ||
2056 | if (ret & AC_PW_CONN) { | |
2057 | di->ac.charger_connected = 1; | |
2058 | di->ac_conn = true; | |
2059 | } else { | |
2060 | di->ac.charger_connected = 0; | |
2061 | } | |
2062 | ||
297d716f KK |
2063 | ab8500_power_supply_changed(di, di->ac_chg.psy); |
2064 | sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present"); | |
84edbeea AM |
2065 | } |
2066 | ||
b269fff4 LJ |
2067 | static void ab8500_charger_usb_attached_work(struct work_struct *work) |
2068 | { | |
2069 | struct ab8500_charger *di = container_of(work, | |
2070 | struct ab8500_charger, | |
2071 | usb_charger_attached_work.work); | |
2072 | int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC); | |
2073 | int ret, i; | |
2074 | u8 statval; | |
2075 | ||
2076 | for (i = 0; i < 10; i++) { | |
2077 | ret = abx500_get_register_interruptible(di->dev, | |
2078 | AB8500_CHARGER, | |
2079 | AB8500_CH_USBCH_STAT1_REG, | |
2080 | &statval); | |
2081 | if (ret < 0) { | |
2082 | dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); | |
2083 | goto reschedule; | |
2084 | } | |
2085 | if ((statval & usbch) != usbch) | |
2086 | goto reschedule; | |
2087 | ||
2088 | msleep(CHARGER_STATUS_POLL); | |
2089 | } | |
2090 | ||
2091 | ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0); | |
2092 | ||
2093 | mutex_lock(&di->charger_attached_mutex); | |
2094 | mutex_unlock(&di->charger_attached_mutex); | |
2095 | ||
2096 | return; | |
2097 | ||
2098 | reschedule: | |
2099 | queue_delayed_work(di->charger_wq, | |
2100 | &di->usb_charger_attached_work, | |
2101 | HZ); | |
2102 | } | |
2103 | ||
2104 | static void ab8500_charger_ac_attached_work(struct work_struct *work) | |
2105 | { | |
2106 | ||
2107 | struct ab8500_charger *di = container_of(work, | |
2108 | struct ab8500_charger, | |
2109 | ac_charger_attached_work.work); | |
2110 | int mainch = (MAIN_CH_STATUS2_MAINCHGDROP | | |
2111 | MAIN_CH_STATUS2_MAINCHARGERDETDBNC); | |
2112 | int ret, i; | |
2113 | u8 statval; | |
2114 | ||
2115 | for (i = 0; i < 10; i++) { | |
2116 | ret = abx500_get_register_interruptible(di->dev, | |
2117 | AB8500_CHARGER, | |
2118 | AB8500_CH_STATUS2_REG, | |
2119 | &statval); | |
2120 | if (ret < 0) { | |
2121 | dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); | |
2122 | goto reschedule; | |
2123 | } | |
2124 | ||
2125 | if ((statval & mainch) != mainch) | |
2126 | goto reschedule; | |
2127 | ||
2128 | msleep(CHARGER_STATUS_POLL); | |
2129 | } | |
2130 | ||
2131 | ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0); | |
2132 | queue_work(di->charger_wq, &di->ac_work); | |
2133 | ||
2134 | mutex_lock(&di->charger_attached_mutex); | |
2135 | mutex_unlock(&di->charger_attached_mutex); | |
2136 | ||
2137 | return; | |
2138 | ||
2139 | reschedule: | |
2140 | queue_delayed_work(di->charger_wq, | |
2141 | &di->ac_charger_attached_work, | |
2142 | HZ); | |
2143 | } | |
2144 | ||
84edbeea AM |
2145 | /** |
2146 | * ab8500_charger_detect_usb_type_work() - work to detect USB type | |
2147 | * @work: Pointer to the work_struct structure | |
2148 | * | |
2149 | * Detect the type of USB plugged | |
2150 | */ | |
64eb9b02 | 2151 | static void ab8500_charger_detect_usb_type_work(struct work_struct *work) |
84edbeea AM |
2152 | { |
2153 | int ret; | |
2154 | ||
2155 | struct ab8500_charger *di = container_of(work, | |
2156 | struct ab8500_charger, detect_usb_type_work); | |
2157 | ||
2158 | /* | |
2159 | * Since we can't be sure that the events are received | |
2160 | * synchronously, we have the check if is | |
2161 | * connected by reading the status register | |
2162 | */ | |
34c11a70 | 2163 | ret = ab8500_charger_detect_chargers(di, false); |
84edbeea AM |
2164 | if (ret < 0) |
2165 | return; | |
2166 | ||
2167 | if (!(ret & USB_PW_CONN)) { | |
34c11a70 POH |
2168 | dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__); |
2169 | di->vbus_detected = false; | |
84edbeea | 2170 | ab8500_charger_set_usb_connected(di, false); |
297d716f | 2171 | ab8500_power_supply_changed(di, di->usb_chg.psy); |
84edbeea | 2172 | } else { |
34c11a70 POH |
2173 | dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__); |
2174 | di->vbus_detected = true; | |
84edbeea AM |
2175 | |
2176 | if (is_ab8500_1p1_or_earlier(di->parent)) { | |
2177 | ret = ab8500_charger_detect_usb_type(di); | |
2178 | if (!ret) { | |
2179 | ab8500_charger_set_usb_connected(di, true); | |
2180 | ab8500_power_supply_changed(di, | |
297d716f | 2181 | di->usb_chg.psy); |
84edbeea AM |
2182 | } |
2183 | } else { | |
34c11a70 POH |
2184 | /* |
2185 | * For ABB cut2.0 and onwards we have an IRQ, | |
84edbeea AM |
2186 | * USB_LINK_STATUS that will be triggered when the USB |
2187 | * link status changes. The exception is USB connected | |
2188 | * during startup. Then we don't get a | |
2189 | * USB_LINK_STATUS IRQ | |
2190 | */ | |
2191 | if (di->vbus_detected_start) { | |
2192 | di->vbus_detected_start = false; | |
2193 | ret = ab8500_charger_detect_usb_type(di); | |
2194 | if (!ret) { | |
2195 | ab8500_charger_set_usb_connected(di, | |
2196 | true); | |
2197 | ab8500_power_supply_changed(di, | |
297d716f | 2198 | di->usb_chg.psy); |
84edbeea AM |
2199 | } |
2200 | } | |
2201 | } | |
2202 | } | |
2203 | } | |
2204 | ||
4b45f4a9 | 2205 | /** |
34c11a70 | 2206 | * ab8500_charger_usb_link_attach_work() - work to detect USB type |
4b45f4a9 MC |
2207 | * @work: pointer to the work_struct structure |
2208 | * | |
2209 | * Detect the type of USB plugged | |
2210 | */ | |
2211 | static void ab8500_charger_usb_link_attach_work(struct work_struct *work) | |
2212 | { | |
2213 | struct ab8500_charger *di = | |
2214 | container_of(work, struct ab8500_charger, attach_work.work); | |
2215 | int ret; | |
2216 | ||
2217 | /* Update maximum input current if USB enumeration is not detected */ | |
2218 | if (!di->usb.charger_online) { | |
f7470b5d LJ |
2219 | ret = ab8500_charger_set_vbus_in_curr(di, |
2220 | di->max_usb_in_curr.usb_type_max); | |
4b45f4a9 MC |
2221 | if (ret) |
2222 | return; | |
2223 | } | |
2224 | ||
2225 | ab8500_charger_set_usb_connected(di, true); | |
297d716f | 2226 | ab8500_power_supply_changed(di, di->usb_chg.psy); |
4b45f4a9 MC |
2227 | } |
2228 | ||
84edbeea AM |
2229 | /** |
2230 | * ab8500_charger_usb_link_status_work() - work to detect USB type | |
2231 | * @work: pointer to the work_struct structure | |
2232 | * | |
2233 | * Detect the type of USB plugged | |
2234 | */ | |
2235 | static void ab8500_charger_usb_link_status_work(struct work_struct *work) | |
2236 | { | |
ff38090a | 2237 | int detected_chargers; |
84edbeea | 2238 | int ret; |
ff38090a | 2239 | u8 val; |
d4337660 | 2240 | u8 link_status; |
84edbeea AM |
2241 | |
2242 | struct ab8500_charger *di = container_of(work, | |
2243 | struct ab8500_charger, usb_link_status_work); | |
2244 | ||
2245 | /* | |
2246 | * Since we can't be sure that the events are received | |
2247 | * synchronously, we have the check if is | |
2248 | * connected by reading the status register | |
2249 | */ | |
34c11a70 | 2250 | detected_chargers = ab8500_charger_detect_chargers(di, false); |
ff38090a | 2251 | if (detected_chargers < 0) |
84edbeea AM |
2252 | return; |
2253 | ||
ff38090a HS |
2254 | /* |
2255 | * Some chargers that breaks the USB spec is | |
2256 | * identified as invalid by AB8500 and it refuse | |
2257 | * to start the charging process. but by jumping | |
2258 | * thru a few hoops it can be forced to start. | |
2259 | */ | |
88efdb80 MC |
2260 | if (is_ab8500(di->parent)) |
2261 | ret = abx500_get_register_interruptible(di->dev, AB8500_USB, | |
2262 | AB8500_USB_LINE_STAT_REG, &val); | |
2263 | else | |
2264 | ret = abx500_get_register_interruptible(di->dev, AB8500_USB, | |
2265 | AB8500_USB_LINK1_STAT_REG, &val); | |
2266 | ||
ff38090a HS |
2267 | if (ret >= 0) |
2268 | dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val); | |
2269 | else | |
2270 | dev_dbg(di->dev, "Error reading USB link status\n"); | |
2271 | ||
861a30da | 2272 | if (is_ab8500(di->parent)) |
d4337660 | 2273 | link_status = AB8500_USB_LINK_STATUS; |
861a30da LJ |
2274 | else |
2275 | link_status = AB8505_USB_LINK_STATUS; | |
d4337660 | 2276 | |
ff38090a | 2277 | if (detected_chargers & USB_PW_CONN) { |
861a30da LJ |
2278 | if (((val & link_status) >> USB_LINK_STATUS_SHIFT) == |
2279 | USB_STAT_NOT_VALID_LINK && | |
ff38090a | 2280 | di->invalid_charger_detect_state == 0) { |
861a30da LJ |
2281 | dev_dbg(di->dev, |
2282 | "Invalid charger detected, state= 0\n"); | |
ff38090a HS |
2283 | /*Enable charger*/ |
2284 | abx500_mask_and_set_register_interruptible(di->dev, | |
861a30da LJ |
2285 | AB8500_CHARGER, AB8500_USBCH_CTRL1_REG, |
2286 | USB_CH_ENA, USB_CH_ENA); | |
ff38090a | 2287 | /*Enable charger detection*/ |
b3ea5f45 MC |
2288 | abx500_mask_and_set_register_interruptible(di->dev, |
2289 | AB8500_USB, AB8500_USB_LINE_CTRL2_REG, | |
2290 | USB_CH_DET, USB_CH_DET); | |
ff38090a HS |
2291 | di->invalid_charger_detect_state = 1; |
2292 | /*exit and wait for new link status interrupt.*/ | |
2293 | return; | |
2294 | ||
2295 | } | |
2296 | if (di->invalid_charger_detect_state == 1) { | |
861a30da LJ |
2297 | dev_dbg(di->dev, |
2298 | "Invalid charger detected, state= 1\n"); | |
ff38090a | 2299 | /*Stop charger detection*/ |
b3ea5f45 MC |
2300 | abx500_mask_and_set_register_interruptible(di->dev, |
2301 | AB8500_USB, AB8500_USB_LINE_CTRL2_REG, | |
2302 | USB_CH_DET, 0x00); | |
ff38090a | 2303 | /*Check link status*/ |
88efdb80 MC |
2304 | if (is_ab8500(di->parent)) |
2305 | ret = abx500_get_register_interruptible(di->dev, | |
2306 | AB8500_USB, AB8500_USB_LINE_STAT_REG, | |
2307 | &val); | |
2308 | else | |
2309 | ret = abx500_get_register_interruptible(di->dev, | |
2310 | AB8500_USB, AB8500_USB_LINK1_STAT_REG, | |
2311 | &val); | |
2312 | ||
ff38090a | 2313 | dev_dbg(di->dev, "USB link status= 0x%02x\n", |
861a30da | 2314 | (val & link_status) >> USB_LINK_STATUS_SHIFT); |
ff38090a HS |
2315 | di->invalid_charger_detect_state = 2; |
2316 | } | |
2317 | } else { | |
2318 | di->invalid_charger_detect_state = 0; | |
2319 | } | |
2320 | ||
2321 | if (!(detected_chargers & USB_PW_CONN)) { | |
34c11a70 | 2322 | di->vbus_detected = false; |
84edbeea | 2323 | ab8500_charger_set_usb_connected(di, false); |
297d716f | 2324 | ab8500_power_supply_changed(di, di->usb_chg.psy); |
4b45f4a9 MC |
2325 | return; |
2326 | } | |
84edbeea | 2327 | |
34c11a70 POH |
2328 | dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__); |
2329 | di->vbus_detected = true; | |
4b45f4a9 | 2330 | ret = ab8500_charger_read_usb_type(di); |
34c11a70 POH |
2331 | if (ret) { |
2332 | if (ret == -ENXIO) { | |
2333 | /* No valid charger type detected */ | |
2334 | ab8500_charger_set_usb_connected(di, false); | |
297d716f | 2335 | ab8500_power_supply_changed(di, di->usb_chg.psy); |
84edbeea | 2336 | } |
34c11a70 POH |
2337 | return; |
2338 | } | |
2339 | ||
2340 | if (di->usb_device_is_unrecognised) { | |
2341 | dev_dbg(di->dev, | |
2342 | "Potential Legacy Charger device. " | |
2343 | "Delay work for %d msec for USB enum " | |
2344 | "to finish", | |
2345 | WAIT_ACA_RID_ENUMERATION); | |
2346 | queue_delayed_work(di->charger_wq, | |
2347 | &di->attach_work, | |
2348 | msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION)); | |
2349 | } else if (di->is_aca_rid == 1) { | |
2350 | /* Only wait once */ | |
2351 | di->is_aca_rid++; | |
2352 | dev_dbg(di->dev, | |
2353 | "%s Wait %d msec for USB enum to finish", | |
2354 | __func__, WAIT_ACA_RID_ENUMERATION); | |
2355 | queue_delayed_work(di->charger_wq, | |
2356 | &di->attach_work, | |
2357 | msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION)); | |
2358 | } else { | |
2359 | queue_delayed_work(di->charger_wq, | |
2360 | &di->attach_work, | |
2361 | 0); | |
84edbeea AM |
2362 | } |
2363 | } | |
2364 | ||
2365 | static void ab8500_charger_usb_state_changed_work(struct work_struct *work) | |
2366 | { | |
2367 | int ret; | |
2368 | unsigned long flags; | |
2369 | ||
2370 | struct ab8500_charger *di = container_of(work, | |
34c11a70 | 2371 | struct ab8500_charger, usb_state_changed_work.work); |
84edbeea | 2372 | |
34c11a70 POH |
2373 | if (!di->vbus_detected) { |
2374 | dev_dbg(di->dev, | |
2375 | "%s !di->vbus_detected\n", | |
2376 | __func__); | |
84edbeea | 2377 | return; |
34c11a70 | 2378 | } |
84edbeea AM |
2379 | |
2380 | spin_lock_irqsave(&di->usb_state.usb_lock, flags); | |
34c11a70 POH |
2381 | di->usb_state.state = di->usb_state.state_tmp; |
2382 | di->usb_state.usb_current = di->usb_state.usb_current_tmp; | |
84edbeea AM |
2383 | spin_unlock_irqrestore(&di->usb_state.usb_lock, flags); |
2384 | ||
84edbeea AM |
2385 | dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n", |
2386 | __func__, di->usb_state.state, di->usb_state.usb_current); | |
2387 | ||
2388 | switch (di->usb_state.state) { | |
2389 | case AB8500_BM_USB_STATE_RESET_HS: | |
2390 | case AB8500_BM_USB_STATE_RESET_FS: | |
2391 | case AB8500_BM_USB_STATE_SUSPEND: | |
2392 | case AB8500_BM_USB_STATE_MAX: | |
2393 | ab8500_charger_set_usb_connected(di, false); | |
297d716f | 2394 | ab8500_power_supply_changed(di, di->usb_chg.psy); |
84edbeea AM |
2395 | break; |
2396 | ||
2397 | case AB8500_BM_USB_STATE_RESUME: | |
2398 | /* | |
2399 | * when suspend->resume there should be delay | |
2400 | * of 1sec for enabling charging | |
2401 | */ | |
2402 | msleep(1000); | |
2403 | /* Intentional fall through */ | |
2404 | case AB8500_BM_USB_STATE_CONFIGURED: | |
2405 | /* | |
2406 | * USB is configured, enable charging with the charging | |
2407 | * input current obtained from USB driver | |
2408 | */ | |
2409 | if (!ab8500_charger_get_usb_cur(di)) { | |
2410 | /* Update maximum input current */ | |
2411 | ret = ab8500_charger_set_vbus_in_curr(di, | |
f7470b5d | 2412 | di->max_usb_in_curr.usb_type_max); |
84edbeea AM |
2413 | if (ret) |
2414 | return; | |
2415 | ||
2416 | ab8500_charger_set_usb_connected(di, true); | |
297d716f | 2417 | ab8500_power_supply_changed(di, di->usb_chg.psy); |
84edbeea AM |
2418 | } |
2419 | break; | |
2420 | ||
2421 | default: | |
2422 | break; | |
2423 | }; | |
2424 | } | |
2425 | ||
2426 | /** | |
2427 | * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status | |
2428 | * @work: pointer to the work_struct structure | |
2429 | * | |
2430 | * Work queue function for checking the USB charger Not OK status | |
2431 | */ | |
2432 | static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work) | |
2433 | { | |
2434 | int ret; | |
2435 | u8 reg_value; | |
2436 | bool prev_status; | |
2437 | ||
2438 | struct ab8500_charger *di = container_of(work, | |
2439 | struct ab8500_charger, check_usbchgnotok_work.work); | |
2440 | ||
2441 | /* Check if the status bit for usbchargernotok is still active */ | |
2442 | ret = abx500_get_register_interruptible(di->dev, | |
2443 | AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value); | |
2444 | if (ret < 0) { | |
2445 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
2446 | return; | |
2447 | } | |
2448 | prev_status = di->flags.usbchargernotok; | |
2449 | ||
2450 | if (reg_value & VBUS_CH_NOK) { | |
2451 | di->flags.usbchargernotok = true; | |
2452 | /* Check again in 1sec */ | |
2453 | queue_delayed_work(di->charger_wq, | |
2454 | &di->check_usbchgnotok_work, HZ); | |
2455 | } else { | |
2456 | di->flags.usbchargernotok = false; | |
2457 | di->flags.vbus_collapse = false; | |
2458 | } | |
2459 | ||
2460 | if (prev_status != di->flags.usbchargernotok) | |
297d716f | 2461 | ab8500_power_supply_changed(di, di->usb_chg.psy); |
84edbeea AM |
2462 | } |
2463 | ||
2464 | /** | |
2465 | * ab8500_charger_check_main_thermal_prot_work() - check main thermal status | |
2466 | * @work: pointer to the work_struct structure | |
2467 | * | |
2468 | * Work queue function for checking the Main thermal prot status | |
2469 | */ | |
2470 | static void ab8500_charger_check_main_thermal_prot_work( | |
2471 | struct work_struct *work) | |
2472 | { | |
2473 | int ret; | |
2474 | u8 reg_value; | |
2475 | ||
2476 | struct ab8500_charger *di = container_of(work, | |
2477 | struct ab8500_charger, check_main_thermal_prot_work); | |
2478 | ||
2479 | /* Check if the status bit for main_thermal_prot is still active */ | |
2480 | ret = abx500_get_register_interruptible(di->dev, | |
2481 | AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value); | |
2482 | if (ret < 0) { | |
2483 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
2484 | return; | |
2485 | } | |
2486 | if (reg_value & MAIN_CH_TH_PROT) | |
2487 | di->flags.main_thermal_prot = true; | |
2488 | else | |
2489 | di->flags.main_thermal_prot = false; | |
2490 | ||
297d716f | 2491 | ab8500_power_supply_changed(di, di->ac_chg.psy); |
84edbeea AM |
2492 | } |
2493 | ||
2494 | /** | |
2495 | * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status | |
2496 | * @work: pointer to the work_struct structure | |
2497 | * | |
2498 | * Work queue function for checking the USB thermal prot status | |
2499 | */ | |
2500 | static void ab8500_charger_check_usb_thermal_prot_work( | |
2501 | struct work_struct *work) | |
2502 | { | |
2503 | int ret; | |
2504 | u8 reg_value; | |
2505 | ||
2506 | struct ab8500_charger *di = container_of(work, | |
2507 | struct ab8500_charger, check_usb_thermal_prot_work); | |
2508 | ||
2509 | /* Check if the status bit for usb_thermal_prot is still active */ | |
2510 | ret = abx500_get_register_interruptible(di->dev, | |
2511 | AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value); | |
2512 | if (ret < 0) { | |
2513 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
2514 | return; | |
2515 | } | |
2516 | if (reg_value & USB_CH_TH_PROT) | |
2517 | di->flags.usb_thermal_prot = true; | |
2518 | else | |
2519 | di->flags.usb_thermal_prot = false; | |
2520 | ||
297d716f | 2521 | ab8500_power_supply_changed(di, di->usb_chg.psy); |
84edbeea AM |
2522 | } |
2523 | ||
2524 | /** | |
2525 | * ab8500_charger_mainchunplugdet_handler() - main charger unplugged | |
2526 | * @irq: interrupt number | |
2527 | * @_di: pointer to the ab8500_charger structure | |
2528 | * | |
2529 | * Returns IRQ status(IRQ_HANDLED) | |
2530 | */ | |
2531 | static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di) | |
2532 | { | |
2533 | struct ab8500_charger *di = _di; | |
2534 | ||
2535 | dev_dbg(di->dev, "Main charger unplugged\n"); | |
2536 | queue_work(di->charger_wq, &di->ac_work); | |
2537 | ||
b269fff4 LJ |
2538 | cancel_delayed_work_sync(&di->ac_charger_attached_work); |
2539 | mutex_lock(&di->charger_attached_mutex); | |
2540 | mutex_unlock(&di->charger_attached_mutex); | |
2541 | ||
84edbeea AM |
2542 | return IRQ_HANDLED; |
2543 | } | |
2544 | ||
2545 | /** | |
2546 | * ab8500_charger_mainchplugdet_handler() - main charger plugged | |
2547 | * @irq: interrupt number | |
2548 | * @_di: pointer to the ab8500_charger structure | |
2549 | * | |
2550 | * Returns IRQ status(IRQ_HANDLED) | |
2551 | */ | |
2552 | static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di) | |
2553 | { | |
2554 | struct ab8500_charger *di = _di; | |
2555 | ||
2556 | dev_dbg(di->dev, "Main charger plugged\n"); | |
2557 | queue_work(di->charger_wq, &di->ac_work); | |
2558 | ||
b269fff4 LJ |
2559 | mutex_lock(&di->charger_attached_mutex); |
2560 | mutex_unlock(&di->charger_attached_mutex); | |
261c5136 RV |
2561 | |
2562 | if (is_ab8500(di->parent)) | |
2563 | queue_delayed_work(di->charger_wq, | |
b269fff4 LJ |
2564 | &di->ac_charger_attached_work, |
2565 | HZ); | |
84edbeea AM |
2566 | return IRQ_HANDLED; |
2567 | } | |
2568 | ||
2569 | /** | |
2570 | * ab8500_charger_mainextchnotok_handler() - main charger not ok | |
2571 | * @irq: interrupt number | |
2572 | * @_di: pointer to the ab8500_charger structure | |
2573 | * | |
2574 | * Returns IRQ status(IRQ_HANDLED) | |
2575 | */ | |
2576 | static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di) | |
2577 | { | |
2578 | struct ab8500_charger *di = _di; | |
2579 | ||
2580 | dev_dbg(di->dev, "Main charger not ok\n"); | |
2581 | di->flags.mainextchnotok = true; | |
297d716f | 2582 | ab8500_power_supply_changed(di, di->ac_chg.psy); |
84edbeea AM |
2583 | |
2584 | /* Schedule a new HW failure check */ | |
2585 | queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); | |
2586 | ||
2587 | return IRQ_HANDLED; | |
2588 | } | |
2589 | ||
2590 | /** | |
2591 | * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger | |
2592 | * thermal protection threshold | |
2593 | * @irq: interrupt number | |
2594 | * @_di: pointer to the ab8500_charger structure | |
2595 | * | |
2596 | * Returns IRQ status(IRQ_HANDLED) | |
2597 | */ | |
2598 | static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di) | |
2599 | { | |
2600 | struct ab8500_charger *di = _di; | |
2601 | ||
2602 | dev_dbg(di->dev, | |
2603 | "Die temp above Main charger thermal protection threshold\n"); | |
2604 | queue_work(di->charger_wq, &di->check_main_thermal_prot_work); | |
2605 | ||
2606 | return IRQ_HANDLED; | |
2607 | } | |
2608 | ||
2609 | /** | |
2610 | * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger | |
2611 | * thermal protection threshold | |
2612 | * @irq: interrupt number | |
2613 | * @_di: pointer to the ab8500_charger structure | |
2614 | * | |
2615 | * Returns IRQ status(IRQ_HANDLED) | |
2616 | */ | |
2617 | static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di) | |
2618 | { | |
2619 | struct ab8500_charger *di = _di; | |
2620 | ||
2621 | dev_dbg(di->dev, | |
2622 | "Die temp ok for Main charger thermal protection threshold\n"); | |
2623 | queue_work(di->charger_wq, &di->check_main_thermal_prot_work); | |
2624 | ||
2625 | return IRQ_HANDLED; | |
2626 | } | |
2627 | ||
34c11a70 POH |
2628 | static void ab8500_charger_vbus_drop_end_work(struct work_struct *work) |
2629 | { | |
2630 | struct ab8500_charger *di = container_of(work, | |
2631 | struct ab8500_charger, vbus_drop_end_work.work); | |
861a30da | 2632 | int ret, curr; |
f7470b5d | 2633 | u8 reg_value; |
34c11a70 POH |
2634 | |
2635 | di->flags.vbus_drop_end = false; | |
2636 | ||
2637 | /* Reset the drop counter */ | |
2638 | abx500_set_register_interruptible(di->dev, | |
2639 | AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01); | |
861a30da | 2640 | |
4c4268dc LW |
2641 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, |
2642 | AB8500_CH_USBCH_STAT2_REG, ®_value); | |
f7470b5d | 2643 | if (ret < 0) { |
861a30da LJ |
2644 | dev_err(di->dev, "%s read failed\n", __func__); |
2645 | return; | |
2646 | } | |
2647 | ||
4c4268dc LW |
2648 | curr = di->bm->chg_input_curr[ |
2649 | reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT]; | |
861a30da LJ |
2650 | |
2651 | if (di->max_usb_in_curr.calculated_max != curr) { | |
2652 | /* USB source is collapsing */ | |
2653 | di->max_usb_in_curr.calculated_max = curr; | |
2654 | dev_dbg(di->dev, | |
2655 | "VBUS input current limiting to %d mA\n", | |
2656 | di->max_usb_in_curr.calculated_max); | |
2657 | } else { | |
2658 | /* | |
2659 | * USB source can not give more than this amount. | |
2660 | * Taking more will collapse the source. | |
2661 | */ | |
2662 | di->max_usb_in_curr.set_max = | |
2663 | di->max_usb_in_curr.calculated_max; | |
2664 | dev_dbg(di->dev, | |
2665 | "VBUS input current limited to %d mA\n", | |
2666 | di->max_usb_in_curr.set_max); | |
f7470b5d | 2667 | } |
34c11a70 POH |
2668 | |
2669 | if (di->usb.charger_connected) | |
f7470b5d LJ |
2670 | ab8500_charger_set_vbus_in_curr(di, |
2671 | di->max_usb_in_curr.usb_type_max); | |
34c11a70 POH |
2672 | } |
2673 | ||
84edbeea AM |
2674 | /** |
2675 | * ab8500_charger_vbusdetf_handler() - VBUS falling detected | |
2676 | * @irq: interrupt number | |
2677 | * @_di: pointer to the ab8500_charger structure | |
2678 | * | |
2679 | * Returns IRQ status(IRQ_HANDLED) | |
2680 | */ | |
2681 | static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di) | |
2682 | { | |
2683 | struct ab8500_charger *di = _di; | |
2684 | ||
34c11a70 | 2685 | di->vbus_detected = false; |
84edbeea AM |
2686 | dev_dbg(di->dev, "VBUS falling detected\n"); |
2687 | queue_work(di->charger_wq, &di->detect_usb_type_work); | |
2688 | ||
2689 | return IRQ_HANDLED; | |
2690 | } | |
2691 | ||
2692 | /** | |
2693 | * ab8500_charger_vbusdetr_handler() - VBUS rising detected | |
2694 | * @irq: interrupt number | |
2695 | * @_di: pointer to the ab8500_charger structure | |
2696 | * | |
2697 | * Returns IRQ status(IRQ_HANDLED) | |
2698 | */ | |
2699 | static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di) | |
2700 | { | |
2701 | struct ab8500_charger *di = _di; | |
2702 | ||
2703 | di->vbus_detected = true; | |
2704 | dev_dbg(di->dev, "VBUS rising detected\n"); | |
34c11a70 | 2705 | |
84edbeea AM |
2706 | queue_work(di->charger_wq, &di->detect_usb_type_work); |
2707 | ||
2708 | return IRQ_HANDLED; | |
2709 | } | |
2710 | ||
2711 | /** | |
2712 | * ab8500_charger_usblinkstatus_handler() - USB link status has changed | |
2713 | * @irq: interrupt number | |
2714 | * @_di: pointer to the ab8500_charger structure | |
2715 | * | |
2716 | * Returns IRQ status(IRQ_HANDLED) | |
2717 | */ | |
2718 | static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di) | |
2719 | { | |
2720 | struct ab8500_charger *di = _di; | |
2721 | ||
2722 | dev_dbg(di->dev, "USB link status changed\n"); | |
2723 | ||
2724 | queue_work(di->charger_wq, &di->usb_link_status_work); | |
2725 | ||
2726 | return IRQ_HANDLED; | |
2727 | } | |
2728 | ||
2729 | /** | |
2730 | * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger | |
2731 | * thermal protection threshold | |
2732 | * @irq: interrupt number | |
2733 | * @_di: pointer to the ab8500_charger structure | |
2734 | * | |
2735 | * Returns IRQ status(IRQ_HANDLED) | |
2736 | */ | |
2737 | static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di) | |
2738 | { | |
2739 | struct ab8500_charger *di = _di; | |
2740 | ||
2741 | dev_dbg(di->dev, | |
2742 | "Die temp above USB charger thermal protection threshold\n"); | |
2743 | queue_work(di->charger_wq, &di->check_usb_thermal_prot_work); | |
2744 | ||
2745 | return IRQ_HANDLED; | |
2746 | } | |
2747 | ||
2748 | /** | |
2749 | * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger | |
2750 | * thermal protection threshold | |
2751 | * @irq: interrupt number | |
2752 | * @_di: pointer to the ab8500_charger structure | |
2753 | * | |
2754 | * Returns IRQ status(IRQ_HANDLED) | |
2755 | */ | |
2756 | static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di) | |
2757 | { | |
2758 | struct ab8500_charger *di = _di; | |
2759 | ||
2760 | dev_dbg(di->dev, | |
2761 | "Die temp ok for USB charger thermal protection threshold\n"); | |
2762 | queue_work(di->charger_wq, &di->check_usb_thermal_prot_work); | |
2763 | ||
2764 | return IRQ_HANDLED; | |
2765 | } | |
2766 | ||
2767 | /** | |
2768 | * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected | |
2769 | * @irq: interrupt number | |
2770 | * @_di: pointer to the ab8500_charger structure | |
2771 | * | |
2772 | * Returns IRQ status(IRQ_HANDLED) | |
2773 | */ | |
2774 | static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di) | |
2775 | { | |
2776 | struct ab8500_charger *di = _di; | |
2777 | ||
2778 | dev_dbg(di->dev, "Not allowed USB charger detected\n"); | |
2779 | queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0); | |
2780 | ||
2781 | return IRQ_HANDLED; | |
2782 | } | |
2783 | ||
2784 | /** | |
2785 | * ab8500_charger_chwdexp_handler() - Charger watchdog expired | |
2786 | * @irq: interrupt number | |
2787 | * @_di: pointer to the ab8500_charger structure | |
2788 | * | |
2789 | * Returns IRQ status(IRQ_HANDLED) | |
2790 | */ | |
2791 | static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di) | |
2792 | { | |
2793 | struct ab8500_charger *di = _di; | |
2794 | ||
2795 | dev_dbg(di->dev, "Charger watchdog expired\n"); | |
2796 | ||
2797 | /* | |
2798 | * The charger that was online when the watchdog expired | |
2799 | * needs to be restarted for charging to start again | |
2800 | */ | |
2801 | if (di->ac.charger_online) { | |
2802 | di->ac.wd_expired = true; | |
297d716f | 2803 | ab8500_power_supply_changed(di, di->ac_chg.psy); |
84edbeea AM |
2804 | } |
2805 | if (di->usb.charger_online) { | |
2806 | di->usb.wd_expired = true; | |
297d716f | 2807 | ab8500_power_supply_changed(di, di->usb_chg.psy); |
84edbeea AM |
2808 | } |
2809 | ||
2810 | return IRQ_HANDLED; | |
2811 | } | |
2812 | ||
34c11a70 POH |
2813 | /** |
2814 | * ab8500_charger_vbuschdropend_handler() - VBUS drop removed | |
2815 | * @irq: interrupt number | |
2816 | * @_di: pointer to the ab8500_charger structure | |
2817 | * | |
2818 | * Returns IRQ status(IRQ_HANDLED) | |
2819 | */ | |
2820 | static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di) | |
2821 | { | |
2822 | struct ab8500_charger *di = _di; | |
2823 | ||
2824 | dev_dbg(di->dev, "VBUS charger drop ended\n"); | |
2825 | di->flags.vbus_drop_end = true; | |
f7470b5d LJ |
2826 | |
2827 | /* | |
2828 | * VBUS might have dropped due to bad connection. | |
2829 | * Schedule a new input limit set to the value SW requests. | |
2830 | */ | |
34c11a70 | 2831 | queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, |
f7470b5d | 2832 | round_jiffies(VBUS_IN_CURR_LIM_RETRY_SET_TIME * HZ)); |
34c11a70 POH |
2833 | |
2834 | return IRQ_HANDLED; | |
2835 | } | |
2836 | ||
84edbeea AM |
2837 | /** |
2838 | * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected | |
2839 | * @irq: interrupt number | |
2840 | * @_di: pointer to the ab8500_charger structure | |
2841 | * | |
2842 | * Returns IRQ status(IRQ_HANDLED) | |
2843 | */ | |
2844 | static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di) | |
2845 | { | |
2846 | struct ab8500_charger *di = _di; | |
2847 | ||
2848 | dev_dbg(di->dev, "VBUS overvoltage detected\n"); | |
2849 | di->flags.vbus_ovv = true; | |
297d716f | 2850 | ab8500_power_supply_changed(di, di->usb_chg.psy); |
84edbeea AM |
2851 | |
2852 | /* Schedule a new HW failure check */ | |
2853 | queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); | |
2854 | ||
2855 | return IRQ_HANDLED; | |
2856 | } | |
2857 | ||
2858 | /** | |
2859 | * ab8500_charger_ac_get_property() - get the ac/mains properties | |
2860 | * @psy: pointer to the power_supply structure | |
2861 | * @psp: pointer to the power_supply_property structure | |
2862 | * @val: pointer to the power_supply_propval union | |
2863 | * | |
2864 | * This function gets called when an application tries to get the ac/mains | |
2865 | * properties by reading the sysfs files. | |
2866 | * AC/Mains properties are online, present and voltage. | |
2867 | * online: ac/mains charging is in progress or not | |
2868 | * present: presence of the ac/mains | |
2869 | * voltage: AC/Mains voltage | |
2870 | * Returns error code in case of failure else 0(on success) | |
2871 | */ | |
2872 | static int ab8500_charger_ac_get_property(struct power_supply *psy, | |
2873 | enum power_supply_property psp, | |
2874 | union power_supply_propval *val) | |
2875 | { | |
2876 | struct ab8500_charger *di; | |
a864c5a8 | 2877 | int ret; |
84edbeea AM |
2878 | |
2879 | di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy)); | |
2880 | ||
2881 | switch (psp) { | |
2882 | case POWER_SUPPLY_PROP_HEALTH: | |
2883 | if (di->flags.mainextchnotok) | |
2884 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
2885 | else if (di->ac.wd_expired || di->usb.wd_expired) | |
2886 | val->intval = POWER_SUPPLY_HEALTH_DEAD; | |
2887 | else if (di->flags.main_thermal_prot) | |
2888 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
2889 | else | |
2890 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
2891 | break; | |
2892 | case POWER_SUPPLY_PROP_ONLINE: | |
2893 | val->intval = di->ac.charger_online; | |
2894 | break; | |
2895 | case POWER_SUPPLY_PROP_PRESENT: | |
2896 | val->intval = di->ac.charger_connected; | |
2897 | break; | |
2898 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a864c5a8 JA |
2899 | ret = ab8500_charger_get_ac_voltage(di); |
2900 | if (ret >= 0) | |
2901 | di->ac.charger_voltage = ret; | |
2902 | /* On error, use previous value */ | |
84edbeea AM |
2903 | val->intval = di->ac.charger_voltage * 1000; |
2904 | break; | |
2905 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
2906 | /* | |
2907 | * This property is used to indicate when CV mode is entered | |
2908 | * for the AC charger | |
2909 | */ | |
2910 | di->ac.cv_active = ab8500_charger_ac_cv(di); | |
2911 | val->intval = di->ac.cv_active; | |
2912 | break; | |
2913 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
a864c5a8 JA |
2914 | ret = ab8500_charger_get_ac_current(di); |
2915 | if (ret >= 0) | |
2916 | di->ac.charger_current = ret; | |
2917 | val->intval = di->ac.charger_current * 1000; | |
84edbeea AM |
2918 | break; |
2919 | default: | |
2920 | return -EINVAL; | |
2921 | } | |
2922 | return 0; | |
2923 | } | |
2924 | ||
2925 | /** | |
2926 | * ab8500_charger_usb_get_property() - get the usb properties | |
2927 | * @psy: pointer to the power_supply structure | |
2928 | * @psp: pointer to the power_supply_property structure | |
2929 | * @val: pointer to the power_supply_propval union | |
2930 | * | |
2931 | * This function gets called when an application tries to get the usb | |
2932 | * properties by reading the sysfs files. | |
2933 | * USB properties are online, present and voltage. | |
2934 | * online: usb charging is in progress or not | |
2935 | * present: presence of the usb | |
2936 | * voltage: vbus voltage | |
2937 | * Returns error code in case of failure else 0(on success) | |
2938 | */ | |
2939 | static int ab8500_charger_usb_get_property(struct power_supply *psy, | |
2940 | enum power_supply_property psp, | |
2941 | union power_supply_propval *val) | |
2942 | { | |
2943 | struct ab8500_charger *di; | |
a864c5a8 | 2944 | int ret; |
84edbeea AM |
2945 | |
2946 | di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy)); | |
2947 | ||
2948 | switch (psp) { | |
2949 | case POWER_SUPPLY_PROP_HEALTH: | |
2950 | if (di->flags.usbchargernotok) | |
2951 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
2952 | else if (di->ac.wd_expired || di->usb.wd_expired) | |
2953 | val->intval = POWER_SUPPLY_HEALTH_DEAD; | |
2954 | else if (di->flags.usb_thermal_prot) | |
2955 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
2956 | else if (di->flags.vbus_ovv) | |
2957 | val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
2958 | else | |
2959 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
2960 | break; | |
2961 | case POWER_SUPPLY_PROP_ONLINE: | |
2962 | val->intval = di->usb.charger_online; | |
2963 | break; | |
2964 | case POWER_SUPPLY_PROP_PRESENT: | |
2965 | val->intval = di->usb.charger_connected; | |
2966 | break; | |
2967 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a864c5a8 JA |
2968 | ret = ab8500_charger_get_vbus_voltage(di); |
2969 | if (ret >= 0) | |
2970 | di->usb.charger_voltage = ret; | |
84edbeea AM |
2971 | val->intval = di->usb.charger_voltage * 1000; |
2972 | break; | |
2973 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
2974 | /* | |
2975 | * This property is used to indicate when CV mode is entered | |
2976 | * for the USB charger | |
2977 | */ | |
2978 | di->usb.cv_active = ab8500_charger_usb_cv(di); | |
2979 | val->intval = di->usb.cv_active; | |
2980 | break; | |
2981 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
a864c5a8 JA |
2982 | ret = ab8500_charger_get_usb_current(di); |
2983 | if (ret >= 0) | |
2984 | di->usb.charger_current = ret; | |
2985 | val->intval = di->usb.charger_current * 1000; | |
84edbeea AM |
2986 | break; |
2987 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
2988 | /* | |
2989 | * This property is used to indicate when VBUS has collapsed | |
2990 | * due to too high output current from the USB charger | |
2991 | */ | |
2992 | if (di->flags.vbus_collapse) | |
2993 | val->intval = 1; | |
2994 | else | |
2995 | val->intval = 0; | |
2996 | break; | |
2997 | default: | |
2998 | return -EINVAL; | |
2999 | } | |
3000 | return 0; | |
3001 | } | |
3002 | ||
3003 | /** | |
3004 | * ab8500_charger_init_hw_registers() - Set up charger related registers | |
3005 | * @di: pointer to the ab8500_charger structure | |
3006 | * | |
3007 | * Set up charger OVV, watchdog and maximum voltage registers as well as | |
3008 | * charging of the backup battery | |
3009 | */ | |
3010 | static int ab8500_charger_init_hw_registers(struct ab8500_charger *di) | |
3011 | { | |
3012 | int ret = 0; | |
0f4aa401 | 3013 | u8 bup_vch_range = 0, vbup33_vrtcn = 0; |
84edbeea AM |
3014 | |
3015 | /* Setup maximum charger current and voltage for ABB cut2.0 */ | |
3016 | if (!is_ab8500_1p1_or_earlier(di->parent)) { | |
3017 | ret = abx500_set_register_interruptible(di->dev, | |
3018 | AB8500_CHARGER, | |
3019 | AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6); | |
3020 | if (ret) { | |
3021 | dev_err(di->dev, | |
3022 | "failed to set CH_VOLT_LVL_MAX_REG\n"); | |
3023 | goto out; | |
3024 | } | |
3025 | ||
4c4268dc LW |
3026 | ret = abx500_set_register_interruptible(di->dev, |
3027 | AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG, | |
3028 | CH_OP_CUR_LVL_1P6); | |
84edbeea AM |
3029 | if (ret) { |
3030 | dev_err(di->dev, | |
3031 | "failed to set CH_OPT_CRNTLVL_MAX_REG\n"); | |
3032 | goto out; | |
3033 | } | |
3034 | } | |
3035 | ||
4c4268dc | 3036 | if (is_ab8505_2p0(di->parent)) |
0ed5107f JA |
3037 | ret = abx500_mask_and_set_register_interruptible(di->dev, |
3038 | AB8500_CHARGER, | |
3039 | AB8500_USBCH_CTRL2_REG, | |
3040 | VBUS_AUTO_IN_CURR_LIM_ENA, | |
3041 | VBUS_AUTO_IN_CURR_LIM_ENA); | |
3042 | else | |
3043 | /* | |
3044 | * VBUS OVV set to 6.3V and enable automatic current limitation | |
3045 | */ | |
3046 | ret = abx500_set_register_interruptible(di->dev, | |
3047 | AB8500_CHARGER, | |
3048 | AB8500_USBCH_CTRL2_REG, | |
3049 | VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA); | |
84edbeea | 3050 | if (ret) { |
0ed5107f JA |
3051 | dev_err(di->dev, |
3052 | "failed to set automatic current limitation\n"); | |
84edbeea AM |
3053 | goto out; |
3054 | } | |
3055 | ||
3056 | /* Enable main watchdog in OTP */ | |
3057 | ret = abx500_set_register_interruptible(di->dev, | |
3058 | AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD); | |
3059 | if (ret) { | |
3060 | dev_err(di->dev, "failed to enable main WD in OTP\n"); | |
3061 | goto out; | |
3062 | } | |
3063 | ||
3064 | /* Enable main watchdog */ | |
3065 | ret = abx500_set_register_interruptible(di->dev, | |
3066 | AB8500_SYS_CTRL2_BLOCK, | |
3067 | AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA); | |
3068 | if (ret) { | |
b5e11cc1 | 3069 | dev_err(di->dev, "failed to enable main watchdog\n"); |
84edbeea AM |
3070 | goto out; |
3071 | } | |
3072 | ||
3073 | /* | |
3074 | * Due to internal synchronisation, Enable and Kick watchdog bits | |
3075 | * cannot be enabled in a single write. | |
3076 | * A minimum delay of 2*32 kHz period (62.5µs) must be inserted | |
3077 | * between writing Enable then Kick bits. | |
3078 | */ | |
3079 | udelay(63); | |
3080 | ||
3081 | /* Kick main watchdog */ | |
3082 | ret = abx500_set_register_interruptible(di->dev, | |
3083 | AB8500_SYS_CTRL2_BLOCK, | |
3084 | AB8500_MAIN_WDOG_CTRL_REG, | |
3085 | (MAIN_WDOG_ENA | MAIN_WDOG_KICK)); | |
3086 | if (ret) { | |
3087 | dev_err(di->dev, "failed to kick main watchdog\n"); | |
3088 | goto out; | |
3089 | } | |
3090 | ||
3091 | /* Disable main watchdog */ | |
3092 | ret = abx500_set_register_interruptible(di->dev, | |
3093 | AB8500_SYS_CTRL2_BLOCK, | |
3094 | AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS); | |
3095 | if (ret) { | |
3096 | dev_err(di->dev, "failed to disable main watchdog\n"); | |
3097 | goto out; | |
3098 | } | |
3099 | ||
3100 | /* Set watchdog timeout */ | |
3101 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
3102 | AB8500_CH_WD_TIMER_REG, WD_TIMER); | |
3103 | if (ret) { | |
3104 | dev_err(di->dev, "failed to set charger watchdog timeout\n"); | |
34c11a70 POH |
3105 | goto out; |
3106 | } | |
3107 | ||
3108 | ret = ab8500_charger_led_en(di, false); | |
3109 | if (ret < 0) { | |
3110 | dev_err(di->dev, "failed to disable LED\n"); | |
3111 | goto out; | |
3112 | } | |
3113 | ||
84edbeea | 3114 | /* Backup battery voltage and current */ |
0f4aa401 YQ |
3115 | if (di->bm->bkup_bat_v > BUP_VCH_SEL_3P1V) |
3116 | bup_vch_range = BUP_VCH_RANGE; | |
3117 | if (di->bm->bkup_bat_v == BUP_VCH_SEL_3P3V) | |
3118 | vbup33_vrtcn = VBUP33_VRTCN; | |
3119 | ||
84edbeea AM |
3120 | ret = abx500_set_register_interruptible(di->dev, |
3121 | AB8500_RTC, | |
3122 | AB8500_RTC_BACKUP_CHG_REG, | |
0f4aa401 | 3123 | (di->bm->bkup_bat_v & 0x3) | di->bm->bkup_bat_i); |
84edbeea AM |
3124 | if (ret) { |
3125 | dev_err(di->dev, "failed to setup backup battery charging\n"); | |
3126 | goto out; | |
3127 | } | |
3128 | ||
3129 | /* Enable backup battery charging */ | |
bf59fddd | 3130 | ret = abx500_mask_and_set_register_interruptible(di->dev, |
84edbeea AM |
3131 | AB8500_RTC, AB8500_RTC_CTRL_REG, |
3132 | RTC_BUP_CH_ENA, RTC_BUP_CH_ENA); | |
09edcb64 | 3133 | if (ret < 0) { |
84edbeea | 3134 | dev_err(di->dev, "%s mask and set failed\n", __func__); |
09edcb64 CJ |
3135 | goto out; |
3136 | } | |
84edbeea AM |
3137 | |
3138 | out: | |
3139 | return ret; | |
3140 | } | |
3141 | ||
3142 | /* | |
3143 | * ab8500 charger driver interrupts and their respective isr | |
3144 | */ | |
3145 | static struct ab8500_charger_interrupts ab8500_charger_irq[] = { | |
3146 | {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler}, | |
3147 | {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler}, | |
3148 | {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler}, | |
3149 | {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler}, | |
3150 | {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler}, | |
3151 | {"VBUS_DET_F", ab8500_charger_vbusdetf_handler}, | |
3152 | {"VBUS_DET_R", ab8500_charger_vbusdetr_handler}, | |
3153 | {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler}, | |
3154 | {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler}, | |
3155 | {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler}, | |
3156 | {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler}, | |
3157 | {"VBUS_OVV", ab8500_charger_vbusovv_handler}, | |
3158 | {"CH_WD_EXP", ab8500_charger_chwdexp_handler}, | |
34c11a70 | 3159 | {"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler}, |
84edbeea AM |
3160 | }; |
3161 | ||
3162 | static int ab8500_charger_usb_notifier_call(struct notifier_block *nb, | |
3163 | unsigned long event, void *power) | |
3164 | { | |
3165 | struct ab8500_charger *di = | |
3166 | container_of(nb, struct ab8500_charger, nb); | |
3167 | enum ab8500_usb_state bm_usb_state; | |
3168 | unsigned mA = *((unsigned *)power); | |
3169 | ||
c9ade0fc LJ |
3170 | if (!di) |
3171 | return NOTIFY_DONE; | |
3172 | ||
84edbeea AM |
3173 | if (event != USB_EVENT_VBUS) { |
3174 | dev_dbg(di->dev, "not a standard host, returning\n"); | |
3175 | return NOTIFY_DONE; | |
3176 | } | |
3177 | ||
3178 | /* TODO: State is fabricate here. See if charger really needs USB | |
3179 | * state or if mA is enough | |
3180 | */ | |
3181 | if ((di->usb_state.usb_current == 2) && (mA > 2)) | |
3182 | bm_usb_state = AB8500_BM_USB_STATE_RESUME; | |
3183 | else if (mA == 0) | |
3184 | bm_usb_state = AB8500_BM_USB_STATE_RESET_HS; | |
3185 | else if (mA == 2) | |
3186 | bm_usb_state = AB8500_BM_USB_STATE_SUSPEND; | |
3187 | else if (mA >= 8) /* 8, 100, 500 */ | |
3188 | bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED; | |
3189 | else /* Should never occur */ | |
3190 | bm_usb_state = AB8500_BM_USB_STATE_RESET_FS; | |
3191 | ||
3192 | dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n", | |
3193 | __func__, bm_usb_state, mA); | |
3194 | ||
3195 | spin_lock(&di->usb_state.usb_lock); | |
34c11a70 POH |
3196 | di->usb_state.state_tmp = bm_usb_state; |
3197 | di->usb_state.usb_current_tmp = mA; | |
84edbeea AM |
3198 | spin_unlock(&di->usb_state.usb_lock); |
3199 | ||
34c11a70 POH |
3200 | /* |
3201 | * wait for some time until you get updates from the usb stack | |
3202 | * and negotiations are completed | |
3203 | */ | |
3204 | queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2); | |
84edbeea AM |
3205 | |
3206 | return NOTIFY_OK; | |
3207 | } | |
3208 | ||
3209 | #if defined(CONFIG_PM) | |
3210 | static int ab8500_charger_resume(struct platform_device *pdev) | |
3211 | { | |
3212 | int ret; | |
3213 | struct ab8500_charger *di = platform_get_drvdata(pdev); | |
3214 | ||
3215 | /* | |
3216 | * For ABB revision 1.0 and 1.1 there is a bug in the watchdog | |
3217 | * logic. That means we have to continously kick the charger | |
3218 | * watchdog even when no charger is connected. This is only | |
3219 | * valid once the AC charger has been enabled. This is | |
3220 | * a bug that is not handled by the algorithm and the | |
3221 | * watchdog have to be kicked by the charger driver | |
3222 | * when the AC charger is disabled | |
3223 | */ | |
3224 | if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) { | |
3225 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
3226 | AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); | |
3227 | if (ret) | |
3228 | dev_err(di->dev, "Failed to kick WD!\n"); | |
3229 | ||
3230 | /* If not already pending start a new timer */ | |
b09f86db LJ |
3231 | queue_delayed_work(di->charger_wq, &di->kick_wd_work, |
3232 | round_jiffies(WD_KICK_INTERVAL)); | |
84edbeea AM |
3233 | } |
3234 | ||
3235 | /* If we still have a HW failure, schedule a new check */ | |
3236 | if (di->flags.mainextchnotok || di->flags.vbus_ovv) { | |
3237 | queue_delayed_work(di->charger_wq, | |
3238 | &di->check_hw_failure_work, 0); | |
3239 | } | |
3240 | ||
34c11a70 POH |
3241 | if (di->flags.vbus_drop_end) |
3242 | queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0); | |
3243 | ||
84edbeea AM |
3244 | return 0; |
3245 | } | |
3246 | ||
3247 | static int ab8500_charger_suspend(struct platform_device *pdev, | |
3248 | pm_message_t state) | |
3249 | { | |
3250 | struct ab8500_charger *di = platform_get_drvdata(pdev); | |
3251 | ||
b09f86db LJ |
3252 | /* Cancel any pending jobs */ |
3253 | cancel_delayed_work(&di->check_hw_failure_work); | |
3254 | cancel_delayed_work(&di->vbus_drop_end_work); | |
34c11a70 | 3255 | |
53ef1f59 JA |
3256 | flush_delayed_work(&di->attach_work); |
3257 | flush_delayed_work(&di->usb_charger_attached_work); | |
3258 | flush_delayed_work(&di->ac_charger_attached_work); | |
3259 | flush_delayed_work(&di->check_usbchgnotok_work); | |
3260 | flush_delayed_work(&di->check_vbat_work); | |
3261 | flush_delayed_work(&di->kick_wd_work); | |
3262 | ||
3263 | flush_work(&di->usb_link_status_work); | |
3264 | flush_work(&di->ac_work); | |
3265 | flush_work(&di->detect_usb_type_work); | |
3266 | ||
34c11a70 POH |
3267 | if (atomic_read(&di->current_stepping_sessions)) |
3268 | return -EAGAIN; | |
3269 | ||
84edbeea AM |
3270 | return 0; |
3271 | } | |
3272 | #else | |
3273 | #define ab8500_charger_suspend NULL | |
3274 | #define ab8500_charger_resume NULL | |
3275 | #endif | |
3276 | ||
8891716e LJ |
3277 | static struct notifier_block charger_nb = { |
3278 | .notifier_call = ab8500_external_charger_prepare, | |
3279 | }; | |
3280 | ||
415ec69f | 3281 | static int ab8500_charger_remove(struct platform_device *pdev) |
84edbeea AM |
3282 | { |
3283 | struct ab8500_charger *di = platform_get_drvdata(pdev); | |
3284 | int i, irq, ret; | |
3285 | ||
3286 | /* Disable AC charging */ | |
3287 | ab8500_charger_ac_en(&di->ac_chg, false, 0, 0); | |
3288 | ||
3289 | /* Disable USB charging */ | |
3290 | ab8500_charger_usb_en(&di->usb_chg, false, 0, 0); | |
3291 | ||
3292 | /* Disable interrupts */ | |
3293 | for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) { | |
3294 | irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); | |
3295 | free_irq(irq, di); | |
3296 | } | |
3297 | ||
84edbeea AM |
3298 | /* Backup battery voltage and current disable */ |
3299 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
3300 | AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0); | |
3301 | if (ret < 0) | |
3302 | dev_err(di->dev, "%s mask and set failed\n", __func__); | |
3303 | ||
efd71c89 | 3304 | usb_unregister_notifier(di->usb_phy, &di->nb); |
721002ec | 3305 | usb_put_phy(di->usb_phy); |
84edbeea AM |
3306 | |
3307 | /* Delete the work queue */ | |
3308 | destroy_workqueue(di->charger_wq); | |
3309 | ||
8891716e LJ |
3310 | /* Unregister external charger enable notifier */ |
3311 | if (!di->ac_chg.enabled) | |
3312 | blocking_notifier_chain_unregister( | |
3313 | &charger_notifier_list, &charger_nb); | |
3314 | ||
84edbeea | 3315 | flush_scheduled_work(); |
72a90ddb | 3316 | if (di->usb_chg.enabled) |
297d716f | 3317 | power_supply_unregister(di->usb_chg.psy); |
405fea1c MC |
3318 | |
3319 | if (di->ac_chg.enabled && !di->ac_chg.external) | |
297d716f | 3320 | power_supply_unregister(di->ac_chg.psy); |
405fea1c | 3321 | |
84edbeea AM |
3322 | return 0; |
3323 | } | |
3324 | ||
4aef72db R |
3325 | static char *supply_interface[] = { |
3326 | "ab8500_chargalg", | |
3327 | "ab8500_fg", | |
3328 | "ab8500_btemp", | |
3329 | }; | |
3330 | ||
297d716f KK |
3331 | static const struct power_supply_desc ab8500_ac_chg_desc = { |
3332 | .name = "ab8500_ac", | |
3333 | .type = POWER_SUPPLY_TYPE_MAINS, | |
3334 | .properties = ab8500_charger_ac_props, | |
3335 | .num_properties = ARRAY_SIZE(ab8500_charger_ac_props), | |
3336 | .get_property = ab8500_charger_ac_get_property, | |
3337 | }; | |
3338 | ||
3339 | static const struct power_supply_desc ab8500_usb_chg_desc = { | |
3340 | .name = "ab8500_usb", | |
3341 | .type = POWER_SUPPLY_TYPE_USB, | |
3342 | .properties = ab8500_charger_usb_props, | |
3343 | .num_properties = ARRAY_SIZE(ab8500_charger_usb_props), | |
3344 | .get_property = ab8500_charger_usb_get_property, | |
3345 | }; | |
3346 | ||
c8afa640 | 3347 | static int ab8500_charger_probe(struct platform_device *pdev) |
84edbeea | 3348 | { |
4aef72db | 3349 | struct device_node *np = pdev->dev.of_node; |
7722b799 | 3350 | struct abx500_bm_data *plat = pdev->dev.platform_data; |
297d716f | 3351 | struct power_supply_config ac_psy_cfg = {}, usb_psy_cfg = {}; |
2aac3de1 | 3352 | struct ab8500_charger *di; |
b269fff4 | 3353 | int irq, i, charger_status, ret = 0, ch_stat; |
84edbeea | 3354 | |
4aef72db R |
3355 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
3356 | if (!di) { | |
3357 | dev_err(&pdev->dev, "%s no mem for ab8500_charger\n", __func__); | |
84edbeea | 3358 | return -ENOMEM; |
4aef72db | 3359 | } |
7722b799 LJ |
3360 | |
3361 | if (!plat) { | |
3362 | dev_err(&pdev->dev, "no battery management data supplied\n"); | |
3363 | return -EINVAL; | |
3364 | } | |
3365 | di->bm = plat; | |
3366 | ||
3367 | if (np) { | |
3368 | ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm); | |
3369 | if (ret) { | |
3370 | dev_err(&pdev->dev, "failed to get battery information\n"); | |
3371 | return ret; | |
4aef72db | 3372 | } |
7722b799 LJ |
3373 | di->autopower_cfg = of_property_read_bool(np, "autopower_cfg"); |
3374 | } else | |
4aef72db | 3375 | di->autopower_cfg = false; |
84edbeea AM |
3376 | |
3377 | /* get parent data */ | |
3378 | di->dev = &pdev->dev; | |
3379 | di->parent = dev_get_drvdata(pdev->dev.parent); | |
3380 | di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0"); | |
3381 | ||
3382 | /* initialize lock */ | |
3383 | spin_lock_init(&di->usb_state.usb_lock); | |
34c11a70 | 3384 | mutex_init(&di->usb_ipt_crnt_lock); |
84edbeea | 3385 | |
84edbeea | 3386 | di->autopower = false; |
ff38090a | 3387 | di->invalid_charger_detect_state = 0; |
84edbeea | 3388 | |
2dc9215d | 3389 | /* AC and USB supply config */ |
297d716f KK |
3390 | ac_psy_cfg.supplied_to = supply_interface; |
3391 | ac_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); | |
3392 | ac_psy_cfg.drv_data = &di->ac_chg; | |
3393 | usb_psy_cfg.supplied_to = supply_interface; | |
3394 | usb_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); | |
3395 | usb_psy_cfg.drv_data = &di->usb_chg; | |
2dc9215d | 3396 | |
84edbeea | 3397 | /* AC supply */ |
84edbeea AM |
3398 | /* ux500_charger sub-class */ |
3399 | di->ac_chg.ops.enable = &ab8500_charger_ac_en; | |
4dcdf577 | 3400 | di->ac_chg.ops.check_enable = &ab8500_charger_ac_check_enable; |
84edbeea AM |
3401 | di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick; |
3402 | di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current; | |
3403 | di->ac_chg.max_out_volt = ab8500_charger_voltage_map[ | |
3404 | ARRAY_SIZE(ab8500_charger_voltage_map) - 1]; | |
861a30da LJ |
3405 | di->ac_chg.max_out_curr = |
3406 | di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1]; | |
e07a5645 | 3407 | di->ac_chg.wdt_refresh = CHG_WD_INTERVAL; |
97034a1e | 3408 | di->ac_chg.enabled = di->bm->ac_enabled; |
e07a5645 | 3409 | di->ac_chg.external = false; |
84edbeea | 3410 | |
8891716e LJ |
3411 | /*notifier for external charger enabling*/ |
3412 | if (!di->ac_chg.enabled) | |
3413 | blocking_notifier_chain_register( | |
3414 | &charger_notifier_list, &charger_nb); | |
3415 | ||
84edbeea | 3416 | /* USB supply */ |
84edbeea AM |
3417 | /* ux500_charger sub-class */ |
3418 | di->usb_chg.ops.enable = &ab8500_charger_usb_en; | |
4dcdf577 | 3419 | di->usb_chg.ops.check_enable = &ab8500_charger_usb_check_enable; |
84edbeea AM |
3420 | di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick; |
3421 | di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current; | |
3422 | di->usb_chg.max_out_volt = ab8500_charger_voltage_map[ | |
3423 | ARRAY_SIZE(ab8500_charger_voltage_map) - 1]; | |
861a30da LJ |
3424 | di->usb_chg.max_out_curr = |
3425 | di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1]; | |
e07a5645 | 3426 | di->usb_chg.wdt_refresh = CHG_WD_INTERVAL; |
97034a1e | 3427 | di->usb_chg.enabled = di->bm->usb_enabled; |
e07a5645 | 3428 | di->usb_chg.external = false; |
f7470b5d | 3429 | di->usb_state.usb_current = -1; |
84edbeea AM |
3430 | |
3431 | /* Create a work queue for the charger */ | |
9df82628 BS |
3432 | di->charger_wq = alloc_ordered_workqueue("ab8500_charger_wq", |
3433 | WQ_MEM_RECLAIM); | |
84edbeea AM |
3434 | if (di->charger_wq == NULL) { |
3435 | dev_err(di->dev, "failed to create work queue\n"); | |
4aef72db | 3436 | return -ENOMEM; |
84edbeea AM |
3437 | } |
3438 | ||
b269fff4 LJ |
3439 | mutex_init(&di->charger_attached_mutex); |
3440 | ||
84edbeea | 3441 | /* Init work for HW failure check */ |
203b42f7 | 3442 | INIT_DEFERRABLE_WORK(&di->check_hw_failure_work, |
84edbeea | 3443 | ab8500_charger_check_hw_failure_work); |
203b42f7 | 3444 | INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work, |
84edbeea AM |
3445 | ab8500_charger_check_usbchargernotok_work); |
3446 | ||
b269fff4 LJ |
3447 | INIT_DELAYED_WORK(&di->ac_charger_attached_work, |
3448 | ab8500_charger_ac_attached_work); | |
3449 | INIT_DELAYED_WORK(&di->usb_charger_attached_work, | |
3450 | ab8500_charger_usb_attached_work); | |
3451 | ||
84edbeea AM |
3452 | /* |
3453 | * For ABB revision 1.0 and 1.1 there is a bug in the watchdog | |
3454 | * logic. That means we have to continously kick the charger | |
3455 | * watchdog even when no charger is connected. This is only | |
3456 | * valid once the AC charger has been enabled. This is | |
3457 | * a bug that is not handled by the algorithm and the | |
3458 | * watchdog have to be kicked by the charger driver | |
3459 | * when the AC charger is disabled | |
3460 | */ | |
203b42f7 | 3461 | INIT_DEFERRABLE_WORK(&di->kick_wd_work, |
84edbeea AM |
3462 | ab8500_charger_kick_watchdog_work); |
3463 | ||
203b42f7 | 3464 | INIT_DEFERRABLE_WORK(&di->check_vbat_work, |
84edbeea AM |
3465 | ab8500_charger_check_vbat_work); |
3466 | ||
4b45f4a9 MC |
3467 | INIT_DELAYED_WORK(&di->attach_work, |
3468 | ab8500_charger_usb_link_attach_work); | |
3469 | ||
34c11a70 POH |
3470 | INIT_DELAYED_WORK(&di->usb_state_changed_work, |
3471 | ab8500_charger_usb_state_changed_work); | |
3472 | ||
3473 | INIT_DELAYED_WORK(&di->vbus_drop_end_work, | |
3474 | ab8500_charger_vbus_drop_end_work); | |
3475 | ||
84edbeea AM |
3476 | /* Init work for charger detection */ |
3477 | INIT_WORK(&di->usb_link_status_work, | |
3478 | ab8500_charger_usb_link_status_work); | |
3479 | INIT_WORK(&di->ac_work, ab8500_charger_ac_work); | |
3480 | INIT_WORK(&di->detect_usb_type_work, | |
3481 | ab8500_charger_detect_usb_type_work); | |
3482 | ||
84edbeea AM |
3483 | /* Init work for checking HW status */ |
3484 | INIT_WORK(&di->check_main_thermal_prot_work, | |
3485 | ab8500_charger_check_main_thermal_prot_work); | |
3486 | INIT_WORK(&di->check_usb_thermal_prot_work, | |
3487 | ab8500_charger_check_usb_thermal_prot_work); | |
3488 | ||
3489 | /* | |
3490 | * VDD ADC supply needs to be enabled from this driver when there | |
3491 | * is a charger connected to avoid erroneous BTEMP_HIGH/LOW | |
3492 | * interrupts during charging | |
3493 | */ | |
8feffd10 | 3494 | di->regu = devm_regulator_get(di->dev, "vddadc"); |
84edbeea AM |
3495 | if (IS_ERR(di->regu)) { |
3496 | ret = PTR_ERR(di->regu); | |
3497 | dev_err(di->dev, "failed to get vddadc regulator\n"); | |
3498 | goto free_charger_wq; | |
3499 | } | |
3500 | ||
3501 | ||
3502 | /* Initialize OVV, and other registers */ | |
3503 | ret = ab8500_charger_init_hw_registers(di); | |
3504 | if (ret) { | |
3505 | dev_err(di->dev, "failed to initialize ABB registers\n"); | |
8feffd10 | 3506 | goto free_charger_wq; |
84edbeea AM |
3507 | } |
3508 | ||
3509 | /* Register AC charger class */ | |
72a90ddb | 3510 | if (di->ac_chg.enabled) { |
297d716f KK |
3511 | di->ac_chg.psy = power_supply_register(di->dev, |
3512 | &ab8500_ac_chg_desc, | |
3513 | &ac_psy_cfg); | |
3514 | if (IS_ERR(di->ac_chg.psy)) { | |
01ec8c54 | 3515 | dev_err(di->dev, "failed to register AC charger\n"); |
297d716f | 3516 | ret = PTR_ERR(di->ac_chg.psy); |
01ec8c54 MJ |
3517 | goto free_charger_wq; |
3518 | } | |
84edbeea AM |
3519 | } |
3520 | ||
3521 | /* Register USB charger class */ | |
72a90ddb | 3522 | if (di->usb_chg.enabled) { |
297d716f KK |
3523 | di->usb_chg.psy = power_supply_register(di->dev, |
3524 | &ab8500_usb_chg_desc, | |
3525 | &usb_psy_cfg); | |
3526 | if (IS_ERR(di->usb_chg.psy)) { | |
01ec8c54 | 3527 | dev_err(di->dev, "failed to register USB charger\n"); |
297d716f | 3528 | ret = PTR_ERR(di->usb_chg.psy); |
01ec8c54 MJ |
3529 | goto free_ac; |
3530 | } | |
84edbeea AM |
3531 | } |
3532 | ||
662dca54 | 3533 | di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2); |
ded017ee | 3534 | if (IS_ERR_OR_NULL(di->usb_phy)) { |
efd71c89 | 3535 | dev_err(di->dev, "failed to get usb transceiver\n"); |
84edbeea AM |
3536 | ret = -EINVAL; |
3537 | goto free_usb; | |
3538 | } | |
3539 | di->nb.notifier_call = ab8500_charger_usb_notifier_call; | |
efd71c89 | 3540 | ret = usb_register_notifier(di->usb_phy, &di->nb); |
84edbeea | 3541 | if (ret) { |
efd71c89 AV |
3542 | dev_err(di->dev, "failed to register usb notifier\n"); |
3543 | goto put_usb_phy; | |
84edbeea AM |
3544 | } |
3545 | ||
3546 | /* Identify the connected charger types during startup */ | |
34c11a70 | 3547 | charger_status = ab8500_charger_detect_chargers(di, true); |
84edbeea AM |
3548 | if (charger_status & AC_PW_CONN) { |
3549 | di->ac.charger_connected = 1; | |
3550 | di->ac_conn = true; | |
297d716f KK |
3551 | ab8500_power_supply_changed(di, di->ac_chg.psy); |
3552 | sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present"); | |
84edbeea AM |
3553 | } |
3554 | ||
3555 | if (charger_status & USB_PW_CONN) { | |
84edbeea AM |
3556 | di->vbus_detected = true; |
3557 | di->vbus_detected_start = true; | |
3558 | queue_work(di->charger_wq, | |
3559 | &di->detect_usb_type_work); | |
3560 | } | |
3561 | ||
3562 | /* Register interrupts */ | |
3563 | for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) { | |
3564 | irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); | |
3565 | ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr, | |
3566 | IRQF_SHARED | IRQF_NO_SUSPEND, | |
3567 | ab8500_charger_irq[i].name, di); | |
3568 | ||
3569 | if (ret != 0) { | |
3570 | dev_err(di->dev, "failed to request %s IRQ %d: %d\n" | |
3571 | , ab8500_charger_irq[i].name, irq, ret); | |
3572 | goto free_irq; | |
3573 | } | |
3574 | dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", | |
3575 | ab8500_charger_irq[i].name, irq, ret); | |
3576 | } | |
3577 | ||
3578 | platform_set_drvdata(pdev, di); | |
3579 | ||
b269fff4 LJ |
3580 | mutex_lock(&di->charger_attached_mutex); |
3581 | ||
34c11a70 | 3582 | ch_stat = ab8500_charger_detect_chargers(di, false); |
b269fff4 LJ |
3583 | |
3584 | if ((ch_stat & AC_PW_CONN) == AC_PW_CONN) { | |
261c5136 RV |
3585 | if (is_ab8500(di->parent)) |
3586 | queue_delayed_work(di->charger_wq, | |
3587 | &di->ac_charger_attached_work, | |
3588 | HZ); | |
b269fff4 LJ |
3589 | } |
3590 | if ((ch_stat & USB_PW_CONN) == USB_PW_CONN) { | |
261c5136 RV |
3591 | if (is_ab8500(di->parent)) |
3592 | queue_delayed_work(di->charger_wq, | |
3593 | &di->usb_charger_attached_work, | |
3594 | HZ); | |
b269fff4 LJ |
3595 | } |
3596 | ||
3597 | mutex_unlock(&di->charger_attached_mutex); | |
3598 | ||
84edbeea AM |
3599 | return ret; |
3600 | ||
3601 | free_irq: | |
efd71c89 | 3602 | usb_unregister_notifier(di->usb_phy, &di->nb); |
84edbeea AM |
3603 | |
3604 | /* We also have to free all successfully registered irqs */ | |
3605 | for (i = i - 1; i >= 0; i--) { | |
3606 | irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); | |
3607 | free_irq(irq, di); | |
3608 | } | |
efd71c89 | 3609 | put_usb_phy: |
721002ec | 3610 | usb_put_phy(di->usb_phy); |
84edbeea | 3611 | free_usb: |
72a90ddb | 3612 | if (di->usb_chg.enabled) |
297d716f | 3613 | power_supply_unregister(di->usb_chg.psy); |
84edbeea | 3614 | free_ac: |
72a90ddb | 3615 | if (di->ac_chg.enabled) |
297d716f | 3616 | power_supply_unregister(di->ac_chg.psy); |
84edbeea AM |
3617 | free_charger_wq: |
3618 | destroy_workqueue(di->charger_wq); | |
84edbeea AM |
3619 | return ret; |
3620 | } | |
3621 | ||
4aef72db R |
3622 | static const struct of_device_id ab8500_charger_match[] = { |
3623 | { .compatible = "stericsson,ab8500-charger", }, | |
3624 | { }, | |
3625 | }; | |
3626 | ||
84edbeea AM |
3627 | static struct platform_driver ab8500_charger_driver = { |
3628 | .probe = ab8500_charger_probe, | |
28ea73f4 | 3629 | .remove = ab8500_charger_remove, |
84edbeea AM |
3630 | .suspend = ab8500_charger_suspend, |
3631 | .resume = ab8500_charger_resume, | |
3632 | .driver = { | |
3633 | .name = "ab8500-charger", | |
4aef72db | 3634 | .of_match_table = ab8500_charger_match, |
84edbeea AM |
3635 | }, |
3636 | }; | |
3637 | ||
3638 | static int __init ab8500_charger_init(void) | |
3639 | { | |
3640 | return platform_driver_register(&ab8500_charger_driver); | |
3641 | } | |
3642 | ||
3643 | static void __exit ab8500_charger_exit(void) | |
3644 | { | |
3645 | platform_driver_unregister(&ab8500_charger_driver); | |
3646 | } | |
3647 | ||
3648 | subsys_initcall_sync(ab8500_charger_init); | |
3649 | module_exit(ab8500_charger_exit); | |
3650 | ||
3651 | MODULE_LICENSE("GPL v2"); | |
3652 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy"); | |
3653 | MODULE_ALIAS("platform:ab8500-charger"); | |
3654 | MODULE_DESCRIPTION("AB8500 charger management driver"); |