Commit | Line | Data |
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84edbeea AM |
1 | /* |
2 | * Copyright (C) ST-Ericsson SA 2012 | |
3 | * | |
4 | * Charger driver for AB8500 | |
5 | * | |
6 | * License Terms: GNU General Public License v2 | |
7 | * Author: | |
8 | * Johan Palsson <johan.palsson@stericsson.com> | |
9 | * Karl Komierowski <karl.komierowski@stericsson.com> | |
10 | * Arun R Murthy <arun.murthy@stericsson.com> | |
11 | */ | |
12 | ||
13 | #include <linux/init.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/delay.h> | |
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 | |
861a30da | 61 | #define AB8540_VBUS_IN_CURR_LIM_SHIFT 2 |
34c11a70 | 62 | #define AUTO_VBUS_IN_CURR_LIM_SHIFT 4 |
861a30da | 63 | #define AB8540_AUTO_VBUS_IN_CURR_MASK 0x3F |
f7470b5d | 64 | #define VBUS_IN_CURR_LIM_RETRY_SET_TIME 30 /* seconds */ |
84edbeea AM |
65 | |
66 | #define LED_INDICATOR_PWM_ENA 0x01 | |
67 | #define LED_INDICATOR_PWM_DIS 0x00 | |
68 | #define LED_IND_CUR_5MA 0x04 | |
69 | #define LED_INDICATOR_PWM_DUTY_252_256 0xBF | |
70 | ||
71 | /* HW failure constants */ | |
72 | #define MAIN_CH_TH_PROT 0x02 | |
73 | #define VBUS_CH_NOK 0x08 | |
74 | #define USB_CH_TH_PROT 0x02 | |
75 | #define VBUS_OVV_TH 0x01 | |
76 | #define MAIN_CH_NOK 0x01 | |
77 | #define VBUS_DET 0x80 | |
78 | ||
b269fff4 LJ |
79 | #define MAIN_CH_STATUS2_MAINCHGDROP 0x80 |
80 | #define MAIN_CH_STATUS2_MAINCHARGERDETDBNC 0x40 | |
81 | #define USB_CH_VBUSDROP 0x40 | |
82 | #define USB_CH_VBUSDETDBNC 0x01 | |
83 | ||
84edbeea AM |
84 | /* UsbLineStatus register bit masks */ |
85 | #define AB8500_USB_LINK_STATUS 0x78 | |
d4337660 | 86 | #define AB8505_USB_LINK_STATUS 0xF8 |
84edbeea | 87 | #define AB8500_STD_HOST_SUSP 0x18 |
861a30da | 88 | #define USB_LINK_STATUS_SHIFT 3 |
84edbeea AM |
89 | |
90 | /* Watchdog timeout constant */ | |
91 | #define WD_TIMER 0x30 /* 4min */ | |
92 | #define WD_KICK_INTERVAL (60 * HZ) | |
93 | ||
94 | /* Lowest charger voltage is 3.39V -> 0x4E */ | |
95 | #define LOW_VOLT_REG 0x4E | |
96 | ||
f8e96dff JB |
97 | /* Step up/down delay in us */ |
98 | #define STEP_UDELAY 1000 | |
99 | ||
b269fff4 LJ |
100 | #define CHARGER_STATUS_POLL 10 /* in ms */ |
101 | ||
e07a5645 LP |
102 | #define CHG_WD_INTERVAL (60 * HZ) |
103 | ||
b0163222 | 104 | #define AB8500_SW_CONTROL_FALLBACK 0x03 |
34c11a70 POH |
105 | /* Wait for enumeration before charing in us */ |
106 | #define WAIT_ACA_RID_ENUMERATION (5 * 1000) | |
8891716e LJ |
107 | /*External charger control*/ |
108 | #define AB8500_SYS_CHARGER_CONTROL_REG 0x52 | |
109 | #define EXTERNAL_CHARGER_DISABLE_REG_VAL 0x03 | |
110 | #define EXTERNAL_CHARGER_ENABLE_REG_VAL 0x07 | |
b0163222 | 111 | |
84edbeea AM |
112 | /* UsbLineStatus register - usb types */ |
113 | enum ab8500_charger_link_status { | |
114 | USB_STAT_NOT_CONFIGURED, | |
115 | USB_STAT_STD_HOST_NC, | |
116 | USB_STAT_STD_HOST_C_NS, | |
117 | USB_STAT_STD_HOST_C_S, | |
118 | USB_STAT_HOST_CHG_NM, | |
119 | USB_STAT_HOST_CHG_HS, | |
120 | USB_STAT_HOST_CHG_HS_CHIRP, | |
121 | USB_STAT_DEDICATED_CHG, | |
122 | USB_STAT_ACA_RID_A, | |
123 | USB_STAT_ACA_RID_B, | |
124 | USB_STAT_ACA_RID_C_NM, | |
125 | USB_STAT_ACA_RID_C_HS, | |
126 | USB_STAT_ACA_RID_C_HS_CHIRP, | |
127 | USB_STAT_HM_IDGND, | |
128 | USB_STAT_RESERVED, | |
129 | USB_STAT_NOT_VALID_LINK, | |
74a8e349 HB |
130 | USB_STAT_PHY_EN, |
131 | USB_STAT_SUP_NO_IDGND_VBUS, | |
132 | USB_STAT_SUP_IDGND_VBUS, | |
133 | USB_STAT_CHARGER_LINE_1, | |
134 | USB_STAT_CARKIT_1, | |
135 | USB_STAT_CARKIT_2, | |
136 | USB_STAT_ACA_DOCK_CHARGER, | |
84edbeea AM |
137 | }; |
138 | ||
139 | enum ab8500_usb_state { | |
140 | AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */ | |
141 | AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */ | |
142 | AB8500_BM_USB_STATE_CONFIGURED, | |
143 | AB8500_BM_USB_STATE_SUSPEND, | |
144 | AB8500_BM_USB_STATE_RESUME, | |
145 | AB8500_BM_USB_STATE_MAX, | |
146 | }; | |
147 | ||
148 | /* VBUS input current limits supported in AB8500 in mA */ | |
149 | #define USB_CH_IP_CUR_LVL_0P05 50 | |
150 | #define USB_CH_IP_CUR_LVL_0P09 98 | |
151 | #define USB_CH_IP_CUR_LVL_0P19 193 | |
152 | #define USB_CH_IP_CUR_LVL_0P29 290 | |
153 | #define USB_CH_IP_CUR_LVL_0P38 380 | |
154 | #define USB_CH_IP_CUR_LVL_0P45 450 | |
155 | #define USB_CH_IP_CUR_LVL_0P5 500 | |
156 | #define USB_CH_IP_CUR_LVL_0P6 600 | |
157 | #define USB_CH_IP_CUR_LVL_0P7 700 | |
158 | #define USB_CH_IP_CUR_LVL_0P8 800 | |
159 | #define USB_CH_IP_CUR_LVL_0P9 900 | |
160 | #define USB_CH_IP_CUR_LVL_1P0 1000 | |
161 | #define USB_CH_IP_CUR_LVL_1P1 1100 | |
162 | #define USB_CH_IP_CUR_LVL_1P3 1300 | |
163 | #define USB_CH_IP_CUR_LVL_1P4 1400 | |
164 | #define USB_CH_IP_CUR_LVL_1P5 1500 | |
165 | ||
166 | #define VBAT_TRESH_IP_CUR_RED 3800 | |
167 | ||
168 | #define to_ab8500_charger_usb_device_info(x) container_of((x), \ | |
169 | struct ab8500_charger, usb_chg) | |
170 | #define to_ab8500_charger_ac_device_info(x) container_of((x), \ | |
171 | struct ab8500_charger, ac_chg) | |
172 | ||
173 | /** | |
174 | * struct ab8500_charger_interrupts - ab8500 interupts | |
175 | * @name: name of the interrupt | |
176 | * @isr function pointer to the isr | |
177 | */ | |
178 | struct ab8500_charger_interrupts { | |
179 | char *name; | |
180 | irqreturn_t (*isr)(int irq, void *data); | |
181 | }; | |
182 | ||
183 | struct ab8500_charger_info { | |
184 | int charger_connected; | |
185 | int charger_online; | |
186 | int charger_voltage; | |
187 | int cv_active; | |
188 | bool wd_expired; | |
a864c5a8 | 189 | int charger_current; |
84edbeea AM |
190 | }; |
191 | ||
192 | struct ab8500_charger_event_flags { | |
193 | bool mainextchnotok; | |
194 | bool main_thermal_prot; | |
195 | bool usb_thermal_prot; | |
196 | bool vbus_ovv; | |
197 | bool usbchargernotok; | |
198 | bool chgwdexp; | |
199 | bool vbus_collapse; | |
34c11a70 | 200 | bool vbus_drop_end; |
84edbeea AM |
201 | }; |
202 | ||
203 | struct ab8500_charger_usb_state { | |
84edbeea | 204 | int usb_current; |
34c11a70 | 205 | int usb_current_tmp; |
84edbeea | 206 | enum ab8500_usb_state state; |
34c11a70 | 207 | enum ab8500_usb_state state_tmp; |
84edbeea AM |
208 | spinlock_t usb_lock; |
209 | }; | |
210 | ||
f7470b5d LJ |
211 | struct ab8500_charger_max_usb_in_curr { |
212 | int usb_type_max; | |
213 | int set_max; | |
214 | int calculated_max; | |
215 | }; | |
216 | ||
84edbeea AM |
217 | /** |
218 | * struct ab8500_charger - ab8500 Charger device information | |
219 | * @dev: Pointer to the structure device | |
84edbeea AM |
220 | * @vbus_detected: VBUS detected |
221 | * @vbus_detected_start: | |
222 | * VBUS detected during startup | |
223 | * @ac_conn: This will be true when the AC charger has been plugged | |
224 | * @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC | |
225 | * charger is enabled | |
226 | * @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB | |
227 | * charger is enabled | |
228 | * @vbat Battery voltage | |
229 | * @old_vbat Previously measured battery voltage | |
4b45f4a9 | 230 | * @usb_device_is_unrecognised USB device is unrecognised by the hardware |
84edbeea | 231 | * @autopower Indicate if we should have automatic pwron after pwrloss |
4aef72db | 232 | * @autopower_cfg platform specific power config support for "pwron after pwrloss" |
ff38090a | 233 | * @invalid_charger_detect_state State when forcing AB to use invalid charger |
34c11a70 POH |
234 | * @is_aca_rid: Incicate if accessory is ACA type |
235 | * @current_stepping_sessions: | |
236 | * Counter for current stepping sessions | |
84edbeea AM |
237 | * @parent: Pointer to the struct ab8500 |
238 | * @gpadc: Pointer to the struct gpadc | |
b0284de0 | 239 | * @bm: Platform specific battery management information |
84edbeea AM |
240 | * @flags: Structure for information about events triggered |
241 | * @usb_state: Structure for usb stack information | |
f7470b5d | 242 | * @max_usb_in_curr: Max USB charger input current |
84edbeea AM |
243 | * @ac_chg: AC charger power supply |
244 | * @usb_chg: USB charger power supply | |
245 | * @ac: Structure that holds the AC charger properties | |
246 | * @usb: Structure that holds the USB charger properties | |
247 | * @regu: Pointer to the struct regulator | |
248 | * @charger_wq: Work queue for the IRQs and checking HW state | |
34c11a70 POH |
249 | * @usb_ipt_crnt_lock: Lock to protect VBUS input current setting from mutuals |
250 | * @pm_lock: Lock to prevent system to suspend | |
84edbeea AM |
251 | * @check_vbat_work Work for checking vbat threshold to adjust vbus current |
252 | * @check_hw_failure_work: Work for checking HW state | |
253 | * @check_usbchgnotok_work: Work for checking USB charger not ok status | |
254 | * @kick_wd_work: Work for kicking the charger watchdog in case | |
255 | * of ABB rev 1.* due to the watchog logic bug | |
b269fff4 LJ |
256 | * @ac_charger_attached_work: Work for checking if AC charger is still |
257 | * connected | |
258 | * @usb_charger_attached_work: Work for checking if USB charger is still | |
259 | * connected | |
84edbeea AM |
260 | * @ac_work: Work for checking AC charger connection |
261 | * @detect_usb_type_work: Work for detecting the USB type connected | |
262 | * @usb_link_status_work: Work for checking the new USB link status | |
263 | * @usb_state_changed_work: Work for checking USB state | |
34c11a70 POH |
264 | * @attach_work: Work for detecting USB type |
265 | * @vbus_drop_end_work: Work for detecting VBUS drop end | |
84edbeea AM |
266 | * @check_main_thermal_prot_work: |
267 | * Work for checking Main thermal status | |
268 | * @check_usb_thermal_prot_work: | |
269 | * Work for checking USB thermal status | |
b269fff4 | 270 | * @charger_attached_mutex: For controlling the wakelock |
84edbeea AM |
271 | */ |
272 | struct ab8500_charger { | |
273 | struct device *dev; | |
84edbeea AM |
274 | bool vbus_detected; |
275 | bool vbus_detected_start; | |
276 | bool ac_conn; | |
277 | bool vddadc_en_ac; | |
278 | bool vddadc_en_usb; | |
279 | int vbat; | |
280 | int old_vbat; | |
4b45f4a9 | 281 | bool usb_device_is_unrecognised; |
84edbeea | 282 | bool autopower; |
4aef72db | 283 | bool autopower_cfg; |
ff38090a | 284 | int invalid_charger_detect_state; |
34c11a70 POH |
285 | int is_aca_rid; |
286 | atomic_t current_stepping_sessions; | |
84edbeea AM |
287 | struct ab8500 *parent; |
288 | struct ab8500_gpadc *gpadc; | |
b0284de0 | 289 | struct abx500_bm_data *bm; |
84edbeea AM |
290 | struct ab8500_charger_event_flags flags; |
291 | struct ab8500_charger_usb_state usb_state; | |
f7470b5d | 292 | struct ab8500_charger_max_usb_in_curr max_usb_in_curr; |
84edbeea AM |
293 | struct ux500_charger ac_chg; |
294 | struct ux500_charger usb_chg; | |
295 | struct ab8500_charger_info ac; | |
296 | struct ab8500_charger_info usb; | |
297 | struct regulator *regu; | |
298 | struct workqueue_struct *charger_wq; | |
34c11a70 | 299 | struct mutex usb_ipt_crnt_lock; |
84edbeea AM |
300 | struct delayed_work check_vbat_work; |
301 | struct delayed_work check_hw_failure_work; | |
302 | struct delayed_work check_usbchgnotok_work; | |
303 | struct delayed_work kick_wd_work; | |
34c11a70 | 304 | struct delayed_work usb_state_changed_work; |
4b45f4a9 | 305 | struct delayed_work attach_work; |
b269fff4 LJ |
306 | struct delayed_work ac_charger_attached_work; |
307 | struct delayed_work usb_charger_attached_work; | |
34c11a70 | 308 | struct delayed_work vbus_drop_end_work; |
84edbeea AM |
309 | struct work_struct ac_work; |
310 | struct work_struct detect_usb_type_work; | |
311 | struct work_struct usb_link_status_work; | |
84edbeea AM |
312 | struct work_struct check_main_thermal_prot_work; |
313 | struct work_struct check_usb_thermal_prot_work; | |
efd71c89 | 314 | struct usb_phy *usb_phy; |
84edbeea | 315 | struct notifier_block nb; |
b269fff4 | 316 | struct mutex charger_attached_mutex; |
84edbeea AM |
317 | }; |
318 | ||
319 | /* AC properties */ | |
320 | static enum power_supply_property ab8500_charger_ac_props[] = { | |
321 | POWER_SUPPLY_PROP_HEALTH, | |
322 | POWER_SUPPLY_PROP_PRESENT, | |
323 | POWER_SUPPLY_PROP_ONLINE, | |
324 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
325 | POWER_SUPPLY_PROP_VOLTAGE_AVG, | |
326 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
327 | }; | |
328 | ||
329 | /* USB properties */ | |
330 | static enum power_supply_property ab8500_charger_usb_props[] = { | |
331 | POWER_SUPPLY_PROP_HEALTH, | |
332 | POWER_SUPPLY_PROP_CURRENT_AVG, | |
333 | POWER_SUPPLY_PROP_PRESENT, | |
334 | POWER_SUPPLY_PROP_ONLINE, | |
335 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
336 | POWER_SUPPLY_PROP_VOLTAGE_AVG, | |
337 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
338 | }; | |
339 | ||
defbfa9c POH |
340 | /* |
341 | * Function for enabling and disabling sw fallback mode | |
342 | * should always be disabled when no charger is connected. | |
84edbeea | 343 | */ |
defbfa9c POH |
344 | static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di, |
345 | bool fallback) | |
84edbeea | 346 | { |
b0163222 | 347 | u8 val; |
84edbeea | 348 | u8 reg; |
b0163222 NG |
349 | u8 bank; |
350 | u8 bit; | |
84edbeea AM |
351 | int ret; |
352 | ||
defbfa9c | 353 | dev_dbg(di->dev, "SW Fallback: %d\n", fallback); |
84edbeea | 354 | |
b0163222 NG |
355 | if (is_ab8500(di->parent)) { |
356 | bank = 0x15; | |
357 | reg = 0x0; | |
358 | bit = 3; | |
359 | } else { | |
360 | bank = AB8500_SYS_CTRL1_BLOCK; | |
361 | reg = AB8500_SW_CONTROL_FALLBACK; | |
362 | bit = 0; | |
363 | } | |
364 | ||
defbfa9c | 365 | /* read the register containing fallback bit */ |
b0163222 NG |
366 | ret = abx500_get_register_interruptible(di->dev, bank, reg, &val); |
367 | if (ret < 0) { | |
368 | dev_err(di->dev, "%d read failed\n", __LINE__); | |
84edbeea AM |
369 | return; |
370 | } | |
371 | ||
b0163222 NG |
372 | if (is_ab8500(di->parent)) { |
373 | /* enable the OPT emulation registers */ | |
374 | ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2); | |
375 | if (ret) { | |
376 | dev_err(di->dev, "%d write failed\n", __LINE__); | |
377 | goto disable_otp; | |
378 | } | |
84edbeea AM |
379 | } |
380 | ||
defbfa9c | 381 | if (fallback) |
b0163222 | 382 | val |= (1 << bit); |
84edbeea | 383 | else |
b0163222 | 384 | val &= ~(1 << bit); |
84edbeea | 385 | |
defbfa9c | 386 | /* write back the changed fallback bit value to register */ |
b0163222 | 387 | ret = abx500_set_register_interruptible(di->dev, bank, reg, val); |
84edbeea AM |
388 | if (ret) { |
389 | dev_err(di->dev, "%d write failed\n", __LINE__); | |
84edbeea AM |
390 | } |
391 | ||
b0163222 NG |
392 | disable_otp: |
393 | if (is_ab8500(di->parent)) { | |
394 | /* disable the set OTP registers again */ | |
395 | ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0); | |
396 | if (ret) { | |
397 | dev_err(di->dev, "%d write failed\n", __LINE__); | |
398 | } | |
84edbeea AM |
399 | } |
400 | } | |
401 | ||
402 | /** | |
403 | * ab8500_power_supply_changed - a wrapper with local extentions for | |
404 | * power_supply_changed | |
405 | * @di: pointer to the ab8500_charger structure | |
406 | * @psy: pointer to power_supply_that have changed. | |
407 | * | |
408 | */ | |
409 | static void ab8500_power_supply_changed(struct ab8500_charger *di, | |
410 | struct power_supply *psy) | |
411 | { | |
4aef72db | 412 | if (di->autopower_cfg) { |
84edbeea AM |
413 | if (!di->usb.charger_connected && |
414 | !di->ac.charger_connected && | |
415 | di->autopower) { | |
416 | di->autopower = false; | |
defbfa9c | 417 | ab8500_enable_disable_sw_fallback(di, false); |
84edbeea AM |
418 | } else if (!di->autopower && |
419 | (di->ac.charger_connected || | |
420 | di->usb.charger_connected)) { | |
421 | di->autopower = true; | |
defbfa9c | 422 | ab8500_enable_disable_sw_fallback(di, true); |
84edbeea AM |
423 | } |
424 | } | |
425 | power_supply_changed(psy); | |
426 | } | |
427 | ||
428 | static void ab8500_charger_set_usb_connected(struct ab8500_charger *di, | |
429 | bool connected) | |
430 | { | |
431 | if (connected != di->usb.charger_connected) { | |
432 | dev_dbg(di->dev, "USB connected:%i\n", connected); | |
433 | di->usb.charger_connected = connected; | |
f7470b5d LJ |
434 | |
435 | if (!connected) | |
436 | di->flags.vbus_drop_end = false; | |
437 | ||
84edbeea | 438 | sysfs_notify(&di->usb_chg.psy.dev->kobj, NULL, "present"); |
b269fff4 LJ |
439 | |
440 | if (connected) { | |
441 | mutex_lock(&di->charger_attached_mutex); | |
442 | mutex_unlock(&di->charger_attached_mutex); | |
443 | ||
261c5136 RV |
444 | if (is_ab8500(di->parent)) |
445 | queue_delayed_work(di->charger_wq, | |
b269fff4 LJ |
446 | &di->usb_charger_attached_work, |
447 | HZ); | |
448 | } else { | |
449 | cancel_delayed_work_sync(&di->usb_charger_attached_work); | |
450 | mutex_lock(&di->charger_attached_mutex); | |
451 | mutex_unlock(&di->charger_attached_mutex); | |
452 | } | |
84edbeea AM |
453 | } |
454 | } | |
455 | ||
456 | /** | |
457 | * ab8500_charger_get_ac_voltage() - get ac charger voltage | |
458 | * @di: pointer to the ab8500_charger structure | |
459 | * | |
460 | * Returns ac charger voltage (on success) | |
461 | */ | |
462 | static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di) | |
463 | { | |
464 | int vch; | |
465 | ||
466 | /* Only measure voltage if the charger is connected */ | |
467 | if (di->ac.charger_connected) { | |
468 | vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V); | |
469 | if (vch < 0) | |
470 | dev_err(di->dev, "%s gpadc conv failed,\n", __func__); | |
471 | } else { | |
472 | vch = 0; | |
473 | } | |
474 | return vch; | |
475 | } | |
476 | ||
477 | /** | |
478 | * ab8500_charger_ac_cv() - check if the main charger is in CV mode | |
479 | * @di: pointer to the ab8500_charger structure | |
480 | * | |
481 | * Returns ac charger CV mode (on success) else error code | |
482 | */ | |
483 | static int ab8500_charger_ac_cv(struct ab8500_charger *di) | |
484 | { | |
485 | u8 val; | |
486 | int ret = 0; | |
487 | ||
488 | /* Only check CV mode if the charger is online */ | |
489 | if (di->ac.charger_online) { | |
490 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
491 | AB8500_CH_STATUS1_REG, &val); | |
492 | if (ret < 0) { | |
493 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
494 | return 0; | |
495 | } | |
496 | ||
497 | if (val & MAIN_CH_CV_ON) | |
498 | ret = 1; | |
499 | else | |
500 | ret = 0; | |
501 | } | |
502 | ||
503 | return ret; | |
504 | } | |
505 | ||
506 | /** | |
507 | * ab8500_charger_get_vbus_voltage() - get vbus voltage | |
508 | * @di: pointer to the ab8500_charger structure | |
509 | * | |
510 | * This function returns the vbus voltage. | |
511 | * Returns vbus voltage (on success) | |
512 | */ | |
513 | static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di) | |
514 | { | |
515 | int vch; | |
516 | ||
517 | /* Only measure voltage if the charger is connected */ | |
518 | if (di->usb.charger_connected) { | |
519 | vch = ab8500_gpadc_convert(di->gpadc, VBUS_V); | |
520 | if (vch < 0) | |
521 | dev_err(di->dev, "%s gpadc conv failed\n", __func__); | |
522 | } else { | |
523 | vch = 0; | |
524 | } | |
525 | return vch; | |
526 | } | |
527 | ||
528 | /** | |
529 | * ab8500_charger_get_usb_current() - get usb charger current | |
530 | * @di: pointer to the ab8500_charger structure | |
531 | * | |
532 | * This function returns the usb charger current. | |
533 | * Returns usb current (on success) and error code on failure | |
534 | */ | |
535 | static int ab8500_charger_get_usb_current(struct ab8500_charger *di) | |
536 | { | |
537 | int ich; | |
538 | ||
539 | /* Only measure current if the charger is online */ | |
540 | if (di->usb.charger_online) { | |
541 | ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C); | |
542 | if (ich < 0) | |
543 | dev_err(di->dev, "%s gpadc conv failed\n", __func__); | |
544 | } else { | |
545 | ich = 0; | |
546 | } | |
547 | return ich; | |
548 | } | |
549 | ||
550 | /** | |
551 | * ab8500_charger_get_ac_current() - get ac charger current | |
552 | * @di: pointer to the ab8500_charger structure | |
553 | * | |
554 | * This function returns the ac charger current. | |
555 | * Returns ac current (on success) and error code on failure. | |
556 | */ | |
557 | static int ab8500_charger_get_ac_current(struct ab8500_charger *di) | |
558 | { | |
559 | int ich; | |
560 | ||
561 | /* Only measure current if the charger is online */ | |
562 | if (di->ac.charger_online) { | |
563 | ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C); | |
564 | if (ich < 0) | |
565 | dev_err(di->dev, "%s gpadc conv failed\n", __func__); | |
566 | } else { | |
567 | ich = 0; | |
568 | } | |
569 | return ich; | |
570 | } | |
571 | ||
572 | /** | |
573 | * ab8500_charger_usb_cv() - check if the usb charger is in CV mode | |
574 | * @di: pointer to the ab8500_charger structure | |
575 | * | |
576 | * Returns ac charger CV mode (on success) else error code | |
577 | */ | |
578 | static int ab8500_charger_usb_cv(struct ab8500_charger *di) | |
579 | { | |
580 | int ret; | |
581 | u8 val; | |
582 | ||
583 | /* Only check CV mode if the charger is online */ | |
584 | if (di->usb.charger_online) { | |
585 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
586 | AB8500_CH_USBCH_STAT1_REG, &val); | |
587 | if (ret < 0) { | |
588 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
589 | return 0; | |
590 | } | |
591 | ||
592 | if (val & USB_CH_CV_ON) | |
593 | ret = 1; | |
594 | else | |
595 | ret = 0; | |
596 | } else { | |
597 | ret = 0; | |
598 | } | |
599 | ||
600 | return ret; | |
601 | } | |
602 | ||
603 | /** | |
604 | * ab8500_charger_detect_chargers() - Detect the connected chargers | |
605 | * @di: pointer to the ab8500_charger structure | |
34c11a70 | 606 | * @probe: if probe, don't delay and wait for HW |
84edbeea AM |
607 | * |
608 | * Returns the type of charger connected. | |
609 | * For USB it will not mean we can actually charge from it | |
610 | * but that there is a USB cable connected that we have to | |
611 | * identify. This is used during startup when we don't get | |
612 | * interrupts of the charger detection | |
613 | * | |
614 | * Returns an integer value, that means, | |
615 | * NO_PW_CONN no power supply is connected | |
616 | * AC_PW_CONN if the AC power supply is connected | |
617 | * USB_PW_CONN if the USB power supply is connected | |
618 | * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected | |
619 | */ | |
34c11a70 | 620 | static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe) |
84edbeea AM |
621 | { |
622 | int result = NO_PW_CONN; | |
623 | int ret; | |
624 | u8 val; | |
625 | ||
626 | /* Check for AC charger */ | |
627 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
628 | AB8500_CH_STATUS1_REG, &val); | |
629 | if (ret < 0) { | |
630 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
631 | return ret; | |
632 | } | |
633 | ||
634 | if (val & MAIN_CH_DET) | |
635 | result = AC_PW_CONN; | |
636 | ||
637 | /* Check for USB charger */ | |
34c11a70 POH |
638 | |
639 | if (!probe) { | |
640 | /* | |
641 | * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100 | |
642 | * when disconnecting ACA even though no | |
643 | * charger was connected. Try waiting a little | |
644 | * longer than the 100 ms of VBUS_DET_DBNC100... | |
645 | */ | |
646 | msleep(110); | |
647 | } | |
84edbeea AM |
648 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, |
649 | AB8500_CH_USBCH_STAT1_REG, &val); | |
650 | if (ret < 0) { | |
651 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
652 | return ret; | |
653 | } | |
34c11a70 POH |
654 | dev_dbg(di->dev, |
655 | "%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__, | |
656 | val); | |
84edbeea AM |
657 | if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100)) |
658 | result |= USB_PW_CONN; | |
659 | ||
660 | return result; | |
661 | } | |
662 | ||
663 | /** | |
664 | * ab8500_charger_max_usb_curr() - get the max curr for the USB type | |
665 | * @di: pointer to the ab8500_charger structure | |
666 | * @link_status: the identified USB type | |
667 | * | |
668 | * Get the maximum current that is allowed to be drawn from the host | |
669 | * based on the USB type. | |
670 | * Returns error code in case of failure else 0 on success | |
671 | */ | |
672 | static int ab8500_charger_max_usb_curr(struct ab8500_charger *di, | |
74a8e349 | 673 | enum ab8500_charger_link_status link_status) |
84edbeea AM |
674 | { |
675 | int ret = 0; | |
676 | ||
4b45f4a9 MC |
677 | di->usb_device_is_unrecognised = false; |
678 | ||
34c11a70 POH |
679 | /* |
680 | * Platform only supports USB 2.0. | |
681 | * This means that charging current from USB source | |
682 | * is maximum 500 mA. Every occurence of USB_STAT_*_HOST_* | |
683 | * should set USB_CH_IP_CUR_LVL_0P5. | |
684 | */ | |
685 | ||
84edbeea AM |
686 | switch (link_status) { |
687 | case USB_STAT_STD_HOST_NC: | |
688 | case USB_STAT_STD_HOST_C_NS: | |
689 | case USB_STAT_STD_HOST_C_S: | |
690 | dev_dbg(di->dev, "USB Type - Standard host is " | |
34c11a70 | 691 | "detected through USB driver\n"); |
f7470b5d | 692 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
34c11a70 | 693 | di->is_aca_rid = 0; |
84edbeea AM |
694 | break; |
695 | case USB_STAT_HOST_CHG_HS_CHIRP: | |
f7470b5d | 696 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
34c11a70 | 697 | di->is_aca_rid = 0; |
84edbeea AM |
698 | break; |
699 | case USB_STAT_HOST_CHG_HS: | |
f7470b5d | 700 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
34c11a70 POH |
701 | di->is_aca_rid = 0; |
702 | break; | |
84edbeea | 703 | case USB_STAT_ACA_RID_C_HS: |
f7470b5d | 704 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P9; |
34c11a70 | 705 | di->is_aca_rid = 0; |
84edbeea AM |
706 | break; |
707 | case USB_STAT_ACA_RID_A: | |
708 | /* | |
709 | * Dedicated charger level minus maximum current accessory | |
34c11a70 | 710 | * can consume (900mA). Closest level is 500mA |
84edbeea | 711 | */ |
34c11a70 | 712 | dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n"); |
f7470b5d | 713 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
34c11a70 | 714 | di->is_aca_rid = 1; |
84edbeea AM |
715 | break; |
716 | case USB_STAT_ACA_RID_B: | |
717 | /* | |
718 | * Dedicated charger level minus 120mA (20mA for ACA and | |
719 | * 100mA for potential accessory). Closest level is 1300mA | |
720 | */ | |
f7470b5d | 721 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P3; |
74a8e349 | 722 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, |
f7470b5d | 723 | di->max_usb_in_curr.usb_type_max); |
34c11a70 | 724 | di->is_aca_rid = 1; |
84edbeea | 725 | break; |
84edbeea | 726 | case USB_STAT_HOST_CHG_NM: |
f7470b5d | 727 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
34c11a70 POH |
728 | di->is_aca_rid = 0; |
729 | break; | |
74a8e349 | 730 | case USB_STAT_DEDICATED_CHG: |
f7470b5d | 731 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5; |
34c11a70 POH |
732 | di->is_aca_rid = 0; |
733 | break; | |
74a8e349 | 734 | case USB_STAT_ACA_RID_C_HS_CHIRP: |
34c11a70 | 735 | case USB_STAT_ACA_RID_C_NM: |
f7470b5d | 736 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5; |
34c11a70 | 737 | di->is_aca_rid = 1; |
84edbeea | 738 | break; |
4b45f4a9 MC |
739 | case USB_STAT_NOT_CONFIGURED: |
740 | if (di->vbus_detected) { | |
741 | di->usb_device_is_unrecognised = true; | |
742 | dev_dbg(di->dev, "USB Type - Legacy charger.\n"); | |
f7470b5d LJ |
743 | di->max_usb_in_curr.usb_type_max = |
744 | USB_CH_IP_CUR_LVL_1P5; | |
4b45f4a9 MC |
745 | break; |
746 | } | |
84edbeea | 747 | case USB_STAT_HM_IDGND: |
84edbeea | 748 | dev_err(di->dev, "USB Type - Charging not allowed\n"); |
f7470b5d | 749 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05; |
84edbeea AM |
750 | ret = -ENXIO; |
751 | break; | |
74a8e349 HB |
752 | case USB_STAT_RESERVED: |
753 | if (is_ab8500(di->parent)) { | |
754 | di->flags.vbus_collapse = true; | |
755 | dev_err(di->dev, "USB Type - USB_STAT_RESERVED " | |
756 | "VBUS has collapsed\n"); | |
757 | ret = -ENXIO; | |
758 | break; | |
861a30da | 759 | } else { |
74a8e349 | 760 | dev_dbg(di->dev, "USB Type - Charging not allowed\n"); |
f7470b5d LJ |
761 | di->max_usb_in_curr.usb_type_max = |
762 | USB_CH_IP_CUR_LVL_0P05; | |
74a8e349 | 763 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", |
f7470b5d LJ |
764 | link_status, |
765 | di->max_usb_in_curr.usb_type_max); | |
74a8e349 HB |
766 | ret = -ENXIO; |
767 | break; | |
768 | } | |
74a8e349 HB |
769 | case USB_STAT_CARKIT_1: |
770 | case USB_STAT_CARKIT_2: | |
771 | case USB_STAT_ACA_DOCK_CHARGER: | |
772 | case USB_STAT_CHARGER_LINE_1: | |
f7470b5d | 773 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
74a8e349 | 774 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, |
f7470b5d | 775 | di->max_usb_in_curr.usb_type_max); |
ed5243f8 | 776 | break; |
ff38090a HS |
777 | case USB_STAT_NOT_VALID_LINK: |
778 | dev_err(di->dev, "USB Type invalid - try charging anyway\n"); | |
f7470b5d | 779 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
74a8e349 HB |
780 | break; |
781 | ||
84edbeea AM |
782 | default: |
783 | dev_err(di->dev, "USB Type - Unknown\n"); | |
f7470b5d | 784 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05; |
84edbeea AM |
785 | ret = -ENXIO; |
786 | break; | |
787 | }; | |
788 | ||
f7470b5d | 789 | di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max; |
84edbeea | 790 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", |
f7470b5d | 791 | link_status, di->max_usb_in_curr.set_max); |
84edbeea AM |
792 | |
793 | return ret; | |
794 | } | |
795 | ||
796 | /** | |
797 | * ab8500_charger_read_usb_type() - read the type of usb connected | |
798 | * @di: pointer to the ab8500_charger structure | |
799 | * | |
800 | * Detect the type of the plugged USB | |
801 | * Returns error code in case of failure else 0 on success | |
802 | */ | |
803 | static int ab8500_charger_read_usb_type(struct ab8500_charger *di) | |
804 | { | |
805 | int ret; | |
806 | u8 val; | |
807 | ||
808 | ret = abx500_get_register_interruptible(di->dev, | |
809 | AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val); | |
810 | if (ret < 0) { | |
811 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
812 | return ret; | |
813 | } | |
861a30da | 814 | if (is_ab8500(di->parent)) |
74a8e349 | 815 | ret = abx500_get_register_interruptible(di->dev, AB8500_USB, |
861a30da LJ |
816 | AB8500_USB_LINE_STAT_REG, &val); |
817 | else | |
818 | ret = abx500_get_register_interruptible(di->dev, | |
819 | AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val); | |
84edbeea AM |
820 | if (ret < 0) { |
821 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
822 | return ret; | |
823 | } | |
824 | ||
825 | /* get the USB type */ | |
861a30da LJ |
826 | if (is_ab8500(di->parent)) |
827 | val = (val & AB8500_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT; | |
828 | else | |
829 | val = (val & AB8505_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT; | |
84edbeea AM |
830 | ret = ab8500_charger_max_usb_curr(di, |
831 | (enum ab8500_charger_link_status) val); | |
832 | ||
833 | return ret; | |
834 | } | |
835 | ||
836 | /** | |
837 | * ab8500_charger_detect_usb_type() - get the type of usb connected | |
838 | * @di: pointer to the ab8500_charger structure | |
839 | * | |
840 | * Detect the type of the plugged USB | |
841 | * Returns error code in case of failure else 0 on success | |
842 | */ | |
843 | static int ab8500_charger_detect_usb_type(struct ab8500_charger *di) | |
844 | { | |
845 | int i, ret; | |
846 | u8 val; | |
847 | ||
848 | /* | |
849 | * On getting the VBUS rising edge detect interrupt there | |
850 | * is a 250ms delay after which the register UsbLineStatus | |
851 | * is filled with valid data. | |
852 | */ | |
853 | for (i = 0; i < 10; i++) { | |
854 | msleep(250); | |
855 | ret = abx500_get_register_interruptible(di->dev, | |
856 | AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, | |
857 | &val); | |
34c11a70 POH |
858 | dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n", |
859 | __func__, val); | |
84edbeea AM |
860 | if (ret < 0) { |
861 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
862 | return ret; | |
863 | } | |
74a8e349 | 864 | |
861a30da | 865 | if (is_ab8500(di->parent)) |
74a8e349 HB |
866 | ret = abx500_get_register_interruptible(di->dev, |
867 | AB8500_USB, AB8500_USB_LINE_STAT_REG, &val); | |
861a30da | 868 | else |
74a8e349 HB |
869 | ret = abx500_get_register_interruptible(di->dev, |
870 | AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val); | |
84edbeea AM |
871 | if (ret < 0) { |
872 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
873 | return ret; | |
874 | } | |
34c11a70 POH |
875 | dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__, |
876 | val); | |
84edbeea AM |
877 | /* |
878 | * Until the IT source register is read the UsbLineStatus | |
879 | * register is not updated, hence doing the same | |
880 | * Revisit this: | |
881 | */ | |
882 | ||
883 | /* get the USB type */ | |
861a30da LJ |
884 | if (is_ab8500(di->parent)) |
885 | val = (val & AB8500_USB_LINK_STATUS) >> | |
886 | USB_LINK_STATUS_SHIFT; | |
887 | else | |
888 | val = (val & AB8505_USB_LINK_STATUS) >> | |
889 | USB_LINK_STATUS_SHIFT; | |
84edbeea AM |
890 | if (val) |
891 | break; | |
892 | } | |
893 | ret = ab8500_charger_max_usb_curr(di, | |
894 | (enum ab8500_charger_link_status) val); | |
895 | ||
896 | return ret; | |
897 | } | |
898 | ||
899 | /* | |
900 | * This array maps the raw hex value to charger voltage used by the AB8500 | |
901 | * Values taken from the UM0836 | |
902 | */ | |
903 | static int ab8500_charger_voltage_map[] = { | |
904 | 3500 , | |
905 | 3525 , | |
906 | 3550 , | |
907 | 3575 , | |
908 | 3600 , | |
909 | 3625 , | |
910 | 3650 , | |
911 | 3675 , | |
912 | 3700 , | |
913 | 3725 , | |
914 | 3750 , | |
915 | 3775 , | |
916 | 3800 , | |
917 | 3825 , | |
918 | 3850 , | |
919 | 3875 , | |
920 | 3900 , | |
921 | 3925 , | |
922 | 3950 , | |
923 | 3975 , | |
924 | 4000 , | |
925 | 4025 , | |
926 | 4050 , | |
927 | 4060 , | |
928 | 4070 , | |
929 | 4080 , | |
930 | 4090 , | |
931 | 4100 , | |
932 | 4110 , | |
933 | 4120 , | |
934 | 4130 , | |
935 | 4140 , | |
936 | 4150 , | |
937 | 4160 , | |
938 | 4170 , | |
939 | 4180 , | |
940 | 4190 , | |
941 | 4200 , | |
942 | 4210 , | |
943 | 4220 , | |
944 | 4230 , | |
945 | 4240 , | |
946 | 4250 , | |
947 | 4260 , | |
948 | 4270 , | |
949 | 4280 , | |
950 | 4290 , | |
951 | 4300 , | |
952 | 4310 , | |
953 | 4320 , | |
954 | 4330 , | |
955 | 4340 , | |
956 | 4350 , | |
957 | 4360 , | |
958 | 4370 , | |
959 | 4380 , | |
960 | 4390 , | |
961 | 4400 , | |
962 | 4410 , | |
963 | 4420 , | |
964 | 4430 , | |
965 | 4440 , | |
966 | 4450 , | |
967 | 4460 , | |
968 | 4470 , | |
969 | 4480 , | |
970 | 4490 , | |
971 | 4500 , | |
972 | 4510 , | |
973 | 4520 , | |
974 | 4530 , | |
975 | 4540 , | |
976 | 4550 , | |
977 | 4560 , | |
978 | 4570 , | |
979 | 4580 , | |
980 | 4590 , | |
981 | 4600 , | |
982 | }; | |
983 | ||
84edbeea AM |
984 | static int ab8500_voltage_to_regval(int voltage) |
985 | { | |
986 | int i; | |
987 | ||
988 | /* Special case for voltage below 3.5V */ | |
989 | if (voltage < ab8500_charger_voltage_map[0]) | |
990 | return LOW_VOLT_REG; | |
991 | ||
992 | for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) { | |
993 | if (voltage < ab8500_charger_voltage_map[i]) | |
994 | return i - 1; | |
995 | } | |
996 | ||
997 | /* If not last element, return error */ | |
998 | i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1; | |
999 | if (voltage == ab8500_charger_voltage_map[i]) | |
1000 | return i; | |
1001 | else | |
1002 | return -1; | |
1003 | } | |
1004 | ||
861a30da | 1005 | static int ab8500_current_to_regval(struct ab8500_charger *di, int curr) |
84edbeea AM |
1006 | { |
1007 | int i; | |
1008 | ||
861a30da | 1009 | if (curr < di->bm->chg_output_curr[0]) |
84edbeea AM |
1010 | return 0; |
1011 | ||
861a30da LJ |
1012 | for (i = 0; i < di->bm->n_chg_out_curr; i++) { |
1013 | if (curr < di->bm->chg_output_curr[i]) | |
84edbeea AM |
1014 | return i - 1; |
1015 | } | |
1016 | ||
1017 | /* If not last element, return error */ | |
861a30da LJ |
1018 | i = di->bm->n_chg_out_curr - 1; |
1019 | if (curr == di->bm->chg_output_curr[i]) | |
84edbeea AM |
1020 | return i; |
1021 | else | |
1022 | return -1; | |
1023 | } | |
1024 | ||
861a30da | 1025 | static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr) |
84edbeea AM |
1026 | { |
1027 | int i; | |
1028 | ||
861a30da | 1029 | if (curr < di->bm->chg_input_curr[0]) |
84edbeea AM |
1030 | return 0; |
1031 | ||
861a30da LJ |
1032 | for (i = 0; i < di->bm->n_chg_in_curr; i++) { |
1033 | if (curr < di->bm->chg_input_curr[i]) | |
84edbeea AM |
1034 | return i - 1; |
1035 | } | |
1036 | ||
1037 | /* If not last element, return error */ | |
861a30da LJ |
1038 | i = di->bm->n_chg_in_curr - 1; |
1039 | if (curr == di->bm->chg_input_curr[i]) | |
84edbeea AM |
1040 | return i; |
1041 | else | |
1042 | return -1; | |
1043 | } | |
1044 | ||
1045 | /** | |
1046 | * ab8500_charger_get_usb_cur() - get usb current | |
1047 | * @di: pointer to the ab8500_charger structre | |
1048 | * | |
1049 | * The usb stack provides the maximum current that can be drawn from | |
1050 | * the standard usb host. This will be in mA. | |
1051 | * This function converts current in mA to a value that can be written | |
1052 | * to the register. Returns -1 if charging is not allowed | |
1053 | */ | |
1054 | static int ab8500_charger_get_usb_cur(struct ab8500_charger *di) | |
1055 | { | |
f7470b5d | 1056 | int ret = 0; |
84edbeea AM |
1057 | switch (di->usb_state.usb_current) { |
1058 | case 100: | |
f7470b5d | 1059 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P09; |
84edbeea AM |
1060 | break; |
1061 | case 200: | |
f7470b5d | 1062 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P19; |
84edbeea AM |
1063 | break; |
1064 | case 300: | |
f7470b5d | 1065 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P29; |
84edbeea AM |
1066 | break; |
1067 | case 400: | |
f7470b5d | 1068 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P38; |
84edbeea AM |
1069 | break; |
1070 | case 500: | |
f7470b5d | 1071 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
84edbeea AM |
1072 | break; |
1073 | default: | |
f7470b5d LJ |
1074 | di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05; |
1075 | ret = -EPERM; | |
84edbeea AM |
1076 | break; |
1077 | }; | |
f7470b5d LJ |
1078 | di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max; |
1079 | return ret; | |
1080 | } | |
1081 | ||
1082 | /** | |
1083 | * ab8500_charger_check_continue_stepping() - Check to allow stepping | |
1084 | * @di: pointer to the ab8500_charger structure | |
1085 | * @reg: select what charger register to check | |
1086 | * | |
1087 | * Check if current stepping should be allowed to continue. | |
1088 | * Checks if charger source has not collapsed. If it has, further stepping | |
1089 | * is not allowed. | |
1090 | */ | |
1091 | static bool ab8500_charger_check_continue_stepping(struct ab8500_charger *di, | |
1092 | int reg) | |
1093 | { | |
1094 | if (reg == AB8500_USBCH_IPT_CRNTLVL_REG) | |
1095 | return !di->flags.vbus_drop_end; | |
1096 | else | |
1097 | return true; | |
84edbeea AM |
1098 | } |
1099 | ||
f8e96dff JB |
1100 | /** |
1101 | * ab8500_charger_set_current() - set charger current | |
1102 | * @di: pointer to the ab8500_charger structure | |
1103 | * @ich: charger current, in mA | |
1104 | * @reg: select what charger register to set | |
1105 | * | |
1106 | * Set charger current. | |
1107 | * There is no state machine in the AB to step up/down the charger | |
1108 | * current to avoid dips and spikes on MAIN, VBUS and VBAT when | |
1109 | * charging is started. Instead we need to implement | |
1110 | * this charger current step-up/down here. | |
1111 | * Returns error code in case of failure else 0(on success) | |
1112 | */ | |
1113 | static int ab8500_charger_set_current(struct ab8500_charger *di, | |
1114 | int ich, int reg) | |
1115 | { | |
34c11a70 | 1116 | int ret = 0; |
861a30da | 1117 | int curr_index, prev_curr_index, shift_value, i; |
f8e96dff | 1118 | u8 reg_value; |
34c11a70 POH |
1119 | u32 step_udelay; |
1120 | bool no_stepping = false; | |
1121 | ||
1122 | atomic_inc(&di->current_stepping_sessions); | |
1123 | ||
1124 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
1125 | reg, ®_value); | |
1126 | if (ret < 0) { | |
1127 | dev_err(di->dev, "%s read failed\n", __func__); | |
1128 | goto exit_set_current; | |
1129 | } | |
f8e96dff JB |
1130 | |
1131 | switch (reg) { | |
1132 | case AB8500_MCH_IPT_CURLVL_REG: | |
1133 | shift_value = MAIN_CH_INPUT_CURR_SHIFT; | |
34c11a70 | 1134 | prev_curr_index = (reg_value >> shift_value); |
861a30da | 1135 | curr_index = ab8500_current_to_regval(di, ich); |
34c11a70 POH |
1136 | step_udelay = STEP_UDELAY; |
1137 | if (!di->ac.charger_connected) | |
1138 | no_stepping = true; | |
f8e96dff JB |
1139 | break; |
1140 | case AB8500_USBCH_IPT_CRNTLVL_REG: | |
861a30da LJ |
1141 | if (is_ab8540(di->parent)) |
1142 | shift_value = AB8540_VBUS_IN_CURR_LIM_SHIFT; | |
1143 | else | |
1144 | shift_value = VBUS_IN_CURR_LIM_SHIFT; | |
34c11a70 | 1145 | prev_curr_index = (reg_value >> shift_value); |
861a30da | 1146 | curr_index = ab8500_vbus_in_curr_to_regval(di, ich); |
34c11a70 POH |
1147 | step_udelay = STEP_UDELAY * 100; |
1148 | ||
34c11a70 POH |
1149 | if (!di->usb.charger_connected) |
1150 | no_stepping = true; | |
f8e96dff JB |
1151 | break; |
1152 | case AB8500_CH_OPT_CRNTLVL_REG: | |
1153 | shift_value = 0; | |
34c11a70 | 1154 | prev_curr_index = (reg_value >> shift_value); |
861a30da | 1155 | curr_index = ab8500_current_to_regval(di, ich); |
34c11a70 POH |
1156 | step_udelay = STEP_UDELAY; |
1157 | if (curr_index && (curr_index - prev_curr_index) > 1) | |
1158 | step_udelay *= 100; | |
1159 | ||
1160 | if (!di->usb.charger_connected && !di->ac.charger_connected) | |
1161 | no_stepping = true; | |
1162 | ||
f8e96dff JB |
1163 | break; |
1164 | default: | |
1165 | dev_err(di->dev, "%s current register not valid\n", __func__); | |
34c11a70 POH |
1166 | ret = -ENXIO; |
1167 | goto exit_set_current; | |
f8e96dff JB |
1168 | } |
1169 | ||
1170 | if (curr_index < 0) { | |
1171 | dev_err(di->dev, "requested current limit out-of-range\n"); | |
34c11a70 POH |
1172 | ret = -ENXIO; |
1173 | goto exit_set_current; | |
f8e96dff | 1174 | } |
f8e96dff JB |
1175 | |
1176 | /* only update current if it's been changed */ | |
34c11a70 POH |
1177 | if (prev_curr_index == curr_index) { |
1178 | dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n", | |
1179 | __func__, reg); | |
1180 | ret = 0; | |
1181 | goto exit_set_current; | |
1182 | } | |
f8e96dff JB |
1183 | |
1184 | dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n", | |
1185 | __func__, ich, reg); | |
1186 | ||
34c11a70 POH |
1187 | if (no_stepping) { |
1188 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1189 | reg, (u8)curr_index << shift_value); | |
1190 | if (ret) | |
1191 | dev_err(di->dev, "%s write failed\n", __func__); | |
1192 | } else if (prev_curr_index > curr_index) { | |
f8e96dff | 1193 | for (i = prev_curr_index - 1; i >= curr_index; i--) { |
34c11a70 POH |
1194 | dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n", |
1195 | (u8) i << shift_value, reg); | |
f8e96dff | 1196 | ret = abx500_set_register_interruptible(di->dev, |
34c11a70 | 1197 | AB8500_CHARGER, reg, (u8)i << shift_value); |
f8e96dff JB |
1198 | if (ret) { |
1199 | dev_err(di->dev, "%s write failed\n", __func__); | |
34c11a70 | 1200 | goto exit_set_current; |
f8e96dff | 1201 | } |
34c11a70 POH |
1202 | if (i != curr_index) |
1203 | usleep_range(step_udelay, step_udelay * 2); | |
f8e96dff JB |
1204 | } |
1205 | } else { | |
f7470b5d LJ |
1206 | bool allow = true; |
1207 | for (i = prev_curr_index + 1; i <= curr_index && allow; i++) { | |
34c11a70 POH |
1208 | dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n", |
1209 | (u8)i << shift_value, reg); | |
f8e96dff | 1210 | ret = abx500_set_register_interruptible(di->dev, |
34c11a70 | 1211 | AB8500_CHARGER, reg, (u8)i << shift_value); |
f8e96dff JB |
1212 | if (ret) { |
1213 | dev_err(di->dev, "%s write failed\n", __func__); | |
34c11a70 | 1214 | goto exit_set_current; |
f8e96dff | 1215 | } |
34c11a70 POH |
1216 | if (i != curr_index) |
1217 | usleep_range(step_udelay, step_udelay * 2); | |
f7470b5d LJ |
1218 | |
1219 | allow = ab8500_charger_check_continue_stepping(di, reg); | |
f8e96dff JB |
1220 | } |
1221 | } | |
34c11a70 POH |
1222 | |
1223 | exit_set_current: | |
1224 | atomic_dec(&di->current_stepping_sessions); | |
1225 | ||
f8e96dff JB |
1226 | return ret; |
1227 | } | |
1228 | ||
84edbeea AM |
1229 | /** |
1230 | * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit | |
1231 | * @di: pointer to the ab8500_charger structure | |
1232 | * @ich_in: charger input current limit | |
1233 | * | |
1234 | * Sets the current that can be drawn from the USB host | |
1235 | * Returns error code in case of failure else 0(on success) | |
1236 | */ | |
1237 | static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di, | |
1238 | int ich_in) | |
1239 | { | |
84edbeea | 1240 | int min_value; |
34c11a70 | 1241 | int ret; |
84edbeea AM |
1242 | |
1243 | /* We should always use to lowest current limit */ | |
b0284de0 | 1244 | min_value = min(di->bm->chg_params->usb_curr_max, ich_in); |
f7470b5d LJ |
1245 | if (di->max_usb_in_curr.set_max > 0) |
1246 | min_value = min(di->max_usb_in_curr.set_max, min_value); | |
1247 | ||
1248 | if (di->usb_state.usb_current >= 0) | |
1249 | min_value = min(di->usb_state.usb_current, min_value); | |
84edbeea AM |
1250 | |
1251 | switch (min_value) { | |
1252 | case 100: | |
1253 | if (di->vbat < VBAT_TRESH_IP_CUR_RED) | |
1254 | min_value = USB_CH_IP_CUR_LVL_0P05; | |
1255 | break; | |
1256 | case 500: | |
1257 | if (di->vbat < VBAT_TRESH_IP_CUR_RED) | |
1258 | min_value = USB_CH_IP_CUR_LVL_0P45; | |
1259 | break; | |
1260 | default: | |
1261 | break; | |
1262 | } | |
1263 | ||
34c11a70 POH |
1264 | dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value); |
1265 | ||
1266 | mutex_lock(&di->usb_ipt_crnt_lock); | |
1267 | ret = ab8500_charger_set_current(di, min_value, | |
f8e96dff | 1268 | AB8500_USBCH_IPT_CRNTLVL_REG); |
34c11a70 POH |
1269 | mutex_unlock(&di->usb_ipt_crnt_lock); |
1270 | ||
1271 | return ret; | |
f8e96dff | 1272 | } |
84edbeea | 1273 | |
f8e96dff JB |
1274 | /** |
1275 | * ab8500_charger_set_main_in_curr() - set main charger input current | |
1276 | * @di: pointer to the ab8500_charger structure | |
1277 | * @ich_in: input charger current, in mA | |
1278 | * | |
1279 | * Set main charger input current. | |
1280 | * Returns error code in case of failure else 0(on success) | |
1281 | */ | |
1282 | static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di, | |
1283 | int ich_in) | |
1284 | { | |
1285 | return ab8500_charger_set_current(di, ich_in, | |
1286 | AB8500_MCH_IPT_CURLVL_REG); | |
1287 | } | |
84edbeea | 1288 | |
f8e96dff JB |
1289 | /** |
1290 | * ab8500_charger_set_output_curr() - set charger output current | |
1291 | * @di: pointer to the ab8500_charger structure | |
1292 | * @ich_out: output charger current, in mA | |
1293 | * | |
1294 | * Set charger output current. | |
1295 | * Returns error code in case of failure else 0(on success) | |
1296 | */ | |
1297 | static int ab8500_charger_set_output_curr(struct ab8500_charger *di, | |
1298 | int ich_out) | |
1299 | { | |
1300 | return ab8500_charger_set_current(di, ich_out, | |
1301 | AB8500_CH_OPT_CRNTLVL_REG); | |
84edbeea AM |
1302 | } |
1303 | ||
1304 | /** | |
1305 | * ab8500_charger_led_en() - turn on/off chargign led | |
1306 | * @di: pointer to the ab8500_charger structure | |
1307 | * @on: flag to turn on/off the chargign led | |
1308 | * | |
1309 | * Power ON/OFF charging LED indication | |
1310 | * Returns error code in case of failure else 0(on success) | |
1311 | */ | |
1312 | static int ab8500_charger_led_en(struct ab8500_charger *di, int on) | |
1313 | { | |
1314 | int ret; | |
1315 | ||
1316 | if (on) { | |
1317 | /* Power ON charging LED indicator, set LED current to 5mA */ | |
1318 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1319 | AB8500_LED_INDICATOR_PWM_CTRL, | |
1320 | (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA)); | |
1321 | if (ret) { | |
1322 | dev_err(di->dev, "Power ON LED failed\n"); | |
1323 | return ret; | |
1324 | } | |
1325 | /* LED indicator PWM duty cycle 252/256 */ | |
1326 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1327 | AB8500_LED_INDICATOR_PWM_DUTY, | |
1328 | LED_INDICATOR_PWM_DUTY_252_256); | |
1329 | if (ret) { | |
1330 | dev_err(di->dev, "Set LED PWM duty cycle failed\n"); | |
1331 | return ret; | |
1332 | } | |
1333 | } else { | |
1334 | /* Power off charging LED indicator */ | |
1335 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1336 | AB8500_LED_INDICATOR_PWM_CTRL, | |
1337 | LED_INDICATOR_PWM_DIS); | |
1338 | if (ret) { | |
1339 | dev_err(di->dev, "Power-off LED failed\n"); | |
1340 | return ret; | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | return ret; | |
1345 | } | |
1346 | ||
1347 | /** | |
1348 | * ab8500_charger_ac_en() - enable or disable ac charging | |
1349 | * @di: pointer to the ab8500_charger structure | |
1350 | * @enable: enable/disable flag | |
1351 | * @vset: charging voltage | |
1352 | * @iset: charging current | |
1353 | * | |
1354 | * Enable/Disable AC/Mains charging and turns on/off the charging led | |
1355 | * respectively. | |
1356 | **/ | |
1357 | static int ab8500_charger_ac_en(struct ux500_charger *charger, | |
1358 | int enable, int vset, int iset) | |
1359 | { | |
1360 | int ret; | |
1361 | int volt_index; | |
1362 | int curr_index; | |
1363 | int input_curr_index; | |
1364 | u8 overshoot = 0; | |
1365 | ||
1366 | struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger); | |
1367 | ||
1368 | if (enable) { | |
1369 | /* Check if AC is connected */ | |
1370 | if (!di->ac.charger_connected) { | |
1371 | dev_err(di->dev, "AC charger not connected\n"); | |
1372 | return -ENXIO; | |
1373 | } | |
1374 | ||
1375 | /* Enable AC charging */ | |
1376 | dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset); | |
1377 | ||
1378 | /* | |
1379 | * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts | |
1380 | * will be triggered everytime we enable the VDD ADC supply. | |
1381 | * This will turn off charging for a short while. | |
1382 | * It can be avoided by having the supply on when | |
1383 | * there is a charger enabled. Normally the VDD ADC supply | |
1384 | * is enabled everytime a GPADC conversion is triggered. We will | |
1385 | * force it to be enabled from this driver to have | |
1386 | * the GPADC module independant of the AB8500 chargers | |
1387 | */ | |
1388 | if (!di->vddadc_en_ac) { | |
6de7ef3e SK |
1389 | ret = regulator_enable(di->regu); |
1390 | if (ret) | |
1391 | dev_warn(di->dev, | |
1392 | "Failed to enable regulator\n"); | |
1393 | else | |
1394 | di->vddadc_en_ac = true; | |
84edbeea AM |
1395 | } |
1396 | ||
1397 | /* Check if the requested voltage or current is valid */ | |
1398 | volt_index = ab8500_voltage_to_regval(vset); | |
861a30da LJ |
1399 | curr_index = ab8500_current_to_regval(di, iset); |
1400 | input_curr_index = ab8500_current_to_regval(di, | |
b0284de0 | 1401 | di->bm->chg_params->ac_curr_max); |
84edbeea AM |
1402 | if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) { |
1403 | dev_err(di->dev, | |
1404 | "Charger voltage or current too high, " | |
1405 | "charging not started\n"); | |
1406 | return -ENXIO; | |
1407 | } | |
1408 | ||
1409 | /* ChVoltLevel: maximum battery charging voltage */ | |
1410 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1411 | AB8500_CH_VOLT_LVL_REG, (u8) volt_index); | |
1412 | if (ret) { | |
1413 | dev_err(di->dev, "%s write failed\n", __func__); | |
1414 | return ret; | |
1415 | } | |
1416 | /* MainChInputCurr: current that can be drawn from the charger*/ | |
f8e96dff | 1417 | ret = ab8500_charger_set_main_in_curr(di, |
b0284de0 | 1418 | di->bm->chg_params->ac_curr_max); |
84edbeea | 1419 | if (ret) { |
f8e96dff JB |
1420 | dev_err(di->dev, "%s Failed to set MainChInputCurr\n", |
1421 | __func__); | |
84edbeea AM |
1422 | return ret; |
1423 | } | |
1424 | /* ChOutputCurentLevel: protected output current */ | |
f8e96dff | 1425 | ret = ab8500_charger_set_output_curr(di, iset); |
84edbeea | 1426 | if (ret) { |
f8e96dff JB |
1427 | dev_err(di->dev, "%s " |
1428 | "Failed to set ChOutputCurentLevel\n", | |
1429 | __func__); | |
84edbeea AM |
1430 | return ret; |
1431 | } | |
1432 | ||
1433 | /* Check if VBAT overshoot control should be enabled */ | |
b0284de0 | 1434 | if (!di->bm->enable_overshoot) |
84edbeea AM |
1435 | overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N; |
1436 | ||
1437 | /* Enable Main Charger */ | |
1438 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1439 | AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot); | |
1440 | if (ret) { | |
1441 | dev_err(di->dev, "%s write failed\n", __func__); | |
1442 | return ret; | |
1443 | } | |
1444 | ||
1445 | /* Power on charging LED indication */ | |
1446 | ret = ab8500_charger_led_en(di, true); | |
1447 | if (ret < 0) | |
1448 | dev_err(di->dev, "failed to enable LED\n"); | |
1449 | ||
1450 | di->ac.charger_online = 1; | |
1451 | } else { | |
1452 | /* Disable AC charging */ | |
1453 | if (is_ab8500_1p1_or_earlier(di->parent)) { | |
1454 | /* | |
1455 | * For ABB revision 1.0 and 1.1 there is a bug in the | |
1456 | * watchdog logic. That means we have to continously | |
1457 | * kick the charger watchdog even when no charger is | |
1458 | * connected. This is only valid once the AC charger | |
1459 | * has been enabled. This is a bug that is not handled | |
1460 | * by the algorithm and the watchdog have to be kicked | |
1461 | * by the charger driver when the AC charger | |
1462 | * is disabled | |
1463 | */ | |
1464 | if (di->ac_conn) { | |
1465 | queue_delayed_work(di->charger_wq, | |
1466 | &di->kick_wd_work, | |
1467 | round_jiffies(WD_KICK_INTERVAL)); | |
1468 | } | |
1469 | ||
1470 | /* | |
1471 | * We can't turn off charging completely | |
1472 | * due to a bug in AB8500 cut1. | |
1473 | * If we do, charging will not start again. | |
1474 | * That is why we set the lowest voltage | |
1475 | * and current possible | |
1476 | */ | |
1477 | ret = abx500_set_register_interruptible(di->dev, | |
1478 | AB8500_CHARGER, | |
1479 | AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5); | |
1480 | if (ret) { | |
1481 | dev_err(di->dev, | |
1482 | "%s write failed\n", __func__); | |
1483 | return ret; | |
1484 | } | |
1485 | ||
f8e96dff | 1486 | ret = ab8500_charger_set_output_curr(di, 0); |
84edbeea | 1487 | if (ret) { |
f8e96dff JB |
1488 | dev_err(di->dev, "%s " |
1489 | "Failed to set ChOutputCurentLevel\n", | |
1490 | __func__); | |
84edbeea AM |
1491 | return ret; |
1492 | } | |
1493 | } else { | |
1494 | ret = abx500_set_register_interruptible(di->dev, | |
1495 | AB8500_CHARGER, | |
1496 | AB8500_MCH_CTRL1, 0); | |
1497 | if (ret) { | |
1498 | dev_err(di->dev, | |
1499 | "%s write failed\n", __func__); | |
1500 | return ret; | |
1501 | } | |
1502 | } | |
1503 | ||
1504 | ret = ab8500_charger_led_en(di, false); | |
1505 | if (ret < 0) | |
1506 | dev_err(di->dev, "failed to disable LED\n"); | |
1507 | ||
1508 | di->ac.charger_online = 0; | |
1509 | di->ac.wd_expired = false; | |
1510 | ||
1511 | /* Disable regulator if enabled */ | |
1512 | if (di->vddadc_en_ac) { | |
1513 | regulator_disable(di->regu); | |
1514 | di->vddadc_en_ac = false; | |
1515 | } | |
1516 | ||
1517 | dev_dbg(di->dev, "%s Disabled AC charging\n", __func__); | |
1518 | } | |
1519 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
1520 | ||
1521 | return ret; | |
1522 | } | |
1523 | ||
1524 | /** | |
1525 | * ab8500_charger_usb_en() - enable usb charging | |
1526 | * @di: pointer to the ab8500_charger structure | |
1527 | * @enable: enable/disable flag | |
1528 | * @vset: charging voltage | |
1529 | * @ich_out: charger output current | |
1530 | * | |
1531 | * Enable/Disable USB charging and turns on/off the charging led respectively. | |
1532 | * Returns error code in case of failure else 0(on success) | |
1533 | */ | |
1534 | static int ab8500_charger_usb_en(struct ux500_charger *charger, | |
1535 | int enable, int vset, int ich_out) | |
1536 | { | |
1537 | int ret; | |
1538 | int volt_index; | |
1539 | int curr_index; | |
1540 | u8 overshoot = 0; | |
1541 | ||
1542 | struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger); | |
1543 | ||
1544 | if (enable) { | |
1545 | /* Check if USB is connected */ | |
1546 | if (!di->usb.charger_connected) { | |
1547 | dev_err(di->dev, "USB charger not connected\n"); | |
1548 | return -ENXIO; | |
1549 | } | |
1550 | ||
1551 | /* | |
1552 | * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts | |
1553 | * will be triggered everytime we enable the VDD ADC supply. | |
1554 | * This will turn off charging for a short while. | |
1555 | * It can be avoided by having the supply on when | |
1556 | * there is a charger enabled. Normally the VDD ADC supply | |
1557 | * is enabled everytime a GPADC conversion is triggered. We will | |
1558 | * force it to be enabled from this driver to have | |
1559 | * the GPADC module independant of the AB8500 chargers | |
1560 | */ | |
1561 | if (!di->vddadc_en_usb) { | |
6de7ef3e SK |
1562 | ret = regulator_enable(di->regu); |
1563 | if (ret) | |
1564 | dev_warn(di->dev, | |
1565 | "Failed to enable regulator\n"); | |
1566 | else | |
1567 | di->vddadc_en_usb = true; | |
84edbeea AM |
1568 | } |
1569 | ||
1570 | /* Enable USB charging */ | |
1571 | dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out); | |
1572 | ||
1573 | /* Check if the requested voltage or current is valid */ | |
1574 | volt_index = ab8500_voltage_to_regval(vset); | |
861a30da | 1575 | curr_index = ab8500_current_to_regval(di, ich_out); |
84edbeea AM |
1576 | if (volt_index < 0 || curr_index < 0) { |
1577 | dev_err(di->dev, | |
1578 | "Charger voltage or current too high, " | |
1579 | "charging not started\n"); | |
1580 | return -ENXIO; | |
1581 | } | |
1582 | ||
1583 | /* ChVoltLevel: max voltage upto which battery can be charged */ | |
1584 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1585 | AB8500_CH_VOLT_LVL_REG, (u8) volt_index); | |
1586 | if (ret) { | |
1587 | dev_err(di->dev, "%s write failed\n", __func__); | |
1588 | return ret; | |
1589 | } | |
84edbeea | 1590 | /* Check if VBAT overshoot control should be enabled */ |
b0284de0 | 1591 | if (!di->bm->enable_overshoot) |
84edbeea AM |
1592 | overshoot = USB_CHG_NO_OVERSHOOT_ENA_N; |
1593 | ||
1594 | /* Enable USB Charger */ | |
34c11a70 POH |
1595 | dev_dbg(di->dev, |
1596 | "Enabling USB with write to AB8500_USBCH_CTRL1_REG\n"); | |
84edbeea AM |
1597 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
1598 | AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot); | |
1599 | if (ret) { | |
1600 | dev_err(di->dev, "%s write failed\n", __func__); | |
1601 | return ret; | |
1602 | } | |
1603 | ||
1604 | /* If success power on charging LED indication */ | |
1605 | ret = ab8500_charger_led_en(di, true); | |
1606 | if (ret < 0) | |
1607 | dev_err(di->dev, "failed to enable LED\n"); | |
1608 | ||
34c11a70 POH |
1609 | di->usb.charger_online = 1; |
1610 | ||
1611 | /* USBChInputCurr: current that can be drawn from the usb */ | |
f7470b5d LJ |
1612 | ret = ab8500_charger_set_vbus_in_curr(di, |
1613 | di->max_usb_in_curr.usb_type_max); | |
34c11a70 POH |
1614 | if (ret) { |
1615 | dev_err(di->dev, "setting USBChInputCurr failed\n"); | |
1616 | return ret; | |
1617 | } | |
1618 | ||
1619 | /* ChOutputCurentLevel: protected output current */ | |
1620 | ret = ab8500_charger_set_output_curr(di, ich_out); | |
1621 | if (ret) { | |
1622 | dev_err(di->dev, "%s " | |
1623 | "Failed to set ChOutputCurentLevel\n", | |
1624 | __func__); | |
1625 | return ret; | |
1626 | } | |
1627 | ||
84edbeea AM |
1628 | queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ); |
1629 | ||
84edbeea AM |
1630 | } else { |
1631 | /* Disable USB charging */ | |
34c11a70 | 1632 | dev_dbg(di->dev, "%s Disabled USB charging\n", __func__); |
84edbeea AM |
1633 | ret = abx500_set_register_interruptible(di->dev, |
1634 | AB8500_CHARGER, | |
1635 | AB8500_USBCH_CTRL1_REG, 0); | |
1636 | if (ret) { | |
1637 | dev_err(di->dev, | |
1638 | "%s write failed\n", __func__); | |
1639 | return ret; | |
1640 | } | |
1641 | ||
1642 | ret = ab8500_charger_led_en(di, false); | |
1643 | if (ret < 0) | |
1644 | dev_err(di->dev, "failed to disable LED\n"); | |
34c11a70 POH |
1645 | /* USBChInputCurr: current that can be drawn from the usb */ |
1646 | ret = ab8500_charger_set_vbus_in_curr(di, 0); | |
1647 | if (ret) { | |
1648 | dev_err(di->dev, "setting USBChInputCurr failed\n"); | |
1649 | return ret; | |
1650 | } | |
84edbeea | 1651 | |
34c11a70 POH |
1652 | /* ChOutputCurentLevel: protected output current */ |
1653 | ret = ab8500_charger_set_output_curr(di, 0); | |
1654 | if (ret) { | |
1655 | dev_err(di->dev, "%s " | |
1656 | "Failed to reset ChOutputCurentLevel\n", | |
1657 | __func__); | |
1658 | return ret; | |
1659 | } | |
84edbeea AM |
1660 | di->usb.charger_online = 0; |
1661 | di->usb.wd_expired = false; | |
1662 | ||
1663 | /* Disable regulator if enabled */ | |
1664 | if (di->vddadc_en_usb) { | |
1665 | regulator_disable(di->regu); | |
1666 | di->vddadc_en_usb = false; | |
1667 | } | |
1668 | ||
1669 | dev_dbg(di->dev, "%s Disabled USB charging\n", __func__); | |
1670 | ||
1671 | /* Cancel any pending Vbat check work */ | |
b09f86db | 1672 | cancel_delayed_work(&di->check_vbat_work); |
84edbeea AM |
1673 | |
1674 | } | |
1675 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
1676 | ||
1677 | return ret; | |
1678 | } | |
1679 | ||
8891716e LJ |
1680 | static int ab8500_external_charger_prepare(struct notifier_block *charger_nb, |
1681 | unsigned long event, void *data) | |
1682 | { | |
1683 | int ret; | |
1684 | struct device *dev = data; | |
1685 | /*Toggle External charger control pin*/ | |
1686 | ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK, | |
1687 | AB8500_SYS_CHARGER_CONTROL_REG, | |
1688 | EXTERNAL_CHARGER_DISABLE_REG_VAL); | |
1689 | if (ret < 0) { | |
1690 | dev_err(dev, "write reg failed %d\n", ret); | |
1691 | goto out; | |
1692 | } | |
1693 | ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK, | |
1694 | AB8500_SYS_CHARGER_CONTROL_REG, | |
1695 | EXTERNAL_CHARGER_ENABLE_REG_VAL); | |
1696 | if (ret < 0) | |
1697 | dev_err(dev, "Write reg failed %d\n", ret); | |
1698 | ||
1699 | out: | |
1700 | return ret; | |
1701 | } | |
1702 | ||
4dcdf577 LJ |
1703 | /** |
1704 | * ab8500_charger_usb_check_enable() - enable usb charging | |
1705 | * @charger: pointer to the ux500_charger structure | |
1706 | * @vset: charging voltage | |
1707 | * @iset: charger output current | |
1708 | * | |
1709 | * Check if the VBUS charger has been disconnected and reconnected without | |
1710 | * AB8500 rising an interrupt. Returns 0 on success. | |
1711 | */ | |
1712 | static int ab8500_charger_usb_check_enable(struct ux500_charger *charger, | |
1713 | int vset, int iset) | |
1714 | { | |
1715 | u8 usbch_ctrl1 = 0; | |
1716 | int ret = 0; | |
1717 | ||
1718 | struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger); | |
1719 | ||
1720 | if (!di->usb.charger_connected) | |
1721 | return ret; | |
1722 | ||
1723 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
1724 | AB8500_USBCH_CTRL1_REG, &usbch_ctrl1); | |
1725 | if (ret < 0) { | |
1726 | dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); | |
1727 | return ret; | |
1728 | } | |
1729 | dev_dbg(di->dev, "USB charger ctrl: 0x%02x\n", usbch_ctrl1); | |
1730 | ||
1731 | if (!(usbch_ctrl1 & USB_CH_ENA)) { | |
1732 | dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n"); | |
1733 | ||
1734 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1735 | AB8500_CHARGER, AB8500_CHARGER_CTRL, | |
1736 | DROP_COUNT_RESET, DROP_COUNT_RESET); | |
1737 | if (ret < 0) { | |
1738 | dev_err(di->dev, "ab8500 write failed %d\n", __LINE__); | |
1739 | return ret; | |
1740 | } | |
1741 | ||
1742 | ret = ab8500_charger_usb_en(&di->usb_chg, true, vset, iset); | |
1743 | if (ret < 0) { | |
1744 | dev_err(di->dev, "Failed to enable VBUS charger %d\n", | |
1745 | __LINE__); | |
1746 | return ret; | |
1747 | } | |
1748 | } | |
1749 | return ret; | |
1750 | } | |
1751 | ||
1752 | /** | |
1753 | * ab8500_charger_ac_check_enable() - enable usb charging | |
1754 | * @charger: pointer to the ux500_charger structure | |
1755 | * @vset: charging voltage | |
1756 | * @iset: charger output current | |
1757 | * | |
1758 | * Check if the AC charger has been disconnected and reconnected without | |
1759 | * AB8500 rising an interrupt. Returns 0 on success. | |
1760 | */ | |
1761 | static int ab8500_charger_ac_check_enable(struct ux500_charger *charger, | |
1762 | int vset, int iset) | |
1763 | { | |
1764 | u8 mainch_ctrl1 = 0; | |
1765 | int ret = 0; | |
1766 | ||
1767 | struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger); | |
1768 | ||
1769 | if (!di->ac.charger_connected) | |
1770 | return ret; | |
1771 | ||
1772 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
1773 | AB8500_MCH_CTRL1, &mainch_ctrl1); | |
1774 | if (ret < 0) { | |
1775 | dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); | |
1776 | return ret; | |
1777 | } | |
1778 | dev_dbg(di->dev, "AC charger ctrl: 0x%02x\n", mainch_ctrl1); | |
1779 | ||
1780 | if (!(mainch_ctrl1 & MAIN_CH_ENA)) { | |
1781 | dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n"); | |
1782 | ||
1783 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1784 | AB8500_CHARGER, AB8500_CHARGER_CTRL, | |
1785 | DROP_COUNT_RESET, DROP_COUNT_RESET); | |
1786 | ||
1787 | if (ret < 0) { | |
1788 | dev_err(di->dev, "ab8500 write failed %d\n", __LINE__); | |
1789 | return ret; | |
1790 | } | |
1791 | ||
1792 | ret = ab8500_charger_ac_en(&di->usb_chg, true, vset, iset); | |
1793 | if (ret < 0) { | |
1794 | dev_err(di->dev, "failed to enable AC charger %d\n", | |
1795 | __LINE__); | |
1796 | return ret; | |
1797 | } | |
1798 | } | |
1799 | return ret; | |
1800 | } | |
1801 | ||
84edbeea AM |
1802 | /** |
1803 | * ab8500_charger_watchdog_kick() - kick charger watchdog | |
1804 | * @di: pointer to the ab8500_charger structure | |
1805 | * | |
1806 | * Kick charger watchdog | |
1807 | * Returns error code in case of failure else 0(on success) | |
1808 | */ | |
1809 | static int ab8500_charger_watchdog_kick(struct ux500_charger *charger) | |
1810 | { | |
1811 | int ret; | |
1812 | struct ab8500_charger *di; | |
1813 | ||
1814 | if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS) | |
1815 | di = to_ab8500_charger_ac_device_info(charger); | |
1816 | else if (charger->psy.type == POWER_SUPPLY_TYPE_USB) | |
1817 | di = to_ab8500_charger_usb_device_info(charger); | |
1818 | else | |
1819 | return -ENXIO; | |
1820 | ||
1821 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1822 | AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); | |
1823 | if (ret) | |
1824 | dev_err(di->dev, "Failed to kick WD!\n"); | |
1825 | ||
1826 | return ret; | |
1827 | } | |
1828 | ||
1829 | /** | |
1830 | * ab8500_charger_update_charger_current() - update charger current | |
1831 | * @di: pointer to the ab8500_charger structure | |
1832 | * | |
1833 | * Update the charger output current for the specified charger | |
1834 | * Returns error code in case of failure else 0(on success) | |
1835 | */ | |
1836 | static int ab8500_charger_update_charger_current(struct ux500_charger *charger, | |
1837 | int ich_out) | |
1838 | { | |
1839 | int ret; | |
84edbeea AM |
1840 | struct ab8500_charger *di; |
1841 | ||
1842 | if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS) | |
1843 | di = to_ab8500_charger_ac_device_info(charger); | |
1844 | else if (charger->psy.type == POWER_SUPPLY_TYPE_USB) | |
1845 | di = to_ab8500_charger_usb_device_info(charger); | |
1846 | else | |
1847 | return -ENXIO; | |
1848 | ||
f8e96dff | 1849 | ret = ab8500_charger_set_output_curr(di, ich_out); |
84edbeea | 1850 | if (ret) { |
f8e96dff JB |
1851 | dev_err(di->dev, "%s " |
1852 | "Failed to set ChOutputCurentLevel\n", | |
1853 | __func__); | |
84edbeea AM |
1854 | return ret; |
1855 | } | |
1856 | ||
1857 | /* Reset the main and usb drop input current measurement counter */ | |
1858 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
4dcdf577 | 1859 | AB8500_CHARGER_CTRL, DROP_COUNT_RESET); |
84edbeea AM |
1860 | if (ret) { |
1861 | dev_err(di->dev, "%s write failed\n", __func__); | |
1862 | return ret; | |
1863 | } | |
1864 | ||
1865 | return ret; | |
1866 | } | |
1867 | ||
db43e6c4 LJ |
1868 | /** |
1869 | * ab8540_charger_power_path_enable() - enable usb power path mode | |
1870 | * @charger: pointer to the ux500_charger structure | |
1871 | * @enable: enable/disable flag | |
1872 | * | |
1873 | * Enable or disable the power path for usb mode | |
1874 | * Returns error code in case of failure else 0(on success) | |
1875 | */ | |
1876 | static int ab8540_charger_power_path_enable(struct ux500_charger *charger, | |
1877 | bool enable) | |
1878 | { | |
1879 | int ret; | |
1880 | struct ab8500_charger *di; | |
1881 | ||
1882 | if (charger->psy.type == POWER_SUPPLY_TYPE_USB) | |
1883 | di = to_ab8500_charger_usb_device_info(charger); | |
1884 | else | |
1885 | return -ENXIO; | |
1886 | ||
1887 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1888 | AB8500_CHARGER, AB8540_USB_PP_MODE_REG, | |
1889 | BUS_POWER_PATH_MODE_ENA, enable); | |
1890 | if (ret) { | |
1891 | dev_err(di->dev, "%s write failed\n", __func__); | |
1892 | return ret; | |
1893 | } | |
1894 | ||
1895 | return ret; | |
1896 | } | |
1897 | ||
1898 | ||
1899 | /** | |
1900 | * ab8540_charger_usb_pre_chg_enable() - enable usb pre change | |
1901 | * @charger: pointer to the ux500_charger structure | |
1902 | * @enable: enable/disable flag | |
1903 | * | |
1904 | * Enable or disable the pre-chage for usb mode | |
1905 | * Returns error code in case of failure else 0(on success) | |
1906 | */ | |
1907 | static int ab8540_charger_usb_pre_chg_enable(struct ux500_charger *charger, | |
1908 | bool enable) | |
1909 | { | |
1910 | int ret; | |
1911 | struct ab8500_charger *di; | |
1912 | ||
1913 | if (charger->psy.type == POWER_SUPPLY_TYPE_USB) | |
1914 | di = to_ab8500_charger_usb_device_info(charger); | |
1915 | else | |
1916 | return -ENXIO; | |
1917 | ||
1918 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1919 | AB8500_CHARGER, AB8540_USB_PP_CHR_REG, | |
1920 | BUS_POWER_PATH_PRECHG_ENA, enable); | |
1921 | if (ret) { | |
1922 | dev_err(di->dev, "%s write failed\n", __func__); | |
1923 | return ret; | |
1924 | } | |
1925 | ||
1926 | return ret; | |
1927 | } | |
1928 | ||
84edbeea AM |
1929 | static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data) |
1930 | { | |
1931 | struct power_supply *psy; | |
1932 | struct power_supply *ext; | |
1933 | struct ab8500_charger *di; | |
1934 | union power_supply_propval ret; | |
1935 | int i, j; | |
1936 | bool psy_found = false; | |
1937 | struct ux500_charger *usb_chg; | |
1938 | ||
1939 | usb_chg = (struct ux500_charger *)data; | |
1940 | psy = &usb_chg->psy; | |
1941 | ||
1942 | di = to_ab8500_charger_usb_device_info(usb_chg); | |
1943 | ||
1944 | ext = dev_get_drvdata(dev); | |
1945 | ||
1946 | /* For all psy where the driver name appears in any supplied_to */ | |
1947 | for (i = 0; i < ext->num_supplicants; i++) { | |
1948 | if (!strcmp(ext->supplied_to[i], psy->name)) | |
1949 | psy_found = true; | |
1950 | } | |
1951 | ||
1952 | if (!psy_found) | |
1953 | return 0; | |
1954 | ||
1955 | /* Go through all properties for the psy */ | |
1956 | for (j = 0; j < ext->num_properties; j++) { | |
1957 | enum power_supply_property prop; | |
1958 | prop = ext->properties[j]; | |
1959 | ||
1960 | if (ext->get_property(ext, prop, &ret)) | |
1961 | continue; | |
1962 | ||
1963 | switch (prop) { | |
1964 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
1965 | switch (ext->type) { | |
1966 | case POWER_SUPPLY_TYPE_BATTERY: | |
1967 | di->vbat = ret.intval / 1000; | |
1968 | break; | |
1969 | default: | |
1970 | break; | |
1971 | } | |
1972 | break; | |
1973 | default: | |
1974 | break; | |
1975 | } | |
1976 | } | |
1977 | return 0; | |
1978 | } | |
1979 | ||
1980 | /** | |
1981 | * ab8500_charger_check_vbat_work() - keep vbus current within spec | |
1982 | * @work pointer to the work_struct structure | |
1983 | * | |
1984 | * Due to a asic bug it is necessary to lower the input current to the vbus | |
1985 | * charger when charging with at some specific levels. This issue is only valid | |
1986 | * for below a certain battery voltage. This function makes sure that the | |
1987 | * the allowed current limit isn't exceeded. | |
1988 | */ | |
1989 | static void ab8500_charger_check_vbat_work(struct work_struct *work) | |
1990 | { | |
1991 | int t = 10; | |
1992 | struct ab8500_charger *di = container_of(work, | |
1993 | struct ab8500_charger, check_vbat_work.work); | |
1994 | ||
1995 | class_for_each_device(power_supply_class, NULL, | |
1996 | &di->usb_chg.psy, ab8500_charger_get_ext_psy_data); | |
1997 | ||
1998 | /* First run old_vbat is 0. */ | |
1999 | if (di->old_vbat == 0) | |
2000 | di->old_vbat = di->vbat; | |
2001 | ||
2002 | if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED && | |
2003 | di->vbat <= VBAT_TRESH_IP_CUR_RED) || | |
2004 | (di->old_vbat > VBAT_TRESH_IP_CUR_RED && | |
2005 | di->vbat > VBAT_TRESH_IP_CUR_RED))) { | |
2006 | ||
2007 | dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d," | |
f7470b5d LJ |
2008 | " old: %d\n", di->max_usb_in_curr.usb_type_max, |
2009 | di->vbat, di->old_vbat); | |
2010 | ab8500_charger_set_vbus_in_curr(di, | |
2011 | di->max_usb_in_curr.usb_type_max); | |
84edbeea AM |
2012 | power_supply_changed(&di->usb_chg.psy); |
2013 | } | |
2014 | ||
2015 | di->old_vbat = di->vbat; | |
2016 | ||
2017 | /* | |
2018 | * No need to check the battery voltage every second when not close to | |
2019 | * the threshold. | |
2020 | */ | |
2021 | if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) && | |
2022 | (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100))) | |
2023 | t = 1; | |
2024 | ||
2025 | queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ); | |
2026 | } | |
2027 | ||
2028 | /** | |
2029 | * ab8500_charger_check_hw_failure_work() - check main charger failure | |
2030 | * @work: pointer to the work_struct structure | |
2031 | * | |
2032 | * Work queue function for checking the main charger status | |
2033 | */ | |
2034 | static void ab8500_charger_check_hw_failure_work(struct work_struct *work) | |
2035 | { | |
2036 | int ret; | |
2037 | u8 reg_value; | |
2038 | ||
2039 | struct ab8500_charger *di = container_of(work, | |
2040 | struct ab8500_charger, check_hw_failure_work.work); | |
2041 | ||
2042 | /* Check if the status bits for HW failure is still active */ | |
2043 | if (di->flags.mainextchnotok) { | |
2044 | ret = abx500_get_register_interruptible(di->dev, | |
2045 | AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value); | |
2046 | if (ret < 0) { | |
2047 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
2048 | return; | |
2049 | } | |
2050 | if (!(reg_value & MAIN_CH_NOK)) { | |
2051 | di->flags.mainextchnotok = false; | |
2052 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
2053 | } | |
2054 | } | |
2055 | if (di->flags.vbus_ovv) { | |
2056 | ret = abx500_get_register_interruptible(di->dev, | |
2057 | AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, | |
2058 | ®_value); | |
2059 | if (ret < 0) { | |
2060 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
2061 | return; | |
2062 | } | |
2063 | if (!(reg_value & VBUS_OVV_TH)) { | |
2064 | di->flags.vbus_ovv = false; | |
2065 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2066 | } | |
2067 | } | |
2068 | /* If we still have a failure, schedule a new check */ | |
2069 | if (di->flags.mainextchnotok || di->flags.vbus_ovv) { | |
2070 | queue_delayed_work(di->charger_wq, | |
2071 | &di->check_hw_failure_work, round_jiffies(HZ)); | |
2072 | } | |
2073 | } | |
2074 | ||
2075 | /** | |
2076 | * ab8500_charger_kick_watchdog_work() - kick the watchdog | |
2077 | * @work: pointer to the work_struct structure | |
2078 | * | |
2079 | * Work queue function for kicking the charger watchdog. | |
2080 | * | |
2081 | * For ABB revision 1.0 and 1.1 there is a bug in the watchdog | |
2082 | * logic. That means we have to continously kick the charger | |
2083 | * watchdog even when no charger is connected. This is only | |
2084 | * valid once the AC charger has been enabled. This is | |
2085 | * a bug that is not handled by the algorithm and the | |
2086 | * watchdog have to be kicked by the charger driver | |
2087 | * when the AC charger is disabled | |
2088 | */ | |
2089 | static void ab8500_charger_kick_watchdog_work(struct work_struct *work) | |
2090 | { | |
2091 | int ret; | |
2092 | ||
2093 | struct ab8500_charger *di = container_of(work, | |
2094 | struct ab8500_charger, kick_wd_work.work); | |
2095 | ||
2096 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
2097 | AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); | |
2098 | if (ret) | |
2099 | dev_err(di->dev, "Failed to kick WD!\n"); | |
2100 | ||
2101 | /* Schedule a new watchdog kick */ | |
2102 | queue_delayed_work(di->charger_wq, | |
2103 | &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL)); | |
2104 | } | |
2105 | ||
2106 | /** | |
2107 | * ab8500_charger_ac_work() - work to get and set main charger status | |
2108 | * @work: pointer to the work_struct structure | |
2109 | * | |
2110 | * Work queue function for checking the main charger status | |
2111 | */ | |
2112 | static void ab8500_charger_ac_work(struct work_struct *work) | |
2113 | { | |
2114 | int ret; | |
2115 | ||
2116 | struct ab8500_charger *di = container_of(work, | |
2117 | struct ab8500_charger, ac_work); | |
2118 | ||
2119 | /* | |
2120 | * Since we can't be sure that the events are received | |
2121 | * synchronously, we have the check if the main charger is | |
2122 | * connected by reading the status register | |
2123 | */ | |
34c11a70 | 2124 | ret = ab8500_charger_detect_chargers(di, false); |
84edbeea AM |
2125 | if (ret < 0) |
2126 | return; | |
2127 | ||
2128 | if (ret & AC_PW_CONN) { | |
2129 | di->ac.charger_connected = 1; | |
2130 | di->ac_conn = true; | |
2131 | } else { | |
2132 | di->ac.charger_connected = 0; | |
2133 | } | |
2134 | ||
2135 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
2136 | sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present"); | |
2137 | } | |
2138 | ||
b269fff4 LJ |
2139 | static void ab8500_charger_usb_attached_work(struct work_struct *work) |
2140 | { | |
2141 | struct ab8500_charger *di = container_of(work, | |
2142 | struct ab8500_charger, | |
2143 | usb_charger_attached_work.work); | |
2144 | int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC); | |
2145 | int ret, i; | |
2146 | u8 statval; | |
2147 | ||
2148 | for (i = 0; i < 10; i++) { | |
2149 | ret = abx500_get_register_interruptible(di->dev, | |
2150 | AB8500_CHARGER, | |
2151 | AB8500_CH_USBCH_STAT1_REG, | |
2152 | &statval); | |
2153 | if (ret < 0) { | |
2154 | dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); | |
2155 | goto reschedule; | |
2156 | } | |
2157 | if ((statval & usbch) != usbch) | |
2158 | goto reschedule; | |
2159 | ||
2160 | msleep(CHARGER_STATUS_POLL); | |
2161 | } | |
2162 | ||
2163 | ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0); | |
2164 | ||
2165 | mutex_lock(&di->charger_attached_mutex); | |
2166 | mutex_unlock(&di->charger_attached_mutex); | |
2167 | ||
2168 | return; | |
2169 | ||
2170 | reschedule: | |
2171 | queue_delayed_work(di->charger_wq, | |
2172 | &di->usb_charger_attached_work, | |
2173 | HZ); | |
2174 | } | |
2175 | ||
2176 | static void ab8500_charger_ac_attached_work(struct work_struct *work) | |
2177 | { | |
2178 | ||
2179 | struct ab8500_charger *di = container_of(work, | |
2180 | struct ab8500_charger, | |
2181 | ac_charger_attached_work.work); | |
2182 | int mainch = (MAIN_CH_STATUS2_MAINCHGDROP | | |
2183 | MAIN_CH_STATUS2_MAINCHARGERDETDBNC); | |
2184 | int ret, i; | |
2185 | u8 statval; | |
2186 | ||
2187 | for (i = 0; i < 10; i++) { | |
2188 | ret = abx500_get_register_interruptible(di->dev, | |
2189 | AB8500_CHARGER, | |
2190 | AB8500_CH_STATUS2_REG, | |
2191 | &statval); | |
2192 | if (ret < 0) { | |
2193 | dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); | |
2194 | goto reschedule; | |
2195 | } | |
2196 | ||
2197 | if ((statval & mainch) != mainch) | |
2198 | goto reschedule; | |
2199 | ||
2200 | msleep(CHARGER_STATUS_POLL); | |
2201 | } | |
2202 | ||
2203 | ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0); | |
2204 | queue_work(di->charger_wq, &di->ac_work); | |
2205 | ||
2206 | mutex_lock(&di->charger_attached_mutex); | |
2207 | mutex_unlock(&di->charger_attached_mutex); | |
2208 | ||
2209 | return; | |
2210 | ||
2211 | reschedule: | |
2212 | queue_delayed_work(di->charger_wq, | |
2213 | &di->ac_charger_attached_work, | |
2214 | HZ); | |
2215 | } | |
2216 | ||
84edbeea AM |
2217 | /** |
2218 | * ab8500_charger_detect_usb_type_work() - work to detect USB type | |
2219 | * @work: Pointer to the work_struct structure | |
2220 | * | |
2221 | * Detect the type of USB plugged | |
2222 | */ | |
64eb9b02 | 2223 | static void ab8500_charger_detect_usb_type_work(struct work_struct *work) |
84edbeea AM |
2224 | { |
2225 | int ret; | |
2226 | ||
2227 | struct ab8500_charger *di = container_of(work, | |
2228 | struct ab8500_charger, detect_usb_type_work); | |
2229 | ||
2230 | /* | |
2231 | * Since we can't be sure that the events are received | |
2232 | * synchronously, we have the check if is | |
2233 | * connected by reading the status register | |
2234 | */ | |
34c11a70 | 2235 | ret = ab8500_charger_detect_chargers(di, false); |
84edbeea AM |
2236 | if (ret < 0) |
2237 | return; | |
2238 | ||
2239 | if (!(ret & USB_PW_CONN)) { | |
34c11a70 POH |
2240 | dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__); |
2241 | di->vbus_detected = false; | |
84edbeea AM |
2242 | ab8500_charger_set_usb_connected(di, false); |
2243 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2244 | } else { | |
34c11a70 POH |
2245 | dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__); |
2246 | di->vbus_detected = true; | |
84edbeea AM |
2247 | |
2248 | if (is_ab8500_1p1_or_earlier(di->parent)) { | |
2249 | ret = ab8500_charger_detect_usb_type(di); | |
2250 | if (!ret) { | |
2251 | ab8500_charger_set_usb_connected(di, true); | |
2252 | ab8500_power_supply_changed(di, | |
2253 | &di->usb_chg.psy); | |
2254 | } | |
2255 | } else { | |
34c11a70 POH |
2256 | /* |
2257 | * For ABB cut2.0 and onwards we have an IRQ, | |
84edbeea AM |
2258 | * USB_LINK_STATUS that will be triggered when the USB |
2259 | * link status changes. The exception is USB connected | |
2260 | * during startup. Then we don't get a | |
2261 | * USB_LINK_STATUS IRQ | |
2262 | */ | |
2263 | if (di->vbus_detected_start) { | |
2264 | di->vbus_detected_start = false; | |
2265 | ret = ab8500_charger_detect_usb_type(di); | |
2266 | if (!ret) { | |
2267 | ab8500_charger_set_usb_connected(di, | |
2268 | true); | |
2269 | ab8500_power_supply_changed(di, | |
2270 | &di->usb_chg.psy); | |
2271 | } | |
2272 | } | |
2273 | } | |
2274 | } | |
2275 | } | |
2276 | ||
4b45f4a9 | 2277 | /** |
34c11a70 | 2278 | * ab8500_charger_usb_link_attach_work() - work to detect USB type |
4b45f4a9 MC |
2279 | * @work: pointer to the work_struct structure |
2280 | * | |
2281 | * Detect the type of USB plugged | |
2282 | */ | |
2283 | static void ab8500_charger_usb_link_attach_work(struct work_struct *work) | |
2284 | { | |
2285 | struct ab8500_charger *di = | |
2286 | container_of(work, struct ab8500_charger, attach_work.work); | |
2287 | int ret; | |
2288 | ||
2289 | /* Update maximum input current if USB enumeration is not detected */ | |
2290 | if (!di->usb.charger_online) { | |
f7470b5d LJ |
2291 | ret = ab8500_charger_set_vbus_in_curr(di, |
2292 | di->max_usb_in_curr.usb_type_max); | |
4b45f4a9 MC |
2293 | if (ret) |
2294 | return; | |
2295 | } | |
2296 | ||
2297 | ab8500_charger_set_usb_connected(di, true); | |
2298 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2299 | } | |
2300 | ||
84edbeea AM |
2301 | /** |
2302 | * ab8500_charger_usb_link_status_work() - work to detect USB type | |
2303 | * @work: pointer to the work_struct structure | |
2304 | * | |
2305 | * Detect the type of USB plugged | |
2306 | */ | |
2307 | static void ab8500_charger_usb_link_status_work(struct work_struct *work) | |
2308 | { | |
ff38090a | 2309 | int detected_chargers; |
84edbeea | 2310 | int ret; |
ff38090a | 2311 | u8 val; |
d4337660 | 2312 | u8 link_status; |
84edbeea AM |
2313 | |
2314 | struct ab8500_charger *di = container_of(work, | |
2315 | struct ab8500_charger, usb_link_status_work); | |
2316 | ||
2317 | /* | |
2318 | * Since we can't be sure that the events are received | |
2319 | * synchronously, we have the check if is | |
2320 | * connected by reading the status register | |
2321 | */ | |
34c11a70 | 2322 | detected_chargers = ab8500_charger_detect_chargers(di, false); |
ff38090a | 2323 | if (detected_chargers < 0) |
84edbeea AM |
2324 | return; |
2325 | ||
ff38090a HS |
2326 | /* |
2327 | * Some chargers that breaks the USB spec is | |
2328 | * identified as invalid by AB8500 and it refuse | |
2329 | * to start the charging process. but by jumping | |
2330 | * thru a few hoops it can be forced to start. | |
2331 | */ | |
88efdb80 MC |
2332 | if (is_ab8500(di->parent)) |
2333 | ret = abx500_get_register_interruptible(di->dev, AB8500_USB, | |
2334 | AB8500_USB_LINE_STAT_REG, &val); | |
2335 | else | |
2336 | ret = abx500_get_register_interruptible(di->dev, AB8500_USB, | |
2337 | AB8500_USB_LINK1_STAT_REG, &val); | |
2338 | ||
ff38090a HS |
2339 | if (ret >= 0) |
2340 | dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val); | |
2341 | else | |
2342 | dev_dbg(di->dev, "Error reading USB link status\n"); | |
2343 | ||
861a30da | 2344 | if (is_ab8500(di->parent)) |
d4337660 | 2345 | link_status = AB8500_USB_LINK_STATUS; |
861a30da LJ |
2346 | else |
2347 | link_status = AB8505_USB_LINK_STATUS; | |
d4337660 | 2348 | |
ff38090a | 2349 | if (detected_chargers & USB_PW_CONN) { |
861a30da LJ |
2350 | if (((val & link_status) >> USB_LINK_STATUS_SHIFT) == |
2351 | USB_STAT_NOT_VALID_LINK && | |
ff38090a | 2352 | di->invalid_charger_detect_state == 0) { |
861a30da LJ |
2353 | dev_dbg(di->dev, |
2354 | "Invalid charger detected, state= 0\n"); | |
ff38090a HS |
2355 | /*Enable charger*/ |
2356 | abx500_mask_and_set_register_interruptible(di->dev, | |
861a30da LJ |
2357 | AB8500_CHARGER, AB8500_USBCH_CTRL1_REG, |
2358 | USB_CH_ENA, USB_CH_ENA); | |
ff38090a | 2359 | /*Enable charger detection*/ |
b3ea5f45 MC |
2360 | abx500_mask_and_set_register_interruptible(di->dev, |
2361 | AB8500_USB, AB8500_USB_LINE_CTRL2_REG, | |
2362 | USB_CH_DET, USB_CH_DET); | |
ff38090a HS |
2363 | di->invalid_charger_detect_state = 1; |
2364 | /*exit and wait for new link status interrupt.*/ | |
2365 | return; | |
2366 | ||
2367 | } | |
2368 | if (di->invalid_charger_detect_state == 1) { | |
861a30da LJ |
2369 | dev_dbg(di->dev, |
2370 | "Invalid charger detected, state= 1\n"); | |
ff38090a | 2371 | /*Stop charger detection*/ |
b3ea5f45 MC |
2372 | abx500_mask_and_set_register_interruptible(di->dev, |
2373 | AB8500_USB, AB8500_USB_LINE_CTRL2_REG, | |
2374 | USB_CH_DET, 0x00); | |
ff38090a | 2375 | /*Check link status*/ |
88efdb80 MC |
2376 | if (is_ab8500(di->parent)) |
2377 | ret = abx500_get_register_interruptible(di->dev, | |
2378 | AB8500_USB, AB8500_USB_LINE_STAT_REG, | |
2379 | &val); | |
2380 | else | |
2381 | ret = abx500_get_register_interruptible(di->dev, | |
2382 | AB8500_USB, AB8500_USB_LINK1_STAT_REG, | |
2383 | &val); | |
2384 | ||
ff38090a | 2385 | dev_dbg(di->dev, "USB link status= 0x%02x\n", |
861a30da | 2386 | (val & link_status) >> USB_LINK_STATUS_SHIFT); |
ff38090a HS |
2387 | di->invalid_charger_detect_state = 2; |
2388 | } | |
2389 | } else { | |
2390 | di->invalid_charger_detect_state = 0; | |
2391 | } | |
2392 | ||
2393 | if (!(detected_chargers & USB_PW_CONN)) { | |
34c11a70 | 2394 | di->vbus_detected = false; |
84edbeea AM |
2395 | ab8500_charger_set_usb_connected(di, false); |
2396 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
4b45f4a9 MC |
2397 | return; |
2398 | } | |
84edbeea | 2399 | |
34c11a70 POH |
2400 | dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__); |
2401 | di->vbus_detected = true; | |
4b45f4a9 | 2402 | ret = ab8500_charger_read_usb_type(di); |
34c11a70 POH |
2403 | if (ret) { |
2404 | if (ret == -ENXIO) { | |
2405 | /* No valid charger type detected */ | |
2406 | ab8500_charger_set_usb_connected(di, false); | |
2407 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
84edbeea | 2408 | } |
34c11a70 POH |
2409 | return; |
2410 | } | |
2411 | ||
2412 | if (di->usb_device_is_unrecognised) { | |
2413 | dev_dbg(di->dev, | |
2414 | "Potential Legacy Charger device. " | |
2415 | "Delay work for %d msec for USB enum " | |
2416 | "to finish", | |
2417 | WAIT_ACA_RID_ENUMERATION); | |
2418 | queue_delayed_work(di->charger_wq, | |
2419 | &di->attach_work, | |
2420 | msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION)); | |
2421 | } else if (di->is_aca_rid == 1) { | |
2422 | /* Only wait once */ | |
2423 | di->is_aca_rid++; | |
2424 | dev_dbg(di->dev, | |
2425 | "%s Wait %d msec for USB enum to finish", | |
2426 | __func__, WAIT_ACA_RID_ENUMERATION); | |
2427 | queue_delayed_work(di->charger_wq, | |
2428 | &di->attach_work, | |
2429 | msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION)); | |
2430 | } else { | |
2431 | queue_delayed_work(di->charger_wq, | |
2432 | &di->attach_work, | |
2433 | 0); | |
84edbeea AM |
2434 | } |
2435 | } | |
2436 | ||
2437 | static void ab8500_charger_usb_state_changed_work(struct work_struct *work) | |
2438 | { | |
2439 | int ret; | |
2440 | unsigned long flags; | |
2441 | ||
2442 | struct ab8500_charger *di = container_of(work, | |
34c11a70 | 2443 | struct ab8500_charger, usb_state_changed_work.work); |
84edbeea | 2444 | |
34c11a70 POH |
2445 | if (!di->vbus_detected) { |
2446 | dev_dbg(di->dev, | |
2447 | "%s !di->vbus_detected\n", | |
2448 | __func__); | |
84edbeea | 2449 | return; |
34c11a70 | 2450 | } |
84edbeea AM |
2451 | |
2452 | spin_lock_irqsave(&di->usb_state.usb_lock, flags); | |
34c11a70 POH |
2453 | di->usb_state.state = di->usb_state.state_tmp; |
2454 | di->usb_state.usb_current = di->usb_state.usb_current_tmp; | |
84edbeea AM |
2455 | spin_unlock_irqrestore(&di->usb_state.usb_lock, flags); |
2456 | ||
84edbeea AM |
2457 | dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n", |
2458 | __func__, di->usb_state.state, di->usb_state.usb_current); | |
2459 | ||
2460 | switch (di->usb_state.state) { | |
2461 | case AB8500_BM_USB_STATE_RESET_HS: | |
2462 | case AB8500_BM_USB_STATE_RESET_FS: | |
2463 | case AB8500_BM_USB_STATE_SUSPEND: | |
2464 | case AB8500_BM_USB_STATE_MAX: | |
2465 | ab8500_charger_set_usb_connected(di, false); | |
2466 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2467 | break; | |
2468 | ||
2469 | case AB8500_BM_USB_STATE_RESUME: | |
2470 | /* | |
2471 | * when suspend->resume there should be delay | |
2472 | * of 1sec for enabling charging | |
2473 | */ | |
2474 | msleep(1000); | |
2475 | /* Intentional fall through */ | |
2476 | case AB8500_BM_USB_STATE_CONFIGURED: | |
2477 | /* | |
2478 | * USB is configured, enable charging with the charging | |
2479 | * input current obtained from USB driver | |
2480 | */ | |
2481 | if (!ab8500_charger_get_usb_cur(di)) { | |
2482 | /* Update maximum input current */ | |
2483 | ret = ab8500_charger_set_vbus_in_curr(di, | |
f7470b5d | 2484 | di->max_usb_in_curr.usb_type_max); |
84edbeea AM |
2485 | if (ret) |
2486 | return; | |
2487 | ||
2488 | ab8500_charger_set_usb_connected(di, true); | |
2489 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2490 | } | |
2491 | break; | |
2492 | ||
2493 | default: | |
2494 | break; | |
2495 | }; | |
2496 | } | |
2497 | ||
2498 | /** | |
2499 | * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status | |
2500 | * @work: pointer to the work_struct structure | |
2501 | * | |
2502 | * Work queue function for checking the USB charger Not OK status | |
2503 | */ | |
2504 | static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work) | |
2505 | { | |
2506 | int ret; | |
2507 | u8 reg_value; | |
2508 | bool prev_status; | |
2509 | ||
2510 | struct ab8500_charger *di = container_of(work, | |
2511 | struct ab8500_charger, check_usbchgnotok_work.work); | |
2512 | ||
2513 | /* Check if the status bit for usbchargernotok is still active */ | |
2514 | ret = abx500_get_register_interruptible(di->dev, | |
2515 | AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value); | |
2516 | if (ret < 0) { | |
2517 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
2518 | return; | |
2519 | } | |
2520 | prev_status = di->flags.usbchargernotok; | |
2521 | ||
2522 | if (reg_value & VBUS_CH_NOK) { | |
2523 | di->flags.usbchargernotok = true; | |
2524 | /* Check again in 1sec */ | |
2525 | queue_delayed_work(di->charger_wq, | |
2526 | &di->check_usbchgnotok_work, HZ); | |
2527 | } else { | |
2528 | di->flags.usbchargernotok = false; | |
2529 | di->flags.vbus_collapse = false; | |
2530 | } | |
2531 | ||
2532 | if (prev_status != di->flags.usbchargernotok) | |
2533 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2534 | } | |
2535 | ||
2536 | /** | |
2537 | * ab8500_charger_check_main_thermal_prot_work() - check main thermal status | |
2538 | * @work: pointer to the work_struct structure | |
2539 | * | |
2540 | * Work queue function for checking the Main thermal prot status | |
2541 | */ | |
2542 | static void ab8500_charger_check_main_thermal_prot_work( | |
2543 | struct work_struct *work) | |
2544 | { | |
2545 | int ret; | |
2546 | u8 reg_value; | |
2547 | ||
2548 | struct ab8500_charger *di = container_of(work, | |
2549 | struct ab8500_charger, check_main_thermal_prot_work); | |
2550 | ||
2551 | /* Check if the status bit for main_thermal_prot is still active */ | |
2552 | ret = abx500_get_register_interruptible(di->dev, | |
2553 | AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value); | |
2554 | if (ret < 0) { | |
2555 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
2556 | return; | |
2557 | } | |
2558 | if (reg_value & MAIN_CH_TH_PROT) | |
2559 | di->flags.main_thermal_prot = true; | |
2560 | else | |
2561 | di->flags.main_thermal_prot = false; | |
2562 | ||
2563 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
2564 | } | |
2565 | ||
2566 | /** | |
2567 | * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status | |
2568 | * @work: pointer to the work_struct structure | |
2569 | * | |
2570 | * Work queue function for checking the USB thermal prot status | |
2571 | */ | |
2572 | static void ab8500_charger_check_usb_thermal_prot_work( | |
2573 | struct work_struct *work) | |
2574 | { | |
2575 | int ret; | |
2576 | u8 reg_value; | |
2577 | ||
2578 | struct ab8500_charger *di = container_of(work, | |
2579 | struct ab8500_charger, check_usb_thermal_prot_work); | |
2580 | ||
2581 | /* Check if the status bit for usb_thermal_prot is still active */ | |
2582 | ret = abx500_get_register_interruptible(di->dev, | |
2583 | AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value); | |
2584 | if (ret < 0) { | |
2585 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
2586 | return; | |
2587 | } | |
2588 | if (reg_value & USB_CH_TH_PROT) | |
2589 | di->flags.usb_thermal_prot = true; | |
2590 | else | |
2591 | di->flags.usb_thermal_prot = false; | |
2592 | ||
2593 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2594 | } | |
2595 | ||
2596 | /** | |
2597 | * ab8500_charger_mainchunplugdet_handler() - main charger unplugged | |
2598 | * @irq: interrupt number | |
2599 | * @_di: pointer to the ab8500_charger structure | |
2600 | * | |
2601 | * Returns IRQ status(IRQ_HANDLED) | |
2602 | */ | |
2603 | static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di) | |
2604 | { | |
2605 | struct ab8500_charger *di = _di; | |
2606 | ||
2607 | dev_dbg(di->dev, "Main charger unplugged\n"); | |
2608 | queue_work(di->charger_wq, &di->ac_work); | |
2609 | ||
b269fff4 LJ |
2610 | cancel_delayed_work_sync(&di->ac_charger_attached_work); |
2611 | mutex_lock(&di->charger_attached_mutex); | |
2612 | mutex_unlock(&di->charger_attached_mutex); | |
2613 | ||
84edbeea AM |
2614 | return IRQ_HANDLED; |
2615 | } | |
2616 | ||
2617 | /** | |
2618 | * ab8500_charger_mainchplugdet_handler() - main charger plugged | |
2619 | * @irq: interrupt number | |
2620 | * @_di: pointer to the ab8500_charger structure | |
2621 | * | |
2622 | * Returns IRQ status(IRQ_HANDLED) | |
2623 | */ | |
2624 | static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di) | |
2625 | { | |
2626 | struct ab8500_charger *di = _di; | |
2627 | ||
2628 | dev_dbg(di->dev, "Main charger plugged\n"); | |
2629 | queue_work(di->charger_wq, &di->ac_work); | |
2630 | ||
b269fff4 LJ |
2631 | mutex_lock(&di->charger_attached_mutex); |
2632 | mutex_unlock(&di->charger_attached_mutex); | |
261c5136 RV |
2633 | |
2634 | if (is_ab8500(di->parent)) | |
2635 | queue_delayed_work(di->charger_wq, | |
b269fff4 LJ |
2636 | &di->ac_charger_attached_work, |
2637 | HZ); | |
84edbeea AM |
2638 | return IRQ_HANDLED; |
2639 | } | |
2640 | ||
2641 | /** | |
2642 | * ab8500_charger_mainextchnotok_handler() - main charger not ok | |
2643 | * @irq: interrupt number | |
2644 | * @_di: pointer to the ab8500_charger structure | |
2645 | * | |
2646 | * Returns IRQ status(IRQ_HANDLED) | |
2647 | */ | |
2648 | static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di) | |
2649 | { | |
2650 | struct ab8500_charger *di = _di; | |
2651 | ||
2652 | dev_dbg(di->dev, "Main charger not ok\n"); | |
2653 | di->flags.mainextchnotok = true; | |
2654 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
2655 | ||
2656 | /* Schedule a new HW failure check */ | |
2657 | queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); | |
2658 | ||
2659 | return IRQ_HANDLED; | |
2660 | } | |
2661 | ||
2662 | /** | |
2663 | * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger | |
2664 | * thermal protection threshold | |
2665 | * @irq: interrupt number | |
2666 | * @_di: pointer to the ab8500_charger structure | |
2667 | * | |
2668 | * Returns IRQ status(IRQ_HANDLED) | |
2669 | */ | |
2670 | static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di) | |
2671 | { | |
2672 | struct ab8500_charger *di = _di; | |
2673 | ||
2674 | dev_dbg(di->dev, | |
2675 | "Die temp above Main charger thermal protection threshold\n"); | |
2676 | queue_work(di->charger_wq, &di->check_main_thermal_prot_work); | |
2677 | ||
2678 | return IRQ_HANDLED; | |
2679 | } | |
2680 | ||
2681 | /** | |
2682 | * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger | |
2683 | * thermal protection threshold | |
2684 | * @irq: interrupt number | |
2685 | * @_di: pointer to the ab8500_charger structure | |
2686 | * | |
2687 | * Returns IRQ status(IRQ_HANDLED) | |
2688 | */ | |
2689 | static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di) | |
2690 | { | |
2691 | struct ab8500_charger *di = _di; | |
2692 | ||
2693 | dev_dbg(di->dev, | |
2694 | "Die temp ok for Main charger thermal protection threshold\n"); | |
2695 | queue_work(di->charger_wq, &di->check_main_thermal_prot_work); | |
2696 | ||
2697 | return IRQ_HANDLED; | |
2698 | } | |
2699 | ||
34c11a70 POH |
2700 | static void ab8500_charger_vbus_drop_end_work(struct work_struct *work) |
2701 | { | |
2702 | struct ab8500_charger *di = container_of(work, | |
2703 | struct ab8500_charger, vbus_drop_end_work.work); | |
861a30da | 2704 | int ret, curr; |
f7470b5d | 2705 | u8 reg_value; |
34c11a70 POH |
2706 | |
2707 | di->flags.vbus_drop_end = false; | |
2708 | ||
2709 | /* Reset the drop counter */ | |
2710 | abx500_set_register_interruptible(di->dev, | |
2711 | AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01); | |
861a30da LJ |
2712 | |
2713 | if (is_ab8540(di->parent)) | |
2714 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
2715 | AB8540_CH_USBCH_STAT3_REG, ®_value); | |
2716 | else | |
2717 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
2718 | AB8500_CH_USBCH_STAT2_REG, ®_value); | |
f7470b5d | 2719 | if (ret < 0) { |
861a30da LJ |
2720 | dev_err(di->dev, "%s read failed\n", __func__); |
2721 | return; | |
2722 | } | |
2723 | ||
2724 | if (is_ab8540(di->parent)) | |
2725 | curr = di->bm->chg_input_curr[ | |
2726 | reg_value & AB8540_AUTO_VBUS_IN_CURR_MASK]; | |
2727 | else | |
2728 | curr = di->bm->chg_input_curr[ | |
f7470b5d | 2729 | reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT]; |
861a30da LJ |
2730 | |
2731 | if (di->max_usb_in_curr.calculated_max != curr) { | |
2732 | /* USB source is collapsing */ | |
2733 | di->max_usb_in_curr.calculated_max = curr; | |
2734 | dev_dbg(di->dev, | |
2735 | "VBUS input current limiting to %d mA\n", | |
2736 | di->max_usb_in_curr.calculated_max); | |
2737 | } else { | |
2738 | /* | |
2739 | * USB source can not give more than this amount. | |
2740 | * Taking more will collapse the source. | |
2741 | */ | |
2742 | di->max_usb_in_curr.set_max = | |
2743 | di->max_usb_in_curr.calculated_max; | |
2744 | dev_dbg(di->dev, | |
2745 | "VBUS input current limited to %d mA\n", | |
2746 | di->max_usb_in_curr.set_max); | |
f7470b5d | 2747 | } |
34c11a70 POH |
2748 | |
2749 | if (di->usb.charger_connected) | |
f7470b5d LJ |
2750 | ab8500_charger_set_vbus_in_curr(di, |
2751 | di->max_usb_in_curr.usb_type_max); | |
34c11a70 POH |
2752 | } |
2753 | ||
84edbeea AM |
2754 | /** |
2755 | * ab8500_charger_vbusdetf_handler() - VBUS falling detected | |
2756 | * @irq: interrupt number | |
2757 | * @_di: pointer to the ab8500_charger structure | |
2758 | * | |
2759 | * Returns IRQ status(IRQ_HANDLED) | |
2760 | */ | |
2761 | static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di) | |
2762 | { | |
2763 | struct ab8500_charger *di = _di; | |
2764 | ||
34c11a70 | 2765 | di->vbus_detected = false; |
84edbeea AM |
2766 | dev_dbg(di->dev, "VBUS falling detected\n"); |
2767 | queue_work(di->charger_wq, &di->detect_usb_type_work); | |
2768 | ||
2769 | return IRQ_HANDLED; | |
2770 | } | |
2771 | ||
2772 | /** | |
2773 | * ab8500_charger_vbusdetr_handler() - VBUS rising detected | |
2774 | * @irq: interrupt number | |
2775 | * @_di: pointer to the ab8500_charger structure | |
2776 | * | |
2777 | * Returns IRQ status(IRQ_HANDLED) | |
2778 | */ | |
2779 | static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di) | |
2780 | { | |
2781 | struct ab8500_charger *di = _di; | |
2782 | ||
2783 | di->vbus_detected = true; | |
2784 | dev_dbg(di->dev, "VBUS rising detected\n"); | |
34c11a70 | 2785 | |
84edbeea AM |
2786 | queue_work(di->charger_wq, &di->detect_usb_type_work); |
2787 | ||
2788 | return IRQ_HANDLED; | |
2789 | } | |
2790 | ||
2791 | /** | |
2792 | * ab8500_charger_usblinkstatus_handler() - USB link status has changed | |
2793 | * @irq: interrupt number | |
2794 | * @_di: pointer to the ab8500_charger structure | |
2795 | * | |
2796 | * Returns IRQ status(IRQ_HANDLED) | |
2797 | */ | |
2798 | static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di) | |
2799 | { | |
2800 | struct ab8500_charger *di = _di; | |
2801 | ||
2802 | dev_dbg(di->dev, "USB link status changed\n"); | |
2803 | ||
2804 | queue_work(di->charger_wq, &di->usb_link_status_work); | |
2805 | ||
2806 | return IRQ_HANDLED; | |
2807 | } | |
2808 | ||
2809 | /** | |
2810 | * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger | |
2811 | * thermal protection threshold | |
2812 | * @irq: interrupt number | |
2813 | * @_di: pointer to the ab8500_charger structure | |
2814 | * | |
2815 | * Returns IRQ status(IRQ_HANDLED) | |
2816 | */ | |
2817 | static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di) | |
2818 | { | |
2819 | struct ab8500_charger *di = _di; | |
2820 | ||
2821 | dev_dbg(di->dev, | |
2822 | "Die temp above USB charger thermal protection threshold\n"); | |
2823 | queue_work(di->charger_wq, &di->check_usb_thermal_prot_work); | |
2824 | ||
2825 | return IRQ_HANDLED; | |
2826 | } | |
2827 | ||
2828 | /** | |
2829 | * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger | |
2830 | * thermal protection threshold | |
2831 | * @irq: interrupt number | |
2832 | * @_di: pointer to the ab8500_charger structure | |
2833 | * | |
2834 | * Returns IRQ status(IRQ_HANDLED) | |
2835 | */ | |
2836 | static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di) | |
2837 | { | |
2838 | struct ab8500_charger *di = _di; | |
2839 | ||
2840 | dev_dbg(di->dev, | |
2841 | "Die temp ok for USB charger thermal protection threshold\n"); | |
2842 | queue_work(di->charger_wq, &di->check_usb_thermal_prot_work); | |
2843 | ||
2844 | return IRQ_HANDLED; | |
2845 | } | |
2846 | ||
2847 | /** | |
2848 | * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected | |
2849 | * @irq: interrupt number | |
2850 | * @_di: pointer to the ab8500_charger structure | |
2851 | * | |
2852 | * Returns IRQ status(IRQ_HANDLED) | |
2853 | */ | |
2854 | static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di) | |
2855 | { | |
2856 | struct ab8500_charger *di = _di; | |
2857 | ||
2858 | dev_dbg(di->dev, "Not allowed USB charger detected\n"); | |
2859 | queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0); | |
2860 | ||
2861 | return IRQ_HANDLED; | |
2862 | } | |
2863 | ||
2864 | /** | |
2865 | * ab8500_charger_chwdexp_handler() - Charger watchdog expired | |
2866 | * @irq: interrupt number | |
2867 | * @_di: pointer to the ab8500_charger structure | |
2868 | * | |
2869 | * Returns IRQ status(IRQ_HANDLED) | |
2870 | */ | |
2871 | static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di) | |
2872 | { | |
2873 | struct ab8500_charger *di = _di; | |
2874 | ||
2875 | dev_dbg(di->dev, "Charger watchdog expired\n"); | |
2876 | ||
2877 | /* | |
2878 | * The charger that was online when the watchdog expired | |
2879 | * needs to be restarted for charging to start again | |
2880 | */ | |
2881 | if (di->ac.charger_online) { | |
2882 | di->ac.wd_expired = true; | |
2883 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
2884 | } | |
2885 | if (di->usb.charger_online) { | |
2886 | di->usb.wd_expired = true; | |
2887 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2888 | } | |
2889 | ||
2890 | return IRQ_HANDLED; | |
2891 | } | |
2892 | ||
34c11a70 POH |
2893 | /** |
2894 | * ab8500_charger_vbuschdropend_handler() - VBUS drop removed | |
2895 | * @irq: interrupt number | |
2896 | * @_di: pointer to the ab8500_charger structure | |
2897 | * | |
2898 | * Returns IRQ status(IRQ_HANDLED) | |
2899 | */ | |
2900 | static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di) | |
2901 | { | |
2902 | struct ab8500_charger *di = _di; | |
2903 | ||
2904 | dev_dbg(di->dev, "VBUS charger drop ended\n"); | |
2905 | di->flags.vbus_drop_end = true; | |
f7470b5d LJ |
2906 | |
2907 | /* | |
2908 | * VBUS might have dropped due to bad connection. | |
2909 | * Schedule a new input limit set to the value SW requests. | |
2910 | */ | |
34c11a70 | 2911 | queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, |
f7470b5d | 2912 | round_jiffies(VBUS_IN_CURR_LIM_RETRY_SET_TIME * HZ)); |
34c11a70 POH |
2913 | |
2914 | return IRQ_HANDLED; | |
2915 | } | |
2916 | ||
84edbeea AM |
2917 | /** |
2918 | * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected | |
2919 | * @irq: interrupt number | |
2920 | * @_di: pointer to the ab8500_charger structure | |
2921 | * | |
2922 | * Returns IRQ status(IRQ_HANDLED) | |
2923 | */ | |
2924 | static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di) | |
2925 | { | |
2926 | struct ab8500_charger *di = _di; | |
2927 | ||
2928 | dev_dbg(di->dev, "VBUS overvoltage detected\n"); | |
2929 | di->flags.vbus_ovv = true; | |
2930 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2931 | ||
2932 | /* Schedule a new HW failure check */ | |
2933 | queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); | |
2934 | ||
2935 | return IRQ_HANDLED; | |
2936 | } | |
2937 | ||
2938 | /** | |
2939 | * ab8500_charger_ac_get_property() - get the ac/mains properties | |
2940 | * @psy: pointer to the power_supply structure | |
2941 | * @psp: pointer to the power_supply_property structure | |
2942 | * @val: pointer to the power_supply_propval union | |
2943 | * | |
2944 | * This function gets called when an application tries to get the ac/mains | |
2945 | * properties by reading the sysfs files. | |
2946 | * AC/Mains properties are online, present and voltage. | |
2947 | * online: ac/mains charging is in progress or not | |
2948 | * present: presence of the ac/mains | |
2949 | * voltage: AC/Mains voltage | |
2950 | * Returns error code in case of failure else 0(on success) | |
2951 | */ | |
2952 | static int ab8500_charger_ac_get_property(struct power_supply *psy, | |
2953 | enum power_supply_property psp, | |
2954 | union power_supply_propval *val) | |
2955 | { | |
2956 | struct ab8500_charger *di; | |
a864c5a8 | 2957 | int ret; |
84edbeea AM |
2958 | |
2959 | di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy)); | |
2960 | ||
2961 | switch (psp) { | |
2962 | case POWER_SUPPLY_PROP_HEALTH: | |
2963 | if (di->flags.mainextchnotok) | |
2964 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
2965 | else if (di->ac.wd_expired || di->usb.wd_expired) | |
2966 | val->intval = POWER_SUPPLY_HEALTH_DEAD; | |
2967 | else if (di->flags.main_thermal_prot) | |
2968 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
2969 | else | |
2970 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
2971 | break; | |
2972 | case POWER_SUPPLY_PROP_ONLINE: | |
2973 | val->intval = di->ac.charger_online; | |
2974 | break; | |
2975 | case POWER_SUPPLY_PROP_PRESENT: | |
2976 | val->intval = di->ac.charger_connected; | |
2977 | break; | |
2978 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a864c5a8 JA |
2979 | ret = ab8500_charger_get_ac_voltage(di); |
2980 | if (ret >= 0) | |
2981 | di->ac.charger_voltage = ret; | |
2982 | /* On error, use previous value */ | |
84edbeea AM |
2983 | val->intval = di->ac.charger_voltage * 1000; |
2984 | break; | |
2985 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
2986 | /* | |
2987 | * This property is used to indicate when CV mode is entered | |
2988 | * for the AC charger | |
2989 | */ | |
2990 | di->ac.cv_active = ab8500_charger_ac_cv(di); | |
2991 | val->intval = di->ac.cv_active; | |
2992 | break; | |
2993 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
a864c5a8 JA |
2994 | ret = ab8500_charger_get_ac_current(di); |
2995 | if (ret >= 0) | |
2996 | di->ac.charger_current = ret; | |
2997 | val->intval = di->ac.charger_current * 1000; | |
84edbeea AM |
2998 | break; |
2999 | default: | |
3000 | return -EINVAL; | |
3001 | } | |
3002 | return 0; | |
3003 | } | |
3004 | ||
3005 | /** | |
3006 | * ab8500_charger_usb_get_property() - get the usb properties | |
3007 | * @psy: pointer to the power_supply structure | |
3008 | * @psp: pointer to the power_supply_property structure | |
3009 | * @val: pointer to the power_supply_propval union | |
3010 | * | |
3011 | * This function gets called when an application tries to get the usb | |
3012 | * properties by reading the sysfs files. | |
3013 | * USB properties are online, present and voltage. | |
3014 | * online: usb charging is in progress or not | |
3015 | * present: presence of the usb | |
3016 | * voltage: vbus voltage | |
3017 | * Returns error code in case of failure else 0(on success) | |
3018 | */ | |
3019 | static int ab8500_charger_usb_get_property(struct power_supply *psy, | |
3020 | enum power_supply_property psp, | |
3021 | union power_supply_propval *val) | |
3022 | { | |
3023 | struct ab8500_charger *di; | |
a864c5a8 | 3024 | int ret; |
84edbeea AM |
3025 | |
3026 | di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy)); | |
3027 | ||
3028 | switch (psp) { | |
3029 | case POWER_SUPPLY_PROP_HEALTH: | |
3030 | if (di->flags.usbchargernotok) | |
3031 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
3032 | else if (di->ac.wd_expired || di->usb.wd_expired) | |
3033 | val->intval = POWER_SUPPLY_HEALTH_DEAD; | |
3034 | else if (di->flags.usb_thermal_prot) | |
3035 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
3036 | else if (di->flags.vbus_ovv) | |
3037 | val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
3038 | else | |
3039 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
3040 | break; | |
3041 | case POWER_SUPPLY_PROP_ONLINE: | |
3042 | val->intval = di->usb.charger_online; | |
3043 | break; | |
3044 | case POWER_SUPPLY_PROP_PRESENT: | |
3045 | val->intval = di->usb.charger_connected; | |
3046 | break; | |
3047 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a864c5a8 JA |
3048 | ret = ab8500_charger_get_vbus_voltage(di); |
3049 | if (ret >= 0) | |
3050 | di->usb.charger_voltage = ret; | |
84edbeea AM |
3051 | val->intval = di->usb.charger_voltage * 1000; |
3052 | break; | |
3053 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
3054 | /* | |
3055 | * This property is used to indicate when CV mode is entered | |
3056 | * for the USB charger | |
3057 | */ | |
3058 | di->usb.cv_active = ab8500_charger_usb_cv(di); | |
3059 | val->intval = di->usb.cv_active; | |
3060 | break; | |
3061 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
a864c5a8 JA |
3062 | ret = ab8500_charger_get_usb_current(di); |
3063 | if (ret >= 0) | |
3064 | di->usb.charger_current = ret; | |
3065 | val->intval = di->usb.charger_current * 1000; | |
84edbeea AM |
3066 | break; |
3067 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
3068 | /* | |
3069 | * This property is used to indicate when VBUS has collapsed | |
3070 | * due to too high output current from the USB charger | |
3071 | */ | |
3072 | if (di->flags.vbus_collapse) | |
3073 | val->intval = 1; | |
3074 | else | |
3075 | val->intval = 0; | |
3076 | break; | |
3077 | default: | |
3078 | return -EINVAL; | |
3079 | } | |
3080 | return 0; | |
3081 | } | |
3082 | ||
3083 | /** | |
3084 | * ab8500_charger_init_hw_registers() - Set up charger related registers | |
3085 | * @di: pointer to the ab8500_charger structure | |
3086 | * | |
3087 | * Set up charger OVV, watchdog and maximum voltage registers as well as | |
3088 | * charging of the backup battery | |
3089 | */ | |
3090 | static int ab8500_charger_init_hw_registers(struct ab8500_charger *di) | |
3091 | { | |
3092 | int ret = 0; | |
0f4aa401 | 3093 | u8 bup_vch_range = 0, vbup33_vrtcn = 0; |
84edbeea AM |
3094 | |
3095 | /* Setup maximum charger current and voltage for ABB cut2.0 */ | |
3096 | if (!is_ab8500_1p1_or_earlier(di->parent)) { | |
3097 | ret = abx500_set_register_interruptible(di->dev, | |
3098 | AB8500_CHARGER, | |
3099 | AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6); | |
3100 | if (ret) { | |
3101 | dev_err(di->dev, | |
3102 | "failed to set CH_VOLT_LVL_MAX_REG\n"); | |
3103 | goto out; | |
3104 | } | |
3105 | ||
861a30da LJ |
3106 | if (is_ab8540(di->parent)) |
3107 | ret = abx500_set_register_interruptible(di->dev, | |
3108 | AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG, | |
3109 | CH_OP_CUR_LVL_2P); | |
3110 | else | |
3111 | ret = abx500_set_register_interruptible(di->dev, | |
3112 | AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG, | |
3113 | CH_OP_CUR_LVL_1P6); | |
84edbeea AM |
3114 | if (ret) { |
3115 | dev_err(di->dev, | |
3116 | "failed to set CH_OPT_CRNTLVL_MAX_REG\n"); | |
3117 | goto out; | |
3118 | } | |
3119 | } | |
3120 | ||
861a30da LJ |
3121 | if (is_ab9540_2p0(di->parent) || is_ab9540_3p0(di->parent) |
3122 | || is_ab8505_2p0(di->parent) || is_ab8540(di->parent)) | |
0ed5107f JA |
3123 | ret = abx500_mask_and_set_register_interruptible(di->dev, |
3124 | AB8500_CHARGER, | |
3125 | AB8500_USBCH_CTRL2_REG, | |
3126 | VBUS_AUTO_IN_CURR_LIM_ENA, | |
3127 | VBUS_AUTO_IN_CURR_LIM_ENA); | |
3128 | else | |
3129 | /* | |
3130 | * VBUS OVV set to 6.3V and enable automatic current limitation | |
3131 | */ | |
3132 | ret = abx500_set_register_interruptible(di->dev, | |
3133 | AB8500_CHARGER, | |
3134 | AB8500_USBCH_CTRL2_REG, | |
3135 | VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA); | |
84edbeea | 3136 | if (ret) { |
0ed5107f JA |
3137 | dev_err(di->dev, |
3138 | "failed to set automatic current limitation\n"); | |
84edbeea AM |
3139 | goto out; |
3140 | } | |
3141 | ||
3142 | /* Enable main watchdog in OTP */ | |
3143 | ret = abx500_set_register_interruptible(di->dev, | |
3144 | AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD); | |
3145 | if (ret) { | |
3146 | dev_err(di->dev, "failed to enable main WD in OTP\n"); | |
3147 | goto out; | |
3148 | } | |
3149 | ||
3150 | /* Enable main watchdog */ | |
3151 | ret = abx500_set_register_interruptible(di->dev, | |
3152 | AB8500_SYS_CTRL2_BLOCK, | |
3153 | AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA); | |
3154 | if (ret) { | |
3155 | dev_err(di->dev, "faile to enable main watchdog\n"); | |
3156 | goto out; | |
3157 | } | |
3158 | ||
3159 | /* | |
3160 | * Due to internal synchronisation, Enable and Kick watchdog bits | |
3161 | * cannot be enabled in a single write. | |
3162 | * A minimum delay of 2*32 kHz period (62.5µs) must be inserted | |
3163 | * between writing Enable then Kick bits. | |
3164 | */ | |
3165 | udelay(63); | |
3166 | ||
3167 | /* Kick main watchdog */ | |
3168 | ret = abx500_set_register_interruptible(di->dev, | |
3169 | AB8500_SYS_CTRL2_BLOCK, | |
3170 | AB8500_MAIN_WDOG_CTRL_REG, | |
3171 | (MAIN_WDOG_ENA | MAIN_WDOG_KICK)); | |
3172 | if (ret) { | |
3173 | dev_err(di->dev, "failed to kick main watchdog\n"); | |
3174 | goto out; | |
3175 | } | |
3176 | ||
3177 | /* Disable main watchdog */ | |
3178 | ret = abx500_set_register_interruptible(di->dev, | |
3179 | AB8500_SYS_CTRL2_BLOCK, | |
3180 | AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS); | |
3181 | if (ret) { | |
3182 | dev_err(di->dev, "failed to disable main watchdog\n"); | |
3183 | goto out; | |
3184 | } | |
3185 | ||
3186 | /* Set watchdog timeout */ | |
3187 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
3188 | AB8500_CH_WD_TIMER_REG, WD_TIMER); | |
3189 | if (ret) { | |
3190 | dev_err(di->dev, "failed to set charger watchdog timeout\n"); | |
34c11a70 POH |
3191 | goto out; |
3192 | } | |
3193 | ||
3194 | ret = ab8500_charger_led_en(di, false); | |
3195 | if (ret < 0) { | |
3196 | dev_err(di->dev, "failed to disable LED\n"); | |
3197 | goto out; | |
3198 | } | |
3199 | ||
84edbeea | 3200 | /* Backup battery voltage and current */ |
0f4aa401 YQ |
3201 | if (di->bm->bkup_bat_v > BUP_VCH_SEL_3P1V) |
3202 | bup_vch_range = BUP_VCH_RANGE; | |
3203 | if (di->bm->bkup_bat_v == BUP_VCH_SEL_3P3V) | |
3204 | vbup33_vrtcn = VBUP33_VRTCN; | |
3205 | ||
84edbeea AM |
3206 | ret = abx500_set_register_interruptible(di->dev, |
3207 | AB8500_RTC, | |
3208 | AB8500_RTC_BACKUP_CHG_REG, | |
0f4aa401 | 3209 | (di->bm->bkup_bat_v & 0x3) | di->bm->bkup_bat_i); |
84edbeea AM |
3210 | if (ret) { |
3211 | dev_err(di->dev, "failed to setup backup battery charging\n"); | |
3212 | goto out; | |
3213 | } | |
0f4aa401 YQ |
3214 | if (is_ab8540(di->parent)) { |
3215 | ret = abx500_set_register_interruptible(di->dev, | |
3216 | AB8500_RTC, | |
3217 | AB8500_RTC_CTRL1_REG, | |
3218 | bup_vch_range | vbup33_vrtcn); | |
3219 | if (ret) { | |
861a30da LJ |
3220 | dev_err(di->dev, |
3221 | "failed to setup backup battery charging\n"); | |
0f4aa401 YQ |
3222 | goto out; |
3223 | } | |
3224 | } | |
84edbeea AM |
3225 | |
3226 | /* Enable backup battery charging */ | |
3227 | abx500_mask_and_set_register_interruptible(di->dev, | |
3228 | AB8500_RTC, AB8500_RTC_CTRL_REG, | |
3229 | RTC_BUP_CH_ENA, RTC_BUP_CH_ENA); | |
3230 | if (ret < 0) | |
3231 | dev_err(di->dev, "%s mask and set failed\n", __func__); | |
3232 | ||
db43e6c4 LJ |
3233 | if (is_ab8540(di->parent)) { |
3234 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
3235 | AB8500_CHARGER, AB8540_USB_PP_MODE_REG, | |
3236 | BUS_VSYS_VOL_SELECT_MASK, BUS_VSYS_VOL_SELECT_3P6V); | |
3237 | if (ret) { | |
861a30da LJ |
3238 | dev_err(di->dev, |
3239 | "failed to setup usb power path vsys voltage\n"); | |
db43e6c4 LJ |
3240 | goto out; |
3241 | } | |
3242 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
3243 | AB8500_CHARGER, AB8540_USB_PP_CHR_REG, | |
3244 | BUS_PP_PRECHG_CURRENT_MASK, 0); | |
3245 | if (ret) { | |
861a30da LJ |
3246 | dev_err(di->dev, |
3247 | "failed to setup usb power path prechage current\n"); | |
db43e6c4 LJ |
3248 | goto out; |
3249 | } | |
3250 | } | |
3251 | ||
84edbeea AM |
3252 | out: |
3253 | return ret; | |
3254 | } | |
3255 | ||
3256 | /* | |
3257 | * ab8500 charger driver interrupts and their respective isr | |
3258 | */ | |
3259 | static struct ab8500_charger_interrupts ab8500_charger_irq[] = { | |
3260 | {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler}, | |
3261 | {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler}, | |
3262 | {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler}, | |
3263 | {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler}, | |
3264 | {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler}, | |
3265 | {"VBUS_DET_F", ab8500_charger_vbusdetf_handler}, | |
3266 | {"VBUS_DET_R", ab8500_charger_vbusdetr_handler}, | |
3267 | {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler}, | |
3268 | {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler}, | |
3269 | {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler}, | |
3270 | {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler}, | |
3271 | {"VBUS_OVV", ab8500_charger_vbusovv_handler}, | |
3272 | {"CH_WD_EXP", ab8500_charger_chwdexp_handler}, | |
34c11a70 | 3273 | {"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler}, |
84edbeea AM |
3274 | }; |
3275 | ||
3276 | static int ab8500_charger_usb_notifier_call(struct notifier_block *nb, | |
3277 | unsigned long event, void *power) | |
3278 | { | |
3279 | struct ab8500_charger *di = | |
3280 | container_of(nb, struct ab8500_charger, nb); | |
3281 | enum ab8500_usb_state bm_usb_state; | |
3282 | unsigned mA = *((unsigned *)power); | |
3283 | ||
c9ade0fc LJ |
3284 | if (!di) |
3285 | return NOTIFY_DONE; | |
3286 | ||
84edbeea AM |
3287 | if (event != USB_EVENT_VBUS) { |
3288 | dev_dbg(di->dev, "not a standard host, returning\n"); | |
3289 | return NOTIFY_DONE; | |
3290 | } | |
3291 | ||
3292 | /* TODO: State is fabricate here. See if charger really needs USB | |
3293 | * state or if mA is enough | |
3294 | */ | |
3295 | if ((di->usb_state.usb_current == 2) && (mA > 2)) | |
3296 | bm_usb_state = AB8500_BM_USB_STATE_RESUME; | |
3297 | else if (mA == 0) | |
3298 | bm_usb_state = AB8500_BM_USB_STATE_RESET_HS; | |
3299 | else if (mA == 2) | |
3300 | bm_usb_state = AB8500_BM_USB_STATE_SUSPEND; | |
3301 | else if (mA >= 8) /* 8, 100, 500 */ | |
3302 | bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED; | |
3303 | else /* Should never occur */ | |
3304 | bm_usb_state = AB8500_BM_USB_STATE_RESET_FS; | |
3305 | ||
3306 | dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n", | |
3307 | __func__, bm_usb_state, mA); | |
3308 | ||
3309 | spin_lock(&di->usb_state.usb_lock); | |
34c11a70 POH |
3310 | di->usb_state.state_tmp = bm_usb_state; |
3311 | di->usb_state.usb_current_tmp = mA; | |
84edbeea AM |
3312 | spin_unlock(&di->usb_state.usb_lock); |
3313 | ||
34c11a70 POH |
3314 | /* |
3315 | * wait for some time until you get updates from the usb stack | |
3316 | * and negotiations are completed | |
3317 | */ | |
3318 | queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2); | |
84edbeea AM |
3319 | |
3320 | return NOTIFY_OK; | |
3321 | } | |
3322 | ||
3323 | #if defined(CONFIG_PM) | |
3324 | static int ab8500_charger_resume(struct platform_device *pdev) | |
3325 | { | |
3326 | int ret; | |
3327 | struct ab8500_charger *di = platform_get_drvdata(pdev); | |
3328 | ||
3329 | /* | |
3330 | * For ABB revision 1.0 and 1.1 there is a bug in the watchdog | |
3331 | * logic. That means we have to continously kick the charger | |
3332 | * watchdog even when no charger is connected. This is only | |
3333 | * valid once the AC charger has been enabled. This is | |
3334 | * a bug that is not handled by the algorithm and the | |
3335 | * watchdog have to be kicked by the charger driver | |
3336 | * when the AC charger is disabled | |
3337 | */ | |
3338 | if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) { | |
3339 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
3340 | AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); | |
3341 | if (ret) | |
3342 | dev_err(di->dev, "Failed to kick WD!\n"); | |
3343 | ||
3344 | /* If not already pending start a new timer */ | |
b09f86db LJ |
3345 | queue_delayed_work(di->charger_wq, &di->kick_wd_work, |
3346 | round_jiffies(WD_KICK_INTERVAL)); | |
84edbeea AM |
3347 | } |
3348 | ||
3349 | /* If we still have a HW failure, schedule a new check */ | |
3350 | if (di->flags.mainextchnotok || di->flags.vbus_ovv) { | |
3351 | queue_delayed_work(di->charger_wq, | |
3352 | &di->check_hw_failure_work, 0); | |
3353 | } | |
3354 | ||
34c11a70 POH |
3355 | if (di->flags.vbus_drop_end) |
3356 | queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0); | |
3357 | ||
84edbeea AM |
3358 | return 0; |
3359 | } | |
3360 | ||
3361 | static int ab8500_charger_suspend(struct platform_device *pdev, | |
3362 | pm_message_t state) | |
3363 | { | |
3364 | struct ab8500_charger *di = platform_get_drvdata(pdev); | |
3365 | ||
b09f86db LJ |
3366 | /* Cancel any pending jobs */ |
3367 | cancel_delayed_work(&di->check_hw_failure_work); | |
3368 | cancel_delayed_work(&di->vbus_drop_end_work); | |
34c11a70 | 3369 | |
53ef1f59 JA |
3370 | flush_delayed_work(&di->attach_work); |
3371 | flush_delayed_work(&di->usb_charger_attached_work); | |
3372 | flush_delayed_work(&di->ac_charger_attached_work); | |
3373 | flush_delayed_work(&di->check_usbchgnotok_work); | |
3374 | flush_delayed_work(&di->check_vbat_work); | |
3375 | flush_delayed_work(&di->kick_wd_work); | |
3376 | ||
3377 | flush_work(&di->usb_link_status_work); | |
3378 | flush_work(&di->ac_work); | |
3379 | flush_work(&di->detect_usb_type_work); | |
3380 | ||
34c11a70 POH |
3381 | if (atomic_read(&di->current_stepping_sessions)) |
3382 | return -EAGAIN; | |
3383 | ||
84edbeea AM |
3384 | return 0; |
3385 | } | |
3386 | #else | |
3387 | #define ab8500_charger_suspend NULL | |
3388 | #define ab8500_charger_resume NULL | |
3389 | #endif | |
3390 | ||
8891716e LJ |
3391 | static struct notifier_block charger_nb = { |
3392 | .notifier_call = ab8500_external_charger_prepare, | |
3393 | }; | |
3394 | ||
415ec69f | 3395 | static int ab8500_charger_remove(struct platform_device *pdev) |
84edbeea AM |
3396 | { |
3397 | struct ab8500_charger *di = platform_get_drvdata(pdev); | |
3398 | int i, irq, ret; | |
3399 | ||
3400 | /* Disable AC charging */ | |
3401 | ab8500_charger_ac_en(&di->ac_chg, false, 0, 0); | |
3402 | ||
3403 | /* Disable USB charging */ | |
3404 | ab8500_charger_usb_en(&di->usb_chg, false, 0, 0); | |
3405 | ||
3406 | /* Disable interrupts */ | |
3407 | for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) { | |
3408 | irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); | |
3409 | free_irq(irq, di); | |
3410 | } | |
3411 | ||
84edbeea AM |
3412 | /* Backup battery voltage and current disable */ |
3413 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
3414 | AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0); | |
3415 | if (ret < 0) | |
3416 | dev_err(di->dev, "%s mask and set failed\n", __func__); | |
3417 | ||
efd71c89 | 3418 | usb_unregister_notifier(di->usb_phy, &di->nb); |
721002ec | 3419 | usb_put_phy(di->usb_phy); |
84edbeea AM |
3420 | |
3421 | /* Delete the work queue */ | |
3422 | destroy_workqueue(di->charger_wq); | |
3423 | ||
8891716e LJ |
3424 | /* Unregister external charger enable notifier */ |
3425 | if (!di->ac_chg.enabled) | |
3426 | blocking_notifier_chain_unregister( | |
3427 | &charger_notifier_list, &charger_nb); | |
3428 | ||
84edbeea | 3429 | flush_scheduled_work(); |
72a90ddb | 3430 | if (di->usb_chg.enabled) |
01ec8c54 | 3431 | power_supply_unregister(&di->usb_chg.psy); |
405fea1c MC |
3432 | |
3433 | if (di->ac_chg.enabled && !di->ac_chg.external) | |
01ec8c54 | 3434 | power_supply_unregister(&di->ac_chg.psy); |
405fea1c | 3435 | |
84edbeea AM |
3436 | return 0; |
3437 | } | |
3438 | ||
4aef72db R |
3439 | static char *supply_interface[] = { |
3440 | "ab8500_chargalg", | |
3441 | "ab8500_fg", | |
3442 | "ab8500_btemp", | |
3443 | }; | |
3444 | ||
c8afa640 | 3445 | static int ab8500_charger_probe(struct platform_device *pdev) |
84edbeea | 3446 | { |
4aef72db | 3447 | struct device_node *np = pdev->dev.of_node; |
7722b799 | 3448 | struct abx500_bm_data *plat = pdev->dev.platform_data; |
2aac3de1 | 3449 | struct ab8500_charger *di; |
b269fff4 | 3450 | int irq, i, charger_status, ret = 0, ch_stat; |
84edbeea | 3451 | |
4aef72db R |
3452 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
3453 | if (!di) { | |
3454 | dev_err(&pdev->dev, "%s no mem for ab8500_charger\n", __func__); | |
84edbeea | 3455 | return -ENOMEM; |
4aef72db | 3456 | } |
7722b799 LJ |
3457 | |
3458 | if (!plat) { | |
3459 | dev_err(&pdev->dev, "no battery management data supplied\n"); | |
3460 | return -EINVAL; | |
3461 | } | |
3462 | di->bm = plat; | |
3463 | ||
3464 | if (np) { | |
3465 | ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm); | |
3466 | if (ret) { | |
3467 | dev_err(&pdev->dev, "failed to get battery information\n"); | |
3468 | return ret; | |
4aef72db | 3469 | } |
7722b799 LJ |
3470 | di->autopower_cfg = of_property_read_bool(np, "autopower_cfg"); |
3471 | } else | |
4aef72db | 3472 | di->autopower_cfg = false; |
84edbeea AM |
3473 | |
3474 | /* get parent data */ | |
3475 | di->dev = &pdev->dev; | |
3476 | di->parent = dev_get_drvdata(pdev->dev.parent); | |
3477 | di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0"); | |
3478 | ||
3479 | /* initialize lock */ | |
3480 | spin_lock_init(&di->usb_state.usb_lock); | |
34c11a70 | 3481 | mutex_init(&di->usb_ipt_crnt_lock); |
84edbeea | 3482 | |
84edbeea | 3483 | di->autopower = false; |
ff38090a | 3484 | di->invalid_charger_detect_state = 0; |
84edbeea AM |
3485 | |
3486 | /* AC supply */ | |
3487 | /* power_supply base class */ | |
3488 | di->ac_chg.psy.name = "ab8500_ac"; | |
3489 | di->ac_chg.psy.type = POWER_SUPPLY_TYPE_MAINS; | |
3490 | di->ac_chg.psy.properties = ab8500_charger_ac_props; | |
3491 | di->ac_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_ac_props); | |
3492 | di->ac_chg.psy.get_property = ab8500_charger_ac_get_property; | |
4aef72db R |
3493 | di->ac_chg.psy.supplied_to = supply_interface; |
3494 | di->ac_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface), | |
84edbeea AM |
3495 | /* ux500_charger sub-class */ |
3496 | di->ac_chg.ops.enable = &ab8500_charger_ac_en; | |
4dcdf577 | 3497 | di->ac_chg.ops.check_enable = &ab8500_charger_ac_check_enable; |
84edbeea AM |
3498 | di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick; |
3499 | di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current; | |
3500 | di->ac_chg.max_out_volt = ab8500_charger_voltage_map[ | |
3501 | ARRAY_SIZE(ab8500_charger_voltage_map) - 1]; | |
861a30da LJ |
3502 | di->ac_chg.max_out_curr = |
3503 | di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1]; | |
e07a5645 | 3504 | di->ac_chg.wdt_refresh = CHG_WD_INTERVAL; |
97034a1e | 3505 | di->ac_chg.enabled = di->bm->ac_enabled; |
e07a5645 | 3506 | di->ac_chg.external = false; |
84edbeea | 3507 | |
8891716e LJ |
3508 | /*notifier for external charger enabling*/ |
3509 | if (!di->ac_chg.enabled) | |
3510 | blocking_notifier_chain_register( | |
3511 | &charger_notifier_list, &charger_nb); | |
3512 | ||
84edbeea AM |
3513 | /* USB supply */ |
3514 | /* power_supply base class */ | |
3515 | di->usb_chg.psy.name = "ab8500_usb"; | |
3516 | di->usb_chg.psy.type = POWER_SUPPLY_TYPE_USB; | |
3517 | di->usb_chg.psy.properties = ab8500_charger_usb_props; | |
3518 | di->usb_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_usb_props); | |
3519 | di->usb_chg.psy.get_property = ab8500_charger_usb_get_property; | |
4aef72db R |
3520 | di->usb_chg.psy.supplied_to = supply_interface; |
3521 | di->usb_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface), | |
84edbeea AM |
3522 | /* ux500_charger sub-class */ |
3523 | di->usb_chg.ops.enable = &ab8500_charger_usb_en; | |
4dcdf577 | 3524 | di->usb_chg.ops.check_enable = &ab8500_charger_usb_check_enable; |
84edbeea AM |
3525 | di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick; |
3526 | di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current; | |
db43e6c4 LJ |
3527 | di->usb_chg.ops.pp_enable = &ab8540_charger_power_path_enable; |
3528 | di->usb_chg.ops.pre_chg_enable = &ab8540_charger_usb_pre_chg_enable; | |
84edbeea AM |
3529 | di->usb_chg.max_out_volt = ab8500_charger_voltage_map[ |
3530 | ARRAY_SIZE(ab8500_charger_voltage_map) - 1]; | |
861a30da LJ |
3531 | di->usb_chg.max_out_curr = |
3532 | di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1]; | |
e07a5645 | 3533 | di->usb_chg.wdt_refresh = CHG_WD_INTERVAL; |
97034a1e | 3534 | di->usb_chg.enabled = di->bm->usb_enabled; |
e07a5645 | 3535 | di->usb_chg.external = false; |
db43e6c4 | 3536 | di->usb_chg.power_path = di->bm->usb_power_path; |
f7470b5d | 3537 | di->usb_state.usb_current = -1; |
84edbeea AM |
3538 | |
3539 | /* Create a work queue for the charger */ | |
3540 | di->charger_wq = | |
3541 | create_singlethread_workqueue("ab8500_charger_wq"); | |
3542 | if (di->charger_wq == NULL) { | |
3543 | dev_err(di->dev, "failed to create work queue\n"); | |
4aef72db | 3544 | return -ENOMEM; |
84edbeea AM |
3545 | } |
3546 | ||
b269fff4 LJ |
3547 | mutex_init(&di->charger_attached_mutex); |
3548 | ||
84edbeea | 3549 | /* Init work for HW failure check */ |
203b42f7 | 3550 | INIT_DEFERRABLE_WORK(&di->check_hw_failure_work, |
84edbeea | 3551 | ab8500_charger_check_hw_failure_work); |
203b42f7 | 3552 | INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work, |
84edbeea AM |
3553 | ab8500_charger_check_usbchargernotok_work); |
3554 | ||
b269fff4 LJ |
3555 | INIT_DELAYED_WORK(&di->ac_charger_attached_work, |
3556 | ab8500_charger_ac_attached_work); | |
3557 | INIT_DELAYED_WORK(&di->usb_charger_attached_work, | |
3558 | ab8500_charger_usb_attached_work); | |
3559 | ||
84edbeea AM |
3560 | /* |
3561 | * For ABB revision 1.0 and 1.1 there is a bug in the watchdog | |
3562 | * logic. That means we have to continously kick the charger | |
3563 | * watchdog even when no charger is connected. This is only | |
3564 | * valid once the AC charger has been enabled. This is | |
3565 | * a bug that is not handled by the algorithm and the | |
3566 | * watchdog have to be kicked by the charger driver | |
3567 | * when the AC charger is disabled | |
3568 | */ | |
203b42f7 | 3569 | INIT_DEFERRABLE_WORK(&di->kick_wd_work, |
84edbeea AM |
3570 | ab8500_charger_kick_watchdog_work); |
3571 | ||
203b42f7 | 3572 | INIT_DEFERRABLE_WORK(&di->check_vbat_work, |
84edbeea AM |
3573 | ab8500_charger_check_vbat_work); |
3574 | ||
4b45f4a9 MC |
3575 | INIT_DELAYED_WORK(&di->attach_work, |
3576 | ab8500_charger_usb_link_attach_work); | |
3577 | ||
34c11a70 POH |
3578 | INIT_DELAYED_WORK(&di->usb_state_changed_work, |
3579 | ab8500_charger_usb_state_changed_work); | |
3580 | ||
3581 | INIT_DELAYED_WORK(&di->vbus_drop_end_work, | |
3582 | ab8500_charger_vbus_drop_end_work); | |
3583 | ||
84edbeea AM |
3584 | /* Init work for charger detection */ |
3585 | INIT_WORK(&di->usb_link_status_work, | |
3586 | ab8500_charger_usb_link_status_work); | |
3587 | INIT_WORK(&di->ac_work, ab8500_charger_ac_work); | |
3588 | INIT_WORK(&di->detect_usb_type_work, | |
3589 | ab8500_charger_detect_usb_type_work); | |
3590 | ||
84edbeea AM |
3591 | /* Init work for checking HW status */ |
3592 | INIT_WORK(&di->check_main_thermal_prot_work, | |
3593 | ab8500_charger_check_main_thermal_prot_work); | |
3594 | INIT_WORK(&di->check_usb_thermal_prot_work, | |
3595 | ab8500_charger_check_usb_thermal_prot_work); | |
3596 | ||
3597 | /* | |
3598 | * VDD ADC supply needs to be enabled from this driver when there | |
3599 | * is a charger connected to avoid erroneous BTEMP_HIGH/LOW | |
3600 | * interrupts during charging | |
3601 | */ | |
8feffd10 | 3602 | di->regu = devm_regulator_get(di->dev, "vddadc"); |
84edbeea AM |
3603 | if (IS_ERR(di->regu)) { |
3604 | ret = PTR_ERR(di->regu); | |
3605 | dev_err(di->dev, "failed to get vddadc regulator\n"); | |
3606 | goto free_charger_wq; | |
3607 | } | |
3608 | ||
3609 | ||
3610 | /* Initialize OVV, and other registers */ | |
3611 | ret = ab8500_charger_init_hw_registers(di); | |
3612 | if (ret) { | |
3613 | dev_err(di->dev, "failed to initialize ABB registers\n"); | |
8feffd10 | 3614 | goto free_charger_wq; |
84edbeea AM |
3615 | } |
3616 | ||
3617 | /* Register AC charger class */ | |
72a90ddb | 3618 | if (di->ac_chg.enabled) { |
01ec8c54 MJ |
3619 | ret = power_supply_register(di->dev, &di->ac_chg.psy); |
3620 | if (ret) { | |
3621 | dev_err(di->dev, "failed to register AC charger\n"); | |
3622 | goto free_charger_wq; | |
3623 | } | |
84edbeea AM |
3624 | } |
3625 | ||
3626 | /* Register USB charger class */ | |
72a90ddb | 3627 | if (di->usb_chg.enabled) { |
01ec8c54 MJ |
3628 | ret = power_supply_register(di->dev, &di->usb_chg.psy); |
3629 | if (ret) { | |
3630 | dev_err(di->dev, "failed to register USB charger\n"); | |
3631 | goto free_ac; | |
3632 | } | |
84edbeea AM |
3633 | } |
3634 | ||
662dca54 | 3635 | di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2); |
ded017ee | 3636 | if (IS_ERR_OR_NULL(di->usb_phy)) { |
efd71c89 | 3637 | dev_err(di->dev, "failed to get usb transceiver\n"); |
84edbeea AM |
3638 | ret = -EINVAL; |
3639 | goto free_usb; | |
3640 | } | |
3641 | di->nb.notifier_call = ab8500_charger_usb_notifier_call; | |
efd71c89 | 3642 | ret = usb_register_notifier(di->usb_phy, &di->nb); |
84edbeea | 3643 | if (ret) { |
efd71c89 AV |
3644 | dev_err(di->dev, "failed to register usb notifier\n"); |
3645 | goto put_usb_phy; | |
84edbeea AM |
3646 | } |
3647 | ||
3648 | /* Identify the connected charger types during startup */ | |
34c11a70 | 3649 | charger_status = ab8500_charger_detect_chargers(di, true); |
84edbeea AM |
3650 | if (charger_status & AC_PW_CONN) { |
3651 | di->ac.charger_connected = 1; | |
3652 | di->ac_conn = true; | |
3653 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
3654 | sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present"); | |
3655 | } | |
3656 | ||
3657 | if (charger_status & USB_PW_CONN) { | |
84edbeea AM |
3658 | di->vbus_detected = true; |
3659 | di->vbus_detected_start = true; | |
3660 | queue_work(di->charger_wq, | |
3661 | &di->detect_usb_type_work); | |
3662 | } | |
3663 | ||
3664 | /* Register interrupts */ | |
3665 | for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) { | |
3666 | irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); | |
3667 | ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr, | |
3668 | IRQF_SHARED | IRQF_NO_SUSPEND, | |
3669 | ab8500_charger_irq[i].name, di); | |
3670 | ||
3671 | if (ret != 0) { | |
3672 | dev_err(di->dev, "failed to request %s IRQ %d: %d\n" | |
3673 | , ab8500_charger_irq[i].name, irq, ret); | |
3674 | goto free_irq; | |
3675 | } | |
3676 | dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", | |
3677 | ab8500_charger_irq[i].name, irq, ret); | |
3678 | } | |
3679 | ||
3680 | platform_set_drvdata(pdev, di); | |
3681 | ||
b269fff4 LJ |
3682 | mutex_lock(&di->charger_attached_mutex); |
3683 | ||
34c11a70 | 3684 | ch_stat = ab8500_charger_detect_chargers(di, false); |
b269fff4 LJ |
3685 | |
3686 | if ((ch_stat & AC_PW_CONN) == AC_PW_CONN) { | |
261c5136 RV |
3687 | if (is_ab8500(di->parent)) |
3688 | queue_delayed_work(di->charger_wq, | |
3689 | &di->ac_charger_attached_work, | |
3690 | HZ); | |
b269fff4 LJ |
3691 | } |
3692 | if ((ch_stat & USB_PW_CONN) == USB_PW_CONN) { | |
261c5136 RV |
3693 | if (is_ab8500(di->parent)) |
3694 | queue_delayed_work(di->charger_wq, | |
3695 | &di->usb_charger_attached_work, | |
3696 | HZ); | |
b269fff4 LJ |
3697 | } |
3698 | ||
3699 | mutex_unlock(&di->charger_attached_mutex); | |
3700 | ||
84edbeea AM |
3701 | return ret; |
3702 | ||
3703 | free_irq: | |
efd71c89 | 3704 | usb_unregister_notifier(di->usb_phy, &di->nb); |
84edbeea AM |
3705 | |
3706 | /* We also have to free all successfully registered irqs */ | |
3707 | for (i = i - 1; i >= 0; i--) { | |
3708 | irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); | |
3709 | free_irq(irq, di); | |
3710 | } | |
efd71c89 | 3711 | put_usb_phy: |
721002ec | 3712 | usb_put_phy(di->usb_phy); |
84edbeea | 3713 | free_usb: |
72a90ddb | 3714 | if (di->usb_chg.enabled) |
01ec8c54 | 3715 | power_supply_unregister(&di->usb_chg.psy); |
84edbeea | 3716 | free_ac: |
72a90ddb | 3717 | if (di->ac_chg.enabled) |
01ec8c54 | 3718 | power_supply_unregister(&di->ac_chg.psy); |
84edbeea AM |
3719 | free_charger_wq: |
3720 | destroy_workqueue(di->charger_wq); | |
84edbeea AM |
3721 | return ret; |
3722 | } | |
3723 | ||
4aef72db R |
3724 | static const struct of_device_id ab8500_charger_match[] = { |
3725 | { .compatible = "stericsson,ab8500-charger", }, | |
3726 | { }, | |
3727 | }; | |
3728 | ||
84edbeea AM |
3729 | static struct platform_driver ab8500_charger_driver = { |
3730 | .probe = ab8500_charger_probe, | |
28ea73f4 | 3731 | .remove = ab8500_charger_remove, |
84edbeea AM |
3732 | .suspend = ab8500_charger_suspend, |
3733 | .resume = ab8500_charger_resume, | |
3734 | .driver = { | |
3735 | .name = "ab8500-charger", | |
3736 | .owner = THIS_MODULE, | |
4aef72db | 3737 | .of_match_table = ab8500_charger_match, |
84edbeea AM |
3738 | }, |
3739 | }; | |
3740 | ||
3741 | static int __init ab8500_charger_init(void) | |
3742 | { | |
3743 | return platform_driver_register(&ab8500_charger_driver); | |
3744 | } | |
3745 | ||
3746 | static void __exit ab8500_charger_exit(void) | |
3747 | { | |
3748 | platform_driver_unregister(&ab8500_charger_driver); | |
3749 | } | |
3750 | ||
3751 | subsys_initcall_sync(ab8500_charger_init); | |
3752 | module_exit(ab8500_charger_exit); | |
3753 | ||
3754 | MODULE_LICENSE("GPL v2"); | |
3755 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy"); | |
3756 | MODULE_ALIAS("platform:ab8500-charger"); | |
3757 | MODULE_DESCRIPTION("AB8500 charger management driver"); |