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> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/power_supply.h> | |
21 | #include <linux/completion.h> | |
22 | #include <linux/regulator/consumer.h> | |
23 | #include <linux/err.h> | |
24 | #include <linux/workqueue.h> | |
25 | #include <linux/kobject.h> | |
4aef72db R |
26 | #include <linux/of.h> |
27 | #include <linux/mfd/core.h> | |
84edbeea AM |
28 | #include <linux/mfd/abx500/ab8500.h> |
29 | #include <linux/mfd/abx500.h> | |
30 | #include <linux/mfd/abx500/ab8500-bm.h> | |
31 | #include <linux/mfd/abx500/ab8500-gpadc.h> | |
32 | #include <linux/mfd/abx500/ux500_chargalg.h> | |
33 | #include <linux/usb/otg.h> | |
b269fff4 | 34 | #include <linux/mutex.h> |
84edbeea AM |
35 | |
36 | /* Charger constants */ | |
37 | #define NO_PW_CONN 0 | |
38 | #define AC_PW_CONN 1 | |
39 | #define USB_PW_CONN 2 | |
40 | ||
41 | #define MAIN_WDOG_ENA 0x01 | |
42 | #define MAIN_WDOG_KICK 0x02 | |
43 | #define MAIN_WDOG_DIS 0x00 | |
44 | #define CHARG_WD_KICK 0x01 | |
45 | #define MAIN_CH_ENA 0x01 | |
46 | #define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02 | |
47 | #define USB_CH_ENA 0x01 | |
48 | #define USB_CHG_NO_OVERSHOOT_ENA_N 0x02 | |
49 | #define MAIN_CH_DET 0x01 | |
50 | #define MAIN_CH_CV_ON 0x04 | |
51 | #define USB_CH_CV_ON 0x08 | |
52 | #define VBUS_DET_DBNC100 0x02 | |
53 | #define VBUS_DET_DBNC1 0x01 | |
54 | #define OTP_ENABLE_WD 0x01 | |
55 | ||
56 | #define MAIN_CH_INPUT_CURR_SHIFT 4 | |
57 | #define VBUS_IN_CURR_LIM_SHIFT 4 | |
34c11a70 | 58 | #define AUTO_VBUS_IN_CURR_LIM_SHIFT 4 |
84edbeea AM |
59 | |
60 | #define LED_INDICATOR_PWM_ENA 0x01 | |
61 | #define LED_INDICATOR_PWM_DIS 0x00 | |
62 | #define LED_IND_CUR_5MA 0x04 | |
63 | #define LED_INDICATOR_PWM_DUTY_252_256 0xBF | |
64 | ||
65 | /* HW failure constants */ | |
66 | #define MAIN_CH_TH_PROT 0x02 | |
67 | #define VBUS_CH_NOK 0x08 | |
68 | #define USB_CH_TH_PROT 0x02 | |
69 | #define VBUS_OVV_TH 0x01 | |
70 | #define MAIN_CH_NOK 0x01 | |
71 | #define VBUS_DET 0x80 | |
72 | ||
b269fff4 LJ |
73 | #define MAIN_CH_STATUS2_MAINCHGDROP 0x80 |
74 | #define MAIN_CH_STATUS2_MAINCHARGERDETDBNC 0x40 | |
75 | #define USB_CH_VBUSDROP 0x40 | |
76 | #define USB_CH_VBUSDETDBNC 0x01 | |
77 | ||
84edbeea AM |
78 | /* UsbLineStatus register bit masks */ |
79 | #define AB8500_USB_LINK_STATUS 0x78 | |
80 | #define AB8500_STD_HOST_SUSP 0x18 | |
81 | ||
82 | /* Watchdog timeout constant */ | |
83 | #define WD_TIMER 0x30 /* 4min */ | |
84 | #define WD_KICK_INTERVAL (60 * HZ) | |
85 | ||
86 | /* Lowest charger voltage is 3.39V -> 0x4E */ | |
87 | #define LOW_VOLT_REG 0x4E | |
88 | ||
f8e96dff JB |
89 | /* Step up/down delay in us */ |
90 | #define STEP_UDELAY 1000 | |
91 | ||
b269fff4 LJ |
92 | #define CHARGER_STATUS_POLL 10 /* in ms */ |
93 | ||
e07a5645 LP |
94 | #define CHG_WD_INTERVAL (60 * HZ) |
95 | ||
b0163222 | 96 | #define AB8500_SW_CONTROL_FALLBACK 0x03 |
34c11a70 POH |
97 | /* Wait for enumeration before charing in us */ |
98 | #define WAIT_ACA_RID_ENUMERATION (5 * 1000) | |
b0163222 | 99 | |
84edbeea AM |
100 | /* UsbLineStatus register - usb types */ |
101 | enum ab8500_charger_link_status { | |
102 | USB_STAT_NOT_CONFIGURED, | |
103 | USB_STAT_STD_HOST_NC, | |
104 | USB_STAT_STD_HOST_C_NS, | |
105 | USB_STAT_STD_HOST_C_S, | |
106 | USB_STAT_HOST_CHG_NM, | |
107 | USB_STAT_HOST_CHG_HS, | |
108 | USB_STAT_HOST_CHG_HS_CHIRP, | |
109 | USB_STAT_DEDICATED_CHG, | |
110 | USB_STAT_ACA_RID_A, | |
111 | USB_STAT_ACA_RID_B, | |
112 | USB_STAT_ACA_RID_C_NM, | |
113 | USB_STAT_ACA_RID_C_HS, | |
114 | USB_STAT_ACA_RID_C_HS_CHIRP, | |
115 | USB_STAT_HM_IDGND, | |
116 | USB_STAT_RESERVED, | |
117 | USB_STAT_NOT_VALID_LINK, | |
74a8e349 HB |
118 | USB_STAT_PHY_EN, |
119 | USB_STAT_SUP_NO_IDGND_VBUS, | |
120 | USB_STAT_SUP_IDGND_VBUS, | |
121 | USB_STAT_CHARGER_LINE_1, | |
122 | USB_STAT_CARKIT_1, | |
123 | USB_STAT_CARKIT_2, | |
124 | USB_STAT_ACA_DOCK_CHARGER, | |
84edbeea AM |
125 | }; |
126 | ||
127 | enum ab8500_usb_state { | |
128 | AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */ | |
129 | AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */ | |
130 | AB8500_BM_USB_STATE_CONFIGURED, | |
131 | AB8500_BM_USB_STATE_SUSPEND, | |
132 | AB8500_BM_USB_STATE_RESUME, | |
133 | AB8500_BM_USB_STATE_MAX, | |
134 | }; | |
135 | ||
136 | /* VBUS input current limits supported in AB8500 in mA */ | |
137 | #define USB_CH_IP_CUR_LVL_0P05 50 | |
138 | #define USB_CH_IP_CUR_LVL_0P09 98 | |
139 | #define USB_CH_IP_CUR_LVL_0P19 193 | |
140 | #define USB_CH_IP_CUR_LVL_0P29 290 | |
141 | #define USB_CH_IP_CUR_LVL_0P38 380 | |
142 | #define USB_CH_IP_CUR_LVL_0P45 450 | |
143 | #define USB_CH_IP_CUR_LVL_0P5 500 | |
144 | #define USB_CH_IP_CUR_LVL_0P6 600 | |
145 | #define USB_CH_IP_CUR_LVL_0P7 700 | |
146 | #define USB_CH_IP_CUR_LVL_0P8 800 | |
147 | #define USB_CH_IP_CUR_LVL_0P9 900 | |
148 | #define USB_CH_IP_CUR_LVL_1P0 1000 | |
149 | #define USB_CH_IP_CUR_LVL_1P1 1100 | |
150 | #define USB_CH_IP_CUR_LVL_1P3 1300 | |
151 | #define USB_CH_IP_CUR_LVL_1P4 1400 | |
152 | #define USB_CH_IP_CUR_LVL_1P5 1500 | |
153 | ||
154 | #define VBAT_TRESH_IP_CUR_RED 3800 | |
155 | ||
156 | #define to_ab8500_charger_usb_device_info(x) container_of((x), \ | |
157 | struct ab8500_charger, usb_chg) | |
158 | #define to_ab8500_charger_ac_device_info(x) container_of((x), \ | |
159 | struct ab8500_charger, ac_chg) | |
160 | ||
161 | /** | |
162 | * struct ab8500_charger_interrupts - ab8500 interupts | |
163 | * @name: name of the interrupt | |
164 | * @isr function pointer to the isr | |
165 | */ | |
166 | struct ab8500_charger_interrupts { | |
167 | char *name; | |
168 | irqreturn_t (*isr)(int irq, void *data); | |
169 | }; | |
170 | ||
171 | struct ab8500_charger_info { | |
172 | int charger_connected; | |
173 | int charger_online; | |
174 | int charger_voltage; | |
175 | int cv_active; | |
176 | bool wd_expired; | |
a864c5a8 | 177 | int charger_current; |
84edbeea AM |
178 | }; |
179 | ||
180 | struct ab8500_charger_event_flags { | |
181 | bool mainextchnotok; | |
182 | bool main_thermal_prot; | |
183 | bool usb_thermal_prot; | |
184 | bool vbus_ovv; | |
185 | bool usbchargernotok; | |
186 | bool chgwdexp; | |
187 | bool vbus_collapse; | |
34c11a70 | 188 | bool vbus_drop_end; |
84edbeea AM |
189 | }; |
190 | ||
191 | struct ab8500_charger_usb_state { | |
84edbeea | 192 | int usb_current; |
34c11a70 | 193 | int usb_current_tmp; |
84edbeea | 194 | enum ab8500_usb_state state; |
34c11a70 | 195 | enum ab8500_usb_state state_tmp; |
84edbeea AM |
196 | spinlock_t usb_lock; |
197 | }; | |
198 | ||
199 | /** | |
200 | * struct ab8500_charger - ab8500 Charger device information | |
201 | * @dev: Pointer to the structure device | |
202 | * @max_usb_in_curr: Max USB charger input current | |
203 | * @vbus_detected: VBUS detected | |
204 | * @vbus_detected_start: | |
205 | * VBUS detected during startup | |
206 | * @ac_conn: This will be true when the AC charger has been plugged | |
207 | * @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC | |
208 | * charger is enabled | |
209 | * @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB | |
210 | * charger is enabled | |
211 | * @vbat Battery voltage | |
212 | * @old_vbat Previously measured battery voltage | |
4b45f4a9 | 213 | * @usb_device_is_unrecognised USB device is unrecognised by the hardware |
84edbeea | 214 | * @autopower Indicate if we should have automatic pwron after pwrloss |
4aef72db | 215 | * @autopower_cfg platform specific power config support for "pwron after pwrloss" |
ff38090a | 216 | * @invalid_charger_detect_state State when forcing AB to use invalid charger |
34c11a70 POH |
217 | * @is_usb_host: Indicate if last detected USB type is host |
218 | * @is_aca_rid: Incicate if accessory is ACA type | |
219 | * @current_stepping_sessions: | |
220 | * Counter for current stepping sessions | |
84edbeea AM |
221 | * @parent: Pointer to the struct ab8500 |
222 | * @gpadc: Pointer to the struct gpadc | |
b0284de0 | 223 | * @bm: Platform specific battery management information |
84edbeea AM |
224 | * @flags: Structure for information about events triggered |
225 | * @usb_state: Structure for usb stack information | |
226 | * @ac_chg: AC charger power supply | |
227 | * @usb_chg: USB charger power supply | |
228 | * @ac: Structure that holds the AC charger properties | |
229 | * @usb: Structure that holds the USB charger properties | |
230 | * @regu: Pointer to the struct regulator | |
231 | * @charger_wq: Work queue for the IRQs and checking HW state | |
34c11a70 POH |
232 | * @usb_ipt_crnt_lock: Lock to protect VBUS input current setting from mutuals |
233 | * @pm_lock: Lock to prevent system to suspend | |
84edbeea AM |
234 | * @check_vbat_work Work for checking vbat threshold to adjust vbus current |
235 | * @check_hw_failure_work: Work for checking HW state | |
236 | * @check_usbchgnotok_work: Work for checking USB charger not ok status | |
237 | * @kick_wd_work: Work for kicking the charger watchdog in case | |
238 | * of ABB rev 1.* due to the watchog logic bug | |
b269fff4 LJ |
239 | * @ac_charger_attached_work: Work for checking if AC charger is still |
240 | * connected | |
241 | * @usb_charger_attached_work: Work for checking if USB charger is still | |
242 | * connected | |
84edbeea AM |
243 | * @ac_work: Work for checking AC charger connection |
244 | * @detect_usb_type_work: Work for detecting the USB type connected | |
245 | * @usb_link_status_work: Work for checking the new USB link status | |
246 | * @usb_state_changed_work: Work for checking USB state | |
34c11a70 POH |
247 | * @attach_work: Work for detecting USB type |
248 | * @vbus_drop_end_work: Work for detecting VBUS drop end | |
84edbeea AM |
249 | * @check_main_thermal_prot_work: |
250 | * Work for checking Main thermal status | |
251 | * @check_usb_thermal_prot_work: | |
252 | * Work for checking USB thermal status | |
b269fff4 | 253 | * @charger_attached_mutex: For controlling the wakelock |
84edbeea AM |
254 | */ |
255 | struct ab8500_charger { | |
256 | struct device *dev; | |
257 | int max_usb_in_curr; | |
258 | bool vbus_detected; | |
259 | bool vbus_detected_start; | |
260 | bool ac_conn; | |
261 | bool vddadc_en_ac; | |
262 | bool vddadc_en_usb; | |
263 | int vbat; | |
264 | int old_vbat; | |
4b45f4a9 | 265 | bool usb_device_is_unrecognised; |
84edbeea | 266 | bool autopower; |
4aef72db | 267 | bool autopower_cfg; |
ff38090a | 268 | int invalid_charger_detect_state; |
34c11a70 POH |
269 | bool is_usb_host; |
270 | int is_aca_rid; | |
271 | atomic_t current_stepping_sessions; | |
84edbeea AM |
272 | struct ab8500 *parent; |
273 | struct ab8500_gpadc *gpadc; | |
b0284de0 | 274 | struct abx500_bm_data *bm; |
84edbeea AM |
275 | struct ab8500_charger_event_flags flags; |
276 | struct ab8500_charger_usb_state usb_state; | |
277 | struct ux500_charger ac_chg; | |
278 | struct ux500_charger usb_chg; | |
279 | struct ab8500_charger_info ac; | |
280 | struct ab8500_charger_info usb; | |
281 | struct regulator *regu; | |
282 | struct workqueue_struct *charger_wq; | |
34c11a70 | 283 | struct mutex usb_ipt_crnt_lock; |
84edbeea AM |
284 | struct delayed_work check_vbat_work; |
285 | struct delayed_work check_hw_failure_work; | |
286 | struct delayed_work check_usbchgnotok_work; | |
287 | struct delayed_work kick_wd_work; | |
34c11a70 | 288 | struct delayed_work usb_state_changed_work; |
4b45f4a9 | 289 | struct delayed_work attach_work; |
b269fff4 LJ |
290 | struct delayed_work ac_charger_attached_work; |
291 | struct delayed_work usb_charger_attached_work; | |
34c11a70 | 292 | struct delayed_work vbus_drop_end_work; |
84edbeea AM |
293 | struct work_struct ac_work; |
294 | struct work_struct detect_usb_type_work; | |
295 | struct work_struct usb_link_status_work; | |
84edbeea AM |
296 | struct work_struct check_main_thermal_prot_work; |
297 | struct work_struct check_usb_thermal_prot_work; | |
efd71c89 | 298 | struct usb_phy *usb_phy; |
84edbeea | 299 | struct notifier_block nb; |
b269fff4 | 300 | struct mutex charger_attached_mutex; |
84edbeea AM |
301 | }; |
302 | ||
303 | /* AC properties */ | |
304 | static enum power_supply_property ab8500_charger_ac_props[] = { | |
305 | POWER_SUPPLY_PROP_HEALTH, | |
306 | POWER_SUPPLY_PROP_PRESENT, | |
307 | POWER_SUPPLY_PROP_ONLINE, | |
308 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
309 | POWER_SUPPLY_PROP_VOLTAGE_AVG, | |
310 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
311 | }; | |
312 | ||
313 | /* USB properties */ | |
314 | static enum power_supply_property ab8500_charger_usb_props[] = { | |
315 | POWER_SUPPLY_PROP_HEALTH, | |
316 | POWER_SUPPLY_PROP_CURRENT_AVG, | |
317 | POWER_SUPPLY_PROP_PRESENT, | |
318 | POWER_SUPPLY_PROP_ONLINE, | |
319 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
320 | POWER_SUPPLY_PROP_VOLTAGE_AVG, | |
321 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
322 | }; | |
323 | ||
defbfa9c POH |
324 | /* |
325 | * Function for enabling and disabling sw fallback mode | |
326 | * should always be disabled when no charger is connected. | |
84edbeea | 327 | */ |
defbfa9c POH |
328 | static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di, |
329 | bool fallback) | |
84edbeea | 330 | { |
b0163222 | 331 | u8 val; |
84edbeea | 332 | u8 reg; |
b0163222 NG |
333 | u8 bank; |
334 | u8 bit; | |
84edbeea AM |
335 | int ret; |
336 | ||
defbfa9c | 337 | dev_dbg(di->dev, "SW Fallback: %d\n", fallback); |
84edbeea | 338 | |
b0163222 NG |
339 | if (is_ab8500(di->parent)) { |
340 | bank = 0x15; | |
341 | reg = 0x0; | |
342 | bit = 3; | |
343 | } else { | |
344 | bank = AB8500_SYS_CTRL1_BLOCK; | |
345 | reg = AB8500_SW_CONTROL_FALLBACK; | |
346 | bit = 0; | |
347 | } | |
348 | ||
defbfa9c | 349 | /* read the register containing fallback bit */ |
b0163222 NG |
350 | ret = abx500_get_register_interruptible(di->dev, bank, reg, &val); |
351 | if (ret < 0) { | |
352 | dev_err(di->dev, "%d read failed\n", __LINE__); | |
84edbeea AM |
353 | return; |
354 | } | |
355 | ||
b0163222 NG |
356 | if (is_ab8500(di->parent)) { |
357 | /* enable the OPT emulation registers */ | |
358 | ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2); | |
359 | if (ret) { | |
360 | dev_err(di->dev, "%d write failed\n", __LINE__); | |
361 | goto disable_otp; | |
362 | } | |
84edbeea AM |
363 | } |
364 | ||
defbfa9c | 365 | if (fallback) |
b0163222 | 366 | val |= (1 << bit); |
84edbeea | 367 | else |
b0163222 | 368 | val &= ~(1 << bit); |
84edbeea | 369 | |
defbfa9c | 370 | /* write back the changed fallback bit value to register */ |
b0163222 | 371 | ret = abx500_set_register_interruptible(di->dev, bank, reg, val); |
84edbeea AM |
372 | if (ret) { |
373 | dev_err(di->dev, "%d write failed\n", __LINE__); | |
84edbeea AM |
374 | } |
375 | ||
b0163222 NG |
376 | disable_otp: |
377 | if (is_ab8500(di->parent)) { | |
378 | /* disable the set OTP registers again */ | |
379 | ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0); | |
380 | if (ret) { | |
381 | dev_err(di->dev, "%d write failed\n", __LINE__); | |
382 | } | |
84edbeea AM |
383 | } |
384 | } | |
385 | ||
386 | /** | |
387 | * ab8500_power_supply_changed - a wrapper with local extentions for | |
388 | * power_supply_changed | |
389 | * @di: pointer to the ab8500_charger structure | |
390 | * @psy: pointer to power_supply_that have changed. | |
391 | * | |
392 | */ | |
393 | static void ab8500_power_supply_changed(struct ab8500_charger *di, | |
394 | struct power_supply *psy) | |
395 | { | |
4aef72db | 396 | if (di->autopower_cfg) { |
84edbeea AM |
397 | if (!di->usb.charger_connected && |
398 | !di->ac.charger_connected && | |
399 | di->autopower) { | |
400 | di->autopower = false; | |
defbfa9c | 401 | ab8500_enable_disable_sw_fallback(di, false); |
84edbeea AM |
402 | } else if (!di->autopower && |
403 | (di->ac.charger_connected || | |
404 | di->usb.charger_connected)) { | |
405 | di->autopower = true; | |
defbfa9c | 406 | ab8500_enable_disable_sw_fallback(di, true); |
84edbeea AM |
407 | } |
408 | } | |
409 | power_supply_changed(psy); | |
410 | } | |
411 | ||
412 | static void ab8500_charger_set_usb_connected(struct ab8500_charger *di, | |
413 | bool connected) | |
414 | { | |
415 | if (connected != di->usb.charger_connected) { | |
416 | dev_dbg(di->dev, "USB connected:%i\n", connected); | |
417 | di->usb.charger_connected = connected; | |
418 | sysfs_notify(&di->usb_chg.psy.dev->kobj, NULL, "present"); | |
b269fff4 LJ |
419 | |
420 | if (connected) { | |
421 | mutex_lock(&di->charger_attached_mutex); | |
422 | mutex_unlock(&di->charger_attached_mutex); | |
423 | ||
424 | queue_delayed_work(di->charger_wq, | |
425 | &di->usb_charger_attached_work, | |
426 | HZ); | |
427 | } else { | |
428 | cancel_delayed_work_sync(&di->usb_charger_attached_work); | |
429 | mutex_lock(&di->charger_attached_mutex); | |
430 | mutex_unlock(&di->charger_attached_mutex); | |
431 | } | |
84edbeea AM |
432 | } |
433 | } | |
434 | ||
435 | /** | |
436 | * ab8500_charger_get_ac_voltage() - get ac charger voltage | |
437 | * @di: pointer to the ab8500_charger structure | |
438 | * | |
439 | * Returns ac charger voltage (on success) | |
440 | */ | |
441 | static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di) | |
442 | { | |
443 | int vch; | |
444 | ||
445 | /* Only measure voltage if the charger is connected */ | |
446 | if (di->ac.charger_connected) { | |
447 | vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V); | |
448 | if (vch < 0) | |
449 | dev_err(di->dev, "%s gpadc conv failed,\n", __func__); | |
450 | } else { | |
451 | vch = 0; | |
452 | } | |
453 | return vch; | |
454 | } | |
455 | ||
456 | /** | |
457 | * ab8500_charger_ac_cv() - check if the main charger is in CV mode | |
458 | * @di: pointer to the ab8500_charger structure | |
459 | * | |
460 | * Returns ac charger CV mode (on success) else error code | |
461 | */ | |
462 | static int ab8500_charger_ac_cv(struct ab8500_charger *di) | |
463 | { | |
464 | u8 val; | |
465 | int ret = 0; | |
466 | ||
467 | /* Only check CV mode if the charger is online */ | |
468 | if (di->ac.charger_online) { | |
469 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
470 | AB8500_CH_STATUS1_REG, &val); | |
471 | if (ret < 0) { | |
472 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
473 | return 0; | |
474 | } | |
475 | ||
476 | if (val & MAIN_CH_CV_ON) | |
477 | ret = 1; | |
478 | else | |
479 | ret = 0; | |
480 | } | |
481 | ||
482 | return ret; | |
483 | } | |
484 | ||
485 | /** | |
486 | * ab8500_charger_get_vbus_voltage() - get vbus voltage | |
487 | * @di: pointer to the ab8500_charger structure | |
488 | * | |
489 | * This function returns the vbus voltage. | |
490 | * Returns vbus voltage (on success) | |
491 | */ | |
492 | static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di) | |
493 | { | |
494 | int vch; | |
495 | ||
496 | /* Only measure voltage if the charger is connected */ | |
497 | if (di->usb.charger_connected) { | |
498 | vch = ab8500_gpadc_convert(di->gpadc, VBUS_V); | |
499 | if (vch < 0) | |
500 | dev_err(di->dev, "%s gpadc conv failed\n", __func__); | |
501 | } else { | |
502 | vch = 0; | |
503 | } | |
504 | return vch; | |
505 | } | |
506 | ||
507 | /** | |
508 | * ab8500_charger_get_usb_current() - get usb charger current | |
509 | * @di: pointer to the ab8500_charger structure | |
510 | * | |
511 | * This function returns the usb charger current. | |
512 | * Returns usb current (on success) and error code on failure | |
513 | */ | |
514 | static int ab8500_charger_get_usb_current(struct ab8500_charger *di) | |
515 | { | |
516 | int ich; | |
517 | ||
518 | /* Only measure current if the charger is online */ | |
519 | if (di->usb.charger_online) { | |
520 | ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C); | |
521 | if (ich < 0) | |
522 | dev_err(di->dev, "%s gpadc conv failed\n", __func__); | |
523 | } else { | |
524 | ich = 0; | |
525 | } | |
526 | return ich; | |
527 | } | |
528 | ||
529 | /** | |
530 | * ab8500_charger_get_ac_current() - get ac charger current | |
531 | * @di: pointer to the ab8500_charger structure | |
532 | * | |
533 | * This function returns the ac charger current. | |
534 | * Returns ac current (on success) and error code on failure. | |
535 | */ | |
536 | static int ab8500_charger_get_ac_current(struct ab8500_charger *di) | |
537 | { | |
538 | int ich; | |
539 | ||
540 | /* Only measure current if the charger is online */ | |
541 | if (di->ac.charger_online) { | |
542 | ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C); | |
543 | if (ich < 0) | |
544 | dev_err(di->dev, "%s gpadc conv failed\n", __func__); | |
545 | } else { | |
546 | ich = 0; | |
547 | } | |
548 | return ich; | |
549 | } | |
550 | ||
551 | /** | |
552 | * ab8500_charger_usb_cv() - check if the usb charger is in CV mode | |
553 | * @di: pointer to the ab8500_charger structure | |
554 | * | |
555 | * Returns ac charger CV mode (on success) else error code | |
556 | */ | |
557 | static int ab8500_charger_usb_cv(struct ab8500_charger *di) | |
558 | { | |
559 | int ret; | |
560 | u8 val; | |
561 | ||
562 | /* Only check CV mode if the charger is online */ | |
563 | if (di->usb.charger_online) { | |
564 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
565 | AB8500_CH_USBCH_STAT1_REG, &val); | |
566 | if (ret < 0) { | |
567 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
568 | return 0; | |
569 | } | |
570 | ||
571 | if (val & USB_CH_CV_ON) | |
572 | ret = 1; | |
573 | else | |
574 | ret = 0; | |
575 | } else { | |
576 | ret = 0; | |
577 | } | |
578 | ||
579 | return ret; | |
580 | } | |
581 | ||
582 | /** | |
583 | * ab8500_charger_detect_chargers() - Detect the connected chargers | |
584 | * @di: pointer to the ab8500_charger structure | |
34c11a70 | 585 | * @probe: if probe, don't delay and wait for HW |
84edbeea AM |
586 | * |
587 | * Returns the type of charger connected. | |
588 | * For USB it will not mean we can actually charge from it | |
589 | * but that there is a USB cable connected that we have to | |
590 | * identify. This is used during startup when we don't get | |
591 | * interrupts of the charger detection | |
592 | * | |
593 | * Returns an integer value, that means, | |
594 | * NO_PW_CONN no power supply is connected | |
595 | * AC_PW_CONN if the AC power supply is connected | |
596 | * USB_PW_CONN if the USB power supply is connected | |
597 | * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected | |
598 | */ | |
34c11a70 | 599 | static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe) |
84edbeea AM |
600 | { |
601 | int result = NO_PW_CONN; | |
602 | int ret; | |
603 | u8 val; | |
604 | ||
605 | /* Check for AC charger */ | |
606 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
607 | AB8500_CH_STATUS1_REG, &val); | |
608 | if (ret < 0) { | |
609 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
610 | return ret; | |
611 | } | |
612 | ||
613 | if (val & MAIN_CH_DET) | |
614 | result = AC_PW_CONN; | |
615 | ||
616 | /* Check for USB charger */ | |
34c11a70 POH |
617 | |
618 | if (!probe) { | |
619 | /* | |
620 | * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100 | |
621 | * when disconnecting ACA even though no | |
622 | * charger was connected. Try waiting a little | |
623 | * longer than the 100 ms of VBUS_DET_DBNC100... | |
624 | */ | |
625 | msleep(110); | |
626 | } | |
84edbeea AM |
627 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, |
628 | AB8500_CH_USBCH_STAT1_REG, &val); | |
629 | if (ret < 0) { | |
630 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
631 | return ret; | |
632 | } | |
34c11a70 POH |
633 | dev_dbg(di->dev, |
634 | "%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__, | |
635 | val); | |
84edbeea AM |
636 | if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100)) |
637 | result |= USB_PW_CONN; | |
638 | ||
639 | return result; | |
640 | } | |
641 | ||
642 | /** | |
643 | * ab8500_charger_max_usb_curr() - get the max curr for the USB type | |
644 | * @di: pointer to the ab8500_charger structure | |
645 | * @link_status: the identified USB type | |
646 | * | |
647 | * Get the maximum current that is allowed to be drawn from the host | |
648 | * based on the USB type. | |
649 | * Returns error code in case of failure else 0 on success | |
650 | */ | |
651 | static int ab8500_charger_max_usb_curr(struct ab8500_charger *di, | |
74a8e349 | 652 | enum ab8500_charger_link_status link_status) |
84edbeea AM |
653 | { |
654 | int ret = 0; | |
655 | ||
4b45f4a9 MC |
656 | di->usb_device_is_unrecognised = false; |
657 | ||
34c11a70 POH |
658 | /* |
659 | * Platform only supports USB 2.0. | |
660 | * This means that charging current from USB source | |
661 | * is maximum 500 mA. Every occurence of USB_STAT_*_HOST_* | |
662 | * should set USB_CH_IP_CUR_LVL_0P5. | |
663 | */ | |
664 | ||
84edbeea AM |
665 | switch (link_status) { |
666 | case USB_STAT_STD_HOST_NC: | |
667 | case USB_STAT_STD_HOST_C_NS: | |
668 | case USB_STAT_STD_HOST_C_S: | |
669 | dev_dbg(di->dev, "USB Type - Standard host is " | |
34c11a70 POH |
670 | "detected through USB driver\n"); |
671 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5; | |
672 | di->is_usb_host = true; | |
673 | di->is_aca_rid = 0; | |
84edbeea AM |
674 | break; |
675 | case USB_STAT_HOST_CHG_HS_CHIRP: | |
676 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5; | |
34c11a70 POH |
677 | di->is_usb_host = true; |
678 | di->is_aca_rid = 0; | |
84edbeea AM |
679 | break; |
680 | case USB_STAT_HOST_CHG_HS: | |
34c11a70 POH |
681 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5; |
682 | di->is_usb_host = true; | |
683 | di->is_aca_rid = 0; | |
684 | break; | |
84edbeea AM |
685 | case USB_STAT_ACA_RID_C_HS: |
686 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P9; | |
34c11a70 POH |
687 | di->is_usb_host = false; |
688 | di->is_aca_rid = 0; | |
84edbeea AM |
689 | break; |
690 | case USB_STAT_ACA_RID_A: | |
691 | /* | |
692 | * Dedicated charger level minus maximum current accessory | |
34c11a70 | 693 | * can consume (900mA). Closest level is 500mA |
84edbeea | 694 | */ |
34c11a70 POH |
695 | dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n"); |
696 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5; | |
697 | di->is_usb_host = false; | |
698 | di->is_aca_rid = 1; | |
84edbeea AM |
699 | break; |
700 | case USB_STAT_ACA_RID_B: | |
701 | /* | |
702 | * Dedicated charger level minus 120mA (20mA for ACA and | |
703 | * 100mA for potential accessory). Closest level is 1300mA | |
704 | */ | |
705 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P3; | |
74a8e349 HB |
706 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, |
707 | di->max_usb_in_curr); | |
34c11a70 POH |
708 | di->is_usb_host = false; |
709 | di->is_aca_rid = 1; | |
84edbeea | 710 | break; |
84edbeea | 711 | case USB_STAT_HOST_CHG_NM: |
34c11a70 POH |
712 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5; |
713 | di->is_usb_host = true; | |
714 | di->is_aca_rid = 0; | |
715 | break; | |
74a8e349 | 716 | case USB_STAT_DEDICATED_CHG: |
34c11a70 POH |
717 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5; |
718 | di->is_usb_host = false; | |
719 | di->is_aca_rid = 0; | |
720 | break; | |
74a8e349 | 721 | case USB_STAT_ACA_RID_C_HS_CHIRP: |
34c11a70 | 722 | case USB_STAT_ACA_RID_C_NM: |
84edbeea | 723 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5; |
34c11a70 POH |
724 | di->is_usb_host = false; |
725 | di->is_aca_rid = 1; | |
84edbeea | 726 | break; |
4b45f4a9 MC |
727 | case USB_STAT_NOT_CONFIGURED: |
728 | if (di->vbus_detected) { | |
729 | di->usb_device_is_unrecognised = true; | |
730 | dev_dbg(di->dev, "USB Type - Legacy charger.\n"); | |
731 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5; | |
732 | break; | |
733 | } | |
84edbeea | 734 | case USB_STAT_HM_IDGND: |
84edbeea AM |
735 | dev_err(di->dev, "USB Type - Charging not allowed\n"); |
736 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05; | |
737 | ret = -ENXIO; | |
738 | break; | |
74a8e349 HB |
739 | case USB_STAT_RESERVED: |
740 | if (is_ab8500(di->parent)) { | |
741 | di->flags.vbus_collapse = true; | |
742 | dev_err(di->dev, "USB Type - USB_STAT_RESERVED " | |
743 | "VBUS has collapsed\n"); | |
744 | ret = -ENXIO; | |
745 | break; | |
746 | } | |
747 | if (is_ab9540(di->parent) || is_ab8505(di->parent)) { | |
748 | dev_dbg(di->dev, "USB Type - Charging not allowed\n"); | |
749 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05; | |
750 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", | |
751 | link_status, di->max_usb_in_curr); | |
752 | ret = -ENXIO; | |
753 | break; | |
754 | } | |
755 | break; | |
756 | case USB_STAT_CARKIT_1: | |
757 | case USB_STAT_CARKIT_2: | |
758 | case USB_STAT_ACA_DOCK_CHARGER: | |
759 | case USB_STAT_CHARGER_LINE_1: | |
760 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5; | |
761 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, | |
762 | di->max_usb_in_curr); | |
ff38090a HS |
763 | case USB_STAT_NOT_VALID_LINK: |
764 | dev_err(di->dev, "USB Type invalid - try charging anyway\n"); | |
765 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5; | |
74a8e349 HB |
766 | break; |
767 | ||
84edbeea AM |
768 | default: |
769 | dev_err(di->dev, "USB Type - Unknown\n"); | |
770 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05; | |
771 | ret = -ENXIO; | |
772 | break; | |
773 | }; | |
774 | ||
775 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", | |
776 | link_status, di->max_usb_in_curr); | |
777 | ||
778 | return ret; | |
779 | } | |
780 | ||
781 | /** | |
782 | * ab8500_charger_read_usb_type() - read the type of usb connected | |
783 | * @di: pointer to the ab8500_charger structure | |
784 | * | |
785 | * Detect the type of the plugged USB | |
786 | * Returns error code in case of failure else 0 on success | |
787 | */ | |
788 | static int ab8500_charger_read_usb_type(struct ab8500_charger *di) | |
789 | { | |
790 | int ret; | |
791 | u8 val; | |
792 | ||
793 | ret = abx500_get_register_interruptible(di->dev, | |
794 | AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val); | |
795 | if (ret < 0) { | |
796 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
797 | return ret; | |
798 | } | |
74a8e349 HB |
799 | if (is_ab8500(di->parent)) { |
800 | ret = abx500_get_register_interruptible(di->dev, AB8500_USB, | |
801 | AB8500_USB_LINE_STAT_REG, &val); | |
802 | } else { | |
803 | if (is_ab9540(di->parent) || is_ab8505(di->parent)) | |
804 | ret = abx500_get_register_interruptible(di->dev, | |
805 | AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val); | |
806 | } | |
84edbeea AM |
807 | if (ret < 0) { |
808 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
809 | return ret; | |
810 | } | |
811 | ||
812 | /* get the USB type */ | |
813 | val = (val & AB8500_USB_LINK_STATUS) >> 3; | |
814 | ret = ab8500_charger_max_usb_curr(di, | |
815 | (enum ab8500_charger_link_status) val); | |
816 | ||
817 | return ret; | |
818 | } | |
819 | ||
820 | /** | |
821 | * ab8500_charger_detect_usb_type() - get the type of usb connected | |
822 | * @di: pointer to the ab8500_charger structure | |
823 | * | |
824 | * Detect the type of the plugged USB | |
825 | * Returns error code in case of failure else 0 on success | |
826 | */ | |
827 | static int ab8500_charger_detect_usb_type(struct ab8500_charger *di) | |
828 | { | |
829 | int i, ret; | |
830 | u8 val; | |
831 | ||
832 | /* | |
833 | * On getting the VBUS rising edge detect interrupt there | |
834 | * is a 250ms delay after which the register UsbLineStatus | |
835 | * is filled with valid data. | |
836 | */ | |
837 | for (i = 0; i < 10; i++) { | |
838 | msleep(250); | |
839 | ret = abx500_get_register_interruptible(di->dev, | |
840 | AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, | |
841 | &val); | |
34c11a70 POH |
842 | dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n", |
843 | __func__, val); | |
84edbeea AM |
844 | if (ret < 0) { |
845 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
846 | return ret; | |
847 | } | |
74a8e349 HB |
848 | |
849 | if (is_ab8500(di->parent)) | |
850 | ret = abx500_get_register_interruptible(di->dev, | |
851 | AB8500_USB, AB8500_USB_LINE_STAT_REG, &val); | |
852 | else | |
853 | ret = abx500_get_register_interruptible(di->dev, | |
854 | AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val); | |
84edbeea AM |
855 | if (ret < 0) { |
856 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
857 | return ret; | |
858 | } | |
34c11a70 POH |
859 | dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__, |
860 | val); | |
84edbeea AM |
861 | /* |
862 | * Until the IT source register is read the UsbLineStatus | |
863 | * register is not updated, hence doing the same | |
864 | * Revisit this: | |
865 | */ | |
866 | ||
867 | /* get the USB type */ | |
868 | val = (val & AB8500_USB_LINK_STATUS) >> 3; | |
869 | if (val) | |
870 | break; | |
871 | } | |
872 | ret = ab8500_charger_max_usb_curr(di, | |
873 | (enum ab8500_charger_link_status) val); | |
874 | ||
875 | return ret; | |
876 | } | |
877 | ||
878 | /* | |
879 | * This array maps the raw hex value to charger voltage used by the AB8500 | |
880 | * Values taken from the UM0836 | |
881 | */ | |
882 | static int ab8500_charger_voltage_map[] = { | |
883 | 3500 , | |
884 | 3525 , | |
885 | 3550 , | |
886 | 3575 , | |
887 | 3600 , | |
888 | 3625 , | |
889 | 3650 , | |
890 | 3675 , | |
891 | 3700 , | |
892 | 3725 , | |
893 | 3750 , | |
894 | 3775 , | |
895 | 3800 , | |
896 | 3825 , | |
897 | 3850 , | |
898 | 3875 , | |
899 | 3900 , | |
900 | 3925 , | |
901 | 3950 , | |
902 | 3975 , | |
903 | 4000 , | |
904 | 4025 , | |
905 | 4050 , | |
906 | 4060 , | |
907 | 4070 , | |
908 | 4080 , | |
909 | 4090 , | |
910 | 4100 , | |
911 | 4110 , | |
912 | 4120 , | |
913 | 4130 , | |
914 | 4140 , | |
915 | 4150 , | |
916 | 4160 , | |
917 | 4170 , | |
918 | 4180 , | |
919 | 4190 , | |
920 | 4200 , | |
921 | 4210 , | |
922 | 4220 , | |
923 | 4230 , | |
924 | 4240 , | |
925 | 4250 , | |
926 | 4260 , | |
927 | 4270 , | |
928 | 4280 , | |
929 | 4290 , | |
930 | 4300 , | |
931 | 4310 , | |
932 | 4320 , | |
933 | 4330 , | |
934 | 4340 , | |
935 | 4350 , | |
936 | 4360 , | |
937 | 4370 , | |
938 | 4380 , | |
939 | 4390 , | |
940 | 4400 , | |
941 | 4410 , | |
942 | 4420 , | |
943 | 4430 , | |
944 | 4440 , | |
945 | 4450 , | |
946 | 4460 , | |
947 | 4470 , | |
948 | 4480 , | |
949 | 4490 , | |
950 | 4500 , | |
951 | 4510 , | |
952 | 4520 , | |
953 | 4530 , | |
954 | 4540 , | |
955 | 4550 , | |
956 | 4560 , | |
957 | 4570 , | |
958 | 4580 , | |
959 | 4590 , | |
960 | 4600 , | |
961 | }; | |
962 | ||
963 | /* | |
964 | * This array maps the raw hex value to charger current used by the AB8500 | |
965 | * Values taken from the UM0836 | |
966 | */ | |
967 | static int ab8500_charger_current_map[] = { | |
968 | 100 , | |
969 | 200 , | |
970 | 300 , | |
971 | 400 , | |
972 | 500 , | |
973 | 600 , | |
974 | 700 , | |
975 | 800 , | |
976 | 900 , | |
977 | 1000 , | |
978 | 1100 , | |
979 | 1200 , | |
980 | 1300 , | |
981 | 1400 , | |
982 | 1500 , | |
983 | }; | |
984 | ||
985 | /* | |
986 | * This array maps the raw hex value to VBUS input current used by the AB8500 | |
987 | * Values taken from the UM0836 | |
988 | */ | |
989 | static int ab8500_charger_vbus_in_curr_map[] = { | |
990 | USB_CH_IP_CUR_LVL_0P05, | |
991 | USB_CH_IP_CUR_LVL_0P09, | |
992 | USB_CH_IP_CUR_LVL_0P19, | |
993 | USB_CH_IP_CUR_LVL_0P29, | |
994 | USB_CH_IP_CUR_LVL_0P38, | |
995 | USB_CH_IP_CUR_LVL_0P45, | |
996 | USB_CH_IP_CUR_LVL_0P5, | |
997 | USB_CH_IP_CUR_LVL_0P6, | |
998 | USB_CH_IP_CUR_LVL_0P7, | |
999 | USB_CH_IP_CUR_LVL_0P8, | |
1000 | USB_CH_IP_CUR_LVL_0P9, | |
1001 | USB_CH_IP_CUR_LVL_1P0, | |
1002 | USB_CH_IP_CUR_LVL_1P1, | |
1003 | USB_CH_IP_CUR_LVL_1P3, | |
1004 | USB_CH_IP_CUR_LVL_1P4, | |
1005 | USB_CH_IP_CUR_LVL_1P5, | |
1006 | }; | |
1007 | ||
1008 | static int ab8500_voltage_to_regval(int voltage) | |
1009 | { | |
1010 | int i; | |
1011 | ||
1012 | /* Special case for voltage below 3.5V */ | |
1013 | if (voltage < ab8500_charger_voltage_map[0]) | |
1014 | return LOW_VOLT_REG; | |
1015 | ||
1016 | for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) { | |
1017 | if (voltage < ab8500_charger_voltage_map[i]) | |
1018 | return i - 1; | |
1019 | } | |
1020 | ||
1021 | /* If not last element, return error */ | |
1022 | i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1; | |
1023 | if (voltage == ab8500_charger_voltage_map[i]) | |
1024 | return i; | |
1025 | else | |
1026 | return -1; | |
1027 | } | |
1028 | ||
1029 | static int ab8500_current_to_regval(int curr) | |
1030 | { | |
1031 | int i; | |
1032 | ||
1033 | if (curr < ab8500_charger_current_map[0]) | |
1034 | return 0; | |
1035 | ||
1036 | for (i = 0; i < ARRAY_SIZE(ab8500_charger_current_map); i++) { | |
1037 | if (curr < ab8500_charger_current_map[i]) | |
1038 | return i - 1; | |
1039 | } | |
1040 | ||
1041 | /* If not last element, return error */ | |
1042 | i = ARRAY_SIZE(ab8500_charger_current_map) - 1; | |
1043 | if (curr == ab8500_charger_current_map[i]) | |
1044 | return i; | |
1045 | else | |
1046 | return -1; | |
1047 | } | |
1048 | ||
1049 | static int ab8500_vbus_in_curr_to_regval(int curr) | |
1050 | { | |
1051 | int i; | |
1052 | ||
1053 | if (curr < ab8500_charger_vbus_in_curr_map[0]) | |
1054 | return 0; | |
1055 | ||
1056 | for (i = 0; i < ARRAY_SIZE(ab8500_charger_vbus_in_curr_map); i++) { | |
1057 | if (curr < ab8500_charger_vbus_in_curr_map[i]) | |
1058 | return i - 1; | |
1059 | } | |
1060 | ||
1061 | /* If not last element, return error */ | |
1062 | i = ARRAY_SIZE(ab8500_charger_vbus_in_curr_map) - 1; | |
1063 | if (curr == ab8500_charger_vbus_in_curr_map[i]) | |
1064 | return i; | |
1065 | else | |
1066 | return -1; | |
1067 | } | |
1068 | ||
1069 | /** | |
1070 | * ab8500_charger_get_usb_cur() - get usb current | |
1071 | * @di: pointer to the ab8500_charger structre | |
1072 | * | |
1073 | * The usb stack provides the maximum current that can be drawn from | |
1074 | * the standard usb host. This will be in mA. | |
1075 | * This function converts current in mA to a value that can be written | |
1076 | * to the register. Returns -1 if charging is not allowed | |
1077 | */ | |
1078 | static int ab8500_charger_get_usb_cur(struct ab8500_charger *di) | |
1079 | { | |
1080 | switch (di->usb_state.usb_current) { | |
1081 | case 100: | |
1082 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P09; | |
1083 | break; | |
1084 | case 200: | |
1085 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P19; | |
1086 | break; | |
1087 | case 300: | |
1088 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P29; | |
1089 | break; | |
1090 | case 400: | |
1091 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P38; | |
1092 | break; | |
1093 | case 500: | |
1094 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5; | |
1095 | break; | |
1096 | default: | |
1097 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05; | |
1098 | return -1; | |
1099 | break; | |
1100 | }; | |
1101 | return 0; | |
1102 | } | |
1103 | ||
f8e96dff JB |
1104 | /** |
1105 | * ab8500_charger_set_current() - set charger current | |
1106 | * @di: pointer to the ab8500_charger structure | |
1107 | * @ich: charger current, in mA | |
1108 | * @reg: select what charger register to set | |
1109 | * | |
1110 | * Set charger current. | |
1111 | * There is no state machine in the AB to step up/down the charger | |
1112 | * current to avoid dips and spikes on MAIN, VBUS and VBAT when | |
1113 | * charging is started. Instead we need to implement | |
1114 | * this charger current step-up/down here. | |
1115 | * Returns error code in case of failure else 0(on success) | |
1116 | */ | |
1117 | static int ab8500_charger_set_current(struct ab8500_charger *di, | |
1118 | int ich, int reg) | |
1119 | { | |
34c11a70 POH |
1120 | int ret = 0; |
1121 | int auto_curr_index, curr_index, prev_curr_index, shift_value, i; | |
f8e96dff | 1122 | u8 reg_value; |
34c11a70 POH |
1123 | u32 step_udelay; |
1124 | bool no_stepping = false; | |
1125 | ||
1126 | atomic_inc(&di->current_stepping_sessions); | |
1127 | ||
1128 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
1129 | reg, ®_value); | |
1130 | if (ret < 0) { | |
1131 | dev_err(di->dev, "%s read failed\n", __func__); | |
1132 | goto exit_set_current; | |
1133 | } | |
f8e96dff JB |
1134 | |
1135 | switch (reg) { | |
1136 | case AB8500_MCH_IPT_CURLVL_REG: | |
1137 | shift_value = MAIN_CH_INPUT_CURR_SHIFT; | |
34c11a70 | 1138 | prev_curr_index = (reg_value >> shift_value); |
f8e96dff | 1139 | curr_index = ab8500_current_to_regval(ich); |
34c11a70 POH |
1140 | step_udelay = STEP_UDELAY; |
1141 | if (!di->ac.charger_connected) | |
1142 | no_stepping = true; | |
f8e96dff JB |
1143 | break; |
1144 | case AB8500_USBCH_IPT_CRNTLVL_REG: | |
1145 | shift_value = VBUS_IN_CURR_LIM_SHIFT; | |
34c11a70 | 1146 | prev_curr_index = (reg_value >> shift_value); |
f8e96dff | 1147 | curr_index = ab8500_vbus_in_curr_to_regval(ich); |
34c11a70 POH |
1148 | step_udelay = STEP_UDELAY * 100; |
1149 | ||
1150 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
1151 | AB8500_CH_USBCH_STAT2_REG, ®_value); | |
1152 | if (ret < 0) { | |
1153 | dev_err(di->dev, "%s read failed\n", __func__); | |
1154 | goto exit_set_current; | |
1155 | } | |
1156 | auto_curr_index = | |
1157 | reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT; | |
1158 | ||
1159 | dev_dbg(di->dev, "%s Auto VBUS curr is %d mA\n", | |
1160 | __func__, | |
1161 | ab8500_charger_vbus_in_curr_map[auto_curr_index]); | |
1162 | ||
1163 | prev_curr_index = min(prev_curr_index, auto_curr_index); | |
1164 | ||
1165 | if (!di->usb.charger_connected) | |
1166 | no_stepping = true; | |
f8e96dff JB |
1167 | break; |
1168 | case AB8500_CH_OPT_CRNTLVL_REG: | |
1169 | shift_value = 0; | |
34c11a70 | 1170 | prev_curr_index = (reg_value >> shift_value); |
f8e96dff | 1171 | curr_index = ab8500_current_to_regval(ich); |
34c11a70 POH |
1172 | step_udelay = STEP_UDELAY; |
1173 | if (curr_index && (curr_index - prev_curr_index) > 1) | |
1174 | step_udelay *= 100; | |
1175 | ||
1176 | if (!di->usb.charger_connected && !di->ac.charger_connected) | |
1177 | no_stepping = true; | |
1178 | ||
f8e96dff JB |
1179 | break; |
1180 | default: | |
1181 | dev_err(di->dev, "%s current register not valid\n", __func__); | |
34c11a70 POH |
1182 | ret = -ENXIO; |
1183 | goto exit_set_current; | |
f8e96dff JB |
1184 | } |
1185 | ||
1186 | if (curr_index < 0) { | |
1187 | dev_err(di->dev, "requested current limit out-of-range\n"); | |
34c11a70 POH |
1188 | ret = -ENXIO; |
1189 | goto exit_set_current; | |
f8e96dff | 1190 | } |
f8e96dff JB |
1191 | |
1192 | /* only update current if it's been changed */ | |
34c11a70 POH |
1193 | if (prev_curr_index == curr_index) { |
1194 | dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n", | |
1195 | __func__, reg); | |
1196 | ret = 0; | |
1197 | goto exit_set_current; | |
1198 | } | |
f8e96dff JB |
1199 | |
1200 | dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n", | |
1201 | __func__, ich, reg); | |
1202 | ||
34c11a70 POH |
1203 | if (no_stepping) { |
1204 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1205 | reg, (u8)curr_index << shift_value); | |
1206 | if (ret) | |
1207 | dev_err(di->dev, "%s write failed\n", __func__); | |
1208 | } else if (prev_curr_index > curr_index) { | |
f8e96dff | 1209 | for (i = prev_curr_index - 1; i >= curr_index; i--) { |
34c11a70 POH |
1210 | dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n", |
1211 | (u8) i << shift_value, reg); | |
f8e96dff | 1212 | ret = abx500_set_register_interruptible(di->dev, |
34c11a70 | 1213 | AB8500_CHARGER, reg, (u8)i << shift_value); |
f8e96dff JB |
1214 | if (ret) { |
1215 | dev_err(di->dev, "%s write failed\n", __func__); | |
34c11a70 | 1216 | goto exit_set_current; |
f8e96dff | 1217 | } |
34c11a70 POH |
1218 | if (i != curr_index) |
1219 | usleep_range(step_udelay, step_udelay * 2); | |
f8e96dff JB |
1220 | } |
1221 | } else { | |
1222 | for (i = prev_curr_index + 1; i <= curr_index; i++) { | |
34c11a70 POH |
1223 | dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n", |
1224 | (u8)i << shift_value, reg); | |
f8e96dff | 1225 | ret = abx500_set_register_interruptible(di->dev, |
34c11a70 | 1226 | AB8500_CHARGER, reg, (u8)i << shift_value); |
f8e96dff JB |
1227 | if (ret) { |
1228 | dev_err(di->dev, "%s write failed\n", __func__); | |
34c11a70 | 1229 | goto exit_set_current; |
f8e96dff | 1230 | } |
34c11a70 POH |
1231 | if (i != curr_index) |
1232 | usleep_range(step_udelay, step_udelay * 2); | |
f8e96dff JB |
1233 | } |
1234 | } | |
34c11a70 POH |
1235 | |
1236 | exit_set_current: | |
1237 | atomic_dec(&di->current_stepping_sessions); | |
1238 | ||
f8e96dff JB |
1239 | return ret; |
1240 | } | |
1241 | ||
84edbeea AM |
1242 | /** |
1243 | * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit | |
1244 | * @di: pointer to the ab8500_charger structure | |
1245 | * @ich_in: charger input current limit | |
1246 | * | |
1247 | * Sets the current that can be drawn from the USB host | |
1248 | * Returns error code in case of failure else 0(on success) | |
1249 | */ | |
1250 | static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di, | |
1251 | int ich_in) | |
1252 | { | |
84edbeea | 1253 | int min_value; |
34c11a70 | 1254 | int ret; |
84edbeea AM |
1255 | |
1256 | /* We should always use to lowest current limit */ | |
b0284de0 | 1257 | min_value = min(di->bm->chg_params->usb_curr_max, ich_in); |
84edbeea AM |
1258 | |
1259 | switch (min_value) { | |
1260 | case 100: | |
1261 | if (di->vbat < VBAT_TRESH_IP_CUR_RED) | |
1262 | min_value = USB_CH_IP_CUR_LVL_0P05; | |
1263 | break; | |
1264 | case 500: | |
1265 | if (di->vbat < VBAT_TRESH_IP_CUR_RED) | |
1266 | min_value = USB_CH_IP_CUR_LVL_0P45; | |
1267 | break; | |
1268 | default: | |
1269 | break; | |
1270 | } | |
1271 | ||
34c11a70 POH |
1272 | dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value); |
1273 | ||
1274 | mutex_lock(&di->usb_ipt_crnt_lock); | |
1275 | ret = ab8500_charger_set_current(di, min_value, | |
f8e96dff | 1276 | AB8500_USBCH_IPT_CRNTLVL_REG); |
34c11a70 POH |
1277 | mutex_unlock(&di->usb_ipt_crnt_lock); |
1278 | ||
1279 | return ret; | |
f8e96dff | 1280 | } |
84edbeea | 1281 | |
f8e96dff JB |
1282 | /** |
1283 | * ab8500_charger_set_main_in_curr() - set main charger input current | |
1284 | * @di: pointer to the ab8500_charger structure | |
1285 | * @ich_in: input charger current, in mA | |
1286 | * | |
1287 | * Set main charger input current. | |
1288 | * Returns error code in case of failure else 0(on success) | |
1289 | */ | |
1290 | static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di, | |
1291 | int ich_in) | |
1292 | { | |
1293 | return ab8500_charger_set_current(di, ich_in, | |
1294 | AB8500_MCH_IPT_CURLVL_REG); | |
1295 | } | |
84edbeea | 1296 | |
f8e96dff JB |
1297 | /** |
1298 | * ab8500_charger_set_output_curr() - set charger output current | |
1299 | * @di: pointer to the ab8500_charger structure | |
1300 | * @ich_out: output charger current, in mA | |
1301 | * | |
1302 | * Set charger output current. | |
1303 | * Returns error code in case of failure else 0(on success) | |
1304 | */ | |
1305 | static int ab8500_charger_set_output_curr(struct ab8500_charger *di, | |
1306 | int ich_out) | |
1307 | { | |
1308 | return ab8500_charger_set_current(di, ich_out, | |
1309 | AB8500_CH_OPT_CRNTLVL_REG); | |
84edbeea AM |
1310 | } |
1311 | ||
1312 | /** | |
1313 | * ab8500_charger_led_en() - turn on/off chargign led | |
1314 | * @di: pointer to the ab8500_charger structure | |
1315 | * @on: flag to turn on/off the chargign led | |
1316 | * | |
1317 | * Power ON/OFF charging LED indication | |
1318 | * Returns error code in case of failure else 0(on success) | |
1319 | */ | |
1320 | static int ab8500_charger_led_en(struct ab8500_charger *di, int on) | |
1321 | { | |
1322 | int ret; | |
1323 | ||
1324 | if (on) { | |
1325 | /* Power ON charging LED indicator, set LED current to 5mA */ | |
1326 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1327 | AB8500_LED_INDICATOR_PWM_CTRL, | |
1328 | (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA)); | |
1329 | if (ret) { | |
1330 | dev_err(di->dev, "Power ON LED failed\n"); | |
1331 | return ret; | |
1332 | } | |
1333 | /* LED indicator PWM duty cycle 252/256 */ | |
1334 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1335 | AB8500_LED_INDICATOR_PWM_DUTY, | |
1336 | LED_INDICATOR_PWM_DUTY_252_256); | |
1337 | if (ret) { | |
1338 | dev_err(di->dev, "Set LED PWM duty cycle failed\n"); | |
1339 | return ret; | |
1340 | } | |
1341 | } else { | |
1342 | /* Power off charging LED indicator */ | |
1343 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1344 | AB8500_LED_INDICATOR_PWM_CTRL, | |
1345 | LED_INDICATOR_PWM_DIS); | |
1346 | if (ret) { | |
1347 | dev_err(di->dev, "Power-off LED failed\n"); | |
1348 | return ret; | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | return ret; | |
1353 | } | |
1354 | ||
1355 | /** | |
1356 | * ab8500_charger_ac_en() - enable or disable ac charging | |
1357 | * @di: pointer to the ab8500_charger structure | |
1358 | * @enable: enable/disable flag | |
1359 | * @vset: charging voltage | |
1360 | * @iset: charging current | |
1361 | * | |
1362 | * Enable/Disable AC/Mains charging and turns on/off the charging led | |
1363 | * respectively. | |
1364 | **/ | |
1365 | static int ab8500_charger_ac_en(struct ux500_charger *charger, | |
1366 | int enable, int vset, int iset) | |
1367 | { | |
1368 | int ret; | |
1369 | int volt_index; | |
1370 | int curr_index; | |
1371 | int input_curr_index; | |
1372 | u8 overshoot = 0; | |
1373 | ||
1374 | struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger); | |
1375 | ||
1376 | if (enable) { | |
1377 | /* Check if AC is connected */ | |
1378 | if (!di->ac.charger_connected) { | |
1379 | dev_err(di->dev, "AC charger not connected\n"); | |
1380 | return -ENXIO; | |
1381 | } | |
1382 | ||
1383 | /* Enable AC charging */ | |
1384 | dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset); | |
1385 | ||
1386 | /* | |
1387 | * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts | |
1388 | * will be triggered everytime we enable the VDD ADC supply. | |
1389 | * This will turn off charging for a short while. | |
1390 | * It can be avoided by having the supply on when | |
1391 | * there is a charger enabled. Normally the VDD ADC supply | |
1392 | * is enabled everytime a GPADC conversion is triggered. We will | |
1393 | * force it to be enabled from this driver to have | |
1394 | * the GPADC module independant of the AB8500 chargers | |
1395 | */ | |
1396 | if (!di->vddadc_en_ac) { | |
1397 | regulator_enable(di->regu); | |
1398 | di->vddadc_en_ac = true; | |
1399 | } | |
1400 | ||
1401 | /* Check if the requested voltage or current is valid */ | |
1402 | volt_index = ab8500_voltage_to_regval(vset); | |
1403 | curr_index = ab8500_current_to_regval(iset); | |
1404 | input_curr_index = ab8500_current_to_regval( | |
b0284de0 | 1405 | di->bm->chg_params->ac_curr_max); |
84edbeea AM |
1406 | if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) { |
1407 | dev_err(di->dev, | |
1408 | "Charger voltage or current too high, " | |
1409 | "charging not started\n"); | |
1410 | return -ENXIO; | |
1411 | } | |
1412 | ||
1413 | /* ChVoltLevel: maximum battery charging voltage */ | |
1414 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1415 | AB8500_CH_VOLT_LVL_REG, (u8) volt_index); | |
1416 | if (ret) { | |
1417 | dev_err(di->dev, "%s write failed\n", __func__); | |
1418 | return ret; | |
1419 | } | |
1420 | /* MainChInputCurr: current that can be drawn from the charger*/ | |
f8e96dff | 1421 | ret = ab8500_charger_set_main_in_curr(di, |
b0284de0 | 1422 | di->bm->chg_params->ac_curr_max); |
84edbeea | 1423 | if (ret) { |
f8e96dff JB |
1424 | dev_err(di->dev, "%s Failed to set MainChInputCurr\n", |
1425 | __func__); | |
84edbeea AM |
1426 | return ret; |
1427 | } | |
1428 | /* ChOutputCurentLevel: protected output current */ | |
f8e96dff | 1429 | ret = ab8500_charger_set_output_curr(di, iset); |
84edbeea | 1430 | if (ret) { |
f8e96dff JB |
1431 | dev_err(di->dev, "%s " |
1432 | "Failed to set ChOutputCurentLevel\n", | |
1433 | __func__); | |
84edbeea AM |
1434 | return ret; |
1435 | } | |
1436 | ||
1437 | /* Check if VBAT overshoot control should be enabled */ | |
b0284de0 | 1438 | if (!di->bm->enable_overshoot) |
84edbeea AM |
1439 | overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N; |
1440 | ||
1441 | /* Enable Main Charger */ | |
1442 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1443 | AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot); | |
1444 | if (ret) { | |
1445 | dev_err(di->dev, "%s write failed\n", __func__); | |
1446 | return ret; | |
1447 | } | |
1448 | ||
1449 | /* Power on charging LED indication */ | |
1450 | ret = ab8500_charger_led_en(di, true); | |
1451 | if (ret < 0) | |
1452 | dev_err(di->dev, "failed to enable LED\n"); | |
1453 | ||
1454 | di->ac.charger_online = 1; | |
1455 | } else { | |
1456 | /* Disable AC charging */ | |
1457 | if (is_ab8500_1p1_or_earlier(di->parent)) { | |
1458 | /* | |
1459 | * For ABB revision 1.0 and 1.1 there is a bug in the | |
1460 | * watchdog logic. That means we have to continously | |
1461 | * kick the charger watchdog even when no charger is | |
1462 | * connected. This is only valid once the AC charger | |
1463 | * has been enabled. This is a bug that is not handled | |
1464 | * by the algorithm and the watchdog have to be kicked | |
1465 | * by the charger driver when the AC charger | |
1466 | * is disabled | |
1467 | */ | |
1468 | if (di->ac_conn) { | |
1469 | queue_delayed_work(di->charger_wq, | |
1470 | &di->kick_wd_work, | |
1471 | round_jiffies(WD_KICK_INTERVAL)); | |
1472 | } | |
1473 | ||
1474 | /* | |
1475 | * We can't turn off charging completely | |
1476 | * due to a bug in AB8500 cut1. | |
1477 | * If we do, charging will not start again. | |
1478 | * That is why we set the lowest voltage | |
1479 | * and current possible | |
1480 | */ | |
1481 | ret = abx500_set_register_interruptible(di->dev, | |
1482 | AB8500_CHARGER, | |
1483 | AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5); | |
1484 | if (ret) { | |
1485 | dev_err(di->dev, | |
1486 | "%s write failed\n", __func__); | |
1487 | return ret; | |
1488 | } | |
1489 | ||
f8e96dff | 1490 | ret = ab8500_charger_set_output_curr(di, 0); |
84edbeea | 1491 | if (ret) { |
f8e96dff JB |
1492 | dev_err(di->dev, "%s " |
1493 | "Failed to set ChOutputCurentLevel\n", | |
1494 | __func__); | |
84edbeea AM |
1495 | return ret; |
1496 | } | |
1497 | } else { | |
1498 | ret = abx500_set_register_interruptible(di->dev, | |
1499 | AB8500_CHARGER, | |
1500 | AB8500_MCH_CTRL1, 0); | |
1501 | if (ret) { | |
1502 | dev_err(di->dev, | |
1503 | "%s write failed\n", __func__); | |
1504 | return ret; | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | ret = ab8500_charger_led_en(di, false); | |
1509 | if (ret < 0) | |
1510 | dev_err(di->dev, "failed to disable LED\n"); | |
1511 | ||
1512 | di->ac.charger_online = 0; | |
1513 | di->ac.wd_expired = false; | |
1514 | ||
1515 | /* Disable regulator if enabled */ | |
1516 | if (di->vddadc_en_ac) { | |
1517 | regulator_disable(di->regu); | |
1518 | di->vddadc_en_ac = false; | |
1519 | } | |
1520 | ||
1521 | dev_dbg(di->dev, "%s Disabled AC charging\n", __func__); | |
1522 | } | |
1523 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
1524 | ||
1525 | return ret; | |
1526 | } | |
1527 | ||
1528 | /** | |
1529 | * ab8500_charger_usb_en() - enable usb charging | |
1530 | * @di: pointer to the ab8500_charger structure | |
1531 | * @enable: enable/disable flag | |
1532 | * @vset: charging voltage | |
1533 | * @ich_out: charger output current | |
1534 | * | |
1535 | * Enable/Disable USB charging and turns on/off the charging led respectively. | |
1536 | * Returns error code in case of failure else 0(on success) | |
1537 | */ | |
1538 | static int ab8500_charger_usb_en(struct ux500_charger *charger, | |
1539 | int enable, int vset, int ich_out) | |
1540 | { | |
1541 | int ret; | |
1542 | int volt_index; | |
1543 | int curr_index; | |
1544 | u8 overshoot = 0; | |
1545 | ||
1546 | struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger); | |
1547 | ||
1548 | if (enable) { | |
1549 | /* Check if USB is connected */ | |
1550 | if (!di->usb.charger_connected) { | |
1551 | dev_err(di->dev, "USB charger not connected\n"); | |
1552 | return -ENXIO; | |
1553 | } | |
1554 | ||
1555 | /* | |
1556 | * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts | |
1557 | * will be triggered everytime we enable the VDD ADC supply. | |
1558 | * This will turn off charging for a short while. | |
1559 | * It can be avoided by having the supply on when | |
1560 | * there is a charger enabled. Normally the VDD ADC supply | |
1561 | * is enabled everytime a GPADC conversion is triggered. We will | |
1562 | * force it to be enabled from this driver to have | |
1563 | * the GPADC module independant of the AB8500 chargers | |
1564 | */ | |
1565 | if (!di->vddadc_en_usb) { | |
1566 | regulator_enable(di->regu); | |
1567 | di->vddadc_en_usb = true; | |
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); | |
1575 | curr_index = ab8500_current_to_regval(ich_out); | |
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 */ | |
1612 | ret = ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr); | |
1613 | if (ret) { | |
1614 | dev_err(di->dev, "setting USBChInputCurr failed\n"); | |
1615 | return ret; | |
1616 | } | |
1617 | ||
1618 | /* ChOutputCurentLevel: protected output current */ | |
1619 | ret = ab8500_charger_set_output_curr(di, ich_out); | |
1620 | if (ret) { | |
1621 | dev_err(di->dev, "%s " | |
1622 | "Failed to set ChOutputCurentLevel\n", | |
1623 | __func__); | |
1624 | return ret; | |
1625 | } | |
1626 | ||
84edbeea AM |
1627 | queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ); |
1628 | ||
84edbeea AM |
1629 | } else { |
1630 | /* Disable USB charging */ | |
34c11a70 | 1631 | dev_dbg(di->dev, "%s Disabled USB charging\n", __func__); |
84edbeea AM |
1632 | ret = abx500_set_register_interruptible(di->dev, |
1633 | AB8500_CHARGER, | |
1634 | AB8500_USBCH_CTRL1_REG, 0); | |
1635 | if (ret) { | |
1636 | dev_err(di->dev, | |
1637 | "%s write failed\n", __func__); | |
1638 | return ret; | |
1639 | } | |
1640 | ||
1641 | ret = ab8500_charger_led_en(di, false); | |
1642 | if (ret < 0) | |
1643 | dev_err(di->dev, "failed to disable LED\n"); | |
34c11a70 POH |
1644 | /* USBChInputCurr: current that can be drawn from the usb */ |
1645 | ret = ab8500_charger_set_vbus_in_curr(di, 0); | |
1646 | if (ret) { | |
1647 | dev_err(di->dev, "setting USBChInputCurr failed\n"); | |
1648 | return ret; | |
1649 | } | |
84edbeea | 1650 | |
34c11a70 POH |
1651 | /* ChOutputCurentLevel: protected output current */ |
1652 | ret = ab8500_charger_set_output_curr(di, 0); | |
1653 | if (ret) { | |
1654 | dev_err(di->dev, "%s " | |
1655 | "Failed to reset ChOutputCurentLevel\n", | |
1656 | __func__); | |
1657 | return ret; | |
1658 | } | |
84edbeea AM |
1659 | di->usb.charger_online = 0; |
1660 | di->usb.wd_expired = false; | |
1661 | ||
1662 | /* Disable regulator if enabled */ | |
1663 | if (di->vddadc_en_usb) { | |
1664 | regulator_disable(di->regu); | |
1665 | di->vddadc_en_usb = false; | |
1666 | } | |
1667 | ||
1668 | dev_dbg(di->dev, "%s Disabled USB charging\n", __func__); | |
1669 | ||
1670 | /* Cancel any pending Vbat check work */ | |
1671 | if (delayed_work_pending(&di->check_vbat_work)) | |
1672 | cancel_delayed_work(&di->check_vbat_work); | |
1673 | ||
1674 | } | |
1675 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
1676 | ||
1677 | return ret; | |
1678 | } | |
1679 | ||
1680 | /** | |
1681 | * ab8500_charger_watchdog_kick() - kick charger watchdog | |
1682 | * @di: pointer to the ab8500_charger structure | |
1683 | * | |
1684 | * Kick charger watchdog | |
1685 | * Returns error code in case of failure else 0(on success) | |
1686 | */ | |
1687 | static int ab8500_charger_watchdog_kick(struct ux500_charger *charger) | |
1688 | { | |
1689 | int ret; | |
1690 | struct ab8500_charger *di; | |
1691 | ||
1692 | if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS) | |
1693 | di = to_ab8500_charger_ac_device_info(charger); | |
1694 | else if (charger->psy.type == POWER_SUPPLY_TYPE_USB) | |
1695 | di = to_ab8500_charger_usb_device_info(charger); | |
1696 | else | |
1697 | return -ENXIO; | |
1698 | ||
1699 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1700 | AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); | |
1701 | if (ret) | |
1702 | dev_err(di->dev, "Failed to kick WD!\n"); | |
1703 | ||
1704 | return ret; | |
1705 | } | |
1706 | ||
1707 | /** | |
1708 | * ab8500_charger_update_charger_current() - update charger current | |
1709 | * @di: pointer to the ab8500_charger structure | |
1710 | * | |
1711 | * Update the charger output current for the specified charger | |
1712 | * Returns error code in case of failure else 0(on success) | |
1713 | */ | |
1714 | static int ab8500_charger_update_charger_current(struct ux500_charger *charger, | |
1715 | int ich_out) | |
1716 | { | |
1717 | int ret; | |
84edbeea AM |
1718 | struct ab8500_charger *di; |
1719 | ||
1720 | if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS) | |
1721 | di = to_ab8500_charger_ac_device_info(charger); | |
1722 | else if (charger->psy.type == POWER_SUPPLY_TYPE_USB) | |
1723 | di = to_ab8500_charger_usb_device_info(charger); | |
1724 | else | |
1725 | return -ENXIO; | |
1726 | ||
f8e96dff | 1727 | ret = ab8500_charger_set_output_curr(di, ich_out); |
84edbeea | 1728 | if (ret) { |
f8e96dff JB |
1729 | dev_err(di->dev, "%s " |
1730 | "Failed to set ChOutputCurentLevel\n", | |
1731 | __func__); | |
84edbeea AM |
1732 | return ret; |
1733 | } | |
1734 | ||
1735 | /* Reset the main and usb drop input current measurement counter */ | |
1736 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1737 | AB8500_CHARGER_CTRL, | |
1738 | 0x1); | |
1739 | if (ret) { | |
1740 | dev_err(di->dev, "%s write failed\n", __func__); | |
1741 | return ret; | |
1742 | } | |
1743 | ||
1744 | return ret; | |
1745 | } | |
1746 | ||
1747 | static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data) | |
1748 | { | |
1749 | struct power_supply *psy; | |
1750 | struct power_supply *ext; | |
1751 | struct ab8500_charger *di; | |
1752 | union power_supply_propval ret; | |
1753 | int i, j; | |
1754 | bool psy_found = false; | |
1755 | struct ux500_charger *usb_chg; | |
1756 | ||
1757 | usb_chg = (struct ux500_charger *)data; | |
1758 | psy = &usb_chg->psy; | |
1759 | ||
1760 | di = to_ab8500_charger_usb_device_info(usb_chg); | |
1761 | ||
1762 | ext = dev_get_drvdata(dev); | |
1763 | ||
1764 | /* For all psy where the driver name appears in any supplied_to */ | |
1765 | for (i = 0; i < ext->num_supplicants; i++) { | |
1766 | if (!strcmp(ext->supplied_to[i], psy->name)) | |
1767 | psy_found = true; | |
1768 | } | |
1769 | ||
1770 | if (!psy_found) | |
1771 | return 0; | |
1772 | ||
1773 | /* Go through all properties for the psy */ | |
1774 | for (j = 0; j < ext->num_properties; j++) { | |
1775 | enum power_supply_property prop; | |
1776 | prop = ext->properties[j]; | |
1777 | ||
1778 | if (ext->get_property(ext, prop, &ret)) | |
1779 | continue; | |
1780 | ||
1781 | switch (prop) { | |
1782 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
1783 | switch (ext->type) { | |
1784 | case POWER_SUPPLY_TYPE_BATTERY: | |
1785 | di->vbat = ret.intval / 1000; | |
1786 | break; | |
1787 | default: | |
1788 | break; | |
1789 | } | |
1790 | break; | |
1791 | default: | |
1792 | break; | |
1793 | } | |
1794 | } | |
1795 | return 0; | |
1796 | } | |
1797 | ||
1798 | /** | |
1799 | * ab8500_charger_check_vbat_work() - keep vbus current within spec | |
1800 | * @work pointer to the work_struct structure | |
1801 | * | |
1802 | * Due to a asic bug it is necessary to lower the input current to the vbus | |
1803 | * charger when charging with at some specific levels. This issue is only valid | |
1804 | * for below a certain battery voltage. This function makes sure that the | |
1805 | * the allowed current limit isn't exceeded. | |
1806 | */ | |
1807 | static void ab8500_charger_check_vbat_work(struct work_struct *work) | |
1808 | { | |
1809 | int t = 10; | |
1810 | struct ab8500_charger *di = container_of(work, | |
1811 | struct ab8500_charger, check_vbat_work.work); | |
1812 | ||
1813 | class_for_each_device(power_supply_class, NULL, | |
1814 | &di->usb_chg.psy, ab8500_charger_get_ext_psy_data); | |
1815 | ||
1816 | /* First run old_vbat is 0. */ | |
1817 | if (di->old_vbat == 0) | |
1818 | di->old_vbat = di->vbat; | |
1819 | ||
1820 | if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED && | |
1821 | di->vbat <= VBAT_TRESH_IP_CUR_RED) || | |
1822 | (di->old_vbat > VBAT_TRESH_IP_CUR_RED && | |
1823 | di->vbat > VBAT_TRESH_IP_CUR_RED))) { | |
1824 | ||
1825 | dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d," | |
1826 | " old: %d\n", di->max_usb_in_curr, di->vbat, | |
1827 | di->old_vbat); | |
1828 | ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr); | |
1829 | power_supply_changed(&di->usb_chg.psy); | |
1830 | } | |
1831 | ||
1832 | di->old_vbat = di->vbat; | |
1833 | ||
1834 | /* | |
1835 | * No need to check the battery voltage every second when not close to | |
1836 | * the threshold. | |
1837 | */ | |
1838 | if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) && | |
1839 | (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100))) | |
1840 | t = 1; | |
1841 | ||
1842 | queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ); | |
1843 | } | |
1844 | ||
1845 | /** | |
1846 | * ab8500_charger_check_hw_failure_work() - check main charger failure | |
1847 | * @work: pointer to the work_struct structure | |
1848 | * | |
1849 | * Work queue function for checking the main charger status | |
1850 | */ | |
1851 | static void ab8500_charger_check_hw_failure_work(struct work_struct *work) | |
1852 | { | |
1853 | int ret; | |
1854 | u8 reg_value; | |
1855 | ||
1856 | struct ab8500_charger *di = container_of(work, | |
1857 | struct ab8500_charger, check_hw_failure_work.work); | |
1858 | ||
1859 | /* Check if the status bits for HW failure is still active */ | |
1860 | if (di->flags.mainextchnotok) { | |
1861 | ret = abx500_get_register_interruptible(di->dev, | |
1862 | AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value); | |
1863 | if (ret < 0) { | |
1864 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1865 | return; | |
1866 | } | |
1867 | if (!(reg_value & MAIN_CH_NOK)) { | |
1868 | di->flags.mainextchnotok = false; | |
1869 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
1870 | } | |
1871 | } | |
1872 | if (di->flags.vbus_ovv) { | |
1873 | ret = abx500_get_register_interruptible(di->dev, | |
1874 | AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, | |
1875 | ®_value); | |
1876 | if (ret < 0) { | |
1877 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1878 | return; | |
1879 | } | |
1880 | if (!(reg_value & VBUS_OVV_TH)) { | |
1881 | di->flags.vbus_ovv = false; | |
1882 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
1883 | } | |
1884 | } | |
1885 | /* If we still have a failure, schedule a new check */ | |
1886 | if (di->flags.mainextchnotok || di->flags.vbus_ovv) { | |
1887 | queue_delayed_work(di->charger_wq, | |
1888 | &di->check_hw_failure_work, round_jiffies(HZ)); | |
1889 | } | |
1890 | } | |
1891 | ||
1892 | /** | |
1893 | * ab8500_charger_kick_watchdog_work() - kick the watchdog | |
1894 | * @work: pointer to the work_struct structure | |
1895 | * | |
1896 | * Work queue function for kicking the charger watchdog. | |
1897 | * | |
1898 | * For ABB revision 1.0 and 1.1 there is a bug in the watchdog | |
1899 | * logic. That means we have to continously kick the charger | |
1900 | * watchdog even when no charger is connected. This is only | |
1901 | * valid once the AC charger has been enabled. This is | |
1902 | * a bug that is not handled by the algorithm and the | |
1903 | * watchdog have to be kicked by the charger driver | |
1904 | * when the AC charger is disabled | |
1905 | */ | |
1906 | static void ab8500_charger_kick_watchdog_work(struct work_struct *work) | |
1907 | { | |
1908 | int ret; | |
1909 | ||
1910 | struct ab8500_charger *di = container_of(work, | |
1911 | struct ab8500_charger, kick_wd_work.work); | |
1912 | ||
1913 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
1914 | AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); | |
1915 | if (ret) | |
1916 | dev_err(di->dev, "Failed to kick WD!\n"); | |
1917 | ||
1918 | /* Schedule a new watchdog kick */ | |
1919 | queue_delayed_work(di->charger_wq, | |
1920 | &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL)); | |
1921 | } | |
1922 | ||
1923 | /** | |
1924 | * ab8500_charger_ac_work() - work to get and set main charger status | |
1925 | * @work: pointer to the work_struct structure | |
1926 | * | |
1927 | * Work queue function for checking the main charger status | |
1928 | */ | |
1929 | static void ab8500_charger_ac_work(struct work_struct *work) | |
1930 | { | |
1931 | int ret; | |
1932 | ||
1933 | struct ab8500_charger *di = container_of(work, | |
1934 | struct ab8500_charger, ac_work); | |
1935 | ||
1936 | /* | |
1937 | * Since we can't be sure that the events are received | |
1938 | * synchronously, we have the check if the main charger is | |
1939 | * connected by reading the status register | |
1940 | */ | |
34c11a70 | 1941 | ret = ab8500_charger_detect_chargers(di, false); |
84edbeea AM |
1942 | if (ret < 0) |
1943 | return; | |
1944 | ||
1945 | if (ret & AC_PW_CONN) { | |
1946 | di->ac.charger_connected = 1; | |
1947 | di->ac_conn = true; | |
1948 | } else { | |
1949 | di->ac.charger_connected = 0; | |
1950 | } | |
1951 | ||
1952 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
1953 | sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present"); | |
1954 | } | |
1955 | ||
b269fff4 LJ |
1956 | static void ab8500_charger_usb_attached_work(struct work_struct *work) |
1957 | { | |
1958 | struct ab8500_charger *di = container_of(work, | |
1959 | struct ab8500_charger, | |
1960 | usb_charger_attached_work.work); | |
1961 | int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC); | |
1962 | int ret, i; | |
1963 | u8 statval; | |
1964 | ||
1965 | for (i = 0; i < 10; i++) { | |
1966 | ret = abx500_get_register_interruptible(di->dev, | |
1967 | AB8500_CHARGER, | |
1968 | AB8500_CH_USBCH_STAT1_REG, | |
1969 | &statval); | |
1970 | if (ret < 0) { | |
1971 | dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); | |
1972 | goto reschedule; | |
1973 | } | |
1974 | if ((statval & usbch) != usbch) | |
1975 | goto reschedule; | |
1976 | ||
1977 | msleep(CHARGER_STATUS_POLL); | |
1978 | } | |
1979 | ||
1980 | ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0); | |
1981 | ||
1982 | mutex_lock(&di->charger_attached_mutex); | |
1983 | mutex_unlock(&di->charger_attached_mutex); | |
1984 | ||
1985 | return; | |
1986 | ||
1987 | reschedule: | |
1988 | queue_delayed_work(di->charger_wq, | |
1989 | &di->usb_charger_attached_work, | |
1990 | HZ); | |
1991 | } | |
1992 | ||
1993 | static void ab8500_charger_ac_attached_work(struct work_struct *work) | |
1994 | { | |
1995 | ||
1996 | struct ab8500_charger *di = container_of(work, | |
1997 | struct ab8500_charger, | |
1998 | ac_charger_attached_work.work); | |
1999 | int mainch = (MAIN_CH_STATUS2_MAINCHGDROP | | |
2000 | MAIN_CH_STATUS2_MAINCHARGERDETDBNC); | |
2001 | int ret, i; | |
2002 | u8 statval; | |
2003 | ||
2004 | for (i = 0; i < 10; i++) { | |
2005 | ret = abx500_get_register_interruptible(di->dev, | |
2006 | AB8500_CHARGER, | |
2007 | AB8500_CH_STATUS2_REG, | |
2008 | &statval); | |
2009 | if (ret < 0) { | |
2010 | dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); | |
2011 | goto reschedule; | |
2012 | } | |
2013 | ||
2014 | if ((statval & mainch) != mainch) | |
2015 | goto reschedule; | |
2016 | ||
2017 | msleep(CHARGER_STATUS_POLL); | |
2018 | } | |
2019 | ||
2020 | ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0); | |
2021 | queue_work(di->charger_wq, &di->ac_work); | |
2022 | ||
2023 | mutex_lock(&di->charger_attached_mutex); | |
2024 | mutex_unlock(&di->charger_attached_mutex); | |
2025 | ||
2026 | return; | |
2027 | ||
2028 | reschedule: | |
2029 | queue_delayed_work(di->charger_wq, | |
2030 | &di->ac_charger_attached_work, | |
2031 | HZ); | |
2032 | } | |
2033 | ||
84edbeea AM |
2034 | /** |
2035 | * ab8500_charger_detect_usb_type_work() - work to detect USB type | |
2036 | * @work: Pointer to the work_struct structure | |
2037 | * | |
2038 | * Detect the type of USB plugged | |
2039 | */ | |
64eb9b02 | 2040 | static void ab8500_charger_detect_usb_type_work(struct work_struct *work) |
84edbeea AM |
2041 | { |
2042 | int ret; | |
2043 | ||
2044 | struct ab8500_charger *di = container_of(work, | |
2045 | struct ab8500_charger, detect_usb_type_work); | |
2046 | ||
2047 | /* | |
2048 | * Since we can't be sure that the events are received | |
2049 | * synchronously, we have the check if is | |
2050 | * connected by reading the status register | |
2051 | */ | |
34c11a70 | 2052 | ret = ab8500_charger_detect_chargers(di, false); |
84edbeea AM |
2053 | if (ret < 0) |
2054 | return; | |
2055 | ||
2056 | if (!(ret & USB_PW_CONN)) { | |
34c11a70 POH |
2057 | dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__); |
2058 | di->vbus_detected = false; | |
84edbeea AM |
2059 | ab8500_charger_set_usb_connected(di, false); |
2060 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2061 | } else { | |
34c11a70 POH |
2062 | dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__); |
2063 | di->vbus_detected = true; | |
84edbeea AM |
2064 | |
2065 | if (is_ab8500_1p1_or_earlier(di->parent)) { | |
2066 | ret = ab8500_charger_detect_usb_type(di); | |
2067 | if (!ret) { | |
2068 | ab8500_charger_set_usb_connected(di, true); | |
2069 | ab8500_power_supply_changed(di, | |
2070 | &di->usb_chg.psy); | |
2071 | } | |
2072 | } else { | |
34c11a70 POH |
2073 | /* |
2074 | * For ABB cut2.0 and onwards we have an IRQ, | |
84edbeea AM |
2075 | * USB_LINK_STATUS that will be triggered when the USB |
2076 | * link status changes. The exception is USB connected | |
2077 | * during startup. Then we don't get a | |
2078 | * USB_LINK_STATUS IRQ | |
2079 | */ | |
2080 | if (di->vbus_detected_start) { | |
2081 | di->vbus_detected_start = false; | |
2082 | ret = ab8500_charger_detect_usb_type(di); | |
2083 | if (!ret) { | |
2084 | ab8500_charger_set_usb_connected(di, | |
2085 | true); | |
2086 | ab8500_power_supply_changed(di, | |
2087 | &di->usb_chg.psy); | |
2088 | } | |
2089 | } | |
2090 | } | |
2091 | } | |
2092 | } | |
2093 | ||
4b45f4a9 | 2094 | /** |
34c11a70 | 2095 | * ab8500_charger_usb_link_attach_work() - work to detect USB type |
4b45f4a9 MC |
2096 | * @work: pointer to the work_struct structure |
2097 | * | |
2098 | * Detect the type of USB plugged | |
2099 | */ | |
2100 | static void ab8500_charger_usb_link_attach_work(struct work_struct *work) | |
2101 | { | |
2102 | struct ab8500_charger *di = | |
2103 | container_of(work, struct ab8500_charger, attach_work.work); | |
2104 | int ret; | |
2105 | ||
2106 | /* Update maximum input current if USB enumeration is not detected */ | |
2107 | if (!di->usb.charger_online) { | |
2108 | ret = ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr); | |
2109 | if (ret) | |
2110 | return; | |
2111 | } | |
2112 | ||
2113 | ab8500_charger_set_usb_connected(di, true); | |
2114 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2115 | } | |
2116 | ||
84edbeea AM |
2117 | /** |
2118 | * ab8500_charger_usb_link_status_work() - work to detect USB type | |
2119 | * @work: pointer to the work_struct structure | |
2120 | * | |
2121 | * Detect the type of USB plugged | |
2122 | */ | |
2123 | static void ab8500_charger_usb_link_status_work(struct work_struct *work) | |
2124 | { | |
ff38090a | 2125 | int detected_chargers; |
84edbeea | 2126 | int ret; |
ff38090a | 2127 | u8 val; |
84edbeea AM |
2128 | |
2129 | struct ab8500_charger *di = container_of(work, | |
2130 | struct ab8500_charger, usb_link_status_work); | |
2131 | ||
2132 | /* | |
2133 | * Since we can't be sure that the events are received | |
2134 | * synchronously, we have the check if is | |
2135 | * connected by reading the status register | |
2136 | */ | |
34c11a70 | 2137 | detected_chargers = ab8500_charger_detect_chargers(di, false); |
ff38090a | 2138 | if (detected_chargers < 0) |
84edbeea AM |
2139 | return; |
2140 | ||
ff38090a HS |
2141 | /* |
2142 | * Some chargers that breaks the USB spec is | |
2143 | * identified as invalid by AB8500 and it refuse | |
2144 | * to start the charging process. but by jumping | |
2145 | * thru a few hoops it can be forced to start. | |
2146 | */ | |
2147 | ret = abx500_get_register_interruptible(di->dev, AB8500_USB, | |
2148 | AB8500_USB_LINE_STAT_REG, &val); | |
2149 | if (ret >= 0) | |
2150 | dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val); | |
2151 | else | |
2152 | dev_dbg(di->dev, "Error reading USB link status\n"); | |
2153 | ||
2154 | if (detected_chargers & USB_PW_CONN) { | |
2155 | if (((val & AB8500_USB_LINK_STATUS) >> 3) == USB_STAT_NOT_VALID_LINK && | |
2156 | di->invalid_charger_detect_state == 0) { | |
2157 | dev_dbg(di->dev, "Invalid charger detected, state= 0\n"); | |
2158 | /*Enable charger*/ | |
2159 | abx500_mask_and_set_register_interruptible(di->dev, | |
2160 | AB8500_CHARGER, AB8500_USBCH_CTRL1_REG, 0x01, 0x01); | |
2161 | /*Enable charger detection*/ | |
2162 | abx500_mask_and_set_register_interruptible(di->dev, AB8500_USB, | |
2163 | AB8500_MCH_IPT_CURLVL_REG, 0x01, 0x01); | |
2164 | di->invalid_charger_detect_state = 1; | |
2165 | /*exit and wait for new link status interrupt.*/ | |
2166 | return; | |
2167 | ||
2168 | } | |
2169 | if (di->invalid_charger_detect_state == 1) { | |
2170 | dev_dbg(di->dev, "Invalid charger detected, state= 1\n"); | |
2171 | /*Stop charger detection*/ | |
2172 | abx500_mask_and_set_register_interruptible(di->dev, AB8500_USB, | |
2173 | AB8500_MCH_IPT_CURLVL_REG, 0x01, 0x00); | |
2174 | /*Check link status*/ | |
2175 | ret = abx500_get_register_interruptible(di->dev, AB8500_USB, | |
2176 | AB8500_USB_LINE_STAT_REG, &val); | |
2177 | dev_dbg(di->dev, "USB link status= 0x%02x\n", | |
2178 | (val & AB8500_USB_LINK_STATUS) >> 3); | |
2179 | di->invalid_charger_detect_state = 2; | |
2180 | } | |
2181 | } else { | |
2182 | di->invalid_charger_detect_state = 0; | |
2183 | } | |
2184 | ||
2185 | if (!(detected_chargers & USB_PW_CONN)) { | |
34c11a70 | 2186 | di->vbus_detected = false; |
84edbeea AM |
2187 | ab8500_charger_set_usb_connected(di, false); |
2188 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
4b45f4a9 MC |
2189 | return; |
2190 | } | |
84edbeea | 2191 | |
34c11a70 POH |
2192 | dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__); |
2193 | di->vbus_detected = true; | |
4b45f4a9 | 2194 | ret = ab8500_charger_read_usb_type(di); |
34c11a70 POH |
2195 | if (ret) { |
2196 | if (ret == -ENXIO) { | |
2197 | /* No valid charger type detected */ | |
2198 | ab8500_charger_set_usb_connected(di, false); | |
2199 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
84edbeea | 2200 | } |
34c11a70 POH |
2201 | return; |
2202 | } | |
2203 | ||
2204 | if (di->usb_device_is_unrecognised) { | |
2205 | dev_dbg(di->dev, | |
2206 | "Potential Legacy Charger device. " | |
2207 | "Delay work for %d msec for USB enum " | |
2208 | "to finish", | |
2209 | WAIT_ACA_RID_ENUMERATION); | |
2210 | queue_delayed_work(di->charger_wq, | |
2211 | &di->attach_work, | |
2212 | msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION)); | |
2213 | } else if (di->is_aca_rid == 1) { | |
2214 | /* Only wait once */ | |
2215 | di->is_aca_rid++; | |
2216 | dev_dbg(di->dev, | |
2217 | "%s Wait %d msec for USB enum to finish", | |
2218 | __func__, WAIT_ACA_RID_ENUMERATION); | |
2219 | queue_delayed_work(di->charger_wq, | |
2220 | &di->attach_work, | |
2221 | msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION)); | |
2222 | } else { | |
2223 | queue_delayed_work(di->charger_wq, | |
2224 | &di->attach_work, | |
2225 | 0); | |
84edbeea AM |
2226 | } |
2227 | } | |
2228 | ||
2229 | static void ab8500_charger_usb_state_changed_work(struct work_struct *work) | |
2230 | { | |
2231 | int ret; | |
2232 | unsigned long flags; | |
2233 | ||
2234 | struct ab8500_charger *di = container_of(work, | |
34c11a70 | 2235 | struct ab8500_charger, usb_state_changed_work.work); |
84edbeea | 2236 | |
34c11a70 POH |
2237 | if (!di->vbus_detected) { |
2238 | dev_dbg(di->dev, | |
2239 | "%s !di->vbus_detected\n", | |
2240 | __func__); | |
84edbeea | 2241 | return; |
34c11a70 | 2242 | } |
84edbeea AM |
2243 | |
2244 | spin_lock_irqsave(&di->usb_state.usb_lock, flags); | |
34c11a70 POH |
2245 | di->usb_state.state = di->usb_state.state_tmp; |
2246 | di->usb_state.usb_current = di->usb_state.usb_current_tmp; | |
84edbeea AM |
2247 | spin_unlock_irqrestore(&di->usb_state.usb_lock, flags); |
2248 | ||
84edbeea AM |
2249 | dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n", |
2250 | __func__, di->usb_state.state, di->usb_state.usb_current); | |
2251 | ||
2252 | switch (di->usb_state.state) { | |
2253 | case AB8500_BM_USB_STATE_RESET_HS: | |
2254 | case AB8500_BM_USB_STATE_RESET_FS: | |
2255 | case AB8500_BM_USB_STATE_SUSPEND: | |
2256 | case AB8500_BM_USB_STATE_MAX: | |
2257 | ab8500_charger_set_usb_connected(di, false); | |
2258 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2259 | break; | |
2260 | ||
2261 | case AB8500_BM_USB_STATE_RESUME: | |
2262 | /* | |
2263 | * when suspend->resume there should be delay | |
2264 | * of 1sec for enabling charging | |
2265 | */ | |
2266 | msleep(1000); | |
2267 | /* Intentional fall through */ | |
2268 | case AB8500_BM_USB_STATE_CONFIGURED: | |
2269 | /* | |
2270 | * USB is configured, enable charging with the charging | |
2271 | * input current obtained from USB driver | |
2272 | */ | |
2273 | if (!ab8500_charger_get_usb_cur(di)) { | |
2274 | /* Update maximum input current */ | |
2275 | ret = ab8500_charger_set_vbus_in_curr(di, | |
2276 | di->max_usb_in_curr); | |
2277 | if (ret) | |
2278 | return; | |
2279 | ||
2280 | ab8500_charger_set_usb_connected(di, true); | |
2281 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2282 | } | |
2283 | break; | |
2284 | ||
2285 | default: | |
2286 | break; | |
2287 | }; | |
2288 | } | |
2289 | ||
2290 | /** | |
2291 | * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status | |
2292 | * @work: pointer to the work_struct structure | |
2293 | * | |
2294 | * Work queue function for checking the USB charger Not OK status | |
2295 | */ | |
2296 | static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work) | |
2297 | { | |
2298 | int ret; | |
2299 | u8 reg_value; | |
2300 | bool prev_status; | |
2301 | ||
2302 | struct ab8500_charger *di = container_of(work, | |
2303 | struct ab8500_charger, check_usbchgnotok_work.work); | |
2304 | ||
2305 | /* Check if the status bit for usbchargernotok is still active */ | |
2306 | ret = abx500_get_register_interruptible(di->dev, | |
2307 | AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value); | |
2308 | if (ret < 0) { | |
2309 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
2310 | return; | |
2311 | } | |
2312 | prev_status = di->flags.usbchargernotok; | |
2313 | ||
2314 | if (reg_value & VBUS_CH_NOK) { | |
2315 | di->flags.usbchargernotok = true; | |
2316 | /* Check again in 1sec */ | |
2317 | queue_delayed_work(di->charger_wq, | |
2318 | &di->check_usbchgnotok_work, HZ); | |
2319 | } else { | |
2320 | di->flags.usbchargernotok = false; | |
2321 | di->flags.vbus_collapse = false; | |
2322 | } | |
2323 | ||
2324 | if (prev_status != di->flags.usbchargernotok) | |
2325 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2326 | } | |
2327 | ||
2328 | /** | |
2329 | * ab8500_charger_check_main_thermal_prot_work() - check main thermal status | |
2330 | * @work: pointer to the work_struct structure | |
2331 | * | |
2332 | * Work queue function for checking the Main thermal prot status | |
2333 | */ | |
2334 | static void ab8500_charger_check_main_thermal_prot_work( | |
2335 | struct work_struct *work) | |
2336 | { | |
2337 | int ret; | |
2338 | u8 reg_value; | |
2339 | ||
2340 | struct ab8500_charger *di = container_of(work, | |
2341 | struct ab8500_charger, check_main_thermal_prot_work); | |
2342 | ||
2343 | /* Check if the status bit for main_thermal_prot is still active */ | |
2344 | ret = abx500_get_register_interruptible(di->dev, | |
2345 | AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value); | |
2346 | if (ret < 0) { | |
2347 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
2348 | return; | |
2349 | } | |
2350 | if (reg_value & MAIN_CH_TH_PROT) | |
2351 | di->flags.main_thermal_prot = true; | |
2352 | else | |
2353 | di->flags.main_thermal_prot = false; | |
2354 | ||
2355 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
2356 | } | |
2357 | ||
2358 | /** | |
2359 | * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status | |
2360 | * @work: pointer to the work_struct structure | |
2361 | * | |
2362 | * Work queue function for checking the USB thermal prot status | |
2363 | */ | |
2364 | static void ab8500_charger_check_usb_thermal_prot_work( | |
2365 | struct work_struct *work) | |
2366 | { | |
2367 | int ret; | |
2368 | u8 reg_value; | |
2369 | ||
2370 | struct ab8500_charger *di = container_of(work, | |
2371 | struct ab8500_charger, check_usb_thermal_prot_work); | |
2372 | ||
2373 | /* Check if the status bit for usb_thermal_prot is still active */ | |
2374 | ret = abx500_get_register_interruptible(di->dev, | |
2375 | AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value); | |
2376 | if (ret < 0) { | |
2377 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
2378 | return; | |
2379 | } | |
2380 | if (reg_value & USB_CH_TH_PROT) | |
2381 | di->flags.usb_thermal_prot = true; | |
2382 | else | |
2383 | di->flags.usb_thermal_prot = false; | |
2384 | ||
2385 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2386 | } | |
2387 | ||
2388 | /** | |
2389 | * ab8500_charger_mainchunplugdet_handler() - main charger unplugged | |
2390 | * @irq: interrupt number | |
2391 | * @_di: pointer to the ab8500_charger structure | |
2392 | * | |
2393 | * Returns IRQ status(IRQ_HANDLED) | |
2394 | */ | |
2395 | static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di) | |
2396 | { | |
2397 | struct ab8500_charger *di = _di; | |
2398 | ||
2399 | dev_dbg(di->dev, "Main charger unplugged\n"); | |
2400 | queue_work(di->charger_wq, &di->ac_work); | |
2401 | ||
b269fff4 LJ |
2402 | cancel_delayed_work_sync(&di->ac_charger_attached_work); |
2403 | mutex_lock(&di->charger_attached_mutex); | |
2404 | mutex_unlock(&di->charger_attached_mutex); | |
2405 | ||
84edbeea AM |
2406 | return IRQ_HANDLED; |
2407 | } | |
2408 | ||
2409 | /** | |
2410 | * ab8500_charger_mainchplugdet_handler() - main charger plugged | |
2411 | * @irq: interrupt number | |
2412 | * @_di: pointer to the ab8500_charger structure | |
2413 | * | |
2414 | * Returns IRQ status(IRQ_HANDLED) | |
2415 | */ | |
2416 | static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di) | |
2417 | { | |
2418 | struct ab8500_charger *di = _di; | |
2419 | ||
2420 | dev_dbg(di->dev, "Main charger plugged\n"); | |
2421 | queue_work(di->charger_wq, &di->ac_work); | |
2422 | ||
b269fff4 LJ |
2423 | mutex_lock(&di->charger_attached_mutex); |
2424 | mutex_unlock(&di->charger_attached_mutex); | |
2425 | queue_delayed_work(di->charger_wq, | |
2426 | &di->ac_charger_attached_work, | |
2427 | HZ); | |
84edbeea AM |
2428 | return IRQ_HANDLED; |
2429 | } | |
2430 | ||
2431 | /** | |
2432 | * ab8500_charger_mainextchnotok_handler() - main charger not ok | |
2433 | * @irq: interrupt number | |
2434 | * @_di: pointer to the ab8500_charger structure | |
2435 | * | |
2436 | * Returns IRQ status(IRQ_HANDLED) | |
2437 | */ | |
2438 | static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di) | |
2439 | { | |
2440 | struct ab8500_charger *di = _di; | |
2441 | ||
2442 | dev_dbg(di->dev, "Main charger not ok\n"); | |
2443 | di->flags.mainextchnotok = true; | |
2444 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
2445 | ||
2446 | /* Schedule a new HW failure check */ | |
2447 | queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); | |
2448 | ||
2449 | return IRQ_HANDLED; | |
2450 | } | |
2451 | ||
2452 | /** | |
2453 | * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger | |
2454 | * thermal protection threshold | |
2455 | * @irq: interrupt number | |
2456 | * @_di: pointer to the ab8500_charger structure | |
2457 | * | |
2458 | * Returns IRQ status(IRQ_HANDLED) | |
2459 | */ | |
2460 | static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di) | |
2461 | { | |
2462 | struct ab8500_charger *di = _di; | |
2463 | ||
2464 | dev_dbg(di->dev, | |
2465 | "Die temp above Main charger thermal protection threshold\n"); | |
2466 | queue_work(di->charger_wq, &di->check_main_thermal_prot_work); | |
2467 | ||
2468 | return IRQ_HANDLED; | |
2469 | } | |
2470 | ||
2471 | /** | |
2472 | * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger | |
2473 | * thermal protection threshold | |
2474 | * @irq: interrupt number | |
2475 | * @_di: pointer to the ab8500_charger structure | |
2476 | * | |
2477 | * Returns IRQ status(IRQ_HANDLED) | |
2478 | */ | |
2479 | static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di) | |
2480 | { | |
2481 | struct ab8500_charger *di = _di; | |
2482 | ||
2483 | dev_dbg(di->dev, | |
2484 | "Die temp ok for Main charger thermal protection threshold\n"); | |
2485 | queue_work(di->charger_wq, &di->check_main_thermal_prot_work); | |
2486 | ||
2487 | return IRQ_HANDLED; | |
2488 | } | |
2489 | ||
34c11a70 POH |
2490 | static void ab8500_charger_vbus_drop_end_work(struct work_struct *work) |
2491 | { | |
2492 | struct ab8500_charger *di = container_of(work, | |
2493 | struct ab8500_charger, vbus_drop_end_work.work); | |
2494 | ||
2495 | di->flags.vbus_drop_end = false; | |
2496 | ||
2497 | /* Reset the drop counter */ | |
2498 | abx500_set_register_interruptible(di->dev, | |
2499 | AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01); | |
2500 | ||
2501 | if (di->usb.charger_connected) | |
2502 | ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr); | |
2503 | } | |
2504 | ||
84edbeea AM |
2505 | /** |
2506 | * ab8500_charger_vbusdetf_handler() - VBUS falling detected | |
2507 | * @irq: interrupt number | |
2508 | * @_di: pointer to the ab8500_charger structure | |
2509 | * | |
2510 | * Returns IRQ status(IRQ_HANDLED) | |
2511 | */ | |
2512 | static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di) | |
2513 | { | |
2514 | struct ab8500_charger *di = _di; | |
2515 | ||
34c11a70 | 2516 | di->vbus_detected = false; |
84edbeea AM |
2517 | dev_dbg(di->dev, "VBUS falling detected\n"); |
2518 | queue_work(di->charger_wq, &di->detect_usb_type_work); | |
2519 | ||
2520 | return IRQ_HANDLED; | |
2521 | } | |
2522 | ||
2523 | /** | |
2524 | * ab8500_charger_vbusdetr_handler() - VBUS rising detected | |
2525 | * @irq: interrupt number | |
2526 | * @_di: pointer to the ab8500_charger structure | |
2527 | * | |
2528 | * Returns IRQ status(IRQ_HANDLED) | |
2529 | */ | |
2530 | static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di) | |
2531 | { | |
2532 | struct ab8500_charger *di = _di; | |
2533 | ||
2534 | di->vbus_detected = true; | |
2535 | dev_dbg(di->dev, "VBUS rising detected\n"); | |
34c11a70 | 2536 | |
84edbeea AM |
2537 | queue_work(di->charger_wq, &di->detect_usb_type_work); |
2538 | ||
2539 | return IRQ_HANDLED; | |
2540 | } | |
2541 | ||
2542 | /** | |
2543 | * ab8500_charger_usblinkstatus_handler() - USB link status has changed | |
2544 | * @irq: interrupt number | |
2545 | * @_di: pointer to the ab8500_charger structure | |
2546 | * | |
2547 | * Returns IRQ status(IRQ_HANDLED) | |
2548 | */ | |
2549 | static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di) | |
2550 | { | |
2551 | struct ab8500_charger *di = _di; | |
2552 | ||
2553 | dev_dbg(di->dev, "USB link status changed\n"); | |
2554 | ||
2555 | queue_work(di->charger_wq, &di->usb_link_status_work); | |
2556 | ||
2557 | return IRQ_HANDLED; | |
2558 | } | |
2559 | ||
2560 | /** | |
2561 | * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger | |
2562 | * thermal protection threshold | |
2563 | * @irq: interrupt number | |
2564 | * @_di: pointer to the ab8500_charger structure | |
2565 | * | |
2566 | * Returns IRQ status(IRQ_HANDLED) | |
2567 | */ | |
2568 | static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di) | |
2569 | { | |
2570 | struct ab8500_charger *di = _di; | |
2571 | ||
2572 | dev_dbg(di->dev, | |
2573 | "Die temp above USB charger thermal protection threshold\n"); | |
2574 | queue_work(di->charger_wq, &di->check_usb_thermal_prot_work); | |
2575 | ||
2576 | return IRQ_HANDLED; | |
2577 | } | |
2578 | ||
2579 | /** | |
2580 | * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger | |
2581 | * thermal protection threshold | |
2582 | * @irq: interrupt number | |
2583 | * @_di: pointer to the ab8500_charger structure | |
2584 | * | |
2585 | * Returns IRQ status(IRQ_HANDLED) | |
2586 | */ | |
2587 | static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di) | |
2588 | { | |
2589 | struct ab8500_charger *di = _di; | |
2590 | ||
2591 | dev_dbg(di->dev, | |
2592 | "Die temp ok for USB charger thermal protection threshold\n"); | |
2593 | queue_work(di->charger_wq, &di->check_usb_thermal_prot_work); | |
2594 | ||
2595 | return IRQ_HANDLED; | |
2596 | } | |
2597 | ||
2598 | /** | |
2599 | * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected | |
2600 | * @irq: interrupt number | |
2601 | * @_di: pointer to the ab8500_charger structure | |
2602 | * | |
2603 | * Returns IRQ status(IRQ_HANDLED) | |
2604 | */ | |
2605 | static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di) | |
2606 | { | |
2607 | struct ab8500_charger *di = _di; | |
2608 | ||
2609 | dev_dbg(di->dev, "Not allowed USB charger detected\n"); | |
2610 | queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0); | |
2611 | ||
2612 | return IRQ_HANDLED; | |
2613 | } | |
2614 | ||
2615 | /** | |
2616 | * ab8500_charger_chwdexp_handler() - Charger watchdog expired | |
2617 | * @irq: interrupt number | |
2618 | * @_di: pointer to the ab8500_charger structure | |
2619 | * | |
2620 | * Returns IRQ status(IRQ_HANDLED) | |
2621 | */ | |
2622 | static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di) | |
2623 | { | |
2624 | struct ab8500_charger *di = _di; | |
2625 | ||
2626 | dev_dbg(di->dev, "Charger watchdog expired\n"); | |
2627 | ||
2628 | /* | |
2629 | * The charger that was online when the watchdog expired | |
2630 | * needs to be restarted for charging to start again | |
2631 | */ | |
2632 | if (di->ac.charger_online) { | |
2633 | di->ac.wd_expired = true; | |
2634 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
2635 | } | |
2636 | if (di->usb.charger_online) { | |
2637 | di->usb.wd_expired = true; | |
2638 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2639 | } | |
2640 | ||
2641 | return IRQ_HANDLED; | |
2642 | } | |
2643 | ||
34c11a70 POH |
2644 | /** |
2645 | * ab8500_charger_vbuschdropend_handler() - VBUS drop removed | |
2646 | * @irq: interrupt number | |
2647 | * @_di: pointer to the ab8500_charger structure | |
2648 | * | |
2649 | * Returns IRQ status(IRQ_HANDLED) | |
2650 | */ | |
2651 | static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di) | |
2652 | { | |
2653 | struct ab8500_charger *di = _di; | |
2654 | ||
2655 | dev_dbg(di->dev, "VBUS charger drop ended\n"); | |
2656 | di->flags.vbus_drop_end = true; | |
2657 | queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, | |
2658 | round_jiffies(30 * HZ)); | |
2659 | ||
2660 | return IRQ_HANDLED; | |
2661 | } | |
2662 | ||
84edbeea AM |
2663 | /** |
2664 | * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected | |
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_vbusovv_handler(int irq, void *_di) | |
2671 | { | |
2672 | struct ab8500_charger *di = _di; | |
2673 | ||
2674 | dev_dbg(di->dev, "VBUS overvoltage detected\n"); | |
2675 | di->flags.vbus_ovv = true; | |
2676 | ab8500_power_supply_changed(di, &di->usb_chg.psy); | |
2677 | ||
2678 | /* Schedule a new HW failure check */ | |
2679 | queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); | |
2680 | ||
2681 | return IRQ_HANDLED; | |
2682 | } | |
2683 | ||
2684 | /** | |
2685 | * ab8500_charger_ac_get_property() - get the ac/mains properties | |
2686 | * @psy: pointer to the power_supply structure | |
2687 | * @psp: pointer to the power_supply_property structure | |
2688 | * @val: pointer to the power_supply_propval union | |
2689 | * | |
2690 | * This function gets called when an application tries to get the ac/mains | |
2691 | * properties by reading the sysfs files. | |
2692 | * AC/Mains properties are online, present and voltage. | |
2693 | * online: ac/mains charging is in progress or not | |
2694 | * present: presence of the ac/mains | |
2695 | * voltage: AC/Mains voltage | |
2696 | * Returns error code in case of failure else 0(on success) | |
2697 | */ | |
2698 | static int ab8500_charger_ac_get_property(struct power_supply *psy, | |
2699 | enum power_supply_property psp, | |
2700 | union power_supply_propval *val) | |
2701 | { | |
2702 | struct ab8500_charger *di; | |
a864c5a8 | 2703 | int ret; |
84edbeea AM |
2704 | |
2705 | di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy)); | |
2706 | ||
2707 | switch (psp) { | |
2708 | case POWER_SUPPLY_PROP_HEALTH: | |
2709 | if (di->flags.mainextchnotok) | |
2710 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
2711 | else if (di->ac.wd_expired || di->usb.wd_expired) | |
2712 | val->intval = POWER_SUPPLY_HEALTH_DEAD; | |
2713 | else if (di->flags.main_thermal_prot) | |
2714 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
2715 | else | |
2716 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
2717 | break; | |
2718 | case POWER_SUPPLY_PROP_ONLINE: | |
2719 | val->intval = di->ac.charger_online; | |
2720 | break; | |
2721 | case POWER_SUPPLY_PROP_PRESENT: | |
2722 | val->intval = di->ac.charger_connected; | |
2723 | break; | |
2724 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a864c5a8 JA |
2725 | ret = ab8500_charger_get_ac_voltage(di); |
2726 | if (ret >= 0) | |
2727 | di->ac.charger_voltage = ret; | |
2728 | /* On error, use previous value */ | |
84edbeea AM |
2729 | val->intval = di->ac.charger_voltage * 1000; |
2730 | break; | |
2731 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
2732 | /* | |
2733 | * This property is used to indicate when CV mode is entered | |
2734 | * for the AC charger | |
2735 | */ | |
2736 | di->ac.cv_active = ab8500_charger_ac_cv(di); | |
2737 | val->intval = di->ac.cv_active; | |
2738 | break; | |
2739 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
a864c5a8 JA |
2740 | ret = ab8500_charger_get_ac_current(di); |
2741 | if (ret >= 0) | |
2742 | di->ac.charger_current = ret; | |
2743 | val->intval = di->ac.charger_current * 1000; | |
84edbeea AM |
2744 | break; |
2745 | default: | |
2746 | return -EINVAL; | |
2747 | } | |
2748 | return 0; | |
2749 | } | |
2750 | ||
2751 | /** | |
2752 | * ab8500_charger_usb_get_property() - get the usb properties | |
2753 | * @psy: pointer to the power_supply structure | |
2754 | * @psp: pointer to the power_supply_property structure | |
2755 | * @val: pointer to the power_supply_propval union | |
2756 | * | |
2757 | * This function gets called when an application tries to get the usb | |
2758 | * properties by reading the sysfs files. | |
2759 | * USB properties are online, present and voltage. | |
2760 | * online: usb charging is in progress or not | |
2761 | * present: presence of the usb | |
2762 | * voltage: vbus voltage | |
2763 | * Returns error code in case of failure else 0(on success) | |
2764 | */ | |
2765 | static int ab8500_charger_usb_get_property(struct power_supply *psy, | |
2766 | enum power_supply_property psp, | |
2767 | union power_supply_propval *val) | |
2768 | { | |
2769 | struct ab8500_charger *di; | |
a864c5a8 | 2770 | int ret; |
84edbeea AM |
2771 | |
2772 | di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy)); | |
2773 | ||
2774 | switch (psp) { | |
2775 | case POWER_SUPPLY_PROP_HEALTH: | |
2776 | if (di->flags.usbchargernotok) | |
2777 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
2778 | else if (di->ac.wd_expired || di->usb.wd_expired) | |
2779 | val->intval = POWER_SUPPLY_HEALTH_DEAD; | |
2780 | else if (di->flags.usb_thermal_prot) | |
2781 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
2782 | else if (di->flags.vbus_ovv) | |
2783 | val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
2784 | else | |
2785 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
2786 | break; | |
2787 | case POWER_SUPPLY_PROP_ONLINE: | |
2788 | val->intval = di->usb.charger_online; | |
2789 | break; | |
2790 | case POWER_SUPPLY_PROP_PRESENT: | |
2791 | val->intval = di->usb.charger_connected; | |
2792 | break; | |
2793 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a864c5a8 JA |
2794 | ret = ab8500_charger_get_vbus_voltage(di); |
2795 | if (ret >= 0) | |
2796 | di->usb.charger_voltage = ret; | |
84edbeea AM |
2797 | val->intval = di->usb.charger_voltage * 1000; |
2798 | break; | |
2799 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
2800 | /* | |
2801 | * This property is used to indicate when CV mode is entered | |
2802 | * for the USB charger | |
2803 | */ | |
2804 | di->usb.cv_active = ab8500_charger_usb_cv(di); | |
2805 | val->intval = di->usb.cv_active; | |
2806 | break; | |
2807 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
a864c5a8 JA |
2808 | ret = ab8500_charger_get_usb_current(di); |
2809 | if (ret >= 0) | |
2810 | di->usb.charger_current = ret; | |
2811 | val->intval = di->usb.charger_current * 1000; | |
84edbeea AM |
2812 | break; |
2813 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
2814 | /* | |
2815 | * This property is used to indicate when VBUS has collapsed | |
2816 | * due to too high output current from the USB charger | |
2817 | */ | |
2818 | if (di->flags.vbus_collapse) | |
2819 | val->intval = 1; | |
2820 | else | |
2821 | val->intval = 0; | |
2822 | break; | |
2823 | default: | |
2824 | return -EINVAL; | |
2825 | } | |
2826 | return 0; | |
2827 | } | |
2828 | ||
2829 | /** | |
2830 | * ab8500_charger_init_hw_registers() - Set up charger related registers | |
2831 | * @di: pointer to the ab8500_charger structure | |
2832 | * | |
2833 | * Set up charger OVV, watchdog and maximum voltage registers as well as | |
2834 | * charging of the backup battery | |
2835 | */ | |
2836 | static int ab8500_charger_init_hw_registers(struct ab8500_charger *di) | |
2837 | { | |
2838 | int ret = 0; | |
2839 | ||
2840 | /* Setup maximum charger current and voltage for ABB cut2.0 */ | |
2841 | if (!is_ab8500_1p1_or_earlier(di->parent)) { | |
2842 | ret = abx500_set_register_interruptible(di->dev, | |
2843 | AB8500_CHARGER, | |
2844 | AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6); | |
2845 | if (ret) { | |
2846 | dev_err(di->dev, | |
2847 | "failed to set CH_VOLT_LVL_MAX_REG\n"); | |
2848 | goto out; | |
2849 | } | |
2850 | ||
2851 | ret = abx500_set_register_interruptible(di->dev, | |
2852 | AB8500_CHARGER, | |
2853 | AB8500_CH_OPT_CRNTLVL_MAX_REG, CH_OP_CUR_LVL_1P6); | |
2854 | if (ret) { | |
2855 | dev_err(di->dev, | |
2856 | "failed to set CH_OPT_CRNTLVL_MAX_REG\n"); | |
2857 | goto out; | |
2858 | } | |
2859 | } | |
2860 | ||
0ed5107f JA |
2861 | if (is_ab9540_2p0(di->parent) || is_ab8505_2p0(di->parent)) |
2862 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
2863 | AB8500_CHARGER, | |
2864 | AB8500_USBCH_CTRL2_REG, | |
2865 | VBUS_AUTO_IN_CURR_LIM_ENA, | |
2866 | VBUS_AUTO_IN_CURR_LIM_ENA); | |
2867 | else | |
2868 | /* | |
2869 | * VBUS OVV set to 6.3V and enable automatic current limitation | |
2870 | */ | |
2871 | ret = abx500_set_register_interruptible(di->dev, | |
2872 | AB8500_CHARGER, | |
2873 | AB8500_USBCH_CTRL2_REG, | |
2874 | VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA); | |
84edbeea | 2875 | if (ret) { |
0ed5107f JA |
2876 | dev_err(di->dev, |
2877 | "failed to set automatic current limitation\n"); | |
84edbeea AM |
2878 | goto out; |
2879 | } | |
2880 | ||
2881 | /* Enable main watchdog in OTP */ | |
2882 | ret = abx500_set_register_interruptible(di->dev, | |
2883 | AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD); | |
2884 | if (ret) { | |
2885 | dev_err(di->dev, "failed to enable main WD in OTP\n"); | |
2886 | goto out; | |
2887 | } | |
2888 | ||
2889 | /* Enable main watchdog */ | |
2890 | ret = abx500_set_register_interruptible(di->dev, | |
2891 | AB8500_SYS_CTRL2_BLOCK, | |
2892 | AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA); | |
2893 | if (ret) { | |
2894 | dev_err(di->dev, "faile to enable main watchdog\n"); | |
2895 | goto out; | |
2896 | } | |
2897 | ||
2898 | /* | |
2899 | * Due to internal synchronisation, Enable and Kick watchdog bits | |
2900 | * cannot be enabled in a single write. | |
2901 | * A minimum delay of 2*32 kHz period (62.5µs) must be inserted | |
2902 | * between writing Enable then Kick bits. | |
2903 | */ | |
2904 | udelay(63); | |
2905 | ||
2906 | /* Kick main watchdog */ | |
2907 | ret = abx500_set_register_interruptible(di->dev, | |
2908 | AB8500_SYS_CTRL2_BLOCK, | |
2909 | AB8500_MAIN_WDOG_CTRL_REG, | |
2910 | (MAIN_WDOG_ENA | MAIN_WDOG_KICK)); | |
2911 | if (ret) { | |
2912 | dev_err(di->dev, "failed to kick main watchdog\n"); | |
2913 | goto out; | |
2914 | } | |
2915 | ||
2916 | /* Disable main watchdog */ | |
2917 | ret = abx500_set_register_interruptible(di->dev, | |
2918 | AB8500_SYS_CTRL2_BLOCK, | |
2919 | AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS); | |
2920 | if (ret) { | |
2921 | dev_err(di->dev, "failed to disable main watchdog\n"); | |
2922 | goto out; | |
2923 | } | |
2924 | ||
2925 | /* Set watchdog timeout */ | |
2926 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
2927 | AB8500_CH_WD_TIMER_REG, WD_TIMER); | |
2928 | if (ret) { | |
2929 | dev_err(di->dev, "failed to set charger watchdog timeout\n"); | |
2930 | goto out; | |
2931 | } | |
2932 | ||
34c11a70 POH |
2933 | /* Set charger watchdog timeout */ |
2934 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
2935 | AB8500_CH_WD_TIMER_REG, WD_TIMER); | |
2936 | if (ret) { | |
2937 | dev_err(di->dev, "failed to set charger watchdog timeout\n"); | |
2938 | goto out; | |
2939 | } | |
2940 | ||
2941 | ret = ab8500_charger_led_en(di, false); | |
2942 | if (ret < 0) { | |
2943 | dev_err(di->dev, "failed to disable LED\n"); | |
2944 | goto out; | |
2945 | } | |
2946 | ||
84edbeea AM |
2947 | /* Backup battery voltage and current */ |
2948 | ret = abx500_set_register_interruptible(di->dev, | |
2949 | AB8500_RTC, | |
2950 | AB8500_RTC_BACKUP_CHG_REG, | |
b0284de0 LJ |
2951 | di->bm->bkup_bat_v | |
2952 | di->bm->bkup_bat_i); | |
84edbeea AM |
2953 | if (ret) { |
2954 | dev_err(di->dev, "failed to setup backup battery charging\n"); | |
2955 | goto out; | |
2956 | } | |
2957 | ||
2958 | /* Enable backup battery charging */ | |
2959 | abx500_mask_and_set_register_interruptible(di->dev, | |
2960 | AB8500_RTC, AB8500_RTC_CTRL_REG, | |
2961 | RTC_BUP_CH_ENA, RTC_BUP_CH_ENA); | |
2962 | if (ret < 0) | |
2963 | dev_err(di->dev, "%s mask and set failed\n", __func__); | |
2964 | ||
2965 | out: | |
2966 | return ret; | |
2967 | } | |
2968 | ||
2969 | /* | |
2970 | * ab8500 charger driver interrupts and their respective isr | |
2971 | */ | |
2972 | static struct ab8500_charger_interrupts ab8500_charger_irq[] = { | |
2973 | {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler}, | |
2974 | {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler}, | |
2975 | {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler}, | |
2976 | {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler}, | |
2977 | {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler}, | |
2978 | {"VBUS_DET_F", ab8500_charger_vbusdetf_handler}, | |
2979 | {"VBUS_DET_R", ab8500_charger_vbusdetr_handler}, | |
2980 | {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler}, | |
2981 | {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler}, | |
2982 | {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler}, | |
2983 | {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler}, | |
2984 | {"VBUS_OVV", ab8500_charger_vbusovv_handler}, | |
2985 | {"CH_WD_EXP", ab8500_charger_chwdexp_handler}, | |
34c11a70 | 2986 | {"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler}, |
84edbeea AM |
2987 | }; |
2988 | ||
2989 | static int ab8500_charger_usb_notifier_call(struct notifier_block *nb, | |
2990 | unsigned long event, void *power) | |
2991 | { | |
2992 | struct ab8500_charger *di = | |
2993 | container_of(nb, struct ab8500_charger, nb); | |
2994 | enum ab8500_usb_state bm_usb_state; | |
2995 | unsigned mA = *((unsigned *)power); | |
2996 | ||
c9ade0fc LJ |
2997 | if (!di) |
2998 | return NOTIFY_DONE; | |
2999 | ||
84edbeea AM |
3000 | if (event != USB_EVENT_VBUS) { |
3001 | dev_dbg(di->dev, "not a standard host, returning\n"); | |
3002 | return NOTIFY_DONE; | |
3003 | } | |
3004 | ||
3005 | /* TODO: State is fabricate here. See if charger really needs USB | |
3006 | * state or if mA is enough | |
3007 | */ | |
3008 | if ((di->usb_state.usb_current == 2) && (mA > 2)) | |
3009 | bm_usb_state = AB8500_BM_USB_STATE_RESUME; | |
3010 | else if (mA == 0) | |
3011 | bm_usb_state = AB8500_BM_USB_STATE_RESET_HS; | |
3012 | else if (mA == 2) | |
3013 | bm_usb_state = AB8500_BM_USB_STATE_SUSPEND; | |
3014 | else if (mA >= 8) /* 8, 100, 500 */ | |
3015 | bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED; | |
3016 | else /* Should never occur */ | |
3017 | bm_usb_state = AB8500_BM_USB_STATE_RESET_FS; | |
3018 | ||
3019 | dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n", | |
3020 | __func__, bm_usb_state, mA); | |
3021 | ||
3022 | spin_lock(&di->usb_state.usb_lock); | |
34c11a70 POH |
3023 | di->usb_state.state_tmp = bm_usb_state; |
3024 | di->usb_state.usb_current_tmp = mA; | |
84edbeea AM |
3025 | spin_unlock(&di->usb_state.usb_lock); |
3026 | ||
34c11a70 POH |
3027 | /* |
3028 | * wait for some time until you get updates from the usb stack | |
3029 | * and negotiations are completed | |
3030 | */ | |
3031 | queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2); | |
84edbeea AM |
3032 | |
3033 | return NOTIFY_OK; | |
3034 | } | |
3035 | ||
3036 | #if defined(CONFIG_PM) | |
3037 | static int ab8500_charger_resume(struct platform_device *pdev) | |
3038 | { | |
3039 | int ret; | |
3040 | struct ab8500_charger *di = platform_get_drvdata(pdev); | |
3041 | ||
3042 | /* | |
3043 | * For ABB revision 1.0 and 1.1 there is a bug in the watchdog | |
3044 | * logic. That means we have to continously kick the charger | |
3045 | * watchdog even when no charger is connected. This is only | |
3046 | * valid once the AC charger has been enabled. This is | |
3047 | * a bug that is not handled by the algorithm and the | |
3048 | * watchdog have to be kicked by the charger driver | |
3049 | * when the AC charger is disabled | |
3050 | */ | |
3051 | if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) { | |
3052 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, | |
3053 | AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); | |
3054 | if (ret) | |
3055 | dev_err(di->dev, "Failed to kick WD!\n"); | |
3056 | ||
3057 | /* If not already pending start a new timer */ | |
3058 | if (!delayed_work_pending( | |
3059 | &di->kick_wd_work)) { | |
3060 | queue_delayed_work(di->charger_wq, &di->kick_wd_work, | |
3061 | round_jiffies(WD_KICK_INTERVAL)); | |
3062 | } | |
3063 | } | |
3064 | ||
3065 | /* If we still have a HW failure, schedule a new check */ | |
3066 | if (di->flags.mainextchnotok || di->flags.vbus_ovv) { | |
3067 | queue_delayed_work(di->charger_wq, | |
3068 | &di->check_hw_failure_work, 0); | |
3069 | } | |
3070 | ||
34c11a70 POH |
3071 | if (di->flags.vbus_drop_end) |
3072 | queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0); | |
3073 | ||
84edbeea AM |
3074 | return 0; |
3075 | } | |
3076 | ||
3077 | static int ab8500_charger_suspend(struct platform_device *pdev, | |
3078 | pm_message_t state) | |
3079 | { | |
3080 | struct ab8500_charger *di = platform_get_drvdata(pdev); | |
3081 | ||
3082 | /* Cancel any pending HW failure check */ | |
3083 | if (delayed_work_pending(&di->check_hw_failure_work)) | |
3084 | cancel_delayed_work(&di->check_hw_failure_work); | |
3085 | ||
34c11a70 POH |
3086 | if (delayed_work_pending(&di->vbus_drop_end_work)) |
3087 | cancel_delayed_work(&di->vbus_drop_end_work); | |
3088 | ||
53ef1f59 JA |
3089 | flush_delayed_work(&di->attach_work); |
3090 | flush_delayed_work(&di->usb_charger_attached_work); | |
3091 | flush_delayed_work(&di->ac_charger_attached_work); | |
3092 | flush_delayed_work(&di->check_usbchgnotok_work); | |
3093 | flush_delayed_work(&di->check_vbat_work); | |
3094 | flush_delayed_work(&di->kick_wd_work); | |
3095 | ||
3096 | flush_work(&di->usb_link_status_work); | |
3097 | flush_work(&di->ac_work); | |
3098 | flush_work(&di->detect_usb_type_work); | |
3099 | ||
34c11a70 POH |
3100 | if (atomic_read(&di->current_stepping_sessions)) |
3101 | return -EAGAIN; | |
3102 | ||
84edbeea AM |
3103 | return 0; |
3104 | } | |
3105 | #else | |
3106 | #define ab8500_charger_suspend NULL | |
3107 | #define ab8500_charger_resume NULL | |
3108 | #endif | |
3109 | ||
415ec69f | 3110 | static int ab8500_charger_remove(struct platform_device *pdev) |
84edbeea AM |
3111 | { |
3112 | struct ab8500_charger *di = platform_get_drvdata(pdev); | |
3113 | int i, irq, ret; | |
3114 | ||
3115 | /* Disable AC charging */ | |
3116 | ab8500_charger_ac_en(&di->ac_chg, false, 0, 0); | |
3117 | ||
3118 | /* Disable USB charging */ | |
3119 | ab8500_charger_usb_en(&di->usb_chg, false, 0, 0); | |
3120 | ||
3121 | /* Disable interrupts */ | |
3122 | for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) { | |
3123 | irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); | |
3124 | free_irq(irq, di); | |
3125 | } | |
3126 | ||
84edbeea AM |
3127 | /* Backup battery voltage and current disable */ |
3128 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
3129 | AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0); | |
3130 | if (ret < 0) | |
3131 | dev_err(di->dev, "%s mask and set failed\n", __func__); | |
3132 | ||
efd71c89 | 3133 | usb_unregister_notifier(di->usb_phy, &di->nb); |
721002ec | 3134 | usb_put_phy(di->usb_phy); |
84edbeea AM |
3135 | |
3136 | /* Delete the work queue */ | |
3137 | destroy_workqueue(di->charger_wq); | |
3138 | ||
3139 | flush_scheduled_work(); | |
01ec8c54 MJ |
3140 | if(di->usb_chg.enabled) |
3141 | power_supply_unregister(&di->usb_chg.psy); | |
34c11a70 | 3142 | #if !defined(CONFIG_CHARGER_PM2301) |
01ec8c54 MJ |
3143 | if(di->ac_chg.enabled) |
3144 | power_supply_unregister(&di->ac_chg.psy); | |
34c11a70 | 3145 | #endif |
84edbeea | 3146 | platform_set_drvdata(pdev, NULL); |
84edbeea AM |
3147 | |
3148 | return 0; | |
3149 | } | |
3150 | ||
4aef72db R |
3151 | static char *supply_interface[] = { |
3152 | "ab8500_chargalg", | |
3153 | "ab8500_fg", | |
3154 | "ab8500_btemp", | |
3155 | }; | |
3156 | ||
c8afa640 | 3157 | static int ab8500_charger_probe(struct platform_device *pdev) |
84edbeea | 3158 | { |
4aef72db | 3159 | struct device_node *np = pdev->dev.of_node; |
7722b799 | 3160 | struct abx500_bm_data *plat = pdev->dev.platform_data; |
2aac3de1 | 3161 | struct ab8500_charger *di; |
b269fff4 | 3162 | int irq, i, charger_status, ret = 0, ch_stat; |
84edbeea | 3163 | |
4aef72db R |
3164 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
3165 | if (!di) { | |
3166 | dev_err(&pdev->dev, "%s no mem for ab8500_charger\n", __func__); | |
84edbeea | 3167 | return -ENOMEM; |
4aef72db | 3168 | } |
7722b799 LJ |
3169 | |
3170 | if (!plat) { | |
3171 | dev_err(&pdev->dev, "no battery management data supplied\n"); | |
3172 | return -EINVAL; | |
3173 | } | |
3174 | di->bm = plat; | |
3175 | ||
3176 | if (np) { | |
3177 | ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm); | |
3178 | if (ret) { | |
3179 | dev_err(&pdev->dev, "failed to get battery information\n"); | |
3180 | return ret; | |
4aef72db | 3181 | } |
7722b799 LJ |
3182 | di->autopower_cfg = of_property_read_bool(np, "autopower_cfg"); |
3183 | } else | |
4aef72db | 3184 | di->autopower_cfg = false; |
84edbeea AM |
3185 | |
3186 | /* get parent data */ | |
3187 | di->dev = &pdev->dev; | |
3188 | di->parent = dev_get_drvdata(pdev->dev.parent); | |
3189 | di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0"); | |
3190 | ||
3191 | /* initialize lock */ | |
3192 | spin_lock_init(&di->usb_state.usb_lock); | |
34c11a70 | 3193 | mutex_init(&di->usb_ipt_crnt_lock); |
84edbeea | 3194 | |
84edbeea | 3195 | di->autopower = false; |
ff38090a | 3196 | di->invalid_charger_detect_state = 0; |
84edbeea AM |
3197 | |
3198 | /* AC supply */ | |
3199 | /* power_supply base class */ | |
3200 | di->ac_chg.psy.name = "ab8500_ac"; | |
3201 | di->ac_chg.psy.type = POWER_SUPPLY_TYPE_MAINS; | |
3202 | di->ac_chg.psy.properties = ab8500_charger_ac_props; | |
3203 | di->ac_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_ac_props); | |
3204 | di->ac_chg.psy.get_property = ab8500_charger_ac_get_property; | |
4aef72db R |
3205 | di->ac_chg.psy.supplied_to = supply_interface; |
3206 | di->ac_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface), | |
84edbeea AM |
3207 | /* ux500_charger sub-class */ |
3208 | di->ac_chg.ops.enable = &ab8500_charger_ac_en; | |
3209 | di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick; | |
3210 | di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current; | |
3211 | di->ac_chg.max_out_volt = ab8500_charger_voltage_map[ | |
3212 | ARRAY_SIZE(ab8500_charger_voltage_map) - 1]; | |
3213 | di->ac_chg.max_out_curr = ab8500_charger_current_map[ | |
3214 | ARRAY_SIZE(ab8500_charger_current_map) - 1]; | |
e07a5645 | 3215 | di->ac_chg.wdt_refresh = CHG_WD_INTERVAL; |
97034a1e | 3216 | di->ac_chg.enabled = di->bm->ac_enabled; |
e07a5645 | 3217 | di->ac_chg.external = false; |
84edbeea AM |
3218 | |
3219 | /* USB supply */ | |
3220 | /* power_supply base class */ | |
3221 | di->usb_chg.psy.name = "ab8500_usb"; | |
3222 | di->usb_chg.psy.type = POWER_SUPPLY_TYPE_USB; | |
3223 | di->usb_chg.psy.properties = ab8500_charger_usb_props; | |
3224 | di->usb_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_usb_props); | |
3225 | di->usb_chg.psy.get_property = ab8500_charger_usb_get_property; | |
4aef72db R |
3226 | di->usb_chg.psy.supplied_to = supply_interface; |
3227 | di->usb_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface), | |
84edbeea AM |
3228 | /* ux500_charger sub-class */ |
3229 | di->usb_chg.ops.enable = &ab8500_charger_usb_en; | |
3230 | di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick; | |
3231 | di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current; | |
3232 | di->usb_chg.max_out_volt = ab8500_charger_voltage_map[ | |
3233 | ARRAY_SIZE(ab8500_charger_voltage_map) - 1]; | |
3234 | di->usb_chg.max_out_curr = ab8500_charger_current_map[ | |
3235 | ARRAY_SIZE(ab8500_charger_current_map) - 1]; | |
e07a5645 | 3236 | di->usb_chg.wdt_refresh = CHG_WD_INTERVAL; |
97034a1e | 3237 | di->usb_chg.enabled = di->bm->usb_enabled; |
e07a5645 | 3238 | di->usb_chg.external = false; |
84edbeea AM |
3239 | |
3240 | /* Create a work queue for the charger */ | |
3241 | di->charger_wq = | |
3242 | create_singlethread_workqueue("ab8500_charger_wq"); | |
3243 | if (di->charger_wq == NULL) { | |
3244 | dev_err(di->dev, "failed to create work queue\n"); | |
4aef72db | 3245 | return -ENOMEM; |
84edbeea AM |
3246 | } |
3247 | ||
b269fff4 LJ |
3248 | mutex_init(&di->charger_attached_mutex); |
3249 | ||
84edbeea | 3250 | /* Init work for HW failure check */ |
203b42f7 | 3251 | INIT_DEFERRABLE_WORK(&di->check_hw_failure_work, |
84edbeea | 3252 | ab8500_charger_check_hw_failure_work); |
203b42f7 | 3253 | INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work, |
84edbeea AM |
3254 | ab8500_charger_check_usbchargernotok_work); |
3255 | ||
b269fff4 LJ |
3256 | INIT_DELAYED_WORK(&di->ac_charger_attached_work, |
3257 | ab8500_charger_ac_attached_work); | |
3258 | INIT_DELAYED_WORK(&di->usb_charger_attached_work, | |
3259 | ab8500_charger_usb_attached_work); | |
3260 | ||
84edbeea AM |
3261 | /* |
3262 | * For ABB revision 1.0 and 1.1 there is a bug in the watchdog | |
3263 | * logic. That means we have to continously kick the charger | |
3264 | * watchdog even when no charger is connected. This is only | |
3265 | * valid once the AC charger has been enabled. This is | |
3266 | * a bug that is not handled by the algorithm and the | |
3267 | * watchdog have to be kicked by the charger driver | |
3268 | * when the AC charger is disabled | |
3269 | */ | |
203b42f7 | 3270 | INIT_DEFERRABLE_WORK(&di->kick_wd_work, |
84edbeea AM |
3271 | ab8500_charger_kick_watchdog_work); |
3272 | ||
203b42f7 | 3273 | INIT_DEFERRABLE_WORK(&di->check_vbat_work, |
84edbeea AM |
3274 | ab8500_charger_check_vbat_work); |
3275 | ||
4b45f4a9 MC |
3276 | INIT_DELAYED_WORK(&di->attach_work, |
3277 | ab8500_charger_usb_link_attach_work); | |
3278 | ||
34c11a70 POH |
3279 | INIT_DELAYED_WORK(&di->usb_state_changed_work, |
3280 | ab8500_charger_usb_state_changed_work); | |
3281 | ||
3282 | INIT_DELAYED_WORK(&di->vbus_drop_end_work, | |
3283 | ab8500_charger_vbus_drop_end_work); | |
3284 | ||
84edbeea AM |
3285 | /* Init work for charger detection */ |
3286 | INIT_WORK(&di->usb_link_status_work, | |
3287 | ab8500_charger_usb_link_status_work); | |
3288 | INIT_WORK(&di->ac_work, ab8500_charger_ac_work); | |
3289 | INIT_WORK(&di->detect_usb_type_work, | |
3290 | ab8500_charger_detect_usb_type_work); | |
3291 | ||
84edbeea AM |
3292 | /* Init work for checking HW status */ |
3293 | INIT_WORK(&di->check_main_thermal_prot_work, | |
3294 | ab8500_charger_check_main_thermal_prot_work); | |
3295 | INIT_WORK(&di->check_usb_thermal_prot_work, | |
3296 | ab8500_charger_check_usb_thermal_prot_work); | |
3297 | ||
3298 | /* | |
3299 | * VDD ADC supply needs to be enabled from this driver when there | |
3300 | * is a charger connected to avoid erroneous BTEMP_HIGH/LOW | |
3301 | * interrupts during charging | |
3302 | */ | |
8feffd10 | 3303 | di->regu = devm_regulator_get(di->dev, "vddadc"); |
84edbeea AM |
3304 | if (IS_ERR(di->regu)) { |
3305 | ret = PTR_ERR(di->regu); | |
3306 | dev_err(di->dev, "failed to get vddadc regulator\n"); | |
3307 | goto free_charger_wq; | |
3308 | } | |
3309 | ||
3310 | ||
3311 | /* Initialize OVV, and other registers */ | |
3312 | ret = ab8500_charger_init_hw_registers(di); | |
3313 | if (ret) { | |
3314 | dev_err(di->dev, "failed to initialize ABB registers\n"); | |
8feffd10 | 3315 | goto free_charger_wq; |
84edbeea AM |
3316 | } |
3317 | ||
3318 | /* Register AC charger class */ | |
01ec8c54 MJ |
3319 | if(di->ac_chg.enabled) { |
3320 | ret = power_supply_register(di->dev, &di->ac_chg.psy); | |
3321 | if (ret) { | |
3322 | dev_err(di->dev, "failed to register AC charger\n"); | |
3323 | goto free_charger_wq; | |
3324 | } | |
84edbeea AM |
3325 | } |
3326 | ||
3327 | /* Register USB charger class */ | |
01ec8c54 MJ |
3328 | if(di->usb_chg.enabled) { |
3329 | ret = power_supply_register(di->dev, &di->usb_chg.psy); | |
3330 | if (ret) { | |
3331 | dev_err(di->dev, "failed to register USB charger\n"); | |
3332 | goto free_ac; | |
3333 | } | |
84edbeea AM |
3334 | } |
3335 | ||
662dca54 | 3336 | di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2); |
ded017ee | 3337 | if (IS_ERR_OR_NULL(di->usb_phy)) { |
efd71c89 | 3338 | dev_err(di->dev, "failed to get usb transceiver\n"); |
84edbeea AM |
3339 | ret = -EINVAL; |
3340 | goto free_usb; | |
3341 | } | |
3342 | di->nb.notifier_call = ab8500_charger_usb_notifier_call; | |
efd71c89 | 3343 | ret = usb_register_notifier(di->usb_phy, &di->nb); |
84edbeea | 3344 | if (ret) { |
efd71c89 AV |
3345 | dev_err(di->dev, "failed to register usb notifier\n"); |
3346 | goto put_usb_phy; | |
84edbeea AM |
3347 | } |
3348 | ||
3349 | /* Identify the connected charger types during startup */ | |
34c11a70 | 3350 | charger_status = ab8500_charger_detect_chargers(di, true); |
84edbeea AM |
3351 | if (charger_status & AC_PW_CONN) { |
3352 | di->ac.charger_connected = 1; | |
3353 | di->ac_conn = true; | |
3354 | ab8500_power_supply_changed(di, &di->ac_chg.psy); | |
3355 | sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present"); | |
3356 | } | |
3357 | ||
3358 | if (charger_status & USB_PW_CONN) { | |
84edbeea AM |
3359 | di->vbus_detected = true; |
3360 | di->vbus_detected_start = true; | |
3361 | queue_work(di->charger_wq, | |
3362 | &di->detect_usb_type_work); | |
3363 | } | |
3364 | ||
3365 | /* Register interrupts */ | |
3366 | for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) { | |
3367 | irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); | |
3368 | ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr, | |
3369 | IRQF_SHARED | IRQF_NO_SUSPEND, | |
3370 | ab8500_charger_irq[i].name, di); | |
3371 | ||
3372 | if (ret != 0) { | |
3373 | dev_err(di->dev, "failed to request %s IRQ %d: %d\n" | |
3374 | , ab8500_charger_irq[i].name, irq, ret); | |
3375 | goto free_irq; | |
3376 | } | |
3377 | dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", | |
3378 | ab8500_charger_irq[i].name, irq, ret); | |
3379 | } | |
3380 | ||
3381 | platform_set_drvdata(pdev, di); | |
3382 | ||
b269fff4 LJ |
3383 | mutex_lock(&di->charger_attached_mutex); |
3384 | ||
34c11a70 | 3385 | ch_stat = ab8500_charger_detect_chargers(di, false); |
b269fff4 LJ |
3386 | |
3387 | if ((ch_stat & AC_PW_CONN) == AC_PW_CONN) { | |
3388 | queue_delayed_work(di->charger_wq, | |
3389 | &di->ac_charger_attached_work, | |
3390 | HZ); | |
3391 | } | |
3392 | if ((ch_stat & USB_PW_CONN) == USB_PW_CONN) { | |
3393 | queue_delayed_work(di->charger_wq, | |
3394 | &di->usb_charger_attached_work, | |
3395 | HZ); | |
3396 | } | |
3397 | ||
3398 | mutex_unlock(&di->charger_attached_mutex); | |
3399 | ||
84edbeea AM |
3400 | return ret; |
3401 | ||
3402 | free_irq: | |
efd71c89 | 3403 | usb_unregister_notifier(di->usb_phy, &di->nb); |
84edbeea AM |
3404 | |
3405 | /* We also have to free all successfully registered irqs */ | |
3406 | for (i = i - 1; i >= 0; i--) { | |
3407 | irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); | |
3408 | free_irq(irq, di); | |
3409 | } | |
efd71c89 | 3410 | put_usb_phy: |
721002ec | 3411 | usb_put_phy(di->usb_phy); |
84edbeea | 3412 | free_usb: |
01ec8c54 MJ |
3413 | if(di->usb_chg.enabled) |
3414 | power_supply_unregister(&di->usb_chg.psy); | |
84edbeea | 3415 | free_ac: |
01ec8c54 MJ |
3416 | if(di->ac_chg.enabled) |
3417 | power_supply_unregister(&di->ac_chg.psy); | |
84edbeea AM |
3418 | free_charger_wq: |
3419 | destroy_workqueue(di->charger_wq); | |
84edbeea AM |
3420 | return ret; |
3421 | } | |
3422 | ||
4aef72db R |
3423 | static const struct of_device_id ab8500_charger_match[] = { |
3424 | { .compatible = "stericsson,ab8500-charger", }, | |
3425 | { }, | |
3426 | }; | |
3427 | ||
84edbeea AM |
3428 | static struct platform_driver ab8500_charger_driver = { |
3429 | .probe = ab8500_charger_probe, | |
28ea73f4 | 3430 | .remove = ab8500_charger_remove, |
84edbeea AM |
3431 | .suspend = ab8500_charger_suspend, |
3432 | .resume = ab8500_charger_resume, | |
3433 | .driver = { | |
3434 | .name = "ab8500-charger", | |
3435 | .owner = THIS_MODULE, | |
4aef72db | 3436 | .of_match_table = ab8500_charger_match, |
84edbeea AM |
3437 | }, |
3438 | }; | |
3439 | ||
3440 | static int __init ab8500_charger_init(void) | |
3441 | { | |
3442 | return platform_driver_register(&ab8500_charger_driver); | |
3443 | } | |
3444 | ||
3445 | static void __exit ab8500_charger_exit(void) | |
3446 | { | |
3447 | platform_driver_unregister(&ab8500_charger_driver); | |
3448 | } | |
3449 | ||
3450 | subsys_initcall_sync(ab8500_charger_init); | |
3451 | module_exit(ab8500_charger_exit); | |
3452 | ||
3453 | MODULE_LICENSE("GPL v2"); | |
3454 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy"); | |
3455 | MODULE_ALIAS("platform:ab8500-charger"); | |
3456 | MODULE_DESCRIPTION("AB8500 charger management driver"); |