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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> |
26 | #include <linux/of.h> |
27 | #include <linux/mfd/core.h> |
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> |
34 | #include <linux/mutex.h> |
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 |
58 | #define AUTO_VBUS_IN_CURR_LIM_SHIFT 4 |
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 | |
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 | |
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 | |
89 | /* Step up/down delay in us */ |
90 | #define STEP_UDELAY 1000 |
91 | |
92 | #define CHARGER_STATUS_POLL 10 /* in ms */ |
93 | |
94 | #define CHG_WD_INTERVAL (60 * HZ) |
95 | |
96 | #define AB8500_SW_CONTROL_FALLBACK 0x03 |
97 | /* Wait for enumeration before charing in us */ |
98 | #define WAIT_ACA_RID_ENUMERATION (5 * 1000) |
99 | |
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, |
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, |
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; |
177 | int charger_current; |
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; |
188 | bool vbus_drop_end; |
189 | }; |
190 | |
191 | struct ab8500_charger_usb_state { |
192 | int usb_current; |
193 | int usb_current_tmp; |
194 | enum ab8500_usb_state state; |
195 | enum ab8500_usb_state state_tmp; |
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 |
213 | * @usb_device_is_unrecognised USB device is unrecognised by the hardware |
214 | * @autopower Indicate if we should have automatic pwron after pwrloss |
215 | * @autopower_cfg platform specific power config support for "pwron after pwrloss" |
216 | * @invalid_charger_detect_state State when forcing AB to use invalid charger |
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 |
221 | * @parent: Pointer to the struct ab8500 |
222 | * @gpadc: Pointer to the struct gpadc |
223 | * @bm: Platform specific battery management information |
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 |
232 | * @usb_ipt_crnt_lock: Lock to protect VBUS input current setting from mutuals |
233 | * @pm_lock: Lock to prevent system to suspend |
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 |
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 |
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 |
247 | * @attach_work: Work for detecting USB type |
248 | * @vbus_drop_end_work: Work for detecting VBUS drop end |
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 |
253 | * @charger_attached_mutex: For controlling the wakelock |
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; |
265 | bool usb_device_is_unrecognised; |
266 | bool autopower; |
267 | bool autopower_cfg; |
268 | int invalid_charger_detect_state; |
269 | bool is_usb_host; |
270 | int is_aca_rid; |
271 | atomic_t current_stepping_sessions; |
272 | struct ab8500 *parent; |
273 | struct ab8500_gpadc *gpadc; |
274 | struct abx500_bm_data *bm; |
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; |
283 | struct mutex usb_ipt_crnt_lock; |
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; |
288 | struct delayed_work usb_state_changed_work; |
289 | struct delayed_work attach_work; |
290 | struct delayed_work ac_charger_attached_work; |
291 | struct delayed_work usb_charger_attached_work; |
292 | struct delayed_work vbus_drop_end_work; |
293 | struct work_struct ac_work; |
294 | struct work_struct detect_usb_type_work; |
295 | struct work_struct usb_link_status_work; |
296 | struct work_struct check_main_thermal_prot_work; |
297 | struct work_struct check_usb_thermal_prot_work; |
298 | struct usb_phy *usb_phy; |
299 | struct notifier_block nb; |
300 | struct mutex charger_attached_mutex; |
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 | |
324 | /* |
325 | * Function for enabling and disabling sw fallback mode |
326 | * should always be disabled when no charger is connected. |
327 | */ |
328 | static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di, |
329 | bool fallback) |
330 | { |
331 | u8 val; |
332 | u8 reg; |
333 | u8 bank; |
334 | u8 bit; |
335 | int ret; |
336 | |
337 | dev_dbg(di->dev, "SW Fallback: %d\n", fallback); |
338 | |
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 | |
349 | /* read the register containing fallback bit */ |
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__); |
353 | return; |
354 | } |
355 | |
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 | } |
363 | } |
364 | |
365 | if (fallback) |
366 | val |= (1 << bit); |
367 | else |
368 | val &= ~(1 << bit); |
369 | |
370 | /* write back the changed fallback bit value to register */ |
371 | ret = abx500_set_register_interruptible(di->dev, bank, reg, val); |
372 | if (ret) { |
373 | dev_err(di->dev, "%d write failed\n", __LINE__); |
374 | } |
375 | |
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 | } |
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 | { |
396 | if (di->autopower_cfg) { |
397 | if (!di->usb.charger_connected && |
398 | !di->ac.charger_connected && |
399 | di->autopower) { |
400 | di->autopower = false; |
401 | ab8500_enable_disable_sw_fallback(di, false); |
402 | } else if (!di->autopower && |
403 | (di->ac.charger_connected || |
404 | di->usb.charger_connected)) { |
405 | di->autopower = true; |
406 | ab8500_enable_disable_sw_fallback(di, true); |
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"); |
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 | } |
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 |
585 | * @probe: if probe, don't delay and wait for HW |
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 | */ |
599 | static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe) |
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 */ |
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 | } |
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 | } |
633 | dev_dbg(di->dev, |
634 | "%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__, |
635 | val); |
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, |
652 | enum ab8500_charger_link_status link_status) |
653 | { |
654 | int ret = 0; |
655 | |
656 | di->usb_device_is_unrecognised = false; |
657 | |
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 | |
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 " |
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; |
674 | break; |
675 | case USB_STAT_HOST_CHG_HS_CHIRP: |
676 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5; |
677 | di->is_usb_host = true; |
678 | di->is_aca_rid = 0; |
679 | break; |
680 | case USB_STAT_HOST_CHG_HS: |
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; |
685 | case USB_STAT_ACA_RID_C_HS: |
686 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P9; |
687 | di->is_usb_host = false; |
688 | di->is_aca_rid = 0; |
689 | break; |
690 | case USB_STAT_ACA_RID_A: |
691 | /* |
692 | * Dedicated charger level minus maximum current accessory |
693 | * can consume (900mA). Closest level is 500mA |
694 | */ |
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; |
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; |
706 | dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, |
707 | di->max_usb_in_curr); |
708 | di->is_usb_host = false; |
709 | di->is_aca_rid = 1; |
710 | break; |
711 | case USB_STAT_HOST_CHG_NM: |
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; |
716 | case USB_STAT_DEDICATED_CHG: |
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; |
721 | case USB_STAT_ACA_RID_C_HS_CHIRP: |
722 | case USB_STAT_ACA_RID_C_NM: |
723 | di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5; |
724 | di->is_usb_host = false; |
725 | di->is_aca_rid = 1; |
726 | break; |
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 | } |
734 | case USB_STAT_HM_IDGND: |
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; |
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); |
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; |
766 | break; |
767 | |
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 | } |
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 | } |
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); |
842 | dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n", |
843 | __func__, val); |
844 | if (ret < 0) { |
845 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
846 | return ret; |
847 | } |
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); |
855 | if (ret < 0) { |
856 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
857 | return ret; |
858 | } |
859 | dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__, |
860 | val); |
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 | |
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 | { |
1120 | int ret = 0; |
1121 | int auto_curr_index, curr_index, prev_curr_index, shift_value, i; |
1122 | u8 reg_value; |
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 | } |
1134 | |
1135 | switch (reg) { |
1136 | case AB8500_MCH_IPT_CURLVL_REG: |
1137 | shift_value = MAIN_CH_INPUT_CURR_SHIFT; |
1138 | prev_curr_index = (reg_value >> shift_value); |
1139 | curr_index = ab8500_current_to_regval(ich); |
1140 | step_udelay = STEP_UDELAY; |
1141 | if (!di->ac.charger_connected) |
1142 | no_stepping = true; |
1143 | break; |
1144 | case AB8500_USBCH_IPT_CRNTLVL_REG: |
1145 | shift_value = VBUS_IN_CURR_LIM_SHIFT; |
1146 | prev_curr_index = (reg_value >> shift_value); |
1147 | curr_index = ab8500_vbus_in_curr_to_regval(ich); |
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; |
1167 | break; |
1168 | case AB8500_CH_OPT_CRNTLVL_REG: |
1169 | shift_value = 0; |
1170 | prev_curr_index = (reg_value >> shift_value); |
1171 | curr_index = ab8500_current_to_regval(ich); |
1172 | step_udelay = STEP_UDELAY; |
1173 | if (curr_index && (curr_index - prev_curr_index) > 1) |
1174 | step_udelay *= 100; |
1175 | |
1176 | if (!di->usb.charger_connected && !di->ac.charger_connected) |
1177 | no_stepping = true; |
1178 | |
1179 | break; |
1180 | default: |
1181 | dev_err(di->dev, "%s current register not valid\n", __func__); |
1182 | ret = -ENXIO; |
1183 | goto exit_set_current; |
1184 | } |
1185 | |
1186 | if (curr_index < 0) { |
1187 | dev_err(di->dev, "requested current limit out-of-range\n"); |
1188 | ret = -ENXIO; |
1189 | goto exit_set_current; |
1190 | } |
1191 | |
1192 | /* only update current if it's been changed */ |
1193 | if (prev_curr_index == curr_index) { |
1194 | dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n", |
1195 | __func__, reg); |
1196 | ret = 0; |
1197 | goto exit_set_current; |
1198 | } |
1199 | |
1200 | dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n", |
1201 | __func__, ich, reg); |
1202 | |
1203 | if (no_stepping) { |
1204 | ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
1205 | reg, (u8)curr_index << shift_value); |
1206 | if (ret) |
1207 | dev_err(di->dev, "%s write failed\n", __func__); |
1208 | } else if (prev_curr_index > curr_index) { |
1209 | for (i = prev_curr_index - 1; i >= curr_index; i--) { |
1210 | dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n", |
1211 | (u8) i << shift_value, reg); |
1212 | ret = abx500_set_register_interruptible(di->dev, |
1213 | AB8500_CHARGER, reg, (u8)i << shift_value); |
1214 | if (ret) { |
1215 | dev_err(di->dev, "%s write failed\n", __func__); |
1216 | goto exit_set_current; |
1217 | } |
1218 | if (i != curr_index) |
1219 | usleep_range(step_udelay, step_udelay * 2); |
1220 | } |
1221 | } else { |
1222 | for (i = prev_curr_index + 1; i <= curr_index; i++) { |
1223 | dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n", |
1224 | (u8)i << shift_value, reg); |
1225 | ret = abx500_set_register_interruptible(di->dev, |
1226 | AB8500_CHARGER, reg, (u8)i << shift_value); |
1227 | if (ret) { |
1228 | dev_err(di->dev, "%s write failed\n", __func__); |
1229 | goto exit_set_current; |
1230 | } |
1231 | if (i != curr_index) |
1232 | usleep_range(step_udelay, step_udelay * 2); |
1233 | } |
1234 | } |
1235 | |
1236 | exit_set_current: |
1237 | atomic_dec(&di->current_stepping_sessions); |
1238 | |
1239 | return ret; |
1240 | } |
1241 | |
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 | { |
1253 | int min_value; |
1254 | int ret; |
1255 | |
1256 | /* We should always use to lowest current limit */ |
1257 | min_value = min(di->bm->chg_params->usb_curr_max, ich_in); |
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 | |
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, |
1276 | AB8500_USBCH_IPT_CRNTLVL_REG); |
1277 | mutex_unlock(&di->usb_ipt_crnt_lock); |
1278 | |
1279 | return ret; |
1280 | } |
1281 | |
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 | } |
1296 | |
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); |
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( |
1405 | di->bm->chg_params->ac_curr_max); |
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*/ |
1421 | ret = ab8500_charger_set_main_in_curr(di, |
1422 | di->bm->chg_params->ac_curr_max); |
1423 | if (ret) { |
1424 | dev_err(di->dev, "%s Failed to set MainChInputCurr\n", |
1425 | __func__); |
1426 | return ret; |
1427 | } |
1428 | /* ChOutputCurentLevel: protected output current */ |
1429 | ret = ab8500_charger_set_output_curr(di, iset); |
1430 | if (ret) { |
1431 | dev_err(di->dev, "%s " |
1432 | "Failed to set ChOutputCurentLevel\n", |
1433 | __func__); |
1434 | return ret; |
1435 | } |
1436 | |
1437 | /* Check if VBAT overshoot control should be enabled */ |
1438 | if (!di->bm->enable_overshoot) |
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 | |
1490 | ret = ab8500_charger_set_output_curr(di, 0); |
1491 | if (ret) { |
1492 | dev_err(di->dev, "%s " |
1493 | "Failed to set ChOutputCurentLevel\n", |
1494 | __func__); |
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 | } |
1590 | /* Check if VBAT overshoot control should be enabled */ |
1591 | if (!di->bm->enable_overshoot) |
1592 | overshoot = USB_CHG_NO_OVERSHOOT_ENA_N; |
1593 | |
1594 | /* Enable USB Charger */ |
1595 | dev_dbg(di->dev, |
1596 | "Enabling USB with write to AB8500_USBCH_CTRL1_REG\n"); |
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 | |
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 | |
1627 | queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ); |
1628 | |
1629 | } else { |
1630 | /* Disable USB charging */ |
1631 | dev_dbg(di->dev, "%s Disabled USB charging\n", __func__); |
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"); |
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 | } |
1650 | |
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 | } |
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; |
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 | |
1727 | ret = ab8500_charger_set_output_curr(di, ich_out); |
1728 | if (ret) { |
1729 | dev_err(di->dev, "%s " |
1730 | "Failed to set ChOutputCurentLevel\n", |
1731 | __func__); |
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 | */ |
1941 | ret = ab8500_charger_detect_chargers(di, false); |
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 | |
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 | |
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 | */ |
2040 | static void ab8500_charger_detect_usb_type_work(struct work_struct *work) |
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 | */ |
2052 | ret = ab8500_charger_detect_chargers(di, false); |
2053 | if (ret < 0) |
2054 | return; |
2055 | |
2056 | if (!(ret & USB_PW_CONN)) { |
2057 | dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__); |
2058 | di->vbus_detected = false; |
2059 | ab8500_charger_set_usb_connected(di, false); |
2060 | ab8500_power_supply_changed(di, &di->usb_chg.psy); |
2061 | } else { |
2062 | dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__); |
2063 | di->vbus_detected = true; |
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 { |
2073 | /* |
2074 | * For ABB cut2.0 and onwards we have an IRQ, |
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 | |
2094 | /** |
2095 | * ab8500_charger_usb_link_attach_work() - work to detect USB type |
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 | |
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 | { |
2125 | int detected_chargers; |
2126 | int ret; |
2127 | u8 val; |
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 | */ |
2137 | detected_chargers = ab8500_charger_detect_chargers(di, false); |
2138 | if (detected_chargers < 0) |
2139 | return; |
2140 | |
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)) { |
2186 | di->vbus_detected = false; |
2187 | ab8500_charger_set_usb_connected(di, false); |
2188 | ab8500_power_supply_changed(di, &di->usb_chg.psy); |
2189 | return; |
2190 | } |
2191 | |
2192 | dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__); |
2193 | di->vbus_detected = true; |
2194 | ret = ab8500_charger_read_usb_type(di); |
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); |
2200 | } |
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); |
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, |
2235 | struct ab8500_charger, usb_state_changed_work.work); |
2236 | |
2237 | if (!di->vbus_detected) { |
2238 | dev_dbg(di->dev, |
2239 | "%s !di->vbus_detected\n", |
2240 | __func__); |
2241 | return; |
2242 | } |
2243 | |
2244 | spin_lock_irqsave(&di->usb_state.usb_lock, flags); |
2245 | di->usb_state.state = di->usb_state.state_tmp; |
2246 | di->usb_state.usb_current = di->usb_state.usb_current_tmp; |
2247 | spin_unlock_irqrestore(&di->usb_state.usb_lock, flags); |
2248 | |
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 | |
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 | |
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 | |
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); |
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 | |
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 | |
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 | |
2516 | di->vbus_detected = false; |
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"); |
2536 | |
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 | |
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 | |
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; |
2703 | int ret; |
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: |
2725 | ret = ab8500_charger_get_ac_voltage(di); |
2726 | if (ret >= 0) |
2727 | di->ac.charger_voltage = ret; |
2728 | /* On error, use previous value */ |
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: |
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; |
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; |
2770 | int ret; |
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: |
2794 | ret = ab8500_charger_get_vbus_voltage(di); |
2795 | if (ret >= 0) |
2796 | di->usb.charger_voltage = ret; |
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: |
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; |
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 | |
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); |
2875 | if (ret) { |
2876 | dev_err(di->dev, |
2877 | "failed to set automatic current limitation\n"); |
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 | |
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 | |
2947 | /* Backup battery voltage and current */ |
2948 | ret = abx500_set_register_interruptible(di->dev, |
2949 | AB8500_RTC, |
2950 | AB8500_RTC_BACKUP_CHG_REG, |
2951 | di->bm->bkup_bat_v | |
2952 | di->bm->bkup_bat_i); |
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}, |
2986 | {"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler}, |
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 | |
2997 | if (!di) |
2998 | return NOTIFY_DONE; |
2999 | |
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); |
3023 | di->usb_state.state_tmp = bm_usb_state; |
3024 | di->usb_state.usb_current_tmp = mA; |
3025 | spin_unlock(&di->usb_state.usb_lock); |
3026 | |
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); |
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 | |
3071 | if (di->flags.vbus_drop_end) |
3072 | queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0); |
3073 | |
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 | |
3086 | if (delayed_work_pending(&di->vbus_drop_end_work)) |
3087 | cancel_delayed_work(&di->vbus_drop_end_work); |
3088 | |
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 | |
3100 | if (atomic_read(&di->current_stepping_sessions)) |
3101 | return -EAGAIN; |
3102 | |
3103 | return 0; |
3104 | } |
3105 | #else |
3106 | #define ab8500_charger_suspend NULL |
3107 | #define ab8500_charger_resume NULL |
3108 | #endif |
3109 | |
3110 | static int ab8500_charger_remove(struct platform_device *pdev) |
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 | |
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 | |
3133 | usb_unregister_notifier(di->usb_phy, &di->nb); |
3134 | usb_put_phy(di->usb_phy); |
3135 | |
3136 | /* Delete the work queue */ |
3137 | destroy_workqueue(di->charger_wq); |
3138 | |
3139 | flush_scheduled_work(); |
3140 | if(di->usb_chg.enabled) |
3141 | power_supply_unregister(&di->usb_chg.psy); |
3142 | #if !defined(CONFIG_CHARGER_PM2301) |
3143 | if(di->ac_chg.enabled) |
3144 | power_supply_unregister(&di->ac_chg.psy); |
3145 | #endif |
3146 | platform_set_drvdata(pdev, NULL); |
3147 | |
3148 | return 0; |
3149 | } |
3150 | |
3151 | static char *supply_interface[] = { |
3152 | "ab8500_chargalg", |
3153 | "ab8500_fg", |
3154 | "ab8500_btemp", |
3155 | }; |
3156 | |
3157 | static int ab8500_charger_probe(struct platform_device *pdev) |
3158 | { |
3159 | struct device_node *np = pdev->dev.of_node; |
3160 | struct abx500_bm_data *plat = pdev->dev.platform_data; |
3161 | struct ab8500_charger *di; |
3162 | int irq, i, charger_status, ret = 0, ch_stat; |
3163 | |
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__); |
3167 | return -ENOMEM; |
3168 | } |
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; |
3181 | } |
3182 | di->autopower_cfg = of_property_read_bool(np, "autopower_cfg"); |
3183 | } else |
3184 | di->autopower_cfg = false; |
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); |
3193 | mutex_init(&di->usb_ipt_crnt_lock); |
3194 | |
3195 | di->autopower = false; |
3196 | di->invalid_charger_detect_state = 0; |
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; |
3205 | di->ac_chg.psy.supplied_to = supply_interface; |
3206 | di->ac_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface), |
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]; |
3215 | di->ac_chg.wdt_refresh = CHG_WD_INTERVAL; |
3216 | di->ac_chg.enabled = di->bm->ac_enabled; |
3217 | di->ac_chg.external = false; |
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; |
3226 | di->usb_chg.psy.supplied_to = supply_interface; |
3227 | di->usb_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface), |
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]; |
3236 | di->usb_chg.wdt_refresh = CHG_WD_INTERVAL; |
3237 | di->usb_chg.enabled = di->bm->usb_enabled; |
3238 | di->usb_chg.external = false; |
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"); |
3245 | return -ENOMEM; |
3246 | } |
3247 | |
3248 | mutex_init(&di->charger_attached_mutex); |
3249 | |
3250 | /* Init work for HW failure check */ |
3251 | INIT_DEFERRABLE_WORK(&di->check_hw_failure_work, |
3252 | ab8500_charger_check_hw_failure_work); |
3253 | INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work, |
3254 | ab8500_charger_check_usbchargernotok_work); |
3255 | |
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 | |
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 | */ |
3270 | INIT_DEFERRABLE_WORK(&di->kick_wd_work, |
3271 | ab8500_charger_kick_watchdog_work); |
3272 | |
3273 | INIT_DEFERRABLE_WORK(&di->check_vbat_work, |
3274 | ab8500_charger_check_vbat_work); |
3275 | |
3276 | INIT_DELAYED_WORK(&di->attach_work, |
3277 | ab8500_charger_usb_link_attach_work); |
3278 | |
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 | |
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 | |
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 | */ |
3303 | di->regu = devm_regulator_get(di->dev, "vddadc"); |
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"); |
3315 | goto free_charger_wq; |
3316 | } |
3317 | |
3318 | /* Register AC charger class */ |
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 | } |
3325 | } |
3326 | |
3327 | /* Register USB charger class */ |
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 | } |
3334 | } |
3335 | |
3336 | di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2); |
3337 | if (IS_ERR_OR_NULL(di->usb_phy)) { |
3338 | dev_err(di->dev, "failed to get usb transceiver\n"); |
3339 | ret = -EINVAL; |
3340 | goto free_usb; |
3341 | } |
3342 | di->nb.notifier_call = ab8500_charger_usb_notifier_call; |
3343 | ret = usb_register_notifier(di->usb_phy, &di->nb); |
3344 | if (ret) { |
3345 | dev_err(di->dev, "failed to register usb notifier\n"); |
3346 | goto put_usb_phy; |
3347 | } |
3348 | |
3349 | /* Identify the connected charger types during startup */ |
3350 | charger_status = ab8500_charger_detect_chargers(di, true); |
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) { |
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 | |
3383 | mutex_lock(&di->charger_attached_mutex); |
3384 | |
3385 | ch_stat = ab8500_charger_detect_chargers(di, false); |
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 | |
3400 | return ret; |
3401 | |
3402 | free_irq: |
3403 | usb_unregister_notifier(di->usb_phy, &di->nb); |
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 | } |
3410 | put_usb_phy: |
3411 | usb_put_phy(di->usb_phy); |
3412 | free_usb: |
3413 | if(di->usb_chg.enabled) |
3414 | power_supply_unregister(&di->usb_chg.psy); |
3415 | free_ac: |
3416 | if(di->ac_chg.enabled) |
3417 | power_supply_unregister(&di->ac_chg.psy); |
3418 | free_charger_wq: |
3419 | destroy_workqueue(di->charger_wq); |
3420 | return ret; |
3421 | } |
3422 | |
3423 | static const struct of_device_id ab8500_charger_match[] = { |
3424 | { .compatible = "stericsson,ab8500-charger", }, |
3425 | { }, |
3426 | }; |
3427 | |
3428 | static struct platform_driver ab8500_charger_driver = { |
3429 | .probe = ab8500_charger_probe, |
3430 | .remove = ab8500_charger_remove, |
3431 | .suspend = ab8500_charger_suspend, |
3432 | .resume = ab8500_charger_resume, |
3433 | .driver = { |
3434 | .name = "ab8500-charger", |
3435 | .owner = THIS_MODULE, |
3436 | .of_match_table = ab8500_charger_match, |
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"); |
3457 |
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v2.6.34-rc5
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