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2e727f17 GI |
1 | /* |
2 | * TWL4030/TPS65950 BCI (Battery Charger Interface) driver | |
3 | * | |
4 | * Copyright (C) 2010 Gražvydas Ignotas <notasas@gmail.com> | |
5 | * | |
6 | * based on twl4030_bci_battery.c by TI | |
7 | * Copyright (C) 2008 Texas Instruments, Inc. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | */ | |
14 | ||
15 | #include <linux/init.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/slab.h> | |
ded017ee | 18 | #include <linux/err.h> |
2e727f17 GI |
19 | #include <linux/platform_device.h> |
20 | #include <linux/interrupt.h> | |
21 | #include <linux/i2c/twl.h> | |
22 | #include <linux/power_supply.h> | |
23 | #include <linux/notifier.h> | |
24 | #include <linux/usb/otg.h> | |
25 | ||
26 | #define TWL4030_BCIMSTATEC 0x02 | |
27 | #define TWL4030_BCIICHG 0x08 | |
28 | #define TWL4030_BCIVAC 0x0a | |
29 | #define TWL4030_BCIVBUS 0x0c | |
61a7784e | 30 | #define TWL4030_BCIMFSTS3 0x0F |
2e727f17 GI |
31 | #define TWL4030_BCIMFSTS4 0x10 |
32 | #define TWL4030_BCICTL1 0x23 | |
210d4bc8 | 33 | #define TWL4030_BB_CFG 0x12 |
2e727f17 | 34 | |
61a7784e NM |
35 | #define TWL4030_BCIMFSTS1 0x01 |
36 | ||
2e727f17 GI |
37 | #define TWL4030_BCIAUTOWEN BIT(5) |
38 | #define TWL4030_CONFIG_DONE BIT(4) | |
39 | #define TWL4030_BCIAUTOUSB BIT(1) | |
40 | #define TWL4030_BCIAUTOAC BIT(0) | |
41 | #define TWL4030_CGAIN BIT(5) | |
42 | #define TWL4030_USBFASTMCHG BIT(2) | |
43 | #define TWL4030_STS_VBUS BIT(7) | |
44 | #define TWL4030_STS_USB_ID BIT(2) | |
210d4bc8 | 45 | #define TWL4030_BBCHEN BIT(4) |
94b05cab IH |
46 | #define TWL4030_BBSEL_MASK 0x0c |
47 | #define TWL4030_BBSEL_2V5 0x00 | |
48 | #define TWL4030_BBSEL_3V0 0x04 | |
49 | #define TWL4030_BBSEL_3V1 0x08 | |
50 | #define TWL4030_BBSEL_3V2 0x0c | |
51 | #define TWL4030_BBISEL_MASK 0x03 | |
52 | #define TWL4030_BBISEL_25uA 0x00 | |
53 | #define TWL4030_BBISEL_150uA 0x01 | |
54 | #define TWL4030_BBISEL_500uA 0x02 | |
55 | #define TWL4030_BBISEL_1000uA 0x03 | |
2e727f17 | 56 | |
61a7784e NM |
57 | #define TWL4030_BATSTSPCHG BIT(2) |
58 | #define TWL4030_BATSTSMCHG BIT(6) | |
59 | ||
2e727f17 GI |
60 | /* BCI interrupts */ |
61 | #define TWL4030_WOVF BIT(0) /* Watchdog overflow */ | |
62 | #define TWL4030_TMOVF BIT(1) /* Timer overflow */ | |
63 | #define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */ | |
64 | #define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */ | |
65 | #define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */ | |
66 | #define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */ | |
67 | #define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */ | |
68 | #define TWL4030_BATSTS BIT(7) /* Battery status */ | |
69 | ||
70 | #define TWL4030_VBATLVL BIT(0) /* VBAT level */ | |
71 | #define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */ | |
72 | #define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */ | |
73 | #define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */ | |
74 | ||
75 | #define TWL4030_MSTATEC_USB BIT(4) | |
76 | #define TWL4030_MSTATEC_AC BIT(5) | |
77 | #define TWL4030_MSTATEC_MASK 0x0f | |
78 | #define TWL4030_MSTATEC_QUICK1 0x02 | |
79 | #define TWL4030_MSTATEC_QUICK7 0x07 | |
80 | #define TWL4030_MSTATEC_COMPLETE1 0x0b | |
81 | #define TWL4030_MSTATEC_COMPLETE4 0x0e | |
82 | ||
83 | static bool allow_usb; | |
28d48f04 | 84 | module_param(allow_usb, bool, 0644); |
2e727f17 GI |
85 | MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current"); |
86 | ||
87 | struct twl4030_bci { | |
88 | struct device *dev; | |
297d716f KK |
89 | struct power_supply *ac; |
90 | struct power_supply *usb; | |
86753811 | 91 | struct usb_phy *transceiver; |
fcc8ebc9 | 92 | struct notifier_block usb_nb; |
d6ccc442 | 93 | struct work_struct work; |
2e727f17 GI |
94 | int irq_chg; |
95 | int irq_bci; | |
ab37813f | 96 | int usb_enabled; |
d6ccc442 HK |
97 | |
98 | unsigned long event; | |
2e727f17 GI |
99 | }; |
100 | ||
101 | /* | |
102 | * clear and set bits on an given register on a given module | |
103 | */ | |
104 | static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg) | |
105 | { | |
106 | u8 val = 0; | |
107 | int ret; | |
108 | ||
109 | ret = twl_i2c_read_u8(mod_no, &val, reg); | |
110 | if (ret) | |
111 | return ret; | |
112 | ||
113 | val &= ~clear; | |
114 | val |= set; | |
115 | ||
116 | return twl_i2c_write_u8(mod_no, val, reg); | |
117 | } | |
118 | ||
119 | static int twl4030_bci_read(u8 reg, u8 *val) | |
120 | { | |
e9f14c18 | 121 | return twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, val, reg); |
2e727f17 GI |
122 | } |
123 | ||
124 | static int twl4030_clear_set_boot_bci(u8 clear, u8 set) | |
125 | { | |
e9f14c18 | 126 | return twl4030_clear_set(TWL_MODULE_PM_MASTER, clear, |
2e727f17 GI |
127 | TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set, |
128 | TWL4030_PM_MASTER_BOOT_BCI); | |
129 | } | |
130 | ||
131 | static int twl4030bci_read_adc_val(u8 reg) | |
132 | { | |
133 | int ret, temp; | |
134 | u8 val; | |
135 | ||
136 | /* read MSB */ | |
137 | ret = twl4030_bci_read(reg + 1, &val); | |
138 | if (ret) | |
139 | return ret; | |
140 | ||
141 | temp = (int)(val & 0x03) << 8; | |
142 | ||
143 | /* read LSB */ | |
144 | ret = twl4030_bci_read(reg, &val); | |
145 | if (ret) | |
146 | return ret; | |
147 | ||
148 | return temp | val; | |
149 | } | |
150 | ||
61a7784e NM |
151 | /* |
152 | * Check if Battery Pack was present | |
153 | */ | |
154 | static int twl4030_is_battery_present(struct twl4030_bci *bci) | |
155 | { | |
156 | int ret; | |
157 | u8 val = 0; | |
158 | ||
159 | /* Battery presence in Main charge? */ | |
160 | ret = twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, &val, TWL4030_BCIMFSTS3); | |
161 | if (ret) | |
162 | return ret; | |
163 | if (val & TWL4030_BATSTSMCHG) | |
164 | return 0; | |
165 | ||
166 | /* | |
167 | * OK, It could be that bootloader did not enable main charger, | |
168 | * pre-charge is h/w auto. So, Battery presence in Pre-charge? | |
169 | */ | |
170 | ret = twl_i2c_read_u8(TWL4030_MODULE_PRECHARGE, &val, | |
171 | TWL4030_BCIMFSTS1); | |
172 | if (ret) | |
173 | return ret; | |
174 | if (val & TWL4030_BATSTSPCHG) | |
175 | return 0; | |
176 | ||
177 | return -ENODEV; | |
178 | } | |
179 | ||
2e727f17 GI |
180 | /* |
181 | * Check if VBUS power is present | |
182 | */ | |
183 | static int twl4030_bci_have_vbus(struct twl4030_bci *bci) | |
184 | { | |
185 | int ret; | |
186 | u8 hwsts; | |
187 | ||
e9f14c18 | 188 | ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &hwsts, |
2e727f17 GI |
189 | TWL4030_PM_MASTER_STS_HW_CONDITIONS); |
190 | if (ret < 0) | |
191 | return 0; | |
192 | ||
193 | dev_dbg(bci->dev, "check_vbus: HW_CONDITIONS %02x\n", hwsts); | |
194 | ||
195 | /* in case we also have STS_USB_ID, VBUS is driven by TWL itself */ | |
196 | if ((hwsts & TWL4030_STS_VBUS) && !(hwsts & TWL4030_STS_USB_ID)) | |
197 | return 1; | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | /* | |
9c645d2f | 203 | * Enable/Disable USB Charge functionality. |
2e727f17 GI |
204 | */ |
205 | static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) | |
206 | { | |
207 | int ret; | |
208 | ||
e57c4a67 | 209 | if (enable && !IS_ERR_OR_NULL(bci->transceiver)) { |
9c645d2f | 210 | /* Check for USB charger connected */ |
2e727f17 GI |
211 | if (!twl4030_bci_have_vbus(bci)) |
212 | return -ENODEV; | |
213 | ||
214 | /* | |
215 | * Until we can find out what current the device can provide, | |
216 | * require a module param to enable USB charging. | |
217 | */ | |
218 | if (!allow_usb) { | |
219 | dev_warn(bci->dev, "USB charging is disabled.\n"); | |
220 | return -EACCES; | |
221 | } | |
222 | ||
e57c4a67 | 223 | /* Need to keep phy powered */ |
ab37813f | 224 | if (!bci->usb_enabled) { |
e57c4a67 | 225 | pm_runtime_get_sync(bci->transceiver->dev); |
ab37813f N |
226 | bci->usb_enabled = 1; |
227 | } | |
228 | ||
2e727f17 GI |
229 | /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */ |
230 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB); | |
231 | if (ret < 0) | |
232 | return ret; | |
233 | ||
234 | /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */ | |
e9f14c18 | 235 | ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0, |
2e727f17 GI |
236 | TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4); |
237 | } else { | |
238 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0); | |
ab37813f | 239 | if (bci->usb_enabled) { |
e57c4a67 N |
240 | pm_runtime_mark_last_busy(bci->transceiver->dev); |
241 | pm_runtime_put_autosuspend(bci->transceiver->dev); | |
ab37813f N |
242 | bci->usb_enabled = 0; |
243 | } | |
2e727f17 GI |
244 | } |
245 | ||
246 | return ret; | |
247 | } | |
248 | ||
249 | /* | |
250 | * Enable/Disable AC Charge funtionality. | |
251 | */ | |
252 | static int twl4030_charger_enable_ac(bool enable) | |
253 | { | |
254 | int ret; | |
255 | ||
256 | if (enable) | |
257 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC); | |
258 | else | |
259 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0); | |
260 | ||
261 | return ret; | |
262 | } | |
263 | ||
210d4bc8 N |
264 | /* |
265 | * Enable/Disable charging of Backup Battery. | |
266 | */ | |
267 | static int twl4030_charger_enable_backup(int uvolt, int uamp) | |
268 | { | |
269 | int ret; | |
270 | u8 flags; | |
271 | ||
272 | if (uvolt < 2500000 || | |
273 | uamp < 25) { | |
274 | /* disable charging of backup battery */ | |
e9f14c18 | 275 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
210d4bc8 N |
276 | TWL4030_BBCHEN, 0, TWL4030_BB_CFG); |
277 | return ret; | |
278 | } | |
279 | ||
280 | flags = TWL4030_BBCHEN; | |
281 | if (uvolt >= 3200000) | |
282 | flags |= TWL4030_BBSEL_3V2; | |
283 | else if (uvolt >= 3100000) | |
284 | flags |= TWL4030_BBSEL_3V1; | |
285 | else if (uvolt >= 3000000) | |
286 | flags |= TWL4030_BBSEL_3V0; | |
287 | else | |
288 | flags |= TWL4030_BBSEL_2V5; | |
289 | ||
290 | if (uamp >= 1000) | |
291 | flags |= TWL4030_BBISEL_1000uA; | |
292 | else if (uamp >= 500) | |
293 | flags |= TWL4030_BBISEL_500uA; | |
294 | else if (uamp >= 150) | |
295 | flags |= TWL4030_BBISEL_150uA; | |
296 | else | |
297 | flags |= TWL4030_BBISEL_25uA; | |
298 | ||
e9f14c18 | 299 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
210d4bc8 N |
300 | TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK, |
301 | flags, | |
302 | TWL4030_BB_CFG); | |
303 | ||
304 | return ret; | |
305 | } | |
306 | ||
2e727f17 GI |
307 | /* |
308 | * TWL4030 CHG_PRES (AC charger presence) events | |
309 | */ | |
310 | static irqreturn_t twl4030_charger_interrupt(int irq, void *arg) | |
311 | { | |
312 | struct twl4030_bci *bci = arg; | |
313 | ||
314 | dev_dbg(bci->dev, "CHG_PRES irq\n"); | |
297d716f KK |
315 | power_supply_changed(bci->ac); |
316 | power_supply_changed(bci->usb); | |
2e727f17 GI |
317 | |
318 | return IRQ_HANDLED; | |
319 | } | |
320 | ||
321 | /* | |
322 | * TWL4030 BCI monitoring events | |
323 | */ | |
324 | static irqreturn_t twl4030_bci_interrupt(int irq, void *arg) | |
325 | { | |
326 | struct twl4030_bci *bci = arg; | |
327 | u8 irqs1, irqs2; | |
328 | int ret; | |
329 | ||
330 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1, | |
331 | TWL4030_INTERRUPTS_BCIISR1A); | |
332 | if (ret < 0) | |
333 | return IRQ_HANDLED; | |
334 | ||
335 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2, | |
336 | TWL4030_INTERRUPTS_BCIISR2A); | |
337 | if (ret < 0) | |
338 | return IRQ_HANDLED; | |
339 | ||
340 | dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1); | |
341 | ||
342 | if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) { | |
343 | /* charger state change, inform the core */ | |
297d716f KK |
344 | power_supply_changed(bci->ac); |
345 | power_supply_changed(bci->usb); | |
2e727f17 GI |
346 | } |
347 | ||
348 | /* various monitoring events, for now we just log them here */ | |
349 | if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1)) | |
350 | dev_warn(bci->dev, "battery temperature out of range\n"); | |
351 | ||
352 | if (irqs1 & TWL4030_BATSTS) | |
353 | dev_crit(bci->dev, "battery disconnected\n"); | |
354 | ||
355 | if (irqs2 & TWL4030_VBATOV) | |
356 | dev_crit(bci->dev, "VBAT overvoltage\n"); | |
357 | ||
358 | if (irqs2 & TWL4030_VBUSOV) | |
359 | dev_crit(bci->dev, "VBUS overvoltage\n"); | |
360 | ||
361 | if (irqs2 & TWL4030_ACCHGOV) | |
362 | dev_crit(bci->dev, "Ac charger overvoltage\n"); | |
363 | ||
364 | return IRQ_HANDLED; | |
365 | } | |
366 | ||
d6ccc442 | 367 | static void twl4030_bci_usb_work(struct work_struct *data) |
2e727f17 | 368 | { |
d6ccc442 | 369 | struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work); |
2e727f17 | 370 | |
d6ccc442 | 371 | switch (bci->event) { |
2e727f17 GI |
372 | case USB_EVENT_VBUS: |
373 | case USB_EVENT_CHARGER: | |
374 | twl4030_charger_enable_usb(bci, true); | |
375 | break; | |
376 | case USB_EVENT_NONE: | |
377 | twl4030_charger_enable_usb(bci, false); | |
378 | break; | |
379 | } | |
d6ccc442 HK |
380 | } |
381 | ||
382 | static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val, | |
383 | void *priv) | |
384 | { | |
fcc8ebc9 | 385 | struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, usb_nb); |
d6ccc442 HK |
386 | |
387 | dev_dbg(bci->dev, "OTG notify %lu\n", val); | |
388 | ||
389 | bci->event = val; | |
390 | schedule_work(&bci->work); | |
2e727f17 GI |
391 | |
392 | return NOTIFY_OK; | |
393 | } | |
394 | ||
395 | /* | |
396 | * TI provided formulas: | |
397 | * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85 | |
398 | * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7 | |
399 | * Here we use integer approximation of: | |
400 | * CGAIN == 0: val * 1.6618 - 0.85 | |
401 | * CGAIN == 1: (val * 1.6618 - 0.85) * 2 | |
402 | */ | |
403 | static int twl4030_charger_get_current(void) | |
404 | { | |
405 | int curr; | |
406 | int ret; | |
407 | u8 bcictl1; | |
408 | ||
409 | curr = twl4030bci_read_adc_val(TWL4030_BCIICHG); | |
410 | if (curr < 0) | |
411 | return curr; | |
412 | ||
413 | ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); | |
414 | if (ret) | |
415 | return ret; | |
416 | ||
417 | ret = (curr * 16618 - 850 * 10000) / 10; | |
418 | if (bcictl1 & TWL4030_CGAIN) | |
419 | ret *= 2; | |
420 | ||
421 | return ret; | |
422 | } | |
423 | ||
424 | /* | |
425 | * Returns the main charge FSM state | |
426 | * Or < 0 on failure. | |
427 | */ | |
428 | static int twl4030bci_state(struct twl4030_bci *bci) | |
429 | { | |
430 | int ret; | |
431 | u8 state; | |
432 | ||
433 | ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state); | |
434 | if (ret) { | |
435 | pr_err("twl4030_bci: error reading BCIMSTATEC\n"); | |
436 | return ret; | |
437 | } | |
438 | ||
439 | dev_dbg(bci->dev, "state: %02x\n", state); | |
440 | ||
441 | return state; | |
442 | } | |
443 | ||
444 | static int twl4030_bci_state_to_status(int state) | |
445 | { | |
446 | state &= TWL4030_MSTATEC_MASK; | |
447 | if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7) | |
448 | return POWER_SUPPLY_STATUS_CHARGING; | |
449 | else if (TWL4030_MSTATEC_COMPLETE1 <= state && | |
450 | state <= TWL4030_MSTATEC_COMPLETE4) | |
451 | return POWER_SUPPLY_STATUS_FULL; | |
452 | else | |
453 | return POWER_SUPPLY_STATUS_NOT_CHARGING; | |
454 | } | |
455 | ||
456 | static int twl4030_bci_get_property(struct power_supply *psy, | |
457 | enum power_supply_property psp, | |
458 | union power_supply_propval *val) | |
459 | { | |
297d716f | 460 | struct twl4030_bci *bci = dev_get_drvdata(psy->dev.parent); |
2e727f17 GI |
461 | int is_charging; |
462 | int state; | |
463 | int ret; | |
464 | ||
465 | state = twl4030bci_state(bci); | |
466 | if (state < 0) | |
467 | return state; | |
468 | ||
297d716f | 469 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) |
2e727f17 GI |
470 | is_charging = state & TWL4030_MSTATEC_USB; |
471 | else | |
472 | is_charging = state & TWL4030_MSTATEC_AC; | |
473 | ||
474 | switch (psp) { | |
475 | case POWER_SUPPLY_PROP_STATUS: | |
476 | if (is_charging) | |
477 | val->intval = twl4030_bci_state_to_status(state); | |
478 | else | |
479 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
480 | break; | |
481 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
482 | /* charging must be active for meaningful result */ | |
483 | if (!is_charging) | |
484 | return -ENODATA; | |
297d716f | 485 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) { |
2e727f17 GI |
486 | ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS); |
487 | if (ret < 0) | |
488 | return ret; | |
489 | /* BCIVBUS uses ADCIN8, 7/1023 V/step */ | |
490 | val->intval = ret * 6843; | |
491 | } else { | |
492 | ret = twl4030bci_read_adc_val(TWL4030_BCIVAC); | |
493 | if (ret < 0) | |
494 | return ret; | |
495 | /* BCIVAC uses ADCIN11, 10/1023 V/step */ | |
496 | val->intval = ret * 9775; | |
497 | } | |
498 | break; | |
499 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
500 | if (!is_charging) | |
501 | return -ENODATA; | |
502 | /* current measurement is shared between AC and USB */ | |
503 | ret = twl4030_charger_get_current(); | |
504 | if (ret < 0) | |
505 | return ret; | |
506 | val->intval = ret; | |
507 | break; | |
508 | case POWER_SUPPLY_PROP_ONLINE: | |
509 | val->intval = is_charging && | |
510 | twl4030_bci_state_to_status(state) != | |
511 | POWER_SUPPLY_STATUS_NOT_CHARGING; | |
512 | break; | |
513 | default: | |
514 | return -EINVAL; | |
515 | } | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
520 | static enum power_supply_property twl4030_charger_props[] = { | |
521 | POWER_SUPPLY_PROP_STATUS, | |
522 | POWER_SUPPLY_PROP_ONLINE, | |
523 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
524 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
525 | }; | |
526 | ||
ec0b3802 N |
527 | #ifdef CONFIG_OF |
528 | static const struct twl4030_bci_platform_data * | |
529 | twl4030_bci_parse_dt(struct device *dev) | |
530 | { | |
531 | struct device_node *np = dev->of_node; | |
532 | struct twl4030_bci_platform_data *pdata; | |
533 | u32 num; | |
534 | ||
535 | if (!np) | |
536 | return NULL; | |
537 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
538 | if (!pdata) | |
539 | return pdata; | |
540 | ||
541 | if (of_property_read_u32(np, "ti,bb-uvolt", &num) == 0) | |
542 | pdata->bb_uvolt = num; | |
543 | if (of_property_read_u32(np, "ti,bb-uamp", &num) == 0) | |
544 | pdata->bb_uamp = num; | |
545 | return pdata; | |
546 | } | |
547 | #else | |
548 | static inline const struct twl4030_bci_platform_data * | |
549 | twl4030_bci_parse_dt(struct device *dev) | |
550 | { | |
551 | return NULL; | |
552 | } | |
553 | #endif | |
554 | ||
297d716f KK |
555 | static const struct power_supply_desc twl4030_bci_ac_desc = { |
556 | .name = "twl4030_ac", | |
557 | .type = POWER_SUPPLY_TYPE_MAINS, | |
558 | .properties = twl4030_charger_props, | |
559 | .num_properties = ARRAY_SIZE(twl4030_charger_props), | |
560 | .get_property = twl4030_bci_get_property, | |
561 | }; | |
562 | ||
563 | static const struct power_supply_desc twl4030_bci_usb_desc = { | |
564 | .name = "twl4030_usb", | |
565 | .type = POWER_SUPPLY_TYPE_USB, | |
566 | .properties = twl4030_charger_props, | |
567 | .num_properties = ARRAY_SIZE(twl4030_charger_props), | |
568 | .get_property = twl4030_bci_get_property, | |
569 | }; | |
570 | ||
7396f708 | 571 | static int twl4030_bci_probe(struct platform_device *pdev) |
2e727f17 GI |
572 | { |
573 | struct twl4030_bci *bci; | |
ec0b3802 | 574 | const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data; |
2e727f17 | 575 | int ret; |
28d48f04 | 576 | u32 reg; |
2e727f17 | 577 | |
325b50aa | 578 | bci = devm_kzalloc(&pdev->dev, sizeof(*bci), GFP_KERNEL); |
2e727f17 GI |
579 | if (bci == NULL) |
580 | return -ENOMEM; | |
581 | ||
ec0b3802 N |
582 | if (!pdata) |
583 | pdata = twl4030_bci_parse_dt(&pdev->dev); | |
584 | ||
2e727f17 GI |
585 | bci->dev = &pdev->dev; |
586 | bci->irq_chg = platform_get_irq(pdev, 0); | |
587 | bci->irq_bci = platform_get_irq(pdev, 1); | |
588 | ||
61a7784e NM |
589 | /* Only proceed further *IF* battery is physically present */ |
590 | ret = twl4030_is_battery_present(bci); | |
591 | if (ret) { | |
592 | dev_crit(&pdev->dev, "Battery was not detected:%d\n", ret); | |
325b50aa | 593 | return ret; |
61a7784e | 594 | } |
2e727f17 | 595 | |
61a7784e | 596 | platform_set_drvdata(pdev, bci); |
2e727f17 | 597 | |
325b50aa N |
598 | bci->ac = devm_power_supply_register(&pdev->dev, &twl4030_bci_ac_desc, |
599 | NULL); | |
297d716f KK |
600 | if (IS_ERR(bci->ac)) { |
601 | ret = PTR_ERR(bci->ac); | |
2e727f17 | 602 | dev_err(&pdev->dev, "failed to register ac: %d\n", ret); |
325b50aa | 603 | return ret; |
2e727f17 GI |
604 | } |
605 | ||
325b50aa N |
606 | bci->usb = devm_power_supply_register(&pdev->dev, &twl4030_bci_usb_desc, |
607 | NULL); | |
297d716f KK |
608 | if (IS_ERR(bci->usb)) { |
609 | ret = PTR_ERR(bci->usb); | |
2e727f17 | 610 | dev_err(&pdev->dev, "failed to register usb: %d\n", ret); |
325b50aa | 611 | return ret; |
2e727f17 GI |
612 | } |
613 | ||
1b7cac23 | 614 | ret = devm_request_threaded_irq(&pdev->dev, bci->irq_chg, NULL, |
a2778b0f FW |
615 | twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name, |
616 | bci); | |
2e727f17 GI |
617 | if (ret < 0) { |
618 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", | |
619 | bci->irq_chg, ret); | |
325b50aa | 620 | return ret; |
2e727f17 GI |
621 | } |
622 | ||
1b7cac23 | 623 | ret = devm_request_threaded_irq(&pdev->dev, bci->irq_bci, NULL, |
a2778b0f | 624 | twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci); |
2e727f17 GI |
625 | if (ret < 0) { |
626 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", | |
627 | bci->irq_bci, ret); | |
325b50aa | 628 | return ret; |
2e727f17 GI |
629 | } |
630 | ||
d6ccc442 HK |
631 | INIT_WORK(&bci->work, twl4030_bci_usb_work); |
632 | ||
f5e4edb8 N |
633 | bci->usb_nb.notifier_call = twl4030_bci_usb_ncb; |
634 | if (bci->dev->of_node) { | |
635 | struct device_node *phynode; | |
636 | ||
637 | phynode = of_find_compatible_node(bci->dev->of_node->parent, | |
638 | NULL, "ti,twl4030-usb"); | |
3fc3895e | 639 | if (phynode) { |
f5e4edb8 N |
640 | bci->transceiver = devm_usb_get_phy_by_node( |
641 | bci->dev, phynode, &bci->usb_nb); | |
3fc3895e N |
642 | if (IS_ERR(bci->transceiver) && |
643 | PTR_ERR(bci->transceiver) == -EPROBE_DEFER) | |
644 | return -EPROBE_DEFER; | |
645 | } | |
2e727f17 GI |
646 | } |
647 | ||
648 | /* Enable interrupts now. */ | |
28d48f04 | 649 | reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 | |
2e727f17 GI |
650 | TWL4030_TBATOR1 | TWL4030_BATSTS); |
651 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, | |
652 | TWL4030_INTERRUPTS_BCIIMR1A); | |
653 | if (ret < 0) { | |
654 | dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret); | |
325b50aa | 655 | return ret; |
2e727f17 GI |
656 | } |
657 | ||
28d48f04 | 658 | reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV); |
2e727f17 GI |
659 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, |
660 | TWL4030_INTERRUPTS_BCIIMR2A); | |
661 | if (ret < 0) | |
662 | dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret); | |
663 | ||
664 | twl4030_charger_enable_ac(true); | |
665 | twl4030_charger_enable_usb(bci, true); | |
ec0b3802 N |
666 | if (pdata) |
667 | twl4030_charger_enable_backup(pdata->bb_uvolt, | |
668 | pdata->bb_uamp); | |
669 | else | |
670 | twl4030_charger_enable_backup(0, 0); | |
2e727f17 GI |
671 | |
672 | return 0; | |
2e727f17 GI |
673 | } |
674 | ||
675 | static int __exit twl4030_bci_remove(struct platform_device *pdev) | |
676 | { | |
677 | struct twl4030_bci *bci = platform_get_drvdata(pdev); | |
678 | ||
679 | twl4030_charger_enable_ac(false); | |
680 | twl4030_charger_enable_usb(bci, false); | |
210d4bc8 | 681 | twl4030_charger_enable_backup(0, 0); |
2e727f17 GI |
682 | |
683 | /* mask interrupts */ | |
684 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, | |
685 | TWL4030_INTERRUPTS_BCIIMR1A); | |
686 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, | |
687 | TWL4030_INTERRUPTS_BCIIMR2A); | |
688 | ||
2e727f17 GI |
689 | return 0; |
690 | } | |
691 | ||
ec0b3802 N |
692 | static const struct of_device_id twl_bci_of_match[] = { |
693 | {.compatible = "ti,twl4030-bci", }, | |
694 | { } | |
695 | }; | |
696 | MODULE_DEVICE_TABLE(of, twl_bci_of_match); | |
697 | ||
2e727f17 | 698 | static struct platform_driver twl4030_bci_driver = { |
7396f708 | 699 | .probe = twl4030_bci_probe, |
2e727f17 GI |
700 | .driver = { |
701 | .name = "twl4030_bci", | |
ec0b3802 | 702 | .of_match_table = of_match_ptr(twl_bci_of_match), |
2e727f17 GI |
703 | }, |
704 | .remove = __exit_p(twl4030_bci_remove), | |
705 | }; | |
7396f708 | 706 | module_platform_driver(twl4030_bci_driver); |
2e727f17 | 707 | |
28d48f04 | 708 | MODULE_AUTHOR("Gražvydas Ignotas"); |
2e727f17 GI |
709 | MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver"); |
710 | MODULE_LICENSE("GPL"); | |
711 | MODULE_ALIAS("platform:twl4030_bci"); |