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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> | |
ab37813f | 25 | #include <linux/regulator/machine.h> |
2e727f17 GI |
26 | |
27 | #define TWL4030_BCIMSTATEC 0x02 | |
28 | #define TWL4030_BCIICHG 0x08 | |
29 | #define TWL4030_BCIVAC 0x0a | |
30 | #define TWL4030_BCIVBUS 0x0c | |
31 | #define TWL4030_BCIMFSTS4 0x10 | |
32 | #define TWL4030_BCICTL1 0x23 | |
210d4bc8 | 33 | #define TWL4030_BB_CFG 0x12 |
2e727f17 GI |
34 | |
35 | #define TWL4030_BCIAUTOWEN BIT(5) | |
36 | #define TWL4030_CONFIG_DONE BIT(4) | |
37 | #define TWL4030_BCIAUTOUSB BIT(1) | |
38 | #define TWL4030_BCIAUTOAC BIT(0) | |
39 | #define TWL4030_CGAIN BIT(5) | |
40 | #define TWL4030_USBFASTMCHG BIT(2) | |
41 | #define TWL4030_STS_VBUS BIT(7) | |
42 | #define TWL4030_STS_USB_ID BIT(2) | |
210d4bc8 | 43 | #define TWL4030_BBCHEN BIT(4) |
94b05cab IH |
44 | #define TWL4030_BBSEL_MASK 0x0c |
45 | #define TWL4030_BBSEL_2V5 0x00 | |
46 | #define TWL4030_BBSEL_3V0 0x04 | |
47 | #define TWL4030_BBSEL_3V1 0x08 | |
48 | #define TWL4030_BBSEL_3V2 0x0c | |
49 | #define TWL4030_BBISEL_MASK 0x03 | |
50 | #define TWL4030_BBISEL_25uA 0x00 | |
51 | #define TWL4030_BBISEL_150uA 0x01 | |
52 | #define TWL4030_BBISEL_500uA 0x02 | |
53 | #define TWL4030_BBISEL_1000uA 0x03 | |
2e727f17 GI |
54 | |
55 | /* BCI interrupts */ | |
56 | #define TWL4030_WOVF BIT(0) /* Watchdog overflow */ | |
57 | #define TWL4030_TMOVF BIT(1) /* Timer overflow */ | |
58 | #define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */ | |
59 | #define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */ | |
60 | #define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */ | |
61 | #define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */ | |
62 | #define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */ | |
63 | #define TWL4030_BATSTS BIT(7) /* Battery status */ | |
64 | ||
65 | #define TWL4030_VBATLVL BIT(0) /* VBAT level */ | |
66 | #define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */ | |
67 | #define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */ | |
68 | #define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */ | |
69 | ||
70 | #define TWL4030_MSTATEC_USB BIT(4) | |
71 | #define TWL4030_MSTATEC_AC BIT(5) | |
72 | #define TWL4030_MSTATEC_MASK 0x0f | |
73 | #define TWL4030_MSTATEC_QUICK1 0x02 | |
74 | #define TWL4030_MSTATEC_QUICK7 0x07 | |
75 | #define TWL4030_MSTATEC_COMPLETE1 0x0b | |
76 | #define TWL4030_MSTATEC_COMPLETE4 0x0e | |
77 | ||
78 | static bool allow_usb; | |
28d48f04 | 79 | module_param(allow_usb, bool, 0644); |
2e727f17 GI |
80 | MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current"); |
81 | ||
82 | struct twl4030_bci { | |
83 | struct device *dev; | |
84 | struct power_supply ac; | |
85 | struct power_supply usb; | |
86753811 | 86 | struct usb_phy *transceiver; |
fcc8ebc9 | 87 | struct notifier_block usb_nb; |
d6ccc442 | 88 | struct work_struct work; |
2e727f17 GI |
89 | int irq_chg; |
90 | int irq_bci; | |
ab37813f N |
91 | struct regulator *usb_reg; |
92 | int usb_enabled; | |
d6ccc442 HK |
93 | |
94 | unsigned long event; | |
2e727f17 GI |
95 | }; |
96 | ||
97 | /* | |
98 | * clear and set bits on an given register on a given module | |
99 | */ | |
100 | static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg) | |
101 | { | |
102 | u8 val = 0; | |
103 | int ret; | |
104 | ||
105 | ret = twl_i2c_read_u8(mod_no, &val, reg); | |
106 | if (ret) | |
107 | return ret; | |
108 | ||
109 | val &= ~clear; | |
110 | val |= set; | |
111 | ||
112 | return twl_i2c_write_u8(mod_no, val, reg); | |
113 | } | |
114 | ||
115 | static int twl4030_bci_read(u8 reg, u8 *val) | |
116 | { | |
e9f14c18 | 117 | return twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, val, reg); |
2e727f17 GI |
118 | } |
119 | ||
120 | static int twl4030_clear_set_boot_bci(u8 clear, u8 set) | |
121 | { | |
e9f14c18 | 122 | return twl4030_clear_set(TWL_MODULE_PM_MASTER, clear, |
2e727f17 GI |
123 | TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set, |
124 | TWL4030_PM_MASTER_BOOT_BCI); | |
125 | } | |
126 | ||
127 | static int twl4030bci_read_adc_val(u8 reg) | |
128 | { | |
129 | int ret, temp; | |
130 | u8 val; | |
131 | ||
132 | /* read MSB */ | |
133 | ret = twl4030_bci_read(reg + 1, &val); | |
134 | if (ret) | |
135 | return ret; | |
136 | ||
137 | temp = (int)(val & 0x03) << 8; | |
138 | ||
139 | /* read LSB */ | |
140 | ret = twl4030_bci_read(reg, &val); | |
141 | if (ret) | |
142 | return ret; | |
143 | ||
144 | return temp | val; | |
145 | } | |
146 | ||
147 | /* | |
148 | * Check if VBUS power is present | |
149 | */ | |
150 | static int twl4030_bci_have_vbus(struct twl4030_bci *bci) | |
151 | { | |
152 | int ret; | |
153 | u8 hwsts; | |
154 | ||
e9f14c18 | 155 | ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &hwsts, |
2e727f17 GI |
156 | TWL4030_PM_MASTER_STS_HW_CONDITIONS); |
157 | if (ret < 0) | |
158 | return 0; | |
159 | ||
160 | dev_dbg(bci->dev, "check_vbus: HW_CONDITIONS %02x\n", hwsts); | |
161 | ||
162 | /* in case we also have STS_USB_ID, VBUS is driven by TWL itself */ | |
163 | if ((hwsts & TWL4030_STS_VBUS) && !(hwsts & TWL4030_STS_USB_ID)) | |
164 | return 1; | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | /* | |
9c645d2f | 170 | * Enable/Disable USB Charge functionality. |
2e727f17 GI |
171 | */ |
172 | static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) | |
173 | { | |
174 | int ret; | |
175 | ||
176 | if (enable) { | |
9c645d2f | 177 | /* Check for USB charger connected */ |
2e727f17 GI |
178 | if (!twl4030_bci_have_vbus(bci)) |
179 | return -ENODEV; | |
180 | ||
181 | /* | |
182 | * Until we can find out what current the device can provide, | |
183 | * require a module param to enable USB charging. | |
184 | */ | |
185 | if (!allow_usb) { | |
186 | dev_warn(bci->dev, "USB charging is disabled.\n"); | |
187 | return -EACCES; | |
188 | } | |
189 | ||
ab37813f N |
190 | /* Need to keep regulator on */ |
191 | if (!bci->usb_enabled) { | |
697be361 PU |
192 | ret = regulator_enable(bci->usb_reg); |
193 | if (ret) { | |
194 | dev_err(bci->dev, | |
195 | "Failed to enable regulator\n"); | |
196 | return ret; | |
197 | } | |
ab37813f N |
198 | bci->usb_enabled = 1; |
199 | } | |
200 | ||
2e727f17 GI |
201 | /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */ |
202 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB); | |
203 | if (ret < 0) | |
204 | return ret; | |
205 | ||
206 | /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */ | |
e9f14c18 | 207 | ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0, |
2e727f17 GI |
208 | TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4); |
209 | } else { | |
210 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0); | |
ab37813f N |
211 | if (bci->usb_enabled) { |
212 | regulator_disable(bci->usb_reg); | |
213 | bci->usb_enabled = 0; | |
214 | } | |
2e727f17 GI |
215 | } |
216 | ||
217 | return ret; | |
218 | } | |
219 | ||
220 | /* | |
221 | * Enable/Disable AC Charge funtionality. | |
222 | */ | |
223 | static int twl4030_charger_enable_ac(bool enable) | |
224 | { | |
225 | int ret; | |
226 | ||
227 | if (enable) | |
228 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC); | |
229 | else | |
230 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0); | |
231 | ||
232 | return ret; | |
233 | } | |
234 | ||
210d4bc8 N |
235 | /* |
236 | * Enable/Disable charging of Backup Battery. | |
237 | */ | |
238 | static int twl4030_charger_enable_backup(int uvolt, int uamp) | |
239 | { | |
240 | int ret; | |
241 | u8 flags; | |
242 | ||
243 | if (uvolt < 2500000 || | |
244 | uamp < 25) { | |
245 | /* disable charging of backup battery */ | |
e9f14c18 | 246 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
210d4bc8 N |
247 | TWL4030_BBCHEN, 0, TWL4030_BB_CFG); |
248 | return ret; | |
249 | } | |
250 | ||
251 | flags = TWL4030_BBCHEN; | |
252 | if (uvolt >= 3200000) | |
253 | flags |= TWL4030_BBSEL_3V2; | |
254 | else if (uvolt >= 3100000) | |
255 | flags |= TWL4030_BBSEL_3V1; | |
256 | else if (uvolt >= 3000000) | |
257 | flags |= TWL4030_BBSEL_3V0; | |
258 | else | |
259 | flags |= TWL4030_BBSEL_2V5; | |
260 | ||
261 | if (uamp >= 1000) | |
262 | flags |= TWL4030_BBISEL_1000uA; | |
263 | else if (uamp >= 500) | |
264 | flags |= TWL4030_BBISEL_500uA; | |
265 | else if (uamp >= 150) | |
266 | flags |= TWL4030_BBISEL_150uA; | |
267 | else | |
268 | flags |= TWL4030_BBISEL_25uA; | |
269 | ||
e9f14c18 | 270 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
210d4bc8 N |
271 | TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK, |
272 | flags, | |
273 | TWL4030_BB_CFG); | |
274 | ||
275 | return ret; | |
276 | } | |
277 | ||
2e727f17 GI |
278 | /* |
279 | * TWL4030 CHG_PRES (AC charger presence) events | |
280 | */ | |
281 | static irqreturn_t twl4030_charger_interrupt(int irq, void *arg) | |
282 | { | |
283 | struct twl4030_bci *bci = arg; | |
284 | ||
285 | dev_dbg(bci->dev, "CHG_PRES irq\n"); | |
286 | power_supply_changed(&bci->ac); | |
287 | power_supply_changed(&bci->usb); | |
288 | ||
289 | return IRQ_HANDLED; | |
290 | } | |
291 | ||
292 | /* | |
293 | * TWL4030 BCI monitoring events | |
294 | */ | |
295 | static irqreturn_t twl4030_bci_interrupt(int irq, void *arg) | |
296 | { | |
297 | struct twl4030_bci *bci = arg; | |
298 | u8 irqs1, irqs2; | |
299 | int ret; | |
300 | ||
301 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1, | |
302 | TWL4030_INTERRUPTS_BCIISR1A); | |
303 | if (ret < 0) | |
304 | return IRQ_HANDLED; | |
305 | ||
306 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2, | |
307 | TWL4030_INTERRUPTS_BCIISR2A); | |
308 | if (ret < 0) | |
309 | return IRQ_HANDLED; | |
310 | ||
311 | dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1); | |
312 | ||
313 | if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) { | |
314 | /* charger state change, inform the core */ | |
315 | power_supply_changed(&bci->ac); | |
316 | power_supply_changed(&bci->usb); | |
317 | } | |
318 | ||
319 | /* various monitoring events, for now we just log them here */ | |
320 | if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1)) | |
321 | dev_warn(bci->dev, "battery temperature out of range\n"); | |
322 | ||
323 | if (irqs1 & TWL4030_BATSTS) | |
324 | dev_crit(bci->dev, "battery disconnected\n"); | |
325 | ||
326 | if (irqs2 & TWL4030_VBATOV) | |
327 | dev_crit(bci->dev, "VBAT overvoltage\n"); | |
328 | ||
329 | if (irqs2 & TWL4030_VBUSOV) | |
330 | dev_crit(bci->dev, "VBUS overvoltage\n"); | |
331 | ||
332 | if (irqs2 & TWL4030_ACCHGOV) | |
333 | dev_crit(bci->dev, "Ac charger overvoltage\n"); | |
334 | ||
335 | return IRQ_HANDLED; | |
336 | } | |
337 | ||
d6ccc442 | 338 | static void twl4030_bci_usb_work(struct work_struct *data) |
2e727f17 | 339 | { |
d6ccc442 | 340 | struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work); |
2e727f17 | 341 | |
d6ccc442 | 342 | switch (bci->event) { |
2e727f17 GI |
343 | case USB_EVENT_VBUS: |
344 | case USB_EVENT_CHARGER: | |
345 | twl4030_charger_enable_usb(bci, true); | |
346 | break; | |
347 | case USB_EVENT_NONE: | |
348 | twl4030_charger_enable_usb(bci, false); | |
349 | break; | |
350 | } | |
d6ccc442 HK |
351 | } |
352 | ||
353 | static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val, | |
354 | void *priv) | |
355 | { | |
fcc8ebc9 | 356 | struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, usb_nb); |
d6ccc442 HK |
357 | |
358 | dev_dbg(bci->dev, "OTG notify %lu\n", val); | |
359 | ||
360 | bci->event = val; | |
361 | schedule_work(&bci->work); | |
2e727f17 GI |
362 | |
363 | return NOTIFY_OK; | |
364 | } | |
365 | ||
366 | /* | |
367 | * TI provided formulas: | |
368 | * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85 | |
369 | * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7 | |
370 | * Here we use integer approximation of: | |
371 | * CGAIN == 0: val * 1.6618 - 0.85 | |
372 | * CGAIN == 1: (val * 1.6618 - 0.85) * 2 | |
373 | */ | |
374 | static int twl4030_charger_get_current(void) | |
375 | { | |
376 | int curr; | |
377 | int ret; | |
378 | u8 bcictl1; | |
379 | ||
380 | curr = twl4030bci_read_adc_val(TWL4030_BCIICHG); | |
381 | if (curr < 0) | |
382 | return curr; | |
383 | ||
384 | ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); | |
385 | if (ret) | |
386 | return ret; | |
387 | ||
388 | ret = (curr * 16618 - 850 * 10000) / 10; | |
389 | if (bcictl1 & TWL4030_CGAIN) | |
390 | ret *= 2; | |
391 | ||
392 | return ret; | |
393 | } | |
394 | ||
395 | /* | |
396 | * Returns the main charge FSM state | |
397 | * Or < 0 on failure. | |
398 | */ | |
399 | static int twl4030bci_state(struct twl4030_bci *bci) | |
400 | { | |
401 | int ret; | |
402 | u8 state; | |
403 | ||
404 | ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state); | |
405 | if (ret) { | |
406 | pr_err("twl4030_bci: error reading BCIMSTATEC\n"); | |
407 | return ret; | |
408 | } | |
409 | ||
410 | dev_dbg(bci->dev, "state: %02x\n", state); | |
411 | ||
412 | return state; | |
413 | } | |
414 | ||
415 | static int twl4030_bci_state_to_status(int state) | |
416 | { | |
417 | state &= TWL4030_MSTATEC_MASK; | |
418 | if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7) | |
419 | return POWER_SUPPLY_STATUS_CHARGING; | |
420 | else if (TWL4030_MSTATEC_COMPLETE1 <= state && | |
421 | state <= TWL4030_MSTATEC_COMPLETE4) | |
422 | return POWER_SUPPLY_STATUS_FULL; | |
423 | else | |
424 | return POWER_SUPPLY_STATUS_NOT_CHARGING; | |
425 | } | |
426 | ||
427 | static int twl4030_bci_get_property(struct power_supply *psy, | |
428 | enum power_supply_property psp, | |
429 | union power_supply_propval *val) | |
430 | { | |
431 | struct twl4030_bci *bci = dev_get_drvdata(psy->dev->parent); | |
432 | int is_charging; | |
433 | int state; | |
434 | int ret; | |
435 | ||
436 | state = twl4030bci_state(bci); | |
437 | if (state < 0) | |
438 | return state; | |
439 | ||
440 | if (psy->type == POWER_SUPPLY_TYPE_USB) | |
441 | is_charging = state & TWL4030_MSTATEC_USB; | |
442 | else | |
443 | is_charging = state & TWL4030_MSTATEC_AC; | |
444 | ||
445 | switch (psp) { | |
446 | case POWER_SUPPLY_PROP_STATUS: | |
447 | if (is_charging) | |
448 | val->intval = twl4030_bci_state_to_status(state); | |
449 | else | |
450 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
451 | break; | |
452 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
453 | /* charging must be active for meaningful result */ | |
454 | if (!is_charging) | |
455 | return -ENODATA; | |
456 | if (psy->type == POWER_SUPPLY_TYPE_USB) { | |
457 | ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS); | |
458 | if (ret < 0) | |
459 | return ret; | |
460 | /* BCIVBUS uses ADCIN8, 7/1023 V/step */ | |
461 | val->intval = ret * 6843; | |
462 | } else { | |
463 | ret = twl4030bci_read_adc_val(TWL4030_BCIVAC); | |
464 | if (ret < 0) | |
465 | return ret; | |
466 | /* BCIVAC uses ADCIN11, 10/1023 V/step */ | |
467 | val->intval = ret * 9775; | |
468 | } | |
469 | break; | |
470 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
471 | if (!is_charging) | |
472 | return -ENODATA; | |
473 | /* current measurement is shared between AC and USB */ | |
474 | ret = twl4030_charger_get_current(); | |
475 | if (ret < 0) | |
476 | return ret; | |
477 | val->intval = ret; | |
478 | break; | |
479 | case POWER_SUPPLY_PROP_ONLINE: | |
480 | val->intval = is_charging && | |
481 | twl4030_bci_state_to_status(state) != | |
482 | POWER_SUPPLY_STATUS_NOT_CHARGING; | |
483 | break; | |
484 | default: | |
485 | return -EINVAL; | |
486 | } | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
491 | static enum power_supply_property twl4030_charger_props[] = { | |
492 | POWER_SUPPLY_PROP_STATUS, | |
493 | POWER_SUPPLY_PROP_ONLINE, | |
494 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
495 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
496 | }; | |
497 | ||
ec0b3802 N |
498 | #ifdef CONFIG_OF |
499 | static const struct twl4030_bci_platform_data * | |
500 | twl4030_bci_parse_dt(struct device *dev) | |
501 | { | |
502 | struct device_node *np = dev->of_node; | |
503 | struct twl4030_bci_platform_data *pdata; | |
504 | u32 num; | |
505 | ||
506 | if (!np) | |
507 | return NULL; | |
508 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
509 | if (!pdata) | |
510 | return pdata; | |
511 | ||
512 | if (of_property_read_u32(np, "ti,bb-uvolt", &num) == 0) | |
513 | pdata->bb_uvolt = num; | |
514 | if (of_property_read_u32(np, "ti,bb-uamp", &num) == 0) | |
515 | pdata->bb_uamp = num; | |
516 | return pdata; | |
517 | } | |
518 | #else | |
519 | static inline const struct twl4030_bci_platform_data * | |
520 | twl4030_bci_parse_dt(struct device *dev) | |
521 | { | |
522 | return NULL; | |
523 | } | |
524 | #endif | |
525 | ||
2e727f17 GI |
526 | static int __init twl4030_bci_probe(struct platform_device *pdev) |
527 | { | |
528 | struct twl4030_bci *bci; | |
ec0b3802 | 529 | const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data; |
2e727f17 | 530 | int ret; |
28d48f04 | 531 | u32 reg; |
2e727f17 GI |
532 | |
533 | bci = kzalloc(sizeof(*bci), GFP_KERNEL); | |
534 | if (bci == NULL) | |
535 | return -ENOMEM; | |
536 | ||
ec0b3802 N |
537 | if (!pdata) |
538 | pdata = twl4030_bci_parse_dt(&pdev->dev); | |
539 | ||
2e727f17 GI |
540 | bci->dev = &pdev->dev; |
541 | bci->irq_chg = platform_get_irq(pdev, 0); | |
542 | bci->irq_bci = platform_get_irq(pdev, 1); | |
543 | ||
544 | platform_set_drvdata(pdev, bci); | |
545 | ||
546 | bci->ac.name = "twl4030_ac"; | |
547 | bci->ac.type = POWER_SUPPLY_TYPE_MAINS; | |
548 | bci->ac.properties = twl4030_charger_props; | |
549 | bci->ac.num_properties = ARRAY_SIZE(twl4030_charger_props); | |
550 | bci->ac.get_property = twl4030_bci_get_property; | |
551 | ||
552 | ret = power_supply_register(&pdev->dev, &bci->ac); | |
553 | if (ret) { | |
554 | dev_err(&pdev->dev, "failed to register ac: %d\n", ret); | |
555 | goto fail_register_ac; | |
556 | } | |
557 | ||
558 | bci->usb.name = "twl4030_usb"; | |
559 | bci->usb.type = POWER_SUPPLY_TYPE_USB; | |
560 | bci->usb.properties = twl4030_charger_props; | |
561 | bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props); | |
562 | bci->usb.get_property = twl4030_bci_get_property; | |
563 | ||
ab37813f N |
564 | bci->usb_reg = regulator_get(bci->dev, "bci3v1"); |
565 | ||
2e727f17 GI |
566 | ret = power_supply_register(&pdev->dev, &bci->usb); |
567 | if (ret) { | |
568 | dev_err(&pdev->dev, "failed to register usb: %d\n", ret); | |
569 | goto fail_register_usb; | |
570 | } | |
571 | ||
572 | ret = request_threaded_irq(bci->irq_chg, NULL, | |
a2778b0f FW |
573 | twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name, |
574 | bci); | |
2e727f17 GI |
575 | if (ret < 0) { |
576 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", | |
577 | bci->irq_chg, ret); | |
578 | goto fail_chg_irq; | |
579 | } | |
580 | ||
581 | ret = request_threaded_irq(bci->irq_bci, NULL, | |
a2778b0f | 582 | twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci); |
2e727f17 GI |
583 | if (ret < 0) { |
584 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", | |
585 | bci->irq_bci, ret); | |
586 | goto fail_bci_irq; | |
587 | } | |
588 | ||
d6ccc442 HK |
589 | INIT_WORK(&bci->work, twl4030_bci_usb_work); |
590 | ||
662dca54 | 591 | bci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2); |
ded017ee | 592 | if (!IS_ERR_OR_NULL(bci->transceiver)) { |
fcc8ebc9 HK |
593 | bci->usb_nb.notifier_call = twl4030_bci_usb_ncb; |
594 | usb_register_notifier(bci->transceiver, &bci->usb_nb); | |
2e727f17 GI |
595 | } |
596 | ||
597 | /* Enable interrupts now. */ | |
28d48f04 | 598 | reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 | |
2e727f17 GI |
599 | TWL4030_TBATOR1 | TWL4030_BATSTS); |
600 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, | |
601 | TWL4030_INTERRUPTS_BCIIMR1A); | |
602 | if (ret < 0) { | |
603 | dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret); | |
604 | goto fail_unmask_interrupts; | |
605 | } | |
606 | ||
28d48f04 | 607 | reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV); |
2e727f17 GI |
608 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, |
609 | TWL4030_INTERRUPTS_BCIIMR2A); | |
610 | if (ret < 0) | |
611 | dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret); | |
612 | ||
613 | twl4030_charger_enable_ac(true); | |
614 | twl4030_charger_enable_usb(bci, true); | |
ec0b3802 N |
615 | if (pdata) |
616 | twl4030_charger_enable_backup(pdata->bb_uvolt, | |
617 | pdata->bb_uamp); | |
618 | else | |
619 | twl4030_charger_enable_backup(0, 0); | |
2e727f17 GI |
620 | |
621 | return 0; | |
622 | ||
623 | fail_unmask_interrupts: | |
ded017ee | 624 | if (!IS_ERR_OR_NULL(bci->transceiver)) { |
fcc8ebc9 | 625 | usb_unregister_notifier(bci->transceiver, &bci->usb_nb); |
721002ec | 626 | usb_put_phy(bci->transceiver); |
2e727f17 GI |
627 | } |
628 | free_irq(bci->irq_bci, bci); | |
629 | fail_bci_irq: | |
630 | free_irq(bci->irq_chg, bci); | |
631 | fail_chg_irq: | |
632 | power_supply_unregister(&bci->usb); | |
633 | fail_register_usb: | |
634 | power_supply_unregister(&bci->ac); | |
635 | fail_register_ac: | |
2e727f17 GI |
636 | kfree(bci); |
637 | ||
638 | return ret; | |
639 | } | |
640 | ||
641 | static int __exit twl4030_bci_remove(struct platform_device *pdev) | |
642 | { | |
643 | struct twl4030_bci *bci = platform_get_drvdata(pdev); | |
644 | ||
645 | twl4030_charger_enable_ac(false); | |
646 | twl4030_charger_enable_usb(bci, false); | |
210d4bc8 | 647 | twl4030_charger_enable_backup(0, 0); |
2e727f17 GI |
648 | |
649 | /* mask interrupts */ | |
650 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, | |
651 | TWL4030_INTERRUPTS_BCIIMR1A); | |
652 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, | |
653 | TWL4030_INTERRUPTS_BCIIMR2A); | |
654 | ||
ded017ee | 655 | if (!IS_ERR_OR_NULL(bci->transceiver)) { |
fcc8ebc9 | 656 | usb_unregister_notifier(bci->transceiver, &bci->usb_nb); |
721002ec | 657 | usb_put_phy(bci->transceiver); |
2e727f17 GI |
658 | } |
659 | free_irq(bci->irq_bci, bci); | |
660 | free_irq(bci->irq_chg, bci); | |
661 | power_supply_unregister(&bci->usb); | |
662 | power_supply_unregister(&bci->ac); | |
2e727f17 GI |
663 | kfree(bci); |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
ec0b3802 N |
668 | static const struct of_device_id twl_bci_of_match[] = { |
669 | {.compatible = "ti,twl4030-bci", }, | |
670 | { } | |
671 | }; | |
672 | MODULE_DEVICE_TABLE(of, twl_bci_of_match); | |
673 | ||
2e727f17 GI |
674 | static struct platform_driver twl4030_bci_driver = { |
675 | .driver = { | |
676 | .name = "twl4030_bci", | |
677 | .owner = THIS_MODULE, | |
ec0b3802 | 678 | .of_match_table = of_match_ptr(twl_bci_of_match), |
2e727f17 GI |
679 | }, |
680 | .remove = __exit_p(twl4030_bci_remove), | |
681 | }; | |
682 | ||
4420dc20 | 683 | module_platform_driver_probe(twl4030_bci_driver, twl4030_bci_probe); |
2e727f17 | 684 | |
28d48f04 | 685 | MODULE_AUTHOR("Gražvydas Ignotas"); |
2e727f17 GI |
686 | MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver"); |
687 | MODULE_LICENSE("GPL"); | |
688 | MODULE_ALIAS("platform:twl4030_bci"); |