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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 | |
61a7784e | 31 | #define TWL4030_BCIMFSTS3 0x0F |
2e727f17 GI |
32 | #define TWL4030_BCIMFSTS4 0x10 |
33 | #define TWL4030_BCICTL1 0x23 | |
210d4bc8 | 34 | #define TWL4030_BB_CFG 0x12 |
2e727f17 | 35 | |
61a7784e NM |
36 | #define TWL4030_BCIMFSTS1 0x01 |
37 | ||
2e727f17 GI |
38 | #define TWL4030_BCIAUTOWEN BIT(5) |
39 | #define TWL4030_CONFIG_DONE BIT(4) | |
40 | #define TWL4030_BCIAUTOUSB BIT(1) | |
41 | #define TWL4030_BCIAUTOAC BIT(0) | |
42 | #define TWL4030_CGAIN BIT(5) | |
43 | #define TWL4030_USBFASTMCHG BIT(2) | |
44 | #define TWL4030_STS_VBUS BIT(7) | |
45 | #define TWL4030_STS_USB_ID BIT(2) | |
210d4bc8 | 46 | #define TWL4030_BBCHEN BIT(4) |
94b05cab IH |
47 | #define TWL4030_BBSEL_MASK 0x0c |
48 | #define TWL4030_BBSEL_2V5 0x00 | |
49 | #define TWL4030_BBSEL_3V0 0x04 | |
50 | #define TWL4030_BBSEL_3V1 0x08 | |
51 | #define TWL4030_BBSEL_3V2 0x0c | |
52 | #define TWL4030_BBISEL_MASK 0x03 | |
53 | #define TWL4030_BBISEL_25uA 0x00 | |
54 | #define TWL4030_BBISEL_150uA 0x01 | |
55 | #define TWL4030_BBISEL_500uA 0x02 | |
56 | #define TWL4030_BBISEL_1000uA 0x03 | |
2e727f17 | 57 | |
61a7784e NM |
58 | #define TWL4030_BATSTSPCHG BIT(2) |
59 | #define TWL4030_BATSTSMCHG BIT(6) | |
60 | ||
2e727f17 GI |
61 | /* BCI interrupts */ |
62 | #define TWL4030_WOVF BIT(0) /* Watchdog overflow */ | |
63 | #define TWL4030_TMOVF BIT(1) /* Timer overflow */ | |
64 | #define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */ | |
65 | #define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */ | |
66 | #define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */ | |
67 | #define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */ | |
68 | #define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */ | |
69 | #define TWL4030_BATSTS BIT(7) /* Battery status */ | |
70 | ||
71 | #define TWL4030_VBATLVL BIT(0) /* VBAT level */ | |
72 | #define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */ | |
73 | #define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */ | |
74 | #define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */ | |
75 | ||
76 | #define TWL4030_MSTATEC_USB BIT(4) | |
77 | #define TWL4030_MSTATEC_AC BIT(5) | |
78 | #define TWL4030_MSTATEC_MASK 0x0f | |
79 | #define TWL4030_MSTATEC_QUICK1 0x02 | |
80 | #define TWL4030_MSTATEC_QUICK7 0x07 | |
81 | #define TWL4030_MSTATEC_COMPLETE1 0x0b | |
82 | #define TWL4030_MSTATEC_COMPLETE4 0x0e | |
83 | ||
84 | static bool allow_usb; | |
28d48f04 | 85 | module_param(allow_usb, bool, 0644); |
2e727f17 GI |
86 | MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current"); |
87 | ||
88 | struct twl4030_bci { | |
89 | struct device *dev; | |
297d716f KK |
90 | struct power_supply *ac; |
91 | struct power_supply *usb; | |
86753811 | 92 | struct usb_phy *transceiver; |
fcc8ebc9 | 93 | struct notifier_block usb_nb; |
d6ccc442 | 94 | struct work_struct work; |
2e727f17 GI |
95 | int irq_chg; |
96 | int irq_bci; | |
ab37813f N |
97 | struct regulator *usb_reg; |
98 | int usb_enabled; | |
d6ccc442 HK |
99 | |
100 | unsigned long event; | |
2e727f17 GI |
101 | }; |
102 | ||
103 | /* | |
104 | * clear and set bits on an given register on a given module | |
105 | */ | |
106 | static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg) | |
107 | { | |
108 | u8 val = 0; | |
109 | int ret; | |
110 | ||
111 | ret = twl_i2c_read_u8(mod_no, &val, reg); | |
112 | if (ret) | |
113 | return ret; | |
114 | ||
115 | val &= ~clear; | |
116 | val |= set; | |
117 | ||
118 | return twl_i2c_write_u8(mod_no, val, reg); | |
119 | } | |
120 | ||
121 | static int twl4030_bci_read(u8 reg, u8 *val) | |
122 | { | |
e9f14c18 | 123 | return twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, val, reg); |
2e727f17 GI |
124 | } |
125 | ||
126 | static int twl4030_clear_set_boot_bci(u8 clear, u8 set) | |
127 | { | |
e9f14c18 | 128 | return twl4030_clear_set(TWL_MODULE_PM_MASTER, clear, |
2e727f17 GI |
129 | TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set, |
130 | TWL4030_PM_MASTER_BOOT_BCI); | |
131 | } | |
132 | ||
133 | static int twl4030bci_read_adc_val(u8 reg) | |
134 | { | |
135 | int ret, temp; | |
136 | u8 val; | |
137 | ||
138 | /* read MSB */ | |
139 | ret = twl4030_bci_read(reg + 1, &val); | |
140 | if (ret) | |
141 | return ret; | |
142 | ||
143 | temp = (int)(val & 0x03) << 8; | |
144 | ||
145 | /* read LSB */ | |
146 | ret = twl4030_bci_read(reg, &val); | |
147 | if (ret) | |
148 | return ret; | |
149 | ||
150 | return temp | val; | |
151 | } | |
152 | ||
61a7784e NM |
153 | /* |
154 | * Check if Battery Pack was present | |
155 | */ | |
156 | static int twl4030_is_battery_present(struct twl4030_bci *bci) | |
157 | { | |
158 | int ret; | |
159 | u8 val = 0; | |
160 | ||
161 | /* Battery presence in Main charge? */ | |
162 | ret = twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, &val, TWL4030_BCIMFSTS3); | |
163 | if (ret) | |
164 | return ret; | |
165 | if (val & TWL4030_BATSTSMCHG) | |
166 | return 0; | |
167 | ||
168 | /* | |
169 | * OK, It could be that bootloader did not enable main charger, | |
170 | * pre-charge is h/w auto. So, Battery presence in Pre-charge? | |
171 | */ | |
172 | ret = twl_i2c_read_u8(TWL4030_MODULE_PRECHARGE, &val, | |
173 | TWL4030_BCIMFSTS1); | |
174 | if (ret) | |
175 | return ret; | |
176 | if (val & TWL4030_BATSTSPCHG) | |
177 | return 0; | |
178 | ||
179 | return -ENODEV; | |
180 | } | |
181 | ||
2e727f17 GI |
182 | /* |
183 | * Check if VBUS power is present | |
184 | */ | |
185 | static int twl4030_bci_have_vbus(struct twl4030_bci *bci) | |
186 | { | |
187 | int ret; | |
188 | u8 hwsts; | |
189 | ||
e9f14c18 | 190 | ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &hwsts, |
2e727f17 GI |
191 | TWL4030_PM_MASTER_STS_HW_CONDITIONS); |
192 | if (ret < 0) | |
193 | return 0; | |
194 | ||
195 | dev_dbg(bci->dev, "check_vbus: HW_CONDITIONS %02x\n", hwsts); | |
196 | ||
197 | /* in case we also have STS_USB_ID, VBUS is driven by TWL itself */ | |
198 | if ((hwsts & TWL4030_STS_VBUS) && !(hwsts & TWL4030_STS_USB_ID)) | |
199 | return 1; | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
204 | /* | |
9c645d2f | 205 | * Enable/Disable USB Charge functionality. |
2e727f17 GI |
206 | */ |
207 | static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) | |
208 | { | |
209 | int ret; | |
210 | ||
211 | if (enable) { | |
9c645d2f | 212 | /* Check for USB charger connected */ |
2e727f17 GI |
213 | if (!twl4030_bci_have_vbus(bci)) |
214 | return -ENODEV; | |
215 | ||
216 | /* | |
217 | * Until we can find out what current the device can provide, | |
218 | * require a module param to enable USB charging. | |
219 | */ | |
220 | if (!allow_usb) { | |
221 | dev_warn(bci->dev, "USB charging is disabled.\n"); | |
222 | return -EACCES; | |
223 | } | |
224 | ||
ab37813f N |
225 | /* Need to keep regulator on */ |
226 | if (!bci->usb_enabled) { | |
697be361 PU |
227 | ret = regulator_enable(bci->usb_reg); |
228 | if (ret) { | |
229 | dev_err(bci->dev, | |
230 | "Failed to enable regulator\n"); | |
231 | return ret; | |
232 | } | |
ab37813f N |
233 | bci->usb_enabled = 1; |
234 | } | |
235 | ||
2e727f17 GI |
236 | /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */ |
237 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB); | |
238 | if (ret < 0) | |
239 | return ret; | |
240 | ||
241 | /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */ | |
e9f14c18 | 242 | ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0, |
2e727f17 GI |
243 | TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4); |
244 | } else { | |
245 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0); | |
ab37813f N |
246 | if (bci->usb_enabled) { |
247 | regulator_disable(bci->usb_reg); | |
248 | bci->usb_enabled = 0; | |
249 | } | |
2e727f17 GI |
250 | } |
251 | ||
252 | return ret; | |
253 | } | |
254 | ||
255 | /* | |
256 | * Enable/Disable AC Charge funtionality. | |
257 | */ | |
258 | static int twl4030_charger_enable_ac(bool enable) | |
259 | { | |
260 | int ret; | |
261 | ||
262 | if (enable) | |
263 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC); | |
264 | else | |
265 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0); | |
266 | ||
267 | return ret; | |
268 | } | |
269 | ||
210d4bc8 N |
270 | /* |
271 | * Enable/Disable charging of Backup Battery. | |
272 | */ | |
273 | static int twl4030_charger_enable_backup(int uvolt, int uamp) | |
274 | { | |
275 | int ret; | |
276 | u8 flags; | |
277 | ||
278 | if (uvolt < 2500000 || | |
279 | uamp < 25) { | |
280 | /* disable charging of backup battery */ | |
e9f14c18 | 281 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
210d4bc8 N |
282 | TWL4030_BBCHEN, 0, TWL4030_BB_CFG); |
283 | return ret; | |
284 | } | |
285 | ||
286 | flags = TWL4030_BBCHEN; | |
287 | if (uvolt >= 3200000) | |
288 | flags |= TWL4030_BBSEL_3V2; | |
289 | else if (uvolt >= 3100000) | |
290 | flags |= TWL4030_BBSEL_3V1; | |
291 | else if (uvolt >= 3000000) | |
292 | flags |= TWL4030_BBSEL_3V0; | |
293 | else | |
294 | flags |= TWL4030_BBSEL_2V5; | |
295 | ||
296 | if (uamp >= 1000) | |
297 | flags |= TWL4030_BBISEL_1000uA; | |
298 | else if (uamp >= 500) | |
299 | flags |= TWL4030_BBISEL_500uA; | |
300 | else if (uamp >= 150) | |
301 | flags |= TWL4030_BBISEL_150uA; | |
302 | else | |
303 | flags |= TWL4030_BBISEL_25uA; | |
304 | ||
e9f14c18 | 305 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
210d4bc8 N |
306 | TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK, |
307 | flags, | |
308 | TWL4030_BB_CFG); | |
309 | ||
310 | return ret; | |
311 | } | |
312 | ||
2e727f17 GI |
313 | /* |
314 | * TWL4030 CHG_PRES (AC charger presence) events | |
315 | */ | |
316 | static irqreturn_t twl4030_charger_interrupt(int irq, void *arg) | |
317 | { | |
318 | struct twl4030_bci *bci = arg; | |
319 | ||
320 | dev_dbg(bci->dev, "CHG_PRES irq\n"); | |
297d716f KK |
321 | power_supply_changed(bci->ac); |
322 | power_supply_changed(bci->usb); | |
2e727f17 GI |
323 | |
324 | return IRQ_HANDLED; | |
325 | } | |
326 | ||
327 | /* | |
328 | * TWL4030 BCI monitoring events | |
329 | */ | |
330 | static irqreturn_t twl4030_bci_interrupt(int irq, void *arg) | |
331 | { | |
332 | struct twl4030_bci *bci = arg; | |
333 | u8 irqs1, irqs2; | |
334 | int ret; | |
335 | ||
336 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1, | |
337 | TWL4030_INTERRUPTS_BCIISR1A); | |
338 | if (ret < 0) | |
339 | return IRQ_HANDLED; | |
340 | ||
341 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2, | |
342 | TWL4030_INTERRUPTS_BCIISR2A); | |
343 | if (ret < 0) | |
344 | return IRQ_HANDLED; | |
345 | ||
346 | dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1); | |
347 | ||
348 | if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) { | |
349 | /* charger state change, inform the core */ | |
297d716f KK |
350 | power_supply_changed(bci->ac); |
351 | power_supply_changed(bci->usb); | |
2e727f17 GI |
352 | } |
353 | ||
354 | /* various monitoring events, for now we just log them here */ | |
355 | if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1)) | |
356 | dev_warn(bci->dev, "battery temperature out of range\n"); | |
357 | ||
358 | if (irqs1 & TWL4030_BATSTS) | |
359 | dev_crit(bci->dev, "battery disconnected\n"); | |
360 | ||
361 | if (irqs2 & TWL4030_VBATOV) | |
362 | dev_crit(bci->dev, "VBAT overvoltage\n"); | |
363 | ||
364 | if (irqs2 & TWL4030_VBUSOV) | |
365 | dev_crit(bci->dev, "VBUS overvoltage\n"); | |
366 | ||
367 | if (irqs2 & TWL4030_ACCHGOV) | |
368 | dev_crit(bci->dev, "Ac charger overvoltage\n"); | |
369 | ||
370 | return IRQ_HANDLED; | |
371 | } | |
372 | ||
d6ccc442 | 373 | static void twl4030_bci_usb_work(struct work_struct *data) |
2e727f17 | 374 | { |
d6ccc442 | 375 | struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work); |
2e727f17 | 376 | |
d6ccc442 | 377 | switch (bci->event) { |
2e727f17 GI |
378 | case USB_EVENT_VBUS: |
379 | case USB_EVENT_CHARGER: | |
380 | twl4030_charger_enable_usb(bci, true); | |
381 | break; | |
382 | case USB_EVENT_NONE: | |
383 | twl4030_charger_enable_usb(bci, false); | |
384 | break; | |
385 | } | |
d6ccc442 HK |
386 | } |
387 | ||
388 | static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val, | |
389 | void *priv) | |
390 | { | |
fcc8ebc9 | 391 | struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, usb_nb); |
d6ccc442 HK |
392 | |
393 | dev_dbg(bci->dev, "OTG notify %lu\n", val); | |
394 | ||
395 | bci->event = val; | |
396 | schedule_work(&bci->work); | |
2e727f17 GI |
397 | |
398 | return NOTIFY_OK; | |
399 | } | |
400 | ||
401 | /* | |
402 | * TI provided formulas: | |
403 | * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85 | |
404 | * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7 | |
405 | * Here we use integer approximation of: | |
406 | * CGAIN == 0: val * 1.6618 - 0.85 | |
407 | * CGAIN == 1: (val * 1.6618 - 0.85) * 2 | |
408 | */ | |
409 | static int twl4030_charger_get_current(void) | |
410 | { | |
411 | int curr; | |
412 | int ret; | |
413 | u8 bcictl1; | |
414 | ||
415 | curr = twl4030bci_read_adc_val(TWL4030_BCIICHG); | |
416 | if (curr < 0) | |
417 | return curr; | |
418 | ||
419 | ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); | |
420 | if (ret) | |
421 | return ret; | |
422 | ||
423 | ret = (curr * 16618 - 850 * 10000) / 10; | |
424 | if (bcictl1 & TWL4030_CGAIN) | |
425 | ret *= 2; | |
426 | ||
427 | return ret; | |
428 | } | |
429 | ||
430 | /* | |
431 | * Returns the main charge FSM state | |
432 | * Or < 0 on failure. | |
433 | */ | |
434 | static int twl4030bci_state(struct twl4030_bci *bci) | |
435 | { | |
436 | int ret; | |
437 | u8 state; | |
438 | ||
439 | ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state); | |
440 | if (ret) { | |
441 | pr_err("twl4030_bci: error reading BCIMSTATEC\n"); | |
442 | return ret; | |
443 | } | |
444 | ||
445 | dev_dbg(bci->dev, "state: %02x\n", state); | |
446 | ||
447 | return state; | |
448 | } | |
449 | ||
450 | static int twl4030_bci_state_to_status(int state) | |
451 | { | |
452 | state &= TWL4030_MSTATEC_MASK; | |
453 | if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7) | |
454 | return POWER_SUPPLY_STATUS_CHARGING; | |
455 | else if (TWL4030_MSTATEC_COMPLETE1 <= state && | |
456 | state <= TWL4030_MSTATEC_COMPLETE4) | |
457 | return POWER_SUPPLY_STATUS_FULL; | |
458 | else | |
459 | return POWER_SUPPLY_STATUS_NOT_CHARGING; | |
460 | } | |
461 | ||
462 | static int twl4030_bci_get_property(struct power_supply *psy, | |
463 | enum power_supply_property psp, | |
464 | union power_supply_propval *val) | |
465 | { | |
297d716f | 466 | struct twl4030_bci *bci = dev_get_drvdata(psy->dev.parent); |
2e727f17 GI |
467 | int is_charging; |
468 | int state; | |
469 | int ret; | |
470 | ||
471 | state = twl4030bci_state(bci); | |
472 | if (state < 0) | |
473 | return state; | |
474 | ||
297d716f | 475 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) |
2e727f17 GI |
476 | is_charging = state & TWL4030_MSTATEC_USB; |
477 | else | |
478 | is_charging = state & TWL4030_MSTATEC_AC; | |
479 | ||
480 | switch (psp) { | |
481 | case POWER_SUPPLY_PROP_STATUS: | |
482 | if (is_charging) | |
483 | val->intval = twl4030_bci_state_to_status(state); | |
484 | else | |
485 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
486 | break; | |
487 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
488 | /* charging must be active for meaningful result */ | |
489 | if (!is_charging) | |
490 | return -ENODATA; | |
297d716f | 491 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) { |
2e727f17 GI |
492 | ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS); |
493 | if (ret < 0) | |
494 | return ret; | |
495 | /* BCIVBUS uses ADCIN8, 7/1023 V/step */ | |
496 | val->intval = ret * 6843; | |
497 | } else { | |
498 | ret = twl4030bci_read_adc_val(TWL4030_BCIVAC); | |
499 | if (ret < 0) | |
500 | return ret; | |
501 | /* BCIVAC uses ADCIN11, 10/1023 V/step */ | |
502 | val->intval = ret * 9775; | |
503 | } | |
504 | break; | |
505 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
506 | if (!is_charging) | |
507 | return -ENODATA; | |
508 | /* current measurement is shared between AC and USB */ | |
509 | ret = twl4030_charger_get_current(); | |
510 | if (ret < 0) | |
511 | return ret; | |
512 | val->intval = ret; | |
513 | break; | |
514 | case POWER_SUPPLY_PROP_ONLINE: | |
515 | val->intval = is_charging && | |
516 | twl4030_bci_state_to_status(state) != | |
517 | POWER_SUPPLY_STATUS_NOT_CHARGING; | |
518 | break; | |
519 | default: | |
520 | return -EINVAL; | |
521 | } | |
522 | ||
523 | return 0; | |
524 | } | |
525 | ||
526 | static enum power_supply_property twl4030_charger_props[] = { | |
527 | POWER_SUPPLY_PROP_STATUS, | |
528 | POWER_SUPPLY_PROP_ONLINE, | |
529 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
530 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
531 | }; | |
532 | ||
ec0b3802 N |
533 | #ifdef CONFIG_OF |
534 | static const struct twl4030_bci_platform_data * | |
535 | twl4030_bci_parse_dt(struct device *dev) | |
536 | { | |
537 | struct device_node *np = dev->of_node; | |
538 | struct twl4030_bci_platform_data *pdata; | |
539 | u32 num; | |
540 | ||
541 | if (!np) | |
542 | return NULL; | |
543 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
544 | if (!pdata) | |
545 | return pdata; | |
546 | ||
547 | if (of_property_read_u32(np, "ti,bb-uvolt", &num) == 0) | |
548 | pdata->bb_uvolt = num; | |
549 | if (of_property_read_u32(np, "ti,bb-uamp", &num) == 0) | |
550 | pdata->bb_uamp = num; | |
551 | return pdata; | |
552 | } | |
553 | #else | |
554 | static inline const struct twl4030_bci_platform_data * | |
555 | twl4030_bci_parse_dt(struct device *dev) | |
556 | { | |
557 | return NULL; | |
558 | } | |
559 | #endif | |
560 | ||
297d716f KK |
561 | static const struct power_supply_desc twl4030_bci_ac_desc = { |
562 | .name = "twl4030_ac", | |
563 | .type = POWER_SUPPLY_TYPE_MAINS, | |
564 | .properties = twl4030_charger_props, | |
565 | .num_properties = ARRAY_SIZE(twl4030_charger_props), | |
566 | .get_property = twl4030_bci_get_property, | |
567 | }; | |
568 | ||
569 | static const struct power_supply_desc twl4030_bci_usb_desc = { | |
570 | .name = "twl4030_usb", | |
571 | .type = POWER_SUPPLY_TYPE_USB, | |
572 | .properties = twl4030_charger_props, | |
573 | .num_properties = ARRAY_SIZE(twl4030_charger_props), | |
574 | .get_property = twl4030_bci_get_property, | |
575 | }; | |
576 | ||
2e727f17 GI |
577 | static int __init twl4030_bci_probe(struct platform_device *pdev) |
578 | { | |
579 | struct twl4030_bci *bci; | |
ec0b3802 | 580 | const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data; |
2e727f17 | 581 | int ret; |
28d48f04 | 582 | u32 reg; |
2e727f17 GI |
583 | |
584 | bci = kzalloc(sizeof(*bci), GFP_KERNEL); | |
585 | if (bci == NULL) | |
586 | return -ENOMEM; | |
587 | ||
ec0b3802 N |
588 | if (!pdata) |
589 | pdata = twl4030_bci_parse_dt(&pdev->dev); | |
590 | ||
2e727f17 GI |
591 | bci->dev = &pdev->dev; |
592 | bci->irq_chg = platform_get_irq(pdev, 0); | |
593 | bci->irq_bci = platform_get_irq(pdev, 1); | |
594 | ||
61a7784e NM |
595 | /* Only proceed further *IF* battery is physically present */ |
596 | ret = twl4030_is_battery_present(bci); | |
597 | if (ret) { | |
598 | dev_crit(&pdev->dev, "Battery was not detected:%d\n", ret); | |
599 | goto fail_no_battery; | |
600 | } | |
2e727f17 | 601 | |
61a7784e | 602 | platform_set_drvdata(pdev, bci); |
2e727f17 | 603 | |
297d716f KK |
604 | bci->ac = power_supply_register(&pdev->dev, &twl4030_bci_ac_desc, |
605 | NULL); | |
606 | if (IS_ERR(bci->ac)) { | |
607 | ret = PTR_ERR(bci->ac); | |
2e727f17 GI |
608 | dev_err(&pdev->dev, "failed to register ac: %d\n", ret); |
609 | goto fail_register_ac; | |
610 | } | |
611 | ||
ab37813f N |
612 | bci->usb_reg = regulator_get(bci->dev, "bci3v1"); |
613 | ||
297d716f KK |
614 | bci->usb = power_supply_register(&pdev->dev, &twl4030_bci_usb_desc, |
615 | NULL); | |
616 | if (IS_ERR(bci->usb)) { | |
617 | ret = PTR_ERR(bci->usb); | |
2e727f17 GI |
618 | dev_err(&pdev->dev, "failed to register usb: %d\n", ret); |
619 | goto fail_register_usb; | |
620 | } | |
621 | ||
622 | ret = request_threaded_irq(bci->irq_chg, NULL, | |
a2778b0f FW |
623 | twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name, |
624 | bci); | |
2e727f17 GI |
625 | if (ret < 0) { |
626 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", | |
627 | bci->irq_chg, ret); | |
628 | goto fail_chg_irq; | |
629 | } | |
630 | ||
631 | ret = request_threaded_irq(bci->irq_bci, NULL, | |
a2778b0f | 632 | twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci); |
2e727f17 GI |
633 | if (ret < 0) { |
634 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", | |
635 | bci->irq_bci, ret); | |
636 | goto fail_bci_irq; | |
637 | } | |
638 | ||
d6ccc442 HK |
639 | INIT_WORK(&bci->work, twl4030_bci_usb_work); |
640 | ||
662dca54 | 641 | bci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2); |
ded017ee | 642 | if (!IS_ERR_OR_NULL(bci->transceiver)) { |
fcc8ebc9 HK |
643 | bci->usb_nb.notifier_call = twl4030_bci_usb_ncb; |
644 | usb_register_notifier(bci->transceiver, &bci->usb_nb); | |
2e727f17 GI |
645 | } |
646 | ||
647 | /* Enable interrupts now. */ | |
28d48f04 | 648 | reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 | |
2e727f17 GI |
649 | TWL4030_TBATOR1 | TWL4030_BATSTS); |
650 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, | |
651 | TWL4030_INTERRUPTS_BCIIMR1A); | |
652 | if (ret < 0) { | |
653 | dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret); | |
654 | goto fail_unmask_interrupts; | |
655 | } | |
656 | ||
28d48f04 | 657 | reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV); |
2e727f17 GI |
658 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, |
659 | TWL4030_INTERRUPTS_BCIIMR2A); | |
660 | if (ret < 0) | |
661 | dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret); | |
662 | ||
663 | twl4030_charger_enable_ac(true); | |
664 | twl4030_charger_enable_usb(bci, true); | |
ec0b3802 N |
665 | if (pdata) |
666 | twl4030_charger_enable_backup(pdata->bb_uvolt, | |
667 | pdata->bb_uamp); | |
668 | else | |
669 | twl4030_charger_enable_backup(0, 0); | |
2e727f17 GI |
670 | |
671 | return 0; | |
672 | ||
673 | fail_unmask_interrupts: | |
ded017ee | 674 | if (!IS_ERR_OR_NULL(bci->transceiver)) { |
fcc8ebc9 | 675 | usb_unregister_notifier(bci->transceiver, &bci->usb_nb); |
721002ec | 676 | usb_put_phy(bci->transceiver); |
2e727f17 GI |
677 | } |
678 | free_irq(bci->irq_bci, bci); | |
679 | fail_bci_irq: | |
680 | free_irq(bci->irq_chg, bci); | |
681 | fail_chg_irq: | |
297d716f | 682 | power_supply_unregister(bci->usb); |
2e727f17 | 683 | fail_register_usb: |
297d716f | 684 | power_supply_unregister(bci->ac); |
2e727f17 | 685 | fail_register_ac: |
61a7784e | 686 | fail_no_battery: |
2e727f17 GI |
687 | kfree(bci); |
688 | ||
689 | return ret; | |
690 | } | |
691 | ||
692 | static int __exit twl4030_bci_remove(struct platform_device *pdev) | |
693 | { | |
694 | struct twl4030_bci *bci = platform_get_drvdata(pdev); | |
695 | ||
696 | twl4030_charger_enable_ac(false); | |
697 | twl4030_charger_enable_usb(bci, false); | |
210d4bc8 | 698 | twl4030_charger_enable_backup(0, 0); |
2e727f17 GI |
699 | |
700 | /* mask interrupts */ | |
701 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, | |
702 | TWL4030_INTERRUPTS_BCIIMR1A); | |
703 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, | |
704 | TWL4030_INTERRUPTS_BCIIMR2A); | |
705 | ||
ded017ee | 706 | if (!IS_ERR_OR_NULL(bci->transceiver)) { |
fcc8ebc9 | 707 | usb_unregister_notifier(bci->transceiver, &bci->usb_nb); |
721002ec | 708 | usb_put_phy(bci->transceiver); |
2e727f17 GI |
709 | } |
710 | free_irq(bci->irq_bci, bci); | |
711 | free_irq(bci->irq_chg, bci); | |
297d716f KK |
712 | power_supply_unregister(bci->usb); |
713 | power_supply_unregister(bci->ac); | |
2e727f17 GI |
714 | kfree(bci); |
715 | ||
716 | return 0; | |
717 | } | |
718 | ||
ec0b3802 N |
719 | static const struct of_device_id twl_bci_of_match[] = { |
720 | {.compatible = "ti,twl4030-bci", }, | |
721 | { } | |
722 | }; | |
723 | MODULE_DEVICE_TABLE(of, twl_bci_of_match); | |
724 | ||
2e727f17 GI |
725 | static struct platform_driver twl4030_bci_driver = { |
726 | .driver = { | |
727 | .name = "twl4030_bci", | |
ec0b3802 | 728 | .of_match_table = of_match_ptr(twl_bci_of_match), |
2e727f17 GI |
729 | }, |
730 | .remove = __exit_p(twl4030_bci_remove), | |
731 | }; | |
732 | ||
4420dc20 | 733 | module_platform_driver_probe(twl4030_bci_driver, twl4030_bci_probe); |
2e727f17 | 734 | |
28d48f04 | 735 | MODULE_AUTHOR("Gražvydas Ignotas"); |
2e727f17 GI |
736 | MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver"); |
737 | MODULE_LICENSE("GPL"); | |
738 | MODULE_ALIAS("platform:twl4030_bci"); |