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Grazvydas Ignotas2e727f12010-09-27 23:18:24 +03001/*
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>
Kishon Vijay Abraham Ided017e2012-06-26 17:40:32 +053018#include <linux/err.h>
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +030019#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>
NeilBrownab378132012-05-09 07:40:40 +100025#include <linux/regulator/machine.h>
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +030026
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
NeilBrown210d4bc2012-05-09 07:40:40 +100033#define TWL4030_BB_CFG 0x12
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +030034
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)
NeilBrown210d4bc2012-05-09 07:40:40 +100043#define TWL4030_BBCHEN BIT(4)
Il Han94b05ca2012-08-17 16:49:43 +090044#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
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +030054
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
78static bool allow_usb;
Grazvydas Ignotas28d48f02011-06-03 14:43:11 +030079module_param(allow_usb, bool, 0644);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +030080MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current");
81
82struct twl4030_bci {
83 struct device *dev;
84 struct power_supply ac;
85 struct power_supply usb;
Heikki Krogerus86753812012-02-13 13:24:02 +020086 struct usb_phy *transceiver;
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +020087 struct notifier_block usb_nb;
Heikki Krogerusd6ccc442011-02-25 13:56:36 +020088 struct work_struct work;
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +030089 int irq_chg;
90 int irq_bci;
NeilBrownab378132012-05-09 07:40:40 +100091 struct regulator *usb_reg;
92 int usb_enabled;
Heikki Krogerusd6ccc442011-02-25 13:56:36 +020093
94 unsigned long event;
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +030095};
96
97/*
98 * clear and set bits on an given register on a given module
99 */
100static 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
115static int twl4030_bci_read(u8 reg, u8 *val)
116{
Peter Ujfalusie9f14c12012-11-13 10:42:11 +0100117 return twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, val, reg);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300118}
119
120static int twl4030_clear_set_boot_bci(u8 clear, u8 set)
121{
Peter Ujfalusie9f14c12012-11-13 10:42:11 +0100122 return twl4030_clear_set(TWL_MODULE_PM_MASTER, clear,
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300123 TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set,
124 TWL4030_PM_MASTER_BOOT_BCI);
125}
126
127static 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 */
150static int twl4030_bci_have_vbus(struct twl4030_bci *bci)
151{
152 int ret;
153 u8 hwsts;
154
Peter Ujfalusie9f14c12012-11-13 10:42:11 +0100155 ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &hwsts,
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300156 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/*
NeilBrown9c645d22012-05-09 07:40:39 +1000170 * Enable/Disable USB Charge functionality.
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300171 */
172static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
173{
174 int ret;
175
176 if (enable) {
NeilBrown9c645d22012-05-09 07:40:39 +1000177 /* Check for USB charger connected */
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300178 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
NeilBrownab378132012-05-09 07:40:40 +1000190 /* Need to keep regulator on */
191 if (!bci->usb_enabled) {
Peter Ujfalusi697be362013-08-21 11:31:37 +0300192 ret = regulator_enable(bci->usb_reg);
193 if (ret) {
194 dev_err(bci->dev,
195 "Failed to enable regulator\n");
196 return ret;
197 }
NeilBrownab378132012-05-09 07:40:40 +1000198 bci->usb_enabled = 1;
199 }
200
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300201 /* 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 */
Peter Ujfalusie9f14c12012-11-13 10:42:11 +0100207 ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0,
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300208 TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
209 } else {
210 ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0);
NeilBrownab378132012-05-09 07:40:40 +1000211 if (bci->usb_enabled) {
212 regulator_disable(bci->usb_reg);
213 bci->usb_enabled = 0;
214 }
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300215 }
216
217 return ret;
218}
219
220/*
221 * Enable/Disable AC Charge funtionality.
222 */
223static 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
235/*
NeilBrown210d4bc2012-05-09 07:40:40 +1000236 * Enable/Disable charging of Backup Battery.
237 */
238static 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 */
Peter Ujfalusie9f14c12012-11-13 10:42:11 +0100246 ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER,
NeilBrown210d4bc2012-05-09 07:40:40 +1000247 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
Peter Ujfalusie9f14c12012-11-13 10:42:11 +0100270 ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER,
NeilBrown210d4bc2012-05-09 07:40:40 +1000271 TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK,
272 flags,
273 TWL4030_BB_CFG);
274
275 return ret;
276}
277
278/*
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300279 * TWL4030 CHG_PRES (AC charger presence) events
280 */
281static 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 */
295static 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
Heikki Krogerusd6ccc442011-02-25 13:56:36 +0200338static void twl4030_bci_usb_work(struct work_struct *data)
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300339{
Heikki Krogerusd6ccc442011-02-25 13:56:36 +0200340 struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300341
Heikki Krogerusd6ccc442011-02-25 13:56:36 +0200342 switch (bci->event) {
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300343 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 }
Heikki Krogerusd6ccc442011-02-25 13:56:36 +0200351}
352
353static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val,
354 void *priv)
355{
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200356 struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, usb_nb);
Heikki Krogerusd6ccc442011-02-25 13:56:36 +0200357
358 dev_dbg(bci->dev, "OTG notify %lu\n", val);
359
360 bci->event = val;
361 schedule_work(&bci->work);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300362
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 */
374static 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 */
399static 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
415static 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
427static 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
491static 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
NeilBrownec0b3802013-10-31 17:05:50 +1100498#ifdef CONFIG_OF
499static const struct twl4030_bci_platform_data *
500twl4030_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
519static inline const struct twl4030_bci_platform_data *
520twl4030_bci_parse_dt(struct device *dev)
521{
522 return NULL;
523}
524#endif
525
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300526static int __init twl4030_bci_probe(struct platform_device *pdev)
527{
528 struct twl4030_bci *bci;
NeilBrownec0b3802013-10-31 17:05:50 +1100529 const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300530 int ret;
Grazvydas Ignotas28d48f02011-06-03 14:43:11 +0300531 u32 reg;
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300532
533 bci = kzalloc(sizeof(*bci), GFP_KERNEL);
534 if (bci == NULL)
535 return -ENOMEM;
536
NeilBrownec0b3802013-10-31 17:05:50 +1100537 if (!pdata)
538 pdata = twl4030_bci_parse_dt(&pdev->dev);
539
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300540 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
NeilBrownab378132012-05-09 07:40:40 +1000564 bci->usb_reg = regulator_get(bci->dev, "bci3v1");
565
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300566 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,
Fengguang Wua2778b02012-08-23 19:56:43 +0800573 twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name,
574 bci);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300575 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,
Fengguang Wua2778b02012-08-23 19:56:43 +0800582 twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300583 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
Heikki Krogerusd6ccc442011-02-25 13:56:36 +0200589 INIT_WORK(&bci->work, twl4030_bci_usb_work);
590
Kishon Vijay Abraham I662dca52012-06-22 17:02:46 +0530591 bci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
Kishon Vijay Abraham Ided017e2012-06-26 17:40:32 +0530592 if (!IS_ERR_OR_NULL(bci->transceiver)) {
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200593 bci->usb_nb.notifier_call = twl4030_bci_usb_ncb;
594 usb_register_notifier(bci->transceiver, &bci->usb_nb);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300595 }
596
597 /* Enable interrupts now. */
Grazvydas Ignotas28d48f02011-06-03 14:43:11 +0300598 reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 |
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300599 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
Grazvydas Ignotas28d48f02011-06-03 14:43:11 +0300607 reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300608 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);
NeilBrownec0b3802013-10-31 17:05:50 +1100615 if (pdata)
616 twl4030_charger_enable_backup(pdata->bb_uvolt,
617 pdata->bb_uamp);
618 else
619 twl4030_charger_enable_backup(0, 0);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300620
621 return 0;
622
623fail_unmask_interrupts:
Kishon Vijay Abraham Ided017e2012-06-26 17:40:32 +0530624 if (!IS_ERR_OR_NULL(bci->transceiver)) {
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200625 usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
Kishon Vijay Abraham I721002e2012-06-22 17:02:45 +0530626 usb_put_phy(bci->transceiver);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300627 }
628 free_irq(bci->irq_bci, bci);
629fail_bci_irq:
630 free_irq(bci->irq_chg, bci);
631fail_chg_irq:
632 power_supply_unregister(&bci->usb);
633fail_register_usb:
634 power_supply_unregister(&bci->ac);
635fail_register_ac:
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300636 kfree(bci);
637
638 return ret;
639}
640
641static 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);
NeilBrown210d4bc2012-05-09 07:40:40 +1000647 twl4030_charger_enable_backup(0, 0);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300648
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
Kishon Vijay Abraham Ided017e2012-06-26 17:40:32 +0530655 if (!IS_ERR_OR_NULL(bci->transceiver)) {
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200656 usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
Kishon Vijay Abraham I721002e2012-06-22 17:02:45 +0530657 usb_put_phy(bci->transceiver);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300658 }
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);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300663 kfree(bci);
664
665 return 0;
666}
667
NeilBrownec0b3802013-10-31 17:05:50 +1100668static const struct of_device_id twl_bci_of_match[] = {
669 {.compatible = "ti,twl4030-bci", },
670 { }
671};
672MODULE_DEVICE_TABLE(of, twl_bci_of_match);
673
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300674static struct platform_driver twl4030_bci_driver = {
675 .driver = {
676 .name = "twl4030_bci",
677 .owner = THIS_MODULE,
NeilBrownec0b3802013-10-31 17:05:50 +1100678 .of_match_table = of_match_ptr(twl_bci_of_match),
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300679 },
680 .remove = __exit_p(twl4030_bci_remove),
681};
682
Jingoo Han4420dc22013-03-05 13:01:36 +0900683module_platform_driver_probe(twl4030_bci_driver, twl4030_bci_probe);
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300684
Grazvydas Ignotas28d48f02011-06-03 14:43:11 +0300685MODULE_AUTHOR("Gražvydas Ignotas");
Grazvydas Ignotas2e727f12010-09-27 23:18:24 +0300686MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver");
687MODULE_LICENSE("GPL");
688MODULE_ALIAS("platform:twl4030_bci");