Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2e727f17 GI |
2 | /* |
3 | * TWL4030/TPS65950 BCI (Battery Charger Interface) driver | |
4 | * | |
5 | * Copyright (C) 2010 Gražvydas Ignotas <notasas@gmail.com> | |
6 | * | |
7 | * based on twl4030_bci_battery.c by TI | |
8 | * Copyright (C) 2008 Texas Instruments, Inc. | |
2e727f17 GI |
9 | */ |
10 | ||
11 | #include <linux/init.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/slab.h> | |
ded017ee | 14 | #include <linux/err.h> |
2e727f17 GI |
15 | #include <linux/platform_device.h> |
16 | #include <linux/interrupt.h> | |
a2054256 | 17 | #include <linux/mfd/twl.h> |
2e727f17 GI |
18 | #include <linux/power_supply.h> |
19 | #include <linux/notifier.h> | |
20 | #include <linux/usb/otg.h> | |
2202e1fc | 21 | #include <linux/iio/consumer.h> |
2e727f17 | 22 | |
7f4a633d N |
23 | #define TWL4030_BCIMDEN 0x00 |
24 | #define TWL4030_BCIMDKEY 0x01 | |
2e727f17 GI |
25 | #define TWL4030_BCIMSTATEC 0x02 |
26 | #define TWL4030_BCIICHG 0x08 | |
27 | #define TWL4030_BCIVAC 0x0a | |
28 | #define TWL4030_BCIVBUS 0x0c | |
61a7784e | 29 | #define TWL4030_BCIMFSTS3 0x0F |
2e727f17 GI |
30 | #define TWL4030_BCIMFSTS4 0x10 |
31 | #define TWL4030_BCICTL1 0x23 | |
210d4bc8 | 32 | #define TWL4030_BB_CFG 0x12 |
1098cb58 N |
33 | #define TWL4030_BCIIREF1 0x27 |
34 | #define TWL4030_BCIIREF2 0x28 | |
35 | #define TWL4030_BCIMFKEY 0x11 | |
7f4a633d | 36 | #define TWL4030_BCIMFEN3 0x14 |
1098cb58 N |
37 | #define TWL4030_BCIMFTH8 0x1d |
38 | #define TWL4030_BCIMFTH9 0x1e | |
7f4a633d | 39 | #define TWL4030_BCIWDKEY 0x21 |
2e727f17 | 40 | |
61a7784e NM |
41 | #define TWL4030_BCIMFSTS1 0x01 |
42 | ||
2e727f17 GI |
43 | #define TWL4030_BCIAUTOWEN BIT(5) |
44 | #define TWL4030_CONFIG_DONE BIT(4) | |
7f4a633d | 45 | #define TWL4030_CVENAC BIT(2) |
2e727f17 GI |
46 | #define TWL4030_BCIAUTOUSB BIT(1) |
47 | #define TWL4030_BCIAUTOAC BIT(0) | |
48 | #define TWL4030_CGAIN BIT(5) | |
49 | #define TWL4030_USBFASTMCHG BIT(2) | |
50 | #define TWL4030_STS_VBUS BIT(7) | |
51 | #define TWL4030_STS_USB_ID BIT(2) | |
210d4bc8 | 52 | #define TWL4030_BBCHEN BIT(4) |
94b05cab IH |
53 | #define TWL4030_BBSEL_MASK 0x0c |
54 | #define TWL4030_BBSEL_2V5 0x00 | |
55 | #define TWL4030_BBSEL_3V0 0x04 | |
56 | #define TWL4030_BBSEL_3V1 0x08 | |
57 | #define TWL4030_BBSEL_3V2 0x0c | |
58 | #define TWL4030_BBISEL_MASK 0x03 | |
59 | #define TWL4030_BBISEL_25uA 0x00 | |
60 | #define TWL4030_BBISEL_150uA 0x01 | |
61 | #define TWL4030_BBISEL_500uA 0x02 | |
62 | #define TWL4030_BBISEL_1000uA 0x03 | |
2e727f17 | 63 | |
61a7784e NM |
64 | #define TWL4030_BATSTSPCHG BIT(2) |
65 | #define TWL4030_BATSTSMCHG BIT(6) | |
66 | ||
2e727f17 GI |
67 | /* BCI interrupts */ |
68 | #define TWL4030_WOVF BIT(0) /* Watchdog overflow */ | |
69 | #define TWL4030_TMOVF BIT(1) /* Timer overflow */ | |
70 | #define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */ | |
71 | #define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */ | |
72 | #define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */ | |
73 | #define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */ | |
74 | #define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */ | |
75 | #define TWL4030_BATSTS BIT(7) /* Battery status */ | |
76 | ||
77 | #define TWL4030_VBATLVL BIT(0) /* VBAT level */ | |
78 | #define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */ | |
79 | #define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */ | |
80 | #define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */ | |
81 | ||
82 | #define TWL4030_MSTATEC_USB BIT(4) | |
83 | #define TWL4030_MSTATEC_AC BIT(5) | |
84 | #define TWL4030_MSTATEC_MASK 0x0f | |
85 | #define TWL4030_MSTATEC_QUICK1 0x02 | |
86 | #define TWL4030_MSTATEC_QUICK7 0x07 | |
87 | #define TWL4030_MSTATEC_COMPLETE1 0x0b | |
88 | #define TWL4030_MSTATEC_COMPLETE4 0x0e | |
89 | ||
b49d15d1 N |
90 | /* |
91 | * If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11) | |
92 | * then AC is available. | |
93 | */ | |
2202e1fc | 94 | static inline int ac_available(struct iio_channel *channel_vac) |
b49d15d1 | 95 | { |
2202e1fc MB |
96 | int val, err; |
97 | ||
98 | if (!channel_vac) | |
99 | return 0; | |
100 | ||
101 | err = iio_read_channel_processed(channel_vac, &val); | |
102 | if (err < 0) | |
103 | return 0; | |
104 | return val > 4500; | |
b49d15d1 | 105 | } |
2202e1fc | 106 | |
2e727f17 | 107 | static bool allow_usb; |
28d48f04 | 108 | module_param(allow_usb, bool, 0644); |
2e727f17 GI |
109 | MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current"); |
110 | ||
111 | struct twl4030_bci { | |
112 | struct device *dev; | |
297d716f KK |
113 | struct power_supply *ac; |
114 | struct power_supply *usb; | |
86753811 | 115 | struct usb_phy *transceiver; |
fcc8ebc9 | 116 | struct notifier_block usb_nb; |
d6ccc442 | 117 | struct work_struct work; |
2e727f17 GI |
118 | int irq_chg; |
119 | int irq_bci; | |
ab37813f | 120 | int usb_enabled; |
d6ccc442 | 121 | |
1098cb58 | 122 | /* |
e4ae537e N |
123 | * ichg_* and *_cur values in uA. If any are 'large', we set |
124 | * CGAIN to '1' which doubles the range for half the | |
125 | * precision. | |
1098cb58 | 126 | */ |
e4ae537e N |
127 | unsigned int ichg_eoc, ichg_lo, ichg_hi; |
128 | unsigned int usb_cur, ac_cur; | |
2202e1fc | 129 | struct iio_channel *channel_vac; |
e4ae537e | 130 | bool ac_is_active; |
b04b908d | 131 | int usb_mode, ac_mode; /* charging mode requested */ |
22d4c33f N |
132 | #define CHARGE_OFF 0 |
133 | #define CHARGE_AUTO 1 | |
7f4a633d | 134 | #define CHARGE_LINEAR 2 |
1098cb58 | 135 | |
21ae4040 N |
136 | /* When setting the USB current we slowly increase the |
137 | * requested current until target is reached or the voltage | |
138 | * drops below 4.75V. In the latter case we step back one | |
139 | * step. | |
140 | */ | |
141 | unsigned int usb_cur_target; | |
142 | struct delayed_work current_worker; | |
143 | #define USB_CUR_STEP 20000 /* 20mA at a time */ | |
144 | #define USB_MIN_VOLT 4750000 /* 4.75V */ | |
145 | #define USB_CUR_DELAY msecs_to_jiffies(100) | |
146 | #define USB_MAX_CURRENT 1700000 /* TWL4030 caps at 1.7A */ | |
147 | ||
d6ccc442 | 148 | unsigned long event; |
2e727f17 GI |
149 | }; |
150 | ||
22d4c33f | 151 | /* strings for 'usb_mode' values */ |
37853952 | 152 | static const char *modes[] = { "off", "auto", "continuous" }; |
22d4c33f | 153 | |
2e727f17 GI |
154 | /* |
155 | * clear and set bits on an given register on a given module | |
156 | */ | |
157 | static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg) | |
158 | { | |
159 | u8 val = 0; | |
160 | int ret; | |
161 | ||
162 | ret = twl_i2c_read_u8(mod_no, &val, reg); | |
163 | if (ret) | |
164 | return ret; | |
165 | ||
166 | val &= ~clear; | |
167 | val |= set; | |
168 | ||
169 | return twl_i2c_write_u8(mod_no, val, reg); | |
170 | } | |
171 | ||
172 | static int twl4030_bci_read(u8 reg, u8 *val) | |
173 | { | |
e9f14c18 | 174 | return twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, val, reg); |
2e727f17 GI |
175 | } |
176 | ||
177 | static int twl4030_clear_set_boot_bci(u8 clear, u8 set) | |
178 | { | |
e9f14c18 | 179 | return twl4030_clear_set(TWL_MODULE_PM_MASTER, clear, |
2e727f17 GI |
180 | TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set, |
181 | TWL4030_PM_MASTER_BOOT_BCI); | |
182 | } | |
183 | ||
184 | static int twl4030bci_read_adc_val(u8 reg) | |
185 | { | |
186 | int ret, temp; | |
187 | u8 val; | |
188 | ||
189 | /* read MSB */ | |
190 | ret = twl4030_bci_read(reg + 1, &val); | |
191 | if (ret) | |
192 | return ret; | |
193 | ||
194 | temp = (int)(val & 0x03) << 8; | |
195 | ||
196 | /* read LSB */ | |
197 | ret = twl4030_bci_read(reg, &val); | |
198 | if (ret) | |
199 | return ret; | |
200 | ||
201 | return temp | val; | |
202 | } | |
203 | ||
3b542f08 N |
204 | /* |
205 | * TI provided formulas: | |
206 | * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85 | |
207 | * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7 | |
208 | * Here we use integer approximation of: | |
209 | * CGAIN == 0: val * 1.6618 - 0.85 * 1000 | |
210 | * CGAIN == 1: (val * 1.6618 - 0.85 * 1000) * 2 | |
211 | */ | |
212 | /* | |
213 | * convert twl register value for currents into uA | |
214 | */ | |
215 | static int regval2ua(int regval, bool cgain) | |
216 | { | |
217 | if (cgain) | |
218 | return (regval * 16618 - 8500 * 1000) / 5; | |
219 | else | |
220 | return (regval * 16618 - 8500 * 1000) / 10; | |
221 | } | |
222 | ||
223 | /* | |
224 | * convert uA currents into twl register value | |
225 | */ | |
226 | static int ua2regval(int ua, bool cgain) | |
227 | { | |
228 | int ret; | |
229 | if (cgain) | |
230 | ua /= 2; | |
231 | ret = (ua * 10 + 8500 * 1000) / 16618; | |
232 | /* rounding problems */ | |
233 | if (ret < 512) | |
234 | ret = 512; | |
235 | return ret; | |
236 | } | |
237 | ||
1098cb58 N |
238 | static int twl4030_charger_update_current(struct twl4030_bci *bci) |
239 | { | |
240 | int status; | |
e4ae537e | 241 | int cur; |
1098cb58 N |
242 | unsigned reg, cur_reg; |
243 | u8 bcictl1, oldreg, fullreg; | |
244 | bool cgain = false; | |
245 | u8 boot_bci; | |
246 | ||
e4ae537e N |
247 | /* |
248 | * If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11) | |
249 | * and AC is enabled, set current for 'ac' | |
250 | */ | |
2202e1fc | 251 | if (ac_available(bci->channel_vac)) { |
e4ae537e N |
252 | cur = bci->ac_cur; |
253 | bci->ac_is_active = true; | |
254 | } else { | |
255 | cur = bci->usb_cur; | |
256 | bci->ac_is_active = false; | |
21ae4040 N |
257 | if (cur > bci->usb_cur_target) { |
258 | cur = bci->usb_cur_target; | |
259 | bci->usb_cur = cur; | |
260 | } | |
261 | if (cur < bci->usb_cur_target) | |
262 | schedule_delayed_work(&bci->current_worker, USB_CUR_DELAY); | |
e4ae537e N |
263 | } |
264 | ||
1098cb58 N |
265 | /* First, check thresholds and see if cgain is needed */ |
266 | if (bci->ichg_eoc >= 200000) | |
267 | cgain = true; | |
268 | if (bci->ichg_lo >= 400000) | |
269 | cgain = true; | |
270 | if (bci->ichg_hi >= 820000) | |
271 | cgain = true; | |
e4ae537e | 272 | if (cur > 852000) |
1098cb58 N |
273 | cgain = true; |
274 | ||
275 | status = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); | |
276 | if (status < 0) | |
277 | return status; | |
278 | if (twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &boot_bci, | |
279 | TWL4030_PM_MASTER_BOOT_BCI) < 0) | |
280 | boot_bci = 0; | |
281 | boot_bci &= 7; | |
282 | ||
283 | if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN)) | |
284 | /* Need to turn for charging while we change the | |
285 | * CGAIN bit. Leave it off while everything is | |
286 | * updated. | |
287 | */ | |
288 | twl4030_clear_set_boot_bci(boot_bci, 0); | |
289 | ||
290 | /* | |
291 | * For ichg_eoc, the hardware only supports reg values matching | |
292 | * 100XXXX000, and requires the XXXX be stored in the high nibble | |
293 | * of TWL4030_BCIMFTH8. | |
294 | */ | |
295 | reg = ua2regval(bci->ichg_eoc, cgain); | |
296 | if (reg > 0x278) | |
297 | reg = 0x278; | |
298 | if (reg < 0x200) | |
299 | reg = 0x200; | |
300 | reg = (reg >> 3) & 0xf; | |
301 | fullreg = reg << 4; | |
302 | ||
303 | /* | |
304 | * For ichg_lo, reg value must match 10XXXX0000. | |
305 | * XXXX is stored in low nibble of TWL4030_BCIMFTH8. | |
306 | */ | |
307 | reg = ua2regval(bci->ichg_lo, cgain); | |
308 | if (reg > 0x2F0) | |
309 | reg = 0x2F0; | |
310 | if (reg < 0x200) | |
311 | reg = 0x200; | |
312 | reg = (reg >> 4) & 0xf; | |
313 | fullreg |= reg; | |
314 | ||
315 | /* ichg_eoc and ichg_lo live in same register */ | |
316 | status = twl4030_bci_read(TWL4030_BCIMFTH8, &oldreg); | |
317 | if (status < 0) | |
318 | return status; | |
319 | if (oldreg != fullreg) { | |
320 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xF4, | |
321 | TWL4030_BCIMFKEY); | |
322 | if (status < 0) | |
323 | return status; | |
324 | twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
325 | fullreg, TWL4030_BCIMFTH8); | |
326 | } | |
327 | ||
328 | /* ichg_hi threshold must be 1XXXX01100 (I think) */ | |
329 | reg = ua2regval(bci->ichg_hi, cgain); | |
330 | if (reg > 0x3E0) | |
331 | reg = 0x3E0; | |
332 | if (reg < 0x200) | |
333 | reg = 0x200; | |
334 | fullreg = (reg >> 5) & 0xF; | |
335 | fullreg <<= 4; | |
336 | status = twl4030_bci_read(TWL4030_BCIMFTH9, &oldreg); | |
337 | if (status < 0) | |
338 | return status; | |
339 | if ((oldreg & 0xF0) != fullreg) { | |
340 | fullreg |= (oldreg & 0x0F); | |
341 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, | |
342 | TWL4030_BCIMFKEY); | |
343 | if (status < 0) | |
344 | return status; | |
345 | twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
346 | fullreg, TWL4030_BCIMFTH9); | |
347 | } | |
348 | ||
349 | /* | |
350 | * And finally, set the current. This is stored in | |
351 | * two registers. | |
352 | */ | |
e4ae537e | 353 | reg = ua2regval(cur, cgain); |
1098cb58 N |
354 | /* we have only 10 bits */ |
355 | if (reg > 0x3ff) | |
356 | reg = 0x3ff; | |
357 | status = twl4030_bci_read(TWL4030_BCIIREF1, &oldreg); | |
358 | if (status < 0) | |
359 | return status; | |
360 | cur_reg = oldreg; | |
361 | status = twl4030_bci_read(TWL4030_BCIIREF2, &oldreg); | |
362 | if (status < 0) | |
363 | return status; | |
364 | cur_reg |= oldreg << 8; | |
365 | if (reg != oldreg) { | |
366 | /* disable write protection for one write access for | |
367 | * BCIIREF */ | |
368 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, | |
369 | TWL4030_BCIMFKEY); | |
370 | if (status < 0) | |
371 | return status; | |
372 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
373 | (reg & 0x100) ? 3 : 2, | |
374 | TWL4030_BCIIREF2); | |
375 | if (status < 0) | |
376 | return status; | |
377 | /* disable write protection for one write access for | |
378 | * BCIIREF */ | |
379 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, | |
380 | TWL4030_BCIMFKEY); | |
381 | if (status < 0) | |
382 | return status; | |
383 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
384 | reg & 0xff, | |
385 | TWL4030_BCIIREF1); | |
386 | } | |
387 | if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN)) { | |
388 | /* Flip CGAIN and re-enable charging */ | |
389 | bcictl1 ^= TWL4030_CGAIN; | |
390 | twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
391 | bcictl1, TWL4030_BCICTL1); | |
392 | twl4030_clear_set_boot_bci(0, boot_bci); | |
393 | } | |
394 | return 0; | |
395 | } | |
396 | ||
21ae4040 N |
397 | static int twl4030_charger_get_current(void); |
398 | ||
399 | static void twl4030_current_worker(struct work_struct *data) | |
400 | { | |
401 | int v, curr; | |
402 | int res; | |
403 | struct twl4030_bci *bci = container_of(data, struct twl4030_bci, | |
404 | current_worker.work); | |
405 | ||
406 | res = twl4030bci_read_adc_val(TWL4030_BCIVBUS); | |
407 | if (res < 0) | |
408 | v = 0; | |
409 | else | |
410 | /* BCIVBUS uses ADCIN8, 7/1023 V/step */ | |
411 | v = res * 6843; | |
412 | curr = twl4030_charger_get_current(); | |
413 | ||
414 | dev_dbg(bci->dev, "v=%d cur=%d limit=%d target=%d\n", v, curr, | |
415 | bci->usb_cur, bci->usb_cur_target); | |
416 | ||
417 | if (v < USB_MIN_VOLT) { | |
418 | /* Back up and stop adjusting. */ | |
8314c212 AK |
419 | if (bci->usb_cur >= USB_CUR_STEP) |
420 | bci->usb_cur -= USB_CUR_STEP; | |
21ae4040 N |
421 | bci->usb_cur_target = bci->usb_cur; |
422 | } else if (bci->usb_cur >= bci->usb_cur_target || | |
423 | bci->usb_cur + USB_CUR_STEP > USB_MAX_CURRENT) { | |
424 | /* Reached target and voltage is OK - stop */ | |
425 | return; | |
426 | } else { | |
427 | bci->usb_cur += USB_CUR_STEP; | |
428 | schedule_delayed_work(&bci->current_worker, USB_CUR_DELAY); | |
429 | } | |
430 | twl4030_charger_update_current(bci); | |
431 | } | |
432 | ||
2e727f17 | 433 | /* |
9c645d2f | 434 | * Enable/Disable USB Charge functionality. |
2e727f17 GI |
435 | */ |
436 | static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) | |
437 | { | |
438 | int ret; | |
079cdff3 | 439 | u32 reg; |
2e727f17 | 440 | |
22d4c33f N |
441 | if (bci->usb_mode == CHARGE_OFF) |
442 | enable = false; | |
e57c4a67 | 443 | if (enable && !IS_ERR_OR_NULL(bci->transceiver)) { |
2e727f17 | 444 | |
e4ae537e N |
445 | twl4030_charger_update_current(bci); |
446 | ||
e57c4a67 | 447 | /* Need to keep phy powered */ |
ab37813f | 448 | if (!bci->usb_enabled) { |
e57c4a67 | 449 | pm_runtime_get_sync(bci->transceiver->dev); |
ab37813f N |
450 | bci->usb_enabled = 1; |
451 | } | |
452 | ||
079cdff3 AK |
453 | if (bci->usb_mode == CHARGE_AUTO) { |
454 | /* Enable interrupts now. */ | |
455 | reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | | |
456 | TWL4030_TBATOR2 | TWL4030_TBATOR1 | | |
457 | TWL4030_BATSTS); | |
458 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, | |
459 | TWL4030_INTERRUPTS_BCIIMR1A); | |
460 | if (ret < 0) { | |
461 | dev_err(bci->dev, | |
462 | "failed to unmask interrupts: %d\n", | |
463 | ret); | |
464 | return ret; | |
465 | } | |
7f4a633d N |
466 | /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */ |
467 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB); | |
079cdff3 | 468 | } |
2e727f17 GI |
469 | |
470 | /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */ | |
e9f14c18 | 471 | ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0, |
2e727f17 | 472 | TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4); |
7f4a633d | 473 | if (bci->usb_mode == CHARGE_LINEAR) { |
079cdff3 AK |
474 | /* Enable interrupts now. */ |
475 | reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_TBATOR2 | | |
476 | TWL4030_TBATOR1 | TWL4030_BATSTS); | |
477 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, | |
478 | TWL4030_INTERRUPTS_BCIIMR1A); | |
479 | if (ret < 0) { | |
480 | dev_err(bci->dev, | |
481 | "failed to unmask interrupts: %d\n", | |
482 | ret); | |
483 | return ret; | |
484 | } | |
7f4a633d N |
485 | twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC|TWL4030_CVENAC, 0); |
486 | /* Watch dog key: WOVF acknowledge */ | |
487 | ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x33, | |
488 | TWL4030_BCIWDKEY); | |
489 | /* 0x24 + EKEY6: off mode */ | |
490 | ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x2a, | |
491 | TWL4030_BCIMDKEY); | |
492 | /* EKEY2: Linear charge: USB path */ | |
493 | ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x26, | |
494 | TWL4030_BCIMDKEY); | |
495 | /* WDKEY5: stop watchdog count */ | |
496 | ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xf3, | |
497 | TWL4030_BCIWDKEY); | |
498 | /* enable MFEN3 access */ | |
499 | ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x9c, | |
500 | TWL4030_BCIMFKEY); | |
501 | /* ICHGEOCEN - end-of-charge monitor (current < 80mA) | |
502 | * (charging continues) | |
503 | * ICHGLOWEN - current level monitor (charge continues) | |
504 | * don't monitor over-current or heat save | |
505 | */ | |
506 | ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xf0, | |
507 | TWL4030_BCIMFEN3); | |
508 | } | |
2e727f17 GI |
509 | } else { |
510 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0); | |
7f4a633d N |
511 | ret |= twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x2a, |
512 | TWL4030_BCIMDKEY); | |
ab37813f | 513 | if (bci->usb_enabled) { |
e57c4a67 N |
514 | pm_runtime_mark_last_busy(bci->transceiver->dev); |
515 | pm_runtime_put_autosuspend(bci->transceiver->dev); | |
ab37813f N |
516 | bci->usb_enabled = 0; |
517 | } | |
21ae4040 | 518 | bci->usb_cur = 0; |
2e727f17 GI |
519 | } |
520 | ||
521 | return ret; | |
522 | } | |
523 | ||
524 | /* | |
525 | * Enable/Disable AC Charge funtionality. | |
526 | */ | |
b04b908d | 527 | static int twl4030_charger_enable_ac(struct twl4030_bci *bci, bool enable) |
2e727f17 GI |
528 | { |
529 | int ret; | |
530 | ||
b04b908d N |
531 | if (bci->ac_mode == CHARGE_OFF) |
532 | enable = false; | |
533 | ||
2e727f17 GI |
534 | if (enable) |
535 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC); | |
536 | else | |
537 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0); | |
538 | ||
539 | return ret; | |
540 | } | |
541 | ||
210d4bc8 N |
542 | /* |
543 | * Enable/Disable charging of Backup Battery. | |
544 | */ | |
545 | static int twl4030_charger_enable_backup(int uvolt, int uamp) | |
546 | { | |
547 | int ret; | |
548 | u8 flags; | |
549 | ||
550 | if (uvolt < 2500000 || | |
551 | uamp < 25) { | |
552 | /* disable charging of backup battery */ | |
e9f14c18 | 553 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
210d4bc8 N |
554 | TWL4030_BBCHEN, 0, TWL4030_BB_CFG); |
555 | return ret; | |
556 | } | |
557 | ||
558 | flags = TWL4030_BBCHEN; | |
559 | if (uvolt >= 3200000) | |
560 | flags |= TWL4030_BBSEL_3V2; | |
561 | else if (uvolt >= 3100000) | |
562 | flags |= TWL4030_BBSEL_3V1; | |
563 | else if (uvolt >= 3000000) | |
564 | flags |= TWL4030_BBSEL_3V0; | |
565 | else | |
566 | flags |= TWL4030_BBSEL_2V5; | |
567 | ||
568 | if (uamp >= 1000) | |
569 | flags |= TWL4030_BBISEL_1000uA; | |
570 | else if (uamp >= 500) | |
571 | flags |= TWL4030_BBISEL_500uA; | |
572 | else if (uamp >= 150) | |
573 | flags |= TWL4030_BBISEL_150uA; | |
574 | else | |
575 | flags |= TWL4030_BBISEL_25uA; | |
576 | ||
e9f14c18 | 577 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
210d4bc8 N |
578 | TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK, |
579 | flags, | |
580 | TWL4030_BB_CFG); | |
581 | ||
582 | return ret; | |
583 | } | |
584 | ||
2e727f17 GI |
585 | /* |
586 | * TWL4030 CHG_PRES (AC charger presence) events | |
587 | */ | |
588 | static irqreturn_t twl4030_charger_interrupt(int irq, void *arg) | |
589 | { | |
590 | struct twl4030_bci *bci = arg; | |
591 | ||
592 | dev_dbg(bci->dev, "CHG_PRES irq\n"); | |
aca3c354 N |
593 | /* reset current on each 'plug' event */ |
594 | bci->ac_cur = 500000; | |
e4ae537e | 595 | twl4030_charger_update_current(bci); |
297d716f KK |
596 | power_supply_changed(bci->ac); |
597 | power_supply_changed(bci->usb); | |
2e727f17 GI |
598 | |
599 | return IRQ_HANDLED; | |
600 | } | |
601 | ||
602 | /* | |
603 | * TWL4030 BCI monitoring events | |
604 | */ | |
605 | static irqreturn_t twl4030_bci_interrupt(int irq, void *arg) | |
606 | { | |
607 | struct twl4030_bci *bci = arg; | |
608 | u8 irqs1, irqs2; | |
609 | int ret; | |
610 | ||
611 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1, | |
612 | TWL4030_INTERRUPTS_BCIISR1A); | |
613 | if (ret < 0) | |
614 | return IRQ_HANDLED; | |
615 | ||
616 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2, | |
617 | TWL4030_INTERRUPTS_BCIISR2A); | |
618 | if (ret < 0) | |
619 | return IRQ_HANDLED; | |
620 | ||
621 | dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1); | |
622 | ||
623 | if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) { | |
624 | /* charger state change, inform the core */ | |
297d716f KK |
625 | power_supply_changed(bci->ac); |
626 | power_supply_changed(bci->usb); | |
2e727f17 | 627 | } |
e4ae537e | 628 | twl4030_charger_update_current(bci); |
2e727f17 GI |
629 | |
630 | /* various monitoring events, for now we just log them here */ | |
631 | if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1)) | |
632 | dev_warn(bci->dev, "battery temperature out of range\n"); | |
633 | ||
634 | if (irqs1 & TWL4030_BATSTS) | |
635 | dev_crit(bci->dev, "battery disconnected\n"); | |
636 | ||
637 | if (irqs2 & TWL4030_VBATOV) | |
638 | dev_crit(bci->dev, "VBAT overvoltage\n"); | |
639 | ||
640 | if (irqs2 & TWL4030_VBUSOV) | |
641 | dev_crit(bci->dev, "VBUS overvoltage\n"); | |
642 | ||
643 | if (irqs2 & TWL4030_ACCHGOV) | |
644 | dev_crit(bci->dev, "Ac charger overvoltage\n"); | |
645 | ||
646 | return IRQ_HANDLED; | |
647 | } | |
648 | ||
d6ccc442 | 649 | static void twl4030_bci_usb_work(struct work_struct *data) |
2e727f17 | 650 | { |
d6ccc442 | 651 | struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work); |
2e727f17 | 652 | |
d6ccc442 | 653 | switch (bci->event) { |
2e727f17 GI |
654 | case USB_EVENT_VBUS: |
655 | case USB_EVENT_CHARGER: | |
656 | twl4030_charger_enable_usb(bci, true); | |
657 | break; | |
658 | case USB_EVENT_NONE: | |
659 | twl4030_charger_enable_usb(bci, false); | |
660 | break; | |
661 | } | |
d6ccc442 HK |
662 | } |
663 | ||
664 | static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val, | |
665 | void *priv) | |
666 | { | |
fcc8ebc9 | 667 | struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, usb_nb); |
d6ccc442 HK |
668 | |
669 | dev_dbg(bci->dev, "OTG notify %lu\n", val); | |
670 | ||
aca3c354 N |
671 | /* reset current on each 'plug' event */ |
672 | if (allow_usb) | |
21ae4040 | 673 | bci->usb_cur_target = 500000; |
aca3c354 | 674 | else |
21ae4040 | 675 | bci->usb_cur_target = 100000; |
aca3c354 | 676 | |
d6ccc442 HK |
677 | bci->event = val; |
678 | schedule_work(&bci->work); | |
2e727f17 GI |
679 | |
680 | return NOTIFY_OK; | |
681 | } | |
682 | ||
22d4c33f N |
683 | /* |
684 | * sysfs charger enabled store | |
685 | */ | |
686 | static ssize_t | |
687 | twl4030_bci_mode_store(struct device *dev, struct device_attribute *attr, | |
688 | const char *buf, size_t n) | |
689 | { | |
690 | struct twl4030_bci *bci = dev_get_drvdata(dev->parent); | |
691 | int mode; | |
692 | int status; | |
693 | ||
37853952 AS |
694 | mode = sysfs_match_string(modes, buf); |
695 | if (mode < 0) | |
696 | return mode; | |
697 | ||
b04b908d N |
698 | if (dev == &bci->ac->dev) { |
699 | if (mode == 2) | |
700 | return -EINVAL; | |
701 | twl4030_charger_enable_ac(bci, false); | |
702 | bci->ac_mode = mode; | |
703 | status = twl4030_charger_enable_ac(bci, true); | |
704 | } else { | |
705 | twl4030_charger_enable_usb(bci, false); | |
706 | bci->usb_mode = mode; | |
707 | status = twl4030_charger_enable_usb(bci, true); | |
708 | } | |
22d4c33f N |
709 | return (status == 0) ? n : status; |
710 | } | |
711 | ||
712 | /* | |
713 | * sysfs charger enabled show | |
714 | */ | |
715 | static ssize_t | |
716 | twl4030_bci_mode_show(struct device *dev, | |
717 | struct device_attribute *attr, char *buf) | |
718 | { | |
719 | struct twl4030_bci *bci = dev_get_drvdata(dev->parent); | |
720 | int len = 0; | |
721 | int i; | |
b04b908d N |
722 | int mode = bci->usb_mode; |
723 | ||
724 | if (dev == &bci->ac->dev) | |
725 | mode = bci->ac_mode; | |
22d4c33f N |
726 | |
727 | for (i = 0; i < ARRAY_SIZE(modes); i++) | |
b04b908d | 728 | if (mode == i) |
22d4c33f N |
729 | len += snprintf(buf+len, PAGE_SIZE-len, |
730 | "[%s] ", modes[i]); | |
731 | else | |
732 | len += snprintf(buf+len, PAGE_SIZE-len, | |
733 | "%s ", modes[i]); | |
734 | buf[len-1] = '\n'; | |
735 | return len; | |
736 | } | |
737 | static DEVICE_ATTR(mode, 0644, twl4030_bci_mode_show, | |
738 | twl4030_bci_mode_store); | |
739 | ||
2e727f17 GI |
740 | static int twl4030_charger_get_current(void) |
741 | { | |
742 | int curr; | |
743 | int ret; | |
744 | u8 bcictl1; | |
745 | ||
746 | curr = twl4030bci_read_adc_val(TWL4030_BCIICHG); | |
747 | if (curr < 0) | |
748 | return curr; | |
749 | ||
750 | ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); | |
751 | if (ret) | |
752 | return ret; | |
753 | ||
3b542f08 | 754 | return regval2ua(curr, bcictl1 & TWL4030_CGAIN); |
2e727f17 GI |
755 | } |
756 | ||
757 | /* | |
758 | * Returns the main charge FSM state | |
759 | * Or < 0 on failure. | |
760 | */ | |
761 | static int twl4030bci_state(struct twl4030_bci *bci) | |
762 | { | |
763 | int ret; | |
764 | u8 state; | |
765 | ||
766 | ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state); | |
767 | if (ret) { | |
33a70677 | 768 | dev_err(bci->dev, "error reading BCIMSTATEC\n"); |
2e727f17 GI |
769 | return ret; |
770 | } | |
771 | ||
772 | dev_dbg(bci->dev, "state: %02x\n", state); | |
773 | ||
774 | return state; | |
775 | } | |
776 | ||
777 | static int twl4030_bci_state_to_status(int state) | |
778 | { | |
779 | state &= TWL4030_MSTATEC_MASK; | |
780 | if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7) | |
781 | return POWER_SUPPLY_STATUS_CHARGING; | |
782 | else if (TWL4030_MSTATEC_COMPLETE1 <= state && | |
783 | state <= TWL4030_MSTATEC_COMPLETE4) | |
784 | return POWER_SUPPLY_STATUS_FULL; | |
785 | else | |
786 | return POWER_SUPPLY_STATUS_NOT_CHARGING; | |
787 | } | |
788 | ||
789 | static int twl4030_bci_get_property(struct power_supply *psy, | |
790 | enum power_supply_property psp, | |
791 | union power_supply_propval *val) | |
792 | { | |
297d716f | 793 | struct twl4030_bci *bci = dev_get_drvdata(psy->dev.parent); |
2e727f17 GI |
794 | int is_charging; |
795 | int state; | |
796 | int ret; | |
797 | ||
798 | state = twl4030bci_state(bci); | |
799 | if (state < 0) | |
800 | return state; | |
801 | ||
297d716f | 802 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) |
2e727f17 GI |
803 | is_charging = state & TWL4030_MSTATEC_USB; |
804 | else | |
805 | is_charging = state & TWL4030_MSTATEC_AC; | |
7f4a633d N |
806 | if (!is_charging) { |
807 | u8 s; | |
6f12e46e KL |
808 | ret = twl4030_bci_read(TWL4030_BCIMDEN, &s); |
809 | if (ret < 0) | |
810 | return ret; | |
7f4a633d N |
811 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) |
812 | is_charging = s & 1; | |
813 | else | |
814 | is_charging = s & 2; | |
815 | if (is_charging) | |
816 | /* A little white lie */ | |
817 | state = TWL4030_MSTATEC_QUICK1; | |
818 | } | |
2e727f17 GI |
819 | |
820 | switch (psp) { | |
821 | case POWER_SUPPLY_PROP_STATUS: | |
822 | if (is_charging) | |
823 | val->intval = twl4030_bci_state_to_status(state); | |
824 | else | |
825 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
826 | break; | |
827 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
828 | /* charging must be active for meaningful result */ | |
829 | if (!is_charging) | |
830 | return -ENODATA; | |
297d716f | 831 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) { |
2e727f17 GI |
832 | ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS); |
833 | if (ret < 0) | |
834 | return ret; | |
835 | /* BCIVBUS uses ADCIN8, 7/1023 V/step */ | |
836 | val->intval = ret * 6843; | |
837 | } else { | |
838 | ret = twl4030bci_read_adc_val(TWL4030_BCIVAC); | |
839 | if (ret < 0) | |
840 | return ret; | |
841 | /* BCIVAC uses ADCIN11, 10/1023 V/step */ | |
842 | val->intval = ret * 9775; | |
843 | } | |
844 | break; | |
845 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
846 | if (!is_charging) | |
847 | return -ENODATA; | |
848 | /* current measurement is shared between AC and USB */ | |
849 | ret = twl4030_charger_get_current(); | |
850 | if (ret < 0) | |
851 | return ret; | |
852 | val->intval = ret; | |
853 | break; | |
854 | case POWER_SUPPLY_PROP_ONLINE: | |
855 | val->intval = is_charging && | |
856 | twl4030_bci_state_to_status(state) != | |
857 | POWER_SUPPLY_STATUS_NOT_CHARGING; | |
858 | break; | |
3fb319c2 NS |
859 | case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: |
860 | val->intval = -1; | |
861 | if (psy->desc->type != POWER_SUPPLY_TYPE_USB) { | |
862 | if (!bci->ac_is_active) | |
863 | val->intval = bci->ac_cur; | |
864 | } else { | |
865 | if (bci->ac_is_active) | |
866 | val->intval = bci->usb_cur_target; | |
867 | } | |
868 | if (val->intval < 0) { | |
869 | u8 bcictl1; | |
870 | ||
871 | val->intval = twl4030bci_read_adc_val(TWL4030_BCIIREF1); | |
872 | if (val->intval < 0) | |
873 | return val->intval; | |
874 | ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); | |
875 | if (ret < 0) | |
876 | return ret; | |
877 | val->intval = regval2ua(val->intval, bcictl1 & | |
878 | TWL4030_CGAIN); | |
879 | } | |
880 | break; | |
2e727f17 GI |
881 | default: |
882 | return -EINVAL; | |
883 | } | |
884 | ||
885 | return 0; | |
886 | } | |
887 | ||
3fb319c2 NS |
888 | static int twl4030_bci_set_property(struct power_supply *psy, |
889 | enum power_supply_property psp, | |
890 | const union power_supply_propval *val) | |
891 | { | |
892 | struct twl4030_bci *bci = dev_get_drvdata(psy->dev.parent); | |
893 | ||
894 | switch (psp) { | |
895 | case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: | |
896 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) | |
897 | bci->usb_cur_target = val->intval; | |
898 | else | |
899 | bci->ac_cur = val->intval; | |
900 | twl4030_charger_update_current(bci); | |
901 | break; | |
902 | default: | |
903 | return -EINVAL; | |
904 | } | |
905 | ||
906 | return 0; | |
907 | } | |
908 | ||
50730eb3 | 909 | static int twl4030_bci_property_is_writeable(struct power_supply *psy, |
3fb319c2 NS |
910 | enum power_supply_property psp) |
911 | { | |
912 | switch (psp) { | |
913 | case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: | |
914 | return true; | |
915 | default: | |
916 | return false; | |
917 | } | |
918 | } | |
919 | ||
2e727f17 GI |
920 | static enum power_supply_property twl4030_charger_props[] = { |
921 | POWER_SUPPLY_PROP_STATUS, | |
922 | POWER_SUPPLY_PROP_ONLINE, | |
923 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
924 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
3fb319c2 | 925 | POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, |
2e727f17 GI |
926 | }; |
927 | ||
ec0b3802 N |
928 | #ifdef CONFIG_OF |
929 | static const struct twl4030_bci_platform_data * | |
930 | twl4030_bci_parse_dt(struct device *dev) | |
931 | { | |
932 | struct device_node *np = dev->of_node; | |
933 | struct twl4030_bci_platform_data *pdata; | |
934 | u32 num; | |
935 | ||
936 | if (!np) | |
937 | return NULL; | |
938 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
939 | if (!pdata) | |
940 | return pdata; | |
941 | ||
942 | if (of_property_read_u32(np, "ti,bb-uvolt", &num) == 0) | |
943 | pdata->bb_uvolt = num; | |
944 | if (of_property_read_u32(np, "ti,bb-uamp", &num) == 0) | |
945 | pdata->bb_uamp = num; | |
946 | return pdata; | |
947 | } | |
948 | #else | |
949 | static inline const struct twl4030_bci_platform_data * | |
950 | twl4030_bci_parse_dt(struct device *dev) | |
951 | { | |
952 | return NULL; | |
953 | } | |
954 | #endif | |
955 | ||
297d716f KK |
956 | static const struct power_supply_desc twl4030_bci_ac_desc = { |
957 | .name = "twl4030_ac", | |
958 | .type = POWER_SUPPLY_TYPE_MAINS, | |
959 | .properties = twl4030_charger_props, | |
960 | .num_properties = ARRAY_SIZE(twl4030_charger_props), | |
961 | .get_property = twl4030_bci_get_property, | |
3fb319c2 NS |
962 | .set_property = twl4030_bci_set_property, |
963 | .property_is_writeable = twl4030_bci_property_is_writeable, | |
297d716f KK |
964 | }; |
965 | ||
966 | static const struct power_supply_desc twl4030_bci_usb_desc = { | |
967 | .name = "twl4030_usb", | |
968 | .type = POWER_SUPPLY_TYPE_USB, | |
969 | .properties = twl4030_charger_props, | |
970 | .num_properties = ARRAY_SIZE(twl4030_charger_props), | |
971 | .get_property = twl4030_bci_get_property, | |
3fb319c2 NS |
972 | .set_property = twl4030_bci_set_property, |
973 | .property_is_writeable = twl4030_bci_property_is_writeable, | |
297d716f KK |
974 | }; |
975 | ||
7396f708 | 976 | static int twl4030_bci_probe(struct platform_device *pdev) |
2e727f17 GI |
977 | { |
978 | struct twl4030_bci *bci; | |
ec0b3802 | 979 | const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data; |
2e727f17 | 980 | int ret; |
28d48f04 | 981 | u32 reg; |
2e727f17 | 982 | |
325b50aa | 983 | bci = devm_kzalloc(&pdev->dev, sizeof(*bci), GFP_KERNEL); |
2e727f17 GI |
984 | if (bci == NULL) |
985 | return -ENOMEM; | |
986 | ||
ec0b3802 N |
987 | if (!pdata) |
988 | pdata = twl4030_bci_parse_dt(&pdev->dev); | |
989 | ||
1098cb58 N |
990 | bci->ichg_eoc = 80100; /* Stop charging when current drops to here */ |
991 | bci->ichg_lo = 241000; /* Low threshold */ | |
992 | bci->ichg_hi = 500000; /* High threshold */ | |
e4ae537e | 993 | bci->ac_cur = 500000; /* 500mA */ |
1098cb58 | 994 | if (allow_usb) |
21ae4040 | 995 | bci->usb_cur_target = 500000; /* 500mA */ |
1098cb58 | 996 | else |
21ae4040 | 997 | bci->usb_cur_target = 100000; /* 100mA */ |
22d4c33f | 998 | bci->usb_mode = CHARGE_AUTO; |
b04b908d | 999 | bci->ac_mode = CHARGE_AUTO; |
1098cb58 | 1000 | |
2e727f17 GI |
1001 | bci->dev = &pdev->dev; |
1002 | bci->irq_chg = platform_get_irq(pdev, 0); | |
1003 | bci->irq_bci = platform_get_irq(pdev, 1); | |
1004 | ||
61a7784e | 1005 | platform_set_drvdata(pdev, bci); |
2e727f17 | 1006 | |
3950c95e NS |
1007 | INIT_WORK(&bci->work, twl4030_bci_usb_work); |
1008 | INIT_DELAYED_WORK(&bci->current_worker, twl4030_current_worker); | |
1009 | ||
5e6eb025 NS |
1010 | bci->channel_vac = devm_iio_channel_get(&pdev->dev, "vac"); |
1011 | if (IS_ERR(bci->channel_vac)) { | |
7bb5a650 NS |
1012 | ret = PTR_ERR(bci->channel_vac); |
1013 | if (ret == -EPROBE_DEFER) | |
1014 | return ret; /* iio not ready */ | |
1015 | dev_warn(&pdev->dev, "could not request vac iio channel (%d)", | |
1016 | ret); | |
5e6eb025 | 1017 | bci->channel_vac = NULL; |
5e6eb025 NS |
1018 | } |
1019 | ||
3950c95e NS |
1020 | if (bci->dev->of_node) { |
1021 | struct device_node *phynode; | |
1022 | ||
9844fb2e JH |
1023 | phynode = of_get_compatible_child(bci->dev->of_node->parent, |
1024 | "ti,twl4030-usb"); | |
3950c95e NS |
1025 | if (phynode) { |
1026 | bci->usb_nb.notifier_call = twl4030_bci_usb_ncb; | |
1027 | bci->transceiver = devm_usb_get_phy_by_node( | |
1028 | bci->dev, phynode, &bci->usb_nb); | |
9844fb2e | 1029 | of_node_put(phynode); |
7bb5a650 NS |
1030 | if (IS_ERR(bci->transceiver)) { |
1031 | ret = PTR_ERR(bci->transceiver); | |
1032 | if (ret == -EPROBE_DEFER) | |
1033 | return ret; /* phy not ready */ | |
1034 | dev_warn(&pdev->dev, "could not request transceiver (%d)", | |
1035 | ret); | |
1036 | bci->transceiver = NULL; | |
1037 | } | |
3950c95e NS |
1038 | } |
1039 | } | |
1040 | ||
325b50aa N |
1041 | bci->ac = devm_power_supply_register(&pdev->dev, &twl4030_bci_ac_desc, |
1042 | NULL); | |
297d716f KK |
1043 | if (IS_ERR(bci->ac)) { |
1044 | ret = PTR_ERR(bci->ac); | |
2e727f17 | 1045 | dev_err(&pdev->dev, "failed to register ac: %d\n", ret); |
325b50aa | 1046 | return ret; |
2e727f17 GI |
1047 | } |
1048 | ||
325b50aa N |
1049 | bci->usb = devm_power_supply_register(&pdev->dev, &twl4030_bci_usb_desc, |
1050 | NULL); | |
297d716f KK |
1051 | if (IS_ERR(bci->usb)) { |
1052 | ret = PTR_ERR(bci->usb); | |
2e727f17 | 1053 | dev_err(&pdev->dev, "failed to register usb: %d\n", ret); |
325b50aa | 1054 | return ret; |
2e727f17 GI |
1055 | } |
1056 | ||
1b7cac23 | 1057 | ret = devm_request_threaded_irq(&pdev->dev, bci->irq_chg, NULL, |
a2778b0f FW |
1058 | twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name, |
1059 | bci); | |
2e727f17 GI |
1060 | if (ret < 0) { |
1061 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", | |
1062 | bci->irq_chg, ret); | |
325b50aa | 1063 | return ret; |
2e727f17 GI |
1064 | } |
1065 | ||
1b7cac23 | 1066 | ret = devm_request_threaded_irq(&pdev->dev, bci->irq_bci, NULL, |
a2778b0f | 1067 | twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci); |
2e727f17 GI |
1068 | if (ret < 0) { |
1069 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", | |
1070 | bci->irq_bci, ret); | |
325b50aa | 1071 | return ret; |
2e727f17 GI |
1072 | } |
1073 | ||
2e727f17 | 1074 | /* Enable interrupts now. */ |
28d48f04 | 1075 | reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 | |
2e727f17 GI |
1076 | TWL4030_TBATOR1 | TWL4030_BATSTS); |
1077 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, | |
1078 | TWL4030_INTERRUPTS_BCIIMR1A); | |
1079 | if (ret < 0) { | |
1080 | dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret); | |
e8847c56 | 1081 | return ret; |
2e727f17 GI |
1082 | } |
1083 | ||
28d48f04 | 1084 | reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV); |
2e727f17 GI |
1085 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, |
1086 | TWL4030_INTERRUPTS_BCIIMR2A); | |
1087 | if (ret < 0) | |
1088 | dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret); | |
1089 | ||
1098cb58 | 1090 | twl4030_charger_update_current(bci); |
22d4c33f N |
1091 | if (device_create_file(&bci->usb->dev, &dev_attr_mode)) |
1092 | dev_warn(&pdev->dev, "could not create sysfs file\n"); | |
b04b908d N |
1093 | if (device_create_file(&bci->ac->dev, &dev_attr_mode)) |
1094 | dev_warn(&pdev->dev, "could not create sysfs file\n"); | |
aca3c354 | 1095 | |
b04b908d | 1096 | twl4030_charger_enable_ac(bci, true); |
6e37ec8c N |
1097 | if (!IS_ERR_OR_NULL(bci->transceiver)) |
1098 | twl4030_bci_usb_ncb(&bci->usb_nb, | |
1099 | bci->transceiver->last_event, | |
1100 | NULL); | |
1101 | else | |
1102 | twl4030_charger_enable_usb(bci, false); | |
ec0b3802 N |
1103 | if (pdata) |
1104 | twl4030_charger_enable_backup(pdata->bb_uvolt, | |
1105 | pdata->bb_uamp); | |
1106 | else | |
1107 | twl4030_charger_enable_backup(0, 0); | |
2e727f17 GI |
1108 | |
1109 | return 0; | |
2e727f17 GI |
1110 | } |
1111 | ||
420b2d44 | 1112 | static int twl4030_bci_remove(struct platform_device *pdev) |
2e727f17 GI |
1113 | { |
1114 | struct twl4030_bci *bci = platform_get_drvdata(pdev); | |
1115 | ||
b04b908d | 1116 | twl4030_charger_enable_ac(bci, false); |
2e727f17 | 1117 | twl4030_charger_enable_usb(bci, false); |
210d4bc8 | 1118 | twl4030_charger_enable_backup(0, 0); |
2e727f17 | 1119 | |
22d4c33f | 1120 | device_remove_file(&bci->usb->dev, &dev_attr_mode); |
b04b908d | 1121 | device_remove_file(&bci->ac->dev, &dev_attr_mode); |
2e727f17 GI |
1122 | /* mask interrupts */ |
1123 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, | |
1124 | TWL4030_INTERRUPTS_BCIIMR1A); | |
1125 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, | |
1126 | TWL4030_INTERRUPTS_BCIIMR2A); | |
1127 | ||
2e727f17 GI |
1128 | return 0; |
1129 | } | |
1130 | ||
ec0b3802 N |
1131 | static const struct of_device_id twl_bci_of_match[] = { |
1132 | {.compatible = "ti,twl4030-bci", }, | |
1133 | { } | |
1134 | }; | |
1135 | MODULE_DEVICE_TABLE(of, twl_bci_of_match); | |
1136 | ||
2e727f17 | 1137 | static struct platform_driver twl4030_bci_driver = { |
7396f708 | 1138 | .probe = twl4030_bci_probe, |
420b2d44 | 1139 | .remove = twl4030_bci_remove, |
2e727f17 GI |
1140 | .driver = { |
1141 | .name = "twl4030_bci", | |
ec0b3802 | 1142 | .of_match_table = of_match_ptr(twl_bci_of_match), |
2e727f17 | 1143 | }, |
2e727f17 | 1144 | }; |
7396f708 | 1145 | module_platform_driver(twl4030_bci_driver); |
2e727f17 | 1146 | |
28d48f04 | 1147 | MODULE_AUTHOR("Gražvydas Ignotas"); |
2e727f17 GI |
1148 | MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver"); |
1149 | MODULE_LICENSE("GPL"); | |
1150 | MODULE_ALIAS("platform:twl4030_bci"); |