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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> | |
2202e1fc | 25 | #include <linux/iio/consumer.h> |
2e727f17 | 26 | |
7f4a633d N |
27 | #define TWL4030_BCIMDEN 0x00 |
28 | #define TWL4030_BCIMDKEY 0x01 | |
2e727f17 GI |
29 | #define TWL4030_BCIMSTATEC 0x02 |
30 | #define TWL4030_BCIICHG 0x08 | |
31 | #define TWL4030_BCIVAC 0x0a | |
32 | #define TWL4030_BCIVBUS 0x0c | |
61a7784e | 33 | #define TWL4030_BCIMFSTS3 0x0F |
2e727f17 GI |
34 | #define TWL4030_BCIMFSTS4 0x10 |
35 | #define TWL4030_BCICTL1 0x23 | |
210d4bc8 | 36 | #define TWL4030_BB_CFG 0x12 |
1098cb58 N |
37 | #define TWL4030_BCIIREF1 0x27 |
38 | #define TWL4030_BCIIREF2 0x28 | |
39 | #define TWL4030_BCIMFKEY 0x11 | |
7f4a633d | 40 | #define TWL4030_BCIMFEN3 0x14 |
1098cb58 N |
41 | #define TWL4030_BCIMFTH8 0x1d |
42 | #define TWL4030_BCIMFTH9 0x1e | |
7f4a633d | 43 | #define TWL4030_BCIWDKEY 0x21 |
2e727f17 | 44 | |
61a7784e NM |
45 | #define TWL4030_BCIMFSTS1 0x01 |
46 | ||
2e727f17 GI |
47 | #define TWL4030_BCIAUTOWEN BIT(5) |
48 | #define TWL4030_CONFIG_DONE BIT(4) | |
7f4a633d | 49 | #define TWL4030_CVENAC BIT(2) |
2e727f17 GI |
50 | #define TWL4030_BCIAUTOUSB BIT(1) |
51 | #define TWL4030_BCIAUTOAC BIT(0) | |
52 | #define TWL4030_CGAIN BIT(5) | |
53 | #define TWL4030_USBFASTMCHG BIT(2) | |
54 | #define TWL4030_STS_VBUS BIT(7) | |
55 | #define TWL4030_STS_USB_ID BIT(2) | |
210d4bc8 | 56 | #define TWL4030_BBCHEN BIT(4) |
94b05cab IH |
57 | #define TWL4030_BBSEL_MASK 0x0c |
58 | #define TWL4030_BBSEL_2V5 0x00 | |
59 | #define TWL4030_BBSEL_3V0 0x04 | |
60 | #define TWL4030_BBSEL_3V1 0x08 | |
61 | #define TWL4030_BBSEL_3V2 0x0c | |
62 | #define TWL4030_BBISEL_MASK 0x03 | |
63 | #define TWL4030_BBISEL_25uA 0x00 | |
64 | #define TWL4030_BBISEL_150uA 0x01 | |
65 | #define TWL4030_BBISEL_500uA 0x02 | |
66 | #define TWL4030_BBISEL_1000uA 0x03 | |
2e727f17 | 67 | |
61a7784e NM |
68 | #define TWL4030_BATSTSPCHG BIT(2) |
69 | #define TWL4030_BATSTSMCHG BIT(6) | |
70 | ||
2e727f17 GI |
71 | /* BCI interrupts */ |
72 | #define TWL4030_WOVF BIT(0) /* Watchdog overflow */ | |
73 | #define TWL4030_TMOVF BIT(1) /* Timer overflow */ | |
74 | #define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */ | |
75 | #define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */ | |
76 | #define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */ | |
77 | #define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */ | |
78 | #define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */ | |
79 | #define TWL4030_BATSTS BIT(7) /* Battery status */ | |
80 | ||
81 | #define TWL4030_VBATLVL BIT(0) /* VBAT level */ | |
82 | #define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */ | |
83 | #define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */ | |
84 | #define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */ | |
85 | ||
86 | #define TWL4030_MSTATEC_USB BIT(4) | |
87 | #define TWL4030_MSTATEC_AC BIT(5) | |
88 | #define TWL4030_MSTATEC_MASK 0x0f | |
89 | #define TWL4030_MSTATEC_QUICK1 0x02 | |
90 | #define TWL4030_MSTATEC_QUICK7 0x07 | |
91 | #define TWL4030_MSTATEC_COMPLETE1 0x0b | |
92 | #define TWL4030_MSTATEC_COMPLETE4 0x0e | |
93 | ||
b49d15d1 N |
94 | /* |
95 | * If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11) | |
96 | * then AC is available. | |
97 | */ | |
2202e1fc | 98 | static inline int ac_available(struct iio_channel *channel_vac) |
b49d15d1 | 99 | { |
2202e1fc MB |
100 | int val, err; |
101 | ||
102 | if (!channel_vac) | |
103 | return 0; | |
104 | ||
105 | err = iio_read_channel_processed(channel_vac, &val); | |
106 | if (err < 0) | |
107 | return 0; | |
108 | return val > 4500; | |
b49d15d1 | 109 | } |
2202e1fc | 110 | |
2e727f17 | 111 | static bool allow_usb; |
28d48f04 | 112 | module_param(allow_usb, bool, 0644); |
2e727f17 GI |
113 | MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current"); |
114 | ||
115 | struct twl4030_bci { | |
116 | struct device *dev; | |
297d716f KK |
117 | struct power_supply *ac; |
118 | struct power_supply *usb; | |
86753811 | 119 | struct usb_phy *transceiver; |
fcc8ebc9 | 120 | struct notifier_block usb_nb; |
d6ccc442 | 121 | struct work_struct work; |
2e727f17 GI |
122 | int irq_chg; |
123 | int irq_bci; | |
ab37813f | 124 | int usb_enabled; |
d6ccc442 | 125 | |
1098cb58 | 126 | /* |
e4ae537e N |
127 | * ichg_* and *_cur values in uA. If any are 'large', we set |
128 | * CGAIN to '1' which doubles the range for half the | |
129 | * precision. | |
1098cb58 | 130 | */ |
e4ae537e N |
131 | unsigned int ichg_eoc, ichg_lo, ichg_hi; |
132 | unsigned int usb_cur, ac_cur; | |
2202e1fc | 133 | struct iio_channel *channel_vac; |
e4ae537e | 134 | bool ac_is_active; |
b04b908d | 135 | int usb_mode, ac_mode; /* charging mode requested */ |
22d4c33f N |
136 | #define CHARGE_OFF 0 |
137 | #define CHARGE_AUTO 1 | |
7f4a633d | 138 | #define CHARGE_LINEAR 2 |
1098cb58 | 139 | |
21ae4040 N |
140 | /* When setting the USB current we slowly increase the |
141 | * requested current until target is reached or the voltage | |
142 | * drops below 4.75V. In the latter case we step back one | |
143 | * step. | |
144 | */ | |
145 | unsigned int usb_cur_target; | |
146 | struct delayed_work current_worker; | |
147 | #define USB_CUR_STEP 20000 /* 20mA at a time */ | |
148 | #define USB_MIN_VOLT 4750000 /* 4.75V */ | |
149 | #define USB_CUR_DELAY msecs_to_jiffies(100) | |
150 | #define USB_MAX_CURRENT 1700000 /* TWL4030 caps at 1.7A */ | |
151 | ||
d6ccc442 | 152 | unsigned long event; |
2e727f17 GI |
153 | }; |
154 | ||
22d4c33f | 155 | /* strings for 'usb_mode' values */ |
7f4a633d | 156 | static char *modes[] = { "off", "auto", "continuous" }; |
22d4c33f | 157 | |
2e727f17 GI |
158 | /* |
159 | * clear and set bits on an given register on a given module | |
160 | */ | |
161 | static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg) | |
162 | { | |
163 | u8 val = 0; | |
164 | int ret; | |
165 | ||
166 | ret = twl_i2c_read_u8(mod_no, &val, reg); | |
167 | if (ret) | |
168 | return ret; | |
169 | ||
170 | val &= ~clear; | |
171 | val |= set; | |
172 | ||
173 | return twl_i2c_write_u8(mod_no, val, reg); | |
174 | } | |
175 | ||
176 | static int twl4030_bci_read(u8 reg, u8 *val) | |
177 | { | |
e9f14c18 | 178 | return twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, val, reg); |
2e727f17 GI |
179 | } |
180 | ||
181 | static int twl4030_clear_set_boot_bci(u8 clear, u8 set) | |
182 | { | |
e9f14c18 | 183 | return twl4030_clear_set(TWL_MODULE_PM_MASTER, clear, |
2e727f17 GI |
184 | TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set, |
185 | TWL4030_PM_MASTER_BOOT_BCI); | |
186 | } | |
187 | ||
188 | static int twl4030bci_read_adc_val(u8 reg) | |
189 | { | |
190 | int ret, temp; | |
191 | u8 val; | |
192 | ||
193 | /* read MSB */ | |
194 | ret = twl4030_bci_read(reg + 1, &val); | |
195 | if (ret) | |
196 | return ret; | |
197 | ||
198 | temp = (int)(val & 0x03) << 8; | |
199 | ||
200 | /* read LSB */ | |
201 | ret = twl4030_bci_read(reg, &val); | |
202 | if (ret) | |
203 | return ret; | |
204 | ||
205 | return temp | val; | |
206 | } | |
207 | ||
61a7784e NM |
208 | /* |
209 | * Check if Battery Pack was present | |
210 | */ | |
211 | static int twl4030_is_battery_present(struct twl4030_bci *bci) | |
212 | { | |
213 | int ret; | |
214 | u8 val = 0; | |
215 | ||
216 | /* Battery presence in Main charge? */ | |
217 | ret = twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, &val, TWL4030_BCIMFSTS3); | |
218 | if (ret) | |
219 | return ret; | |
220 | if (val & TWL4030_BATSTSMCHG) | |
221 | return 0; | |
222 | ||
223 | /* | |
224 | * OK, It could be that bootloader did not enable main charger, | |
225 | * pre-charge is h/w auto. So, Battery presence in Pre-charge? | |
226 | */ | |
227 | ret = twl_i2c_read_u8(TWL4030_MODULE_PRECHARGE, &val, | |
228 | TWL4030_BCIMFSTS1); | |
229 | if (ret) | |
230 | return ret; | |
231 | if (val & TWL4030_BATSTSPCHG) | |
232 | return 0; | |
233 | ||
234 | return -ENODEV; | |
235 | } | |
236 | ||
3b542f08 N |
237 | /* |
238 | * TI provided formulas: | |
239 | * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85 | |
240 | * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7 | |
241 | * Here we use integer approximation of: | |
242 | * CGAIN == 0: val * 1.6618 - 0.85 * 1000 | |
243 | * CGAIN == 1: (val * 1.6618 - 0.85 * 1000) * 2 | |
244 | */ | |
245 | /* | |
246 | * convert twl register value for currents into uA | |
247 | */ | |
248 | static int regval2ua(int regval, bool cgain) | |
249 | { | |
250 | if (cgain) | |
251 | return (regval * 16618 - 8500 * 1000) / 5; | |
252 | else | |
253 | return (regval * 16618 - 8500 * 1000) / 10; | |
254 | } | |
255 | ||
256 | /* | |
257 | * convert uA currents into twl register value | |
258 | */ | |
259 | static int ua2regval(int ua, bool cgain) | |
260 | { | |
261 | int ret; | |
262 | if (cgain) | |
263 | ua /= 2; | |
264 | ret = (ua * 10 + 8500 * 1000) / 16618; | |
265 | /* rounding problems */ | |
266 | if (ret < 512) | |
267 | ret = 512; | |
268 | return ret; | |
269 | } | |
270 | ||
1098cb58 N |
271 | static int twl4030_charger_update_current(struct twl4030_bci *bci) |
272 | { | |
273 | int status; | |
e4ae537e | 274 | int cur; |
1098cb58 N |
275 | unsigned reg, cur_reg; |
276 | u8 bcictl1, oldreg, fullreg; | |
277 | bool cgain = false; | |
278 | u8 boot_bci; | |
279 | ||
e4ae537e N |
280 | /* |
281 | * If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11) | |
282 | * and AC is enabled, set current for 'ac' | |
283 | */ | |
2202e1fc | 284 | if (ac_available(bci->channel_vac)) { |
e4ae537e N |
285 | cur = bci->ac_cur; |
286 | bci->ac_is_active = true; | |
287 | } else { | |
288 | cur = bci->usb_cur; | |
289 | bci->ac_is_active = false; | |
21ae4040 N |
290 | if (cur > bci->usb_cur_target) { |
291 | cur = bci->usb_cur_target; | |
292 | bci->usb_cur = cur; | |
293 | } | |
294 | if (cur < bci->usb_cur_target) | |
295 | schedule_delayed_work(&bci->current_worker, USB_CUR_DELAY); | |
e4ae537e N |
296 | } |
297 | ||
1098cb58 N |
298 | /* First, check thresholds and see if cgain is needed */ |
299 | if (bci->ichg_eoc >= 200000) | |
300 | cgain = true; | |
301 | if (bci->ichg_lo >= 400000) | |
302 | cgain = true; | |
303 | if (bci->ichg_hi >= 820000) | |
304 | cgain = true; | |
e4ae537e | 305 | if (cur > 852000) |
1098cb58 N |
306 | cgain = true; |
307 | ||
308 | status = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); | |
309 | if (status < 0) | |
310 | return status; | |
311 | if (twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &boot_bci, | |
312 | TWL4030_PM_MASTER_BOOT_BCI) < 0) | |
313 | boot_bci = 0; | |
314 | boot_bci &= 7; | |
315 | ||
316 | if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN)) | |
317 | /* Need to turn for charging while we change the | |
318 | * CGAIN bit. Leave it off while everything is | |
319 | * updated. | |
320 | */ | |
321 | twl4030_clear_set_boot_bci(boot_bci, 0); | |
322 | ||
323 | /* | |
324 | * For ichg_eoc, the hardware only supports reg values matching | |
325 | * 100XXXX000, and requires the XXXX be stored in the high nibble | |
326 | * of TWL4030_BCIMFTH8. | |
327 | */ | |
328 | reg = ua2regval(bci->ichg_eoc, cgain); | |
329 | if (reg > 0x278) | |
330 | reg = 0x278; | |
331 | if (reg < 0x200) | |
332 | reg = 0x200; | |
333 | reg = (reg >> 3) & 0xf; | |
334 | fullreg = reg << 4; | |
335 | ||
336 | /* | |
337 | * For ichg_lo, reg value must match 10XXXX0000. | |
338 | * XXXX is stored in low nibble of TWL4030_BCIMFTH8. | |
339 | */ | |
340 | reg = ua2regval(bci->ichg_lo, cgain); | |
341 | if (reg > 0x2F0) | |
342 | reg = 0x2F0; | |
343 | if (reg < 0x200) | |
344 | reg = 0x200; | |
345 | reg = (reg >> 4) & 0xf; | |
346 | fullreg |= reg; | |
347 | ||
348 | /* ichg_eoc and ichg_lo live in same register */ | |
349 | status = twl4030_bci_read(TWL4030_BCIMFTH8, &oldreg); | |
350 | if (status < 0) | |
351 | return status; | |
352 | if (oldreg != fullreg) { | |
353 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xF4, | |
354 | TWL4030_BCIMFKEY); | |
355 | if (status < 0) | |
356 | return status; | |
357 | twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
358 | fullreg, TWL4030_BCIMFTH8); | |
359 | } | |
360 | ||
361 | /* ichg_hi threshold must be 1XXXX01100 (I think) */ | |
362 | reg = ua2regval(bci->ichg_hi, cgain); | |
363 | if (reg > 0x3E0) | |
364 | reg = 0x3E0; | |
365 | if (reg < 0x200) | |
366 | reg = 0x200; | |
367 | fullreg = (reg >> 5) & 0xF; | |
368 | fullreg <<= 4; | |
369 | status = twl4030_bci_read(TWL4030_BCIMFTH9, &oldreg); | |
370 | if (status < 0) | |
371 | return status; | |
372 | if ((oldreg & 0xF0) != fullreg) { | |
373 | fullreg |= (oldreg & 0x0F); | |
374 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, | |
375 | TWL4030_BCIMFKEY); | |
376 | if (status < 0) | |
377 | return status; | |
378 | twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
379 | fullreg, TWL4030_BCIMFTH9); | |
380 | } | |
381 | ||
382 | /* | |
383 | * And finally, set the current. This is stored in | |
384 | * two registers. | |
385 | */ | |
e4ae537e | 386 | reg = ua2regval(cur, cgain); |
1098cb58 N |
387 | /* we have only 10 bits */ |
388 | if (reg > 0x3ff) | |
389 | reg = 0x3ff; | |
390 | status = twl4030_bci_read(TWL4030_BCIIREF1, &oldreg); | |
391 | if (status < 0) | |
392 | return status; | |
393 | cur_reg = oldreg; | |
394 | status = twl4030_bci_read(TWL4030_BCIIREF2, &oldreg); | |
395 | if (status < 0) | |
396 | return status; | |
397 | cur_reg |= oldreg << 8; | |
398 | if (reg != oldreg) { | |
399 | /* disable write protection for one write access for | |
400 | * BCIIREF */ | |
401 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, | |
402 | TWL4030_BCIMFKEY); | |
403 | if (status < 0) | |
404 | return status; | |
405 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
406 | (reg & 0x100) ? 3 : 2, | |
407 | TWL4030_BCIIREF2); | |
408 | if (status < 0) | |
409 | return status; | |
410 | /* disable write protection for one write access for | |
411 | * BCIIREF */ | |
412 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, | |
413 | TWL4030_BCIMFKEY); | |
414 | if (status < 0) | |
415 | return status; | |
416 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
417 | reg & 0xff, | |
418 | TWL4030_BCIIREF1); | |
419 | } | |
420 | if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN)) { | |
421 | /* Flip CGAIN and re-enable charging */ | |
422 | bcictl1 ^= TWL4030_CGAIN; | |
423 | twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
424 | bcictl1, TWL4030_BCICTL1); | |
425 | twl4030_clear_set_boot_bci(0, boot_bci); | |
426 | } | |
427 | return 0; | |
428 | } | |
429 | ||
21ae4040 N |
430 | static int twl4030_charger_get_current(void); |
431 | ||
432 | static void twl4030_current_worker(struct work_struct *data) | |
433 | { | |
434 | int v, curr; | |
435 | int res; | |
436 | struct twl4030_bci *bci = container_of(data, struct twl4030_bci, | |
437 | current_worker.work); | |
438 | ||
439 | res = twl4030bci_read_adc_val(TWL4030_BCIVBUS); | |
440 | if (res < 0) | |
441 | v = 0; | |
442 | else | |
443 | /* BCIVBUS uses ADCIN8, 7/1023 V/step */ | |
444 | v = res * 6843; | |
445 | curr = twl4030_charger_get_current(); | |
446 | ||
447 | dev_dbg(bci->dev, "v=%d cur=%d limit=%d target=%d\n", v, curr, | |
448 | bci->usb_cur, bci->usb_cur_target); | |
449 | ||
450 | if (v < USB_MIN_VOLT) { | |
451 | /* Back up and stop adjusting. */ | |
452 | bci->usb_cur -= USB_CUR_STEP; | |
453 | bci->usb_cur_target = bci->usb_cur; | |
454 | } else if (bci->usb_cur >= bci->usb_cur_target || | |
455 | bci->usb_cur + USB_CUR_STEP > USB_MAX_CURRENT) { | |
456 | /* Reached target and voltage is OK - stop */ | |
457 | return; | |
458 | } else { | |
459 | bci->usb_cur += USB_CUR_STEP; | |
460 | schedule_delayed_work(&bci->current_worker, USB_CUR_DELAY); | |
461 | } | |
462 | twl4030_charger_update_current(bci); | |
463 | } | |
464 | ||
2e727f17 | 465 | /* |
9c645d2f | 466 | * Enable/Disable USB Charge functionality. |
2e727f17 GI |
467 | */ |
468 | static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) | |
469 | { | |
470 | int ret; | |
471 | ||
22d4c33f N |
472 | if (bci->usb_mode == CHARGE_OFF) |
473 | enable = false; | |
e57c4a67 | 474 | if (enable && !IS_ERR_OR_NULL(bci->transceiver)) { |
2e727f17 | 475 | |
e4ae537e N |
476 | twl4030_charger_update_current(bci); |
477 | ||
e57c4a67 | 478 | /* Need to keep phy powered */ |
ab37813f | 479 | if (!bci->usb_enabled) { |
e57c4a67 | 480 | pm_runtime_get_sync(bci->transceiver->dev); |
ab37813f N |
481 | bci->usb_enabled = 1; |
482 | } | |
483 | ||
7f4a633d N |
484 | if (bci->usb_mode == CHARGE_AUTO) |
485 | /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */ | |
486 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB); | |
2e727f17 GI |
487 | |
488 | /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */ | |
e9f14c18 | 489 | ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0, |
2e727f17 | 490 | TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4); |
7f4a633d N |
491 | if (bci->usb_mode == CHARGE_LINEAR) { |
492 | twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC|TWL4030_CVENAC, 0); | |
493 | /* Watch dog key: WOVF acknowledge */ | |
494 | ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x33, | |
495 | TWL4030_BCIWDKEY); | |
496 | /* 0x24 + EKEY6: off mode */ | |
497 | ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x2a, | |
498 | TWL4030_BCIMDKEY); | |
499 | /* EKEY2: Linear charge: USB path */ | |
500 | ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x26, | |
501 | TWL4030_BCIMDKEY); | |
502 | /* WDKEY5: stop watchdog count */ | |
503 | ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xf3, | |
504 | TWL4030_BCIWDKEY); | |
505 | /* enable MFEN3 access */ | |
506 | ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x9c, | |
507 | TWL4030_BCIMFKEY); | |
508 | /* ICHGEOCEN - end-of-charge monitor (current < 80mA) | |
509 | * (charging continues) | |
510 | * ICHGLOWEN - current level monitor (charge continues) | |
511 | * don't monitor over-current or heat save | |
512 | */ | |
513 | ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xf0, | |
514 | TWL4030_BCIMFEN3); | |
515 | } | |
2e727f17 GI |
516 | } else { |
517 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0); | |
7f4a633d N |
518 | ret |= twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x2a, |
519 | TWL4030_BCIMDKEY); | |
ab37813f | 520 | if (bci->usb_enabled) { |
e57c4a67 N |
521 | pm_runtime_mark_last_busy(bci->transceiver->dev); |
522 | pm_runtime_put_autosuspend(bci->transceiver->dev); | |
ab37813f N |
523 | bci->usb_enabled = 0; |
524 | } | |
21ae4040 | 525 | bci->usb_cur = 0; |
2e727f17 GI |
526 | } |
527 | ||
528 | return ret; | |
529 | } | |
530 | ||
531 | /* | |
532 | * Enable/Disable AC Charge funtionality. | |
533 | */ | |
b04b908d | 534 | static int twl4030_charger_enable_ac(struct twl4030_bci *bci, bool enable) |
2e727f17 GI |
535 | { |
536 | int ret; | |
537 | ||
b04b908d N |
538 | if (bci->ac_mode == CHARGE_OFF) |
539 | enable = false; | |
540 | ||
2e727f17 GI |
541 | if (enable) |
542 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC); | |
543 | else | |
544 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0); | |
545 | ||
546 | return ret; | |
547 | } | |
548 | ||
210d4bc8 N |
549 | /* |
550 | * Enable/Disable charging of Backup Battery. | |
551 | */ | |
552 | static int twl4030_charger_enable_backup(int uvolt, int uamp) | |
553 | { | |
554 | int ret; | |
555 | u8 flags; | |
556 | ||
557 | if (uvolt < 2500000 || | |
558 | uamp < 25) { | |
559 | /* disable charging of backup battery */ | |
e9f14c18 | 560 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
210d4bc8 N |
561 | TWL4030_BBCHEN, 0, TWL4030_BB_CFG); |
562 | return ret; | |
563 | } | |
564 | ||
565 | flags = TWL4030_BBCHEN; | |
566 | if (uvolt >= 3200000) | |
567 | flags |= TWL4030_BBSEL_3V2; | |
568 | else if (uvolt >= 3100000) | |
569 | flags |= TWL4030_BBSEL_3V1; | |
570 | else if (uvolt >= 3000000) | |
571 | flags |= TWL4030_BBSEL_3V0; | |
572 | else | |
573 | flags |= TWL4030_BBSEL_2V5; | |
574 | ||
575 | if (uamp >= 1000) | |
576 | flags |= TWL4030_BBISEL_1000uA; | |
577 | else if (uamp >= 500) | |
578 | flags |= TWL4030_BBISEL_500uA; | |
579 | else if (uamp >= 150) | |
580 | flags |= TWL4030_BBISEL_150uA; | |
581 | else | |
582 | flags |= TWL4030_BBISEL_25uA; | |
583 | ||
e9f14c18 | 584 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
210d4bc8 N |
585 | TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK, |
586 | flags, | |
587 | TWL4030_BB_CFG); | |
588 | ||
589 | return ret; | |
590 | } | |
591 | ||
2e727f17 GI |
592 | /* |
593 | * TWL4030 CHG_PRES (AC charger presence) events | |
594 | */ | |
595 | static irqreturn_t twl4030_charger_interrupt(int irq, void *arg) | |
596 | { | |
597 | struct twl4030_bci *bci = arg; | |
598 | ||
599 | dev_dbg(bci->dev, "CHG_PRES irq\n"); | |
aca3c354 N |
600 | /* reset current on each 'plug' event */ |
601 | bci->ac_cur = 500000; | |
e4ae537e | 602 | twl4030_charger_update_current(bci); |
297d716f KK |
603 | power_supply_changed(bci->ac); |
604 | power_supply_changed(bci->usb); | |
2e727f17 GI |
605 | |
606 | return IRQ_HANDLED; | |
607 | } | |
608 | ||
609 | /* | |
610 | * TWL4030 BCI monitoring events | |
611 | */ | |
612 | static irqreturn_t twl4030_bci_interrupt(int irq, void *arg) | |
613 | { | |
614 | struct twl4030_bci *bci = arg; | |
615 | u8 irqs1, irqs2; | |
616 | int ret; | |
617 | ||
618 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1, | |
619 | TWL4030_INTERRUPTS_BCIISR1A); | |
620 | if (ret < 0) | |
621 | return IRQ_HANDLED; | |
622 | ||
623 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2, | |
624 | TWL4030_INTERRUPTS_BCIISR2A); | |
625 | if (ret < 0) | |
626 | return IRQ_HANDLED; | |
627 | ||
628 | dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1); | |
629 | ||
630 | if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) { | |
631 | /* charger state change, inform the core */ | |
297d716f KK |
632 | power_supply_changed(bci->ac); |
633 | power_supply_changed(bci->usb); | |
2e727f17 | 634 | } |
e4ae537e | 635 | twl4030_charger_update_current(bci); |
2e727f17 GI |
636 | |
637 | /* various monitoring events, for now we just log them here */ | |
638 | if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1)) | |
639 | dev_warn(bci->dev, "battery temperature out of range\n"); | |
640 | ||
641 | if (irqs1 & TWL4030_BATSTS) | |
642 | dev_crit(bci->dev, "battery disconnected\n"); | |
643 | ||
644 | if (irqs2 & TWL4030_VBATOV) | |
645 | dev_crit(bci->dev, "VBAT overvoltage\n"); | |
646 | ||
647 | if (irqs2 & TWL4030_VBUSOV) | |
648 | dev_crit(bci->dev, "VBUS overvoltage\n"); | |
649 | ||
650 | if (irqs2 & TWL4030_ACCHGOV) | |
651 | dev_crit(bci->dev, "Ac charger overvoltage\n"); | |
652 | ||
653 | return IRQ_HANDLED; | |
654 | } | |
655 | ||
aca3c354 N |
656 | /* |
657 | * Provide "max_current" attribute in sysfs. | |
658 | */ | |
659 | static ssize_t | |
660 | twl4030_bci_max_current_store(struct device *dev, struct device_attribute *attr, | |
661 | const char *buf, size_t n) | |
662 | { | |
663 | struct twl4030_bci *bci = dev_get_drvdata(dev->parent); | |
664 | int cur = 0; | |
665 | int status = 0; | |
666 | status = kstrtoint(buf, 10, &cur); | |
667 | if (status) | |
668 | return status; | |
669 | if (cur < 0) | |
670 | return -EINVAL; | |
671 | if (dev == &bci->ac->dev) | |
672 | bci->ac_cur = cur; | |
673 | else | |
21ae4040 | 674 | bci->usb_cur_target = cur; |
aca3c354 N |
675 | |
676 | twl4030_charger_update_current(bci); | |
677 | return n; | |
678 | } | |
679 | ||
680 | /* | |
681 | * sysfs max_current show | |
682 | */ | |
683 | static ssize_t twl4030_bci_max_current_show(struct device *dev, | |
684 | struct device_attribute *attr, char *buf) | |
685 | { | |
686 | int status = 0; | |
687 | int cur = -1; | |
688 | u8 bcictl1; | |
689 | struct twl4030_bci *bci = dev_get_drvdata(dev->parent); | |
690 | ||
691 | if (dev == &bci->ac->dev) { | |
692 | if (!bci->ac_is_active) | |
693 | cur = bci->ac_cur; | |
694 | } else { | |
695 | if (bci->ac_is_active) | |
21ae4040 | 696 | cur = bci->usb_cur_target; |
aca3c354 N |
697 | } |
698 | if (cur < 0) { | |
699 | cur = twl4030bci_read_adc_val(TWL4030_BCIIREF1); | |
700 | if (cur < 0) | |
701 | return cur; | |
702 | status = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); | |
703 | if (status < 0) | |
704 | return status; | |
705 | cur = regval2ua(cur, bcictl1 & TWL4030_CGAIN); | |
706 | } | |
707 | return scnprintf(buf, PAGE_SIZE, "%u\n", cur); | |
708 | } | |
709 | ||
710 | static DEVICE_ATTR(max_current, 0644, twl4030_bci_max_current_show, | |
711 | twl4030_bci_max_current_store); | |
712 | ||
d6ccc442 | 713 | static void twl4030_bci_usb_work(struct work_struct *data) |
2e727f17 | 714 | { |
d6ccc442 | 715 | struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work); |
2e727f17 | 716 | |
d6ccc442 | 717 | switch (bci->event) { |
2e727f17 GI |
718 | case USB_EVENT_VBUS: |
719 | case USB_EVENT_CHARGER: | |
720 | twl4030_charger_enable_usb(bci, true); | |
721 | break; | |
722 | case USB_EVENT_NONE: | |
723 | twl4030_charger_enable_usb(bci, false); | |
724 | break; | |
725 | } | |
d6ccc442 HK |
726 | } |
727 | ||
728 | static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val, | |
729 | void *priv) | |
730 | { | |
fcc8ebc9 | 731 | struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, usb_nb); |
d6ccc442 HK |
732 | |
733 | dev_dbg(bci->dev, "OTG notify %lu\n", val); | |
734 | ||
aca3c354 N |
735 | /* reset current on each 'plug' event */ |
736 | if (allow_usb) | |
21ae4040 | 737 | bci->usb_cur_target = 500000; |
aca3c354 | 738 | else |
21ae4040 | 739 | bci->usb_cur_target = 100000; |
aca3c354 | 740 | |
d6ccc442 HK |
741 | bci->event = val; |
742 | schedule_work(&bci->work); | |
2e727f17 GI |
743 | |
744 | return NOTIFY_OK; | |
745 | } | |
746 | ||
22d4c33f N |
747 | /* |
748 | * sysfs charger enabled store | |
749 | */ | |
750 | static ssize_t | |
751 | twl4030_bci_mode_store(struct device *dev, struct device_attribute *attr, | |
752 | const char *buf, size_t n) | |
753 | { | |
754 | struct twl4030_bci *bci = dev_get_drvdata(dev->parent); | |
755 | int mode; | |
756 | int status; | |
757 | ||
758 | if (sysfs_streq(buf, modes[0])) | |
759 | mode = 0; | |
760 | else if (sysfs_streq(buf, modes[1])) | |
761 | mode = 1; | |
7f4a633d N |
762 | else if (sysfs_streq(buf, modes[2])) |
763 | mode = 2; | |
22d4c33f N |
764 | else |
765 | return -EINVAL; | |
b04b908d N |
766 | if (dev == &bci->ac->dev) { |
767 | if (mode == 2) | |
768 | return -EINVAL; | |
769 | twl4030_charger_enable_ac(bci, false); | |
770 | bci->ac_mode = mode; | |
771 | status = twl4030_charger_enable_ac(bci, true); | |
772 | } else { | |
773 | twl4030_charger_enable_usb(bci, false); | |
774 | bci->usb_mode = mode; | |
775 | status = twl4030_charger_enable_usb(bci, true); | |
776 | } | |
22d4c33f N |
777 | return (status == 0) ? n : status; |
778 | } | |
779 | ||
780 | /* | |
781 | * sysfs charger enabled show | |
782 | */ | |
783 | static ssize_t | |
784 | twl4030_bci_mode_show(struct device *dev, | |
785 | struct device_attribute *attr, char *buf) | |
786 | { | |
787 | struct twl4030_bci *bci = dev_get_drvdata(dev->parent); | |
788 | int len = 0; | |
789 | int i; | |
b04b908d N |
790 | int mode = bci->usb_mode; |
791 | ||
792 | if (dev == &bci->ac->dev) | |
793 | mode = bci->ac_mode; | |
22d4c33f N |
794 | |
795 | for (i = 0; i < ARRAY_SIZE(modes); i++) | |
b04b908d | 796 | if (mode == i) |
22d4c33f N |
797 | len += snprintf(buf+len, PAGE_SIZE-len, |
798 | "[%s] ", modes[i]); | |
799 | else | |
800 | len += snprintf(buf+len, PAGE_SIZE-len, | |
801 | "%s ", modes[i]); | |
802 | buf[len-1] = '\n'; | |
803 | return len; | |
804 | } | |
805 | static DEVICE_ATTR(mode, 0644, twl4030_bci_mode_show, | |
806 | twl4030_bci_mode_store); | |
807 | ||
2e727f17 GI |
808 | static int twl4030_charger_get_current(void) |
809 | { | |
810 | int curr; | |
811 | int ret; | |
812 | u8 bcictl1; | |
813 | ||
814 | curr = twl4030bci_read_adc_val(TWL4030_BCIICHG); | |
815 | if (curr < 0) | |
816 | return curr; | |
817 | ||
818 | ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); | |
819 | if (ret) | |
820 | return ret; | |
821 | ||
3b542f08 | 822 | return regval2ua(curr, bcictl1 & TWL4030_CGAIN); |
2e727f17 GI |
823 | } |
824 | ||
825 | /* | |
826 | * Returns the main charge FSM state | |
827 | * Or < 0 on failure. | |
828 | */ | |
829 | static int twl4030bci_state(struct twl4030_bci *bci) | |
830 | { | |
831 | int ret; | |
832 | u8 state; | |
833 | ||
834 | ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state); | |
835 | if (ret) { | |
836 | pr_err("twl4030_bci: error reading BCIMSTATEC\n"); | |
837 | return ret; | |
838 | } | |
839 | ||
840 | dev_dbg(bci->dev, "state: %02x\n", state); | |
841 | ||
842 | return state; | |
843 | } | |
844 | ||
845 | static int twl4030_bci_state_to_status(int state) | |
846 | { | |
847 | state &= TWL4030_MSTATEC_MASK; | |
848 | if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7) | |
849 | return POWER_SUPPLY_STATUS_CHARGING; | |
850 | else if (TWL4030_MSTATEC_COMPLETE1 <= state && | |
851 | state <= TWL4030_MSTATEC_COMPLETE4) | |
852 | return POWER_SUPPLY_STATUS_FULL; | |
853 | else | |
854 | return POWER_SUPPLY_STATUS_NOT_CHARGING; | |
855 | } | |
856 | ||
857 | static int twl4030_bci_get_property(struct power_supply *psy, | |
858 | enum power_supply_property psp, | |
859 | union power_supply_propval *val) | |
860 | { | |
297d716f | 861 | struct twl4030_bci *bci = dev_get_drvdata(psy->dev.parent); |
2e727f17 GI |
862 | int is_charging; |
863 | int state; | |
864 | int ret; | |
865 | ||
866 | state = twl4030bci_state(bci); | |
867 | if (state < 0) | |
868 | return state; | |
869 | ||
297d716f | 870 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) |
2e727f17 GI |
871 | is_charging = state & TWL4030_MSTATEC_USB; |
872 | else | |
873 | is_charging = state & TWL4030_MSTATEC_AC; | |
7f4a633d N |
874 | if (!is_charging) { |
875 | u8 s; | |
876 | twl4030_bci_read(TWL4030_BCIMDEN, &s); | |
877 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) | |
878 | is_charging = s & 1; | |
879 | else | |
880 | is_charging = s & 2; | |
881 | if (is_charging) | |
882 | /* A little white lie */ | |
883 | state = TWL4030_MSTATEC_QUICK1; | |
884 | } | |
2e727f17 GI |
885 | |
886 | switch (psp) { | |
887 | case POWER_SUPPLY_PROP_STATUS: | |
888 | if (is_charging) | |
889 | val->intval = twl4030_bci_state_to_status(state); | |
890 | else | |
891 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
892 | break; | |
893 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
894 | /* charging must be active for meaningful result */ | |
895 | if (!is_charging) | |
896 | return -ENODATA; | |
297d716f | 897 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) { |
2e727f17 GI |
898 | ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS); |
899 | if (ret < 0) | |
900 | return ret; | |
901 | /* BCIVBUS uses ADCIN8, 7/1023 V/step */ | |
902 | val->intval = ret * 6843; | |
903 | } else { | |
904 | ret = twl4030bci_read_adc_val(TWL4030_BCIVAC); | |
905 | if (ret < 0) | |
906 | return ret; | |
907 | /* BCIVAC uses ADCIN11, 10/1023 V/step */ | |
908 | val->intval = ret * 9775; | |
909 | } | |
910 | break; | |
911 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
912 | if (!is_charging) | |
913 | return -ENODATA; | |
914 | /* current measurement is shared between AC and USB */ | |
915 | ret = twl4030_charger_get_current(); | |
916 | if (ret < 0) | |
917 | return ret; | |
918 | val->intval = ret; | |
919 | break; | |
920 | case POWER_SUPPLY_PROP_ONLINE: | |
921 | val->intval = is_charging && | |
922 | twl4030_bci_state_to_status(state) != | |
923 | POWER_SUPPLY_STATUS_NOT_CHARGING; | |
924 | break; | |
925 | default: | |
926 | return -EINVAL; | |
927 | } | |
928 | ||
929 | return 0; | |
930 | } | |
931 | ||
932 | static enum power_supply_property twl4030_charger_props[] = { | |
933 | POWER_SUPPLY_PROP_STATUS, | |
934 | POWER_SUPPLY_PROP_ONLINE, | |
935 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
936 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
937 | }; | |
938 | ||
ec0b3802 N |
939 | #ifdef CONFIG_OF |
940 | static const struct twl4030_bci_platform_data * | |
941 | twl4030_bci_parse_dt(struct device *dev) | |
942 | { | |
943 | struct device_node *np = dev->of_node; | |
944 | struct twl4030_bci_platform_data *pdata; | |
945 | u32 num; | |
946 | ||
947 | if (!np) | |
948 | return NULL; | |
949 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
950 | if (!pdata) | |
951 | return pdata; | |
952 | ||
953 | if (of_property_read_u32(np, "ti,bb-uvolt", &num) == 0) | |
954 | pdata->bb_uvolt = num; | |
955 | if (of_property_read_u32(np, "ti,bb-uamp", &num) == 0) | |
956 | pdata->bb_uamp = num; | |
957 | return pdata; | |
958 | } | |
959 | #else | |
960 | static inline const struct twl4030_bci_platform_data * | |
961 | twl4030_bci_parse_dt(struct device *dev) | |
962 | { | |
963 | return NULL; | |
964 | } | |
965 | #endif | |
966 | ||
297d716f KK |
967 | static const struct power_supply_desc twl4030_bci_ac_desc = { |
968 | .name = "twl4030_ac", | |
969 | .type = POWER_SUPPLY_TYPE_MAINS, | |
970 | .properties = twl4030_charger_props, | |
971 | .num_properties = ARRAY_SIZE(twl4030_charger_props), | |
972 | .get_property = twl4030_bci_get_property, | |
973 | }; | |
974 | ||
975 | static const struct power_supply_desc twl4030_bci_usb_desc = { | |
976 | .name = "twl4030_usb", | |
977 | .type = POWER_SUPPLY_TYPE_USB, | |
978 | .properties = twl4030_charger_props, | |
979 | .num_properties = ARRAY_SIZE(twl4030_charger_props), | |
980 | .get_property = twl4030_bci_get_property, | |
981 | }; | |
982 | ||
7396f708 | 983 | static int twl4030_bci_probe(struct platform_device *pdev) |
2e727f17 GI |
984 | { |
985 | struct twl4030_bci *bci; | |
ec0b3802 | 986 | const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data; |
2e727f17 | 987 | int ret; |
28d48f04 | 988 | u32 reg; |
2e727f17 | 989 | |
325b50aa | 990 | bci = devm_kzalloc(&pdev->dev, sizeof(*bci), GFP_KERNEL); |
2e727f17 GI |
991 | if (bci == NULL) |
992 | return -ENOMEM; | |
993 | ||
ec0b3802 N |
994 | if (!pdata) |
995 | pdata = twl4030_bci_parse_dt(&pdev->dev); | |
996 | ||
1098cb58 N |
997 | bci->ichg_eoc = 80100; /* Stop charging when current drops to here */ |
998 | bci->ichg_lo = 241000; /* Low threshold */ | |
999 | bci->ichg_hi = 500000; /* High threshold */ | |
e4ae537e | 1000 | bci->ac_cur = 500000; /* 500mA */ |
1098cb58 | 1001 | if (allow_usb) |
21ae4040 | 1002 | bci->usb_cur_target = 500000; /* 500mA */ |
1098cb58 | 1003 | else |
21ae4040 | 1004 | bci->usb_cur_target = 100000; /* 100mA */ |
22d4c33f | 1005 | bci->usb_mode = CHARGE_AUTO; |
b04b908d | 1006 | bci->ac_mode = CHARGE_AUTO; |
1098cb58 | 1007 | |
2e727f17 GI |
1008 | bci->dev = &pdev->dev; |
1009 | bci->irq_chg = platform_get_irq(pdev, 0); | |
1010 | bci->irq_bci = platform_get_irq(pdev, 1); | |
1011 | ||
61a7784e NM |
1012 | /* Only proceed further *IF* battery is physically present */ |
1013 | ret = twl4030_is_battery_present(bci); | |
1014 | if (ret) { | |
1015 | dev_crit(&pdev->dev, "Battery was not detected:%d\n", ret); | |
325b50aa | 1016 | return ret; |
61a7784e | 1017 | } |
2e727f17 | 1018 | |
61a7784e | 1019 | platform_set_drvdata(pdev, bci); |
2e727f17 | 1020 | |
325b50aa N |
1021 | bci->ac = devm_power_supply_register(&pdev->dev, &twl4030_bci_ac_desc, |
1022 | NULL); | |
297d716f KK |
1023 | if (IS_ERR(bci->ac)) { |
1024 | ret = PTR_ERR(bci->ac); | |
2e727f17 | 1025 | dev_err(&pdev->dev, "failed to register ac: %d\n", ret); |
325b50aa | 1026 | return ret; |
2e727f17 GI |
1027 | } |
1028 | ||
325b50aa N |
1029 | bci->usb = devm_power_supply_register(&pdev->dev, &twl4030_bci_usb_desc, |
1030 | NULL); | |
297d716f KK |
1031 | if (IS_ERR(bci->usb)) { |
1032 | ret = PTR_ERR(bci->usb); | |
2e727f17 | 1033 | dev_err(&pdev->dev, "failed to register usb: %d\n", ret); |
325b50aa | 1034 | return ret; |
2e727f17 GI |
1035 | } |
1036 | ||
1b7cac23 | 1037 | ret = devm_request_threaded_irq(&pdev->dev, bci->irq_chg, NULL, |
a2778b0f FW |
1038 | twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name, |
1039 | bci); | |
2e727f17 GI |
1040 | if (ret < 0) { |
1041 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", | |
1042 | bci->irq_chg, ret); | |
325b50aa | 1043 | return ret; |
2e727f17 GI |
1044 | } |
1045 | ||
1b7cac23 | 1046 | ret = devm_request_threaded_irq(&pdev->dev, bci->irq_bci, NULL, |
a2778b0f | 1047 | twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci); |
2e727f17 GI |
1048 | if (ret < 0) { |
1049 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", | |
1050 | bci->irq_bci, ret); | |
325b50aa | 1051 | return ret; |
2e727f17 GI |
1052 | } |
1053 | ||
2202e1fc MB |
1054 | bci->channel_vac = iio_channel_get(&pdev->dev, "vac"); |
1055 | if (IS_ERR(bci->channel_vac)) { | |
1056 | bci->channel_vac = NULL; | |
1057 | dev_warn(&pdev->dev, "could not request vac iio channel"); | |
1058 | } | |
1059 | ||
d6ccc442 | 1060 | INIT_WORK(&bci->work, twl4030_bci_usb_work); |
21ae4040 | 1061 | INIT_DELAYED_WORK(&bci->current_worker, twl4030_current_worker); |
d6ccc442 | 1062 | |
f5e4edb8 N |
1063 | bci->usb_nb.notifier_call = twl4030_bci_usb_ncb; |
1064 | if (bci->dev->of_node) { | |
1065 | struct device_node *phynode; | |
1066 | ||
1067 | phynode = of_find_compatible_node(bci->dev->of_node->parent, | |
1068 | NULL, "ti,twl4030-usb"); | |
aefc574b | 1069 | if (phynode) |
f5e4edb8 N |
1070 | bci->transceiver = devm_usb_get_phy_by_node( |
1071 | bci->dev, phynode, &bci->usb_nb); | |
2e727f17 GI |
1072 | } |
1073 | ||
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); | |
2202e1fc | 1081 | goto fail; |
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); |
aca3c354 N |
1091 | if (device_create_file(&bci->usb->dev, &dev_attr_max_current)) |
1092 | dev_warn(&pdev->dev, "could not create sysfs file\n"); | |
22d4c33f N |
1093 | if (device_create_file(&bci->usb->dev, &dev_attr_mode)) |
1094 | dev_warn(&pdev->dev, "could not create sysfs file\n"); | |
b04b908d N |
1095 | if (device_create_file(&bci->ac->dev, &dev_attr_mode)) |
1096 | dev_warn(&pdev->dev, "could not create sysfs file\n"); | |
aca3c354 N |
1097 | if (device_create_file(&bci->ac->dev, &dev_attr_max_current)) |
1098 | dev_warn(&pdev->dev, "could not create sysfs file\n"); | |
1099 | ||
b04b908d | 1100 | twl4030_charger_enable_ac(bci, true); |
6e37ec8c N |
1101 | if (!IS_ERR_OR_NULL(bci->transceiver)) |
1102 | twl4030_bci_usb_ncb(&bci->usb_nb, | |
1103 | bci->transceiver->last_event, | |
1104 | NULL); | |
1105 | else | |
1106 | twl4030_charger_enable_usb(bci, false); | |
ec0b3802 N |
1107 | if (pdata) |
1108 | twl4030_charger_enable_backup(pdata->bb_uvolt, | |
1109 | pdata->bb_uamp); | |
1110 | else | |
1111 | twl4030_charger_enable_backup(0, 0); | |
2e727f17 GI |
1112 | |
1113 | return 0; | |
2202e1fc MB |
1114 | fail: |
1115 | iio_channel_release(bci->channel_vac); | |
1116 | ||
1117 | return ret; | |
2e727f17 GI |
1118 | } |
1119 | ||
1120 | static int __exit twl4030_bci_remove(struct platform_device *pdev) | |
1121 | { | |
1122 | struct twl4030_bci *bci = platform_get_drvdata(pdev); | |
1123 | ||
b04b908d | 1124 | twl4030_charger_enable_ac(bci, false); |
2e727f17 | 1125 | twl4030_charger_enable_usb(bci, false); |
210d4bc8 | 1126 | twl4030_charger_enable_backup(0, 0); |
2e727f17 | 1127 | |
2202e1fc MB |
1128 | iio_channel_release(bci->channel_vac); |
1129 | ||
aca3c354 | 1130 | device_remove_file(&bci->usb->dev, &dev_attr_max_current); |
22d4c33f | 1131 | device_remove_file(&bci->usb->dev, &dev_attr_mode); |
aca3c354 | 1132 | device_remove_file(&bci->ac->dev, &dev_attr_max_current); |
b04b908d | 1133 | device_remove_file(&bci->ac->dev, &dev_attr_mode); |
2e727f17 GI |
1134 | /* mask interrupts */ |
1135 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, | |
1136 | TWL4030_INTERRUPTS_BCIIMR1A); | |
1137 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, | |
1138 | TWL4030_INTERRUPTS_BCIIMR2A); | |
1139 | ||
2e727f17 GI |
1140 | return 0; |
1141 | } | |
1142 | ||
ec0b3802 N |
1143 | static const struct of_device_id twl_bci_of_match[] = { |
1144 | {.compatible = "ti,twl4030-bci", }, | |
1145 | { } | |
1146 | }; | |
1147 | MODULE_DEVICE_TABLE(of, twl_bci_of_match); | |
1148 | ||
2e727f17 | 1149 | static struct platform_driver twl4030_bci_driver = { |
7396f708 | 1150 | .probe = twl4030_bci_probe, |
2e727f17 GI |
1151 | .driver = { |
1152 | .name = "twl4030_bci", | |
ec0b3802 | 1153 | .of_match_table = of_match_ptr(twl_bci_of_match), |
2e727f17 GI |
1154 | }, |
1155 | .remove = __exit_p(twl4030_bci_remove), | |
1156 | }; | |
7396f708 | 1157 | module_platform_driver(twl4030_bci_driver); |
2e727f17 | 1158 | |
28d48f04 | 1159 | MODULE_AUTHOR("Gražvydas Ignotas"); |
2e727f17 GI |
1160 | MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver"); |
1161 | MODULE_LICENSE("GPL"); | |
1162 | MODULE_ALIAS("platform:twl4030_bci"); |