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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> | |
e4ae537e | 25 | #include <linux/i2c/twl4030-madc.h> |
2e727f17 GI |
26 | |
27 | #define TWL4030_BCIMSTATEC 0x02 | |
28 | #define TWL4030_BCIICHG 0x08 | |
29 | #define TWL4030_BCIVAC 0x0a | |
30 | #define TWL4030_BCIVBUS 0x0c | |
61a7784e | 31 | #define TWL4030_BCIMFSTS3 0x0F |
2e727f17 GI |
32 | #define TWL4030_BCIMFSTS4 0x10 |
33 | #define TWL4030_BCICTL1 0x23 | |
210d4bc8 | 34 | #define TWL4030_BB_CFG 0x12 |
1098cb58 N |
35 | #define TWL4030_BCIIREF1 0x27 |
36 | #define TWL4030_BCIIREF2 0x28 | |
37 | #define TWL4030_BCIMFKEY 0x11 | |
38 | #define TWL4030_BCIMFTH8 0x1d | |
39 | #define TWL4030_BCIMFTH9 0x1e | |
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) | |
45 | #define TWL4030_BCIAUTOUSB BIT(1) | |
46 | #define TWL4030_BCIAUTOAC BIT(0) | |
47 | #define TWL4030_CGAIN BIT(5) | |
48 | #define TWL4030_USBFASTMCHG BIT(2) | |
49 | #define TWL4030_STS_VBUS BIT(7) | |
50 | #define TWL4030_STS_USB_ID BIT(2) | |
210d4bc8 | 51 | #define TWL4030_BBCHEN BIT(4) |
94b05cab IH |
52 | #define TWL4030_BBSEL_MASK 0x0c |
53 | #define TWL4030_BBSEL_2V5 0x00 | |
54 | #define TWL4030_BBSEL_3V0 0x04 | |
55 | #define TWL4030_BBSEL_3V1 0x08 | |
56 | #define TWL4030_BBSEL_3V2 0x0c | |
57 | #define TWL4030_BBISEL_MASK 0x03 | |
58 | #define TWL4030_BBISEL_25uA 0x00 | |
59 | #define TWL4030_BBISEL_150uA 0x01 | |
60 | #define TWL4030_BBISEL_500uA 0x02 | |
61 | #define TWL4030_BBISEL_1000uA 0x03 | |
2e727f17 | 62 | |
61a7784e NM |
63 | #define TWL4030_BATSTSPCHG BIT(2) |
64 | #define TWL4030_BATSTSMCHG BIT(6) | |
65 | ||
2e727f17 GI |
66 | /* BCI interrupts */ |
67 | #define TWL4030_WOVF BIT(0) /* Watchdog overflow */ | |
68 | #define TWL4030_TMOVF BIT(1) /* Timer overflow */ | |
69 | #define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */ | |
70 | #define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */ | |
71 | #define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */ | |
72 | #define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */ | |
73 | #define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */ | |
74 | #define TWL4030_BATSTS BIT(7) /* Battery status */ | |
75 | ||
76 | #define TWL4030_VBATLVL BIT(0) /* VBAT level */ | |
77 | #define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */ | |
78 | #define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */ | |
79 | #define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */ | |
80 | ||
81 | #define TWL4030_MSTATEC_USB BIT(4) | |
82 | #define TWL4030_MSTATEC_AC BIT(5) | |
83 | #define TWL4030_MSTATEC_MASK 0x0f | |
84 | #define TWL4030_MSTATEC_QUICK1 0x02 | |
85 | #define TWL4030_MSTATEC_QUICK7 0x07 | |
86 | #define TWL4030_MSTATEC_COMPLETE1 0x0b | |
87 | #define TWL4030_MSTATEC_COMPLETE4 0x0e | |
88 | ||
89 | static bool allow_usb; | |
28d48f04 | 90 | module_param(allow_usb, bool, 0644); |
2e727f17 GI |
91 | MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current"); |
92 | ||
93 | struct twl4030_bci { | |
94 | struct device *dev; | |
297d716f KK |
95 | struct power_supply *ac; |
96 | struct power_supply *usb; | |
86753811 | 97 | struct usb_phy *transceiver; |
fcc8ebc9 | 98 | struct notifier_block usb_nb; |
d6ccc442 | 99 | struct work_struct work; |
2e727f17 GI |
100 | int irq_chg; |
101 | int irq_bci; | |
ab37813f | 102 | int usb_enabled; |
d6ccc442 | 103 | |
1098cb58 | 104 | /* |
e4ae537e N |
105 | * ichg_* and *_cur values in uA. If any are 'large', we set |
106 | * CGAIN to '1' which doubles the range for half the | |
107 | * precision. | |
1098cb58 | 108 | */ |
e4ae537e N |
109 | unsigned int ichg_eoc, ichg_lo, ichg_hi; |
110 | unsigned int usb_cur, ac_cur; | |
111 | bool ac_is_active; | |
1098cb58 | 112 | |
d6ccc442 | 113 | unsigned long event; |
2e727f17 GI |
114 | }; |
115 | ||
116 | /* | |
117 | * clear and set bits on an given register on a given module | |
118 | */ | |
119 | static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg) | |
120 | { | |
121 | u8 val = 0; | |
122 | int ret; | |
123 | ||
124 | ret = twl_i2c_read_u8(mod_no, &val, reg); | |
125 | if (ret) | |
126 | return ret; | |
127 | ||
128 | val &= ~clear; | |
129 | val |= set; | |
130 | ||
131 | return twl_i2c_write_u8(mod_no, val, reg); | |
132 | } | |
133 | ||
134 | static int twl4030_bci_read(u8 reg, u8 *val) | |
135 | { | |
e9f14c18 | 136 | return twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, val, reg); |
2e727f17 GI |
137 | } |
138 | ||
139 | static int twl4030_clear_set_boot_bci(u8 clear, u8 set) | |
140 | { | |
e9f14c18 | 141 | return twl4030_clear_set(TWL_MODULE_PM_MASTER, clear, |
2e727f17 GI |
142 | TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set, |
143 | TWL4030_PM_MASTER_BOOT_BCI); | |
144 | } | |
145 | ||
146 | static int twl4030bci_read_adc_val(u8 reg) | |
147 | { | |
148 | int ret, temp; | |
149 | u8 val; | |
150 | ||
151 | /* read MSB */ | |
152 | ret = twl4030_bci_read(reg + 1, &val); | |
153 | if (ret) | |
154 | return ret; | |
155 | ||
156 | temp = (int)(val & 0x03) << 8; | |
157 | ||
158 | /* read LSB */ | |
159 | ret = twl4030_bci_read(reg, &val); | |
160 | if (ret) | |
161 | return ret; | |
162 | ||
163 | return temp | val; | |
164 | } | |
165 | ||
61a7784e NM |
166 | /* |
167 | * Check if Battery Pack was present | |
168 | */ | |
169 | static int twl4030_is_battery_present(struct twl4030_bci *bci) | |
170 | { | |
171 | int ret; | |
172 | u8 val = 0; | |
173 | ||
174 | /* Battery presence in Main charge? */ | |
175 | ret = twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, &val, TWL4030_BCIMFSTS3); | |
176 | if (ret) | |
177 | return ret; | |
178 | if (val & TWL4030_BATSTSMCHG) | |
179 | return 0; | |
180 | ||
181 | /* | |
182 | * OK, It could be that bootloader did not enable main charger, | |
183 | * pre-charge is h/w auto. So, Battery presence in Pre-charge? | |
184 | */ | |
185 | ret = twl_i2c_read_u8(TWL4030_MODULE_PRECHARGE, &val, | |
186 | TWL4030_BCIMFSTS1); | |
187 | if (ret) | |
188 | return ret; | |
189 | if (val & TWL4030_BATSTSPCHG) | |
190 | return 0; | |
191 | ||
192 | return -ENODEV; | |
193 | } | |
194 | ||
3b542f08 N |
195 | /* |
196 | * TI provided formulas: | |
197 | * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85 | |
198 | * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7 | |
199 | * Here we use integer approximation of: | |
200 | * CGAIN == 0: val * 1.6618 - 0.85 * 1000 | |
201 | * CGAIN == 1: (val * 1.6618 - 0.85 * 1000) * 2 | |
202 | */ | |
203 | /* | |
204 | * convert twl register value for currents into uA | |
205 | */ | |
206 | static int regval2ua(int regval, bool cgain) | |
207 | { | |
208 | if (cgain) | |
209 | return (regval * 16618 - 8500 * 1000) / 5; | |
210 | else | |
211 | return (regval * 16618 - 8500 * 1000) / 10; | |
212 | } | |
213 | ||
214 | /* | |
215 | * convert uA currents into twl register value | |
216 | */ | |
217 | static int ua2regval(int ua, bool cgain) | |
218 | { | |
219 | int ret; | |
220 | if (cgain) | |
221 | ua /= 2; | |
222 | ret = (ua * 10 + 8500 * 1000) / 16618; | |
223 | /* rounding problems */ | |
224 | if (ret < 512) | |
225 | ret = 512; | |
226 | return ret; | |
227 | } | |
228 | ||
1098cb58 N |
229 | static int twl4030_charger_update_current(struct twl4030_bci *bci) |
230 | { | |
231 | int status; | |
e4ae537e | 232 | int cur; |
1098cb58 N |
233 | unsigned reg, cur_reg; |
234 | u8 bcictl1, oldreg, fullreg; | |
235 | bool cgain = false; | |
236 | u8 boot_bci; | |
237 | ||
e4ae537e N |
238 | /* |
239 | * If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11) | |
240 | * and AC is enabled, set current for 'ac' | |
241 | */ | |
242 | if (twl4030_get_madc_conversion(11) > 4500) { | |
243 | cur = bci->ac_cur; | |
244 | bci->ac_is_active = true; | |
245 | } else { | |
246 | cur = bci->usb_cur; | |
247 | bci->ac_is_active = false; | |
248 | } | |
249 | ||
1098cb58 N |
250 | /* First, check thresholds and see if cgain is needed */ |
251 | if (bci->ichg_eoc >= 200000) | |
252 | cgain = true; | |
253 | if (bci->ichg_lo >= 400000) | |
254 | cgain = true; | |
255 | if (bci->ichg_hi >= 820000) | |
256 | cgain = true; | |
e4ae537e | 257 | if (cur > 852000) |
1098cb58 N |
258 | cgain = true; |
259 | ||
260 | status = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); | |
261 | if (status < 0) | |
262 | return status; | |
263 | if (twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &boot_bci, | |
264 | TWL4030_PM_MASTER_BOOT_BCI) < 0) | |
265 | boot_bci = 0; | |
266 | boot_bci &= 7; | |
267 | ||
268 | if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN)) | |
269 | /* Need to turn for charging while we change the | |
270 | * CGAIN bit. Leave it off while everything is | |
271 | * updated. | |
272 | */ | |
273 | twl4030_clear_set_boot_bci(boot_bci, 0); | |
274 | ||
275 | /* | |
276 | * For ichg_eoc, the hardware only supports reg values matching | |
277 | * 100XXXX000, and requires the XXXX be stored in the high nibble | |
278 | * of TWL4030_BCIMFTH8. | |
279 | */ | |
280 | reg = ua2regval(bci->ichg_eoc, cgain); | |
281 | if (reg > 0x278) | |
282 | reg = 0x278; | |
283 | if (reg < 0x200) | |
284 | reg = 0x200; | |
285 | reg = (reg >> 3) & 0xf; | |
286 | fullreg = reg << 4; | |
287 | ||
288 | /* | |
289 | * For ichg_lo, reg value must match 10XXXX0000. | |
290 | * XXXX is stored in low nibble of TWL4030_BCIMFTH8. | |
291 | */ | |
292 | reg = ua2regval(bci->ichg_lo, cgain); | |
293 | if (reg > 0x2F0) | |
294 | reg = 0x2F0; | |
295 | if (reg < 0x200) | |
296 | reg = 0x200; | |
297 | reg = (reg >> 4) & 0xf; | |
298 | fullreg |= reg; | |
299 | ||
300 | /* ichg_eoc and ichg_lo live in same register */ | |
301 | status = twl4030_bci_read(TWL4030_BCIMFTH8, &oldreg); | |
302 | if (status < 0) | |
303 | return status; | |
304 | if (oldreg != fullreg) { | |
305 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xF4, | |
306 | TWL4030_BCIMFKEY); | |
307 | if (status < 0) | |
308 | return status; | |
309 | twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
310 | fullreg, TWL4030_BCIMFTH8); | |
311 | } | |
312 | ||
313 | /* ichg_hi threshold must be 1XXXX01100 (I think) */ | |
314 | reg = ua2regval(bci->ichg_hi, cgain); | |
315 | if (reg > 0x3E0) | |
316 | reg = 0x3E0; | |
317 | if (reg < 0x200) | |
318 | reg = 0x200; | |
319 | fullreg = (reg >> 5) & 0xF; | |
320 | fullreg <<= 4; | |
321 | status = twl4030_bci_read(TWL4030_BCIMFTH9, &oldreg); | |
322 | if (status < 0) | |
323 | return status; | |
324 | if ((oldreg & 0xF0) != fullreg) { | |
325 | fullreg |= (oldreg & 0x0F); | |
326 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, | |
327 | TWL4030_BCIMFKEY); | |
328 | if (status < 0) | |
329 | return status; | |
330 | twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
331 | fullreg, TWL4030_BCIMFTH9); | |
332 | } | |
333 | ||
334 | /* | |
335 | * And finally, set the current. This is stored in | |
336 | * two registers. | |
337 | */ | |
e4ae537e | 338 | reg = ua2regval(cur, cgain); |
1098cb58 N |
339 | /* we have only 10 bits */ |
340 | if (reg > 0x3ff) | |
341 | reg = 0x3ff; | |
342 | status = twl4030_bci_read(TWL4030_BCIIREF1, &oldreg); | |
343 | if (status < 0) | |
344 | return status; | |
345 | cur_reg = oldreg; | |
346 | status = twl4030_bci_read(TWL4030_BCIIREF2, &oldreg); | |
347 | if (status < 0) | |
348 | return status; | |
349 | cur_reg |= oldreg << 8; | |
350 | if (reg != oldreg) { | |
351 | /* disable write protection for one write access for | |
352 | * BCIIREF */ | |
353 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, | |
354 | TWL4030_BCIMFKEY); | |
355 | if (status < 0) | |
356 | return status; | |
357 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
358 | (reg & 0x100) ? 3 : 2, | |
359 | TWL4030_BCIIREF2); | |
360 | if (status < 0) | |
361 | return status; | |
362 | /* disable write protection for one write access for | |
363 | * BCIIREF */ | |
364 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, | |
365 | TWL4030_BCIMFKEY); | |
366 | if (status < 0) | |
367 | return status; | |
368 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
369 | reg & 0xff, | |
370 | TWL4030_BCIIREF1); | |
371 | } | |
372 | if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN)) { | |
373 | /* Flip CGAIN and re-enable charging */ | |
374 | bcictl1 ^= TWL4030_CGAIN; | |
375 | twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, | |
376 | bcictl1, TWL4030_BCICTL1); | |
377 | twl4030_clear_set_boot_bci(0, boot_bci); | |
378 | } | |
379 | return 0; | |
380 | } | |
381 | ||
2e727f17 | 382 | /* |
9c645d2f | 383 | * Enable/Disable USB Charge functionality. |
2e727f17 GI |
384 | */ |
385 | static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) | |
386 | { | |
387 | int ret; | |
388 | ||
e57c4a67 | 389 | if (enable && !IS_ERR_OR_NULL(bci->transceiver)) { |
2e727f17 | 390 | |
e4ae537e N |
391 | twl4030_charger_update_current(bci); |
392 | ||
e57c4a67 | 393 | /* Need to keep phy powered */ |
ab37813f | 394 | if (!bci->usb_enabled) { |
e57c4a67 | 395 | pm_runtime_get_sync(bci->transceiver->dev); |
ab37813f N |
396 | bci->usb_enabled = 1; |
397 | } | |
398 | ||
2e727f17 GI |
399 | /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */ |
400 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB); | |
401 | if (ret < 0) | |
402 | return ret; | |
403 | ||
404 | /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */ | |
e9f14c18 | 405 | ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0, |
2e727f17 GI |
406 | TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4); |
407 | } else { | |
408 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0); | |
ab37813f | 409 | if (bci->usb_enabled) { |
e57c4a67 N |
410 | pm_runtime_mark_last_busy(bci->transceiver->dev); |
411 | pm_runtime_put_autosuspend(bci->transceiver->dev); | |
ab37813f N |
412 | bci->usb_enabled = 0; |
413 | } | |
2e727f17 GI |
414 | } |
415 | ||
416 | return ret; | |
417 | } | |
418 | ||
419 | /* | |
420 | * Enable/Disable AC Charge funtionality. | |
421 | */ | |
422 | static int twl4030_charger_enable_ac(bool enable) | |
423 | { | |
424 | int ret; | |
425 | ||
426 | if (enable) | |
427 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC); | |
428 | else | |
429 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0); | |
430 | ||
431 | return ret; | |
432 | } | |
433 | ||
210d4bc8 N |
434 | /* |
435 | * Enable/Disable charging of Backup Battery. | |
436 | */ | |
437 | static int twl4030_charger_enable_backup(int uvolt, int uamp) | |
438 | { | |
439 | int ret; | |
440 | u8 flags; | |
441 | ||
442 | if (uvolt < 2500000 || | |
443 | uamp < 25) { | |
444 | /* disable charging of backup battery */ | |
e9f14c18 | 445 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
210d4bc8 N |
446 | TWL4030_BBCHEN, 0, TWL4030_BB_CFG); |
447 | return ret; | |
448 | } | |
449 | ||
450 | flags = TWL4030_BBCHEN; | |
451 | if (uvolt >= 3200000) | |
452 | flags |= TWL4030_BBSEL_3V2; | |
453 | else if (uvolt >= 3100000) | |
454 | flags |= TWL4030_BBSEL_3V1; | |
455 | else if (uvolt >= 3000000) | |
456 | flags |= TWL4030_BBSEL_3V0; | |
457 | else | |
458 | flags |= TWL4030_BBSEL_2V5; | |
459 | ||
460 | if (uamp >= 1000) | |
461 | flags |= TWL4030_BBISEL_1000uA; | |
462 | else if (uamp >= 500) | |
463 | flags |= TWL4030_BBISEL_500uA; | |
464 | else if (uamp >= 150) | |
465 | flags |= TWL4030_BBISEL_150uA; | |
466 | else | |
467 | flags |= TWL4030_BBISEL_25uA; | |
468 | ||
e9f14c18 | 469 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
210d4bc8 N |
470 | TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK, |
471 | flags, | |
472 | TWL4030_BB_CFG); | |
473 | ||
474 | return ret; | |
475 | } | |
476 | ||
2e727f17 GI |
477 | /* |
478 | * TWL4030 CHG_PRES (AC charger presence) events | |
479 | */ | |
480 | static irqreturn_t twl4030_charger_interrupt(int irq, void *arg) | |
481 | { | |
482 | struct twl4030_bci *bci = arg; | |
483 | ||
484 | dev_dbg(bci->dev, "CHG_PRES irq\n"); | |
e4ae537e | 485 | twl4030_charger_update_current(bci); |
297d716f KK |
486 | power_supply_changed(bci->ac); |
487 | power_supply_changed(bci->usb); | |
2e727f17 GI |
488 | |
489 | return IRQ_HANDLED; | |
490 | } | |
491 | ||
492 | /* | |
493 | * TWL4030 BCI monitoring events | |
494 | */ | |
495 | static irqreturn_t twl4030_bci_interrupt(int irq, void *arg) | |
496 | { | |
497 | struct twl4030_bci *bci = arg; | |
498 | u8 irqs1, irqs2; | |
499 | int ret; | |
500 | ||
501 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1, | |
502 | TWL4030_INTERRUPTS_BCIISR1A); | |
503 | if (ret < 0) | |
504 | return IRQ_HANDLED; | |
505 | ||
506 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2, | |
507 | TWL4030_INTERRUPTS_BCIISR2A); | |
508 | if (ret < 0) | |
509 | return IRQ_HANDLED; | |
510 | ||
511 | dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1); | |
512 | ||
513 | if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) { | |
514 | /* charger state change, inform the core */ | |
297d716f KK |
515 | power_supply_changed(bci->ac); |
516 | power_supply_changed(bci->usb); | |
2e727f17 | 517 | } |
e4ae537e | 518 | twl4030_charger_update_current(bci); |
2e727f17 GI |
519 | |
520 | /* various monitoring events, for now we just log them here */ | |
521 | if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1)) | |
522 | dev_warn(bci->dev, "battery temperature out of range\n"); | |
523 | ||
524 | if (irqs1 & TWL4030_BATSTS) | |
525 | dev_crit(bci->dev, "battery disconnected\n"); | |
526 | ||
527 | if (irqs2 & TWL4030_VBATOV) | |
528 | dev_crit(bci->dev, "VBAT overvoltage\n"); | |
529 | ||
530 | if (irqs2 & TWL4030_VBUSOV) | |
531 | dev_crit(bci->dev, "VBUS overvoltage\n"); | |
532 | ||
533 | if (irqs2 & TWL4030_ACCHGOV) | |
534 | dev_crit(bci->dev, "Ac charger overvoltage\n"); | |
535 | ||
536 | return IRQ_HANDLED; | |
537 | } | |
538 | ||
d6ccc442 | 539 | static void twl4030_bci_usb_work(struct work_struct *data) |
2e727f17 | 540 | { |
d6ccc442 | 541 | struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work); |
2e727f17 | 542 | |
d6ccc442 | 543 | switch (bci->event) { |
2e727f17 GI |
544 | case USB_EVENT_VBUS: |
545 | case USB_EVENT_CHARGER: | |
546 | twl4030_charger_enable_usb(bci, true); | |
547 | break; | |
548 | case USB_EVENT_NONE: | |
549 | twl4030_charger_enable_usb(bci, false); | |
550 | break; | |
551 | } | |
d6ccc442 HK |
552 | } |
553 | ||
554 | static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val, | |
555 | void *priv) | |
556 | { | |
fcc8ebc9 | 557 | struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, usb_nb); |
d6ccc442 HK |
558 | |
559 | dev_dbg(bci->dev, "OTG notify %lu\n", val); | |
560 | ||
561 | bci->event = val; | |
562 | schedule_work(&bci->work); | |
2e727f17 GI |
563 | |
564 | return NOTIFY_OK; | |
565 | } | |
566 | ||
2e727f17 GI |
567 | static int twl4030_charger_get_current(void) |
568 | { | |
569 | int curr; | |
570 | int ret; | |
571 | u8 bcictl1; | |
572 | ||
573 | curr = twl4030bci_read_adc_val(TWL4030_BCIICHG); | |
574 | if (curr < 0) | |
575 | return curr; | |
576 | ||
577 | ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); | |
578 | if (ret) | |
579 | return ret; | |
580 | ||
3b542f08 | 581 | return regval2ua(curr, bcictl1 & TWL4030_CGAIN); |
2e727f17 GI |
582 | } |
583 | ||
584 | /* | |
585 | * Returns the main charge FSM state | |
586 | * Or < 0 on failure. | |
587 | */ | |
588 | static int twl4030bci_state(struct twl4030_bci *bci) | |
589 | { | |
590 | int ret; | |
591 | u8 state; | |
592 | ||
593 | ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state); | |
594 | if (ret) { | |
595 | pr_err("twl4030_bci: error reading BCIMSTATEC\n"); | |
596 | return ret; | |
597 | } | |
598 | ||
599 | dev_dbg(bci->dev, "state: %02x\n", state); | |
600 | ||
601 | return state; | |
602 | } | |
603 | ||
604 | static int twl4030_bci_state_to_status(int state) | |
605 | { | |
606 | state &= TWL4030_MSTATEC_MASK; | |
607 | if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7) | |
608 | return POWER_SUPPLY_STATUS_CHARGING; | |
609 | else if (TWL4030_MSTATEC_COMPLETE1 <= state && | |
610 | state <= TWL4030_MSTATEC_COMPLETE4) | |
611 | return POWER_SUPPLY_STATUS_FULL; | |
612 | else | |
613 | return POWER_SUPPLY_STATUS_NOT_CHARGING; | |
614 | } | |
615 | ||
616 | static int twl4030_bci_get_property(struct power_supply *psy, | |
617 | enum power_supply_property psp, | |
618 | union power_supply_propval *val) | |
619 | { | |
297d716f | 620 | struct twl4030_bci *bci = dev_get_drvdata(psy->dev.parent); |
2e727f17 GI |
621 | int is_charging; |
622 | int state; | |
623 | int ret; | |
624 | ||
625 | state = twl4030bci_state(bci); | |
626 | if (state < 0) | |
627 | return state; | |
628 | ||
297d716f | 629 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) |
2e727f17 GI |
630 | is_charging = state & TWL4030_MSTATEC_USB; |
631 | else | |
632 | is_charging = state & TWL4030_MSTATEC_AC; | |
633 | ||
634 | switch (psp) { | |
635 | case POWER_SUPPLY_PROP_STATUS: | |
636 | if (is_charging) | |
637 | val->intval = twl4030_bci_state_to_status(state); | |
638 | else | |
639 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
640 | break; | |
641 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
642 | /* charging must be active for meaningful result */ | |
643 | if (!is_charging) | |
644 | return -ENODATA; | |
297d716f | 645 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) { |
2e727f17 GI |
646 | ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS); |
647 | if (ret < 0) | |
648 | return ret; | |
649 | /* BCIVBUS uses ADCIN8, 7/1023 V/step */ | |
650 | val->intval = ret * 6843; | |
651 | } else { | |
652 | ret = twl4030bci_read_adc_val(TWL4030_BCIVAC); | |
653 | if (ret < 0) | |
654 | return ret; | |
655 | /* BCIVAC uses ADCIN11, 10/1023 V/step */ | |
656 | val->intval = ret * 9775; | |
657 | } | |
658 | break; | |
659 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
660 | if (!is_charging) | |
661 | return -ENODATA; | |
662 | /* current measurement is shared between AC and USB */ | |
663 | ret = twl4030_charger_get_current(); | |
664 | if (ret < 0) | |
665 | return ret; | |
666 | val->intval = ret; | |
667 | break; | |
668 | case POWER_SUPPLY_PROP_ONLINE: | |
669 | val->intval = is_charging && | |
670 | twl4030_bci_state_to_status(state) != | |
671 | POWER_SUPPLY_STATUS_NOT_CHARGING; | |
672 | break; | |
673 | default: | |
674 | return -EINVAL; | |
675 | } | |
676 | ||
677 | return 0; | |
678 | } | |
679 | ||
680 | static enum power_supply_property twl4030_charger_props[] = { | |
681 | POWER_SUPPLY_PROP_STATUS, | |
682 | POWER_SUPPLY_PROP_ONLINE, | |
683 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
684 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
685 | }; | |
686 | ||
ec0b3802 N |
687 | #ifdef CONFIG_OF |
688 | static const struct twl4030_bci_platform_data * | |
689 | twl4030_bci_parse_dt(struct device *dev) | |
690 | { | |
691 | struct device_node *np = dev->of_node; | |
692 | struct twl4030_bci_platform_data *pdata; | |
693 | u32 num; | |
694 | ||
695 | if (!np) | |
696 | return NULL; | |
697 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
698 | if (!pdata) | |
699 | return pdata; | |
700 | ||
701 | if (of_property_read_u32(np, "ti,bb-uvolt", &num) == 0) | |
702 | pdata->bb_uvolt = num; | |
703 | if (of_property_read_u32(np, "ti,bb-uamp", &num) == 0) | |
704 | pdata->bb_uamp = num; | |
705 | return pdata; | |
706 | } | |
707 | #else | |
708 | static inline const struct twl4030_bci_platform_data * | |
709 | twl4030_bci_parse_dt(struct device *dev) | |
710 | { | |
711 | return NULL; | |
712 | } | |
713 | #endif | |
714 | ||
297d716f KK |
715 | static const struct power_supply_desc twl4030_bci_ac_desc = { |
716 | .name = "twl4030_ac", | |
717 | .type = POWER_SUPPLY_TYPE_MAINS, | |
718 | .properties = twl4030_charger_props, | |
719 | .num_properties = ARRAY_SIZE(twl4030_charger_props), | |
720 | .get_property = twl4030_bci_get_property, | |
721 | }; | |
722 | ||
723 | static const struct power_supply_desc twl4030_bci_usb_desc = { | |
724 | .name = "twl4030_usb", | |
725 | .type = POWER_SUPPLY_TYPE_USB, | |
726 | .properties = twl4030_charger_props, | |
727 | .num_properties = ARRAY_SIZE(twl4030_charger_props), | |
728 | .get_property = twl4030_bci_get_property, | |
729 | }; | |
730 | ||
7396f708 | 731 | static int twl4030_bci_probe(struct platform_device *pdev) |
2e727f17 GI |
732 | { |
733 | struct twl4030_bci *bci; | |
ec0b3802 | 734 | const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data; |
2e727f17 | 735 | int ret; |
28d48f04 | 736 | u32 reg; |
2e727f17 | 737 | |
325b50aa | 738 | bci = devm_kzalloc(&pdev->dev, sizeof(*bci), GFP_KERNEL); |
2e727f17 GI |
739 | if (bci == NULL) |
740 | return -ENOMEM; | |
741 | ||
ec0b3802 N |
742 | if (!pdata) |
743 | pdata = twl4030_bci_parse_dt(&pdev->dev); | |
744 | ||
1098cb58 N |
745 | bci->ichg_eoc = 80100; /* Stop charging when current drops to here */ |
746 | bci->ichg_lo = 241000; /* Low threshold */ | |
747 | bci->ichg_hi = 500000; /* High threshold */ | |
e4ae537e | 748 | bci->ac_cur = 500000; /* 500mA */ |
1098cb58 | 749 | if (allow_usb) |
e4ae537e | 750 | bci->usb_cur = 500000; /* 500mA */ |
1098cb58 | 751 | else |
e4ae537e | 752 | bci->usb_cur = 100000; /* 100mA */ |
1098cb58 | 753 | |
2e727f17 GI |
754 | bci->dev = &pdev->dev; |
755 | bci->irq_chg = platform_get_irq(pdev, 0); | |
756 | bci->irq_bci = platform_get_irq(pdev, 1); | |
757 | ||
61a7784e NM |
758 | /* Only proceed further *IF* battery is physically present */ |
759 | ret = twl4030_is_battery_present(bci); | |
760 | if (ret) { | |
761 | dev_crit(&pdev->dev, "Battery was not detected:%d\n", ret); | |
325b50aa | 762 | return ret; |
61a7784e | 763 | } |
2e727f17 | 764 | |
61a7784e | 765 | platform_set_drvdata(pdev, bci); |
2e727f17 | 766 | |
325b50aa N |
767 | bci->ac = devm_power_supply_register(&pdev->dev, &twl4030_bci_ac_desc, |
768 | NULL); | |
297d716f KK |
769 | if (IS_ERR(bci->ac)) { |
770 | ret = PTR_ERR(bci->ac); | |
2e727f17 | 771 | dev_err(&pdev->dev, "failed to register ac: %d\n", ret); |
325b50aa | 772 | return ret; |
2e727f17 GI |
773 | } |
774 | ||
325b50aa N |
775 | bci->usb = devm_power_supply_register(&pdev->dev, &twl4030_bci_usb_desc, |
776 | NULL); | |
297d716f KK |
777 | if (IS_ERR(bci->usb)) { |
778 | ret = PTR_ERR(bci->usb); | |
2e727f17 | 779 | dev_err(&pdev->dev, "failed to register usb: %d\n", ret); |
325b50aa | 780 | return ret; |
2e727f17 GI |
781 | } |
782 | ||
1b7cac23 | 783 | ret = devm_request_threaded_irq(&pdev->dev, bci->irq_chg, NULL, |
a2778b0f FW |
784 | twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name, |
785 | bci); | |
2e727f17 GI |
786 | if (ret < 0) { |
787 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", | |
788 | bci->irq_chg, ret); | |
325b50aa | 789 | return ret; |
2e727f17 GI |
790 | } |
791 | ||
1b7cac23 | 792 | ret = devm_request_threaded_irq(&pdev->dev, bci->irq_bci, NULL, |
a2778b0f | 793 | twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci); |
2e727f17 GI |
794 | if (ret < 0) { |
795 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", | |
796 | bci->irq_bci, ret); | |
325b50aa | 797 | return ret; |
2e727f17 GI |
798 | } |
799 | ||
d6ccc442 HK |
800 | INIT_WORK(&bci->work, twl4030_bci_usb_work); |
801 | ||
f5e4edb8 N |
802 | bci->usb_nb.notifier_call = twl4030_bci_usb_ncb; |
803 | if (bci->dev->of_node) { | |
804 | struct device_node *phynode; | |
805 | ||
806 | phynode = of_find_compatible_node(bci->dev->of_node->parent, | |
807 | NULL, "ti,twl4030-usb"); | |
3fc3895e | 808 | if (phynode) { |
f5e4edb8 N |
809 | bci->transceiver = devm_usb_get_phy_by_node( |
810 | bci->dev, phynode, &bci->usb_nb); | |
3fc3895e N |
811 | if (IS_ERR(bci->transceiver) && |
812 | PTR_ERR(bci->transceiver) == -EPROBE_DEFER) | |
813 | return -EPROBE_DEFER; | |
814 | } | |
2e727f17 GI |
815 | } |
816 | ||
817 | /* Enable interrupts now. */ | |
28d48f04 | 818 | reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 | |
2e727f17 GI |
819 | TWL4030_TBATOR1 | TWL4030_BATSTS); |
820 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, | |
821 | TWL4030_INTERRUPTS_BCIIMR1A); | |
822 | if (ret < 0) { | |
823 | dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret); | |
325b50aa | 824 | return ret; |
2e727f17 GI |
825 | } |
826 | ||
28d48f04 | 827 | reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV); |
2e727f17 GI |
828 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, |
829 | TWL4030_INTERRUPTS_BCIIMR2A); | |
830 | if (ret < 0) | |
831 | dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret); | |
832 | ||
1098cb58 | 833 | twl4030_charger_update_current(bci); |
2e727f17 | 834 | twl4030_charger_enable_ac(true); |
6e37ec8c N |
835 | if (!IS_ERR_OR_NULL(bci->transceiver)) |
836 | twl4030_bci_usb_ncb(&bci->usb_nb, | |
837 | bci->transceiver->last_event, | |
838 | NULL); | |
839 | else | |
840 | twl4030_charger_enable_usb(bci, false); | |
ec0b3802 N |
841 | if (pdata) |
842 | twl4030_charger_enable_backup(pdata->bb_uvolt, | |
843 | pdata->bb_uamp); | |
844 | else | |
845 | twl4030_charger_enable_backup(0, 0); | |
2e727f17 GI |
846 | |
847 | return 0; | |
2e727f17 GI |
848 | } |
849 | ||
850 | static int __exit twl4030_bci_remove(struct platform_device *pdev) | |
851 | { | |
852 | struct twl4030_bci *bci = platform_get_drvdata(pdev); | |
853 | ||
854 | twl4030_charger_enable_ac(false); | |
855 | twl4030_charger_enable_usb(bci, false); | |
210d4bc8 | 856 | twl4030_charger_enable_backup(0, 0); |
2e727f17 GI |
857 | |
858 | /* mask interrupts */ | |
859 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, | |
860 | TWL4030_INTERRUPTS_BCIIMR1A); | |
861 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, | |
862 | TWL4030_INTERRUPTS_BCIIMR2A); | |
863 | ||
2e727f17 GI |
864 | return 0; |
865 | } | |
866 | ||
ec0b3802 N |
867 | static const struct of_device_id twl_bci_of_match[] = { |
868 | {.compatible = "ti,twl4030-bci", }, | |
869 | { } | |
870 | }; | |
871 | MODULE_DEVICE_TABLE(of, twl_bci_of_match); | |
872 | ||
2e727f17 | 873 | static struct platform_driver twl4030_bci_driver = { |
7396f708 | 874 | .probe = twl4030_bci_probe, |
2e727f17 GI |
875 | .driver = { |
876 | .name = "twl4030_bci", | |
ec0b3802 | 877 | .of_match_table = of_match_ptr(twl_bci_of_match), |
2e727f17 GI |
878 | }, |
879 | .remove = __exit_p(twl4030_bci_remove), | |
880 | }; | |
7396f708 | 881 | module_platform_driver(twl4030_bci_driver); |
2e727f17 | 882 | |
28d48f04 | 883 | MODULE_AUTHOR("Gražvydas Ignotas"); |
2e727f17 GI |
884 | MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver"); |
885 | MODULE_LICENSE("GPL"); | |
886 | MODULE_ALIAS("platform:twl4030_bci"); |