1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* Copyright (c) 2014, Sony Mobile Communications Inc. |
3 | * |
4 | * This driver is for the multi-block Switch-Mode Battery Charger and Boost |
5 | * (SMBB) hardware, found in Qualcomm PM8941 PMICs. The charger is an |
6 | * integrated, single-cell lithium-ion battery charger. |
7 | * |
8 | * Sub-components: |
9 | * - Charger core |
10 | * - Buck |
11 | * - DC charge-path |
12 | * - USB charge-path |
13 | * - Battery interface |
14 | * - Boost (not implemented) |
15 | * - Misc |
16 | * - HF-Buck |
17 | */ |
18 | |
19 | #include <linux/errno.h> |
20 | #include <linux/interrupt.h> |
21 | #include <linux/kernel.h> |
22 | #include <linux/module.h> |
23 | #include <linux/mutex.h> |
24 | #include <linux/of.h> |
25 | #include <linux/platform_device.h> |
26 | #include <linux/power_supply.h> |
27 | #include <linux/regmap.h> |
28 | #include <linux/slab.h> |
29 | #include <linux/extcon-provider.h> |
30 | #include <linux/regulator/driver.h> |
31 | |
32 | #define SMBB_CHG_VMAX 0x040 |
33 | #define SMBB_CHG_VSAFE 0x041 |
34 | #define SMBB_CHG_CFG 0x043 |
35 | #define SMBB_CHG_IMAX 0x044 |
36 | #define SMBB_CHG_ISAFE 0x045 |
37 | #define SMBB_CHG_VIN_MIN 0x047 |
38 | #define SMBB_CHG_CTRL 0x049 |
39 | #define CTRL_EN BIT(7) |
40 | #define SMBB_CHG_VBAT_WEAK 0x052 |
41 | #define SMBB_CHG_IBAT_TERM_CHG 0x05b |
42 | #define IBAT_TERM_CHG_IEOC BIT(7) |
43 | #define IBAT_TERM_CHG_IEOC_BMS BIT(7) |
44 | #define IBAT_TERM_CHG_IEOC_CHG 0 |
45 | #define SMBB_CHG_VBAT_DET 0x05d |
46 | #define SMBB_CHG_TCHG_MAX_EN 0x060 |
47 | #define TCHG_MAX_EN BIT(7) |
48 | #define SMBB_CHG_WDOG_TIME 0x062 |
49 | #define SMBB_CHG_WDOG_EN 0x065 |
50 | #define WDOG_EN BIT(7) |
51 | |
52 | #define SMBB_BUCK_REG_MODE 0x174 |
53 | #define BUCK_REG_MODE BIT(0) |
54 | #define BUCK_REG_MODE_VBAT BIT(0) |
55 | #define BUCK_REG_MODE_VSYS 0 |
56 | |
57 | #define SMBB_BAT_PRES_STATUS 0x208 |
58 | #define PRES_STATUS_BAT_PRES BIT(7) |
59 | #define SMBB_BAT_TEMP_STATUS 0x209 |
60 | #define TEMP_STATUS_OK BIT(7) |
61 | #define TEMP_STATUS_HOT BIT(6) |
62 | #define SMBB_BAT_BTC_CTRL 0x249 |
63 | #define BTC_CTRL_COMP_EN BIT(7) |
64 | #define BTC_CTRL_COLD_EXT BIT(1) |
65 | #define BTC_CTRL_HOT_EXT_N BIT(0) |
66 | |
67 | #define SMBB_USB_IMAX 0x344 |
68 | #define SMBB_USB_OTG_CTL 0x348 |
69 | #define OTG_CTL_EN BIT(0) |
70 | #define SMBB_USB_ENUM_TIMER_STOP 0x34e |
71 | #define ENUM_TIMER_STOP BIT(0) |
72 | #define SMBB_USB_SEC_ACCESS 0x3d0 |
73 | #define SEC_ACCESS_MAGIC 0xa5 |
74 | #define SMBB_USB_REV_BST 0x3ed |
75 | #define REV_BST_CHG_GONE BIT(7) |
76 | |
77 | #define SMBB_DC_IMAX 0x444 |
78 | |
79 | #define SMBB_MISC_REV2 0x601 |
80 | #define SMBB_MISC_BOOT_DONE 0x642 |
81 | #define BOOT_DONE BIT(7) |
82 | |
83 | #define STATUS_USBIN_VALID BIT(0) /* USB connection is valid */ |
84 | #define STATUS_DCIN_VALID BIT(1) /* DC connection is valid */ |
85 | #define STATUS_BAT_HOT BIT(2) /* Battery temp 1=Hot, 0=Cold */ |
86 | #define STATUS_BAT_OK BIT(3) /* Battery temp OK */ |
87 | #define STATUS_BAT_PRESENT BIT(4) /* Battery is present */ |
88 | #define STATUS_CHG_DONE BIT(5) /* Charge cycle is complete */ |
89 | #define STATUS_CHG_TRKL BIT(6) /* Trickle charging */ |
90 | #define STATUS_CHG_FAST BIT(7) /* Fast charging */ |
91 | #define STATUS_CHG_GONE BIT(8) /* No charger is connected */ |
92 | |
93 | enum smbb_attr { |
94 | ATTR_BAT_ISAFE, |
95 | ATTR_BAT_IMAX, |
96 | ATTR_USBIN_IMAX, |
97 | ATTR_DCIN_IMAX, |
98 | ATTR_BAT_VSAFE, |
99 | ATTR_BAT_VMAX, |
100 | ATTR_BAT_VMIN, |
101 | ATTR_CHG_VDET, |
102 | ATTR_VIN_MIN, |
103 | _ATTR_CNT, |
104 | }; |
105 | |
106 | struct smbb_charger { |
107 | unsigned int revision; |
108 | unsigned int addr; |
109 | struct device *dev; |
110 | struct extcon_dev *edev; |
111 | |
112 | bool dc_disabled; |
113 | bool jeita_ext_temp; |
114 | unsigned long status; |
115 | struct mutex statlock; |
116 | |
117 | unsigned int attr[_ATTR_CNT]; |
118 | |
119 | struct power_supply *usb_psy; |
120 | struct power_supply *dc_psy; |
121 | struct power_supply *bat_psy; |
122 | struct regmap *regmap; |
123 | |
124 | struct regulator_desc otg_rdesc; |
125 | struct regulator_dev *otg_reg; |
126 | }; |
127 | |
128 | static const unsigned int smbb_usb_extcon_cable[] = { |
129 | EXTCON_USB, |
130 | EXTCON_NONE, |
131 | }; |
132 | |
133 | static int smbb_vbat_weak_fn(unsigned int index) |
134 | { |
135 | return 2100000 + index * 100000; |
136 | } |
137 | |
138 | static int smbb_vin_fn(unsigned int index) |
139 | { |
140 | if (index > 42) |
141 | return 5600000 + (index - 43) * 200000; |
142 | return 3400000 + index * 50000; |
143 | } |
144 | |
145 | static int smbb_vmax_fn(unsigned int index) |
146 | { |
147 | return 3240000 + index * 10000; |
148 | } |
149 | |
150 | static int smbb_vbat_det_fn(unsigned int index) |
151 | { |
152 | return 3240000 + index * 20000; |
153 | } |
154 | |
155 | static int smbb_imax_fn(unsigned int index) |
156 | { |
157 | if (index < 2) |
158 | return 100000 + index * 50000; |
159 | return index * 100000; |
160 | } |
161 | |
162 | static int smbb_bat_imax_fn(unsigned int index) |
163 | { |
164 | return index * 50000; |
165 | } |
166 | |
167 | static unsigned int smbb_hw_lookup(unsigned int val, int (*fn)(unsigned int)) |
168 | { |
169 | unsigned int widx; |
170 | unsigned int sel; |
171 | |
172 | for (widx = sel = 0; (*fn)(widx) <= val; ++widx) |
173 | sel = widx; |
174 | |
175 | return sel; |
176 | } |
177 | |
178 | static const struct smbb_charger_attr { |
179 | const char *name; |
180 | unsigned int reg; |
181 | unsigned int safe_reg; |
182 | unsigned int max; |
183 | unsigned int min; |
184 | unsigned int fail_ok; |
185 | int (*hw_fn)(unsigned int); |
186 | } smbb_charger_attrs[] = { |
187 | [ATTR_BAT_ISAFE] = { |
188 | .name = "qcom,fast-charge-safe-current" , |
189 | .reg = SMBB_CHG_ISAFE, |
190 | .max = 3000000, |
191 | .min = 200000, |
192 | .hw_fn = smbb_bat_imax_fn, |
193 | .fail_ok = 1, |
194 | }, |
195 | [ATTR_BAT_IMAX] = { |
196 | .name = "qcom,fast-charge-current-limit" , |
197 | .reg = SMBB_CHG_IMAX, |
198 | .safe_reg = SMBB_CHG_ISAFE, |
199 | .max = 3000000, |
200 | .min = 200000, |
201 | .hw_fn = smbb_bat_imax_fn, |
202 | }, |
203 | [ATTR_DCIN_IMAX] = { |
204 | .name = "qcom,dc-current-limit" , |
205 | .reg = SMBB_DC_IMAX, |
206 | .max = 2500000, |
207 | .min = 100000, |
208 | .hw_fn = smbb_imax_fn, |
209 | }, |
210 | [ATTR_BAT_VSAFE] = { |
211 | .name = "qcom,fast-charge-safe-voltage" , |
212 | .reg = SMBB_CHG_VSAFE, |
213 | .max = 5000000, |
214 | .min = 3240000, |
215 | .hw_fn = smbb_vmax_fn, |
216 | .fail_ok = 1, |
217 | }, |
218 | [ATTR_BAT_VMAX] = { |
219 | .name = "qcom,fast-charge-high-threshold-voltage" , |
220 | .reg = SMBB_CHG_VMAX, |
221 | .safe_reg = SMBB_CHG_VSAFE, |
222 | .max = 5000000, |
223 | .min = 3240000, |
224 | .hw_fn = smbb_vmax_fn, |
225 | }, |
226 | [ATTR_BAT_VMIN] = { |
227 | .name = "qcom,fast-charge-low-threshold-voltage" , |
228 | .reg = SMBB_CHG_VBAT_WEAK, |
229 | .max = 3600000, |
230 | .min = 2100000, |
231 | .hw_fn = smbb_vbat_weak_fn, |
232 | }, |
233 | [ATTR_CHG_VDET] = { |
234 | .name = "qcom,auto-recharge-threshold-voltage" , |
235 | .reg = SMBB_CHG_VBAT_DET, |
236 | .max = 5000000, |
237 | .min = 3240000, |
238 | .hw_fn = smbb_vbat_det_fn, |
239 | }, |
240 | [ATTR_VIN_MIN] = { |
241 | .name = "qcom,minimum-input-voltage" , |
242 | .reg = SMBB_CHG_VIN_MIN, |
243 | .max = 9600000, |
244 | .min = 4200000, |
245 | .hw_fn = smbb_vin_fn, |
246 | }, |
247 | [ATTR_USBIN_IMAX] = { |
248 | .name = "usb-charge-current-limit" , |
249 | .reg = SMBB_USB_IMAX, |
250 | .max = 2500000, |
251 | .min = 100000, |
252 | .hw_fn = smbb_imax_fn, |
253 | }, |
254 | }; |
255 | |
256 | static int smbb_charger_attr_write(struct smbb_charger *chg, |
257 | enum smbb_attr which, unsigned int val) |
258 | { |
259 | const struct smbb_charger_attr *prop; |
260 | unsigned int wval; |
261 | unsigned int out; |
262 | int rc; |
263 | |
264 | prop = &smbb_charger_attrs[which]; |
265 | |
266 | if (val > prop->max || val < prop->min) { |
267 | dev_err(chg->dev, "value out of range for %s [%u:%u]\n" , |
268 | prop->name, prop->min, prop->max); |
269 | return -EINVAL; |
270 | } |
271 | |
272 | if (prop->safe_reg) { |
273 | rc = regmap_read(map: chg->regmap, |
274 | reg: chg->addr + prop->safe_reg, val: &wval); |
275 | if (rc) { |
276 | dev_err(chg->dev, |
277 | "unable to read safe value for '%s'\n" , |
278 | prop->name); |
279 | return rc; |
280 | } |
281 | |
282 | wval = prop->hw_fn(wval); |
283 | |
284 | if (val > wval) { |
285 | dev_warn(chg->dev, |
286 | "%s above safe value, clamping at %u\n" , |
287 | prop->name, wval); |
288 | val = wval; |
289 | } |
290 | } |
291 | |
292 | wval = smbb_hw_lookup(val, fn: prop->hw_fn); |
293 | |
294 | rc = regmap_write(map: chg->regmap, reg: chg->addr + prop->reg, val: wval); |
295 | if (rc) { |
296 | dev_err(chg->dev, "unable to update %s" , prop->name); |
297 | return rc; |
298 | } |
299 | out = prop->hw_fn(wval); |
300 | if (out != val) { |
301 | dev_warn(chg->dev, |
302 | "%s inaccurate, rounded to %u\n" , |
303 | prop->name, out); |
304 | } |
305 | |
306 | dev_dbg(chg->dev, "%s <= %d\n" , prop->name, out); |
307 | |
308 | chg->attr[which] = out; |
309 | |
310 | return 0; |
311 | } |
312 | |
313 | static int smbb_charger_attr_read(struct smbb_charger *chg, |
314 | enum smbb_attr which) |
315 | { |
316 | const struct smbb_charger_attr *prop; |
317 | unsigned int val; |
318 | int rc; |
319 | |
320 | prop = &smbb_charger_attrs[which]; |
321 | |
322 | rc = regmap_read(map: chg->regmap, reg: chg->addr + prop->reg, val: &val); |
323 | if (rc) { |
324 | dev_err(chg->dev, "failed to read %s\n" , prop->name); |
325 | return rc; |
326 | } |
327 | val = prop->hw_fn(val); |
328 | dev_dbg(chg->dev, "%s => %d\n" , prop->name, val); |
329 | |
330 | chg->attr[which] = val; |
331 | |
332 | return 0; |
333 | } |
334 | |
335 | static int smbb_charger_attr_parse(struct smbb_charger *chg, |
336 | enum smbb_attr which) |
337 | { |
338 | const struct smbb_charger_attr *prop; |
339 | unsigned int val; |
340 | int rc; |
341 | |
342 | prop = &smbb_charger_attrs[which]; |
343 | |
344 | rc = of_property_read_u32(np: chg->dev->of_node, propname: prop->name, out_value: &val); |
345 | if (rc == 0) { |
346 | rc = smbb_charger_attr_write(chg, which, val); |
347 | if (!rc || !prop->fail_ok) |
348 | return rc; |
349 | } |
350 | return smbb_charger_attr_read(chg, which); |
351 | } |
352 | |
353 | static void smbb_set_line_flag(struct smbb_charger *chg, int irq, int flag) |
354 | { |
355 | bool state; |
356 | int ret; |
357 | |
358 | ret = irq_get_irqchip_state(irq, which: IRQCHIP_STATE_LINE_LEVEL, state: &state); |
359 | if (ret < 0) { |
360 | dev_err(chg->dev, "failed to read irq line\n" ); |
361 | return; |
362 | } |
363 | |
364 | mutex_lock(&chg->statlock); |
365 | if (state) |
366 | chg->status |= flag; |
367 | else |
368 | chg->status &= ~flag; |
369 | mutex_unlock(lock: &chg->statlock); |
370 | |
371 | dev_dbg(chg->dev, "status = %03lx\n" , chg->status); |
372 | } |
373 | |
374 | static irqreturn_t smbb_usb_valid_handler(int irq, void *_data) |
375 | { |
376 | struct smbb_charger *chg = _data; |
377 | |
378 | smbb_set_line_flag(chg, irq, STATUS_USBIN_VALID); |
379 | extcon_set_state_sync(edev: chg->edev, EXTCON_USB, |
380 | state: chg->status & STATUS_USBIN_VALID); |
381 | power_supply_changed(psy: chg->usb_psy); |
382 | |
383 | return IRQ_HANDLED; |
384 | } |
385 | |
386 | static irqreturn_t smbb_dc_valid_handler(int irq, void *_data) |
387 | { |
388 | struct smbb_charger *chg = _data; |
389 | |
390 | smbb_set_line_flag(chg, irq, STATUS_DCIN_VALID); |
391 | if (!chg->dc_disabled) |
392 | power_supply_changed(psy: chg->dc_psy); |
393 | |
394 | return IRQ_HANDLED; |
395 | } |
396 | |
397 | static irqreturn_t smbb_bat_temp_handler(int irq, void *_data) |
398 | { |
399 | struct smbb_charger *chg = _data; |
400 | unsigned int val; |
401 | int rc; |
402 | |
403 | rc = regmap_read(map: chg->regmap, reg: chg->addr + SMBB_BAT_TEMP_STATUS, val: &val); |
404 | if (rc) |
405 | return IRQ_HANDLED; |
406 | |
407 | mutex_lock(&chg->statlock); |
408 | if (val & TEMP_STATUS_OK) { |
409 | chg->status |= STATUS_BAT_OK; |
410 | } else { |
411 | chg->status &= ~STATUS_BAT_OK; |
412 | if (val & TEMP_STATUS_HOT) |
413 | chg->status |= STATUS_BAT_HOT; |
414 | } |
415 | mutex_unlock(lock: &chg->statlock); |
416 | |
417 | power_supply_changed(psy: chg->bat_psy); |
418 | return IRQ_HANDLED; |
419 | } |
420 | |
421 | static irqreturn_t smbb_bat_present_handler(int irq, void *_data) |
422 | { |
423 | struct smbb_charger *chg = _data; |
424 | |
425 | smbb_set_line_flag(chg, irq, STATUS_BAT_PRESENT); |
426 | power_supply_changed(psy: chg->bat_psy); |
427 | |
428 | return IRQ_HANDLED; |
429 | } |
430 | |
431 | static irqreturn_t smbb_chg_done_handler(int irq, void *_data) |
432 | { |
433 | struct smbb_charger *chg = _data; |
434 | |
435 | smbb_set_line_flag(chg, irq, STATUS_CHG_DONE); |
436 | power_supply_changed(psy: chg->bat_psy); |
437 | |
438 | return IRQ_HANDLED; |
439 | } |
440 | |
441 | static irqreturn_t smbb_chg_gone_handler(int irq, void *_data) |
442 | { |
443 | struct smbb_charger *chg = _data; |
444 | |
445 | smbb_set_line_flag(chg, irq, STATUS_CHG_GONE); |
446 | power_supply_changed(psy: chg->bat_psy); |
447 | power_supply_changed(psy: chg->usb_psy); |
448 | if (!chg->dc_disabled) |
449 | power_supply_changed(psy: chg->dc_psy); |
450 | |
451 | return IRQ_HANDLED; |
452 | } |
453 | |
454 | static irqreturn_t smbb_chg_fast_handler(int irq, void *_data) |
455 | { |
456 | struct smbb_charger *chg = _data; |
457 | |
458 | smbb_set_line_flag(chg, irq, STATUS_CHG_FAST); |
459 | power_supply_changed(psy: chg->bat_psy); |
460 | |
461 | return IRQ_HANDLED; |
462 | } |
463 | |
464 | static irqreturn_t smbb_chg_trkl_handler(int irq, void *_data) |
465 | { |
466 | struct smbb_charger *chg = _data; |
467 | |
468 | smbb_set_line_flag(chg, irq, STATUS_CHG_TRKL); |
469 | power_supply_changed(psy: chg->bat_psy); |
470 | |
471 | return IRQ_HANDLED; |
472 | } |
473 | |
474 | static const struct smbb_irq { |
475 | const char *name; |
476 | irqreturn_t (*handler)(int, void *); |
477 | } smbb_charger_irqs[] = { |
478 | { "chg-done" , smbb_chg_done_handler }, |
479 | { "chg-fast" , smbb_chg_fast_handler }, |
480 | { "chg-trkl" , smbb_chg_trkl_handler }, |
481 | { "bat-temp-ok" , smbb_bat_temp_handler }, |
482 | { "bat-present" , smbb_bat_present_handler }, |
483 | { "chg-gone" , smbb_chg_gone_handler }, |
484 | { "usb-valid" , smbb_usb_valid_handler }, |
485 | { "dc-valid" , smbb_dc_valid_handler }, |
486 | }; |
487 | |
488 | static int smbb_usbin_get_property(struct power_supply *psy, |
489 | enum power_supply_property psp, |
490 | union power_supply_propval *val) |
491 | { |
492 | struct smbb_charger *chg = power_supply_get_drvdata(psy); |
493 | int rc = 0; |
494 | |
495 | switch (psp) { |
496 | case POWER_SUPPLY_PROP_ONLINE: |
497 | mutex_lock(&chg->statlock); |
498 | val->intval = !(chg->status & STATUS_CHG_GONE) && |
499 | (chg->status & STATUS_USBIN_VALID); |
500 | mutex_unlock(lock: &chg->statlock); |
501 | break; |
502 | case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: |
503 | val->intval = chg->attr[ATTR_USBIN_IMAX]; |
504 | break; |
505 | case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX: |
506 | val->intval = 2500000; |
507 | break; |
508 | default: |
509 | rc = -EINVAL; |
510 | break; |
511 | } |
512 | |
513 | return rc; |
514 | } |
515 | |
516 | static int smbb_usbin_set_property(struct power_supply *psy, |
517 | enum power_supply_property psp, |
518 | const union power_supply_propval *val) |
519 | { |
520 | struct smbb_charger *chg = power_supply_get_drvdata(psy); |
521 | int rc; |
522 | |
523 | switch (psp) { |
524 | case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: |
525 | rc = smbb_charger_attr_write(chg, which: ATTR_USBIN_IMAX, |
526 | val: val->intval); |
527 | break; |
528 | default: |
529 | rc = -EINVAL; |
530 | break; |
531 | } |
532 | |
533 | return rc; |
534 | } |
535 | |
536 | static int smbb_dcin_get_property(struct power_supply *psy, |
537 | enum power_supply_property psp, |
538 | union power_supply_propval *val) |
539 | { |
540 | struct smbb_charger *chg = power_supply_get_drvdata(psy); |
541 | int rc = 0; |
542 | |
543 | switch (psp) { |
544 | case POWER_SUPPLY_PROP_ONLINE: |
545 | mutex_lock(&chg->statlock); |
546 | val->intval = !(chg->status & STATUS_CHG_GONE) && |
547 | (chg->status & STATUS_DCIN_VALID); |
548 | mutex_unlock(lock: &chg->statlock); |
549 | break; |
550 | case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: |
551 | val->intval = chg->attr[ATTR_DCIN_IMAX]; |
552 | break; |
553 | case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX: |
554 | val->intval = 2500000; |
555 | break; |
556 | default: |
557 | rc = -EINVAL; |
558 | break; |
559 | } |
560 | |
561 | return rc; |
562 | } |
563 | |
564 | static int smbb_dcin_set_property(struct power_supply *psy, |
565 | enum power_supply_property psp, |
566 | const union power_supply_propval *val) |
567 | { |
568 | struct smbb_charger *chg = power_supply_get_drvdata(psy); |
569 | int rc; |
570 | |
571 | switch (psp) { |
572 | case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: |
573 | rc = smbb_charger_attr_write(chg, which: ATTR_DCIN_IMAX, |
574 | val: val->intval); |
575 | break; |
576 | default: |
577 | rc = -EINVAL; |
578 | break; |
579 | } |
580 | |
581 | return rc; |
582 | } |
583 | |
584 | static int smbb_charger_writable_property(struct power_supply *psy, |
585 | enum power_supply_property psp) |
586 | { |
587 | return psp == POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT; |
588 | } |
589 | |
590 | static int smbb_battery_get_property(struct power_supply *psy, |
591 | enum power_supply_property psp, |
592 | union power_supply_propval *val) |
593 | { |
594 | struct smbb_charger *chg = power_supply_get_drvdata(psy); |
595 | unsigned long status; |
596 | int rc = 0; |
597 | |
598 | mutex_lock(&chg->statlock); |
599 | status = chg->status; |
600 | mutex_unlock(lock: &chg->statlock); |
601 | |
602 | switch (psp) { |
603 | case POWER_SUPPLY_PROP_STATUS: |
604 | if (status & STATUS_CHG_GONE) |
605 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
606 | else if (!(status & (STATUS_DCIN_VALID | STATUS_USBIN_VALID))) |
607 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
608 | else if (status & STATUS_CHG_DONE) |
609 | val->intval = POWER_SUPPLY_STATUS_FULL; |
610 | else if (!(status & STATUS_BAT_OK)) |
611 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
612 | else if (status & (STATUS_CHG_FAST | STATUS_CHG_TRKL)) |
613 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
614 | else /* everything is ok for charging, but we are not... */ |
615 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
616 | break; |
617 | case POWER_SUPPLY_PROP_HEALTH: |
618 | if (status & STATUS_BAT_OK) |
619 | val->intval = POWER_SUPPLY_HEALTH_GOOD; |
620 | else if (status & STATUS_BAT_HOT) |
621 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; |
622 | else |
623 | val->intval = POWER_SUPPLY_HEALTH_COLD; |
624 | break; |
625 | case POWER_SUPPLY_PROP_CHARGE_TYPE: |
626 | if (status & STATUS_CHG_FAST) |
627 | val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; |
628 | else if (status & STATUS_CHG_TRKL) |
629 | val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; |
630 | else |
631 | val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; |
632 | break; |
633 | case POWER_SUPPLY_PROP_PRESENT: |
634 | val->intval = !!(status & STATUS_BAT_PRESENT); |
635 | break; |
636 | case POWER_SUPPLY_PROP_CURRENT_MAX: |
637 | val->intval = chg->attr[ATTR_BAT_IMAX]; |
638 | break; |
639 | case POWER_SUPPLY_PROP_VOLTAGE_MAX: |
640 | val->intval = chg->attr[ATTR_BAT_VMAX]; |
641 | break; |
642 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
643 | /* this charger is a single-cell lithium-ion battery charger |
644 | * only. If you hook up some other technology, there will be |
645 | * fireworks. |
646 | */ |
647 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; |
648 | break; |
649 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
650 | val->intval = 3000000; /* single-cell li-ion low end */ |
651 | break; |
652 | default: |
653 | rc = -EINVAL; |
654 | break; |
655 | } |
656 | |
657 | return rc; |
658 | } |
659 | |
660 | static int smbb_battery_set_property(struct power_supply *psy, |
661 | enum power_supply_property psp, |
662 | const union power_supply_propval *val) |
663 | { |
664 | struct smbb_charger *chg = power_supply_get_drvdata(psy); |
665 | int rc; |
666 | |
667 | switch (psp) { |
668 | case POWER_SUPPLY_PROP_CURRENT_MAX: |
669 | rc = smbb_charger_attr_write(chg, which: ATTR_BAT_IMAX, val: val->intval); |
670 | break; |
671 | case POWER_SUPPLY_PROP_VOLTAGE_MAX: |
672 | rc = smbb_charger_attr_write(chg, which: ATTR_BAT_VMAX, val: val->intval); |
673 | break; |
674 | default: |
675 | rc = -EINVAL; |
676 | break; |
677 | } |
678 | |
679 | return rc; |
680 | } |
681 | |
682 | static int smbb_battery_writable_property(struct power_supply *psy, |
683 | enum power_supply_property psp) |
684 | { |
685 | switch (psp) { |
686 | case POWER_SUPPLY_PROP_CURRENT_MAX: |
687 | case POWER_SUPPLY_PROP_VOLTAGE_MAX: |
688 | return 1; |
689 | default: |
690 | return 0; |
691 | } |
692 | } |
693 | |
694 | static enum power_supply_property smbb_charger_properties[] = { |
695 | POWER_SUPPLY_PROP_ONLINE, |
696 | POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, |
697 | POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX, |
698 | }; |
699 | |
700 | static enum power_supply_property smbb_battery_properties[] = { |
701 | POWER_SUPPLY_PROP_STATUS, |
702 | POWER_SUPPLY_PROP_HEALTH, |
703 | POWER_SUPPLY_PROP_PRESENT, |
704 | POWER_SUPPLY_PROP_CHARGE_TYPE, |
705 | POWER_SUPPLY_PROP_CURRENT_MAX, |
706 | POWER_SUPPLY_PROP_VOLTAGE_MAX, |
707 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
708 | POWER_SUPPLY_PROP_TECHNOLOGY, |
709 | }; |
710 | |
711 | static const struct reg_off_mask_default { |
712 | unsigned int offset; |
713 | unsigned int mask; |
714 | unsigned int value; |
715 | unsigned int rev_mask; |
716 | } smbb_charger_setup[] = { |
717 | /* The bootloader is supposed to set this... make sure anyway. */ |
718 | { SMBB_MISC_BOOT_DONE, BOOT_DONE, BOOT_DONE }, |
719 | |
720 | /* Disable software timer */ |
721 | { SMBB_CHG_TCHG_MAX_EN, TCHG_MAX_EN, 0 }, |
722 | |
723 | /* Clear and disable watchdog */ |
724 | { SMBB_CHG_WDOG_TIME, 0xff, 160 }, |
725 | { SMBB_CHG_WDOG_EN, WDOG_EN, 0 }, |
726 | |
727 | /* Use charger based EoC detection */ |
728 | { SMBB_CHG_IBAT_TERM_CHG, IBAT_TERM_CHG_IEOC, IBAT_TERM_CHG_IEOC_CHG }, |
729 | |
730 | /* Disable GSM PA load adjustment. |
731 | * The PA signal is incorrectly connected on v2. |
732 | */ |
733 | { SMBB_CHG_CFG, 0xff, 0x00, BIT(3) }, |
734 | |
735 | /* Use VBAT (not VSYS) to compensate for IR drop during fast charging */ |
736 | { SMBB_BUCK_REG_MODE, BUCK_REG_MODE, BUCK_REG_MODE_VBAT }, |
737 | |
738 | /* Enable battery temperature comparators */ |
739 | { SMBB_BAT_BTC_CTRL, BTC_CTRL_COMP_EN, BTC_CTRL_COMP_EN }, |
740 | |
741 | /* Stop USB enumeration timer */ |
742 | { SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP }, |
743 | |
744 | #if 0 /* FIXME supposedly only to disable hardware ARB termination */ |
745 | { SMBB_USB_SEC_ACCESS, SEC_ACCESS_MAGIC }, |
746 | { SMBB_USB_REV_BST, 0xff, REV_BST_CHG_GONE }, |
747 | #endif |
748 | |
749 | /* Stop USB enumeration timer, again */ |
750 | { SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP }, |
751 | |
752 | /* Enable charging */ |
753 | { SMBB_CHG_CTRL, CTRL_EN, CTRL_EN }, |
754 | }; |
755 | |
756 | static char *smbb_bif[] = { "smbb-bif" }; |
757 | |
758 | static const struct power_supply_desc bat_psy_desc = { |
759 | .name = "smbb-bif" , |
760 | .type = POWER_SUPPLY_TYPE_BATTERY, |
761 | .properties = smbb_battery_properties, |
762 | .num_properties = ARRAY_SIZE(smbb_battery_properties), |
763 | .get_property = smbb_battery_get_property, |
764 | .set_property = smbb_battery_set_property, |
765 | .property_is_writeable = smbb_battery_writable_property, |
766 | }; |
767 | |
768 | static const struct power_supply_desc usb_psy_desc = { |
769 | .name = "smbb-usbin" , |
770 | .type = POWER_SUPPLY_TYPE_USB, |
771 | .properties = smbb_charger_properties, |
772 | .num_properties = ARRAY_SIZE(smbb_charger_properties), |
773 | .get_property = smbb_usbin_get_property, |
774 | .set_property = smbb_usbin_set_property, |
775 | .property_is_writeable = smbb_charger_writable_property, |
776 | }; |
777 | |
778 | static const struct power_supply_desc dc_psy_desc = { |
779 | .name = "smbb-dcin" , |
780 | .type = POWER_SUPPLY_TYPE_MAINS, |
781 | .properties = smbb_charger_properties, |
782 | .num_properties = ARRAY_SIZE(smbb_charger_properties), |
783 | .get_property = smbb_dcin_get_property, |
784 | .set_property = smbb_dcin_set_property, |
785 | .property_is_writeable = smbb_charger_writable_property, |
786 | }; |
787 | |
788 | static int smbb_chg_otg_enable(struct regulator_dev *rdev) |
789 | { |
790 | struct smbb_charger *chg = rdev_get_drvdata(rdev); |
791 | int rc; |
792 | |
793 | rc = regmap_update_bits(map: chg->regmap, reg: chg->addr + SMBB_USB_OTG_CTL, |
794 | OTG_CTL_EN, OTG_CTL_EN); |
795 | if (rc) |
796 | dev_err(chg->dev, "failed to update OTG_CTL\n" ); |
797 | return rc; |
798 | } |
799 | |
800 | static int smbb_chg_otg_disable(struct regulator_dev *rdev) |
801 | { |
802 | struct smbb_charger *chg = rdev_get_drvdata(rdev); |
803 | int rc; |
804 | |
805 | rc = regmap_update_bits(map: chg->regmap, reg: chg->addr + SMBB_USB_OTG_CTL, |
806 | OTG_CTL_EN, val: 0); |
807 | if (rc) |
808 | dev_err(chg->dev, "failed to update OTG_CTL\n" ); |
809 | return rc; |
810 | } |
811 | |
812 | static int smbb_chg_otg_is_enabled(struct regulator_dev *rdev) |
813 | { |
814 | struct smbb_charger *chg = rdev_get_drvdata(rdev); |
815 | unsigned int value = 0; |
816 | int rc; |
817 | |
818 | rc = regmap_read(map: chg->regmap, reg: chg->addr + SMBB_USB_OTG_CTL, val: &value); |
819 | if (rc) |
820 | dev_err(chg->dev, "failed to read OTG_CTL\n" ); |
821 | |
822 | return !!(value & OTG_CTL_EN); |
823 | } |
824 | |
825 | static const struct regulator_ops smbb_chg_otg_ops = { |
826 | .enable = smbb_chg_otg_enable, |
827 | .disable = smbb_chg_otg_disable, |
828 | .is_enabled = smbb_chg_otg_is_enabled, |
829 | }; |
830 | |
831 | static int smbb_charger_probe(struct platform_device *pdev) |
832 | { |
833 | struct power_supply_config bat_cfg = {}; |
834 | struct power_supply_config usb_cfg = {}; |
835 | struct power_supply_config dc_cfg = {}; |
836 | struct smbb_charger *chg; |
837 | struct regulator_config config = { }; |
838 | int rc, i; |
839 | |
840 | chg = devm_kzalloc(dev: &pdev->dev, size: sizeof(*chg), GFP_KERNEL); |
841 | if (!chg) |
842 | return -ENOMEM; |
843 | |
844 | chg->dev = &pdev->dev; |
845 | mutex_init(&chg->statlock); |
846 | |
847 | chg->regmap = dev_get_regmap(dev: pdev->dev.parent, NULL); |
848 | if (!chg->regmap) { |
849 | dev_err(&pdev->dev, "failed to locate regmap\n" ); |
850 | return -ENODEV; |
851 | } |
852 | |
853 | rc = of_property_read_u32(np: pdev->dev.of_node, propname: "reg" , out_value: &chg->addr); |
854 | if (rc) { |
855 | dev_err(&pdev->dev, "missing or invalid 'reg' property\n" ); |
856 | return rc; |
857 | } |
858 | |
859 | rc = regmap_read(map: chg->regmap, reg: chg->addr + SMBB_MISC_REV2, val: &chg->revision); |
860 | if (rc) { |
861 | dev_err(&pdev->dev, "unable to read revision\n" ); |
862 | return rc; |
863 | } |
864 | |
865 | chg->revision += 1; |
866 | if (chg->revision != 1 && chg->revision != 2 && chg->revision != 3) { |
867 | dev_err(&pdev->dev, "v%d hardware not supported\n" , chg->revision); |
868 | return -ENODEV; |
869 | } |
870 | dev_info(&pdev->dev, "Initializing SMBB rev %u" , chg->revision); |
871 | |
872 | chg->dc_disabled = of_property_read_bool(np: pdev->dev.of_node, propname: "qcom,disable-dc" ); |
873 | |
874 | for (i = 0; i < _ATTR_CNT; ++i) { |
875 | rc = smbb_charger_attr_parse(chg, which: i); |
876 | if (rc) { |
877 | dev_err(&pdev->dev, "failed to parse/apply settings\n" ); |
878 | return rc; |
879 | } |
880 | } |
881 | |
882 | bat_cfg.drv_data = chg; |
883 | bat_cfg.of_node = pdev->dev.of_node; |
884 | chg->bat_psy = devm_power_supply_register(parent: &pdev->dev, |
885 | desc: &bat_psy_desc, |
886 | cfg: &bat_cfg); |
887 | if (IS_ERR(ptr: chg->bat_psy)) { |
888 | dev_err(&pdev->dev, "failed to register battery\n" ); |
889 | return PTR_ERR(ptr: chg->bat_psy); |
890 | } |
891 | |
892 | usb_cfg.drv_data = chg; |
893 | usb_cfg.supplied_to = smbb_bif; |
894 | usb_cfg.num_supplicants = ARRAY_SIZE(smbb_bif); |
895 | chg->usb_psy = devm_power_supply_register(parent: &pdev->dev, |
896 | desc: &usb_psy_desc, |
897 | cfg: &usb_cfg); |
898 | if (IS_ERR(ptr: chg->usb_psy)) { |
899 | dev_err(&pdev->dev, "failed to register USB power supply\n" ); |
900 | return PTR_ERR(ptr: chg->usb_psy); |
901 | } |
902 | |
903 | chg->edev = devm_extcon_dev_allocate(dev: &pdev->dev, cable: smbb_usb_extcon_cable); |
904 | if (IS_ERR(ptr: chg->edev)) { |
905 | dev_err(&pdev->dev, "failed to allocate extcon device\n" ); |
906 | return -ENOMEM; |
907 | } |
908 | |
909 | rc = devm_extcon_dev_register(dev: &pdev->dev, edev: chg->edev); |
910 | if (rc < 0) { |
911 | dev_err(&pdev->dev, "failed to register extcon device\n" ); |
912 | return rc; |
913 | } |
914 | |
915 | if (!chg->dc_disabled) { |
916 | dc_cfg.drv_data = chg; |
917 | dc_cfg.supplied_to = smbb_bif; |
918 | dc_cfg.num_supplicants = ARRAY_SIZE(smbb_bif); |
919 | chg->dc_psy = devm_power_supply_register(parent: &pdev->dev, |
920 | desc: &dc_psy_desc, |
921 | cfg: &dc_cfg); |
922 | if (IS_ERR(ptr: chg->dc_psy)) { |
923 | dev_err(&pdev->dev, "failed to register DC power supply\n" ); |
924 | return PTR_ERR(ptr: chg->dc_psy); |
925 | } |
926 | } |
927 | |
928 | for (i = 0; i < ARRAY_SIZE(smbb_charger_irqs); ++i) { |
929 | int irq; |
930 | |
931 | irq = platform_get_irq_byname(pdev, smbb_charger_irqs[i].name); |
932 | if (irq < 0) |
933 | return irq; |
934 | |
935 | smbb_charger_irqs[i].handler(irq, chg); |
936 | |
937 | rc = devm_request_threaded_irq(dev: &pdev->dev, irq, NULL, |
938 | thread_fn: smbb_charger_irqs[i].handler, IRQF_ONESHOT, |
939 | devname: smbb_charger_irqs[i].name, dev_id: chg); |
940 | if (rc) { |
941 | dev_err(&pdev->dev, "failed to request irq '%s'\n" , |
942 | smbb_charger_irqs[i].name); |
943 | return rc; |
944 | } |
945 | } |
946 | |
947 | /* |
948 | * otg regulator is used to control VBUS voltage direction |
949 | * when USB switches between host and gadget mode |
950 | */ |
951 | chg->otg_rdesc.id = -1; |
952 | chg->otg_rdesc.name = "otg-vbus" ; |
953 | chg->otg_rdesc.ops = &smbb_chg_otg_ops; |
954 | chg->otg_rdesc.owner = THIS_MODULE; |
955 | chg->otg_rdesc.type = REGULATOR_VOLTAGE; |
956 | chg->otg_rdesc.supply_name = "usb-otg-in" ; |
957 | chg->otg_rdesc.of_match = "otg-vbus" ; |
958 | |
959 | config.dev = &pdev->dev; |
960 | config.driver_data = chg; |
961 | |
962 | chg->otg_reg = devm_regulator_register(dev: &pdev->dev, regulator_desc: &chg->otg_rdesc, |
963 | config: &config); |
964 | if (IS_ERR(ptr: chg->otg_reg)) |
965 | return PTR_ERR(ptr: chg->otg_reg); |
966 | |
967 | chg->jeita_ext_temp = of_property_read_bool(np: pdev->dev.of_node, |
968 | propname: "qcom,jeita-extended-temp-range" ); |
969 | |
970 | /* Set temperature range to [35%:70%] or [25%:80%] accordingly */ |
971 | rc = regmap_update_bits(map: chg->regmap, reg: chg->addr + SMBB_BAT_BTC_CTRL, |
972 | BTC_CTRL_COLD_EXT | BTC_CTRL_HOT_EXT_N, |
973 | val: chg->jeita_ext_temp ? |
974 | BTC_CTRL_COLD_EXT : |
975 | BTC_CTRL_HOT_EXT_N); |
976 | if (rc) { |
977 | dev_err(&pdev->dev, |
978 | "unable to set %s temperature range\n" , |
979 | chg->jeita_ext_temp ? "JEITA extended" : "normal" ); |
980 | return rc; |
981 | } |
982 | |
983 | for (i = 0; i < ARRAY_SIZE(smbb_charger_setup); ++i) { |
984 | const struct reg_off_mask_default *r = &smbb_charger_setup[i]; |
985 | |
986 | if (r->rev_mask & BIT(chg->revision)) |
987 | continue; |
988 | |
989 | rc = regmap_update_bits(map: chg->regmap, reg: chg->addr + r->offset, |
990 | mask: r->mask, val: r->value); |
991 | if (rc) { |
992 | dev_err(&pdev->dev, |
993 | "unable to initializing charging, bailing\n" ); |
994 | return rc; |
995 | } |
996 | } |
997 | |
998 | platform_set_drvdata(pdev, data: chg); |
999 | |
1000 | return 0; |
1001 | } |
1002 | |
1003 | static void smbb_charger_remove(struct platform_device *pdev) |
1004 | { |
1005 | struct smbb_charger *chg; |
1006 | |
1007 | chg = platform_get_drvdata(pdev); |
1008 | |
1009 | regmap_update_bits(map: chg->regmap, reg: chg->addr + SMBB_CHG_CTRL, CTRL_EN, val: 0); |
1010 | } |
1011 | |
1012 | static const struct of_device_id smbb_charger_id_table[] = { |
1013 | { .compatible = "qcom,pm8226-charger" }, |
1014 | { .compatible = "qcom,pm8941-charger" }, |
1015 | { } |
1016 | }; |
1017 | MODULE_DEVICE_TABLE(of, smbb_charger_id_table); |
1018 | |
1019 | static struct platform_driver smbb_charger_driver = { |
1020 | .probe = smbb_charger_probe, |
1021 | .remove_new = smbb_charger_remove, |
1022 | .driver = { |
1023 | .name = "qcom-smbb" , |
1024 | .of_match_table = smbb_charger_id_table, |
1025 | }, |
1026 | }; |
1027 | module_platform_driver(smbb_charger_driver); |
1028 | |
1029 | MODULE_DESCRIPTION("Qualcomm Switch-Mode Battery Charger and Boost driver" ); |
1030 | MODULE_LICENSE("GPL v2" ); |
1031 | |