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962e56bf 1/*
4706a525 2 * extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC
962e56bf 3 *
4706a525 4 * Copyright (C) 2013,2014 Samsung Electrnoics
962e56bf 5 * Chanwoo Choi <cw00.choi@samsung.com>
4706a525 6 * Krzysztof Kozlowski <k.kozlowski@samsung.com>
962e56bf
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7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18
19#include <linux/kernel.h>
20#include <linux/module.h>
21#include <linux/i2c.h>
22#include <linux/interrupt.h>
23#include <linux/platform_device.h>
24#include <linux/mfd/max14577.h>
25#include <linux/mfd/max14577-private.h>
26#include <linux/extcon.h>
27
962e56bf
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28#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */
29
30enum max14577_muic_adc_debounce_time {
31 ADC_DEBOUNCE_TIME_5MS = 0,
32 ADC_DEBOUNCE_TIME_10MS,
33 ADC_DEBOUNCE_TIME_25MS,
34 ADC_DEBOUNCE_TIME_38_62MS,
35};
36
37enum max14577_muic_status {
38 MAX14577_MUIC_STATUS1 = 0,
39 MAX14577_MUIC_STATUS2 = 1,
40 MAX14577_MUIC_STATUS_END,
41};
42
0ca852b7
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43/**
44 * struct max14577_muic_irq
45 * @irq: the index of irq list of MUIC device.
46 * @name: the name of irq.
47 * @virq: the virtual irq to use irq domain
48 */
49struct max14577_muic_irq {
50 unsigned int irq;
51 const char *name;
52 unsigned int virq;
53};
54
55static struct max14577_muic_irq max14577_muic_irqs[] = {
56 { MAX14577_IRQ_INT1_ADC, "muic-ADC" },
57 { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" },
58 { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" },
59 { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
60 { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" },
61 { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
62 { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" },
63 { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
64};
65
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66static struct max14577_muic_irq max77836_muic_irqs[] = {
67 { MAX14577_IRQ_INT1_ADC, "muic-ADC" },
68 { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" },
69 { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" },
70 { MAX77836_IRQ_INT1_ADC1K, "muic-ADC1K" },
71 { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
72 { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" },
73 { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
74 { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" },
75 { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
76 { MAX77836_IRQ_INT2_VIDRM, "muic-VIDRM" },
77};
78
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79struct max14577_muic_info {
80 struct device *dev;
81 struct max14577 *max14577;
82 struct extcon_dev *edev;
83 int prev_cable_type;
84 int prev_chg_type;
85 u8 status[MAX14577_MUIC_STATUS_END];
86
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87 struct max14577_muic_irq *muic_irqs;
88 unsigned int muic_irqs_num;
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89 bool irq_adc;
90 bool irq_chg;
91 struct work_struct irq_work;
92 struct mutex mutex;
93
94 /*
95 * Use delayed workqueue to detect cable state and then
96 * notify cable state to notifiee/platform through uevent.
97 * After completing the booting of platform, the extcon provider
98 * driver should notify cable state to upper layer.
99 */
100 struct delayed_work wq_detcable;
101
102 /*
103 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
104 * h/w path of COMP2/COMN1 on CONTROL1 register.
105 */
106 int path_usb;
107 int path_uart;
108};
109
110enum max14577_muic_cable_group {
111 MAX14577_CABLE_GROUP_ADC = 0,
112 MAX14577_CABLE_GROUP_CHG,
113};
114
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115/* Define supported accessory type */
116enum max14577_muic_acc_type {
117 MAX14577_MUIC_ADC_GROUND = 0x0,
118 MAX14577_MUIC_ADC_SEND_END_BUTTON,
119 MAX14577_MUIC_ADC_REMOTE_S1_BUTTON,
120 MAX14577_MUIC_ADC_REMOTE_S2_BUTTON,
121 MAX14577_MUIC_ADC_REMOTE_S3_BUTTON,
122 MAX14577_MUIC_ADC_REMOTE_S4_BUTTON,
123 MAX14577_MUIC_ADC_REMOTE_S5_BUTTON,
124 MAX14577_MUIC_ADC_REMOTE_S6_BUTTON,
125 MAX14577_MUIC_ADC_REMOTE_S7_BUTTON,
126 MAX14577_MUIC_ADC_REMOTE_S8_BUTTON,
127 MAX14577_MUIC_ADC_REMOTE_S9_BUTTON,
128 MAX14577_MUIC_ADC_REMOTE_S10_BUTTON,
129 MAX14577_MUIC_ADC_REMOTE_S11_BUTTON,
130 MAX14577_MUIC_ADC_REMOTE_S12_BUTTON,
131 MAX14577_MUIC_ADC_RESERVED_ACC_1,
132 MAX14577_MUIC_ADC_RESERVED_ACC_2,
133 MAX14577_MUIC_ADC_RESERVED_ACC_3,
134 MAX14577_MUIC_ADC_RESERVED_ACC_4,
135 MAX14577_MUIC_ADC_RESERVED_ACC_5,
136 MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2,
137 MAX14577_MUIC_ADC_PHONE_POWERED_DEV,
138 MAX14577_MUIC_ADC_TTY_CONVERTER,
139 MAX14577_MUIC_ADC_UART_CABLE,
140 MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG,
141 MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF,
142 MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON,
143 MAX14577_MUIC_ADC_AV_CABLE_NOLOAD,
144 MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG,
145 MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF,
146 MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON,
147 MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */
148 MAX14577_MUIC_ADC_OPEN,
149};
150
151/* max14577 MUIC device support below list of accessories(external connector) */
152enum {
153 EXTCON_CABLE_USB = 0,
154 EXTCON_CABLE_TA,
155 EXTCON_CABLE_FAST_CHARGER,
156 EXTCON_CABLE_SLOW_CHARGER,
157 EXTCON_CABLE_CHARGE_DOWNSTREAM,
158 EXTCON_CABLE_JIG_USB_ON,
159 EXTCON_CABLE_JIG_USB_OFF,
160 EXTCON_CABLE_JIG_UART_OFF,
161 EXTCON_CABLE_JIG_UART_ON,
162
163 _EXTCON_CABLE_NUM,
164};
165
166static const char *max14577_extcon_cable[] = {
167 [EXTCON_CABLE_USB] = "USB",
168 [EXTCON_CABLE_TA] = "TA",
169 [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger",
170 [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger",
171 [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream",
172 [EXTCON_CABLE_JIG_USB_ON] = "JIG-USB-ON",
173 [EXTCON_CABLE_JIG_USB_OFF] = "JIG-USB-OFF",
174 [EXTCON_CABLE_JIG_UART_OFF] = "JIG-UART-OFF",
175 [EXTCON_CABLE_JIG_UART_ON] = "JIG-UART-ON",
176
177 NULL,
178};
179
180/*
181 * max14577_muic_set_debounce_time - Set the debounce time of ADC
182 * @info: the instance including private data of max14577 MUIC
183 * @time: the debounce time of ADC
184 */
185static int max14577_muic_set_debounce_time(struct max14577_muic_info *info,
186 enum max14577_muic_adc_debounce_time time)
187{
188 u8 ret;
189
190 switch (time) {
191 case ADC_DEBOUNCE_TIME_5MS:
192 case ADC_DEBOUNCE_TIME_10MS:
193 case ADC_DEBOUNCE_TIME_25MS:
194 case ADC_DEBOUNCE_TIME_38_62MS:
195 ret = max14577_update_reg(info->max14577->regmap,
196 MAX14577_MUIC_REG_CONTROL3,
197 CTRL3_ADCDBSET_MASK,
198 time << CTRL3_ADCDBSET_SHIFT);
199 if (ret) {
200 dev_err(info->dev, "failed to set ADC debounce time\n");
201 return ret;
202 }
203 break;
204 default:
205 dev_err(info->dev, "invalid ADC debounce time\n");
206 return -EINVAL;
207 }
208
209 return 0;
210};
211
212/*
213 * max14577_muic_set_path - Set hardware line according to attached cable
214 * @info: the instance including private data of max14577 MUIC
215 * @value: the path according to attached cable
216 * @attached: the state of cable (true:attached, false:detached)
217 *
218 * The max14577 MUIC device share outside H/W line among a varity of cables
219 * so, this function set internal path of H/W line according to the type of
220 * attached cable.
221 */
222static int max14577_muic_set_path(struct max14577_muic_info *info,
223 u8 val, bool attached)
224{
225 int ret = 0;
226 u8 ctrl1, ctrl2 = 0;
227
228 /* Set open state to path before changing hw path */
229 ret = max14577_update_reg(info->max14577->regmap,
230 MAX14577_MUIC_REG_CONTROL1,
231 CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN);
232 if (ret < 0) {
233 dev_err(info->dev, "failed to update MUIC register\n");
234 return ret;
235 }
236
237 if (attached)
238 ctrl1 = val;
239 else
240 ctrl1 = CTRL1_SW_OPEN;
241
242 ret = max14577_update_reg(info->max14577->regmap,
243 MAX14577_MUIC_REG_CONTROL1,
244 CLEAR_IDBEN_MICEN_MASK, ctrl1);
245 if (ret < 0) {
246 dev_err(info->dev, "failed to update MUIC register\n");
247 return ret;
248 }
249
250 if (attached)
251 ctrl2 |= CTRL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
252 else
253 ctrl2 |= CTRL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
254
255 ret = max14577_update_reg(info->max14577->regmap,
256 MAX14577_REG_CONTROL2,
257 CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2);
258 if (ret < 0) {
259 dev_err(info->dev, "failed to update MUIC register\n");
260 return ret;
261 }
262
263 dev_dbg(info->dev,
264 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
265 ctrl1, ctrl2, attached ? "attached" : "detached");
266
267 return 0;
268}
269
270/*
271 * max14577_muic_get_cable_type - Return cable type and check cable state
272 * @info: the instance including private data of max14577 MUIC
273 * @group: the path according to attached cable
274 * @attached: store cable state and return
275 *
276 * This function check the cable state either attached or detached,
277 * and then divide precise type of cable according to cable group.
278 * - max14577_CABLE_GROUP_ADC
279 * - max14577_CABLE_GROUP_CHG
280 */
281static int max14577_muic_get_cable_type(struct max14577_muic_info *info,
282 enum max14577_muic_cable_group group, bool *attached)
283{
284 int cable_type = 0;
285 int adc;
286 int chg_type;
287
288 switch (group) {
289 case MAX14577_CABLE_GROUP_ADC:
290 /*
291 * Read ADC value to check cable type and decide cable state
292 * according to cable type
293 */
294 adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK;
295 adc >>= STATUS1_ADC_SHIFT;
296
297 /*
298 * Check current cable state/cable type and store cable type
299 * (info->prev_cable_type) for handling cable when cable is
300 * detached.
301 */
302 if (adc == MAX14577_MUIC_ADC_OPEN) {
303 *attached = false;
304
305 cable_type = info->prev_cable_type;
306 info->prev_cable_type = MAX14577_MUIC_ADC_OPEN;
307 } else {
308 *attached = true;
309
310 cable_type = info->prev_cable_type = adc;
311 }
312 break;
313 case MAX14577_CABLE_GROUP_CHG:
314 /*
315 * Read charger type to check cable type and decide cable state
316 * according to type of charger cable.
317 */
318 chg_type = info->status[MAX14577_MUIC_STATUS2] &
319 STATUS2_CHGTYP_MASK;
320 chg_type >>= STATUS2_CHGTYP_SHIFT;
321
322 if (chg_type == MAX14577_CHARGER_TYPE_NONE) {
323 *attached = false;
324
325 cable_type = info->prev_chg_type;
326 info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE;
327 } else {
328 *attached = true;
329
330 /*
331 * Check current cable state/cable type and store cable
332 * type(info->prev_chg_type) for handling cable when
333 * charger cable is detached.
334 */
335 cable_type = info->prev_chg_type = chg_type;
336 }
337
338 break;
339 default:
340 dev_err(info->dev, "Unknown cable group (%d)\n", group);
341 cable_type = -EINVAL;
342 break;
343 }
344
345 return cable_type;
346}
347
348static int max14577_muic_jig_handler(struct max14577_muic_info *info,
349 int cable_type, bool attached)
350{
351 char cable_name[32];
352 int ret = 0;
353 u8 path = CTRL1_SW_OPEN;
354
355 dev_dbg(info->dev,
356 "external connector is %s (adc:0x%02x)\n",
357 attached ? "attached" : "detached", cable_type);
358
359 switch (cable_type) {
360 case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */
361 /* PATH:AP_USB */
362 strcpy(cable_name, "JIG-USB-OFF");
363 path = CTRL1_SW_USB;
364 break;
365 case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
366 /* PATH:AP_USB */
367 strcpy(cable_name, "JIG-USB-ON");
368 path = CTRL1_SW_USB;
369 break;
370 case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
371 /* PATH:AP_UART */
372 strcpy(cable_name, "JIG-UART-OFF");
373 path = CTRL1_SW_UART;
374 break;
375 default:
376 dev_err(info->dev, "failed to detect %s jig cable\n",
377 attached ? "attached" : "detached");
378 return -EINVAL;
379 }
380
381 ret = max14577_muic_set_path(info, path, attached);
382 if (ret < 0)
383 return ret;
384
385 extcon_set_cable_state(info->edev, cable_name, attached);
386
387 return 0;
388}
389
390static int max14577_muic_adc_handler(struct max14577_muic_info *info)
391{
392 int cable_type;
393 bool attached;
394 int ret = 0;
395
396 /* Check accessory state which is either detached or attached */
397 cable_type = max14577_muic_get_cable_type(info,
398 MAX14577_CABLE_GROUP_ADC, &attached);
399
400 dev_dbg(info->dev,
401 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
402 attached ? "attached" : "detached", cable_type,
403 info->prev_cable_type);
404
405 switch (cable_type) {
406 case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF:
407 case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON:
408 case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF:
409 /* JIG */
410 ret = max14577_muic_jig_handler(info, cable_type, attached);
411 if (ret < 0)
412 return ret;
413 break;
414 case MAX14577_MUIC_ADC_GROUND:
415 case MAX14577_MUIC_ADC_SEND_END_BUTTON:
416 case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON:
417 case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON:
418 case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON:
419 case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON:
420 case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON:
421 case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON:
422 case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON:
423 case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON:
424 case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON:
425 case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON:
426 case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON:
427 case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON:
428 case MAX14577_MUIC_ADC_RESERVED_ACC_1:
429 case MAX14577_MUIC_ADC_RESERVED_ACC_2:
430 case MAX14577_MUIC_ADC_RESERVED_ACC_3:
431 case MAX14577_MUIC_ADC_RESERVED_ACC_4:
432 case MAX14577_MUIC_ADC_RESERVED_ACC_5:
433 case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2:
434 case MAX14577_MUIC_ADC_PHONE_POWERED_DEV:
435 case MAX14577_MUIC_ADC_TTY_CONVERTER:
436 case MAX14577_MUIC_ADC_UART_CABLE:
437 case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG:
438 case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD:
439 case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG:
440 case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON:
441 case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1:
442 /*
443 * This accessory isn't used in general case if it is specially
444 * needed to detect additional accessory, should implement
445 * proper operation when this accessory is attached/detached.
446 */
447 dev_info(info->dev,
448 "accessory is %s but it isn't used (adc:0x%x)\n",
449 attached ? "attached" : "detached", cable_type);
450 return -EAGAIN;
451 default:
452 dev_err(info->dev,
453 "failed to detect %s accessory (adc:0x%x)\n",
454 attached ? "attached" : "detached", cable_type);
455 return -EINVAL;
456 }
457
458 return 0;
459}
460
461static int max14577_muic_chg_handler(struct max14577_muic_info *info)
462{
463 int chg_type;
464 bool attached;
465 int ret = 0;
466
467 chg_type = max14577_muic_get_cable_type(info,
468 MAX14577_CABLE_GROUP_CHG, &attached);
469
470 dev_dbg(info->dev,
471 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
472 attached ? "attached" : "detached",
473 chg_type, info->prev_chg_type);
474
475 switch (chg_type) {
476 case MAX14577_CHARGER_TYPE_USB:
477 /* PATH:AP_USB */
478 ret = max14577_muic_set_path(info, info->path_usb, attached);
479 if (ret < 0)
480 return ret;
481
482 extcon_set_cable_state(info->edev, "USB", attached);
483 break;
484 case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
485 extcon_set_cable_state(info->edev, "TA", attached);
486 break;
487 case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
488 extcon_set_cable_state(info->edev,
489 "Charge-downstream", attached);
490 break;
491 case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
492 extcon_set_cable_state(info->edev, "Slow-charger", attached);
493 break;
494 case MAX14577_CHARGER_TYPE_SPECIAL_1A:
495 extcon_set_cable_state(info->edev, "Fast-charger", attached);
496 break;
497 case MAX14577_CHARGER_TYPE_NONE:
498 case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
499 break;
500 default:
501 dev_err(info->dev,
502 "failed to detect %s accessory (chg_type:0x%x)\n",
503 attached ? "attached" : "detached", chg_type);
504 return -EINVAL;
505 }
506
507 return 0;
508}
509
510static void max14577_muic_irq_work(struct work_struct *work)
511{
512 struct max14577_muic_info *info = container_of(work,
513 struct max14577_muic_info, irq_work);
514 int ret = 0;
515
516 if (!info->edev)
517 return;
518
519 mutex_lock(&info->mutex);
520
521 ret = max14577_bulk_read(info->max14577->regmap,
522 MAX14577_MUIC_REG_STATUS1, info->status, 2);
523 if (ret) {
524 dev_err(info->dev, "failed to read MUIC register\n");
525 mutex_unlock(&info->mutex);
526 return;
527 }
528
529 if (info->irq_adc) {
530 ret = max14577_muic_adc_handler(info);
531 info->irq_adc = false;
532 }
533 if (info->irq_chg) {
534 ret = max14577_muic_chg_handler(info);
535 info->irq_chg = false;
536 }
537
538 if (ret < 0)
539 dev_err(info->dev, "failed to handle MUIC interrupt\n");
540
541 mutex_unlock(&info->mutex);
542
543 return;
544}
545
4706a525
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546/*
547 * Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
548 * Returns 0 if irq_type does not match registered IRQ for this device type.
549 */
550static int max14577_parse_irq(struct max14577_muic_info *info, int irq_type)
962e56bf 551{
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552 switch (irq_type) {
553 case MAX14577_IRQ_INT1_ADC:
554 case MAX14577_IRQ_INT1_ADCLOW:
555 case MAX14577_IRQ_INT1_ADCERR:
556 /* Handle all of accessory except for
557 type of charger accessory */
558 info->irq_adc = true;
4706a525 559 return 1;
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560 case MAX14577_IRQ_INT2_CHGTYP:
561 case MAX14577_IRQ_INT2_CHGDETRUN:
562 case MAX14577_IRQ_INT2_DCDTMR:
563 case MAX14577_IRQ_INT2_DBCHG:
564 case MAX14577_IRQ_INT2_VBVOLT:
565 /* Handle charger accessory */
566 info->irq_chg = true;
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567 return 1;
568 default:
569 return 0;
570 }
571}
572
573/*
574 * Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
575 * Returns 0 if irq_type does not match registered IRQ for this device type.
576 */
577static int max77836_parse_irq(struct max14577_muic_info *info, int irq_type)
578{
579 /* First check common max14577 interrupts */
580 if (max14577_parse_irq(info, irq_type))
581 return 1;
582
583 switch (irq_type) {
584 case MAX77836_IRQ_INT1_ADC1K:
585 info->irq_adc = true;
586 return 1;
587 case MAX77836_IRQ_INT2_VIDRM:
588 /* Handle charger accessory */
589 info->irq_chg = true;
590 return 1;
591 default:
592 return 0;
593 }
594}
595
596static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
597{
598 struct max14577_muic_info *info = data;
599 int i, irq_type = -1;
600 bool irq_parsed;
601
602 /*
603 * We may be called multiple times for different nested IRQ-s.
604 * Including changes in INT1_ADC and INT2_CGHTYP at once.
605 * However we only need to know whether it was ADC, charger
606 * or both interrupts so decode IRQ and turn on proper flags.
607 */
608 for (i = 0; i < info->muic_irqs_num; i++)
609 if (irq == info->muic_irqs[i].virq)
610 irq_type = info->muic_irqs[i].irq;
611
612 switch (info->max14577->dev_type) {
613 case MAXIM_DEVICE_TYPE_MAX77836:
614 irq_parsed = max77836_parse_irq(info, irq_type);
962e56bf 615 break;
4706a525 616 case MAXIM_DEVICE_TYPE_MAX14577:
962e56bf 617 default:
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618 irq_parsed = max14577_parse_irq(info, irq_type);
619 break;
620 }
621
622 if (!irq_parsed) {
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623 dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n",
624 irq_type);
625 return IRQ_HANDLED;
626 }
627 schedule_work(&info->irq_work);
628
629 return IRQ_HANDLED;
630}
631
632static int max14577_muic_detect_accessory(struct max14577_muic_info *info)
633{
634 int ret = 0;
635 int adc;
636 int chg_type;
637 bool attached;
638
639 mutex_lock(&info->mutex);
640
641 /* Read STATUSx register to detect accessory */
642 ret = max14577_bulk_read(info->max14577->regmap,
643 MAX14577_MUIC_REG_STATUS1, info->status, 2);
644 if (ret) {
645 dev_err(info->dev, "failed to read MUIC register\n");
646 mutex_unlock(&info->mutex);
647 return ret;
648 }
649
650 adc = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC,
651 &attached);
652 if (attached && adc != MAX14577_MUIC_ADC_OPEN) {
653 ret = max14577_muic_adc_handler(info);
654 if (ret < 0) {
655 dev_err(info->dev, "Cannot detect accessory\n");
656 mutex_unlock(&info->mutex);
657 return ret;
658 }
659 }
660
661 chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG,
662 &attached);
663 if (attached && chg_type != MAX14577_CHARGER_TYPE_NONE) {
664 ret = max14577_muic_chg_handler(info);
665 if (ret < 0) {
666 dev_err(info->dev, "Cannot detect charger accessory\n");
667 mutex_unlock(&info->mutex);
668 return ret;
669 }
670 }
671
672 mutex_unlock(&info->mutex);
673
674 return 0;
675}
676
677static void max14577_muic_detect_cable_wq(struct work_struct *work)
678{
679 struct max14577_muic_info *info = container_of(to_delayed_work(work),
680 struct max14577_muic_info, wq_detcable);
681
682 max14577_muic_detect_accessory(info);
683}
684
685static int max14577_muic_probe(struct platform_device *pdev)
686{
687 struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
688 struct max14577_muic_info *info;
689 int delay_jiffies;
690 int ret;
691 int i;
692 u8 id;
693
694 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
695 if (!info) {
696 dev_err(&pdev->dev, "failed to allocate memory\n");
697 return -ENOMEM;
698 }
699 info->dev = &pdev->dev;
700 info->max14577 = max14577;
701
702 platform_set_drvdata(pdev, info);
703 mutex_init(&info->mutex);
704
705 INIT_WORK(&info->irq_work, max14577_muic_irq_work);
706
0ca852b7 707 switch (max14577->dev_type) {
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708 case MAXIM_DEVICE_TYPE_MAX77836:
709 info->muic_irqs = max77836_muic_irqs;
710 info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs);
711 break;
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712 case MAXIM_DEVICE_TYPE_MAX14577:
713 default:
714 info->muic_irqs = max14577_muic_irqs;
715 info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs);
716 }
717
962e56bf 718 /* Support irq domain for max14577 MUIC device */
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719 for (i = 0; i < info->muic_irqs_num; i++) {
720 struct max14577_muic_irq *muic_irq = &info->muic_irqs[i];
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721 unsigned int virq = 0;
722
723 virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq);
369afd4b 724 if (virq <= 0)
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725 return -EINVAL;
726 muic_irq->virq = virq;
727
728 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
729 max14577_muic_irq_handler,
730 IRQF_NO_SUSPEND,
731 muic_irq->name, info);
732 if (ret) {
733 dev_err(&pdev->dev,
734 "failed: irq request (IRQ: %d,"
735 " error :%d)\n",
736 muic_irq->irq, ret);
737 return ret;
738 }
739 }
740
741 /* Initialize extcon device */
742 info->edev = devm_kzalloc(&pdev->dev, sizeof(*info->edev), GFP_KERNEL);
743 if (!info->edev) {
744 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
745 return -ENOMEM;
746 }
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747
748 info->edev->name = dev_name(&pdev->dev);
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749 info->edev->supported_cable = max14577_extcon_cable;
750 ret = extcon_dev_register(info->edev);
751 if (ret) {
752 dev_err(&pdev->dev, "failed to register extcon device\n");
753 return ret;
754 }
755
756 /* Default h/w line path */
757 info->path_usb = CTRL1_SW_USB;
758 info->path_uart = CTRL1_SW_UART;
759 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
760
761 /* Set initial path for UART */
762 max14577_muic_set_path(info, info->path_uart, true);
763
764 /* Check revision number of MUIC device*/
765 ret = max14577_read_reg(info->max14577->regmap,
766 MAX14577_REG_DEVICEID, &id);
767 if (ret < 0) {
768 dev_err(&pdev->dev, "failed to read revision number\n");
769 goto err_extcon;
770 }
771 dev_info(info->dev, "device ID : 0x%x\n", id);
772
773 /* Set ADC debounce time */
774 max14577_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
775
776 /*
777 * Detect accessory after completing the initialization of platform
778 *
779 * - Use delayed workqueue to detect cable state and then
780 * notify cable state to notifiee/platform through uevent.
781 * After completing the booting of platform, the extcon provider
782 * driver should notify cable state to upper layer.
783 */
784 INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq);
12adef5b 785 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
962e56bf 786 delay_jiffies);
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787
788 return ret;
789
790err_extcon:
791 extcon_dev_unregister(info->edev);
792 return ret;
793}
794
795static int max14577_muic_remove(struct platform_device *pdev)
796{
797 struct max14577_muic_info *info = platform_get_drvdata(pdev);
798
799 cancel_work_sync(&info->irq_work);
800 extcon_dev_unregister(info->edev);
801
802 return 0;
803}
804
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805static const struct platform_device_id max14577_muic_id[] = {
806 { "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, },
807 { "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, },
808 { }
809};
810MODULE_DEVICE_TABLE(platform, max14577_muic_id);
811
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812static struct platform_driver max14577_muic_driver = {
813 .driver = {
4005da5c 814 .name = "max14577-muic",
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815 .owner = THIS_MODULE,
816 },
817 .probe = max14577_muic_probe,
818 .remove = max14577_muic_remove,
4706a525 819 .id_table = max14577_muic_id,
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820};
821
822module_platform_driver(max14577_muic_driver);
823
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824MODULE_DESCRIPTION("Maxim 14577/77836 Extcon driver");
825MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <k.kozlowski@samsung.com>");
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826MODULE_LICENSE("GPL");
827MODULE_ALIAS("platform:extcon-max14577");