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1// SPDX-License-Identifier: GPL-2.0+
2//
3// extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
4//
5// Copyright (C) 2012 Samsung Electrnoics
6// Chanwoo Choi <cw00.choi@samsung.com>
7
8#include <linux/devm-helpers.h>
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/i2c.h>
12#include <linux/slab.h>
13#include <linux/input.h>
14#include <linux/interrupt.h>
15#include <linux/err.h>
16#include <linux/platform_device.h>
17#include <linux/mfd/max77693.h>
18#include <linux/mfd/max77693-common.h>
19#include <linux/mfd/max77693-private.h>
20#include <linux/extcon-provider.h>
21#include <linux/regmap.h>
22#include <linux/irqdomain.h>
23
24#define DEV_NAME "max77693-muic"
25#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
26
27/*
28 * Default value of MAX77693 register to bring up MUIC device.
29 * If user don't set some initial value for MUIC device through platform data,
30 * extcon-max77693 driver use 'default_init_data' to bring up base operation
31 * of MAX77693 MUIC device.
32 */
33static struct max77693_reg_data default_init_data[] = {
34 {
35 /* STATUS2 - [3]ChgDetRun */
36 .addr = MAX77693_MUIC_REG_STATUS2,
37 .data = MAX77693_STATUS2_CHGDETRUN_MASK,
38 }, {
39 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
40 .addr = MAX77693_MUIC_REG_INTMASK1,
41 .data = INTMASK1_ADC1K_MASK
42 | INTMASK1_ADC_MASK,
43 }, {
44 /* INTMASK2 - Unmask [0]ChgTypM */
45 .addr = MAX77693_MUIC_REG_INTMASK2,
46 .data = INTMASK2_CHGTYP_MASK,
47 }, {
48 /* INTMASK3 - Mask all of interrupts */
49 .addr = MAX77693_MUIC_REG_INTMASK3,
50 .data = 0x0,
51 }, {
52 /* CDETCTRL2 */
53 .addr = MAX77693_MUIC_REG_CDETCTRL2,
54 .data = CDETCTRL2_VIDRMEN_MASK
55 | CDETCTRL2_DXOVPEN_MASK,
56 },
57};
58
59enum max77693_muic_adc_debounce_time {
60 ADC_DEBOUNCE_TIME_5MS = 0,
61 ADC_DEBOUNCE_TIME_10MS,
62 ADC_DEBOUNCE_TIME_25MS,
63 ADC_DEBOUNCE_TIME_38_62MS,
64};
65
66struct max77693_muic_info {
67 struct device *dev;
68 struct max77693_dev *max77693;
69 struct extcon_dev *edev;
70 int prev_cable_type;
71 int prev_cable_type_gnd;
72 int prev_chg_type;
73 int prev_button_type;
74 u8 status[2];
75
76 int irq;
77 struct work_struct irq_work;
78 struct mutex mutex;
79
80 /*
81 * Use delayed workqueue to detect cable state and then
82 * notify cable state to notifiee/platform through uevent.
83 * After completing the booting of platform, the extcon provider
84 * driver should notify cable state to upper layer.
85 */
86 struct delayed_work wq_detcable;
87
88 /* Button of dock device */
89 struct input_dev *dock;
90
91 /*
92 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
93 * h/w path of COMP2/COMN1 on CONTROL1 register.
94 */
95 int path_usb;
96 int path_uart;
97};
98
99enum max77693_muic_cable_group {
100 MAX77693_CABLE_GROUP_ADC = 0,
101 MAX77693_CABLE_GROUP_ADC_GND,
102 MAX77693_CABLE_GROUP_CHG,
103 MAX77693_CABLE_GROUP_VBVOLT,
104};
105
106enum max77693_muic_charger_type {
107 MAX77693_CHARGER_TYPE_NONE = 0,
108 MAX77693_CHARGER_TYPE_USB,
109 MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
110 MAX77693_CHARGER_TYPE_DEDICATED_CHG,
111 MAX77693_CHARGER_TYPE_APPLE_500MA,
112 MAX77693_CHARGER_TYPE_APPLE_1A_2A,
113 MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
114};
115
116/**
117 * struct max77693_muic_irq
118 * @irq: the index of irq list of MUIC device.
119 * @name: the name of irq.
120 * @virq: the virtual irq to use irq domain
121 */
122struct max77693_muic_irq {
123 unsigned int irq;
124 const char *name;
125 unsigned int virq;
126};
127
128static struct max77693_muic_irq muic_irqs[] = {
129 { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" },
130 { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" },
131 { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" },
132 { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" },
133 { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
134 { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" },
135 { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
136 { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" },
137 { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
138 { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" },
139 { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" },
140 { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" },
141 { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" },
142 { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" },
143 { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" },
144 { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" },
145};
146
147/* Define supported accessory type */
148enum max77693_muic_acc_type {
149 MAX77693_MUIC_ADC_GROUND = 0x0,
150 MAX77693_MUIC_ADC_SEND_END_BUTTON,
151 MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
152 MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
153 MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
154 MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
155 MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
156 MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
157 MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
158 MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
159 MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
160 MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
161 MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
162 MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
163 MAX77693_MUIC_ADC_RESERVED_ACC_1,
164 MAX77693_MUIC_ADC_RESERVED_ACC_2,
165 MAX77693_MUIC_ADC_RESERVED_ACC_3,
166 MAX77693_MUIC_ADC_RESERVED_ACC_4,
167 MAX77693_MUIC_ADC_RESERVED_ACC_5,
168 MAX77693_MUIC_ADC_CEA936_AUDIO,
169 MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
170 MAX77693_MUIC_ADC_TTY_CONVERTER,
171 MAX77693_MUIC_ADC_UART_CABLE,
172 MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
173 MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
174 MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
175 MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
176 MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
177 MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
178 MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
179 MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
180 MAX77693_MUIC_ADC_OPEN,
181
182 /*
183 * The below accessories have same ADC value so ADCLow and
184 * ADC1K bit is used to separate specific accessory.
185 */
186 /* ADC|VBVolot|ADCLow|ADC1K| */
187 MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */
188 MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */
189 MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */
190 MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */
191 MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */
192};
193
194/*
195 * MAX77693 MUIC device support below list of accessories(external connector)
196 */
197static const unsigned int max77693_extcon_cable[] = {
198 EXTCON_USB,
199 EXTCON_USB_HOST,
200 EXTCON_CHG_USB_SDP,
201 EXTCON_CHG_USB_DCP,
202 EXTCON_CHG_USB_FAST,
203 EXTCON_CHG_USB_SLOW,
204 EXTCON_CHG_USB_CDP,
205 EXTCON_DISP_MHL,
206 EXTCON_JIG,
207 EXTCON_DOCK,
208 EXTCON_NONE,
209};
210
211/*
212 * max77693_muic_set_debounce_time - Set the debounce time of ADC
213 * @info: the instance including private data of max77693 MUIC
214 * @time: the debounce time of ADC
215 */
216static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
217 enum max77693_muic_adc_debounce_time time)
218{
219 int ret;
220
221 switch (time) {
222 case ADC_DEBOUNCE_TIME_5MS:
223 case ADC_DEBOUNCE_TIME_10MS:
224 case ADC_DEBOUNCE_TIME_25MS:
225 case ADC_DEBOUNCE_TIME_38_62MS:
226 /*
227 * Don't touch BTLDset, JIGset when you want to change adc
228 * debounce time. If it writes other than 0 to BTLDset, JIGset
229 * muic device will be reset and loose current state.
230 */
231 ret = regmap_write(info->max77693->regmap_muic,
232 MAX77693_MUIC_REG_CTRL3,
233 time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
234 if (ret) {
235 dev_err(info->dev, "failed to set ADC debounce time\n");
236 return ret;
237 }
238 break;
239 default:
240 dev_err(info->dev, "invalid ADC debounce time\n");
241 return -EINVAL;
242 }
243
244 return 0;
245};
246
247/*
248 * max77693_muic_set_path - Set hardware line according to attached cable
249 * @info: the instance including private data of max77693 MUIC
250 * @value: the path according to attached cable
251 * @attached: the state of cable (true:attached, false:detached)
252 *
253 * The max77693 MUIC device share outside H/W line among a varity of cables
254 * so, this function set internal path of H/W line according to the type of
255 * attached cable.
256 */
257static int max77693_muic_set_path(struct max77693_muic_info *info,
258 u8 val, bool attached)
259{
260 int ret;
261 unsigned int ctrl1, ctrl2 = 0;
262
263 if (attached)
264 ctrl1 = val;
265 else
266 ctrl1 = MAX77693_CONTROL1_SW_OPEN;
267
268 ret = regmap_update_bits(info->max77693->regmap_muic,
269 MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
270 if (ret < 0) {
271 dev_err(info->dev, "failed to update MUIC register\n");
272 return ret;
273 }
274
275 if (attached)
276 ctrl2 |= MAX77693_CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
277 else
278 ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
279
280 ret = regmap_update_bits(info->max77693->regmap_muic,
281 MAX77693_MUIC_REG_CTRL2,
282 MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
283 ctrl2);
284 if (ret < 0) {
285 dev_err(info->dev, "failed to update MUIC register\n");
286 return ret;
287 }
288
289 dev_info(info->dev,
290 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
291 ctrl1, ctrl2, attached ? "attached" : "detached");
292
293 return 0;
294}
295
296/*
297 * max77693_muic_get_cable_type - Return cable type and check cable state
298 * @info: the instance including private data of max77693 MUIC
299 * @group: the path according to attached cable
300 * @attached: store cable state and return
301 *
302 * This function check the cable state either attached or detached,
303 * and then divide precise type of cable according to cable group.
304 * - MAX77693_CABLE_GROUP_ADC
305 * - MAX77693_CABLE_GROUP_ADC_GND
306 * - MAX77693_CABLE_GROUP_CHG
307 * - MAX77693_CABLE_GROUP_VBVOLT
308 */
309static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
310 enum max77693_muic_cable_group group, bool *attached)
311{
312 int cable_type = 0;
313 int adc;
314 int adc1k;
315 int adclow;
316 int vbvolt;
317 int chg_type;
318
319 switch (group) {
320 case MAX77693_CABLE_GROUP_ADC:
321 /*
322 * Read ADC value to check cable type and decide cable state
323 * according to cable type
324 */
325 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
326 adc >>= MAX77693_STATUS1_ADC_SHIFT;
327
328 /*
329 * Check current cable state/cable type and store cable type
330 * (info->prev_cable_type) for handling cable when cable is
331 * detached.
332 */
333 if (adc == MAX77693_MUIC_ADC_OPEN) {
334 *attached = false;
335
336 cable_type = info->prev_cable_type;
337 info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
338 } else {
339 *attached = true;
340
341 cable_type = info->prev_cable_type = adc;
342 }
343 break;
344 case MAX77693_CABLE_GROUP_ADC_GND:
345 /*
346 * Read ADC value to check cable type and decide cable state
347 * according to cable type
348 */
349 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
350 adc >>= MAX77693_STATUS1_ADC_SHIFT;
351
352 /*
353 * Check current cable state/cable type and store cable type
354 * (info->prev_cable_type/_gnd) for handling cable when cable
355 * is detached.
356 */
357 if (adc == MAX77693_MUIC_ADC_OPEN) {
358 *attached = false;
359
360 cable_type = info->prev_cable_type_gnd;
361 info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
362 } else {
363 *attached = true;
364
365 adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
366 adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
367 adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
368 adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
369
370 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
371 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
372
373 /**
374 * [0x1|VBVolt|ADCLow|ADC1K]
375 * [0x1| 0| 0| 0] USB_HOST
376 * [0x1| 1| 0| 0] USB_HSOT_VB
377 * [0x1| 0| 1| 0] Audio Video cable with load
378 * [0x1| 0| 1| 1] MHL without charging cable
379 * [0x1| 1| 1| 1] MHL with charging cable
380 */
381 cable_type = ((0x1 << 8)
382 | (vbvolt << 2)
383 | (adclow << 1)
384 | adc1k);
385
386 info->prev_cable_type = adc;
387 info->prev_cable_type_gnd = cable_type;
388 }
389
390 break;
391 case MAX77693_CABLE_GROUP_CHG:
392 /*
393 * Read charger type to check cable type and decide cable state
394 * according to type of charger cable.
395 */
396 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
397 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
398
399 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
400 *attached = false;
401
402 cable_type = info->prev_chg_type;
403 info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
404 } else {
405 *attached = true;
406
407 /*
408 * Check current cable state/cable type and store cable
409 * type(info->prev_chg_type) for handling cable when
410 * charger cable is detached.
411 */
412 cable_type = info->prev_chg_type = chg_type;
413 }
414
415 break;
416 case MAX77693_CABLE_GROUP_VBVOLT:
417 /*
418 * Read ADC value to check cable type and decide cable state
419 * according to cable type
420 */
421 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
422 adc >>= MAX77693_STATUS1_ADC_SHIFT;
423 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
424 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
425
426 if (adc == MAX77693_MUIC_ADC_OPEN
427 && chg_type == MAX77693_CHARGER_TYPE_NONE)
428 *attached = false;
429 else
430 *attached = true;
431
432 /*
433 * Read vbvolt field, if vbvolt is 1,
434 * this cable is used for charging.
435 */
436 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
437 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
438
439 cable_type = vbvolt;
440 break;
441 default:
442 dev_err(info->dev, "Unknown cable group (%d)\n", group);
443 cable_type = -EINVAL;
444 break;
445 }
446
447 return cable_type;
448}
449
450static int max77693_muic_dock_handler(struct max77693_muic_info *info,
451 int cable_type, bool attached)
452{
453 int ret = 0;
454 int vbvolt;
455 bool cable_attached;
456 unsigned int dock_id;
457
458 dev_info(info->dev,
459 "external connector is %s (adc:0x%02x)\n",
460 attached ? "attached" : "detached", cable_type);
461
462 switch (cable_type) {
463 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
464 /*
465 * Check power cable whether attached or detached state.
466 * The Dock-Smart device need surely external power supply.
467 * If power cable(USB/TA) isn't connected to Dock device,
468 * user can't use Dock-Smart for desktop mode.
469 */
470 vbvolt = max77693_muic_get_cable_type(info,
471 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
472 if (attached && !vbvolt) {
473 dev_warn(info->dev,
474 "Cannot detect external power supply\n");
475 return 0;
476 }
477
478 /*
479 * Notify Dock/MHL state.
480 * - Dock device include three type of cable which
481 * are HDMI, USB for mouse/keyboard and micro-usb port
482 * for USB/TA cable. Dock device need always exteranl
483 * power supply(USB/TA cable through micro-usb cable). Dock
484 * device support screen output of target to separate
485 * monitor and mouse/keyboard for desktop mode.
486 *
487 * Features of 'USB/TA cable with Dock device'
488 * - Support MHL
489 * - Support external output feature of audio
490 * - Support charging through micro-usb port without data
491 * connection if TA cable is connected to target.
492 * - Support charging and data connection through micro-usb port
493 * if USB cable is connected between target and host
494 * device.
495 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
496 */
497 ret = max77693_muic_set_path(info, info->path_usb, attached);
498 if (ret < 0)
499 return ret;
500
501 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
502 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
503 goto out;
504 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
505 dock_id = EXTCON_DOCK;
506 break;
507 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
508 dock_id = EXTCON_DOCK;
509 if (!attached) {
510 extcon_set_state_sync(info->edev, EXTCON_USB, false);
511 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
512 false);
513 }
514 break;
515 default:
516 dev_err(info->dev, "failed to detect %s dock device\n",
517 attached ? "attached" : "detached");
518 return -EINVAL;
519 }
520
521 /* Dock-Car/Desk/Audio, PATH:AUDIO */
522 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
523 attached);
524 if (ret < 0)
525 return ret;
526 extcon_set_state_sync(info->edev, dock_id, attached);
527
528out:
529 return 0;
530}
531
532static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
533 int button_type, bool attached)
534{
535 struct input_dev *dock = info->dock;
536 unsigned int code;
537
538 switch (button_type) {
539 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
540 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
541 /* DOCK_KEY_PREV */
542 code = KEY_PREVIOUSSONG;
543 break;
544 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
545 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
546 /* DOCK_KEY_NEXT */
547 code = KEY_NEXTSONG;
548 break;
549 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
550 /* DOCK_VOL_DOWN */
551 code = KEY_VOLUMEDOWN;
552 break;
553 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
554 /* DOCK_VOL_UP */
555 code = KEY_VOLUMEUP;
556 break;
557 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
558 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
559 /* DOCK_KEY_PLAY_PAUSE */
560 code = KEY_PLAYPAUSE;
561 break;
562 default:
563 dev_err(info->dev,
564 "failed to detect %s key (adc:0x%x)\n",
565 attached ? "pressed" : "released", button_type);
566 return -EINVAL;
567 }
568
569 input_event(dock, EV_KEY, code, attached);
570 input_sync(dock);
571
572 return 0;
573}
574
575static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
576{
577 int cable_type_gnd;
578 int ret = 0;
579 bool attached;
580
581 cable_type_gnd = max77693_muic_get_cable_type(info,
582 MAX77693_CABLE_GROUP_ADC_GND, &attached);
583
584 switch (cable_type_gnd) {
585 case MAX77693_MUIC_GND_USB_HOST:
586 case MAX77693_MUIC_GND_USB_HOST_VB:
587 /* USB_HOST, PATH: AP_USB */
588 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
589 attached);
590 if (ret < 0)
591 return ret;
592 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
593 break;
594 case MAX77693_MUIC_GND_AV_CABLE_LOAD:
595 /* Audio Video Cable with load, PATH:AUDIO */
596 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
597 attached);
598 if (ret < 0)
599 return ret;
600 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
601 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
602 attached);
603 break;
604 case MAX77693_MUIC_GND_MHL:
605 case MAX77693_MUIC_GND_MHL_VB:
606 /* MHL or MHL with USB/TA cable */
607 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
608 break;
609 default:
610 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
611 attached ? "attached" : "detached");
612 return -EINVAL;
613 }
614
615 return 0;
616}
617
618static int max77693_muic_jig_handler(struct max77693_muic_info *info,
619 int cable_type, bool attached)
620{
621 int ret = 0;
622 u8 path = MAX77693_CONTROL1_SW_OPEN;
623
624 dev_info(info->dev,
625 "external connector is %s (adc:0x%02x)\n",
626 attached ? "attached" : "detached", cable_type);
627
628 switch (cable_type) {
629 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */
630 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
631 /* PATH:AP_USB */
632 path = MAX77693_CONTROL1_SW_USB;
633 break;
634 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
635 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* ADC_JIG_UART_ON */
636 /* PATH:AP_UART */
637 path = MAX77693_CONTROL1_SW_UART;
638 break;
639 default:
640 dev_err(info->dev, "failed to detect %s jig cable\n",
641 attached ? "attached" : "detached");
642 return -EINVAL;
643 }
644
645 ret = max77693_muic_set_path(info, path, attached);
646 if (ret < 0)
647 return ret;
648
649 extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
650
651 return 0;
652}
653
654static int max77693_muic_adc_handler(struct max77693_muic_info *info)
655{
656 int cable_type;
657 int button_type;
658 bool attached;
659 int ret = 0;
660
661 /* Check accessory state which is either detached or attached */
662 cable_type = max77693_muic_get_cable_type(info,
663 MAX77693_CABLE_GROUP_ADC, &attached);
664
665 dev_info(info->dev,
666 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
667 attached ? "attached" : "detached", cable_type,
668 info->prev_cable_type);
669
670 switch (cable_type) {
671 case MAX77693_MUIC_ADC_GROUND:
672 /* USB_HOST/MHL/Audio */
673 max77693_muic_adc_ground_handler(info);
674 break;
675 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
676 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
677 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
678 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
679 /* JIG */
680 ret = max77693_muic_jig_handler(info, cable_type, attached);
681 if (ret < 0)
682 return ret;
683 break;
684 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
685 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
686 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
687 /*
688 * DOCK device
689 *
690 * The MAX77693 MUIC device can detect total 34 cable type
691 * except of charger cable and MUIC device didn't define
692 * specfic role of cable in the range of from 0x01 to 0x12
693 * of ADC value. So, can use/define cable with no role according
694 * to schema of hardware board.
695 */
696 ret = max77693_muic_dock_handler(info, cable_type, attached);
697 if (ret < 0)
698 return ret;
699 break;
700 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */
701 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */
702 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */
703 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */
704 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */
705 /*
706 * Button of DOCK device
707 * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
708 *
709 * The MAX77693 MUIC device can detect total 34 cable type
710 * except of charger cable and MUIC device didn't define
711 * specfic role of cable in the range of from 0x01 to 0x12
712 * of ADC value. So, can use/define cable with no role according
713 * to schema of hardware board.
714 */
715 if (attached)
716 button_type = info->prev_button_type = cable_type;
717 else
718 button_type = info->prev_button_type;
719
720 ret = max77693_muic_dock_button_handler(info, button_type,
721 attached);
722 if (ret < 0)
723 return ret;
724 break;
725 case MAX77693_MUIC_ADC_SEND_END_BUTTON:
726 case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
727 case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
728 case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
729 case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
730 case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
731 case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
732 case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
733 case MAX77693_MUIC_ADC_RESERVED_ACC_1:
734 case MAX77693_MUIC_ADC_RESERVED_ACC_2:
735 case MAX77693_MUIC_ADC_RESERVED_ACC_4:
736 case MAX77693_MUIC_ADC_RESERVED_ACC_5:
737 case MAX77693_MUIC_ADC_CEA936_AUDIO:
738 case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
739 case MAX77693_MUIC_ADC_TTY_CONVERTER:
740 case MAX77693_MUIC_ADC_UART_CABLE:
741 case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
742 case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
743 /*
744 * This accessory isn't used in general case if it is specially
745 * needed to detect additional accessory, should implement
746 * proper operation when this accessory is attached/detached.
747 */
748 dev_info(info->dev,
749 "accessory is %s but it isn't used (adc:0x%x)\n",
750 attached ? "attached" : "detached", cable_type);
751 return -EAGAIN;
752 default:
753 dev_err(info->dev,
754 "failed to detect %s accessory (adc:0x%x)\n",
755 attached ? "attached" : "detached", cable_type);
756 return -EINVAL;
757 }
758
759 return 0;
760}
761
762static int max77693_muic_chg_handler(struct max77693_muic_info *info)
763{
764 int chg_type;
765 int cable_type_gnd;
766 int cable_type;
767 bool attached;
768 bool cable_attached;
769 int ret = 0;
770
771 chg_type = max77693_muic_get_cable_type(info,
772 MAX77693_CABLE_GROUP_CHG, &attached);
773
774 dev_info(info->dev,
775 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
776 attached ? "attached" : "detached",
777 chg_type, info->prev_chg_type);
778
779 switch (chg_type) {
780 case MAX77693_CHARGER_TYPE_USB:
781 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
782 case MAX77693_CHARGER_TYPE_NONE:
783 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
784 cable_type_gnd = max77693_muic_get_cable_type(info,
785 MAX77693_CABLE_GROUP_ADC_GND,
786 &cable_attached);
787 switch (cable_type_gnd) {
788 case MAX77693_MUIC_GND_MHL:
789 case MAX77693_MUIC_GND_MHL_VB:
790 /*
791 * MHL cable with USB/TA cable
792 * - MHL cable include two port(HDMI line and separate
793 * micro-usb port. When the target connect MHL cable,
794 * extcon driver check whether USB/TA cable is
795 * connected. If USB/TA cable is connected, extcon
796 * driver notify state to notifiee for charging battery.
797 *
798 * Features of 'USB/TA with MHL cable'
799 * - Support MHL
800 * - Support charging through micro-usb port without
801 * data connection
802 */
803 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
804 attached);
805 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
806 cable_attached);
807 break;
808 }
809
810 /* Check MAX77693_CABLE_GROUP_ADC type */
811 cable_type = max77693_muic_get_cable_type(info,
812 MAX77693_CABLE_GROUP_ADC,
813 &cable_attached);
814 switch (cable_type) {
815 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
816 /*
817 * Dock-Audio device with USB/TA cable
818 * - Dock device include two port(Dock-Audio and micro-
819 * usb port). When the target connect Dock-Audio device,
820 * extcon driver check whether USB/TA cable is connected
821 * or not. If USB/TA cable is connected, extcon driver
822 * notify state to notifiee for charging battery.
823 *
824 * Features of 'USB/TA cable with Dock-Audio device'
825 * - Support external output feature of audio.
826 * - Support charging through micro-usb port without
827 * data connection.
828 */
829 extcon_set_state_sync(info->edev, EXTCON_USB,
830 attached);
831 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
832 attached);
833
834 if (!cable_attached)
835 extcon_set_state_sync(info->edev, EXTCON_DOCK,
836 cable_attached);
837 break;
838 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
839 /*
840 * Dock-Smart device with USB/TA cable
841 * - Dock-Desk device include three type of cable which
842 * are HDMI, USB for mouse/keyboard and micro-usb port
843 * for USB/TA cable. Dock-Smart device need always
844 * exteranl power supply(USB/TA cable through micro-usb
845 * cable). Dock-Smart device support screen output of
846 * target to separate monitor and mouse/keyboard for
847 * desktop mode.
848 *
849 * Features of 'USB/TA cable with Dock-Smart device'
850 * - Support MHL
851 * - Support external output feature of audio
852 * - Support charging through micro-usb port without
853 * data connection if TA cable is connected to target.
854 * - Support charging and data connection through micro-
855 * usb port if USB cable is connected between target
856 * and host device
857 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
858 */
859 ret = max77693_muic_set_path(info, info->path_usb,
860 attached);
861 if (ret < 0)
862 return ret;
863
864 extcon_set_state_sync(info->edev, EXTCON_DOCK,
865 attached);
866 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
867 attached);
868 break;
869 }
870
871 /* Check MAX77693_CABLE_GROUP_CHG type */
872 switch (chg_type) {
873 case MAX77693_CHARGER_TYPE_NONE:
874 /*
875 * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
876 * cable is attached, muic device happen below two irq.
877 * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
878 * MHL/Dock-Audio.
879 * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
880 * USB/TA cable connected to MHL or Dock-Audio.
881 * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
882 * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
883 *
884 * If user attach MHL (with USB/TA cable and immediately
885 * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
886 * _INT2_CHGTYP irq is happened, USB/TA cable remain
887 * connected state to target. But USB/TA cable isn't
888 * connected to target. The user be face with unusual
889 * action. So, driver should check this situation in
890 * spite of, that previous charger type is N/A.
891 */
892 break;
893 case MAX77693_CHARGER_TYPE_USB:
894 /* Only USB cable, PATH:AP_USB */
895 ret = max77693_muic_set_path(info, info->path_usb,
896 attached);
897 if (ret < 0)
898 return ret;
899
900 extcon_set_state_sync(info->edev, EXTCON_USB,
901 attached);
902 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
903 attached);
904 break;
905 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
906 /* Only TA cable */
907 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
908 attached);
909 break;
910 }
911 break;
912 case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
913 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
914 attached);
915 break;
916 case MAX77693_CHARGER_TYPE_APPLE_500MA:
917 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
918 attached);
919 break;
920 case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
921 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
922 attached);
923 break;
924 case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
925 break;
926 default:
927 dev_err(info->dev,
928 "failed to detect %s accessory (chg_type:0x%x)\n",
929 attached ? "attached" : "detached", chg_type);
930 return -EINVAL;
931 }
932
933 return 0;
934}
935
936static void max77693_muic_irq_work(struct work_struct *work)
937{
938 struct max77693_muic_info *info = container_of(work,
939 struct max77693_muic_info, irq_work);
940 int irq_type = -1;
941 int i, ret = 0;
942
943 if (!info->edev)
944 return;
945
946 mutex_lock(&info->mutex);
947
948 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
949 if (info->irq == muic_irqs[i].virq)
950 irq_type = muic_irqs[i].irq;
951
952 ret = regmap_bulk_read(info->max77693->regmap_muic,
953 MAX77693_MUIC_REG_STATUS1, info->status, 2);
954 if (ret) {
955 dev_err(info->dev, "failed to read MUIC register\n");
956 mutex_unlock(&info->mutex);
957 return;
958 }
959
960 switch (irq_type) {
961 case MAX77693_MUIC_IRQ_INT1_ADC:
962 case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
963 case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
964 case MAX77693_MUIC_IRQ_INT1_ADC1K:
965 /*
966 * Handle all of accessory except for
967 * type of charger accessory.
968 */
969 ret = max77693_muic_adc_handler(info);
970 break;
971 case MAX77693_MUIC_IRQ_INT2_CHGTYP:
972 case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
973 case MAX77693_MUIC_IRQ_INT2_DCDTMR:
974 case MAX77693_MUIC_IRQ_INT2_DXOVP:
975 case MAX77693_MUIC_IRQ_INT2_VBVOLT:
976 case MAX77693_MUIC_IRQ_INT2_VIDRM:
977 /* Handle charger accessory */
978 ret = max77693_muic_chg_handler(info);
979 break;
980 case MAX77693_MUIC_IRQ_INT3_EOC:
981 case MAX77693_MUIC_IRQ_INT3_CGMBC:
982 case MAX77693_MUIC_IRQ_INT3_OVP:
983 case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
984 case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
985 case MAX77693_MUIC_IRQ_INT3_BAT_DET:
986 break;
987 default:
988 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
989 irq_type);
990 mutex_unlock(&info->mutex);
991 return;
992 }
993
994 if (ret < 0)
995 dev_err(info->dev, "failed to handle MUIC interrupt\n");
996
997 mutex_unlock(&info->mutex);
998}
999
1000static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1001{
1002 struct max77693_muic_info *info = data;
1003
1004 info->irq = irq;
1005 schedule_work(&info->irq_work);
1006
1007 return IRQ_HANDLED;
1008}
1009
1010static const struct regmap_config max77693_muic_regmap_config = {
1011 .reg_bits = 8,
1012 .val_bits = 8,
1013};
1014
1015static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1016{
1017 int ret = 0;
1018 int adc;
1019 int chg_type;
1020 bool attached;
1021
1022 mutex_lock(&info->mutex);
1023
1024 /* Read STATUSx register to detect accessory */
1025 ret = regmap_bulk_read(info->max77693->regmap_muic,
1026 MAX77693_MUIC_REG_STATUS1, info->status, 2);
1027 if (ret) {
1028 dev_err(info->dev, "failed to read MUIC register\n");
1029 mutex_unlock(&info->mutex);
1030 return ret;
1031 }
1032
1033 adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1034 &attached);
1035 if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1036 ret = max77693_muic_adc_handler(info);
1037 if (ret < 0) {
1038 dev_err(info->dev, "Cannot detect accessory\n");
1039 mutex_unlock(&info->mutex);
1040 return ret;
1041 }
1042 }
1043
1044 chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1045 &attached);
1046 if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1047 ret = max77693_muic_chg_handler(info);
1048 if (ret < 0) {
1049 dev_err(info->dev, "Cannot detect charger accessory\n");
1050 mutex_unlock(&info->mutex);
1051 return ret;
1052 }
1053 }
1054
1055 mutex_unlock(&info->mutex);
1056
1057 return 0;
1058}
1059
1060static void max77693_muic_detect_cable_wq(struct work_struct *work)
1061{
1062 struct max77693_muic_info *info = container_of(to_delayed_work(work),
1063 struct max77693_muic_info, wq_detcable);
1064
1065 max77693_muic_detect_accessory(info);
1066}
1067
1068static int max77693_muic_probe(struct platform_device *pdev)
1069{
1070 struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1071 struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1072 struct max77693_muic_info *info;
1073 struct max77693_reg_data *init_data;
1074 int num_init_data;
1075 int delay_jiffies;
1076 int cable_type;
1077 bool attached;
1078 int ret;
1079 int i;
1080 unsigned int id;
1081
1082 info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1083 GFP_KERNEL);
1084 if (!info)
1085 return -ENOMEM;
1086
1087 info->dev = &pdev->dev;
1088 info->max77693 = max77693;
1089 if (info->max77693->regmap_muic) {
1090 dev_dbg(&pdev->dev, "allocate register map\n");
1091 } else {
1092 info->max77693->regmap_muic = devm_regmap_init_i2c(
1093 info->max77693->i2c_muic,
1094 &max77693_muic_regmap_config);
1095 if (IS_ERR(info->max77693->regmap_muic)) {
1096 ret = PTR_ERR(info->max77693->regmap_muic);
1097 dev_err(max77693->dev,
1098 "failed to allocate register map: %d\n", ret);
1099 return ret;
1100 }
1101 }
1102
1103 /* Register input device for button of dock device */
1104 info->dock = devm_input_allocate_device(&pdev->dev);
1105 if (!info->dock) {
1106 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1107 return -ENOMEM;
1108 }
1109 info->dock->name = "max77693-muic/dock";
1110 info->dock->phys = "max77693-muic/extcon";
1111 info->dock->dev.parent = &pdev->dev;
1112
1113 __set_bit(EV_REP, info->dock->evbit);
1114
1115 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1116 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1117 input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1118 input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1119 input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1120
1121 ret = input_register_device(info->dock);
1122 if (ret < 0) {
1123 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1124 ret);
1125 return ret;
1126 }
1127
1128 platform_set_drvdata(pdev, info);
1129 mutex_init(&info->mutex);
1130
1131 ret = devm_work_autocancel(&pdev->dev, &info->irq_work,
1132 max77693_muic_irq_work);
1133 if (ret)
1134 return ret;
1135
1136 /* Support irq domain for MAX77693 MUIC device */
1137 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1138 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1139 int virq;
1140
1141 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1142 muic_irq->irq);
1143 if (virq <= 0)
1144 return -EINVAL;
1145 muic_irq->virq = virq;
1146
1147 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1148 max77693_muic_irq_handler,
1149 IRQF_NO_SUSPEND,
1150 muic_irq->name, info);
1151 if (ret) {
1152 dev_err(&pdev->dev,
1153 "failed: irq request (IRQ: %d, error :%d)\n",
1154 muic_irq->irq, ret);
1155 return ret;
1156 }
1157 }
1158
1159 /* Initialize extcon device */
1160 info->edev = devm_extcon_dev_allocate(&pdev->dev,
1161 max77693_extcon_cable);
1162 if (IS_ERR(info->edev)) {
1163 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1164 return PTR_ERR(info->edev);
1165 }
1166
1167 ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1168 if (ret) {
1169 dev_err(&pdev->dev, "failed to register extcon device\n");
1170 return ret;
1171 }
1172
1173 /* Initialize MUIC register by using platform data or default data */
1174 if (pdata && pdata->muic_data) {
1175 init_data = pdata->muic_data->init_data;
1176 num_init_data = pdata->muic_data->num_init_data;
1177 } else {
1178 init_data = default_init_data;
1179 num_init_data = ARRAY_SIZE(default_init_data);
1180 }
1181
1182 for (i = 0; i < num_init_data; i++) {
1183 regmap_write(info->max77693->regmap_muic,
1184 init_data[i].addr,
1185 init_data[i].data);
1186 }
1187
1188 if (pdata && pdata->muic_data) {
1189 struct max77693_muic_platform_data *muic_pdata
1190 = pdata->muic_data;
1191
1192 /*
1193 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1194 * h/w path of COMP2/COMN1 on CONTROL1 register.
1195 */
1196 if (muic_pdata->path_uart)
1197 info->path_uart = muic_pdata->path_uart;
1198 else
1199 info->path_uart = MAX77693_CONTROL1_SW_UART;
1200
1201 if (muic_pdata->path_usb)
1202 info->path_usb = muic_pdata->path_usb;
1203 else
1204 info->path_usb = MAX77693_CONTROL1_SW_USB;
1205
1206 /*
1207 * Default delay time for detecting cable state
1208 * after certain time.
1209 */
1210 if (muic_pdata->detcable_delay_ms)
1211 delay_jiffies =
1212 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1213 else
1214 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1215 } else {
1216 info->path_usb = MAX77693_CONTROL1_SW_USB;
1217 info->path_uart = MAX77693_CONTROL1_SW_UART;
1218 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1219 }
1220
1221 /* Set initial path for UART when JIG is connected to get serial logs */
1222 ret = regmap_bulk_read(info->max77693->regmap_muic,
1223 MAX77693_MUIC_REG_STATUS1, info->status, 2);
1224 if (ret) {
1225 dev_err(info->dev, "failed to read MUIC register\n");
1226 return ret;
1227 }
1228 cable_type = max77693_muic_get_cable_type(info,
1229 MAX77693_CABLE_GROUP_ADC, &attached);
1230 if (attached && (cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON ||
1231 cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF))
1232 max77693_muic_set_path(info, info->path_uart, true);
1233
1234 /* Check revision number of MUIC device*/
1235 ret = regmap_read(info->max77693->regmap_muic,
1236 MAX77693_MUIC_REG_ID, &id);
1237 if (ret < 0) {
1238 dev_err(&pdev->dev, "failed to read revision number\n");
1239 return ret;
1240 }
1241 dev_info(info->dev, "device ID : 0x%x\n", id);
1242
1243 /* Set ADC debounce time */
1244 max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1245
1246 /*
1247 * Detect accessory after completing the initialization of platform
1248 *
1249 * - Use delayed workqueue to detect cable state and then
1250 * notify cable state to notifiee/platform through uevent.
1251 * After completing the booting of platform, the extcon provider
1252 * driver should notify cable state to upper layer.
1253 */
1254 INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1255 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1256 delay_jiffies);
1257
1258 return ret;
1259}
1260
1261static struct platform_driver max77693_muic_driver = {
1262 .driver = {
1263 .name = DEV_NAME,
1264 },
1265 .probe = max77693_muic_probe,
1266};
1267
1268module_platform_driver(max77693_muic_driver);
1269
1270MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1271MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1272MODULE_LICENSE("GPL");
1273MODULE_ALIAS("platform:max77693-muic");
1/*
2 * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
3 *
4 * Copyright (C) 2012 Samsung Electrnoics
5 * Chanwoo Choi <cw00.choi@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/i2c.h>
21#include <linux/slab.h>
22#include <linux/input.h>
23#include <linux/interrupt.h>
24#include <linux/err.h>
25#include <linux/platform_device.h>
26#include <linux/mfd/max77693.h>
27#include <linux/mfd/max77693-common.h>
28#include <linux/mfd/max77693-private.h>
29#include <linux/extcon.h>
30#include <linux/regmap.h>
31#include <linux/irqdomain.h>
32
33#define DEV_NAME "max77693-muic"
34#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
35
36/*
37 * Default value of MAX77693 register to bring up MUIC device.
38 * If user don't set some initial value for MUIC device through platform data,
39 * extcon-max77693 driver use 'default_init_data' to bring up base operation
40 * of MAX77693 MUIC device.
41 */
42static struct max77693_reg_data default_init_data[] = {
43 {
44 /* STATUS2 - [3]ChgDetRun */
45 .addr = MAX77693_MUIC_REG_STATUS2,
46 .data = MAX77693_STATUS2_CHGDETRUN_MASK,
47 }, {
48 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
49 .addr = MAX77693_MUIC_REG_INTMASK1,
50 .data = INTMASK1_ADC1K_MASK
51 | INTMASK1_ADC_MASK,
52 }, {
53 /* INTMASK2 - Unmask [0]ChgTypM */
54 .addr = MAX77693_MUIC_REG_INTMASK2,
55 .data = INTMASK2_CHGTYP_MASK,
56 }, {
57 /* INTMASK3 - Mask all of interrupts */
58 .addr = MAX77693_MUIC_REG_INTMASK3,
59 .data = 0x0,
60 }, {
61 /* CDETCTRL2 */
62 .addr = MAX77693_MUIC_REG_CDETCTRL2,
63 .data = CDETCTRL2_VIDRMEN_MASK
64 | CDETCTRL2_DXOVPEN_MASK,
65 },
66};
67
68enum max77693_muic_adc_debounce_time {
69 ADC_DEBOUNCE_TIME_5MS = 0,
70 ADC_DEBOUNCE_TIME_10MS,
71 ADC_DEBOUNCE_TIME_25MS,
72 ADC_DEBOUNCE_TIME_38_62MS,
73};
74
75struct max77693_muic_info {
76 struct device *dev;
77 struct max77693_dev *max77693;
78 struct extcon_dev *edev;
79 int prev_cable_type;
80 int prev_cable_type_gnd;
81 int prev_chg_type;
82 int prev_button_type;
83 u8 status[2];
84
85 int irq;
86 struct work_struct irq_work;
87 struct mutex mutex;
88
89 /*
90 * Use delayed workqueue to detect cable state and then
91 * notify cable state to notifiee/platform through uevent.
92 * After completing the booting of platform, the extcon provider
93 * driver should notify cable state to upper layer.
94 */
95 struct delayed_work wq_detcable;
96
97 /* Button of dock device */
98 struct input_dev *dock;
99
100 /*
101 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
102 * h/w path of COMP2/COMN1 on CONTROL1 register.
103 */
104 int path_usb;
105 int path_uart;
106};
107
108enum max77693_muic_cable_group {
109 MAX77693_CABLE_GROUP_ADC = 0,
110 MAX77693_CABLE_GROUP_ADC_GND,
111 MAX77693_CABLE_GROUP_CHG,
112 MAX77693_CABLE_GROUP_VBVOLT,
113};
114
115enum max77693_muic_charger_type {
116 MAX77693_CHARGER_TYPE_NONE = 0,
117 MAX77693_CHARGER_TYPE_USB,
118 MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
119 MAX77693_CHARGER_TYPE_DEDICATED_CHG,
120 MAX77693_CHARGER_TYPE_APPLE_500MA,
121 MAX77693_CHARGER_TYPE_APPLE_1A_2A,
122 MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
123};
124
125/**
126 * struct max77693_muic_irq
127 * @irq: the index of irq list of MUIC device.
128 * @name: the name of irq.
129 * @virq: the virtual irq to use irq domain
130 */
131struct max77693_muic_irq {
132 unsigned int irq;
133 const char *name;
134 unsigned int virq;
135};
136
137static struct max77693_muic_irq muic_irqs[] = {
138 { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" },
139 { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" },
140 { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" },
141 { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" },
142 { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
143 { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" },
144 { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
145 { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" },
146 { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
147 { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" },
148 { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" },
149 { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" },
150 { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" },
151 { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" },
152 { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" },
153 { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" },
154};
155
156/* Define supported accessory type */
157enum max77693_muic_acc_type {
158 MAX77693_MUIC_ADC_GROUND = 0x0,
159 MAX77693_MUIC_ADC_SEND_END_BUTTON,
160 MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
161 MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
162 MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
163 MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
164 MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
165 MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
166 MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
167 MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
168 MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
169 MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
170 MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
171 MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
172 MAX77693_MUIC_ADC_RESERVED_ACC_1,
173 MAX77693_MUIC_ADC_RESERVED_ACC_2,
174 MAX77693_MUIC_ADC_RESERVED_ACC_3,
175 MAX77693_MUIC_ADC_RESERVED_ACC_4,
176 MAX77693_MUIC_ADC_RESERVED_ACC_5,
177 MAX77693_MUIC_ADC_CEA936_AUDIO,
178 MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
179 MAX77693_MUIC_ADC_TTY_CONVERTER,
180 MAX77693_MUIC_ADC_UART_CABLE,
181 MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
182 MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
183 MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
184 MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
185 MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
186 MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
187 MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
188 MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
189 MAX77693_MUIC_ADC_OPEN,
190
191 /* The below accessories have same ADC value so ADCLow and
192 ADC1K bit is used to separate specific accessory */
193 /* ADC|VBVolot|ADCLow|ADC1K| */
194 MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */
195 MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */
196 MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */
197 MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */
198 MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */
199};
200
201/*
202 * MAX77693 MUIC device support below list of accessories(external connector)
203 */
204static const unsigned int max77693_extcon_cable[] = {
205 EXTCON_USB,
206 EXTCON_USB_HOST,
207 EXTCON_CHG_USB_SDP,
208 EXTCON_CHG_USB_DCP,
209 EXTCON_CHG_USB_FAST,
210 EXTCON_CHG_USB_SLOW,
211 EXTCON_CHG_USB_CDP,
212 EXTCON_DISP_MHL,
213 EXTCON_JIG,
214 EXTCON_DOCK,
215 EXTCON_NONE,
216};
217
218/*
219 * max77693_muic_set_debounce_time - Set the debounce time of ADC
220 * @info: the instance including private data of max77693 MUIC
221 * @time: the debounce time of ADC
222 */
223static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
224 enum max77693_muic_adc_debounce_time time)
225{
226 int ret;
227
228 switch (time) {
229 case ADC_DEBOUNCE_TIME_5MS:
230 case ADC_DEBOUNCE_TIME_10MS:
231 case ADC_DEBOUNCE_TIME_25MS:
232 case ADC_DEBOUNCE_TIME_38_62MS:
233 /*
234 * Don't touch BTLDset, JIGset when you want to change adc
235 * debounce time. If it writes other than 0 to BTLDset, JIGset
236 * muic device will be reset and loose current state.
237 */
238 ret = regmap_write(info->max77693->regmap_muic,
239 MAX77693_MUIC_REG_CTRL3,
240 time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
241 if (ret) {
242 dev_err(info->dev, "failed to set ADC debounce time\n");
243 return ret;
244 }
245 break;
246 default:
247 dev_err(info->dev, "invalid ADC debounce time\n");
248 return -EINVAL;
249 }
250
251 return 0;
252};
253
254/*
255 * max77693_muic_set_path - Set hardware line according to attached cable
256 * @info: the instance including private data of max77693 MUIC
257 * @value: the path according to attached cable
258 * @attached: the state of cable (true:attached, false:detached)
259 *
260 * The max77693 MUIC device share outside H/W line among a varity of cables
261 * so, this function set internal path of H/W line according to the type of
262 * attached cable.
263 */
264static int max77693_muic_set_path(struct max77693_muic_info *info,
265 u8 val, bool attached)
266{
267 int ret = 0;
268 unsigned int ctrl1, ctrl2 = 0;
269
270 if (attached)
271 ctrl1 = val;
272 else
273 ctrl1 = MAX77693_CONTROL1_SW_OPEN;
274
275 ret = regmap_update_bits(info->max77693->regmap_muic,
276 MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
277 if (ret < 0) {
278 dev_err(info->dev, "failed to update MUIC register\n");
279 return ret;
280 }
281
282 if (attached)
283 ctrl2 |= MAX77693_CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
284 else
285 ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
286
287 ret = regmap_update_bits(info->max77693->regmap_muic,
288 MAX77693_MUIC_REG_CTRL2,
289 MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
290 ctrl2);
291 if (ret < 0) {
292 dev_err(info->dev, "failed to update MUIC register\n");
293 return ret;
294 }
295
296 dev_info(info->dev,
297 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
298 ctrl1, ctrl2, attached ? "attached" : "detached");
299
300 return 0;
301}
302
303/*
304 * max77693_muic_get_cable_type - Return cable type and check cable state
305 * @info: the instance including private data of max77693 MUIC
306 * @group: the path according to attached cable
307 * @attached: store cable state and return
308 *
309 * This function check the cable state either attached or detached,
310 * and then divide precise type of cable according to cable group.
311 * - MAX77693_CABLE_GROUP_ADC
312 * - MAX77693_CABLE_GROUP_ADC_GND
313 * - MAX77693_CABLE_GROUP_CHG
314 * - MAX77693_CABLE_GROUP_VBVOLT
315 */
316static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
317 enum max77693_muic_cable_group group, bool *attached)
318{
319 int cable_type = 0;
320 int adc;
321 int adc1k;
322 int adclow;
323 int vbvolt;
324 int chg_type;
325
326 switch (group) {
327 case MAX77693_CABLE_GROUP_ADC:
328 /*
329 * Read ADC value to check cable type and decide cable state
330 * according to cable type
331 */
332 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
333 adc >>= MAX77693_STATUS1_ADC_SHIFT;
334
335 /*
336 * Check current cable state/cable type and store cable type
337 * (info->prev_cable_type) for handling cable when cable is
338 * detached.
339 */
340 if (adc == MAX77693_MUIC_ADC_OPEN) {
341 *attached = false;
342
343 cable_type = info->prev_cable_type;
344 info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
345 } else {
346 *attached = true;
347
348 cable_type = info->prev_cable_type = adc;
349 }
350 break;
351 case MAX77693_CABLE_GROUP_ADC_GND:
352 /*
353 * Read ADC value to check cable type and decide cable state
354 * according to cable type
355 */
356 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
357 adc >>= MAX77693_STATUS1_ADC_SHIFT;
358
359 /*
360 * Check current cable state/cable type and store cable type
361 * (info->prev_cable_type/_gnd) for handling cable when cable
362 * is detached.
363 */
364 if (adc == MAX77693_MUIC_ADC_OPEN) {
365 *attached = false;
366
367 cable_type = info->prev_cable_type_gnd;
368 info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
369 } else {
370 *attached = true;
371
372 adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
373 adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
374 adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
375 adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
376
377 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
378 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
379
380 /**
381 * [0x1|VBVolt|ADCLow|ADC1K]
382 * [0x1| 0| 0| 0] USB_HOST
383 * [0x1| 1| 0| 0] USB_HSOT_VB
384 * [0x1| 0| 1| 0] Audio Video cable with load
385 * [0x1| 0| 1| 1] MHL without charging cable
386 * [0x1| 1| 1| 1] MHL with charging cable
387 */
388 cable_type = ((0x1 << 8)
389 | (vbvolt << 2)
390 | (adclow << 1)
391 | adc1k);
392
393 info->prev_cable_type = adc;
394 info->prev_cable_type_gnd = cable_type;
395 }
396
397 break;
398 case MAX77693_CABLE_GROUP_CHG:
399 /*
400 * Read charger type to check cable type and decide cable state
401 * according to type of charger cable.
402 */
403 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
404 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
405
406 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
407 *attached = false;
408
409 cable_type = info->prev_chg_type;
410 info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
411 } else {
412 *attached = true;
413
414 /*
415 * Check current cable state/cable type and store cable
416 * type(info->prev_chg_type) for handling cable when
417 * charger cable is detached.
418 */
419 cable_type = info->prev_chg_type = chg_type;
420 }
421
422 break;
423 case MAX77693_CABLE_GROUP_VBVOLT:
424 /*
425 * Read ADC value to check cable type and decide cable state
426 * according to cable type
427 */
428 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
429 adc >>= MAX77693_STATUS1_ADC_SHIFT;
430 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
431 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
432
433 if (adc == MAX77693_MUIC_ADC_OPEN
434 && chg_type == MAX77693_CHARGER_TYPE_NONE)
435 *attached = false;
436 else
437 *attached = true;
438
439 /*
440 * Read vbvolt field, if vbvolt is 1,
441 * this cable is used for charging.
442 */
443 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
444 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
445
446 cable_type = vbvolt;
447 break;
448 default:
449 dev_err(info->dev, "Unknown cable group (%d)\n", group);
450 cable_type = -EINVAL;
451 break;
452 }
453
454 return cable_type;
455}
456
457static int max77693_muic_dock_handler(struct max77693_muic_info *info,
458 int cable_type, bool attached)
459{
460 int ret = 0;
461 int vbvolt;
462 bool cable_attached;
463 unsigned int dock_id;
464
465 dev_info(info->dev,
466 "external connector is %s (adc:0x%02x)\n",
467 attached ? "attached" : "detached", cable_type);
468
469 switch (cable_type) {
470 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
471 /*
472 * Check power cable whether attached or detached state.
473 * The Dock-Smart device need surely external power supply.
474 * If power cable(USB/TA) isn't connected to Dock device,
475 * user can't use Dock-Smart for desktop mode.
476 */
477 vbvolt = max77693_muic_get_cable_type(info,
478 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
479 if (attached && !vbvolt) {
480 dev_warn(info->dev,
481 "Cannot detect external power supply\n");
482 return 0;
483 }
484
485 /*
486 * Notify Dock/MHL state.
487 * - Dock device include three type of cable which
488 * are HDMI, USB for mouse/keyboard and micro-usb port
489 * for USB/TA cable. Dock device need always exteranl
490 * power supply(USB/TA cable through micro-usb cable). Dock
491 * device support screen output of target to separate
492 * monitor and mouse/keyboard for desktop mode.
493 *
494 * Features of 'USB/TA cable with Dock device'
495 * - Support MHL
496 * - Support external output feature of audio
497 * - Support charging through micro-usb port without data
498 * connection if TA cable is connected to target.
499 * - Support charging and data connection through micro-usb port
500 * if USB cable is connected between target and host
501 * device.
502 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
503 */
504 ret = max77693_muic_set_path(info, info->path_usb, attached);
505 if (ret < 0)
506 return ret;
507
508 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
509 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
510 goto out;
511 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
512 dock_id = EXTCON_DOCK;
513 break;
514 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
515 dock_id = EXTCON_DOCK;
516 if (!attached) {
517 extcon_set_state_sync(info->edev, EXTCON_USB, false);
518 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
519 false);
520 }
521 break;
522 default:
523 dev_err(info->dev, "failed to detect %s dock device\n",
524 attached ? "attached" : "detached");
525 return -EINVAL;
526 }
527
528 /* Dock-Car/Desk/Audio, PATH:AUDIO */
529 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
530 attached);
531 if (ret < 0)
532 return ret;
533 extcon_set_state_sync(info->edev, dock_id, attached);
534
535out:
536 return 0;
537}
538
539static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
540 int button_type, bool attached)
541{
542 struct input_dev *dock = info->dock;
543 unsigned int code;
544
545 switch (button_type) {
546 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
547 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
548 /* DOCK_KEY_PREV */
549 code = KEY_PREVIOUSSONG;
550 break;
551 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
552 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
553 /* DOCK_KEY_NEXT */
554 code = KEY_NEXTSONG;
555 break;
556 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
557 /* DOCK_VOL_DOWN */
558 code = KEY_VOLUMEDOWN;
559 break;
560 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
561 /* DOCK_VOL_UP */
562 code = KEY_VOLUMEUP;
563 break;
564 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
565 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
566 /* DOCK_KEY_PLAY_PAUSE */
567 code = KEY_PLAYPAUSE;
568 break;
569 default:
570 dev_err(info->dev,
571 "failed to detect %s key (adc:0x%x)\n",
572 attached ? "pressed" : "released", button_type);
573 return -EINVAL;
574 }
575
576 input_event(dock, EV_KEY, code, attached);
577 input_sync(dock);
578
579 return 0;
580}
581
582static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
583{
584 int cable_type_gnd;
585 int ret = 0;
586 bool attached;
587
588 cable_type_gnd = max77693_muic_get_cable_type(info,
589 MAX77693_CABLE_GROUP_ADC_GND, &attached);
590
591 switch (cable_type_gnd) {
592 case MAX77693_MUIC_GND_USB_HOST:
593 case MAX77693_MUIC_GND_USB_HOST_VB:
594 /* USB_HOST, PATH: AP_USB */
595 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
596 attached);
597 if (ret < 0)
598 return ret;
599 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
600 break;
601 case MAX77693_MUIC_GND_AV_CABLE_LOAD:
602 /* Audio Video Cable with load, PATH:AUDIO */
603 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
604 attached);
605 if (ret < 0)
606 return ret;
607 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
608 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
609 attached);
610 break;
611 case MAX77693_MUIC_GND_MHL:
612 case MAX77693_MUIC_GND_MHL_VB:
613 /* MHL or MHL with USB/TA cable */
614 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
615 break;
616 default:
617 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
618 attached ? "attached" : "detached");
619 return -EINVAL;
620 }
621
622 return 0;
623}
624
625static int max77693_muic_jig_handler(struct max77693_muic_info *info,
626 int cable_type, bool attached)
627{
628 int ret = 0;
629 u8 path = MAX77693_CONTROL1_SW_OPEN;
630
631 dev_info(info->dev,
632 "external connector is %s (adc:0x%02x)\n",
633 attached ? "attached" : "detached", cable_type);
634
635 switch (cable_type) {
636 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */
637 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
638 /* PATH:AP_USB */
639 path = MAX77693_CONTROL1_SW_USB;
640 break;
641 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
642 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* ADC_JIG_UART_ON */
643 /* PATH:AP_UART */
644 path = MAX77693_CONTROL1_SW_UART;
645 break;
646 default:
647 dev_err(info->dev, "failed to detect %s jig cable\n",
648 attached ? "attached" : "detached");
649 return -EINVAL;
650 }
651
652 ret = max77693_muic_set_path(info, path, attached);
653 if (ret < 0)
654 return ret;
655
656 extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
657
658 return 0;
659}
660
661static int max77693_muic_adc_handler(struct max77693_muic_info *info)
662{
663 int cable_type;
664 int button_type;
665 bool attached;
666 int ret = 0;
667
668 /* Check accessory state which is either detached or attached */
669 cable_type = max77693_muic_get_cable_type(info,
670 MAX77693_CABLE_GROUP_ADC, &attached);
671
672 dev_info(info->dev,
673 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
674 attached ? "attached" : "detached", cable_type,
675 info->prev_cable_type);
676
677 switch (cable_type) {
678 case MAX77693_MUIC_ADC_GROUND:
679 /* USB_HOST/MHL/Audio */
680 max77693_muic_adc_ground_handler(info);
681 break;
682 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
683 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
684 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
685 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
686 /* JIG */
687 ret = max77693_muic_jig_handler(info, cable_type, attached);
688 if (ret < 0)
689 return ret;
690 break;
691 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
692 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
693 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
694 /*
695 * DOCK device
696 *
697 * The MAX77693 MUIC device can detect total 34 cable type
698 * except of charger cable and MUIC device didn't define
699 * specfic role of cable in the range of from 0x01 to 0x12
700 * of ADC value. So, can use/define cable with no role according
701 * to schema of hardware board.
702 */
703 ret = max77693_muic_dock_handler(info, cable_type, attached);
704 if (ret < 0)
705 return ret;
706 break;
707 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */
708 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */
709 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */
710 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */
711 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */
712 /*
713 * Button of DOCK device
714 * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
715 *
716 * The MAX77693 MUIC device can detect total 34 cable type
717 * except of charger cable and MUIC device didn't define
718 * specfic role of cable in the range of from 0x01 to 0x12
719 * of ADC value. So, can use/define cable with no role according
720 * to schema of hardware board.
721 */
722 if (attached)
723 button_type = info->prev_button_type = cable_type;
724 else
725 button_type = info->prev_button_type;
726
727 ret = max77693_muic_dock_button_handler(info, button_type,
728 attached);
729 if (ret < 0)
730 return ret;
731 break;
732 case MAX77693_MUIC_ADC_SEND_END_BUTTON:
733 case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
734 case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
735 case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
736 case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
737 case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
738 case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
739 case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
740 case MAX77693_MUIC_ADC_RESERVED_ACC_1:
741 case MAX77693_MUIC_ADC_RESERVED_ACC_2:
742 case MAX77693_MUIC_ADC_RESERVED_ACC_4:
743 case MAX77693_MUIC_ADC_RESERVED_ACC_5:
744 case MAX77693_MUIC_ADC_CEA936_AUDIO:
745 case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
746 case MAX77693_MUIC_ADC_TTY_CONVERTER:
747 case MAX77693_MUIC_ADC_UART_CABLE:
748 case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
749 case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
750 /*
751 * This accessory isn't used in general case if it is specially
752 * needed to detect additional accessory, should implement
753 * proper operation when this accessory is attached/detached.
754 */
755 dev_info(info->dev,
756 "accessory is %s but it isn't used (adc:0x%x)\n",
757 attached ? "attached" : "detached", cable_type);
758 return -EAGAIN;
759 default:
760 dev_err(info->dev,
761 "failed to detect %s accessory (adc:0x%x)\n",
762 attached ? "attached" : "detached", cable_type);
763 return -EINVAL;
764 }
765
766 return 0;
767}
768
769static int max77693_muic_chg_handler(struct max77693_muic_info *info)
770{
771 int chg_type;
772 int cable_type_gnd;
773 int cable_type;
774 bool attached;
775 bool cable_attached;
776 int ret = 0;
777
778 chg_type = max77693_muic_get_cable_type(info,
779 MAX77693_CABLE_GROUP_CHG, &attached);
780
781 dev_info(info->dev,
782 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
783 attached ? "attached" : "detached",
784 chg_type, info->prev_chg_type);
785
786 switch (chg_type) {
787 case MAX77693_CHARGER_TYPE_USB:
788 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
789 case MAX77693_CHARGER_TYPE_NONE:
790 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
791 cable_type_gnd = max77693_muic_get_cable_type(info,
792 MAX77693_CABLE_GROUP_ADC_GND,
793 &cable_attached);
794 switch (cable_type_gnd) {
795 case MAX77693_MUIC_GND_MHL:
796 case MAX77693_MUIC_GND_MHL_VB:
797 /*
798 * MHL cable with USB/TA cable
799 * - MHL cable include two port(HDMI line and separate
800 * micro-usb port. When the target connect MHL cable,
801 * extcon driver check whether USB/TA cable is
802 * connected. If USB/TA cable is connected, extcon
803 * driver notify state to notifiee for charging battery.
804 *
805 * Features of 'USB/TA with MHL cable'
806 * - Support MHL
807 * - Support charging through micro-usb port without
808 * data connection
809 */
810 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
811 attached);
812 if (!cable_attached)
813 extcon_set_state_sync(info->edev,
814 EXTCON_DISP_MHL, cable_attached);
815 break;
816 }
817
818 /* Check MAX77693_CABLE_GROUP_ADC type */
819 cable_type = max77693_muic_get_cable_type(info,
820 MAX77693_CABLE_GROUP_ADC,
821 &cable_attached);
822 switch (cable_type) {
823 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
824 /*
825 * Dock-Audio device with USB/TA cable
826 * - Dock device include two port(Dock-Audio and micro-
827 * usb port). When the target connect Dock-Audio device,
828 * extcon driver check whether USB/TA cable is connected
829 * or not. If USB/TA cable is connected, extcon driver
830 * notify state to notifiee for charging battery.
831 *
832 * Features of 'USB/TA cable with Dock-Audio device'
833 * - Support external output feature of audio.
834 * - Support charging through micro-usb port without
835 * data connection.
836 */
837 extcon_set_state_sync(info->edev, EXTCON_USB,
838 attached);
839 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
840 attached);
841
842 if (!cable_attached)
843 extcon_set_state_sync(info->edev, EXTCON_DOCK,
844 cable_attached);
845 break;
846 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
847 /*
848 * Dock-Smart device with USB/TA cable
849 * - Dock-Desk device include three type of cable which
850 * are HDMI, USB for mouse/keyboard and micro-usb port
851 * for USB/TA cable. Dock-Smart device need always
852 * exteranl power supply(USB/TA cable through micro-usb
853 * cable). Dock-Smart device support screen output of
854 * target to separate monitor and mouse/keyboard for
855 * desktop mode.
856 *
857 * Features of 'USB/TA cable with Dock-Smart device'
858 * - Support MHL
859 * - Support external output feature of audio
860 * - Support charging through micro-usb port without
861 * data connection if TA cable is connected to target.
862 * - Support charging and data connection through micro-
863 * usb port if USB cable is connected between target
864 * and host device
865 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
866 */
867 ret = max77693_muic_set_path(info, info->path_usb,
868 attached);
869 if (ret < 0)
870 return ret;
871
872 extcon_set_state_sync(info->edev, EXTCON_DOCK,
873 attached);
874 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
875 attached);
876 break;
877 }
878
879 /* Check MAX77693_CABLE_GROUP_CHG type */
880 switch (chg_type) {
881 case MAX77693_CHARGER_TYPE_NONE:
882 /*
883 * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
884 * cable is attached, muic device happen below two irq.
885 * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
886 * MHL/Dock-Audio.
887 * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
888 * USB/TA cable connected to MHL or Dock-Audio.
889 * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
890 * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
891 *
892 * If user attach MHL (with USB/TA cable and immediately
893 * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
894 * _INT2_CHGTYP irq is happened, USB/TA cable remain
895 * connected state to target. But USB/TA cable isn't
896 * connected to target. The user be face with unusual
897 * action. So, driver should check this situation in
898 * spite of, that previous charger type is N/A.
899 */
900 break;
901 case MAX77693_CHARGER_TYPE_USB:
902 /* Only USB cable, PATH:AP_USB */
903 ret = max77693_muic_set_path(info, info->path_usb,
904 attached);
905 if (ret < 0)
906 return ret;
907
908 extcon_set_state_sync(info->edev, EXTCON_USB,
909 attached);
910 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
911 attached);
912 break;
913 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
914 /* Only TA cable */
915 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
916 attached);
917 break;
918 }
919 break;
920 case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
921 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
922 attached);
923 break;
924 case MAX77693_CHARGER_TYPE_APPLE_500MA:
925 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
926 attached);
927 break;
928 case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
929 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
930 attached);
931 break;
932 case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
933 break;
934 default:
935 dev_err(info->dev,
936 "failed to detect %s accessory (chg_type:0x%x)\n",
937 attached ? "attached" : "detached", chg_type);
938 return -EINVAL;
939 }
940
941 return 0;
942}
943
944static void max77693_muic_irq_work(struct work_struct *work)
945{
946 struct max77693_muic_info *info = container_of(work,
947 struct max77693_muic_info, irq_work);
948 int irq_type = -1;
949 int i, ret = 0;
950
951 if (!info->edev)
952 return;
953
954 mutex_lock(&info->mutex);
955
956 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
957 if (info->irq == muic_irqs[i].virq)
958 irq_type = muic_irqs[i].irq;
959
960 ret = regmap_bulk_read(info->max77693->regmap_muic,
961 MAX77693_MUIC_REG_STATUS1, info->status, 2);
962 if (ret) {
963 dev_err(info->dev, "failed to read MUIC register\n");
964 mutex_unlock(&info->mutex);
965 return;
966 }
967
968 switch (irq_type) {
969 case MAX77693_MUIC_IRQ_INT1_ADC:
970 case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
971 case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
972 case MAX77693_MUIC_IRQ_INT1_ADC1K:
973 /* Handle all of accessory except for
974 type of charger accessory */
975 ret = max77693_muic_adc_handler(info);
976 break;
977 case MAX77693_MUIC_IRQ_INT2_CHGTYP:
978 case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
979 case MAX77693_MUIC_IRQ_INT2_DCDTMR:
980 case MAX77693_MUIC_IRQ_INT2_DXOVP:
981 case MAX77693_MUIC_IRQ_INT2_VBVOLT:
982 case MAX77693_MUIC_IRQ_INT2_VIDRM:
983 /* Handle charger accessory */
984 ret = max77693_muic_chg_handler(info);
985 break;
986 case MAX77693_MUIC_IRQ_INT3_EOC:
987 case MAX77693_MUIC_IRQ_INT3_CGMBC:
988 case MAX77693_MUIC_IRQ_INT3_OVP:
989 case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
990 case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
991 case MAX77693_MUIC_IRQ_INT3_BAT_DET:
992 break;
993 default:
994 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
995 irq_type);
996 mutex_unlock(&info->mutex);
997 return;
998 }
999
1000 if (ret < 0)
1001 dev_err(info->dev, "failed to handle MUIC interrupt\n");
1002
1003 mutex_unlock(&info->mutex);
1004}
1005
1006static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1007{
1008 struct max77693_muic_info *info = data;
1009
1010 info->irq = irq;
1011 schedule_work(&info->irq_work);
1012
1013 return IRQ_HANDLED;
1014}
1015
1016static const struct regmap_config max77693_muic_regmap_config = {
1017 .reg_bits = 8,
1018 .val_bits = 8,
1019};
1020
1021static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1022{
1023 int ret = 0;
1024 int adc;
1025 int chg_type;
1026 bool attached;
1027
1028 mutex_lock(&info->mutex);
1029
1030 /* Read STATUSx register to detect accessory */
1031 ret = regmap_bulk_read(info->max77693->regmap_muic,
1032 MAX77693_MUIC_REG_STATUS1, info->status, 2);
1033 if (ret) {
1034 dev_err(info->dev, "failed to read MUIC register\n");
1035 mutex_unlock(&info->mutex);
1036 return ret;
1037 }
1038
1039 adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1040 &attached);
1041 if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1042 ret = max77693_muic_adc_handler(info);
1043 if (ret < 0) {
1044 dev_err(info->dev, "Cannot detect accessory\n");
1045 mutex_unlock(&info->mutex);
1046 return ret;
1047 }
1048 }
1049
1050 chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1051 &attached);
1052 if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1053 ret = max77693_muic_chg_handler(info);
1054 if (ret < 0) {
1055 dev_err(info->dev, "Cannot detect charger accessory\n");
1056 mutex_unlock(&info->mutex);
1057 return ret;
1058 }
1059 }
1060
1061 mutex_unlock(&info->mutex);
1062
1063 return 0;
1064}
1065
1066static void max77693_muic_detect_cable_wq(struct work_struct *work)
1067{
1068 struct max77693_muic_info *info = container_of(to_delayed_work(work),
1069 struct max77693_muic_info, wq_detcable);
1070
1071 max77693_muic_detect_accessory(info);
1072}
1073
1074static int max77693_muic_probe(struct platform_device *pdev)
1075{
1076 struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1077 struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1078 struct max77693_muic_info *info;
1079 struct max77693_reg_data *init_data;
1080 int num_init_data;
1081 int delay_jiffies;
1082 int ret;
1083 int i;
1084 unsigned int id;
1085
1086 info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1087 GFP_KERNEL);
1088 if (!info)
1089 return -ENOMEM;
1090
1091 info->dev = &pdev->dev;
1092 info->max77693 = max77693;
1093 if (info->max77693->regmap_muic) {
1094 dev_dbg(&pdev->dev, "allocate register map\n");
1095 } else {
1096 info->max77693->regmap_muic = devm_regmap_init_i2c(
1097 info->max77693->i2c_muic,
1098 &max77693_muic_regmap_config);
1099 if (IS_ERR(info->max77693->regmap_muic)) {
1100 ret = PTR_ERR(info->max77693->regmap_muic);
1101 dev_err(max77693->dev,
1102 "failed to allocate register map: %d\n", ret);
1103 return ret;
1104 }
1105 }
1106
1107 /* Register input device for button of dock device */
1108 info->dock = devm_input_allocate_device(&pdev->dev);
1109 if (!info->dock) {
1110 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1111 return -ENOMEM;
1112 }
1113 info->dock->name = "max77693-muic/dock";
1114 info->dock->phys = "max77693-muic/extcon";
1115 info->dock->dev.parent = &pdev->dev;
1116
1117 __set_bit(EV_REP, info->dock->evbit);
1118
1119 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1120 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1121 input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1122 input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1123 input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1124
1125 ret = input_register_device(info->dock);
1126 if (ret < 0) {
1127 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1128 ret);
1129 return ret;
1130 }
1131
1132 platform_set_drvdata(pdev, info);
1133 mutex_init(&info->mutex);
1134
1135 INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1136
1137 /* Support irq domain for MAX77693 MUIC device */
1138 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1139 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1140 int virq;
1141
1142 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1143 muic_irq->irq);
1144 if (virq <= 0)
1145 return -EINVAL;
1146 muic_irq->virq = virq;
1147
1148 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1149 max77693_muic_irq_handler,
1150 IRQF_NO_SUSPEND,
1151 muic_irq->name, info);
1152 if (ret) {
1153 dev_err(&pdev->dev,
1154 "failed: irq request (IRQ: %d, error :%d)\n",
1155 muic_irq->irq, ret);
1156 return ret;
1157 }
1158 }
1159
1160 /* Initialize extcon device */
1161 info->edev = devm_extcon_dev_allocate(&pdev->dev,
1162 max77693_extcon_cable);
1163 if (IS_ERR(info->edev)) {
1164 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1165 return -ENOMEM;
1166 }
1167
1168 ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1169 if (ret) {
1170 dev_err(&pdev->dev, "failed to register extcon device\n");
1171 return ret;
1172 }
1173
1174 /* Initialize MUIC register by using platform data or default data */
1175 if (pdata && pdata->muic_data) {
1176 init_data = pdata->muic_data->init_data;
1177 num_init_data = pdata->muic_data->num_init_data;
1178 } else {
1179 init_data = default_init_data;
1180 num_init_data = ARRAY_SIZE(default_init_data);
1181 }
1182
1183 for (i = 0; i < num_init_data; i++) {
1184 regmap_write(info->max77693->regmap_muic,
1185 init_data[i].addr,
1186 init_data[i].data);
1187 }
1188
1189 if (pdata && pdata->muic_data) {
1190 struct max77693_muic_platform_data *muic_pdata
1191 = pdata->muic_data;
1192
1193 /*
1194 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1195 * h/w path of COMP2/COMN1 on CONTROL1 register.
1196 */
1197 if (muic_pdata->path_uart)
1198 info->path_uart = muic_pdata->path_uart;
1199 else
1200 info->path_uart = MAX77693_CONTROL1_SW_UART;
1201
1202 if (muic_pdata->path_usb)
1203 info->path_usb = muic_pdata->path_usb;
1204 else
1205 info->path_usb = MAX77693_CONTROL1_SW_USB;
1206
1207 /*
1208 * Default delay time for detecting cable state
1209 * after certain time.
1210 */
1211 if (muic_pdata->detcable_delay_ms)
1212 delay_jiffies =
1213 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1214 else
1215 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1216 } else {
1217 info->path_usb = MAX77693_CONTROL1_SW_USB;
1218 info->path_uart = MAX77693_CONTROL1_SW_UART;
1219 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1220 }
1221
1222 /* Set initial path for UART */
1223 max77693_muic_set_path(info, info->path_uart, true);
1224
1225 /* Check revision number of MUIC device*/
1226 ret = regmap_read(info->max77693->regmap_muic,
1227 MAX77693_MUIC_REG_ID, &id);
1228 if (ret < 0) {
1229 dev_err(&pdev->dev, "failed to read revision number\n");
1230 return ret;
1231 }
1232 dev_info(info->dev, "device ID : 0x%x\n", id);
1233
1234 /* Set ADC debounce time */
1235 max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1236
1237 /*
1238 * Detect accessory after completing the initialization of platform
1239 *
1240 * - Use delayed workqueue to detect cable state and then
1241 * notify cable state to notifiee/platform through uevent.
1242 * After completing the booting of platform, the extcon provider
1243 * driver should notify cable state to upper layer.
1244 */
1245 INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1246 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1247 delay_jiffies);
1248
1249 return ret;
1250}
1251
1252static int max77693_muic_remove(struct platform_device *pdev)
1253{
1254 struct max77693_muic_info *info = platform_get_drvdata(pdev);
1255
1256 cancel_work_sync(&info->irq_work);
1257 input_unregister_device(info->dock);
1258
1259 return 0;
1260}
1261
1262static struct platform_driver max77693_muic_driver = {
1263 .driver = {
1264 .name = DEV_NAME,
1265 },
1266 .probe = max77693_muic_probe,
1267 .remove = max77693_muic_remove,
1268};
1269
1270module_platform_driver(max77693_muic_driver);
1271
1272MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1273MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1274MODULE_LICENSE("GPL");
1275MODULE_ALIAS("platform:extcon-max77693");