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/kernel.h>
9 #include <linux/module.h>
10 #include <linux/i2c.h>
11 #include <linux/slab.h>
12 #include <linux/input.h>
13 #include <linux/interrupt.h>
14 #include <linux/err.h>
15 #include <linux/platform_device.h>
16 #include <linux/mfd/max77693.h>
17 #include <linux/mfd/max77693-common.h>
18 #include <linux/mfd/max77693-private.h>
19 #include <linux/extcon-provider.h>
20 #include <linux/regmap.h>
21 #include <linux/irqdomain.h>
22 
23 #define	DEV_NAME			"max77693-muic"
24 #define	DELAY_MS_DEFAULT		20000		/* unit: millisecond */
25 
26 /*
27  * Default value of MAX77693 register to bring up MUIC device.
28  * If user don't set some initial value for MUIC device through platform data,
29  * extcon-max77693 driver use 'default_init_data' to bring up base operation
30  * of MAX77693 MUIC device.
31  */
32 static struct max77693_reg_data default_init_data[] = {
33 	{
34 		/* STATUS2 - [3]ChgDetRun */
35 		.addr = MAX77693_MUIC_REG_STATUS2,
36 		.data = MAX77693_STATUS2_CHGDETRUN_MASK,
37 	}, {
38 		/* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
39 		.addr = MAX77693_MUIC_REG_INTMASK1,
40 		.data = INTMASK1_ADC1K_MASK
41 			| INTMASK1_ADC_MASK,
42 	}, {
43 		/* INTMASK2 - Unmask [0]ChgTypM */
44 		.addr = MAX77693_MUIC_REG_INTMASK2,
45 		.data = INTMASK2_CHGTYP_MASK,
46 	}, {
47 		/* INTMASK3 - Mask all of interrupts */
48 		.addr = MAX77693_MUIC_REG_INTMASK3,
49 		.data = 0x0,
50 	}, {
51 		/* CDETCTRL2 */
52 		.addr = MAX77693_MUIC_REG_CDETCTRL2,
53 		.data = CDETCTRL2_VIDRMEN_MASK
54 			| CDETCTRL2_DXOVPEN_MASK,
55 	},
56 };
57 
58 enum max77693_muic_adc_debounce_time {
59 	ADC_DEBOUNCE_TIME_5MS = 0,
60 	ADC_DEBOUNCE_TIME_10MS,
61 	ADC_DEBOUNCE_TIME_25MS,
62 	ADC_DEBOUNCE_TIME_38_62MS,
63 };
64 
65 struct max77693_muic_info {
66 	struct device *dev;
67 	struct max77693_dev *max77693;
68 	struct extcon_dev *edev;
69 	int prev_cable_type;
70 	int prev_cable_type_gnd;
71 	int prev_chg_type;
72 	int prev_button_type;
73 	u8 status[2];
74 
75 	int irq;
76 	struct work_struct irq_work;
77 	struct mutex mutex;
78 
79 	/*
80 	 * Use delayed workqueue to detect cable state and then
81 	 * notify cable state to notifiee/platform through uevent.
82 	 * After completing the booting of platform, the extcon provider
83 	 * driver should notify cable state to upper layer.
84 	 */
85 	struct delayed_work wq_detcable;
86 
87 	/* Button of dock device */
88 	struct input_dev *dock;
89 
90 	/*
91 	 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
92 	 * h/w path of COMP2/COMN1 on CONTROL1 register.
93 	 */
94 	int path_usb;
95 	int path_uart;
96 };
97 
98 enum max77693_muic_cable_group {
99 	MAX77693_CABLE_GROUP_ADC = 0,
100 	MAX77693_CABLE_GROUP_ADC_GND,
101 	MAX77693_CABLE_GROUP_CHG,
102 	MAX77693_CABLE_GROUP_VBVOLT,
103 };
104 
105 enum max77693_muic_charger_type {
106 	MAX77693_CHARGER_TYPE_NONE = 0,
107 	MAX77693_CHARGER_TYPE_USB,
108 	MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
109 	MAX77693_CHARGER_TYPE_DEDICATED_CHG,
110 	MAX77693_CHARGER_TYPE_APPLE_500MA,
111 	MAX77693_CHARGER_TYPE_APPLE_1A_2A,
112 	MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
113 };
114 
115 /**
116  * struct max77693_muic_irq
117  * @irq: the index of irq list of MUIC device.
118  * @name: the name of irq.
119  * @virq: the virtual irq to use irq domain
120  */
121 struct max77693_muic_irq {
122 	unsigned int irq;
123 	const char *name;
124 	unsigned int virq;
125 };
126 
127 static struct max77693_muic_irq muic_irqs[] = {
128 	{ MAX77693_MUIC_IRQ_INT1_ADC,		"muic-ADC" },
129 	{ MAX77693_MUIC_IRQ_INT1_ADC_LOW,	"muic-ADCLOW" },
130 	{ MAX77693_MUIC_IRQ_INT1_ADC_ERR,	"muic-ADCError" },
131 	{ MAX77693_MUIC_IRQ_INT1_ADC1K,		"muic-ADC1K" },
132 	{ MAX77693_MUIC_IRQ_INT2_CHGTYP,	"muic-CHGTYP" },
133 	{ MAX77693_MUIC_IRQ_INT2_CHGDETREUN,	"muic-CHGDETREUN" },
134 	{ MAX77693_MUIC_IRQ_INT2_DCDTMR,	"muic-DCDTMR" },
135 	{ MAX77693_MUIC_IRQ_INT2_DXOVP,		"muic-DXOVP" },
136 	{ MAX77693_MUIC_IRQ_INT2_VBVOLT,	"muic-VBVOLT" },
137 	{ MAX77693_MUIC_IRQ_INT2_VIDRM,		"muic-VIDRM" },
138 	{ MAX77693_MUIC_IRQ_INT3_EOC,		"muic-EOC" },
139 	{ MAX77693_MUIC_IRQ_INT3_CGMBC,		"muic-CGMBC" },
140 	{ MAX77693_MUIC_IRQ_INT3_OVP,		"muic-OVP" },
141 	{ MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,	"muic-MBCCHG_ERR" },
142 	{ MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,	"muic-CHG_ENABLED" },
143 	{ MAX77693_MUIC_IRQ_INT3_BAT_DET,	"muic-BAT_DET" },
144 };
145 
146 /* Define supported accessory type */
147 enum max77693_muic_acc_type {
148 	MAX77693_MUIC_ADC_GROUND = 0x0,
149 	MAX77693_MUIC_ADC_SEND_END_BUTTON,
150 	MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
151 	MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
152 	MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
153 	MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
154 	MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
155 	MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
156 	MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
157 	MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
158 	MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
159 	MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
160 	MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
161 	MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
162 	MAX77693_MUIC_ADC_RESERVED_ACC_1,
163 	MAX77693_MUIC_ADC_RESERVED_ACC_2,
164 	MAX77693_MUIC_ADC_RESERVED_ACC_3,
165 	MAX77693_MUIC_ADC_RESERVED_ACC_4,
166 	MAX77693_MUIC_ADC_RESERVED_ACC_5,
167 	MAX77693_MUIC_ADC_CEA936_AUDIO,
168 	MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
169 	MAX77693_MUIC_ADC_TTY_CONVERTER,
170 	MAX77693_MUIC_ADC_UART_CABLE,
171 	MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
172 	MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
173 	MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
174 	MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
175 	MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
176 	MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
177 	MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
178 	MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
179 	MAX77693_MUIC_ADC_OPEN,
180 
181 	/*
182 	 * The below accessories have same ADC value so ADCLow and
183 	 * ADC1K bit is used to separate specific accessory.
184 	 */
185 						/* ADC|VBVolot|ADCLow|ADC1K| */
186 	MAX77693_MUIC_GND_USB_HOST = 0x100,	/* 0x0|      0|     0|    0| */
187 	MAX77693_MUIC_GND_USB_HOST_VB = 0x104,	/* 0x0|      1|     0|    0| */
188 	MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0|      0|     1|    0| */
189 	MAX77693_MUIC_GND_MHL = 0x103,		/* 0x0|      0|     1|    1| */
190 	MAX77693_MUIC_GND_MHL_VB = 0x107,	/* 0x0|      1|     1|    1| */
191 };
192 
193 /*
194  * MAX77693 MUIC device support below list of accessories(external connector)
195  */
196 static const unsigned int max77693_extcon_cable[] = {
197 	EXTCON_USB,
198 	EXTCON_USB_HOST,
199 	EXTCON_CHG_USB_SDP,
200 	EXTCON_CHG_USB_DCP,
201 	EXTCON_CHG_USB_FAST,
202 	EXTCON_CHG_USB_SLOW,
203 	EXTCON_CHG_USB_CDP,
204 	EXTCON_DISP_MHL,
205 	EXTCON_JIG,
206 	EXTCON_DOCK,
207 	EXTCON_NONE,
208 };
209 
210 /*
211  * max77693_muic_set_debounce_time - Set the debounce time of ADC
212  * @info: the instance including private data of max77693 MUIC
213  * @time: the debounce time of ADC
214  */
215 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
216 		enum max77693_muic_adc_debounce_time time)
217 {
218 	int ret;
219 
220 	switch (time) {
221 	case ADC_DEBOUNCE_TIME_5MS:
222 	case ADC_DEBOUNCE_TIME_10MS:
223 	case ADC_DEBOUNCE_TIME_25MS:
224 	case ADC_DEBOUNCE_TIME_38_62MS:
225 		/*
226 		 * Don't touch BTLDset, JIGset when you want to change adc
227 		 * debounce time. If it writes other than 0 to BTLDset, JIGset
228 		 * muic device will be reset and loose current state.
229 		 */
230 		ret = regmap_write(info->max77693->regmap_muic,
231 				  MAX77693_MUIC_REG_CTRL3,
232 				  time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
233 		if (ret) {
234 			dev_err(info->dev, "failed to set ADC debounce time\n");
235 			return ret;
236 		}
237 		break;
238 	default:
239 		dev_err(info->dev, "invalid ADC debounce time\n");
240 		return -EINVAL;
241 	}
242 
243 	return 0;
244 };
245 
246 /*
247  * max77693_muic_set_path - Set hardware line according to attached cable
248  * @info: the instance including private data of max77693 MUIC
249  * @value: the path according to attached cable
250  * @attached: the state of cable (true:attached, false:detached)
251  *
252  * The max77693 MUIC device share outside H/W line among a varity of cables
253  * so, this function set internal path of H/W line according to the type of
254  * attached cable.
255  */
256 static int max77693_muic_set_path(struct max77693_muic_info *info,
257 		u8 val, bool attached)
258 {
259 	int ret;
260 	unsigned int ctrl1, ctrl2 = 0;
261 
262 	if (attached)
263 		ctrl1 = val;
264 	else
265 		ctrl1 = MAX77693_CONTROL1_SW_OPEN;
266 
267 	ret = regmap_update_bits(info->max77693->regmap_muic,
268 			MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
269 	if (ret < 0) {
270 		dev_err(info->dev, "failed to update MUIC register\n");
271 		return ret;
272 	}
273 
274 	if (attached)
275 		ctrl2 |= MAX77693_CONTROL2_CPEN_MASK;	/* LowPwr=0, CPEn=1 */
276 	else
277 		ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK;	/* LowPwr=1, CPEn=0 */
278 
279 	ret = regmap_update_bits(info->max77693->regmap_muic,
280 			MAX77693_MUIC_REG_CTRL2,
281 			MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
282 			ctrl2);
283 	if (ret < 0) {
284 		dev_err(info->dev, "failed to update MUIC register\n");
285 		return ret;
286 	}
287 
288 	dev_info(info->dev,
289 		"CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
290 		ctrl1, ctrl2, attached ? "attached" : "detached");
291 
292 	return 0;
293 }
294 
295 /*
296  * max77693_muic_get_cable_type - Return cable type and check cable state
297  * @info: the instance including private data of max77693 MUIC
298  * @group: the path according to attached cable
299  * @attached: store cable state and return
300  *
301  * This function check the cable state either attached or detached,
302  * and then divide precise type of cable according to cable group.
303  *	- MAX77693_CABLE_GROUP_ADC
304  *	- MAX77693_CABLE_GROUP_ADC_GND
305  *	- MAX77693_CABLE_GROUP_CHG
306  *	- MAX77693_CABLE_GROUP_VBVOLT
307  */
308 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
309 		enum max77693_muic_cable_group group, bool *attached)
310 {
311 	int cable_type = 0;
312 	int adc;
313 	int adc1k;
314 	int adclow;
315 	int vbvolt;
316 	int chg_type;
317 
318 	switch (group) {
319 	case MAX77693_CABLE_GROUP_ADC:
320 		/*
321 		 * Read ADC value to check cable type and decide cable state
322 		 * according to cable type
323 		 */
324 		adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
325 		adc >>= MAX77693_STATUS1_ADC_SHIFT;
326 
327 		/*
328 		 * Check current cable state/cable type and store cable type
329 		 * (info->prev_cable_type) for handling cable when cable is
330 		 * detached.
331 		 */
332 		if (adc == MAX77693_MUIC_ADC_OPEN) {
333 			*attached = false;
334 
335 			cable_type = info->prev_cable_type;
336 			info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
337 		} else {
338 			*attached = true;
339 
340 			cable_type = info->prev_cable_type = adc;
341 		}
342 		break;
343 	case MAX77693_CABLE_GROUP_ADC_GND:
344 		/*
345 		 * Read ADC value to check cable type and decide cable state
346 		 * according to cable type
347 		 */
348 		adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
349 		adc >>= MAX77693_STATUS1_ADC_SHIFT;
350 
351 		/*
352 		 * Check current cable state/cable type and store cable type
353 		 * (info->prev_cable_type/_gnd) for handling cable when cable
354 		 * is detached.
355 		 */
356 		if (adc == MAX77693_MUIC_ADC_OPEN) {
357 			*attached = false;
358 
359 			cable_type = info->prev_cable_type_gnd;
360 			info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
361 		} else {
362 			*attached = true;
363 
364 			adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
365 			adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
366 			adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
367 			adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
368 
369 			vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
370 			vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
371 
372 			/**
373 			 * [0x1|VBVolt|ADCLow|ADC1K]
374 			 * [0x1|     0|     0|    0] USB_HOST
375 			 * [0x1|     1|     0|    0] USB_HSOT_VB
376 			 * [0x1|     0|     1|    0] Audio Video cable with load
377 			 * [0x1|     0|     1|    1] MHL without charging cable
378 			 * [0x1|     1|     1|    1] MHL with charging cable
379 			 */
380 			cable_type = ((0x1 << 8)
381 					| (vbvolt << 2)
382 					| (adclow << 1)
383 					| adc1k);
384 
385 			info->prev_cable_type = adc;
386 			info->prev_cable_type_gnd = cable_type;
387 		}
388 
389 		break;
390 	case MAX77693_CABLE_GROUP_CHG:
391 		/*
392 		 * Read charger type to check cable type and decide cable state
393 		 * according to type of charger cable.
394 		 */
395 		chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
396 		chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
397 
398 		if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
399 			*attached = false;
400 
401 			cable_type = info->prev_chg_type;
402 			info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
403 		} else {
404 			*attached = true;
405 
406 			/*
407 			 * Check current cable state/cable type and store cable
408 			 * type(info->prev_chg_type) for handling cable when
409 			 * charger cable is detached.
410 			 */
411 			cable_type = info->prev_chg_type = chg_type;
412 		}
413 
414 		break;
415 	case MAX77693_CABLE_GROUP_VBVOLT:
416 		/*
417 		 * Read ADC value to check cable type and decide cable state
418 		 * according to cable type
419 		 */
420 		adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
421 		adc >>= MAX77693_STATUS1_ADC_SHIFT;
422 		chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
423 		chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
424 
425 		if (adc == MAX77693_MUIC_ADC_OPEN
426 				&& chg_type == MAX77693_CHARGER_TYPE_NONE)
427 			*attached = false;
428 		else
429 			*attached = true;
430 
431 		/*
432 		 * Read vbvolt field, if vbvolt is 1,
433 		 * this cable is used for charging.
434 		 */
435 		vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
436 		vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
437 
438 		cable_type = vbvolt;
439 		break;
440 	default:
441 		dev_err(info->dev, "Unknown cable group (%d)\n", group);
442 		cable_type = -EINVAL;
443 		break;
444 	}
445 
446 	return cable_type;
447 }
448 
449 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
450 		int cable_type, bool attached)
451 {
452 	int ret = 0;
453 	int vbvolt;
454 	bool cable_attached;
455 	unsigned int dock_id;
456 
457 	dev_info(info->dev,
458 		"external connector is %s (adc:0x%02x)\n",
459 		attached ? "attached" : "detached", cable_type);
460 
461 	switch (cable_type) {
462 	case MAX77693_MUIC_ADC_RESERVED_ACC_3:		/* Dock-Smart */
463 		/*
464 		 * Check power cable whether attached or detached state.
465 		 * The Dock-Smart device need surely external power supply.
466 		 * If power cable(USB/TA) isn't connected to Dock device,
467 		 * user can't use Dock-Smart for desktop mode.
468 		 */
469 		vbvolt = max77693_muic_get_cable_type(info,
470 				MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
471 		if (attached && !vbvolt) {
472 			dev_warn(info->dev,
473 				"Cannot detect external power supply\n");
474 			return 0;
475 		}
476 
477 		/*
478 		 * Notify Dock/MHL state.
479 		 * - Dock device include three type of cable which
480 		 * are HDMI, USB for mouse/keyboard and micro-usb port
481 		 * for USB/TA cable. Dock device need always exteranl
482 		 * power supply(USB/TA cable through micro-usb cable). Dock
483 		 * device support screen output of target to separate
484 		 * monitor and mouse/keyboard for desktop mode.
485 		 *
486 		 * Features of 'USB/TA cable with Dock device'
487 		 * - Support MHL
488 		 * - Support external output feature of audio
489 		 * - Support charging through micro-usb port without data
490 		 *	     connection if TA cable is connected to target.
491 		 * - Support charging and data connection through micro-usb port
492 		 *           if USB cable is connected between target and host
493 		 *	     device.
494 		 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
495 		 */
496 		ret = max77693_muic_set_path(info, info->path_usb, attached);
497 		if (ret < 0)
498 			return ret;
499 
500 		extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
501 		extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
502 		goto out;
503 	case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:	/* Dock-Desk */
504 		dock_id = EXTCON_DOCK;
505 		break;
506 	case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:		/* Dock-Audio */
507 		dock_id = EXTCON_DOCK;
508 		if (!attached) {
509 			extcon_set_state_sync(info->edev, EXTCON_USB, false);
510 			extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
511 						false);
512 		}
513 		break;
514 	default:
515 		dev_err(info->dev, "failed to detect %s dock device\n",
516 			attached ? "attached" : "detached");
517 		return -EINVAL;
518 	}
519 
520 	/* Dock-Car/Desk/Audio, PATH:AUDIO */
521 	ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
522 					attached);
523 	if (ret < 0)
524 		return ret;
525 	extcon_set_state_sync(info->edev, dock_id, attached);
526 
527 out:
528 	return 0;
529 }
530 
531 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
532 		int button_type, bool attached)
533 {
534 	struct input_dev *dock = info->dock;
535 	unsigned int code;
536 
537 	switch (button_type) {
538 	case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
539 		... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
540 		/* DOCK_KEY_PREV */
541 		code = KEY_PREVIOUSSONG;
542 		break;
543 	case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
544 		... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
545 		/* DOCK_KEY_NEXT */
546 		code = KEY_NEXTSONG;
547 		break;
548 	case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
549 		/* DOCK_VOL_DOWN */
550 		code = KEY_VOLUMEDOWN;
551 		break;
552 	case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
553 		/* DOCK_VOL_UP */
554 		code = KEY_VOLUMEUP;
555 		break;
556 	case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
557 		... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
558 		/* DOCK_KEY_PLAY_PAUSE */
559 		code = KEY_PLAYPAUSE;
560 		break;
561 	default:
562 		dev_err(info->dev,
563 			"failed to detect %s key (adc:0x%x)\n",
564 			attached ? "pressed" : "released", button_type);
565 		return -EINVAL;
566 	}
567 
568 	input_event(dock, EV_KEY, code, attached);
569 	input_sync(dock);
570 
571 	return 0;
572 }
573 
574 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
575 {
576 	int cable_type_gnd;
577 	int ret = 0;
578 	bool attached;
579 
580 	cable_type_gnd = max77693_muic_get_cable_type(info,
581 				MAX77693_CABLE_GROUP_ADC_GND, &attached);
582 
583 	switch (cable_type_gnd) {
584 	case MAX77693_MUIC_GND_USB_HOST:
585 	case MAX77693_MUIC_GND_USB_HOST_VB:
586 		/* USB_HOST, PATH: AP_USB */
587 		ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
588 						attached);
589 		if (ret < 0)
590 			return ret;
591 		extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
592 		break;
593 	case MAX77693_MUIC_GND_AV_CABLE_LOAD:
594 		/* Audio Video Cable with load, PATH:AUDIO */
595 		ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
596 						attached);
597 		if (ret < 0)
598 			return ret;
599 		extcon_set_state_sync(info->edev, EXTCON_USB, attached);
600 		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
601 					attached);
602 		break;
603 	case MAX77693_MUIC_GND_MHL:
604 	case MAX77693_MUIC_GND_MHL_VB:
605 		/* MHL or MHL with USB/TA cable */
606 		extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
607 		break;
608 	default:
609 		dev_err(info->dev, "failed to detect %s cable of gnd type\n",
610 			attached ? "attached" : "detached");
611 		return -EINVAL;
612 	}
613 
614 	return 0;
615 }
616 
617 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
618 		int cable_type, bool attached)
619 {
620 	int ret = 0;
621 	u8 path = MAX77693_CONTROL1_SW_OPEN;
622 
623 	dev_info(info->dev,
624 		"external connector is %s (adc:0x%02x)\n",
625 		attached ? "attached" : "detached", cable_type);
626 
627 	switch (cable_type) {
628 	case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:	/* ADC_JIG_USB_OFF */
629 	case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:	/* ADC_JIG_USB_ON */
630 		/* PATH:AP_USB */
631 		path = MAX77693_CONTROL1_SW_USB;
632 		break;
633 	case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:	/* ADC_JIG_UART_OFF */
634 	case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:	/* ADC_JIG_UART_ON */
635 		/* PATH:AP_UART */
636 		path = MAX77693_CONTROL1_SW_UART;
637 		break;
638 	default:
639 		dev_err(info->dev, "failed to detect %s jig cable\n",
640 			attached ? "attached" : "detached");
641 		return -EINVAL;
642 	}
643 
644 	ret = max77693_muic_set_path(info, path, attached);
645 	if (ret < 0)
646 		return ret;
647 
648 	extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
649 
650 	return 0;
651 }
652 
653 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
654 {
655 	int cable_type;
656 	int button_type;
657 	bool attached;
658 	int ret = 0;
659 
660 	/* Check accessory state which is either detached or attached */
661 	cable_type = max77693_muic_get_cable_type(info,
662 				MAX77693_CABLE_GROUP_ADC, &attached);
663 
664 	dev_info(info->dev,
665 		"external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
666 		attached ? "attached" : "detached", cable_type,
667 		info->prev_cable_type);
668 
669 	switch (cable_type) {
670 	case MAX77693_MUIC_ADC_GROUND:
671 		/* USB_HOST/MHL/Audio */
672 		max77693_muic_adc_ground_handler(info);
673 		break;
674 	case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
675 	case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
676 	case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
677 	case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
678 		/* JIG */
679 		ret = max77693_muic_jig_handler(info, cable_type, attached);
680 		if (ret < 0)
681 			return ret;
682 		break;
683 	case MAX77693_MUIC_ADC_RESERVED_ACC_3:		/* Dock-Smart */
684 	case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:	/* Dock-Desk */
685 	case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:		/* Dock-Audio */
686 		/*
687 		 * DOCK device
688 		 *
689 		 * The MAX77693 MUIC device can detect total 34 cable type
690 		 * except of charger cable and MUIC device didn't define
691 		 * specfic role of cable in the range of from 0x01 to 0x12
692 		 * of ADC value. So, can use/define cable with no role according
693 		 * to schema of hardware board.
694 		 */
695 		ret = max77693_muic_dock_handler(info, cable_type, attached);
696 		if (ret < 0)
697 			return ret;
698 		break;
699 	case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
700 	case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
701 	case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
702 	case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
703 	case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
704 		/*
705 		 * Button of DOCK device
706 		 * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
707 		 *
708 		 * The MAX77693 MUIC device can detect total 34 cable type
709 		 * except of charger cable and MUIC device didn't define
710 		 * specfic role of cable in the range of from 0x01 to 0x12
711 		 * of ADC value. So, can use/define cable with no role according
712 		 * to schema of hardware board.
713 		 */
714 		if (attached)
715 			button_type = info->prev_button_type = cable_type;
716 		else
717 			button_type = info->prev_button_type;
718 
719 		ret = max77693_muic_dock_button_handler(info, button_type,
720 							attached);
721 		if (ret < 0)
722 			return ret;
723 		break;
724 	case MAX77693_MUIC_ADC_SEND_END_BUTTON:
725 	case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
726 	case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
727 	case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
728 	case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
729 	case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
730 	case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
731 	case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
732 	case MAX77693_MUIC_ADC_RESERVED_ACC_1:
733 	case MAX77693_MUIC_ADC_RESERVED_ACC_2:
734 	case MAX77693_MUIC_ADC_RESERVED_ACC_4:
735 	case MAX77693_MUIC_ADC_RESERVED_ACC_5:
736 	case MAX77693_MUIC_ADC_CEA936_AUDIO:
737 	case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
738 	case MAX77693_MUIC_ADC_TTY_CONVERTER:
739 	case MAX77693_MUIC_ADC_UART_CABLE:
740 	case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
741 	case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
742 		/*
743 		 * This accessory isn't used in general case if it is specially
744 		 * needed to detect additional accessory, should implement
745 		 * proper operation when this accessory is attached/detached.
746 		 */
747 		dev_info(info->dev,
748 			"accessory is %s but it isn't used (adc:0x%x)\n",
749 			attached ? "attached" : "detached", cable_type);
750 		return -EAGAIN;
751 	default:
752 		dev_err(info->dev,
753 			"failed to detect %s accessory (adc:0x%x)\n",
754 			attached ? "attached" : "detached", cable_type);
755 		return -EINVAL;
756 	}
757 
758 	return 0;
759 }
760 
761 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
762 {
763 	int chg_type;
764 	int cable_type_gnd;
765 	int cable_type;
766 	bool attached;
767 	bool cable_attached;
768 	int ret = 0;
769 
770 	chg_type = max77693_muic_get_cable_type(info,
771 				MAX77693_CABLE_GROUP_CHG, &attached);
772 
773 	dev_info(info->dev,
774 		"external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
775 			attached ? "attached" : "detached",
776 			chg_type, info->prev_chg_type);
777 
778 	switch (chg_type) {
779 	case MAX77693_CHARGER_TYPE_USB:
780 	case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
781 	case MAX77693_CHARGER_TYPE_NONE:
782 		/* Check MAX77693_CABLE_GROUP_ADC_GND type */
783 		cable_type_gnd = max77693_muic_get_cable_type(info,
784 					MAX77693_CABLE_GROUP_ADC_GND,
785 					&cable_attached);
786 		switch (cable_type_gnd) {
787 		case MAX77693_MUIC_GND_MHL:
788 		case MAX77693_MUIC_GND_MHL_VB:
789 			/*
790 			 * MHL cable with USB/TA cable
791 			 * - MHL cable include two port(HDMI line and separate
792 			 * micro-usb port. When the target connect MHL cable,
793 			 * extcon driver check whether USB/TA cable is
794 			 * connected. If USB/TA cable is connected, extcon
795 			 * driver notify state to notifiee for charging battery.
796 			 *
797 			 * Features of 'USB/TA with MHL cable'
798 			 * - Support MHL
799 			 * - Support charging through micro-usb port without
800 			 *   data connection
801 			 */
802 			extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
803 						attached);
804 			extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
805 						cable_attached);
806 			break;
807 		}
808 
809 		/* Check MAX77693_CABLE_GROUP_ADC type */
810 		cable_type = max77693_muic_get_cable_type(info,
811 					MAX77693_CABLE_GROUP_ADC,
812 					&cable_attached);
813 		switch (cable_type) {
814 		case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:		/* Dock-Audio */
815 			/*
816 			 * Dock-Audio device with USB/TA cable
817 			 * - Dock device include two port(Dock-Audio and micro-
818 			 * usb port). When the target connect Dock-Audio device,
819 			 * extcon driver check whether USB/TA cable is connected
820 			 * or not. If USB/TA cable is connected, extcon driver
821 			 * notify state to notifiee for charging battery.
822 			 *
823 			 * Features of 'USB/TA cable with Dock-Audio device'
824 			 * - Support external output feature of audio.
825 			 * - Support charging through micro-usb port without
826 			 *   data connection.
827 			 */
828 			extcon_set_state_sync(info->edev, EXTCON_USB,
829 						attached);
830 			extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
831 						attached);
832 
833 			if (!cable_attached)
834 				extcon_set_state_sync(info->edev, EXTCON_DOCK,
835 							cable_attached);
836 			break;
837 		case MAX77693_MUIC_ADC_RESERVED_ACC_3:		/* Dock-Smart */
838 			/*
839 			 * Dock-Smart device with USB/TA cable
840 			 * - Dock-Desk device include three type of cable which
841 			 * are HDMI, USB for mouse/keyboard and micro-usb port
842 			 * for USB/TA cable. Dock-Smart device need always
843 			 * exteranl power supply(USB/TA cable through micro-usb
844 			 * cable). Dock-Smart device support screen output of
845 			 * target to separate monitor and mouse/keyboard for
846 			 * desktop mode.
847 			 *
848 			 * Features of 'USB/TA cable with Dock-Smart device'
849 			 * - Support MHL
850 			 * - Support external output feature of audio
851 			 * - Support charging through micro-usb port without
852 			 *   data connection if TA cable is connected to target.
853 			 * - Support charging and data connection through micro-
854 			 *   usb port if USB cable is connected between target
855 			 *   and host device
856 			 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
857 			 */
858 			ret = max77693_muic_set_path(info, info->path_usb,
859 						    attached);
860 			if (ret < 0)
861 				return ret;
862 
863 			extcon_set_state_sync(info->edev, EXTCON_DOCK,
864 						attached);
865 			extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
866 						attached);
867 			break;
868 		}
869 
870 		/* Check MAX77693_CABLE_GROUP_CHG type */
871 		switch (chg_type) {
872 		case MAX77693_CHARGER_TYPE_NONE:
873 			/*
874 			 * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
875 			 * cable is attached, muic device happen below two irq.
876 			 * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
877 			 *    MHL/Dock-Audio.
878 			 * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
879 			 *    USB/TA cable connected to MHL or Dock-Audio.
880 			 * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
881 			 * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
882 			 *
883 			 * If user attach MHL (with USB/TA cable and immediately
884 			 * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
885 			 * _INT2_CHGTYP irq is happened, USB/TA cable remain
886 			 * connected state to target. But USB/TA cable isn't
887 			 * connected to target. The user be face with unusual
888 			 * action. So, driver should check this situation in
889 			 * spite of, that previous charger type is N/A.
890 			 */
891 			break;
892 		case MAX77693_CHARGER_TYPE_USB:
893 			/* Only USB cable, PATH:AP_USB */
894 			ret = max77693_muic_set_path(info, info->path_usb,
895 						    attached);
896 			if (ret < 0)
897 				return ret;
898 
899 			extcon_set_state_sync(info->edev, EXTCON_USB,
900 						attached);
901 			extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
902 						attached);
903 			break;
904 		case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
905 			/* Only TA cable */
906 			extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
907 						attached);
908 			break;
909 		}
910 		break;
911 	case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
912 		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
913 					attached);
914 		break;
915 	case MAX77693_CHARGER_TYPE_APPLE_500MA:
916 		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
917 					attached);
918 		break;
919 	case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
920 		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
921 					attached);
922 		break;
923 	case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
924 		break;
925 	default:
926 		dev_err(info->dev,
927 			"failed to detect %s accessory (chg_type:0x%x)\n",
928 			attached ? "attached" : "detached", chg_type);
929 		return -EINVAL;
930 	}
931 
932 	return 0;
933 }
934 
935 static void max77693_muic_irq_work(struct work_struct *work)
936 {
937 	struct max77693_muic_info *info = container_of(work,
938 			struct max77693_muic_info, irq_work);
939 	int irq_type = -1;
940 	int i, ret = 0;
941 
942 	if (!info->edev)
943 		return;
944 
945 	mutex_lock(&info->mutex);
946 
947 	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
948 		if (info->irq == muic_irqs[i].virq)
949 			irq_type = muic_irqs[i].irq;
950 
951 	ret = regmap_bulk_read(info->max77693->regmap_muic,
952 			MAX77693_MUIC_REG_STATUS1, info->status, 2);
953 	if (ret) {
954 		dev_err(info->dev, "failed to read MUIC register\n");
955 		mutex_unlock(&info->mutex);
956 		return;
957 	}
958 
959 	switch (irq_type) {
960 	case MAX77693_MUIC_IRQ_INT1_ADC:
961 	case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
962 	case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
963 	case MAX77693_MUIC_IRQ_INT1_ADC1K:
964 		/*
965 		 * Handle all of accessory except for
966 		 * type of charger accessory.
967 		 */
968 		ret = max77693_muic_adc_handler(info);
969 		break;
970 	case MAX77693_MUIC_IRQ_INT2_CHGTYP:
971 	case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
972 	case MAX77693_MUIC_IRQ_INT2_DCDTMR:
973 	case MAX77693_MUIC_IRQ_INT2_DXOVP:
974 	case MAX77693_MUIC_IRQ_INT2_VBVOLT:
975 	case MAX77693_MUIC_IRQ_INT2_VIDRM:
976 		/* Handle charger accessory */
977 		ret = max77693_muic_chg_handler(info);
978 		break;
979 	case MAX77693_MUIC_IRQ_INT3_EOC:
980 	case MAX77693_MUIC_IRQ_INT3_CGMBC:
981 	case MAX77693_MUIC_IRQ_INT3_OVP:
982 	case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
983 	case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
984 	case MAX77693_MUIC_IRQ_INT3_BAT_DET:
985 		break;
986 	default:
987 		dev_err(info->dev, "muic interrupt: irq %d occurred\n",
988 				irq_type);
989 		mutex_unlock(&info->mutex);
990 		return;
991 	}
992 
993 	if (ret < 0)
994 		dev_err(info->dev, "failed to handle MUIC interrupt\n");
995 
996 	mutex_unlock(&info->mutex);
997 }
998 
999 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1000 {
1001 	struct max77693_muic_info *info = data;
1002 
1003 	info->irq = irq;
1004 	schedule_work(&info->irq_work);
1005 
1006 	return IRQ_HANDLED;
1007 }
1008 
1009 static const struct regmap_config max77693_muic_regmap_config = {
1010 	.reg_bits = 8,
1011 	.val_bits = 8,
1012 };
1013 
1014 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1015 {
1016 	int ret = 0;
1017 	int adc;
1018 	int chg_type;
1019 	bool attached;
1020 
1021 	mutex_lock(&info->mutex);
1022 
1023 	/* Read STATUSx register to detect accessory */
1024 	ret = regmap_bulk_read(info->max77693->regmap_muic,
1025 			MAX77693_MUIC_REG_STATUS1, info->status, 2);
1026 	if (ret) {
1027 		dev_err(info->dev, "failed to read MUIC register\n");
1028 		mutex_unlock(&info->mutex);
1029 		return ret;
1030 	}
1031 
1032 	adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1033 					&attached);
1034 	if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1035 		ret = max77693_muic_adc_handler(info);
1036 		if (ret < 0) {
1037 			dev_err(info->dev, "Cannot detect accessory\n");
1038 			mutex_unlock(&info->mutex);
1039 			return ret;
1040 		}
1041 	}
1042 
1043 	chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1044 					&attached);
1045 	if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1046 		ret = max77693_muic_chg_handler(info);
1047 		if (ret < 0) {
1048 			dev_err(info->dev, "Cannot detect charger accessory\n");
1049 			mutex_unlock(&info->mutex);
1050 			return ret;
1051 		}
1052 	}
1053 
1054 	mutex_unlock(&info->mutex);
1055 
1056 	return 0;
1057 }
1058 
1059 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1060 {
1061 	struct max77693_muic_info *info = container_of(to_delayed_work(work),
1062 				struct max77693_muic_info, wq_detcable);
1063 
1064 	max77693_muic_detect_accessory(info);
1065 }
1066 
1067 static int max77693_muic_probe(struct platform_device *pdev)
1068 {
1069 	struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1070 	struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1071 	struct max77693_muic_info *info;
1072 	struct max77693_reg_data *init_data;
1073 	int num_init_data;
1074 	int delay_jiffies;
1075 	int cable_type;
1076 	bool attached;
1077 	int ret;
1078 	int i;
1079 	unsigned int id;
1080 
1081 	info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1082 				   GFP_KERNEL);
1083 	if (!info)
1084 		return -ENOMEM;
1085 
1086 	info->dev = &pdev->dev;
1087 	info->max77693 = max77693;
1088 	if (info->max77693->regmap_muic) {
1089 		dev_dbg(&pdev->dev, "allocate register map\n");
1090 	} else {
1091 		info->max77693->regmap_muic = devm_regmap_init_i2c(
1092 						info->max77693->i2c_muic,
1093 						&max77693_muic_regmap_config);
1094 		if (IS_ERR(info->max77693->regmap_muic)) {
1095 			ret = PTR_ERR(info->max77693->regmap_muic);
1096 			dev_err(max77693->dev,
1097 				"failed to allocate register map: %d\n", ret);
1098 			return ret;
1099 		}
1100 	}
1101 
1102 	/* Register input device for button of dock device */
1103 	info->dock = devm_input_allocate_device(&pdev->dev);
1104 	if (!info->dock) {
1105 		dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1106 		return -ENOMEM;
1107 	}
1108 	info->dock->name = "max77693-muic/dock";
1109 	info->dock->phys = "max77693-muic/extcon";
1110 	info->dock->dev.parent = &pdev->dev;
1111 
1112 	__set_bit(EV_REP, info->dock->evbit);
1113 
1114 	input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1115 	input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1116 	input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1117 	input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1118 	input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1119 
1120 	ret = input_register_device(info->dock);
1121 	if (ret < 0) {
1122 		dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1123 				ret);
1124 		return ret;
1125 	}
1126 
1127 	platform_set_drvdata(pdev, info);
1128 	mutex_init(&info->mutex);
1129 
1130 	INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1131 
1132 	/* Support irq domain for MAX77693 MUIC device */
1133 	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1134 		struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1135 		int virq;
1136 
1137 		virq = regmap_irq_get_virq(max77693->irq_data_muic,
1138 					muic_irq->irq);
1139 		if (virq <= 0)
1140 			return -EINVAL;
1141 		muic_irq->virq = virq;
1142 
1143 		ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1144 				max77693_muic_irq_handler,
1145 				IRQF_NO_SUSPEND,
1146 				muic_irq->name, info);
1147 		if (ret) {
1148 			dev_err(&pdev->dev,
1149 				"failed: irq request (IRQ: %d, error :%d)\n",
1150 				muic_irq->irq, ret);
1151 			return ret;
1152 		}
1153 	}
1154 
1155 	/* Initialize extcon device */
1156 	info->edev = devm_extcon_dev_allocate(&pdev->dev,
1157 					      max77693_extcon_cable);
1158 	if (IS_ERR(info->edev)) {
1159 		dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1160 		return -ENOMEM;
1161 	}
1162 
1163 	ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1164 	if (ret) {
1165 		dev_err(&pdev->dev, "failed to register extcon device\n");
1166 		return ret;
1167 	}
1168 
1169 	/* Initialize MUIC register by using platform data or default data */
1170 	if (pdata && pdata->muic_data) {
1171 		init_data = pdata->muic_data->init_data;
1172 		num_init_data = pdata->muic_data->num_init_data;
1173 	} else {
1174 		init_data = default_init_data;
1175 		num_init_data = ARRAY_SIZE(default_init_data);
1176 	}
1177 
1178 	for (i = 0; i < num_init_data; i++) {
1179 		regmap_write(info->max77693->regmap_muic,
1180 				init_data[i].addr,
1181 				init_data[i].data);
1182 	}
1183 
1184 	if (pdata && pdata->muic_data) {
1185 		struct max77693_muic_platform_data *muic_pdata
1186 						   = pdata->muic_data;
1187 
1188 		/*
1189 		 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1190 		 * h/w path of COMP2/COMN1 on CONTROL1 register.
1191 		 */
1192 		if (muic_pdata->path_uart)
1193 			info->path_uart = muic_pdata->path_uart;
1194 		else
1195 			info->path_uart = MAX77693_CONTROL1_SW_UART;
1196 
1197 		if (muic_pdata->path_usb)
1198 			info->path_usb = muic_pdata->path_usb;
1199 		else
1200 			info->path_usb = MAX77693_CONTROL1_SW_USB;
1201 
1202 		/*
1203 		 * Default delay time for detecting cable state
1204 		 * after certain time.
1205 		 */
1206 		if (muic_pdata->detcable_delay_ms)
1207 			delay_jiffies =
1208 				msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1209 		else
1210 			delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1211 	} else {
1212 		info->path_usb = MAX77693_CONTROL1_SW_USB;
1213 		info->path_uart = MAX77693_CONTROL1_SW_UART;
1214 		delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1215 	}
1216 
1217 	/* Set initial path for UART when JIG is connected to get serial logs */
1218 	ret = regmap_bulk_read(info->max77693->regmap_muic,
1219 			MAX77693_MUIC_REG_STATUS1, info->status, 2);
1220 	if (ret) {
1221 		dev_err(info->dev, "failed to read MUIC register\n");
1222 		return ret;
1223 	}
1224 	cable_type = max77693_muic_get_cable_type(info,
1225 					   MAX77693_CABLE_GROUP_ADC, &attached);
1226 	if (attached && (cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON ||
1227 			 cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF))
1228 		max77693_muic_set_path(info, info->path_uart, true);
1229 
1230 	/* Check revision number of MUIC device*/
1231 	ret = regmap_read(info->max77693->regmap_muic,
1232 			MAX77693_MUIC_REG_ID, &id);
1233 	if (ret < 0) {
1234 		dev_err(&pdev->dev, "failed to read revision number\n");
1235 		return ret;
1236 	}
1237 	dev_info(info->dev, "device ID : 0x%x\n", id);
1238 
1239 	/* Set ADC debounce time */
1240 	max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1241 
1242 	/*
1243 	 * Detect accessory after completing the initialization of platform
1244 	 *
1245 	 * - Use delayed workqueue to detect cable state and then
1246 	 * notify cable state to notifiee/platform through uevent.
1247 	 * After completing the booting of platform, the extcon provider
1248 	 * driver should notify cable state to upper layer.
1249 	 */
1250 	INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1251 	queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1252 			delay_jiffies);
1253 
1254 	return ret;
1255 }
1256 
1257 static int max77693_muic_remove(struct platform_device *pdev)
1258 {
1259 	struct max77693_muic_info *info = platform_get_drvdata(pdev);
1260 
1261 	cancel_work_sync(&info->irq_work);
1262 	input_unregister_device(info->dock);
1263 
1264 	return 0;
1265 }
1266 
1267 static struct platform_driver max77693_muic_driver = {
1268 	.driver		= {
1269 		.name	= DEV_NAME,
1270 	},
1271 	.probe		= max77693_muic_probe,
1272 	.remove		= max77693_muic_remove,
1273 };
1274 
1275 module_platform_driver(max77693_muic_driver);
1276 
1277 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1278 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1279 MODULE_LICENSE("GPL");
1280 MODULE_ALIAS("platform:extcon-max77693");
1281