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  */
33 static 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 
59 enum 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 
66 struct 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 
99 enum 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 
106 enum 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  */
122 struct max77693_muic_irq {
123 	unsigned int irq;
124 	const char *name;
125 	unsigned int virq;
126 };
127 
128 static 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 */
148 enum 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  */
197 static 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  */
max77693_muic_set_debounce_time(struct max77693_muic_info * info,enum max77693_muic_adc_debounce_time time)216 static 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  */
max77693_muic_set_path(struct max77693_muic_info * info,u8 val,bool attached)257 static 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  */
max77693_muic_get_cable_type(struct max77693_muic_info * info,enum max77693_muic_cable_group group,bool * attached)309 static 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 
max77693_muic_dock_handler(struct max77693_muic_info * info,int cable_type,bool attached)450 static 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 
528 out:
529 	return 0;
530 }
531 
max77693_muic_dock_button_handler(struct max77693_muic_info * info,int button_type,bool attached)532 static 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 
max77693_muic_adc_ground_handler(struct max77693_muic_info * info)575 static 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 
max77693_muic_jig_handler(struct max77693_muic_info * info,int cable_type,bool attached)618 static 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 
max77693_muic_adc_handler(struct max77693_muic_info * info)654 static 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 
max77693_muic_chg_handler(struct max77693_muic_info * info)762 static 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 
max77693_muic_irq_work(struct work_struct * work)936 static 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 
max77693_muic_irq_handler(int irq,void * data)1000 static 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 
1010 static const struct regmap_config max77693_muic_regmap_config = {
1011 	.reg_bits = 8,
1012 	.val_bits = 8,
1013 };
1014 
max77693_muic_detect_accessory(struct max77693_muic_info * info)1015 static 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 
max77693_muic_detect_cable_wq(struct work_struct * work)1060 static 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 
max77693_muic_probe(struct platform_device * pdev)1068 static 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 
1261 static struct platform_driver max77693_muic_driver = {
1262 	.driver		= {
1263 		.name	= DEV_NAME,
1264 	},
1265 	.probe		= max77693_muic_probe,
1266 };
1267 
1268 module_platform_driver(max77693_muic_driver);
1269 
1270 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1271 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1272 MODULE_LICENSE("GPL");
1273 MODULE_ALIAS("platform:max77693-muic");
1274