Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/extcon/extcon-max77693.c

  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-private.h>
 28 #include <linux/extcon.h>
 29 #include <linux/regmap.h>
 30 #include <linux/irqdomain.h>
 31 
 32 #define DEV_NAME                        "max77693-muic"
 33 #define DELAY_MS_DEFAULT                20000           /* unit: millisecond */
 34 
 35 /*
 36  * Default value of MAX77693 register to bring up MUIC device.
 37  * If user don't set some initial value for MUIC device through platform data,
 38  * extcon-max77693 driver use 'default_init_data' to bring up base operation
 39  * of MAX77693 MUIC device.
 40  */
 41 static struct max77693_reg_data default_init_data[] = {
 42         {
 43                 /* STATUS2 - [3]ChgDetRun */
 44                 .addr = MAX77693_MUIC_REG_STATUS2,
 45                 .data = STATUS2_CHGDETRUN_MASK,
 46         }, {
 47                 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
 48                 .addr = MAX77693_MUIC_REG_INTMASK1,
 49                 .data = INTMASK1_ADC1K_MASK
 50                         | INTMASK1_ADC_MASK,
 51         }, {
 52                 /* INTMASK2 - Unmask [0]ChgTypM */
 53                 .addr = MAX77693_MUIC_REG_INTMASK2,
 54                 .data = INTMASK2_CHGTYP_MASK,
 55         }, {
 56                 /* INTMASK3 - Mask all of interrupts */
 57                 .addr = MAX77693_MUIC_REG_INTMASK3,
 58                 .data = 0x0,
 59         }, {
 60                 /* CDETCTRL2 */
 61                 .addr = MAX77693_MUIC_REG_CDETCTRL2,
 62                 .data = CDETCTRL2_VIDRMEN_MASK
 63                         | CDETCTRL2_DXOVPEN_MASK,
 64         },
 65 };
 66 
 67 enum max77693_muic_adc_debounce_time {
 68         ADC_DEBOUNCE_TIME_5MS = 0,
 69         ADC_DEBOUNCE_TIME_10MS,
 70         ADC_DEBOUNCE_TIME_25MS,
 71         ADC_DEBOUNCE_TIME_38_62MS,
 72 };
 73 
 74 struct max77693_muic_info {
 75         struct device *dev;
 76         struct max77693_dev *max77693;
 77         struct extcon_dev *edev;
 78         int prev_cable_type;
 79         int prev_cable_type_gnd;
 80         int prev_chg_type;
 81         int prev_button_type;
 82         u8 status[2];
 83 
 84         int irq;
 85         struct work_struct irq_work;
 86         struct mutex mutex;
 87 
 88         /*
 89          * Use delayed workqueue to detect cable state and then
 90          * notify cable state to notifiee/platform through uevent.
 91          * After completing the booting of platform, the extcon provider
 92          * driver should notify cable state to upper layer.
 93          */
 94         struct delayed_work wq_detcable;
 95 
 96         /* Button of dock device */
 97         struct input_dev *dock;
 98 
 99         /*
100          * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
101          * h/w path of COMP2/COMN1 on CONTROL1 register.
102          */
103         int path_usb;
104         int path_uart;
105 };
106 
107 enum max77693_muic_cable_group {
108         MAX77693_CABLE_GROUP_ADC = 0,
109         MAX77693_CABLE_GROUP_ADC_GND,
110         MAX77693_CABLE_GROUP_CHG,
111         MAX77693_CABLE_GROUP_VBVOLT,
112 };
113 
114 enum max77693_muic_charger_type {
115         MAX77693_CHARGER_TYPE_NONE = 0,
116         MAX77693_CHARGER_TYPE_USB,
117         MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
118         MAX77693_CHARGER_TYPE_DEDICATED_CHG,
119         MAX77693_CHARGER_TYPE_APPLE_500MA,
120         MAX77693_CHARGER_TYPE_APPLE_1A_2A,
121         MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
122 };
123 
124 /**
125  * struct max77693_muic_irq
126  * @irq: the index of irq list of MUIC device.
127  * @name: the name of irq.
128  * @virq: the virtual irq to use irq domain
129  */
130 struct max77693_muic_irq {
131         unsigned int irq;
132         const char *name;
133         unsigned int virq;
134 };
135 
136 static struct max77693_muic_irq muic_irqs[] = {
137         { MAX77693_MUIC_IRQ_INT1_ADC,           "muic-ADC" },
138         { MAX77693_MUIC_IRQ_INT1_ADC_LOW,       "muic-ADCLOW" },
139         { MAX77693_MUIC_IRQ_INT1_ADC_ERR,       "muic-ADCError" },
140         { MAX77693_MUIC_IRQ_INT1_ADC1K,         "muic-ADC1K" },
141         { MAX77693_MUIC_IRQ_INT2_CHGTYP,        "muic-CHGTYP" },
142         { MAX77693_MUIC_IRQ_INT2_CHGDETREUN,    "muic-CHGDETREUN" },
143         { MAX77693_MUIC_IRQ_INT2_DCDTMR,        "muic-DCDTMR" },
144         { MAX77693_MUIC_IRQ_INT2_DXOVP,         "muic-DXOVP" },
145         { MAX77693_MUIC_IRQ_INT2_VBVOLT,        "muic-VBVOLT" },
146         { MAX77693_MUIC_IRQ_INT2_VIDRM,         "muic-VIDRM" },
147         { MAX77693_MUIC_IRQ_INT3_EOC,           "muic-EOC" },
148         { MAX77693_MUIC_IRQ_INT3_CGMBC,         "muic-CGMBC" },
149         { MAX77693_MUIC_IRQ_INT3_OVP,           "muic-OVP" },
150         { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,    "muic-MBCCHG_ERR" },
151         { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,   "muic-CHG_ENABLED" },
152         { MAX77693_MUIC_IRQ_INT3_BAT_DET,       "muic-BAT_DET" },
153 };
154 
155 /* Define supported accessory type */
156 enum max77693_muic_acc_type {
157         MAX77693_MUIC_ADC_GROUND = 0x0,
158         MAX77693_MUIC_ADC_SEND_END_BUTTON,
159         MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
160         MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
161         MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
162         MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
163         MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
164         MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
165         MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
166         MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
167         MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
168         MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
169         MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
170         MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
171         MAX77693_MUIC_ADC_RESERVED_ACC_1,
172         MAX77693_MUIC_ADC_RESERVED_ACC_2,
173         MAX77693_MUIC_ADC_RESERVED_ACC_3,
174         MAX77693_MUIC_ADC_RESERVED_ACC_4,
175         MAX77693_MUIC_ADC_RESERVED_ACC_5,
176         MAX77693_MUIC_ADC_CEA936_AUDIO,
177         MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
178         MAX77693_MUIC_ADC_TTY_CONVERTER,
179         MAX77693_MUIC_ADC_UART_CABLE,
180         MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
181         MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
182         MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
183         MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
184         MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
185         MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
186         MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
187         MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
188         MAX77693_MUIC_ADC_OPEN,
189 
190         /* The below accessories have same ADC value so ADCLow and
191            ADC1K bit is used to separate specific accessory */
192                                                 /* ADC|VBVolot|ADCLow|ADC1K| */
193         MAX77693_MUIC_GND_USB_OTG = 0x100,      /* 0x0|      0|     0|    0| */
194         MAX77693_MUIC_GND_USB_OTG_VB = 0x104,   /* 0x0|      1|     0|    0| */
195         MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0|      0|     1|    0| */
196         MAX77693_MUIC_GND_MHL = 0x103,          /* 0x0|      0|     1|    1| */
197         MAX77693_MUIC_GND_MHL_VB = 0x107,       /* 0x0|      1|     1|    1| */
198 };
199 
200 /*
201  * MAX77693 MUIC device support below list of accessories(external connector)
202  */
203 enum {
204         EXTCON_CABLE_USB = 0,
205         EXTCON_CABLE_USB_HOST,
206         EXTCON_CABLE_TA,
207         EXTCON_CABLE_FAST_CHARGER,
208         EXTCON_CABLE_SLOW_CHARGER,
209         EXTCON_CABLE_CHARGE_DOWNSTREAM,
210         EXTCON_CABLE_MHL,
211         EXTCON_CABLE_MHL_TA,
212         EXTCON_CABLE_JIG_USB_ON,
213         EXTCON_CABLE_JIG_USB_OFF,
214         EXTCON_CABLE_JIG_UART_OFF,
215         EXTCON_CABLE_JIG_UART_ON,
216         EXTCON_CABLE_DOCK_SMART,
217         EXTCON_CABLE_DOCK_DESK,
218         EXTCON_CABLE_DOCK_AUDIO,
219 
220         _EXTCON_CABLE_NUM,
221 };
222 
223 static const char *max77693_extcon_cable[] = {
224         [EXTCON_CABLE_USB]                      = "USB",
225         [EXTCON_CABLE_USB_HOST]                 = "USB-Host",
226         [EXTCON_CABLE_TA]                       = "TA",
227         [EXTCON_CABLE_FAST_CHARGER]             = "Fast-charger",
228         [EXTCON_CABLE_SLOW_CHARGER]             = "Slow-charger",
229         [EXTCON_CABLE_CHARGE_DOWNSTREAM]        = "Charge-downstream",
230         [EXTCON_CABLE_MHL]                      = "MHL",
231         [EXTCON_CABLE_MHL_TA]                   = "MHL_TA",
232         [EXTCON_CABLE_JIG_USB_ON]               = "JIG-USB-ON",
233         [EXTCON_CABLE_JIG_USB_OFF]              = "JIG-USB-OFF",
234         [EXTCON_CABLE_JIG_UART_OFF]             = "JIG-UART-OFF",
235         [EXTCON_CABLE_JIG_UART_ON]              = "Dock-Car",
236         [EXTCON_CABLE_DOCK_SMART]               = "Dock-Smart",
237         [EXTCON_CABLE_DOCK_DESK]                = "Dock-Desk",
238         [EXTCON_CABLE_DOCK_AUDIO]               = "Dock-Audio",
239 
240         NULL,
241 };
242 
243 /*
244  * max77693_muic_set_debounce_time - Set the debounce time of ADC
245  * @info: the instance including private data of max77693 MUIC
246  * @time: the debounce time of ADC
247  */
248 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
249                 enum max77693_muic_adc_debounce_time time)
250 {
251         int ret;
252 
253         switch (time) {
254         case ADC_DEBOUNCE_TIME_5MS:
255         case ADC_DEBOUNCE_TIME_10MS:
256         case ADC_DEBOUNCE_TIME_25MS:
257         case ADC_DEBOUNCE_TIME_38_62MS:
258                 /*
259                  * Don't touch BTLDset, JIGset when you want to change adc
260                  * debounce time. If it writes other than 0 to BTLDset, JIGset
261                  * muic device will be reset and loose current state.
262                  */
263                 ret = regmap_write(info->max77693->regmap_muic,
264                                   MAX77693_MUIC_REG_CTRL3,
265                                   time << CONTROL3_ADCDBSET_SHIFT);
266                 if (ret) {
267                         dev_err(info->dev, "failed to set ADC debounce time\n");
268                         return ret;
269                 }
270                 break;
271         default:
272                 dev_err(info->dev, "invalid ADC debounce time\n");
273                 return -EINVAL;
274         }
275 
276         return 0;
277 };
278 
279 /*
280  * max77693_muic_set_path - Set hardware line according to attached cable
281  * @info: the instance including private data of max77693 MUIC
282  * @value: the path according to attached cable
283  * @attached: the state of cable (true:attached, false:detached)
284  *
285  * The max77693 MUIC device share outside H/W line among a varity of cables
286  * so, this function set internal path of H/W line according to the type of
287  * attached cable.
288  */
289 static int max77693_muic_set_path(struct max77693_muic_info *info,
290                 u8 val, bool attached)
291 {
292         int ret = 0;
293         unsigned int ctrl1, ctrl2 = 0;
294 
295         if (attached)
296                 ctrl1 = val;
297         else
298                 ctrl1 = CONTROL1_SW_OPEN;
299 
300         ret = regmap_update_bits(info->max77693->regmap_muic,
301                         MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
302         if (ret < 0) {
303                 dev_err(info->dev, "failed to update MUIC register\n");
304                 return ret;
305         }
306 
307         if (attached)
308                 ctrl2 |= CONTROL2_CPEN_MASK;    /* LowPwr=0, CPEn=1 */
309         else
310                 ctrl2 |= CONTROL2_LOWPWR_MASK;  /* LowPwr=1, CPEn=0 */
311 
312         ret = regmap_update_bits(info->max77693->regmap_muic,
313                         MAX77693_MUIC_REG_CTRL2,
314                         CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK, ctrl2);
315         if (ret < 0) {
316                 dev_err(info->dev, "failed to update MUIC register\n");
317                 return ret;
318         }
319 
320         dev_info(info->dev,
321                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
322                 ctrl1, ctrl2, attached ? "attached" : "detached");
323 
324         return 0;
325 }
326 
327 /*
328  * max77693_muic_get_cable_type - Return cable type and check cable state
329  * @info: the instance including private data of max77693 MUIC
330  * @group: the path according to attached cable
331  * @attached: store cable state and return
332  *
333  * This function check the cable state either attached or detached,
334  * and then divide precise type of cable according to cable group.
335  *      - MAX77693_CABLE_GROUP_ADC
336  *      - MAX77693_CABLE_GROUP_ADC_GND
337  *      - MAX77693_CABLE_GROUP_CHG
338  *      - MAX77693_CABLE_GROUP_VBVOLT
339  */
340 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
341                 enum max77693_muic_cable_group group, bool *attached)
342 {
343         int cable_type = 0;
344         int adc;
345         int adc1k;
346         int adclow;
347         int vbvolt;
348         int chg_type;
349 
350         switch (group) {
351         case MAX77693_CABLE_GROUP_ADC:
352                 /*
353                  * Read ADC value to check cable type and decide cable state
354                  * according to cable type
355                  */
356                 adc = info->status[0] & STATUS1_ADC_MASK;
357                 adc >>= STATUS1_ADC_SHIFT;
358 
359                 /*
360                  * Check current cable state/cable type and store cable type
361                  * (info->prev_cable_type) for handling cable when cable is
362                  * detached.
363                  */
364                 if (adc == MAX77693_MUIC_ADC_OPEN) {
365                         *attached = false;
366 
367                         cable_type = info->prev_cable_type;
368                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
369                 } else {
370                         *attached = true;
371 
372                         cable_type = info->prev_cable_type = adc;
373                 }
374                 break;
375         case MAX77693_CABLE_GROUP_ADC_GND:
376                 /*
377                  * Read ADC value to check cable type and decide cable state
378                  * according to cable type
379                  */
380                 adc = info->status[0] & STATUS1_ADC_MASK;
381                 adc >>= STATUS1_ADC_SHIFT;
382 
383                 /*
384                  * Check current cable state/cable type and store cable type
385                  * (info->prev_cable_type/_gnd) for handling cable when cable
386                  * is detached.
387                  */
388                 if (adc == MAX77693_MUIC_ADC_OPEN) {
389                         *attached = false;
390 
391                         cable_type = info->prev_cable_type_gnd;
392                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
393                 } else {
394                         *attached = true;
395 
396                         adclow = info->status[0] & STATUS1_ADCLOW_MASK;
397                         adclow >>= STATUS1_ADCLOW_SHIFT;
398                         adc1k = info->status[0] & STATUS1_ADC1K_MASK;
399                         adc1k >>= STATUS1_ADC1K_SHIFT;
400 
401                         vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
402                         vbvolt >>= STATUS2_VBVOLT_SHIFT;
403 
404                         /**
405                          * [0x1|VBVolt|ADCLow|ADC1K]
406                          * [0x1|     0|     0|    0] USB_OTG
407                          * [0x1|     1|     0|    0] USB_OTG_VB
408                          * [0x1|     0|     1|    0] Audio Video cable with load
409                          * [0x1|     0|     1|    1] MHL without charging cable
410                          * [0x1|     1|     1|    1] MHL with charging cable
411                          */
412                         cable_type = ((0x1 << 8)
413                                         | (vbvolt << 2)
414                                         | (adclow << 1)
415                                         | adc1k);
416 
417                         info->prev_cable_type = adc;
418                         info->prev_cable_type_gnd = cable_type;
419                 }
420 
421                 break;
422         case MAX77693_CABLE_GROUP_CHG:
423                 /*
424                  * Read charger type to check cable type and decide cable state
425                  * according to type of charger cable.
426                  */
427                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
428                 chg_type >>= STATUS2_CHGTYP_SHIFT;
429 
430                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
431                         *attached = false;
432 
433                         cable_type = info->prev_chg_type;
434                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
435                 } else {
436                         *attached = true;
437 
438                         /*
439                          * Check current cable state/cable type and store cable
440                          * type(info->prev_chg_type) for handling cable when
441                          * charger cable is detached.
442                          */
443                         cable_type = info->prev_chg_type = chg_type;
444                 }
445 
446                 break;
447         case MAX77693_CABLE_GROUP_VBVOLT:
448                 /*
449                  * Read ADC value to check cable type and decide cable state
450                  * according to cable type
451                  */
452                 adc = info->status[0] & STATUS1_ADC_MASK;
453                 adc >>= STATUS1_ADC_SHIFT;
454                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
455                 chg_type >>= STATUS2_CHGTYP_SHIFT;
456 
457                 if (adc == MAX77693_MUIC_ADC_OPEN
458                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
459                         *attached = false;
460                 else
461                         *attached = true;
462 
463                 /*
464                  * Read vbvolt field, if vbvolt is 1,
465                  * this cable is used for charging.
466                  */
467                 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
468                 vbvolt >>= STATUS2_VBVOLT_SHIFT;
469 
470                 cable_type = vbvolt;
471                 break;
472         default:
473                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
474                 cable_type = -EINVAL;
475                 break;
476         }
477 
478         return cable_type;
479 }
480 
481 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
482                 int cable_type, bool attached)
483 {
484         int ret = 0;
485         int vbvolt;
486         bool cable_attached;
487         char dock_name[CABLE_NAME_MAX];
488 
489         dev_info(info->dev,
490                 "external connector is %s (adc:0x%02x)\n",
491                 attached ? "attached" : "detached", cable_type);
492 
493         switch (cable_type) {
494         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
495                 /*
496                  * Check power cable whether attached or detached state.
497                  * The Dock-Smart device need surely external power supply.
498                  * If power cable(USB/TA) isn't connected to Dock device,
499                  * user can't use Dock-Smart for desktop mode.
500                  */
501                 vbvolt = max77693_muic_get_cable_type(info,
502                                 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
503                 if (attached && !vbvolt) {
504                         dev_warn(info->dev,
505                                 "Cannot detect external power supply\n");
506                         return 0;
507                 }
508 
509                 /*
510                  * Notify Dock-Smart/MHL state.
511                  * - Dock-Smart device include three type of cable which
512                  * are HDMI, USB for mouse/keyboard and micro-usb port
513                  * for USB/TA cable. Dock-Smart device need always exteranl
514                  * power supply(USB/TA cable through micro-usb cable). Dock-
515                  * Smart device support screen output of target to separate
516                  * monitor and mouse/keyboard for desktop mode.
517                  *
518                  * Features of 'USB/TA cable with Dock-Smart device'
519                  * - Support MHL
520                  * - Support external output feature of audio
521                  * - Support charging through micro-usb port without data
522                  *           connection if TA cable is connected to target.
523                  * - Support charging and data connection through micro-usb port
524                  *           if USB cable is connected between target and host
525                  *           device.
526                  * - Support OTG device (Mouse/Keyboard)
527                  */
528                 ret = max77693_muic_set_path(info, info->path_usb, attached);
529                 if (ret < 0)
530                         return ret;
531 
532                 extcon_set_cable_state(info->edev, "Dock-Smart", attached);
533                 extcon_set_cable_state(info->edev, "MHL", attached);
534                 goto out;
535         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* Dock-Car */
536                 strcpy(dock_name, "Dock-Car");
537                 break;
538         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
539                 strcpy(dock_name, "Dock-Desk");
540                 break;
541         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
542                 strcpy(dock_name, "Dock-Audio");
543                 if (!attached)
544                         extcon_set_cable_state(info->edev, "USB", false);
545                 break;
546         default:
547                 dev_err(info->dev, "failed to detect %s dock device\n",
548                         attached ? "attached" : "detached");
549                 return -EINVAL;
550         }
551 
552         /* Dock-Car/Desk/Audio, PATH:AUDIO */
553         ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
554         if (ret < 0)
555                 return ret;
556         extcon_set_cable_state(info->edev, dock_name, attached);
557 
558 out:
559         return 0;
560 }
561 
562 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
563                 int button_type, bool attached)
564 {
565         struct input_dev *dock = info->dock;
566         unsigned int code;
567 
568         switch (button_type) {
569         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
570                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
571                 /* DOCK_KEY_PREV */
572                 code = KEY_PREVIOUSSONG;
573                 break;
574         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
575                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
576                 /* DOCK_KEY_NEXT */
577                 code = KEY_NEXTSONG;
578                 break;
579         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
580                 /* DOCK_VOL_DOWN */
581                 code = KEY_VOLUMEDOWN;
582                 break;
583         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
584                 /* DOCK_VOL_UP */
585                 code = KEY_VOLUMEUP;
586                 break;
587         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
588                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
589                 /* DOCK_KEY_PLAY_PAUSE */
590                 code = KEY_PLAYPAUSE;
591                 break;
592         default:
593                 dev_err(info->dev,
594                         "failed to detect %s key (adc:0x%x)\n",
595                         attached ? "pressed" : "released", button_type);
596                 return -EINVAL;
597         }
598 
599         input_event(dock, EV_KEY, code, attached);
600         input_sync(dock);
601 
602         return 0;
603 }
604 
605 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
606 {
607         int cable_type_gnd;
608         int ret = 0;
609         bool attached;
610 
611         cable_type_gnd = max77693_muic_get_cable_type(info,
612                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
613 
614         switch (cable_type_gnd) {
615         case MAX77693_MUIC_GND_USB_OTG:
616         case MAX77693_MUIC_GND_USB_OTG_VB:
617                 /* USB_OTG, PATH: AP_USB */
618                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
619                 if (ret < 0)
620                         return ret;
621                 extcon_set_cable_state(info->edev, "USB-Host", attached);
622                 break;
623         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
624                 /* Audio Video Cable with load, PATH:AUDIO */
625                 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
626                 if (ret < 0)
627                         return ret;
628                 extcon_set_cable_state(info->edev,
629                                 "Audio-video-load", attached);
630                 break;
631         case MAX77693_MUIC_GND_MHL:
632         case MAX77693_MUIC_GND_MHL_VB:
633                 /* MHL or MHL with USB/TA cable */
634                 extcon_set_cable_state(info->edev, "MHL", attached);
635                 break;
636         default:
637                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
638                         attached ? "attached" : "detached");
639                 return -EINVAL;
640         }
641 
642         return 0;
643 }
644 
645 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
646                 int cable_type, bool attached)
647 {
648         char cable_name[32];
649         int ret = 0;
650         u8 path = CONTROL1_SW_OPEN;
651 
652         dev_info(info->dev,
653                 "external connector is %s (adc:0x%02x)\n",
654                 attached ? "attached" : "detached", cable_type);
655 
656         switch (cable_type) {
657         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
658                 /* PATH:AP_USB */
659                 strcpy(cable_name, "JIG-USB-OFF");
660                 path = CONTROL1_SW_USB;
661                 break;
662         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
663                 /* PATH:AP_USB */
664                 strcpy(cable_name, "JIG-USB-ON");
665                 path = CONTROL1_SW_USB;
666                 break;
667         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
668                 /* PATH:AP_UART */
669                 strcpy(cable_name, "JIG-UART-OFF");
670                 path = CONTROL1_SW_UART;
671                 break;
672         default:
673                 dev_err(info->dev, "failed to detect %s jig cable\n",
674                         attached ? "attached" : "detached");
675                 return -EINVAL;
676         }
677 
678         ret = max77693_muic_set_path(info, path, attached);
679         if (ret < 0)
680                 return ret;
681 
682         extcon_set_cable_state(info->edev, cable_name, attached);
683 
684         return 0;
685 }
686 
687 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
688 {
689         int cable_type;
690         int button_type;
691         bool attached;
692         int ret = 0;
693 
694         /* Check accessory state which is either detached or attached */
695         cable_type = max77693_muic_get_cable_type(info,
696                                 MAX77693_CABLE_GROUP_ADC, &attached);
697 
698         dev_info(info->dev,
699                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
700                 attached ? "attached" : "detached", cable_type,
701                 info->prev_cable_type);
702 
703         switch (cable_type) {
704         case MAX77693_MUIC_ADC_GROUND:
705                 /* USB_OTG/MHL/Audio */
706                 max77693_muic_adc_ground_handler(info);
707                 break;
708         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
709         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
710         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
711                 /* JIG */
712                 ret = max77693_muic_jig_handler(info, cable_type, attached);
713                 if (ret < 0)
714                         return ret;
715                 break;
716         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
717         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* Dock-Car */
718         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
719         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
720                 /*
721                  * DOCK device
722                  *
723                  * The MAX77693 MUIC device can detect total 34 cable type
724                  * except of charger cable and MUIC device didn't define
725                  * specfic role of cable in the range of from 0x01 to 0x12
726                  * of ADC value. So, can use/define cable with no role according
727                  * to schema of hardware board.
728                  */
729                 ret = max77693_muic_dock_handler(info, cable_type, attached);
730                 if (ret < 0)
731                         return ret;
732                 break;
733         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
734         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
735         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
736         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
737         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
738                 /*
739                  * Button of DOCK device
740                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
741                  *
742                  * The MAX77693 MUIC device can detect total 34 cable type
743                  * except of charger cable and MUIC device didn't define
744                  * specfic role of cable in the range of from 0x01 to 0x12
745                  * of ADC value. So, can use/define cable with no role according
746                  * to schema of hardware board.
747                  */
748                 if (attached)
749                         button_type = info->prev_button_type = cable_type;
750                 else
751                         button_type = info->prev_button_type;
752 
753                 ret = max77693_muic_dock_button_handler(info, button_type,
754                                                         attached);
755                 if (ret < 0)
756                         return ret;
757                 break;
758         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
759         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
760         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
761         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
762         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
763         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
764         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
765         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
766         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
767         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
768         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
769         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
770         case MAX77693_MUIC_ADC_CEA936_AUDIO:
771         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
772         case MAX77693_MUIC_ADC_TTY_CONVERTER:
773         case MAX77693_MUIC_ADC_UART_CABLE:
774         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
775         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
776                 /*
777                  * This accessory isn't used in general case if it is specially
778                  * needed to detect additional accessory, should implement
779                  * proper operation when this accessory is attached/detached.
780                  */
781                 dev_info(info->dev,
782                         "accessory is %s but it isn't used (adc:0x%x)\n",
783                         attached ? "attached" : "detached", cable_type);
784                 return -EAGAIN;
785         default:
786                 dev_err(info->dev,
787                         "failed to detect %s accessory (adc:0x%x)\n",
788                         attached ? "attached" : "detached", cable_type);
789                 return -EINVAL;
790         }
791 
792         return 0;
793 }
794 
795 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
796 {
797         int chg_type;
798         int cable_type_gnd;
799         int cable_type;
800         bool attached;
801         bool cable_attached;
802         int ret = 0;
803 
804         chg_type = max77693_muic_get_cable_type(info,
805                                 MAX77693_CABLE_GROUP_CHG, &attached);
806 
807         dev_info(info->dev,
808                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
809                         attached ? "attached" : "detached",
810                         chg_type, info->prev_chg_type);
811 
812         switch (chg_type) {
813         case MAX77693_CHARGER_TYPE_USB:
814         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
815         case MAX77693_CHARGER_TYPE_NONE:
816                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
817                 cable_type_gnd = max77693_muic_get_cable_type(info,
818                                         MAX77693_CABLE_GROUP_ADC_GND,
819                                         &cable_attached);
820                 switch (cable_type_gnd) {
821                 case MAX77693_MUIC_GND_MHL:
822                 case MAX77693_MUIC_GND_MHL_VB:
823                         /*
824                          * MHL cable with MHL_TA(USB/TA) cable
825                          * - MHL cable include two port(HDMI line and separate
826                          * micro-usb port. When the target connect MHL cable,
827                          * extcon driver check whether MHL_TA(USB/TA) cable is
828                          * connected. If MHL_TA cable is connected, extcon
829                          * driver notify state to notifiee for charging battery.
830                          *
831                          * Features of 'MHL_TA(USB/TA) with MHL cable'
832                          * - Support MHL
833                          * - Support charging through micro-usb port without
834                          *   data connection
835                          */
836                         extcon_set_cable_state(info->edev, "MHL_TA", attached);
837                         if (!cable_attached)
838                                 extcon_set_cable_state(info->edev,
839                                                       "MHL", cable_attached);
840                         break;
841                 }
842 
843                 /* Check MAX77693_CABLE_GROUP_ADC type */
844                 cable_type = max77693_muic_get_cable_type(info,
845                                         MAX77693_CABLE_GROUP_ADC,
846                                         &cable_attached);
847                 switch (cable_type) {
848                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
849                         /*
850                          * Dock-Audio device with USB/TA cable
851                          * - Dock device include two port(Dock-Audio and micro-
852                          * usb port). When the target connect Dock-Audio device,
853                          * extcon driver check whether USB/TA cable is connected
854                          * or not. If USB/TA cable is connected, extcon driver
855                          * notify state to notifiee for charging battery.
856                          *
857                          * Features of 'USB/TA cable with Dock-Audio device'
858                          * - Support external output feature of audio.
859                          * - Support charging through micro-usb port without
860                          *   data connection.
861                          */
862                         extcon_set_cable_state(info->edev, "USB", attached);
863 
864                         if (!cable_attached)
865                                 extcon_set_cable_state(info->edev, "Dock-Audio",
866                                                       cable_attached);
867                         break;
868                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
869                         /*
870                          * Dock-Smart device with USB/TA cable
871                          * - Dock-Desk device include three type of cable which
872                          * are HDMI, USB for mouse/keyboard and micro-usb port
873                          * for USB/TA cable. Dock-Smart device need always
874                          * exteranl power supply(USB/TA cable through micro-usb
875                          * cable). Dock-Smart device support screen output of
876                          * target to separate monitor and mouse/keyboard for
877                          * desktop mode.
878                          *
879                          * Features of 'USB/TA cable with Dock-Smart device'
880                          * - Support MHL
881                          * - Support external output feature of audio
882                          * - Support charging through micro-usb port without
883                          *   data connection if TA cable is connected to target.
884                          * - Support charging and data connection through micro-
885                          *   usb port if USB cable is connected between target
886                          *   and host device
887                          * - Support OTG device (Mouse/Keyboard)
888                          */
889                         ret = max77693_muic_set_path(info, info->path_usb,
890                                                     attached);
891                         if (ret < 0)
892                                 return ret;
893 
894                         extcon_set_cable_state(info->edev, "Dock-Smart",
895                                               attached);
896                         extcon_set_cable_state(info->edev, "MHL", attached);
897 
898                         break;
899                 }
900 
901                 /* Check MAX77693_CABLE_GROUP_CHG type */
902                 switch (chg_type) {
903                 case MAX77693_CHARGER_TYPE_NONE:
904                         /*
905                          * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
906                          * cable is attached, muic device happen below two irq.
907                          * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
908                          *    MHL/Dock-Audio.
909                          * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
910                          *    USB/TA cable connected to MHL or Dock-Audio.
911                          * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
912                          * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
913                          *
914                          * If user attach MHL (with USB/TA cable and immediately
915                          * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
916                          * _INT2_CHGTYP irq is happened, USB/TA cable remain
917                          * connected state to target. But USB/TA cable isn't
918                          * connected to target. The user be face with unusual
919                          * action. So, driver should check this situation in
920                          * spite of, that previous charger type is N/A.
921                          */
922                         break;
923                 case MAX77693_CHARGER_TYPE_USB:
924                         /* Only USB cable, PATH:AP_USB */
925                         ret = max77693_muic_set_path(info, info->path_usb,
926                                                     attached);
927                         if (ret < 0)
928                                 return ret;
929 
930                         extcon_set_cable_state(info->edev, "USB", attached);
931                         break;
932                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
933                         /* Only TA cable */
934                         extcon_set_cable_state(info->edev, "TA", attached);
935                         break;
936                 }
937                 break;
938         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
939                 extcon_set_cable_state(info->edev,
940                                 "Charge-downstream", attached);
941                 break;
942         case MAX77693_CHARGER_TYPE_APPLE_500MA:
943                 extcon_set_cable_state(info->edev, "Slow-charger", attached);
944                 break;
945         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
946                 extcon_set_cable_state(info->edev, "Fast-charger", attached);
947                 break;
948         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
949                 break;
950         default:
951                 dev_err(info->dev,
952                         "failed to detect %s accessory (chg_type:0x%x)\n",
953                         attached ? "attached" : "detached", chg_type);
954                 return -EINVAL;
955         }
956 
957         return 0;
958 }
959 
960 static void max77693_muic_irq_work(struct work_struct *work)
961 {
962         struct max77693_muic_info *info = container_of(work,
963                         struct max77693_muic_info, irq_work);
964         int irq_type = -1;
965         int i, ret = 0;
966 
967         if (!info->edev)
968                 return;
969 
970         mutex_lock(&info->mutex);
971 
972         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
973                 if (info->irq == muic_irqs[i].virq)
974                         irq_type = muic_irqs[i].irq;
975 
976         ret = regmap_bulk_read(info->max77693->regmap_muic,
977                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
978         if (ret) {
979                 dev_err(info->dev, "failed to read MUIC register\n");
980                 mutex_unlock(&info->mutex);
981                 return;
982         }
983 
984         switch (irq_type) {
985         case MAX77693_MUIC_IRQ_INT1_ADC:
986         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
987         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
988         case MAX77693_MUIC_IRQ_INT1_ADC1K:
989                 /* Handle all of accessory except for
990                    type of charger accessory */
991                 ret = max77693_muic_adc_handler(info);
992                 break;
993         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
994         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
995         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
996         case MAX77693_MUIC_IRQ_INT2_DXOVP:
997         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
998         case MAX77693_MUIC_IRQ_INT2_VIDRM:
999                 /* Handle charger accessory */
1000                 ret = max77693_muic_chg_handler(info);
1001                 break;
1002         case MAX77693_MUIC_IRQ_INT3_EOC:
1003         case MAX77693_MUIC_IRQ_INT3_CGMBC:
1004         case MAX77693_MUIC_IRQ_INT3_OVP:
1005         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
1006         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
1007         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
1008                 break;
1009         default:
1010                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
1011                                 irq_type);
1012                 mutex_unlock(&info->mutex);
1013                 return;
1014         }
1015 
1016         if (ret < 0)
1017                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
1018 
1019         mutex_unlock(&info->mutex);
1020 
1021         return;
1022 }
1023 
1024 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1025 {
1026         struct max77693_muic_info *info = data;
1027 
1028         info->irq = irq;
1029         schedule_work(&info->irq_work);
1030 
1031         return IRQ_HANDLED;
1032 }
1033 
1034 static struct regmap_config max77693_muic_regmap_config = {
1035         .reg_bits = 8,
1036         .val_bits = 8,
1037 };
1038 
1039 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1040 {
1041         int ret = 0;
1042         int adc;
1043         int chg_type;
1044         bool attached;
1045 
1046         mutex_lock(&info->mutex);
1047 
1048         /* Read STATUSx register to detect accessory */
1049         ret = regmap_bulk_read(info->max77693->regmap_muic,
1050                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1051         if (ret) {
1052                 dev_err(info->dev, "failed to read MUIC register\n");
1053                 mutex_unlock(&info->mutex);
1054                 return ret;
1055         }
1056 
1057         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1058                                         &attached);
1059         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1060                 ret = max77693_muic_adc_handler(info);
1061                 if (ret < 0) {
1062                         dev_err(info->dev, "Cannot detect accessory\n");
1063                         mutex_unlock(&info->mutex);
1064                         return ret;
1065                 }
1066         }
1067 
1068         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1069                                         &attached);
1070         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1071                 ret = max77693_muic_chg_handler(info);
1072                 if (ret < 0) {
1073                         dev_err(info->dev, "Cannot detect charger accessory\n");
1074                         mutex_unlock(&info->mutex);
1075                         return ret;
1076                 }
1077         }
1078 
1079         mutex_unlock(&info->mutex);
1080 
1081         return 0;
1082 }
1083 
1084 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1085 {
1086         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1087                                 struct max77693_muic_info, wq_detcable);
1088 
1089         max77693_muic_detect_accessory(info);
1090 }
1091 
1092 static int max77693_muic_probe(struct platform_device *pdev)
1093 {
1094         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1095         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1096         struct max77693_muic_info *info;
1097         struct max77693_reg_data *init_data;
1098         int num_init_data;
1099         int delay_jiffies;
1100         int ret;
1101         int i;
1102         unsigned int id;
1103 
1104         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1105                                    GFP_KERNEL);
1106         if (!info)
1107                 return -ENOMEM;
1108 
1109         info->dev = &pdev->dev;
1110         info->max77693 = max77693;
1111         if (info->max77693->regmap_muic) {
1112                 dev_dbg(&pdev->dev, "allocate register map\n");
1113         } else {
1114                 info->max77693->regmap_muic = devm_regmap_init_i2c(
1115                                                 info->max77693->muic,
1116                                                 &max77693_muic_regmap_config);
1117                 if (IS_ERR(info->max77693->regmap_muic)) {
1118                         ret = PTR_ERR(info->max77693->regmap_muic);
1119                         dev_err(max77693->dev,
1120                                 "failed to allocate register map: %d\n", ret);
1121                         return ret;
1122                 }
1123         }
1124 
1125         /* Register input device for button of dock device */
1126         info->dock = devm_input_allocate_device(&pdev->dev);
1127         if (!info->dock) {
1128                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1129                 return -ENOMEM;
1130         }
1131         info->dock->name = "max77693-muic/dock";
1132         info->dock->phys = "max77693-muic/extcon";
1133         info->dock->dev.parent = &pdev->dev;
1134 
1135         __set_bit(EV_REP, info->dock->evbit);
1136 
1137         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1138         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1139         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1140         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1141         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1142 
1143         ret = input_register_device(info->dock);
1144         if (ret < 0) {
1145                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1146                                 ret);
1147                 return ret;
1148         }
1149 
1150         platform_set_drvdata(pdev, info);
1151         mutex_init(&info->mutex);
1152 
1153         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1154 
1155         /* Support irq domain for MAX77693 MUIC device */
1156         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1157                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1158                 unsigned int virq = 0;
1159 
1160                 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1161                                         muic_irq->irq);
1162                 if (!virq)
1163                         return -EINVAL;
1164                 muic_irq->virq = virq;
1165 
1166                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1167                                 max77693_muic_irq_handler,
1168                                 IRQF_NO_SUSPEND,
1169                                 muic_irq->name, info);
1170                 if (ret) {
1171                         dev_err(&pdev->dev,
1172                                 "failed: irq request (IRQ: %d,"
1173                                 " error :%d)\n",
1174                                 muic_irq->irq, ret);
1175                         return ret;
1176                 }
1177         }
1178 
1179         /* Initialize extcon device */
1180         info->edev = devm_extcon_dev_allocate(&pdev->dev,
1181                                               max77693_extcon_cable);
1182         if (IS_ERR(info->edev)) {
1183                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1184                 return -ENOMEM;
1185         }
1186         info->edev->name = DEV_NAME;
1187 
1188         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1189         if (ret) {
1190                 dev_err(&pdev->dev, "failed to register extcon device\n");
1191                 return ret;
1192         }
1193 
1194         /* Initialize MUIC register by using platform data or default data */
1195         if (pdata && pdata->muic_data) {
1196                 init_data = pdata->muic_data->init_data;
1197                 num_init_data = pdata->muic_data->num_init_data;
1198         } else {
1199                 init_data = default_init_data;
1200                 num_init_data = ARRAY_SIZE(default_init_data);
1201         }
1202 
1203         for (i = 0; i < num_init_data; i++) {
1204                 enum max77693_irq_source irq_src
1205                                 = MAX77693_IRQ_GROUP_NR;
1206 
1207                 regmap_write(info->max77693->regmap_muic,
1208                                 init_data[i].addr,
1209                                 init_data[i].data);
1210 
1211                 switch (init_data[i].addr) {
1212                 case MAX77693_MUIC_REG_INTMASK1:
1213                         irq_src = MUIC_INT1;
1214                         break;
1215                 case MAX77693_MUIC_REG_INTMASK2:
1216                         irq_src = MUIC_INT2;
1217                         break;
1218                 case MAX77693_MUIC_REG_INTMASK3:
1219                         irq_src = MUIC_INT3;
1220                         break;
1221                 }
1222 
1223                 if (irq_src < MAX77693_IRQ_GROUP_NR)
1224                         info->max77693->irq_masks_cur[irq_src]
1225                                 = init_data[i].data;
1226         }
1227 
1228         if (pdata && pdata->muic_data) {
1229                 struct max77693_muic_platform_data *muic_pdata
1230                                                    = pdata->muic_data;
1231 
1232                 /*
1233                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1234                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1235                  */
1236                 if (muic_pdata->path_uart)
1237                         info->path_uart = muic_pdata->path_uart;
1238                 else
1239                         info->path_uart = CONTROL1_SW_UART;
1240 
1241                 if (muic_pdata->path_usb)
1242                         info->path_usb = muic_pdata->path_usb;
1243                 else
1244                         info->path_usb = CONTROL1_SW_USB;
1245 
1246                 /*
1247                  * Default delay time for detecting cable state
1248                  * after certain time.
1249                  */
1250                 if (muic_pdata->detcable_delay_ms)
1251                         delay_jiffies =
1252                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1253                 else
1254                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1255         } else {
1256                 info->path_usb = CONTROL1_SW_USB;
1257                 info->path_uart = CONTROL1_SW_UART;
1258                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1259         }
1260 
1261         /* Set initial path for UART */
1262          max77693_muic_set_path(info, info->path_uart, true);
1263 
1264         /* Check revision number of MUIC device*/
1265         ret = regmap_read(info->max77693->regmap_muic,
1266                         MAX77693_MUIC_REG_ID, &id);
1267         if (ret < 0) {
1268                 dev_err(&pdev->dev, "failed to read revision number\n");
1269                 return ret;
1270         }
1271         dev_info(info->dev, "device ID : 0x%x\n", id);
1272 
1273         /* Set ADC debounce time */
1274         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1275 
1276         /*
1277          * Detect accessory after completing the initialization of platform
1278          *
1279          * - Use delayed workqueue to detect cable state and then
1280          * notify cable state to notifiee/platform through uevent.
1281          * After completing the booting of platform, the extcon provider
1282          * driver should notify cable state to upper layer.
1283          */
1284         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1285         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1286                         delay_jiffies);
1287 
1288         return ret;
1289 }
1290 
1291 static int max77693_muic_remove(struct platform_device *pdev)
1292 {
1293         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1294 
1295         cancel_work_sync(&info->irq_work);
1296         input_unregister_device(info->dock);
1297 
1298         return 0;
1299 }
1300 
1301 static struct platform_driver max77693_muic_driver = {
1302         .driver         = {
1303                 .name   = DEV_NAME,
1304                 .owner  = THIS_MODULE,
1305         },
1306         .probe          = max77693_muic_probe,
1307         .remove         = max77693_muic_remove,
1308 };
1309 
1310 module_platform_driver(max77693_muic_driver);
1311 
1312 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1313 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1314 MODULE_LICENSE("GPL");
1315 MODULE_ALIAS("platform:extcon-max77693");
1316 

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