Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 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

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                 ret = max77693_update_reg(info->max77693->regmap_muic,
259                                           MAX77693_MUIC_REG_CTRL3,
260                                           time << CONTROL3_ADCDBSET_SHIFT,
261                                           CONTROL3_ADCDBSET_MASK);
262                 if (ret) {
263                         dev_err(info->dev, "failed to set ADC debounce time\n");
264                         return ret;
265                 }
266                 break;
267         default:
268                 dev_err(info->dev, "invalid ADC debounce time\n");
269                 return -EINVAL;
270         }
271 
272         return 0;
273 };
274 
275 /*
276  * max77693_muic_set_path - Set hardware line according to attached cable
277  * @info: the instance including private data of max77693 MUIC
278  * @value: the path according to attached cable
279  * @attached: the state of cable (true:attached, false:detached)
280  *
281  * The max77693 MUIC device share outside H/W line among a varity of cables
282  * so, this function set internal path of H/W line according to the type of
283  * attached cable.
284  */
285 static int max77693_muic_set_path(struct max77693_muic_info *info,
286                 u8 val, bool attached)
287 {
288         int ret = 0;
289         u8 ctrl1, ctrl2 = 0;
290 
291         if (attached)
292                 ctrl1 = val;
293         else
294                 ctrl1 = CONTROL1_SW_OPEN;
295 
296         ret = max77693_update_reg(info->max77693->regmap_muic,
297                         MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK);
298         if (ret < 0) {
299                 dev_err(info->dev, "failed to update MUIC register\n");
300                 return ret;
301         }
302 
303         if (attached)
304                 ctrl2 |= CONTROL2_CPEN_MASK;    /* LowPwr=0, CPEn=1 */
305         else
306                 ctrl2 |= CONTROL2_LOWPWR_MASK;  /* LowPwr=1, CPEn=0 */
307 
308         ret = max77693_update_reg(info->max77693->regmap_muic,
309                         MAX77693_MUIC_REG_CTRL2, ctrl2,
310                         CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
311         if (ret < 0) {
312                 dev_err(info->dev, "failed to update MUIC register\n");
313                 return ret;
314         }
315 
316         dev_info(info->dev,
317                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
318                 ctrl1, ctrl2, attached ? "attached" : "detached");
319 
320         return 0;
321 }
322 
323 /*
324  * max77693_muic_get_cable_type - Return cable type and check cable state
325  * @info: the instance including private data of max77693 MUIC
326  * @group: the path according to attached cable
327  * @attached: store cable state and return
328  *
329  * This function check the cable state either attached or detached,
330  * and then divide precise type of cable according to cable group.
331  *      - MAX77693_CABLE_GROUP_ADC
332  *      - MAX77693_CABLE_GROUP_ADC_GND
333  *      - MAX77693_CABLE_GROUP_CHG
334  *      - MAX77693_CABLE_GROUP_VBVOLT
335  */
336 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
337                 enum max77693_muic_cable_group group, bool *attached)
338 {
339         int cable_type = 0;
340         int adc;
341         int adc1k;
342         int adclow;
343         int vbvolt;
344         int chg_type;
345 
346         switch (group) {
347         case MAX77693_CABLE_GROUP_ADC:
348                 /*
349                  * Read ADC value to check cable type and decide cable state
350                  * according to cable type
351                  */
352                 adc = info->status[0] & STATUS1_ADC_MASK;
353                 adc >>= STATUS1_ADC_SHIFT;
354 
355                 /*
356                  * Check current cable state/cable type and store cable type
357                  * (info->prev_cable_type) for handling cable when cable is
358                  * detached.
359                  */
360                 if (adc == MAX77693_MUIC_ADC_OPEN) {
361                         *attached = false;
362 
363                         cable_type = info->prev_cable_type;
364                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
365                 } else {
366                         *attached = true;
367 
368                         cable_type = info->prev_cable_type = adc;
369                 }
370                 break;
371         case MAX77693_CABLE_GROUP_ADC_GND:
372                 /*
373                  * Read ADC value to check cable type and decide cable state
374                  * according to cable type
375                  */
376                 adc = info->status[0] & STATUS1_ADC_MASK;
377                 adc >>= STATUS1_ADC_SHIFT;
378 
379                 /*
380                  * Check current cable state/cable type and store cable type
381                  * (info->prev_cable_type/_gnd) for handling cable when cable
382                  * is detached.
383                  */
384                 if (adc == MAX77693_MUIC_ADC_OPEN) {
385                         *attached = false;
386 
387                         cable_type = info->prev_cable_type_gnd;
388                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
389                 } else {
390                         *attached = true;
391 
392                         adclow = info->status[0] & STATUS1_ADCLOW_MASK;
393                         adclow >>= STATUS1_ADCLOW_SHIFT;
394                         adc1k = info->status[0] & STATUS1_ADC1K_MASK;
395                         adc1k >>= STATUS1_ADC1K_SHIFT;
396 
397                         vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
398                         vbvolt >>= STATUS2_VBVOLT_SHIFT;
399 
400                         /**
401                          * [0x1|VBVolt|ADCLow|ADC1K]
402                          * [0x1|     0|     0|    0] USB_OTG
403                          * [0x1|     1|     0|    0] USB_OTG_VB
404                          * [0x1|     0|     1|    0] Audio Video cable with load
405                          * [0x1|     0|     1|    1] MHL without charging cable
406                          * [0x1|     1|     1|    1] MHL with charging cable
407                          */
408                         cable_type = ((0x1 << 8)
409                                         | (vbvolt << 2)
410                                         | (adclow << 1)
411                                         | adc1k);
412 
413                         info->prev_cable_type = adc;
414                         info->prev_cable_type_gnd = cable_type;
415                 }
416 
417                 break;
418         case MAX77693_CABLE_GROUP_CHG:
419                 /*
420                  * Read charger type to check cable type and decide cable state
421                  * according to type of charger cable.
422                  */
423                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
424                 chg_type >>= STATUS2_CHGTYP_SHIFT;
425 
426                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
427                         *attached = false;
428 
429                         cable_type = info->prev_chg_type;
430                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
431                 } else {
432                         *attached = true;
433 
434                         /*
435                          * Check current cable state/cable type and store cable
436                          * type(info->prev_chg_type) for handling cable when
437                          * charger cable is detached.
438                          */
439                         cable_type = info->prev_chg_type = chg_type;
440                 }
441 
442                 break;
443         case MAX77693_CABLE_GROUP_VBVOLT:
444                 /*
445                  * Read ADC value to check cable type and decide cable state
446                  * according to cable type
447                  */
448                 adc = info->status[0] & STATUS1_ADC_MASK;
449                 adc >>= STATUS1_ADC_SHIFT;
450                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
451                 chg_type >>= STATUS2_CHGTYP_SHIFT;
452 
453                 if (adc == MAX77693_MUIC_ADC_OPEN
454                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
455                         *attached = false;
456                 else
457                         *attached = true;
458 
459                 /*
460                  * Read vbvolt field, if vbvolt is 1,
461                  * this cable is used for charging.
462                  */
463                 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
464                 vbvolt >>= STATUS2_VBVOLT_SHIFT;
465 
466                 cable_type = vbvolt;
467                 break;
468         default:
469                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
470                 cable_type = -EINVAL;
471                 break;
472         }
473 
474         return cable_type;
475 }
476 
477 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
478                 int cable_type, bool attached)
479 {
480         int ret = 0;
481         int vbvolt;
482         bool cable_attached;
483         char dock_name[CABLE_NAME_MAX];
484 
485         dev_info(info->dev,
486                 "external connector is %s (adc:0x%02x)\n",
487                 attached ? "attached" : "detached", cable_type);
488 
489         switch (cable_type) {
490         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
491                 /*
492                  * Check power cable whether attached or detached state.
493                  * The Dock-Smart device need surely external power supply.
494                  * If power cable(USB/TA) isn't connected to Dock device,
495                  * user can't use Dock-Smart for desktop mode.
496                  */
497                 vbvolt = max77693_muic_get_cable_type(info,
498                                 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
499                 if (attached && !vbvolt) {
500                         dev_warn(info->dev,
501                                 "Cannot detect external power supply\n");
502                         return 0;
503                 }
504 
505                 /*
506                  * Notify Dock-Smart/MHL state.
507                  * - Dock-Smart device include three type of cable which
508                  * are HDMI, USB for mouse/keyboard and micro-usb port
509                  * for USB/TA cable. Dock-Smart device need always exteranl
510                  * power supply(USB/TA cable through micro-usb cable). Dock-
511                  * Smart device support screen output of target to separate
512                  * monitor and mouse/keyboard for desktop mode.
513                  *
514                  * Features of 'USB/TA cable with Dock-Smart device'
515                  * - Support MHL
516                  * - Support external output feature of audio
517                  * - Support charging through micro-usb port without data
518                  *           connection if TA cable is connected to target.
519                  * - Support charging and data connection through micro-usb port
520                  *           if USB cable is connected between target and host
521                  *           device.
522                  * - Support OTG device (Mouse/Keyboard)
523                  */
524                 ret = max77693_muic_set_path(info, info->path_usb, attached);
525                 if (ret < 0)
526                         return ret;
527 
528                 extcon_set_cable_state(info->edev, "Dock-Smart", attached);
529                 extcon_set_cable_state(info->edev, "MHL", attached);
530                 goto out;
531         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* Dock-Car */
532                 strcpy(dock_name, "Dock-Car");
533                 break;
534         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
535                 strcpy(dock_name, "Dock-Desk");
536                 break;
537         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
538                 strcpy(dock_name, "Dock-Audio");
539                 if (!attached)
540                         extcon_set_cable_state(info->edev, "USB", false);
541                 break;
542         default:
543                 dev_err(info->dev, "failed to detect %s dock device\n",
544                         attached ? "attached" : "detached");
545                 return -EINVAL;
546         }
547 
548         /* Dock-Car/Desk/Audio, PATH:AUDIO */
549         ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
550         if (ret < 0)
551                 return ret;
552         extcon_set_cable_state(info->edev, dock_name, attached);
553 
554 out:
555         return 0;
556 }
557 
558 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
559                 int button_type, bool attached)
560 {
561         struct input_dev *dock = info->dock;
562         unsigned int code;
563 
564         switch (button_type) {
565         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
566                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
567                 /* DOCK_KEY_PREV */
568                 code = KEY_PREVIOUSSONG;
569                 break;
570         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
571                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
572                 /* DOCK_KEY_NEXT */
573                 code = KEY_NEXTSONG;
574                 break;
575         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
576                 /* DOCK_VOL_DOWN */
577                 code = KEY_VOLUMEDOWN;
578                 break;
579         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
580                 /* DOCK_VOL_UP */
581                 code = KEY_VOLUMEUP;
582                 break;
583         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
584                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
585                 /* DOCK_KEY_PLAY_PAUSE */
586                 code = KEY_PLAYPAUSE;
587                 break;
588         default:
589                 dev_err(info->dev,
590                         "failed to detect %s key (adc:0x%x)\n",
591                         attached ? "pressed" : "released", button_type);
592                 return -EINVAL;
593         }
594 
595         input_event(dock, EV_KEY, code, attached);
596         input_sync(dock);
597 
598         return 0;
599 }
600 
601 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
602 {
603         int cable_type_gnd;
604         int ret = 0;
605         bool attached;
606 
607         cable_type_gnd = max77693_muic_get_cable_type(info,
608                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
609 
610         switch (cable_type_gnd) {
611         case MAX77693_MUIC_GND_USB_OTG:
612         case MAX77693_MUIC_GND_USB_OTG_VB:
613                 /* USB_OTG, PATH: AP_USB */
614                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
615                 if (ret < 0)
616                         return ret;
617                 extcon_set_cable_state(info->edev, "USB-Host", attached);
618                 break;
619         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
620                 /* Audio Video Cable with load, PATH:AUDIO */
621                 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
622                 if (ret < 0)
623                         return ret;
624                 extcon_set_cable_state(info->edev,
625                                 "Audio-video-load", attached);
626                 break;
627         case MAX77693_MUIC_GND_MHL:
628         case MAX77693_MUIC_GND_MHL_VB:
629                 /* MHL or MHL with USB/TA cable */
630                 extcon_set_cable_state(info->edev, "MHL", attached);
631                 break;
632         default:
633                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
634                         attached ? "attached" : "detached");
635                 return -EINVAL;
636         }
637 
638         return 0;
639 }
640 
641 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
642                 int cable_type, bool attached)
643 {
644         char cable_name[32];
645         int ret = 0;
646         u8 path = CONTROL1_SW_OPEN;
647 
648         dev_info(info->dev,
649                 "external connector is %s (adc:0x%02x)\n",
650                 attached ? "attached" : "detached", cable_type);
651 
652         switch (cable_type) {
653         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
654                 /* PATH:AP_USB */
655                 strcpy(cable_name, "JIG-USB-OFF");
656                 path = CONTROL1_SW_USB;
657                 break;
658         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
659                 /* PATH:AP_USB */
660                 strcpy(cable_name, "JIG-USB-ON");
661                 path = CONTROL1_SW_USB;
662                 break;
663         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
664                 /* PATH:AP_UART */
665                 strcpy(cable_name, "JIG-UART-OFF");
666                 path = CONTROL1_SW_UART;
667                 break;
668         default:
669                 dev_err(info->dev, "failed to detect %s jig cable\n",
670                         attached ? "attached" : "detached");
671                 return -EINVAL;
672         }
673 
674         ret = max77693_muic_set_path(info, path, attached);
675         if (ret < 0)
676                 return ret;
677 
678         extcon_set_cable_state(info->edev, cable_name, attached);
679 
680         return 0;
681 }
682 
683 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
684 {
685         int cable_type;
686         int button_type;
687         bool attached;
688         int ret = 0;
689 
690         /* Check accessory state which is either detached or attached */
691         cable_type = max77693_muic_get_cable_type(info,
692                                 MAX77693_CABLE_GROUP_ADC, &attached);
693 
694         dev_info(info->dev,
695                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
696                 attached ? "attached" : "detached", cable_type,
697                 info->prev_cable_type);
698 
699         switch (cable_type) {
700         case MAX77693_MUIC_ADC_GROUND:
701                 /* USB_OTG/MHL/Audio */
702                 max77693_muic_adc_ground_handler(info);
703                 break;
704         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
705         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
706         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
707                 /* JIG */
708                 ret = max77693_muic_jig_handler(info, cable_type, attached);
709                 if (ret < 0)
710                         return ret;
711                 break;
712         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
713         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* Dock-Car */
714         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
715         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
716                 /*
717                  * DOCK device
718                  *
719                  * The MAX77693 MUIC device can detect total 34 cable type
720                  * except of charger cable and MUIC device didn't define
721                  * specfic role of cable in the range of from 0x01 to 0x12
722                  * of ADC value. So, can use/define cable with no role according
723                  * to schema of hardware board.
724                  */
725                 ret = max77693_muic_dock_handler(info, cable_type, attached);
726                 if (ret < 0)
727                         return ret;
728                 break;
729         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
730         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
731         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
732         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
733         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
734                 /*
735                  * Button of DOCK device
736                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
737                  *
738                  * The MAX77693 MUIC device can detect total 34 cable type
739                  * except of charger cable and MUIC device didn't define
740                  * specfic role of cable in the range of from 0x01 to 0x12
741                  * of ADC value. So, can use/define cable with no role according
742                  * to schema of hardware board.
743                  */
744                 if (attached)
745                         button_type = info->prev_button_type = cable_type;
746                 else
747                         button_type = info->prev_button_type;
748 
749                 ret = max77693_muic_dock_button_handler(info, button_type,
750                                                         attached);
751                 if (ret < 0)
752                         return ret;
753                 break;
754         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
755         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
756         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
757         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
758         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
759         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
760         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
761         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
762         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
763         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
764         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
765         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
766         case MAX77693_MUIC_ADC_CEA936_AUDIO:
767         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
768         case MAX77693_MUIC_ADC_TTY_CONVERTER:
769         case MAX77693_MUIC_ADC_UART_CABLE:
770         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
771         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
772                 /*
773                  * This accessory isn't used in general case if it is specially
774                  * needed to detect additional accessory, should implement
775                  * proper operation when this accessory is attached/detached.
776                  */
777                 dev_info(info->dev,
778                         "accessory is %s but it isn't used (adc:0x%x)\n",
779                         attached ? "attached" : "detached", cable_type);
780                 return -EAGAIN;
781         default:
782                 dev_err(info->dev,
783                         "failed to detect %s accessory (adc:0x%x)\n",
784                         attached ? "attached" : "detached", cable_type);
785                 return -EINVAL;
786         }
787 
788         return 0;
789 }
790 
791 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
792 {
793         int chg_type;
794         int cable_type_gnd;
795         int cable_type;
796         bool attached;
797         bool cable_attached;
798         int ret = 0;
799 
800         chg_type = max77693_muic_get_cable_type(info,
801                                 MAX77693_CABLE_GROUP_CHG, &attached);
802 
803         dev_info(info->dev,
804                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
805                         attached ? "attached" : "detached",
806                         chg_type, info->prev_chg_type);
807 
808         switch (chg_type) {
809         case MAX77693_CHARGER_TYPE_USB:
810         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
811         case MAX77693_CHARGER_TYPE_NONE:
812                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
813                 cable_type_gnd = max77693_muic_get_cable_type(info,
814                                         MAX77693_CABLE_GROUP_ADC_GND,
815                                         &cable_attached);
816                 switch (cable_type_gnd) {
817                 case MAX77693_MUIC_GND_MHL:
818                 case MAX77693_MUIC_GND_MHL_VB:
819                         /*
820                          * MHL cable with MHL_TA(USB/TA) cable
821                          * - MHL cable include two port(HDMI line and separate
822                          * micro-usb port. When the target connect MHL cable,
823                          * extcon driver check whether MHL_TA(USB/TA) cable is
824                          * connected. If MHL_TA cable is connected, extcon
825                          * driver notify state to notifiee for charging battery.
826                          *
827                          * Features of 'MHL_TA(USB/TA) with MHL cable'
828                          * - Support MHL
829                          * - Support charging through micro-usb port without
830                          *   data connection
831                          */
832                         extcon_set_cable_state(info->edev, "MHL_TA", attached);
833                         if (!cable_attached)
834                                 extcon_set_cable_state(info->edev,
835                                                       "MHL", cable_attached);
836                         break;
837                 }
838 
839                 /* Check MAX77693_CABLE_GROUP_ADC type */
840                 cable_type = max77693_muic_get_cable_type(info,
841                                         MAX77693_CABLE_GROUP_ADC,
842                                         &cable_attached);
843                 switch (cable_type) {
844                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
845                         /*
846                          * Dock-Audio device with USB/TA cable
847                          * - Dock device include two port(Dock-Audio and micro-
848                          * usb port). When the target connect Dock-Audio device,
849                          * extcon driver check whether USB/TA cable is connected
850                          * or not. If USB/TA cable is connected, extcon driver
851                          * notify state to notifiee for charging battery.
852                          *
853                          * Features of 'USB/TA cable with Dock-Audio device'
854                          * - Support external output feature of audio.
855                          * - Support charging through micro-usb port without
856                          *   data connection.
857                          */
858                         extcon_set_cable_state(info->edev, "USB", attached);
859 
860                         if (!cable_attached)
861                                 extcon_set_cable_state(info->edev, "Dock-Audio",
862                                                       cable_attached);
863                         break;
864                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
865                         /*
866                          * Dock-Smart device with USB/TA cable
867                          * - Dock-Desk device include three type of cable which
868                          * are HDMI, USB for mouse/keyboard and micro-usb port
869                          * for USB/TA cable. Dock-Smart device need always
870                          * exteranl power supply(USB/TA cable through micro-usb
871                          * cable). Dock-Smart device support screen output of
872                          * target to separate monitor and mouse/keyboard for
873                          * desktop mode.
874                          *
875                          * Features of 'USB/TA cable with Dock-Smart device'
876                          * - Support MHL
877                          * - Support external output feature of audio
878                          * - Support charging through micro-usb port without
879                          *   data connection if TA cable is connected to target.
880                          * - Support charging and data connection through micro-
881                          *   usb port if USB cable is connected between target
882                          *   and host device
883                          * - Support OTG device (Mouse/Keyboard)
884                          */
885                         ret = max77693_muic_set_path(info, info->path_usb,
886                                                     attached);
887                         if (ret < 0)
888                                 return ret;
889 
890                         extcon_set_cable_state(info->edev, "Dock-Smart",
891                                               attached);
892                         extcon_set_cable_state(info->edev, "MHL", attached);
893 
894                         break;
895                 }
896 
897                 /* Check MAX77693_CABLE_GROUP_CHG type */
898                 switch (chg_type) {
899                 case MAX77693_CHARGER_TYPE_NONE:
900                         /*
901                          * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
902                          * cable is attached, muic device happen below two irq.
903                          * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
904                          *    MHL/Dock-Audio.
905                          * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
906                          *    USB/TA cable connected to MHL or Dock-Audio.
907                          * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
908                          * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
909                          *
910                          * If user attach MHL (with USB/TA cable and immediately
911                          * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
912                          * _INT2_CHGTYP irq is happened, USB/TA cable remain
913                          * connected state to target. But USB/TA cable isn't
914                          * connected to target. The user be face with unusual
915                          * action. So, driver should check this situation in
916                          * spite of, that previous charger type is N/A.
917                          */
918                         break;
919                 case MAX77693_CHARGER_TYPE_USB:
920                         /* Only USB cable, PATH:AP_USB */
921                         ret = max77693_muic_set_path(info, info->path_usb,
922                                                     attached);
923                         if (ret < 0)
924                                 return ret;
925 
926                         extcon_set_cable_state(info->edev, "USB", attached);
927                         break;
928                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
929                         /* Only TA cable */
930                         extcon_set_cable_state(info->edev, "TA", attached);
931                         break;
932                 }
933                 break;
934         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
935                 extcon_set_cable_state(info->edev,
936                                 "Charge-downstream", attached);
937                 break;
938         case MAX77693_CHARGER_TYPE_APPLE_500MA:
939                 extcon_set_cable_state(info->edev, "Slow-charger", attached);
940                 break;
941         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
942                 extcon_set_cable_state(info->edev, "Fast-charger", attached);
943                 break;
944         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
945                 break;
946         default:
947                 dev_err(info->dev,
948                         "failed to detect %s accessory (chg_type:0x%x)\n",
949                         attached ? "attached" : "detached", chg_type);
950                 return -EINVAL;
951         }
952 
953         return 0;
954 }
955 
956 static void max77693_muic_irq_work(struct work_struct *work)
957 {
958         struct max77693_muic_info *info = container_of(work,
959                         struct max77693_muic_info, irq_work);
960         int irq_type = -1;
961         int i, ret = 0;
962 
963         if (!info->edev)
964                 return;
965 
966         mutex_lock(&info->mutex);
967 
968         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
969                 if (info->irq == muic_irqs[i].virq)
970                         irq_type = muic_irqs[i].irq;
971 
972         ret = max77693_bulk_read(info->max77693->regmap_muic,
973                         MAX77693_MUIC_REG_STATUS1, 2, info->status);
974         if (ret) {
975                 dev_err(info->dev, "failed to read MUIC register\n");
976                 mutex_unlock(&info->mutex);
977                 return;
978         }
979 
980         switch (irq_type) {
981         case MAX77693_MUIC_IRQ_INT1_ADC:
982         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
983         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
984         case MAX77693_MUIC_IRQ_INT1_ADC1K:
985                 /* Handle all of accessory except for
986                    type of charger accessory */
987                 ret = max77693_muic_adc_handler(info);
988                 break;
989         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
990         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
991         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
992         case MAX77693_MUIC_IRQ_INT2_DXOVP:
993         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
994         case MAX77693_MUIC_IRQ_INT2_VIDRM:
995                 /* Handle charger accessory */
996                 ret = max77693_muic_chg_handler(info);
997                 break;
998         case MAX77693_MUIC_IRQ_INT3_EOC:
999         case MAX77693_MUIC_IRQ_INT3_CGMBC:
1000         case MAX77693_MUIC_IRQ_INT3_OVP:
1001         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
1002         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
1003         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
1004                 break;
1005         default:
1006                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
1007                                 irq_type);
1008                 mutex_unlock(&info->mutex);
1009                 return;
1010         }
1011 
1012         if (ret < 0)
1013                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
1014 
1015         mutex_unlock(&info->mutex);
1016 
1017         return;
1018 }
1019 
1020 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1021 {
1022         struct max77693_muic_info *info = data;
1023 
1024         info->irq = irq;
1025         schedule_work(&info->irq_work);
1026 
1027         return IRQ_HANDLED;
1028 }
1029 
1030 static struct regmap_config max77693_muic_regmap_config = {
1031         .reg_bits = 8,
1032         .val_bits = 8,
1033 };
1034 
1035 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1036 {
1037         int ret = 0;
1038         int adc;
1039         int chg_type;
1040         bool attached;
1041 
1042         mutex_lock(&info->mutex);
1043 
1044         /* Read STATUSx register to detect accessory */
1045         ret = max77693_bulk_read(info->max77693->regmap_muic,
1046                         MAX77693_MUIC_REG_STATUS1, 2, info->status);
1047         if (ret) {
1048                 dev_err(info->dev, "failed to read MUIC register\n");
1049                 mutex_unlock(&info->mutex);
1050                 return ret;
1051         }
1052 
1053         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1054                                         &attached);
1055         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1056                 ret = max77693_muic_adc_handler(info);
1057                 if (ret < 0) {
1058                         dev_err(info->dev, "Cannot detect accessory\n");
1059                         mutex_unlock(&info->mutex);
1060                         return ret;
1061                 }
1062         }
1063 
1064         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1065                                         &attached);
1066         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1067                 ret = max77693_muic_chg_handler(info);
1068                 if (ret < 0) {
1069                         dev_err(info->dev, "Cannot detect charger accessory\n");
1070                         mutex_unlock(&info->mutex);
1071                         return ret;
1072                 }
1073         }
1074 
1075         mutex_unlock(&info->mutex);
1076 
1077         return 0;
1078 }
1079 
1080 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1081 {
1082         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1083                                 struct max77693_muic_info, wq_detcable);
1084 
1085         max77693_muic_detect_accessory(info);
1086 }
1087 
1088 static int max77693_muic_probe(struct platform_device *pdev)
1089 {
1090         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1091         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1092         struct max77693_muic_info *info;
1093         struct max77693_reg_data *init_data;
1094         int num_init_data;
1095         int delay_jiffies;
1096         int ret;
1097         int i;
1098         u8 id;
1099 
1100         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1101                                    GFP_KERNEL);
1102         if (!info) {
1103                 dev_err(&pdev->dev, "failed to allocate memory\n");
1104                 return -ENOMEM;
1105         }
1106         info->dev = &pdev->dev;
1107         info->max77693 = max77693;
1108         if (info->max77693->regmap_muic) {
1109                 dev_dbg(&pdev->dev, "allocate register map\n");
1110         } else {
1111                 info->max77693->regmap_muic = devm_regmap_init_i2c(
1112                                                 info->max77693->muic,
1113                                                 &max77693_muic_regmap_config);
1114                 if (IS_ERR(info->max77693->regmap_muic)) {
1115                         ret = PTR_ERR(info->max77693->regmap_muic);
1116                         dev_err(max77693->dev,
1117                                 "failed to allocate register map: %d\n", ret);
1118                         return ret;
1119                 }
1120         }
1121 
1122         /* Register input device for button of dock device */
1123         info->dock = devm_input_allocate_device(&pdev->dev);
1124         if (!info->dock) {
1125                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1126                 return -ENOMEM;
1127         }
1128         info->dock->name = "max77693-muic/dock";
1129         info->dock->phys = "max77693-muic/extcon";
1130         info->dock->dev.parent = &pdev->dev;
1131 
1132         __set_bit(EV_REP, info->dock->evbit);
1133 
1134         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1135         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1136         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1137         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1138         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1139 
1140         ret = input_register_device(info->dock);
1141         if (ret < 0) {
1142                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1143                                 ret);
1144                 return ret;
1145         }
1146 
1147         platform_set_drvdata(pdev, info);
1148         mutex_init(&info->mutex);
1149 
1150         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1151 
1152         /* Support irq domain for MAX77693 MUIC device */
1153         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1154                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1155                 unsigned int virq = 0;
1156 
1157                 virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq);
1158                 if (!virq) {
1159                         ret = -EINVAL;
1160                         goto err_irq;
1161                 }
1162                 muic_irq->virq = virq;
1163 
1164                 ret = request_threaded_irq(virq, NULL,
1165                                 max77693_muic_irq_handler,
1166                                 IRQF_NO_SUSPEND,
1167                                 muic_irq->name, info);
1168                 if (ret) {
1169                         dev_err(&pdev->dev,
1170                                 "failed: irq request (IRQ: %d,"
1171                                 " error :%d)\n",
1172                                 muic_irq->irq, ret);
1173                         goto err_irq;
1174                 }
1175         }
1176 
1177         /* Initialize extcon device */
1178         info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev),
1179                                   GFP_KERNEL);
1180         if (!info->edev) {
1181                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1182                 ret = -ENOMEM;
1183                 goto err_irq;
1184         }
1185         info->edev->name = DEV_NAME;
1186         info->edev->dev.parent = &pdev->dev;
1187         info->edev->supported_cable = max77693_extcon_cable;
1188         ret = extcon_dev_register(info->edev);
1189         if (ret) {
1190                 dev_err(&pdev->dev, "failed to register extcon device\n");
1191                 goto err_irq;
1192         }
1193 
1194 
1195         /* Initialize MUIC register by using platform data or default data */
1196         if (pdata->muic_data) {
1197                 init_data = pdata->muic_data->init_data;
1198                 num_init_data = pdata->muic_data->num_init_data;
1199         } else {
1200                 init_data = default_init_data;
1201                 num_init_data = ARRAY_SIZE(default_init_data);
1202         }
1203 
1204         for (i = 0; i < num_init_data; i++) {
1205                 enum max77693_irq_source irq_src
1206                                 = MAX77693_IRQ_GROUP_NR;
1207 
1208                 max77693_write_reg(info->max77693->regmap_muic,
1209                                 init_data[i].addr,
1210                                 init_data[i].data);
1211 
1212                 switch (init_data[i].addr) {
1213                 case MAX77693_MUIC_REG_INTMASK1:
1214                         irq_src = MUIC_INT1;
1215                         break;
1216                 case MAX77693_MUIC_REG_INTMASK2:
1217                         irq_src = MUIC_INT2;
1218                         break;
1219                 case MAX77693_MUIC_REG_INTMASK3:
1220                         irq_src = MUIC_INT3;
1221                         break;
1222                 }
1223 
1224                 if (irq_src < MAX77693_IRQ_GROUP_NR)
1225                         info->max77693->irq_masks_cur[irq_src]
1226                                 = init_data[i].data;
1227         }
1228 
1229         if (pdata->muic_data) {
1230                 struct max77693_muic_platform_data *muic_pdata
1231                                                    = pdata->muic_data;
1232 
1233                 /*
1234                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1235                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1236                  */
1237                 if (muic_pdata->path_uart)
1238                         info->path_uart = muic_pdata->path_uart;
1239                 else
1240                         info->path_uart = CONTROL1_SW_UART;
1241 
1242                 if (muic_pdata->path_usb)
1243                         info->path_usb = muic_pdata->path_usb;
1244                 else
1245                         info->path_usb = CONTROL1_SW_USB;
1246 
1247                 /*
1248                  * Default delay time for detecting cable state
1249                  * after certain time.
1250                  */
1251                 if (muic_pdata->detcable_delay_ms)
1252                         delay_jiffies =
1253                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1254                 else
1255                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1256         } else {
1257                 info->path_usb = CONTROL1_SW_USB;
1258                 info->path_uart = CONTROL1_SW_UART;
1259                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1260         }
1261 
1262         /* Set initial path for UART */
1263          max77693_muic_set_path(info, info->path_uart, true);
1264 
1265         /* Check revision number of MUIC device*/
1266         ret = max77693_read_reg(info->max77693->regmap_muic,
1267                         MAX77693_MUIC_REG_ID, &id);
1268         if (ret < 0) {
1269                 dev_err(&pdev->dev, "failed to read revision number\n");
1270                 goto err_extcon;
1271         }
1272         dev_info(info->dev, "device ID : 0x%x\n", id);
1273 
1274         /* Set ADC debounce time */
1275         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1276 
1277         /*
1278          * Detect accessory after completing the initialization of platform
1279          *
1280          * - Use delayed workqueue to detect cable state and then
1281          * notify cable state to notifiee/platform through uevent.
1282          * After completing the booting of platform, the extcon provider
1283          * driver should notify cable state to upper layer.
1284          */
1285         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1286         schedule_delayed_work(&info->wq_detcable, delay_jiffies);
1287 
1288         return ret;
1289 
1290 err_extcon:
1291         extcon_dev_unregister(info->edev);
1292 err_irq:
1293         while (--i >= 0)
1294                 free_irq(muic_irqs[i].virq, info);
1295         return ret;
1296 }
1297 
1298 static int max77693_muic_remove(struct platform_device *pdev)
1299 {
1300         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1301         int i;
1302 
1303         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
1304                 free_irq(muic_irqs[i].virq, info);
1305         cancel_work_sync(&info->irq_work);
1306         input_unregister_device(info->dock);
1307         extcon_dev_unregister(info->edev);
1308 
1309         return 0;
1310 }
1311 
1312 static struct platform_driver max77693_muic_driver = {
1313         .driver         = {
1314                 .name   = DEV_NAME,
1315                 .owner  = THIS_MODULE,
1316         },
1317         .probe          = max77693_muic_probe,
1318         .remove         = max77693_muic_remove,
1319 };
1320 
1321 module_platform_driver(max77693_muic_driver);
1322 
1323 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1324 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1325 MODULE_LICENSE("GPL");
1326 MODULE_ALIAS("platform:extcon-max77693");
1327 

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