Version:  2.0.40 2.2.26 2.4.37 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 3.19

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]              = "JIG-UART-ON",
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_AUDIO_MODE_REMOTE:       /* Dock-Desk */
536                 strcpy(dock_name, "Dock-Desk");
537                 break;
538         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
539                 strcpy(dock_name, "Dock-Audio");
540                 if (!attached)
541                         extcon_set_cable_state(info->edev, "USB", false);
542                 break;
543         default:
544                 dev_err(info->dev, "failed to detect %s dock device\n",
545                         attached ? "attached" : "detached");
546                 return -EINVAL;
547         }
548 
549         /* Dock-Car/Desk/Audio, PATH:AUDIO */
550         ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
551         if (ret < 0)
552                 return ret;
553         extcon_set_cable_state(info->edev, dock_name, attached);
554 
555 out:
556         return 0;
557 }
558 
559 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
560                 int button_type, bool attached)
561 {
562         struct input_dev *dock = info->dock;
563         unsigned int code;
564 
565         switch (button_type) {
566         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
567                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
568                 /* DOCK_KEY_PREV */
569                 code = KEY_PREVIOUSSONG;
570                 break;
571         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
572                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
573                 /* DOCK_KEY_NEXT */
574                 code = KEY_NEXTSONG;
575                 break;
576         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
577                 /* DOCK_VOL_DOWN */
578                 code = KEY_VOLUMEDOWN;
579                 break;
580         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
581                 /* DOCK_VOL_UP */
582                 code = KEY_VOLUMEUP;
583                 break;
584         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
585                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
586                 /* DOCK_KEY_PLAY_PAUSE */
587                 code = KEY_PLAYPAUSE;
588                 break;
589         default:
590                 dev_err(info->dev,
591                         "failed to detect %s key (adc:0x%x)\n",
592                         attached ? "pressed" : "released", button_type);
593                 return -EINVAL;
594         }
595 
596         input_event(dock, EV_KEY, code, attached);
597         input_sync(dock);
598 
599         return 0;
600 }
601 
602 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
603 {
604         int cable_type_gnd;
605         int ret = 0;
606         bool attached;
607 
608         cable_type_gnd = max77693_muic_get_cable_type(info,
609                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
610 
611         switch (cable_type_gnd) {
612         case MAX77693_MUIC_GND_USB_OTG:
613         case MAX77693_MUIC_GND_USB_OTG_VB:
614                 /* USB_OTG, PATH: AP_USB */
615                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
616                 if (ret < 0)
617                         return ret;
618                 extcon_set_cable_state(info->edev, "USB-Host", attached);
619                 break;
620         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
621                 /* Audio Video Cable with load, PATH:AUDIO */
622                 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
623                 if (ret < 0)
624                         return ret;
625                 extcon_set_cable_state(info->edev,
626                                 "Audio-video-load", attached);
627                 break;
628         case MAX77693_MUIC_GND_MHL:
629         case MAX77693_MUIC_GND_MHL_VB:
630                 /* MHL or MHL with USB/TA cable */
631                 extcon_set_cable_state(info->edev, "MHL", attached);
632                 break;
633         default:
634                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
635                         attached ? "attached" : "detached");
636                 return -EINVAL;
637         }
638 
639         return 0;
640 }
641 
642 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
643                 int cable_type, bool attached)
644 {
645         char cable_name[32];
646         int ret = 0;
647         u8 path = CONTROL1_SW_OPEN;
648 
649         dev_info(info->dev,
650                 "external connector is %s (adc:0x%02x)\n",
651                 attached ? "attached" : "detached", cable_type);
652 
653         switch (cable_type) {
654         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
655                 /* PATH:AP_USB */
656                 strcpy(cable_name, "JIG-USB-OFF");
657                 path = CONTROL1_SW_USB;
658                 break;
659         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
660                 /* PATH:AP_USB */
661                 strcpy(cable_name, "JIG-USB-ON");
662                 path = CONTROL1_SW_USB;
663                 break;
664         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
665                 /* PATH:AP_UART */
666                 strcpy(cable_name, "JIG-UART-OFF");
667                 path = CONTROL1_SW_UART;
668                 break;
669         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* ADC_JIG_UART_ON */
670                 /* PATH:AP_UART */
671                 strcpy(cable_name, "JIG-UART-ON");
672                 path = CONTROL1_SW_UART;
673                 break;
674         default:
675                 dev_err(info->dev, "failed to detect %s jig cable\n",
676                         attached ? "attached" : "detached");
677                 return -EINVAL;
678         }
679 
680         ret = max77693_muic_set_path(info, path, attached);
681         if (ret < 0)
682                 return ret;
683 
684         extcon_set_cable_state(info->edev, cable_name, attached);
685 
686         return 0;
687 }
688 
689 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
690 {
691         int cable_type;
692         int button_type;
693         bool attached;
694         int ret = 0;
695 
696         /* Check accessory state which is either detached or attached */
697         cable_type = max77693_muic_get_cable_type(info,
698                                 MAX77693_CABLE_GROUP_ADC, &attached);
699 
700         dev_info(info->dev,
701                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
702                 attached ? "attached" : "detached", cable_type,
703                 info->prev_cable_type);
704 
705         switch (cable_type) {
706         case MAX77693_MUIC_ADC_GROUND:
707                 /* USB_OTG/MHL/Audio */
708                 max77693_muic_adc_ground_handler(info);
709                 break;
710         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
711         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
712         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
713         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
714                 /* JIG */
715                 ret = max77693_muic_jig_handler(info, cable_type, attached);
716                 if (ret < 0)
717                         return ret;
718                 break;
719         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
720         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
721         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
722                 /*
723                  * DOCK device
724                  *
725                  * The MAX77693 MUIC device can detect total 34 cable type
726                  * except of charger cable and MUIC device didn't define
727                  * specfic role of cable in the range of from 0x01 to 0x12
728                  * of ADC value. So, can use/define cable with no role according
729                  * to schema of hardware board.
730                  */
731                 ret = max77693_muic_dock_handler(info, cable_type, attached);
732                 if (ret < 0)
733                         return ret;
734                 break;
735         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
736         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
737         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
738         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
739         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
740                 /*
741                  * Button of DOCK device
742                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
743                  *
744                  * The MAX77693 MUIC device can detect total 34 cable type
745                  * except of charger cable and MUIC device didn't define
746                  * specfic role of cable in the range of from 0x01 to 0x12
747                  * of ADC value. So, can use/define cable with no role according
748                  * to schema of hardware board.
749                  */
750                 if (attached)
751                         button_type = info->prev_button_type = cable_type;
752                 else
753                         button_type = info->prev_button_type;
754 
755                 ret = max77693_muic_dock_button_handler(info, button_type,
756                                                         attached);
757                 if (ret < 0)
758                         return ret;
759                 break;
760         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
761         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
762         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
763         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
764         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
765         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
766         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
767         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
768         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
769         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
770         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
771         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
772         case MAX77693_MUIC_ADC_CEA936_AUDIO:
773         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
774         case MAX77693_MUIC_ADC_TTY_CONVERTER:
775         case MAX77693_MUIC_ADC_UART_CABLE:
776         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
777         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
778                 /*
779                  * This accessory isn't used in general case if it is specially
780                  * needed to detect additional accessory, should implement
781                  * proper operation when this accessory is attached/detached.
782                  */
783                 dev_info(info->dev,
784                         "accessory is %s but it isn't used (adc:0x%x)\n",
785                         attached ? "attached" : "detached", cable_type);
786                 return -EAGAIN;
787         default:
788                 dev_err(info->dev,
789                         "failed to detect %s accessory (adc:0x%x)\n",
790                         attached ? "attached" : "detached", cable_type);
791                 return -EINVAL;
792         }
793 
794         return 0;
795 }
796 
797 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
798 {
799         int chg_type;
800         int cable_type_gnd;
801         int cable_type;
802         bool attached;
803         bool cable_attached;
804         int ret = 0;
805 
806         chg_type = max77693_muic_get_cable_type(info,
807                                 MAX77693_CABLE_GROUP_CHG, &attached);
808 
809         dev_info(info->dev,
810                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
811                         attached ? "attached" : "detached",
812                         chg_type, info->prev_chg_type);
813 
814         switch (chg_type) {
815         case MAX77693_CHARGER_TYPE_USB:
816         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
817         case MAX77693_CHARGER_TYPE_NONE:
818                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
819                 cable_type_gnd = max77693_muic_get_cable_type(info,
820                                         MAX77693_CABLE_GROUP_ADC_GND,
821                                         &cable_attached);
822                 switch (cable_type_gnd) {
823                 case MAX77693_MUIC_GND_MHL:
824                 case MAX77693_MUIC_GND_MHL_VB:
825                         /*
826                          * MHL cable with MHL_TA(USB/TA) cable
827                          * - MHL cable include two port(HDMI line and separate
828                          * micro-usb port. When the target connect MHL cable,
829                          * extcon driver check whether MHL_TA(USB/TA) cable is
830                          * connected. If MHL_TA cable is connected, extcon
831                          * driver notify state to notifiee for charging battery.
832                          *
833                          * Features of 'MHL_TA(USB/TA) with MHL cable'
834                          * - Support MHL
835                          * - Support charging through micro-usb port without
836                          *   data connection
837                          */
838                         extcon_set_cable_state(info->edev, "MHL_TA", attached);
839                         if (!cable_attached)
840                                 extcon_set_cable_state(info->edev,
841                                                       "MHL", cable_attached);
842                         break;
843                 }
844 
845                 /* Check MAX77693_CABLE_GROUP_ADC type */
846                 cable_type = max77693_muic_get_cable_type(info,
847                                         MAX77693_CABLE_GROUP_ADC,
848                                         &cable_attached);
849                 switch (cable_type) {
850                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
851                         /*
852                          * Dock-Audio device with USB/TA cable
853                          * - Dock device include two port(Dock-Audio and micro-
854                          * usb port). When the target connect Dock-Audio device,
855                          * extcon driver check whether USB/TA cable is connected
856                          * or not. If USB/TA cable is connected, extcon driver
857                          * notify state to notifiee for charging battery.
858                          *
859                          * Features of 'USB/TA cable with Dock-Audio device'
860                          * - Support external output feature of audio.
861                          * - Support charging through micro-usb port without
862                          *   data connection.
863                          */
864                         extcon_set_cable_state(info->edev, "USB", attached);
865 
866                         if (!cable_attached)
867                                 extcon_set_cable_state(info->edev, "Dock-Audio",
868                                                       cable_attached);
869                         break;
870                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
871                         /*
872                          * Dock-Smart device with USB/TA cable
873                          * - Dock-Desk device include three type of cable which
874                          * are HDMI, USB for mouse/keyboard and micro-usb port
875                          * for USB/TA cable. Dock-Smart device need always
876                          * exteranl power supply(USB/TA cable through micro-usb
877                          * cable). Dock-Smart device support screen output of
878                          * target to separate monitor and mouse/keyboard for
879                          * desktop mode.
880                          *
881                          * Features of 'USB/TA cable with Dock-Smart device'
882                          * - Support MHL
883                          * - Support external output feature of audio
884                          * - Support charging through micro-usb port without
885                          *   data connection if TA cable is connected to target.
886                          * - Support charging and data connection through micro-
887                          *   usb port if USB cable is connected between target
888                          *   and host device
889                          * - Support OTG device (Mouse/Keyboard)
890                          */
891                         ret = max77693_muic_set_path(info, info->path_usb,
892                                                     attached);
893                         if (ret < 0)
894                                 return ret;
895 
896                         extcon_set_cable_state(info->edev, "Dock-Smart",
897                                               attached);
898                         extcon_set_cable_state(info->edev, "MHL", attached);
899 
900                         break;
901                 }
902 
903                 /* Check MAX77693_CABLE_GROUP_CHG type */
904                 switch (chg_type) {
905                 case MAX77693_CHARGER_TYPE_NONE:
906                         /*
907                          * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
908                          * cable is attached, muic device happen below two irq.
909                          * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
910                          *    MHL/Dock-Audio.
911                          * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
912                          *    USB/TA cable connected to MHL or Dock-Audio.
913                          * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
914                          * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
915                          *
916                          * If user attach MHL (with USB/TA cable and immediately
917                          * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
918                          * _INT2_CHGTYP irq is happened, USB/TA cable remain
919                          * connected state to target. But USB/TA cable isn't
920                          * connected to target. The user be face with unusual
921                          * action. So, driver should check this situation in
922                          * spite of, that previous charger type is N/A.
923                          */
924                         break;
925                 case MAX77693_CHARGER_TYPE_USB:
926                         /* Only USB cable, PATH:AP_USB */
927                         ret = max77693_muic_set_path(info, info->path_usb,
928                                                     attached);
929                         if (ret < 0)
930                                 return ret;
931 
932                         extcon_set_cable_state(info->edev, "USB", attached);
933                         break;
934                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
935                         /* Only TA cable */
936                         extcon_set_cable_state(info->edev, "TA", attached);
937                         break;
938                 }
939                 break;
940         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
941                 extcon_set_cable_state(info->edev,
942                                 "Charge-downstream", attached);
943                 break;
944         case MAX77693_CHARGER_TYPE_APPLE_500MA:
945                 extcon_set_cable_state(info->edev, "Slow-charger", attached);
946                 break;
947         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
948                 extcon_set_cable_state(info->edev, "Fast-charger", attached);
949                 break;
950         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
951                 break;
952         default:
953                 dev_err(info->dev,
954                         "failed to detect %s accessory (chg_type:0x%x)\n",
955                         attached ? "attached" : "detached", chg_type);
956                 return -EINVAL;
957         }
958 
959         return 0;
960 }
961 
962 static void max77693_muic_irq_work(struct work_struct *work)
963 {
964         struct max77693_muic_info *info = container_of(work,
965                         struct max77693_muic_info, irq_work);
966         int irq_type = -1;
967         int i, ret = 0;
968 
969         if (!info->edev)
970                 return;
971 
972         mutex_lock(&info->mutex);
973 
974         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
975                 if (info->irq == muic_irqs[i].virq)
976                         irq_type = muic_irqs[i].irq;
977 
978         ret = regmap_bulk_read(info->max77693->regmap_muic,
979                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
980         if (ret) {
981                 dev_err(info->dev, "failed to read MUIC register\n");
982                 mutex_unlock(&info->mutex);
983                 return;
984         }
985 
986         switch (irq_type) {
987         case MAX77693_MUIC_IRQ_INT1_ADC:
988         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
989         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
990         case MAX77693_MUIC_IRQ_INT1_ADC1K:
991                 /* Handle all of accessory except for
992                    type of charger accessory */
993                 ret = max77693_muic_adc_handler(info);
994                 break;
995         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
996         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
997         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
998         case MAX77693_MUIC_IRQ_INT2_DXOVP:
999         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
1000         case MAX77693_MUIC_IRQ_INT2_VIDRM:
1001                 /* Handle charger accessory */
1002                 ret = max77693_muic_chg_handler(info);
1003                 break;
1004         case MAX77693_MUIC_IRQ_INT3_EOC:
1005         case MAX77693_MUIC_IRQ_INT3_CGMBC:
1006         case MAX77693_MUIC_IRQ_INT3_OVP:
1007         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
1008         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
1009         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
1010                 break;
1011         default:
1012                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
1013                                 irq_type);
1014                 mutex_unlock(&info->mutex);
1015                 return;
1016         }
1017 
1018         if (ret < 0)
1019                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
1020 
1021         mutex_unlock(&info->mutex);
1022 
1023         return;
1024 }
1025 
1026 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1027 {
1028         struct max77693_muic_info *info = data;
1029 
1030         info->irq = irq;
1031         schedule_work(&info->irq_work);
1032 
1033         return IRQ_HANDLED;
1034 }
1035 
1036 static struct regmap_config max77693_muic_regmap_config = {
1037         .reg_bits = 8,
1038         .val_bits = 8,
1039 };
1040 
1041 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1042 {
1043         int ret = 0;
1044         int adc;
1045         int chg_type;
1046         bool attached;
1047 
1048         mutex_lock(&info->mutex);
1049 
1050         /* Read STATUSx register to detect accessory */
1051         ret = regmap_bulk_read(info->max77693->regmap_muic,
1052                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1053         if (ret) {
1054                 dev_err(info->dev, "failed to read MUIC register\n");
1055                 mutex_unlock(&info->mutex);
1056                 return ret;
1057         }
1058 
1059         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1060                                         &attached);
1061         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1062                 ret = max77693_muic_adc_handler(info);
1063                 if (ret < 0) {
1064                         dev_err(info->dev, "Cannot detect accessory\n");
1065                         mutex_unlock(&info->mutex);
1066                         return ret;
1067                 }
1068         }
1069 
1070         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1071                                         &attached);
1072         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1073                 ret = max77693_muic_chg_handler(info);
1074                 if (ret < 0) {
1075                         dev_err(info->dev, "Cannot detect charger accessory\n");
1076                         mutex_unlock(&info->mutex);
1077                         return ret;
1078                 }
1079         }
1080 
1081         mutex_unlock(&info->mutex);
1082 
1083         return 0;
1084 }
1085 
1086 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1087 {
1088         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1089                                 struct max77693_muic_info, wq_detcable);
1090 
1091         max77693_muic_detect_accessory(info);
1092 }
1093 
1094 static int max77693_muic_probe(struct platform_device *pdev)
1095 {
1096         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1097         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1098         struct max77693_muic_info *info;
1099         struct max77693_reg_data *init_data;
1100         int num_init_data;
1101         int delay_jiffies;
1102         int ret;
1103         int i;
1104         unsigned int id;
1105 
1106         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1107                                    GFP_KERNEL);
1108         if (!info)
1109                 return -ENOMEM;
1110 
1111         info->dev = &pdev->dev;
1112         info->max77693 = max77693;
1113         if (info->max77693->regmap_muic) {
1114                 dev_dbg(&pdev->dev, "allocate register map\n");
1115         } else {
1116                 info->max77693->regmap_muic = devm_regmap_init_i2c(
1117                                                 info->max77693->muic,
1118                                                 &max77693_muic_regmap_config);
1119                 if (IS_ERR(info->max77693->regmap_muic)) {
1120                         ret = PTR_ERR(info->max77693->regmap_muic);
1121                         dev_err(max77693->dev,
1122                                 "failed to allocate register map: %d\n", ret);
1123                         return ret;
1124                 }
1125         }
1126 
1127         /* Register input device for button of dock device */
1128         info->dock = devm_input_allocate_device(&pdev->dev);
1129         if (!info->dock) {
1130                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1131                 return -ENOMEM;
1132         }
1133         info->dock->name = "max77693-muic/dock";
1134         info->dock->phys = "max77693-muic/extcon";
1135         info->dock->dev.parent = &pdev->dev;
1136 
1137         __set_bit(EV_REP, info->dock->evbit);
1138 
1139         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1140         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1141         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1142         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1143         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1144 
1145         ret = input_register_device(info->dock);
1146         if (ret < 0) {
1147                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1148                                 ret);
1149                 return ret;
1150         }
1151 
1152         platform_set_drvdata(pdev, info);
1153         mutex_init(&info->mutex);
1154 
1155         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1156 
1157         /* Support irq domain for MAX77693 MUIC device */
1158         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1159                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1160                 unsigned int virq = 0;
1161 
1162                 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1163                                         muic_irq->irq);
1164                 if (!virq)
1165                         return -EINVAL;
1166                 muic_irq->virq = virq;
1167 
1168                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1169                                 max77693_muic_irq_handler,
1170                                 IRQF_NO_SUSPEND,
1171                                 muic_irq->name, info);
1172                 if (ret) {
1173                         dev_err(&pdev->dev,
1174                                 "failed: irq request (IRQ: %d,"
1175                                 " error :%d)\n",
1176                                 muic_irq->irq, ret);
1177                         return ret;
1178                 }
1179         }
1180 
1181         /* Initialize extcon device */
1182         info->edev = devm_extcon_dev_allocate(&pdev->dev,
1183                                               max77693_extcon_cable);
1184         if (IS_ERR(info->edev)) {
1185                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1186                 return -ENOMEM;
1187         }
1188         info->edev->name = DEV_NAME;
1189 
1190         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1191         if (ret) {
1192                 dev_err(&pdev->dev, "failed to register extcon device\n");
1193                 return ret;
1194         }
1195 
1196         /* Initialize MUIC register by using platform data or default data */
1197         if (pdata && pdata->muic_data) {
1198                 init_data = pdata->muic_data->init_data;
1199                 num_init_data = pdata->muic_data->num_init_data;
1200         } else {
1201                 init_data = default_init_data;
1202                 num_init_data = ARRAY_SIZE(default_init_data);
1203         }
1204 
1205         for (i = 0; i < num_init_data; i++) {
1206                 enum max77693_irq_source irq_src
1207                                 = MAX77693_IRQ_GROUP_NR;
1208 
1209                 regmap_write(info->max77693->regmap_muic,
1210                                 init_data[i].addr,
1211                                 init_data[i].data);
1212 
1213                 switch (init_data[i].addr) {
1214                 case MAX77693_MUIC_REG_INTMASK1:
1215                         irq_src = MUIC_INT1;
1216                         break;
1217                 case MAX77693_MUIC_REG_INTMASK2:
1218                         irq_src = MUIC_INT2;
1219                         break;
1220                 case MAX77693_MUIC_REG_INTMASK3:
1221                         irq_src = MUIC_INT3;
1222                         break;
1223                 }
1224 
1225                 if (irq_src < MAX77693_IRQ_GROUP_NR)
1226                         info->max77693->irq_masks_cur[irq_src]
1227                                 = init_data[i].data;
1228         }
1229 
1230         if (pdata && pdata->muic_data) {
1231                 struct max77693_muic_platform_data *muic_pdata
1232                                                    = pdata->muic_data;
1233 
1234                 /*
1235                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1236                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1237                  */
1238                 if (muic_pdata->path_uart)
1239                         info->path_uart = muic_pdata->path_uart;
1240                 else
1241                         info->path_uart = CONTROL1_SW_UART;
1242 
1243                 if (muic_pdata->path_usb)
1244                         info->path_usb = muic_pdata->path_usb;
1245                 else
1246                         info->path_usb = CONTROL1_SW_USB;
1247 
1248                 /*
1249                  * Default delay time for detecting cable state
1250                  * after certain time.
1251                  */
1252                 if (muic_pdata->detcable_delay_ms)
1253                         delay_jiffies =
1254                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1255                 else
1256                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1257         } else {
1258                 info->path_usb = CONTROL1_SW_USB;
1259                 info->path_uart = CONTROL1_SW_UART;
1260                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1261         }
1262 
1263         /* Set initial path for UART */
1264          max77693_muic_set_path(info, info->path_uart, true);
1265 
1266         /* Check revision number of MUIC device*/
1267         ret = regmap_read(info->max77693->regmap_muic,
1268                         MAX77693_MUIC_REG_ID, &id);
1269         if (ret < 0) {
1270                 dev_err(&pdev->dev, "failed to read revision number\n");
1271                 return ret;
1272         }
1273         dev_info(info->dev, "device ID : 0x%x\n", id);
1274 
1275         /* Set ADC debounce time */
1276         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1277 
1278         /*
1279          * Detect accessory after completing the initialization of platform
1280          *
1281          * - Use delayed workqueue to detect cable state and then
1282          * notify cable state to notifiee/platform through uevent.
1283          * After completing the booting of platform, the extcon provider
1284          * driver should notify cable state to upper layer.
1285          */
1286         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1287         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1288                         delay_jiffies);
1289 
1290         return ret;
1291 }
1292 
1293 static int max77693_muic_remove(struct platform_device *pdev)
1294 {
1295         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1296 
1297         cancel_work_sync(&info->irq_work);
1298         input_unregister_device(info->dock);
1299 
1300         return 0;
1301 }
1302 
1303 static struct platform_driver max77693_muic_driver = {
1304         .driver         = {
1305                 .name   = DEV_NAME,
1306         },
1307         .probe          = max77693_muic_probe,
1308         .remove         = max77693_muic_remove,
1309 };
1310 
1311 module_platform_driver(max77693_muic_driver);
1312 
1313 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1314 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1315 MODULE_LICENSE("GPL");
1316 MODULE_ALIAS("platform:extcon-max77693");
1317 

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