Version:  2.0.40 2.2.26 2.4.37 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7

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

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us