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-provider.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 /*
192 * The below accessories have same ADC value so ADCLow and
193 * ADC1K bit is used to separate specific accessory.
194 */
195 /* ADC|VBVolot|ADCLow|ADC1K| */
196 MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */
197 MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */
198 MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */
199 MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */
200 MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */
201 };
202
203 /*
204 * MAX77693 MUIC device support below list of accessories(external connector)
205 */
206 static const unsigned int max77693_extcon_cable[] = {
207 EXTCON_USB,
208 EXTCON_USB_HOST,
209 EXTCON_CHG_USB_SDP,
210 EXTCON_CHG_USB_DCP,
211 EXTCON_CHG_USB_FAST,
212 EXTCON_CHG_USB_SLOW,
213 EXTCON_CHG_USB_CDP,
214 EXTCON_DISP_MHL,
215 EXTCON_JIG,
216 EXTCON_DOCK,
217 EXTCON_NONE,
218 };
219
220 /*
221 * max77693_muic_set_debounce_time - Set the debounce time of ADC
222 * @info: the instance including private data of max77693 MUIC
223 * @time: the debounce time of ADC
224 */
max77693_muic_set_debounce_time(struct max77693_muic_info * info,enum max77693_muic_adc_debounce_time time)225 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
226 enum max77693_muic_adc_debounce_time time)
227 {
228 int ret;
229
230 switch (time) {
231 case ADC_DEBOUNCE_TIME_5MS:
232 case ADC_DEBOUNCE_TIME_10MS:
233 case ADC_DEBOUNCE_TIME_25MS:
234 case ADC_DEBOUNCE_TIME_38_62MS:
235 /*
236 * Don't touch BTLDset, JIGset when you want to change adc
237 * debounce time. If it writes other than 0 to BTLDset, JIGset
238 * muic device will be reset and loose current state.
239 */
240 ret = regmap_write(info->max77693->regmap_muic,
241 MAX77693_MUIC_REG_CTRL3,
242 time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
243 if (ret) {
244 dev_err(info->dev, "failed to set ADC debounce time\n");
245 return ret;
246 }
247 break;
248 default:
249 dev_err(info->dev, "invalid ADC debounce time\n");
250 return -EINVAL;
251 }
252
253 return 0;
254 };
255
256 /*
257 * max77693_muic_set_path - Set hardware line according to attached cable
258 * @info: the instance including private data of max77693 MUIC
259 * @value: the path according to attached cable
260 * @attached: the state of cable (true:attached, false:detached)
261 *
262 * The max77693 MUIC device share outside H/W line among a varity of cables
263 * so, this function set internal path of H/W line according to the type of
264 * attached cable.
265 */
max77693_muic_set_path(struct max77693_muic_info * info,u8 val,bool attached)266 static int max77693_muic_set_path(struct max77693_muic_info *info,
267 u8 val, bool attached)
268 {
269 int ret;
270 unsigned int ctrl1, ctrl2 = 0;
271
272 if (attached)
273 ctrl1 = val;
274 else
275 ctrl1 = MAX77693_CONTROL1_SW_OPEN;
276
277 ret = regmap_update_bits(info->max77693->regmap_muic,
278 MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
279 if (ret < 0) {
280 dev_err(info->dev, "failed to update MUIC register\n");
281 return ret;
282 }
283
284 if (attached)
285 ctrl2 |= MAX77693_CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
286 else
287 ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
288
289 ret = regmap_update_bits(info->max77693->regmap_muic,
290 MAX77693_MUIC_REG_CTRL2,
291 MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
292 ctrl2);
293 if (ret < 0) {
294 dev_err(info->dev, "failed to update MUIC register\n");
295 return ret;
296 }
297
298 dev_info(info->dev,
299 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
300 ctrl1, ctrl2, attached ? "attached" : "detached");
301
302 return 0;
303 }
304
305 /*
306 * max77693_muic_get_cable_type - Return cable type and check cable state
307 * @info: the instance including private data of max77693 MUIC
308 * @group: the path according to attached cable
309 * @attached: store cable state and return
310 *
311 * This function check the cable state either attached or detached,
312 * and then divide precise type of cable according to cable group.
313 * - MAX77693_CABLE_GROUP_ADC
314 * - MAX77693_CABLE_GROUP_ADC_GND
315 * - MAX77693_CABLE_GROUP_CHG
316 * - MAX77693_CABLE_GROUP_VBVOLT
317 */
max77693_muic_get_cable_type(struct max77693_muic_info * info,enum max77693_muic_cable_group group,bool * attached)318 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
319 enum max77693_muic_cable_group group, bool *attached)
320 {
321 int cable_type = 0;
322 int adc;
323 int adc1k;
324 int adclow;
325 int vbvolt;
326 int chg_type;
327
328 switch (group) {
329 case MAX77693_CABLE_GROUP_ADC:
330 /*
331 * Read ADC value to check cable type and decide cable state
332 * according to cable type
333 */
334 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
335 adc >>= MAX77693_STATUS1_ADC_SHIFT;
336
337 /*
338 * Check current cable state/cable type and store cable type
339 * (info->prev_cable_type) for handling cable when cable is
340 * detached.
341 */
342 if (adc == MAX77693_MUIC_ADC_OPEN) {
343 *attached = false;
344
345 cable_type = info->prev_cable_type;
346 info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
347 } else {
348 *attached = true;
349
350 cable_type = info->prev_cable_type = adc;
351 }
352 break;
353 case MAX77693_CABLE_GROUP_ADC_GND:
354 /*
355 * Read ADC value to check cable type and decide cable state
356 * according to cable type
357 */
358 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
359 adc >>= MAX77693_STATUS1_ADC_SHIFT;
360
361 /*
362 * Check current cable state/cable type and store cable type
363 * (info->prev_cable_type/_gnd) for handling cable when cable
364 * is detached.
365 */
366 if (adc == MAX77693_MUIC_ADC_OPEN) {
367 *attached = false;
368
369 cable_type = info->prev_cable_type_gnd;
370 info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
371 } else {
372 *attached = true;
373
374 adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
375 adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
376 adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
377 adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
378
379 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
380 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
381
382 /**
383 * [0x1|VBVolt|ADCLow|ADC1K]
384 * [0x1| 0| 0| 0] USB_HOST
385 * [0x1| 1| 0| 0] USB_HSOT_VB
386 * [0x1| 0| 1| 0] Audio Video cable with load
387 * [0x1| 0| 1| 1] MHL without charging cable
388 * [0x1| 1| 1| 1] MHL with charging cable
389 */
390 cable_type = ((0x1 << 8)
391 | (vbvolt << 2)
392 | (adclow << 1)
393 | adc1k);
394
395 info->prev_cable_type = adc;
396 info->prev_cable_type_gnd = cable_type;
397 }
398
399 break;
400 case MAX77693_CABLE_GROUP_CHG:
401 /*
402 * Read charger type to check cable type and decide cable state
403 * according to type of charger cable.
404 */
405 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
406 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
407
408 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
409 *attached = false;
410
411 cable_type = info->prev_chg_type;
412 info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
413 } else {
414 *attached = true;
415
416 /*
417 * Check current cable state/cable type and store cable
418 * type(info->prev_chg_type) for handling cable when
419 * charger cable is detached.
420 */
421 cable_type = info->prev_chg_type = chg_type;
422 }
423
424 break;
425 case MAX77693_CABLE_GROUP_VBVOLT:
426 /*
427 * Read ADC value to check cable type and decide cable state
428 * according to cable type
429 */
430 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
431 adc >>= MAX77693_STATUS1_ADC_SHIFT;
432 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
433 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
434
435 if (adc == MAX77693_MUIC_ADC_OPEN
436 && chg_type == MAX77693_CHARGER_TYPE_NONE)
437 *attached = false;
438 else
439 *attached = true;
440
441 /*
442 * Read vbvolt field, if vbvolt is 1,
443 * this cable is used for charging.
444 */
445 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
446 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
447
448 cable_type = vbvolt;
449 break;
450 default:
451 dev_err(info->dev, "Unknown cable group (%d)\n", group);
452 cable_type = -EINVAL;
453 break;
454 }
455
456 return cable_type;
457 }
458
max77693_muic_dock_handler(struct max77693_muic_info * info,int cable_type,bool attached)459 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
460 int cable_type, bool attached)
461 {
462 int ret = 0;
463 int vbvolt;
464 bool cable_attached;
465 unsigned int dock_id;
466
467 dev_info(info->dev,
468 "external connector is %s (adc:0x%02x)\n",
469 attached ? "attached" : "detached", cable_type);
470
471 switch (cable_type) {
472 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
473 /*
474 * Check power cable whether attached or detached state.
475 * The Dock-Smart device need surely external power supply.
476 * If power cable(USB/TA) isn't connected to Dock device,
477 * user can't use Dock-Smart for desktop mode.
478 */
479 vbvolt = max77693_muic_get_cable_type(info,
480 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
481 if (attached && !vbvolt) {
482 dev_warn(info->dev,
483 "Cannot detect external power supply\n");
484 return 0;
485 }
486
487 /*
488 * Notify Dock/MHL state.
489 * - Dock device include three type of cable which
490 * are HDMI, USB for mouse/keyboard and micro-usb port
491 * for USB/TA cable. Dock device need always exteranl
492 * power supply(USB/TA cable through micro-usb cable). Dock
493 * device support screen output of target to separate
494 * monitor and mouse/keyboard for desktop mode.
495 *
496 * Features of 'USB/TA cable with Dock device'
497 * - Support MHL
498 * - Support external output feature of audio
499 * - Support charging through micro-usb port without data
500 * connection if TA cable is connected to target.
501 * - Support charging and data connection through micro-usb port
502 * if USB cable is connected between target and host
503 * device.
504 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
505 */
506 ret = max77693_muic_set_path(info, info->path_usb, attached);
507 if (ret < 0)
508 return ret;
509
510 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
511 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
512 goto out;
513 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
514 dock_id = EXTCON_DOCK;
515 break;
516 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
517 dock_id = EXTCON_DOCK;
518 if (!attached) {
519 extcon_set_state_sync(info->edev, EXTCON_USB, false);
520 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
521 false);
522 }
523 break;
524 default:
525 dev_err(info->dev, "failed to detect %s dock device\n",
526 attached ? "attached" : "detached");
527 return -EINVAL;
528 }
529
530 /* Dock-Car/Desk/Audio, PATH:AUDIO */
531 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
532 attached);
533 if (ret < 0)
534 return ret;
535 extcon_set_state_sync(info->edev, dock_id, attached);
536
537 out:
538 return 0;
539 }
540
max77693_muic_dock_button_handler(struct max77693_muic_info * info,int button_type,bool attached)541 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
542 int button_type, bool attached)
543 {
544 struct input_dev *dock = info->dock;
545 unsigned int code;
546
547 switch (button_type) {
548 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
549 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
550 /* DOCK_KEY_PREV */
551 code = KEY_PREVIOUSSONG;
552 break;
553 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
554 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
555 /* DOCK_KEY_NEXT */
556 code = KEY_NEXTSONG;
557 break;
558 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
559 /* DOCK_VOL_DOWN */
560 code = KEY_VOLUMEDOWN;
561 break;
562 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
563 /* DOCK_VOL_UP */
564 code = KEY_VOLUMEUP;
565 break;
566 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
567 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
568 /* DOCK_KEY_PLAY_PAUSE */
569 code = KEY_PLAYPAUSE;
570 break;
571 default:
572 dev_err(info->dev,
573 "failed to detect %s key (adc:0x%x)\n",
574 attached ? "pressed" : "released", button_type);
575 return -EINVAL;
576 }
577
578 input_event(dock, EV_KEY, code, attached);
579 input_sync(dock);
580
581 return 0;
582 }
583
max77693_muic_adc_ground_handler(struct max77693_muic_info * info)584 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
585 {
586 int cable_type_gnd;
587 int ret = 0;
588 bool attached;
589
590 cable_type_gnd = max77693_muic_get_cable_type(info,
591 MAX77693_CABLE_GROUP_ADC_GND, &attached);
592
593 switch (cable_type_gnd) {
594 case MAX77693_MUIC_GND_USB_HOST:
595 case MAX77693_MUIC_GND_USB_HOST_VB:
596 /* USB_HOST, PATH: AP_USB */
597 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
598 attached);
599 if (ret < 0)
600 return ret;
601 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
602 break;
603 case MAX77693_MUIC_GND_AV_CABLE_LOAD:
604 /* Audio Video Cable with load, PATH:AUDIO */
605 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
606 attached);
607 if (ret < 0)
608 return ret;
609 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
610 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
611 attached);
612 break;
613 case MAX77693_MUIC_GND_MHL:
614 case MAX77693_MUIC_GND_MHL_VB:
615 /* MHL or MHL with USB/TA cable */
616 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
617 break;
618 default:
619 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
620 attached ? "attached" : "detached");
621 return -EINVAL;
622 }
623
624 return 0;
625 }
626
max77693_muic_jig_handler(struct max77693_muic_info * info,int cable_type,bool attached)627 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
628 int cable_type, bool attached)
629 {
630 int ret = 0;
631 u8 path = MAX77693_CONTROL1_SW_OPEN;
632
633 dev_info(info->dev,
634 "external connector is %s (adc:0x%02x)\n",
635 attached ? "attached" : "detached", cable_type);
636
637 switch (cable_type) {
638 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */
639 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
640 /* PATH:AP_USB */
641 path = MAX77693_CONTROL1_SW_USB;
642 break;
643 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
644 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* ADC_JIG_UART_ON */
645 /* PATH:AP_UART */
646 path = MAX77693_CONTROL1_SW_UART;
647 break;
648 default:
649 dev_err(info->dev, "failed to detect %s jig cable\n",
650 attached ? "attached" : "detached");
651 return -EINVAL;
652 }
653
654 ret = max77693_muic_set_path(info, path, attached);
655 if (ret < 0)
656 return ret;
657
658 extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
659
660 return 0;
661 }
662
max77693_muic_adc_handler(struct max77693_muic_info * info)663 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
664 {
665 int cable_type;
666 int button_type;
667 bool attached;
668 int ret = 0;
669
670 /* Check accessory state which is either detached or attached */
671 cable_type = max77693_muic_get_cable_type(info,
672 MAX77693_CABLE_GROUP_ADC, &attached);
673
674 dev_info(info->dev,
675 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
676 attached ? "attached" : "detached", cable_type,
677 info->prev_cable_type);
678
679 switch (cable_type) {
680 case MAX77693_MUIC_ADC_GROUND:
681 /* USB_HOST/MHL/Audio */
682 max77693_muic_adc_ground_handler(info);
683 break;
684 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
685 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
686 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
687 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
688 /* JIG */
689 ret = max77693_muic_jig_handler(info, cable_type, attached);
690 if (ret < 0)
691 return ret;
692 break;
693 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
694 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
695 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
696 /*
697 * DOCK device
698 *
699 * The MAX77693 MUIC device can detect total 34 cable type
700 * except of charger cable and MUIC device didn't define
701 * specfic role of cable in the range of from 0x01 to 0x12
702 * of ADC value. So, can use/define cable with no role according
703 * to schema of hardware board.
704 */
705 ret = max77693_muic_dock_handler(info, cable_type, attached);
706 if (ret < 0)
707 return ret;
708 break;
709 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */
710 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */
711 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */
712 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */
713 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */
714 /*
715 * Button of DOCK device
716 * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
717 *
718 * The MAX77693 MUIC device can detect total 34 cable type
719 * except of charger cable and MUIC device didn't define
720 * specfic role of cable in the range of from 0x01 to 0x12
721 * of ADC value. So, can use/define cable with no role according
722 * to schema of hardware board.
723 */
724 if (attached)
725 button_type = info->prev_button_type = cable_type;
726 else
727 button_type = info->prev_button_type;
728
729 ret = max77693_muic_dock_button_handler(info, button_type,
730 attached);
731 if (ret < 0)
732 return ret;
733 break;
734 case MAX77693_MUIC_ADC_SEND_END_BUTTON:
735 case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
736 case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
737 case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
738 case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
739 case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
740 case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
741 case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
742 case MAX77693_MUIC_ADC_RESERVED_ACC_1:
743 case MAX77693_MUIC_ADC_RESERVED_ACC_2:
744 case MAX77693_MUIC_ADC_RESERVED_ACC_4:
745 case MAX77693_MUIC_ADC_RESERVED_ACC_5:
746 case MAX77693_MUIC_ADC_CEA936_AUDIO:
747 case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
748 case MAX77693_MUIC_ADC_TTY_CONVERTER:
749 case MAX77693_MUIC_ADC_UART_CABLE:
750 case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
751 case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
752 /*
753 * This accessory isn't used in general case if it is specially
754 * needed to detect additional accessory, should implement
755 * proper operation when this accessory is attached/detached.
756 */
757 dev_info(info->dev,
758 "accessory is %s but it isn't used (adc:0x%x)\n",
759 attached ? "attached" : "detached", cable_type);
760 return -EAGAIN;
761 default:
762 dev_err(info->dev,
763 "failed to detect %s accessory (adc:0x%x)\n",
764 attached ? "attached" : "detached", cable_type);
765 return -EINVAL;
766 }
767
768 return 0;
769 }
770
max77693_muic_chg_handler(struct max77693_muic_info * info)771 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
772 {
773 int chg_type;
774 int cable_type_gnd;
775 int cable_type;
776 bool attached;
777 bool cable_attached;
778 int ret = 0;
779
780 chg_type = max77693_muic_get_cable_type(info,
781 MAX77693_CABLE_GROUP_CHG, &attached);
782
783 dev_info(info->dev,
784 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
785 attached ? "attached" : "detached",
786 chg_type, info->prev_chg_type);
787
788 switch (chg_type) {
789 case MAX77693_CHARGER_TYPE_USB:
790 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
791 case MAX77693_CHARGER_TYPE_NONE:
792 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
793 cable_type_gnd = max77693_muic_get_cable_type(info,
794 MAX77693_CABLE_GROUP_ADC_GND,
795 &cable_attached);
796 switch (cable_type_gnd) {
797 case MAX77693_MUIC_GND_MHL:
798 case MAX77693_MUIC_GND_MHL_VB:
799 /*
800 * MHL cable with USB/TA cable
801 * - MHL cable include two port(HDMI line and separate
802 * micro-usb port. When the target connect MHL cable,
803 * extcon driver check whether USB/TA cable is
804 * connected. If USB/TA cable is connected, extcon
805 * driver notify state to notifiee for charging battery.
806 *
807 * Features of 'USB/TA with MHL cable'
808 * - Support MHL
809 * - Support charging through micro-usb port without
810 * data connection
811 */
812 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
813 attached);
814 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
815 cable_attached);
816 break;
817 }
818
819 /* Check MAX77693_CABLE_GROUP_ADC type */
820 cable_type = max77693_muic_get_cable_type(info,
821 MAX77693_CABLE_GROUP_ADC,
822 &cable_attached);
823 switch (cable_type) {
824 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
825 /*
826 * Dock-Audio device with USB/TA cable
827 * - Dock device include two port(Dock-Audio and micro-
828 * usb port). When the target connect Dock-Audio device,
829 * extcon driver check whether USB/TA cable is connected
830 * or not. If USB/TA cable is connected, extcon driver
831 * notify state to notifiee for charging battery.
832 *
833 * Features of 'USB/TA cable with Dock-Audio device'
834 * - Support external output feature of audio.
835 * - Support charging through micro-usb port without
836 * data connection.
837 */
838 extcon_set_state_sync(info->edev, EXTCON_USB,
839 attached);
840 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
841 attached);
842
843 if (!cable_attached)
844 extcon_set_state_sync(info->edev, EXTCON_DOCK,
845 cable_attached);
846 break;
847 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
848 /*
849 * Dock-Smart device with USB/TA cable
850 * - Dock-Desk device include three type of cable which
851 * are HDMI, USB for mouse/keyboard and micro-usb port
852 * for USB/TA cable. Dock-Smart device need always
853 * exteranl power supply(USB/TA cable through micro-usb
854 * cable). Dock-Smart device support screen output of
855 * target to separate monitor and mouse/keyboard for
856 * desktop mode.
857 *
858 * Features of 'USB/TA cable with Dock-Smart device'
859 * - Support MHL
860 * - Support external output feature of audio
861 * - Support charging through micro-usb port without
862 * data connection if TA cable is connected to target.
863 * - Support charging and data connection through micro-
864 * usb port if USB cable is connected between target
865 * and host device
866 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
867 */
868 ret = max77693_muic_set_path(info, info->path_usb,
869 attached);
870 if (ret < 0)
871 return ret;
872
873 extcon_set_state_sync(info->edev, EXTCON_DOCK,
874 attached);
875 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
876 attached);
877 break;
878 }
879
880 /* Check MAX77693_CABLE_GROUP_CHG type */
881 switch (chg_type) {
882 case MAX77693_CHARGER_TYPE_NONE:
883 /*
884 * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
885 * cable is attached, muic device happen below two irq.
886 * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
887 * MHL/Dock-Audio.
888 * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
889 * USB/TA cable connected to MHL or Dock-Audio.
890 * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
891 * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
892 *
893 * If user attach MHL (with USB/TA cable and immediately
894 * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
895 * _INT2_CHGTYP irq is happened, USB/TA cable remain
896 * connected state to target. But USB/TA cable isn't
897 * connected to target. The user be face with unusual
898 * action. So, driver should check this situation in
899 * spite of, that previous charger type is N/A.
900 */
901 break;
902 case MAX77693_CHARGER_TYPE_USB:
903 /* Only USB cable, PATH:AP_USB */
904 ret = max77693_muic_set_path(info, info->path_usb,
905 attached);
906 if (ret < 0)
907 return ret;
908
909 extcon_set_state_sync(info->edev, EXTCON_USB,
910 attached);
911 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
912 attached);
913 break;
914 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
915 /* Only TA cable */
916 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
917 attached);
918 break;
919 }
920 break;
921 case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
922 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
923 attached);
924 break;
925 case MAX77693_CHARGER_TYPE_APPLE_500MA:
926 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
927 attached);
928 break;
929 case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
930 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
931 attached);
932 break;
933 case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
934 break;
935 default:
936 dev_err(info->dev,
937 "failed to detect %s accessory (chg_type:0x%x)\n",
938 attached ? "attached" : "detached", chg_type);
939 return -EINVAL;
940 }
941
942 return 0;
943 }
944
max77693_muic_irq_work(struct work_struct * work)945 static void max77693_muic_irq_work(struct work_struct *work)
946 {
947 struct max77693_muic_info *info = container_of(work,
948 struct max77693_muic_info, irq_work);
949 int irq_type = -1;
950 int i, ret = 0;
951
952 if (!info->edev)
953 return;
954
955 mutex_lock(&info->mutex);
956
957 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
958 if (info->irq == muic_irqs[i].virq)
959 irq_type = muic_irqs[i].irq;
960
961 ret = regmap_bulk_read(info->max77693->regmap_muic,
962 MAX77693_MUIC_REG_STATUS1, info->status, 2);
963 if (ret) {
964 dev_err(info->dev, "failed to read MUIC register\n");
965 mutex_unlock(&info->mutex);
966 return;
967 }
968
969 switch (irq_type) {
970 case MAX77693_MUIC_IRQ_INT1_ADC:
971 case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
972 case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
973 case MAX77693_MUIC_IRQ_INT1_ADC1K:
974 /*
975 * Handle all of accessory except for
976 * type of charger accessory.
977 */
978 ret = max77693_muic_adc_handler(info);
979 break;
980 case MAX77693_MUIC_IRQ_INT2_CHGTYP:
981 case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
982 case MAX77693_MUIC_IRQ_INT2_DCDTMR:
983 case MAX77693_MUIC_IRQ_INT2_DXOVP:
984 case MAX77693_MUIC_IRQ_INT2_VBVOLT:
985 case MAX77693_MUIC_IRQ_INT2_VIDRM:
986 /* Handle charger accessory */
987 ret = max77693_muic_chg_handler(info);
988 break;
989 case MAX77693_MUIC_IRQ_INT3_EOC:
990 case MAX77693_MUIC_IRQ_INT3_CGMBC:
991 case MAX77693_MUIC_IRQ_INT3_OVP:
992 case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
993 case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
994 case MAX77693_MUIC_IRQ_INT3_BAT_DET:
995 break;
996 default:
997 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
998 irq_type);
999 mutex_unlock(&info->mutex);
1000 return;
1001 }
1002
1003 if (ret < 0)
1004 dev_err(info->dev, "failed to handle MUIC interrupt\n");
1005
1006 mutex_unlock(&info->mutex);
1007 }
1008
max77693_muic_irq_handler(int irq,void * data)1009 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1010 {
1011 struct max77693_muic_info *info = data;
1012
1013 info->irq = irq;
1014 schedule_work(&info->irq_work);
1015
1016 return IRQ_HANDLED;
1017 }
1018
1019 static const struct regmap_config max77693_muic_regmap_config = {
1020 .reg_bits = 8,
1021 .val_bits = 8,
1022 };
1023
max77693_muic_detect_accessory(struct max77693_muic_info * info)1024 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1025 {
1026 int ret = 0;
1027 int adc;
1028 int chg_type;
1029 bool attached;
1030
1031 mutex_lock(&info->mutex);
1032
1033 /* Read STATUSx register to detect accessory */
1034 ret = regmap_bulk_read(info->max77693->regmap_muic,
1035 MAX77693_MUIC_REG_STATUS1, info->status, 2);
1036 if (ret) {
1037 dev_err(info->dev, "failed to read MUIC register\n");
1038 mutex_unlock(&info->mutex);
1039 return ret;
1040 }
1041
1042 adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1043 &attached);
1044 if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1045 ret = max77693_muic_adc_handler(info);
1046 if (ret < 0) {
1047 dev_err(info->dev, "Cannot detect accessory\n");
1048 mutex_unlock(&info->mutex);
1049 return ret;
1050 }
1051 }
1052
1053 chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1054 &attached);
1055 if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1056 ret = max77693_muic_chg_handler(info);
1057 if (ret < 0) {
1058 dev_err(info->dev, "Cannot detect charger accessory\n");
1059 mutex_unlock(&info->mutex);
1060 return ret;
1061 }
1062 }
1063
1064 mutex_unlock(&info->mutex);
1065
1066 return 0;
1067 }
1068
max77693_muic_detect_cable_wq(struct work_struct * work)1069 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1070 {
1071 struct max77693_muic_info *info = container_of(to_delayed_work(work),
1072 struct max77693_muic_info, wq_detcable);
1073
1074 max77693_muic_detect_accessory(info);
1075 }
1076
max77693_muic_probe(struct platform_device * pdev)1077 static int max77693_muic_probe(struct platform_device *pdev)
1078 {
1079 struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1080 struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1081 struct max77693_muic_info *info;
1082 struct max77693_reg_data *init_data;
1083 int num_init_data;
1084 int delay_jiffies;
1085 int ret;
1086 int i;
1087 unsigned int id;
1088
1089 info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1090 GFP_KERNEL);
1091 if (!info)
1092 return -ENOMEM;
1093
1094 info->dev = &pdev->dev;
1095 info->max77693 = max77693;
1096 if (info->max77693->regmap_muic) {
1097 dev_dbg(&pdev->dev, "allocate register map\n");
1098 } else {
1099 info->max77693->regmap_muic = devm_regmap_init_i2c(
1100 info->max77693->i2c_muic,
1101 &max77693_muic_regmap_config);
1102 if (IS_ERR(info->max77693->regmap_muic)) {
1103 ret = PTR_ERR(info->max77693->regmap_muic);
1104 dev_err(max77693->dev,
1105 "failed to allocate register map: %d\n", ret);
1106 return ret;
1107 }
1108 }
1109
1110 /* Register input device for button of dock device */
1111 info->dock = devm_input_allocate_device(&pdev->dev);
1112 if (!info->dock) {
1113 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1114 return -ENOMEM;
1115 }
1116 info->dock->name = "max77693-muic/dock";
1117 info->dock->phys = "max77693-muic/extcon";
1118 info->dock->dev.parent = &pdev->dev;
1119
1120 __set_bit(EV_REP, info->dock->evbit);
1121
1122 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1123 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1124 input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1125 input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1126 input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1127
1128 ret = input_register_device(info->dock);
1129 if (ret < 0) {
1130 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1131 ret);
1132 return ret;
1133 }
1134
1135 platform_set_drvdata(pdev, info);
1136 mutex_init(&info->mutex);
1137
1138 INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1139
1140 /* Support irq domain for MAX77693 MUIC device */
1141 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1142 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1143 int virq;
1144
1145 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1146 muic_irq->irq);
1147 if (virq <= 0)
1148 return -EINVAL;
1149 muic_irq->virq = virq;
1150
1151 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1152 max77693_muic_irq_handler,
1153 IRQF_NO_SUSPEND,
1154 muic_irq->name, info);
1155 if (ret) {
1156 dev_err(&pdev->dev,
1157 "failed: irq request (IRQ: %d, error :%d)\n",
1158 muic_irq->irq, ret);
1159 return ret;
1160 }
1161 }
1162
1163 /* Initialize extcon device */
1164 info->edev = devm_extcon_dev_allocate(&pdev->dev,
1165 max77693_extcon_cable);
1166 if (IS_ERR(info->edev)) {
1167 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1168 return -ENOMEM;
1169 }
1170
1171 ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1172 if (ret) {
1173 dev_err(&pdev->dev, "failed to register extcon device\n");
1174 return ret;
1175 }
1176
1177 /* Initialize MUIC register by using platform data or default data */
1178 if (pdata && pdata->muic_data) {
1179 init_data = pdata->muic_data->init_data;
1180 num_init_data = pdata->muic_data->num_init_data;
1181 } else {
1182 init_data = default_init_data;
1183 num_init_data = ARRAY_SIZE(default_init_data);
1184 }
1185
1186 for (i = 0; i < num_init_data; i++) {
1187 regmap_write(info->max77693->regmap_muic,
1188 init_data[i].addr,
1189 init_data[i].data);
1190 }
1191
1192 if (pdata && pdata->muic_data) {
1193 struct max77693_muic_platform_data *muic_pdata
1194 = pdata->muic_data;
1195
1196 /*
1197 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1198 * h/w path of COMP2/COMN1 on CONTROL1 register.
1199 */
1200 if (muic_pdata->path_uart)
1201 info->path_uart = muic_pdata->path_uart;
1202 else
1203 info->path_uart = MAX77693_CONTROL1_SW_UART;
1204
1205 if (muic_pdata->path_usb)
1206 info->path_usb = muic_pdata->path_usb;
1207 else
1208 info->path_usb = MAX77693_CONTROL1_SW_USB;
1209
1210 /*
1211 * Default delay time for detecting cable state
1212 * after certain time.
1213 */
1214 if (muic_pdata->detcable_delay_ms)
1215 delay_jiffies =
1216 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1217 else
1218 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1219 } else {
1220 info->path_usb = MAX77693_CONTROL1_SW_USB;
1221 info->path_uart = MAX77693_CONTROL1_SW_UART;
1222 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1223 }
1224
1225 /* Set initial path for UART */
1226 max77693_muic_set_path(info, info->path_uart, true);
1227
1228 /* Check revision number of MUIC device*/
1229 ret = regmap_read(info->max77693->regmap_muic,
1230 MAX77693_MUIC_REG_ID, &id);
1231 if (ret < 0) {
1232 dev_err(&pdev->dev, "failed to read revision number\n");
1233 return ret;
1234 }
1235 dev_info(info->dev, "device ID : 0x%x\n", id);
1236
1237 /* Set ADC debounce time */
1238 max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1239
1240 /*
1241 * Detect accessory after completing the initialization of platform
1242 *
1243 * - Use delayed workqueue to detect cable state and then
1244 * notify cable state to notifiee/platform through uevent.
1245 * After completing the booting of platform, the extcon provider
1246 * driver should notify cable state to upper layer.
1247 */
1248 INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1249 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1250 delay_jiffies);
1251
1252 return ret;
1253 }
1254
max77693_muic_remove(struct platform_device * pdev)1255 static int max77693_muic_remove(struct platform_device *pdev)
1256 {
1257 struct max77693_muic_info *info = platform_get_drvdata(pdev);
1258
1259 cancel_work_sync(&info->irq_work);
1260 input_unregister_device(info->dock);
1261
1262 return 0;
1263 }
1264
1265 static struct platform_driver max77693_muic_driver = {
1266 .driver = {
1267 .name = DEV_NAME,
1268 },
1269 .probe = max77693_muic_probe,
1270 .remove = max77693_muic_remove,
1271 };
1272
1273 module_platform_driver(max77693_muic_driver);
1274
1275 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1276 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1277 MODULE_LICENSE("GPL");
1278 MODULE_ALIAS("platform:extcon-max77693");
1279
