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Linux 4.1.16
[linux/fpc-iii.git] / drivers / extcon / extcon-max77693.c
bloba66bec8f6252dc140fbe6919b3cb846740f70a64
1 /*
2 * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
3 *
4 * Copyright (C) 2012 Samsung Electrnoics
5 * Chanwoo Choi <cw00.choi@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/i2c.h>
21 #include <linux/slab.h>
22 #include <linux/input.h>
23 #include <linux/interrupt.h>
24 #include <linux/err.h>
25 #include <linux/platform_device.h>
26 #include <linux/mfd/max77693.h>
27 #include <linux/mfd/max77693-private.h>
28 #include <linux/extcon.h>
29 #include <linux/regmap.h>
30 #include <linux/irqdomain.h>
31
32 #define DEV_NAME "max77693-muic"
33 #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
34
35 /*
36 * Default value of MAX77693 register to bring up MUIC device.
37 * If user don't set some initial value for MUIC device through platform data,
38 * extcon-max77693 driver use 'default_init_data' to bring up base operation
39 * of MAX77693 MUIC device.
40 */
41 static struct max77693_reg_data default_init_data[] = {
42 {
43 /* STATUS2 - [3]ChgDetRun */
44 .addr = MAX77693_MUIC_REG_STATUS2,
45 .data = STATUS2_CHGDETRUN_MASK,
46 }, {
47 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
48 .addr = MAX77693_MUIC_REG_INTMASK1,
49 .data = INTMASK1_ADC1K_MASK
50 | INTMASK1_ADC_MASK,
51 }, {
52 /* INTMASK2 - Unmask [0]ChgTypM */
53 .addr = MAX77693_MUIC_REG_INTMASK2,
54 .data = INTMASK2_CHGTYP_MASK,
55 }, {
56 /* INTMASK3 - Mask all of interrupts */
57 .addr = MAX77693_MUIC_REG_INTMASK3,
58 .data = 0x0,
59 }, {
60 /* CDETCTRL2 */
61 .addr = MAX77693_MUIC_REG_CDETCTRL2,
62 .data = CDETCTRL2_VIDRMEN_MASK
63 | CDETCTRL2_DXOVPEN_MASK,
64 },
65 };
66
67 enum max77693_muic_adc_debounce_time {
68 ADC_DEBOUNCE_TIME_5MS = 0,
69 ADC_DEBOUNCE_TIME_10MS,
70 ADC_DEBOUNCE_TIME_25MS,
71 ADC_DEBOUNCE_TIME_38_62MS,
72 };
73
74 struct max77693_muic_info {
75 struct device *dev;
76 struct max77693_dev *max77693;
77 struct extcon_dev *edev;
78 int prev_cable_type;
79 int prev_cable_type_gnd;
80 int prev_chg_type;
81 int prev_button_type;
82 u8 status[2];
83
84 int irq;
85 struct work_struct irq_work;
86 struct mutex mutex;
87
88 /*
89 * Use delayed workqueue to detect cable state and then
90 * notify cable state to notifiee/platform through uevent.
91 * After completing the booting of platform, the extcon provider
92 * driver should notify cable state to upper layer.
93 */
94 struct delayed_work wq_detcable;
95
96 /* Button of dock device */
97 struct input_dev *dock;
98
99 /*
100 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
101 * h/w path of COMP2/COMN1 on CONTROL1 register.
102 */
103 int path_usb;
104 int path_uart;
105 };
106
107 enum max77693_muic_cable_group {
108 MAX77693_CABLE_GROUP_ADC = 0,
109 MAX77693_CABLE_GROUP_ADC_GND,
110 MAX77693_CABLE_GROUP_CHG,
111 MAX77693_CABLE_GROUP_VBVOLT,
112 };
113
114 enum max77693_muic_charger_type {
115 MAX77693_CHARGER_TYPE_NONE = 0,
116 MAX77693_CHARGER_TYPE_USB,
117 MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
118 MAX77693_CHARGER_TYPE_DEDICATED_CHG,
119 MAX77693_CHARGER_TYPE_APPLE_500MA,
120 MAX77693_CHARGER_TYPE_APPLE_1A_2A,
121 MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
122 };
123
124 /**
125 * struct max77693_muic_irq
126 * @irq: the index of irq list of MUIC device.
127 * @name: the name of irq.
128 * @virq: the virtual irq to use irq domain
129 */
130 struct max77693_muic_irq {
131 unsigned int irq;
132 const char *name;
133 unsigned int virq;
134 };
135
136 static struct max77693_muic_irq muic_irqs[] = {
137 { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" },
138 { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" },
139 { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" },
140 { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" },
141 { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
142 { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" },
143 { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
144 { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" },
145 { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
146 { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" },
147 { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" },
148 { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" },
149 { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" },
150 { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" },
151 { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" },
152 { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" },
153 };
154
155 /* Define supported accessory type */
156 enum max77693_muic_acc_type {
157 MAX77693_MUIC_ADC_GROUND = 0x0,
158 MAX77693_MUIC_ADC_SEND_END_BUTTON,
159 MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
160 MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
161 MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
162 MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
163 MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
164 MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
165 MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
166 MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
167 MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
168 MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
169 MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
170 MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
171 MAX77693_MUIC_ADC_RESERVED_ACC_1,
172 MAX77693_MUIC_ADC_RESERVED_ACC_2,
173 MAX77693_MUIC_ADC_RESERVED_ACC_3,
174 MAX77693_MUIC_ADC_RESERVED_ACC_4,
175 MAX77693_MUIC_ADC_RESERVED_ACC_5,
176 MAX77693_MUIC_ADC_CEA936_AUDIO,
177 MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
178 MAX77693_MUIC_ADC_TTY_CONVERTER,
179 MAX77693_MUIC_ADC_UART_CABLE,
180 MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
181 MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
182 MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
183 MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
184 MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
185 MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
186 MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
187 MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
188 MAX77693_MUIC_ADC_OPEN,
189
190 /* The below accessories have same ADC value so ADCLow and
191 ADC1K bit is used to separate specific accessory */
192 /* ADC|VBVolot|ADCLow|ADC1K| */
193 MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */
194 MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */
195 MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */
196 MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */
197 MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */
198 };
199
200 /*
201 * MAX77693 MUIC device support below list of accessories(external connector)
202 */
203 enum {
204 EXTCON_CABLE_USB = 0,
205 EXTCON_CABLE_USB_HOST,
206 EXTCON_CABLE_TA,
207 EXTCON_CABLE_FAST_CHARGER,
208 EXTCON_CABLE_SLOW_CHARGER,
209 EXTCON_CABLE_CHARGE_DOWNSTREAM,
210 EXTCON_CABLE_MHL,
211 EXTCON_CABLE_MHL_TA,
212 EXTCON_CABLE_JIG_USB_ON,
213 EXTCON_CABLE_JIG_USB_OFF,
214 EXTCON_CABLE_JIG_UART_OFF,
215 EXTCON_CABLE_JIG_UART_ON,
216 EXTCON_CABLE_DOCK_SMART,
217 EXTCON_CABLE_DOCK_DESK,
218 EXTCON_CABLE_DOCK_AUDIO,
219
220 _EXTCON_CABLE_NUM,
221 };
222
223 static const char *max77693_extcon_cable[] = {
224 [EXTCON_CABLE_USB] = "USB",
225 [EXTCON_CABLE_USB_HOST] = "USB-Host",
226 [EXTCON_CABLE_TA] = "TA",
227 [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger",
228 [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger",
229 [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream",
230 [EXTCON_CABLE_MHL] = "MHL",
231 [EXTCON_CABLE_MHL_TA] = "MHL-TA",
232 [EXTCON_CABLE_JIG_USB_ON] = "JIG-USB-ON",
233 [EXTCON_CABLE_JIG_USB_OFF] = "JIG-USB-OFF",
234 [EXTCON_CABLE_JIG_UART_OFF] = "JIG-UART-OFF",
235 [EXTCON_CABLE_JIG_UART_ON] = "JIG-UART-ON",
236 [EXTCON_CABLE_DOCK_SMART] = "Dock-Smart",
237 [EXTCON_CABLE_DOCK_DESK] = "Dock-Desk",
238 [EXTCON_CABLE_DOCK_AUDIO] = "Dock-Audio",
239
240 NULL,
241 };
242
243 /*
244 * max77693_muic_set_debounce_time - Set the debounce time of ADC
245 * @info: the instance including private data of max77693 MUIC
246 * @time: the debounce time of ADC
247 */
248 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
249 enum max77693_muic_adc_debounce_time time)
250 {
251 int ret;
252
253 switch (time) {
254 case ADC_DEBOUNCE_TIME_5MS:
255 case ADC_DEBOUNCE_TIME_10MS:
256 case ADC_DEBOUNCE_TIME_25MS:
257 case ADC_DEBOUNCE_TIME_38_62MS:
258 /*
259 * Don't touch BTLDset, JIGset when you want to change adc
260 * debounce time. If it writes other than 0 to BTLDset, JIGset
261 * muic device will be reset and loose current state.
262 */
263 ret = regmap_write(info->max77693->regmap_muic,
264 MAX77693_MUIC_REG_CTRL3,
265 time << CONTROL3_ADCDBSET_SHIFT);
266 if (ret) {
267 dev_err(info->dev, "failed to set ADC debounce time\n");
268 return ret;
269 }
270 break;
271 default:
272 dev_err(info->dev, "invalid ADC debounce time\n");
273 return -EINVAL;
274 }
275
276 return 0;
277 };
278
279 /*
280 * max77693_muic_set_path - Set hardware line according to attached cable
281 * @info: the instance including private data of max77693 MUIC
282 * @value: the path according to attached cable
283 * @attached: the state of cable (true:attached, false:detached)
284 *
285 * The max77693 MUIC device share outside H/W line among a varity of cables
286 * so, this function set internal path of H/W line according to the type of
287 * attached cable.
288 */
289 static int max77693_muic_set_path(struct max77693_muic_info *info,
290 u8 val, bool attached)
291 {
292 int ret = 0;
293 unsigned int ctrl1, ctrl2 = 0;
294
295 if (attached)
296 ctrl1 = val;
297 else
298 ctrl1 = CONTROL1_SW_OPEN;
299
300 ret = regmap_update_bits(info->max77693->regmap_muic,
301 MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
302 if (ret < 0) {
303 dev_err(info->dev, "failed to update MUIC register\n");
304 return ret;
305 }
306
307 if (attached)
308 ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
309 else
310 ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
311
312 ret = regmap_update_bits(info->max77693->regmap_muic,
313 MAX77693_MUIC_REG_CTRL2,
314 CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK, ctrl2);
315 if (ret < 0) {
316 dev_err(info->dev, "failed to update MUIC register\n");
317 return ret;
318 }
319
320 dev_info(info->dev,
321 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
322 ctrl1, ctrl2, attached ? "attached" : "detached");
323
324 return 0;
325 }
326
327 /*
328 * max77693_muic_get_cable_type - Return cable type and check cable state
329 * @info: the instance including private data of max77693 MUIC
330 * @group: the path according to attached cable
331 * @attached: store cable state and return
332 *
333 * This function check the cable state either attached or detached,
334 * and then divide precise type of cable according to cable group.
335 * - MAX77693_CABLE_GROUP_ADC
336 * - MAX77693_CABLE_GROUP_ADC_GND
337 * - MAX77693_CABLE_GROUP_CHG
338 * - MAX77693_CABLE_GROUP_VBVOLT
339 */
340 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
341 enum max77693_muic_cable_group group, bool *attached)
342 {
343 int cable_type = 0;
344 int adc;
345 int adc1k;
346 int adclow;
347 int vbvolt;
348 int chg_type;
349
350 switch (group) {
351 case MAX77693_CABLE_GROUP_ADC:
352 /*
353 * Read ADC value to check cable type and decide cable state
354 * according to cable type
355 */
356 adc = info->status[0] & STATUS1_ADC_MASK;
357 adc >>= STATUS1_ADC_SHIFT;
358
359 /*
360 * Check current cable state/cable type and store cable type
361 * (info->prev_cable_type) for handling cable when cable is
362 * detached.
363 */
364 if (adc == MAX77693_MUIC_ADC_OPEN) {
365 *attached = false;
366
367 cable_type = info->prev_cable_type;
368 info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
369 } else {
370 *attached = true;
371
372 cable_type = info->prev_cable_type = adc;
373 }
374 break;
375 case MAX77693_CABLE_GROUP_ADC_GND:
376 /*
377 * Read ADC value to check cable type and decide cable state
378 * according to cable type
379 */
380 adc = info->status[0] & STATUS1_ADC_MASK;
381 adc >>= STATUS1_ADC_SHIFT;
382
383 /*
384 * Check current cable state/cable type and store cable type
385 * (info->prev_cable_type/_gnd) for handling cable when cable
386 * is detached.
387 */
388 if (adc == MAX77693_MUIC_ADC_OPEN) {
389 *attached = false;
390
391 cable_type = info->prev_cable_type_gnd;
392 info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
393 } else {
394 *attached = true;
395
396 adclow = info->status[0] & STATUS1_ADCLOW_MASK;
397 adclow >>= STATUS1_ADCLOW_SHIFT;
398 adc1k = info->status[0] & STATUS1_ADC1K_MASK;
399 adc1k >>= STATUS1_ADC1K_SHIFT;
400
401 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
402 vbvolt >>= STATUS2_VBVOLT_SHIFT;
403
404 /**
405 * [0x1|VBVolt|ADCLow|ADC1K]
406 * [0x1| 0| 0| 0] USB_HOST
407 * [0x1| 1| 0| 0] USB_HSOT_VB
408 * [0x1| 0| 1| 0] Audio Video cable with load
409 * [0x1| 0| 1| 1] MHL without charging cable
410 * [0x1| 1| 1| 1] MHL with charging cable
411 */
412 cable_type = ((0x1 << 8)
413 | (vbvolt << 2)
414 | (adclow << 1)
415 | adc1k);
416
417 info->prev_cable_type = adc;
418 info->prev_cable_type_gnd = cable_type;
419 }
420
421 break;
422 case MAX77693_CABLE_GROUP_CHG:
423 /*
424 * Read charger type to check cable type and decide cable state
425 * according to type of charger cable.
426 */
427 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
428 chg_type >>= STATUS2_CHGTYP_SHIFT;
429
430 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
431 *attached = false;
432
433 cable_type = info->prev_chg_type;
434 info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
435 } else {
436 *attached = true;
437
438 /*
439 * Check current cable state/cable type and store cable
440 * type(info->prev_chg_type) for handling cable when
441 * charger cable is detached.
442 */
443 cable_type = info->prev_chg_type = chg_type;
444 }
445
446 break;
447 case MAX77693_CABLE_GROUP_VBVOLT:
448 /*
449 * Read ADC value to check cable type and decide cable state
450 * according to cable type
451 */
452 adc = info->status[0] & STATUS1_ADC_MASK;
453 adc >>= STATUS1_ADC_SHIFT;
454 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
455 chg_type >>= STATUS2_CHGTYP_SHIFT;
456
457 if (adc == MAX77693_MUIC_ADC_OPEN
458 && chg_type == MAX77693_CHARGER_TYPE_NONE)
459 *attached = false;
460 else
461 *attached = true;
462
463 /*
464 * Read vbvolt field, if vbvolt is 1,
465 * this cable is used for charging.
466 */
467 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
468 vbvolt >>= STATUS2_VBVOLT_SHIFT;
469
470 cable_type = vbvolt;
471 break;
472 default:
473 dev_err(info->dev, "Unknown cable group (%d)\n", group);
474 cable_type = -EINVAL;
475 break;
476 }
477
478 return cable_type;
479 }
480
481 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
482 int cable_type, bool attached)
483 {
484 int ret = 0;
485 int vbvolt;
486 bool cable_attached;
487 char dock_name[CABLE_NAME_MAX];
488
489 dev_info(info->dev,
490 "external connector is %s (adc:0x%02x)\n",
491 attached ? "attached" : "detached", cable_type);
492
493 switch (cable_type) {
494 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
495 /*
496 * Check power cable whether attached or detached state.
497 * The Dock-Smart device need surely external power supply.
498 * If power cable(USB/TA) isn't connected to Dock device,
499 * user can't use Dock-Smart for desktop mode.
500 */
501 vbvolt = max77693_muic_get_cable_type(info,
502 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
503 if (attached && !vbvolt) {
504 dev_warn(info->dev,
505 "Cannot detect external power supply\n");
506 return 0;
507 }
508
509 /*
510 * Notify Dock-Smart/MHL state.
511 * - Dock-Smart device include three type of cable which
512 * are HDMI, USB for mouse/keyboard and micro-usb port
513 * for USB/TA cable. Dock-Smart device need always exteranl
514 * power supply(USB/TA cable through micro-usb cable). Dock-
515 * Smart device support screen output of target to separate
516 * monitor and mouse/keyboard for desktop mode.
517 *
518 * Features of 'USB/TA cable with Dock-Smart device'
519 * - Support MHL
520 * - Support external output feature of audio
521 * - Support charging through micro-usb port without data
522 * connection if TA cable is connected to target.
523 * - Support charging and data connection through micro-usb port
524 * if USB cable is connected between target and host
525 * device.
526 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
527 */
528 ret = max77693_muic_set_path(info, info->path_usb, attached);
529 if (ret < 0)
530 return ret;
531
532 extcon_set_cable_state(info->edev, "Dock-Smart", attached);
533 extcon_set_cable_state(info->edev, "MHL", attached);
534 goto out;
535 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
536 strcpy(dock_name, "Dock-Desk");
537 break;
538 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
539 strcpy(dock_name, "Dock-Audio");
540 if (!attached)
541 extcon_set_cable_state(info->edev, "USB", false);
542 break;
543 default:
544 dev_err(info->dev, "failed to detect %s dock device\n",
545 attached ? "attached" : "detached");
546 return -EINVAL;
547 }
548
549 /* Dock-Car/Desk/Audio, PATH:AUDIO */
550 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
551 if (ret < 0)
552 return ret;
553 extcon_set_cable_state(info->edev, dock_name, attached);
554
555 out:
556 return 0;
557 }
558
559 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
560 int button_type, bool attached)
561 {
562 struct input_dev *dock = info->dock;
563 unsigned int code;
564
565 switch (button_type) {
566 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
567 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
568 /* DOCK_KEY_PREV */
569 code = KEY_PREVIOUSSONG;
570 break;
571 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
572 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
573 /* DOCK_KEY_NEXT */
574 code = KEY_NEXTSONG;
575 break;
576 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
577 /* DOCK_VOL_DOWN */
578 code = KEY_VOLUMEDOWN;
579 break;
580 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
581 /* DOCK_VOL_UP */
582 code = KEY_VOLUMEUP;
583 break;
584 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
585 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
586 /* DOCK_KEY_PLAY_PAUSE */
587 code = KEY_PLAYPAUSE;
588 break;
589 default:
590 dev_err(info->dev,
591 "failed to detect %s key (adc:0x%x)\n",
592 attached ? "pressed" : "released", button_type);
593 return -EINVAL;
594 }
595
596 input_event(dock, EV_KEY, code, attached);
597 input_sync(dock);
598
599 return 0;
600 }
601
602 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
603 {
604 int cable_type_gnd;
605 int ret = 0;
606 bool attached;
607
608 cable_type_gnd = max77693_muic_get_cable_type(info,
609 MAX77693_CABLE_GROUP_ADC_GND, &attached);
610
611 switch (cable_type_gnd) {
612 case MAX77693_MUIC_GND_USB_HOST:
613 case MAX77693_MUIC_GND_USB_HOST_VB:
614 /* USB_HOST, PATH: AP_USB */
615 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
616 if (ret < 0)
617 return ret;
618 extcon_set_cable_state(info->edev, "USB-Host", attached);
619 break;
620 case MAX77693_MUIC_GND_AV_CABLE_LOAD:
621 /* Audio Video Cable with load, PATH:AUDIO */
622 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
623 if (ret < 0)
624 return ret;
625 extcon_set_cable_state(info->edev,
626 "Audio-video-load", attached);
627 break;
628 case MAX77693_MUIC_GND_MHL:
629 case MAX77693_MUIC_GND_MHL_VB:
630 /* MHL or MHL with USB/TA cable */
631 extcon_set_cable_state(info->edev, "MHL", attached);
632 break;
633 default:
634 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
635 attached ? "attached" : "detached");
636 return -EINVAL;
637 }
638
639 return 0;
640 }
641
642 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
643 int cable_type, bool attached)
644 {
645 char cable_name[32];
646 int ret = 0;
647 u8 path = CONTROL1_SW_OPEN;
648
649 dev_info(info->dev,
650 "external connector is %s (adc:0x%02x)\n",
651 attached ? "attached" : "detached", cable_type);
652
653 switch (cable_type) {
654 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */
655 /* PATH:AP_USB */
656 strcpy(cable_name, "JIG-USB-OFF");
657 path = CONTROL1_SW_USB;
658 break;
659 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
660 /* PATH:AP_USB */
661 strcpy(cable_name, "JIG-USB-ON");
662 path = CONTROL1_SW_USB;
663 break;
664 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
665 /* PATH:AP_UART */
666 strcpy(cable_name, "JIG-UART-OFF");
667 path = CONTROL1_SW_UART;
668 break;
669 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* ADC_JIG_UART_ON */
670 /* PATH:AP_UART */
671 strcpy(cable_name, "JIG-UART-ON");
672 path = CONTROL1_SW_UART;
673 break;
674 default:
675 dev_err(info->dev, "failed to detect %s jig cable\n",
676 attached ? "attached" : "detached");
677 return -EINVAL;
678 }
679
680 ret = max77693_muic_set_path(info, path, attached);
681 if (ret < 0)
682 return ret;
683
684 extcon_set_cable_state(info->edev, cable_name, attached);
685
686 return 0;
687 }
688
689 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
690 {
691 int cable_type;
692 int button_type;
693 bool attached;
694 int ret = 0;
695
696 /* Check accessory state which is either detached or attached */
697 cable_type = max77693_muic_get_cable_type(info,
698 MAX77693_CABLE_GROUP_ADC, &attached);
699
700 dev_info(info->dev,
701 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
702 attached ? "attached" : "detached", cable_type,
703 info->prev_cable_type);
704
705 switch (cable_type) {
706 case MAX77693_MUIC_ADC_GROUND:
707 /* USB_HOST/MHL/Audio */
708 max77693_muic_adc_ground_handler(info);
709 break;
710 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
711 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
712 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
713 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
714 /* JIG */
715 ret = max77693_muic_jig_handler(info, cable_type, attached);
716 if (ret < 0)
717 return ret;
718 break;
719 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
720 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
721 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
722 /*
723 * DOCK device
724 *
725 * The MAX77693 MUIC device can detect total 34 cable type
726 * except of charger cable and MUIC device didn't define
727 * specfic role of cable in the range of from 0x01 to 0x12
728 * of ADC value. So, can use/define cable with no role according
729 * to schema of hardware board.
730 */
731 ret = max77693_muic_dock_handler(info, cable_type, attached);
732 if (ret < 0)
733 return ret;
734 break;
735 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */
736 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */
737 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */
738 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */
739 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */
740 /*
741 * Button of DOCK device
742 * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
743 *
744 * The MAX77693 MUIC device can detect total 34 cable type
745 * except of charger cable and MUIC device didn't define
746 * specfic role of cable in the range of from 0x01 to 0x12
747 * of ADC value. So, can use/define cable with no role according
748 * to schema of hardware board.
749 */
750 if (attached)
751 button_type = info->prev_button_type = cable_type;
752 else
753 button_type = info->prev_button_type;
754
755 ret = max77693_muic_dock_button_handler(info, button_type,
756 attached);
757 if (ret < 0)
758 return ret;
759 break;
760 case MAX77693_MUIC_ADC_SEND_END_BUTTON:
761 case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
762 case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
763 case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
764 case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
765 case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
766 case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
767 case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
768 case MAX77693_MUIC_ADC_RESERVED_ACC_1:
769 case MAX77693_MUIC_ADC_RESERVED_ACC_2:
770 case MAX77693_MUIC_ADC_RESERVED_ACC_4:
771 case MAX77693_MUIC_ADC_RESERVED_ACC_5:
772 case MAX77693_MUIC_ADC_CEA936_AUDIO:
773 case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
774 case MAX77693_MUIC_ADC_TTY_CONVERTER:
775 case MAX77693_MUIC_ADC_UART_CABLE:
776 case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
777 case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
778 /*
779 * This accessory isn't used in general case if it is specially
780 * needed to detect additional accessory, should implement
781 * proper operation when this accessory is attached/detached.
782 */
783 dev_info(info->dev,
784 "accessory is %s but it isn't used (adc:0x%x)\n",
785 attached ? "attached" : "detached", cable_type);
786 return -EAGAIN;
787 default:
788 dev_err(info->dev,
789 "failed to detect %s accessory (adc:0x%x)\n",
790 attached ? "attached" : "detached", cable_type);
791 return -EINVAL;
792 }
793
794 return 0;
795 }
796
797 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
798 {
799 int chg_type;
800 int cable_type_gnd;
801 int cable_type;
802 bool attached;
803 bool cable_attached;
804 int ret = 0;
805
806 chg_type = max77693_muic_get_cable_type(info,
807 MAX77693_CABLE_GROUP_CHG, &attached);
808
809 dev_info(info->dev,
810 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
811 attached ? "attached" : "detached",
812 chg_type, info->prev_chg_type);
813
814 switch (chg_type) {
815 case MAX77693_CHARGER_TYPE_USB:
816 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
817 case MAX77693_CHARGER_TYPE_NONE:
818 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
819 cable_type_gnd = max77693_muic_get_cable_type(info,
820 MAX77693_CABLE_GROUP_ADC_GND,
821 &cable_attached);
822 switch (cable_type_gnd) {
823 case MAX77693_MUIC_GND_MHL:
824 case MAX77693_MUIC_GND_MHL_VB:
825 /*
826 * MHL cable with MHL-TA(USB/TA) cable
827 * - MHL cable include two port(HDMI line and separate
828 * micro-usb port. When the target connect MHL cable,
829 * extcon driver check whether MHL-TA(USB/TA) cable is
830 * connected. If MHL-TA cable is connected, extcon
831 * driver notify state to notifiee for charging battery.
832 *
833 * Features of 'MHL-TA(USB/TA) with MHL cable'
834 * - Support MHL
835 * - Support charging through micro-usb port without
836 * data connection
837 */
838 extcon_set_cable_state(info->edev, "MHL-TA", attached);
839 if (!cable_attached)
840 extcon_set_cable_state(info->edev,
841 "MHL", cable_attached);
842 break;
843 }
844
845 /* Check MAX77693_CABLE_GROUP_ADC type */
846 cable_type = max77693_muic_get_cable_type(info,
847 MAX77693_CABLE_GROUP_ADC,
848 &cable_attached);
849 switch (cable_type) {
850 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
851 /*
852 * Dock-Audio device with USB/TA cable
853 * - Dock device include two port(Dock-Audio and micro-
854 * usb port). When the target connect Dock-Audio device,
855 * extcon driver check whether USB/TA cable is connected
856 * or not. If USB/TA cable is connected, extcon driver
857 * notify state to notifiee for charging battery.
858 *
859 * Features of 'USB/TA cable with Dock-Audio device'
860 * - Support external output feature of audio.
861 * - Support charging through micro-usb port without
862 * data connection.
863 */
864 extcon_set_cable_state(info->edev, "USB", attached);
865
866 if (!cable_attached)
867 extcon_set_cable_state(info->edev, "Dock-Audio",
868 cable_attached);
869 break;
870 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
871 /*
872 * Dock-Smart device with USB/TA cable
873 * - Dock-Desk device include three type of cable which
874 * are HDMI, USB for mouse/keyboard and micro-usb port
875 * for USB/TA cable. Dock-Smart device need always
876 * exteranl power supply(USB/TA cable through micro-usb
877 * cable). Dock-Smart device support screen output of
878 * target to separate monitor and mouse/keyboard for
879 * desktop mode.
880 *
881 * Features of 'USB/TA cable with Dock-Smart device'
882 * - Support MHL
883 * - Support external output feature of audio
884 * - Support charging through micro-usb port without
885 * data connection if TA cable is connected to target.
886 * - Support charging and data connection through micro-
887 * usb port if USB cable is connected between target
888 * and host device
889 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
890 */
891 ret = max77693_muic_set_path(info, info->path_usb,
892 attached);
893 if (ret < 0)
894 return ret;
895
896 extcon_set_cable_state(info->edev, "Dock-Smart",
897 attached);
898 extcon_set_cable_state(info->edev, "MHL", attached);
899
900 break;
901 }
902
903 /* Check MAX77693_CABLE_GROUP_CHG type */
904 switch (chg_type) {
905 case MAX77693_CHARGER_TYPE_NONE:
906 /*
907 * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
908 * cable is attached, muic device happen below two irq.
909 * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
910 * MHL/Dock-Audio.
911 * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
912 * USB/TA cable connected to MHL or Dock-Audio.
913 * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
914 * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
915 *
916 * If user attach MHL (with USB/TA cable and immediately
917 * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
918 * _INT2_CHGTYP irq is happened, USB/TA cable remain
919 * connected state to target. But USB/TA cable isn't
920 * connected to target. The user be face with unusual
921 * action. So, driver should check this situation in
922 * spite of, that previous charger type is N/A.
923 */
924 break;
925 case MAX77693_CHARGER_TYPE_USB:
926 /* Only USB cable, PATH:AP_USB */
927 ret = max77693_muic_set_path(info, info->path_usb,
928 attached);
929 if (ret < 0)
930 return ret;
931
932 extcon_set_cable_state(info->edev, "USB", attached);
933 break;
934 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
935 /* Only TA cable */
936 extcon_set_cable_state(info->edev, "TA", attached);
937 break;
938 }
939 break;
940 case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
941 extcon_set_cable_state(info->edev,
942 "Charge-downstream", attached);
943 break;
944 case MAX77693_CHARGER_TYPE_APPLE_500MA:
945 extcon_set_cable_state(info->edev, "Slow-charger", attached);
946 break;
947 case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
948 extcon_set_cable_state(info->edev, "Fast-charger", attached);
949 break;
950 case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
951 break;
952 default:
953 dev_err(info->dev,
954 "failed to detect %s accessory (chg_type:0x%x)\n",
955 attached ? "attached" : "detached", chg_type);
956 return -EINVAL;
957 }
958
959 return 0;
960 }
961
962 static void max77693_muic_irq_work(struct work_struct *work)
963 {
964 struct max77693_muic_info *info = container_of(work,
965 struct max77693_muic_info, irq_work);
966 int irq_type = -1;
967 int i, ret = 0;
968
969 if (!info->edev)
970 return;
971
972 mutex_lock(&info->mutex);
973
974 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
975 if (info->irq == muic_irqs[i].virq)
976 irq_type = muic_irqs[i].irq;
977
978 ret = regmap_bulk_read(info->max77693->regmap_muic,
979 MAX77693_MUIC_REG_STATUS1, info->status, 2);
980 if (ret) {
981 dev_err(info->dev, "failed to read MUIC register\n");
982 mutex_unlock(&info->mutex);
983 return;
984 }
985
986 switch (irq_type) {
987 case MAX77693_MUIC_IRQ_INT1_ADC:
988 case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
989 case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
990 case MAX77693_MUIC_IRQ_INT1_ADC1K:
991 /* Handle all of accessory except for
992 type of charger accessory */
993 ret = max77693_muic_adc_handler(info);
994 break;
995 case MAX77693_MUIC_IRQ_INT2_CHGTYP:
996 case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
997 case MAX77693_MUIC_IRQ_INT2_DCDTMR:
998 case MAX77693_MUIC_IRQ_INT2_DXOVP:
999 case MAX77693_MUIC_IRQ_INT2_VBVOLT:
1000 case MAX77693_MUIC_IRQ_INT2_VIDRM:
1001 /* Handle charger accessory */
1002 ret = max77693_muic_chg_handler(info);
1003 break;
1004 case MAX77693_MUIC_IRQ_INT3_EOC:
1005 case MAX77693_MUIC_IRQ_INT3_CGMBC:
1006 case MAX77693_MUIC_IRQ_INT3_OVP:
1007 case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
1008 case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
1009 case MAX77693_MUIC_IRQ_INT3_BAT_DET:
1010 break;
1011 default:
1012 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
1013 irq_type);
1014 mutex_unlock(&info->mutex);
1015 return;
1016 }
1017
1018 if (ret < 0)
1019 dev_err(info->dev, "failed to handle MUIC interrupt\n");
1020
1021 mutex_unlock(&info->mutex);
1022 }
1023
1024 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1025 {
1026 struct max77693_muic_info *info = data;
1027
1028 info->irq = irq;
1029 schedule_work(&info->irq_work);
1030
1031 return IRQ_HANDLED;
1032 }
1033
1034 static const struct regmap_config max77693_muic_regmap_config = {
1035 .reg_bits = 8,
1036 .val_bits = 8,
1037 };
1038
1039 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1040 {
1041 int ret = 0;
1042 int adc;
1043 int chg_type;
1044 bool attached;
1045
1046 mutex_lock(&info->mutex);
1047
1048 /* Read STATUSx register to detect accessory */
1049 ret = regmap_bulk_read(info->max77693->regmap_muic,
1050 MAX77693_MUIC_REG_STATUS1, info->status, 2);
1051 if (ret) {
1052 dev_err(info->dev, "failed to read MUIC register\n");
1053 mutex_unlock(&info->mutex);
1054 return ret;
1055 }
1056
1057 adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1058 &attached);
1059 if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1060 ret = max77693_muic_adc_handler(info);
1061 if (ret < 0) {
1062 dev_err(info->dev, "Cannot detect accessory\n");
1063 mutex_unlock(&info->mutex);
1064 return ret;
1065 }
1066 }
1067
1068 chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1069 &attached);
1070 if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1071 ret = max77693_muic_chg_handler(info);
1072 if (ret < 0) {
1073 dev_err(info->dev, "Cannot detect charger accessory\n");
1074 mutex_unlock(&info->mutex);
1075 return ret;
1076 }
1077 }
1078
1079 mutex_unlock(&info->mutex);
1080
1081 return 0;
1082 }
1083
1084 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1085 {
1086 struct max77693_muic_info *info = container_of(to_delayed_work(work),
1087 struct max77693_muic_info, wq_detcable);
1088
1089 max77693_muic_detect_accessory(info);
1090 }
1091
1092 static int max77693_muic_probe(struct platform_device *pdev)
1093 {
1094 struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1095 struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1096 struct max77693_muic_info *info;
1097 struct max77693_reg_data *init_data;
1098 int num_init_data;
1099 int delay_jiffies;
1100 int ret;
1101 int i;
1102 unsigned int id;
1103
1104 info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1105 GFP_KERNEL);
1106 if (!info)
1107 return -ENOMEM;
1108
1109 info->dev = &pdev->dev;
1110 info->max77693 = max77693;
1111 if (info->max77693->regmap_muic) {
1112 dev_dbg(&pdev->dev, "allocate register map\n");
1113 } else {
1114 info->max77693->regmap_muic = devm_regmap_init_i2c(
1115 info->max77693->muic,
1116 &max77693_muic_regmap_config);
1117 if (IS_ERR(info->max77693->regmap_muic)) {
1118 ret = PTR_ERR(info->max77693->regmap_muic);
1119 dev_err(max77693->dev,
1120 "failed to allocate register map: %d\n", ret);
1121 return ret;
1122 }
1123 }
1124
1125 /* Register input device for button of dock device */
1126 info->dock = devm_input_allocate_device(&pdev->dev);
1127 if (!info->dock) {
1128 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1129 return -ENOMEM;
1130 }
1131 info->dock->name = "max77693-muic/dock";
1132 info->dock->phys = "max77693-muic/extcon";
1133 info->dock->dev.parent = &pdev->dev;
1134
1135 __set_bit(EV_REP, info->dock->evbit);
1136
1137 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1138 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1139 input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1140 input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1141 input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1142
1143 ret = input_register_device(info->dock);
1144 if (ret < 0) {
1145 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1146 ret);
1147 return ret;
1148 }
1149
1150 platform_set_drvdata(pdev, info);
1151 mutex_init(&info->mutex);
1152
1153 INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1154
1155 /* Support irq domain for MAX77693 MUIC device */
1156 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1157 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1158 unsigned int virq = 0;
1159
1160 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1161 muic_irq->irq);
1162 if (!virq)
1163 return -EINVAL;
1164 muic_irq->virq = virq;
1165
1166 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1167 max77693_muic_irq_handler,
1168 IRQF_NO_SUSPEND,
1169 muic_irq->name, info);
1170 if (ret) {
1171 dev_err(&pdev->dev,
1172 "failed: irq request (IRQ: %d, error :%d)\n",
1173 muic_irq->irq, ret);
1174 return ret;
1175 }
1176 }
1177
1178 /* Initialize extcon device */
1179 info->edev = devm_extcon_dev_allocate(&pdev->dev,
1180 max77693_extcon_cable);
1181 if (IS_ERR(info->edev)) {
1182 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1183 return -ENOMEM;
1184 }
1185 info->edev->name = DEV_NAME;
1186
1187 ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1188 if (ret) {
1189 dev_err(&pdev->dev, "failed to register extcon device\n");
1190 return ret;
1191 }
1192
1193 /* Initialize MUIC register by using platform data or default data */
1194 if (pdata && pdata->muic_data) {
1195 init_data = pdata->muic_data->init_data;
1196 num_init_data = pdata->muic_data->num_init_data;
1197 } else {
1198 init_data = default_init_data;
1199 num_init_data = ARRAY_SIZE(default_init_data);
1200 }
1201
1202 for (i = 0; i < num_init_data; i++) {
1203 enum max77693_irq_source irq_src
1204 = MAX77693_IRQ_GROUP_NR;
1205
1206 regmap_write(info->max77693->regmap_muic,
1207 init_data[i].addr,
1208 init_data[i].data);
1209
1210 switch (init_data[i].addr) {
1211 case MAX77693_MUIC_REG_INTMASK1:
1212 irq_src = MUIC_INT1;
1213 break;
1214 case MAX77693_MUIC_REG_INTMASK2:
1215 irq_src = MUIC_INT2;
1216 break;
1217 case MAX77693_MUIC_REG_INTMASK3:
1218 irq_src = MUIC_INT3;
1219 break;
1220 }
1221
1222 if (irq_src < MAX77693_IRQ_GROUP_NR)
1223 info->max77693->irq_masks_cur[irq_src]
1224 = init_data[i].data;
1225 }
1226
1227 if (pdata && pdata->muic_data) {
1228 struct max77693_muic_platform_data *muic_pdata
1229 = pdata->muic_data;
1230
1231 /*
1232 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1233 * h/w path of COMP2/COMN1 on CONTROL1 register.
1234 */
1235 if (muic_pdata->path_uart)
1236 info->path_uart = muic_pdata->path_uart;
1237 else
1238 info->path_uart = CONTROL1_SW_UART;
1239
1240 if (muic_pdata->path_usb)
1241 info->path_usb = muic_pdata->path_usb;
1242 else
1243 info->path_usb = CONTROL1_SW_USB;
1244
1245 /*
1246 * Default delay time for detecting cable state
1247 * after certain time.
1248 */
1249 if (muic_pdata->detcable_delay_ms)
1250 delay_jiffies =
1251 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1252 else
1253 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1254 } else {
1255 info->path_usb = CONTROL1_SW_USB;
1256 info->path_uart = CONTROL1_SW_UART;
1257 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1258 }
1259
1260 /* Set initial path for UART */
1261 max77693_muic_set_path(info, info->path_uart, true);
1262
1263 /* Check revision number of MUIC device*/
1264 ret = regmap_read(info->max77693->regmap_muic,
1265 MAX77693_MUIC_REG_ID, &id);
1266 if (ret < 0) {
1267 dev_err(&pdev->dev, "failed to read revision number\n");
1268 return ret;
1269 }
1270 dev_info(info->dev, "device ID : 0x%x\n", id);
1271
1272 /* Set ADC debounce time */
1273 max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1274
1275 /*
1276 * Detect accessory after completing the initialization of platform
1277 *
1278 * - Use delayed workqueue to detect cable state and then
1279 * notify cable state to notifiee/platform through uevent.
1280 * After completing the booting of platform, the extcon provider
1281 * driver should notify cable state to upper layer.
1282 */
1283 INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1284 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1285 delay_jiffies);
1286
1287 return ret;
1288 }
1289
1290 static int max77693_muic_remove(struct platform_device *pdev)
1291 {
1292 struct max77693_muic_info *info = platform_get_drvdata(pdev);
1293
1294 cancel_work_sync(&info->irq_work);
1295 input_unregister_device(info->dock);
1296
1297 return 0;
1298 }
1299
1300 static struct platform_driver max77693_muic_driver = {
1301 .driver = {
1302 .name = DEV_NAME,
1303 },
1304 .probe = max77693_muic_probe,
1305 .remove = max77693_muic_remove,
1306 };
1307
1308 module_platform_driver(max77693_muic_driver);
1309
1310 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1311 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1312 MODULE_LICENSE("GPL");
1313 MODULE_ALIAS("platform:extcon-max77693");
Linux with added FPC-III support