1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
4 //
5 // Copyright (C) 2012 Samsung Electrnoics
6 // Chanwoo Choi <cw00.choi@samsung.com>
7
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/i2c.h>
11 #include <linux/slab.h>
12 #include <linux/input.h>
13 #include <linux/interrupt.h>
14 #include <linux/err.h>
15 #include <linux/platform_device.h>
16 #include <linux/mfd/max77693.h>
17 #include <linux/mfd/max77693-common.h>
18 #include <linux/mfd/max77693-private.h>
19 #include <linux/extcon-provider.h>
20 #include <linux/regmap.h>
21 #include <linux/irqdomain.h>
22
23 #define DEV_NAME "max77693-muic"
24 #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
25
26 /*
27 * Default value of MAX77693 register to bring up MUIC device.
28 * If user don't set some initial value for MUIC device through platform data,
29 * extcon-max77693 driver use 'default_init_data' to bring up base operation
30 * of MAX77693 MUIC device.
31 */
32 static struct max77693_reg_data default_init_data[] = {
33 {
34 /* STATUS2 - [3]ChgDetRun */
35 .addr = MAX77693_MUIC_REG_STATUS2,
36 .data = MAX77693_STATUS2_CHGDETRUN_MASK,
37 }, {
38 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
39 .addr = MAX77693_MUIC_REG_INTMASK1,
40 .data = INTMASK1_ADC1K_MASK
41 | INTMASK1_ADC_MASK,
42 }, {
43 /* INTMASK2 - Unmask [0]ChgTypM */
44 .addr = MAX77693_MUIC_REG_INTMASK2,
45 .data = INTMASK2_CHGTYP_MASK,
46 }, {
47 /* INTMASK3 - Mask all of interrupts */
48 .addr = MAX77693_MUIC_REG_INTMASK3,
49 .data = 0x0,
50 }, {
51 /* CDETCTRL2 */
52 .addr = MAX77693_MUIC_REG_CDETCTRL2,
53 .data = CDETCTRL2_VIDRMEN_MASK
54 | CDETCTRL2_DXOVPEN_MASK,
55 },
56 };
57
58 enum max77693_muic_adc_debounce_time {
59 ADC_DEBOUNCE_TIME_5MS = 0,
60 ADC_DEBOUNCE_TIME_10MS,
61 ADC_DEBOUNCE_TIME_25MS,
62 ADC_DEBOUNCE_TIME_38_62MS,
63 };
64
65 struct max77693_muic_info {
66 struct device *dev;
67 struct max77693_dev *max77693;
68 struct extcon_dev *edev;
69 int prev_cable_type;
70 int prev_cable_type_gnd;
71 int prev_chg_type;
72 int prev_button_type;
73 u8 status[2];
74
75 int irq;
76 struct work_struct irq_work;
77 struct mutex mutex;
78
79 /*
80 * Use delayed workqueue to detect cable state and then
81 * notify cable state to notifiee/platform through uevent.
82 * After completing the booting of platform, the extcon provider
83 * driver should notify cable state to upper layer.
84 */
85 struct delayed_work wq_detcable;
86
87 /* Button of dock device */
88 struct input_dev *dock;
89
90 /*
91 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
92 * h/w path of COMP2/COMN1 on CONTROL1 register.
93 */
94 int path_usb;
95 int path_uart;
96 };
97
98 enum max77693_muic_cable_group {
99 MAX77693_CABLE_GROUP_ADC = 0,
100 MAX77693_CABLE_GROUP_ADC_GND,
101 MAX77693_CABLE_GROUP_CHG,
102 MAX77693_CABLE_GROUP_VBVOLT,
103 };
104
105 enum max77693_muic_charger_type {
106 MAX77693_CHARGER_TYPE_NONE = 0,
107 MAX77693_CHARGER_TYPE_USB,
108 MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
109 MAX77693_CHARGER_TYPE_DEDICATED_CHG,
110 MAX77693_CHARGER_TYPE_APPLE_500MA,
111 MAX77693_CHARGER_TYPE_APPLE_1A_2A,
112 MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
113 };
114
115 /**
116 * struct max77693_muic_irq
117 * @irq: the index of irq list of MUIC device.
118 * @name: the name of irq.
119 * @virq: the virtual irq to use irq domain
120 */
121 struct max77693_muic_irq {
122 unsigned int irq;
123 const char *name;
124 unsigned int virq;
125 };
126
127 static struct max77693_muic_irq muic_irqs[] = {
128 { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" },
129 { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" },
130 { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" },
131 { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" },
132 { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
133 { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" },
134 { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
135 { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" },
136 { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
137 { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" },
138 { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" },
139 { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" },
140 { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" },
141 { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" },
142 { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" },
143 { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" },
144 };
145
146 /* Define supported accessory type */
147 enum max77693_muic_acc_type {
148 MAX77693_MUIC_ADC_GROUND = 0x0,
149 MAX77693_MUIC_ADC_SEND_END_BUTTON,
150 MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
151 MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
152 MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
153 MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
154 MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
155 MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
156 MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
157 MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
158 MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
159 MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
160 MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
161 MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
162 MAX77693_MUIC_ADC_RESERVED_ACC_1,
163 MAX77693_MUIC_ADC_RESERVED_ACC_2,
164 MAX77693_MUIC_ADC_RESERVED_ACC_3,
165 MAX77693_MUIC_ADC_RESERVED_ACC_4,
166 MAX77693_MUIC_ADC_RESERVED_ACC_5,
167 MAX77693_MUIC_ADC_CEA936_AUDIO,
168 MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
169 MAX77693_MUIC_ADC_TTY_CONVERTER,
170 MAX77693_MUIC_ADC_UART_CABLE,
171 MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
172 MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
173 MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
174 MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
175 MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
176 MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
177 MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
178 MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
179 MAX77693_MUIC_ADC_OPEN,
180
181 /*
182 * The below accessories have same ADC value so ADCLow and
183 * ADC1K bit is used to separate specific accessory.
184 */
185 /* ADC|VBVolot|ADCLow|ADC1K| */
186 MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */
187 MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */
188 MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */
189 MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */
190 MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */
191 };
192
193 /*
194 * MAX77693 MUIC device support below list of accessories(external connector)
195 */
196 static const unsigned int max77693_extcon_cable[] = {
197 EXTCON_USB,
198 EXTCON_USB_HOST,
199 EXTCON_CHG_USB_SDP,
200 EXTCON_CHG_USB_DCP,
201 EXTCON_CHG_USB_FAST,
202 EXTCON_CHG_USB_SLOW,
203 EXTCON_CHG_USB_CDP,
204 EXTCON_DISP_MHL,
205 EXTCON_JIG,
206 EXTCON_DOCK,
207 EXTCON_NONE,
208 };
209
210 /*
211 * max77693_muic_set_debounce_time - Set the debounce time of ADC
212 * @info: the instance including private data of max77693 MUIC
213 * @time: the debounce time of ADC
214 */
max77693_muic_set_debounce_time(struct max77693_muic_info * info,enum max77693_muic_adc_debounce_time time)215 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
216 enum max77693_muic_adc_debounce_time time)
217 {
218 int ret;
219
220 switch (time) {
221 case ADC_DEBOUNCE_TIME_5MS:
222 case ADC_DEBOUNCE_TIME_10MS:
223 case ADC_DEBOUNCE_TIME_25MS:
224 case ADC_DEBOUNCE_TIME_38_62MS:
225 /*
226 * Don't touch BTLDset, JIGset when you want to change adc
227 * debounce time. If it writes other than 0 to BTLDset, JIGset
228 * muic device will be reset and loose current state.
229 */
230 ret = regmap_write(info->max77693->regmap_muic,
231 MAX77693_MUIC_REG_CTRL3,
232 time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
233 if (ret) {
234 dev_err(info->dev, "failed to set ADC debounce time\n");
235 return ret;
236 }
237 break;
238 default:
239 dev_err(info->dev, "invalid ADC debounce time\n");
240 return -EINVAL;
241 }
242
243 return 0;
244 };
245
246 /*
247 * max77693_muic_set_path - Set hardware line according to attached cable
248 * @info: the instance including private data of max77693 MUIC
249 * @value: the path according to attached cable
250 * @attached: the state of cable (true:attached, false:detached)
251 *
252 * The max77693 MUIC device share outside H/W line among a varity of cables
253 * so, this function set internal path of H/W line according to the type of
254 * attached cable.
255 */
max77693_muic_set_path(struct max77693_muic_info * info,u8 val,bool attached)256 static int max77693_muic_set_path(struct max77693_muic_info *info,
257 u8 val, bool attached)
258 {
259 int ret;
260 unsigned int ctrl1, ctrl2 = 0;
261
262 if (attached)
263 ctrl1 = val;
264 else
265 ctrl1 = MAX77693_CONTROL1_SW_OPEN;
266
267 ret = regmap_update_bits(info->max77693->regmap_muic,
268 MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
269 if (ret < 0) {
270 dev_err(info->dev, "failed to update MUIC register\n");
271 return ret;
272 }
273
274 if (attached)
275 ctrl2 |= MAX77693_CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
276 else
277 ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
278
279 ret = regmap_update_bits(info->max77693->regmap_muic,
280 MAX77693_MUIC_REG_CTRL2,
281 MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
282 ctrl2);
283 if (ret < 0) {
284 dev_err(info->dev, "failed to update MUIC register\n");
285 return ret;
286 }
287
288 dev_info(info->dev,
289 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
290 ctrl1, ctrl2, attached ? "attached" : "detached");
291
292 return 0;
293 }
294
295 /*
296 * max77693_muic_get_cable_type - Return cable type and check cable state
297 * @info: the instance including private data of max77693 MUIC
298 * @group: the path according to attached cable
299 * @attached: store cable state and return
300 *
301 * This function check the cable state either attached or detached,
302 * and then divide precise type of cable according to cable group.
303 * - MAX77693_CABLE_GROUP_ADC
304 * - MAX77693_CABLE_GROUP_ADC_GND
305 * - MAX77693_CABLE_GROUP_CHG
306 * - MAX77693_CABLE_GROUP_VBVOLT
307 */
max77693_muic_get_cable_type(struct max77693_muic_info * info,enum max77693_muic_cable_group group,bool * attached)308 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
309 enum max77693_muic_cable_group group, bool *attached)
310 {
311 int cable_type = 0;
312 int adc;
313 int adc1k;
314 int adclow;
315 int vbvolt;
316 int chg_type;
317
318 switch (group) {
319 case MAX77693_CABLE_GROUP_ADC:
320 /*
321 * Read ADC value to check cable type and decide cable state
322 * according to cable type
323 */
324 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
325 adc >>= MAX77693_STATUS1_ADC_SHIFT;
326
327 /*
328 * Check current cable state/cable type and store cable type
329 * (info->prev_cable_type) for handling cable when cable is
330 * detached.
331 */
332 if (adc == MAX77693_MUIC_ADC_OPEN) {
333 *attached = false;
334
335 cable_type = info->prev_cable_type;
336 info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
337 } else {
338 *attached = true;
339
340 cable_type = info->prev_cable_type = adc;
341 }
342 break;
343 case MAX77693_CABLE_GROUP_ADC_GND:
344 /*
345 * Read ADC value to check cable type and decide cable state
346 * according to cable type
347 */
348 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
349 adc >>= MAX77693_STATUS1_ADC_SHIFT;
350
351 /*
352 * Check current cable state/cable type and store cable type
353 * (info->prev_cable_type/_gnd) for handling cable when cable
354 * is detached.
355 */
356 if (adc == MAX77693_MUIC_ADC_OPEN) {
357 *attached = false;
358
359 cable_type = info->prev_cable_type_gnd;
360 info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
361 } else {
362 *attached = true;
363
364 adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
365 adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
366 adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
367 adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
368
369 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
370 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
371
372 /**
373 * [0x1|VBVolt|ADCLow|ADC1K]
374 * [0x1| 0| 0| 0] USB_HOST
375 * [0x1| 1| 0| 0] USB_HSOT_VB
376 * [0x1| 0| 1| 0] Audio Video cable with load
377 * [0x1| 0| 1| 1] MHL without charging cable
378 * [0x1| 1| 1| 1] MHL with charging cable
379 */
380 cable_type = ((0x1 << 8)
381 | (vbvolt << 2)
382 | (adclow << 1)
383 | adc1k);
384
385 info->prev_cable_type = adc;
386 info->prev_cable_type_gnd = cable_type;
387 }
388
389 break;
390 case MAX77693_CABLE_GROUP_CHG:
391 /*
392 * Read charger type to check cable type and decide cable state
393 * according to type of charger cable.
394 */
395 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
396 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
397
398 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
399 *attached = false;
400
401 cable_type = info->prev_chg_type;
402 info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
403 } else {
404 *attached = true;
405
406 /*
407 * Check current cable state/cable type and store cable
408 * type(info->prev_chg_type) for handling cable when
409 * charger cable is detached.
410 */
411 cable_type = info->prev_chg_type = chg_type;
412 }
413
414 break;
415 case MAX77693_CABLE_GROUP_VBVOLT:
416 /*
417 * Read ADC value to check cable type and decide cable state
418 * according to cable type
419 */
420 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
421 adc >>= MAX77693_STATUS1_ADC_SHIFT;
422 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
423 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
424
425 if (adc == MAX77693_MUIC_ADC_OPEN
426 && chg_type == MAX77693_CHARGER_TYPE_NONE)
427 *attached = false;
428 else
429 *attached = true;
430
431 /*
432 * Read vbvolt field, if vbvolt is 1,
433 * this cable is used for charging.
434 */
435 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
436 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
437
438 cable_type = vbvolt;
439 break;
440 default:
441 dev_err(info->dev, "Unknown cable group (%d)\n", group);
442 cable_type = -EINVAL;
443 break;
444 }
445
446 return cable_type;
447 }
448
max77693_muic_dock_handler(struct max77693_muic_info * info,int cable_type,bool attached)449 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
450 int cable_type, bool attached)
451 {
452 int ret = 0;
453 int vbvolt;
454 bool cable_attached;
455 unsigned int dock_id;
456
457 dev_info(info->dev,
458 "external connector is %s (adc:0x%02x)\n",
459 attached ? "attached" : "detached", cable_type);
460
461 switch (cable_type) {
462 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
463 /*
464 * Check power cable whether attached or detached state.
465 * The Dock-Smart device need surely external power supply.
466 * If power cable(USB/TA) isn't connected to Dock device,
467 * user can't use Dock-Smart for desktop mode.
468 */
469 vbvolt = max77693_muic_get_cable_type(info,
470 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
471 if (attached && !vbvolt) {
472 dev_warn(info->dev,
473 "Cannot detect external power supply\n");
474 return 0;
475 }
476
477 /*
478 * Notify Dock/MHL state.
479 * - Dock device include three type of cable which
480 * are HDMI, USB for mouse/keyboard and micro-usb port
481 * for USB/TA cable. Dock device need always exteranl
482 * power supply(USB/TA cable through micro-usb cable). Dock
483 * device support screen output of target to separate
484 * monitor and mouse/keyboard for desktop mode.
485 *
486 * Features of 'USB/TA cable with Dock device'
487 * - Support MHL
488 * - Support external output feature of audio
489 * - Support charging through micro-usb port without data
490 * connection if TA cable is connected to target.
491 * - Support charging and data connection through micro-usb port
492 * if USB cable is connected between target and host
493 * device.
494 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
495 */
496 ret = max77693_muic_set_path(info, info->path_usb, attached);
497 if (ret < 0)
498 return ret;
499
500 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
501 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
502 goto out;
503 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
504 dock_id = EXTCON_DOCK;
505 break;
506 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
507 dock_id = EXTCON_DOCK;
508 if (!attached) {
509 extcon_set_state_sync(info->edev, EXTCON_USB, false);
510 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
511 false);
512 }
513 break;
514 default:
515 dev_err(info->dev, "failed to detect %s dock device\n",
516 attached ? "attached" : "detached");
517 return -EINVAL;
518 }
519
520 /* Dock-Car/Desk/Audio, PATH:AUDIO */
521 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
522 attached);
523 if (ret < 0)
524 return ret;
525 extcon_set_state_sync(info->edev, dock_id, attached);
526
527 out:
528 return 0;
529 }
530
max77693_muic_dock_button_handler(struct max77693_muic_info * info,int button_type,bool attached)531 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
532 int button_type, bool attached)
533 {
534 struct input_dev *dock = info->dock;
535 unsigned int code;
536
537 switch (button_type) {
538 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
539 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
540 /* DOCK_KEY_PREV */
541 code = KEY_PREVIOUSSONG;
542 break;
543 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
544 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
545 /* DOCK_KEY_NEXT */
546 code = KEY_NEXTSONG;
547 break;
548 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
549 /* DOCK_VOL_DOWN */
550 code = KEY_VOLUMEDOWN;
551 break;
552 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
553 /* DOCK_VOL_UP */
554 code = KEY_VOLUMEUP;
555 break;
556 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
557 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
558 /* DOCK_KEY_PLAY_PAUSE */
559 code = KEY_PLAYPAUSE;
560 break;
561 default:
562 dev_err(info->dev,
563 "failed to detect %s key (adc:0x%x)\n",
564 attached ? "pressed" : "released", button_type);
565 return -EINVAL;
566 }
567
568 input_event(dock, EV_KEY, code, attached);
569 input_sync(dock);
570
571 return 0;
572 }
573
max77693_muic_adc_ground_handler(struct max77693_muic_info * info)574 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
575 {
576 int cable_type_gnd;
577 int ret = 0;
578 bool attached;
579
580 cable_type_gnd = max77693_muic_get_cable_type(info,
581 MAX77693_CABLE_GROUP_ADC_GND, &attached);
582
583 switch (cable_type_gnd) {
584 case MAX77693_MUIC_GND_USB_HOST:
585 case MAX77693_MUIC_GND_USB_HOST_VB:
586 /* USB_HOST, PATH: AP_USB */
587 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
588 attached);
589 if (ret < 0)
590 return ret;
591 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
592 break;
593 case MAX77693_MUIC_GND_AV_CABLE_LOAD:
594 /* Audio Video Cable with load, PATH:AUDIO */
595 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
596 attached);
597 if (ret < 0)
598 return ret;
599 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
600 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
601 attached);
602 break;
603 case MAX77693_MUIC_GND_MHL:
604 case MAX77693_MUIC_GND_MHL_VB:
605 /* MHL or MHL with USB/TA cable */
606 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
607 break;
608 default:
609 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
610 attached ? "attached" : "detached");
611 return -EINVAL;
612 }
613
614 return 0;
615 }
616
max77693_muic_jig_handler(struct max77693_muic_info * info,int cable_type,bool attached)617 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
618 int cable_type, bool attached)
619 {
620 int ret = 0;
621 u8 path = MAX77693_CONTROL1_SW_OPEN;
622
623 dev_info(info->dev,
624 "external connector is %s (adc:0x%02x)\n",
625 attached ? "attached" : "detached", cable_type);
626
627 switch (cable_type) {
628 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */
629 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
630 /* PATH:AP_USB */
631 path = MAX77693_CONTROL1_SW_USB;
632 break;
633 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
634 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* ADC_JIG_UART_ON */
635 /* PATH:AP_UART */
636 path = MAX77693_CONTROL1_SW_UART;
637 break;
638 default:
639 dev_err(info->dev, "failed to detect %s jig cable\n",
640 attached ? "attached" : "detached");
641 return -EINVAL;
642 }
643
644 ret = max77693_muic_set_path(info, path, attached);
645 if (ret < 0)
646 return ret;
647
648 extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
649
650 return 0;
651 }
652
max77693_muic_adc_handler(struct max77693_muic_info * info)653 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
654 {
655 int cable_type;
656 int button_type;
657 bool attached;
658 int ret = 0;
659
660 /* Check accessory state which is either detached or attached */
661 cable_type = max77693_muic_get_cable_type(info,
662 MAX77693_CABLE_GROUP_ADC, &attached);
663
664 dev_info(info->dev,
665 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
666 attached ? "attached" : "detached", cable_type,
667 info->prev_cable_type);
668
669 switch (cable_type) {
670 case MAX77693_MUIC_ADC_GROUND:
671 /* USB_HOST/MHL/Audio */
672 max77693_muic_adc_ground_handler(info);
673 break;
674 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
675 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
676 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
677 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
678 /* JIG */
679 ret = max77693_muic_jig_handler(info, cable_type, attached);
680 if (ret < 0)
681 return ret;
682 break;
683 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
684 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
685 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
686 /*
687 * DOCK device
688 *
689 * The MAX77693 MUIC device can detect total 34 cable type
690 * except of charger cable and MUIC device didn't define
691 * specfic role of cable in the range of from 0x01 to 0x12
692 * of ADC value. So, can use/define cable with no role according
693 * to schema of hardware board.
694 */
695 ret = max77693_muic_dock_handler(info, cable_type, attached);
696 if (ret < 0)
697 return ret;
698 break;
699 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */
700 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */
701 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */
702 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */
703 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */
704 /*
705 * Button of DOCK device
706 * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
707 *
708 * The MAX77693 MUIC device can detect total 34 cable type
709 * except of charger cable and MUIC device didn't define
710 * specfic role of cable in the range of from 0x01 to 0x12
711 * of ADC value. So, can use/define cable with no role according
712 * to schema of hardware board.
713 */
714 if (attached)
715 button_type = info->prev_button_type = cable_type;
716 else
717 button_type = info->prev_button_type;
718
719 ret = max77693_muic_dock_button_handler(info, button_type,
720 attached);
721 if (ret < 0)
722 return ret;
723 break;
724 case MAX77693_MUIC_ADC_SEND_END_BUTTON:
725 case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
726 case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
727 case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
728 case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
729 case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
730 case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
731 case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
732 case MAX77693_MUIC_ADC_RESERVED_ACC_1:
733 case MAX77693_MUIC_ADC_RESERVED_ACC_2:
734 case MAX77693_MUIC_ADC_RESERVED_ACC_4:
735 case MAX77693_MUIC_ADC_RESERVED_ACC_5:
736 case MAX77693_MUIC_ADC_CEA936_AUDIO:
737 case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
738 case MAX77693_MUIC_ADC_TTY_CONVERTER:
739 case MAX77693_MUIC_ADC_UART_CABLE:
740 case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
741 case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
742 /*
743 * This accessory isn't used in general case if it is specially
744 * needed to detect additional accessory, should implement
745 * proper operation when this accessory is attached/detached.
746 */
747 dev_info(info->dev,
748 "accessory is %s but it isn't used (adc:0x%x)\n",
749 attached ? "attached" : "detached", cable_type);
750 return -EAGAIN;
751 default:
752 dev_err(info->dev,
753 "failed to detect %s accessory (adc:0x%x)\n",
754 attached ? "attached" : "detached", cable_type);
755 return -EINVAL;
756 }
757
758 return 0;
759 }
760
max77693_muic_chg_handler(struct max77693_muic_info * info)761 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
762 {
763 int chg_type;
764 int cable_type_gnd;
765 int cable_type;
766 bool attached;
767 bool cable_attached;
768 int ret = 0;
769
770 chg_type = max77693_muic_get_cable_type(info,
771 MAX77693_CABLE_GROUP_CHG, &attached);
772
773 dev_info(info->dev,
774 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
775 attached ? "attached" : "detached",
776 chg_type, info->prev_chg_type);
777
778 switch (chg_type) {
779 case MAX77693_CHARGER_TYPE_USB:
780 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
781 case MAX77693_CHARGER_TYPE_NONE:
782 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
783 cable_type_gnd = max77693_muic_get_cable_type(info,
784 MAX77693_CABLE_GROUP_ADC_GND,
785 &cable_attached);
786 switch (cable_type_gnd) {
787 case MAX77693_MUIC_GND_MHL:
788 case MAX77693_MUIC_GND_MHL_VB:
789 /*
790 * MHL cable with USB/TA cable
791 * - MHL cable include two port(HDMI line and separate
792 * micro-usb port. When the target connect MHL cable,
793 * extcon driver check whether USB/TA cable is
794 * connected. If USB/TA cable is connected, extcon
795 * driver notify state to notifiee for charging battery.
796 *
797 * Features of 'USB/TA with MHL cable'
798 * - Support MHL
799 * - Support charging through micro-usb port without
800 * data connection
801 */
802 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
803 attached);
804 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
805 cable_attached);
806 break;
807 }
808
809 /* Check MAX77693_CABLE_GROUP_ADC type */
810 cable_type = max77693_muic_get_cable_type(info,
811 MAX77693_CABLE_GROUP_ADC,
812 &cable_attached);
813 switch (cable_type) {
814 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
815 /*
816 * Dock-Audio device with USB/TA cable
817 * - Dock device include two port(Dock-Audio and micro-
818 * usb port). When the target connect Dock-Audio device,
819 * extcon driver check whether USB/TA cable is connected
820 * or not. If USB/TA cable is connected, extcon driver
821 * notify state to notifiee for charging battery.
822 *
823 * Features of 'USB/TA cable with Dock-Audio device'
824 * - Support external output feature of audio.
825 * - Support charging through micro-usb port without
826 * data connection.
827 */
828 extcon_set_state_sync(info->edev, EXTCON_USB,
829 attached);
830 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
831 attached);
832
833 if (!cable_attached)
834 extcon_set_state_sync(info->edev, EXTCON_DOCK,
835 cable_attached);
836 break;
837 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
838 /*
839 * Dock-Smart device with USB/TA cable
840 * - Dock-Desk device include three type of cable which
841 * are HDMI, USB for mouse/keyboard and micro-usb port
842 * for USB/TA cable. Dock-Smart device need always
843 * exteranl power supply(USB/TA cable through micro-usb
844 * cable). Dock-Smart device support screen output of
845 * target to separate monitor and mouse/keyboard for
846 * desktop mode.
847 *
848 * Features of 'USB/TA cable with Dock-Smart device'
849 * - Support MHL
850 * - Support external output feature of audio
851 * - Support charging through micro-usb port without
852 * data connection if TA cable is connected to target.
853 * - Support charging and data connection through micro-
854 * usb port if USB cable is connected between target
855 * and host device
856 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
857 */
858 ret = max77693_muic_set_path(info, info->path_usb,
859 attached);
860 if (ret < 0)
861 return ret;
862
863 extcon_set_state_sync(info->edev, EXTCON_DOCK,
864 attached);
865 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
866 attached);
867 break;
868 }
869
870 /* Check MAX77693_CABLE_GROUP_CHG type */
871 switch (chg_type) {
872 case MAX77693_CHARGER_TYPE_NONE:
873 /*
874 * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
875 * cable is attached, muic device happen below two irq.
876 * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
877 * MHL/Dock-Audio.
878 * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
879 * USB/TA cable connected to MHL or Dock-Audio.
880 * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
881 * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
882 *
883 * If user attach MHL (with USB/TA cable and immediately
884 * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
885 * _INT2_CHGTYP irq is happened, USB/TA cable remain
886 * connected state to target. But USB/TA cable isn't
887 * connected to target. The user be face with unusual
888 * action. So, driver should check this situation in
889 * spite of, that previous charger type is N/A.
890 */
891 break;
892 case MAX77693_CHARGER_TYPE_USB:
893 /* Only USB cable, PATH:AP_USB */
894 ret = max77693_muic_set_path(info, info->path_usb,
895 attached);
896 if (ret < 0)
897 return ret;
898
899 extcon_set_state_sync(info->edev, EXTCON_USB,
900 attached);
901 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
902 attached);
903 break;
904 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
905 /* Only TA cable */
906 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
907 attached);
908 break;
909 }
910 break;
911 case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
912 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
913 attached);
914 break;
915 case MAX77693_CHARGER_TYPE_APPLE_500MA:
916 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
917 attached);
918 break;
919 case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
920 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
921 attached);
922 break;
923 case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
924 break;
925 default:
926 dev_err(info->dev,
927 "failed to detect %s accessory (chg_type:0x%x)\n",
928 attached ? "attached" : "detached", chg_type);
929 return -EINVAL;
930 }
931
932 return 0;
933 }
934
max77693_muic_irq_work(struct work_struct * work)935 static void max77693_muic_irq_work(struct work_struct *work)
936 {
937 struct max77693_muic_info *info = container_of(work,
938 struct max77693_muic_info, irq_work);
939 int irq_type = -1;
940 int i, ret = 0;
941
942 if (!info->edev)
943 return;
944
945 mutex_lock(&info->mutex);
946
947 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
948 if (info->irq == muic_irqs[i].virq)
949 irq_type = muic_irqs[i].irq;
950
951 ret = regmap_bulk_read(info->max77693->regmap_muic,
952 MAX77693_MUIC_REG_STATUS1, info->status, 2);
953 if (ret) {
954 dev_err(info->dev, "failed to read MUIC register\n");
955 mutex_unlock(&info->mutex);
956 return;
957 }
958
959 switch (irq_type) {
960 case MAX77693_MUIC_IRQ_INT1_ADC:
961 case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
962 case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
963 case MAX77693_MUIC_IRQ_INT1_ADC1K:
964 /*
965 * Handle all of accessory except for
966 * type of charger accessory.
967 */
968 ret = max77693_muic_adc_handler(info);
969 break;
970 case MAX77693_MUIC_IRQ_INT2_CHGTYP:
971 case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
972 case MAX77693_MUIC_IRQ_INT2_DCDTMR:
973 case MAX77693_MUIC_IRQ_INT2_DXOVP:
974 case MAX77693_MUIC_IRQ_INT2_VBVOLT:
975 case MAX77693_MUIC_IRQ_INT2_VIDRM:
976 /* Handle charger accessory */
977 ret = max77693_muic_chg_handler(info);
978 break;
979 case MAX77693_MUIC_IRQ_INT3_EOC:
980 case MAX77693_MUIC_IRQ_INT3_CGMBC:
981 case MAX77693_MUIC_IRQ_INT3_OVP:
982 case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
983 case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
984 case MAX77693_MUIC_IRQ_INT3_BAT_DET:
985 break;
986 default:
987 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
988 irq_type);
989 mutex_unlock(&info->mutex);
990 return;
991 }
992
993 if (ret < 0)
994 dev_err(info->dev, "failed to handle MUIC interrupt\n");
995
996 mutex_unlock(&info->mutex);
997 }
998
max77693_muic_irq_handler(int irq,void * data)999 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1000 {
1001 struct max77693_muic_info *info = data;
1002
1003 info->irq = irq;
1004 schedule_work(&info->irq_work);
1005
1006 return IRQ_HANDLED;
1007 }
1008
1009 static const struct regmap_config max77693_muic_regmap_config = {
1010 .reg_bits = 8,
1011 .val_bits = 8,
1012 };
1013
max77693_muic_detect_accessory(struct max77693_muic_info * info)1014 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1015 {
1016 int ret = 0;
1017 int adc;
1018 int chg_type;
1019 bool attached;
1020
1021 mutex_lock(&info->mutex);
1022
1023 /* Read STATUSx register to detect accessory */
1024 ret = regmap_bulk_read(info->max77693->regmap_muic,
1025 MAX77693_MUIC_REG_STATUS1, info->status, 2);
1026 if (ret) {
1027 dev_err(info->dev, "failed to read MUIC register\n");
1028 mutex_unlock(&info->mutex);
1029 return ret;
1030 }
1031
1032 adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1033 &attached);
1034 if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1035 ret = max77693_muic_adc_handler(info);
1036 if (ret < 0) {
1037 dev_err(info->dev, "Cannot detect accessory\n");
1038 mutex_unlock(&info->mutex);
1039 return ret;
1040 }
1041 }
1042
1043 chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1044 &attached);
1045 if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1046 ret = max77693_muic_chg_handler(info);
1047 if (ret < 0) {
1048 dev_err(info->dev, "Cannot detect charger accessory\n");
1049 mutex_unlock(&info->mutex);
1050 return ret;
1051 }
1052 }
1053
1054 mutex_unlock(&info->mutex);
1055
1056 return 0;
1057 }
1058
max77693_muic_detect_cable_wq(struct work_struct * work)1059 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1060 {
1061 struct max77693_muic_info *info = container_of(to_delayed_work(work),
1062 struct max77693_muic_info, wq_detcable);
1063
1064 max77693_muic_detect_accessory(info);
1065 }
1066
max77693_muic_probe(struct platform_device * pdev)1067 static int max77693_muic_probe(struct platform_device *pdev)
1068 {
1069 struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1070 struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1071 struct max77693_muic_info *info;
1072 struct max77693_reg_data *init_data;
1073 int num_init_data;
1074 int delay_jiffies;
1075 int cable_type;
1076 bool attached;
1077 int ret;
1078 int i;
1079 unsigned int id;
1080
1081 info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1082 GFP_KERNEL);
1083 if (!info)
1084 return -ENOMEM;
1085
1086 info->dev = &pdev->dev;
1087 info->max77693 = max77693;
1088 if (info->max77693->regmap_muic) {
1089 dev_dbg(&pdev->dev, "allocate register map\n");
1090 } else {
1091 info->max77693->regmap_muic = devm_regmap_init_i2c(
1092 info->max77693->i2c_muic,
1093 &max77693_muic_regmap_config);
1094 if (IS_ERR(info->max77693->regmap_muic)) {
1095 ret = PTR_ERR(info->max77693->regmap_muic);
1096 dev_err(max77693->dev,
1097 "failed to allocate register map: %d\n", ret);
1098 return ret;
1099 }
1100 }
1101
1102 /* Register input device for button of dock device */
1103 info->dock = devm_input_allocate_device(&pdev->dev);
1104 if (!info->dock) {
1105 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1106 return -ENOMEM;
1107 }
1108 info->dock->name = "max77693-muic/dock";
1109 info->dock->phys = "max77693-muic/extcon";
1110 info->dock->dev.parent = &pdev->dev;
1111
1112 __set_bit(EV_REP, info->dock->evbit);
1113
1114 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1115 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1116 input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1117 input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1118 input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1119
1120 ret = input_register_device(info->dock);
1121 if (ret < 0) {
1122 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1123 ret);
1124 return ret;
1125 }
1126
1127 platform_set_drvdata(pdev, info);
1128 mutex_init(&info->mutex);
1129
1130 INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1131
1132 /* Support irq domain for MAX77693 MUIC device */
1133 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1134 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1135 int virq;
1136
1137 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1138 muic_irq->irq);
1139 if (virq <= 0)
1140 return -EINVAL;
1141 muic_irq->virq = virq;
1142
1143 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1144 max77693_muic_irq_handler,
1145 IRQF_NO_SUSPEND,
1146 muic_irq->name, info);
1147 if (ret) {
1148 dev_err(&pdev->dev,
1149 "failed: irq request (IRQ: %d, error :%d)\n",
1150 muic_irq->irq, ret);
1151 return ret;
1152 }
1153 }
1154
1155 /* Initialize extcon device */
1156 info->edev = devm_extcon_dev_allocate(&pdev->dev,
1157 max77693_extcon_cable);
1158 if (IS_ERR(info->edev)) {
1159 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1160 return -ENOMEM;
1161 }
1162
1163 ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1164 if (ret) {
1165 dev_err(&pdev->dev, "failed to register extcon device\n");
1166 return ret;
1167 }
1168
1169 /* Initialize MUIC register by using platform data or default data */
1170 if (pdata && pdata->muic_data) {
1171 init_data = pdata->muic_data->init_data;
1172 num_init_data = pdata->muic_data->num_init_data;
1173 } else {
1174 init_data = default_init_data;
1175 num_init_data = ARRAY_SIZE(default_init_data);
1176 }
1177
1178 for (i = 0; i < num_init_data; i++) {
1179 regmap_write(info->max77693->regmap_muic,
1180 init_data[i].addr,
1181 init_data[i].data);
1182 }
1183
1184 if (pdata && pdata->muic_data) {
1185 struct max77693_muic_platform_data *muic_pdata
1186 = pdata->muic_data;
1187
1188 /*
1189 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1190 * h/w path of COMP2/COMN1 on CONTROL1 register.
1191 */
1192 if (muic_pdata->path_uart)
1193 info->path_uart = muic_pdata->path_uart;
1194 else
1195 info->path_uart = MAX77693_CONTROL1_SW_UART;
1196
1197 if (muic_pdata->path_usb)
1198 info->path_usb = muic_pdata->path_usb;
1199 else
1200 info->path_usb = MAX77693_CONTROL1_SW_USB;
1201
1202 /*
1203 * Default delay time for detecting cable state
1204 * after certain time.
1205 */
1206 if (muic_pdata->detcable_delay_ms)
1207 delay_jiffies =
1208 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1209 else
1210 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1211 } else {
1212 info->path_usb = MAX77693_CONTROL1_SW_USB;
1213 info->path_uart = MAX77693_CONTROL1_SW_UART;
1214 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1215 }
1216
1217 /* Set initial path for UART when JIG is connected to get serial logs */
1218 ret = regmap_bulk_read(info->max77693->regmap_muic,
1219 MAX77693_MUIC_REG_STATUS1, info->status, 2);
1220 if (ret) {
1221 dev_err(info->dev, "failed to read MUIC register\n");
1222 return ret;
1223 }
1224 cable_type = max77693_muic_get_cable_type(info,
1225 MAX77693_CABLE_GROUP_ADC, &attached);
1226 if (attached && (cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON ||
1227 cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF))
1228 max77693_muic_set_path(info, info->path_uart, true);
1229
1230 /* Check revision number of MUIC device*/
1231 ret = regmap_read(info->max77693->regmap_muic,
1232 MAX77693_MUIC_REG_ID, &id);
1233 if (ret < 0) {
1234 dev_err(&pdev->dev, "failed to read revision number\n");
1235 return ret;
1236 }
1237 dev_info(info->dev, "device ID : 0x%x\n", id);
1238
1239 /* Set ADC debounce time */
1240 max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1241
1242 /*
1243 * Detect accessory after completing the initialization of platform
1244 *
1245 * - Use delayed workqueue to detect cable state and then
1246 * notify cable state to notifiee/platform through uevent.
1247 * After completing the booting of platform, the extcon provider
1248 * driver should notify cable state to upper layer.
1249 */
1250 INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1251 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1252 delay_jiffies);
1253
1254 return ret;
1255 }
1256
max77693_muic_remove(struct platform_device * pdev)1257 static int max77693_muic_remove(struct platform_device *pdev)
1258 {
1259 struct max77693_muic_info *info = platform_get_drvdata(pdev);
1260
1261 cancel_work_sync(&info->irq_work);
1262 input_unregister_device(info->dock);
1263
1264 return 0;
1265 }
1266
1267 static struct platform_driver max77693_muic_driver = {
1268 .driver = {
1269 .name = DEV_NAME,
1270 },
1271 .probe = max77693_muic_probe,
1272 .remove = max77693_muic_remove,
1273 };
1274
1275 module_platform_driver(max77693_muic_driver);
1276
1277 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1278 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1279 MODULE_LICENSE("GPL");
1280 MODULE_ALIAS("platform:extcon-max77693");
1281