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ARM: perf: use pr_* instead of printk
[linux/fpc-iii.git] / drivers / extcon / extcon-max77693.c
blob490e27475bac08d6c883fb9ef1d4bf70ba7e4dc9
1 /*
2 * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
3 *
4 * Copyright (C) 2012 Samsung Electrnoics
5 * Chanwoo Choi <cw00.choi@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/i2c.h>
21 #include <linux/slab.h>
22 #include <linux/input.h>
23 #include <linux/interrupt.h>
24 #include <linux/err.h>
25 #include <linux/platform_device.h>
26 #include <linux/mfd/max77693.h>
27 #include <linux/mfd/max77693-private.h>
28 #include <linux/extcon.h>
29 #include <linux/regmap.h>
30 #include <linux/irqdomain.h>
31
32 #define DEV_NAME "max77693-muic"
33 #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
34
35 /*
36 * Default value of MAX77693 register to bring up MUIC device.
37 * If user don't set some initial value for MUIC device through platform data,
38 * extcon-max77693 driver use 'default_init_data' to bring up base operation
39 * of MAX77693 MUIC device.
40 */
41 static struct max77693_reg_data default_init_data[] = {
42 {
43 /* STATUS2 - [3]ChgDetRun */
44 .addr = MAX77693_MUIC_REG_STATUS2,
45 .data = STATUS2_CHGDETRUN_MASK,
46 }, {
47 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
48 .addr = MAX77693_MUIC_REG_INTMASK1,
49 .data = INTMASK1_ADC1K_MASK
50 | INTMASK1_ADC_MASK,
51 }, {
52 /* INTMASK2 - Unmask [0]ChgTypM */
53 .addr = MAX77693_MUIC_REG_INTMASK2,
54 .data = INTMASK2_CHGTYP_MASK,
55 }, {
56 /* INTMASK3 - Mask all of interrupts */
57 .addr = MAX77693_MUIC_REG_INTMASK3,
58 .data = 0x0,
59 }, {
60 /* CDETCTRL2 */
61 .addr = MAX77693_MUIC_REG_CDETCTRL2,
62 .data = CDETCTRL2_VIDRMEN_MASK
63 | CDETCTRL2_DXOVPEN_MASK,
64 },
65 };
66
67 enum max77693_muic_adc_debounce_time {
68 ADC_DEBOUNCE_TIME_5MS = 0,
69 ADC_DEBOUNCE_TIME_10MS,
70 ADC_DEBOUNCE_TIME_25MS,
71 ADC_DEBOUNCE_TIME_38_62MS,
72 };
73
74 struct max77693_muic_info {
75 struct device *dev;
76 struct max77693_dev *max77693;
77 struct extcon_dev *edev;
78 int prev_cable_type;
79 int prev_cable_type_gnd;
80 int prev_chg_type;
81 int prev_button_type;
82 u8 status[2];
83
84 int irq;
85 struct work_struct irq_work;
86 struct mutex mutex;
87
88 /*
89 * Use delayed workqueue to detect cable state and then
90 * notify cable state to notifiee/platform through uevent.
91 * After completing the booting of platform, the extcon provider
92 * driver should notify cable state to upper layer.
93 */
94 struct delayed_work wq_detcable;
95
96 /* Button of dock device */
97 struct input_dev *dock;
98
99 /*
100 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
101 * h/w path of COMP2/COMN1 on CONTROL1 register.
102 */
103 int path_usb;
104 int path_uart;
105 };
106
107 enum max77693_muic_cable_group {
108 MAX77693_CABLE_GROUP_ADC = 0,
109 MAX77693_CABLE_GROUP_ADC_GND,
110 MAX77693_CABLE_GROUP_CHG,
111 MAX77693_CABLE_GROUP_VBVOLT,
112 };
113
114 enum max77693_muic_charger_type {
115 MAX77693_CHARGER_TYPE_NONE = 0,
116 MAX77693_CHARGER_TYPE_USB,
117 MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
118 MAX77693_CHARGER_TYPE_DEDICATED_CHG,
119 MAX77693_CHARGER_TYPE_APPLE_500MA,
120 MAX77693_CHARGER_TYPE_APPLE_1A_2A,
121 MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
122 };
123
124 /**
125 * struct max77693_muic_irq
126 * @irq: the index of irq list of MUIC device.
127 * @name: the name of irq.
128 * @virq: the virtual irq to use irq domain
129 */
130 struct max77693_muic_irq {
131 unsigned int irq;
132 const char *name;
133 unsigned int virq;
134 };
135
136 static struct max77693_muic_irq muic_irqs[] = {
137 { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" },
138 { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" },
139 { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" },
140 { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" },
141 { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
142 { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" },
143 { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
144 { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" },
145 { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
146 { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" },
147 { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" },
148 { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" },
149 { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" },
150 { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" },
151 { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" },
152 { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" },
153 };
154
155 /* Define supported accessory type */
156 enum max77693_muic_acc_type {
157 MAX77693_MUIC_ADC_GROUND = 0x0,
158 MAX77693_MUIC_ADC_SEND_END_BUTTON,
159 MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
160 MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
161 MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
162 MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
163 MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
164 MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
165 MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
166 MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
167 MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
168 MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
169 MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
170 MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
171 MAX77693_MUIC_ADC_RESERVED_ACC_1,
172 MAX77693_MUIC_ADC_RESERVED_ACC_2,
173 MAX77693_MUIC_ADC_RESERVED_ACC_3,
174 MAX77693_MUIC_ADC_RESERVED_ACC_4,
175 MAX77693_MUIC_ADC_RESERVED_ACC_5,
176 MAX77693_MUIC_ADC_CEA936_AUDIO,
177 MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
178 MAX77693_MUIC_ADC_TTY_CONVERTER,
179 MAX77693_MUIC_ADC_UART_CABLE,
180 MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
181 MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
182 MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
183 MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
184 MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
185 MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
186 MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
187 MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
188 MAX77693_MUIC_ADC_OPEN,
189
190 /* The below accessories have same ADC value so ADCLow and
191 ADC1K bit is used to separate specific accessory */
192 /* ADC|VBVolot|ADCLow|ADC1K| */
193 MAX77693_MUIC_GND_USB_OTG = 0x100, /* 0x0| 0| 0| 0| */
194 MAX77693_MUIC_GND_USB_OTG_VB = 0x104, /* 0x0| 1| 0| 0| */
195 MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */
196 MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */
197 MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */
198 };
199
200 /*
201 * MAX77693 MUIC device support below list of accessories(external connector)
202 */
203 enum {
204 EXTCON_CABLE_USB = 0,
205 EXTCON_CABLE_USB_HOST,
206 EXTCON_CABLE_TA,
207 EXTCON_CABLE_FAST_CHARGER,
208 EXTCON_CABLE_SLOW_CHARGER,
209 EXTCON_CABLE_CHARGE_DOWNSTREAM,
210 EXTCON_CABLE_MHL,
211 EXTCON_CABLE_MHL_TA,
212 EXTCON_CABLE_JIG_USB_ON,
213 EXTCON_CABLE_JIG_USB_OFF,
214 EXTCON_CABLE_JIG_UART_OFF,
215 EXTCON_CABLE_JIG_UART_ON,
216 EXTCON_CABLE_DOCK_SMART,
217 EXTCON_CABLE_DOCK_DESK,
218 EXTCON_CABLE_DOCK_AUDIO,
219
220 _EXTCON_CABLE_NUM,
221 };
222
223 static const char *max77693_extcon_cable[] = {
224 [EXTCON_CABLE_USB] = "USB",
225 [EXTCON_CABLE_USB_HOST] = "USB-Host",
226 [EXTCON_CABLE_TA] = "TA",
227 [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger",
228 [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger",
229 [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream",
230 [EXTCON_CABLE_MHL] = "MHL",
231 [EXTCON_CABLE_MHL_TA] = "MHL_TA",
232 [EXTCON_CABLE_JIG_USB_ON] = "JIG-USB-ON",
233 [EXTCON_CABLE_JIG_USB_OFF] = "JIG-USB-OFF",
234 [EXTCON_CABLE_JIG_UART_OFF] = "JIG-UART-OFF",
235 [EXTCON_CABLE_JIG_UART_ON] = "Dock-Car",
236 [EXTCON_CABLE_DOCK_SMART] = "Dock-Smart",
237 [EXTCON_CABLE_DOCK_DESK] = "Dock-Desk",
238 [EXTCON_CABLE_DOCK_AUDIO] = "Dock-Audio",
239
240 NULL,
241 };
242
243 /*
244 * max77693_muic_set_debounce_time - Set the debounce time of ADC
245 * @info: the instance including private data of max77693 MUIC
246 * @time: the debounce time of ADC
247 */
248 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
249 enum max77693_muic_adc_debounce_time time)
250 {
251 int ret;
252
253 switch (time) {
254 case ADC_DEBOUNCE_TIME_5MS:
255 case ADC_DEBOUNCE_TIME_10MS:
256 case ADC_DEBOUNCE_TIME_25MS:
257 case ADC_DEBOUNCE_TIME_38_62MS:
258 /*
259 * Don't touch BTLDset, JIGset when you want to change adc
260 * debounce time. If it writes other than 0 to BTLDset, JIGset
261 * muic device will be reset and loose current state.
262 */
263 ret = regmap_write(info->max77693->regmap_muic,
264 MAX77693_MUIC_REG_CTRL3,
265 time << CONTROL3_ADCDBSET_SHIFT);
266 if (ret) {
267 dev_err(info->dev, "failed to set ADC debounce time\n");
268 return ret;
269 }
270 break;
271 default:
272 dev_err(info->dev, "invalid ADC debounce time\n");
273 return -EINVAL;
274 }
275
276 return 0;
277 };
278
279 /*
280 * max77693_muic_set_path - Set hardware line according to attached cable
281 * @info: the instance including private data of max77693 MUIC
282 * @value: the path according to attached cable
283 * @attached: the state of cable (true:attached, false:detached)
284 *
285 * The max77693 MUIC device share outside H/W line among a varity of cables
286 * so, this function set internal path of H/W line according to the type of
287 * attached cable.
288 */
289 static int max77693_muic_set_path(struct max77693_muic_info *info,
290 u8 val, bool attached)
291 {
292 int ret = 0;
293 unsigned int ctrl1, ctrl2 = 0;
294
295 if (attached)
296 ctrl1 = val;
297 else
298 ctrl1 = CONTROL1_SW_OPEN;
299
300 ret = regmap_update_bits(info->max77693->regmap_muic,
301 MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
302 if (ret < 0) {
303 dev_err(info->dev, "failed to update MUIC register\n");
304 return ret;
305 }
306
307 if (attached)
308 ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
309 else
310 ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
311
312 ret = regmap_update_bits(info->max77693->regmap_muic,
313 MAX77693_MUIC_REG_CTRL2,
314 CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK, ctrl2);
315 if (ret < 0) {
316 dev_err(info->dev, "failed to update MUIC register\n");
317 return ret;
318 }
319
320 dev_info(info->dev,
321 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
322 ctrl1, ctrl2, attached ? "attached" : "detached");
323
324 return 0;
325 }
326
327 /*
328 * max77693_muic_get_cable_type - Return cable type and check cable state
329 * @info: the instance including private data of max77693 MUIC
330 * @group: the path according to attached cable
331 * @attached: store cable state and return
332 *
333 * This function check the cable state either attached or detached,
334 * and then divide precise type of cable according to cable group.
335 * - MAX77693_CABLE_GROUP_ADC
336 * - MAX77693_CABLE_GROUP_ADC_GND
337 * - MAX77693_CABLE_GROUP_CHG
338 * - MAX77693_CABLE_GROUP_VBVOLT
339 */
340 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
341 enum max77693_muic_cable_group group, bool *attached)
342 {
343 int cable_type = 0;
344 int adc;
345 int adc1k;
346 int adclow;
347 int vbvolt;
348 int chg_type;
349
350 switch (group) {
351 case MAX77693_CABLE_GROUP_ADC:
352 /*
353 * Read ADC value to check cable type and decide cable state
354 * according to cable type
355 */
356 adc = info->status[0] & STATUS1_ADC_MASK;
357 adc >>= STATUS1_ADC_SHIFT;
358
359 /*
360 * Check current cable state/cable type and store cable type
361 * (info->prev_cable_type) for handling cable when cable is
362 * detached.
363 */
364 if (adc == MAX77693_MUIC_ADC_OPEN) {
365 *attached = false;
366
367 cable_type = info->prev_cable_type;
368 info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
369 } else {
370 *attached = true;
371
372 cable_type = info->prev_cable_type = adc;
373 }
374 break;
375 case MAX77693_CABLE_GROUP_ADC_GND:
376 /*
377 * Read ADC value to check cable type and decide cable state
378 * according to cable type
379 */
380 adc = info->status[0] & STATUS1_ADC_MASK;
381 adc >>= STATUS1_ADC_SHIFT;
382
383 /*
384 * Check current cable state/cable type and store cable type
385 * (info->prev_cable_type/_gnd) for handling cable when cable
386 * is detached.
387 */
388 if (adc == MAX77693_MUIC_ADC_OPEN) {
389 *attached = false;
390
391 cable_type = info->prev_cable_type_gnd;
392 info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
393 } else {
394 *attached = true;
395
396 adclow = info->status[0] & STATUS1_ADCLOW_MASK;
397 adclow >>= STATUS1_ADCLOW_SHIFT;
398 adc1k = info->status[0] & STATUS1_ADC1K_MASK;
399 adc1k >>= STATUS1_ADC1K_SHIFT;
400
401 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
402 vbvolt >>= STATUS2_VBVOLT_SHIFT;
403
404 /**
405 * [0x1|VBVolt|ADCLow|ADC1K]
406 * [0x1| 0| 0| 0] USB_OTG
407 * [0x1| 1| 0| 0] USB_OTG_VB
408 * [0x1| 0| 1| 0] Audio Video cable with load
409 * [0x1| 0| 1| 1] MHL without charging cable
410 * [0x1| 1| 1| 1] MHL with charging cable
411 */
412 cable_type = ((0x1 << 8)
413 | (vbvolt << 2)
414 | (adclow << 1)
415 | adc1k);
416
417 info->prev_cable_type = adc;
418 info->prev_cable_type_gnd = cable_type;
419 }
420
421 break;
422 case MAX77693_CABLE_GROUP_CHG:
423 /*
424 * Read charger type to check cable type and decide cable state
425 * according to type of charger cable.
426 */
427 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
428 chg_type >>= STATUS2_CHGTYP_SHIFT;
429
430 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
431 *attached = false;
432
433 cable_type = info->prev_chg_type;
434 info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
435 } else {
436 *attached = true;
437
438 /*
439 * Check current cable state/cable type and store cable
440 * type(info->prev_chg_type) for handling cable when
441 * charger cable is detached.
442 */
443 cable_type = info->prev_chg_type = chg_type;
444 }
445
446 break;
447 case MAX77693_CABLE_GROUP_VBVOLT:
448 /*
449 * Read ADC value to check cable type and decide cable state
450 * according to cable type
451 */
452 adc = info->status[0] & STATUS1_ADC_MASK;
453 adc >>= STATUS1_ADC_SHIFT;
454 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
455 chg_type >>= STATUS2_CHGTYP_SHIFT;
456
457 if (adc == MAX77693_MUIC_ADC_OPEN
458 && chg_type == MAX77693_CHARGER_TYPE_NONE)
459 *attached = false;
460 else
461 *attached = true;
462
463 /*
464 * Read vbvolt field, if vbvolt is 1,
465 * this cable is used for charging.
466 */
467 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
468 vbvolt >>= STATUS2_VBVOLT_SHIFT;
469
470 cable_type = vbvolt;
471 break;
472 default:
473 dev_err(info->dev, "Unknown cable group (%d)\n", group);
474 cable_type = -EINVAL;
475 break;
476 }
477
478 return cable_type;
479 }
480
481 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
482 int cable_type, bool attached)
483 {
484 int ret = 0;
485 int vbvolt;
486 bool cable_attached;
487 char dock_name[CABLE_NAME_MAX];
488
489 dev_info(info->dev,
490 "external connector is %s (adc:0x%02x)\n",
491 attached ? "attached" : "detached", cable_type);
492
493 switch (cable_type) {
494 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
495 /*
496 * Check power cable whether attached or detached state.
497 * The Dock-Smart device need surely external power supply.
498 * If power cable(USB/TA) isn't connected to Dock device,
499 * user can't use Dock-Smart for desktop mode.
500 */
501 vbvolt = max77693_muic_get_cable_type(info,
502 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
503 if (attached && !vbvolt) {
504 dev_warn(info->dev,
505 "Cannot detect external power supply\n");
506 return 0;
507 }
508
509 /*
510 * Notify Dock-Smart/MHL state.
511 * - Dock-Smart device include three type of cable which
512 * are HDMI, USB for mouse/keyboard and micro-usb port
513 * for USB/TA cable. Dock-Smart device need always exteranl
514 * power supply(USB/TA cable through micro-usb cable). Dock-
515 * Smart device support screen output of target to separate
516 * monitor and mouse/keyboard for desktop mode.
517 *
518 * Features of 'USB/TA cable with Dock-Smart device'
519 * - Support MHL
520 * - Support external output feature of audio
521 * - Support charging through micro-usb port without data
522 * connection if TA cable is connected to target.
523 * - Support charging and data connection through micro-usb port
524 * if USB cable is connected between target and host
525 * device.
526 * - Support OTG device (Mouse/Keyboard)
527 */
528 ret = max77693_muic_set_path(info, info->path_usb, attached);
529 if (ret < 0)
530 return ret;
531
532 extcon_set_cable_state(info->edev, "Dock-Smart", attached);
533 extcon_set_cable_state(info->edev, "MHL", attached);
534 goto out;
535 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* Dock-Car */
536 strcpy(dock_name, "Dock-Car");
537 break;
538 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
539 strcpy(dock_name, "Dock-Desk");
540 break;
541 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
542 strcpy(dock_name, "Dock-Audio");
543 if (!attached)
544 extcon_set_cable_state(info->edev, "USB", false);
545 break;
546 default:
547 dev_err(info->dev, "failed to detect %s dock device\n",
548 attached ? "attached" : "detached");
549 return -EINVAL;
550 }
551
552 /* Dock-Car/Desk/Audio, PATH:AUDIO */
553 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
554 if (ret < 0)
555 return ret;
556 extcon_set_cable_state(info->edev, dock_name, attached);
557
558 out:
559 return 0;
560 }
561
562 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
563 int button_type, bool attached)
564 {
565 struct input_dev *dock = info->dock;
566 unsigned int code;
567
568 switch (button_type) {
569 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
570 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
571 /* DOCK_KEY_PREV */
572 code = KEY_PREVIOUSSONG;
573 break;
574 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
575 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
576 /* DOCK_KEY_NEXT */
577 code = KEY_NEXTSONG;
578 break;
579 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
580 /* DOCK_VOL_DOWN */
581 code = KEY_VOLUMEDOWN;
582 break;
583 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
584 /* DOCK_VOL_UP */
585 code = KEY_VOLUMEUP;
586 break;
587 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
588 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
589 /* DOCK_KEY_PLAY_PAUSE */
590 code = KEY_PLAYPAUSE;
591 break;
592 default:
593 dev_err(info->dev,
594 "failed to detect %s key (adc:0x%x)\n",
595 attached ? "pressed" : "released", button_type);
596 return -EINVAL;
597 }
598
599 input_event(dock, EV_KEY, code, attached);
600 input_sync(dock);
601
602 return 0;
603 }
604
605 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
606 {
607 int cable_type_gnd;
608 int ret = 0;
609 bool attached;
610
611 cable_type_gnd = max77693_muic_get_cable_type(info,
612 MAX77693_CABLE_GROUP_ADC_GND, &attached);
613
614 switch (cable_type_gnd) {
615 case MAX77693_MUIC_GND_USB_OTG:
616 case MAX77693_MUIC_GND_USB_OTG_VB:
617 /* USB_OTG, PATH: AP_USB */
618 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
619 if (ret < 0)
620 return ret;
621 extcon_set_cable_state(info->edev, "USB-Host", attached);
622 break;
623 case MAX77693_MUIC_GND_AV_CABLE_LOAD:
624 /* Audio Video Cable with load, PATH:AUDIO */
625 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
626 if (ret < 0)
627 return ret;
628 extcon_set_cable_state(info->edev,
629 "Audio-video-load", attached);
630 break;
631 case MAX77693_MUIC_GND_MHL:
632 case MAX77693_MUIC_GND_MHL_VB:
633 /* MHL or MHL with USB/TA cable */
634 extcon_set_cable_state(info->edev, "MHL", attached);
635 break;
636 default:
637 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
638 attached ? "attached" : "detached");
639 return -EINVAL;
640 }
641
642 return 0;
643 }
644
645 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
646 int cable_type, bool attached)
647 {
648 char cable_name[32];
649 int ret = 0;
650 u8 path = CONTROL1_SW_OPEN;
651
652 dev_info(info->dev,
653 "external connector is %s (adc:0x%02x)\n",
654 attached ? "attached" : "detached", cable_type);
655
656 switch (cable_type) {
657 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */
658 /* PATH:AP_USB */
659 strcpy(cable_name, "JIG-USB-OFF");
660 path = CONTROL1_SW_USB;
661 break;
662 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
663 /* PATH:AP_USB */
664 strcpy(cable_name, "JIG-USB-ON");
665 path = CONTROL1_SW_USB;
666 break;
667 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
668 /* PATH:AP_UART */
669 strcpy(cable_name, "JIG-UART-OFF");
670 path = CONTROL1_SW_UART;
671 break;
672 default:
673 dev_err(info->dev, "failed to detect %s jig cable\n",
674 attached ? "attached" : "detached");
675 return -EINVAL;
676 }
677
678 ret = max77693_muic_set_path(info, path, attached);
679 if (ret < 0)
680 return ret;
681
682 extcon_set_cable_state(info->edev, cable_name, attached);
683
684 return 0;
685 }
686
687 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
688 {
689 int cable_type;
690 int button_type;
691 bool attached;
692 int ret = 0;
693
694 /* Check accessory state which is either detached or attached */
695 cable_type = max77693_muic_get_cable_type(info,
696 MAX77693_CABLE_GROUP_ADC, &attached);
697
698 dev_info(info->dev,
699 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
700 attached ? "attached" : "detached", cable_type,
701 info->prev_cable_type);
702
703 switch (cable_type) {
704 case MAX77693_MUIC_ADC_GROUND:
705 /* USB_OTG/MHL/Audio */
706 max77693_muic_adc_ground_handler(info);
707 break;
708 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
709 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
710 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
711 /* JIG */
712 ret = max77693_muic_jig_handler(info, cable_type, attached);
713 if (ret < 0)
714 return ret;
715 break;
716 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
717 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* Dock-Car */
718 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
719 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
720 /*
721 * DOCK device
722 *
723 * The MAX77693 MUIC device can detect total 34 cable type
724 * except of charger cable and MUIC device didn't define
725 * specfic role of cable in the range of from 0x01 to 0x12
726 * of ADC value. So, can use/define cable with no role according
727 * to schema of hardware board.
728 */
729 ret = max77693_muic_dock_handler(info, cable_type, attached);
730 if (ret < 0)
731 return ret;
732 break;
733 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */
734 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */
735 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */
736 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */
737 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */
738 /*
739 * Button of DOCK device
740 * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
741 *
742 * The MAX77693 MUIC device can detect total 34 cable type
743 * except of charger cable and MUIC device didn't define
744 * specfic role of cable in the range of from 0x01 to 0x12
745 * of ADC value. So, can use/define cable with no role according
746 * to schema of hardware board.
747 */
748 if (attached)
749 button_type = info->prev_button_type = cable_type;
750 else
751 button_type = info->prev_button_type;
752
753 ret = max77693_muic_dock_button_handler(info, button_type,
754 attached);
755 if (ret < 0)
756 return ret;
757 break;
758 case MAX77693_MUIC_ADC_SEND_END_BUTTON:
759 case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
760 case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
761 case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
762 case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
763 case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
764 case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
765 case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
766 case MAX77693_MUIC_ADC_RESERVED_ACC_1:
767 case MAX77693_MUIC_ADC_RESERVED_ACC_2:
768 case MAX77693_MUIC_ADC_RESERVED_ACC_4:
769 case MAX77693_MUIC_ADC_RESERVED_ACC_5:
770 case MAX77693_MUIC_ADC_CEA936_AUDIO:
771 case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
772 case MAX77693_MUIC_ADC_TTY_CONVERTER:
773 case MAX77693_MUIC_ADC_UART_CABLE:
774 case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
775 case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
776 /*
777 * This accessory isn't used in general case if it is specially
778 * needed to detect additional accessory, should implement
779 * proper operation when this accessory is attached/detached.
780 */
781 dev_info(info->dev,
782 "accessory is %s but it isn't used (adc:0x%x)\n",
783 attached ? "attached" : "detached", cable_type);
784 return -EAGAIN;
785 default:
786 dev_err(info->dev,
787 "failed to detect %s accessory (adc:0x%x)\n",
788 attached ? "attached" : "detached", cable_type);
789 return -EINVAL;
790 }
791
792 return 0;
793 }
794
795 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
796 {
797 int chg_type;
798 int cable_type_gnd;
799 int cable_type;
800 bool attached;
801 bool cable_attached;
802 int ret = 0;
803
804 chg_type = max77693_muic_get_cable_type(info,
805 MAX77693_CABLE_GROUP_CHG, &attached);
806
807 dev_info(info->dev,
808 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
809 attached ? "attached" : "detached",
810 chg_type, info->prev_chg_type);
811
812 switch (chg_type) {
813 case MAX77693_CHARGER_TYPE_USB:
814 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
815 case MAX77693_CHARGER_TYPE_NONE:
816 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
817 cable_type_gnd = max77693_muic_get_cable_type(info,
818 MAX77693_CABLE_GROUP_ADC_GND,
819 &cable_attached);
820 switch (cable_type_gnd) {
821 case MAX77693_MUIC_GND_MHL:
822 case MAX77693_MUIC_GND_MHL_VB:
823 /*
824 * MHL cable with MHL_TA(USB/TA) cable
825 * - MHL cable include two port(HDMI line and separate
826 * micro-usb port. When the target connect MHL cable,
827 * extcon driver check whether MHL_TA(USB/TA) cable is
828 * connected. If MHL_TA cable is connected, extcon
829 * driver notify state to notifiee for charging battery.
830 *
831 * Features of 'MHL_TA(USB/TA) with MHL cable'
832 * - Support MHL
833 * - Support charging through micro-usb port without
834 * data connection
835 */
836 extcon_set_cable_state(info->edev, "MHL_TA", attached);
837 if (!cable_attached)
838 extcon_set_cable_state(info->edev,
839 "MHL", cable_attached);
840 break;
841 }
842
843 /* Check MAX77693_CABLE_GROUP_ADC type */
844 cable_type = max77693_muic_get_cable_type(info,
845 MAX77693_CABLE_GROUP_ADC,
846 &cable_attached);
847 switch (cable_type) {
848 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
849 /*
850 * Dock-Audio device with USB/TA cable
851 * - Dock device include two port(Dock-Audio and micro-
852 * usb port). When the target connect Dock-Audio device,
853 * extcon driver check whether USB/TA cable is connected
854 * or not. If USB/TA cable is connected, extcon driver
855 * notify state to notifiee for charging battery.
856 *
857 * Features of 'USB/TA cable with Dock-Audio device'
858 * - Support external output feature of audio.
859 * - Support charging through micro-usb port without
860 * data connection.
861 */
862 extcon_set_cable_state(info->edev, "USB", attached);
863
864 if (!cable_attached)
865 extcon_set_cable_state(info->edev, "Dock-Audio",
866 cable_attached);
867 break;
868 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
869 /*
870 * Dock-Smart device with USB/TA cable
871 * - Dock-Desk device include three type of cable which
872 * are HDMI, USB for mouse/keyboard and micro-usb port
873 * for USB/TA cable. Dock-Smart device need always
874 * exteranl power supply(USB/TA cable through micro-usb
875 * cable). Dock-Smart device support screen output of
876 * target to separate monitor and mouse/keyboard for
877 * desktop mode.
878 *
879 * Features of 'USB/TA cable with Dock-Smart device'
880 * - Support MHL
881 * - Support external output feature of audio
882 * - Support charging through micro-usb port without
883 * data connection if TA cable is connected to target.
884 * - Support charging and data connection through micro-
885 * usb port if USB cable is connected between target
886 * and host device
887 * - Support OTG device (Mouse/Keyboard)
888 */
889 ret = max77693_muic_set_path(info, info->path_usb,
890 attached);
891 if (ret < 0)
892 return ret;
893
894 extcon_set_cable_state(info->edev, "Dock-Smart",
895 attached);
896 extcon_set_cable_state(info->edev, "MHL", attached);
897
898 break;
899 }
900
901 /* Check MAX77693_CABLE_GROUP_CHG type */
902 switch (chg_type) {
903 case MAX77693_CHARGER_TYPE_NONE:
904 /*
905 * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
906 * cable is attached, muic device happen below two irq.
907 * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
908 * MHL/Dock-Audio.
909 * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
910 * USB/TA cable connected to MHL or Dock-Audio.
911 * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
912 * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
913 *
914 * If user attach MHL (with USB/TA cable and immediately
915 * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
916 * _INT2_CHGTYP irq is happened, USB/TA cable remain
917 * connected state to target. But USB/TA cable isn't
918 * connected to target. The user be face with unusual
919 * action. So, driver should check this situation in
920 * spite of, that previous charger type is N/A.
921 */
922 break;
923 case MAX77693_CHARGER_TYPE_USB:
924 /* Only USB cable, PATH:AP_USB */
925 ret = max77693_muic_set_path(info, info->path_usb,
926 attached);
927 if (ret < 0)
928 return ret;
929
930 extcon_set_cable_state(info->edev, "USB", attached);
931 break;
932 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
933 /* Only TA cable */
934 extcon_set_cable_state(info->edev, "TA", attached);
935 break;
936 }
937 break;
938 case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
939 extcon_set_cable_state(info->edev,
940 "Charge-downstream", attached);
941 break;
942 case MAX77693_CHARGER_TYPE_APPLE_500MA:
943 extcon_set_cable_state(info->edev, "Slow-charger", attached);
944 break;
945 case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
946 extcon_set_cable_state(info->edev, "Fast-charger", attached);
947 break;
948 case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
949 break;
950 default:
951 dev_err(info->dev,
952 "failed to detect %s accessory (chg_type:0x%x)\n",
953 attached ? "attached" : "detached", chg_type);
954 return -EINVAL;
955 }
956
957 return 0;
958 }
959
960 static void max77693_muic_irq_work(struct work_struct *work)
961 {
962 struct max77693_muic_info *info = container_of(work,
963 struct max77693_muic_info, irq_work);
964 int irq_type = -1;
965 int i, ret = 0;
966
967 if (!info->edev)
968 return;
969
970 mutex_lock(&info->mutex);
971
972 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
973 if (info->irq == muic_irqs[i].virq)
974 irq_type = muic_irqs[i].irq;
975
976 ret = regmap_bulk_read(info->max77693->regmap_muic,
977 MAX77693_MUIC_REG_STATUS1, info->status, 2);
978 if (ret) {
979 dev_err(info->dev, "failed to read MUIC register\n");
980 mutex_unlock(&info->mutex);
981 return;
982 }
983
984 switch (irq_type) {
985 case MAX77693_MUIC_IRQ_INT1_ADC:
986 case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
987 case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
988 case MAX77693_MUIC_IRQ_INT1_ADC1K:
989 /* Handle all of accessory except for
990 type of charger accessory */
991 ret = max77693_muic_adc_handler(info);
992 break;
993 case MAX77693_MUIC_IRQ_INT2_CHGTYP:
994 case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
995 case MAX77693_MUIC_IRQ_INT2_DCDTMR:
996 case MAX77693_MUIC_IRQ_INT2_DXOVP:
997 case MAX77693_MUIC_IRQ_INT2_VBVOLT:
998 case MAX77693_MUIC_IRQ_INT2_VIDRM:
999 /* Handle charger accessory */
1000 ret = max77693_muic_chg_handler(info);
1001 break;
1002 case MAX77693_MUIC_IRQ_INT3_EOC:
1003 case MAX77693_MUIC_IRQ_INT3_CGMBC:
1004 case MAX77693_MUIC_IRQ_INT3_OVP:
1005 case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
1006 case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
1007 case MAX77693_MUIC_IRQ_INT3_BAT_DET:
1008 break;
1009 default:
1010 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
1011 irq_type);
1012 mutex_unlock(&info->mutex);
1013 return;
1014 }
1015
1016 if (ret < 0)
1017 dev_err(info->dev, "failed to handle MUIC interrupt\n");
1018
1019 mutex_unlock(&info->mutex);
1020
1021 return;
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 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,"
1173 " error :%d)\n",
1174 muic_irq->irq, ret);
1175 return ret;
1176 }
1177 }
1178
1179 /* Initialize extcon device */
1180 info->edev = devm_extcon_dev_allocate(&pdev->dev,
1181 max77693_extcon_cable);
1182 if (IS_ERR(info->edev)) {
1183 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1184 return -ENOMEM;
1185 }
1186 info->edev->name = DEV_NAME;
1187
1188 ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1189 if (ret) {
1190 dev_err(&pdev->dev, "failed to register extcon device\n");
1191 return ret;
1192 }
1193
1194 /* Initialize MUIC register by using platform data or default data */
1195 if (pdata && pdata->muic_data) {
1196 init_data = pdata->muic_data->init_data;
1197 num_init_data = pdata->muic_data->num_init_data;
1198 } else {
1199 init_data = default_init_data;
1200 num_init_data = ARRAY_SIZE(default_init_data);
1201 }
1202
1203 for (i = 0; i < num_init_data; i++) {
1204 enum max77693_irq_source irq_src
1205 = MAX77693_IRQ_GROUP_NR;
1206
1207 regmap_write(info->max77693->regmap_muic,
1208 init_data[i].addr,
1209 init_data[i].data);
1210
1211 switch (init_data[i].addr) {
1212 case MAX77693_MUIC_REG_INTMASK1:
1213 irq_src = MUIC_INT1;
1214 break;
1215 case MAX77693_MUIC_REG_INTMASK2:
1216 irq_src = MUIC_INT2;
1217 break;
1218 case MAX77693_MUIC_REG_INTMASK3:
1219 irq_src = MUIC_INT3;
1220 break;
1221 }
1222
1223 if (irq_src < MAX77693_IRQ_GROUP_NR)
1224 info->max77693->irq_masks_cur[irq_src]
1225 = init_data[i].data;
1226 }
1227
1228 if (pdata && pdata->muic_data) {
1229 struct max77693_muic_platform_data *muic_pdata
1230 = pdata->muic_data;
1231
1232 /*
1233 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1234 * h/w path of COMP2/COMN1 on CONTROL1 register.
1235 */
1236 if (muic_pdata->path_uart)
1237 info->path_uart = muic_pdata->path_uart;
1238 else
1239 info->path_uart = CONTROL1_SW_UART;
1240
1241 if (muic_pdata->path_usb)
1242 info->path_usb = muic_pdata->path_usb;
1243 else
1244 info->path_usb = CONTROL1_SW_USB;
1245
1246 /*
1247 * Default delay time for detecting cable state
1248 * after certain time.
1249 */
1250 if (muic_pdata->detcable_delay_ms)
1251 delay_jiffies =
1252 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1253 else
1254 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1255 } else {
1256 info->path_usb = CONTROL1_SW_USB;
1257 info->path_uart = CONTROL1_SW_UART;
1258 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1259 }
1260
1261 /* Set initial path for UART */
1262 max77693_muic_set_path(info, info->path_uart, true);
1263
1264 /* Check revision number of MUIC device*/
1265 ret = regmap_read(info->max77693->regmap_muic,
1266 MAX77693_MUIC_REG_ID, &id);
1267 if (ret < 0) {
1268 dev_err(&pdev->dev, "failed to read revision number\n");
1269 return ret;
1270 }
1271 dev_info(info->dev, "device ID : 0x%x\n", id);
1272
1273 /* Set ADC debounce time */
1274 max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1275
1276 /*
1277 * Detect accessory after completing the initialization of platform
1278 *
1279 * - Use delayed workqueue to detect cable state and then
1280 * notify cable state to notifiee/platform through uevent.
1281 * After completing the booting of platform, the extcon provider
1282 * driver should notify cable state to upper layer.
1283 */
1284 INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1285 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1286 delay_jiffies);
1287
1288 return ret;
1289 }
1290
1291 static int max77693_muic_remove(struct platform_device *pdev)
1292 {
1293 struct max77693_muic_info *info = platform_get_drvdata(pdev);
1294
1295 cancel_work_sync(&info->irq_work);
1296 input_unregister_device(info->dock);
1297
1298 return 0;
1299 }
1300
1301 static struct platform_driver max77693_muic_driver = {
1302 .driver = {
1303 .name = DEV_NAME,
1304 .owner = THIS_MODULE,
1305 },
1306 .probe = max77693_muic_probe,
1307 .remove = max77693_muic_remove,
1308 };
1309
1310 module_platform_driver(max77693_muic_driver);
1311
1312 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1313 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1314 MODULE_LICENSE("GPL");
1315 MODULE_ALIAS("platform:extcon-max77693");
Linux with added FPC-III support