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Donggeun Kim99f09be2011-11-24 18:12:18 +09001/*
Chanwoo Choib76668b2012-05-09 12:31:58 +09002 * extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC
Donggeun Kim99f09be2011-11-24 18:12:18 +09003 *
Sachin Kamat2ca36f42012-11-20 15:46:33 +09004 * Copyright (C) 2012 Samsung Electronics
Donggeun Kim99f09be2011-11-24 18:12:18 +09005 * Donggeun Kim <dg77.kim@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.
Donggeun Kim99f09be2011-11-24 18:12:18 +090016 */
17
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/i2c.h>
21#include <linux/slab.h>
22#include <linux/interrupt.h>
23#include <linux/err.h>
24#include <linux/platform_device.h>
25#include <linux/kobject.h>
26#include <linux/mfd/max8997.h>
27#include <linux/mfd/max8997-private.h>
Chanwoo Choib76668b2012-05-09 12:31:58 +090028#include <linux/extcon.h>
Chanwoo Choidca1a712012-07-02 09:03:00 +090029#include <linux/irqdomain.h>
Chanwoo Choib76668b2012-05-09 12:31:58 +090030
31#define DEV_NAME "max8997-muic"
Chanwoo Choiaf5eb1a2013-02-13 15:10:00 +090032#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
Donggeun Kim99f09be2011-11-24 18:12:18 +090033
Chanwoo Choi027fcd52013-02-13 08:50:00 +090034enum max8997_muic_adc_debounce_time {
35 ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */
36 ADC_DEBOUNCE_TIME_10MS, /* 10ms */
37 ADC_DEBOUNCE_TIME_25MS, /* 25ms */
38 ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */
39};
40
Donggeun Kim99f09be2011-11-24 18:12:18 +090041struct max8997_muic_irq {
42 unsigned int irq;
43 const char *name;
Chanwoo Choidca1a712012-07-02 09:03:00 +090044 unsigned int virq;
Donggeun Kim99f09be2011-11-24 18:12:18 +090045};
46
47static struct max8997_muic_irq muic_irqs[] = {
Chanwoo Choif73f6232013-02-13 12:05:42 +090048 { MAX8997_MUICIRQ_ADCError, "muic-ADCERROR" },
49 { MAX8997_MUICIRQ_ADCLow, "muic-ADCLOW" },
50 { MAX8997_MUICIRQ_ADC, "muic-ADC" },
51 { MAX8997_MUICIRQ_VBVolt, "muic-VBVOLT" },
52 { MAX8997_MUICIRQ_DBChg, "muic-DBCHG" },
53 { MAX8997_MUICIRQ_DCDTmr, "muic-DCDTMR" },
54 { MAX8997_MUICIRQ_ChgDetRun, "muic-CHGDETRUN" },
55 { MAX8997_MUICIRQ_ChgTyp, "muic-CHGTYP" },
56 { MAX8997_MUICIRQ_OVP, "muic-OVP" },
57};
58
59/* Define supported cable type */
60enum max8997_muic_acc_type {
61 MAX8997_MUIC_ADC_GROUND = 0x0,
62 MAX8997_MUIC_ADC_MHL, /* MHL*/
63 MAX8997_MUIC_ADC_REMOTE_S1_BUTTON,
64 MAX8997_MUIC_ADC_REMOTE_S2_BUTTON,
65 MAX8997_MUIC_ADC_REMOTE_S3_BUTTON,
66 MAX8997_MUIC_ADC_REMOTE_S4_BUTTON,
67 MAX8997_MUIC_ADC_REMOTE_S5_BUTTON,
68 MAX8997_MUIC_ADC_REMOTE_S6_BUTTON,
69 MAX8997_MUIC_ADC_REMOTE_S7_BUTTON,
70 MAX8997_MUIC_ADC_REMOTE_S8_BUTTON,
71 MAX8997_MUIC_ADC_REMOTE_S9_BUTTON,
72 MAX8997_MUIC_ADC_REMOTE_S10_BUTTON,
73 MAX8997_MUIC_ADC_REMOTE_S11_BUTTON,
74 MAX8997_MUIC_ADC_REMOTE_S12_BUTTON,
75 MAX8997_MUIC_ADC_RESERVED_ACC_1,
76 MAX8997_MUIC_ADC_RESERVED_ACC_2,
77 MAX8997_MUIC_ADC_RESERVED_ACC_3,
78 MAX8997_MUIC_ADC_RESERVED_ACC_4,
79 MAX8997_MUIC_ADC_RESERVED_ACC_5,
80 MAX8997_MUIC_ADC_CEA936_AUDIO,
81 MAX8997_MUIC_ADC_PHONE_POWERED_DEV,
82 MAX8997_MUIC_ADC_TTY_CONVERTER,
83 MAX8997_MUIC_ADC_UART_CABLE,
84 MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG,
85 MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF, /* JIG-USB-OFF */
86 MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON, /* JIG-USB-ON */
87 MAX8997_MUIC_ADC_AV_CABLE_NOLOAD, /* DESKDOCK */
88 MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG,
89 MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF, /* JIG-UART */
90 MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON, /* CARDOCK */
91 MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE,
92 MAX8997_MUIC_ADC_OPEN, /* OPEN */
93};
94
95enum max8997_muic_cable_group {
96 MAX8997_CABLE_GROUP_ADC = 0,
97 MAX8997_CABLE_GROUP_ADC_GND,
98 MAX8997_CABLE_GROUP_CHG,
99 MAX8997_CABLE_GROUP_VBVOLT,
100};
101
102enum max8997_muic_usb_type {
103 MAX8997_USB_HOST,
104 MAX8997_USB_DEVICE,
105};
106
107enum max8997_muic_charger_type {
108 MAX8997_CHARGER_TYPE_NONE = 0,
109 MAX8997_CHARGER_TYPE_USB,
110 MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT,
111 MAX8997_CHARGER_TYPE_DEDICATED_CHG,
112 MAX8997_CHARGER_TYPE_500MA,
113 MAX8997_CHARGER_TYPE_1A,
114 MAX8997_CHARGER_TYPE_DEAD_BATTERY = 7,
Donggeun Kim99f09be2011-11-24 18:12:18 +0900115};
116
117struct max8997_muic_info {
118 struct device *dev;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900119 struct i2c_client *muic;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900120 struct extcon_dev *edev;
121 int prev_cable_type;
122 int prev_chg_type;
123 u8 status[2];
Donggeun Kim99f09be2011-11-24 18:12:18 +0900124
125 int irq;
126 struct work_struct irq_work;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900127 struct mutex mutex;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900128
Chanwoo Choif73f6232013-02-13 12:05:42 +0900129 struct max8997_muic_platform_data *muic_pdata;
130 enum max8997_muic_charger_type pre_charger_type;
Chanwoo Choi685dc9a2013-02-13 15:04:15 +0900131
132 /*
Chanwoo Choiaf5eb1a2013-02-13 15:10:00 +0900133 * Use delayed workqueue to detect cable state and then
134 * notify cable state to notifiee/platform through uevent.
135 * After completing the booting of platform, the extcon provider
136 * driver should notify cable state to upper layer.
137 */
138 struct delayed_work wq_detcable;
139
140 /*
Chanwoo Choi685dc9a2013-02-13 15:04:15 +0900141 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
142 * h/w path of COMP2/COMN1 on CONTROL1 register.
143 */
144 int path_usb;
145 int path_uart;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900146};
147
Chanwoo Choi73b6ecd2015-06-12 11:10:06 +0900148static const unsigned int max8997_extcon_cable[] = {
Chanwoo Choi2a9de9c2015-04-24 19:16:05 +0900149 EXTCON_USB,
150 EXTCON_USB_HOST,
151 EXTCON_TA,
152 EXTCON_FAST_CHARGER,
153 EXTCON_SLOW_CHARGER,
154 EXTCON_CHARGE_DOWNSTREAM,
155 EXTCON_MHL,
156 EXTCON_DOCK,
157 EXTCON_JIG,
158 EXTCON_NONE,
Donggeun Kim99f09be2011-11-24 18:12:18 +0900159};
160
Chanwoo Choi07c70502013-02-13 08:42:37 +0900161/*
Chanwoo Choi027fcd52013-02-13 08:50:00 +0900162 * max8997_muic_set_debounce_time - Set the debounce time of ADC
163 * @info: the instance including private data of max8997 MUIC
164 * @time: the debounce time of ADC
165 */
166static int max8997_muic_set_debounce_time(struct max8997_muic_info *info,
167 enum max8997_muic_adc_debounce_time time)
168{
169 int ret;
170
171 switch (time) {
172 case ADC_DEBOUNCE_TIME_0_5MS:
173 case ADC_DEBOUNCE_TIME_10MS:
174 case ADC_DEBOUNCE_TIME_25MS:
175 case ADC_DEBOUNCE_TIME_38_62MS:
176 ret = max8997_update_reg(info->muic,
177 MAX8997_MUIC_REG_CONTROL3,
178 time << CONTROL3_ADCDBSET_SHIFT,
179 CONTROL3_ADCDBSET_MASK);
180 if (ret) {
181 dev_err(info->dev, "failed to set ADC debounce time\n");
Sachin Kamat3ad9e862013-04-08 09:13:18 +0900182 return ret;
Chanwoo Choi027fcd52013-02-13 08:50:00 +0900183 }
184 break;
185 default:
186 dev_err(info->dev, "invalid ADC debounce time\n");
187 return -EINVAL;
188 }
189
190 return 0;
191};
192
193/*
Chanwoo Choi07c70502013-02-13 08:42:37 +0900194 * max8997_muic_set_path - Set hardware line according to attached cable
195 * @info: the instance including private data of max8997 MUIC
196 * @value: the path according to attached cable
197 * @attached: the state of cable (true:attached, false:detached)
198 *
199 * The max8997 MUIC device share outside H/W line among a varity of cables,
200 * so this function set internal path of H/W line according to the type of
201 * attached cable.
202 */
203static int max8997_muic_set_path(struct max8997_muic_info *info,
204 u8 val, bool attached)
205{
206 int ret = 0;
207 u8 ctrl1, ctrl2 = 0;
208
209 if (attached)
210 ctrl1 = val;
211 else
212 ctrl1 = CONTROL1_SW_OPEN;
213
214 ret = max8997_update_reg(info->muic,
215 MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK);
216 if (ret < 0) {
217 dev_err(info->dev, "failed to update MUIC register\n");
Sachin Kamat3ad9e862013-04-08 09:13:18 +0900218 return ret;
Chanwoo Choi07c70502013-02-13 08:42:37 +0900219 }
220
221 if (attached)
222 ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
223 else
224 ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
225
226 ret = max8997_update_reg(info->muic,
227 MAX8997_MUIC_REG_CONTROL2, ctrl2,
228 CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
229 if (ret < 0) {
230 dev_err(info->dev, "failed to update MUIC register\n");
Sachin Kamat3ad9e862013-04-08 09:13:18 +0900231 return ret;
Chanwoo Choi07c70502013-02-13 08:42:37 +0900232 }
233
234 dev_info(info->dev,
235 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
236 ctrl1, ctrl2, attached ? "attached" : "detached");
237
238 return 0;
239}
240
Chanwoo Choif73f6232013-02-13 12:05:42 +0900241/*
242 * max8997_muic_get_cable_type - Return cable type and check cable state
243 * @info: the instance including private data of max8997 MUIC
244 * @group: the path according to attached cable
245 * @attached: store cable state and return
246 *
247 * This function check the cable state either attached or detached,
248 * and then divide precise type of cable according to cable group.
249 * - MAX8997_CABLE_GROUP_ADC
250 * - MAX8997_CABLE_GROUP_CHG
251 */
252static int max8997_muic_get_cable_type(struct max8997_muic_info *info,
253 enum max8997_muic_cable_group group, bool *attached)
254{
255 int cable_type = 0;
256 int adc;
257 int chg_type;
258
259 switch (group) {
260 case MAX8997_CABLE_GROUP_ADC:
261 /*
262 * Read ADC value to check cable type and decide cable state
263 * according to cable type
264 */
265 adc = info->status[0] & STATUS1_ADC_MASK;
266 adc >>= STATUS1_ADC_SHIFT;
267
268 /*
269 * Check current cable state/cable type and store cable type
270 * (info->prev_cable_type) for handling cable when cable is
271 * detached.
272 */
273 if (adc == MAX8997_MUIC_ADC_OPEN) {
274 *attached = false;
275
276 cable_type = info->prev_cable_type;
277 info->prev_cable_type = MAX8997_MUIC_ADC_OPEN;
278 } else {
279 *attached = true;
280
281 cable_type = info->prev_cable_type = adc;
282 }
283 break;
284 case MAX8997_CABLE_GROUP_CHG:
285 /*
286 * Read charger type to check cable type and decide cable state
287 * according to type of charger cable.
288 */
289 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
290 chg_type >>= STATUS2_CHGTYP_SHIFT;
291
292 if (chg_type == MAX8997_CHARGER_TYPE_NONE) {
293 *attached = false;
294
295 cable_type = info->prev_chg_type;
296 info->prev_chg_type = MAX8997_CHARGER_TYPE_NONE;
297 } else {
298 *attached = true;
299
300 /*
301 * Check current cable state/cable type and store cable
302 * type(info->prev_chg_type) for handling cable when
303 * charger cable is detached.
304 */
305 cable_type = info->prev_chg_type = chg_type;
306 }
307
308 break;
309 default:
310 dev_err(info->dev, "Unknown cable group (%d)\n", group);
311 cable_type = -EINVAL;
312 break;
313 }
314
315 return cable_type;
316}
317
Donggeun Kim99f09be2011-11-24 18:12:18 +0900318static int max8997_muic_handle_usb(struct max8997_muic_info *info,
319 enum max8997_muic_usb_type usb_type, bool attached)
320{
Donggeun Kim99f09be2011-11-24 18:12:18 +0900321 int ret = 0;
322
323 if (usb_type == MAX8997_USB_HOST) {
Chanwoo Choi685dc9a2013-02-13 15:04:15 +0900324 ret = max8997_muic_set_path(info, info->path_usb, attached);
Chanwoo Choif73f6232013-02-13 12:05:42 +0900325 if (ret < 0) {
Donggeun Kim99f09be2011-11-24 18:12:18 +0900326 dev_err(info->dev, "failed to update muic register\n");
Chanwoo Choif73f6232013-02-13 12:05:42 +0900327 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900328 }
329 }
330
Chanwoo Choib76668b2012-05-09 12:31:58 +0900331 switch (usb_type) {
332 case MAX8997_USB_HOST:
Chanwoo Choi2a9de9c2015-04-24 19:16:05 +0900333 extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, attached);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900334 break;
335 case MAX8997_USB_DEVICE:
Chanwoo Choi2a9de9c2015-04-24 19:16:05 +0900336 extcon_set_cable_state_(info->edev, EXTCON_USB, attached);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900337 break;
338 default:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900339 dev_err(info->dev, "failed to detect %s usb cable\n",
340 attached ? "attached" : "detached");
341 return -EINVAL;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900342 }
343
Chanwoo Choif73f6232013-02-13 12:05:42 +0900344 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900345}
346
Donggeun Kim99f09be2011-11-24 18:12:18 +0900347static int max8997_muic_handle_dock(struct max8997_muic_info *info,
Chanwoo Choif73f6232013-02-13 12:05:42 +0900348 int cable_type, bool attached)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900349{
Donggeun Kim99f09be2011-11-24 18:12:18 +0900350 int ret = 0;
351
Chanwoo Choi07c70502013-02-13 08:42:37 +0900352 ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900353 if (ret) {
354 dev_err(info->dev, "failed to update muic register\n");
Chanwoo Choif73f6232013-02-13 12:05:42 +0900355 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900356 }
357
Chanwoo Choif73f6232013-02-13 12:05:42 +0900358 switch (cable_type) {
359 case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900360 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
Chanwoo Choi2a9de9c2015-04-24 19:16:05 +0900361 extcon_set_cable_state_(info->edev, EXTCON_DOCK, attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900362 break;
363 default:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900364 dev_err(info->dev, "failed to detect %s dock device\n",
365 attached ? "attached" : "detached");
366 return -EINVAL;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900367 }
Chanwoo Choif73f6232013-02-13 12:05:42 +0900368
369 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900370}
371
372static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
373 bool attached)
374{
Donggeun Kim99f09be2011-11-24 18:12:18 +0900375 int ret = 0;
376
377 /* switch to UART */
Chanwoo Choi685dc9a2013-02-13 15:04:15 +0900378 ret = max8997_muic_set_path(info, info->path_uart, attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900379 if (ret) {
380 dev_err(info->dev, "failed to update muic register\n");
Sachin Kamat3ad9e862013-04-08 09:13:18 +0900381 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900382 }
383
Chanwoo Choi2a9de9c2015-04-24 19:16:05 +0900384 extcon_set_cable_state_(info->edev, EXTCON_JIG, attached);
Chanwoo Choif73f6232013-02-13 12:05:42 +0900385
386 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900387}
388
Chanwoo Choif73f6232013-02-13 12:05:42 +0900389static int max8997_muic_adc_handler(struct max8997_muic_info *info)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900390{
Chanwoo Choif73f6232013-02-13 12:05:42 +0900391 int cable_type;
392 bool attached;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900393 int ret = 0;
394
Chanwoo Choif73f6232013-02-13 12:05:42 +0900395 /* Check cable state which is either detached or attached */
396 cable_type = max8997_muic_get_cable_type(info,
397 MAX8997_CABLE_GROUP_ADC, &attached);
398
399 switch (cable_type) {
400 case MAX8997_MUIC_ADC_GROUND:
401 ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, attached);
402 if (ret < 0)
403 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900404 break;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900405 case MAX8997_MUIC_ADC_MHL:
Chanwoo Choi2a9de9c2015-04-24 19:16:05 +0900406 extcon_set_cable_state_(info->edev, EXTCON_MHL, attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900407 break;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900408 case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF:
409 case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON:
Chanwoo Choic2275d22013-08-23 10:21:37 +0900410 ret = max8997_muic_handle_usb(info,
411 MAX8997_USB_DEVICE, attached);
Chanwoo Choif73f6232013-02-13 12:05:42 +0900412 if (ret < 0)
413 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900414 break;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900415 case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
416 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
417 ret = max8997_muic_handle_dock(info, cable_type, attached);
418 if (ret < 0)
419 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900420 break;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900421 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF:
422 ret = max8997_muic_handle_jig_uart(info, attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900423 break;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900424 case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON:
425 case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON:
426 case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON:
427 case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON:
428 case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON:
429 case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON:
430 case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON:
431 case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON:
432 case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON:
433 case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON:
434 case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON:
435 case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON:
436 case MAX8997_MUIC_ADC_RESERVED_ACC_1:
437 case MAX8997_MUIC_ADC_RESERVED_ACC_2:
438 case MAX8997_MUIC_ADC_RESERVED_ACC_3:
439 case MAX8997_MUIC_ADC_RESERVED_ACC_4:
440 case MAX8997_MUIC_ADC_RESERVED_ACC_5:
441 case MAX8997_MUIC_ADC_CEA936_AUDIO:
442 case MAX8997_MUIC_ADC_PHONE_POWERED_DEV:
443 case MAX8997_MUIC_ADC_TTY_CONVERTER:
444 case MAX8997_MUIC_ADC_UART_CABLE:
445 case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG:
446 case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG:
447 case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE:
448 /*
449 * This cable isn't used in general case if it is specially
450 * needed to detect additional cable, should implement
451 * proper operation when this cable is attached/detached.
452 */
453 dev_info(info->dev,
454 "cable is %s but it isn't used (type:0x%x)\n",
455 attached ? "attached" : "detached", cable_type);
456 return -EAGAIN;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900457 default:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900458 dev_err(info->dev,
459 "failed to detect %s unknown cable (type:0x%x)\n",
460 attached ? "attached" : "detached", cable_type);
Devendra Naga3cafbd42012-08-31 14:00:19 +0530461 return -EINVAL;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900462 }
Donggeun Kim99f09be2011-11-24 18:12:18 +0900463
Devendra Naga3cafbd42012-08-31 14:00:19 +0530464 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900465}
466
Chanwoo Choif73f6232013-02-13 12:05:42 +0900467static int max8997_muic_chg_handler(struct max8997_muic_info *info)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900468{
Chanwoo Choif73f6232013-02-13 12:05:42 +0900469 int chg_type;
470 bool attached;
471 int adc;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900472
Chanwoo Choif73f6232013-02-13 12:05:42 +0900473 chg_type = max8997_muic_get_cable_type(info,
474 MAX8997_CABLE_GROUP_CHG, &attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900475
Chanwoo Choif73f6232013-02-13 12:05:42 +0900476 switch (chg_type) {
Donggeun Kim99f09be2011-11-24 18:12:18 +0900477 case MAX8997_CHARGER_TYPE_NONE:
Donggeun Kim99f09be2011-11-24 18:12:18 +0900478 break;
479 case MAX8997_CHARGER_TYPE_USB:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900480 adc = info->status[0] & STATUS1_ADC_MASK;
481 adc >>= STATUS1_ADC_SHIFT;
482
483 if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) {
Donggeun Kim99f09be2011-11-24 18:12:18 +0900484 max8997_muic_handle_usb(info,
Chanwoo Choif73f6232013-02-13 12:05:42 +0900485 MAX8997_USB_DEVICE, attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900486 }
Donggeun Kim99f09be2011-11-24 18:12:18 +0900487 break;
488 case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
Chanwoo Choi2a9de9c2015-04-24 19:16:05 +0900489 extcon_set_cable_state_(info->edev, EXTCON_CHARGE_DOWNSTREAM,
490 attached);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900491 break;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900492 case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
Chanwoo Choi2a9de9c2015-04-24 19:16:05 +0900493 extcon_set_cable_state_(info->edev, EXTCON_TA, attached);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900494 break;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900495 case MAX8997_CHARGER_TYPE_500MA:
Chanwoo Choi2a9de9c2015-04-24 19:16:05 +0900496 extcon_set_cable_state_(info->edev, EXTCON_SLOW_CHARGER,
497 attached);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900498 break;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900499 case MAX8997_CHARGER_TYPE_1A:
Chanwoo Choi2a9de9c2015-04-24 19:16:05 +0900500 extcon_set_cable_state_(info->edev, EXTCON_FAST_CHARGER,
501 attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900502 break;
503 default:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900504 dev_err(info->dev,
505 "failed to detect %s unknown chg cable (type:0x%x)\n",
506 attached ? "attached" : "detached", chg_type);
507 return -EINVAL;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900508 }
509
Chanwoo Choif73f6232013-02-13 12:05:42 +0900510 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900511}
512
513static void max8997_muic_irq_work(struct work_struct *work)
514{
515 struct max8997_muic_info *info = container_of(work,
516 struct max8997_muic_info, irq_work);
Chanwoo Choidca1a712012-07-02 09:03:00 +0900517 int irq_type = 0;
518 int i, ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900519
Chanwoo Choif73f6232013-02-13 12:05:42 +0900520 if (!info->edev)
521 return;
522
Donggeun Kim99f09be2011-11-24 18:12:18 +0900523 mutex_lock(&info->mutex);
524
Sachin Kamatad07d8b2013-08-05 14:32:03 +0530525 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
Chanwoo Choif73f6232013-02-13 12:05:42 +0900526 if (info->irq == muic_irqs[i].virq)
527 irq_type = muic_irqs[i].irq;
528
Donggeun Kim99f09be2011-11-24 18:12:18 +0900529 ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
Chanwoo Choif73f6232013-02-13 12:05:42 +0900530 2, info->status);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900531 if (ret) {
532 dev_err(info->dev, "failed to read muic register\n");
533 mutex_unlock(&info->mutex);
534 return;
535 }
536
Donggeun Kim99f09be2011-11-24 18:12:18 +0900537 switch (irq_type) {
Chanwoo Choif73f6232013-02-13 12:05:42 +0900538 case MAX8997_MUICIRQ_ADCError:
539 case MAX8997_MUICIRQ_ADCLow:
Donggeun Kim99f09be2011-11-24 18:12:18 +0900540 case MAX8997_MUICIRQ_ADC:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900541 /* Handle all of cable except for charger cable */
542 ret = max8997_muic_adc_handler(info);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900543 break;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900544 case MAX8997_MUICIRQ_VBVolt:
545 case MAX8997_MUICIRQ_DBChg:
546 case MAX8997_MUICIRQ_DCDTmr:
547 case MAX8997_MUICIRQ_ChgDetRun:
Donggeun Kim99f09be2011-11-24 18:12:18 +0900548 case MAX8997_MUICIRQ_ChgTyp:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900549 /* Handle charger cable */
550 ret = max8997_muic_chg_handler(info);
551 break;
552 case MAX8997_MUICIRQ_OVP:
Donggeun Kim99f09be2011-11-24 18:12:18 +0900553 break;
554 default:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900555 dev_info(info->dev, "misc interrupt: irq %d occurred\n",
556 irq_type);
Chanwoo Choif73f6232013-02-13 12:05:42 +0900557 mutex_unlock(&info->mutex);
558 return;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900559 }
560
Chanwoo Choif73f6232013-02-13 12:05:42 +0900561 if (ret < 0)
562 dev_err(info->dev, "failed to handle MUIC interrupt\n");
563
Donggeun Kim99f09be2011-11-24 18:12:18 +0900564 mutex_unlock(&info->mutex);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900565}
566
567static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
568{
569 struct max8997_muic_info *info = data;
570
571 dev_dbg(info->dev, "irq:%d\n", irq);
572 info->irq = irq;
573
574 schedule_work(&info->irq_work);
575
576 return IRQ_HANDLED;
577}
578
Chanwoo Choif73f6232013-02-13 12:05:42 +0900579static int max8997_muic_detect_dev(struct max8997_muic_info *info)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900580{
Chanwoo Choif73f6232013-02-13 12:05:42 +0900581 int ret = 0;
582 int adc;
583 int chg_type;
584 bool attached;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900585
Chanwoo Choif73f6232013-02-13 12:05:42 +0900586 mutex_lock(&info->mutex);
587
588 /* Read STATUSx register to detect accessory */
589 ret = max8997_bulk_read(info->muic,
590 MAX8997_MUIC_REG_STATUS1, 2, info->status);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900591 if (ret) {
Chanwoo Choif73f6232013-02-13 12:05:42 +0900592 dev_err(info->dev, "failed to read MUIC register\n");
593 mutex_unlock(&info->mutex);
Sachin Kamat3ad9e862013-04-08 09:13:18 +0900594 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900595 }
596
Chanwoo Choif73f6232013-02-13 12:05:42 +0900597 adc = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC,
598 &attached);
599 if (attached && adc != MAX8997_MUIC_ADC_OPEN) {
600 ret = max8997_muic_adc_handler(info);
601 if (ret < 0) {
602 dev_err(info->dev, "Cannot detect ADC cable\n");
603 mutex_unlock(&info->mutex);
604 return ret;
605 }
606 }
Donggeun Kim99f09be2011-11-24 18:12:18 +0900607
Chanwoo Choif73f6232013-02-13 12:05:42 +0900608 chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG,
609 &attached);
610 if (attached && chg_type != MAX8997_CHARGER_TYPE_NONE) {
611 ret = max8997_muic_chg_handler(info);
612 if (ret < 0) {
613 dev_err(info->dev, "Cannot detect charger cable\n");
614 mutex_unlock(&info->mutex);
615 return ret;
616 }
617 }
Donggeun Kim99f09be2011-11-24 18:12:18 +0900618
Chanwoo Choif73f6232013-02-13 12:05:42 +0900619 mutex_unlock(&info->mutex);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900620
Chanwoo Choif73f6232013-02-13 12:05:42 +0900621 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900622}
623
Chanwoo Choiaf5eb1a2013-02-13 15:10:00 +0900624static void max8997_muic_detect_cable_wq(struct work_struct *work)
625{
626 struct max8997_muic_info *info = container_of(to_delayed_work(work),
627 struct max8997_muic_info, wq_detcable);
628 int ret;
629
630 ret = max8997_muic_detect_dev(info);
631 if (ret < 0)
Jingoo Han6ed28102013-04-08 09:11:06 +0900632 dev_err(info->dev, "failed to detect cable type\n");
Chanwoo Choiaf5eb1a2013-02-13 15:10:00 +0900633}
634
Bill Pemberton44f34fd2012-11-19 13:23:21 -0500635static int max8997_muic_probe(struct platform_device *pdev)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900636{
Chanwoo Choib76668b2012-05-09 12:31:58 +0900637 struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent);
638 struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900639 struct max8997_muic_info *info;
Chanwoo Choiaf5eb1a2013-02-13 15:10:00 +0900640 int delay_jiffies;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900641 int ret, i;
642
Sachin Kamat0b672e92012-11-20 15:46:47 +0900643 info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
644 GFP_KERNEL);
Jingoo Han0a16ee62014-07-23 10:07:09 +0900645 if (!info)
Sachin Kamat0b672e92012-11-20 15:46:47 +0900646 return -ENOMEM;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900647
Donggeun Kim99f09be2011-11-24 18:12:18 +0900648 info->dev = &pdev->dev;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900649 info->muic = max8997->muic;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900650
651 platform_set_drvdata(pdev, info);
652 mutex_init(&info->mutex);
653
Donggeun Kim99f09be2011-11-24 18:12:18 +0900654 INIT_WORK(&info->irq_work, max8997_muic_irq_work);
655
656 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
657 struct max8997_muic_irq *muic_irq = &muic_irqs[i];
Sachin Kamat68c92742012-11-20 15:46:41 +0900658 unsigned int virq = 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900659
Chanwoo Choidca1a712012-07-02 09:03:00 +0900660 virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq);
Sachin Kamat68c92742012-11-20 15:46:41 +0900661 if (!virq) {
662 ret = -EINVAL;
Chanwoo Choidca1a712012-07-02 09:03:00 +0900663 goto err_irq;
Sachin Kamat68c92742012-11-20 15:46:41 +0900664 }
Chanwoo Choidca1a712012-07-02 09:03:00 +0900665 muic_irq->virq = virq;
666
Chanwoo Choiae3b3212012-11-28 12:39:01 +0900667 ret = request_threaded_irq(virq, NULL,
668 max8997_muic_irq_handler,
669 IRQF_NO_SUSPEND,
670 muic_irq->name, info);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900671 if (ret) {
672 dev_err(&pdev->dev,
Chanwoo Choi34825e52015-03-07 01:41:36 +0900673 "failed: irq request (IRQ: %d, error :%d)\n",
Donggeun Kim99f09be2011-11-24 18:12:18 +0900674 muic_irq->irq, ret);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900675 goto err_irq;
676 }
677 }
678
Chanwoo Choib76668b2012-05-09 12:31:58 +0900679 /* External connector */
Chanwoo Choi22f9afb2014-04-21 20:37:51 +0900680 info->edev = devm_extcon_dev_allocate(&pdev->dev, max8997_extcon_cable);
681 if (IS_ERR(info->edev)) {
Chanwoo Choib76668b2012-05-09 12:31:58 +0900682 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
683 ret = -ENOMEM;
684 goto err_irq;
685 }
Chanwoo Choi22f9afb2014-04-21 20:37:51 +0900686
Sangjung Woo29238032014-04-21 19:10:13 +0900687 ret = devm_extcon_dev_register(&pdev->dev, info->edev);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900688 if (ret) {
689 dev_err(&pdev->dev, "failed to register extcon device\n");
Sachin Kamat0b672e92012-11-20 15:46:47 +0900690 goto err_irq;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900691 }
692
Krzysztof Kozlowskidfee4112014-04-09 15:20:14 +0200693 if (pdata && pdata->muic_pdata) {
Chanwoo Choi810d6012013-02-18 10:15:03 +0900694 struct max8997_muic_platform_data *muic_pdata
695 = pdata->muic_pdata;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900696
Chanwoo Choi810d6012013-02-18 10:15:03 +0900697 /* Initialize registers according to platform data */
698 for (i = 0; i < muic_pdata->num_init_data; i++) {
699 max8997_write_reg(info->muic,
700 muic_pdata->init_data[i].addr,
701 muic_pdata->init_data[i].data);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900702 }
Donggeun Kim99f09be2011-11-24 18:12:18 +0900703
Chanwoo Choi810d6012013-02-18 10:15:03 +0900704 /*
705 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
706 * h/w path of COMP2/COMN1 on CONTROL1 register.
707 */
708 if (muic_pdata->path_uart)
709 info->path_uart = muic_pdata->path_uart;
710 else
711 info->path_uart = CONTROL1_SW_UART;
712
713 if (muic_pdata->path_usb)
714 info->path_usb = muic_pdata->path_usb;
715 else
716 info->path_usb = CONTROL1_SW_USB;
717
718 /*
719 * Default delay time for detecting cable state
720 * after certain time.
721 */
722 if (muic_pdata->detcable_delay_ms)
723 delay_jiffies =
724 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
725 else
726 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
727 } else {
Chanwoo Choi685dc9a2013-02-13 15:04:15 +0900728 info->path_uart = CONTROL1_SW_UART;
Chanwoo Choi685dc9a2013-02-13 15:04:15 +0900729 info->path_usb = CONTROL1_SW_USB;
Chanwoo Choi810d6012013-02-18 10:15:03 +0900730 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
731 }
Chanwoo Choi685dc9a2013-02-13 15:04:15 +0900732
733 /* Set initial path for UART */
734 max8997_muic_set_path(info, info->path_uart, true);
735
Chanwoo Choi027fcd52013-02-13 08:50:00 +0900736 /* Set ADC debounce time */
737 max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
738
Chanwoo Choiaf5eb1a2013-02-13 15:10:00 +0900739 /*
740 * Detect accessory after completing the initialization of platform
741 *
742 * - Use delayed workqueue to detect cable state and then
743 * notify cable state to notifiee/platform through uevent.
744 * After completing the booting of platform, the extcon provider
745 * driver should notify cable state to upper layer.
746 */
747 INIT_DELAYED_WORK(&info->wq_detcable, max8997_muic_detect_cable_wq);
Krzysztof Kozlowskibf9509e2014-04-09 15:20:15 +0200748 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
749 delay_jiffies);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900750
Chanwoo Choiaf5eb1a2013-02-13 15:10:00 +0900751 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900752
753err_irq:
Axel Lin3241d562012-03-26 09:57:08 +0800754 while (--i >= 0)
Chanwoo Choidca1a712012-07-02 09:03:00 +0900755 free_irq(muic_irqs[i].virq, info);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900756 return ret;
757}
758
Bill Pemberton93ed0322012-11-19 13:25:49 -0500759static int max8997_muic_remove(struct platform_device *pdev)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900760{
761 struct max8997_muic_info *info = platform_get_drvdata(pdev);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900762 int i;
763
Donggeun Kim99f09be2011-11-24 18:12:18 +0900764 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
Chanwoo Choidca1a712012-07-02 09:03:00 +0900765 free_irq(muic_irqs[i].virq, info);
Donggeun Kim71e58782011-12-15 18:20:47 +0900766 cancel_work_sync(&info->irq_work);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900767
Donggeun Kim99f09be2011-11-24 18:12:18 +0900768 return 0;
769}
770
771static struct platform_driver max8997_muic_driver = {
772 .driver = {
Chanwoo Choib76668b2012-05-09 12:31:58 +0900773 .name = DEV_NAME,
Donggeun Kim99f09be2011-11-24 18:12:18 +0900774 },
775 .probe = max8997_muic_probe,
Bill Pemberton5f7e2222012-11-19 13:20:06 -0500776 .remove = max8997_muic_remove,
Donggeun Kim99f09be2011-11-24 18:12:18 +0900777};
778
Axel Linb00e1262012-01-22 15:33:49 +0800779module_platform_driver(max8997_muic_driver);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900780
Chanwoo Choib76668b2012-05-09 12:31:58 +0900781MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver");
Donggeun Kim99f09be2011-11-24 18:12:18 +0900782MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
783MODULE_LICENSE("GPL");