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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 Choie3e5bc02013-02-12 20:44:19 +0900148enum {
149 EXTCON_CABLE_USB = 0,
150 EXTCON_CABLE_USB_HOST,
151 EXTCON_CABLE_TA,
152 EXTCON_CABLE_FAST_CHARGER,
153 EXTCON_CABLE_SLOW_CHARGER,
154 EXTCON_CABLE_CHARGE_DOWNSTREAM,
155 EXTCON_CABLE_MHL,
156 EXTCON_CABLE_DOCK_DESK,
157 EXTCON_CABLE_DOCK_CARD,
158 EXTCON_CABLE_JIG,
159
160 _EXTCON_CABLE_NUM,
161};
162
Sachin Kamatcae93db2013-01-31 09:29:29 +0900163static const char *max8997_extcon_cable[] = {
Chanwoo Choie3e5bc02013-02-12 20:44:19 +0900164 [EXTCON_CABLE_USB] = "USB",
165 [EXTCON_CABLE_USB_HOST] = "USB-Host",
166 [EXTCON_CABLE_TA] = "TA",
167 [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger",
168 [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger",
169 [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream",
170 [EXTCON_CABLE_MHL] = "MHL",
171 [EXTCON_CABLE_DOCK_DESK] = "Dock-Desk",
172 [EXTCON_CABLE_DOCK_CARD] = "Dock-Card",
173 [EXTCON_CABLE_JIG] = "JIG",
Chanwoo Choib76668b2012-05-09 12:31:58 +0900174
175 NULL,
Donggeun Kim99f09be2011-11-24 18:12:18 +0900176};
177
Chanwoo Choi07c70502013-02-13 08:42:37 +0900178/*
Chanwoo Choi027fcd52013-02-13 08:50:00 +0900179 * max8997_muic_set_debounce_time - Set the debounce time of ADC
180 * @info: the instance including private data of max8997 MUIC
181 * @time: the debounce time of ADC
182 */
183static int max8997_muic_set_debounce_time(struct max8997_muic_info *info,
184 enum max8997_muic_adc_debounce_time time)
185{
186 int ret;
187
188 switch (time) {
189 case ADC_DEBOUNCE_TIME_0_5MS:
190 case ADC_DEBOUNCE_TIME_10MS:
191 case ADC_DEBOUNCE_TIME_25MS:
192 case ADC_DEBOUNCE_TIME_38_62MS:
193 ret = max8997_update_reg(info->muic,
194 MAX8997_MUIC_REG_CONTROL3,
195 time << CONTROL3_ADCDBSET_SHIFT,
196 CONTROL3_ADCDBSET_MASK);
197 if (ret) {
198 dev_err(info->dev, "failed to set ADC debounce time\n");
Sachin Kamat3ad9e862013-04-08 09:13:18 +0900199 return ret;
Chanwoo Choi027fcd52013-02-13 08:50:00 +0900200 }
201 break;
202 default:
203 dev_err(info->dev, "invalid ADC debounce time\n");
204 return -EINVAL;
205 }
206
207 return 0;
208};
209
210/*
Chanwoo Choi07c70502013-02-13 08:42:37 +0900211 * max8997_muic_set_path - Set hardware line according to attached cable
212 * @info: the instance including private data of max8997 MUIC
213 * @value: the path according to attached cable
214 * @attached: the state of cable (true:attached, false:detached)
215 *
216 * The max8997 MUIC device share outside H/W line among a varity of cables,
217 * so this function set internal path of H/W line according to the type of
218 * attached cable.
219 */
220static int max8997_muic_set_path(struct max8997_muic_info *info,
221 u8 val, bool attached)
222{
223 int ret = 0;
224 u8 ctrl1, ctrl2 = 0;
225
226 if (attached)
227 ctrl1 = val;
228 else
229 ctrl1 = CONTROL1_SW_OPEN;
230
231 ret = max8997_update_reg(info->muic,
232 MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK);
233 if (ret < 0) {
234 dev_err(info->dev, "failed to update MUIC register\n");
Sachin Kamat3ad9e862013-04-08 09:13:18 +0900235 return ret;
Chanwoo Choi07c70502013-02-13 08:42:37 +0900236 }
237
238 if (attached)
239 ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
240 else
241 ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
242
243 ret = max8997_update_reg(info->muic,
244 MAX8997_MUIC_REG_CONTROL2, ctrl2,
245 CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
246 if (ret < 0) {
247 dev_err(info->dev, "failed to update MUIC register\n");
Sachin Kamat3ad9e862013-04-08 09:13:18 +0900248 return ret;
Chanwoo Choi07c70502013-02-13 08:42:37 +0900249 }
250
251 dev_info(info->dev,
252 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
253 ctrl1, ctrl2, attached ? "attached" : "detached");
254
255 return 0;
256}
257
Chanwoo Choif73f6232013-02-13 12:05:42 +0900258/*
259 * max8997_muic_get_cable_type - Return cable type and check cable state
260 * @info: the instance including private data of max8997 MUIC
261 * @group: the path according to attached cable
262 * @attached: store cable state and return
263 *
264 * This function check the cable state either attached or detached,
265 * and then divide precise type of cable according to cable group.
266 * - MAX8997_CABLE_GROUP_ADC
267 * - MAX8997_CABLE_GROUP_CHG
268 */
269static int max8997_muic_get_cable_type(struct max8997_muic_info *info,
270 enum max8997_muic_cable_group group, bool *attached)
271{
272 int cable_type = 0;
273 int adc;
274 int chg_type;
275
276 switch (group) {
277 case MAX8997_CABLE_GROUP_ADC:
278 /*
279 * Read ADC value to check cable type and decide cable state
280 * according to cable type
281 */
282 adc = info->status[0] & STATUS1_ADC_MASK;
283 adc >>= STATUS1_ADC_SHIFT;
284
285 /*
286 * Check current cable state/cable type and store cable type
287 * (info->prev_cable_type) for handling cable when cable is
288 * detached.
289 */
290 if (adc == MAX8997_MUIC_ADC_OPEN) {
291 *attached = false;
292
293 cable_type = info->prev_cable_type;
294 info->prev_cable_type = MAX8997_MUIC_ADC_OPEN;
295 } else {
296 *attached = true;
297
298 cable_type = info->prev_cable_type = adc;
299 }
300 break;
301 case MAX8997_CABLE_GROUP_CHG:
302 /*
303 * Read charger type to check cable type and decide cable state
304 * according to type of charger cable.
305 */
306 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
307 chg_type >>= STATUS2_CHGTYP_SHIFT;
308
309 if (chg_type == MAX8997_CHARGER_TYPE_NONE) {
310 *attached = false;
311
312 cable_type = info->prev_chg_type;
313 info->prev_chg_type = MAX8997_CHARGER_TYPE_NONE;
314 } else {
315 *attached = true;
316
317 /*
318 * Check current cable state/cable type and store cable
319 * type(info->prev_chg_type) for handling cable when
320 * charger cable is detached.
321 */
322 cable_type = info->prev_chg_type = chg_type;
323 }
324
325 break;
326 default:
327 dev_err(info->dev, "Unknown cable group (%d)\n", group);
328 cable_type = -EINVAL;
329 break;
330 }
331
332 return cable_type;
333}
334
Donggeun Kim99f09be2011-11-24 18:12:18 +0900335static int max8997_muic_handle_usb(struct max8997_muic_info *info,
336 enum max8997_muic_usb_type usb_type, bool attached)
337{
Donggeun Kim99f09be2011-11-24 18:12:18 +0900338 int ret = 0;
339
340 if (usb_type == MAX8997_USB_HOST) {
Chanwoo Choi685dc9a2013-02-13 15:04:15 +0900341 ret = max8997_muic_set_path(info, info->path_usb, attached);
Chanwoo Choif73f6232013-02-13 12:05:42 +0900342 if (ret < 0) {
Donggeun Kim99f09be2011-11-24 18:12:18 +0900343 dev_err(info->dev, "failed to update muic register\n");
Chanwoo Choif73f6232013-02-13 12:05:42 +0900344 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900345 }
346 }
347
Chanwoo Choib76668b2012-05-09 12:31:58 +0900348 switch (usb_type) {
349 case MAX8997_USB_HOST:
350 extcon_set_cable_state(info->edev, "USB-Host", attached);
351 break;
352 case MAX8997_USB_DEVICE:
353 extcon_set_cable_state(info->edev, "USB", attached);
354 break;
355 default:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900356 dev_err(info->dev, "failed to detect %s usb cable\n",
357 attached ? "attached" : "detached");
358 return -EINVAL;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900359 }
360
Chanwoo Choif73f6232013-02-13 12:05:42 +0900361 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900362}
363
Donggeun Kim99f09be2011-11-24 18:12:18 +0900364static int max8997_muic_handle_dock(struct max8997_muic_info *info,
Chanwoo Choif73f6232013-02-13 12:05:42 +0900365 int cable_type, bool attached)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900366{
Donggeun Kim99f09be2011-11-24 18:12:18 +0900367 int ret = 0;
368
Chanwoo Choi07c70502013-02-13 08:42:37 +0900369 ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900370 if (ret) {
371 dev_err(info->dev, "failed to update muic register\n");
Chanwoo Choif73f6232013-02-13 12:05:42 +0900372 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900373 }
374
Chanwoo Choif73f6232013-02-13 12:05:42 +0900375 switch (cable_type) {
376 case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900377 extcon_set_cable_state(info->edev, "Dock-desk", attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900378 break;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900379 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900380 extcon_set_cable_state(info->edev, "Dock-card", attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900381 break;
382 default:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900383 dev_err(info->dev, "failed to detect %s dock device\n",
384 attached ? "attached" : "detached");
385 return -EINVAL;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900386 }
Chanwoo Choif73f6232013-02-13 12:05:42 +0900387
388 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900389}
390
391static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
392 bool attached)
393{
Donggeun Kim99f09be2011-11-24 18:12:18 +0900394 int ret = 0;
395
396 /* switch to UART */
Chanwoo Choi685dc9a2013-02-13 15:04:15 +0900397 ret = max8997_muic_set_path(info, info->path_uart, attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900398 if (ret) {
399 dev_err(info->dev, "failed to update muic register\n");
Sachin Kamat3ad9e862013-04-08 09:13:18 +0900400 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900401 }
402
Chanwoo Choib76668b2012-05-09 12:31:58 +0900403 extcon_set_cable_state(info->edev, "JIG", attached);
Chanwoo Choif73f6232013-02-13 12:05:42 +0900404
405 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900406}
407
Chanwoo Choif73f6232013-02-13 12:05:42 +0900408static int max8997_muic_adc_handler(struct max8997_muic_info *info)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900409{
Chanwoo Choif73f6232013-02-13 12:05:42 +0900410 int cable_type;
411 bool attached;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900412 int ret = 0;
413
Chanwoo Choif73f6232013-02-13 12:05:42 +0900414 /* Check cable state which is either detached or attached */
415 cable_type = max8997_muic_get_cable_type(info,
416 MAX8997_CABLE_GROUP_ADC, &attached);
417
418 switch (cable_type) {
419 case MAX8997_MUIC_ADC_GROUND:
420 ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, attached);
421 if (ret < 0)
422 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900423 break;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900424 case MAX8997_MUIC_ADC_MHL:
425 extcon_set_cable_state(info->edev, "MHL", attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900426 break;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900427 case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF:
428 case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON:
Chanwoo Choic2275d22013-08-23 10:21:37 +0900429 ret = max8997_muic_handle_usb(info,
430 MAX8997_USB_DEVICE, attached);
Chanwoo Choif73f6232013-02-13 12:05:42 +0900431 if (ret < 0)
432 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900433 break;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900434 case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
435 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
436 ret = max8997_muic_handle_dock(info, cable_type, attached);
437 if (ret < 0)
438 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900439 break;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900440 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF:
441 ret = max8997_muic_handle_jig_uart(info, attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900442 break;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900443 case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON:
444 case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON:
445 case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON:
446 case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON:
447 case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON:
448 case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON:
449 case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON:
450 case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON:
451 case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON:
452 case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON:
453 case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON:
454 case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON:
455 case MAX8997_MUIC_ADC_RESERVED_ACC_1:
456 case MAX8997_MUIC_ADC_RESERVED_ACC_2:
457 case MAX8997_MUIC_ADC_RESERVED_ACC_3:
458 case MAX8997_MUIC_ADC_RESERVED_ACC_4:
459 case MAX8997_MUIC_ADC_RESERVED_ACC_5:
460 case MAX8997_MUIC_ADC_CEA936_AUDIO:
461 case MAX8997_MUIC_ADC_PHONE_POWERED_DEV:
462 case MAX8997_MUIC_ADC_TTY_CONVERTER:
463 case MAX8997_MUIC_ADC_UART_CABLE:
464 case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG:
465 case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG:
466 case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE:
467 /*
468 * This cable isn't used in general case if it is specially
469 * needed to detect additional cable, should implement
470 * proper operation when this cable is attached/detached.
471 */
472 dev_info(info->dev,
473 "cable is %s but it isn't used (type:0x%x)\n",
474 attached ? "attached" : "detached", cable_type);
475 return -EAGAIN;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900476 default:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900477 dev_err(info->dev,
478 "failed to detect %s unknown cable (type:0x%x)\n",
479 attached ? "attached" : "detached", cable_type);
Devendra Naga3cafbd42012-08-31 14:00:19 +0530480 return -EINVAL;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900481 }
Donggeun Kim99f09be2011-11-24 18:12:18 +0900482
Devendra Naga3cafbd42012-08-31 14:00:19 +0530483 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900484}
485
Chanwoo Choif73f6232013-02-13 12:05:42 +0900486static int max8997_muic_chg_handler(struct max8997_muic_info *info)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900487{
Chanwoo Choif73f6232013-02-13 12:05:42 +0900488 int chg_type;
489 bool attached;
490 int adc;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900491
Chanwoo Choif73f6232013-02-13 12:05:42 +0900492 chg_type = max8997_muic_get_cable_type(info,
493 MAX8997_CABLE_GROUP_CHG, &attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900494
Chanwoo Choif73f6232013-02-13 12:05:42 +0900495 switch (chg_type) {
Donggeun Kim99f09be2011-11-24 18:12:18 +0900496 case MAX8997_CHARGER_TYPE_NONE:
Donggeun Kim99f09be2011-11-24 18:12:18 +0900497 break;
498 case MAX8997_CHARGER_TYPE_USB:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900499 adc = info->status[0] & STATUS1_ADC_MASK;
500 adc >>= STATUS1_ADC_SHIFT;
501
502 if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) {
Donggeun Kim99f09be2011-11-24 18:12:18 +0900503 max8997_muic_handle_usb(info,
Chanwoo Choif73f6232013-02-13 12:05:42 +0900504 MAX8997_USB_DEVICE, attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900505 }
Donggeun Kim99f09be2011-11-24 18:12:18 +0900506 break;
507 case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
Chanwoo Choic2275d22013-08-23 10:21:37 +0900508 extcon_set_cable_state(info->edev,
509 "Charge-downstream", attached);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900510 break;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900511 case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900512 extcon_set_cable_state(info->edev, "TA", attached);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900513 break;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900514 case MAX8997_CHARGER_TYPE_500MA:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900515 extcon_set_cable_state(info->edev, "Slow-charger", attached);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900516 break;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900517 case MAX8997_CHARGER_TYPE_1A:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900518 extcon_set_cable_state(info->edev, "Fast-charger", attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900519 break;
520 default:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900521 dev_err(info->dev,
522 "failed to detect %s unknown chg cable (type:0x%x)\n",
523 attached ? "attached" : "detached", chg_type);
524 return -EINVAL;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900525 }
526
Chanwoo Choif73f6232013-02-13 12:05:42 +0900527 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900528}
529
530static void max8997_muic_irq_work(struct work_struct *work)
531{
532 struct max8997_muic_info *info = container_of(work,
533 struct max8997_muic_info, irq_work);
Chanwoo Choidca1a712012-07-02 09:03:00 +0900534 int irq_type = 0;
535 int i, ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900536
Chanwoo Choif73f6232013-02-13 12:05:42 +0900537 if (!info->edev)
538 return;
539
Donggeun Kim99f09be2011-11-24 18:12:18 +0900540 mutex_lock(&info->mutex);
541
Sachin Kamatad07d8b2013-08-05 14:32:03 +0530542 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
Chanwoo Choif73f6232013-02-13 12:05:42 +0900543 if (info->irq == muic_irqs[i].virq)
544 irq_type = muic_irqs[i].irq;
545
Donggeun Kim99f09be2011-11-24 18:12:18 +0900546 ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
Chanwoo Choif73f6232013-02-13 12:05:42 +0900547 2, info->status);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900548 if (ret) {
549 dev_err(info->dev, "failed to read muic register\n");
550 mutex_unlock(&info->mutex);
551 return;
552 }
553
Donggeun Kim99f09be2011-11-24 18:12:18 +0900554 switch (irq_type) {
Chanwoo Choif73f6232013-02-13 12:05:42 +0900555 case MAX8997_MUICIRQ_ADCError:
556 case MAX8997_MUICIRQ_ADCLow:
Donggeun Kim99f09be2011-11-24 18:12:18 +0900557 case MAX8997_MUICIRQ_ADC:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900558 /* Handle all of cable except for charger cable */
559 ret = max8997_muic_adc_handler(info);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900560 break;
Chanwoo Choif73f6232013-02-13 12:05:42 +0900561 case MAX8997_MUICIRQ_VBVolt:
562 case MAX8997_MUICIRQ_DBChg:
563 case MAX8997_MUICIRQ_DCDTmr:
564 case MAX8997_MUICIRQ_ChgDetRun:
Donggeun Kim99f09be2011-11-24 18:12:18 +0900565 case MAX8997_MUICIRQ_ChgTyp:
Chanwoo Choif73f6232013-02-13 12:05:42 +0900566 /* Handle charger cable */
567 ret = max8997_muic_chg_handler(info);
568 break;
569 case MAX8997_MUICIRQ_OVP:
Donggeun Kim99f09be2011-11-24 18:12:18 +0900570 break;
571 default:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900572 dev_info(info->dev, "misc interrupt: irq %d occurred\n",
573 irq_type);
Chanwoo Choif73f6232013-02-13 12:05:42 +0900574 mutex_unlock(&info->mutex);
575 return;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900576 }
577
Chanwoo Choif73f6232013-02-13 12:05:42 +0900578 if (ret < 0)
579 dev_err(info->dev, "failed to handle MUIC interrupt\n");
580
Donggeun Kim99f09be2011-11-24 18:12:18 +0900581 mutex_unlock(&info->mutex);
582
583 return;
584}
585
586static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
587{
588 struct max8997_muic_info *info = data;
589
590 dev_dbg(info->dev, "irq:%d\n", irq);
591 info->irq = irq;
592
593 schedule_work(&info->irq_work);
594
595 return IRQ_HANDLED;
596}
597
Chanwoo Choif73f6232013-02-13 12:05:42 +0900598static int max8997_muic_detect_dev(struct max8997_muic_info *info)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900599{
Chanwoo Choif73f6232013-02-13 12:05:42 +0900600 int ret = 0;
601 int adc;
602 int chg_type;
603 bool attached;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900604
Chanwoo Choif73f6232013-02-13 12:05:42 +0900605 mutex_lock(&info->mutex);
606
607 /* Read STATUSx register to detect accessory */
608 ret = max8997_bulk_read(info->muic,
609 MAX8997_MUIC_REG_STATUS1, 2, info->status);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900610 if (ret) {
Chanwoo Choif73f6232013-02-13 12:05:42 +0900611 dev_err(info->dev, "failed to read MUIC register\n");
612 mutex_unlock(&info->mutex);
Sachin Kamat3ad9e862013-04-08 09:13:18 +0900613 return ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900614 }
615
Chanwoo Choif73f6232013-02-13 12:05:42 +0900616 adc = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC,
617 &attached);
618 if (attached && adc != MAX8997_MUIC_ADC_OPEN) {
619 ret = max8997_muic_adc_handler(info);
620 if (ret < 0) {
621 dev_err(info->dev, "Cannot detect ADC cable\n");
622 mutex_unlock(&info->mutex);
623 return ret;
624 }
625 }
Donggeun Kim99f09be2011-11-24 18:12:18 +0900626
Chanwoo Choif73f6232013-02-13 12:05:42 +0900627 chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG,
628 &attached);
629 if (attached && chg_type != MAX8997_CHARGER_TYPE_NONE) {
630 ret = max8997_muic_chg_handler(info);
631 if (ret < 0) {
632 dev_err(info->dev, "Cannot detect charger cable\n");
633 mutex_unlock(&info->mutex);
634 return ret;
635 }
636 }
Donggeun Kim99f09be2011-11-24 18:12:18 +0900637
Chanwoo Choif73f6232013-02-13 12:05:42 +0900638 mutex_unlock(&info->mutex);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900639
Chanwoo Choif73f6232013-02-13 12:05:42 +0900640 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900641}
642
Chanwoo Choiaf5eb1a2013-02-13 15:10:00 +0900643static void max8997_muic_detect_cable_wq(struct work_struct *work)
644{
645 struct max8997_muic_info *info = container_of(to_delayed_work(work),
646 struct max8997_muic_info, wq_detcable);
647 int ret;
648
649 ret = max8997_muic_detect_dev(info);
650 if (ret < 0)
Jingoo Han6ed28102013-04-08 09:11:06 +0900651 dev_err(info->dev, "failed to detect cable type\n");
Chanwoo Choiaf5eb1a2013-02-13 15:10:00 +0900652}
653
Bill Pemberton44f34fd2012-11-19 13:23:21 -0500654static int max8997_muic_probe(struct platform_device *pdev)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900655{
Chanwoo Choib76668b2012-05-09 12:31:58 +0900656 struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent);
657 struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900658 struct max8997_muic_info *info;
Chanwoo Choiaf5eb1a2013-02-13 15:10:00 +0900659 int delay_jiffies;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900660 int ret, i;
661
Sachin Kamat0b672e92012-11-20 15:46:47 +0900662 info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
663 GFP_KERNEL);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900664 if (!info) {
665 dev_err(&pdev->dev, "failed to allocate memory\n");
Sachin Kamat0b672e92012-11-20 15:46:47 +0900666 return -ENOMEM;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900667 }
668
Donggeun Kim99f09be2011-11-24 18:12:18 +0900669 info->dev = &pdev->dev;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900670 info->muic = max8997->muic;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900671
672 platform_set_drvdata(pdev, info);
673 mutex_init(&info->mutex);
674
Donggeun Kim99f09be2011-11-24 18:12:18 +0900675 INIT_WORK(&info->irq_work, max8997_muic_irq_work);
676
677 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
678 struct max8997_muic_irq *muic_irq = &muic_irqs[i];
Sachin Kamat68c92742012-11-20 15:46:41 +0900679 unsigned int virq = 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900680
Chanwoo Choidca1a712012-07-02 09:03:00 +0900681 virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq);
Sachin Kamat68c92742012-11-20 15:46:41 +0900682 if (!virq) {
683 ret = -EINVAL;
Chanwoo Choidca1a712012-07-02 09:03:00 +0900684 goto err_irq;
Sachin Kamat68c92742012-11-20 15:46:41 +0900685 }
Chanwoo Choidca1a712012-07-02 09:03:00 +0900686 muic_irq->virq = virq;
687
Chanwoo Choiae3b3212012-11-28 12:39:01 +0900688 ret = request_threaded_irq(virq, NULL,
689 max8997_muic_irq_handler,
690 IRQF_NO_SUSPEND,
691 muic_irq->name, info);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900692 if (ret) {
693 dev_err(&pdev->dev,
694 "failed: irq request (IRQ: %d,"
695 " error :%d)\n",
696 muic_irq->irq, ret);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900697 goto err_irq;
698 }
699 }
700
Chanwoo Choib76668b2012-05-09 12:31:58 +0900701 /* External connector */
Sachin Kamat0b672e92012-11-20 15:46:47 +0900702 info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev),
703 GFP_KERNEL);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900704 if (!info->edev) {
705 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
706 ret = -ENOMEM;
707 goto err_irq;
708 }
709 info->edev->name = DEV_NAME;
Chanwoo Choi42d7d752013-09-27 09:20:26 +0900710 info->edev->dev.parent = &pdev->dev;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900711 info->edev->supported_cable = max8997_extcon_cable;
Chanwoo Choi42d7d752013-09-27 09:20:26 +0900712 ret = extcon_dev_register(info->edev);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900713 if (ret) {
714 dev_err(&pdev->dev, "failed to register extcon device\n");
Sachin Kamat0b672e92012-11-20 15:46:47 +0900715 goto err_irq;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900716 }
717
Chanwoo Choib76668b2012-05-09 12:31:58 +0900718 if (pdata->muic_pdata) {
Chanwoo Choi810d6012013-02-18 10:15:03 +0900719 struct max8997_muic_platform_data *muic_pdata
720 = pdata->muic_pdata;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900721
Chanwoo Choi810d6012013-02-18 10:15:03 +0900722 /* Initialize registers according to platform data */
723 for (i = 0; i < muic_pdata->num_init_data; i++) {
724 max8997_write_reg(info->muic,
725 muic_pdata->init_data[i].addr,
726 muic_pdata->init_data[i].data);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900727 }
Donggeun Kim99f09be2011-11-24 18:12:18 +0900728
Chanwoo Choi810d6012013-02-18 10:15:03 +0900729 /*
730 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
731 * h/w path of COMP2/COMN1 on CONTROL1 register.
732 */
733 if (muic_pdata->path_uart)
734 info->path_uart = muic_pdata->path_uart;
735 else
736 info->path_uart = CONTROL1_SW_UART;
737
738 if (muic_pdata->path_usb)
739 info->path_usb = muic_pdata->path_usb;
740 else
741 info->path_usb = CONTROL1_SW_USB;
742
743 /*
744 * Default delay time for detecting cable state
745 * after certain time.
746 */
747 if (muic_pdata->detcable_delay_ms)
748 delay_jiffies =
749 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
750 else
751 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
752 } else {
Chanwoo Choi685dc9a2013-02-13 15:04:15 +0900753 info->path_uart = CONTROL1_SW_UART;
Chanwoo Choi685dc9a2013-02-13 15:04:15 +0900754 info->path_usb = CONTROL1_SW_USB;
Chanwoo Choi810d6012013-02-18 10:15:03 +0900755 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
756 }
Chanwoo Choi685dc9a2013-02-13 15:04:15 +0900757
758 /* Set initial path for UART */
759 max8997_muic_set_path(info, info->path_uart, true);
760
Chanwoo Choi027fcd52013-02-13 08:50:00 +0900761 /* Set ADC debounce time */
762 max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
763
Chanwoo Choiaf5eb1a2013-02-13 15:10:00 +0900764 /*
765 * Detect accessory after completing the initialization of platform
766 *
767 * - Use delayed workqueue to detect cable state and then
768 * notify cable state to notifiee/platform through uevent.
769 * After completing the booting of platform, the extcon provider
770 * driver should notify cable state to upper layer.
771 */
772 INIT_DELAYED_WORK(&info->wq_detcable, max8997_muic_detect_cable_wq);
Chanwoo Choiaf5eb1a2013-02-13 15:10:00 +0900773 schedule_delayed_work(&info->wq_detcable, delay_jiffies);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900774
Chanwoo Choiaf5eb1a2013-02-13 15:10:00 +0900775 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900776
777err_irq:
Axel Lin3241d562012-03-26 09:57:08 +0800778 while (--i >= 0)
Chanwoo Choidca1a712012-07-02 09:03:00 +0900779 free_irq(muic_irqs[i].virq, info);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900780 return ret;
781}
782
Bill Pemberton93ed0322012-11-19 13:25:49 -0500783static int max8997_muic_remove(struct platform_device *pdev)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900784{
785 struct max8997_muic_info *info = platform_get_drvdata(pdev);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900786 int i;
787
Donggeun Kim99f09be2011-11-24 18:12:18 +0900788 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
Chanwoo Choidca1a712012-07-02 09:03:00 +0900789 free_irq(muic_irqs[i].virq, info);
Donggeun Kim71e58782011-12-15 18:20:47 +0900790 cancel_work_sync(&info->irq_work);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900791
Chanwoo Choib76668b2012-05-09 12:31:58 +0900792 extcon_dev_unregister(info->edev);
793
Donggeun Kim99f09be2011-11-24 18:12:18 +0900794 return 0;
795}
796
797static struct platform_driver max8997_muic_driver = {
798 .driver = {
Chanwoo Choib76668b2012-05-09 12:31:58 +0900799 .name = DEV_NAME,
Donggeun Kim99f09be2011-11-24 18:12:18 +0900800 .owner = THIS_MODULE,
801 },
802 .probe = max8997_muic_probe,
Bill Pemberton5f7e2222012-11-19 13:20:06 -0500803 .remove = max8997_muic_remove,
Donggeun Kim99f09be2011-11-24 18:12:18 +0900804};
805
Axel Linb00e1262012-01-22 15:33:49 +0800806module_platform_driver(max8997_muic_driver);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900807
Chanwoo Choib76668b2012-05-09 12:31:58 +0900808MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver");
Donggeun Kim99f09be2011-11-24 18:12:18 +0900809MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
810MODULE_LICENSE("GPL");