Commit | Line | Data |
---|---|---|
99f09beb | 1 | /* |
b76668ba | 2 | * extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC |
99f09beb | 3 | * |
2ca36f4a | 4 | * Copyright (C) 2012 Samsung Electronics |
99f09beb DK |
5 | * 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. | |
99f09beb DK |
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/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> | |
b76668ba | 28 | #include <linux/extcon.h> |
dca1a71e | 29 | #include <linux/irqdomain.h> |
b76668ba CC |
30 | |
31 | #define DEV_NAME "max8997-muic" | |
af5eb1a1 | 32 | #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ |
99f09beb | 33 | |
027fcd50 CC |
34 | enum 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 | ||
99f09beb DK |
41 | struct max8997_muic_irq { |
42 | unsigned int irq; | |
43 | const char *name; | |
dca1a71e | 44 | unsigned int virq; |
99f09beb DK |
45 | }; |
46 | ||
47 | static struct max8997_muic_irq muic_irqs[] = { | |
f73f6232 CC |
48 | { 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 */ | |
60 | enum 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 | ||
95 | enum 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 | ||
102 | enum max8997_muic_usb_type { | |
103 | MAX8997_USB_HOST, | |
104 | MAX8997_USB_DEVICE, | |
105 | }; | |
106 | ||
107 | enum 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, | |
99f09beb DK |
115 | }; |
116 | ||
117 | struct max8997_muic_info { | |
118 | struct device *dev; | |
99f09beb | 119 | struct i2c_client *muic; |
f73f6232 CC |
120 | struct extcon_dev *edev; |
121 | int prev_cable_type; | |
122 | int prev_chg_type; | |
123 | u8 status[2]; | |
99f09beb DK |
124 | |
125 | int irq; | |
126 | struct work_struct irq_work; | |
99f09beb | 127 | struct mutex mutex; |
b76668ba | 128 | |
f73f6232 CC |
129 | struct max8997_muic_platform_data *muic_pdata; |
130 | enum max8997_muic_charger_type pre_charger_type; | |
685dc9a7 | 131 | |
af5eb1a1 CC |
132 | /* |
133 | * 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 | ||
685dc9a7 CC |
140 | /* |
141 | * 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; | |
b76668ba CC |
146 | }; |
147 | ||
e3e5bc02 CC |
148 | enum { |
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 | ||
cae93db3 | 163 | static const char *max8997_extcon_cable[] = { |
e3e5bc02 CC |
164 | [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", | |
b76668ba CC |
174 | |
175 | NULL, | |
99f09beb DK |
176 | }; |
177 | ||
027fcd50 CC |
178 | /* |
179 | * 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 | */ | |
183 | static 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"); | |
3ad9e86d | 199 | return ret; |
027fcd50 CC |
200 | } |
201 | break; | |
202 | default: | |
203 | dev_err(info->dev, "invalid ADC debounce time\n"); | |
204 | return -EINVAL; | |
205 | } | |
206 | ||
207 | return 0; | |
208 | }; | |
209 | ||
07c70503 CC |
210 | /* |
211 | * 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 | */ | |
220 | static 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"); | |
3ad9e86d | 235 | return ret; |
07c70503 CC |
236 | } |
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"); | |
3ad9e86d | 248 | return ret; |
07c70503 CC |
249 | } |
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 | ||
f73f6232 CC |
258 | /* |
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 | */ | |
269 | static 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 | ||
99f09beb DK |
335 | static int max8997_muic_handle_usb(struct max8997_muic_info *info, |
336 | enum max8997_muic_usb_type usb_type, bool attached) | |
337 | { | |
99f09beb DK |
338 | int ret = 0; |
339 | ||
340 | if (usb_type == MAX8997_USB_HOST) { | |
685dc9a7 | 341 | ret = max8997_muic_set_path(info, info->path_usb, attached); |
f73f6232 | 342 | if (ret < 0) { |
99f09beb | 343 | dev_err(info->dev, "failed to update muic register\n"); |
f73f6232 | 344 | return ret; |
99f09beb DK |
345 | } |
346 | } | |
347 | ||
b76668ba CC |
348 | 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: | |
f73f6232 CC |
356 | dev_err(info->dev, "failed to detect %s usb cable\n", |
357 | attached ? "attached" : "detached"); | |
358 | return -EINVAL; | |
b76668ba CC |
359 | } |
360 | ||
f73f6232 | 361 | return 0; |
99f09beb DK |
362 | } |
363 | ||
99f09beb | 364 | static int max8997_muic_handle_dock(struct max8997_muic_info *info, |
f73f6232 | 365 | int cable_type, bool attached) |
99f09beb | 366 | { |
99f09beb DK |
367 | int ret = 0; |
368 | ||
07c70503 | 369 | ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached); |
99f09beb DK |
370 | if (ret) { |
371 | dev_err(info->dev, "failed to update muic register\n"); | |
f73f6232 | 372 | return ret; |
99f09beb DK |
373 | } |
374 | ||
f73f6232 CC |
375 | switch (cable_type) { |
376 | case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD: | |
b76668ba | 377 | extcon_set_cable_state(info->edev, "Dock-desk", attached); |
99f09beb | 378 | break; |
f73f6232 | 379 | case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON: |
b76668ba | 380 | extcon_set_cable_state(info->edev, "Dock-card", attached); |
99f09beb DK |
381 | break; |
382 | default: | |
f73f6232 CC |
383 | dev_err(info->dev, "failed to detect %s dock device\n", |
384 | attached ? "attached" : "detached"); | |
385 | return -EINVAL; | |
99f09beb | 386 | } |
f73f6232 CC |
387 | |
388 | return 0; | |
99f09beb DK |
389 | } |
390 | ||
391 | static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info, | |
392 | bool attached) | |
393 | { | |
99f09beb DK |
394 | int ret = 0; |
395 | ||
396 | /* switch to UART */ | |
685dc9a7 | 397 | ret = max8997_muic_set_path(info, info->path_uart, attached); |
99f09beb DK |
398 | if (ret) { |
399 | dev_err(info->dev, "failed to update muic register\n"); | |
3ad9e86d | 400 | return ret; |
99f09beb DK |
401 | } |
402 | ||
b76668ba | 403 | extcon_set_cable_state(info->edev, "JIG", attached); |
99f09beb | 404 | |
f73f6232 | 405 | return 0; |
99f09beb DK |
406 | } |
407 | ||
f73f6232 | 408 | static int max8997_muic_adc_handler(struct max8997_muic_info *info) |
99f09beb | 409 | { |
f73f6232 CC |
410 | int cable_type; |
411 | bool attached; | |
99f09beb DK |
412 | int ret = 0; |
413 | ||
f73f6232 CC |
414 | /* 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; | |
423 | break; | |
424 | case MAX8997_MUIC_ADC_MHL: | |
425 | extcon_set_cable_state(info->edev, "MHL", attached); | |
426 | break; | |
427 | case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
428 | case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON: | |
c2275d2f CC |
429 | ret = max8997_muic_handle_usb(info, |
430 | MAX8997_USB_DEVICE, attached); | |
f73f6232 CC |
431 | if (ret < 0) |
432 | return ret; | |
433 | break; | |
434 | 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; | |
439 | break; | |
440 | case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
441 | ret = max8997_muic_handle_jig_uart(info, attached); | |
442 | break; | |
443 | 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; | |
b76668ba | 476 | default: |
f73f6232 CC |
477 | dev_err(info->dev, |
478 | "failed to detect %s unknown cable (type:0x%x)\n", | |
479 | attached ? "attached" : "detached", cable_type); | |
3cafbd4e | 480 | return -EINVAL; |
b76668ba | 481 | } |
99f09beb | 482 | |
3cafbd4e | 483 | return 0; |
99f09beb DK |
484 | } |
485 | ||
f73f6232 | 486 | static int max8997_muic_chg_handler(struct max8997_muic_info *info) |
99f09beb | 487 | { |
f73f6232 CC |
488 | int chg_type; |
489 | bool attached; | |
490 | int adc; | |
99f09beb | 491 | |
f73f6232 CC |
492 | chg_type = max8997_muic_get_cable_type(info, |
493 | MAX8997_CABLE_GROUP_CHG, &attached); | |
99f09beb | 494 | |
f73f6232 | 495 | switch (chg_type) { |
99f09beb | 496 | case MAX8997_CHARGER_TYPE_NONE: |
99f09beb DK |
497 | break; |
498 | case MAX8997_CHARGER_TYPE_USB: | |
f73f6232 CC |
499 | adc = info->status[0] & STATUS1_ADC_MASK; |
500 | adc >>= STATUS1_ADC_SHIFT; | |
501 | ||
502 | if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) { | |
99f09beb | 503 | max8997_muic_handle_usb(info, |
f73f6232 | 504 | MAX8997_USB_DEVICE, attached); |
99f09beb | 505 | } |
99f09beb DK |
506 | break; |
507 | case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT: | |
c2275d2f CC |
508 | extcon_set_cable_state(info->edev, |
509 | "Charge-downstream", attached); | |
b76668ba | 510 | break; |
99f09beb | 511 | case MAX8997_CHARGER_TYPE_DEDICATED_CHG: |
f73f6232 | 512 | extcon_set_cable_state(info->edev, "TA", attached); |
b76668ba | 513 | break; |
99f09beb | 514 | case MAX8997_CHARGER_TYPE_500MA: |
f73f6232 | 515 | extcon_set_cable_state(info->edev, "Slow-charger", attached); |
b76668ba | 516 | break; |
99f09beb | 517 | case MAX8997_CHARGER_TYPE_1A: |
f73f6232 | 518 | extcon_set_cable_state(info->edev, "Fast-charger", attached); |
99f09beb DK |
519 | break; |
520 | default: | |
f73f6232 CC |
521 | 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; | |
99f09beb DK |
525 | } |
526 | ||
f73f6232 | 527 | return 0; |
99f09beb DK |
528 | } |
529 | ||
530 | static 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); | |
dca1a71e CC |
534 | int irq_type = 0; |
535 | int i, ret; | |
99f09beb | 536 | |
f73f6232 CC |
537 | if (!info->edev) |
538 | return; | |
539 | ||
99f09beb DK |
540 | mutex_lock(&info->mutex); |
541 | ||
ad07d8b4 | 542 | for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) |
f73f6232 CC |
543 | if (info->irq == muic_irqs[i].virq) |
544 | irq_type = muic_irqs[i].irq; | |
545 | ||
99f09beb | 546 | ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1, |
f73f6232 | 547 | 2, info->status); |
99f09beb DK |
548 | if (ret) { |
549 | dev_err(info->dev, "failed to read muic register\n"); | |
550 | mutex_unlock(&info->mutex); | |
551 | return; | |
552 | } | |
553 | ||
99f09beb | 554 | switch (irq_type) { |
f73f6232 CC |
555 | case MAX8997_MUICIRQ_ADCError: |
556 | case MAX8997_MUICIRQ_ADCLow: | |
99f09beb | 557 | case MAX8997_MUICIRQ_ADC: |
f73f6232 CC |
558 | /* Handle all of cable except for charger cable */ |
559 | ret = max8997_muic_adc_handler(info); | |
99f09beb | 560 | break; |
f73f6232 CC |
561 | case MAX8997_MUICIRQ_VBVolt: |
562 | case MAX8997_MUICIRQ_DBChg: | |
563 | case MAX8997_MUICIRQ_DCDTmr: | |
564 | case MAX8997_MUICIRQ_ChgDetRun: | |
99f09beb | 565 | case MAX8997_MUICIRQ_ChgTyp: |
f73f6232 CC |
566 | /* Handle charger cable */ |
567 | ret = max8997_muic_chg_handler(info); | |
568 | break; | |
569 | case MAX8997_MUICIRQ_OVP: | |
99f09beb DK |
570 | break; |
571 | default: | |
b76668ba CC |
572 | dev_info(info->dev, "misc interrupt: irq %d occurred\n", |
573 | irq_type); | |
f73f6232 CC |
574 | mutex_unlock(&info->mutex); |
575 | return; | |
99f09beb DK |
576 | } |
577 | ||
f73f6232 CC |
578 | if (ret < 0) |
579 | dev_err(info->dev, "failed to handle MUIC interrupt\n"); | |
580 | ||
99f09beb DK |
581 | mutex_unlock(&info->mutex); |
582 | ||
583 | return; | |
584 | } | |
585 | ||
586 | static 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 | ||
f73f6232 | 598 | static int max8997_muic_detect_dev(struct max8997_muic_info *info) |
99f09beb | 599 | { |
f73f6232 CC |
600 | int ret = 0; |
601 | int adc; | |
602 | int chg_type; | |
603 | bool attached; | |
99f09beb | 604 | |
f73f6232 CC |
605 | 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); | |
99f09beb | 610 | if (ret) { |
f73f6232 CC |
611 | dev_err(info->dev, "failed to read MUIC register\n"); |
612 | mutex_unlock(&info->mutex); | |
3ad9e86d | 613 | return ret; |
99f09beb DK |
614 | } |
615 | ||
f73f6232 CC |
616 | 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 | } | |
99f09beb | 626 | |
f73f6232 CC |
627 | 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 | } | |
99f09beb | 637 | |
f73f6232 | 638 | mutex_unlock(&info->mutex); |
99f09beb | 639 | |
f73f6232 | 640 | return 0; |
99f09beb DK |
641 | } |
642 | ||
af5eb1a1 CC |
643 | static 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) | |
6ed28105 | 651 | dev_err(info->dev, "failed to detect cable type\n"); |
af5eb1a1 CC |
652 | } |
653 | ||
44f34fd4 | 654 | static int max8997_muic_probe(struct platform_device *pdev) |
99f09beb | 655 | { |
b76668ba CC |
656 | struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent); |
657 | struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev); | |
99f09beb | 658 | struct max8997_muic_info *info; |
af5eb1a1 | 659 | int delay_jiffies; |
99f09beb DK |
660 | int ret, i; |
661 | ||
0b672e9b SK |
662 | info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info), |
663 | GFP_KERNEL); | |
0a16ee63 | 664 | if (!info) |
0b672e9b | 665 | return -ENOMEM; |
99f09beb | 666 | |
99f09beb | 667 | info->dev = &pdev->dev; |
b76668ba | 668 | info->muic = max8997->muic; |
99f09beb DK |
669 | |
670 | platform_set_drvdata(pdev, info); | |
671 | mutex_init(&info->mutex); | |
672 | ||
99f09beb DK |
673 | INIT_WORK(&info->irq_work, max8997_muic_irq_work); |
674 | ||
675 | for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) { | |
676 | struct max8997_muic_irq *muic_irq = &muic_irqs[i]; | |
68c9274d | 677 | unsigned int virq = 0; |
dca1a71e CC |
678 | |
679 | virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq); | |
68c9274d SK |
680 | if (!virq) { |
681 | ret = -EINVAL; | |
dca1a71e | 682 | goto err_irq; |
68c9274d | 683 | } |
dca1a71e | 684 | muic_irq->virq = virq; |
99f09beb | 685 | |
ae3b3215 CC |
686 | ret = request_threaded_irq(virq, NULL, |
687 | max8997_muic_irq_handler, | |
688 | IRQF_NO_SUSPEND, | |
689 | muic_irq->name, info); | |
99f09beb DK |
690 | if (ret) { |
691 | dev_err(&pdev->dev, | |
692 | "failed: irq request (IRQ: %d," | |
693 | " error :%d)\n", | |
694 | muic_irq->irq, ret); | |
99f09beb DK |
695 | goto err_irq; |
696 | } | |
697 | } | |
698 | ||
b76668ba | 699 | /* External connector */ |
22f9afb9 CC |
700 | info->edev = devm_extcon_dev_allocate(&pdev->dev, max8997_extcon_cable); |
701 | if (IS_ERR(info->edev)) { | |
b76668ba CC |
702 | dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); |
703 | ret = -ENOMEM; | |
704 | goto err_irq; | |
705 | } | |
706 | info->edev->name = DEV_NAME; | |
22f9afb9 | 707 | |
2923803d | 708 | ret = devm_extcon_dev_register(&pdev->dev, info->edev); |
b76668ba CC |
709 | if (ret) { |
710 | dev_err(&pdev->dev, "failed to register extcon device\n"); | |
0b672e9b | 711 | goto err_irq; |
b76668ba CC |
712 | } |
713 | ||
dfee4111 | 714 | if (pdata && pdata->muic_pdata) { |
810d601f CC |
715 | struct max8997_muic_platform_data *muic_pdata |
716 | = pdata->muic_pdata; | |
717 | ||
718 | /* Initialize registers according to platform data */ | |
719 | for (i = 0; i < muic_pdata->num_init_data; i++) { | |
720 | max8997_write_reg(info->muic, | |
721 | muic_pdata->init_data[i].addr, | |
722 | muic_pdata->init_data[i].data); | |
b76668ba | 723 | } |
99f09beb | 724 | |
810d601f CC |
725 | /* |
726 | * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB | |
727 | * h/w path of COMP2/COMN1 on CONTROL1 register. | |
728 | */ | |
729 | if (muic_pdata->path_uart) | |
730 | info->path_uart = muic_pdata->path_uart; | |
731 | else | |
732 | info->path_uart = CONTROL1_SW_UART; | |
685dc9a7 | 733 | |
810d601f CC |
734 | if (muic_pdata->path_usb) |
735 | info->path_usb = muic_pdata->path_usb; | |
736 | else | |
737 | info->path_usb = CONTROL1_SW_USB; | |
738 | ||
739 | /* | |
740 | * Default delay time for detecting cable state | |
741 | * after certain time. | |
742 | */ | |
743 | if (muic_pdata->detcable_delay_ms) | |
744 | delay_jiffies = | |
745 | msecs_to_jiffies(muic_pdata->detcable_delay_ms); | |
746 | else | |
747 | delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); | |
748 | } else { | |
749 | info->path_uart = CONTROL1_SW_UART; | |
685dc9a7 | 750 | info->path_usb = CONTROL1_SW_USB; |
810d601f CC |
751 | delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); |
752 | } | |
685dc9a7 CC |
753 | |
754 | /* Set initial path for UART */ | |
755 | max8997_muic_set_path(info, info->path_uart, true); | |
756 | ||
027fcd50 CC |
757 | /* Set ADC debounce time */ |
758 | max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); | |
759 | ||
af5eb1a1 CC |
760 | /* |
761 | * Detect accessory after completing the initialization of platform | |
762 | * | |
763 | * - Use delayed workqueue to detect cable state and then | |
764 | * notify cable state to notifiee/platform through uevent. | |
765 | * After completing the booting of platform, the extcon provider | |
766 | * driver should notify cable state to upper layer. | |
767 | */ | |
768 | INIT_DELAYED_WORK(&info->wq_detcable, max8997_muic_detect_cable_wq); | |
bf9509e0 KK |
769 | queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, |
770 | delay_jiffies); | |
99f09beb | 771 | |
af5eb1a1 | 772 | return 0; |
99f09beb DK |
773 | |
774 | err_irq: | |
3241d56e | 775 | while (--i >= 0) |
dca1a71e | 776 | free_irq(muic_irqs[i].virq, info); |
99f09beb DK |
777 | return ret; |
778 | } | |
779 | ||
93ed0327 | 780 | static int max8997_muic_remove(struct platform_device *pdev) |
99f09beb DK |
781 | { |
782 | struct max8997_muic_info *info = platform_get_drvdata(pdev); | |
99f09beb DK |
783 | int i; |
784 | ||
99f09beb | 785 | for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) |
dca1a71e | 786 | free_irq(muic_irqs[i].virq, info); |
71e58782 | 787 | cancel_work_sync(&info->irq_work); |
99f09beb | 788 | |
99f09beb DK |
789 | return 0; |
790 | } | |
791 | ||
792 | static struct platform_driver max8997_muic_driver = { | |
793 | .driver = { | |
b76668ba | 794 | .name = DEV_NAME, |
99f09beb DK |
795 | .owner = THIS_MODULE, |
796 | }, | |
797 | .probe = max8997_muic_probe, | |
5f7e2228 | 798 | .remove = max8997_muic_remove, |
99f09beb DK |
799 | }; |
800 | ||
b00e126f | 801 | module_platform_driver(max8997_muic_driver); |
99f09beb | 802 | |
b76668ba | 803 | MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver"); |
99f09beb DK |
804 | MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>"); |
805 | MODULE_LICENSE("GPL"); |