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 | ||
73b6ecdb | 148 | static const unsigned int max8997_extcon_cable[] = { |
2a9de9c0 CC |
149 | 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, | |
99f09beb DK |
159 | }; |
160 | ||
027fcd50 CC |
161 | /* |
162 | * 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 | */ | |
166 | static 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"); | |
3ad9e86d | 182 | return ret; |
027fcd50 CC |
183 | } |
184 | break; | |
185 | default: | |
186 | dev_err(info->dev, "invalid ADC debounce time\n"); | |
187 | return -EINVAL; | |
188 | } | |
189 | ||
190 | return 0; | |
191 | }; | |
192 | ||
07c70503 CC |
193 | /* |
194 | * 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 | */ | |
203 | static 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"); | |
3ad9e86d | 218 | return ret; |
07c70503 CC |
219 | } |
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"); | |
3ad9e86d | 231 | return ret; |
07c70503 CC |
232 | } |
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 | ||
f73f6232 CC |
241 | /* |
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 | */ | |
252 | static 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 | ||
99f09beb DK |
318 | static int max8997_muic_handle_usb(struct max8997_muic_info *info, |
319 | enum max8997_muic_usb_type usb_type, bool attached) | |
320 | { | |
99f09beb DK |
321 | int ret = 0; |
322 | ||
323 | if (usb_type == MAX8997_USB_HOST) { | |
685dc9a7 | 324 | ret = max8997_muic_set_path(info, info->path_usb, attached); |
f73f6232 | 325 | if (ret < 0) { |
99f09beb | 326 | dev_err(info->dev, "failed to update muic register\n"); |
f73f6232 | 327 | return ret; |
99f09beb DK |
328 | } |
329 | } | |
330 | ||
b76668ba CC |
331 | switch (usb_type) { |
332 | case MAX8997_USB_HOST: | |
2a9de9c0 | 333 | extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, attached); |
b76668ba CC |
334 | break; |
335 | case MAX8997_USB_DEVICE: | |
2a9de9c0 | 336 | extcon_set_cable_state_(info->edev, EXTCON_USB, attached); |
b76668ba CC |
337 | break; |
338 | default: | |
f73f6232 CC |
339 | dev_err(info->dev, "failed to detect %s usb cable\n", |
340 | attached ? "attached" : "detached"); | |
341 | return -EINVAL; | |
b76668ba CC |
342 | } |
343 | ||
f73f6232 | 344 | return 0; |
99f09beb DK |
345 | } |
346 | ||
99f09beb | 347 | static int max8997_muic_handle_dock(struct max8997_muic_info *info, |
f73f6232 | 348 | int cable_type, bool attached) |
99f09beb | 349 | { |
99f09beb DK |
350 | int ret = 0; |
351 | ||
07c70503 | 352 | ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached); |
99f09beb DK |
353 | if (ret) { |
354 | dev_err(info->dev, "failed to update muic register\n"); | |
f73f6232 | 355 | return ret; |
99f09beb DK |
356 | } |
357 | ||
f73f6232 CC |
358 | switch (cable_type) { |
359 | case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD: | |
f73f6232 | 360 | case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON: |
2a9de9c0 | 361 | extcon_set_cable_state_(info->edev, EXTCON_DOCK, attached); |
99f09beb DK |
362 | break; |
363 | default: | |
f73f6232 CC |
364 | dev_err(info->dev, "failed to detect %s dock device\n", |
365 | attached ? "attached" : "detached"); | |
366 | return -EINVAL; | |
99f09beb | 367 | } |
f73f6232 CC |
368 | |
369 | return 0; | |
99f09beb DK |
370 | } |
371 | ||
372 | static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info, | |
373 | bool attached) | |
374 | { | |
99f09beb DK |
375 | int ret = 0; |
376 | ||
377 | /* switch to UART */ | |
685dc9a7 | 378 | ret = max8997_muic_set_path(info, info->path_uart, attached); |
99f09beb DK |
379 | if (ret) { |
380 | dev_err(info->dev, "failed to update muic register\n"); | |
3ad9e86d | 381 | return ret; |
99f09beb DK |
382 | } |
383 | ||
2a9de9c0 | 384 | extcon_set_cable_state_(info->edev, EXTCON_JIG, attached); |
99f09beb | 385 | |
f73f6232 | 386 | return 0; |
99f09beb DK |
387 | } |
388 | ||
f73f6232 | 389 | static int max8997_muic_adc_handler(struct max8997_muic_info *info) |
99f09beb | 390 | { |
f73f6232 CC |
391 | int cable_type; |
392 | bool attached; | |
99f09beb DK |
393 | int ret = 0; |
394 | ||
f73f6232 CC |
395 | /* 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; | |
404 | break; | |
405 | case MAX8997_MUIC_ADC_MHL: | |
2a9de9c0 | 406 | extcon_set_cable_state_(info->edev, EXTCON_MHL, attached); |
f73f6232 CC |
407 | break; |
408 | case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
409 | case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON: | |
c2275d2f CC |
410 | ret = max8997_muic_handle_usb(info, |
411 | MAX8997_USB_DEVICE, attached); | |
f73f6232 CC |
412 | if (ret < 0) |
413 | return ret; | |
414 | break; | |
415 | 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; | |
420 | break; | |
421 | case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
422 | ret = max8997_muic_handle_jig_uart(info, attached); | |
423 | break; | |
424 | 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; | |
b76668ba | 457 | default: |
f73f6232 CC |
458 | dev_err(info->dev, |
459 | "failed to detect %s unknown cable (type:0x%x)\n", | |
460 | attached ? "attached" : "detached", cable_type); | |
3cafbd4e | 461 | return -EINVAL; |
b76668ba | 462 | } |
99f09beb | 463 | |
3cafbd4e | 464 | return 0; |
99f09beb DK |
465 | } |
466 | ||
f73f6232 | 467 | static int max8997_muic_chg_handler(struct max8997_muic_info *info) |
99f09beb | 468 | { |
f73f6232 CC |
469 | int chg_type; |
470 | bool attached; | |
471 | int adc; | |
99f09beb | 472 | |
f73f6232 CC |
473 | chg_type = max8997_muic_get_cable_type(info, |
474 | MAX8997_CABLE_GROUP_CHG, &attached); | |
99f09beb | 475 | |
f73f6232 | 476 | switch (chg_type) { |
99f09beb | 477 | case MAX8997_CHARGER_TYPE_NONE: |
99f09beb DK |
478 | break; |
479 | case MAX8997_CHARGER_TYPE_USB: | |
f73f6232 CC |
480 | adc = info->status[0] & STATUS1_ADC_MASK; |
481 | adc >>= STATUS1_ADC_SHIFT; | |
482 | ||
483 | if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) { | |
99f09beb | 484 | max8997_muic_handle_usb(info, |
f73f6232 | 485 | MAX8997_USB_DEVICE, attached); |
99f09beb | 486 | } |
99f09beb DK |
487 | break; |
488 | case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT: | |
2a9de9c0 CC |
489 | extcon_set_cable_state_(info->edev, EXTCON_CHARGE_DOWNSTREAM, |
490 | attached); | |
b76668ba | 491 | break; |
99f09beb | 492 | case MAX8997_CHARGER_TYPE_DEDICATED_CHG: |
2a9de9c0 | 493 | extcon_set_cable_state_(info->edev, EXTCON_TA, attached); |
b76668ba | 494 | break; |
99f09beb | 495 | case MAX8997_CHARGER_TYPE_500MA: |
2a9de9c0 CC |
496 | extcon_set_cable_state_(info->edev, EXTCON_SLOW_CHARGER, |
497 | attached); | |
b76668ba | 498 | break; |
99f09beb | 499 | case MAX8997_CHARGER_TYPE_1A: |
2a9de9c0 CC |
500 | extcon_set_cable_state_(info->edev, EXTCON_FAST_CHARGER, |
501 | attached); | |
99f09beb DK |
502 | break; |
503 | default: | |
f73f6232 CC |
504 | 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; | |
99f09beb DK |
508 | } |
509 | ||
f73f6232 | 510 | return 0; |
99f09beb DK |
511 | } |
512 | ||
513 | static 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); | |
dca1a71e CC |
517 | int irq_type = 0; |
518 | int i, ret; | |
99f09beb | 519 | |
f73f6232 CC |
520 | if (!info->edev) |
521 | return; | |
522 | ||
99f09beb DK |
523 | mutex_lock(&info->mutex); |
524 | ||
ad07d8b4 | 525 | for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) |
f73f6232 CC |
526 | if (info->irq == muic_irqs[i].virq) |
527 | irq_type = muic_irqs[i].irq; | |
528 | ||
99f09beb | 529 | ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1, |
f73f6232 | 530 | 2, info->status); |
99f09beb DK |
531 | if (ret) { |
532 | dev_err(info->dev, "failed to read muic register\n"); | |
533 | mutex_unlock(&info->mutex); | |
534 | return; | |
535 | } | |
536 | ||
99f09beb | 537 | switch (irq_type) { |
f73f6232 CC |
538 | case MAX8997_MUICIRQ_ADCError: |
539 | case MAX8997_MUICIRQ_ADCLow: | |
99f09beb | 540 | case MAX8997_MUICIRQ_ADC: |
f73f6232 CC |
541 | /* Handle all of cable except for charger cable */ |
542 | ret = max8997_muic_adc_handler(info); | |
99f09beb | 543 | break; |
f73f6232 CC |
544 | case MAX8997_MUICIRQ_VBVolt: |
545 | case MAX8997_MUICIRQ_DBChg: | |
546 | case MAX8997_MUICIRQ_DCDTmr: | |
547 | case MAX8997_MUICIRQ_ChgDetRun: | |
99f09beb | 548 | case MAX8997_MUICIRQ_ChgTyp: |
f73f6232 CC |
549 | /* Handle charger cable */ |
550 | ret = max8997_muic_chg_handler(info); | |
551 | break; | |
552 | case MAX8997_MUICIRQ_OVP: | |
99f09beb DK |
553 | break; |
554 | default: | |
b76668ba CC |
555 | dev_info(info->dev, "misc interrupt: irq %d occurred\n", |
556 | irq_type); | |
f73f6232 CC |
557 | mutex_unlock(&info->mutex); |
558 | return; | |
99f09beb DK |
559 | } |
560 | ||
f73f6232 CC |
561 | if (ret < 0) |
562 | dev_err(info->dev, "failed to handle MUIC interrupt\n"); | |
563 | ||
99f09beb | 564 | mutex_unlock(&info->mutex); |
99f09beb DK |
565 | } |
566 | ||
567 | static 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 | ||
f73f6232 | 579 | static int max8997_muic_detect_dev(struct max8997_muic_info *info) |
99f09beb | 580 | { |
f73f6232 CC |
581 | int ret = 0; |
582 | int adc; | |
583 | int chg_type; | |
584 | bool attached; | |
99f09beb | 585 | |
f73f6232 CC |
586 | 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); | |
99f09beb | 591 | if (ret) { |
f73f6232 CC |
592 | dev_err(info->dev, "failed to read MUIC register\n"); |
593 | mutex_unlock(&info->mutex); | |
3ad9e86d | 594 | return ret; |
99f09beb DK |
595 | } |
596 | ||
f73f6232 CC |
597 | 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 | } | |
99f09beb | 607 | |
f73f6232 CC |
608 | 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 | } | |
99f09beb | 618 | |
f73f6232 | 619 | mutex_unlock(&info->mutex); |
99f09beb | 620 | |
f73f6232 | 621 | return 0; |
99f09beb DK |
622 | } |
623 | ||
af5eb1a1 CC |
624 | static 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) | |
6ed28105 | 632 | dev_err(info->dev, "failed to detect cable type\n"); |
af5eb1a1 CC |
633 | } |
634 | ||
44f34fd4 | 635 | static int max8997_muic_probe(struct platform_device *pdev) |
99f09beb | 636 | { |
b76668ba CC |
637 | struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent); |
638 | struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev); | |
99f09beb | 639 | struct max8997_muic_info *info; |
af5eb1a1 | 640 | int delay_jiffies; |
99f09beb DK |
641 | int ret, i; |
642 | ||
0b672e9b SK |
643 | info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info), |
644 | GFP_KERNEL); | |
0a16ee63 | 645 | if (!info) |
0b672e9b | 646 | return -ENOMEM; |
99f09beb | 647 | |
99f09beb | 648 | info->dev = &pdev->dev; |
b76668ba | 649 | info->muic = max8997->muic; |
99f09beb DK |
650 | |
651 | platform_set_drvdata(pdev, info); | |
652 | mutex_init(&info->mutex); | |
653 | ||
99f09beb DK |
654 | 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]; | |
68c9274d | 658 | unsigned int virq = 0; |
dca1a71e CC |
659 | |
660 | virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq); | |
68c9274d SK |
661 | if (!virq) { |
662 | ret = -EINVAL; | |
dca1a71e | 663 | goto err_irq; |
68c9274d | 664 | } |
dca1a71e | 665 | muic_irq->virq = virq; |
99f09beb | 666 | |
ae3b3215 CC |
667 | ret = request_threaded_irq(virq, NULL, |
668 | max8997_muic_irq_handler, | |
669 | IRQF_NO_SUSPEND, | |
670 | muic_irq->name, info); | |
99f09beb DK |
671 | if (ret) { |
672 | dev_err(&pdev->dev, | |
34825e51 | 673 | "failed: irq request (IRQ: %d, error :%d)\n", |
99f09beb | 674 | muic_irq->irq, ret); |
99f09beb DK |
675 | goto err_irq; |
676 | } | |
677 | } | |
678 | ||
b76668ba | 679 | /* External connector */ |
22f9afb9 CC |
680 | info->edev = devm_extcon_dev_allocate(&pdev->dev, max8997_extcon_cable); |
681 | if (IS_ERR(info->edev)) { | |
b76668ba CC |
682 | dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); |
683 | ret = -ENOMEM; | |
684 | goto err_irq; | |
685 | } | |
22f9afb9 | 686 | |
2923803d | 687 | ret = devm_extcon_dev_register(&pdev->dev, info->edev); |
b76668ba CC |
688 | if (ret) { |
689 | dev_err(&pdev->dev, "failed to register extcon device\n"); | |
0b672e9b | 690 | goto err_irq; |
b76668ba CC |
691 | } |
692 | ||
dfee4111 | 693 | if (pdata && pdata->muic_pdata) { |
810d601f CC |
694 | struct max8997_muic_platform_data *muic_pdata |
695 | = pdata->muic_pdata; | |
696 | ||
697 | /* 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); | |
b76668ba | 702 | } |
99f09beb | 703 | |
810d601f CC |
704 | /* |
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; | |
685dc9a7 | 712 | |
810d601f CC |
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 { | |
728 | info->path_uart = CONTROL1_SW_UART; | |
685dc9a7 | 729 | info->path_usb = CONTROL1_SW_USB; |
810d601f CC |
730 | delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); |
731 | } | |
685dc9a7 CC |
732 | |
733 | /* Set initial path for UART */ | |
734 | max8997_muic_set_path(info, info->path_uart, true); | |
735 | ||
027fcd50 CC |
736 | /* Set ADC debounce time */ |
737 | max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); | |
738 | ||
af5eb1a1 CC |
739 | /* |
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); | |
bf9509e0 KK |
748 | queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, |
749 | delay_jiffies); | |
99f09beb | 750 | |
af5eb1a1 | 751 | return 0; |
99f09beb DK |
752 | |
753 | err_irq: | |
3241d56e | 754 | while (--i >= 0) |
dca1a71e | 755 | free_irq(muic_irqs[i].virq, info); |
99f09beb DK |
756 | return ret; |
757 | } | |
758 | ||
93ed0327 | 759 | static int max8997_muic_remove(struct platform_device *pdev) |
99f09beb DK |
760 | { |
761 | struct max8997_muic_info *info = platform_get_drvdata(pdev); | |
99f09beb DK |
762 | int i; |
763 | ||
99f09beb | 764 | for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) |
dca1a71e | 765 | free_irq(muic_irqs[i].virq, info); |
71e58782 | 766 | cancel_work_sync(&info->irq_work); |
99f09beb | 767 | |
99f09beb DK |
768 | return 0; |
769 | } | |
770 | ||
771 | static struct platform_driver max8997_muic_driver = { | |
772 | .driver = { | |
b76668ba | 773 | .name = DEV_NAME, |
99f09beb DK |
774 | }, |
775 | .probe = max8997_muic_probe, | |
5f7e2228 | 776 | .remove = max8997_muic_remove, |
99f09beb DK |
777 | }; |
778 | ||
b00e126f | 779 | module_platform_driver(max8997_muic_driver); |
99f09beb | 780 | |
b76668ba | 781 | MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver"); |
99f09beb DK |
782 | MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>"); |
783 | MODULE_LICENSE("GPL"); |