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Commit | Line | Data |
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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" | |
99f09beb | 32 | |
027fcd50 CC |
33 | enum max8997_muic_adc_debounce_time { |
34 | ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */ | |
35 | ADC_DEBOUNCE_TIME_10MS, /* 10ms */ | |
36 | ADC_DEBOUNCE_TIME_25MS, /* 25ms */ | |
37 | ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */ | |
38 | }; | |
39 | ||
99f09beb DK |
40 | struct max8997_muic_irq { |
41 | unsigned int irq; | |
42 | const char *name; | |
dca1a71e | 43 | unsigned int virq; |
99f09beb DK |
44 | }; |
45 | ||
46 | static struct max8997_muic_irq muic_irqs[] = { | |
f73f6232 CC |
47 | { MAX8997_MUICIRQ_ADCError, "muic-ADCERROR" }, |
48 | { MAX8997_MUICIRQ_ADCLow, "muic-ADCLOW" }, | |
49 | { MAX8997_MUICIRQ_ADC, "muic-ADC" }, | |
50 | { MAX8997_MUICIRQ_VBVolt, "muic-VBVOLT" }, | |
51 | { MAX8997_MUICIRQ_DBChg, "muic-DBCHG" }, | |
52 | { MAX8997_MUICIRQ_DCDTmr, "muic-DCDTMR" }, | |
53 | { MAX8997_MUICIRQ_ChgDetRun, "muic-CHGDETRUN" }, | |
54 | { MAX8997_MUICIRQ_ChgTyp, "muic-CHGTYP" }, | |
55 | { MAX8997_MUICIRQ_OVP, "muic-OVP" }, | |
56 | }; | |
57 | ||
58 | /* Define supported cable type */ | |
59 | enum max8997_muic_acc_type { | |
60 | MAX8997_MUIC_ADC_GROUND = 0x0, | |
61 | MAX8997_MUIC_ADC_MHL, /* MHL*/ | |
62 | MAX8997_MUIC_ADC_REMOTE_S1_BUTTON, | |
63 | MAX8997_MUIC_ADC_REMOTE_S2_BUTTON, | |
64 | MAX8997_MUIC_ADC_REMOTE_S3_BUTTON, | |
65 | MAX8997_MUIC_ADC_REMOTE_S4_BUTTON, | |
66 | MAX8997_MUIC_ADC_REMOTE_S5_BUTTON, | |
67 | MAX8997_MUIC_ADC_REMOTE_S6_BUTTON, | |
68 | MAX8997_MUIC_ADC_REMOTE_S7_BUTTON, | |
69 | MAX8997_MUIC_ADC_REMOTE_S8_BUTTON, | |
70 | MAX8997_MUIC_ADC_REMOTE_S9_BUTTON, | |
71 | MAX8997_MUIC_ADC_REMOTE_S10_BUTTON, | |
72 | MAX8997_MUIC_ADC_REMOTE_S11_BUTTON, | |
73 | MAX8997_MUIC_ADC_REMOTE_S12_BUTTON, | |
74 | MAX8997_MUIC_ADC_RESERVED_ACC_1, | |
75 | MAX8997_MUIC_ADC_RESERVED_ACC_2, | |
76 | MAX8997_MUIC_ADC_RESERVED_ACC_3, | |
77 | MAX8997_MUIC_ADC_RESERVED_ACC_4, | |
78 | MAX8997_MUIC_ADC_RESERVED_ACC_5, | |
79 | MAX8997_MUIC_ADC_CEA936_AUDIO, | |
80 | MAX8997_MUIC_ADC_PHONE_POWERED_DEV, | |
81 | MAX8997_MUIC_ADC_TTY_CONVERTER, | |
82 | MAX8997_MUIC_ADC_UART_CABLE, | |
83 | MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG, | |
84 | MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF, /* JIG-USB-OFF */ | |
85 | MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON, /* JIG-USB-ON */ | |
86 | MAX8997_MUIC_ADC_AV_CABLE_NOLOAD, /* DESKDOCK */ | |
87 | MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG, | |
88 | MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF, /* JIG-UART */ | |
89 | MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON, /* CARDOCK */ | |
90 | MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE, | |
91 | MAX8997_MUIC_ADC_OPEN, /* OPEN */ | |
92 | }; | |
93 | ||
94 | enum max8997_muic_cable_group { | |
95 | MAX8997_CABLE_GROUP_ADC = 0, | |
96 | MAX8997_CABLE_GROUP_ADC_GND, | |
97 | MAX8997_CABLE_GROUP_CHG, | |
98 | MAX8997_CABLE_GROUP_VBVOLT, | |
99 | }; | |
100 | ||
101 | enum max8997_muic_usb_type { | |
102 | MAX8997_USB_HOST, | |
103 | MAX8997_USB_DEVICE, | |
104 | }; | |
105 | ||
106 | enum max8997_muic_charger_type { | |
107 | MAX8997_CHARGER_TYPE_NONE = 0, | |
108 | MAX8997_CHARGER_TYPE_USB, | |
109 | MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT, | |
110 | MAX8997_CHARGER_TYPE_DEDICATED_CHG, | |
111 | MAX8997_CHARGER_TYPE_500MA, | |
112 | MAX8997_CHARGER_TYPE_1A, | |
113 | MAX8997_CHARGER_TYPE_DEAD_BATTERY = 7, | |
99f09beb DK |
114 | }; |
115 | ||
116 | struct max8997_muic_info { | |
117 | struct device *dev; | |
99f09beb | 118 | struct i2c_client *muic; |
f73f6232 CC |
119 | struct extcon_dev *edev; |
120 | int prev_cable_type; | |
121 | int prev_chg_type; | |
122 | u8 status[2]; | |
99f09beb DK |
123 | |
124 | int irq; | |
125 | struct work_struct irq_work; | |
99f09beb | 126 | struct mutex mutex; |
b76668ba | 127 | |
f73f6232 CC |
128 | struct max8997_muic_platform_data *muic_pdata; |
129 | enum max8997_muic_charger_type pre_charger_type; | |
685dc9a7 CC |
130 | |
131 | /* | |
132 | * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB | |
133 | * h/w path of COMP2/COMN1 on CONTROL1 register. | |
134 | */ | |
135 | int path_usb; | |
136 | int path_uart; | |
b76668ba CC |
137 | }; |
138 | ||
e3e5bc02 CC |
139 | enum { |
140 | EXTCON_CABLE_USB = 0, | |
141 | EXTCON_CABLE_USB_HOST, | |
142 | EXTCON_CABLE_TA, | |
143 | EXTCON_CABLE_FAST_CHARGER, | |
144 | EXTCON_CABLE_SLOW_CHARGER, | |
145 | EXTCON_CABLE_CHARGE_DOWNSTREAM, | |
146 | EXTCON_CABLE_MHL, | |
147 | EXTCON_CABLE_DOCK_DESK, | |
148 | EXTCON_CABLE_DOCK_CARD, | |
149 | EXTCON_CABLE_JIG, | |
150 | ||
151 | _EXTCON_CABLE_NUM, | |
152 | }; | |
153 | ||
cae93db3 | 154 | static const char *max8997_extcon_cable[] = { |
e3e5bc02 CC |
155 | [EXTCON_CABLE_USB] = "USB", |
156 | [EXTCON_CABLE_USB_HOST] = "USB-Host", | |
157 | [EXTCON_CABLE_TA] = "TA", | |
158 | [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger", | |
159 | [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger", | |
160 | [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream", | |
161 | [EXTCON_CABLE_MHL] = "MHL", | |
162 | [EXTCON_CABLE_DOCK_DESK] = "Dock-Desk", | |
163 | [EXTCON_CABLE_DOCK_CARD] = "Dock-Card", | |
164 | [EXTCON_CABLE_JIG] = "JIG", | |
b76668ba CC |
165 | |
166 | NULL, | |
99f09beb DK |
167 | }; |
168 | ||
027fcd50 CC |
169 | /* |
170 | * max8997_muic_set_debounce_time - Set the debounce time of ADC | |
171 | * @info: the instance including private data of max8997 MUIC | |
172 | * @time: the debounce time of ADC | |
173 | */ | |
174 | static int max8997_muic_set_debounce_time(struct max8997_muic_info *info, | |
175 | enum max8997_muic_adc_debounce_time time) | |
176 | { | |
177 | int ret; | |
178 | ||
179 | switch (time) { | |
180 | case ADC_DEBOUNCE_TIME_0_5MS: | |
181 | case ADC_DEBOUNCE_TIME_10MS: | |
182 | case ADC_DEBOUNCE_TIME_25MS: | |
183 | case ADC_DEBOUNCE_TIME_38_62MS: | |
184 | ret = max8997_update_reg(info->muic, | |
185 | MAX8997_MUIC_REG_CONTROL3, | |
186 | time << CONTROL3_ADCDBSET_SHIFT, | |
187 | CONTROL3_ADCDBSET_MASK); | |
188 | if (ret) { | |
189 | dev_err(info->dev, "failed to set ADC debounce time\n"); | |
190 | return -EAGAIN; | |
191 | } | |
192 | break; | |
193 | default: | |
194 | dev_err(info->dev, "invalid ADC debounce time\n"); | |
195 | return -EINVAL; | |
196 | } | |
197 | ||
198 | return 0; | |
199 | }; | |
200 | ||
07c70503 CC |
201 | /* |
202 | * max8997_muic_set_path - Set hardware line according to attached cable | |
203 | * @info: the instance including private data of max8997 MUIC | |
204 | * @value: the path according to attached cable | |
205 | * @attached: the state of cable (true:attached, false:detached) | |
206 | * | |
207 | * The max8997 MUIC device share outside H/W line among a varity of cables, | |
208 | * so this function set internal path of H/W line according to the type of | |
209 | * attached cable. | |
210 | */ | |
211 | static int max8997_muic_set_path(struct max8997_muic_info *info, | |
212 | u8 val, bool attached) | |
213 | { | |
214 | int ret = 0; | |
215 | u8 ctrl1, ctrl2 = 0; | |
216 | ||
217 | if (attached) | |
218 | ctrl1 = val; | |
219 | else | |
220 | ctrl1 = CONTROL1_SW_OPEN; | |
221 | ||
222 | ret = max8997_update_reg(info->muic, | |
223 | MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK); | |
224 | if (ret < 0) { | |
225 | dev_err(info->dev, "failed to update MUIC register\n"); | |
226 | return -EAGAIN; | |
227 | } | |
228 | ||
229 | if (attached) | |
230 | ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ | |
231 | else | |
232 | ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ | |
233 | ||
234 | ret = max8997_update_reg(info->muic, | |
235 | MAX8997_MUIC_REG_CONTROL2, ctrl2, | |
236 | CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK); | |
237 | if (ret < 0) { | |
238 | dev_err(info->dev, "failed to update MUIC register\n"); | |
239 | return -EAGAIN; | |
240 | } | |
241 | ||
242 | dev_info(info->dev, | |
243 | "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", | |
244 | ctrl1, ctrl2, attached ? "attached" : "detached"); | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
f73f6232 CC |
249 | /* |
250 | * max8997_muic_get_cable_type - Return cable type and check cable state | |
251 | * @info: the instance including private data of max8997 MUIC | |
252 | * @group: the path according to attached cable | |
253 | * @attached: store cable state and return | |
254 | * | |
255 | * This function check the cable state either attached or detached, | |
256 | * and then divide precise type of cable according to cable group. | |
257 | * - MAX8997_CABLE_GROUP_ADC | |
258 | * - MAX8997_CABLE_GROUP_CHG | |
259 | */ | |
260 | static int max8997_muic_get_cable_type(struct max8997_muic_info *info, | |
261 | enum max8997_muic_cable_group group, bool *attached) | |
262 | { | |
263 | int cable_type = 0; | |
264 | int adc; | |
265 | int chg_type; | |
266 | ||
267 | switch (group) { | |
268 | case MAX8997_CABLE_GROUP_ADC: | |
269 | /* | |
270 | * Read ADC value to check cable type and decide cable state | |
271 | * according to cable type | |
272 | */ | |
273 | adc = info->status[0] & STATUS1_ADC_MASK; | |
274 | adc >>= STATUS1_ADC_SHIFT; | |
275 | ||
276 | /* | |
277 | * Check current cable state/cable type and store cable type | |
278 | * (info->prev_cable_type) for handling cable when cable is | |
279 | * detached. | |
280 | */ | |
281 | if (adc == MAX8997_MUIC_ADC_OPEN) { | |
282 | *attached = false; | |
283 | ||
284 | cable_type = info->prev_cable_type; | |
285 | info->prev_cable_type = MAX8997_MUIC_ADC_OPEN; | |
286 | } else { | |
287 | *attached = true; | |
288 | ||
289 | cable_type = info->prev_cable_type = adc; | |
290 | } | |
291 | break; | |
292 | case MAX8997_CABLE_GROUP_CHG: | |
293 | /* | |
294 | * Read charger type to check cable type and decide cable state | |
295 | * according to type of charger cable. | |
296 | */ | |
297 | chg_type = info->status[1] & STATUS2_CHGTYP_MASK; | |
298 | chg_type >>= STATUS2_CHGTYP_SHIFT; | |
299 | ||
300 | if (chg_type == MAX8997_CHARGER_TYPE_NONE) { | |
301 | *attached = false; | |
302 | ||
303 | cable_type = info->prev_chg_type; | |
304 | info->prev_chg_type = MAX8997_CHARGER_TYPE_NONE; | |
305 | } else { | |
306 | *attached = true; | |
307 | ||
308 | /* | |
309 | * Check current cable state/cable type and store cable | |
310 | * type(info->prev_chg_type) for handling cable when | |
311 | * charger cable is detached. | |
312 | */ | |
313 | cable_type = info->prev_chg_type = chg_type; | |
314 | } | |
315 | ||
316 | break; | |
317 | default: | |
318 | dev_err(info->dev, "Unknown cable group (%d)\n", group); | |
319 | cable_type = -EINVAL; | |
320 | break; | |
321 | } | |
322 | ||
323 | return cable_type; | |
324 | } | |
325 | ||
99f09beb DK |
326 | static int max8997_muic_handle_usb(struct max8997_muic_info *info, |
327 | enum max8997_muic_usb_type usb_type, bool attached) | |
328 | { | |
99f09beb DK |
329 | int ret = 0; |
330 | ||
331 | if (usb_type == MAX8997_USB_HOST) { | |
685dc9a7 | 332 | ret = max8997_muic_set_path(info, info->path_usb, attached); |
f73f6232 | 333 | if (ret < 0) { |
99f09beb | 334 | dev_err(info->dev, "failed to update muic register\n"); |
f73f6232 | 335 | return ret; |
99f09beb DK |
336 | } |
337 | } | |
338 | ||
b76668ba CC |
339 | switch (usb_type) { |
340 | case MAX8997_USB_HOST: | |
341 | extcon_set_cable_state(info->edev, "USB-Host", attached); | |
342 | break; | |
343 | case MAX8997_USB_DEVICE: | |
344 | extcon_set_cable_state(info->edev, "USB", attached); | |
345 | break; | |
346 | default: | |
f73f6232 CC |
347 | dev_err(info->dev, "failed to detect %s usb cable\n", |
348 | attached ? "attached" : "detached"); | |
349 | return -EINVAL; | |
b76668ba CC |
350 | } |
351 | ||
f73f6232 | 352 | return 0; |
99f09beb DK |
353 | } |
354 | ||
99f09beb | 355 | static int max8997_muic_handle_dock(struct max8997_muic_info *info, |
f73f6232 | 356 | int cable_type, bool attached) |
99f09beb | 357 | { |
99f09beb DK |
358 | int ret = 0; |
359 | ||
07c70503 | 360 | ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached); |
99f09beb DK |
361 | if (ret) { |
362 | dev_err(info->dev, "failed to update muic register\n"); | |
f73f6232 | 363 | return ret; |
99f09beb DK |
364 | } |
365 | ||
f73f6232 CC |
366 | switch (cable_type) { |
367 | case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD: | |
b76668ba | 368 | extcon_set_cable_state(info->edev, "Dock-desk", attached); |
99f09beb | 369 | break; |
f73f6232 | 370 | case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON: |
b76668ba | 371 | extcon_set_cable_state(info->edev, "Dock-card", attached); |
99f09beb DK |
372 | break; |
373 | default: | |
f73f6232 CC |
374 | dev_err(info->dev, "failed to detect %s dock device\n", |
375 | attached ? "attached" : "detached"); | |
376 | return -EINVAL; | |
99f09beb | 377 | } |
f73f6232 CC |
378 | |
379 | return 0; | |
99f09beb DK |
380 | } |
381 | ||
382 | static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info, | |
383 | bool attached) | |
384 | { | |
99f09beb DK |
385 | int ret = 0; |
386 | ||
387 | /* switch to UART */ | |
685dc9a7 | 388 | ret = max8997_muic_set_path(info, info->path_uart, attached); |
99f09beb DK |
389 | if (ret) { |
390 | dev_err(info->dev, "failed to update muic register\n"); | |
f73f6232 | 391 | return -EINVAL; |
99f09beb DK |
392 | } |
393 | ||
b76668ba | 394 | extcon_set_cable_state(info->edev, "JIG", attached); |
99f09beb | 395 | |
f73f6232 | 396 | return 0; |
99f09beb DK |
397 | } |
398 | ||
f73f6232 | 399 | static int max8997_muic_adc_handler(struct max8997_muic_info *info) |
99f09beb | 400 | { |
f73f6232 CC |
401 | int cable_type; |
402 | bool attached; | |
99f09beb DK |
403 | int ret = 0; |
404 | ||
f73f6232 CC |
405 | /* Check cable state which is either detached or attached */ |
406 | cable_type = max8997_muic_get_cable_type(info, | |
407 | MAX8997_CABLE_GROUP_ADC, &attached); | |
408 | ||
409 | switch (cable_type) { | |
410 | case MAX8997_MUIC_ADC_GROUND: | |
411 | ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, attached); | |
412 | if (ret < 0) | |
413 | return ret; | |
414 | break; | |
415 | case MAX8997_MUIC_ADC_MHL: | |
416 | extcon_set_cable_state(info->edev, "MHL", attached); | |
417 | break; | |
418 | case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
419 | case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON: | |
420 | ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, attached); | |
421 | if (ret < 0) | |
422 | return ret; | |
423 | break; | |
424 | case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD: | |
425 | case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON: | |
426 | ret = max8997_muic_handle_dock(info, cable_type, attached); | |
427 | if (ret < 0) | |
428 | return ret; | |
429 | break; | |
430 | case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
431 | ret = max8997_muic_handle_jig_uart(info, attached); | |
432 | break; | |
433 | case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON: | |
434 | case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON: | |
435 | case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON: | |
436 | case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON: | |
437 | case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON: | |
438 | case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON: | |
439 | case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON: | |
440 | case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON: | |
441 | case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON: | |
442 | case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON: | |
443 | case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON: | |
444 | case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON: | |
445 | case MAX8997_MUIC_ADC_RESERVED_ACC_1: | |
446 | case MAX8997_MUIC_ADC_RESERVED_ACC_2: | |
447 | case MAX8997_MUIC_ADC_RESERVED_ACC_3: | |
448 | case MAX8997_MUIC_ADC_RESERVED_ACC_4: | |
449 | case MAX8997_MUIC_ADC_RESERVED_ACC_5: | |
450 | case MAX8997_MUIC_ADC_CEA936_AUDIO: | |
451 | case MAX8997_MUIC_ADC_PHONE_POWERED_DEV: | |
452 | case MAX8997_MUIC_ADC_TTY_CONVERTER: | |
453 | case MAX8997_MUIC_ADC_UART_CABLE: | |
454 | case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG: | |
455 | case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG: | |
456 | case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE: | |
457 | /* | |
458 | * This cable isn't used in general case if it is specially | |
459 | * needed to detect additional cable, should implement | |
460 | * proper operation when this cable is attached/detached. | |
461 | */ | |
462 | dev_info(info->dev, | |
463 | "cable is %s but it isn't used (type:0x%x)\n", | |
464 | attached ? "attached" : "detached", cable_type); | |
465 | return -EAGAIN; | |
b76668ba | 466 | default: |
f73f6232 CC |
467 | dev_err(info->dev, |
468 | "failed to detect %s unknown cable (type:0x%x)\n", | |
469 | attached ? "attached" : "detached", cable_type); | |
3cafbd4e | 470 | return -EINVAL; |
b76668ba | 471 | } |
99f09beb | 472 | |
3cafbd4e | 473 | return 0; |
99f09beb DK |
474 | } |
475 | ||
f73f6232 | 476 | static int max8997_muic_chg_handler(struct max8997_muic_info *info) |
99f09beb | 477 | { |
f73f6232 CC |
478 | int chg_type; |
479 | bool attached; | |
480 | int adc; | |
99f09beb | 481 | |
f73f6232 CC |
482 | chg_type = max8997_muic_get_cable_type(info, |
483 | MAX8997_CABLE_GROUP_CHG, &attached); | |
99f09beb | 484 | |
f73f6232 | 485 | switch (chg_type) { |
99f09beb | 486 | case MAX8997_CHARGER_TYPE_NONE: |
99f09beb DK |
487 | break; |
488 | case MAX8997_CHARGER_TYPE_USB: | |
f73f6232 CC |
489 | adc = info->status[0] & STATUS1_ADC_MASK; |
490 | adc >>= STATUS1_ADC_SHIFT; | |
491 | ||
492 | if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) { | |
99f09beb | 493 | max8997_muic_handle_usb(info, |
f73f6232 | 494 | MAX8997_USB_DEVICE, attached); |
99f09beb | 495 | } |
99f09beb DK |
496 | break; |
497 | case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT: | |
f73f6232 | 498 | extcon_set_cable_state(info->edev, "Charge-downstream", attached); |
b76668ba | 499 | break; |
99f09beb | 500 | case MAX8997_CHARGER_TYPE_DEDICATED_CHG: |
f73f6232 | 501 | extcon_set_cable_state(info->edev, "TA", attached); |
b76668ba | 502 | break; |
99f09beb | 503 | case MAX8997_CHARGER_TYPE_500MA: |
f73f6232 | 504 | extcon_set_cable_state(info->edev, "Slow-charger", attached); |
b76668ba | 505 | break; |
99f09beb | 506 | case MAX8997_CHARGER_TYPE_1A: |
f73f6232 | 507 | extcon_set_cable_state(info->edev, "Fast-charger", attached); |
99f09beb DK |
508 | break; |
509 | default: | |
f73f6232 CC |
510 | dev_err(info->dev, |
511 | "failed to detect %s unknown chg cable (type:0x%x)\n", | |
512 | attached ? "attached" : "detached", chg_type); | |
513 | return -EINVAL; | |
99f09beb DK |
514 | } |
515 | ||
f73f6232 | 516 | return 0; |
99f09beb DK |
517 | } |
518 | ||
519 | static void max8997_muic_irq_work(struct work_struct *work) | |
520 | { | |
521 | struct max8997_muic_info *info = container_of(work, | |
522 | struct max8997_muic_info, irq_work); | |
dca1a71e CC |
523 | int irq_type = 0; |
524 | int i, ret; | |
99f09beb | 525 | |
f73f6232 CC |
526 | if (!info->edev) |
527 | return; | |
528 | ||
99f09beb DK |
529 | mutex_lock(&info->mutex); |
530 | ||
f73f6232 CC |
531 | for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++) |
532 | if (info->irq == muic_irqs[i].virq) | |
533 | irq_type = muic_irqs[i].irq; | |
534 | ||
99f09beb | 535 | ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1, |
f73f6232 | 536 | 2, info->status); |
99f09beb DK |
537 | if (ret) { |
538 | dev_err(info->dev, "failed to read muic register\n"); | |
539 | mutex_unlock(&info->mutex); | |
540 | return; | |
541 | } | |
542 | ||
99f09beb | 543 | switch (irq_type) { |
f73f6232 CC |
544 | case MAX8997_MUICIRQ_ADCError: |
545 | case MAX8997_MUICIRQ_ADCLow: | |
99f09beb | 546 | case MAX8997_MUICIRQ_ADC: |
f73f6232 CC |
547 | /* Handle all of cable except for charger cable */ |
548 | ret = max8997_muic_adc_handler(info); | |
99f09beb | 549 | break; |
f73f6232 CC |
550 | case MAX8997_MUICIRQ_VBVolt: |
551 | case MAX8997_MUICIRQ_DBChg: | |
552 | case MAX8997_MUICIRQ_DCDTmr: | |
553 | case MAX8997_MUICIRQ_ChgDetRun: | |
99f09beb | 554 | case MAX8997_MUICIRQ_ChgTyp: |
f73f6232 CC |
555 | /* Handle charger cable */ |
556 | ret = max8997_muic_chg_handler(info); | |
557 | break; | |
558 | case MAX8997_MUICIRQ_OVP: | |
99f09beb DK |
559 | break; |
560 | default: | |
b76668ba CC |
561 | dev_info(info->dev, "misc interrupt: irq %d occurred\n", |
562 | irq_type); | |
f73f6232 CC |
563 | mutex_unlock(&info->mutex); |
564 | return; | |
99f09beb DK |
565 | } |
566 | ||
f73f6232 CC |
567 | if (ret < 0) |
568 | dev_err(info->dev, "failed to handle MUIC interrupt\n"); | |
569 | ||
99f09beb DK |
570 | mutex_unlock(&info->mutex); |
571 | ||
572 | return; | |
573 | } | |
574 | ||
575 | static irqreturn_t max8997_muic_irq_handler(int irq, void *data) | |
576 | { | |
577 | struct max8997_muic_info *info = data; | |
578 | ||
579 | dev_dbg(info->dev, "irq:%d\n", irq); | |
580 | info->irq = irq; | |
581 | ||
582 | schedule_work(&info->irq_work); | |
583 | ||
584 | return IRQ_HANDLED; | |
585 | } | |
586 | ||
f73f6232 | 587 | static int max8997_muic_detect_dev(struct max8997_muic_info *info) |
99f09beb | 588 | { |
f73f6232 CC |
589 | int ret = 0; |
590 | int adc; | |
591 | int chg_type; | |
592 | bool attached; | |
99f09beb | 593 | |
f73f6232 CC |
594 | mutex_lock(&info->mutex); |
595 | ||
596 | /* Read STATUSx register to detect accessory */ | |
597 | ret = max8997_bulk_read(info->muic, | |
598 | MAX8997_MUIC_REG_STATUS1, 2, info->status); | |
99f09beb | 599 | if (ret) { |
f73f6232 CC |
600 | dev_err(info->dev, "failed to read MUIC register\n"); |
601 | mutex_unlock(&info->mutex); | |
602 | return -EINVAL; | |
99f09beb DK |
603 | } |
604 | ||
f73f6232 CC |
605 | adc = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC, |
606 | &attached); | |
607 | if (attached && adc != MAX8997_MUIC_ADC_OPEN) { | |
608 | ret = max8997_muic_adc_handler(info); | |
609 | if (ret < 0) { | |
610 | dev_err(info->dev, "Cannot detect ADC cable\n"); | |
611 | mutex_unlock(&info->mutex); | |
612 | return ret; | |
613 | } | |
614 | } | |
99f09beb | 615 | |
f73f6232 CC |
616 | chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG, |
617 | &attached); | |
618 | if (attached && chg_type != MAX8997_CHARGER_TYPE_NONE) { | |
619 | ret = max8997_muic_chg_handler(info); | |
620 | if (ret < 0) { | |
621 | dev_err(info->dev, "Cannot detect charger cable\n"); | |
622 | mutex_unlock(&info->mutex); | |
623 | return ret; | |
624 | } | |
625 | } | |
99f09beb | 626 | |
f73f6232 | 627 | mutex_unlock(&info->mutex); |
99f09beb | 628 | |
f73f6232 | 629 | return 0; |
99f09beb DK |
630 | } |
631 | ||
44f34fd4 | 632 | static int max8997_muic_probe(struct platform_device *pdev) |
99f09beb | 633 | { |
b76668ba CC |
634 | struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent); |
635 | struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev); | |
99f09beb DK |
636 | struct max8997_muic_info *info; |
637 | int ret, i; | |
638 | ||
0b672e9b SK |
639 | info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info), |
640 | GFP_KERNEL); | |
99f09beb DK |
641 | if (!info) { |
642 | dev_err(&pdev->dev, "failed to allocate memory\n"); | |
0b672e9b | 643 | return -ENOMEM; |
99f09beb DK |
644 | } |
645 | ||
99f09beb | 646 | info->dev = &pdev->dev; |
b76668ba | 647 | info->muic = max8997->muic; |
99f09beb DK |
648 | |
649 | platform_set_drvdata(pdev, info); | |
650 | mutex_init(&info->mutex); | |
651 | ||
99f09beb DK |
652 | INIT_WORK(&info->irq_work, max8997_muic_irq_work); |
653 | ||
654 | for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) { | |
655 | struct max8997_muic_irq *muic_irq = &muic_irqs[i]; | |
68c9274d | 656 | unsigned int virq = 0; |
dca1a71e CC |
657 | |
658 | virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq); | |
68c9274d SK |
659 | if (!virq) { |
660 | ret = -EINVAL; | |
dca1a71e | 661 | goto err_irq; |
68c9274d | 662 | } |
dca1a71e | 663 | muic_irq->virq = virq; |
99f09beb | 664 | |
ae3b3215 CC |
665 | ret = request_threaded_irq(virq, NULL, |
666 | max8997_muic_irq_handler, | |
667 | IRQF_NO_SUSPEND, | |
668 | muic_irq->name, info); | |
99f09beb DK |
669 | if (ret) { |
670 | dev_err(&pdev->dev, | |
671 | "failed: irq request (IRQ: %d," | |
672 | " error :%d)\n", | |
673 | muic_irq->irq, ret); | |
99f09beb DK |
674 | goto err_irq; |
675 | } | |
676 | } | |
677 | ||
b76668ba | 678 | /* External connector */ |
0b672e9b SK |
679 | info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev), |
680 | GFP_KERNEL); | |
b76668ba CC |
681 | if (!info->edev) { |
682 | dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); | |
683 | ret = -ENOMEM; | |
684 | goto err_irq; | |
685 | } | |
686 | info->edev->name = DEV_NAME; | |
687 | info->edev->supported_cable = max8997_extcon_cable; | |
688 | ret = extcon_dev_register(info->edev, NULL); | |
689 | if (ret) { | |
690 | dev_err(&pdev->dev, "failed to register extcon device\n"); | |
0b672e9b | 691 | goto err_irq; |
b76668ba CC |
692 | } |
693 | ||
99f09beb | 694 | /* Initialize registers according to platform data */ |
b76668ba CC |
695 | if (pdata->muic_pdata) { |
696 | struct max8997_muic_platform_data *mdata = info->muic_pdata; | |
697 | ||
698 | for (i = 0; i < mdata->num_init_data; i++) { | |
699 | max8997_write_reg(info->muic, mdata->init_data[i].addr, | |
700 | mdata->init_data[i].data); | |
701 | } | |
702 | } | |
99f09beb | 703 | |
685dc9a7 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 (pdata->muic_pdata->path_uart) | |
709 | info->path_uart = pdata->muic_pdata->path_uart; | |
710 | else | |
711 | info->path_uart = CONTROL1_SW_UART; | |
712 | ||
713 | if (pdata->muic_pdata->path_usb) | |
714 | info->path_usb = pdata->muic_pdata->path_usb; | |
715 | else | |
716 | info->path_usb = CONTROL1_SW_USB; | |
717 | ||
718 | /* Set initial path for UART */ | |
719 | max8997_muic_set_path(info, info->path_uart, true); | |
720 | ||
027fcd50 CC |
721 | /* Set ADC debounce time */ |
722 | max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); | |
723 | ||
99f09beb | 724 | /* Initial device detection */ |
f73f6232 CC |
725 | ret = max8997_muic_detect_dev(info); |
726 | if (ret < 0) { | |
727 | dev_err(&pdev->dev, "failed to detect cable type\n"); | |
728 | goto err_extcon; | |
729 | } | |
99f09beb DK |
730 | |
731 | return ret; | |
732 | ||
f73f6232 CC |
733 | err_extcon: |
734 | extcon_dev_unregister(info->edev); | |
99f09beb | 735 | err_irq: |
3241d56e | 736 | while (--i >= 0) |
dca1a71e | 737 | free_irq(muic_irqs[i].virq, info); |
99f09beb DK |
738 | return ret; |
739 | } | |
740 | ||
93ed0327 | 741 | static int max8997_muic_remove(struct platform_device *pdev) |
99f09beb DK |
742 | { |
743 | struct max8997_muic_info *info = platform_get_drvdata(pdev); | |
99f09beb DK |
744 | int i; |
745 | ||
99f09beb | 746 | for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) |
dca1a71e | 747 | free_irq(muic_irqs[i].virq, info); |
71e58782 | 748 | cancel_work_sync(&info->irq_work); |
99f09beb | 749 | |
b76668ba CC |
750 | extcon_dev_unregister(info->edev); |
751 | ||
99f09beb DK |
752 | return 0; |
753 | } | |
754 | ||
755 | static struct platform_driver max8997_muic_driver = { | |
756 | .driver = { | |
b76668ba | 757 | .name = DEV_NAME, |
99f09beb DK |
758 | .owner = THIS_MODULE, |
759 | }, | |
760 | .probe = max8997_muic_probe, | |
5f7e2228 | 761 | .remove = max8997_muic_remove, |
99f09beb DK |
762 | }; |
763 | ||
b00e126f | 764 | module_platform_driver(max8997_muic_driver); |
99f09beb | 765 | |
b76668ba | 766 | MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver"); |
99f09beb DK |
767 | MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>"); |
768 | MODULE_LICENSE("GPL"); |