Commit | Line | Data |
---|---|---|
962e56bf CC |
1 | /* |
2 | * extcon-max14577.c - MAX14577 extcon driver to support MAX14577 MUIC | |
3 | * | |
4 | * Copyright (C) 2013 Samsung Electrnoics | |
5 | * Chanwoo Choi <cw00.choi@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. | |
16 | */ | |
17 | ||
18 | #include <linux/kernel.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/i2c.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/mfd/max14577.h> | |
24 | #include <linux/mfd/max14577-private.h> | |
25 | #include <linux/extcon.h> | |
26 | ||
962e56bf CC |
27 | #define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ |
28 | ||
29 | enum max14577_muic_adc_debounce_time { | |
30 | ADC_DEBOUNCE_TIME_5MS = 0, | |
31 | ADC_DEBOUNCE_TIME_10MS, | |
32 | ADC_DEBOUNCE_TIME_25MS, | |
33 | ADC_DEBOUNCE_TIME_38_62MS, | |
34 | }; | |
35 | ||
36 | enum max14577_muic_status { | |
37 | MAX14577_MUIC_STATUS1 = 0, | |
38 | MAX14577_MUIC_STATUS2 = 1, | |
39 | MAX14577_MUIC_STATUS_END, | |
40 | }; | |
41 | ||
42 | struct max14577_muic_info { | |
43 | struct device *dev; | |
44 | struct max14577 *max14577; | |
45 | struct extcon_dev *edev; | |
46 | int prev_cable_type; | |
47 | int prev_chg_type; | |
48 | u8 status[MAX14577_MUIC_STATUS_END]; | |
49 | ||
50 | bool irq_adc; | |
51 | bool irq_chg; | |
52 | struct work_struct irq_work; | |
53 | struct mutex mutex; | |
54 | ||
55 | /* | |
56 | * Use delayed workqueue to detect cable state and then | |
57 | * notify cable state to notifiee/platform through uevent. | |
58 | * After completing the booting of platform, the extcon provider | |
59 | * driver should notify cable state to upper layer. | |
60 | */ | |
61 | struct delayed_work wq_detcable; | |
62 | ||
63 | /* | |
64 | * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB | |
65 | * h/w path of COMP2/COMN1 on CONTROL1 register. | |
66 | */ | |
67 | int path_usb; | |
68 | int path_uart; | |
69 | }; | |
70 | ||
71 | enum max14577_muic_cable_group { | |
72 | MAX14577_CABLE_GROUP_ADC = 0, | |
73 | MAX14577_CABLE_GROUP_CHG, | |
74 | }; | |
75 | ||
76 | /** | |
77 | * struct max14577_muic_irq | |
78 | * @irq: the index of irq list of MUIC device. | |
79 | * @name: the name of irq. | |
80 | * @virq: the virtual irq to use irq domain | |
81 | */ | |
82 | struct max14577_muic_irq { | |
83 | unsigned int irq; | |
84 | const char *name; | |
85 | unsigned int virq; | |
86 | }; | |
87 | ||
2b1d18f1 | 88 | static struct max14577_muic_irq max14577_muic_irqs[] = { |
962e56bf CC |
89 | { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, |
90 | { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, | |
91 | { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, | |
92 | { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, | |
93 | { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, | |
94 | { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, | |
95 | { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, | |
96 | { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, | |
97 | }; | |
98 | ||
99 | /* Define supported accessory type */ | |
100 | enum max14577_muic_acc_type { | |
101 | MAX14577_MUIC_ADC_GROUND = 0x0, | |
102 | MAX14577_MUIC_ADC_SEND_END_BUTTON, | |
103 | MAX14577_MUIC_ADC_REMOTE_S1_BUTTON, | |
104 | MAX14577_MUIC_ADC_REMOTE_S2_BUTTON, | |
105 | MAX14577_MUIC_ADC_REMOTE_S3_BUTTON, | |
106 | MAX14577_MUIC_ADC_REMOTE_S4_BUTTON, | |
107 | MAX14577_MUIC_ADC_REMOTE_S5_BUTTON, | |
108 | MAX14577_MUIC_ADC_REMOTE_S6_BUTTON, | |
109 | MAX14577_MUIC_ADC_REMOTE_S7_BUTTON, | |
110 | MAX14577_MUIC_ADC_REMOTE_S8_BUTTON, | |
111 | MAX14577_MUIC_ADC_REMOTE_S9_BUTTON, | |
112 | MAX14577_MUIC_ADC_REMOTE_S10_BUTTON, | |
113 | MAX14577_MUIC_ADC_REMOTE_S11_BUTTON, | |
114 | MAX14577_MUIC_ADC_REMOTE_S12_BUTTON, | |
115 | MAX14577_MUIC_ADC_RESERVED_ACC_1, | |
116 | MAX14577_MUIC_ADC_RESERVED_ACC_2, | |
117 | MAX14577_MUIC_ADC_RESERVED_ACC_3, | |
118 | MAX14577_MUIC_ADC_RESERVED_ACC_4, | |
119 | MAX14577_MUIC_ADC_RESERVED_ACC_5, | |
120 | MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2, | |
121 | MAX14577_MUIC_ADC_PHONE_POWERED_DEV, | |
122 | MAX14577_MUIC_ADC_TTY_CONVERTER, | |
123 | MAX14577_MUIC_ADC_UART_CABLE, | |
124 | MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG, | |
125 | MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF, | |
126 | MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON, | |
127 | MAX14577_MUIC_ADC_AV_CABLE_NOLOAD, | |
128 | MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG, | |
129 | MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF, | |
130 | MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON, | |
131 | MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */ | |
132 | MAX14577_MUIC_ADC_OPEN, | |
133 | }; | |
134 | ||
135 | /* max14577 MUIC device support below list of accessories(external connector) */ | |
136 | enum { | |
137 | EXTCON_CABLE_USB = 0, | |
138 | EXTCON_CABLE_TA, | |
139 | EXTCON_CABLE_FAST_CHARGER, | |
140 | EXTCON_CABLE_SLOW_CHARGER, | |
141 | EXTCON_CABLE_CHARGE_DOWNSTREAM, | |
142 | EXTCON_CABLE_JIG_USB_ON, | |
143 | EXTCON_CABLE_JIG_USB_OFF, | |
144 | EXTCON_CABLE_JIG_UART_OFF, | |
145 | EXTCON_CABLE_JIG_UART_ON, | |
146 | ||
147 | _EXTCON_CABLE_NUM, | |
148 | }; | |
149 | ||
150 | static const char *max14577_extcon_cable[] = { | |
151 | [EXTCON_CABLE_USB] = "USB", | |
152 | [EXTCON_CABLE_TA] = "TA", | |
153 | [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger", | |
154 | [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger", | |
155 | [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream", | |
156 | [EXTCON_CABLE_JIG_USB_ON] = "JIG-USB-ON", | |
157 | [EXTCON_CABLE_JIG_USB_OFF] = "JIG-USB-OFF", | |
158 | [EXTCON_CABLE_JIG_UART_OFF] = "JIG-UART-OFF", | |
159 | [EXTCON_CABLE_JIG_UART_ON] = "JIG-UART-ON", | |
160 | ||
161 | NULL, | |
162 | }; | |
163 | ||
164 | /* | |
165 | * max14577_muic_set_debounce_time - Set the debounce time of ADC | |
166 | * @info: the instance including private data of max14577 MUIC | |
167 | * @time: the debounce time of ADC | |
168 | */ | |
169 | static int max14577_muic_set_debounce_time(struct max14577_muic_info *info, | |
170 | enum max14577_muic_adc_debounce_time time) | |
171 | { | |
172 | u8 ret; | |
173 | ||
174 | switch (time) { | |
175 | case ADC_DEBOUNCE_TIME_5MS: | |
176 | case ADC_DEBOUNCE_TIME_10MS: | |
177 | case ADC_DEBOUNCE_TIME_25MS: | |
178 | case ADC_DEBOUNCE_TIME_38_62MS: | |
179 | ret = max14577_update_reg(info->max14577->regmap, | |
180 | MAX14577_MUIC_REG_CONTROL3, | |
181 | CTRL3_ADCDBSET_MASK, | |
182 | time << CTRL3_ADCDBSET_SHIFT); | |
183 | if (ret) { | |
184 | dev_err(info->dev, "failed to set ADC debounce time\n"); | |
185 | return ret; | |
186 | } | |
187 | break; | |
188 | default: | |
189 | dev_err(info->dev, "invalid ADC debounce time\n"); | |
190 | return -EINVAL; | |
191 | } | |
192 | ||
193 | return 0; | |
194 | }; | |
195 | ||
196 | /* | |
197 | * max14577_muic_set_path - Set hardware line according to attached cable | |
198 | * @info: the instance including private data of max14577 MUIC | |
199 | * @value: the path according to attached cable | |
200 | * @attached: the state of cable (true:attached, false:detached) | |
201 | * | |
202 | * The max14577 MUIC device share outside H/W line among a varity of cables | |
203 | * so, this function set internal path of H/W line according to the type of | |
204 | * attached cable. | |
205 | */ | |
206 | static int max14577_muic_set_path(struct max14577_muic_info *info, | |
207 | u8 val, bool attached) | |
208 | { | |
209 | int ret = 0; | |
210 | u8 ctrl1, ctrl2 = 0; | |
211 | ||
212 | /* Set open state to path before changing hw path */ | |
213 | ret = max14577_update_reg(info->max14577->regmap, | |
214 | MAX14577_MUIC_REG_CONTROL1, | |
215 | CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN); | |
216 | if (ret < 0) { | |
217 | dev_err(info->dev, "failed to update MUIC register\n"); | |
218 | return ret; | |
219 | } | |
220 | ||
221 | if (attached) | |
222 | ctrl1 = val; | |
223 | else | |
224 | ctrl1 = CTRL1_SW_OPEN; | |
225 | ||
226 | ret = max14577_update_reg(info->max14577->regmap, | |
227 | MAX14577_MUIC_REG_CONTROL1, | |
228 | CLEAR_IDBEN_MICEN_MASK, ctrl1); | |
229 | if (ret < 0) { | |
230 | dev_err(info->dev, "failed to update MUIC register\n"); | |
231 | return ret; | |
232 | } | |
233 | ||
234 | if (attached) | |
235 | ctrl2 |= CTRL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ | |
236 | else | |
237 | ctrl2 |= CTRL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ | |
238 | ||
239 | ret = max14577_update_reg(info->max14577->regmap, | |
240 | MAX14577_REG_CONTROL2, | |
241 | CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2); | |
242 | if (ret < 0) { | |
243 | dev_err(info->dev, "failed to update MUIC register\n"); | |
244 | return ret; | |
245 | } | |
246 | ||
247 | dev_dbg(info->dev, | |
248 | "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", | |
249 | ctrl1, ctrl2, attached ? "attached" : "detached"); | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
254 | /* | |
255 | * max14577_muic_get_cable_type - Return cable type and check cable state | |
256 | * @info: the instance including private data of max14577 MUIC | |
257 | * @group: the path according to attached cable | |
258 | * @attached: store cable state and return | |
259 | * | |
260 | * This function check the cable state either attached or detached, | |
261 | * and then divide precise type of cable according to cable group. | |
262 | * - max14577_CABLE_GROUP_ADC | |
263 | * - max14577_CABLE_GROUP_CHG | |
264 | */ | |
265 | static int max14577_muic_get_cable_type(struct max14577_muic_info *info, | |
266 | enum max14577_muic_cable_group group, bool *attached) | |
267 | { | |
268 | int cable_type = 0; | |
269 | int adc; | |
270 | int chg_type; | |
271 | ||
272 | switch (group) { | |
273 | case MAX14577_CABLE_GROUP_ADC: | |
274 | /* | |
275 | * Read ADC value to check cable type and decide cable state | |
276 | * according to cable type | |
277 | */ | |
278 | adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK; | |
279 | adc >>= STATUS1_ADC_SHIFT; | |
280 | ||
281 | /* | |
282 | * Check current cable state/cable type and store cable type | |
283 | * (info->prev_cable_type) for handling cable when cable is | |
284 | * detached. | |
285 | */ | |
286 | if (adc == MAX14577_MUIC_ADC_OPEN) { | |
287 | *attached = false; | |
288 | ||
289 | cable_type = info->prev_cable_type; | |
290 | info->prev_cable_type = MAX14577_MUIC_ADC_OPEN; | |
291 | } else { | |
292 | *attached = true; | |
293 | ||
294 | cable_type = info->prev_cable_type = adc; | |
295 | } | |
296 | break; | |
297 | case MAX14577_CABLE_GROUP_CHG: | |
298 | /* | |
299 | * Read charger type to check cable type and decide cable state | |
300 | * according to type of charger cable. | |
301 | */ | |
302 | chg_type = info->status[MAX14577_MUIC_STATUS2] & | |
303 | STATUS2_CHGTYP_MASK; | |
304 | chg_type >>= STATUS2_CHGTYP_SHIFT; | |
305 | ||
306 | if (chg_type == MAX14577_CHARGER_TYPE_NONE) { | |
307 | *attached = false; | |
308 | ||
309 | cable_type = info->prev_chg_type; | |
310 | info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE; | |
311 | } else { | |
312 | *attached = true; | |
313 | ||
314 | /* | |
315 | * Check current cable state/cable type and store cable | |
316 | * type(info->prev_chg_type) for handling cable when | |
317 | * charger cable is detached. | |
318 | */ | |
319 | cable_type = info->prev_chg_type = chg_type; | |
320 | } | |
321 | ||
322 | break; | |
323 | default: | |
324 | dev_err(info->dev, "Unknown cable group (%d)\n", group); | |
325 | cable_type = -EINVAL; | |
326 | break; | |
327 | } | |
328 | ||
329 | return cable_type; | |
330 | } | |
331 | ||
332 | static int max14577_muic_jig_handler(struct max14577_muic_info *info, | |
333 | int cable_type, bool attached) | |
334 | { | |
335 | char cable_name[32]; | |
336 | int ret = 0; | |
337 | u8 path = CTRL1_SW_OPEN; | |
338 | ||
339 | dev_dbg(info->dev, | |
340 | "external connector is %s (adc:0x%02x)\n", | |
341 | attached ? "attached" : "detached", cable_type); | |
342 | ||
343 | switch (cable_type) { | |
344 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */ | |
345 | /* PATH:AP_USB */ | |
346 | strcpy(cable_name, "JIG-USB-OFF"); | |
347 | path = CTRL1_SW_USB; | |
348 | break; | |
349 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */ | |
350 | /* PATH:AP_USB */ | |
351 | strcpy(cable_name, "JIG-USB-ON"); | |
352 | path = CTRL1_SW_USB; | |
353 | break; | |
354 | case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */ | |
355 | /* PATH:AP_UART */ | |
356 | strcpy(cable_name, "JIG-UART-OFF"); | |
357 | path = CTRL1_SW_UART; | |
358 | break; | |
359 | default: | |
360 | dev_err(info->dev, "failed to detect %s jig cable\n", | |
361 | attached ? "attached" : "detached"); | |
362 | return -EINVAL; | |
363 | } | |
364 | ||
365 | ret = max14577_muic_set_path(info, path, attached); | |
366 | if (ret < 0) | |
367 | return ret; | |
368 | ||
369 | extcon_set_cable_state(info->edev, cable_name, attached); | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
374 | static int max14577_muic_adc_handler(struct max14577_muic_info *info) | |
375 | { | |
376 | int cable_type; | |
377 | bool attached; | |
378 | int ret = 0; | |
379 | ||
380 | /* Check accessory state which is either detached or attached */ | |
381 | cable_type = max14577_muic_get_cable_type(info, | |
382 | MAX14577_CABLE_GROUP_ADC, &attached); | |
383 | ||
384 | dev_dbg(info->dev, | |
385 | "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", | |
386 | attached ? "attached" : "detached", cable_type, | |
387 | info->prev_cable_type); | |
388 | ||
389 | switch (cable_type) { | |
390 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
391 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: | |
392 | case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
393 | /* JIG */ | |
394 | ret = max14577_muic_jig_handler(info, cable_type, attached); | |
395 | if (ret < 0) | |
396 | return ret; | |
397 | break; | |
398 | case MAX14577_MUIC_ADC_GROUND: | |
399 | case MAX14577_MUIC_ADC_SEND_END_BUTTON: | |
400 | case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON: | |
401 | case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON: | |
402 | case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON: | |
403 | case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON: | |
404 | case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON: | |
405 | case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON: | |
406 | case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON: | |
407 | case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON: | |
408 | case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON: | |
409 | case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON: | |
410 | case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON: | |
411 | case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON: | |
412 | case MAX14577_MUIC_ADC_RESERVED_ACC_1: | |
413 | case MAX14577_MUIC_ADC_RESERVED_ACC_2: | |
414 | case MAX14577_MUIC_ADC_RESERVED_ACC_3: | |
415 | case MAX14577_MUIC_ADC_RESERVED_ACC_4: | |
416 | case MAX14577_MUIC_ADC_RESERVED_ACC_5: | |
417 | case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2: | |
418 | case MAX14577_MUIC_ADC_PHONE_POWERED_DEV: | |
419 | case MAX14577_MUIC_ADC_TTY_CONVERTER: | |
420 | case MAX14577_MUIC_ADC_UART_CABLE: | |
421 | case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG: | |
422 | case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD: | |
423 | case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG: | |
424 | case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON: | |
425 | case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1: | |
426 | /* | |
427 | * This accessory isn't used in general case if it is specially | |
428 | * needed to detect additional accessory, should implement | |
429 | * proper operation when this accessory is attached/detached. | |
430 | */ | |
431 | dev_info(info->dev, | |
432 | "accessory is %s but it isn't used (adc:0x%x)\n", | |
433 | attached ? "attached" : "detached", cable_type); | |
434 | return -EAGAIN; | |
435 | default: | |
436 | dev_err(info->dev, | |
437 | "failed to detect %s accessory (adc:0x%x)\n", | |
438 | attached ? "attached" : "detached", cable_type); | |
439 | return -EINVAL; | |
440 | } | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
445 | static int max14577_muic_chg_handler(struct max14577_muic_info *info) | |
446 | { | |
447 | int chg_type; | |
448 | bool attached; | |
449 | int ret = 0; | |
450 | ||
451 | chg_type = max14577_muic_get_cable_type(info, | |
452 | MAX14577_CABLE_GROUP_CHG, &attached); | |
453 | ||
454 | dev_dbg(info->dev, | |
455 | "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", | |
456 | attached ? "attached" : "detached", | |
457 | chg_type, info->prev_chg_type); | |
458 | ||
459 | switch (chg_type) { | |
460 | case MAX14577_CHARGER_TYPE_USB: | |
461 | /* PATH:AP_USB */ | |
462 | ret = max14577_muic_set_path(info, info->path_usb, attached); | |
463 | if (ret < 0) | |
464 | return ret; | |
465 | ||
466 | extcon_set_cable_state(info->edev, "USB", attached); | |
467 | break; | |
468 | case MAX14577_CHARGER_TYPE_DEDICATED_CHG: | |
469 | extcon_set_cable_state(info->edev, "TA", attached); | |
470 | break; | |
471 | case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT: | |
472 | extcon_set_cable_state(info->edev, | |
473 | "Charge-downstream", attached); | |
474 | break; | |
475 | case MAX14577_CHARGER_TYPE_SPECIAL_500MA: | |
476 | extcon_set_cable_state(info->edev, "Slow-charger", attached); | |
477 | break; | |
478 | case MAX14577_CHARGER_TYPE_SPECIAL_1A: | |
479 | extcon_set_cable_state(info->edev, "Fast-charger", attached); | |
480 | break; | |
481 | case MAX14577_CHARGER_TYPE_NONE: | |
482 | case MAX14577_CHARGER_TYPE_DEAD_BATTERY: | |
483 | break; | |
484 | default: | |
485 | dev_err(info->dev, | |
486 | "failed to detect %s accessory (chg_type:0x%x)\n", | |
487 | attached ? "attached" : "detached", chg_type); | |
488 | return -EINVAL; | |
489 | } | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | static void max14577_muic_irq_work(struct work_struct *work) | |
495 | { | |
496 | struct max14577_muic_info *info = container_of(work, | |
497 | struct max14577_muic_info, irq_work); | |
498 | int ret = 0; | |
499 | ||
500 | if (!info->edev) | |
501 | return; | |
502 | ||
503 | mutex_lock(&info->mutex); | |
504 | ||
505 | ret = max14577_bulk_read(info->max14577->regmap, | |
506 | MAX14577_MUIC_REG_STATUS1, info->status, 2); | |
507 | if (ret) { | |
508 | dev_err(info->dev, "failed to read MUIC register\n"); | |
509 | mutex_unlock(&info->mutex); | |
510 | return; | |
511 | } | |
512 | ||
513 | if (info->irq_adc) { | |
514 | ret = max14577_muic_adc_handler(info); | |
515 | info->irq_adc = false; | |
516 | } | |
517 | if (info->irq_chg) { | |
518 | ret = max14577_muic_chg_handler(info); | |
519 | info->irq_chg = false; | |
520 | } | |
521 | ||
522 | if (ret < 0) | |
523 | dev_err(info->dev, "failed to handle MUIC interrupt\n"); | |
524 | ||
525 | mutex_unlock(&info->mutex); | |
526 | ||
527 | return; | |
528 | } | |
529 | ||
530 | static irqreturn_t max14577_muic_irq_handler(int irq, void *data) | |
531 | { | |
532 | struct max14577_muic_info *info = data; | |
533 | int i, irq_type = -1; | |
534 | ||
535 | /* | |
536 | * We may be called multiple times for different nested IRQ-s. | |
537 | * Including changes in INT1_ADC and INT2_CGHTYP at once. | |
538 | * However we only need to know whether it was ADC, charger | |
539 | * or both interrupts so decode IRQ and turn on proper flags. | |
540 | */ | |
2b1d18f1 KK |
541 | for (i = 0; i < ARRAY_SIZE(max14577_muic_irqs); i++) |
542 | if (irq == max14577_muic_irqs[i].virq) | |
543 | irq_type = max14577_muic_irqs[i].irq; | |
962e56bf CC |
544 | |
545 | switch (irq_type) { | |
546 | case MAX14577_IRQ_INT1_ADC: | |
547 | case MAX14577_IRQ_INT1_ADCLOW: | |
548 | case MAX14577_IRQ_INT1_ADCERR: | |
549 | /* Handle all of accessory except for | |
550 | type of charger accessory */ | |
551 | info->irq_adc = true; | |
552 | break; | |
553 | case MAX14577_IRQ_INT2_CHGTYP: | |
554 | case MAX14577_IRQ_INT2_CHGDETRUN: | |
555 | case MAX14577_IRQ_INT2_DCDTMR: | |
556 | case MAX14577_IRQ_INT2_DBCHG: | |
557 | case MAX14577_IRQ_INT2_VBVOLT: | |
558 | /* Handle charger accessory */ | |
559 | info->irq_chg = true; | |
560 | break; | |
561 | default: | |
562 | dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n", | |
563 | irq_type); | |
564 | return IRQ_HANDLED; | |
565 | } | |
566 | schedule_work(&info->irq_work); | |
567 | ||
568 | return IRQ_HANDLED; | |
569 | } | |
570 | ||
571 | static int max14577_muic_detect_accessory(struct max14577_muic_info *info) | |
572 | { | |
573 | int ret = 0; | |
574 | int adc; | |
575 | int chg_type; | |
576 | bool attached; | |
577 | ||
578 | mutex_lock(&info->mutex); | |
579 | ||
580 | /* Read STATUSx register to detect accessory */ | |
581 | ret = max14577_bulk_read(info->max14577->regmap, | |
582 | MAX14577_MUIC_REG_STATUS1, info->status, 2); | |
583 | if (ret) { | |
584 | dev_err(info->dev, "failed to read MUIC register\n"); | |
585 | mutex_unlock(&info->mutex); | |
586 | return ret; | |
587 | } | |
588 | ||
589 | adc = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC, | |
590 | &attached); | |
591 | if (attached && adc != MAX14577_MUIC_ADC_OPEN) { | |
592 | ret = max14577_muic_adc_handler(info); | |
593 | if (ret < 0) { | |
594 | dev_err(info->dev, "Cannot detect accessory\n"); | |
595 | mutex_unlock(&info->mutex); | |
596 | return ret; | |
597 | } | |
598 | } | |
599 | ||
600 | chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG, | |
601 | &attached); | |
602 | if (attached && chg_type != MAX14577_CHARGER_TYPE_NONE) { | |
603 | ret = max14577_muic_chg_handler(info); | |
604 | if (ret < 0) { | |
605 | dev_err(info->dev, "Cannot detect charger accessory\n"); | |
606 | mutex_unlock(&info->mutex); | |
607 | return ret; | |
608 | } | |
609 | } | |
610 | ||
611 | mutex_unlock(&info->mutex); | |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
616 | static void max14577_muic_detect_cable_wq(struct work_struct *work) | |
617 | { | |
618 | struct max14577_muic_info *info = container_of(to_delayed_work(work), | |
619 | struct max14577_muic_info, wq_detcable); | |
620 | ||
621 | max14577_muic_detect_accessory(info); | |
622 | } | |
623 | ||
624 | static int max14577_muic_probe(struct platform_device *pdev) | |
625 | { | |
626 | struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent); | |
627 | struct max14577_muic_info *info; | |
628 | int delay_jiffies; | |
629 | int ret; | |
630 | int i; | |
631 | u8 id; | |
632 | ||
633 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
634 | if (!info) { | |
635 | dev_err(&pdev->dev, "failed to allocate memory\n"); | |
636 | return -ENOMEM; | |
637 | } | |
638 | info->dev = &pdev->dev; | |
639 | info->max14577 = max14577; | |
640 | ||
641 | platform_set_drvdata(pdev, info); | |
642 | mutex_init(&info->mutex); | |
643 | ||
644 | INIT_WORK(&info->irq_work, max14577_muic_irq_work); | |
645 | ||
646 | /* Support irq domain for max14577 MUIC device */ | |
2b1d18f1 KK |
647 | for (i = 0; i < ARRAY_SIZE(max14577_muic_irqs); i++) { |
648 | struct max14577_muic_irq *muic_irq = &max14577_muic_irqs[i]; | |
962e56bf CC |
649 | unsigned int virq = 0; |
650 | ||
651 | virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq); | |
652 | if (!virq) | |
653 | return -EINVAL; | |
654 | muic_irq->virq = virq; | |
655 | ||
656 | ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, | |
657 | max14577_muic_irq_handler, | |
658 | IRQF_NO_SUSPEND, | |
659 | muic_irq->name, info); | |
660 | if (ret) { | |
661 | dev_err(&pdev->dev, | |
662 | "failed: irq request (IRQ: %d," | |
663 | " error :%d)\n", | |
664 | muic_irq->irq, ret); | |
665 | return ret; | |
666 | } | |
667 | } | |
668 | ||
669 | /* Initialize extcon device */ | |
670 | info->edev = devm_kzalloc(&pdev->dev, sizeof(*info->edev), GFP_KERNEL); | |
671 | if (!info->edev) { | |
672 | dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); | |
673 | return -ENOMEM; | |
674 | } | |
4005da5c CC |
675 | |
676 | info->edev->name = dev_name(&pdev->dev); | |
962e56bf CC |
677 | info->edev->supported_cable = max14577_extcon_cable; |
678 | ret = extcon_dev_register(info->edev); | |
679 | if (ret) { | |
680 | dev_err(&pdev->dev, "failed to register extcon device\n"); | |
681 | return ret; | |
682 | } | |
683 | ||
684 | /* Default h/w line path */ | |
685 | info->path_usb = CTRL1_SW_USB; | |
686 | info->path_uart = CTRL1_SW_UART; | |
687 | delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); | |
688 | ||
689 | /* Set initial path for UART */ | |
690 | max14577_muic_set_path(info, info->path_uart, true); | |
691 | ||
692 | /* Check revision number of MUIC device*/ | |
693 | ret = max14577_read_reg(info->max14577->regmap, | |
694 | MAX14577_REG_DEVICEID, &id); | |
695 | if (ret < 0) { | |
696 | dev_err(&pdev->dev, "failed to read revision number\n"); | |
697 | goto err_extcon; | |
698 | } | |
699 | dev_info(info->dev, "device ID : 0x%x\n", id); | |
700 | ||
701 | /* Set ADC debounce time */ | |
702 | max14577_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); | |
703 | ||
704 | /* | |
705 | * Detect accessory after completing the initialization of platform | |
706 | * | |
707 | * - Use delayed workqueue to detect cable state and then | |
708 | * notify cable state to notifiee/platform through uevent. | |
709 | * After completing the booting of platform, the extcon provider | |
710 | * driver should notify cable state to upper layer. | |
711 | */ | |
712 | INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq); | |
713 | ret = queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, | |
714 | delay_jiffies); | |
715 | if (ret < 0) { | |
716 | dev_err(&pdev->dev, | |
717 | "failed to schedule delayed work for cable detect\n"); | |
718 | goto err_extcon; | |
719 | } | |
720 | ||
721 | return ret; | |
722 | ||
723 | err_extcon: | |
724 | extcon_dev_unregister(info->edev); | |
725 | return ret; | |
726 | } | |
727 | ||
728 | static int max14577_muic_remove(struct platform_device *pdev) | |
729 | { | |
730 | struct max14577_muic_info *info = platform_get_drvdata(pdev); | |
731 | ||
732 | cancel_work_sync(&info->irq_work); | |
733 | extcon_dev_unregister(info->edev); | |
734 | ||
735 | return 0; | |
736 | } | |
737 | ||
738 | static struct platform_driver max14577_muic_driver = { | |
739 | .driver = { | |
4005da5c | 740 | .name = "max14577-muic", |
962e56bf CC |
741 | .owner = THIS_MODULE, |
742 | }, | |
743 | .probe = max14577_muic_probe, | |
744 | .remove = max14577_muic_remove, | |
745 | }; | |
746 | ||
747 | module_platform_driver(max14577_muic_driver); | |
748 | ||
749 | MODULE_DESCRIPTION("MAXIM 14577 Extcon driver"); | |
750 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); | |
751 | MODULE_LICENSE("GPL"); | |
752 | MODULE_ALIAS("platform:extcon-max14577"); |