1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // |
3 | // extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC |
4 | // |
5 | // Copyright (C) 2012 Samsung Electrnoics |
6 | // Chanwoo Choi <cw00.choi@samsung.com> |
7 | |
8 | #include <linux/devm-helpers.h> |
9 | #include <linux/kernel.h> |
10 | #include <linux/module.h> |
11 | #include <linux/i2c.h> |
12 | #include <linux/slab.h> |
13 | #include <linux/input.h> |
14 | #include <linux/interrupt.h> |
15 | #include <linux/err.h> |
16 | #include <linux/platform_device.h> |
17 | #include <linux/mfd/max77693.h> |
18 | #include <linux/mfd/max77693-common.h> |
19 | #include <linux/mfd/max77693-private.h> |
20 | #include <linux/extcon-provider.h> |
21 | #include <linux/regmap.h> |
22 | #include <linux/irqdomain.h> |
23 | |
24 | #define DEV_NAME "max77693-muic" |
25 | #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ |
26 | |
27 | /* |
28 | * Default value of MAX77693 register to bring up MUIC device. |
29 | * If user don't set some initial value for MUIC device through platform data, |
30 | * extcon-max77693 driver use 'default_init_data' to bring up base operation |
31 | * of MAX77693 MUIC device. |
32 | */ |
33 | static struct max77693_reg_data default_init_data[] = { |
34 | { |
35 | /* STATUS2 - [3]ChgDetRun */ |
36 | .addr = MAX77693_MUIC_REG_STATUS2, |
37 | .data = MAX77693_STATUS2_CHGDETRUN_MASK, |
38 | }, { |
39 | /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */ |
40 | .addr = MAX77693_MUIC_REG_INTMASK1, |
41 | .data = INTMASK1_ADC1K_MASK |
42 | | INTMASK1_ADC_MASK, |
43 | }, { |
44 | /* INTMASK2 - Unmask [0]ChgTypM */ |
45 | .addr = MAX77693_MUIC_REG_INTMASK2, |
46 | .data = INTMASK2_CHGTYP_MASK, |
47 | }, { |
48 | /* INTMASK3 - Mask all of interrupts */ |
49 | .addr = MAX77693_MUIC_REG_INTMASK3, |
50 | .data = 0x0, |
51 | }, { |
52 | /* CDETCTRL2 */ |
53 | .addr = MAX77693_MUIC_REG_CDETCTRL2, |
54 | .data = CDETCTRL2_VIDRMEN_MASK |
55 | | CDETCTRL2_DXOVPEN_MASK, |
56 | }, |
57 | }; |
58 | |
59 | enum max77693_muic_adc_debounce_time { |
60 | ADC_DEBOUNCE_TIME_5MS = 0, |
61 | ADC_DEBOUNCE_TIME_10MS, |
62 | ADC_DEBOUNCE_TIME_25MS, |
63 | ADC_DEBOUNCE_TIME_38_62MS, |
64 | }; |
65 | |
66 | struct max77693_muic_info { |
67 | struct device *dev; |
68 | struct max77693_dev *max77693; |
69 | struct extcon_dev *edev; |
70 | int prev_cable_type; |
71 | int prev_cable_type_gnd; |
72 | int prev_chg_type; |
73 | int prev_button_type; |
74 | u8 status[2]; |
75 | |
76 | int irq; |
77 | struct work_struct irq_work; |
78 | struct mutex mutex; |
79 | |
80 | /* |
81 | * Use delayed workqueue to detect cable state and then |
82 | * notify cable state to notifiee/platform through uevent. |
83 | * After completing the booting of platform, the extcon provider |
84 | * driver should notify cable state to upper layer. |
85 | */ |
86 | struct delayed_work wq_detcable; |
87 | |
88 | /* Button of dock device */ |
89 | struct input_dev *dock; |
90 | |
91 | /* |
92 | * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB |
93 | * h/w path of COMP2/COMN1 on CONTROL1 register. |
94 | */ |
95 | int path_usb; |
96 | int path_uart; |
97 | }; |
98 | |
99 | enum max77693_muic_cable_group { |
100 | MAX77693_CABLE_GROUP_ADC = 0, |
101 | MAX77693_CABLE_GROUP_ADC_GND, |
102 | MAX77693_CABLE_GROUP_CHG, |
103 | MAX77693_CABLE_GROUP_VBVOLT, |
104 | }; |
105 | |
106 | enum max77693_muic_charger_type { |
107 | MAX77693_CHARGER_TYPE_NONE = 0, |
108 | MAX77693_CHARGER_TYPE_USB, |
109 | MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT, |
110 | MAX77693_CHARGER_TYPE_DEDICATED_CHG, |
111 | MAX77693_CHARGER_TYPE_APPLE_500MA, |
112 | MAX77693_CHARGER_TYPE_APPLE_1A_2A, |
113 | MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7, |
114 | }; |
115 | |
116 | /** |
117 | * struct max77693_muic_irq |
118 | * @irq: the index of irq list of MUIC device. |
119 | * @name: the name of irq. |
120 | * @virq: the virtual irq to use irq domain |
121 | */ |
122 | struct max77693_muic_irq { |
123 | unsigned int irq; |
124 | const char *name; |
125 | unsigned int virq; |
126 | }; |
127 | |
128 | static struct max77693_muic_irq muic_irqs[] = { |
129 | { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" }, |
130 | { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" }, |
131 | { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" }, |
132 | { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" }, |
133 | { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, |
134 | { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" }, |
135 | { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, |
136 | { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" }, |
137 | { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, |
138 | { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" }, |
139 | { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" }, |
140 | { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" }, |
141 | { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" }, |
142 | { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" }, |
143 | { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" }, |
144 | { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" }, |
145 | }; |
146 | |
147 | /* Define supported accessory type */ |
148 | enum max77693_muic_acc_type { |
149 | MAX77693_MUIC_ADC_GROUND = 0x0, |
150 | MAX77693_MUIC_ADC_SEND_END_BUTTON, |
151 | MAX77693_MUIC_ADC_REMOTE_S1_BUTTON, |
152 | MAX77693_MUIC_ADC_REMOTE_S2_BUTTON, |
153 | MAX77693_MUIC_ADC_REMOTE_S3_BUTTON, |
154 | MAX77693_MUIC_ADC_REMOTE_S4_BUTTON, |
155 | MAX77693_MUIC_ADC_REMOTE_S5_BUTTON, |
156 | MAX77693_MUIC_ADC_REMOTE_S6_BUTTON, |
157 | MAX77693_MUIC_ADC_REMOTE_S7_BUTTON, |
158 | MAX77693_MUIC_ADC_REMOTE_S8_BUTTON, |
159 | MAX77693_MUIC_ADC_REMOTE_S9_BUTTON, |
160 | MAX77693_MUIC_ADC_REMOTE_S10_BUTTON, |
161 | MAX77693_MUIC_ADC_REMOTE_S11_BUTTON, |
162 | MAX77693_MUIC_ADC_REMOTE_S12_BUTTON, |
163 | MAX77693_MUIC_ADC_RESERVED_ACC_1, |
164 | MAX77693_MUIC_ADC_RESERVED_ACC_2, |
165 | MAX77693_MUIC_ADC_RESERVED_ACC_3, |
166 | MAX77693_MUIC_ADC_RESERVED_ACC_4, |
167 | MAX77693_MUIC_ADC_RESERVED_ACC_5, |
168 | MAX77693_MUIC_ADC_CEA936_AUDIO, |
169 | MAX77693_MUIC_ADC_PHONE_POWERED_DEV, |
170 | MAX77693_MUIC_ADC_TTY_CONVERTER, |
171 | MAX77693_MUIC_ADC_UART_CABLE, |
172 | MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG, |
173 | MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF, |
174 | MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON, |
175 | MAX77693_MUIC_ADC_AV_CABLE_NOLOAD, |
176 | MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG, |
177 | MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF, |
178 | MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON, |
179 | MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE, |
180 | MAX77693_MUIC_ADC_OPEN, |
181 | |
182 | /* |
183 | * The below accessories have same ADC value so ADCLow and |
184 | * ADC1K bit is used to separate specific accessory. |
185 | */ |
186 | /* ADC|VBVolot|ADCLow|ADC1K| */ |
187 | MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */ |
188 | MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */ |
189 | MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */ |
190 | MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */ |
191 | MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */ |
192 | }; |
193 | |
194 | /* |
195 | * MAX77693 MUIC device support below list of accessories(external connector) |
196 | */ |
197 | static const unsigned int max77693_extcon_cable[] = { |
198 | EXTCON_USB, |
199 | EXTCON_USB_HOST, |
200 | EXTCON_CHG_USB_SDP, |
201 | EXTCON_CHG_USB_DCP, |
202 | EXTCON_CHG_USB_FAST, |
203 | EXTCON_CHG_USB_SLOW, |
204 | EXTCON_CHG_USB_CDP, |
205 | EXTCON_DISP_MHL, |
206 | EXTCON_JIG, |
207 | EXTCON_DOCK, |
208 | EXTCON_NONE, |
209 | }; |
210 | |
211 | /* |
212 | * max77693_muic_set_debounce_time - Set the debounce time of ADC |
213 | * @info: the instance including private data of max77693 MUIC |
214 | * @time: the debounce time of ADC |
215 | */ |
216 | static int max77693_muic_set_debounce_time(struct max77693_muic_info *info, |
217 | enum max77693_muic_adc_debounce_time time) |
218 | { |
219 | int ret; |
220 | |
221 | switch (time) { |
222 | case ADC_DEBOUNCE_TIME_5MS: |
223 | case ADC_DEBOUNCE_TIME_10MS: |
224 | case ADC_DEBOUNCE_TIME_25MS: |
225 | case ADC_DEBOUNCE_TIME_38_62MS: |
226 | /* |
227 | * Don't touch BTLDset, JIGset when you want to change adc |
228 | * debounce time. If it writes other than 0 to BTLDset, JIGset |
229 | * muic device will be reset and loose current state. |
230 | */ |
231 | ret = regmap_write(map: info->max77693->regmap_muic, |
232 | reg: MAX77693_MUIC_REG_CTRL3, |
233 | val: time << MAX77693_CONTROL3_ADCDBSET_SHIFT); |
234 | if (ret) { |
235 | dev_err(info->dev, "failed to set ADC debounce time\n" ); |
236 | return ret; |
237 | } |
238 | break; |
239 | default: |
240 | dev_err(info->dev, "invalid ADC debounce time\n" ); |
241 | return -EINVAL; |
242 | } |
243 | |
244 | return 0; |
245 | }; |
246 | |
247 | /* |
248 | * max77693_muic_set_path - Set hardware line according to attached cable |
249 | * @info: the instance including private data of max77693 MUIC |
250 | * @value: the path according to attached cable |
251 | * @attached: the state of cable (true:attached, false:detached) |
252 | * |
253 | * The max77693 MUIC device share outside H/W line among a varity of cables |
254 | * so, this function set internal path of H/W line according to the type of |
255 | * attached cable. |
256 | */ |
257 | static int max77693_muic_set_path(struct max77693_muic_info *info, |
258 | u8 val, bool attached) |
259 | { |
260 | int ret; |
261 | unsigned int ctrl1, ctrl2 = 0; |
262 | |
263 | if (attached) |
264 | ctrl1 = val; |
265 | else |
266 | ctrl1 = MAX77693_CONTROL1_SW_OPEN; |
267 | |
268 | ret = regmap_update_bits(map: info->max77693->regmap_muic, |
269 | reg: MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, val: ctrl1); |
270 | if (ret < 0) { |
271 | dev_err(info->dev, "failed to update MUIC register\n" ); |
272 | return ret; |
273 | } |
274 | |
275 | if (attached) |
276 | ctrl2 |= MAX77693_CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ |
277 | else |
278 | ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ |
279 | |
280 | ret = regmap_update_bits(map: info->max77693->regmap_muic, |
281 | reg: MAX77693_MUIC_REG_CTRL2, |
282 | MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK, |
283 | val: ctrl2); |
284 | if (ret < 0) { |
285 | dev_err(info->dev, "failed to update MUIC register\n" ); |
286 | return ret; |
287 | } |
288 | |
289 | dev_info(info->dev, |
290 | "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n" , |
291 | ctrl1, ctrl2, attached ? "attached" : "detached" ); |
292 | |
293 | return 0; |
294 | } |
295 | |
296 | /* |
297 | * max77693_muic_get_cable_type - Return cable type and check cable state |
298 | * @info: the instance including private data of max77693 MUIC |
299 | * @group: the path according to attached cable |
300 | * @attached: store cable state and return |
301 | * |
302 | * This function check the cable state either attached or detached, |
303 | * and then divide precise type of cable according to cable group. |
304 | * - MAX77693_CABLE_GROUP_ADC |
305 | * - MAX77693_CABLE_GROUP_ADC_GND |
306 | * - MAX77693_CABLE_GROUP_CHG |
307 | * - MAX77693_CABLE_GROUP_VBVOLT |
308 | */ |
309 | static int max77693_muic_get_cable_type(struct max77693_muic_info *info, |
310 | enum max77693_muic_cable_group group, bool *attached) |
311 | { |
312 | int cable_type = 0; |
313 | int adc; |
314 | int adc1k; |
315 | int adclow; |
316 | int vbvolt; |
317 | int chg_type; |
318 | |
319 | switch (group) { |
320 | case MAX77693_CABLE_GROUP_ADC: |
321 | /* |
322 | * Read ADC value to check cable type and decide cable state |
323 | * according to cable type |
324 | */ |
325 | adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; |
326 | adc >>= MAX77693_STATUS1_ADC_SHIFT; |
327 | |
328 | /* |
329 | * Check current cable state/cable type and store cable type |
330 | * (info->prev_cable_type) for handling cable when cable is |
331 | * detached. |
332 | */ |
333 | if (adc == MAX77693_MUIC_ADC_OPEN) { |
334 | *attached = false; |
335 | |
336 | cable_type = info->prev_cable_type; |
337 | info->prev_cable_type = MAX77693_MUIC_ADC_OPEN; |
338 | } else { |
339 | *attached = true; |
340 | |
341 | cable_type = info->prev_cable_type = adc; |
342 | } |
343 | break; |
344 | case MAX77693_CABLE_GROUP_ADC_GND: |
345 | /* |
346 | * Read ADC value to check cable type and decide cable state |
347 | * according to cable type |
348 | */ |
349 | adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; |
350 | adc >>= MAX77693_STATUS1_ADC_SHIFT; |
351 | |
352 | /* |
353 | * Check current cable state/cable type and store cable type |
354 | * (info->prev_cable_type/_gnd) for handling cable when cable |
355 | * is detached. |
356 | */ |
357 | if (adc == MAX77693_MUIC_ADC_OPEN) { |
358 | *attached = false; |
359 | |
360 | cable_type = info->prev_cable_type_gnd; |
361 | info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN; |
362 | } else { |
363 | *attached = true; |
364 | |
365 | adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK; |
366 | adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT; |
367 | adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK; |
368 | adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT; |
369 | |
370 | vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK; |
371 | vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT; |
372 | |
373 | /** |
374 | * [0x1|VBVolt|ADCLow|ADC1K] |
375 | * [0x1| 0| 0| 0] USB_HOST |
376 | * [0x1| 1| 0| 0] USB_HSOT_VB |
377 | * [0x1| 0| 1| 0] Audio Video cable with load |
378 | * [0x1| 0| 1| 1] MHL without charging cable |
379 | * [0x1| 1| 1| 1] MHL with charging cable |
380 | */ |
381 | cable_type = ((0x1 << 8) |
382 | | (vbvolt << 2) |
383 | | (adclow << 1) |
384 | | adc1k); |
385 | |
386 | info->prev_cable_type = adc; |
387 | info->prev_cable_type_gnd = cable_type; |
388 | } |
389 | |
390 | break; |
391 | case MAX77693_CABLE_GROUP_CHG: |
392 | /* |
393 | * Read charger type to check cable type and decide cable state |
394 | * according to type of charger cable. |
395 | */ |
396 | chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK; |
397 | chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT; |
398 | |
399 | if (chg_type == MAX77693_CHARGER_TYPE_NONE) { |
400 | *attached = false; |
401 | |
402 | cable_type = info->prev_chg_type; |
403 | info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE; |
404 | } else { |
405 | *attached = true; |
406 | |
407 | /* |
408 | * Check current cable state/cable type and store cable |
409 | * type(info->prev_chg_type) for handling cable when |
410 | * charger cable is detached. |
411 | */ |
412 | cable_type = info->prev_chg_type = chg_type; |
413 | } |
414 | |
415 | break; |
416 | case MAX77693_CABLE_GROUP_VBVOLT: |
417 | /* |
418 | * Read ADC value to check cable type and decide cable state |
419 | * according to cable type |
420 | */ |
421 | adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; |
422 | adc >>= MAX77693_STATUS1_ADC_SHIFT; |
423 | chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK; |
424 | chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT; |
425 | |
426 | if (adc == MAX77693_MUIC_ADC_OPEN |
427 | && chg_type == MAX77693_CHARGER_TYPE_NONE) |
428 | *attached = false; |
429 | else |
430 | *attached = true; |
431 | |
432 | /* |
433 | * Read vbvolt field, if vbvolt is 1, |
434 | * this cable is used for charging. |
435 | */ |
436 | vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK; |
437 | vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT; |
438 | |
439 | cable_type = vbvolt; |
440 | break; |
441 | default: |
442 | dev_err(info->dev, "Unknown cable group (%d)\n" , group); |
443 | cable_type = -EINVAL; |
444 | break; |
445 | } |
446 | |
447 | return cable_type; |
448 | } |
449 | |
450 | static int max77693_muic_dock_handler(struct max77693_muic_info *info, |
451 | int cable_type, bool attached) |
452 | { |
453 | int ret = 0; |
454 | int vbvolt; |
455 | bool cable_attached; |
456 | unsigned int dock_id; |
457 | |
458 | dev_info(info->dev, |
459 | "external connector is %s (adc:0x%02x)\n" , |
460 | attached ? "attached" : "detached" , cable_type); |
461 | |
462 | switch (cable_type) { |
463 | case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ |
464 | /* |
465 | * Check power cable whether attached or detached state. |
466 | * The Dock-Smart device need surely external power supply. |
467 | * If power cable(USB/TA) isn't connected to Dock device, |
468 | * user can't use Dock-Smart for desktop mode. |
469 | */ |
470 | vbvolt = max77693_muic_get_cable_type(info, |
471 | group: MAX77693_CABLE_GROUP_VBVOLT, attached: &cable_attached); |
472 | if (attached && !vbvolt) { |
473 | dev_warn(info->dev, |
474 | "Cannot detect external power supply\n" ); |
475 | return 0; |
476 | } |
477 | |
478 | /* |
479 | * Notify Dock/MHL state. |
480 | * - Dock device include three type of cable which |
481 | * are HDMI, USB for mouse/keyboard and micro-usb port |
482 | * for USB/TA cable. Dock device need always exteranl |
483 | * power supply(USB/TA cable through micro-usb cable). Dock |
484 | * device support screen output of target to separate |
485 | * monitor and mouse/keyboard for desktop mode. |
486 | * |
487 | * Features of 'USB/TA cable with Dock device' |
488 | * - Support MHL |
489 | * - Support external output feature of audio |
490 | * - Support charging through micro-usb port without data |
491 | * connection if TA cable is connected to target. |
492 | * - Support charging and data connection through micro-usb port |
493 | * if USB cable is connected between target and host |
494 | * device. |
495 | * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard) |
496 | */ |
497 | ret = max77693_muic_set_path(info, val: info->path_usb, attached); |
498 | if (ret < 0) |
499 | return ret; |
500 | |
501 | extcon_set_state_sync(edev: info->edev, EXTCON_DOCK, state: attached); |
502 | extcon_set_state_sync(edev: info->edev, EXTCON_DISP_MHL, state: attached); |
503 | goto out; |
504 | case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */ |
505 | dock_id = EXTCON_DOCK; |
506 | break; |
507 | case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ |
508 | dock_id = EXTCON_DOCK; |
509 | if (!attached) { |
510 | extcon_set_state_sync(edev: info->edev, EXTCON_USB, state: false); |
511 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_SDP, |
512 | state: false); |
513 | } |
514 | break; |
515 | default: |
516 | dev_err(info->dev, "failed to detect %s dock device\n" , |
517 | attached ? "attached" : "detached" ); |
518 | return -EINVAL; |
519 | } |
520 | |
521 | /* Dock-Car/Desk/Audio, PATH:AUDIO */ |
522 | ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO, |
523 | attached); |
524 | if (ret < 0) |
525 | return ret; |
526 | extcon_set_state_sync(edev: info->edev, id: dock_id, state: attached); |
527 | |
528 | out: |
529 | return 0; |
530 | } |
531 | |
532 | static int max77693_muic_dock_button_handler(struct max77693_muic_info *info, |
533 | int button_type, bool attached) |
534 | { |
535 | struct input_dev *dock = info->dock; |
536 | unsigned int code; |
537 | |
538 | switch (button_type) { |
539 | case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1 |
540 | ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1: |
541 | /* DOCK_KEY_PREV */ |
542 | code = KEY_PREVIOUSSONG; |
543 | break; |
544 | case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1 |
545 | ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1: |
546 | /* DOCK_KEY_NEXT */ |
547 | code = KEY_NEXTSONG; |
548 | break; |
549 | case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: |
550 | /* DOCK_VOL_DOWN */ |
551 | code = KEY_VOLUMEDOWN; |
552 | break; |
553 | case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: |
554 | /* DOCK_VOL_UP */ |
555 | code = KEY_VOLUMEUP; |
556 | break; |
557 | case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1 |
558 | ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1: |
559 | /* DOCK_KEY_PLAY_PAUSE */ |
560 | code = KEY_PLAYPAUSE; |
561 | break; |
562 | default: |
563 | dev_err(info->dev, |
564 | "failed to detect %s key (adc:0x%x)\n" , |
565 | attached ? "pressed" : "released" , button_type); |
566 | return -EINVAL; |
567 | } |
568 | |
569 | input_event(dev: dock, EV_KEY, code, value: attached); |
570 | input_sync(dev: dock); |
571 | |
572 | return 0; |
573 | } |
574 | |
575 | static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info) |
576 | { |
577 | int cable_type_gnd; |
578 | int ret = 0; |
579 | bool attached; |
580 | |
581 | cable_type_gnd = max77693_muic_get_cable_type(info, |
582 | group: MAX77693_CABLE_GROUP_ADC_GND, attached: &attached); |
583 | |
584 | switch (cable_type_gnd) { |
585 | case MAX77693_MUIC_GND_USB_HOST: |
586 | case MAX77693_MUIC_GND_USB_HOST_VB: |
587 | /* USB_HOST, PATH: AP_USB */ |
588 | ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB, |
589 | attached); |
590 | if (ret < 0) |
591 | return ret; |
592 | extcon_set_state_sync(edev: info->edev, EXTCON_USB_HOST, state: attached); |
593 | break; |
594 | case MAX77693_MUIC_GND_AV_CABLE_LOAD: |
595 | /* Audio Video Cable with load, PATH:AUDIO */ |
596 | ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO, |
597 | attached); |
598 | if (ret < 0) |
599 | return ret; |
600 | extcon_set_state_sync(edev: info->edev, EXTCON_USB, state: attached); |
601 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_SDP, |
602 | state: attached); |
603 | break; |
604 | case MAX77693_MUIC_GND_MHL: |
605 | case MAX77693_MUIC_GND_MHL_VB: |
606 | /* MHL or MHL with USB/TA cable */ |
607 | extcon_set_state_sync(edev: info->edev, EXTCON_DISP_MHL, state: attached); |
608 | break; |
609 | default: |
610 | dev_err(info->dev, "failed to detect %s cable of gnd type\n" , |
611 | attached ? "attached" : "detached" ); |
612 | return -EINVAL; |
613 | } |
614 | |
615 | return 0; |
616 | } |
617 | |
618 | static int max77693_muic_jig_handler(struct max77693_muic_info *info, |
619 | int cable_type, bool attached) |
620 | { |
621 | int ret = 0; |
622 | u8 path = MAX77693_CONTROL1_SW_OPEN; |
623 | |
624 | dev_info(info->dev, |
625 | "external connector is %s (adc:0x%02x)\n" , |
626 | attached ? "attached" : "detached" , cable_type); |
627 | |
628 | switch (cable_type) { |
629 | case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */ |
630 | case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */ |
631 | /* PATH:AP_USB */ |
632 | path = MAX77693_CONTROL1_SW_USB; |
633 | break; |
634 | case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */ |
635 | case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* ADC_JIG_UART_ON */ |
636 | /* PATH:AP_UART */ |
637 | path = MAX77693_CONTROL1_SW_UART; |
638 | break; |
639 | default: |
640 | dev_err(info->dev, "failed to detect %s jig cable\n" , |
641 | attached ? "attached" : "detached" ); |
642 | return -EINVAL; |
643 | } |
644 | |
645 | ret = max77693_muic_set_path(info, val: path, attached); |
646 | if (ret < 0) |
647 | return ret; |
648 | |
649 | extcon_set_state_sync(edev: info->edev, EXTCON_JIG, state: attached); |
650 | |
651 | return 0; |
652 | } |
653 | |
654 | static int max77693_muic_adc_handler(struct max77693_muic_info *info) |
655 | { |
656 | int cable_type; |
657 | int button_type; |
658 | bool attached; |
659 | int ret = 0; |
660 | |
661 | /* Check accessory state which is either detached or attached */ |
662 | cable_type = max77693_muic_get_cable_type(info, |
663 | group: MAX77693_CABLE_GROUP_ADC, attached: &attached); |
664 | |
665 | dev_info(info->dev, |
666 | "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n" , |
667 | attached ? "attached" : "detached" , cable_type, |
668 | info->prev_cable_type); |
669 | |
670 | switch (cable_type) { |
671 | case MAX77693_MUIC_ADC_GROUND: |
672 | /* USB_HOST/MHL/Audio */ |
673 | max77693_muic_adc_ground_handler(info); |
674 | break; |
675 | case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: |
676 | case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: |
677 | case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: |
678 | case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: |
679 | /* JIG */ |
680 | ret = max77693_muic_jig_handler(info, cable_type, attached); |
681 | if (ret < 0) |
682 | return ret; |
683 | break; |
684 | case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ |
685 | case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */ |
686 | case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ |
687 | /* |
688 | * DOCK device |
689 | * |
690 | * The MAX77693 MUIC device can detect total 34 cable type |
691 | * except of charger cable and MUIC device didn't define |
692 | * specfic role of cable in the range of from 0x01 to 0x12 |
693 | * of ADC value. So, can use/define cable with no role according |
694 | * to schema of hardware board. |
695 | */ |
696 | ret = max77693_muic_dock_handler(info, cable_type, attached); |
697 | if (ret < 0) |
698 | return ret; |
699 | break; |
700 | case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */ |
701 | case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */ |
702 | case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */ |
703 | case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */ |
704 | case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */ |
705 | /* |
706 | * Button of DOCK device |
707 | * - the Prev/Next/Volume Up/Volume Down/Play-Pause button |
708 | * |
709 | * The MAX77693 MUIC device can detect total 34 cable type |
710 | * except of charger cable and MUIC device didn't define |
711 | * specfic role of cable in the range of from 0x01 to 0x12 |
712 | * of ADC value. So, can use/define cable with no role according |
713 | * to schema of hardware board. |
714 | */ |
715 | if (attached) |
716 | button_type = info->prev_button_type = cable_type; |
717 | else |
718 | button_type = info->prev_button_type; |
719 | |
720 | ret = max77693_muic_dock_button_handler(info, button_type, |
721 | attached); |
722 | if (ret < 0) |
723 | return ret; |
724 | break; |
725 | case MAX77693_MUIC_ADC_SEND_END_BUTTON: |
726 | case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON: |
727 | case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON: |
728 | case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON: |
729 | case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON: |
730 | case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON: |
731 | case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON: |
732 | case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON: |
733 | case MAX77693_MUIC_ADC_RESERVED_ACC_1: |
734 | case MAX77693_MUIC_ADC_RESERVED_ACC_2: |
735 | case MAX77693_MUIC_ADC_RESERVED_ACC_4: |
736 | case MAX77693_MUIC_ADC_RESERVED_ACC_5: |
737 | case MAX77693_MUIC_ADC_CEA936_AUDIO: |
738 | case MAX77693_MUIC_ADC_PHONE_POWERED_DEV: |
739 | case MAX77693_MUIC_ADC_TTY_CONVERTER: |
740 | case MAX77693_MUIC_ADC_UART_CABLE: |
741 | case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG: |
742 | case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG: |
743 | /* |
744 | * This accessory isn't used in general case if it is specially |
745 | * needed to detect additional accessory, should implement |
746 | * proper operation when this accessory is attached/detached. |
747 | */ |
748 | dev_info(info->dev, |
749 | "accessory is %s but it isn't used (adc:0x%x)\n" , |
750 | attached ? "attached" : "detached" , cable_type); |
751 | return -EAGAIN; |
752 | default: |
753 | dev_err(info->dev, |
754 | "failed to detect %s accessory (adc:0x%x)\n" , |
755 | attached ? "attached" : "detached" , cable_type); |
756 | return -EINVAL; |
757 | } |
758 | |
759 | return 0; |
760 | } |
761 | |
762 | static int max77693_muic_chg_handler(struct max77693_muic_info *info) |
763 | { |
764 | int chg_type; |
765 | int cable_type_gnd; |
766 | int cable_type; |
767 | bool attached; |
768 | bool cable_attached; |
769 | int ret = 0; |
770 | |
771 | chg_type = max77693_muic_get_cable_type(info, |
772 | group: MAX77693_CABLE_GROUP_CHG, attached: &attached); |
773 | |
774 | dev_info(info->dev, |
775 | "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n" , |
776 | attached ? "attached" : "detached" , |
777 | chg_type, info->prev_chg_type); |
778 | |
779 | switch (chg_type) { |
780 | case MAX77693_CHARGER_TYPE_USB: |
781 | case MAX77693_CHARGER_TYPE_DEDICATED_CHG: |
782 | case MAX77693_CHARGER_TYPE_NONE: |
783 | /* Check MAX77693_CABLE_GROUP_ADC_GND type */ |
784 | cable_type_gnd = max77693_muic_get_cable_type(info, |
785 | group: MAX77693_CABLE_GROUP_ADC_GND, |
786 | attached: &cable_attached); |
787 | switch (cable_type_gnd) { |
788 | case MAX77693_MUIC_GND_MHL: |
789 | case MAX77693_MUIC_GND_MHL_VB: |
790 | /* |
791 | * MHL cable with USB/TA cable |
792 | * - MHL cable include two port(HDMI line and separate |
793 | * micro-usb port. When the target connect MHL cable, |
794 | * extcon driver check whether USB/TA cable is |
795 | * connected. If USB/TA cable is connected, extcon |
796 | * driver notify state to notifiee for charging battery. |
797 | * |
798 | * Features of 'USB/TA with MHL cable' |
799 | * - Support MHL |
800 | * - Support charging through micro-usb port without |
801 | * data connection |
802 | */ |
803 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_DCP, |
804 | state: attached); |
805 | extcon_set_state_sync(edev: info->edev, EXTCON_DISP_MHL, |
806 | state: cable_attached); |
807 | break; |
808 | } |
809 | |
810 | /* Check MAX77693_CABLE_GROUP_ADC type */ |
811 | cable_type = max77693_muic_get_cable_type(info, |
812 | group: MAX77693_CABLE_GROUP_ADC, |
813 | attached: &cable_attached); |
814 | switch (cable_type) { |
815 | case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ |
816 | /* |
817 | * Dock-Audio device with USB/TA cable |
818 | * - Dock device include two port(Dock-Audio and micro- |
819 | * usb port). When the target connect Dock-Audio device, |
820 | * extcon driver check whether USB/TA cable is connected |
821 | * or not. If USB/TA cable is connected, extcon driver |
822 | * notify state to notifiee for charging battery. |
823 | * |
824 | * Features of 'USB/TA cable with Dock-Audio device' |
825 | * - Support external output feature of audio. |
826 | * - Support charging through micro-usb port without |
827 | * data connection. |
828 | */ |
829 | extcon_set_state_sync(edev: info->edev, EXTCON_USB, |
830 | state: attached); |
831 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_SDP, |
832 | state: attached); |
833 | |
834 | if (!cable_attached) |
835 | extcon_set_state_sync(edev: info->edev, EXTCON_DOCK, |
836 | state: cable_attached); |
837 | break; |
838 | case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ |
839 | /* |
840 | * Dock-Smart device with USB/TA cable |
841 | * - Dock-Desk device include three type of cable which |
842 | * are HDMI, USB for mouse/keyboard and micro-usb port |
843 | * for USB/TA cable. Dock-Smart device need always |
844 | * exteranl power supply(USB/TA cable through micro-usb |
845 | * cable). Dock-Smart device support screen output of |
846 | * target to separate monitor and mouse/keyboard for |
847 | * desktop mode. |
848 | * |
849 | * Features of 'USB/TA cable with Dock-Smart device' |
850 | * - Support MHL |
851 | * - Support external output feature of audio |
852 | * - Support charging through micro-usb port without |
853 | * data connection if TA cable is connected to target. |
854 | * - Support charging and data connection through micro- |
855 | * usb port if USB cable is connected between target |
856 | * and host device |
857 | * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard) |
858 | */ |
859 | ret = max77693_muic_set_path(info, val: info->path_usb, |
860 | attached); |
861 | if (ret < 0) |
862 | return ret; |
863 | |
864 | extcon_set_state_sync(edev: info->edev, EXTCON_DOCK, |
865 | state: attached); |
866 | extcon_set_state_sync(edev: info->edev, EXTCON_DISP_MHL, |
867 | state: attached); |
868 | break; |
869 | } |
870 | |
871 | /* Check MAX77693_CABLE_GROUP_CHG type */ |
872 | switch (chg_type) { |
873 | case MAX77693_CHARGER_TYPE_NONE: |
874 | /* |
875 | * When MHL(with USB/TA cable) or Dock-Audio with USB/TA |
876 | * cable is attached, muic device happen below two irq. |
877 | * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting |
878 | * MHL/Dock-Audio. |
879 | * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting |
880 | * USB/TA cable connected to MHL or Dock-Audio. |
881 | * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC |
882 | * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq. |
883 | * |
884 | * If user attach MHL (with USB/TA cable and immediately |
885 | * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ |
886 | * _INT2_CHGTYP irq is happened, USB/TA cable remain |
887 | * connected state to target. But USB/TA cable isn't |
888 | * connected to target. The user be face with unusual |
889 | * action. So, driver should check this situation in |
890 | * spite of, that previous charger type is N/A. |
891 | */ |
892 | break; |
893 | case MAX77693_CHARGER_TYPE_USB: |
894 | /* Only USB cable, PATH:AP_USB */ |
895 | ret = max77693_muic_set_path(info, val: info->path_usb, |
896 | attached); |
897 | if (ret < 0) |
898 | return ret; |
899 | |
900 | extcon_set_state_sync(edev: info->edev, EXTCON_USB, |
901 | state: attached); |
902 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_SDP, |
903 | state: attached); |
904 | break; |
905 | case MAX77693_CHARGER_TYPE_DEDICATED_CHG: |
906 | /* Only TA cable */ |
907 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_DCP, |
908 | state: attached); |
909 | break; |
910 | } |
911 | break; |
912 | case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT: |
913 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_CDP, |
914 | state: attached); |
915 | break; |
916 | case MAX77693_CHARGER_TYPE_APPLE_500MA: |
917 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_SLOW, |
918 | state: attached); |
919 | break; |
920 | case MAX77693_CHARGER_TYPE_APPLE_1A_2A: |
921 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_FAST, |
922 | state: attached); |
923 | break; |
924 | case MAX77693_CHARGER_TYPE_DEAD_BATTERY: |
925 | break; |
926 | default: |
927 | dev_err(info->dev, |
928 | "failed to detect %s accessory (chg_type:0x%x)\n" , |
929 | attached ? "attached" : "detached" , chg_type); |
930 | return -EINVAL; |
931 | } |
932 | |
933 | return 0; |
934 | } |
935 | |
936 | static void max77693_muic_irq_work(struct work_struct *work) |
937 | { |
938 | struct max77693_muic_info *info = container_of(work, |
939 | struct max77693_muic_info, irq_work); |
940 | int irq_type = -1; |
941 | int i, ret = 0; |
942 | |
943 | if (!info->edev) |
944 | return; |
945 | |
946 | mutex_lock(&info->mutex); |
947 | |
948 | for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) |
949 | if (info->irq == muic_irqs[i].virq) |
950 | irq_type = muic_irqs[i].irq; |
951 | |
952 | ret = regmap_bulk_read(map: info->max77693->regmap_muic, |
953 | reg: MAX77693_MUIC_REG_STATUS1, val: info->status, val_count: 2); |
954 | if (ret) { |
955 | dev_err(info->dev, "failed to read MUIC register\n" ); |
956 | mutex_unlock(lock: &info->mutex); |
957 | return; |
958 | } |
959 | |
960 | switch (irq_type) { |
961 | case MAX77693_MUIC_IRQ_INT1_ADC: |
962 | case MAX77693_MUIC_IRQ_INT1_ADC_LOW: |
963 | case MAX77693_MUIC_IRQ_INT1_ADC_ERR: |
964 | case MAX77693_MUIC_IRQ_INT1_ADC1K: |
965 | /* |
966 | * Handle all of accessory except for |
967 | * type of charger accessory. |
968 | */ |
969 | ret = max77693_muic_adc_handler(info); |
970 | break; |
971 | case MAX77693_MUIC_IRQ_INT2_CHGTYP: |
972 | case MAX77693_MUIC_IRQ_INT2_CHGDETREUN: |
973 | case MAX77693_MUIC_IRQ_INT2_DCDTMR: |
974 | case MAX77693_MUIC_IRQ_INT2_DXOVP: |
975 | case MAX77693_MUIC_IRQ_INT2_VBVOLT: |
976 | case MAX77693_MUIC_IRQ_INT2_VIDRM: |
977 | /* Handle charger accessory */ |
978 | ret = max77693_muic_chg_handler(info); |
979 | break; |
980 | case MAX77693_MUIC_IRQ_INT3_EOC: |
981 | case MAX77693_MUIC_IRQ_INT3_CGMBC: |
982 | case MAX77693_MUIC_IRQ_INT3_OVP: |
983 | case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR: |
984 | case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED: |
985 | case MAX77693_MUIC_IRQ_INT3_BAT_DET: |
986 | break; |
987 | default: |
988 | dev_err(info->dev, "muic interrupt: irq %d occurred\n" , |
989 | irq_type); |
990 | mutex_unlock(lock: &info->mutex); |
991 | return; |
992 | } |
993 | |
994 | if (ret < 0) |
995 | dev_err(info->dev, "failed to handle MUIC interrupt\n" ); |
996 | |
997 | mutex_unlock(lock: &info->mutex); |
998 | } |
999 | |
1000 | static irqreturn_t max77693_muic_irq_handler(int irq, void *data) |
1001 | { |
1002 | struct max77693_muic_info *info = data; |
1003 | |
1004 | info->irq = irq; |
1005 | schedule_work(work: &info->irq_work); |
1006 | |
1007 | return IRQ_HANDLED; |
1008 | } |
1009 | |
1010 | static const struct regmap_config max77693_muic_regmap_config = { |
1011 | .reg_bits = 8, |
1012 | .val_bits = 8, |
1013 | }; |
1014 | |
1015 | static int max77693_muic_detect_accessory(struct max77693_muic_info *info) |
1016 | { |
1017 | int ret = 0; |
1018 | int adc; |
1019 | int chg_type; |
1020 | bool attached; |
1021 | |
1022 | mutex_lock(&info->mutex); |
1023 | |
1024 | /* Read STATUSx register to detect accessory */ |
1025 | ret = regmap_bulk_read(map: info->max77693->regmap_muic, |
1026 | reg: MAX77693_MUIC_REG_STATUS1, val: info->status, val_count: 2); |
1027 | if (ret) { |
1028 | dev_err(info->dev, "failed to read MUIC register\n" ); |
1029 | mutex_unlock(lock: &info->mutex); |
1030 | return ret; |
1031 | } |
1032 | |
1033 | adc = max77693_muic_get_cable_type(info, group: MAX77693_CABLE_GROUP_ADC, |
1034 | attached: &attached); |
1035 | if (attached && adc != MAX77693_MUIC_ADC_OPEN) { |
1036 | ret = max77693_muic_adc_handler(info); |
1037 | if (ret < 0) { |
1038 | dev_err(info->dev, "Cannot detect accessory\n" ); |
1039 | mutex_unlock(lock: &info->mutex); |
1040 | return ret; |
1041 | } |
1042 | } |
1043 | |
1044 | chg_type = max77693_muic_get_cable_type(info, group: MAX77693_CABLE_GROUP_CHG, |
1045 | attached: &attached); |
1046 | if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) { |
1047 | ret = max77693_muic_chg_handler(info); |
1048 | if (ret < 0) { |
1049 | dev_err(info->dev, "Cannot detect charger accessory\n" ); |
1050 | mutex_unlock(lock: &info->mutex); |
1051 | return ret; |
1052 | } |
1053 | } |
1054 | |
1055 | mutex_unlock(lock: &info->mutex); |
1056 | |
1057 | return 0; |
1058 | } |
1059 | |
1060 | static void max77693_muic_detect_cable_wq(struct work_struct *work) |
1061 | { |
1062 | struct max77693_muic_info *info = container_of(to_delayed_work(work), |
1063 | struct max77693_muic_info, wq_detcable); |
1064 | |
1065 | max77693_muic_detect_accessory(info); |
1066 | } |
1067 | |
1068 | static int max77693_muic_probe(struct platform_device *pdev) |
1069 | { |
1070 | struct max77693_dev *max77693 = dev_get_drvdata(dev: pdev->dev.parent); |
1071 | struct max77693_platform_data *pdata = dev_get_platdata(dev: max77693->dev); |
1072 | struct max77693_muic_info *info; |
1073 | struct max77693_reg_data *init_data; |
1074 | int num_init_data; |
1075 | int delay_jiffies; |
1076 | int cable_type; |
1077 | bool attached; |
1078 | int ret; |
1079 | int i; |
1080 | unsigned int id; |
1081 | |
1082 | info = devm_kzalloc(dev: &pdev->dev, size: sizeof(struct max77693_muic_info), |
1083 | GFP_KERNEL); |
1084 | if (!info) |
1085 | return -ENOMEM; |
1086 | |
1087 | info->dev = &pdev->dev; |
1088 | info->max77693 = max77693; |
1089 | if (info->max77693->regmap_muic) { |
1090 | dev_dbg(&pdev->dev, "allocate register map\n" ); |
1091 | } else { |
1092 | info->max77693->regmap_muic = devm_regmap_init_i2c( |
1093 | info->max77693->i2c_muic, |
1094 | &max77693_muic_regmap_config); |
1095 | if (IS_ERR(ptr: info->max77693->regmap_muic)) { |
1096 | ret = PTR_ERR(ptr: info->max77693->regmap_muic); |
1097 | dev_err(max77693->dev, |
1098 | "failed to allocate register map: %d\n" , ret); |
1099 | return ret; |
1100 | } |
1101 | } |
1102 | |
1103 | /* Register input device for button of dock device */ |
1104 | info->dock = devm_input_allocate_device(&pdev->dev); |
1105 | if (!info->dock) { |
1106 | dev_err(&pdev->dev, "%s: failed to allocate input\n" , __func__); |
1107 | return -ENOMEM; |
1108 | } |
1109 | info->dock->name = "max77693-muic/dock" ; |
1110 | info->dock->phys = "max77693-muic/extcon" ; |
1111 | info->dock->dev.parent = &pdev->dev; |
1112 | |
1113 | __set_bit(EV_REP, info->dock->evbit); |
1114 | |
1115 | input_set_capability(dev: info->dock, EV_KEY, KEY_VOLUMEUP); |
1116 | input_set_capability(dev: info->dock, EV_KEY, KEY_VOLUMEDOWN); |
1117 | input_set_capability(dev: info->dock, EV_KEY, KEY_PLAYPAUSE); |
1118 | input_set_capability(dev: info->dock, EV_KEY, KEY_PREVIOUSSONG); |
1119 | input_set_capability(dev: info->dock, EV_KEY, KEY_NEXTSONG); |
1120 | |
1121 | ret = input_register_device(info->dock); |
1122 | if (ret < 0) { |
1123 | dev_err(&pdev->dev, "Cannot register input device error(%d)\n" , |
1124 | ret); |
1125 | return ret; |
1126 | } |
1127 | |
1128 | platform_set_drvdata(pdev, data: info); |
1129 | mutex_init(&info->mutex); |
1130 | |
1131 | ret = devm_work_autocancel(dev: &pdev->dev, w: &info->irq_work, |
1132 | worker: max77693_muic_irq_work); |
1133 | if (ret) |
1134 | return ret; |
1135 | |
1136 | /* Support irq domain for MAX77693 MUIC device */ |
1137 | for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) { |
1138 | struct max77693_muic_irq *muic_irq = &muic_irqs[i]; |
1139 | int virq; |
1140 | |
1141 | virq = regmap_irq_get_virq(data: max77693->irq_data_muic, |
1142 | irq: muic_irq->irq); |
1143 | if (virq <= 0) |
1144 | return -EINVAL; |
1145 | muic_irq->virq = virq; |
1146 | |
1147 | ret = devm_request_threaded_irq(dev: &pdev->dev, irq: virq, NULL, |
1148 | thread_fn: max77693_muic_irq_handler, |
1149 | IRQF_NO_SUSPEND, |
1150 | devname: muic_irq->name, dev_id: info); |
1151 | if (ret) { |
1152 | dev_err(&pdev->dev, |
1153 | "failed: irq request (IRQ: %d, error :%d)\n" , |
1154 | muic_irq->irq, ret); |
1155 | return ret; |
1156 | } |
1157 | } |
1158 | |
1159 | /* Initialize extcon device */ |
1160 | info->edev = devm_extcon_dev_allocate(dev: &pdev->dev, |
1161 | cable: max77693_extcon_cable); |
1162 | if (IS_ERR(ptr: info->edev)) { |
1163 | dev_err(&pdev->dev, "failed to allocate memory for extcon\n" ); |
1164 | return PTR_ERR(ptr: info->edev); |
1165 | } |
1166 | |
1167 | ret = devm_extcon_dev_register(dev: &pdev->dev, edev: info->edev); |
1168 | if (ret) { |
1169 | dev_err(&pdev->dev, "failed to register extcon device\n" ); |
1170 | return ret; |
1171 | } |
1172 | |
1173 | /* Initialize MUIC register by using platform data or default data */ |
1174 | if (pdata && pdata->muic_data) { |
1175 | init_data = pdata->muic_data->init_data; |
1176 | num_init_data = pdata->muic_data->num_init_data; |
1177 | } else { |
1178 | init_data = default_init_data; |
1179 | num_init_data = ARRAY_SIZE(default_init_data); |
1180 | } |
1181 | |
1182 | for (i = 0; i < num_init_data; i++) { |
1183 | regmap_write(map: info->max77693->regmap_muic, |
1184 | reg: init_data[i].addr, |
1185 | val: init_data[i].data); |
1186 | } |
1187 | |
1188 | if (pdata && pdata->muic_data) { |
1189 | struct max77693_muic_platform_data *muic_pdata |
1190 | = pdata->muic_data; |
1191 | |
1192 | /* |
1193 | * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB |
1194 | * h/w path of COMP2/COMN1 on CONTROL1 register. |
1195 | */ |
1196 | if (muic_pdata->path_uart) |
1197 | info->path_uart = muic_pdata->path_uart; |
1198 | else |
1199 | info->path_uart = MAX77693_CONTROL1_SW_UART; |
1200 | |
1201 | if (muic_pdata->path_usb) |
1202 | info->path_usb = muic_pdata->path_usb; |
1203 | else |
1204 | info->path_usb = MAX77693_CONTROL1_SW_USB; |
1205 | |
1206 | /* |
1207 | * Default delay time for detecting cable state |
1208 | * after certain time. |
1209 | */ |
1210 | if (muic_pdata->detcable_delay_ms) |
1211 | delay_jiffies = |
1212 | msecs_to_jiffies(m: muic_pdata->detcable_delay_ms); |
1213 | else |
1214 | delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); |
1215 | } else { |
1216 | info->path_usb = MAX77693_CONTROL1_SW_USB; |
1217 | info->path_uart = MAX77693_CONTROL1_SW_UART; |
1218 | delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); |
1219 | } |
1220 | |
1221 | /* Set initial path for UART when JIG is connected to get serial logs */ |
1222 | ret = regmap_bulk_read(map: info->max77693->regmap_muic, |
1223 | reg: MAX77693_MUIC_REG_STATUS1, val: info->status, val_count: 2); |
1224 | if (ret) { |
1225 | dev_err(info->dev, "failed to read MUIC register\n" ); |
1226 | return ret; |
1227 | } |
1228 | cable_type = max77693_muic_get_cable_type(info, |
1229 | group: MAX77693_CABLE_GROUP_ADC, attached: &attached); |
1230 | if (attached && (cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON || |
1231 | cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF)) |
1232 | max77693_muic_set_path(info, val: info->path_uart, attached: true); |
1233 | |
1234 | /* Check revision number of MUIC device*/ |
1235 | ret = regmap_read(map: info->max77693->regmap_muic, |
1236 | reg: MAX77693_MUIC_REG_ID, val: &id); |
1237 | if (ret < 0) { |
1238 | dev_err(&pdev->dev, "failed to read revision number\n" ); |
1239 | return ret; |
1240 | } |
1241 | dev_info(info->dev, "device ID : 0x%x\n" , id); |
1242 | |
1243 | /* Set ADC debounce time */ |
1244 | max77693_muic_set_debounce_time(info, time: ADC_DEBOUNCE_TIME_25MS); |
1245 | |
1246 | /* |
1247 | * Detect accessory after completing the initialization of platform |
1248 | * |
1249 | * - Use delayed workqueue to detect cable state and then |
1250 | * notify cable state to notifiee/platform through uevent. |
1251 | * After completing the booting of platform, the extcon provider |
1252 | * driver should notify cable state to upper layer. |
1253 | */ |
1254 | INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq); |
1255 | queue_delayed_work(wq: system_power_efficient_wq, dwork: &info->wq_detcable, |
1256 | delay: delay_jiffies); |
1257 | |
1258 | return ret; |
1259 | } |
1260 | |
1261 | static const struct of_device_id of_max77693_muic_dt_match[] = { |
1262 | { .compatible = "maxim,max77693-muic" , }, |
1263 | { /* sentinel */ }, |
1264 | }; |
1265 | MODULE_DEVICE_TABLE(of, of_max77693_muic_dt_match); |
1266 | |
1267 | static struct platform_driver max77693_muic_driver = { |
1268 | .driver = { |
1269 | .name = DEV_NAME, |
1270 | .of_match_table = of_max77693_muic_dt_match, |
1271 | }, |
1272 | .probe = max77693_muic_probe, |
1273 | }; |
1274 | |
1275 | module_platform_driver(max77693_muic_driver); |
1276 | |
1277 | MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver" ); |
1278 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>" ); |
1279 | MODULE_LICENSE("GPL" ); |
1280 | MODULE_ALIAS("platform:max77693-muic" ); |
1281 | |