1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // |
3 | // extcon-max77843.c - Maxim MAX77843 extcon driver to support |
4 | // MUIC(Micro USB Interface Controller) |
5 | // |
6 | // Copyright (C) 2015 Samsung Electronics |
7 | // Author: Jaewon Kim <jaewon02.kim@samsung.com> |
8 | |
9 | #include <linux/extcon-provider.h> |
10 | #include <linux/i2c.h> |
11 | #include <linux/interrupt.h> |
12 | #include <linux/kernel.h> |
13 | #include <linux/mfd/max77693-common.h> |
14 | #include <linux/mfd/max77843-private.h> |
15 | #include <linux/module.h> |
16 | #include <linux/platform_device.h> |
17 | #include <linux/workqueue.h> |
18 | |
19 | #define DELAY_MS_DEFAULT 15000 /* unit: millisecond */ |
20 | |
21 | enum max77843_muic_status { |
22 | MAX77843_MUIC_STATUS1 = 0, |
23 | MAX77843_MUIC_STATUS2, |
24 | MAX77843_MUIC_STATUS3, |
25 | |
26 | MAX77843_MUIC_STATUS_NUM, |
27 | }; |
28 | |
29 | struct max77843_muic_info { |
30 | struct device *dev; |
31 | struct max77693_dev *max77843; |
32 | struct extcon_dev *edev; |
33 | |
34 | struct mutex mutex; |
35 | struct work_struct irq_work; |
36 | struct delayed_work wq_detcable; |
37 | |
38 | u8 status[MAX77843_MUIC_STATUS_NUM]; |
39 | int prev_cable_type; |
40 | int prev_chg_type; |
41 | int prev_gnd_type; |
42 | |
43 | bool irq_adc; |
44 | bool irq_chg; |
45 | }; |
46 | |
47 | enum max77843_muic_cable_group { |
48 | MAX77843_CABLE_GROUP_ADC = 0, |
49 | MAX77843_CABLE_GROUP_ADC_GND, |
50 | MAX77843_CABLE_GROUP_CHG, |
51 | }; |
52 | |
53 | enum max77843_muic_adc_debounce_time { |
54 | MAX77843_DEBOUNCE_TIME_5MS = 0, |
55 | MAX77843_DEBOUNCE_TIME_10MS, |
56 | MAX77843_DEBOUNCE_TIME_25MS, |
57 | MAX77843_DEBOUNCE_TIME_38_62MS, |
58 | }; |
59 | |
60 | /* Define accessory cable type */ |
61 | enum max77843_muic_accessory_type { |
62 | MAX77843_MUIC_ADC_GROUND = 0, |
63 | MAX77843_MUIC_ADC_SEND_END_BUTTON, |
64 | MAX77843_MUIC_ADC_REMOTE_S1_BUTTON, |
65 | MAX77843_MUIC_ADC_REMOTE_S2_BUTTON, |
66 | MAX77843_MUIC_ADC_REMOTE_S3_BUTTON, |
67 | MAX77843_MUIC_ADC_REMOTE_S4_BUTTON, |
68 | MAX77843_MUIC_ADC_REMOTE_S5_BUTTON, |
69 | MAX77843_MUIC_ADC_REMOTE_S6_BUTTON, |
70 | MAX77843_MUIC_ADC_REMOTE_S7_BUTTON, |
71 | MAX77843_MUIC_ADC_REMOTE_S8_BUTTON, |
72 | MAX77843_MUIC_ADC_REMOTE_S9_BUTTON, |
73 | MAX77843_MUIC_ADC_REMOTE_S10_BUTTON, |
74 | MAX77843_MUIC_ADC_REMOTE_S11_BUTTON, |
75 | MAX77843_MUIC_ADC_REMOTE_S12_BUTTON, |
76 | MAX77843_MUIC_ADC_RESERVED_ACC_1, |
77 | MAX77843_MUIC_ADC_RESERVED_ACC_2, |
78 | MAX77843_MUIC_ADC_RESERVED_ACC_3, /* SmartDock */ |
79 | MAX77843_MUIC_ADC_RESERVED_ACC_4, |
80 | MAX77843_MUIC_ADC_RESERVED_ACC_5, |
81 | MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2, |
82 | MAX77843_MUIC_ADC_PHONE_POWERED_DEV, |
83 | MAX77843_MUIC_ADC_TTY_CONVERTER, |
84 | MAX77843_MUIC_ADC_UART_CABLE, |
85 | MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG, |
86 | MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF, |
87 | MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON, |
88 | MAX77843_MUIC_ADC_AV_CABLE_NOLOAD, |
89 | MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG, |
90 | MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF, |
91 | MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON, |
92 | MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1, |
93 | MAX77843_MUIC_ADC_OPEN, |
94 | |
95 | /* |
96 | * The below accessories should check |
97 | * not only ADC value but also ADC1K and VBVolt value. |
98 | */ |
99 | /* Offset|ADC1K|VBVolt| */ |
100 | MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */ |
101 | MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */ |
102 | MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */ |
103 | MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */ |
104 | }; |
105 | |
106 | /* Define charger cable type */ |
107 | enum max77843_muic_charger_type { |
108 | MAX77843_MUIC_CHG_NONE = 0, |
109 | MAX77843_MUIC_CHG_USB, |
110 | MAX77843_MUIC_CHG_DOWNSTREAM, |
111 | MAX77843_MUIC_CHG_DEDICATED, |
112 | MAX77843_MUIC_CHG_SPECIAL_500MA, |
113 | MAX77843_MUIC_CHG_SPECIAL_1A, |
114 | MAX77843_MUIC_CHG_SPECIAL_BIAS, |
115 | MAX77843_MUIC_CHG_RESERVED, |
116 | MAX77843_MUIC_CHG_GND, |
117 | MAX77843_MUIC_CHG_DOCK, |
118 | }; |
119 | |
120 | static const unsigned int max77843_extcon_cable[] = { |
121 | EXTCON_USB, |
122 | EXTCON_USB_HOST, |
123 | EXTCON_CHG_USB_SDP, |
124 | EXTCON_CHG_USB_DCP, |
125 | EXTCON_CHG_USB_CDP, |
126 | EXTCON_CHG_USB_FAST, |
127 | EXTCON_CHG_USB_SLOW, |
128 | EXTCON_DISP_MHL, |
129 | EXTCON_DOCK, |
130 | EXTCON_JIG, |
131 | EXTCON_NONE, |
132 | }; |
133 | |
134 | struct max77843_muic_irq { |
135 | unsigned int irq; |
136 | const char *name; |
137 | unsigned int virq; |
138 | }; |
139 | |
140 | static struct max77843_muic_irq max77843_muic_irqs[] = { |
141 | { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" }, |
142 | { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" }, |
143 | { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" }, |
144 | { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" }, |
145 | { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" }, |
146 | { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" }, |
147 | { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" }, |
148 | { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" }, |
149 | { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" }, |
150 | { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" }, |
151 | { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" }, |
152 | { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK" }, |
153 | { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW" }, |
154 | { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF" }, |
155 | { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR" }, |
156 | { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY" }, |
157 | }; |
158 | |
159 | static const struct regmap_config max77843_muic_regmap_config = { |
160 | .reg_bits = 8, |
161 | .val_bits = 8, |
162 | .max_register = MAX77843_MUIC_REG_END, |
163 | }; |
164 | |
165 | static const struct regmap_irq max77843_muic_irq[] = { |
166 | /* INT1 interrupt */ |
167 | { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, }, |
168 | { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, }, |
169 | { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, }, |
170 | |
171 | /* INT2 interrupt */ |
172 | { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, }, |
173 | { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, }, |
174 | { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, }, |
175 | { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, }, |
176 | { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, }, |
177 | |
178 | /* INT3 interrupt */ |
179 | { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, }, |
180 | { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, }, |
181 | { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, }, |
182 | { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, }, |
183 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, }, |
184 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, }, |
185 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, }, |
186 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, }, |
187 | }; |
188 | |
189 | static const struct regmap_irq_chip max77843_muic_irq_chip = { |
190 | .name = "max77843-muic" , |
191 | .status_base = MAX77843_MUIC_REG_INT1, |
192 | .unmask_base = MAX77843_MUIC_REG_INTMASK1, |
193 | .num_regs = 3, |
194 | .irqs = max77843_muic_irq, |
195 | .num_irqs = ARRAY_SIZE(max77843_muic_irq), |
196 | }; |
197 | |
198 | static int max77843_muic_set_path(struct max77843_muic_info *info, |
199 | u8 val, bool attached, bool nobccomp) |
200 | { |
201 | struct max77693_dev *max77843 = info->max77843; |
202 | int ret = 0; |
203 | unsigned int ctrl1, ctrl2; |
204 | |
205 | if (attached) |
206 | ctrl1 = val; |
207 | else |
208 | ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN; |
209 | if (nobccomp) { |
210 | /* Disable BC1.2 protocol and force manual switch control */ |
211 | ctrl1 |= MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK; |
212 | } |
213 | |
214 | ret = regmap_update_bits(map: max77843->regmap_muic, |
215 | reg: MAX77843_MUIC_REG_CONTROL1, |
216 | MAX77843_MUIC_CONTROL1_COM_SW | |
217 | MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK, |
218 | val: ctrl1); |
219 | if (ret < 0) { |
220 | dev_err(info->dev, "Cannot switch MUIC port\n" ); |
221 | return ret; |
222 | } |
223 | |
224 | if (attached) |
225 | ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK; |
226 | else |
227 | ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK; |
228 | |
229 | ret = regmap_update_bits(map: max77843->regmap_muic, |
230 | reg: MAX77843_MUIC_REG_CONTROL2, |
231 | MAX77843_MUIC_CONTROL2_LOWPWR_MASK | |
232 | MAX77843_MUIC_CONTROL2_CPEN_MASK, val: ctrl2); |
233 | if (ret < 0) { |
234 | dev_err(info->dev, "Cannot update lowpower mode\n" ); |
235 | return ret; |
236 | } |
237 | |
238 | dev_dbg(info->dev, |
239 | "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n" , |
240 | ctrl1, ctrl2, attached ? "attached" : "detached" ); |
241 | |
242 | return 0; |
243 | } |
244 | |
245 | static void max77843_charger_set_otg_vbus(struct max77843_muic_info *info, |
246 | bool on) |
247 | { |
248 | struct max77693_dev *max77843 = info->max77843; |
249 | unsigned int cnfg00; |
250 | |
251 | if (on) |
252 | cnfg00 = MAX77843_CHG_OTG_MASK | MAX77843_CHG_BOOST_MASK; |
253 | else |
254 | cnfg00 = MAX77843_CHG_ENABLE | MAX77843_CHG_BUCK_MASK; |
255 | |
256 | regmap_update_bits(map: max77843->regmap_chg, reg: MAX77843_CHG_REG_CHG_CNFG_00, |
257 | MAX77843_CHG_MODE_MASK, val: cnfg00); |
258 | } |
259 | |
260 | static int max77843_muic_get_cable_type(struct max77843_muic_info *info, |
261 | enum max77843_muic_cable_group group, bool *attached) |
262 | { |
263 | int adc, chg_type, cable_type, gnd_type; |
264 | |
265 | adc = info->status[MAX77843_MUIC_STATUS1] & |
266 | MAX77843_MUIC_STATUS1_ADC_MASK; |
267 | adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT; |
268 | |
269 | switch (group) { |
270 | case MAX77843_CABLE_GROUP_ADC: |
271 | if (adc == MAX77843_MUIC_ADC_OPEN) { |
272 | *attached = false; |
273 | cable_type = info->prev_cable_type; |
274 | info->prev_cable_type = MAX77843_MUIC_ADC_OPEN; |
275 | } else { |
276 | *attached = true; |
277 | cable_type = info->prev_cable_type = adc; |
278 | } |
279 | break; |
280 | case MAX77843_CABLE_GROUP_CHG: |
281 | chg_type = info->status[MAX77843_MUIC_STATUS2] & |
282 | MAX77843_MUIC_STATUS2_CHGTYP_MASK; |
283 | |
284 | /* Check GROUND accessory with charger cable */ |
285 | if (adc == MAX77843_MUIC_ADC_GROUND) { |
286 | if (chg_type == MAX77843_MUIC_CHG_NONE) { |
287 | /* |
288 | * The following state when charger cable is |
289 | * disconnected but the GROUND accessory still |
290 | * connected. |
291 | */ |
292 | *attached = false; |
293 | cable_type = info->prev_chg_type; |
294 | info->prev_chg_type = MAX77843_MUIC_CHG_NONE; |
295 | } else { |
296 | |
297 | /* |
298 | * The following state when charger cable is |
299 | * connected on the GROUND accessory. |
300 | */ |
301 | *attached = true; |
302 | cable_type = MAX77843_MUIC_CHG_GND; |
303 | info->prev_chg_type = MAX77843_MUIC_CHG_GND; |
304 | } |
305 | break; |
306 | } |
307 | |
308 | if (adc == MAX77843_MUIC_ADC_RESERVED_ACC_3) { /* SmartDock */ |
309 | if (chg_type == MAX77843_MUIC_CHG_NONE) { |
310 | *attached = false; |
311 | cable_type = info->prev_chg_type; |
312 | info->prev_chg_type = MAX77843_MUIC_CHG_NONE; |
313 | } else { |
314 | *attached = true; |
315 | cable_type = MAX77843_MUIC_CHG_DOCK; |
316 | info->prev_chg_type = MAX77843_MUIC_CHG_DOCK; |
317 | } |
318 | break; |
319 | } |
320 | |
321 | if (chg_type == MAX77843_MUIC_CHG_NONE) { |
322 | *attached = false; |
323 | cable_type = info->prev_chg_type; |
324 | info->prev_chg_type = MAX77843_MUIC_CHG_NONE; |
325 | } else { |
326 | *attached = true; |
327 | cable_type = info->prev_chg_type = chg_type; |
328 | } |
329 | break; |
330 | case MAX77843_CABLE_GROUP_ADC_GND: |
331 | if (adc == MAX77843_MUIC_ADC_OPEN) { |
332 | *attached = false; |
333 | cable_type = info->prev_gnd_type; |
334 | info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN; |
335 | } else { |
336 | *attached = true; |
337 | |
338 | /* |
339 | * Offset|ADC1K|VBVolt| |
340 | * 0x1| 0| 0| USB-HOST |
341 | * 0x1| 0| 1| USB-HOST with VB |
342 | * 0x1| 1| 0| MHL |
343 | * 0x1| 1| 1| MHL with VB |
344 | */ |
345 | /* Get ADC1K register bit */ |
346 | gnd_type = (info->status[MAX77843_MUIC_STATUS1] & |
347 | MAX77843_MUIC_STATUS1_ADC1K_MASK); |
348 | |
349 | /* Get VBVolt register bit */ |
350 | gnd_type |= (info->status[MAX77843_MUIC_STATUS2] & |
351 | MAX77843_MUIC_STATUS2_VBVOLT_MASK); |
352 | gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT; |
353 | |
354 | /* Offset of GND cable */ |
355 | gnd_type |= MAX77843_MUIC_GND_USB_HOST; |
356 | cable_type = info->prev_gnd_type = gnd_type; |
357 | } |
358 | break; |
359 | default: |
360 | dev_err(info->dev, "Unknown cable group (%d)\n" , group); |
361 | cable_type = -EINVAL; |
362 | break; |
363 | } |
364 | |
365 | return cable_type; |
366 | } |
367 | |
368 | static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info) |
369 | { |
370 | int ret, gnd_cable_type; |
371 | bool attached; |
372 | |
373 | gnd_cable_type = max77843_muic_get_cable_type(info, |
374 | group: MAX77843_CABLE_GROUP_ADC_GND, attached: &attached); |
375 | dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n" , |
376 | attached ? "attached" : "detached" , gnd_cable_type); |
377 | |
378 | switch (gnd_cable_type) { |
379 | case MAX77843_MUIC_GND_USB_HOST: |
380 | case MAX77843_MUIC_GND_USB_HOST_VB: |
381 | ret = max77843_muic_set_path(info, |
382 | MAX77843_MUIC_CONTROL1_SW_USB, |
383 | attached, nobccomp: false); |
384 | if (ret < 0) |
385 | return ret; |
386 | |
387 | extcon_set_state_sync(edev: info->edev, EXTCON_USB_HOST, state: attached); |
388 | max77843_charger_set_otg_vbus(info, on: attached); |
389 | break; |
390 | case MAX77843_MUIC_GND_MHL_VB: |
391 | case MAX77843_MUIC_GND_MHL: |
392 | ret = max77843_muic_set_path(info, |
393 | MAX77843_MUIC_CONTROL1_SW_OPEN, |
394 | attached, nobccomp: false); |
395 | if (ret < 0) |
396 | return ret; |
397 | |
398 | extcon_set_state_sync(edev: info->edev, EXTCON_DISP_MHL, state: attached); |
399 | break; |
400 | default: |
401 | dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n" , |
402 | attached ? "attached" : "detached" , gnd_cable_type); |
403 | return -EINVAL; |
404 | } |
405 | |
406 | return 0; |
407 | } |
408 | |
409 | static int max77843_muic_jig_handler(struct max77843_muic_info *info, |
410 | int cable_type, bool attached) |
411 | { |
412 | int ret; |
413 | u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN; |
414 | |
415 | dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n" , |
416 | attached ? "attached" : "detached" , cable_type); |
417 | |
418 | switch (cable_type) { |
419 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: |
420 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: |
421 | path = MAX77843_MUIC_CONTROL1_SW_USB; |
422 | break; |
423 | case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: |
424 | path = MAX77843_MUIC_CONTROL1_SW_UART; |
425 | break; |
426 | default: |
427 | return -EINVAL; |
428 | } |
429 | |
430 | ret = max77843_muic_set_path(info, val: path, attached, nobccomp: false); |
431 | if (ret < 0) |
432 | return ret; |
433 | |
434 | extcon_set_state_sync(edev: info->edev, EXTCON_JIG, state: attached); |
435 | |
436 | return 0; |
437 | } |
438 | |
439 | static int max77843_muic_dock_handler(struct max77843_muic_info *info, |
440 | bool attached) |
441 | { |
442 | int ret; |
443 | |
444 | dev_dbg(info->dev, "external connector is %s (adc: 0x10)\n" , |
445 | attached ? "attached" : "detached" ); |
446 | |
447 | ret = max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_USB, |
448 | attached, nobccomp: attached); |
449 | if (ret < 0) |
450 | return ret; |
451 | |
452 | extcon_set_state_sync(edev: info->edev, EXTCON_DISP_MHL, state: attached); |
453 | extcon_set_state_sync(edev: info->edev, EXTCON_USB_HOST, state: attached); |
454 | extcon_set_state_sync(edev: info->edev, EXTCON_DOCK, state: attached); |
455 | |
456 | return 0; |
457 | } |
458 | |
459 | static int max77843_muic_adc_handler(struct max77843_muic_info *info) |
460 | { |
461 | int ret, cable_type; |
462 | bool attached; |
463 | |
464 | cable_type = max77843_muic_get_cable_type(info, |
465 | group: MAX77843_CABLE_GROUP_ADC, attached: &attached); |
466 | |
467 | dev_dbg(info->dev, |
468 | "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n" , |
469 | attached ? "attached" : "detached" , cable_type, |
470 | info->prev_cable_type); |
471 | |
472 | switch (cable_type) { |
473 | case MAX77843_MUIC_ADC_RESERVED_ACC_3: /* SmartDock */ |
474 | ret = max77843_muic_dock_handler(info, attached); |
475 | if (ret < 0) |
476 | return ret; |
477 | break; |
478 | case MAX77843_MUIC_ADC_GROUND: |
479 | ret = max77843_muic_adc_gnd_handler(info); |
480 | if (ret < 0) |
481 | return ret; |
482 | break; |
483 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: |
484 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: |
485 | case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: |
486 | ret = max77843_muic_jig_handler(info, cable_type, attached); |
487 | if (ret < 0) |
488 | return ret; |
489 | break; |
490 | case MAX77843_MUIC_ADC_SEND_END_BUTTON: |
491 | case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON: |
492 | case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON: |
493 | case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON: |
494 | case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON: |
495 | case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON: |
496 | case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON: |
497 | case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON: |
498 | case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON: |
499 | case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON: |
500 | case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON: |
501 | case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON: |
502 | case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON: |
503 | case MAX77843_MUIC_ADC_RESERVED_ACC_1: |
504 | case MAX77843_MUIC_ADC_RESERVED_ACC_2: |
505 | case MAX77843_MUIC_ADC_RESERVED_ACC_4: |
506 | case MAX77843_MUIC_ADC_RESERVED_ACC_5: |
507 | case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2: |
508 | case MAX77843_MUIC_ADC_PHONE_POWERED_DEV: |
509 | case MAX77843_MUIC_ADC_TTY_CONVERTER: |
510 | case MAX77843_MUIC_ADC_UART_CABLE: |
511 | case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG: |
512 | case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD: |
513 | case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG: |
514 | case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON: |
515 | case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1: |
516 | case MAX77843_MUIC_ADC_OPEN: |
517 | dev_err(info->dev, |
518 | "accessory is %s but it isn't used (adc:0x%x)\n" , |
519 | attached ? "attached" : "detached" , cable_type); |
520 | return -EAGAIN; |
521 | default: |
522 | dev_err(info->dev, |
523 | "failed to detect %s accessory (adc:0x%x)\n" , |
524 | attached ? "attached" : "detached" , cable_type); |
525 | return -EINVAL; |
526 | } |
527 | |
528 | return 0; |
529 | } |
530 | |
531 | static int max77843_muic_chg_handler(struct max77843_muic_info *info) |
532 | { |
533 | int ret, chg_type, gnd_type; |
534 | bool attached; |
535 | |
536 | chg_type = max77843_muic_get_cable_type(info, |
537 | group: MAX77843_CABLE_GROUP_CHG, attached: &attached); |
538 | |
539 | dev_dbg(info->dev, |
540 | "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n" , |
541 | attached ? "attached" : "detached" , |
542 | chg_type, info->prev_chg_type); |
543 | |
544 | switch (chg_type) { |
545 | case MAX77843_MUIC_CHG_USB: |
546 | ret = max77843_muic_set_path(info, |
547 | MAX77843_MUIC_CONTROL1_SW_USB, |
548 | attached, nobccomp: false); |
549 | if (ret < 0) |
550 | return ret; |
551 | |
552 | extcon_set_state_sync(edev: info->edev, EXTCON_USB, state: attached); |
553 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_SDP, |
554 | state: attached); |
555 | break; |
556 | case MAX77843_MUIC_CHG_DOWNSTREAM: |
557 | ret = max77843_muic_set_path(info, |
558 | MAX77843_MUIC_CONTROL1_SW_OPEN, |
559 | attached, nobccomp: false); |
560 | if (ret < 0) |
561 | return ret; |
562 | |
563 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_CDP, |
564 | state: attached); |
565 | break; |
566 | case MAX77843_MUIC_CHG_DEDICATED: |
567 | ret = max77843_muic_set_path(info, |
568 | MAX77843_MUIC_CONTROL1_SW_OPEN, |
569 | attached, nobccomp: false); |
570 | if (ret < 0) |
571 | return ret; |
572 | |
573 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_DCP, |
574 | state: attached); |
575 | break; |
576 | case MAX77843_MUIC_CHG_SPECIAL_500MA: |
577 | ret = max77843_muic_set_path(info, |
578 | MAX77843_MUIC_CONTROL1_SW_OPEN, |
579 | attached, nobccomp: false); |
580 | if (ret < 0) |
581 | return ret; |
582 | |
583 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_SLOW, |
584 | state: attached); |
585 | break; |
586 | case MAX77843_MUIC_CHG_SPECIAL_1A: |
587 | ret = max77843_muic_set_path(info, |
588 | MAX77843_MUIC_CONTROL1_SW_OPEN, |
589 | attached, nobccomp: false); |
590 | if (ret < 0) |
591 | return ret; |
592 | |
593 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_FAST, |
594 | state: attached); |
595 | break; |
596 | case MAX77843_MUIC_CHG_GND: |
597 | gnd_type = max77843_muic_get_cable_type(info, |
598 | group: MAX77843_CABLE_GROUP_ADC_GND, attached: &attached); |
599 | |
600 | /* Charger cable on MHL accessory is attach or detach */ |
601 | if (gnd_type == MAX77843_MUIC_GND_MHL_VB) |
602 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_DCP, |
603 | state: true); |
604 | else if (gnd_type == MAX77843_MUIC_GND_MHL) |
605 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_DCP, |
606 | state: false); |
607 | break; |
608 | case MAX77843_MUIC_CHG_DOCK: |
609 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_DCP, state: attached); |
610 | break; |
611 | case MAX77843_MUIC_CHG_NONE: |
612 | break; |
613 | default: |
614 | dev_err(info->dev, |
615 | "failed to detect %s accessory (chg_type:0x%x)\n" , |
616 | attached ? "attached" : "detached" , chg_type); |
617 | |
618 | max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN, |
619 | attached, nobccomp: false); |
620 | return -EINVAL; |
621 | } |
622 | |
623 | return 0; |
624 | } |
625 | |
626 | static void max77843_muic_irq_work(struct work_struct *work) |
627 | { |
628 | struct max77843_muic_info *info = container_of(work, |
629 | struct max77843_muic_info, irq_work); |
630 | struct max77693_dev *max77843 = info->max77843; |
631 | int ret = 0; |
632 | |
633 | mutex_lock(&info->mutex); |
634 | |
635 | ret = regmap_bulk_read(map: max77843->regmap_muic, |
636 | reg: MAX77843_MUIC_REG_STATUS1, val: info->status, |
637 | val_count: MAX77843_MUIC_STATUS_NUM); |
638 | if (ret) { |
639 | dev_err(info->dev, "Cannot read STATUS registers\n" ); |
640 | mutex_unlock(lock: &info->mutex); |
641 | return; |
642 | } |
643 | |
644 | if (info->irq_adc) { |
645 | ret = max77843_muic_adc_handler(info); |
646 | if (ret) |
647 | dev_err(info->dev, "Unknown cable type\n" ); |
648 | info->irq_adc = false; |
649 | } |
650 | |
651 | if (info->irq_chg) { |
652 | ret = max77843_muic_chg_handler(info); |
653 | if (ret) |
654 | dev_err(info->dev, "Unknown charger type\n" ); |
655 | info->irq_chg = false; |
656 | } |
657 | |
658 | mutex_unlock(lock: &info->mutex); |
659 | } |
660 | |
661 | static irqreturn_t max77843_muic_irq_handler(int irq, void *data) |
662 | { |
663 | struct max77843_muic_info *info = data; |
664 | int i, irq_type = -1; |
665 | |
666 | for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) |
667 | if (irq == max77843_muic_irqs[i].virq) |
668 | irq_type = max77843_muic_irqs[i].irq; |
669 | |
670 | switch (irq_type) { |
671 | case MAX77843_MUIC_IRQ_INT1_ADC: |
672 | case MAX77843_MUIC_IRQ_INT1_ADCERROR: |
673 | case MAX77843_MUIC_IRQ_INT1_ADC1K: |
674 | info->irq_adc = true; |
675 | break; |
676 | case MAX77843_MUIC_IRQ_INT2_CHGTYP: |
677 | case MAX77843_MUIC_IRQ_INT2_CHGDETRUN: |
678 | case MAX77843_MUIC_IRQ_INT2_DCDTMR: |
679 | case MAX77843_MUIC_IRQ_INT2_DXOVP: |
680 | case MAX77843_MUIC_IRQ_INT2_VBVOLT: |
681 | info->irq_chg = true; |
682 | break; |
683 | case MAX77843_MUIC_IRQ_INT3_VBADC: |
684 | case MAX77843_MUIC_IRQ_INT3_VDNMON: |
685 | case MAX77843_MUIC_IRQ_INT3_DNRES: |
686 | case MAX77843_MUIC_IRQ_INT3_MPNACK: |
687 | case MAX77843_MUIC_IRQ_INT3_MRXBUFOW: |
688 | case MAX77843_MUIC_IRQ_INT3_MRXTRF: |
689 | case MAX77843_MUIC_IRQ_INT3_MRXPERR: |
690 | case MAX77843_MUIC_IRQ_INT3_MRXRDY: |
691 | break; |
692 | default: |
693 | dev_err(info->dev, "Cannot recognize IRQ(%d)\n" , irq_type); |
694 | break; |
695 | } |
696 | |
697 | schedule_work(work: &info->irq_work); |
698 | |
699 | return IRQ_HANDLED; |
700 | } |
701 | |
702 | static void max77843_muic_detect_cable_wq(struct work_struct *work) |
703 | { |
704 | struct max77843_muic_info *info = container_of(to_delayed_work(work), |
705 | struct max77843_muic_info, wq_detcable); |
706 | struct max77693_dev *max77843 = info->max77843; |
707 | int chg_type, adc, ret; |
708 | bool attached; |
709 | |
710 | mutex_lock(&info->mutex); |
711 | |
712 | ret = regmap_bulk_read(map: max77843->regmap_muic, |
713 | reg: MAX77843_MUIC_REG_STATUS1, val: info->status, |
714 | val_count: MAX77843_MUIC_STATUS_NUM); |
715 | if (ret) { |
716 | dev_err(info->dev, "Cannot read STATUS registers\n" ); |
717 | goto err_cable_wq; |
718 | } |
719 | |
720 | adc = max77843_muic_get_cable_type(info, |
721 | group: MAX77843_CABLE_GROUP_ADC, attached: &attached); |
722 | if (attached && adc != MAX77843_MUIC_ADC_OPEN) { |
723 | ret = max77843_muic_adc_handler(info); |
724 | if (ret < 0) { |
725 | dev_err(info->dev, "Cannot detect accessory\n" ); |
726 | goto err_cable_wq; |
727 | } |
728 | } |
729 | |
730 | chg_type = max77843_muic_get_cable_type(info, |
731 | group: MAX77843_CABLE_GROUP_CHG, attached: &attached); |
732 | if (attached && chg_type != MAX77843_MUIC_CHG_NONE) { |
733 | ret = max77843_muic_chg_handler(info); |
734 | if (ret < 0) { |
735 | dev_err(info->dev, "Cannot detect charger accessory\n" ); |
736 | goto err_cable_wq; |
737 | } |
738 | } |
739 | |
740 | err_cable_wq: |
741 | mutex_unlock(lock: &info->mutex); |
742 | } |
743 | |
744 | static int max77843_muic_set_debounce_time(struct max77843_muic_info *info, |
745 | enum max77843_muic_adc_debounce_time time) |
746 | { |
747 | struct max77693_dev *max77843 = info->max77843; |
748 | int ret; |
749 | |
750 | switch (time) { |
751 | case MAX77843_DEBOUNCE_TIME_5MS: |
752 | case MAX77843_DEBOUNCE_TIME_10MS: |
753 | case MAX77843_DEBOUNCE_TIME_25MS: |
754 | case MAX77843_DEBOUNCE_TIME_38_62MS: |
755 | ret = regmap_update_bits(map: max77843->regmap_muic, |
756 | reg: MAX77843_MUIC_REG_CONTROL4, |
757 | MAX77843_MUIC_CONTROL4_ADCDBSET_MASK, |
758 | val: time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT); |
759 | if (ret < 0) { |
760 | dev_err(info->dev, "Cannot write MUIC regmap\n" ); |
761 | return ret; |
762 | } |
763 | break; |
764 | default: |
765 | dev_err(info->dev, "Invalid ADC debounce time\n" ); |
766 | return -EINVAL; |
767 | } |
768 | |
769 | return 0; |
770 | } |
771 | |
772 | static int max77843_init_muic_regmap(struct max77693_dev *max77843) |
773 | { |
774 | int ret; |
775 | |
776 | max77843->i2c_muic = i2c_new_dummy_device(adapter: max77843->i2c->adapter, |
777 | I2C_ADDR_MUIC); |
778 | if (IS_ERR(ptr: max77843->i2c_muic)) { |
779 | dev_err(&max77843->i2c->dev, |
780 | "Cannot allocate I2C device for MUIC\n" ); |
781 | return PTR_ERR(ptr: max77843->i2c_muic); |
782 | } |
783 | |
784 | i2c_set_clientdata(client: max77843->i2c_muic, data: max77843); |
785 | |
786 | max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic, |
787 | &max77843_muic_regmap_config); |
788 | if (IS_ERR(ptr: max77843->regmap_muic)) { |
789 | ret = PTR_ERR(ptr: max77843->regmap_muic); |
790 | goto err_muic_i2c; |
791 | } |
792 | |
793 | ret = regmap_add_irq_chip(map: max77843->regmap_muic, irq: max77843->irq, |
794 | IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, |
795 | irq_base: 0, chip: &max77843_muic_irq_chip, data: &max77843->irq_data_muic); |
796 | if (ret < 0) { |
797 | dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n" ); |
798 | goto err_muic_i2c; |
799 | } |
800 | |
801 | return 0; |
802 | |
803 | err_muic_i2c: |
804 | i2c_unregister_device(client: max77843->i2c_muic); |
805 | |
806 | return ret; |
807 | } |
808 | |
809 | static int max77843_muic_probe(struct platform_device *pdev) |
810 | { |
811 | struct max77693_dev *max77843 = dev_get_drvdata(dev: pdev->dev.parent); |
812 | struct max77843_muic_info *info; |
813 | unsigned int id; |
814 | int cable_type; |
815 | bool attached; |
816 | int i, ret; |
817 | |
818 | info = devm_kzalloc(dev: &pdev->dev, size: sizeof(*info), GFP_KERNEL); |
819 | if (!info) |
820 | return -ENOMEM; |
821 | |
822 | info->dev = &pdev->dev; |
823 | info->max77843 = max77843; |
824 | |
825 | platform_set_drvdata(pdev, data: info); |
826 | mutex_init(&info->mutex); |
827 | |
828 | /* Initialize i2c and regmap */ |
829 | ret = max77843_init_muic_regmap(max77843); |
830 | if (ret) { |
831 | dev_err(&pdev->dev, "Failed to init MUIC regmap\n" ); |
832 | return ret; |
833 | } |
834 | |
835 | /* Turn off auto detection configuration */ |
836 | ret = regmap_update_bits(map: max77843->regmap_muic, |
837 | reg: MAX77843_MUIC_REG_CONTROL4, |
838 | MAX77843_MUIC_CONTROL4_USBAUTO_MASK | |
839 | MAX77843_MUIC_CONTROL4_FCTAUTO_MASK, |
840 | CONTROL4_AUTO_DISABLE); |
841 | |
842 | /* Initialize extcon device */ |
843 | info->edev = devm_extcon_dev_allocate(dev: &pdev->dev, |
844 | cable: max77843_extcon_cable); |
845 | if (IS_ERR(ptr: info->edev)) { |
846 | dev_err(&pdev->dev, "Failed to allocate memory for extcon\n" ); |
847 | ret = PTR_ERR(ptr: info->edev); |
848 | goto err_muic_irq; |
849 | } |
850 | |
851 | ret = devm_extcon_dev_register(dev: &pdev->dev, edev: info->edev); |
852 | if (ret) { |
853 | dev_err(&pdev->dev, "Failed to register extcon device\n" ); |
854 | goto err_muic_irq; |
855 | } |
856 | |
857 | /* Set ADC debounce time */ |
858 | max77843_muic_set_debounce_time(info, time: MAX77843_DEBOUNCE_TIME_25MS); |
859 | |
860 | /* Set initial path for UART when JIG is connected to get serial logs */ |
861 | ret = regmap_bulk_read(map: max77843->regmap_muic, |
862 | reg: MAX77843_MUIC_REG_STATUS1, val: info->status, |
863 | val_count: MAX77843_MUIC_STATUS_NUM); |
864 | if (ret) { |
865 | dev_err(info->dev, "Cannot read STATUS registers\n" ); |
866 | goto err_muic_irq; |
867 | } |
868 | cable_type = max77843_muic_get_cable_type(info, group: MAX77843_CABLE_GROUP_ADC, |
869 | attached: &attached); |
870 | if (attached && cable_type == MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF) |
871 | max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, |
872 | attached: true, nobccomp: false); |
873 | |
874 | /* Check revision number of MUIC device */ |
875 | ret = regmap_read(map: max77843->regmap_muic, reg: MAX77843_MUIC_REG_ID, val: &id); |
876 | if (ret < 0) { |
877 | dev_err(&pdev->dev, "Failed to read revision number\n" ); |
878 | goto err_muic_irq; |
879 | } |
880 | dev_info(info->dev, "MUIC device ID : 0x%x\n" , id); |
881 | |
882 | /* Support virtual irq domain for max77843 MUIC device */ |
883 | INIT_WORK(&info->irq_work, max77843_muic_irq_work); |
884 | |
885 | /* Clear IRQ bits before request IRQs */ |
886 | ret = regmap_bulk_read(map: max77843->regmap_muic, |
887 | reg: MAX77843_MUIC_REG_INT1, val: info->status, |
888 | val_count: MAX77843_MUIC_STATUS_NUM); |
889 | if (ret) { |
890 | dev_err(&pdev->dev, "Failed to Clear IRQ bits\n" ); |
891 | goto err_muic_irq; |
892 | } |
893 | |
894 | for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) { |
895 | struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i]; |
896 | int virq = 0; |
897 | |
898 | virq = regmap_irq_get_virq(data: max77843->irq_data_muic, |
899 | irq: muic_irq->irq); |
900 | if (virq <= 0) { |
901 | ret = -EINVAL; |
902 | goto err_muic_irq; |
903 | } |
904 | muic_irq->virq = virq; |
905 | |
906 | ret = devm_request_threaded_irq(dev: &pdev->dev, irq: virq, NULL, |
907 | thread_fn: max77843_muic_irq_handler, IRQF_NO_SUSPEND, |
908 | devname: muic_irq->name, dev_id: info); |
909 | if (ret) { |
910 | dev_err(&pdev->dev, |
911 | "Failed to request irq (IRQ: %d, error: %d)\n" , |
912 | muic_irq->irq, ret); |
913 | goto err_muic_irq; |
914 | } |
915 | } |
916 | |
917 | /* Detect accessory after completing the initialization of platform */ |
918 | INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq); |
919 | queue_delayed_work(wq: system_power_efficient_wq, |
920 | dwork: &info->wq_detcable, delay: msecs_to_jiffies(DELAY_MS_DEFAULT)); |
921 | |
922 | return 0; |
923 | |
924 | err_muic_irq: |
925 | regmap_del_irq_chip(irq: max77843->irq, data: max77843->irq_data_muic); |
926 | i2c_unregister_device(client: max77843->i2c_muic); |
927 | |
928 | return ret; |
929 | } |
930 | |
931 | static int max77843_muic_remove(struct platform_device *pdev) |
932 | { |
933 | struct max77843_muic_info *info = platform_get_drvdata(pdev); |
934 | struct max77693_dev *max77843 = info->max77843; |
935 | |
936 | cancel_work_sync(work: &info->irq_work); |
937 | regmap_del_irq_chip(irq: max77843->irq, data: max77843->irq_data_muic); |
938 | i2c_unregister_device(client: max77843->i2c_muic); |
939 | |
940 | return 0; |
941 | } |
942 | |
943 | static const struct platform_device_id max77843_muic_id[] = { |
944 | { "max77843-muic" , }, |
945 | { /* sentinel */ }, |
946 | }; |
947 | MODULE_DEVICE_TABLE(platform, max77843_muic_id); |
948 | |
949 | static const struct of_device_id of_max77843_muic_dt_match[] = { |
950 | { .compatible = "maxim,max77843-muic" , }, |
951 | { /* sentinel */ }, |
952 | }; |
953 | MODULE_DEVICE_TABLE(of, of_max77843_muic_dt_match); |
954 | |
955 | static struct platform_driver max77843_muic_driver = { |
956 | .driver = { |
957 | .name = "max77843-muic" , |
958 | .of_match_table = of_max77843_muic_dt_match, |
959 | }, |
960 | .probe = max77843_muic_probe, |
961 | .remove = max77843_muic_remove, |
962 | .id_table = max77843_muic_id, |
963 | }; |
964 | |
965 | static int __init max77843_muic_init(void) |
966 | { |
967 | return platform_driver_register(&max77843_muic_driver); |
968 | } |
969 | subsys_initcall(max77843_muic_init); |
970 | |
971 | MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver" ); |
972 | MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>" ); |
973 | MODULE_LICENSE("GPL" ); |
974 | |