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path: root/drivers/extcon/extcon-max77843.c
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Diffstat (limited to 'drivers/extcon/extcon-max77843.c')
-rw-r--r--drivers/extcon/extcon-max77843.c881
1 files changed, 881 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-max77843.c b/drivers/extcon/extcon-max77843.c
new file mode 100644
index 000000000000..8db6a926ea07
--- /dev/null
+++ b/drivers/extcon/extcon-max77843.c
@@ -0,0 +1,881 @@
1/*
2 * extcon-max77843.c - Maxim MAX77843 extcon driver to support
3 * MUIC(Micro USB Interface Controller)
4 *
5 * Copyright (C) 2015 Samsung Electronics
6 * Author: Jaewon Kim <jaewon02.kim@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14#include <linux/extcon.h>
15#include <linux/i2c.h>
16#include <linux/interrupt.h>
17#include <linux/kernel.h>
18#include <linux/mfd/max77843-private.h>
19#include <linux/module.h>
20#include <linux/platform_device.h>
21#include <linux/workqueue.h>
22
23#define DELAY_MS_DEFAULT 15000 /* unit: millisecond */
24
25enum max77843_muic_status {
26 MAX77843_MUIC_STATUS1 = 0,
27 MAX77843_MUIC_STATUS2,
28 MAX77843_MUIC_STATUS3,
29
30 MAX77843_MUIC_STATUS_NUM,
31};
32
33struct max77843_muic_info {
34 struct device *dev;
35 struct max77843 *max77843;
36 struct extcon_dev *edev;
37
38 struct mutex mutex;
39 struct work_struct irq_work;
40 struct delayed_work wq_detcable;
41
42 u8 status[MAX77843_MUIC_STATUS_NUM];
43 int prev_cable_type;
44 int prev_chg_type;
45 int prev_gnd_type;
46
47 bool irq_adc;
48 bool irq_chg;
49};
50
51enum max77843_muic_cable_group {
52 MAX77843_CABLE_GROUP_ADC = 0,
53 MAX77843_CABLE_GROUP_ADC_GND,
54 MAX77843_CABLE_GROUP_CHG,
55};
56
57enum max77843_muic_adc_debounce_time {
58 MAX77843_DEBOUNCE_TIME_5MS = 0,
59 MAX77843_DEBOUNCE_TIME_10MS,
60 MAX77843_DEBOUNCE_TIME_25MS,
61 MAX77843_DEBOUNCE_TIME_38_62MS,
62};
63
64/* Define accessory cable type */
65enum max77843_muic_accessory_type {
66 MAX77843_MUIC_ADC_GROUND = 0,
67 MAX77843_MUIC_ADC_SEND_END_BUTTON,
68 MAX77843_MUIC_ADC_REMOTE_S1_BUTTON,
69 MAX77843_MUIC_ADC_REMOTE_S2_BUTTON,
70 MAX77843_MUIC_ADC_REMOTE_S3_BUTTON,
71 MAX77843_MUIC_ADC_REMOTE_S4_BUTTON,
72 MAX77843_MUIC_ADC_REMOTE_S5_BUTTON,
73 MAX77843_MUIC_ADC_REMOTE_S6_BUTTON,
74 MAX77843_MUIC_ADC_REMOTE_S7_BUTTON,
75 MAX77843_MUIC_ADC_REMOTE_S8_BUTTON,
76 MAX77843_MUIC_ADC_REMOTE_S9_BUTTON,
77 MAX77843_MUIC_ADC_REMOTE_S10_BUTTON,
78 MAX77843_MUIC_ADC_REMOTE_S11_BUTTON,
79 MAX77843_MUIC_ADC_REMOTE_S12_BUTTON,
80 MAX77843_MUIC_ADC_RESERVED_ACC_1,
81 MAX77843_MUIC_ADC_RESERVED_ACC_2,
82 MAX77843_MUIC_ADC_RESERVED_ACC_3,
83 MAX77843_MUIC_ADC_RESERVED_ACC_4,
84 MAX77843_MUIC_ADC_RESERVED_ACC_5,
85 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2,
86 MAX77843_MUIC_ADC_PHONE_POWERED_DEV,
87 MAX77843_MUIC_ADC_TTY_CONVERTER,
88 MAX77843_MUIC_ADC_UART_CABLE,
89 MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG,
90 MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF,
91 MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON,
92 MAX77843_MUIC_ADC_AV_CABLE_NOLOAD,
93 MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG,
94 MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF,
95 MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON,
96 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1,
97 MAX77843_MUIC_ADC_OPEN,
98
99 /* The blow accessories should check
100 not only ADC value but also ADC1K and VBVolt value. */
101 /* Offset|ADC1K|VBVolt| */
102 MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */
103 MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */
104 MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */
105 MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */
106};
107
108/* Define charger cable type */
109enum max77843_muic_charger_type {
110 MAX77843_MUIC_CHG_NONE = 0,
111 MAX77843_MUIC_CHG_USB,
112 MAX77843_MUIC_CHG_DOWNSTREAM,
113 MAX77843_MUIC_CHG_DEDICATED,
114 MAX77843_MUIC_CHG_SPECIAL_500MA,
115 MAX77843_MUIC_CHG_SPECIAL_1A,
116 MAX77843_MUIC_CHG_SPECIAL_BIAS,
117 MAX77843_MUIC_CHG_RESERVED,
118 MAX77843_MUIC_CHG_GND,
119};
120
121enum {
122 MAX77843_CABLE_USB = 0,
123 MAX77843_CABLE_USB_HOST,
124 MAX77843_CABLE_TA,
125 MAX77843_CABLE_CHARGE_DOWNSTREAM,
126 MAX77843_CABLE_FAST_CHARGER,
127 MAX77843_CABLE_SLOW_CHARGER,
128 MAX77843_CABLE_MHL,
129 MAX77843_CABLE_MHL_TA,
130 MAX77843_CABLE_JIG_USB_ON,
131 MAX77843_CABLE_JIG_USB_OFF,
132 MAX77843_CABLE_JIG_UART_ON,
133 MAX77843_CABLE_JIG_UART_OFF,
134
135 MAX77843_CABLE_NUM,
136};
137
138static const char *max77843_extcon_cable[] = {
139 [MAX77843_CABLE_USB] = "USB",
140 [MAX77843_CABLE_USB_HOST] = "USB-HOST",
141 [MAX77843_CABLE_TA] = "TA",
142 [MAX77843_CABLE_CHARGE_DOWNSTREAM] = "CHARGER-DOWNSTREAM",
143 [MAX77843_CABLE_FAST_CHARGER] = "FAST-CHARGER",
144 [MAX77843_CABLE_SLOW_CHARGER] = "SLOW-CHARGER",
145 [MAX77843_CABLE_MHL] = "MHL",
146 [MAX77843_CABLE_MHL_TA] = "MHL-TA",
147 [MAX77843_CABLE_JIG_USB_ON] = "JIG-USB-ON",
148 [MAX77843_CABLE_JIG_USB_OFF] = "JIG-USB-OFF",
149 [MAX77843_CABLE_JIG_UART_ON] = "JIG-UART-ON",
150 [MAX77843_CABLE_JIG_UART_OFF] = "JIG-UART-OFF",
151};
152
153struct max77843_muic_irq {
154 unsigned int irq;
155 const char *name;
156 unsigned int virq;
157};
158
159static struct max77843_muic_irq max77843_muic_irqs[] = {
160 { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" },
161 { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" },
162 { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" },
163 { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" },
164 { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" },
165 { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" },
166 { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" },
167 { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" },
168 { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" },
169 { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" },
170 { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" },
171 { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"},
172 { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"},
173 { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"},
174 { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"},
175 { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"},
176};
177
178static const struct regmap_config max77843_muic_regmap_config = {
179 .reg_bits = 8,
180 .val_bits = 8,
181 .max_register = MAX77843_MUIC_REG_END,
182};
183
184static const struct regmap_irq max77843_muic_irq[] = {
185 /* INT1 interrupt */
186 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, },
187 { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, },
188 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, },
189
190 /* INT2 interrupt */
191 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, },
192 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, },
193 { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, },
194 { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, },
195 { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, },
196
197 /* INT3 interrupt */
198 { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, },
199 { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, },
200 { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, },
201 { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, },
202 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, },
203 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, },
204 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, },
205 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, },
206};
207
208static const struct regmap_irq_chip max77843_muic_irq_chip = {
209 .name = "max77843-muic",
210 .status_base = MAX77843_MUIC_REG_INT1,
211 .mask_base = MAX77843_MUIC_REG_INTMASK1,
212 .mask_invert = true,
213 .num_regs = 3,
214 .irqs = max77843_muic_irq,
215 .num_irqs = ARRAY_SIZE(max77843_muic_irq),
216};
217
218static int max77843_muic_set_path(struct max77843_muic_info *info,
219 u8 val, bool attached)
220{
221 struct max77843 *max77843 = info->max77843;
222 int ret = 0;
223 unsigned int ctrl1, ctrl2;
224
225 if (attached)
226 ctrl1 = val;
227 else
228 ctrl1 = CONTROL1_SW_OPEN;
229
230 ret = regmap_update_bits(max77843->regmap_muic,
231 MAX77843_MUIC_REG_CONTROL1,
232 CONTROL1_COM_SW, ctrl1);
233 if (ret < 0) {
234 dev_err(info->dev, "Cannot switch MUIC port\n");
235 return ret;
236 }
237
238 if (attached)
239 ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK;
240 else
241 ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK;
242
243 ret = regmap_update_bits(max77843->regmap_muic,
244 MAX77843_MUIC_REG_CONTROL2,
245 MAX77843_MUIC_CONTROL2_LOWPWR_MASK |
246 MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2);
247 if (ret < 0) {
248 dev_err(info->dev, "Cannot update lowpower mode\n");
249 return ret;
250 }
251
252 dev_dbg(info->dev,
253 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
254 ctrl1, ctrl2, attached ? "attached" : "detached");
255
256 return 0;
257}
258
259static int max77843_muic_get_cable_type(struct max77843_muic_info *info,
260 enum max77843_muic_cable_group group, bool *attached)
261{
262 int adc, chg_type, cable_type, gnd_type;
263
264 adc = info->status[MAX77843_MUIC_STATUS1] &
265 MAX77843_MUIC_STATUS1_ADC_MASK;
266 adc >>= STATUS1_ADC_SHIFT;
267
268 switch (group) {
269 case MAX77843_CABLE_GROUP_ADC:
270 if (adc == MAX77843_MUIC_ADC_OPEN) {
271 *attached = false;
272 cable_type = info->prev_cable_type;
273 info->prev_cable_type = MAX77843_MUIC_ADC_OPEN;
274 } else {
275 *attached = true;
276 cable_type = info->prev_cable_type = adc;
277 }
278 break;
279 case MAX77843_CABLE_GROUP_CHG:
280 chg_type = info->status[MAX77843_MUIC_STATUS2] &
281 MAX77843_MUIC_STATUS2_CHGTYP_MASK;
282
283 /* Check GROUND accessory with charger cable */
284 if (adc == MAX77843_MUIC_ADC_GROUND) {
285 if (chg_type == MAX77843_MUIC_CHG_NONE) {
286 /* The following state when charger cable is
287 * disconnected but the GROUND accessory still
288 * connected */
289 *attached = false;
290 cable_type = info->prev_chg_type;
291 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
292 } else {
293
294 /* The following state when charger cable is
295 * connected on the GROUND accessory */
296 *attached = true;
297 cable_type = MAX77843_MUIC_CHG_GND;
298 info->prev_chg_type = MAX77843_MUIC_CHG_GND;
299 }
300 break;
301 }
302
303 if (chg_type == MAX77843_MUIC_CHG_NONE) {
304 *attached = false;
305 cable_type = info->prev_chg_type;
306 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
307 } else {
308 *attached = true;
309 cable_type = info->prev_chg_type = chg_type;
310 }
311 break;
312 case MAX77843_CABLE_GROUP_ADC_GND:
313 if (adc == MAX77843_MUIC_ADC_OPEN) {
314 *attached = false;
315 cable_type = info->prev_gnd_type;
316 info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN;
317 } else {
318 *attached = true;
319
320 /* Offset|ADC1K|VBVolt|
321 * 0x1| 0| 0| USB-HOST
322 * 0x1| 0| 1| USB-HOST with VB
323 * 0x1| 1| 0| MHL
324 * 0x1| 1| 1| MHL with VB */
325 /* Get ADC1K register bit */
326 gnd_type = (info->status[MAX77843_MUIC_STATUS1] &
327 MAX77843_MUIC_STATUS1_ADC1K_MASK);
328
329 /* Get VBVolt register bit */
330 gnd_type |= (info->status[MAX77843_MUIC_STATUS2] &
331 MAX77843_MUIC_STATUS2_VBVOLT_MASK);
332 gnd_type >>= STATUS2_VBVOLT_SHIFT;
333
334 /* Offset of GND cable */
335 gnd_type |= MAX77843_MUIC_GND_USB_HOST;
336 cable_type = info->prev_gnd_type = gnd_type;
337 }
338 break;
339 default:
340 dev_err(info->dev, "Unknown cable group (%d)\n", group);
341 cable_type = -EINVAL;
342 break;
343 }
344
345 return cable_type;
346}
347
348static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info)
349{
350 int ret, gnd_cable_type;
351 bool attached;
352
353 gnd_cable_type = max77843_muic_get_cable_type(info,
354 MAX77843_CABLE_GROUP_ADC_GND, &attached);
355 dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n",
356 attached ? "attached" : "detached", gnd_cable_type);
357
358 switch (gnd_cable_type) {
359 case MAX77843_MUIC_GND_USB_HOST:
360 case MAX77843_MUIC_GND_USB_HOST_VB:
361 ret = max77843_muic_set_path(info, CONTROL1_SW_USB, attached);
362 if (ret < 0)
363 return ret;
364
365 extcon_set_cable_state(info->edev, "USB-HOST", attached);
366 break;
367 case MAX77843_MUIC_GND_MHL_VB:
368 case MAX77843_MUIC_GND_MHL:
369 ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached);
370 if (ret < 0)
371 return ret;
372
373 extcon_set_cable_state(info->edev, "MHL", attached);
374 break;
375 default:
376 dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n",
377 attached ? "attached" : "detached", gnd_cable_type);
378 return -EINVAL;
379 }
380
381 return 0;
382}
383
384static int max77843_muic_jig_handler(struct max77843_muic_info *info,
385 int cable_type, bool attached)
386{
387 int ret;
388
389 dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n",
390 attached ? "attached" : "detached", cable_type);
391
392 switch (cable_type) {
393 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
394 ret = max77843_muic_set_path(info, CONTROL1_SW_USB, attached);
395 if (ret < 0)
396 return ret;
397 extcon_set_cable_state(info->edev, "JIG-USB-OFF", attached);
398 break;
399 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
400 ret = max77843_muic_set_path(info, CONTROL1_SW_USB, attached);
401 if (ret < 0)
402 return ret;
403 extcon_set_cable_state(info->edev, "JIG-USB-ON", attached);
404 break;
405 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
406 ret = max77843_muic_set_path(info, CONTROL1_SW_UART, attached);
407 if (ret < 0)
408 return ret;
409 extcon_set_cable_state(info->edev, "JIG-UART-OFF", attached);
410 break;
411 default:
412 ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached);
413 if (ret < 0)
414 return ret;
415 break;
416 }
417
418 return 0;
419}
420
421static int max77843_muic_adc_handler(struct max77843_muic_info *info)
422{
423 int ret, cable_type;
424 bool attached;
425
426 cable_type = max77843_muic_get_cable_type(info,
427 MAX77843_CABLE_GROUP_ADC, &attached);
428
429 dev_dbg(info->dev,
430 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
431 attached ? "attached" : "detached", cable_type,
432 info->prev_cable_type);
433
434 switch (cable_type) {
435 case MAX77843_MUIC_ADC_GROUND:
436 ret = max77843_muic_adc_gnd_handler(info);
437 if (ret < 0)
438 return ret;
439 break;
440 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
441 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
442 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
443 ret = max77843_muic_jig_handler(info, cable_type, attached);
444 if (ret < 0)
445 return ret;
446 break;
447 case MAX77843_MUIC_ADC_SEND_END_BUTTON:
448 case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON:
449 case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON:
450 case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON:
451 case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON:
452 case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON:
453 case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON:
454 case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON:
455 case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON:
456 case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON:
457 case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON:
458 case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON:
459 case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON:
460 case MAX77843_MUIC_ADC_RESERVED_ACC_1:
461 case MAX77843_MUIC_ADC_RESERVED_ACC_2:
462 case MAX77843_MUIC_ADC_RESERVED_ACC_3:
463 case MAX77843_MUIC_ADC_RESERVED_ACC_4:
464 case MAX77843_MUIC_ADC_RESERVED_ACC_5:
465 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2:
466 case MAX77843_MUIC_ADC_PHONE_POWERED_DEV:
467 case MAX77843_MUIC_ADC_TTY_CONVERTER:
468 case MAX77843_MUIC_ADC_UART_CABLE:
469 case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG:
470 case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD:
471 case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG:
472 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON:
473 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1:
474 case MAX77843_MUIC_ADC_OPEN:
475 dev_err(info->dev,
476 "accessory is %s but it isn't used (adc:0x%x)\n",
477 attached ? "attached" : "detached", cable_type);
478 return -EAGAIN;
479 default:
480 dev_err(info->dev,
481 "failed to detect %s accessory (adc:0x%x)\n",
482 attached ? "attached" : "detached", cable_type);
483 return -EINVAL;
484 }
485
486 return 0;
487}
488
489static int max77843_muic_chg_handler(struct max77843_muic_info *info)
490{
491 int ret, chg_type, gnd_type;
492 bool attached;
493
494 chg_type = max77843_muic_get_cable_type(info,
495 MAX77843_CABLE_GROUP_CHG, &attached);
496
497 dev_dbg(info->dev,
498 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
499 attached ? "attached" : "detached",
500 chg_type, info->prev_chg_type);
501
502 switch (chg_type) {
503 case MAX77843_MUIC_CHG_USB:
504 ret = max77843_muic_set_path(info, CONTROL1_SW_USB, attached);
505 if (ret < 0)
506 return ret;
507
508 extcon_set_cable_state(info->edev, "USB", attached);
509 break;
510 case MAX77843_MUIC_CHG_DOWNSTREAM:
511 ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached);
512 if (ret < 0)
513 return ret;
514
515 extcon_set_cable_state(info->edev,
516 "CHARGER-DOWNSTREAM", attached);
517 break;
518 case MAX77843_MUIC_CHG_DEDICATED:
519 ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached);
520 if (ret < 0)
521 return ret;
522
523 extcon_set_cable_state(info->edev, "TA", attached);
524 break;
525 case MAX77843_MUIC_CHG_SPECIAL_500MA:
526 ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached);
527 if (ret < 0)
528 return ret;
529
530 extcon_set_cable_state(info->edev, "SLOW-CHAREGER", attached);
531 break;
532 case MAX77843_MUIC_CHG_SPECIAL_1A:
533 ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached);
534 if (ret < 0)
535 return ret;
536
537 extcon_set_cable_state(info->edev, "FAST-CHARGER", attached);
538 break;
539 case MAX77843_MUIC_CHG_GND:
540 gnd_type = max77843_muic_get_cable_type(info,
541 MAX77843_CABLE_GROUP_ADC_GND, &attached);
542
543 /* Charger cable on MHL accessory is attach or detach */
544 if (gnd_type == MAX77843_MUIC_GND_MHL_VB)
545 extcon_set_cable_state(info->edev, "MHL-TA", true);
546 else if (gnd_type == MAX77843_MUIC_GND_MHL)
547 extcon_set_cable_state(info->edev, "MHL-TA", false);
548 break;
549 case MAX77843_MUIC_CHG_NONE:
550 break;
551 default:
552 dev_err(info->dev,
553 "failed to detect %s accessory (chg_type:0x%x)\n",
554 attached ? "attached" : "detached", chg_type);
555
556 max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached);
557 return -EINVAL;
558 }
559
560 return 0;
561}
562
563static void max77843_muic_irq_work(struct work_struct *work)
564{
565 struct max77843_muic_info *info = container_of(work,
566 struct max77843_muic_info, irq_work);
567 struct max77843 *max77843 = info->max77843;
568 int ret = 0;
569
570 mutex_lock(&info->mutex);
571
572 ret = regmap_bulk_read(max77843->regmap_muic,
573 MAX77843_MUIC_REG_STATUS1, info->status,
574 MAX77843_MUIC_STATUS_NUM);
575 if (ret) {
576 dev_err(info->dev, "Cannot read STATUS registers\n");
577 mutex_unlock(&info->mutex);
578 return;
579 }
580
581 if (info->irq_adc) {
582 ret = max77843_muic_adc_handler(info);
583 if (ret)
584 dev_err(info->dev, "Unknown cable type\n");
585 info->irq_adc = false;
586 }
587
588 if (info->irq_chg) {
589 ret = max77843_muic_chg_handler(info);
590 if (ret)
591 dev_err(info->dev, "Unknown charger type\n");
592 info->irq_chg = false;
593 }
594
595 mutex_unlock(&info->mutex);
596}
597
598static irqreturn_t max77843_muic_irq_handler(int irq, void *data)
599{
600 struct max77843_muic_info *info = data;
601 int i, irq_type = -1;
602
603 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++)
604 if (irq == max77843_muic_irqs[i].virq)
605 irq_type = max77843_muic_irqs[i].irq;
606
607 switch (irq_type) {
608 case MAX77843_MUIC_IRQ_INT1_ADC:
609 case MAX77843_MUIC_IRQ_INT1_ADCERROR:
610 case MAX77843_MUIC_IRQ_INT1_ADC1K:
611 info->irq_adc = true;
612 break;
613 case MAX77843_MUIC_IRQ_INT2_CHGTYP:
614 case MAX77843_MUIC_IRQ_INT2_CHGDETRUN:
615 case MAX77843_MUIC_IRQ_INT2_DCDTMR:
616 case MAX77843_MUIC_IRQ_INT2_DXOVP:
617 case MAX77843_MUIC_IRQ_INT2_VBVOLT:
618 info->irq_chg = true;
619 break;
620 case MAX77843_MUIC_IRQ_INT3_VBADC:
621 case MAX77843_MUIC_IRQ_INT3_VDNMON:
622 case MAX77843_MUIC_IRQ_INT3_DNRES:
623 case MAX77843_MUIC_IRQ_INT3_MPNACK:
624 case MAX77843_MUIC_IRQ_INT3_MRXBUFOW:
625 case MAX77843_MUIC_IRQ_INT3_MRXTRF:
626 case MAX77843_MUIC_IRQ_INT3_MRXPERR:
627 case MAX77843_MUIC_IRQ_INT3_MRXRDY:
628 break;
629 default:
630 dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type);
631 break;
632 }
633
634 schedule_work(&info->irq_work);
635
636 return IRQ_HANDLED;
637}
638
639static void max77843_muic_detect_cable_wq(struct work_struct *work)
640{
641 struct max77843_muic_info *info = container_of(to_delayed_work(work),
642 struct max77843_muic_info, wq_detcable);
643 struct max77843 *max77843 = info->max77843;
644 int chg_type, adc, ret;
645 bool attached;
646
647 mutex_lock(&info->mutex);
648
649 ret = regmap_bulk_read(max77843->regmap_muic,
650 MAX77843_MUIC_REG_STATUS1, info->status,
651 MAX77843_MUIC_STATUS_NUM);
652 if (ret) {
653 dev_err(info->dev, "Cannot read STATUS registers\n");
654 goto err_cable_wq;
655 }
656
657 adc = max77843_muic_get_cable_type(info,
658 MAX77843_CABLE_GROUP_ADC, &attached);
659 if (attached && adc != MAX77843_MUIC_ADC_OPEN) {
660 ret = max77843_muic_adc_handler(info);
661 if (ret < 0) {
662 dev_err(info->dev, "Cannot detect accessory\n");
663 goto err_cable_wq;
664 }
665 }
666
667 chg_type = max77843_muic_get_cable_type(info,
668 MAX77843_CABLE_GROUP_CHG, &attached);
669 if (attached && chg_type != MAX77843_MUIC_CHG_NONE) {
670 ret = max77843_muic_chg_handler(info);
671 if (ret < 0) {
672 dev_err(info->dev, "Cannot detect charger accessory\n");
673 goto err_cable_wq;
674 }
675 }
676
677err_cable_wq:
678 mutex_unlock(&info->mutex);
679}
680
681static int max77843_muic_set_debounce_time(struct max77843_muic_info *info,
682 enum max77843_muic_adc_debounce_time time)
683{
684 struct max77843 *max77843 = info->max77843;
685 int ret;
686
687 switch (time) {
688 case MAX77843_DEBOUNCE_TIME_5MS:
689 case MAX77843_DEBOUNCE_TIME_10MS:
690 case MAX77843_DEBOUNCE_TIME_25MS:
691 case MAX77843_DEBOUNCE_TIME_38_62MS:
692 ret = regmap_update_bits(max77843->regmap_muic,
693 MAX77843_MUIC_REG_CONTROL4,
694 MAX77843_MUIC_CONTROL4_ADCDBSET_MASK,
695 time << CONTROL4_ADCDBSET_SHIFT);
696 if (ret < 0) {
697 dev_err(info->dev, "Cannot write MUIC regmap\n");
698 return ret;
699 }
700 break;
701 default:
702 dev_err(info->dev, "Invalid ADC debounce time\n");
703 return -EINVAL;
704 }
705
706 return 0;
707}
708
709static int max77843_init_muic_regmap(struct max77843 *max77843)
710{
711 int ret;
712
713 max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter,
714 I2C_ADDR_MUIC);
715 if (!max77843->i2c_muic) {
716 dev_err(&max77843->i2c->dev,
717 "Cannot allocate I2C device for MUIC\n");
718 return -ENOMEM;
719 }
720
721 i2c_set_clientdata(max77843->i2c_muic, max77843);
722
723 max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic,
724 &max77843_muic_regmap_config);
725 if (IS_ERR(max77843->regmap_muic)) {
726 ret = PTR_ERR(max77843->regmap_muic);
727 goto err_muic_i2c;
728 }
729
730 ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq,
731 IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
732 0, &max77843_muic_irq_chip, &max77843->irq_data_muic);
733 if (ret < 0) {
734 dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n");
735 goto err_muic_i2c;
736 }
737
738 return 0;
739
740err_muic_i2c:
741 i2c_unregister_device(max77843->i2c_muic);
742
743 return ret;
744}
745
746static int max77843_muic_probe(struct platform_device *pdev)
747{
748 struct max77843 *max77843 = dev_get_drvdata(pdev->dev.parent);
749 struct max77843_muic_info *info;
750 unsigned int id;
751 int i, ret;
752
753 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
754 if (!info)
755 return -ENOMEM;
756
757 info->dev = &pdev->dev;
758 info->max77843 = max77843;
759
760 platform_set_drvdata(pdev, info);
761 mutex_init(&info->mutex);
762
763 /* Initialize i2c and regmap */
764 ret = max77843_init_muic_regmap(max77843);
765 if (ret) {
766 dev_err(&pdev->dev, "Failed to init MUIC regmap\n");
767 return ret;
768 }
769
770 /* Turn off auto detection configuration */
771 ret = regmap_update_bits(max77843->regmap_muic,
772 MAX77843_MUIC_REG_CONTROL4,
773 MAX77843_MUIC_CONTROL4_USBAUTO_MASK |
774 MAX77843_MUIC_CONTROL4_FCTAUTO_MASK,
775 CONTROL4_AUTO_DISABLE);
776
777 /* Initialize extcon device */
778 info->edev = devm_extcon_dev_allocate(&pdev->dev,
779 max77843_extcon_cable);
780 if (IS_ERR(info->edev)) {
781 dev_err(&pdev->dev, "Failed to allocate memory for extcon\n");
782 ret = -ENODEV;
783 goto err_muic_irq;
784 }
785
786 ret = devm_extcon_dev_register(&pdev->dev, info->edev);
787 if (ret) {
788 dev_err(&pdev->dev, "Failed to register extcon device\n");
789 goto err_muic_irq;
790 }
791
792 /* Set ADC debounce time */
793 max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS);
794
795 /* Set initial path for UART */
796 max77843_muic_set_path(info, CONTROL1_SW_UART, true);
797
798 /* Check revision number of MUIC device */
799 ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id);
800 if (ret < 0) {
801 dev_err(&pdev->dev, "Failed to read revision number\n");
802 goto err_muic_irq;
803 }
804 dev_info(info->dev, "MUIC device ID : 0x%x\n", id);
805
806 /* Support virtual irq domain for max77843 MUIC device */
807 INIT_WORK(&info->irq_work, max77843_muic_irq_work);
808
809 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) {
810 struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i];
811 unsigned int virq = 0;
812
813 virq = regmap_irq_get_virq(max77843->irq_data_muic,
814 muic_irq->irq);
815 if (virq <= 0) {
816 ret = -EINVAL;
817 goto err_muic_irq;
818 }
819 muic_irq->virq = virq;
820
821 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
822 max77843_muic_irq_handler, IRQF_NO_SUSPEND,
823 muic_irq->name, info);
824 if (ret) {
825 dev_err(&pdev->dev,
826 "Failed to request irq (IRQ: %d, error: %d)\n",
827 muic_irq->irq, ret);
828 goto err_muic_irq;
829 }
830 }
831
832 /* Detect accessory after completing the initialization of platform */
833 INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq);
834 queue_delayed_work(system_power_efficient_wq,
835 &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT));
836
837 return 0;
838
839err_muic_irq:
840 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
841 i2c_unregister_device(max77843->i2c_muic);
842
843 return ret;
844}
845
846static int max77843_muic_remove(struct platform_device *pdev)
847{
848 struct max77843_muic_info *info = platform_get_drvdata(pdev);
849 struct max77843 *max77843 = info->max77843;
850
851 cancel_work_sync(&info->irq_work);
852 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
853 i2c_unregister_device(max77843->i2c_muic);
854
855 return 0;
856}
857
858static const struct platform_device_id max77843_muic_id[] = {
859 { "max77843-muic", },
860 { /* sentinel */ },
861};
862MODULE_DEVICE_TABLE(platform, max77843_muic_id);
863
864static struct platform_driver max77843_muic_driver = {
865 .driver = {
866 .name = "max77843-muic",
867 },
868 .probe = max77843_muic_probe,
869 .remove = max77843_muic_remove,
870 .id_table = max77843_muic_id,
871};
872
873static int __init max77843_muic_init(void)
874{
875 return platform_driver_register(&max77843_muic_driver);
876}
877subsys_initcall(max77843_muic_init);
878
879MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver");
880MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
881MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-17 21:03:11 -0500