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27a28d32 JK |
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 | ||
25 | enum max77843_muic_status { | |
26 | MAX77843_MUIC_STATUS1 = 0, | |
27 | MAX77843_MUIC_STATUS2, | |
28 | MAX77843_MUIC_STATUS3, | |
29 | ||
30 | MAX77843_MUIC_STATUS_NUM, | |
31 | }; | |
32 | ||
33 | struct 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 | ||
51 | enum max77843_muic_cable_group { | |
52 | MAX77843_CABLE_GROUP_ADC = 0, | |
53 | MAX77843_CABLE_GROUP_ADC_GND, | |
54 | MAX77843_CABLE_GROUP_CHG, | |
55 | }; | |
56 | ||
57 | enum 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 */ | |
65 | enum 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 */ | |
109 | enum 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 | ||
2a9de9c0 CC |
121 | static const enum extcon max77843_extcon_cable[] = { |
122 | EXTCON_USB, | |
123 | EXTCON_USB_HOST, | |
124 | EXTCON_TA, | |
125 | EXTCON_CHARGE_DOWNSTREAM, | |
126 | EXTCON_FAST_CHARGER, | |
127 | EXTCON_SLOW_CHARGER, | |
128 | EXTCON_MHL, | |
129 | EXTCON_JIG, | |
130 | EXTCON_NONE, | |
27a28d32 JK |
131 | }; |
132 | ||
133 | struct max77843_muic_irq { | |
134 | unsigned int irq; | |
135 | const char *name; | |
136 | unsigned int virq; | |
137 | }; | |
138 | ||
139 | static struct max77843_muic_irq max77843_muic_irqs[] = { | |
140 | { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" }, | |
141 | { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" }, | |
142 | { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" }, | |
143 | { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" }, | |
144 | { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" }, | |
145 | { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" }, | |
146 | { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" }, | |
147 | { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" }, | |
148 | { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" }, | |
149 | { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" }, | |
150 | { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" }, | |
151 | { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"}, | |
152 | { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"}, | |
153 | { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"}, | |
154 | { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"}, | |
155 | { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"}, | |
156 | }; | |
157 | ||
158 | static const struct regmap_config max77843_muic_regmap_config = { | |
159 | .reg_bits = 8, | |
160 | .val_bits = 8, | |
161 | .max_register = MAX77843_MUIC_REG_END, | |
162 | }; | |
163 | ||
164 | static const struct regmap_irq max77843_muic_irq[] = { | |
165 | /* INT1 interrupt */ | |
166 | { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, }, | |
167 | { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, }, | |
168 | { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, }, | |
169 | ||
170 | /* INT2 interrupt */ | |
171 | { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, }, | |
172 | { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, }, | |
173 | { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, }, | |
174 | { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, }, | |
175 | { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, }, | |
176 | ||
177 | /* INT3 interrupt */ | |
178 | { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, }, | |
179 | { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, }, | |
180 | { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, }, | |
181 | { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, }, | |
182 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, }, | |
183 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, }, | |
184 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, }, | |
185 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, }, | |
186 | }; | |
187 | ||
188 | static const struct regmap_irq_chip max77843_muic_irq_chip = { | |
189 | .name = "max77843-muic", | |
190 | .status_base = MAX77843_MUIC_REG_INT1, | |
191 | .mask_base = MAX77843_MUIC_REG_INTMASK1, | |
192 | .mask_invert = true, | |
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) | |
200 | { | |
201 | struct max77843 *max77843 = info->max77843; | |
202 | int ret = 0; | |
203 | unsigned int ctrl1, ctrl2; | |
204 | ||
205 | if (attached) | |
206 | ctrl1 = val; | |
207 | else | |
208 | ctrl1 = CONTROL1_SW_OPEN; | |
209 | ||
210 | ret = regmap_update_bits(max77843->regmap_muic, | |
211 | MAX77843_MUIC_REG_CONTROL1, | |
212 | CONTROL1_COM_SW, ctrl1); | |
213 | if (ret < 0) { | |
214 | dev_err(info->dev, "Cannot switch MUIC port\n"); | |
215 | return ret; | |
216 | } | |
217 | ||
218 | if (attached) | |
219 | ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK; | |
220 | else | |
221 | ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK; | |
222 | ||
223 | ret = regmap_update_bits(max77843->regmap_muic, | |
224 | MAX77843_MUIC_REG_CONTROL2, | |
225 | MAX77843_MUIC_CONTROL2_LOWPWR_MASK | | |
226 | MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2); | |
227 | if (ret < 0) { | |
228 | dev_err(info->dev, "Cannot update lowpower mode\n"); | |
229 | return ret; | |
230 | } | |
231 | ||
232 | dev_dbg(info->dev, | |
233 | "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", | |
234 | ctrl1, ctrl2, attached ? "attached" : "detached"); | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | static int max77843_muic_get_cable_type(struct max77843_muic_info *info, | |
240 | enum max77843_muic_cable_group group, bool *attached) | |
241 | { | |
242 | int adc, chg_type, cable_type, gnd_type; | |
243 | ||
244 | adc = info->status[MAX77843_MUIC_STATUS1] & | |
245 | MAX77843_MUIC_STATUS1_ADC_MASK; | |
246 | adc >>= STATUS1_ADC_SHIFT; | |
247 | ||
248 | switch (group) { | |
249 | case MAX77843_CABLE_GROUP_ADC: | |
250 | if (adc == MAX77843_MUIC_ADC_OPEN) { | |
251 | *attached = false; | |
252 | cable_type = info->prev_cable_type; | |
253 | info->prev_cable_type = MAX77843_MUIC_ADC_OPEN; | |
254 | } else { | |
255 | *attached = true; | |
256 | cable_type = info->prev_cable_type = adc; | |
257 | } | |
258 | break; | |
259 | case MAX77843_CABLE_GROUP_CHG: | |
260 | chg_type = info->status[MAX77843_MUIC_STATUS2] & | |
261 | MAX77843_MUIC_STATUS2_CHGTYP_MASK; | |
262 | ||
263 | /* Check GROUND accessory with charger cable */ | |
264 | if (adc == MAX77843_MUIC_ADC_GROUND) { | |
265 | if (chg_type == MAX77843_MUIC_CHG_NONE) { | |
266 | /* The following state when charger cable is | |
267 | * disconnected but the GROUND accessory still | |
268 | * connected */ | |
269 | *attached = false; | |
270 | cable_type = info->prev_chg_type; | |
271 | info->prev_chg_type = MAX77843_MUIC_CHG_NONE; | |
272 | } else { | |
273 | ||
274 | /* The following state when charger cable is | |
275 | * connected on the GROUND accessory */ | |
276 | *attached = true; | |
277 | cable_type = MAX77843_MUIC_CHG_GND; | |
278 | info->prev_chg_type = MAX77843_MUIC_CHG_GND; | |
279 | } | |
280 | break; | |
281 | } | |
282 | ||
283 | if (chg_type == MAX77843_MUIC_CHG_NONE) { | |
284 | *attached = false; | |
285 | cable_type = info->prev_chg_type; | |
286 | info->prev_chg_type = MAX77843_MUIC_CHG_NONE; | |
287 | } else { | |
288 | *attached = true; | |
289 | cable_type = info->prev_chg_type = chg_type; | |
290 | } | |
291 | break; | |
292 | case MAX77843_CABLE_GROUP_ADC_GND: | |
293 | if (adc == MAX77843_MUIC_ADC_OPEN) { | |
294 | *attached = false; | |
295 | cable_type = info->prev_gnd_type; | |
296 | info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN; | |
297 | } else { | |
298 | *attached = true; | |
299 | ||
300 | /* Offset|ADC1K|VBVolt| | |
301 | * 0x1| 0| 0| USB-HOST | |
302 | * 0x1| 0| 1| USB-HOST with VB | |
303 | * 0x1| 1| 0| MHL | |
304 | * 0x1| 1| 1| MHL with VB */ | |
305 | /* Get ADC1K register bit */ | |
306 | gnd_type = (info->status[MAX77843_MUIC_STATUS1] & | |
307 | MAX77843_MUIC_STATUS1_ADC1K_MASK); | |
308 | ||
309 | /* Get VBVolt register bit */ | |
310 | gnd_type |= (info->status[MAX77843_MUIC_STATUS2] & | |
311 | MAX77843_MUIC_STATUS2_VBVOLT_MASK); | |
312 | gnd_type >>= STATUS2_VBVOLT_SHIFT; | |
313 | ||
314 | /* Offset of GND cable */ | |
315 | gnd_type |= MAX77843_MUIC_GND_USB_HOST; | |
316 | cable_type = info->prev_gnd_type = gnd_type; | |
317 | } | |
318 | break; | |
319 | default: | |
320 | dev_err(info->dev, "Unknown cable group (%d)\n", group); | |
321 | cable_type = -EINVAL; | |
322 | break; | |
323 | } | |
324 | ||
325 | return cable_type; | |
326 | } | |
327 | ||
328 | static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info) | |
329 | { | |
330 | int ret, gnd_cable_type; | |
331 | bool attached; | |
332 | ||
333 | gnd_cable_type = max77843_muic_get_cable_type(info, | |
334 | MAX77843_CABLE_GROUP_ADC_GND, &attached); | |
335 | dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n", | |
336 | attached ? "attached" : "detached", gnd_cable_type); | |
337 | ||
338 | switch (gnd_cable_type) { | |
339 | case MAX77843_MUIC_GND_USB_HOST: | |
340 | case MAX77843_MUIC_GND_USB_HOST_VB: | |
341 | ret = max77843_muic_set_path(info, CONTROL1_SW_USB, attached); | |
342 | if (ret < 0) | |
343 | return ret; | |
344 | ||
2a9de9c0 | 345 | extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, attached); |
27a28d32 JK |
346 | break; |
347 | case MAX77843_MUIC_GND_MHL_VB: | |
348 | case MAX77843_MUIC_GND_MHL: | |
349 | ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached); | |
350 | if (ret < 0) | |
351 | return ret; | |
352 | ||
2a9de9c0 | 353 | extcon_set_cable_state_(info->edev, EXTCON_MHL, attached); |
27a28d32 JK |
354 | break; |
355 | default: | |
356 | dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n", | |
357 | attached ? "attached" : "detached", gnd_cable_type); | |
358 | return -EINVAL; | |
359 | } | |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
364 | static int max77843_muic_jig_handler(struct max77843_muic_info *info, | |
365 | int cable_type, bool attached) | |
366 | { | |
367 | int ret; | |
41b3c015 | 368 | u8 path = CONTROL1_SW_OPEN; |
27a28d32 JK |
369 | |
370 | dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n", | |
371 | attached ? "attached" : "detached", cable_type); | |
372 | ||
373 | switch (cable_type) { | |
374 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
27a28d32 | 375 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: |
41b3c015 | 376 | path = CONTROL1_SW_USB; |
27a28d32 JK |
377 | break; |
378 | case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
41b3c015 | 379 | path = CONTROL1_SW_UART; |
27a28d32 JK |
380 | break; |
381 | default: | |
41b3c015 | 382 | return -EINVAL; |
27a28d32 JK |
383 | } |
384 | ||
41b3c015 CC |
385 | ret = max77843_muic_set_path(info, path, attached); |
386 | if (ret < 0) | |
387 | return ret; | |
388 | ||
2a9de9c0 | 389 | extcon_set_cable_state_(info->edev, EXTCON_JIG, attached); |
41b3c015 | 390 | |
27a28d32 JK |
391 | return 0; |
392 | } | |
393 | ||
394 | static int max77843_muic_adc_handler(struct max77843_muic_info *info) | |
395 | { | |
396 | int ret, cable_type; | |
397 | bool attached; | |
398 | ||
399 | cable_type = max77843_muic_get_cable_type(info, | |
400 | MAX77843_CABLE_GROUP_ADC, &attached); | |
401 | ||
402 | dev_dbg(info->dev, | |
403 | "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", | |
404 | attached ? "attached" : "detached", cable_type, | |
405 | info->prev_cable_type); | |
406 | ||
407 | switch (cable_type) { | |
408 | case MAX77843_MUIC_ADC_GROUND: | |
409 | ret = max77843_muic_adc_gnd_handler(info); | |
410 | if (ret < 0) | |
411 | return ret; | |
412 | break; | |
413 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
414 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: | |
415 | case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
416 | ret = max77843_muic_jig_handler(info, cable_type, attached); | |
417 | if (ret < 0) | |
418 | return ret; | |
419 | break; | |
420 | case MAX77843_MUIC_ADC_SEND_END_BUTTON: | |
421 | case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON: | |
422 | case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON: | |
423 | case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON: | |
424 | case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON: | |
425 | case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON: | |
426 | case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON: | |
427 | case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON: | |
428 | case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON: | |
429 | case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON: | |
430 | case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON: | |
431 | case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON: | |
432 | case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON: | |
433 | case MAX77843_MUIC_ADC_RESERVED_ACC_1: | |
434 | case MAX77843_MUIC_ADC_RESERVED_ACC_2: | |
435 | case MAX77843_MUIC_ADC_RESERVED_ACC_3: | |
436 | case MAX77843_MUIC_ADC_RESERVED_ACC_4: | |
437 | case MAX77843_MUIC_ADC_RESERVED_ACC_5: | |
438 | case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2: | |
439 | case MAX77843_MUIC_ADC_PHONE_POWERED_DEV: | |
440 | case MAX77843_MUIC_ADC_TTY_CONVERTER: | |
441 | case MAX77843_MUIC_ADC_UART_CABLE: | |
442 | case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG: | |
443 | case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD: | |
444 | case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG: | |
445 | case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON: | |
446 | case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1: | |
447 | case MAX77843_MUIC_ADC_OPEN: | |
448 | dev_err(info->dev, | |
449 | "accessory is %s but it isn't used (adc:0x%x)\n", | |
450 | attached ? "attached" : "detached", cable_type); | |
451 | return -EAGAIN; | |
452 | default: | |
453 | dev_err(info->dev, | |
454 | "failed to detect %s accessory (adc:0x%x)\n", | |
455 | attached ? "attached" : "detached", cable_type); | |
456 | return -EINVAL; | |
457 | } | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
462 | static int max77843_muic_chg_handler(struct max77843_muic_info *info) | |
463 | { | |
464 | int ret, chg_type, gnd_type; | |
465 | bool attached; | |
466 | ||
467 | chg_type = max77843_muic_get_cable_type(info, | |
468 | MAX77843_CABLE_GROUP_CHG, &attached); | |
469 | ||
470 | dev_dbg(info->dev, | |
471 | "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", | |
472 | attached ? "attached" : "detached", | |
473 | chg_type, info->prev_chg_type); | |
474 | ||
475 | switch (chg_type) { | |
476 | case MAX77843_MUIC_CHG_USB: | |
477 | ret = max77843_muic_set_path(info, CONTROL1_SW_USB, attached); | |
478 | if (ret < 0) | |
479 | return ret; | |
480 | ||
2a9de9c0 | 481 | extcon_set_cable_state_(info->edev, EXTCON_USB, attached); |
27a28d32 JK |
482 | break; |
483 | case MAX77843_MUIC_CHG_DOWNSTREAM: | |
484 | ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached); | |
485 | if (ret < 0) | |
486 | return ret; | |
487 | ||
2a9de9c0 CC |
488 | extcon_set_cable_state_(info->edev, EXTCON_CHARGE_DOWNSTREAM, |
489 | attached); | |
27a28d32 JK |
490 | break; |
491 | case MAX77843_MUIC_CHG_DEDICATED: | |
492 | ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached); | |
493 | if (ret < 0) | |
494 | return ret; | |
495 | ||
2a9de9c0 | 496 | extcon_set_cable_state_(info->edev, EXTCON_TA, attached); |
27a28d32 JK |
497 | break; |
498 | case MAX77843_MUIC_CHG_SPECIAL_500MA: | |
499 | ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached); | |
500 | if (ret < 0) | |
501 | return ret; | |
502 | ||
2a9de9c0 CC |
503 | extcon_set_cable_state_(info->edev, EXTCON_SLOW_CHARGER, |
504 | attached); | |
27a28d32 JK |
505 | break; |
506 | case MAX77843_MUIC_CHG_SPECIAL_1A: | |
507 | ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached); | |
508 | if (ret < 0) | |
509 | return ret; | |
510 | ||
2a9de9c0 CC |
511 | extcon_set_cable_state_(info->edev, EXTCON_FAST_CHARGER, |
512 | attached); | |
27a28d32 JK |
513 | break; |
514 | case MAX77843_MUIC_CHG_GND: | |
515 | gnd_type = max77843_muic_get_cable_type(info, | |
516 | MAX77843_CABLE_GROUP_ADC_GND, &attached); | |
517 | ||
518 | /* Charger cable on MHL accessory is attach or detach */ | |
519 | if (gnd_type == MAX77843_MUIC_GND_MHL_VB) | |
2a9de9c0 | 520 | extcon_set_cable_state_(info->edev, EXTCON_TA, true); |
27a28d32 | 521 | else if (gnd_type == MAX77843_MUIC_GND_MHL) |
2a9de9c0 | 522 | extcon_set_cable_state_(info->edev, EXTCON_TA, false); |
27a28d32 JK |
523 | break; |
524 | case MAX77843_MUIC_CHG_NONE: | |
525 | break; | |
526 | default: | |
527 | dev_err(info->dev, | |
528 | "failed to detect %s accessory (chg_type:0x%x)\n", | |
529 | attached ? "attached" : "detached", chg_type); | |
530 | ||
531 | max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached); | |
532 | return -EINVAL; | |
533 | } | |
534 | ||
535 | return 0; | |
536 | } | |
537 | ||
538 | static void max77843_muic_irq_work(struct work_struct *work) | |
539 | { | |
540 | struct max77843_muic_info *info = container_of(work, | |
541 | struct max77843_muic_info, irq_work); | |
542 | struct max77843 *max77843 = info->max77843; | |
543 | int ret = 0; | |
544 | ||
545 | mutex_lock(&info->mutex); | |
546 | ||
547 | ret = regmap_bulk_read(max77843->regmap_muic, | |
548 | MAX77843_MUIC_REG_STATUS1, info->status, | |
549 | MAX77843_MUIC_STATUS_NUM); | |
550 | if (ret) { | |
551 | dev_err(info->dev, "Cannot read STATUS registers\n"); | |
552 | mutex_unlock(&info->mutex); | |
553 | return; | |
554 | } | |
555 | ||
556 | if (info->irq_adc) { | |
557 | ret = max77843_muic_adc_handler(info); | |
558 | if (ret) | |
559 | dev_err(info->dev, "Unknown cable type\n"); | |
560 | info->irq_adc = false; | |
561 | } | |
562 | ||
563 | if (info->irq_chg) { | |
564 | ret = max77843_muic_chg_handler(info); | |
565 | if (ret) | |
566 | dev_err(info->dev, "Unknown charger type\n"); | |
567 | info->irq_chg = false; | |
568 | } | |
569 | ||
570 | mutex_unlock(&info->mutex); | |
571 | } | |
572 | ||
573 | static irqreturn_t max77843_muic_irq_handler(int irq, void *data) | |
574 | { | |
575 | struct max77843_muic_info *info = data; | |
576 | int i, irq_type = -1; | |
577 | ||
578 | for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) | |
579 | if (irq == max77843_muic_irqs[i].virq) | |
580 | irq_type = max77843_muic_irqs[i].irq; | |
581 | ||
582 | switch (irq_type) { | |
583 | case MAX77843_MUIC_IRQ_INT1_ADC: | |
584 | case MAX77843_MUIC_IRQ_INT1_ADCERROR: | |
585 | case MAX77843_MUIC_IRQ_INT1_ADC1K: | |
586 | info->irq_adc = true; | |
587 | break; | |
588 | case MAX77843_MUIC_IRQ_INT2_CHGTYP: | |
589 | case MAX77843_MUIC_IRQ_INT2_CHGDETRUN: | |
590 | case MAX77843_MUIC_IRQ_INT2_DCDTMR: | |
591 | case MAX77843_MUIC_IRQ_INT2_DXOVP: | |
592 | case MAX77843_MUIC_IRQ_INT2_VBVOLT: | |
593 | info->irq_chg = true; | |
594 | break; | |
595 | case MAX77843_MUIC_IRQ_INT3_VBADC: | |
596 | case MAX77843_MUIC_IRQ_INT3_VDNMON: | |
597 | case MAX77843_MUIC_IRQ_INT3_DNRES: | |
598 | case MAX77843_MUIC_IRQ_INT3_MPNACK: | |
599 | case MAX77843_MUIC_IRQ_INT3_MRXBUFOW: | |
600 | case MAX77843_MUIC_IRQ_INT3_MRXTRF: | |
601 | case MAX77843_MUIC_IRQ_INT3_MRXPERR: | |
602 | case MAX77843_MUIC_IRQ_INT3_MRXRDY: | |
603 | break; | |
604 | default: | |
605 | dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type); | |
606 | break; | |
607 | } | |
608 | ||
609 | schedule_work(&info->irq_work); | |
610 | ||
611 | return IRQ_HANDLED; | |
612 | } | |
613 | ||
614 | static void max77843_muic_detect_cable_wq(struct work_struct *work) | |
615 | { | |
616 | struct max77843_muic_info *info = container_of(to_delayed_work(work), | |
617 | struct max77843_muic_info, wq_detcable); | |
618 | struct max77843 *max77843 = info->max77843; | |
619 | int chg_type, adc, ret; | |
620 | bool attached; | |
621 | ||
622 | mutex_lock(&info->mutex); | |
623 | ||
624 | ret = regmap_bulk_read(max77843->regmap_muic, | |
625 | MAX77843_MUIC_REG_STATUS1, info->status, | |
626 | MAX77843_MUIC_STATUS_NUM); | |
627 | if (ret) { | |
628 | dev_err(info->dev, "Cannot read STATUS registers\n"); | |
629 | goto err_cable_wq; | |
630 | } | |
631 | ||
632 | adc = max77843_muic_get_cable_type(info, | |
633 | MAX77843_CABLE_GROUP_ADC, &attached); | |
634 | if (attached && adc != MAX77843_MUIC_ADC_OPEN) { | |
635 | ret = max77843_muic_adc_handler(info); | |
636 | if (ret < 0) { | |
637 | dev_err(info->dev, "Cannot detect accessory\n"); | |
638 | goto err_cable_wq; | |
639 | } | |
640 | } | |
641 | ||
642 | chg_type = max77843_muic_get_cable_type(info, | |
643 | MAX77843_CABLE_GROUP_CHG, &attached); | |
644 | if (attached && chg_type != MAX77843_MUIC_CHG_NONE) { | |
645 | ret = max77843_muic_chg_handler(info); | |
646 | if (ret < 0) { | |
647 | dev_err(info->dev, "Cannot detect charger accessory\n"); | |
648 | goto err_cable_wq; | |
649 | } | |
650 | } | |
651 | ||
652 | err_cable_wq: | |
653 | mutex_unlock(&info->mutex); | |
654 | } | |
655 | ||
656 | static int max77843_muic_set_debounce_time(struct max77843_muic_info *info, | |
657 | enum max77843_muic_adc_debounce_time time) | |
658 | { | |
659 | struct max77843 *max77843 = info->max77843; | |
d927c590 | 660 | int ret; |
27a28d32 JK |
661 | |
662 | switch (time) { | |
663 | case MAX77843_DEBOUNCE_TIME_5MS: | |
664 | case MAX77843_DEBOUNCE_TIME_10MS: | |
665 | case MAX77843_DEBOUNCE_TIME_25MS: | |
666 | case MAX77843_DEBOUNCE_TIME_38_62MS: | |
667 | ret = regmap_update_bits(max77843->regmap_muic, | |
668 | MAX77843_MUIC_REG_CONTROL4, | |
669 | MAX77843_MUIC_CONTROL4_ADCDBSET_MASK, | |
670 | time << CONTROL4_ADCDBSET_SHIFT); | |
671 | if (ret < 0) { | |
672 | dev_err(info->dev, "Cannot write MUIC regmap\n"); | |
673 | return ret; | |
674 | } | |
675 | break; | |
676 | default: | |
677 | dev_err(info->dev, "Invalid ADC debounce time\n"); | |
678 | return -EINVAL; | |
679 | } | |
680 | ||
681 | return 0; | |
682 | } | |
683 | ||
684 | static int max77843_init_muic_regmap(struct max77843 *max77843) | |
685 | { | |
686 | int ret; | |
687 | ||
688 | max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter, | |
689 | I2C_ADDR_MUIC); | |
690 | if (!max77843->i2c_muic) { | |
691 | dev_err(&max77843->i2c->dev, | |
692 | "Cannot allocate I2C device for MUIC\n"); | |
b9b518f5 | 693 | return -ENOMEM; |
27a28d32 JK |
694 | } |
695 | ||
696 | i2c_set_clientdata(max77843->i2c_muic, max77843); | |
697 | ||
698 | max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic, | |
699 | &max77843_muic_regmap_config); | |
700 | if (IS_ERR(max77843->regmap_muic)) { | |
701 | ret = PTR_ERR(max77843->regmap_muic); | |
702 | goto err_muic_i2c; | |
703 | } | |
704 | ||
705 | ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq, | |
706 | IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, | |
707 | 0, &max77843_muic_irq_chip, &max77843->irq_data_muic); | |
708 | if (ret < 0) { | |
709 | dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n"); | |
710 | goto err_muic_i2c; | |
711 | } | |
712 | ||
713 | return 0; | |
714 | ||
715 | err_muic_i2c: | |
716 | i2c_unregister_device(max77843->i2c_muic); | |
717 | ||
718 | return ret; | |
719 | } | |
720 | ||
721 | static int max77843_muic_probe(struct platform_device *pdev) | |
722 | { | |
723 | struct max77843 *max77843 = dev_get_drvdata(pdev->dev.parent); | |
724 | struct max77843_muic_info *info; | |
725 | unsigned int id; | |
726 | int i, ret; | |
727 | ||
728 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
729 | if (!info) | |
730 | return -ENOMEM; | |
731 | ||
732 | info->dev = &pdev->dev; | |
733 | info->max77843 = max77843; | |
734 | ||
735 | platform_set_drvdata(pdev, info); | |
736 | mutex_init(&info->mutex); | |
737 | ||
738 | /* Initialize i2c and regmap */ | |
739 | ret = max77843_init_muic_regmap(max77843); | |
740 | if (ret) { | |
741 | dev_err(&pdev->dev, "Failed to init MUIC regmap\n"); | |
742 | return ret; | |
743 | } | |
744 | ||
745 | /* Turn off auto detection configuration */ | |
746 | ret = regmap_update_bits(max77843->regmap_muic, | |
747 | MAX77843_MUIC_REG_CONTROL4, | |
748 | MAX77843_MUIC_CONTROL4_USBAUTO_MASK | | |
749 | MAX77843_MUIC_CONTROL4_FCTAUTO_MASK, | |
750 | CONTROL4_AUTO_DISABLE); | |
751 | ||
752 | /* Initialize extcon device */ | |
753 | info->edev = devm_extcon_dev_allocate(&pdev->dev, | |
754 | max77843_extcon_cable); | |
755 | if (IS_ERR(info->edev)) { | |
756 | dev_err(&pdev->dev, "Failed to allocate memory for extcon\n"); | |
757 | ret = -ENODEV; | |
758 | goto err_muic_irq; | |
759 | } | |
760 | ||
761 | ret = devm_extcon_dev_register(&pdev->dev, info->edev); | |
762 | if (ret) { | |
763 | dev_err(&pdev->dev, "Failed to register extcon device\n"); | |
764 | goto err_muic_irq; | |
765 | } | |
766 | ||
767 | /* Set ADC debounce time */ | |
768 | max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS); | |
769 | ||
770 | /* Set initial path for UART */ | |
771 | max77843_muic_set_path(info, CONTROL1_SW_UART, true); | |
772 | ||
773 | /* Check revision number of MUIC device */ | |
774 | ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id); | |
775 | if (ret < 0) { | |
776 | dev_err(&pdev->dev, "Failed to read revision number\n"); | |
777 | goto err_muic_irq; | |
778 | } | |
779 | dev_info(info->dev, "MUIC device ID : 0x%x\n", id); | |
780 | ||
781 | /* Support virtual irq domain for max77843 MUIC device */ | |
782 | INIT_WORK(&info->irq_work, max77843_muic_irq_work); | |
783 | ||
784 | for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) { | |
785 | struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i]; | |
786 | unsigned int virq = 0; | |
787 | ||
788 | virq = regmap_irq_get_virq(max77843->irq_data_muic, | |
789 | muic_irq->irq); | |
790 | if (virq <= 0) { | |
791 | ret = -EINVAL; | |
792 | goto err_muic_irq; | |
793 | } | |
794 | muic_irq->virq = virq; | |
795 | ||
796 | ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, | |
797 | max77843_muic_irq_handler, IRQF_NO_SUSPEND, | |
798 | muic_irq->name, info); | |
799 | if (ret) { | |
800 | dev_err(&pdev->dev, | |
801 | "Failed to request irq (IRQ: %d, error: %d)\n", | |
802 | muic_irq->irq, ret); | |
803 | goto err_muic_irq; | |
804 | } | |
805 | } | |
806 | ||
807 | /* Detect accessory after completing the initialization of platform */ | |
808 | INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq); | |
809 | queue_delayed_work(system_power_efficient_wq, | |
810 | &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT)); | |
811 | ||
812 | return 0; | |
813 | ||
814 | err_muic_irq: | |
815 | regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); | |
816 | i2c_unregister_device(max77843->i2c_muic); | |
817 | ||
818 | return ret; | |
819 | } | |
820 | ||
821 | static int max77843_muic_remove(struct platform_device *pdev) | |
822 | { | |
823 | struct max77843_muic_info *info = platform_get_drvdata(pdev); | |
824 | struct max77843 *max77843 = info->max77843; | |
825 | ||
826 | cancel_work_sync(&info->irq_work); | |
827 | regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); | |
828 | i2c_unregister_device(max77843->i2c_muic); | |
829 | ||
830 | return 0; | |
831 | } | |
832 | ||
833 | static const struct platform_device_id max77843_muic_id[] = { | |
834 | { "max77843-muic", }, | |
835 | { /* sentinel */ }, | |
836 | }; | |
837 | MODULE_DEVICE_TABLE(platform, max77843_muic_id); | |
838 | ||
839 | static struct platform_driver max77843_muic_driver = { | |
840 | .driver = { | |
841 | .name = "max77843-muic", | |
842 | }, | |
843 | .probe = max77843_muic_probe, | |
844 | .remove = max77843_muic_remove, | |
845 | .id_table = max77843_muic_id, | |
846 | }; | |
847 | ||
848 | static int __init max77843_muic_init(void) | |
849 | { | |
850 | return platform_driver_register(&max77843_muic_driver); | |
851 | } | |
852 | subsys_initcall(max77843_muic_init); | |
853 | ||
854 | MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver"); | |
855 | MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); | |
856 | MODULE_LICENSE("GPL"); |