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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 | ||
121 | enum { | |
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 | ||
138 | static 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 | ||
153 | struct max77843_muic_irq { | |
154 | unsigned int irq; | |
155 | const char *name; | |
156 | unsigned int virq; | |
157 | }; | |
158 | ||
159 | static 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 | ||
178 | static 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 | ||
184 | static 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 | ||
208 | static 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 | ||
218 | static 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 | ||
259 | static 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 | ||
348 | static 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 | ||
384 | static 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 | ||
421 | static 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 | ||
489 | static 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 | ||
563 | static 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 | ||
598 | static 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 | ||
639 | static 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 | ||
677 | err_cable_wq: | |
678 | mutex_unlock(&info->mutex); | |
679 | } | |
680 | ||
681 | static 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; | |
d927c590 | 685 | int ret; |
27a28d32 JK |
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 | ||
709 | static 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"); | |
b9b518f5 | 718 | return -ENOMEM; |
27a28d32 JK |
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 | ||
740 | err_muic_i2c: | |
741 | i2c_unregister_device(max77843->i2c_muic); | |
742 | ||
743 | return ret; | |
744 | } | |
745 | ||
746 | static 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 | ||
839 | err_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 | ||
846 | static 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 | ||
858 | static const struct platform_device_id max77843_muic_id[] = { | |
859 | { "max77843-muic", }, | |
860 | { /* sentinel */ }, | |
861 | }; | |
862 | MODULE_DEVICE_TABLE(platform, max77843_muic_id); | |
863 | ||
864 | static 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 | ||
873 | static int __init max77843_muic_init(void) | |
874 | { | |
875 | return platform_driver_register(&max77843_muic_driver); | |
876 | } | |
877 | subsys_initcall(max77843_muic_init); | |
878 | ||
879 | MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver"); | |
880 | MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); | |
881 | MODULE_LICENSE("GPL"); |