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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> | |
bc1aadc1 | 18 | #include <linux/mfd/max77693-common.h> |
27a28d32 JK |
19 | #include <linux/mfd/max77843-private.h> |
20 | #include <linux/module.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/workqueue.h> | |
23 | ||
24 | #define DELAY_MS_DEFAULT 15000 /* unit: millisecond */ | |
25 | ||
26 | enum max77843_muic_status { | |
27 | MAX77843_MUIC_STATUS1 = 0, | |
28 | MAX77843_MUIC_STATUS2, | |
29 | MAX77843_MUIC_STATUS3, | |
30 | ||
31 | MAX77843_MUIC_STATUS_NUM, | |
32 | }; | |
33 | ||
34 | struct max77843_muic_info { | |
35 | struct device *dev; | |
bc1aadc1 | 36 | struct max77693_dev *max77843; |
27a28d32 JK |
37 | struct extcon_dev *edev; |
38 | ||
39 | struct mutex mutex; | |
40 | struct work_struct irq_work; | |
41 | struct delayed_work wq_detcable; | |
42 | ||
43 | u8 status[MAX77843_MUIC_STATUS_NUM]; | |
44 | int prev_cable_type; | |
45 | int prev_chg_type; | |
46 | int prev_gnd_type; | |
47 | ||
48 | bool irq_adc; | |
49 | bool irq_chg; | |
50 | }; | |
51 | ||
52 | enum max77843_muic_cable_group { | |
53 | MAX77843_CABLE_GROUP_ADC = 0, | |
54 | MAX77843_CABLE_GROUP_ADC_GND, | |
55 | MAX77843_CABLE_GROUP_CHG, | |
56 | }; | |
57 | ||
58 | enum max77843_muic_adc_debounce_time { | |
59 | MAX77843_DEBOUNCE_TIME_5MS = 0, | |
60 | MAX77843_DEBOUNCE_TIME_10MS, | |
61 | MAX77843_DEBOUNCE_TIME_25MS, | |
62 | MAX77843_DEBOUNCE_TIME_38_62MS, | |
63 | }; | |
64 | ||
65 | /* Define accessory cable type */ | |
66 | enum max77843_muic_accessory_type { | |
67 | MAX77843_MUIC_ADC_GROUND = 0, | |
68 | MAX77843_MUIC_ADC_SEND_END_BUTTON, | |
69 | MAX77843_MUIC_ADC_REMOTE_S1_BUTTON, | |
70 | MAX77843_MUIC_ADC_REMOTE_S2_BUTTON, | |
71 | MAX77843_MUIC_ADC_REMOTE_S3_BUTTON, | |
72 | MAX77843_MUIC_ADC_REMOTE_S4_BUTTON, | |
73 | MAX77843_MUIC_ADC_REMOTE_S5_BUTTON, | |
74 | MAX77843_MUIC_ADC_REMOTE_S6_BUTTON, | |
75 | MAX77843_MUIC_ADC_REMOTE_S7_BUTTON, | |
76 | MAX77843_MUIC_ADC_REMOTE_S8_BUTTON, | |
77 | MAX77843_MUIC_ADC_REMOTE_S9_BUTTON, | |
78 | MAX77843_MUIC_ADC_REMOTE_S10_BUTTON, | |
79 | MAX77843_MUIC_ADC_REMOTE_S11_BUTTON, | |
80 | MAX77843_MUIC_ADC_REMOTE_S12_BUTTON, | |
81 | MAX77843_MUIC_ADC_RESERVED_ACC_1, | |
82 | MAX77843_MUIC_ADC_RESERVED_ACC_2, | |
83 | MAX77843_MUIC_ADC_RESERVED_ACC_3, | |
84 | MAX77843_MUIC_ADC_RESERVED_ACC_4, | |
85 | MAX77843_MUIC_ADC_RESERVED_ACC_5, | |
86 | MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2, | |
87 | MAX77843_MUIC_ADC_PHONE_POWERED_DEV, | |
88 | MAX77843_MUIC_ADC_TTY_CONVERTER, | |
89 | MAX77843_MUIC_ADC_UART_CABLE, | |
90 | MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG, | |
91 | MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF, | |
92 | MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON, | |
93 | MAX77843_MUIC_ADC_AV_CABLE_NOLOAD, | |
94 | MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG, | |
95 | MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF, | |
96 | MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON, | |
97 | MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1, | |
98 | MAX77843_MUIC_ADC_OPEN, | |
99 | ||
100 | /* The blow accessories should check | |
101 | not only ADC value but also ADC1K and VBVolt value. */ | |
102 | /* Offset|ADC1K|VBVolt| */ | |
103 | MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */ | |
104 | MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */ | |
105 | MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */ | |
106 | MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */ | |
107 | }; | |
108 | ||
109 | /* Define charger cable type */ | |
110 | enum max77843_muic_charger_type { | |
111 | MAX77843_MUIC_CHG_NONE = 0, | |
112 | MAX77843_MUIC_CHG_USB, | |
113 | MAX77843_MUIC_CHG_DOWNSTREAM, | |
114 | MAX77843_MUIC_CHG_DEDICATED, | |
115 | MAX77843_MUIC_CHG_SPECIAL_500MA, | |
116 | MAX77843_MUIC_CHG_SPECIAL_1A, | |
117 | MAX77843_MUIC_CHG_SPECIAL_BIAS, | |
118 | MAX77843_MUIC_CHG_RESERVED, | |
119 | MAX77843_MUIC_CHG_GND, | |
120 | }; | |
121 | ||
73b6ecdb | 122 | static const unsigned int max77843_extcon_cable[] = { |
2a9de9c0 CC |
123 | EXTCON_USB, |
124 | EXTCON_USB_HOST, | |
8b45b6a0 | 125 | EXTCON_CHG_USB_SDP, |
11eecf91 CC |
126 | EXTCON_CHG_USB_DCP, |
127 | EXTCON_CHG_USB_CDP, | |
128 | EXTCON_CHG_USB_FAST, | |
129 | EXTCON_CHG_USB_SLOW, | |
130 | EXTCON_DISP_MHL, | |
2a9de9c0 CC |
131 | EXTCON_JIG, |
132 | EXTCON_NONE, | |
27a28d32 JK |
133 | }; |
134 | ||
135 | struct max77843_muic_irq { | |
136 | unsigned int irq; | |
137 | const char *name; | |
138 | unsigned int virq; | |
139 | }; | |
140 | ||
141 | static struct max77843_muic_irq max77843_muic_irqs[] = { | |
142 | { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" }, | |
143 | { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" }, | |
144 | { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" }, | |
145 | { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" }, | |
146 | { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" }, | |
147 | { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" }, | |
148 | { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" }, | |
149 | { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" }, | |
150 | { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" }, | |
151 | { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" }, | |
152 | { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" }, | |
153 | { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"}, | |
154 | { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"}, | |
155 | { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"}, | |
156 | { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"}, | |
157 | { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"}, | |
158 | }; | |
159 | ||
160 | static const struct regmap_config max77843_muic_regmap_config = { | |
161 | .reg_bits = 8, | |
162 | .val_bits = 8, | |
163 | .max_register = MAX77843_MUIC_REG_END, | |
164 | }; | |
165 | ||
166 | static const struct regmap_irq max77843_muic_irq[] = { | |
167 | /* INT1 interrupt */ | |
168 | { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, }, | |
169 | { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, }, | |
170 | { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, }, | |
171 | ||
172 | /* INT2 interrupt */ | |
173 | { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, }, | |
174 | { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, }, | |
175 | { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, }, | |
176 | { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, }, | |
177 | { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, }, | |
178 | ||
179 | /* INT3 interrupt */ | |
180 | { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, }, | |
181 | { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, }, | |
182 | { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, }, | |
183 | { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, }, | |
184 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, }, | |
185 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, }, | |
186 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, }, | |
187 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, }, | |
188 | }; | |
189 | ||
190 | static const struct regmap_irq_chip max77843_muic_irq_chip = { | |
191 | .name = "max77843-muic", | |
192 | .status_base = MAX77843_MUIC_REG_INT1, | |
193 | .mask_base = MAX77843_MUIC_REG_INTMASK1, | |
194 | .mask_invert = true, | |
195 | .num_regs = 3, | |
196 | .irqs = max77843_muic_irq, | |
197 | .num_irqs = ARRAY_SIZE(max77843_muic_irq), | |
198 | }; | |
199 | ||
200 | static int max77843_muic_set_path(struct max77843_muic_info *info, | |
201 | u8 val, bool attached) | |
202 | { | |
bc1aadc1 | 203 | struct max77693_dev *max77843 = info->max77843; |
27a28d32 JK |
204 | int ret = 0; |
205 | unsigned int ctrl1, ctrl2; | |
206 | ||
207 | if (attached) | |
208 | ctrl1 = val; | |
209 | else | |
309a3e00 | 210 | ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN; |
27a28d32 JK |
211 | |
212 | ret = regmap_update_bits(max77843->regmap_muic, | |
213 | MAX77843_MUIC_REG_CONTROL1, | |
309a3e00 | 214 | MAX77843_MUIC_CONTROL1_COM_SW, ctrl1); |
27a28d32 JK |
215 | if (ret < 0) { |
216 | dev_err(info->dev, "Cannot switch MUIC port\n"); | |
217 | return ret; | |
218 | } | |
219 | ||
220 | if (attached) | |
221 | ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK; | |
222 | else | |
223 | ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK; | |
224 | ||
225 | ret = regmap_update_bits(max77843->regmap_muic, | |
226 | MAX77843_MUIC_REG_CONTROL2, | |
227 | MAX77843_MUIC_CONTROL2_LOWPWR_MASK | | |
228 | MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2); | |
229 | if (ret < 0) { | |
230 | dev_err(info->dev, "Cannot update lowpower mode\n"); | |
231 | return ret; | |
232 | } | |
233 | ||
234 | dev_dbg(info->dev, | |
235 | "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", | |
236 | ctrl1, ctrl2, attached ? "attached" : "detached"); | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
241 | static int max77843_muic_get_cable_type(struct max77843_muic_info *info, | |
242 | enum max77843_muic_cable_group group, bool *attached) | |
243 | { | |
244 | int adc, chg_type, cable_type, gnd_type; | |
245 | ||
246 | adc = info->status[MAX77843_MUIC_STATUS1] & | |
247 | MAX77843_MUIC_STATUS1_ADC_MASK; | |
309a3e00 | 248 | adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT; |
27a28d32 JK |
249 | |
250 | switch (group) { | |
251 | case MAX77843_CABLE_GROUP_ADC: | |
252 | if (adc == MAX77843_MUIC_ADC_OPEN) { | |
253 | *attached = false; | |
254 | cable_type = info->prev_cable_type; | |
255 | info->prev_cable_type = MAX77843_MUIC_ADC_OPEN; | |
256 | } else { | |
257 | *attached = true; | |
258 | cable_type = info->prev_cable_type = adc; | |
259 | } | |
260 | break; | |
261 | case MAX77843_CABLE_GROUP_CHG: | |
262 | chg_type = info->status[MAX77843_MUIC_STATUS2] & | |
263 | MAX77843_MUIC_STATUS2_CHGTYP_MASK; | |
264 | ||
265 | /* Check GROUND accessory with charger cable */ | |
266 | if (adc == MAX77843_MUIC_ADC_GROUND) { | |
267 | if (chg_type == MAX77843_MUIC_CHG_NONE) { | |
268 | /* The following state when charger cable is | |
269 | * disconnected but the GROUND accessory still | |
270 | * connected */ | |
271 | *attached = false; | |
272 | cable_type = info->prev_chg_type; | |
273 | info->prev_chg_type = MAX77843_MUIC_CHG_NONE; | |
274 | } else { | |
275 | ||
276 | /* The following state when charger cable is | |
277 | * connected on the GROUND accessory */ | |
278 | *attached = true; | |
279 | cable_type = MAX77843_MUIC_CHG_GND; | |
280 | info->prev_chg_type = MAX77843_MUIC_CHG_GND; | |
281 | } | |
282 | break; | |
283 | } | |
284 | ||
285 | if (chg_type == MAX77843_MUIC_CHG_NONE) { | |
286 | *attached = false; | |
287 | cable_type = info->prev_chg_type; | |
288 | info->prev_chg_type = MAX77843_MUIC_CHG_NONE; | |
289 | } else { | |
290 | *attached = true; | |
291 | cable_type = info->prev_chg_type = chg_type; | |
292 | } | |
293 | break; | |
294 | case MAX77843_CABLE_GROUP_ADC_GND: | |
295 | if (adc == MAX77843_MUIC_ADC_OPEN) { | |
296 | *attached = false; | |
297 | cable_type = info->prev_gnd_type; | |
298 | info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN; | |
299 | } else { | |
300 | *attached = true; | |
301 | ||
302 | /* Offset|ADC1K|VBVolt| | |
303 | * 0x1| 0| 0| USB-HOST | |
304 | * 0x1| 0| 1| USB-HOST with VB | |
305 | * 0x1| 1| 0| MHL | |
306 | * 0x1| 1| 1| MHL with VB */ | |
307 | /* Get ADC1K register bit */ | |
308 | gnd_type = (info->status[MAX77843_MUIC_STATUS1] & | |
309 | MAX77843_MUIC_STATUS1_ADC1K_MASK); | |
310 | ||
311 | /* Get VBVolt register bit */ | |
312 | gnd_type |= (info->status[MAX77843_MUIC_STATUS2] & | |
313 | MAX77843_MUIC_STATUS2_VBVOLT_MASK); | |
309a3e00 | 314 | gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT; |
27a28d32 JK |
315 | |
316 | /* Offset of GND cable */ | |
317 | gnd_type |= MAX77843_MUIC_GND_USB_HOST; | |
318 | cable_type = info->prev_gnd_type = gnd_type; | |
319 | } | |
320 | break; | |
321 | default: | |
322 | dev_err(info->dev, "Unknown cable group (%d)\n", group); | |
323 | cable_type = -EINVAL; | |
324 | break; | |
325 | } | |
326 | ||
327 | return cable_type; | |
328 | } | |
329 | ||
330 | static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info) | |
331 | { | |
332 | int ret, gnd_cable_type; | |
333 | bool attached; | |
334 | ||
335 | gnd_cable_type = max77843_muic_get_cable_type(info, | |
336 | MAX77843_CABLE_GROUP_ADC_GND, &attached); | |
337 | dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n", | |
338 | attached ? "attached" : "detached", gnd_cable_type); | |
339 | ||
340 | switch (gnd_cable_type) { | |
341 | case MAX77843_MUIC_GND_USB_HOST: | |
342 | case MAX77843_MUIC_GND_USB_HOST_VB: | |
309a3e00 KK |
343 | ret = max77843_muic_set_path(info, |
344 | MAX77843_MUIC_CONTROL1_SW_USB, | |
345 | attached); | |
27a28d32 JK |
346 | if (ret < 0) |
347 | return ret; | |
348 | ||
8670b459 | 349 | extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); |
27a28d32 JK |
350 | break; |
351 | case MAX77843_MUIC_GND_MHL_VB: | |
352 | case MAX77843_MUIC_GND_MHL: | |
309a3e00 KK |
353 | ret = max77843_muic_set_path(info, |
354 | MAX77843_MUIC_CONTROL1_SW_OPEN, | |
355 | attached); | |
27a28d32 JK |
356 | if (ret < 0) |
357 | return ret; | |
358 | ||
8670b459 | 359 | extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); |
27a28d32 JK |
360 | break; |
361 | default: | |
362 | dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n", | |
363 | attached ? "attached" : "detached", gnd_cable_type); | |
364 | return -EINVAL; | |
365 | } | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | static int max77843_muic_jig_handler(struct max77843_muic_info *info, | |
371 | int cable_type, bool attached) | |
372 | { | |
373 | int ret; | |
309a3e00 | 374 | u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN; |
27a28d32 JK |
375 | |
376 | dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n", | |
377 | attached ? "attached" : "detached", cable_type); | |
378 | ||
379 | switch (cable_type) { | |
380 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
27a28d32 | 381 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: |
309a3e00 | 382 | path = MAX77843_MUIC_CONTROL1_SW_USB; |
27a28d32 JK |
383 | break; |
384 | case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
309a3e00 | 385 | path = MAX77843_MUIC_CONTROL1_SW_UART; |
27a28d32 JK |
386 | break; |
387 | default: | |
41b3c015 | 388 | return -EINVAL; |
27a28d32 JK |
389 | } |
390 | ||
41b3c015 CC |
391 | ret = max77843_muic_set_path(info, path, attached); |
392 | if (ret < 0) | |
393 | return ret; | |
394 | ||
8670b459 | 395 | extcon_set_state_sync(info->edev, EXTCON_JIG, attached); |
41b3c015 | 396 | |
27a28d32 JK |
397 | return 0; |
398 | } | |
399 | ||
400 | static int max77843_muic_adc_handler(struct max77843_muic_info *info) | |
401 | { | |
402 | int ret, cable_type; | |
403 | bool attached; | |
404 | ||
405 | cable_type = max77843_muic_get_cable_type(info, | |
406 | MAX77843_CABLE_GROUP_ADC, &attached); | |
407 | ||
408 | dev_dbg(info->dev, | |
409 | "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", | |
410 | attached ? "attached" : "detached", cable_type, | |
411 | info->prev_cable_type); | |
412 | ||
413 | switch (cable_type) { | |
414 | case MAX77843_MUIC_ADC_GROUND: | |
415 | ret = max77843_muic_adc_gnd_handler(info); | |
416 | if (ret < 0) | |
417 | return ret; | |
418 | break; | |
419 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
420 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: | |
421 | case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
422 | ret = max77843_muic_jig_handler(info, cable_type, attached); | |
423 | if (ret < 0) | |
424 | return ret; | |
425 | break; | |
426 | case MAX77843_MUIC_ADC_SEND_END_BUTTON: | |
427 | case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON: | |
428 | case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON: | |
429 | case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON: | |
430 | case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON: | |
431 | case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON: | |
432 | case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON: | |
433 | case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON: | |
434 | case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON: | |
435 | case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON: | |
436 | case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON: | |
437 | case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON: | |
438 | case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON: | |
439 | case MAX77843_MUIC_ADC_RESERVED_ACC_1: | |
440 | case MAX77843_MUIC_ADC_RESERVED_ACC_2: | |
441 | case MAX77843_MUIC_ADC_RESERVED_ACC_3: | |
442 | case MAX77843_MUIC_ADC_RESERVED_ACC_4: | |
443 | case MAX77843_MUIC_ADC_RESERVED_ACC_5: | |
444 | case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2: | |
445 | case MAX77843_MUIC_ADC_PHONE_POWERED_DEV: | |
446 | case MAX77843_MUIC_ADC_TTY_CONVERTER: | |
447 | case MAX77843_MUIC_ADC_UART_CABLE: | |
448 | case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG: | |
449 | case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD: | |
450 | case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG: | |
451 | case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON: | |
452 | case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1: | |
453 | case MAX77843_MUIC_ADC_OPEN: | |
454 | dev_err(info->dev, | |
455 | "accessory is %s but it isn't used (adc:0x%x)\n", | |
456 | attached ? "attached" : "detached", cable_type); | |
457 | return -EAGAIN; | |
458 | default: | |
459 | dev_err(info->dev, | |
460 | "failed to detect %s accessory (adc:0x%x)\n", | |
461 | attached ? "attached" : "detached", cable_type); | |
462 | return -EINVAL; | |
463 | } | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
468 | static int max77843_muic_chg_handler(struct max77843_muic_info *info) | |
469 | { | |
470 | int ret, chg_type, gnd_type; | |
471 | bool attached; | |
472 | ||
473 | chg_type = max77843_muic_get_cable_type(info, | |
474 | MAX77843_CABLE_GROUP_CHG, &attached); | |
475 | ||
476 | dev_dbg(info->dev, | |
477 | "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", | |
478 | attached ? "attached" : "detached", | |
479 | chg_type, info->prev_chg_type); | |
480 | ||
481 | switch (chg_type) { | |
482 | case MAX77843_MUIC_CHG_USB: | |
309a3e00 KK |
483 | ret = max77843_muic_set_path(info, |
484 | MAX77843_MUIC_CONTROL1_SW_USB, | |
485 | attached); | |
27a28d32 JK |
486 | if (ret < 0) |
487 | return ret; | |
488 | ||
8670b459 CC |
489 | extcon_set_state_sync(info->edev, EXTCON_USB, attached); |
490 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, | |
8b45b6a0 | 491 | attached); |
27a28d32 JK |
492 | break; |
493 | case MAX77843_MUIC_CHG_DOWNSTREAM: | |
309a3e00 KK |
494 | ret = max77843_muic_set_path(info, |
495 | MAX77843_MUIC_CONTROL1_SW_OPEN, | |
496 | attached); | |
27a28d32 JK |
497 | if (ret < 0) |
498 | return ret; | |
499 | ||
8670b459 | 500 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, |
2a9de9c0 | 501 | attached); |
27a28d32 JK |
502 | break; |
503 | case MAX77843_MUIC_CHG_DEDICATED: | |
309a3e00 KK |
504 | ret = max77843_muic_set_path(info, |
505 | MAX77843_MUIC_CONTROL1_SW_OPEN, | |
506 | attached); | |
27a28d32 JK |
507 | if (ret < 0) |
508 | return ret; | |
509 | ||
8670b459 | 510 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, |
11eecf91 | 511 | attached); |
27a28d32 JK |
512 | break; |
513 | case MAX77843_MUIC_CHG_SPECIAL_500MA: | |
309a3e00 KK |
514 | ret = max77843_muic_set_path(info, |
515 | MAX77843_MUIC_CONTROL1_SW_OPEN, | |
516 | attached); | |
27a28d32 JK |
517 | if (ret < 0) |
518 | return ret; | |
519 | ||
8670b459 | 520 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, |
2a9de9c0 | 521 | attached); |
27a28d32 JK |
522 | break; |
523 | case MAX77843_MUIC_CHG_SPECIAL_1A: | |
309a3e00 KK |
524 | ret = max77843_muic_set_path(info, |
525 | MAX77843_MUIC_CONTROL1_SW_OPEN, | |
526 | attached); | |
27a28d32 JK |
527 | if (ret < 0) |
528 | return ret; | |
529 | ||
8670b459 | 530 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, |
2a9de9c0 | 531 | attached); |
27a28d32 JK |
532 | break; |
533 | case MAX77843_MUIC_CHG_GND: | |
534 | gnd_type = max77843_muic_get_cable_type(info, | |
535 | MAX77843_CABLE_GROUP_ADC_GND, &attached); | |
536 | ||
537 | /* Charger cable on MHL accessory is attach or detach */ | |
538 | if (gnd_type == MAX77843_MUIC_GND_MHL_VB) | |
8670b459 | 539 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, |
11eecf91 | 540 | true); |
27a28d32 | 541 | else if (gnd_type == MAX77843_MUIC_GND_MHL) |
8670b459 | 542 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, |
11eecf91 | 543 | false); |
27a28d32 JK |
544 | break; |
545 | case MAX77843_MUIC_CHG_NONE: | |
546 | break; | |
547 | default: | |
548 | dev_err(info->dev, | |
549 | "failed to detect %s accessory (chg_type:0x%x)\n", | |
550 | attached ? "attached" : "detached", chg_type); | |
551 | ||
309a3e00 KK |
552 | max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN, |
553 | attached); | |
27a28d32 JK |
554 | return -EINVAL; |
555 | } | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
560 | static void max77843_muic_irq_work(struct work_struct *work) | |
561 | { | |
562 | struct max77843_muic_info *info = container_of(work, | |
563 | struct max77843_muic_info, irq_work); | |
bc1aadc1 | 564 | struct max77693_dev *max77843 = info->max77843; |
27a28d32 JK |
565 | int ret = 0; |
566 | ||
567 | mutex_lock(&info->mutex); | |
568 | ||
569 | ret = regmap_bulk_read(max77843->regmap_muic, | |
570 | MAX77843_MUIC_REG_STATUS1, info->status, | |
571 | MAX77843_MUIC_STATUS_NUM); | |
572 | if (ret) { | |
573 | dev_err(info->dev, "Cannot read STATUS registers\n"); | |
574 | mutex_unlock(&info->mutex); | |
575 | return; | |
576 | } | |
577 | ||
578 | if (info->irq_adc) { | |
579 | ret = max77843_muic_adc_handler(info); | |
580 | if (ret) | |
581 | dev_err(info->dev, "Unknown cable type\n"); | |
582 | info->irq_adc = false; | |
583 | } | |
584 | ||
585 | if (info->irq_chg) { | |
586 | ret = max77843_muic_chg_handler(info); | |
587 | if (ret) | |
588 | dev_err(info->dev, "Unknown charger type\n"); | |
589 | info->irq_chg = false; | |
590 | } | |
591 | ||
592 | mutex_unlock(&info->mutex); | |
593 | } | |
594 | ||
595 | static irqreturn_t max77843_muic_irq_handler(int irq, void *data) | |
596 | { | |
597 | struct max77843_muic_info *info = data; | |
598 | int i, irq_type = -1; | |
599 | ||
600 | for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) | |
601 | if (irq == max77843_muic_irqs[i].virq) | |
602 | irq_type = max77843_muic_irqs[i].irq; | |
603 | ||
604 | switch (irq_type) { | |
605 | case MAX77843_MUIC_IRQ_INT1_ADC: | |
606 | case MAX77843_MUIC_IRQ_INT1_ADCERROR: | |
607 | case MAX77843_MUIC_IRQ_INT1_ADC1K: | |
608 | info->irq_adc = true; | |
609 | break; | |
610 | case MAX77843_MUIC_IRQ_INT2_CHGTYP: | |
611 | case MAX77843_MUIC_IRQ_INT2_CHGDETRUN: | |
612 | case MAX77843_MUIC_IRQ_INT2_DCDTMR: | |
613 | case MAX77843_MUIC_IRQ_INT2_DXOVP: | |
614 | case MAX77843_MUIC_IRQ_INT2_VBVOLT: | |
615 | info->irq_chg = true; | |
616 | break; | |
617 | case MAX77843_MUIC_IRQ_INT3_VBADC: | |
618 | case MAX77843_MUIC_IRQ_INT3_VDNMON: | |
619 | case MAX77843_MUIC_IRQ_INT3_DNRES: | |
620 | case MAX77843_MUIC_IRQ_INT3_MPNACK: | |
621 | case MAX77843_MUIC_IRQ_INT3_MRXBUFOW: | |
622 | case MAX77843_MUIC_IRQ_INT3_MRXTRF: | |
623 | case MAX77843_MUIC_IRQ_INT3_MRXPERR: | |
624 | case MAX77843_MUIC_IRQ_INT3_MRXRDY: | |
625 | break; | |
626 | default: | |
627 | dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type); | |
628 | break; | |
629 | } | |
630 | ||
631 | schedule_work(&info->irq_work); | |
632 | ||
633 | return IRQ_HANDLED; | |
634 | } | |
635 | ||
636 | static void max77843_muic_detect_cable_wq(struct work_struct *work) | |
637 | { | |
638 | struct max77843_muic_info *info = container_of(to_delayed_work(work), | |
639 | struct max77843_muic_info, wq_detcable); | |
bc1aadc1 | 640 | struct max77693_dev *max77843 = info->max77843; |
27a28d32 JK |
641 | int chg_type, adc, ret; |
642 | bool attached; | |
643 | ||
644 | mutex_lock(&info->mutex); | |
645 | ||
646 | ret = regmap_bulk_read(max77843->regmap_muic, | |
647 | MAX77843_MUIC_REG_STATUS1, info->status, | |
648 | MAX77843_MUIC_STATUS_NUM); | |
649 | if (ret) { | |
650 | dev_err(info->dev, "Cannot read STATUS registers\n"); | |
651 | goto err_cable_wq; | |
652 | } | |
653 | ||
654 | adc = max77843_muic_get_cable_type(info, | |
655 | MAX77843_CABLE_GROUP_ADC, &attached); | |
656 | if (attached && adc != MAX77843_MUIC_ADC_OPEN) { | |
657 | ret = max77843_muic_adc_handler(info); | |
658 | if (ret < 0) { | |
659 | dev_err(info->dev, "Cannot detect accessory\n"); | |
660 | goto err_cable_wq; | |
661 | } | |
662 | } | |
663 | ||
664 | chg_type = max77843_muic_get_cable_type(info, | |
665 | MAX77843_CABLE_GROUP_CHG, &attached); | |
666 | if (attached && chg_type != MAX77843_MUIC_CHG_NONE) { | |
667 | ret = max77843_muic_chg_handler(info); | |
668 | if (ret < 0) { | |
669 | dev_err(info->dev, "Cannot detect charger accessory\n"); | |
670 | goto err_cable_wq; | |
671 | } | |
672 | } | |
673 | ||
674 | err_cable_wq: | |
675 | mutex_unlock(&info->mutex); | |
676 | } | |
677 | ||
678 | static int max77843_muic_set_debounce_time(struct max77843_muic_info *info, | |
679 | enum max77843_muic_adc_debounce_time time) | |
680 | { | |
bc1aadc1 | 681 | struct max77693_dev *max77843 = info->max77843; |
d927c590 | 682 | int ret; |
27a28d32 JK |
683 | |
684 | switch (time) { | |
685 | case MAX77843_DEBOUNCE_TIME_5MS: | |
686 | case MAX77843_DEBOUNCE_TIME_10MS: | |
687 | case MAX77843_DEBOUNCE_TIME_25MS: | |
688 | case MAX77843_DEBOUNCE_TIME_38_62MS: | |
689 | ret = regmap_update_bits(max77843->regmap_muic, | |
690 | MAX77843_MUIC_REG_CONTROL4, | |
691 | MAX77843_MUIC_CONTROL4_ADCDBSET_MASK, | |
309a3e00 | 692 | time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT); |
27a28d32 JK |
693 | if (ret < 0) { |
694 | dev_err(info->dev, "Cannot write MUIC regmap\n"); | |
695 | return ret; | |
696 | } | |
697 | break; | |
698 | default: | |
699 | dev_err(info->dev, "Invalid ADC debounce time\n"); | |
700 | return -EINVAL; | |
701 | } | |
702 | ||
703 | return 0; | |
704 | } | |
705 | ||
bc1aadc1 | 706 | static int max77843_init_muic_regmap(struct max77693_dev *max77843) |
27a28d32 JK |
707 | { |
708 | int ret; | |
709 | ||
710 | max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter, | |
711 | I2C_ADDR_MUIC); | |
712 | if (!max77843->i2c_muic) { | |
713 | dev_err(&max77843->i2c->dev, | |
714 | "Cannot allocate I2C device for MUIC\n"); | |
b9b518f5 | 715 | return -ENOMEM; |
27a28d32 JK |
716 | } |
717 | ||
718 | i2c_set_clientdata(max77843->i2c_muic, max77843); | |
719 | ||
720 | max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic, | |
721 | &max77843_muic_regmap_config); | |
722 | if (IS_ERR(max77843->regmap_muic)) { | |
723 | ret = PTR_ERR(max77843->regmap_muic); | |
724 | goto err_muic_i2c; | |
725 | } | |
726 | ||
727 | ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq, | |
728 | IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, | |
729 | 0, &max77843_muic_irq_chip, &max77843->irq_data_muic); | |
730 | if (ret < 0) { | |
731 | dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n"); | |
732 | goto err_muic_i2c; | |
733 | } | |
734 | ||
735 | return 0; | |
736 | ||
737 | err_muic_i2c: | |
738 | i2c_unregister_device(max77843->i2c_muic); | |
739 | ||
740 | return ret; | |
741 | } | |
742 | ||
743 | static int max77843_muic_probe(struct platform_device *pdev) | |
744 | { | |
bc1aadc1 | 745 | struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent); |
27a28d32 JK |
746 | struct max77843_muic_info *info; |
747 | unsigned int id; | |
748 | int i, ret; | |
749 | ||
750 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
751 | if (!info) | |
752 | return -ENOMEM; | |
753 | ||
754 | info->dev = &pdev->dev; | |
755 | info->max77843 = max77843; | |
756 | ||
757 | platform_set_drvdata(pdev, info); | |
758 | mutex_init(&info->mutex); | |
759 | ||
760 | /* Initialize i2c and regmap */ | |
761 | ret = max77843_init_muic_regmap(max77843); | |
762 | if (ret) { | |
763 | dev_err(&pdev->dev, "Failed to init MUIC regmap\n"); | |
764 | return ret; | |
765 | } | |
766 | ||
767 | /* Turn off auto detection configuration */ | |
768 | ret = regmap_update_bits(max77843->regmap_muic, | |
769 | MAX77843_MUIC_REG_CONTROL4, | |
770 | MAX77843_MUIC_CONTROL4_USBAUTO_MASK | | |
771 | MAX77843_MUIC_CONTROL4_FCTAUTO_MASK, | |
772 | CONTROL4_AUTO_DISABLE); | |
773 | ||
774 | /* Initialize extcon device */ | |
775 | info->edev = devm_extcon_dev_allocate(&pdev->dev, | |
776 | max77843_extcon_cable); | |
777 | if (IS_ERR(info->edev)) { | |
778 | dev_err(&pdev->dev, "Failed to allocate memory for extcon\n"); | |
779 | ret = -ENODEV; | |
780 | goto err_muic_irq; | |
781 | } | |
782 | ||
783 | ret = devm_extcon_dev_register(&pdev->dev, info->edev); | |
784 | if (ret) { | |
785 | dev_err(&pdev->dev, "Failed to register extcon device\n"); | |
786 | goto err_muic_irq; | |
787 | } | |
788 | ||
789 | /* Set ADC debounce time */ | |
790 | max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS); | |
791 | ||
792 | /* Set initial path for UART */ | |
309a3e00 | 793 | max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, true); |
27a28d32 JK |
794 | |
795 | /* Check revision number of MUIC device */ | |
796 | ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id); | |
797 | if (ret < 0) { | |
798 | dev_err(&pdev->dev, "Failed to read revision number\n"); | |
799 | goto err_muic_irq; | |
800 | } | |
801 | dev_info(info->dev, "MUIC device ID : 0x%x\n", id); | |
802 | ||
803 | /* Support virtual irq domain for max77843 MUIC device */ | |
804 | INIT_WORK(&info->irq_work, max77843_muic_irq_work); | |
805 | ||
135d9f7d JK |
806 | /* Clear IRQ bits before request IRQs */ |
807 | ret = regmap_bulk_read(max77843->regmap_muic, | |
808 | MAX77843_MUIC_REG_INT1, info->status, | |
c4924e92 | 809 | MAX77843_MUIC_STATUS_NUM); |
135d9f7d JK |
810 | if (ret) { |
811 | dev_err(&pdev->dev, "Failed to Clear IRQ bits\n"); | |
812 | goto err_muic_irq; | |
813 | } | |
814 | ||
27a28d32 JK |
815 | for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) { |
816 | struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i]; | |
c05c0d54 | 817 | int virq = 0; |
27a28d32 JK |
818 | |
819 | virq = regmap_irq_get_virq(max77843->irq_data_muic, | |
820 | muic_irq->irq); | |
821 | if (virq <= 0) { | |
822 | ret = -EINVAL; | |
823 | goto err_muic_irq; | |
824 | } | |
825 | muic_irq->virq = virq; | |
826 | ||
827 | ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, | |
828 | max77843_muic_irq_handler, IRQF_NO_SUSPEND, | |
829 | muic_irq->name, info); | |
830 | if (ret) { | |
831 | dev_err(&pdev->dev, | |
832 | "Failed to request irq (IRQ: %d, error: %d)\n", | |
833 | muic_irq->irq, ret); | |
834 | goto err_muic_irq; | |
835 | } | |
836 | } | |
837 | ||
838 | /* Detect accessory after completing the initialization of platform */ | |
839 | INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq); | |
840 | queue_delayed_work(system_power_efficient_wq, | |
841 | &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT)); | |
842 | ||
843 | return 0; | |
844 | ||
845 | err_muic_irq: | |
846 | regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); | |
847 | i2c_unregister_device(max77843->i2c_muic); | |
848 | ||
849 | return ret; | |
850 | } | |
851 | ||
852 | static int max77843_muic_remove(struct platform_device *pdev) | |
853 | { | |
854 | struct max77843_muic_info *info = platform_get_drvdata(pdev); | |
bc1aadc1 | 855 | struct max77693_dev *max77843 = info->max77843; |
27a28d32 JK |
856 | |
857 | cancel_work_sync(&info->irq_work); | |
858 | regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); | |
859 | i2c_unregister_device(max77843->i2c_muic); | |
860 | ||
861 | return 0; | |
862 | } | |
863 | ||
864 | static const struct platform_device_id max77843_muic_id[] = { | |
865 | { "max77843-muic", }, | |
866 | { /* sentinel */ }, | |
867 | }; | |
868 | MODULE_DEVICE_TABLE(platform, max77843_muic_id); | |
869 | ||
870 | static struct platform_driver max77843_muic_driver = { | |
871 | .driver = { | |
872 | .name = "max77843-muic", | |
873 | }, | |
874 | .probe = max77843_muic_probe, | |
875 | .remove = max77843_muic_remove, | |
876 | .id_table = max77843_muic_id, | |
877 | }; | |
878 | ||
879 | static int __init max77843_muic_init(void) | |
880 | { | |
881 | return platform_driver_register(&max77843_muic_driver); | |
882 | } | |
883 | subsys_initcall(max77843_muic_init); | |
884 | ||
885 | MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver"); | |
886 | MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); | |
887 | MODULE_LICENSE("GPL"); |