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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, | |
11eecf91 CC |
125 | EXTCON_CHG_USB_DCP, |
126 | EXTCON_CHG_USB_CDP, | |
127 | EXTCON_CHG_USB_FAST, | |
128 | EXTCON_CHG_USB_SLOW, | |
129 | EXTCON_DISP_MHL, | |
2a9de9c0 CC |
130 | EXTCON_JIG, |
131 | EXTCON_NONE, | |
27a28d32 JK |
132 | }; |
133 | ||
134 | struct max77843_muic_irq { | |
135 | unsigned int irq; | |
136 | const char *name; | |
137 | unsigned int virq; | |
138 | }; | |
139 | ||
140 | static struct max77843_muic_irq max77843_muic_irqs[] = { | |
141 | { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" }, | |
142 | { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" }, | |
143 | { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" }, | |
144 | { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" }, | |
145 | { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" }, | |
146 | { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" }, | |
147 | { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" }, | |
148 | { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" }, | |
149 | { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" }, | |
150 | { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" }, | |
151 | { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" }, | |
152 | { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"}, | |
153 | { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"}, | |
154 | { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"}, | |
155 | { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"}, | |
156 | { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"}, | |
157 | }; | |
158 | ||
159 | static const struct regmap_config max77843_muic_regmap_config = { | |
160 | .reg_bits = 8, | |
161 | .val_bits = 8, | |
162 | .max_register = MAX77843_MUIC_REG_END, | |
163 | }; | |
164 | ||
165 | static const struct regmap_irq max77843_muic_irq[] = { | |
166 | /* INT1 interrupt */ | |
167 | { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, }, | |
168 | { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, }, | |
169 | { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, }, | |
170 | ||
171 | /* INT2 interrupt */ | |
172 | { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, }, | |
173 | { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, }, | |
174 | { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, }, | |
175 | { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, }, | |
176 | { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, }, | |
177 | ||
178 | /* INT3 interrupt */ | |
179 | { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, }, | |
180 | { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, }, | |
181 | { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, }, | |
182 | { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, }, | |
183 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, }, | |
184 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, }, | |
185 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, }, | |
186 | { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, }, | |
187 | }; | |
188 | ||
189 | static const struct regmap_irq_chip max77843_muic_irq_chip = { | |
190 | .name = "max77843-muic", | |
191 | .status_base = MAX77843_MUIC_REG_INT1, | |
192 | .mask_base = MAX77843_MUIC_REG_INTMASK1, | |
193 | .mask_invert = true, | |
194 | .num_regs = 3, | |
195 | .irqs = max77843_muic_irq, | |
196 | .num_irqs = ARRAY_SIZE(max77843_muic_irq), | |
197 | }; | |
198 | ||
199 | static int max77843_muic_set_path(struct max77843_muic_info *info, | |
200 | u8 val, bool attached) | |
201 | { | |
bc1aadc1 | 202 | struct max77693_dev *max77843 = info->max77843; |
27a28d32 JK |
203 | int ret = 0; |
204 | unsigned int ctrl1, ctrl2; | |
205 | ||
206 | if (attached) | |
207 | ctrl1 = val; | |
208 | else | |
309a3e00 | 209 | ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN; |
27a28d32 JK |
210 | |
211 | ret = regmap_update_bits(max77843->regmap_muic, | |
212 | MAX77843_MUIC_REG_CONTROL1, | |
309a3e00 | 213 | MAX77843_MUIC_CONTROL1_COM_SW, ctrl1); |
27a28d32 JK |
214 | if (ret < 0) { |
215 | dev_err(info->dev, "Cannot switch MUIC port\n"); | |
216 | return ret; | |
217 | } | |
218 | ||
219 | if (attached) | |
220 | ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK; | |
221 | else | |
222 | ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK; | |
223 | ||
224 | ret = regmap_update_bits(max77843->regmap_muic, | |
225 | MAX77843_MUIC_REG_CONTROL2, | |
226 | MAX77843_MUIC_CONTROL2_LOWPWR_MASK | | |
227 | MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2); | |
228 | if (ret < 0) { | |
229 | dev_err(info->dev, "Cannot update lowpower mode\n"); | |
230 | return ret; | |
231 | } | |
232 | ||
233 | dev_dbg(info->dev, | |
234 | "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", | |
235 | ctrl1, ctrl2, attached ? "attached" : "detached"); | |
236 | ||
237 | return 0; | |
238 | } | |
239 | ||
240 | static int max77843_muic_get_cable_type(struct max77843_muic_info *info, | |
241 | enum max77843_muic_cable_group group, bool *attached) | |
242 | { | |
243 | int adc, chg_type, cable_type, gnd_type; | |
244 | ||
245 | adc = info->status[MAX77843_MUIC_STATUS1] & | |
246 | MAX77843_MUIC_STATUS1_ADC_MASK; | |
309a3e00 | 247 | adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT; |
27a28d32 JK |
248 | |
249 | switch (group) { | |
250 | case MAX77843_CABLE_GROUP_ADC: | |
251 | if (adc == MAX77843_MUIC_ADC_OPEN) { | |
252 | *attached = false; | |
253 | cable_type = info->prev_cable_type; | |
254 | info->prev_cable_type = MAX77843_MUIC_ADC_OPEN; | |
255 | } else { | |
256 | *attached = true; | |
257 | cable_type = info->prev_cable_type = adc; | |
258 | } | |
259 | break; | |
260 | case MAX77843_CABLE_GROUP_CHG: | |
261 | chg_type = info->status[MAX77843_MUIC_STATUS2] & | |
262 | MAX77843_MUIC_STATUS2_CHGTYP_MASK; | |
263 | ||
264 | /* Check GROUND accessory with charger cable */ | |
265 | if (adc == MAX77843_MUIC_ADC_GROUND) { | |
266 | if (chg_type == MAX77843_MUIC_CHG_NONE) { | |
267 | /* The following state when charger cable is | |
268 | * disconnected but the GROUND accessory still | |
269 | * connected */ | |
270 | *attached = false; | |
271 | cable_type = info->prev_chg_type; | |
272 | info->prev_chg_type = MAX77843_MUIC_CHG_NONE; | |
273 | } else { | |
274 | ||
275 | /* The following state when charger cable is | |
276 | * connected on the GROUND accessory */ | |
277 | *attached = true; | |
278 | cable_type = MAX77843_MUIC_CHG_GND; | |
279 | info->prev_chg_type = MAX77843_MUIC_CHG_GND; | |
280 | } | |
281 | break; | |
282 | } | |
283 | ||
284 | if (chg_type == MAX77843_MUIC_CHG_NONE) { | |
285 | *attached = false; | |
286 | cable_type = info->prev_chg_type; | |
287 | info->prev_chg_type = MAX77843_MUIC_CHG_NONE; | |
288 | } else { | |
289 | *attached = true; | |
290 | cable_type = info->prev_chg_type = chg_type; | |
291 | } | |
292 | break; | |
293 | case MAX77843_CABLE_GROUP_ADC_GND: | |
294 | if (adc == MAX77843_MUIC_ADC_OPEN) { | |
295 | *attached = false; | |
296 | cable_type = info->prev_gnd_type; | |
297 | info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN; | |
298 | } else { | |
299 | *attached = true; | |
300 | ||
301 | /* Offset|ADC1K|VBVolt| | |
302 | * 0x1| 0| 0| USB-HOST | |
303 | * 0x1| 0| 1| USB-HOST with VB | |
304 | * 0x1| 1| 0| MHL | |
305 | * 0x1| 1| 1| MHL with VB */ | |
306 | /* Get ADC1K register bit */ | |
307 | gnd_type = (info->status[MAX77843_MUIC_STATUS1] & | |
308 | MAX77843_MUIC_STATUS1_ADC1K_MASK); | |
309 | ||
310 | /* Get VBVolt register bit */ | |
311 | gnd_type |= (info->status[MAX77843_MUIC_STATUS2] & | |
312 | MAX77843_MUIC_STATUS2_VBVOLT_MASK); | |
309a3e00 | 313 | gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT; |
27a28d32 JK |
314 | |
315 | /* Offset of GND cable */ | |
316 | gnd_type |= MAX77843_MUIC_GND_USB_HOST; | |
317 | cable_type = info->prev_gnd_type = gnd_type; | |
318 | } | |
319 | break; | |
320 | default: | |
321 | dev_err(info->dev, "Unknown cable group (%d)\n", group); | |
322 | cable_type = -EINVAL; | |
323 | break; | |
324 | } | |
325 | ||
326 | return cable_type; | |
327 | } | |
328 | ||
329 | static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info) | |
330 | { | |
331 | int ret, gnd_cable_type; | |
332 | bool attached; | |
333 | ||
334 | gnd_cable_type = max77843_muic_get_cable_type(info, | |
335 | MAX77843_CABLE_GROUP_ADC_GND, &attached); | |
336 | dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n", | |
337 | attached ? "attached" : "detached", gnd_cable_type); | |
338 | ||
339 | switch (gnd_cable_type) { | |
340 | case MAX77843_MUIC_GND_USB_HOST: | |
341 | case MAX77843_MUIC_GND_USB_HOST_VB: | |
309a3e00 KK |
342 | ret = max77843_muic_set_path(info, |
343 | MAX77843_MUIC_CONTROL1_SW_USB, | |
344 | attached); | |
27a28d32 JK |
345 | if (ret < 0) |
346 | return ret; | |
347 | ||
2a9de9c0 | 348 | extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, attached); |
27a28d32 JK |
349 | break; |
350 | case MAX77843_MUIC_GND_MHL_VB: | |
351 | case MAX77843_MUIC_GND_MHL: | |
309a3e00 KK |
352 | ret = max77843_muic_set_path(info, |
353 | MAX77843_MUIC_CONTROL1_SW_OPEN, | |
354 | attached); | |
27a28d32 JK |
355 | if (ret < 0) |
356 | return ret; | |
357 | ||
11eecf91 | 358 | extcon_set_cable_state_(info->edev, EXTCON_DISP_MHL, attached); |
27a28d32 JK |
359 | break; |
360 | default: | |
361 | dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n", | |
362 | attached ? "attached" : "detached", gnd_cable_type); | |
363 | return -EINVAL; | |
364 | } | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
369 | static int max77843_muic_jig_handler(struct max77843_muic_info *info, | |
370 | int cable_type, bool attached) | |
371 | { | |
372 | int ret; | |
309a3e00 | 373 | u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN; |
27a28d32 JK |
374 | |
375 | dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n", | |
376 | attached ? "attached" : "detached", cable_type); | |
377 | ||
378 | switch (cable_type) { | |
379 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
27a28d32 | 380 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: |
309a3e00 | 381 | path = MAX77843_MUIC_CONTROL1_SW_USB; |
27a28d32 JK |
382 | break; |
383 | case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
309a3e00 | 384 | path = MAX77843_MUIC_CONTROL1_SW_UART; |
27a28d32 JK |
385 | break; |
386 | default: | |
41b3c015 | 387 | return -EINVAL; |
27a28d32 JK |
388 | } |
389 | ||
41b3c015 CC |
390 | ret = max77843_muic_set_path(info, path, attached); |
391 | if (ret < 0) | |
392 | return ret; | |
393 | ||
2a9de9c0 | 394 | extcon_set_cable_state_(info->edev, EXTCON_JIG, attached); |
41b3c015 | 395 | |
27a28d32 JK |
396 | return 0; |
397 | } | |
398 | ||
399 | static int max77843_muic_adc_handler(struct max77843_muic_info *info) | |
400 | { | |
401 | int ret, cable_type; | |
402 | bool attached; | |
403 | ||
404 | cable_type = max77843_muic_get_cable_type(info, | |
405 | MAX77843_CABLE_GROUP_ADC, &attached); | |
406 | ||
407 | dev_dbg(info->dev, | |
408 | "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", | |
409 | attached ? "attached" : "detached", cable_type, | |
410 | info->prev_cable_type); | |
411 | ||
412 | switch (cable_type) { | |
413 | case MAX77843_MUIC_ADC_GROUND: | |
414 | ret = max77843_muic_adc_gnd_handler(info); | |
415 | if (ret < 0) | |
416 | return ret; | |
417 | break; | |
418 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
419 | case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: | |
420 | case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
421 | ret = max77843_muic_jig_handler(info, cable_type, attached); | |
422 | if (ret < 0) | |
423 | return ret; | |
424 | break; | |
425 | case MAX77843_MUIC_ADC_SEND_END_BUTTON: | |
426 | case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON: | |
427 | case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON: | |
428 | case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON: | |
429 | case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON: | |
430 | case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON: | |
431 | case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON: | |
432 | case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON: | |
433 | case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON: | |
434 | case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON: | |
435 | case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON: | |
436 | case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON: | |
437 | case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON: | |
438 | case MAX77843_MUIC_ADC_RESERVED_ACC_1: | |
439 | case MAX77843_MUIC_ADC_RESERVED_ACC_2: | |
440 | case MAX77843_MUIC_ADC_RESERVED_ACC_3: | |
441 | case MAX77843_MUIC_ADC_RESERVED_ACC_4: | |
442 | case MAX77843_MUIC_ADC_RESERVED_ACC_5: | |
443 | case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2: | |
444 | case MAX77843_MUIC_ADC_PHONE_POWERED_DEV: | |
445 | case MAX77843_MUIC_ADC_TTY_CONVERTER: | |
446 | case MAX77843_MUIC_ADC_UART_CABLE: | |
447 | case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG: | |
448 | case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD: | |
449 | case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG: | |
450 | case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON: | |
451 | case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1: | |
452 | case MAX77843_MUIC_ADC_OPEN: | |
453 | dev_err(info->dev, | |
454 | "accessory is %s but it isn't used (adc:0x%x)\n", | |
455 | attached ? "attached" : "detached", cable_type); | |
456 | return -EAGAIN; | |
457 | default: | |
458 | dev_err(info->dev, | |
459 | "failed to detect %s accessory (adc:0x%x)\n", | |
460 | attached ? "attached" : "detached", cable_type); | |
461 | return -EINVAL; | |
462 | } | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | static int max77843_muic_chg_handler(struct max77843_muic_info *info) | |
468 | { | |
469 | int ret, chg_type, gnd_type; | |
470 | bool attached; | |
471 | ||
472 | chg_type = max77843_muic_get_cable_type(info, | |
473 | MAX77843_CABLE_GROUP_CHG, &attached); | |
474 | ||
475 | dev_dbg(info->dev, | |
476 | "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", | |
477 | attached ? "attached" : "detached", | |
478 | chg_type, info->prev_chg_type); | |
479 | ||
480 | switch (chg_type) { | |
481 | case MAX77843_MUIC_CHG_USB: | |
309a3e00 KK |
482 | ret = max77843_muic_set_path(info, |
483 | MAX77843_MUIC_CONTROL1_SW_USB, | |
484 | attached); | |
27a28d32 JK |
485 | if (ret < 0) |
486 | return ret; | |
487 | ||
2a9de9c0 | 488 | extcon_set_cable_state_(info->edev, EXTCON_USB, attached); |
27a28d32 JK |
489 | break; |
490 | case MAX77843_MUIC_CHG_DOWNSTREAM: | |
309a3e00 KK |
491 | ret = max77843_muic_set_path(info, |
492 | MAX77843_MUIC_CONTROL1_SW_OPEN, | |
493 | attached); | |
27a28d32 JK |
494 | if (ret < 0) |
495 | return ret; | |
496 | ||
11eecf91 | 497 | extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_CDP, |
2a9de9c0 | 498 | attached); |
27a28d32 JK |
499 | break; |
500 | case MAX77843_MUIC_CHG_DEDICATED: | |
309a3e00 KK |
501 | ret = max77843_muic_set_path(info, |
502 | MAX77843_MUIC_CONTROL1_SW_OPEN, | |
503 | attached); | |
27a28d32 JK |
504 | if (ret < 0) |
505 | return ret; | |
506 | ||
11eecf91 CC |
507 | extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_DCP, |
508 | attached); | |
27a28d32 JK |
509 | break; |
510 | case MAX77843_MUIC_CHG_SPECIAL_500MA: | |
309a3e00 KK |
511 | ret = max77843_muic_set_path(info, |
512 | MAX77843_MUIC_CONTROL1_SW_OPEN, | |
513 | attached); | |
27a28d32 JK |
514 | if (ret < 0) |
515 | return ret; | |
516 | ||
11eecf91 | 517 | extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_SLOW, |
2a9de9c0 | 518 | attached); |
27a28d32 JK |
519 | break; |
520 | case MAX77843_MUIC_CHG_SPECIAL_1A: | |
309a3e00 KK |
521 | ret = max77843_muic_set_path(info, |
522 | MAX77843_MUIC_CONTROL1_SW_OPEN, | |
523 | attached); | |
27a28d32 JK |
524 | if (ret < 0) |
525 | return ret; | |
526 | ||
11eecf91 | 527 | extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_FAST, |
2a9de9c0 | 528 | attached); |
27a28d32 JK |
529 | break; |
530 | case MAX77843_MUIC_CHG_GND: | |
531 | gnd_type = max77843_muic_get_cable_type(info, | |
532 | MAX77843_CABLE_GROUP_ADC_GND, &attached); | |
533 | ||
534 | /* Charger cable on MHL accessory is attach or detach */ | |
535 | if (gnd_type == MAX77843_MUIC_GND_MHL_VB) | |
11eecf91 CC |
536 | extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_DCP, |
537 | true); | |
27a28d32 | 538 | else if (gnd_type == MAX77843_MUIC_GND_MHL) |
11eecf91 CC |
539 | extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_DCP, |
540 | false); | |
27a28d32 JK |
541 | break; |
542 | case MAX77843_MUIC_CHG_NONE: | |
543 | break; | |
544 | default: | |
545 | dev_err(info->dev, | |
546 | "failed to detect %s accessory (chg_type:0x%x)\n", | |
547 | attached ? "attached" : "detached", chg_type); | |
548 | ||
309a3e00 KK |
549 | max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN, |
550 | attached); | |
27a28d32 JK |
551 | return -EINVAL; |
552 | } | |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
557 | static void max77843_muic_irq_work(struct work_struct *work) | |
558 | { | |
559 | struct max77843_muic_info *info = container_of(work, | |
560 | struct max77843_muic_info, irq_work); | |
bc1aadc1 | 561 | struct max77693_dev *max77843 = info->max77843; |
27a28d32 JK |
562 | int ret = 0; |
563 | ||
564 | mutex_lock(&info->mutex); | |
565 | ||
566 | ret = regmap_bulk_read(max77843->regmap_muic, | |
567 | MAX77843_MUIC_REG_STATUS1, info->status, | |
568 | MAX77843_MUIC_STATUS_NUM); | |
569 | if (ret) { | |
570 | dev_err(info->dev, "Cannot read STATUS registers\n"); | |
571 | mutex_unlock(&info->mutex); | |
572 | return; | |
573 | } | |
574 | ||
575 | if (info->irq_adc) { | |
576 | ret = max77843_muic_adc_handler(info); | |
577 | if (ret) | |
578 | dev_err(info->dev, "Unknown cable type\n"); | |
579 | info->irq_adc = false; | |
580 | } | |
581 | ||
582 | if (info->irq_chg) { | |
583 | ret = max77843_muic_chg_handler(info); | |
584 | if (ret) | |
585 | dev_err(info->dev, "Unknown charger type\n"); | |
586 | info->irq_chg = false; | |
587 | } | |
588 | ||
589 | mutex_unlock(&info->mutex); | |
590 | } | |
591 | ||
592 | static irqreturn_t max77843_muic_irq_handler(int irq, void *data) | |
593 | { | |
594 | struct max77843_muic_info *info = data; | |
595 | int i, irq_type = -1; | |
596 | ||
597 | for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) | |
598 | if (irq == max77843_muic_irqs[i].virq) | |
599 | irq_type = max77843_muic_irqs[i].irq; | |
600 | ||
601 | switch (irq_type) { | |
602 | case MAX77843_MUIC_IRQ_INT1_ADC: | |
603 | case MAX77843_MUIC_IRQ_INT1_ADCERROR: | |
604 | case MAX77843_MUIC_IRQ_INT1_ADC1K: | |
605 | info->irq_adc = true; | |
606 | break; | |
607 | case MAX77843_MUIC_IRQ_INT2_CHGTYP: | |
608 | case MAX77843_MUIC_IRQ_INT2_CHGDETRUN: | |
609 | case MAX77843_MUIC_IRQ_INT2_DCDTMR: | |
610 | case MAX77843_MUIC_IRQ_INT2_DXOVP: | |
611 | case MAX77843_MUIC_IRQ_INT2_VBVOLT: | |
612 | info->irq_chg = true; | |
613 | break; | |
614 | case MAX77843_MUIC_IRQ_INT3_VBADC: | |
615 | case MAX77843_MUIC_IRQ_INT3_VDNMON: | |
616 | case MAX77843_MUIC_IRQ_INT3_DNRES: | |
617 | case MAX77843_MUIC_IRQ_INT3_MPNACK: | |
618 | case MAX77843_MUIC_IRQ_INT3_MRXBUFOW: | |
619 | case MAX77843_MUIC_IRQ_INT3_MRXTRF: | |
620 | case MAX77843_MUIC_IRQ_INT3_MRXPERR: | |
621 | case MAX77843_MUIC_IRQ_INT3_MRXRDY: | |
622 | break; | |
623 | default: | |
624 | dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type); | |
625 | break; | |
626 | } | |
627 | ||
628 | schedule_work(&info->irq_work); | |
629 | ||
630 | return IRQ_HANDLED; | |
631 | } | |
632 | ||
633 | static void max77843_muic_detect_cable_wq(struct work_struct *work) | |
634 | { | |
635 | struct max77843_muic_info *info = container_of(to_delayed_work(work), | |
636 | struct max77843_muic_info, wq_detcable); | |
bc1aadc1 | 637 | struct max77693_dev *max77843 = info->max77843; |
27a28d32 JK |
638 | int chg_type, adc, ret; |
639 | bool attached; | |
640 | ||
641 | mutex_lock(&info->mutex); | |
642 | ||
643 | ret = regmap_bulk_read(max77843->regmap_muic, | |
644 | MAX77843_MUIC_REG_STATUS1, info->status, | |
645 | MAX77843_MUIC_STATUS_NUM); | |
646 | if (ret) { | |
647 | dev_err(info->dev, "Cannot read STATUS registers\n"); | |
648 | goto err_cable_wq; | |
649 | } | |
650 | ||
651 | adc = max77843_muic_get_cable_type(info, | |
652 | MAX77843_CABLE_GROUP_ADC, &attached); | |
653 | if (attached && adc != MAX77843_MUIC_ADC_OPEN) { | |
654 | ret = max77843_muic_adc_handler(info); | |
655 | if (ret < 0) { | |
656 | dev_err(info->dev, "Cannot detect accessory\n"); | |
657 | goto err_cable_wq; | |
658 | } | |
659 | } | |
660 | ||
661 | chg_type = max77843_muic_get_cable_type(info, | |
662 | MAX77843_CABLE_GROUP_CHG, &attached); | |
663 | if (attached && chg_type != MAX77843_MUIC_CHG_NONE) { | |
664 | ret = max77843_muic_chg_handler(info); | |
665 | if (ret < 0) { | |
666 | dev_err(info->dev, "Cannot detect charger accessory\n"); | |
667 | goto err_cable_wq; | |
668 | } | |
669 | } | |
670 | ||
671 | err_cable_wq: | |
672 | mutex_unlock(&info->mutex); | |
673 | } | |
674 | ||
675 | static int max77843_muic_set_debounce_time(struct max77843_muic_info *info, | |
676 | enum max77843_muic_adc_debounce_time time) | |
677 | { | |
bc1aadc1 | 678 | struct max77693_dev *max77843 = info->max77843; |
d927c590 | 679 | int ret; |
27a28d32 JK |
680 | |
681 | switch (time) { | |
682 | case MAX77843_DEBOUNCE_TIME_5MS: | |
683 | case MAX77843_DEBOUNCE_TIME_10MS: | |
684 | case MAX77843_DEBOUNCE_TIME_25MS: | |
685 | case MAX77843_DEBOUNCE_TIME_38_62MS: | |
686 | ret = regmap_update_bits(max77843->regmap_muic, | |
687 | MAX77843_MUIC_REG_CONTROL4, | |
688 | MAX77843_MUIC_CONTROL4_ADCDBSET_MASK, | |
309a3e00 | 689 | time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT); |
27a28d32 JK |
690 | if (ret < 0) { |
691 | dev_err(info->dev, "Cannot write MUIC regmap\n"); | |
692 | return ret; | |
693 | } | |
694 | break; | |
695 | default: | |
696 | dev_err(info->dev, "Invalid ADC debounce time\n"); | |
697 | return -EINVAL; | |
698 | } | |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
bc1aadc1 | 703 | static int max77843_init_muic_regmap(struct max77693_dev *max77843) |
27a28d32 JK |
704 | { |
705 | int ret; | |
706 | ||
707 | max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter, | |
708 | I2C_ADDR_MUIC); | |
709 | if (!max77843->i2c_muic) { | |
710 | dev_err(&max77843->i2c->dev, | |
711 | "Cannot allocate I2C device for MUIC\n"); | |
b9b518f5 | 712 | return -ENOMEM; |
27a28d32 JK |
713 | } |
714 | ||
715 | i2c_set_clientdata(max77843->i2c_muic, max77843); | |
716 | ||
717 | max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic, | |
718 | &max77843_muic_regmap_config); | |
719 | if (IS_ERR(max77843->regmap_muic)) { | |
720 | ret = PTR_ERR(max77843->regmap_muic); | |
721 | goto err_muic_i2c; | |
722 | } | |
723 | ||
724 | ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq, | |
725 | IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, | |
726 | 0, &max77843_muic_irq_chip, &max77843->irq_data_muic); | |
727 | if (ret < 0) { | |
728 | dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n"); | |
729 | goto err_muic_i2c; | |
730 | } | |
731 | ||
732 | return 0; | |
733 | ||
734 | err_muic_i2c: | |
735 | i2c_unregister_device(max77843->i2c_muic); | |
736 | ||
737 | return ret; | |
738 | } | |
739 | ||
740 | static int max77843_muic_probe(struct platform_device *pdev) | |
741 | { | |
bc1aadc1 | 742 | struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent); |
27a28d32 JK |
743 | struct max77843_muic_info *info; |
744 | unsigned int id; | |
745 | int i, ret; | |
746 | ||
747 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
748 | if (!info) | |
749 | return -ENOMEM; | |
750 | ||
751 | info->dev = &pdev->dev; | |
752 | info->max77843 = max77843; | |
753 | ||
754 | platform_set_drvdata(pdev, info); | |
755 | mutex_init(&info->mutex); | |
756 | ||
757 | /* Initialize i2c and regmap */ | |
758 | ret = max77843_init_muic_regmap(max77843); | |
759 | if (ret) { | |
760 | dev_err(&pdev->dev, "Failed to init MUIC regmap\n"); | |
761 | return ret; | |
762 | } | |
763 | ||
764 | /* Turn off auto detection configuration */ | |
765 | ret = regmap_update_bits(max77843->regmap_muic, | |
766 | MAX77843_MUIC_REG_CONTROL4, | |
767 | MAX77843_MUIC_CONTROL4_USBAUTO_MASK | | |
768 | MAX77843_MUIC_CONTROL4_FCTAUTO_MASK, | |
769 | CONTROL4_AUTO_DISABLE); | |
770 | ||
771 | /* Initialize extcon device */ | |
772 | info->edev = devm_extcon_dev_allocate(&pdev->dev, | |
773 | max77843_extcon_cable); | |
774 | if (IS_ERR(info->edev)) { | |
775 | dev_err(&pdev->dev, "Failed to allocate memory for extcon\n"); | |
776 | ret = -ENODEV; | |
777 | goto err_muic_irq; | |
778 | } | |
779 | ||
780 | ret = devm_extcon_dev_register(&pdev->dev, info->edev); | |
781 | if (ret) { | |
782 | dev_err(&pdev->dev, "Failed to register extcon device\n"); | |
783 | goto err_muic_irq; | |
784 | } | |
785 | ||
786 | /* Set ADC debounce time */ | |
787 | max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS); | |
788 | ||
789 | /* Set initial path for UART */ | |
309a3e00 | 790 | max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, true); |
27a28d32 JK |
791 | |
792 | /* Check revision number of MUIC device */ | |
793 | ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id); | |
794 | if (ret < 0) { | |
795 | dev_err(&pdev->dev, "Failed to read revision number\n"); | |
796 | goto err_muic_irq; | |
797 | } | |
798 | dev_info(info->dev, "MUIC device ID : 0x%x\n", id); | |
799 | ||
800 | /* Support virtual irq domain for max77843 MUIC device */ | |
801 | INIT_WORK(&info->irq_work, max77843_muic_irq_work); | |
802 | ||
135d9f7d JK |
803 | /* Clear IRQ bits before request IRQs */ |
804 | ret = regmap_bulk_read(max77843->regmap_muic, | |
805 | MAX77843_MUIC_REG_INT1, info->status, | |
806 | MAX77843_MUIC_IRQ_NUM); | |
807 | if (ret) { | |
808 | dev_err(&pdev->dev, "Failed to Clear IRQ bits\n"); | |
809 | goto err_muic_irq; | |
810 | } | |
811 | ||
27a28d32 JK |
812 | for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) { |
813 | struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i]; | |
c05c0d54 | 814 | int virq = 0; |
27a28d32 JK |
815 | |
816 | virq = regmap_irq_get_virq(max77843->irq_data_muic, | |
817 | muic_irq->irq); | |
818 | if (virq <= 0) { | |
819 | ret = -EINVAL; | |
820 | goto err_muic_irq; | |
821 | } | |
822 | muic_irq->virq = virq; | |
823 | ||
824 | ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, | |
825 | max77843_muic_irq_handler, IRQF_NO_SUSPEND, | |
826 | muic_irq->name, info); | |
827 | if (ret) { | |
828 | dev_err(&pdev->dev, | |
829 | "Failed to request irq (IRQ: %d, error: %d)\n", | |
830 | muic_irq->irq, ret); | |
831 | goto err_muic_irq; | |
832 | } | |
833 | } | |
834 | ||
835 | /* Detect accessory after completing the initialization of platform */ | |
836 | INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq); | |
837 | queue_delayed_work(system_power_efficient_wq, | |
838 | &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT)); | |
839 | ||
840 | return 0; | |
841 | ||
842 | err_muic_irq: | |
843 | regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); | |
844 | i2c_unregister_device(max77843->i2c_muic); | |
845 | ||
846 | return ret; | |
847 | } | |
848 | ||
849 | static int max77843_muic_remove(struct platform_device *pdev) | |
850 | { | |
851 | struct max77843_muic_info *info = platform_get_drvdata(pdev); | |
bc1aadc1 | 852 | struct max77693_dev *max77843 = info->max77843; |
27a28d32 JK |
853 | |
854 | cancel_work_sync(&info->irq_work); | |
855 | regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); | |
856 | i2c_unregister_device(max77843->i2c_muic); | |
857 | ||
858 | return 0; | |
859 | } | |
860 | ||
861 | static const struct platform_device_id max77843_muic_id[] = { | |
862 | { "max77843-muic", }, | |
863 | { /* sentinel */ }, | |
864 | }; | |
865 | MODULE_DEVICE_TABLE(platform, max77843_muic_id); | |
866 | ||
867 | static struct platform_driver max77843_muic_driver = { | |
868 | .driver = { | |
869 | .name = "max77843-muic", | |
870 | }, | |
871 | .probe = max77843_muic_probe, | |
872 | .remove = max77843_muic_remove, | |
873 | .id_table = max77843_muic_id, | |
874 | }; | |
875 | ||
876 | static int __init max77843_muic_init(void) | |
877 | { | |
878 | return platform_driver_register(&max77843_muic_driver); | |
879 | } | |
880 | subsys_initcall(max77843_muic_init); | |
881 | ||
882 | MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver"); | |
883 | MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); | |
884 | MODULE_LICENSE("GPL"); |