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962e56bf | 1 | /* |
4706a525 | 2 | * extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC |
962e56bf | 3 | * |
6ab0b117 | 4 | * Copyright (C) 2013,2014 Samsung Electronics |
962e56bf | 5 | * Chanwoo Choi <cw00.choi@samsung.com> |
4706a525 | 6 | * Krzysztof Kozlowski <k.kozlowski@samsung.com> |
962e56bf CC |
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 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | */ | |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/i2c.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/mfd/max14577.h> | |
25 | #include <linux/mfd/max14577-private.h> | |
26 | #include <linux/extcon.h> | |
27 | ||
962e56bf CC |
28 | #define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ |
29 | ||
30 | enum max14577_muic_adc_debounce_time { | |
31 | ADC_DEBOUNCE_TIME_5MS = 0, | |
32 | ADC_DEBOUNCE_TIME_10MS, | |
33 | ADC_DEBOUNCE_TIME_25MS, | |
34 | ADC_DEBOUNCE_TIME_38_62MS, | |
35 | }; | |
36 | ||
37 | enum max14577_muic_status { | |
38 | MAX14577_MUIC_STATUS1 = 0, | |
39 | MAX14577_MUIC_STATUS2 = 1, | |
40 | MAX14577_MUIC_STATUS_END, | |
41 | }; | |
42 | ||
0ca852b7 KK |
43 | /** |
44 | * struct max14577_muic_irq | |
45 | * @irq: the index of irq list of MUIC device. | |
46 | * @name: the name of irq. | |
47 | * @virq: the virtual irq to use irq domain | |
48 | */ | |
49 | struct max14577_muic_irq { | |
50 | unsigned int irq; | |
51 | const char *name; | |
52 | unsigned int virq; | |
53 | }; | |
54 | ||
55 | static struct max14577_muic_irq max14577_muic_irqs[] = { | |
56 | { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, | |
57 | { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, | |
58 | { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, | |
59 | { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, | |
60 | { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, | |
61 | { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, | |
62 | { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, | |
63 | { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, | |
64 | }; | |
65 | ||
4706a525 KK |
66 | static struct max14577_muic_irq max77836_muic_irqs[] = { |
67 | { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, | |
68 | { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, | |
69 | { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, | |
70 | { MAX77836_IRQ_INT1_ADC1K, "muic-ADC1K" }, | |
71 | { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, | |
72 | { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, | |
73 | { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, | |
74 | { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, | |
75 | { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, | |
76 | { MAX77836_IRQ_INT2_VIDRM, "muic-VIDRM" }, | |
77 | }; | |
78 | ||
962e56bf CC |
79 | struct max14577_muic_info { |
80 | struct device *dev; | |
81 | struct max14577 *max14577; | |
82 | struct extcon_dev *edev; | |
83 | int prev_cable_type; | |
84 | int prev_chg_type; | |
85 | u8 status[MAX14577_MUIC_STATUS_END]; | |
86 | ||
0ca852b7 KK |
87 | struct max14577_muic_irq *muic_irqs; |
88 | unsigned int muic_irqs_num; | |
962e56bf CC |
89 | bool irq_adc; |
90 | bool irq_chg; | |
91 | struct work_struct irq_work; | |
92 | struct mutex mutex; | |
93 | ||
94 | /* | |
95 | * Use delayed workqueue to detect cable state and then | |
96 | * notify cable state to notifiee/platform through uevent. | |
97 | * After completing the booting of platform, the extcon provider | |
98 | * driver should notify cable state to upper layer. | |
99 | */ | |
100 | struct delayed_work wq_detcable; | |
101 | ||
102 | /* | |
103 | * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB | |
104 | * h/w path of COMP2/COMN1 on CONTROL1 register. | |
105 | */ | |
106 | int path_usb; | |
107 | int path_uart; | |
108 | }; | |
109 | ||
110 | enum max14577_muic_cable_group { | |
111 | MAX14577_CABLE_GROUP_ADC = 0, | |
112 | MAX14577_CABLE_GROUP_CHG, | |
113 | }; | |
114 | ||
962e56bf CC |
115 | /* Define supported accessory type */ |
116 | enum max14577_muic_acc_type { | |
117 | MAX14577_MUIC_ADC_GROUND = 0x0, | |
118 | MAX14577_MUIC_ADC_SEND_END_BUTTON, | |
119 | MAX14577_MUIC_ADC_REMOTE_S1_BUTTON, | |
120 | MAX14577_MUIC_ADC_REMOTE_S2_BUTTON, | |
121 | MAX14577_MUIC_ADC_REMOTE_S3_BUTTON, | |
122 | MAX14577_MUIC_ADC_REMOTE_S4_BUTTON, | |
123 | MAX14577_MUIC_ADC_REMOTE_S5_BUTTON, | |
124 | MAX14577_MUIC_ADC_REMOTE_S6_BUTTON, | |
125 | MAX14577_MUIC_ADC_REMOTE_S7_BUTTON, | |
126 | MAX14577_MUIC_ADC_REMOTE_S8_BUTTON, | |
127 | MAX14577_MUIC_ADC_REMOTE_S9_BUTTON, | |
128 | MAX14577_MUIC_ADC_REMOTE_S10_BUTTON, | |
129 | MAX14577_MUIC_ADC_REMOTE_S11_BUTTON, | |
130 | MAX14577_MUIC_ADC_REMOTE_S12_BUTTON, | |
131 | MAX14577_MUIC_ADC_RESERVED_ACC_1, | |
132 | MAX14577_MUIC_ADC_RESERVED_ACC_2, | |
133 | MAX14577_MUIC_ADC_RESERVED_ACC_3, | |
134 | MAX14577_MUIC_ADC_RESERVED_ACC_4, | |
135 | MAX14577_MUIC_ADC_RESERVED_ACC_5, | |
136 | MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2, | |
137 | MAX14577_MUIC_ADC_PHONE_POWERED_DEV, | |
138 | MAX14577_MUIC_ADC_TTY_CONVERTER, | |
139 | MAX14577_MUIC_ADC_UART_CABLE, | |
140 | MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG, | |
141 | MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF, | |
142 | MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON, | |
143 | MAX14577_MUIC_ADC_AV_CABLE_NOLOAD, | |
144 | MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG, | |
145 | MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF, | |
146 | MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON, | |
147 | MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */ | |
148 | MAX14577_MUIC_ADC_OPEN, | |
149 | }; | |
150 | ||
73b6ecdb | 151 | static const unsigned int max14577_extcon_cable[] = { |
2a9de9c0 CC |
152 | EXTCON_USB, |
153 | EXTCON_TA, | |
154 | EXTCON_FAST_CHARGER, | |
155 | EXTCON_SLOW_CHARGER, | |
156 | EXTCON_CHARGE_DOWNSTREAM, | |
157 | EXTCON_JIG, | |
158 | EXTCON_NONE, | |
962e56bf CC |
159 | }; |
160 | ||
161 | /* | |
162 | * max14577_muic_set_debounce_time - Set the debounce time of ADC | |
163 | * @info: the instance including private data of max14577 MUIC | |
164 | * @time: the debounce time of ADC | |
165 | */ | |
166 | static int max14577_muic_set_debounce_time(struct max14577_muic_info *info, | |
167 | enum max14577_muic_adc_debounce_time time) | |
168 | { | |
169 | u8 ret; | |
170 | ||
171 | switch (time) { | |
172 | case ADC_DEBOUNCE_TIME_5MS: | |
173 | case ADC_DEBOUNCE_TIME_10MS: | |
174 | case ADC_DEBOUNCE_TIME_25MS: | |
175 | case ADC_DEBOUNCE_TIME_38_62MS: | |
176 | ret = max14577_update_reg(info->max14577->regmap, | |
177 | MAX14577_MUIC_REG_CONTROL3, | |
178 | CTRL3_ADCDBSET_MASK, | |
179 | time << CTRL3_ADCDBSET_SHIFT); | |
180 | if (ret) { | |
181 | dev_err(info->dev, "failed to set ADC debounce time\n"); | |
182 | return ret; | |
183 | } | |
184 | break; | |
185 | default: | |
186 | dev_err(info->dev, "invalid ADC debounce time\n"); | |
187 | return -EINVAL; | |
188 | } | |
189 | ||
190 | return 0; | |
191 | }; | |
192 | ||
193 | /* | |
194 | * max14577_muic_set_path - Set hardware line according to attached cable | |
195 | * @info: the instance including private data of max14577 MUIC | |
196 | * @value: the path according to attached cable | |
197 | * @attached: the state of cable (true:attached, false:detached) | |
198 | * | |
199 | * The max14577 MUIC device share outside H/W line among a varity of cables | |
200 | * so, this function set internal path of H/W line according to the type of | |
201 | * attached cable. | |
202 | */ | |
203 | static int max14577_muic_set_path(struct max14577_muic_info *info, | |
204 | u8 val, bool attached) | |
205 | { | |
206 | int ret = 0; | |
207 | u8 ctrl1, ctrl2 = 0; | |
208 | ||
209 | /* Set open state to path before changing hw path */ | |
210 | ret = max14577_update_reg(info->max14577->regmap, | |
211 | MAX14577_MUIC_REG_CONTROL1, | |
212 | CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN); | |
213 | if (ret < 0) { | |
214 | dev_err(info->dev, "failed to update MUIC register\n"); | |
215 | return ret; | |
216 | } | |
217 | ||
218 | if (attached) | |
219 | ctrl1 = val; | |
220 | else | |
221 | ctrl1 = CTRL1_SW_OPEN; | |
222 | ||
223 | ret = max14577_update_reg(info->max14577->regmap, | |
224 | MAX14577_MUIC_REG_CONTROL1, | |
225 | CLEAR_IDBEN_MICEN_MASK, ctrl1); | |
226 | if (ret < 0) { | |
227 | dev_err(info->dev, "failed to update MUIC register\n"); | |
228 | return ret; | |
229 | } | |
230 | ||
231 | if (attached) | |
232 | ctrl2 |= CTRL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ | |
233 | else | |
234 | ctrl2 |= CTRL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ | |
235 | ||
236 | ret = max14577_update_reg(info->max14577->regmap, | |
237 | MAX14577_REG_CONTROL2, | |
238 | CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2); | |
239 | if (ret < 0) { | |
240 | dev_err(info->dev, "failed to update MUIC register\n"); | |
241 | return ret; | |
242 | } | |
243 | ||
244 | dev_dbg(info->dev, | |
245 | "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", | |
246 | ctrl1, ctrl2, attached ? "attached" : "detached"); | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | /* | |
252 | * max14577_muic_get_cable_type - Return cable type and check cable state | |
253 | * @info: the instance including private data of max14577 MUIC | |
254 | * @group: the path according to attached cable | |
255 | * @attached: store cable state and return | |
256 | * | |
257 | * This function check the cable state either attached or detached, | |
258 | * and then divide precise type of cable according to cable group. | |
259 | * - max14577_CABLE_GROUP_ADC | |
260 | * - max14577_CABLE_GROUP_CHG | |
261 | */ | |
262 | static int max14577_muic_get_cable_type(struct max14577_muic_info *info, | |
263 | enum max14577_muic_cable_group group, bool *attached) | |
264 | { | |
265 | int cable_type = 0; | |
266 | int adc; | |
267 | int chg_type; | |
268 | ||
269 | switch (group) { | |
270 | case MAX14577_CABLE_GROUP_ADC: | |
271 | /* | |
272 | * Read ADC value to check cable type and decide cable state | |
273 | * according to cable type | |
274 | */ | |
275 | adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK; | |
276 | adc >>= STATUS1_ADC_SHIFT; | |
277 | ||
278 | /* | |
279 | * Check current cable state/cable type and store cable type | |
280 | * (info->prev_cable_type) for handling cable when cable is | |
281 | * detached. | |
282 | */ | |
283 | if (adc == MAX14577_MUIC_ADC_OPEN) { | |
284 | *attached = false; | |
285 | ||
286 | cable_type = info->prev_cable_type; | |
287 | info->prev_cable_type = MAX14577_MUIC_ADC_OPEN; | |
288 | } else { | |
289 | *attached = true; | |
290 | ||
291 | cable_type = info->prev_cable_type = adc; | |
292 | } | |
293 | break; | |
294 | case MAX14577_CABLE_GROUP_CHG: | |
295 | /* | |
296 | * Read charger type to check cable type and decide cable state | |
297 | * according to type of charger cable. | |
298 | */ | |
299 | chg_type = info->status[MAX14577_MUIC_STATUS2] & | |
300 | STATUS2_CHGTYP_MASK; | |
301 | chg_type >>= STATUS2_CHGTYP_SHIFT; | |
302 | ||
303 | if (chg_type == MAX14577_CHARGER_TYPE_NONE) { | |
304 | *attached = false; | |
305 | ||
306 | cable_type = info->prev_chg_type; | |
307 | info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE; | |
308 | } else { | |
309 | *attached = true; | |
310 | ||
311 | /* | |
312 | * Check current cable state/cable type and store cable | |
313 | * type(info->prev_chg_type) for handling cable when | |
314 | * charger cable is detached. | |
315 | */ | |
316 | cable_type = info->prev_chg_type = chg_type; | |
317 | } | |
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 max14577_muic_jig_handler(struct max14577_muic_info *info, | |
330 | int cable_type, bool attached) | |
331 | { | |
962e56bf CC |
332 | int ret = 0; |
333 | u8 path = CTRL1_SW_OPEN; | |
334 | ||
335 | dev_dbg(info->dev, | |
336 | "external connector is %s (adc:0x%02x)\n", | |
337 | attached ? "attached" : "detached", cable_type); | |
338 | ||
339 | switch (cable_type) { | |
340 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */ | |
962e56bf CC |
341 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */ |
342 | /* PATH:AP_USB */ | |
962e56bf CC |
343 | path = CTRL1_SW_USB; |
344 | break; | |
345 | case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */ | |
346 | /* PATH:AP_UART */ | |
962e56bf CC |
347 | path = CTRL1_SW_UART; |
348 | break; | |
349 | default: | |
350 | dev_err(info->dev, "failed to detect %s jig cable\n", | |
351 | attached ? "attached" : "detached"); | |
352 | return -EINVAL; | |
353 | } | |
354 | ||
355 | ret = max14577_muic_set_path(info, path, attached); | |
356 | if (ret < 0) | |
357 | return ret; | |
358 | ||
2a9de9c0 | 359 | extcon_set_cable_state_(info->edev, EXTCON_JIG, attached); |
962e56bf CC |
360 | |
361 | return 0; | |
362 | } | |
363 | ||
364 | static int max14577_muic_adc_handler(struct max14577_muic_info *info) | |
365 | { | |
366 | int cable_type; | |
367 | bool attached; | |
368 | int ret = 0; | |
369 | ||
370 | /* Check accessory state which is either detached or attached */ | |
371 | cable_type = max14577_muic_get_cable_type(info, | |
372 | MAX14577_CABLE_GROUP_ADC, &attached); | |
373 | ||
374 | dev_dbg(info->dev, | |
375 | "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", | |
376 | attached ? "attached" : "detached", cable_type, | |
377 | info->prev_cable_type); | |
378 | ||
379 | switch (cable_type) { | |
380 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
381 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: | |
382 | case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
383 | /* JIG */ | |
384 | ret = max14577_muic_jig_handler(info, cable_type, attached); | |
385 | if (ret < 0) | |
386 | return ret; | |
387 | break; | |
388 | case MAX14577_MUIC_ADC_GROUND: | |
389 | case MAX14577_MUIC_ADC_SEND_END_BUTTON: | |
390 | case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON: | |
391 | case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON: | |
392 | case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON: | |
393 | case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON: | |
394 | case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON: | |
395 | case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON: | |
396 | case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON: | |
397 | case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON: | |
398 | case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON: | |
399 | case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON: | |
400 | case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON: | |
401 | case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON: | |
402 | case MAX14577_MUIC_ADC_RESERVED_ACC_1: | |
403 | case MAX14577_MUIC_ADC_RESERVED_ACC_2: | |
404 | case MAX14577_MUIC_ADC_RESERVED_ACC_3: | |
405 | case MAX14577_MUIC_ADC_RESERVED_ACC_4: | |
406 | case MAX14577_MUIC_ADC_RESERVED_ACC_5: | |
407 | case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2: | |
408 | case MAX14577_MUIC_ADC_PHONE_POWERED_DEV: | |
409 | case MAX14577_MUIC_ADC_TTY_CONVERTER: | |
410 | case MAX14577_MUIC_ADC_UART_CABLE: | |
411 | case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG: | |
412 | case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD: | |
413 | case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG: | |
414 | case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON: | |
415 | case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1: | |
416 | /* | |
417 | * This accessory isn't used in general case if it is specially | |
418 | * needed to detect additional accessory, should implement | |
419 | * proper operation when this accessory is attached/detached. | |
420 | */ | |
421 | dev_info(info->dev, | |
422 | "accessory is %s but it isn't used (adc:0x%x)\n", | |
423 | attached ? "attached" : "detached", cable_type); | |
424 | return -EAGAIN; | |
425 | default: | |
426 | dev_err(info->dev, | |
427 | "failed to detect %s accessory (adc:0x%x)\n", | |
428 | attached ? "attached" : "detached", cable_type); | |
429 | return -EINVAL; | |
430 | } | |
431 | ||
432 | return 0; | |
433 | } | |
434 | ||
435 | static int max14577_muic_chg_handler(struct max14577_muic_info *info) | |
436 | { | |
437 | int chg_type; | |
438 | bool attached; | |
439 | int ret = 0; | |
440 | ||
441 | chg_type = max14577_muic_get_cable_type(info, | |
442 | MAX14577_CABLE_GROUP_CHG, &attached); | |
443 | ||
444 | dev_dbg(info->dev, | |
445 | "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", | |
446 | attached ? "attached" : "detached", | |
447 | chg_type, info->prev_chg_type); | |
448 | ||
449 | switch (chg_type) { | |
450 | case MAX14577_CHARGER_TYPE_USB: | |
451 | /* PATH:AP_USB */ | |
452 | ret = max14577_muic_set_path(info, info->path_usb, attached); | |
453 | if (ret < 0) | |
454 | return ret; | |
455 | ||
2a9de9c0 | 456 | extcon_set_cable_state_(info->edev, EXTCON_USB, attached); |
962e56bf CC |
457 | break; |
458 | case MAX14577_CHARGER_TYPE_DEDICATED_CHG: | |
2a9de9c0 | 459 | extcon_set_cable_state_(info->edev, EXTCON_TA, attached); |
962e56bf CC |
460 | break; |
461 | case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT: | |
2a9de9c0 CC |
462 | extcon_set_cable_state_(info->edev, EXTCON_CHARGE_DOWNSTREAM, |
463 | attached); | |
962e56bf CC |
464 | break; |
465 | case MAX14577_CHARGER_TYPE_SPECIAL_500MA: | |
2a9de9c0 CC |
466 | extcon_set_cable_state_(info->edev, EXTCON_SLOW_CHARGER, |
467 | attached); | |
962e56bf CC |
468 | break; |
469 | case MAX14577_CHARGER_TYPE_SPECIAL_1A: | |
2a9de9c0 CC |
470 | extcon_set_cable_state_(info->edev, EXTCON_FAST_CHARGER, |
471 | attached); | |
962e56bf CC |
472 | break; |
473 | case MAX14577_CHARGER_TYPE_NONE: | |
474 | case MAX14577_CHARGER_TYPE_DEAD_BATTERY: | |
475 | break; | |
476 | default: | |
477 | dev_err(info->dev, | |
478 | "failed to detect %s accessory (chg_type:0x%x)\n", | |
479 | attached ? "attached" : "detached", chg_type); | |
480 | return -EINVAL; | |
481 | } | |
482 | ||
483 | return 0; | |
484 | } | |
485 | ||
486 | static void max14577_muic_irq_work(struct work_struct *work) | |
487 | { | |
488 | struct max14577_muic_info *info = container_of(work, | |
489 | struct max14577_muic_info, irq_work); | |
490 | int ret = 0; | |
491 | ||
492 | if (!info->edev) | |
493 | return; | |
494 | ||
495 | mutex_lock(&info->mutex); | |
496 | ||
497 | ret = max14577_bulk_read(info->max14577->regmap, | |
498 | MAX14577_MUIC_REG_STATUS1, info->status, 2); | |
499 | if (ret) { | |
500 | dev_err(info->dev, "failed to read MUIC register\n"); | |
501 | mutex_unlock(&info->mutex); | |
502 | return; | |
503 | } | |
504 | ||
505 | if (info->irq_adc) { | |
506 | ret = max14577_muic_adc_handler(info); | |
507 | info->irq_adc = false; | |
508 | } | |
509 | if (info->irq_chg) { | |
510 | ret = max14577_muic_chg_handler(info); | |
511 | info->irq_chg = false; | |
512 | } | |
513 | ||
514 | if (ret < 0) | |
515 | dev_err(info->dev, "failed to handle MUIC interrupt\n"); | |
516 | ||
517 | mutex_unlock(&info->mutex); | |
962e56bf CC |
518 | } |
519 | ||
4706a525 KK |
520 | /* |
521 | * Sets irq_adc or irq_chg in max14577_muic_info and returns 1. | |
522 | * Returns 0 if irq_type does not match registered IRQ for this device type. | |
523 | */ | |
524 | static int max14577_parse_irq(struct max14577_muic_info *info, int irq_type) | |
962e56bf | 525 | { |
962e56bf CC |
526 | switch (irq_type) { |
527 | case MAX14577_IRQ_INT1_ADC: | |
528 | case MAX14577_IRQ_INT1_ADCLOW: | |
529 | case MAX14577_IRQ_INT1_ADCERR: | |
530 | /* Handle all of accessory except for | |
531 | type of charger accessory */ | |
532 | info->irq_adc = true; | |
4706a525 | 533 | return 1; |
962e56bf CC |
534 | case MAX14577_IRQ_INT2_CHGTYP: |
535 | case MAX14577_IRQ_INT2_CHGDETRUN: | |
536 | case MAX14577_IRQ_INT2_DCDTMR: | |
537 | case MAX14577_IRQ_INT2_DBCHG: | |
538 | case MAX14577_IRQ_INT2_VBVOLT: | |
539 | /* Handle charger accessory */ | |
540 | info->irq_chg = true; | |
4706a525 KK |
541 | return 1; |
542 | default: | |
543 | return 0; | |
544 | } | |
545 | } | |
546 | ||
547 | /* | |
548 | * Sets irq_adc or irq_chg in max14577_muic_info and returns 1. | |
549 | * Returns 0 if irq_type does not match registered IRQ for this device type. | |
550 | */ | |
551 | static int max77836_parse_irq(struct max14577_muic_info *info, int irq_type) | |
552 | { | |
553 | /* First check common max14577 interrupts */ | |
554 | if (max14577_parse_irq(info, irq_type)) | |
555 | return 1; | |
556 | ||
557 | switch (irq_type) { | |
558 | case MAX77836_IRQ_INT1_ADC1K: | |
559 | info->irq_adc = true; | |
560 | return 1; | |
561 | case MAX77836_IRQ_INT2_VIDRM: | |
562 | /* Handle charger accessory */ | |
563 | info->irq_chg = true; | |
564 | return 1; | |
565 | default: | |
566 | return 0; | |
567 | } | |
568 | } | |
569 | ||
570 | static irqreturn_t max14577_muic_irq_handler(int irq, void *data) | |
571 | { | |
572 | struct max14577_muic_info *info = data; | |
573 | int i, irq_type = -1; | |
574 | bool irq_parsed; | |
575 | ||
576 | /* | |
577 | * We may be called multiple times for different nested IRQ-s. | |
578 | * Including changes in INT1_ADC and INT2_CGHTYP at once. | |
579 | * However we only need to know whether it was ADC, charger | |
580 | * or both interrupts so decode IRQ and turn on proper flags. | |
581 | */ | |
582 | for (i = 0; i < info->muic_irqs_num; i++) | |
583 | if (irq == info->muic_irqs[i].virq) | |
584 | irq_type = info->muic_irqs[i].irq; | |
585 | ||
586 | switch (info->max14577->dev_type) { | |
587 | case MAXIM_DEVICE_TYPE_MAX77836: | |
588 | irq_parsed = max77836_parse_irq(info, irq_type); | |
962e56bf | 589 | break; |
4706a525 | 590 | case MAXIM_DEVICE_TYPE_MAX14577: |
962e56bf | 591 | default: |
4706a525 KK |
592 | irq_parsed = max14577_parse_irq(info, irq_type); |
593 | break; | |
594 | } | |
595 | ||
596 | if (!irq_parsed) { | |
962e56bf CC |
597 | dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n", |
598 | irq_type); | |
599 | return IRQ_HANDLED; | |
600 | } | |
601 | schedule_work(&info->irq_work); | |
602 | ||
603 | return IRQ_HANDLED; | |
604 | } | |
605 | ||
606 | static int max14577_muic_detect_accessory(struct max14577_muic_info *info) | |
607 | { | |
608 | int ret = 0; | |
609 | int adc; | |
610 | int chg_type; | |
611 | bool attached; | |
612 | ||
613 | mutex_lock(&info->mutex); | |
614 | ||
615 | /* Read STATUSx register to detect accessory */ | |
616 | ret = max14577_bulk_read(info->max14577->regmap, | |
617 | MAX14577_MUIC_REG_STATUS1, info->status, 2); | |
618 | if (ret) { | |
619 | dev_err(info->dev, "failed to read MUIC register\n"); | |
620 | mutex_unlock(&info->mutex); | |
621 | return ret; | |
622 | } | |
623 | ||
624 | adc = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC, | |
625 | &attached); | |
626 | if (attached && adc != MAX14577_MUIC_ADC_OPEN) { | |
627 | ret = max14577_muic_adc_handler(info); | |
628 | if (ret < 0) { | |
629 | dev_err(info->dev, "Cannot detect accessory\n"); | |
630 | mutex_unlock(&info->mutex); | |
631 | return ret; | |
632 | } | |
633 | } | |
634 | ||
635 | chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG, | |
636 | &attached); | |
637 | if (attached && chg_type != MAX14577_CHARGER_TYPE_NONE) { | |
638 | ret = max14577_muic_chg_handler(info); | |
639 | if (ret < 0) { | |
640 | dev_err(info->dev, "Cannot detect charger accessory\n"); | |
641 | mutex_unlock(&info->mutex); | |
642 | return ret; | |
643 | } | |
644 | } | |
645 | ||
646 | mutex_unlock(&info->mutex); | |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
651 | static void max14577_muic_detect_cable_wq(struct work_struct *work) | |
652 | { | |
653 | struct max14577_muic_info *info = container_of(to_delayed_work(work), | |
654 | struct max14577_muic_info, wq_detcable); | |
655 | ||
656 | max14577_muic_detect_accessory(info); | |
657 | } | |
658 | ||
659 | static int max14577_muic_probe(struct platform_device *pdev) | |
660 | { | |
661 | struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent); | |
662 | struct max14577_muic_info *info; | |
663 | int delay_jiffies; | |
664 | int ret; | |
665 | int i; | |
666 | u8 id; | |
667 | ||
668 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
0a16ee63 | 669 | if (!info) |
962e56bf | 670 | return -ENOMEM; |
0a16ee63 | 671 | |
962e56bf CC |
672 | info->dev = &pdev->dev; |
673 | info->max14577 = max14577; | |
674 | ||
675 | platform_set_drvdata(pdev, info); | |
676 | mutex_init(&info->mutex); | |
677 | ||
678 | INIT_WORK(&info->irq_work, max14577_muic_irq_work); | |
679 | ||
0ca852b7 | 680 | switch (max14577->dev_type) { |
4706a525 KK |
681 | case MAXIM_DEVICE_TYPE_MAX77836: |
682 | info->muic_irqs = max77836_muic_irqs; | |
683 | info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs); | |
684 | break; | |
0ca852b7 KK |
685 | case MAXIM_DEVICE_TYPE_MAX14577: |
686 | default: | |
687 | info->muic_irqs = max14577_muic_irqs; | |
688 | info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs); | |
689 | } | |
690 | ||
962e56bf | 691 | /* Support irq domain for max14577 MUIC device */ |
0ca852b7 KK |
692 | for (i = 0; i < info->muic_irqs_num; i++) { |
693 | struct max14577_muic_irq *muic_irq = &info->muic_irqs[i]; | |
962e56bf CC |
694 | unsigned int virq = 0; |
695 | ||
696 | virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq); | |
369afd4b | 697 | if (virq <= 0) |
962e56bf CC |
698 | return -EINVAL; |
699 | muic_irq->virq = virq; | |
700 | ||
701 | ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, | |
702 | max14577_muic_irq_handler, | |
703 | IRQF_NO_SUSPEND, | |
704 | muic_irq->name, info); | |
705 | if (ret) { | |
706 | dev_err(&pdev->dev, | |
34825e51 | 707 | "failed: irq request (IRQ: %d, error :%d)\n", |
962e56bf CC |
708 | muic_irq->irq, ret); |
709 | return ret; | |
710 | } | |
711 | } | |
712 | ||
713 | /* Initialize extcon device */ | |
0604002c CC |
714 | info->edev = devm_extcon_dev_allocate(&pdev->dev, |
715 | max14577_extcon_cable); | |
716 | if (IS_ERR(info->edev)) { | |
962e56bf CC |
717 | dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); |
718 | return -ENOMEM; | |
719 | } | |
4005da5c | 720 | |
14dbd549 | 721 | ret = devm_extcon_dev_register(&pdev->dev, info->edev); |
962e56bf CC |
722 | if (ret) { |
723 | dev_err(&pdev->dev, "failed to register extcon device\n"); | |
724 | return ret; | |
725 | } | |
726 | ||
727 | /* Default h/w line path */ | |
728 | info->path_usb = CTRL1_SW_USB; | |
729 | info->path_uart = CTRL1_SW_UART; | |
730 | delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); | |
731 | ||
732 | /* Set initial path for UART */ | |
733 | max14577_muic_set_path(info, info->path_uart, true); | |
734 | ||
735 | /* Check revision number of MUIC device*/ | |
736 | ret = max14577_read_reg(info->max14577->regmap, | |
737 | MAX14577_REG_DEVICEID, &id); | |
738 | if (ret < 0) { | |
739 | dev_err(&pdev->dev, "failed to read revision number\n"); | |
14dbd549 | 740 | return ret; |
962e56bf CC |
741 | } |
742 | dev_info(info->dev, "device ID : 0x%x\n", id); | |
743 | ||
744 | /* Set ADC debounce time */ | |
745 | max14577_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); | |
746 | ||
747 | /* | |
748 | * Detect accessory after completing the initialization of platform | |
749 | * | |
750 | * - Use delayed workqueue to detect cable state and then | |
751 | * notify cable state to notifiee/platform through uevent. | |
752 | * After completing the booting of platform, the extcon provider | |
753 | * driver should notify cable state to upper layer. | |
754 | */ | |
755 | INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq); | |
12adef5b | 756 | queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, |
962e56bf | 757 | delay_jiffies); |
962e56bf CC |
758 | |
759 | return ret; | |
962e56bf CC |
760 | } |
761 | ||
762 | static int max14577_muic_remove(struct platform_device *pdev) | |
763 | { | |
764 | struct max14577_muic_info *info = platform_get_drvdata(pdev); | |
765 | ||
766 | cancel_work_sync(&info->irq_work); | |
962e56bf CC |
767 | |
768 | return 0; | |
769 | } | |
770 | ||
4706a525 KK |
771 | static const struct platform_device_id max14577_muic_id[] = { |
772 | { "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, }, | |
773 | { "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, }, | |
774 | { } | |
775 | }; | |
776 | MODULE_DEVICE_TABLE(platform, max14577_muic_id); | |
777 | ||
962e56bf CC |
778 | static struct platform_driver max14577_muic_driver = { |
779 | .driver = { | |
4005da5c | 780 | .name = "max14577-muic", |
962e56bf CC |
781 | }, |
782 | .probe = max14577_muic_probe, | |
783 | .remove = max14577_muic_remove, | |
4706a525 | 784 | .id_table = max14577_muic_id, |
962e56bf CC |
785 | }; |
786 | ||
787 | module_platform_driver(max14577_muic_driver); | |
788 | ||
4706a525 KK |
789 | MODULE_DESCRIPTION("Maxim 14577/77836 Extcon driver"); |
790 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <k.kozlowski@samsung.com>"); | |
962e56bf CC |
791 | MODULE_LICENSE("GPL"); |
792 | MODULE_ALIAS("platform:extcon-max14577"); |