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1213a366 KK |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // | |
3 | // extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC | |
4 | // | |
5 | // Copyright (C) 2013,2014 Samsung Electronics | |
6 | // Chanwoo Choi <cw00.choi@samsung.com> | |
7 | // Krzysztof Kozlowski <krzk@kernel.org> | |
962e56bf | 8 | |
14ad7682 | 9 | #include <linux/devm-helpers.h> |
962e56bf CC |
10 | #include <linux/kernel.h> |
11 | #include <linux/module.h> | |
12 | #include <linux/i2c.h> | |
13 | #include <linux/interrupt.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/mfd/max14577.h> | |
16 | #include <linux/mfd/max14577-private.h> | |
176aa360 | 17 | #include <linux/extcon-provider.h> |
962e56bf | 18 | |
962e56bf CC |
19 | #define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ |
20 | ||
21 | enum max14577_muic_adc_debounce_time { | |
22 | ADC_DEBOUNCE_TIME_5MS = 0, | |
23 | ADC_DEBOUNCE_TIME_10MS, | |
24 | ADC_DEBOUNCE_TIME_25MS, | |
25 | ADC_DEBOUNCE_TIME_38_62MS, | |
26 | }; | |
27 | ||
28 | enum max14577_muic_status { | |
29 | MAX14577_MUIC_STATUS1 = 0, | |
30 | MAX14577_MUIC_STATUS2 = 1, | |
31 | MAX14577_MUIC_STATUS_END, | |
32 | }; | |
33 | ||
0ca852b7 KK |
34 | /** |
35 | * struct max14577_muic_irq | |
36 | * @irq: the index of irq list of MUIC device. | |
37 | * @name: the name of irq. | |
38 | * @virq: the virtual irq to use irq domain | |
39 | */ | |
40 | struct max14577_muic_irq { | |
41 | unsigned int irq; | |
42 | const char *name; | |
43 | unsigned int virq; | |
44 | }; | |
45 | ||
46 | static struct max14577_muic_irq max14577_muic_irqs[] = { | |
47 | { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, | |
48 | { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, | |
49 | { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, | |
50 | { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, | |
51 | { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, | |
52 | { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, | |
53 | { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, | |
54 | { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, | |
55 | }; | |
56 | ||
4706a525 KK |
57 | static struct max14577_muic_irq max77836_muic_irqs[] = { |
58 | { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, | |
59 | { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, | |
60 | { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, | |
61 | { MAX77836_IRQ_INT1_ADC1K, "muic-ADC1K" }, | |
62 | { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, | |
63 | { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, | |
64 | { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, | |
65 | { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, | |
66 | { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, | |
67 | { MAX77836_IRQ_INT2_VIDRM, "muic-VIDRM" }, | |
68 | }; | |
69 | ||
962e56bf CC |
70 | struct max14577_muic_info { |
71 | struct device *dev; | |
72 | struct max14577 *max14577; | |
73 | struct extcon_dev *edev; | |
74 | int prev_cable_type; | |
75 | int prev_chg_type; | |
76 | u8 status[MAX14577_MUIC_STATUS_END]; | |
77 | ||
0ca852b7 KK |
78 | struct max14577_muic_irq *muic_irqs; |
79 | unsigned int muic_irqs_num; | |
962e56bf CC |
80 | bool irq_adc; |
81 | bool irq_chg; | |
82 | struct work_struct irq_work; | |
83 | struct mutex mutex; | |
84 | ||
85 | /* | |
86 | * Use delayed workqueue to detect cable state and then | |
87 | * notify cable state to notifiee/platform through uevent. | |
88 | * After completing the booting of platform, the extcon provider | |
89 | * driver should notify cable state to upper layer. | |
90 | */ | |
91 | struct delayed_work wq_detcable; | |
92 | ||
93 | /* | |
94 | * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB | |
95 | * h/w path of COMP2/COMN1 on CONTROL1 register. | |
96 | */ | |
97 | int path_usb; | |
98 | int path_uart; | |
99 | }; | |
100 | ||
101 | enum max14577_muic_cable_group { | |
102 | MAX14577_CABLE_GROUP_ADC = 0, | |
103 | MAX14577_CABLE_GROUP_CHG, | |
104 | }; | |
105 | ||
962e56bf CC |
106 | /* Define supported accessory type */ |
107 | enum max14577_muic_acc_type { | |
108 | MAX14577_MUIC_ADC_GROUND = 0x0, | |
109 | MAX14577_MUIC_ADC_SEND_END_BUTTON, | |
110 | MAX14577_MUIC_ADC_REMOTE_S1_BUTTON, | |
111 | MAX14577_MUIC_ADC_REMOTE_S2_BUTTON, | |
112 | MAX14577_MUIC_ADC_REMOTE_S3_BUTTON, | |
113 | MAX14577_MUIC_ADC_REMOTE_S4_BUTTON, | |
114 | MAX14577_MUIC_ADC_REMOTE_S5_BUTTON, | |
115 | MAX14577_MUIC_ADC_REMOTE_S6_BUTTON, | |
116 | MAX14577_MUIC_ADC_REMOTE_S7_BUTTON, | |
117 | MAX14577_MUIC_ADC_REMOTE_S8_BUTTON, | |
118 | MAX14577_MUIC_ADC_REMOTE_S9_BUTTON, | |
119 | MAX14577_MUIC_ADC_REMOTE_S10_BUTTON, | |
120 | MAX14577_MUIC_ADC_REMOTE_S11_BUTTON, | |
121 | MAX14577_MUIC_ADC_REMOTE_S12_BUTTON, | |
122 | MAX14577_MUIC_ADC_RESERVED_ACC_1, | |
123 | MAX14577_MUIC_ADC_RESERVED_ACC_2, | |
124 | MAX14577_MUIC_ADC_RESERVED_ACC_3, | |
125 | MAX14577_MUIC_ADC_RESERVED_ACC_4, | |
126 | MAX14577_MUIC_ADC_RESERVED_ACC_5, | |
127 | MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2, | |
128 | MAX14577_MUIC_ADC_PHONE_POWERED_DEV, | |
129 | MAX14577_MUIC_ADC_TTY_CONVERTER, | |
130 | MAX14577_MUIC_ADC_UART_CABLE, | |
131 | MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG, | |
132 | MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF, | |
133 | MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON, | |
134 | MAX14577_MUIC_ADC_AV_CABLE_NOLOAD, | |
135 | MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG, | |
136 | MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF, | |
137 | MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON, | |
138 | MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */ | |
139 | MAX14577_MUIC_ADC_OPEN, | |
140 | }; | |
141 | ||
73b6ecdb | 142 | static const unsigned int max14577_extcon_cable[] = { |
2a9de9c0 | 143 | EXTCON_USB, |
8b45b6a0 | 144 | EXTCON_CHG_USB_SDP, |
11eecf91 CC |
145 | EXTCON_CHG_USB_DCP, |
146 | EXTCON_CHG_USB_FAST, | |
147 | EXTCON_CHG_USB_SLOW, | |
148 | EXTCON_CHG_USB_CDP, | |
2a9de9c0 CC |
149 | EXTCON_JIG, |
150 | EXTCON_NONE, | |
962e56bf CC |
151 | }; |
152 | ||
153 | /* | |
154 | * max14577_muic_set_debounce_time - Set the debounce time of ADC | |
155 | * @info: the instance including private data of max14577 MUIC | |
156 | * @time: the debounce time of ADC | |
157 | */ | |
158 | static int max14577_muic_set_debounce_time(struct max14577_muic_info *info, | |
159 | enum max14577_muic_adc_debounce_time time) | |
160 | { | |
161 | u8 ret; | |
162 | ||
163 | switch (time) { | |
164 | case ADC_DEBOUNCE_TIME_5MS: | |
165 | case ADC_DEBOUNCE_TIME_10MS: | |
166 | case ADC_DEBOUNCE_TIME_25MS: | |
167 | case ADC_DEBOUNCE_TIME_38_62MS: | |
168 | ret = max14577_update_reg(info->max14577->regmap, | |
169 | MAX14577_MUIC_REG_CONTROL3, | |
170 | CTRL3_ADCDBSET_MASK, | |
171 | time << CTRL3_ADCDBSET_SHIFT); | |
172 | if (ret) { | |
173 | dev_err(info->dev, "failed to set ADC debounce time\n"); | |
174 | return ret; | |
175 | } | |
176 | break; | |
177 | default: | |
178 | dev_err(info->dev, "invalid ADC debounce time\n"); | |
179 | return -EINVAL; | |
180 | } | |
181 | ||
182 | return 0; | |
183 | }; | |
184 | ||
185 | /* | |
186 | * max14577_muic_set_path - Set hardware line according to attached cable | |
187 | * @info: the instance including private data of max14577 MUIC | |
188 | * @value: the path according to attached cable | |
189 | * @attached: the state of cable (true:attached, false:detached) | |
190 | * | |
191 | * The max14577 MUIC device share outside H/W line among a varity of cables | |
192 | * so, this function set internal path of H/W line according to the type of | |
193 | * attached cable. | |
194 | */ | |
195 | static int max14577_muic_set_path(struct max14577_muic_info *info, | |
196 | u8 val, bool attached) | |
197 | { | |
962e56bf | 198 | u8 ctrl1, ctrl2 = 0; |
b743483b | 199 | int ret; |
962e56bf CC |
200 | |
201 | /* Set open state to path before changing hw path */ | |
202 | ret = max14577_update_reg(info->max14577->regmap, | |
203 | MAX14577_MUIC_REG_CONTROL1, | |
204 | CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN); | |
205 | if (ret < 0) { | |
206 | dev_err(info->dev, "failed to update MUIC register\n"); | |
207 | return ret; | |
208 | } | |
209 | ||
210 | if (attached) | |
211 | ctrl1 = val; | |
212 | else | |
213 | ctrl1 = CTRL1_SW_OPEN; | |
214 | ||
215 | ret = max14577_update_reg(info->max14577->regmap, | |
216 | MAX14577_MUIC_REG_CONTROL1, | |
217 | CLEAR_IDBEN_MICEN_MASK, ctrl1); | |
218 | if (ret < 0) { | |
219 | dev_err(info->dev, "failed to update MUIC register\n"); | |
220 | return ret; | |
221 | } | |
222 | ||
223 | if (attached) | |
224 | ctrl2 |= CTRL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ | |
225 | else | |
226 | ctrl2 |= CTRL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ | |
227 | ||
228 | ret = max14577_update_reg(info->max14577->regmap, | |
229 | MAX14577_REG_CONTROL2, | |
230 | CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2); | |
231 | if (ret < 0) { | |
232 | dev_err(info->dev, "failed to update MUIC register\n"); | |
233 | return ret; | |
234 | } | |
235 | ||
236 | dev_dbg(info->dev, | |
237 | "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", | |
238 | ctrl1, ctrl2, attached ? "attached" : "detached"); | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
243 | /* | |
244 | * max14577_muic_get_cable_type - Return cable type and check cable state | |
245 | * @info: the instance including private data of max14577 MUIC | |
246 | * @group: the path according to attached cable | |
247 | * @attached: store cable state and return | |
248 | * | |
249 | * This function check the cable state either attached or detached, | |
250 | * and then divide precise type of cable according to cable group. | |
251 | * - max14577_CABLE_GROUP_ADC | |
252 | * - max14577_CABLE_GROUP_CHG | |
253 | */ | |
254 | static int max14577_muic_get_cable_type(struct max14577_muic_info *info, | |
255 | enum max14577_muic_cable_group group, bool *attached) | |
256 | { | |
257 | int cable_type = 0; | |
258 | int adc; | |
259 | int chg_type; | |
260 | ||
261 | switch (group) { | |
262 | case MAX14577_CABLE_GROUP_ADC: | |
263 | /* | |
264 | * Read ADC value to check cable type and decide cable state | |
265 | * according to cable type | |
266 | */ | |
267 | adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK; | |
268 | adc >>= STATUS1_ADC_SHIFT; | |
269 | ||
270 | /* | |
271 | * Check current cable state/cable type and store cable type | |
272 | * (info->prev_cable_type) for handling cable when cable is | |
273 | * detached. | |
274 | */ | |
275 | if (adc == MAX14577_MUIC_ADC_OPEN) { | |
276 | *attached = false; | |
277 | ||
278 | cable_type = info->prev_cable_type; | |
279 | info->prev_cable_type = MAX14577_MUIC_ADC_OPEN; | |
280 | } else { | |
281 | *attached = true; | |
282 | ||
283 | cable_type = info->prev_cable_type = adc; | |
284 | } | |
285 | break; | |
286 | case MAX14577_CABLE_GROUP_CHG: | |
287 | /* | |
288 | * Read charger type to check cable type and decide cable state | |
289 | * according to type of charger cable. | |
290 | */ | |
291 | chg_type = info->status[MAX14577_MUIC_STATUS2] & | |
292 | STATUS2_CHGTYP_MASK; | |
293 | chg_type >>= STATUS2_CHGTYP_SHIFT; | |
294 | ||
295 | if (chg_type == MAX14577_CHARGER_TYPE_NONE) { | |
296 | *attached = false; | |
297 | ||
298 | cable_type = info->prev_chg_type; | |
299 | info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE; | |
300 | } else { | |
301 | *attached = true; | |
302 | ||
303 | /* | |
304 | * Check current cable state/cable type and store cable | |
305 | * type(info->prev_chg_type) for handling cable when | |
306 | * charger cable is detached. | |
307 | */ | |
308 | cable_type = info->prev_chg_type = chg_type; | |
309 | } | |
310 | ||
311 | break; | |
312 | default: | |
313 | dev_err(info->dev, "Unknown cable group (%d)\n", group); | |
314 | cable_type = -EINVAL; | |
315 | break; | |
316 | } | |
317 | ||
318 | return cable_type; | |
319 | } | |
320 | ||
321 | static int max14577_muic_jig_handler(struct max14577_muic_info *info, | |
322 | int cable_type, bool attached) | |
323 | { | |
962e56bf CC |
324 | int ret = 0; |
325 | u8 path = CTRL1_SW_OPEN; | |
326 | ||
327 | dev_dbg(info->dev, | |
328 | "external connector is %s (adc:0x%02x)\n", | |
329 | attached ? "attached" : "detached", cable_type); | |
330 | ||
331 | switch (cable_type) { | |
332 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */ | |
962e56bf CC |
333 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */ |
334 | /* PATH:AP_USB */ | |
962e56bf CC |
335 | path = CTRL1_SW_USB; |
336 | break; | |
337 | case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */ | |
338 | /* PATH:AP_UART */ | |
962e56bf CC |
339 | path = CTRL1_SW_UART; |
340 | break; | |
341 | default: | |
342 | dev_err(info->dev, "failed to detect %s jig cable\n", | |
343 | attached ? "attached" : "detached"); | |
344 | return -EINVAL; | |
345 | } | |
346 | ||
347 | ret = max14577_muic_set_path(info, path, attached); | |
348 | if (ret < 0) | |
349 | return ret; | |
350 | ||
8670b459 | 351 | extcon_set_state_sync(info->edev, EXTCON_JIG, attached); |
962e56bf CC |
352 | |
353 | return 0; | |
354 | } | |
355 | ||
356 | static int max14577_muic_adc_handler(struct max14577_muic_info *info) | |
357 | { | |
358 | int cable_type; | |
359 | bool attached; | |
360 | int ret = 0; | |
361 | ||
362 | /* Check accessory state which is either detached or attached */ | |
363 | cable_type = max14577_muic_get_cable_type(info, | |
364 | MAX14577_CABLE_GROUP_ADC, &attached); | |
365 | ||
366 | dev_dbg(info->dev, | |
367 | "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", | |
368 | attached ? "attached" : "detached", cable_type, | |
369 | info->prev_cable_type); | |
370 | ||
371 | switch (cable_type) { | |
372 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
373 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: | |
374 | case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
375 | /* JIG */ | |
376 | ret = max14577_muic_jig_handler(info, cable_type, attached); | |
377 | if (ret < 0) | |
378 | return ret; | |
379 | break; | |
380 | case MAX14577_MUIC_ADC_GROUND: | |
381 | case MAX14577_MUIC_ADC_SEND_END_BUTTON: | |
382 | case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON: | |
383 | case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON: | |
384 | case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON: | |
385 | case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON: | |
386 | case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON: | |
387 | case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON: | |
388 | case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON: | |
389 | case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON: | |
390 | case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON: | |
391 | case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON: | |
392 | case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON: | |
393 | case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON: | |
394 | case MAX14577_MUIC_ADC_RESERVED_ACC_1: | |
395 | case MAX14577_MUIC_ADC_RESERVED_ACC_2: | |
396 | case MAX14577_MUIC_ADC_RESERVED_ACC_3: | |
397 | case MAX14577_MUIC_ADC_RESERVED_ACC_4: | |
398 | case MAX14577_MUIC_ADC_RESERVED_ACC_5: | |
399 | case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2: | |
400 | case MAX14577_MUIC_ADC_PHONE_POWERED_DEV: | |
401 | case MAX14577_MUIC_ADC_TTY_CONVERTER: | |
402 | case MAX14577_MUIC_ADC_UART_CABLE: | |
403 | case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG: | |
404 | case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD: | |
405 | case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG: | |
406 | case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON: | |
407 | case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1: | |
408 | /* | |
409 | * This accessory isn't used in general case if it is specially | |
410 | * needed to detect additional accessory, should implement | |
411 | * proper operation when this accessory is attached/detached. | |
412 | */ | |
413 | dev_info(info->dev, | |
414 | "accessory is %s but it isn't used (adc:0x%x)\n", | |
415 | attached ? "attached" : "detached", cable_type); | |
416 | return -EAGAIN; | |
417 | default: | |
418 | dev_err(info->dev, | |
419 | "failed to detect %s accessory (adc:0x%x)\n", | |
420 | attached ? "attached" : "detached", cable_type); | |
421 | return -EINVAL; | |
422 | } | |
423 | ||
424 | return 0; | |
425 | } | |
426 | ||
427 | static int max14577_muic_chg_handler(struct max14577_muic_info *info) | |
428 | { | |
429 | int chg_type; | |
430 | bool attached; | |
431 | int ret = 0; | |
432 | ||
433 | chg_type = max14577_muic_get_cable_type(info, | |
434 | MAX14577_CABLE_GROUP_CHG, &attached); | |
435 | ||
436 | dev_dbg(info->dev, | |
437 | "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", | |
438 | attached ? "attached" : "detached", | |
439 | chg_type, info->prev_chg_type); | |
440 | ||
441 | switch (chg_type) { | |
442 | case MAX14577_CHARGER_TYPE_USB: | |
443 | /* PATH:AP_USB */ | |
444 | ret = max14577_muic_set_path(info, info->path_usb, attached); | |
445 | if (ret < 0) | |
446 | return ret; | |
447 | ||
8670b459 CC |
448 | extcon_set_state_sync(info->edev, EXTCON_USB, attached); |
449 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, | |
8b45b6a0 | 450 | attached); |
962e56bf CC |
451 | break; |
452 | case MAX14577_CHARGER_TYPE_DEDICATED_CHG: | |
8670b459 | 453 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, |
11eecf91 | 454 | attached); |
962e56bf CC |
455 | break; |
456 | case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT: | |
8670b459 | 457 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, |
2a9de9c0 | 458 | attached); |
962e56bf CC |
459 | break; |
460 | case MAX14577_CHARGER_TYPE_SPECIAL_500MA: | |
8670b459 | 461 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, |
2a9de9c0 | 462 | attached); |
962e56bf CC |
463 | break; |
464 | case MAX14577_CHARGER_TYPE_SPECIAL_1A: | |
8670b459 | 465 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, |
2a9de9c0 | 466 | attached); |
962e56bf CC |
467 | break; |
468 | case MAX14577_CHARGER_TYPE_NONE: | |
469 | case MAX14577_CHARGER_TYPE_DEAD_BATTERY: | |
470 | break; | |
471 | default: | |
472 | dev_err(info->dev, | |
473 | "failed to detect %s accessory (chg_type:0x%x)\n", | |
474 | attached ? "attached" : "detached", chg_type); | |
475 | return -EINVAL; | |
476 | } | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
481 | static void max14577_muic_irq_work(struct work_struct *work) | |
482 | { | |
483 | struct max14577_muic_info *info = container_of(work, | |
484 | struct max14577_muic_info, irq_work); | |
485 | int ret = 0; | |
486 | ||
487 | if (!info->edev) | |
488 | return; | |
489 | ||
490 | mutex_lock(&info->mutex); | |
491 | ||
492 | ret = max14577_bulk_read(info->max14577->regmap, | |
493 | MAX14577_MUIC_REG_STATUS1, info->status, 2); | |
494 | if (ret) { | |
495 | dev_err(info->dev, "failed to read MUIC register\n"); | |
496 | mutex_unlock(&info->mutex); | |
497 | return; | |
498 | } | |
499 | ||
500 | if (info->irq_adc) { | |
501 | ret = max14577_muic_adc_handler(info); | |
502 | info->irq_adc = false; | |
503 | } | |
504 | if (info->irq_chg) { | |
505 | ret = max14577_muic_chg_handler(info); | |
506 | info->irq_chg = false; | |
507 | } | |
508 | ||
509 | if (ret < 0) | |
510 | dev_err(info->dev, "failed to handle MUIC interrupt\n"); | |
511 | ||
512 | mutex_unlock(&info->mutex); | |
962e56bf CC |
513 | } |
514 | ||
4706a525 KK |
515 | /* |
516 | * Sets irq_adc or irq_chg in max14577_muic_info and returns 1. | |
517 | * Returns 0 if irq_type does not match registered IRQ for this device type. | |
518 | */ | |
519 | static int max14577_parse_irq(struct max14577_muic_info *info, int irq_type) | |
962e56bf | 520 | { |
962e56bf CC |
521 | switch (irq_type) { |
522 | case MAX14577_IRQ_INT1_ADC: | |
523 | case MAX14577_IRQ_INT1_ADCLOW: | |
524 | case MAX14577_IRQ_INT1_ADCERR: | |
af57fa4d SR |
525 | /* |
526 | * Handle all of accessory except for | |
527 | * type of charger accessory. | |
528 | */ | |
962e56bf | 529 | info->irq_adc = true; |
4706a525 | 530 | return 1; |
962e56bf CC |
531 | case MAX14577_IRQ_INT2_CHGTYP: |
532 | case MAX14577_IRQ_INT2_CHGDETRUN: | |
533 | case MAX14577_IRQ_INT2_DCDTMR: | |
534 | case MAX14577_IRQ_INT2_DBCHG: | |
535 | case MAX14577_IRQ_INT2_VBVOLT: | |
536 | /* Handle charger accessory */ | |
537 | info->irq_chg = true; | |
4706a525 KK |
538 | return 1; |
539 | default: | |
540 | return 0; | |
541 | } | |
542 | } | |
543 | ||
544 | /* | |
545 | * Sets irq_adc or irq_chg in max14577_muic_info and returns 1. | |
546 | * Returns 0 if irq_type does not match registered IRQ for this device type. | |
547 | */ | |
548 | static int max77836_parse_irq(struct max14577_muic_info *info, int irq_type) | |
549 | { | |
550 | /* First check common max14577 interrupts */ | |
551 | if (max14577_parse_irq(info, irq_type)) | |
552 | return 1; | |
553 | ||
554 | switch (irq_type) { | |
555 | case MAX77836_IRQ_INT1_ADC1K: | |
556 | info->irq_adc = true; | |
557 | return 1; | |
558 | case MAX77836_IRQ_INT2_VIDRM: | |
559 | /* Handle charger accessory */ | |
560 | info->irq_chg = true; | |
561 | return 1; | |
562 | default: | |
563 | return 0; | |
564 | } | |
565 | } | |
566 | ||
567 | static irqreturn_t max14577_muic_irq_handler(int irq, void *data) | |
568 | { | |
569 | struct max14577_muic_info *info = data; | |
570 | int i, irq_type = -1; | |
571 | bool irq_parsed; | |
572 | ||
573 | /* | |
574 | * We may be called multiple times for different nested IRQ-s. | |
575 | * Including changes in INT1_ADC and INT2_CGHTYP at once. | |
576 | * However we only need to know whether it was ADC, charger | |
577 | * or both interrupts so decode IRQ and turn on proper flags. | |
578 | */ | |
579 | for (i = 0; i < info->muic_irqs_num; i++) | |
580 | if (irq == info->muic_irqs[i].virq) | |
581 | irq_type = info->muic_irqs[i].irq; | |
582 | ||
583 | switch (info->max14577->dev_type) { | |
584 | case MAXIM_DEVICE_TYPE_MAX77836: | |
585 | irq_parsed = max77836_parse_irq(info, irq_type); | |
962e56bf | 586 | break; |
4706a525 | 587 | case MAXIM_DEVICE_TYPE_MAX14577: |
962e56bf | 588 | default: |
4706a525 KK |
589 | irq_parsed = max14577_parse_irq(info, irq_type); |
590 | break; | |
591 | } | |
592 | ||
593 | if (!irq_parsed) { | |
962e56bf CC |
594 | dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n", |
595 | irq_type); | |
596 | return IRQ_HANDLED; | |
597 | } | |
598 | schedule_work(&info->irq_work); | |
599 | ||
600 | return IRQ_HANDLED; | |
601 | } | |
602 | ||
603 | static int max14577_muic_detect_accessory(struct max14577_muic_info *info) | |
604 | { | |
605 | int ret = 0; | |
606 | int adc; | |
607 | int chg_type; | |
608 | bool attached; | |
609 | ||
610 | mutex_lock(&info->mutex); | |
611 | ||
612 | /* Read STATUSx register to detect accessory */ | |
613 | ret = max14577_bulk_read(info->max14577->regmap, | |
614 | MAX14577_MUIC_REG_STATUS1, info->status, 2); | |
615 | if (ret) { | |
616 | dev_err(info->dev, "failed to read MUIC register\n"); | |
617 | mutex_unlock(&info->mutex); | |
618 | return ret; | |
619 | } | |
620 | ||
621 | adc = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC, | |
622 | &attached); | |
623 | if (attached && adc != MAX14577_MUIC_ADC_OPEN) { | |
624 | ret = max14577_muic_adc_handler(info); | |
625 | if (ret < 0) { | |
626 | dev_err(info->dev, "Cannot detect accessory\n"); | |
627 | mutex_unlock(&info->mutex); | |
628 | return ret; | |
629 | } | |
630 | } | |
631 | ||
632 | chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG, | |
633 | &attached); | |
634 | if (attached && chg_type != MAX14577_CHARGER_TYPE_NONE) { | |
635 | ret = max14577_muic_chg_handler(info); | |
636 | if (ret < 0) { | |
637 | dev_err(info->dev, "Cannot detect charger accessory\n"); | |
638 | mutex_unlock(&info->mutex); | |
639 | return ret; | |
640 | } | |
641 | } | |
642 | ||
643 | mutex_unlock(&info->mutex); | |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
648 | static void max14577_muic_detect_cable_wq(struct work_struct *work) | |
649 | { | |
650 | struct max14577_muic_info *info = container_of(to_delayed_work(work), | |
651 | struct max14577_muic_info, wq_detcable); | |
652 | ||
653 | max14577_muic_detect_accessory(info); | |
654 | } | |
655 | ||
656 | static int max14577_muic_probe(struct platform_device *pdev) | |
657 | { | |
658 | struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent); | |
659 | struct max14577_muic_info *info; | |
660 | int delay_jiffies; | |
5a196c29 MS |
661 | int cable_type; |
662 | bool attached; | |
962e56bf CC |
663 | int ret; |
664 | int i; | |
665 | u8 id; | |
666 | ||
667 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
0a16ee63 | 668 | if (!info) |
962e56bf | 669 | return -ENOMEM; |
0a16ee63 | 670 | |
962e56bf CC |
671 | info->dev = &pdev->dev; |
672 | info->max14577 = max14577; | |
673 | ||
674 | platform_set_drvdata(pdev, info); | |
675 | mutex_init(&info->mutex); | |
676 | ||
14ad7682 MV |
677 | ret = devm_work_autocancel(&pdev->dev, &info->irq_work, |
678 | max14577_muic_irq_work); | |
679 | if (ret) | |
680 | return ret; | |
962e56bf | 681 | |
0ca852b7 | 682 | switch (max14577->dev_type) { |
4706a525 KK |
683 | case MAXIM_DEVICE_TYPE_MAX77836: |
684 | info->muic_irqs = max77836_muic_irqs; | |
685 | info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs); | |
686 | break; | |
0ca852b7 KK |
687 | case MAXIM_DEVICE_TYPE_MAX14577: |
688 | default: | |
689 | info->muic_irqs = max14577_muic_irqs; | |
690 | info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs); | |
691 | } | |
692 | ||
962e56bf | 693 | /* Support irq domain for max14577 MUIC device */ |
0ca852b7 KK |
694 | for (i = 0; i < info->muic_irqs_num; i++) { |
695 | struct max14577_muic_irq *muic_irq = &info->muic_irqs[i]; | |
c2957563 | 696 | int virq = 0; |
962e56bf CC |
697 | |
698 | virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq); | |
369afd4b | 699 | if (virq <= 0) |
962e56bf CC |
700 | return -EINVAL; |
701 | muic_irq->virq = virq; | |
702 | ||
703 | ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, | |
704 | max14577_muic_irq_handler, | |
705 | IRQF_NO_SUSPEND, | |
706 | muic_irq->name, info); | |
707 | if (ret) { | |
708 | dev_err(&pdev->dev, | |
34825e51 | 709 | "failed: irq request (IRQ: %d, error :%d)\n", |
962e56bf CC |
710 | muic_irq->irq, ret); |
711 | return ret; | |
712 | } | |
713 | } | |
714 | ||
715 | /* Initialize extcon device */ | |
0604002c CC |
716 | info->edev = devm_extcon_dev_allocate(&pdev->dev, |
717 | max14577_extcon_cable); | |
718 | if (IS_ERR(info->edev)) { | |
962e56bf | 719 | dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); |
4e984d83 | 720 | return PTR_ERR(info->edev); |
962e56bf | 721 | } |
4005da5c | 722 | |
14dbd549 | 723 | ret = devm_extcon_dev_register(&pdev->dev, info->edev); |
962e56bf CC |
724 | if (ret) { |
725 | dev_err(&pdev->dev, "failed to register extcon device\n"); | |
726 | return ret; | |
727 | } | |
728 | ||
729 | /* Default h/w line path */ | |
730 | info->path_usb = CTRL1_SW_USB; | |
731 | info->path_uart = CTRL1_SW_UART; | |
732 | delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); | |
733 | ||
5a196c29 MS |
734 | /* Set initial path for UART when JIG is connected to get serial logs */ |
735 | ret = max14577_bulk_read(info->max14577->regmap, | |
736 | MAX14577_MUIC_REG_STATUS1, info->status, 2); | |
737 | if (ret) { | |
738 | dev_err(info->dev, "Cannot read STATUS registers\n"); | |
739 | return ret; | |
740 | } | |
741 | cable_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC, | |
742 | &attached); | |
743 | if (attached && cable_type == MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF) | |
744 | max14577_muic_set_path(info, info->path_uart, true); | |
962e56bf CC |
745 | |
746 | /* Check revision number of MUIC device*/ | |
747 | ret = max14577_read_reg(info->max14577->regmap, | |
748 | MAX14577_REG_DEVICEID, &id); | |
749 | if (ret < 0) { | |
750 | dev_err(&pdev->dev, "failed to read revision number\n"); | |
14dbd549 | 751 | return ret; |
962e56bf CC |
752 | } |
753 | dev_info(info->dev, "device ID : 0x%x\n", id); | |
754 | ||
755 | /* Set ADC debounce time */ | |
756 | max14577_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); | |
757 | ||
758 | /* | |
759 | * Detect accessory after completing the initialization of platform | |
760 | * | |
761 | * - Use delayed workqueue to detect cable state and then | |
762 | * notify cable state to notifiee/platform through uevent. | |
763 | * After completing the booting of platform, the extcon provider | |
764 | * driver should notify cable state to upper layer. | |
765 | */ | |
766 | INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq); | |
12adef5b | 767 | queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, |
962e56bf | 768 | delay_jiffies); |
962e56bf CC |
769 | |
770 | return ret; | |
962e56bf CC |
771 | } |
772 | ||
4706a525 KK |
773 | static const struct platform_device_id max14577_muic_id[] = { |
774 | { "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, }, | |
775 | { "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, }, | |
776 | { } | |
777 | }; | |
778 | MODULE_DEVICE_TABLE(platform, max14577_muic_id); | |
779 | ||
3d6954dd MS |
780 | static const struct of_device_id of_max14577_muic_dt_match[] = { |
781 | { .compatible = "maxim,max14577-muic", | |
782 | .data = (void *)MAXIM_DEVICE_TYPE_MAX14577, }, | |
783 | { .compatible = "maxim,max77836-muic", | |
784 | .data = (void *)MAXIM_DEVICE_TYPE_MAX77836, }, | |
785 | { }, | |
786 | }; | |
787 | MODULE_DEVICE_TABLE(of, of_max14577_muic_dt_match); | |
788 | ||
962e56bf CC |
789 | static struct platform_driver max14577_muic_driver = { |
790 | .driver = { | |
4005da5c | 791 | .name = "max14577-muic", |
3d6954dd | 792 | .of_match_table = of_max14577_muic_dt_match, |
962e56bf CC |
793 | }, |
794 | .probe = max14577_muic_probe, | |
4706a525 | 795 | .id_table = max14577_muic_id, |
962e56bf CC |
796 | }; |
797 | ||
798 | module_platform_driver(max14577_muic_driver); | |
799 | ||
4706a525 | 800 | MODULE_DESCRIPTION("Maxim 14577/77836 Extcon driver"); |
e5b07e55 | 801 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <krzk@kernel.org>"); |
962e56bf CC |
802 | MODULE_LICENSE("GPL"); |
803 | MODULE_ALIAS("platform:extcon-max14577"); |