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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 CC |
8 | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/i2c.h> | |
12 | #include <linux/interrupt.h> | |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/mfd/max14577.h> | |
15 | #include <linux/mfd/max14577-private.h> | |
176aa360 | 16 | #include <linux/extcon-provider.h> |
962e56bf | 17 | |
962e56bf CC |
18 | #define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ |
19 | ||
20 | enum max14577_muic_adc_debounce_time { | |
21 | ADC_DEBOUNCE_TIME_5MS = 0, | |
22 | ADC_DEBOUNCE_TIME_10MS, | |
23 | ADC_DEBOUNCE_TIME_25MS, | |
24 | ADC_DEBOUNCE_TIME_38_62MS, | |
25 | }; | |
26 | ||
27 | enum max14577_muic_status { | |
28 | MAX14577_MUIC_STATUS1 = 0, | |
29 | MAX14577_MUIC_STATUS2 = 1, | |
30 | MAX14577_MUIC_STATUS_END, | |
31 | }; | |
32 | ||
0ca852b7 KK |
33 | /** |
34 | * struct max14577_muic_irq | |
35 | * @irq: the index of irq list of MUIC device. | |
36 | * @name: the name of irq. | |
37 | * @virq: the virtual irq to use irq domain | |
38 | */ | |
39 | struct max14577_muic_irq { | |
40 | unsigned int irq; | |
41 | const char *name; | |
42 | unsigned int virq; | |
43 | }; | |
44 | ||
45 | static struct max14577_muic_irq max14577_muic_irqs[] = { | |
46 | { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, | |
47 | { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, | |
48 | { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, | |
49 | { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, | |
50 | { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, | |
51 | { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, | |
52 | { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, | |
53 | { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, | |
54 | }; | |
55 | ||
4706a525 KK |
56 | static struct max14577_muic_irq max77836_muic_irqs[] = { |
57 | { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, | |
58 | { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, | |
59 | { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, | |
60 | { MAX77836_IRQ_INT1_ADC1K, "muic-ADC1K" }, | |
61 | { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, | |
62 | { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, | |
63 | { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, | |
64 | { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, | |
65 | { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, | |
66 | { MAX77836_IRQ_INT2_VIDRM, "muic-VIDRM" }, | |
67 | }; | |
68 | ||
962e56bf CC |
69 | struct max14577_muic_info { |
70 | struct device *dev; | |
71 | struct max14577 *max14577; | |
72 | struct extcon_dev *edev; | |
73 | int prev_cable_type; | |
74 | int prev_chg_type; | |
75 | u8 status[MAX14577_MUIC_STATUS_END]; | |
76 | ||
0ca852b7 KK |
77 | struct max14577_muic_irq *muic_irqs; |
78 | unsigned int muic_irqs_num; | |
962e56bf CC |
79 | bool irq_adc; |
80 | bool irq_chg; | |
81 | struct work_struct irq_work; | |
82 | struct mutex mutex; | |
83 | ||
84 | /* | |
85 | * Use delayed workqueue to detect cable state and then | |
86 | * notify cable state to notifiee/platform through uevent. | |
87 | * After completing the booting of platform, the extcon provider | |
88 | * driver should notify cable state to upper layer. | |
89 | */ | |
90 | struct delayed_work wq_detcable; | |
91 | ||
92 | /* | |
93 | * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB | |
94 | * h/w path of COMP2/COMN1 on CONTROL1 register. | |
95 | */ | |
96 | int path_usb; | |
97 | int path_uart; | |
98 | }; | |
99 | ||
100 | enum max14577_muic_cable_group { | |
101 | MAX14577_CABLE_GROUP_ADC = 0, | |
102 | MAX14577_CABLE_GROUP_CHG, | |
103 | }; | |
104 | ||
962e56bf CC |
105 | /* Define supported accessory type */ |
106 | enum max14577_muic_acc_type { | |
107 | MAX14577_MUIC_ADC_GROUND = 0x0, | |
108 | MAX14577_MUIC_ADC_SEND_END_BUTTON, | |
109 | MAX14577_MUIC_ADC_REMOTE_S1_BUTTON, | |
110 | MAX14577_MUIC_ADC_REMOTE_S2_BUTTON, | |
111 | MAX14577_MUIC_ADC_REMOTE_S3_BUTTON, | |
112 | MAX14577_MUIC_ADC_REMOTE_S4_BUTTON, | |
113 | MAX14577_MUIC_ADC_REMOTE_S5_BUTTON, | |
114 | MAX14577_MUIC_ADC_REMOTE_S6_BUTTON, | |
115 | MAX14577_MUIC_ADC_REMOTE_S7_BUTTON, | |
116 | MAX14577_MUIC_ADC_REMOTE_S8_BUTTON, | |
117 | MAX14577_MUIC_ADC_REMOTE_S9_BUTTON, | |
118 | MAX14577_MUIC_ADC_REMOTE_S10_BUTTON, | |
119 | MAX14577_MUIC_ADC_REMOTE_S11_BUTTON, | |
120 | MAX14577_MUIC_ADC_REMOTE_S12_BUTTON, | |
121 | MAX14577_MUIC_ADC_RESERVED_ACC_1, | |
122 | MAX14577_MUIC_ADC_RESERVED_ACC_2, | |
123 | MAX14577_MUIC_ADC_RESERVED_ACC_3, | |
124 | MAX14577_MUIC_ADC_RESERVED_ACC_4, | |
125 | MAX14577_MUIC_ADC_RESERVED_ACC_5, | |
126 | MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2, | |
127 | MAX14577_MUIC_ADC_PHONE_POWERED_DEV, | |
128 | MAX14577_MUIC_ADC_TTY_CONVERTER, | |
129 | MAX14577_MUIC_ADC_UART_CABLE, | |
130 | MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG, | |
131 | MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF, | |
132 | MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON, | |
133 | MAX14577_MUIC_ADC_AV_CABLE_NOLOAD, | |
134 | MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG, | |
135 | MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF, | |
136 | MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON, | |
137 | MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */ | |
138 | MAX14577_MUIC_ADC_OPEN, | |
139 | }; | |
140 | ||
73b6ecdb | 141 | static const unsigned int max14577_extcon_cable[] = { |
2a9de9c0 | 142 | EXTCON_USB, |
8b45b6a0 | 143 | EXTCON_CHG_USB_SDP, |
11eecf91 CC |
144 | EXTCON_CHG_USB_DCP, |
145 | EXTCON_CHG_USB_FAST, | |
146 | EXTCON_CHG_USB_SLOW, | |
147 | EXTCON_CHG_USB_CDP, | |
2a9de9c0 CC |
148 | EXTCON_JIG, |
149 | EXTCON_NONE, | |
962e56bf CC |
150 | }; |
151 | ||
152 | /* | |
153 | * max14577_muic_set_debounce_time - Set the debounce time of ADC | |
154 | * @info: the instance including private data of max14577 MUIC | |
155 | * @time: the debounce time of ADC | |
156 | */ | |
157 | static int max14577_muic_set_debounce_time(struct max14577_muic_info *info, | |
158 | enum max14577_muic_adc_debounce_time time) | |
159 | { | |
160 | u8 ret; | |
161 | ||
162 | switch (time) { | |
163 | case ADC_DEBOUNCE_TIME_5MS: | |
164 | case ADC_DEBOUNCE_TIME_10MS: | |
165 | case ADC_DEBOUNCE_TIME_25MS: | |
166 | case ADC_DEBOUNCE_TIME_38_62MS: | |
167 | ret = max14577_update_reg(info->max14577->regmap, | |
168 | MAX14577_MUIC_REG_CONTROL3, | |
169 | CTRL3_ADCDBSET_MASK, | |
170 | time << CTRL3_ADCDBSET_SHIFT); | |
171 | if (ret) { | |
172 | dev_err(info->dev, "failed to set ADC debounce time\n"); | |
173 | return ret; | |
174 | } | |
175 | break; | |
176 | default: | |
177 | dev_err(info->dev, "invalid ADC debounce time\n"); | |
178 | return -EINVAL; | |
179 | } | |
180 | ||
181 | return 0; | |
182 | }; | |
183 | ||
184 | /* | |
185 | * max14577_muic_set_path - Set hardware line according to attached cable | |
186 | * @info: the instance including private data of max14577 MUIC | |
187 | * @value: the path according to attached cable | |
188 | * @attached: the state of cable (true:attached, false:detached) | |
189 | * | |
190 | * The max14577 MUIC device share outside H/W line among a varity of cables | |
191 | * so, this function set internal path of H/W line according to the type of | |
192 | * attached cable. | |
193 | */ | |
194 | static int max14577_muic_set_path(struct max14577_muic_info *info, | |
195 | u8 val, bool attached) | |
196 | { | |
962e56bf | 197 | u8 ctrl1, ctrl2 = 0; |
b743483b | 198 | int ret; |
962e56bf CC |
199 | |
200 | /* Set open state to path before changing hw path */ | |
201 | ret = max14577_update_reg(info->max14577->regmap, | |
202 | MAX14577_MUIC_REG_CONTROL1, | |
203 | CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN); | |
204 | if (ret < 0) { | |
205 | dev_err(info->dev, "failed to update MUIC register\n"); | |
206 | return ret; | |
207 | } | |
208 | ||
209 | if (attached) | |
210 | ctrl1 = val; | |
211 | else | |
212 | ctrl1 = CTRL1_SW_OPEN; | |
213 | ||
214 | ret = max14577_update_reg(info->max14577->regmap, | |
215 | MAX14577_MUIC_REG_CONTROL1, | |
216 | CLEAR_IDBEN_MICEN_MASK, ctrl1); | |
217 | if (ret < 0) { | |
218 | dev_err(info->dev, "failed to update MUIC register\n"); | |
219 | return ret; | |
220 | } | |
221 | ||
222 | if (attached) | |
223 | ctrl2 |= CTRL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ | |
224 | else | |
225 | ctrl2 |= CTRL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ | |
226 | ||
227 | ret = max14577_update_reg(info->max14577->regmap, | |
228 | MAX14577_REG_CONTROL2, | |
229 | CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2); | |
230 | if (ret < 0) { | |
231 | dev_err(info->dev, "failed to update MUIC register\n"); | |
232 | return ret; | |
233 | } | |
234 | ||
235 | dev_dbg(info->dev, | |
236 | "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", | |
237 | ctrl1, ctrl2, attached ? "attached" : "detached"); | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
242 | /* | |
243 | * max14577_muic_get_cable_type - Return cable type and check cable state | |
244 | * @info: the instance including private data of max14577 MUIC | |
245 | * @group: the path according to attached cable | |
246 | * @attached: store cable state and return | |
247 | * | |
248 | * This function check the cable state either attached or detached, | |
249 | * and then divide precise type of cable according to cable group. | |
250 | * - max14577_CABLE_GROUP_ADC | |
251 | * - max14577_CABLE_GROUP_CHG | |
252 | */ | |
253 | static int max14577_muic_get_cable_type(struct max14577_muic_info *info, | |
254 | enum max14577_muic_cable_group group, bool *attached) | |
255 | { | |
256 | int cable_type = 0; | |
257 | int adc; | |
258 | int chg_type; | |
259 | ||
260 | switch (group) { | |
261 | case MAX14577_CABLE_GROUP_ADC: | |
262 | /* | |
263 | * Read ADC value to check cable type and decide cable state | |
264 | * according to cable type | |
265 | */ | |
266 | adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK; | |
267 | adc >>= STATUS1_ADC_SHIFT; | |
268 | ||
269 | /* | |
270 | * Check current cable state/cable type and store cable type | |
271 | * (info->prev_cable_type) for handling cable when cable is | |
272 | * detached. | |
273 | */ | |
274 | if (adc == MAX14577_MUIC_ADC_OPEN) { | |
275 | *attached = false; | |
276 | ||
277 | cable_type = info->prev_cable_type; | |
278 | info->prev_cable_type = MAX14577_MUIC_ADC_OPEN; | |
279 | } else { | |
280 | *attached = true; | |
281 | ||
282 | cable_type = info->prev_cable_type = adc; | |
283 | } | |
284 | break; | |
285 | case MAX14577_CABLE_GROUP_CHG: | |
286 | /* | |
287 | * Read charger type to check cable type and decide cable state | |
288 | * according to type of charger cable. | |
289 | */ | |
290 | chg_type = info->status[MAX14577_MUIC_STATUS2] & | |
291 | STATUS2_CHGTYP_MASK; | |
292 | chg_type >>= STATUS2_CHGTYP_SHIFT; | |
293 | ||
294 | if (chg_type == MAX14577_CHARGER_TYPE_NONE) { | |
295 | *attached = false; | |
296 | ||
297 | cable_type = info->prev_chg_type; | |
298 | info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE; | |
299 | } else { | |
300 | *attached = true; | |
301 | ||
302 | /* | |
303 | * Check current cable state/cable type and store cable | |
304 | * type(info->prev_chg_type) for handling cable when | |
305 | * charger cable is detached. | |
306 | */ | |
307 | cable_type = info->prev_chg_type = chg_type; | |
308 | } | |
309 | ||
310 | break; | |
311 | default: | |
312 | dev_err(info->dev, "Unknown cable group (%d)\n", group); | |
313 | cable_type = -EINVAL; | |
314 | break; | |
315 | } | |
316 | ||
317 | return cable_type; | |
318 | } | |
319 | ||
320 | static int max14577_muic_jig_handler(struct max14577_muic_info *info, | |
321 | int cable_type, bool attached) | |
322 | { | |
962e56bf CC |
323 | int ret = 0; |
324 | u8 path = CTRL1_SW_OPEN; | |
325 | ||
326 | dev_dbg(info->dev, | |
327 | "external connector is %s (adc:0x%02x)\n", | |
328 | attached ? "attached" : "detached", cable_type); | |
329 | ||
330 | switch (cable_type) { | |
331 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */ | |
962e56bf CC |
332 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */ |
333 | /* PATH:AP_USB */ | |
962e56bf CC |
334 | path = CTRL1_SW_USB; |
335 | break; | |
336 | case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */ | |
337 | /* PATH:AP_UART */ | |
962e56bf CC |
338 | path = CTRL1_SW_UART; |
339 | break; | |
340 | default: | |
341 | dev_err(info->dev, "failed to detect %s jig cable\n", | |
342 | attached ? "attached" : "detached"); | |
343 | return -EINVAL; | |
344 | } | |
345 | ||
346 | ret = max14577_muic_set_path(info, path, attached); | |
347 | if (ret < 0) | |
348 | return ret; | |
349 | ||
8670b459 | 350 | extcon_set_state_sync(info->edev, EXTCON_JIG, attached); |
962e56bf CC |
351 | |
352 | return 0; | |
353 | } | |
354 | ||
355 | static int max14577_muic_adc_handler(struct max14577_muic_info *info) | |
356 | { | |
357 | int cable_type; | |
358 | bool attached; | |
359 | int ret = 0; | |
360 | ||
361 | /* Check accessory state which is either detached or attached */ | |
362 | cable_type = max14577_muic_get_cable_type(info, | |
363 | MAX14577_CABLE_GROUP_ADC, &attached); | |
364 | ||
365 | dev_dbg(info->dev, | |
366 | "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", | |
367 | attached ? "attached" : "detached", cable_type, | |
368 | info->prev_cable_type); | |
369 | ||
370 | switch (cable_type) { | |
371 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
372 | case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: | |
373 | case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
374 | /* JIG */ | |
375 | ret = max14577_muic_jig_handler(info, cable_type, attached); | |
376 | if (ret < 0) | |
377 | return ret; | |
378 | break; | |
379 | case MAX14577_MUIC_ADC_GROUND: | |
380 | case MAX14577_MUIC_ADC_SEND_END_BUTTON: | |
381 | case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON: | |
382 | case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON: | |
383 | case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON: | |
384 | case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON: | |
385 | case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON: | |
386 | case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON: | |
387 | case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON: | |
388 | case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON: | |
389 | case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON: | |
390 | case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON: | |
391 | case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON: | |
392 | case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON: | |
393 | case MAX14577_MUIC_ADC_RESERVED_ACC_1: | |
394 | case MAX14577_MUIC_ADC_RESERVED_ACC_2: | |
395 | case MAX14577_MUIC_ADC_RESERVED_ACC_3: | |
396 | case MAX14577_MUIC_ADC_RESERVED_ACC_4: | |
397 | case MAX14577_MUIC_ADC_RESERVED_ACC_5: | |
398 | case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2: | |
399 | case MAX14577_MUIC_ADC_PHONE_POWERED_DEV: | |
400 | case MAX14577_MUIC_ADC_TTY_CONVERTER: | |
401 | case MAX14577_MUIC_ADC_UART_CABLE: | |
402 | case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG: | |
403 | case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD: | |
404 | case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG: | |
405 | case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON: | |
406 | case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1: | |
407 | /* | |
408 | * This accessory isn't used in general case if it is specially | |
409 | * needed to detect additional accessory, should implement | |
410 | * proper operation when this accessory is attached/detached. | |
411 | */ | |
412 | dev_info(info->dev, | |
413 | "accessory is %s but it isn't used (adc:0x%x)\n", | |
414 | attached ? "attached" : "detached", cable_type); | |
415 | return -EAGAIN; | |
416 | default: | |
417 | dev_err(info->dev, | |
418 | "failed to detect %s accessory (adc:0x%x)\n", | |
419 | attached ? "attached" : "detached", cable_type); | |
420 | return -EINVAL; | |
421 | } | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
426 | static int max14577_muic_chg_handler(struct max14577_muic_info *info) | |
427 | { | |
428 | int chg_type; | |
429 | bool attached; | |
430 | int ret = 0; | |
431 | ||
432 | chg_type = max14577_muic_get_cable_type(info, | |
433 | MAX14577_CABLE_GROUP_CHG, &attached); | |
434 | ||
435 | dev_dbg(info->dev, | |
436 | "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", | |
437 | attached ? "attached" : "detached", | |
438 | chg_type, info->prev_chg_type); | |
439 | ||
440 | switch (chg_type) { | |
441 | case MAX14577_CHARGER_TYPE_USB: | |
442 | /* PATH:AP_USB */ | |
443 | ret = max14577_muic_set_path(info, info->path_usb, attached); | |
444 | if (ret < 0) | |
445 | return ret; | |
446 | ||
8670b459 CC |
447 | extcon_set_state_sync(info->edev, EXTCON_USB, attached); |
448 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, | |
8b45b6a0 | 449 | attached); |
962e56bf CC |
450 | break; |
451 | case MAX14577_CHARGER_TYPE_DEDICATED_CHG: | |
8670b459 | 452 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, |
11eecf91 | 453 | attached); |
962e56bf CC |
454 | break; |
455 | case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT: | |
8670b459 | 456 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, |
2a9de9c0 | 457 | attached); |
962e56bf CC |
458 | break; |
459 | case MAX14577_CHARGER_TYPE_SPECIAL_500MA: | |
8670b459 | 460 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, |
2a9de9c0 | 461 | attached); |
962e56bf CC |
462 | break; |
463 | case MAX14577_CHARGER_TYPE_SPECIAL_1A: | |
8670b459 | 464 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, |
2a9de9c0 | 465 | attached); |
962e56bf CC |
466 | break; |
467 | case MAX14577_CHARGER_TYPE_NONE: | |
468 | case MAX14577_CHARGER_TYPE_DEAD_BATTERY: | |
469 | break; | |
470 | default: | |
471 | dev_err(info->dev, | |
472 | "failed to detect %s accessory (chg_type:0x%x)\n", | |
473 | attached ? "attached" : "detached", chg_type); | |
474 | return -EINVAL; | |
475 | } | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | static void max14577_muic_irq_work(struct work_struct *work) | |
481 | { | |
482 | struct max14577_muic_info *info = container_of(work, | |
483 | struct max14577_muic_info, irq_work); | |
484 | int ret = 0; | |
485 | ||
486 | if (!info->edev) | |
487 | return; | |
488 | ||
489 | mutex_lock(&info->mutex); | |
490 | ||
491 | ret = max14577_bulk_read(info->max14577->regmap, | |
492 | MAX14577_MUIC_REG_STATUS1, info->status, 2); | |
493 | if (ret) { | |
494 | dev_err(info->dev, "failed to read MUIC register\n"); | |
495 | mutex_unlock(&info->mutex); | |
496 | return; | |
497 | } | |
498 | ||
499 | if (info->irq_adc) { | |
500 | ret = max14577_muic_adc_handler(info); | |
501 | info->irq_adc = false; | |
502 | } | |
503 | if (info->irq_chg) { | |
504 | ret = max14577_muic_chg_handler(info); | |
505 | info->irq_chg = false; | |
506 | } | |
507 | ||
508 | if (ret < 0) | |
509 | dev_err(info->dev, "failed to handle MUIC interrupt\n"); | |
510 | ||
511 | mutex_unlock(&info->mutex); | |
962e56bf CC |
512 | } |
513 | ||
4706a525 KK |
514 | /* |
515 | * Sets irq_adc or irq_chg in max14577_muic_info and returns 1. | |
516 | * Returns 0 if irq_type does not match registered IRQ for this device type. | |
517 | */ | |
518 | static int max14577_parse_irq(struct max14577_muic_info *info, int irq_type) | |
962e56bf | 519 | { |
962e56bf CC |
520 | switch (irq_type) { |
521 | case MAX14577_IRQ_INT1_ADC: | |
522 | case MAX14577_IRQ_INT1_ADCLOW: | |
523 | case MAX14577_IRQ_INT1_ADCERR: | |
af57fa4d SR |
524 | /* |
525 | * Handle all of accessory except for | |
526 | * type of charger accessory. | |
527 | */ | |
962e56bf | 528 | info->irq_adc = true; |
4706a525 | 529 | return 1; |
962e56bf CC |
530 | case MAX14577_IRQ_INT2_CHGTYP: |
531 | case MAX14577_IRQ_INT2_CHGDETRUN: | |
532 | case MAX14577_IRQ_INT2_DCDTMR: | |
533 | case MAX14577_IRQ_INT2_DBCHG: | |
534 | case MAX14577_IRQ_INT2_VBVOLT: | |
535 | /* Handle charger accessory */ | |
536 | info->irq_chg = true; | |
4706a525 KK |
537 | return 1; |
538 | default: | |
539 | return 0; | |
540 | } | |
541 | } | |
542 | ||
543 | /* | |
544 | * Sets irq_adc or irq_chg in max14577_muic_info and returns 1. | |
545 | * Returns 0 if irq_type does not match registered IRQ for this device type. | |
546 | */ | |
547 | static int max77836_parse_irq(struct max14577_muic_info *info, int irq_type) | |
548 | { | |
549 | /* First check common max14577 interrupts */ | |
550 | if (max14577_parse_irq(info, irq_type)) | |
551 | return 1; | |
552 | ||
553 | switch (irq_type) { | |
554 | case MAX77836_IRQ_INT1_ADC1K: | |
555 | info->irq_adc = true; | |
556 | return 1; | |
557 | case MAX77836_IRQ_INT2_VIDRM: | |
558 | /* Handle charger accessory */ | |
559 | info->irq_chg = true; | |
560 | return 1; | |
561 | default: | |
562 | return 0; | |
563 | } | |
564 | } | |
565 | ||
566 | static irqreturn_t max14577_muic_irq_handler(int irq, void *data) | |
567 | { | |
568 | struct max14577_muic_info *info = data; | |
569 | int i, irq_type = -1; | |
570 | bool irq_parsed; | |
571 | ||
572 | /* | |
573 | * We may be called multiple times for different nested IRQ-s. | |
574 | * Including changes in INT1_ADC and INT2_CGHTYP at once. | |
575 | * However we only need to know whether it was ADC, charger | |
576 | * or both interrupts so decode IRQ and turn on proper flags. | |
577 | */ | |
578 | for (i = 0; i < info->muic_irqs_num; i++) | |
579 | if (irq == info->muic_irqs[i].virq) | |
580 | irq_type = info->muic_irqs[i].irq; | |
581 | ||
582 | switch (info->max14577->dev_type) { | |
583 | case MAXIM_DEVICE_TYPE_MAX77836: | |
584 | irq_parsed = max77836_parse_irq(info, irq_type); | |
962e56bf | 585 | break; |
4706a525 | 586 | case MAXIM_DEVICE_TYPE_MAX14577: |
962e56bf | 587 | default: |
4706a525 KK |
588 | irq_parsed = max14577_parse_irq(info, irq_type); |
589 | break; | |
590 | } | |
591 | ||
592 | if (!irq_parsed) { | |
962e56bf CC |
593 | dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n", |
594 | irq_type); | |
595 | return IRQ_HANDLED; | |
596 | } | |
597 | schedule_work(&info->irq_work); | |
598 | ||
599 | return IRQ_HANDLED; | |
600 | } | |
601 | ||
602 | static int max14577_muic_detect_accessory(struct max14577_muic_info *info) | |
603 | { | |
604 | int ret = 0; | |
605 | int adc; | |
606 | int chg_type; | |
607 | bool attached; | |
608 | ||
609 | mutex_lock(&info->mutex); | |
610 | ||
611 | /* Read STATUSx register to detect accessory */ | |
612 | ret = max14577_bulk_read(info->max14577->regmap, | |
613 | MAX14577_MUIC_REG_STATUS1, info->status, 2); | |
614 | if (ret) { | |
615 | dev_err(info->dev, "failed to read MUIC register\n"); | |
616 | mutex_unlock(&info->mutex); | |
617 | return ret; | |
618 | } | |
619 | ||
620 | adc = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC, | |
621 | &attached); | |
622 | if (attached && adc != MAX14577_MUIC_ADC_OPEN) { | |
623 | ret = max14577_muic_adc_handler(info); | |
624 | if (ret < 0) { | |
625 | dev_err(info->dev, "Cannot detect accessory\n"); | |
626 | mutex_unlock(&info->mutex); | |
627 | return ret; | |
628 | } | |
629 | } | |
630 | ||
631 | chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG, | |
632 | &attached); | |
633 | if (attached && chg_type != MAX14577_CHARGER_TYPE_NONE) { | |
634 | ret = max14577_muic_chg_handler(info); | |
635 | if (ret < 0) { | |
636 | dev_err(info->dev, "Cannot detect charger accessory\n"); | |
637 | mutex_unlock(&info->mutex); | |
638 | return ret; | |
639 | } | |
640 | } | |
641 | ||
642 | mutex_unlock(&info->mutex); | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
647 | static void max14577_muic_detect_cable_wq(struct work_struct *work) | |
648 | { | |
649 | struct max14577_muic_info *info = container_of(to_delayed_work(work), | |
650 | struct max14577_muic_info, wq_detcable); | |
651 | ||
652 | max14577_muic_detect_accessory(info); | |
653 | } | |
654 | ||
655 | static int max14577_muic_probe(struct platform_device *pdev) | |
656 | { | |
657 | struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent); | |
658 | struct max14577_muic_info *info; | |
659 | int delay_jiffies; | |
5a196c29 MS |
660 | int cable_type; |
661 | bool attached; | |
962e56bf CC |
662 | int ret; |
663 | int i; | |
664 | u8 id; | |
665 | ||
666 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
0a16ee63 | 667 | if (!info) |
962e56bf | 668 | return -ENOMEM; |
0a16ee63 | 669 | |
962e56bf CC |
670 | info->dev = &pdev->dev; |
671 | info->max14577 = max14577; | |
672 | ||
673 | platform_set_drvdata(pdev, info); | |
674 | mutex_init(&info->mutex); | |
675 | ||
676 | INIT_WORK(&info->irq_work, max14577_muic_irq_work); | |
677 | ||
0ca852b7 | 678 | switch (max14577->dev_type) { |
4706a525 KK |
679 | case MAXIM_DEVICE_TYPE_MAX77836: |
680 | info->muic_irqs = max77836_muic_irqs; | |
681 | info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs); | |
682 | break; | |
0ca852b7 KK |
683 | case MAXIM_DEVICE_TYPE_MAX14577: |
684 | default: | |
685 | info->muic_irqs = max14577_muic_irqs; | |
686 | info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs); | |
687 | } | |
688 | ||
962e56bf | 689 | /* Support irq domain for max14577 MUIC device */ |
0ca852b7 KK |
690 | for (i = 0; i < info->muic_irqs_num; i++) { |
691 | struct max14577_muic_irq *muic_irq = &info->muic_irqs[i]; | |
c2957563 | 692 | int virq = 0; |
962e56bf CC |
693 | |
694 | virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq); | |
369afd4b | 695 | if (virq <= 0) |
962e56bf CC |
696 | return -EINVAL; |
697 | muic_irq->virq = virq; | |
698 | ||
699 | ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, | |
700 | max14577_muic_irq_handler, | |
701 | IRQF_NO_SUSPEND, | |
702 | muic_irq->name, info); | |
703 | if (ret) { | |
704 | dev_err(&pdev->dev, | |
34825e51 | 705 | "failed: irq request (IRQ: %d, error :%d)\n", |
962e56bf CC |
706 | muic_irq->irq, ret); |
707 | return ret; | |
708 | } | |
709 | } | |
710 | ||
711 | /* Initialize extcon device */ | |
0604002c CC |
712 | info->edev = devm_extcon_dev_allocate(&pdev->dev, |
713 | max14577_extcon_cable); | |
714 | if (IS_ERR(info->edev)) { | |
962e56bf | 715 | dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); |
4e984d83 | 716 | return PTR_ERR(info->edev); |
962e56bf | 717 | } |
4005da5c | 718 | |
14dbd549 | 719 | ret = devm_extcon_dev_register(&pdev->dev, info->edev); |
962e56bf CC |
720 | if (ret) { |
721 | dev_err(&pdev->dev, "failed to register extcon device\n"); | |
722 | return ret; | |
723 | } | |
724 | ||
725 | /* Default h/w line path */ | |
726 | info->path_usb = CTRL1_SW_USB; | |
727 | info->path_uart = CTRL1_SW_UART; | |
728 | delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); | |
729 | ||
5a196c29 MS |
730 | /* Set initial path for UART when JIG is connected to get serial logs */ |
731 | ret = max14577_bulk_read(info->max14577->regmap, | |
732 | MAX14577_MUIC_REG_STATUS1, info->status, 2); | |
733 | if (ret) { | |
734 | dev_err(info->dev, "Cannot read STATUS registers\n"); | |
735 | return ret; | |
736 | } | |
737 | cable_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC, | |
738 | &attached); | |
739 | if (attached && cable_type == MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF) | |
740 | max14577_muic_set_path(info, info->path_uart, true); | |
962e56bf CC |
741 | |
742 | /* Check revision number of MUIC device*/ | |
743 | ret = max14577_read_reg(info->max14577->regmap, | |
744 | MAX14577_REG_DEVICEID, &id); | |
745 | if (ret < 0) { | |
746 | dev_err(&pdev->dev, "failed to read revision number\n"); | |
14dbd549 | 747 | return ret; |
962e56bf CC |
748 | } |
749 | dev_info(info->dev, "device ID : 0x%x\n", id); | |
750 | ||
751 | /* Set ADC debounce time */ | |
752 | max14577_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); | |
753 | ||
754 | /* | |
755 | * Detect accessory after completing the initialization of platform | |
756 | * | |
757 | * - Use delayed workqueue to detect cable state and then | |
758 | * notify cable state to notifiee/platform through uevent. | |
759 | * After completing the booting of platform, the extcon provider | |
760 | * driver should notify cable state to upper layer. | |
761 | */ | |
762 | INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq); | |
12adef5b | 763 | queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, |
962e56bf | 764 | delay_jiffies); |
962e56bf CC |
765 | |
766 | return ret; | |
962e56bf CC |
767 | } |
768 | ||
769 | static int max14577_muic_remove(struct platform_device *pdev) | |
770 | { | |
771 | struct max14577_muic_info *info = platform_get_drvdata(pdev); | |
772 | ||
773 | cancel_work_sync(&info->irq_work); | |
962e56bf CC |
774 | |
775 | return 0; | |
776 | } | |
777 | ||
4706a525 KK |
778 | static const struct platform_device_id max14577_muic_id[] = { |
779 | { "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, }, | |
780 | { "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, }, | |
781 | { } | |
782 | }; | |
783 | MODULE_DEVICE_TABLE(platform, max14577_muic_id); | |
784 | ||
3d6954dd MS |
785 | static const struct of_device_id of_max14577_muic_dt_match[] = { |
786 | { .compatible = "maxim,max14577-muic", | |
787 | .data = (void *)MAXIM_DEVICE_TYPE_MAX14577, }, | |
788 | { .compatible = "maxim,max77836-muic", | |
789 | .data = (void *)MAXIM_DEVICE_TYPE_MAX77836, }, | |
790 | { }, | |
791 | }; | |
792 | MODULE_DEVICE_TABLE(of, of_max14577_muic_dt_match); | |
793 | ||
962e56bf CC |
794 | static struct platform_driver max14577_muic_driver = { |
795 | .driver = { | |
4005da5c | 796 | .name = "max14577-muic", |
3d6954dd | 797 | .of_match_table = of_max14577_muic_dt_match, |
962e56bf CC |
798 | }, |
799 | .probe = max14577_muic_probe, | |
800 | .remove = max14577_muic_remove, | |
4706a525 | 801 | .id_table = max14577_muic_id, |
962e56bf CC |
802 | }; |
803 | ||
804 | module_platform_driver(max14577_muic_driver); | |
805 | ||
4706a525 | 806 | MODULE_DESCRIPTION("Maxim 14577/77836 Extcon driver"); |
e5b07e55 | 807 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <krzk@kernel.org>"); |
962e56bf CC |
808 | MODULE_LICENSE("GPL"); |
809 | MODULE_ALIAS("platform:extcon-max14577"); |