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db1b9037 CC |
1 | /* |
2 | * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC | |
3 | * | |
4 | * Copyright (C) 2012 Samsung Electrnoics | |
5 | * Chanwoo Choi <cw00.choi@samsung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | ||
18 | #include <linux/kernel.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/i2c.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/err.h> | |
24 | #include <linux/platform_device.h> | |
25 | #include <linux/mfd/max77693.h> | |
26 | #include <linux/mfd/max77693-private.h> | |
27 | #include <linux/extcon.h> | |
28 | #include <linux/regmap.h> | |
29 | #include <linux/irqdomain.h> | |
30 | ||
31 | #define DEV_NAME "max77693-muic" | |
32 | ||
33 | /* MAX77693 MUIC - STATUS1~3 Register */ | |
34 | #define STATUS1_ADC_SHIFT (0) | |
35 | #define STATUS1_ADCLOW_SHIFT (5) | |
36 | #define STATUS1_ADCERR_SHIFT (6) | |
37 | #define STATUS1_ADC1K_SHIFT (7) | |
38 | #define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT) | |
39 | #define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT) | |
40 | #define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT) | |
41 | #define STATUS1_ADC1K_MASK (0x1 << STATUS1_ADC1K_SHIFT) | |
42 | ||
43 | #define STATUS2_CHGTYP_SHIFT (0) | |
44 | #define STATUS2_CHGDETRUN_SHIFT (3) | |
45 | #define STATUS2_DCDTMR_SHIFT (4) | |
46 | #define STATUS2_DXOVP_SHIFT (5) | |
47 | #define STATUS2_VBVOLT_SHIFT (6) | |
48 | #define STATUS2_VIDRM_SHIFT (7) | |
49 | #define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT) | |
50 | #define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT) | |
51 | #define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT) | |
52 | #define STATUS2_DXOVP_MASK (0x1 << STATUS2_DXOVP_SHIFT) | |
53 | #define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT) | |
54 | #define STATUS2_VIDRM_MASK (0x1 << STATUS2_VIDRM_SHIFT) | |
55 | ||
56 | #define STATUS3_OVP_SHIFT (2) | |
57 | #define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT) | |
58 | ||
59 | /* MAX77693 CDETCTRL1~2 register */ | |
60 | #define CDETCTRL1_CHGDETEN_SHIFT (0) | |
61 | #define CDETCTRL1_CHGTYPMAN_SHIFT (1) | |
62 | #define CDETCTRL1_DCDEN_SHIFT (2) | |
63 | #define CDETCTRL1_DCD2SCT_SHIFT (3) | |
64 | #define CDETCTRL1_CDDELAY_SHIFT (4) | |
65 | #define CDETCTRL1_DCDCPL_SHIFT (5) | |
66 | #define CDETCTRL1_CDPDET_SHIFT (7) | |
67 | #define CDETCTRL1_CHGDETEN_MASK (0x1 << CDETCTRL1_CHGDETEN_SHIFT) | |
68 | #define CDETCTRL1_CHGTYPMAN_MASK (0x1 << CDETCTRL1_CHGTYPMAN_SHIFT) | |
69 | #define CDETCTRL1_DCDEN_MASK (0x1 << CDETCTRL1_DCDEN_SHIFT) | |
70 | #define CDETCTRL1_DCD2SCT_MASK (0x1 << CDETCTRL1_DCD2SCT_SHIFT) | |
71 | #define CDETCTRL1_CDDELAY_MASK (0x1 << CDETCTRL1_CDDELAY_SHIFT) | |
72 | #define CDETCTRL1_DCDCPL_MASK (0x1 << CDETCTRL1_DCDCPL_SHIFT) | |
73 | #define CDETCTRL1_CDPDET_MASK (0x1 << CDETCTRL1_CDPDET_SHIFT) | |
74 | ||
75 | #define CDETCTRL2_VIDRMEN_SHIFT (1) | |
76 | #define CDETCTRL2_DXOVPEN_SHIFT (3) | |
77 | #define CDETCTRL2_VIDRMEN_MASK (0x1 << CDETCTRL2_VIDRMEN_SHIFT) | |
78 | #define CDETCTRL2_DXOVPEN_MASK (0x1 << CDETCTRL2_DXOVPEN_SHIFT) | |
79 | ||
80 | /* MAX77693 MUIC - CONTROL1~3 register */ | |
81 | #define COMN1SW_SHIFT (0) | |
82 | #define COMP2SW_SHIFT (3) | |
83 | #define COMN1SW_MASK (0x7 << COMN1SW_SHIFT) | |
84 | #define COMP2SW_MASK (0x7 << COMP2SW_SHIFT) | |
85 | #define COMP_SW_MASK (COMP2SW_MASK | COMN1SW_MASK) | |
86 | #define CONTROL1_SW_USB ((1 << COMP2SW_SHIFT) \ | |
87 | | (1 << COMN1SW_SHIFT)) | |
88 | #define CONTROL1_SW_AUDIO ((2 << COMP2SW_SHIFT) \ | |
89 | | (2 << COMN1SW_SHIFT)) | |
90 | #define CONTROL1_SW_UART ((3 << COMP2SW_SHIFT) \ | |
91 | | (3 << COMN1SW_SHIFT)) | |
92 | #define CONTROL1_SW_OPEN ((0 << COMP2SW_SHIFT) \ | |
93 | | (0 << COMN1SW_SHIFT)) | |
94 | ||
95 | #define CONTROL2_LOWPWR_SHIFT (0) | |
96 | #define CONTROL2_ADCEN_SHIFT (1) | |
97 | #define CONTROL2_CPEN_SHIFT (2) | |
98 | #define CONTROL2_SFOUTASRT_SHIFT (3) | |
99 | #define CONTROL2_SFOUTORD_SHIFT (4) | |
100 | #define CONTROL2_ACCDET_SHIFT (5) | |
101 | #define CONTROL2_USBCPINT_SHIFT (6) | |
102 | #define CONTROL2_RCPS_SHIFT (7) | |
103 | #define CONTROL2_LOWPWR_MASK (0x1 << CONTROL2_LOWPWR_SHIFT) | |
104 | #define CONTROL2_ADCEN_MASK (0x1 << CONTROL2_ADCEN_SHIFT) | |
105 | #define CONTROL2_CPEN_MASK (0x1 << CONTROL2_CPEN_SHIFT) | |
106 | #define CONTROL2_SFOUTASRT_MASK (0x1 << CONTROL2_SFOUTASRT_SHIFT) | |
107 | #define CONTROL2_SFOUTORD_MASK (0x1 << CONTROL2_SFOUTORD_SHIFT) | |
108 | #define CONTROL2_ACCDET_MASK (0x1 << CONTROL2_ACCDET_SHIFT) | |
109 | #define CONTROL2_USBCPINT_MASK (0x1 << CONTROL2_USBCPINT_SHIFT) | |
110 | #define CONTROL2_RCPS_MASK (0x1 << CONTROL2_RCPS_SHIFT) | |
111 | ||
112 | #define CONTROL3_JIGSET_SHIFT (0) | |
113 | #define CONTROL3_BTLDSET_SHIFT (2) | |
114 | #define CONTROL3_ADCDBSET_SHIFT (4) | |
115 | #define CONTROL3_JIGSET_MASK (0x3 << CONTROL3_JIGSET_SHIFT) | |
116 | #define CONTROL3_BTLDSET_MASK (0x3 << CONTROL3_BTLDSET_SHIFT) | |
117 | #define CONTROL3_ADCDBSET_MASK (0x3 << CONTROL3_ADCDBSET_SHIFT) | |
118 | ||
119 | enum max77693_muic_adc_debounce_time { | |
120 | ADC_DEBOUNCE_TIME_5MS = 0, | |
121 | ADC_DEBOUNCE_TIME_10MS, | |
122 | ADC_DEBOUNCE_TIME_25MS, | |
123 | ADC_DEBOUNCE_TIME_38_62MS, | |
124 | }; | |
125 | ||
126 | struct max77693_muic_info { | |
127 | struct device *dev; | |
128 | struct max77693_dev *max77693; | |
129 | struct extcon_dev *edev; | |
130 | int prev_adc; | |
131 | int prev_adc_gnd; | |
132 | int prev_chg_type; | |
133 | u8 status[2]; | |
134 | ||
135 | int irq; | |
136 | struct work_struct irq_work; | |
137 | struct mutex mutex; | |
138 | }; | |
139 | ||
140 | enum max77693_muic_charger_type { | |
141 | MAX77693_CHARGER_TYPE_NONE = 0, | |
142 | MAX77693_CHARGER_TYPE_USB, | |
143 | MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT, | |
144 | MAX77693_CHARGER_TYPE_DEDICATED_CHG, | |
145 | MAX77693_CHARGER_TYPE_APPLE_500MA, | |
146 | MAX77693_CHARGER_TYPE_APPLE_1A_2A, | |
147 | MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7, | |
148 | }; | |
149 | ||
150 | /** | |
151 | * struct max77693_muic_irq | |
152 | * @irq: the index of irq list of MUIC device. | |
153 | * @name: the name of irq. | |
154 | * @virq: the virtual irq to use irq domain | |
155 | */ | |
156 | struct max77693_muic_irq { | |
157 | unsigned int irq; | |
158 | const char *name; | |
159 | unsigned int virq; | |
160 | }; | |
161 | ||
162 | static struct max77693_muic_irq muic_irqs[] = { | |
163 | { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" }, | |
164 | { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" }, | |
165 | { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" }, | |
166 | { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" }, | |
167 | { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, | |
168 | { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" }, | |
169 | { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, | |
170 | { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" }, | |
171 | { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, | |
172 | { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" }, | |
173 | { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" }, | |
174 | { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" }, | |
175 | { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" }, | |
176 | { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" }, | |
177 | { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" }, | |
178 | { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" }, | |
179 | }; | |
180 | ||
181 | /* Define supported accessory type */ | |
182 | enum max77693_muic_acc_type { | |
183 | MAX77693_MUIC_ADC_GROUND = 0x0, | |
184 | MAX77693_MUIC_ADC_SEND_END_BUTTON, | |
185 | MAX77693_MUIC_ADC_REMOTE_S1_BUTTON, | |
186 | MAX77693_MUIC_ADC_REMOTE_S2_BUTTON, | |
187 | MAX77693_MUIC_ADC_REMOTE_S3_BUTTON, | |
188 | MAX77693_MUIC_ADC_REMOTE_S4_BUTTON, | |
189 | MAX77693_MUIC_ADC_REMOTE_S5_BUTTON, | |
190 | MAX77693_MUIC_ADC_REMOTE_S6_BUTTON, | |
191 | MAX77693_MUIC_ADC_REMOTE_S7_BUTTON, | |
192 | MAX77693_MUIC_ADC_REMOTE_S8_BUTTON, | |
193 | MAX77693_MUIC_ADC_REMOTE_S9_BUTTON, | |
194 | MAX77693_MUIC_ADC_REMOTE_S10_BUTTON, | |
195 | MAX77693_MUIC_ADC_REMOTE_S11_BUTTON, | |
196 | MAX77693_MUIC_ADC_REMOTE_S12_BUTTON, | |
197 | MAX77693_MUIC_ADC_RESERVED_ACC_1, | |
198 | MAX77693_MUIC_ADC_RESERVED_ACC_2, | |
199 | MAX77693_MUIC_ADC_RESERVED_ACC_3, | |
200 | MAX77693_MUIC_ADC_RESERVED_ACC_4, | |
201 | MAX77693_MUIC_ADC_RESERVED_ACC_5, | |
202 | MAX77693_MUIC_ADC_CEA936_AUDIO, | |
203 | MAX77693_MUIC_ADC_PHONE_POWERED_DEV, | |
204 | MAX77693_MUIC_ADC_TTY_CONVERTER, | |
205 | MAX77693_MUIC_ADC_UART_CABLE, | |
206 | MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG, | |
207 | MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF, | |
208 | MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON, | |
209 | MAX77693_MUIC_ADC_AV_CABLE_NOLOAD, | |
210 | MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG, | |
211 | MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF, | |
212 | MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON, | |
213 | MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE, | |
214 | MAX77693_MUIC_ADC_OPEN, | |
215 | ||
216 | /* The below accessories have same ADC value so ADCLow and | |
217 | ADC1K bit is used to separate specific accessory */ | |
218 | MAX77693_MUIC_GND_USB_OTG = 0x100, /* ADC:0x0, ADCLow:0, ADC1K:0 */ | |
219 | MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, ADCLow:1, ADC1K:0 */ | |
220 | MAX77693_MUIC_GND_MHL_CABLE = 0x103, /* ADC:0x0, ADCLow:1, ADC1K:1 */ | |
221 | }; | |
222 | ||
223 | /* MAX77693 MUIC device support below list of accessories(external connector) */ | |
224 | const char *max77693_extcon_cable[] = { | |
225 | [0] = "USB", | |
226 | [1] = "USB-Host", | |
227 | [2] = "TA", | |
228 | [3] = "Fast-charger", | |
229 | [4] = "Slow-charger", | |
230 | [5] = "Charge-downstream", | |
231 | [6] = "MHL", | |
232 | [7] = "Audio-video-load", | |
233 | [8] = "Audio-video-noload", | |
234 | [9] = "JIG", | |
235 | ||
236 | NULL, | |
237 | }; | |
238 | ||
239 | static int max77693_muic_set_debounce_time(struct max77693_muic_info *info, | |
240 | enum max77693_muic_adc_debounce_time time) | |
241 | { | |
242 | int ret = 0; | |
243 | u8 ctrl3; | |
244 | ||
245 | switch (time) { | |
246 | case ADC_DEBOUNCE_TIME_5MS: | |
247 | case ADC_DEBOUNCE_TIME_10MS: | |
248 | case ADC_DEBOUNCE_TIME_25MS: | |
249 | case ADC_DEBOUNCE_TIME_38_62MS: | |
250 | ret = max77693_read_reg(info->max77693->regmap_muic, | |
251 | MAX77693_MUIC_REG_CTRL3, &ctrl3); | |
252 | ctrl3 &= ~CONTROL3_ADCDBSET_MASK; | |
253 | ctrl3 |= (time << CONTROL3_ADCDBSET_SHIFT); | |
254 | ||
255 | ret = max77693_write_reg(info->max77693->regmap_muic, | |
256 | MAX77693_MUIC_REG_CTRL3, ctrl3); | |
257 | if (ret) { | |
258 | dev_err(info->dev, "failed to set ADC debounce time\n"); | |
259 | ret = -EINVAL; | |
260 | } | |
261 | break; | |
262 | default: | |
263 | dev_err(info->dev, "invalid ADC debounce time\n"); | |
264 | ret = -EINVAL; | |
265 | break; | |
266 | } | |
267 | ||
268 | return ret; | |
269 | }; | |
270 | ||
271 | static int max77693_muic_set_path(struct max77693_muic_info *info, | |
272 | u8 val, bool attached) | |
273 | { | |
274 | int ret = 0; | |
275 | u8 ctrl1, ctrl2 = 0; | |
276 | ||
277 | if (attached) | |
278 | ctrl1 = val; | |
279 | else | |
280 | ctrl1 = CONTROL1_SW_OPEN; | |
281 | ||
282 | ret = max77693_update_reg(info->max77693->regmap_muic, | |
283 | MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK); | |
284 | if (ret < 0) { | |
285 | dev_err(info->dev, "failed to update MUIC register\n"); | |
286 | goto out; | |
287 | } | |
288 | ||
289 | if (attached) | |
290 | ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ | |
291 | else | |
292 | ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ | |
293 | ||
294 | ret = max77693_update_reg(info->max77693->regmap_muic, | |
295 | MAX77693_MUIC_REG_CTRL2, ctrl2, | |
296 | CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK); | |
297 | if (ret < 0) { | |
298 | dev_err(info->dev, "failed to update MUIC register\n"); | |
299 | goto out; | |
300 | } | |
301 | ||
302 | dev_info(info->dev, | |
303 | "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", | |
304 | ctrl1, ctrl2, attached ? "attached" : "detached"); | |
305 | out: | |
306 | return ret; | |
307 | } | |
308 | ||
309 | static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info, | |
310 | bool attached) | |
311 | { | |
312 | int ret = 0; | |
313 | int type; | |
314 | int adc, adc1k, adclow; | |
315 | ||
316 | if (attached) { | |
317 | adc = info->status[0] & STATUS1_ADC_MASK; | |
318 | adclow = info->status[0] & STATUS1_ADCLOW_MASK; | |
319 | adclow >>= STATUS1_ADCLOW_SHIFT; | |
320 | adc1k = info->status[0] & STATUS1_ADC1K_MASK; | |
321 | adc1k >>= STATUS1_ADC1K_SHIFT; | |
322 | ||
323 | /** | |
324 | * [0x1][ADCLow][ADC1K] | |
325 | * [0x1 0 0 ] : USB_OTG | |
326 | * [0x1 1 0 ] : Audio Video Cable with load | |
327 | * [0x1 1 1 ] : MHL | |
328 | */ | |
329 | type = ((0x1 << 8) | (adclow << 1) | adc1k); | |
330 | ||
331 | /* Store previous ADC value to handle accessory | |
332 | when accessory will be detached */ | |
333 | info->prev_adc = adc; | |
334 | info->prev_adc_gnd = type; | |
335 | } else | |
336 | type = info->prev_adc_gnd; | |
337 | ||
338 | switch (type) { | |
339 | case MAX77693_MUIC_GND_USB_OTG: | |
340 | /* USB_OTG */ | |
341 | ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached); | |
342 | if (ret < 0) | |
343 | goto out; | |
344 | extcon_set_cable_state(info->edev, "USB-Host", attached); | |
345 | break; | |
346 | case MAX77693_MUIC_GND_AV_CABLE_LOAD: | |
347 | /* Audio Video Cable with load */ | |
348 | ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached); | |
349 | if (ret < 0) | |
350 | goto out; | |
351 | extcon_set_cable_state(info->edev, | |
352 | "Audio-video-load", attached); | |
353 | break; | |
354 | case MAX77693_MUIC_GND_MHL_CABLE: | |
355 | /* MHL */ | |
356 | extcon_set_cable_state(info->edev, "MHL", attached); | |
357 | break; | |
358 | default: | |
359 | dev_err(info->dev, "faild to detect %s accessory\n", | |
360 | attached ? "attached" : "detached"); | |
361 | dev_err(info->dev, "- adc:0x%x, adclow:0x%x, adc1k:0x%x\n", | |
362 | adc, adclow, adc1k); | |
363 | ret = -EINVAL; | |
364 | break; | |
365 | } | |
366 | ||
367 | out: | |
368 | return ret; | |
369 | } | |
370 | ||
371 | static int max77693_muic_adc_handler(struct max77693_muic_info *info, | |
372 | int curr_adc, bool attached) | |
373 | { | |
374 | int ret = 0; | |
375 | int adc; | |
376 | ||
377 | if (attached) { | |
378 | /* Store ADC value to handle accessory | |
379 | when accessory will be detached */ | |
380 | info->prev_adc = curr_adc; | |
381 | adc = curr_adc; | |
382 | } else | |
383 | adc = info->prev_adc; | |
384 | ||
385 | dev_info(info->dev, | |
386 | "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", | |
387 | attached ? "attached" : "detached", curr_adc, info->prev_adc); | |
388 | ||
389 | switch (adc) { | |
390 | case MAX77693_MUIC_ADC_GROUND: | |
391 | /* USB_OTG/MHL/Audio */ | |
392 | max77693_muic_adc_ground_handler(info, attached); | |
393 | break; | |
394 | case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: | |
395 | case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: | |
396 | /* USB */ | |
397 | ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached); | |
398 | if (ret < 0) | |
399 | goto out; | |
400 | extcon_set_cable_state(info->edev, "USB", attached); | |
401 | break; | |
402 | case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: | |
403 | case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: | |
404 | /* JIG */ | |
405 | ret = max77693_muic_set_path(info, CONTROL1_SW_UART, attached); | |
406 | if (ret < 0) | |
407 | goto out; | |
408 | extcon_set_cable_state(info->edev, "JIG", attached); | |
409 | break; | |
410 | case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: | |
411 | /* Audio Video cable with no-load */ | |
412 | ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached); | |
413 | if (ret < 0) | |
414 | goto out; | |
415 | extcon_set_cable_state(info->edev, | |
416 | "Audio-video-noload", attached); | |
417 | break; | |
418 | case MAX77693_MUIC_ADC_SEND_END_BUTTON: | |
419 | case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON: | |
420 | case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON: | |
421 | case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: | |
422 | case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON: | |
423 | case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON: | |
424 | case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON: | |
425 | case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: | |
426 | case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON: | |
427 | case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: | |
428 | case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: | |
429 | case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON: | |
430 | case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: | |
431 | case MAX77693_MUIC_ADC_RESERVED_ACC_1: | |
432 | case MAX77693_MUIC_ADC_RESERVED_ACC_2: | |
433 | case MAX77693_MUIC_ADC_RESERVED_ACC_3: | |
434 | case MAX77693_MUIC_ADC_RESERVED_ACC_4: | |
435 | case MAX77693_MUIC_ADC_RESERVED_ACC_5: | |
436 | case MAX77693_MUIC_ADC_CEA936_AUDIO: | |
437 | case MAX77693_MUIC_ADC_PHONE_POWERED_DEV: | |
438 | case MAX77693_MUIC_ADC_TTY_CONVERTER: | |
439 | case MAX77693_MUIC_ADC_UART_CABLE: | |
440 | case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG: | |
441 | case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: | |
442 | case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG: | |
443 | /* This accessory isn't used in general case if it is specially | |
444 | needed to detect additional accessory, should implement | |
445 | proper operation when this accessory is attached/detached. */ | |
446 | dev_info(info->dev, | |
447 | "accessory is %s but it isn't used (adc:0x%x)\n", | |
448 | attached ? "attached" : "detached", adc); | |
449 | goto out; | |
450 | default: | |
451 | dev_err(info->dev, | |
452 | "failed to detect %s accessory (adc:0x%x)\n", | |
453 | attached ? "attached" : "detached", adc); | |
454 | ret = -EINVAL; | |
455 | goto out; | |
456 | } | |
457 | ||
458 | out: | |
459 | return ret; | |
460 | } | |
461 | ||
462 | static int max77693_muic_chg_handler(struct max77693_muic_info *info, | |
463 | int curr_chg_type, bool attached) | |
464 | { | |
465 | int ret = 0; | |
466 | int chg_type; | |
467 | ||
468 | if (attached) { | |
469 | /* Store previous charger type to control | |
470 | when charger accessory will be detached */ | |
471 | info->prev_chg_type = curr_chg_type; | |
472 | chg_type = curr_chg_type; | |
473 | } else | |
474 | chg_type = info->prev_chg_type; | |
475 | ||
476 | dev_info(info->dev, | |
477 | "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", | |
478 | attached ? "attached" : "detached", | |
479 | curr_chg_type, info->prev_chg_type); | |
480 | ||
481 | switch (chg_type) { | |
482 | case MAX77693_CHARGER_TYPE_USB: | |
483 | ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached); | |
484 | if (ret < 0) | |
485 | goto out; | |
486 | extcon_set_cable_state(info->edev, "USB", attached); | |
487 | break; | |
488 | case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT: | |
489 | extcon_set_cable_state(info->edev, | |
490 | "Charge-downstream", attached); | |
491 | break; | |
492 | case MAX77693_CHARGER_TYPE_DEDICATED_CHG: | |
493 | extcon_set_cable_state(info->edev, "TA", attached); | |
494 | break; | |
495 | case MAX77693_CHARGER_TYPE_APPLE_500MA: | |
496 | extcon_set_cable_state(info->edev, "Slow-charger", attached); | |
497 | break; | |
498 | case MAX77693_CHARGER_TYPE_APPLE_1A_2A: | |
499 | extcon_set_cable_state(info->edev, "Fast-charger", attached); | |
500 | break; | |
501 | case MAX77693_CHARGER_TYPE_DEAD_BATTERY: | |
502 | break; | |
503 | default: | |
504 | dev_err(info->dev, | |
505 | "failed to detect %s accessory (chg_type:0x%x)\n", | |
506 | attached ? "attached" : "detached", chg_type); | |
507 | ret = -EINVAL; | |
508 | goto out; | |
509 | } | |
510 | ||
511 | out: | |
512 | return ret; | |
513 | } | |
514 | ||
515 | static void max77693_muic_irq_work(struct work_struct *work) | |
516 | { | |
517 | struct max77693_muic_info *info = container_of(work, | |
518 | struct max77693_muic_info, irq_work); | |
519 | int curr_adc, curr_chg_type; | |
520 | int irq_type = -1; | |
521 | int i, ret = 0; | |
522 | bool attached = true; | |
523 | ||
524 | if (!info->edev) | |
525 | return; | |
526 | ||
527 | mutex_lock(&info->mutex); | |
528 | ||
529 | for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++) | |
530 | if (info->irq == muic_irqs[i].virq) | |
531 | irq_type = muic_irqs[i].irq; | |
532 | ||
533 | ret = max77693_bulk_read(info->max77693->regmap_muic, | |
534 | MAX77693_MUIC_REG_STATUS1, 2, info->status); | |
535 | if (ret) { | |
536 | dev_err(info->dev, "failed to read MUIC register\n"); | |
537 | mutex_unlock(&info->mutex); | |
538 | return; | |
539 | } | |
540 | ||
541 | switch (irq_type) { | |
542 | case MAX77693_MUIC_IRQ_INT1_ADC: | |
543 | case MAX77693_MUIC_IRQ_INT1_ADC_LOW: | |
544 | case MAX77693_MUIC_IRQ_INT1_ADC_ERR: | |
545 | case MAX77693_MUIC_IRQ_INT1_ADC1K: | |
546 | /* Handle all of accessory except for | |
547 | type of charger accessory */ | |
548 | curr_adc = info->status[0] & STATUS1_ADC_MASK; | |
549 | curr_adc >>= STATUS1_ADC_SHIFT; | |
550 | ||
551 | /* Check accossory state which is either detached or attached */ | |
552 | if (curr_adc == MAX77693_MUIC_ADC_OPEN) | |
553 | attached = false; | |
554 | ||
555 | ret = max77693_muic_adc_handler(info, curr_adc, attached); | |
556 | break; | |
557 | case MAX77693_MUIC_IRQ_INT2_CHGTYP: | |
558 | case MAX77693_MUIC_IRQ_INT2_CHGDETREUN: | |
559 | case MAX77693_MUIC_IRQ_INT2_DCDTMR: | |
560 | case MAX77693_MUIC_IRQ_INT2_DXOVP: | |
561 | case MAX77693_MUIC_IRQ_INT2_VBVOLT: | |
562 | case MAX77693_MUIC_IRQ_INT2_VIDRM: | |
563 | /* Handle charger accessory */ | |
564 | curr_chg_type = info->status[1] & STATUS2_CHGTYP_MASK; | |
565 | curr_chg_type >>= STATUS2_CHGTYP_SHIFT; | |
566 | ||
567 | /* Check charger accossory state which | |
568 | is either detached or attached */ | |
569 | if (curr_chg_type == MAX77693_CHARGER_TYPE_NONE) | |
570 | attached = false; | |
571 | ||
572 | ret = max77693_muic_chg_handler(info, curr_chg_type, attached); | |
573 | break; | |
574 | case MAX77693_MUIC_IRQ_INT3_EOC: | |
575 | case MAX77693_MUIC_IRQ_INT3_CGMBC: | |
576 | case MAX77693_MUIC_IRQ_INT3_OVP: | |
577 | case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR: | |
578 | case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED: | |
579 | case MAX77693_MUIC_IRQ_INT3_BAT_DET: | |
580 | break; | |
581 | default: | |
582 | dev_err(info->dev, "muic interrupt: irq %d occurred\n", | |
583 | irq_type); | |
584 | break; | |
585 | } | |
586 | ||
587 | if (ret < 0) | |
588 | dev_err(info->dev, "failed to handle MUIC interrupt\n"); | |
589 | ||
590 | mutex_unlock(&info->mutex); | |
591 | ||
592 | return; | |
593 | } | |
594 | ||
595 | static irqreturn_t max77693_muic_irq_handler(int irq, void *data) | |
596 | { | |
597 | struct max77693_muic_info *info = data; | |
598 | ||
599 | info->irq = irq; | |
600 | schedule_work(&info->irq_work); | |
601 | ||
602 | return IRQ_HANDLED; | |
603 | } | |
604 | ||
605 | static struct regmap_config max77693_muic_regmap_config = { | |
606 | .reg_bits = 8, | |
607 | .val_bits = 8, | |
608 | }; | |
609 | ||
610 | static int max77693_muic_detect_accessory(struct max77693_muic_info *info) | |
611 | { | |
612 | int ret = 0; | |
613 | int adc, chg_type; | |
614 | ||
615 | mutex_lock(&info->mutex); | |
616 | ||
617 | /* Read STATUSx register to detect accessory */ | |
618 | ret = max77693_bulk_read(info->max77693->regmap_muic, | |
619 | MAX77693_MUIC_REG_STATUS1, 2, info->status); | |
620 | if (ret) { | |
621 | dev_err(info->dev, "failed to read MUIC register\n"); | |
622 | mutex_unlock(&info->mutex); | |
623 | return -EINVAL; | |
624 | } | |
625 | ||
626 | adc = info->status[0] & STATUS1_ADC_MASK; | |
627 | adc >>= STATUS1_ADC_SHIFT; | |
628 | ||
629 | if (adc != MAX77693_MUIC_ADC_OPEN) { | |
630 | dev_info(info->dev, | |
631 | "external connector is attached (adc:0x%02x)\n", adc); | |
632 | ||
633 | ret = max77693_muic_adc_handler(info, adc, true); | |
634 | if (ret < 0) | |
635 | dev_err(info->dev, "failed to detect accessory\n"); | |
636 | goto out; | |
637 | } | |
638 | ||
639 | chg_type = info->status[1] & STATUS2_CHGTYP_MASK; | |
640 | chg_type >>= STATUS2_CHGTYP_SHIFT; | |
641 | ||
642 | if (chg_type != MAX77693_CHARGER_TYPE_NONE) { | |
643 | dev_info(info->dev, | |
644 | "external connector is attached (chg_type:0x%x)\n", | |
645 | chg_type); | |
646 | ||
647 | max77693_muic_chg_handler(info, chg_type, true); | |
648 | if (ret < 0) | |
649 | dev_err(info->dev, "failed to detect charger accessory\n"); | |
650 | } | |
651 | ||
652 | out: | |
653 | mutex_unlock(&info->mutex); | |
654 | return ret; | |
655 | } | |
656 | ||
657 | static int __devinit max77693_muic_probe(struct platform_device *pdev) | |
658 | { | |
659 | struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent); | |
660 | struct max77693_muic_info *info; | |
661 | int ret, i; | |
662 | u8 id; | |
663 | ||
664 | info = kzalloc(sizeof(struct max77693_muic_info), GFP_KERNEL); | |
665 | if (!info) { | |
666 | dev_err(&pdev->dev, "failed to allocate memory\n"); | |
667 | ret = -ENOMEM; | |
668 | goto err_kfree; | |
669 | } | |
670 | info->dev = &pdev->dev; | |
671 | info->max77693 = max77693; | |
672 | info->max77693->regmap_muic = regmap_init_i2c(info->max77693->muic, | |
673 | &max77693_muic_regmap_config); | |
674 | if (IS_ERR(info->max77693->regmap_muic)) { | |
675 | ret = PTR_ERR(info->max77693->regmap_muic); | |
676 | dev_err(max77693->dev, | |
677 | "failed to allocate register map: %d\n", ret); | |
678 | goto err_regmap; | |
679 | } | |
680 | platform_set_drvdata(pdev, info); | |
681 | mutex_init(&info->mutex); | |
682 | ||
683 | INIT_WORK(&info->irq_work, max77693_muic_irq_work); | |
684 | ||
685 | /* Support irq domain for MAX77693 MUIC device */ | |
686 | for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) { | |
687 | struct max77693_muic_irq *muic_irq = &muic_irqs[i]; | |
688 | int virq = 0; | |
689 | ||
690 | virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq); | |
691 | if (!virq) | |
692 | goto err_irq; | |
693 | muic_irq->virq = virq; | |
694 | ||
695 | ret = request_threaded_irq(virq, NULL, | |
696 | max77693_muic_irq_handler, | |
697 | 0, muic_irq->name, info); | |
698 | if (ret) { | |
699 | dev_err(&pdev->dev, | |
700 | "failed: irq request (IRQ: %d," | |
701 | " error :%d)\n", | |
702 | muic_irq->irq, ret); | |
703 | ||
704 | for (i = i - 1; i >= 0; i--) | |
705 | free_irq(muic_irq->virq, info); | |
706 | goto err_irq; | |
707 | } | |
708 | } | |
709 | ||
710 | /* Initialize extcon device */ | |
711 | info->edev = kzalloc(sizeof(struct extcon_dev), GFP_KERNEL); | |
712 | if (!info->edev) { | |
713 | dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); | |
714 | ret = -ENOMEM; | |
715 | goto err_irq; | |
716 | } | |
717 | info->edev->name = DEV_NAME; | |
718 | info->edev->supported_cable = max77693_extcon_cable; | |
719 | ret = extcon_dev_register(info->edev, NULL); | |
720 | if (ret) { | |
721 | dev_err(&pdev->dev, "failed to register extcon device\n"); | |
722 | goto err_extcon; | |
723 | } | |
724 | ||
725 | /* Check revision number of MUIC device*/ | |
726 | ret = max77693_read_reg(info->max77693->regmap_muic, | |
727 | MAX77693_MUIC_REG_ID, &id); | |
728 | if (ret < 0) { | |
729 | dev_err(&pdev->dev, "failed to read revision number\n"); | |
730 | goto err_extcon; | |
731 | } | |
732 | dev_info(info->dev, "device ID : 0x%x\n", id); | |
733 | ||
734 | /* Set ADC debounce time */ | |
735 | max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); | |
736 | ||
737 | /* Detect accessory on boot */ | |
738 | max77693_muic_detect_accessory(info); | |
739 | ||
740 | return ret; | |
741 | ||
742 | err_extcon: | |
743 | kfree(info->edev); | |
744 | err_irq: | |
745 | err_regmap: | |
746 | kfree(info); | |
747 | err_kfree: | |
748 | return ret; | |
749 | } | |
750 | ||
751 | static int __devexit max77693_muic_remove(struct platform_device *pdev) | |
752 | { | |
753 | struct max77693_muic_info *info = platform_get_drvdata(pdev); | |
754 | int i; | |
755 | ||
756 | for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) | |
757 | free_irq(muic_irqs[i].virq, info); | |
758 | cancel_work_sync(&info->irq_work); | |
759 | extcon_dev_unregister(info->edev); | |
760 | kfree(info); | |
761 | ||
762 | return 0; | |
763 | } | |
764 | ||
765 | static struct platform_driver max77693_muic_driver = { | |
766 | .driver = { | |
767 | .name = DEV_NAME, | |
768 | .owner = THIS_MODULE, | |
769 | }, | |
770 | .probe = max77693_muic_probe, | |
771 | .remove = __devexit_p(max77693_muic_remove), | |
772 | }; | |
773 | ||
774 | module_platform_driver(max77693_muic_driver); | |
775 | ||
776 | MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver"); | |
777 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); | |
778 | MODULE_LICENSE("GPL"); | |
779 | MODULE_ALIAS("platform:extcon-max77693"); |