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path: root/drivers/extcon/extcon-max77693.c
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Diffstat (limited to 'drivers/extcon/extcon-max77693.c')
-rw-r--r--drivers/extcon/extcon-max77693.c779
1 files changed, 779 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c
new file mode 100644
index 000000000000..920a609b2c35
--- /dev/null
+++ b/drivers/extcon/extcon-max77693.c
@@ -0,0 +1,779 @@
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
119enum 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
126struct 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
140enum 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 */
156struct max77693_muic_irq {
157 unsigned int irq;
158 const char *name;
159 unsigned int virq;
160};
161
162static 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 */
182enum 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) */
224const 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
239static 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
271static 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");
305out:
306 return ret;
307}
308
309static 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
367out:
368 return ret;
369}
370
371static 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
458out:
459 return ret;
460}
461
462static 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
511out:
512 return ret;
513}
514
515static 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
595static 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
605static struct regmap_config max77693_muic_regmap_config = {
606 .reg_bits = 8,
607 .val_bits = 8,
608};
609
610static 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
652out:
653 mutex_unlock(&info->mutex);
654 return ret;
655}
656
657static 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
742err_extcon:
743 kfree(info->edev);
744err_irq:
745err_regmap:
746 kfree(info);
747err_kfree:
748 return ret;
749}
750
751static 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
765static 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
774module_platform_driver(max77693_muic_driver);
775
776MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
777MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
778MODULE_LICENSE("GPL");
779MODULE_ALIAS("platform:extcon-max77693");
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-25 21:04:14 -0400