2 * extcon-arizona.c - Extcon driver Wolfson Arizona devices
4 * Copyright (C) 2012 Wolfson Microelectronics plc
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/i2c.h>
20 #include <linux/slab.h>
21 #include <linux/interrupt.h>
22 #include <linux/err.h>
23 #include <linux/gpio.h>
24 #include <linux/input.h>
25 #include <linux/platform_device.h>
26 #include <linux/pm_runtime.h>
27 #include <linux/regulator/consumer.h>
28 #include <linux/extcon.h>
30 #include <linux/mfd/arizona/core.h>
31 #include <linux/mfd/arizona/pdata.h>
32 #include <linux/mfd/arizona/registers.h>
34 #define ARIZONA_NUM_BUTTONS 6
36 struct arizona_extcon_info
{
38 struct arizona
*arizona
;
40 struct regulator
*micvdd
;
41 struct input_dev
*input
;
44 const struct arizona_micd_config
*micd_modes
;
53 struct extcon_dev edev
;
56 static const struct arizona_micd_config micd_default_modes
[] = {
57 { ARIZONA_ACCDET_SRC
, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT
, 0 },
58 { 0, 2 << ARIZONA_MICD_BIAS_SRC_SHIFT
, 1 },
64 } arizona_lvl_to_key
[ARIZONA_NUM_BUTTONS
] = {
73 #define ARIZONA_CABLE_MECHANICAL 0
74 #define ARIZONA_CABLE_MICROPHONE 1
75 #define ARIZONA_CABLE_HEADPHONE 2
77 static const char *arizona_cable
[] = {
84 static void arizona_extcon_set_mode(struct arizona_extcon_info
*info
, int mode
)
86 struct arizona
*arizona
= info
->arizona
;
88 gpio_set_value_cansleep(arizona
->pdata
.micd_pol_gpio
,
89 info
->micd_modes
[mode
].gpio
);
90 regmap_update_bits(arizona
->regmap
, ARIZONA_MIC_DETECT_1
,
91 ARIZONA_MICD_BIAS_SRC_MASK
,
92 info
->micd_modes
[mode
].bias
);
93 regmap_update_bits(arizona
->regmap
, ARIZONA_ACCESSORY_DETECT_MODE_1
,
94 ARIZONA_ACCDET_SRC
, info
->micd_modes
[mode
].src
);
96 info
->micd_mode
= mode
;
98 dev_dbg(arizona
->dev
, "Set jack polarity to %d\n", mode
);
101 static void arizona_start_mic(struct arizona_extcon_info
*info
)
103 struct arizona
*arizona
= info
->arizona
;
107 info
->detecting
= true;
109 info
->jack_flips
= 0;
111 /* Microphone detection can't use idle mode */
112 pm_runtime_get(info
->dev
);
114 ret
= regulator_enable(info
->micvdd
);
116 dev_err(arizona
->dev
, "Failed to enable MICVDD: %d\n",
120 if (info
->micd_reva
) {
121 regmap_write(arizona
->regmap
, 0x80, 0x3);
122 regmap_write(arizona
->regmap
, 0x294, 0);
123 regmap_write(arizona
->regmap
, 0x80, 0x0);
126 regmap_update_bits_check(arizona
->regmap
, ARIZONA_MIC_DETECT_1
,
127 ARIZONA_MICD_ENA
, ARIZONA_MICD_ENA
,
130 regulator_disable(info
->micvdd
);
131 pm_runtime_put_autosuspend(info
->dev
);
135 static void arizona_stop_mic(struct arizona_extcon_info
*info
)
137 struct arizona
*arizona
= info
->arizona
;
140 regmap_update_bits_check(arizona
->regmap
, ARIZONA_MIC_DETECT_1
,
144 if (info
->micd_reva
) {
145 regmap_write(arizona
->regmap
, 0x80, 0x3);
146 regmap_write(arizona
->regmap
, 0x294, 2);
147 regmap_write(arizona
->regmap
, 0x80, 0x0);
151 regulator_disable(info
->micvdd
);
152 pm_runtime_mark_last_busy(info
->dev
);
153 pm_runtime_put_autosuspend(info
->dev
);
157 static irqreturn_t
arizona_micdet(int irq
, void *data
)
159 struct arizona_extcon_info
*info
= data
;
160 struct arizona
*arizona
= info
->arizona
;
161 unsigned int val
, lvl
;
164 mutex_lock(&info
->lock
);
166 ret
= regmap_read(arizona
->regmap
, ARIZONA_MIC_DETECT_3
, &val
);
168 dev_err(arizona
->dev
, "Failed to read MICDET: %d\n", ret
);
172 dev_dbg(arizona
->dev
, "MICDET: %x\n", val
);
174 if (!(val
& ARIZONA_MICD_VALID
)) {
175 dev_warn(arizona
->dev
, "Microphone detection state invalid\n");
176 mutex_unlock(&info
->lock
);
180 /* Due to jack detect this should never happen */
181 if (!(val
& ARIZONA_MICD_STS
)) {
182 dev_warn(arizona
->dev
, "Detected open circuit\n");
183 info
->detecting
= false;
187 /* If we got a high impedence we should have a headset, report it. */
188 if (info
->detecting
&& (val
& 0x400)) {
189 ret
= extcon_update_state(&info
->edev
,
190 1 << ARIZONA_CABLE_MICROPHONE
|
191 1 << ARIZONA_CABLE_HEADPHONE
,
192 1 << ARIZONA_CABLE_MICROPHONE
|
193 1 << ARIZONA_CABLE_HEADPHONE
);
196 dev_err(arizona
->dev
, "Headset report failed: %d\n",
200 info
->detecting
= false;
204 /* If we detected a lower impedence during initial startup
205 * then we probably have the wrong polarity, flip it. Don't
206 * do this for the lowest impedences to speed up detection of
207 * plain headphones. If both polarities report a low
208 * impedence then give up and report headphones.
210 if (info
->detecting
&& (val
& 0x3f8)) {
213 if (info
->jack_flips
>= info
->micd_num_modes
) {
214 dev_dbg(arizona
->dev
, "Detected headphone\n");
215 info
->detecting
= false;
216 arizona_stop_mic(info
);
218 ret
= extcon_set_cable_state_(&info
->edev
,
219 ARIZONA_CABLE_HEADPHONE
,
222 dev_err(arizona
->dev
,
223 "Headphone report failed: %d\n",
227 if (info
->micd_mode
== info
->micd_num_modes
)
229 arizona_extcon_set_mode(info
, info
->micd_mode
);
238 * If we're still detecting and we detect a short then we've
239 * got a headphone. Otherwise it's a button press.
243 dev_dbg(arizona
->dev
, "Mic button detected\n");
245 lvl
= val
& ARIZONA_MICD_LVL_MASK
;
246 lvl
>>= ARIZONA_MICD_LVL_SHIFT
;
248 for (i
= 0; i
< ARIZONA_NUM_BUTTONS
; i
++)
249 if (lvl
& arizona_lvl_to_key
[i
].status
)
250 input_report_key(info
->input
,
251 arizona_lvl_to_key
[i
].report
,
253 input_sync(info
->input
);
255 } else if (info
->detecting
) {
256 dev_dbg(arizona
->dev
, "Headphone detected\n");
257 info
->detecting
= false;
258 arizona_stop_mic(info
);
260 ret
= extcon_set_cable_state_(&info
->edev
,
261 ARIZONA_CABLE_HEADPHONE
,
264 dev_err(arizona
->dev
,
265 "Headphone report failed: %d\n",
268 dev_warn(arizona
->dev
, "Button with no mic: %x\n",
272 dev_dbg(arizona
->dev
, "Mic button released\n");
273 for (i
= 0; i
< ARIZONA_NUM_BUTTONS
; i
++)
274 input_report_key(info
->input
,
275 arizona_lvl_to_key
[i
].report
, 0);
276 input_sync(info
->input
);
280 pm_runtime_mark_last_busy(info
->dev
);
281 mutex_unlock(&info
->lock
);
286 static irqreturn_t
arizona_jackdet(int irq
, void *data
)
288 struct arizona_extcon_info
*info
= data
;
289 struct arizona
*arizona
= info
->arizona
;
293 pm_runtime_get_sync(info
->dev
);
295 mutex_lock(&info
->lock
);
297 ret
= regmap_read(arizona
->regmap
, ARIZONA_AOD_IRQ_RAW_STATUS
, &val
);
299 dev_err(arizona
->dev
, "Failed to read jackdet status: %d\n",
301 mutex_unlock(&info
->lock
);
302 pm_runtime_put_autosuspend(info
->dev
);
306 if (val
& ARIZONA_JD1_STS
) {
307 dev_dbg(arizona
->dev
, "Detected jack\n");
308 ret
= extcon_set_cable_state_(&info
->edev
,
309 ARIZONA_CABLE_MECHANICAL
, true);
312 dev_err(arizona
->dev
, "Mechanical report failed: %d\n",
315 arizona_start_mic(info
);
317 dev_dbg(arizona
->dev
, "Detected jack removal\n");
319 arizona_stop_mic(info
);
321 for (i
= 0; i
< ARIZONA_NUM_BUTTONS
; i
++)
322 input_report_key(info
->input
,
323 arizona_lvl_to_key
[i
].report
, 0);
324 input_sync(info
->input
);
326 ret
= extcon_update_state(&info
->edev
, 0xffffffff, 0);
328 dev_err(arizona
->dev
, "Removal report failed: %d\n",
332 mutex_unlock(&info
->lock
);
334 pm_runtime_mark_last_busy(info
->dev
);
335 pm_runtime_put_autosuspend(info
->dev
);
340 static int __devinit
arizona_extcon_probe(struct platform_device
*pdev
)
342 struct arizona
*arizona
= dev_get_drvdata(pdev
->dev
.parent
);
343 struct arizona_pdata
*pdata
;
344 struct arizona_extcon_info
*info
;
347 pdata
= dev_get_platdata(arizona
->dev
);
349 info
= devm_kzalloc(&pdev
->dev
, sizeof(*info
), GFP_KERNEL
);
351 dev_err(&pdev
->dev
, "Failed to allocate memory\n");
356 info
->micvdd
= devm_regulator_get(arizona
->dev
, "MICVDD");
357 if (IS_ERR(info
->micvdd
)) {
358 ret
= PTR_ERR(info
->micvdd
);
359 dev_err(arizona
->dev
, "Failed to get MICVDD: %d\n", ret
);
363 mutex_init(&info
->lock
);
364 info
->arizona
= arizona
;
365 info
->dev
= &pdev
->dev
;
366 info
->detecting
= true;
367 platform_set_drvdata(pdev
, info
);
369 switch (arizona
->type
) {
371 switch (arizona
->rev
) {
373 info
->micd_reva
= true;
383 info
->edev
.name
= "Headset Jack";
384 info
->edev
.supported_cable
= arizona_cable
;
386 ret
= extcon_dev_register(&info
->edev
, arizona
->dev
);
388 dev_err(arizona
->dev
, "extcon_dev_register() failed: %d\n",
393 if (pdata
->num_micd_configs
) {
394 info
->micd_modes
= pdata
->micd_configs
;
395 info
->micd_num_modes
= pdata
->num_micd_configs
;
397 info
->micd_modes
= micd_default_modes
;
398 info
->micd_num_modes
= ARRAY_SIZE(micd_default_modes
);
401 if (arizona
->pdata
.micd_pol_gpio
> 0) {
402 if (info
->micd_modes
[0].gpio
)
403 mode
= GPIOF_OUT_INIT_HIGH
;
405 mode
= GPIOF_OUT_INIT_LOW
;
407 ret
= devm_gpio_request_one(&pdev
->dev
,
408 arizona
->pdata
.micd_pol_gpio
,
412 dev_err(arizona
->dev
, "Failed to request GPIO%d: %d\n",
413 arizona
->pdata
.micd_pol_gpio
, ret
);
418 arizona_extcon_set_mode(info
, 0);
420 info
->input
= input_allocate_device();
422 dev_err(arizona
->dev
, "Can't allocate input dev\n");
427 for (i
= 0; i
< ARIZONA_NUM_BUTTONS
; i
++)
428 input_set_capability(info
->input
, EV_KEY
,
429 arizona_lvl_to_key
[i
].report
);
430 info
->input
->name
= "Headset";
431 info
->input
->phys
= "arizona/extcon";
432 info
->input
->dev
.parent
= &pdev
->dev
;
434 pm_runtime_enable(&pdev
->dev
);
435 pm_runtime_idle(&pdev
->dev
);
436 pm_runtime_get_sync(&pdev
->dev
);
438 ret
= arizona_request_irq(arizona
, ARIZONA_IRQ_JD_RISE
,
439 "JACKDET rise", arizona_jackdet
, info
);
441 dev_err(&pdev
->dev
, "Failed to get JACKDET rise IRQ: %d\n",
446 ret
= arizona_set_irq_wake(arizona
, ARIZONA_IRQ_JD_RISE
, 1);
448 dev_err(&pdev
->dev
, "Failed to set JD rise IRQ wake: %d\n",
453 ret
= arizona_request_irq(arizona
, ARIZONA_IRQ_JD_FALL
,
454 "JACKDET fall", arizona_jackdet
, info
);
456 dev_err(&pdev
->dev
, "Failed to get JD fall IRQ: %d\n", ret
);
460 ret
= arizona_set_irq_wake(arizona
, ARIZONA_IRQ_JD_FALL
, 1);
462 dev_err(&pdev
->dev
, "Failed to set JD fall IRQ wake: %d\n",
467 ret
= arizona_request_irq(arizona
, ARIZONA_IRQ_MICDET
,
468 "MICDET", arizona_micdet
, info
);
470 dev_err(&pdev
->dev
, "Failed to get MICDET IRQ: %d\n", ret
);
474 regmap_update_bits(arizona
->regmap
, ARIZONA_MIC_DETECT_1
,
475 ARIZONA_MICD_BIAS_STARTTIME_MASK
|
476 ARIZONA_MICD_RATE_MASK
,
477 7 << ARIZONA_MICD_BIAS_STARTTIME_SHIFT
|
478 8 << ARIZONA_MICD_RATE_SHIFT
);
480 arizona_clk32k_enable(arizona
);
481 regmap_update_bits(arizona
->regmap
, ARIZONA_JACK_DETECT_DEBOUNCE
,
482 ARIZONA_JD1_DB
, ARIZONA_JD1_DB
);
483 regmap_update_bits(arizona
->regmap
, ARIZONA_JACK_DETECT_ANALOGUE
,
484 ARIZONA_JD1_ENA
, ARIZONA_JD1_ENA
);
486 ret
= regulator_allow_bypass(info
->micvdd
, true);
488 dev_warn(arizona
->dev
, "Failed to set MICVDD to bypass: %d\n",
491 pm_runtime_put(&pdev
->dev
);
493 ret
= input_register_device(info
->input
);
495 dev_err(&pdev
->dev
, "Can't register input device: %d\n", ret
);
502 arizona_free_irq(arizona
, ARIZONA_IRQ_MICDET
, info
);
504 arizona_set_irq_wake(arizona
, ARIZONA_IRQ_JD_FALL
, 0);
506 arizona_free_irq(arizona
, ARIZONA_IRQ_JD_FALL
, info
);
508 arizona_set_irq_wake(arizona
, ARIZONA_IRQ_JD_RISE
, 0);
510 arizona_free_irq(arizona
, ARIZONA_IRQ_JD_RISE
, info
);
512 input_free_device(info
->input
);
514 pm_runtime_disable(&pdev
->dev
);
515 extcon_dev_unregister(&info
->edev
);
520 static int __devexit
arizona_extcon_remove(struct platform_device
*pdev
)
522 struct arizona_extcon_info
*info
= platform_get_drvdata(pdev
);
523 struct arizona
*arizona
= info
->arizona
;
525 pm_runtime_disable(&pdev
->dev
);
527 arizona_set_irq_wake(arizona
, ARIZONA_IRQ_JD_RISE
, 0);
528 arizona_set_irq_wake(arizona
, ARIZONA_IRQ_JD_FALL
, 0);
529 arizona_free_irq(arizona
, ARIZONA_IRQ_MICDET
, info
);
530 arizona_free_irq(arizona
, ARIZONA_IRQ_JD_RISE
, info
);
531 arizona_free_irq(arizona
, ARIZONA_IRQ_JD_FALL
, info
);
532 regmap_update_bits(arizona
->regmap
, ARIZONA_JACK_DETECT_ANALOGUE
,
534 arizona_clk32k_disable(arizona
);
535 input_unregister_device(info
->input
);
536 extcon_dev_unregister(&info
->edev
);
541 static struct platform_driver arizona_extcon_driver
= {
543 .name
= "arizona-extcon",
544 .owner
= THIS_MODULE
,
546 .probe
= arizona_extcon_probe
,
547 .remove
= __devexit_p(arizona_extcon_remove
),
550 module_platform_driver(arizona_extcon_driver
);
552 MODULE_DESCRIPTION("Arizona Extcon driver");
553 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
554 MODULE_LICENSE("GPL");
555 MODULE_ALIAS("platform:extcon-arizona");