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");