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/platform_device.h>
25 #include <linux/pm_runtime.h>
26 #include <linux/regulator/consumer.h>
27 #include <linux/extcon.h>
29 #include <linux/mfd/arizona/core.h>
30 #include <linux/mfd/arizona/pdata.h>
31 #include <linux/mfd/arizona/registers.h>
33 struct arizona_extcon_info {
35 struct arizona *arizona;
37 struct regulator *micvdd;
40 const struct arizona_micd_config *micd_modes;
49 struct extcon_dev edev;
52 static const struct arizona_micd_config micd_default_modes[] = {
53 { ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 },
54 { 0, 2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 },
57 #define ARIZONA_CABLE_MECHANICAL "Mechanical"
58 #define ARIZONA_CABLE_HEADPHONE "Headphone"
59 #define ARIZONA_CABLE_HEADSET "Headset"
61 static const char *arizona_cable[] = {
62 ARIZONA_CABLE_MECHANICAL,
63 ARIZONA_CABLE_HEADSET,
64 ARIZONA_CABLE_HEADPHONE,
68 static const u32 arizona_exclusions[] = {
69 0x6, /* Headphone and headset */
73 static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
75 struct arizona *arizona = info->arizona;
77 gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
78 info->micd_modes[mode].gpio);
79 regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
80 ARIZONA_MICD_BIAS_SRC_MASK,
81 info->micd_modes[mode].bias);
82 regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
83 ARIZONA_ACCDET_SRC, info->micd_modes[mode].src);
85 info->micd_mode = mode;
87 dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode);
90 static void arizona_start_mic(struct arizona_extcon_info *info)
92 struct arizona *arizona = info->arizona;
96 info->detecting = true;
100 /* Microphone detection can't use idle mode */
101 pm_runtime_get(info->dev);
103 ret = regulator_enable(info->micvdd);
105 dev_err(arizona->dev, "Failed to enable MICVDD: %d\n",
109 if (info->micd_reva) {
110 regmap_write(arizona->regmap, 0x80, 0x3);
111 regmap_write(arizona->regmap, 0x294, 0);
112 regmap_write(arizona->regmap, 0x80, 0x0);
115 regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
116 ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
119 regulator_disable(info->micvdd);
120 pm_runtime_put_autosuspend(info->dev);
124 static void arizona_stop_mic(struct arizona_extcon_info *info)
126 struct arizona *arizona = info->arizona;
129 regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
133 if (info->micd_reva) {
134 regmap_write(arizona->regmap, 0x80, 0x3);
135 regmap_write(arizona->regmap, 0x294, 2);
136 regmap_write(arizona->regmap, 0x80, 0x0);
140 regulator_disable(info->micvdd);
141 pm_runtime_put_autosuspend(info->dev);
145 static irqreturn_t arizona_micdet(int irq, void *data)
147 struct arizona_extcon_info *info = data;
148 struct arizona *arizona = info->arizona;
152 mutex_lock(&info->lock);
154 ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
156 dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
160 dev_dbg(arizona->dev, "MICDET: %x\n", val);
162 if (!(val & ARIZONA_MICD_VALID)) {
163 dev_warn(arizona->dev, "Microphone detection state invalid\n");
164 mutex_unlock(&info->lock);
168 /* Due to jack detect this should never happen */
169 if (!(val & ARIZONA_MICD_STS)) {
170 dev_warn(arizona->dev, "Detected open circuit\n");
171 info->detecting = false;
175 /* If we got a high impedence we should have a headset, report it. */
176 if (info->detecting && (val & 0x400)) {
177 ret = extcon_set_cable_state(&info->edev,
178 ARIZONA_CABLE_HEADSET, true);
181 dev_err(arizona->dev, "Headset report failed: %d\n",
185 info->detecting = false;
189 /* If we detected a lower impedence during initial startup
190 * then we probably have the wrong polarity, flip it. Don't
191 * do this for the lowest impedences to speed up detection of
192 * plain headphones. If both polarities report a low
193 * impedence then give up and report headphones.
195 if (info->detecting && (val & 0x3f8)) {
198 if (info->jack_flips >= info->micd_num_modes) {
199 dev_dbg(arizona->dev, "Detected headphone\n");
200 info->detecting = false;
201 ret = extcon_set_cable_state(&info->edev,
202 ARIZONA_CABLE_HEADPHONE,
205 dev_err(arizona->dev,
206 "Headphone report failed: %d\n",
210 if (info->micd_mode == info->micd_num_modes)
212 arizona_extcon_set_mode(info, info->micd_mode);
221 * If we're still detecting and we detect a short then we've
222 * got a headphone. Otherwise it's a button press, the
223 * button reporting is stubbed out for now.
227 dev_dbg(arizona->dev, "Mic button detected\n");
229 } else if (info->detecting) {
230 dev_dbg(arizona->dev, "Headphone detected\n");
231 info->detecting = false;
232 arizona_stop_mic(info);
234 ret = extcon_set_cable_state(&info->edev,
235 ARIZONA_CABLE_HEADPHONE,
238 dev_err(arizona->dev,
239 "Headphone report failed: %d\n",
242 dev_warn(arizona->dev, "Button with no mic: %x\n",
246 dev_dbg(arizona->dev, "Mic button released\n");
250 pm_runtime_mark_last_busy(info->dev);
251 mutex_unlock(&info->lock);
256 static irqreturn_t arizona_jackdet(int irq, void *data)
258 struct arizona_extcon_info *info = data;
259 struct arizona *arizona = info->arizona;
263 pm_runtime_get_sync(info->dev);
265 mutex_lock(&info->lock);
267 ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val);
269 dev_err(arizona->dev, "Failed to read jackdet status: %d\n",
271 mutex_unlock(&info->lock);
272 pm_runtime_put_autosuspend(info->dev);
276 if (val & ARIZONA_JD1_STS) {
277 dev_dbg(arizona->dev, "Detected jack\n");
278 ret = extcon_set_cable_state(&info->edev,
279 ARIZONA_CABLE_MECHANICAL, true);
282 dev_err(arizona->dev, "Mechanical report failed: %d\n",
285 arizona_start_mic(info);
287 dev_dbg(arizona->dev, "Detected jack removal\n");
289 arizona_stop_mic(info);
291 ret = extcon_update_state(&info->edev, 0xffffffff, 0);
293 dev_err(arizona->dev, "Removal report failed: %d\n",
297 mutex_unlock(&info->lock);
299 pm_runtime_mark_last_busy(info->dev);
300 pm_runtime_put_autosuspend(info->dev);
305 static int __devinit arizona_extcon_probe(struct platform_device *pdev)
307 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
308 struct arizona_pdata *pdata;
309 struct arizona_extcon_info *info;
312 pdata = dev_get_platdata(arizona->dev);
314 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
316 dev_err(&pdev->dev, "failed to allocate memory\n");
321 info->micvdd = devm_regulator_get(arizona->dev, "MICVDD");
322 if (IS_ERR(info->micvdd)) {
323 ret = PTR_ERR(info->micvdd);
324 dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret);
328 mutex_init(&info->lock);
329 info->arizona = arizona;
330 info->dev = &pdev->dev;
331 info->detecting = true;
332 platform_set_drvdata(pdev, info);
334 switch (arizona->type) {
336 switch (arizona->rev) {
338 info->micd_reva = true;
348 info->edev.name = "Headset Jack";
349 info->edev.supported_cable = arizona_cable;
350 info->edev.mutually_exclusive = arizona_exclusions;
352 ret = extcon_dev_register(&info->edev, arizona->dev);
354 dev_err(arizona->dev, "extcon_dev_regster() failed: %d\n",
359 if (pdata->num_micd_configs) {
360 info->micd_modes = pdata->micd_configs;
361 info->micd_num_modes = pdata->num_micd_configs;
363 info->micd_modes = micd_default_modes;
364 info->micd_num_modes = ARRAY_SIZE(micd_default_modes);
367 if (arizona->pdata.micd_pol_gpio > 0) {
368 if (info->micd_modes[0].gpio)
369 mode = GPIOF_OUT_INIT_HIGH;
371 mode = GPIOF_OUT_INIT_LOW;
373 ret = devm_gpio_request_one(&pdev->dev,
374 arizona->pdata.micd_pol_gpio,
378 dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
379 arizona->pdata.micd_pol_gpio, ret);
384 arizona_extcon_set_mode(info, 0);
386 pm_runtime_enable(&pdev->dev);
387 pm_runtime_idle(&pdev->dev);
388 pm_runtime_get_sync(&pdev->dev);
390 ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_RISE,
391 "JACKDET rise", arizona_jackdet, info);
393 dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
398 ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 1);
400 dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n",
405 ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_FALL,
406 "JACKDET fall", arizona_jackdet, info);
408 dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret);
412 ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 1);
414 dev_err(&pdev->dev, "Failed to set JD fall IRQ wake: %d\n",
419 ret = arizona_request_irq(arizona, ARIZONA_IRQ_MICDET,
420 "MICDET", arizona_micdet, info);
422 dev_err(&pdev->dev, "Failed to get MICDET IRQ: %d\n", ret);
426 regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
427 ARIZONA_MICD_BIAS_STARTTIME_MASK |
428 ARIZONA_MICD_RATE_MASK,
429 7 << ARIZONA_MICD_BIAS_STARTTIME_SHIFT |
430 8 << ARIZONA_MICD_RATE_SHIFT);
432 arizona_clk32k_enable(arizona);
433 regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_DEBOUNCE,
434 ARIZONA_JD1_DB, ARIZONA_JD1_DB);
435 regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
436 ARIZONA_JD1_ENA, ARIZONA_JD1_ENA);
438 pm_runtime_put(&pdev->dev);
443 arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
445 arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
447 arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
449 arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
451 pm_runtime_disable(&pdev->dev);
452 extcon_dev_unregister(&info->edev);
457 static int __devexit arizona_extcon_remove(struct platform_device *pdev)
459 struct arizona_extcon_info *info = platform_get_drvdata(pdev);
460 struct arizona *arizona = info->arizona;
462 pm_runtime_disable(&pdev->dev);
464 arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
465 arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
466 arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
467 arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
468 arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
469 regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
471 arizona_clk32k_disable(arizona);
472 extcon_dev_unregister(&info->edev);
477 static struct platform_driver arizona_extcon_driver = {
479 .name = "arizona-extcon",
480 .owner = THIS_MODULE,
482 .probe = arizona_extcon_probe,
483 .remove = __devexit_p(arizona_extcon_remove),
486 module_platform_driver(arizona_extcon_driver);
488 MODULE_DESCRIPTION("Arizona Extcon driver");
489 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
490 MODULE_LICENSE("GPL");
491 MODULE_ALIAS("platform:extcon-arizona");