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Mark Brownf2c32a82012-06-24 12:09:45 +01001/*
2 * extcon-arizona.c - Extcon driver Wolfson Arizona devices
3 *
4 * Copyright (C) 2012 Wolfson Microelectronics plc
5 *
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.
10 *
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.
15 */
16
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>
28
29#include <linux/mfd/arizona/core.h>
30#include <linux/mfd/arizona/pdata.h>
31#include <linux/mfd/arizona/registers.h>
32
33struct arizona_extcon_info {
34 struct device *dev;
35 struct arizona *arizona;
36 struct mutex lock;
37 struct regulator *micvdd;
38
39 int micd_mode;
40 const struct arizona_micd_config *micd_modes;
41 int micd_num_modes;
42
43 bool micd_reva;
44
45 bool mic;
46 bool detecting;
47 int jack_flips;
48
49 struct extcon_dev edev;
50};
51
52static 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 },
55};
56
Mark Brown325c6422012-06-28 13:08:30 +010057#define ARIZONA_CABLE_MECHANICAL 0
58#define ARIZONA_CABLE_MICROPHONE 1
59#define ARIZONA_CABLE_HEADPHONE 2
Mark Brownf2c32a82012-06-24 12:09:45 +010060
61static const char *arizona_cable[] = {
Mark Brown325c6422012-06-28 13:08:30 +010062 "Mechanical",
63 "Microphone",
64 "Headphone",
Mark Brownf2c32a82012-06-24 12:09:45 +010065 NULL,
66};
67
Mark Brownf2c32a82012-06-24 12:09:45 +010068static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
69{
70 struct arizona *arizona = info->arizona;
71
72 gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
73 info->micd_modes[mode].gpio);
74 regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
75 ARIZONA_MICD_BIAS_SRC_MASK,
76 info->micd_modes[mode].bias);
77 regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
78 ARIZONA_ACCDET_SRC, info->micd_modes[mode].src);
79
80 info->micd_mode = mode;
81
82 dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode);
83}
84
85static void arizona_start_mic(struct arizona_extcon_info *info)
86{
87 struct arizona *arizona = info->arizona;
88 bool change;
89 int ret;
90
91 info->detecting = true;
92 info->mic = false;
93 info->jack_flips = 0;
94
95 /* Microphone detection can't use idle mode */
96 pm_runtime_get(info->dev);
97
98 ret = regulator_enable(info->micvdd);
99 if (ret != 0) {
100 dev_err(arizona->dev, "Failed to enable MICVDD: %d\n",
101 ret);
102 }
103
104 if (info->micd_reva) {
105 regmap_write(arizona->regmap, 0x80, 0x3);
106 regmap_write(arizona->regmap, 0x294, 0);
107 regmap_write(arizona->regmap, 0x80, 0x0);
108 }
109
110 regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
111 ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
112 &change);
113 if (!change) {
114 regulator_disable(info->micvdd);
115 pm_runtime_put_autosuspend(info->dev);
116 }
117}
118
119static void arizona_stop_mic(struct arizona_extcon_info *info)
120{
121 struct arizona *arizona = info->arizona;
122 bool change;
123
124 regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
125 ARIZONA_MICD_ENA, 0,
126 &change);
127
128 if (info->micd_reva) {
129 regmap_write(arizona->regmap, 0x80, 0x3);
130 regmap_write(arizona->regmap, 0x294, 2);
131 regmap_write(arizona->regmap, 0x80, 0x0);
132 }
133
134 if (change) {
135 regulator_disable(info->micvdd);
136 pm_runtime_put_autosuspend(info->dev);
137 }
138}
139
140static irqreturn_t arizona_micdet(int irq, void *data)
141{
142 struct arizona_extcon_info *info = data;
143 struct arizona *arizona = info->arizona;
144 unsigned int val;
145 int ret;
146
147 mutex_lock(&info->lock);
148
149 ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
150 if (ret != 0) {
151 dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
152 return IRQ_NONE;
153 }
154
155 dev_dbg(arizona->dev, "MICDET: %x\n", val);
156
157 if (!(val & ARIZONA_MICD_VALID)) {
158 dev_warn(arizona->dev, "Microphone detection state invalid\n");
159 mutex_unlock(&info->lock);
160 return IRQ_NONE;
161 }
162
163 /* Due to jack detect this should never happen */
164 if (!(val & ARIZONA_MICD_STS)) {
165 dev_warn(arizona->dev, "Detected open circuit\n");
166 info->detecting = false;
167 goto handled;
168 }
169
170 /* If we got a high impedence we should have a headset, report it. */
171 if (info->detecting && (val & 0x400)) {
Mark Brown325c6422012-06-28 13:08:30 +0100172 ret = extcon_update_state(&info->edev,
173 1 << ARIZONA_CABLE_MICROPHONE |
174 1 << ARIZONA_CABLE_HEADPHONE,
175 1 << ARIZONA_CABLE_MICROPHONE |
176 1 << ARIZONA_CABLE_HEADPHONE);
Mark Brownf2c32a82012-06-24 12:09:45 +0100177
178 if (ret != 0)
179 dev_err(arizona->dev, "Headset report failed: %d\n",
180 ret);
181
182 info->mic = true;
183 info->detecting = false;
184 goto handled;
185 }
186
187 /* If we detected a lower impedence during initial startup
188 * then we probably have the wrong polarity, flip it. Don't
189 * do this for the lowest impedences to speed up detection of
190 * plain headphones. If both polarities report a low
191 * impedence then give up and report headphones.
192 */
193 if (info->detecting && (val & 0x3f8)) {
194 info->jack_flips++;
195
196 if (info->jack_flips >= info->micd_num_modes) {
197 dev_dbg(arizona->dev, "Detected headphone\n");
198 info->detecting = false;
Mark Brown9ef2224d2012-06-28 13:08:31 +0100199 arizona_stop_mic(info);
200
Mark Brown325c6422012-06-28 13:08:30 +0100201 ret = extcon_set_cable_state_(&info->edev,
202 ARIZONA_CABLE_HEADPHONE,
203 true);
Mark Brownf2c32a82012-06-24 12:09:45 +0100204 if (ret != 0)
205 dev_err(arizona->dev,
206 "Headphone report failed: %d\n",
207 ret);
208 } else {
209 info->micd_mode++;
210 if (info->micd_mode == info->micd_num_modes)
211 info->micd_mode = 0;
212 arizona_extcon_set_mode(info, info->micd_mode);
213
214 info->jack_flips++;
215 }
216
217 goto handled;
218 }
219
220 /*
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.
224 */
225 if (val & 0x3fc) {
226 if (info->mic) {
227 dev_dbg(arizona->dev, "Mic button detected\n");
228
229 } else if (info->detecting) {
230 dev_dbg(arizona->dev, "Headphone detected\n");
231 info->detecting = false;
232 arizona_stop_mic(info);
233
Mark Brown325c6422012-06-28 13:08:30 +0100234 ret = extcon_set_cable_state_(&info->edev,
235 ARIZONA_CABLE_HEADPHONE,
236 true);
Mark Brownf2c32a82012-06-24 12:09:45 +0100237 if (ret != 0)
238 dev_err(arizona->dev,
239 "Headphone report failed: %d\n",
240 ret);
241 } else {
242 dev_warn(arizona->dev, "Button with no mic: %x\n",
243 val);
244 }
245 } else {
246 dev_dbg(arizona->dev, "Mic button released\n");
247 }
248
249handled:
250 pm_runtime_mark_last_busy(info->dev);
251 mutex_unlock(&info->lock);
252
253 return IRQ_HANDLED;
254}
255
256static irqreturn_t arizona_jackdet(int irq, void *data)
257{
258 struct arizona_extcon_info *info = data;
259 struct arizona *arizona = info->arizona;
260 unsigned int val;
261 int ret;
262
263 pm_runtime_get_sync(info->dev);
264
265 mutex_lock(&info->lock);
266
267 ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val);
268 if (ret != 0) {
269 dev_err(arizona->dev, "Failed to read jackdet status: %d\n",
270 ret);
271 mutex_unlock(&info->lock);
272 pm_runtime_put_autosuspend(info->dev);
273 return IRQ_NONE;
274 }
275
276 if (val & ARIZONA_JD1_STS) {
277 dev_dbg(arizona->dev, "Detected jack\n");
Mark Brown325c6422012-06-28 13:08:30 +0100278 ret = extcon_set_cable_state_(&info->edev,
279 ARIZONA_CABLE_MECHANICAL, true);
Mark Brownf2c32a82012-06-24 12:09:45 +0100280
281 if (ret != 0)
282 dev_err(arizona->dev, "Mechanical report failed: %d\n",
283 ret);
284
285 arizona_start_mic(info);
286 } else {
287 dev_dbg(arizona->dev, "Detected jack removal\n");
288
289 arizona_stop_mic(info);
290
291 ret = extcon_update_state(&info->edev, 0xffffffff, 0);
292 if (ret != 0)
293 dev_err(arizona->dev, "Removal report failed: %d\n",
294 ret);
295 }
296
297 mutex_unlock(&info->lock);
298
299 pm_runtime_mark_last_busy(info->dev);
300 pm_runtime_put_autosuspend(info->dev);
301
302 return IRQ_HANDLED;
303}
304
305static int __devinit arizona_extcon_probe(struct platform_device *pdev)
306{
307 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
308 struct arizona_pdata *pdata;
309 struct arizona_extcon_info *info;
310 int ret, mode;
311
312 pdata = dev_get_platdata(arizona->dev);
313
314 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
315 if (!info) {
316 dev_err(&pdev->dev, "failed to allocate memory\n");
317 ret = -ENOMEM;
318 goto err;
319 }
320
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);
325 goto err;
326 }
327
328 mutex_init(&info->lock);
329 info->arizona = arizona;
330 info->dev = &pdev->dev;
331 info->detecting = true;
332 platform_set_drvdata(pdev, info);
333
334 switch (arizona->type) {
335 case WM5102:
336 switch (arizona->rev) {
337 case 0:
338 info->micd_reva = true;
339 break;
340 default:
341 break;
342 }
343 break;
344 default:
345 break;
346 }
347
348 info->edev.name = "Headset Jack";
349 info->edev.supported_cable = arizona_cable;
Mark Brownf2c32a82012-06-24 12:09:45 +0100350
351 ret = extcon_dev_register(&info->edev, arizona->dev);
352 if (ret < 0) {
353 dev_err(arizona->dev, "extcon_dev_regster() failed: %d\n",
354 ret);
355 goto err;
356 }
357
358 if (pdata->num_micd_configs) {
359 info->micd_modes = pdata->micd_configs;
360 info->micd_num_modes = pdata->num_micd_configs;
361 } else {
362 info->micd_modes = micd_default_modes;
363 info->micd_num_modes = ARRAY_SIZE(micd_default_modes);
364 }
365
366 if (arizona->pdata.micd_pol_gpio > 0) {
367 if (info->micd_modes[0].gpio)
368 mode = GPIOF_OUT_INIT_HIGH;
369 else
370 mode = GPIOF_OUT_INIT_LOW;
371
372 ret = devm_gpio_request_one(&pdev->dev,
373 arizona->pdata.micd_pol_gpio,
374 mode,
375 "MICD polarity");
376 if (ret != 0) {
377 dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
378 arizona->pdata.micd_pol_gpio, ret);
379 goto err_register;
380 }
381 }
382
383 arizona_extcon_set_mode(info, 0);
384
385 pm_runtime_enable(&pdev->dev);
386 pm_runtime_idle(&pdev->dev);
387 pm_runtime_get_sync(&pdev->dev);
388
389 ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_RISE,
390 "JACKDET rise", arizona_jackdet, info);
391 if (ret != 0) {
392 dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
393 ret);
394 goto err_register;
395 }
396
397 ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 1);
398 if (ret != 0) {
399 dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n",
400 ret);
401 goto err_rise;
402 }
403
404 ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_FALL,
405 "JACKDET fall", arizona_jackdet, info);
406 if (ret != 0) {
407 dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret);
408 goto err_rise_wake;
409 }
410
411 ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 1);
412 if (ret != 0) {
413 dev_err(&pdev->dev, "Failed to set JD fall IRQ wake: %d\n",
414 ret);
415 goto err_fall;
416 }
417
418 ret = arizona_request_irq(arizona, ARIZONA_IRQ_MICDET,
419 "MICDET", arizona_micdet, info);
420 if (ret != 0) {
421 dev_err(&pdev->dev, "Failed to get MICDET IRQ: %d\n", ret);
422 goto err_fall_wake;
423 }
424
425 regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
426 ARIZONA_MICD_BIAS_STARTTIME_MASK |
427 ARIZONA_MICD_RATE_MASK,
428 7 << ARIZONA_MICD_BIAS_STARTTIME_SHIFT |
429 8 << ARIZONA_MICD_RATE_SHIFT);
430
431 arizona_clk32k_enable(arizona);
432 regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_DEBOUNCE,
433 ARIZONA_JD1_DB, ARIZONA_JD1_DB);
434 regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
435 ARIZONA_JD1_ENA, ARIZONA_JD1_ENA);
436
437 pm_runtime_put(&pdev->dev);
438
439 return 0;
440
441err_fall_wake:
442 arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
443err_fall:
444 arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
445err_rise_wake:
446 arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
447err_rise:
448 arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
449err_register:
450 pm_runtime_disable(&pdev->dev);
451 extcon_dev_unregister(&info->edev);
452err:
453 return ret;
454}
455
456static int __devexit arizona_extcon_remove(struct platform_device *pdev)
457{
458 struct arizona_extcon_info *info = platform_get_drvdata(pdev);
459 struct arizona *arizona = info->arizona;
460
461 pm_runtime_disable(&pdev->dev);
462
463 arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
464 arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
465 arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
466 arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
467 arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
468 regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
469 ARIZONA_JD1_ENA, 0);
470 arizona_clk32k_disable(arizona);
471 extcon_dev_unregister(&info->edev);
472
473 return 0;
474}
475
476static struct platform_driver arizona_extcon_driver = {
477 .driver = {
478 .name = "arizona-extcon",
479 .owner = THIS_MODULE,
480 },
481 .probe = arizona_extcon_probe,
482 .remove = __devexit_p(arizona_extcon_remove),
483};
484
485module_platform_driver(arizona_extcon_driver);
486
487MODULE_DESCRIPTION("Arizona Extcon driver");
488MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
489MODULE_LICENSE("GPL");
490MODULE_ALIAS("platform:extcon-arizona");