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f2c32a88 MB |
1 | /* |
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 | ||
33 | struct 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 | ||
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 }, | |
55 | }; | |
56 | ||
325c6423 MB |
57 | #define ARIZONA_CABLE_MECHANICAL 0 |
58 | #define ARIZONA_CABLE_MICROPHONE 1 | |
59 | #define ARIZONA_CABLE_HEADPHONE 2 | |
f2c32a88 MB |
60 | |
61 | static const char *arizona_cable[] = { | |
325c6423 MB |
62 | "Mechanical", |
63 | "Microphone", | |
64 | "Headphone", | |
f2c32a88 MB |
65 | NULL, |
66 | }; | |
67 | ||
f2c32a88 MB |
68 | static 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 | ||
85 | static 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 | ||
119 | static 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 | ||
140 | static 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)) { | |
325c6423 MB |
172 | 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); | |
f2c32a88 MB |
177 | |
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; | |
9ef2224d MB |
199 | arizona_stop_mic(info); |
200 | ||
325c6423 MB |
201 | ret = extcon_set_cable_state_(&info->edev, |
202 | ARIZONA_CABLE_HEADPHONE, | |
203 | true); | |
f2c32a88 MB |
204 | 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 | ||
325c6423 MB |
234 | ret = extcon_set_cable_state_(&info->edev, |
235 | ARIZONA_CABLE_HEADPHONE, | |
236 | true); | |
f2c32a88 MB |
237 | 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 | ||
249 | handled: | |
250 | pm_runtime_mark_last_busy(info->dev); | |
251 | mutex_unlock(&info->lock); | |
252 | ||
253 | return IRQ_HANDLED; | |
254 | } | |
255 | ||
256 | static 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"); | |
325c6423 MB |
278 | ret = extcon_set_cable_state_(&info->edev, |
279 | ARIZONA_CABLE_MECHANICAL, true); | |
f2c32a88 MB |
280 | |
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 | ||
305 | static 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; | |
f2c32a88 MB |
350 | |
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 | ||
441 | err_fall_wake: | |
442 | arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0); | |
443 | err_fall: | |
444 | arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info); | |
445 | err_rise_wake: | |
446 | arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0); | |
447 | err_rise: | |
448 | arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info); | |
449 | err_register: | |
450 | pm_runtime_disable(&pdev->dev); | |
451 | extcon_dev_unregister(&info->edev); | |
452 | err: | |
453 | return ret; | |
454 | } | |
455 | ||
456 | static 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 | ||
476 | static 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 | ||
485 | module_platform_driver(arizona_extcon_driver); | |
486 | ||
487 | MODULE_DESCRIPTION("Arizona Extcon driver"); | |
488 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
489 | MODULE_LICENSE("GPL"); | |
490 | MODULE_ALIAS("platform:extcon-arizona"); |