Commit | Line | Data |
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2880fc87 DR |
1 | /* |
2 | * TS3A227E Autonomous Audio Accessory Detection and Configuration Switch | |
3 | * | |
4 | * Copyright (C) 2014 Google, Inc. | |
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 version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/gpio.h> | |
12 | #include <linux/i2c.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/input.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/of_gpio.h> | |
17 | #include <linux/regmap.h> | |
18 | ||
19 | #include <sound/core.h> | |
20 | #include <sound/jack.h> | |
21 | #include <sound/soc.h> | |
22 | ||
e7a0332f LP |
23 | #include "ts3a227e.h" |
24 | ||
2880fc87 DR |
25 | struct ts3a227e { |
26 | struct regmap *regmap; | |
27 | struct snd_soc_jack *jack; | |
28 | bool plugged; | |
29 | bool mic_present; | |
30 | unsigned int buttons_held; | |
31 | }; | |
32 | ||
33 | /* Button values to be reported on the jack */ | |
34 | static const int ts3a227e_buttons[] = { | |
35 | SND_JACK_BTN_0, | |
36 | SND_JACK_BTN_1, | |
37 | SND_JACK_BTN_2, | |
38 | SND_JACK_BTN_3, | |
39 | }; | |
40 | ||
41 | #define TS3A227E_NUM_BUTTONS 4 | |
42 | #define TS3A227E_JACK_MASK (SND_JACK_HEADPHONE | \ | |
43 | SND_JACK_MICROPHONE | \ | |
44 | SND_JACK_BTN_0 | \ | |
45 | SND_JACK_BTN_1 | \ | |
46 | SND_JACK_BTN_2 | \ | |
47 | SND_JACK_BTN_3) | |
48 | ||
49 | /* TS3A227E registers */ | |
50 | #define TS3A227E_REG_DEVICE_ID 0x00 | |
51 | #define TS3A227E_REG_INTERRUPT 0x01 | |
52 | #define TS3A227E_REG_KP_INTERRUPT 0x02 | |
53 | #define TS3A227E_REG_INTERRUPT_DISABLE 0x03 | |
54 | #define TS3A227E_REG_SETTING_1 0x04 | |
55 | #define TS3A227E_REG_SETTING_2 0x05 | |
56 | #define TS3A227E_REG_SETTING_3 0x06 | |
57 | #define TS3A227E_REG_SWITCH_CONTROL_1 0x07 | |
58 | #define TS3A227E_REG_SWITCH_CONTROL_2 0x08 | |
59 | #define TS3A227E_REG_SWITCH_STATUS_1 0x09 | |
60 | #define TS3A227E_REG_SWITCH_STATUS_2 0x0a | |
61 | #define TS3A227E_REG_ACCESSORY_STATUS 0x0b | |
62 | #define TS3A227E_REG_ADC_OUTPUT 0x0c | |
63 | #define TS3A227E_REG_KP_THRESHOLD_1 0x0d | |
64 | #define TS3A227E_REG_KP_THRESHOLD_2 0x0e | |
65 | #define TS3A227E_REG_KP_THRESHOLD_3 0x0f | |
66 | ||
67 | /* TS3A227E_REG_INTERRUPT 0x01 */ | |
68 | #define INS_REM_EVENT 0x01 | |
69 | #define DETECTION_COMPLETE_EVENT 0x02 | |
70 | ||
71 | /* TS3A227E_REG_KP_INTERRUPT 0x02 */ | |
72 | #define PRESS_MASK(idx) (0x01 << (2 * (idx))) | |
73 | #define RELEASE_MASK(idx) (0x02 << (2 * (idx))) | |
74 | ||
75 | /* TS3A227E_REG_INTERRUPT_DISABLE 0x03 */ | |
76 | #define INS_REM_INT_DISABLE 0x01 | |
77 | #define DETECTION_COMPLETE_INT_DISABLE 0x02 | |
78 | #define ADC_COMPLETE_INT_DISABLE 0x04 | |
79 | #define INTB_DISABLE 0x08 | |
80 | ||
81 | /* TS3A227E_REG_SETTING_2 0x05 */ | |
82 | #define KP_ENABLE 0x04 | |
83 | ||
39552d7a AP |
84 | /* TS3A227E_REG_SETTING_3 0x06 */ |
85 | #define MICBIAS_SETTING_SFT (3) | |
86 | #define MICBIAS_SETTING_MASK (0x7 << MICBIAS_SETTING_SFT) | |
87 | ||
2880fc87 DR |
88 | /* TS3A227E_REG_ACCESSORY_STATUS 0x0b */ |
89 | #define TYPE_3_POLE 0x01 | |
90 | #define TYPE_4_POLE_OMTP 0x02 | |
91 | #define TYPE_4_POLE_STANDARD 0x04 | |
92 | #define JACK_INSERTED 0x08 | |
93 | #define EITHER_MIC_MASK (TYPE_4_POLE_OMTP | TYPE_4_POLE_STANDARD) | |
94 | ||
95 | static const struct reg_default ts3a227e_reg_defaults[] = { | |
96 | { TS3A227E_REG_DEVICE_ID, 0x10 }, | |
97 | { TS3A227E_REG_INTERRUPT, 0x00 }, | |
98 | { TS3A227E_REG_KP_INTERRUPT, 0x00 }, | |
99 | { TS3A227E_REG_INTERRUPT_DISABLE, 0x08 }, | |
100 | { TS3A227E_REG_SETTING_1, 0x23 }, | |
101 | { TS3A227E_REG_SETTING_2, 0x00 }, | |
102 | { TS3A227E_REG_SETTING_3, 0x0e }, | |
103 | { TS3A227E_REG_SWITCH_CONTROL_1, 0x00 }, | |
104 | { TS3A227E_REG_SWITCH_CONTROL_2, 0x00 }, | |
105 | { TS3A227E_REG_SWITCH_STATUS_1, 0x0c }, | |
106 | { TS3A227E_REG_SWITCH_STATUS_2, 0x00 }, | |
107 | { TS3A227E_REG_ACCESSORY_STATUS, 0x00 }, | |
108 | { TS3A227E_REG_ADC_OUTPUT, 0x00 }, | |
109 | { TS3A227E_REG_KP_THRESHOLD_1, 0x20 }, | |
110 | { TS3A227E_REG_KP_THRESHOLD_2, 0x40 }, | |
111 | { TS3A227E_REG_KP_THRESHOLD_3, 0x68 }, | |
112 | }; | |
113 | ||
114 | static bool ts3a227e_readable_reg(struct device *dev, unsigned int reg) | |
115 | { | |
116 | switch (reg) { | |
117 | case TS3A227E_REG_DEVICE_ID ... TS3A227E_REG_KP_THRESHOLD_3: | |
118 | return true; | |
119 | default: | |
120 | return false; | |
121 | } | |
122 | } | |
123 | ||
124 | static bool ts3a227e_writeable_reg(struct device *dev, unsigned int reg) | |
125 | { | |
126 | switch (reg) { | |
127 | case TS3A227E_REG_INTERRUPT_DISABLE ... TS3A227E_REG_SWITCH_CONTROL_2: | |
128 | case TS3A227E_REG_KP_THRESHOLD_1 ... TS3A227E_REG_KP_THRESHOLD_3: | |
129 | return true; | |
130 | default: | |
131 | return false; | |
132 | } | |
133 | } | |
134 | ||
135 | static bool ts3a227e_volatile_reg(struct device *dev, unsigned int reg) | |
136 | { | |
137 | switch (reg) { | |
138 | case TS3A227E_REG_INTERRUPT ... TS3A227E_REG_INTERRUPT_DISABLE: | |
139 | case TS3A227E_REG_SETTING_2: | |
140 | case TS3A227E_REG_SWITCH_STATUS_1 ... TS3A227E_REG_ADC_OUTPUT: | |
141 | return true; | |
142 | default: | |
143 | return false; | |
144 | } | |
145 | } | |
146 | ||
147 | static void ts3a227e_jack_report(struct ts3a227e *ts3a227e) | |
148 | { | |
149 | unsigned int i; | |
150 | int report = 0; | |
151 | ||
152 | if (!ts3a227e->jack) | |
153 | return; | |
154 | ||
155 | if (ts3a227e->plugged) | |
156 | report = SND_JACK_HEADPHONE; | |
157 | if (ts3a227e->mic_present) | |
158 | report |= SND_JACK_MICROPHONE; | |
159 | for (i = 0; i < TS3A227E_NUM_BUTTONS; i++) { | |
160 | if (ts3a227e->buttons_held & (1 << i)) | |
161 | report |= ts3a227e_buttons[i]; | |
162 | } | |
163 | snd_soc_jack_report(ts3a227e->jack, report, TS3A227E_JACK_MASK); | |
164 | } | |
165 | ||
166 | static void ts3a227e_new_jack_state(struct ts3a227e *ts3a227e, unsigned acc_reg) | |
167 | { | |
168 | bool plugged, mic_present; | |
169 | ||
170 | plugged = !!(acc_reg & JACK_INSERTED); | |
171 | mic_present = plugged && !!(acc_reg & EITHER_MIC_MASK); | |
172 | ||
173 | ts3a227e->plugged = plugged; | |
174 | ||
175 | if (mic_present != ts3a227e->mic_present) { | |
176 | ts3a227e->mic_present = mic_present; | |
177 | ts3a227e->buttons_held = 0; | |
178 | if (mic_present) { | |
179 | /* Enable key press detection. */ | |
180 | regmap_update_bits(ts3a227e->regmap, | |
181 | TS3A227E_REG_SETTING_2, | |
182 | KP_ENABLE, KP_ENABLE); | |
183 | } | |
184 | } | |
185 | } | |
186 | ||
187 | static irqreturn_t ts3a227e_interrupt(int irq, void *data) | |
188 | { | |
189 | struct ts3a227e *ts3a227e = (struct ts3a227e *)data; | |
190 | struct regmap *regmap = ts3a227e->regmap; | |
191 | unsigned int int_reg, kp_int_reg, acc_reg, i; | |
192 | ||
193 | /* Check for plug/unplug. */ | |
194 | regmap_read(regmap, TS3A227E_REG_INTERRUPT, &int_reg); | |
195 | if (int_reg & (DETECTION_COMPLETE_EVENT | INS_REM_EVENT)) { | |
196 | regmap_read(regmap, TS3A227E_REG_ACCESSORY_STATUS, &acc_reg); | |
197 | ts3a227e_new_jack_state(ts3a227e, acc_reg); | |
198 | } | |
199 | ||
200 | /* Report any key events. */ | |
201 | regmap_read(regmap, TS3A227E_REG_KP_INTERRUPT, &kp_int_reg); | |
202 | for (i = 0; i < TS3A227E_NUM_BUTTONS; i++) { | |
203 | if (kp_int_reg & PRESS_MASK(i)) | |
204 | ts3a227e->buttons_held |= (1 << i); | |
205 | if (kp_int_reg & RELEASE_MASK(i)) | |
206 | ts3a227e->buttons_held &= ~(1 << i); | |
207 | } | |
208 | ||
209 | ts3a227e_jack_report(ts3a227e); | |
210 | ||
211 | return IRQ_HANDLED; | |
212 | } | |
213 | ||
214 | /** | |
215 | * ts3a227e_enable_jack_detect - Specify a jack for event reporting | |
216 | * | |
217 | * @component: component to register the jack with | |
218 | * @jack: jack to use to report headset and button events on | |
219 | * | |
220 | * After this function has been called the headset insert/remove and button | |
221 | * events 0-3 will be routed to the given jack. Jack can be null to stop | |
222 | * reporting. | |
223 | */ | |
224 | int ts3a227e_enable_jack_detect(struct snd_soc_component *component, | |
225 | struct snd_soc_jack *jack) | |
226 | { | |
227 | struct ts3a227e *ts3a227e = snd_soc_component_get_drvdata(component); | |
228 | ||
229 | snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_MEDIA); | |
ddf9ea21 AP |
230 | snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOICECOMMAND); |
231 | snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEUP); | |
232 | snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN); | |
2880fc87 DR |
233 | |
234 | ts3a227e->jack = jack; | |
235 | ts3a227e_jack_report(ts3a227e); | |
236 | ||
237 | return 0; | |
238 | } | |
239 | EXPORT_SYMBOL_GPL(ts3a227e_enable_jack_detect); | |
240 | ||
241 | static struct snd_soc_component_driver ts3a227e_soc_driver; | |
242 | ||
243 | static const struct regmap_config ts3a227e_regmap_config = { | |
244 | .val_bits = 8, | |
245 | .reg_bits = 8, | |
246 | ||
247 | .max_register = TS3A227E_REG_KP_THRESHOLD_3, | |
248 | .readable_reg = ts3a227e_readable_reg, | |
249 | .writeable_reg = ts3a227e_writeable_reg, | |
250 | .volatile_reg = ts3a227e_volatile_reg, | |
251 | ||
252 | .cache_type = REGCACHE_RBTREE, | |
253 | .reg_defaults = ts3a227e_reg_defaults, | |
254 | .num_reg_defaults = ARRAY_SIZE(ts3a227e_reg_defaults), | |
255 | }; | |
256 | ||
39552d7a AP |
257 | static int ts3a227e_parse_dt(struct ts3a227e *ts3a227e, struct device_node *np) |
258 | { | |
259 | u32 micbias; | |
260 | int err; | |
261 | ||
262 | err = of_property_read_u32(np, "ti,micbias", &micbias); | |
263 | if (!err) { | |
264 | regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_SETTING_3, | |
265 | MICBIAS_SETTING_MASK, | |
266 | (micbias & 0x07) << MICBIAS_SETTING_SFT); | |
267 | } | |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
2880fc87 DR |
272 | static int ts3a227e_i2c_probe(struct i2c_client *i2c, |
273 | const struct i2c_device_id *id) | |
274 | { | |
275 | struct ts3a227e *ts3a227e; | |
276 | struct device *dev = &i2c->dev; | |
277 | int ret; | |
8e3e36e8 | 278 | unsigned int acc_reg; |
2880fc87 DR |
279 | |
280 | ts3a227e = devm_kzalloc(&i2c->dev, sizeof(*ts3a227e), GFP_KERNEL); | |
281 | if (ts3a227e == NULL) | |
282 | return -ENOMEM; | |
283 | ||
284 | i2c_set_clientdata(i2c, ts3a227e); | |
285 | ||
286 | ts3a227e->regmap = devm_regmap_init_i2c(i2c, &ts3a227e_regmap_config); | |
287 | if (IS_ERR(ts3a227e->regmap)) | |
288 | return PTR_ERR(ts3a227e->regmap); | |
289 | ||
39552d7a AP |
290 | if (dev->of_node) { |
291 | ret = ts3a227e_parse_dt(ts3a227e, dev->of_node); | |
292 | if (ret) { | |
293 | dev_err(dev, "Failed to parse device tree: %d\n", ret); | |
294 | return ret; | |
295 | } | |
296 | } | |
297 | ||
2880fc87 DR |
298 | ret = devm_request_threaded_irq(dev, i2c->irq, NULL, ts3a227e_interrupt, |
299 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
300 | "TS3A227E", ts3a227e); | |
301 | if (ret) { | |
302 | dev_err(dev, "Cannot request irq %d (%d)\n", i2c->irq, ret); | |
303 | return ret; | |
304 | } | |
305 | ||
306 | ret = devm_snd_soc_register_component(&i2c->dev, &ts3a227e_soc_driver, | |
307 | NULL, 0); | |
308 | if (ret) | |
309 | return ret; | |
310 | ||
311 | /* Enable interrupts except for ADC complete. */ | |
312 | regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_INTERRUPT_DISABLE, | |
313 | INTB_DISABLE | ADC_COMPLETE_INT_DISABLE, | |
314 | ADC_COMPLETE_INT_DISABLE); | |
315 | ||
8e3e36e8 CYC |
316 | /* Read jack status because chip might not trigger interrupt at boot. */ |
317 | regmap_read(ts3a227e->regmap, TS3A227E_REG_ACCESSORY_STATUS, &acc_reg); | |
318 | ts3a227e_new_jack_state(ts3a227e, acc_reg); | |
319 | ts3a227e_jack_report(ts3a227e); | |
320 | ||
2880fc87 DR |
321 | return 0; |
322 | } | |
323 | ||
324 | static const struct i2c_device_id ts3a227e_i2c_ids[] = { | |
325 | { "ts3a227e", 0 }, | |
326 | { } | |
327 | }; | |
328 | MODULE_DEVICE_TABLE(i2c, ts3a227e_i2c_ids); | |
329 | ||
330 | static const struct of_device_id ts3a227e_of_match[] = { | |
331 | { .compatible = "ti,ts3a227e", }, | |
332 | { } | |
333 | }; | |
334 | MODULE_DEVICE_TABLE(of, ts3a227e_of_match); | |
335 | ||
336 | static struct i2c_driver ts3a227e_driver = { | |
337 | .driver = { | |
338 | .name = "ts3a227e", | |
339 | .owner = THIS_MODULE, | |
340 | .of_match_table = of_match_ptr(ts3a227e_of_match), | |
341 | }, | |
342 | .probe = ts3a227e_i2c_probe, | |
343 | .id_table = ts3a227e_i2c_ids, | |
344 | }; | |
345 | module_i2c_driver(ts3a227e_driver); | |
346 | ||
347 | MODULE_DESCRIPTION("ASoC ts3a227e driver"); | |
348 | MODULE_AUTHOR("Dylan Reid <dgreid@chromium.org>"); | |
349 | MODULE_LICENSE("GPL v2"); |