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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
23#include "ts3a227e.h"
24
25struct 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
34static 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
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
68#define INS_REM_EVENT 0x01
69#define DETECTION_COMPLETE_EVENT 0x02
70
71
72#define PRESS_MASK(idx) (0x01 << (2 * (idx)))
73#define RELEASE_MASK(idx) (0x02 << (2 * (idx)))
74
75
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
82#define KP_ENABLE 0x04
83
84
85#define MICBIAS_SETTING_SFT (3)
86#define MICBIAS_SETTING_MASK (0x7 << MICBIAS_SETTING_SFT)
87
88
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
95static 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
114static 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
124static 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
135static 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
147static 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
166static 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
180 regmap_update_bits(ts3a227e->regmap,
181 TS3A227E_REG_SETTING_2,
182 KP_ENABLE, KP_ENABLE);
183 }
184 }
185}
186
187static 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
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
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
216
217
218
219
220
221
222
223
224int 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);
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);
233
234 ts3a227e->jack = jack;
235 ts3a227e_jack_report(ts3a227e);
236
237 return 0;
238}
239EXPORT_SYMBOL_GPL(ts3a227e_enable_jack_detect);
240
241static struct snd_soc_component_driver ts3a227e_soc_driver;
242
243static 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
257static 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
272static 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;
278 unsigned int acc_reg;
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
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
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
312 regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_INTERRUPT_DISABLE,
313 INTB_DISABLE | ADC_COMPLETE_INT_DISABLE,
314 ADC_COMPLETE_INT_DISABLE);
315
316
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
321 return 0;
322}
323
324static const struct i2c_device_id ts3a227e_i2c_ids[] = {
325 { "ts3a227e", 0 },
326 { }
327};
328MODULE_DEVICE_TABLE(i2c, ts3a227e_i2c_ids);
329
330static const struct of_device_id ts3a227e_of_match[] = {
331 { .compatible = "ti,ts3a227e", },
332 { }
333};
334MODULE_DEVICE_TABLE(of, ts3a227e_of_match);
335
336static 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};
345module_i2c_driver(ts3a227e_driver);
346
347MODULE_DESCRIPTION("ASoC ts3a227e driver");
348MODULE_AUTHOR("Dylan Reid <dgreid@chromium.org>");
349MODULE_LICENSE("GPL v2");
350
