projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 23 | struct ts3a227e { | |
| 24 | struct regmap *regmap; | |
| 25 | struct snd_soc_jack *jack; | |
| 26 | bool plugged; | |
| 27 | bool mic_present; | |
| 28 | unsigned int buttons_held; | |
| 29 | }; | |
| 30 | ||
| 31 | /* Button values to be reported on the jack */ | |
| 32 | static const int ts3a227e_buttons[] = { | |
| 33 | SND_JACK_BTN_0, | |
| 34 | SND_JACK_BTN_1, | |
| 35 | SND_JACK_BTN_2, | |
| 36 | SND_JACK_BTN_3, | |
| 37 | }; | |
| 38 | ||
| 39 | #define TS3A227E_NUM_BUTTONS 4 | |
| 40 | #define TS3A227E_JACK_MASK (SND_JACK_HEADPHONE | \ | |
| 41 | SND_JACK_MICROPHONE | \ | |
| 42 | SND_JACK_BTN_0 | \ | |
| 43 | SND_JACK_BTN_1 | \ | |
| 44 | SND_JACK_BTN_2 | \ | |
| 45 | SND_JACK_BTN_3) | |
| 46 | ||
| 47 | /* TS3A227E registers */ | |
| 48 | #define TS3A227E_REG_DEVICE_ID 0x00 | |
| 49 | #define TS3A227E_REG_INTERRUPT 0x01 | |
| 50 | #define TS3A227E_REG_KP_INTERRUPT 0x02 | |
| 51 | #define TS3A227E_REG_INTERRUPT_DISABLE 0x03 | |
| 52 | #define TS3A227E_REG_SETTING_1 0x04 | |
| 53 | #define TS3A227E_REG_SETTING_2 0x05 | |
| 54 | #define TS3A227E_REG_SETTING_3 0x06 | |
| 55 | #define TS3A227E_REG_SWITCH_CONTROL_1 0x07 | |
| 56 | #define TS3A227E_REG_SWITCH_CONTROL_2 0x08 | |
| 57 | #define TS3A227E_REG_SWITCH_STATUS_1 0x09 | |
| 58 | #define TS3A227E_REG_SWITCH_STATUS_2 0x0a | |
| 59 | #define TS3A227E_REG_ACCESSORY_STATUS 0x0b | |
| 60 | #define TS3A227E_REG_ADC_OUTPUT 0x0c | |
| 61 | #define TS3A227E_REG_KP_THRESHOLD_1 0x0d | |
| 62 | #define TS3A227E_REG_KP_THRESHOLD_2 0x0e | |
| 63 | #define TS3A227E_REG_KP_THRESHOLD_3 0x0f | |
| 64 | ||
| 65 | /* TS3A227E_REG_INTERRUPT 0x01 */ | |
| 66 | #define INS_REM_EVENT 0x01 | |
| 67 | #define DETECTION_COMPLETE_EVENT 0x02 | |
| 68 | ||
| 69 | /* TS3A227E_REG_KP_INTERRUPT 0x02 */ | |
| 70 | #define PRESS_MASK(idx) (0x01 << (2 * (idx))) | |
| 71 | #define RELEASE_MASK(idx) (0x02 << (2 * (idx))) | |
| 72 | ||
| 73 | /* TS3A227E_REG_INTERRUPT_DISABLE 0x03 */ | |
| 74 | #define INS_REM_INT_DISABLE 0x01 | |
| 75 | #define DETECTION_COMPLETE_INT_DISABLE 0x02 | |
| 76 | #define ADC_COMPLETE_INT_DISABLE 0x04 | |
| 77 | #define INTB_DISABLE 0x08 | |
| 78 | ||
| 79 | /* TS3A227E_REG_SETTING_2 0x05 */ | |
| 80 | #define KP_ENABLE 0x04 | |
| 81 | ||
| 82 | /* TS3A227E_REG_ACCESSORY_STATUS 0x0b */ | |
| 83 | #define TYPE_3_POLE 0x01 | |
| 84 | #define TYPE_4_POLE_OMTP 0x02 | |
| 85 | #define TYPE_4_POLE_STANDARD 0x04 | |
| 86 | #define JACK_INSERTED 0x08 | |
| 87 | #define EITHER_MIC_MASK (TYPE_4_POLE_OMTP | TYPE_4_POLE_STANDARD) | |
| 88 | ||
| 89 | static const struct reg_default ts3a227e_reg_defaults[] = { | |
| 90 | { TS3A227E_REG_DEVICE_ID, 0x10 }, | |
| 91 | { TS3A227E_REG_INTERRUPT, 0x00 }, | |
| 92 | { TS3A227E_REG_KP_INTERRUPT, 0x00 }, | |
| 93 | { TS3A227E_REG_INTERRUPT_DISABLE, 0x08 }, | |
| 94 | { TS3A227E_REG_SETTING_1, 0x23 }, | |
| 95 | { TS3A227E_REG_SETTING_2, 0x00 }, | |
| 96 | { TS3A227E_REG_SETTING_3, 0x0e }, | |
| 97 | { TS3A227E_REG_SWITCH_CONTROL_1, 0x00 }, | |
| 98 | { TS3A227E_REG_SWITCH_CONTROL_2, 0x00 }, | |
| 99 | { TS3A227E_REG_SWITCH_STATUS_1, 0x0c }, | |
| 100 | { TS3A227E_REG_SWITCH_STATUS_2, 0x00 }, | |
| 101 | { TS3A227E_REG_ACCESSORY_STATUS, 0x00 }, | |
| 102 | { TS3A227E_REG_ADC_OUTPUT, 0x00 }, | |
| 103 | { TS3A227E_REG_KP_THRESHOLD_1, 0x20 }, | |
| 104 | { TS3A227E_REG_KP_THRESHOLD_2, 0x40 }, | |
| 105 | { TS3A227E_REG_KP_THRESHOLD_3, 0x68 }, | |
| 106 | }; | |
| 107 | ||
| 108 | static bool ts3a227e_readable_reg(struct device *dev, unsigned int reg) | |
| 109 | { | |
| 110 | switch (reg) { | |
| 111 | case TS3A227E_REG_DEVICE_ID ... TS3A227E_REG_KP_THRESHOLD_3: | |
| 112 | return true; | |
| 113 | default: | |
| 114 | return false; | |
| 115 | } | |
| 116 | } | |
| 117 | ||
| 118 | static bool ts3a227e_writeable_reg(struct device *dev, unsigned int reg) | |
| 119 | { | |
| 120 | switch (reg) { | |
| 121 | case TS3A227E_REG_INTERRUPT_DISABLE ... TS3A227E_REG_SWITCH_CONTROL_2: | |
| 122 | case TS3A227E_REG_KP_THRESHOLD_1 ... TS3A227E_REG_KP_THRESHOLD_3: | |
| 123 | return true; | |
| 124 | default: | |
| 125 | return false; | |
| 126 | } | |
| 127 | } | |
| 128 | ||
| 129 | static bool ts3a227e_volatile_reg(struct device *dev, unsigned int reg) | |
| 130 | { | |
| 131 | switch (reg) { | |
| 132 | case TS3A227E_REG_INTERRUPT ... TS3A227E_REG_INTERRUPT_DISABLE: | |
| 133 | case TS3A227E_REG_SETTING_2: | |
| 134 | case TS3A227E_REG_SWITCH_STATUS_1 ... TS3A227E_REG_ADC_OUTPUT: | |
| 135 | return true; | |
| 136 | default: | |
| 137 | return false; | |
| 138 | } | |
| 139 | } | |
| 140 | ||
| 141 | static void ts3a227e_jack_report(struct ts3a227e *ts3a227e) | |
| 142 | { | |
| 143 | unsigned int i; | |
| 144 | int report = 0; | |
| 145 | ||
| 146 | if (!ts3a227e->jack) | |
| 147 | return; | |
| 148 | ||
| 149 | if (ts3a227e->plugged) | |
| 150 | report = SND_JACK_HEADPHONE; | |
| 151 | if (ts3a227e->mic_present) | |
| 152 | report |= SND_JACK_MICROPHONE; | |
| 153 | for (i = 0; i < TS3A227E_NUM_BUTTONS; i++) { | |
| 154 | if (ts3a227e->buttons_held & (1 << i)) | |
| 155 | report |= ts3a227e_buttons[i]; | |
| 156 | } | |
| 157 | snd_soc_jack_report(ts3a227e->jack, report, TS3A227E_JACK_MASK); | |
| 158 | } | |
| 159 | ||
| 160 | static void ts3a227e_new_jack_state(struct ts3a227e *ts3a227e, unsigned acc_reg) | |
| 161 | { | |
| 162 | bool plugged, mic_present; | |
| 163 | ||
| 164 | plugged = !!(acc_reg & JACK_INSERTED); | |
| 165 | mic_present = plugged && !!(acc_reg & EITHER_MIC_MASK); | |
| 166 | ||
| 167 | ts3a227e->plugged = plugged; | |
| 168 | ||
| 169 | if (mic_present != ts3a227e->mic_present) { | |
| 170 | ts3a227e->mic_present = mic_present; | |
| 171 | ts3a227e->buttons_held = 0; | |
| 172 | if (mic_present) { | |
| 173 | /* Enable key press detection. */ | |
| 174 | regmap_update_bits(ts3a227e->regmap, | |
| 175 | TS3A227E_REG_SETTING_2, | |
| 176 | KP_ENABLE, KP_ENABLE); | |
| 177 | } | |
| 178 | } | |
| 179 | } | |
| 180 | ||
| 181 | static irqreturn_t ts3a227e_interrupt(int irq, void *data) | |
| 182 | { | |
| 183 | struct ts3a227e *ts3a227e = (struct ts3a227e *)data; | |
| 184 | struct regmap *regmap = ts3a227e->regmap; | |
| 185 | unsigned int int_reg, kp_int_reg, acc_reg, i; | |
| 186 | ||
| 187 | /* Check for plug/unplug. */ | |
| 188 | regmap_read(regmap, TS3A227E_REG_INTERRUPT, &int_reg); | |
| 189 | if (int_reg & (DETECTION_COMPLETE_EVENT | INS_REM_EVENT)) { | |
| 190 | regmap_read(regmap, TS3A227E_REG_ACCESSORY_STATUS, &acc_reg); | |
| 191 | ts3a227e_new_jack_state(ts3a227e, acc_reg); | |
| 192 | } | |
| 193 | ||
| 194 | /* Report any key events. */ | |
| 195 | regmap_read(regmap, TS3A227E_REG_KP_INTERRUPT, &kp_int_reg); | |
| 196 | for (i = 0; i < TS3A227E_NUM_BUTTONS; i++) { | |
| 197 | if (kp_int_reg & PRESS_MASK(i)) | |
| 198 | ts3a227e->buttons_held |= (1 << i); | |
| 199 | if (kp_int_reg & RELEASE_MASK(i)) | |
| 200 | ts3a227e->buttons_held &= ~(1 << i); | |
| 201 | } | |
| 202 | ||
| 203 | ts3a227e_jack_report(ts3a227e); | |
| 204 | ||
| 205 | return IRQ_HANDLED; | |
| 206 | } | |
| 207 | ||
| 208 | /** | |
| 209 | * ts3a227e_enable_jack_detect - Specify a jack for event reporting | |
| 210 | * | |
| 211 | * @component: component to register the jack with | |
| 212 | * @jack: jack to use to report headset and button events on | |
| 213 | * | |
| 214 | * After this function has been called the headset insert/remove and button | |
| 215 | * events 0-3 will be routed to the given jack. Jack can be null to stop | |
| 216 | * reporting. | |
| 217 | */ | |
| 218 | int ts3a227e_enable_jack_detect(struct snd_soc_component *component, | |
| 219 | struct snd_soc_jack *jack) | |
| 220 | { | |
| 221 | struct ts3a227e *ts3a227e = snd_soc_component_get_drvdata(component); | |
| 222 | ||
| 223 | snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_MEDIA); | |
| 224 | snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOLUMEUP); | |
| 225 | snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEDOWN); | |
| 226 | snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOICECOMMAND); | |
| 227 | ||
| 228 | ts3a227e->jack = jack; | |
| 229 | ts3a227e_jack_report(ts3a227e); | |
| 230 | ||
| 231 | return 0; | |
| 232 | } | |
| 233 | EXPORT_SYMBOL_GPL(ts3a227e_enable_jack_detect); | |
| 234 | ||
| 235 | static struct snd_soc_component_driver ts3a227e_soc_driver; | |
| 236 | ||
| 237 | static const struct regmap_config ts3a227e_regmap_config = { | |
| 238 | .val_bits = 8, | |
| 239 | .reg_bits = 8, | |
| 240 | ||
| 241 | .max_register = TS3A227E_REG_KP_THRESHOLD_3, | |
| 242 | .readable_reg = ts3a227e_readable_reg, | |
| 243 | .writeable_reg = ts3a227e_writeable_reg, | |
| 244 | .volatile_reg = ts3a227e_volatile_reg, | |
| 245 | ||
| 246 | .cache_type = REGCACHE_RBTREE, | |
| 247 | .reg_defaults = ts3a227e_reg_defaults, | |
| 248 | .num_reg_defaults = ARRAY_SIZE(ts3a227e_reg_defaults), | |
| 249 | }; | |
| 250 | ||
| 251 | static int ts3a227e_i2c_probe(struct i2c_client *i2c, | |
| 252 | const struct i2c_device_id *id) | |
| 253 | { | |
| 254 | struct ts3a227e *ts3a227e; | |
| 255 | struct device *dev = &i2c->dev; | |
| 256 | int ret; | |
| 257 | ||
| 258 | ts3a227e = devm_kzalloc(&i2c->dev, sizeof(*ts3a227e), GFP_KERNEL); | |
| 259 | if (ts3a227e == NULL) | |
| 260 | return -ENOMEM; | |
| 261 | ||
| 262 | i2c_set_clientdata(i2c, ts3a227e); | |
| 263 | ||
| 264 | ts3a227e->regmap = devm_regmap_init_i2c(i2c, &ts3a227e_regmap_config); | |
| 265 | if (IS_ERR(ts3a227e->regmap)) | |
| 266 | return PTR_ERR(ts3a227e->regmap); | |
| 267 | ||
| 268 | ret = devm_request_threaded_irq(dev, i2c->irq, NULL, ts3a227e_interrupt, | |
| 269 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
| 270 | "TS3A227E", ts3a227e); | |
| 271 | if (ret) { | |
| 272 | dev_err(dev, "Cannot request irq %d (%d)\n", i2c->irq, ret); | |
| 273 | return ret; | |
| 274 | } | |
| 275 | ||
| 276 | ret = devm_snd_soc_register_component(&i2c->dev, &ts3a227e_soc_driver, | |
| 277 | NULL, 0); | |
| 278 | if (ret) | |
| 279 | return ret; | |
| 280 | ||
| 281 | /* Enable interrupts except for ADC complete. */ | |
| 282 | regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_INTERRUPT_DISABLE, | |
| 283 | INTB_DISABLE | ADC_COMPLETE_INT_DISABLE, | |
| 284 | ADC_COMPLETE_INT_DISABLE); | |
| 285 | ||
| 286 | return 0; | |
| 287 | } | |
| 288 | ||
| 289 | static const struct i2c_device_id ts3a227e_i2c_ids[] = { | |
| 290 | { "ts3a227e", 0 }, | |
| 291 | { } | |
| 292 | }; | |
| 293 | MODULE_DEVICE_TABLE(i2c, ts3a227e_i2c_ids); | |
| 294 | ||
| 295 | static const struct of_device_id ts3a227e_of_match[] = { | |
| 296 | { .compatible = "ti,ts3a227e", }, | |
| 297 | { } | |
| 298 | }; | |
| 299 | MODULE_DEVICE_TABLE(of, ts3a227e_of_match); | |
| 300 | ||
| 301 | static struct i2c_driver ts3a227e_driver = { | |
| 302 | .driver = { | |
| 303 | .name = "ts3a227e", | |
| 304 | .owner = THIS_MODULE, | |
| 305 | .of_match_table = of_match_ptr(ts3a227e_of_match), | |
| 306 | }, | |
| 307 | .probe = ts3a227e_i2c_probe, | |
| 308 | .id_table = ts3a227e_i2c_ids, | |
| 309 | }; | |
| 310 | module_i2c_driver(ts3a227e_driver); | |
| 311 | ||
| 312 | MODULE_DESCRIPTION("ASoC ts3a227e driver"); | |
| 313 | MODULE_AUTHOR("Dylan Reid <dgreid@chromium.org>"); | |
| 314 | MODULE_LICENSE("GPL v2"); |