diff options
Diffstat (limited to 'sound/soc/codecs/ts3a227e.c')
| -rw-r--r-- | sound/soc/codecs/ts3a227e.c | 465 |
1 files changed, 465 insertions, 0 deletions
diff --git a/sound/soc/codecs/ts3a227e.c b/sound/soc/codecs/ts3a227e.c new file mode 100644 index 000000000..6d9166d91 --- /dev/null +++ b/sound/soc/codecs/ts3a227e.c @@ -0,0 +1,465 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * TS3A227E Autonomous Audio Accessory Detection and Configuration Switch + * + * Copyright (C) 2014 Google, Inc. + */ + +#include <linux/gpio.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/input.h> +#include <linux/module.h> +#include <linux/of_gpio.h> +#include <linux/regmap.h> +#include <linux/acpi.h> + +#include <sound/core.h> +#include <sound/jack.h> +#include <sound/soc.h> + +#include "ts3a227e.h" + +struct ts3a227e { + struct device *dev; + struct regmap *regmap; + struct snd_soc_jack *jack; + bool plugged; + bool mic_present; + unsigned int buttons_held; + int irq; +}; + +/* Button values to be reported on the jack */ +static const int ts3a227e_buttons[] = { + SND_JACK_BTN_0, + SND_JACK_BTN_1, + SND_JACK_BTN_2, + SND_JACK_BTN_3, +}; + +#define TS3A227E_NUM_BUTTONS 4 +#define TS3A227E_JACK_MASK (SND_JACK_HEADPHONE | \ + SND_JACK_MICROPHONE | \ + SND_JACK_BTN_0 | \ + SND_JACK_BTN_1 | \ + SND_JACK_BTN_2 | \ + SND_JACK_BTN_3) + +/* TS3A227E registers */ +#define TS3A227E_REG_DEVICE_ID 0x00 +#define TS3A227E_REG_INTERRUPT 0x01 +#define TS3A227E_REG_KP_INTERRUPT 0x02 +#define TS3A227E_REG_INTERRUPT_DISABLE 0x03 +#define TS3A227E_REG_SETTING_1 0x04 +#define TS3A227E_REG_SETTING_2 0x05 +#define TS3A227E_REG_SETTING_3 0x06 +#define TS3A227E_REG_SWITCH_CONTROL_1 0x07 +#define TS3A227E_REG_SWITCH_CONTROL_2 0x08 +#define TS3A227E_REG_SWITCH_STATUS_1 0x09 +#define TS3A227E_REG_SWITCH_STATUS_2 0x0a +#define TS3A227E_REG_ACCESSORY_STATUS 0x0b +#define TS3A227E_REG_ADC_OUTPUT 0x0c +#define TS3A227E_REG_KP_THRESHOLD_1 0x0d +#define TS3A227E_REG_KP_THRESHOLD_2 0x0e +#define TS3A227E_REG_KP_THRESHOLD_3 0x0f + +/* TS3A227E_REG_INTERRUPT 0x01 */ +#define INS_REM_EVENT 0x01 +#define DETECTION_COMPLETE_EVENT 0x02 + +/* TS3A227E_REG_KP_INTERRUPT 0x02 */ +#define PRESS_MASK(idx) (0x01 << (2 * (idx))) +#define RELEASE_MASK(idx) (0x02 << (2 * (idx))) + +/* TS3A227E_REG_INTERRUPT_DISABLE 0x03 */ +#define INS_REM_INT_DISABLE 0x01 +#define DETECTION_COMPLETE_INT_DISABLE 0x02 +#define ADC_COMPLETE_INT_DISABLE 0x04 +#define INTB_DISABLE 0x08 + +/* TS3A227E_REG_SETTING_1 0x4 */ +#define DEBOUNCE_INSERTION_SETTING_SFT (0) +#define DEBOUNCE_INSERTION_SETTING_MASK (0x7 << DEBOUNCE_PRESS_SETTING_SFT) + +/* TS3A227E_REG_SETTING_2 0x05 */ +#define KP_ENABLE 0x04 + +/* TS3A227E_REG_SETTING_3 0x06 */ +#define MICBIAS_SETTING_SFT 3 +#define MICBIAS_SETTING_MASK (0x7 << MICBIAS_SETTING_SFT) +#define DEBOUNCE_RELEASE_SETTING_SFT 2 +#define DEBOUNCE_RELEASE_SETTING_MASK (0x1 << DEBOUNCE_RELEASE_SETTING_SFT) +#define DEBOUNCE_PRESS_SETTING_SFT 0 +#define DEBOUNCE_PRESS_SETTING_MASK (0x3 << DEBOUNCE_PRESS_SETTING_SFT) + +/* TS3A227E_REG_ACCESSORY_STATUS 0x0b */ +#define TYPE_3_POLE 0x01 +#define TYPE_4_POLE_OMTP 0x02 +#define TYPE_4_POLE_STANDARD 0x04 +#define JACK_INSERTED 0x08 +#define EITHER_MIC_MASK (TYPE_4_POLE_OMTP | TYPE_4_POLE_STANDARD) + +static const struct reg_default ts3a227e_reg_defaults[] = { + { TS3A227E_REG_DEVICE_ID, 0x10 }, + { TS3A227E_REG_INTERRUPT, 0x00 }, + { TS3A227E_REG_KP_INTERRUPT, 0x00 }, + { TS3A227E_REG_INTERRUPT_DISABLE, 0x08 }, + { TS3A227E_REG_SETTING_1, 0x23 }, + { TS3A227E_REG_SETTING_2, 0x00 }, + { TS3A227E_REG_SETTING_3, 0x0e }, + { TS3A227E_REG_SWITCH_CONTROL_1, 0x00 }, + { TS3A227E_REG_SWITCH_CONTROL_2, 0x00 }, + { TS3A227E_REG_SWITCH_STATUS_1, 0x0c }, + { TS3A227E_REG_SWITCH_STATUS_2, 0x00 }, + { TS3A227E_REG_ACCESSORY_STATUS, 0x00 }, + { TS3A227E_REG_ADC_OUTPUT, 0x00 }, + { TS3A227E_REG_KP_THRESHOLD_1, 0x20 }, + { TS3A227E_REG_KP_THRESHOLD_2, 0x40 }, + { TS3A227E_REG_KP_THRESHOLD_3, 0x68 }, +}; + +static bool ts3a227e_readable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case TS3A227E_REG_DEVICE_ID ... TS3A227E_REG_KP_THRESHOLD_3: + return true; + default: + return false; + } +} + +static bool ts3a227e_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case TS3A227E_REG_INTERRUPT_DISABLE ... TS3A227E_REG_SWITCH_CONTROL_2: + case TS3A227E_REG_KP_THRESHOLD_1 ... TS3A227E_REG_KP_THRESHOLD_3: + return true; + default: + return false; + } +} + +static bool ts3a227e_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case TS3A227E_REG_INTERRUPT ... TS3A227E_REG_INTERRUPT_DISABLE: + case TS3A227E_REG_SETTING_1 ... TS3A227E_REG_SETTING_2: + case TS3A227E_REG_SWITCH_STATUS_1 ... TS3A227E_REG_ADC_OUTPUT: + return true; + default: + return false; + } +} + +static void ts3a227e_jack_report(struct ts3a227e *ts3a227e) +{ + unsigned int i; + int report = 0; + + if (!ts3a227e->jack) + return; + + if (ts3a227e->plugged) + report = SND_JACK_HEADPHONE; + if (ts3a227e->mic_present) + report |= SND_JACK_MICROPHONE; + for (i = 0; i < TS3A227E_NUM_BUTTONS; i++) { + if (ts3a227e->buttons_held & (1 << i)) + report |= ts3a227e_buttons[i]; + } + snd_soc_jack_report(ts3a227e->jack, report, TS3A227E_JACK_MASK); +} + +static void ts3a227e_new_jack_state(struct ts3a227e *ts3a227e, unsigned acc_reg) +{ + bool plugged, mic_present; + + plugged = !!(acc_reg & JACK_INSERTED); + mic_present = plugged && !!(acc_reg & EITHER_MIC_MASK); + + ts3a227e->plugged = plugged; + + if (mic_present != ts3a227e->mic_present) { + ts3a227e->mic_present = mic_present; + ts3a227e->buttons_held = 0; + if (mic_present) { + /* Enable key press detection. */ + regmap_update_bits(ts3a227e->regmap, + TS3A227E_REG_SETTING_2, + KP_ENABLE, KP_ENABLE); + } + } +} + +static irqreturn_t ts3a227e_interrupt(int irq, void *data) +{ + struct ts3a227e *ts3a227e = (struct ts3a227e *)data; + struct regmap *regmap = ts3a227e->regmap; + unsigned int int_reg, kp_int_reg, acc_reg, i; + struct device *dev = ts3a227e->dev; + int ret; + + /* Check for plug/unplug. */ + ret = regmap_read(regmap, TS3A227E_REG_INTERRUPT, &int_reg); + if (ret) { + dev_err(dev, "failed to clear interrupt ret=%d\n", ret); + return IRQ_NONE; + } + + if (int_reg & (DETECTION_COMPLETE_EVENT | INS_REM_EVENT)) { + regmap_read(regmap, TS3A227E_REG_ACCESSORY_STATUS, &acc_reg); + ts3a227e_new_jack_state(ts3a227e, acc_reg); + } + + /* Report any key events. */ + ret = regmap_read(regmap, TS3A227E_REG_KP_INTERRUPT, &kp_int_reg); + if (ret) { + dev_err(dev, "failed to clear key interrupt ret=%d\n", ret); + return IRQ_NONE; + } + + for (i = 0; i < TS3A227E_NUM_BUTTONS; i++) { + if (kp_int_reg & PRESS_MASK(i)) + ts3a227e->buttons_held |= (1 << i); + if (kp_int_reg & RELEASE_MASK(i)) + ts3a227e->buttons_held &= ~(1 << i); + } + + ts3a227e_jack_report(ts3a227e); + + return IRQ_HANDLED; +} + +/** + * ts3a227e_enable_jack_detect - Specify a jack for event reporting + * + * @component: component to register the jack with + * @jack: jack to use to report headset and button events on + * + * After this function has been called the headset insert/remove and button + * events 0-3 will be routed to the given jack. Jack can be null to stop + * reporting. + */ +int ts3a227e_enable_jack_detect(struct snd_soc_component *component, + struct snd_soc_jack *jack) +{ + struct ts3a227e *ts3a227e = snd_soc_component_get_drvdata(component); + + snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_PLAYPAUSE); + snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOICECOMMAND); + snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEUP); + snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN); + + ts3a227e->jack = jack; + ts3a227e_jack_report(ts3a227e); + + return 0; +} +EXPORT_SYMBOL_GPL(ts3a227e_enable_jack_detect); + +static int ts3a227e_set_jack(struct snd_soc_component *component, + struct snd_soc_jack *jack, void *data) +{ + if (jack == NULL) + return -EINVAL; + + return ts3a227e_enable_jack_detect(component, jack); +} + +static int ts3a227e_get_jack_type(struct snd_soc_component *component) +{ + return SND_JACK_HEADSET; +} + +static const struct snd_soc_component_driver ts3a227e_soc_driver = { + .name = "ti,ts3a227e", + .set_jack = ts3a227e_set_jack, + .get_jack_type = ts3a227e_get_jack_type, +}; + +static const struct regmap_config ts3a227e_regmap_config = { + .val_bits = 8, + .reg_bits = 8, + + .max_register = TS3A227E_REG_KP_THRESHOLD_3, + .readable_reg = ts3a227e_readable_reg, + .writeable_reg = ts3a227e_writeable_reg, + .volatile_reg = ts3a227e_volatile_reg, + + .cache_type = REGCACHE_RBTREE, + .reg_defaults = ts3a227e_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(ts3a227e_reg_defaults), +}; + +static int ts3a227e_parse_device_property(struct ts3a227e *ts3a227e, + struct device *dev) +{ + u32 value; + u32 value_ms; + u32 setting3_value = 0; + u32 setting3_mask = 0; + int err; + + err = device_property_read_u32(dev, "ti,micbias", &value); + if (!err) { + setting3_mask = MICBIAS_SETTING_MASK; + setting3_value = (value << MICBIAS_SETTING_SFT) & + MICBIAS_SETTING_MASK; + } + + err = device_property_read_u32(dev, "ti,debounce-release-ms", + &value_ms); + if (!err) { + value = (value_ms > 10); + setting3_mask |= DEBOUNCE_RELEASE_SETTING_MASK; + setting3_value |= (value << DEBOUNCE_RELEASE_SETTING_SFT) & + DEBOUNCE_RELEASE_SETTING_MASK; + } + + err = device_property_read_u32(dev, "ti,debounce-press-ms", &value_ms); + if (!err) { + value = (value_ms + 20) / 40; + if (value > 3) + value = 3; + setting3_mask |= DEBOUNCE_PRESS_SETTING_MASK; + setting3_value |= (value << DEBOUNCE_PRESS_SETTING_SFT) & + DEBOUNCE_PRESS_SETTING_MASK; + } + + if (setting3_mask) + regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_SETTING_3, + setting3_mask, setting3_value); + + err = device_property_read_u32(dev, "ti,debounce-insertion-ms", + &value_ms); + if (!err) { + if (value_ms < 165) + value = (value_ms + 15) / 30; + else if (value_ms < 1500) + value = 6; + else + value = 7; + regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_SETTING_1, + DEBOUNCE_INSERTION_SETTING_MASK, + (value << DEBOUNCE_INSERTION_SETTING_SFT) & + DEBOUNCE_INSERTION_SETTING_MASK); + } + + return 0; +} + +static int ts3a227e_i2c_probe(struct i2c_client *i2c) +{ + struct ts3a227e *ts3a227e; + struct device *dev = &i2c->dev; + int ret; + unsigned int acc_reg; + + ts3a227e = devm_kzalloc(&i2c->dev, sizeof(*ts3a227e), GFP_KERNEL); + if (ts3a227e == NULL) + return -ENOMEM; + + i2c_set_clientdata(i2c, ts3a227e); + ts3a227e->dev = dev; + ts3a227e->irq = i2c->irq; + + ts3a227e->regmap = devm_regmap_init_i2c(i2c, &ts3a227e_regmap_config); + if (IS_ERR(ts3a227e->regmap)) + return PTR_ERR(ts3a227e->regmap); + + ret = ts3a227e_parse_device_property(ts3a227e, dev); + if (ret) { + dev_err(dev, "Failed to parse device property: %d\n", ret); + return ret; + } + + ret = devm_request_threaded_irq(dev, i2c->irq, NULL, ts3a227e_interrupt, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "TS3A227E", ts3a227e); + if (ret) { + dev_err(dev, "Cannot request irq %d (%d)\n", i2c->irq, ret); + return ret; + } + + ret = devm_snd_soc_register_component(&i2c->dev, &ts3a227e_soc_driver, + NULL, 0); + if (ret) + return ret; + + /* Enable interrupts except for ADC complete. */ + regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_INTERRUPT_DISABLE, + INTB_DISABLE | ADC_COMPLETE_INT_DISABLE, + ADC_COMPLETE_INT_DISABLE); + + /* Read jack status because chip might not trigger interrupt at boot. */ + regmap_read(ts3a227e->regmap, TS3A227E_REG_ACCESSORY_STATUS, &acc_reg); + ts3a227e_new_jack_state(ts3a227e, acc_reg); + ts3a227e_jack_report(ts3a227e); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int ts3a227e_suspend(struct device *dev) +{ + struct ts3a227e *ts3a227e = dev_get_drvdata(dev); + + dev_dbg(ts3a227e->dev, "suspend disable irq\n"); + disable_irq(ts3a227e->irq); + + return 0; +} + +static int ts3a227e_resume(struct device *dev) +{ + struct ts3a227e *ts3a227e = dev_get_drvdata(dev); + + dev_dbg(ts3a227e->dev, "resume enable irq\n"); + enable_irq(ts3a227e->irq); + + return 0; +} +#endif + +static const struct dev_pm_ops ts3a227e_pm = { + SET_SYSTEM_SLEEP_PM_OPS(ts3a227e_suspend, ts3a227e_resume) +}; + +static const struct i2c_device_id ts3a227e_i2c_ids[] = { + { "ts3a227e", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ts3a227e_i2c_ids); + +#ifdef CONFIG_OF +static const struct of_device_id ts3a227e_of_match[] = { + { .compatible = "ti,ts3a227e", }, + { } +}; +MODULE_DEVICE_TABLE(of, ts3a227e_of_match); +#endif + +#ifdef CONFIG_ACPI +static struct acpi_device_id ts3a227e_acpi_match[] = { + { "104C227E", 0 }, + {}, +}; +MODULE_DEVICE_TABLE(acpi, ts3a227e_acpi_match); +#endif + +static struct i2c_driver ts3a227e_driver = { + .driver = { + .name = "ts3a227e", + .pm = &ts3a227e_pm, + .of_match_table = of_match_ptr(ts3a227e_of_match), + .acpi_match_table = ACPI_PTR(ts3a227e_acpi_match), + }, + .probe = ts3a227e_i2c_probe, + .id_table = ts3a227e_i2c_ids, +}; +module_i2c_driver(ts3a227e_driver); + +MODULE_DESCRIPTION("ASoC ts3a227e driver"); +MODULE_AUTHOR("Dylan Reid <dgreid@chromium.org>"); +MODULE_LICENSE("GPL v2"); |