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