diff options
Diffstat (limited to 'src/drivers/i2c/nau8825/nau8825.c')
| -rw-r--r-- | src/drivers/i2c/nau8825/nau8825.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/src/drivers/i2c/nau8825/nau8825.c b/src/drivers/i2c/nau8825/nau8825.c new file mode 100644 index 0000000000..71aaceaf15 --- /dev/null +++ b/src/drivers/i2c/nau8825/nau8825.c @@ -0,0 +1,117 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2016 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <arch/acpi.h> +#include <arch/acpi_device.h> +#include <arch/acpigen.h> +#include <console/console.h> +#include <device/i2c.h> +#include <device/device.h> +#include <device/path.h> +#include <stdint.h> +#include <string.h> +#include "chip.h" + +#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES) + +#define NAU8825_ACPI_NAME "NAU8" +#define NAU8825_ACPI_HID "10508825" +#define NAU8825_DP_INT(key,val) acpi_dp_write_integer("nuvoton," key, (val)) + +static void nau8825_fill_ssdt(struct device *dev) +{ + struct drivers_i2c_nau8825_config *config = dev->chip_info; + const char *scope = acpi_device_scope(dev); + struct acpi_i2c i2c = { + .address = dev->path.i2c.device, + .mode_10bit = dev->path.i2c.mode_10bit, + .speed = config->bus_speed ? : I2C_SPEED_FAST, + .resource = scope, + }; + + if (!dev->enabled || !scope) + return; + if (config->sar_threshold_num > NAU8825_MAX_BUTTONS) + return; + + /* Device */ + acpigen_write_scope(scope); + acpigen_write_device(acpi_device_name(dev)); + acpigen_write_name_string("_HID", NAU8825_ACPI_HID); + acpigen_write_name_integer("_UID", 0); + acpigen_write_name_string("_DDN", dev->chip_ops->name); + acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON); + + /* Resources */ + acpigen_write_name("_CRS"); + acpigen_write_resourcetemplate_header(); + acpi_device_write_i2c(&i2c); + acpi_device_write_interrupt(&config->irq); + acpigen_write_resourcetemplate_footer(); + + /* Device Properties */ + acpi_dp_write_header(); + NAU8825_DP_INT("jkdet-enable", config->jkdet_enable); + NAU8825_DP_INT("jkdet-pull-enable", config->jkdet_pull_enable); + NAU8825_DP_INT("jkdet-pull-up", config->jkdet_pull_up); + NAU8825_DP_INT("jkdet-polarity", config->jkdet_polarity); + NAU8825_DP_INT("vref-impedance", config->vref_impedance); + NAU8825_DP_INT("micbias-voltage", config->micbias_voltage); + NAU8825_DP_INT("sar-hysteresis", config->sar_hysteresis); + NAU8825_DP_INT("sar-voltage", config->sar_voltage); + NAU8825_DP_INT("sar-compare-time", config->sar_compare_time); + NAU8825_DP_INT("sar-sampling-time", config->sar_sampling_time); + NAU8825_DP_INT("short-key-debounce", config->short_key_debounce); + NAU8825_DP_INT("jack-insert-debounce", config->jack_insert_debounce); + NAU8825_DP_INT("jack-eject-deboune", config->jack_eject_debounce); + NAU8825_DP_INT("sar-threshold-num", config->sar_threshold_num); + acpi_dp_write_integer_array("nuvoton,sar-threshold", + config->sar_threshold, + config->sar_threshold_num); + acpi_dp_write_footer(); + + acpigen_pop_len(); /* Device */ + acpigen_pop_len(); /* Scope */ + + printk(BIOS_INFO, "%s: %s address 0%xh irq %d\n", + acpi_device_path(dev), dev->chip_ops->name, + dev->path.i2c.device, config->irq.pin); +} + +static const char *nau8825_acpi_name(struct device *dev) +{ + return NAU8825_ACPI_NAME; +} +#endif + +static struct device_operations nau8825_ops = { + .read_resources = DEVICE_NOOP, + .set_resources = DEVICE_NOOP, + .enable_resources = DEVICE_NOOP, +#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES) + .acpi_name = &nau8825_acpi_name, + .acpi_fill_ssdt_generator = &nau8825_fill_ssdt, +#endif +}; + +static void nau8825_enable(struct device *dev) +{ + dev->ops = &nau8825_ops; +} + +struct chip_operations drivers_i2c_nau8825_ops = { + CHIP_NAME("Nuvoton NAU8825 Codec") + .enable_dev = &nau8825_enable +}; |