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/*
* This file is part of the coreboot project.
*
* Copyright 2018 Google LLC
*
* 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_device.h>
#include <arch/acpigen.h>
#include <device/i2c_simple.h>
#include <device/device.h>
#include <device/path.h>
#include <stdint.h>
#include <string.h>
#include "chip.h"
#define I2C_SX9310_ACPI_ID "STH9310"
#define I2C_SX9310_ACPI_NAME "Semtech SX9310"
#define REGISTER(NAME) acpi_dp_add_integer(dsd, \
I2C_SX9310_ACPI_ID "," #NAME, \
config->NAME)
static void i2c_sx9310_fill_ssdt(struct device *dev)
{
struct drivers_i2c_sx9310_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 = I2C_SPEED_FAST,
.resource = scope,
};
struct acpi_dp *dsd;
if (!dev->enabled || !scope || !config)
return;
if (config->speed)
i2c.speed = config->speed;
/* Device */
acpigen_write_scope(scope);
acpigen_write_device(acpi_device_name(dev));
acpigen_write_name_string("_HID", I2C_SX9310_ACPI_ID);
acpigen_write_name_integer("_UID", config->uid);
acpigen_write_name_string("_DDN", config->desc);
acpigen_write_STA(acpi_device_status(dev));
/* Resources */
acpigen_write_name("_CRS");
acpigen_write_resourcetemplate_header();
acpi_device_write_i2c(&i2c);
acpi_device_write_interrupt(&config->irq);
acpigen_write_resourcetemplate_footer();
/* DSD */
dsd = acpi_dp_new_table("_DSD");
#include "registers.h"
acpi_dp_write(dsd);
acpigen_pop_len(); /* Device */
acpigen_pop_len(); /* Scope */
}
#undef REGISTER
static const char *i2c_sx9310_acpi_name(const struct device *dev)
{
static char name[5];
snprintf(name, sizeof(name), "D%03.3X", dev->path.i2c.device);
return name;
}
static struct device_operations i2c_sx9310_ops = {
.read_resources = DEVICE_NOOP,
.set_resources = DEVICE_NOOP,
.enable_resources = DEVICE_NOOP,
.acpi_name = &i2c_sx9310_acpi_name,
.acpi_fill_ssdt_generator = &i2c_sx9310_fill_ssdt,
};
static void i2c_sx9310_enable(struct device *dev)
{
struct drivers_i2c_sx9310_config *config = dev->chip_info;
if (!config) {
dev->enabled = 0;
return;
}
dev->ops = &i2c_sx9310_ops;
if (config->desc)
dev->name = config->desc;
}
struct chip_operations drivers_i2c_sx9310_ops = {
CHIP_NAME(I2C_SX9310_ACPI_NAME)
.enable_dev = &i2c_sx9310_enable
};
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