| /* |
| * 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 |
| }; |