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/*
* This file is part of the coreboot project.
*
* 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/acpigen_dsm.h>
#include <device/device.h>
#include <stdint.h>
#include <string.h>
#include "chip.h"
#include <gpio.h>
#include <console/console.h>
#if CONFIG(HAVE_ACPI_TABLES)
static void i2c_hid_fill_dsm(struct device *dev)
{
struct drivers_i2c_hid_config *config = dev->chip_info;
struct dsm_i2c_hid_config dsm_config = {
.hid_desc_reg_offset = config->hid_desc_reg_offset,
};
acpigen_write_dsm_i2c_hid(&dsm_config);
}
static void i2c_hid_fill_ssdt_generator(struct device *dev)
{
struct drivers_i2c_hid_config *config = dev->chip_info;
config->generic.cid = I2C_HID_CID;
i2c_generic_fill_ssdt(dev, &i2c_hid_fill_dsm, &config->generic);
}
static const char *i2c_hid_acpi_name(const struct device *dev)
{
static char name[5];
snprintf(name, sizeof(name), "H%03.3X", dev->path.i2c.device);
name[4] = '\0';
return name;
}
#endif
static struct device_operations i2c_hid_ops = {
.read_resources = DEVICE_NOOP,
.set_resources = DEVICE_NOOP,
.enable_resources = DEVICE_NOOP,
#if CONFIG(HAVE_ACPI_TABLES)
.acpi_name = i2c_hid_acpi_name,
.acpi_fill_ssdt = i2c_hid_fill_ssdt_generator,
#endif
};
static void i2c_hid_enable(struct device *dev)
{
struct drivers_i2c_hid_config *config = dev->chip_info;
if (!config)
return;
/* Check if device is present by reading GPIO */
if (config->generic.device_present_gpio) {
int present = gpio_get(config->generic.device_present_gpio);
present ^= config->generic.device_present_gpio_invert;
printk(BIOS_INFO, "%s is %spresent\n",
dev->chip_ops->name, present ? "" : "not ");
if (!present) {
dev->enabled = 0;
return;
}
}
dev->ops = &i2c_hid_ops;
if (config && config->generic.desc) {
dev->name = config->generic.desc;
}
}
struct chip_operations drivers_i2c_hid_ops = {
CHIP_NAME("I2C HID Device")
.enable_dev = i2c_hid_enable
};
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