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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <console/console.h>
#include <arch/io.h>
#include <delay.h>
#include <ec/acpi/ec.h>
#include "ec_oem.h"
int send_ec_oem_command(u8 command)
{
int timeout;
timeout = 0x7ff;
while ((inb(EC_OEM_SC) & EC_IBF) && --timeout) {
udelay(10);
if ((timeout & 0xff) == 0)
printk(BIOS_SPEW, ".");
}
if (!timeout) {
printk(BIOS_DEBUG, "Timeout while sending OEM command 0x%02x to EC!\n",
command);
// return -1;
}
outb(command, EC_OEM_SC);
return 0;
}
int send_ec_oem_data(u8 data)
{
int timeout;
timeout = 0x7ff;
while ((inb(EC_OEM_SC) & EC_IBF) && --timeout) { // wait for IBF = 0
udelay(10);
if ((timeout & 0xff) == 0)
printk(BIOS_SPEW, ".");
}
if (!timeout) {
printk(BIOS_DEBUG, "Timeout while sending OEM data 0x%02x to EC!\n",
data);
// return -1;
}
outb(data, EC_OEM_DATA);
return 0;
}
int send_ec_oem_data_nowait(u8 data)
{
outb(data, EC_OEM_DATA);
return 0;
}
u8 recv_ec_oem_data(void)
{
int timeout;
u8 data;
timeout = 0x7fff;
while (--timeout) { // Wait for OBF = 1
if (inb(EC_OEM_SC) & EC_OBF) {
break;
}
udelay(10);
if ((timeout & 0xff) == 0)
printk(BIOS_SPEW, ".");
}
if (!timeout) {
printk(BIOS_DEBUG, "\nTimeout while receiving OEM data from EC!\n");
// return -1;
}
data = inb(EC_OEM_DATA);
// printk(BIOS_SPEW, "recv_ec_oem_data: 0x%02x\n", data);
return data;
}
u8 ec_oem_read(u8 addr)
{
send_ec_oem_command(0x80);
send_ec_oem_data(addr);
return recv_ec_oem_data();
}
int ec_oem_write(u8 addr, u8 data)
{
send_ec_oem_command(0x81);
send_ec_oem_data(addr);
return send_ec_oem_data(data);
}
int ec_oem_dump_status(void)
{
u8 ec_sc = inb(EC_OEM_SC);
printk(BIOS_DEBUG, "Embedded Controller Status: ");
if (ec_sc & (1 << 6)) printk(BIOS_DEBUG, "SMI_EVT ");
if (ec_sc & (1 << 5)) printk(BIOS_DEBUG, "SCI_EVT ");
if (ec_sc & (1 << 4)) printk(BIOS_DEBUG, "BURST ");
if (ec_sc & (1 << 3)) printk(BIOS_DEBUG, "CMD ");
if (ec_sc & (1 << 1)) printk(BIOS_DEBUG, "IBF ");
if (ec_sc & (1 << 0)) printk(BIOS_DEBUG, "OBF ");
printk(BIOS_DEBUG, "\n");
return ec_sc;
}
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