| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/console.h> |
| #include <arch/io.h> |
| #include <delay.h> |
| #include <ec/acpi/ec.h> |
| #include <types.h> |
| |
| #include "ec_oem.h" |
| |
| enum cb_err 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 CB_ERR; |
| } |
| |
| outb(command, EC_OEM_SC); |
| return CB_SUCCESS; |
| } |
| |
| enum cb_err 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 CB_ERR; |
| } |
| |
| outb(data, EC_OEM_DATA); |
| |
| return CB_SUCCESS; |
| } |
| |
| 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_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; |
| } |