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Diffstat (limited to 'src/mainboard/getac/p470/ec.c')
| -rw-r--r-- | src/mainboard/getac/p470/ec.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/src/mainboard/getac/p470/ec.c b/src/mainboard/getac/p470/ec.c new file mode 100644 index 0000000000..2fe44afb8a --- /dev/null +++ b/src/mainboard/getac/p470/ec.c @@ -0,0 +1,235 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008-2009 coresystems GmbH + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#include <console/console.h> +#include <arch/io.h> +#include <delay.h> +#include "ec.h" + +int send_ec_command(u8 command) +{ + int timeout; + + timeout = 0x7ff; + while ((inb(EC_SC) & EC_IBF) && --timeout) { + udelay(10); + if ((timeout & 0xff) == 0) + printk(BIOS_SPEW, "."); + } + if (!timeout) { + printk(BIOS_DEBUG, "Timeout while sending command 0x%02x to EC!\n", + command); + // return -1; + } + + outb(command, EC_SC); + return 0; +} + +int send_ec_data(u8 data) +{ + int timeout; + + timeout = 0x7ff; + while ((inb(EC_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 data 0x%02x to EC!\n", + data); + // return -1; + } + + outb(data, EC_DATA); + + return 0; +} + +int send_ec_data_nowait(u8 data) +{ + outb(data, EC_DATA); + + return 0; +} + +u8 recv_ec_data(void) +{ + int timeout; + u8 data; + + timeout = 0x7fff; + while (--timeout) { // Wait for OBF = 1 + if (inb(EC_SC) & EC_OBF) { + break; + } + udelay(10); + if ((timeout & 0xff) == 0) + printk(BIOS_SPEW, "."); + } + if (!timeout) { + printk(BIOS_DEBUG, "\nTimeout while receiving data from EC!\n"); + // return -1; + } + + data = inb(EC_DATA); + printk(BIOS_SPEW, "recv_ec_data: 0x%02x\n", data); + + return data; +} + +u8 ec_read(u8 addr) +{ + send_ec_command(0x80); + send_ec_data(addr); + + return recv_ec_data(); +} + +int ec_write(u8 addr, u8 data) +{ + send_ec_command(0x81); + send_ec_data(addr); + return send_ec_data(data); +} + +int ec_dump_status(void) +{ + u8 ec_sc = inb(EC_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; +} + + +/* ********************************** */ + +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; +} + |