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Diffstat (limited to 'src/mainboard/getac/p470/ec.c')
-rw-r--r--src/mainboard/getac/p470/ec.c235
1 files changed, 235 insertions, 0 deletions
diff --git a/src/mainboard/getac/p470/ec.c b/src/mainboard/getac/p470/ec.c
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index 0000000000..2fe44afb8a
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+++ 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;
+}
+