Add new ec subdir for Embedded Controllers and common ACPI EC support
Adds a new src/ec subdir for embedded controllers (mostly found in laptops)
and converts Getac P470 and Roda RK886EX to use the new ACPI EC instead
of having their own copies of those functions.
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6304 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
diff --git a/src/ec/Kconfig b/src/ec/Kconfig
new file mode 100644
index 0000000..9408f6b
--- /dev/null
+++ b/src/ec/Kconfig
@@ -0,0 +1 @@
+source src/ec/acpi/Kconfig
diff --git a/src/ec/Makefile.inc b/src/ec/Makefile.inc
new file mode 100644
index 0000000..20d71ab
--- /dev/null
+++ b/src/ec/Makefile.inc
@@ -0,0 +1 @@
+subdirs-y += acpi
diff --git a/src/ec/acpi/Kconfig b/src/ec/acpi/Kconfig
new file mode 100644
index 0000000..642f178
--- /dev/null
+++ b/src/ec/acpi/Kconfig
@@ -0,0 +1,4 @@
+config EC_ACPI
+ bool
+ help
+ ACPI Embedded Controller interface. Mostly found in laptops.
diff --git a/src/ec/acpi/Makefile.inc b/src/ec/acpi/Makefile.inc
new file mode 100644
index 0000000..34c5136
--- /dev/null
+++ b/src/ec/acpi/Makefile.inc
@@ -0,0 +1,2 @@
+ramstage-y += ec.c
+smm-$(CONFIG_HAVE_SMI_HANDLER) += ec.c
diff --git a/src/ec/acpi/ec.c b/src/ec/acpi/ec.c
new file mode 100644
index 0000000..7a01b7e
--- /dev/null
+++ b/src/ec/acpi/ec.c
@@ -0,0 +1,118 @@
+/*
+ * 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 <device/device.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_DEBUG, "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);
+}
+
+struct chip_operations ec_acpi_ops = {
+ CHIP_NAME("ACPI Embedded Controller")
+};
diff --git a/src/ec/acpi/ec.h b/src/ec/acpi/ec.h
new file mode 100644
index 0000000..77ee637
--- /dev/null
+++ b/src/ec/acpi/ec.h
@@ -0,0 +1,49 @@
+/*
+ * 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
+ */
+
+#ifndef _EC_ACPI_H
+#define _EC_ACPI_H
+
+#define EC_DATA 0x62
+#define EC_SC 0x66
+
+/* EC_SC input */
+#define EC_SMI_EVT (1 << 6) // 1: SMI event pending
+#define EC_SCI_EVT (1 << 5) // 1: SCI event pending
+#define EC_BURST (1 << 4) // controller is in burst mode
+#define EC_CMD (1 << 3) // 1: byte in data register is command
+ // 0: byte in data register is data
+#define EC_IBF (1 << 1) // 1: input buffer full (data ready for ec)
+#define EC_OBF (1 << 0) // 1: output buffer full (data ready for host)
+/* EC_SC output */
+#define RD_EC 0x80 // Read Embedded Controller
+#define WR_EC 0x81 // Write Embedded Controller
+#define BE_EC 0x82 // Burst Enable Embedded Controller
+#define BD_EC 0x83 // Burst Disable Embedded Controller
+#define QR_EC 0x84 // Query Embedded Controller
+
+int send_ec_command(u8 command);
+int send_ec_data(u8 data);
+int send_ec_data_nowait(u8 data);
+u8 recv_ec_data(void);
+u8 ec_read(u8 addr);
+int ec_write(u8 addr, u8 data);
+
+#endif
+