Add support for Intel Panther Point PCH

[coreboot.git] / src / southbridge / intel / bd82x6x / watchdog.c

diff --git a/src/southbridge/intel/bd82x6x/watchdog.c b/src/southbridge/intel/bd82x6x/watchdog.c
new file mode 100644 (file)
index 0000000..362e896
--- /dev/null
+++ b/src/southbridge/intel/bd82x6x/watchdog.c
@@ -0,0 +1,59 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008-2009 coresystems GmbH
+ * Copyright (C) 2011 Google Inc.
+ *
+ * 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 <device/device.h>
+#include <device/pci.h>
+#include <watchdog.h>
+
+  //
+  //  Disable PCH Watchdog timer at SB_RCBA+0x3410
+  //
+  //  Mmio32((MmPci32(0, 0, 0x1F, 0, 0xF0) & ~BIT0), 0x3410) |= 0x20;
+  //
+void watchdog_off(void)
+{
+       device_t dev;
+       unsigned long value, base;
+
+       /* Turn off the ICH7 watchdog. */
+       dev = dev_find_slot(0, PCI_DEVFN(0x1f, 0));
+
+       /* Enable I/O space. */
+       value = pci_read_config16(dev, 0x04);
+       value |= (1 << 10);
+       pci_write_config16(dev, 0x04, value);
+
+       /* Get TCO base. */
+       base = (pci_read_config32(dev, 0x40) & 0x0fffe) + 0x60;
+
+       /* Disable the watchdog timer. */
+       value = inw(base + 0x08);
+       value |= 1 << 11;
+       outw(value, base + 0x08);
+
+       /* Clear TCO timeout status. */
+       outw(0x0008, base + 0x04);
+       outw(0x0002, base + 0x06);
+
+       printk(BIOS_DEBUG, "PCH watchdog disabled\n");
+}