first round name simplification. drop the <component>_ prefix.

the prefix was introduced in the early v2 tree many years ago
because our old build system "newconfig" could not handle two files with
the same name in different paths like /path/to/usb.c and
/another/path/to/usb.c correctly. Only one of the files would end up
being compiled into the final image.

Since Kconfig (actually since shortly before we switched to Kconfig) we
don't suffer from that problem anymore. So we could drop the sb700_
prefix from all those filenames (or, the <componentname>_ prefix in general)

- makes it easier to fork off a new chipset
- makes it easier to diff against other chipsets
- storing redundant information in filenames seems wrong

Signed-off-by: <stepan@coresystems.de>

Acked-by: Patrick Georgi <patrick@georgi-clan.de>
Acked-by: Peter Stuge <peter@stuge.se>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6149 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 177 insertions, 0 deletions

diff --git a/src/southbridge/nvidia/mcp55/smbus.h b/src/southbridge/nvidia/mcp55/smbus.h
new file mode 100644
index 0000000000..d1dade9c45
--- /dev/null
+++ b/src/southbridge/nvidia/mcp55/smbus.h
@@ -0,0 +1,177 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2004 Tyan Computer
+ * Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer.
+ * Copyright (C) 2006,2007 AMD
+ * Written by Yinghai Lu <yinghai.lu@amd.com> for AMD.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 <device/smbus_def.h>
+
+#define SMBHSTSTAT	0x1
+#define SMBHSTPRTCL	0x0
+#define SMBHSTCMD	0x3
+#define SMBXMITADD	0x2
+#define SMBHSTDAT0	0x4
+#define SMBHSTDAT1	0x5
+
+/* Between 1-10 seconds, We should never timeout normally
+ * Longer than this is just painful when a timeout condition occurs.
+ */
+#define SMBUS_TIMEOUT	(100*1000*10)
+
+static inline void smbus_delay(void)
+{
+	outb(0x80, 0x80);
+}
+
+static int smbus_wait_until_done(unsigned smbus_io_base)
+{
+	unsigned long loops;
+	loops = SMBUS_TIMEOUT;
+	do {
+		unsigned char val;
+		smbus_delay();
+
+		val = inb(smbus_io_base + SMBHSTSTAT);
+		if ( (val & 0xff) != 0) {
+			return 0;
+		}
+	} while(--loops);
+	return -3;
+}
+static int do_smbus_recv_byte(unsigned smbus_io_base, unsigned device)
+{
+	unsigned char global_status_register;
+	unsigned char byte;
+
+	/* set the device I'm talking too */
+	outb(((device & 0x7f) << 1)|1 , smbus_io_base + SMBXMITADD);
+	smbus_delay();
+
+	/* byte data recv */
+	outb(0x05, smbus_io_base + SMBHSTPRTCL);
+	smbus_delay();
+
+	/* poll for transaction completion */
+	if (smbus_wait_until_done(smbus_io_base) < 0) {
+		return -3;
+	}
+
+	global_status_register = inb(smbus_io_base + SMBHSTSTAT) & 0x80; /* lose check */
+
+	/* read results of transaction */
+	byte = inb(smbus_io_base + SMBHSTCMD);
+
+	if (global_status_register != 0x80) { // lose check, otherwise it should be 0
+		return -1;
+	}
+	return byte;
+}
+static int do_smbus_send_byte(unsigned smbus_io_base, unsigned device, unsigned char val)
+{
+	unsigned global_status_register;
+
+	outb(val, smbus_io_base + SMBHSTDAT0);
+	smbus_delay();
+
+	/* set the command... */
+	outb(val, smbus_io_base + SMBHSTCMD);
+	smbus_delay();
+
+	/* set the device I'm talking too */
+	outb(((device & 0x7f) << 1) | 0, smbus_io_base + SMBXMITADD);
+	smbus_delay();
+
+	/* set up for a byte data write */
+	outb(0x04, smbus_io_base + SMBHSTPRTCL);
+	smbus_delay();
+
+	/* poll for transaction completion */
+	if (smbus_wait_until_done(smbus_io_base) < 0) {
+		return -3;
+	}
+	global_status_register = inb(smbus_io_base + SMBHSTSTAT) & 0x80; /* lose check */;
+
+	if (global_status_register != 0x80) {
+		return -1;
+	}
+	return 0;
+}
+static int do_smbus_read_byte(unsigned smbus_io_base, unsigned device, unsigned address)
+{
+	unsigned char global_status_register;
+	unsigned char byte;
+
+	/* set the device I'm talking too */
+	outb(((device & 0x7f) << 1)|1 , smbus_io_base + SMBXMITADD);
+	smbus_delay();
+	/* set the command/address... */
+	outb(address & 0xff, smbus_io_base + SMBHSTCMD);
+	smbus_delay();
+	/* byte data read */
+	outb(0x07, smbus_io_base + SMBHSTPRTCL);
+	smbus_delay();
+
+	/* poll for transaction completion */
+	if (smbus_wait_until_done(smbus_io_base) < 0) {
+		return -3;
+	}
+
+	global_status_register = inb(smbus_io_base + SMBHSTSTAT) & 0x80; /* lose check */
+
+	/* read results of transaction */
+	byte = inb(smbus_io_base + SMBHSTDAT0);
+
+	if (global_status_register != 0x80) { // lose check, otherwise it should be 0
+		return -1;
+	}
+	return byte;
+}
+
+
+static int do_smbus_write_byte(unsigned smbus_io_base, unsigned device, unsigned address, unsigned char val)
+{
+	unsigned global_status_register;
+
+	outb(val, smbus_io_base + SMBHSTDAT0);
+	smbus_delay();
+
+	/* set the device I'm talking too */
+	outb(((device & 0x7f) << 1) | 0, smbus_io_base + SMBXMITADD);
+	smbus_delay();
+
+	outb(address & 0xff, smbus_io_base + SMBHSTCMD);
+	smbus_delay();
+
+	/* set up for a byte data write */
+	outb(0x06, smbus_io_base + SMBHSTPRTCL);
+	smbus_delay();
+
+	/* poll for transaction completion */
+	if (smbus_wait_until_done(smbus_io_base) < 0) {
+		return -3;
+	}
+	global_status_register = inb(smbus_io_base + SMBHSTSTAT) & 0x80; /* lose check */;
+
+	if (global_status_register != 0x80) {
+		return -1;
+	}
+	return 0;
+}
+