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, 229 insertions, 0 deletions

diff --git a/src/southbridge/nvidia/ck804/smbus.h b/src/southbridge/nvidia/ck804/smbus.h
new file mode 100644
index 0000000000..2cdcadce80
--- /dev/null
+++ b/src/southbridge/nvidia/ck804/smbus.h
@@ -0,0 +1,229 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2004 Tyan Computer
+ * Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer.
+ *
+ * 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 <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);
+}
+
+#if 0
+/* Not needed, upon write to PRTCL, the status will be auto-cleared. */
+static int smbus_wait_until_ready(unsigned smbus_io_base)
+{
+	unsigned long loops;
+	loops = SMBUS_TIMEOUT;
+	do {
+		unsigned char val;
+		smbus_delay();
+		val = inb(smbus_io_base + SMBHSTSTAT);
+		val &= 0x1f;
+		if (val == 0)
+			return 0;
+		outb(val, smbus_io_base + SMBHSTSTAT);
+	} while (--loops);
+	return -2;
+}
+#endif
+
+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;
+}
+
+#ifndef __PRE_RAM__
+static int do_smbus_recv_byte(unsigned smbus_io_base, unsigned device)
+{
+	unsigned char global_status_register, byte;
+
+#if 0
+	/* Not needed, upon write to PRTCL, the status will be auto-cleared. */
+	if (smbus_wait_until_ready(smbus_io_base) < 0)
+		return -2;
+#endif
+
+	/* Set the device I'm talking to. */
+	outb(((device & 0x7f) << 1) | 1, smbus_io_base + SMBXMITADD);
+	smbus_delay();
+
+	/* Set the command/address. */
+	outb(0, smbus_io_base + SMBHSTCMD);
+	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;
+
+	/* Lose check */
+	global_status_register = inb(smbus_io_base + SMBHSTSTAT) & 0x80;
+
+	/* Read results of transaction. */
+	byte = inb(smbus_io_base + SMBHSTDAT0);
+
+	/* Lose check, otherwise it should be 0. */
+	if (global_status_register != 0x80)
+		return -1;
+
+	return byte;
+}
+
+static int do_smbus_send_byte(unsigned smbus_io_base, unsigned device,
+			      unsigned char val)
+{
+	unsigned global_status_register;
+
+#if 0
+	/* Not needed, upon write to PRTCL, the status will be auto-cleared. */
+	if (smbus_wait_until_ready(smbus_io_base) < 0)
+		return -2;
+#endif
+
+	outb(val, smbus_io_base + SMBHSTDAT0);
+	smbus_delay();
+
+	/* Set the device I'm talking to. */
+	outb(((device & 0x7f) << 1) | 0, smbus_io_base + SMBXMITADD);
+	smbus_delay();
+
+	outb(0, smbus_io_base + SMBHSTCMD);
+	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;
+
+	/* Lose check */
+	global_status_register = inb(smbus_io_base + SMBHSTSTAT) & 0x80;
+
+	if (global_status_register != 0x80)
+		return -1;
+
+	return 0;
+}
+#endif
+
+static int do_smbus_read_byte(unsigned smbus_io_base, unsigned device,
+			      unsigned address)
+{
+	unsigned char global_status_register, byte;
+
+#if 0
+	/* Not needed, upon write to PRTCL, the status will be auto-cleared. */
+	if (smbus_wait_until_ready(smbus_io_base) < 0)
+		return -2;
+#endif
+
+	/* Set the device I'm talking to. */
+	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;
+
+	/* Lose check */
+	global_status_register = inb(smbus_io_base + SMBHSTSTAT) & 0x80;
+
+	/* Read results of transaction. */
+	byte = inb(smbus_io_base + SMBHSTDAT0);
+
+	/* Lose check, otherwise it should be 0. */
+	if (global_status_register != 0x80)
+		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;
+
+#if 0
+	/* Not needed, upon write to PRTCL, the status will be auto-cleared. */
+	if (smbus_wait_until_ready(smbus_io_base) < 0)
+		return -2;
+#endif
+
+	outb(val, smbus_io_base + SMBHSTDAT0);
+	smbus_delay();
+
+	/* Set the device I'm talking to. */
+	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;
+
+	/* Lose check */
+	global_status_register = inb(smbus_io_base + SMBHSTSTAT) & 0x80;
+
+	if (global_status_register != 0x80)
+		return -1;
+
+	return 0;
+}