Author: rminnich
Date: 2008-08-07 01:31:35 +0200 (Thu, 07 Aug 2008)
New Revision: 724
Added:
coreboot-v3/southbridge/nvidia/mcp55/mcp55_smbus.h
coreboot-v3/southbridge/nvidia/mcp55/stage1_smbus.c
Modified:
coreboot-v3/mainboard/gigabyte/m57sli/Makefile
Log:
SMBUS support for mcp55 and v3.
Signed-off-by: Ronald G. Minnich <rminnich(a)gmail.com>
Acked-by: Peter Stuge <peter(a)stuge.se>
Modified: coreboot-v3/mainboard/gigabyte/m57sli/Makefile
===================================================================
--- coreboot-v3/mainboard/gigabyte/m57sli/Makefile 2008-08-05 02:59:00 UTC (rev 723)
+++ coreboot-v3/mainboard/gigabyte/m57sli/Makefile 2008-08-06 23:31:35 UTC (rev 724)
@@ -20,7 +20,8 @@
##
STAGE0_MAINBOARD_OBJ := $(obj)/mainboard/$(MAINBOARDDIR)/stage1.o \
- $(obj)/mainboard/$(MAINBOARDDIR)/option_table.c
+ $(obj)/mainboard/$(MAINBOARDDIR)/option_table.c \
+ $(obj)/southbridge/nvidia/mcp55/stage1_smbus.o
INITRAM_SRC = $(src)/mainboard/$(MAINBOARDDIR)/initram.c
Added: coreboot-v3/southbridge/nvidia/mcp55/mcp55_smbus.h
===================================================================
--- coreboot-v3/southbridge/nvidia/mcp55/mcp55_smbus.h (rev 0)
+++ coreboot-v3/southbridge/nvidia/mcp55/mcp55_smbus.h 2008-08-06 23:31:35 UTC (rev 724)
@@ -0,0 +1,197 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2004 Tyan Computer
+ * Written by Yinghai Lu <yhlu(a)tyan.com> for Tyan Computer.
+ * Copyright (C) 2006,2007 AMD
+ * Written by Yinghai Lu <yinghai.lu(a)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)
+{
+ /* let's hope this is not optimized out */
+ (void) intb(0x80);
+}
+
+static int smbus_wait_until_ready(u16 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;
+}
+
+static int smbus_wait_until_done(u16 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(u16 smbus_io_base, unsigned u8)
+{
+ u8 global_status_register;
+ u8 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) { // loose check, otherwise it should be 0
+ return -1;
+ }
+ return byte;
+}
+
+static int do_smbus_send_byte(u16 smbus_io_base, u8 device, u8 val)
+{
+ u8 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(u16 smbus_io_base, u8 device, u8 address)
+{
+ u8 global_status_register;
+ u8 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(u16 smbus_io_base, u8 device, u8 address, u8 val)
+{
+ u8 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;
+}
+
Added: coreboot-v3/southbridge/nvidia/mcp55/stage1_smbus.c
===================================================================
--- coreboot-v3/southbridge/nvidia/mcp55/stage1_smbus.c (rev 0)
+++ coreboot-v3/southbridge/nvidia/mcp55/stage1_smbus.c 2008-08-06 23:31:35 UTC (rev 724)
@@ -0,0 +1,99 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2004 Tyan Computer
+ * Written by Yinghai Lu <yhlu(a)tyan.com> for Tyan Computer.
+ * Copyright (C) 2006,2007 AMD
+ * Written by Yinghai Lu <yinghai.lu(a)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 <console.h>
+#include <io.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include "mcp55.h"
+#define pci_read_config32(bus, dev, where) pci_cf8_conf1.read32(NULL, bus, dev, where)
+#define pci_write_config32(bus, dev, where, what) pci_cf8_conf1.write32(NULL, bus, dev, where, what)
+#define pci_read_config16(bus, dev, where) pci_cf8_conf1.read32(NULL, bus, dev, where)
+#define pci_write_config16(bus, dev, where, what) pci_cf8_conf1.write32(NULL, bus, dev, where, what)
+#include "mcp55_smbus.h"
+
+#define SMBUS0_IO_BASE 0x1000
+#define SMBUS1_IO_BASE (0x1000+(1<<8))
+/*SIZE 0x40 */
+
+static void enable_smbus(void)
+{
+ u32 dev;
+ dev = pci_locate_device(PCI_ID(0x10de, 0x0368), 0);
+#if 0
+ if (dev == PCI_DEV_INVALID) {
+ die("SMBUS controller not found\r\n");
+ }
+
+ printk(BIOS_DEBUG, "SMBus controller enabled\r\n");
+#endif
+ /* set smbus iobase */
+ pci_write_config32(0, dev, 0x20, SMBUS0_IO_BASE | 1);
+ pci_write_config32(0, dev, 0x24, SMBUS1_IO_BASE | 1);
+ /* Set smbus iospace enable */
+ pci_write_config16(0, dev, 0x4, 0x01);
+ /* clear any lingering errors, so the transaction will run */
+ outb(inb(SMBUS0_IO_BASE + SMBHSTSTAT), SMBUS0_IO_BASE + SMBHSTSTAT);
+ outb(inb(SMBUS1_IO_BASE + SMBHSTSTAT), SMBUS1_IO_BASE + SMBHSTSTAT);
+}
+
+static u8 smbus_recv_byte(u8 device)
+{
+ return do_smbus_recv_byte(SMBUS0_IO_BASE, device);
+}
+
+static u8 smbus_send_byte(u8 device,u8 val)
+{
+ return do_smbus_send_byte(SMBUS0_IO_BASE, device, val);
+}
+
+static u8 smbus_read_byte(u8 device, u8 address)
+{
+ return do_smbus_read_byte(SMBUS0_IO_BASE, device, address);
+}
+
+static u8 smbus_write_byte(u8 device, u8 address, u8 char val)
+{
+ return do_smbus_write_byte(SMBUS0_IO_BASE, device, address, val);
+}
+
+static u8 smbusx_recv_byte(u8 smb_index, u8 device)
+{
+ return do_smbus_recv_byte(SMBUS0_IO_BASE + (smb_index<<8), device);
+}
+
+static u8 smbusx_send_byte(u8 smb_index, u8 device, u8 char val)
+{
+ return do_smbus_send_byte(SMBUS0_IO_BASE + (smb_index<<8), device, val);
+}
+
+static u8 smbusx_read_byte(u8 smb_index, u8 device, u8 address)
+{
+ return do_smbus_read_byte(SMBUS0_IO_BASE + (smb_index<<8), device, address);
+}
+
+static u8 smbusx_write_byte(u8 smb_index, u8 device, u8 address, u8 char val)
+{
+ return do_smbus_write_byte(SMBUS0_IO_BASE + (smb_index<<8), device, address, val);
+}
+
