for serial setup

src/mainboard/via/epia-m/Config

@@ -6,6 +6,7 @@ ldscript cpu/i386/entry32.lds
 mainboardinit cpu/i386/reset16.inc
 ldscript cpu/i386/reset16.lds
 
+mainboardinit mainboard/via/epia-m/smbusenable.inc
 mainboardinit superio/via/vt1211/setup_serial.inc
 mainboardinit pc80/serial.inc
 mainboardinit arch/i386/lib/console.inc

src/mainboard/via/epia-m/smbusenable.inc

@@ -0,0 +1,71 @@
+/* Useful macros PCIBUS, and SMBUS functions for getting DRAM going. */
+/* courtesy Eric Biederman of linuxnetworx.com */
+
+#define CS_WRITE_BYTE(addr, byte) \
+        movl $addr, %eax        ; \
+        movl $byte, %edx        ; \
+        PCI_WRITE_CONFIG_BYTE
+
+#define CS_WRITE_WORD(addr, word) \
+        movl $addr, %eax        ; \
+        movl $word, %ecx        ; \
+        PCI_WRITE_CONFIG_WORD
+
+#define CS_WRITE_LONG(addr, dword) \
+        movl $addr, %eax        ; \
+        movl $dword, %ecx       ; \
+        PCI_WRITE_CONFIG_DWORD
+
+#define DEVFN(device, function) (((device) << 3) + (function))
+#ifndef CONFIG_ADDR
+#define CONFIG_ADDR(bus,devfn,where) (((bus) << 16) | ((devfn) << 8) | (where))
+#endif
+
+/* generic SMB routines that work for many systems. The only one that might
+ * not work is the enable_smbus. 
+ * you have to define PM_FUNCTION for this to work. 
+ */#define SMBUS_IO_BASE 0xf00
+#define SMBHSTSTAT 0
+#define SMBHSTCTL  2
+#define SMBHSTCMD  3
+#define SMBHSTADD  4
+#define SMBHSTDAT0 5
+#define SMBHSTDAT1 6
+#define SMBBLKDAT  7
+
+/* (DA) Lines added to get this to compile */
+#define PM_DEVFN CONFIG_ADDR(0,0x11*8,0)
+#define DRAM_CONFIG_PORT 0x5a
+#define SMBUS_MEM_DEVICE_0 0x50
+#define LAST_SMBUS_MEM_DEVICE  SMBUS_MEM_DEVICE_0
+#define REGISTERED_DRAM_REGISTER $0x69
+#define REGISTERED_DRAM $0x2d
+#define NONREGISTERED_DRAM $0
+
+
+        /* put the SMBUS at port 0xf00 + enable*/
+        CS_WRITE_WORD(PM_DEVFN+ 0xd0, SMBUS_IO_BASE|1)   /* iobase addr */
+        CS_WRITE_BYTE(PM_DEVFN + 0xd2, (0x4 << 1) | 1)      /* smbus enable */
+        CS_WRITE_WORD(PM_DEVFN + 0x4, 1)                    /* iospace enable */
+
+/* The VT1211 serial port needs 48 mhz clock, on power up it is getting
+   only 24 mhz, there is some mysterious device on the smbus that can
+   fix this...this code below does it. */
+
+
+#define MYOUTB(val, port) movb val, %al; movw port, %dx ; outb %al, %dx
+
+#define  I2C_TRANS_CMD          0x40
+#define  CLOCK_SLAVE_ADDRESS    0x69
+
+        MYOUTB( $0xff, $(SMBUS_IO_BASE+SMBHSTSTAT))
+        MYOUTB( $0x7f, $(SMBUS_IO_BASE+SMBHSTDAT0))
+        MYOUTB( $0x83, $(SMBUS_IO_BASE+SMBHSTCMD))
+        MYOUTB( $(CLOCK_SLAVE_ADDRESS<<1), $(SMBUS_IO_BASE+SMBHSTADD))
+        MYOUTB( $(8 | I2C_TRANS_CMD), $(SMBUS_IO_BASE+SMBHSTCTL))
+        movw $(SMBUS_IO_BASE+SMBHSTSTAT), %dx
+smbwait1:
+        inb %dx, %al
+        and  $1, %al
+        jnz smbwait1
+