Add board enable for ABIT AV8

I disassembled the write enable and the write disable functions from
the Award BIOS image and reconstructed C code to understand for
myself what happens. For details see:
http://www.flashrom.org/pipermail/flashrom/2011-October/008033.html



I compared the download pages of both, abit AV8 and abit AV8-3rd Eye,
and the BIOS downloads are the same. So it's save to assume that this
board enable works on both versions. Tested on AV8.

Corresponding to flashrom svn r1455.
Signed-off-by: Christoph Grenz <christophg+cb@grenz-bonn.de>
Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>

board_enable.c

@@ -1828,6 +1828,22 @@ static int board_mitac_6513wu(void)
 	return 0;
 }
 
+/*
+ * Suited for:
+ *  - abit AV8: Socket939 + K8T800Pro + VT8237
+ */
+static int board_abit_av8(void)
+{
+	uint8_t val;
+
+	/* Raise GPO pins GP22 & GP23 */
+	val = INB(0x404E);
+	val |= 0xC0;
+	OUTB(val, 0x404E);
+
+	return 0;
+}
+
 /*
  * Suited for:
  *  - ASUS A7V333: VIA KT333 + VT8233A + IT8703F
@@ -1979,6 +1995,7 @@ const struct board_match board_matches[] = {
 	/* first pci-id set [4],          second pci-id set [4],          dmi identifier, coreboot id [2],  phase, vendor name,  board name       max_rom_...  OK? flash enable */
 #if defined(__i386__) || defined(__x86_64__)
 	{0x10DE, 0x0547, 0x147B, 0x1C2F,  0x10DE, 0x0548, 0x147B, 0x1C2F, NULL,         NULL, NULL,           P3, "abit",        "AN-M2",                 0,   NT, nvidia_mcp_gpio2_raise},
+	{0x1106, 0x0282, 0x147B, 0x1415,  0x1106, 0x3227, 0x147B, 0x1415, "^AV8 ",      NULL, NULL,           P3, "abit",        "AV8",                   0,   OK, board_abit_av8},
 	{0x8086, 0x7190,      0,      0,  0x8086, 0x7110,      0,      0, "^i440BX-W977 (BM6)$", NULL, NULL,  P3, "abit",        "BM6",                   0,   OK, intel_piix4_gpo26_lower},
 	{0x8086, 0x24d3, 0x147b, 0x1014,  0x8086, 0x2578, 0x147b, 0x1014, NULL,         NULL, NULL,           P3, "abit",        "IC7",                   0,   NT, intel_ich_gpio23_raise},
 	{0x8086, 0x2930, 0x147b, 0x1084,  0x11ab, 0x4364, 0x147b, 0x1084, NULL,         NULL, NULL,           P3, "abit",        "IP35",                  0,   OK, intel_ich_gpio16_raise},

print.c

@@ -535,6 +535,7 @@ const struct board_info boards_known[] = {
 #if defined(__i386__) || defined(__x86_64__)
 	B("A-Trend",	"ATC-6220",		1, "http://www.motherboard.cz/mb/atrend/atc6220.htm", NULL),
 	B("abit",	"AN-M2",		1, "http://www.abit.com.tw/page/en/motherboard/motherboard_detail.php?DEFTITLE=Y&fMTYPE=Socket%20AM2&pMODEL_NAME=AN-M2", NULL),
+	B("abit",	"AV8",			1, "http://www.abit.com.tw/page/en/motherboard/motherboard_detail.php?DEFTITLE=Y&fMTYPE=Socket%20939&pMODEL_NAME=AV8", NULL),
 	B("abit",	"AX8",			1, "http://www.abit.com.tw/page/en/motherboard/motherboard_detail.php?DEFTITLE=Y&fMTYPE=Socket%20939&pMODEL_NAME=AX8", NULL),
 	B("abit",	"BM6",			1, "http://www.abit.com.tw/page/en/motherboard/motherboard_detail.php?pMODEL_NAME=BM6&fMTYPE=Socket%20370", NULL),
 	B("abit",	"Fatal1ty F-I90HD",	1, "http://www.abit.com.tw/page/en/motherboard/motherboard_detail.php?pMODEL_NAME=Fatal1ty+F-I90HD&fMTYPE=LGA775", NULL),