Add support for VIA EPIA-M850 board
EPIA-M850 can now boot linux. For a list of issues, see:
http://www.coreboot.org/VIA_EPIA-M850
That's all folks.
Change-Id: I7624944dbc05fbf3019897a116954d71dfda0031
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/1228
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/mainboard/via/epia-m850/mainboard.c b/src/mainboard/via/epia-m850/mainboard.c
new file mode 100644
index 0000000..dbe682c
--- /dev/null
+++ b/src/mainboard/via/epia-m850/mainboard.c
@@ -0,0 +1,111 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 Alexandru Gagniuc <mr.nuke.me@gmail.com>
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <device/device.h>
+#include <device/pci_def.h>
+#include <device/pci_ops.h>
+#include <console/console.h>
+
+#if CONFIG_VGA_ROM_RUN
+
+#include <arch/interrupt.h>
+#include <x86emu/x86emu.h>
+
+#include <northbridge/via/vx900/vx900.h>
+
+static int vx900_int15_handler(void)
+{
+ int res;
+
+ printk(BIOS_DEBUG, "%s %0x\n", __func__, X86_AX & 0xffff);
+ /* Set AX return value here so we don't set it every time. Just set it
+ * to something else if the callback is unsupported */
+ res = -1;
+ switch (X86_AX & 0xffff) {
+#if 0
+ case 0x5f01:
+ /* VGA POST - panel type */
+ /* FIXME: Don't hardcode panel type */
+ /* Panel Type Number */
+ X86_CX = 0;
+ res = 0;
+ break;
+ case 0x5f02:
+ {
+ /* Boot device selection */
+ X86_BL = INT15_5F02_BL_HWOPT_CRTCONN;
+ /* FIXME: or 0 ? */
+ X86_BH = 0; // INT15_5F02_BH_TV_CONN_DEFAULT;
+ X86_EBX = 0; // INT15_5F02_EBX_HDTV_RGB;
+ X86_ECX = INT15_5F02_ECX_DISPLAY_CRT;
+ //X86_ECX |= INT15_5F02_ECX_TV_MODE_RGB;
+ //X86_ECX |= INT15_5F02_ECX_HDTV_1080P;
+ X86_DL = INT15_5F02_DL_TV_LAYOUT_DEFAULT;
+ res = 0;
+ break;
+ }
+#endif
+ case 0x5f18:
+ X86_BL = vx900_int15_get_5f18_bl();
+ res = 0;
+ break;
+#if 0
+ case 0x5f2a:
+ /* Get SSC Control Settings */
+ /* FIXME: No idea what this does. Just disable this feature
+ * for now */
+ X86_CX = INT15_5F2A_CX_SSC_ENABLE;
+ res = 0;
+ break;
+ case 0x5f2b:
+ /* Engine clock setting */
+ /* FIXME: ECLK fixed 250MHz ? */
+ X86_EBX = INT15_5F2B_EBX_ECLK_250MHZ;
+ break;
+#endif
+ default:
+ printk(BIOS_DEBUG, "Unsupported INT15 call %04x!\n",
+ X86_AX & 0xffff);
+ X86_AX = 0;
+ res = -1;
+ break;
+ }
+
+ if (res == 0)
+ X86_AX = 0x5f;
+ else
+ X86_AX = 0;
+ return X86_AX;
+}
+#endif
+
+static void mainboard_enable(device_t dev)
+{
+ (void)dev;
+
+#if CONFIG_VGA_ROM_RUN
+ print_debug("Installing INT15 handler...\n");
+ mainboard_interrupt_handlers(0x15, &vx900_int15_handler);
+#endif
+}
+
+struct chip_operations mainboard_ops = {
+ CHIP_NAME("VIA EPIA-M850 Mainboard")
+ .enable_dev = mainboard_enable,
+};