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Diffstat (limited to 'src/mainboard/bostentech/gbyt4/mainboard.c')
-rw-r--r--src/mainboard/bostentech/gbyt4/mainboard.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/src/mainboard/bostentech/gbyt4/mainboard.c b/src/mainboard/bostentech/gbyt4/mainboard.c
new file mode 100644
index 0000000000..c3858469a2
--- /dev/null
+++ b/src/mainboard/bostentech/gbyt4/mainboard.c
@@ -0,0 +1,131 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <types.h>
+#include <device/device.h>
+#include <console/console.h>
+#if CONFIG(VGA_ROM_RUN)
+#include <x86emu/x86emu.h>
+#endif
+#include <acpi/acpi.h>
+#include <arch/interrupt.h>
+#include <smbios.h>
+#include <soc/gpio.h>
+#include <bootstate.h>
+
+void mainboard_suspend_resume(void)
+{
+}
+
+#if CONFIG(VGA_ROM_RUN)
+static int int15_handler(void)
+{
+ int res = 1;
+
+ printk(BIOS_DEBUG, "%s: AX=%04x BX=%04x CX=%04x DX=%04x\n",
+ __func__, X86_AX, X86_BX, X86_CX, X86_DX);
+
+ switch (X86_AX) {
+ case 0x5f34:
+ /*
+ * Set Panel Fitting Hook:
+ * bit 2 = Graphics Stretching
+ * bit 1 = Text Stretching
+ * bit 0 = Centering (do not set with bit1 or bit2)
+ * 0 = video BIOS default
+ */
+ X86_AX = 0x005f;
+ X86_CX = 0x0001;
+ res = 1;
+ break;
+ case 0x5f35:
+ /*
+ * Boot Display Device Hook:
+ * bit 0 = CRT
+ * bit 1 = TV
+ * bit 2 = EFP (HDMI)
+ * bit 3 = LFP (eDP)*
+ * bit 4 = CRT2
+ * bit 5 = TV2
+ * bit 6 = EFP2
+ * bit 7 = LFP2
+ */
+ X86_AX = 0x005f;
+ X86_CX = 0x0008;
+ res = 1;
+ break;
+ case 0x5f51:
+ /*
+ * Hook to select active LFP configuration:
+ * 00h = No LVDS, VBIOS does not enable LVDS
+ * 01h = Int-LVDS, LFP driven by integrated LVDS decoder
+ * 02h = SVDO-LVDS, LFP driven by SVDO decoder
+ * 03h = eDP, LFP Driven by Int-DisplayPort encoder
+ */
+ X86_AX = 0x005f;
+ X86_CX = 0x0003;
+ res = 1;
+ break;
+ case 0x5f70:
+ switch ((X86_CX >> 8) & 0xff) {
+ case 0:
+ /* Get Mux */
+ X86_AX = 0x005f;
+ X86_CX = 0x0000;
+ res = 1;
+ break;
+ case 1:
+ /* Set Mux */
+ X86_AX = 0x005f;
+ X86_CX = 0x0000;
+ res = 1;
+ break;
+ case 2:
+ /* Get SG/Non-SG mode */
+ X86_AX = 0x005f;
+ X86_CX = 0x0000;
+ res = 1;
+ break;
+ default:
+ /* Interrupt was not handled */
+ printk(BIOS_DEBUG,
+ "Unknown INT15 5f70 function: 0x%02x\n",
+ ((X86_CX >> 8) & 0xff));
+ break;
+ }
+ break;
+
+ default:
+ printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", X86_AX);
+ break;
+ }
+ return res;
+}
+#endif
+
+static void mainboard_init(struct device *dev)
+{
+
+}
+
+static int mainboard_smbios_data(struct device *dev, int *handle,
+ unsigned long *current)
+{
+ return 0;
+}
+
+// mainboard_enable is executed as first thing after
+// enumerate_buses().
+
+static void mainboard_enable(struct device *dev)
+{
+ dev->ops->init = mainboard_init;
+ dev->ops->get_smbios_data = mainboard_smbios_data;
+#if CONFIG(VGA_ROM_RUN)
+ /* Install custom int15 handler for VGA OPROM */
+ mainboard_interrupt_handlers(0x15, &int15_handler);
+#endif
+}
+
+struct chip_operations mainboard_ops = {
+ .enable_dev = mainboard_enable,
+};