X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fu-boot%2Farch%2Fx86%2Flib%2Fpcat_timer.c;fp=qemu%2Froms%2Fu-boot%2Farch%2Fx86%2Flib%2Fpcat_timer.c;h=3545a5048e0c9f883263eed8a6a20bf1d9fc1b9a;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/roms/u-boot/arch/x86/lib/pcat_timer.c b/qemu/roms/u-boot/arch/x86/lib/pcat_timer.c
new file mode 100644
index 000000000..3545a5048
--- /dev/null
+++ b/qemu/roms/u-boot/arch/x86/lib/pcat_timer.c
@@ -0,0 +1,27 @@
+/*
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/i8254.h>
+
+#define TIMER2_VALUE 0x0a8e /* 440Hz */
+
+int pcat_timer_init(void)
+{
+	/*
+	 * initialize 2, used to drive the speaker
+	 * (to start a beep: write 3 to port 0x61,
+	 * to stop it again: write 0)
+	 */
+	outb(PIT_CMD_CTR2 | PIT_CMD_BOTH | PIT_CMD_MODE3,
+			PIT_BASE + PIT_COMMAND);
+	outb(TIMER2_VALUE & 0xff, PIT_BASE + PIT_T2);
+	outb(TIMER2_VALUE >> 8, PIT_BASE + PIT_T2);
+
+	return 0;
+}