x86: Rename pcat_ to i8254 and i8259 accordingly
Rename pcat_timer.c to i8254.c and pcat_interrupts.c to i8259.c,
to match their header file names (i8254.h and i8259.h).
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/lib/i8254.c b/arch/x86/lib/i8254.c
new file mode 100644
index 0000000..46a4245
--- /dev/null
+++ b/arch/x86/lib/i8254.c
@@ -0,0 +1,37 @@
+/*
+ * (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 TIMER1_VALUE 18 /* 15.6us */
+#define TIMER2_VALUE 0x0a8e /* 440Hz */
+
+int i8254_init(void)
+{
+ /*
+ * Initialize counter 1, used to refresh request signal.
+ * This is required for legacy purpose as some codes like
+ * vgabios utilizes counter 1 to provide delay functionality.
+ */
+ outb(PIT_CMD_CTR1 | PIT_CMD_LOW | PIT_CMD_MODE2,
+ PIT_BASE + PIT_COMMAND);
+ outb(TIMER1_VALUE, PIT_BASE + PIT_T1);
+
+ /*
+ * Initialize counter 2, used to drive the speaker.
+ * To start a beep, set both bit0 and bit1 of port 0x61.
+ * To stop it, clear both bit0 and bit1 of port 0x61.
+ */
+ 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;
+}