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Diffstat (limited to 'arch/i386/lib/pcat_timer.c')
-rw-r--r--arch/i386/lib/pcat_timer.c107
1 files changed, 0 insertions, 107 deletions
diff --git a/arch/i386/lib/pcat_timer.c b/arch/i386/lib/pcat_timer.c
deleted file mode 100644
index 1911c6c..0000000
--- a/arch/i386/lib/pcat_timer.c
+++ /dev/null
@@ -1,107 +0,0 @@
-/*
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-#include <asm/io.h>
-#include <asm/i8254.h>
-#include <asm/ibmpc.h>
-#include <asm/interrupt.h>
-
-#define TIMER0_VALUE 0x04aa /* 1kHz 1.9318MHz / 1000 */
-#define TIMER2_VALUE 0x0a8e /* 440Hz */
-
-static int timer_init_done = 0;
-
-int timer_init(void)
-{
- /* initialize timer 0 and 2
- *
- * Timer 0 is used to increment system_tick 1000 times/sec
- * Timer 1 was used for DRAM refresh in early PC's
- * Timer 2 is used to drive the speaker
- * (to stasrt a beep: write 3 to port 0x61,
- * to stop it again: write 0)
- */
- outb (PIT_CMD_CTR0 | PIT_CMD_BOTH | PIT_CMD_MODE2,
- PIT_BASE + PIT_COMMAND);
- outb (TIMER0_VALUE & 0xff, PIT_BASE + PIT_T0);
- outb (TIMER0_VALUE >> 8, PIT_BASE + PIT_T0);
-
- 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);
-
- irq_install_handler (0, timer_isr, NULL);
- unmask_irq (0);
-
- timer_init_done = 1;
-
- return 0;
-}
-
-static u16 read_pit(void)
-{
- u8 low;
-
- outb (PIT_CMD_LATCH, PIT_BASE + PIT_COMMAND);
- low = inb (PIT_BASE + PIT_T0);
-
- return ((inb (PIT_BASE + PIT_T0) << 8) | low);
-}
-
-/* this is not very exact */
-void __udelay (unsigned long usec)
-{
- int counter;
- int wraps;
-
- if (timer_init_done)
- {
- counter = read_pit ();
- wraps = usec / 1000;
- usec = usec % 1000;
-
- usec *= 1194;
- usec /= 1000;
- usec += counter;
-
- while (usec > 1194) {
- usec -= 1194;
- wraps++;
- }
-
- while (1) {
- int new_count = read_pit ();
-
- if (((new_count < usec) && !wraps) || wraps < 0)
- break;
-
- if (new_count > counter)
- wraps--;
-
- counter = new_count;
- }
- }
-
-}