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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * (C) Copyright 2002
- * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
- * Marius Groeger <mgroeger@sysgo.de>
- *
- * (C) Copyright 2002
- * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
- * Alex Zuepke <azu@sysgo.de>
- *
- * (C) Copyright 2002
- * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
- */
- #include <common.h>
- #if defined (CONFIG_IMX)
- #include <asm/arch/imx-regs.h>
- int timer_init (void)
- {
- int i;
- /* setup GP Timer 1 */
- TCTL1 = TCTL_SWR;
- for ( i=0; i<100; i++) TCTL1 = 0; /* We have no udelay by now */
- TPRER1 = get_PERCLK1() / 1000000; /* 1 MHz */
- TCTL1 |= TCTL_FRR | (1<<1); /* Freerun Mode, PERCLK1 input */
- /* Reset the timer */
- TCTL1 &= ~TCTL_TEN;
- TCTL1 |= TCTL_TEN; /* Enable timer */
- return (0);
- }
- /*
- * timer without interrupts
- */
- ulong get_timer (ulong base)
- {
- return get_timer_masked() - base;
- }
- ulong get_timer_masked (void)
- {
- return TCN1;
- }
- void udelay_masked (unsigned long usec)
- {
- ulong endtime = get_timer_masked() + usec;
- signed long diff;
- do {
- ulong now = get_timer_masked ();
- diff = endtime - now;
- } while (diff >= 0);
- }
- void __udelay (unsigned long usec)
- {
- udelay_masked(usec);
- }
- /*
- * This function is derived from PowerPC code (read timebase as long long).
- * On ARM it just returns the timer value.
- */
- unsigned long long get_ticks(void)
- {
- return get_timer(0);
- }
- /*
- * This function is derived from PowerPC code (timebase clock frequency).
- * On ARM it returns the number of timer ticks per second.
- */
- ulong get_tbclk (void)
- {
- return CONFIG_SYS_HZ;
- }
- /*
- * Reset the cpu by setting up the watchdog timer and let him time out
- */
- void reset_cpu (ulong ignored)
- {
- /* Disable watchdog and set Time-Out field to 0 */
- WCR = 0x00000000;
- /* Write Service Sequence */
- WSR = 0x00005555;
- WSR = 0x0000AAAA;
- /* Enable watchdog */
- WCR = 0x00000001;
- while (1);
- /*NOTREACHED*/
- }
- #endif /* defined (CONFIG_IMX) */
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