/* * (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> * * 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> #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) { ulong tbclk; tbclk = CONFIG_SYS_HZ; return tbclk; } /* * 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) */