| // 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) */ |