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author | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2008-07-05 23:11:11 +0200 |
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committer | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2008-08-12 18:41:42 +0200 |
commit | 8ed2f5f950e2581214d20b011a8f27a6396d65d2 (patch) | |
tree | 3416b5a556c770ff8ec0a728b7616f87ebfe9643 /cpu/arm926ejs/at91sam9/timer.c | |
parent | cd82919e6c8a73b363a26f34b734923844e52d1c (diff) | |
download | u-boot-imx-8ed2f5f950e2581214d20b011a8f27a6396d65d2.zip u-boot-imx-8ed2f5f950e2581214d20b011a8f27a6396d65d2.tar.gz u-boot-imx-8ed2f5f950e2581214d20b011a8f27a6396d65d2.tar.bz2 |
at91: move arch-at91sam9 to arch-at91
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Diffstat (limited to 'cpu/arm926ejs/at91sam9/timer.c')
-rw-r--r-- | cpu/arm926ejs/at91sam9/timer.c | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/cpu/arm926ejs/at91sam9/timer.c b/cpu/arm926ejs/at91sam9/timer.c deleted file mode 100644 index c79ec7e..0000000 --- a/cpu/arm926ejs/at91sam9/timer.c +++ /dev/null @@ -1,149 +0,0 @@ -/* - * (C) Copyright 2007-2008 - * Stelian Pop <stelian.pop@leadtechdesign.com> - * Lead Tech Design <www.leadtechdesign.com> - * - * 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/arch/hardware.h> -#include <asm/arch/at91_pit.h> -#include <asm/arch/at91_pmc.h> -#include <asm/arch/at91_rstc.h> -#include <asm/arch/io.h> - -/* - * We're using the AT91CAP9/SAM9 PITC in 32 bit mode, by - * setting the 20 bit counter period to its maximum (0xfffff). - */ -#define TIMER_LOAD_VAL 0xfffff -#define READ_RESET_TIMER at91_sys_read(AT91_PIT_PIVR) -#define READ_TIMER at91_sys_read(AT91_PIT_PIIR) -#define TIMER_FREQ (AT91C_MASTER_CLOCK << 4) -#define TICKS_TO_USEC(ticks) ((ticks) / 6) - -ulong get_timer_masked(void); -ulong resettime; - -/* nothing really to do with interrupts, just starts up a counter. */ -int timer_init(void) -{ - /* - * Enable PITC Clock - * The clock is already enabled for system controller in boot - */ - at91_sys_write(AT91_PMC_PCER, 1 << AT91_ID_SYS); - - /* Enable PITC */ - at91_sys_write(AT91_PIT_MR, TIMER_LOAD_VAL | AT91_PIT_PITEN); - - reset_timer_masked(); - - return 0; -} - -/* - * timer without interrupts - */ - -static inline ulong get_timer_raw(void) -{ - ulong now = READ_TIMER; - - if (now >= resettime) - return now - resettime; - else - return 0xFFFFFFFFUL - (resettime - now) ; -} - -void reset_timer_masked(void) -{ - resettime = READ_TIMER; -} - -ulong get_timer_masked(void) -{ - return TICKS_TO_USEC(get_timer_raw()); - -} - -void udelay_masked(unsigned long usec) -{ - ulong tmp; - - tmp = get_timer(0); - while (get_timer(tmp) < usec) /* our timer works in usecs */ - ; /* NOP */ -} - -void reset_timer(void) -{ - reset_timer_masked(); -} - -ulong get_timer(ulong base) -{ - ulong now = get_timer_masked(); - - if (now >= base) - return now - base; - else - return TICKS_TO_USEC(0xFFFFFFFFUL) - (base - now) ; -} - -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 = CFG_HZ; - return tbclk; -} - -/* - * Reset the cpu by setting up the watchdog timer and let him time out. - */ -void reset_cpu(ulong ignored) -{ - /* this is the way Linux does it */ - at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | - AT91_RSTC_PROCRST | - AT91_RSTC_PERRST); - - while (1); - /* Never reached */ -} |