Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD plagnioj@jcrosoft.com Cc: Peter Pearse Peter.Pearse@arm.com --- board/armltd/integratorap/Makefile | 1 + board/armltd/integratorap/integratorap.c | 135 ----------------------- board/armltd/integratorap/timer.c | 171 ++++++++++++++++++++++++++++++ 3 files changed, 172 insertions(+), 135 deletions(-) create mode 100644 board/armltd/integratorap/timer.c
diff --git a/board/armltd/integratorap/Makefile b/board/armltd/integratorap/Makefile index a6193c7..1af37f3 100644 --- a/board/armltd/integratorap/Makefile +++ b/board/armltd/integratorap/Makefile @@ -34,6 +34,7 @@ SOBJS-y := lowlevel_init.o COBJS-y := integratorap.o COBJS-y += flash.o COBJS-$(CONFIG_PCI) += pci.o +COBJS-y += timer.o
SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c) COBJS := $(addprefix $(obj),$(COBJS-y)) diff --git a/board/armltd/integratorap/integratorap.c b/board/armltd/integratorap/integratorap.c index d458fe6..b20b129 100644 --- a/board/armltd/integratorap/integratorap.c +++ b/board/armltd/integratorap/integratorap.c @@ -149,141 +149,6 @@ extern void dram_query(void); return 0; }
-/* The Integrator/AP timer1 is clocked at 24MHz - * can be divided by 16 or 256 - * and is a 16-bit counter - */ -/* U-Boot expects a 32 bit timer running at CONFIG_SYS_HZ*/ -static ulong timestamp; /* U-Boot ticks since startup */ -static ulong total_count = 0; /* Total timer count */ -static ulong lastdec; /* Timer reading at last call */ -static ulong div_clock = 256; /* Divisor applied to the timer clock */ -static ulong div_timer = 1; /* Divisor to convert timer reading - * change to U-Boot ticks - */ -/* CONFIG_SYS_HZ = CONFIG_SYS_HZ_CLOCK/(div_clock * div_timer) */ - -#define TIMER_LOAD_VAL 0x0000FFFFL -#define READ_TIMER ((*(volatile ulong *)(CONFIG_SYS_TIMERBASE+4)) & 0x0000FFFFL) - -/* all function return values in U-Boot ticks i.e. (1/CONFIG_SYS_HZ) sec - * - unless otherwise stated - */ - -/* starts a counter - * - the Integrator/AP timer issues an interrupt - * each time it reaches zero - */ -int timer_init (void) -{ - /* Load timer with initial value */ - *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 0) = TIMER_LOAD_VAL; - /* Set timer to be - * enabled 1 - * free-running 0 - * XX 00 - * divider 256 10 - * XX 00 - */ - *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = 0x00000088; - total_count = 0; - /* init the timestamp and lastdec value */ - reset_timer_masked(); - - div_timer = CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ; - div_timer /= div_clock; - - return (0); -} - -/* - * timer without interrupts - */ -void reset_timer (void) -{ - reset_timer_masked (); -} - -ulong get_timer (ulong base_ticks) -{ - return get_timer_masked () - base_ticks; -} - -void set_timer (ulong ticks) -{ - timestamp = ticks; - total_count = ticks * div_timer; - reset_timer_masked(); -} - -/* delay x useconds */ -void udelay (unsigned long usec) -{ - ulong tmo, tmp; - - /* Convert to U-Boot ticks */ - tmo = usec * CONFIG_SYS_HZ; - tmo /= (1000000L); - - tmp = get_timer_masked(); /* get current timestamp */ - tmo += tmp; /* wake up timestamp */ - - while (get_timer_masked () < tmo) { /* loop till event */ - /*NOP*/; - } -} - -void reset_timer_masked (void) -{ - /* reset time */ - lastdec = READ_TIMER; /* capture current decrementer value */ - timestamp = 0; /* start "advancing" time stamp from 0 */ -} - -/* converts the timer reading to U-Boot ticks */ -/* the timestamp is the number of ticks since reset */ -/* This routine does not detect wraps unless called regularly - ASSUMES a call at least every 16 seconds to detect every reload */ -ulong get_timer_masked (void) -{ - ulong now = READ_TIMER; /* current count */ - - if (now > lastdec) { - /* Must have wrapped */ - total_count += lastdec + TIMER_LOAD_VAL + 1 - now; - } else { - total_count += lastdec - now; - } - lastdec = now; - timestamp = total_count/div_timer; - - return timestamp; -} - -/* waits specified delay value and resets timestamp */ -void udelay_masked (unsigned long usec) -{ - udelay(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); -} - -/* - * Return the timebase clock frequency - * i.e. how often the timer decrements - */ -ulong get_tbclk (void) -{ - return CONFIG_SYS_HZ_CLOCK/div_clock; -} - int board_eth_init(bd_t *bis) { return pci_eth_init(bis); diff --git a/board/armltd/integratorap/timer.c b/board/armltd/integratorap/timer.c new file mode 100644 index 0000000..e85f8b6 --- /dev/null +++ b/board/armltd/integratorap/timer.c @@ -0,0 +1,171 @@ +/* + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger mgroeger@sysgo.de + * + * (C) Copyright 2002 + * David Mueller, ELSOFT AG, d.mueller@elsoft.ch + * + * (C) Copyright 2003 + * Texas Instruments, <www.ti.com> + * Kshitij Gupta Kshitij@ti.com + * + * (C) Copyright 2004 + * ARM Ltd. + * Philippe Robin, philippe.robin@arm.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> + +/* The Integrator/AP timer1 is clocked at 24MHz + * can be divided by 16 or 256 + * and is a 16-bit counter + */ +/* U-Boot expects a 32 bit timer running at CONFIG_SYS_HZ*/ +static ulong timestamp; /* U-Boot ticks since startup */ +static ulong total_count = 0; /* Total timer count */ +static ulong lastdec; /* Timer reading at last call */ +static ulong div_clock = 256; /* Divisor applied to the timer clock */ +static ulong div_timer = 1; /* Divisor to convert timer reading + * change to U-Boot ticks + */ +/* CONFIG_SYS_HZ = CONFIG_SYS_HZ_CLOCK/(div_clock * div_timer) */ + +#define TIMER_LOAD_VAL 0x0000FFFFL +#define READ_TIMER ((*(volatile ulong *)(CONFIG_SYS_TIMERBASE+4)) & 0x0000FFFFL) + +/* all function return values in U-Boot ticks i.e. (1/CONFIG_SYS_HZ) sec + * - unless otherwise stated + */ + +/* starts a counter + * - the Integrator/AP timer issues an interrupt + * each time it reaches zero + */ +int timer_init (void) +{ + /* Load timer with initial value */ + *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 0) = TIMER_LOAD_VAL; + /* Set timer to be + * enabled 1 + * free-running 0 + * XX 00 + * divider 256 10 + * XX 00 + */ + *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = 0x00000088; + total_count = 0; + /* init the timestamp and lastdec value */ + reset_timer_masked(); + + div_timer = CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ; + div_timer /= div_clock; + + return (0); +} + +/* + * timer without interrupts + */ +void reset_timer (void) +{ + reset_timer_masked (); +} + +ulong get_timer (ulong base_ticks) +{ + return get_timer_masked () - base_ticks; +} + +void set_timer (ulong ticks) +{ + timestamp = ticks; + total_count = ticks * div_timer; + reset_timer_masked(); +} + +/* delay x useconds */ +void udelay (unsigned long usec) +{ + ulong tmo, tmp; + + /* Convert to U-Boot ticks */ + tmo = usec * CONFIG_SYS_HZ; + tmo /= (1000000L); + + tmp = get_timer_masked(); /* get current timestamp */ + tmo += tmp; /* wake up timestamp */ + + while (get_timer_masked () < tmo) { /* loop till event */ + /*NOP*/; + } +} + +void reset_timer_masked (void) +{ + /* reset time */ + lastdec = READ_TIMER; /* capture current decrementer value */ + timestamp = 0; /* start "advancing" time stamp from 0 */ +} + +/* converts the timer reading to U-Boot ticks */ +/* the timestamp is the number of ticks since reset */ +/* This routine does not detect wraps unless called regularly + ASSUMES a call at least every 16 seconds to detect every reload */ +ulong get_timer_masked (void) +{ + ulong now = READ_TIMER; /* current count */ + + if (now > lastdec) { + /* Must have wrapped */ + total_count += lastdec + TIMER_LOAD_VAL + 1 - now; + } else { + total_count += lastdec - now; + } + lastdec = now; + timestamp = total_count/div_timer; + + return timestamp; +} + +/* waits specified delay value and resets timestamp */ +void udelay_masked (unsigned long usec) +{ + udelay(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); +} + +/* + * Return the timebase clock frequency + * i.e. how often the timer decrements + */ +ulong get_tbclk (void) +{ + return CONFIG_SYS_HZ_CLOCK/div_clock; +}