From: Rob Herring rob.herring@calxeda.com
Convert versatile to use the commmon timer code.
Signed-off-by: Rob Herring rob.herring@calxeda.com --- arch/arm/cpu/arm926ejs/versatile/timer.c | 116 ------------------------------- include/configs/versatile.h | 9 ++- 2 files changed, 4 insertions(+), 121 deletions(-)
diff --git a/arch/arm/cpu/arm926ejs/versatile/timer.c b/arch/arm/cpu/arm926ejs/versatile/timer.c index 5436162..f31d9bd 100644 --- a/arch/arm/cpu/arm926ejs/versatile/timer.c +++ b/arch/arm/cpu/arm926ejs/versatile/timer.c @@ -21,16 +21,6 @@
#include <common.h>
-#define TIMER_LOAD_VAL 0xffffffff - -/* macro to read the 32 bit timer */ -#define READ_TIMER (*(volatile ulong *)(CONFIG_SYS_TIMERBASE+4)) - -DECLARE_GLOBAL_DATA_PTR; - -#define timestamp gd->arch.tbl -#define lastdec gd->arch.lastinc - #define TIMER_ENABLE (1 << 7) #define TIMER_MODE_MSK (1 << 6) #define TIMER_MODE_FR (0 << 6) @@ -69,112 +59,6 @@ int timer_init (void)
*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = tmr_ctrl_val;
- /* init the timestamp and lastdec value */ - reset_timer_masked(); - return 0; }
-/* - * timer without interrupts - */ -ulong get_timer (ulong base) -{ - return get_timer_masked () - base; -} - -/* delay x useconds AND preserve advance timestamp value */ -void __udelay (unsigned long usec) -{ - ulong tmo, tmp; - - if(usec >= 1000){ /* if "big" number, spread normalization to seconds */ - tmo = usec / 1000; /* start to normalize for usec to ticks per sec */ - tmo *= CONFIG_SYS_HZ; /* find number of "ticks" to wait to achieve target */ - tmo /= 1000; /* finish normalize. */ - }else{ /* else small number, don't kill it prior to HZ multiply */ - tmo = usec * CONFIG_SYS_HZ; - tmo /= (1000*1000); - } - - tmp = get_timer (0); /* get current timestamp */ - if( (tmo + tmp + 1) < tmp ) /* if setting this fordward will roll time stamp */ - reset_timer_masked (); /* reset "advancing" timestamp to 0, set lastdec value */ - else - tmo += tmp; /* else, set advancing stamp wake up time */ - - while (get_timer_masked () < tmo)/* loop till event */ - /*NOP*/; -} - -void reset_timer_masked (void) -{ - /* reset time */ - lastdec = READ_TIMER; /* capure current decrementer value time */ - timestamp = 0; /* start "advancing" time stamp from 0 */ -} - -ulong get_timer_masked (void) -{ - ulong now = READ_TIMER; /* current tick value */ - - if (lastdec >= now) { /* normal mode (non roll) */ - /* normal mode */ - timestamp += lastdec - now; /* move stamp fordward with absoulte diff ticks */ - } else { /* we have overflow of the count down timer */ - /* nts = ts + ld + (TLV - now) - * ts=old stamp, ld=time that passed before passing through -1 - * (TLV-now) amount of time after passing though -1 - * nts = new "advancing time stamp"...it could also roll and cause problems. - */ - timestamp += lastdec + TIMER_LOAD_VAL - now; - } - lastdec = now; - - return timestamp; -} - -/* waits specified delay value and resets timestamp */ -void udelay_masked (unsigned long usec) -{ - ulong tmo; - ulong endtime; - signed long diff; - - if (usec >= 1000) { /* if "big" number, spread normalization to seconds */ - tmo = usec / 1000; /* start to normalize for usec to ticks per sec */ - tmo *= CONFIG_SYS_HZ; /* find number of "ticks" to wait to achieve target */ - tmo /= 1000; /* finish normalize. */ - } else { /* else small number, don't kill it prior to HZ multiply */ - tmo = usec * CONFIG_SYS_HZ; - tmo /= (1000*1000); - } - - endtime = get_timer_masked () + tmo; - - do { - ulong now = get_timer_masked (); - diff = endtime - now; - } while (diff >= 0); -} - -/* - * 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; -} diff --git a/include/configs/versatile.h b/include/configs/versatile.h index 8d3ff6a..0d23262 100644 --- a/include/configs/versatile.h +++ b/include/configs/versatile.h @@ -25,12 +25,11 @@
#define CONFIG_SYS_MEMTEST_START 0x100000 #define CONFIG_SYS_MEMTEST_END 0x10000000 -#define CONFIG_SYS_HZ (1000000 / 256) -#define CONFIG_SYS_TIMERBASE 0x101E2000 /* Timer 0 and 1 base */
-#define CONFIG_SYS_TIMER_INTERVAL 10000 -#define CONFIG_SYS_TIMER_RELOAD (CONFIG_SYS_TIMER_INTERVAL >> 4) -#define CONFIG_SYS_TIMER_CTRL 0x84 /* Enable, Clock / 16 */ +#define CONFIG_SYS_TIMERBASE 0x101E2000 /* Timer 0 and 1 base */ +#define CONFIG_SYS_TIMER_RATE (1000000 / 256) +#define CONFIG_SYS_TIMER_COUNTER (CONFIG_SYS_TIMERBASE + 0x4) +#define CONFIG_SYS_TIMER_COUNTS_DOWN
/* * control registers