[U-Boot] [PATCH v2 9/9] ARM: versatile: convert to common timer code

Rob Herring
2013-10-04T15:22:48Z

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
--
1.8.1.2