aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorwdenk <wdenk>2004-10-11 22:25:49 +0000
committerwdenk <wdenk>2004-10-11 22:25:49 +0000
commit9455b7f39cecbcd869b1ba49a1307cb97e67360f (patch)
treeb2e8a6ec899c8524315d1a07fb89f795adf2c850
parente1599e83d643c1667a4157d03609c6e29928fb2e (diff)
downloadu-boot-linaro-stable-9455b7f39cecbcd869b1ba49a1307cb97e67360f.tar.gz
Fix CFG_HZ problems on AT91RM9200 systems
[Remember: CFG_HZ should be 1000 on ALL systems!]
-rw-r--r--CHANGELOG3
-rw-r--r--cpu/at91rm9200/interrupts.c26
-rw-r--r--include/configs/at91rm9200dk.h3
-rw-r--r--include/configs/cmc_pu2.h6
4 files changed, 28 insertions, 10 deletions
diff --git a/CHANGELOG b/CHANGELOG
index c0aa327a2..a561208f0 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,9 @@
Changes since U-Boot 1.1.1:
======================================================================
+* Fix CFG_HZ problems on AT91RM9200 systems
+ [Remember: CFG_HZ should be 1000 on ALL systems!]
+
* Patch by Gridish Shlomi, 30 Aug 2004:
- Add support to revA version of PQ27 and PQ27E.
- Reverted MPC8260ADS baudrate back to original 115200
diff --git a/cpu/at91rm9200/interrupts.c b/cpu/at91rm9200/interrupts.c
index d3adc4373..1c071bbf3 100644
--- a/cpu/at91rm9200/interrupts.c
+++ b/cpu/at91rm9200/interrupts.c
@@ -37,8 +37,8 @@
extern void reset_cpu(ulong addr);
-/* we always count down the max. */
-#define TIMER_LOAD_VAL 0xffff
+/* the number of clocks per CFG_HZ */
+#define TIMER_LOAD_VAL (CFG_HZ_CLOCK/CFG_HZ)
/* macro to read the 16 bit timer */
#define READ_TIMER (tmr->TC_CV & 0x0000ffff)
@@ -165,11 +165,13 @@ int interrupt_init (void)
*AT91C_TCB0_BCR = 0;
*AT91C_TCB0_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_NONE | AT91C_TCB_TC2XC2S_NONE;
tmr->TC_CCR = AT91C_TC_CLKDIS;
- tmr->TC_CMR = AT91C_TC_TIMER_DIV1_CLOCK; /* set to MCLK/2 */
+#define AT91C_TC_CMR_CPCTRG (1 << 14)
+ /* set to MCLK/2 and restart the timer when the vlaue in TC_RC is reached */
+ tmr->TC_CMR = AT91C_TC_TIMER_DIV1_CLOCK | AT91C_TC_CMR_CPCTRG;
tmr->TC_IDR = ~0ul;
tmr->TC_RC = TIMER_LOAD_VAL;
- lastinc = TIMER_LOAD_VAL;
+ lastinc = 0;
tmr->TC_CCR = AT91C_TC_SWTRG | AT91C_TC_CLKEN;
timestamp = 0;
@@ -207,7 +209,7 @@ void reset_timer_masked (void)
timestamp = 0;
}
-ulong get_timer_masked (void)
+ulong get_timer_raw (void)
{
ulong now = READ_TIMER;
@@ -223,17 +225,27 @@ ulong get_timer_masked (void)
return timestamp;
}
+ulong get_timer_masked (void)
+{
+ return get_timer_raw()/TIMER_LOAD_VAL;
+}
+
void udelay_masked (unsigned long usec)
{
ulong tmo;
+#if 0 /* doesn't work for usec < 1000 */
tmo = usec / 1000;
- tmo *= CFG_HZ;
+ tmo *= CFG_HZ_CLOCK;
+#else
+ tmo = CFG_HZ_CLOCK / 1000;
+ tmo *= usec;
+#endif
tmo /= 1000;
reset_timer_masked ();
- while (get_timer_masked () < tmo)
+ while (get_timer_raw () < tmo)
/*NOP*/;
}
diff --git a/include/configs/at91rm9200dk.h b/include/configs/at91rm9200dk.h
index dbc430dd7..fb8a6100b 100644
--- a/include/configs/at91rm9200dk.h
+++ b/include/configs/at91rm9200dk.h
@@ -182,7 +182,8 @@ struct bd_info_ext {
};
#endif
-#define CFG_HZ AT91C_MASTER_CLOCK/2 /* AT91C_TC0_CMR is implicitly set to */
+#define CFG_HZ 1000
+#define CFG_HZ_CLOCK AT91C_MASTER_CLOCK/2 /* AT91C_TC0_CMR is implicitly set to */
/* AT91C_TC_TIMER_DIV1_CLOCK */
#define CONFIG_STACKSIZE (32*1024) /* regular stack */
diff --git a/include/configs/cmc_pu2.h b/include/configs/cmc_pu2.h
index 03f5dde8e..a08b791c2 100644
--- a/include/configs/cmc_pu2.h
+++ b/include/configs/cmc_pu2.h
@@ -71,7 +71,7 @@
#undef CONFIG_MODEM_SUPPORT /* disable modem initialization stuff */
-#define CONFIG_HARD_I2C
+#undef CONFIG_HARD_I2C
#ifdef CONFIG_HARD_I2C
#define CFG_I2C_SPEED 0 /* not used */
@@ -90,6 +90,7 @@
#define CONFIG_COMMANDS \
((CONFIG_CMD_DFL | \
CFG_CMD_I2C | \
+ CFG_CMD_DATE | \
CFG_CMD_EEPROM | \
CFG_CMD_DHCP ) & \
~(CFG_CMD_BDI | \
@@ -213,7 +214,8 @@ struct bd_info_ext {
};
#endif
-#define CFG_HZ AT91C_MASTER_CLOCK/2 /* AT91C_TC0_CMR is implicitly set to */
+#define CFG_HZ 1000
+#define CFG_HZ_CLOCK AT91C_MASTER_CLOCK/2 /* AT91C_TC0_CMR is implicitly set to */
/* AT91C_TC_TIMER_DIV1_CLOCK */
#define CONFIG_STACKSIZE (32*1024) /* regular stack */