From 9455b7f39cecbcd869b1ba49a1307cb97e67360f Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Mon, 11 Oct 2004 22:25:49 +0000
Subject: [PATCH] Fix CFG_HZ problems on AT91RM9200 systems [Remember: CFG_HZ
 should be 1000 on ALL systems!]

---
 CHANGELOG                      |  3 +++
 cpu/at91rm9200/interrupts.c    | 26 +++++++++++++++++++-------
 include/configs/at91rm9200dk.h |  3 ++-
 include/configs/cmc_pu2.h      |  6 ++++--
 4 files changed, 28 insertions(+), 10 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index c0aa327a24..a561208f0d 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 d3adc43738..1c071bbf3d 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 dbc430dd7c..fb8a6100b5 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 03f5dde8e4..a08b791c2e 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 */
-- 
2.39.5