From ed54e6212518262d27abe5e6de3c608d5ebceafb Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Wed, 24 Nov 2004 23:35:19 +0000
Subject: [PATCH] * Fix udelay() on AT91RM9200 for delays < 1 ms.

* Enable long help on CMC PU2 board;
  fix reset issue;
  increase CPU speed from 179 to 207 MHz.
---
 CHANGELOG                 |  6 ++++++
 board/cmc_pu2/memsetup.S  |  4 ++--
 cpu/at91rm9200/cpu.c      | 14 ++++++++++++++
 cpu/pxa/interrupts.c      | 11 ++++++++---
 include/configs/cmc_pu2.h | 10 +++++++---
 5 files changed, 37 insertions(+), 8 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index 13382605e5..217fa4eff3 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,12 @@
 Changes since U-Boot 1.1.1:
 ======================================================================
 
+* Fix udelay() on AT91RM9200 for delays < 1 ms.
+
+* Enable long help on CMC PU2 board;
+  fix reset issue;
+  increase CPU speed from 179 to 207 MHz.
+
 * Fix smc91111 ethernet driver for Xaeniax board (need to handle
   unaligned tail part specially).
 
diff --git a/board/cmc_pu2/memsetup.S b/board/cmc_pu2/memsetup.S
index b0c8d4c46c..317f16d077 100644
--- a/board/cmc_pu2/memsetup.S
+++ b/board/cmc_pu2/memsetup.S
@@ -57,11 +57,11 @@
 
 /* clocks */
 #define PLLAR 0xFFFFFC28
-#define PLLAR_VAL 0x20263E04 /* 179.712000 MHz for PCK */
+#define PLLAR_VAL 0x202CBE04 /* 207.360 MHz for PCK */
 #define PLLBR 0xFFFFFC2C
 #define PLLBR_VAL 0x10483E0E /* 48.054857 MHz (divider by 2 for USB) */
 #define MCKR 0xFFFFFC30
-#define MCKR_VAL 0x00000202 /* PCK/3 = MCK Master Clock = 59.904000MHz from PLLA */
+#define MCKR_VAL 0x00000202 /* PCK/3 = MCK Master Clock = 69.120MHz from PLLA */
 
 /* sdram */
 #define PIOC_ASR 0xFFFFF870
diff --git a/cpu/at91rm9200/cpu.c b/cpu/at91rm9200/cpu.c
index a464f29aeb..71463c957e 100644
--- a/cpu/at91rm9200/cpu.c
+++ b/cpu/at91rm9200/cpu.c
@@ -134,11 +134,25 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
    /*shutdown the console to avoid strange chars during reset */
    us->US_CR = (AT91C_US_RSTRX | AT91C_US_RSTTX);
 
+#ifdef CONFIG_AT91RM9200DK 
    /* Clear PA19 to trigger the hard reset */
    pio->PIO_CODR = 0x00080000;
    pio->PIO_OER  = 0x00080000;
    pio->PIO_PER  = 0x00080000;
+#endif
+#ifdef CONFIG_CMC_PU2
+/* this is the way Linux does it */
+#define AT91C_ST_RSTEN (0x1 << 16)
+#define AT91C_ST_EXTEN (0x1 << 17)
+#define AT91C_ST_WDRST (0x1 <<  0)
+/* watchdog mode register */
+#define ST_WDMR *((unsigned long *)0xfffffd08)
+/* system clock control register */
+#define ST_CR *((unsigned long *)0xfffffd00)
+	ST_WDMR = AT91C_ST_RSTEN | AT91C_ST_EXTEN | 1 ;
+	ST_CR = AT91C_ST_WDRST;
    /* Never reached */
+#endif
 #endif
    return 0;
 }
diff --git a/cpu/pxa/interrupts.c b/cpu/pxa/interrupts.c
index 8aec0b9dd6..fd02154b86 100644
--- a/cpu/pxa/interrupts.c
+++ b/cpu/pxa/interrupts.c
@@ -193,9 +193,14 @@ void udelay_masked (unsigned long usec)
 {
 	ulong tmo;
 
-	tmo = usec / 1000;
-	tmo *= CFG_HZ;
-	tmo /= 1000;
+	if (usec >= 1000) {
+		tmo = usec / 1000;
+		tmo *= CFG_HZ;
+		tmo /= 1000;
+	} else {
+		tmo = usec * CFG_HZ;
+		tmo /= (1000*1000);
+	}
 
 	reset_timer_masked ();
 
diff --git a/include/configs/cmc_pu2.h b/include/configs/cmc_pu2.h
index e144a67c6c..ff935be51f 100644
--- a/include/configs/cmc_pu2.h
+++ b/include/configs/cmc_pu2.h
@@ -32,8 +32,8 @@
 #define CONFIG_INIT_CRITICAL		/* undef for developing */
 
 /* ARM asynchronous clock */
-#define AT91C_MAIN_CLOCK	179712000	/* from 18.432 MHz crystal (18432000 / 4 * 39) */
-#define AT91C_MASTER_CLOCK	59904000	/* peripheral clock (AT91C_MASTER_CLOCK / 3) */
+#define AT91C_MAIN_CLOCK	207360000	/* from 18.432 MHz crystal (18432000 / 4 * 45) */
+#define AT91C_MASTER_CLOCK	69120000	/* peripheral clock (AT91C_MASTER_CLOCK / 3) */
 
 #define AT91_SLOW_CLOCK		32768	/* slow clock */
 
@@ -60,7 +60,7 @@
 
 #define CONFIG_BAUDRATE 9600
 
-#define CFG_AT91C_BRGR_DIVISOR	390	/* hardcode so no __divsi3 : AT91C_MASTER_CLOCK /(baudrate * 16) */
+#define CFG_AT91C_BRGR_DIVISOR	450	/* hardcode so no __divsi3 : AT91C_MASTER_CLOCK /(baudrate * 16) */
 
 /*
  * Hardware drivers
@@ -86,6 +86,8 @@
 #define CFG_I2C_EEPROM_ADDR_LEN 1
 #define CFG_I2C_EEPROM_ADDR_OVERFLOW
 #endif
+/* still about 20 kB free with this defined */
+#define CFG_LONGHELP
 
 #define CONFIG_BOOTDELAY      3
 /* #define CONFIG_ENV_OVERWRITE	1 */
@@ -114,6 +116,8 @@
 			CFG_CMD_MISC | \
 			CFG_CMD_LOADS ))
 #endif
+/* still about 20 kB free with this defined */
+#define CFG_LONGHELP
 
 /* this must be included AFTER the definition of CONFIG_COMMANDS (if any) */
 #include <cmd_confdefs.h>
-- 
2.25.1