svn_rev_112

4 files changed, 336 insertions, 0 deletions

diff --git a/board/scb9328/Makefile b/board/scb9328/Makefile
new file mode 100644
index 0000000000..3ea2ae775b
--- /dev/null
+++ b/board/scb9328/Makefile
@@ -0,0 +1,4 @@
+
+obj-y += lowlevel_init.o
+obj-y += scb9328.o
+
diff --git a/board/scb9328/lowlevel_init.S b/board/scb9328/lowlevel_init.S
new file mode 100644
index 0000000000..ba3b6d2418
--- /dev/null
+++ b/board/scb9328/lowlevel_init.S
@@ -0,0 +1,203 @@
+/*
+ * Copyright (C) 2004 Sascha Hauer, Synertronixx GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ */
+
+#include <config.h>
+#include <version.h>
+#include <asm/arch/imx-regs.h>
+
+.globl lowlevel_init
+lowlevel_init:
+
+	mov	r10, lr
+
+/* Change PERCLK1DIV to 14 ie 14+1 */
+	ldr		r0,	=PCDR
+	ldr		r1,	=CFG_PCDR_VAL
+	str		r1,   [r0]
+
+/* set MCU PLL Control Register 0 */
+
+	ldr		r0,	=MPCTL0
+	ldr		r1,	=CFG_MPCTL0_VAL
+	str		r1,   [r0]
+
+/* set mpll restart bit */
+	ldr		r0, =CSCR
+	ldr		r1, [r0]
+	orr		r1,r1,#(1<<21)
+	str		r1, [r0]
+
+	mov		r2,#0x10
+1:
+	mov		r3,#0x2000
+2:
+	subs	r3,r3,#1
+	bne		2b
+
+	subs	r2,r2,#1
+	bne		1b
+
+/* set System PLL Control Register 0 */
+
+	ldr		r0,	=SPCTL0
+	ldr		r1,	=CFG_SPCTL0_VAL
+	str		r1,   [r0]
+
+/* set spll restart bit */
+	ldr		r0, =CSCR
+	ldr		r1, [r0]
+	orr		r1,r1,#(1<<22)
+	str		r1, [r0]
+
+	mov		r2,#0x10
+1:
+	mov		r3,#0x2000
+2:
+	subs	r3,r3,#1
+	bne		2b
+
+	subs	r2,r2,#1
+	bne		1b
+
+	ldr		r0,   =CSCR
+	ldr		r1,   =CFG_CSCR_VAL
+	str		r1,   [r0]
+
+/* I have now read the ARM920 DataSheet back-to-Back, and have stumbled upon
+ *this.....
+ *
+ * It would appear that from a Cold-Boot the ARM920T enters "FastBus" mode CP15
+ * register 1, this stops it using the output of the PLL and thus runs at the
+ * slow rate. Unless you place the Core into "Asynch" mode, the CPU will never
+ * use the value set in the CM_OSC registers...regardless of what you set it
+ * too!  Thus, although i thought i was running at 140MHz, i'm actually running
+ * at 40!..
+
+ * Slapping this into my bootloader does the trick...
+
+ * MRC p15,0,r0,c1,c0,0    ; read core configuration register
+ * ORR r0,r0,#0xC0000000   ; set asynchronous clocks and not fastbus mode
+ * MCR p15,0,r0,c1,c0,0    ; write modified value to core configuration
+ * register
+ */
+	MRC p15,0,r0,c1,c0,0
+	ORR r0,r0,#0xC0000000
+	MCR p15,0,r0,c1,c0,0
+
+	ldr		r0,	=GPR(0)
+	ldr		r1,	=CFG_GPR_A_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GIUS(0)
+	ldr		r1,	=CFG_GIUS_A_VAL
+	str		r1,   [r0]
+
+/* CS3 becomes CS3 by clearing reset default bit 1 in FMCR */
+
+	ldr		r0,	=FMCR
+	ldr		r1,	=CFG_FMCR_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS0U
+	ldr		r1,	=CFG_CS0U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS0L
+	ldr		r1,	=CFG_CS0L_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS1U
+	ldr		r1,	=CFG_CS1U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS1L
+	ldr		r1,	=CFG_CS1L_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS2U
+	ldr		r1,	=CFG_CS2U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS2L
+	ldr		r1,	=CFG_CS2L_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS3U
+	ldr		r1,	=CFG_CS3U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS3L
+	ldr		r1,	=CFG_CS3L_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS4U
+	ldr		r1,	=CFG_CS4U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS4L
+	ldr		r1,	=CFG_CS4L_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS5U
+	ldr		r1,	=CFG_CS5U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS5L
+	ldr		r1,	=CFG_CS5L_VAL
+	str		r1,   [r0]
+
+/* SDRAM Setup */
+
+	ldr		r0, =SDCTL0
+	ldr		r1, =PRECHARGE_CMD
+	str		r1,   [r0]
+
+	ldr		r0, =0x08200000
+	ldr		r1, =0x0 /* Issue Precharge all Command */
+	str		r1,   [r0]
+
+	ldr		r0, =SDCTL0
+	ldr		r1, =AUTOREFRESH_CMD
+	str		r1,   [r0]
+
+	ldr		r0, =0x08000000
+	ldr		r1, =0x0 /* Issue AutoRefresh Command */
+	str		r1,   [r0]
+	str		r1,   [r0]
+	str		r1,   [r0]
+	str		r1,   [r0]
+	str		r1,   [r0]
+	str		r1,   [r0]
+	str		r1,   [r0]
+	str		r1,   [r0]
+
+	ldr		r0, =SDCTL0
+	ldr		r1, =0xb10a8300
+	str		r1,   [r0]
+
+	ldr		r0, =0x08223000 /* CAS Latency 2 */
+	ldr		r1, =0x0   /* Issue Mode Register Command, Burst Length = 8 */
+	str		r1,   [r0]
+
+	ldr		r0, =SDCTL0
+	ldr		r1, =0x810a8200 /* Set to Normal Mode CAS 2 */
+	str		r1,   [r0]
+
+	mov	pc,r10
diff --git a/board/scb9328/scb9328.c b/board/scb9328/scb9328.c
new file mode 100644
index 0000000000..3f6831be5e
--- /dev/null
+++ b/board/scb9328/scb9328.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2004 Sascha Hauer, Synertronixx GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_SHOW_BOOT_PROGRESS
+# define SHOW_BOOT_PROGRESS(arg)        show_boot_progress(arg)
+#else
+# define SHOW_BOOT_PROGRESS(arg)
+#endif
+
+int board_init (void)
+{
+	gd->bd->bi_arch_number = MACH_TYPE_SCB9328;
+	gd->bd->bi_boot_params = 0x08000100;
+
+	return 0;
+}
+
+int dram_init (void)
+{
+#if ( CONFIG_NR_DRAM_BANKS > 0 )
+	gd->bd->bi_dram[0].start = SCB9328_SDRAM_1;
+	gd->bd->bi_dram[0].size = SCB9328_SDRAM_1_SIZE;
+#endif
+#if ( CONFIG_NR_DRAM_BANKS > 1 )
+	gd->bd->bi_dram[1].start = SCB9328_SDRAM_2;
+	gd->bd->bi_dram[1].size = SCB9328_SDRAM_2_SIZE;
+#endif
+#if ( CONFIG_NR_DRAM_BANKS > 2 )
+	gd->bd->bi_dram[2].start = SCB9328_SDRAM_3;
+	gd->bd->bi_dram[2].size = SCB9328_SDRAM_3_SIZE;
+#endif
+#if ( CONFIG_NR_DRAM_BANKS > 3 )
+	gd->bd->bi_dram[3].start = SCB9328_SDRAM_4;
+	gd->bd->bi_dram[3].size = SCB9328_SDRAM_4_SIZE;
+#endif
+	return 0;
+}
+
+/**
+ * show_boot_progress: - indicate state of the boot process
+ *
+ * @param status: Status number - see README for details.
+ *
+ * The CSB226 does only have 3 LEDs, so we switch them on at the most
+ * important states (1, 5, 15).
+ */
+
+void show_boot_progress (int status)
+{
+	return;
+}
diff --git a/board/scb9328/u-boot.lds b/board/scb9328/u-boot.lds
new file mode 100644
index 0000000000..1d1669cdea
--- /dev/null
+++ b/board/scb9328/u-boot.lds
@@ -0,0 +1,57 @@
+/*
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+	. = 0x00000000;
+
+	. = ALIGN(4);
+	.text      :
+	{
+		cpu/arm920t/start.o	(.text)
+		*(.text)
+	}
+
+	. = ALIGN(4);
+	.rodata : { *(.rodata) }
+
+	. = ALIGN(4);
+	.data : { *(.data) }
+
+	. = ALIGN(4);
+	.got : { *(.got) }
+
+	. = .;
+	__u_boot_cmd_start = .;
+	.u_boot_cmd : { *(.u_boot_cmd) }
+	__u_boot_cmd_end = .;
+
+	. = ALIGN(4);
+	__bss_start = .;
+	.bss : { *(.bss) }
+	_end = .;
+}