Added initial eNET board support

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>

7 files changed, 513 insertions, 0 deletions

diff --git a/board/eNET/Makefile b/board/eNET/Makefile
new file mode 100644
index 0000000000..4813b4b53a
--- /dev/null
+++ b/board/eNET/Makefile
@@ -0,0 +1,57 @@
+#
+# (C) Copyright 2008
+# Graeme Russ, graeme.russ@gmail.com.
+#
+# (C) Copyright 2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2002
+# Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
+#
+# 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
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(BOARD).a
+
+COBJS	:= eNET.o
+SOBJS	:= eNET_start16.o eNET_start.o
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS))
+SOBJS	:= $(addprefix $(obj),$(SOBJS))
+
+$(LIB):	$(obj).depend $(OBJS) $(SOBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS) $(SOBJS)
+
+clean:
+	rm -f $(SOBJS) $(OBJS)
+
+distclean:	clean
+	rm -f $(LIB) core *.bak $(obj).depend
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/board/eNET/config.mk b/board/eNET/config.mk
new file mode 100644
index 0000000000..a76384130d
--- /dev/null
+++ b/board/eNET/config.mk
@@ -0,0 +1,24 @@
+#
+# (C) Copyright 2002
+# Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
+#
+# 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
+#
+
+TEXT_BASE = 0x38040000
diff --git a/board/eNET/eNET.c b/board/eNET/eNET.c
new file mode 100644
index 0000000000..57dd6359e7
--- /dev/null
+++ b/board/eNET/eNET.c
@@ -0,0 +1,167 @@
+/*
+ * (C) Copyright 2008
+ * Graeme Russ, graeme.russ@gmail.com.
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/ic/sc520.h>
+
+#ifdef CONFIG_HW_WATCHDOG
+#include <watchdog.h>
+#endif
+
+#include "hardware.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#undef SC520_CDP_DEBUG
+
+#ifdef	SC520_CDP_DEBUG
+#define	PRINTF(fmt,args...)	printf (fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+
+unsigned long monitor_flash_len = CONFIG_SYS_MONITOR_LEN;
+
+void init_sc520_enet (void)
+{
+	/* Set CPU Speed to 100MHz */
+	write_mmcr_byte(SC520_CPUCTL, 1);
+	gd->cpu_clk = 100000000;
+
+	/* wait at least one millisecond */
+	asm("movl	$0x2000,%%ecx\n"
+	    "wait_loop:	pushl %%ecx\n"
+	    "popl	%%ecx\n"
+	    "loop wait_loop\n": : : "ecx");
+
+	/* turn on the SDRAM write buffer */
+	write_mmcr_byte(SC520_DBCTL, 0x11);
+
+	/* turn on the cache and disable write through */
+	asm("movl	%%cr0, %%eax\n"
+	    "andl	$0x9fffffff, %%eax\n"
+	    "movl	%%eax, %%cr0\n"  : : : "eax");
+}
+
+/*
+ * Miscellaneous platform dependent initializations
+ */
+int board_init(void)
+{
+	init_sc520_enet();
+
+	write_mmcr_byte(SC520_GPCSRT, 0x01);		/* GP Chip Select Recovery Time */
+	write_mmcr_byte(SC520_GPCSPW, 0x07);		/* GP Chip Select Pulse Width */
+	write_mmcr_byte(SC520_GPCSOFF, 0x00);		/* GP Chip Select Offset */
+	write_mmcr_byte(SC520_GPRDW, 0x05);		/* GP Read pulse width */
+	write_mmcr_byte(SC520_GPRDOFF, 0x01);		/* GP Read offset */
+	write_mmcr_byte(SC520_GPWRW, 0x05);		/* GP Write pulse width */
+	write_mmcr_byte(SC520_GPWROFF, 0x01);		/* GP Write offset */
+
+	write_mmcr_word(SC520_PIODATA15_0, 0x0630);	/* PIO15_PIO0 Data */
+	write_mmcr_word(SC520_PIODATA31_16, 0x2000);	/* PIO31_PIO16 Data */
+	write_mmcr_word(SC520_PIODIR31_16, 0x2000);	/* GPIO Direction */
+	write_mmcr_word(SC520_PIODIR15_0, 0x87b5);	/* GPIO Direction */
+	write_mmcr_word(SC520_PIOPFS31_16, 0x0dfe);	/* GPIO pin function 31-16 reg */
+	write_mmcr_word(SC520_PIOPFS15_0, 0x200a);	/* GPIO pin function 15-0 reg */
+	write_mmcr_byte(SC520_CSPFS, 0x00f8);		/* Chip Select Pin Function Select */
+
+	write_mmcr_long(SC520_PAR2, 0x200713f8);	/* Uart A (GPCS0, 0x013f8, 8 Bytes) */
+	write_mmcr_long(SC520_PAR3, 0x2c0712f8);	/* Uart B (GPCS3, 0x012f8, 8 Bytes) */
+	write_mmcr_long(SC520_PAR4, 0x300711f8);	/* Uart C (GPCS4, 0x011f8, 8 Bytes) */
+	write_mmcr_long(SC520_PAR5, 0x340710f8);	/* Uart D (GPCS5, 0x010f8, 8 Bytes) */
+	write_mmcr_long(SC520_PAR6, 0xe3ffc000);	/* SDRAM (0x00000000, 128MB) */
+	write_mmcr_long(SC520_PAR7, 0xaa3fd000);	/* StrataFlash (ROMCS1, 0x10000000, 16MB) */
+	write_mmcr_long(SC520_PAR8, 0xca3fd100);	/* StrataFlash (ROMCS2, 0x11000000, 16MB) */
+	write_mmcr_long(SC520_PAR9, 0x4203d900);	/* SRAM (GPCS0, 0x19000000, 1MB) */
+	write_mmcr_long(SC520_PAR10, 0x4e03d910);	/* SRAM (GPCS3, 0x19100000, 1MB) */
+	write_mmcr_long(SC520_PAR11, 0x50018100);	/* DP-RAM (GPCS4, 0x18100000, 4kB) */
+	write_mmcr_long(SC520_PAR12, 0x54020000);	/* CFLASH1 (0x200000000, 4kB) */
+	write_mmcr_long(SC520_PAR13, 0x5c020001);	/* CFLASH2 (0x200010000, 4kB) */
+/*	write_mmcr_long(SC520_PAR14, 0x8bfff800); */	/* BOOTCS at  0x18000000 */
+/*	write_mmcr_long(SC520_PAR15, 0x38201000); */	/* LEDs etc (GPCS6, 0x1000, 20 Bytes */
+
+	/* Disable Watchdog */
+	write_mmcr_word(0x0cb0, 0x3333);
+	write_mmcr_word(0x0cb0, 0xcccc);
+	write_mmcr_word(0x0cb0, 0x0000);
+
+	/* Chip Select Configuration */
+	write_mmcr_word(SC520_BOOTCSCTL, 0x0033);
+	write_mmcr_word(SC520_ROMCS1CTL, 0x0615);
+	write_mmcr_word(SC520_ROMCS2CTL, 0x0615);
+
+	write_mmcr_byte(SC520_ADDDECCTL, 0x02);
+	write_mmcr_byte(SC520_UART1CTL, 0x07);
+	write_mmcr_byte(SC520_SYSARBCTL,0x06);
+	write_mmcr_word(SC520_SYSARBMENB, 0x0003);
+
+	/* Crystal is 33.000MHz */
+	gd->bus_clk = 33000000;
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	init_sc520_dram();
+	return 0;
+}
+
+void show_boot_progress(int val)
+{
+	uchar led_mask;
+
+	led_mask = 0x00;
+
+	if (val < 0)
+		led_mask |= LED_ERR_BITMASK;
+
+	led_mask |= (uchar)(val & 0x001f);
+	outb(led_mask, LED_LATCH_ADDRESS);
+}
+
+
+int last_stage_init(void)
+{
+	int minor;
+	int major;
+
+	major = minor = 0;
+
+	printf("Serck Controls eNET\n");
+
+	return 0;
+}
+
+ulong board_flash_get_legacy (ulong base, int banknum, flash_info_t * info)
+{
+	if (banknum == 0) {	/* non-CFI boot flash */
+		info->portwidth = FLASH_CFI_8BIT;
+		info->chipwidth = FLASH_CFI_BY8;
+		info->interface = FLASH_CFI_X8;
+		return 1;
+	} else
+		return 0;
+}
diff --git a/board/eNET/eNET_start.S b/board/eNET/eNET_start.S
new file mode 100644
index 0000000000..1b07d622f7
--- /dev/null
+++ b/board/eNET/eNET_start.S
@@ -0,0 +1,50 @@
+/*
+ * (C) Copyright 2008
+ * Graeme Russ, graeme.russ@gmail.com.
+ *
+ * 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
+ */
+
+#include "hardware.h"
+
+/* board early intialization */
+.globl early_board_init
+early_board_init:
+	/* No 32-bit board specific initialisation */
+	jmp	*%ebp		/* return to caller */
+
+.globl show_boot_progress_asm
+show_boot_progress_asm:
+
+	movb	%al, %dl	/* Create Working Copy */
+	andb	$0x80, %dl	/* Mask in only Error bit */
+	shrb	$0x02, %dl	/* Shift Error bit to Error LED */
+	andb	$0x0f, %al	/* Mask out 'Error' bit */
+	orb	%dl, %al	/* Mask in ERR LED */
+	movw	$LED_LATCH_ADDRESS, %dx
+	outb	%al, %dx
+	jmp	*%ebp		/* return to caller */
+
+.globl cpu_halt_asm
+cpu_halt_asm:
+	movb	$0x0f, %al
+	movw	$LED_LATCH_ADDRESS, %dx
+	outb	%al, %dx
+	hlt
+	jmp cpu_halt_asm
diff --git a/board/eNET/eNET_start16.S b/board/eNET/eNET_start16.S
new file mode 100644
index 0000000000..48e4d83a13
--- /dev/null
+++ b/board/eNET/eNET_start16.S
@@ -0,0 +1,90 @@
+/*
+ * (C) Copyright 2008
+ * Graeme Russ, graeme.russ@gmail.com.
+ *
+ * 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
+ */
+
+/*
+ * 16bit initialization code.
+ * This code have to map the area of the boot flash
+ * that is used by U-boot to its final destination.
+ */
+
+/* #include <asm/ic/sc520_defs.h> */
+
+#include "hardware.h"
+
+.text
+.section .start16, "ax"
+.code16
+.globl board_init16
+board_init16:
+	/* Alias MMCR to 0xdf000 */
+	movw	$0xfffc, %dx
+	movl	$0x800df0cb, %eax
+	outl	%eax, %dx
+
+	/* Set ds to point to MMCR alias */
+	movw	$0xdf00, %ax
+	movw	%ax, %ds
+
+	/* Map PAR for Boot Flash (BOOTCS, 512kB @ 0x380000000) */
+	movl    $0x00c0, %edi		/* SC520_PAR14 */
+	movl	$0x8bfff800, %eax	/* TODO: Check this */
+	movl	%eax, (%di)
+
+	/* Map PAR for LED, Hex Switches (GPCS6, 20 Bytes @ 0x1000) */
+	movl    $0x00c4, %edi		/* SC520_PAR15 */
+	movl	$0x38201000, %eax
+	movl	%eax, (%di)
+
+	/* Disable SDRAM write buffer */
+	movw    $0x0040, %di		/* SC520_DBCTL */
+	xorw    %ax, %ax
+	movb    %al, (%di)
+
+	/* Disabe MMCR alias */
+	movw	$0xfffc, %dx
+	movl	$0x000000cb, %eax
+	outl	%eax, %dx
+
+	/* the return address is stored in bp */
+	jmp	*%bp
+
+.section .bios, "ax"
+.code16
+.globl realmode_reset
+realmode_reset:
+	/* Alias MMCR to 0xdf000 */
+	movw	$0xfffc, %dx
+	movl	$0x800df0cb, %eax
+	outl	%eax, %dx
+
+	/* Set ds to point to MMCR alias */
+	movw	$0xdf00, %ax
+	movw	%ax, %ds
+
+	/* issue software reset thorugh MMCR */
+	movl    $0xd72, %edi
+	movb	$0x01, %al
+	movb	%al, (%di)
+
+1:	hlt
+	jmp	1
diff --git a/board/eNET/hardware.h b/board/eNET/hardware.h
new file mode 100644
index 0000000000..42474a62fa
--- /dev/null
+++ b/board/eNET/hardware.h
@@ -0,0 +1,35 @@
+/*
+ * (C) Copyright 2008
+ * Graeme Russ, graeme.russ@gmail.com.
+ *
+ * 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
+ */
+
+#ifndef HARDWARE_H_
+#define HARDWARE_H_
+
+#define LED_LATCH_ADDRESS	0x1002
+#define LED_RUN_BITMASK		0x01
+#define LED_1_BITMASK		0x02
+#define LED_2_BITMASK		0x04
+#define LED_RX_BITMASK		0x08
+#define LED_TX_BITMASK		0x10
+#define LED_ERR_BITMASK		0x20
+
+#endif /* HARDWARE_H_ */
diff --git a/board/eNET/u-boot.lds b/board/eNET/u-boot.lds
new file mode 100644
index 0000000000..f3d28ef945
--- /dev/null
+++ b/board/eNET/u-boot.lds
@@ -0,0 +1,90 @@
+/*
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
+ *
+ * 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-i386", "elf32-i386", "elf32-i386")
+OUTPUT_ARCH(i386)
+ENTRY(_start)
+
+SECTIONS
+{
+	. = 0x38040000;		/* Location of bootcode in flash */
+	.text  : { *(.text); }
+
+	. = ALIGN(4);
+	.rodata : { *(.rodata) *(.rodata.str1.1) *(.rodata.str1.32) }
+
+	_i386boot_text_size = SIZEOF(.text) + SIZEOF(.rodata);
+
+	. = 0x03FF0000;		/* Ram data segment to use */
+	_i386boot_romdata_dest = ABSOLUTE(.);
+	.data : AT ( LOADADDR(.rodata) + SIZEOF(.rodata) ) { *(.data) }
+	_i386boot_romdata_start = LOADADDR(.data);
+
+	. = ALIGN(4);
+	.got : AT ( LOADADDR(.data) + SIZEOF(.data) ) { *(.got) }
+
+	. = ALIGN(4);
+	__u_boot_cmd_start = .;
+	.u_boot_cmd : { *(.u_boot_cmd) }
+	__u_boot_cmd_end = .;
+	_i386boot_cmd_start = LOADADDR(.u_boot_cmd);
+
+	_i386boot_romdata_size = SIZEOF(.data) + SIZEOF(.got) + SIZEOF(.u_boot_cmd);
+
+	. = ALIGN(4);
+	_i386boot_bss_start = ABSOLUTE(.);
+	.bss (NOLOAD) : { *(.bss) }
+	_i386boot_bss_size = SIZEOF(.bss);
+
+	/* 16bit realmode trampoline code */
+	.realmode 0x7c0 : AT ( LOADADDR(.got) + SIZEOF(.got) + SIZEOF(.u_boot_cmd)) { *(.realmode) }
+
+	_i386boot_realmode = LOADADDR(.realmode);
+	_i386boot_realmode_size = SIZEOF(.realmode);
+
+	/* 16bit BIOS emulation code (just enough to boot Linux) */
+	.bios 0 : AT ( LOADADDR(.realmode) + SIZEOF(.realmode) ) { *(.bios) }
+
+	_i386boot_bios = LOADADDR(.bios);
+	_i386boot_bios_size = SIZEOF(.bios);
+
+	/* The load addresses below assumes that the flash
+	 * will be mapped so that 0x387f0000 == 0xffff0000
+	 * at reset time
+	 *
+	 * The fe00 and ff00 offsets of the start32 and start16
+	 * segments are arbitrary, the just have to be mapped
+	 * at reset and the code have to fit.
+	 * The fff0 offset of reset is important, however.
+	 */
+
+	. = 0xfffffe00;
+	.start32 : AT (0x3807fe00) { *(.start32); }
+
+	. = 0xf800;
+	.start16 : AT (0x3807f800) { *(.start16); }
+
+	. = 0xfff0;
+	.reset : AT (0x3807fff0) { *(.reset); }
+	_i386boot_end = (LOADADDR(.reset) + SIZEOF(.reset) );
+}