Merge the new NAND code (testing-NAND brach); see doc/README.nand

Rewrite of NAND code based on what is in 2.6.12 Linux kernel
Patch by Ladislav Michl, 29 Jun 2005

[Merge with /home/tur/nand/u-boot]

1 files changed, 177 insertions, 0 deletions

diff --git a/board/netstar/eeprom_start.S b/board/netstar/eeprom_start.S
new file mode 100644
index 0000000..75d9f05
--- /dev/null
+++ b/board/netstar/eeprom_start.S
@@ -0,0 +1,177 @@
+/*
+ * Copyright (c) 2005  2N Telekomunikace
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ */
+
+.globl _start
+_start:	b       eeprom
+
+#include "crcek.h"
+
+/**
+ * do_crc32 - calculate CRC32 of given buffer
+ * r0 - crc
+ * r1 - pointer to buffer
+ * r2 - buffer len
+ */
+	.macro	do_crc32
+	ldr	r5, FFFFFFFF
+	eor	r0, r0, r5
+	adr	r3, CRC32_TABLE
+1:
+	ldrb    r4, [r1], #1
+	eor	r4, r4, r0
+	and	r4, r4, #0xff
+	ldr	r4, [r3, r4, lsl#2]
+	eor	r0, r4, r0, lsr#8
+	subs	r2, r2, #0x1
+	bne 	1b
+	eor	r0, r0, r5
+	.endm
+
+	.macro crcuj, offset, size
+	ldr	r1, \offset
+	ldr	r2, [r1]
+	cmp	r2, #0		@ no data, no problem
+	beq	2f
+	mov     r7, #1
+	tst	r2, #3		@ unaligned size
+	bne	2f
+	mov     r7, #2
+	ldr	r0, \size
+	cmp	r2, r0		@ bogus size
+	bhi	2f
+	mov     r7, #3
+	add	r1, r1, #4
+	mov	r0, #0
+	do_crc32
+	ldr	r1, [r1]
+2:
+	cmp	r0, r1
+	.endm
+
+	.macro wait, reg
+	mov	\reg, #0x1000
+3:
+	subs	\reg, \reg, #0x1
+	bne 	3b
+
+	.endm
+.text
+.globl crcek
+crcek:
+	mov	r6, #0
+@	crcuj	_LOADER1_OFFSET, _LOADER_SIZE
+@	bne	crc1_bad
+@	orr	r6, r6, #1
+crc1_bad:
+	crcuj	_LOADER2_OFFSET, _LOADER_SIZE
+	bne	crc2_bad
+	orr	r6, r6, #2
+crc2_bad:
+@	mov	r0, r6
+	mov     pc, lr
+	ldr	r3, _LOADER1_OFFSET
+	ldr	r4, _LOADER2_OFFSET
+	tst	r6, #3
+	beq	one_is_bad	@ one of them (or both) has bad crc
+	ldr	r1, [r3, #4]
+	ldr	r2, [r4, #4]
+	cmp	r1, r2		@ boot 2nd loader if versions differ
+	beq	boot_1st
+	b	boot_2nd
+one_is_bad:
+	tst	r6, #1
+	bne	boot_1st
+	tst	r6, #2
+	bne	boot_2nd
+@ We are doomed, so let user know.
+	ldr	r0, GPIO_BASE	@ configure GPIO pins
+	ldr	r1, GPIO_DIRECTION
+	strh	r1, [r0, #0x08]
+blink_loop:
+	mov	r1, #0x08
+	strh    r1, [r0, #0x04]
+	wait	r3
+	mov	r1, #0x10
+	strh    r1, [r0, #0x04]
+	wait	r3
+	b blink_loop
+boot_1st:
+	add	pc, r3, #8
+boot_2nd:
+	add	pc, r4, #8
+
+_LOADER_SIZE:
+	.word LOADER_SIZE - 8	@ minus size and crc32
+_LOADER1_OFFSET:
+	.word LOADER1_OFFSET
+_LOADER2_OFFSET:
+	.word LOADER2_OFFSET
+
+FFFFFFFF:
+	.word 0xffffffff
+CRC32_TABLE:
+	.word 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419
+	.word 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4
+	.word 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07
+	.word 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de
+	.word 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856
+	.word 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9
+	.word 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4
+	.word 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b
+	.word 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3
+	.word 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a
+	.word 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599
+	.word 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924
+	.word 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190
+	.word 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f
+	.word 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e
+	.word 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01
+	.word 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed
+	.word 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950
+	.word 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3
+	.word 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2
+	.word 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a
+	.word 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5
+	.word 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010
+	.word 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f
+	.word 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17
+	.word 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6
+	.word 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615
+	.word 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8
+	.word 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344
+	.word 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb
+	.word 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a
+	.word 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5
+	.word 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1
+	.word 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c
+	.word 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef
+	.word 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236
+	.word 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe
+	.word 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31
+	.word 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c
+	.word 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713
+	.word 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b
+	.word 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242
+	.word 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1
+	.word 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c
+	.word 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278
+	.word 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7
+	.word 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66
+	.word 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9
+	.word 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605
+	.word 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8
+	.word 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b
+	.word 0x2d02ef8d
+
+GPIO_BASE:
+	.word 0xfffce000
+GPIO_DIRECTION:
+	.word 0x0000ffe7
+
+.end