1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/*
* linux/arch/arm/boot/compressed/head-sharpsl.S
*
* Copyright (C) 2004-2005 Richard Purdie <rpurdie@rpsys.net>
*
* Sharp's bootloader doesn't pass any kind of machine ID
* so we have to figure out the machine for ourselves...
*
* Support for Poodle, Corgi (SL-C700), Shepherd (SL-C750)
* Husky (SL-C760), Tosa (SL-C6000), Spitz (SL-C3000),
* Akita (SL-C1000) and Borzoi (SL-C3100).
*
*/
#include <linux/linkage.h>
#include <asm/mach-types.h>
#ifndef CONFIG_PXA_SHARPSL
#error What am I doing here...
#endif
.section ".start", "ax"
__SharpSL_start:
/* Check for TC6393 - if found we have a Tosa */
ldr r7, .TOSAID
mov r1, #0x10000000 @ Base address of TC6393 chip
mov r6, #0x03
ldrh r3, [r1, #8] @ Load TC6393XB Revison: This is 0x0003
cmp r6, r3
beq .SHARPEND @ Success -> tosa
/* Check for pxa270 - if found, branch */
mrc p15, 0, r4, c0, c0 @ Get Processor ID
and r4, r4, #0xffffff00
ldr r3, .PXA270ID
cmp r4, r3
beq .PXA270
/* Check for w100 - if not found we have a Poodle */
ldr r1, .W100ADDR @ Base address of w100 chip + regs offset
mov r6, #0x31 @ Load Magic Init value
str r6, [r1, #0x280] @ to SCRATCH_UMSK
mov r5, #0x3000
.W100LOOP:
subs r5, r5, #1
bne .W100LOOP
mov r6, #0x30 @ Load 2nd Magic Init value
str r6, [r1, #0x280] @ to SCRATCH_UMSK
ldr r6, [r1, #0] @ Load Chip ID
ldr r3, .W100ID
ldr r7, .POODLEID
cmp r6, r3
bne .SHARPEND @ We have no w100 - Poodle
/* Check for pxa250 - if found we have a Corgi */
ldr r7, .CORGIID
ldr r3, .PXA255ID
cmp r4, r3
blo .SHARPEND @ We have a PXA250 - Corgi
/* Check for 64MiB flash - if found we have a Shepherd */
bl get_flash_ids
ldr r7, .SHEPHERDID
cmp r3, #0x76 @ 64MiB flash
beq .SHARPEND @ We have Shepherd
/* Must be a Husky */
ldr r7, .HUSKYID @ Must be Husky
b .SHARPEND
.PXA270:
/* Check for 16MiB flash - if found we have Spitz */
bl get_flash_ids
ldr r7, .SPITZID
cmp r3, #0x73 @ 16MiB flash
beq .SHARPEND @ We have Spitz
/* Check for a second SCOOP chip - if found we have Borzoi */
ldr r1, .SCOOP2ADDR
ldr r7, .BORZOIID
mov r6, #0x0140
strh r6, [r1]
ldrh r6, [r1]
cmp r6, #0x0140
beq .SHARPEND @ We have Borzoi
/* Must be Akita */
ldr r7, .AKITAID
b .SHARPEND @ We have Borzoi
.PXA255ID:
.word 0x69052d00 @ PXA255 Processor ID
.PXA270ID:
.word 0x69054100 @ PXA270 Processor ID
.W100ID:
.word 0x57411002 @ w100 Chip ID
.W100ADDR:
.word 0x08010000 @ w100 Chip ID Reg Address
.SCOOP2ADDR:
.word 0x08800040
.POODLEID:
.word MACH_TYPE_POODLE
.CORGIID:
.word MACH_TYPE_CORGI
.SHEPHERDID:
.word MACH_TYPE_SHEPHERD
.HUSKYID:
.word MACH_TYPE_HUSKY
.TOSAID:
.word MACH_TYPE_TOSA
.SPITZID:
.word MACH_TYPE_SPITZ
.AKITAID:
.word MACH_TYPE_AKITA
.BORZOIID:
.word MACH_TYPE_BORZOI
/*
* Return: r2 - NAND Manufacturer ID
* r3 - NAND Chip ID
* Corrupts: r1
*/
get_flash_ids:
mov r1, #0x0c000000 @ Base address of NAND chip
ldrb r3, [r1, #24] @ Load FLASHCTL
bic r3, r3, #0x11 @ SET NCE
orr r3, r3, #0x0a @ SET CLR + FLWP
strb r3, [r1, #24] @ Save to FLASHCTL
mov r2, #0x90 @ Command "readid"
strb r2, [r1, #20] @ Save to FLASHIO
bic r3, r3, #2 @ CLR CLE
orr r3, r3, #4 @ SET ALE
strb r3, [r1, #24] @ Save to FLASHCTL
mov r2, #0 @ Address 0x00
strb r2, [r1, #20] @ Save to FLASHIO
bic r3, r3, #4 @ CLR ALE
strb r3, [r1, #24] @ Save to FLASHCTL
.fids1:
ldrb r3, [r1, #24] @ Load FLASHCTL
tst r3, #32 @ Is chip ready?
beq .fids1
ldrb r2, [r1, #20] @ NAND Manufacturer ID
ldrb r3, [r1, #20] @ NAND Chip ID
mov pc, lr
.SHARPEND:
|
