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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/boot/compressed/head-sharpsl.S | |
3 | * | |
4 | * Copyright (C) 2004-2005 Richard Purdie <rpurdie@rpsys.net> | |
5 | * | |
6 | * Sharp's bootloader doesn't pass any kind of machine ID | |
7 | * so we have to figure out the machine for ourselves... | |
8 | * | |
9 | * Support for Poodle, Corgi (SL-C700), Shepherd (SL-C750) | |
fd6480f2 RP |
10 | * Husky (SL-C760), Tosa (SL-C6000), Spitz (SL-C3000), |
11 | * Akita (SL-C1000) and Borzoi (SL-C3100). | |
1da177e4 LT |
12 | * |
13 | */ | |
14 | ||
15 | #include <linux/config.h> | |
16 | #include <linux/linkage.h> | |
17 | #include <asm/mach-types.h> | |
18 | ||
19 | #ifndef CONFIG_PXA_SHARPSL | |
20 | #error What am I doing here... | |
21 | #endif | |
22 | ||
23 | .section ".start", "ax" | |
24 | ||
25 | __SharpSL_start: | |
26 | ||
fd6480f2 RP |
27 | /* Check for TC6393 - if found we have a Tosa */ |
28 | ldr r7, .TOSAID | |
29 | mov r1, #0x10000000 @ Base address of TC6393 chip | |
30 | mov r6, #0x03 | |
31 | ldrh r3, [r1, #8] @ Load TC6393XB Revison: This is 0x0003 | |
32 | cmp r6, r3 | |
33 | beq .SHARPEND @ Success -> tosa | |
34 | ||
35 | /* Check for pxa270 - if found, branch */ | |
36 | mrc p15, 0, r4, c0, c0 @ Get Processor ID | |
37 | and r4, r4, #0xffffff00 | |
38 | ldr r3, .PXA270ID | |
39 | cmp r4, r3 | |
40 | beq .PXA270 | |
41 | ||
42 | /* Check for w100 - if not found we have a Poodle */ | |
1da177e4 LT |
43 | ldr r1, .W100ADDR @ Base address of w100 chip + regs offset |
44 | ||
45 | mov r6, #0x31 @ Load Magic Init value | |
46 | str r6, [r1, #0x280] @ to SCRATCH_UMSK | |
47 | mov r5, #0x3000 | |
48 | .W100LOOP: | |
49 | subs r5, r5, #1 | |
fd6480f2 | 50 | bne .W100LOOP |
1da177e4 LT |
51 | mov r6, #0x30 @ Load 2nd Magic Init value |
52 | str r6, [r1, #0x280] @ to SCRATCH_UMSK | |
53 | ||
54 | ldr r6, [r1, #0] @ Load Chip ID | |
55 | ldr r3, .W100ID | |
56 | ldr r7, .POODLEID | |
57 | cmp r6, r3 | |
58 | bne .SHARPEND @ We have no w100 - Poodle | |
59 | ||
fd6480f2 | 60 | /* Check for pxa250 - if found we have a Corgi */ |
1da177e4 LT |
61 | ldr r7, .CORGIID |
62 | ldr r3, .PXA255ID | |
fd6480f2 | 63 | cmp r4, r3 |
1da177e4 LT |
64 | blo .SHARPEND @ We have a PXA250 - Corgi |
65 | ||
fd6480f2 RP |
66 | /* Check for 64MiB flash - if found we have a Shepherd */ |
67 | bl get_flash_ids | |
1da177e4 LT |
68 | ldr r7, .SHEPHERDID |
69 | cmp r3, #0x76 @ 64MiB flash | |
70 | beq .SHARPEND @ We have Shepherd | |
fd6480f2 RP |
71 | |
72 | /* Must be a Husky */ | |
1da177e4 LT |
73 | ldr r7, .HUSKYID @ Must be Husky |
74 | b .SHARPEND | |
75 | ||
fd6480f2 RP |
76 | .PXA270: |
77 | /* Check for 16MiB flash - if found we have Spitz */ | |
78 | bl get_flash_ids | |
79 | ldr r7, .SPITZID | |
80 | cmp r3, #0x73 @ 16MiB flash | |
81 | beq .SHARPEND @ We have Spitz | |
82 | ||
83 | /* Check for a second SCOOP chip - if found we have Borzoi */ | |
84 | ldr r1, .SCOOP2ADDR | |
85 | ldr r7, .BORZOIID | |
86 | mov r6, #0x0140 | |
87 | strh r6, [r1] | |
88 | ldrh r6, [r1] | |
89 | cmp r6, #0x0140 | |
90 | beq .SHARPEND @ We have Borzoi | |
91 | ||
92 | /* Must be Akita */ | |
93 | ldr r7, .AKITAID | |
94 | b .SHARPEND @ We have Borzoi | |
95 | ||
1da177e4 LT |
96 | .PXA255ID: |
97 | .word 0x69052d00 @ PXA255 Processor ID | |
fd6480f2 RP |
98 | .PXA270ID: |
99 | .word 0x69054100 @ PXA270 Processor ID | |
1da177e4 LT |
100 | .W100ID: |
101 | .word 0x57411002 @ w100 Chip ID | |
102 | .W100ADDR: | |
103 | .word 0x08010000 @ w100 Chip ID Reg Address | |
fd6480f2 RP |
104 | .SCOOP2ADDR: |
105 | .word 0x08800040 | |
1da177e4 LT |
106 | .POODLEID: |
107 | .word MACH_TYPE_POODLE | |
108 | .CORGIID: | |
109 | .word MACH_TYPE_CORGI | |
110 | .SHEPHERDID: | |
111 | .word MACH_TYPE_SHEPHERD | |
112 | .HUSKYID: | |
113 | .word MACH_TYPE_HUSKY | |
fd6480f2 RP |
114 | .TOSAID: |
115 | .word MACH_TYPE_TOSA | |
116 | .SPITZID: | |
117 | .word MACH_TYPE_SPITZ | |
118 | .AKITAID: | |
119 | .word MACH_TYPE_AKITA | |
120 | .BORZOIID: | |
121 | .word MACH_TYPE_BORZOI | |
1da177e4 | 122 | |
fd6480f2 RP |
123 | /* |
124 | * Return: r2 - NAND Manufacturer ID | |
125 | * r3 - NAND Chip ID | |
126 | * Corrupts: r1 | |
127 | */ | |
128 | get_flash_ids: | |
129 | mov r1, #0x0c000000 @ Base address of NAND chip | |
130 | ldrb r3, [r1, #24] @ Load FLASHCTL | |
131 | bic r3, r3, #0x11 @ SET NCE | |
132 | orr r3, r3, #0x0a @ SET CLR + FLWP | |
133 | strb r3, [r1, #24] @ Save to FLASHCTL | |
134 | mov r2, #0x90 @ Command "readid" | |
135 | strb r2, [r1, #20] @ Save to FLASHIO | |
136 | bic r3, r3, #2 @ CLR CLE | |
137 | orr r3, r3, #4 @ SET ALE | |
138 | strb r3, [r1, #24] @ Save to FLASHCTL | |
139 | mov r2, #0 @ Address 0x00 | |
140 | strb r2, [r1, #20] @ Save to FLASHIO | |
141 | bic r3, r3, #4 @ CLR ALE | |
142 | strb r3, [r1, #24] @ Save to FLASHCTL | |
143 | .fids1: | |
144 | ldrb r3, [r1, #24] @ Load FLASHCTL | |
145 | tst r3, #32 @ Is chip ready? | |
146 | beq .fids1 | |
147 | ldrb r2, [r1, #20] @ NAND Manufacturer ID | |
148 | ldrb r3, [r1, #20] @ NAND Chip ID | |
149 | mov pc, lr | |
1da177e4 | 150 | |
fd6480f2 | 151 | .SHARPEND: |