1 files changed, 92 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/head-sharpsl.S b/arch/arm/boot/compressed/head-sharpsl.S
new file mode 100644
index 0000000..d6bf8a2
--- /dev/null
+++ b/arch/arm/boot/compressed/head-sharpsl.S
@@ -0,0 +1,92 @@
+/*
+ * 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)
+ * and Husky (SL-C760).
+ *
+ */
+
+#include <linux/config.h>
+#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:
+
+	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
+
+	mrc p15, 0, r6, c0, c0	@ Get Processor ID
+	and	r6, r6, #0xffffff00
+	ldr	r7, .CORGIID
+	ldr	r3, .PXA255ID
+	cmp	r6, r3
+	blo	.SHARPEND			@ We have a PXA250 - Corgi
+
+	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
+.SHARP1:
+	ldrb	r3, [r1, #24]	@ Load FLASHCTL
+	tst	r3, #32				@ Is chip ready?
+	beq	.SHARP1
+	ldrb	r2, [r1, #20]	@ NAND Manufacturer ID
+	ldrb	r3, [r1, #20]	@ NAND Chip ID
+	ldr	r7, .SHEPHERDID
+	cmp	r3, #0x76			@ 64MiB flash
+	beq	.SHARPEND			@ We have Shepherd
+	ldr	r7, .HUSKYID		@ Must be Husky
+	b .SHARPEND
+
+.PXA255ID:
+	.word	0x69052d00		@ PXA255 Processor ID
+.W100ID:
+	.word	0x57411002		@ w100 Chip ID
+.W100ADDR:
+	.word 	0x08010000		@ w100 Chip ID Reg Address
+.POODLEID:
+	.word	MACH_TYPE_POODLE
+.CORGIID:
+	.word	MACH_TYPE_CORGI
+.SHEPHERDID:
+	.word	MACH_TYPE_SHEPHERD
+.HUSKYID:
+	.word	MACH_TYPE_HUSKY
+.SHARPEND:
+
+