[ARM] 2883/1: PXA Sharpsl: Add detection of new PXA based Zaurii machine types

Patch from Richard Purdie

Add machine detection routines for several new models of PXA based Zaurii
(SL-C3000 - Spitz, SL-C1000 - Akita, SL-C3100 - Borzoi, SL-C6000 - Tosa).
Sharp continue to use broken bootloaders in ROM.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 85 insertions, 26 deletions

diff --git a/arch/arm/boot/compressed/head-sharpsl.S b/arch/arm/boot/compressed/head-sharpsl.S
index d6bf8a2..59ad696 100644
--- a/arch/arm/boot/compressed/head-sharpsl.S
+++ b/arch/arm/boot/compressed/head-sharpsl.S
@@ -7,7 +7,8 @@
  * so we have to figure out the machine for ourselves...
  *
  * Support for Poodle, Corgi (SL-C700), Shepherd (SL-C750)
- * and Husky (SL-C760).
+ * Husky (SL-C760), Tosa (SL-C6000), Spitz (SL-C3000),
+ * Akita (SL-C1000) and Borzoi (SL-C3100).
  *
  */
 
@@ -23,6 +24,22 @@
 
 __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
@@ -30,7 +47,7 @@ __SharpSL_start:
 	mov r5, #0x3000
 .W100LOOP:
 	subs r5, r5, #1
-    bne .W100LOOP
+	bne .W100LOOP
 	mov r6, #0x30			@ Load 2nd Magic Init value
 	str	r6, [r1, #0x280]	@ to SCRATCH_UMSK
 
@@ -40,45 +57,52 @@ __SharpSL_start:
 	cmp	r6, r3
 	bne	.SHARPEND			@ We have no w100 - Poodle
 
-	mrc p15, 0, r6, c0, c0	@ Get Processor ID
-	and	r6, r6, #0xffffff00
+/* Check for pxa250 - if found we have a Corgi */
 	ldr	r7, .CORGIID
 	ldr	r3, .PXA255ID
-	cmp	r6, r3
+	cmp	r4, 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
+/* 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:
@@ -87,6 +111,41 @@ __SharpSL_start:
 	.word	MACH_TYPE_SHEPHERD
 .HUSKYID:
 	.word	MACH_TYPE_HUSKY
-.SHARPEND:
+.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: