diff options
| author | Alexey Charkov <alchark@gmail.com> | 2010-12-23 13:11:21 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-01-25 15:07:01 +0000 |
| commit | 21f47fbc5b18da4a3db680959aee887612ec9a72 (patch) | |
| tree | 46dd2d4010c5c258f30e2dfeb1ea6d9d2404a845 /arch/arm/boot/compressed | |
| parent | 1bae4ce27c9c90344f23c65ea6966c50ffeae2f5 (diff) | |
ARM: 6597/1: Add basic architecture support for VIA/WonderMedia 85xx SoC's
This adds support for the family of Systems-on-Chip produced initially
by VIA and now its subsidiary WonderMedia that have recently become
widespread in lower-end Chinese ARM-based tablets and netbooks.
Support is included for both VT8500 and WM8505, selectable by a
configuration switch at kernel build time.
Included are basic machine initialization files, register and
interrupt definitions, support for the on-chip interrupt controller,
high-precision OS timer, GPIO lines, necessary macros for early debug,
pulse-width-modulated outputs control, as well as platform device
configurations for the specific drivers implemented elsewhere.
Signed-off-by: Alexey Charkov <alchark@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/boot/compressed')
| -rw-r--r-- | arch/arm/boot/compressed/Makefile | 4 | ||||
| -rw-r--r-- | arch/arm/boot/compressed/head-vt8500.S | 46 |
2 files changed, 50 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index 0a8f748e506a..78fe31a4f503 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -29,6 +29,10 @@ ifeq ($(CONFIG_ARCH_SA1100),y) OBJS += head-sa1100.o endif +ifeq ($(CONFIG_ARCH_VT8500),y) +OBJS += head-vt8500.o +endif + ifeq ($(CONFIG_CPU_XSCALE),y) OBJS += head-xscale.o endif diff --git a/arch/arm/boot/compressed/head-vt8500.S b/arch/arm/boot/compressed/head-vt8500.S new file mode 100644 index 000000000000..1dc1e21a3be3 --- /dev/null +++ b/arch/arm/boot/compressed/head-vt8500.S @@ -0,0 +1,46 @@ +/* + * linux/arch/arm/boot/compressed/head-vt8500.S + * + * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> + * + * VIA VT8500 specific tweaks. This is merged into head.S by the linker. + * + */ + +#include <linux/linkage.h> +#include <asm/mach-types.h> + + .section ".start", "ax" + +__VT8500_start: + @ Compare the SCC ID register against a list of known values + ldr r1, .SCCID + ldr r3, [r1] + + @ VT8500 override + ldr r4, .VT8500SCC + cmp r3, r4 + ldreq r7, .ID_BV07 + beq .Lendvt8500 + + @ WM8505 override + ldr r4, .WM8505SCC + cmp r3, r4 + ldreq r7, .ID_8505 + beq .Lendvt8500 + + @ Otherwise, leave the bootloader's machine id untouched + +.SCCID: + .word 0xd8120000 +.VT8500SCC: + .word 0x34000102 +.WM8505SCC: + .word 0x34260103 + +.ID_BV07: + .word MACH_TYPE_BV07 +.ID_8505: + .word MACH_TYPE_WM8505_7IN_NETBOOK + +.Lendvt8500: |